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Error for mismatched powerpc ABI tags
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2018 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x1000
68 #define ELF_RELROPAGESIZE ELF_MAXPAGESIZE
69 #define elf_info_to_howto ppc64_elf_info_to_howto
70
71 #define elf_backend_want_got_sym 0
72 #define elf_backend_want_plt_sym 0
73 #define elf_backend_plt_alignment 3
74 #define elf_backend_plt_not_loaded 1
75 #define elf_backend_got_header_size 8
76 #define elf_backend_want_dynrelro 1
77 #define elf_backend_can_gc_sections 1
78 #define elf_backend_can_refcount 1
79 #define elf_backend_rela_normal 1
80 #define elf_backend_dtrel_excludes_plt 1
81 #define elf_backend_default_execstack 0
82
83 #define bfd_elf64_mkobject ppc64_elf_mkobject
84 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
85 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
86 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
87 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
88 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
89 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
90 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
91 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
92 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
93
94 #define elf_backend_object_p ppc64_elf_object_p
95 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
96 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
97 #define elf_backend_write_core_note ppc64_elf_write_core_note
98 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
99 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
100 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
101 #define elf_backend_check_directives ppc64_elf_before_check_relocs
102 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
103 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
104 #define elf_backend_check_relocs ppc64_elf_check_relocs
105 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
106 #define elf_backend_gc_keep ppc64_elf_gc_keep
107 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
108 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
109 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
110 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
111 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
112 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
113 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
114 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
115 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
116 #define elf_backend_action_discarded ppc64_elf_action_discarded
117 #define elf_backend_relocate_section ppc64_elf_relocate_section
118 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
119 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
120 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
121 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
122 #define elf_backend_special_sections ppc64_elf_special_sections
123 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
124 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
125 #define elf_backend_get_reloc_section bfd_get_section_by_name
126
127 /* The name of the dynamic interpreter. This is put in the .interp
128 section. */
129 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
130
131 /* The size in bytes of an entry in the procedure linkage table. */
132 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
133 #define LOCAL_PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 16 : 8)
134
135 /* The initial size of the plt reserved for the dynamic linker. */
136 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
137
138 /* Offsets to some stack save slots. */
139 #define STK_LR 16
140 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
141 /* This one is dodgy. ELFv2 does not have a linker word, so use the
142 CR save slot. Used only by optimised __tls_get_addr call stub,
143 relying on __tls_get_addr_opt not saving CR.. */
144 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
145
146 /* TOC base pointers offset from start of TOC. */
147 #define TOC_BASE_OFF 0x8000
148 /* TOC base alignment. */
149 #define TOC_BASE_ALIGN 256
150
151 /* Offset of tp and dtp pointers from start of TLS block. */
152 #define TP_OFFSET 0x7000
153 #define DTP_OFFSET 0x8000
154
155 /* .plt call stub instructions. The normal stub is like this, but
156 sometimes the .plt entry crosses a 64k boundary and we need to
157 insert an addi to adjust r11. */
158 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
159 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
160 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
161 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
162 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
163 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
164 #define BCTR 0x4e800420 /* bctr */
165
166 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
167 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
168 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
169
170 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
171 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
172 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
173 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
174 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
175 #define BNECTR 0x4ca20420 /* bnectr+ */
176 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
177
178 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
179 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
180 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
181
182 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
183 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
184 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
185
186 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
187 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
188 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
189 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
190 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
191
192 /* __glink_PLTresolve stub instructions. We enter with the index in R0. */
193 #define GLINK_PLTRESOLVE_SIZE(htab) \
194 (8u + (htab->opd_abi ? 11 * 4 : 14 * 4))
195 /* 0: */
196 /* .quad plt0-1f */
197 /* __glink: */
198 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
199 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
200 /* 1: */
201 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
202 /* ld %2,(0b-1b)(%11) */
203 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
204 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
205 /* ld %12,0(%11) */
206 /* ld %2,8(%11) */
207 /* mtctr %12 */
208 /* ld %11,16(%11) */
209 /* bctr */
210 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
211 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
212 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
213 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
214 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
215
216 /* Pad with this. */
217 #define NOP 0x60000000
218
219 /* Some other nops. */
220 #define CROR_151515 0x4def7b82
221 #define CROR_313131 0x4ffffb82
222
223 /* .glink entries for the first 32k functions are two instructions. */
224 #define LI_R0_0 0x38000000 /* li %r0,0 */
225 #define B_DOT 0x48000000 /* b . */
226
227 /* After that, we need two instructions to load the index, followed by
228 a branch. */
229 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
230 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
231
232 /* Instructions used by the save and restore reg functions. */
233 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
234 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
235 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
236 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
237 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
238 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
239 #define LI_R12_0 0x39800000 /* li %r12,0 */
240 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
241 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
242 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
243 #define BLR 0x4e800020 /* blr */
244
245 /* Since .opd is an array of descriptors and each entry will end up
246 with identical R_PPC64_RELATIVE relocs, there is really no need to
247 propagate .opd relocs; The dynamic linker should be taught to
248 relocate .opd without reloc entries. */
249 #ifndef NO_OPD_RELOCS
250 #define NO_OPD_RELOCS 0
251 #endif
252
253 #ifndef ARRAY_SIZE
254 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
255 #endif
256
257 static inline int
258 abiversion (bfd *abfd)
259 {
260 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
261 }
262
263 static inline void
264 set_abiversion (bfd *abfd, int ver)
265 {
266 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
267 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
268 }
269 \f
270 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
271
272 /* Relocation HOWTO's. */
273 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
274
275 static reloc_howto_type ppc64_elf_howto_raw[] =
276 {
277 /* This reloc does nothing. */
278 HOWTO (R_PPC64_NONE, /* type */
279 0, /* rightshift */
280 3, /* size (0 = byte, 1 = short, 2 = long) */
281 0, /* bitsize */
282 FALSE, /* pc_relative */
283 0, /* bitpos */
284 complain_overflow_dont, /* complain_on_overflow */
285 bfd_elf_generic_reloc, /* special_function */
286 "R_PPC64_NONE", /* name */
287 FALSE, /* partial_inplace */
288 0, /* src_mask */
289 0, /* dst_mask */
290 FALSE), /* pcrel_offset */
291
292 /* A standard 32 bit relocation. */
293 HOWTO (R_PPC64_ADDR32, /* type */
294 0, /* rightshift */
295 2, /* size (0 = byte, 1 = short, 2 = long) */
296 32, /* bitsize */
297 FALSE, /* pc_relative */
298 0, /* bitpos */
299 complain_overflow_bitfield, /* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_PPC64_ADDR32", /* name */
302 FALSE, /* partial_inplace */
303 0, /* src_mask */
304 0xffffffff, /* dst_mask */
305 FALSE), /* pcrel_offset */
306
307 /* An absolute 26 bit branch; the lower two bits must be zero.
308 FIXME: we don't check that, we just clear them. */
309 HOWTO (R_PPC64_ADDR24, /* type */
310 0, /* rightshift */
311 2, /* size (0 = byte, 1 = short, 2 = long) */
312 26, /* bitsize */
313 FALSE, /* pc_relative */
314 0, /* bitpos */
315 complain_overflow_bitfield, /* complain_on_overflow */
316 bfd_elf_generic_reloc, /* special_function */
317 "R_PPC64_ADDR24", /* name */
318 FALSE, /* partial_inplace */
319 0, /* src_mask */
320 0x03fffffc, /* dst_mask */
321 FALSE), /* pcrel_offset */
322
323 /* A standard 16 bit relocation. */
324 HOWTO (R_PPC64_ADDR16, /* type */
325 0, /* rightshift */
326 1, /* size (0 = byte, 1 = short, 2 = long) */
327 16, /* bitsize */
328 FALSE, /* pc_relative */
329 0, /* bitpos */
330 complain_overflow_bitfield, /* complain_on_overflow */
331 bfd_elf_generic_reloc, /* special_function */
332 "R_PPC64_ADDR16", /* name */
333 FALSE, /* partial_inplace */
334 0, /* src_mask */
335 0xffff, /* dst_mask */
336 FALSE), /* pcrel_offset */
337
338 /* A 16 bit relocation without overflow. */
339 HOWTO (R_PPC64_ADDR16_LO, /* type */
340 0, /* rightshift */
341 1, /* size (0 = byte, 1 = short, 2 = long) */
342 16, /* bitsize */
343 FALSE, /* pc_relative */
344 0, /* bitpos */
345 complain_overflow_dont,/* complain_on_overflow */
346 bfd_elf_generic_reloc, /* special_function */
347 "R_PPC64_ADDR16_LO", /* name */
348 FALSE, /* partial_inplace */
349 0, /* src_mask */
350 0xffff, /* dst_mask */
351 FALSE), /* pcrel_offset */
352
353 /* Bits 16-31 of an address. */
354 HOWTO (R_PPC64_ADDR16_HI, /* type */
355 16, /* rightshift */
356 1, /* size (0 = byte, 1 = short, 2 = long) */
357 16, /* bitsize */
358 FALSE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_signed, /* complain_on_overflow */
361 bfd_elf_generic_reloc, /* special_function */
362 "R_PPC64_ADDR16_HI", /* name */
363 FALSE, /* partial_inplace */
364 0, /* src_mask */
365 0xffff, /* dst_mask */
366 FALSE), /* pcrel_offset */
367
368 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
369 bits, treated as a signed number, is negative. */
370 HOWTO (R_PPC64_ADDR16_HA, /* type */
371 16, /* rightshift */
372 1, /* size (0 = byte, 1 = short, 2 = long) */
373 16, /* bitsize */
374 FALSE, /* pc_relative */
375 0, /* bitpos */
376 complain_overflow_signed, /* complain_on_overflow */
377 ppc64_elf_ha_reloc, /* special_function */
378 "R_PPC64_ADDR16_HA", /* name */
379 FALSE, /* partial_inplace */
380 0, /* src_mask */
381 0xffff, /* dst_mask */
382 FALSE), /* pcrel_offset */
383
384 /* An absolute 16 bit branch; the lower two bits must be zero.
385 FIXME: we don't check that, we just clear them. */
386 HOWTO (R_PPC64_ADDR14, /* type */
387 0, /* rightshift */
388 2, /* size (0 = byte, 1 = short, 2 = long) */
389 16, /* bitsize */
390 FALSE, /* pc_relative */
391 0, /* bitpos */
392 complain_overflow_signed, /* complain_on_overflow */
393 ppc64_elf_branch_reloc, /* special_function */
394 "R_PPC64_ADDR14", /* name */
395 FALSE, /* partial_inplace */
396 0, /* src_mask */
397 0x0000fffc, /* dst_mask */
398 FALSE), /* pcrel_offset */
399
400 /* An absolute 16 bit branch, for which bit 10 should be set to
401 indicate that the branch is expected to be taken. The lower two
402 bits must be zero. */
403 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
404 0, /* rightshift */
405 2, /* size (0 = byte, 1 = short, 2 = long) */
406 16, /* bitsize */
407 FALSE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_signed, /* complain_on_overflow */
410 ppc64_elf_brtaken_reloc, /* special_function */
411 "R_PPC64_ADDR14_BRTAKEN",/* name */
412 FALSE, /* partial_inplace */
413 0, /* src_mask */
414 0x0000fffc, /* dst_mask */
415 FALSE), /* pcrel_offset */
416
417 /* An absolute 16 bit branch, for which bit 10 should be set to
418 indicate that the branch is not expected to be taken. The lower
419 two bits must be zero. */
420 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
421 0, /* rightshift */
422 2, /* size (0 = byte, 1 = short, 2 = long) */
423 16, /* bitsize */
424 FALSE, /* pc_relative */
425 0, /* bitpos */
426 complain_overflow_signed, /* complain_on_overflow */
427 ppc64_elf_brtaken_reloc, /* special_function */
428 "R_PPC64_ADDR14_BRNTAKEN",/* name */
429 FALSE, /* partial_inplace */
430 0, /* src_mask */
431 0x0000fffc, /* dst_mask */
432 FALSE), /* pcrel_offset */
433
434 /* A relative 26 bit branch; the lower two bits must be zero. */
435 HOWTO (R_PPC64_REL24, /* type */
436 0, /* rightshift */
437 2, /* size (0 = byte, 1 = short, 2 = long) */
438 26, /* bitsize */
439 TRUE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_signed, /* complain_on_overflow */
442 ppc64_elf_branch_reloc, /* special_function */
443 "R_PPC64_REL24", /* name */
444 FALSE, /* partial_inplace */
445 0, /* src_mask */
446 0x03fffffc, /* dst_mask */
447 TRUE), /* pcrel_offset */
448
449 /* A relative 16 bit branch; the lower two bits must be zero. */
450 HOWTO (R_PPC64_REL14, /* type */
451 0, /* rightshift */
452 2, /* size (0 = byte, 1 = short, 2 = long) */
453 16, /* bitsize */
454 TRUE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_signed, /* complain_on_overflow */
457 ppc64_elf_branch_reloc, /* special_function */
458 "R_PPC64_REL14", /* name */
459 FALSE, /* partial_inplace */
460 0, /* src_mask */
461 0x0000fffc, /* dst_mask */
462 TRUE), /* pcrel_offset */
463
464 /* A relative 16 bit branch. Bit 10 should be set to indicate that
465 the branch is expected to be taken. The lower two bits must be
466 zero. */
467 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
468 0, /* rightshift */
469 2, /* size (0 = byte, 1 = short, 2 = long) */
470 16, /* bitsize */
471 TRUE, /* pc_relative */
472 0, /* bitpos */
473 complain_overflow_signed, /* complain_on_overflow */
474 ppc64_elf_brtaken_reloc, /* special_function */
475 "R_PPC64_REL14_BRTAKEN", /* name */
476 FALSE, /* partial_inplace */
477 0, /* src_mask */
478 0x0000fffc, /* dst_mask */
479 TRUE), /* pcrel_offset */
480
481 /* A relative 16 bit branch. Bit 10 should be set to indicate that
482 the branch is not expected to be taken. The lower two bits must
483 be zero. */
484 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
485 0, /* rightshift */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
487 16, /* bitsize */
488 TRUE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_signed, /* complain_on_overflow */
491 ppc64_elf_brtaken_reloc, /* special_function */
492 "R_PPC64_REL14_BRNTAKEN",/* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0x0000fffc, /* dst_mask */
496 TRUE), /* pcrel_offset */
497
498 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
499 symbol. */
500 HOWTO (R_PPC64_GOT16, /* type */
501 0, /* rightshift */
502 1, /* size (0 = byte, 1 = short, 2 = long) */
503 16, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_signed, /* complain_on_overflow */
507 ppc64_elf_unhandled_reloc, /* special_function */
508 "R_PPC64_GOT16", /* name */
509 FALSE, /* partial_inplace */
510 0, /* src_mask */
511 0xffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
515 the symbol. */
516 HOWTO (R_PPC64_GOT16_LO, /* type */
517 0, /* rightshift */
518 1, /* size (0 = byte, 1 = short, 2 = long) */
519 16, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_dont, /* complain_on_overflow */
523 ppc64_elf_unhandled_reloc, /* special_function */
524 "R_PPC64_GOT16_LO", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0xffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
531 the symbol. */
532 HOWTO (R_PPC64_GOT16_HI, /* type */
533 16, /* rightshift */
534 1, /* size (0 = byte, 1 = short, 2 = long) */
535 16, /* bitsize */
536 FALSE, /* pc_relative */
537 0, /* bitpos */
538 complain_overflow_signed,/* complain_on_overflow */
539 ppc64_elf_unhandled_reloc, /* special_function */
540 "R_PPC64_GOT16_HI", /* name */
541 FALSE, /* partial_inplace */
542 0, /* src_mask */
543 0xffff, /* dst_mask */
544 FALSE), /* pcrel_offset */
545
546 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
547 the symbol. */
548 HOWTO (R_PPC64_GOT16_HA, /* type */
549 16, /* rightshift */
550 1, /* size (0 = byte, 1 = short, 2 = long) */
551 16, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_signed,/* complain_on_overflow */
555 ppc64_elf_unhandled_reloc, /* special_function */
556 "R_PPC64_GOT16_HA", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0xffff, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* This is used only by the dynamic linker. The symbol should exist
563 both in the object being run and in some shared library. The
564 dynamic linker copies the data addressed by the symbol from the
565 shared library into the object, because the object being
566 run has to have the data at some particular address. */
567 HOWTO (R_PPC64_COPY, /* type */
568 0, /* rightshift */
569 0, /* this one is variable size */
570 0, /* bitsize */
571 FALSE, /* pc_relative */
572 0, /* bitpos */
573 complain_overflow_dont, /* complain_on_overflow */
574 ppc64_elf_unhandled_reloc, /* special_function */
575 "R_PPC64_COPY", /* name */
576 FALSE, /* partial_inplace */
577 0, /* src_mask */
578 0, /* dst_mask */
579 FALSE), /* pcrel_offset */
580
581 /* Like R_PPC64_ADDR64, but used when setting global offset table
582 entries. */
583 HOWTO (R_PPC64_GLOB_DAT, /* type */
584 0, /* rightshift */
585 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
586 64, /* bitsize */
587 FALSE, /* pc_relative */
588 0, /* bitpos */
589 complain_overflow_dont, /* complain_on_overflow */
590 ppc64_elf_unhandled_reloc, /* special_function */
591 "R_PPC64_GLOB_DAT", /* name */
592 FALSE, /* partial_inplace */
593 0, /* src_mask */
594 ONES (64), /* dst_mask */
595 FALSE), /* pcrel_offset */
596
597 /* Created by the link editor. Marks a procedure linkage table
598 entry for a symbol. */
599 HOWTO (R_PPC64_JMP_SLOT, /* type */
600 0, /* rightshift */
601 0, /* size (0 = byte, 1 = short, 2 = long) */
602 0, /* bitsize */
603 FALSE, /* pc_relative */
604 0, /* bitpos */
605 complain_overflow_dont, /* complain_on_overflow */
606 ppc64_elf_unhandled_reloc, /* special_function */
607 "R_PPC64_JMP_SLOT", /* name */
608 FALSE, /* partial_inplace */
609 0, /* src_mask */
610 0, /* dst_mask */
611 FALSE), /* pcrel_offset */
612
613 /* Used only by the dynamic linker. When the object is run, this
614 doubleword64 is set to the load address of the object, plus the
615 addend. */
616 HOWTO (R_PPC64_RELATIVE, /* type */
617 0, /* rightshift */
618 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
619 64, /* bitsize */
620 FALSE, /* pc_relative */
621 0, /* bitpos */
622 complain_overflow_dont, /* complain_on_overflow */
623 bfd_elf_generic_reloc, /* special_function */
624 "R_PPC64_RELATIVE", /* name */
625 FALSE, /* partial_inplace */
626 0, /* src_mask */
627 ONES (64), /* dst_mask */
628 FALSE), /* pcrel_offset */
629
630 /* Like R_PPC64_ADDR32, but may be unaligned. */
631 HOWTO (R_PPC64_UADDR32, /* type */
632 0, /* rightshift */
633 2, /* size (0 = byte, 1 = short, 2 = long) */
634 32, /* bitsize */
635 FALSE, /* pc_relative */
636 0, /* bitpos */
637 complain_overflow_bitfield, /* complain_on_overflow */
638 bfd_elf_generic_reloc, /* special_function */
639 "R_PPC64_UADDR32", /* name */
640 FALSE, /* partial_inplace */
641 0, /* src_mask */
642 0xffffffff, /* dst_mask */
643 FALSE), /* pcrel_offset */
644
645 /* Like R_PPC64_ADDR16, but may be unaligned. */
646 HOWTO (R_PPC64_UADDR16, /* type */
647 0, /* rightshift */
648 1, /* size (0 = byte, 1 = short, 2 = long) */
649 16, /* bitsize */
650 FALSE, /* pc_relative */
651 0, /* bitpos */
652 complain_overflow_bitfield, /* complain_on_overflow */
653 bfd_elf_generic_reloc, /* special_function */
654 "R_PPC64_UADDR16", /* name */
655 FALSE, /* partial_inplace */
656 0, /* src_mask */
657 0xffff, /* dst_mask */
658 FALSE), /* pcrel_offset */
659
660 /* 32-bit PC relative. */
661 HOWTO (R_PPC64_REL32, /* type */
662 0, /* rightshift */
663 2, /* size (0 = byte, 1 = short, 2 = long) */
664 32, /* bitsize */
665 TRUE, /* pc_relative */
666 0, /* bitpos */
667 complain_overflow_signed, /* complain_on_overflow */
668 bfd_elf_generic_reloc, /* special_function */
669 "R_PPC64_REL32", /* name */
670 FALSE, /* partial_inplace */
671 0, /* src_mask */
672 0xffffffff, /* dst_mask */
673 TRUE), /* pcrel_offset */
674
675 /* 32-bit relocation to the symbol's procedure linkage table. */
676 HOWTO (R_PPC64_PLT32, /* type */
677 0, /* rightshift */
678 2, /* size (0 = byte, 1 = short, 2 = long) */
679 32, /* bitsize */
680 FALSE, /* pc_relative */
681 0, /* bitpos */
682 complain_overflow_bitfield, /* complain_on_overflow */
683 ppc64_elf_unhandled_reloc, /* special_function */
684 "R_PPC64_PLT32", /* name */
685 FALSE, /* partial_inplace */
686 0, /* src_mask */
687 0xffffffff, /* dst_mask */
688 FALSE), /* pcrel_offset */
689
690 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
691 FIXME: R_PPC64_PLTREL32 not supported. */
692 HOWTO (R_PPC64_PLTREL32, /* type */
693 0, /* rightshift */
694 2, /* size (0 = byte, 1 = short, 2 = long) */
695 32, /* bitsize */
696 TRUE, /* pc_relative */
697 0, /* bitpos */
698 complain_overflow_signed, /* complain_on_overflow */
699 ppc64_elf_unhandled_reloc, /* special_function */
700 "R_PPC64_PLTREL32", /* name */
701 FALSE, /* partial_inplace */
702 0, /* src_mask */
703 0xffffffff, /* dst_mask */
704 TRUE), /* pcrel_offset */
705
706 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
707 the symbol. */
708 HOWTO (R_PPC64_PLT16_LO, /* type */
709 0, /* rightshift */
710 1, /* size (0 = byte, 1 = short, 2 = long) */
711 16, /* bitsize */
712 FALSE, /* pc_relative */
713 0, /* bitpos */
714 complain_overflow_dont, /* complain_on_overflow */
715 ppc64_elf_unhandled_reloc, /* special_function */
716 "R_PPC64_PLT16_LO", /* name */
717 FALSE, /* partial_inplace */
718 0, /* src_mask */
719 0xffff, /* dst_mask */
720 FALSE), /* pcrel_offset */
721
722 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
723 the symbol. */
724 HOWTO (R_PPC64_PLT16_HI, /* type */
725 16, /* rightshift */
726 1, /* size (0 = byte, 1 = short, 2 = long) */
727 16, /* bitsize */
728 FALSE, /* pc_relative */
729 0, /* bitpos */
730 complain_overflow_signed, /* complain_on_overflow */
731 ppc64_elf_unhandled_reloc, /* special_function */
732 "R_PPC64_PLT16_HI", /* name */
733 FALSE, /* partial_inplace */
734 0, /* src_mask */
735 0xffff, /* dst_mask */
736 FALSE), /* pcrel_offset */
737
738 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
739 the symbol. */
740 HOWTO (R_PPC64_PLT16_HA, /* type */
741 16, /* rightshift */
742 1, /* size (0 = byte, 1 = short, 2 = long) */
743 16, /* bitsize */
744 FALSE, /* pc_relative */
745 0, /* bitpos */
746 complain_overflow_signed, /* complain_on_overflow */
747 ppc64_elf_unhandled_reloc, /* special_function */
748 "R_PPC64_PLT16_HA", /* name */
749 FALSE, /* partial_inplace */
750 0, /* src_mask */
751 0xffff, /* dst_mask */
752 FALSE), /* pcrel_offset */
753
754 /* 16-bit section relative relocation. */
755 HOWTO (R_PPC64_SECTOFF, /* type */
756 0, /* rightshift */
757 1, /* size (0 = byte, 1 = short, 2 = long) */
758 16, /* bitsize */
759 FALSE, /* pc_relative */
760 0, /* bitpos */
761 complain_overflow_signed, /* complain_on_overflow */
762 ppc64_elf_sectoff_reloc, /* special_function */
763 "R_PPC64_SECTOFF", /* name */
764 FALSE, /* partial_inplace */
765 0, /* src_mask */
766 0xffff, /* dst_mask */
767 FALSE), /* pcrel_offset */
768
769 /* Like R_PPC64_SECTOFF, but no overflow warning. */
770 HOWTO (R_PPC64_SECTOFF_LO, /* type */
771 0, /* rightshift */
772 1, /* size (0 = byte, 1 = short, 2 = long) */
773 16, /* bitsize */
774 FALSE, /* pc_relative */
775 0, /* bitpos */
776 complain_overflow_dont, /* complain_on_overflow */
777 ppc64_elf_sectoff_reloc, /* special_function */
778 "R_PPC64_SECTOFF_LO", /* name */
779 FALSE, /* partial_inplace */
780 0, /* src_mask */
781 0xffff, /* dst_mask */
782 FALSE), /* pcrel_offset */
783
784 /* 16-bit upper half section relative relocation. */
785 HOWTO (R_PPC64_SECTOFF_HI, /* type */
786 16, /* rightshift */
787 1, /* size (0 = byte, 1 = short, 2 = long) */
788 16, /* bitsize */
789 FALSE, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_signed, /* complain_on_overflow */
792 ppc64_elf_sectoff_reloc, /* special_function */
793 "R_PPC64_SECTOFF_HI", /* name */
794 FALSE, /* partial_inplace */
795 0, /* src_mask */
796 0xffff, /* dst_mask */
797 FALSE), /* pcrel_offset */
798
799 /* 16-bit upper half adjusted section relative relocation. */
800 HOWTO (R_PPC64_SECTOFF_HA, /* type */
801 16, /* rightshift */
802 1, /* size (0 = byte, 1 = short, 2 = long) */
803 16, /* bitsize */
804 FALSE, /* pc_relative */
805 0, /* bitpos */
806 complain_overflow_signed, /* complain_on_overflow */
807 ppc64_elf_sectoff_ha_reloc, /* special_function */
808 "R_PPC64_SECTOFF_HA", /* name */
809 FALSE, /* partial_inplace */
810 0, /* src_mask */
811 0xffff, /* dst_mask */
812 FALSE), /* pcrel_offset */
813
814 /* Like R_PPC64_REL24 without touching the two least significant bits. */
815 HOWTO (R_PPC64_REL30, /* type */
816 2, /* rightshift */
817 2, /* size (0 = byte, 1 = short, 2 = long) */
818 30, /* bitsize */
819 TRUE, /* pc_relative */
820 0, /* bitpos */
821 complain_overflow_dont, /* complain_on_overflow */
822 bfd_elf_generic_reloc, /* special_function */
823 "R_PPC64_REL30", /* name */
824 FALSE, /* partial_inplace */
825 0, /* src_mask */
826 0xfffffffc, /* dst_mask */
827 TRUE), /* pcrel_offset */
828
829 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
830
831 /* A standard 64-bit relocation. */
832 HOWTO (R_PPC64_ADDR64, /* type */
833 0, /* rightshift */
834 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
835 64, /* bitsize */
836 FALSE, /* pc_relative */
837 0, /* bitpos */
838 complain_overflow_dont, /* complain_on_overflow */
839 bfd_elf_generic_reloc, /* special_function */
840 "R_PPC64_ADDR64", /* name */
841 FALSE, /* partial_inplace */
842 0, /* src_mask */
843 ONES (64), /* dst_mask */
844 FALSE), /* pcrel_offset */
845
846 /* The bits 32-47 of an address. */
847 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
848 32, /* rightshift */
849 1, /* size (0 = byte, 1 = short, 2 = long) */
850 16, /* bitsize */
851 FALSE, /* pc_relative */
852 0, /* bitpos */
853 complain_overflow_dont, /* complain_on_overflow */
854 bfd_elf_generic_reloc, /* special_function */
855 "R_PPC64_ADDR16_HIGHER", /* name */
856 FALSE, /* partial_inplace */
857 0, /* src_mask */
858 0xffff, /* dst_mask */
859 FALSE), /* pcrel_offset */
860
861 /* The bits 32-47 of an address, plus 1 if the contents of the low
862 16 bits, treated as a signed number, is negative. */
863 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
864 32, /* rightshift */
865 1, /* size (0 = byte, 1 = short, 2 = long) */
866 16, /* bitsize */
867 FALSE, /* pc_relative */
868 0, /* bitpos */
869 complain_overflow_dont, /* complain_on_overflow */
870 ppc64_elf_ha_reloc, /* special_function */
871 "R_PPC64_ADDR16_HIGHERA", /* name */
872 FALSE, /* partial_inplace */
873 0, /* src_mask */
874 0xffff, /* dst_mask */
875 FALSE), /* pcrel_offset */
876
877 /* The bits 48-63 of an address. */
878 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
879 48, /* rightshift */
880 1, /* size (0 = byte, 1 = short, 2 = long) */
881 16, /* bitsize */
882 FALSE, /* pc_relative */
883 0, /* bitpos */
884 complain_overflow_dont, /* complain_on_overflow */
885 bfd_elf_generic_reloc, /* special_function */
886 "R_PPC64_ADDR16_HIGHEST", /* name */
887 FALSE, /* partial_inplace */
888 0, /* src_mask */
889 0xffff, /* dst_mask */
890 FALSE), /* pcrel_offset */
891
892 /* The bits 48-63 of an address, plus 1 if the contents of the low
893 16 bits, treated as a signed number, is negative. */
894 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
895 48, /* rightshift */
896 1, /* size (0 = byte, 1 = short, 2 = long) */
897 16, /* bitsize */
898 FALSE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont, /* complain_on_overflow */
901 ppc64_elf_ha_reloc, /* special_function */
902 "R_PPC64_ADDR16_HIGHESTA", /* name */
903 FALSE, /* partial_inplace */
904 0, /* src_mask */
905 0xffff, /* dst_mask */
906 FALSE), /* pcrel_offset */
907
908 /* Like ADDR64, but may be unaligned. */
909 HOWTO (R_PPC64_UADDR64, /* type */
910 0, /* rightshift */
911 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
912 64, /* bitsize */
913 FALSE, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_dont, /* complain_on_overflow */
916 bfd_elf_generic_reloc, /* special_function */
917 "R_PPC64_UADDR64", /* name */
918 FALSE, /* partial_inplace */
919 0, /* src_mask */
920 ONES (64), /* dst_mask */
921 FALSE), /* pcrel_offset */
922
923 /* 64-bit relative relocation. */
924 HOWTO (R_PPC64_REL64, /* type */
925 0, /* rightshift */
926 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
927 64, /* bitsize */
928 TRUE, /* pc_relative */
929 0, /* bitpos */
930 complain_overflow_dont, /* complain_on_overflow */
931 bfd_elf_generic_reloc, /* special_function */
932 "R_PPC64_REL64", /* name */
933 FALSE, /* partial_inplace */
934 0, /* src_mask */
935 ONES (64), /* dst_mask */
936 TRUE), /* pcrel_offset */
937
938 /* 64-bit relocation to the symbol's procedure linkage table. */
939 HOWTO (R_PPC64_PLT64, /* type */
940 0, /* rightshift */
941 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
942 64, /* bitsize */
943 FALSE, /* pc_relative */
944 0, /* bitpos */
945 complain_overflow_dont, /* complain_on_overflow */
946 ppc64_elf_unhandled_reloc, /* special_function */
947 "R_PPC64_PLT64", /* name */
948 FALSE, /* partial_inplace */
949 0, /* src_mask */
950 ONES (64), /* dst_mask */
951 FALSE), /* pcrel_offset */
952
953 /* 64-bit PC relative relocation to the symbol's procedure linkage
954 table. */
955 /* FIXME: R_PPC64_PLTREL64 not supported. */
956 HOWTO (R_PPC64_PLTREL64, /* type */
957 0, /* rightshift */
958 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
959 64, /* bitsize */
960 TRUE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc64_elf_unhandled_reloc, /* special_function */
964 "R_PPC64_PLTREL64", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 ONES (64), /* dst_mask */
968 TRUE), /* pcrel_offset */
969
970 /* 16 bit TOC-relative relocation. */
971
972 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
973 HOWTO (R_PPC64_TOC16, /* type */
974 0, /* rightshift */
975 1, /* size (0 = byte, 1 = short, 2 = long) */
976 16, /* bitsize */
977 FALSE, /* pc_relative */
978 0, /* bitpos */
979 complain_overflow_signed, /* complain_on_overflow */
980 ppc64_elf_toc_reloc, /* special_function */
981 "R_PPC64_TOC16", /* name */
982 FALSE, /* partial_inplace */
983 0, /* src_mask */
984 0xffff, /* dst_mask */
985 FALSE), /* pcrel_offset */
986
987 /* 16 bit TOC-relative relocation without overflow. */
988
989 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
990 HOWTO (R_PPC64_TOC16_LO, /* type */
991 0, /* rightshift */
992 1, /* size (0 = byte, 1 = short, 2 = long) */
993 16, /* bitsize */
994 FALSE, /* pc_relative */
995 0, /* bitpos */
996 complain_overflow_dont, /* complain_on_overflow */
997 ppc64_elf_toc_reloc, /* special_function */
998 "R_PPC64_TOC16_LO", /* name */
999 FALSE, /* partial_inplace */
1000 0, /* src_mask */
1001 0xffff, /* dst_mask */
1002 FALSE), /* pcrel_offset */
1003
1004 /* 16 bit TOC-relative relocation, high 16 bits. */
1005
1006 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1007 HOWTO (R_PPC64_TOC16_HI, /* type */
1008 16, /* rightshift */
1009 1, /* size (0 = byte, 1 = short, 2 = long) */
1010 16, /* bitsize */
1011 FALSE, /* pc_relative */
1012 0, /* bitpos */
1013 complain_overflow_signed, /* complain_on_overflow */
1014 ppc64_elf_toc_reloc, /* special_function */
1015 "R_PPC64_TOC16_HI", /* name */
1016 FALSE, /* partial_inplace */
1017 0, /* src_mask */
1018 0xffff, /* dst_mask */
1019 FALSE), /* pcrel_offset */
1020
1021 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1022 contents of the low 16 bits, treated as a signed number, is
1023 negative. */
1024
1025 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1026 HOWTO (R_PPC64_TOC16_HA, /* type */
1027 16, /* rightshift */
1028 1, /* size (0 = byte, 1 = short, 2 = long) */
1029 16, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_signed, /* complain_on_overflow */
1033 ppc64_elf_toc_ha_reloc, /* special_function */
1034 "R_PPC64_TOC16_HA", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0xffff, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1041
1042 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1043 HOWTO (R_PPC64_TOC, /* type */
1044 0, /* rightshift */
1045 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1046 64, /* bitsize */
1047 FALSE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_dont, /* complain_on_overflow */
1050 ppc64_elf_toc64_reloc, /* special_function */
1051 "R_PPC64_TOC", /* name */
1052 FALSE, /* partial_inplace */
1053 0, /* src_mask */
1054 ONES (64), /* dst_mask */
1055 FALSE), /* pcrel_offset */
1056
1057 /* Like R_PPC64_GOT16, but also informs the link editor that the
1058 value to relocate may (!) refer to a PLT entry which the link
1059 editor (a) may replace with the symbol value. If the link editor
1060 is unable to fully resolve the symbol, it may (b) create a PLT
1061 entry and store the address to the new PLT entry in the GOT.
1062 This permits lazy resolution of function symbols at run time.
1063 The link editor may also skip all of this and just (c) emit a
1064 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1065 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1066 HOWTO (R_PPC64_PLTGOT16, /* type */
1067 0, /* rightshift */
1068 1, /* size (0 = byte, 1 = short, 2 = long) */
1069 16, /* bitsize */
1070 FALSE, /* pc_relative */
1071 0, /* bitpos */
1072 complain_overflow_signed, /* complain_on_overflow */
1073 ppc64_elf_unhandled_reloc, /* special_function */
1074 "R_PPC64_PLTGOT16", /* name */
1075 FALSE, /* partial_inplace */
1076 0, /* src_mask */
1077 0xffff, /* dst_mask */
1078 FALSE), /* pcrel_offset */
1079
1080 /* Like R_PPC64_PLTGOT16, but without overflow. */
1081 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1082 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1083 0, /* rightshift */
1084 1, /* size (0 = byte, 1 = short, 2 = long) */
1085 16, /* bitsize */
1086 FALSE, /* pc_relative */
1087 0, /* bitpos */
1088 complain_overflow_dont, /* complain_on_overflow */
1089 ppc64_elf_unhandled_reloc, /* special_function */
1090 "R_PPC64_PLTGOT16_LO", /* name */
1091 FALSE, /* partial_inplace */
1092 0, /* src_mask */
1093 0xffff, /* dst_mask */
1094 FALSE), /* pcrel_offset */
1095
1096 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1097 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1098 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1099 16, /* rightshift */
1100 1, /* size (0 = byte, 1 = short, 2 = long) */
1101 16, /* bitsize */
1102 FALSE, /* pc_relative */
1103 0, /* bitpos */
1104 complain_overflow_signed, /* complain_on_overflow */
1105 ppc64_elf_unhandled_reloc, /* special_function */
1106 "R_PPC64_PLTGOT16_HI", /* name */
1107 FALSE, /* partial_inplace */
1108 0, /* src_mask */
1109 0xffff, /* dst_mask */
1110 FALSE), /* pcrel_offset */
1111
1112 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1113 1 if the contents of the low 16 bits, treated as a signed number,
1114 is negative. */
1115 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1116 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1117 16, /* rightshift */
1118 1, /* size (0 = byte, 1 = short, 2 = long) */
1119 16, /* bitsize */
1120 FALSE, /* pc_relative */
1121 0, /* bitpos */
1122 complain_overflow_signed, /* complain_on_overflow */
1123 ppc64_elf_unhandled_reloc, /* special_function */
1124 "R_PPC64_PLTGOT16_HA", /* name */
1125 FALSE, /* partial_inplace */
1126 0, /* src_mask */
1127 0xffff, /* dst_mask */
1128 FALSE), /* pcrel_offset */
1129
1130 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1131 HOWTO (R_PPC64_ADDR16_DS, /* type */
1132 0, /* rightshift */
1133 1, /* size (0 = byte, 1 = short, 2 = long) */
1134 16, /* bitsize */
1135 FALSE, /* pc_relative */
1136 0, /* bitpos */
1137 complain_overflow_signed, /* complain_on_overflow */
1138 bfd_elf_generic_reloc, /* special_function */
1139 "R_PPC64_ADDR16_DS", /* name */
1140 FALSE, /* partial_inplace */
1141 0, /* src_mask */
1142 0xfffc, /* dst_mask */
1143 FALSE), /* pcrel_offset */
1144
1145 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1146 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1147 0, /* rightshift */
1148 1, /* size (0 = byte, 1 = short, 2 = long) */
1149 16, /* bitsize */
1150 FALSE, /* pc_relative */
1151 0, /* bitpos */
1152 complain_overflow_dont,/* complain_on_overflow */
1153 bfd_elf_generic_reloc, /* special_function */
1154 "R_PPC64_ADDR16_LO_DS",/* name */
1155 FALSE, /* partial_inplace */
1156 0, /* src_mask */
1157 0xfffc, /* dst_mask */
1158 FALSE), /* pcrel_offset */
1159
1160 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1161 HOWTO (R_PPC64_GOT16_DS, /* type */
1162 0, /* rightshift */
1163 1, /* size (0 = byte, 1 = short, 2 = long) */
1164 16, /* bitsize */
1165 FALSE, /* pc_relative */
1166 0, /* bitpos */
1167 complain_overflow_signed, /* complain_on_overflow */
1168 ppc64_elf_unhandled_reloc, /* special_function */
1169 "R_PPC64_GOT16_DS", /* name */
1170 FALSE, /* partial_inplace */
1171 0, /* src_mask */
1172 0xfffc, /* dst_mask */
1173 FALSE), /* pcrel_offset */
1174
1175 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1176 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1177 0, /* rightshift */
1178 1, /* size (0 = byte, 1 = short, 2 = long) */
1179 16, /* bitsize */
1180 FALSE, /* pc_relative */
1181 0, /* bitpos */
1182 complain_overflow_dont, /* complain_on_overflow */
1183 ppc64_elf_unhandled_reloc, /* special_function */
1184 "R_PPC64_GOT16_LO_DS", /* name */
1185 FALSE, /* partial_inplace */
1186 0, /* src_mask */
1187 0xfffc, /* dst_mask */
1188 FALSE), /* pcrel_offset */
1189
1190 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1191 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1192 0, /* rightshift */
1193 1, /* size (0 = byte, 1 = short, 2 = long) */
1194 16, /* bitsize */
1195 FALSE, /* pc_relative */
1196 0, /* bitpos */
1197 complain_overflow_dont, /* complain_on_overflow */
1198 ppc64_elf_unhandled_reloc, /* special_function */
1199 "R_PPC64_PLT16_LO_DS", /* name */
1200 FALSE, /* partial_inplace */
1201 0, /* src_mask */
1202 0xfffc, /* dst_mask */
1203 FALSE), /* pcrel_offset */
1204
1205 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1206 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1207 0, /* rightshift */
1208 1, /* size (0 = byte, 1 = short, 2 = long) */
1209 16, /* bitsize */
1210 FALSE, /* pc_relative */
1211 0, /* bitpos */
1212 complain_overflow_signed, /* complain_on_overflow */
1213 ppc64_elf_sectoff_reloc, /* special_function */
1214 "R_PPC64_SECTOFF_DS", /* name */
1215 FALSE, /* partial_inplace */
1216 0, /* src_mask */
1217 0xfffc, /* dst_mask */
1218 FALSE), /* pcrel_offset */
1219
1220 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1221 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1222 0, /* rightshift */
1223 1, /* size (0 = byte, 1 = short, 2 = long) */
1224 16, /* bitsize */
1225 FALSE, /* pc_relative */
1226 0, /* bitpos */
1227 complain_overflow_dont, /* complain_on_overflow */
1228 ppc64_elf_sectoff_reloc, /* special_function */
1229 "R_PPC64_SECTOFF_LO_DS",/* name */
1230 FALSE, /* partial_inplace */
1231 0, /* src_mask */
1232 0xfffc, /* dst_mask */
1233 FALSE), /* pcrel_offset */
1234
1235 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1236 HOWTO (R_PPC64_TOC16_DS, /* type */
1237 0, /* rightshift */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1239 16, /* bitsize */
1240 FALSE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_signed, /* complain_on_overflow */
1243 ppc64_elf_toc_reloc, /* special_function */
1244 "R_PPC64_TOC16_DS", /* name */
1245 FALSE, /* partial_inplace */
1246 0, /* src_mask */
1247 0xfffc, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1249
1250 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1251 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1252 0, /* rightshift */
1253 1, /* size (0 = byte, 1 = short, 2 = long) */
1254 16, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 ppc64_elf_toc_reloc, /* special_function */
1259 "R_PPC64_TOC16_LO_DS", /* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 0xfffc, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1266 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1267 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1268 0, /* rightshift */
1269 1, /* size (0 = byte, 1 = short, 2 = long) */
1270 16, /* bitsize */
1271 FALSE, /* pc_relative */
1272 0, /* bitpos */
1273 complain_overflow_signed, /* complain_on_overflow */
1274 ppc64_elf_unhandled_reloc, /* special_function */
1275 "R_PPC64_PLTGOT16_DS", /* name */
1276 FALSE, /* partial_inplace */
1277 0, /* src_mask */
1278 0xfffc, /* dst_mask */
1279 FALSE), /* pcrel_offset */
1280
1281 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1282 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1283 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1284 0, /* rightshift */
1285 1, /* size (0 = byte, 1 = short, 2 = long) */
1286 16, /* bitsize */
1287 FALSE, /* pc_relative */
1288 0, /* bitpos */
1289 complain_overflow_dont, /* complain_on_overflow */
1290 ppc64_elf_unhandled_reloc, /* special_function */
1291 "R_PPC64_PLTGOT16_LO_DS",/* name */
1292 FALSE, /* partial_inplace */
1293 0, /* src_mask */
1294 0xfffc, /* dst_mask */
1295 FALSE), /* pcrel_offset */
1296
1297 /* Marker relocs for TLS. */
1298 HOWTO (R_PPC64_TLS,
1299 0, /* rightshift */
1300 2, /* size (0 = byte, 1 = short, 2 = long) */
1301 32, /* bitsize */
1302 FALSE, /* pc_relative */
1303 0, /* bitpos */
1304 complain_overflow_dont, /* complain_on_overflow */
1305 bfd_elf_generic_reloc, /* special_function */
1306 "R_PPC64_TLS", /* name */
1307 FALSE, /* partial_inplace */
1308 0, /* src_mask */
1309 0, /* dst_mask */
1310 FALSE), /* pcrel_offset */
1311
1312 HOWTO (R_PPC64_TLSGD,
1313 0, /* rightshift */
1314 2, /* size (0 = byte, 1 = short, 2 = long) */
1315 32, /* bitsize */
1316 FALSE, /* pc_relative */
1317 0, /* bitpos */
1318 complain_overflow_dont, /* complain_on_overflow */
1319 bfd_elf_generic_reloc, /* special_function */
1320 "R_PPC64_TLSGD", /* name */
1321 FALSE, /* partial_inplace */
1322 0, /* src_mask */
1323 0, /* dst_mask */
1324 FALSE), /* pcrel_offset */
1325
1326 HOWTO (R_PPC64_TLSLD,
1327 0, /* rightshift */
1328 2, /* size (0 = byte, 1 = short, 2 = long) */
1329 32, /* bitsize */
1330 FALSE, /* pc_relative */
1331 0, /* bitpos */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 bfd_elf_generic_reloc, /* special_function */
1334 "R_PPC64_TLSLD", /* name */
1335 FALSE, /* partial_inplace */
1336 0, /* src_mask */
1337 0, /* dst_mask */
1338 FALSE), /* pcrel_offset */
1339
1340 /* Marker reloc for optimizing r2 save in prologue rather than on
1341 each plt call stub. */
1342 HOWTO (R_PPC64_TOCSAVE,
1343 0, /* rightshift */
1344 2, /* size (0 = byte, 1 = short, 2 = long) */
1345 32, /* bitsize */
1346 FALSE, /* pc_relative */
1347 0, /* bitpos */
1348 complain_overflow_dont, /* complain_on_overflow */
1349 bfd_elf_generic_reloc, /* special_function */
1350 "R_PPC64_TOCSAVE", /* name */
1351 FALSE, /* partial_inplace */
1352 0, /* src_mask */
1353 0, /* dst_mask */
1354 FALSE), /* pcrel_offset */
1355
1356 /* Marker relocs on inline plt call instructions. */
1357 HOWTO (R_PPC64_PLTSEQ,
1358 0, /* rightshift */
1359 2, /* size (0 = byte, 1 = short, 2 = long) */
1360 32, /* bitsize */
1361 FALSE, /* pc_relative */
1362 0, /* bitpos */
1363 complain_overflow_dont, /* complain_on_overflow */
1364 bfd_elf_generic_reloc, /* special_function */
1365 "R_PPC64_PLTSEQ", /* name */
1366 FALSE, /* partial_inplace */
1367 0, /* src_mask */
1368 0, /* dst_mask */
1369 FALSE), /* pcrel_offset */
1370
1371 HOWTO (R_PPC64_PLTCALL,
1372 0, /* rightshift */
1373 2, /* size (0 = byte, 1 = short, 2 = long) */
1374 32, /* bitsize */
1375 FALSE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 bfd_elf_generic_reloc, /* special_function */
1379 "R_PPC64_PLTCALL", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* Computes the load module index of the load module that contains the
1386 definition of its TLS sym. */
1387 HOWTO (R_PPC64_DTPMOD64,
1388 0, /* rightshift */
1389 4, /* size (0 = byte, 1 = short, 2 = long) */
1390 64, /* bitsize */
1391 FALSE, /* pc_relative */
1392 0, /* bitpos */
1393 complain_overflow_dont, /* complain_on_overflow */
1394 ppc64_elf_unhandled_reloc, /* special_function */
1395 "R_PPC64_DTPMOD64", /* name */
1396 FALSE, /* partial_inplace */
1397 0, /* src_mask */
1398 ONES (64), /* dst_mask */
1399 FALSE), /* pcrel_offset */
1400
1401 /* Computes a dtv-relative displacement, the difference between the value
1402 of sym+add and the base address of the thread-local storage block that
1403 contains the definition of sym, minus 0x8000. */
1404 HOWTO (R_PPC64_DTPREL64,
1405 0, /* rightshift */
1406 4, /* size (0 = byte, 1 = short, 2 = long) */
1407 64, /* bitsize */
1408 FALSE, /* pc_relative */
1409 0, /* bitpos */
1410 complain_overflow_dont, /* complain_on_overflow */
1411 ppc64_elf_unhandled_reloc, /* special_function */
1412 "R_PPC64_DTPREL64", /* name */
1413 FALSE, /* partial_inplace */
1414 0, /* src_mask */
1415 ONES (64), /* dst_mask */
1416 FALSE), /* pcrel_offset */
1417
1418 /* A 16 bit dtprel reloc. */
1419 HOWTO (R_PPC64_DTPREL16,
1420 0, /* rightshift */
1421 1, /* size (0 = byte, 1 = short, 2 = long) */
1422 16, /* bitsize */
1423 FALSE, /* pc_relative */
1424 0, /* bitpos */
1425 complain_overflow_signed, /* complain_on_overflow */
1426 ppc64_elf_unhandled_reloc, /* special_function */
1427 "R_PPC64_DTPREL16", /* name */
1428 FALSE, /* partial_inplace */
1429 0, /* src_mask */
1430 0xffff, /* dst_mask */
1431 FALSE), /* pcrel_offset */
1432
1433 /* Like DTPREL16, but no overflow. */
1434 HOWTO (R_PPC64_DTPREL16_LO,
1435 0, /* rightshift */
1436 1, /* size (0 = byte, 1 = short, 2 = long) */
1437 16, /* bitsize */
1438 FALSE, /* pc_relative */
1439 0, /* bitpos */
1440 complain_overflow_dont, /* complain_on_overflow */
1441 ppc64_elf_unhandled_reloc, /* special_function */
1442 "R_PPC64_DTPREL16_LO", /* name */
1443 FALSE, /* partial_inplace */
1444 0, /* src_mask */
1445 0xffff, /* dst_mask */
1446 FALSE), /* pcrel_offset */
1447
1448 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1449 HOWTO (R_PPC64_DTPREL16_HI,
1450 16, /* rightshift */
1451 1, /* size (0 = byte, 1 = short, 2 = long) */
1452 16, /* bitsize */
1453 FALSE, /* pc_relative */
1454 0, /* bitpos */
1455 complain_overflow_signed, /* complain_on_overflow */
1456 ppc64_elf_unhandled_reloc, /* special_function */
1457 "R_PPC64_DTPREL16_HI", /* name */
1458 FALSE, /* partial_inplace */
1459 0, /* src_mask */
1460 0xffff, /* dst_mask */
1461 FALSE), /* pcrel_offset */
1462
1463 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1464 HOWTO (R_PPC64_DTPREL16_HA,
1465 16, /* rightshift */
1466 1, /* size (0 = byte, 1 = short, 2 = long) */
1467 16, /* bitsize */
1468 FALSE, /* pc_relative */
1469 0, /* bitpos */
1470 complain_overflow_signed, /* complain_on_overflow */
1471 ppc64_elf_unhandled_reloc, /* special_function */
1472 "R_PPC64_DTPREL16_HA", /* name */
1473 FALSE, /* partial_inplace */
1474 0, /* src_mask */
1475 0xffff, /* dst_mask */
1476 FALSE), /* pcrel_offset */
1477
1478 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1479 HOWTO (R_PPC64_DTPREL16_HIGHER,
1480 32, /* rightshift */
1481 1, /* size (0 = byte, 1 = short, 2 = long) */
1482 16, /* bitsize */
1483 FALSE, /* pc_relative */
1484 0, /* bitpos */
1485 complain_overflow_dont, /* complain_on_overflow */
1486 ppc64_elf_unhandled_reloc, /* special_function */
1487 "R_PPC64_DTPREL16_HIGHER", /* name */
1488 FALSE, /* partial_inplace */
1489 0, /* src_mask */
1490 0xffff, /* dst_mask */
1491 FALSE), /* pcrel_offset */
1492
1493 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1494 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1495 32, /* rightshift */
1496 1, /* size (0 = byte, 1 = short, 2 = long) */
1497 16, /* bitsize */
1498 FALSE, /* pc_relative */
1499 0, /* bitpos */
1500 complain_overflow_dont, /* complain_on_overflow */
1501 ppc64_elf_unhandled_reloc, /* special_function */
1502 "R_PPC64_DTPREL16_HIGHERA", /* name */
1503 FALSE, /* partial_inplace */
1504 0, /* src_mask */
1505 0xffff, /* dst_mask */
1506 FALSE), /* pcrel_offset */
1507
1508 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1509 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1510 48, /* rightshift */
1511 1, /* size (0 = byte, 1 = short, 2 = long) */
1512 16, /* bitsize */
1513 FALSE, /* pc_relative */
1514 0, /* bitpos */
1515 complain_overflow_dont, /* complain_on_overflow */
1516 ppc64_elf_unhandled_reloc, /* special_function */
1517 "R_PPC64_DTPREL16_HIGHEST", /* name */
1518 FALSE, /* partial_inplace */
1519 0, /* src_mask */
1520 0xffff, /* dst_mask */
1521 FALSE), /* pcrel_offset */
1522
1523 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1524 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1525 48, /* rightshift */
1526 1, /* size (0 = byte, 1 = short, 2 = long) */
1527 16, /* bitsize */
1528 FALSE, /* pc_relative */
1529 0, /* bitpos */
1530 complain_overflow_dont, /* complain_on_overflow */
1531 ppc64_elf_unhandled_reloc, /* special_function */
1532 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1533 FALSE, /* partial_inplace */
1534 0, /* src_mask */
1535 0xffff, /* dst_mask */
1536 FALSE), /* pcrel_offset */
1537
1538 /* Like DTPREL16, but for insns with a DS field. */
1539 HOWTO (R_PPC64_DTPREL16_DS,
1540 0, /* rightshift */
1541 1, /* size (0 = byte, 1 = short, 2 = long) */
1542 16, /* bitsize */
1543 FALSE, /* pc_relative */
1544 0, /* bitpos */
1545 complain_overflow_signed, /* complain_on_overflow */
1546 ppc64_elf_unhandled_reloc, /* special_function */
1547 "R_PPC64_DTPREL16_DS", /* name */
1548 FALSE, /* partial_inplace */
1549 0, /* src_mask */
1550 0xfffc, /* dst_mask */
1551 FALSE), /* pcrel_offset */
1552
1553 /* Like DTPREL16_DS, but no overflow. */
1554 HOWTO (R_PPC64_DTPREL16_LO_DS,
1555 0, /* rightshift */
1556 1, /* size (0 = byte, 1 = short, 2 = long) */
1557 16, /* bitsize */
1558 FALSE, /* pc_relative */
1559 0, /* bitpos */
1560 complain_overflow_dont, /* complain_on_overflow */
1561 ppc64_elf_unhandled_reloc, /* special_function */
1562 "R_PPC64_DTPREL16_LO_DS", /* name */
1563 FALSE, /* partial_inplace */
1564 0, /* src_mask */
1565 0xfffc, /* dst_mask */
1566 FALSE), /* pcrel_offset */
1567
1568 /* Computes a tp-relative displacement, the difference between the value of
1569 sym+add and the value of the thread pointer (r13). */
1570 HOWTO (R_PPC64_TPREL64,
1571 0, /* rightshift */
1572 4, /* size (0 = byte, 1 = short, 2 = long) */
1573 64, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 ppc64_elf_unhandled_reloc, /* special_function */
1578 "R_PPC64_TPREL64", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 ONES (64), /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* A 16 bit tprel reloc. */
1585 HOWTO (R_PPC64_TPREL16,
1586 0, /* rightshift */
1587 1, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_signed, /* complain_on_overflow */
1592 ppc64_elf_unhandled_reloc, /* special_function */
1593 "R_PPC64_TPREL16", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0xffff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Like TPREL16, but no overflow. */
1600 HOWTO (R_PPC64_TPREL16_LO,
1601 0, /* rightshift */
1602 1, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 ppc64_elf_unhandled_reloc, /* special_function */
1608 "R_PPC64_TPREL16_LO", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0xffff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Like TPREL16_LO, but next higher group of 16 bits. */
1615 HOWTO (R_PPC64_TPREL16_HI,
1616 16, /* rightshift */
1617 1, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_signed, /* complain_on_overflow */
1622 ppc64_elf_unhandled_reloc, /* special_function */
1623 "R_PPC64_TPREL16_HI", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0xffff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Like TPREL16_HI, but adjust for low 16 bits. */
1630 HOWTO (R_PPC64_TPREL16_HA,
1631 16, /* rightshift */
1632 1, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_signed, /* complain_on_overflow */
1637 ppc64_elf_unhandled_reloc, /* special_function */
1638 "R_PPC64_TPREL16_HA", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0xffff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Like TPREL16_HI, but next higher group of 16 bits. */
1645 HOWTO (R_PPC64_TPREL16_HIGHER,
1646 32, /* rightshift */
1647 1, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 ppc64_elf_unhandled_reloc, /* special_function */
1653 "R_PPC64_TPREL16_HIGHER", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0xffff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1660 HOWTO (R_PPC64_TPREL16_HIGHERA,
1661 32, /* rightshift */
1662 1, /* size (0 = byte, 1 = short, 2 = long) */
1663 16, /* bitsize */
1664 FALSE, /* pc_relative */
1665 0, /* bitpos */
1666 complain_overflow_dont, /* complain_on_overflow */
1667 ppc64_elf_unhandled_reloc, /* special_function */
1668 "R_PPC64_TPREL16_HIGHERA", /* name */
1669 FALSE, /* partial_inplace */
1670 0, /* src_mask */
1671 0xffff, /* dst_mask */
1672 FALSE), /* pcrel_offset */
1673
1674 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1675 HOWTO (R_PPC64_TPREL16_HIGHEST,
1676 48, /* rightshift */
1677 1, /* size (0 = byte, 1 = short, 2 = long) */
1678 16, /* bitsize */
1679 FALSE, /* pc_relative */
1680 0, /* bitpos */
1681 complain_overflow_dont, /* complain_on_overflow */
1682 ppc64_elf_unhandled_reloc, /* special_function */
1683 "R_PPC64_TPREL16_HIGHEST", /* name */
1684 FALSE, /* partial_inplace */
1685 0, /* src_mask */
1686 0xffff, /* dst_mask */
1687 FALSE), /* pcrel_offset */
1688
1689 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1690 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1691 48, /* rightshift */
1692 1, /* size (0 = byte, 1 = short, 2 = long) */
1693 16, /* bitsize */
1694 FALSE, /* pc_relative */
1695 0, /* bitpos */
1696 complain_overflow_dont, /* complain_on_overflow */
1697 ppc64_elf_unhandled_reloc, /* special_function */
1698 "R_PPC64_TPREL16_HIGHESTA", /* name */
1699 FALSE, /* partial_inplace */
1700 0, /* src_mask */
1701 0xffff, /* dst_mask */
1702 FALSE), /* pcrel_offset */
1703
1704 /* Like TPREL16, but for insns with a DS field. */
1705 HOWTO (R_PPC64_TPREL16_DS,
1706 0, /* rightshift */
1707 1, /* size (0 = byte, 1 = short, 2 = long) */
1708 16, /* bitsize */
1709 FALSE, /* pc_relative */
1710 0, /* bitpos */
1711 complain_overflow_signed, /* complain_on_overflow */
1712 ppc64_elf_unhandled_reloc, /* special_function */
1713 "R_PPC64_TPREL16_DS", /* name */
1714 FALSE, /* partial_inplace */
1715 0, /* src_mask */
1716 0xfffc, /* dst_mask */
1717 FALSE), /* pcrel_offset */
1718
1719 /* Like TPREL16_DS, but no overflow. */
1720 HOWTO (R_PPC64_TPREL16_LO_DS,
1721 0, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 FALSE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc64_elf_unhandled_reloc, /* special_function */
1728 "R_PPC64_TPREL16_LO_DS", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xfffc, /* dst_mask */
1732 FALSE), /* pcrel_offset */
1733
1734 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1735 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1736 to the first entry relative to the TOC base (r2). */
1737 HOWTO (R_PPC64_GOT_TLSGD16,
1738 0, /* rightshift */
1739 1, /* size (0 = byte, 1 = short, 2 = long) */
1740 16, /* bitsize */
1741 FALSE, /* pc_relative */
1742 0, /* bitpos */
1743 complain_overflow_signed, /* complain_on_overflow */
1744 ppc64_elf_unhandled_reloc, /* special_function */
1745 "R_PPC64_GOT_TLSGD16", /* name */
1746 FALSE, /* partial_inplace */
1747 0, /* src_mask */
1748 0xffff, /* dst_mask */
1749 FALSE), /* pcrel_offset */
1750
1751 /* Like GOT_TLSGD16, but no overflow. */
1752 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1753 0, /* rightshift */
1754 1, /* size (0 = byte, 1 = short, 2 = long) */
1755 16, /* bitsize */
1756 FALSE, /* pc_relative */
1757 0, /* bitpos */
1758 complain_overflow_dont, /* complain_on_overflow */
1759 ppc64_elf_unhandled_reloc, /* special_function */
1760 "R_PPC64_GOT_TLSGD16_LO", /* name */
1761 FALSE, /* partial_inplace */
1762 0, /* src_mask */
1763 0xffff, /* dst_mask */
1764 FALSE), /* pcrel_offset */
1765
1766 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1767 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1768 16, /* rightshift */
1769 1, /* size (0 = byte, 1 = short, 2 = long) */
1770 16, /* bitsize */
1771 FALSE, /* pc_relative */
1772 0, /* bitpos */
1773 complain_overflow_signed, /* complain_on_overflow */
1774 ppc64_elf_unhandled_reloc, /* special_function */
1775 "R_PPC64_GOT_TLSGD16_HI", /* name */
1776 FALSE, /* partial_inplace */
1777 0, /* src_mask */
1778 0xffff, /* dst_mask */
1779 FALSE), /* pcrel_offset */
1780
1781 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1782 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1783 16, /* rightshift */
1784 1, /* size (0 = byte, 1 = short, 2 = long) */
1785 16, /* bitsize */
1786 FALSE, /* pc_relative */
1787 0, /* bitpos */
1788 complain_overflow_signed, /* complain_on_overflow */
1789 ppc64_elf_unhandled_reloc, /* special_function */
1790 "R_PPC64_GOT_TLSGD16_HA", /* name */
1791 FALSE, /* partial_inplace */
1792 0, /* src_mask */
1793 0xffff, /* dst_mask */
1794 FALSE), /* pcrel_offset */
1795
1796 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1797 with values (sym+add)@dtpmod and zero, and computes the offset to the
1798 first entry relative to the TOC base (r2). */
1799 HOWTO (R_PPC64_GOT_TLSLD16,
1800 0, /* rightshift */
1801 1, /* size (0 = byte, 1 = short, 2 = long) */
1802 16, /* bitsize */
1803 FALSE, /* pc_relative */
1804 0, /* bitpos */
1805 complain_overflow_signed, /* complain_on_overflow */
1806 ppc64_elf_unhandled_reloc, /* special_function */
1807 "R_PPC64_GOT_TLSLD16", /* name */
1808 FALSE, /* partial_inplace */
1809 0, /* src_mask */
1810 0xffff, /* dst_mask */
1811 FALSE), /* pcrel_offset */
1812
1813 /* Like GOT_TLSLD16, but no overflow. */
1814 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1815 0, /* rightshift */
1816 1, /* size (0 = byte, 1 = short, 2 = long) */
1817 16, /* bitsize */
1818 FALSE, /* pc_relative */
1819 0, /* bitpos */
1820 complain_overflow_dont, /* complain_on_overflow */
1821 ppc64_elf_unhandled_reloc, /* special_function */
1822 "R_PPC64_GOT_TLSLD16_LO", /* name */
1823 FALSE, /* partial_inplace */
1824 0, /* src_mask */
1825 0xffff, /* dst_mask */
1826 FALSE), /* pcrel_offset */
1827
1828 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1829 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1830 16, /* rightshift */
1831 1, /* size (0 = byte, 1 = short, 2 = long) */
1832 16, /* bitsize */
1833 FALSE, /* pc_relative */
1834 0, /* bitpos */
1835 complain_overflow_signed, /* complain_on_overflow */
1836 ppc64_elf_unhandled_reloc, /* special_function */
1837 "R_PPC64_GOT_TLSLD16_HI", /* name */
1838 FALSE, /* partial_inplace */
1839 0, /* src_mask */
1840 0xffff, /* dst_mask */
1841 FALSE), /* pcrel_offset */
1842
1843 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1844 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1845 16, /* rightshift */
1846 1, /* size (0 = byte, 1 = short, 2 = long) */
1847 16, /* bitsize */
1848 FALSE, /* pc_relative */
1849 0, /* bitpos */
1850 complain_overflow_signed, /* complain_on_overflow */
1851 ppc64_elf_unhandled_reloc, /* special_function */
1852 "R_PPC64_GOT_TLSLD16_HA", /* name */
1853 FALSE, /* partial_inplace */
1854 0, /* src_mask */
1855 0xffff, /* dst_mask */
1856 FALSE), /* pcrel_offset */
1857
1858 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1859 the offset to the entry relative to the TOC base (r2). */
1860 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1861 0, /* rightshift */
1862 1, /* size (0 = byte, 1 = short, 2 = long) */
1863 16, /* bitsize */
1864 FALSE, /* pc_relative */
1865 0, /* bitpos */
1866 complain_overflow_signed, /* complain_on_overflow */
1867 ppc64_elf_unhandled_reloc, /* special_function */
1868 "R_PPC64_GOT_DTPREL16_DS", /* name */
1869 FALSE, /* partial_inplace */
1870 0, /* src_mask */
1871 0xfffc, /* dst_mask */
1872 FALSE), /* pcrel_offset */
1873
1874 /* Like GOT_DTPREL16_DS, but no overflow. */
1875 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1876 0, /* rightshift */
1877 1, /* size (0 = byte, 1 = short, 2 = long) */
1878 16, /* bitsize */
1879 FALSE, /* pc_relative */
1880 0, /* bitpos */
1881 complain_overflow_dont, /* complain_on_overflow */
1882 ppc64_elf_unhandled_reloc, /* special_function */
1883 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1884 FALSE, /* partial_inplace */
1885 0, /* src_mask */
1886 0xfffc, /* dst_mask */
1887 FALSE), /* pcrel_offset */
1888
1889 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1890 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1891 16, /* rightshift */
1892 1, /* size (0 = byte, 1 = short, 2 = long) */
1893 16, /* bitsize */
1894 FALSE, /* pc_relative */
1895 0, /* bitpos */
1896 complain_overflow_signed, /* complain_on_overflow */
1897 ppc64_elf_unhandled_reloc, /* special_function */
1898 "R_PPC64_GOT_DTPREL16_HI", /* name */
1899 FALSE, /* partial_inplace */
1900 0, /* src_mask */
1901 0xffff, /* dst_mask */
1902 FALSE), /* pcrel_offset */
1903
1904 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1905 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1906 16, /* rightshift */
1907 1, /* size (0 = byte, 1 = short, 2 = long) */
1908 16, /* bitsize */
1909 FALSE, /* pc_relative */
1910 0, /* bitpos */
1911 complain_overflow_signed, /* complain_on_overflow */
1912 ppc64_elf_unhandled_reloc, /* special_function */
1913 "R_PPC64_GOT_DTPREL16_HA", /* name */
1914 FALSE, /* partial_inplace */
1915 0, /* src_mask */
1916 0xffff, /* dst_mask */
1917 FALSE), /* pcrel_offset */
1918
1919 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1920 offset to the entry relative to the TOC base (r2). */
1921 HOWTO (R_PPC64_GOT_TPREL16_DS,
1922 0, /* rightshift */
1923 1, /* size (0 = byte, 1 = short, 2 = long) */
1924 16, /* bitsize */
1925 FALSE, /* pc_relative */
1926 0, /* bitpos */
1927 complain_overflow_signed, /* complain_on_overflow */
1928 ppc64_elf_unhandled_reloc, /* special_function */
1929 "R_PPC64_GOT_TPREL16_DS", /* name */
1930 FALSE, /* partial_inplace */
1931 0, /* src_mask */
1932 0xfffc, /* dst_mask */
1933 FALSE), /* pcrel_offset */
1934
1935 /* Like GOT_TPREL16_DS, but no overflow. */
1936 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1937 0, /* rightshift */
1938 1, /* size (0 = byte, 1 = short, 2 = long) */
1939 16, /* bitsize */
1940 FALSE, /* pc_relative */
1941 0, /* bitpos */
1942 complain_overflow_dont, /* complain_on_overflow */
1943 ppc64_elf_unhandled_reloc, /* special_function */
1944 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1945 FALSE, /* partial_inplace */
1946 0, /* src_mask */
1947 0xfffc, /* dst_mask */
1948 FALSE), /* pcrel_offset */
1949
1950 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1951 HOWTO (R_PPC64_GOT_TPREL16_HI,
1952 16, /* rightshift */
1953 1, /* size (0 = byte, 1 = short, 2 = long) */
1954 16, /* bitsize */
1955 FALSE, /* pc_relative */
1956 0, /* bitpos */
1957 complain_overflow_signed, /* complain_on_overflow */
1958 ppc64_elf_unhandled_reloc, /* special_function */
1959 "R_PPC64_GOT_TPREL16_HI", /* name */
1960 FALSE, /* partial_inplace */
1961 0, /* src_mask */
1962 0xffff, /* dst_mask */
1963 FALSE), /* pcrel_offset */
1964
1965 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1966 HOWTO (R_PPC64_GOT_TPREL16_HA,
1967 16, /* rightshift */
1968 1, /* size (0 = byte, 1 = short, 2 = long) */
1969 16, /* bitsize */
1970 FALSE, /* pc_relative */
1971 0, /* bitpos */
1972 complain_overflow_signed, /* complain_on_overflow */
1973 ppc64_elf_unhandled_reloc, /* special_function */
1974 "R_PPC64_GOT_TPREL16_HA", /* name */
1975 FALSE, /* partial_inplace */
1976 0, /* src_mask */
1977 0xffff, /* dst_mask */
1978 FALSE), /* pcrel_offset */
1979
1980 HOWTO (R_PPC64_JMP_IREL, /* type */
1981 0, /* rightshift */
1982 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1983 0, /* bitsize */
1984 FALSE, /* pc_relative */
1985 0, /* bitpos */
1986 complain_overflow_dont, /* complain_on_overflow */
1987 ppc64_elf_unhandled_reloc, /* special_function */
1988 "R_PPC64_JMP_IREL", /* name */
1989 FALSE, /* partial_inplace */
1990 0, /* src_mask */
1991 0, /* dst_mask */
1992 FALSE), /* pcrel_offset */
1993
1994 HOWTO (R_PPC64_IRELATIVE, /* type */
1995 0, /* rightshift */
1996 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1997 64, /* bitsize */
1998 FALSE, /* pc_relative */
1999 0, /* bitpos */
2000 complain_overflow_dont, /* complain_on_overflow */
2001 bfd_elf_generic_reloc, /* special_function */
2002 "R_PPC64_IRELATIVE", /* name */
2003 FALSE, /* partial_inplace */
2004 0, /* src_mask */
2005 ONES (64), /* dst_mask */
2006 FALSE), /* pcrel_offset */
2007
2008 /* A 16 bit relative relocation. */
2009 HOWTO (R_PPC64_REL16, /* type */
2010 0, /* rightshift */
2011 1, /* size (0 = byte, 1 = short, 2 = long) */
2012 16, /* bitsize */
2013 TRUE, /* pc_relative */
2014 0, /* bitpos */
2015 complain_overflow_signed, /* complain_on_overflow */
2016 bfd_elf_generic_reloc, /* special_function */
2017 "R_PPC64_REL16", /* name */
2018 FALSE, /* partial_inplace */
2019 0, /* src_mask */
2020 0xffff, /* dst_mask */
2021 TRUE), /* pcrel_offset */
2022
2023 /* A 16 bit relative relocation without overflow. */
2024 HOWTO (R_PPC64_REL16_LO, /* type */
2025 0, /* rightshift */
2026 1, /* size (0 = byte, 1 = short, 2 = long) */
2027 16, /* bitsize */
2028 TRUE, /* pc_relative */
2029 0, /* bitpos */
2030 complain_overflow_dont,/* complain_on_overflow */
2031 bfd_elf_generic_reloc, /* special_function */
2032 "R_PPC64_REL16_LO", /* name */
2033 FALSE, /* partial_inplace */
2034 0, /* src_mask */
2035 0xffff, /* dst_mask */
2036 TRUE), /* pcrel_offset */
2037
2038 /* The high order 16 bits of a relative address. */
2039 HOWTO (R_PPC64_REL16_HI, /* type */
2040 16, /* rightshift */
2041 1, /* size (0 = byte, 1 = short, 2 = long) */
2042 16, /* bitsize */
2043 TRUE, /* pc_relative */
2044 0, /* bitpos */
2045 complain_overflow_signed, /* complain_on_overflow */
2046 bfd_elf_generic_reloc, /* special_function */
2047 "R_PPC64_REL16_HI", /* name */
2048 FALSE, /* partial_inplace */
2049 0, /* src_mask */
2050 0xffff, /* dst_mask */
2051 TRUE), /* pcrel_offset */
2052
2053 /* The high order 16 bits of a relative address, plus 1 if the contents of
2054 the low 16 bits, treated as a signed number, is negative. */
2055 HOWTO (R_PPC64_REL16_HA, /* type */
2056 16, /* rightshift */
2057 1, /* size (0 = byte, 1 = short, 2 = long) */
2058 16, /* bitsize */
2059 TRUE, /* pc_relative */
2060 0, /* bitpos */
2061 complain_overflow_signed, /* complain_on_overflow */
2062 ppc64_elf_ha_reloc, /* special_function */
2063 "R_PPC64_REL16_HA", /* name */
2064 FALSE, /* partial_inplace */
2065 0, /* src_mask */
2066 0xffff, /* dst_mask */
2067 TRUE), /* pcrel_offset */
2068
2069 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2070 HOWTO (R_PPC64_REL16DX_HA, /* type */
2071 16, /* rightshift */
2072 2, /* size (0 = byte, 1 = short, 2 = long) */
2073 16, /* bitsize */
2074 TRUE, /* pc_relative */
2075 0, /* bitpos */
2076 complain_overflow_signed, /* complain_on_overflow */
2077 ppc64_elf_ha_reloc, /* special_function */
2078 "R_PPC64_REL16DX_HA", /* name */
2079 FALSE, /* partial_inplace */
2080 0, /* src_mask */
2081 0x1fffc1, /* dst_mask */
2082 TRUE), /* pcrel_offset */
2083
2084 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2085 HOWTO (R_PPC64_16DX_HA, /* type */
2086 16, /* rightshift */
2087 2, /* size (0 = byte, 1 = short, 2 = long) */
2088 16, /* bitsize */
2089 FALSE, /* pc_relative */
2090 0, /* bitpos */
2091 complain_overflow_signed, /* complain_on_overflow */
2092 ppc64_elf_ha_reloc, /* special_function */
2093 "R_PPC64_16DX_HA", /* name */
2094 FALSE, /* partial_inplace */
2095 0, /* src_mask */
2096 0x1fffc1, /* dst_mask */
2097 FALSE), /* pcrel_offset */
2098
2099 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2100 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2101 16, /* rightshift */
2102 1, /* size (0 = byte, 1 = short, 2 = long) */
2103 16, /* bitsize */
2104 FALSE, /* pc_relative */
2105 0, /* bitpos */
2106 complain_overflow_dont, /* complain_on_overflow */
2107 bfd_elf_generic_reloc, /* special_function */
2108 "R_PPC64_ADDR16_HIGH", /* name */
2109 FALSE, /* partial_inplace */
2110 0, /* src_mask */
2111 0xffff, /* dst_mask */
2112 FALSE), /* pcrel_offset */
2113
2114 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2115 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2116 16, /* rightshift */
2117 1, /* size (0 = byte, 1 = short, 2 = long) */
2118 16, /* bitsize */
2119 FALSE, /* pc_relative */
2120 0, /* bitpos */
2121 complain_overflow_dont, /* complain_on_overflow */
2122 ppc64_elf_ha_reloc, /* special_function */
2123 "R_PPC64_ADDR16_HIGHA", /* name */
2124 FALSE, /* partial_inplace */
2125 0, /* src_mask */
2126 0xffff, /* dst_mask */
2127 FALSE), /* pcrel_offset */
2128
2129 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2130 HOWTO (R_PPC64_DTPREL16_HIGH,
2131 16, /* rightshift */
2132 1, /* size (0 = byte, 1 = short, 2 = long) */
2133 16, /* bitsize */
2134 FALSE, /* pc_relative */
2135 0, /* bitpos */
2136 complain_overflow_dont, /* complain_on_overflow */
2137 ppc64_elf_unhandled_reloc, /* special_function */
2138 "R_PPC64_DTPREL16_HIGH", /* name */
2139 FALSE, /* partial_inplace */
2140 0, /* src_mask */
2141 0xffff, /* dst_mask */
2142 FALSE), /* pcrel_offset */
2143
2144 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2145 HOWTO (R_PPC64_DTPREL16_HIGHA,
2146 16, /* rightshift */
2147 1, /* size (0 = byte, 1 = short, 2 = long) */
2148 16, /* bitsize */
2149 FALSE, /* pc_relative */
2150 0, /* bitpos */
2151 complain_overflow_dont, /* complain_on_overflow */
2152 ppc64_elf_unhandled_reloc, /* special_function */
2153 "R_PPC64_DTPREL16_HIGHA", /* name */
2154 FALSE, /* partial_inplace */
2155 0, /* src_mask */
2156 0xffff, /* dst_mask */
2157 FALSE), /* pcrel_offset */
2158
2159 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2160 HOWTO (R_PPC64_TPREL16_HIGH,
2161 16, /* rightshift */
2162 1, /* size (0 = byte, 1 = short, 2 = long) */
2163 16, /* bitsize */
2164 FALSE, /* pc_relative */
2165 0, /* bitpos */
2166 complain_overflow_dont, /* complain_on_overflow */
2167 ppc64_elf_unhandled_reloc, /* special_function */
2168 "R_PPC64_TPREL16_HIGH", /* name */
2169 FALSE, /* partial_inplace */
2170 0, /* src_mask */
2171 0xffff, /* dst_mask */
2172 FALSE), /* pcrel_offset */
2173
2174 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2175 HOWTO (R_PPC64_TPREL16_HIGHA,
2176 16, /* rightshift */
2177 1, /* size (0 = byte, 1 = short, 2 = long) */
2178 16, /* bitsize */
2179 FALSE, /* pc_relative */
2180 0, /* bitpos */
2181 complain_overflow_dont, /* complain_on_overflow */
2182 ppc64_elf_unhandled_reloc, /* special_function */
2183 "R_PPC64_TPREL16_HIGHA", /* name */
2184 FALSE, /* partial_inplace */
2185 0, /* src_mask */
2186 0xffff, /* dst_mask */
2187 FALSE), /* pcrel_offset */
2188
2189 /* Marker reloc on ELFv2 large-model function entry. */
2190 HOWTO (R_PPC64_ENTRY,
2191 0, /* rightshift */
2192 2, /* size (0 = byte, 1 = short, 2 = long) */
2193 32, /* bitsize */
2194 FALSE, /* pc_relative */
2195 0, /* bitpos */
2196 complain_overflow_dont, /* complain_on_overflow */
2197 bfd_elf_generic_reloc, /* special_function */
2198 "R_PPC64_ENTRY", /* name */
2199 FALSE, /* partial_inplace */
2200 0, /* src_mask */
2201 0, /* dst_mask */
2202 FALSE), /* pcrel_offset */
2203
2204 /* Like ADDR64, but use local entry point of function. */
2205 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2206 0, /* rightshift */
2207 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2208 64, /* bitsize */
2209 FALSE, /* pc_relative */
2210 0, /* bitpos */
2211 complain_overflow_dont, /* complain_on_overflow */
2212 bfd_elf_generic_reloc, /* special_function */
2213 "R_PPC64_ADDR64_LOCAL", /* name */
2214 FALSE, /* partial_inplace */
2215 0, /* src_mask */
2216 ONES (64), /* dst_mask */
2217 FALSE), /* pcrel_offset */
2218
2219 /* GNU extension to record C++ vtable hierarchy. */
2220 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2221 0, /* rightshift */
2222 0, /* size (0 = byte, 1 = short, 2 = long) */
2223 0, /* bitsize */
2224 FALSE, /* pc_relative */
2225 0, /* bitpos */
2226 complain_overflow_dont, /* complain_on_overflow */
2227 NULL, /* special_function */
2228 "R_PPC64_GNU_VTINHERIT", /* name */
2229 FALSE, /* partial_inplace */
2230 0, /* src_mask */
2231 0, /* dst_mask */
2232 FALSE), /* pcrel_offset */
2233
2234 /* GNU extension to record C++ vtable member usage. */
2235 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2236 0, /* rightshift */
2237 0, /* size (0 = byte, 1 = short, 2 = long) */
2238 0, /* bitsize */
2239 FALSE, /* pc_relative */
2240 0, /* bitpos */
2241 complain_overflow_dont, /* complain_on_overflow */
2242 NULL, /* special_function */
2243 "R_PPC64_GNU_VTENTRY", /* name */
2244 FALSE, /* partial_inplace */
2245 0, /* src_mask */
2246 0, /* dst_mask */
2247 FALSE), /* pcrel_offset */
2248 };
2249
2250 \f
2251 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2252 be done. */
2253
2254 static void
2255 ppc_howto_init (void)
2256 {
2257 unsigned int i, type;
2258
2259 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2260 {
2261 type = ppc64_elf_howto_raw[i].type;
2262 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2263 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2264 }
2265 }
2266
2267 static reloc_howto_type *
2268 ppc64_elf_reloc_type_lookup (bfd *abfd,
2269 bfd_reloc_code_real_type code)
2270 {
2271 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2272
2273 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2274 /* Initialize howto table if needed. */
2275 ppc_howto_init ();
2276
2277 switch (code)
2278 {
2279 default:
2280 /* xgettext:c-format */
2281 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
2282 bfd_set_error (bfd_error_bad_value);
2283 return NULL;
2284
2285 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2286 break;
2287 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2288 break;
2289 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2290 break;
2291 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2292 break;
2293 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2294 break;
2295 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2296 break;
2297 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2298 break;
2299 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2300 break;
2301 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2302 break;
2303 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2304 break;
2305 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2306 break;
2307 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2308 break;
2309 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2310 break;
2311 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2312 break;
2313 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2314 break;
2315 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2316 break;
2317 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2318 break;
2319 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2320 break;
2321 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2322 break;
2323 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2324 break;
2325 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2326 break;
2327 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2328 break;
2329 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2330 break;
2331 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2332 break;
2333 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2334 break;
2335 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2336 break;
2337 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2338 break;
2339 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2340 break;
2341 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2342 break;
2343 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2344 break;
2345 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2346 break;
2347 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2348 break;
2349 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2350 break;
2351 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2352 break;
2353 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2354 break;
2355 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2356 break;
2357 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2358 break;
2359 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2360 break;
2361 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2362 break;
2363 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2364 break;
2365 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2366 break;
2367 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2368 break;
2369 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2370 break;
2371 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2372 break;
2373 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2374 break;
2375 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2376 break;
2377 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2378 break;
2379 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2380 break;
2381 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2382 break;
2383 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2384 break;
2385 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2386 break;
2387 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2388 break;
2389 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2390 break;
2391 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2392 break;
2393 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2394 break;
2395 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2396 break;
2397 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2398 break;
2399 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2400 break;
2401 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2402 break;
2403 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2404 break;
2405 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2406 break;
2407 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2408 break;
2409 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2410 break;
2411 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2412 break;
2413 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2414 break;
2415 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2416 break;
2417 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2418 break;
2419 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2420 break;
2421 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2422 break;
2423 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2424 break;
2425 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2426 break;
2427 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2428 break;
2429 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2430 break;
2431 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2432 break;
2433 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2434 break;
2435 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2436 break;
2437 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2438 break;
2439 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2440 break;
2441 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2442 break;
2443 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2444 break;
2445 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2446 break;
2447 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2448 break;
2449 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2450 break;
2451 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2452 break;
2453 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2454 break;
2455 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2456 break;
2457 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2458 break;
2459 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2460 break;
2461 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2462 break;
2463 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2464 break;
2465 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2466 break;
2467 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2468 break;
2469 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2470 break;
2471 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2472 break;
2473 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2474 break;
2475 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2476 break;
2477 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2478 break;
2479 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2480 break;
2481 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2482 break;
2483 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2484 break;
2485 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2486 break;
2487 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2488 break;
2489 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2490 break;
2491 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2492 break;
2493 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2494 break;
2495 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2496 break;
2497 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2498 break;
2499 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2500 break;
2501 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2502 break;
2503 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2504 break;
2505 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2506 break;
2507 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2508 break;
2509 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2510 break;
2511 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2512 break;
2513 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2514 break;
2515 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2516 break;
2517 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2518 break;
2519 }
2520
2521 return ppc64_elf_howto_table[r];
2522 };
2523
2524 static reloc_howto_type *
2525 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2526 const char *r_name)
2527 {
2528 unsigned int i;
2529
2530 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2531 if (ppc64_elf_howto_raw[i].name != NULL
2532 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2533 return &ppc64_elf_howto_raw[i];
2534
2535
2536 return NULL;
2537 }
2538
2539 /* Set the howto pointer for a PowerPC ELF reloc. */
2540
2541 static bfd_boolean
2542 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2543 Elf_Internal_Rela *dst)
2544 {
2545 unsigned int type;
2546
2547 /* Initialize howto table if needed. */
2548 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2549 ppc_howto_init ();
2550
2551 type = ELF64_R_TYPE (dst->r_info);
2552 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2553 {
2554 /* xgettext:c-format */
2555 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2556 abfd, type);
2557 bfd_set_error (bfd_error_bad_value);
2558 return FALSE;
2559 }
2560 cache_ptr->howto = ppc64_elf_howto_table[type];
2561 if (cache_ptr->howto == NULL || cache_ptr->howto->name == NULL)
2562 {
2563 /* xgettext:c-format */
2564 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2565 abfd, type);
2566 bfd_set_error (bfd_error_bad_value);
2567 return FALSE;
2568 }
2569
2570 return TRUE;
2571 }
2572
2573 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2574
2575 static bfd_reloc_status_type
2576 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2577 void *data, asection *input_section,
2578 bfd *output_bfd, char **error_message)
2579 {
2580 enum elf_ppc64_reloc_type r_type;
2581 long insn;
2582 bfd_size_type octets;
2583 bfd_vma value;
2584
2585 /* If this is a relocatable link (output_bfd test tells us), just
2586 call the generic function. Any adjustment will be done at final
2587 link time. */
2588 if (output_bfd != NULL)
2589 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2590 input_section, output_bfd, error_message);
2591
2592 /* Adjust the addend for sign extension of the low 16 bits.
2593 We won't actually be using the low 16 bits, so trashing them
2594 doesn't matter. */
2595 reloc_entry->addend += 0x8000;
2596 r_type = reloc_entry->howto->type;
2597 if (r_type != R_PPC64_REL16DX_HA)
2598 return bfd_reloc_continue;
2599
2600 value = 0;
2601 if (!bfd_is_com_section (symbol->section))
2602 value = symbol->value;
2603 value += (reloc_entry->addend
2604 + symbol->section->output_offset
2605 + symbol->section->output_section->vma);
2606 value -= (reloc_entry->address
2607 + input_section->output_offset
2608 + input_section->output_section->vma);
2609 value = (bfd_signed_vma) value >> 16;
2610
2611 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2612 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2613 insn &= ~0x1fffc1;
2614 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2615 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2616 if (value + 0x8000 > 0xffff)
2617 return bfd_reloc_overflow;
2618 return bfd_reloc_ok;
2619 }
2620
2621 static bfd_reloc_status_type
2622 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2623 void *data, asection *input_section,
2624 bfd *output_bfd, char **error_message)
2625 {
2626 if (output_bfd != NULL)
2627 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2628 input_section, output_bfd, error_message);
2629
2630 if (strcmp (symbol->section->name, ".opd") == 0
2631 && (symbol->section->owner->flags & DYNAMIC) == 0)
2632 {
2633 bfd_vma dest = opd_entry_value (symbol->section,
2634 symbol->value + reloc_entry->addend,
2635 NULL, NULL, FALSE);
2636 if (dest != (bfd_vma) -1)
2637 reloc_entry->addend = dest - (symbol->value
2638 + symbol->section->output_section->vma
2639 + symbol->section->output_offset);
2640 }
2641 else
2642 {
2643 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2644
2645 if (symbol->section->owner != abfd
2646 && symbol->section->owner != NULL
2647 && abiversion (symbol->section->owner) >= 2)
2648 {
2649 unsigned int i;
2650
2651 for (i = 0; i < symbol->section->owner->symcount; ++i)
2652 {
2653 asymbol *symdef = symbol->section->owner->outsymbols[i];
2654
2655 if (strcmp (symdef->name, symbol->name) == 0)
2656 {
2657 elfsym = (elf_symbol_type *) symdef;
2658 break;
2659 }
2660 }
2661 }
2662 reloc_entry->addend
2663 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2664 }
2665 return bfd_reloc_continue;
2666 }
2667
2668 static bfd_reloc_status_type
2669 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2670 void *data, asection *input_section,
2671 bfd *output_bfd, char **error_message)
2672 {
2673 long insn;
2674 enum elf_ppc64_reloc_type r_type;
2675 bfd_size_type octets;
2676 /* Assume 'at' branch hints. */
2677 bfd_boolean is_isa_v2 = TRUE;
2678
2679 /* If this is a relocatable link (output_bfd test tells us), just
2680 call the generic function. Any adjustment will be done at final
2681 link time. */
2682 if (output_bfd != NULL)
2683 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2684 input_section, output_bfd, error_message);
2685
2686 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2687 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2688 insn &= ~(0x01 << 21);
2689 r_type = reloc_entry->howto->type;
2690 if (r_type == R_PPC64_ADDR14_BRTAKEN
2691 || r_type == R_PPC64_REL14_BRTAKEN)
2692 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2693
2694 if (is_isa_v2)
2695 {
2696 /* Set 'a' bit. This is 0b00010 in BO field for branch
2697 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2698 for branch on CTR insns (BO == 1a00t or 1a01t). */
2699 if ((insn & (0x14 << 21)) == (0x04 << 21))
2700 insn |= 0x02 << 21;
2701 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2702 insn |= 0x08 << 21;
2703 else
2704 goto out;
2705 }
2706 else
2707 {
2708 bfd_vma target = 0;
2709 bfd_vma from;
2710
2711 if (!bfd_is_com_section (symbol->section))
2712 target = symbol->value;
2713 target += symbol->section->output_section->vma;
2714 target += symbol->section->output_offset;
2715 target += reloc_entry->addend;
2716
2717 from = (reloc_entry->address
2718 + input_section->output_offset
2719 + input_section->output_section->vma);
2720
2721 /* Invert 'y' bit if not the default. */
2722 if ((bfd_signed_vma) (target - from) < 0)
2723 insn ^= 0x01 << 21;
2724 }
2725 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2726 out:
2727 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2728 input_section, output_bfd, error_message);
2729 }
2730
2731 static bfd_reloc_status_type
2732 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2733 void *data, asection *input_section,
2734 bfd *output_bfd, char **error_message)
2735 {
2736 /* If this is a relocatable link (output_bfd test tells us), just
2737 call the generic function. Any adjustment will be done at final
2738 link time. */
2739 if (output_bfd != NULL)
2740 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2741 input_section, output_bfd, error_message);
2742
2743 /* Subtract the symbol section base address. */
2744 reloc_entry->addend -= symbol->section->output_section->vma;
2745 return bfd_reloc_continue;
2746 }
2747
2748 static bfd_reloc_status_type
2749 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2750 void *data, asection *input_section,
2751 bfd *output_bfd, char **error_message)
2752 {
2753 /* If this is a relocatable link (output_bfd test tells us), just
2754 call the generic function. Any adjustment will be done at final
2755 link time. */
2756 if (output_bfd != NULL)
2757 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2758 input_section, output_bfd, error_message);
2759
2760 /* Subtract the symbol section base address. */
2761 reloc_entry->addend -= symbol->section->output_section->vma;
2762
2763 /* Adjust the addend for sign extension of the low 16 bits. */
2764 reloc_entry->addend += 0x8000;
2765 return bfd_reloc_continue;
2766 }
2767
2768 static bfd_reloc_status_type
2769 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2770 void *data, asection *input_section,
2771 bfd *output_bfd, char **error_message)
2772 {
2773 bfd_vma TOCstart;
2774
2775 /* If this is a relocatable link (output_bfd test tells us), just
2776 call the generic function. Any adjustment will be done at final
2777 link time. */
2778 if (output_bfd != NULL)
2779 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2780 input_section, output_bfd, error_message);
2781
2782 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2783 if (TOCstart == 0)
2784 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2785
2786 /* Subtract the TOC base address. */
2787 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2788 return bfd_reloc_continue;
2789 }
2790
2791 static bfd_reloc_status_type
2792 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2793 void *data, asection *input_section,
2794 bfd *output_bfd, char **error_message)
2795 {
2796 bfd_vma TOCstart;
2797
2798 /* If this is a relocatable link (output_bfd test tells us), just
2799 call the generic function. Any adjustment will be done at final
2800 link time. */
2801 if (output_bfd != NULL)
2802 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2803 input_section, output_bfd, error_message);
2804
2805 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2806 if (TOCstart == 0)
2807 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2808
2809 /* Subtract the TOC base address. */
2810 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2811
2812 /* Adjust the addend for sign extension of the low 16 bits. */
2813 reloc_entry->addend += 0x8000;
2814 return bfd_reloc_continue;
2815 }
2816
2817 static bfd_reloc_status_type
2818 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2819 void *data, asection *input_section,
2820 bfd *output_bfd, char **error_message)
2821 {
2822 bfd_vma TOCstart;
2823 bfd_size_type octets;
2824
2825 /* If this is a relocatable link (output_bfd test tells us), just
2826 call the generic function. Any adjustment will be done at final
2827 link time. */
2828 if (output_bfd != NULL)
2829 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2830 input_section, output_bfd, error_message);
2831
2832 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2833 if (TOCstart == 0)
2834 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2835
2836 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2837 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2838 return bfd_reloc_ok;
2839 }
2840
2841 static bfd_reloc_status_type
2842 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2843 void *data, asection *input_section,
2844 bfd *output_bfd, char **error_message)
2845 {
2846 /* If this is a relocatable link (output_bfd test tells us), just
2847 call the generic function. Any adjustment will be done at final
2848 link time. */
2849 if (output_bfd != NULL)
2850 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2851 input_section, output_bfd, error_message);
2852
2853 if (error_message != NULL)
2854 {
2855 static char buf[60];
2856 sprintf (buf, "generic linker can't handle %s",
2857 reloc_entry->howto->name);
2858 *error_message = buf;
2859 }
2860 return bfd_reloc_dangerous;
2861 }
2862
2863 /* Track GOT entries needed for a given symbol. We might need more
2864 than one got entry per symbol. */
2865 struct got_entry
2866 {
2867 struct got_entry *next;
2868
2869 /* The symbol addend that we'll be placing in the GOT. */
2870 bfd_vma addend;
2871
2872 /* Unlike other ELF targets, we use separate GOT entries for the same
2873 symbol referenced from different input files. This is to support
2874 automatic multiple TOC/GOT sections, where the TOC base can vary
2875 from one input file to another. After partitioning into TOC groups
2876 we merge entries within the group.
2877
2878 Point to the BFD owning this GOT entry. */
2879 bfd *owner;
2880
2881 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2882 TLS_TPREL or TLS_DTPREL for tls entries. */
2883 unsigned char tls_type;
2884
2885 /* Non-zero if got.ent points to real entry. */
2886 unsigned char is_indirect;
2887
2888 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2889 union
2890 {
2891 bfd_signed_vma refcount;
2892 bfd_vma offset;
2893 struct got_entry *ent;
2894 } got;
2895 };
2896
2897 /* The same for PLT. */
2898 struct plt_entry
2899 {
2900 struct plt_entry *next;
2901
2902 bfd_vma addend;
2903
2904 union
2905 {
2906 bfd_signed_vma refcount;
2907 bfd_vma offset;
2908 } plt;
2909 };
2910
2911 struct ppc64_elf_obj_tdata
2912 {
2913 struct elf_obj_tdata elf;
2914
2915 /* Shortcuts to dynamic linker sections. */
2916 asection *got;
2917 asection *relgot;
2918
2919 /* Used during garbage collection. We attach global symbols defined
2920 on removed .opd entries to this section so that the sym is removed. */
2921 asection *deleted_section;
2922
2923 /* TLS local dynamic got entry handling. Support for multiple GOT
2924 sections means we potentially need one of these for each input bfd. */
2925 struct got_entry tlsld_got;
2926
2927 union {
2928 /* A copy of relocs before they are modified for --emit-relocs. */
2929 Elf_Internal_Rela *relocs;
2930
2931 /* Section contents. */
2932 bfd_byte *contents;
2933 } opd;
2934
2935 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2936 the reloc to be in the range -32768 to 32767. */
2937 unsigned int has_small_toc_reloc : 1;
2938
2939 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2940 instruction not one we handle. */
2941 unsigned int unexpected_toc_insn : 1;
2942 };
2943
2944 #define ppc64_elf_tdata(bfd) \
2945 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2946
2947 #define ppc64_tlsld_got(bfd) \
2948 (&ppc64_elf_tdata (bfd)->tlsld_got)
2949
2950 #define is_ppc64_elf(bfd) \
2951 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2952 && elf_object_id (bfd) == PPC64_ELF_DATA)
2953
2954 /* Override the generic function because we store some extras. */
2955
2956 static bfd_boolean
2957 ppc64_elf_mkobject (bfd *abfd)
2958 {
2959 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2960 PPC64_ELF_DATA);
2961 }
2962
2963 /* Fix bad default arch selected for a 64 bit input bfd when the
2964 default is 32 bit. Also select arch based on apuinfo. */
2965
2966 static bfd_boolean
2967 ppc64_elf_object_p (bfd *abfd)
2968 {
2969 if (!abfd->arch_info->the_default)
2970 return TRUE;
2971
2972 if (abfd->arch_info->bits_per_word == 32)
2973 {
2974 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2975
2976 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2977 {
2978 /* Relies on arch after 32 bit default being 64 bit default. */
2979 abfd->arch_info = abfd->arch_info->next;
2980 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2981 }
2982 }
2983 return _bfd_elf_ppc_set_arch (abfd);
2984 }
2985
2986 /* Support for core dump NOTE sections. */
2987
2988 static bfd_boolean
2989 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2990 {
2991 size_t offset, size;
2992
2993 if (note->descsz != 504)
2994 return FALSE;
2995
2996 /* pr_cursig */
2997 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2998
2999 /* pr_pid */
3000 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3001
3002 /* pr_reg */
3003 offset = 112;
3004 size = 384;
3005
3006 /* Make a ".reg/999" section. */
3007 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3008 size, note->descpos + offset);
3009 }
3010
3011 static bfd_boolean
3012 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3013 {
3014 if (note->descsz != 136)
3015 return FALSE;
3016
3017 elf_tdata (abfd)->core->pid
3018 = bfd_get_32 (abfd, note->descdata + 24);
3019 elf_tdata (abfd)->core->program
3020 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3021 elf_tdata (abfd)->core->command
3022 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3023
3024 return TRUE;
3025 }
3026
3027 static char *
3028 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
3029 ...)
3030 {
3031 switch (note_type)
3032 {
3033 default:
3034 return NULL;
3035
3036 case NT_PRPSINFO:
3037 {
3038 char data[136] ATTRIBUTE_NONSTRING;
3039 va_list ap;
3040
3041 va_start (ap, note_type);
3042 memset (data, 0, sizeof (data));
3043 strncpy (data + 40, va_arg (ap, const char *), 16);
3044 DIAGNOSTIC_PUSH;
3045 /* GCC 8.1 warns about 80 equals destination size with
3046 -Wstringop-truncation:
3047 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3048 */
3049 #if GCC_VERSION == 8001
3050 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3051 #endif
3052 strncpy (data + 56, va_arg (ap, const char *), 80);
3053 DIAGNOSTIC_POP;
3054 va_end (ap);
3055 return elfcore_write_note (abfd, buf, bufsiz,
3056 "CORE", note_type, data, sizeof (data));
3057 }
3058
3059 case NT_PRSTATUS:
3060 {
3061 char data[504];
3062 va_list ap;
3063 long pid;
3064 int cursig;
3065 const void *greg;
3066
3067 va_start (ap, note_type);
3068 memset (data, 0, 112);
3069 pid = va_arg (ap, long);
3070 bfd_put_32 (abfd, pid, data + 32);
3071 cursig = va_arg (ap, int);
3072 bfd_put_16 (abfd, cursig, data + 12);
3073 greg = va_arg (ap, const void *);
3074 memcpy (data + 112, greg, 384);
3075 memset (data + 496, 0, 8);
3076 va_end (ap);
3077 return elfcore_write_note (abfd, buf, bufsiz,
3078 "CORE", note_type, data, sizeof (data));
3079 }
3080 }
3081 }
3082
3083 /* Add extra PPC sections. */
3084
3085 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3086 {
3087 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3088 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3089 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3090 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3091 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3092 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3093 { NULL, 0, 0, 0, 0 }
3094 };
3095
3096 enum _ppc64_sec_type {
3097 sec_normal = 0,
3098 sec_opd = 1,
3099 sec_toc = 2
3100 };
3101
3102 struct _ppc64_elf_section_data
3103 {
3104 struct bfd_elf_section_data elf;
3105
3106 union
3107 {
3108 /* An array with one entry for each opd function descriptor,
3109 and some spares since opd entries may be either 16 or 24 bytes. */
3110 #define OPD_NDX(OFF) ((OFF) >> 4)
3111 struct _opd_sec_data
3112 {
3113 /* Points to the function code section for local opd entries. */
3114 asection **func_sec;
3115
3116 /* After editing .opd, adjust references to opd local syms. */
3117 long *adjust;
3118 } opd;
3119
3120 /* An array for toc sections, indexed by offset/8. */
3121 struct _toc_sec_data
3122 {
3123 /* Specifies the relocation symbol index used at a given toc offset. */
3124 unsigned *symndx;
3125
3126 /* And the relocation addend. */
3127 bfd_vma *add;
3128 } toc;
3129 } u;
3130
3131 enum _ppc64_sec_type sec_type:2;
3132
3133 /* Flag set when small branches are detected. Used to
3134 select suitable defaults for the stub group size. */
3135 unsigned int has_14bit_branch:1;
3136
3137 /* Flag set when PLTCALL relocs are detected. */
3138 unsigned int has_pltcall:1;
3139 };
3140
3141 #define ppc64_elf_section_data(sec) \
3142 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3143
3144 static bfd_boolean
3145 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3146 {
3147 if (!sec->used_by_bfd)
3148 {
3149 struct _ppc64_elf_section_data *sdata;
3150 bfd_size_type amt = sizeof (*sdata);
3151
3152 sdata = bfd_zalloc (abfd, amt);
3153 if (sdata == NULL)
3154 return FALSE;
3155 sec->used_by_bfd = sdata;
3156 }
3157
3158 return _bfd_elf_new_section_hook (abfd, sec);
3159 }
3160
3161 static struct _opd_sec_data *
3162 get_opd_info (asection * sec)
3163 {
3164 if (sec != NULL
3165 && ppc64_elf_section_data (sec) != NULL
3166 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3167 return &ppc64_elf_section_data (sec)->u.opd;
3168 return NULL;
3169 }
3170 \f
3171 /* Parameters for the qsort hook. */
3172 static bfd_boolean synthetic_relocatable;
3173 static asection *synthetic_opd;
3174
3175 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3176
3177 static int
3178 compare_symbols (const void *ap, const void *bp)
3179 {
3180 const asymbol *a = * (const asymbol **) ap;
3181 const asymbol *b = * (const asymbol **) bp;
3182
3183 /* Section symbols first. */
3184 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3185 return -1;
3186 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3187 return 1;
3188
3189 /* then .opd symbols. */
3190 if (synthetic_opd != NULL)
3191 {
3192 if (strcmp (a->section->name, ".opd") == 0
3193 && strcmp (b->section->name, ".opd") != 0)
3194 return -1;
3195 if (strcmp (a->section->name, ".opd") != 0
3196 && strcmp (b->section->name, ".opd") == 0)
3197 return 1;
3198 }
3199
3200 /* then other code symbols. */
3201 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3202 == (SEC_CODE | SEC_ALLOC)
3203 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3204 != (SEC_CODE | SEC_ALLOC))
3205 return -1;
3206
3207 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3208 != (SEC_CODE | SEC_ALLOC)
3209 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3210 == (SEC_CODE | SEC_ALLOC))
3211 return 1;
3212
3213 if (synthetic_relocatable)
3214 {
3215 if (a->section->id < b->section->id)
3216 return -1;
3217
3218 if (a->section->id > b->section->id)
3219 return 1;
3220 }
3221
3222 if (a->value + a->section->vma < b->value + b->section->vma)
3223 return -1;
3224
3225 if (a->value + a->section->vma > b->value + b->section->vma)
3226 return 1;
3227
3228 /* For syms with the same value, prefer strong dynamic global function
3229 syms over other syms. */
3230 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3231 return -1;
3232
3233 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3234 return 1;
3235
3236 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3237 return -1;
3238
3239 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3240 return 1;
3241
3242 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3243 return -1;
3244
3245 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3246 return 1;
3247
3248 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3249 return -1;
3250
3251 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3252 return 1;
3253
3254 return a > b;
3255 }
3256
3257 /* Search SYMS for a symbol of the given VALUE. */
3258
3259 static asymbol *
3260 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3261 {
3262 long mid;
3263
3264 if (id == (unsigned) -1)
3265 {
3266 while (lo < hi)
3267 {
3268 mid = (lo + hi) >> 1;
3269 if (syms[mid]->value + syms[mid]->section->vma < value)
3270 lo = mid + 1;
3271 else if (syms[mid]->value + syms[mid]->section->vma > value)
3272 hi = mid;
3273 else
3274 return syms[mid];
3275 }
3276 }
3277 else
3278 {
3279 while (lo < hi)
3280 {
3281 mid = (lo + hi) >> 1;
3282 if (syms[mid]->section->id < id)
3283 lo = mid + 1;
3284 else if (syms[mid]->section->id > id)
3285 hi = mid;
3286 else if (syms[mid]->value < value)
3287 lo = mid + 1;
3288 else if (syms[mid]->value > value)
3289 hi = mid;
3290 else
3291 return syms[mid];
3292 }
3293 }
3294 return NULL;
3295 }
3296
3297 static bfd_boolean
3298 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3299 {
3300 bfd_vma vma = *(bfd_vma *) ptr;
3301 return ((section->flags & SEC_ALLOC) != 0
3302 && section->vma <= vma
3303 && vma < section->vma + section->size);
3304 }
3305
3306 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3307 entry syms. Also generate @plt symbols for the glink branch table.
3308 Returns count of synthetic symbols in RET or -1 on error. */
3309
3310 static long
3311 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3312 long static_count, asymbol **static_syms,
3313 long dyn_count, asymbol **dyn_syms,
3314 asymbol **ret)
3315 {
3316 asymbol *s;
3317 size_t i, j, count;
3318 char *names;
3319 size_t symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3320 asection *opd = NULL;
3321 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3322 asymbol **syms;
3323 int abi = abiversion (abfd);
3324
3325 *ret = NULL;
3326
3327 if (abi < 2)
3328 {
3329 opd = bfd_get_section_by_name (abfd, ".opd");
3330 if (opd == NULL && abi == 1)
3331 return 0;
3332 }
3333
3334 syms = NULL;
3335 codesecsym = 0;
3336 codesecsymend = 0;
3337 secsymend = 0;
3338 opdsymend = 0;
3339 symcount = 0;
3340 if (opd != NULL)
3341 {
3342 symcount = static_count;
3343 if (!relocatable)
3344 symcount += dyn_count;
3345 if (symcount == 0)
3346 return 0;
3347
3348 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3349 if (syms == NULL)
3350 return -1;
3351
3352 if (!relocatable && static_count != 0 && dyn_count != 0)
3353 {
3354 /* Use both symbol tables. */
3355 memcpy (syms, static_syms, static_count * sizeof (*syms));
3356 memcpy (syms + static_count, dyn_syms,
3357 (dyn_count + 1) * sizeof (*syms));
3358 }
3359 else if (!relocatable && static_count == 0)
3360 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3361 else
3362 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3363
3364 /* Trim uninteresting symbols. Interesting symbols are section,
3365 function, and notype symbols. */
3366 for (i = 0, j = 0; i < symcount; ++i)
3367 if ((syms[i]->flags & (BSF_FILE | BSF_OBJECT | BSF_THREAD_LOCAL
3368 | BSF_RELC | BSF_SRELC)) == 0)
3369 syms[j++] = syms[i];
3370 symcount = j;
3371
3372 synthetic_relocatable = relocatable;
3373 synthetic_opd = opd;
3374 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3375
3376 if (!relocatable && symcount > 1)
3377 {
3378 /* Trim duplicate syms, since we may have merged the normal
3379 and dynamic symbols. Actually, we only care about syms
3380 that have different values, so trim any with the same
3381 value. Don't consider ifunc and ifunc resolver symbols
3382 duplicates however, because GDB wants to know whether a
3383 text symbol is an ifunc resolver. */
3384 for (i = 1, j = 1; i < symcount; ++i)
3385 {
3386 const asymbol *s0 = syms[i - 1];
3387 const asymbol *s1 = syms[i];
3388
3389 if ((s0->value + s0->section->vma
3390 != s1->value + s1->section->vma)
3391 || ((s0->flags & BSF_GNU_INDIRECT_FUNCTION)
3392 != (s1->flags & BSF_GNU_INDIRECT_FUNCTION)))
3393 syms[j++] = syms[i];
3394 }
3395 symcount = j;
3396 }
3397
3398 i = 0;
3399 /* Note that here and in compare_symbols we can't compare opd and
3400 sym->section directly. With separate debug info files, the
3401 symbols will be extracted from the debug file while abfd passed
3402 to this function is the real binary. */
3403 if (strcmp (syms[i]->section->name, ".opd") == 0)
3404 ++i;
3405 codesecsym = i;
3406
3407 for (; i < symcount; ++i)
3408 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC
3409 | SEC_THREAD_LOCAL))
3410 != (SEC_CODE | SEC_ALLOC))
3411 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3412 break;
3413 codesecsymend = i;
3414
3415 for (; i < symcount; ++i)
3416 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3417 break;
3418 secsymend = i;
3419
3420 for (; i < symcount; ++i)
3421 if (strcmp (syms[i]->section->name, ".opd") != 0)
3422 break;
3423 opdsymend = i;
3424
3425 for (; i < symcount; ++i)
3426 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3427 != (SEC_CODE | SEC_ALLOC))
3428 break;
3429 symcount = i;
3430 }
3431 count = 0;
3432
3433 if (relocatable)
3434 {
3435 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3436 arelent *r;
3437 size_t size;
3438 size_t relcount;
3439
3440 if (opdsymend == secsymend)
3441 goto done;
3442
3443 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3444 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3445 if (relcount == 0)
3446 goto done;
3447
3448 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3449 {
3450 count = -1;
3451 goto done;
3452 }
3453
3454 size = 0;
3455 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3456 {
3457 asymbol *sym;
3458
3459 while (r < opd->relocation + relcount
3460 && r->address < syms[i]->value + opd->vma)
3461 ++r;
3462
3463 if (r == opd->relocation + relcount)
3464 break;
3465
3466 if (r->address != syms[i]->value + opd->vma)
3467 continue;
3468
3469 if (r->howto->type != R_PPC64_ADDR64)
3470 continue;
3471
3472 sym = *r->sym_ptr_ptr;
3473 if (!sym_exists_at (syms, opdsymend, symcount,
3474 sym->section->id, sym->value + r->addend))
3475 {
3476 ++count;
3477 size += sizeof (asymbol);
3478 size += strlen (syms[i]->name) + 2;
3479 }
3480 }
3481
3482 if (size == 0)
3483 goto done;
3484 s = *ret = bfd_malloc (size);
3485 if (s == NULL)
3486 {
3487 count = -1;
3488 goto done;
3489 }
3490
3491 names = (char *) (s + count);
3492
3493 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3494 {
3495 asymbol *sym;
3496
3497 while (r < opd->relocation + relcount
3498 && r->address < syms[i]->value + opd->vma)
3499 ++r;
3500
3501 if (r == opd->relocation + relcount)
3502 break;
3503
3504 if (r->address != syms[i]->value + opd->vma)
3505 continue;
3506
3507 if (r->howto->type != R_PPC64_ADDR64)
3508 continue;
3509
3510 sym = *r->sym_ptr_ptr;
3511 if (!sym_exists_at (syms, opdsymend, symcount,
3512 sym->section->id, sym->value + r->addend))
3513 {
3514 size_t len;
3515
3516 *s = *syms[i];
3517 s->flags |= BSF_SYNTHETIC;
3518 s->section = sym->section;
3519 s->value = sym->value + r->addend;
3520 s->name = names;
3521 *names++ = '.';
3522 len = strlen (syms[i]->name);
3523 memcpy (names, syms[i]->name, len + 1);
3524 names += len + 1;
3525 /* Have udata.p point back to the original symbol this
3526 synthetic symbol was derived from. */
3527 s->udata.p = syms[i];
3528 s++;
3529 }
3530 }
3531 }
3532 else
3533 {
3534 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3535 bfd_byte *contents = NULL;
3536 size_t size;
3537 size_t plt_count = 0;
3538 bfd_vma glink_vma = 0, resolv_vma = 0;
3539 asection *dynamic, *glink = NULL, *relplt = NULL;
3540 arelent *p;
3541
3542 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3543 {
3544 free_contents_and_exit_err:
3545 count = -1;
3546 free_contents_and_exit:
3547 if (contents)
3548 free (contents);
3549 goto done;
3550 }
3551
3552 size = 0;
3553 for (i = secsymend; i < opdsymend; ++i)
3554 {
3555 bfd_vma ent;
3556
3557 /* Ignore bogus symbols. */
3558 if (syms[i]->value > opd->size - 8)
3559 continue;
3560
3561 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3562 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3563 {
3564 ++count;
3565 size += sizeof (asymbol);
3566 size += strlen (syms[i]->name) + 2;
3567 }
3568 }
3569
3570 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3571 if (dyn_count != 0
3572 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3573 {
3574 bfd_byte *dynbuf, *extdyn, *extdynend;
3575 size_t extdynsize;
3576 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3577
3578 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3579 goto free_contents_and_exit_err;
3580
3581 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3582 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3583
3584 extdyn = dynbuf;
3585 extdynend = extdyn + dynamic->size;
3586 for (; extdyn < extdynend; extdyn += extdynsize)
3587 {
3588 Elf_Internal_Dyn dyn;
3589 (*swap_dyn_in) (abfd, extdyn, &dyn);
3590
3591 if (dyn.d_tag == DT_NULL)
3592 break;
3593
3594 if (dyn.d_tag == DT_PPC64_GLINK)
3595 {
3596 /* The first glink stub starts at DT_PPC64_GLINK plus 32.
3597 See comment in ppc64_elf_finish_dynamic_sections. */
3598 glink_vma = dyn.d_un.d_val + 8 * 4;
3599 /* The .glink section usually does not survive the final
3600 link; search for the section (usually .text) where the
3601 glink stubs now reside. */
3602 glink = bfd_sections_find_if (abfd, section_covers_vma,
3603 &glink_vma);
3604 break;
3605 }
3606 }
3607
3608 free (dynbuf);
3609 }
3610
3611 if (glink != NULL)
3612 {
3613 /* Determine __glink trampoline by reading the relative branch
3614 from the first glink stub. */
3615 bfd_byte buf[4];
3616 unsigned int off = 0;
3617
3618 while (bfd_get_section_contents (abfd, glink, buf,
3619 glink_vma + off - glink->vma, 4))
3620 {
3621 unsigned int insn = bfd_get_32 (abfd, buf);
3622 insn ^= B_DOT;
3623 if ((insn & ~0x3fffffc) == 0)
3624 {
3625 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3626 break;
3627 }
3628 off += 4;
3629 if (off > 4)
3630 break;
3631 }
3632
3633 if (resolv_vma)
3634 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3635
3636 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3637 if (relplt != NULL)
3638 {
3639 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3640 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3641 goto free_contents_and_exit_err;
3642
3643 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3644 size += plt_count * sizeof (asymbol);
3645
3646 p = relplt->relocation;
3647 for (i = 0; i < plt_count; i++, p++)
3648 {
3649 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3650 if (p->addend != 0)
3651 size += sizeof ("+0x") - 1 + 16;
3652 }
3653 }
3654 }
3655
3656 if (size == 0)
3657 goto free_contents_and_exit;
3658 s = *ret = bfd_malloc (size);
3659 if (s == NULL)
3660 goto free_contents_and_exit_err;
3661
3662 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3663
3664 for (i = secsymend; i < opdsymend; ++i)
3665 {
3666 bfd_vma ent;
3667
3668 if (syms[i]->value > opd->size - 8)
3669 continue;
3670
3671 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3672 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3673 {
3674 size_t lo, hi;
3675 size_t len;
3676 asection *sec = abfd->sections;
3677
3678 *s = *syms[i];
3679 lo = codesecsym;
3680 hi = codesecsymend;
3681 while (lo < hi)
3682 {
3683 size_t mid = (lo + hi) >> 1;
3684 if (syms[mid]->section->vma < ent)
3685 lo = mid + 1;
3686 else if (syms[mid]->section->vma > ent)
3687 hi = mid;
3688 else
3689 {
3690 sec = syms[mid]->section;
3691 break;
3692 }
3693 }
3694
3695 if (lo >= hi && lo > codesecsym)
3696 sec = syms[lo - 1]->section;
3697
3698 for (; sec != NULL; sec = sec->next)
3699 {
3700 if (sec->vma > ent)
3701 break;
3702 /* SEC_LOAD may not be set if SEC is from a separate debug
3703 info file. */
3704 if ((sec->flags & SEC_ALLOC) == 0)
3705 break;
3706 if ((sec->flags & SEC_CODE) != 0)
3707 s->section = sec;
3708 }
3709 s->flags |= BSF_SYNTHETIC;
3710 s->value = ent - s->section->vma;
3711 s->name = names;
3712 *names++ = '.';
3713 len = strlen (syms[i]->name);
3714 memcpy (names, syms[i]->name, len + 1);
3715 names += len + 1;
3716 /* Have udata.p point back to the original symbol this
3717 synthetic symbol was derived from. */
3718 s->udata.p = syms[i];
3719 s++;
3720 }
3721 }
3722 free (contents);
3723
3724 if (glink != NULL && relplt != NULL)
3725 {
3726 if (resolv_vma)
3727 {
3728 /* Add a symbol for the main glink trampoline. */
3729 memset (s, 0, sizeof *s);
3730 s->the_bfd = abfd;
3731 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3732 s->section = glink;
3733 s->value = resolv_vma - glink->vma;
3734 s->name = names;
3735 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3736 names += sizeof ("__glink_PLTresolve");
3737 s++;
3738 count++;
3739 }
3740
3741 /* FIXME: It would be very much nicer to put sym@plt on the
3742 stub rather than on the glink branch table entry. The
3743 objdump disassembler would then use a sensible symbol
3744 name on plt calls. The difficulty in doing so is
3745 a) finding the stubs, and,
3746 b) matching stubs against plt entries, and,
3747 c) there can be multiple stubs for a given plt entry.
3748
3749 Solving (a) could be done by code scanning, but older
3750 ppc64 binaries used different stubs to current code.
3751 (b) is the tricky one since you need to known the toc
3752 pointer for at least one function that uses a pic stub to
3753 be able to calculate the plt address referenced.
3754 (c) means gdb would need to set multiple breakpoints (or
3755 find the glink branch itself) when setting breakpoints
3756 for pending shared library loads. */
3757 p = relplt->relocation;
3758 for (i = 0; i < plt_count; i++, p++)
3759 {
3760 size_t len;
3761
3762 *s = **p->sym_ptr_ptr;
3763 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3764 we are defining a symbol, ensure one of them is set. */
3765 if ((s->flags & BSF_LOCAL) == 0)
3766 s->flags |= BSF_GLOBAL;
3767 s->flags |= BSF_SYNTHETIC;
3768 s->section = glink;
3769 s->value = glink_vma - glink->vma;
3770 s->name = names;
3771 s->udata.p = NULL;
3772 len = strlen ((*p->sym_ptr_ptr)->name);
3773 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3774 names += len;
3775 if (p->addend != 0)
3776 {
3777 memcpy (names, "+0x", sizeof ("+0x") - 1);
3778 names += sizeof ("+0x") - 1;
3779 bfd_sprintf_vma (abfd, names, p->addend);
3780 names += strlen (names);
3781 }
3782 memcpy (names, "@plt", sizeof ("@plt"));
3783 names += sizeof ("@plt");
3784 s++;
3785 if (abi < 2)
3786 {
3787 glink_vma += 8;
3788 if (i >= 0x8000)
3789 glink_vma += 4;
3790 }
3791 else
3792 glink_vma += 4;
3793 }
3794 count += plt_count;
3795 }
3796 }
3797
3798 done:
3799 free (syms);
3800 return count;
3801 }
3802 \f
3803 /* The following functions are specific to the ELF linker, while
3804 functions above are used generally. Those named ppc64_elf_* are
3805 called by the main ELF linker code. They appear in this file more
3806 or less in the order in which they are called. eg.
3807 ppc64_elf_check_relocs is called early in the link process,
3808 ppc64_elf_finish_dynamic_sections is one of the last functions
3809 called.
3810
3811 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3812 functions have both a function code symbol and a function descriptor
3813 symbol. A call to foo in a relocatable object file looks like:
3814
3815 . .text
3816 . x:
3817 . bl .foo
3818 . nop
3819
3820 The function definition in another object file might be:
3821
3822 . .section .opd
3823 . foo: .quad .foo
3824 . .quad .TOC.@tocbase
3825 . .quad 0
3826 .
3827 . .text
3828 . .foo: blr
3829
3830 When the linker resolves the call during a static link, the branch
3831 unsurprisingly just goes to .foo and the .opd information is unused.
3832 If the function definition is in a shared library, things are a little
3833 different: The call goes via a plt call stub, the opd information gets
3834 copied to the plt, and the linker patches the nop.
3835
3836 . x:
3837 . bl .foo_stub
3838 . ld 2,40(1)
3839 .
3840 .
3841 . .foo_stub:
3842 . std 2,40(1) # in practice, the call stub
3843 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3844 . addi 11,11,Lfoo@toc@l # this is the general idea
3845 . ld 12,0(11)
3846 . ld 2,8(11)
3847 . mtctr 12
3848 . ld 11,16(11)
3849 . bctr
3850 .
3851 . .section .plt
3852 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3853
3854 The "reloc ()" notation is supposed to indicate that the linker emits
3855 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3856 copying.
3857
3858 What are the difficulties here? Well, firstly, the relocations
3859 examined by the linker in check_relocs are against the function code
3860 sym .foo, while the dynamic relocation in the plt is emitted against
3861 the function descriptor symbol, foo. Somewhere along the line, we need
3862 to carefully copy dynamic link information from one symbol to the other.
3863 Secondly, the generic part of the elf linker will make .foo a dynamic
3864 symbol as is normal for most other backends. We need foo dynamic
3865 instead, at least for an application final link. However, when
3866 creating a shared library containing foo, we need to have both symbols
3867 dynamic so that references to .foo are satisfied during the early
3868 stages of linking. Otherwise the linker might decide to pull in a
3869 definition from some other object, eg. a static library.
3870
3871 Update: As of August 2004, we support a new convention. Function
3872 calls may use the function descriptor symbol, ie. "bl foo". This
3873 behaves exactly as "bl .foo". */
3874
3875 /* Of those relocs that might be copied as dynamic relocs, this
3876 function selects those that must be copied when linking a shared
3877 library or PIE, even when the symbol is local. */
3878
3879 static int
3880 must_be_dyn_reloc (struct bfd_link_info *info,
3881 enum elf_ppc64_reloc_type r_type)
3882 {
3883 switch (r_type)
3884 {
3885 default:
3886 /* Only relative relocs can be resolved when the object load
3887 address isn't fixed. DTPREL64 is excluded because the
3888 dynamic linker needs to differentiate global dynamic from
3889 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3890 return 1;
3891
3892 case R_PPC64_REL32:
3893 case R_PPC64_REL64:
3894 case R_PPC64_REL30:
3895 return 0;
3896
3897 case R_PPC64_TPREL16:
3898 case R_PPC64_TPREL16_LO:
3899 case R_PPC64_TPREL16_HI:
3900 case R_PPC64_TPREL16_HA:
3901 case R_PPC64_TPREL16_DS:
3902 case R_PPC64_TPREL16_LO_DS:
3903 case R_PPC64_TPREL16_HIGH:
3904 case R_PPC64_TPREL16_HIGHA:
3905 case R_PPC64_TPREL16_HIGHER:
3906 case R_PPC64_TPREL16_HIGHERA:
3907 case R_PPC64_TPREL16_HIGHEST:
3908 case R_PPC64_TPREL16_HIGHESTA:
3909 case R_PPC64_TPREL64:
3910 /* These relocations are relative but in a shared library the
3911 linker doesn't know the thread pointer base. */
3912 return bfd_link_dll (info);
3913 }
3914 }
3915
3916 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3917 copying dynamic variables from a shared lib into an app's dynbss
3918 section, and instead use a dynamic relocation to point into the
3919 shared lib. With code that gcc generates, it's vital that this be
3920 enabled; In the PowerPC64 ABI, the address of a function is actually
3921 the address of a function descriptor, which resides in the .opd
3922 section. gcc uses the descriptor directly rather than going via the
3923 GOT as some other ABI's do, which means that initialized function
3924 pointers must reference the descriptor. Thus, a function pointer
3925 initialized to the address of a function in a shared library will
3926 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3927 redefines the function descriptor symbol to point to the copy. This
3928 presents a problem as a plt entry for that function is also
3929 initialized from the function descriptor symbol and the copy reloc
3930 may not be initialized first. */
3931 #define ELIMINATE_COPY_RELOCS 1
3932
3933 /* Section name for stubs is the associated section name plus this
3934 string. */
3935 #define STUB_SUFFIX ".stub"
3936
3937 /* Linker stubs.
3938 ppc_stub_long_branch:
3939 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3940 destination, but a 24 bit branch in a stub section will reach.
3941 . b dest
3942
3943 ppc_stub_plt_branch:
3944 Similar to the above, but a 24 bit branch in the stub section won't
3945 reach its destination.
3946 . addis %r11,%r2,xxx@toc@ha
3947 . ld %r12,xxx@toc@l(%r11)
3948 . mtctr %r12
3949 . bctr
3950
3951 ppc_stub_plt_call:
3952 Used to call a function in a shared library. If it so happens that
3953 the plt entry referenced crosses a 64k boundary, then an extra
3954 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3955 . std %r2,40(%r1)
3956 . addis %r11,%r2,xxx@toc@ha
3957 . ld %r12,xxx+0@toc@l(%r11)
3958 . mtctr %r12
3959 . ld %r2,xxx+8@toc@l(%r11)
3960 . ld %r11,xxx+16@toc@l(%r11)
3961 . bctr
3962
3963 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3964 code to adjust the value and save r2 to support multiple toc sections.
3965 A ppc_stub_long_branch with an r2 offset looks like:
3966 . std %r2,40(%r1)
3967 . addis %r2,%r2,off@ha
3968 . addi %r2,%r2,off@l
3969 . b dest
3970
3971 A ppc_stub_plt_branch with an r2 offset looks like:
3972 . std %r2,40(%r1)
3973 . addis %r11,%r2,xxx@toc@ha
3974 . ld %r12,xxx@toc@l(%r11)
3975 . addis %r2,%r2,off@ha
3976 . addi %r2,%r2,off@l
3977 . mtctr %r12
3978 . bctr
3979
3980 In cases where the "addis" instruction would add zero, the "addis" is
3981 omitted and following instructions modified slightly in some cases.
3982 */
3983
3984 enum ppc_stub_type {
3985 ppc_stub_none,
3986 ppc_stub_long_branch,
3987 ppc_stub_long_branch_r2off,
3988 ppc_stub_plt_branch,
3989 ppc_stub_plt_branch_r2off,
3990 ppc_stub_plt_call,
3991 ppc_stub_plt_call_r2save,
3992 ppc_stub_global_entry,
3993 ppc_stub_save_res
3994 };
3995
3996 /* Information on stub grouping. */
3997 struct map_stub
3998 {
3999 /* The stub section. */
4000 asection *stub_sec;
4001 /* This is the section to which stubs in the group will be attached. */
4002 asection *link_sec;
4003 /* Next group. */
4004 struct map_stub *next;
4005 /* Whether to emit a copy of register save/restore functions in this
4006 group. */
4007 int needs_save_res;
4008 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
4009 or -1u if no such stub with bctrl exists. */
4010 unsigned int tls_get_addr_opt_bctrl;
4011 };
4012
4013 struct ppc_stub_hash_entry {
4014
4015 /* Base hash table entry structure. */
4016 struct bfd_hash_entry root;
4017
4018 enum ppc_stub_type stub_type;
4019
4020 /* Group information. */
4021 struct map_stub *group;
4022
4023 /* Offset within stub_sec of the beginning of this stub. */
4024 bfd_vma stub_offset;
4025
4026 /* Given the symbol's value and its section we can determine its final
4027 value when building the stubs (so the stub knows where to jump. */
4028 bfd_vma target_value;
4029 asection *target_section;
4030
4031 /* The symbol table entry, if any, that this was derived from. */
4032 struct ppc_link_hash_entry *h;
4033 struct plt_entry *plt_ent;
4034
4035 /* Symbol type. */
4036 unsigned char symtype;
4037
4038 /* Symbol st_other. */
4039 unsigned char other;
4040 };
4041
4042 struct ppc_branch_hash_entry {
4043
4044 /* Base hash table entry structure. */
4045 struct bfd_hash_entry root;
4046
4047 /* Offset within branch lookup table. */
4048 unsigned int offset;
4049
4050 /* Generation marker. */
4051 unsigned int iter;
4052 };
4053
4054 /* Used to track dynamic relocations for local symbols. */
4055 struct ppc_dyn_relocs
4056 {
4057 struct ppc_dyn_relocs *next;
4058
4059 /* The input section of the reloc. */
4060 asection *sec;
4061
4062 /* Total number of relocs copied for the input section. */
4063 unsigned int count : 31;
4064
4065 /* Whether this entry is for STT_GNU_IFUNC symbols. */
4066 unsigned int ifunc : 1;
4067 };
4068
4069 struct ppc_link_hash_entry
4070 {
4071 struct elf_link_hash_entry elf;
4072
4073 union {
4074 /* A pointer to the most recently used stub hash entry against this
4075 symbol. */
4076 struct ppc_stub_hash_entry *stub_cache;
4077
4078 /* A pointer to the next symbol starting with a '.' */
4079 struct ppc_link_hash_entry *next_dot_sym;
4080 } u;
4081
4082 /* Track dynamic relocs copied for this symbol. */
4083 struct elf_dyn_relocs *dyn_relocs;
4084
4085 /* Link between function code and descriptor symbols. */
4086 struct ppc_link_hash_entry *oh;
4087
4088 /* Flag function code and descriptor symbols. */
4089 unsigned int is_func:1;
4090 unsigned int is_func_descriptor:1;
4091 unsigned int fake:1;
4092
4093 /* Whether global opd/toc sym has been adjusted or not.
4094 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4095 should be set for all globals defined in any opd/toc section. */
4096 unsigned int adjust_done:1;
4097
4098 /* Set if this is an out-of-line register save/restore function,
4099 with non-standard calling convention. */
4100 unsigned int save_res:1;
4101
4102 /* Set if a duplicate symbol with non-zero localentry is detected,
4103 even when the duplicate symbol does not provide a definition. */
4104 unsigned int non_zero_localentry:1;
4105
4106 /* Contexts in which symbol is used in the GOT (or TOC).
4107 Bits are or'd into the mask as the corresponding relocs are
4108 encountered during check_relocs, with TLS_TLS being set when any
4109 of the other TLS bits are set. tls_optimize clears bits when
4110 optimizing to indicate the corresponding GOT entry type is not
4111 needed. If set, TLS_TLS is never cleared. tls_optimize may also
4112 set TLS_TPRELGD when a GD reloc turns into a TPREL one. We use a
4113 separate flag rather than setting TPREL just for convenience in
4114 distinguishing the two cases.
4115 These flags are also kept for local symbols. */
4116 #define TLS_TLS 1 /* Any TLS reloc. */
4117 #define TLS_GD 2 /* GD reloc. */
4118 #define TLS_LD 4 /* LD reloc. */
4119 #define TLS_TPREL 8 /* TPREL reloc, => IE. */
4120 #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */
4121 #define TLS_MARK 32 /* __tls_get_addr call marked. */
4122 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4123 #define TLS_EXPLICIT 128 /* Marks TOC section TLS relocs. */
4124 unsigned char tls_mask;
4125
4126 /* The above field is also used to mark function symbols. In which
4127 case TLS_TLS will be 0. */
4128 #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */
4129 #define PLT_KEEP 4 /* inline plt call requires plt entry. */
4130 #define NON_GOT 256 /* local symbol plt, not stored. */
4131 };
4132
4133 /* ppc64 ELF linker hash table. */
4134
4135 struct ppc_link_hash_table
4136 {
4137 struct elf_link_hash_table elf;
4138
4139 /* The stub hash table. */
4140 struct bfd_hash_table stub_hash_table;
4141
4142 /* Another hash table for plt_branch stubs. */
4143 struct bfd_hash_table branch_hash_table;
4144
4145 /* Hash table for function prologue tocsave. */
4146 htab_t tocsave_htab;
4147
4148 /* Various options and other info passed from the linker. */
4149 struct ppc64_elf_params *params;
4150
4151 /* The size of sec_info below. */
4152 unsigned int sec_info_arr_size;
4153
4154 /* Per-section array of extra section info. Done this way rather
4155 than as part of ppc64_elf_section_data so we have the info for
4156 non-ppc64 sections. */
4157 struct
4158 {
4159 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4160 bfd_vma toc_off;
4161
4162 union
4163 {
4164 /* The section group that this section belongs to. */
4165 struct map_stub *group;
4166 /* A temp section list pointer. */
4167 asection *list;
4168 } u;
4169 } *sec_info;
4170
4171 /* Linked list of groups. */
4172 struct map_stub *group;
4173
4174 /* Temp used when calculating TOC pointers. */
4175 bfd_vma toc_curr;
4176 bfd *toc_bfd;
4177 asection *toc_first_sec;
4178
4179 /* Used when adding symbols. */
4180 struct ppc_link_hash_entry *dot_syms;
4181
4182 /* Shortcuts to get to dynamic linker sections. */
4183 asection *glink;
4184 asection *global_entry;
4185 asection *sfpr;
4186 asection *pltlocal;
4187 asection *relpltlocal;
4188 asection *brlt;
4189 asection *relbrlt;
4190 asection *glink_eh_frame;
4191
4192 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4193 struct ppc_link_hash_entry *tls_get_addr;
4194 struct ppc_link_hash_entry *tls_get_addr_fd;
4195
4196 /* The size of reliplt used by got entry relocs. */
4197 bfd_size_type got_reli_size;
4198
4199 /* Statistics. */
4200 unsigned long stub_count[ppc_stub_global_entry];
4201
4202 /* Number of stubs against global syms. */
4203 unsigned long stub_globals;
4204
4205 /* Set if we're linking code with function descriptors. */
4206 unsigned int opd_abi:1;
4207
4208 /* Support for multiple toc sections. */
4209 unsigned int do_multi_toc:1;
4210 unsigned int multi_toc_needed:1;
4211 unsigned int second_toc_pass:1;
4212 unsigned int do_toc_opt:1;
4213
4214 /* Set if tls optimization is enabled. */
4215 unsigned int do_tls_opt:1;
4216
4217 /* Set if inline plt calls should be converted to direct calls. */
4218 unsigned int can_convert_all_inline_plt:1;
4219
4220 /* Set on error. */
4221 unsigned int stub_error:1;
4222
4223 /* Whether func_desc_adjust needs to be run over symbols. */
4224 unsigned int need_func_desc_adj:1;
4225
4226 /* Whether there exist local gnu indirect function resolvers,
4227 referenced by dynamic relocations. */
4228 unsigned int local_ifunc_resolver:1;
4229 unsigned int maybe_local_ifunc_resolver:1;
4230
4231 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4232 unsigned int has_plt_localentry0:1;
4233
4234 /* Incremented every time we size stubs. */
4235 unsigned int stub_iteration;
4236
4237 /* Small local sym cache. */
4238 struct sym_cache sym_cache;
4239 };
4240
4241 /* Rename some of the generic section flags to better document how they
4242 are used here. */
4243
4244 /* Nonzero if this section has TLS related relocations. */
4245 #define has_tls_reloc sec_flg0
4246
4247 /* Nonzero if this section has an old-style call to __tls_get_addr. */
4248 #define has_tls_get_addr_call sec_flg1
4249
4250 /* Nonzero if this section has any toc or got relocs. */
4251 #define has_toc_reloc sec_flg2
4252
4253 /* Nonzero if this section has a call to another section that uses
4254 the toc or got. */
4255 #define makes_toc_func_call sec_flg3
4256
4257 /* Recursion protection when determining above flag. */
4258 #define call_check_in_progress sec_flg4
4259 #define call_check_done sec_flg5
4260
4261 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4262
4263 #define ppc_hash_table(p) \
4264 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4265 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4266
4267 #define ppc_stub_hash_lookup(table, string, create, copy) \
4268 ((struct ppc_stub_hash_entry *) \
4269 bfd_hash_lookup ((table), (string), (create), (copy)))
4270
4271 #define ppc_branch_hash_lookup(table, string, create, copy) \
4272 ((struct ppc_branch_hash_entry *) \
4273 bfd_hash_lookup ((table), (string), (create), (copy)))
4274
4275 /* Create an entry in the stub hash table. */
4276
4277 static struct bfd_hash_entry *
4278 stub_hash_newfunc (struct bfd_hash_entry *entry,
4279 struct bfd_hash_table *table,
4280 const char *string)
4281 {
4282 /* Allocate the structure if it has not already been allocated by a
4283 subclass. */
4284 if (entry == NULL)
4285 {
4286 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4287 if (entry == NULL)
4288 return entry;
4289 }
4290
4291 /* Call the allocation method of the superclass. */
4292 entry = bfd_hash_newfunc (entry, table, string);
4293 if (entry != NULL)
4294 {
4295 struct ppc_stub_hash_entry *eh;
4296
4297 /* Initialize the local fields. */
4298 eh = (struct ppc_stub_hash_entry *) entry;
4299 eh->stub_type = ppc_stub_none;
4300 eh->group = NULL;
4301 eh->stub_offset = 0;
4302 eh->target_value = 0;
4303 eh->target_section = NULL;
4304 eh->h = NULL;
4305 eh->plt_ent = NULL;
4306 eh->other = 0;
4307 }
4308
4309 return entry;
4310 }
4311
4312 /* Create an entry in the branch hash table. */
4313
4314 static struct bfd_hash_entry *
4315 branch_hash_newfunc (struct bfd_hash_entry *entry,
4316 struct bfd_hash_table *table,
4317 const char *string)
4318 {
4319 /* Allocate the structure if it has not already been allocated by a
4320 subclass. */
4321 if (entry == NULL)
4322 {
4323 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4324 if (entry == NULL)
4325 return entry;
4326 }
4327
4328 /* Call the allocation method of the superclass. */
4329 entry = bfd_hash_newfunc (entry, table, string);
4330 if (entry != NULL)
4331 {
4332 struct ppc_branch_hash_entry *eh;
4333
4334 /* Initialize the local fields. */
4335 eh = (struct ppc_branch_hash_entry *) entry;
4336 eh->offset = 0;
4337 eh->iter = 0;
4338 }
4339
4340 return entry;
4341 }
4342
4343 /* Create an entry in a ppc64 ELF linker hash table. */
4344
4345 static struct bfd_hash_entry *
4346 link_hash_newfunc (struct bfd_hash_entry *entry,
4347 struct bfd_hash_table *table,
4348 const char *string)
4349 {
4350 /* Allocate the structure if it has not already been allocated by a
4351 subclass. */
4352 if (entry == NULL)
4353 {
4354 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4355 if (entry == NULL)
4356 return entry;
4357 }
4358
4359 /* Call the allocation method of the superclass. */
4360 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4361 if (entry != NULL)
4362 {
4363 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4364
4365 memset (&eh->u.stub_cache, 0,
4366 (sizeof (struct ppc_link_hash_entry)
4367 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4368
4369 /* When making function calls, old ABI code references function entry
4370 points (dot symbols), while new ABI code references the function
4371 descriptor symbol. We need to make any combination of reference and
4372 definition work together, without breaking archive linking.
4373
4374 For a defined function "foo" and an undefined call to "bar":
4375 An old object defines "foo" and ".foo", references ".bar" (possibly
4376 "bar" too).
4377 A new object defines "foo" and references "bar".
4378
4379 A new object thus has no problem with its undefined symbols being
4380 satisfied by definitions in an old object. On the other hand, the
4381 old object won't have ".bar" satisfied by a new object.
4382
4383 Keep a list of newly added dot-symbols. */
4384
4385 if (string[0] == '.')
4386 {
4387 struct ppc_link_hash_table *htab;
4388
4389 htab = (struct ppc_link_hash_table *) table;
4390 eh->u.next_dot_sym = htab->dot_syms;
4391 htab->dot_syms = eh;
4392 }
4393 }
4394
4395 return entry;
4396 }
4397
4398 struct tocsave_entry {
4399 asection *sec;
4400 bfd_vma offset;
4401 };
4402
4403 static hashval_t
4404 tocsave_htab_hash (const void *p)
4405 {
4406 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4407 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4408 }
4409
4410 static int
4411 tocsave_htab_eq (const void *p1, const void *p2)
4412 {
4413 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4414 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4415 return e1->sec == e2->sec && e1->offset == e2->offset;
4416 }
4417
4418 /* Destroy a ppc64 ELF linker hash table. */
4419
4420 static void
4421 ppc64_elf_link_hash_table_free (bfd *obfd)
4422 {
4423 struct ppc_link_hash_table *htab;
4424
4425 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4426 if (htab->tocsave_htab)
4427 htab_delete (htab->tocsave_htab);
4428 bfd_hash_table_free (&htab->branch_hash_table);
4429 bfd_hash_table_free (&htab->stub_hash_table);
4430 _bfd_elf_link_hash_table_free (obfd);
4431 }
4432
4433 /* Create a ppc64 ELF linker hash table. */
4434
4435 static struct bfd_link_hash_table *
4436 ppc64_elf_link_hash_table_create (bfd *abfd)
4437 {
4438 struct ppc_link_hash_table *htab;
4439 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4440
4441 htab = bfd_zmalloc (amt);
4442 if (htab == NULL)
4443 return NULL;
4444
4445 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4446 sizeof (struct ppc_link_hash_entry),
4447 PPC64_ELF_DATA))
4448 {
4449 free (htab);
4450 return NULL;
4451 }
4452
4453 /* Init the stub hash table too. */
4454 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4455 sizeof (struct ppc_stub_hash_entry)))
4456 {
4457 _bfd_elf_link_hash_table_free (abfd);
4458 return NULL;
4459 }
4460
4461 /* And the branch hash table. */
4462 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4463 sizeof (struct ppc_branch_hash_entry)))
4464 {
4465 bfd_hash_table_free (&htab->stub_hash_table);
4466 _bfd_elf_link_hash_table_free (abfd);
4467 return NULL;
4468 }
4469
4470 htab->tocsave_htab = htab_try_create (1024,
4471 tocsave_htab_hash,
4472 tocsave_htab_eq,
4473 NULL);
4474 if (htab->tocsave_htab == NULL)
4475 {
4476 ppc64_elf_link_hash_table_free (abfd);
4477 return NULL;
4478 }
4479 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4480
4481 /* Initializing two fields of the union is just cosmetic. We really
4482 only care about glist, but when compiled on a 32-bit host the
4483 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4484 debugger inspection of these fields look nicer. */
4485 htab->elf.init_got_refcount.refcount = 0;
4486 htab->elf.init_got_refcount.glist = NULL;
4487 htab->elf.init_plt_refcount.refcount = 0;
4488 htab->elf.init_plt_refcount.glist = NULL;
4489 htab->elf.init_got_offset.offset = 0;
4490 htab->elf.init_got_offset.glist = NULL;
4491 htab->elf.init_plt_offset.offset = 0;
4492 htab->elf.init_plt_offset.glist = NULL;
4493
4494 return &htab->elf.root;
4495 }
4496
4497 /* Create sections for linker generated code. */
4498
4499 static bfd_boolean
4500 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4501 {
4502 struct ppc_link_hash_table *htab;
4503 flagword flags;
4504
4505 htab = ppc_hash_table (info);
4506
4507 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4508 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4509 if (htab->params->save_restore_funcs)
4510 {
4511 /* Create .sfpr for code to save and restore fp regs. */
4512 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4513 flags);
4514 if (htab->sfpr == NULL
4515 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4516 return FALSE;
4517 }
4518
4519 if (bfd_link_relocatable (info))
4520 return TRUE;
4521
4522 /* Create .glink for lazy dynamic linking support. */
4523 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4524 flags);
4525 if (htab->glink == NULL
4526 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4527 return FALSE;
4528
4529 /* The part of .glink used by global entry stubs, separate so that
4530 it can be aligned appropriately without affecting htab->glink. */
4531 htab->global_entry = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4532 flags);
4533 if (htab->global_entry == NULL
4534 || ! bfd_set_section_alignment (dynobj, htab->global_entry, 2))
4535 return FALSE;
4536
4537 if (!info->no_ld_generated_unwind_info)
4538 {
4539 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4540 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4541 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4542 ".eh_frame",
4543 flags);
4544 if (htab->glink_eh_frame == NULL
4545 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4546 return FALSE;
4547 }
4548
4549 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4550 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4551 if (htab->elf.iplt == NULL
4552 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4553 return FALSE;
4554
4555 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4556 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4557 htab->elf.irelplt
4558 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4559 if (htab->elf.irelplt == NULL
4560 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4561 return FALSE;
4562
4563 /* Create branch lookup table for plt_branch stubs. */
4564 flags = (SEC_ALLOC | SEC_LOAD
4565 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4566 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4567 flags);
4568 if (htab->brlt == NULL
4569 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4570 return FALSE;
4571
4572 /* Local plt entries, put in .branch_lt but a separate section for
4573 convenience. */
4574 htab->pltlocal = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4575 flags);
4576 if (htab->pltlocal == NULL
4577 || ! bfd_set_section_alignment (dynobj, htab->pltlocal, 3))
4578 return FALSE;
4579
4580 if (!bfd_link_pic (info))
4581 return TRUE;
4582
4583 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4584 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4585 htab->relbrlt
4586 = bfd_make_section_anyway_with_flags (dynobj, ".rela.branch_lt", flags);
4587 if (htab->relbrlt == NULL
4588 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4589 return FALSE;
4590
4591 htab->relpltlocal
4592 = bfd_make_section_anyway_with_flags (dynobj, ".rela.branch_lt", flags);
4593 if (htab->relpltlocal == NULL
4594 || ! bfd_set_section_alignment (dynobj, htab->relpltlocal, 3))
4595 return FALSE;
4596
4597 return TRUE;
4598 }
4599
4600 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4601
4602 bfd_boolean
4603 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4604 struct ppc64_elf_params *params)
4605 {
4606 struct ppc_link_hash_table *htab;
4607
4608 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4609
4610 /* Always hook our dynamic sections into the first bfd, which is the
4611 linker created stub bfd. This ensures that the GOT header is at
4612 the start of the output TOC section. */
4613 htab = ppc_hash_table (info);
4614 htab->elf.dynobj = params->stub_bfd;
4615 htab->params = params;
4616
4617 return create_linkage_sections (htab->elf.dynobj, info);
4618 }
4619
4620 /* Build a name for an entry in the stub hash table. */
4621
4622 static char *
4623 ppc_stub_name (const asection *input_section,
4624 const asection *sym_sec,
4625 const struct ppc_link_hash_entry *h,
4626 const Elf_Internal_Rela *rel)
4627 {
4628 char *stub_name;
4629 ssize_t len;
4630
4631 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4632 offsets from a sym as a branch target? In fact, we could
4633 probably assume the addend is always zero. */
4634 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4635
4636 if (h)
4637 {
4638 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4639 stub_name = bfd_malloc (len);
4640 if (stub_name == NULL)
4641 return stub_name;
4642
4643 len = sprintf (stub_name, "%08x.%s+%x",
4644 input_section->id & 0xffffffff,
4645 h->elf.root.root.string,
4646 (int) rel->r_addend & 0xffffffff);
4647 }
4648 else
4649 {
4650 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4651 stub_name = bfd_malloc (len);
4652 if (stub_name == NULL)
4653 return stub_name;
4654
4655 len = sprintf (stub_name, "%08x.%x:%x+%x",
4656 input_section->id & 0xffffffff,
4657 sym_sec->id & 0xffffffff,
4658 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4659 (int) rel->r_addend & 0xffffffff);
4660 }
4661 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4662 stub_name[len - 2] = 0;
4663 return stub_name;
4664 }
4665
4666 /* Look up an entry in the stub hash. Stub entries are cached because
4667 creating the stub name takes a bit of time. */
4668
4669 static struct ppc_stub_hash_entry *
4670 ppc_get_stub_entry (const asection *input_section,
4671 const asection *sym_sec,
4672 struct ppc_link_hash_entry *h,
4673 const Elf_Internal_Rela *rel,
4674 struct ppc_link_hash_table *htab)
4675 {
4676 struct ppc_stub_hash_entry *stub_entry;
4677 struct map_stub *group;
4678
4679 /* If this input section is part of a group of sections sharing one
4680 stub section, then use the id of the first section in the group.
4681 Stub names need to include a section id, as there may well be
4682 more than one stub used to reach say, printf, and we need to
4683 distinguish between them. */
4684 group = htab->sec_info[input_section->id].u.group;
4685 if (group == NULL)
4686 return NULL;
4687
4688 if (h != NULL && h->u.stub_cache != NULL
4689 && h->u.stub_cache->h == h
4690 && h->u.stub_cache->group == group)
4691 {
4692 stub_entry = h->u.stub_cache;
4693 }
4694 else
4695 {
4696 char *stub_name;
4697
4698 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4699 if (stub_name == NULL)
4700 return NULL;
4701
4702 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4703 stub_name, FALSE, FALSE);
4704 if (h != NULL)
4705 h->u.stub_cache = stub_entry;
4706
4707 free (stub_name);
4708 }
4709
4710 return stub_entry;
4711 }
4712
4713 /* Add a new stub entry to the stub hash. Not all fields of the new
4714 stub entry are initialised. */
4715
4716 static struct ppc_stub_hash_entry *
4717 ppc_add_stub (const char *stub_name,
4718 asection *section,
4719 struct bfd_link_info *info)
4720 {
4721 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4722 struct map_stub *group;
4723 asection *link_sec;
4724 asection *stub_sec;
4725 struct ppc_stub_hash_entry *stub_entry;
4726
4727 group = htab->sec_info[section->id].u.group;
4728 link_sec = group->link_sec;
4729 stub_sec = group->stub_sec;
4730 if (stub_sec == NULL)
4731 {
4732 size_t namelen;
4733 bfd_size_type len;
4734 char *s_name;
4735
4736 namelen = strlen (link_sec->name);
4737 len = namelen + sizeof (STUB_SUFFIX);
4738 s_name = bfd_alloc (htab->params->stub_bfd, len);
4739 if (s_name == NULL)
4740 return NULL;
4741
4742 memcpy (s_name, link_sec->name, namelen);
4743 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4744 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4745 if (stub_sec == NULL)
4746 return NULL;
4747 group->stub_sec = stub_sec;
4748 }
4749
4750 /* Enter this entry into the linker stub hash table. */
4751 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4752 TRUE, FALSE);
4753 if (stub_entry == NULL)
4754 {
4755 /* xgettext:c-format */
4756 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
4757 section->owner, stub_name);
4758 return NULL;
4759 }
4760
4761 stub_entry->group = group;
4762 stub_entry->stub_offset = 0;
4763 return stub_entry;
4764 }
4765
4766 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4767 not already done. */
4768
4769 static bfd_boolean
4770 create_got_section (bfd *abfd, struct bfd_link_info *info)
4771 {
4772 asection *got, *relgot;
4773 flagword flags;
4774 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4775
4776 if (!is_ppc64_elf (abfd))
4777 return FALSE;
4778 if (htab == NULL)
4779 return FALSE;
4780
4781 if (!htab->elf.sgot
4782 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4783 return FALSE;
4784
4785 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4786 | SEC_LINKER_CREATED);
4787
4788 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4789 if (!got
4790 || !bfd_set_section_alignment (abfd, got, 3))
4791 return FALSE;
4792
4793 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4794 flags | SEC_READONLY);
4795 if (!relgot
4796 || ! bfd_set_section_alignment (abfd, relgot, 3))
4797 return FALSE;
4798
4799 ppc64_elf_tdata (abfd)->got = got;
4800 ppc64_elf_tdata (abfd)->relgot = relgot;
4801 return TRUE;
4802 }
4803
4804 /* Follow indirect and warning symbol links. */
4805
4806 static inline struct bfd_link_hash_entry *
4807 follow_link (struct bfd_link_hash_entry *h)
4808 {
4809 while (h->type == bfd_link_hash_indirect
4810 || h->type == bfd_link_hash_warning)
4811 h = h->u.i.link;
4812 return h;
4813 }
4814
4815 static inline struct elf_link_hash_entry *
4816 elf_follow_link (struct elf_link_hash_entry *h)
4817 {
4818 return (struct elf_link_hash_entry *) follow_link (&h->root);
4819 }
4820
4821 static inline struct ppc_link_hash_entry *
4822 ppc_follow_link (struct ppc_link_hash_entry *h)
4823 {
4824 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4825 }
4826
4827 /* Merge PLT info on FROM with that on TO. */
4828
4829 static void
4830 move_plt_plist (struct ppc_link_hash_entry *from,
4831 struct ppc_link_hash_entry *to)
4832 {
4833 if (from->elf.plt.plist != NULL)
4834 {
4835 if (to->elf.plt.plist != NULL)
4836 {
4837 struct plt_entry **entp;
4838 struct plt_entry *ent;
4839
4840 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4841 {
4842 struct plt_entry *dent;
4843
4844 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4845 if (dent->addend == ent->addend)
4846 {
4847 dent->plt.refcount += ent->plt.refcount;
4848 *entp = ent->next;
4849 break;
4850 }
4851 if (dent == NULL)
4852 entp = &ent->next;
4853 }
4854 *entp = to->elf.plt.plist;
4855 }
4856
4857 to->elf.plt.plist = from->elf.plt.plist;
4858 from->elf.plt.plist = NULL;
4859 }
4860 }
4861
4862 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4863
4864 static void
4865 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4866 struct elf_link_hash_entry *dir,
4867 struct elf_link_hash_entry *ind)
4868 {
4869 struct ppc_link_hash_entry *edir, *eind;
4870
4871 edir = (struct ppc_link_hash_entry *) dir;
4872 eind = (struct ppc_link_hash_entry *) ind;
4873
4874 edir->is_func |= eind->is_func;
4875 edir->is_func_descriptor |= eind->is_func_descriptor;
4876 edir->tls_mask |= eind->tls_mask;
4877 if (eind->oh != NULL)
4878 edir->oh = ppc_follow_link (eind->oh);
4879
4880 if (edir->elf.versioned != versioned_hidden)
4881 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4882 edir->elf.ref_regular |= eind->elf.ref_regular;
4883 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4884 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4885 edir->elf.needs_plt |= eind->elf.needs_plt;
4886 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4887
4888 /* If we were called to copy over info for a weak sym, don't copy
4889 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4890 in order to simplify readonly_dynrelocs and save a field in the
4891 symbol hash entry, but that means dyn_relocs can't be used in any
4892 tests about a specific symbol, or affect other symbol flags which
4893 are then tested. */
4894 if (eind->elf.root.type != bfd_link_hash_indirect)
4895 return;
4896
4897 /* Copy over any dynamic relocs we may have on the indirect sym. */
4898 if (eind->dyn_relocs != NULL)
4899 {
4900 if (edir->dyn_relocs != NULL)
4901 {
4902 struct elf_dyn_relocs **pp;
4903 struct elf_dyn_relocs *p;
4904
4905 /* Add reloc counts against the indirect sym to the direct sym
4906 list. Merge any entries against the same section. */
4907 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4908 {
4909 struct elf_dyn_relocs *q;
4910
4911 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4912 if (q->sec == p->sec)
4913 {
4914 q->pc_count += p->pc_count;
4915 q->count += p->count;
4916 *pp = p->next;
4917 break;
4918 }
4919 if (q == NULL)
4920 pp = &p->next;
4921 }
4922 *pp = edir->dyn_relocs;
4923 }
4924
4925 edir->dyn_relocs = eind->dyn_relocs;
4926 eind->dyn_relocs = NULL;
4927 }
4928
4929 /* Copy over got entries that we may have already seen to the
4930 symbol which just became indirect. */
4931 if (eind->elf.got.glist != NULL)
4932 {
4933 if (edir->elf.got.glist != NULL)
4934 {
4935 struct got_entry **entp;
4936 struct got_entry *ent;
4937
4938 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4939 {
4940 struct got_entry *dent;
4941
4942 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4943 if (dent->addend == ent->addend
4944 && dent->owner == ent->owner
4945 && dent->tls_type == ent->tls_type)
4946 {
4947 dent->got.refcount += ent->got.refcount;
4948 *entp = ent->next;
4949 break;
4950 }
4951 if (dent == NULL)
4952 entp = &ent->next;
4953 }
4954 *entp = edir->elf.got.glist;
4955 }
4956
4957 edir->elf.got.glist = eind->elf.got.glist;
4958 eind->elf.got.glist = NULL;
4959 }
4960
4961 /* And plt entries. */
4962 move_plt_plist (eind, edir);
4963
4964 if (eind->elf.dynindx != -1)
4965 {
4966 if (edir->elf.dynindx != -1)
4967 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4968 edir->elf.dynstr_index);
4969 edir->elf.dynindx = eind->elf.dynindx;
4970 edir->elf.dynstr_index = eind->elf.dynstr_index;
4971 eind->elf.dynindx = -1;
4972 eind->elf.dynstr_index = 0;
4973 }
4974 }
4975
4976 /* Find the function descriptor hash entry from the given function code
4977 hash entry FH. Link the entries via their OH fields. */
4978
4979 static struct ppc_link_hash_entry *
4980 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4981 {
4982 struct ppc_link_hash_entry *fdh = fh->oh;
4983
4984 if (fdh == NULL)
4985 {
4986 const char *fd_name = fh->elf.root.root.string + 1;
4987
4988 fdh = (struct ppc_link_hash_entry *)
4989 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4990 if (fdh == NULL)
4991 return fdh;
4992
4993 fdh->is_func_descriptor = 1;
4994 fdh->oh = fh;
4995 fh->is_func = 1;
4996 fh->oh = fdh;
4997 }
4998
4999 fdh = ppc_follow_link (fdh);
5000 fdh->is_func_descriptor = 1;
5001 fdh->oh = fh;
5002 return fdh;
5003 }
5004
5005 /* Make a fake function descriptor sym for the undefined code sym FH. */
5006
5007 static struct ppc_link_hash_entry *
5008 make_fdh (struct bfd_link_info *info,
5009 struct ppc_link_hash_entry *fh)
5010 {
5011 bfd *abfd = fh->elf.root.u.undef.abfd;
5012 struct bfd_link_hash_entry *bh = NULL;
5013 struct ppc_link_hash_entry *fdh;
5014 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
5015 ? BSF_WEAK
5016 : BSF_GLOBAL);
5017
5018 if (!_bfd_generic_link_add_one_symbol (info, abfd,
5019 fh->elf.root.root.string + 1,
5020 flags, bfd_und_section_ptr, 0,
5021 NULL, FALSE, FALSE, &bh))
5022 return NULL;
5023
5024 fdh = (struct ppc_link_hash_entry *) bh;
5025 fdh->elf.non_elf = 0;
5026 fdh->fake = 1;
5027 fdh->is_func_descriptor = 1;
5028 fdh->oh = fh;
5029 fh->is_func = 1;
5030 fh->oh = fdh;
5031 return fdh;
5032 }
5033
5034 /* Fix function descriptor symbols defined in .opd sections to be
5035 function type. */
5036
5037 static bfd_boolean
5038 ppc64_elf_add_symbol_hook (bfd *ibfd,
5039 struct bfd_link_info *info,
5040 Elf_Internal_Sym *isym,
5041 const char **name,
5042 flagword *flags ATTRIBUTE_UNUSED,
5043 asection **sec,
5044 bfd_vma *value)
5045 {
5046 if (*sec != NULL
5047 && strcmp ((*sec)->name, ".opd") == 0)
5048 {
5049 asection *code_sec;
5050
5051 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
5052 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
5053 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
5054
5055 /* If the symbol is a function defined in .opd, and the function
5056 code is in a discarded group, let it appear to be undefined. */
5057 if (!bfd_link_relocatable (info)
5058 && (*sec)->reloc_count != 0
5059 && opd_entry_value (*sec, *value, &code_sec, NULL,
5060 FALSE) != (bfd_vma) -1
5061 && discarded_section (code_sec))
5062 {
5063 *sec = bfd_und_section_ptr;
5064 isym->st_shndx = SHN_UNDEF;
5065 }
5066 }
5067 else if (*sec != NULL
5068 && strcmp ((*sec)->name, ".toc") == 0
5069 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
5070 {
5071 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5072 if (htab != NULL)
5073 htab->params->object_in_toc = 1;
5074 }
5075
5076 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5077 {
5078 if (abiversion (ibfd) == 0)
5079 set_abiversion (ibfd, 2);
5080 else if (abiversion (ibfd) == 1)
5081 {
5082 _bfd_error_handler (_("symbol '%s' has invalid st_other"
5083 " for ABI version 1"), *name);
5084 bfd_set_error (bfd_error_bad_value);
5085 return FALSE;
5086 }
5087 }
5088
5089 return TRUE;
5090 }
5091
5092 /* Merge non-visibility st_other attributes: local entry point. */
5093
5094 static void
5095 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5096 const Elf_Internal_Sym *isym,
5097 bfd_boolean definition,
5098 bfd_boolean dynamic)
5099 {
5100 if (definition && (!dynamic || !h->def_regular))
5101 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5102 | ELF_ST_VISIBILITY (h->other));
5103 }
5104
5105 /* Hook called on merging a symbol. We use this to clear "fake" since
5106 we now have a real symbol. */
5107
5108 static bfd_boolean
5109 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5110 const Elf_Internal_Sym *isym,
5111 asection **psec ATTRIBUTE_UNUSED,
5112 bfd_boolean newdef ATTRIBUTE_UNUSED,
5113 bfd_boolean olddef ATTRIBUTE_UNUSED,
5114 bfd *oldbfd ATTRIBUTE_UNUSED,
5115 const asection *oldsec ATTRIBUTE_UNUSED)
5116 {
5117 ((struct ppc_link_hash_entry *) h)->fake = 0;
5118 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5119 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5120 return TRUE;
5121 }
5122
5123 /* This function makes an old ABI object reference to ".bar" cause the
5124 inclusion of a new ABI object archive that defines "bar".
5125 NAME is a symbol defined in an archive. Return a symbol in the hash
5126 table that might be satisfied by the archive symbols. */
5127
5128 static struct elf_link_hash_entry *
5129 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5130 struct bfd_link_info *info,
5131 const char *name)
5132 {
5133 struct elf_link_hash_entry *h;
5134 char *dot_name;
5135 size_t len;
5136
5137 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5138 if (h != NULL
5139 /* Don't return this sym if it is a fake function descriptor
5140 created by add_symbol_adjust. */
5141 && !((struct ppc_link_hash_entry *) h)->fake)
5142 return h;
5143
5144 if (name[0] == '.')
5145 return h;
5146
5147 len = strlen (name);
5148 dot_name = bfd_alloc (abfd, len + 2);
5149 if (dot_name == NULL)
5150 return (struct elf_link_hash_entry *) -1;
5151 dot_name[0] = '.';
5152 memcpy (dot_name + 1, name, len + 1);
5153 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5154 bfd_release (abfd, dot_name);
5155 return h;
5156 }
5157
5158 /* This function satisfies all old ABI object references to ".bar" if a
5159 new ABI object defines "bar". Well, at least, undefined dot symbols
5160 are made weak. This stops later archive searches from including an
5161 object if we already have a function descriptor definition. It also
5162 prevents the linker complaining about undefined symbols.
5163 We also check and correct mismatched symbol visibility here. The
5164 most restrictive visibility of the function descriptor and the
5165 function entry symbol is used. */
5166
5167 static bfd_boolean
5168 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5169 {
5170 struct ppc_link_hash_table *htab;
5171 struct ppc_link_hash_entry *fdh;
5172
5173 if (eh->elf.root.type == bfd_link_hash_warning)
5174 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5175
5176 if (eh->elf.root.type == bfd_link_hash_indirect)
5177 return TRUE;
5178
5179 if (eh->elf.root.root.string[0] != '.')
5180 abort ();
5181
5182 htab = ppc_hash_table (info);
5183 if (htab == NULL)
5184 return FALSE;
5185
5186 fdh = lookup_fdh (eh, htab);
5187 if (fdh == NULL
5188 && !bfd_link_relocatable (info)
5189 && (eh->elf.root.type == bfd_link_hash_undefined
5190 || eh->elf.root.type == bfd_link_hash_undefweak)
5191 && eh->elf.ref_regular)
5192 {
5193 /* Make an undefined function descriptor sym, in order to
5194 pull in an --as-needed shared lib. Archives are handled
5195 elsewhere. */
5196 fdh = make_fdh (info, eh);
5197 if (fdh == NULL)
5198 return FALSE;
5199 }
5200
5201 if (fdh != NULL)
5202 {
5203 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5204 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5205
5206 /* Make both descriptor and entry symbol have the most
5207 constraining visibility of either symbol. */
5208 if (entry_vis < descr_vis)
5209 fdh->elf.other += entry_vis - descr_vis;
5210 else if (entry_vis > descr_vis)
5211 eh->elf.other += descr_vis - entry_vis;
5212
5213 /* Propagate reference flags from entry symbol to function
5214 descriptor symbol. */
5215 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5216 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5217 fdh->elf.ref_regular |= eh->elf.ref_regular;
5218 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5219
5220 if (!fdh->elf.forced_local
5221 && fdh->elf.dynindx == -1
5222 && fdh->elf.versioned != versioned_hidden
5223 && (bfd_link_dll (info)
5224 || fdh->elf.def_dynamic
5225 || fdh->elf.ref_dynamic)
5226 && (eh->elf.ref_regular
5227 || eh->elf.def_regular))
5228 {
5229 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5230 return FALSE;
5231 }
5232 }
5233
5234 return TRUE;
5235 }
5236
5237 /* Set up opd section info and abiversion for IBFD, and process list
5238 of dot-symbols we made in link_hash_newfunc. */
5239
5240 static bfd_boolean
5241 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5242 {
5243 struct ppc_link_hash_table *htab;
5244 struct ppc_link_hash_entry **p, *eh;
5245 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5246
5247 if (opd != NULL && opd->size != 0)
5248 {
5249 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5250 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5251
5252 if (abiversion (ibfd) == 0)
5253 set_abiversion (ibfd, 1);
5254 else if (abiversion (ibfd) >= 2)
5255 {
5256 /* xgettext:c-format */
5257 _bfd_error_handler (_("%pB .opd not allowed in ABI version %d"),
5258 ibfd, abiversion (ibfd));
5259 bfd_set_error (bfd_error_bad_value);
5260 return FALSE;
5261 }
5262 }
5263
5264 if (is_ppc64_elf (info->output_bfd))
5265 {
5266 /* For input files without an explicit abiversion in e_flags
5267 we should have flagged any with symbol st_other bits set
5268 as ELFv1 and above flagged those with .opd as ELFv2.
5269 Set the output abiversion if not yet set, and for any input
5270 still ambiguous, take its abiversion from the output.
5271 Differences in ABI are reported later. */
5272 if (abiversion (info->output_bfd) == 0)
5273 set_abiversion (info->output_bfd, abiversion (ibfd));
5274 else if (abiversion (ibfd) == 0)
5275 set_abiversion (ibfd, abiversion (info->output_bfd));
5276 }
5277
5278 htab = ppc_hash_table (info);
5279 if (htab == NULL)
5280 return TRUE;
5281
5282 if (opd != NULL && opd->size != 0
5283 && (ibfd->flags & DYNAMIC) == 0
5284 && (opd->flags & SEC_RELOC) != 0
5285 && opd->reloc_count != 0
5286 && !bfd_is_abs_section (opd->output_section)
5287 && info->gc_sections)
5288 {
5289 /* Garbage collection needs some extra help with .opd sections.
5290 We don't want to necessarily keep everything referenced by
5291 relocs in .opd, as that would keep all functions. Instead,
5292 if we reference an .opd symbol (a function descriptor), we
5293 want to keep the function code symbol's section. This is
5294 easy for global symbols, but for local syms we need to keep
5295 information about the associated function section. */
5296 bfd_size_type amt;
5297 asection **opd_sym_map;
5298 Elf_Internal_Shdr *symtab_hdr;
5299 Elf_Internal_Rela *relocs, *rel_end, *rel;
5300
5301 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5302 opd_sym_map = bfd_zalloc (ibfd, amt);
5303 if (opd_sym_map == NULL)
5304 return FALSE;
5305 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5306 relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL,
5307 info->keep_memory);
5308 if (relocs == NULL)
5309 return FALSE;
5310 symtab_hdr = &elf_symtab_hdr (ibfd);
5311 rel_end = relocs + opd->reloc_count - 1;
5312 for (rel = relocs; rel < rel_end; rel++)
5313 {
5314 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
5315 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
5316
5317 if (r_type == R_PPC64_ADDR64
5318 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC
5319 && r_symndx < symtab_hdr->sh_info)
5320 {
5321 Elf_Internal_Sym *isym;
5322 asection *s;
5323
5324 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx);
5325 if (isym == NULL)
5326 {
5327 if (elf_section_data (opd)->relocs != relocs)
5328 free (relocs);
5329 return FALSE;
5330 }
5331
5332 s = bfd_section_from_elf_index (ibfd, isym->st_shndx);
5333 if (s != NULL && s != opd)
5334 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5335 }
5336 }
5337 if (elf_section_data (opd)->relocs != relocs)
5338 free (relocs);
5339 }
5340
5341 p = &htab->dot_syms;
5342 while ((eh = *p) != NULL)
5343 {
5344 *p = NULL;
5345 if (&eh->elf == htab->elf.hgot)
5346 ;
5347 else if (htab->elf.hgot == NULL
5348 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5349 htab->elf.hgot = &eh->elf;
5350 else if (abiversion (ibfd) <= 1)
5351 {
5352 htab->need_func_desc_adj = 1;
5353 if (!add_symbol_adjust (eh, info))
5354 return FALSE;
5355 }
5356 p = &eh->u.next_dot_sym;
5357 }
5358 return TRUE;
5359 }
5360
5361 /* Undo hash table changes when an --as-needed input file is determined
5362 not to be needed. */
5363
5364 static bfd_boolean
5365 ppc64_elf_notice_as_needed (bfd *ibfd,
5366 struct bfd_link_info *info,
5367 enum notice_asneeded_action act)
5368 {
5369 if (act == notice_not_needed)
5370 {
5371 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5372
5373 if (htab == NULL)
5374 return FALSE;
5375
5376 htab->dot_syms = NULL;
5377 }
5378 return _bfd_elf_notice_as_needed (ibfd, info, act);
5379 }
5380
5381 /* If --just-symbols against a final linked binary, then assume we need
5382 toc adjusting stubs when calling functions defined there. */
5383
5384 static void
5385 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5386 {
5387 if ((sec->flags & SEC_CODE) != 0
5388 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5389 && is_ppc64_elf (sec->owner))
5390 {
5391 if (abiversion (sec->owner) >= 2
5392 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5393 sec->has_toc_reloc = 1;
5394 }
5395 _bfd_elf_link_just_syms (sec, info);
5396 }
5397
5398 static struct plt_entry **
5399 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5400 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5401 {
5402 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5403 struct plt_entry **local_plt;
5404 unsigned char *local_got_tls_masks;
5405
5406 if (local_got_ents == NULL)
5407 {
5408 bfd_size_type size = symtab_hdr->sh_info;
5409
5410 size *= (sizeof (*local_got_ents)
5411 + sizeof (*local_plt)
5412 + sizeof (*local_got_tls_masks));
5413 local_got_ents = bfd_zalloc (abfd, size);
5414 if (local_got_ents == NULL)
5415 return NULL;
5416 elf_local_got_ents (abfd) = local_got_ents;
5417 }
5418
5419 if ((tls_type & (NON_GOT | TLS_EXPLICIT)) == 0)
5420 {
5421 struct got_entry *ent;
5422
5423 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5424 if (ent->addend == r_addend
5425 && ent->owner == abfd
5426 && ent->tls_type == tls_type)
5427 break;
5428 if (ent == NULL)
5429 {
5430 bfd_size_type amt = sizeof (*ent);
5431 ent = bfd_alloc (abfd, amt);
5432 if (ent == NULL)
5433 return FALSE;
5434 ent->next = local_got_ents[r_symndx];
5435 ent->addend = r_addend;
5436 ent->owner = abfd;
5437 ent->tls_type = tls_type;
5438 ent->is_indirect = FALSE;
5439 ent->got.refcount = 0;
5440 local_got_ents[r_symndx] = ent;
5441 }
5442 ent->got.refcount += 1;
5443 }
5444
5445 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5446 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5447 local_got_tls_masks[r_symndx] |= tls_type & 0xff;
5448
5449 return local_plt + r_symndx;
5450 }
5451
5452 static bfd_boolean
5453 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5454 {
5455 struct plt_entry *ent;
5456
5457 for (ent = *plist; ent != NULL; ent = ent->next)
5458 if (ent->addend == addend)
5459 break;
5460 if (ent == NULL)
5461 {
5462 bfd_size_type amt = sizeof (*ent);
5463 ent = bfd_alloc (abfd, amt);
5464 if (ent == NULL)
5465 return FALSE;
5466 ent->next = *plist;
5467 ent->addend = addend;
5468 ent->plt.refcount = 0;
5469 *plist = ent;
5470 }
5471 ent->plt.refcount += 1;
5472 return TRUE;
5473 }
5474
5475 static bfd_boolean
5476 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5477 {
5478 return (r_type == R_PPC64_REL24
5479 || r_type == R_PPC64_REL14
5480 || r_type == R_PPC64_REL14_BRTAKEN
5481 || r_type == R_PPC64_REL14_BRNTAKEN
5482 || r_type == R_PPC64_ADDR24
5483 || r_type == R_PPC64_ADDR14
5484 || r_type == R_PPC64_ADDR14_BRTAKEN
5485 || r_type == R_PPC64_ADDR14_BRNTAKEN
5486 || r_type == R_PPC64_PLTCALL);
5487 }
5488
5489 /* Relocs on inline plt call sequence insns prior to the call. */
5490
5491 static bfd_boolean
5492 is_plt_seq_reloc (enum elf_ppc64_reloc_type r_type)
5493 {
5494 return (r_type == R_PPC64_PLT16_HA
5495 || r_type == R_PPC64_PLT16_HI
5496 || r_type == R_PPC64_PLT16_LO
5497 || r_type == R_PPC64_PLT16_LO_DS
5498 || r_type == R_PPC64_PLTSEQ);
5499 }
5500
5501 /* Look through the relocs for a section during the first phase, and
5502 calculate needed space in the global offset table, procedure
5503 linkage table, and dynamic reloc sections. */
5504
5505 static bfd_boolean
5506 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5507 asection *sec, const Elf_Internal_Rela *relocs)
5508 {
5509 struct ppc_link_hash_table *htab;
5510 Elf_Internal_Shdr *symtab_hdr;
5511 struct elf_link_hash_entry **sym_hashes;
5512 const Elf_Internal_Rela *rel;
5513 const Elf_Internal_Rela *rel_end;
5514 asection *sreloc;
5515 struct elf_link_hash_entry *tga, *dottga;
5516 bfd_boolean is_opd;
5517
5518 if (bfd_link_relocatable (info))
5519 return TRUE;
5520
5521 /* Don't do anything special with non-loaded, non-alloced sections.
5522 In particular, any relocs in such sections should not affect GOT
5523 and PLT reference counting (ie. we don't allow them to create GOT
5524 or PLT entries), there's no possibility or desire to optimize TLS
5525 relocs, and there's not much point in propagating relocs to shared
5526 libs that the dynamic linker won't relocate. */
5527 if ((sec->flags & SEC_ALLOC) == 0)
5528 return TRUE;
5529
5530 BFD_ASSERT (is_ppc64_elf (abfd));
5531
5532 htab = ppc_hash_table (info);
5533 if (htab == NULL)
5534 return FALSE;
5535
5536 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5537 FALSE, FALSE, TRUE);
5538 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5539 FALSE, FALSE, TRUE);
5540 symtab_hdr = &elf_symtab_hdr (abfd);
5541 sym_hashes = elf_sym_hashes (abfd);
5542 sreloc = NULL;
5543 is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd;
5544 rel_end = relocs + sec->reloc_count;
5545 for (rel = relocs; rel < rel_end; rel++)
5546 {
5547 unsigned long r_symndx;
5548 struct elf_link_hash_entry *h;
5549 enum elf_ppc64_reloc_type r_type;
5550 int tls_type;
5551 struct _ppc64_elf_section_data *ppc64_sec;
5552 struct plt_entry **ifunc, **plt_list;
5553
5554 r_symndx = ELF64_R_SYM (rel->r_info);
5555 if (r_symndx < symtab_hdr->sh_info)
5556 h = NULL;
5557 else
5558 {
5559 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5560 h = elf_follow_link (h);
5561
5562 if (h == htab->elf.hgot)
5563 sec->has_toc_reloc = 1;
5564 }
5565
5566 tls_type = 0;
5567 ifunc = NULL;
5568 if (h != NULL)
5569 {
5570 if (h->type == STT_GNU_IFUNC)
5571 {
5572 h->needs_plt = 1;
5573 ifunc = &h->plt.plist;
5574 }
5575 }
5576 else
5577 {
5578 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5579 abfd, r_symndx);
5580 if (isym == NULL)
5581 return FALSE;
5582
5583 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5584 {
5585 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5586 rel->r_addend,
5587 NON_GOT | PLT_IFUNC);
5588 if (ifunc == NULL)
5589 return FALSE;
5590 }
5591 }
5592
5593 r_type = ELF64_R_TYPE (rel->r_info);
5594 switch (r_type)
5595 {
5596 case R_PPC64_TLSGD:
5597 case R_PPC64_TLSLD:
5598 /* These special tls relocs tie a call to __tls_get_addr with
5599 its parameter symbol. */
5600 if (h != NULL)
5601 ((struct ppc_link_hash_entry *) h)->tls_mask |= TLS_TLS | TLS_MARK;
5602 else
5603 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5604 rel->r_addend,
5605 NON_GOT | TLS_TLS | TLS_MARK))
5606 return FALSE;
5607 sec->has_tls_reloc = 1;
5608 break;
5609
5610 case R_PPC64_GOT_TLSLD16:
5611 case R_PPC64_GOT_TLSLD16_LO:
5612 case R_PPC64_GOT_TLSLD16_HI:
5613 case R_PPC64_GOT_TLSLD16_HA:
5614 tls_type = TLS_TLS | TLS_LD;
5615 goto dogottls;
5616
5617 case R_PPC64_GOT_TLSGD16:
5618 case R_PPC64_GOT_TLSGD16_LO:
5619 case R_PPC64_GOT_TLSGD16_HI:
5620 case R_PPC64_GOT_TLSGD16_HA:
5621 tls_type = TLS_TLS | TLS_GD;
5622 goto dogottls;
5623
5624 case R_PPC64_GOT_TPREL16_DS:
5625 case R_PPC64_GOT_TPREL16_LO_DS:
5626 case R_PPC64_GOT_TPREL16_HI:
5627 case R_PPC64_GOT_TPREL16_HA:
5628 if (bfd_link_dll (info))
5629 info->flags |= DF_STATIC_TLS;
5630 tls_type = TLS_TLS | TLS_TPREL;
5631 goto dogottls;
5632
5633 case R_PPC64_GOT_DTPREL16_DS:
5634 case R_PPC64_GOT_DTPREL16_LO_DS:
5635 case R_PPC64_GOT_DTPREL16_HI:
5636 case R_PPC64_GOT_DTPREL16_HA:
5637 tls_type = TLS_TLS | TLS_DTPREL;
5638 dogottls:
5639 sec->has_tls_reloc = 1;
5640 /* Fall through */
5641
5642 case R_PPC64_GOT16:
5643 case R_PPC64_GOT16_DS:
5644 case R_PPC64_GOT16_HA:
5645 case R_PPC64_GOT16_HI:
5646 case R_PPC64_GOT16_LO:
5647 case R_PPC64_GOT16_LO_DS:
5648 /* This symbol requires a global offset table entry. */
5649 sec->has_toc_reloc = 1;
5650 if (r_type == R_PPC64_GOT_TLSLD16
5651 || r_type == R_PPC64_GOT_TLSGD16
5652 || r_type == R_PPC64_GOT_TPREL16_DS
5653 || r_type == R_PPC64_GOT_DTPREL16_DS
5654 || r_type == R_PPC64_GOT16
5655 || r_type == R_PPC64_GOT16_DS)
5656 {
5657 htab->do_multi_toc = 1;
5658 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5659 }
5660
5661 if (ppc64_elf_tdata (abfd)->got == NULL
5662 && !create_got_section (abfd, info))
5663 return FALSE;
5664
5665 if (h != NULL)
5666 {
5667 struct ppc_link_hash_entry *eh;
5668 struct got_entry *ent;
5669
5670 eh = (struct ppc_link_hash_entry *) h;
5671 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5672 if (ent->addend == rel->r_addend
5673 && ent->owner == abfd
5674 && ent->tls_type == tls_type)
5675 break;
5676 if (ent == NULL)
5677 {
5678 bfd_size_type amt = sizeof (*ent);
5679 ent = bfd_alloc (abfd, amt);
5680 if (ent == NULL)
5681 return FALSE;
5682 ent->next = eh->elf.got.glist;
5683 ent->addend = rel->r_addend;
5684 ent->owner = abfd;
5685 ent->tls_type = tls_type;
5686 ent->is_indirect = FALSE;
5687 ent->got.refcount = 0;
5688 eh->elf.got.glist = ent;
5689 }
5690 ent->got.refcount += 1;
5691 eh->tls_mask |= tls_type;
5692 }
5693 else
5694 /* This is a global offset table entry for a local symbol. */
5695 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5696 rel->r_addend, tls_type))
5697 return FALSE;
5698
5699 /* We may also need a plt entry if the symbol turns out to be
5700 an ifunc. */
5701 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5702 {
5703 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5704 return FALSE;
5705 }
5706 break;
5707
5708 case R_PPC64_PLT16_HA:
5709 case R_PPC64_PLT16_HI:
5710 case R_PPC64_PLT16_LO:
5711 case R_PPC64_PLT16_LO_DS:
5712 case R_PPC64_PLT32:
5713 case R_PPC64_PLT64:
5714 /* This symbol requires a procedure linkage table entry. */
5715 plt_list = ifunc;
5716 if (h != NULL)
5717 {
5718 h->needs_plt = 1;
5719 if (h->root.root.string[0] == '.'
5720 && h->root.root.string[1] != '\0')
5721 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5722 ((struct ppc_link_hash_entry *) h)->tls_mask |= PLT_KEEP;
5723 plt_list = &h->plt.plist;
5724 }
5725 if (plt_list == NULL)
5726 plt_list = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5727 rel->r_addend,
5728 NON_GOT | PLT_KEEP);
5729 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5730 return FALSE;
5731 break;
5732
5733 /* The following relocations don't need to propagate the
5734 relocation if linking a shared object since they are
5735 section relative. */
5736 case R_PPC64_SECTOFF:
5737 case R_PPC64_SECTOFF_LO:
5738 case R_PPC64_SECTOFF_HI:
5739 case R_PPC64_SECTOFF_HA:
5740 case R_PPC64_SECTOFF_DS:
5741 case R_PPC64_SECTOFF_LO_DS:
5742 case R_PPC64_DTPREL16:
5743 case R_PPC64_DTPREL16_LO:
5744 case R_PPC64_DTPREL16_HI:
5745 case R_PPC64_DTPREL16_HA:
5746 case R_PPC64_DTPREL16_DS:
5747 case R_PPC64_DTPREL16_LO_DS:
5748 case R_PPC64_DTPREL16_HIGH:
5749 case R_PPC64_DTPREL16_HIGHA:
5750 case R_PPC64_DTPREL16_HIGHER:
5751 case R_PPC64_DTPREL16_HIGHERA:
5752 case R_PPC64_DTPREL16_HIGHEST:
5753 case R_PPC64_DTPREL16_HIGHESTA:
5754 break;
5755
5756 /* Nor do these. */
5757 case R_PPC64_REL16:
5758 case R_PPC64_REL16_LO:
5759 case R_PPC64_REL16_HI:
5760 case R_PPC64_REL16_HA:
5761 case R_PPC64_REL16DX_HA:
5762 break;
5763
5764 /* Not supported as a dynamic relocation. */
5765 case R_PPC64_ADDR64_LOCAL:
5766 if (bfd_link_pic (info))
5767 {
5768 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5769 ppc_howto_init ();
5770 /* xgettext:c-format */
5771 info->callbacks->einfo (_("%H: %s reloc unsupported "
5772 "in shared libraries and PIEs\n"),
5773 abfd, sec, rel->r_offset,
5774 ppc64_elf_howto_table[r_type]->name);
5775 bfd_set_error (bfd_error_bad_value);
5776 return FALSE;
5777 }
5778 break;
5779
5780 case R_PPC64_TOC16:
5781 case R_PPC64_TOC16_DS:
5782 htab->do_multi_toc = 1;
5783 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5784 /* Fall through. */
5785 case R_PPC64_TOC16_LO:
5786 case R_PPC64_TOC16_HI:
5787 case R_PPC64_TOC16_HA:
5788 case R_PPC64_TOC16_LO_DS:
5789 sec->has_toc_reloc = 1;
5790 break;
5791
5792 /* Marker reloc. */
5793 case R_PPC64_ENTRY:
5794 break;
5795
5796 /* This relocation describes the C++ object vtable hierarchy.
5797 Reconstruct it for later use during GC. */
5798 case R_PPC64_GNU_VTINHERIT:
5799 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5800 return FALSE;
5801 break;
5802
5803 /* This relocation describes which C++ vtable entries are actually
5804 used. Record for later use during GC. */
5805 case R_PPC64_GNU_VTENTRY:
5806 BFD_ASSERT (h != NULL);
5807 if (h != NULL
5808 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5809 return FALSE;
5810 break;
5811
5812 case R_PPC64_REL14:
5813 case R_PPC64_REL14_BRTAKEN:
5814 case R_PPC64_REL14_BRNTAKEN:
5815 {
5816 asection *dest = NULL;
5817
5818 /* Heuristic: If jumping outside our section, chances are
5819 we are going to need a stub. */
5820 if (h != NULL)
5821 {
5822 /* If the sym is weak it may be overridden later, so
5823 don't assume we know where a weak sym lives. */
5824 if (h->root.type == bfd_link_hash_defined)
5825 dest = h->root.u.def.section;
5826 }
5827 else
5828 {
5829 Elf_Internal_Sym *isym;
5830
5831 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5832 abfd, r_symndx);
5833 if (isym == NULL)
5834 return FALSE;
5835
5836 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5837 }
5838
5839 if (dest != sec)
5840 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5841 }
5842 goto rel24;
5843
5844 case R_PPC64_PLTCALL:
5845 ppc64_elf_section_data (sec)->has_pltcall = 1;
5846 /* Fall through. */
5847
5848 case R_PPC64_REL24:
5849 rel24:
5850 plt_list = ifunc;
5851 if (h != NULL)
5852 {
5853 h->needs_plt = 1;
5854 if (h->root.root.string[0] == '.'
5855 && h->root.root.string[1] != '\0')
5856 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5857
5858 if (h == tga || h == dottga)
5859 {
5860 sec->has_tls_reloc = 1;
5861 if (rel != relocs
5862 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5863 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5864 /* We have a new-style __tls_get_addr call with
5865 a marker reloc. */
5866 ;
5867 else
5868 /* Mark this section as having an old-style call. */
5869 sec->has_tls_get_addr_call = 1;
5870 }
5871 plt_list = &h->plt.plist;
5872 }
5873
5874 /* We may need a .plt entry if the function this reloc
5875 refers to is in a shared lib. */
5876 if (plt_list
5877 && !update_plt_info (abfd, plt_list, rel->r_addend))
5878 return FALSE;
5879 break;
5880
5881 case R_PPC64_ADDR14:
5882 case R_PPC64_ADDR14_BRNTAKEN:
5883 case R_PPC64_ADDR14_BRTAKEN:
5884 case R_PPC64_ADDR24:
5885 goto dodyn;
5886
5887 case R_PPC64_TPREL64:
5888 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5889 if (bfd_link_dll (info))
5890 info->flags |= DF_STATIC_TLS;
5891 goto dotlstoc;
5892
5893 case R_PPC64_DTPMOD64:
5894 if (rel + 1 < rel_end
5895 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5896 && rel[1].r_offset == rel->r_offset + 8)
5897 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5898 else
5899 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5900 goto dotlstoc;
5901
5902 case R_PPC64_DTPREL64:
5903 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5904 if (rel != relocs
5905 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5906 && rel[-1].r_offset == rel->r_offset - 8)
5907 /* This is the second reloc of a dtpmod, dtprel pair.
5908 Don't mark with TLS_DTPREL. */
5909 goto dodyn;
5910
5911 dotlstoc:
5912 sec->has_tls_reloc = 1;
5913 if (h != NULL)
5914 {
5915 struct ppc_link_hash_entry *eh;
5916 eh = (struct ppc_link_hash_entry *) h;
5917 eh->tls_mask |= tls_type;
5918 }
5919 else
5920 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5921 rel->r_addend, tls_type))
5922 return FALSE;
5923
5924 ppc64_sec = ppc64_elf_section_data (sec);
5925 if (ppc64_sec->sec_type != sec_toc)
5926 {
5927 bfd_size_type amt;
5928
5929 /* One extra to simplify get_tls_mask. */
5930 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5931 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5932 if (ppc64_sec->u.toc.symndx == NULL)
5933 return FALSE;
5934 amt = sec->size * sizeof (bfd_vma) / 8;
5935 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5936 if (ppc64_sec->u.toc.add == NULL)
5937 return FALSE;
5938 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5939 ppc64_sec->sec_type = sec_toc;
5940 }
5941 BFD_ASSERT (rel->r_offset % 8 == 0);
5942 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5943 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5944
5945 /* Mark the second slot of a GD or LD entry.
5946 -1 to indicate GD and -2 to indicate LD. */
5947 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5948 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5949 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5950 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5951 goto dodyn;
5952
5953 case R_PPC64_TPREL16:
5954 case R_PPC64_TPREL16_LO:
5955 case R_PPC64_TPREL16_HI:
5956 case R_PPC64_TPREL16_HA:
5957 case R_PPC64_TPREL16_DS:
5958 case R_PPC64_TPREL16_LO_DS:
5959 case R_PPC64_TPREL16_HIGH:
5960 case R_PPC64_TPREL16_HIGHA:
5961 case R_PPC64_TPREL16_HIGHER:
5962 case R_PPC64_TPREL16_HIGHERA:
5963 case R_PPC64_TPREL16_HIGHEST:
5964 case R_PPC64_TPREL16_HIGHESTA:
5965 if (bfd_link_dll (info))
5966 info->flags |= DF_STATIC_TLS;
5967 goto dodyn;
5968
5969 case R_PPC64_ADDR64:
5970 if (is_opd
5971 && rel + 1 < rel_end
5972 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5973 {
5974 if (h != NULL)
5975 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5976 }
5977 /* Fall through. */
5978
5979 case R_PPC64_ADDR16:
5980 case R_PPC64_ADDR16_DS:
5981 case R_PPC64_ADDR16_HA:
5982 case R_PPC64_ADDR16_HI:
5983 case R_PPC64_ADDR16_HIGH:
5984 case R_PPC64_ADDR16_HIGHA:
5985 case R_PPC64_ADDR16_HIGHER:
5986 case R_PPC64_ADDR16_HIGHERA:
5987 case R_PPC64_ADDR16_HIGHEST:
5988 case R_PPC64_ADDR16_HIGHESTA:
5989 case R_PPC64_ADDR16_LO:
5990 case R_PPC64_ADDR16_LO_DS:
5991 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5992 && rel->r_addend == 0)
5993 {
5994 /* We may need a .plt entry if this reloc refers to a
5995 function in a shared lib. */
5996 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5997 return FALSE;
5998 h->pointer_equality_needed = 1;
5999 }
6000 /* Fall through. */
6001
6002 case R_PPC64_REL30:
6003 case R_PPC64_REL32:
6004 case R_PPC64_REL64:
6005 case R_PPC64_ADDR32:
6006 case R_PPC64_UADDR16:
6007 case R_PPC64_UADDR32:
6008 case R_PPC64_UADDR64:
6009 case R_PPC64_TOC:
6010 if (h != NULL && !bfd_link_pic (info))
6011 /* We may need a copy reloc. */
6012 h->non_got_ref = 1;
6013
6014 /* Don't propagate .opd relocs. */
6015 if (NO_OPD_RELOCS && is_opd)
6016 break;
6017
6018 /* If we are creating a shared library, and this is a reloc
6019 against a global symbol, or a non PC relative reloc
6020 against a local symbol, then we need to copy the reloc
6021 into the shared library. However, if we are linking with
6022 -Bsymbolic, we do not need to copy a reloc against a
6023 global symbol which is defined in an object we are
6024 including in the link (i.e., DEF_REGULAR is set). At
6025 this point we have not seen all the input files, so it is
6026 possible that DEF_REGULAR is not set now but will be set
6027 later (it is never cleared). In case of a weak definition,
6028 DEF_REGULAR may be cleared later by a strong definition in
6029 a shared library. We account for that possibility below by
6030 storing information in the dyn_relocs field of the hash
6031 table entry. A similar situation occurs when creating
6032 shared libraries and symbol visibility changes render the
6033 symbol local.
6034
6035 If on the other hand, we are creating an executable, we
6036 may need to keep relocations for symbols satisfied by a
6037 dynamic library if we manage to avoid copy relocs for the
6038 symbol. */
6039 dodyn:
6040 if ((bfd_link_pic (info)
6041 && (must_be_dyn_reloc (info, r_type)
6042 || (h != NULL
6043 && (!SYMBOLIC_BIND (info, h)
6044 || h->root.type == bfd_link_hash_defweak
6045 || !h->def_regular))))
6046 || (ELIMINATE_COPY_RELOCS
6047 && !bfd_link_pic (info)
6048 && h != NULL
6049 && (h->root.type == bfd_link_hash_defweak
6050 || !h->def_regular))
6051 || (!bfd_link_pic (info)
6052 && ifunc != NULL))
6053 {
6054 /* We must copy these reloc types into the output file.
6055 Create a reloc section in dynobj and make room for
6056 this reloc. */
6057 if (sreloc == NULL)
6058 {
6059 sreloc = _bfd_elf_make_dynamic_reloc_section
6060 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
6061
6062 if (sreloc == NULL)
6063 return FALSE;
6064 }
6065
6066 /* If this is a global symbol, we count the number of
6067 relocations we need for this symbol. */
6068 if (h != NULL)
6069 {
6070 struct elf_dyn_relocs *p;
6071 struct elf_dyn_relocs **head;
6072
6073 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6074 p = *head;
6075 if (p == NULL || p->sec != sec)
6076 {
6077 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6078 if (p == NULL)
6079 return FALSE;
6080 p->next = *head;
6081 *head = p;
6082 p->sec = sec;
6083 p->count = 0;
6084 p->pc_count = 0;
6085 }
6086 p->count += 1;
6087 if (!must_be_dyn_reloc (info, r_type))
6088 p->pc_count += 1;
6089 }
6090 else
6091 {
6092 /* Track dynamic relocs needed for local syms too.
6093 We really need local syms available to do this
6094 easily. Oh well. */
6095 struct ppc_dyn_relocs *p;
6096 struct ppc_dyn_relocs **head;
6097 bfd_boolean is_ifunc;
6098 asection *s;
6099 void *vpp;
6100 Elf_Internal_Sym *isym;
6101
6102 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6103 abfd, r_symndx);
6104 if (isym == NULL)
6105 return FALSE;
6106
6107 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6108 if (s == NULL)
6109 s = sec;
6110
6111 vpp = &elf_section_data (s)->local_dynrel;
6112 head = (struct ppc_dyn_relocs **) vpp;
6113 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6114 p = *head;
6115 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6116 p = p->next;
6117 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6118 {
6119 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6120 if (p == NULL)
6121 return FALSE;
6122 p->next = *head;
6123 *head = p;
6124 p->sec = sec;
6125 p->ifunc = is_ifunc;
6126 p->count = 0;
6127 }
6128 p->count += 1;
6129 }
6130 }
6131 break;
6132
6133 default:
6134 break;
6135 }
6136 }
6137
6138 return TRUE;
6139 }
6140
6141 /* Merge backend specific data from an object file to the output
6142 object file when linking. */
6143
6144 static bfd_boolean
6145 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6146 {
6147 bfd *obfd = info->output_bfd;
6148 unsigned long iflags, oflags;
6149
6150 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6151 return TRUE;
6152
6153 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6154 return TRUE;
6155
6156 if (!_bfd_generic_verify_endian_match (ibfd, info))
6157 return FALSE;
6158
6159 iflags = elf_elfheader (ibfd)->e_flags;
6160 oflags = elf_elfheader (obfd)->e_flags;
6161
6162 if (iflags & ~EF_PPC64_ABI)
6163 {
6164 _bfd_error_handler
6165 /* xgettext:c-format */
6166 (_("%pB uses unknown e_flags 0x%lx"), ibfd, iflags);
6167 bfd_set_error (bfd_error_bad_value);
6168 return FALSE;
6169 }
6170 else if (iflags != oflags && iflags != 0)
6171 {
6172 _bfd_error_handler
6173 /* xgettext:c-format */
6174 (_("%pB: ABI version %ld is not compatible with ABI version %ld output"),
6175 ibfd, iflags, oflags);
6176 bfd_set_error (bfd_error_bad_value);
6177 return FALSE;
6178 }
6179
6180 if (!_bfd_elf_ppc_merge_fp_attributes (ibfd, info))
6181 return FALSE;
6182
6183 /* Merge Tag_compatibility attributes and any common GNU ones. */
6184 return _bfd_elf_merge_object_attributes (ibfd, info);
6185 }
6186
6187 static bfd_boolean
6188 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6189 {
6190 /* Print normal ELF private data. */
6191 _bfd_elf_print_private_bfd_data (abfd, ptr);
6192
6193 if (elf_elfheader (abfd)->e_flags != 0)
6194 {
6195 FILE *file = ptr;
6196
6197 fprintf (file, _("private flags = 0x%lx:"),
6198 elf_elfheader (abfd)->e_flags);
6199
6200 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6201 fprintf (file, _(" [abiv%ld]"),
6202 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6203 fputc ('\n', file);
6204 }
6205
6206 return TRUE;
6207 }
6208
6209 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6210 of the code entry point, and its section, which must be in the same
6211 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6212
6213 static bfd_vma
6214 opd_entry_value (asection *opd_sec,
6215 bfd_vma offset,
6216 asection **code_sec,
6217 bfd_vma *code_off,
6218 bfd_boolean in_code_sec)
6219 {
6220 bfd *opd_bfd = opd_sec->owner;
6221 Elf_Internal_Rela *relocs;
6222 Elf_Internal_Rela *lo, *hi, *look;
6223 bfd_vma val;
6224
6225 /* No relocs implies we are linking a --just-symbols object, or looking
6226 at a final linked executable with addr2line or somesuch. */
6227 if (opd_sec->reloc_count == 0)
6228 {
6229 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6230
6231 if (contents == NULL)
6232 {
6233 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6234 return (bfd_vma) -1;
6235 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6236 }
6237
6238 /* PR 17512: file: 64b9dfbb. */
6239 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6240 return (bfd_vma) -1;
6241
6242 val = bfd_get_64 (opd_bfd, contents + offset);
6243 if (code_sec != NULL)
6244 {
6245 asection *sec, *likely = NULL;
6246
6247 if (in_code_sec)
6248 {
6249 sec = *code_sec;
6250 if (sec->vma <= val
6251 && val < sec->vma + sec->size)
6252 likely = sec;
6253 else
6254 val = -1;
6255 }
6256 else
6257 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6258 if (sec->vma <= val
6259 && (sec->flags & SEC_LOAD) != 0
6260 && (sec->flags & SEC_ALLOC) != 0)
6261 likely = sec;
6262 if (likely != NULL)
6263 {
6264 *code_sec = likely;
6265 if (code_off != NULL)
6266 *code_off = val - likely->vma;
6267 }
6268 }
6269 return val;
6270 }
6271
6272 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6273
6274 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6275 if (relocs == NULL)
6276 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6277 /* PR 17512: file: df8e1fd6. */
6278 if (relocs == NULL)
6279 return (bfd_vma) -1;
6280
6281 /* Go find the opd reloc at the sym address. */
6282 lo = relocs;
6283 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6284 val = (bfd_vma) -1;
6285 while (lo < hi)
6286 {
6287 look = lo + (hi - lo) / 2;
6288 if (look->r_offset < offset)
6289 lo = look + 1;
6290 else if (look->r_offset > offset)
6291 hi = look;
6292 else
6293 {
6294 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6295
6296 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6297 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6298 {
6299 unsigned long symndx = ELF64_R_SYM (look->r_info);
6300 asection *sec = NULL;
6301
6302 if (symndx >= symtab_hdr->sh_info
6303 && elf_sym_hashes (opd_bfd) != NULL)
6304 {
6305 struct elf_link_hash_entry **sym_hashes;
6306 struct elf_link_hash_entry *rh;
6307
6308 sym_hashes = elf_sym_hashes (opd_bfd);
6309 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6310 if (rh != NULL)
6311 {
6312 rh = elf_follow_link (rh);
6313 if (rh->root.type != bfd_link_hash_defined
6314 && rh->root.type != bfd_link_hash_defweak)
6315 break;
6316 if (rh->root.u.def.section->owner == opd_bfd)
6317 {
6318 val = rh->root.u.def.value;
6319 sec = rh->root.u.def.section;
6320 }
6321 }
6322 }
6323
6324 if (sec == NULL)
6325 {
6326 Elf_Internal_Sym *sym;
6327
6328 if (symndx < symtab_hdr->sh_info)
6329 {
6330 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6331 if (sym == NULL)
6332 {
6333 size_t symcnt = symtab_hdr->sh_info;
6334 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6335 symcnt, 0,
6336 NULL, NULL, NULL);
6337 if (sym == NULL)
6338 break;
6339 symtab_hdr->contents = (bfd_byte *) sym;
6340 }
6341 sym += symndx;
6342 }
6343 else
6344 {
6345 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6346 1, symndx,
6347 NULL, NULL, NULL);
6348 if (sym == NULL)
6349 break;
6350 }
6351 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6352 if (sec == NULL)
6353 break;
6354 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6355 val = sym->st_value;
6356 }
6357
6358 val += look->r_addend;
6359 if (code_off != NULL)
6360 *code_off = val;
6361 if (code_sec != NULL)
6362 {
6363 if (in_code_sec && *code_sec != sec)
6364 return -1;
6365 else
6366 *code_sec = sec;
6367 }
6368 if (sec->output_section != NULL)
6369 val += sec->output_section->vma + sec->output_offset;
6370 }
6371 break;
6372 }
6373 }
6374
6375 return val;
6376 }
6377
6378 /* If the ELF symbol SYM might be a function in SEC, return the
6379 function size and set *CODE_OFF to the function's entry point,
6380 otherwise return zero. */
6381
6382 static bfd_size_type
6383 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6384 bfd_vma *code_off)
6385 {
6386 bfd_size_type size;
6387
6388 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6389 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6390 return 0;
6391
6392 size = 0;
6393 if (!(sym->flags & BSF_SYNTHETIC))
6394 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6395
6396 if (strcmp (sym->section->name, ".opd") == 0)
6397 {
6398 struct _opd_sec_data *opd = get_opd_info (sym->section);
6399 bfd_vma symval = sym->value;
6400
6401 if (opd != NULL
6402 && opd->adjust != NULL
6403 && elf_section_data (sym->section)->relocs != NULL)
6404 {
6405 /* opd_entry_value will use cached relocs that have been
6406 adjusted, but with raw symbols. That means both local
6407 and global symbols need adjusting. */
6408 long adjust = opd->adjust[OPD_NDX (symval)];
6409 if (adjust == -1)
6410 return 0;
6411 symval += adjust;
6412 }
6413
6414 if (opd_entry_value (sym->section, symval,
6415 &sec, code_off, TRUE) == (bfd_vma) -1)
6416 return 0;
6417 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6418 symbol. This size has nothing to do with the code size of the
6419 function, which is what we're supposed to return, but the
6420 code size isn't available without looking up the dot-sym.
6421 However, doing that would be a waste of time particularly
6422 since elf_find_function will look at the dot-sym anyway.
6423 Now, elf_find_function will keep the largest size of any
6424 function sym found at the code address of interest, so return
6425 1 here to avoid it incorrectly caching a larger function size
6426 for a small function. This does mean we return the wrong
6427 size for a new-ABI function of size 24, but all that does is
6428 disable caching for such functions. */
6429 if (size == 24)
6430 size = 1;
6431 }
6432 else
6433 {
6434 if (sym->section != sec)
6435 return 0;
6436 *code_off = sym->value;
6437 }
6438 if (size == 0)
6439 size = 1;
6440 return size;
6441 }
6442
6443 /* Return true if symbol is a strong function defined in an ELFv2
6444 object with st_other localentry bits of zero, ie. its local entry
6445 point coincides with its global entry point. */
6446
6447 static bfd_boolean
6448 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6449 {
6450 return (h != NULL
6451 && h->type == STT_FUNC
6452 && h->root.type == bfd_link_hash_defined
6453 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6454 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6455 && is_ppc64_elf (h->root.u.def.section->owner)
6456 && abiversion (h->root.u.def.section->owner) >= 2);
6457 }
6458
6459 /* Return true if symbol is defined in a regular object file. */
6460
6461 static bfd_boolean
6462 is_static_defined (struct elf_link_hash_entry *h)
6463 {
6464 return ((h->root.type == bfd_link_hash_defined
6465 || h->root.type == bfd_link_hash_defweak)
6466 && h->root.u.def.section != NULL
6467 && h->root.u.def.section->output_section != NULL);
6468 }
6469
6470 /* If FDH is a function descriptor symbol, return the associated code
6471 entry symbol if it is defined. Return NULL otherwise. */
6472
6473 static struct ppc_link_hash_entry *
6474 defined_code_entry (struct ppc_link_hash_entry *fdh)
6475 {
6476 if (fdh->is_func_descriptor)
6477 {
6478 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6479 if (fh->elf.root.type == bfd_link_hash_defined
6480 || fh->elf.root.type == bfd_link_hash_defweak)
6481 return fh;
6482 }
6483 return NULL;
6484 }
6485
6486 /* If FH is a function code entry symbol, return the associated
6487 function descriptor symbol if it is defined. Return NULL otherwise. */
6488
6489 static struct ppc_link_hash_entry *
6490 defined_func_desc (struct ppc_link_hash_entry *fh)
6491 {
6492 if (fh->oh != NULL
6493 && fh->oh->is_func_descriptor)
6494 {
6495 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6496 if (fdh->elf.root.type == bfd_link_hash_defined
6497 || fdh->elf.root.type == bfd_link_hash_defweak)
6498 return fdh;
6499 }
6500 return NULL;
6501 }
6502
6503 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6504
6505 /* Garbage collect sections, after first dealing with dot-symbols. */
6506
6507 static bfd_boolean
6508 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6509 {
6510 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6511
6512 if (htab != NULL && htab->need_func_desc_adj)
6513 {
6514 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6515 htab->need_func_desc_adj = 0;
6516 }
6517 return bfd_elf_gc_sections (abfd, info);
6518 }
6519
6520 /* Mark all our entry sym sections, both opd and code section. */
6521
6522 static void
6523 ppc64_elf_gc_keep (struct bfd_link_info *info)
6524 {
6525 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6526 struct bfd_sym_chain *sym;
6527
6528 if (htab == NULL)
6529 return;
6530
6531 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6532 {
6533 struct ppc_link_hash_entry *eh, *fh;
6534 asection *sec;
6535
6536 eh = (struct ppc_link_hash_entry *)
6537 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6538 if (eh == NULL)
6539 continue;
6540 if (eh->elf.root.type != bfd_link_hash_defined
6541 && eh->elf.root.type != bfd_link_hash_defweak)
6542 continue;
6543
6544 fh = defined_code_entry (eh);
6545 if (fh != NULL)
6546 {
6547 sec = fh->elf.root.u.def.section;
6548 sec->flags |= SEC_KEEP;
6549 }
6550 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6551 && opd_entry_value (eh->elf.root.u.def.section,
6552 eh->elf.root.u.def.value,
6553 &sec, NULL, FALSE) != (bfd_vma) -1)
6554 sec->flags |= SEC_KEEP;
6555
6556 sec = eh->elf.root.u.def.section;
6557 sec->flags |= SEC_KEEP;
6558 }
6559 }
6560
6561 /* Mark sections containing dynamically referenced symbols. When
6562 building shared libraries, we must assume that any visible symbol is
6563 referenced. */
6564
6565 static bfd_boolean
6566 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6567 {
6568 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6569 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6570 struct ppc_link_hash_entry *fdh;
6571 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6572
6573 /* Dynamic linking info is on the func descriptor sym. */
6574 fdh = defined_func_desc (eh);
6575 if (fdh != NULL)
6576 eh = fdh;
6577
6578 if ((eh->elf.root.type == bfd_link_hash_defined
6579 || eh->elf.root.type == bfd_link_hash_defweak)
6580 && ((eh->elf.ref_dynamic && !eh->elf.forced_local)
6581 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6582 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6583 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6584 && (!bfd_link_executable (info)
6585 || info->gc_keep_exported
6586 || info->export_dynamic
6587 || (eh->elf.dynamic
6588 && d != NULL
6589 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6590 && (eh->elf.versioned >= versioned
6591 || !bfd_hide_sym_by_version (info->version_info,
6592 eh->elf.root.root.string)))))
6593 {
6594 asection *code_sec;
6595 struct ppc_link_hash_entry *fh;
6596
6597 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6598
6599 /* Function descriptor syms cause the associated
6600 function code sym section to be marked. */
6601 fh = defined_code_entry (eh);
6602 if (fh != NULL)
6603 {
6604 code_sec = fh->elf.root.u.def.section;
6605 code_sec->flags |= SEC_KEEP;
6606 }
6607 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6608 && opd_entry_value (eh->elf.root.u.def.section,
6609 eh->elf.root.u.def.value,
6610 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6611 code_sec->flags |= SEC_KEEP;
6612 }
6613
6614 return TRUE;
6615 }
6616
6617 /* Return the section that should be marked against GC for a given
6618 relocation. */
6619
6620 static asection *
6621 ppc64_elf_gc_mark_hook (asection *sec,
6622 struct bfd_link_info *info,
6623 Elf_Internal_Rela *rel,
6624 struct elf_link_hash_entry *h,
6625 Elf_Internal_Sym *sym)
6626 {
6627 asection *rsec;
6628
6629 /* Syms return NULL if we're marking .opd, so we avoid marking all
6630 function sections, as all functions are referenced in .opd. */
6631 rsec = NULL;
6632 if (get_opd_info (sec) != NULL)
6633 return rsec;
6634
6635 if (h != NULL)
6636 {
6637 enum elf_ppc64_reloc_type r_type;
6638 struct ppc_link_hash_entry *eh, *fh, *fdh;
6639
6640 r_type = ELF64_R_TYPE (rel->r_info);
6641 switch (r_type)
6642 {
6643 case R_PPC64_GNU_VTINHERIT:
6644 case R_PPC64_GNU_VTENTRY:
6645 break;
6646
6647 default:
6648 switch (h->root.type)
6649 {
6650 case bfd_link_hash_defined:
6651 case bfd_link_hash_defweak:
6652 eh = (struct ppc_link_hash_entry *) h;
6653 fdh = defined_func_desc (eh);
6654 if (fdh != NULL)
6655 {
6656 /* -mcall-aixdesc code references the dot-symbol on
6657 a call reloc. Mark the function descriptor too
6658 against garbage collection. */
6659 fdh->elf.mark = 1;
6660 if (fdh->elf.is_weakalias)
6661 weakdef (&fdh->elf)->mark = 1;
6662 eh = fdh;
6663 }
6664
6665 /* Function descriptor syms cause the associated
6666 function code sym section to be marked. */
6667 fh = defined_code_entry (eh);
6668 if (fh != NULL)
6669 {
6670 /* They also mark their opd section. */
6671 eh->elf.root.u.def.section->gc_mark = 1;
6672
6673 rsec = fh->elf.root.u.def.section;
6674 }
6675 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6676 && opd_entry_value (eh->elf.root.u.def.section,
6677 eh->elf.root.u.def.value,
6678 &rsec, NULL, FALSE) != (bfd_vma) -1)
6679 eh->elf.root.u.def.section->gc_mark = 1;
6680 else
6681 rsec = h->root.u.def.section;
6682 break;
6683
6684 case bfd_link_hash_common:
6685 rsec = h->root.u.c.p->section;
6686 break;
6687
6688 default:
6689 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6690 }
6691 }
6692 }
6693 else
6694 {
6695 struct _opd_sec_data *opd;
6696
6697 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6698 opd = get_opd_info (rsec);
6699 if (opd != NULL && opd->func_sec != NULL)
6700 {
6701 rsec->gc_mark = 1;
6702
6703 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6704 }
6705 }
6706
6707 return rsec;
6708 }
6709
6710 /* The maximum size of .sfpr. */
6711 #define SFPR_MAX (218*4)
6712
6713 struct sfpr_def_parms
6714 {
6715 const char name[12];
6716 unsigned char lo, hi;
6717 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6718 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6719 };
6720
6721 /* Auto-generate _save*, _rest* functions in .sfpr.
6722 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6723 instead. */
6724
6725 static bfd_boolean
6726 sfpr_define (struct bfd_link_info *info,
6727 const struct sfpr_def_parms *parm,
6728 asection *stub_sec)
6729 {
6730 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6731 unsigned int i;
6732 size_t len = strlen (parm->name);
6733 bfd_boolean writing = FALSE;
6734 char sym[16];
6735
6736 if (htab == NULL)
6737 return FALSE;
6738
6739 memcpy (sym, parm->name, len);
6740 sym[len + 2] = 0;
6741
6742 for (i = parm->lo; i <= parm->hi; i++)
6743 {
6744 struct ppc_link_hash_entry *h;
6745
6746 sym[len + 0] = i / 10 + '0';
6747 sym[len + 1] = i % 10 + '0';
6748 h = (struct ppc_link_hash_entry *)
6749 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6750 if (stub_sec != NULL)
6751 {
6752 if (h != NULL
6753 && h->elf.root.type == bfd_link_hash_defined
6754 && h->elf.root.u.def.section == htab->sfpr)
6755 {
6756 struct elf_link_hash_entry *s;
6757 char buf[32];
6758 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6759 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6760 if (s == NULL)
6761 return FALSE;
6762 if (s->root.type == bfd_link_hash_new
6763 || (s->root.type = bfd_link_hash_defined
6764 && s->root.u.def.section == stub_sec))
6765 {
6766 s->root.type = bfd_link_hash_defined;
6767 s->root.u.def.section = stub_sec;
6768 s->root.u.def.value = (stub_sec->size - htab->sfpr->size
6769 + h->elf.root.u.def.value);
6770 s->ref_regular = 1;
6771 s->def_regular = 1;
6772 s->ref_regular_nonweak = 1;
6773 s->forced_local = 1;
6774 s->non_elf = 0;
6775 s->root.linker_def = 1;
6776 }
6777 }
6778 continue;
6779 }
6780 if (h != NULL)
6781 {
6782 h->save_res = 1;
6783 if (!h->elf.def_regular)
6784 {
6785 h->elf.root.type = bfd_link_hash_defined;
6786 h->elf.root.u.def.section = htab->sfpr;
6787 h->elf.root.u.def.value = htab->sfpr->size;
6788 h->elf.type = STT_FUNC;
6789 h->elf.def_regular = 1;
6790 h->elf.non_elf = 0;
6791 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6792 writing = TRUE;
6793 if (htab->sfpr->contents == NULL)
6794 {
6795 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6796 if (htab->sfpr->contents == NULL)
6797 return FALSE;
6798 }
6799 }
6800 }
6801 if (writing)
6802 {
6803 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6804 if (i != parm->hi)
6805 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6806 else
6807 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6808 htab->sfpr->size = p - htab->sfpr->contents;
6809 }
6810 }
6811
6812 return TRUE;
6813 }
6814
6815 static bfd_byte *
6816 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6817 {
6818 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6819 return p + 4;
6820 }
6821
6822 static bfd_byte *
6823 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6824 {
6825 p = savegpr0 (abfd, p, r);
6826 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6827 p = p + 4;
6828 bfd_put_32 (abfd, BLR, p);
6829 return p + 4;
6830 }
6831
6832 static bfd_byte *
6833 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6834 {
6835 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6836 return p + 4;
6837 }
6838
6839 static bfd_byte *
6840 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6841 {
6842 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6843 p = p + 4;
6844 p = restgpr0 (abfd, p, r);
6845 bfd_put_32 (abfd, MTLR_R0, p);
6846 p = p + 4;
6847 if (r == 29)
6848 {
6849 p = restgpr0 (abfd, p, 30);
6850 p = restgpr0 (abfd, p, 31);
6851 }
6852 bfd_put_32 (abfd, BLR, p);
6853 return p + 4;
6854 }
6855
6856 static bfd_byte *
6857 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6858 {
6859 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6860 return p + 4;
6861 }
6862
6863 static bfd_byte *
6864 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6865 {
6866 p = savegpr1 (abfd, p, r);
6867 bfd_put_32 (abfd, BLR, p);
6868 return p + 4;
6869 }
6870
6871 static bfd_byte *
6872 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6873 {
6874 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6875 return p + 4;
6876 }
6877
6878 static bfd_byte *
6879 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6880 {
6881 p = restgpr1 (abfd, p, r);
6882 bfd_put_32 (abfd, BLR, p);
6883 return p + 4;
6884 }
6885
6886 static bfd_byte *
6887 savefpr (bfd *abfd, bfd_byte *p, int r)
6888 {
6889 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6890 return p + 4;
6891 }
6892
6893 static bfd_byte *
6894 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6895 {
6896 p = savefpr (abfd, p, r);
6897 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6898 p = p + 4;
6899 bfd_put_32 (abfd, BLR, p);
6900 return p + 4;
6901 }
6902
6903 static bfd_byte *
6904 restfpr (bfd *abfd, bfd_byte *p, int r)
6905 {
6906 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6907 return p + 4;
6908 }
6909
6910 static bfd_byte *
6911 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6912 {
6913 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6914 p = p + 4;
6915 p = restfpr (abfd, p, r);
6916 bfd_put_32 (abfd, MTLR_R0, p);
6917 p = p + 4;
6918 if (r == 29)
6919 {
6920 p = restfpr (abfd, p, 30);
6921 p = restfpr (abfd, p, 31);
6922 }
6923 bfd_put_32 (abfd, BLR, p);
6924 return p + 4;
6925 }
6926
6927 static bfd_byte *
6928 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6929 {
6930 p = savefpr (abfd, p, r);
6931 bfd_put_32 (abfd, BLR, p);
6932 return p + 4;
6933 }
6934
6935 static bfd_byte *
6936 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6937 {
6938 p = restfpr (abfd, p, r);
6939 bfd_put_32 (abfd, BLR, p);
6940 return p + 4;
6941 }
6942
6943 static bfd_byte *
6944 savevr (bfd *abfd, bfd_byte *p, int r)
6945 {
6946 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6947 p = p + 4;
6948 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6949 return p + 4;
6950 }
6951
6952 static bfd_byte *
6953 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6954 {
6955 p = savevr (abfd, p, r);
6956 bfd_put_32 (abfd, BLR, p);
6957 return p + 4;
6958 }
6959
6960 static bfd_byte *
6961 restvr (bfd *abfd, bfd_byte *p, int r)
6962 {
6963 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6964 p = p + 4;
6965 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6966 return p + 4;
6967 }
6968
6969 static bfd_byte *
6970 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6971 {
6972 p = restvr (abfd, p, r);
6973 bfd_put_32 (abfd, BLR, p);
6974 return p + 4;
6975 }
6976
6977 /* Called via elf_link_hash_traverse to transfer dynamic linking
6978 information on function code symbol entries to their corresponding
6979 function descriptor symbol entries. */
6980
6981 static bfd_boolean
6982 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6983 {
6984 struct bfd_link_info *info;
6985 struct ppc_link_hash_table *htab;
6986 struct ppc_link_hash_entry *fh;
6987 struct ppc_link_hash_entry *fdh;
6988 bfd_boolean force_local;
6989
6990 fh = (struct ppc_link_hash_entry *) h;
6991 if (fh->elf.root.type == bfd_link_hash_indirect)
6992 return TRUE;
6993
6994 if (!fh->is_func)
6995 return TRUE;
6996
6997 if (fh->elf.root.root.string[0] != '.'
6998 || fh->elf.root.root.string[1] == '\0')
6999 return TRUE;
7000
7001 info = inf;
7002 htab = ppc_hash_table (info);
7003 if (htab == NULL)
7004 return FALSE;
7005
7006 /* Find the corresponding function descriptor symbol. */
7007 fdh = lookup_fdh (fh, htab);
7008
7009 /* Resolve undefined references to dot-symbols as the value
7010 in the function descriptor, if we have one in a regular object.
7011 This is to satisfy cases like ".quad .foo". Calls to functions
7012 in dynamic objects are handled elsewhere. */
7013 if ((fh->elf.root.type == bfd_link_hash_undefined
7014 || fh->elf.root.type == bfd_link_hash_undefweak)
7015 && (fdh->elf.root.type == bfd_link_hash_defined
7016 || fdh->elf.root.type == bfd_link_hash_defweak)
7017 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7018 && opd_entry_value (fdh->elf.root.u.def.section,
7019 fdh->elf.root.u.def.value,
7020 &fh->elf.root.u.def.section,
7021 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7022 {
7023 fh->elf.root.type = fdh->elf.root.type;
7024 fh->elf.forced_local = 1;
7025 fh->elf.def_regular = fdh->elf.def_regular;
7026 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7027 }
7028
7029 if (!fh->elf.dynamic)
7030 {
7031 struct plt_entry *ent;
7032
7033 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7034 if (ent->plt.refcount > 0)
7035 break;
7036 if (ent == NULL)
7037 return TRUE;
7038 }
7039
7040 /* Create a descriptor as undefined if necessary. */
7041 if (fdh == NULL
7042 && !bfd_link_executable (info)
7043 && (fh->elf.root.type == bfd_link_hash_undefined
7044 || fh->elf.root.type == bfd_link_hash_undefweak))
7045 {
7046 fdh = make_fdh (info, fh);
7047 if (fdh == NULL)
7048 return FALSE;
7049 }
7050
7051 /* We can't support overriding of symbols on a fake descriptor. */
7052 if (fdh != NULL
7053 && fdh->fake
7054 && (fh->elf.root.type == bfd_link_hash_defined
7055 || fh->elf.root.type == bfd_link_hash_defweak))
7056 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7057
7058 /* Transfer dynamic linking information to the function descriptor. */
7059 if (fdh != NULL)
7060 {
7061 fdh->elf.ref_regular |= fh->elf.ref_regular;
7062 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7063 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7064 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7065 fdh->elf.dynamic |= fh->elf.dynamic;
7066 fdh->elf.needs_plt |= (fh->elf.needs_plt
7067 || fh->elf.type == STT_FUNC
7068 || fh->elf.type == STT_GNU_IFUNC);
7069 move_plt_plist (fh, fdh);
7070
7071 if (!fdh->elf.forced_local
7072 && fh->elf.dynindx != -1)
7073 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7074 return FALSE;
7075 }
7076
7077 /* Now that the info is on the function descriptor, clear the
7078 function code sym info. Any function code syms for which we
7079 don't have a definition in a regular file, we force local.
7080 This prevents a shared library from exporting syms that have
7081 been imported from another library. Function code syms that
7082 are really in the library we must leave global to prevent the
7083 linker dragging in a definition from a static library. */
7084 force_local = (!fh->elf.def_regular
7085 || fdh == NULL
7086 || !fdh->elf.def_regular
7087 || fdh->elf.forced_local);
7088 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7089
7090 return TRUE;
7091 }
7092
7093 static const struct sfpr_def_parms save_res_funcs[] =
7094 {
7095 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7096 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7097 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7098 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7099 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7100 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7101 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7102 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7103 { "._savef", 14, 31, savefpr, savefpr1_tail },
7104 { "._restf", 14, 31, restfpr, restfpr1_tail },
7105 { "_savevr_", 20, 31, savevr, savevr_tail },
7106 { "_restvr_", 20, 31, restvr, restvr_tail }
7107 };
7108
7109 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7110 this hook to a) provide some gcc support functions, and b) transfer
7111 dynamic linking information gathered so far on function code symbol
7112 entries, to their corresponding function descriptor symbol entries. */
7113
7114 static bfd_boolean
7115 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7116 struct bfd_link_info *info)
7117 {
7118 struct ppc_link_hash_table *htab;
7119
7120 htab = ppc_hash_table (info);
7121 if (htab == NULL)
7122 return FALSE;
7123
7124 /* Provide any missing _save* and _rest* functions. */
7125 if (htab->sfpr != NULL)
7126 {
7127 unsigned int i;
7128
7129 htab->sfpr->size = 0;
7130 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7131 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7132 return FALSE;
7133 if (htab->sfpr->size == 0)
7134 htab->sfpr->flags |= SEC_EXCLUDE;
7135 }
7136
7137 if (bfd_link_relocatable (info))
7138 return TRUE;
7139
7140 if (htab->elf.hgot != NULL)
7141 {
7142 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7143 /* Make .TOC. defined so as to prevent it being made dynamic.
7144 The wrong value here is fixed later in ppc64_elf_set_toc. */
7145 if (!htab->elf.hgot->def_regular
7146 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7147 {
7148 htab->elf.hgot->root.type = bfd_link_hash_defined;
7149 htab->elf.hgot->root.u.def.value = 0;
7150 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7151 htab->elf.hgot->def_regular = 1;
7152 htab->elf.hgot->root.linker_def = 1;
7153 }
7154 htab->elf.hgot->type = STT_OBJECT;
7155 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7156 | STV_HIDDEN);
7157 }
7158
7159 if (htab->need_func_desc_adj)
7160 {
7161 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7162 htab->need_func_desc_adj = 0;
7163 }
7164
7165 return TRUE;
7166 }
7167
7168 /* Find dynamic relocs for H that apply to read-only sections. */
7169
7170 static asection *
7171 readonly_dynrelocs (struct elf_link_hash_entry *h)
7172 {
7173 struct ppc_link_hash_entry *eh;
7174 struct elf_dyn_relocs *p;
7175
7176 eh = (struct ppc_link_hash_entry *) h;
7177 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7178 {
7179 asection *s = p->sec->output_section;
7180
7181 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7182 return p->sec;
7183 }
7184 return NULL;
7185 }
7186
7187 /* Return true if we have dynamic relocs against H or any of its weak
7188 aliases, that apply to read-only sections. Cannot be used after
7189 size_dynamic_sections. */
7190
7191 static bfd_boolean
7192 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7193 {
7194 struct ppc_link_hash_entry *eh;
7195
7196 eh = (struct ppc_link_hash_entry *) h;
7197 do
7198 {
7199 if (readonly_dynrelocs (&eh->elf))
7200 return TRUE;
7201 eh = (struct ppc_link_hash_entry *) eh->elf.u.alias;
7202 } while (eh != NULL && &eh->elf != h);
7203
7204 return FALSE;
7205 }
7206
7207 /* Return whether EH has pc-relative dynamic relocs. */
7208
7209 static bfd_boolean
7210 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7211 {
7212 struct elf_dyn_relocs *p;
7213
7214 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7215 if (p->pc_count != 0)
7216 return TRUE;
7217 return FALSE;
7218 }
7219
7220 /* Return true if a global entry stub will be created for H. Valid
7221 for ELFv2 before plt entries have been allocated. */
7222
7223 static bfd_boolean
7224 global_entry_stub (struct elf_link_hash_entry *h)
7225 {
7226 struct plt_entry *pent;
7227
7228 if (!h->pointer_equality_needed
7229 || h->def_regular)
7230 return FALSE;
7231
7232 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7233 if (pent->plt.refcount > 0
7234 && pent->addend == 0)
7235 return TRUE;
7236
7237 return FALSE;
7238 }
7239
7240 /* Adjust a symbol defined by a dynamic object and referenced by a
7241 regular object. The current definition is in some section of the
7242 dynamic object, but we're not including those sections. We have to
7243 change the definition to something the rest of the link can
7244 understand. */
7245
7246 static bfd_boolean
7247 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7248 struct elf_link_hash_entry *h)
7249 {
7250 struct ppc_link_hash_table *htab;
7251 asection *s, *srel;
7252
7253 htab = ppc_hash_table (info);
7254 if (htab == NULL)
7255 return FALSE;
7256
7257 /* Deal with function syms. */
7258 if (h->type == STT_FUNC
7259 || h->type == STT_GNU_IFUNC
7260 || h->needs_plt)
7261 {
7262 bfd_boolean local = (((struct ppc_link_hash_entry *) h)->save_res
7263 || SYMBOL_CALLS_LOCAL (info, h)
7264 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
7265 /* Discard dyn_relocs when non-pic if we've decided that a
7266 function symbol is local and not an ifunc. We keep dynamic
7267 relocs for ifuncs when local rather than always emitting a
7268 plt call stub for them and defining the symbol on the call
7269 stub. We can't do that for ELFv1 anyway (a function symbol
7270 is defined on a descriptor, not code) and it can be faster at
7271 run-time due to not needing to bounce through a stub. The
7272 dyn_relocs for ifuncs will be applied even in a static
7273 executable. */
7274 if (!bfd_link_pic (info)
7275 && h->type != STT_GNU_IFUNC
7276 && local)
7277 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7278
7279 /* Clear procedure linkage table information for any symbol that
7280 won't need a .plt entry. */
7281 struct plt_entry *ent;
7282 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7283 if (ent->plt.refcount > 0)
7284 break;
7285 if (ent == NULL
7286 || (h->type != STT_GNU_IFUNC
7287 && local
7288 && (htab->can_convert_all_inline_plt
7289 || (((struct ppc_link_hash_entry *) h)->tls_mask
7290 & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)))
7291 {
7292 h->plt.plist = NULL;
7293 h->needs_plt = 0;
7294 h->pointer_equality_needed = 0;
7295 }
7296 else if (abiversion (info->output_bfd) >= 2)
7297 {
7298 /* Taking a function's address in a read/write section
7299 doesn't require us to define the function symbol in the
7300 executable on a global entry stub. A dynamic reloc can
7301 be used instead. The reason we prefer a few more dynamic
7302 relocs is that calling via a global entry stub costs a
7303 few more instructions, and pointer_equality_needed causes
7304 extra work in ld.so when resolving these symbols. */
7305 if (global_entry_stub (h))
7306 {
7307 if (!readonly_dynrelocs (h))
7308 {
7309 h->pointer_equality_needed = 0;
7310 /* If we haven't seen a branch reloc and the symbol
7311 isn't an ifunc then we don't need a plt entry. */
7312 if (!h->needs_plt)
7313 h->plt.plist = NULL;
7314 }
7315 else if (!bfd_link_pic (info))
7316 /* We are going to be defining the function symbol on the
7317 plt stub, so no dyn_relocs needed when non-pic. */
7318 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7319 }
7320
7321 /* ELFv2 function symbols can't have copy relocs. */
7322 return TRUE;
7323 }
7324 else if (!h->needs_plt
7325 && !readonly_dynrelocs (h))
7326 {
7327 /* If we haven't seen a branch reloc and the symbol isn't an
7328 ifunc then we don't need a plt entry. */
7329 h->plt.plist = NULL;
7330 h->pointer_equality_needed = 0;
7331 return TRUE;
7332 }
7333 }
7334 else
7335 h->plt.plist = NULL;
7336
7337 /* If this is a weak symbol, and there is a real definition, the
7338 processor independent code will have arranged for us to see the
7339 real definition first, and we can just use the same value. */
7340 if (h->is_weakalias)
7341 {
7342 struct elf_link_hash_entry *def = weakdef (h);
7343 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
7344 h->root.u.def.section = def->root.u.def.section;
7345 h->root.u.def.value = def->root.u.def.value;
7346 if (def->root.u.def.section == htab->elf.sdynbss
7347 || def->root.u.def.section == htab->elf.sdynrelro)
7348 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7349 return TRUE;
7350 }
7351
7352 /* If we are creating a shared library, we must presume that the
7353 only references to the symbol are via the global offset table.
7354 For such cases we need not do anything here; the relocations will
7355 be handled correctly by relocate_section. */
7356 if (bfd_link_pic (info))
7357 return TRUE;
7358
7359 /* If there are no references to this symbol that do not use the
7360 GOT, we don't need to generate a copy reloc. */
7361 if (!h->non_got_ref)
7362 return TRUE;
7363
7364 /* Don't generate a copy reloc for symbols defined in the executable. */
7365 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7366
7367 /* If -z nocopyreloc was given, don't generate them either. */
7368 || info->nocopyreloc
7369
7370 /* If we don't find any dynamic relocs in read-only sections, then
7371 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7372 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7373
7374 /* Protected variables do not work with .dynbss. The copy in
7375 .dynbss won't be used by the shared library with the protected
7376 definition for the variable. Text relocations are preferable
7377 to an incorrect program. */
7378 || h->protected_def)
7379 return TRUE;
7380
7381 if (h->plt.plist != NULL)
7382 {
7383 /* We should never get here, but unfortunately there are versions
7384 of gcc out there that improperly (for this ABI) put initialized
7385 function pointers, vtable refs and suchlike in read-only
7386 sections. Allow them to proceed, but warn that this might
7387 break at runtime. */
7388 info->callbacks->einfo
7389 (_("%P: copy reloc against `%pT' requires lazy plt linking; "
7390 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7391 h->root.root.string);
7392 }
7393
7394 /* This is a reference to a symbol defined by a dynamic object which
7395 is not a function. */
7396
7397 /* We must allocate the symbol in our .dynbss section, which will
7398 become part of the .bss section of the executable. There will be
7399 an entry for this symbol in the .dynsym section. The dynamic
7400 object will contain position independent code, so all references
7401 from the dynamic object to this symbol will go through the global
7402 offset table. The dynamic linker will use the .dynsym entry to
7403 determine the address it must put in the global offset table, so
7404 both the dynamic object and the regular object will refer to the
7405 same memory location for the variable. */
7406 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7407 {
7408 s = htab->elf.sdynrelro;
7409 srel = htab->elf.sreldynrelro;
7410 }
7411 else
7412 {
7413 s = htab->elf.sdynbss;
7414 srel = htab->elf.srelbss;
7415 }
7416 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7417 {
7418 /* We must generate a R_PPC64_COPY reloc to tell the dynamic
7419 linker to copy the initial value out of the dynamic object
7420 and into the runtime process image. */
7421 srel->size += sizeof (Elf64_External_Rela);
7422 h->needs_copy = 1;
7423 }
7424
7425 /* We no longer want dyn_relocs. */
7426 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7427 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7428 }
7429
7430 /* If given a function descriptor symbol, hide both the function code
7431 sym and the descriptor. */
7432 static void
7433 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7434 struct elf_link_hash_entry *h,
7435 bfd_boolean force_local)
7436 {
7437 struct ppc_link_hash_entry *eh;
7438 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7439
7440 eh = (struct ppc_link_hash_entry *) h;
7441 if (eh->is_func_descriptor)
7442 {
7443 struct ppc_link_hash_entry *fh = eh->oh;
7444
7445 if (fh == NULL)
7446 {
7447 const char *p, *q;
7448 struct elf_link_hash_table *htab = elf_hash_table (info);
7449 char save;
7450
7451 /* We aren't supposed to use alloca in BFD because on
7452 systems which do not have alloca the version in libiberty
7453 calls xmalloc, which might cause the program to crash
7454 when it runs out of memory. This function doesn't have a
7455 return status, so there's no way to gracefully return an
7456 error. So cheat. We know that string[-1] can be safely
7457 accessed; It's either a string in an ELF string table,
7458 or allocated in an objalloc structure. */
7459
7460 p = eh->elf.root.root.string - 1;
7461 save = *p;
7462 *(char *) p = '.';
7463 fh = (struct ppc_link_hash_entry *)
7464 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7465 *(char *) p = save;
7466
7467 /* Unfortunately, if it so happens that the string we were
7468 looking for was allocated immediately before this string,
7469 then we overwrote the string terminator. That's the only
7470 reason the lookup should fail. */
7471 if (fh == NULL)
7472 {
7473 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7474 while (q >= eh->elf.root.root.string && *q == *p)
7475 --q, --p;
7476 if (q < eh->elf.root.root.string && *p == '.')
7477 fh = (struct ppc_link_hash_entry *)
7478 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7479 }
7480 if (fh != NULL)
7481 {
7482 eh->oh = fh;
7483 fh->oh = eh;
7484 }
7485 }
7486 if (fh != NULL)
7487 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7488 }
7489 }
7490
7491 static bfd_boolean
7492 get_sym_h (struct elf_link_hash_entry **hp,
7493 Elf_Internal_Sym **symp,
7494 asection **symsecp,
7495 unsigned char **tls_maskp,
7496 Elf_Internal_Sym **locsymsp,
7497 unsigned long r_symndx,
7498 bfd *ibfd)
7499 {
7500 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7501
7502 if (r_symndx >= symtab_hdr->sh_info)
7503 {
7504 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7505 struct elf_link_hash_entry *h;
7506
7507 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7508 h = elf_follow_link (h);
7509
7510 if (hp != NULL)
7511 *hp = h;
7512
7513 if (symp != NULL)
7514 *symp = NULL;
7515
7516 if (symsecp != NULL)
7517 {
7518 asection *symsec = NULL;
7519 if (h->root.type == bfd_link_hash_defined
7520 || h->root.type == bfd_link_hash_defweak)
7521 symsec = h->root.u.def.section;
7522 *symsecp = symsec;
7523 }
7524
7525 if (tls_maskp != NULL)
7526 {
7527 struct ppc_link_hash_entry *eh;
7528
7529 eh = (struct ppc_link_hash_entry *) h;
7530 *tls_maskp = &eh->tls_mask;
7531 }
7532 }
7533 else
7534 {
7535 Elf_Internal_Sym *sym;
7536 Elf_Internal_Sym *locsyms = *locsymsp;
7537
7538 if (locsyms == NULL)
7539 {
7540 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7541 if (locsyms == NULL)
7542 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7543 symtab_hdr->sh_info,
7544 0, NULL, NULL, NULL);
7545 if (locsyms == NULL)
7546 return FALSE;
7547 *locsymsp = locsyms;
7548 }
7549 sym = locsyms + r_symndx;
7550
7551 if (hp != NULL)
7552 *hp = NULL;
7553
7554 if (symp != NULL)
7555 *symp = sym;
7556
7557 if (symsecp != NULL)
7558 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7559
7560 if (tls_maskp != NULL)
7561 {
7562 struct got_entry **lgot_ents;
7563 unsigned char *tls_mask;
7564
7565 tls_mask = NULL;
7566 lgot_ents = elf_local_got_ents (ibfd);
7567 if (lgot_ents != NULL)
7568 {
7569 struct plt_entry **local_plt = (struct plt_entry **)
7570 (lgot_ents + symtab_hdr->sh_info);
7571 unsigned char *lgot_masks = (unsigned char *)
7572 (local_plt + symtab_hdr->sh_info);
7573 tls_mask = &lgot_masks[r_symndx];
7574 }
7575 *tls_maskp = tls_mask;
7576 }
7577 }
7578 return TRUE;
7579 }
7580
7581 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7582 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7583 type suitable for optimization, and 1 otherwise. */
7584
7585 static int
7586 get_tls_mask (unsigned char **tls_maskp,
7587 unsigned long *toc_symndx,
7588 bfd_vma *toc_addend,
7589 Elf_Internal_Sym **locsymsp,
7590 const Elf_Internal_Rela *rel,
7591 bfd *ibfd)
7592 {
7593 unsigned long r_symndx;
7594 int next_r;
7595 struct elf_link_hash_entry *h;
7596 Elf_Internal_Sym *sym;
7597 asection *sec;
7598 bfd_vma off;
7599
7600 r_symndx = ELF64_R_SYM (rel->r_info);
7601 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7602 return 0;
7603
7604 if ((*tls_maskp != NULL
7605 && (**tls_maskp & TLS_TLS) != 0
7606 && **tls_maskp != (TLS_TLS | TLS_MARK))
7607 || sec == NULL
7608 || ppc64_elf_section_data (sec) == NULL
7609 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7610 return 1;
7611
7612 /* Look inside a TOC section too. */
7613 if (h != NULL)
7614 {
7615 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7616 off = h->root.u.def.value;
7617 }
7618 else
7619 off = sym->st_value;
7620 off += rel->r_addend;
7621 BFD_ASSERT (off % 8 == 0);
7622 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7623 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7624 if (toc_symndx != NULL)
7625 *toc_symndx = r_symndx;
7626 if (toc_addend != NULL)
7627 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7628 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7629 return 0;
7630 if ((h == NULL || is_static_defined (h))
7631 && (next_r == -1 || next_r == -2))
7632 return 1 - next_r;
7633 return 1;
7634 }
7635
7636 /* Find (or create) an entry in the tocsave hash table. */
7637
7638 static struct tocsave_entry *
7639 tocsave_find (struct ppc_link_hash_table *htab,
7640 enum insert_option insert,
7641 Elf_Internal_Sym **local_syms,
7642 const Elf_Internal_Rela *irela,
7643 bfd *ibfd)
7644 {
7645 unsigned long r_indx;
7646 struct elf_link_hash_entry *h;
7647 Elf_Internal_Sym *sym;
7648 struct tocsave_entry ent, *p;
7649 hashval_t hash;
7650 struct tocsave_entry **slot;
7651
7652 r_indx = ELF64_R_SYM (irela->r_info);
7653 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7654 return NULL;
7655 if (ent.sec == NULL || ent.sec->output_section == NULL)
7656 {
7657 _bfd_error_handler
7658 (_("%pB: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7659 return NULL;
7660 }
7661
7662 if (h != NULL)
7663 ent.offset = h->root.u.def.value;
7664 else
7665 ent.offset = sym->st_value;
7666 ent.offset += irela->r_addend;
7667
7668 hash = tocsave_htab_hash (&ent);
7669 slot = ((struct tocsave_entry **)
7670 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7671 if (slot == NULL)
7672 return NULL;
7673
7674 if (*slot == NULL)
7675 {
7676 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7677 if (p == NULL)
7678 return NULL;
7679 *p = ent;
7680 *slot = p;
7681 }
7682 return *slot;
7683 }
7684
7685 /* Adjust all global syms defined in opd sections. In gcc generated
7686 code for the old ABI, these will already have been done. */
7687
7688 static bfd_boolean
7689 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7690 {
7691 struct ppc_link_hash_entry *eh;
7692 asection *sym_sec;
7693 struct _opd_sec_data *opd;
7694
7695 if (h->root.type == bfd_link_hash_indirect)
7696 return TRUE;
7697
7698 if (h->root.type != bfd_link_hash_defined
7699 && h->root.type != bfd_link_hash_defweak)
7700 return TRUE;
7701
7702 eh = (struct ppc_link_hash_entry *) h;
7703 if (eh->adjust_done)
7704 return TRUE;
7705
7706 sym_sec = eh->elf.root.u.def.section;
7707 opd = get_opd_info (sym_sec);
7708 if (opd != NULL && opd->adjust != NULL)
7709 {
7710 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7711 if (adjust == -1)
7712 {
7713 /* This entry has been deleted. */
7714 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7715 if (dsec == NULL)
7716 {
7717 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7718 if (discarded_section (dsec))
7719 {
7720 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7721 break;
7722 }
7723 }
7724 eh->elf.root.u.def.value = 0;
7725 eh->elf.root.u.def.section = dsec;
7726 }
7727 else
7728 eh->elf.root.u.def.value += adjust;
7729 eh->adjust_done = 1;
7730 }
7731 return TRUE;
7732 }
7733
7734 /* Handles decrementing dynamic reloc counts for the reloc specified by
7735 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7736 have already been determined. */
7737
7738 static bfd_boolean
7739 dec_dynrel_count (bfd_vma r_info,
7740 asection *sec,
7741 struct bfd_link_info *info,
7742 Elf_Internal_Sym **local_syms,
7743 struct elf_link_hash_entry *h,
7744 Elf_Internal_Sym *sym)
7745 {
7746 enum elf_ppc64_reloc_type r_type;
7747 asection *sym_sec = NULL;
7748
7749 /* Can this reloc be dynamic? This switch, and later tests here
7750 should be kept in sync with the code in check_relocs. */
7751 r_type = ELF64_R_TYPE (r_info);
7752 switch (r_type)
7753 {
7754 default:
7755 return TRUE;
7756
7757 case R_PPC64_TPREL16:
7758 case R_PPC64_TPREL16_LO:
7759 case R_PPC64_TPREL16_HI:
7760 case R_PPC64_TPREL16_HA:
7761 case R_PPC64_TPREL16_DS:
7762 case R_PPC64_TPREL16_LO_DS:
7763 case R_PPC64_TPREL16_HIGH:
7764 case R_PPC64_TPREL16_HIGHA:
7765 case R_PPC64_TPREL16_HIGHER:
7766 case R_PPC64_TPREL16_HIGHERA:
7767 case R_PPC64_TPREL16_HIGHEST:
7768 case R_PPC64_TPREL16_HIGHESTA:
7769 case R_PPC64_TPREL64:
7770 case R_PPC64_DTPMOD64:
7771 case R_PPC64_DTPREL64:
7772 case R_PPC64_ADDR64:
7773 case R_PPC64_REL30:
7774 case R_PPC64_REL32:
7775 case R_PPC64_REL64:
7776 case R_PPC64_ADDR14:
7777 case R_PPC64_ADDR14_BRNTAKEN:
7778 case R_PPC64_ADDR14_BRTAKEN:
7779 case R_PPC64_ADDR16:
7780 case R_PPC64_ADDR16_DS:
7781 case R_PPC64_ADDR16_HA:
7782 case R_PPC64_ADDR16_HI:
7783 case R_PPC64_ADDR16_HIGH:
7784 case R_PPC64_ADDR16_HIGHA:
7785 case R_PPC64_ADDR16_HIGHER:
7786 case R_PPC64_ADDR16_HIGHERA:
7787 case R_PPC64_ADDR16_HIGHEST:
7788 case R_PPC64_ADDR16_HIGHESTA:
7789 case R_PPC64_ADDR16_LO:
7790 case R_PPC64_ADDR16_LO_DS:
7791 case R_PPC64_ADDR24:
7792 case R_PPC64_ADDR32:
7793 case R_PPC64_UADDR16:
7794 case R_PPC64_UADDR32:
7795 case R_PPC64_UADDR64:
7796 case R_PPC64_TOC:
7797 break;
7798 }
7799
7800 if (local_syms != NULL)
7801 {
7802 unsigned long r_symndx;
7803 bfd *ibfd = sec->owner;
7804
7805 r_symndx = ELF64_R_SYM (r_info);
7806 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7807 return FALSE;
7808 }
7809
7810 if ((bfd_link_pic (info)
7811 && (must_be_dyn_reloc (info, r_type)
7812 || (h != NULL
7813 && (!SYMBOLIC_BIND (info, h)
7814 || h->root.type == bfd_link_hash_defweak
7815 || !h->def_regular))))
7816 || (ELIMINATE_COPY_RELOCS
7817 && !bfd_link_pic (info)
7818 && h != NULL
7819 && (h->root.type == bfd_link_hash_defweak
7820 || !h->def_regular)))
7821 ;
7822 else
7823 return TRUE;
7824
7825 if (h != NULL)
7826 {
7827 struct elf_dyn_relocs *p;
7828 struct elf_dyn_relocs **pp;
7829 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7830
7831 /* elf_gc_sweep may have already removed all dyn relocs associated
7832 with local syms for a given section. Also, symbol flags are
7833 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7834 report a dynreloc miscount. */
7835 if (*pp == NULL && info->gc_sections)
7836 return TRUE;
7837
7838 while ((p = *pp) != NULL)
7839 {
7840 if (p->sec == sec)
7841 {
7842 if (!must_be_dyn_reloc (info, r_type))
7843 p->pc_count -= 1;
7844 p->count -= 1;
7845 if (p->count == 0)
7846 *pp = p->next;
7847 return TRUE;
7848 }
7849 pp = &p->next;
7850 }
7851 }
7852 else
7853 {
7854 struct ppc_dyn_relocs *p;
7855 struct ppc_dyn_relocs **pp;
7856 void *vpp;
7857 bfd_boolean is_ifunc;
7858
7859 if (local_syms == NULL)
7860 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7861 if (sym_sec == NULL)
7862 sym_sec = sec;
7863
7864 vpp = &elf_section_data (sym_sec)->local_dynrel;
7865 pp = (struct ppc_dyn_relocs **) vpp;
7866
7867 if (*pp == NULL && info->gc_sections)
7868 return TRUE;
7869
7870 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7871 while ((p = *pp) != NULL)
7872 {
7873 if (p->sec == sec && p->ifunc == is_ifunc)
7874 {
7875 p->count -= 1;
7876 if (p->count == 0)
7877 *pp = p->next;
7878 return TRUE;
7879 }
7880 pp = &p->next;
7881 }
7882 }
7883
7884 /* xgettext:c-format */
7885 _bfd_error_handler (_("dynreloc miscount for %pB, section %pA"),
7886 sec->owner, sec);
7887 bfd_set_error (bfd_error_bad_value);
7888 return FALSE;
7889 }
7890
7891 /* Remove unused Official Procedure Descriptor entries. Currently we
7892 only remove those associated with functions in discarded link-once
7893 sections, or weakly defined functions that have been overridden. It
7894 would be possible to remove many more entries for statically linked
7895 applications. */
7896
7897 bfd_boolean
7898 ppc64_elf_edit_opd (struct bfd_link_info *info)
7899 {
7900 bfd *ibfd;
7901 bfd_boolean some_edited = FALSE;
7902 asection *need_pad = NULL;
7903 struct ppc_link_hash_table *htab;
7904
7905 htab = ppc_hash_table (info);
7906 if (htab == NULL)
7907 return FALSE;
7908
7909 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7910 {
7911 asection *sec;
7912 Elf_Internal_Rela *relstart, *rel, *relend;
7913 Elf_Internal_Shdr *symtab_hdr;
7914 Elf_Internal_Sym *local_syms;
7915 struct _opd_sec_data *opd;
7916 bfd_boolean need_edit, add_aux_fields, broken;
7917 bfd_size_type cnt_16b = 0;
7918
7919 if (!is_ppc64_elf (ibfd))
7920 continue;
7921
7922 sec = bfd_get_section_by_name (ibfd, ".opd");
7923 if (sec == NULL || sec->size == 0)
7924 continue;
7925
7926 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7927 continue;
7928
7929 if (sec->output_section == bfd_abs_section_ptr)
7930 continue;
7931
7932 /* Look through the section relocs. */
7933 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7934 continue;
7935
7936 local_syms = NULL;
7937 symtab_hdr = &elf_symtab_hdr (ibfd);
7938
7939 /* Read the relocations. */
7940 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7941 info->keep_memory);
7942 if (relstart == NULL)
7943 return FALSE;
7944
7945 /* First run through the relocs to check they are sane, and to
7946 determine whether we need to edit this opd section. */
7947 need_edit = FALSE;
7948 broken = FALSE;
7949 need_pad = sec;
7950 relend = relstart + sec->reloc_count;
7951 for (rel = relstart; rel < relend; )
7952 {
7953 enum elf_ppc64_reloc_type r_type;
7954 unsigned long r_symndx;
7955 asection *sym_sec;
7956 struct elf_link_hash_entry *h;
7957 Elf_Internal_Sym *sym;
7958 bfd_vma offset;
7959
7960 /* .opd contains an array of 16 or 24 byte entries. We're
7961 only interested in the reloc pointing to a function entry
7962 point. */
7963 offset = rel->r_offset;
7964 if (rel + 1 == relend
7965 || rel[1].r_offset != offset + 8)
7966 {
7967 /* If someone messes with .opd alignment then after a
7968 "ld -r" we might have padding in the middle of .opd.
7969 Also, there's nothing to prevent someone putting
7970 something silly in .opd with the assembler. No .opd
7971 optimization for them! */
7972 broken_opd:
7973 _bfd_error_handler
7974 (_("%pB: .opd is not a regular array of opd entries"), ibfd);
7975 broken = TRUE;
7976 break;
7977 }
7978
7979 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7980 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7981 {
7982 _bfd_error_handler
7983 /* xgettext:c-format */
7984 (_("%pB: unexpected reloc type %u in .opd section"),
7985 ibfd, r_type);
7986 broken = TRUE;
7987 break;
7988 }
7989
7990 r_symndx = ELF64_R_SYM (rel->r_info);
7991 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7992 r_symndx, ibfd))
7993 goto error_ret;
7994
7995 if (sym_sec == NULL || sym_sec->owner == NULL)
7996 {
7997 const char *sym_name;
7998 if (h != NULL)
7999 sym_name = h->root.root.string;
8000 else
8001 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8002 sym_sec);
8003
8004 _bfd_error_handler
8005 /* xgettext:c-format */
8006 (_("%pB: undefined sym `%s' in .opd section"),
8007 ibfd, sym_name);
8008 broken = TRUE;
8009 break;
8010 }
8011
8012 /* opd entries are always for functions defined in the
8013 current input bfd. If the symbol isn't defined in the
8014 input bfd, then we won't be using the function in this
8015 bfd; It must be defined in a linkonce section in another
8016 bfd, or is weak. It's also possible that we are
8017 discarding the function due to a linker script /DISCARD/,
8018 which we test for via the output_section. */
8019 if (sym_sec->owner != ibfd
8020 || sym_sec->output_section == bfd_abs_section_ptr)
8021 need_edit = TRUE;
8022
8023 rel += 2;
8024 if (rel + 1 == relend
8025 || (rel + 2 < relend
8026 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8027 ++rel;
8028
8029 if (rel == relend)
8030 {
8031 if (sec->size == offset + 24)
8032 {
8033 need_pad = NULL;
8034 break;
8035 }
8036 if (sec->size == offset + 16)
8037 {
8038 cnt_16b++;
8039 break;
8040 }
8041 goto broken_opd;
8042 }
8043 else if (rel + 1 < relend
8044 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8045 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8046 {
8047 if (rel[0].r_offset == offset + 16)
8048 cnt_16b++;
8049 else if (rel[0].r_offset != offset + 24)
8050 goto broken_opd;
8051 }
8052 else
8053 goto broken_opd;
8054 }
8055
8056 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8057
8058 if (!broken && (need_edit || add_aux_fields))
8059 {
8060 Elf_Internal_Rela *write_rel;
8061 Elf_Internal_Shdr *rel_hdr;
8062 bfd_byte *rptr, *wptr;
8063 bfd_byte *new_contents;
8064 bfd_size_type amt;
8065
8066 new_contents = NULL;
8067 amt = OPD_NDX (sec->size) * sizeof (long);
8068 opd = &ppc64_elf_section_data (sec)->u.opd;
8069 opd->adjust = bfd_zalloc (sec->owner, amt);
8070 if (opd->adjust == NULL)
8071 return FALSE;
8072
8073 /* This seems a waste of time as input .opd sections are all
8074 zeros as generated by gcc, but I suppose there's no reason
8075 this will always be so. We might start putting something in
8076 the third word of .opd entries. */
8077 if ((sec->flags & SEC_IN_MEMORY) == 0)
8078 {
8079 bfd_byte *loc;
8080 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8081 {
8082 if (loc != NULL)
8083 free (loc);
8084 error_ret:
8085 if (local_syms != NULL
8086 && symtab_hdr->contents != (unsigned char *) local_syms)
8087 free (local_syms);
8088 if (elf_section_data (sec)->relocs != relstart)
8089 free (relstart);
8090 return FALSE;
8091 }
8092 sec->contents = loc;
8093 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8094 }
8095
8096 elf_section_data (sec)->relocs = relstart;
8097
8098 new_contents = sec->contents;
8099 if (add_aux_fields)
8100 {
8101 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8102 if (new_contents == NULL)
8103 return FALSE;
8104 need_pad = NULL;
8105 }
8106 wptr = new_contents;
8107 rptr = sec->contents;
8108 write_rel = relstart;
8109 for (rel = relstart; rel < relend; )
8110 {
8111 unsigned long r_symndx;
8112 asection *sym_sec;
8113 struct elf_link_hash_entry *h;
8114 struct ppc_link_hash_entry *fdh = NULL;
8115 Elf_Internal_Sym *sym;
8116 long opd_ent_size;
8117 Elf_Internal_Rela *next_rel;
8118 bfd_boolean skip;
8119
8120 r_symndx = ELF64_R_SYM (rel->r_info);
8121 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8122 r_symndx, ibfd))
8123 goto error_ret;
8124
8125 next_rel = rel + 2;
8126 if (next_rel + 1 == relend
8127 || (next_rel + 2 < relend
8128 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8129 ++next_rel;
8130
8131 /* See if the .opd entry is full 24 byte or
8132 16 byte (with fd_aux entry overlapped with next
8133 fd_func). */
8134 opd_ent_size = 24;
8135 if (next_rel == relend)
8136 {
8137 if (sec->size == rel->r_offset + 16)
8138 opd_ent_size = 16;
8139 }
8140 else if (next_rel->r_offset == rel->r_offset + 16)
8141 opd_ent_size = 16;
8142
8143 if (h != NULL
8144 && h->root.root.string[0] == '.')
8145 {
8146 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8147 if (fdh != NULL)
8148 {
8149 fdh = ppc_follow_link (fdh);
8150 if (fdh->elf.root.type != bfd_link_hash_defined
8151 && fdh->elf.root.type != bfd_link_hash_defweak)
8152 fdh = NULL;
8153 }
8154 }
8155
8156 skip = (sym_sec->owner != ibfd
8157 || sym_sec->output_section == bfd_abs_section_ptr);
8158 if (skip)
8159 {
8160 if (fdh != NULL && sym_sec->owner == ibfd)
8161 {
8162 /* Arrange for the function descriptor sym
8163 to be dropped. */
8164 fdh->elf.root.u.def.value = 0;
8165 fdh->elf.root.u.def.section = sym_sec;
8166 }
8167 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8168
8169 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8170 rel = next_rel;
8171 else
8172 while (1)
8173 {
8174 if (!dec_dynrel_count (rel->r_info, sec, info,
8175 NULL, h, sym))
8176 goto error_ret;
8177
8178 if (++rel == next_rel)
8179 break;
8180
8181 r_symndx = ELF64_R_SYM (rel->r_info);
8182 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8183 r_symndx, ibfd))
8184 goto error_ret;
8185 }
8186 }
8187 else
8188 {
8189 /* We'll be keeping this opd entry. */
8190 long adjust;
8191
8192 if (fdh != NULL)
8193 {
8194 /* Redefine the function descriptor symbol to
8195 this location in the opd section. It is
8196 necessary to update the value here rather
8197 than using an array of adjustments as we do
8198 for local symbols, because various places
8199 in the generic ELF code use the value
8200 stored in u.def.value. */
8201 fdh->elf.root.u.def.value = wptr - new_contents;
8202 fdh->adjust_done = 1;
8203 }
8204
8205 /* Local syms are a bit tricky. We could
8206 tweak them as they can be cached, but
8207 we'd need to look through the local syms
8208 for the function descriptor sym which we
8209 don't have at the moment. So keep an
8210 array of adjustments. */
8211 adjust = (wptr - new_contents) - (rptr - sec->contents);
8212 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8213
8214 if (wptr != rptr)
8215 memcpy (wptr, rptr, opd_ent_size);
8216 wptr += opd_ent_size;
8217 if (add_aux_fields && opd_ent_size == 16)
8218 {
8219 memset (wptr, '\0', 8);
8220 wptr += 8;
8221 }
8222
8223 /* We need to adjust any reloc offsets to point to the
8224 new opd entries. */
8225 for ( ; rel != next_rel; ++rel)
8226 {
8227 rel->r_offset += adjust;
8228 if (write_rel != rel)
8229 memcpy (write_rel, rel, sizeof (*rel));
8230 ++write_rel;
8231 }
8232 }
8233
8234 rptr += opd_ent_size;
8235 }
8236
8237 sec->size = wptr - new_contents;
8238 sec->reloc_count = write_rel - relstart;
8239 if (add_aux_fields)
8240 {
8241 free (sec->contents);
8242 sec->contents = new_contents;
8243 }
8244
8245 /* Fudge the header size too, as this is used later in
8246 elf_bfd_final_link if we are emitting relocs. */
8247 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8248 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8249 some_edited = TRUE;
8250 }
8251 else if (elf_section_data (sec)->relocs != relstart)
8252 free (relstart);
8253
8254 if (local_syms != NULL
8255 && symtab_hdr->contents != (unsigned char *) local_syms)
8256 {
8257 if (!info->keep_memory)
8258 free (local_syms);
8259 else
8260 symtab_hdr->contents = (unsigned char *) local_syms;
8261 }
8262 }
8263
8264 if (some_edited)
8265 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8266
8267 /* If we are doing a final link and the last .opd entry is just 16 byte
8268 long, add a 8 byte padding after it. */
8269 if (need_pad != NULL && !bfd_link_relocatable (info))
8270 {
8271 bfd_byte *p;
8272
8273 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8274 {
8275 BFD_ASSERT (need_pad->size > 0);
8276
8277 p = bfd_malloc (need_pad->size + 8);
8278 if (p == NULL)
8279 return FALSE;
8280
8281 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8282 p, 0, need_pad->size))
8283 return FALSE;
8284
8285 need_pad->contents = p;
8286 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8287 }
8288 else
8289 {
8290 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8291 if (p == NULL)
8292 return FALSE;
8293
8294 need_pad->contents = p;
8295 }
8296
8297 memset (need_pad->contents + need_pad->size, 0, 8);
8298 need_pad->size += 8;
8299 }
8300
8301 return TRUE;
8302 }
8303
8304 /* Analyze inline PLT call relocations to see whether calls to locally
8305 defined functions can be converted to direct calls. */
8306
8307 bfd_boolean
8308 ppc64_elf_inline_plt (struct bfd_link_info *info)
8309 {
8310 struct ppc_link_hash_table *htab;
8311 bfd *ibfd;
8312 asection *sec;
8313 bfd_vma low_vma, high_vma, limit;
8314
8315 htab = ppc_hash_table (info);
8316 if (htab == NULL)
8317 return FALSE;
8318
8319 /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is
8320 reduced somewhat to cater for possible stubs that might be added
8321 between the call and its destination. */
8322 if (htab->params->group_size < 0)
8323 {
8324 limit = -htab->params->group_size;
8325 if (limit == 1)
8326 limit = 0x1e00000;
8327 }
8328 else
8329 {
8330 limit = htab->params->group_size;
8331 if (limit == 1)
8332 limit = 0x1c00000;
8333 }
8334
8335 low_vma = -1;
8336 high_vma = 0;
8337 for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next)
8338 if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE))
8339 {
8340 if (low_vma > sec->vma)
8341 low_vma = sec->vma;
8342 if (high_vma < sec->vma + sec->size)
8343 high_vma = sec->vma + sec->size;
8344 }
8345
8346 /* If a "bl" can reach anywhere in local code sections, then we can
8347 convert all inline PLT sequences to direct calls when the symbol
8348 is local. */
8349 if (high_vma - low_vma < limit)
8350 {
8351 htab->can_convert_all_inline_plt = 1;
8352 return TRUE;
8353 }
8354
8355 /* Otherwise, go looking through relocs for cases where a direct
8356 call won't reach. Mark the symbol on any such reloc to disable
8357 the optimization and keep the PLT entry as it seems likely that
8358 this will be better than creating trampolines. Note that this
8359 will disable the optimization for all inline PLT calls to a
8360 particular symbol, not just those that won't reach. The
8361 difficulty in doing a more precise optimization is that the
8362 linker needs to make a decision depending on whether a
8363 particular R_PPC64_PLTCALL insn can be turned into a direct
8364 call, for each of the R_PPC64_PLTSEQ and R_PPC64_PLT16* insns in
8365 the sequence, and there is nothing that ties those relocs
8366 together except their symbol. */
8367
8368 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8369 {
8370 Elf_Internal_Shdr *symtab_hdr;
8371 Elf_Internal_Sym *local_syms;
8372
8373 if (!is_ppc64_elf (ibfd))
8374 continue;
8375
8376 local_syms = NULL;
8377 symtab_hdr = &elf_symtab_hdr (ibfd);
8378
8379 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8380 if (ppc64_elf_section_data (sec)->has_pltcall
8381 && !bfd_is_abs_section (sec->output_section))
8382 {
8383 Elf_Internal_Rela *relstart, *rel, *relend;
8384
8385 /* Read the relocations. */
8386 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8387 info->keep_memory);
8388 if (relstart == NULL)
8389 return FALSE;
8390
8391 relend = relstart + sec->reloc_count;
8392 for (rel = relstart; rel < relend; )
8393 {
8394 enum elf_ppc64_reloc_type r_type;
8395 unsigned long r_symndx;
8396 asection *sym_sec;
8397 struct elf_link_hash_entry *h;
8398 Elf_Internal_Sym *sym;
8399 unsigned char *tls_maskp;
8400
8401 r_type = ELF64_R_TYPE (rel->r_info);
8402 if (r_type != R_PPC64_PLTCALL)
8403 continue;
8404
8405 r_symndx = ELF64_R_SYM (rel->r_info);
8406 if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms,
8407 r_symndx, ibfd))
8408 {
8409 if (elf_section_data (sec)->relocs != relstart)
8410 free (relstart);
8411 if (local_syms != NULL
8412 && symtab_hdr->contents != (unsigned char *) local_syms)
8413 free (local_syms);
8414 return FALSE;
8415 }
8416
8417 if (sym_sec != NULL && sym_sec->output_section != NULL)
8418 {
8419 bfd_vma from, to;
8420 if (h != NULL)
8421 to = h->root.u.def.value;
8422 else
8423 to = sym->st_value;
8424 to += (rel->r_addend
8425 + sym_sec->output_offset
8426 + sym_sec->output_section->vma);
8427 from = (rel->r_offset
8428 + sec->output_offset
8429 + sec->output_section->vma);
8430 if (to - from + limit < 2 * limit)
8431 *tls_maskp &= ~PLT_KEEP;
8432 }
8433 }
8434 if (elf_section_data (sec)->relocs != relstart)
8435 free (relstart);
8436 }
8437
8438 if (local_syms != NULL
8439 && symtab_hdr->contents != (unsigned char *) local_syms)
8440 {
8441 if (!info->keep_memory)
8442 free (local_syms);
8443 else
8444 symtab_hdr->contents = (unsigned char *) local_syms;
8445 }
8446 }
8447
8448 return TRUE;
8449 }
8450
8451 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8452
8453 asection *
8454 ppc64_elf_tls_setup (struct bfd_link_info *info)
8455 {
8456 struct ppc_link_hash_table *htab;
8457
8458 htab = ppc_hash_table (info);
8459 if (htab == NULL)
8460 return NULL;
8461
8462 if (abiversion (info->output_bfd) == 1)
8463 htab->opd_abi = 1;
8464
8465 if (htab->params->no_multi_toc)
8466 htab->do_multi_toc = 0;
8467 else if (!htab->do_multi_toc)
8468 htab->params->no_multi_toc = 1;
8469
8470 /* Default to --no-plt-localentry, as this option can cause problems
8471 with symbol interposition. For example, glibc libpthread.so and
8472 libc.so duplicate many pthread symbols, with a fallback
8473 implementation in libc.so. In some cases the fallback does more
8474 work than the pthread implementation. __pthread_condattr_destroy
8475 is one such symbol: the libpthread.so implementation is
8476 localentry:0 while the libc.so implementation is localentry:8.
8477 An app that "cleverly" uses dlopen to only load necessary
8478 libraries at runtime may omit loading libpthread.so when not
8479 running multi-threaded, which then results in the libc.so
8480 fallback symbols being used and ld.so complaining. Now there
8481 are workarounds in ld (see non_zero_localentry) to detect the
8482 pthread situation, but that may not be the only case where
8483 --plt-localentry can cause trouble. */
8484 if (htab->params->plt_localentry0 < 0)
8485 htab->params->plt_localentry0 = 0;
8486 if (htab->params->plt_localentry0
8487 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8488 FALSE, FALSE, FALSE) == NULL)
8489 _bfd_error_handler
8490 (_("warning: --plt-localentry is especially dangerous without "
8491 "ld.so support to detect ABI violations"));
8492
8493 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8494 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8495 FALSE, FALSE, TRUE));
8496 /* Move dynamic linking info to the function descriptor sym. */
8497 if (htab->tls_get_addr != NULL)
8498 func_desc_adjust (&htab->tls_get_addr->elf, info);
8499 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8500 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8501 FALSE, FALSE, TRUE));
8502 if (htab->params->tls_get_addr_opt)
8503 {
8504 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8505
8506 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8507 FALSE, FALSE, TRUE);
8508 if (opt != NULL)
8509 func_desc_adjust (opt, info);
8510 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8511 FALSE, FALSE, TRUE);
8512 if (opt_fd != NULL
8513 && (opt_fd->root.type == bfd_link_hash_defined
8514 || opt_fd->root.type == bfd_link_hash_defweak))
8515 {
8516 /* If glibc supports an optimized __tls_get_addr call stub,
8517 signalled by the presence of __tls_get_addr_opt, and we'll
8518 be calling __tls_get_addr via a plt call stub, then
8519 make __tls_get_addr point to __tls_get_addr_opt. */
8520 tga_fd = &htab->tls_get_addr_fd->elf;
8521 if (htab->elf.dynamic_sections_created
8522 && tga_fd != NULL
8523 && (tga_fd->type == STT_FUNC
8524 || tga_fd->needs_plt)
8525 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8526 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8527 {
8528 struct plt_entry *ent;
8529
8530 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8531 if (ent->plt.refcount > 0)
8532 break;
8533 if (ent != NULL)
8534 {
8535 tga_fd->root.type = bfd_link_hash_indirect;
8536 tga_fd->root.u.i.link = &opt_fd->root;
8537 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8538 opt_fd->mark = 1;
8539 if (opt_fd->dynindx != -1)
8540 {
8541 /* Use __tls_get_addr_opt in dynamic relocations. */
8542 opt_fd->dynindx = -1;
8543 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8544 opt_fd->dynstr_index);
8545 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8546 return NULL;
8547 }
8548 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8549 tga = &htab->tls_get_addr->elf;
8550 if (opt != NULL && tga != NULL)
8551 {
8552 tga->root.type = bfd_link_hash_indirect;
8553 tga->root.u.i.link = &opt->root;
8554 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8555 opt->mark = 1;
8556 _bfd_elf_link_hash_hide_symbol (info, opt,
8557 tga->forced_local);
8558 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8559 }
8560 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8561 htab->tls_get_addr_fd->is_func_descriptor = 1;
8562 if (htab->tls_get_addr != NULL)
8563 {
8564 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8565 htab->tls_get_addr->is_func = 1;
8566 }
8567 }
8568 }
8569 }
8570 else if (htab->params->tls_get_addr_opt < 0)
8571 htab->params->tls_get_addr_opt = 0;
8572 }
8573 return _bfd_elf_tls_setup (info->output_bfd, info);
8574 }
8575
8576 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8577 HASH1 or HASH2. */
8578
8579 static bfd_boolean
8580 branch_reloc_hash_match (const bfd *ibfd,
8581 const Elf_Internal_Rela *rel,
8582 const struct ppc_link_hash_entry *hash1,
8583 const struct ppc_link_hash_entry *hash2)
8584 {
8585 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8586 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8587 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8588
8589 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8590 {
8591 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8592 struct elf_link_hash_entry *h;
8593
8594 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8595 h = elf_follow_link (h);
8596 if (h == &hash1->elf || h == &hash2->elf)
8597 return TRUE;
8598 }
8599 return FALSE;
8600 }
8601
8602 /* Run through all the TLS relocs looking for optimization
8603 opportunities. The linker has been hacked (see ppc64elf.em) to do
8604 a preliminary section layout so that we know the TLS segment
8605 offsets. We can't optimize earlier because some optimizations need
8606 to know the tp offset, and we need to optimize before allocating
8607 dynamic relocations. */
8608
8609 bfd_boolean
8610 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8611 {
8612 bfd *ibfd;
8613 asection *sec;
8614 struct ppc_link_hash_table *htab;
8615 unsigned char *toc_ref;
8616 int pass;
8617
8618 if (!bfd_link_executable (info))
8619 return TRUE;
8620
8621 htab = ppc_hash_table (info);
8622 if (htab == NULL)
8623 return FALSE;
8624
8625 /* Make two passes over the relocs. On the first pass, mark toc
8626 entries involved with tls relocs, and check that tls relocs
8627 involved in setting up a tls_get_addr call are indeed followed by
8628 such a call. If they are not, we can't do any tls optimization.
8629 On the second pass twiddle tls_mask flags to notify
8630 relocate_section that optimization can be done, and adjust got
8631 and plt refcounts. */
8632 toc_ref = NULL;
8633 for (pass = 0; pass < 2; ++pass)
8634 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8635 {
8636 Elf_Internal_Sym *locsyms = NULL;
8637 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8638
8639 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8640 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8641 {
8642 Elf_Internal_Rela *relstart, *rel, *relend;
8643 bfd_boolean found_tls_get_addr_arg = 0;
8644
8645 /* Read the relocations. */
8646 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8647 info->keep_memory);
8648 if (relstart == NULL)
8649 {
8650 free (toc_ref);
8651 return FALSE;
8652 }
8653
8654 relend = relstart + sec->reloc_count;
8655 for (rel = relstart; rel < relend; rel++)
8656 {
8657 enum elf_ppc64_reloc_type r_type;
8658 unsigned long r_symndx;
8659 struct elf_link_hash_entry *h;
8660 Elf_Internal_Sym *sym;
8661 asection *sym_sec;
8662 unsigned char *tls_mask;
8663 unsigned char tls_set, tls_clear, tls_type = 0;
8664 bfd_vma value;
8665 bfd_boolean ok_tprel, is_local;
8666 long toc_ref_index = 0;
8667 int expecting_tls_get_addr = 0;
8668 bfd_boolean ret = FALSE;
8669
8670 r_symndx = ELF64_R_SYM (rel->r_info);
8671 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8672 r_symndx, ibfd))
8673 {
8674 err_free_rel:
8675 if (elf_section_data (sec)->relocs != relstart)
8676 free (relstart);
8677 if (toc_ref != NULL)
8678 free (toc_ref);
8679 if (locsyms != NULL
8680 && (elf_symtab_hdr (ibfd).contents
8681 != (unsigned char *) locsyms))
8682 free (locsyms);
8683 return ret;
8684 }
8685
8686 if (h != NULL)
8687 {
8688 if (h->root.type == bfd_link_hash_defined
8689 || h->root.type == bfd_link_hash_defweak)
8690 value = h->root.u.def.value;
8691 else if (h->root.type == bfd_link_hash_undefweak)
8692 value = 0;
8693 else
8694 {
8695 found_tls_get_addr_arg = 0;
8696 continue;
8697 }
8698 }
8699 else
8700 /* Symbols referenced by TLS relocs must be of type
8701 STT_TLS. So no need for .opd local sym adjust. */
8702 value = sym->st_value;
8703
8704 ok_tprel = FALSE;
8705 is_local = FALSE;
8706 if (h == NULL
8707 || !h->def_dynamic)
8708 {
8709 is_local = TRUE;
8710 if (h != NULL
8711 && h->root.type == bfd_link_hash_undefweak)
8712 ok_tprel = TRUE;
8713 else if (sym_sec != NULL
8714 && sym_sec->output_section != NULL)
8715 {
8716 value += sym_sec->output_offset;
8717 value += sym_sec->output_section->vma;
8718 value -= htab->elf.tls_sec->vma;
8719 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8720 < (bfd_vma) 1 << 32);
8721 }
8722 }
8723
8724 r_type = ELF64_R_TYPE (rel->r_info);
8725 /* If this section has old-style __tls_get_addr calls
8726 without marker relocs, then check that each
8727 __tls_get_addr call reloc is preceded by a reloc
8728 that conceivably belongs to the __tls_get_addr arg
8729 setup insn. If we don't find matching arg setup
8730 relocs, don't do any tls optimization. */
8731 if (pass == 0
8732 && sec->has_tls_get_addr_call
8733 && h != NULL
8734 && (h == &htab->tls_get_addr->elf
8735 || h == &htab->tls_get_addr_fd->elf)
8736 && !found_tls_get_addr_arg
8737 && is_branch_reloc (r_type))
8738 {
8739 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8740 "TLS optimization disabled\n"),
8741 ibfd, sec, rel->r_offset);
8742 ret = TRUE;
8743 goto err_free_rel;
8744 }
8745
8746 found_tls_get_addr_arg = 0;
8747 switch (r_type)
8748 {
8749 case R_PPC64_GOT_TLSLD16:
8750 case R_PPC64_GOT_TLSLD16_LO:
8751 expecting_tls_get_addr = 1;
8752 found_tls_get_addr_arg = 1;
8753 /* Fall through. */
8754
8755 case R_PPC64_GOT_TLSLD16_HI:
8756 case R_PPC64_GOT_TLSLD16_HA:
8757 /* These relocs should never be against a symbol
8758 defined in a shared lib. Leave them alone if
8759 that turns out to be the case. */
8760 if (!is_local)
8761 continue;
8762
8763 /* LD -> LE */
8764 tls_set = 0;
8765 tls_clear = TLS_LD;
8766 tls_type = TLS_TLS | TLS_LD;
8767 break;
8768
8769 case R_PPC64_GOT_TLSGD16:
8770 case R_PPC64_GOT_TLSGD16_LO:
8771 expecting_tls_get_addr = 1;
8772 found_tls_get_addr_arg = 1;
8773 /* Fall through. */
8774
8775 case R_PPC64_GOT_TLSGD16_HI:
8776 case R_PPC64_GOT_TLSGD16_HA:
8777 if (ok_tprel)
8778 /* GD -> LE */
8779 tls_set = 0;
8780 else
8781 /* GD -> IE */
8782 tls_set = TLS_TLS | TLS_TPRELGD;
8783 tls_clear = TLS_GD;
8784 tls_type = TLS_TLS | TLS_GD;
8785 break;
8786
8787 case R_PPC64_GOT_TPREL16_DS:
8788 case R_PPC64_GOT_TPREL16_LO_DS:
8789 case R_PPC64_GOT_TPREL16_HI:
8790 case R_PPC64_GOT_TPREL16_HA:
8791 if (ok_tprel)
8792 {
8793 /* IE -> LE */
8794 tls_set = 0;
8795 tls_clear = TLS_TPREL;
8796 tls_type = TLS_TLS | TLS_TPREL;
8797 break;
8798 }
8799 continue;
8800
8801 case R_PPC64_TLSGD:
8802 case R_PPC64_TLSLD:
8803 if (rel + 1 < relend
8804 && is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info)))
8805 {
8806 if (pass != 0
8807 && ELF64_R_TYPE (rel[1].r_info) != R_PPC64_PLTSEQ)
8808 {
8809 r_symndx = ELF64_R_SYM (rel[1].r_info);
8810 if (!get_sym_h (&h, NULL, NULL, NULL, &locsyms,
8811 r_symndx, ibfd))
8812 goto err_free_rel;
8813 if (h != NULL)
8814 {
8815 struct plt_entry *ent = NULL;
8816
8817 for (ent = h->plt.plist;
8818 ent != NULL;
8819 ent = ent->next)
8820 if (ent->addend == rel[1].r_addend)
8821 break;
8822
8823 if (ent != NULL
8824 && ent->plt.refcount > 0)
8825 ent->plt.refcount -= 1;
8826 }
8827 }
8828 continue;
8829 }
8830 found_tls_get_addr_arg = 1;
8831 /* Fall through. */
8832
8833 case R_PPC64_TLS:
8834 case R_PPC64_TOC16:
8835 case R_PPC64_TOC16_LO:
8836 if (sym_sec == NULL || sym_sec != toc)
8837 continue;
8838
8839 /* Mark this toc entry as referenced by a TLS
8840 code sequence. We can do that now in the
8841 case of R_PPC64_TLS, and after checking for
8842 tls_get_addr for the TOC16 relocs. */
8843 if (toc_ref == NULL)
8844 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8845 if (toc_ref == NULL)
8846 goto err_free_rel;
8847
8848 if (h != NULL)
8849 value = h->root.u.def.value;
8850 else
8851 value = sym->st_value;
8852 value += rel->r_addend;
8853 if (value % 8 != 0)
8854 continue;
8855 BFD_ASSERT (value < toc->size
8856 && toc->output_offset % 8 == 0);
8857 toc_ref_index = (value + toc->output_offset) / 8;
8858 if (r_type == R_PPC64_TLS
8859 || r_type == R_PPC64_TLSGD
8860 || r_type == R_PPC64_TLSLD)
8861 {
8862 toc_ref[toc_ref_index] = 1;
8863 continue;
8864 }
8865
8866 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8867 continue;
8868
8869 tls_set = 0;
8870 tls_clear = 0;
8871 expecting_tls_get_addr = 2;
8872 break;
8873
8874 case R_PPC64_TPREL64:
8875 if (pass == 0
8876 || sec != toc
8877 || toc_ref == NULL
8878 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8879 continue;
8880 if (ok_tprel)
8881 {
8882 /* IE -> LE */
8883 tls_set = TLS_EXPLICIT;
8884 tls_clear = TLS_TPREL;
8885 break;
8886 }
8887 continue;
8888
8889 case R_PPC64_DTPMOD64:
8890 if (pass == 0
8891 || sec != toc
8892 || toc_ref == NULL
8893 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8894 continue;
8895 if (rel + 1 < relend
8896 && (rel[1].r_info
8897 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8898 && rel[1].r_offset == rel->r_offset + 8)
8899 {
8900 if (ok_tprel)
8901 /* GD -> LE */
8902 tls_set = TLS_EXPLICIT | TLS_GD;
8903 else
8904 /* GD -> IE */
8905 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8906 tls_clear = TLS_GD;
8907 }
8908 else
8909 {
8910 if (!is_local)
8911 continue;
8912
8913 /* LD -> LE */
8914 tls_set = TLS_EXPLICIT;
8915 tls_clear = TLS_LD;
8916 }
8917 break;
8918
8919 default:
8920 continue;
8921 }
8922
8923 if (pass == 0)
8924 {
8925 if (!expecting_tls_get_addr
8926 || !sec->has_tls_get_addr_call)
8927 continue;
8928
8929 if (rel + 1 < relend
8930 && branch_reloc_hash_match (ibfd, rel + 1,
8931 htab->tls_get_addr,
8932 htab->tls_get_addr_fd))
8933 {
8934 if (expecting_tls_get_addr == 2)
8935 {
8936 /* Check for toc tls entries. */
8937 unsigned char *toc_tls;
8938 int retval;
8939
8940 retval = get_tls_mask (&toc_tls, NULL, NULL,
8941 &locsyms,
8942 rel, ibfd);
8943 if (retval == 0)
8944 goto err_free_rel;
8945 if (toc_tls != NULL)
8946 {
8947 if ((*toc_tls & TLS_TLS) != 0
8948 && ((*toc_tls & (TLS_GD | TLS_LD)) != 0))
8949 found_tls_get_addr_arg = 1;
8950 if (retval > 1)
8951 toc_ref[toc_ref_index] = 1;
8952 }
8953 }
8954 continue;
8955 }
8956
8957 /* Uh oh, we didn't find the expected call. We
8958 could just mark this symbol to exclude it
8959 from tls optimization but it's safer to skip
8960 the entire optimization. */
8961 /* xgettext:c-format */
8962 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8963 "TLS optimization disabled\n"),
8964 ibfd, sec, rel->r_offset);
8965 ret = TRUE;
8966 goto err_free_rel;
8967 }
8968
8969 /* If we don't have old-style __tls_get_addr calls
8970 without TLSGD/TLSLD marker relocs, and we haven't
8971 found a new-style __tls_get_addr call with a
8972 marker for this symbol, then we either have a
8973 broken object file or an -mlongcall style
8974 indirect call to __tls_get_addr without a marker.
8975 Disable optimization in this case. */
8976 if ((tls_clear & (TLS_GD | TLS_LD)) != 0
8977 && (tls_set & TLS_EXPLICIT) == 0
8978 && !sec->has_tls_get_addr_call
8979 && ((*tls_mask & (TLS_TLS | TLS_MARK))
8980 != (TLS_TLS | TLS_MARK)))
8981 continue;
8982
8983 if (expecting_tls_get_addr)
8984 {
8985 struct plt_entry *ent = NULL;
8986
8987 if (htab->tls_get_addr != NULL)
8988 for (ent = htab->tls_get_addr->elf.plt.plist;
8989 ent != NULL;
8990 ent = ent->next)
8991 if (ent->addend == 0)
8992 break;
8993
8994 if (ent == NULL && htab->tls_get_addr_fd != NULL)
8995 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8996 ent != NULL;
8997 ent = ent->next)
8998 if (ent->addend == 0)
8999 break;
9000
9001 if (ent != NULL
9002 && ent->plt.refcount > 0)
9003 ent->plt.refcount -= 1;
9004 }
9005
9006 if (tls_clear == 0)
9007 continue;
9008
9009 if ((tls_set & TLS_EXPLICIT) == 0)
9010 {
9011 struct got_entry *ent;
9012
9013 /* Adjust got entry for this reloc. */
9014 if (h != NULL)
9015 ent = h->got.glist;
9016 else
9017 ent = elf_local_got_ents (ibfd)[r_symndx];
9018
9019 for (; ent != NULL; ent = ent->next)
9020 if (ent->addend == rel->r_addend
9021 && ent->owner == ibfd
9022 && ent->tls_type == tls_type)
9023 break;
9024 if (ent == NULL)
9025 abort ();
9026
9027 if (tls_set == 0)
9028 {
9029 /* We managed to get rid of a got entry. */
9030 if (ent->got.refcount > 0)
9031 ent->got.refcount -= 1;
9032 }
9033 }
9034 else
9035 {
9036 /* If we got rid of a DTPMOD/DTPREL reloc pair then
9037 we'll lose one or two dyn relocs. */
9038 if (!dec_dynrel_count (rel->r_info, sec, info,
9039 NULL, h, sym))
9040 return FALSE;
9041
9042 if (tls_set == (TLS_EXPLICIT | TLS_GD))
9043 {
9044 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
9045 NULL, h, sym))
9046 return FALSE;
9047 }
9048 }
9049
9050 *tls_mask |= tls_set;
9051 *tls_mask &= ~tls_clear;
9052 }
9053
9054 if (elf_section_data (sec)->relocs != relstart)
9055 free (relstart);
9056 }
9057
9058 if (locsyms != NULL
9059 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
9060 {
9061 if (!info->keep_memory)
9062 free (locsyms);
9063 else
9064 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
9065 }
9066 }
9067
9068 if (toc_ref != NULL)
9069 free (toc_ref);
9070 htab->do_tls_opt = 1;
9071 return TRUE;
9072 }
9073
9074 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
9075 the values of any global symbols in a toc section that has been
9076 edited. Globals in toc sections should be a rarity, so this function
9077 sets a flag if any are found in toc sections other than the one just
9078 edited, so that further hash table traversals can be avoided. */
9079
9080 struct adjust_toc_info
9081 {
9082 asection *toc;
9083 unsigned long *skip;
9084 bfd_boolean global_toc_syms;
9085 };
9086
9087 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
9088
9089 static bfd_boolean
9090 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
9091 {
9092 struct ppc_link_hash_entry *eh;
9093 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
9094 unsigned long i;
9095
9096 if (h->root.type != bfd_link_hash_defined
9097 && h->root.type != bfd_link_hash_defweak)
9098 return TRUE;
9099
9100 eh = (struct ppc_link_hash_entry *) h;
9101 if (eh->adjust_done)
9102 return TRUE;
9103
9104 if (eh->elf.root.u.def.section == toc_inf->toc)
9105 {
9106 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
9107 i = toc_inf->toc->rawsize >> 3;
9108 else
9109 i = eh->elf.root.u.def.value >> 3;
9110
9111 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
9112 {
9113 _bfd_error_handler
9114 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
9115 do
9116 ++i;
9117 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
9118 eh->elf.root.u.def.value = (bfd_vma) i << 3;
9119 }
9120
9121 eh->elf.root.u.def.value -= toc_inf->skip[i];
9122 eh->adjust_done = 1;
9123 }
9124 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
9125 toc_inf->global_toc_syms = TRUE;
9126
9127 return TRUE;
9128 }
9129
9130 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
9131 on a _LO variety toc/got reloc. */
9132
9133 static bfd_boolean
9134 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
9135 {
9136 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
9137 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
9138 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
9139 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
9140 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
9141 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
9142 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
9143 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
9144 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
9145 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
9146 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
9147 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
9148 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
9149 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
9150 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
9151 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
9152 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
9153 /* Exclude lfqu by testing reloc. If relocs are ever
9154 defined for the reduced D field in psq_lu then those
9155 will need testing too. */
9156 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9157 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
9158 && (insn & 1) == 0)
9159 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
9160 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
9161 /* Exclude stfqu. psq_stu as above for psq_lu. */
9162 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9163 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
9164 && (insn & 1) == 0));
9165 }
9166
9167 /* Examine all relocs referencing .toc sections in order to remove
9168 unused .toc entries. */
9169
9170 bfd_boolean
9171 ppc64_elf_edit_toc (struct bfd_link_info *info)
9172 {
9173 bfd *ibfd;
9174 struct adjust_toc_info toc_inf;
9175 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9176
9177 htab->do_toc_opt = 1;
9178 toc_inf.global_toc_syms = TRUE;
9179 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9180 {
9181 asection *toc, *sec;
9182 Elf_Internal_Shdr *symtab_hdr;
9183 Elf_Internal_Sym *local_syms;
9184 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
9185 unsigned long *skip, *drop;
9186 unsigned char *used;
9187 unsigned char *keep, last, some_unused;
9188
9189 if (!is_ppc64_elf (ibfd))
9190 continue;
9191
9192 toc = bfd_get_section_by_name (ibfd, ".toc");
9193 if (toc == NULL
9194 || toc->size == 0
9195 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
9196 || discarded_section (toc))
9197 continue;
9198
9199 toc_relocs = NULL;
9200 local_syms = NULL;
9201 symtab_hdr = &elf_symtab_hdr (ibfd);
9202
9203 /* Look at sections dropped from the final link. */
9204 skip = NULL;
9205 relstart = NULL;
9206 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9207 {
9208 if (sec->reloc_count == 0
9209 || !discarded_section (sec)
9210 || get_opd_info (sec)
9211 || (sec->flags & SEC_ALLOC) == 0
9212 || (sec->flags & SEC_DEBUGGING) != 0)
9213 continue;
9214
9215 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9216 if (relstart == NULL)
9217 goto error_ret;
9218
9219 /* Run through the relocs to see which toc entries might be
9220 unused. */
9221 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9222 {
9223 enum elf_ppc64_reloc_type r_type;
9224 unsigned long r_symndx;
9225 asection *sym_sec;
9226 struct elf_link_hash_entry *h;
9227 Elf_Internal_Sym *sym;
9228 bfd_vma val;
9229
9230 r_type = ELF64_R_TYPE (rel->r_info);
9231 switch (r_type)
9232 {
9233 default:
9234 continue;
9235
9236 case R_PPC64_TOC16:
9237 case R_PPC64_TOC16_LO:
9238 case R_PPC64_TOC16_HI:
9239 case R_PPC64_TOC16_HA:
9240 case R_PPC64_TOC16_DS:
9241 case R_PPC64_TOC16_LO_DS:
9242 break;
9243 }
9244
9245 r_symndx = ELF64_R_SYM (rel->r_info);
9246 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9247 r_symndx, ibfd))
9248 goto error_ret;
9249
9250 if (sym_sec != toc)
9251 continue;
9252
9253 if (h != NULL)
9254 val = h->root.u.def.value;
9255 else
9256 val = sym->st_value;
9257 val += rel->r_addend;
9258
9259 if (val >= toc->size)
9260 continue;
9261
9262 /* Anything in the toc ought to be aligned to 8 bytes.
9263 If not, don't mark as unused. */
9264 if (val & 7)
9265 continue;
9266
9267 if (skip == NULL)
9268 {
9269 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9270 if (skip == NULL)
9271 goto error_ret;
9272 }
9273
9274 skip[val >> 3] = ref_from_discarded;
9275 }
9276
9277 if (elf_section_data (sec)->relocs != relstart)
9278 free (relstart);
9279 }
9280
9281 /* For largetoc loads of address constants, we can convert
9282 . addis rx,2,addr@got@ha
9283 . ld ry,addr@got@l(rx)
9284 to
9285 . addis rx,2,addr@toc@ha
9286 . addi ry,rx,addr@toc@l
9287 when addr is within 2G of the toc pointer. This then means
9288 that the word storing "addr" in the toc is no longer needed. */
9289
9290 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9291 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9292 && toc->reloc_count != 0)
9293 {
9294 /* Read toc relocs. */
9295 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9296 info->keep_memory);
9297 if (toc_relocs == NULL)
9298 goto error_ret;
9299
9300 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9301 {
9302 enum elf_ppc64_reloc_type r_type;
9303 unsigned long r_symndx;
9304 asection *sym_sec;
9305 struct elf_link_hash_entry *h;
9306 Elf_Internal_Sym *sym;
9307 bfd_vma val, addr;
9308
9309 r_type = ELF64_R_TYPE (rel->r_info);
9310 if (r_type != R_PPC64_ADDR64)
9311 continue;
9312
9313 r_symndx = ELF64_R_SYM (rel->r_info);
9314 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9315 r_symndx, ibfd))
9316 goto error_ret;
9317
9318 if (sym_sec == NULL
9319 || sym_sec->output_section == NULL
9320 || discarded_section (sym_sec))
9321 continue;
9322
9323 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9324 continue;
9325
9326 if (h != NULL)
9327 {
9328 if (h->type == STT_GNU_IFUNC)
9329 continue;
9330 val = h->root.u.def.value;
9331 }
9332 else
9333 {
9334 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9335 continue;
9336 val = sym->st_value;
9337 }
9338 val += rel->r_addend;
9339 val += sym_sec->output_section->vma + sym_sec->output_offset;
9340
9341 /* We don't yet know the exact toc pointer value, but we
9342 know it will be somewhere in the toc section. Don't
9343 optimize if the difference from any possible toc
9344 pointer is outside [ff..f80008000, 7fff7fff]. */
9345 addr = toc->output_section->vma + TOC_BASE_OFF;
9346 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9347 continue;
9348
9349 addr = toc->output_section->vma + toc->output_section->rawsize;
9350 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9351 continue;
9352
9353 if (skip == NULL)
9354 {
9355 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9356 if (skip == NULL)
9357 goto error_ret;
9358 }
9359
9360 skip[rel->r_offset >> 3]
9361 |= can_optimize | ((rel - toc_relocs) << 2);
9362 }
9363 }
9364
9365 if (skip == NULL)
9366 continue;
9367
9368 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9369 if (used == NULL)
9370 {
9371 error_ret:
9372 if (local_syms != NULL
9373 && symtab_hdr->contents != (unsigned char *) local_syms)
9374 free (local_syms);
9375 if (sec != NULL
9376 && relstart != NULL
9377 && elf_section_data (sec)->relocs != relstart)
9378 free (relstart);
9379 if (toc_relocs != NULL
9380 && elf_section_data (toc)->relocs != toc_relocs)
9381 free (toc_relocs);
9382 if (skip != NULL)
9383 free (skip);
9384 return FALSE;
9385 }
9386
9387 /* Now check all kept sections that might reference the toc.
9388 Check the toc itself last. */
9389 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9390 : ibfd->sections);
9391 sec != NULL;
9392 sec = (sec == toc ? NULL
9393 : sec->next == NULL ? toc
9394 : sec->next == toc && toc->next ? toc->next
9395 : sec->next))
9396 {
9397 int repeat;
9398
9399 if (sec->reloc_count == 0
9400 || discarded_section (sec)
9401 || get_opd_info (sec)
9402 || (sec->flags & SEC_ALLOC) == 0
9403 || (sec->flags & SEC_DEBUGGING) != 0)
9404 continue;
9405
9406 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9407 info->keep_memory);
9408 if (relstart == NULL)
9409 {
9410 free (used);
9411 goto error_ret;
9412 }
9413
9414 /* Mark toc entries referenced as used. */
9415 do
9416 {
9417 repeat = 0;
9418 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9419 {
9420 enum elf_ppc64_reloc_type r_type;
9421 unsigned long r_symndx;
9422 asection *sym_sec;
9423 struct elf_link_hash_entry *h;
9424 Elf_Internal_Sym *sym;
9425 bfd_vma val;
9426 enum {no_check, check_lo, check_ha} insn_check;
9427
9428 r_type = ELF64_R_TYPE (rel->r_info);
9429 switch (r_type)
9430 {
9431 default:
9432 insn_check = no_check;
9433 break;
9434
9435 case R_PPC64_GOT_TLSLD16_HA:
9436 case R_PPC64_GOT_TLSGD16_HA:
9437 case R_PPC64_GOT_TPREL16_HA:
9438 case R_PPC64_GOT_DTPREL16_HA:
9439 case R_PPC64_GOT16_HA:
9440 case R_PPC64_TOC16_HA:
9441 insn_check = check_ha;
9442 break;
9443
9444 case R_PPC64_GOT_TLSLD16_LO:
9445 case R_PPC64_GOT_TLSGD16_LO:
9446 case R_PPC64_GOT_TPREL16_LO_DS:
9447 case R_PPC64_GOT_DTPREL16_LO_DS:
9448 case R_PPC64_GOT16_LO:
9449 case R_PPC64_GOT16_LO_DS:
9450 case R_PPC64_TOC16_LO:
9451 case R_PPC64_TOC16_LO_DS:
9452 insn_check = check_lo;
9453 break;
9454 }
9455
9456 if (insn_check != no_check)
9457 {
9458 bfd_vma off = rel->r_offset & ~3;
9459 unsigned char buf[4];
9460 unsigned int insn;
9461
9462 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9463 {
9464 free (used);
9465 goto error_ret;
9466 }
9467 insn = bfd_get_32 (ibfd, buf);
9468 if (insn_check == check_lo
9469 ? !ok_lo_toc_insn (insn, r_type)
9470 : ((insn & ((0x3f << 26) | 0x1f << 16))
9471 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9472 {
9473 char str[12];
9474
9475 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9476 sprintf (str, "%#08x", insn);
9477 info->callbacks->einfo
9478 /* xgettext:c-format */
9479 (_("%H: toc optimization is not supported for"
9480 " %s instruction\n"),
9481 ibfd, sec, rel->r_offset & ~3, str);
9482 }
9483 }
9484
9485 switch (r_type)
9486 {
9487 case R_PPC64_TOC16:
9488 case R_PPC64_TOC16_LO:
9489 case R_PPC64_TOC16_HI:
9490 case R_PPC64_TOC16_HA:
9491 case R_PPC64_TOC16_DS:
9492 case R_PPC64_TOC16_LO_DS:
9493 /* In case we're taking addresses of toc entries. */
9494 case R_PPC64_ADDR64:
9495 break;
9496
9497 default:
9498 continue;
9499 }
9500
9501 r_symndx = ELF64_R_SYM (rel->r_info);
9502 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9503 r_symndx, ibfd))
9504 {
9505 free (used);
9506 goto error_ret;
9507 }
9508
9509 if (sym_sec != toc)
9510 continue;
9511
9512 if (h != NULL)
9513 val = h->root.u.def.value;
9514 else
9515 val = sym->st_value;
9516 val += rel->r_addend;
9517
9518 if (val >= toc->size)
9519 continue;
9520
9521 if ((skip[val >> 3] & can_optimize) != 0)
9522 {
9523 bfd_vma off;
9524 unsigned char opc;
9525
9526 switch (r_type)
9527 {
9528 case R_PPC64_TOC16_HA:
9529 break;
9530
9531 case R_PPC64_TOC16_LO_DS:
9532 off = rel->r_offset;
9533 off += (bfd_big_endian (ibfd) ? -2 : 3);
9534 if (!bfd_get_section_contents (ibfd, sec, &opc,
9535 off, 1))
9536 {
9537 free (used);
9538 goto error_ret;
9539 }
9540 if ((opc & (0x3f << 2)) == (58u << 2))
9541 break;
9542 /* Fall through. */
9543
9544 default:
9545 /* Wrong sort of reloc, or not a ld. We may
9546 as well clear ref_from_discarded too. */
9547 skip[val >> 3] = 0;
9548 }
9549 }
9550
9551 if (sec != toc)
9552 used[val >> 3] = 1;
9553 /* For the toc section, we only mark as used if this
9554 entry itself isn't unused. */
9555 else if ((used[rel->r_offset >> 3]
9556 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9557 && !used[val >> 3])
9558 {
9559 /* Do all the relocs again, to catch reference
9560 chains. */
9561 repeat = 1;
9562 used[val >> 3] = 1;
9563 }
9564 }
9565 }
9566 while (repeat);
9567
9568 if (elf_section_data (sec)->relocs != relstart)
9569 free (relstart);
9570 }
9571
9572 /* Merge the used and skip arrays. Assume that TOC
9573 doublewords not appearing as either used or unused belong
9574 to an entry more than one doubleword in size. */
9575 for (drop = skip, keep = used, last = 0, some_unused = 0;
9576 drop < skip + (toc->size + 7) / 8;
9577 ++drop, ++keep)
9578 {
9579 if (*keep)
9580 {
9581 *drop &= ~ref_from_discarded;
9582 if ((*drop & can_optimize) != 0)
9583 some_unused = 1;
9584 last = 0;
9585 }
9586 else if ((*drop & ref_from_discarded) != 0)
9587 {
9588 some_unused = 1;
9589 last = ref_from_discarded;
9590 }
9591 else
9592 *drop = last;
9593 }
9594
9595 free (used);
9596
9597 if (some_unused)
9598 {
9599 bfd_byte *contents, *src;
9600 unsigned long off;
9601 Elf_Internal_Sym *sym;
9602 bfd_boolean local_toc_syms = FALSE;
9603
9604 /* Shuffle the toc contents, and at the same time convert the
9605 skip array from booleans into offsets. */
9606 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9607 goto error_ret;
9608
9609 elf_section_data (toc)->this_hdr.contents = contents;
9610
9611 for (src = contents, off = 0, drop = skip;
9612 src < contents + toc->size;
9613 src += 8, ++drop)
9614 {
9615 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9616 off += 8;
9617 else if (off != 0)
9618 {
9619 *drop = off;
9620 memcpy (src - off, src, 8);
9621 }
9622 }
9623 *drop = off;
9624 toc->rawsize = toc->size;
9625 toc->size = src - contents - off;
9626
9627 /* Adjust addends for relocs against the toc section sym,
9628 and optimize any accesses we can. */
9629 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9630 {
9631 if (sec->reloc_count == 0
9632 || discarded_section (sec))
9633 continue;
9634
9635 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9636 info->keep_memory);
9637 if (relstart == NULL)
9638 goto error_ret;
9639
9640 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9641 {
9642 enum elf_ppc64_reloc_type r_type;
9643 unsigned long r_symndx;
9644 asection *sym_sec;
9645 struct elf_link_hash_entry *h;
9646 bfd_vma val;
9647
9648 r_type = ELF64_R_TYPE (rel->r_info);
9649 switch (r_type)
9650 {
9651 default:
9652 continue;
9653
9654 case R_PPC64_TOC16:
9655 case R_PPC64_TOC16_LO:
9656 case R_PPC64_TOC16_HI:
9657 case R_PPC64_TOC16_HA:
9658 case R_PPC64_TOC16_DS:
9659 case R_PPC64_TOC16_LO_DS:
9660 case R_PPC64_ADDR64:
9661 break;
9662 }
9663
9664 r_symndx = ELF64_R_SYM (rel->r_info);
9665 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9666 r_symndx, ibfd))
9667 goto error_ret;
9668
9669 if (sym_sec != toc)
9670 continue;
9671
9672 if (h != NULL)
9673 val = h->root.u.def.value;
9674 else
9675 {
9676 val = sym->st_value;
9677 if (val != 0)
9678 local_toc_syms = TRUE;
9679 }
9680
9681 val += rel->r_addend;
9682
9683 if (val > toc->rawsize)
9684 val = toc->rawsize;
9685 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9686 continue;
9687 else if ((skip[val >> 3] & can_optimize) != 0)
9688 {
9689 Elf_Internal_Rela *tocrel
9690 = toc_relocs + (skip[val >> 3] >> 2);
9691 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9692
9693 switch (r_type)
9694 {
9695 case R_PPC64_TOC16_HA:
9696 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9697 break;
9698
9699 case R_PPC64_TOC16_LO_DS:
9700 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9701 break;
9702
9703 default:
9704 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9705 ppc_howto_init ();
9706 info->callbacks->einfo
9707 /* xgettext:c-format */
9708 (_("%H: %s references "
9709 "optimized away TOC entry\n"),
9710 ibfd, sec, rel->r_offset,
9711 ppc64_elf_howto_table[r_type]->name);
9712 bfd_set_error (bfd_error_bad_value);
9713 goto error_ret;
9714 }
9715 rel->r_addend = tocrel->r_addend;
9716 elf_section_data (sec)->relocs = relstart;
9717 continue;
9718 }
9719
9720 if (h != NULL || sym->st_value != 0)
9721 continue;
9722
9723 rel->r_addend -= skip[val >> 3];
9724 elf_section_data (sec)->relocs = relstart;
9725 }
9726
9727 if (elf_section_data (sec)->relocs != relstart)
9728 free (relstart);
9729 }
9730
9731 /* We shouldn't have local or global symbols defined in the TOC,
9732 but handle them anyway. */
9733 if (local_syms != NULL)
9734 for (sym = local_syms;
9735 sym < local_syms + symtab_hdr->sh_info;
9736 ++sym)
9737 if (sym->st_value != 0
9738 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9739 {
9740 unsigned long i;
9741
9742 if (sym->st_value > toc->rawsize)
9743 i = toc->rawsize >> 3;
9744 else
9745 i = sym->st_value >> 3;
9746
9747 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9748 {
9749 if (local_toc_syms)
9750 _bfd_error_handler
9751 (_("%s defined on removed toc entry"),
9752 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9753 do
9754 ++i;
9755 while ((skip[i] & (ref_from_discarded | can_optimize)));
9756 sym->st_value = (bfd_vma) i << 3;
9757 }
9758
9759 sym->st_value -= skip[i];
9760 symtab_hdr->contents = (unsigned char *) local_syms;
9761 }
9762
9763 /* Adjust any global syms defined in this toc input section. */
9764 if (toc_inf.global_toc_syms)
9765 {
9766 toc_inf.toc = toc;
9767 toc_inf.skip = skip;
9768 toc_inf.global_toc_syms = FALSE;
9769 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9770 &toc_inf);
9771 }
9772
9773 if (toc->reloc_count != 0)
9774 {
9775 Elf_Internal_Shdr *rel_hdr;
9776 Elf_Internal_Rela *wrel;
9777 bfd_size_type sz;
9778
9779 /* Remove unused toc relocs, and adjust those we keep. */
9780 if (toc_relocs == NULL)
9781 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9782 info->keep_memory);
9783 if (toc_relocs == NULL)
9784 goto error_ret;
9785
9786 wrel = toc_relocs;
9787 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9788 if ((skip[rel->r_offset >> 3]
9789 & (ref_from_discarded | can_optimize)) == 0)
9790 {
9791 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9792 wrel->r_info = rel->r_info;
9793 wrel->r_addend = rel->r_addend;
9794 ++wrel;
9795 }
9796 else if (!dec_dynrel_count (rel->r_info, toc, info,
9797 &local_syms, NULL, NULL))
9798 goto error_ret;
9799
9800 elf_section_data (toc)->relocs = toc_relocs;
9801 toc->reloc_count = wrel - toc_relocs;
9802 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9803 sz = rel_hdr->sh_entsize;
9804 rel_hdr->sh_size = toc->reloc_count * sz;
9805 }
9806 }
9807 else if (toc_relocs != NULL
9808 && elf_section_data (toc)->relocs != toc_relocs)
9809 free (toc_relocs);
9810
9811 if (local_syms != NULL
9812 && symtab_hdr->contents != (unsigned char *) local_syms)
9813 {
9814 if (!info->keep_memory)
9815 free (local_syms);
9816 else
9817 symtab_hdr->contents = (unsigned char *) local_syms;
9818 }
9819 free (skip);
9820 }
9821
9822 return TRUE;
9823 }
9824
9825 /* Return true iff input section I references the TOC using
9826 instructions limited to +/-32k offsets. */
9827
9828 bfd_boolean
9829 ppc64_elf_has_small_toc_reloc (asection *i)
9830 {
9831 return (is_ppc64_elf (i->owner)
9832 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9833 }
9834
9835 /* Allocate space for one GOT entry. */
9836
9837 static void
9838 allocate_got (struct elf_link_hash_entry *h,
9839 struct bfd_link_info *info,
9840 struct got_entry *gent)
9841 {
9842 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9843 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9844 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9845 ? 16 : 8);
9846 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9847 ? 2 : 1) * sizeof (Elf64_External_Rela);
9848 asection *got = ppc64_elf_tdata (gent->owner)->got;
9849
9850 gent->got.offset = got->size;
9851 got->size += entsize;
9852
9853 if (h->type == STT_GNU_IFUNC)
9854 {
9855 htab->elf.irelplt->size += rentsize;
9856 htab->got_reli_size += rentsize;
9857 }
9858 else if (((bfd_link_pic (info)
9859 && !((gent->tls_type & TLS_TPREL) != 0
9860 && bfd_link_executable (info)
9861 && SYMBOL_REFERENCES_LOCAL (info, h)))
9862 || (htab->elf.dynamic_sections_created
9863 && h->dynindx != -1
9864 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9865 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9866 {
9867 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9868 relgot->size += rentsize;
9869 }
9870 }
9871
9872 /* This function merges got entries in the same toc group. */
9873
9874 static void
9875 merge_got_entries (struct got_entry **pent)
9876 {
9877 struct got_entry *ent, *ent2;
9878
9879 for (ent = *pent; ent != NULL; ent = ent->next)
9880 if (!ent->is_indirect)
9881 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9882 if (!ent2->is_indirect
9883 && ent2->addend == ent->addend
9884 && ent2->tls_type == ent->tls_type
9885 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9886 {
9887 ent2->is_indirect = TRUE;
9888 ent2->got.ent = ent;
9889 }
9890 }
9891
9892 /* If H is undefined, make it dynamic if that makes sense. */
9893
9894 static bfd_boolean
9895 ensure_undef_dynamic (struct bfd_link_info *info,
9896 struct elf_link_hash_entry *h)
9897 {
9898 struct elf_link_hash_table *htab = elf_hash_table (info);
9899
9900 if (htab->dynamic_sections_created
9901 && ((info->dynamic_undefined_weak != 0
9902 && h->root.type == bfd_link_hash_undefweak)
9903 || h->root.type == bfd_link_hash_undefined)
9904 && h->dynindx == -1
9905 && !h->forced_local
9906 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9907 return bfd_elf_link_record_dynamic_symbol (info, h);
9908 return TRUE;
9909 }
9910
9911 /* Allocate space in .plt, .got and associated reloc sections for
9912 dynamic relocs. */
9913
9914 static bfd_boolean
9915 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9916 {
9917 struct bfd_link_info *info;
9918 struct ppc_link_hash_table *htab;
9919 asection *s;
9920 struct ppc_link_hash_entry *eh;
9921 struct got_entry **pgent, *gent;
9922
9923 if (h->root.type == bfd_link_hash_indirect)
9924 return TRUE;
9925
9926 info = (struct bfd_link_info *) inf;
9927 htab = ppc_hash_table (info);
9928 if (htab == NULL)
9929 return FALSE;
9930
9931 eh = (struct ppc_link_hash_entry *) h;
9932 /* Run through the TLS GD got entries first if we're changing them
9933 to TPREL. */
9934 if ((eh->tls_mask & (TLS_TLS | TLS_TPRELGD)) == (TLS_TLS | TLS_TPRELGD))
9935 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9936 if (gent->got.refcount > 0
9937 && (gent->tls_type & TLS_GD) != 0)
9938 {
9939 /* This was a GD entry that has been converted to TPREL. If
9940 there happens to be a TPREL entry we can use that one. */
9941 struct got_entry *ent;
9942 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9943 if (ent->got.refcount > 0
9944 && (ent->tls_type & TLS_TPREL) != 0
9945 && ent->addend == gent->addend
9946 && ent->owner == gent->owner)
9947 {
9948 gent->got.refcount = 0;
9949 break;
9950 }
9951
9952 /* If not, then we'll be using our own TPREL entry. */
9953 if (gent->got.refcount != 0)
9954 gent->tls_type = TLS_TLS | TLS_TPREL;
9955 }
9956
9957 /* Remove any list entry that won't generate a word in the GOT before
9958 we call merge_got_entries. Otherwise we risk merging to empty
9959 entries. */
9960 pgent = &h->got.glist;
9961 while ((gent = *pgent) != NULL)
9962 if (gent->got.refcount > 0)
9963 {
9964 if ((gent->tls_type & TLS_LD) != 0
9965 && !h->def_dynamic)
9966 {
9967 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9968 *pgent = gent->next;
9969 }
9970 else
9971 pgent = &gent->next;
9972 }
9973 else
9974 *pgent = gent->next;
9975
9976 if (!htab->do_multi_toc)
9977 merge_got_entries (&h->got.glist);
9978
9979 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9980 if (!gent->is_indirect)
9981 {
9982 /* Make sure this symbol is output as a dynamic symbol. */
9983 if (!ensure_undef_dynamic (info, h))
9984 return FALSE;
9985
9986 if (!is_ppc64_elf (gent->owner))
9987 abort ();
9988
9989 allocate_got (h, info, gent);
9990 }
9991
9992 /* If no dynamic sections we can't have dynamic relocs, except for
9993 IFUNCs which are handled even in static executables. */
9994 if (!htab->elf.dynamic_sections_created
9995 && h->type != STT_GNU_IFUNC)
9996 eh->dyn_relocs = NULL;
9997
9998 /* Discard relocs on undefined symbols that must be local. */
9999 else if (h->root.type == bfd_link_hash_undefined
10000 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
10001 eh->dyn_relocs = NULL;
10002
10003 /* Also discard relocs on undefined weak syms with non-default
10004 visibility, or when dynamic_undefined_weak says so. */
10005 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
10006 eh->dyn_relocs = NULL;
10007
10008 if (eh->dyn_relocs != NULL)
10009 {
10010 struct elf_dyn_relocs *p, **pp;
10011
10012 /* In the shared -Bsymbolic case, discard space allocated for
10013 dynamic pc-relative relocs against symbols which turn out to
10014 be defined in regular objects. For the normal shared case,
10015 discard space for relocs that have become local due to symbol
10016 visibility changes. */
10017
10018 if (bfd_link_pic (info))
10019 {
10020 /* Relocs that use pc_count are those that appear on a call
10021 insn, or certain REL relocs (see must_be_dyn_reloc) that
10022 can be generated via assembly. We want calls to
10023 protected symbols to resolve directly to the function
10024 rather than going via the plt. If people want function
10025 pointer comparisons to work as expected then they should
10026 avoid writing weird assembly. */
10027 if (SYMBOL_CALLS_LOCAL (info, h))
10028 {
10029 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
10030 {
10031 p->count -= p->pc_count;
10032 p->pc_count = 0;
10033 if (p->count == 0)
10034 *pp = p->next;
10035 else
10036 pp = &p->next;
10037 }
10038 }
10039
10040 if (eh->dyn_relocs != NULL)
10041 {
10042 /* Make sure this symbol is output as a dynamic symbol. */
10043 if (!ensure_undef_dynamic (info, h))
10044 return FALSE;
10045 }
10046 }
10047 else if (ELIMINATE_COPY_RELOCS && h->type != STT_GNU_IFUNC)
10048 {
10049 /* For the non-pic case, discard space for relocs against
10050 symbols which turn out to need copy relocs or are not
10051 dynamic. */
10052 if (h->dynamic_adjusted
10053 && !h->def_regular
10054 && !ELF_COMMON_DEF_P (h))
10055 {
10056 /* Make sure this symbol is output as a dynamic symbol. */
10057 if (!ensure_undef_dynamic (info, h))
10058 return FALSE;
10059
10060 if (h->dynindx == -1)
10061 eh->dyn_relocs = NULL;
10062 }
10063 else
10064 eh->dyn_relocs = NULL;
10065 }
10066
10067 /* Finally, allocate space. */
10068 for (p = eh->dyn_relocs; p != NULL; p = p->next)
10069 {
10070 asection *sreloc = elf_section_data (p->sec)->sreloc;
10071 if (eh->elf.type == STT_GNU_IFUNC)
10072 sreloc = htab->elf.irelplt;
10073 sreloc->size += p->count * sizeof (Elf64_External_Rela);
10074 }
10075 }
10076
10077 /* We might need a PLT entry when the symbol
10078 a) is dynamic, or
10079 b) is an ifunc, or
10080 c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or
10081 d) has plt16 relocs and we are linking statically. */
10082 if ((htab->elf.dynamic_sections_created && h->dynindx != -1)
10083 || h->type == STT_GNU_IFUNC
10084 || (h->needs_plt && h->dynamic_adjusted)
10085 || (h->needs_plt
10086 && h->def_regular
10087 && !htab->elf.dynamic_sections_created
10088 && !htab->can_convert_all_inline_plt
10089 && (((struct ppc_link_hash_entry *) h)->tls_mask
10090 & (TLS_TLS | PLT_KEEP)) == PLT_KEEP))
10091 {
10092 struct plt_entry *pent;
10093 bfd_boolean doneone = FALSE;
10094 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10095 if (pent->plt.refcount > 0)
10096 {
10097 if (!htab->elf.dynamic_sections_created
10098 || h->dynindx == -1)
10099 {
10100 if (h->type == STT_GNU_IFUNC)
10101 {
10102 s = htab->elf.iplt;
10103 pent->plt.offset = s->size;
10104 s->size += PLT_ENTRY_SIZE (htab);
10105 s = htab->elf.irelplt;
10106 }
10107 else
10108 {
10109 s = htab->pltlocal;
10110 pent->plt.offset = s->size;
10111 s->size += LOCAL_PLT_ENTRY_SIZE (htab);
10112 s = bfd_link_pic (info) ? htab->relpltlocal : NULL;
10113 }
10114 }
10115 else
10116 {
10117 /* If this is the first .plt entry, make room for the special
10118 first entry. */
10119 s = htab->elf.splt;
10120 if (s->size == 0)
10121 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
10122
10123 pent->plt.offset = s->size;
10124
10125 /* Make room for this entry. */
10126 s->size += PLT_ENTRY_SIZE (htab);
10127
10128 /* Make room for the .glink code. */
10129 s = htab->glink;
10130 if (s->size == 0)
10131 s->size += GLINK_PLTRESOLVE_SIZE (htab);
10132 if (htab->opd_abi)
10133 {
10134 /* We need bigger stubs past index 32767. */
10135 if (s->size >= GLINK_PLTRESOLVE_SIZE (htab) + 32768*2*4)
10136 s->size += 4;
10137 s->size += 2*4;
10138 }
10139 else
10140 s->size += 4;
10141
10142 /* We also need to make an entry in the .rela.plt section. */
10143 s = htab->elf.srelplt;
10144 }
10145 if (s != NULL)
10146 s->size += sizeof (Elf64_External_Rela);
10147 doneone = TRUE;
10148 }
10149 else
10150 pent->plt.offset = (bfd_vma) -1;
10151 if (!doneone)
10152 {
10153 h->plt.plist = NULL;
10154 h->needs_plt = 0;
10155 }
10156 }
10157 else
10158 {
10159 h->plt.plist = NULL;
10160 h->needs_plt = 0;
10161 }
10162
10163 return TRUE;
10164 }
10165
10166 #define PPC_LO(v) ((v) & 0xffff)
10167 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10168 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10169
10170 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
10171 to set up space for global entry stubs. These are put in glink,
10172 after the branch table. */
10173
10174 static bfd_boolean
10175 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
10176 {
10177 struct bfd_link_info *info;
10178 struct ppc_link_hash_table *htab;
10179 struct plt_entry *pent;
10180 asection *s, *plt;
10181
10182 if (h->root.type == bfd_link_hash_indirect)
10183 return TRUE;
10184
10185 if (!h->pointer_equality_needed)
10186 return TRUE;
10187
10188 if (h->def_regular)
10189 return TRUE;
10190
10191 info = inf;
10192 htab = ppc_hash_table (info);
10193 if (htab == NULL)
10194 return FALSE;
10195
10196 s = htab->global_entry;
10197 plt = htab->elf.splt;
10198 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10199 if (pent->plt.offset != (bfd_vma) -1
10200 && pent->addend == 0)
10201 {
10202 /* For ELFv2, if this symbol is not defined in a regular file
10203 and we are not generating a shared library or pie, then we
10204 need to define the symbol in the executable on a call stub.
10205 This is to avoid text relocations. */
10206 bfd_vma off, stub_align, stub_off, stub_size;
10207 unsigned int align_power;
10208
10209 stub_size = 16;
10210 stub_off = s->size;
10211 if (htab->params->plt_stub_align >= 0)
10212 align_power = htab->params->plt_stub_align;
10213 else
10214 align_power = -htab->params->plt_stub_align;
10215 /* Setting section alignment is delayed until we know it is
10216 non-empty. Otherwise the .text output section will be
10217 aligned at least to plt_stub_align even when no global
10218 entry stubs are needed. */
10219 if (s->alignment_power < align_power)
10220 s->alignment_power = align_power;
10221 stub_align = (bfd_vma) 1 << align_power;
10222 if (htab->params->plt_stub_align >= 0
10223 || ((((stub_off + stub_size - 1) & -stub_align)
10224 - (stub_off & -stub_align))
10225 > ((stub_size - 1) & -stub_align)))
10226 stub_off = (stub_off + stub_align - 1) & -stub_align;
10227 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
10228 off -= stub_off + s->output_offset + s->output_section->vma;
10229 /* Note that for --plt-stub-align negative we have a possible
10230 dependency between stub offset and size. Break that
10231 dependency by assuming the max stub size when calculating
10232 the stub offset. */
10233 if (PPC_HA (off) == 0)
10234 stub_size -= 4;
10235 h->root.type = bfd_link_hash_defined;
10236 h->root.u.def.section = s;
10237 h->root.u.def.value = stub_off;
10238 s->size = stub_off + stub_size;
10239 break;
10240 }
10241 return TRUE;
10242 }
10243
10244 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
10245 read-only sections. */
10246
10247 static bfd_boolean
10248 maybe_set_textrel (struct elf_link_hash_entry *h, void *inf)
10249 {
10250 asection *sec;
10251
10252 if (h->root.type == bfd_link_hash_indirect)
10253 return TRUE;
10254
10255 sec = readonly_dynrelocs (h);
10256 if (sec != NULL)
10257 {
10258 struct bfd_link_info *info = (struct bfd_link_info *) inf;
10259
10260 info->flags |= DF_TEXTREL;
10261 info->callbacks->minfo
10262 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
10263 sec->owner, h->root.root.string, sec);
10264
10265 /* Not an error, just cut short the traversal. */
10266 return FALSE;
10267 }
10268 return TRUE;
10269 }
10270
10271 /* Set the sizes of the dynamic sections. */
10272
10273 static bfd_boolean
10274 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10275 struct bfd_link_info *info)
10276 {
10277 struct ppc_link_hash_table *htab;
10278 bfd *dynobj;
10279 asection *s;
10280 bfd_boolean relocs;
10281 bfd *ibfd;
10282 struct got_entry *first_tlsld;
10283
10284 htab = ppc_hash_table (info);
10285 if (htab == NULL)
10286 return FALSE;
10287
10288 dynobj = htab->elf.dynobj;
10289 if (dynobj == NULL)
10290 abort ();
10291
10292 if (htab->elf.dynamic_sections_created)
10293 {
10294 /* Set the contents of the .interp section to the interpreter. */
10295 if (bfd_link_executable (info) && !info->nointerp)
10296 {
10297 s = bfd_get_linker_section (dynobj, ".interp");
10298 if (s == NULL)
10299 abort ();
10300 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10301 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10302 }
10303 }
10304
10305 /* Set up .got offsets for local syms, and space for local dynamic
10306 relocs. */
10307 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10308 {
10309 struct got_entry **lgot_ents;
10310 struct got_entry **end_lgot_ents;
10311 struct plt_entry **local_plt;
10312 struct plt_entry **end_local_plt;
10313 unsigned char *lgot_masks;
10314 bfd_size_type locsymcount;
10315 Elf_Internal_Shdr *symtab_hdr;
10316
10317 if (!is_ppc64_elf (ibfd))
10318 continue;
10319
10320 for (s = ibfd->sections; s != NULL; s = s->next)
10321 {
10322 struct ppc_dyn_relocs *p;
10323
10324 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10325 {
10326 if (!bfd_is_abs_section (p->sec)
10327 && bfd_is_abs_section (p->sec->output_section))
10328 {
10329 /* Input section has been discarded, either because
10330 it is a copy of a linkonce section or due to
10331 linker script /DISCARD/, so we'll be discarding
10332 the relocs too. */
10333 }
10334 else if (p->count != 0)
10335 {
10336 asection *srel = elf_section_data (p->sec)->sreloc;
10337 if (p->ifunc)
10338 srel = htab->elf.irelplt;
10339 srel->size += p->count * sizeof (Elf64_External_Rela);
10340 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10341 info->flags |= DF_TEXTREL;
10342 }
10343 }
10344 }
10345
10346 lgot_ents = elf_local_got_ents (ibfd);
10347 if (!lgot_ents)
10348 continue;
10349
10350 symtab_hdr = &elf_symtab_hdr (ibfd);
10351 locsymcount = symtab_hdr->sh_info;
10352 end_lgot_ents = lgot_ents + locsymcount;
10353 local_plt = (struct plt_entry **) end_lgot_ents;
10354 end_local_plt = local_plt + locsymcount;
10355 lgot_masks = (unsigned char *) end_local_plt;
10356 s = ppc64_elf_tdata (ibfd)->got;
10357 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10358 {
10359 struct got_entry **pent, *ent;
10360
10361 pent = lgot_ents;
10362 while ((ent = *pent) != NULL)
10363 if (ent->got.refcount > 0)
10364 {
10365 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10366 {
10367 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10368 *pent = ent->next;
10369 }
10370 else
10371 {
10372 unsigned int ent_size = 8;
10373 unsigned int rel_size = sizeof (Elf64_External_Rela);
10374
10375 ent->got.offset = s->size;
10376 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10377 {
10378 ent_size *= 2;
10379 rel_size *= 2;
10380 }
10381 s->size += ent_size;
10382 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
10383 {
10384 htab->elf.irelplt->size += rel_size;
10385 htab->got_reli_size += rel_size;
10386 }
10387 else if (bfd_link_pic (info)
10388 && !((ent->tls_type & TLS_TPREL) != 0
10389 && bfd_link_executable (info)))
10390 {
10391 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10392 srel->size += rel_size;
10393 }
10394 pent = &ent->next;
10395 }
10396 }
10397 else
10398 *pent = ent->next;
10399 }
10400
10401 /* Allocate space for plt calls to local syms. */
10402 lgot_masks = (unsigned char *) end_local_plt;
10403 for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks)
10404 {
10405 struct plt_entry *ent;
10406
10407 for (ent = *local_plt; ent != NULL; ent = ent->next)
10408 if (ent->plt.refcount > 0)
10409 {
10410 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
10411 {
10412 s = htab->elf.iplt;
10413 ent->plt.offset = s->size;
10414 s->size += PLT_ENTRY_SIZE (htab);
10415 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10416 }
10417 else if (htab->can_convert_all_inline_plt
10418 || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)
10419 ent->plt.offset = (bfd_vma) -1;
10420 else
10421 {
10422 s = htab->pltlocal;
10423 ent->plt.offset = s->size;
10424 s->size += LOCAL_PLT_ENTRY_SIZE (htab);
10425 if (bfd_link_pic (info))
10426 htab->relpltlocal->size += sizeof (Elf64_External_Rela);
10427 }
10428 }
10429 else
10430 ent->plt.offset = (bfd_vma) -1;
10431 }
10432 }
10433
10434 /* Allocate global sym .plt and .got entries, and space for global
10435 sym dynamic relocs. */
10436 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10437
10438 if (!htab->opd_abi && !bfd_link_pic (info))
10439 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10440
10441 first_tlsld = NULL;
10442 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10443 {
10444 struct got_entry *ent;
10445
10446 if (!is_ppc64_elf (ibfd))
10447 continue;
10448
10449 ent = ppc64_tlsld_got (ibfd);
10450 if (ent->got.refcount > 0)
10451 {
10452 if (!htab->do_multi_toc && first_tlsld != NULL)
10453 {
10454 ent->is_indirect = TRUE;
10455 ent->got.ent = first_tlsld;
10456 }
10457 else
10458 {
10459 if (first_tlsld == NULL)
10460 first_tlsld = ent;
10461 s = ppc64_elf_tdata (ibfd)->got;
10462 ent->got.offset = s->size;
10463 ent->owner = ibfd;
10464 s->size += 16;
10465 if (bfd_link_pic (info))
10466 {
10467 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10468 srel->size += sizeof (Elf64_External_Rela);
10469 }
10470 }
10471 }
10472 else
10473 ent->got.offset = (bfd_vma) -1;
10474 }
10475
10476 /* We now have determined the sizes of the various dynamic sections.
10477 Allocate memory for them. */
10478 relocs = FALSE;
10479 for (s = dynobj->sections; s != NULL; s = s->next)
10480 {
10481 if ((s->flags & SEC_LINKER_CREATED) == 0)
10482 continue;
10483
10484 if (s == htab->brlt || s == htab->relbrlt)
10485 /* These haven't been allocated yet; don't strip. */
10486 continue;
10487 else if (s == htab->elf.sgot
10488 || s == htab->elf.splt
10489 || s == htab->elf.iplt
10490 || s == htab->pltlocal
10491 || s == htab->glink
10492 || s == htab->global_entry
10493 || s == htab->elf.sdynbss
10494 || s == htab->elf.sdynrelro)
10495 {
10496 /* Strip this section if we don't need it; see the
10497 comment below. */
10498 }
10499 else if (s == htab->glink_eh_frame)
10500 {
10501 if (!bfd_is_abs_section (s->output_section))
10502 /* Not sized yet. */
10503 continue;
10504 }
10505 else if (CONST_STRNEQ (s->name, ".rela"))
10506 {
10507 if (s->size != 0)
10508 {
10509 if (s != htab->elf.srelplt)
10510 relocs = TRUE;
10511
10512 /* We use the reloc_count field as a counter if we need
10513 to copy relocs into the output file. */
10514 s->reloc_count = 0;
10515 }
10516 }
10517 else
10518 {
10519 /* It's not one of our sections, so don't allocate space. */
10520 continue;
10521 }
10522
10523 if (s->size == 0)
10524 {
10525 /* If we don't need this section, strip it from the
10526 output file. This is mostly to handle .rela.bss and
10527 .rela.plt. We must create both sections in
10528 create_dynamic_sections, because they must be created
10529 before the linker maps input sections to output
10530 sections. The linker does that before
10531 adjust_dynamic_symbol is called, and it is that
10532 function which decides whether anything needs to go
10533 into these sections. */
10534 s->flags |= SEC_EXCLUDE;
10535 continue;
10536 }
10537
10538 if (bfd_is_abs_section (s->output_section))
10539 _bfd_error_handler (_("warning: discarding dynamic section %s"),
10540 s->name);
10541
10542 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10543 continue;
10544
10545 /* Allocate memory for the section contents. We use bfd_zalloc
10546 here in case unused entries are not reclaimed before the
10547 section's contents are written out. This should not happen,
10548 but this way if it does we get a R_PPC64_NONE reloc in .rela
10549 sections instead of garbage.
10550 We also rely on the section contents being zero when writing
10551 the GOT and .dynrelro. */
10552 s->contents = bfd_zalloc (dynobj, s->size);
10553 if (s->contents == NULL)
10554 return FALSE;
10555 }
10556
10557 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10558 {
10559 if (!is_ppc64_elf (ibfd))
10560 continue;
10561
10562 s = ppc64_elf_tdata (ibfd)->got;
10563 if (s != NULL && s != htab->elf.sgot)
10564 {
10565 if (s->size == 0)
10566 s->flags |= SEC_EXCLUDE;
10567 else
10568 {
10569 s->contents = bfd_zalloc (ibfd, s->size);
10570 if (s->contents == NULL)
10571 return FALSE;
10572 }
10573 }
10574 s = ppc64_elf_tdata (ibfd)->relgot;
10575 if (s != NULL)
10576 {
10577 if (s->size == 0)
10578 s->flags |= SEC_EXCLUDE;
10579 else
10580 {
10581 s->contents = bfd_zalloc (ibfd, s->size);
10582 if (s->contents == NULL)
10583 return FALSE;
10584 relocs = TRUE;
10585 s->reloc_count = 0;
10586 }
10587 }
10588 }
10589
10590 if (htab->elf.dynamic_sections_created)
10591 {
10592 bfd_boolean tls_opt;
10593
10594 /* Add some entries to the .dynamic section. We fill in the
10595 values later, in ppc64_elf_finish_dynamic_sections, but we
10596 must add the entries now so that we get the correct size for
10597 the .dynamic section. The DT_DEBUG entry is filled in by the
10598 dynamic linker and used by the debugger. */
10599 #define add_dynamic_entry(TAG, VAL) \
10600 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10601
10602 if (bfd_link_executable (info))
10603 {
10604 if (!add_dynamic_entry (DT_DEBUG, 0))
10605 return FALSE;
10606 }
10607
10608 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10609 {
10610 if (!add_dynamic_entry (DT_PLTGOT, 0)
10611 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10612 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10613 || !add_dynamic_entry (DT_JMPREL, 0)
10614 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10615 return FALSE;
10616 }
10617
10618 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10619 {
10620 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10621 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10622 return FALSE;
10623 }
10624
10625 tls_opt = (htab->params->tls_get_addr_opt
10626 && htab->tls_get_addr_fd != NULL
10627 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10628 if (tls_opt || !htab->opd_abi)
10629 {
10630 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10631 return FALSE;
10632 }
10633
10634 if (relocs)
10635 {
10636 if (!add_dynamic_entry (DT_RELA, 0)
10637 || !add_dynamic_entry (DT_RELASZ, 0)
10638 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10639 return FALSE;
10640
10641 /* If any dynamic relocs apply to a read-only section,
10642 then we need a DT_TEXTREL entry. */
10643 if ((info->flags & DF_TEXTREL) == 0)
10644 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10645
10646 if ((info->flags & DF_TEXTREL) != 0)
10647 {
10648 if (!add_dynamic_entry (DT_TEXTREL, 0))
10649 return FALSE;
10650 }
10651 }
10652 }
10653 #undef add_dynamic_entry
10654
10655 return TRUE;
10656 }
10657
10658 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10659
10660 static bfd_boolean
10661 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10662 {
10663 if (h->plt.plist != NULL
10664 && !h->def_regular
10665 && !h->pointer_equality_needed)
10666 return FALSE;
10667
10668 return _bfd_elf_hash_symbol (h);
10669 }
10670
10671 /* Determine the type of stub needed, if any, for a call. */
10672
10673 static inline enum ppc_stub_type
10674 ppc_type_of_stub (asection *input_sec,
10675 const Elf_Internal_Rela *rel,
10676 struct ppc_link_hash_entry **hash,
10677 struct plt_entry **plt_ent,
10678 bfd_vma destination,
10679 unsigned long local_off)
10680 {
10681 struct ppc_link_hash_entry *h = *hash;
10682 bfd_vma location;
10683 bfd_vma branch_offset;
10684 bfd_vma max_branch_offset;
10685 enum elf_ppc64_reloc_type r_type;
10686
10687 if (h != NULL)
10688 {
10689 struct plt_entry *ent;
10690 struct ppc_link_hash_entry *fdh = h;
10691 if (h->oh != NULL
10692 && h->oh->is_func_descriptor)
10693 {
10694 fdh = ppc_follow_link (h->oh);
10695 *hash = fdh;
10696 }
10697
10698 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10699 if (ent->addend == rel->r_addend
10700 && ent->plt.offset != (bfd_vma) -1)
10701 {
10702 *plt_ent = ent;
10703 return ppc_stub_plt_call;
10704 }
10705
10706 /* Here, we know we don't have a plt entry. If we don't have a
10707 either a defined function descriptor or a defined entry symbol
10708 in a regular object file, then it is pointless trying to make
10709 any other type of stub. */
10710 if (!is_static_defined (&fdh->elf)
10711 && !is_static_defined (&h->elf))
10712 return ppc_stub_none;
10713 }
10714 else if (elf_local_got_ents (input_sec->owner) != NULL)
10715 {
10716 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10717 struct plt_entry **local_plt = (struct plt_entry **)
10718 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10719 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10720
10721 if (local_plt[r_symndx] != NULL)
10722 {
10723 struct plt_entry *ent;
10724
10725 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10726 if (ent->addend == rel->r_addend
10727 && ent->plt.offset != (bfd_vma) -1)
10728 {
10729 *plt_ent = ent;
10730 return ppc_stub_plt_call;
10731 }
10732 }
10733 }
10734
10735 /* Determine where the call point is. */
10736 location = (input_sec->output_offset
10737 + input_sec->output_section->vma
10738 + rel->r_offset);
10739
10740 branch_offset = destination - location;
10741 r_type = ELF64_R_TYPE (rel->r_info);
10742
10743 /* Determine if a long branch stub is needed. */
10744 max_branch_offset = 1 << 25;
10745 if (r_type == R_PPC64_REL14
10746 || r_type == R_PPC64_REL14_BRTAKEN
10747 || r_type == R_PPC64_REL14_BRNTAKEN)
10748 max_branch_offset = 1 << 15;
10749
10750 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10751 /* We need a stub. Figure out whether a long_branch or plt_branch
10752 is needed later. */
10753 return ppc_stub_long_branch;
10754
10755 return ppc_stub_none;
10756 }
10757
10758 /* With power7 weakly ordered memory model, it is possible for ld.so
10759 to update a plt entry in one thread and have another thread see a
10760 stale zero toc entry. To avoid this we need some sort of acquire
10761 barrier in the call stub. One solution is to make the load of the
10762 toc word seem to appear to depend on the load of the function entry
10763 word. Another solution is to test for r2 being zero, and branch to
10764 the appropriate glink entry if so.
10765
10766 . fake dep barrier compare
10767 . ld 12,xxx(2) ld 12,xxx(2)
10768 . mtctr 12 mtctr 12
10769 . xor 11,12,12 ld 2,xxx+8(2)
10770 . add 2,2,11 cmpldi 2,0
10771 . ld 2,xxx+8(2) bnectr+
10772 . bctr b <glink_entry>
10773
10774 The solution involving the compare turns out to be faster, so
10775 that's what we use unless the branch won't reach. */
10776
10777 #define ALWAYS_USE_FAKE_DEP 0
10778 #define ALWAYS_EMIT_R2SAVE 0
10779
10780 static inline unsigned int
10781 plt_stub_size (struct ppc_link_hash_table *htab,
10782 struct ppc_stub_hash_entry *stub_entry,
10783 bfd_vma off)
10784 {
10785 unsigned size = 12;
10786
10787 if (ALWAYS_EMIT_R2SAVE
10788 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10789 size += 4;
10790 if (PPC_HA (off) != 0)
10791 size += 4;
10792 if (htab->opd_abi)
10793 {
10794 size += 4;
10795 if (htab->params->plt_static_chain)
10796 size += 4;
10797 if (htab->params->plt_thread_safe
10798 && htab->elf.dynamic_sections_created
10799 && stub_entry->h != NULL
10800 && stub_entry->h->elf.dynindx != -1)
10801 size += 8;
10802 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10803 size += 4;
10804 }
10805 if (stub_entry->h != NULL
10806 && (stub_entry->h == htab->tls_get_addr_fd
10807 || stub_entry->h == htab->tls_get_addr)
10808 && htab->params->tls_get_addr_opt)
10809 {
10810 size += 7 * 4;
10811 if (ALWAYS_EMIT_R2SAVE
10812 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10813 size += 6 * 4;
10814 }
10815 return size;
10816 }
10817
10818 /* Depending on the sign of plt_stub_align:
10819 If positive, return the padding to align to a 2**plt_stub_align
10820 boundary.
10821 If negative, if this stub would cross fewer 2**plt_stub_align
10822 boundaries if we align, then return the padding needed to do so. */
10823
10824 static inline unsigned int
10825 plt_stub_pad (struct ppc_link_hash_table *htab,
10826 struct ppc_stub_hash_entry *stub_entry,
10827 bfd_vma plt_off)
10828 {
10829 int stub_align;
10830 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10831 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10832
10833 if (htab->params->plt_stub_align >= 0)
10834 {
10835 stub_align = 1 << htab->params->plt_stub_align;
10836 if ((stub_off & (stub_align - 1)) != 0)
10837 return stub_align - (stub_off & (stub_align - 1));
10838 return 0;
10839 }
10840
10841 stub_align = 1 << -htab->params->plt_stub_align;
10842 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10843 > ((stub_size - 1) & -stub_align))
10844 return stub_align - (stub_off & (stub_align - 1));
10845 return 0;
10846 }
10847
10848 /* Build a .plt call stub. */
10849
10850 static inline bfd_byte *
10851 build_plt_stub (struct ppc_link_hash_table *htab,
10852 struct ppc_stub_hash_entry *stub_entry,
10853 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10854 {
10855 bfd *obfd = htab->params->stub_bfd;
10856 bfd_boolean plt_load_toc = htab->opd_abi;
10857 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10858 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10859 && htab->elf.dynamic_sections_created
10860 && stub_entry->h != NULL
10861 && stub_entry->h->elf.dynindx != -1);
10862 bfd_boolean use_fake_dep = plt_thread_safe;
10863 bfd_vma cmp_branch_off = 0;
10864
10865 if (!ALWAYS_USE_FAKE_DEP
10866 && plt_load_toc
10867 && plt_thread_safe
10868 && !((stub_entry->h == htab->tls_get_addr_fd
10869 || stub_entry->h == htab->tls_get_addr)
10870 && htab->params->tls_get_addr_opt))
10871 {
10872 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10873 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10874 / PLT_ENTRY_SIZE (htab));
10875 bfd_vma glinkoff = GLINK_PLTRESOLVE_SIZE (htab) + pltindex * 8;
10876 bfd_vma to, from;
10877
10878 if (pltindex > 32768)
10879 glinkoff += (pltindex - 32768) * 4;
10880 to = (glinkoff
10881 + htab->glink->output_offset
10882 + htab->glink->output_section->vma);
10883 from = (p - stub_entry->group->stub_sec->contents
10884 + 4 * (ALWAYS_EMIT_R2SAVE
10885 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10886 + 4 * (PPC_HA (offset) != 0)
10887 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10888 != PPC_HA (offset))
10889 + 4 * (plt_static_chain != 0)
10890 + 20
10891 + stub_entry->group->stub_sec->output_offset
10892 + stub_entry->group->stub_sec->output_section->vma);
10893 cmp_branch_off = to - from;
10894 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10895 }
10896
10897 if (PPC_HA (offset) != 0)
10898 {
10899 if (r != NULL)
10900 {
10901 if (ALWAYS_EMIT_R2SAVE
10902 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10903 r[0].r_offset += 4;
10904 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10905 r[1].r_offset = r[0].r_offset + 4;
10906 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10907 r[1].r_addend = r[0].r_addend;
10908 if (plt_load_toc)
10909 {
10910 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10911 {
10912 r[2].r_offset = r[1].r_offset + 4;
10913 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10914 r[2].r_addend = r[0].r_addend;
10915 }
10916 else
10917 {
10918 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10919 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10920 r[2].r_addend = r[0].r_addend + 8;
10921 if (plt_static_chain)
10922 {
10923 r[3].r_offset = r[2].r_offset + 4;
10924 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10925 r[3].r_addend = r[0].r_addend + 16;
10926 }
10927 }
10928 }
10929 }
10930 if (ALWAYS_EMIT_R2SAVE
10931 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10932 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10933 if (plt_load_toc)
10934 {
10935 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10936 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10937 }
10938 else
10939 {
10940 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10941 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10942 }
10943 if (plt_load_toc
10944 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10945 {
10946 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10947 offset = 0;
10948 }
10949 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10950 if (plt_load_toc)
10951 {
10952 if (use_fake_dep)
10953 {
10954 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10955 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10956 }
10957 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10958 if (plt_static_chain)
10959 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10960 }
10961 }
10962 else
10963 {
10964 if (r != NULL)
10965 {
10966 if (ALWAYS_EMIT_R2SAVE
10967 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10968 r[0].r_offset += 4;
10969 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10970 if (plt_load_toc)
10971 {
10972 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10973 {
10974 r[1].r_offset = r[0].r_offset + 4;
10975 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10976 r[1].r_addend = r[0].r_addend;
10977 }
10978 else
10979 {
10980 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10981 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10982 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10983 if (plt_static_chain)
10984 {
10985 r[2].r_offset = r[1].r_offset + 4;
10986 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10987 r[2].r_addend = r[0].r_addend + 8;
10988 }
10989 }
10990 }
10991 }
10992 if (ALWAYS_EMIT_R2SAVE
10993 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10994 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10995 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10996 if (plt_load_toc
10997 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10998 {
10999 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
11000 offset = 0;
11001 }
11002 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
11003 if (plt_load_toc)
11004 {
11005 if (use_fake_dep)
11006 {
11007 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
11008 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
11009 }
11010 if (plt_static_chain)
11011 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
11012 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
11013 }
11014 }
11015 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
11016 {
11017 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
11018 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
11019 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
11020 }
11021 else
11022 bfd_put_32 (obfd, BCTR, p), p += 4;
11023 return p;
11024 }
11025
11026 /* Build a special .plt call stub for __tls_get_addr. */
11027
11028 #define LD_R11_0R3 0xe9630000
11029 #define LD_R12_0R3 0xe9830000
11030 #define MR_R0_R3 0x7c601b78
11031 #define CMPDI_R11_0 0x2c2b0000
11032 #define ADD_R3_R12_R13 0x7c6c6a14
11033 #define BEQLR 0x4d820020
11034 #define MR_R3_R0 0x7c030378
11035 #define STD_R11_0R1 0xf9610000
11036 #define BCTRL 0x4e800421
11037 #define LD_R11_0R1 0xe9610000
11038 #define MTLR_R11 0x7d6803a6
11039
11040 static inline bfd_byte *
11041 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
11042 struct ppc_stub_hash_entry *stub_entry,
11043 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
11044 {
11045 bfd *obfd = htab->params->stub_bfd;
11046
11047 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
11048 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
11049 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
11050 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
11051 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
11052 bfd_put_32 (obfd, BEQLR, p), p += 4;
11053 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
11054 if (r != NULL)
11055 r[0].r_offset += 7 * 4;
11056 if (!ALWAYS_EMIT_R2SAVE
11057 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
11058 return build_plt_stub (htab, stub_entry, p, offset, r);
11059
11060 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
11061 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
11062
11063 if (r != NULL)
11064 r[0].r_offset += 2 * 4;
11065 p = build_plt_stub (htab, stub_entry, p, offset, r);
11066 bfd_put_32 (obfd, BCTRL, p - 4);
11067
11068 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
11069 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
11070 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
11071 bfd_put_32 (obfd, BLR, p), p += 4;
11072
11073 return p;
11074 }
11075
11076 static Elf_Internal_Rela *
11077 get_relocs (asection *sec, int count)
11078 {
11079 Elf_Internal_Rela *relocs;
11080 struct bfd_elf_section_data *elfsec_data;
11081
11082 elfsec_data = elf_section_data (sec);
11083 relocs = elfsec_data->relocs;
11084 if (relocs == NULL)
11085 {
11086 bfd_size_type relsize;
11087 relsize = sec->reloc_count * sizeof (*relocs);
11088 relocs = bfd_alloc (sec->owner, relsize);
11089 if (relocs == NULL)
11090 return NULL;
11091 elfsec_data->relocs = relocs;
11092 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
11093 sizeof (Elf_Internal_Shdr));
11094 if (elfsec_data->rela.hdr == NULL)
11095 return NULL;
11096 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
11097 * sizeof (Elf64_External_Rela));
11098 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
11099 sec->reloc_count = 0;
11100 }
11101 relocs += sec->reloc_count;
11102 sec->reloc_count += count;
11103 return relocs;
11104 }
11105
11106 static bfd_vma
11107 get_r2off (struct bfd_link_info *info,
11108 struct ppc_stub_hash_entry *stub_entry)
11109 {
11110 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11111 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
11112
11113 if (r2off == 0)
11114 {
11115 /* Support linking -R objects. Get the toc pointer from the
11116 opd entry. */
11117 char buf[8];
11118 if (!htab->opd_abi)
11119 return r2off;
11120 asection *opd = stub_entry->h->elf.root.u.def.section;
11121 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
11122
11123 if (strcmp (opd->name, ".opd") != 0
11124 || opd->reloc_count != 0)
11125 {
11126 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%pT'\n"),
11127 stub_entry->h->elf.root.root.string);
11128 bfd_set_error (bfd_error_bad_value);
11129 return (bfd_vma) -1;
11130 }
11131 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
11132 return (bfd_vma) -1;
11133 r2off = bfd_get_64 (opd->owner, buf);
11134 r2off -= elf_gp (info->output_bfd);
11135 }
11136 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
11137 return r2off;
11138 }
11139
11140 static bfd_boolean
11141 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11142 {
11143 struct ppc_stub_hash_entry *stub_entry;
11144 struct ppc_branch_hash_entry *br_entry;
11145 struct bfd_link_info *info;
11146 struct ppc_link_hash_table *htab;
11147 bfd_byte *loc;
11148 bfd_byte *p;
11149 bfd_vma dest, off;
11150 Elf_Internal_Rela *r;
11151 asection *plt;
11152
11153 /* Massage our args to the form they really have. */
11154 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11155 info = in_arg;
11156
11157 htab = ppc_hash_table (info);
11158 if (htab == NULL)
11159 return FALSE;
11160
11161 /* Make a note of the offset within the stubs for this entry. */
11162 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11163 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
11164
11165 htab->stub_count[stub_entry->stub_type - 1] += 1;
11166 switch (stub_entry->stub_type)
11167 {
11168 case ppc_stub_long_branch:
11169 case ppc_stub_long_branch_r2off:
11170 /* Branches are relative. This is where we are going to. */
11171 dest = (stub_entry->target_value
11172 + stub_entry->target_section->output_offset
11173 + stub_entry->target_section->output_section->vma);
11174 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11175 off = dest;
11176
11177 /* And this is where we are coming from. */
11178 off -= (stub_entry->stub_offset
11179 + stub_entry->group->stub_sec->output_offset
11180 + stub_entry->group->stub_sec->output_section->vma);
11181
11182 p = loc;
11183 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11184 {
11185 bfd_vma r2off = get_r2off (info, stub_entry);
11186
11187 if (r2off == (bfd_vma) -1)
11188 {
11189 htab->stub_error = TRUE;
11190 return FALSE;
11191 }
11192 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p);
11193 p += 4;
11194 if (PPC_HA (r2off) != 0)
11195 {
11196 bfd_put_32 (htab->params->stub_bfd,
11197 ADDIS_R2_R2 | PPC_HA (r2off), p);
11198 p += 4;
11199 }
11200 if (PPC_LO (r2off) != 0)
11201 {
11202 bfd_put_32 (htab->params->stub_bfd,
11203 ADDI_R2_R2 | PPC_LO (r2off), p);
11204 p += 4;
11205 }
11206 off -= p - loc;
11207 }
11208 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), p);
11209 p += 4;
11210
11211 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
11212 {
11213 _bfd_error_handler
11214 (_("long branch stub `%s' offset overflow"),
11215 stub_entry->root.string);
11216 htab->stub_error = TRUE;
11217 return FALSE;
11218 }
11219
11220 if (info->emitrelocations)
11221 {
11222 r = get_relocs (stub_entry->group->stub_sec, 1);
11223 if (r == NULL)
11224 return FALSE;
11225 r->r_offset = p - 4 - stub_entry->group->stub_sec->contents;
11226 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
11227 r->r_addend = dest;
11228 if (stub_entry->h != NULL)
11229 {
11230 struct elf_link_hash_entry **hashes;
11231 unsigned long symndx;
11232 struct ppc_link_hash_entry *h;
11233
11234 hashes = elf_sym_hashes (htab->params->stub_bfd);
11235 if (hashes == NULL)
11236 {
11237 bfd_size_type hsize;
11238
11239 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
11240 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
11241 if (hashes == NULL)
11242 return FALSE;
11243 elf_sym_hashes (htab->params->stub_bfd) = hashes;
11244 htab->stub_globals = 1;
11245 }
11246 symndx = htab->stub_globals++;
11247 h = stub_entry->h;
11248 hashes[symndx] = &h->elf;
11249 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
11250 if (h->oh != NULL && h->oh->is_func)
11251 h = ppc_follow_link (h->oh);
11252 if (h->elf.root.u.def.section != stub_entry->target_section)
11253 /* H is an opd symbol. The addend must be zero. */
11254 r->r_addend = 0;
11255 else
11256 {
11257 off = (h->elf.root.u.def.value
11258 + h->elf.root.u.def.section->output_offset
11259 + h->elf.root.u.def.section->output_section->vma);
11260 r->r_addend -= off;
11261 }
11262 }
11263 }
11264 break;
11265
11266 case ppc_stub_plt_branch:
11267 case ppc_stub_plt_branch_r2off:
11268 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11269 stub_entry->root.string + 9,
11270 FALSE, FALSE);
11271 if (br_entry == NULL)
11272 {
11273 _bfd_error_handler (_("can't find branch stub `%s'"),
11274 stub_entry->root.string);
11275 htab->stub_error = TRUE;
11276 return FALSE;
11277 }
11278
11279 dest = (stub_entry->target_value
11280 + stub_entry->target_section->output_offset
11281 + stub_entry->target_section->output_section->vma);
11282 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11283 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11284
11285 bfd_put_64 (htab->brlt->owner, dest,
11286 htab->brlt->contents + br_entry->offset);
11287
11288 if (br_entry->iter == htab->stub_iteration)
11289 {
11290 br_entry->iter = 0;
11291
11292 if (htab->relbrlt != NULL)
11293 {
11294 /* Create a reloc for the branch lookup table entry. */
11295 Elf_Internal_Rela rela;
11296 bfd_byte *rl;
11297
11298 rela.r_offset = (br_entry->offset
11299 + htab->brlt->output_offset
11300 + htab->brlt->output_section->vma);
11301 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11302 rela.r_addend = dest;
11303
11304 rl = htab->relbrlt->contents;
11305 rl += (htab->relbrlt->reloc_count++
11306 * sizeof (Elf64_External_Rela));
11307 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11308 }
11309 else if (info->emitrelocations)
11310 {
11311 r = get_relocs (htab->brlt, 1);
11312 if (r == NULL)
11313 return FALSE;
11314 /* brlt, being SEC_LINKER_CREATED does not go through the
11315 normal reloc processing. Symbols and offsets are not
11316 translated from input file to output file form, so
11317 set up the offset per the output file. */
11318 r->r_offset = (br_entry->offset
11319 + htab->brlt->output_offset
11320 + htab->brlt->output_section->vma);
11321 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11322 r->r_addend = dest;
11323 }
11324 }
11325
11326 dest = (br_entry->offset
11327 + htab->brlt->output_offset
11328 + htab->brlt->output_section->vma);
11329
11330 off = (dest
11331 - elf_gp (info->output_bfd)
11332 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11333
11334 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11335 {
11336 info->callbacks->einfo
11337 (_("%P: linkage table error against `%pT'\n"),
11338 stub_entry->root.string);
11339 bfd_set_error (bfd_error_bad_value);
11340 htab->stub_error = TRUE;
11341 return FALSE;
11342 }
11343
11344 if (info->emitrelocations)
11345 {
11346 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11347 if (r == NULL)
11348 return FALSE;
11349 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11350 if (bfd_big_endian (info->output_bfd))
11351 r[0].r_offset += 2;
11352 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11353 r[0].r_offset += 4;
11354 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11355 r[0].r_addend = dest;
11356 if (PPC_HA (off) != 0)
11357 {
11358 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11359 r[1].r_offset = r[0].r_offset + 4;
11360 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11361 r[1].r_addend = r[0].r_addend;
11362 }
11363 }
11364
11365 p = loc;
11366 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11367 {
11368 if (PPC_HA (off) != 0)
11369 {
11370 bfd_put_32 (htab->params->stub_bfd,
11371 ADDIS_R12_R2 | PPC_HA (off), p);
11372 p += 4;
11373 bfd_put_32 (htab->params->stub_bfd,
11374 LD_R12_0R12 | PPC_LO (off), p);
11375 }
11376 else
11377 bfd_put_32 (htab->params->stub_bfd,
11378 LD_R12_0R2 | PPC_LO (off), p);
11379 }
11380 else
11381 {
11382 bfd_vma r2off = get_r2off (info, stub_entry);
11383
11384 if (r2off == (bfd_vma) -1)
11385 {
11386 htab->stub_error = TRUE;
11387 return FALSE;
11388 }
11389
11390 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p);
11391 p += 4;
11392 if (PPC_HA (off) != 0)
11393 {
11394 bfd_put_32 (htab->params->stub_bfd,
11395 ADDIS_R12_R2 | PPC_HA (off), p);
11396 p += 4;
11397 bfd_put_32 (htab->params->stub_bfd,
11398 LD_R12_0R12 | PPC_LO (off), p);
11399 }
11400 else
11401 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), p);
11402
11403 if (PPC_HA (r2off) != 0)
11404 {
11405 p += 4;
11406 bfd_put_32 (htab->params->stub_bfd,
11407 ADDIS_R2_R2 | PPC_HA (r2off), p);
11408 }
11409 if (PPC_LO (r2off) != 0)
11410 {
11411 p += 4;
11412 bfd_put_32 (htab->params->stub_bfd,
11413 ADDI_R2_R2 | PPC_LO (r2off), p);
11414 }
11415 }
11416 p += 4;
11417 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, p);
11418 p += 4;
11419 bfd_put_32 (htab->params->stub_bfd, BCTR, p);
11420 p += 4;
11421 break;
11422
11423 case ppc_stub_plt_call:
11424 case ppc_stub_plt_call_r2save:
11425 if (stub_entry->h != NULL
11426 && stub_entry->h->is_func_descriptor
11427 && stub_entry->h->oh != NULL)
11428 {
11429 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11430
11431 /* If the old-ABI "dot-symbol" is undefined make it weak so
11432 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11433 if (fh->elf.root.type == bfd_link_hash_undefined
11434 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11435 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11436 fh->elf.root.type = bfd_link_hash_undefweak;
11437 }
11438
11439 /* Now build the stub. */
11440 dest = stub_entry->plt_ent->plt.offset & ~1;
11441 if (dest >= (bfd_vma) -2)
11442 abort ();
11443
11444 plt = htab->elf.splt;
11445 if (!htab->elf.dynamic_sections_created
11446 || stub_entry->h == NULL
11447 || stub_entry->h->elf.dynindx == -1)
11448 {
11449 if (stub_entry->symtype == STT_GNU_IFUNC)
11450 plt = htab->elf.iplt;
11451 else
11452 plt = htab->pltlocal;
11453 }
11454
11455 dest += plt->output_offset + plt->output_section->vma;
11456
11457 off = (dest
11458 - elf_gp (info->output_bfd)
11459 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11460
11461 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11462 {
11463 info->callbacks->einfo
11464 /* xgettext:c-format */
11465 (_("%P: linkage table error against `%pT'\n"),
11466 stub_entry->h != NULL
11467 ? stub_entry->h->elf.root.root.string
11468 : "<local sym>");
11469 bfd_set_error (bfd_error_bad_value);
11470 htab->stub_error = TRUE;
11471 return FALSE;
11472 }
11473
11474 if (htab->params->plt_stub_align != 0)
11475 {
11476 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11477
11478 stub_entry->group->stub_sec->size += pad;
11479 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11480 loc += pad;
11481 }
11482
11483 r = NULL;
11484 if (info->emitrelocations)
11485 {
11486 r = get_relocs (stub_entry->group->stub_sec,
11487 ((PPC_HA (off) != 0)
11488 + (htab->opd_abi
11489 ? 2 + (htab->params->plt_static_chain
11490 && PPC_HA (off + 16) == PPC_HA (off))
11491 : 1)));
11492 if (r == NULL)
11493 return FALSE;
11494 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11495 if (bfd_big_endian (info->output_bfd))
11496 r[0].r_offset += 2;
11497 r[0].r_addend = dest;
11498 }
11499 if (stub_entry->h != NULL
11500 && (stub_entry->h == htab->tls_get_addr_fd
11501 || stub_entry->h == htab->tls_get_addr)
11502 && htab->params->tls_get_addr_opt)
11503 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11504 else
11505 p = build_plt_stub (htab, stub_entry, loc, off, r);
11506 break;
11507
11508 case ppc_stub_save_res:
11509 return TRUE;
11510
11511 default:
11512 BFD_FAIL ();
11513 return FALSE;
11514 }
11515
11516 stub_entry->group->stub_sec->size += p - loc;
11517
11518 if (htab->params->emit_stub_syms)
11519 {
11520 struct elf_link_hash_entry *h;
11521 size_t len1, len2;
11522 char *name;
11523 const char *const stub_str[] = { "long_branch",
11524 "long_branch_r2off",
11525 "plt_branch",
11526 "plt_branch_r2off",
11527 "plt_call",
11528 "plt_call" };
11529
11530 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11531 len2 = strlen (stub_entry->root.string);
11532 name = bfd_malloc (len1 + len2 + 2);
11533 if (name == NULL)
11534 return FALSE;
11535 memcpy (name, stub_entry->root.string, 9);
11536 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11537 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11538 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11539 if (h == NULL)
11540 return FALSE;
11541 if (h->root.type == bfd_link_hash_new)
11542 {
11543 h->root.type = bfd_link_hash_defined;
11544 h->root.u.def.section = stub_entry->group->stub_sec;
11545 h->root.u.def.value = stub_entry->stub_offset;
11546 h->ref_regular = 1;
11547 h->def_regular = 1;
11548 h->ref_regular_nonweak = 1;
11549 h->forced_local = 1;
11550 h->non_elf = 0;
11551 h->root.linker_def = 1;
11552 }
11553 }
11554
11555 return TRUE;
11556 }
11557
11558 /* As above, but don't actually build the stub. Just bump offset so
11559 we know stub section sizes, and select plt_branch stubs where
11560 long_branch stubs won't do. */
11561
11562 static bfd_boolean
11563 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11564 {
11565 struct ppc_stub_hash_entry *stub_entry;
11566 struct bfd_link_info *info;
11567 struct ppc_link_hash_table *htab;
11568 bfd_vma off;
11569 int size;
11570
11571 /* Massage our args to the form they really have. */
11572 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11573 info = in_arg;
11574
11575 htab = ppc_hash_table (info);
11576 if (htab == NULL)
11577 return FALSE;
11578
11579 if (stub_entry->h != NULL
11580 && stub_entry->h->save_res
11581 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11582 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11583 {
11584 /* Don't make stubs to out-of-line register save/restore
11585 functions. Instead, emit copies of the functions. */
11586 stub_entry->group->needs_save_res = 1;
11587 stub_entry->stub_type = ppc_stub_save_res;
11588 return TRUE;
11589 }
11590
11591 if (stub_entry->stub_type == ppc_stub_plt_call
11592 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11593 {
11594 asection *plt;
11595 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11596 if (off >= (bfd_vma) -2)
11597 abort ();
11598 plt = htab->elf.splt;
11599 if (!htab->elf.dynamic_sections_created
11600 || stub_entry->h == NULL
11601 || stub_entry->h->elf.dynindx == -1)
11602 {
11603 if (stub_entry->symtype == STT_GNU_IFUNC)
11604 plt = htab->elf.iplt;
11605 else
11606 plt = htab->pltlocal;
11607 }
11608 off += (plt->output_offset
11609 + plt->output_section->vma
11610 - elf_gp (info->output_bfd)
11611 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11612
11613 size = plt_stub_size (htab, stub_entry, off);
11614 if (stub_entry->h != NULL
11615 && (stub_entry->h == htab->tls_get_addr_fd
11616 || stub_entry->h == htab->tls_get_addr)
11617 && htab->params->tls_get_addr_opt
11618 && (ALWAYS_EMIT_R2SAVE
11619 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11620 stub_entry->group->tls_get_addr_opt_bctrl
11621 = stub_entry->group->stub_sec->size + size - 5 * 4;
11622
11623 if (htab->params->plt_stub_align)
11624 size += plt_stub_pad (htab, stub_entry, off);
11625 if (info->emitrelocations)
11626 {
11627 stub_entry->group->stub_sec->reloc_count
11628 += ((PPC_HA (off) != 0)
11629 + (htab->opd_abi
11630 ? 2 + (htab->params->plt_static_chain
11631 && PPC_HA (off + 16) == PPC_HA (off))
11632 : 1));
11633 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11634 }
11635 }
11636 else
11637 {
11638 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11639 variants. */
11640 bfd_vma r2off = 0;
11641 bfd_vma local_off = 0;
11642
11643 off = (stub_entry->target_value
11644 + stub_entry->target_section->output_offset
11645 + stub_entry->target_section->output_section->vma);
11646 off -= (stub_entry->group->stub_sec->size
11647 + stub_entry->group->stub_sec->output_offset
11648 + stub_entry->group->stub_sec->output_section->vma);
11649
11650 /* Reset the stub type from the plt variant in case we now
11651 can reach with a shorter stub. */
11652 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11653 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11654
11655 size = 4;
11656 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11657 {
11658 r2off = get_r2off (info, stub_entry);
11659 if (r2off == (bfd_vma) -1)
11660 {
11661 htab->stub_error = TRUE;
11662 return FALSE;
11663 }
11664 size = 8;
11665 if (PPC_HA (r2off) != 0)
11666 size += 4;
11667 if (PPC_LO (r2off) != 0)
11668 size += 4;
11669 off -= size - 4;
11670 }
11671
11672 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11673
11674 /* If the branch offset is too big, use a ppc_stub_plt_branch.
11675 Do the same for -R objects without function descriptors. */
11676 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11677 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11678 && r2off == 0
11679 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11680 {
11681 struct ppc_branch_hash_entry *br_entry;
11682
11683 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11684 stub_entry->root.string + 9,
11685 TRUE, FALSE);
11686 if (br_entry == NULL)
11687 {
11688 _bfd_error_handler (_("can't build branch stub `%s'"),
11689 stub_entry->root.string);
11690 htab->stub_error = TRUE;
11691 return FALSE;
11692 }
11693
11694 if (br_entry->iter != htab->stub_iteration)
11695 {
11696 br_entry->iter = htab->stub_iteration;
11697 br_entry->offset = htab->brlt->size;
11698 htab->brlt->size += 8;
11699
11700 if (htab->relbrlt != NULL)
11701 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11702 else if (info->emitrelocations)
11703 {
11704 htab->brlt->reloc_count += 1;
11705 htab->brlt->flags |= SEC_RELOC;
11706 }
11707 }
11708
11709 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11710 off = (br_entry->offset
11711 + htab->brlt->output_offset
11712 + htab->brlt->output_section->vma
11713 - elf_gp (info->output_bfd)
11714 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11715
11716 if (info->emitrelocations)
11717 {
11718 stub_entry->group->stub_sec->reloc_count
11719 += 1 + (PPC_HA (off) != 0);
11720 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11721 }
11722
11723 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11724 {
11725 size = 12;
11726 if (PPC_HA (off) != 0)
11727 size = 16;
11728 }
11729 else
11730 {
11731 size = 16;
11732 if (PPC_HA (off) != 0)
11733 size += 4;
11734
11735 if (PPC_HA (r2off) != 0)
11736 size += 4;
11737 if (PPC_LO (r2off) != 0)
11738 size += 4;
11739 }
11740 }
11741 else if (info->emitrelocations)
11742 {
11743 stub_entry->group->stub_sec->reloc_count += 1;
11744 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11745 }
11746 }
11747
11748 stub_entry->group->stub_sec->size += size;
11749 return TRUE;
11750 }
11751
11752 /* Set up various things so that we can make a list of input sections
11753 for each output section included in the link. Returns -1 on error,
11754 0 when no stubs will be needed, and 1 on success. */
11755
11756 int
11757 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11758 {
11759 unsigned int id;
11760 bfd_size_type amt;
11761 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11762
11763 if (htab == NULL)
11764 return -1;
11765
11766 htab->sec_info_arr_size = _bfd_section_id;
11767 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11768 htab->sec_info = bfd_zmalloc (amt);
11769 if (htab->sec_info == NULL)
11770 return -1;
11771
11772 /* Set toc_off for com, und, abs and ind sections. */
11773 for (id = 0; id < 3; id++)
11774 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11775
11776 return 1;
11777 }
11778
11779 /* Set up for first pass at multitoc partitioning. */
11780
11781 void
11782 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11783 {
11784 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11785
11786 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11787 htab->toc_bfd = NULL;
11788 htab->toc_first_sec = NULL;
11789 }
11790
11791 /* The linker repeatedly calls this function for each TOC input section
11792 and linker generated GOT section. Group input bfds such that the toc
11793 within a group is less than 64k in size. */
11794
11795 bfd_boolean
11796 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11797 {
11798 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11799 bfd_vma addr, off, limit;
11800
11801 if (htab == NULL)
11802 return FALSE;
11803
11804 if (!htab->second_toc_pass)
11805 {
11806 /* Keep track of the first .toc or .got section for this input bfd. */
11807 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11808
11809 if (new_bfd)
11810 {
11811 htab->toc_bfd = isec->owner;
11812 htab->toc_first_sec = isec;
11813 }
11814
11815 addr = isec->output_offset + isec->output_section->vma;
11816 off = addr - htab->toc_curr;
11817 limit = 0x80008000;
11818 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11819 limit = 0x10000;
11820 if (off + isec->size > limit)
11821 {
11822 addr = (htab->toc_first_sec->output_offset
11823 + htab->toc_first_sec->output_section->vma);
11824 htab->toc_curr = addr;
11825 htab->toc_curr &= -TOC_BASE_ALIGN;
11826 }
11827
11828 /* toc_curr is the base address of this toc group. Set elf_gp
11829 for the input section to be the offset relative to the
11830 output toc base plus 0x8000. Making the input elf_gp an
11831 offset allows us to move the toc as a whole without
11832 recalculating input elf_gp. */
11833 off = htab->toc_curr - elf_gp (info->output_bfd);
11834 off += TOC_BASE_OFF;
11835
11836 /* Die if someone uses a linker script that doesn't keep input
11837 file .toc and .got together. */
11838 if (new_bfd
11839 && elf_gp (isec->owner) != 0
11840 && elf_gp (isec->owner) != off)
11841 return FALSE;
11842
11843 elf_gp (isec->owner) = off;
11844 return TRUE;
11845 }
11846
11847 /* During the second pass toc_first_sec points to the start of
11848 a toc group, and toc_curr is used to track the old elf_gp.
11849 We use toc_bfd to ensure we only look at each bfd once. */
11850 if (htab->toc_bfd == isec->owner)
11851 return TRUE;
11852 htab->toc_bfd = isec->owner;
11853
11854 if (htab->toc_first_sec == NULL
11855 || htab->toc_curr != elf_gp (isec->owner))
11856 {
11857 htab->toc_curr = elf_gp (isec->owner);
11858 htab->toc_first_sec = isec;
11859 }
11860 addr = (htab->toc_first_sec->output_offset
11861 + htab->toc_first_sec->output_section->vma);
11862 off = addr - elf_gp (info->output_bfd) + TOC_BASE_OFF;
11863 elf_gp (isec->owner) = off;
11864
11865 return TRUE;
11866 }
11867
11868 /* Called via elf_link_hash_traverse to merge GOT entries for global
11869 symbol H. */
11870
11871 static bfd_boolean
11872 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11873 {
11874 if (h->root.type == bfd_link_hash_indirect)
11875 return TRUE;
11876
11877 merge_got_entries (&h->got.glist);
11878
11879 return TRUE;
11880 }
11881
11882 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11883 symbol H. */
11884
11885 static bfd_boolean
11886 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11887 {
11888 struct got_entry *gent;
11889
11890 if (h->root.type == bfd_link_hash_indirect)
11891 return TRUE;
11892
11893 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11894 if (!gent->is_indirect)
11895 allocate_got (h, (struct bfd_link_info *) inf, gent);
11896 return TRUE;
11897 }
11898
11899 /* Called on the first multitoc pass after the last call to
11900 ppc64_elf_next_toc_section. This function removes duplicate GOT
11901 entries. */
11902
11903 bfd_boolean
11904 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11905 {
11906 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11907 struct bfd *ibfd, *ibfd2;
11908 bfd_boolean done_something;
11909
11910 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11911
11912 if (!htab->do_multi_toc)
11913 return FALSE;
11914
11915 /* Merge global sym got entries within a toc group. */
11916 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11917
11918 /* And tlsld_got. */
11919 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11920 {
11921 struct got_entry *ent, *ent2;
11922
11923 if (!is_ppc64_elf (ibfd))
11924 continue;
11925
11926 ent = ppc64_tlsld_got (ibfd);
11927 if (!ent->is_indirect
11928 && ent->got.offset != (bfd_vma) -1)
11929 {
11930 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11931 {
11932 if (!is_ppc64_elf (ibfd2))
11933 continue;
11934
11935 ent2 = ppc64_tlsld_got (ibfd2);
11936 if (!ent2->is_indirect
11937 && ent2->got.offset != (bfd_vma) -1
11938 && elf_gp (ibfd2) == elf_gp (ibfd))
11939 {
11940 ent2->is_indirect = TRUE;
11941 ent2->got.ent = ent;
11942 }
11943 }
11944 }
11945 }
11946
11947 /* Zap sizes of got sections. */
11948 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11949 htab->elf.irelplt->size -= htab->got_reli_size;
11950 htab->got_reli_size = 0;
11951
11952 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11953 {
11954 asection *got, *relgot;
11955
11956 if (!is_ppc64_elf (ibfd))
11957 continue;
11958
11959 got = ppc64_elf_tdata (ibfd)->got;
11960 if (got != NULL)
11961 {
11962 got->rawsize = got->size;
11963 got->size = 0;
11964 relgot = ppc64_elf_tdata (ibfd)->relgot;
11965 relgot->rawsize = relgot->size;
11966 relgot->size = 0;
11967 }
11968 }
11969
11970 /* Now reallocate the got, local syms first. We don't need to
11971 allocate section contents again since we never increase size. */
11972 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11973 {
11974 struct got_entry **lgot_ents;
11975 struct got_entry **end_lgot_ents;
11976 struct plt_entry **local_plt;
11977 struct plt_entry **end_local_plt;
11978 unsigned char *lgot_masks;
11979 bfd_size_type locsymcount;
11980 Elf_Internal_Shdr *symtab_hdr;
11981 asection *s;
11982
11983 if (!is_ppc64_elf (ibfd))
11984 continue;
11985
11986 lgot_ents = elf_local_got_ents (ibfd);
11987 if (!lgot_ents)
11988 continue;
11989
11990 symtab_hdr = &elf_symtab_hdr (ibfd);
11991 locsymcount = symtab_hdr->sh_info;
11992 end_lgot_ents = lgot_ents + locsymcount;
11993 local_plt = (struct plt_entry **) end_lgot_ents;
11994 end_local_plt = local_plt + locsymcount;
11995 lgot_masks = (unsigned char *) end_local_plt;
11996 s = ppc64_elf_tdata (ibfd)->got;
11997 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11998 {
11999 struct got_entry *ent;
12000
12001 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
12002 {
12003 unsigned int ent_size = 8;
12004 unsigned int rel_size = sizeof (Elf64_External_Rela);
12005
12006 ent->got.offset = s->size;
12007 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
12008 {
12009 ent_size *= 2;
12010 rel_size *= 2;
12011 }
12012 s->size += ent_size;
12013 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
12014 {
12015 htab->elf.irelplt->size += rel_size;
12016 htab->got_reli_size += rel_size;
12017 }
12018 else if (bfd_link_pic (info)
12019 && !((ent->tls_type & TLS_TPREL) != 0
12020 && bfd_link_executable (info)))
12021 {
12022 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
12023 srel->size += rel_size;
12024 }
12025 }
12026 }
12027 }
12028
12029 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
12030
12031 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
12032 {
12033 struct got_entry *ent;
12034
12035 if (!is_ppc64_elf (ibfd))
12036 continue;
12037
12038 ent = ppc64_tlsld_got (ibfd);
12039 if (!ent->is_indirect
12040 && ent->got.offset != (bfd_vma) -1)
12041 {
12042 asection *s = ppc64_elf_tdata (ibfd)->got;
12043 ent->got.offset = s->size;
12044 s->size += 16;
12045 if (bfd_link_pic (info))
12046 {
12047 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
12048 srel->size += sizeof (Elf64_External_Rela);
12049 }
12050 }
12051 }
12052
12053 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
12054 if (!done_something)
12055 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
12056 {
12057 asection *got;
12058
12059 if (!is_ppc64_elf (ibfd))
12060 continue;
12061
12062 got = ppc64_elf_tdata (ibfd)->got;
12063 if (got != NULL)
12064 {
12065 done_something = got->rawsize != got->size;
12066 if (done_something)
12067 break;
12068 }
12069 }
12070
12071 if (done_something)
12072 (*htab->params->layout_sections_again) ();
12073
12074 /* Set up for second pass over toc sections to recalculate elf_gp
12075 on input sections. */
12076 htab->toc_bfd = NULL;
12077 htab->toc_first_sec = NULL;
12078 htab->second_toc_pass = TRUE;
12079 return done_something;
12080 }
12081
12082 /* Called after second pass of multitoc partitioning. */
12083
12084 void
12085 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
12086 {
12087 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12088
12089 /* After the second pass, toc_curr tracks the TOC offset used
12090 for code sections below in ppc64_elf_next_input_section. */
12091 htab->toc_curr = TOC_BASE_OFF;
12092 }
12093
12094 /* No toc references were found in ISEC. If the code in ISEC makes no
12095 calls, then there's no need to use toc adjusting stubs when branching
12096 into ISEC. Actually, indirect calls from ISEC are OK as they will
12097 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
12098 needed, and 2 if a cyclical call-graph was found but no other reason
12099 for a stub was detected. If called from the top level, a return of
12100 2 means the same as a return of 0. */
12101
12102 static int
12103 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
12104 {
12105 int ret;
12106
12107 /* Mark this section as checked. */
12108 isec->call_check_done = 1;
12109
12110 /* We know none of our code bearing sections will need toc stubs. */
12111 if ((isec->flags & SEC_LINKER_CREATED) != 0)
12112 return 0;
12113
12114 if (isec->size == 0)
12115 return 0;
12116
12117 if (isec->output_section == NULL)
12118 return 0;
12119
12120 ret = 0;
12121 if (isec->reloc_count != 0)
12122 {
12123 Elf_Internal_Rela *relstart, *rel;
12124 Elf_Internal_Sym *local_syms;
12125 struct ppc_link_hash_table *htab;
12126
12127 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
12128 info->keep_memory);
12129 if (relstart == NULL)
12130 return -1;
12131
12132 /* Look for branches to outside of this section. */
12133 local_syms = NULL;
12134 htab = ppc_hash_table (info);
12135 if (htab == NULL)
12136 return -1;
12137
12138 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
12139 {
12140 enum elf_ppc64_reloc_type r_type;
12141 unsigned long r_symndx;
12142 struct elf_link_hash_entry *h;
12143 struct ppc_link_hash_entry *eh;
12144 Elf_Internal_Sym *sym;
12145 asection *sym_sec;
12146 struct _opd_sec_data *opd;
12147 bfd_vma sym_value;
12148 bfd_vma dest;
12149
12150 r_type = ELF64_R_TYPE (rel->r_info);
12151 if (r_type != R_PPC64_REL24
12152 && r_type != R_PPC64_REL14
12153 && r_type != R_PPC64_REL14_BRTAKEN
12154 && r_type != R_PPC64_REL14_BRNTAKEN
12155 && r_type != R_PPC64_PLTCALL)
12156 continue;
12157
12158 r_symndx = ELF64_R_SYM (rel->r_info);
12159 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
12160 isec->owner))
12161 {
12162 ret = -1;
12163 break;
12164 }
12165
12166 /* Calls to dynamic lib functions go through a plt call stub
12167 that uses r2. */
12168 eh = (struct ppc_link_hash_entry *) h;
12169 if (eh != NULL
12170 && (eh->elf.plt.plist != NULL
12171 || (eh->oh != NULL
12172 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
12173 {
12174 ret = 1;
12175 break;
12176 }
12177
12178 if (sym_sec == NULL)
12179 /* Ignore other undefined symbols. */
12180 continue;
12181
12182 /* Assume branches to other sections not included in the
12183 link need stubs too, to cover -R and absolute syms. */
12184 if (sym_sec->output_section == NULL)
12185 {
12186 ret = 1;
12187 break;
12188 }
12189
12190 if (h == NULL)
12191 sym_value = sym->st_value;
12192 else
12193 {
12194 if (h->root.type != bfd_link_hash_defined
12195 && h->root.type != bfd_link_hash_defweak)
12196 abort ();
12197 sym_value = h->root.u.def.value;
12198 }
12199 sym_value += rel->r_addend;
12200
12201 /* If this branch reloc uses an opd sym, find the code section. */
12202 opd = get_opd_info (sym_sec);
12203 if (opd != NULL)
12204 {
12205 if (h == NULL && opd->adjust != NULL)
12206 {
12207 long adjust;
12208
12209 adjust = opd->adjust[OPD_NDX (sym_value)];
12210 if (adjust == -1)
12211 /* Assume deleted functions won't ever be called. */
12212 continue;
12213 sym_value += adjust;
12214 }
12215
12216 dest = opd_entry_value (sym_sec, sym_value,
12217 &sym_sec, NULL, FALSE);
12218 if (dest == (bfd_vma) -1)
12219 continue;
12220 }
12221 else
12222 dest = (sym_value
12223 + sym_sec->output_offset
12224 + sym_sec->output_section->vma);
12225
12226 /* Ignore branch to self. */
12227 if (sym_sec == isec)
12228 continue;
12229
12230 /* If the called function uses the toc, we need a stub. */
12231 if (sym_sec->has_toc_reloc
12232 || sym_sec->makes_toc_func_call)
12233 {
12234 ret = 1;
12235 break;
12236 }
12237
12238 /* Assume any branch that needs a long branch stub might in fact
12239 need a plt_branch stub. A plt_branch stub uses r2. */
12240 else if (dest - (isec->output_offset
12241 + isec->output_section->vma
12242 + rel->r_offset) + (1 << 25)
12243 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
12244 ? h->other
12245 : sym->st_other))
12246 {
12247 ret = 1;
12248 break;
12249 }
12250
12251 /* If calling back to a section in the process of being
12252 tested, we can't say for sure that no toc adjusting stubs
12253 are needed, so don't return zero. */
12254 else if (sym_sec->call_check_in_progress)
12255 ret = 2;
12256
12257 /* Branches to another section that itself doesn't have any TOC
12258 references are OK. Recursively call ourselves to check. */
12259 else if (!sym_sec->call_check_done)
12260 {
12261 int recur;
12262
12263 /* Mark current section as indeterminate, so that other
12264 sections that call back to current won't be marked as
12265 known. */
12266 isec->call_check_in_progress = 1;
12267 recur = toc_adjusting_stub_needed (info, sym_sec);
12268 isec->call_check_in_progress = 0;
12269
12270 if (recur != 0)
12271 {
12272 ret = recur;
12273 if (recur != 2)
12274 break;
12275 }
12276 }
12277 }
12278
12279 if (local_syms != NULL
12280 && (elf_symtab_hdr (isec->owner).contents
12281 != (unsigned char *) local_syms))
12282 free (local_syms);
12283 if (elf_section_data (isec)->relocs != relstart)
12284 free (relstart);
12285 }
12286
12287 if ((ret & 1) == 0
12288 && isec->map_head.s != NULL
12289 && (strcmp (isec->output_section->name, ".init") == 0
12290 || strcmp (isec->output_section->name, ".fini") == 0))
12291 {
12292 if (isec->map_head.s->has_toc_reloc
12293 || isec->map_head.s->makes_toc_func_call)
12294 ret = 1;
12295 else if (!isec->map_head.s->call_check_done)
12296 {
12297 int recur;
12298 isec->call_check_in_progress = 1;
12299 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12300 isec->call_check_in_progress = 0;
12301 if (recur != 0)
12302 ret = recur;
12303 }
12304 }
12305
12306 if (ret == 1)
12307 isec->makes_toc_func_call = 1;
12308
12309 return ret;
12310 }
12311
12312 /* The linker repeatedly calls this function for each input section,
12313 in the order that input sections are linked into output sections.
12314 Build lists of input sections to determine groupings between which
12315 we may insert linker stubs. */
12316
12317 bfd_boolean
12318 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12319 {
12320 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12321
12322 if (htab == NULL)
12323 return FALSE;
12324
12325 if ((isec->output_section->flags & SEC_CODE) != 0
12326 && isec->output_section->id < htab->sec_info_arr_size)
12327 {
12328 /* This happens to make the list in reverse order,
12329 which is what we want. */
12330 htab->sec_info[isec->id].u.list
12331 = htab->sec_info[isec->output_section->id].u.list;
12332 htab->sec_info[isec->output_section->id].u.list = isec;
12333 }
12334
12335 if (htab->multi_toc_needed)
12336 {
12337 /* Analyse sections that aren't already flagged as needing a
12338 valid toc pointer. Exclude .fixup for the linux kernel.
12339 .fixup contains branches, but only back to the function that
12340 hit an exception. */
12341 if (!(isec->has_toc_reloc
12342 || (isec->flags & SEC_CODE) == 0
12343 || strcmp (isec->name, ".fixup") == 0
12344 || isec->call_check_done))
12345 {
12346 if (toc_adjusting_stub_needed (info, isec) < 0)
12347 return FALSE;
12348 }
12349 /* Make all sections use the TOC assigned for this object file.
12350 This will be wrong for pasted sections; We fix that in
12351 check_pasted_section(). */
12352 if (elf_gp (isec->owner) != 0)
12353 htab->toc_curr = elf_gp (isec->owner);
12354 }
12355
12356 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12357 return TRUE;
12358 }
12359
12360 /* Check that all .init and .fini sections use the same toc, if they
12361 have toc relocs. */
12362
12363 static bfd_boolean
12364 check_pasted_section (struct bfd_link_info *info, const char *name)
12365 {
12366 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12367
12368 if (o != NULL)
12369 {
12370 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12371 bfd_vma toc_off = 0;
12372 asection *i;
12373
12374 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12375 if (i->has_toc_reloc)
12376 {
12377 if (toc_off == 0)
12378 toc_off = htab->sec_info[i->id].toc_off;
12379 else if (toc_off != htab->sec_info[i->id].toc_off)
12380 return FALSE;
12381 }
12382
12383 if (toc_off == 0)
12384 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12385 if (i->makes_toc_func_call)
12386 {
12387 toc_off = htab->sec_info[i->id].toc_off;
12388 break;
12389 }
12390
12391 /* Make sure the whole pasted function uses the same toc offset. */
12392 if (toc_off != 0)
12393 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12394 htab->sec_info[i->id].toc_off = toc_off;
12395 }
12396 return TRUE;
12397 }
12398
12399 bfd_boolean
12400 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12401 {
12402 return (check_pasted_section (info, ".init")
12403 & check_pasted_section (info, ".fini"));
12404 }
12405
12406 /* See whether we can group stub sections together. Grouping stub
12407 sections may result in fewer stubs. More importantly, we need to
12408 put all .init* and .fini* stubs at the beginning of the .init or
12409 .fini output sections respectively, because glibc splits the
12410 _init and _fini functions into multiple parts. Putting a stub in
12411 the middle of a function is not a good idea. */
12412
12413 static bfd_boolean
12414 group_sections (struct bfd_link_info *info,
12415 bfd_size_type stub_group_size,
12416 bfd_boolean stubs_always_before_branch)
12417 {
12418 struct ppc_link_hash_table *htab;
12419 asection *osec;
12420 bfd_boolean suppress_size_errors;
12421
12422 htab = ppc_hash_table (info);
12423 if (htab == NULL)
12424 return FALSE;
12425
12426 suppress_size_errors = FALSE;
12427 if (stub_group_size == 1)
12428 {
12429 /* Default values. */
12430 if (stubs_always_before_branch)
12431 stub_group_size = 0x1e00000;
12432 else
12433 stub_group_size = 0x1c00000;
12434 suppress_size_errors = TRUE;
12435 }
12436
12437 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12438 {
12439 asection *tail;
12440
12441 if (osec->id >= htab->sec_info_arr_size)
12442 continue;
12443
12444 tail = htab->sec_info[osec->id].u.list;
12445 while (tail != NULL)
12446 {
12447 asection *curr;
12448 asection *prev;
12449 bfd_size_type total;
12450 bfd_boolean big_sec;
12451 bfd_vma curr_toc;
12452 struct map_stub *group;
12453 bfd_size_type group_size;
12454
12455 curr = tail;
12456 total = tail->size;
12457 group_size = (ppc64_elf_section_data (tail) != NULL
12458 && ppc64_elf_section_data (tail)->has_14bit_branch
12459 ? stub_group_size >> 10 : stub_group_size);
12460
12461 big_sec = total > group_size;
12462 if (big_sec && !suppress_size_errors)
12463 /* xgettext:c-format */
12464 _bfd_error_handler (_("%pB section %pA exceeds stub group size"),
12465 tail->owner, tail);
12466 curr_toc = htab->sec_info[tail->id].toc_off;
12467
12468 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12469 && ((total += curr->output_offset - prev->output_offset)
12470 < (ppc64_elf_section_data (prev) != NULL
12471 && ppc64_elf_section_data (prev)->has_14bit_branch
12472 ? (group_size = stub_group_size >> 10) : group_size))
12473 && htab->sec_info[prev->id].toc_off == curr_toc)
12474 curr = prev;
12475
12476 /* OK, the size from the start of CURR to the end is less
12477 than group_size and thus can be handled by one stub
12478 section. (or the tail section is itself larger than
12479 group_size, in which case we may be toast.) We should
12480 really be keeping track of the total size of stubs added
12481 here, as stubs contribute to the final output section
12482 size. That's a little tricky, and this way will only
12483 break if stubs added make the total size more than 2^25,
12484 ie. for the default stub_group_size, if stubs total more
12485 than 2097152 bytes, or nearly 75000 plt call stubs. */
12486 group = bfd_alloc (curr->owner, sizeof (*group));
12487 if (group == NULL)
12488 return FALSE;
12489 group->link_sec = curr;
12490 group->stub_sec = NULL;
12491 group->needs_save_res = 0;
12492 group->tls_get_addr_opt_bctrl = -1u;
12493 group->next = htab->group;
12494 htab->group = group;
12495 do
12496 {
12497 prev = htab->sec_info[tail->id].u.list;
12498 /* Set up this stub group. */
12499 htab->sec_info[tail->id].u.group = group;
12500 }
12501 while (tail != curr && (tail = prev) != NULL);
12502
12503 /* But wait, there's more! Input sections up to group_size
12504 bytes before the stub section can be handled by it too.
12505 Don't do this if we have a really large section after the
12506 stubs, as adding more stubs increases the chance that
12507 branches may not reach into the stub section. */
12508 if (!stubs_always_before_branch && !big_sec)
12509 {
12510 total = 0;
12511 while (prev != NULL
12512 && ((total += tail->output_offset - prev->output_offset)
12513 < (ppc64_elf_section_data (prev) != NULL
12514 && ppc64_elf_section_data (prev)->has_14bit_branch
12515 ? (group_size = stub_group_size >> 10) : group_size))
12516 && htab->sec_info[prev->id].toc_off == curr_toc)
12517 {
12518 tail = prev;
12519 prev = htab->sec_info[tail->id].u.list;
12520 htab->sec_info[tail->id].u.group = group;
12521 }
12522 }
12523 tail = prev;
12524 }
12525 }
12526 return TRUE;
12527 }
12528
12529 static const unsigned char glink_eh_frame_cie[] =
12530 {
12531 0, 0, 0, 16, /* length. */
12532 0, 0, 0, 0, /* id. */
12533 1, /* CIE version. */
12534 'z', 'R', 0, /* Augmentation string. */
12535 4, /* Code alignment. */
12536 0x78, /* Data alignment. */
12537 65, /* RA reg. */
12538 1, /* Augmentation size. */
12539 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12540 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12541 };
12542
12543 static size_t
12544 stub_eh_frame_size (struct map_stub *group, size_t align)
12545 {
12546 size_t this_size = 17;
12547 if (group->tls_get_addr_opt_bctrl != -1u)
12548 {
12549 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12550 if (to_bctrl < 64)
12551 this_size += 1;
12552 else if (to_bctrl < 256)
12553 this_size += 2;
12554 else if (to_bctrl < 65536)
12555 this_size += 3;
12556 else
12557 this_size += 5;
12558 this_size += 6;
12559 }
12560 this_size = (this_size + align - 1) & -align;
12561 return this_size;
12562 }
12563
12564 /* Stripping output sections is normally done before dynamic section
12565 symbols have been allocated. This function is called later, and
12566 handles cases like htab->brlt which is mapped to its own output
12567 section. */
12568
12569 static void
12570 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12571 {
12572 if (isec->size == 0
12573 && isec->output_section->size == 0
12574 && !(isec->output_section->flags & SEC_KEEP)
12575 && !bfd_section_removed_from_list (info->output_bfd,
12576 isec->output_section)
12577 && elf_section_data (isec->output_section)->dynindx == 0)
12578 {
12579 isec->output_section->flags |= SEC_EXCLUDE;
12580 bfd_section_list_remove (info->output_bfd, isec->output_section);
12581 info->output_bfd->section_count--;
12582 }
12583 }
12584
12585 /* Determine and set the size of the stub section for a final link.
12586
12587 The basic idea here is to examine all the relocations looking for
12588 PC-relative calls to a target that is unreachable with a "bl"
12589 instruction. */
12590
12591 bfd_boolean
12592 ppc64_elf_size_stubs (struct bfd_link_info *info)
12593 {
12594 bfd_size_type stub_group_size;
12595 bfd_boolean stubs_always_before_branch;
12596 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12597
12598 if (htab == NULL)
12599 return FALSE;
12600
12601 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12602 htab->params->plt_thread_safe = 1;
12603 if (!htab->opd_abi)
12604 htab->params->plt_thread_safe = 0;
12605 else if (htab->params->plt_thread_safe == -1)
12606 {
12607 static const char *const thread_starter[] =
12608 {
12609 "pthread_create",
12610 /* libstdc++ */
12611 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12612 /* librt */
12613 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12614 "mq_notify", "create_timer",
12615 /* libanl */
12616 "getaddrinfo_a",
12617 /* libgomp */
12618 "GOMP_parallel",
12619 "GOMP_parallel_start",
12620 "GOMP_parallel_loop_static",
12621 "GOMP_parallel_loop_static_start",
12622 "GOMP_parallel_loop_dynamic",
12623 "GOMP_parallel_loop_dynamic_start",
12624 "GOMP_parallel_loop_guided",
12625 "GOMP_parallel_loop_guided_start",
12626 "GOMP_parallel_loop_runtime",
12627 "GOMP_parallel_loop_runtime_start",
12628 "GOMP_parallel_sections",
12629 "GOMP_parallel_sections_start",
12630 /* libgo */
12631 "__go_go",
12632 };
12633 unsigned i;
12634
12635 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12636 {
12637 struct elf_link_hash_entry *h;
12638 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12639 FALSE, FALSE, TRUE);
12640 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12641 if (htab->params->plt_thread_safe)
12642 break;
12643 }
12644 }
12645 stubs_always_before_branch = htab->params->group_size < 0;
12646 if (htab->params->group_size < 0)
12647 stub_group_size = -htab->params->group_size;
12648 else
12649 stub_group_size = htab->params->group_size;
12650
12651 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12652 return FALSE;
12653
12654 #define STUB_SHRINK_ITER 20
12655 /* Loop until no stubs added. After iteration 20 of this loop we may
12656 exit on a stub section shrinking. This is to break out of a
12657 pathological case where adding stubs on one iteration decreases
12658 section gaps (perhaps due to alignment), which then requires
12659 fewer or smaller stubs on the next iteration. */
12660
12661 while (1)
12662 {
12663 bfd *input_bfd;
12664 unsigned int bfd_indx;
12665 struct map_stub *group;
12666
12667 htab->stub_iteration += 1;
12668
12669 for (input_bfd = info->input_bfds, bfd_indx = 0;
12670 input_bfd != NULL;
12671 input_bfd = input_bfd->link.next, bfd_indx++)
12672 {
12673 Elf_Internal_Shdr *symtab_hdr;
12674 asection *section;
12675 Elf_Internal_Sym *local_syms = NULL;
12676
12677 if (!is_ppc64_elf (input_bfd))
12678 continue;
12679
12680 /* We'll need the symbol table in a second. */
12681 symtab_hdr = &elf_symtab_hdr (input_bfd);
12682 if (symtab_hdr->sh_info == 0)
12683 continue;
12684
12685 /* Walk over each section attached to the input bfd. */
12686 for (section = input_bfd->sections;
12687 section != NULL;
12688 section = section->next)
12689 {
12690 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12691
12692 /* If there aren't any relocs, then there's nothing more
12693 to do. */
12694 if ((section->flags & SEC_RELOC) == 0
12695 || (section->flags & SEC_ALLOC) == 0
12696 || (section->flags & SEC_LOAD) == 0
12697 || (section->flags & SEC_CODE) == 0
12698 || section->reloc_count == 0)
12699 continue;
12700
12701 /* If this section is a link-once section that will be
12702 discarded, then don't create any stubs. */
12703 if (section->output_section == NULL
12704 || section->output_section->owner != info->output_bfd)
12705 continue;
12706
12707 /* Get the relocs. */
12708 internal_relocs
12709 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12710 info->keep_memory);
12711 if (internal_relocs == NULL)
12712 goto error_ret_free_local;
12713
12714 /* Now examine each relocation. */
12715 irela = internal_relocs;
12716 irelaend = irela + section->reloc_count;
12717 for (; irela < irelaend; irela++)
12718 {
12719 enum elf_ppc64_reloc_type r_type;
12720 unsigned int r_indx;
12721 enum ppc_stub_type stub_type;
12722 struct ppc_stub_hash_entry *stub_entry;
12723 asection *sym_sec, *code_sec;
12724 bfd_vma sym_value, code_value;
12725 bfd_vma destination;
12726 unsigned long local_off;
12727 bfd_boolean ok_dest;
12728 struct ppc_link_hash_entry *hash;
12729 struct ppc_link_hash_entry *fdh;
12730 struct elf_link_hash_entry *h;
12731 Elf_Internal_Sym *sym;
12732 char *stub_name;
12733 const asection *id_sec;
12734 struct _opd_sec_data *opd;
12735 struct plt_entry *plt_ent;
12736
12737 r_type = ELF64_R_TYPE (irela->r_info);
12738 r_indx = ELF64_R_SYM (irela->r_info);
12739
12740 if (r_type >= R_PPC64_max)
12741 {
12742 bfd_set_error (bfd_error_bad_value);
12743 goto error_ret_free_internal;
12744 }
12745
12746 /* Only look for stubs on branch instructions. */
12747 if (r_type != R_PPC64_REL24
12748 && r_type != R_PPC64_REL14
12749 && r_type != R_PPC64_REL14_BRTAKEN
12750 && r_type != R_PPC64_REL14_BRNTAKEN)
12751 continue;
12752
12753 /* Now determine the call target, its name, value,
12754 section. */
12755 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12756 r_indx, input_bfd))
12757 goto error_ret_free_internal;
12758 hash = (struct ppc_link_hash_entry *) h;
12759
12760 ok_dest = FALSE;
12761 fdh = NULL;
12762 sym_value = 0;
12763 if (hash == NULL)
12764 {
12765 sym_value = sym->st_value;
12766 if (sym_sec != NULL
12767 && sym_sec->output_section != NULL)
12768 ok_dest = TRUE;
12769 }
12770 else if (hash->elf.root.type == bfd_link_hash_defined
12771 || hash->elf.root.type == bfd_link_hash_defweak)
12772 {
12773 sym_value = hash->elf.root.u.def.value;
12774 if (sym_sec->output_section != NULL)
12775 ok_dest = TRUE;
12776 }
12777 else if (hash->elf.root.type == bfd_link_hash_undefweak
12778 || hash->elf.root.type == bfd_link_hash_undefined)
12779 {
12780 /* Recognise an old ABI func code entry sym, and
12781 use the func descriptor sym instead if it is
12782 defined. */
12783 if (hash->elf.root.root.string[0] == '.'
12784 && hash->oh != NULL)
12785 {
12786 fdh = ppc_follow_link (hash->oh);
12787 if (fdh->elf.root.type == bfd_link_hash_defined
12788 || fdh->elf.root.type == bfd_link_hash_defweak)
12789 {
12790 sym_sec = fdh->elf.root.u.def.section;
12791 sym_value = fdh->elf.root.u.def.value;
12792 if (sym_sec->output_section != NULL)
12793 ok_dest = TRUE;
12794 }
12795 else
12796 fdh = NULL;
12797 }
12798 }
12799 else
12800 {
12801 bfd_set_error (bfd_error_bad_value);
12802 goto error_ret_free_internal;
12803 }
12804
12805 destination = 0;
12806 local_off = 0;
12807 if (ok_dest)
12808 {
12809 sym_value += irela->r_addend;
12810 destination = (sym_value
12811 + sym_sec->output_offset
12812 + sym_sec->output_section->vma);
12813 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12814 ? hash->elf.other
12815 : sym->st_other);
12816 }
12817
12818 code_sec = sym_sec;
12819 code_value = sym_value;
12820 opd = get_opd_info (sym_sec);
12821 if (opd != NULL)
12822 {
12823 bfd_vma dest;
12824
12825 if (hash == NULL && opd->adjust != NULL)
12826 {
12827 long adjust = opd->adjust[OPD_NDX (sym_value)];
12828 if (adjust == -1)
12829 continue;
12830 code_value += adjust;
12831 sym_value += adjust;
12832 }
12833 dest = opd_entry_value (sym_sec, sym_value,
12834 &code_sec, &code_value, FALSE);
12835 if (dest != (bfd_vma) -1)
12836 {
12837 destination = dest;
12838 if (fdh != NULL)
12839 {
12840 /* Fixup old ABI sym to point at code
12841 entry. */
12842 hash->elf.root.type = bfd_link_hash_defweak;
12843 hash->elf.root.u.def.section = code_sec;
12844 hash->elf.root.u.def.value = code_value;
12845 }
12846 }
12847 }
12848
12849 /* Determine what (if any) linker stub is needed. */
12850 plt_ent = NULL;
12851 stub_type = ppc_type_of_stub (section, irela, &hash,
12852 &plt_ent, destination,
12853 local_off);
12854
12855 if (stub_type != ppc_stub_plt_call)
12856 {
12857 /* Check whether we need a TOC adjusting stub.
12858 Since the linker pastes together pieces from
12859 different object files when creating the
12860 _init and _fini functions, it may be that a
12861 call to what looks like a local sym is in
12862 fact a call needing a TOC adjustment. */
12863 if (code_sec != NULL
12864 && code_sec->output_section != NULL
12865 && (htab->sec_info[code_sec->id].toc_off
12866 != htab->sec_info[section->id].toc_off)
12867 && (code_sec->has_toc_reloc
12868 || code_sec->makes_toc_func_call))
12869 stub_type = ppc_stub_long_branch_r2off;
12870 }
12871
12872 if (stub_type == ppc_stub_none)
12873 continue;
12874
12875 /* __tls_get_addr calls might be eliminated. */
12876 if (stub_type != ppc_stub_plt_call
12877 && hash != NULL
12878 && (hash == htab->tls_get_addr
12879 || hash == htab->tls_get_addr_fd)
12880 && section->has_tls_reloc
12881 && irela != internal_relocs)
12882 {
12883 /* Get tls info. */
12884 unsigned char *tls_mask;
12885
12886 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12887 irela - 1, input_bfd))
12888 goto error_ret_free_internal;
12889 if ((*tls_mask & TLS_TLS) != 0)
12890 continue;
12891 }
12892
12893 if (stub_type == ppc_stub_plt_call)
12894 {
12895 if (!htab->opd_abi
12896 && htab->params->plt_localentry0 != 0
12897 && is_elfv2_localentry0 (&hash->elf))
12898 htab->has_plt_localentry0 = 1;
12899 else if (irela + 1 < irelaend
12900 && irela[1].r_offset == irela->r_offset + 4
12901 && (ELF64_R_TYPE (irela[1].r_info)
12902 == R_PPC64_TOCSAVE))
12903 {
12904 if (!tocsave_find (htab, INSERT,
12905 &local_syms, irela + 1, input_bfd))
12906 goto error_ret_free_internal;
12907 }
12908 else
12909 stub_type = ppc_stub_plt_call_r2save;
12910 }
12911
12912 /* Support for grouping stub sections. */
12913 id_sec = htab->sec_info[section->id].u.group->link_sec;
12914
12915 /* Get the name of this stub. */
12916 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12917 if (!stub_name)
12918 goto error_ret_free_internal;
12919
12920 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12921 stub_name, FALSE, FALSE);
12922 if (stub_entry != NULL)
12923 {
12924 /* The proper stub has already been created. */
12925 free (stub_name);
12926 if (stub_type == ppc_stub_plt_call_r2save)
12927 stub_entry->stub_type = stub_type;
12928 continue;
12929 }
12930
12931 stub_entry = ppc_add_stub (stub_name, section, info);
12932 if (stub_entry == NULL)
12933 {
12934 free (stub_name);
12935 error_ret_free_internal:
12936 if (elf_section_data (section)->relocs == NULL)
12937 free (internal_relocs);
12938 error_ret_free_local:
12939 if (local_syms != NULL
12940 && (symtab_hdr->contents
12941 != (unsigned char *) local_syms))
12942 free (local_syms);
12943 return FALSE;
12944 }
12945
12946 stub_entry->stub_type = stub_type;
12947 if (stub_type != ppc_stub_plt_call
12948 && stub_type != ppc_stub_plt_call_r2save)
12949 {
12950 stub_entry->target_value = code_value;
12951 stub_entry->target_section = code_sec;
12952 }
12953 else
12954 {
12955 stub_entry->target_value = sym_value;
12956 stub_entry->target_section = sym_sec;
12957 }
12958 stub_entry->h = hash;
12959 stub_entry->plt_ent = plt_ent;
12960 stub_entry->symtype
12961 = hash ? hash->elf.type : ELF_ST_TYPE (sym->st_info);
12962 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12963
12964 if (stub_entry->h != NULL)
12965 htab->stub_globals += 1;
12966 }
12967
12968 /* We're done with the internal relocs, free them. */
12969 if (elf_section_data (section)->relocs != internal_relocs)
12970 free (internal_relocs);
12971 }
12972
12973 if (local_syms != NULL
12974 && symtab_hdr->contents != (unsigned char *) local_syms)
12975 {
12976 if (!info->keep_memory)
12977 free (local_syms);
12978 else
12979 symtab_hdr->contents = (unsigned char *) local_syms;
12980 }
12981 }
12982
12983 /* We may have added some stubs. Find out the new size of the
12984 stub sections. */
12985 for (group = htab->group; group != NULL; group = group->next)
12986 if (group->stub_sec != NULL)
12987 {
12988 asection *stub_sec = group->stub_sec;
12989
12990 if (htab->stub_iteration <= STUB_SHRINK_ITER
12991 || stub_sec->rawsize < stub_sec->size)
12992 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12993 stub_sec->rawsize = stub_sec->size;
12994 stub_sec->size = 0;
12995 stub_sec->reloc_count = 0;
12996 stub_sec->flags &= ~SEC_RELOC;
12997 }
12998
12999 if (htab->stub_iteration <= STUB_SHRINK_ITER
13000 || htab->brlt->rawsize < htab->brlt->size)
13001 htab->brlt->rawsize = htab->brlt->size;
13002 htab->brlt->size = 0;
13003 htab->brlt->reloc_count = 0;
13004 htab->brlt->flags &= ~SEC_RELOC;
13005 if (htab->relbrlt != NULL)
13006 htab->relbrlt->size = 0;
13007
13008 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
13009
13010 for (group = htab->group; group != NULL; group = group->next)
13011 if (group->needs_save_res)
13012 group->stub_sec->size += htab->sfpr->size;
13013
13014 if (info->emitrelocations
13015 && htab->glink != NULL && htab->glink->size != 0)
13016 {
13017 htab->glink->reloc_count = 1;
13018 htab->glink->flags |= SEC_RELOC;
13019 }
13020
13021 if (htab->glink_eh_frame != NULL
13022 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
13023 && htab->glink_eh_frame->output_section->size > 8)
13024 {
13025 size_t size = 0, align = 4;
13026
13027 for (group = htab->group; group != NULL; group = group->next)
13028 if (group->stub_sec != NULL)
13029 size += stub_eh_frame_size (group, align);
13030 if (htab->glink != NULL && htab->glink->size != 0)
13031 size += (24 + align - 1) & -align;
13032 if (size != 0)
13033 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
13034 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
13035 size = (size + align - 1) & -align;
13036 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
13037 htab->glink_eh_frame->size = size;
13038 }
13039
13040 if (htab->params->plt_stub_align != 0)
13041 for (group = htab->group; group != NULL; group = group->next)
13042 if (group->stub_sec != NULL)
13043 {
13044 int align = abs (htab->params->plt_stub_align);
13045 group->stub_sec->size
13046 = (group->stub_sec->size + (1 << align) - 1) & -(1 << align);
13047 }
13048
13049 for (group = htab->group; group != NULL; group = group->next)
13050 if (group->stub_sec != NULL
13051 && group->stub_sec->rawsize != group->stub_sec->size
13052 && (htab->stub_iteration <= STUB_SHRINK_ITER
13053 || group->stub_sec->rawsize < group->stub_sec->size))
13054 break;
13055
13056 if (group == NULL
13057 && (htab->brlt->rawsize == htab->brlt->size
13058 || (htab->stub_iteration > STUB_SHRINK_ITER
13059 && htab->brlt->rawsize > htab->brlt->size))
13060 && (htab->glink_eh_frame == NULL
13061 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
13062 break;
13063
13064 /* Ask the linker to do its stuff. */
13065 (*htab->params->layout_sections_again) ();
13066 }
13067
13068 if (htab->glink_eh_frame != NULL
13069 && htab->glink_eh_frame->size != 0)
13070 {
13071 bfd_vma val;
13072 bfd_byte *p, *last_fde;
13073 size_t last_fde_len, size, align, pad;
13074 struct map_stub *group;
13075
13076 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
13077 if (p == NULL)
13078 return FALSE;
13079 htab->glink_eh_frame->contents = p;
13080 last_fde = p;
13081 align = 4;
13082
13083 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
13084 /* CIE length (rewrite in case little-endian). */
13085 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
13086 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
13087 p += last_fde_len + 4;
13088
13089 for (group = htab->group; group != NULL; group = group->next)
13090 if (group->stub_sec != NULL)
13091 {
13092 last_fde = p;
13093 last_fde_len = stub_eh_frame_size (group, align) - 4;
13094 /* FDE length. */
13095 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
13096 p += 4;
13097 /* CIE pointer. */
13098 val = p - htab->glink_eh_frame->contents;
13099 bfd_put_32 (htab->elf.dynobj, val, p);
13100 p += 4;
13101 /* Offset to stub section, written later. */
13102 p += 4;
13103 /* stub section size. */
13104 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
13105 p += 4;
13106 /* Augmentation. */
13107 p += 1;
13108 if (group->tls_get_addr_opt_bctrl != -1u)
13109 {
13110 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
13111
13112 /* This FDE needs more than just the default.
13113 Describe __tls_get_addr_opt stub LR. */
13114 if (to_bctrl < 64)
13115 *p++ = DW_CFA_advance_loc + to_bctrl;
13116 else if (to_bctrl < 256)
13117 {
13118 *p++ = DW_CFA_advance_loc1;
13119 *p++ = to_bctrl;
13120 }
13121 else if (to_bctrl < 65536)
13122 {
13123 *p++ = DW_CFA_advance_loc2;
13124 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
13125 p += 2;
13126 }
13127 else
13128 {
13129 *p++ = DW_CFA_advance_loc4;
13130 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
13131 p += 4;
13132 }
13133 *p++ = DW_CFA_offset_extended_sf;
13134 *p++ = 65;
13135 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
13136 *p++ = DW_CFA_advance_loc + 4;
13137 *p++ = DW_CFA_restore_extended;
13138 *p++ = 65;
13139 }
13140 /* Pad. */
13141 p = last_fde + last_fde_len + 4;
13142 }
13143 if (htab->glink != NULL && htab->glink->size != 0)
13144 {
13145 last_fde = p;
13146 last_fde_len = ((24 + align - 1) & -align) - 4;
13147 /* FDE length. */
13148 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
13149 p += 4;
13150 /* CIE pointer. */
13151 val = p - htab->glink_eh_frame->contents;
13152 bfd_put_32 (htab->elf.dynobj, val, p);
13153 p += 4;
13154 /* Offset to .glink, written later. */
13155 p += 4;
13156 /* .glink size. */
13157 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
13158 p += 4;
13159 /* Augmentation. */
13160 p += 1;
13161
13162 *p++ = DW_CFA_advance_loc + 1;
13163 *p++ = DW_CFA_register;
13164 *p++ = 65;
13165 *p++ = htab->opd_abi ? 12 : 0;
13166 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
13167 *p++ = DW_CFA_restore_extended;
13168 *p++ = 65;
13169 p += ((24 + align - 1) & -align) - 24;
13170 }
13171 /* Subsume any padding into the last FDE if user .eh_frame
13172 sections are aligned more than glink_eh_frame. Otherwise any
13173 zero padding will be seen as a terminator. */
13174 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
13175 size = p - htab->glink_eh_frame->contents;
13176 pad = ((size + align - 1) & -align) - size;
13177 htab->glink_eh_frame->size = size + pad;
13178 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
13179 }
13180
13181 maybe_strip_output (info, htab->brlt);
13182 if (htab->glink_eh_frame != NULL)
13183 maybe_strip_output (info, htab->glink_eh_frame);
13184
13185 return TRUE;
13186 }
13187
13188 /* Called after we have determined section placement. If sections
13189 move, we'll be called again. Provide a value for TOCstart. */
13190
13191 bfd_vma
13192 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
13193 {
13194 asection *s;
13195 bfd_vma TOCstart, adjust;
13196
13197 if (info != NULL)
13198 {
13199 struct elf_link_hash_entry *h;
13200 struct elf_link_hash_table *htab = elf_hash_table (info);
13201
13202 if (is_elf_hash_table (htab)
13203 && htab->hgot != NULL)
13204 h = htab->hgot;
13205 else
13206 {
13207 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
13208 if (is_elf_hash_table (htab))
13209 htab->hgot = h;
13210 }
13211 if (h != NULL
13212 && h->root.type == bfd_link_hash_defined
13213 && !h->root.linker_def
13214 && (!is_elf_hash_table (htab)
13215 || h->def_regular))
13216 {
13217 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
13218 + h->root.u.def.section->output_offset
13219 + h->root.u.def.section->output_section->vma);
13220 _bfd_set_gp_value (obfd, TOCstart);
13221 return TOCstart;
13222 }
13223 }
13224
13225 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
13226 order. The TOC starts where the first of these sections starts. */
13227 s = bfd_get_section_by_name (obfd, ".got");
13228 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13229 s = bfd_get_section_by_name (obfd, ".toc");
13230 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13231 s = bfd_get_section_by_name (obfd, ".tocbss");
13232 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13233 s = bfd_get_section_by_name (obfd, ".plt");
13234 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13235 {
13236 /* This may happen for
13237 o references to TOC base (SYM@toc / TOC[tc0]) without a
13238 .toc directive
13239 o bad linker script
13240 o --gc-sections and empty TOC sections
13241
13242 FIXME: Warn user? */
13243
13244 /* Look for a likely section. We probably won't even be
13245 using TOCstart. */
13246 for (s = obfd->sections; s != NULL; s = s->next)
13247 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
13248 | SEC_EXCLUDE))
13249 == (SEC_ALLOC | SEC_SMALL_DATA))
13250 break;
13251 if (s == NULL)
13252 for (s = obfd->sections; s != NULL; s = s->next)
13253 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
13254 == (SEC_ALLOC | SEC_SMALL_DATA))
13255 break;
13256 if (s == NULL)
13257 for (s = obfd->sections; s != NULL; s = s->next)
13258 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
13259 == SEC_ALLOC)
13260 break;
13261 if (s == NULL)
13262 for (s = obfd->sections; s != NULL; s = s->next)
13263 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
13264 break;
13265 }
13266
13267 TOCstart = 0;
13268 if (s != NULL)
13269 TOCstart = s->output_section->vma + s->output_offset;
13270
13271 /* Force alignment. */
13272 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
13273 TOCstart -= adjust;
13274 _bfd_set_gp_value (obfd, TOCstart);
13275
13276 if (info != NULL && s != NULL)
13277 {
13278 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13279
13280 if (htab != NULL)
13281 {
13282 if (htab->elf.hgot != NULL)
13283 {
13284 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
13285 htab->elf.hgot->root.u.def.section = s;
13286 }
13287 }
13288 else
13289 {
13290 struct bfd_link_hash_entry *bh = NULL;
13291 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
13292 s, TOC_BASE_OFF - adjust,
13293 NULL, FALSE, FALSE, &bh);
13294 }
13295 }
13296 return TOCstart;
13297 }
13298
13299 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
13300 write out any global entry stubs, and PLT relocations. */
13301
13302 static bfd_boolean
13303 build_global_entry_stubs_and_plt (struct elf_link_hash_entry *h, void *inf)
13304 {
13305 struct bfd_link_info *info;
13306 struct ppc_link_hash_table *htab;
13307 struct plt_entry *ent;
13308 asection *s;
13309
13310 if (h->root.type == bfd_link_hash_indirect)
13311 return TRUE;
13312
13313 info = inf;
13314 htab = ppc_hash_table (info);
13315 if (htab == NULL)
13316 return FALSE;
13317
13318 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13319 if (ent->plt.offset != (bfd_vma) -1)
13320 {
13321 /* This symbol has an entry in the procedure linkage
13322 table. Set it up. */
13323 Elf_Internal_Rela rela;
13324 asection *plt, *relplt;
13325 bfd_byte *loc;
13326
13327 if (!htab->elf.dynamic_sections_created
13328 || h->dynindx == -1)
13329 {
13330 if (!(h->def_regular
13331 && (h->root.type == bfd_link_hash_defined
13332 || h->root.type == bfd_link_hash_defweak)))
13333 continue;
13334 if (h->type == STT_GNU_IFUNC)
13335 {
13336 plt = htab->elf.iplt;
13337 relplt = htab->elf.irelplt;
13338 htab->local_ifunc_resolver = 1;
13339 if (htab->opd_abi)
13340 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13341 else
13342 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13343 }
13344 else
13345 {
13346 plt = htab->pltlocal;
13347 if (bfd_link_pic (info))
13348 {
13349 relplt = htab->relpltlocal;
13350 if (htab->opd_abi)
13351 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_SLOT);
13352 else
13353 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13354 }
13355 else
13356 relplt = NULL;
13357 }
13358 rela.r_addend = (h->root.u.def.value
13359 + h->root.u.def.section->output_offset
13360 + h->root.u.def.section->output_section->vma
13361 + ent->addend);
13362
13363 if (relplt == NULL)
13364 {
13365 loc = plt->contents + ent->plt.offset;
13366 bfd_put_64 (info->output_bfd, rela.r_addend, loc);
13367 if (htab->opd_abi)
13368 {
13369 bfd_vma toc = elf_gp (info->output_bfd);
13370 toc += htab->sec_info[h->root.u.def.section->id].toc_off;
13371 bfd_put_64 (info->output_bfd, toc, loc + 8);
13372 }
13373 }
13374 else
13375 {
13376 rela.r_offset = (plt->output_section->vma
13377 + plt->output_offset
13378 + ent->plt.offset);
13379 loc = relplt->contents + (relplt->reloc_count++
13380 * sizeof (Elf64_External_Rela));
13381 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc);
13382 }
13383 }
13384 else
13385 {
13386 rela.r_offset = (htab->elf.splt->output_section->vma
13387 + htab->elf.splt->output_offset
13388 + ent->plt.offset);
13389 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13390 rela.r_addend = ent->addend;
13391 loc = (htab->elf.srelplt->contents
13392 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
13393 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
13394 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
13395 htab->maybe_local_ifunc_resolver = 1;
13396 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc);
13397 }
13398 }
13399
13400 if (!h->pointer_equality_needed)
13401 return TRUE;
13402
13403 if (h->def_regular)
13404 return TRUE;
13405
13406 s = htab->global_entry;
13407 if (s == NULL || s->size == 0)
13408 return TRUE;
13409
13410 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13411 if (ent->plt.offset != (bfd_vma) -1
13412 && ent->addend == 0)
13413 {
13414 bfd_byte *p;
13415 asection *plt;
13416 bfd_vma off;
13417
13418 p = s->contents + h->root.u.def.value;
13419 plt = htab->elf.splt;
13420 if (!htab->elf.dynamic_sections_created
13421 || h->dynindx == -1)
13422 {
13423 if (h->type == STT_GNU_IFUNC)
13424 plt = htab->elf.iplt;
13425 else
13426 plt = htab->pltlocal;
13427 }
13428 off = ent->plt.offset + plt->output_offset + plt->output_section->vma;
13429 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13430
13431 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13432 {
13433 info->callbacks->einfo
13434 (_("%P: linkage table error against `%pT'\n"),
13435 h->root.root.string);
13436 bfd_set_error (bfd_error_bad_value);
13437 htab->stub_error = TRUE;
13438 }
13439
13440 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13441 if (htab->params->emit_stub_syms)
13442 {
13443 size_t len = strlen (h->root.root.string);
13444 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13445
13446 if (name == NULL)
13447 return FALSE;
13448
13449 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13450 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13451 if (h == NULL)
13452 return FALSE;
13453 if (h->root.type == bfd_link_hash_new)
13454 {
13455 h->root.type = bfd_link_hash_defined;
13456 h->root.u.def.section = s;
13457 h->root.u.def.value = p - s->contents;
13458 h->ref_regular = 1;
13459 h->def_regular = 1;
13460 h->ref_regular_nonweak = 1;
13461 h->forced_local = 1;
13462 h->non_elf = 0;
13463 h->root.linker_def = 1;
13464 }
13465 }
13466
13467 if (PPC_HA (off) != 0)
13468 {
13469 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13470 p += 4;
13471 }
13472 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13473 p += 4;
13474 bfd_put_32 (s->owner, MTCTR_R12, p);
13475 p += 4;
13476 bfd_put_32 (s->owner, BCTR, p);
13477 break;
13478 }
13479 return TRUE;
13480 }
13481
13482 /* Write PLT relocs for locals. */
13483
13484 static bfd_boolean
13485 write_plt_relocs_for_local_syms (struct bfd_link_info *info)
13486 {
13487 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13488 bfd *ibfd;
13489
13490 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
13491 {
13492 struct got_entry **lgot_ents, **end_lgot_ents;
13493 struct plt_entry **local_plt, **lplt, **end_local_plt;
13494 Elf_Internal_Shdr *symtab_hdr;
13495 bfd_size_type locsymcount;
13496 Elf_Internal_Sym *local_syms = NULL;
13497 struct plt_entry *ent;
13498
13499 if (!is_ppc64_elf (ibfd))
13500 continue;
13501
13502 lgot_ents = elf_local_got_ents (ibfd);
13503 if (!lgot_ents)
13504 continue;
13505
13506 symtab_hdr = &elf_symtab_hdr (ibfd);
13507 locsymcount = symtab_hdr->sh_info;
13508 end_lgot_ents = lgot_ents + locsymcount;
13509 local_plt = (struct plt_entry **) end_lgot_ents;
13510 end_local_plt = local_plt + locsymcount;
13511 for (lplt = local_plt; lplt < end_local_plt; ++lplt)
13512 for (ent = *lplt; ent != NULL; ent = ent->next)
13513 if (ent->plt.offset != (bfd_vma) -1)
13514 {
13515 Elf_Internal_Sym *sym;
13516 asection *sym_sec;
13517 asection *plt, *relplt;
13518 bfd_byte *loc;
13519 bfd_vma val;
13520
13521 if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms,
13522 lplt - local_plt, ibfd))
13523 {
13524 if (local_syms != NULL
13525 && symtab_hdr->contents != (unsigned char *) local_syms)
13526 free (local_syms);
13527 return FALSE;
13528 }
13529
13530 val = sym->st_value + ent->addend;
13531 val += PPC64_LOCAL_ENTRY_OFFSET (sym->st_other);
13532 if (sym_sec != NULL && sym_sec->output_section != NULL)
13533 val += sym_sec->output_offset + sym_sec->output_section->vma;
13534
13535 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13536 {
13537 htab->local_ifunc_resolver = 1;
13538 plt = htab->elf.iplt;
13539 relplt = htab->elf.irelplt;
13540 }
13541 else
13542 {
13543 plt = htab->pltlocal;
13544 relplt = bfd_link_pic (info) ? htab->relpltlocal : NULL;
13545 }
13546
13547 if (relplt == NULL)
13548 {
13549 loc = plt->contents + ent->plt.offset;
13550 bfd_put_64 (info->output_bfd, val, loc);
13551 if (htab->opd_abi)
13552 {
13553 bfd_vma toc = elf_gp (ibfd);
13554 bfd_put_64 (info->output_bfd, toc, loc + 8);
13555 }
13556 }
13557 else
13558 {
13559 Elf_Internal_Rela rela;
13560 rela.r_offset = (ent->plt.offset
13561 + plt->output_offset
13562 + plt->output_section->vma);
13563 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13564 {
13565 if (htab->opd_abi)
13566 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13567 else
13568 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13569 }
13570 else
13571 {
13572 if (htab->opd_abi)
13573 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_SLOT);
13574 else
13575 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13576 }
13577 rela.r_addend = val;
13578 loc = relplt->contents + (relplt->reloc_count++
13579 * sizeof (Elf64_External_Rela));
13580 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc);
13581 }
13582 }
13583
13584 if (local_syms != NULL
13585 && symtab_hdr->contents != (unsigned char *) local_syms)
13586 {
13587 if (!info->keep_memory)
13588 free (local_syms);
13589 else
13590 symtab_hdr->contents = (unsigned char *) local_syms;
13591 }
13592 }
13593 return TRUE;
13594 }
13595
13596 /* Build all the stubs associated with the current output file.
13597 The stubs are kept in a hash table attached to the main linker
13598 hash table. This function is called via gldelf64ppc_finish. */
13599
13600 bfd_boolean
13601 ppc64_elf_build_stubs (struct bfd_link_info *info,
13602 char **stats)
13603 {
13604 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13605 struct map_stub *group;
13606 asection *stub_sec;
13607 bfd_byte *p;
13608 int stub_sec_count = 0;
13609
13610 if (htab == NULL)
13611 return FALSE;
13612
13613 /* Allocate memory to hold the linker stubs. */
13614 for (group = htab->group; group != NULL; group = group->next)
13615 if ((stub_sec = group->stub_sec) != NULL
13616 && stub_sec->size != 0)
13617 {
13618 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13619 if (stub_sec->contents == NULL)
13620 return FALSE;
13621 stub_sec->size = 0;
13622 }
13623
13624 if (htab->glink != NULL && htab->glink->size != 0)
13625 {
13626 unsigned int indx;
13627 bfd_vma plt0;
13628
13629 /* Build the .glink plt call stub. */
13630 if (htab->params->emit_stub_syms)
13631 {
13632 struct elf_link_hash_entry *h;
13633 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13634 TRUE, FALSE, FALSE);
13635 if (h == NULL)
13636 return FALSE;
13637 if (h->root.type == bfd_link_hash_new)
13638 {
13639 h->root.type = bfd_link_hash_defined;
13640 h->root.u.def.section = htab->glink;
13641 h->root.u.def.value = 8;
13642 h->ref_regular = 1;
13643 h->def_regular = 1;
13644 h->ref_regular_nonweak = 1;
13645 h->forced_local = 1;
13646 h->non_elf = 0;
13647 h->root.linker_def = 1;
13648 }
13649 }
13650 plt0 = (htab->elf.splt->output_section->vma
13651 + htab->elf.splt->output_offset
13652 - 16);
13653 if (info->emitrelocations)
13654 {
13655 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13656 if (r == NULL)
13657 return FALSE;
13658 r->r_offset = (htab->glink->output_offset
13659 + htab->glink->output_section->vma);
13660 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13661 r->r_addend = plt0;
13662 }
13663 p = htab->glink->contents;
13664 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13665 bfd_put_64 (htab->glink->owner, plt0, p);
13666 p += 8;
13667 if (htab->opd_abi)
13668 {
13669 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13670 p += 4;
13671 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13672 p += 4;
13673 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13674 p += 4;
13675 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13676 p += 4;
13677 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13678 p += 4;
13679 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13680 p += 4;
13681 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13682 p += 4;
13683 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13684 p += 4;
13685 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13686 p += 4;
13687 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13688 p += 4;
13689 }
13690 else
13691 {
13692 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13693 p += 4;
13694 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13695 p += 4;
13696 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13697 p += 4;
13698 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13699 p += 4;
13700 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13701 p += 4;
13702 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13703 p += 4;
13704 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13705 p += 4;
13706 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13707 p += 4;
13708 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13709 p += 4;
13710 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13711 p += 4;
13712 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13713 p += 4;
13714 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13715 p += 4;
13716 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13717 p += 4;
13718 }
13719 bfd_put_32 (htab->glink->owner, BCTR, p);
13720 p += 4;
13721 BFD_ASSERT (p == htab->glink->contents + GLINK_PLTRESOLVE_SIZE (htab));
13722
13723 /* Build the .glink lazy link call stubs. */
13724 indx = 0;
13725 while (p < htab->glink->contents + htab->glink->size)
13726 {
13727 if (htab->opd_abi)
13728 {
13729 if (indx < 0x8000)
13730 {
13731 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13732 p += 4;
13733 }
13734 else
13735 {
13736 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13737 p += 4;
13738 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13739 p);
13740 p += 4;
13741 }
13742 }
13743 bfd_put_32 (htab->glink->owner,
13744 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13745 indx++;
13746 p += 4;
13747 }
13748 }
13749
13750 /* Build .glink global entry stubs, and PLT relocs for globals. */
13751 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs_and_plt, info);
13752
13753 if (!write_plt_relocs_for_local_syms (info))
13754 return FALSE;
13755
13756 if (htab->brlt != NULL && htab->brlt->size != 0)
13757 {
13758 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13759 htab->brlt->size);
13760 if (htab->brlt->contents == NULL)
13761 return FALSE;
13762 }
13763 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13764 {
13765 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13766 htab->relbrlt->size);
13767 if (htab->relbrlt->contents == NULL)
13768 return FALSE;
13769 }
13770
13771 /* Build the stubs as directed by the stub hash table. */
13772 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13773
13774 for (group = htab->group; group != NULL; group = group->next)
13775 if (group->needs_save_res)
13776 group->stub_sec->size += htab->sfpr->size;
13777
13778 if (htab->relbrlt != NULL)
13779 htab->relbrlt->reloc_count = 0;
13780
13781 if (htab->params->plt_stub_align != 0)
13782 for (group = htab->group; group != NULL; group = group->next)
13783 if ((stub_sec = group->stub_sec) != NULL)
13784 {
13785 int align = abs (htab->params->plt_stub_align);
13786 stub_sec->size = (stub_sec->size + (1 << align) - 1) & -(1 << align);
13787 }
13788
13789 for (group = htab->group; group != NULL; group = group->next)
13790 if (group->needs_save_res)
13791 {
13792 stub_sec = group->stub_sec;
13793 memcpy (stub_sec->contents + stub_sec->size - htab->sfpr->size,
13794 htab->sfpr->contents, htab->sfpr->size);
13795 if (htab->params->emit_stub_syms)
13796 {
13797 unsigned int i;
13798
13799 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13800 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13801 return FALSE;
13802 }
13803 }
13804
13805 for (group = htab->group; group != NULL; group = group->next)
13806 if ((stub_sec = group->stub_sec) != NULL)
13807 {
13808 stub_sec_count += 1;
13809 if (stub_sec->rawsize != stub_sec->size
13810 && (htab->stub_iteration <= STUB_SHRINK_ITER
13811 || stub_sec->rawsize < stub_sec->size))
13812 break;
13813 }
13814
13815 if (group != NULL)
13816 {
13817 htab->stub_error = TRUE;
13818 _bfd_error_handler (_("stubs don't match calculated size"));
13819 }
13820
13821 if (htab->stub_error)
13822 return FALSE;
13823
13824 if (stats != NULL)
13825 {
13826 size_t len;
13827 *stats = bfd_malloc (500);
13828 if (*stats == NULL)
13829 return FALSE;
13830
13831 len = sprintf (*stats,
13832 ngettext ("linker stubs in %u group\n",
13833 "linker stubs in %u groups\n",
13834 stub_sec_count),
13835 stub_sec_count);
13836 sprintf (*stats + len, _(" branch %lu\n"
13837 " toc adjust %lu\n"
13838 " long branch %lu\n"
13839 " long toc adj %lu\n"
13840 " plt call %lu\n"
13841 " plt call toc %lu\n"
13842 " global entry %lu"),
13843 htab->stub_count[ppc_stub_long_branch - 1],
13844 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13845 htab->stub_count[ppc_stub_plt_branch - 1],
13846 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13847 htab->stub_count[ppc_stub_plt_call - 1],
13848 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13849 htab->stub_count[ppc_stub_global_entry - 1]);
13850 }
13851 return TRUE;
13852 }
13853
13854 /* What to do when ld finds relocations against symbols defined in
13855 discarded sections. */
13856
13857 static unsigned int
13858 ppc64_elf_action_discarded (asection *sec)
13859 {
13860 if (strcmp (".opd", sec->name) == 0)
13861 return 0;
13862
13863 if (strcmp (".toc", sec->name) == 0)
13864 return 0;
13865
13866 if (strcmp (".toc1", sec->name) == 0)
13867 return 0;
13868
13869 return _bfd_elf_default_action_discarded (sec);
13870 }
13871
13872 /* The RELOCATE_SECTION function is called by the ELF backend linker
13873 to handle the relocations for a section.
13874
13875 The relocs are always passed as Rela structures; if the section
13876 actually uses Rel structures, the r_addend field will always be
13877 zero.
13878
13879 This function is responsible for adjust the section contents as
13880 necessary, and (if using Rela relocs and generating a
13881 relocatable output file) adjusting the reloc addend as
13882 necessary.
13883
13884 This function does not have to worry about setting the reloc
13885 address or the reloc symbol index.
13886
13887 LOCAL_SYMS is a pointer to the swapped in local symbols.
13888
13889 LOCAL_SECTIONS is an array giving the section in the input file
13890 corresponding to the st_shndx field of each local symbol.
13891
13892 The global hash table entry for the global symbols can be found
13893 via elf_sym_hashes (input_bfd).
13894
13895 When generating relocatable output, this function must handle
13896 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13897 going to be the section symbol corresponding to the output
13898 section, which means that the addend must be adjusted
13899 accordingly. */
13900
13901 static bfd_boolean
13902 ppc64_elf_relocate_section (bfd *output_bfd,
13903 struct bfd_link_info *info,
13904 bfd *input_bfd,
13905 asection *input_section,
13906 bfd_byte *contents,
13907 Elf_Internal_Rela *relocs,
13908 Elf_Internal_Sym *local_syms,
13909 asection **local_sections)
13910 {
13911 struct ppc_link_hash_table *htab;
13912 Elf_Internal_Shdr *symtab_hdr;
13913 struct elf_link_hash_entry **sym_hashes;
13914 Elf_Internal_Rela *rel;
13915 Elf_Internal_Rela *wrel;
13916 Elf_Internal_Rela *relend;
13917 Elf_Internal_Rela outrel;
13918 bfd_byte *loc;
13919 struct got_entry **local_got_ents;
13920 bfd_vma TOCstart;
13921 bfd_boolean ret = TRUE;
13922 bfd_boolean is_opd;
13923 /* Assume 'at' branch hints. */
13924 bfd_boolean is_isa_v2 = TRUE;
13925 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13926
13927 /* Initialize howto table if needed. */
13928 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13929 ppc_howto_init ();
13930
13931 htab = ppc_hash_table (info);
13932 if (htab == NULL)
13933 return FALSE;
13934
13935 /* Don't relocate stub sections. */
13936 if (input_section->owner == htab->params->stub_bfd)
13937 return TRUE;
13938
13939 BFD_ASSERT (is_ppc64_elf (input_bfd));
13940
13941 local_got_ents = elf_local_got_ents (input_bfd);
13942 TOCstart = elf_gp (output_bfd);
13943 symtab_hdr = &elf_symtab_hdr (input_bfd);
13944 sym_hashes = elf_sym_hashes (input_bfd);
13945 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13946
13947 rel = wrel = relocs;
13948 relend = relocs + input_section->reloc_count;
13949 for (; rel < relend; wrel++, rel++)
13950 {
13951 enum elf_ppc64_reloc_type r_type;
13952 bfd_vma addend;
13953 bfd_reloc_status_type r;
13954 Elf_Internal_Sym *sym;
13955 asection *sec;
13956 struct elf_link_hash_entry *h_elf;
13957 struct ppc_link_hash_entry *h;
13958 struct ppc_link_hash_entry *fdh;
13959 const char *sym_name;
13960 unsigned long r_symndx, toc_symndx;
13961 bfd_vma toc_addend;
13962 unsigned char tls_mask, tls_gd, tls_type;
13963 unsigned char sym_type;
13964 bfd_vma relocation;
13965 bfd_boolean unresolved_reloc, save_unresolved_reloc;
13966 bfd_boolean warned;
13967 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13968 unsigned int insn;
13969 unsigned int mask;
13970 struct ppc_stub_hash_entry *stub_entry;
13971 bfd_vma max_br_offset;
13972 bfd_vma from;
13973 Elf_Internal_Rela orig_rel;
13974 reloc_howto_type *howto;
13975 struct reloc_howto_struct alt_howto;
13976
13977 again:
13978 orig_rel = *rel;
13979
13980 r_type = ELF64_R_TYPE (rel->r_info);
13981 r_symndx = ELF64_R_SYM (rel->r_info);
13982
13983 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13984 symbol of the previous ADDR64 reloc. The symbol gives us the
13985 proper TOC base to use. */
13986 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13987 && wrel != relocs
13988 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13989 && is_opd)
13990 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13991
13992 sym = NULL;
13993 sec = NULL;
13994 h_elf = NULL;
13995 sym_name = NULL;
13996 unresolved_reloc = FALSE;
13997 warned = FALSE;
13998
13999 if (r_symndx < symtab_hdr->sh_info)
14000 {
14001 /* It's a local symbol. */
14002 struct _opd_sec_data *opd;
14003
14004 sym = local_syms + r_symndx;
14005 sec = local_sections[r_symndx];
14006 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
14007 sym_type = ELF64_ST_TYPE (sym->st_info);
14008 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
14009 opd = get_opd_info (sec);
14010 if (opd != NULL && opd->adjust != NULL)
14011 {
14012 long adjust = opd->adjust[OPD_NDX (sym->st_value
14013 + rel->r_addend)];
14014 if (adjust == -1)
14015 relocation = 0;
14016 else
14017 {
14018 /* If this is a relocation against the opd section sym
14019 and we have edited .opd, adjust the reloc addend so
14020 that ld -r and ld --emit-relocs output is correct.
14021 If it is a reloc against some other .opd symbol,
14022 then the symbol value will be adjusted later. */
14023 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
14024 rel->r_addend += adjust;
14025 else
14026 relocation += adjust;
14027 }
14028 }
14029 }
14030 else
14031 {
14032 bfd_boolean ignored;
14033
14034 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
14035 r_symndx, symtab_hdr, sym_hashes,
14036 h_elf, sec, relocation,
14037 unresolved_reloc, warned, ignored);
14038 sym_name = h_elf->root.root.string;
14039 sym_type = h_elf->type;
14040 if (sec != NULL
14041 && sec->owner == output_bfd
14042 && strcmp (sec->name, ".opd") == 0)
14043 {
14044 /* This is a symbol defined in a linker script. All
14045 such are defined in output sections, even those
14046 defined by simple assignment from a symbol defined in
14047 an input section. Transfer the symbol to an
14048 appropriate input .opd section, so that a branch to
14049 this symbol will be mapped to the location specified
14050 by the opd entry. */
14051 struct bfd_link_order *lo;
14052 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
14053 if (lo->type == bfd_indirect_link_order)
14054 {
14055 asection *isec = lo->u.indirect.section;
14056 if (h_elf->root.u.def.value >= isec->output_offset
14057 && h_elf->root.u.def.value < (isec->output_offset
14058 + isec->size))
14059 {
14060 h_elf->root.u.def.value -= isec->output_offset;
14061 h_elf->root.u.def.section = isec;
14062 sec = isec;
14063 break;
14064 }
14065 }
14066 }
14067 }
14068 h = (struct ppc_link_hash_entry *) h_elf;
14069
14070 if (sec != NULL && discarded_section (sec))
14071 {
14072 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
14073 input_bfd, input_section,
14074 contents + rel->r_offset);
14075 wrel->r_offset = rel->r_offset;
14076 wrel->r_info = 0;
14077 wrel->r_addend = 0;
14078
14079 /* For ld -r, remove relocations in debug sections against
14080 symbols defined in discarded sections. Not done for
14081 non-debug to preserve relocs in .eh_frame which the
14082 eh_frame editing code expects to be present. */
14083 if (bfd_link_relocatable (info)
14084 && (input_section->flags & SEC_DEBUGGING))
14085 wrel--;
14086
14087 continue;
14088 }
14089
14090 if (bfd_link_relocatable (info))
14091 goto copy_reloc;
14092
14093 if (h != NULL && &h->elf == htab->elf.hgot)
14094 {
14095 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14096 sec = bfd_abs_section_ptr;
14097 unresolved_reloc = FALSE;
14098 }
14099
14100 /* TLS optimizations. Replace instruction sequences and relocs
14101 based on information we collected in tls_optimize. We edit
14102 RELOCS so that --emit-relocs will output something sensible
14103 for the final instruction stream. */
14104 tls_mask = 0;
14105 tls_gd = 0;
14106 toc_symndx = 0;
14107 if (h != NULL)
14108 tls_mask = h->tls_mask;
14109 else if (local_got_ents != NULL)
14110 {
14111 struct plt_entry **local_plt = (struct plt_entry **)
14112 (local_got_ents + symtab_hdr->sh_info);
14113 unsigned char *lgot_masks = (unsigned char *)
14114 (local_plt + symtab_hdr->sh_info);
14115 tls_mask = lgot_masks[r_symndx];
14116 }
14117 if (((tls_mask & TLS_TLS) == 0 || tls_mask == (TLS_TLS | TLS_MARK))
14118 && (r_type == R_PPC64_TLS
14119 || r_type == R_PPC64_TLSGD
14120 || r_type == R_PPC64_TLSLD))
14121 {
14122 /* Check for toc tls entries. */
14123 unsigned char *toc_tls;
14124
14125 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
14126 &local_syms, rel, input_bfd))
14127 return FALSE;
14128
14129 if (toc_tls)
14130 tls_mask = *toc_tls;
14131 }
14132
14133 /* Check that tls relocs are used with tls syms, and non-tls
14134 relocs are used with non-tls syms. */
14135 if (r_symndx != STN_UNDEF
14136 && r_type != R_PPC64_NONE
14137 && (h == NULL
14138 || h->elf.root.type == bfd_link_hash_defined
14139 || h->elf.root.type == bfd_link_hash_defweak)
14140 && (IS_PPC64_TLS_RELOC (r_type)
14141 != (sym_type == STT_TLS
14142 || (sym_type == STT_SECTION
14143 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
14144 {
14145 if ((tls_mask & TLS_TLS) != 0
14146 && (r_type == R_PPC64_TLS
14147 || r_type == R_PPC64_TLSGD
14148 || r_type == R_PPC64_TLSLD))
14149 /* R_PPC64_TLS is OK against a symbol in the TOC. */
14150 ;
14151 else
14152 info->callbacks->einfo
14153 (!IS_PPC64_TLS_RELOC (r_type)
14154 /* xgettext:c-format */
14155 ? _("%H: %s used with TLS symbol `%pT'\n")
14156 /* xgettext:c-format */
14157 : _("%H: %s used with non-TLS symbol `%pT'\n"),
14158 input_bfd, input_section, rel->r_offset,
14159 ppc64_elf_howto_table[r_type]->name,
14160 sym_name);
14161 }
14162
14163 /* Ensure reloc mapping code below stays sane. */
14164 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
14165 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
14166 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
14167 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
14168 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
14169 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
14170 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
14171 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
14172 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
14173 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
14174 abort ();
14175
14176 switch (r_type)
14177 {
14178 default:
14179 break;
14180
14181 case R_PPC64_LO_DS_OPT:
14182 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
14183 if ((insn & (0x3f << 26)) != 58u << 26)
14184 abort ();
14185 insn += (14u << 26) - (58u << 26);
14186 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
14187 r_type = R_PPC64_TOC16_LO;
14188 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14189 break;
14190
14191 case R_PPC64_TOC16:
14192 case R_PPC64_TOC16_LO:
14193 case R_PPC64_TOC16_DS:
14194 case R_PPC64_TOC16_LO_DS:
14195 {
14196 /* Check for toc tls entries. */
14197 unsigned char *toc_tls;
14198 int retval;
14199
14200 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
14201 &local_syms, rel, input_bfd);
14202 if (retval == 0)
14203 return FALSE;
14204
14205 if (toc_tls)
14206 {
14207 tls_mask = *toc_tls;
14208 if (r_type == R_PPC64_TOC16_DS
14209 || r_type == R_PPC64_TOC16_LO_DS)
14210 {
14211 if ((tls_mask & TLS_TLS) != 0
14212 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
14213 goto toctprel;
14214 }
14215 else
14216 {
14217 /* If we found a GD reloc pair, then we might be
14218 doing a GD->IE transition. */
14219 if (retval == 2)
14220 {
14221 tls_gd = TLS_TPRELGD;
14222 if ((tls_mask & TLS_TLS) != 0
14223 && (tls_mask & TLS_GD) == 0)
14224 goto tls_ldgd_opt;
14225 }
14226 else if (retval == 3)
14227 {
14228 if ((tls_mask & TLS_TLS) != 0
14229 && (tls_mask & TLS_LD) == 0)
14230 goto tls_ldgd_opt;
14231 }
14232 }
14233 }
14234 }
14235 break;
14236
14237 case R_PPC64_GOT_TPREL16_HI:
14238 case R_PPC64_GOT_TPREL16_HA:
14239 if ((tls_mask & TLS_TLS) != 0
14240 && (tls_mask & TLS_TPREL) == 0)
14241 {
14242 rel->r_offset -= d_offset;
14243 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14244 r_type = R_PPC64_NONE;
14245 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14246 }
14247 break;
14248
14249 case R_PPC64_GOT_TPREL16_DS:
14250 case R_PPC64_GOT_TPREL16_LO_DS:
14251 if ((tls_mask & TLS_TLS) != 0
14252 && (tls_mask & TLS_TPREL) == 0)
14253 {
14254 toctprel:
14255 insn = bfd_get_32 (input_bfd,
14256 contents + rel->r_offset - d_offset);
14257 insn &= 31 << 21;
14258 insn |= 0x3c0d0000; /* addis 0,13,0 */
14259 bfd_put_32 (input_bfd, insn,
14260 contents + rel->r_offset - d_offset);
14261 r_type = R_PPC64_TPREL16_HA;
14262 if (toc_symndx != 0)
14263 {
14264 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
14265 rel->r_addend = toc_addend;
14266 /* We changed the symbol. Start over in order to
14267 get h, sym, sec etc. right. */
14268 goto again;
14269 }
14270 else
14271 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14272 }
14273 break;
14274
14275 case R_PPC64_TLS:
14276 if ((tls_mask & TLS_TLS) != 0
14277 && (tls_mask & TLS_TPREL) == 0)
14278 {
14279 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14280 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
14281 if (insn == 0)
14282 abort ();
14283 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14284 /* Was PPC64_TLS which sits on insn boundary, now
14285 PPC64_TPREL16_LO which is at low-order half-word. */
14286 rel->r_offset += d_offset;
14287 r_type = R_PPC64_TPREL16_LO;
14288 if (toc_symndx != 0)
14289 {
14290 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
14291 rel->r_addend = toc_addend;
14292 /* We changed the symbol. Start over in order to
14293 get h, sym, sec etc. right. */
14294 goto again;
14295 }
14296 else
14297 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14298 }
14299 break;
14300
14301 case R_PPC64_GOT_TLSGD16_HI:
14302 case R_PPC64_GOT_TLSGD16_HA:
14303 tls_gd = TLS_TPRELGD;
14304 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
14305 goto tls_gdld_hi;
14306 break;
14307
14308 case R_PPC64_GOT_TLSLD16_HI:
14309 case R_PPC64_GOT_TLSLD16_HA:
14310 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
14311 {
14312 tls_gdld_hi:
14313 if ((tls_mask & tls_gd) != 0)
14314 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
14315 + R_PPC64_GOT_TPREL16_DS);
14316 else
14317 {
14318 rel->r_offset -= d_offset;
14319 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14320 r_type = R_PPC64_NONE;
14321 }
14322 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14323 }
14324 break;
14325
14326 case R_PPC64_GOT_TLSGD16:
14327 case R_PPC64_GOT_TLSGD16_LO:
14328 tls_gd = TLS_TPRELGD;
14329 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
14330 goto tls_ldgd_opt;
14331 break;
14332
14333 case R_PPC64_GOT_TLSLD16:
14334 case R_PPC64_GOT_TLSLD16_LO:
14335 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
14336 {
14337 unsigned int insn1, insn2;
14338 bfd_vma offset;
14339
14340 tls_ldgd_opt:
14341 offset = (bfd_vma) -1;
14342 /* If not using the newer R_PPC64_TLSGD/LD to mark
14343 __tls_get_addr calls, we must trust that the call
14344 stays with its arg setup insns, ie. that the next
14345 reloc is the __tls_get_addr call associated with
14346 the current reloc. Edit both insns. */
14347 if (input_section->has_tls_get_addr_call
14348 && rel + 1 < relend
14349 && branch_reloc_hash_match (input_bfd, rel + 1,
14350 htab->tls_get_addr,
14351 htab->tls_get_addr_fd))
14352 offset = rel[1].r_offset;
14353 /* We read the low GOT_TLS (or TOC16) insn because we
14354 need to keep the destination reg. It may be
14355 something other than the usual r3, and moved to r3
14356 before the call by intervening code. */
14357 insn1 = bfd_get_32 (input_bfd,
14358 contents + rel->r_offset - d_offset);
14359 if ((tls_mask & tls_gd) != 0)
14360 {
14361 /* IE */
14362 insn1 &= (0x1f << 21) | (0x1f << 16);
14363 insn1 |= 58 << 26; /* ld */
14364 insn2 = 0x7c636a14; /* add 3,3,13 */
14365 if (offset != (bfd_vma) -1)
14366 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14367 if ((tls_mask & TLS_EXPLICIT) == 0)
14368 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
14369 + R_PPC64_GOT_TPREL16_DS);
14370 else
14371 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
14372 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14373 }
14374 else
14375 {
14376 /* LE */
14377 insn1 &= 0x1f << 21;
14378 insn1 |= 0x3c0d0000; /* addis r,13,0 */
14379 insn2 = 0x38630000; /* addi 3,3,0 */
14380 if (tls_gd == 0)
14381 {
14382 /* Was an LD reloc. */
14383 if (toc_symndx)
14384 sec = local_sections[toc_symndx];
14385 for (r_symndx = 0;
14386 r_symndx < symtab_hdr->sh_info;
14387 r_symndx++)
14388 if (local_sections[r_symndx] == sec)
14389 break;
14390 if (r_symndx >= symtab_hdr->sh_info)
14391 r_symndx = STN_UNDEF;
14392 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14393 if (r_symndx != STN_UNDEF)
14394 rel->r_addend -= (local_syms[r_symndx].st_value
14395 + sec->output_offset
14396 + sec->output_section->vma);
14397 }
14398 else if (toc_symndx != 0)
14399 {
14400 r_symndx = toc_symndx;
14401 rel->r_addend = toc_addend;
14402 }
14403 r_type = R_PPC64_TPREL16_HA;
14404 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14405 if (offset != (bfd_vma) -1)
14406 {
14407 rel[1].r_info = ELF64_R_INFO (r_symndx,
14408 R_PPC64_TPREL16_LO);
14409 rel[1].r_offset = offset + d_offset;
14410 rel[1].r_addend = rel->r_addend;
14411 }
14412 }
14413 bfd_put_32 (input_bfd, insn1,
14414 contents + rel->r_offset - d_offset);
14415 if (offset != (bfd_vma) -1)
14416 bfd_put_32 (input_bfd, insn2, contents + offset);
14417 if ((tls_mask & tls_gd) == 0
14418 && (tls_gd == 0 || toc_symndx != 0))
14419 {
14420 /* We changed the symbol. Start over in order
14421 to get h, sym, sec etc. right. */
14422 goto again;
14423 }
14424 }
14425 break;
14426
14427 case R_PPC64_TLSGD:
14428 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
14429 && rel + 1 < relend)
14430 {
14431 unsigned int insn2;
14432 bfd_vma offset = rel->r_offset;
14433
14434 if (is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info)))
14435 {
14436 bfd_put_32 (output_bfd, NOP, contents + offset);
14437 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14438 break;
14439 }
14440
14441 if (ELF64_R_TYPE (rel[1].r_info) == R_PPC64_PLTCALL)
14442 bfd_put_32 (output_bfd, NOP, contents + offset + 4);
14443
14444 if ((tls_mask & TLS_TPRELGD) != 0)
14445 {
14446 /* IE */
14447 r_type = R_PPC64_NONE;
14448 insn2 = 0x7c636a14; /* add 3,3,13 */
14449 }
14450 else
14451 {
14452 /* LE */
14453 if (toc_symndx != 0)
14454 {
14455 r_symndx = toc_symndx;
14456 rel->r_addend = toc_addend;
14457 }
14458 r_type = R_PPC64_TPREL16_LO;
14459 rel->r_offset = offset + d_offset;
14460 insn2 = 0x38630000; /* addi 3,3,0 */
14461 }
14462 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14463 /* Zap the reloc on the _tls_get_addr call too. */
14464 BFD_ASSERT (offset == rel[1].r_offset);
14465 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14466 bfd_put_32 (input_bfd, insn2, contents + offset);
14467 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
14468 goto again;
14469 }
14470 break;
14471
14472 case R_PPC64_TLSLD:
14473 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
14474 && rel + 1 < relend)
14475 {
14476 unsigned int insn2;
14477 bfd_vma offset = rel->r_offset;
14478
14479 if (is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info)))
14480 {
14481 bfd_put_32 (output_bfd, NOP, contents + offset);
14482 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14483 break;
14484 }
14485
14486 if (ELF64_R_TYPE (rel[1].r_info) == R_PPC64_PLTCALL)
14487 bfd_put_32 (output_bfd, NOP, contents + offset + 4);
14488
14489 if (toc_symndx)
14490 sec = local_sections[toc_symndx];
14491 for (r_symndx = 0;
14492 r_symndx < symtab_hdr->sh_info;
14493 r_symndx++)
14494 if (local_sections[r_symndx] == sec)
14495 break;
14496 if (r_symndx >= symtab_hdr->sh_info)
14497 r_symndx = STN_UNDEF;
14498 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14499 if (r_symndx != STN_UNDEF)
14500 rel->r_addend -= (local_syms[r_symndx].st_value
14501 + sec->output_offset
14502 + sec->output_section->vma);
14503
14504 r_type = R_PPC64_TPREL16_LO;
14505 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14506 rel->r_offset = offset + d_offset;
14507 /* Zap the reloc on the _tls_get_addr call too. */
14508 BFD_ASSERT (offset == rel[1].r_offset);
14509 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14510 insn2 = 0x38630000; /* addi 3,3,0 */
14511 bfd_put_32 (input_bfd, insn2, contents + offset);
14512 goto again;
14513 }
14514 break;
14515
14516 case R_PPC64_DTPMOD64:
14517 if (rel + 1 < relend
14518 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
14519 && rel[1].r_offset == rel->r_offset + 8)
14520 {
14521 if ((tls_mask & TLS_GD) == 0)
14522 {
14523 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
14524 if ((tls_mask & TLS_TPRELGD) != 0)
14525 r_type = R_PPC64_TPREL64;
14526 else
14527 {
14528 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14529 r_type = R_PPC64_NONE;
14530 }
14531 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14532 }
14533 }
14534 else
14535 {
14536 if ((tls_mask & TLS_LD) == 0)
14537 {
14538 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14539 r_type = R_PPC64_NONE;
14540 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14541 }
14542 }
14543 break;
14544
14545 case R_PPC64_TPREL64:
14546 if ((tls_mask & TLS_TPREL) == 0)
14547 {
14548 r_type = R_PPC64_NONE;
14549 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14550 }
14551 break;
14552
14553 case R_PPC64_ENTRY:
14554 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14555 if (!bfd_link_pic (info)
14556 && !info->traditional_format
14557 && relocation + 0x80008000 <= 0xffffffff)
14558 {
14559 unsigned int insn1, insn2;
14560
14561 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14562 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14563 if ((insn1 & ~0xfffc) == LD_R2_0R12
14564 && insn2 == ADD_R2_R2_R12)
14565 {
14566 bfd_put_32 (input_bfd,
14567 LIS_R2 + PPC_HA (relocation),
14568 contents + rel->r_offset);
14569 bfd_put_32 (input_bfd,
14570 ADDI_R2_R2 + PPC_LO (relocation),
14571 contents + rel->r_offset + 4);
14572 }
14573 }
14574 else
14575 {
14576 relocation -= (rel->r_offset
14577 + input_section->output_offset
14578 + input_section->output_section->vma);
14579 if (relocation + 0x80008000 <= 0xffffffff)
14580 {
14581 unsigned int insn1, insn2;
14582
14583 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14584 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14585 if ((insn1 & ~0xfffc) == LD_R2_0R12
14586 && insn2 == ADD_R2_R2_R12)
14587 {
14588 bfd_put_32 (input_bfd,
14589 ADDIS_R2_R12 + PPC_HA (relocation),
14590 contents + rel->r_offset);
14591 bfd_put_32 (input_bfd,
14592 ADDI_R2_R2 + PPC_LO (relocation),
14593 contents + rel->r_offset + 4);
14594 }
14595 }
14596 }
14597 break;
14598
14599 case R_PPC64_REL16_HA:
14600 /* If we are generating a non-PIC executable, edit
14601 . 0: addis 2,12,.TOC.-0b@ha
14602 . addi 2,2,.TOC.-0b@l
14603 used by ELFv2 global entry points to set up r2, to
14604 . lis 2,.TOC.@ha
14605 . addi 2,2,.TOC.@l
14606 if .TOC. is in range. */
14607 if (!bfd_link_pic (info)
14608 && !info->traditional_format
14609 && !htab->opd_abi
14610 && rel->r_addend == d_offset
14611 && h != NULL && &h->elf == htab->elf.hgot
14612 && rel + 1 < relend
14613 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14614 && rel[1].r_offset == rel->r_offset + 4
14615 && rel[1].r_addend == rel->r_addend + 4
14616 && relocation + 0x80008000 <= 0xffffffff)
14617 {
14618 unsigned int insn1, insn2;
14619 bfd_vma offset = rel->r_offset - d_offset;
14620 insn1 = bfd_get_32 (input_bfd, contents + offset);
14621 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14622 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14623 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14624 {
14625 r_type = R_PPC64_ADDR16_HA;
14626 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14627 rel->r_addend -= d_offset;
14628 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14629 rel[1].r_addend -= d_offset + 4;
14630 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14631 }
14632 }
14633 break;
14634 }
14635
14636 /* Handle other relocations that tweak non-addend part of insn. */
14637 insn = 0;
14638 max_br_offset = 1 << 25;
14639 addend = rel->r_addend;
14640 reloc_dest = DEST_NORMAL;
14641 switch (r_type)
14642 {
14643 default:
14644 break;
14645
14646 case R_PPC64_TOCSAVE:
14647 if (relocation + addend == (rel->r_offset
14648 + input_section->output_offset
14649 + input_section->output_section->vma)
14650 && tocsave_find (htab, NO_INSERT,
14651 &local_syms, rel, input_bfd))
14652 {
14653 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14654 if (insn == NOP
14655 || insn == CROR_151515 || insn == CROR_313131)
14656 bfd_put_32 (input_bfd,
14657 STD_R2_0R1 + STK_TOC (htab),
14658 contents + rel->r_offset);
14659 }
14660 break;
14661
14662 /* Branch taken prediction relocations. */
14663 case R_PPC64_ADDR14_BRTAKEN:
14664 case R_PPC64_REL14_BRTAKEN:
14665 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14666 /* Fall through. */
14667
14668 /* Branch not taken prediction relocations. */
14669 case R_PPC64_ADDR14_BRNTAKEN:
14670 case R_PPC64_REL14_BRNTAKEN:
14671 insn |= bfd_get_32 (input_bfd,
14672 contents + rel->r_offset) & ~(0x01 << 21);
14673 /* Fall through. */
14674
14675 case R_PPC64_REL14:
14676 max_br_offset = 1 << 15;
14677 /* Fall through. */
14678
14679 case R_PPC64_REL24:
14680 case R_PPC64_PLTCALL:
14681 /* Calls to functions with a different TOC, such as calls to
14682 shared objects, need to alter the TOC pointer. This is
14683 done using a linkage stub. A REL24 branching to these
14684 linkage stubs needs to be followed by a nop, as the nop
14685 will be replaced with an instruction to restore the TOC
14686 base pointer. */
14687 fdh = h;
14688 if (h != NULL
14689 && h->oh != NULL
14690 && h->oh->is_func_descriptor)
14691 fdh = ppc_follow_link (h->oh);
14692 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14693 htab);
14694 if (r_type == R_PPC64_PLTCALL
14695 && stub_entry != NULL
14696 && (stub_entry->stub_type == ppc_stub_plt_call
14697 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14698 stub_entry = NULL;
14699
14700 if (stub_entry != NULL
14701 && (stub_entry->stub_type == ppc_stub_plt_call
14702 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14703 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14704 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14705 {
14706 bfd_boolean can_plt_call = FALSE;
14707
14708 if (stub_entry->stub_type == ppc_stub_plt_call
14709 && !htab->opd_abi
14710 && htab->params->plt_localentry0 != 0
14711 && is_elfv2_localentry0 (&h->elf))
14712 {
14713 /* The function doesn't use or change r2. */
14714 can_plt_call = TRUE;
14715 }
14716
14717 /* All of these stubs may modify r2, so there must be a
14718 branch and link followed by a nop. The nop is
14719 replaced by an insn to restore r2. */
14720 else if (rel->r_offset + 8 <= input_section->size)
14721 {
14722 unsigned long br;
14723
14724 br = bfd_get_32 (input_bfd,
14725 contents + rel->r_offset);
14726 if ((br & 1) != 0)
14727 {
14728 unsigned long nop;
14729
14730 nop = bfd_get_32 (input_bfd,
14731 contents + rel->r_offset + 4);
14732 if (nop == LD_R2_0R1 + STK_TOC (htab))
14733 can_plt_call = TRUE;
14734 else if (nop == NOP
14735 || nop == CROR_151515
14736 || nop == CROR_313131)
14737 {
14738 if (h != NULL
14739 && (h == htab->tls_get_addr_fd
14740 || h == htab->tls_get_addr)
14741 && htab->params->tls_get_addr_opt)
14742 {
14743 /* Special stub used, leave nop alone. */
14744 }
14745 else
14746 bfd_put_32 (input_bfd,
14747 LD_R2_0R1 + STK_TOC (htab),
14748 contents + rel->r_offset + 4);
14749 can_plt_call = TRUE;
14750 }
14751 }
14752 }
14753
14754 if (!can_plt_call && h != NULL)
14755 {
14756 const char *name = h->elf.root.root.string;
14757
14758 if (*name == '.')
14759 ++name;
14760
14761 if (strncmp (name, "__libc_start_main", 17) == 0
14762 && (name[17] == 0 || name[17] == '@'))
14763 {
14764 /* Allow crt1 branch to go via a toc adjusting
14765 stub. Other calls that never return could do
14766 the same, if we could detect such. */
14767 can_plt_call = TRUE;
14768 }
14769 }
14770
14771 if (!can_plt_call)
14772 {
14773 /* g++ as of 20130507 emits self-calls without a
14774 following nop. This is arguably wrong since we
14775 have conflicting information. On the one hand a
14776 global symbol and on the other a local call
14777 sequence, but don't error for this special case.
14778 It isn't possible to cheaply verify we have
14779 exactly such a call. Allow all calls to the same
14780 section. */
14781 asection *code_sec = sec;
14782
14783 if (get_opd_info (sec) != NULL)
14784 {
14785 bfd_vma off = (relocation + addend
14786 - sec->output_section->vma
14787 - sec->output_offset);
14788
14789 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14790 }
14791 if (code_sec == input_section)
14792 can_plt_call = TRUE;
14793 }
14794
14795 if (!can_plt_call)
14796 {
14797 if (stub_entry->stub_type == ppc_stub_plt_call
14798 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14799 info->callbacks->einfo
14800 /* xgettext:c-format */
14801 (_("%H: call to `%pT' lacks nop, can't restore toc; "
14802 "recompile with -fPIC\n"),
14803 input_bfd, input_section, rel->r_offset, sym_name);
14804 else
14805 info->callbacks->einfo
14806 /* xgettext:c-format */
14807 (_("%H: call to `%pT' lacks nop, can't restore toc; "
14808 "(-mcmodel=small toc adjust stub)\n"),
14809 input_bfd, input_section, rel->r_offset, sym_name);
14810
14811 bfd_set_error (bfd_error_bad_value);
14812 ret = FALSE;
14813 }
14814
14815 if (can_plt_call
14816 && (stub_entry->stub_type == ppc_stub_plt_call
14817 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14818 unresolved_reloc = FALSE;
14819 }
14820
14821 if ((stub_entry == NULL
14822 || stub_entry->stub_type == ppc_stub_long_branch
14823 || stub_entry->stub_type == ppc_stub_plt_branch)
14824 && get_opd_info (sec) != NULL)
14825 {
14826 /* The branch destination is the value of the opd entry. */
14827 bfd_vma off = (relocation + addend
14828 - sec->output_section->vma
14829 - sec->output_offset);
14830 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14831 if (dest != (bfd_vma) -1)
14832 {
14833 relocation = dest;
14834 addend = 0;
14835 reloc_dest = DEST_OPD;
14836 }
14837 }
14838
14839 /* If the branch is out of reach we ought to have a long
14840 branch stub. */
14841 from = (rel->r_offset
14842 + input_section->output_offset
14843 + input_section->output_section->vma);
14844
14845 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14846 ? fdh->elf.other
14847 : sym->st_other);
14848
14849 if (stub_entry != NULL
14850 && (stub_entry->stub_type == ppc_stub_long_branch
14851 || stub_entry->stub_type == ppc_stub_plt_branch)
14852 && (r_type == R_PPC64_ADDR14_BRTAKEN
14853 || r_type == R_PPC64_ADDR14_BRNTAKEN
14854 || (relocation + addend - from + max_br_offset
14855 < 2 * max_br_offset)))
14856 /* Don't use the stub if this branch is in range. */
14857 stub_entry = NULL;
14858
14859 if (stub_entry != NULL)
14860 {
14861 /* Munge up the value and addend so that we call the stub
14862 rather than the procedure directly. */
14863 asection *stub_sec = stub_entry->group->stub_sec;
14864
14865 if (stub_entry->stub_type == ppc_stub_save_res)
14866 relocation += (stub_sec->output_offset
14867 + stub_sec->output_section->vma
14868 + stub_sec->size - htab->sfpr->size
14869 - htab->sfpr->output_offset
14870 - htab->sfpr->output_section->vma);
14871 else
14872 relocation = (stub_entry->stub_offset
14873 + stub_sec->output_offset
14874 + stub_sec->output_section->vma);
14875 addend = 0;
14876 reloc_dest = DEST_STUB;
14877
14878 if ((stub_entry->stub_type == ppc_stub_plt_call
14879 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14880 && (ALWAYS_EMIT_R2SAVE
14881 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14882 && rel + 1 < relend
14883 && rel[1].r_offset == rel->r_offset + 4
14884 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14885 relocation += 4;
14886 }
14887
14888 if (insn != 0)
14889 {
14890 if (is_isa_v2)
14891 {
14892 /* Set 'a' bit. This is 0b00010 in BO field for branch
14893 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14894 for branch on CTR insns (BO == 1a00t or 1a01t). */
14895 if ((insn & (0x14 << 21)) == (0x04 << 21))
14896 insn |= 0x02 << 21;
14897 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14898 insn |= 0x08 << 21;
14899 else
14900 break;
14901 }
14902 else
14903 {
14904 /* Invert 'y' bit if not the default. */
14905 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14906 insn ^= 0x01 << 21;
14907 }
14908
14909 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14910 }
14911
14912 /* NOP out calls to undefined weak functions.
14913 We can thus call a weak function without first
14914 checking whether the function is defined. */
14915 else if (h != NULL
14916 && h->elf.root.type == bfd_link_hash_undefweak
14917 && h->elf.dynindx == -1
14918 && r_type == R_PPC64_REL24
14919 && relocation == 0
14920 && addend == 0)
14921 {
14922 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14923 goto copy_reloc;
14924 }
14925 break;
14926 }
14927
14928 /* Set `addend'. */
14929 tls_type = 0;
14930 save_unresolved_reloc = unresolved_reloc;
14931 switch (r_type)
14932 {
14933 default:
14934 /* xgettext:c-format */
14935 _bfd_error_handler (_("%pB: %s unsupported"),
14936 input_bfd, ppc64_elf_howto_table[r_type]->name);
14937
14938 bfd_set_error (bfd_error_bad_value);
14939 ret = FALSE;
14940 goto copy_reloc;
14941
14942 case R_PPC64_NONE:
14943 case R_PPC64_TLS:
14944 case R_PPC64_TLSGD:
14945 case R_PPC64_TLSLD:
14946 case R_PPC64_TOCSAVE:
14947 case R_PPC64_GNU_VTINHERIT:
14948 case R_PPC64_GNU_VTENTRY:
14949 case R_PPC64_ENTRY:
14950 goto copy_reloc;
14951
14952 /* GOT16 relocations. Like an ADDR16 using the symbol's
14953 address in the GOT as relocation value instead of the
14954 symbol's value itself. Also, create a GOT entry for the
14955 symbol and put the symbol value there. */
14956 case R_PPC64_GOT_TLSGD16:
14957 case R_PPC64_GOT_TLSGD16_LO:
14958 case R_PPC64_GOT_TLSGD16_HI:
14959 case R_PPC64_GOT_TLSGD16_HA:
14960 tls_type = TLS_TLS | TLS_GD;
14961 goto dogot;
14962
14963 case R_PPC64_GOT_TLSLD16:
14964 case R_PPC64_GOT_TLSLD16_LO:
14965 case R_PPC64_GOT_TLSLD16_HI:
14966 case R_PPC64_GOT_TLSLD16_HA:
14967 tls_type = TLS_TLS | TLS_LD;
14968 goto dogot;
14969
14970 case R_PPC64_GOT_TPREL16_DS:
14971 case R_PPC64_GOT_TPREL16_LO_DS:
14972 case R_PPC64_GOT_TPREL16_HI:
14973 case R_PPC64_GOT_TPREL16_HA:
14974 tls_type = TLS_TLS | TLS_TPREL;
14975 goto dogot;
14976
14977 case R_PPC64_GOT_DTPREL16_DS:
14978 case R_PPC64_GOT_DTPREL16_LO_DS:
14979 case R_PPC64_GOT_DTPREL16_HI:
14980 case R_PPC64_GOT_DTPREL16_HA:
14981 tls_type = TLS_TLS | TLS_DTPREL;
14982 goto dogot;
14983
14984 case R_PPC64_GOT16:
14985 case R_PPC64_GOT16_LO:
14986 case R_PPC64_GOT16_HI:
14987 case R_PPC64_GOT16_HA:
14988 case R_PPC64_GOT16_DS:
14989 case R_PPC64_GOT16_LO_DS:
14990 dogot:
14991 {
14992 /* Relocation is to the entry for this symbol in the global
14993 offset table. */
14994 asection *got;
14995 bfd_vma *offp;
14996 bfd_vma off;
14997 unsigned long indx = 0;
14998 struct got_entry *ent;
14999
15000 if (tls_type == (TLS_TLS | TLS_LD)
15001 && (h == NULL
15002 || !h->elf.def_dynamic))
15003 ent = ppc64_tlsld_got (input_bfd);
15004 else
15005 {
15006 if (h != NULL)
15007 {
15008 if (!htab->elf.dynamic_sections_created
15009 || h->elf.dynindx == -1
15010 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
15011 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
15012 /* This is actually a static link, or it is a
15013 -Bsymbolic link and the symbol is defined
15014 locally, or the symbol was forced to be local
15015 because of a version file. */
15016 ;
15017 else
15018 {
15019 indx = h->elf.dynindx;
15020 unresolved_reloc = FALSE;
15021 }
15022 ent = h->elf.got.glist;
15023 }
15024 else
15025 {
15026 if (local_got_ents == NULL)
15027 abort ();
15028 ent = local_got_ents[r_symndx];
15029 }
15030
15031 for (; ent != NULL; ent = ent->next)
15032 if (ent->addend == orig_rel.r_addend
15033 && ent->owner == input_bfd
15034 && ent->tls_type == tls_type)
15035 break;
15036 }
15037
15038 if (ent == NULL)
15039 abort ();
15040 if (ent->is_indirect)
15041 ent = ent->got.ent;
15042 offp = &ent->got.offset;
15043 got = ppc64_elf_tdata (ent->owner)->got;
15044 if (got == NULL)
15045 abort ();
15046
15047 /* The offset must always be a multiple of 8. We use the
15048 least significant bit to record whether we have already
15049 processed this entry. */
15050 off = *offp;
15051 if ((off & 1) != 0)
15052 off &= ~1;
15053 else
15054 {
15055 /* Generate relocs for the dynamic linker, except in
15056 the case of TLSLD where we'll use one entry per
15057 module. */
15058 asection *relgot;
15059 bfd_boolean ifunc;
15060
15061 *offp = off | 1;
15062 relgot = NULL;
15063 ifunc = (h != NULL
15064 ? h->elf.type == STT_GNU_IFUNC
15065 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
15066 if (ifunc)
15067 {
15068 relgot = htab->elf.irelplt;
15069 if (indx == 0)
15070 htab->local_ifunc_resolver = 1;
15071 else if (is_static_defined (&h->elf))
15072 htab->maybe_local_ifunc_resolver = 1;
15073 }
15074 else if (indx != 0
15075 || (bfd_link_pic (info)
15076 && (h == NULL
15077 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
15078 || (tls_type == (TLS_TLS | TLS_LD)
15079 && !h->elf.def_dynamic))
15080 && !(tls_type == (TLS_TLS | TLS_TPREL)
15081 && bfd_link_executable (info)
15082 && SYMBOL_REFERENCES_LOCAL (info, &h->elf))))
15083 relgot = ppc64_elf_tdata (ent->owner)->relgot;
15084 if (relgot != NULL)
15085 {
15086 outrel.r_offset = (got->output_section->vma
15087 + got->output_offset
15088 + off);
15089 outrel.r_addend = addend;
15090 if (tls_type & (TLS_LD | TLS_GD))
15091 {
15092 outrel.r_addend = 0;
15093 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
15094 if (tls_type == (TLS_TLS | TLS_GD))
15095 {
15096 loc = relgot->contents;
15097 loc += (relgot->reloc_count++
15098 * sizeof (Elf64_External_Rela));
15099 bfd_elf64_swap_reloca_out (output_bfd,
15100 &outrel, loc);
15101 outrel.r_offset += 8;
15102 outrel.r_addend = addend;
15103 outrel.r_info
15104 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
15105 }
15106 }
15107 else if (tls_type == (TLS_TLS | TLS_DTPREL))
15108 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
15109 else if (tls_type == (TLS_TLS | TLS_TPREL))
15110 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
15111 else if (indx != 0)
15112 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
15113 else
15114 {
15115 if (ifunc)
15116 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15117 else
15118 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
15119
15120 /* Write the .got section contents for the sake
15121 of prelink. */
15122 loc = got->contents + off;
15123 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
15124 loc);
15125 }
15126
15127 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
15128 {
15129 outrel.r_addend += relocation;
15130 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
15131 {
15132 if (htab->elf.tls_sec == NULL)
15133 outrel.r_addend = 0;
15134 else
15135 outrel.r_addend -= htab->elf.tls_sec->vma;
15136 }
15137 }
15138 loc = relgot->contents;
15139 loc += (relgot->reloc_count++
15140 * sizeof (Elf64_External_Rela));
15141 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15142 }
15143
15144 /* Init the .got section contents here if we're not
15145 emitting a reloc. */
15146 else
15147 {
15148 relocation += addend;
15149 if (tls_type != 0)
15150 {
15151 if (htab->elf.tls_sec == NULL)
15152 relocation = 0;
15153 else
15154 {
15155 if (tls_type & TLS_LD)
15156 relocation = 0;
15157 else
15158 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
15159 if (tls_type & TLS_TPREL)
15160 relocation += DTP_OFFSET - TP_OFFSET;
15161 }
15162
15163 if (tls_type & (TLS_GD | TLS_LD))
15164 {
15165 bfd_put_64 (output_bfd, relocation,
15166 got->contents + off + 8);
15167 relocation = 1;
15168 }
15169 }
15170 bfd_put_64 (output_bfd, relocation,
15171 got->contents + off);
15172 }
15173 }
15174
15175 if (off >= (bfd_vma) -2)
15176 abort ();
15177
15178 relocation = got->output_section->vma + got->output_offset + off;
15179 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
15180 }
15181 break;
15182
15183 case R_PPC64_PLT16_HA:
15184 case R_PPC64_PLT16_HI:
15185 case R_PPC64_PLT16_LO:
15186 case R_PPC64_PLT16_LO_DS:
15187 case R_PPC64_PLT32:
15188 case R_PPC64_PLT64:
15189 case R_PPC64_PLTSEQ:
15190 case R_PPC64_PLTCALL:
15191 /* Relocation is to the entry for this symbol in the
15192 procedure linkage table. */
15193 unresolved_reloc = TRUE;
15194 {
15195 struct plt_entry **plt_list = NULL;
15196 if (h != NULL)
15197 plt_list = &h->elf.plt.plist;
15198 else if (local_got_ents != NULL)
15199 {
15200 struct plt_entry **local_plt = (struct plt_entry **)
15201 (local_got_ents + symtab_hdr->sh_info);
15202 plt_list = local_plt + r_symndx;
15203 }
15204 if (plt_list)
15205 {
15206 struct plt_entry *ent;
15207
15208 for (ent = *plt_list; ent != NULL; ent = ent->next)
15209 if (ent->plt.offset != (bfd_vma) -1
15210 && ent->addend == orig_rel.r_addend)
15211 {
15212 asection *plt;
15213 bfd_vma got;
15214
15215 plt = htab->elf.splt;
15216 if (!htab->elf.dynamic_sections_created
15217 || h == NULL
15218 || h->elf.dynindx == -1)
15219 {
15220 if (h != NULL
15221 ? h->elf.type == STT_GNU_IFUNC
15222 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15223 plt = htab->elf.iplt;
15224 else
15225 plt = htab->pltlocal;
15226 }
15227 relocation = (plt->output_section->vma
15228 + plt->output_offset
15229 + ent->plt.offset);
15230 if (r_type == R_PPC64_PLT16_HA
15231 || r_type ==R_PPC64_PLT16_HI
15232 || r_type ==R_PPC64_PLT16_LO
15233 || r_type ==R_PPC64_PLT16_LO_DS)
15234 {
15235 got = (elf_gp (output_bfd)
15236 + htab->sec_info[input_section->id].toc_off);
15237 relocation -= got;
15238 }
15239 addend = 0;
15240 unresolved_reloc = FALSE;
15241 break;
15242 }
15243 }
15244 }
15245 break;
15246
15247 case R_PPC64_TOC:
15248 /* Relocation value is TOC base. */
15249 relocation = TOCstart;
15250 if (r_symndx == STN_UNDEF)
15251 relocation += htab->sec_info[input_section->id].toc_off;
15252 else if (unresolved_reloc)
15253 ;
15254 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
15255 relocation += htab->sec_info[sec->id].toc_off;
15256 else
15257 unresolved_reloc = TRUE;
15258 goto dodyn;
15259
15260 /* TOC16 relocs. We want the offset relative to the TOC base,
15261 which is the address of the start of the TOC plus 0x8000.
15262 The TOC consists of sections .got, .toc, .tocbss, and .plt,
15263 in this order. */
15264 case R_PPC64_TOC16:
15265 case R_PPC64_TOC16_LO:
15266 case R_PPC64_TOC16_HI:
15267 case R_PPC64_TOC16_DS:
15268 case R_PPC64_TOC16_LO_DS:
15269 case R_PPC64_TOC16_HA:
15270 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
15271 break;
15272
15273 /* Relocate against the beginning of the section. */
15274 case R_PPC64_SECTOFF:
15275 case R_PPC64_SECTOFF_LO:
15276 case R_PPC64_SECTOFF_HI:
15277 case R_PPC64_SECTOFF_DS:
15278 case R_PPC64_SECTOFF_LO_DS:
15279 case R_PPC64_SECTOFF_HA:
15280 if (sec != NULL)
15281 addend -= sec->output_section->vma;
15282 break;
15283
15284 case R_PPC64_REL16:
15285 case R_PPC64_REL16_LO:
15286 case R_PPC64_REL16_HI:
15287 case R_PPC64_REL16_HA:
15288 case R_PPC64_REL16DX_HA:
15289 break;
15290
15291 case R_PPC64_REL14:
15292 case R_PPC64_REL14_BRNTAKEN:
15293 case R_PPC64_REL14_BRTAKEN:
15294 case R_PPC64_REL24:
15295 break;
15296
15297 case R_PPC64_TPREL16:
15298 case R_PPC64_TPREL16_LO:
15299 case R_PPC64_TPREL16_HI:
15300 case R_PPC64_TPREL16_HA:
15301 case R_PPC64_TPREL16_DS:
15302 case R_PPC64_TPREL16_LO_DS:
15303 case R_PPC64_TPREL16_HIGH:
15304 case R_PPC64_TPREL16_HIGHA:
15305 case R_PPC64_TPREL16_HIGHER:
15306 case R_PPC64_TPREL16_HIGHERA:
15307 case R_PPC64_TPREL16_HIGHEST:
15308 case R_PPC64_TPREL16_HIGHESTA:
15309 if (h != NULL
15310 && h->elf.root.type == bfd_link_hash_undefweak
15311 && h->elf.dynindx == -1)
15312 {
15313 /* Make this relocation against an undefined weak symbol
15314 resolve to zero. This is really just a tweak, since
15315 code using weak externs ought to check that they are
15316 defined before using them. */
15317 bfd_byte *p = contents + rel->r_offset - d_offset;
15318
15319 insn = bfd_get_32 (input_bfd, p);
15320 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
15321 if (insn != 0)
15322 bfd_put_32 (input_bfd, insn, p);
15323 break;
15324 }
15325 if (htab->elf.tls_sec != NULL)
15326 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
15327 /* The TPREL16 relocs shouldn't really be used in shared
15328 libs or with non-local symbols as that will result in
15329 DT_TEXTREL being set, but support them anyway. */
15330 goto dodyn;
15331
15332 case R_PPC64_DTPREL16:
15333 case R_PPC64_DTPREL16_LO:
15334 case R_PPC64_DTPREL16_HI:
15335 case R_PPC64_DTPREL16_HA:
15336 case R_PPC64_DTPREL16_DS:
15337 case R_PPC64_DTPREL16_LO_DS:
15338 case R_PPC64_DTPREL16_HIGH:
15339 case R_PPC64_DTPREL16_HIGHA:
15340 case R_PPC64_DTPREL16_HIGHER:
15341 case R_PPC64_DTPREL16_HIGHERA:
15342 case R_PPC64_DTPREL16_HIGHEST:
15343 case R_PPC64_DTPREL16_HIGHESTA:
15344 if (htab->elf.tls_sec != NULL)
15345 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
15346 break;
15347
15348 case R_PPC64_ADDR64_LOCAL:
15349 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
15350 ? h->elf.other
15351 : sym->st_other);
15352 break;
15353
15354 case R_PPC64_DTPMOD64:
15355 relocation = 1;
15356 addend = 0;
15357 goto dodyn;
15358
15359 case R_PPC64_TPREL64:
15360 if (htab->elf.tls_sec != NULL)
15361 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
15362 goto dodyn;
15363
15364 case R_PPC64_DTPREL64:
15365 if (htab->elf.tls_sec != NULL)
15366 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
15367 /* Fall through. */
15368
15369 /* Relocations that may need to be propagated if this is a
15370 dynamic object. */
15371 case R_PPC64_REL30:
15372 case R_PPC64_REL32:
15373 case R_PPC64_REL64:
15374 case R_PPC64_ADDR14:
15375 case R_PPC64_ADDR14_BRNTAKEN:
15376 case R_PPC64_ADDR14_BRTAKEN:
15377 case R_PPC64_ADDR16:
15378 case R_PPC64_ADDR16_DS:
15379 case R_PPC64_ADDR16_HA:
15380 case R_PPC64_ADDR16_HI:
15381 case R_PPC64_ADDR16_HIGH:
15382 case R_PPC64_ADDR16_HIGHA:
15383 case R_PPC64_ADDR16_HIGHER:
15384 case R_PPC64_ADDR16_HIGHERA:
15385 case R_PPC64_ADDR16_HIGHEST:
15386 case R_PPC64_ADDR16_HIGHESTA:
15387 case R_PPC64_ADDR16_LO:
15388 case R_PPC64_ADDR16_LO_DS:
15389 case R_PPC64_ADDR24:
15390 case R_PPC64_ADDR32:
15391 case R_PPC64_ADDR64:
15392 case R_PPC64_UADDR16:
15393 case R_PPC64_UADDR32:
15394 case R_PPC64_UADDR64:
15395 dodyn:
15396 if ((input_section->flags & SEC_ALLOC) == 0)
15397 break;
15398
15399 if (NO_OPD_RELOCS && is_opd)
15400 break;
15401
15402 if (bfd_link_pic (info)
15403 ? ((h == NULL
15404 || h->dyn_relocs != NULL)
15405 && ((h != NULL && pc_dynrelocs (h))
15406 || must_be_dyn_reloc (info, r_type)))
15407 : (h != NULL
15408 ? h->dyn_relocs != NULL
15409 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
15410 {
15411 bfd_boolean skip, relocate;
15412 asection *sreloc;
15413 bfd_vma out_off;
15414 long indx = 0;
15415
15416 /* When generating a dynamic object, these relocations
15417 are copied into the output file to be resolved at run
15418 time. */
15419
15420 skip = FALSE;
15421 relocate = FALSE;
15422
15423 out_off = _bfd_elf_section_offset (output_bfd, info,
15424 input_section, rel->r_offset);
15425 if (out_off == (bfd_vma) -1)
15426 skip = TRUE;
15427 else if (out_off == (bfd_vma) -2)
15428 skip = TRUE, relocate = TRUE;
15429 out_off += (input_section->output_section->vma
15430 + input_section->output_offset);
15431 outrel.r_offset = out_off;
15432 outrel.r_addend = rel->r_addend;
15433
15434 /* Optimize unaligned reloc use. */
15435 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
15436 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
15437 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
15438 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
15439 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
15440 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
15441 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
15442 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
15443 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
15444
15445 if (skip)
15446 memset (&outrel, 0, sizeof outrel);
15447 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
15448 && !is_opd
15449 && r_type != R_PPC64_TOC)
15450 {
15451 indx = h->elf.dynindx;
15452 BFD_ASSERT (indx != -1);
15453 outrel.r_info = ELF64_R_INFO (indx, r_type);
15454 }
15455 else
15456 {
15457 /* This symbol is local, or marked to become local,
15458 or this is an opd section reloc which must point
15459 at a local function. */
15460 outrel.r_addend += relocation;
15461 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
15462 {
15463 if (is_opd && h != NULL)
15464 {
15465 /* Lie about opd entries. This case occurs
15466 when building shared libraries and we
15467 reference a function in another shared
15468 lib. The same thing happens for a weak
15469 definition in an application that's
15470 overridden by a strong definition in a
15471 shared lib. (I believe this is a generic
15472 bug in binutils handling of weak syms.)
15473 In these cases we won't use the opd
15474 entry in this lib. */
15475 unresolved_reloc = FALSE;
15476 }
15477 if (!is_opd
15478 && r_type == R_PPC64_ADDR64
15479 && (h != NULL
15480 ? h->elf.type == STT_GNU_IFUNC
15481 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
15482 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15483 else
15484 {
15485 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
15486
15487 /* We need to relocate .opd contents for ld.so.
15488 Prelink also wants simple and consistent rules
15489 for relocs. This make all RELATIVE relocs have
15490 *r_offset equal to r_addend. */
15491 relocate = TRUE;
15492 }
15493 }
15494 else
15495 {
15496 if (h != NULL
15497 ? h->elf.type == STT_GNU_IFUNC
15498 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15499 {
15500 info->callbacks->einfo
15501 /* xgettext:c-format */
15502 (_("%H: %s for indirect "
15503 "function `%pT' unsupported\n"),
15504 input_bfd, input_section, rel->r_offset,
15505 ppc64_elf_howto_table[r_type]->name,
15506 sym_name);
15507 ret = FALSE;
15508 }
15509 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
15510 ;
15511 else if (sec == NULL || sec->owner == NULL)
15512 {
15513 bfd_set_error (bfd_error_bad_value);
15514 return FALSE;
15515 }
15516 else
15517 {
15518 asection *osec;
15519
15520 osec = sec->output_section;
15521 indx = elf_section_data (osec)->dynindx;
15522
15523 if (indx == 0)
15524 {
15525 if ((osec->flags & SEC_READONLY) == 0
15526 && htab->elf.data_index_section != NULL)
15527 osec = htab->elf.data_index_section;
15528 else
15529 osec = htab->elf.text_index_section;
15530 indx = elf_section_data (osec)->dynindx;
15531 }
15532 BFD_ASSERT (indx != 0);
15533
15534 /* We are turning this relocation into one
15535 against a section symbol, so subtract out
15536 the output section's address but not the
15537 offset of the input section in the output
15538 section. */
15539 outrel.r_addend -= osec->vma;
15540 }
15541
15542 outrel.r_info = ELF64_R_INFO (indx, r_type);
15543 }
15544 }
15545
15546 sreloc = elf_section_data (input_section)->sreloc;
15547 if (h != NULL
15548 ? h->elf.type == STT_GNU_IFUNC
15549 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15550 {
15551 sreloc = htab->elf.irelplt;
15552 if (indx == 0)
15553 htab->local_ifunc_resolver = 1;
15554 else if (is_static_defined (&h->elf))
15555 htab->maybe_local_ifunc_resolver = 1;
15556 }
15557 if (sreloc == NULL)
15558 abort ();
15559
15560 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15561 >= sreloc->size)
15562 abort ();
15563 loc = sreloc->contents;
15564 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15565 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15566
15567 /* If this reloc is against an external symbol, it will
15568 be computed at runtime, so there's no need to do
15569 anything now. However, for the sake of prelink ensure
15570 that the section contents are a known value. */
15571 if (! relocate)
15572 {
15573 unresolved_reloc = FALSE;
15574 /* The value chosen here is quite arbitrary as ld.so
15575 ignores section contents except for the special
15576 case of .opd where the contents might be accessed
15577 before relocation. Choose zero, as that won't
15578 cause reloc overflow. */
15579 relocation = 0;
15580 addend = 0;
15581 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15582 to improve backward compatibility with older
15583 versions of ld. */
15584 if (r_type == R_PPC64_ADDR64)
15585 addend = outrel.r_addend;
15586 /* Adjust pc_relative relocs to have zero in *r_offset. */
15587 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15588 addend = outrel.r_offset;
15589 }
15590 }
15591 break;
15592
15593 case R_PPC64_COPY:
15594 case R_PPC64_GLOB_DAT:
15595 case R_PPC64_JMP_SLOT:
15596 case R_PPC64_JMP_IREL:
15597 case R_PPC64_RELATIVE:
15598 /* We shouldn't ever see these dynamic relocs in relocatable
15599 files. */
15600 /* Fall through. */
15601
15602 case R_PPC64_PLTGOT16:
15603 case R_PPC64_PLTGOT16_DS:
15604 case R_PPC64_PLTGOT16_HA:
15605 case R_PPC64_PLTGOT16_HI:
15606 case R_PPC64_PLTGOT16_LO:
15607 case R_PPC64_PLTGOT16_LO_DS:
15608 case R_PPC64_PLTREL32:
15609 case R_PPC64_PLTREL64:
15610 /* These ones haven't been implemented yet. */
15611
15612 info->callbacks->einfo
15613 /* xgettext:c-format */
15614 (_("%P: %pB: %s is not supported for `%pT'\n"),
15615 input_bfd,
15616 ppc64_elf_howto_table[r_type]->name, sym_name);
15617
15618 bfd_set_error (bfd_error_invalid_operation);
15619 ret = FALSE;
15620 goto copy_reloc;
15621 }
15622
15623 /* Multi-instruction sequences that access the TOC can be
15624 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15625 to nop; addi rb,r2,x; */
15626 switch (r_type)
15627 {
15628 default:
15629 break;
15630
15631 case R_PPC64_GOT_TLSLD16_HI:
15632 case R_PPC64_GOT_TLSGD16_HI:
15633 case R_PPC64_GOT_TPREL16_HI:
15634 case R_PPC64_GOT_DTPREL16_HI:
15635 case R_PPC64_GOT16_HI:
15636 case R_PPC64_TOC16_HI:
15637 /* These relocs would only be useful if building up an
15638 offset to later add to r2, perhaps in an indexed
15639 addressing mode instruction. Don't try to optimize.
15640 Unfortunately, the possibility of someone building up an
15641 offset like this or even with the HA relocs, means that
15642 we need to check the high insn when optimizing the low
15643 insn. */
15644 break;
15645
15646 case R_PPC64_PLTCALL:
15647 if (unresolved_reloc)
15648 {
15649 /* No plt entry. Make this into a direct call. */
15650 bfd_byte *p = contents + rel->r_offset;
15651 insn = bfd_get_32 (input_bfd, p);
15652 insn &= 1;
15653 bfd_put_32 (input_bfd, B_DOT | insn, p);
15654 bfd_put_32 (input_bfd, NOP, p + 4);
15655 unresolved_reloc = save_unresolved_reloc;
15656 r_type = R_PPC64_REL24;
15657 }
15658 break;
15659
15660 case R_PPC64_PLTSEQ:
15661 if (unresolved_reloc)
15662 {
15663 unresolved_reloc = FALSE;
15664 goto nop_it;
15665 }
15666 break;
15667
15668 case R_PPC64_PLT16_HA:
15669 if (unresolved_reloc)
15670 {
15671 unresolved_reloc = FALSE;
15672 goto nop_it;
15673 }
15674 /* Fall through. */
15675 case R_PPC64_GOT_TLSLD16_HA:
15676 case R_PPC64_GOT_TLSGD16_HA:
15677 case R_PPC64_GOT_TPREL16_HA:
15678 case R_PPC64_GOT_DTPREL16_HA:
15679 case R_PPC64_GOT16_HA:
15680 case R_PPC64_TOC16_HA:
15681 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15682 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15683 {
15684 bfd_byte *p;
15685 nop_it:
15686 p = contents + (rel->r_offset & ~3);
15687 bfd_put_32 (input_bfd, NOP, p);
15688 goto copy_reloc;
15689 }
15690 break;
15691
15692 case R_PPC64_PLT16_LO:
15693 case R_PPC64_PLT16_LO_DS:
15694 if (unresolved_reloc)
15695 {
15696 unresolved_reloc = FALSE;
15697 goto nop_it;
15698 }
15699 /* Fall through. */
15700 case R_PPC64_GOT_TLSLD16_LO:
15701 case R_PPC64_GOT_TLSGD16_LO:
15702 case R_PPC64_GOT_TPREL16_LO_DS:
15703 case R_PPC64_GOT_DTPREL16_LO_DS:
15704 case R_PPC64_GOT16_LO:
15705 case R_PPC64_GOT16_LO_DS:
15706 case R_PPC64_TOC16_LO:
15707 case R_PPC64_TOC16_LO_DS:
15708 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15709 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15710 {
15711 bfd_byte *p = contents + (rel->r_offset & ~3);
15712 insn = bfd_get_32 (input_bfd, p);
15713 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15714 {
15715 /* Transform addic to addi when we change reg. */
15716 insn &= ~((0x3f << 26) | (0x1f << 16));
15717 insn |= (14u << 26) | (2 << 16);
15718 }
15719 else
15720 {
15721 insn &= ~(0x1f << 16);
15722 insn |= 2 << 16;
15723 }
15724 bfd_put_32 (input_bfd, insn, p);
15725 }
15726 break;
15727
15728 case R_PPC64_TPREL16_HA:
15729 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15730 {
15731 bfd_byte *p = contents + (rel->r_offset & ~3);
15732 insn = bfd_get_32 (input_bfd, p);
15733 if ((insn & ((0x3f << 26) | 0x1f << 16))
15734 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15735 /* xgettext:c-format */
15736 info->callbacks->minfo
15737 (_("%H: warning: %s unexpected insn %#x.\n"),
15738 input_bfd, input_section, rel->r_offset,
15739 ppc64_elf_howto_table[r_type]->name, insn);
15740 else
15741 {
15742 bfd_put_32 (input_bfd, NOP, p);
15743 goto copy_reloc;
15744 }
15745 }
15746 break;
15747
15748 case R_PPC64_TPREL16_LO:
15749 case R_PPC64_TPREL16_LO_DS:
15750 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15751 {
15752 bfd_byte *p = contents + (rel->r_offset & ~3);
15753 insn = bfd_get_32 (input_bfd, p);
15754 insn &= ~(0x1f << 16);
15755 insn |= 13 << 16;
15756 bfd_put_32 (input_bfd, insn, p);
15757 }
15758 break;
15759 }
15760
15761 /* Do any further special processing. */
15762 switch (r_type)
15763 {
15764 default:
15765 break;
15766
15767 case R_PPC64_REL16_HA:
15768 case R_PPC64_REL16DX_HA:
15769 case R_PPC64_ADDR16_HA:
15770 case R_PPC64_ADDR16_HIGHA:
15771 case R_PPC64_ADDR16_HIGHERA:
15772 case R_PPC64_ADDR16_HIGHESTA:
15773 case R_PPC64_TOC16_HA:
15774 case R_PPC64_SECTOFF_HA:
15775 case R_PPC64_TPREL16_HA:
15776 case R_PPC64_TPREL16_HIGHA:
15777 case R_PPC64_TPREL16_HIGHERA:
15778 case R_PPC64_TPREL16_HIGHESTA:
15779 case R_PPC64_DTPREL16_HA:
15780 case R_PPC64_DTPREL16_HIGHA:
15781 case R_PPC64_DTPREL16_HIGHERA:
15782 case R_PPC64_DTPREL16_HIGHESTA:
15783 /* It's just possible that this symbol is a weak symbol
15784 that's not actually defined anywhere. In that case,
15785 'sec' would be NULL, and we should leave the symbol
15786 alone (it will be set to zero elsewhere in the link). */
15787 if (sec == NULL)
15788 break;
15789 /* Fall through. */
15790
15791 case R_PPC64_GOT16_HA:
15792 case R_PPC64_PLTGOT16_HA:
15793 case R_PPC64_PLT16_HA:
15794 case R_PPC64_GOT_TLSGD16_HA:
15795 case R_PPC64_GOT_TLSLD16_HA:
15796 case R_PPC64_GOT_TPREL16_HA:
15797 case R_PPC64_GOT_DTPREL16_HA:
15798 /* Add 0x10000 if sign bit in 0:15 is set.
15799 Bits 0:15 are not used. */
15800 addend += 0x8000;
15801 break;
15802
15803 case R_PPC64_ADDR16_DS:
15804 case R_PPC64_ADDR16_LO_DS:
15805 case R_PPC64_GOT16_DS:
15806 case R_PPC64_GOT16_LO_DS:
15807 case R_PPC64_PLT16_LO_DS:
15808 case R_PPC64_SECTOFF_DS:
15809 case R_PPC64_SECTOFF_LO_DS:
15810 case R_PPC64_TOC16_DS:
15811 case R_PPC64_TOC16_LO_DS:
15812 case R_PPC64_PLTGOT16_DS:
15813 case R_PPC64_PLTGOT16_LO_DS:
15814 case R_PPC64_GOT_TPREL16_DS:
15815 case R_PPC64_GOT_TPREL16_LO_DS:
15816 case R_PPC64_GOT_DTPREL16_DS:
15817 case R_PPC64_GOT_DTPREL16_LO_DS:
15818 case R_PPC64_TPREL16_DS:
15819 case R_PPC64_TPREL16_LO_DS:
15820 case R_PPC64_DTPREL16_DS:
15821 case R_PPC64_DTPREL16_LO_DS:
15822 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15823 mask = 3;
15824 /* If this reloc is against an lq, lxv, or stxv insn, then
15825 the value must be a multiple of 16. This is somewhat of
15826 a hack, but the "correct" way to do this by defining _DQ
15827 forms of all the _DS relocs bloats all reloc switches in
15828 this file. It doesn't make much sense to use these
15829 relocs in data, so testing the insn should be safe. */
15830 if ((insn & (0x3f << 26)) == (56u << 26)
15831 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15832 mask = 15;
15833 relocation += addend;
15834 addend = insn & (mask ^ 3);
15835 if ((relocation & mask) != 0)
15836 {
15837 relocation ^= relocation & mask;
15838 info->callbacks->einfo
15839 /* xgettext:c-format */
15840 (_("%H: error: %s not a multiple of %u\n"),
15841 input_bfd, input_section, rel->r_offset,
15842 ppc64_elf_howto_table[r_type]->name,
15843 mask + 1);
15844 bfd_set_error (bfd_error_bad_value);
15845 ret = FALSE;
15846 goto copy_reloc;
15847 }
15848 break;
15849 }
15850
15851 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15852 because such sections are not SEC_ALLOC and thus ld.so will
15853 not process them. */
15854 howto = ppc64_elf_howto_table[(int) r_type];
15855 if (unresolved_reloc
15856 && !((input_section->flags & SEC_DEBUGGING) != 0
15857 && h->elf.def_dynamic)
15858 && _bfd_elf_section_offset (output_bfd, info, input_section,
15859 rel->r_offset) != (bfd_vma) -1)
15860 {
15861 info->callbacks->einfo
15862 /* xgettext:c-format */
15863 (_("%H: unresolvable %s against `%pT'\n"),
15864 input_bfd, input_section, rel->r_offset,
15865 howto->name,
15866 h->elf.root.root.string);
15867 ret = FALSE;
15868 }
15869
15870 /* 16-bit fields in insns mostly have signed values, but a
15871 few insns have 16-bit unsigned values. Really, we should
15872 have different reloc types. */
15873 if (howto->complain_on_overflow != complain_overflow_dont
15874 && howto->dst_mask == 0xffff
15875 && (input_section->flags & SEC_CODE) != 0)
15876 {
15877 enum complain_overflow complain = complain_overflow_signed;
15878
15879 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15880 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15881 complain = complain_overflow_bitfield;
15882 else if (howto->rightshift == 0
15883 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15884 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15885 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15886 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15887 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15888 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15889 complain = complain_overflow_unsigned;
15890 if (howto->complain_on_overflow != complain)
15891 {
15892 alt_howto = *howto;
15893 alt_howto.complain_on_overflow = complain;
15894 howto = &alt_howto;
15895 }
15896 }
15897
15898 if (r_type == R_PPC64_REL16DX_HA)
15899 {
15900 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15901 if (rel->r_offset + 4 > input_section->size)
15902 r = bfd_reloc_outofrange;
15903 else
15904 {
15905 relocation += addend;
15906 relocation -= (rel->r_offset
15907 + input_section->output_offset
15908 + input_section->output_section->vma);
15909 relocation = (bfd_signed_vma) relocation >> 16;
15910 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15911 insn &= ~0x1fffc1;
15912 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15913 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15914 r = bfd_reloc_ok;
15915 if (relocation + 0x8000 > 0xffff)
15916 r = bfd_reloc_overflow;
15917 }
15918 }
15919 else
15920 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15921 rel->r_offset, relocation, addend);
15922
15923 if (r != bfd_reloc_ok)
15924 {
15925 char *more_info = NULL;
15926 const char *reloc_name = howto->name;
15927
15928 if (reloc_dest != DEST_NORMAL)
15929 {
15930 more_info = bfd_malloc (strlen (reloc_name) + 8);
15931 if (more_info != NULL)
15932 {
15933 strcpy (more_info, reloc_name);
15934 strcat (more_info, (reloc_dest == DEST_OPD
15935 ? " (OPD)" : " (stub)"));
15936 reloc_name = more_info;
15937 }
15938 }
15939
15940 if (r == bfd_reloc_overflow)
15941 {
15942 /* On code like "if (foo) foo();" don't report overflow
15943 on a branch to zero when foo is undefined. */
15944 if (!warned
15945 && (reloc_dest == DEST_STUB
15946 || !(h != NULL
15947 && (h->elf.root.type == bfd_link_hash_undefweak
15948 || h->elf.root.type == bfd_link_hash_undefined)
15949 && is_branch_reloc (r_type))))
15950 info->callbacks->reloc_overflow (info, &h->elf.root,
15951 sym_name, reloc_name,
15952 orig_rel.r_addend,
15953 input_bfd, input_section,
15954 rel->r_offset);
15955 }
15956 else
15957 {
15958 info->callbacks->einfo
15959 /* xgettext:c-format */
15960 (_("%H: %s against `%pT': error %d\n"),
15961 input_bfd, input_section, rel->r_offset,
15962 reloc_name, sym_name, (int) r);
15963 ret = FALSE;
15964 }
15965 if (more_info != NULL)
15966 free (more_info);
15967 }
15968 copy_reloc:
15969 if (wrel != rel)
15970 *wrel = *rel;
15971 }
15972
15973 if (wrel != rel)
15974 {
15975 Elf_Internal_Shdr *rel_hdr;
15976 size_t deleted = rel - wrel;
15977
15978 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15979 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15980 if (rel_hdr->sh_size == 0)
15981 {
15982 /* It is too late to remove an empty reloc section. Leave
15983 one NONE reloc.
15984 ??? What is wrong with an empty section??? */
15985 rel_hdr->sh_size = rel_hdr->sh_entsize;
15986 deleted -= 1;
15987 }
15988 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15989 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15990 input_section->reloc_count -= deleted;
15991 }
15992
15993 /* If we're emitting relocations, then shortly after this function
15994 returns, reloc offsets and addends for this section will be
15995 adjusted. Worse, reloc symbol indices will be for the output
15996 file rather than the input. Save a copy of the relocs for
15997 opd_entry_value. */
15998 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15999 {
16000 bfd_size_type amt;
16001 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
16002 rel = bfd_alloc (input_bfd, amt);
16003 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
16004 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
16005 if (rel == NULL)
16006 return FALSE;
16007 memcpy (rel, relocs, amt);
16008 }
16009 return ret;
16010 }
16011
16012 /* Adjust the value of any local symbols in opd sections. */
16013
16014 static int
16015 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
16016 const char *name ATTRIBUTE_UNUSED,
16017 Elf_Internal_Sym *elfsym,
16018 asection *input_sec,
16019 struct elf_link_hash_entry *h)
16020 {
16021 struct _opd_sec_data *opd;
16022 long adjust;
16023 bfd_vma value;
16024
16025 if (h != NULL)
16026 return 1;
16027
16028 opd = get_opd_info (input_sec);
16029 if (opd == NULL || opd->adjust == NULL)
16030 return 1;
16031
16032 value = elfsym->st_value - input_sec->output_offset;
16033 if (!bfd_link_relocatable (info))
16034 value -= input_sec->output_section->vma;
16035
16036 adjust = opd->adjust[OPD_NDX (value)];
16037 if (adjust == -1)
16038 return 2;
16039
16040 elfsym->st_value += adjust;
16041 return 1;
16042 }
16043
16044 /* Finish up dynamic symbol handling. We set the contents of various
16045 dynamic sections here. */
16046
16047 static bfd_boolean
16048 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
16049 struct bfd_link_info *info,
16050 struct elf_link_hash_entry *h,
16051 Elf_Internal_Sym *sym)
16052 {
16053 struct ppc_link_hash_table *htab;
16054 struct plt_entry *ent;
16055
16056 htab = ppc_hash_table (info);
16057 if (htab == NULL)
16058 return FALSE;
16059
16060 if (!htab->opd_abi && !h->def_regular)
16061 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
16062 if (ent->plt.offset != (bfd_vma) -1)
16063 {
16064 /* Mark the symbol as undefined, rather than as
16065 defined in glink. Leave the value if there were
16066 any relocations where pointer equality matters
16067 (this is a clue for the dynamic linker, to make
16068 function pointer comparisons work between an
16069 application and shared library), otherwise set it
16070 to zero. */
16071 sym->st_shndx = SHN_UNDEF;
16072 if (!h->pointer_equality_needed)
16073 sym->st_value = 0;
16074 else if (!h->ref_regular_nonweak)
16075 {
16076 /* This breaks function pointer comparisons, but
16077 that is better than breaking tests for a NULL
16078 function pointer. */
16079 sym->st_value = 0;
16080 }
16081 break;
16082 }
16083
16084 if (h->needs_copy)
16085 {
16086 /* This symbol needs a copy reloc. Set it up. */
16087 Elf_Internal_Rela rela;
16088 asection *srel;
16089 bfd_byte *loc;
16090
16091 if (h->dynindx == -1
16092 || (h->root.type != bfd_link_hash_defined
16093 && h->root.type != bfd_link_hash_defweak)
16094 || htab->elf.srelbss == NULL
16095 || htab->elf.sreldynrelro == NULL)
16096 abort ();
16097
16098 rela.r_offset = (h->root.u.def.value
16099 + h->root.u.def.section->output_section->vma
16100 + h->root.u.def.section->output_offset);
16101 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
16102 rela.r_addend = 0;
16103 if (h->root.u.def.section == htab->elf.sdynrelro)
16104 srel = htab->elf.sreldynrelro;
16105 else
16106 srel = htab->elf.srelbss;
16107 loc = srel->contents;
16108 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
16109 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
16110 }
16111
16112 return TRUE;
16113 }
16114
16115 /* Used to decide how to sort relocs in an optimal manner for the
16116 dynamic linker, before writing them out. */
16117
16118 static enum elf_reloc_type_class
16119 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
16120 const asection *rel_sec,
16121 const Elf_Internal_Rela *rela)
16122 {
16123 enum elf_ppc64_reloc_type r_type;
16124 struct ppc_link_hash_table *htab = ppc_hash_table (info);
16125
16126 if (rel_sec == htab->elf.irelplt)
16127 return reloc_class_ifunc;
16128
16129 r_type = ELF64_R_TYPE (rela->r_info);
16130 switch (r_type)
16131 {
16132 case R_PPC64_RELATIVE:
16133 return reloc_class_relative;
16134 case R_PPC64_JMP_SLOT:
16135 return reloc_class_plt;
16136 case R_PPC64_COPY:
16137 return reloc_class_copy;
16138 default:
16139 return reloc_class_normal;
16140 }
16141 }
16142
16143 /* Finish up the dynamic sections. */
16144
16145 static bfd_boolean
16146 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
16147 struct bfd_link_info *info)
16148 {
16149 struct ppc_link_hash_table *htab;
16150 bfd *dynobj;
16151 asection *sdyn;
16152
16153 htab = ppc_hash_table (info);
16154 if (htab == NULL)
16155 return FALSE;
16156
16157 dynobj = htab->elf.dynobj;
16158 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
16159
16160 if (htab->elf.dynamic_sections_created)
16161 {
16162 Elf64_External_Dyn *dyncon, *dynconend;
16163
16164 if (sdyn == NULL || htab->elf.sgot == NULL)
16165 abort ();
16166
16167 dyncon = (Elf64_External_Dyn *) sdyn->contents;
16168 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
16169 for (; dyncon < dynconend; dyncon++)
16170 {
16171 Elf_Internal_Dyn dyn;
16172 asection *s;
16173
16174 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
16175
16176 switch (dyn.d_tag)
16177 {
16178 default:
16179 continue;
16180
16181 case DT_PPC64_GLINK:
16182 s = htab->glink;
16183 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
16184 /* We stupidly defined DT_PPC64_GLINK to be the start
16185 of glink rather than the first entry point, which is
16186 what ld.so needs, and now have a bigger stub to
16187 support automatic multiple TOCs. */
16188 dyn.d_un.d_ptr += GLINK_PLTRESOLVE_SIZE (htab) - 8 * 4;
16189 break;
16190
16191 case DT_PPC64_OPD:
16192 s = bfd_get_section_by_name (output_bfd, ".opd");
16193 if (s == NULL)
16194 continue;
16195 dyn.d_un.d_ptr = s->vma;
16196 break;
16197
16198 case DT_PPC64_OPT:
16199 if (htab->do_multi_toc && htab->multi_toc_needed)
16200 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
16201 if (htab->has_plt_localentry0)
16202 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
16203 break;
16204
16205 case DT_PPC64_OPDSZ:
16206 s = bfd_get_section_by_name (output_bfd, ".opd");
16207 if (s == NULL)
16208 continue;
16209 dyn.d_un.d_val = s->size;
16210 break;
16211
16212 case DT_PLTGOT:
16213 s = htab->elf.splt;
16214 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
16215 break;
16216
16217 case DT_JMPREL:
16218 s = htab->elf.srelplt;
16219 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
16220 break;
16221
16222 case DT_PLTRELSZ:
16223 dyn.d_un.d_val = htab->elf.srelplt->size;
16224 break;
16225
16226 case DT_TEXTREL:
16227 if (htab->local_ifunc_resolver)
16228 info->callbacks->einfo
16229 (_("%X%P: text relocations and GNU indirect "
16230 "functions will result in a segfault at runtime\n"));
16231 else if (htab->maybe_local_ifunc_resolver)
16232 info->callbacks->einfo
16233 (_("%P: warning: text relocations and GNU indirect "
16234 "functions may result in a segfault at runtime\n"));
16235 continue;
16236 }
16237
16238 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
16239 }
16240 }
16241
16242 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
16243 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
16244 {
16245 /* Fill in the first entry in the global offset table.
16246 We use it to hold the link-time TOCbase. */
16247 bfd_put_64 (output_bfd,
16248 elf_gp (output_bfd) + TOC_BASE_OFF,
16249 htab->elf.sgot->contents);
16250
16251 /* Set .got entry size. */
16252 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
16253 }
16254
16255 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
16256 && htab->elf.splt->output_section != bfd_abs_section_ptr)
16257 {
16258 /* Set .plt entry size. */
16259 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
16260 = PLT_ENTRY_SIZE (htab);
16261 }
16262
16263 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
16264 brlt ourselves if emitrelocations. */
16265 if (htab->brlt != NULL
16266 && htab->brlt->reloc_count != 0
16267 && !_bfd_elf_link_output_relocs (output_bfd,
16268 htab->brlt,
16269 elf_section_data (htab->brlt)->rela.hdr,
16270 elf_section_data (htab->brlt)->relocs,
16271 NULL))
16272 return FALSE;
16273
16274 if (htab->glink != NULL
16275 && htab->glink->reloc_count != 0
16276 && !_bfd_elf_link_output_relocs (output_bfd,
16277 htab->glink,
16278 elf_section_data (htab->glink)->rela.hdr,
16279 elf_section_data (htab->glink)->relocs,
16280 NULL))
16281 return FALSE;
16282
16283 if (htab->glink_eh_frame != NULL
16284 && htab->glink_eh_frame->size != 0)
16285 {
16286 bfd_vma val;
16287 bfd_byte *p;
16288 struct map_stub *group;
16289 size_t align = 4;
16290
16291 p = htab->glink_eh_frame->contents;
16292 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
16293
16294 for (group = htab->group; group != NULL; group = group->next)
16295 if (group->stub_sec != NULL)
16296 {
16297 /* Offset to stub section. */
16298 val = (group->stub_sec->output_section->vma
16299 + group->stub_sec->output_offset);
16300 val -= (htab->glink_eh_frame->output_section->vma
16301 + htab->glink_eh_frame->output_offset
16302 + (p + 8 - htab->glink_eh_frame->contents));
16303 if (val + 0x80000000 > 0xffffffff)
16304 {
16305 _bfd_error_handler
16306 (_("%s offset too large for .eh_frame sdata4 encoding"),
16307 group->stub_sec->name);
16308 return FALSE;
16309 }
16310 bfd_put_32 (dynobj, val, p + 8);
16311 p += stub_eh_frame_size (group, align);
16312 }
16313 if (htab->glink != NULL && htab->glink->size != 0)
16314 {
16315 /* Offset to .glink. */
16316 val = (htab->glink->output_section->vma
16317 + htab->glink->output_offset
16318 + 8);
16319 val -= (htab->glink_eh_frame->output_section->vma
16320 + htab->glink_eh_frame->output_offset
16321 + (p + 8 - htab->glink_eh_frame->contents));
16322 if (val + 0x80000000 > 0xffffffff)
16323 {
16324 _bfd_error_handler
16325 (_("%s offset too large for .eh_frame sdata4 encoding"),
16326 htab->glink->name);
16327 return FALSE;
16328 }
16329 bfd_put_32 (dynobj, val, p + 8);
16330 p += (24 + align - 1) & -align;
16331 }
16332
16333 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
16334 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
16335 htab->glink_eh_frame,
16336 htab->glink_eh_frame->contents))
16337 return FALSE;
16338 }
16339
16340 /* We need to handle writing out multiple GOT sections ourselves,
16341 since we didn't add them to DYNOBJ. We know dynobj is the first
16342 bfd. */
16343 while ((dynobj = dynobj->link.next) != NULL)
16344 {
16345 asection *s;
16346
16347 if (!is_ppc64_elf (dynobj))
16348 continue;
16349
16350 s = ppc64_elf_tdata (dynobj)->got;
16351 if (s != NULL
16352 && s->size != 0
16353 && s->output_section != bfd_abs_section_ptr
16354 && !bfd_set_section_contents (output_bfd, s->output_section,
16355 s->contents, s->output_offset,
16356 s->size))
16357 return FALSE;
16358 s = ppc64_elf_tdata (dynobj)->relgot;
16359 if (s != NULL
16360 && s->size != 0
16361 && s->output_section != bfd_abs_section_ptr
16362 && !bfd_set_section_contents (output_bfd, s->output_section,
16363 s->contents, s->output_offset,
16364 s->size))
16365 return FALSE;
16366 }
16367
16368 return TRUE;
16369 }
16370
16371 #include "elf64-target.h"
16372
16373 /* FreeBSD support */
16374
16375 #undef TARGET_LITTLE_SYM
16376 #undef TARGET_LITTLE_NAME
16377
16378 #undef TARGET_BIG_SYM
16379 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
16380 #undef TARGET_BIG_NAME
16381 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
16382
16383 #undef ELF_OSABI
16384 #define ELF_OSABI ELFOSABI_FREEBSD
16385
16386 #undef elf64_bed
16387 #define elf64_bed elf64_powerpc_fbsd_bed
16388
16389 #include "elf64-target.h"