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PowerPC undefweak handling
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2017 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 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_want_dynrelro 1
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_dtrel_excludes_plt 1
80 #define elf_backend_default_execstack 0
81
82 #define bfd_elf64_mkobject ppc64_elf_mkobject
83 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
85 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
86 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
87 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
88 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
89 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
92
93 #define elf_backend_object_p ppc64_elf_object_p
94 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
95 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
96 #define elf_backend_write_core_note ppc64_elf_write_core_note
97 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
98 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
99 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
100 #define elf_backend_check_directives ppc64_elf_before_check_relocs
101 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
102 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
103 #define elf_backend_check_relocs ppc64_elf_check_relocs
104 #define elf_backend_gc_keep ppc64_elf_gc_keep
105 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
106 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
107 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
108 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
109 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
110 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
111 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
112 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
113 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
114 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
115 #define elf_backend_action_discarded ppc64_elf_action_discarded
116 #define elf_backend_relocate_section ppc64_elf_relocate_section
117 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
118 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
119 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
120 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
121 #define elf_backend_special_sections ppc64_elf_special_sections
122 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
123 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
124 #define elf_backend_get_reloc_section bfd_get_section_by_name
125
126 /* The name of the dynamic interpreter. This is put in the .interp
127 section. */
128 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
129
130 /* The size in bytes of an entry in the procedure linkage table. */
131 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
132
133 /* The initial size of the plt reserved for the dynamic linker. */
134 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
135
136 /* Offsets to some stack save slots. */
137 #define STK_LR 16
138 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
139 /* This one is dodgy. ELFv2 does not have a linker word, so use the
140 CR save slot. Used only by optimised __tls_get_addr call stub,
141 relying on __tls_get_addr_opt not saving CR.. */
142 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
143
144 /* TOC base pointers offset from start of TOC. */
145 #define TOC_BASE_OFF 0x8000
146 /* TOC base alignment. */
147 #define TOC_BASE_ALIGN 256
148
149 /* Offset of tp and dtp pointers from start of TLS block. */
150 #define TP_OFFSET 0x7000
151 #define DTP_OFFSET 0x8000
152
153 /* .plt call stub instructions. The normal stub is like this, but
154 sometimes the .plt entry crosses a 64k boundary and we need to
155 insert an addi to adjust r11. */
156 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
157 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
158 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
159 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
160 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
161 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
162 #define BCTR 0x4e800420 /* bctr */
163
164 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
165 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
166 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
167
168 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
169 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
170 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
171 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
172 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
173 #define BNECTR 0x4ca20420 /* bnectr+ */
174 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
175
176 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
177 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
178 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
179
180 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
181 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
182 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
183
184 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
185 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
186 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
187 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
188 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
189
190 /* glink call stub instructions. We enter with the index in R0. */
191 #define GLINK_CALL_STUB_SIZE (16*4)
192 /* 0: */
193 /* .quad plt0-1f */
194 /* __glink: */
195 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
196 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
197 /* 1: */
198 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
199 /* ld %2,(0b-1b)(%11) */
200 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
201 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
202 /* ld %12,0(%11) */
203 /* ld %2,8(%11) */
204 /* mtctr %12 */
205 /* ld %11,16(%11) */
206 /* bctr */
207 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
208 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
209 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
210 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
211 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
212
213 /* Pad with this. */
214 #define NOP 0x60000000
215
216 /* Some other nops. */
217 #define CROR_151515 0x4def7b82
218 #define CROR_313131 0x4ffffb82
219
220 /* .glink entries for the first 32k functions are two instructions. */
221 #define LI_R0_0 0x38000000 /* li %r0,0 */
222 #define B_DOT 0x48000000 /* b . */
223
224 /* After that, we need two instructions to load the index, followed by
225 a branch. */
226 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
227 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
228
229 /* Instructions used by the save and restore reg functions. */
230 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
231 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
232 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
233 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
234 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
235 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
236 #define LI_R12_0 0x39800000 /* li %r12,0 */
237 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
238 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
239 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
240 #define BLR 0x4e800020 /* blr */
241
242 /* Since .opd is an array of descriptors and each entry will end up
243 with identical R_PPC64_RELATIVE relocs, there is really no need to
244 propagate .opd relocs; The dynamic linker should be taught to
245 relocate .opd without reloc entries. */
246 #ifndef NO_OPD_RELOCS
247 #define NO_OPD_RELOCS 0
248 #endif
249
250 #ifndef ARRAY_SIZE
251 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
252 #endif
253
254 static inline int
255 abiversion (bfd *abfd)
256 {
257 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
258 }
259
260 static inline void
261 set_abiversion (bfd *abfd, int ver)
262 {
263 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
264 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
265 }
266 \f
267 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
268
269 /* Relocation HOWTO's. */
270 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
271
272 static reloc_howto_type ppc64_elf_howto_raw[] = {
273 /* This reloc does nothing. */
274 HOWTO (R_PPC64_NONE, /* type */
275 0, /* rightshift */
276 3, /* size (0 = byte, 1 = short, 2 = long) */
277 0, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_dont, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_NONE", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* A standard 32 bit relocation. */
289 HOWTO (R_PPC64_ADDR32, /* type */
290 0, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 32, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_bitfield, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_PPC64_ADDR32", /* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xffffffff, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 26 bit branch; the lower two bits must be zero.
304 FIXME: we don't check that, we just clear them. */
305 HOWTO (R_PPC64_ADDR24, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 26, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR24", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0x03fffffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A standard 16 bit relocation. */
320 HOWTO (R_PPC64_ADDR16, /* type */
321 0, /* rightshift */
322 1, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_bitfield, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* A 16 bit relocation without overflow. */
335 HOWTO (R_PPC64_ADDR16_LO, /* type */
336 0, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_dont,/* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_LO", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xffff, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* Bits 16-31 of an address. */
350 HOWTO (R_PPC64_ADDR16_HI, /* type */
351 16, /* rightshift */
352 1, /* size (0 = byte, 1 = short, 2 = long) */
353 16, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC64_ADDR16_HI", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0xffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
365 bits, treated as a signed number, is negative. */
366 HOWTO (R_PPC64_ADDR16_HA, /* type */
367 16, /* rightshift */
368 1, /* size (0 = byte, 1 = short, 2 = long) */
369 16, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_signed, /* complain_on_overflow */
373 ppc64_elf_ha_reloc, /* special_function */
374 "R_PPC64_ADDR16_HA", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* An absolute 16 bit branch; the lower two bits must be zero.
381 FIXME: we don't check that, we just clear them. */
382 HOWTO (R_PPC64_ADDR14, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 ppc64_elf_branch_reloc, /* special_function */
390 "R_PPC64_ADDR14", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x0000fffc, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* An absolute 16 bit branch, for which bit 10 should be set to
397 indicate that the branch is expected to be taken. The lower two
398 bits must be zero. */
399 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 FALSE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 ppc64_elf_brtaken_reloc, /* special_function */
407 "R_PPC64_ADDR14_BRTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0x0000fffc, /* dst_mask */
411 FALSE), /* pcrel_offset */
412
413 /* An absolute 16 bit branch, for which bit 10 should be set to
414 indicate that the branch is not expected to be taken. The lower
415 two bits must be zero. */
416 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 16, /* bitsize */
420 FALSE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_brtaken_reloc, /* special_function */
424 "R_PPC64_ADDR14_BRNTAKEN",/* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x0000fffc, /* dst_mask */
428 FALSE), /* pcrel_offset */
429
430 /* A relative 26 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL24, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 26, /* bitsize */
435 TRUE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_signed, /* complain_on_overflow */
438 ppc64_elf_branch_reloc, /* special_function */
439 "R_PPC64_REL24", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x03fffffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch; the lower two bits must be zero. */
446 HOWTO (R_PPC64_REL14, /* type */
447 0, /* rightshift */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
449 16, /* bitsize */
450 TRUE, /* pc_relative */
451 0, /* bitpos */
452 complain_overflow_signed, /* complain_on_overflow */
453 ppc64_elf_branch_reloc, /* special_function */
454 "R_PPC64_REL14", /* name */
455 FALSE, /* partial_inplace */
456 0, /* src_mask */
457 0x0000fffc, /* dst_mask */
458 TRUE), /* pcrel_offset */
459
460 /* A relative 16 bit branch. Bit 10 should be set to indicate that
461 the branch is expected to be taken. The lower two bits must be
462 zero. */
463 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
464 0, /* rightshift */
465 2, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 TRUE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_signed, /* complain_on_overflow */
470 ppc64_elf_brtaken_reloc, /* special_function */
471 "R_PPC64_REL14_BRTAKEN", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0x0000fffc, /* dst_mask */
475 TRUE), /* pcrel_offset */
476
477 /* A relative 16 bit branch. Bit 10 should be set to indicate that
478 the branch is not expected to be taken. The lower two bits must
479 be zero. */
480 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
481 0, /* rightshift */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
483 16, /* bitsize */
484 TRUE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_signed, /* complain_on_overflow */
487 ppc64_elf_brtaken_reloc, /* special_function */
488 "R_PPC64_REL14_BRNTAKEN",/* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0x0000fffc, /* dst_mask */
492 TRUE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
495 symbol. */
496 HOWTO (R_PPC64_GOT16, /* type */
497 0, /* rightshift */
498 1, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_signed, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GOT16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0xffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
511 the symbol. */
512 HOWTO (R_PPC64_GOT16_LO, /* type */
513 0, /* rightshift */
514 1, /* size (0 = byte, 1 = short, 2 = long) */
515 16, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_GOT16_LO", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
527 the symbol. */
528 HOWTO (R_PPC64_GOT16_HI, /* type */
529 16, /* rightshift */
530 1, /* size (0 = byte, 1 = short, 2 = long) */
531 16, /* bitsize */
532 FALSE, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_signed,/* complain_on_overflow */
535 ppc64_elf_unhandled_reloc, /* special_function */
536 "R_PPC64_GOT16_HI", /* name */
537 FALSE, /* partial_inplace */
538 0, /* src_mask */
539 0xffff, /* dst_mask */
540 FALSE), /* pcrel_offset */
541
542 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
543 the symbol. */
544 HOWTO (R_PPC64_GOT16_HA, /* type */
545 16, /* rightshift */
546 1, /* size (0 = byte, 1 = short, 2 = long) */
547 16, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_signed,/* complain_on_overflow */
551 ppc64_elf_unhandled_reloc, /* special_function */
552 "R_PPC64_GOT16_HA", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* This is used only by the dynamic linker. The symbol should exist
559 both in the object being run and in some shared library. The
560 dynamic linker copies the data addressed by the symbol from the
561 shared library into the object, because the object being
562 run has to have the data at some particular address. */
563 HOWTO (R_PPC64_COPY, /* type */
564 0, /* rightshift */
565 0, /* this one is variable size */
566 0, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_dont, /* complain_on_overflow */
570 ppc64_elf_unhandled_reloc, /* special_function */
571 "R_PPC64_COPY", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* Like R_PPC64_ADDR64, but used when setting global offset table
578 entries. */
579 HOWTO (R_PPC64_GLOB_DAT, /* type */
580 0, /* rightshift */
581 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
582 64, /* bitsize */
583 FALSE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_dont, /* complain_on_overflow */
586 ppc64_elf_unhandled_reloc, /* special_function */
587 "R_PPC64_GLOB_DAT", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 ONES (64), /* dst_mask */
591 FALSE), /* pcrel_offset */
592
593 /* Created by the link editor. Marks a procedure linkage table
594 entry for a symbol. */
595 HOWTO (R_PPC64_JMP_SLOT, /* type */
596 0, /* rightshift */
597 0, /* size (0 = byte, 1 = short, 2 = long) */
598 0, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_dont, /* complain_on_overflow */
602 ppc64_elf_unhandled_reloc, /* special_function */
603 "R_PPC64_JMP_SLOT", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 /* Used only by the dynamic linker. When the object is run, this
610 doubleword64 is set to the load address of the object, plus the
611 addend. */
612 HOWTO (R_PPC64_RELATIVE, /* type */
613 0, /* rightshift */
614 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
615 64, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_dont, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_RELATIVE", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 ONES (64), /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR32, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_UADDR32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffffffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* Like R_PPC64_ADDR16, but may be unaligned. */
642 HOWTO (R_PPC64_UADDR16, /* type */
643 0, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_UADDR16", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* 32-bit PC relative. */
657 HOWTO (R_PPC64_REL32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 TRUE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_signed, /* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 "R_PPC64_REL32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 TRUE), /* pcrel_offset */
670
671 /* 32-bit relocation to the symbol's procedure linkage table. */
672 HOWTO (R_PPC64_PLT32, /* type */
673 0, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 32, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_bitfield, /* complain_on_overflow */
679 ppc64_elf_unhandled_reloc, /* special_function */
680 "R_PPC64_PLT32", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffffffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
687 FIXME: R_PPC64_PLTREL32 not supported. */
688 HOWTO (R_PPC64_PLTREL32, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 32, /* bitsize */
692 TRUE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_signed, /* complain_on_overflow */
695 ppc64_elf_unhandled_reloc, /* special_function */
696 "R_PPC64_PLTREL32", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffffffff, /* dst_mask */
700 TRUE), /* pcrel_offset */
701
702 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
703 the symbol. */
704 HOWTO (R_PPC64_PLT16_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 ppc64_elf_unhandled_reloc, /* special_function */
712 "R_PPC64_PLT16_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
719 the symbol. */
720 HOWTO (R_PPC64_PLT16_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_signed, /* complain_on_overflow */
727 ppc64_elf_unhandled_reloc, /* special_function */
728 "R_PPC64_PLT16_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
735 the symbol. */
736 HOWTO (R_PPC64_PLT16_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_signed, /* complain_on_overflow */
743 ppc64_elf_unhandled_reloc, /* special_function */
744 "R_PPC64_PLT16_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit section relative relocation. */
751 HOWTO (R_PPC64_SECTOFF, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_signed, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Like R_PPC64_SECTOFF, but no overflow warning. */
766 HOWTO (R_PPC64_SECTOFF_LO, /* type */
767 0, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_LO", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HI, /* type */
782 16, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 ppc64_elf_sectoff_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HI", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* 16-bit upper half adjusted section relative relocation. */
796 HOWTO (R_PPC64_SECTOFF_HA, /* type */
797 16, /* rightshift */
798 1, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 FALSE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_signed, /* complain_on_overflow */
803 ppc64_elf_sectoff_ha_reloc, /* special_function */
804 "R_PPC64_SECTOFF_HA", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xffff, /* dst_mask */
808 FALSE), /* pcrel_offset */
809
810 /* Like R_PPC64_REL24 without touching the two least significant bits. */
811 HOWTO (R_PPC64_REL30, /* type */
812 2, /* rightshift */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
814 30, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_PPC64_REL30", /* name */
820 FALSE, /* partial_inplace */
821 0, /* src_mask */
822 0xfffffffc, /* dst_mask */
823 TRUE), /* pcrel_offset */
824
825 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
826
827 /* A standard 64-bit relocation. */
828 HOWTO (R_PPC64_ADDR64, /* type */
829 0, /* rightshift */
830 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
831 64, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC64_ADDR64", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 ONES (64), /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address. */
843 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
844 32, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_dont, /* complain_on_overflow */
850 bfd_elf_generic_reloc, /* special_function */
851 "R_PPC64_ADDR16_HIGHER", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* The bits 32-47 of an address, plus 1 if the contents of the low
858 16 bits, treated as a signed number, is negative. */
859 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
860 32, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 ppc64_elf_ha_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHERA", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* The bits 48-63 of an address. */
874 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
875 48, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_PPC64_ADDR16_HIGHEST", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* The bits 48-63 of an address, plus 1 if the contents of the low
889 16 bits, treated as a signed number, is negative. */
890 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
891 48, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc64_elf_ha_reloc, /* special_function */
898 "R_PPC64_ADDR16_HIGHESTA", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like ADDR64, but may be unaligned. */
905 HOWTO (R_PPC64_UADDR64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_UADDR64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* 64-bit relative relocation. */
920 HOWTO (R_PPC64_REL64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 TRUE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 bfd_elf_generic_reloc, /* special_function */
928 "R_PPC64_REL64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 TRUE), /* pcrel_offset */
933
934 /* 64-bit relocation to the symbol's procedure linkage table. */
935 HOWTO (R_PPC64_PLT64, /* type */
936 0, /* rightshift */
937 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
938 64, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_unhandled_reloc, /* special_function */
943 "R_PPC64_PLT64", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 ONES (64), /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 64-bit PC relative relocation to the symbol's procedure linkage
950 table. */
951 /* FIXME: R_PPC64_PLTREL64 not supported. */
952 HOWTO (R_PPC64_PLTREL64, /* type */
953 0, /* rightshift */
954 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
955 64, /* bitsize */
956 TRUE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_unhandled_reloc, /* special_function */
960 "R_PPC64_PLTREL64", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 ONES (64), /* dst_mask */
964 TRUE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation. */
967
968 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
969 HOWTO (R_PPC64_TOC16, /* type */
970 0, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_signed, /* complain_on_overflow */
976 ppc64_elf_toc_reloc, /* special_function */
977 "R_PPC64_TOC16", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 16 bit TOC-relative relocation without overflow. */
984
985 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
986 HOWTO (R_PPC64_TOC16_LO, /* type */
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc64_elf_toc_reloc, /* special_function */
994 "R_PPC64_TOC16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* 16 bit TOC-relative relocation, high 16 bits. */
1001
1002 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1003 HOWTO (R_PPC64_TOC16_HI, /* type */
1004 16, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_signed, /* complain_on_overflow */
1010 ppc64_elf_toc_reloc, /* special_function */
1011 "R_PPC64_TOC16_HI", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1018 contents of the low 16 bits, treated as a signed number, is
1019 negative. */
1020
1021 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1022 HOWTO (R_PPC64_TOC16_HA, /* type */
1023 16, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc64_elf_toc_ha_reloc, /* special_function */
1030 "R_PPC64_TOC16_HA", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1037
1038 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1039 HOWTO (R_PPC64_TOC, /* type */
1040 0, /* rightshift */
1041 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1042 64, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_toc64_reloc, /* special_function */
1047 "R_PPC64_TOC", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 ONES (64), /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_GOT16, but also informs the link editor that the
1054 value to relocate may (!) refer to a PLT entry which the link
1055 editor (a) may replace with the symbol value. If the link editor
1056 is unable to fully resolve the symbol, it may (b) create a PLT
1057 entry and store the address to the new PLT entry in the GOT.
1058 This permits lazy resolution of function symbols at run time.
1059 The link editor may also skip all of this and just (c) emit a
1060 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1061 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1062 HOWTO (R_PPC64_PLTGOT16, /* type */
1063 0, /* rightshift */
1064 1, /* size (0 = byte, 1 = short, 2 = long) */
1065 16, /* bitsize */
1066 FALSE, /* pc_relative */
1067 0, /* bitpos */
1068 complain_overflow_signed, /* complain_on_overflow */
1069 ppc64_elf_unhandled_reloc, /* special_function */
1070 "R_PPC64_PLTGOT16", /* name */
1071 FALSE, /* partial_inplace */
1072 0, /* src_mask */
1073 0xffff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1075
1076 /* Like R_PPC64_PLTGOT16, but without overflow. */
1077 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1078 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_unhandled_reloc, /* special_function */
1086 "R_PPC64_PLTGOT16_LO", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1093 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1094 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc64_elf_unhandled_reloc, /* special_function */
1102 "R_PPC64_PLTGOT16_HI", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1109 1 if the contents of the low 16 bits, treated as a signed number,
1110 is negative. */
1111 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1112 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1113 16, /* rightshift */
1114 1, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_signed, /* complain_on_overflow */
1119 ppc64_elf_unhandled_reloc, /* special_function */
1120 "R_PPC64_PLTGOT16_HA", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xffff, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_DS, /* type */
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_signed, /* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_DS", /* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_PPC64_ADDR16_LO_DS",/* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_signed, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc64_elf_unhandled_reloc, /* special_function */
1180 "R_PPC64_GOT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc64_elf_unhandled_reloc, /* special_function */
1195 "R_PPC64_PLT16_LO_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_signed, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_DS", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1218 0, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc64_elf_sectoff_reloc, /* special_function */
1225 "R_PPC64_SECTOFF_LO_DS",/* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_DS, /* type */
1233 0, /* rightshift */
1234 1, /* size (0 = byte, 1 = short, 2 = long) */
1235 16, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_signed, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1247 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1248 0, /* rightshift */
1249 1, /* size (0 = byte, 1 = short, 2 = long) */
1250 16, /* bitsize */
1251 FALSE, /* pc_relative */
1252 0, /* bitpos */
1253 complain_overflow_dont, /* complain_on_overflow */
1254 ppc64_elf_toc_reloc, /* special_function */
1255 "R_PPC64_TOC16_LO_DS", /* name */
1256 FALSE, /* partial_inplace */
1257 0, /* src_mask */
1258 0xfffc, /* dst_mask */
1259 FALSE), /* pcrel_offset */
1260
1261 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1262 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1263 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_signed, /* complain_on_overflow */
1270 ppc64_elf_unhandled_reloc, /* special_function */
1271 "R_PPC64_PLTGOT16_DS", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xfffc, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1278 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1279 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc64_elf_unhandled_reloc, /* special_function */
1287 "R_PPC64_PLTGOT16_LO_DS",/* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xfffc, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* Marker relocs for TLS. */
1294 HOWTO (R_PPC64_TLS,
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 32, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC64_TLS", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_PPC64_TLSGD,
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 32, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_PPC64_TLSGD", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 0, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 HOWTO (R_PPC64_TLSLD,
1323 0, /* rightshift */
1324 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 32, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_PPC64_TLSLD", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 HOWTO (R_PPC64_TOCSAVE,
1337 0, /* rightshift */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1339 32, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont, /* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_PPC64_TOCSAVE", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* Computes the load module index of the load module that contains the
1351 definition of its TLS sym. */
1352 HOWTO (R_PPC64_DTPMOD64,
1353 0, /* rightshift */
1354 4, /* size (0 = byte, 1 = short, 2 = long) */
1355 64, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_dont, /* complain_on_overflow */
1359 ppc64_elf_unhandled_reloc, /* special_function */
1360 "R_PPC64_DTPMOD64", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 ONES (64), /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* Computes a dtv-relative displacement, the difference between the value
1367 of sym+add and the base address of the thread-local storage block that
1368 contains the definition of sym, minus 0x8000. */
1369 HOWTO (R_PPC64_DTPREL64,
1370 0, /* rightshift */
1371 4, /* size (0 = byte, 1 = short, 2 = long) */
1372 64, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL64", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 ONES (64), /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* A 16 bit dtprel reloc. */
1384 HOWTO (R_PPC64_DTPREL16,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_signed, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16, but no overflow. */
1399 HOWTO (R_PPC64_DTPREL16_LO,
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_dont, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_LO", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HI,
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_HI", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HA,
1430 16, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_signed, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HA", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHER,
1445 32, /* rightshift */
1446 1, /* size (0 = byte, 1 = short, 2 = long) */
1447 16, /* bitsize */
1448 FALSE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 ppc64_elf_unhandled_reloc, /* special_function */
1452 "R_PPC64_DTPREL16_HIGHER", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1460 32, /* rightshift */
1461 1, /* size (0 = byte, 1 = short, 2 = long) */
1462 16, /* bitsize */
1463 FALSE, /* pc_relative */
1464 0, /* bitpos */
1465 complain_overflow_dont, /* complain_on_overflow */
1466 ppc64_elf_unhandled_reloc, /* special_function */
1467 "R_PPC64_DTPREL16_HIGHERA", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1475 48, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 16, /* bitsize */
1478 FALSE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 ppc64_elf_unhandled_reloc, /* special_function */
1482 "R_PPC64_DTPREL16_HIGHEST", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1489 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1490 48, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_dont, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xffff, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16, but for insns with a DS field. */
1504 HOWTO (R_PPC64_DTPREL16_DS,
1505 0, /* rightshift */
1506 1, /* size (0 = byte, 1 = short, 2 = long) */
1507 16, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_signed, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Like DTPREL16_DS, but no overflow. */
1519 HOWTO (R_PPC64_DTPREL16_LO_DS,
1520 0, /* rightshift */
1521 1, /* size (0 = byte, 1 = short, 2 = long) */
1522 16, /* bitsize */
1523 FALSE, /* pc_relative */
1524 0, /* bitpos */
1525 complain_overflow_dont, /* complain_on_overflow */
1526 ppc64_elf_unhandled_reloc, /* special_function */
1527 "R_PPC64_DTPREL16_LO_DS", /* name */
1528 FALSE, /* partial_inplace */
1529 0, /* src_mask */
1530 0xfffc, /* dst_mask */
1531 FALSE), /* pcrel_offset */
1532
1533 /* Computes a tp-relative displacement, the difference between the value of
1534 sym+add and the value of the thread pointer (r13). */
1535 HOWTO (R_PPC64_TPREL64,
1536 0, /* rightshift */
1537 4, /* size (0 = byte, 1 = short, 2 = long) */
1538 64, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL64", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 ONES (64), /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* A 16 bit tprel reloc. */
1550 HOWTO (R_PPC64_TPREL16,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_signed, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16, but no overflow. */
1565 HOWTO (R_PPC64_TPREL16_LO,
1566 0, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_LO", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_LO, but next higher group of 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HI,
1581 16, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_signed, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_HI", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but adjust for low 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HA,
1596 16, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_signed, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HA", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HI, but next higher group of 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHER,
1611 32, /* rightshift */
1612 1, /* size (0 = byte, 1 = short, 2 = long) */
1613 16, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont, /* complain_on_overflow */
1617 ppc64_elf_unhandled_reloc, /* special_function */
1618 "R_PPC64_TPREL16_HIGHER", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHERA,
1626 32, /* rightshift */
1627 1, /* size (0 = byte, 1 = short, 2 = long) */
1628 16, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont, /* complain_on_overflow */
1632 ppc64_elf_unhandled_reloc, /* special_function */
1633 "R_PPC64_TPREL16_HIGHERA", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHEST,
1641 48, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_TPREL16_HIGHEST", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1655 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1656 48, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_HIGHESTA", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16, but for insns with a DS field. */
1670 HOWTO (R_PPC64_TPREL16_DS,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_signed, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like TPREL16_DS, but no overflow. */
1685 HOWTO (R_PPC64_TPREL16_LO_DS,
1686 0, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_TPREL16_LO_DS", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xfffc, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1700 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1701 to the first entry relative to the TOC base (r2). */
1702 HOWTO (R_PPC64_GOT_TLSGD16,
1703 0, /* rightshift */
1704 1, /* size (0 = byte, 1 = short, 2 = long) */
1705 16, /* bitsize */
1706 FALSE, /* pc_relative */
1707 0, /* bitpos */
1708 complain_overflow_signed, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16, but no overflow. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1718 0, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_dont, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_LO", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1733 16, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_signed, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_TLSGD16_HI", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1747 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1748 16, /* rightshift */
1749 1, /* size (0 = byte, 1 = short, 2 = long) */
1750 16, /* bitsize */
1751 FALSE, /* pc_relative */
1752 0, /* bitpos */
1753 complain_overflow_signed, /* complain_on_overflow */
1754 ppc64_elf_unhandled_reloc, /* special_function */
1755 "R_PPC64_GOT_TLSGD16_HA", /* name */
1756 FALSE, /* partial_inplace */
1757 0, /* src_mask */
1758 0xffff, /* dst_mask */
1759 FALSE), /* pcrel_offset */
1760
1761 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1762 with values (sym+add)@dtpmod and zero, and computes the offset to the
1763 first entry relative to the TOC base (r2). */
1764 HOWTO (R_PPC64_GOT_TLSLD16,
1765 0, /* rightshift */
1766 1, /* size (0 = byte, 1 = short, 2 = long) */
1767 16, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_signed, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16, but no overflow. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_dont, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_LO", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1795 16, /* rightshift */
1796 1, /* size (0 = byte, 1 = short, 2 = long) */
1797 16, /* bitsize */
1798 FALSE, /* pc_relative */
1799 0, /* bitpos */
1800 complain_overflow_signed, /* complain_on_overflow */
1801 ppc64_elf_unhandled_reloc, /* special_function */
1802 "R_PPC64_GOT_TLSLD16_HI", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1809 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1810 16, /* rightshift */
1811 1, /* size (0 = byte, 1 = short, 2 = long) */
1812 16, /* bitsize */
1813 FALSE, /* pc_relative */
1814 0, /* bitpos */
1815 complain_overflow_signed, /* complain_on_overflow */
1816 ppc64_elf_unhandled_reloc, /* special_function */
1817 "R_PPC64_GOT_TLSLD16_HA", /* name */
1818 FALSE, /* partial_inplace */
1819 0, /* src_mask */
1820 0xffff, /* dst_mask */
1821 FALSE), /* pcrel_offset */
1822
1823 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1824 the offset to the entry relative to the TOC base (r2). */
1825 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1826 0, /* rightshift */
1827 1, /* size (0 = byte, 1 = short, 2 = long) */
1828 16, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
1831 complain_overflow_signed, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_DS, but no overflow. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1841 0, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_dont, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xfffc, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1856 16, /* rightshift */
1857 1, /* size (0 = byte, 1 = short, 2 = long) */
1858 16, /* bitsize */
1859 FALSE, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_signed, /* complain_on_overflow */
1862 ppc64_elf_unhandled_reloc, /* special_function */
1863 "R_PPC64_GOT_DTPREL16_HI", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1870 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1871 16, /* rightshift */
1872 1, /* size (0 = byte, 1 = short, 2 = long) */
1873 16, /* bitsize */
1874 FALSE, /* pc_relative */
1875 0, /* bitpos */
1876 complain_overflow_signed, /* complain_on_overflow */
1877 ppc64_elf_unhandled_reloc, /* special_function */
1878 "R_PPC64_GOT_DTPREL16_HA", /* name */
1879 FALSE, /* partial_inplace */
1880 0, /* src_mask */
1881 0xffff, /* dst_mask */
1882 FALSE), /* pcrel_offset */
1883
1884 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1885 offset to the entry relative to the TOC base (r2). */
1886 HOWTO (R_PPC64_GOT_TPREL16_DS,
1887 0, /* rightshift */
1888 1, /* size (0 = byte, 1 = short, 2 = long) */
1889 16, /* bitsize */
1890 FALSE, /* pc_relative */
1891 0, /* bitpos */
1892 complain_overflow_signed, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_DS, but no overflow. */
1901 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1902 0, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_dont, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xfffc, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HI,
1917 16, /* rightshift */
1918 1, /* size (0 = byte, 1 = short, 2 = long) */
1919 16, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_signed, /* complain_on_overflow */
1923 ppc64_elf_unhandled_reloc, /* special_function */
1924 "R_PPC64_GOT_TPREL16_HI", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1931 HOWTO (R_PPC64_GOT_TPREL16_HA,
1932 16, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 FALSE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_signed, /* complain_on_overflow */
1938 ppc64_elf_unhandled_reloc, /* special_function */
1939 "R_PPC64_GOT_TPREL16_HA", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 FALSE), /* pcrel_offset */
1944
1945 HOWTO (R_PPC64_JMP_IREL, /* type */
1946 0, /* rightshift */
1947 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1948 0, /* bitsize */
1949 FALSE, /* pc_relative */
1950 0, /* bitpos */
1951 complain_overflow_dont, /* complain_on_overflow */
1952 ppc64_elf_unhandled_reloc, /* special_function */
1953 "R_PPC64_JMP_IREL", /* name */
1954 FALSE, /* partial_inplace */
1955 0, /* src_mask */
1956 0, /* dst_mask */
1957 FALSE), /* pcrel_offset */
1958
1959 HOWTO (R_PPC64_IRELATIVE, /* type */
1960 0, /* rightshift */
1961 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1962 64, /* bitsize */
1963 FALSE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_dont, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_IRELATIVE", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 ONES (64), /* dst_mask */
1971 FALSE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation. */
1974 HOWTO (R_PPC64_REL16, /* type */
1975 0, /* rightshift */
1976 1, /* size (0 = byte, 1 = short, 2 = long) */
1977 16, /* bitsize */
1978 TRUE, /* pc_relative */
1979 0, /* bitpos */
1980 complain_overflow_signed, /* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* A 16 bit relative relocation without overflow. */
1989 HOWTO (R_PPC64_REL16_LO, /* type */
1990 0, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_dont,/* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_LO", /* name */
1998 FALSE, /* partial_inplace */
1999 0, /* src_mask */
2000 0xffff, /* dst_mask */
2001 TRUE), /* pcrel_offset */
2002
2003 /* The high order 16 bits of a relative address. */
2004 HOWTO (R_PPC64_REL16_HI, /* type */
2005 16, /* rightshift */
2006 1, /* size (0 = byte, 1 = short, 2 = long) */
2007 16, /* bitsize */
2008 TRUE, /* pc_relative */
2009 0, /* bitpos */
2010 complain_overflow_signed, /* complain_on_overflow */
2011 bfd_elf_generic_reloc, /* special_function */
2012 "R_PPC64_REL16_HI", /* name */
2013 FALSE, /* partial_inplace */
2014 0, /* src_mask */
2015 0xffff, /* dst_mask */
2016 TRUE), /* pcrel_offset */
2017
2018 /* The high order 16 bits of a relative address, plus 1 if the contents of
2019 the low 16 bits, treated as a signed number, is negative. */
2020 HOWTO (R_PPC64_REL16_HA, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 TRUE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_signed, /* complain_on_overflow */
2027 ppc64_elf_ha_reloc, /* special_function */
2028 "R_PPC64_REL16_HA", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 TRUE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2035 HOWTO (R_PPC64_REL16DX_HA, /* type */
2036 16, /* rightshift */
2037 2, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 TRUE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_signed, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_REL16DX_HA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0x1fffc1, /* dst_mask */
2047 TRUE), /* pcrel_offset */
2048
2049 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2050 HOWTO (R_PPC64_16DX_HA, /* type */
2051 16, /* rightshift */
2052 2, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_signed, /* complain_on_overflow */
2057 ppc64_elf_ha_reloc, /* special_function */
2058 "R_PPC64_16DX_HA", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0x1fffc1, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2065 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2066 16, /* rightshift */
2067 1, /* size (0 = byte, 1 = short, 2 = long) */
2068 16, /* bitsize */
2069 FALSE, /* pc_relative */
2070 0, /* bitpos */
2071 complain_overflow_dont, /* complain_on_overflow */
2072 bfd_elf_generic_reloc, /* special_function */
2073 "R_PPC64_ADDR16_HIGH", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2080 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2081 16, /* rightshift */
2082 1, /* size (0 = byte, 1 = short, 2 = long) */
2083 16, /* bitsize */
2084 FALSE, /* pc_relative */
2085 0, /* bitpos */
2086 complain_overflow_dont, /* complain_on_overflow */
2087 ppc64_elf_ha_reloc, /* special_function */
2088 "R_PPC64_ADDR16_HIGHA", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2095 HOWTO (R_PPC64_DTPREL16_HIGH,
2096 16, /* rightshift */
2097 1, /* size (0 = byte, 1 = short, 2 = long) */
2098 16, /* bitsize */
2099 FALSE, /* pc_relative */
2100 0, /* bitpos */
2101 complain_overflow_dont, /* complain_on_overflow */
2102 ppc64_elf_unhandled_reloc, /* special_function */
2103 "R_PPC64_DTPREL16_HIGH", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2110 HOWTO (R_PPC64_DTPREL16_HIGHA,
2111 16, /* rightshift */
2112 1, /* size (0 = byte, 1 = short, 2 = long) */
2113 16, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 ppc64_elf_unhandled_reloc, /* special_function */
2118 "R_PPC64_DTPREL16_HIGHA", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 0xffff, /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2125 HOWTO (R_PPC64_TPREL16_HIGH,
2126 16, /* rightshift */
2127 1, /* size (0 = byte, 1 = short, 2 = long) */
2128 16, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 ppc64_elf_unhandled_reloc, /* special_function */
2133 "R_PPC64_TPREL16_HIGH", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0xffff, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2140 HOWTO (R_PPC64_TPREL16_HIGHA,
2141 16, /* rightshift */
2142 1, /* size (0 = byte, 1 = short, 2 = long) */
2143 16, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 ppc64_elf_unhandled_reloc, /* special_function */
2148 "R_PPC64_TPREL16_HIGHA", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0xffff, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153
2154 /* Marker reloc on ELFv2 large-model function entry. */
2155 HOWTO (R_PPC64_ENTRY,
2156 0, /* rightshift */
2157 2, /* size (0 = byte, 1 = short, 2 = long) */
2158 32, /* bitsize */
2159 FALSE, /* pc_relative */
2160 0, /* bitpos */
2161 complain_overflow_dont, /* complain_on_overflow */
2162 bfd_elf_generic_reloc, /* special_function */
2163 "R_PPC64_ENTRY", /* name */
2164 FALSE, /* partial_inplace */
2165 0, /* src_mask */
2166 0, /* dst_mask */
2167 FALSE), /* pcrel_offset */
2168
2169 /* Like ADDR64, but use local entry point of function. */
2170 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2171 0, /* rightshift */
2172 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2173 64, /* bitsize */
2174 FALSE, /* pc_relative */
2175 0, /* bitpos */
2176 complain_overflow_dont, /* complain_on_overflow */
2177 bfd_elf_generic_reloc, /* special_function */
2178 "R_PPC64_ADDR64_LOCAL", /* name */
2179 FALSE, /* partial_inplace */
2180 0, /* src_mask */
2181 ONES (64), /* dst_mask */
2182 FALSE), /* pcrel_offset */
2183
2184 /* GNU extension to record C++ vtable hierarchy. */
2185 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2186 0, /* rightshift */
2187 0, /* size (0 = byte, 1 = short, 2 = long) */
2188 0, /* bitsize */
2189 FALSE, /* pc_relative */
2190 0, /* bitpos */
2191 complain_overflow_dont, /* complain_on_overflow */
2192 NULL, /* special_function */
2193 "R_PPC64_GNU_VTINHERIT", /* name */
2194 FALSE, /* partial_inplace */
2195 0, /* src_mask */
2196 0, /* dst_mask */
2197 FALSE), /* pcrel_offset */
2198
2199 /* GNU extension to record C++ vtable member usage. */
2200 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2201 0, /* rightshift */
2202 0, /* size (0 = byte, 1 = short, 2 = long) */
2203 0, /* bitsize */
2204 FALSE, /* pc_relative */
2205 0, /* bitpos */
2206 complain_overflow_dont, /* complain_on_overflow */
2207 NULL, /* special_function */
2208 "R_PPC64_GNU_VTENTRY", /* name */
2209 FALSE, /* partial_inplace */
2210 0, /* src_mask */
2211 0, /* dst_mask */
2212 FALSE), /* pcrel_offset */
2213 };
2214
2215 \f
2216 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2217 be done. */
2218
2219 static void
2220 ppc_howto_init (void)
2221 {
2222 unsigned int i, type;
2223
2224 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2225 {
2226 type = ppc64_elf_howto_raw[i].type;
2227 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2228 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2229 }
2230 }
2231
2232 static reloc_howto_type *
2233 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2234 bfd_reloc_code_real_type code)
2235 {
2236 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2237
2238 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2239 /* Initialize howto table if needed. */
2240 ppc_howto_init ();
2241
2242 switch (code)
2243 {
2244 default:
2245 return NULL;
2246
2247 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2248 break;
2249 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2250 break;
2251 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2252 break;
2253 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2254 break;
2255 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2256 break;
2257 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2258 break;
2259 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2260 break;
2261 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2262 break;
2263 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2264 break;
2265 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2266 break;
2267 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2268 break;
2269 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2270 break;
2271 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2272 break;
2273 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2274 break;
2275 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2276 break;
2277 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2278 break;
2279 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2280 break;
2281 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2282 break;
2283 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2284 break;
2285 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2286 break;
2287 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2288 break;
2289 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2290 break;
2291 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2292 break;
2293 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2294 break;
2295 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2296 break;
2297 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2298 break;
2299 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2300 break;
2301 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2302 break;
2303 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2304 break;
2305 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2306 break;
2307 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2308 break;
2309 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2310 break;
2311 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2312 break;
2313 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2314 break;
2315 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2316 break;
2317 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2318 break;
2319 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2320 break;
2321 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2322 break;
2323 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2324 break;
2325 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2326 break;
2327 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2328 break;
2329 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2330 break;
2331 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2332 break;
2333 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2334 break;
2335 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2336 break;
2337 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2338 break;
2339 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2340 break;
2341 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2342 break;
2343 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2346 break;
2347 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2348 break;
2349 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2350 break;
2351 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2352 break;
2353 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2354 break;
2355 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2356 break;
2357 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2358 break;
2359 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2360 break;
2361 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2362 break;
2363 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2364 break;
2365 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2366 break;
2367 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2368 break;
2369 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2370 break;
2371 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2372 break;
2373 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2374 break;
2375 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2376 break;
2377 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2378 break;
2379 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2380 break;
2381 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2382 break;
2383 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2384 break;
2385 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2386 break;
2387 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2388 break;
2389 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2390 break;
2391 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2392 break;
2393 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2394 break;
2395 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2396 break;
2397 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2398 break;
2399 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2400 break;
2401 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2402 break;
2403 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2408 break;
2409 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2410 break;
2411 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2412 break;
2413 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2414 break;
2415 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2416 break;
2417 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2418 break;
2419 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2420 break;
2421 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2422 break;
2423 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2424 break;
2425 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2426 break;
2427 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2428 break;
2429 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2434 break;
2435 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2436 break;
2437 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2438 break;
2439 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2440 break;
2441 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2442 break;
2443 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2444 break;
2445 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2446 break;
2447 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2448 break;
2449 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2450 break;
2451 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2452 break;
2453 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2454 break;
2455 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2456 break;
2457 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2458 break;
2459 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2460 break;
2461 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2462 break;
2463 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2464 break;
2465 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2466 break;
2467 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2468 break;
2469 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2470 break;
2471 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2472 break;
2473 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2474 break;
2475 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2476 break;
2477 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2478 break;
2479 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2480 break;
2481 }
2482
2483 return ppc64_elf_howto_table[r];
2484 };
2485
2486 static reloc_howto_type *
2487 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2488 const char *r_name)
2489 {
2490 unsigned int i;
2491
2492 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2493 if (ppc64_elf_howto_raw[i].name != NULL
2494 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2495 return &ppc64_elf_howto_raw[i];
2496
2497 return NULL;
2498 }
2499
2500 /* Set the howto pointer for a PowerPC ELF reloc. */
2501
2502 static void
2503 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2504 Elf_Internal_Rela *dst)
2505 {
2506 unsigned int type;
2507
2508 /* Initialize howto table if needed. */
2509 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2510 ppc_howto_init ();
2511
2512 type = ELF64_R_TYPE (dst->r_info);
2513 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2514 {
2515 /* xgettext:c-format */
2516 _bfd_error_handler (_("%B: invalid relocation type %d"),
2517 abfd, (int) type);
2518 type = R_PPC64_NONE;
2519 }
2520 cache_ptr->howto = ppc64_elf_howto_table[type];
2521 }
2522
2523 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2524
2525 static bfd_reloc_status_type
2526 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2527 void *data, asection *input_section,
2528 bfd *output_bfd, char **error_message)
2529 {
2530 enum elf_ppc64_reloc_type r_type;
2531 long insn;
2532 bfd_size_type octets;
2533 bfd_vma value;
2534
2535 /* If this is a relocatable link (output_bfd test tells us), just
2536 call the generic function. Any adjustment will be done at final
2537 link time. */
2538 if (output_bfd != NULL)
2539 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2540 input_section, output_bfd, error_message);
2541
2542 /* Adjust the addend for sign extension of the low 16 bits.
2543 We won't actually be using the low 16 bits, so trashing them
2544 doesn't matter. */
2545 reloc_entry->addend += 0x8000;
2546 r_type = reloc_entry->howto->type;
2547 if (r_type != R_PPC64_REL16DX_HA)
2548 return bfd_reloc_continue;
2549
2550 value = 0;
2551 if (!bfd_is_com_section (symbol->section))
2552 value = symbol->value;
2553 value += (reloc_entry->addend
2554 + symbol->section->output_offset
2555 + symbol->section->output_section->vma);
2556 value -= (reloc_entry->address
2557 + input_section->output_offset
2558 + input_section->output_section->vma);
2559 value = (bfd_signed_vma) value >> 16;
2560
2561 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2562 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2563 insn &= ~0x1fffc1;
2564 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2565 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2566 if (value + 0x8000 > 0xffff)
2567 return bfd_reloc_overflow;
2568 return bfd_reloc_ok;
2569 }
2570
2571 static bfd_reloc_status_type
2572 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2573 void *data, asection *input_section,
2574 bfd *output_bfd, char **error_message)
2575 {
2576 if (output_bfd != NULL)
2577 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2578 input_section, output_bfd, error_message);
2579
2580 if (strcmp (symbol->section->name, ".opd") == 0
2581 && (symbol->section->owner->flags & DYNAMIC) == 0)
2582 {
2583 bfd_vma dest = opd_entry_value (symbol->section,
2584 symbol->value + reloc_entry->addend,
2585 NULL, NULL, FALSE);
2586 if (dest != (bfd_vma) -1)
2587 reloc_entry->addend = dest - (symbol->value
2588 + symbol->section->output_section->vma
2589 + symbol->section->output_offset);
2590 }
2591 else
2592 {
2593 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2594
2595 if (symbol->section->owner != abfd
2596 && symbol->section->owner != NULL
2597 && abiversion (symbol->section->owner) >= 2)
2598 {
2599 unsigned int i;
2600
2601 for (i = 0; i < symbol->section->owner->symcount; ++i)
2602 {
2603 asymbol *symdef = symbol->section->owner->outsymbols[i];
2604
2605 if (strcmp (symdef->name, symbol->name) == 0)
2606 {
2607 elfsym = (elf_symbol_type *) symdef;
2608 break;
2609 }
2610 }
2611 }
2612 reloc_entry->addend
2613 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2614 }
2615 return bfd_reloc_continue;
2616 }
2617
2618 static bfd_reloc_status_type
2619 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2620 void *data, asection *input_section,
2621 bfd *output_bfd, char **error_message)
2622 {
2623 long insn;
2624 enum elf_ppc64_reloc_type r_type;
2625 bfd_size_type octets;
2626 /* Assume 'at' branch hints. */
2627 bfd_boolean is_isa_v2 = TRUE;
2628
2629 /* If this is a relocatable link (output_bfd test tells us), just
2630 call the generic function. Any adjustment will be done at final
2631 link time. */
2632 if (output_bfd != NULL)
2633 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2634 input_section, output_bfd, error_message);
2635
2636 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2637 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2638 insn &= ~(0x01 << 21);
2639 r_type = reloc_entry->howto->type;
2640 if (r_type == R_PPC64_ADDR14_BRTAKEN
2641 || r_type == R_PPC64_REL14_BRTAKEN)
2642 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2643
2644 if (is_isa_v2)
2645 {
2646 /* Set 'a' bit. This is 0b00010 in BO field for branch
2647 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2648 for branch on CTR insns (BO == 1a00t or 1a01t). */
2649 if ((insn & (0x14 << 21)) == (0x04 << 21))
2650 insn |= 0x02 << 21;
2651 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2652 insn |= 0x08 << 21;
2653 else
2654 goto out;
2655 }
2656 else
2657 {
2658 bfd_vma target = 0;
2659 bfd_vma from;
2660
2661 if (!bfd_is_com_section (symbol->section))
2662 target = symbol->value;
2663 target += symbol->section->output_section->vma;
2664 target += symbol->section->output_offset;
2665 target += reloc_entry->addend;
2666
2667 from = (reloc_entry->address
2668 + input_section->output_offset
2669 + input_section->output_section->vma);
2670
2671 /* Invert 'y' bit if not the default. */
2672 if ((bfd_signed_vma) (target - from) < 0)
2673 insn ^= 0x01 << 21;
2674 }
2675 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2676 out:
2677 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2678 input_section, output_bfd, error_message);
2679 }
2680
2681 static bfd_reloc_status_type
2682 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2683 void *data, asection *input_section,
2684 bfd *output_bfd, char **error_message)
2685 {
2686 /* If this is a relocatable link (output_bfd test tells us), just
2687 call the generic function. Any adjustment will be done at final
2688 link time. */
2689 if (output_bfd != NULL)
2690 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2691 input_section, output_bfd, error_message);
2692
2693 /* Subtract the symbol section base address. */
2694 reloc_entry->addend -= symbol->section->output_section->vma;
2695 return bfd_reloc_continue;
2696 }
2697
2698 static bfd_reloc_status_type
2699 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2700 void *data, asection *input_section,
2701 bfd *output_bfd, char **error_message)
2702 {
2703 /* If this is a relocatable link (output_bfd test tells us), just
2704 call the generic function. Any adjustment will be done at final
2705 link time. */
2706 if (output_bfd != NULL)
2707 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2708 input_section, output_bfd, error_message);
2709
2710 /* Subtract the symbol section base address. */
2711 reloc_entry->addend -= symbol->section->output_section->vma;
2712
2713 /* Adjust the addend for sign extension of the low 16 bits. */
2714 reloc_entry->addend += 0x8000;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722 {
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738 return bfd_reloc_continue;
2739 }
2740
2741 static bfd_reloc_status_type
2742 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2743 void *data, asection *input_section,
2744 bfd *output_bfd, char **error_message)
2745 {
2746 bfd_vma TOCstart;
2747
2748 /* If this is a relocatable link (output_bfd test tells us), just
2749 call the generic function. Any adjustment will be done at final
2750 link time. */
2751 if (output_bfd != NULL)
2752 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2753 input_section, output_bfd, error_message);
2754
2755 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2756 if (TOCstart == 0)
2757 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2758
2759 /* Subtract the TOC base address. */
2760 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2761
2762 /* Adjust the addend for sign extension of the low 16 bits. */
2763 reloc_entry->addend += 0x8000;
2764 return bfd_reloc_continue;
2765 }
2766
2767 static bfd_reloc_status_type
2768 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771 {
2772 bfd_vma TOCstart;
2773 bfd_size_type octets;
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 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2787 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2788 return bfd_reloc_ok;
2789 }
2790
2791 static bfd_reloc_status_type
2792 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2793 void *data, asection *input_section,
2794 bfd *output_bfd, char **error_message)
2795 {
2796 /* If this is a relocatable link (output_bfd test tells us), just
2797 call the generic function. Any adjustment will be done at final
2798 link time. */
2799 if (output_bfd != NULL)
2800 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2801 input_section, output_bfd, error_message);
2802
2803 if (error_message != NULL)
2804 {
2805 static char buf[60];
2806 sprintf (buf, "generic linker can't handle %s",
2807 reloc_entry->howto->name);
2808 *error_message = buf;
2809 }
2810 return bfd_reloc_dangerous;
2811 }
2812
2813 /* Track GOT entries needed for a given symbol. We might need more
2814 than one got entry per symbol. */
2815 struct got_entry
2816 {
2817 struct got_entry *next;
2818
2819 /* The symbol addend that we'll be placing in the GOT. */
2820 bfd_vma addend;
2821
2822 /* Unlike other ELF targets, we use separate GOT entries for the same
2823 symbol referenced from different input files. This is to support
2824 automatic multiple TOC/GOT sections, where the TOC base can vary
2825 from one input file to another. After partitioning into TOC groups
2826 we merge entries within the group.
2827
2828 Point to the BFD owning this GOT entry. */
2829 bfd *owner;
2830
2831 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2832 TLS_TPREL or TLS_DTPREL for tls entries. */
2833 unsigned char tls_type;
2834
2835 /* Non-zero if got.ent points to real entry. */
2836 unsigned char is_indirect;
2837
2838 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2839 union
2840 {
2841 bfd_signed_vma refcount;
2842 bfd_vma offset;
2843 struct got_entry *ent;
2844 } got;
2845 };
2846
2847 /* The same for PLT. */
2848 struct plt_entry
2849 {
2850 struct plt_entry *next;
2851
2852 bfd_vma addend;
2853
2854 union
2855 {
2856 bfd_signed_vma refcount;
2857 bfd_vma offset;
2858 } plt;
2859 };
2860
2861 struct ppc64_elf_obj_tdata
2862 {
2863 struct elf_obj_tdata elf;
2864
2865 /* Shortcuts to dynamic linker sections. */
2866 asection *got;
2867 asection *relgot;
2868
2869 /* Used during garbage collection. We attach global symbols defined
2870 on removed .opd entries to this section so that the sym is removed. */
2871 asection *deleted_section;
2872
2873 /* TLS local dynamic got entry handling. Support for multiple GOT
2874 sections means we potentially need one of these for each input bfd. */
2875 struct got_entry tlsld_got;
2876
2877 union {
2878 /* A copy of relocs before they are modified for --emit-relocs. */
2879 Elf_Internal_Rela *relocs;
2880
2881 /* Section contents. */
2882 bfd_byte *contents;
2883 } opd;
2884
2885 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2886 the reloc to be in the range -32768 to 32767. */
2887 unsigned int has_small_toc_reloc : 1;
2888
2889 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2890 instruction not one we handle. */
2891 unsigned int unexpected_toc_insn : 1;
2892 };
2893
2894 #define ppc64_elf_tdata(bfd) \
2895 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2896
2897 #define ppc64_tlsld_got(bfd) \
2898 (&ppc64_elf_tdata (bfd)->tlsld_got)
2899
2900 #define is_ppc64_elf(bfd) \
2901 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2902 && elf_object_id (bfd) == PPC64_ELF_DATA)
2903
2904 /* Override the generic function because we store some extras. */
2905
2906 static bfd_boolean
2907 ppc64_elf_mkobject (bfd *abfd)
2908 {
2909 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2910 PPC64_ELF_DATA);
2911 }
2912
2913 /* Fix bad default arch selected for a 64 bit input bfd when the
2914 default is 32 bit. Also select arch based on apuinfo. */
2915
2916 static bfd_boolean
2917 ppc64_elf_object_p (bfd *abfd)
2918 {
2919 if (!abfd->arch_info->the_default)
2920 return TRUE;
2921
2922 if (abfd->arch_info->bits_per_word == 32)
2923 {
2924 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2925
2926 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2927 {
2928 /* Relies on arch after 32 bit default being 64 bit default. */
2929 abfd->arch_info = abfd->arch_info->next;
2930 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2931 }
2932 }
2933 return _bfd_elf_ppc_set_arch (abfd);
2934 }
2935
2936 /* Support for core dump NOTE sections. */
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 size_t offset, size;
2942
2943 if (note->descsz != 504)
2944 return FALSE;
2945
2946 /* pr_cursig */
2947 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2948
2949 /* pr_pid */
2950 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2951
2952 /* pr_reg */
2953 offset = 112;
2954 size = 384;
2955
2956 /* Make a ".reg/999" section. */
2957 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2958 size, note->descpos + offset);
2959 }
2960
2961 static bfd_boolean
2962 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2963 {
2964 if (note->descsz != 136)
2965 return FALSE;
2966
2967 elf_tdata (abfd)->core->pid
2968 = bfd_get_32 (abfd, note->descdata + 24);
2969 elf_tdata (abfd)->core->program
2970 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2971 elf_tdata (abfd)->core->command
2972 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2973
2974 return TRUE;
2975 }
2976
2977 static char *
2978 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2979 ...)
2980 {
2981 switch (note_type)
2982 {
2983 default:
2984 return NULL;
2985
2986 case NT_PRPSINFO:
2987 {
2988 char data[136];
2989 va_list ap;
2990
2991 va_start (ap, note_type);
2992 memset (data, 0, sizeof (data));
2993 strncpy (data + 40, va_arg (ap, const char *), 16);
2994 strncpy (data + 56, va_arg (ap, const char *), 80);
2995 va_end (ap);
2996 return elfcore_write_note (abfd, buf, bufsiz,
2997 "CORE", note_type, data, sizeof (data));
2998 }
2999
3000 case NT_PRSTATUS:
3001 {
3002 char data[504];
3003 va_list ap;
3004 long pid;
3005 int cursig;
3006 const void *greg;
3007
3008 va_start (ap, note_type);
3009 memset (data, 0, 112);
3010 pid = va_arg (ap, long);
3011 bfd_put_32 (abfd, pid, data + 32);
3012 cursig = va_arg (ap, int);
3013 bfd_put_16 (abfd, cursig, data + 12);
3014 greg = va_arg (ap, const void *);
3015 memcpy (data + 112, greg, 384);
3016 memset (data + 496, 0, 8);
3017 va_end (ap);
3018 return elfcore_write_note (abfd, buf, bufsiz,
3019 "CORE", note_type, data, sizeof (data));
3020 }
3021 }
3022 }
3023
3024 /* Add extra PPC sections. */
3025
3026 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3027 {
3028 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3029 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3030 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3031 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3032 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3033 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3034 { NULL, 0, 0, 0, 0 }
3035 };
3036
3037 enum _ppc64_sec_type {
3038 sec_normal = 0,
3039 sec_opd = 1,
3040 sec_toc = 2
3041 };
3042
3043 struct _ppc64_elf_section_data
3044 {
3045 struct bfd_elf_section_data elf;
3046
3047 union
3048 {
3049 /* An array with one entry for each opd function descriptor,
3050 and some spares since opd entries may be either 16 or 24 bytes. */
3051 #define OPD_NDX(OFF) ((OFF) >> 4)
3052 struct _opd_sec_data
3053 {
3054 /* Points to the function code section for local opd entries. */
3055 asection **func_sec;
3056
3057 /* After editing .opd, adjust references to opd local syms. */
3058 long *adjust;
3059 } opd;
3060
3061 /* An array for toc sections, indexed by offset/8. */
3062 struct _toc_sec_data
3063 {
3064 /* Specifies the relocation symbol index used at a given toc offset. */
3065 unsigned *symndx;
3066
3067 /* And the relocation addend. */
3068 bfd_vma *add;
3069 } toc;
3070 } u;
3071
3072 enum _ppc64_sec_type sec_type:2;
3073
3074 /* Flag set when small branches are detected. Used to
3075 select suitable defaults for the stub group size. */
3076 unsigned int has_14bit_branch:1;
3077 };
3078
3079 #define ppc64_elf_section_data(sec) \
3080 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3081
3082 static bfd_boolean
3083 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3084 {
3085 if (!sec->used_by_bfd)
3086 {
3087 struct _ppc64_elf_section_data *sdata;
3088 bfd_size_type amt = sizeof (*sdata);
3089
3090 sdata = bfd_zalloc (abfd, amt);
3091 if (sdata == NULL)
3092 return FALSE;
3093 sec->used_by_bfd = sdata;
3094 }
3095
3096 return _bfd_elf_new_section_hook (abfd, sec);
3097 }
3098
3099 static struct _opd_sec_data *
3100 get_opd_info (asection * sec)
3101 {
3102 if (sec != NULL
3103 && ppc64_elf_section_data (sec) != NULL
3104 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3105 return &ppc64_elf_section_data (sec)->u.opd;
3106 return NULL;
3107 }
3108 \f
3109 /* Parameters for the qsort hook. */
3110 static bfd_boolean synthetic_relocatable;
3111 static asection *synthetic_opd;
3112
3113 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3114
3115 static int
3116 compare_symbols (const void *ap, const void *bp)
3117 {
3118 const asymbol *a = * (const asymbol **) ap;
3119 const asymbol *b = * (const asymbol **) bp;
3120
3121 /* Section symbols first. */
3122 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3123 return -1;
3124 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3125 return 1;
3126
3127 /* then .opd symbols. */
3128 if (synthetic_opd != NULL)
3129 {
3130 if (strcmp (a->section->name, ".opd") == 0
3131 && strcmp (b->section->name, ".opd") != 0)
3132 return -1;
3133 if (strcmp (a->section->name, ".opd") != 0
3134 && strcmp (b->section->name, ".opd") == 0)
3135 return 1;
3136 }
3137
3138 /* then other code symbols. */
3139 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3140 == (SEC_CODE | SEC_ALLOC)
3141 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3142 != (SEC_CODE | SEC_ALLOC))
3143 return -1;
3144
3145 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3146 != (SEC_CODE | SEC_ALLOC)
3147 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3148 == (SEC_CODE | SEC_ALLOC))
3149 return 1;
3150
3151 if (synthetic_relocatable)
3152 {
3153 if (a->section->id < b->section->id)
3154 return -1;
3155
3156 if (a->section->id > b->section->id)
3157 return 1;
3158 }
3159
3160 if (a->value + a->section->vma < b->value + b->section->vma)
3161 return -1;
3162
3163 if (a->value + a->section->vma > b->value + b->section->vma)
3164 return 1;
3165
3166 /* For syms with the same value, prefer strong dynamic global function
3167 syms over other syms. */
3168 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3169 return -1;
3170
3171 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3172 return 1;
3173
3174 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3175 return -1;
3176
3177 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3178 return 1;
3179
3180 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3181 return -1;
3182
3183 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3184 return 1;
3185
3186 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3187 return -1;
3188
3189 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3190 return 1;
3191
3192 return a > b;
3193 }
3194
3195 /* Search SYMS for a symbol of the given VALUE. */
3196
3197 static asymbol *
3198 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3199 {
3200 long mid;
3201
3202 if (id == (unsigned) -1)
3203 {
3204 while (lo < hi)
3205 {
3206 mid = (lo + hi) >> 1;
3207 if (syms[mid]->value + syms[mid]->section->vma < value)
3208 lo = mid + 1;
3209 else if (syms[mid]->value + syms[mid]->section->vma > value)
3210 hi = mid;
3211 else
3212 return syms[mid];
3213 }
3214 }
3215 else
3216 {
3217 while (lo < hi)
3218 {
3219 mid = (lo + hi) >> 1;
3220 if (syms[mid]->section->id < id)
3221 lo = mid + 1;
3222 else if (syms[mid]->section->id > id)
3223 hi = mid;
3224 else if (syms[mid]->value < value)
3225 lo = mid + 1;
3226 else if (syms[mid]->value > value)
3227 hi = mid;
3228 else
3229 return syms[mid];
3230 }
3231 }
3232 return NULL;
3233 }
3234
3235 static bfd_boolean
3236 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3237 {
3238 bfd_vma vma = *(bfd_vma *) ptr;
3239 return ((section->flags & SEC_ALLOC) != 0
3240 && section->vma <= vma
3241 && vma < section->vma + section->size);
3242 }
3243
3244 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3245 entry syms. Also generate @plt symbols for the glink branch table.
3246 Returns count of synthetic symbols in RET or -1 on error. */
3247
3248 static long
3249 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3250 long static_count, asymbol **static_syms,
3251 long dyn_count, asymbol **dyn_syms,
3252 asymbol **ret)
3253 {
3254 asymbol *s;
3255 long i;
3256 long count;
3257 char *names;
3258 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3259 asection *opd = NULL;
3260 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3261 asymbol **syms;
3262 int abi = abiversion (abfd);
3263
3264 *ret = NULL;
3265
3266 if (abi < 2)
3267 {
3268 opd = bfd_get_section_by_name (abfd, ".opd");
3269 if (opd == NULL && abi == 1)
3270 return 0;
3271 }
3272
3273 symcount = static_count;
3274 if (!relocatable)
3275 symcount += dyn_count;
3276 if (symcount == 0)
3277 return 0;
3278
3279 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3280 if (syms == NULL)
3281 return -1;
3282
3283 if (!relocatable && static_count != 0 && dyn_count != 0)
3284 {
3285 /* Use both symbol tables. */
3286 memcpy (syms, static_syms, static_count * sizeof (*syms));
3287 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3288 }
3289 else if (!relocatable && static_count == 0)
3290 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3291 else
3292 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3293
3294 synthetic_relocatable = relocatable;
3295 synthetic_opd = opd;
3296 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3297
3298 if (!relocatable && symcount > 1)
3299 {
3300 long j;
3301 /* Trim duplicate syms, since we may have merged the normal and
3302 dynamic symbols. Actually, we only care about syms that have
3303 different values, so trim any with the same value. */
3304 for (i = 1, j = 1; i < symcount; ++i)
3305 if (syms[i - 1]->value + syms[i - 1]->section->vma
3306 != syms[i]->value + syms[i]->section->vma)
3307 syms[j++] = syms[i];
3308 symcount = j;
3309 }
3310
3311 i = 0;
3312 /* Note that here and in compare_symbols we can't compare opd and
3313 sym->section directly. With separate debug info files, the
3314 symbols will be extracted from the debug file while abfd passed
3315 to this function is the real binary. */
3316 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3317 ++i;
3318 codesecsym = i;
3319
3320 for (; i < symcount; ++i)
3321 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3322 != (SEC_CODE | SEC_ALLOC))
3323 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3324 break;
3325 codesecsymend = i;
3326
3327 for (; i < symcount; ++i)
3328 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3329 break;
3330 secsymend = i;
3331
3332 if (opd != NULL)
3333 for (; i < symcount; ++i)
3334 if (strcmp (syms[i]->section->name, ".opd") != 0)
3335 break;
3336 opdsymend = i;
3337
3338 for (; i < symcount; ++i)
3339 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3340 != (SEC_CODE | SEC_ALLOC))
3341 break;
3342 symcount = i;
3343
3344 count = 0;
3345
3346 if (relocatable)
3347 {
3348 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3349 arelent *r;
3350 size_t size;
3351 long relcount;
3352
3353 if (opdsymend == secsymend)
3354 goto done;
3355
3356 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3357 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3358 if (relcount == 0)
3359 goto done;
3360
3361 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3362 {
3363 count = -1;
3364 goto done;
3365 }
3366
3367 size = 0;
3368 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3369 {
3370 asymbol *sym;
3371
3372 while (r < opd->relocation + relcount
3373 && r->address < syms[i]->value + opd->vma)
3374 ++r;
3375
3376 if (r == opd->relocation + relcount)
3377 break;
3378
3379 if (r->address != syms[i]->value + opd->vma)
3380 continue;
3381
3382 if (r->howto->type != R_PPC64_ADDR64)
3383 continue;
3384
3385 sym = *r->sym_ptr_ptr;
3386 if (!sym_exists_at (syms, opdsymend, symcount,
3387 sym->section->id, sym->value + r->addend))
3388 {
3389 ++count;
3390 size += sizeof (asymbol);
3391 size += strlen (syms[i]->name) + 2;
3392 }
3393 }
3394
3395 if (size == 0)
3396 goto done;
3397 s = *ret = bfd_malloc (size);
3398 if (s == NULL)
3399 {
3400 count = -1;
3401 goto done;
3402 }
3403
3404 names = (char *) (s + count);
3405
3406 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3407 {
3408 asymbol *sym;
3409
3410 while (r < opd->relocation + relcount
3411 && r->address < syms[i]->value + opd->vma)
3412 ++r;
3413
3414 if (r == opd->relocation + relcount)
3415 break;
3416
3417 if (r->address != syms[i]->value + opd->vma)
3418 continue;
3419
3420 if (r->howto->type != R_PPC64_ADDR64)
3421 continue;
3422
3423 sym = *r->sym_ptr_ptr;
3424 if (!sym_exists_at (syms, opdsymend, symcount,
3425 sym->section->id, sym->value + r->addend))
3426 {
3427 size_t len;
3428
3429 *s = *syms[i];
3430 s->flags |= BSF_SYNTHETIC;
3431 s->section = sym->section;
3432 s->value = sym->value + r->addend;
3433 s->name = names;
3434 *names++ = '.';
3435 len = strlen (syms[i]->name);
3436 memcpy (names, syms[i]->name, len + 1);
3437 names += len + 1;
3438 /* Have udata.p point back to the original symbol this
3439 synthetic symbol was derived from. */
3440 s->udata.p = syms[i];
3441 s++;
3442 }
3443 }
3444 }
3445 else
3446 {
3447 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3448 bfd_byte *contents = NULL;
3449 size_t size;
3450 long plt_count = 0;
3451 bfd_vma glink_vma = 0, resolv_vma = 0;
3452 asection *dynamic, *glink = NULL, *relplt = NULL;
3453 arelent *p;
3454
3455 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3456 {
3457 free_contents_and_exit_err:
3458 count = -1;
3459 free_contents_and_exit:
3460 if (contents)
3461 free (contents);
3462 goto done;
3463 }
3464
3465 size = 0;
3466 for (i = secsymend; i < opdsymend; ++i)
3467 {
3468 bfd_vma ent;
3469
3470 /* Ignore bogus symbols. */
3471 if (syms[i]->value > opd->size - 8)
3472 continue;
3473
3474 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3475 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3476 {
3477 ++count;
3478 size += sizeof (asymbol);
3479 size += strlen (syms[i]->name) + 2;
3480 }
3481 }
3482
3483 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3484 if (dyn_count != 0
3485 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3486 {
3487 bfd_byte *dynbuf, *extdyn, *extdynend;
3488 size_t extdynsize;
3489 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3490
3491 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3492 goto free_contents_and_exit_err;
3493
3494 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3495 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3496
3497 extdyn = dynbuf;
3498 extdynend = extdyn + dynamic->size;
3499 for (; extdyn < extdynend; extdyn += extdynsize)
3500 {
3501 Elf_Internal_Dyn dyn;
3502 (*swap_dyn_in) (abfd, extdyn, &dyn);
3503
3504 if (dyn.d_tag == DT_NULL)
3505 break;
3506
3507 if (dyn.d_tag == DT_PPC64_GLINK)
3508 {
3509 /* The first glink stub starts at offset 32; see
3510 comment in ppc64_elf_finish_dynamic_sections. */
3511 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3512 /* The .glink section usually does not survive the final
3513 link; search for the section (usually .text) where the
3514 glink stubs now reside. */
3515 glink = bfd_sections_find_if (abfd, section_covers_vma,
3516 &glink_vma);
3517 break;
3518 }
3519 }
3520
3521 free (dynbuf);
3522 }
3523
3524 if (glink != NULL)
3525 {
3526 /* Determine __glink trampoline by reading the relative branch
3527 from the first glink stub. */
3528 bfd_byte buf[4];
3529 unsigned int off = 0;
3530
3531 while (bfd_get_section_contents (abfd, glink, buf,
3532 glink_vma + off - glink->vma, 4))
3533 {
3534 unsigned int insn = bfd_get_32 (abfd, buf);
3535 insn ^= B_DOT;
3536 if ((insn & ~0x3fffffc) == 0)
3537 {
3538 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3539 break;
3540 }
3541 off += 4;
3542 if (off > 4)
3543 break;
3544 }
3545
3546 if (resolv_vma)
3547 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3548
3549 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3550 if (relplt != NULL)
3551 {
3552 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3553 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3554 goto free_contents_and_exit_err;
3555
3556 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3557 size += plt_count * sizeof (asymbol);
3558
3559 p = relplt->relocation;
3560 for (i = 0; i < plt_count; i++, p++)
3561 {
3562 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3563 if (p->addend != 0)
3564 size += sizeof ("+0x") - 1 + 16;
3565 }
3566 }
3567 }
3568
3569 if (size == 0)
3570 goto free_contents_and_exit;
3571 s = *ret = bfd_malloc (size);
3572 if (s == NULL)
3573 goto free_contents_and_exit_err;
3574
3575 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3576
3577 for (i = secsymend; i < opdsymend; ++i)
3578 {
3579 bfd_vma ent;
3580
3581 if (syms[i]->value > opd->size - 8)
3582 continue;
3583
3584 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3585 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3586 {
3587 long lo, hi;
3588 size_t len;
3589 asection *sec = abfd->sections;
3590
3591 *s = *syms[i];
3592 lo = codesecsym;
3593 hi = codesecsymend;
3594 while (lo < hi)
3595 {
3596 long mid = (lo + hi) >> 1;
3597 if (syms[mid]->section->vma < ent)
3598 lo = mid + 1;
3599 else if (syms[mid]->section->vma > ent)
3600 hi = mid;
3601 else
3602 {
3603 sec = syms[mid]->section;
3604 break;
3605 }
3606 }
3607
3608 if (lo >= hi && lo > codesecsym)
3609 sec = syms[lo - 1]->section;
3610
3611 for (; sec != NULL; sec = sec->next)
3612 {
3613 if (sec->vma > ent)
3614 break;
3615 /* SEC_LOAD may not be set if SEC is from a separate debug
3616 info file. */
3617 if ((sec->flags & SEC_ALLOC) == 0)
3618 break;
3619 if ((sec->flags & SEC_CODE) != 0)
3620 s->section = sec;
3621 }
3622 s->flags |= BSF_SYNTHETIC;
3623 s->value = ent - s->section->vma;
3624 s->name = names;
3625 *names++ = '.';
3626 len = strlen (syms[i]->name);
3627 memcpy (names, syms[i]->name, len + 1);
3628 names += len + 1;
3629 /* Have udata.p point back to the original symbol this
3630 synthetic symbol was derived from. */
3631 s->udata.p = syms[i];
3632 s++;
3633 }
3634 }
3635 free (contents);
3636
3637 if (glink != NULL && relplt != NULL)
3638 {
3639 if (resolv_vma)
3640 {
3641 /* Add a symbol for the main glink trampoline. */
3642 memset (s, 0, sizeof *s);
3643 s->the_bfd = abfd;
3644 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3645 s->section = glink;
3646 s->value = resolv_vma - glink->vma;
3647 s->name = names;
3648 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3649 names += sizeof ("__glink_PLTresolve");
3650 s++;
3651 count++;
3652 }
3653
3654 /* FIXME: It would be very much nicer to put sym@plt on the
3655 stub rather than on the glink branch table entry. The
3656 objdump disassembler would then use a sensible symbol
3657 name on plt calls. The difficulty in doing so is
3658 a) finding the stubs, and,
3659 b) matching stubs against plt entries, and,
3660 c) there can be multiple stubs for a given plt entry.
3661
3662 Solving (a) could be done by code scanning, but older
3663 ppc64 binaries used different stubs to current code.
3664 (b) is the tricky one since you need to known the toc
3665 pointer for at least one function that uses a pic stub to
3666 be able to calculate the plt address referenced.
3667 (c) means gdb would need to set multiple breakpoints (or
3668 find the glink branch itself) when setting breakpoints
3669 for pending shared library loads. */
3670 p = relplt->relocation;
3671 for (i = 0; i < plt_count; i++, p++)
3672 {
3673 size_t len;
3674
3675 *s = **p->sym_ptr_ptr;
3676 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3677 we are defining a symbol, ensure one of them is set. */
3678 if ((s->flags & BSF_LOCAL) == 0)
3679 s->flags |= BSF_GLOBAL;
3680 s->flags |= BSF_SYNTHETIC;
3681 s->section = glink;
3682 s->value = glink_vma - glink->vma;
3683 s->name = names;
3684 s->udata.p = NULL;
3685 len = strlen ((*p->sym_ptr_ptr)->name);
3686 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3687 names += len;
3688 if (p->addend != 0)
3689 {
3690 memcpy (names, "+0x", sizeof ("+0x") - 1);
3691 names += sizeof ("+0x") - 1;
3692 bfd_sprintf_vma (abfd, names, p->addend);
3693 names += strlen (names);
3694 }
3695 memcpy (names, "@plt", sizeof ("@plt"));
3696 names += sizeof ("@plt");
3697 s++;
3698 if (abi < 2)
3699 {
3700 glink_vma += 8;
3701 if (i >= 0x8000)
3702 glink_vma += 4;
3703 }
3704 else
3705 glink_vma += 4;
3706 }
3707 count += plt_count;
3708 }
3709 }
3710
3711 done:
3712 free (syms);
3713 return count;
3714 }
3715 \f
3716 /* The following functions are specific to the ELF linker, while
3717 functions above are used generally. Those named ppc64_elf_* are
3718 called by the main ELF linker code. They appear in this file more
3719 or less in the order in which they are called. eg.
3720 ppc64_elf_check_relocs is called early in the link process,
3721 ppc64_elf_finish_dynamic_sections is one of the last functions
3722 called.
3723
3724 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3725 functions have both a function code symbol and a function descriptor
3726 symbol. A call to foo in a relocatable object file looks like:
3727
3728 . .text
3729 . x:
3730 . bl .foo
3731 . nop
3732
3733 The function definition in another object file might be:
3734
3735 . .section .opd
3736 . foo: .quad .foo
3737 . .quad .TOC.@tocbase
3738 . .quad 0
3739 .
3740 . .text
3741 . .foo: blr
3742
3743 When the linker resolves the call during a static link, the branch
3744 unsurprisingly just goes to .foo and the .opd information is unused.
3745 If the function definition is in a shared library, things are a little
3746 different: The call goes via a plt call stub, the opd information gets
3747 copied to the plt, and the linker patches the nop.
3748
3749 . x:
3750 . bl .foo_stub
3751 . ld 2,40(1)
3752 .
3753 .
3754 . .foo_stub:
3755 . std 2,40(1) # in practice, the call stub
3756 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3757 . addi 11,11,Lfoo@toc@l # this is the general idea
3758 . ld 12,0(11)
3759 . ld 2,8(11)
3760 . mtctr 12
3761 . ld 11,16(11)
3762 . bctr
3763 .
3764 . .section .plt
3765 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3766
3767 The "reloc ()" notation is supposed to indicate that the linker emits
3768 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3769 copying.
3770
3771 What are the difficulties here? Well, firstly, the relocations
3772 examined by the linker in check_relocs are against the function code
3773 sym .foo, while the dynamic relocation in the plt is emitted against
3774 the function descriptor symbol, foo. Somewhere along the line, we need
3775 to carefully copy dynamic link information from one symbol to the other.
3776 Secondly, the generic part of the elf linker will make .foo a dynamic
3777 symbol as is normal for most other backends. We need foo dynamic
3778 instead, at least for an application final link. However, when
3779 creating a shared library containing foo, we need to have both symbols
3780 dynamic so that references to .foo are satisfied during the early
3781 stages of linking. Otherwise the linker might decide to pull in a
3782 definition from some other object, eg. a static library.
3783
3784 Update: As of August 2004, we support a new convention. Function
3785 calls may use the function descriptor symbol, ie. "bl foo". This
3786 behaves exactly as "bl .foo". */
3787
3788 /* Of those relocs that might be copied as dynamic relocs, this function
3789 selects those that must be copied when linking a shared library,
3790 even when the symbol is local. */
3791
3792 static int
3793 must_be_dyn_reloc (struct bfd_link_info *info,
3794 enum elf_ppc64_reloc_type r_type)
3795 {
3796 switch (r_type)
3797 {
3798 default:
3799 return 1;
3800
3801 case R_PPC64_REL32:
3802 case R_PPC64_REL64:
3803 case R_PPC64_REL30:
3804 return 0;
3805
3806 case R_PPC64_TPREL16:
3807 case R_PPC64_TPREL16_LO:
3808 case R_PPC64_TPREL16_HI:
3809 case R_PPC64_TPREL16_HA:
3810 case R_PPC64_TPREL16_DS:
3811 case R_PPC64_TPREL16_LO_DS:
3812 case R_PPC64_TPREL16_HIGH:
3813 case R_PPC64_TPREL16_HIGHA:
3814 case R_PPC64_TPREL16_HIGHER:
3815 case R_PPC64_TPREL16_HIGHERA:
3816 case R_PPC64_TPREL16_HIGHEST:
3817 case R_PPC64_TPREL16_HIGHESTA:
3818 case R_PPC64_TPREL64:
3819 return !bfd_link_executable (info);
3820 }
3821 }
3822
3823 /* Whether an undefined weak symbol should resolve to its link-time
3824 value, even in PIC or PIE objects. */
3825 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
3826 ((H)->root.type == bfd_link_hash_undefweak \
3827 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
3828 || (INFO)->dynamic_undefined_weak == 0))
3829
3830 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3831 copying dynamic variables from a shared lib into an app's dynbss
3832 section, and instead use a dynamic relocation to point into the
3833 shared lib. With code that gcc generates, it's vital that this be
3834 enabled; In the PowerPC64 ABI, the address of a function is actually
3835 the address of a function descriptor, which resides in the .opd
3836 section. gcc uses the descriptor directly rather than going via the
3837 GOT as some other ABI's do, which means that initialized function
3838 pointers must reference the descriptor. Thus, a function pointer
3839 initialized to the address of a function in a shared library will
3840 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3841 redefines the function descriptor symbol to point to the copy. This
3842 presents a problem as a plt entry for that function is also
3843 initialized from the function descriptor symbol and the copy reloc
3844 may not be initialized first. */
3845 #define ELIMINATE_COPY_RELOCS 1
3846
3847 /* Section name for stubs is the associated section name plus this
3848 string. */
3849 #define STUB_SUFFIX ".stub"
3850
3851 /* Linker stubs.
3852 ppc_stub_long_branch:
3853 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3854 destination, but a 24 bit branch in a stub section will reach.
3855 . b dest
3856
3857 ppc_stub_plt_branch:
3858 Similar to the above, but a 24 bit branch in the stub section won't
3859 reach its destination.
3860 . addis %r11,%r2,xxx@toc@ha
3861 . ld %r12,xxx@toc@l(%r11)
3862 . mtctr %r12
3863 . bctr
3864
3865 ppc_stub_plt_call:
3866 Used to call a function in a shared library. If it so happens that
3867 the plt entry referenced crosses a 64k boundary, then an extra
3868 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3869 . std %r2,40(%r1)
3870 . addis %r11,%r2,xxx@toc@ha
3871 . ld %r12,xxx+0@toc@l(%r11)
3872 . mtctr %r12
3873 . ld %r2,xxx+8@toc@l(%r11)
3874 . ld %r11,xxx+16@toc@l(%r11)
3875 . bctr
3876
3877 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3878 code to adjust the value and save r2 to support multiple toc sections.
3879 A ppc_stub_long_branch with an r2 offset looks like:
3880 . std %r2,40(%r1)
3881 . addis %r2,%r2,off@ha
3882 . addi %r2,%r2,off@l
3883 . b dest
3884
3885 A ppc_stub_plt_branch with an r2 offset looks like:
3886 . std %r2,40(%r1)
3887 . addis %r11,%r2,xxx@toc@ha
3888 . ld %r12,xxx@toc@l(%r11)
3889 . addis %r2,%r2,off@ha
3890 . addi %r2,%r2,off@l
3891 . mtctr %r12
3892 . bctr
3893
3894 In cases where the "addis" instruction would add zero, the "addis" is
3895 omitted and following instructions modified slightly in some cases.
3896 */
3897
3898 enum ppc_stub_type {
3899 ppc_stub_none,
3900 ppc_stub_long_branch,
3901 ppc_stub_long_branch_r2off,
3902 ppc_stub_plt_branch,
3903 ppc_stub_plt_branch_r2off,
3904 ppc_stub_plt_call,
3905 ppc_stub_plt_call_r2save,
3906 ppc_stub_global_entry,
3907 ppc_stub_save_res
3908 };
3909
3910 /* Information on stub grouping. */
3911 struct map_stub
3912 {
3913 /* The stub section. */
3914 asection *stub_sec;
3915 /* This is the section to which stubs in the group will be attached. */
3916 asection *link_sec;
3917 /* Next group. */
3918 struct map_stub *next;
3919 /* Whether to emit a copy of register save/restore functions in this
3920 group. */
3921 int needs_save_res;
3922 };
3923
3924 struct ppc_stub_hash_entry {
3925
3926 /* Base hash table entry structure. */
3927 struct bfd_hash_entry root;
3928
3929 enum ppc_stub_type stub_type;
3930
3931 /* Group information. */
3932 struct map_stub *group;
3933
3934 /* Offset within stub_sec of the beginning of this stub. */
3935 bfd_vma stub_offset;
3936
3937 /* Given the symbol's value and its section we can determine its final
3938 value when building the stubs (so the stub knows where to jump. */
3939 bfd_vma target_value;
3940 asection *target_section;
3941
3942 /* The symbol table entry, if any, that this was derived from. */
3943 struct ppc_link_hash_entry *h;
3944 struct plt_entry *plt_ent;
3945
3946 /* Symbol st_other. */
3947 unsigned char other;
3948 };
3949
3950 struct ppc_branch_hash_entry {
3951
3952 /* Base hash table entry structure. */
3953 struct bfd_hash_entry root;
3954
3955 /* Offset within branch lookup table. */
3956 unsigned int offset;
3957
3958 /* Generation marker. */
3959 unsigned int iter;
3960 };
3961
3962 /* Used to track dynamic relocations for local symbols. */
3963 struct ppc_dyn_relocs
3964 {
3965 struct ppc_dyn_relocs *next;
3966
3967 /* The input section of the reloc. */
3968 asection *sec;
3969
3970 /* Total number of relocs copied for the input section. */
3971 unsigned int count : 31;
3972
3973 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3974 unsigned int ifunc : 1;
3975 };
3976
3977 struct ppc_link_hash_entry
3978 {
3979 struct elf_link_hash_entry elf;
3980
3981 union {
3982 /* A pointer to the most recently used stub hash entry against this
3983 symbol. */
3984 struct ppc_stub_hash_entry *stub_cache;
3985
3986 /* A pointer to the next symbol starting with a '.' */
3987 struct ppc_link_hash_entry *next_dot_sym;
3988 } u;
3989
3990 /* Track dynamic relocs copied for this symbol. */
3991 struct elf_dyn_relocs *dyn_relocs;
3992
3993 /* Chain of aliases referring to a weakdef. */
3994 struct ppc_link_hash_entry *weakref;
3995
3996 /* Link between function code and descriptor symbols. */
3997 struct ppc_link_hash_entry *oh;
3998
3999 /* Flag function code and descriptor symbols. */
4000 unsigned int is_func:1;
4001 unsigned int is_func_descriptor:1;
4002 unsigned int fake:1;
4003
4004 /* Whether global opd/toc sym has been adjusted or not.
4005 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4006 should be set for all globals defined in any opd/toc section. */
4007 unsigned int adjust_done:1;
4008
4009 /* Set if this is an out-of-line register save/restore function,
4010 with non-standard calling convention. */
4011 unsigned int save_res:1;
4012
4013 /* Contexts in which symbol is used in the GOT (or TOC).
4014 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4015 corresponding relocs are encountered during check_relocs.
4016 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4017 indicate the corresponding GOT entry type is not needed.
4018 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4019 a TPREL one. We use a separate flag rather than setting TPREL
4020 just for convenience in distinguishing the two cases. */
4021 #define TLS_GD 1 /* GD reloc. */
4022 #define TLS_LD 2 /* LD reloc. */
4023 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4024 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4025 #define TLS_TLS 16 /* Any TLS reloc. */
4026 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4027 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4028 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4029 unsigned char tls_mask;
4030 };
4031
4032 /* ppc64 ELF linker hash table. */
4033
4034 struct ppc_link_hash_table
4035 {
4036 struct elf_link_hash_table elf;
4037
4038 /* The stub hash table. */
4039 struct bfd_hash_table stub_hash_table;
4040
4041 /* Another hash table for plt_branch stubs. */
4042 struct bfd_hash_table branch_hash_table;
4043
4044 /* Hash table for function prologue tocsave. */
4045 htab_t tocsave_htab;
4046
4047 /* Various options and other info passed from the linker. */
4048 struct ppc64_elf_params *params;
4049
4050 /* The size of sec_info below. */
4051 unsigned int sec_info_arr_size;
4052
4053 /* Per-section array of extra section info. Done this way rather
4054 than as part of ppc64_elf_section_data so we have the info for
4055 non-ppc64 sections. */
4056 struct
4057 {
4058 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4059 bfd_vma toc_off;
4060
4061 union
4062 {
4063 /* The section group that this section belongs to. */
4064 struct map_stub *group;
4065 /* A temp section list pointer. */
4066 asection *list;
4067 } u;
4068 } *sec_info;
4069
4070 /* Linked list of groups. */
4071 struct map_stub *group;
4072
4073 /* Temp used when calculating TOC pointers. */
4074 bfd_vma toc_curr;
4075 bfd *toc_bfd;
4076 asection *toc_first_sec;
4077
4078 /* Used when adding symbols. */
4079 struct ppc_link_hash_entry *dot_syms;
4080
4081 /* Shortcuts to get to dynamic linker sections. */
4082 asection *glink;
4083 asection *sfpr;
4084 asection *brlt;
4085 asection *relbrlt;
4086 asection *glink_eh_frame;
4087
4088 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4089 struct ppc_link_hash_entry *tls_get_addr;
4090 struct ppc_link_hash_entry *tls_get_addr_fd;
4091
4092 /* The size of reliplt used by got entry relocs. */
4093 bfd_size_type got_reli_size;
4094
4095 /* Statistics. */
4096 unsigned long stub_count[ppc_stub_global_entry];
4097
4098 /* Number of stubs against global syms. */
4099 unsigned long stub_globals;
4100
4101 /* Set if we're linking code with function descriptors. */
4102 unsigned int opd_abi:1;
4103
4104 /* Support for multiple toc sections. */
4105 unsigned int do_multi_toc:1;
4106 unsigned int multi_toc_needed:1;
4107 unsigned int second_toc_pass:1;
4108 unsigned int do_toc_opt:1;
4109
4110 /* Set on error. */
4111 unsigned int stub_error:1;
4112
4113 /* Whether func_desc_adjust needs to be run over symbols. */
4114 unsigned int need_func_desc_adj:1;
4115
4116 /* Whether there exist local gnu indirect function resolvers,
4117 referenced by dynamic relocations. */
4118 unsigned int local_ifunc_resolver:1;
4119 unsigned int maybe_local_ifunc_resolver:1;
4120
4121 /* Incremented every time we size stubs. */
4122 unsigned int stub_iteration;
4123
4124 /* Small local sym cache. */
4125 struct sym_cache sym_cache;
4126 };
4127
4128 /* Rename some of the generic section flags to better document how they
4129 are used here. */
4130
4131 /* Nonzero if this section has TLS related relocations. */
4132 #define has_tls_reloc sec_flg0
4133
4134 /* Nonzero if this section has a call to __tls_get_addr. */
4135 #define has_tls_get_addr_call sec_flg1
4136
4137 /* Nonzero if this section has any toc or got relocs. */
4138 #define has_toc_reloc sec_flg2
4139
4140 /* Nonzero if this section has a call to another section that uses
4141 the toc or got. */
4142 #define makes_toc_func_call sec_flg3
4143
4144 /* Recursion protection when determining above flag. */
4145 #define call_check_in_progress sec_flg4
4146 #define call_check_done sec_flg5
4147
4148 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4149
4150 #define ppc_hash_table(p) \
4151 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4152 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4153
4154 #define ppc_stub_hash_lookup(table, string, create, copy) \
4155 ((struct ppc_stub_hash_entry *) \
4156 bfd_hash_lookup ((table), (string), (create), (copy)))
4157
4158 #define ppc_branch_hash_lookup(table, string, create, copy) \
4159 ((struct ppc_branch_hash_entry *) \
4160 bfd_hash_lookup ((table), (string), (create), (copy)))
4161
4162 /* Create an entry in the stub hash table. */
4163
4164 static struct bfd_hash_entry *
4165 stub_hash_newfunc (struct bfd_hash_entry *entry,
4166 struct bfd_hash_table *table,
4167 const char *string)
4168 {
4169 /* Allocate the structure if it has not already been allocated by a
4170 subclass. */
4171 if (entry == NULL)
4172 {
4173 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4174 if (entry == NULL)
4175 return entry;
4176 }
4177
4178 /* Call the allocation method of the superclass. */
4179 entry = bfd_hash_newfunc (entry, table, string);
4180 if (entry != NULL)
4181 {
4182 struct ppc_stub_hash_entry *eh;
4183
4184 /* Initialize the local fields. */
4185 eh = (struct ppc_stub_hash_entry *) entry;
4186 eh->stub_type = ppc_stub_none;
4187 eh->group = NULL;
4188 eh->stub_offset = 0;
4189 eh->target_value = 0;
4190 eh->target_section = NULL;
4191 eh->h = NULL;
4192 eh->plt_ent = NULL;
4193 eh->other = 0;
4194 }
4195
4196 return entry;
4197 }
4198
4199 /* Create an entry in the branch hash table. */
4200
4201 static struct bfd_hash_entry *
4202 branch_hash_newfunc (struct bfd_hash_entry *entry,
4203 struct bfd_hash_table *table,
4204 const char *string)
4205 {
4206 /* Allocate the structure if it has not already been allocated by a
4207 subclass. */
4208 if (entry == NULL)
4209 {
4210 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4211 if (entry == NULL)
4212 return entry;
4213 }
4214
4215 /* Call the allocation method of the superclass. */
4216 entry = bfd_hash_newfunc (entry, table, string);
4217 if (entry != NULL)
4218 {
4219 struct ppc_branch_hash_entry *eh;
4220
4221 /* Initialize the local fields. */
4222 eh = (struct ppc_branch_hash_entry *) entry;
4223 eh->offset = 0;
4224 eh->iter = 0;
4225 }
4226
4227 return entry;
4228 }
4229
4230 /* Create an entry in a ppc64 ELF linker hash table. */
4231
4232 static struct bfd_hash_entry *
4233 link_hash_newfunc (struct bfd_hash_entry *entry,
4234 struct bfd_hash_table *table,
4235 const char *string)
4236 {
4237 /* Allocate the structure if it has not already been allocated by a
4238 subclass. */
4239 if (entry == NULL)
4240 {
4241 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4242 if (entry == NULL)
4243 return entry;
4244 }
4245
4246 /* Call the allocation method of the superclass. */
4247 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4248 if (entry != NULL)
4249 {
4250 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4251
4252 memset (&eh->u.stub_cache, 0,
4253 (sizeof (struct ppc_link_hash_entry)
4254 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4255
4256 /* When making function calls, old ABI code references function entry
4257 points (dot symbols), while new ABI code references the function
4258 descriptor symbol. We need to make any combination of reference and
4259 definition work together, without breaking archive linking.
4260
4261 For a defined function "foo" and an undefined call to "bar":
4262 An old object defines "foo" and ".foo", references ".bar" (possibly
4263 "bar" too).
4264 A new object defines "foo" and references "bar".
4265
4266 A new object thus has no problem with its undefined symbols being
4267 satisfied by definitions in an old object. On the other hand, the
4268 old object won't have ".bar" satisfied by a new object.
4269
4270 Keep a list of newly added dot-symbols. */
4271
4272 if (string[0] == '.')
4273 {
4274 struct ppc_link_hash_table *htab;
4275
4276 htab = (struct ppc_link_hash_table *) table;
4277 eh->u.next_dot_sym = htab->dot_syms;
4278 htab->dot_syms = eh;
4279 }
4280 }
4281
4282 return entry;
4283 }
4284
4285 struct tocsave_entry {
4286 asection *sec;
4287 bfd_vma offset;
4288 };
4289
4290 static hashval_t
4291 tocsave_htab_hash (const void *p)
4292 {
4293 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4294 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4295 }
4296
4297 static int
4298 tocsave_htab_eq (const void *p1, const void *p2)
4299 {
4300 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4301 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4302 return e1->sec == e2->sec && e1->offset == e2->offset;
4303 }
4304
4305 /* Destroy a ppc64 ELF linker hash table. */
4306
4307 static void
4308 ppc64_elf_link_hash_table_free (bfd *obfd)
4309 {
4310 struct ppc_link_hash_table *htab;
4311
4312 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4313 if (htab->tocsave_htab)
4314 htab_delete (htab->tocsave_htab);
4315 bfd_hash_table_free (&htab->branch_hash_table);
4316 bfd_hash_table_free (&htab->stub_hash_table);
4317 _bfd_elf_link_hash_table_free (obfd);
4318 }
4319
4320 /* Create a ppc64 ELF linker hash table. */
4321
4322 static struct bfd_link_hash_table *
4323 ppc64_elf_link_hash_table_create (bfd *abfd)
4324 {
4325 struct ppc_link_hash_table *htab;
4326 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4327
4328 htab = bfd_zmalloc (amt);
4329 if (htab == NULL)
4330 return NULL;
4331
4332 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4333 sizeof (struct ppc_link_hash_entry),
4334 PPC64_ELF_DATA))
4335 {
4336 free (htab);
4337 return NULL;
4338 }
4339
4340 /* Init the stub hash table too. */
4341 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4342 sizeof (struct ppc_stub_hash_entry)))
4343 {
4344 _bfd_elf_link_hash_table_free (abfd);
4345 return NULL;
4346 }
4347
4348 /* And the branch hash table. */
4349 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4350 sizeof (struct ppc_branch_hash_entry)))
4351 {
4352 bfd_hash_table_free (&htab->stub_hash_table);
4353 _bfd_elf_link_hash_table_free (abfd);
4354 return NULL;
4355 }
4356
4357 htab->tocsave_htab = htab_try_create (1024,
4358 tocsave_htab_hash,
4359 tocsave_htab_eq,
4360 NULL);
4361 if (htab->tocsave_htab == NULL)
4362 {
4363 ppc64_elf_link_hash_table_free (abfd);
4364 return NULL;
4365 }
4366 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4367
4368 /* Initializing two fields of the union is just cosmetic. We really
4369 only care about glist, but when compiled on a 32-bit host the
4370 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4371 debugger inspection of these fields look nicer. */
4372 htab->elf.init_got_refcount.refcount = 0;
4373 htab->elf.init_got_refcount.glist = NULL;
4374 htab->elf.init_plt_refcount.refcount = 0;
4375 htab->elf.init_plt_refcount.glist = NULL;
4376 htab->elf.init_got_offset.offset = 0;
4377 htab->elf.init_got_offset.glist = NULL;
4378 htab->elf.init_plt_offset.offset = 0;
4379 htab->elf.init_plt_offset.glist = NULL;
4380
4381 return &htab->elf.root;
4382 }
4383
4384 /* Create sections for linker generated code. */
4385
4386 static bfd_boolean
4387 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4388 {
4389 struct ppc_link_hash_table *htab;
4390 flagword flags;
4391
4392 htab = ppc_hash_table (info);
4393
4394 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4395 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4396 if (htab->params->save_restore_funcs)
4397 {
4398 /* Create .sfpr for code to save and restore fp regs. */
4399 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4400 flags);
4401 if (htab->sfpr == NULL
4402 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4403 return FALSE;
4404 }
4405
4406 if (bfd_link_relocatable (info))
4407 return TRUE;
4408
4409 /* Create .glink for lazy dynamic linking support. */
4410 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4411 flags);
4412 if (htab->glink == NULL
4413 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4414 return FALSE;
4415
4416 if (!info->no_ld_generated_unwind_info)
4417 {
4418 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4419 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4420 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4421 ".eh_frame",
4422 flags);
4423 if (htab->glink_eh_frame == NULL
4424 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4425 return FALSE;
4426 }
4427
4428 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4429 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4430 if (htab->elf.iplt == NULL
4431 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4432 return FALSE;
4433
4434 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4435 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4436 htab->elf.irelplt
4437 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4438 if (htab->elf.irelplt == NULL
4439 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4440 return FALSE;
4441
4442 /* Create branch lookup table for plt_branch stubs. */
4443 flags = (SEC_ALLOC | SEC_LOAD
4444 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4445 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4446 flags);
4447 if (htab->brlt == NULL
4448 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4449 return FALSE;
4450
4451 if (!bfd_link_pic (info))
4452 return TRUE;
4453
4454 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4455 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4456 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4457 ".rela.branch_lt",
4458 flags);
4459 if (htab->relbrlt == NULL
4460 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4461 return FALSE;
4462
4463 return TRUE;
4464 }
4465
4466 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4467
4468 bfd_boolean
4469 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4470 struct ppc64_elf_params *params)
4471 {
4472 struct ppc_link_hash_table *htab;
4473
4474 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4475
4476 /* Always hook our dynamic sections into the first bfd, which is the
4477 linker created stub bfd. This ensures that the GOT header is at
4478 the start of the output TOC section. */
4479 htab = ppc_hash_table (info);
4480 htab->elf.dynobj = params->stub_bfd;
4481 htab->params = params;
4482
4483 return create_linkage_sections (htab->elf.dynobj, info);
4484 }
4485
4486 /* Build a name for an entry in the stub hash table. */
4487
4488 static char *
4489 ppc_stub_name (const asection *input_section,
4490 const asection *sym_sec,
4491 const struct ppc_link_hash_entry *h,
4492 const Elf_Internal_Rela *rel)
4493 {
4494 char *stub_name;
4495 ssize_t len;
4496
4497 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4498 offsets from a sym as a branch target? In fact, we could
4499 probably assume the addend is always zero. */
4500 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4501
4502 if (h)
4503 {
4504 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4505 stub_name = bfd_malloc (len);
4506 if (stub_name == NULL)
4507 return stub_name;
4508
4509 len = sprintf (stub_name, "%08x.%s+%x",
4510 input_section->id & 0xffffffff,
4511 h->elf.root.root.string,
4512 (int) rel->r_addend & 0xffffffff);
4513 }
4514 else
4515 {
4516 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4517 stub_name = bfd_malloc (len);
4518 if (stub_name == NULL)
4519 return stub_name;
4520
4521 len = sprintf (stub_name, "%08x.%x:%x+%x",
4522 input_section->id & 0xffffffff,
4523 sym_sec->id & 0xffffffff,
4524 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4525 (int) rel->r_addend & 0xffffffff);
4526 }
4527 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4528 stub_name[len - 2] = 0;
4529 return stub_name;
4530 }
4531
4532 /* Look up an entry in the stub hash. Stub entries are cached because
4533 creating the stub name takes a bit of time. */
4534
4535 static struct ppc_stub_hash_entry *
4536 ppc_get_stub_entry (const asection *input_section,
4537 const asection *sym_sec,
4538 struct ppc_link_hash_entry *h,
4539 const Elf_Internal_Rela *rel,
4540 struct ppc_link_hash_table *htab)
4541 {
4542 struct ppc_stub_hash_entry *stub_entry;
4543 struct map_stub *group;
4544
4545 /* If this input section is part of a group of sections sharing one
4546 stub section, then use the id of the first section in the group.
4547 Stub names need to include a section id, as there may well be
4548 more than one stub used to reach say, printf, and we need to
4549 distinguish between them. */
4550 group = htab->sec_info[input_section->id].u.group;
4551 if (group == NULL)
4552 return NULL;
4553
4554 if (h != NULL && h->u.stub_cache != NULL
4555 && h->u.stub_cache->h == h
4556 && h->u.stub_cache->group == group)
4557 {
4558 stub_entry = h->u.stub_cache;
4559 }
4560 else
4561 {
4562 char *stub_name;
4563
4564 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4565 if (stub_name == NULL)
4566 return NULL;
4567
4568 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4569 stub_name, FALSE, FALSE);
4570 if (h != NULL)
4571 h->u.stub_cache = stub_entry;
4572
4573 free (stub_name);
4574 }
4575
4576 return stub_entry;
4577 }
4578
4579 /* Add a new stub entry to the stub hash. Not all fields of the new
4580 stub entry are initialised. */
4581
4582 static struct ppc_stub_hash_entry *
4583 ppc_add_stub (const char *stub_name,
4584 asection *section,
4585 struct bfd_link_info *info)
4586 {
4587 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4588 struct map_stub *group;
4589 asection *link_sec;
4590 asection *stub_sec;
4591 struct ppc_stub_hash_entry *stub_entry;
4592
4593 group = htab->sec_info[section->id].u.group;
4594 link_sec = group->link_sec;
4595 stub_sec = group->stub_sec;
4596 if (stub_sec == NULL)
4597 {
4598 size_t namelen;
4599 bfd_size_type len;
4600 char *s_name;
4601
4602 namelen = strlen (link_sec->name);
4603 len = namelen + sizeof (STUB_SUFFIX);
4604 s_name = bfd_alloc (htab->params->stub_bfd, len);
4605 if (s_name == NULL)
4606 return NULL;
4607
4608 memcpy (s_name, link_sec->name, namelen);
4609 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4610 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4611 if (stub_sec == NULL)
4612 return NULL;
4613 group->stub_sec = stub_sec;
4614 }
4615
4616 /* Enter this entry into the linker stub hash table. */
4617 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4618 TRUE, FALSE);
4619 if (stub_entry == NULL)
4620 {
4621 /* xgettext:c-format */
4622 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4623 section->owner, stub_name);
4624 return NULL;
4625 }
4626
4627 stub_entry->group = group;
4628 stub_entry->stub_offset = 0;
4629 return stub_entry;
4630 }
4631
4632 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4633 not already done. */
4634
4635 static bfd_boolean
4636 create_got_section (bfd *abfd, struct bfd_link_info *info)
4637 {
4638 asection *got, *relgot;
4639 flagword flags;
4640 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4641
4642 if (!is_ppc64_elf (abfd))
4643 return FALSE;
4644 if (htab == NULL)
4645 return FALSE;
4646
4647 if (!htab->elf.sgot
4648 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4649 return FALSE;
4650
4651 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4652 | SEC_LINKER_CREATED);
4653
4654 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4655 if (!got
4656 || !bfd_set_section_alignment (abfd, got, 3))
4657 return FALSE;
4658
4659 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4660 flags | SEC_READONLY);
4661 if (!relgot
4662 || ! bfd_set_section_alignment (abfd, relgot, 3))
4663 return FALSE;
4664
4665 ppc64_elf_tdata (abfd)->got = got;
4666 ppc64_elf_tdata (abfd)->relgot = relgot;
4667 return TRUE;
4668 }
4669
4670 /* Follow indirect and warning symbol links. */
4671
4672 static inline struct bfd_link_hash_entry *
4673 follow_link (struct bfd_link_hash_entry *h)
4674 {
4675 while (h->type == bfd_link_hash_indirect
4676 || h->type == bfd_link_hash_warning)
4677 h = h->u.i.link;
4678 return h;
4679 }
4680
4681 static inline struct elf_link_hash_entry *
4682 elf_follow_link (struct elf_link_hash_entry *h)
4683 {
4684 return (struct elf_link_hash_entry *) follow_link (&h->root);
4685 }
4686
4687 static inline struct ppc_link_hash_entry *
4688 ppc_follow_link (struct ppc_link_hash_entry *h)
4689 {
4690 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4691 }
4692
4693 /* Merge PLT info on FROM with that on TO. */
4694
4695 static void
4696 move_plt_plist (struct ppc_link_hash_entry *from,
4697 struct ppc_link_hash_entry *to)
4698 {
4699 if (from->elf.plt.plist != NULL)
4700 {
4701 if (to->elf.plt.plist != NULL)
4702 {
4703 struct plt_entry **entp;
4704 struct plt_entry *ent;
4705
4706 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4707 {
4708 struct plt_entry *dent;
4709
4710 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4711 if (dent->addend == ent->addend)
4712 {
4713 dent->plt.refcount += ent->plt.refcount;
4714 *entp = ent->next;
4715 break;
4716 }
4717 if (dent == NULL)
4718 entp = &ent->next;
4719 }
4720 *entp = to->elf.plt.plist;
4721 }
4722
4723 to->elf.plt.plist = from->elf.plt.plist;
4724 from->elf.plt.plist = NULL;
4725 }
4726 }
4727
4728 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4729
4730 static void
4731 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4732 struct elf_link_hash_entry *dir,
4733 struct elf_link_hash_entry *ind)
4734 {
4735 struct ppc_link_hash_entry *edir, *eind;
4736
4737 edir = (struct ppc_link_hash_entry *) dir;
4738 eind = (struct ppc_link_hash_entry *) ind;
4739
4740 edir->is_func |= eind->is_func;
4741 edir->is_func_descriptor |= eind->is_func_descriptor;
4742 edir->tls_mask |= eind->tls_mask;
4743 if (eind->oh != NULL)
4744 edir->oh = ppc_follow_link (eind->oh);
4745
4746 /* If called to transfer flags for a weakdef during processing
4747 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4748 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4749 if (!(ELIMINATE_COPY_RELOCS
4750 && eind->elf.root.type != bfd_link_hash_indirect
4751 && edir->elf.dynamic_adjusted))
4752 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4753
4754 if (edir->elf.versioned != versioned_hidden)
4755 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4756 edir->elf.ref_regular |= eind->elf.ref_regular;
4757 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4758 edir->elf.needs_plt |= eind->elf.needs_plt;
4759 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4760
4761 /* If we were called to copy over info for a weak sym, don't copy
4762 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4763 in order to simplify readonly_dynrelocs and save a field in the
4764 symbol hash entry, but that means dyn_relocs can't be used in any
4765 tests about a specific symbol, or affect other symbol flags which
4766 are then tested.
4767 Chain weakdefs so we can get from the weakdef back to an alias.
4768 The list is circular so that we don't need to use u.weakdef as
4769 well as this list to look at all aliases. */
4770 if (eind->elf.root.type != bfd_link_hash_indirect)
4771 {
4772 struct ppc_link_hash_entry *cur, *add, *next;
4773
4774 add = eind;
4775 do
4776 {
4777 cur = edir->weakref;
4778 if (cur != NULL)
4779 {
4780 do
4781 {
4782 /* We can be called twice for the same symbols.
4783 Don't make multiple loops. */
4784 if (cur == add)
4785 return;
4786 cur = cur->weakref;
4787 } while (cur != edir);
4788 }
4789 next = add->weakref;
4790 if (cur != add)
4791 {
4792 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4793 edir->weakref = add;
4794 }
4795 add = next;
4796 } while (add != NULL && add != eind);
4797 return;
4798 }
4799
4800 /* Copy over any dynamic relocs we may have on the indirect sym. */
4801 if (eind->dyn_relocs != NULL)
4802 {
4803 if (edir->dyn_relocs != NULL)
4804 {
4805 struct elf_dyn_relocs **pp;
4806 struct elf_dyn_relocs *p;
4807
4808 /* Add reloc counts against the indirect sym to the direct sym
4809 list. Merge any entries against the same section. */
4810 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4811 {
4812 struct elf_dyn_relocs *q;
4813
4814 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4815 if (q->sec == p->sec)
4816 {
4817 q->pc_count += p->pc_count;
4818 q->count += p->count;
4819 *pp = p->next;
4820 break;
4821 }
4822 if (q == NULL)
4823 pp = &p->next;
4824 }
4825 *pp = edir->dyn_relocs;
4826 }
4827
4828 edir->dyn_relocs = eind->dyn_relocs;
4829 eind->dyn_relocs = NULL;
4830 }
4831
4832 /* Copy over got entries that we may have already seen to the
4833 symbol which just became indirect. */
4834 if (eind->elf.got.glist != NULL)
4835 {
4836 if (edir->elf.got.glist != NULL)
4837 {
4838 struct got_entry **entp;
4839 struct got_entry *ent;
4840
4841 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4842 {
4843 struct got_entry *dent;
4844
4845 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4846 if (dent->addend == ent->addend
4847 && dent->owner == ent->owner
4848 && dent->tls_type == ent->tls_type)
4849 {
4850 dent->got.refcount += ent->got.refcount;
4851 *entp = ent->next;
4852 break;
4853 }
4854 if (dent == NULL)
4855 entp = &ent->next;
4856 }
4857 *entp = edir->elf.got.glist;
4858 }
4859
4860 edir->elf.got.glist = eind->elf.got.glist;
4861 eind->elf.got.glist = NULL;
4862 }
4863
4864 /* And plt entries. */
4865 move_plt_plist (eind, edir);
4866
4867 if (eind->elf.dynindx != -1)
4868 {
4869 if (edir->elf.dynindx != -1)
4870 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4871 edir->elf.dynstr_index);
4872 edir->elf.dynindx = eind->elf.dynindx;
4873 edir->elf.dynstr_index = eind->elf.dynstr_index;
4874 eind->elf.dynindx = -1;
4875 eind->elf.dynstr_index = 0;
4876 }
4877 }
4878
4879 /* Find the function descriptor hash entry from the given function code
4880 hash entry FH. Link the entries via their OH fields. */
4881
4882 static struct ppc_link_hash_entry *
4883 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4884 {
4885 struct ppc_link_hash_entry *fdh = fh->oh;
4886
4887 if (fdh == NULL)
4888 {
4889 const char *fd_name = fh->elf.root.root.string + 1;
4890
4891 fdh = (struct ppc_link_hash_entry *)
4892 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4893 if (fdh == NULL)
4894 return fdh;
4895
4896 fdh->is_func_descriptor = 1;
4897 fdh->oh = fh;
4898 fh->is_func = 1;
4899 fh->oh = fdh;
4900 }
4901
4902 fdh = ppc_follow_link (fdh);
4903 fdh->is_func_descriptor = 1;
4904 fdh->oh = fh;
4905 return fdh;
4906 }
4907
4908 /* Make a fake function descriptor sym for the undefined code sym FH. */
4909
4910 static struct ppc_link_hash_entry *
4911 make_fdh (struct bfd_link_info *info,
4912 struct ppc_link_hash_entry *fh)
4913 {
4914 bfd *abfd = fh->elf.root.u.undef.abfd;
4915 struct bfd_link_hash_entry *bh = NULL;
4916 struct ppc_link_hash_entry *fdh;
4917 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4918 ? BSF_WEAK
4919 : BSF_GLOBAL);
4920
4921 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4922 fh->elf.root.root.string + 1,
4923 flags, bfd_und_section_ptr, 0,
4924 NULL, FALSE, FALSE, &bh))
4925 return NULL;
4926
4927 fdh = (struct ppc_link_hash_entry *) bh;
4928 fdh->elf.non_elf = 0;
4929 fdh->fake = 1;
4930 fdh->is_func_descriptor = 1;
4931 fdh->oh = fh;
4932 fh->is_func = 1;
4933 fh->oh = fdh;
4934 return fdh;
4935 }
4936
4937 /* Fix function descriptor symbols defined in .opd sections to be
4938 function type. */
4939
4940 static bfd_boolean
4941 ppc64_elf_add_symbol_hook (bfd *ibfd,
4942 struct bfd_link_info *info,
4943 Elf_Internal_Sym *isym,
4944 const char **name,
4945 flagword *flags ATTRIBUTE_UNUSED,
4946 asection **sec,
4947 bfd_vma *value)
4948 {
4949 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4950 && (ibfd->flags & DYNAMIC) == 0
4951 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4952 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4953
4954 if (*sec != NULL
4955 && strcmp ((*sec)->name, ".opd") == 0)
4956 {
4957 asection *code_sec;
4958
4959 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4960 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4961 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4962
4963 /* If the symbol is a function defined in .opd, and the function
4964 code is in a discarded group, let it appear to be undefined. */
4965 if (!bfd_link_relocatable (info)
4966 && (*sec)->reloc_count != 0
4967 && opd_entry_value (*sec, *value, &code_sec, NULL,
4968 FALSE) != (bfd_vma) -1
4969 && discarded_section (code_sec))
4970 {
4971 *sec = bfd_und_section_ptr;
4972 isym->st_shndx = SHN_UNDEF;
4973 }
4974 }
4975 else if (*sec != NULL
4976 && strcmp ((*sec)->name, ".toc") == 0
4977 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4978 {
4979 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4980 if (htab != NULL)
4981 htab->params->object_in_toc = 1;
4982 }
4983
4984 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4985 {
4986 if (abiversion (ibfd) == 0)
4987 set_abiversion (ibfd, 2);
4988 else if (abiversion (ibfd) == 1)
4989 {
4990 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4991 " for ABI version 1\n"), name);
4992 bfd_set_error (bfd_error_bad_value);
4993 return FALSE;
4994 }
4995 }
4996
4997 return TRUE;
4998 }
4999
5000 /* Merge non-visibility st_other attributes: local entry point. */
5001
5002 static void
5003 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5004 const Elf_Internal_Sym *isym,
5005 bfd_boolean definition,
5006 bfd_boolean dynamic)
5007 {
5008 if (definition && !dynamic)
5009 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5010 | ELF_ST_VISIBILITY (h->other));
5011 }
5012
5013 /* Hook called on merging a symbol. We use this to clear "fake" since
5014 we now have a real symbol. */
5015
5016 static bfd_boolean
5017 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5018 const Elf_Internal_Sym *isym ATTRIBUTE_UNUSED,
5019 asection **psec ATTRIBUTE_UNUSED,
5020 bfd_boolean newdef ATTRIBUTE_UNUSED,
5021 bfd_boolean olddef ATTRIBUTE_UNUSED,
5022 bfd *oldbfd ATTRIBUTE_UNUSED,
5023 const asection *oldsec ATTRIBUTE_UNUSED)
5024 {
5025 ((struct ppc_link_hash_entry *) h)->fake = 0;
5026 return TRUE;
5027 }
5028
5029 /* This function makes an old ABI object reference to ".bar" cause the
5030 inclusion of a new ABI object archive that defines "bar".
5031 NAME is a symbol defined in an archive. Return a symbol in the hash
5032 table that might be satisfied by the archive symbols. */
5033
5034 static struct elf_link_hash_entry *
5035 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5036 struct bfd_link_info *info,
5037 const char *name)
5038 {
5039 struct elf_link_hash_entry *h;
5040 char *dot_name;
5041 size_t len;
5042
5043 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5044 if (h != NULL
5045 /* Don't return this sym if it is a fake function descriptor
5046 created by add_symbol_adjust. */
5047 && !((struct ppc_link_hash_entry *) h)->fake)
5048 return h;
5049
5050 if (name[0] == '.')
5051 return h;
5052
5053 len = strlen (name);
5054 dot_name = bfd_alloc (abfd, len + 2);
5055 if (dot_name == NULL)
5056 return (struct elf_link_hash_entry *) 0 - 1;
5057 dot_name[0] = '.';
5058 memcpy (dot_name + 1, name, len + 1);
5059 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5060 bfd_release (abfd, dot_name);
5061 return h;
5062 }
5063
5064 /* This function satisfies all old ABI object references to ".bar" if a
5065 new ABI object defines "bar". Well, at least, undefined dot symbols
5066 are made weak. This stops later archive searches from including an
5067 object if we already have a function descriptor definition. It also
5068 prevents the linker complaining about undefined symbols.
5069 We also check and correct mismatched symbol visibility here. The
5070 most restrictive visibility of the function descriptor and the
5071 function entry symbol is used. */
5072
5073 static bfd_boolean
5074 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5075 {
5076 struct ppc_link_hash_table *htab;
5077 struct ppc_link_hash_entry *fdh;
5078
5079 if (eh->elf.root.type == bfd_link_hash_warning)
5080 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5081
5082 if (eh->elf.root.type == bfd_link_hash_indirect)
5083 return TRUE;
5084
5085 if (eh->elf.root.root.string[0] != '.')
5086 abort ();
5087
5088 htab = ppc_hash_table (info);
5089 if (htab == NULL)
5090 return FALSE;
5091
5092 fdh = lookup_fdh (eh, htab);
5093 if (fdh == NULL
5094 && !bfd_link_relocatable (info)
5095 && (eh->elf.root.type == bfd_link_hash_undefined
5096 || eh->elf.root.type == bfd_link_hash_undefweak)
5097 && eh->elf.ref_regular)
5098 {
5099 /* Make an undefined function descriptor sym, in order to
5100 pull in an --as-needed shared lib. Archives are handled
5101 elsewhere. */
5102 fdh = make_fdh (info, eh);
5103 if (fdh == NULL)
5104 return FALSE;
5105 }
5106
5107 if (fdh != NULL)
5108 {
5109 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5110 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5111
5112 /* Make both descriptor and entry symbol have the most
5113 constraining visibility of either symbol. */
5114 if (entry_vis < descr_vis)
5115 fdh->elf.other += entry_vis - descr_vis;
5116 else if (entry_vis > descr_vis)
5117 eh->elf.other += descr_vis - entry_vis;
5118
5119 /* Propagate reference flags from entry symbol to function
5120 descriptor symbol. */
5121 fdh->elf.root.non_ir_ref |= eh->elf.root.non_ir_ref;
5122 fdh->elf.ref_regular |= eh->elf.ref_regular;
5123 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5124
5125 if (!fdh->elf.forced_local
5126 && fdh->elf.dynindx == -1
5127 && fdh->elf.versioned != versioned_hidden
5128 && (bfd_link_dll (info)
5129 || fdh->elf.def_dynamic
5130 || fdh->elf.ref_dynamic)
5131 && (eh->elf.ref_regular
5132 || eh->elf.def_regular))
5133 {
5134 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5135 return FALSE;
5136 }
5137 }
5138
5139 return TRUE;
5140 }
5141
5142 /* Set up opd section info and abiversion for IBFD, and process list
5143 of dot-symbols we made in link_hash_newfunc. */
5144
5145 static bfd_boolean
5146 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5147 {
5148 struct ppc_link_hash_table *htab;
5149 struct ppc_link_hash_entry **p, *eh;
5150 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5151
5152 if (opd != NULL && opd->size != 0)
5153 {
5154 if (abiversion (ibfd) == 0)
5155 set_abiversion (ibfd, 1);
5156 else if (abiversion (ibfd) >= 2)
5157 {
5158 /* xgettext:c-format */
5159 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5160 " version %d\n"),
5161 ibfd, abiversion (ibfd));
5162 bfd_set_error (bfd_error_bad_value);
5163 return FALSE;
5164 }
5165
5166 if ((ibfd->flags & DYNAMIC) == 0
5167 && (opd->flags & SEC_RELOC) != 0
5168 && opd->reloc_count != 0
5169 && !bfd_is_abs_section (opd->output_section))
5170 {
5171 /* Garbage collection needs some extra help with .opd sections.
5172 We don't want to necessarily keep everything referenced by
5173 relocs in .opd, as that would keep all functions. Instead,
5174 if we reference an .opd symbol (a function descriptor), we
5175 want to keep the function code symbol's section. This is
5176 easy for global symbols, but for local syms we need to keep
5177 information about the associated function section. */
5178 bfd_size_type amt;
5179 asection **opd_sym_map;
5180
5181 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5182 opd_sym_map = bfd_zalloc (ibfd, amt);
5183 if (opd_sym_map == NULL)
5184 return FALSE;
5185 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5186 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5187 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5188 }
5189 }
5190
5191 if (!is_ppc64_elf (info->output_bfd))
5192 return TRUE;
5193 htab = ppc_hash_table (info);
5194 if (htab == NULL)
5195 return FALSE;
5196
5197 /* For input files without an explicit abiversion in e_flags
5198 we should have flagged any with symbol st_other bits set
5199 as ELFv1 and above flagged those with .opd as ELFv2.
5200 Set the output abiversion if not yet set, and for any input
5201 still ambiguous, take its abiversion from the output.
5202 Differences in ABI are reported later. */
5203 if (abiversion (info->output_bfd) == 0)
5204 set_abiversion (info->output_bfd, abiversion (ibfd));
5205 else if (abiversion (ibfd) == 0)
5206 set_abiversion (ibfd, abiversion (info->output_bfd));
5207
5208 p = &htab->dot_syms;
5209 while ((eh = *p) != NULL)
5210 {
5211 *p = NULL;
5212 if (&eh->elf == htab->elf.hgot)
5213 ;
5214 else if (htab->elf.hgot == NULL
5215 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5216 htab->elf.hgot = &eh->elf;
5217 else if (abiversion (ibfd) <= 1)
5218 {
5219 htab->need_func_desc_adj = 1;
5220 if (!add_symbol_adjust (eh, info))
5221 return FALSE;
5222 }
5223 p = &eh->u.next_dot_sym;
5224 }
5225 return TRUE;
5226 }
5227
5228 /* Undo hash table changes when an --as-needed input file is determined
5229 not to be needed. */
5230
5231 static bfd_boolean
5232 ppc64_elf_notice_as_needed (bfd *ibfd,
5233 struct bfd_link_info *info,
5234 enum notice_asneeded_action act)
5235 {
5236 if (act == notice_not_needed)
5237 {
5238 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5239
5240 if (htab == NULL)
5241 return FALSE;
5242
5243 htab->dot_syms = NULL;
5244 }
5245 return _bfd_elf_notice_as_needed (ibfd, info, act);
5246 }
5247
5248 /* If --just-symbols against a final linked binary, then assume we need
5249 toc adjusting stubs when calling functions defined there. */
5250
5251 static void
5252 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5253 {
5254 if ((sec->flags & SEC_CODE) != 0
5255 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5256 && is_ppc64_elf (sec->owner))
5257 {
5258 if (abiversion (sec->owner) >= 2
5259 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5260 sec->has_toc_reloc = 1;
5261 }
5262 _bfd_elf_link_just_syms (sec, info);
5263 }
5264
5265 static struct plt_entry **
5266 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5267 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5268 {
5269 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5270 struct plt_entry **local_plt;
5271 unsigned char *local_got_tls_masks;
5272
5273 if (local_got_ents == NULL)
5274 {
5275 bfd_size_type size = symtab_hdr->sh_info;
5276
5277 size *= (sizeof (*local_got_ents)
5278 + sizeof (*local_plt)
5279 + sizeof (*local_got_tls_masks));
5280 local_got_ents = bfd_zalloc (abfd, size);
5281 if (local_got_ents == NULL)
5282 return NULL;
5283 elf_local_got_ents (abfd) = local_got_ents;
5284 }
5285
5286 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5287 {
5288 struct got_entry *ent;
5289
5290 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5291 if (ent->addend == r_addend
5292 && ent->owner == abfd
5293 && ent->tls_type == tls_type)
5294 break;
5295 if (ent == NULL)
5296 {
5297 bfd_size_type amt = sizeof (*ent);
5298 ent = bfd_alloc (abfd, amt);
5299 if (ent == NULL)
5300 return FALSE;
5301 ent->next = local_got_ents[r_symndx];
5302 ent->addend = r_addend;
5303 ent->owner = abfd;
5304 ent->tls_type = tls_type;
5305 ent->is_indirect = FALSE;
5306 ent->got.refcount = 0;
5307 local_got_ents[r_symndx] = ent;
5308 }
5309 ent->got.refcount += 1;
5310 }
5311
5312 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5313 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5314 local_got_tls_masks[r_symndx] |= tls_type;
5315
5316 return local_plt + r_symndx;
5317 }
5318
5319 static bfd_boolean
5320 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5321 {
5322 struct plt_entry *ent;
5323
5324 for (ent = *plist; ent != NULL; ent = ent->next)
5325 if (ent->addend == addend)
5326 break;
5327 if (ent == NULL)
5328 {
5329 bfd_size_type amt = sizeof (*ent);
5330 ent = bfd_alloc (abfd, amt);
5331 if (ent == NULL)
5332 return FALSE;
5333 ent->next = *plist;
5334 ent->addend = addend;
5335 ent->plt.refcount = 0;
5336 *plist = ent;
5337 }
5338 ent->plt.refcount += 1;
5339 return TRUE;
5340 }
5341
5342 static bfd_boolean
5343 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5344 {
5345 return (r_type == R_PPC64_REL24
5346 || r_type == R_PPC64_REL14
5347 || r_type == R_PPC64_REL14_BRTAKEN
5348 || r_type == R_PPC64_REL14_BRNTAKEN
5349 || r_type == R_PPC64_ADDR24
5350 || r_type == R_PPC64_ADDR14
5351 || r_type == R_PPC64_ADDR14_BRTAKEN
5352 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5353 }
5354
5355 /* Look through the relocs for a section during the first phase, and
5356 calculate needed space in the global offset table, procedure
5357 linkage table, and dynamic reloc sections. */
5358
5359 static bfd_boolean
5360 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5361 asection *sec, const Elf_Internal_Rela *relocs)
5362 {
5363 struct ppc_link_hash_table *htab;
5364 Elf_Internal_Shdr *symtab_hdr;
5365 struct elf_link_hash_entry **sym_hashes;
5366 const Elf_Internal_Rela *rel;
5367 const Elf_Internal_Rela *rel_end;
5368 asection *sreloc;
5369 asection **opd_sym_map;
5370 struct elf_link_hash_entry *tga, *dottga;
5371
5372 if (bfd_link_relocatable (info))
5373 return TRUE;
5374
5375 /* Don't do anything special with non-loaded, non-alloced sections.
5376 In particular, any relocs in such sections should not affect GOT
5377 and PLT reference counting (ie. we don't allow them to create GOT
5378 or PLT entries), there's no possibility or desire to optimize TLS
5379 relocs, and there's not much point in propagating relocs to shared
5380 libs that the dynamic linker won't relocate. */
5381 if ((sec->flags & SEC_ALLOC) == 0)
5382 return TRUE;
5383
5384 BFD_ASSERT (is_ppc64_elf (abfd));
5385
5386 htab = ppc_hash_table (info);
5387 if (htab == NULL)
5388 return FALSE;
5389
5390 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5391 FALSE, FALSE, TRUE);
5392 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5393 FALSE, FALSE, TRUE);
5394 symtab_hdr = &elf_symtab_hdr (abfd);
5395 sym_hashes = elf_sym_hashes (abfd);
5396 sreloc = NULL;
5397 opd_sym_map = NULL;
5398 if (ppc64_elf_section_data (sec) != NULL
5399 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5400 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5401
5402 rel_end = relocs + sec->reloc_count;
5403 for (rel = relocs; rel < rel_end; rel++)
5404 {
5405 unsigned long r_symndx;
5406 struct elf_link_hash_entry *h;
5407 enum elf_ppc64_reloc_type r_type;
5408 int tls_type;
5409 struct _ppc64_elf_section_data *ppc64_sec;
5410 struct plt_entry **ifunc, **plt_list;
5411
5412 r_symndx = ELF64_R_SYM (rel->r_info);
5413 if (r_symndx < symtab_hdr->sh_info)
5414 h = NULL;
5415 else
5416 {
5417 struct ppc_link_hash_entry *eh;
5418
5419 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5420 h = elf_follow_link (h);
5421 eh = (struct ppc_link_hash_entry *) h;
5422
5423 /* PR15323, ref flags aren't set for references in the same
5424 object. */
5425 h->root.non_ir_ref = 1;
5426 if (eh->is_func && eh->oh != NULL)
5427 eh->oh->elf.root.non_ir_ref = 1;
5428
5429 if (h == htab->elf.hgot)
5430 sec->has_toc_reloc = 1;
5431 }
5432
5433 tls_type = 0;
5434 ifunc = NULL;
5435 if (h != NULL)
5436 {
5437 if (h->type == STT_GNU_IFUNC)
5438 {
5439 h->needs_plt = 1;
5440 ifunc = &h->plt.plist;
5441 }
5442 }
5443 else
5444 {
5445 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5446 abfd, r_symndx);
5447 if (isym == NULL)
5448 return FALSE;
5449
5450 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5451 {
5452 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5453 rel->r_addend, PLT_IFUNC);
5454 if (ifunc == NULL)
5455 return FALSE;
5456 }
5457 }
5458
5459 r_type = ELF64_R_TYPE (rel->r_info);
5460 switch (r_type)
5461 {
5462 case R_PPC64_TLSGD:
5463 case R_PPC64_TLSLD:
5464 /* These special tls relocs tie a call to __tls_get_addr with
5465 its parameter symbol. */
5466 break;
5467
5468 case R_PPC64_GOT_TLSLD16:
5469 case R_PPC64_GOT_TLSLD16_LO:
5470 case R_PPC64_GOT_TLSLD16_HI:
5471 case R_PPC64_GOT_TLSLD16_HA:
5472 tls_type = TLS_TLS | TLS_LD;
5473 goto dogottls;
5474
5475 case R_PPC64_GOT_TLSGD16:
5476 case R_PPC64_GOT_TLSGD16_LO:
5477 case R_PPC64_GOT_TLSGD16_HI:
5478 case R_PPC64_GOT_TLSGD16_HA:
5479 tls_type = TLS_TLS | TLS_GD;
5480 goto dogottls;
5481
5482 case R_PPC64_GOT_TPREL16_DS:
5483 case R_PPC64_GOT_TPREL16_LO_DS:
5484 case R_PPC64_GOT_TPREL16_HI:
5485 case R_PPC64_GOT_TPREL16_HA:
5486 if (bfd_link_pic (info))
5487 info->flags |= DF_STATIC_TLS;
5488 tls_type = TLS_TLS | TLS_TPREL;
5489 goto dogottls;
5490
5491 case R_PPC64_GOT_DTPREL16_DS:
5492 case R_PPC64_GOT_DTPREL16_LO_DS:
5493 case R_PPC64_GOT_DTPREL16_HI:
5494 case R_PPC64_GOT_DTPREL16_HA:
5495 tls_type = TLS_TLS | TLS_DTPREL;
5496 dogottls:
5497 sec->has_tls_reloc = 1;
5498 /* Fall through */
5499
5500 case R_PPC64_GOT16:
5501 case R_PPC64_GOT16_DS:
5502 case R_PPC64_GOT16_HA:
5503 case R_PPC64_GOT16_HI:
5504 case R_PPC64_GOT16_LO:
5505 case R_PPC64_GOT16_LO_DS:
5506 /* This symbol requires a global offset table entry. */
5507 sec->has_toc_reloc = 1;
5508 if (r_type == R_PPC64_GOT_TLSLD16
5509 || r_type == R_PPC64_GOT_TLSGD16
5510 || r_type == R_PPC64_GOT_TPREL16_DS
5511 || r_type == R_PPC64_GOT_DTPREL16_DS
5512 || r_type == R_PPC64_GOT16
5513 || r_type == R_PPC64_GOT16_DS)
5514 {
5515 htab->do_multi_toc = 1;
5516 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5517 }
5518
5519 if (ppc64_elf_tdata (abfd)->got == NULL
5520 && !create_got_section (abfd, info))
5521 return FALSE;
5522
5523 if (h != NULL)
5524 {
5525 struct ppc_link_hash_entry *eh;
5526 struct got_entry *ent;
5527
5528 eh = (struct ppc_link_hash_entry *) h;
5529 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5530 if (ent->addend == rel->r_addend
5531 && ent->owner == abfd
5532 && ent->tls_type == tls_type)
5533 break;
5534 if (ent == NULL)
5535 {
5536 bfd_size_type amt = sizeof (*ent);
5537 ent = bfd_alloc (abfd, amt);
5538 if (ent == NULL)
5539 return FALSE;
5540 ent->next = eh->elf.got.glist;
5541 ent->addend = rel->r_addend;
5542 ent->owner = abfd;
5543 ent->tls_type = tls_type;
5544 ent->is_indirect = FALSE;
5545 ent->got.refcount = 0;
5546 eh->elf.got.glist = ent;
5547 }
5548 ent->got.refcount += 1;
5549 eh->tls_mask |= tls_type;
5550 }
5551 else
5552 /* This is a global offset table entry for a local symbol. */
5553 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5554 rel->r_addend, tls_type))
5555 return FALSE;
5556
5557 /* We may also need a plt entry if the symbol turns out to be
5558 an ifunc. */
5559 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5560 {
5561 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5562 return FALSE;
5563 }
5564 break;
5565
5566 case R_PPC64_PLT16_HA:
5567 case R_PPC64_PLT16_HI:
5568 case R_PPC64_PLT16_LO:
5569 case R_PPC64_PLT32:
5570 case R_PPC64_PLT64:
5571 /* This symbol requires a procedure linkage table entry. */
5572 plt_list = ifunc;
5573 if (h != NULL)
5574 {
5575 h->needs_plt = 1;
5576 if (h->root.root.string[0] == '.'
5577 && h->root.root.string[1] != '\0')
5578 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5579 plt_list = &h->plt.plist;
5580 }
5581 if (plt_list == NULL)
5582 {
5583 /* It does not make sense to have a procedure linkage
5584 table entry for a non-ifunc local symbol. */
5585 info->callbacks->einfo
5586 /* xgettext:c-format */
5587 (_("%H: %s reloc against local symbol\n"),
5588 abfd, sec, rel->r_offset,
5589 ppc64_elf_howto_table[r_type]->name);
5590 bfd_set_error (bfd_error_bad_value);
5591 return FALSE;
5592 }
5593 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5594 return FALSE;
5595 break;
5596
5597 /* The following relocations don't need to propagate the
5598 relocation if linking a shared object since they are
5599 section relative. */
5600 case R_PPC64_SECTOFF:
5601 case R_PPC64_SECTOFF_LO:
5602 case R_PPC64_SECTOFF_HI:
5603 case R_PPC64_SECTOFF_HA:
5604 case R_PPC64_SECTOFF_DS:
5605 case R_PPC64_SECTOFF_LO_DS:
5606 case R_PPC64_DTPREL16:
5607 case R_PPC64_DTPREL16_LO:
5608 case R_PPC64_DTPREL16_HI:
5609 case R_PPC64_DTPREL16_HA:
5610 case R_PPC64_DTPREL16_DS:
5611 case R_PPC64_DTPREL16_LO_DS:
5612 case R_PPC64_DTPREL16_HIGH:
5613 case R_PPC64_DTPREL16_HIGHA:
5614 case R_PPC64_DTPREL16_HIGHER:
5615 case R_PPC64_DTPREL16_HIGHERA:
5616 case R_PPC64_DTPREL16_HIGHEST:
5617 case R_PPC64_DTPREL16_HIGHESTA:
5618 break;
5619
5620 /* Nor do these. */
5621 case R_PPC64_REL16:
5622 case R_PPC64_REL16_LO:
5623 case R_PPC64_REL16_HI:
5624 case R_PPC64_REL16_HA:
5625 case R_PPC64_REL16DX_HA:
5626 break;
5627
5628 /* Not supported as a dynamic relocation. */
5629 case R_PPC64_ADDR64_LOCAL:
5630 if (bfd_link_pic (info))
5631 {
5632 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5633 ppc_howto_init ();
5634 /* xgettext:c-format */
5635 info->callbacks->einfo (_("%H: %s reloc unsupported "
5636 "in shared libraries and PIEs.\n"),
5637 abfd, sec, rel->r_offset,
5638 ppc64_elf_howto_table[r_type]->name);
5639 bfd_set_error (bfd_error_bad_value);
5640 return FALSE;
5641 }
5642 break;
5643
5644 case R_PPC64_TOC16:
5645 case R_PPC64_TOC16_DS:
5646 htab->do_multi_toc = 1;
5647 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5648 /* Fall through. */
5649 case R_PPC64_TOC16_LO:
5650 case R_PPC64_TOC16_HI:
5651 case R_PPC64_TOC16_HA:
5652 case R_PPC64_TOC16_LO_DS:
5653 sec->has_toc_reloc = 1;
5654 break;
5655
5656 /* Marker reloc. */
5657 case R_PPC64_ENTRY:
5658 break;
5659
5660 /* This relocation describes the C++ object vtable hierarchy.
5661 Reconstruct it for later use during GC. */
5662 case R_PPC64_GNU_VTINHERIT:
5663 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5664 return FALSE;
5665 break;
5666
5667 /* This relocation describes which C++ vtable entries are actually
5668 used. Record for later use during GC. */
5669 case R_PPC64_GNU_VTENTRY:
5670 BFD_ASSERT (h != NULL);
5671 if (h != NULL
5672 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5673 return FALSE;
5674 break;
5675
5676 case R_PPC64_REL14:
5677 case R_PPC64_REL14_BRTAKEN:
5678 case R_PPC64_REL14_BRNTAKEN:
5679 {
5680 asection *dest = NULL;
5681
5682 /* Heuristic: If jumping outside our section, chances are
5683 we are going to need a stub. */
5684 if (h != NULL)
5685 {
5686 /* If the sym is weak it may be overridden later, so
5687 don't assume we know where a weak sym lives. */
5688 if (h->root.type == bfd_link_hash_defined)
5689 dest = h->root.u.def.section;
5690 }
5691 else
5692 {
5693 Elf_Internal_Sym *isym;
5694
5695 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5696 abfd, r_symndx);
5697 if (isym == NULL)
5698 return FALSE;
5699
5700 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5701 }
5702
5703 if (dest != sec)
5704 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5705 }
5706 /* Fall through. */
5707
5708 case R_PPC64_REL24:
5709 plt_list = ifunc;
5710 if (h != NULL)
5711 {
5712 h->needs_plt = 1;
5713 if (h->root.root.string[0] == '.'
5714 && h->root.root.string[1] != '\0')
5715 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5716
5717 if (h == tga || h == dottga)
5718 {
5719 sec->has_tls_reloc = 1;
5720 if (rel != relocs
5721 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5722 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5723 /* We have a new-style __tls_get_addr call with
5724 a marker reloc. */
5725 ;
5726 else
5727 /* Mark this section as having an old-style call. */
5728 sec->has_tls_get_addr_call = 1;
5729 }
5730 plt_list = &h->plt.plist;
5731 }
5732
5733 /* We may need a .plt entry if the function this reloc
5734 refers to is in a shared lib. */
5735 if (plt_list
5736 && !update_plt_info (abfd, plt_list, rel->r_addend))
5737 return FALSE;
5738 break;
5739
5740 case R_PPC64_ADDR14:
5741 case R_PPC64_ADDR14_BRNTAKEN:
5742 case R_PPC64_ADDR14_BRTAKEN:
5743 case R_PPC64_ADDR24:
5744 goto dodyn;
5745
5746 case R_PPC64_TPREL64:
5747 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5748 if (bfd_link_pic (info))
5749 info->flags |= DF_STATIC_TLS;
5750 goto dotlstoc;
5751
5752 case R_PPC64_DTPMOD64:
5753 if (rel + 1 < rel_end
5754 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5755 && rel[1].r_offset == rel->r_offset + 8)
5756 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5757 else
5758 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5759 goto dotlstoc;
5760
5761 case R_PPC64_DTPREL64:
5762 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5763 if (rel != relocs
5764 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5765 && rel[-1].r_offset == rel->r_offset - 8)
5766 /* This is the second reloc of a dtpmod, dtprel pair.
5767 Don't mark with TLS_DTPREL. */
5768 goto dodyn;
5769
5770 dotlstoc:
5771 sec->has_tls_reloc = 1;
5772 if (h != NULL)
5773 {
5774 struct ppc_link_hash_entry *eh;
5775 eh = (struct ppc_link_hash_entry *) h;
5776 eh->tls_mask |= tls_type;
5777 }
5778 else
5779 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5780 rel->r_addend, tls_type))
5781 return FALSE;
5782
5783 ppc64_sec = ppc64_elf_section_data (sec);
5784 if (ppc64_sec->sec_type != sec_toc)
5785 {
5786 bfd_size_type amt;
5787
5788 /* One extra to simplify get_tls_mask. */
5789 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5790 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5791 if (ppc64_sec->u.toc.symndx == NULL)
5792 return FALSE;
5793 amt = sec->size * sizeof (bfd_vma) / 8;
5794 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5795 if (ppc64_sec->u.toc.add == NULL)
5796 return FALSE;
5797 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5798 ppc64_sec->sec_type = sec_toc;
5799 }
5800 BFD_ASSERT (rel->r_offset % 8 == 0);
5801 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5802 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5803
5804 /* Mark the second slot of a GD or LD entry.
5805 -1 to indicate GD and -2 to indicate LD. */
5806 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5807 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5808 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5809 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5810 goto dodyn;
5811
5812 case R_PPC64_TPREL16:
5813 case R_PPC64_TPREL16_LO:
5814 case R_PPC64_TPREL16_HI:
5815 case R_PPC64_TPREL16_HA:
5816 case R_PPC64_TPREL16_DS:
5817 case R_PPC64_TPREL16_LO_DS:
5818 case R_PPC64_TPREL16_HIGH:
5819 case R_PPC64_TPREL16_HIGHA:
5820 case R_PPC64_TPREL16_HIGHER:
5821 case R_PPC64_TPREL16_HIGHERA:
5822 case R_PPC64_TPREL16_HIGHEST:
5823 case R_PPC64_TPREL16_HIGHESTA:
5824 if (bfd_link_pic (info))
5825 {
5826 info->flags |= DF_STATIC_TLS;
5827 goto dodyn;
5828 }
5829 break;
5830
5831 case R_PPC64_ADDR64:
5832 if (opd_sym_map != NULL
5833 && rel + 1 < rel_end
5834 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5835 {
5836 if (h != NULL)
5837 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5838 else
5839 {
5840 asection *s;
5841 Elf_Internal_Sym *isym;
5842
5843 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5844 abfd, r_symndx);
5845 if (isym == NULL)
5846 return FALSE;
5847
5848 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5849 if (s != NULL && s != sec)
5850 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5851 }
5852 }
5853 /* Fall through. */
5854
5855 case R_PPC64_ADDR16:
5856 case R_PPC64_ADDR16_DS:
5857 case R_PPC64_ADDR16_HA:
5858 case R_PPC64_ADDR16_HI:
5859 case R_PPC64_ADDR16_HIGH:
5860 case R_PPC64_ADDR16_HIGHA:
5861 case R_PPC64_ADDR16_HIGHER:
5862 case R_PPC64_ADDR16_HIGHERA:
5863 case R_PPC64_ADDR16_HIGHEST:
5864 case R_PPC64_ADDR16_HIGHESTA:
5865 case R_PPC64_ADDR16_LO:
5866 case R_PPC64_ADDR16_LO_DS:
5867 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5868 && rel->r_addend == 0)
5869 {
5870 /* We may need a .plt entry if this reloc refers to a
5871 function in a shared lib. */
5872 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5873 return FALSE;
5874 h->pointer_equality_needed = 1;
5875 }
5876 /* Fall through. */
5877
5878 case R_PPC64_REL30:
5879 case R_PPC64_REL32:
5880 case R_PPC64_REL64:
5881 case R_PPC64_ADDR32:
5882 case R_PPC64_UADDR16:
5883 case R_PPC64_UADDR32:
5884 case R_PPC64_UADDR64:
5885 case R_PPC64_TOC:
5886 if (h != NULL && !bfd_link_pic (info))
5887 /* We may need a copy reloc. */
5888 h->non_got_ref = 1;
5889
5890 /* Don't propagate .opd relocs. */
5891 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5892 break;
5893
5894 /* If we are creating a shared library, and this is a reloc
5895 against a global symbol, or a non PC relative reloc
5896 against a local symbol, then we need to copy the reloc
5897 into the shared library. However, if we are linking with
5898 -Bsymbolic, we do not need to copy a reloc against a
5899 global symbol which is defined in an object we are
5900 including in the link (i.e., DEF_REGULAR is set). At
5901 this point we have not seen all the input files, so it is
5902 possible that DEF_REGULAR is not set now but will be set
5903 later (it is never cleared). In case of a weak definition,
5904 DEF_REGULAR may be cleared later by a strong definition in
5905 a shared library. We account for that possibility below by
5906 storing information in the dyn_relocs field of the hash
5907 table entry. A similar situation occurs when creating
5908 shared libraries and symbol visibility changes render the
5909 symbol local.
5910
5911 If on the other hand, we are creating an executable, we
5912 may need to keep relocations for symbols satisfied by a
5913 dynamic library if we manage to avoid copy relocs for the
5914 symbol. */
5915 dodyn:
5916 if ((bfd_link_pic (info)
5917 && (must_be_dyn_reloc (info, r_type)
5918 || (h != NULL
5919 && (!SYMBOLIC_BIND (info, h)
5920 || h->root.type == bfd_link_hash_defweak
5921 || !h->def_regular))))
5922 || (ELIMINATE_COPY_RELOCS
5923 && !bfd_link_pic (info)
5924 && h != NULL
5925 && (h->root.type == bfd_link_hash_defweak
5926 || !h->def_regular))
5927 || (!bfd_link_pic (info)
5928 && ifunc != NULL))
5929 {
5930 /* We must copy these reloc types into the output file.
5931 Create a reloc section in dynobj and make room for
5932 this reloc. */
5933 if (sreloc == NULL)
5934 {
5935 sreloc = _bfd_elf_make_dynamic_reloc_section
5936 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5937
5938 if (sreloc == NULL)
5939 return FALSE;
5940 }
5941
5942 /* If this is a global symbol, we count the number of
5943 relocations we need for this symbol. */
5944 if (h != NULL)
5945 {
5946 struct elf_dyn_relocs *p;
5947 struct elf_dyn_relocs **head;
5948
5949 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5950 p = *head;
5951 if (p == NULL || p->sec != sec)
5952 {
5953 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5954 if (p == NULL)
5955 return FALSE;
5956 p->next = *head;
5957 *head = p;
5958 p->sec = sec;
5959 p->count = 0;
5960 p->pc_count = 0;
5961 }
5962 p->count += 1;
5963 if (!must_be_dyn_reloc (info, r_type))
5964 p->pc_count += 1;
5965 }
5966 else
5967 {
5968 /* Track dynamic relocs needed for local syms too.
5969 We really need local syms available to do this
5970 easily. Oh well. */
5971 struct ppc_dyn_relocs *p;
5972 struct ppc_dyn_relocs **head;
5973 bfd_boolean is_ifunc;
5974 asection *s;
5975 void *vpp;
5976 Elf_Internal_Sym *isym;
5977
5978 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5979 abfd, r_symndx);
5980 if (isym == NULL)
5981 return FALSE;
5982
5983 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5984 if (s == NULL)
5985 s = sec;
5986
5987 vpp = &elf_section_data (s)->local_dynrel;
5988 head = (struct ppc_dyn_relocs **) vpp;
5989 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5990 p = *head;
5991 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5992 p = p->next;
5993 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5994 {
5995 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5996 if (p == NULL)
5997 return FALSE;
5998 p->next = *head;
5999 *head = p;
6000 p->sec = sec;
6001 p->ifunc = is_ifunc;
6002 p->count = 0;
6003 }
6004 p->count += 1;
6005 }
6006 }
6007 break;
6008
6009 default:
6010 break;
6011 }
6012 }
6013
6014 return TRUE;
6015 }
6016
6017 /* Merge backend specific data from an object file to the output
6018 object file when linking. */
6019
6020 static bfd_boolean
6021 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6022 {
6023 bfd *obfd = info->output_bfd;
6024 unsigned long iflags, oflags;
6025
6026 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6027 return TRUE;
6028
6029 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6030 return TRUE;
6031
6032 if (!_bfd_generic_verify_endian_match (ibfd, info))
6033 return FALSE;
6034
6035 iflags = elf_elfheader (ibfd)->e_flags;
6036 oflags = elf_elfheader (obfd)->e_flags;
6037
6038 if (iflags & ~EF_PPC64_ABI)
6039 {
6040 _bfd_error_handler
6041 /* xgettext:c-format */
6042 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6043 bfd_set_error (bfd_error_bad_value);
6044 return FALSE;
6045 }
6046 else if (iflags != oflags && iflags != 0)
6047 {
6048 _bfd_error_handler
6049 /* xgettext:c-format */
6050 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6051 ibfd, iflags, oflags);
6052 bfd_set_error (bfd_error_bad_value);
6053 return FALSE;
6054 }
6055
6056 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6057
6058 /* Merge Tag_compatibility attributes and any common GNU ones. */
6059 _bfd_elf_merge_object_attributes (ibfd, info);
6060
6061 return TRUE;
6062 }
6063
6064 static bfd_boolean
6065 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6066 {
6067 /* Print normal ELF private data. */
6068 _bfd_elf_print_private_bfd_data (abfd, ptr);
6069
6070 if (elf_elfheader (abfd)->e_flags != 0)
6071 {
6072 FILE *file = ptr;
6073
6074 fprintf (file, _("private flags = 0x%lx:"),
6075 elf_elfheader (abfd)->e_flags);
6076
6077 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6078 fprintf (file, _(" [abiv%ld]"),
6079 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6080 fputc ('\n', file);
6081 }
6082
6083 return TRUE;
6084 }
6085
6086 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6087 of the code entry point, and its section, which must be in the same
6088 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6089
6090 static bfd_vma
6091 opd_entry_value (asection *opd_sec,
6092 bfd_vma offset,
6093 asection **code_sec,
6094 bfd_vma *code_off,
6095 bfd_boolean in_code_sec)
6096 {
6097 bfd *opd_bfd = opd_sec->owner;
6098 Elf_Internal_Rela *relocs;
6099 Elf_Internal_Rela *lo, *hi, *look;
6100 bfd_vma val;
6101
6102 /* No relocs implies we are linking a --just-symbols object, or looking
6103 at a final linked executable with addr2line or somesuch. */
6104 if (opd_sec->reloc_count == 0)
6105 {
6106 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6107
6108 if (contents == NULL)
6109 {
6110 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6111 return (bfd_vma) -1;
6112 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6113 }
6114
6115 /* PR 17512: file: 64b9dfbb. */
6116 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6117 return (bfd_vma) -1;
6118
6119 val = bfd_get_64 (opd_bfd, contents + offset);
6120 if (code_sec != NULL)
6121 {
6122 asection *sec, *likely = NULL;
6123
6124 if (in_code_sec)
6125 {
6126 sec = *code_sec;
6127 if (sec->vma <= val
6128 && val < sec->vma + sec->size)
6129 likely = sec;
6130 else
6131 val = -1;
6132 }
6133 else
6134 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6135 if (sec->vma <= val
6136 && (sec->flags & SEC_LOAD) != 0
6137 && (sec->flags & SEC_ALLOC) != 0)
6138 likely = sec;
6139 if (likely != NULL)
6140 {
6141 *code_sec = likely;
6142 if (code_off != NULL)
6143 *code_off = val - likely->vma;
6144 }
6145 }
6146 return val;
6147 }
6148
6149 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6150
6151 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6152 if (relocs == NULL)
6153 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6154 /* PR 17512: file: df8e1fd6. */
6155 if (relocs == NULL)
6156 return (bfd_vma) -1;
6157
6158 /* Go find the opd reloc at the sym address. */
6159 lo = relocs;
6160 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6161 val = (bfd_vma) -1;
6162 while (lo < hi)
6163 {
6164 look = lo + (hi - lo) / 2;
6165 if (look->r_offset < offset)
6166 lo = look + 1;
6167 else if (look->r_offset > offset)
6168 hi = look;
6169 else
6170 {
6171 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6172
6173 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6174 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6175 {
6176 unsigned long symndx = ELF64_R_SYM (look->r_info);
6177 asection *sec = NULL;
6178
6179 if (symndx >= symtab_hdr->sh_info
6180 && elf_sym_hashes (opd_bfd) != NULL)
6181 {
6182 struct elf_link_hash_entry **sym_hashes;
6183 struct elf_link_hash_entry *rh;
6184
6185 sym_hashes = elf_sym_hashes (opd_bfd);
6186 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6187 if (rh != NULL)
6188 {
6189 rh = elf_follow_link (rh);
6190 if (rh->root.type != bfd_link_hash_defined
6191 && rh->root.type != bfd_link_hash_defweak)
6192 break;
6193 if (rh->root.u.def.section->owner == opd_bfd)
6194 {
6195 val = rh->root.u.def.value;
6196 sec = rh->root.u.def.section;
6197 }
6198 }
6199 }
6200
6201 if (sec == NULL)
6202 {
6203 Elf_Internal_Sym *sym;
6204
6205 if (symndx < symtab_hdr->sh_info)
6206 {
6207 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6208 if (sym == NULL)
6209 {
6210 size_t symcnt = symtab_hdr->sh_info;
6211 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6212 symcnt, 0,
6213 NULL, NULL, NULL);
6214 if (sym == NULL)
6215 break;
6216 symtab_hdr->contents = (bfd_byte *) sym;
6217 }
6218 sym += symndx;
6219 }
6220 else
6221 {
6222 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6223 1, symndx,
6224 NULL, NULL, NULL);
6225 if (sym == NULL)
6226 break;
6227 }
6228 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6229 if (sec == NULL)
6230 break;
6231 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6232 val = sym->st_value;
6233 }
6234
6235 val += look->r_addend;
6236 if (code_off != NULL)
6237 *code_off = val;
6238 if (code_sec != NULL)
6239 {
6240 if (in_code_sec && *code_sec != sec)
6241 return -1;
6242 else
6243 *code_sec = sec;
6244 }
6245 if (sec->output_section != NULL)
6246 val += sec->output_section->vma + sec->output_offset;
6247 }
6248 break;
6249 }
6250 }
6251
6252 return val;
6253 }
6254
6255 /* If the ELF symbol SYM might be a function in SEC, return the
6256 function size and set *CODE_OFF to the function's entry point,
6257 otherwise return zero. */
6258
6259 static bfd_size_type
6260 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6261 bfd_vma *code_off)
6262 {
6263 bfd_size_type size;
6264
6265 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6266 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6267 return 0;
6268
6269 size = 0;
6270 if (!(sym->flags & BSF_SYNTHETIC))
6271 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6272
6273 if (strcmp (sym->section->name, ".opd") == 0)
6274 {
6275 struct _opd_sec_data *opd = get_opd_info (sym->section);
6276 bfd_vma symval = sym->value;
6277
6278 if (opd != NULL
6279 && opd->adjust != NULL
6280 && elf_section_data (sym->section)->relocs != NULL)
6281 {
6282 /* opd_entry_value will use cached relocs that have been
6283 adjusted, but with raw symbols. That means both local
6284 and global symbols need adjusting. */
6285 long adjust = opd->adjust[OPD_NDX (symval)];
6286 if (adjust == -1)
6287 return 0;
6288 symval += adjust;
6289 }
6290
6291 if (opd_entry_value (sym->section, symval,
6292 &sec, code_off, TRUE) == (bfd_vma) -1)
6293 return 0;
6294 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6295 symbol. This size has nothing to do with the code size of the
6296 function, which is what we're supposed to return, but the
6297 code size isn't available without looking up the dot-sym.
6298 However, doing that would be a waste of time particularly
6299 since elf_find_function will look at the dot-sym anyway.
6300 Now, elf_find_function will keep the largest size of any
6301 function sym found at the code address of interest, so return
6302 1 here to avoid it incorrectly caching a larger function size
6303 for a small function. This does mean we return the wrong
6304 size for a new-ABI function of size 24, but all that does is
6305 disable caching for such functions. */
6306 if (size == 24)
6307 size = 1;
6308 }
6309 else
6310 {
6311 if (sym->section != sec)
6312 return 0;
6313 *code_off = sym->value;
6314 }
6315 if (size == 0)
6316 size = 1;
6317 return size;
6318 }
6319
6320 /* Return true if symbol is defined in a regular object file. */
6321
6322 static bfd_boolean
6323 is_static_defined (struct elf_link_hash_entry *h)
6324 {
6325 return ((h->root.type == bfd_link_hash_defined
6326 || h->root.type == bfd_link_hash_defweak)
6327 && h->root.u.def.section != NULL
6328 && h->root.u.def.section->output_section != NULL);
6329 }
6330
6331 /* If FDH is a function descriptor symbol, return the associated code
6332 entry symbol if it is defined. Return NULL otherwise. */
6333
6334 static struct ppc_link_hash_entry *
6335 defined_code_entry (struct ppc_link_hash_entry *fdh)
6336 {
6337 if (fdh->is_func_descriptor)
6338 {
6339 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6340 if (fh->elf.root.type == bfd_link_hash_defined
6341 || fh->elf.root.type == bfd_link_hash_defweak)
6342 return fh;
6343 }
6344 return NULL;
6345 }
6346
6347 /* If FH is a function code entry symbol, return the associated
6348 function descriptor symbol if it is defined. Return NULL otherwise. */
6349
6350 static struct ppc_link_hash_entry *
6351 defined_func_desc (struct ppc_link_hash_entry *fh)
6352 {
6353 if (fh->oh != NULL
6354 && fh->oh->is_func_descriptor)
6355 {
6356 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6357 if (fdh->elf.root.type == bfd_link_hash_defined
6358 || fdh->elf.root.type == bfd_link_hash_defweak)
6359 return fdh;
6360 }
6361 return NULL;
6362 }
6363
6364 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6365
6366 /* Garbage collect sections, after first dealing with dot-symbols. */
6367
6368 static bfd_boolean
6369 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6370 {
6371 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6372
6373 if (htab != NULL && htab->need_func_desc_adj)
6374 {
6375 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6376 htab->need_func_desc_adj = 0;
6377 }
6378 return bfd_elf_gc_sections (abfd, info);
6379 }
6380
6381 /* Mark all our entry sym sections, both opd and code section. */
6382
6383 static void
6384 ppc64_elf_gc_keep (struct bfd_link_info *info)
6385 {
6386 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6387 struct bfd_sym_chain *sym;
6388
6389 if (htab == NULL)
6390 return;
6391
6392 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6393 {
6394 struct ppc_link_hash_entry *eh, *fh;
6395 asection *sec;
6396
6397 eh = (struct ppc_link_hash_entry *)
6398 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6399 if (eh == NULL)
6400 continue;
6401 if (eh->elf.root.type != bfd_link_hash_defined
6402 && eh->elf.root.type != bfd_link_hash_defweak)
6403 continue;
6404
6405 fh = defined_code_entry (eh);
6406 if (fh != NULL)
6407 {
6408 sec = fh->elf.root.u.def.section;
6409 sec->flags |= SEC_KEEP;
6410 }
6411 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6412 && opd_entry_value (eh->elf.root.u.def.section,
6413 eh->elf.root.u.def.value,
6414 &sec, NULL, FALSE) != (bfd_vma) -1)
6415 sec->flags |= SEC_KEEP;
6416
6417 sec = eh->elf.root.u.def.section;
6418 sec->flags |= SEC_KEEP;
6419 }
6420 }
6421
6422 /* Mark sections containing dynamically referenced symbols. When
6423 building shared libraries, we must assume that any visible symbol is
6424 referenced. */
6425
6426 static bfd_boolean
6427 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6428 {
6429 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6430 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6431 struct ppc_link_hash_entry *fdh;
6432 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6433
6434 /* Dynamic linking info is on the func descriptor sym. */
6435 fdh = defined_func_desc (eh);
6436 if (fdh != NULL)
6437 eh = fdh;
6438
6439 if ((eh->elf.root.type == bfd_link_hash_defined
6440 || eh->elf.root.type == bfd_link_hash_defweak)
6441 && (eh->elf.ref_dynamic
6442 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6443 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6444 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6445 && (!bfd_link_executable (info)
6446 || info->gc_keep_exported
6447 || info->export_dynamic
6448 || (eh->elf.dynamic
6449 && d != NULL
6450 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6451 && (eh->elf.versioned >= versioned
6452 || !bfd_hide_sym_by_version (info->version_info,
6453 eh->elf.root.root.string)))))
6454 {
6455 asection *code_sec;
6456 struct ppc_link_hash_entry *fh;
6457
6458 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6459
6460 /* Function descriptor syms cause the associated
6461 function code sym section to be marked. */
6462 fh = defined_code_entry (eh);
6463 if (fh != NULL)
6464 {
6465 code_sec = fh->elf.root.u.def.section;
6466 code_sec->flags |= SEC_KEEP;
6467 }
6468 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6469 && opd_entry_value (eh->elf.root.u.def.section,
6470 eh->elf.root.u.def.value,
6471 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6472 code_sec->flags |= SEC_KEEP;
6473 }
6474
6475 return TRUE;
6476 }
6477
6478 /* Return the section that should be marked against GC for a given
6479 relocation. */
6480
6481 static asection *
6482 ppc64_elf_gc_mark_hook (asection *sec,
6483 struct bfd_link_info *info,
6484 Elf_Internal_Rela *rel,
6485 struct elf_link_hash_entry *h,
6486 Elf_Internal_Sym *sym)
6487 {
6488 asection *rsec;
6489
6490 /* Syms return NULL if we're marking .opd, so we avoid marking all
6491 function sections, as all functions are referenced in .opd. */
6492 rsec = NULL;
6493 if (get_opd_info (sec) != NULL)
6494 return rsec;
6495
6496 if (h != NULL)
6497 {
6498 enum elf_ppc64_reloc_type r_type;
6499 struct ppc_link_hash_entry *eh, *fh, *fdh;
6500
6501 r_type = ELF64_R_TYPE (rel->r_info);
6502 switch (r_type)
6503 {
6504 case R_PPC64_GNU_VTINHERIT:
6505 case R_PPC64_GNU_VTENTRY:
6506 break;
6507
6508 default:
6509 switch (h->root.type)
6510 {
6511 case bfd_link_hash_defined:
6512 case bfd_link_hash_defweak:
6513 eh = (struct ppc_link_hash_entry *) h;
6514 fdh = defined_func_desc (eh);
6515 if (fdh != NULL)
6516 {
6517 /* -mcall-aixdesc code references the dot-symbol on
6518 a call reloc. Mark the function descriptor too
6519 against garbage collection. */
6520 fdh->elf.mark = 1;
6521 if (fdh->elf.u.weakdef != NULL)
6522 fdh->elf.u.weakdef->mark = 1;
6523 eh = fdh;
6524 }
6525
6526 /* Function descriptor syms cause the associated
6527 function code sym section to be marked. */
6528 fh = defined_code_entry (eh);
6529 if (fh != NULL)
6530 {
6531 /* They also mark their opd section. */
6532 eh->elf.root.u.def.section->gc_mark = 1;
6533
6534 rsec = fh->elf.root.u.def.section;
6535 }
6536 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6537 && opd_entry_value (eh->elf.root.u.def.section,
6538 eh->elf.root.u.def.value,
6539 &rsec, NULL, FALSE) != (bfd_vma) -1)
6540 eh->elf.root.u.def.section->gc_mark = 1;
6541 else
6542 rsec = h->root.u.def.section;
6543 break;
6544
6545 case bfd_link_hash_common:
6546 rsec = h->root.u.c.p->section;
6547 break;
6548
6549 default:
6550 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6551 }
6552 }
6553 }
6554 else
6555 {
6556 struct _opd_sec_data *opd;
6557
6558 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6559 opd = get_opd_info (rsec);
6560 if (opd != NULL && opd->func_sec != NULL)
6561 {
6562 rsec->gc_mark = 1;
6563
6564 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6565 }
6566 }
6567
6568 return rsec;
6569 }
6570
6571 /* Update the .got, .plt. and dynamic reloc reference counts for the
6572 section being removed. */
6573
6574 static bfd_boolean
6575 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6576 asection *sec, const Elf_Internal_Rela *relocs)
6577 {
6578 struct ppc_link_hash_table *htab;
6579 Elf_Internal_Shdr *symtab_hdr;
6580 struct elf_link_hash_entry **sym_hashes;
6581 struct got_entry **local_got_ents;
6582 const Elf_Internal_Rela *rel, *relend;
6583
6584 if (bfd_link_relocatable (info))
6585 return TRUE;
6586
6587 if ((sec->flags & SEC_ALLOC) == 0)
6588 return TRUE;
6589
6590 elf_section_data (sec)->local_dynrel = NULL;
6591
6592 htab = ppc_hash_table (info);
6593 if (htab == NULL)
6594 return FALSE;
6595
6596 symtab_hdr = &elf_symtab_hdr (abfd);
6597 sym_hashes = elf_sym_hashes (abfd);
6598 local_got_ents = elf_local_got_ents (abfd);
6599
6600 relend = relocs + sec->reloc_count;
6601 for (rel = relocs; rel < relend; rel++)
6602 {
6603 unsigned long r_symndx;
6604 enum elf_ppc64_reloc_type r_type;
6605 struct elf_link_hash_entry *h = NULL;
6606 struct plt_entry **plt_list = NULL;
6607 unsigned char tls_type = 0;
6608
6609 r_symndx = ELF64_R_SYM (rel->r_info);
6610 r_type = ELF64_R_TYPE (rel->r_info);
6611 if (r_symndx >= symtab_hdr->sh_info)
6612 {
6613 struct ppc_link_hash_entry *eh;
6614 struct elf_dyn_relocs **pp;
6615 struct elf_dyn_relocs *p;
6616
6617 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6618 h = elf_follow_link (h);
6619 eh = (struct ppc_link_hash_entry *) h;
6620
6621 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6622 if (p->sec == sec)
6623 {
6624 /* Everything must go for SEC. */
6625 *pp = p->next;
6626 break;
6627 }
6628 }
6629
6630 switch (r_type)
6631 {
6632 case R_PPC64_GOT_TLSLD16:
6633 case R_PPC64_GOT_TLSLD16_LO:
6634 case R_PPC64_GOT_TLSLD16_HI:
6635 case R_PPC64_GOT_TLSLD16_HA:
6636 tls_type = TLS_TLS | TLS_LD;
6637 goto dogot;
6638
6639 case R_PPC64_GOT_TLSGD16:
6640 case R_PPC64_GOT_TLSGD16_LO:
6641 case R_PPC64_GOT_TLSGD16_HI:
6642 case R_PPC64_GOT_TLSGD16_HA:
6643 tls_type = TLS_TLS | TLS_GD;
6644 goto dogot;
6645
6646 case R_PPC64_GOT_TPREL16_DS:
6647 case R_PPC64_GOT_TPREL16_LO_DS:
6648 case R_PPC64_GOT_TPREL16_HI:
6649 case R_PPC64_GOT_TPREL16_HA:
6650 tls_type = TLS_TLS | TLS_TPREL;
6651 goto dogot;
6652
6653 case R_PPC64_GOT_DTPREL16_DS:
6654 case R_PPC64_GOT_DTPREL16_LO_DS:
6655 case R_PPC64_GOT_DTPREL16_HI:
6656 case R_PPC64_GOT_DTPREL16_HA:
6657 tls_type = TLS_TLS | TLS_DTPREL;
6658 goto dogot;
6659
6660 case R_PPC64_GOT16:
6661 case R_PPC64_GOT16_DS:
6662 case R_PPC64_GOT16_HA:
6663 case R_PPC64_GOT16_HI:
6664 case R_PPC64_GOT16_LO:
6665 case R_PPC64_GOT16_LO_DS:
6666 dogot:
6667 {
6668 struct got_entry *ent;
6669
6670 if (h != NULL)
6671 ent = h->got.glist;
6672 else
6673 ent = local_got_ents[r_symndx];
6674
6675 for (; ent != NULL; ent = ent->next)
6676 if (ent->addend == rel->r_addend
6677 && ent->owner == abfd
6678 && ent->tls_type == tls_type)
6679 break;
6680 if (ent == NULL)
6681 abort ();
6682 if (ent->got.refcount > 0)
6683 ent->got.refcount -= 1;
6684 }
6685 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
6686 plt_list = &h->plt.plist;
6687 break;
6688
6689 case R_PPC64_PLT16_HA:
6690 case R_PPC64_PLT16_HI:
6691 case R_PPC64_PLT16_LO:
6692 case R_PPC64_PLT32:
6693 case R_PPC64_PLT64:
6694 case R_PPC64_REL14:
6695 case R_PPC64_REL14_BRNTAKEN:
6696 case R_PPC64_REL14_BRTAKEN:
6697 case R_PPC64_REL24:
6698 if (h != NULL)
6699 plt_list = &h->plt.plist;
6700 else if (local_got_ents != NULL)
6701 {
6702 struct plt_entry **local_plt = (struct plt_entry **)
6703 (local_got_ents + symtab_hdr->sh_info);
6704 unsigned char *local_got_tls_masks = (unsigned char *)
6705 (local_plt + symtab_hdr->sh_info);
6706 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6707 plt_list = local_plt + r_symndx;
6708 }
6709 break;
6710
6711 case R_PPC64_ADDR64:
6712 case R_PPC64_ADDR16:
6713 case R_PPC64_ADDR16_DS:
6714 case R_PPC64_ADDR16_HA:
6715 case R_PPC64_ADDR16_HI:
6716 case R_PPC64_ADDR16_HIGH:
6717 case R_PPC64_ADDR16_HIGHA:
6718 case R_PPC64_ADDR16_HIGHER:
6719 case R_PPC64_ADDR16_HIGHERA:
6720 case R_PPC64_ADDR16_HIGHEST:
6721 case R_PPC64_ADDR16_HIGHESTA:
6722 case R_PPC64_ADDR16_LO:
6723 case R_PPC64_ADDR16_LO_DS:
6724 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
6725 && rel->r_addend == 0)
6726 plt_list = &h->plt.plist;
6727 break;
6728
6729 default:
6730 break;
6731 }
6732 if (plt_list != NULL)
6733 {
6734 struct plt_entry *ent;
6735
6736 for (ent = *plt_list; ent != NULL; ent = ent->next)
6737 if (ent->addend == rel->r_addend)
6738 break;
6739 if (ent != NULL && ent->plt.refcount > 0)
6740 ent->plt.refcount -= 1;
6741 }
6742 }
6743 return TRUE;
6744 }
6745
6746 /* The maximum size of .sfpr. */
6747 #define SFPR_MAX (218*4)
6748
6749 struct sfpr_def_parms
6750 {
6751 const char name[12];
6752 unsigned char lo, hi;
6753 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6754 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6755 };
6756
6757 /* Auto-generate _save*, _rest* functions in .sfpr.
6758 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6759 instead. */
6760
6761 static bfd_boolean
6762 sfpr_define (struct bfd_link_info *info,
6763 const struct sfpr_def_parms *parm,
6764 asection *stub_sec)
6765 {
6766 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6767 unsigned int i;
6768 size_t len = strlen (parm->name);
6769 bfd_boolean writing = FALSE;
6770 char sym[16];
6771
6772 if (htab == NULL)
6773 return FALSE;
6774
6775 memcpy (sym, parm->name, len);
6776 sym[len + 2] = 0;
6777
6778 for (i = parm->lo; i <= parm->hi; i++)
6779 {
6780 struct ppc_link_hash_entry *h;
6781
6782 sym[len + 0] = i / 10 + '0';
6783 sym[len + 1] = i % 10 + '0';
6784 h = (struct ppc_link_hash_entry *)
6785 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6786 if (stub_sec != NULL)
6787 {
6788 if (h != NULL
6789 && h->elf.root.type == bfd_link_hash_defined
6790 && h->elf.root.u.def.section == htab->sfpr)
6791 {
6792 struct elf_link_hash_entry *s;
6793 char buf[32];
6794 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6795 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6796 if (s == NULL)
6797 return FALSE;
6798 if (s->root.type == bfd_link_hash_new
6799 || (s->root.type = bfd_link_hash_defined
6800 && s->root.u.def.section == stub_sec))
6801 {
6802 s->root.type = bfd_link_hash_defined;
6803 s->root.u.def.section = stub_sec;
6804 s->root.u.def.value = (stub_sec->size
6805 + h->elf.root.u.def.value);
6806 s->ref_regular = 1;
6807 s->def_regular = 1;
6808 s->ref_regular_nonweak = 1;
6809 s->forced_local = 1;
6810 s->non_elf = 0;
6811 s->root.linker_def = 1;
6812 }
6813 }
6814 continue;
6815 }
6816 if (h != NULL)
6817 {
6818 h->save_res = 1;
6819 if (!h->elf.def_regular)
6820 {
6821 h->elf.root.type = bfd_link_hash_defined;
6822 h->elf.root.u.def.section = htab->sfpr;
6823 h->elf.root.u.def.value = htab->sfpr->size;
6824 h->elf.type = STT_FUNC;
6825 h->elf.def_regular = 1;
6826 h->elf.non_elf = 0;
6827 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6828 writing = TRUE;
6829 if (htab->sfpr->contents == NULL)
6830 {
6831 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6832 if (htab->sfpr->contents == NULL)
6833 return FALSE;
6834 }
6835 }
6836 }
6837 if (writing)
6838 {
6839 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6840 if (i != parm->hi)
6841 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6842 else
6843 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6844 htab->sfpr->size = p - htab->sfpr->contents;
6845 }
6846 }
6847
6848 return TRUE;
6849 }
6850
6851 static bfd_byte *
6852 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6853 {
6854 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6855 return p + 4;
6856 }
6857
6858 static bfd_byte *
6859 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6860 {
6861 p = savegpr0 (abfd, p, r);
6862 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6863 p = p + 4;
6864 bfd_put_32 (abfd, BLR, p);
6865 return p + 4;
6866 }
6867
6868 static bfd_byte *
6869 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6870 {
6871 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6872 return p + 4;
6873 }
6874
6875 static bfd_byte *
6876 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6877 {
6878 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6879 p = p + 4;
6880 p = restgpr0 (abfd, p, r);
6881 bfd_put_32 (abfd, MTLR_R0, p);
6882 p = p + 4;
6883 if (r == 29)
6884 {
6885 p = restgpr0 (abfd, p, 30);
6886 p = restgpr0 (abfd, p, 31);
6887 }
6888 bfd_put_32 (abfd, BLR, p);
6889 return p + 4;
6890 }
6891
6892 static bfd_byte *
6893 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6894 {
6895 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6896 return p + 4;
6897 }
6898
6899 static bfd_byte *
6900 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6901 {
6902 p = savegpr1 (abfd, p, r);
6903 bfd_put_32 (abfd, BLR, p);
6904 return p + 4;
6905 }
6906
6907 static bfd_byte *
6908 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6909 {
6910 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6911 return p + 4;
6912 }
6913
6914 static bfd_byte *
6915 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6916 {
6917 p = restgpr1 (abfd, p, r);
6918 bfd_put_32 (abfd, BLR, p);
6919 return p + 4;
6920 }
6921
6922 static bfd_byte *
6923 savefpr (bfd *abfd, bfd_byte *p, int r)
6924 {
6925 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6926 return p + 4;
6927 }
6928
6929 static bfd_byte *
6930 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6931 {
6932 p = savefpr (abfd, p, r);
6933 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6934 p = p + 4;
6935 bfd_put_32 (abfd, BLR, p);
6936 return p + 4;
6937 }
6938
6939 static bfd_byte *
6940 restfpr (bfd *abfd, bfd_byte *p, int r)
6941 {
6942 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6943 return p + 4;
6944 }
6945
6946 static bfd_byte *
6947 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6948 {
6949 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6950 p = p + 4;
6951 p = restfpr (abfd, p, r);
6952 bfd_put_32 (abfd, MTLR_R0, p);
6953 p = p + 4;
6954 if (r == 29)
6955 {
6956 p = restfpr (abfd, p, 30);
6957 p = restfpr (abfd, p, 31);
6958 }
6959 bfd_put_32 (abfd, BLR, p);
6960 return p + 4;
6961 }
6962
6963 static bfd_byte *
6964 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6965 {
6966 p = savefpr (abfd, p, r);
6967 bfd_put_32 (abfd, BLR, p);
6968 return p + 4;
6969 }
6970
6971 static bfd_byte *
6972 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6973 {
6974 p = restfpr (abfd, p, r);
6975 bfd_put_32 (abfd, BLR, p);
6976 return p + 4;
6977 }
6978
6979 static bfd_byte *
6980 savevr (bfd *abfd, bfd_byte *p, int r)
6981 {
6982 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6983 p = p + 4;
6984 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6985 return p + 4;
6986 }
6987
6988 static bfd_byte *
6989 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6990 {
6991 p = savevr (abfd, p, r);
6992 bfd_put_32 (abfd, BLR, p);
6993 return p + 4;
6994 }
6995
6996 static bfd_byte *
6997 restvr (bfd *abfd, bfd_byte *p, int r)
6998 {
6999 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7000 p = p + 4;
7001 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
7002 return p + 4;
7003 }
7004
7005 static bfd_byte *
7006 restvr_tail (bfd *abfd, bfd_byte *p, int r)
7007 {
7008 p = restvr (abfd, p, r);
7009 bfd_put_32 (abfd, BLR, p);
7010 return p + 4;
7011 }
7012
7013 /* Called via elf_link_hash_traverse to transfer dynamic linking
7014 information on function code symbol entries to their corresponding
7015 function descriptor symbol entries. */
7016
7017 static bfd_boolean
7018 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
7019 {
7020 struct bfd_link_info *info;
7021 struct ppc_link_hash_table *htab;
7022 struct ppc_link_hash_entry *fh;
7023 struct ppc_link_hash_entry *fdh;
7024 bfd_boolean force_local;
7025
7026 fh = (struct ppc_link_hash_entry *) h;
7027 if (fh->elf.root.type == bfd_link_hash_indirect)
7028 return TRUE;
7029
7030 if (!fh->is_func)
7031 return TRUE;
7032
7033 if (fh->elf.root.root.string[0] != '.'
7034 || fh->elf.root.root.string[1] == '\0')
7035 return TRUE;
7036
7037 info = inf;
7038 htab = ppc_hash_table (info);
7039 if (htab == NULL)
7040 return FALSE;
7041
7042 /* Find the corresponding function descriptor symbol. */
7043 fdh = lookup_fdh (fh, htab);
7044
7045 /* Resolve undefined references to dot-symbols as the value
7046 in the function descriptor, if we have one in a regular object.
7047 This is to satisfy cases like ".quad .foo". Calls to functions
7048 in dynamic objects are handled elsewhere. */
7049 if ((fh->elf.root.type == bfd_link_hash_undefined
7050 || fh->elf.root.type == bfd_link_hash_undefweak)
7051 && (fdh->elf.root.type == bfd_link_hash_defined
7052 || fdh->elf.root.type == bfd_link_hash_defweak)
7053 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7054 && opd_entry_value (fdh->elf.root.u.def.section,
7055 fdh->elf.root.u.def.value,
7056 &fh->elf.root.u.def.section,
7057 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7058 {
7059 fh->elf.root.type = fdh->elf.root.type;
7060 fh->elf.forced_local = 1;
7061 fh->elf.def_regular = fdh->elf.def_regular;
7062 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7063 }
7064
7065 if (!fh->elf.dynamic)
7066 {
7067 struct plt_entry *ent;
7068
7069 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7070 if (ent->plt.refcount > 0)
7071 break;
7072 if (ent == NULL)
7073 return TRUE;
7074 }
7075
7076 /* Create a descriptor as undefined if necessary. */
7077 if (fdh == NULL
7078 && !bfd_link_executable (info)
7079 && (fh->elf.root.type == bfd_link_hash_undefined
7080 || fh->elf.root.type == bfd_link_hash_undefweak))
7081 {
7082 fdh = make_fdh (info, fh);
7083 if (fdh == NULL)
7084 return FALSE;
7085 }
7086
7087 /* We can't support overriding of symbols on a fake descriptor. */
7088 if (fdh != NULL
7089 && fdh->fake
7090 && (fh->elf.root.type == bfd_link_hash_defined
7091 || fh->elf.root.type == bfd_link_hash_defweak))
7092 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7093
7094 /* Transfer dynamic linking information to the function descriptor. */
7095 if (fdh != NULL)
7096 {
7097 fdh->elf.ref_regular |= fh->elf.ref_regular;
7098 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7099 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7100 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7101 fdh->elf.dynamic |= fh->elf.dynamic;
7102 fdh->elf.needs_plt |= (fh->elf.needs_plt
7103 || fh->elf.type == STT_FUNC
7104 || fh->elf.type == STT_GNU_IFUNC);
7105 move_plt_plist (fh, fdh);
7106
7107 if (!fdh->elf.forced_local
7108 && fh->elf.dynindx != -1)
7109 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7110 return FALSE;
7111 }
7112
7113 /* Now that the info is on the function descriptor, clear the
7114 function code sym info. Any function code syms for which we
7115 don't have a definition in a regular file, we force local.
7116 This prevents a shared library from exporting syms that have
7117 been imported from another library. Function code syms that
7118 are really in the library we must leave global to prevent the
7119 linker dragging in a definition from a static library. */
7120 force_local = (!fh->elf.def_regular
7121 || fdh == NULL
7122 || !fdh->elf.def_regular
7123 || fdh->elf.forced_local);
7124 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7125
7126 return TRUE;
7127 }
7128
7129 static const struct sfpr_def_parms save_res_funcs[] =
7130 {
7131 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7132 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7133 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7134 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7135 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7136 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7137 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7138 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7139 { "._savef", 14, 31, savefpr, savefpr1_tail },
7140 { "._restf", 14, 31, restfpr, restfpr1_tail },
7141 { "_savevr_", 20, 31, savevr, savevr_tail },
7142 { "_restvr_", 20, 31, restvr, restvr_tail }
7143 };
7144
7145 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7146 this hook to a) provide some gcc support functions, and b) transfer
7147 dynamic linking information gathered so far on function code symbol
7148 entries, to their corresponding function descriptor symbol entries. */
7149
7150 static bfd_boolean
7151 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7152 struct bfd_link_info *info)
7153 {
7154 struct ppc_link_hash_table *htab;
7155
7156 htab = ppc_hash_table (info);
7157 if (htab == NULL)
7158 return FALSE;
7159
7160 /* Provide any missing _save* and _rest* functions. */
7161 if (htab->sfpr != NULL)
7162 {
7163 unsigned int i;
7164
7165 htab->sfpr->size = 0;
7166 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7167 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7168 return FALSE;
7169 if (htab->sfpr->size == 0)
7170 htab->sfpr->flags |= SEC_EXCLUDE;
7171 }
7172
7173 if (bfd_link_relocatable (info))
7174 return TRUE;
7175
7176 if (htab->elf.hgot != NULL)
7177 {
7178 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7179 /* Make .TOC. defined so as to prevent it being made dynamic.
7180 The wrong value here is fixed later in ppc64_elf_set_toc. */
7181 if (!htab->elf.hgot->def_regular
7182 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7183 {
7184 htab->elf.hgot->root.type = bfd_link_hash_defined;
7185 htab->elf.hgot->root.u.def.value = 0;
7186 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7187 htab->elf.hgot->def_regular = 1;
7188 htab->elf.hgot->root.linker_def = 1;
7189 }
7190 htab->elf.hgot->type = STT_OBJECT;
7191 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7192 | STV_HIDDEN);
7193 }
7194
7195 if (htab->need_func_desc_adj)
7196 {
7197 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7198 htab->need_func_desc_adj = 0;
7199 }
7200
7201 return TRUE;
7202 }
7203
7204 /* Return true if we have dynamic relocs against H that apply to
7205 read-only sections. */
7206
7207 static bfd_boolean
7208 readonly_dynrelocs (struct elf_link_hash_entry *h)
7209 {
7210 struct ppc_link_hash_entry *eh;
7211 struct elf_dyn_relocs *p;
7212
7213 eh = (struct ppc_link_hash_entry *) h;
7214 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7215 {
7216 asection *s = p->sec->output_section;
7217
7218 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7219 return TRUE;
7220 }
7221 return FALSE;
7222 }
7223
7224 /* Return true if we have dynamic relocs against H or any of its weak
7225 aliases, that apply to read-only sections. */
7226
7227 static bfd_boolean
7228 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7229 {
7230 struct ppc_link_hash_entry *eh;
7231
7232 eh = (struct ppc_link_hash_entry *) h;
7233 do
7234 {
7235 if (readonly_dynrelocs (&eh->elf))
7236 return TRUE;
7237 eh = eh->weakref;
7238 } while (eh != NULL && &eh->elf != h);
7239
7240 return FALSE;
7241 }
7242
7243 /* Return whether EH has pc-relative dynamic relocs. */
7244
7245 static bfd_boolean
7246 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7247 {
7248 struct elf_dyn_relocs *p;
7249
7250 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7251 if (p->pc_count != 0)
7252 return TRUE;
7253 return FALSE;
7254 }
7255
7256 /* Return true if a global entry stub will be created for H. Valid
7257 for ELFv2 before plt entries have been allocated. */
7258
7259 static bfd_boolean
7260 global_entry_stub (struct elf_link_hash_entry *h)
7261 {
7262 struct plt_entry *pent;
7263
7264 if (!h->pointer_equality_needed
7265 || h->def_regular)
7266 return FALSE;
7267
7268 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7269 if (pent->plt.refcount > 0
7270 && pent->addend == 0)
7271 return TRUE;
7272
7273 return FALSE;
7274 }
7275
7276 /* Adjust a symbol defined by a dynamic object and referenced by a
7277 regular object. The current definition is in some section of the
7278 dynamic object, but we're not including those sections. We have to
7279 change the definition to something the rest of the link can
7280 understand. */
7281
7282 static bfd_boolean
7283 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7284 struct elf_link_hash_entry *h)
7285 {
7286 struct ppc_link_hash_table *htab;
7287 asection *s, *srel;
7288
7289 htab = ppc_hash_table (info);
7290 if (htab == NULL)
7291 return FALSE;
7292
7293 /* Deal with function syms. */
7294 if (h->type == STT_FUNC
7295 || h->type == STT_GNU_IFUNC
7296 || h->needs_plt)
7297 {
7298 /* Clear procedure linkage table information for any symbol that
7299 won't need a .plt entry. */
7300 struct plt_entry *ent;
7301 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7302 if (ent->plt.refcount > 0)
7303 break;
7304 if (ent == NULL
7305 || (h->type != STT_GNU_IFUNC
7306 && (SYMBOL_CALLS_LOCAL (info, h)
7307 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7308 || ((struct ppc_link_hash_entry *) h)->save_res)
7309 {
7310 h->plt.plist = NULL;
7311 h->needs_plt = 0;
7312 h->pointer_equality_needed = 0;
7313 }
7314 else if (abiversion (info->output_bfd) >= 2)
7315 {
7316 /* Taking a function's address in a read/write section
7317 doesn't require us to define the function symbol in the
7318 executable on a global entry stub. A dynamic reloc can
7319 be used instead. The reason we prefer a few more dynamic
7320 relocs is that calling via a global entry stub costs a
7321 few more instructions, and pointer_equality_needed causes
7322 extra work in ld.so when resolving these symbols. */
7323 if (global_entry_stub (h)
7324 && !alias_readonly_dynrelocs (h))
7325 {
7326 h->pointer_equality_needed = 0;
7327 /* After adjust_dynamic_symbol, non_got_ref set in
7328 the non-pic case means that dyn_relocs for this
7329 symbol should be discarded. */
7330 h->non_got_ref = 0;
7331 }
7332
7333 /* If making a plt entry, then we don't need copy relocs. */
7334 return TRUE;
7335 }
7336 }
7337 else
7338 h->plt.plist = NULL;
7339
7340 /* If this is a weak symbol, and there is a real definition, the
7341 processor independent code will have arranged for us to see the
7342 real definition first, and we can just use the same value. */
7343 if (h->u.weakdef != NULL)
7344 {
7345 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7346 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7347 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7348 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7349 if (ELIMINATE_COPY_RELOCS)
7350 h->non_got_ref = h->u.weakdef->non_got_ref;
7351 return TRUE;
7352 }
7353
7354 /* If we are creating a shared library, we must presume that the
7355 only references to the symbol are via the global offset table.
7356 For such cases we need not do anything here; the relocations will
7357 be handled correctly by relocate_section. */
7358 if (bfd_link_pic (info))
7359 return TRUE;
7360
7361 /* If there are no references to this symbol that do not use the
7362 GOT, we don't need to generate a copy reloc. */
7363 if (!h->non_got_ref)
7364 return TRUE;
7365
7366 /* Don't generate a copy reloc for symbols defined in the executable. */
7367 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7368
7369 /* If -z nocopyreloc was given, don't generate them either. */
7370 || info->nocopyreloc
7371
7372 /* If we didn't find any dynamic relocs in read-only sections, then
7373 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7374 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7375
7376 /* Protected variables do not work with .dynbss. The copy in
7377 .dynbss won't be used by the shared library with the protected
7378 definition for the variable. Text relocations are preferable
7379 to an incorrect program. */
7380 || h->protected_def)
7381 {
7382 h->non_got_ref = 0;
7383 return TRUE;
7384 }
7385
7386 if (h->plt.plist != NULL)
7387 {
7388 /* We should never get here, but unfortunately there are versions
7389 of gcc out there that improperly (for this ABI) put initialized
7390 function pointers, vtable refs and suchlike in read-only
7391 sections. Allow them to proceed, but warn that this might
7392 break at runtime. */
7393 info->callbacks->einfo
7394 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7395 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7396 h->root.root.string);
7397 }
7398
7399 /* This is a reference to a symbol defined by a dynamic object which
7400 is not a function. */
7401
7402 /* We must allocate the symbol in our .dynbss section, which will
7403 become part of the .bss section of the executable. There will be
7404 an entry for this symbol in the .dynsym section. The dynamic
7405 object will contain position independent code, so all references
7406 from the dynamic object to this symbol will go through the global
7407 offset table. The dynamic linker will use the .dynsym entry to
7408 determine the address it must put in the global offset table, so
7409 both the dynamic object and the regular object will refer to the
7410 same memory location for the variable. */
7411
7412 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7413 to copy the initial value out of the dynamic object and into the
7414 runtime process image. We need to remember the offset into the
7415 .rela.bss section we are going to use. */
7416 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7417 {
7418 s = htab->elf.sdynrelro;
7419 srel = htab->elf.sreldynrelro;
7420 }
7421 else
7422 {
7423 s = htab->elf.sdynbss;
7424 srel = htab->elf.srelbss;
7425 }
7426 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7427 {
7428 srel->size += sizeof (Elf64_External_Rela);
7429 h->needs_copy = 1;
7430 }
7431
7432 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7433 }
7434
7435 /* If given a function descriptor symbol, hide both the function code
7436 sym and the descriptor. */
7437 static void
7438 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7439 struct elf_link_hash_entry *h,
7440 bfd_boolean force_local)
7441 {
7442 struct ppc_link_hash_entry *eh;
7443 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7444
7445 eh = (struct ppc_link_hash_entry *) h;
7446 if (eh->is_func_descriptor)
7447 {
7448 struct ppc_link_hash_entry *fh = eh->oh;
7449
7450 if (fh == NULL)
7451 {
7452 const char *p, *q;
7453 struct elf_link_hash_table *htab = elf_hash_table (info);
7454 char save;
7455
7456 /* We aren't supposed to use alloca in BFD because on
7457 systems which do not have alloca the version in libiberty
7458 calls xmalloc, which might cause the program to crash
7459 when it runs out of memory. This function doesn't have a
7460 return status, so there's no way to gracefully return an
7461 error. So cheat. We know that string[-1] can be safely
7462 accessed; It's either a string in an ELF string table,
7463 or allocated in an objalloc structure. */
7464
7465 p = eh->elf.root.root.string - 1;
7466 save = *p;
7467 *(char *) p = '.';
7468 fh = (struct ppc_link_hash_entry *)
7469 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7470 *(char *) p = save;
7471
7472 /* Unfortunately, if it so happens that the string we were
7473 looking for was allocated immediately before this string,
7474 then we overwrote the string terminator. That's the only
7475 reason the lookup should fail. */
7476 if (fh == NULL)
7477 {
7478 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7479 while (q >= eh->elf.root.root.string && *q == *p)
7480 --q, --p;
7481 if (q < eh->elf.root.root.string && *p == '.')
7482 fh = (struct ppc_link_hash_entry *)
7483 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7484 }
7485 if (fh != NULL)
7486 {
7487 eh->oh = fh;
7488 fh->oh = eh;
7489 }
7490 }
7491 if (fh != NULL)
7492 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7493 }
7494 }
7495
7496 static bfd_boolean
7497 get_sym_h (struct elf_link_hash_entry **hp,
7498 Elf_Internal_Sym **symp,
7499 asection **symsecp,
7500 unsigned char **tls_maskp,
7501 Elf_Internal_Sym **locsymsp,
7502 unsigned long r_symndx,
7503 bfd *ibfd)
7504 {
7505 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7506
7507 if (r_symndx >= symtab_hdr->sh_info)
7508 {
7509 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7510 struct elf_link_hash_entry *h;
7511
7512 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7513 h = elf_follow_link (h);
7514
7515 if (hp != NULL)
7516 *hp = h;
7517
7518 if (symp != NULL)
7519 *symp = NULL;
7520
7521 if (symsecp != NULL)
7522 {
7523 asection *symsec = NULL;
7524 if (h->root.type == bfd_link_hash_defined
7525 || h->root.type == bfd_link_hash_defweak)
7526 symsec = h->root.u.def.section;
7527 *symsecp = symsec;
7528 }
7529
7530 if (tls_maskp != NULL)
7531 {
7532 struct ppc_link_hash_entry *eh;
7533
7534 eh = (struct ppc_link_hash_entry *) h;
7535 *tls_maskp = &eh->tls_mask;
7536 }
7537 }
7538 else
7539 {
7540 Elf_Internal_Sym *sym;
7541 Elf_Internal_Sym *locsyms = *locsymsp;
7542
7543 if (locsyms == NULL)
7544 {
7545 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7546 if (locsyms == NULL)
7547 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7548 symtab_hdr->sh_info,
7549 0, NULL, NULL, NULL);
7550 if (locsyms == NULL)
7551 return FALSE;
7552 *locsymsp = locsyms;
7553 }
7554 sym = locsyms + r_symndx;
7555
7556 if (hp != NULL)
7557 *hp = NULL;
7558
7559 if (symp != NULL)
7560 *symp = sym;
7561
7562 if (symsecp != NULL)
7563 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7564
7565 if (tls_maskp != NULL)
7566 {
7567 struct got_entry **lgot_ents;
7568 unsigned char *tls_mask;
7569
7570 tls_mask = NULL;
7571 lgot_ents = elf_local_got_ents (ibfd);
7572 if (lgot_ents != NULL)
7573 {
7574 struct plt_entry **local_plt = (struct plt_entry **)
7575 (lgot_ents + symtab_hdr->sh_info);
7576 unsigned char *lgot_masks = (unsigned char *)
7577 (local_plt + symtab_hdr->sh_info);
7578 tls_mask = &lgot_masks[r_symndx];
7579 }
7580 *tls_maskp = tls_mask;
7581 }
7582 }
7583 return TRUE;
7584 }
7585
7586 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7587 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7588 type suitable for optimization, and 1 otherwise. */
7589
7590 static int
7591 get_tls_mask (unsigned char **tls_maskp,
7592 unsigned long *toc_symndx,
7593 bfd_vma *toc_addend,
7594 Elf_Internal_Sym **locsymsp,
7595 const Elf_Internal_Rela *rel,
7596 bfd *ibfd)
7597 {
7598 unsigned long r_symndx;
7599 int next_r;
7600 struct elf_link_hash_entry *h;
7601 Elf_Internal_Sym *sym;
7602 asection *sec;
7603 bfd_vma off;
7604
7605 r_symndx = ELF64_R_SYM (rel->r_info);
7606 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7607 return 0;
7608
7609 if ((*tls_maskp != NULL && **tls_maskp != 0)
7610 || sec == NULL
7611 || ppc64_elf_section_data (sec) == NULL
7612 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7613 return 1;
7614
7615 /* Look inside a TOC section too. */
7616 if (h != NULL)
7617 {
7618 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7619 off = h->root.u.def.value;
7620 }
7621 else
7622 off = sym->st_value;
7623 off += rel->r_addend;
7624 BFD_ASSERT (off % 8 == 0);
7625 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7626 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7627 if (toc_symndx != NULL)
7628 *toc_symndx = r_symndx;
7629 if (toc_addend != NULL)
7630 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7631 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7632 return 0;
7633 if ((h == NULL || is_static_defined (h))
7634 && (next_r == -1 || next_r == -2))
7635 return 1 - next_r;
7636 return 1;
7637 }
7638
7639 /* Find (or create) an entry in the tocsave hash table. */
7640
7641 static struct tocsave_entry *
7642 tocsave_find (struct ppc_link_hash_table *htab,
7643 enum insert_option insert,
7644 Elf_Internal_Sym **local_syms,
7645 const Elf_Internal_Rela *irela,
7646 bfd *ibfd)
7647 {
7648 unsigned long r_indx;
7649 struct elf_link_hash_entry *h;
7650 Elf_Internal_Sym *sym;
7651 struct tocsave_entry ent, *p;
7652 hashval_t hash;
7653 struct tocsave_entry **slot;
7654
7655 r_indx = ELF64_R_SYM (irela->r_info);
7656 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7657 return NULL;
7658 if (ent.sec == NULL || ent.sec->output_section == NULL)
7659 {
7660 _bfd_error_handler
7661 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7662 return NULL;
7663 }
7664
7665 if (h != NULL)
7666 ent.offset = h->root.u.def.value;
7667 else
7668 ent.offset = sym->st_value;
7669 ent.offset += irela->r_addend;
7670
7671 hash = tocsave_htab_hash (&ent);
7672 slot = ((struct tocsave_entry **)
7673 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7674 if (slot == NULL)
7675 return NULL;
7676
7677 if (*slot == NULL)
7678 {
7679 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7680 if (p == NULL)
7681 return NULL;
7682 *p = ent;
7683 *slot = p;
7684 }
7685 return *slot;
7686 }
7687
7688 /* Adjust all global syms defined in opd sections. In gcc generated
7689 code for the old ABI, these will already have been done. */
7690
7691 static bfd_boolean
7692 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7693 {
7694 struct ppc_link_hash_entry *eh;
7695 asection *sym_sec;
7696 struct _opd_sec_data *opd;
7697
7698 if (h->root.type == bfd_link_hash_indirect)
7699 return TRUE;
7700
7701 if (h->root.type != bfd_link_hash_defined
7702 && h->root.type != bfd_link_hash_defweak)
7703 return TRUE;
7704
7705 eh = (struct ppc_link_hash_entry *) h;
7706 if (eh->adjust_done)
7707 return TRUE;
7708
7709 sym_sec = eh->elf.root.u.def.section;
7710 opd = get_opd_info (sym_sec);
7711 if (opd != NULL && opd->adjust != NULL)
7712 {
7713 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7714 if (adjust == -1)
7715 {
7716 /* This entry has been deleted. */
7717 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7718 if (dsec == NULL)
7719 {
7720 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7721 if (discarded_section (dsec))
7722 {
7723 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7724 break;
7725 }
7726 }
7727 eh->elf.root.u.def.value = 0;
7728 eh->elf.root.u.def.section = dsec;
7729 }
7730 else
7731 eh->elf.root.u.def.value += adjust;
7732 eh->adjust_done = 1;
7733 }
7734 return TRUE;
7735 }
7736
7737 /* Handles decrementing dynamic reloc counts for the reloc specified by
7738 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7739 have already been determined. */
7740
7741 static bfd_boolean
7742 dec_dynrel_count (bfd_vma r_info,
7743 asection *sec,
7744 struct bfd_link_info *info,
7745 Elf_Internal_Sym **local_syms,
7746 struct elf_link_hash_entry *h,
7747 Elf_Internal_Sym *sym)
7748 {
7749 enum elf_ppc64_reloc_type r_type;
7750 asection *sym_sec = NULL;
7751
7752 /* Can this reloc be dynamic? This switch, and later tests here
7753 should be kept in sync with the code in check_relocs. */
7754 r_type = ELF64_R_TYPE (r_info);
7755 switch (r_type)
7756 {
7757 default:
7758 return TRUE;
7759
7760 case R_PPC64_TPREL16:
7761 case R_PPC64_TPREL16_LO:
7762 case R_PPC64_TPREL16_HI:
7763 case R_PPC64_TPREL16_HA:
7764 case R_PPC64_TPREL16_DS:
7765 case R_PPC64_TPREL16_LO_DS:
7766 case R_PPC64_TPREL16_HIGH:
7767 case R_PPC64_TPREL16_HIGHA:
7768 case R_PPC64_TPREL16_HIGHER:
7769 case R_PPC64_TPREL16_HIGHERA:
7770 case R_PPC64_TPREL16_HIGHEST:
7771 case R_PPC64_TPREL16_HIGHESTA:
7772 if (!bfd_link_pic (info))
7773 return TRUE;
7774
7775 case R_PPC64_TPREL64:
7776 case R_PPC64_DTPMOD64:
7777 case R_PPC64_DTPREL64:
7778 case R_PPC64_ADDR64:
7779 case R_PPC64_REL30:
7780 case R_PPC64_REL32:
7781 case R_PPC64_REL64:
7782 case R_PPC64_ADDR14:
7783 case R_PPC64_ADDR14_BRNTAKEN:
7784 case R_PPC64_ADDR14_BRTAKEN:
7785 case R_PPC64_ADDR16:
7786 case R_PPC64_ADDR16_DS:
7787 case R_PPC64_ADDR16_HA:
7788 case R_PPC64_ADDR16_HI:
7789 case R_PPC64_ADDR16_HIGH:
7790 case R_PPC64_ADDR16_HIGHA:
7791 case R_PPC64_ADDR16_HIGHER:
7792 case R_PPC64_ADDR16_HIGHERA:
7793 case R_PPC64_ADDR16_HIGHEST:
7794 case R_PPC64_ADDR16_HIGHESTA:
7795 case R_PPC64_ADDR16_LO:
7796 case R_PPC64_ADDR16_LO_DS:
7797 case R_PPC64_ADDR24:
7798 case R_PPC64_ADDR32:
7799 case R_PPC64_UADDR16:
7800 case R_PPC64_UADDR32:
7801 case R_PPC64_UADDR64:
7802 case R_PPC64_TOC:
7803 break;
7804 }
7805
7806 if (local_syms != NULL)
7807 {
7808 unsigned long r_symndx;
7809 bfd *ibfd = sec->owner;
7810
7811 r_symndx = ELF64_R_SYM (r_info);
7812 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7813 return FALSE;
7814 }
7815
7816 if ((bfd_link_pic (info)
7817 && (must_be_dyn_reloc (info, r_type)
7818 || (h != NULL
7819 && (!SYMBOLIC_BIND (info, h)
7820 || h->root.type == bfd_link_hash_defweak
7821 || !h->def_regular))))
7822 || (ELIMINATE_COPY_RELOCS
7823 && !bfd_link_pic (info)
7824 && h != NULL
7825 && (h->root.type == bfd_link_hash_defweak
7826 || !h->def_regular)))
7827 ;
7828 else
7829 return TRUE;
7830
7831 if (h != NULL)
7832 {
7833 struct elf_dyn_relocs *p;
7834 struct elf_dyn_relocs **pp;
7835 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7836
7837 /* elf_gc_sweep may have already removed all dyn relocs associated
7838 with local syms for a given section. Also, symbol flags are
7839 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7840 report a dynreloc miscount. */
7841 if (*pp == NULL && info->gc_sections)
7842 return TRUE;
7843
7844 while ((p = *pp) != NULL)
7845 {
7846 if (p->sec == sec)
7847 {
7848 if (!must_be_dyn_reloc (info, r_type))
7849 p->pc_count -= 1;
7850 p->count -= 1;
7851 if (p->count == 0)
7852 *pp = p->next;
7853 return TRUE;
7854 }
7855 pp = &p->next;
7856 }
7857 }
7858 else
7859 {
7860 struct ppc_dyn_relocs *p;
7861 struct ppc_dyn_relocs **pp;
7862 void *vpp;
7863 bfd_boolean is_ifunc;
7864
7865 if (local_syms == NULL)
7866 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7867 if (sym_sec == NULL)
7868 sym_sec = sec;
7869
7870 vpp = &elf_section_data (sym_sec)->local_dynrel;
7871 pp = (struct ppc_dyn_relocs **) vpp;
7872
7873 if (*pp == NULL && info->gc_sections)
7874 return TRUE;
7875
7876 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7877 while ((p = *pp) != NULL)
7878 {
7879 if (p->sec == sec && p->ifunc == is_ifunc)
7880 {
7881 p->count -= 1;
7882 if (p->count == 0)
7883 *pp = p->next;
7884 return TRUE;
7885 }
7886 pp = &p->next;
7887 }
7888 }
7889
7890 /* xgettext:c-format */
7891 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7892 sec->owner, sec);
7893 bfd_set_error (bfd_error_bad_value);
7894 return FALSE;
7895 }
7896
7897 /* Remove unused Official Procedure Descriptor entries. Currently we
7898 only remove those associated with functions in discarded link-once
7899 sections, or weakly defined functions that have been overridden. It
7900 would be possible to remove many more entries for statically linked
7901 applications. */
7902
7903 bfd_boolean
7904 ppc64_elf_edit_opd (struct bfd_link_info *info)
7905 {
7906 bfd *ibfd;
7907 bfd_boolean some_edited = FALSE;
7908 asection *need_pad = NULL;
7909 struct ppc_link_hash_table *htab;
7910
7911 htab = ppc_hash_table (info);
7912 if (htab == NULL)
7913 return FALSE;
7914
7915 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7916 {
7917 asection *sec;
7918 Elf_Internal_Rela *relstart, *rel, *relend;
7919 Elf_Internal_Shdr *symtab_hdr;
7920 Elf_Internal_Sym *local_syms;
7921 struct _opd_sec_data *opd;
7922 bfd_boolean need_edit, add_aux_fields, broken;
7923 bfd_size_type cnt_16b = 0;
7924
7925 if (!is_ppc64_elf (ibfd))
7926 continue;
7927
7928 sec = bfd_get_section_by_name (ibfd, ".opd");
7929 if (sec == NULL || sec->size == 0)
7930 continue;
7931
7932 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7933 continue;
7934
7935 if (sec->output_section == bfd_abs_section_ptr)
7936 continue;
7937
7938 /* Look through the section relocs. */
7939 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7940 continue;
7941
7942 local_syms = NULL;
7943 symtab_hdr = &elf_symtab_hdr (ibfd);
7944
7945 /* Read the relocations. */
7946 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7947 info->keep_memory);
7948 if (relstart == NULL)
7949 return FALSE;
7950
7951 /* First run through the relocs to check they are sane, and to
7952 determine whether we need to edit this opd section. */
7953 need_edit = FALSE;
7954 broken = FALSE;
7955 need_pad = sec;
7956 relend = relstart + sec->reloc_count;
7957 for (rel = relstart; rel < relend; )
7958 {
7959 enum elf_ppc64_reloc_type r_type;
7960 unsigned long r_symndx;
7961 asection *sym_sec;
7962 struct elf_link_hash_entry *h;
7963 Elf_Internal_Sym *sym;
7964 bfd_vma offset;
7965
7966 /* .opd contains an array of 16 or 24 byte entries. We're
7967 only interested in the reloc pointing to a function entry
7968 point. */
7969 offset = rel->r_offset;
7970 if (rel + 1 == relend
7971 || rel[1].r_offset != offset + 8)
7972 {
7973 /* If someone messes with .opd alignment then after a
7974 "ld -r" we might have padding in the middle of .opd.
7975 Also, there's nothing to prevent someone putting
7976 something silly in .opd with the assembler. No .opd
7977 optimization for them! */
7978 broken_opd:
7979 _bfd_error_handler
7980 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7981 broken = TRUE;
7982 break;
7983 }
7984
7985 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7986 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7987 {
7988 _bfd_error_handler
7989 /* xgettext:c-format */
7990 (_("%B: unexpected reloc type %u in .opd section"),
7991 ibfd, r_type);
7992 broken = TRUE;
7993 break;
7994 }
7995
7996 r_symndx = ELF64_R_SYM (rel->r_info);
7997 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7998 r_symndx, ibfd))
7999 goto error_ret;
8000
8001 if (sym_sec == NULL || sym_sec->owner == NULL)
8002 {
8003 const char *sym_name;
8004 if (h != NULL)
8005 sym_name = h->root.root.string;
8006 else
8007 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8008 sym_sec);
8009
8010 _bfd_error_handler
8011 /* xgettext:c-format */
8012 (_("%B: undefined sym `%s' in .opd section"),
8013 ibfd, sym_name);
8014 broken = TRUE;
8015 break;
8016 }
8017
8018 /* opd entries are always for functions defined in the
8019 current input bfd. If the symbol isn't defined in the
8020 input bfd, then we won't be using the function in this
8021 bfd; It must be defined in a linkonce section in another
8022 bfd, or is weak. It's also possible that we are
8023 discarding the function due to a linker script /DISCARD/,
8024 which we test for via the output_section. */
8025 if (sym_sec->owner != ibfd
8026 || sym_sec->output_section == bfd_abs_section_ptr)
8027 need_edit = TRUE;
8028
8029 rel += 2;
8030 if (rel + 1 == relend
8031 || (rel + 2 < relend
8032 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8033 ++rel;
8034
8035 if (rel == relend)
8036 {
8037 if (sec->size == offset + 24)
8038 {
8039 need_pad = NULL;
8040 break;
8041 }
8042 if (sec->size == offset + 16)
8043 {
8044 cnt_16b++;
8045 break;
8046 }
8047 goto broken_opd;
8048 }
8049 else if (rel + 1 < relend
8050 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8051 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8052 {
8053 if (rel[0].r_offset == offset + 16)
8054 cnt_16b++;
8055 else if (rel[0].r_offset != offset + 24)
8056 goto broken_opd;
8057 }
8058 else
8059 goto broken_opd;
8060 }
8061
8062 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8063
8064 if (!broken && (need_edit || add_aux_fields))
8065 {
8066 Elf_Internal_Rela *write_rel;
8067 Elf_Internal_Shdr *rel_hdr;
8068 bfd_byte *rptr, *wptr;
8069 bfd_byte *new_contents;
8070 bfd_size_type amt;
8071
8072 new_contents = NULL;
8073 amt = OPD_NDX (sec->size) * sizeof (long);
8074 opd = &ppc64_elf_section_data (sec)->u.opd;
8075 opd->adjust = bfd_zalloc (sec->owner, amt);
8076 if (opd->adjust == NULL)
8077 return FALSE;
8078 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8079
8080 /* This seems a waste of time as input .opd sections are all
8081 zeros as generated by gcc, but I suppose there's no reason
8082 this will always be so. We might start putting something in
8083 the third word of .opd entries. */
8084 if ((sec->flags & SEC_IN_MEMORY) == 0)
8085 {
8086 bfd_byte *loc;
8087 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8088 {
8089 if (loc != NULL)
8090 free (loc);
8091 error_ret:
8092 if (local_syms != NULL
8093 && symtab_hdr->contents != (unsigned char *) local_syms)
8094 free (local_syms);
8095 if (elf_section_data (sec)->relocs != relstart)
8096 free (relstart);
8097 return FALSE;
8098 }
8099 sec->contents = loc;
8100 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8101 }
8102
8103 elf_section_data (sec)->relocs = relstart;
8104
8105 new_contents = sec->contents;
8106 if (add_aux_fields)
8107 {
8108 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8109 if (new_contents == NULL)
8110 return FALSE;
8111 need_pad = NULL;
8112 }
8113 wptr = new_contents;
8114 rptr = sec->contents;
8115 write_rel = relstart;
8116 for (rel = relstart; rel < relend; )
8117 {
8118 unsigned long r_symndx;
8119 asection *sym_sec;
8120 struct elf_link_hash_entry *h;
8121 struct ppc_link_hash_entry *fdh = NULL;
8122 Elf_Internal_Sym *sym;
8123 long opd_ent_size;
8124 Elf_Internal_Rela *next_rel;
8125 bfd_boolean skip;
8126
8127 r_symndx = ELF64_R_SYM (rel->r_info);
8128 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8129 r_symndx, ibfd))
8130 goto error_ret;
8131
8132 next_rel = rel + 2;
8133 if (next_rel + 1 == relend
8134 || (next_rel + 2 < relend
8135 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8136 ++next_rel;
8137
8138 /* See if the .opd entry is full 24 byte or
8139 16 byte (with fd_aux entry overlapped with next
8140 fd_func). */
8141 opd_ent_size = 24;
8142 if (next_rel == relend)
8143 {
8144 if (sec->size == rel->r_offset + 16)
8145 opd_ent_size = 16;
8146 }
8147 else if (next_rel->r_offset == rel->r_offset + 16)
8148 opd_ent_size = 16;
8149
8150 if (h != NULL
8151 && h->root.root.string[0] == '.')
8152 {
8153 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8154 if (fdh != NULL)
8155 {
8156 fdh = ppc_follow_link (fdh);
8157 if (fdh->elf.root.type != bfd_link_hash_defined
8158 && fdh->elf.root.type != bfd_link_hash_defweak)
8159 fdh = NULL;
8160 }
8161 }
8162
8163 skip = (sym_sec->owner != ibfd
8164 || sym_sec->output_section == bfd_abs_section_ptr);
8165 if (skip)
8166 {
8167 if (fdh != NULL && sym_sec->owner == ibfd)
8168 {
8169 /* Arrange for the function descriptor sym
8170 to be dropped. */
8171 fdh->elf.root.u.def.value = 0;
8172 fdh->elf.root.u.def.section = sym_sec;
8173 }
8174 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8175
8176 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8177 rel = next_rel;
8178 else
8179 while (1)
8180 {
8181 if (!dec_dynrel_count (rel->r_info, sec, info,
8182 NULL, h, sym))
8183 goto error_ret;
8184
8185 if (++rel == next_rel)
8186 break;
8187
8188 r_symndx = ELF64_R_SYM (rel->r_info);
8189 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8190 r_symndx, ibfd))
8191 goto error_ret;
8192 }
8193 }
8194 else
8195 {
8196 /* We'll be keeping this opd entry. */
8197 long adjust;
8198
8199 if (fdh != NULL)
8200 {
8201 /* Redefine the function descriptor symbol to
8202 this location in the opd section. It is
8203 necessary to update the value here rather
8204 than using an array of adjustments as we do
8205 for local symbols, because various places
8206 in the generic ELF code use the value
8207 stored in u.def.value. */
8208 fdh->elf.root.u.def.value = wptr - new_contents;
8209 fdh->adjust_done = 1;
8210 }
8211
8212 /* Local syms are a bit tricky. We could
8213 tweak them as they can be cached, but
8214 we'd need to look through the local syms
8215 for the function descriptor sym which we
8216 don't have at the moment. So keep an
8217 array of adjustments. */
8218 adjust = (wptr - new_contents) - (rptr - sec->contents);
8219 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8220
8221 if (wptr != rptr)
8222 memcpy (wptr, rptr, opd_ent_size);
8223 wptr += opd_ent_size;
8224 if (add_aux_fields && opd_ent_size == 16)
8225 {
8226 memset (wptr, '\0', 8);
8227 wptr += 8;
8228 }
8229
8230 /* We need to adjust any reloc offsets to point to the
8231 new opd entries. */
8232 for ( ; rel != next_rel; ++rel)
8233 {
8234 rel->r_offset += adjust;
8235 if (write_rel != rel)
8236 memcpy (write_rel, rel, sizeof (*rel));
8237 ++write_rel;
8238 }
8239 }
8240
8241 rptr += opd_ent_size;
8242 }
8243
8244 sec->size = wptr - new_contents;
8245 sec->reloc_count = write_rel - relstart;
8246 if (add_aux_fields)
8247 {
8248 free (sec->contents);
8249 sec->contents = new_contents;
8250 }
8251
8252 /* Fudge the header size too, as this is used later in
8253 elf_bfd_final_link if we are emitting relocs. */
8254 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8255 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8256 some_edited = TRUE;
8257 }
8258 else if (elf_section_data (sec)->relocs != relstart)
8259 free (relstart);
8260
8261 if (local_syms != NULL
8262 && symtab_hdr->contents != (unsigned char *) local_syms)
8263 {
8264 if (!info->keep_memory)
8265 free (local_syms);
8266 else
8267 symtab_hdr->contents = (unsigned char *) local_syms;
8268 }
8269 }
8270
8271 if (some_edited)
8272 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8273
8274 /* If we are doing a final link and the last .opd entry is just 16 byte
8275 long, add a 8 byte padding after it. */
8276 if (need_pad != NULL && !bfd_link_relocatable (info))
8277 {
8278 bfd_byte *p;
8279
8280 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8281 {
8282 BFD_ASSERT (need_pad->size > 0);
8283
8284 p = bfd_malloc (need_pad->size + 8);
8285 if (p == NULL)
8286 return FALSE;
8287
8288 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8289 p, 0, need_pad->size))
8290 return FALSE;
8291
8292 need_pad->contents = p;
8293 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8294 }
8295 else
8296 {
8297 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8298 if (p == NULL)
8299 return FALSE;
8300
8301 need_pad->contents = p;
8302 }
8303
8304 memset (need_pad->contents + need_pad->size, 0, 8);
8305 need_pad->size += 8;
8306 }
8307
8308 return TRUE;
8309 }
8310
8311 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8312
8313 asection *
8314 ppc64_elf_tls_setup (struct bfd_link_info *info)
8315 {
8316 struct ppc_link_hash_table *htab;
8317
8318 htab = ppc_hash_table (info);
8319 if (htab == NULL)
8320 return NULL;
8321
8322 if (abiversion (info->output_bfd) == 1)
8323 htab->opd_abi = 1;
8324
8325 if (htab->params->no_multi_toc)
8326 htab->do_multi_toc = 0;
8327 else if (!htab->do_multi_toc)
8328 htab->params->no_multi_toc = 1;
8329
8330 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8331 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8332 FALSE, FALSE, TRUE));
8333 /* Move dynamic linking info to the function descriptor sym. */
8334 if (htab->tls_get_addr != NULL)
8335 func_desc_adjust (&htab->tls_get_addr->elf, info);
8336 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8337 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8338 FALSE, FALSE, TRUE));
8339 if (htab->params->tls_get_addr_opt)
8340 {
8341 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8342
8343 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8344 FALSE, FALSE, TRUE);
8345 if (opt != NULL)
8346 func_desc_adjust (opt, info);
8347 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8348 FALSE, FALSE, TRUE);
8349 if (opt_fd != NULL
8350 && (opt_fd->root.type == bfd_link_hash_defined
8351 || opt_fd->root.type == bfd_link_hash_defweak))
8352 {
8353 /* If glibc supports an optimized __tls_get_addr call stub,
8354 signalled by the presence of __tls_get_addr_opt, and we'll
8355 be calling __tls_get_addr via a plt call stub, then
8356 make __tls_get_addr point to __tls_get_addr_opt. */
8357 tga_fd = &htab->tls_get_addr_fd->elf;
8358 if (htab->elf.dynamic_sections_created
8359 && tga_fd != NULL
8360 && (tga_fd->type == STT_FUNC
8361 || tga_fd->needs_plt)
8362 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8363 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8364 {
8365 struct plt_entry *ent;
8366
8367 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8368 if (ent->plt.refcount > 0)
8369 break;
8370 if (ent != NULL)
8371 {
8372 tga_fd->root.type = bfd_link_hash_indirect;
8373 tga_fd->root.u.i.link = &opt_fd->root;
8374 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8375 opt_fd->mark = 1;
8376 if (opt_fd->dynindx != -1)
8377 {
8378 /* Use __tls_get_addr_opt in dynamic relocations. */
8379 opt_fd->dynindx = -1;
8380 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8381 opt_fd->dynstr_index);
8382 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8383 return NULL;
8384 }
8385 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8386 tga = &htab->tls_get_addr->elf;
8387 if (opt != NULL && tga != NULL)
8388 {
8389 tga->root.type = bfd_link_hash_indirect;
8390 tga->root.u.i.link = &opt->root;
8391 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8392 opt->mark = 1;
8393 _bfd_elf_link_hash_hide_symbol (info, opt,
8394 tga->forced_local);
8395 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8396 }
8397 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8398 htab->tls_get_addr_fd->is_func_descriptor = 1;
8399 if (htab->tls_get_addr != NULL)
8400 {
8401 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8402 htab->tls_get_addr->is_func = 1;
8403 }
8404 }
8405 }
8406 }
8407 else if (htab->params->tls_get_addr_opt < 0)
8408 htab->params->tls_get_addr_opt = 0;
8409 }
8410 return _bfd_elf_tls_setup (info->output_bfd, info);
8411 }
8412
8413 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8414 HASH1 or HASH2. */
8415
8416 static bfd_boolean
8417 branch_reloc_hash_match (const bfd *ibfd,
8418 const Elf_Internal_Rela *rel,
8419 const struct ppc_link_hash_entry *hash1,
8420 const struct ppc_link_hash_entry *hash2)
8421 {
8422 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8423 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8424 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8425
8426 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8427 {
8428 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8429 struct elf_link_hash_entry *h;
8430
8431 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8432 h = elf_follow_link (h);
8433 if (h == &hash1->elf || h == &hash2->elf)
8434 return TRUE;
8435 }
8436 return FALSE;
8437 }
8438
8439 /* Run through all the TLS relocs looking for optimization
8440 opportunities. The linker has been hacked (see ppc64elf.em) to do
8441 a preliminary section layout so that we know the TLS segment
8442 offsets. We can't optimize earlier because some optimizations need
8443 to know the tp offset, and we need to optimize before allocating
8444 dynamic relocations. */
8445
8446 bfd_boolean
8447 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8448 {
8449 bfd *ibfd;
8450 asection *sec;
8451 struct ppc_link_hash_table *htab;
8452 unsigned char *toc_ref;
8453 int pass;
8454
8455 if (!bfd_link_executable (info))
8456 return TRUE;
8457
8458 htab = ppc_hash_table (info);
8459 if (htab == NULL)
8460 return FALSE;
8461
8462 /* Make two passes over the relocs. On the first pass, mark toc
8463 entries involved with tls relocs, and check that tls relocs
8464 involved in setting up a tls_get_addr call are indeed followed by
8465 such a call. If they are not, we can't do any tls optimization.
8466 On the second pass twiddle tls_mask flags to notify
8467 relocate_section that optimization can be done, and adjust got
8468 and plt refcounts. */
8469 toc_ref = NULL;
8470 for (pass = 0; pass < 2; ++pass)
8471 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8472 {
8473 Elf_Internal_Sym *locsyms = NULL;
8474 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8475
8476 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8477 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8478 {
8479 Elf_Internal_Rela *relstart, *rel, *relend;
8480 bfd_boolean found_tls_get_addr_arg = 0;
8481
8482 /* Read the relocations. */
8483 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8484 info->keep_memory);
8485 if (relstart == NULL)
8486 {
8487 free (toc_ref);
8488 return FALSE;
8489 }
8490
8491 relend = relstart + sec->reloc_count;
8492 for (rel = relstart; rel < relend; rel++)
8493 {
8494 enum elf_ppc64_reloc_type r_type;
8495 unsigned long r_symndx;
8496 struct elf_link_hash_entry *h;
8497 Elf_Internal_Sym *sym;
8498 asection *sym_sec;
8499 unsigned char *tls_mask;
8500 unsigned char tls_set, tls_clear, tls_type = 0;
8501 bfd_vma value;
8502 bfd_boolean ok_tprel, is_local;
8503 long toc_ref_index = 0;
8504 int expecting_tls_get_addr = 0;
8505 bfd_boolean ret = FALSE;
8506
8507 r_symndx = ELF64_R_SYM (rel->r_info);
8508 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8509 r_symndx, ibfd))
8510 {
8511 err_free_rel:
8512 if (elf_section_data (sec)->relocs != relstart)
8513 free (relstart);
8514 if (toc_ref != NULL)
8515 free (toc_ref);
8516 if (locsyms != NULL
8517 && (elf_symtab_hdr (ibfd).contents
8518 != (unsigned char *) locsyms))
8519 free (locsyms);
8520 return ret;
8521 }
8522
8523 if (h != NULL)
8524 {
8525 if (h->root.type == bfd_link_hash_defined
8526 || h->root.type == bfd_link_hash_defweak)
8527 value = h->root.u.def.value;
8528 else if (h->root.type == bfd_link_hash_undefweak)
8529 value = 0;
8530 else
8531 {
8532 found_tls_get_addr_arg = 0;
8533 continue;
8534 }
8535 }
8536 else
8537 /* Symbols referenced by TLS relocs must be of type
8538 STT_TLS. So no need for .opd local sym adjust. */
8539 value = sym->st_value;
8540
8541 ok_tprel = FALSE;
8542 is_local = FALSE;
8543 if (h == NULL
8544 || !h->def_dynamic)
8545 {
8546 is_local = TRUE;
8547 if (h != NULL
8548 && h->root.type == bfd_link_hash_undefweak)
8549 ok_tprel = TRUE;
8550 else if (sym_sec != NULL
8551 && sym_sec->output_section != NULL)
8552 {
8553 value += sym_sec->output_offset;
8554 value += sym_sec->output_section->vma;
8555 value -= htab->elf.tls_sec->vma;
8556 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8557 < (bfd_vma) 1 << 32);
8558 }
8559 }
8560
8561 r_type = ELF64_R_TYPE (rel->r_info);
8562 /* If this section has old-style __tls_get_addr calls
8563 without marker relocs, then check that each
8564 __tls_get_addr call reloc is preceded by a reloc
8565 that conceivably belongs to the __tls_get_addr arg
8566 setup insn. If we don't find matching arg setup
8567 relocs, don't do any tls optimization. */
8568 if (pass == 0
8569 && sec->has_tls_get_addr_call
8570 && h != NULL
8571 && (h == &htab->tls_get_addr->elf
8572 || h == &htab->tls_get_addr_fd->elf)
8573 && !found_tls_get_addr_arg
8574 && is_branch_reloc (r_type))
8575 {
8576 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8577 "TLS optimization disabled\n"),
8578 ibfd, sec, rel->r_offset);
8579 ret = TRUE;
8580 goto err_free_rel;
8581 }
8582
8583 found_tls_get_addr_arg = 0;
8584 switch (r_type)
8585 {
8586 case R_PPC64_GOT_TLSLD16:
8587 case R_PPC64_GOT_TLSLD16_LO:
8588 expecting_tls_get_addr = 1;
8589 found_tls_get_addr_arg = 1;
8590 /* Fall through. */
8591
8592 case R_PPC64_GOT_TLSLD16_HI:
8593 case R_PPC64_GOT_TLSLD16_HA:
8594 /* These relocs should never be against a symbol
8595 defined in a shared lib. Leave them alone if
8596 that turns out to be the case. */
8597 if (!is_local)
8598 continue;
8599
8600 /* LD -> LE */
8601 tls_set = 0;
8602 tls_clear = TLS_LD;
8603 tls_type = TLS_TLS | TLS_LD;
8604 break;
8605
8606 case R_PPC64_GOT_TLSGD16:
8607 case R_PPC64_GOT_TLSGD16_LO:
8608 expecting_tls_get_addr = 1;
8609 found_tls_get_addr_arg = 1;
8610 /* Fall through. */
8611
8612 case R_PPC64_GOT_TLSGD16_HI:
8613 case R_PPC64_GOT_TLSGD16_HA:
8614 if (ok_tprel)
8615 /* GD -> LE */
8616 tls_set = 0;
8617 else
8618 /* GD -> IE */
8619 tls_set = TLS_TLS | TLS_TPRELGD;
8620 tls_clear = TLS_GD;
8621 tls_type = TLS_TLS | TLS_GD;
8622 break;
8623
8624 case R_PPC64_GOT_TPREL16_DS:
8625 case R_PPC64_GOT_TPREL16_LO_DS:
8626 case R_PPC64_GOT_TPREL16_HI:
8627 case R_PPC64_GOT_TPREL16_HA:
8628 if (ok_tprel)
8629 {
8630 /* IE -> LE */
8631 tls_set = 0;
8632 tls_clear = TLS_TPREL;
8633 tls_type = TLS_TLS | TLS_TPREL;
8634 break;
8635 }
8636 continue;
8637
8638 case R_PPC64_TLSGD:
8639 case R_PPC64_TLSLD:
8640 found_tls_get_addr_arg = 1;
8641 /* Fall through. */
8642
8643 case R_PPC64_TLS:
8644 case R_PPC64_TOC16:
8645 case R_PPC64_TOC16_LO:
8646 if (sym_sec == NULL || sym_sec != toc)
8647 continue;
8648
8649 /* Mark this toc entry as referenced by a TLS
8650 code sequence. We can do that now in the
8651 case of R_PPC64_TLS, and after checking for
8652 tls_get_addr for the TOC16 relocs. */
8653 if (toc_ref == NULL)
8654 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8655 if (toc_ref == NULL)
8656 goto err_free_rel;
8657
8658 if (h != NULL)
8659 value = h->root.u.def.value;
8660 else
8661 value = sym->st_value;
8662 value += rel->r_addend;
8663 if (value % 8 != 0)
8664 continue;
8665 BFD_ASSERT (value < toc->size
8666 && toc->output_offset % 8 == 0);
8667 toc_ref_index = (value + toc->output_offset) / 8;
8668 if (r_type == R_PPC64_TLS
8669 || r_type == R_PPC64_TLSGD
8670 || r_type == R_PPC64_TLSLD)
8671 {
8672 toc_ref[toc_ref_index] = 1;
8673 continue;
8674 }
8675
8676 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8677 continue;
8678
8679 tls_set = 0;
8680 tls_clear = 0;
8681 expecting_tls_get_addr = 2;
8682 break;
8683
8684 case R_PPC64_TPREL64:
8685 if (pass == 0
8686 || sec != toc
8687 || toc_ref == NULL
8688 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8689 continue;
8690 if (ok_tprel)
8691 {
8692 /* IE -> LE */
8693 tls_set = TLS_EXPLICIT;
8694 tls_clear = TLS_TPREL;
8695 break;
8696 }
8697 continue;
8698
8699 case R_PPC64_DTPMOD64:
8700 if (pass == 0
8701 || sec != toc
8702 || toc_ref == NULL
8703 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8704 continue;
8705 if (rel + 1 < relend
8706 && (rel[1].r_info
8707 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8708 && rel[1].r_offset == rel->r_offset + 8)
8709 {
8710 if (ok_tprel)
8711 /* GD -> LE */
8712 tls_set = TLS_EXPLICIT | TLS_GD;
8713 else
8714 /* GD -> IE */
8715 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8716 tls_clear = TLS_GD;
8717 }
8718 else
8719 {
8720 if (!is_local)
8721 continue;
8722
8723 /* LD -> LE */
8724 tls_set = TLS_EXPLICIT;
8725 tls_clear = TLS_LD;
8726 }
8727 break;
8728
8729 default:
8730 continue;
8731 }
8732
8733 if (pass == 0)
8734 {
8735 if (!expecting_tls_get_addr
8736 || !sec->has_tls_get_addr_call)
8737 continue;
8738
8739 if (rel + 1 < relend
8740 && branch_reloc_hash_match (ibfd, rel + 1,
8741 htab->tls_get_addr,
8742 htab->tls_get_addr_fd))
8743 {
8744 if (expecting_tls_get_addr == 2)
8745 {
8746 /* Check for toc tls entries. */
8747 unsigned char *toc_tls;
8748 int retval;
8749
8750 retval = get_tls_mask (&toc_tls, NULL, NULL,
8751 &locsyms,
8752 rel, ibfd);
8753 if (retval == 0)
8754 goto err_free_rel;
8755 if (toc_tls != NULL)
8756 {
8757 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8758 found_tls_get_addr_arg = 1;
8759 if (retval > 1)
8760 toc_ref[toc_ref_index] = 1;
8761 }
8762 }
8763 continue;
8764 }
8765
8766 if (expecting_tls_get_addr != 1)
8767 continue;
8768
8769 /* Uh oh, we didn't find the expected call. We
8770 could just mark this symbol to exclude it
8771 from tls optimization but it's safer to skip
8772 the entire optimization. */
8773 /* xgettext:c-format */
8774 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8775 "TLS optimization disabled\n"),
8776 ibfd, sec, rel->r_offset);
8777 ret = TRUE;
8778 goto err_free_rel;
8779 }
8780
8781 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8782 {
8783 struct plt_entry *ent;
8784 for (ent = htab->tls_get_addr->elf.plt.plist;
8785 ent != NULL;
8786 ent = ent->next)
8787 if (ent->addend == 0)
8788 {
8789 if (ent->plt.refcount > 0)
8790 {
8791 ent->plt.refcount -= 1;
8792 expecting_tls_get_addr = 0;
8793 }
8794 break;
8795 }
8796 }
8797
8798 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8799 {
8800 struct plt_entry *ent;
8801 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8802 ent != NULL;
8803 ent = ent->next)
8804 if (ent->addend == 0)
8805 {
8806 if (ent->plt.refcount > 0)
8807 ent->plt.refcount -= 1;
8808 break;
8809 }
8810 }
8811
8812 if (tls_clear == 0)
8813 continue;
8814
8815 if ((tls_set & TLS_EXPLICIT) == 0)
8816 {
8817 struct got_entry *ent;
8818
8819 /* Adjust got entry for this reloc. */
8820 if (h != NULL)
8821 ent = h->got.glist;
8822 else
8823 ent = elf_local_got_ents (ibfd)[r_symndx];
8824
8825 for (; ent != NULL; ent = ent->next)
8826 if (ent->addend == rel->r_addend
8827 && ent->owner == ibfd
8828 && ent->tls_type == tls_type)
8829 break;
8830 if (ent == NULL)
8831 abort ();
8832
8833 if (tls_set == 0)
8834 {
8835 /* We managed to get rid of a got entry. */
8836 if (ent->got.refcount > 0)
8837 ent->got.refcount -= 1;
8838 }
8839 }
8840 else
8841 {
8842 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8843 we'll lose one or two dyn relocs. */
8844 if (!dec_dynrel_count (rel->r_info, sec, info,
8845 NULL, h, sym))
8846 return FALSE;
8847
8848 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8849 {
8850 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8851 NULL, h, sym))
8852 return FALSE;
8853 }
8854 }
8855
8856 *tls_mask |= tls_set;
8857 *tls_mask &= ~tls_clear;
8858 }
8859
8860 if (elf_section_data (sec)->relocs != relstart)
8861 free (relstart);
8862 }
8863
8864 if (locsyms != NULL
8865 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8866 {
8867 if (!info->keep_memory)
8868 free (locsyms);
8869 else
8870 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8871 }
8872 }
8873
8874 if (toc_ref != NULL)
8875 free (toc_ref);
8876 return TRUE;
8877 }
8878
8879 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8880 the values of any global symbols in a toc section that has been
8881 edited. Globals in toc sections should be a rarity, so this function
8882 sets a flag if any are found in toc sections other than the one just
8883 edited, so that futher hash table traversals can be avoided. */
8884
8885 struct adjust_toc_info
8886 {
8887 asection *toc;
8888 unsigned long *skip;
8889 bfd_boolean global_toc_syms;
8890 };
8891
8892 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8893
8894 static bfd_boolean
8895 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8896 {
8897 struct ppc_link_hash_entry *eh;
8898 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8899 unsigned long i;
8900
8901 if (h->root.type != bfd_link_hash_defined
8902 && h->root.type != bfd_link_hash_defweak)
8903 return TRUE;
8904
8905 eh = (struct ppc_link_hash_entry *) h;
8906 if (eh->adjust_done)
8907 return TRUE;
8908
8909 if (eh->elf.root.u.def.section == toc_inf->toc)
8910 {
8911 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8912 i = toc_inf->toc->rawsize >> 3;
8913 else
8914 i = eh->elf.root.u.def.value >> 3;
8915
8916 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8917 {
8918 _bfd_error_handler
8919 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8920 do
8921 ++i;
8922 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8923 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8924 }
8925
8926 eh->elf.root.u.def.value -= toc_inf->skip[i];
8927 eh->adjust_done = 1;
8928 }
8929 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8930 toc_inf->global_toc_syms = TRUE;
8931
8932 return TRUE;
8933 }
8934
8935 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8936 on a _LO variety toc/got reloc. */
8937
8938 static bfd_boolean
8939 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8940 {
8941 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8942 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8943 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8944 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8945 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8946 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8947 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8948 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8949 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8950 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8951 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8952 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8953 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8954 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8955 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8956 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8957 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8958 /* Exclude lfqu by testing reloc. If relocs are ever
8959 defined for the reduced D field in psq_lu then those
8960 will need testing too. */
8961 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8962 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8963 && (insn & 1) == 0)
8964 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8965 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8966 /* Exclude stfqu. psq_stu as above for psq_lu. */
8967 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8968 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8969 && (insn & 1) == 0));
8970 }
8971
8972 /* Examine all relocs referencing .toc sections in order to remove
8973 unused .toc entries. */
8974
8975 bfd_boolean
8976 ppc64_elf_edit_toc (struct bfd_link_info *info)
8977 {
8978 bfd *ibfd;
8979 struct adjust_toc_info toc_inf;
8980 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8981
8982 htab->do_toc_opt = 1;
8983 toc_inf.global_toc_syms = TRUE;
8984 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8985 {
8986 asection *toc, *sec;
8987 Elf_Internal_Shdr *symtab_hdr;
8988 Elf_Internal_Sym *local_syms;
8989 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8990 unsigned long *skip, *drop;
8991 unsigned char *used;
8992 unsigned char *keep, last, some_unused;
8993
8994 if (!is_ppc64_elf (ibfd))
8995 continue;
8996
8997 toc = bfd_get_section_by_name (ibfd, ".toc");
8998 if (toc == NULL
8999 || toc->size == 0
9000 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
9001 || discarded_section (toc))
9002 continue;
9003
9004 toc_relocs = NULL;
9005 local_syms = NULL;
9006 symtab_hdr = &elf_symtab_hdr (ibfd);
9007
9008 /* Look at sections dropped from the final link. */
9009 skip = NULL;
9010 relstart = NULL;
9011 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9012 {
9013 if (sec->reloc_count == 0
9014 || !discarded_section (sec)
9015 || get_opd_info (sec)
9016 || (sec->flags & SEC_ALLOC) == 0
9017 || (sec->flags & SEC_DEBUGGING) != 0)
9018 continue;
9019
9020 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9021 if (relstart == NULL)
9022 goto error_ret;
9023
9024 /* Run through the relocs to see which toc entries might be
9025 unused. */
9026 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9027 {
9028 enum elf_ppc64_reloc_type r_type;
9029 unsigned long r_symndx;
9030 asection *sym_sec;
9031 struct elf_link_hash_entry *h;
9032 Elf_Internal_Sym *sym;
9033 bfd_vma val;
9034
9035 r_type = ELF64_R_TYPE (rel->r_info);
9036 switch (r_type)
9037 {
9038 default:
9039 continue;
9040
9041 case R_PPC64_TOC16:
9042 case R_PPC64_TOC16_LO:
9043 case R_PPC64_TOC16_HI:
9044 case R_PPC64_TOC16_HA:
9045 case R_PPC64_TOC16_DS:
9046 case R_PPC64_TOC16_LO_DS:
9047 break;
9048 }
9049
9050 r_symndx = ELF64_R_SYM (rel->r_info);
9051 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9052 r_symndx, ibfd))
9053 goto error_ret;
9054
9055 if (sym_sec != toc)
9056 continue;
9057
9058 if (h != NULL)
9059 val = h->root.u.def.value;
9060 else
9061 val = sym->st_value;
9062 val += rel->r_addend;
9063
9064 if (val >= toc->size)
9065 continue;
9066
9067 /* Anything in the toc ought to be aligned to 8 bytes.
9068 If not, don't mark as unused. */
9069 if (val & 7)
9070 continue;
9071
9072 if (skip == NULL)
9073 {
9074 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9075 if (skip == NULL)
9076 goto error_ret;
9077 }
9078
9079 skip[val >> 3] = ref_from_discarded;
9080 }
9081
9082 if (elf_section_data (sec)->relocs != relstart)
9083 free (relstart);
9084 }
9085
9086 /* For largetoc loads of address constants, we can convert
9087 . addis rx,2,addr@got@ha
9088 . ld ry,addr@got@l(rx)
9089 to
9090 . addis rx,2,addr@toc@ha
9091 . addi ry,rx,addr@toc@l
9092 when addr is within 2G of the toc pointer. This then means
9093 that the word storing "addr" in the toc is no longer needed. */
9094
9095 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9096 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9097 && toc->reloc_count != 0)
9098 {
9099 /* Read toc relocs. */
9100 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9101 info->keep_memory);
9102 if (toc_relocs == NULL)
9103 goto error_ret;
9104
9105 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9106 {
9107 enum elf_ppc64_reloc_type r_type;
9108 unsigned long r_symndx;
9109 asection *sym_sec;
9110 struct elf_link_hash_entry *h;
9111 Elf_Internal_Sym *sym;
9112 bfd_vma val, addr;
9113
9114 r_type = ELF64_R_TYPE (rel->r_info);
9115 if (r_type != R_PPC64_ADDR64)
9116 continue;
9117
9118 r_symndx = ELF64_R_SYM (rel->r_info);
9119 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9120 r_symndx, ibfd))
9121 goto error_ret;
9122
9123 if (sym_sec == NULL
9124 || sym_sec->output_section == NULL
9125 || discarded_section (sym_sec))
9126 continue;
9127
9128 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9129 continue;
9130
9131 if (h != NULL)
9132 {
9133 if (h->type == STT_GNU_IFUNC)
9134 continue;
9135 val = h->root.u.def.value;
9136 }
9137 else
9138 {
9139 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9140 continue;
9141 val = sym->st_value;
9142 }
9143 val += rel->r_addend;
9144 val += sym_sec->output_section->vma + sym_sec->output_offset;
9145
9146 /* We don't yet know the exact toc pointer value, but we
9147 know it will be somewhere in the toc section. Don't
9148 optimize if the difference from any possible toc
9149 pointer is outside [ff..f80008000, 7fff7fff]. */
9150 addr = toc->output_section->vma + TOC_BASE_OFF;
9151 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9152 continue;
9153
9154 addr = toc->output_section->vma + toc->output_section->rawsize;
9155 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9156 continue;
9157
9158 if (skip == NULL)
9159 {
9160 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9161 if (skip == NULL)
9162 goto error_ret;
9163 }
9164
9165 skip[rel->r_offset >> 3]
9166 |= can_optimize | ((rel - toc_relocs) << 2);
9167 }
9168 }
9169
9170 if (skip == NULL)
9171 continue;
9172
9173 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9174 if (used == NULL)
9175 {
9176 error_ret:
9177 if (local_syms != NULL
9178 && symtab_hdr->contents != (unsigned char *) local_syms)
9179 free (local_syms);
9180 if (sec != NULL
9181 && relstart != NULL
9182 && elf_section_data (sec)->relocs != relstart)
9183 free (relstart);
9184 if (toc_relocs != NULL
9185 && elf_section_data (toc)->relocs != toc_relocs)
9186 free (toc_relocs);
9187 if (skip != NULL)
9188 free (skip);
9189 return FALSE;
9190 }
9191
9192 /* Now check all kept sections that might reference the toc.
9193 Check the toc itself last. */
9194 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9195 : ibfd->sections);
9196 sec != NULL;
9197 sec = (sec == toc ? NULL
9198 : sec->next == NULL ? toc
9199 : sec->next == toc && toc->next ? toc->next
9200 : sec->next))
9201 {
9202 int repeat;
9203
9204 if (sec->reloc_count == 0
9205 || discarded_section (sec)
9206 || get_opd_info (sec)
9207 || (sec->flags & SEC_ALLOC) == 0
9208 || (sec->flags & SEC_DEBUGGING) != 0)
9209 continue;
9210
9211 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9212 info->keep_memory);
9213 if (relstart == NULL)
9214 {
9215 free (used);
9216 goto error_ret;
9217 }
9218
9219 /* Mark toc entries referenced as used. */
9220 do
9221 {
9222 repeat = 0;
9223 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9224 {
9225 enum elf_ppc64_reloc_type r_type;
9226 unsigned long r_symndx;
9227 asection *sym_sec;
9228 struct elf_link_hash_entry *h;
9229 Elf_Internal_Sym *sym;
9230 bfd_vma val;
9231 enum {no_check, check_lo, check_ha} insn_check;
9232
9233 r_type = ELF64_R_TYPE (rel->r_info);
9234 switch (r_type)
9235 {
9236 default:
9237 insn_check = no_check;
9238 break;
9239
9240 case R_PPC64_GOT_TLSLD16_HA:
9241 case R_PPC64_GOT_TLSGD16_HA:
9242 case R_PPC64_GOT_TPREL16_HA:
9243 case R_PPC64_GOT_DTPREL16_HA:
9244 case R_PPC64_GOT16_HA:
9245 case R_PPC64_TOC16_HA:
9246 insn_check = check_ha;
9247 break;
9248
9249 case R_PPC64_GOT_TLSLD16_LO:
9250 case R_PPC64_GOT_TLSGD16_LO:
9251 case R_PPC64_GOT_TPREL16_LO_DS:
9252 case R_PPC64_GOT_DTPREL16_LO_DS:
9253 case R_PPC64_GOT16_LO:
9254 case R_PPC64_GOT16_LO_DS:
9255 case R_PPC64_TOC16_LO:
9256 case R_PPC64_TOC16_LO_DS:
9257 insn_check = check_lo;
9258 break;
9259 }
9260
9261 if (insn_check != no_check)
9262 {
9263 bfd_vma off = rel->r_offset & ~3;
9264 unsigned char buf[4];
9265 unsigned int insn;
9266
9267 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9268 {
9269 free (used);
9270 goto error_ret;
9271 }
9272 insn = bfd_get_32 (ibfd, buf);
9273 if (insn_check == check_lo
9274 ? !ok_lo_toc_insn (insn, r_type)
9275 : ((insn & ((0x3f << 26) | 0x1f << 16))
9276 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9277 {
9278 char str[12];
9279
9280 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9281 sprintf (str, "%#08x", insn);
9282 info->callbacks->einfo
9283 /* xgettext:c-format */
9284 (_("%H: toc optimization is not supported for"
9285 " %s instruction.\n"),
9286 ibfd, sec, rel->r_offset & ~3, str);
9287 }
9288 }
9289
9290 switch (r_type)
9291 {
9292 case R_PPC64_TOC16:
9293 case R_PPC64_TOC16_LO:
9294 case R_PPC64_TOC16_HI:
9295 case R_PPC64_TOC16_HA:
9296 case R_PPC64_TOC16_DS:
9297 case R_PPC64_TOC16_LO_DS:
9298 /* In case we're taking addresses of toc entries. */
9299 case R_PPC64_ADDR64:
9300 break;
9301
9302 default:
9303 continue;
9304 }
9305
9306 r_symndx = ELF64_R_SYM (rel->r_info);
9307 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9308 r_symndx, ibfd))
9309 {
9310 free (used);
9311 goto error_ret;
9312 }
9313
9314 if (sym_sec != toc)
9315 continue;
9316
9317 if (h != NULL)
9318 val = h->root.u.def.value;
9319 else
9320 val = sym->st_value;
9321 val += rel->r_addend;
9322
9323 if (val >= toc->size)
9324 continue;
9325
9326 if ((skip[val >> 3] & can_optimize) != 0)
9327 {
9328 bfd_vma off;
9329 unsigned char opc;
9330
9331 switch (r_type)
9332 {
9333 case R_PPC64_TOC16_HA:
9334 break;
9335
9336 case R_PPC64_TOC16_LO_DS:
9337 off = rel->r_offset;
9338 off += (bfd_big_endian (ibfd) ? -2 : 3);
9339 if (!bfd_get_section_contents (ibfd, sec, &opc,
9340 off, 1))
9341 {
9342 free (used);
9343 goto error_ret;
9344 }
9345 if ((opc & (0x3f << 2)) == (58u << 2))
9346 break;
9347 /* Fall through. */
9348
9349 default:
9350 /* Wrong sort of reloc, or not a ld. We may
9351 as well clear ref_from_discarded too. */
9352 skip[val >> 3] = 0;
9353 }
9354 }
9355
9356 if (sec != toc)
9357 used[val >> 3] = 1;
9358 /* For the toc section, we only mark as used if this
9359 entry itself isn't unused. */
9360 else if ((used[rel->r_offset >> 3]
9361 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9362 && !used[val >> 3])
9363 {
9364 /* Do all the relocs again, to catch reference
9365 chains. */
9366 repeat = 1;
9367 used[val >> 3] = 1;
9368 }
9369 }
9370 }
9371 while (repeat);
9372
9373 if (elf_section_data (sec)->relocs != relstart)
9374 free (relstart);
9375 }
9376
9377 /* Merge the used and skip arrays. Assume that TOC
9378 doublewords not appearing as either used or unused belong
9379 to to an entry more than one doubleword in size. */
9380 for (drop = skip, keep = used, last = 0, some_unused = 0;
9381 drop < skip + (toc->size + 7) / 8;
9382 ++drop, ++keep)
9383 {
9384 if (*keep)
9385 {
9386 *drop &= ~ref_from_discarded;
9387 if ((*drop & can_optimize) != 0)
9388 some_unused = 1;
9389 last = 0;
9390 }
9391 else if ((*drop & ref_from_discarded) != 0)
9392 {
9393 some_unused = 1;
9394 last = ref_from_discarded;
9395 }
9396 else
9397 *drop = last;
9398 }
9399
9400 free (used);
9401
9402 if (some_unused)
9403 {
9404 bfd_byte *contents, *src;
9405 unsigned long off;
9406 Elf_Internal_Sym *sym;
9407 bfd_boolean local_toc_syms = FALSE;
9408
9409 /* Shuffle the toc contents, and at the same time convert the
9410 skip array from booleans into offsets. */
9411 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9412 goto error_ret;
9413
9414 elf_section_data (toc)->this_hdr.contents = contents;
9415
9416 for (src = contents, off = 0, drop = skip;
9417 src < contents + toc->size;
9418 src += 8, ++drop)
9419 {
9420 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9421 off += 8;
9422 else if (off != 0)
9423 {
9424 *drop = off;
9425 memcpy (src - off, src, 8);
9426 }
9427 }
9428 *drop = off;
9429 toc->rawsize = toc->size;
9430 toc->size = src - contents - off;
9431
9432 /* Adjust addends for relocs against the toc section sym,
9433 and optimize any accesses we can. */
9434 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9435 {
9436 if (sec->reloc_count == 0
9437 || discarded_section (sec))
9438 continue;
9439
9440 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9441 info->keep_memory);
9442 if (relstart == NULL)
9443 goto error_ret;
9444
9445 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9446 {
9447 enum elf_ppc64_reloc_type r_type;
9448 unsigned long r_symndx;
9449 asection *sym_sec;
9450 struct elf_link_hash_entry *h;
9451 bfd_vma val;
9452
9453 r_type = ELF64_R_TYPE (rel->r_info);
9454 switch (r_type)
9455 {
9456 default:
9457 continue;
9458
9459 case R_PPC64_TOC16:
9460 case R_PPC64_TOC16_LO:
9461 case R_PPC64_TOC16_HI:
9462 case R_PPC64_TOC16_HA:
9463 case R_PPC64_TOC16_DS:
9464 case R_PPC64_TOC16_LO_DS:
9465 case R_PPC64_ADDR64:
9466 break;
9467 }
9468
9469 r_symndx = ELF64_R_SYM (rel->r_info);
9470 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9471 r_symndx, ibfd))
9472 goto error_ret;
9473
9474 if (sym_sec != toc)
9475 continue;
9476
9477 if (h != NULL)
9478 val = h->root.u.def.value;
9479 else
9480 {
9481 val = sym->st_value;
9482 if (val != 0)
9483 local_toc_syms = TRUE;
9484 }
9485
9486 val += rel->r_addend;
9487
9488 if (val > toc->rawsize)
9489 val = toc->rawsize;
9490 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9491 continue;
9492 else if ((skip[val >> 3] & can_optimize) != 0)
9493 {
9494 Elf_Internal_Rela *tocrel
9495 = toc_relocs + (skip[val >> 3] >> 2);
9496 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9497
9498 switch (r_type)
9499 {
9500 case R_PPC64_TOC16_HA:
9501 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9502 break;
9503
9504 case R_PPC64_TOC16_LO_DS:
9505 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9506 break;
9507
9508 default:
9509 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9510 ppc_howto_init ();
9511 info->callbacks->einfo
9512 /* xgettext:c-format */
9513 (_("%H: %s references "
9514 "optimized away TOC entry\n"),
9515 ibfd, sec, rel->r_offset,
9516 ppc64_elf_howto_table[r_type]->name);
9517 bfd_set_error (bfd_error_bad_value);
9518 goto error_ret;
9519 }
9520 rel->r_addend = tocrel->r_addend;
9521 elf_section_data (sec)->relocs = relstart;
9522 continue;
9523 }
9524
9525 if (h != NULL || sym->st_value != 0)
9526 continue;
9527
9528 rel->r_addend -= skip[val >> 3];
9529 elf_section_data (sec)->relocs = relstart;
9530 }
9531
9532 if (elf_section_data (sec)->relocs != relstart)
9533 free (relstart);
9534 }
9535
9536 /* We shouldn't have local or global symbols defined in the TOC,
9537 but handle them anyway. */
9538 if (local_syms != NULL)
9539 for (sym = local_syms;
9540 sym < local_syms + symtab_hdr->sh_info;
9541 ++sym)
9542 if (sym->st_value != 0
9543 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9544 {
9545 unsigned long i;
9546
9547 if (sym->st_value > toc->rawsize)
9548 i = toc->rawsize >> 3;
9549 else
9550 i = sym->st_value >> 3;
9551
9552 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9553 {
9554 if (local_toc_syms)
9555 _bfd_error_handler
9556 (_("%s defined on removed toc entry"),
9557 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9558 do
9559 ++i;
9560 while ((skip[i] & (ref_from_discarded | can_optimize)));
9561 sym->st_value = (bfd_vma) i << 3;
9562 }
9563
9564 sym->st_value -= skip[i];
9565 symtab_hdr->contents = (unsigned char *) local_syms;
9566 }
9567
9568 /* Adjust any global syms defined in this toc input section. */
9569 if (toc_inf.global_toc_syms)
9570 {
9571 toc_inf.toc = toc;
9572 toc_inf.skip = skip;
9573 toc_inf.global_toc_syms = FALSE;
9574 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9575 &toc_inf);
9576 }
9577
9578 if (toc->reloc_count != 0)
9579 {
9580 Elf_Internal_Shdr *rel_hdr;
9581 Elf_Internal_Rela *wrel;
9582 bfd_size_type sz;
9583
9584 /* Remove unused toc relocs, and adjust those we keep. */
9585 if (toc_relocs == NULL)
9586 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9587 info->keep_memory);
9588 if (toc_relocs == NULL)
9589 goto error_ret;
9590
9591 wrel = toc_relocs;
9592 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9593 if ((skip[rel->r_offset >> 3]
9594 & (ref_from_discarded | can_optimize)) == 0)
9595 {
9596 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9597 wrel->r_info = rel->r_info;
9598 wrel->r_addend = rel->r_addend;
9599 ++wrel;
9600 }
9601 else if (!dec_dynrel_count (rel->r_info, toc, info,
9602 &local_syms, NULL, NULL))
9603 goto error_ret;
9604
9605 elf_section_data (toc)->relocs = toc_relocs;
9606 toc->reloc_count = wrel - toc_relocs;
9607 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9608 sz = rel_hdr->sh_entsize;
9609 rel_hdr->sh_size = toc->reloc_count * sz;
9610 }
9611 }
9612 else if (toc_relocs != NULL
9613 && elf_section_data (toc)->relocs != toc_relocs)
9614 free (toc_relocs);
9615
9616 if (local_syms != NULL
9617 && symtab_hdr->contents != (unsigned char *) local_syms)
9618 {
9619 if (!info->keep_memory)
9620 free (local_syms);
9621 else
9622 symtab_hdr->contents = (unsigned char *) local_syms;
9623 }
9624 free (skip);
9625 }
9626
9627 return TRUE;
9628 }
9629
9630 /* Return true iff input section I references the TOC using
9631 instructions limited to +/-32k offsets. */
9632
9633 bfd_boolean
9634 ppc64_elf_has_small_toc_reloc (asection *i)
9635 {
9636 return (is_ppc64_elf (i->owner)
9637 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9638 }
9639
9640 /* Allocate space for one GOT entry. */
9641
9642 static void
9643 allocate_got (struct elf_link_hash_entry *h,
9644 struct bfd_link_info *info,
9645 struct got_entry *gent)
9646 {
9647 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9648 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9649 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9650 ? 16 : 8);
9651 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9652 ? 2 : 1) * sizeof (Elf64_External_Rela);
9653 asection *got = ppc64_elf_tdata (gent->owner)->got;
9654
9655 gent->got.offset = got->size;
9656 got->size += entsize;
9657
9658 if (h->type == STT_GNU_IFUNC)
9659 {
9660 htab->elf.irelplt->size += rentsize;
9661 htab->got_reli_size += rentsize;
9662 }
9663 else if ((bfd_link_pic (info)
9664 || (htab->elf.dynamic_sections_created
9665 && h->dynindx != -1
9666 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9667 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9668 {
9669 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9670 relgot->size += rentsize;
9671 }
9672 }
9673
9674 /* This function merges got entries in the same toc group. */
9675
9676 static void
9677 merge_got_entries (struct got_entry **pent)
9678 {
9679 struct got_entry *ent, *ent2;
9680
9681 for (ent = *pent; ent != NULL; ent = ent->next)
9682 if (!ent->is_indirect)
9683 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9684 if (!ent2->is_indirect
9685 && ent2->addend == ent->addend
9686 && ent2->tls_type == ent->tls_type
9687 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9688 {
9689 ent2->is_indirect = TRUE;
9690 ent2->got.ent = ent;
9691 }
9692 }
9693
9694 /* If H is undefined weak, make it dynamic if that makes sense. */
9695
9696 static bfd_boolean
9697 ensure_undefweak_dynamic (struct bfd_link_info *info,
9698 struct elf_link_hash_entry *h)
9699 {
9700 struct elf_link_hash_table *htab = elf_hash_table (info);
9701
9702 if (htab->dynamic_sections_created
9703 && info->dynamic_undefined_weak != 0
9704 && h->root.type == bfd_link_hash_undefweak
9705 && h->dynindx == -1
9706 && !h->forced_local
9707 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9708 return bfd_elf_link_record_dynamic_symbol (info, h);
9709 return TRUE;
9710 }
9711
9712 /* Allocate space in .plt, .got and associated reloc sections for
9713 dynamic relocs. */
9714
9715 static bfd_boolean
9716 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9717 {
9718 struct bfd_link_info *info;
9719 struct ppc_link_hash_table *htab;
9720 asection *s;
9721 struct ppc_link_hash_entry *eh;
9722 struct got_entry **pgent, *gent;
9723
9724 if (h->root.type == bfd_link_hash_indirect)
9725 return TRUE;
9726
9727 info = (struct bfd_link_info *) inf;
9728 htab = ppc_hash_table (info);
9729 if (htab == NULL)
9730 return FALSE;
9731
9732 eh = (struct ppc_link_hash_entry *) h;
9733 /* Run through the TLS GD got entries first if we're changing them
9734 to TPREL. */
9735 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9736 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9737 if (gent->got.refcount > 0
9738 && (gent->tls_type & TLS_GD) != 0)
9739 {
9740 /* This was a GD entry that has been converted to TPREL. If
9741 there happens to be a TPREL entry we can use that one. */
9742 struct got_entry *ent;
9743 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9744 if (ent->got.refcount > 0
9745 && (ent->tls_type & TLS_TPREL) != 0
9746 && ent->addend == gent->addend
9747 && ent->owner == gent->owner)
9748 {
9749 gent->got.refcount = 0;
9750 break;
9751 }
9752
9753 /* If not, then we'll be using our own TPREL entry. */
9754 if (gent->got.refcount != 0)
9755 gent->tls_type = TLS_TLS | TLS_TPREL;
9756 }
9757
9758 /* Remove any list entry that won't generate a word in the GOT before
9759 we call merge_got_entries. Otherwise we risk merging to empty
9760 entries. */
9761 pgent = &h->got.glist;
9762 while ((gent = *pgent) != NULL)
9763 if (gent->got.refcount > 0)
9764 {
9765 if ((gent->tls_type & TLS_LD) != 0
9766 && !h->def_dynamic)
9767 {
9768 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9769 *pgent = gent->next;
9770 }
9771 else
9772 pgent = &gent->next;
9773 }
9774 else
9775 *pgent = gent->next;
9776
9777 if (!htab->do_multi_toc)
9778 merge_got_entries (&h->got.glist);
9779
9780 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9781 if (!gent->is_indirect)
9782 {
9783 /* Make sure this symbol is output as a dynamic symbol.
9784 Undefined weak syms won't yet be marked as dynamic. */
9785 if (!ensure_undefweak_dynamic (info, h))
9786 return FALSE;
9787
9788 if (!is_ppc64_elf (gent->owner))
9789 abort ();
9790
9791 allocate_got (h, info, gent);
9792 }
9793
9794 /* If no dynamic sections we can't have dynamic relocs, except for
9795 IFUNCs which are handled even in static executables. */
9796 if (!htab->elf.dynamic_sections_created
9797 && h->type != STT_GNU_IFUNC)
9798 eh->dyn_relocs = NULL;
9799
9800 /* Also discard relocs on undefined weak syms with non-default
9801 visibility, or when dynamic_undefined_weak says so. */
9802 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9803 eh->dyn_relocs = NULL;
9804
9805 if (eh->dyn_relocs != NULL)
9806 {
9807 struct elf_dyn_relocs *p, **pp;
9808
9809 /* In the shared -Bsymbolic case, discard space allocated for
9810 dynamic pc-relative relocs against symbols which turn out to
9811 be defined in regular objects. For the normal shared case,
9812 discard space for relocs that have become local due to symbol
9813 visibility changes. */
9814
9815 if (bfd_link_pic (info))
9816 {
9817 /* Relocs that use pc_count are those that appear on a call
9818 insn, or certain REL relocs (see must_be_dyn_reloc) that
9819 can be generated via assembly. We want calls to
9820 protected symbols to resolve directly to the function
9821 rather than going via the plt. If people want function
9822 pointer comparisons to work as expected then they should
9823 avoid writing weird assembly. */
9824 if (SYMBOL_CALLS_LOCAL (info, h))
9825 {
9826 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9827 {
9828 p->count -= p->pc_count;
9829 p->pc_count = 0;
9830 if (p->count == 0)
9831 *pp = p->next;
9832 else
9833 pp = &p->next;
9834 }
9835 }
9836
9837 if (eh->dyn_relocs != NULL)
9838 {
9839 /* Make sure this symbol is output as a dynamic symbol.
9840 Undefined weak syms won't yet be marked as dynamic. */
9841 if (!ensure_undefweak_dynamic (info, h))
9842 return FALSE;
9843 }
9844 }
9845 else if (h->type == STT_GNU_IFUNC)
9846 {
9847 /* A plt entry is always created when making direct calls to
9848 an ifunc, even when building a static executable, but
9849 that doesn't cover all cases. We may have only an ifunc
9850 initialised function pointer for a given ifunc symbol.
9851
9852 For ELFv2, dynamic relocations are not required when
9853 generating a global entry PLT stub. */
9854 if (abiversion (info->output_bfd) >= 2)
9855 {
9856 if (global_entry_stub (h))
9857 eh->dyn_relocs = NULL;
9858 }
9859
9860 /* For ELFv1 we have function descriptors. Descriptors need
9861 to be treated like PLT entries and thus have dynamic
9862 relocations. One exception is when the function
9863 descriptor is copied into .dynbss (which should only
9864 happen with ancient versions of gcc). */
9865 else if (h->needs_copy)
9866 eh->dyn_relocs = NULL;
9867 }
9868 else if (ELIMINATE_COPY_RELOCS)
9869 {
9870 /* For the non-pic case, discard space for relocs against
9871 symbols which turn out to need copy relocs or are not
9872 dynamic. */
9873 if (!h->non_got_ref
9874 && !h->def_regular)
9875 {
9876 /* Make sure this symbol is output as a dynamic symbol.
9877 Undefined weak syms won't yet be marked as dynamic. */
9878 if (!ensure_undefweak_dynamic (info, h))
9879 return FALSE;
9880
9881 if (h->dynindx == -1)
9882 eh->dyn_relocs = NULL;
9883 }
9884 else
9885 eh->dyn_relocs = NULL;
9886 }
9887
9888 /* Finally, allocate space. */
9889 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9890 {
9891 asection *sreloc = elf_section_data (p->sec)->sreloc;
9892 if (eh->elf.type == STT_GNU_IFUNC)
9893 sreloc = htab->elf.irelplt;
9894 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9895 }
9896 }
9897
9898 if ((htab->elf.dynamic_sections_created
9899 && h->dynindx != -1)
9900 || h->type == STT_GNU_IFUNC)
9901 {
9902 struct plt_entry *pent;
9903 bfd_boolean doneone = FALSE;
9904 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9905 if (pent->plt.refcount > 0)
9906 {
9907 if (!htab->elf.dynamic_sections_created
9908 || h->dynindx == -1)
9909 {
9910 s = htab->elf.iplt;
9911 pent->plt.offset = s->size;
9912 s->size += PLT_ENTRY_SIZE (htab);
9913 s = htab->elf.irelplt;
9914 }
9915 else
9916 {
9917 /* If this is the first .plt entry, make room for the special
9918 first entry. */
9919 s = htab->elf.splt;
9920 if (s->size == 0)
9921 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9922
9923 pent->plt.offset = s->size;
9924
9925 /* Make room for this entry. */
9926 s->size += PLT_ENTRY_SIZE (htab);
9927
9928 /* Make room for the .glink code. */
9929 s = htab->glink;
9930 if (s->size == 0)
9931 s->size += GLINK_CALL_STUB_SIZE;
9932 if (htab->opd_abi)
9933 {
9934 /* We need bigger stubs past index 32767. */
9935 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9936 s->size += 4;
9937 s->size += 2*4;
9938 }
9939 else
9940 s->size += 4;
9941
9942 /* We also need to make an entry in the .rela.plt section. */
9943 s = htab->elf.srelplt;
9944 }
9945 s->size += sizeof (Elf64_External_Rela);
9946 doneone = TRUE;
9947 }
9948 else
9949 pent->plt.offset = (bfd_vma) -1;
9950 if (!doneone)
9951 {
9952 h->plt.plist = NULL;
9953 h->needs_plt = 0;
9954 }
9955 }
9956 else
9957 {
9958 h->plt.plist = NULL;
9959 h->needs_plt = 0;
9960 }
9961
9962 return TRUE;
9963 }
9964
9965 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9966 to set up space for global entry stubs. These are put in glink,
9967 after the branch table. */
9968
9969 static bfd_boolean
9970 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9971 {
9972 struct bfd_link_info *info;
9973 struct ppc_link_hash_table *htab;
9974 struct plt_entry *pent;
9975 asection *s;
9976
9977 if (h->root.type == bfd_link_hash_indirect)
9978 return TRUE;
9979
9980 if (!h->pointer_equality_needed)
9981 return TRUE;
9982
9983 if (h->def_regular)
9984 return TRUE;
9985
9986 info = inf;
9987 htab = ppc_hash_table (info);
9988 if (htab == NULL)
9989 return FALSE;
9990
9991 s = htab->glink;
9992 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9993 if (pent->plt.offset != (bfd_vma) -1
9994 && pent->addend == 0)
9995 {
9996 /* For ELFv2, if this symbol is not defined in a regular file
9997 and we are not generating a shared library or pie, then we
9998 need to define the symbol in the executable on a call stub.
9999 This is to avoid text relocations. */
10000 s->size = (s->size + 15) & -16;
10001 h->root.type = bfd_link_hash_defined;
10002 h->root.u.def.section = s;
10003 h->root.u.def.value = s->size;
10004 s->size += 16;
10005 break;
10006 }
10007 return TRUE;
10008 }
10009
10010 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
10011 read-only sections. */
10012
10013 static bfd_boolean
10014 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
10015 {
10016 if (h->root.type == bfd_link_hash_indirect)
10017 return TRUE;
10018
10019 if (readonly_dynrelocs (h))
10020 {
10021 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
10022
10023 /* Not an error, just cut short the traversal. */
10024 return FALSE;
10025 }
10026 return TRUE;
10027 }
10028
10029 /* Set the sizes of the dynamic sections. */
10030
10031 static bfd_boolean
10032 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10033 struct bfd_link_info *info)
10034 {
10035 struct ppc_link_hash_table *htab;
10036 bfd *dynobj;
10037 asection *s;
10038 bfd_boolean relocs;
10039 bfd *ibfd;
10040 struct got_entry *first_tlsld;
10041
10042 htab = ppc_hash_table (info);
10043 if (htab == NULL)
10044 return FALSE;
10045
10046 dynobj = htab->elf.dynobj;
10047 if (dynobj == NULL)
10048 abort ();
10049
10050 if (htab->elf.dynamic_sections_created)
10051 {
10052 /* Set the contents of the .interp section to the interpreter. */
10053 if (bfd_link_executable (info) && !info->nointerp)
10054 {
10055 s = bfd_get_linker_section (dynobj, ".interp");
10056 if (s == NULL)
10057 abort ();
10058 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10059 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10060 }
10061 }
10062
10063 /* Set up .got offsets for local syms, and space for local dynamic
10064 relocs. */
10065 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10066 {
10067 struct got_entry **lgot_ents;
10068 struct got_entry **end_lgot_ents;
10069 struct plt_entry **local_plt;
10070 struct plt_entry **end_local_plt;
10071 unsigned char *lgot_masks;
10072 bfd_size_type locsymcount;
10073 Elf_Internal_Shdr *symtab_hdr;
10074
10075 if (!is_ppc64_elf (ibfd))
10076 continue;
10077
10078 for (s = ibfd->sections; s != NULL; s = s->next)
10079 {
10080 struct ppc_dyn_relocs *p;
10081
10082 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10083 {
10084 if (!bfd_is_abs_section (p->sec)
10085 && bfd_is_abs_section (p->sec->output_section))
10086 {
10087 /* Input section has been discarded, either because
10088 it is a copy of a linkonce section or due to
10089 linker script /DISCARD/, so we'll be discarding
10090 the relocs too. */
10091 }
10092 else if (p->count != 0)
10093 {
10094 asection *srel = elf_section_data (p->sec)->sreloc;
10095 if (p->ifunc)
10096 srel = htab->elf.irelplt;
10097 srel->size += p->count * sizeof (Elf64_External_Rela);
10098 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10099 info->flags |= DF_TEXTREL;
10100 }
10101 }
10102 }
10103
10104 lgot_ents = elf_local_got_ents (ibfd);
10105 if (!lgot_ents)
10106 continue;
10107
10108 symtab_hdr = &elf_symtab_hdr (ibfd);
10109 locsymcount = symtab_hdr->sh_info;
10110 end_lgot_ents = lgot_ents + locsymcount;
10111 local_plt = (struct plt_entry **) end_lgot_ents;
10112 end_local_plt = local_plt + locsymcount;
10113 lgot_masks = (unsigned char *) end_local_plt;
10114 s = ppc64_elf_tdata (ibfd)->got;
10115 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10116 {
10117 struct got_entry **pent, *ent;
10118
10119 pent = lgot_ents;
10120 while ((ent = *pent) != NULL)
10121 if (ent->got.refcount > 0)
10122 {
10123 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10124 {
10125 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10126 *pent = ent->next;
10127 }
10128 else
10129 {
10130 unsigned int ent_size = 8;
10131 unsigned int rel_size = sizeof (Elf64_External_Rela);
10132
10133 ent->got.offset = s->size;
10134 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10135 {
10136 ent_size *= 2;
10137 rel_size *= 2;
10138 }
10139 s->size += ent_size;
10140 if ((*lgot_masks & PLT_IFUNC) != 0)
10141 {
10142 htab->elf.irelplt->size += rel_size;
10143 htab->got_reli_size += rel_size;
10144 }
10145 else if (bfd_link_pic (info))
10146 {
10147 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10148 srel->size += rel_size;
10149 }
10150 pent = &ent->next;
10151 }
10152 }
10153 else
10154 *pent = ent->next;
10155 }
10156
10157 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10158 for (; local_plt < end_local_plt; ++local_plt)
10159 {
10160 struct plt_entry *ent;
10161
10162 for (ent = *local_plt; ent != NULL; ent = ent->next)
10163 if (ent->plt.refcount > 0)
10164 {
10165 s = htab->elf.iplt;
10166 ent->plt.offset = s->size;
10167 s->size += PLT_ENTRY_SIZE (htab);
10168
10169 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10170 }
10171 else
10172 ent->plt.offset = (bfd_vma) -1;
10173 }
10174 }
10175
10176 /* Allocate global sym .plt and .got entries, and space for global
10177 sym dynamic relocs. */
10178 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10179 /* Stash the end of glink branch table. */
10180 if (htab->glink != NULL)
10181 htab->glink->rawsize = htab->glink->size;
10182
10183 if (!htab->opd_abi && !bfd_link_pic (info))
10184 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10185
10186 first_tlsld = NULL;
10187 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10188 {
10189 struct got_entry *ent;
10190
10191 if (!is_ppc64_elf (ibfd))
10192 continue;
10193
10194 ent = ppc64_tlsld_got (ibfd);
10195 if (ent->got.refcount > 0)
10196 {
10197 if (!htab->do_multi_toc && first_tlsld != NULL)
10198 {
10199 ent->is_indirect = TRUE;
10200 ent->got.ent = first_tlsld;
10201 }
10202 else
10203 {
10204 if (first_tlsld == NULL)
10205 first_tlsld = ent;
10206 s = ppc64_elf_tdata (ibfd)->got;
10207 ent->got.offset = s->size;
10208 ent->owner = ibfd;
10209 s->size += 16;
10210 if (bfd_link_pic (info))
10211 {
10212 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10213 srel->size += sizeof (Elf64_External_Rela);
10214 }
10215 }
10216 }
10217 else
10218 ent->got.offset = (bfd_vma) -1;
10219 }
10220
10221 /* We now have determined the sizes of the various dynamic sections.
10222 Allocate memory for them. */
10223 relocs = FALSE;
10224 for (s = dynobj->sections; s != NULL; s = s->next)
10225 {
10226 if ((s->flags & SEC_LINKER_CREATED) == 0)
10227 continue;
10228
10229 if (s == htab->brlt || s == htab->relbrlt)
10230 /* These haven't been allocated yet; don't strip. */
10231 continue;
10232 else if (s == htab->elf.sgot
10233 || s == htab->elf.splt
10234 || s == htab->elf.iplt
10235 || s == htab->glink
10236 || s == htab->elf.sdynbss
10237 || s == htab->elf.sdynrelro)
10238 {
10239 /* Strip this section if we don't need it; see the
10240 comment below. */
10241 }
10242 else if (s == htab->glink_eh_frame)
10243 {
10244 if (!bfd_is_abs_section (s->output_section))
10245 /* Not sized yet. */
10246 continue;
10247 }
10248 else if (CONST_STRNEQ (s->name, ".rela"))
10249 {
10250 if (s->size != 0)
10251 {
10252 if (s != htab->elf.srelplt)
10253 relocs = TRUE;
10254
10255 /* We use the reloc_count field as a counter if we need
10256 to copy relocs into the output file. */
10257 s->reloc_count = 0;
10258 }
10259 }
10260 else
10261 {
10262 /* It's not one of our sections, so don't allocate space. */
10263 continue;
10264 }
10265
10266 if (s->size == 0)
10267 {
10268 /* If we don't need this section, strip it from the
10269 output file. This is mostly to handle .rela.bss and
10270 .rela.plt. We must create both sections in
10271 create_dynamic_sections, because they must be created
10272 before the linker maps input sections to output
10273 sections. The linker does that before
10274 adjust_dynamic_symbol is called, and it is that
10275 function which decides whether anything needs to go
10276 into these sections. */
10277 s->flags |= SEC_EXCLUDE;
10278 continue;
10279 }
10280
10281 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10282 continue;
10283
10284 /* Allocate memory for the section contents. We use bfd_zalloc
10285 here in case unused entries are not reclaimed before the
10286 section's contents are written out. This should not happen,
10287 but this way if it does we get a R_PPC64_NONE reloc in .rela
10288 sections instead of garbage.
10289 We also rely on the section contents being zero when writing
10290 the GOT and .dynrelro. */
10291 s->contents = bfd_zalloc (dynobj, s->size);
10292 if (s->contents == NULL)
10293 return FALSE;
10294 }
10295
10296 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10297 {
10298 if (!is_ppc64_elf (ibfd))
10299 continue;
10300
10301 s = ppc64_elf_tdata (ibfd)->got;
10302 if (s != NULL && s != htab->elf.sgot)
10303 {
10304 if (s->size == 0)
10305 s->flags |= SEC_EXCLUDE;
10306 else
10307 {
10308 s->contents = bfd_zalloc (ibfd, s->size);
10309 if (s->contents == NULL)
10310 return FALSE;
10311 }
10312 }
10313 s = ppc64_elf_tdata (ibfd)->relgot;
10314 if (s != NULL)
10315 {
10316 if (s->size == 0)
10317 s->flags |= SEC_EXCLUDE;
10318 else
10319 {
10320 s->contents = bfd_zalloc (ibfd, s->size);
10321 if (s->contents == NULL)
10322 return FALSE;
10323 relocs = TRUE;
10324 s->reloc_count = 0;
10325 }
10326 }
10327 }
10328
10329 if (htab->elf.dynamic_sections_created)
10330 {
10331 bfd_boolean tls_opt;
10332
10333 /* Add some entries to the .dynamic section. We fill in the
10334 values later, in ppc64_elf_finish_dynamic_sections, but we
10335 must add the entries now so that we get the correct size for
10336 the .dynamic section. The DT_DEBUG entry is filled in by the
10337 dynamic linker and used by the debugger. */
10338 #define add_dynamic_entry(TAG, VAL) \
10339 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10340
10341 if (bfd_link_executable (info))
10342 {
10343 if (!add_dynamic_entry (DT_DEBUG, 0))
10344 return FALSE;
10345 }
10346
10347 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10348 {
10349 if (!add_dynamic_entry (DT_PLTGOT, 0)
10350 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10351 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10352 || !add_dynamic_entry (DT_JMPREL, 0)
10353 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10354 return FALSE;
10355 }
10356
10357 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10358 {
10359 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10360 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10361 return FALSE;
10362 }
10363
10364 tls_opt = (htab->params->tls_get_addr_opt
10365 && htab->tls_get_addr_fd != NULL
10366 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10367 if (tls_opt || !htab->opd_abi)
10368 {
10369 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10370 return FALSE;
10371 }
10372
10373 if (relocs)
10374 {
10375 if (!add_dynamic_entry (DT_RELA, 0)
10376 || !add_dynamic_entry (DT_RELASZ, 0)
10377 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10378 return FALSE;
10379
10380 /* If any dynamic relocs apply to a read-only section,
10381 then we need a DT_TEXTREL entry. */
10382 if ((info->flags & DF_TEXTREL) == 0)
10383 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10384
10385 if ((info->flags & DF_TEXTREL) != 0)
10386 {
10387 if (!add_dynamic_entry (DT_TEXTREL, 0))
10388 return FALSE;
10389 }
10390 }
10391 }
10392 #undef add_dynamic_entry
10393
10394 return TRUE;
10395 }
10396
10397 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10398
10399 static bfd_boolean
10400 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10401 {
10402 if (h->plt.plist != NULL
10403 && !h->def_regular
10404 && !h->pointer_equality_needed)
10405 return FALSE;
10406
10407 return _bfd_elf_hash_symbol (h);
10408 }
10409
10410 /* Determine the type of stub needed, if any, for a call. */
10411
10412 static inline enum ppc_stub_type
10413 ppc_type_of_stub (asection *input_sec,
10414 const Elf_Internal_Rela *rel,
10415 struct ppc_link_hash_entry **hash,
10416 struct plt_entry **plt_ent,
10417 bfd_vma destination,
10418 unsigned long local_off)
10419 {
10420 struct ppc_link_hash_entry *h = *hash;
10421 bfd_vma location;
10422 bfd_vma branch_offset;
10423 bfd_vma max_branch_offset;
10424 enum elf_ppc64_reloc_type r_type;
10425
10426 if (h != NULL)
10427 {
10428 struct plt_entry *ent;
10429 struct ppc_link_hash_entry *fdh = h;
10430 if (h->oh != NULL
10431 && h->oh->is_func_descriptor)
10432 {
10433 fdh = ppc_follow_link (h->oh);
10434 *hash = fdh;
10435 }
10436
10437 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10438 if (ent->addend == rel->r_addend
10439 && ent->plt.offset != (bfd_vma) -1)
10440 {
10441 *plt_ent = ent;
10442 return ppc_stub_plt_call;
10443 }
10444
10445 /* Here, we know we don't have a plt entry. If we don't have a
10446 either a defined function descriptor or a defined entry symbol
10447 in a regular object file, then it is pointless trying to make
10448 any other type of stub. */
10449 if (!is_static_defined (&fdh->elf)
10450 && !is_static_defined (&h->elf))
10451 return ppc_stub_none;
10452 }
10453 else if (elf_local_got_ents (input_sec->owner) != NULL)
10454 {
10455 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10456 struct plt_entry **local_plt = (struct plt_entry **)
10457 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10458 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10459
10460 if (local_plt[r_symndx] != NULL)
10461 {
10462 struct plt_entry *ent;
10463
10464 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10465 if (ent->addend == rel->r_addend
10466 && ent->plt.offset != (bfd_vma) -1)
10467 {
10468 *plt_ent = ent;
10469 return ppc_stub_plt_call;
10470 }
10471 }
10472 }
10473
10474 /* Determine where the call point is. */
10475 location = (input_sec->output_offset
10476 + input_sec->output_section->vma
10477 + rel->r_offset);
10478
10479 branch_offset = destination - location;
10480 r_type = ELF64_R_TYPE (rel->r_info);
10481
10482 /* Determine if a long branch stub is needed. */
10483 max_branch_offset = 1 << 25;
10484 if (r_type != R_PPC64_REL24)
10485 max_branch_offset = 1 << 15;
10486
10487 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10488 /* We need a stub. Figure out whether a long_branch or plt_branch
10489 is needed later. */
10490 return ppc_stub_long_branch;
10491
10492 return ppc_stub_none;
10493 }
10494
10495 /* With power7 weakly ordered memory model, it is possible for ld.so
10496 to update a plt entry in one thread and have another thread see a
10497 stale zero toc entry. To avoid this we need some sort of acquire
10498 barrier in the call stub. One solution is to make the load of the
10499 toc word seem to appear to depend on the load of the function entry
10500 word. Another solution is to test for r2 being zero, and branch to
10501 the appropriate glink entry if so.
10502
10503 . fake dep barrier compare
10504 . ld 12,xxx(2) ld 12,xxx(2)
10505 . mtctr 12 mtctr 12
10506 . xor 11,12,12 ld 2,xxx+8(2)
10507 . add 2,2,11 cmpldi 2,0
10508 . ld 2,xxx+8(2) bnectr+
10509 . bctr b <glink_entry>
10510
10511 The solution involving the compare turns out to be faster, so
10512 that's what we use unless the branch won't reach. */
10513
10514 #define ALWAYS_USE_FAKE_DEP 0
10515 #define ALWAYS_EMIT_R2SAVE 0
10516
10517 #define PPC_LO(v) ((v) & 0xffff)
10518 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10519 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10520
10521 static inline unsigned int
10522 plt_stub_size (struct ppc_link_hash_table *htab,
10523 struct ppc_stub_hash_entry *stub_entry,
10524 bfd_vma off)
10525 {
10526 unsigned size = 12;
10527
10528 if (ALWAYS_EMIT_R2SAVE
10529 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10530 size += 4;
10531 if (PPC_HA (off) != 0)
10532 size += 4;
10533 if (htab->opd_abi)
10534 {
10535 size += 4;
10536 if (htab->params->plt_static_chain)
10537 size += 4;
10538 if (htab->params->plt_thread_safe
10539 && htab->elf.dynamic_sections_created
10540 && stub_entry->h != NULL
10541 && stub_entry->h->elf.dynindx != -1)
10542 size += 8;
10543 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10544 size += 4;
10545 }
10546 if (stub_entry->h != NULL
10547 && (stub_entry->h == htab->tls_get_addr_fd
10548 || stub_entry->h == htab->tls_get_addr)
10549 && htab->params->tls_get_addr_opt)
10550 size += 13 * 4;
10551 return size;
10552 }
10553
10554 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10555 then return the padding needed to do so. */
10556 static inline unsigned int
10557 plt_stub_pad (struct ppc_link_hash_table *htab,
10558 struct ppc_stub_hash_entry *stub_entry,
10559 bfd_vma plt_off)
10560 {
10561 int stub_align = 1 << htab->params->plt_stub_align;
10562 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10563 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10564
10565 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10566 > ((stub_size - 1) & -stub_align))
10567 return stub_align - (stub_off & (stub_align - 1));
10568 return 0;
10569 }
10570
10571 /* Build a .plt call stub. */
10572
10573 static inline bfd_byte *
10574 build_plt_stub (struct ppc_link_hash_table *htab,
10575 struct ppc_stub_hash_entry *stub_entry,
10576 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10577 {
10578 bfd *obfd = htab->params->stub_bfd;
10579 bfd_boolean plt_load_toc = htab->opd_abi;
10580 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10581 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10582 && htab->elf.dynamic_sections_created
10583 && stub_entry->h != NULL
10584 && stub_entry->h->elf.dynindx != -1);
10585 bfd_boolean use_fake_dep = plt_thread_safe;
10586 bfd_vma cmp_branch_off = 0;
10587
10588 if (!ALWAYS_USE_FAKE_DEP
10589 && plt_load_toc
10590 && plt_thread_safe
10591 && !((stub_entry->h == htab->tls_get_addr_fd
10592 || stub_entry->h == htab->tls_get_addr)
10593 && htab->params->tls_get_addr_opt))
10594 {
10595 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10596 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10597 / PLT_ENTRY_SIZE (htab));
10598 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10599 bfd_vma to, from;
10600
10601 if (pltindex > 32768)
10602 glinkoff += (pltindex - 32768) * 4;
10603 to = (glinkoff
10604 + htab->glink->output_offset
10605 + htab->glink->output_section->vma);
10606 from = (p - stub_entry->group->stub_sec->contents
10607 + 4 * (ALWAYS_EMIT_R2SAVE
10608 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10609 + 4 * (PPC_HA (offset) != 0)
10610 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10611 != PPC_HA (offset))
10612 + 4 * (plt_static_chain != 0)
10613 + 20
10614 + stub_entry->group->stub_sec->output_offset
10615 + stub_entry->group->stub_sec->output_section->vma);
10616 cmp_branch_off = to - from;
10617 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10618 }
10619
10620 if (PPC_HA (offset) != 0)
10621 {
10622 if (r != NULL)
10623 {
10624 if (ALWAYS_EMIT_R2SAVE
10625 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10626 r[0].r_offset += 4;
10627 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10628 r[1].r_offset = r[0].r_offset + 4;
10629 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10630 r[1].r_addend = r[0].r_addend;
10631 if (plt_load_toc)
10632 {
10633 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10634 {
10635 r[2].r_offset = r[1].r_offset + 4;
10636 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10637 r[2].r_addend = r[0].r_addend;
10638 }
10639 else
10640 {
10641 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10642 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10643 r[2].r_addend = r[0].r_addend + 8;
10644 if (plt_static_chain)
10645 {
10646 r[3].r_offset = r[2].r_offset + 4;
10647 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10648 r[3].r_addend = r[0].r_addend + 16;
10649 }
10650 }
10651 }
10652 }
10653 if (ALWAYS_EMIT_R2SAVE
10654 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10655 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10656 if (plt_load_toc)
10657 {
10658 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10659 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10660 }
10661 else
10662 {
10663 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10664 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10665 }
10666 if (plt_load_toc
10667 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10668 {
10669 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10670 offset = 0;
10671 }
10672 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10673 if (plt_load_toc)
10674 {
10675 if (use_fake_dep)
10676 {
10677 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10678 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10679 }
10680 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10681 if (plt_static_chain)
10682 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10683 }
10684 }
10685 else
10686 {
10687 if (r != NULL)
10688 {
10689 if (ALWAYS_EMIT_R2SAVE
10690 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10691 r[0].r_offset += 4;
10692 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10693 if (plt_load_toc)
10694 {
10695 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10696 {
10697 r[1].r_offset = r[0].r_offset + 4;
10698 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10699 r[1].r_addend = r[0].r_addend;
10700 }
10701 else
10702 {
10703 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10704 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10705 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10706 if (plt_static_chain)
10707 {
10708 r[2].r_offset = r[1].r_offset + 4;
10709 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10710 r[2].r_addend = r[0].r_addend + 8;
10711 }
10712 }
10713 }
10714 }
10715 if (ALWAYS_EMIT_R2SAVE
10716 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10717 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10718 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10719 if (plt_load_toc
10720 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10721 {
10722 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10723 offset = 0;
10724 }
10725 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10726 if (plt_load_toc)
10727 {
10728 if (use_fake_dep)
10729 {
10730 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10731 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10732 }
10733 if (plt_static_chain)
10734 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10735 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10736 }
10737 }
10738 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10739 {
10740 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10741 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10742 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10743 }
10744 else
10745 bfd_put_32 (obfd, BCTR, p), p += 4;
10746 return p;
10747 }
10748
10749 /* Build a special .plt call stub for __tls_get_addr. */
10750
10751 #define LD_R11_0R3 0xe9630000
10752 #define LD_R12_0R3 0xe9830000
10753 #define MR_R0_R3 0x7c601b78
10754 #define CMPDI_R11_0 0x2c2b0000
10755 #define ADD_R3_R12_R13 0x7c6c6a14
10756 #define BEQLR 0x4d820020
10757 #define MR_R3_R0 0x7c030378
10758 #define STD_R11_0R1 0xf9610000
10759 #define BCTRL 0x4e800421
10760 #define LD_R11_0R1 0xe9610000
10761 #define MTLR_R11 0x7d6803a6
10762
10763 static inline bfd_byte *
10764 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10765 struct ppc_stub_hash_entry *stub_entry,
10766 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10767 {
10768 bfd *obfd = htab->params->stub_bfd;
10769
10770 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10771 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10772 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10773 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10774 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10775 bfd_put_32 (obfd, BEQLR, p), p += 4;
10776 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10777 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10778 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10779
10780 if (r != NULL)
10781 r[0].r_offset += 9 * 4;
10782 p = build_plt_stub (htab, stub_entry, p, offset, r);
10783 bfd_put_32 (obfd, BCTRL, p - 4);
10784
10785 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10786 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10787 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10788 bfd_put_32 (obfd, BLR, p), p += 4;
10789
10790 return p;
10791 }
10792
10793 static Elf_Internal_Rela *
10794 get_relocs (asection *sec, int count)
10795 {
10796 Elf_Internal_Rela *relocs;
10797 struct bfd_elf_section_data *elfsec_data;
10798
10799 elfsec_data = elf_section_data (sec);
10800 relocs = elfsec_data->relocs;
10801 if (relocs == NULL)
10802 {
10803 bfd_size_type relsize;
10804 relsize = sec->reloc_count * sizeof (*relocs);
10805 relocs = bfd_alloc (sec->owner, relsize);
10806 if (relocs == NULL)
10807 return NULL;
10808 elfsec_data->relocs = relocs;
10809 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10810 sizeof (Elf_Internal_Shdr));
10811 if (elfsec_data->rela.hdr == NULL)
10812 return NULL;
10813 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10814 * sizeof (Elf64_External_Rela));
10815 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10816 sec->reloc_count = 0;
10817 }
10818 relocs += sec->reloc_count;
10819 sec->reloc_count += count;
10820 return relocs;
10821 }
10822
10823 static bfd_vma
10824 get_r2off (struct bfd_link_info *info,
10825 struct ppc_stub_hash_entry *stub_entry)
10826 {
10827 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10828 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10829
10830 if (r2off == 0)
10831 {
10832 /* Support linking -R objects. Get the toc pointer from the
10833 opd entry. */
10834 char buf[8];
10835 if (!htab->opd_abi)
10836 return r2off;
10837 asection *opd = stub_entry->h->elf.root.u.def.section;
10838 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10839
10840 if (strcmp (opd->name, ".opd") != 0
10841 || opd->reloc_count != 0)
10842 {
10843 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10844 stub_entry->h->elf.root.root.string);
10845 bfd_set_error (bfd_error_bad_value);
10846 return (bfd_vma) -1;
10847 }
10848 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10849 return (bfd_vma) -1;
10850 r2off = bfd_get_64 (opd->owner, buf);
10851 r2off -= elf_gp (info->output_bfd);
10852 }
10853 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10854 return r2off;
10855 }
10856
10857 static bfd_boolean
10858 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10859 {
10860 struct ppc_stub_hash_entry *stub_entry;
10861 struct ppc_branch_hash_entry *br_entry;
10862 struct bfd_link_info *info;
10863 struct ppc_link_hash_table *htab;
10864 bfd_byte *loc;
10865 bfd_byte *p;
10866 bfd_vma dest, off;
10867 int size;
10868 Elf_Internal_Rela *r;
10869 asection *plt;
10870
10871 /* Massage our args to the form they really have. */
10872 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10873 info = in_arg;
10874
10875 htab = ppc_hash_table (info);
10876 if (htab == NULL)
10877 return FALSE;
10878
10879 /* Make a note of the offset within the stubs for this entry. */
10880 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10881 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10882
10883 htab->stub_count[stub_entry->stub_type - 1] += 1;
10884 switch (stub_entry->stub_type)
10885 {
10886 case ppc_stub_long_branch:
10887 case ppc_stub_long_branch_r2off:
10888 /* Branches are relative. This is where we are going to. */
10889 dest = (stub_entry->target_value
10890 + stub_entry->target_section->output_offset
10891 + stub_entry->target_section->output_section->vma);
10892 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10893 off = dest;
10894
10895 /* And this is where we are coming from. */
10896 off -= (stub_entry->stub_offset
10897 + stub_entry->group->stub_sec->output_offset
10898 + stub_entry->group->stub_sec->output_section->vma);
10899
10900 size = 4;
10901 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10902 {
10903 bfd_vma r2off = get_r2off (info, stub_entry);
10904
10905 if (r2off == (bfd_vma) -1)
10906 {
10907 htab->stub_error = TRUE;
10908 return FALSE;
10909 }
10910 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10911 loc += 4;
10912 size = 8;
10913 if (PPC_HA (r2off) != 0)
10914 {
10915 bfd_put_32 (htab->params->stub_bfd,
10916 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10917 loc += 4;
10918 size += 4;
10919 }
10920 if (PPC_LO (r2off) != 0)
10921 {
10922 bfd_put_32 (htab->params->stub_bfd,
10923 ADDI_R2_R2 | PPC_LO (r2off), loc);
10924 loc += 4;
10925 size += 4;
10926 }
10927 off -= size - 4;
10928 }
10929 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10930
10931 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10932 {
10933 info->callbacks->einfo
10934 (_("%P: long branch stub `%s' offset overflow\n"),
10935 stub_entry->root.string);
10936 htab->stub_error = TRUE;
10937 return FALSE;
10938 }
10939
10940 if (info->emitrelocations)
10941 {
10942 r = get_relocs (stub_entry->group->stub_sec, 1);
10943 if (r == NULL)
10944 return FALSE;
10945 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10946 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10947 r->r_addend = dest;
10948 if (stub_entry->h != NULL)
10949 {
10950 struct elf_link_hash_entry **hashes;
10951 unsigned long symndx;
10952 struct ppc_link_hash_entry *h;
10953
10954 hashes = elf_sym_hashes (htab->params->stub_bfd);
10955 if (hashes == NULL)
10956 {
10957 bfd_size_type hsize;
10958
10959 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10960 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10961 if (hashes == NULL)
10962 return FALSE;
10963 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10964 htab->stub_globals = 1;
10965 }
10966 symndx = htab->stub_globals++;
10967 h = stub_entry->h;
10968 hashes[symndx] = &h->elf;
10969 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10970 if (h->oh != NULL && h->oh->is_func)
10971 h = ppc_follow_link (h->oh);
10972 if (h->elf.root.u.def.section != stub_entry->target_section)
10973 /* H is an opd symbol. The addend must be zero. */
10974 r->r_addend = 0;
10975 else
10976 {
10977 off = (h->elf.root.u.def.value
10978 + h->elf.root.u.def.section->output_offset
10979 + h->elf.root.u.def.section->output_section->vma);
10980 r->r_addend -= off;
10981 }
10982 }
10983 }
10984 break;
10985
10986 case ppc_stub_plt_branch:
10987 case ppc_stub_plt_branch_r2off:
10988 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10989 stub_entry->root.string + 9,
10990 FALSE, FALSE);
10991 if (br_entry == NULL)
10992 {
10993 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10994 stub_entry->root.string);
10995 htab->stub_error = TRUE;
10996 return FALSE;
10997 }
10998
10999 dest = (stub_entry->target_value
11000 + stub_entry->target_section->output_offset
11001 + stub_entry->target_section->output_section->vma);
11002 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11003 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11004
11005 bfd_put_64 (htab->brlt->owner, dest,
11006 htab->brlt->contents + br_entry->offset);
11007
11008 if (br_entry->iter == htab->stub_iteration)
11009 {
11010 br_entry->iter = 0;
11011
11012 if (htab->relbrlt != NULL)
11013 {
11014 /* Create a reloc for the branch lookup table entry. */
11015 Elf_Internal_Rela rela;
11016 bfd_byte *rl;
11017
11018 rela.r_offset = (br_entry->offset
11019 + htab->brlt->output_offset
11020 + htab->brlt->output_section->vma);
11021 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11022 rela.r_addend = dest;
11023
11024 rl = htab->relbrlt->contents;
11025 rl += (htab->relbrlt->reloc_count++
11026 * sizeof (Elf64_External_Rela));
11027 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11028 }
11029 else if (info->emitrelocations)
11030 {
11031 r = get_relocs (htab->brlt, 1);
11032 if (r == NULL)
11033 return FALSE;
11034 /* brlt, being SEC_LINKER_CREATED does not go through the
11035 normal reloc processing. Symbols and offsets are not
11036 translated from input file to output file form, so
11037 set up the offset per the output file. */
11038 r->r_offset = (br_entry->offset
11039 + htab->brlt->output_offset
11040 + htab->brlt->output_section->vma);
11041 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11042 r->r_addend = dest;
11043 }
11044 }
11045
11046 dest = (br_entry->offset
11047 + htab->brlt->output_offset
11048 + htab->brlt->output_section->vma);
11049
11050 off = (dest
11051 - elf_gp (htab->brlt->output_section->owner)
11052 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11053
11054 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11055 {
11056 info->callbacks->einfo
11057 (_("%P: linkage table error against `%T'\n"),
11058 stub_entry->root.string);
11059 bfd_set_error (bfd_error_bad_value);
11060 htab->stub_error = TRUE;
11061 return FALSE;
11062 }
11063
11064 if (info->emitrelocations)
11065 {
11066 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11067 if (r == NULL)
11068 return FALSE;
11069 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11070 if (bfd_big_endian (info->output_bfd))
11071 r[0].r_offset += 2;
11072 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11073 r[0].r_offset += 4;
11074 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11075 r[0].r_addend = dest;
11076 if (PPC_HA (off) != 0)
11077 {
11078 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11079 r[1].r_offset = r[0].r_offset + 4;
11080 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11081 r[1].r_addend = r[0].r_addend;
11082 }
11083 }
11084
11085 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11086 {
11087 if (PPC_HA (off) != 0)
11088 {
11089 size = 16;
11090 bfd_put_32 (htab->params->stub_bfd,
11091 ADDIS_R12_R2 | PPC_HA (off), loc);
11092 loc += 4;
11093 bfd_put_32 (htab->params->stub_bfd,
11094 LD_R12_0R12 | PPC_LO (off), loc);
11095 }
11096 else
11097 {
11098 size = 12;
11099 bfd_put_32 (htab->params->stub_bfd,
11100 LD_R12_0R2 | PPC_LO (off), loc);
11101 }
11102 }
11103 else
11104 {
11105 bfd_vma r2off = get_r2off (info, stub_entry);
11106
11107 if (r2off == (bfd_vma) -1)
11108 {
11109 htab->stub_error = TRUE;
11110 return FALSE;
11111 }
11112
11113 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11114 loc += 4;
11115 size = 16;
11116 if (PPC_HA (off) != 0)
11117 {
11118 size += 4;
11119 bfd_put_32 (htab->params->stub_bfd,
11120 ADDIS_R12_R2 | PPC_HA (off), loc);
11121 loc += 4;
11122 bfd_put_32 (htab->params->stub_bfd,
11123 LD_R12_0R12 | PPC_LO (off), loc);
11124 }
11125 else
11126 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11127
11128 if (PPC_HA (r2off) != 0)
11129 {
11130 size += 4;
11131 loc += 4;
11132 bfd_put_32 (htab->params->stub_bfd,
11133 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11134 }
11135 if (PPC_LO (r2off) != 0)
11136 {
11137 size += 4;
11138 loc += 4;
11139 bfd_put_32 (htab->params->stub_bfd,
11140 ADDI_R2_R2 | PPC_LO (r2off), loc);
11141 }
11142 }
11143 loc += 4;
11144 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11145 loc += 4;
11146 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11147 break;
11148
11149 case ppc_stub_plt_call:
11150 case ppc_stub_plt_call_r2save:
11151 if (stub_entry->h != NULL
11152 && stub_entry->h->is_func_descriptor
11153 && stub_entry->h->oh != NULL)
11154 {
11155 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11156
11157 /* If the old-ABI "dot-symbol" is undefined make it weak so
11158 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11159 if (fh->elf.root.type == bfd_link_hash_undefined
11160 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11161 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11162 fh->elf.root.type = bfd_link_hash_undefweak;
11163 }
11164
11165 /* Now build the stub. */
11166 dest = stub_entry->plt_ent->plt.offset & ~1;
11167 if (dest >= (bfd_vma) -2)
11168 abort ();
11169
11170 plt = htab->elf.splt;
11171 if (!htab->elf.dynamic_sections_created
11172 || stub_entry->h == NULL
11173 || stub_entry->h->elf.dynindx == -1)
11174 plt = htab->elf.iplt;
11175
11176 dest += plt->output_offset + plt->output_section->vma;
11177
11178 if (stub_entry->h == NULL
11179 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11180 {
11181 Elf_Internal_Rela rela;
11182 bfd_byte *rl;
11183
11184 rela.r_offset = dest;
11185 if (htab->opd_abi)
11186 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11187 else
11188 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11189 rela.r_addend = (stub_entry->target_value
11190 + stub_entry->target_section->output_offset
11191 + stub_entry->target_section->output_section->vma);
11192
11193 rl = (htab->elf.irelplt->contents
11194 + (htab->elf.irelplt->reloc_count++
11195 * sizeof (Elf64_External_Rela)));
11196 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11197 stub_entry->plt_ent->plt.offset |= 1;
11198 htab->local_ifunc_resolver = 1;
11199 }
11200
11201 off = (dest
11202 - elf_gp (plt->output_section->owner)
11203 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11204
11205 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11206 {
11207 info->callbacks->einfo
11208 /* xgettext:c-format */
11209 (_("%P: linkage table error against `%T'\n"),
11210 stub_entry->h != NULL
11211 ? stub_entry->h->elf.root.root.string
11212 : "<local sym>");
11213 bfd_set_error (bfd_error_bad_value);
11214 htab->stub_error = TRUE;
11215 return FALSE;
11216 }
11217
11218 if (htab->params->plt_stub_align != 0)
11219 {
11220 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11221
11222 stub_entry->group->stub_sec->size += pad;
11223 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11224 loc += pad;
11225 }
11226
11227 r = NULL;
11228 if (info->emitrelocations)
11229 {
11230 r = get_relocs (stub_entry->group->stub_sec,
11231 ((PPC_HA (off) != 0)
11232 + (htab->opd_abi
11233 ? 2 + (htab->params->plt_static_chain
11234 && PPC_HA (off + 16) == PPC_HA (off))
11235 : 1)));
11236 if (r == NULL)
11237 return FALSE;
11238 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11239 if (bfd_big_endian (info->output_bfd))
11240 r[0].r_offset += 2;
11241 r[0].r_addend = dest;
11242 }
11243 if (stub_entry->h != NULL
11244 && (stub_entry->h == htab->tls_get_addr_fd
11245 || stub_entry->h == htab->tls_get_addr)
11246 && htab->params->tls_get_addr_opt)
11247 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11248 else
11249 p = build_plt_stub (htab, stub_entry, loc, off, r);
11250 size = p - loc;
11251 break;
11252
11253 case ppc_stub_save_res:
11254 return TRUE;
11255
11256 default:
11257 BFD_FAIL ();
11258 return FALSE;
11259 }
11260
11261 stub_entry->group->stub_sec->size += size;
11262
11263 if (htab->params->emit_stub_syms)
11264 {
11265 struct elf_link_hash_entry *h;
11266 size_t len1, len2;
11267 char *name;
11268 const char *const stub_str[] = { "long_branch",
11269 "long_branch_r2off",
11270 "plt_branch",
11271 "plt_branch_r2off",
11272 "plt_call",
11273 "plt_call" };
11274
11275 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11276 len2 = strlen (stub_entry->root.string);
11277 name = bfd_malloc (len1 + len2 + 2);
11278 if (name == NULL)
11279 return FALSE;
11280 memcpy (name, stub_entry->root.string, 9);
11281 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11282 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11283 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11284 if (h == NULL)
11285 return FALSE;
11286 if (h->root.type == bfd_link_hash_new)
11287 {
11288 h->root.type = bfd_link_hash_defined;
11289 h->root.u.def.section = stub_entry->group->stub_sec;
11290 h->root.u.def.value = stub_entry->stub_offset;
11291 h->ref_regular = 1;
11292 h->def_regular = 1;
11293 h->ref_regular_nonweak = 1;
11294 h->forced_local = 1;
11295 h->non_elf = 0;
11296 h->root.linker_def = 1;
11297 }
11298 }
11299
11300 return TRUE;
11301 }
11302
11303 /* As above, but don't actually build the stub. Just bump offset so
11304 we know stub section sizes, and select plt_branch stubs where
11305 long_branch stubs won't do. */
11306
11307 static bfd_boolean
11308 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11309 {
11310 struct ppc_stub_hash_entry *stub_entry;
11311 struct bfd_link_info *info;
11312 struct ppc_link_hash_table *htab;
11313 bfd_vma off;
11314 int size;
11315
11316 /* Massage our args to the form they really have. */
11317 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11318 info = in_arg;
11319
11320 htab = ppc_hash_table (info);
11321 if (htab == NULL)
11322 return FALSE;
11323
11324 if (stub_entry->h != NULL
11325 && stub_entry->h->save_res
11326 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11327 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11328 {
11329 /* Don't make stubs to out-of-line register save/restore
11330 functions. Instead, emit copies of the functions. */
11331 stub_entry->group->needs_save_res = 1;
11332 stub_entry->stub_type = ppc_stub_save_res;
11333 return TRUE;
11334 }
11335
11336 if (stub_entry->stub_type == ppc_stub_plt_call
11337 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11338 {
11339 asection *plt;
11340 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11341 if (off >= (bfd_vma) -2)
11342 abort ();
11343 plt = htab->elf.splt;
11344 if (!htab->elf.dynamic_sections_created
11345 || stub_entry->h == NULL
11346 || stub_entry->h->elf.dynindx == -1)
11347 plt = htab->elf.iplt;
11348 off += (plt->output_offset
11349 + plt->output_section->vma
11350 - elf_gp (plt->output_section->owner)
11351 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11352
11353 size = plt_stub_size (htab, stub_entry, off);
11354 if (htab->params->plt_stub_align)
11355 size += plt_stub_pad (htab, stub_entry, off);
11356 if (info->emitrelocations)
11357 {
11358 stub_entry->group->stub_sec->reloc_count
11359 += ((PPC_HA (off) != 0)
11360 + (htab->opd_abi
11361 ? 2 + (htab->params->plt_static_chain
11362 && PPC_HA (off + 16) == PPC_HA (off))
11363 : 1));
11364 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11365 }
11366 }
11367 else
11368 {
11369 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11370 variants. */
11371 bfd_vma r2off = 0;
11372 bfd_vma local_off = 0;
11373
11374 off = (stub_entry->target_value
11375 + stub_entry->target_section->output_offset
11376 + stub_entry->target_section->output_section->vma);
11377 off -= (stub_entry->group->stub_sec->size
11378 + stub_entry->group->stub_sec->output_offset
11379 + stub_entry->group->stub_sec->output_section->vma);
11380
11381 /* Reset the stub type from the plt variant in case we now
11382 can reach with a shorter stub. */
11383 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11384 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11385
11386 size = 4;
11387 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11388 {
11389 r2off = get_r2off (info, stub_entry);
11390 if (r2off == (bfd_vma) -1)
11391 {
11392 htab->stub_error = TRUE;
11393 return FALSE;
11394 }
11395 size = 8;
11396 if (PPC_HA (r2off) != 0)
11397 size += 4;
11398 if (PPC_LO (r2off) != 0)
11399 size += 4;
11400 off -= size - 4;
11401 }
11402
11403 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11404
11405 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11406 Do the same for -R objects without function descriptors. */
11407 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11408 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11409 && r2off == 0
11410 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11411 {
11412 struct ppc_branch_hash_entry *br_entry;
11413
11414 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11415 stub_entry->root.string + 9,
11416 TRUE, FALSE);
11417 if (br_entry == NULL)
11418 {
11419 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11420 stub_entry->root.string);
11421 htab->stub_error = TRUE;
11422 return FALSE;
11423 }
11424
11425 if (br_entry->iter != htab->stub_iteration)
11426 {
11427 br_entry->iter = htab->stub_iteration;
11428 br_entry->offset = htab->brlt->size;
11429 htab->brlt->size += 8;
11430
11431 if (htab->relbrlt != NULL)
11432 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11433 else if (info->emitrelocations)
11434 {
11435 htab->brlt->reloc_count += 1;
11436 htab->brlt->flags |= SEC_RELOC;
11437 }
11438 }
11439
11440 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11441 off = (br_entry->offset
11442 + htab->brlt->output_offset
11443 + htab->brlt->output_section->vma
11444 - elf_gp (htab->brlt->output_section->owner)
11445 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11446
11447 if (info->emitrelocations)
11448 {
11449 stub_entry->group->stub_sec->reloc_count
11450 += 1 + (PPC_HA (off) != 0);
11451 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11452 }
11453
11454 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11455 {
11456 size = 12;
11457 if (PPC_HA (off) != 0)
11458 size = 16;
11459 }
11460 else
11461 {
11462 size = 16;
11463 if (PPC_HA (off) != 0)
11464 size += 4;
11465
11466 if (PPC_HA (r2off) != 0)
11467 size += 4;
11468 if (PPC_LO (r2off) != 0)
11469 size += 4;
11470 }
11471 }
11472 else if (info->emitrelocations)
11473 {
11474 stub_entry->group->stub_sec->reloc_count += 1;
11475 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11476 }
11477 }
11478
11479 stub_entry->group->stub_sec->size += size;
11480 return TRUE;
11481 }
11482
11483 /* Set up various things so that we can make a list of input sections
11484 for each output section included in the link. Returns -1 on error,
11485 0 when no stubs will be needed, and 1 on success. */
11486
11487 int
11488 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11489 {
11490 unsigned int id;
11491 bfd_size_type amt;
11492 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11493
11494 if (htab == NULL)
11495 return -1;
11496
11497 htab->sec_info_arr_size = bfd_get_next_section_id ();
11498 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11499 htab->sec_info = bfd_zmalloc (amt);
11500 if (htab->sec_info == NULL)
11501 return -1;
11502
11503 /* Set toc_off for com, und, abs and ind sections. */
11504 for (id = 0; id < 3; id++)
11505 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11506
11507 return 1;
11508 }
11509
11510 /* Set up for first pass at multitoc partitioning. */
11511
11512 void
11513 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11514 {
11515 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11516
11517 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11518 htab->toc_bfd = NULL;
11519 htab->toc_first_sec = NULL;
11520 }
11521
11522 /* The linker repeatedly calls this function for each TOC input section
11523 and linker generated GOT section. Group input bfds such that the toc
11524 within a group is less than 64k in size. */
11525
11526 bfd_boolean
11527 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11528 {
11529 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11530 bfd_vma addr, off, limit;
11531
11532 if (htab == NULL)
11533 return FALSE;
11534
11535 if (!htab->second_toc_pass)
11536 {
11537 /* Keep track of the first .toc or .got section for this input bfd. */
11538 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11539
11540 if (new_bfd)
11541 {
11542 htab->toc_bfd = isec->owner;
11543 htab->toc_first_sec = isec;
11544 }
11545
11546 addr = isec->output_offset + isec->output_section->vma;
11547 off = addr - htab->toc_curr;
11548 limit = 0x80008000;
11549 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11550 limit = 0x10000;
11551 if (off + isec->size > limit)
11552 {
11553 addr = (htab->toc_first_sec->output_offset
11554 + htab->toc_first_sec->output_section->vma);
11555 htab->toc_curr = addr;
11556 htab->toc_curr &= -TOC_BASE_ALIGN;
11557 }
11558
11559 /* toc_curr is the base address of this toc group. Set elf_gp
11560 for the input section to be the offset relative to the
11561 output toc base plus 0x8000. Making the input elf_gp an
11562 offset allows us to move the toc as a whole without
11563 recalculating input elf_gp. */
11564 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11565 off += TOC_BASE_OFF;
11566
11567 /* Die if someone uses a linker script that doesn't keep input
11568 file .toc and .got together. */
11569 if (new_bfd
11570 && elf_gp (isec->owner) != 0
11571 && elf_gp (isec->owner) != off)
11572 return FALSE;
11573
11574 elf_gp (isec->owner) = off;
11575 return TRUE;
11576 }
11577
11578 /* During the second pass toc_first_sec points to the start of
11579 a toc group, and toc_curr is used to track the old elf_gp.
11580 We use toc_bfd to ensure we only look at each bfd once. */
11581 if (htab->toc_bfd == isec->owner)
11582 return TRUE;
11583 htab->toc_bfd = isec->owner;
11584
11585 if (htab->toc_first_sec == NULL
11586 || htab->toc_curr != elf_gp (isec->owner))
11587 {
11588 htab->toc_curr = elf_gp (isec->owner);
11589 htab->toc_first_sec = isec;
11590 }
11591 addr = (htab->toc_first_sec->output_offset
11592 + htab->toc_first_sec->output_section->vma);
11593 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11594 elf_gp (isec->owner) = off;
11595
11596 return TRUE;
11597 }
11598
11599 /* Called via elf_link_hash_traverse to merge GOT entries for global
11600 symbol H. */
11601
11602 static bfd_boolean
11603 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11604 {
11605 if (h->root.type == bfd_link_hash_indirect)
11606 return TRUE;
11607
11608 merge_got_entries (&h->got.glist);
11609
11610 return TRUE;
11611 }
11612
11613 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11614 symbol H. */
11615
11616 static bfd_boolean
11617 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11618 {
11619 struct got_entry *gent;
11620
11621 if (h->root.type == bfd_link_hash_indirect)
11622 return TRUE;
11623
11624 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11625 if (!gent->is_indirect)
11626 allocate_got (h, (struct bfd_link_info *) inf, gent);
11627 return TRUE;
11628 }
11629
11630 /* Called on the first multitoc pass after the last call to
11631 ppc64_elf_next_toc_section. This function removes duplicate GOT
11632 entries. */
11633
11634 bfd_boolean
11635 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11636 {
11637 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11638 struct bfd *ibfd, *ibfd2;
11639 bfd_boolean done_something;
11640
11641 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11642
11643 if (!htab->do_multi_toc)
11644 return FALSE;
11645
11646 /* Merge global sym got entries within a toc group. */
11647 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11648
11649 /* And tlsld_got. */
11650 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11651 {
11652 struct got_entry *ent, *ent2;
11653
11654 if (!is_ppc64_elf (ibfd))
11655 continue;
11656
11657 ent = ppc64_tlsld_got (ibfd);
11658 if (!ent->is_indirect
11659 && ent->got.offset != (bfd_vma) -1)
11660 {
11661 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11662 {
11663 if (!is_ppc64_elf (ibfd2))
11664 continue;
11665
11666 ent2 = ppc64_tlsld_got (ibfd2);
11667 if (!ent2->is_indirect
11668 && ent2->got.offset != (bfd_vma) -1
11669 && elf_gp (ibfd2) == elf_gp (ibfd))
11670 {
11671 ent2->is_indirect = TRUE;
11672 ent2->got.ent = ent;
11673 }
11674 }
11675 }
11676 }
11677
11678 /* Zap sizes of got sections. */
11679 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11680 htab->elf.irelplt->size -= htab->got_reli_size;
11681 htab->got_reli_size = 0;
11682
11683 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11684 {
11685 asection *got, *relgot;
11686
11687 if (!is_ppc64_elf (ibfd))
11688 continue;
11689
11690 got = ppc64_elf_tdata (ibfd)->got;
11691 if (got != NULL)
11692 {
11693 got->rawsize = got->size;
11694 got->size = 0;
11695 relgot = ppc64_elf_tdata (ibfd)->relgot;
11696 relgot->rawsize = relgot->size;
11697 relgot->size = 0;
11698 }
11699 }
11700
11701 /* Now reallocate the got, local syms first. We don't need to
11702 allocate section contents again since we never increase size. */
11703 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11704 {
11705 struct got_entry **lgot_ents;
11706 struct got_entry **end_lgot_ents;
11707 struct plt_entry **local_plt;
11708 struct plt_entry **end_local_plt;
11709 unsigned char *lgot_masks;
11710 bfd_size_type locsymcount;
11711 Elf_Internal_Shdr *symtab_hdr;
11712 asection *s;
11713
11714 if (!is_ppc64_elf (ibfd))
11715 continue;
11716
11717 lgot_ents = elf_local_got_ents (ibfd);
11718 if (!lgot_ents)
11719 continue;
11720
11721 symtab_hdr = &elf_symtab_hdr (ibfd);
11722 locsymcount = symtab_hdr->sh_info;
11723 end_lgot_ents = lgot_ents + locsymcount;
11724 local_plt = (struct plt_entry **) end_lgot_ents;
11725 end_local_plt = local_plt + locsymcount;
11726 lgot_masks = (unsigned char *) end_local_plt;
11727 s = ppc64_elf_tdata (ibfd)->got;
11728 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11729 {
11730 struct got_entry *ent;
11731
11732 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11733 {
11734 unsigned int ent_size = 8;
11735 unsigned int rel_size = sizeof (Elf64_External_Rela);
11736
11737 ent->got.offset = s->size;
11738 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11739 {
11740 ent_size *= 2;
11741 rel_size *= 2;
11742 }
11743 s->size += ent_size;
11744 if ((*lgot_masks & PLT_IFUNC) != 0)
11745 {
11746 htab->elf.irelplt->size += rel_size;
11747 htab->got_reli_size += rel_size;
11748 }
11749 else if (bfd_link_pic (info))
11750 {
11751 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11752 srel->size += rel_size;
11753 }
11754 }
11755 }
11756 }
11757
11758 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11759
11760 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11761 {
11762 struct got_entry *ent;
11763
11764 if (!is_ppc64_elf (ibfd))
11765 continue;
11766
11767 ent = ppc64_tlsld_got (ibfd);
11768 if (!ent->is_indirect
11769 && ent->got.offset != (bfd_vma) -1)
11770 {
11771 asection *s = ppc64_elf_tdata (ibfd)->got;
11772 ent->got.offset = s->size;
11773 s->size += 16;
11774 if (bfd_link_pic (info))
11775 {
11776 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11777 srel->size += sizeof (Elf64_External_Rela);
11778 }
11779 }
11780 }
11781
11782 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11783 if (!done_something)
11784 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11785 {
11786 asection *got;
11787
11788 if (!is_ppc64_elf (ibfd))
11789 continue;
11790
11791 got = ppc64_elf_tdata (ibfd)->got;
11792 if (got != NULL)
11793 {
11794 done_something = got->rawsize != got->size;
11795 if (done_something)
11796 break;
11797 }
11798 }
11799
11800 if (done_something)
11801 (*htab->params->layout_sections_again) ();
11802
11803 /* Set up for second pass over toc sections to recalculate elf_gp
11804 on input sections. */
11805 htab->toc_bfd = NULL;
11806 htab->toc_first_sec = NULL;
11807 htab->second_toc_pass = TRUE;
11808 return done_something;
11809 }
11810
11811 /* Called after second pass of multitoc partitioning. */
11812
11813 void
11814 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11815 {
11816 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11817
11818 /* After the second pass, toc_curr tracks the TOC offset used
11819 for code sections below in ppc64_elf_next_input_section. */
11820 htab->toc_curr = TOC_BASE_OFF;
11821 }
11822
11823 /* No toc references were found in ISEC. If the code in ISEC makes no
11824 calls, then there's no need to use toc adjusting stubs when branching
11825 into ISEC. Actually, indirect calls from ISEC are OK as they will
11826 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11827 needed, and 2 if a cyclical call-graph was found but no other reason
11828 for a stub was detected. If called from the top level, a return of
11829 2 means the same as a return of 0. */
11830
11831 static int
11832 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11833 {
11834 int ret;
11835
11836 /* Mark this section as checked. */
11837 isec->call_check_done = 1;
11838
11839 /* We know none of our code bearing sections will need toc stubs. */
11840 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11841 return 0;
11842
11843 if (isec->size == 0)
11844 return 0;
11845
11846 if (isec->output_section == NULL)
11847 return 0;
11848
11849 ret = 0;
11850 if (isec->reloc_count != 0)
11851 {
11852 Elf_Internal_Rela *relstart, *rel;
11853 Elf_Internal_Sym *local_syms;
11854 struct ppc_link_hash_table *htab;
11855
11856 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11857 info->keep_memory);
11858 if (relstart == NULL)
11859 return -1;
11860
11861 /* Look for branches to outside of this section. */
11862 local_syms = NULL;
11863 htab = ppc_hash_table (info);
11864 if (htab == NULL)
11865 return -1;
11866
11867 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11868 {
11869 enum elf_ppc64_reloc_type r_type;
11870 unsigned long r_symndx;
11871 struct elf_link_hash_entry *h;
11872 struct ppc_link_hash_entry *eh;
11873 Elf_Internal_Sym *sym;
11874 asection *sym_sec;
11875 struct _opd_sec_data *opd;
11876 bfd_vma sym_value;
11877 bfd_vma dest;
11878
11879 r_type = ELF64_R_TYPE (rel->r_info);
11880 if (r_type != R_PPC64_REL24
11881 && r_type != R_PPC64_REL14
11882 && r_type != R_PPC64_REL14_BRTAKEN
11883 && r_type != R_PPC64_REL14_BRNTAKEN)
11884 continue;
11885
11886 r_symndx = ELF64_R_SYM (rel->r_info);
11887 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11888 isec->owner))
11889 {
11890 ret = -1;
11891 break;
11892 }
11893
11894 /* Calls to dynamic lib functions go through a plt call stub
11895 that uses r2. */
11896 eh = (struct ppc_link_hash_entry *) h;
11897 if (eh != NULL
11898 && (eh->elf.plt.plist != NULL
11899 || (eh->oh != NULL
11900 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11901 {
11902 ret = 1;
11903 break;
11904 }
11905
11906 if (sym_sec == NULL)
11907 /* Ignore other undefined symbols. */
11908 continue;
11909
11910 /* Assume branches to other sections not included in the
11911 link need stubs too, to cover -R and absolute syms. */
11912 if (sym_sec->output_section == NULL)
11913 {
11914 ret = 1;
11915 break;
11916 }
11917
11918 if (h == NULL)
11919 sym_value = sym->st_value;
11920 else
11921 {
11922 if (h->root.type != bfd_link_hash_defined
11923 && h->root.type != bfd_link_hash_defweak)
11924 abort ();
11925 sym_value = h->root.u.def.value;
11926 }
11927 sym_value += rel->r_addend;
11928
11929 /* If this branch reloc uses an opd sym, find the code section. */
11930 opd = get_opd_info (sym_sec);
11931 if (opd != NULL)
11932 {
11933 if (h == NULL && opd->adjust != NULL)
11934 {
11935 long adjust;
11936
11937 adjust = opd->adjust[OPD_NDX (sym_value)];
11938 if (adjust == -1)
11939 /* Assume deleted functions won't ever be called. */
11940 continue;
11941 sym_value += adjust;
11942 }
11943
11944 dest = opd_entry_value (sym_sec, sym_value,
11945 &sym_sec, NULL, FALSE);
11946 if (dest == (bfd_vma) -1)
11947 continue;
11948 }
11949 else
11950 dest = (sym_value
11951 + sym_sec->output_offset
11952 + sym_sec->output_section->vma);
11953
11954 /* Ignore branch to self. */
11955 if (sym_sec == isec)
11956 continue;
11957
11958 /* If the called function uses the toc, we need a stub. */
11959 if (sym_sec->has_toc_reloc
11960 || sym_sec->makes_toc_func_call)
11961 {
11962 ret = 1;
11963 break;
11964 }
11965
11966 /* Assume any branch that needs a long branch stub might in fact
11967 need a plt_branch stub. A plt_branch stub uses r2. */
11968 else if (dest - (isec->output_offset
11969 + isec->output_section->vma
11970 + rel->r_offset) + (1 << 25)
11971 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11972 ? h->other
11973 : sym->st_other))
11974 {
11975 ret = 1;
11976 break;
11977 }
11978
11979 /* If calling back to a section in the process of being
11980 tested, we can't say for sure that no toc adjusting stubs
11981 are needed, so don't return zero. */
11982 else if (sym_sec->call_check_in_progress)
11983 ret = 2;
11984
11985 /* Branches to another section that itself doesn't have any TOC
11986 references are OK. Recursively call ourselves to check. */
11987 else if (!sym_sec->call_check_done)
11988 {
11989 int recur;
11990
11991 /* Mark current section as indeterminate, so that other
11992 sections that call back to current won't be marked as
11993 known. */
11994 isec->call_check_in_progress = 1;
11995 recur = toc_adjusting_stub_needed (info, sym_sec);
11996 isec->call_check_in_progress = 0;
11997
11998 if (recur != 0)
11999 {
12000 ret = recur;
12001 if (recur != 2)
12002 break;
12003 }
12004 }
12005 }
12006
12007 if (local_syms != NULL
12008 && (elf_symtab_hdr (isec->owner).contents
12009 != (unsigned char *) local_syms))
12010 free (local_syms);
12011 if (elf_section_data (isec)->relocs != relstart)
12012 free (relstart);
12013 }
12014
12015 if ((ret & 1) == 0
12016 && isec->map_head.s != NULL
12017 && (strcmp (isec->output_section->name, ".init") == 0
12018 || strcmp (isec->output_section->name, ".fini") == 0))
12019 {
12020 if (isec->map_head.s->has_toc_reloc
12021 || isec->map_head.s->makes_toc_func_call)
12022 ret = 1;
12023 else if (!isec->map_head.s->call_check_done)
12024 {
12025 int recur;
12026 isec->call_check_in_progress = 1;
12027 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12028 isec->call_check_in_progress = 0;
12029 if (recur != 0)
12030 ret = recur;
12031 }
12032 }
12033
12034 if (ret == 1)
12035 isec->makes_toc_func_call = 1;
12036
12037 return ret;
12038 }
12039
12040 /* The linker repeatedly calls this function for each input section,
12041 in the order that input sections are linked into output sections.
12042 Build lists of input sections to determine groupings between which
12043 we may insert linker stubs. */
12044
12045 bfd_boolean
12046 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12047 {
12048 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12049
12050 if (htab == NULL)
12051 return FALSE;
12052
12053 if ((isec->output_section->flags & SEC_CODE) != 0
12054 && isec->output_section->id < htab->sec_info_arr_size)
12055 {
12056 /* This happens to make the list in reverse order,
12057 which is what we want. */
12058 htab->sec_info[isec->id].u.list
12059 = htab->sec_info[isec->output_section->id].u.list;
12060 htab->sec_info[isec->output_section->id].u.list = isec;
12061 }
12062
12063 if (htab->multi_toc_needed)
12064 {
12065 /* Analyse sections that aren't already flagged as needing a
12066 valid toc pointer. Exclude .fixup for the linux kernel.
12067 .fixup contains branches, but only back to the function that
12068 hit an exception. */
12069 if (!(isec->has_toc_reloc
12070 || (isec->flags & SEC_CODE) == 0
12071 || strcmp (isec->name, ".fixup") == 0
12072 || isec->call_check_done))
12073 {
12074 if (toc_adjusting_stub_needed (info, isec) < 0)
12075 return FALSE;
12076 }
12077 /* Make all sections use the TOC assigned for this object file.
12078 This will be wrong for pasted sections; We fix that in
12079 check_pasted_section(). */
12080 if (elf_gp (isec->owner) != 0)
12081 htab->toc_curr = elf_gp (isec->owner);
12082 }
12083
12084 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12085 return TRUE;
12086 }
12087
12088 /* Check that all .init and .fini sections use the same toc, if they
12089 have toc relocs. */
12090
12091 static bfd_boolean
12092 check_pasted_section (struct bfd_link_info *info, const char *name)
12093 {
12094 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12095
12096 if (o != NULL)
12097 {
12098 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12099 bfd_vma toc_off = 0;
12100 asection *i;
12101
12102 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12103 if (i->has_toc_reloc)
12104 {
12105 if (toc_off == 0)
12106 toc_off = htab->sec_info[i->id].toc_off;
12107 else if (toc_off != htab->sec_info[i->id].toc_off)
12108 return FALSE;
12109 }
12110
12111 if (toc_off == 0)
12112 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12113 if (i->makes_toc_func_call)
12114 {
12115 toc_off = htab->sec_info[i->id].toc_off;
12116 break;
12117 }
12118
12119 /* Make sure the whole pasted function uses the same toc offset. */
12120 if (toc_off != 0)
12121 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12122 htab->sec_info[i->id].toc_off = toc_off;
12123 }
12124 return TRUE;
12125 }
12126
12127 bfd_boolean
12128 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12129 {
12130 return (check_pasted_section (info, ".init")
12131 & check_pasted_section (info, ".fini"));
12132 }
12133
12134 /* See whether we can group stub sections together. Grouping stub
12135 sections may result in fewer stubs. More importantly, we need to
12136 put all .init* and .fini* stubs at the beginning of the .init or
12137 .fini output sections respectively, because glibc splits the
12138 _init and _fini functions into multiple parts. Putting a stub in
12139 the middle of a function is not a good idea. */
12140
12141 static bfd_boolean
12142 group_sections (struct bfd_link_info *info,
12143 bfd_size_type stub_group_size,
12144 bfd_boolean stubs_always_before_branch)
12145 {
12146 struct ppc_link_hash_table *htab;
12147 asection *osec;
12148 bfd_boolean suppress_size_errors;
12149
12150 htab = ppc_hash_table (info);
12151 if (htab == NULL)
12152 return FALSE;
12153
12154 suppress_size_errors = FALSE;
12155 if (stub_group_size == 1)
12156 {
12157 /* Default values. */
12158 if (stubs_always_before_branch)
12159 stub_group_size = 0x1e00000;
12160 else
12161 stub_group_size = 0x1c00000;
12162 suppress_size_errors = TRUE;
12163 }
12164
12165 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12166 {
12167 asection *tail;
12168
12169 if (osec->id >= htab->sec_info_arr_size)
12170 continue;
12171
12172 tail = htab->sec_info[osec->id].u.list;
12173 while (tail != NULL)
12174 {
12175 asection *curr;
12176 asection *prev;
12177 bfd_size_type total;
12178 bfd_boolean big_sec;
12179 bfd_vma curr_toc;
12180 struct map_stub *group;
12181 bfd_size_type group_size;
12182
12183 curr = tail;
12184 total = tail->size;
12185 group_size = (ppc64_elf_section_data (tail) != NULL
12186 && ppc64_elf_section_data (tail)->has_14bit_branch
12187 ? stub_group_size >> 10 : stub_group_size);
12188
12189 big_sec = total > group_size;
12190 if (big_sec && !suppress_size_errors)
12191 /* xgettext:c-format */
12192 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12193 tail->owner, tail);
12194 curr_toc = htab->sec_info[tail->id].toc_off;
12195
12196 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12197 && ((total += curr->output_offset - prev->output_offset)
12198 < (ppc64_elf_section_data (prev) != NULL
12199 && ppc64_elf_section_data (prev)->has_14bit_branch
12200 ? (group_size = stub_group_size >> 10) : group_size))
12201 && htab->sec_info[prev->id].toc_off == curr_toc)
12202 curr = prev;
12203
12204 /* OK, the size from the start of CURR to the end is less
12205 than group_size and thus can be handled by one stub
12206 section. (or the tail section is itself larger than
12207 group_size, in which case we may be toast.) We should
12208 really be keeping track of the total size of stubs added
12209 here, as stubs contribute to the final output section
12210 size. That's a little tricky, and this way will only
12211 break if stubs added make the total size more than 2^25,
12212 ie. for the default stub_group_size, if stubs total more
12213 than 2097152 bytes, or nearly 75000 plt call stubs. */
12214 group = bfd_alloc (curr->owner, sizeof (*group));
12215 if (group == NULL)
12216 return FALSE;
12217 group->link_sec = curr;
12218 group->stub_sec = NULL;
12219 group->needs_save_res = 0;
12220 group->next = htab->group;
12221 htab->group = group;
12222 do
12223 {
12224 prev = htab->sec_info[tail->id].u.list;
12225 /* Set up this stub group. */
12226 htab->sec_info[tail->id].u.group = group;
12227 }
12228 while (tail != curr && (tail = prev) != NULL);
12229
12230 /* But wait, there's more! Input sections up to group_size
12231 bytes before the stub section can be handled by it too.
12232 Don't do this if we have a really large section after the
12233 stubs, as adding more stubs increases the chance that
12234 branches may not reach into the stub section. */
12235 if (!stubs_always_before_branch && !big_sec)
12236 {
12237 total = 0;
12238 while (prev != NULL
12239 && ((total += tail->output_offset - prev->output_offset)
12240 < (ppc64_elf_section_data (prev) != NULL
12241 && ppc64_elf_section_data (prev)->has_14bit_branch
12242 ? (group_size = stub_group_size >> 10) : group_size))
12243 && htab->sec_info[prev->id].toc_off == curr_toc)
12244 {
12245 tail = prev;
12246 prev = htab->sec_info[tail->id].u.list;
12247 htab->sec_info[tail->id].u.group = group;
12248 }
12249 }
12250 tail = prev;
12251 }
12252 }
12253 return TRUE;
12254 }
12255
12256 static const unsigned char glink_eh_frame_cie[] =
12257 {
12258 0, 0, 0, 16, /* length. */
12259 0, 0, 0, 0, /* id. */
12260 1, /* CIE version. */
12261 'z', 'R', 0, /* Augmentation string. */
12262 4, /* Code alignment. */
12263 0x78, /* Data alignment. */
12264 65, /* RA reg. */
12265 1, /* Augmentation size. */
12266 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12267 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12268 };
12269
12270 /* Stripping output sections is normally done before dynamic section
12271 symbols have been allocated. This function is called later, and
12272 handles cases like htab->brlt which is mapped to its own output
12273 section. */
12274
12275 static void
12276 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12277 {
12278 if (isec->size == 0
12279 && isec->output_section->size == 0
12280 && !(isec->output_section->flags & SEC_KEEP)
12281 && !bfd_section_removed_from_list (info->output_bfd,
12282 isec->output_section)
12283 && elf_section_data (isec->output_section)->dynindx == 0)
12284 {
12285 isec->output_section->flags |= SEC_EXCLUDE;
12286 bfd_section_list_remove (info->output_bfd, isec->output_section);
12287 info->output_bfd->section_count--;
12288 }
12289 }
12290
12291 /* Determine and set the size of the stub section for a final link.
12292
12293 The basic idea here is to examine all the relocations looking for
12294 PC-relative calls to a target that is unreachable with a "bl"
12295 instruction. */
12296
12297 bfd_boolean
12298 ppc64_elf_size_stubs (struct bfd_link_info *info)
12299 {
12300 bfd_size_type stub_group_size;
12301 bfd_boolean stubs_always_before_branch;
12302 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12303
12304 if (htab == NULL)
12305 return FALSE;
12306
12307 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12308 htab->params->plt_thread_safe = 1;
12309 if (!htab->opd_abi)
12310 htab->params->plt_thread_safe = 0;
12311 else if (htab->params->plt_thread_safe == -1)
12312 {
12313 static const char *const thread_starter[] =
12314 {
12315 "pthread_create",
12316 /* libstdc++ */
12317 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12318 /* librt */
12319 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12320 "mq_notify", "create_timer",
12321 /* libanl */
12322 "getaddrinfo_a",
12323 /* libgomp */
12324 "GOMP_parallel",
12325 "GOMP_parallel_start",
12326 "GOMP_parallel_loop_static",
12327 "GOMP_parallel_loop_static_start",
12328 "GOMP_parallel_loop_dynamic",
12329 "GOMP_parallel_loop_dynamic_start",
12330 "GOMP_parallel_loop_guided",
12331 "GOMP_parallel_loop_guided_start",
12332 "GOMP_parallel_loop_runtime",
12333 "GOMP_parallel_loop_runtime_start",
12334 "GOMP_parallel_sections",
12335 "GOMP_parallel_sections_start",
12336 /* libgo */
12337 "__go_go",
12338 };
12339 unsigned i;
12340
12341 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12342 {
12343 struct elf_link_hash_entry *h;
12344 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12345 FALSE, FALSE, TRUE);
12346 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12347 if (htab->params->plt_thread_safe)
12348 break;
12349 }
12350 }
12351 stubs_always_before_branch = htab->params->group_size < 0;
12352 if (htab->params->group_size < 0)
12353 stub_group_size = -htab->params->group_size;
12354 else
12355 stub_group_size = htab->params->group_size;
12356
12357 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12358 return FALSE;
12359
12360 #define STUB_SHRINK_ITER 20
12361 /* Loop until no stubs added. After iteration 20 of this loop we may
12362 exit on a stub section shrinking. This is to break out of a
12363 pathological case where adding stubs on one iteration decreases
12364 section gaps (perhaps due to alignment), which then requires
12365 fewer or smaller stubs on the next iteration. */
12366
12367 while (1)
12368 {
12369 bfd *input_bfd;
12370 unsigned int bfd_indx;
12371 struct map_stub *group;
12372 asection *stub_sec;
12373
12374 htab->stub_iteration += 1;
12375
12376 for (input_bfd = info->input_bfds, bfd_indx = 0;
12377 input_bfd != NULL;
12378 input_bfd = input_bfd->link.next, bfd_indx++)
12379 {
12380 Elf_Internal_Shdr *symtab_hdr;
12381 asection *section;
12382 Elf_Internal_Sym *local_syms = NULL;
12383
12384 if (!is_ppc64_elf (input_bfd))
12385 continue;
12386
12387 /* We'll need the symbol table in a second. */
12388 symtab_hdr = &elf_symtab_hdr (input_bfd);
12389 if (symtab_hdr->sh_info == 0)
12390 continue;
12391
12392 /* Walk over each section attached to the input bfd. */
12393 for (section = input_bfd->sections;
12394 section != NULL;
12395 section = section->next)
12396 {
12397 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12398
12399 /* If there aren't any relocs, then there's nothing more
12400 to do. */
12401 if ((section->flags & SEC_RELOC) == 0
12402 || (section->flags & SEC_ALLOC) == 0
12403 || (section->flags & SEC_LOAD) == 0
12404 || (section->flags & SEC_CODE) == 0
12405 || section->reloc_count == 0)
12406 continue;
12407
12408 /* If this section is a link-once section that will be
12409 discarded, then don't create any stubs. */
12410 if (section->output_section == NULL
12411 || section->output_section->owner != info->output_bfd)
12412 continue;
12413
12414 /* Get the relocs. */
12415 internal_relocs
12416 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12417 info->keep_memory);
12418 if (internal_relocs == NULL)
12419 goto error_ret_free_local;
12420
12421 /* Now examine each relocation. */
12422 irela = internal_relocs;
12423 irelaend = irela + section->reloc_count;
12424 for (; irela < irelaend; irela++)
12425 {
12426 enum elf_ppc64_reloc_type r_type;
12427 unsigned int r_indx;
12428 enum ppc_stub_type stub_type;
12429 struct ppc_stub_hash_entry *stub_entry;
12430 asection *sym_sec, *code_sec;
12431 bfd_vma sym_value, code_value;
12432 bfd_vma destination;
12433 unsigned long local_off;
12434 bfd_boolean ok_dest;
12435 struct ppc_link_hash_entry *hash;
12436 struct ppc_link_hash_entry *fdh;
12437 struct elf_link_hash_entry *h;
12438 Elf_Internal_Sym *sym;
12439 char *stub_name;
12440 const asection *id_sec;
12441 struct _opd_sec_data *opd;
12442 struct plt_entry *plt_ent;
12443
12444 r_type = ELF64_R_TYPE (irela->r_info);
12445 r_indx = ELF64_R_SYM (irela->r_info);
12446
12447 if (r_type >= R_PPC64_max)
12448 {
12449 bfd_set_error (bfd_error_bad_value);
12450 goto error_ret_free_internal;
12451 }
12452
12453 /* Only look for stubs on branch instructions. */
12454 if (r_type != R_PPC64_REL24
12455 && r_type != R_PPC64_REL14
12456 && r_type != R_PPC64_REL14_BRTAKEN
12457 && r_type != R_PPC64_REL14_BRNTAKEN)
12458 continue;
12459
12460 /* Now determine the call target, its name, value,
12461 section. */
12462 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12463 r_indx, input_bfd))
12464 goto error_ret_free_internal;
12465 hash = (struct ppc_link_hash_entry *) h;
12466
12467 ok_dest = FALSE;
12468 fdh = NULL;
12469 sym_value = 0;
12470 if (hash == NULL)
12471 {
12472 sym_value = sym->st_value;
12473 if (sym_sec != NULL
12474 && sym_sec->output_section != NULL)
12475 ok_dest = TRUE;
12476 }
12477 else if (hash->elf.root.type == bfd_link_hash_defined
12478 || hash->elf.root.type == bfd_link_hash_defweak)
12479 {
12480 sym_value = hash->elf.root.u.def.value;
12481 if (sym_sec->output_section != NULL)
12482 ok_dest = TRUE;
12483 }
12484 else if (hash->elf.root.type == bfd_link_hash_undefweak
12485 || hash->elf.root.type == bfd_link_hash_undefined)
12486 {
12487 /* Recognise an old ABI func code entry sym, and
12488 use the func descriptor sym instead if it is
12489 defined. */
12490 if (hash->elf.root.root.string[0] == '.'
12491 && hash->oh != NULL)
12492 {
12493 fdh = ppc_follow_link (hash->oh);
12494 if (fdh->elf.root.type == bfd_link_hash_defined
12495 || fdh->elf.root.type == bfd_link_hash_defweak)
12496 {
12497 sym_sec = fdh->elf.root.u.def.section;
12498 sym_value = fdh->elf.root.u.def.value;
12499 if (sym_sec->output_section != NULL)
12500 ok_dest = TRUE;
12501 }
12502 else
12503 fdh = NULL;
12504 }
12505 }
12506 else
12507 {
12508 bfd_set_error (bfd_error_bad_value);
12509 goto error_ret_free_internal;
12510 }
12511
12512 destination = 0;
12513 local_off = 0;
12514 if (ok_dest)
12515 {
12516 sym_value += irela->r_addend;
12517 destination = (sym_value
12518 + sym_sec->output_offset
12519 + sym_sec->output_section->vma);
12520 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12521 ? hash->elf.other
12522 : sym->st_other);
12523 }
12524
12525 code_sec = sym_sec;
12526 code_value = sym_value;
12527 opd = get_opd_info (sym_sec);
12528 if (opd != NULL)
12529 {
12530 bfd_vma dest;
12531
12532 if (hash == NULL && opd->adjust != NULL)
12533 {
12534 long adjust = opd->adjust[OPD_NDX (sym_value)];
12535 if (adjust == -1)
12536 continue;
12537 code_value += adjust;
12538 sym_value += adjust;
12539 }
12540 dest = opd_entry_value (sym_sec, sym_value,
12541 &code_sec, &code_value, FALSE);
12542 if (dest != (bfd_vma) -1)
12543 {
12544 destination = dest;
12545 if (fdh != NULL)
12546 {
12547 /* Fixup old ABI sym to point at code
12548 entry. */
12549 hash->elf.root.type = bfd_link_hash_defweak;
12550 hash->elf.root.u.def.section = code_sec;
12551 hash->elf.root.u.def.value = code_value;
12552 }
12553 }
12554 }
12555
12556 /* Determine what (if any) linker stub is needed. */
12557 plt_ent = NULL;
12558 stub_type = ppc_type_of_stub (section, irela, &hash,
12559 &plt_ent, destination,
12560 local_off);
12561
12562 if (stub_type != ppc_stub_plt_call)
12563 {
12564 /* Check whether we need a TOC adjusting stub.
12565 Since the linker pastes together pieces from
12566 different object files when creating the
12567 _init and _fini functions, it may be that a
12568 call to what looks like a local sym is in
12569 fact a call needing a TOC adjustment. */
12570 if (code_sec != NULL
12571 && code_sec->output_section != NULL
12572 && (htab->sec_info[code_sec->id].toc_off
12573 != htab->sec_info[section->id].toc_off)
12574 && (code_sec->has_toc_reloc
12575 || code_sec->makes_toc_func_call))
12576 stub_type = ppc_stub_long_branch_r2off;
12577 }
12578
12579 if (stub_type == ppc_stub_none)
12580 continue;
12581
12582 /* __tls_get_addr calls might be eliminated. */
12583 if (stub_type != ppc_stub_plt_call
12584 && hash != NULL
12585 && (hash == htab->tls_get_addr
12586 || hash == htab->tls_get_addr_fd)
12587 && section->has_tls_reloc
12588 && irela != internal_relocs)
12589 {
12590 /* Get tls info. */
12591 unsigned char *tls_mask;
12592
12593 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12594 irela - 1, input_bfd))
12595 goto error_ret_free_internal;
12596 if (*tls_mask != 0)
12597 continue;
12598 }
12599
12600 if (stub_type == ppc_stub_plt_call
12601 && irela + 1 < irelaend
12602 && irela[1].r_offset == irela->r_offset + 4
12603 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12604 {
12605 if (!tocsave_find (htab, INSERT,
12606 &local_syms, irela + 1, input_bfd))
12607 goto error_ret_free_internal;
12608 }
12609 else if (stub_type == ppc_stub_plt_call)
12610 stub_type = ppc_stub_plt_call_r2save;
12611
12612 /* Support for grouping stub sections. */
12613 id_sec = htab->sec_info[section->id].u.group->link_sec;
12614
12615 /* Get the name of this stub. */
12616 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12617 if (!stub_name)
12618 goto error_ret_free_internal;
12619
12620 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12621 stub_name, FALSE, FALSE);
12622 if (stub_entry != NULL)
12623 {
12624 /* The proper stub has already been created. */
12625 free (stub_name);
12626 if (stub_type == ppc_stub_plt_call_r2save)
12627 stub_entry->stub_type = stub_type;
12628 continue;
12629 }
12630
12631 stub_entry = ppc_add_stub (stub_name, section, info);
12632 if (stub_entry == NULL)
12633 {
12634 free (stub_name);
12635 error_ret_free_internal:
12636 if (elf_section_data (section)->relocs == NULL)
12637 free (internal_relocs);
12638 error_ret_free_local:
12639 if (local_syms != NULL
12640 && (symtab_hdr->contents
12641 != (unsigned char *) local_syms))
12642 free (local_syms);
12643 return FALSE;
12644 }
12645
12646 stub_entry->stub_type = stub_type;
12647 if (stub_type != ppc_stub_plt_call
12648 && stub_type != ppc_stub_plt_call_r2save)
12649 {
12650 stub_entry->target_value = code_value;
12651 stub_entry->target_section = code_sec;
12652 }
12653 else
12654 {
12655 stub_entry->target_value = sym_value;
12656 stub_entry->target_section = sym_sec;
12657 }
12658 stub_entry->h = hash;
12659 stub_entry->plt_ent = plt_ent;
12660 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12661
12662 if (stub_entry->h != NULL)
12663 htab->stub_globals += 1;
12664 }
12665
12666 /* We're done with the internal relocs, free them. */
12667 if (elf_section_data (section)->relocs != internal_relocs)
12668 free (internal_relocs);
12669 }
12670
12671 if (local_syms != NULL
12672 && symtab_hdr->contents != (unsigned char *) local_syms)
12673 {
12674 if (!info->keep_memory)
12675 free (local_syms);
12676 else
12677 symtab_hdr->contents = (unsigned char *) local_syms;
12678 }
12679 }
12680
12681 /* We may have added some stubs. Find out the new size of the
12682 stub sections. */
12683 for (stub_sec = htab->params->stub_bfd->sections;
12684 stub_sec != NULL;
12685 stub_sec = stub_sec->next)
12686 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12687 {
12688 if (htab->stub_iteration <= STUB_SHRINK_ITER
12689 || stub_sec->rawsize < stub_sec->size)
12690 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12691 stub_sec->rawsize = stub_sec->size;
12692 stub_sec->size = 0;
12693 stub_sec->reloc_count = 0;
12694 stub_sec->flags &= ~SEC_RELOC;
12695 }
12696
12697 htab->brlt->size = 0;
12698 htab->brlt->reloc_count = 0;
12699 htab->brlt->flags &= ~SEC_RELOC;
12700 if (htab->relbrlt != NULL)
12701 htab->relbrlt->size = 0;
12702
12703 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12704
12705 for (group = htab->group; group != NULL; group = group->next)
12706 if (group->needs_save_res)
12707 group->stub_sec->size += htab->sfpr->size;
12708
12709 if (info->emitrelocations
12710 && htab->glink != NULL && htab->glink->size != 0)
12711 {
12712 htab->glink->reloc_count = 1;
12713 htab->glink->flags |= SEC_RELOC;
12714 }
12715
12716 if (htab->glink_eh_frame != NULL
12717 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12718 && htab->glink_eh_frame->output_section->size != 0)
12719 {
12720 size_t size = 0, align = 4;
12721
12722 for (stub_sec = htab->params->stub_bfd->sections;
12723 stub_sec != NULL;
12724 stub_sec = stub_sec->next)
12725 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12726 size += (17 + align - 1) & -align;
12727 if (htab->glink != NULL && htab->glink->size != 0)
12728 size += (24 + align - 1) & -align;
12729 if (size != 0)
12730 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12731 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12732 size = (size + align - 1) & -align;
12733 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12734 htab->glink_eh_frame->size = size;
12735 }
12736
12737 if (htab->params->plt_stub_align != 0)
12738 for (stub_sec = htab->params->stub_bfd->sections;
12739 stub_sec != NULL;
12740 stub_sec = stub_sec->next)
12741 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12742 stub_sec->size = ((stub_sec->size
12743 + (1 << htab->params->plt_stub_align) - 1)
12744 & -(1 << htab->params->plt_stub_align));
12745
12746 for (stub_sec = htab->params->stub_bfd->sections;
12747 stub_sec != NULL;
12748 stub_sec = stub_sec->next)
12749 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12750 && stub_sec->rawsize != stub_sec->size
12751 && (htab->stub_iteration <= STUB_SHRINK_ITER
12752 || stub_sec->rawsize < stub_sec->size))
12753 break;
12754
12755 if (stub_sec == NULL
12756 && (htab->glink_eh_frame == NULL
12757 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12758 break;
12759
12760 /* Ask the linker to do its stuff. */
12761 (*htab->params->layout_sections_again) ();
12762 }
12763
12764 if (htab->glink_eh_frame != NULL
12765 && htab->glink_eh_frame->size != 0)
12766 {
12767 bfd_vma val;
12768 bfd_byte *p, *last_fde;
12769 size_t last_fde_len, size, align, pad;
12770 asection *stub_sec;
12771
12772 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12773 if (p == NULL)
12774 return FALSE;
12775 htab->glink_eh_frame->contents = p;
12776 last_fde = p;
12777 align = 4;
12778
12779 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12780 /* CIE length (rewrite in case little-endian). */
12781 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12782 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12783 p += last_fde_len + 4;
12784
12785 for (stub_sec = htab->params->stub_bfd->sections;
12786 stub_sec != NULL;
12787 stub_sec = stub_sec->next)
12788 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12789 {
12790 last_fde = p;
12791 last_fde_len = ((17 + align - 1) & -align) - 4;
12792 /* FDE length. */
12793 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12794 p += 4;
12795 /* CIE pointer. */
12796 val = p - htab->glink_eh_frame->contents;
12797 bfd_put_32 (htab->elf.dynobj, val, p);
12798 p += 4;
12799 /* Offset to stub section, written later. */
12800 p += 4;
12801 /* stub section size. */
12802 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12803 p += 4;
12804 /* Augmentation. */
12805 p += 1;
12806 /* Pad. */
12807 p += ((17 + align - 1) & -align) - 17;
12808 }
12809 if (htab->glink != NULL && htab->glink->size != 0)
12810 {
12811 last_fde = p;
12812 last_fde_len = ((24 + align - 1) & -align) - 4;
12813 /* FDE length. */
12814 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12815 p += 4;
12816 /* CIE pointer. */
12817 val = p - htab->glink_eh_frame->contents;
12818 bfd_put_32 (htab->elf.dynobj, val, p);
12819 p += 4;
12820 /* Offset to .glink, written later. */
12821 p += 4;
12822 /* .glink size. */
12823 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12824 p += 4;
12825 /* Augmentation. */
12826 p += 1;
12827
12828 *p++ = DW_CFA_advance_loc + 1;
12829 *p++ = DW_CFA_register;
12830 *p++ = 65;
12831 *p++ = htab->opd_abi ? 12 : 0;
12832 *p++ = DW_CFA_advance_loc + 4;
12833 *p++ = DW_CFA_restore_extended;
12834 *p++ = 65;
12835 p += ((24 + align - 1) & -align) - 24;
12836 }
12837 /* Subsume any padding into the last FDE if user .eh_frame
12838 sections are aligned more than glink_eh_frame. Otherwise any
12839 zero padding will be seen as a terminator. */
12840 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12841 size = p - htab->glink_eh_frame->contents;
12842 pad = ((size + align - 1) & -align) - size;
12843 htab->glink_eh_frame->size = size + pad;
12844 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12845 }
12846
12847 maybe_strip_output (info, htab->brlt);
12848 if (htab->glink_eh_frame != NULL)
12849 maybe_strip_output (info, htab->glink_eh_frame);
12850
12851 return TRUE;
12852 }
12853
12854 /* Called after we have determined section placement. If sections
12855 move, we'll be called again. Provide a value for TOCstart. */
12856
12857 bfd_vma
12858 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12859 {
12860 asection *s;
12861 bfd_vma TOCstart, adjust;
12862
12863 if (info != NULL)
12864 {
12865 struct elf_link_hash_entry *h;
12866 struct elf_link_hash_table *htab = elf_hash_table (info);
12867
12868 if (is_elf_hash_table (htab)
12869 && htab->hgot != NULL)
12870 h = htab->hgot;
12871 else
12872 {
12873 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12874 if (is_elf_hash_table (htab))
12875 htab->hgot = h;
12876 }
12877 if (h != NULL
12878 && h->root.type == bfd_link_hash_defined
12879 && !h->root.linker_def
12880 && (!is_elf_hash_table (htab)
12881 || h->def_regular))
12882 {
12883 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12884 + h->root.u.def.section->output_offset
12885 + h->root.u.def.section->output_section->vma);
12886 _bfd_set_gp_value (obfd, TOCstart);
12887 return TOCstart;
12888 }
12889 }
12890
12891 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12892 order. The TOC starts where the first of these sections starts. */
12893 s = bfd_get_section_by_name (obfd, ".got");
12894 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12895 s = bfd_get_section_by_name (obfd, ".toc");
12896 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12897 s = bfd_get_section_by_name (obfd, ".tocbss");
12898 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12899 s = bfd_get_section_by_name (obfd, ".plt");
12900 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12901 {
12902 /* This may happen for
12903 o references to TOC base (SYM@toc / TOC[tc0]) without a
12904 .toc directive
12905 o bad linker script
12906 o --gc-sections and empty TOC sections
12907
12908 FIXME: Warn user? */
12909
12910 /* Look for a likely section. We probably won't even be
12911 using TOCstart. */
12912 for (s = obfd->sections; s != NULL; s = s->next)
12913 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12914 | SEC_EXCLUDE))
12915 == (SEC_ALLOC | SEC_SMALL_DATA))
12916 break;
12917 if (s == NULL)
12918 for (s = obfd->sections; s != NULL; s = s->next)
12919 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12920 == (SEC_ALLOC | SEC_SMALL_DATA))
12921 break;
12922 if (s == NULL)
12923 for (s = obfd->sections; s != NULL; s = s->next)
12924 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12925 == SEC_ALLOC)
12926 break;
12927 if (s == NULL)
12928 for (s = obfd->sections; s != NULL; s = s->next)
12929 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12930 break;
12931 }
12932
12933 TOCstart = 0;
12934 if (s != NULL)
12935 TOCstart = s->output_section->vma + s->output_offset;
12936
12937 /* Force alignment. */
12938 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12939 TOCstart -= adjust;
12940 _bfd_set_gp_value (obfd, TOCstart);
12941
12942 if (info != NULL && s != NULL)
12943 {
12944 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12945
12946 if (htab != NULL)
12947 {
12948 if (htab->elf.hgot != NULL)
12949 {
12950 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12951 htab->elf.hgot->root.u.def.section = s;
12952 }
12953 }
12954 else
12955 {
12956 struct bfd_link_hash_entry *bh = NULL;
12957 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12958 s, TOC_BASE_OFF - adjust,
12959 NULL, FALSE, FALSE, &bh);
12960 }
12961 }
12962 return TOCstart;
12963 }
12964
12965 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12966 write out any global entry stubs. */
12967
12968 static bfd_boolean
12969 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12970 {
12971 struct bfd_link_info *info;
12972 struct ppc_link_hash_table *htab;
12973 struct plt_entry *pent;
12974 asection *s;
12975
12976 if (h->root.type == bfd_link_hash_indirect)
12977 return TRUE;
12978
12979 if (!h->pointer_equality_needed)
12980 return TRUE;
12981
12982 if (h->def_regular)
12983 return TRUE;
12984
12985 info = inf;
12986 htab = ppc_hash_table (info);
12987 if (htab == NULL)
12988 return FALSE;
12989
12990 s = htab->glink;
12991 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12992 if (pent->plt.offset != (bfd_vma) -1
12993 && pent->addend == 0)
12994 {
12995 bfd_byte *p;
12996 asection *plt;
12997 bfd_vma off;
12998
12999 p = s->contents + h->root.u.def.value;
13000 plt = htab->elf.splt;
13001 if (!htab->elf.dynamic_sections_created
13002 || h->dynindx == -1)
13003 plt = htab->elf.iplt;
13004 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13005 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13006
13007 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13008 {
13009 info->callbacks->einfo
13010 (_("%P: linkage table error against `%T'\n"),
13011 h->root.root.string);
13012 bfd_set_error (bfd_error_bad_value);
13013 htab->stub_error = TRUE;
13014 }
13015
13016 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13017 if (htab->params->emit_stub_syms)
13018 {
13019 size_t len = strlen (h->root.root.string);
13020 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13021
13022 if (name == NULL)
13023 return FALSE;
13024
13025 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13026 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13027 if (h == NULL)
13028 return FALSE;
13029 if (h->root.type == bfd_link_hash_new)
13030 {
13031 h->root.type = bfd_link_hash_defined;
13032 h->root.u.def.section = s;
13033 h->root.u.def.value = p - s->contents;
13034 h->ref_regular = 1;
13035 h->def_regular = 1;
13036 h->ref_regular_nonweak = 1;
13037 h->forced_local = 1;
13038 h->non_elf = 0;
13039 h->root.linker_def = 1;
13040 }
13041 }
13042
13043 if (PPC_HA (off) != 0)
13044 {
13045 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13046 p += 4;
13047 }
13048 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13049 p += 4;
13050 bfd_put_32 (s->owner, MTCTR_R12, p);
13051 p += 4;
13052 bfd_put_32 (s->owner, BCTR, p);
13053 break;
13054 }
13055 return TRUE;
13056 }
13057
13058 /* Build all the stubs associated with the current output file.
13059 The stubs are kept in a hash table attached to the main linker
13060 hash table. This function is called via gldelf64ppc_finish. */
13061
13062 bfd_boolean
13063 ppc64_elf_build_stubs (struct bfd_link_info *info,
13064 char **stats)
13065 {
13066 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13067 struct map_stub *group;
13068 asection *stub_sec;
13069 bfd_byte *p;
13070 int stub_sec_count = 0;
13071
13072 if (htab == NULL)
13073 return FALSE;
13074
13075 /* Allocate memory to hold the linker stubs. */
13076 for (stub_sec = htab->params->stub_bfd->sections;
13077 stub_sec != NULL;
13078 stub_sec = stub_sec->next)
13079 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
13080 && stub_sec->size != 0)
13081 {
13082 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13083 if (stub_sec->contents == NULL)
13084 return FALSE;
13085 stub_sec->size = 0;
13086 }
13087
13088 if (htab->glink != NULL && htab->glink->size != 0)
13089 {
13090 unsigned int indx;
13091 bfd_vma plt0;
13092
13093 /* Build the .glink plt call stub. */
13094 if (htab->params->emit_stub_syms)
13095 {
13096 struct elf_link_hash_entry *h;
13097 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13098 TRUE, FALSE, FALSE);
13099 if (h == NULL)
13100 return FALSE;
13101 if (h->root.type == bfd_link_hash_new)
13102 {
13103 h->root.type = bfd_link_hash_defined;
13104 h->root.u.def.section = htab->glink;
13105 h->root.u.def.value = 8;
13106 h->ref_regular = 1;
13107 h->def_regular = 1;
13108 h->ref_regular_nonweak = 1;
13109 h->forced_local = 1;
13110 h->non_elf = 0;
13111 h->root.linker_def = 1;
13112 }
13113 }
13114 plt0 = (htab->elf.splt->output_section->vma
13115 + htab->elf.splt->output_offset
13116 - 16);
13117 if (info->emitrelocations)
13118 {
13119 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13120 if (r == NULL)
13121 return FALSE;
13122 r->r_offset = (htab->glink->output_offset
13123 + htab->glink->output_section->vma);
13124 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13125 r->r_addend = plt0;
13126 }
13127 p = htab->glink->contents;
13128 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13129 bfd_put_64 (htab->glink->owner, plt0, p);
13130 p += 8;
13131 if (htab->opd_abi)
13132 {
13133 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13134 p += 4;
13135 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13136 p += 4;
13137 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13138 p += 4;
13139 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13140 p += 4;
13141 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13142 p += 4;
13143 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13144 p += 4;
13145 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13146 p += 4;
13147 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13148 p += 4;
13149 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13150 p += 4;
13151 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13152 p += 4;
13153 }
13154 else
13155 {
13156 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13157 p += 4;
13158 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13159 p += 4;
13160 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13161 p += 4;
13162 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13163 p += 4;
13164 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13165 p += 4;
13166 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13167 p += 4;
13168 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13169 p += 4;
13170 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13171 p += 4;
13172 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13173 p += 4;
13174 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13175 p += 4;
13176 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13177 p += 4;
13178 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13179 p += 4;
13180 }
13181 bfd_put_32 (htab->glink->owner, BCTR, p);
13182 p += 4;
13183 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13184 {
13185 bfd_put_32 (htab->glink->owner, NOP, p);
13186 p += 4;
13187 }
13188
13189 /* Build the .glink lazy link call stubs. */
13190 indx = 0;
13191 while (p < htab->glink->contents + htab->glink->rawsize)
13192 {
13193 if (htab->opd_abi)
13194 {
13195 if (indx < 0x8000)
13196 {
13197 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13198 p += 4;
13199 }
13200 else
13201 {
13202 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13203 p += 4;
13204 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13205 p);
13206 p += 4;
13207 }
13208 }
13209 bfd_put_32 (htab->glink->owner,
13210 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13211 indx++;
13212 p += 4;
13213 }
13214
13215 /* Build .glink global entry stubs. */
13216 if (htab->glink->size > htab->glink->rawsize)
13217 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13218 }
13219
13220 if (htab->brlt != NULL && htab->brlt->size != 0)
13221 {
13222 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13223 htab->brlt->size);
13224 if (htab->brlt->contents == NULL)
13225 return FALSE;
13226 }
13227 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13228 {
13229 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13230 htab->relbrlt->size);
13231 if (htab->relbrlt->contents == NULL)
13232 return FALSE;
13233 }
13234
13235 /* Build the stubs as directed by the stub hash table. */
13236 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13237
13238 for (group = htab->group; group != NULL; group = group->next)
13239 if (group->needs_save_res)
13240 {
13241 stub_sec = group->stub_sec;
13242 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13243 htab->sfpr->size);
13244 if (htab->params->emit_stub_syms)
13245 {
13246 unsigned int i;
13247
13248 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13249 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13250 return FALSE;
13251 }
13252 stub_sec->size += htab->sfpr->size;
13253 }
13254
13255 if (htab->relbrlt != NULL)
13256 htab->relbrlt->reloc_count = 0;
13257
13258 if (htab->params->plt_stub_align != 0)
13259 for (stub_sec = htab->params->stub_bfd->sections;
13260 stub_sec != NULL;
13261 stub_sec = stub_sec->next)
13262 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13263 stub_sec->size = ((stub_sec->size
13264 + (1 << htab->params->plt_stub_align) - 1)
13265 & -(1 << htab->params->plt_stub_align));
13266
13267 for (stub_sec = htab->params->stub_bfd->sections;
13268 stub_sec != NULL;
13269 stub_sec = stub_sec->next)
13270 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13271 {
13272 stub_sec_count += 1;
13273 if (stub_sec->rawsize != stub_sec->size
13274 && (htab->stub_iteration <= STUB_SHRINK_ITER
13275 || stub_sec->rawsize < stub_sec->size))
13276 break;
13277 }
13278
13279 /* Note that the glink_eh_frame check here is not only testing that
13280 the generated size matched the calculated size but also that
13281 bfd_elf_discard_info didn't make any changes to the section. */
13282 if (stub_sec != NULL
13283 || (htab->glink_eh_frame != NULL
13284 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13285 {
13286 htab->stub_error = TRUE;
13287 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13288 }
13289
13290 if (htab->stub_error)
13291 return FALSE;
13292
13293 if (stats != NULL)
13294 {
13295 *stats = bfd_malloc (500);
13296 if (*stats == NULL)
13297 return FALSE;
13298
13299 sprintf (*stats, _("linker stubs in %u group%s\n"
13300 " branch %lu\n"
13301 " toc adjust %lu\n"
13302 " long branch %lu\n"
13303 " long toc adj %lu\n"
13304 " plt call %lu\n"
13305 " plt call toc %lu\n"
13306 " global entry %lu"),
13307 stub_sec_count,
13308 stub_sec_count == 1 ? "" : "s",
13309 htab->stub_count[ppc_stub_long_branch - 1],
13310 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13311 htab->stub_count[ppc_stub_plt_branch - 1],
13312 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13313 htab->stub_count[ppc_stub_plt_call - 1],
13314 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13315 htab->stub_count[ppc_stub_global_entry - 1]);
13316 }
13317 return TRUE;
13318 }
13319
13320 /* What to do when ld finds relocations against symbols defined in
13321 discarded sections. */
13322
13323 static unsigned int
13324 ppc64_elf_action_discarded (asection *sec)
13325 {
13326 if (strcmp (".opd", sec->name) == 0)
13327 return 0;
13328
13329 if (strcmp (".toc", sec->name) == 0)
13330 return 0;
13331
13332 if (strcmp (".toc1", sec->name) == 0)
13333 return 0;
13334
13335 return _bfd_elf_default_action_discarded (sec);
13336 }
13337
13338 /* The RELOCATE_SECTION function is called by the ELF backend linker
13339 to handle the relocations for a section.
13340
13341 The relocs are always passed as Rela structures; if the section
13342 actually uses Rel structures, the r_addend field will always be
13343 zero.
13344
13345 This function is responsible for adjust the section contents as
13346 necessary, and (if using Rela relocs and generating a
13347 relocatable output file) adjusting the reloc addend as
13348 necessary.
13349
13350 This function does not have to worry about setting the reloc
13351 address or the reloc symbol index.
13352
13353 LOCAL_SYMS is a pointer to the swapped in local symbols.
13354
13355 LOCAL_SECTIONS is an array giving the section in the input file
13356 corresponding to the st_shndx field of each local symbol.
13357
13358 The global hash table entry for the global symbols can be found
13359 via elf_sym_hashes (input_bfd).
13360
13361 When generating relocatable output, this function must handle
13362 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13363 going to be the section symbol corresponding to the output
13364 section, which means that the addend must be adjusted
13365 accordingly. */
13366
13367 static bfd_boolean
13368 ppc64_elf_relocate_section (bfd *output_bfd,
13369 struct bfd_link_info *info,
13370 bfd *input_bfd,
13371 asection *input_section,
13372 bfd_byte *contents,
13373 Elf_Internal_Rela *relocs,
13374 Elf_Internal_Sym *local_syms,
13375 asection **local_sections)
13376 {
13377 struct ppc_link_hash_table *htab;
13378 Elf_Internal_Shdr *symtab_hdr;
13379 struct elf_link_hash_entry **sym_hashes;
13380 Elf_Internal_Rela *rel;
13381 Elf_Internal_Rela *wrel;
13382 Elf_Internal_Rela *relend;
13383 Elf_Internal_Rela outrel;
13384 bfd_byte *loc;
13385 struct got_entry **local_got_ents;
13386 bfd_vma TOCstart;
13387 bfd_boolean ret = TRUE;
13388 bfd_boolean is_opd;
13389 /* Assume 'at' branch hints. */
13390 bfd_boolean is_isa_v2 = TRUE;
13391 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13392
13393 /* Initialize howto table if needed. */
13394 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13395 ppc_howto_init ();
13396
13397 htab = ppc_hash_table (info);
13398 if (htab == NULL)
13399 return FALSE;
13400
13401 /* Don't relocate stub sections. */
13402 if (input_section->owner == htab->params->stub_bfd)
13403 return TRUE;
13404
13405 BFD_ASSERT (is_ppc64_elf (input_bfd));
13406
13407 local_got_ents = elf_local_got_ents (input_bfd);
13408 TOCstart = elf_gp (output_bfd);
13409 symtab_hdr = &elf_symtab_hdr (input_bfd);
13410 sym_hashes = elf_sym_hashes (input_bfd);
13411 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13412
13413 rel = wrel = relocs;
13414 relend = relocs + input_section->reloc_count;
13415 for (; rel < relend; wrel++, rel++)
13416 {
13417 enum elf_ppc64_reloc_type r_type;
13418 bfd_vma addend;
13419 bfd_reloc_status_type r;
13420 Elf_Internal_Sym *sym;
13421 asection *sec;
13422 struct elf_link_hash_entry *h_elf;
13423 struct ppc_link_hash_entry *h;
13424 struct ppc_link_hash_entry *fdh;
13425 const char *sym_name;
13426 unsigned long r_symndx, toc_symndx;
13427 bfd_vma toc_addend;
13428 unsigned char tls_mask, tls_gd, tls_type;
13429 unsigned char sym_type;
13430 bfd_vma relocation;
13431 bfd_boolean unresolved_reloc;
13432 bfd_boolean warned;
13433 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13434 unsigned int insn;
13435 unsigned int mask;
13436 struct ppc_stub_hash_entry *stub_entry;
13437 bfd_vma max_br_offset;
13438 bfd_vma from;
13439 Elf_Internal_Rela orig_rel;
13440 reloc_howto_type *howto;
13441 struct reloc_howto_struct alt_howto;
13442
13443 again:
13444 orig_rel = *rel;
13445
13446 r_type = ELF64_R_TYPE (rel->r_info);
13447 r_symndx = ELF64_R_SYM (rel->r_info);
13448
13449 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13450 symbol of the previous ADDR64 reloc. The symbol gives us the
13451 proper TOC base to use. */
13452 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13453 && wrel != relocs
13454 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13455 && is_opd)
13456 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13457
13458 sym = NULL;
13459 sec = NULL;
13460 h_elf = NULL;
13461 sym_name = NULL;
13462 unresolved_reloc = FALSE;
13463 warned = FALSE;
13464
13465 if (r_symndx < symtab_hdr->sh_info)
13466 {
13467 /* It's a local symbol. */
13468 struct _opd_sec_data *opd;
13469
13470 sym = local_syms + r_symndx;
13471 sec = local_sections[r_symndx];
13472 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13473 sym_type = ELF64_ST_TYPE (sym->st_info);
13474 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13475 opd = get_opd_info (sec);
13476 if (opd != NULL && opd->adjust != NULL)
13477 {
13478 long adjust = opd->adjust[OPD_NDX (sym->st_value
13479 + rel->r_addend)];
13480 if (adjust == -1)
13481 relocation = 0;
13482 else
13483 {
13484 /* If this is a relocation against the opd section sym
13485 and we have edited .opd, adjust the reloc addend so
13486 that ld -r and ld --emit-relocs output is correct.
13487 If it is a reloc against some other .opd symbol,
13488 then the symbol value will be adjusted later. */
13489 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13490 rel->r_addend += adjust;
13491 else
13492 relocation += adjust;
13493 }
13494 }
13495 }
13496 else
13497 {
13498 bfd_boolean ignored;
13499
13500 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13501 r_symndx, symtab_hdr, sym_hashes,
13502 h_elf, sec, relocation,
13503 unresolved_reloc, warned, ignored);
13504 sym_name = h_elf->root.root.string;
13505 sym_type = h_elf->type;
13506 if (sec != NULL
13507 && sec->owner == output_bfd
13508 && strcmp (sec->name, ".opd") == 0)
13509 {
13510 /* This is a symbol defined in a linker script. All
13511 such are defined in output sections, even those
13512 defined by simple assignment from a symbol defined in
13513 an input section. Transfer the symbol to an
13514 appropriate input .opd section, so that a branch to
13515 this symbol will be mapped to the location specified
13516 by the opd entry. */
13517 struct bfd_link_order *lo;
13518 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13519 if (lo->type == bfd_indirect_link_order)
13520 {
13521 asection *isec = lo->u.indirect.section;
13522 if (h_elf->root.u.def.value >= isec->output_offset
13523 && h_elf->root.u.def.value < (isec->output_offset
13524 + isec->size))
13525 {
13526 h_elf->root.u.def.value -= isec->output_offset;
13527 h_elf->root.u.def.section = isec;
13528 sec = isec;
13529 break;
13530 }
13531 }
13532 }
13533 }
13534 h = (struct ppc_link_hash_entry *) h_elf;
13535
13536 if (sec != NULL && discarded_section (sec))
13537 {
13538 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13539 input_bfd, input_section,
13540 contents + rel->r_offset);
13541 wrel->r_offset = rel->r_offset;
13542 wrel->r_info = 0;
13543 wrel->r_addend = 0;
13544
13545 /* For ld -r, remove relocations in debug sections against
13546 sections defined in discarded sections. Not done for
13547 non-debug to preserve relocs in .eh_frame which the
13548 eh_frame editing code expects to be present. */
13549 if (bfd_link_relocatable (info)
13550 && (input_section->flags & SEC_DEBUGGING))
13551 wrel--;
13552
13553 continue;
13554 }
13555
13556 if (bfd_link_relocatable (info))
13557 goto copy_reloc;
13558
13559 if (h != NULL && &h->elf == htab->elf.hgot)
13560 {
13561 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13562 sec = bfd_abs_section_ptr;
13563 unresolved_reloc = FALSE;
13564 }
13565
13566 /* TLS optimizations. Replace instruction sequences and relocs
13567 based on information we collected in tls_optimize. We edit
13568 RELOCS so that --emit-relocs will output something sensible
13569 for the final instruction stream. */
13570 tls_mask = 0;
13571 tls_gd = 0;
13572 toc_symndx = 0;
13573 if (h != NULL)
13574 tls_mask = h->tls_mask;
13575 else if (local_got_ents != NULL)
13576 {
13577 struct plt_entry **local_plt = (struct plt_entry **)
13578 (local_got_ents + symtab_hdr->sh_info);
13579 unsigned char *lgot_masks = (unsigned char *)
13580 (local_plt + symtab_hdr->sh_info);
13581 tls_mask = lgot_masks[r_symndx];
13582 }
13583 if (tls_mask == 0
13584 && (r_type == R_PPC64_TLS
13585 || r_type == R_PPC64_TLSGD
13586 || r_type == R_PPC64_TLSLD))
13587 {
13588 /* Check for toc tls entries. */
13589 unsigned char *toc_tls;
13590
13591 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13592 &local_syms, rel, input_bfd))
13593 return FALSE;
13594
13595 if (toc_tls)
13596 tls_mask = *toc_tls;
13597 }
13598
13599 /* Check that tls relocs are used with tls syms, and non-tls
13600 relocs are used with non-tls syms. */
13601 if (r_symndx != STN_UNDEF
13602 && r_type != R_PPC64_NONE
13603 && (h == NULL
13604 || h->elf.root.type == bfd_link_hash_defined
13605 || h->elf.root.type == bfd_link_hash_defweak)
13606 && (IS_PPC64_TLS_RELOC (r_type)
13607 != (sym_type == STT_TLS
13608 || (sym_type == STT_SECTION
13609 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13610 {
13611 if (tls_mask != 0
13612 && (r_type == R_PPC64_TLS
13613 || r_type == R_PPC64_TLSGD
13614 || r_type == R_PPC64_TLSLD))
13615 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13616 ;
13617 else
13618 info->callbacks->einfo
13619 (!IS_PPC64_TLS_RELOC (r_type)
13620 /* xgettext:c-format */
13621 ? _("%H: %s used with TLS symbol `%T'\n")
13622 /* xgettext:c-format */
13623 : _("%H: %s used with non-TLS symbol `%T'\n"),
13624 input_bfd, input_section, rel->r_offset,
13625 ppc64_elf_howto_table[r_type]->name,
13626 sym_name);
13627 }
13628
13629 /* Ensure reloc mapping code below stays sane. */
13630 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13631 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13632 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13633 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13634 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13635 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13636 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13637 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13638 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13639 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13640 abort ();
13641
13642 switch (r_type)
13643 {
13644 default:
13645 break;
13646
13647 case R_PPC64_LO_DS_OPT:
13648 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13649 if ((insn & (0x3f << 26)) != 58u << 26)
13650 abort ();
13651 insn += (14u << 26) - (58u << 26);
13652 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13653 r_type = R_PPC64_TOC16_LO;
13654 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13655 break;
13656
13657 case R_PPC64_TOC16:
13658 case R_PPC64_TOC16_LO:
13659 case R_PPC64_TOC16_DS:
13660 case R_PPC64_TOC16_LO_DS:
13661 {
13662 /* Check for toc tls entries. */
13663 unsigned char *toc_tls;
13664 int retval;
13665
13666 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13667 &local_syms, rel, input_bfd);
13668 if (retval == 0)
13669 return FALSE;
13670
13671 if (toc_tls)
13672 {
13673 tls_mask = *toc_tls;
13674 if (r_type == R_PPC64_TOC16_DS
13675 || r_type == R_PPC64_TOC16_LO_DS)
13676 {
13677 if (tls_mask != 0
13678 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13679 goto toctprel;
13680 }
13681 else
13682 {
13683 /* If we found a GD reloc pair, then we might be
13684 doing a GD->IE transition. */
13685 if (retval == 2)
13686 {
13687 tls_gd = TLS_TPRELGD;
13688 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13689 goto tls_ldgd_opt;
13690 }
13691 else if (retval == 3)
13692 {
13693 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13694 goto tls_ldgd_opt;
13695 }
13696 }
13697 }
13698 }
13699 break;
13700
13701 case R_PPC64_GOT_TPREL16_HI:
13702 case R_PPC64_GOT_TPREL16_HA:
13703 if (tls_mask != 0
13704 && (tls_mask & TLS_TPREL) == 0)
13705 {
13706 rel->r_offset -= d_offset;
13707 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13708 r_type = R_PPC64_NONE;
13709 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13710 }
13711 break;
13712
13713 case R_PPC64_GOT_TPREL16_DS:
13714 case R_PPC64_GOT_TPREL16_LO_DS:
13715 if (tls_mask != 0
13716 && (tls_mask & TLS_TPREL) == 0)
13717 {
13718 toctprel:
13719 insn = bfd_get_32 (input_bfd,
13720 contents + rel->r_offset - d_offset);
13721 insn &= 31 << 21;
13722 insn |= 0x3c0d0000; /* addis 0,13,0 */
13723 bfd_put_32 (input_bfd, insn,
13724 contents + rel->r_offset - d_offset);
13725 r_type = R_PPC64_TPREL16_HA;
13726 if (toc_symndx != 0)
13727 {
13728 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13729 rel->r_addend = toc_addend;
13730 /* We changed the symbol. Start over in order to
13731 get h, sym, sec etc. right. */
13732 goto again;
13733 }
13734 else
13735 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13736 }
13737 break;
13738
13739 case R_PPC64_TLS:
13740 if (tls_mask != 0
13741 && (tls_mask & TLS_TPREL) == 0)
13742 {
13743 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13744 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13745 if (insn == 0)
13746 abort ();
13747 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13748 /* Was PPC64_TLS which sits on insn boundary, now
13749 PPC64_TPREL16_LO which is at low-order half-word. */
13750 rel->r_offset += d_offset;
13751 r_type = R_PPC64_TPREL16_LO;
13752 if (toc_symndx != 0)
13753 {
13754 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13755 rel->r_addend = toc_addend;
13756 /* We changed the symbol. Start over in order to
13757 get h, sym, sec etc. right. */
13758 goto again;
13759 }
13760 else
13761 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13762 }
13763 break;
13764
13765 case R_PPC64_GOT_TLSGD16_HI:
13766 case R_PPC64_GOT_TLSGD16_HA:
13767 tls_gd = TLS_TPRELGD;
13768 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13769 goto tls_gdld_hi;
13770 break;
13771
13772 case R_PPC64_GOT_TLSLD16_HI:
13773 case R_PPC64_GOT_TLSLD16_HA:
13774 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13775 {
13776 tls_gdld_hi:
13777 if ((tls_mask & tls_gd) != 0)
13778 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13779 + R_PPC64_GOT_TPREL16_DS);
13780 else
13781 {
13782 rel->r_offset -= d_offset;
13783 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13784 r_type = R_PPC64_NONE;
13785 }
13786 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13787 }
13788 break;
13789
13790 case R_PPC64_GOT_TLSGD16:
13791 case R_PPC64_GOT_TLSGD16_LO:
13792 tls_gd = TLS_TPRELGD;
13793 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13794 goto tls_ldgd_opt;
13795 break;
13796
13797 case R_PPC64_GOT_TLSLD16:
13798 case R_PPC64_GOT_TLSLD16_LO:
13799 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13800 {
13801 unsigned int insn1, insn2, insn3;
13802 bfd_vma offset;
13803
13804 tls_ldgd_opt:
13805 offset = (bfd_vma) -1;
13806 /* If not using the newer R_PPC64_TLSGD/LD to mark
13807 __tls_get_addr calls, we must trust that the call
13808 stays with its arg setup insns, ie. that the next
13809 reloc is the __tls_get_addr call associated with
13810 the current reloc. Edit both insns. */
13811 if (input_section->has_tls_get_addr_call
13812 && rel + 1 < relend
13813 && branch_reloc_hash_match (input_bfd, rel + 1,
13814 htab->tls_get_addr,
13815 htab->tls_get_addr_fd))
13816 offset = rel[1].r_offset;
13817 /* We read the low GOT_TLS (or TOC16) insn because we
13818 need to keep the destination reg. It may be
13819 something other than the usual r3, and moved to r3
13820 before the call by intervening code. */
13821 insn1 = bfd_get_32 (input_bfd,
13822 contents + rel->r_offset - d_offset);
13823 if ((tls_mask & tls_gd) != 0)
13824 {
13825 /* IE */
13826 insn1 &= (0x1f << 21) | (0x1f << 16);
13827 insn1 |= 58 << 26; /* ld */
13828 insn2 = 0x7c636a14; /* add 3,3,13 */
13829 if (offset != (bfd_vma) -1)
13830 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13831 if ((tls_mask & TLS_EXPLICIT) == 0)
13832 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13833 + R_PPC64_GOT_TPREL16_DS);
13834 else
13835 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13836 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13837 }
13838 else
13839 {
13840 /* LE */
13841 insn1 &= 0x1f << 21;
13842 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13843 insn2 = 0x38630000; /* addi 3,3,0 */
13844 if (tls_gd == 0)
13845 {
13846 /* Was an LD reloc. */
13847 if (toc_symndx)
13848 sec = local_sections[toc_symndx];
13849 for (r_symndx = 0;
13850 r_symndx < symtab_hdr->sh_info;
13851 r_symndx++)
13852 if (local_sections[r_symndx] == sec)
13853 break;
13854 if (r_symndx >= symtab_hdr->sh_info)
13855 r_symndx = STN_UNDEF;
13856 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13857 if (r_symndx != STN_UNDEF)
13858 rel->r_addend -= (local_syms[r_symndx].st_value
13859 + sec->output_offset
13860 + sec->output_section->vma);
13861 }
13862 else if (toc_symndx != 0)
13863 {
13864 r_symndx = toc_symndx;
13865 rel->r_addend = toc_addend;
13866 }
13867 r_type = R_PPC64_TPREL16_HA;
13868 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13869 if (offset != (bfd_vma) -1)
13870 {
13871 rel[1].r_info = ELF64_R_INFO (r_symndx,
13872 R_PPC64_TPREL16_LO);
13873 rel[1].r_offset = offset + d_offset;
13874 rel[1].r_addend = rel->r_addend;
13875 }
13876 }
13877 bfd_put_32 (input_bfd, insn1,
13878 contents + rel->r_offset - d_offset);
13879 if (offset != (bfd_vma) -1)
13880 {
13881 insn3 = bfd_get_32 (input_bfd,
13882 contents + offset + 4);
13883 if (insn3 == NOP
13884 || insn3 == CROR_151515 || insn3 == CROR_313131)
13885 {
13886 rel[1].r_offset += 4;
13887 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13888 insn2 = NOP;
13889 }
13890 bfd_put_32 (input_bfd, insn2, contents + offset);
13891 }
13892 if ((tls_mask & tls_gd) == 0
13893 && (tls_gd == 0 || toc_symndx != 0))
13894 {
13895 /* We changed the symbol. Start over in order
13896 to get h, sym, sec etc. right. */
13897 goto again;
13898 }
13899 }
13900 break;
13901
13902 case R_PPC64_TLSGD:
13903 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13904 {
13905 unsigned int insn2, insn3;
13906 bfd_vma offset = rel->r_offset;
13907
13908 if ((tls_mask & TLS_TPRELGD) != 0)
13909 {
13910 /* IE */
13911 r_type = R_PPC64_NONE;
13912 insn2 = 0x7c636a14; /* add 3,3,13 */
13913 }
13914 else
13915 {
13916 /* LE */
13917 if (toc_symndx != 0)
13918 {
13919 r_symndx = toc_symndx;
13920 rel->r_addend = toc_addend;
13921 }
13922 r_type = R_PPC64_TPREL16_LO;
13923 rel->r_offset = offset + d_offset;
13924 insn2 = 0x38630000; /* addi 3,3,0 */
13925 }
13926 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13927 /* Zap the reloc on the _tls_get_addr call too. */
13928 BFD_ASSERT (offset == rel[1].r_offset);
13929 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13930 insn3 = bfd_get_32 (input_bfd,
13931 contents + offset + 4);
13932 if (insn3 == NOP
13933 || insn3 == CROR_151515 || insn3 == CROR_313131)
13934 {
13935 rel->r_offset += 4;
13936 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13937 insn2 = NOP;
13938 }
13939 bfd_put_32 (input_bfd, insn2, contents + offset);
13940 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13941 goto again;
13942 }
13943 break;
13944
13945 case R_PPC64_TLSLD:
13946 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13947 {
13948 unsigned int insn2, insn3;
13949 bfd_vma offset = rel->r_offset;
13950
13951 if (toc_symndx)
13952 sec = local_sections[toc_symndx];
13953 for (r_symndx = 0;
13954 r_symndx < symtab_hdr->sh_info;
13955 r_symndx++)
13956 if (local_sections[r_symndx] == sec)
13957 break;
13958 if (r_symndx >= symtab_hdr->sh_info)
13959 r_symndx = STN_UNDEF;
13960 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13961 if (r_symndx != STN_UNDEF)
13962 rel->r_addend -= (local_syms[r_symndx].st_value
13963 + sec->output_offset
13964 + sec->output_section->vma);
13965
13966 r_type = R_PPC64_TPREL16_LO;
13967 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13968 rel->r_offset = offset + d_offset;
13969 /* Zap the reloc on the _tls_get_addr call too. */
13970 BFD_ASSERT (offset == rel[1].r_offset);
13971 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13972 insn2 = 0x38630000; /* addi 3,3,0 */
13973 insn3 = bfd_get_32 (input_bfd,
13974 contents + offset + 4);
13975 if (insn3 == NOP
13976 || insn3 == CROR_151515 || insn3 == CROR_313131)
13977 {
13978 rel->r_offset += 4;
13979 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13980 insn2 = NOP;
13981 }
13982 bfd_put_32 (input_bfd, insn2, contents + offset);
13983 goto again;
13984 }
13985 break;
13986
13987 case R_PPC64_DTPMOD64:
13988 if (rel + 1 < relend
13989 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13990 && rel[1].r_offset == rel->r_offset + 8)
13991 {
13992 if ((tls_mask & TLS_GD) == 0)
13993 {
13994 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13995 if ((tls_mask & TLS_TPRELGD) != 0)
13996 r_type = R_PPC64_TPREL64;
13997 else
13998 {
13999 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14000 r_type = R_PPC64_NONE;
14001 }
14002 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14003 }
14004 }
14005 else
14006 {
14007 if ((tls_mask & TLS_LD) == 0)
14008 {
14009 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14010 r_type = R_PPC64_NONE;
14011 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14012 }
14013 }
14014 break;
14015
14016 case R_PPC64_TPREL64:
14017 if ((tls_mask & TLS_TPREL) == 0)
14018 {
14019 r_type = R_PPC64_NONE;
14020 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14021 }
14022 break;
14023
14024 case R_PPC64_ENTRY:
14025 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14026 if (!bfd_link_pic (info)
14027 && !info->traditional_format
14028 && relocation + 0x80008000 <= 0xffffffff)
14029 {
14030 unsigned int insn1, insn2;
14031
14032 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14033 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14034 if ((insn1 & ~0xfffc) == LD_R2_0R12
14035 && insn2 == ADD_R2_R2_R12)
14036 {
14037 bfd_put_32 (input_bfd,
14038 LIS_R2 + PPC_HA (relocation),
14039 contents + rel->r_offset);
14040 bfd_put_32 (input_bfd,
14041 ADDI_R2_R2 + PPC_LO (relocation),
14042 contents + rel->r_offset + 4);
14043 }
14044 }
14045 else
14046 {
14047 relocation -= (rel->r_offset
14048 + input_section->output_offset
14049 + input_section->output_section->vma);
14050 if (relocation + 0x80008000 <= 0xffffffff)
14051 {
14052 unsigned int insn1, insn2;
14053
14054 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14055 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14056 if ((insn1 & ~0xfffc) == LD_R2_0R12
14057 && insn2 == ADD_R2_R2_R12)
14058 {
14059 bfd_put_32 (input_bfd,
14060 ADDIS_R2_R12 + PPC_HA (relocation),
14061 contents + rel->r_offset);
14062 bfd_put_32 (input_bfd,
14063 ADDI_R2_R2 + PPC_LO (relocation),
14064 contents + rel->r_offset + 4);
14065 }
14066 }
14067 }
14068 break;
14069
14070 case R_PPC64_REL16_HA:
14071 /* If we are generating a non-PIC executable, edit
14072 . 0: addis 2,12,.TOC.-0b@ha
14073 . addi 2,2,.TOC.-0b@l
14074 used by ELFv2 global entry points to set up r2, to
14075 . lis 2,.TOC.@ha
14076 . addi 2,2,.TOC.@l
14077 if .TOC. is in range. */
14078 if (!bfd_link_pic (info)
14079 && !info->traditional_format
14080 && !htab->opd_abi
14081 && rel->r_addend == d_offset
14082 && h != NULL && &h->elf == htab->elf.hgot
14083 && rel + 1 < relend
14084 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14085 && rel[1].r_offset == rel->r_offset + 4
14086 && rel[1].r_addend == rel->r_addend + 4
14087 && relocation + 0x80008000 <= 0xffffffff)
14088 {
14089 unsigned int insn1, insn2;
14090 bfd_vma offset = rel->r_offset - d_offset;
14091 insn1 = bfd_get_32 (input_bfd, contents + offset);
14092 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14093 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14094 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14095 {
14096 r_type = R_PPC64_ADDR16_HA;
14097 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14098 rel->r_addend -= d_offset;
14099 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14100 rel[1].r_addend -= d_offset + 4;
14101 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14102 }
14103 }
14104 break;
14105 }
14106
14107 /* Handle other relocations that tweak non-addend part of insn. */
14108 insn = 0;
14109 max_br_offset = 1 << 25;
14110 addend = rel->r_addend;
14111 reloc_dest = DEST_NORMAL;
14112 switch (r_type)
14113 {
14114 default:
14115 break;
14116
14117 case R_PPC64_TOCSAVE:
14118 if (relocation + addend == (rel->r_offset
14119 + input_section->output_offset
14120 + input_section->output_section->vma)
14121 && tocsave_find (htab, NO_INSERT,
14122 &local_syms, rel, input_bfd))
14123 {
14124 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14125 if (insn == NOP
14126 || insn == CROR_151515 || insn == CROR_313131)
14127 bfd_put_32 (input_bfd,
14128 STD_R2_0R1 + STK_TOC (htab),
14129 contents + rel->r_offset);
14130 }
14131 break;
14132
14133 /* Branch taken prediction relocations. */
14134 case R_PPC64_ADDR14_BRTAKEN:
14135 case R_PPC64_REL14_BRTAKEN:
14136 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14137 /* Fall through. */
14138
14139 /* Branch not taken prediction relocations. */
14140 case R_PPC64_ADDR14_BRNTAKEN:
14141 case R_PPC64_REL14_BRNTAKEN:
14142 insn |= bfd_get_32 (input_bfd,
14143 contents + rel->r_offset) & ~(0x01 << 21);
14144 /* Fall through. */
14145
14146 case R_PPC64_REL14:
14147 max_br_offset = 1 << 15;
14148 /* Fall through. */
14149
14150 case R_PPC64_REL24:
14151 /* Calls to functions with a different TOC, such as calls to
14152 shared objects, need to alter the TOC pointer. This is
14153 done using a linkage stub. A REL24 branching to these
14154 linkage stubs needs to be followed by a nop, as the nop
14155 will be replaced with an instruction to restore the TOC
14156 base pointer. */
14157 fdh = h;
14158 if (h != NULL
14159 && h->oh != NULL
14160 && h->oh->is_func_descriptor)
14161 fdh = ppc_follow_link (h->oh);
14162 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14163 htab);
14164 if (stub_entry != NULL
14165 && (stub_entry->stub_type == ppc_stub_plt_call
14166 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14167 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14168 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14169 {
14170 bfd_boolean can_plt_call = FALSE;
14171
14172 /* All of these stubs will modify r2, so there must be a
14173 branch and link followed by a nop. The nop is
14174 replaced by an insn to restore r2. */
14175 if (rel->r_offset + 8 <= input_section->size)
14176 {
14177 unsigned long br;
14178
14179 br = bfd_get_32 (input_bfd,
14180 contents + rel->r_offset);
14181 if ((br & 1) != 0)
14182 {
14183 unsigned long nop;
14184
14185 nop = bfd_get_32 (input_bfd,
14186 contents + rel->r_offset + 4);
14187 if (nop == NOP
14188 || nop == CROR_151515 || nop == CROR_313131)
14189 {
14190 if (h != NULL
14191 && (h == htab->tls_get_addr_fd
14192 || h == htab->tls_get_addr)
14193 && htab->params->tls_get_addr_opt)
14194 {
14195 /* Special stub used, leave nop alone. */
14196 }
14197 else
14198 bfd_put_32 (input_bfd,
14199 LD_R2_0R1 + STK_TOC (htab),
14200 contents + rel->r_offset + 4);
14201 can_plt_call = TRUE;
14202 }
14203 }
14204 }
14205
14206 if (!can_plt_call && h != NULL)
14207 {
14208 const char *name = h->elf.root.root.string;
14209
14210 if (*name == '.')
14211 ++name;
14212
14213 if (strncmp (name, "__libc_start_main", 17) == 0
14214 && (name[17] == 0 || name[17] == '@'))
14215 {
14216 /* Allow crt1 branch to go via a toc adjusting
14217 stub. Other calls that never return could do
14218 the same, if we could detect such. */
14219 can_plt_call = TRUE;
14220 }
14221 }
14222
14223 if (!can_plt_call)
14224 {
14225 /* g++ as of 20130507 emits self-calls without a
14226 following nop. This is arguably wrong since we
14227 have conflicting information. On the one hand a
14228 global symbol and on the other a local call
14229 sequence, but don't error for this special case.
14230 It isn't possible to cheaply verify we have
14231 exactly such a call. Allow all calls to the same
14232 section. */
14233 asection *code_sec = sec;
14234
14235 if (get_opd_info (sec) != NULL)
14236 {
14237 bfd_vma off = (relocation + addend
14238 - sec->output_section->vma
14239 - sec->output_offset);
14240
14241 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14242 }
14243 if (code_sec == input_section)
14244 can_plt_call = TRUE;
14245 }
14246
14247 if (!can_plt_call)
14248 {
14249 if (stub_entry->stub_type == ppc_stub_plt_call
14250 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14251 info->callbacks->einfo
14252 /* xgettext:c-format */
14253 (_("%H: call to `%T' lacks nop, can't restore toc; "
14254 "recompile with -fPIC\n"),
14255 input_bfd, input_section, rel->r_offset, sym_name);
14256 else
14257 info->callbacks->einfo
14258 /* xgettext:c-format */
14259 (_("%H: call to `%T' lacks nop, can't restore toc; "
14260 "(-mcmodel=small toc adjust stub)\n"),
14261 input_bfd, input_section, rel->r_offset, sym_name);
14262
14263 bfd_set_error (bfd_error_bad_value);
14264 ret = FALSE;
14265 }
14266
14267 if (can_plt_call
14268 && (stub_entry->stub_type == ppc_stub_plt_call
14269 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14270 unresolved_reloc = FALSE;
14271 }
14272
14273 if ((stub_entry == NULL
14274 || stub_entry->stub_type == ppc_stub_long_branch
14275 || stub_entry->stub_type == ppc_stub_plt_branch)
14276 && get_opd_info (sec) != NULL)
14277 {
14278 /* The branch destination is the value of the opd entry. */
14279 bfd_vma off = (relocation + addend
14280 - sec->output_section->vma
14281 - sec->output_offset);
14282 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14283 if (dest != (bfd_vma) -1)
14284 {
14285 relocation = dest;
14286 addend = 0;
14287 reloc_dest = DEST_OPD;
14288 }
14289 }
14290
14291 /* If the branch is out of reach we ought to have a long
14292 branch stub. */
14293 from = (rel->r_offset
14294 + input_section->output_offset
14295 + input_section->output_section->vma);
14296
14297 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14298 ? fdh->elf.other
14299 : sym->st_other);
14300
14301 if (stub_entry != NULL
14302 && (stub_entry->stub_type == ppc_stub_long_branch
14303 || stub_entry->stub_type == ppc_stub_plt_branch)
14304 && (r_type == R_PPC64_ADDR14_BRTAKEN
14305 || r_type == R_PPC64_ADDR14_BRNTAKEN
14306 || (relocation + addend - from + max_br_offset
14307 < 2 * max_br_offset)))
14308 /* Don't use the stub if this branch is in range. */
14309 stub_entry = NULL;
14310
14311 if (stub_entry != NULL)
14312 {
14313 /* Munge up the value and addend so that we call the stub
14314 rather than the procedure directly. */
14315 asection *stub_sec = stub_entry->group->stub_sec;
14316
14317 if (stub_entry->stub_type == ppc_stub_save_res)
14318 relocation += (stub_sec->output_offset
14319 + stub_sec->output_section->vma
14320 + stub_sec->size - htab->sfpr->size
14321 - htab->sfpr->output_offset
14322 - htab->sfpr->output_section->vma);
14323 else
14324 relocation = (stub_entry->stub_offset
14325 + stub_sec->output_offset
14326 + stub_sec->output_section->vma);
14327 addend = 0;
14328 reloc_dest = DEST_STUB;
14329
14330 if ((stub_entry->stub_type == ppc_stub_plt_call
14331 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14332 && (ALWAYS_EMIT_R2SAVE
14333 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14334 && rel + 1 < relend
14335 && rel[1].r_offset == rel->r_offset + 4
14336 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14337 relocation += 4;
14338 }
14339
14340 if (insn != 0)
14341 {
14342 if (is_isa_v2)
14343 {
14344 /* Set 'a' bit. This is 0b00010 in BO field for branch
14345 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14346 for branch on CTR insns (BO == 1a00t or 1a01t). */
14347 if ((insn & (0x14 << 21)) == (0x04 << 21))
14348 insn |= 0x02 << 21;
14349 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14350 insn |= 0x08 << 21;
14351 else
14352 break;
14353 }
14354 else
14355 {
14356 /* Invert 'y' bit if not the default. */
14357 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14358 insn ^= 0x01 << 21;
14359 }
14360
14361 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14362 }
14363
14364 /* NOP out calls to undefined weak functions.
14365 We can thus call a weak function without first
14366 checking whether the function is defined. */
14367 else if (h != NULL
14368 && h->elf.root.type == bfd_link_hash_undefweak
14369 && h->elf.dynindx == -1
14370 && r_type == R_PPC64_REL24
14371 && relocation == 0
14372 && addend == 0)
14373 {
14374 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14375 goto copy_reloc;
14376 }
14377 break;
14378 }
14379
14380 /* Set `addend'. */
14381 tls_type = 0;
14382 switch (r_type)
14383 {
14384 default:
14385 info->callbacks->einfo
14386 /* xgettext:c-format */
14387 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14388 input_bfd, (int) r_type, sym_name);
14389
14390 bfd_set_error (bfd_error_bad_value);
14391 ret = FALSE;
14392 goto copy_reloc;
14393
14394 case R_PPC64_NONE:
14395 case R_PPC64_TLS:
14396 case R_PPC64_TLSGD:
14397 case R_PPC64_TLSLD:
14398 case R_PPC64_TOCSAVE:
14399 case R_PPC64_GNU_VTINHERIT:
14400 case R_PPC64_GNU_VTENTRY:
14401 case R_PPC64_ENTRY:
14402 goto copy_reloc;
14403
14404 /* GOT16 relocations. Like an ADDR16 using the symbol's
14405 address in the GOT as relocation value instead of the
14406 symbol's value itself. Also, create a GOT entry for the
14407 symbol and put the symbol value there. */
14408 case R_PPC64_GOT_TLSGD16:
14409 case R_PPC64_GOT_TLSGD16_LO:
14410 case R_PPC64_GOT_TLSGD16_HI:
14411 case R_PPC64_GOT_TLSGD16_HA:
14412 tls_type = TLS_TLS | TLS_GD;
14413 goto dogot;
14414
14415 case R_PPC64_GOT_TLSLD16:
14416 case R_PPC64_GOT_TLSLD16_LO:
14417 case R_PPC64_GOT_TLSLD16_HI:
14418 case R_PPC64_GOT_TLSLD16_HA:
14419 tls_type = TLS_TLS | TLS_LD;
14420 goto dogot;
14421
14422 case R_PPC64_GOT_TPREL16_DS:
14423 case R_PPC64_GOT_TPREL16_LO_DS:
14424 case R_PPC64_GOT_TPREL16_HI:
14425 case R_PPC64_GOT_TPREL16_HA:
14426 tls_type = TLS_TLS | TLS_TPREL;
14427 goto dogot;
14428
14429 case R_PPC64_GOT_DTPREL16_DS:
14430 case R_PPC64_GOT_DTPREL16_LO_DS:
14431 case R_PPC64_GOT_DTPREL16_HI:
14432 case R_PPC64_GOT_DTPREL16_HA:
14433 tls_type = TLS_TLS | TLS_DTPREL;
14434 goto dogot;
14435
14436 case R_PPC64_GOT16:
14437 case R_PPC64_GOT16_LO:
14438 case R_PPC64_GOT16_HI:
14439 case R_PPC64_GOT16_HA:
14440 case R_PPC64_GOT16_DS:
14441 case R_PPC64_GOT16_LO_DS:
14442 dogot:
14443 {
14444 /* Relocation is to the entry for this symbol in the global
14445 offset table. */
14446 asection *got;
14447 bfd_vma *offp;
14448 bfd_vma off;
14449 unsigned long indx = 0;
14450 struct got_entry *ent;
14451
14452 if (tls_type == (TLS_TLS | TLS_LD)
14453 && (h == NULL
14454 || !h->elf.def_dynamic))
14455 ent = ppc64_tlsld_got (input_bfd);
14456 else
14457 {
14458 if (h != NULL)
14459 {
14460 if (!htab->elf.dynamic_sections_created
14461 || h->elf.dynindx == -1
14462 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14463 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14464 /* This is actually a static link, or it is a
14465 -Bsymbolic link and the symbol is defined
14466 locally, or the symbol was forced to be local
14467 because of a version file. */
14468 ;
14469 else
14470 {
14471 indx = h->elf.dynindx;
14472 unresolved_reloc = FALSE;
14473 }
14474 ent = h->elf.got.glist;
14475 }
14476 else
14477 {
14478 if (local_got_ents == NULL)
14479 abort ();
14480 ent = local_got_ents[r_symndx];
14481 }
14482
14483 for (; ent != NULL; ent = ent->next)
14484 if (ent->addend == orig_rel.r_addend
14485 && ent->owner == input_bfd
14486 && ent->tls_type == tls_type)
14487 break;
14488 }
14489
14490 if (ent == NULL)
14491 abort ();
14492 if (ent->is_indirect)
14493 ent = ent->got.ent;
14494 offp = &ent->got.offset;
14495 got = ppc64_elf_tdata (ent->owner)->got;
14496 if (got == NULL)
14497 abort ();
14498
14499 /* The offset must always be a multiple of 8. We use the
14500 least significant bit to record whether we have already
14501 processed this entry. */
14502 off = *offp;
14503 if ((off & 1) != 0)
14504 off &= ~1;
14505 else
14506 {
14507 /* Generate relocs for the dynamic linker, except in
14508 the case of TLSLD where we'll use one entry per
14509 module. */
14510 asection *relgot;
14511 bfd_boolean ifunc;
14512
14513 *offp = off | 1;
14514 relgot = NULL;
14515 ifunc = (h != NULL
14516 ? h->elf.type == STT_GNU_IFUNC
14517 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14518 if (ifunc)
14519 {
14520 relgot = htab->elf.irelplt;
14521 if (indx == 0)
14522 htab->local_ifunc_resolver = 1;
14523 else if (is_static_defined (&h->elf))
14524 htab->maybe_local_ifunc_resolver = 1;
14525 }
14526 else if (indx != 0
14527 || (bfd_link_pic (info)
14528 && (h == NULL
14529 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14530 || (tls_type == (TLS_TLS | TLS_LD)
14531 && !h->elf.def_dynamic))))
14532 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14533 if (relgot != NULL)
14534 {
14535 outrel.r_offset = (got->output_section->vma
14536 + got->output_offset
14537 + off);
14538 outrel.r_addend = addend;
14539 if (tls_type & (TLS_LD | TLS_GD))
14540 {
14541 outrel.r_addend = 0;
14542 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14543 if (tls_type == (TLS_TLS | TLS_GD))
14544 {
14545 loc = relgot->contents;
14546 loc += (relgot->reloc_count++
14547 * sizeof (Elf64_External_Rela));
14548 bfd_elf64_swap_reloca_out (output_bfd,
14549 &outrel, loc);
14550 outrel.r_offset += 8;
14551 outrel.r_addend = addend;
14552 outrel.r_info
14553 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14554 }
14555 }
14556 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14557 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14558 else if (tls_type == (TLS_TLS | TLS_TPREL))
14559 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14560 else if (indx != 0)
14561 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14562 else
14563 {
14564 if (ifunc)
14565 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14566 else
14567 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14568
14569 /* Write the .got section contents for the sake
14570 of prelink. */
14571 loc = got->contents + off;
14572 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14573 loc);
14574 }
14575
14576 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14577 {
14578 outrel.r_addend += relocation;
14579 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14580 {
14581 if (htab->elf.tls_sec == NULL)
14582 outrel.r_addend = 0;
14583 else
14584 outrel.r_addend -= htab->elf.tls_sec->vma;
14585 }
14586 }
14587 loc = relgot->contents;
14588 loc += (relgot->reloc_count++
14589 * sizeof (Elf64_External_Rela));
14590 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14591 }
14592
14593 /* Init the .got section contents here if we're not
14594 emitting a reloc. */
14595 else
14596 {
14597 int tlsopt
14598 = (htab->params->tls_get_addr_opt
14599 && htab->tls_get_addr_fd != NULL
14600 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
14601
14602 relocation += addend;
14603 if (tls_type != 0)
14604 {
14605 if (htab->elf.tls_sec == NULL)
14606 relocation = 0;
14607 else
14608 {
14609 if (tls_type & TLS_LD)
14610 relocation = 0;
14611 else
14612 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14613 if ((tls_type & TLS_TPREL)
14614 || (tlsopt && !(tls_type & TLS_DTPREL)))
14615 relocation += DTP_OFFSET - TP_OFFSET;
14616 }
14617
14618 if (tls_type & (TLS_GD | TLS_LD))
14619 {
14620 bfd_put_64 (output_bfd, relocation,
14621 got->contents + off + 8);
14622 relocation = !tlsopt;
14623 }
14624 }
14625 bfd_put_64 (output_bfd, relocation,
14626 got->contents + off);
14627 }
14628 }
14629
14630 if (off >= (bfd_vma) -2)
14631 abort ();
14632
14633 relocation = got->output_section->vma + got->output_offset + off;
14634 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14635 }
14636 break;
14637
14638 case R_PPC64_PLT16_HA:
14639 case R_PPC64_PLT16_HI:
14640 case R_PPC64_PLT16_LO:
14641 case R_PPC64_PLT32:
14642 case R_PPC64_PLT64:
14643 /* Relocation is to the entry for this symbol in the
14644 procedure linkage table. */
14645 {
14646 struct plt_entry **plt_list = NULL;
14647 if (h != NULL)
14648 plt_list = &h->elf.plt.plist;
14649 else if (local_got_ents != NULL)
14650 {
14651 struct plt_entry **local_plt = (struct plt_entry **)
14652 (local_got_ents + symtab_hdr->sh_info);
14653 unsigned char *local_got_tls_masks = (unsigned char *)
14654 (local_plt + symtab_hdr->sh_info);
14655 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14656 plt_list = local_plt + r_symndx;
14657 }
14658 if (plt_list)
14659 {
14660 struct plt_entry *ent;
14661
14662 for (ent = *plt_list; ent != NULL; ent = ent->next)
14663 if (ent->plt.offset != (bfd_vma) -1
14664 && ent->addend == orig_rel.r_addend)
14665 {
14666 asection *plt;
14667
14668 plt = htab->elf.splt;
14669 if (!htab->elf.dynamic_sections_created
14670 || h == NULL
14671 || h->elf.dynindx == -1)
14672 plt = htab->elf.iplt;
14673 relocation = (plt->output_section->vma
14674 + plt->output_offset
14675 + ent->plt.offset);
14676 addend = 0;
14677 unresolved_reloc = FALSE;
14678 break;
14679 }
14680 }
14681 }
14682 break;
14683
14684 case R_PPC64_TOC:
14685 /* Relocation value is TOC base. */
14686 relocation = TOCstart;
14687 if (r_symndx == STN_UNDEF)
14688 relocation += htab->sec_info[input_section->id].toc_off;
14689 else if (unresolved_reloc)
14690 ;
14691 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14692 relocation += htab->sec_info[sec->id].toc_off;
14693 else
14694 unresolved_reloc = TRUE;
14695 goto dodyn;
14696
14697 /* TOC16 relocs. We want the offset relative to the TOC base,
14698 which is the address of the start of the TOC plus 0x8000.
14699 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14700 in this order. */
14701 case R_PPC64_TOC16:
14702 case R_PPC64_TOC16_LO:
14703 case R_PPC64_TOC16_HI:
14704 case R_PPC64_TOC16_DS:
14705 case R_PPC64_TOC16_LO_DS:
14706 case R_PPC64_TOC16_HA:
14707 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14708 break;
14709
14710 /* Relocate against the beginning of the section. */
14711 case R_PPC64_SECTOFF:
14712 case R_PPC64_SECTOFF_LO:
14713 case R_PPC64_SECTOFF_HI:
14714 case R_PPC64_SECTOFF_DS:
14715 case R_PPC64_SECTOFF_LO_DS:
14716 case R_PPC64_SECTOFF_HA:
14717 if (sec != NULL)
14718 addend -= sec->output_section->vma;
14719 break;
14720
14721 case R_PPC64_REL16:
14722 case R_PPC64_REL16_LO:
14723 case R_PPC64_REL16_HI:
14724 case R_PPC64_REL16_HA:
14725 case R_PPC64_REL16DX_HA:
14726 break;
14727
14728 case R_PPC64_REL14:
14729 case R_PPC64_REL14_BRNTAKEN:
14730 case R_PPC64_REL14_BRTAKEN:
14731 case R_PPC64_REL24:
14732 break;
14733
14734 case R_PPC64_TPREL16:
14735 case R_PPC64_TPREL16_LO:
14736 case R_PPC64_TPREL16_HI:
14737 case R_PPC64_TPREL16_HA:
14738 case R_PPC64_TPREL16_DS:
14739 case R_PPC64_TPREL16_LO_DS:
14740 case R_PPC64_TPREL16_HIGH:
14741 case R_PPC64_TPREL16_HIGHA:
14742 case R_PPC64_TPREL16_HIGHER:
14743 case R_PPC64_TPREL16_HIGHERA:
14744 case R_PPC64_TPREL16_HIGHEST:
14745 case R_PPC64_TPREL16_HIGHESTA:
14746 if (h != NULL
14747 && h->elf.root.type == bfd_link_hash_undefweak
14748 && h->elf.dynindx == -1)
14749 {
14750 /* Make this relocation against an undefined weak symbol
14751 resolve to zero. This is really just a tweak, since
14752 code using weak externs ought to check that they are
14753 defined before using them. */
14754 bfd_byte *p = contents + rel->r_offset - d_offset;
14755
14756 insn = bfd_get_32 (input_bfd, p);
14757 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14758 if (insn != 0)
14759 bfd_put_32 (input_bfd, insn, p);
14760 break;
14761 }
14762 if (htab->elf.tls_sec != NULL)
14763 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14764 if (bfd_link_pic (info))
14765 /* The TPREL16 relocs shouldn't really be used in shared
14766 libs as they will result in DT_TEXTREL being set, but
14767 support them anyway. */
14768 goto dodyn;
14769 break;
14770
14771 case R_PPC64_DTPREL16:
14772 case R_PPC64_DTPREL16_LO:
14773 case R_PPC64_DTPREL16_HI:
14774 case R_PPC64_DTPREL16_HA:
14775 case R_PPC64_DTPREL16_DS:
14776 case R_PPC64_DTPREL16_LO_DS:
14777 case R_PPC64_DTPREL16_HIGH:
14778 case R_PPC64_DTPREL16_HIGHA:
14779 case R_PPC64_DTPREL16_HIGHER:
14780 case R_PPC64_DTPREL16_HIGHERA:
14781 case R_PPC64_DTPREL16_HIGHEST:
14782 case R_PPC64_DTPREL16_HIGHESTA:
14783 if (htab->elf.tls_sec != NULL)
14784 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14785 break;
14786
14787 case R_PPC64_ADDR64_LOCAL:
14788 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14789 ? h->elf.other
14790 : sym->st_other);
14791 break;
14792
14793 case R_PPC64_DTPMOD64:
14794 relocation = 1;
14795 addend = 0;
14796 goto dodyn;
14797
14798 case R_PPC64_TPREL64:
14799 if (htab->elf.tls_sec != NULL)
14800 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14801 goto dodyn;
14802
14803 case R_PPC64_DTPREL64:
14804 if (htab->elf.tls_sec != NULL)
14805 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14806 /* Fall through. */
14807
14808 /* Relocations that may need to be propagated if this is a
14809 dynamic object. */
14810 case R_PPC64_REL30:
14811 case R_PPC64_REL32:
14812 case R_PPC64_REL64:
14813 case R_PPC64_ADDR14:
14814 case R_PPC64_ADDR14_BRNTAKEN:
14815 case R_PPC64_ADDR14_BRTAKEN:
14816 case R_PPC64_ADDR16:
14817 case R_PPC64_ADDR16_DS:
14818 case R_PPC64_ADDR16_HA:
14819 case R_PPC64_ADDR16_HI:
14820 case R_PPC64_ADDR16_HIGH:
14821 case R_PPC64_ADDR16_HIGHA:
14822 case R_PPC64_ADDR16_HIGHER:
14823 case R_PPC64_ADDR16_HIGHERA:
14824 case R_PPC64_ADDR16_HIGHEST:
14825 case R_PPC64_ADDR16_HIGHESTA:
14826 case R_PPC64_ADDR16_LO:
14827 case R_PPC64_ADDR16_LO_DS:
14828 case R_PPC64_ADDR24:
14829 case R_PPC64_ADDR32:
14830 case R_PPC64_ADDR64:
14831 case R_PPC64_UADDR16:
14832 case R_PPC64_UADDR32:
14833 case R_PPC64_UADDR64:
14834 dodyn:
14835 if ((input_section->flags & SEC_ALLOC) == 0)
14836 break;
14837
14838 if (NO_OPD_RELOCS && is_opd)
14839 break;
14840
14841 if (bfd_link_pic (info)
14842 ? ((h == NULL
14843 || h->dyn_relocs != NULL)
14844 && ((h != NULL && pc_dynrelocs (h))
14845 || must_be_dyn_reloc (info, r_type)))
14846 : (h != NULL
14847 ? h->dyn_relocs != NULL
14848 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14849 {
14850 bfd_boolean skip, relocate;
14851 asection *sreloc;
14852 bfd_vma out_off;
14853 long indx = 0;
14854
14855 /* When generating a dynamic object, these relocations
14856 are copied into the output file to be resolved at run
14857 time. */
14858
14859 skip = FALSE;
14860 relocate = FALSE;
14861
14862 out_off = _bfd_elf_section_offset (output_bfd, info,
14863 input_section, rel->r_offset);
14864 if (out_off == (bfd_vma) -1)
14865 skip = TRUE;
14866 else if (out_off == (bfd_vma) -2)
14867 skip = TRUE, relocate = TRUE;
14868 out_off += (input_section->output_section->vma
14869 + input_section->output_offset);
14870 outrel.r_offset = out_off;
14871 outrel.r_addend = rel->r_addend;
14872
14873 /* Optimize unaligned reloc use. */
14874 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14875 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14876 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14877 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14878 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14879 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14880 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14881 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14882 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14883
14884 if (skip)
14885 memset (&outrel, 0, sizeof outrel);
14886 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14887 && !is_opd
14888 && r_type != R_PPC64_TOC)
14889 {
14890 indx = h->elf.dynindx;
14891 BFD_ASSERT (indx != -1);
14892 outrel.r_info = ELF64_R_INFO (indx, r_type);
14893 }
14894 else
14895 {
14896 /* This symbol is local, or marked to become local,
14897 or this is an opd section reloc which must point
14898 at a local function. */
14899 outrel.r_addend += relocation;
14900 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14901 {
14902 if (is_opd && h != NULL)
14903 {
14904 /* Lie about opd entries. This case occurs
14905 when building shared libraries and we
14906 reference a function in another shared
14907 lib. The same thing happens for a weak
14908 definition in an application that's
14909 overridden by a strong definition in a
14910 shared lib. (I believe this is a generic
14911 bug in binutils handling of weak syms.)
14912 In these cases we won't use the opd
14913 entry in this lib. */
14914 unresolved_reloc = FALSE;
14915 }
14916 if (!is_opd
14917 && r_type == R_PPC64_ADDR64
14918 && (h != NULL
14919 ? h->elf.type == STT_GNU_IFUNC
14920 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14921 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14922 else
14923 {
14924 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14925
14926 /* We need to relocate .opd contents for ld.so.
14927 Prelink also wants simple and consistent rules
14928 for relocs. This make all RELATIVE relocs have
14929 *r_offset equal to r_addend. */
14930 relocate = TRUE;
14931 }
14932 }
14933 else
14934 {
14935 if (h != NULL
14936 ? h->elf.type == STT_GNU_IFUNC
14937 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14938 {
14939 info->callbacks->einfo
14940 /* xgettext:c-format */
14941 (_("%H: %s for indirect "
14942 "function `%T' unsupported\n"),
14943 input_bfd, input_section, rel->r_offset,
14944 ppc64_elf_howto_table[r_type]->name,
14945 sym_name);
14946 ret = FALSE;
14947 }
14948 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14949 ;
14950 else if (sec == NULL || sec->owner == NULL)
14951 {
14952 bfd_set_error (bfd_error_bad_value);
14953 return FALSE;
14954 }
14955 else
14956 {
14957 asection *osec;
14958
14959 osec = sec->output_section;
14960 indx = elf_section_data (osec)->dynindx;
14961
14962 if (indx == 0)
14963 {
14964 if ((osec->flags & SEC_READONLY) == 0
14965 && htab->elf.data_index_section != NULL)
14966 osec = htab->elf.data_index_section;
14967 else
14968 osec = htab->elf.text_index_section;
14969 indx = elf_section_data (osec)->dynindx;
14970 }
14971 BFD_ASSERT (indx != 0);
14972
14973 /* We are turning this relocation into one
14974 against a section symbol, so subtract out
14975 the output section's address but not the
14976 offset of the input section in the output
14977 section. */
14978 outrel.r_addend -= osec->vma;
14979 }
14980
14981 outrel.r_info = ELF64_R_INFO (indx, r_type);
14982 }
14983 }
14984
14985 sreloc = elf_section_data (input_section)->sreloc;
14986 if (h != NULL
14987 ? h->elf.type == STT_GNU_IFUNC
14988 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14989 {
14990 sreloc = htab->elf.irelplt;
14991 if (indx == 0)
14992 htab->local_ifunc_resolver = 1;
14993 else if (is_static_defined (&h->elf))
14994 htab->maybe_local_ifunc_resolver = 1;
14995 }
14996 if (sreloc == NULL)
14997 abort ();
14998
14999 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15000 >= sreloc->size)
15001 abort ();
15002 loc = sreloc->contents;
15003 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15004 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15005
15006 /* If this reloc is against an external symbol, it will
15007 be computed at runtime, so there's no need to do
15008 anything now. However, for the sake of prelink ensure
15009 that the section contents are a known value. */
15010 if (! relocate)
15011 {
15012 unresolved_reloc = FALSE;
15013 /* The value chosen here is quite arbitrary as ld.so
15014 ignores section contents except for the special
15015 case of .opd where the contents might be accessed
15016 before relocation. Choose zero, as that won't
15017 cause reloc overflow. */
15018 relocation = 0;
15019 addend = 0;
15020 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15021 to improve backward compatibility with older
15022 versions of ld. */
15023 if (r_type == R_PPC64_ADDR64)
15024 addend = outrel.r_addend;
15025 /* Adjust pc_relative relocs to have zero in *r_offset. */
15026 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15027 addend = outrel.r_offset;
15028 }
15029 }
15030 else if (r_type == R_PPC64_DTPMOD64
15031 && htab->params->tls_get_addr_opt
15032 && htab->tls_get_addr_fd != NULL
15033 && htab->tls_get_addr_fd->elf.plt.plist != NULL)
15034 {
15035 /* Set up for __tls_get_addr_opt stub, when this entry
15036 does not have dynamic relocs. */
15037 relocation = 0;
15038 /* Set up the next word for local dynamic. If it turns
15039 out to be global dynamic, the reloc will overwrite
15040 this value. */
15041 if (rel->r_offset + 16 <= input_section->size)
15042 bfd_put_64 (input_bfd, DTP_OFFSET - TP_OFFSET,
15043 contents + rel->r_offset + 8);
15044 }
15045 else if (r_type == R_PPC64_DTPREL64
15046 && htab->params->tls_get_addr_opt
15047 && htab->tls_get_addr_fd != NULL
15048 && htab->tls_get_addr_fd->elf.plt.plist != NULL
15049 && rel > relocs
15050 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
15051 && rel[-1].r_offset + 8 == rel->r_offset)
15052 {
15053 /* __tls_get_addr_opt stub value. */
15054 addend += DTP_OFFSET - TP_OFFSET;
15055 }
15056 break;
15057
15058 case R_PPC64_COPY:
15059 case R_PPC64_GLOB_DAT:
15060 case R_PPC64_JMP_SLOT:
15061 case R_PPC64_JMP_IREL:
15062 case R_PPC64_RELATIVE:
15063 /* We shouldn't ever see these dynamic relocs in relocatable
15064 files. */
15065 /* Fall through. */
15066
15067 case R_PPC64_PLTGOT16:
15068 case R_PPC64_PLTGOT16_DS:
15069 case R_PPC64_PLTGOT16_HA:
15070 case R_PPC64_PLTGOT16_HI:
15071 case R_PPC64_PLTGOT16_LO:
15072 case R_PPC64_PLTGOT16_LO_DS:
15073 case R_PPC64_PLTREL32:
15074 case R_PPC64_PLTREL64:
15075 /* These ones haven't been implemented yet. */
15076
15077 info->callbacks->einfo
15078 /* xgettext:c-format */
15079 (_("%P: %B: %s is not supported for `%T'\n"),
15080 input_bfd,
15081 ppc64_elf_howto_table[r_type]->name, sym_name);
15082
15083 bfd_set_error (bfd_error_invalid_operation);
15084 ret = FALSE;
15085 goto copy_reloc;
15086 }
15087
15088 /* Multi-instruction sequences that access the TOC can be
15089 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15090 to nop; addi rb,r2,x; */
15091 switch (r_type)
15092 {
15093 default:
15094 break;
15095
15096 case R_PPC64_GOT_TLSLD16_HI:
15097 case R_PPC64_GOT_TLSGD16_HI:
15098 case R_PPC64_GOT_TPREL16_HI:
15099 case R_PPC64_GOT_DTPREL16_HI:
15100 case R_PPC64_GOT16_HI:
15101 case R_PPC64_TOC16_HI:
15102 /* These relocs would only be useful if building up an
15103 offset to later add to r2, perhaps in an indexed
15104 addressing mode instruction. Don't try to optimize.
15105 Unfortunately, the possibility of someone building up an
15106 offset like this or even with the HA relocs, means that
15107 we need to check the high insn when optimizing the low
15108 insn. */
15109 break;
15110
15111 case R_PPC64_GOT_TLSLD16_HA:
15112 case R_PPC64_GOT_TLSGD16_HA:
15113 case R_PPC64_GOT_TPREL16_HA:
15114 case R_PPC64_GOT_DTPREL16_HA:
15115 case R_PPC64_GOT16_HA:
15116 case R_PPC64_TOC16_HA:
15117 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15118 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15119 {
15120 bfd_byte *p = contents + (rel->r_offset & ~3);
15121 bfd_put_32 (input_bfd, NOP, p);
15122 }
15123 break;
15124
15125 case R_PPC64_GOT_TLSLD16_LO:
15126 case R_PPC64_GOT_TLSGD16_LO:
15127 case R_PPC64_GOT_TPREL16_LO_DS:
15128 case R_PPC64_GOT_DTPREL16_LO_DS:
15129 case R_PPC64_GOT16_LO:
15130 case R_PPC64_GOT16_LO_DS:
15131 case R_PPC64_TOC16_LO:
15132 case R_PPC64_TOC16_LO_DS:
15133 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15134 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15135 {
15136 bfd_byte *p = contents + (rel->r_offset & ~3);
15137 insn = bfd_get_32 (input_bfd, p);
15138 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15139 {
15140 /* Transform addic to addi when we change reg. */
15141 insn &= ~((0x3f << 26) | (0x1f << 16));
15142 insn |= (14u << 26) | (2 << 16);
15143 }
15144 else
15145 {
15146 insn &= ~(0x1f << 16);
15147 insn |= 2 << 16;
15148 }
15149 bfd_put_32 (input_bfd, insn, p);
15150 }
15151 break;
15152 }
15153
15154 /* Do any further special processing. */
15155 howto = ppc64_elf_howto_table[(int) r_type];
15156 switch (r_type)
15157 {
15158 default:
15159 break;
15160
15161 case R_PPC64_REL16_HA:
15162 case R_PPC64_REL16DX_HA:
15163 case R_PPC64_ADDR16_HA:
15164 case R_PPC64_ADDR16_HIGHA:
15165 case R_PPC64_ADDR16_HIGHERA:
15166 case R_PPC64_ADDR16_HIGHESTA:
15167 case R_PPC64_TOC16_HA:
15168 case R_PPC64_SECTOFF_HA:
15169 case R_PPC64_TPREL16_HA:
15170 case R_PPC64_TPREL16_HIGHA:
15171 case R_PPC64_TPREL16_HIGHERA:
15172 case R_PPC64_TPREL16_HIGHESTA:
15173 case R_PPC64_DTPREL16_HA:
15174 case R_PPC64_DTPREL16_HIGHA:
15175 case R_PPC64_DTPREL16_HIGHERA:
15176 case R_PPC64_DTPREL16_HIGHESTA:
15177 /* It's just possible that this symbol is a weak symbol
15178 that's not actually defined anywhere. In that case,
15179 'sec' would be NULL, and we should leave the symbol
15180 alone (it will be set to zero elsewhere in the link). */
15181 if (sec == NULL)
15182 break;
15183 /* Fall through. */
15184
15185 case R_PPC64_GOT16_HA:
15186 case R_PPC64_PLTGOT16_HA:
15187 case R_PPC64_PLT16_HA:
15188 case R_PPC64_GOT_TLSGD16_HA:
15189 case R_PPC64_GOT_TLSLD16_HA:
15190 case R_PPC64_GOT_TPREL16_HA:
15191 case R_PPC64_GOT_DTPREL16_HA:
15192 /* Add 0x10000 if sign bit in 0:15 is set.
15193 Bits 0:15 are not used. */
15194 addend += 0x8000;
15195 break;
15196
15197 case R_PPC64_ADDR16_DS:
15198 case R_PPC64_ADDR16_LO_DS:
15199 case R_PPC64_GOT16_DS:
15200 case R_PPC64_GOT16_LO_DS:
15201 case R_PPC64_PLT16_LO_DS:
15202 case R_PPC64_SECTOFF_DS:
15203 case R_PPC64_SECTOFF_LO_DS:
15204 case R_PPC64_TOC16_DS:
15205 case R_PPC64_TOC16_LO_DS:
15206 case R_PPC64_PLTGOT16_DS:
15207 case R_PPC64_PLTGOT16_LO_DS:
15208 case R_PPC64_GOT_TPREL16_DS:
15209 case R_PPC64_GOT_TPREL16_LO_DS:
15210 case R_PPC64_GOT_DTPREL16_DS:
15211 case R_PPC64_GOT_DTPREL16_LO_DS:
15212 case R_PPC64_TPREL16_DS:
15213 case R_PPC64_TPREL16_LO_DS:
15214 case R_PPC64_DTPREL16_DS:
15215 case R_PPC64_DTPREL16_LO_DS:
15216 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15217 mask = 3;
15218 /* If this reloc is against an lq, lxv, or stxv insn, then
15219 the value must be a multiple of 16. This is somewhat of
15220 a hack, but the "correct" way to do this by defining _DQ
15221 forms of all the _DS relocs bloats all reloc switches in
15222 this file. It doesn't make much sense to use these
15223 relocs in data, so testing the insn should be safe. */
15224 if ((insn & (0x3f << 26)) == (56u << 26)
15225 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15226 mask = 15;
15227 relocation += addend;
15228 addend = insn & (mask ^ 3);
15229 if ((relocation & mask) != 0)
15230 {
15231 relocation ^= relocation & mask;
15232 info->callbacks->einfo
15233 /* xgettext:c-format */
15234 (_("%H: error: %s not a multiple of %u\n"),
15235 input_bfd, input_section, rel->r_offset,
15236 howto->name,
15237 mask + 1);
15238 bfd_set_error (bfd_error_bad_value);
15239 ret = FALSE;
15240 goto copy_reloc;
15241 }
15242 break;
15243 }
15244
15245 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15246 because such sections are not SEC_ALLOC and thus ld.so will
15247 not process them. */
15248 if (unresolved_reloc
15249 && !((input_section->flags & SEC_DEBUGGING) != 0
15250 && h->elf.def_dynamic)
15251 && _bfd_elf_section_offset (output_bfd, info, input_section,
15252 rel->r_offset) != (bfd_vma) -1)
15253 {
15254 info->callbacks->einfo
15255 /* xgettext:c-format */
15256 (_("%H: unresolvable %s against `%T'\n"),
15257 input_bfd, input_section, rel->r_offset,
15258 howto->name,
15259 h->elf.root.root.string);
15260 ret = FALSE;
15261 }
15262
15263 /* 16-bit fields in insns mostly have signed values, but a
15264 few insns have 16-bit unsigned values. Really, we should
15265 have different reloc types. */
15266 if (howto->complain_on_overflow != complain_overflow_dont
15267 && howto->dst_mask == 0xffff
15268 && (input_section->flags & SEC_CODE) != 0)
15269 {
15270 enum complain_overflow complain = complain_overflow_signed;
15271
15272 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15273 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15274 complain = complain_overflow_bitfield;
15275 else if (howto->rightshift == 0
15276 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15277 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15278 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15279 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15280 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15281 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15282 complain = complain_overflow_unsigned;
15283 if (howto->complain_on_overflow != complain)
15284 {
15285 alt_howto = *howto;
15286 alt_howto.complain_on_overflow = complain;
15287 howto = &alt_howto;
15288 }
15289 }
15290
15291 if (r_type == R_PPC64_REL16DX_HA)
15292 {
15293 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15294 if (rel->r_offset + 4 > input_section->size)
15295 r = bfd_reloc_outofrange;
15296 else
15297 {
15298 relocation += addend;
15299 relocation -= (rel->r_offset
15300 + input_section->output_offset
15301 + input_section->output_section->vma);
15302 relocation = (bfd_signed_vma) relocation >> 16;
15303 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15304 insn &= ~0x1fffc1;
15305 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15306 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15307 r = bfd_reloc_ok;
15308 if (relocation + 0x8000 > 0xffff)
15309 r = bfd_reloc_overflow;
15310 }
15311 }
15312 else
15313 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15314 rel->r_offset, relocation, addend);
15315
15316 if (r != bfd_reloc_ok)
15317 {
15318 char *more_info = NULL;
15319 const char *reloc_name = howto->name;
15320
15321 if (reloc_dest != DEST_NORMAL)
15322 {
15323 more_info = bfd_malloc (strlen (reloc_name) + 8);
15324 if (more_info != NULL)
15325 {
15326 strcpy (more_info, reloc_name);
15327 strcat (more_info, (reloc_dest == DEST_OPD
15328 ? " (OPD)" : " (stub)"));
15329 reloc_name = more_info;
15330 }
15331 }
15332
15333 if (r == bfd_reloc_overflow)
15334 {
15335 /* On code like "if (foo) foo();" don't report overflow
15336 on a branch to zero when foo is undefined. */
15337 if (!warned
15338 && (reloc_dest == DEST_STUB
15339 || !(h != NULL
15340 && (h->elf.root.type == bfd_link_hash_undefweak
15341 || h->elf.root.type == bfd_link_hash_undefined)
15342 && is_branch_reloc (r_type))))
15343 info->callbacks->reloc_overflow (info, &h->elf.root,
15344 sym_name, reloc_name,
15345 orig_rel.r_addend,
15346 input_bfd, input_section,
15347 rel->r_offset);
15348 }
15349 else
15350 {
15351 info->callbacks->einfo
15352 /* xgettext:c-format */
15353 (_("%H: %s against `%T': error %d\n"),
15354 input_bfd, input_section, rel->r_offset,
15355 reloc_name, sym_name, (int) r);
15356 ret = FALSE;
15357 }
15358 if (more_info != NULL)
15359 free (more_info);
15360 }
15361 copy_reloc:
15362 if (wrel != rel)
15363 *wrel = *rel;
15364 }
15365
15366 if (wrel != rel)
15367 {
15368 Elf_Internal_Shdr *rel_hdr;
15369 size_t deleted = rel - wrel;
15370
15371 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15372 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15373 if (rel_hdr->sh_size == 0)
15374 {
15375 /* It is too late to remove an empty reloc section. Leave
15376 one NONE reloc.
15377 ??? What is wrong with an empty section??? */
15378 rel_hdr->sh_size = rel_hdr->sh_entsize;
15379 deleted -= 1;
15380 }
15381 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15382 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15383 input_section->reloc_count -= deleted;
15384 }
15385
15386 /* If we're emitting relocations, then shortly after this function
15387 returns, reloc offsets and addends for this section will be
15388 adjusted. Worse, reloc symbol indices will be for the output
15389 file rather than the input. Save a copy of the relocs for
15390 opd_entry_value. */
15391 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15392 {
15393 bfd_size_type amt;
15394 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15395 rel = bfd_alloc (input_bfd, amt);
15396 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15397 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15398 if (rel == NULL)
15399 return FALSE;
15400 memcpy (rel, relocs, amt);
15401 }
15402 return ret;
15403 }
15404
15405 /* Adjust the value of any local symbols in opd sections. */
15406
15407 static int
15408 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15409 const char *name ATTRIBUTE_UNUSED,
15410 Elf_Internal_Sym *elfsym,
15411 asection *input_sec,
15412 struct elf_link_hash_entry *h)
15413 {
15414 struct _opd_sec_data *opd;
15415 long adjust;
15416 bfd_vma value;
15417
15418 if (h != NULL)
15419 return 1;
15420
15421 opd = get_opd_info (input_sec);
15422 if (opd == NULL || opd->adjust == NULL)
15423 return 1;
15424
15425 value = elfsym->st_value - input_sec->output_offset;
15426 if (!bfd_link_relocatable (info))
15427 value -= input_sec->output_section->vma;
15428
15429 adjust = opd->adjust[OPD_NDX (value)];
15430 if (adjust == -1)
15431 return 2;
15432
15433 elfsym->st_value += adjust;
15434 return 1;
15435 }
15436
15437 /* Finish up dynamic symbol handling. We set the contents of various
15438 dynamic sections here. */
15439
15440 static bfd_boolean
15441 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15442 struct bfd_link_info *info,
15443 struct elf_link_hash_entry *h,
15444 Elf_Internal_Sym *sym)
15445 {
15446 struct ppc_link_hash_table *htab;
15447 struct plt_entry *ent;
15448 Elf_Internal_Rela rela;
15449 bfd_byte *loc;
15450
15451 htab = ppc_hash_table (info);
15452 if (htab == NULL)
15453 return FALSE;
15454
15455 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15456 if (ent->plt.offset != (bfd_vma) -1)
15457 {
15458 /* This symbol has an entry in the procedure linkage
15459 table. Set it up. */
15460 if (!htab->elf.dynamic_sections_created
15461 || h->dynindx == -1)
15462 {
15463 BFD_ASSERT (h->type == STT_GNU_IFUNC
15464 && h->def_regular
15465 && (h->root.type == bfd_link_hash_defined
15466 || h->root.type == bfd_link_hash_defweak));
15467 rela.r_offset = (htab->elf.iplt->output_section->vma
15468 + htab->elf.iplt->output_offset
15469 + ent->plt.offset);
15470 if (htab->opd_abi)
15471 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15472 else
15473 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15474 rela.r_addend = (h->root.u.def.value
15475 + h->root.u.def.section->output_offset
15476 + h->root.u.def.section->output_section->vma
15477 + ent->addend);
15478 loc = (htab->elf.irelplt->contents
15479 + (htab->elf.irelplt->reloc_count++
15480 * sizeof (Elf64_External_Rela)));
15481 htab->local_ifunc_resolver = 1;
15482 }
15483 else
15484 {
15485 rela.r_offset = (htab->elf.splt->output_section->vma
15486 + htab->elf.splt->output_offset
15487 + ent->plt.offset);
15488 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15489 rela.r_addend = ent->addend;
15490 loc = (htab->elf.srelplt->contents
15491 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15492 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15493 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15494 htab->maybe_local_ifunc_resolver = 1;
15495 }
15496 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15497
15498 if (!htab->opd_abi)
15499 {
15500 if (!h->def_regular)
15501 {
15502 /* Mark the symbol as undefined, rather than as
15503 defined in glink. Leave the value if there were
15504 any relocations where pointer equality matters
15505 (this is a clue for the dynamic linker, to make
15506 function pointer comparisons work between an
15507 application and shared library), otherwise set it
15508 to zero. */
15509 sym->st_shndx = SHN_UNDEF;
15510 if (!h->pointer_equality_needed)
15511 sym->st_value = 0;
15512 else if (!h->ref_regular_nonweak)
15513 {
15514 /* This breaks function pointer comparisons, but
15515 that is better than breaking tests for a NULL
15516 function pointer. */
15517 sym->st_value = 0;
15518 }
15519 }
15520 }
15521 }
15522
15523 if (h->needs_copy)
15524 {
15525 /* This symbol needs a copy reloc. Set it up. */
15526 asection *srel;
15527
15528 if (h->dynindx == -1
15529 || (h->root.type != bfd_link_hash_defined
15530 && h->root.type != bfd_link_hash_defweak)
15531 || htab->elf.srelbss == NULL
15532 || htab->elf.sreldynrelro == NULL)
15533 abort ();
15534
15535 rela.r_offset = (h->root.u.def.value
15536 + h->root.u.def.section->output_section->vma
15537 + h->root.u.def.section->output_offset);
15538 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15539 rela.r_addend = 0;
15540 if (h->root.u.def.section == htab->elf.sdynrelro)
15541 srel = htab->elf.sreldynrelro;
15542 else
15543 srel = htab->elf.srelbss;
15544 loc = srel->contents;
15545 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15546 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15547 }
15548
15549 return TRUE;
15550 }
15551
15552 /* Used to decide how to sort relocs in an optimal manner for the
15553 dynamic linker, before writing them out. */
15554
15555 static enum elf_reloc_type_class
15556 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15557 const asection *rel_sec,
15558 const Elf_Internal_Rela *rela)
15559 {
15560 enum elf_ppc64_reloc_type r_type;
15561 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15562
15563 if (rel_sec == htab->elf.irelplt)
15564 return reloc_class_ifunc;
15565
15566 r_type = ELF64_R_TYPE (rela->r_info);
15567 switch (r_type)
15568 {
15569 case R_PPC64_RELATIVE:
15570 return reloc_class_relative;
15571 case R_PPC64_JMP_SLOT:
15572 return reloc_class_plt;
15573 case R_PPC64_COPY:
15574 return reloc_class_copy;
15575 default:
15576 return reloc_class_normal;
15577 }
15578 }
15579
15580 /* Finish up the dynamic sections. */
15581
15582 static bfd_boolean
15583 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15584 struct bfd_link_info *info)
15585 {
15586 struct ppc_link_hash_table *htab;
15587 bfd *dynobj;
15588 asection *sdyn;
15589
15590 htab = ppc_hash_table (info);
15591 if (htab == NULL)
15592 return FALSE;
15593
15594 dynobj = htab->elf.dynobj;
15595 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15596
15597 if (htab->elf.dynamic_sections_created)
15598 {
15599 Elf64_External_Dyn *dyncon, *dynconend;
15600
15601 if (sdyn == NULL || htab->elf.sgot == NULL)
15602 abort ();
15603
15604 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15605 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15606 for (; dyncon < dynconend; dyncon++)
15607 {
15608 Elf_Internal_Dyn dyn;
15609 asection *s;
15610
15611 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15612
15613 switch (dyn.d_tag)
15614 {
15615 default:
15616 continue;
15617
15618 case DT_PPC64_GLINK:
15619 s = htab->glink;
15620 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15621 /* We stupidly defined DT_PPC64_GLINK to be the start
15622 of glink rather than the first entry point, which is
15623 what ld.so needs, and now have a bigger stub to
15624 support automatic multiple TOCs. */
15625 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15626 break;
15627
15628 case DT_PPC64_OPD:
15629 s = bfd_get_section_by_name (output_bfd, ".opd");
15630 if (s == NULL)
15631 continue;
15632 dyn.d_un.d_ptr = s->vma;
15633 break;
15634
15635 case DT_PPC64_OPT:
15636 if (htab->do_multi_toc && htab->multi_toc_needed)
15637 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15638 break;
15639
15640 case DT_PPC64_OPDSZ:
15641 s = bfd_get_section_by_name (output_bfd, ".opd");
15642 if (s == NULL)
15643 continue;
15644 dyn.d_un.d_val = s->size;
15645 break;
15646
15647 case DT_PLTGOT:
15648 s = htab->elf.splt;
15649 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15650 break;
15651
15652 case DT_JMPREL:
15653 s = htab->elf.srelplt;
15654 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15655 break;
15656
15657 case DT_PLTRELSZ:
15658 dyn.d_un.d_val = htab->elf.srelplt->size;
15659 break;
15660
15661 case DT_TEXTREL:
15662 if (htab->local_ifunc_resolver)
15663 info->callbacks->einfo
15664 (_("%X%P: text relocations and GNU indirect "
15665 "functions will result in a segfault at runtime\n"));
15666 else if (htab->maybe_local_ifunc_resolver)
15667 info->callbacks->einfo
15668 (_("%P: warning: text relocations and GNU indirect "
15669 "functions may result in a segfault at runtime\n"));
15670 continue;
15671 }
15672
15673 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15674 }
15675 }
15676
15677 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15678 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15679 {
15680 /* Fill in the first entry in the global offset table.
15681 We use it to hold the link-time TOCbase. */
15682 bfd_put_64 (output_bfd,
15683 elf_gp (output_bfd) + TOC_BASE_OFF,
15684 htab->elf.sgot->contents);
15685
15686 /* Set .got entry size. */
15687 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15688 }
15689
15690 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15691 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15692 {
15693 /* Set .plt entry size. */
15694 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15695 = PLT_ENTRY_SIZE (htab);
15696 }
15697
15698 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15699 brlt ourselves if emitrelocations. */
15700 if (htab->brlt != NULL
15701 && htab->brlt->reloc_count != 0
15702 && !_bfd_elf_link_output_relocs (output_bfd,
15703 htab->brlt,
15704 elf_section_data (htab->brlt)->rela.hdr,
15705 elf_section_data (htab->brlt)->relocs,
15706 NULL))
15707 return FALSE;
15708
15709 if (htab->glink != NULL
15710 && htab->glink->reloc_count != 0
15711 && !_bfd_elf_link_output_relocs (output_bfd,
15712 htab->glink,
15713 elf_section_data (htab->glink)->rela.hdr,
15714 elf_section_data (htab->glink)->relocs,
15715 NULL))
15716 return FALSE;
15717
15718 if (htab->glink_eh_frame != NULL
15719 && htab->glink_eh_frame->size != 0)
15720 {
15721 bfd_vma val;
15722 bfd_byte *p;
15723 asection *stub_sec;
15724 size_t align = 4;
15725
15726 p = htab->glink_eh_frame->contents;
15727 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15728 for (stub_sec = htab->params->stub_bfd->sections;
15729 stub_sec != NULL;
15730 stub_sec = stub_sec->next)
15731 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15732 {
15733 /* FDE length. */
15734 p += 4;
15735 /* CIE pointer. */
15736 p += 4;
15737 /* Offset to stub section. */
15738 val = (stub_sec->output_section->vma
15739 + stub_sec->output_offset);
15740 val -= (htab->glink_eh_frame->output_section->vma
15741 + htab->glink_eh_frame->output_offset
15742 + (p - htab->glink_eh_frame->contents));
15743 if (val + 0x80000000 > 0xffffffff)
15744 {
15745 info->callbacks->einfo
15746 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15747 stub_sec->name);
15748 return FALSE;
15749 }
15750 bfd_put_32 (dynobj, val, p);
15751 p += 4;
15752 /* stub section size. */
15753 p += 4;
15754 /* Augmentation. */
15755 p += 1;
15756 /* Pad. */
15757 p += ((17 + align - 1) & -align) - 17;
15758 }
15759 if (htab->glink != NULL && htab->glink->size != 0)
15760 {
15761 /* FDE length. */
15762 p += 4;
15763 /* CIE pointer. */
15764 p += 4;
15765 /* Offset to .glink. */
15766 val = (htab->glink->output_section->vma
15767 + htab->glink->output_offset
15768 + 8);
15769 val -= (htab->glink_eh_frame->output_section->vma
15770 + htab->glink_eh_frame->output_offset
15771 + (p - htab->glink_eh_frame->contents));
15772 if (val + 0x80000000 > 0xffffffff)
15773 {
15774 info->callbacks->einfo
15775 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15776 htab->glink->name);
15777 return FALSE;
15778 }
15779 bfd_put_32 (dynobj, val, p);
15780 p += 4;
15781 /* .glink size. */
15782 p += 4;
15783 /* Augmentation. */
15784 p += 1;
15785 /* Ops. */
15786 p += 7;
15787 p += ((24 + align - 1) & -align) - 24;
15788 }
15789
15790 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15791 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15792 htab->glink_eh_frame,
15793 htab->glink_eh_frame->contents))
15794 return FALSE;
15795 }
15796
15797 /* We need to handle writing out multiple GOT sections ourselves,
15798 since we didn't add them to DYNOBJ. We know dynobj is the first
15799 bfd. */
15800 while ((dynobj = dynobj->link.next) != NULL)
15801 {
15802 asection *s;
15803
15804 if (!is_ppc64_elf (dynobj))
15805 continue;
15806
15807 s = ppc64_elf_tdata (dynobj)->got;
15808 if (s != NULL
15809 && s->size != 0
15810 && s->output_section != bfd_abs_section_ptr
15811 && !bfd_set_section_contents (output_bfd, s->output_section,
15812 s->contents, s->output_offset,
15813 s->size))
15814 return FALSE;
15815 s = ppc64_elf_tdata (dynobj)->relgot;
15816 if (s != NULL
15817 && s->size != 0
15818 && s->output_section != bfd_abs_section_ptr
15819 && !bfd_set_section_contents (output_bfd, s->output_section,
15820 s->contents, s->output_offset,
15821 s->size))
15822 return FALSE;
15823 }
15824
15825 return TRUE;
15826 }
15827
15828 #include "elf64-target.h"
15829
15830 /* FreeBSD support */
15831
15832 #undef TARGET_LITTLE_SYM
15833 #undef TARGET_LITTLE_NAME
15834
15835 #undef TARGET_BIG_SYM
15836 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15837 #undef TARGET_BIG_NAME
15838 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15839
15840 #undef ELF_OSABI
15841 #define ELF_OSABI ELFOSABI_FREEBSD
15842
15843 #undef elf64_bed
15844 #define elf64_bed elf64_powerpc_fbsd_bed
15845
15846 #include "elf64-target.h"
15847