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Delete powerpc64 symbol weakref field
[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_relocs_compatible _bfd_elf_relocs_compatible
105 #define elf_backend_gc_keep ppc64_elf_gc_keep
106 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
107 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_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 syms = NULL;
3274 codesecsym = 0;
3275 codesecsymend = 0;
3276 secsymend = 0;
3277 opdsymend = 0;
3278 symcount = 0;
3279 if (opd != NULL)
3280 {
3281 symcount = static_count;
3282 if (!relocatable)
3283 symcount += dyn_count;
3284 if (symcount == 0)
3285 return 0;
3286
3287 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3288 if (syms == NULL)
3289 return -1;
3290
3291 if (!relocatable && static_count != 0 && dyn_count != 0)
3292 {
3293 /* Use both symbol tables. */
3294 memcpy (syms, static_syms, static_count * sizeof (*syms));
3295 memcpy (syms + static_count, dyn_syms,
3296 (dyn_count + 1) * sizeof (*syms));
3297 }
3298 else if (!relocatable && static_count == 0)
3299 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3300 else
3301 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3302
3303 synthetic_relocatable = relocatable;
3304 synthetic_opd = opd;
3305 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3306
3307 if (!relocatable && symcount > 1)
3308 {
3309 long j;
3310 /* Trim duplicate syms, since we may have merged the normal and
3311 dynamic symbols. Actually, we only care about syms that have
3312 different values, so trim any with the same value. */
3313 for (i = 1, j = 1; i < symcount; ++i)
3314 if (syms[i - 1]->value + syms[i - 1]->section->vma
3315 != syms[i]->value + syms[i]->section->vma)
3316 syms[j++] = syms[i];
3317 symcount = j;
3318 }
3319
3320 i = 0;
3321 /* Note that here and in compare_symbols we can't compare opd and
3322 sym->section directly. With separate debug info files, the
3323 symbols will be extracted from the debug file while abfd passed
3324 to this function is the real binary. */
3325 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3326 ++i;
3327 codesecsym = i;
3328
3329 for (; i < symcount; ++i)
3330 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC
3331 | SEC_THREAD_LOCAL))
3332 != (SEC_CODE | SEC_ALLOC))
3333 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3334 break;
3335 codesecsymend = i;
3336
3337 for (; i < symcount; ++i)
3338 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3339 break;
3340 secsymend = i;
3341
3342 for (; i < symcount; ++i)
3343 if (strcmp (syms[i]->section->name, ".opd") != 0)
3344 break;
3345 opdsymend = i;
3346
3347 for (; i < symcount; ++i)
3348 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3349 != (SEC_CODE | SEC_ALLOC))
3350 break;
3351 symcount = i;
3352 }
3353 count = 0;
3354
3355 if (relocatable)
3356 {
3357 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3358 arelent *r;
3359 size_t size;
3360 long relcount;
3361
3362 if (opdsymend == secsymend)
3363 goto done;
3364
3365 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3366 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3367 if (relcount == 0)
3368 goto done;
3369
3370 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3371 {
3372 count = -1;
3373 goto done;
3374 }
3375
3376 size = 0;
3377 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3378 {
3379 asymbol *sym;
3380
3381 while (r < opd->relocation + relcount
3382 && r->address < syms[i]->value + opd->vma)
3383 ++r;
3384
3385 if (r == opd->relocation + relcount)
3386 break;
3387
3388 if (r->address != syms[i]->value + opd->vma)
3389 continue;
3390
3391 if (r->howto->type != R_PPC64_ADDR64)
3392 continue;
3393
3394 sym = *r->sym_ptr_ptr;
3395 if (!sym_exists_at (syms, opdsymend, symcount,
3396 sym->section->id, sym->value + r->addend))
3397 {
3398 ++count;
3399 size += sizeof (asymbol);
3400 size += strlen (syms[i]->name) + 2;
3401 }
3402 }
3403
3404 if (size == 0)
3405 goto done;
3406 s = *ret = bfd_malloc (size);
3407 if (s == NULL)
3408 {
3409 count = -1;
3410 goto done;
3411 }
3412
3413 names = (char *) (s + count);
3414
3415 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3416 {
3417 asymbol *sym;
3418
3419 while (r < opd->relocation + relcount
3420 && r->address < syms[i]->value + opd->vma)
3421 ++r;
3422
3423 if (r == opd->relocation + relcount)
3424 break;
3425
3426 if (r->address != syms[i]->value + opd->vma)
3427 continue;
3428
3429 if (r->howto->type != R_PPC64_ADDR64)
3430 continue;
3431
3432 sym = *r->sym_ptr_ptr;
3433 if (!sym_exists_at (syms, opdsymend, symcount,
3434 sym->section->id, sym->value + r->addend))
3435 {
3436 size_t len;
3437
3438 *s = *syms[i];
3439 s->flags |= BSF_SYNTHETIC;
3440 s->section = sym->section;
3441 s->value = sym->value + r->addend;
3442 s->name = names;
3443 *names++ = '.';
3444 len = strlen (syms[i]->name);
3445 memcpy (names, syms[i]->name, len + 1);
3446 names += len + 1;
3447 /* Have udata.p point back to the original symbol this
3448 synthetic symbol was derived from. */
3449 s->udata.p = syms[i];
3450 s++;
3451 }
3452 }
3453 }
3454 else
3455 {
3456 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3457 bfd_byte *contents = NULL;
3458 size_t size;
3459 long plt_count = 0;
3460 bfd_vma glink_vma = 0, resolv_vma = 0;
3461 asection *dynamic, *glink = NULL, *relplt = NULL;
3462 arelent *p;
3463
3464 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3465 {
3466 free_contents_and_exit_err:
3467 count = -1;
3468 free_contents_and_exit:
3469 if (contents)
3470 free (contents);
3471 goto done;
3472 }
3473
3474 size = 0;
3475 for (i = secsymend; i < opdsymend; ++i)
3476 {
3477 bfd_vma ent;
3478
3479 /* Ignore bogus symbols. */
3480 if (syms[i]->value > opd->size - 8)
3481 continue;
3482
3483 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3484 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3485 {
3486 ++count;
3487 size += sizeof (asymbol);
3488 size += strlen (syms[i]->name) + 2;
3489 }
3490 }
3491
3492 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3493 if (dyn_count != 0
3494 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3495 {
3496 bfd_byte *dynbuf, *extdyn, *extdynend;
3497 size_t extdynsize;
3498 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3499
3500 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3501 goto free_contents_and_exit_err;
3502
3503 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3504 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3505
3506 extdyn = dynbuf;
3507 extdynend = extdyn + dynamic->size;
3508 for (; extdyn < extdynend; extdyn += extdynsize)
3509 {
3510 Elf_Internal_Dyn dyn;
3511 (*swap_dyn_in) (abfd, extdyn, &dyn);
3512
3513 if (dyn.d_tag == DT_NULL)
3514 break;
3515
3516 if (dyn.d_tag == DT_PPC64_GLINK)
3517 {
3518 /* The first glink stub starts at offset 32; see
3519 comment in ppc64_elf_finish_dynamic_sections. */
3520 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3521 /* The .glink section usually does not survive the final
3522 link; search for the section (usually .text) where the
3523 glink stubs now reside. */
3524 glink = bfd_sections_find_if (abfd, section_covers_vma,
3525 &glink_vma);
3526 break;
3527 }
3528 }
3529
3530 free (dynbuf);
3531 }
3532
3533 if (glink != NULL)
3534 {
3535 /* Determine __glink trampoline by reading the relative branch
3536 from the first glink stub. */
3537 bfd_byte buf[4];
3538 unsigned int off = 0;
3539
3540 while (bfd_get_section_contents (abfd, glink, buf,
3541 glink_vma + off - glink->vma, 4))
3542 {
3543 unsigned int insn = bfd_get_32 (abfd, buf);
3544 insn ^= B_DOT;
3545 if ((insn & ~0x3fffffc) == 0)
3546 {
3547 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3548 break;
3549 }
3550 off += 4;
3551 if (off > 4)
3552 break;
3553 }
3554
3555 if (resolv_vma)
3556 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3557
3558 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3559 if (relplt != NULL)
3560 {
3561 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3562 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3563 goto free_contents_and_exit_err;
3564
3565 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3566 size += plt_count * sizeof (asymbol);
3567
3568 p = relplt->relocation;
3569 for (i = 0; i < plt_count; i++, p++)
3570 {
3571 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3572 if (p->addend != 0)
3573 size += sizeof ("+0x") - 1 + 16;
3574 }
3575 }
3576 }
3577
3578 if (size == 0)
3579 goto free_contents_and_exit;
3580 s = *ret = bfd_malloc (size);
3581 if (s == NULL)
3582 goto free_contents_and_exit_err;
3583
3584 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3585
3586 for (i = secsymend; i < opdsymend; ++i)
3587 {
3588 bfd_vma ent;
3589
3590 if (syms[i]->value > opd->size - 8)
3591 continue;
3592
3593 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3594 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3595 {
3596 long lo, hi;
3597 size_t len;
3598 asection *sec = abfd->sections;
3599
3600 *s = *syms[i];
3601 lo = codesecsym;
3602 hi = codesecsymend;
3603 while (lo < hi)
3604 {
3605 long mid = (lo + hi) >> 1;
3606 if (syms[mid]->section->vma < ent)
3607 lo = mid + 1;
3608 else if (syms[mid]->section->vma > ent)
3609 hi = mid;
3610 else
3611 {
3612 sec = syms[mid]->section;
3613 break;
3614 }
3615 }
3616
3617 if (lo >= hi && lo > codesecsym)
3618 sec = syms[lo - 1]->section;
3619
3620 for (; sec != NULL; sec = sec->next)
3621 {
3622 if (sec->vma > ent)
3623 break;
3624 /* SEC_LOAD may not be set if SEC is from a separate debug
3625 info file. */
3626 if ((sec->flags & SEC_ALLOC) == 0)
3627 break;
3628 if ((sec->flags & SEC_CODE) != 0)
3629 s->section = sec;
3630 }
3631 s->flags |= BSF_SYNTHETIC;
3632 s->value = ent - s->section->vma;
3633 s->name = names;
3634 *names++ = '.';
3635 len = strlen (syms[i]->name);
3636 memcpy (names, syms[i]->name, len + 1);
3637 names += len + 1;
3638 /* Have udata.p point back to the original symbol this
3639 synthetic symbol was derived from. */
3640 s->udata.p = syms[i];
3641 s++;
3642 }
3643 }
3644 free (contents);
3645
3646 if (glink != NULL && relplt != NULL)
3647 {
3648 if (resolv_vma)
3649 {
3650 /* Add a symbol for the main glink trampoline. */
3651 memset (s, 0, sizeof *s);
3652 s->the_bfd = abfd;
3653 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3654 s->section = glink;
3655 s->value = resolv_vma - glink->vma;
3656 s->name = names;
3657 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3658 names += sizeof ("__glink_PLTresolve");
3659 s++;
3660 count++;
3661 }
3662
3663 /* FIXME: It would be very much nicer to put sym@plt on the
3664 stub rather than on the glink branch table entry. The
3665 objdump disassembler would then use a sensible symbol
3666 name on plt calls. The difficulty in doing so is
3667 a) finding the stubs, and,
3668 b) matching stubs against plt entries, and,
3669 c) there can be multiple stubs for a given plt entry.
3670
3671 Solving (a) could be done by code scanning, but older
3672 ppc64 binaries used different stubs to current code.
3673 (b) is the tricky one since you need to known the toc
3674 pointer for at least one function that uses a pic stub to
3675 be able to calculate the plt address referenced.
3676 (c) means gdb would need to set multiple breakpoints (or
3677 find the glink branch itself) when setting breakpoints
3678 for pending shared library loads. */
3679 p = relplt->relocation;
3680 for (i = 0; i < plt_count; i++, p++)
3681 {
3682 size_t len;
3683
3684 *s = **p->sym_ptr_ptr;
3685 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3686 we are defining a symbol, ensure one of them is set. */
3687 if ((s->flags & BSF_LOCAL) == 0)
3688 s->flags |= BSF_GLOBAL;
3689 s->flags |= BSF_SYNTHETIC;
3690 s->section = glink;
3691 s->value = glink_vma - glink->vma;
3692 s->name = names;
3693 s->udata.p = NULL;
3694 len = strlen ((*p->sym_ptr_ptr)->name);
3695 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3696 names += len;
3697 if (p->addend != 0)
3698 {
3699 memcpy (names, "+0x", sizeof ("+0x") - 1);
3700 names += sizeof ("+0x") - 1;
3701 bfd_sprintf_vma (abfd, names, p->addend);
3702 names += strlen (names);
3703 }
3704 memcpy (names, "@plt", sizeof ("@plt"));
3705 names += sizeof ("@plt");
3706 s++;
3707 if (abi < 2)
3708 {
3709 glink_vma += 8;
3710 if (i >= 0x8000)
3711 glink_vma += 4;
3712 }
3713 else
3714 glink_vma += 4;
3715 }
3716 count += plt_count;
3717 }
3718 }
3719
3720 done:
3721 free (syms);
3722 return count;
3723 }
3724 \f
3725 /* The following functions are specific to the ELF linker, while
3726 functions above are used generally. Those named ppc64_elf_* are
3727 called by the main ELF linker code. They appear in this file more
3728 or less in the order in which they are called. eg.
3729 ppc64_elf_check_relocs is called early in the link process,
3730 ppc64_elf_finish_dynamic_sections is one of the last functions
3731 called.
3732
3733 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3734 functions have both a function code symbol and a function descriptor
3735 symbol. A call to foo in a relocatable object file looks like:
3736
3737 . .text
3738 . x:
3739 . bl .foo
3740 . nop
3741
3742 The function definition in another object file might be:
3743
3744 . .section .opd
3745 . foo: .quad .foo
3746 . .quad .TOC.@tocbase
3747 . .quad 0
3748 .
3749 . .text
3750 . .foo: blr
3751
3752 When the linker resolves the call during a static link, the branch
3753 unsurprisingly just goes to .foo and the .opd information is unused.
3754 If the function definition is in a shared library, things are a little
3755 different: The call goes via a plt call stub, the opd information gets
3756 copied to the plt, and the linker patches the nop.
3757
3758 . x:
3759 . bl .foo_stub
3760 . ld 2,40(1)
3761 .
3762 .
3763 . .foo_stub:
3764 . std 2,40(1) # in practice, the call stub
3765 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3766 . addi 11,11,Lfoo@toc@l # this is the general idea
3767 . ld 12,0(11)
3768 . ld 2,8(11)
3769 . mtctr 12
3770 . ld 11,16(11)
3771 . bctr
3772 .
3773 . .section .plt
3774 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3775
3776 The "reloc ()" notation is supposed to indicate that the linker emits
3777 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3778 copying.
3779
3780 What are the difficulties here? Well, firstly, the relocations
3781 examined by the linker in check_relocs are against the function code
3782 sym .foo, while the dynamic relocation in the plt is emitted against
3783 the function descriptor symbol, foo. Somewhere along the line, we need
3784 to carefully copy dynamic link information from one symbol to the other.
3785 Secondly, the generic part of the elf linker will make .foo a dynamic
3786 symbol as is normal for most other backends. We need foo dynamic
3787 instead, at least for an application final link. However, when
3788 creating a shared library containing foo, we need to have both symbols
3789 dynamic so that references to .foo are satisfied during the early
3790 stages of linking. Otherwise the linker might decide to pull in a
3791 definition from some other object, eg. a static library.
3792
3793 Update: As of August 2004, we support a new convention. Function
3794 calls may use the function descriptor symbol, ie. "bl foo". This
3795 behaves exactly as "bl .foo". */
3796
3797 /* Of those relocs that might be copied as dynamic relocs, this
3798 function selects those that must be copied when linking a shared
3799 library or PIE, even when the symbol is local. */
3800
3801 static int
3802 must_be_dyn_reloc (struct bfd_link_info *info,
3803 enum elf_ppc64_reloc_type r_type)
3804 {
3805 switch (r_type)
3806 {
3807 default:
3808 /* Only relative relocs can be resolved when the object load
3809 address isn't fixed. DTPREL64 is excluded because the
3810 dynamic linker needs to differentiate global dynamic from
3811 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3812 return 1;
3813
3814 case R_PPC64_REL32:
3815 case R_PPC64_REL64:
3816 case R_PPC64_REL30:
3817 return 0;
3818
3819 case R_PPC64_TPREL16:
3820 case R_PPC64_TPREL16_LO:
3821 case R_PPC64_TPREL16_HI:
3822 case R_PPC64_TPREL16_HA:
3823 case R_PPC64_TPREL16_DS:
3824 case R_PPC64_TPREL16_LO_DS:
3825 case R_PPC64_TPREL16_HIGH:
3826 case R_PPC64_TPREL16_HIGHA:
3827 case R_PPC64_TPREL16_HIGHER:
3828 case R_PPC64_TPREL16_HIGHERA:
3829 case R_PPC64_TPREL16_HIGHEST:
3830 case R_PPC64_TPREL16_HIGHESTA:
3831 case R_PPC64_TPREL64:
3832 /* These relocations are relative but in a shared library the
3833 linker doesn't know the thread pointer base. */
3834 return bfd_link_dll (info);
3835 }
3836 }
3837
3838 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3839 copying dynamic variables from a shared lib into an app's dynbss
3840 section, and instead use a dynamic relocation to point into the
3841 shared lib. With code that gcc generates, it's vital that this be
3842 enabled; In the PowerPC64 ABI, the address of a function is actually
3843 the address of a function descriptor, which resides in the .opd
3844 section. gcc uses the descriptor directly rather than going via the
3845 GOT as some other ABI's do, which means that initialized function
3846 pointers must reference the descriptor. Thus, a function pointer
3847 initialized to the address of a function in a shared library will
3848 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3849 redefines the function descriptor symbol to point to the copy. This
3850 presents a problem as a plt entry for that function is also
3851 initialized from the function descriptor symbol and the copy reloc
3852 may not be initialized first. */
3853 #define ELIMINATE_COPY_RELOCS 1
3854
3855 /* Section name for stubs is the associated section name plus this
3856 string. */
3857 #define STUB_SUFFIX ".stub"
3858
3859 /* Linker stubs.
3860 ppc_stub_long_branch:
3861 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3862 destination, but a 24 bit branch in a stub section will reach.
3863 . b dest
3864
3865 ppc_stub_plt_branch:
3866 Similar to the above, but a 24 bit branch in the stub section won't
3867 reach its destination.
3868 . addis %r11,%r2,xxx@toc@ha
3869 . ld %r12,xxx@toc@l(%r11)
3870 . mtctr %r12
3871 . bctr
3872
3873 ppc_stub_plt_call:
3874 Used to call a function in a shared library. If it so happens that
3875 the plt entry referenced crosses a 64k boundary, then an extra
3876 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3877 . std %r2,40(%r1)
3878 . addis %r11,%r2,xxx@toc@ha
3879 . ld %r12,xxx+0@toc@l(%r11)
3880 . mtctr %r12
3881 . ld %r2,xxx+8@toc@l(%r11)
3882 . ld %r11,xxx+16@toc@l(%r11)
3883 . bctr
3884
3885 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3886 code to adjust the value and save r2 to support multiple toc sections.
3887 A ppc_stub_long_branch with an r2 offset looks like:
3888 . std %r2,40(%r1)
3889 . addis %r2,%r2,off@ha
3890 . addi %r2,%r2,off@l
3891 . b dest
3892
3893 A ppc_stub_plt_branch with an r2 offset looks like:
3894 . std %r2,40(%r1)
3895 . addis %r11,%r2,xxx@toc@ha
3896 . ld %r12,xxx@toc@l(%r11)
3897 . addis %r2,%r2,off@ha
3898 . addi %r2,%r2,off@l
3899 . mtctr %r12
3900 . bctr
3901
3902 In cases where the "addis" instruction would add zero, the "addis" is
3903 omitted and following instructions modified slightly in some cases.
3904 */
3905
3906 enum ppc_stub_type {
3907 ppc_stub_none,
3908 ppc_stub_long_branch,
3909 ppc_stub_long_branch_r2off,
3910 ppc_stub_plt_branch,
3911 ppc_stub_plt_branch_r2off,
3912 ppc_stub_plt_call,
3913 ppc_stub_plt_call_r2save,
3914 ppc_stub_global_entry,
3915 ppc_stub_save_res
3916 };
3917
3918 /* Information on stub grouping. */
3919 struct map_stub
3920 {
3921 /* The stub section. */
3922 asection *stub_sec;
3923 /* This is the section to which stubs in the group will be attached. */
3924 asection *link_sec;
3925 /* Next group. */
3926 struct map_stub *next;
3927 /* Whether to emit a copy of register save/restore functions in this
3928 group. */
3929 int needs_save_res;
3930 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3931 or -1u if no such stub with bctrl exists. */
3932 unsigned int tls_get_addr_opt_bctrl;
3933 };
3934
3935 struct ppc_stub_hash_entry {
3936
3937 /* Base hash table entry structure. */
3938 struct bfd_hash_entry root;
3939
3940 enum ppc_stub_type stub_type;
3941
3942 /* Group information. */
3943 struct map_stub *group;
3944
3945 /* Offset within stub_sec of the beginning of this stub. */
3946 bfd_vma stub_offset;
3947
3948 /* Given the symbol's value and its section we can determine its final
3949 value when building the stubs (so the stub knows where to jump. */
3950 bfd_vma target_value;
3951 asection *target_section;
3952
3953 /* The symbol table entry, if any, that this was derived from. */
3954 struct ppc_link_hash_entry *h;
3955 struct plt_entry *plt_ent;
3956
3957 /* Symbol st_other. */
3958 unsigned char other;
3959 };
3960
3961 struct ppc_branch_hash_entry {
3962
3963 /* Base hash table entry structure. */
3964 struct bfd_hash_entry root;
3965
3966 /* Offset within branch lookup table. */
3967 unsigned int offset;
3968
3969 /* Generation marker. */
3970 unsigned int iter;
3971 };
3972
3973 /* Used to track dynamic relocations for local symbols. */
3974 struct ppc_dyn_relocs
3975 {
3976 struct ppc_dyn_relocs *next;
3977
3978 /* The input section of the reloc. */
3979 asection *sec;
3980
3981 /* Total number of relocs copied for the input section. */
3982 unsigned int count : 31;
3983
3984 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3985 unsigned int ifunc : 1;
3986 };
3987
3988 struct ppc_link_hash_entry
3989 {
3990 struct elf_link_hash_entry elf;
3991
3992 union {
3993 /* A pointer to the most recently used stub hash entry against this
3994 symbol. */
3995 struct ppc_stub_hash_entry *stub_cache;
3996
3997 /* A pointer to the next symbol starting with a '.' */
3998 struct ppc_link_hash_entry *next_dot_sym;
3999 } u;
4000
4001 /* Track dynamic relocs copied for this symbol. */
4002 struct elf_dyn_relocs *dyn_relocs;
4003
4004 /* Link between function code and descriptor symbols. */
4005 struct ppc_link_hash_entry *oh;
4006
4007 /* Flag function code and descriptor symbols. */
4008 unsigned int is_func:1;
4009 unsigned int is_func_descriptor:1;
4010 unsigned int fake:1;
4011
4012 /* Whether global opd/toc sym has been adjusted or not.
4013 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4014 should be set for all globals defined in any opd/toc section. */
4015 unsigned int adjust_done:1;
4016
4017 /* Set if this is an out-of-line register save/restore function,
4018 with non-standard calling convention. */
4019 unsigned int save_res:1;
4020
4021 /* Set if a duplicate symbol with non-zero localentry is detected,
4022 even when the duplicate symbol does not provide a definition. */
4023 unsigned int non_zero_localentry:1;
4024
4025 /* Contexts in which symbol is used in the GOT (or TOC).
4026 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4027 corresponding relocs are encountered during check_relocs.
4028 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4029 indicate the corresponding GOT entry type is not needed.
4030 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4031 a TPREL one. We use a separate flag rather than setting TPREL
4032 just for convenience in distinguishing the two cases. */
4033 #define TLS_GD 1 /* GD reloc. */
4034 #define TLS_LD 2 /* LD reloc. */
4035 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4036 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4037 #define TLS_TLS 16 /* Any TLS reloc. */
4038 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4039 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4040 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4041 unsigned char tls_mask;
4042 };
4043
4044 /* ppc64 ELF linker hash table. */
4045
4046 struct ppc_link_hash_table
4047 {
4048 struct elf_link_hash_table elf;
4049
4050 /* The stub hash table. */
4051 struct bfd_hash_table stub_hash_table;
4052
4053 /* Another hash table for plt_branch stubs. */
4054 struct bfd_hash_table branch_hash_table;
4055
4056 /* Hash table for function prologue tocsave. */
4057 htab_t tocsave_htab;
4058
4059 /* Various options and other info passed from the linker. */
4060 struct ppc64_elf_params *params;
4061
4062 /* The size of sec_info below. */
4063 unsigned int sec_info_arr_size;
4064
4065 /* Per-section array of extra section info. Done this way rather
4066 than as part of ppc64_elf_section_data so we have the info for
4067 non-ppc64 sections. */
4068 struct
4069 {
4070 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4071 bfd_vma toc_off;
4072
4073 union
4074 {
4075 /* The section group that this section belongs to. */
4076 struct map_stub *group;
4077 /* A temp section list pointer. */
4078 asection *list;
4079 } u;
4080 } *sec_info;
4081
4082 /* Linked list of groups. */
4083 struct map_stub *group;
4084
4085 /* Temp used when calculating TOC pointers. */
4086 bfd_vma toc_curr;
4087 bfd *toc_bfd;
4088 asection *toc_first_sec;
4089
4090 /* Used when adding symbols. */
4091 struct ppc_link_hash_entry *dot_syms;
4092
4093 /* Shortcuts to get to dynamic linker sections. */
4094 asection *glink;
4095 asection *sfpr;
4096 asection *brlt;
4097 asection *relbrlt;
4098 asection *glink_eh_frame;
4099
4100 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4101 struct ppc_link_hash_entry *tls_get_addr;
4102 struct ppc_link_hash_entry *tls_get_addr_fd;
4103
4104 /* The size of reliplt used by got entry relocs. */
4105 bfd_size_type got_reli_size;
4106
4107 /* Statistics. */
4108 unsigned long stub_count[ppc_stub_global_entry];
4109
4110 /* Number of stubs against global syms. */
4111 unsigned long stub_globals;
4112
4113 /* Set if we're linking code with function descriptors. */
4114 unsigned int opd_abi:1;
4115
4116 /* Support for multiple toc sections. */
4117 unsigned int do_multi_toc:1;
4118 unsigned int multi_toc_needed:1;
4119 unsigned int second_toc_pass:1;
4120 unsigned int do_toc_opt:1;
4121
4122 /* Set if tls optimization is enabled. */
4123 unsigned int do_tls_opt:1;
4124
4125 /* Set on error. */
4126 unsigned int stub_error:1;
4127
4128 /* Whether func_desc_adjust needs to be run over symbols. */
4129 unsigned int need_func_desc_adj:1;
4130
4131 /* Whether there exist local gnu indirect function resolvers,
4132 referenced by dynamic relocations. */
4133 unsigned int local_ifunc_resolver:1;
4134 unsigned int maybe_local_ifunc_resolver:1;
4135
4136 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4137 unsigned int has_plt_localentry0:1;
4138
4139 /* Incremented every time we size stubs. */
4140 unsigned int stub_iteration;
4141
4142 /* Small local sym cache. */
4143 struct sym_cache sym_cache;
4144 };
4145
4146 /* Rename some of the generic section flags to better document how they
4147 are used here. */
4148
4149 /* Nonzero if this section has TLS related relocations. */
4150 #define has_tls_reloc sec_flg0
4151
4152 /* Nonzero if this section has a call to __tls_get_addr. */
4153 #define has_tls_get_addr_call sec_flg1
4154
4155 /* Nonzero if this section has any toc or got relocs. */
4156 #define has_toc_reloc sec_flg2
4157
4158 /* Nonzero if this section has a call to another section that uses
4159 the toc or got. */
4160 #define makes_toc_func_call sec_flg3
4161
4162 /* Recursion protection when determining above flag. */
4163 #define call_check_in_progress sec_flg4
4164 #define call_check_done sec_flg5
4165
4166 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4167
4168 #define ppc_hash_table(p) \
4169 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4170 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4171
4172 #define ppc_stub_hash_lookup(table, string, create, copy) \
4173 ((struct ppc_stub_hash_entry *) \
4174 bfd_hash_lookup ((table), (string), (create), (copy)))
4175
4176 #define ppc_branch_hash_lookup(table, string, create, copy) \
4177 ((struct ppc_branch_hash_entry *) \
4178 bfd_hash_lookup ((table), (string), (create), (copy)))
4179
4180 /* Create an entry in the stub hash table. */
4181
4182 static struct bfd_hash_entry *
4183 stub_hash_newfunc (struct bfd_hash_entry *entry,
4184 struct bfd_hash_table *table,
4185 const char *string)
4186 {
4187 /* Allocate the structure if it has not already been allocated by a
4188 subclass. */
4189 if (entry == NULL)
4190 {
4191 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4192 if (entry == NULL)
4193 return entry;
4194 }
4195
4196 /* Call the allocation method of the superclass. */
4197 entry = bfd_hash_newfunc (entry, table, string);
4198 if (entry != NULL)
4199 {
4200 struct ppc_stub_hash_entry *eh;
4201
4202 /* Initialize the local fields. */
4203 eh = (struct ppc_stub_hash_entry *) entry;
4204 eh->stub_type = ppc_stub_none;
4205 eh->group = NULL;
4206 eh->stub_offset = 0;
4207 eh->target_value = 0;
4208 eh->target_section = NULL;
4209 eh->h = NULL;
4210 eh->plt_ent = NULL;
4211 eh->other = 0;
4212 }
4213
4214 return entry;
4215 }
4216
4217 /* Create an entry in the branch hash table. */
4218
4219 static struct bfd_hash_entry *
4220 branch_hash_newfunc (struct bfd_hash_entry *entry,
4221 struct bfd_hash_table *table,
4222 const char *string)
4223 {
4224 /* Allocate the structure if it has not already been allocated by a
4225 subclass. */
4226 if (entry == NULL)
4227 {
4228 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4229 if (entry == NULL)
4230 return entry;
4231 }
4232
4233 /* Call the allocation method of the superclass. */
4234 entry = bfd_hash_newfunc (entry, table, string);
4235 if (entry != NULL)
4236 {
4237 struct ppc_branch_hash_entry *eh;
4238
4239 /* Initialize the local fields. */
4240 eh = (struct ppc_branch_hash_entry *) entry;
4241 eh->offset = 0;
4242 eh->iter = 0;
4243 }
4244
4245 return entry;
4246 }
4247
4248 /* Create an entry in a ppc64 ELF linker hash table. */
4249
4250 static struct bfd_hash_entry *
4251 link_hash_newfunc (struct bfd_hash_entry *entry,
4252 struct bfd_hash_table *table,
4253 const char *string)
4254 {
4255 /* Allocate the structure if it has not already been allocated by a
4256 subclass. */
4257 if (entry == NULL)
4258 {
4259 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4260 if (entry == NULL)
4261 return entry;
4262 }
4263
4264 /* Call the allocation method of the superclass. */
4265 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4266 if (entry != NULL)
4267 {
4268 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4269
4270 memset (&eh->u.stub_cache, 0,
4271 (sizeof (struct ppc_link_hash_entry)
4272 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4273
4274 /* When making function calls, old ABI code references function entry
4275 points (dot symbols), while new ABI code references the function
4276 descriptor symbol. We need to make any combination of reference and
4277 definition work together, without breaking archive linking.
4278
4279 For a defined function "foo" and an undefined call to "bar":
4280 An old object defines "foo" and ".foo", references ".bar" (possibly
4281 "bar" too).
4282 A new object defines "foo" and references "bar".
4283
4284 A new object thus has no problem with its undefined symbols being
4285 satisfied by definitions in an old object. On the other hand, the
4286 old object won't have ".bar" satisfied by a new object.
4287
4288 Keep a list of newly added dot-symbols. */
4289
4290 if (string[0] == '.')
4291 {
4292 struct ppc_link_hash_table *htab;
4293
4294 htab = (struct ppc_link_hash_table *) table;
4295 eh->u.next_dot_sym = htab->dot_syms;
4296 htab->dot_syms = eh;
4297 }
4298 }
4299
4300 return entry;
4301 }
4302
4303 struct tocsave_entry {
4304 asection *sec;
4305 bfd_vma offset;
4306 };
4307
4308 static hashval_t
4309 tocsave_htab_hash (const void *p)
4310 {
4311 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4312 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4313 }
4314
4315 static int
4316 tocsave_htab_eq (const void *p1, const void *p2)
4317 {
4318 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4319 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4320 return e1->sec == e2->sec && e1->offset == e2->offset;
4321 }
4322
4323 /* Destroy a ppc64 ELF linker hash table. */
4324
4325 static void
4326 ppc64_elf_link_hash_table_free (bfd *obfd)
4327 {
4328 struct ppc_link_hash_table *htab;
4329
4330 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4331 if (htab->tocsave_htab)
4332 htab_delete (htab->tocsave_htab);
4333 bfd_hash_table_free (&htab->branch_hash_table);
4334 bfd_hash_table_free (&htab->stub_hash_table);
4335 _bfd_elf_link_hash_table_free (obfd);
4336 }
4337
4338 /* Create a ppc64 ELF linker hash table. */
4339
4340 static struct bfd_link_hash_table *
4341 ppc64_elf_link_hash_table_create (bfd *abfd)
4342 {
4343 struct ppc_link_hash_table *htab;
4344 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4345
4346 htab = bfd_zmalloc (amt);
4347 if (htab == NULL)
4348 return NULL;
4349
4350 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4351 sizeof (struct ppc_link_hash_entry),
4352 PPC64_ELF_DATA))
4353 {
4354 free (htab);
4355 return NULL;
4356 }
4357
4358 /* Init the stub hash table too. */
4359 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4360 sizeof (struct ppc_stub_hash_entry)))
4361 {
4362 _bfd_elf_link_hash_table_free (abfd);
4363 return NULL;
4364 }
4365
4366 /* And the branch hash table. */
4367 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4368 sizeof (struct ppc_branch_hash_entry)))
4369 {
4370 bfd_hash_table_free (&htab->stub_hash_table);
4371 _bfd_elf_link_hash_table_free (abfd);
4372 return NULL;
4373 }
4374
4375 htab->tocsave_htab = htab_try_create (1024,
4376 tocsave_htab_hash,
4377 tocsave_htab_eq,
4378 NULL);
4379 if (htab->tocsave_htab == NULL)
4380 {
4381 ppc64_elf_link_hash_table_free (abfd);
4382 return NULL;
4383 }
4384 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4385
4386 /* Initializing two fields of the union is just cosmetic. We really
4387 only care about glist, but when compiled on a 32-bit host the
4388 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4389 debugger inspection of these fields look nicer. */
4390 htab->elf.init_got_refcount.refcount = 0;
4391 htab->elf.init_got_refcount.glist = NULL;
4392 htab->elf.init_plt_refcount.refcount = 0;
4393 htab->elf.init_plt_refcount.glist = NULL;
4394 htab->elf.init_got_offset.offset = 0;
4395 htab->elf.init_got_offset.glist = NULL;
4396 htab->elf.init_plt_offset.offset = 0;
4397 htab->elf.init_plt_offset.glist = NULL;
4398
4399 return &htab->elf.root;
4400 }
4401
4402 /* Create sections for linker generated code. */
4403
4404 static bfd_boolean
4405 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4406 {
4407 struct ppc_link_hash_table *htab;
4408 flagword flags;
4409
4410 htab = ppc_hash_table (info);
4411
4412 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4413 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4414 if (htab->params->save_restore_funcs)
4415 {
4416 /* Create .sfpr for code to save and restore fp regs. */
4417 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4418 flags);
4419 if (htab->sfpr == NULL
4420 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4421 return FALSE;
4422 }
4423
4424 if (bfd_link_relocatable (info))
4425 return TRUE;
4426
4427 /* Create .glink for lazy dynamic linking support. */
4428 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4429 flags);
4430 if (htab->glink == NULL
4431 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4432 return FALSE;
4433
4434 if (!info->no_ld_generated_unwind_info)
4435 {
4436 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4437 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4438 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4439 ".eh_frame",
4440 flags);
4441 if (htab->glink_eh_frame == NULL
4442 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4443 return FALSE;
4444 }
4445
4446 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4447 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4448 if (htab->elf.iplt == NULL
4449 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4450 return FALSE;
4451
4452 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4453 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4454 htab->elf.irelplt
4455 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4456 if (htab->elf.irelplt == NULL
4457 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4458 return FALSE;
4459
4460 /* Create branch lookup table for plt_branch stubs. */
4461 flags = (SEC_ALLOC | SEC_LOAD
4462 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4463 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4464 flags);
4465 if (htab->brlt == NULL
4466 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4467 return FALSE;
4468
4469 if (!bfd_link_pic (info))
4470 return TRUE;
4471
4472 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4473 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4474 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4475 ".rela.branch_lt",
4476 flags);
4477 if (htab->relbrlt == NULL
4478 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4479 return FALSE;
4480
4481 return TRUE;
4482 }
4483
4484 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4485
4486 bfd_boolean
4487 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4488 struct ppc64_elf_params *params)
4489 {
4490 struct ppc_link_hash_table *htab;
4491
4492 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4493
4494 /* Always hook our dynamic sections into the first bfd, which is the
4495 linker created stub bfd. This ensures that the GOT header is at
4496 the start of the output TOC section. */
4497 htab = ppc_hash_table (info);
4498 htab->elf.dynobj = params->stub_bfd;
4499 htab->params = params;
4500
4501 return create_linkage_sections (htab->elf.dynobj, info);
4502 }
4503
4504 /* Build a name for an entry in the stub hash table. */
4505
4506 static char *
4507 ppc_stub_name (const asection *input_section,
4508 const asection *sym_sec,
4509 const struct ppc_link_hash_entry *h,
4510 const Elf_Internal_Rela *rel)
4511 {
4512 char *stub_name;
4513 ssize_t len;
4514
4515 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4516 offsets from a sym as a branch target? In fact, we could
4517 probably assume the addend is always zero. */
4518 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4519
4520 if (h)
4521 {
4522 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4523 stub_name = bfd_malloc (len);
4524 if (stub_name == NULL)
4525 return stub_name;
4526
4527 len = sprintf (stub_name, "%08x.%s+%x",
4528 input_section->id & 0xffffffff,
4529 h->elf.root.root.string,
4530 (int) rel->r_addend & 0xffffffff);
4531 }
4532 else
4533 {
4534 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4535 stub_name = bfd_malloc (len);
4536 if (stub_name == NULL)
4537 return stub_name;
4538
4539 len = sprintf (stub_name, "%08x.%x:%x+%x",
4540 input_section->id & 0xffffffff,
4541 sym_sec->id & 0xffffffff,
4542 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4543 (int) rel->r_addend & 0xffffffff);
4544 }
4545 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4546 stub_name[len - 2] = 0;
4547 return stub_name;
4548 }
4549
4550 /* Look up an entry in the stub hash. Stub entries are cached because
4551 creating the stub name takes a bit of time. */
4552
4553 static struct ppc_stub_hash_entry *
4554 ppc_get_stub_entry (const asection *input_section,
4555 const asection *sym_sec,
4556 struct ppc_link_hash_entry *h,
4557 const Elf_Internal_Rela *rel,
4558 struct ppc_link_hash_table *htab)
4559 {
4560 struct ppc_stub_hash_entry *stub_entry;
4561 struct map_stub *group;
4562
4563 /* If this input section is part of a group of sections sharing one
4564 stub section, then use the id of the first section in the group.
4565 Stub names need to include a section id, as there may well be
4566 more than one stub used to reach say, printf, and we need to
4567 distinguish between them. */
4568 group = htab->sec_info[input_section->id].u.group;
4569 if (group == NULL)
4570 return NULL;
4571
4572 if (h != NULL && h->u.stub_cache != NULL
4573 && h->u.stub_cache->h == h
4574 && h->u.stub_cache->group == group)
4575 {
4576 stub_entry = h->u.stub_cache;
4577 }
4578 else
4579 {
4580 char *stub_name;
4581
4582 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4583 if (stub_name == NULL)
4584 return NULL;
4585
4586 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4587 stub_name, FALSE, FALSE);
4588 if (h != NULL)
4589 h->u.stub_cache = stub_entry;
4590
4591 free (stub_name);
4592 }
4593
4594 return stub_entry;
4595 }
4596
4597 /* Add a new stub entry to the stub hash. Not all fields of the new
4598 stub entry are initialised. */
4599
4600 static struct ppc_stub_hash_entry *
4601 ppc_add_stub (const char *stub_name,
4602 asection *section,
4603 struct bfd_link_info *info)
4604 {
4605 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4606 struct map_stub *group;
4607 asection *link_sec;
4608 asection *stub_sec;
4609 struct ppc_stub_hash_entry *stub_entry;
4610
4611 group = htab->sec_info[section->id].u.group;
4612 link_sec = group->link_sec;
4613 stub_sec = group->stub_sec;
4614 if (stub_sec == NULL)
4615 {
4616 size_t namelen;
4617 bfd_size_type len;
4618 char *s_name;
4619
4620 namelen = strlen (link_sec->name);
4621 len = namelen + sizeof (STUB_SUFFIX);
4622 s_name = bfd_alloc (htab->params->stub_bfd, len);
4623 if (s_name == NULL)
4624 return NULL;
4625
4626 memcpy (s_name, link_sec->name, namelen);
4627 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4628 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4629 if (stub_sec == NULL)
4630 return NULL;
4631 group->stub_sec = stub_sec;
4632 }
4633
4634 /* Enter this entry into the linker stub hash table. */
4635 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4636 TRUE, FALSE);
4637 if (stub_entry == NULL)
4638 {
4639 /* xgettext:c-format */
4640 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4641 section->owner, stub_name);
4642 return NULL;
4643 }
4644
4645 stub_entry->group = group;
4646 stub_entry->stub_offset = 0;
4647 return stub_entry;
4648 }
4649
4650 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4651 not already done. */
4652
4653 static bfd_boolean
4654 create_got_section (bfd *abfd, struct bfd_link_info *info)
4655 {
4656 asection *got, *relgot;
4657 flagword flags;
4658 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4659
4660 if (!is_ppc64_elf (abfd))
4661 return FALSE;
4662 if (htab == NULL)
4663 return FALSE;
4664
4665 if (!htab->elf.sgot
4666 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4667 return FALSE;
4668
4669 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4670 | SEC_LINKER_CREATED);
4671
4672 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4673 if (!got
4674 || !bfd_set_section_alignment (abfd, got, 3))
4675 return FALSE;
4676
4677 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4678 flags | SEC_READONLY);
4679 if (!relgot
4680 || ! bfd_set_section_alignment (abfd, relgot, 3))
4681 return FALSE;
4682
4683 ppc64_elf_tdata (abfd)->got = got;
4684 ppc64_elf_tdata (abfd)->relgot = relgot;
4685 return TRUE;
4686 }
4687
4688 /* Follow indirect and warning symbol links. */
4689
4690 static inline struct bfd_link_hash_entry *
4691 follow_link (struct bfd_link_hash_entry *h)
4692 {
4693 while (h->type == bfd_link_hash_indirect
4694 || h->type == bfd_link_hash_warning)
4695 h = h->u.i.link;
4696 return h;
4697 }
4698
4699 static inline struct elf_link_hash_entry *
4700 elf_follow_link (struct elf_link_hash_entry *h)
4701 {
4702 return (struct elf_link_hash_entry *) follow_link (&h->root);
4703 }
4704
4705 static inline struct ppc_link_hash_entry *
4706 ppc_follow_link (struct ppc_link_hash_entry *h)
4707 {
4708 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4709 }
4710
4711 /* Merge PLT info on FROM with that on TO. */
4712
4713 static void
4714 move_plt_plist (struct ppc_link_hash_entry *from,
4715 struct ppc_link_hash_entry *to)
4716 {
4717 if (from->elf.plt.plist != NULL)
4718 {
4719 if (to->elf.plt.plist != NULL)
4720 {
4721 struct plt_entry **entp;
4722 struct plt_entry *ent;
4723
4724 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4725 {
4726 struct plt_entry *dent;
4727
4728 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4729 if (dent->addend == ent->addend)
4730 {
4731 dent->plt.refcount += ent->plt.refcount;
4732 *entp = ent->next;
4733 break;
4734 }
4735 if (dent == NULL)
4736 entp = &ent->next;
4737 }
4738 *entp = to->elf.plt.plist;
4739 }
4740
4741 to->elf.plt.plist = from->elf.plt.plist;
4742 from->elf.plt.plist = NULL;
4743 }
4744 }
4745
4746 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4747
4748 static void
4749 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4750 struct elf_link_hash_entry *dir,
4751 struct elf_link_hash_entry *ind)
4752 {
4753 struct ppc_link_hash_entry *edir, *eind;
4754
4755 edir = (struct ppc_link_hash_entry *) dir;
4756 eind = (struct ppc_link_hash_entry *) ind;
4757
4758 edir->is_func |= eind->is_func;
4759 edir->is_func_descriptor |= eind->is_func_descriptor;
4760 edir->tls_mask |= eind->tls_mask;
4761 if (eind->oh != NULL)
4762 edir->oh = ppc_follow_link (eind->oh);
4763
4764 /* If called to transfer flags for a weakdef during processing
4765 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4766 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4767 if (!(ELIMINATE_COPY_RELOCS
4768 && eind->elf.root.type != bfd_link_hash_indirect
4769 && edir->elf.dynamic_adjusted))
4770 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4771
4772 if (edir->elf.versioned != versioned_hidden)
4773 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4774 edir->elf.ref_regular |= eind->elf.ref_regular;
4775 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4776 edir->elf.needs_plt |= eind->elf.needs_plt;
4777 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4778
4779 /* If we were called to copy over info for a weak sym, don't copy
4780 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4781 in order to simplify readonly_dynrelocs and save a field in the
4782 symbol hash entry, but that means dyn_relocs can't be used in any
4783 tests about a specific symbol, or affect other symbol flags which
4784 are then tested. */
4785 if (eind->elf.root.type != bfd_link_hash_indirect)
4786 return;
4787
4788 /* Copy over any dynamic relocs we may have on the indirect sym. */
4789 if (eind->dyn_relocs != NULL)
4790 {
4791 if (edir->dyn_relocs != NULL)
4792 {
4793 struct elf_dyn_relocs **pp;
4794 struct elf_dyn_relocs *p;
4795
4796 /* Add reloc counts against the indirect sym to the direct sym
4797 list. Merge any entries against the same section. */
4798 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4799 {
4800 struct elf_dyn_relocs *q;
4801
4802 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4803 if (q->sec == p->sec)
4804 {
4805 q->pc_count += p->pc_count;
4806 q->count += p->count;
4807 *pp = p->next;
4808 break;
4809 }
4810 if (q == NULL)
4811 pp = &p->next;
4812 }
4813 *pp = edir->dyn_relocs;
4814 }
4815
4816 edir->dyn_relocs = eind->dyn_relocs;
4817 eind->dyn_relocs = NULL;
4818 }
4819
4820 /* Copy over got entries that we may have already seen to the
4821 symbol which just became indirect. */
4822 if (eind->elf.got.glist != NULL)
4823 {
4824 if (edir->elf.got.glist != NULL)
4825 {
4826 struct got_entry **entp;
4827 struct got_entry *ent;
4828
4829 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4830 {
4831 struct got_entry *dent;
4832
4833 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4834 if (dent->addend == ent->addend
4835 && dent->owner == ent->owner
4836 && dent->tls_type == ent->tls_type)
4837 {
4838 dent->got.refcount += ent->got.refcount;
4839 *entp = ent->next;
4840 break;
4841 }
4842 if (dent == NULL)
4843 entp = &ent->next;
4844 }
4845 *entp = edir->elf.got.glist;
4846 }
4847
4848 edir->elf.got.glist = eind->elf.got.glist;
4849 eind->elf.got.glist = NULL;
4850 }
4851
4852 /* And plt entries. */
4853 move_plt_plist (eind, edir);
4854
4855 if (eind->elf.dynindx != -1)
4856 {
4857 if (edir->elf.dynindx != -1)
4858 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4859 edir->elf.dynstr_index);
4860 edir->elf.dynindx = eind->elf.dynindx;
4861 edir->elf.dynstr_index = eind->elf.dynstr_index;
4862 eind->elf.dynindx = -1;
4863 eind->elf.dynstr_index = 0;
4864 }
4865 }
4866
4867 /* Find the function descriptor hash entry from the given function code
4868 hash entry FH. Link the entries via their OH fields. */
4869
4870 static struct ppc_link_hash_entry *
4871 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4872 {
4873 struct ppc_link_hash_entry *fdh = fh->oh;
4874
4875 if (fdh == NULL)
4876 {
4877 const char *fd_name = fh->elf.root.root.string + 1;
4878
4879 fdh = (struct ppc_link_hash_entry *)
4880 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4881 if (fdh == NULL)
4882 return fdh;
4883
4884 fdh->is_func_descriptor = 1;
4885 fdh->oh = fh;
4886 fh->is_func = 1;
4887 fh->oh = fdh;
4888 }
4889
4890 fdh = ppc_follow_link (fdh);
4891 fdh->is_func_descriptor = 1;
4892 fdh->oh = fh;
4893 return fdh;
4894 }
4895
4896 /* Make a fake function descriptor sym for the undefined code sym FH. */
4897
4898 static struct ppc_link_hash_entry *
4899 make_fdh (struct bfd_link_info *info,
4900 struct ppc_link_hash_entry *fh)
4901 {
4902 bfd *abfd = fh->elf.root.u.undef.abfd;
4903 struct bfd_link_hash_entry *bh = NULL;
4904 struct ppc_link_hash_entry *fdh;
4905 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4906 ? BSF_WEAK
4907 : BSF_GLOBAL);
4908
4909 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4910 fh->elf.root.root.string + 1,
4911 flags, bfd_und_section_ptr, 0,
4912 NULL, FALSE, FALSE, &bh))
4913 return NULL;
4914
4915 fdh = (struct ppc_link_hash_entry *) bh;
4916 fdh->elf.non_elf = 0;
4917 fdh->fake = 1;
4918 fdh->is_func_descriptor = 1;
4919 fdh->oh = fh;
4920 fh->is_func = 1;
4921 fh->oh = fdh;
4922 return fdh;
4923 }
4924
4925 /* Fix function descriptor symbols defined in .opd sections to be
4926 function type. */
4927
4928 static bfd_boolean
4929 ppc64_elf_add_symbol_hook (bfd *ibfd,
4930 struct bfd_link_info *info,
4931 Elf_Internal_Sym *isym,
4932 const char **name,
4933 flagword *flags ATTRIBUTE_UNUSED,
4934 asection **sec,
4935 bfd_vma *value)
4936 {
4937 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4938 && (ibfd->flags & DYNAMIC) == 0
4939 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4940 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4941
4942 if (*sec != NULL
4943 && strcmp ((*sec)->name, ".opd") == 0)
4944 {
4945 asection *code_sec;
4946
4947 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4948 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4949 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4950
4951 /* If the symbol is a function defined in .opd, and the function
4952 code is in a discarded group, let it appear to be undefined. */
4953 if (!bfd_link_relocatable (info)
4954 && (*sec)->reloc_count != 0
4955 && opd_entry_value (*sec, *value, &code_sec, NULL,
4956 FALSE) != (bfd_vma) -1
4957 && discarded_section (code_sec))
4958 {
4959 *sec = bfd_und_section_ptr;
4960 isym->st_shndx = SHN_UNDEF;
4961 }
4962 }
4963 else if (*sec != NULL
4964 && strcmp ((*sec)->name, ".toc") == 0
4965 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4966 {
4967 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4968 if (htab != NULL)
4969 htab->params->object_in_toc = 1;
4970 }
4971
4972 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4973 {
4974 if (abiversion (ibfd) == 0)
4975 set_abiversion (ibfd, 2);
4976 else if (abiversion (ibfd) == 1)
4977 {
4978 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4979 " for ABI version 1\n"), name);
4980 bfd_set_error (bfd_error_bad_value);
4981 return FALSE;
4982 }
4983 }
4984
4985 return TRUE;
4986 }
4987
4988 /* Merge non-visibility st_other attributes: local entry point. */
4989
4990 static void
4991 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4992 const Elf_Internal_Sym *isym,
4993 bfd_boolean definition,
4994 bfd_boolean dynamic)
4995 {
4996 if (definition && (!dynamic || !h->def_regular))
4997 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4998 | ELF_ST_VISIBILITY (h->other));
4999 }
5000
5001 /* Hook called on merging a symbol. We use this to clear "fake" since
5002 we now have a real symbol. */
5003
5004 static bfd_boolean
5005 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5006 const Elf_Internal_Sym *isym,
5007 asection **psec ATTRIBUTE_UNUSED,
5008 bfd_boolean newdef ATTRIBUTE_UNUSED,
5009 bfd_boolean olddef ATTRIBUTE_UNUSED,
5010 bfd *oldbfd ATTRIBUTE_UNUSED,
5011 const asection *oldsec ATTRIBUTE_UNUSED)
5012 {
5013 ((struct ppc_link_hash_entry *) h)->fake = 0;
5014 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5015 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5016 return TRUE;
5017 }
5018
5019 /* This function makes an old ABI object reference to ".bar" cause the
5020 inclusion of a new ABI object archive that defines "bar".
5021 NAME is a symbol defined in an archive. Return a symbol in the hash
5022 table that might be satisfied by the archive symbols. */
5023
5024 static struct elf_link_hash_entry *
5025 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5026 struct bfd_link_info *info,
5027 const char *name)
5028 {
5029 struct elf_link_hash_entry *h;
5030 char *dot_name;
5031 size_t len;
5032
5033 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5034 if (h != NULL
5035 /* Don't return this sym if it is a fake function descriptor
5036 created by add_symbol_adjust. */
5037 && !((struct ppc_link_hash_entry *) h)->fake)
5038 return h;
5039
5040 if (name[0] == '.')
5041 return h;
5042
5043 len = strlen (name);
5044 dot_name = bfd_alloc (abfd, len + 2);
5045 if (dot_name == NULL)
5046 return (struct elf_link_hash_entry *) 0 - 1;
5047 dot_name[0] = '.';
5048 memcpy (dot_name + 1, name, len + 1);
5049 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5050 bfd_release (abfd, dot_name);
5051 return h;
5052 }
5053
5054 /* This function satisfies all old ABI object references to ".bar" if a
5055 new ABI object defines "bar". Well, at least, undefined dot symbols
5056 are made weak. This stops later archive searches from including an
5057 object if we already have a function descriptor definition. It also
5058 prevents the linker complaining about undefined symbols.
5059 We also check and correct mismatched symbol visibility here. The
5060 most restrictive visibility of the function descriptor and the
5061 function entry symbol is used. */
5062
5063 static bfd_boolean
5064 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5065 {
5066 struct ppc_link_hash_table *htab;
5067 struct ppc_link_hash_entry *fdh;
5068
5069 if (eh->elf.root.type == bfd_link_hash_warning)
5070 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5071
5072 if (eh->elf.root.type == bfd_link_hash_indirect)
5073 return TRUE;
5074
5075 if (eh->elf.root.root.string[0] != '.')
5076 abort ();
5077
5078 htab = ppc_hash_table (info);
5079 if (htab == NULL)
5080 return FALSE;
5081
5082 fdh = lookup_fdh (eh, htab);
5083 if (fdh == NULL
5084 && !bfd_link_relocatable (info)
5085 && (eh->elf.root.type == bfd_link_hash_undefined
5086 || eh->elf.root.type == bfd_link_hash_undefweak)
5087 && eh->elf.ref_regular)
5088 {
5089 /* Make an undefined function descriptor sym, in order to
5090 pull in an --as-needed shared lib. Archives are handled
5091 elsewhere. */
5092 fdh = make_fdh (info, eh);
5093 if (fdh == NULL)
5094 return FALSE;
5095 }
5096
5097 if (fdh != NULL)
5098 {
5099 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5100 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5101
5102 /* Make both descriptor and entry symbol have the most
5103 constraining visibility of either symbol. */
5104 if (entry_vis < descr_vis)
5105 fdh->elf.other += entry_vis - descr_vis;
5106 else if (entry_vis > descr_vis)
5107 eh->elf.other += descr_vis - entry_vis;
5108
5109 /* Propagate reference flags from entry symbol to function
5110 descriptor symbol. */
5111 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5112 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5113 fdh->elf.ref_regular |= eh->elf.ref_regular;
5114 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5115
5116 if (!fdh->elf.forced_local
5117 && fdh->elf.dynindx == -1
5118 && fdh->elf.versioned != versioned_hidden
5119 && (bfd_link_dll (info)
5120 || fdh->elf.def_dynamic
5121 || fdh->elf.ref_dynamic)
5122 && (eh->elf.ref_regular
5123 || eh->elf.def_regular))
5124 {
5125 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5126 return FALSE;
5127 }
5128 }
5129
5130 return TRUE;
5131 }
5132
5133 /* Set up opd section info and abiversion for IBFD, and process list
5134 of dot-symbols we made in link_hash_newfunc. */
5135
5136 static bfd_boolean
5137 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5138 {
5139 struct ppc_link_hash_table *htab;
5140 struct ppc_link_hash_entry **p, *eh;
5141 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5142
5143 if (opd != NULL && opd->size != 0)
5144 {
5145 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5146 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5147
5148 if (abiversion (ibfd) == 0)
5149 set_abiversion (ibfd, 1);
5150 else if (abiversion (ibfd) >= 2)
5151 {
5152 /* xgettext:c-format */
5153 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5154 " version %d\n"),
5155 ibfd, abiversion (ibfd));
5156 bfd_set_error (bfd_error_bad_value);
5157 return FALSE;
5158 }
5159 }
5160
5161 if (is_ppc64_elf (info->output_bfd))
5162 {
5163 /* For input files without an explicit abiversion in e_flags
5164 we should have flagged any with symbol st_other bits set
5165 as ELFv1 and above flagged those with .opd as ELFv2.
5166 Set the output abiversion if not yet set, and for any input
5167 still ambiguous, take its abiversion from the output.
5168 Differences in ABI are reported later. */
5169 if (abiversion (info->output_bfd) == 0)
5170 set_abiversion (info->output_bfd, abiversion (ibfd));
5171 else if (abiversion (ibfd) == 0)
5172 set_abiversion (ibfd, abiversion (info->output_bfd));
5173 }
5174
5175 htab = ppc_hash_table (info);
5176 if (htab == NULL)
5177 return TRUE;
5178
5179 if (opd != NULL && opd->size != 0
5180 && (ibfd->flags & DYNAMIC) == 0
5181 && (opd->flags & SEC_RELOC) != 0
5182 && opd->reloc_count != 0
5183 && !bfd_is_abs_section (opd->output_section)
5184 && info->gc_sections)
5185 {
5186 /* Garbage collection needs some extra help with .opd sections.
5187 We don't want to necessarily keep everything referenced by
5188 relocs in .opd, as that would keep all functions. Instead,
5189 if we reference an .opd symbol (a function descriptor), we
5190 want to keep the function code symbol's section. This is
5191 easy for global symbols, but for local syms we need to keep
5192 information about the associated function section. */
5193 bfd_size_type amt;
5194 asection **opd_sym_map;
5195 Elf_Internal_Shdr *symtab_hdr;
5196 Elf_Internal_Rela *relocs, *rel_end, *rel;
5197
5198 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5199 opd_sym_map = bfd_zalloc (ibfd, amt);
5200 if (opd_sym_map == NULL)
5201 return FALSE;
5202 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5203 relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL,
5204 info->keep_memory);
5205 if (relocs == NULL)
5206 return FALSE;
5207 symtab_hdr = &elf_symtab_hdr (ibfd);
5208 rel_end = relocs + opd->reloc_count - 1;
5209 for (rel = relocs; rel < rel_end; rel++)
5210 {
5211 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
5212 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
5213
5214 if (r_type == R_PPC64_ADDR64
5215 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC
5216 && r_symndx < symtab_hdr->sh_info)
5217 {
5218 Elf_Internal_Sym *isym;
5219 asection *s;
5220
5221 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx);
5222 if (isym == NULL)
5223 {
5224 if (elf_section_data (opd)->relocs != relocs)
5225 free (relocs);
5226 return FALSE;
5227 }
5228
5229 s = bfd_section_from_elf_index (ibfd, isym->st_shndx);
5230 if (s != NULL && s != opd)
5231 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5232 }
5233 }
5234 if (elf_section_data (opd)->relocs != relocs)
5235 free (relocs);
5236 }
5237
5238 p = &htab->dot_syms;
5239 while ((eh = *p) != NULL)
5240 {
5241 *p = NULL;
5242 if (&eh->elf == htab->elf.hgot)
5243 ;
5244 else if (htab->elf.hgot == NULL
5245 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5246 htab->elf.hgot = &eh->elf;
5247 else if (abiversion (ibfd) <= 1)
5248 {
5249 htab->need_func_desc_adj = 1;
5250 if (!add_symbol_adjust (eh, info))
5251 return FALSE;
5252 }
5253 p = &eh->u.next_dot_sym;
5254 }
5255 return TRUE;
5256 }
5257
5258 /* Undo hash table changes when an --as-needed input file is determined
5259 not to be needed. */
5260
5261 static bfd_boolean
5262 ppc64_elf_notice_as_needed (bfd *ibfd,
5263 struct bfd_link_info *info,
5264 enum notice_asneeded_action act)
5265 {
5266 if (act == notice_not_needed)
5267 {
5268 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5269
5270 if (htab == NULL)
5271 return FALSE;
5272
5273 htab->dot_syms = NULL;
5274 }
5275 return _bfd_elf_notice_as_needed (ibfd, info, act);
5276 }
5277
5278 /* If --just-symbols against a final linked binary, then assume we need
5279 toc adjusting stubs when calling functions defined there. */
5280
5281 static void
5282 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5283 {
5284 if ((sec->flags & SEC_CODE) != 0
5285 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5286 && is_ppc64_elf (sec->owner))
5287 {
5288 if (abiversion (sec->owner) >= 2
5289 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5290 sec->has_toc_reloc = 1;
5291 }
5292 _bfd_elf_link_just_syms (sec, info);
5293 }
5294
5295 static struct plt_entry **
5296 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5297 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5298 {
5299 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5300 struct plt_entry **local_plt;
5301 unsigned char *local_got_tls_masks;
5302
5303 if (local_got_ents == NULL)
5304 {
5305 bfd_size_type size = symtab_hdr->sh_info;
5306
5307 size *= (sizeof (*local_got_ents)
5308 + sizeof (*local_plt)
5309 + sizeof (*local_got_tls_masks));
5310 local_got_ents = bfd_zalloc (abfd, size);
5311 if (local_got_ents == NULL)
5312 return NULL;
5313 elf_local_got_ents (abfd) = local_got_ents;
5314 }
5315
5316 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5317 {
5318 struct got_entry *ent;
5319
5320 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5321 if (ent->addend == r_addend
5322 && ent->owner == abfd
5323 && ent->tls_type == tls_type)
5324 break;
5325 if (ent == NULL)
5326 {
5327 bfd_size_type amt = sizeof (*ent);
5328 ent = bfd_alloc (abfd, amt);
5329 if (ent == NULL)
5330 return FALSE;
5331 ent->next = local_got_ents[r_symndx];
5332 ent->addend = r_addend;
5333 ent->owner = abfd;
5334 ent->tls_type = tls_type;
5335 ent->is_indirect = FALSE;
5336 ent->got.refcount = 0;
5337 local_got_ents[r_symndx] = ent;
5338 }
5339 ent->got.refcount += 1;
5340 }
5341
5342 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5343 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5344 local_got_tls_masks[r_symndx] |= tls_type;
5345
5346 return local_plt + r_symndx;
5347 }
5348
5349 static bfd_boolean
5350 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5351 {
5352 struct plt_entry *ent;
5353
5354 for (ent = *plist; ent != NULL; ent = ent->next)
5355 if (ent->addend == addend)
5356 break;
5357 if (ent == NULL)
5358 {
5359 bfd_size_type amt = sizeof (*ent);
5360 ent = bfd_alloc (abfd, amt);
5361 if (ent == NULL)
5362 return FALSE;
5363 ent->next = *plist;
5364 ent->addend = addend;
5365 ent->plt.refcount = 0;
5366 *plist = ent;
5367 }
5368 ent->plt.refcount += 1;
5369 return TRUE;
5370 }
5371
5372 static bfd_boolean
5373 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5374 {
5375 return (r_type == R_PPC64_REL24
5376 || r_type == R_PPC64_REL14
5377 || r_type == R_PPC64_REL14_BRTAKEN
5378 || r_type == R_PPC64_REL14_BRNTAKEN
5379 || r_type == R_PPC64_ADDR24
5380 || r_type == R_PPC64_ADDR14
5381 || r_type == R_PPC64_ADDR14_BRTAKEN
5382 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5383 }
5384
5385 /* Look through the relocs for a section during the first phase, and
5386 calculate needed space in the global offset table, procedure
5387 linkage table, and dynamic reloc sections. */
5388
5389 static bfd_boolean
5390 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5391 asection *sec, const Elf_Internal_Rela *relocs)
5392 {
5393 struct ppc_link_hash_table *htab;
5394 Elf_Internal_Shdr *symtab_hdr;
5395 struct elf_link_hash_entry **sym_hashes;
5396 const Elf_Internal_Rela *rel;
5397 const Elf_Internal_Rela *rel_end;
5398 asection *sreloc;
5399 struct elf_link_hash_entry *tga, *dottga;
5400 bfd_boolean is_opd;
5401
5402 if (bfd_link_relocatable (info))
5403 return TRUE;
5404
5405 /* Don't do anything special with non-loaded, non-alloced sections.
5406 In particular, any relocs in such sections should not affect GOT
5407 and PLT reference counting (ie. we don't allow them to create GOT
5408 or PLT entries), there's no possibility or desire to optimize TLS
5409 relocs, and there's not much point in propagating relocs to shared
5410 libs that the dynamic linker won't relocate. */
5411 if ((sec->flags & SEC_ALLOC) == 0)
5412 return TRUE;
5413
5414 BFD_ASSERT (is_ppc64_elf (abfd));
5415
5416 htab = ppc_hash_table (info);
5417 if (htab == NULL)
5418 return FALSE;
5419
5420 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5421 FALSE, FALSE, TRUE);
5422 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5423 FALSE, FALSE, TRUE);
5424 symtab_hdr = &elf_symtab_hdr (abfd);
5425 sym_hashes = elf_sym_hashes (abfd);
5426 sreloc = NULL;
5427 is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd;
5428 rel_end = relocs + sec->reloc_count;
5429 for (rel = relocs; rel < rel_end; rel++)
5430 {
5431 unsigned long r_symndx;
5432 struct elf_link_hash_entry *h;
5433 enum elf_ppc64_reloc_type r_type;
5434 int tls_type;
5435 struct _ppc64_elf_section_data *ppc64_sec;
5436 struct plt_entry **ifunc, **plt_list;
5437
5438 r_symndx = ELF64_R_SYM (rel->r_info);
5439 if (r_symndx < symtab_hdr->sh_info)
5440 h = NULL;
5441 else
5442 {
5443 struct ppc_link_hash_entry *eh;
5444
5445 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5446 h = elf_follow_link (h);
5447 eh = (struct ppc_link_hash_entry *) h;
5448
5449 /* PR15323, ref flags aren't set for references in the same
5450 object. */
5451 h->root.non_ir_ref_regular = 1;
5452 if (eh->is_func && eh->oh != NULL)
5453 eh->oh->elf.root.non_ir_ref_regular = 1;
5454
5455 if (h == htab->elf.hgot)
5456 sec->has_toc_reloc = 1;
5457 }
5458
5459 tls_type = 0;
5460 ifunc = NULL;
5461 if (h != NULL)
5462 {
5463 if (h->type == STT_GNU_IFUNC)
5464 {
5465 h->needs_plt = 1;
5466 ifunc = &h->plt.plist;
5467 }
5468 }
5469 else
5470 {
5471 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5472 abfd, r_symndx);
5473 if (isym == NULL)
5474 return FALSE;
5475
5476 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5477 {
5478 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5479 rel->r_addend, PLT_IFUNC);
5480 if (ifunc == NULL)
5481 return FALSE;
5482 }
5483 }
5484
5485 r_type = ELF64_R_TYPE (rel->r_info);
5486 switch (r_type)
5487 {
5488 case R_PPC64_TLSGD:
5489 case R_PPC64_TLSLD:
5490 /* These special tls relocs tie a call to __tls_get_addr with
5491 its parameter symbol. */
5492 break;
5493
5494 case R_PPC64_GOT_TLSLD16:
5495 case R_PPC64_GOT_TLSLD16_LO:
5496 case R_PPC64_GOT_TLSLD16_HI:
5497 case R_PPC64_GOT_TLSLD16_HA:
5498 tls_type = TLS_TLS | TLS_LD;
5499 goto dogottls;
5500
5501 case R_PPC64_GOT_TLSGD16:
5502 case R_PPC64_GOT_TLSGD16_LO:
5503 case R_PPC64_GOT_TLSGD16_HI:
5504 case R_PPC64_GOT_TLSGD16_HA:
5505 tls_type = TLS_TLS | TLS_GD;
5506 goto dogottls;
5507
5508 case R_PPC64_GOT_TPREL16_DS:
5509 case R_PPC64_GOT_TPREL16_LO_DS:
5510 case R_PPC64_GOT_TPREL16_HI:
5511 case R_PPC64_GOT_TPREL16_HA:
5512 if (bfd_link_dll (info))
5513 info->flags |= DF_STATIC_TLS;
5514 tls_type = TLS_TLS | TLS_TPREL;
5515 goto dogottls;
5516
5517 case R_PPC64_GOT_DTPREL16_DS:
5518 case R_PPC64_GOT_DTPREL16_LO_DS:
5519 case R_PPC64_GOT_DTPREL16_HI:
5520 case R_PPC64_GOT_DTPREL16_HA:
5521 tls_type = TLS_TLS | TLS_DTPREL;
5522 dogottls:
5523 sec->has_tls_reloc = 1;
5524 /* Fall through */
5525
5526 case R_PPC64_GOT16:
5527 case R_PPC64_GOT16_DS:
5528 case R_PPC64_GOT16_HA:
5529 case R_PPC64_GOT16_HI:
5530 case R_PPC64_GOT16_LO:
5531 case R_PPC64_GOT16_LO_DS:
5532 /* This symbol requires a global offset table entry. */
5533 sec->has_toc_reloc = 1;
5534 if (r_type == R_PPC64_GOT_TLSLD16
5535 || r_type == R_PPC64_GOT_TLSGD16
5536 || r_type == R_PPC64_GOT_TPREL16_DS
5537 || r_type == R_PPC64_GOT_DTPREL16_DS
5538 || r_type == R_PPC64_GOT16
5539 || r_type == R_PPC64_GOT16_DS)
5540 {
5541 htab->do_multi_toc = 1;
5542 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5543 }
5544
5545 if (ppc64_elf_tdata (abfd)->got == NULL
5546 && !create_got_section (abfd, info))
5547 return FALSE;
5548
5549 if (h != NULL)
5550 {
5551 struct ppc_link_hash_entry *eh;
5552 struct got_entry *ent;
5553
5554 eh = (struct ppc_link_hash_entry *) h;
5555 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5556 if (ent->addend == rel->r_addend
5557 && ent->owner == abfd
5558 && ent->tls_type == tls_type)
5559 break;
5560 if (ent == NULL)
5561 {
5562 bfd_size_type amt = sizeof (*ent);
5563 ent = bfd_alloc (abfd, amt);
5564 if (ent == NULL)
5565 return FALSE;
5566 ent->next = eh->elf.got.glist;
5567 ent->addend = rel->r_addend;
5568 ent->owner = abfd;
5569 ent->tls_type = tls_type;
5570 ent->is_indirect = FALSE;
5571 ent->got.refcount = 0;
5572 eh->elf.got.glist = ent;
5573 }
5574 ent->got.refcount += 1;
5575 eh->tls_mask |= tls_type;
5576 }
5577 else
5578 /* This is a global offset table entry for a local symbol. */
5579 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5580 rel->r_addend, tls_type))
5581 return FALSE;
5582
5583 /* We may also need a plt entry if the symbol turns out to be
5584 an ifunc. */
5585 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5586 {
5587 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5588 return FALSE;
5589 }
5590 break;
5591
5592 case R_PPC64_PLT16_HA:
5593 case R_PPC64_PLT16_HI:
5594 case R_PPC64_PLT16_LO:
5595 case R_PPC64_PLT32:
5596 case R_PPC64_PLT64:
5597 /* This symbol requires a procedure linkage table entry. */
5598 plt_list = ifunc;
5599 if (h != NULL)
5600 {
5601 h->needs_plt = 1;
5602 if (h->root.root.string[0] == '.'
5603 && h->root.root.string[1] != '\0')
5604 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5605 plt_list = &h->plt.plist;
5606 }
5607 if (plt_list == NULL)
5608 {
5609 /* It does not make sense to have a procedure linkage
5610 table entry for a non-ifunc local symbol. */
5611 info->callbacks->einfo
5612 /* xgettext:c-format */
5613 (_("%H: %s reloc against local symbol\n"),
5614 abfd, sec, rel->r_offset,
5615 ppc64_elf_howto_table[r_type]->name);
5616 bfd_set_error (bfd_error_bad_value);
5617 return FALSE;
5618 }
5619 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5620 return FALSE;
5621 break;
5622
5623 /* The following relocations don't need to propagate the
5624 relocation if linking a shared object since they are
5625 section relative. */
5626 case R_PPC64_SECTOFF:
5627 case R_PPC64_SECTOFF_LO:
5628 case R_PPC64_SECTOFF_HI:
5629 case R_PPC64_SECTOFF_HA:
5630 case R_PPC64_SECTOFF_DS:
5631 case R_PPC64_SECTOFF_LO_DS:
5632 case R_PPC64_DTPREL16:
5633 case R_PPC64_DTPREL16_LO:
5634 case R_PPC64_DTPREL16_HI:
5635 case R_PPC64_DTPREL16_HA:
5636 case R_PPC64_DTPREL16_DS:
5637 case R_PPC64_DTPREL16_LO_DS:
5638 case R_PPC64_DTPREL16_HIGH:
5639 case R_PPC64_DTPREL16_HIGHA:
5640 case R_PPC64_DTPREL16_HIGHER:
5641 case R_PPC64_DTPREL16_HIGHERA:
5642 case R_PPC64_DTPREL16_HIGHEST:
5643 case R_PPC64_DTPREL16_HIGHESTA:
5644 break;
5645
5646 /* Nor do these. */
5647 case R_PPC64_REL16:
5648 case R_PPC64_REL16_LO:
5649 case R_PPC64_REL16_HI:
5650 case R_PPC64_REL16_HA:
5651 case R_PPC64_REL16DX_HA:
5652 break;
5653
5654 /* Not supported as a dynamic relocation. */
5655 case R_PPC64_ADDR64_LOCAL:
5656 if (bfd_link_pic (info))
5657 {
5658 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5659 ppc_howto_init ();
5660 /* xgettext:c-format */
5661 info->callbacks->einfo (_("%H: %s reloc unsupported "
5662 "in shared libraries and PIEs.\n"),
5663 abfd, sec, rel->r_offset,
5664 ppc64_elf_howto_table[r_type]->name);
5665 bfd_set_error (bfd_error_bad_value);
5666 return FALSE;
5667 }
5668 break;
5669
5670 case R_PPC64_TOC16:
5671 case R_PPC64_TOC16_DS:
5672 htab->do_multi_toc = 1;
5673 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5674 /* Fall through. */
5675 case R_PPC64_TOC16_LO:
5676 case R_PPC64_TOC16_HI:
5677 case R_PPC64_TOC16_HA:
5678 case R_PPC64_TOC16_LO_DS:
5679 sec->has_toc_reloc = 1;
5680 break;
5681
5682 /* Marker reloc. */
5683 case R_PPC64_ENTRY:
5684 break;
5685
5686 /* This relocation describes the C++ object vtable hierarchy.
5687 Reconstruct it for later use during GC. */
5688 case R_PPC64_GNU_VTINHERIT:
5689 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5690 return FALSE;
5691 break;
5692
5693 /* This relocation describes which C++ vtable entries are actually
5694 used. Record for later use during GC. */
5695 case R_PPC64_GNU_VTENTRY:
5696 BFD_ASSERT (h != NULL);
5697 if (h != NULL
5698 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5699 return FALSE;
5700 break;
5701
5702 case R_PPC64_REL14:
5703 case R_PPC64_REL14_BRTAKEN:
5704 case R_PPC64_REL14_BRNTAKEN:
5705 {
5706 asection *dest = NULL;
5707
5708 /* Heuristic: If jumping outside our section, chances are
5709 we are going to need a stub. */
5710 if (h != NULL)
5711 {
5712 /* If the sym is weak it may be overridden later, so
5713 don't assume we know where a weak sym lives. */
5714 if (h->root.type == bfd_link_hash_defined)
5715 dest = h->root.u.def.section;
5716 }
5717 else
5718 {
5719 Elf_Internal_Sym *isym;
5720
5721 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5722 abfd, r_symndx);
5723 if (isym == NULL)
5724 return FALSE;
5725
5726 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5727 }
5728
5729 if (dest != sec)
5730 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5731 }
5732 /* Fall through. */
5733
5734 case R_PPC64_REL24:
5735 plt_list = ifunc;
5736 if (h != NULL)
5737 {
5738 h->needs_plt = 1;
5739 if (h->root.root.string[0] == '.'
5740 && h->root.root.string[1] != '\0')
5741 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5742
5743 if (h == tga || h == dottga)
5744 {
5745 sec->has_tls_reloc = 1;
5746 if (rel != relocs
5747 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5748 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5749 /* We have a new-style __tls_get_addr call with
5750 a marker reloc. */
5751 ;
5752 else
5753 /* Mark this section as having an old-style call. */
5754 sec->has_tls_get_addr_call = 1;
5755 }
5756 plt_list = &h->plt.plist;
5757 }
5758
5759 /* We may need a .plt entry if the function this reloc
5760 refers to is in a shared lib. */
5761 if (plt_list
5762 && !update_plt_info (abfd, plt_list, rel->r_addend))
5763 return FALSE;
5764 break;
5765
5766 case R_PPC64_ADDR14:
5767 case R_PPC64_ADDR14_BRNTAKEN:
5768 case R_PPC64_ADDR14_BRTAKEN:
5769 case R_PPC64_ADDR24:
5770 goto dodyn;
5771
5772 case R_PPC64_TPREL64:
5773 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5774 if (bfd_link_dll (info))
5775 info->flags |= DF_STATIC_TLS;
5776 goto dotlstoc;
5777
5778 case R_PPC64_DTPMOD64:
5779 if (rel + 1 < rel_end
5780 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5781 && rel[1].r_offset == rel->r_offset + 8)
5782 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5783 else
5784 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5785 goto dotlstoc;
5786
5787 case R_PPC64_DTPREL64:
5788 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5789 if (rel != relocs
5790 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5791 && rel[-1].r_offset == rel->r_offset - 8)
5792 /* This is the second reloc of a dtpmod, dtprel pair.
5793 Don't mark with TLS_DTPREL. */
5794 goto dodyn;
5795
5796 dotlstoc:
5797 sec->has_tls_reloc = 1;
5798 if (h != NULL)
5799 {
5800 struct ppc_link_hash_entry *eh;
5801 eh = (struct ppc_link_hash_entry *) h;
5802 eh->tls_mask |= tls_type;
5803 }
5804 else
5805 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5806 rel->r_addend, tls_type))
5807 return FALSE;
5808
5809 ppc64_sec = ppc64_elf_section_data (sec);
5810 if (ppc64_sec->sec_type != sec_toc)
5811 {
5812 bfd_size_type amt;
5813
5814 /* One extra to simplify get_tls_mask. */
5815 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5816 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5817 if (ppc64_sec->u.toc.symndx == NULL)
5818 return FALSE;
5819 amt = sec->size * sizeof (bfd_vma) / 8;
5820 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5821 if (ppc64_sec->u.toc.add == NULL)
5822 return FALSE;
5823 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5824 ppc64_sec->sec_type = sec_toc;
5825 }
5826 BFD_ASSERT (rel->r_offset % 8 == 0);
5827 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5828 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5829
5830 /* Mark the second slot of a GD or LD entry.
5831 -1 to indicate GD and -2 to indicate LD. */
5832 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5833 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5834 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5835 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5836 goto dodyn;
5837
5838 case R_PPC64_TPREL16:
5839 case R_PPC64_TPREL16_LO:
5840 case R_PPC64_TPREL16_HI:
5841 case R_PPC64_TPREL16_HA:
5842 case R_PPC64_TPREL16_DS:
5843 case R_PPC64_TPREL16_LO_DS:
5844 case R_PPC64_TPREL16_HIGH:
5845 case R_PPC64_TPREL16_HIGHA:
5846 case R_PPC64_TPREL16_HIGHER:
5847 case R_PPC64_TPREL16_HIGHERA:
5848 case R_PPC64_TPREL16_HIGHEST:
5849 case R_PPC64_TPREL16_HIGHESTA:
5850 if (bfd_link_dll (info))
5851 info->flags |= DF_STATIC_TLS;
5852 goto dodyn;
5853
5854 case R_PPC64_ADDR64:
5855 if (is_opd
5856 && rel + 1 < rel_end
5857 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5858 {
5859 if (h != NULL)
5860 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5861 }
5862 /* Fall through. */
5863
5864 case R_PPC64_ADDR16:
5865 case R_PPC64_ADDR16_DS:
5866 case R_PPC64_ADDR16_HA:
5867 case R_PPC64_ADDR16_HI:
5868 case R_PPC64_ADDR16_HIGH:
5869 case R_PPC64_ADDR16_HIGHA:
5870 case R_PPC64_ADDR16_HIGHER:
5871 case R_PPC64_ADDR16_HIGHERA:
5872 case R_PPC64_ADDR16_HIGHEST:
5873 case R_PPC64_ADDR16_HIGHESTA:
5874 case R_PPC64_ADDR16_LO:
5875 case R_PPC64_ADDR16_LO_DS:
5876 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5877 && rel->r_addend == 0)
5878 {
5879 /* We may need a .plt entry if this reloc refers to a
5880 function in a shared lib. */
5881 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5882 return FALSE;
5883 h->pointer_equality_needed = 1;
5884 }
5885 /* Fall through. */
5886
5887 case R_PPC64_REL30:
5888 case R_PPC64_REL32:
5889 case R_PPC64_REL64:
5890 case R_PPC64_ADDR32:
5891 case R_PPC64_UADDR16:
5892 case R_PPC64_UADDR32:
5893 case R_PPC64_UADDR64:
5894 case R_PPC64_TOC:
5895 if (h != NULL && !bfd_link_pic (info))
5896 /* We may need a copy reloc. */
5897 h->non_got_ref = 1;
5898
5899 /* Don't propagate .opd relocs. */
5900 if (NO_OPD_RELOCS && is_opd)
5901 break;
5902
5903 /* If we are creating a shared library, and this is a reloc
5904 against a global symbol, or a non PC relative reloc
5905 against a local symbol, then we need to copy the reloc
5906 into the shared library. However, if we are linking with
5907 -Bsymbolic, we do not need to copy a reloc against a
5908 global symbol which is defined in an object we are
5909 including in the link (i.e., DEF_REGULAR is set). At
5910 this point we have not seen all the input files, so it is
5911 possible that DEF_REGULAR is not set now but will be set
5912 later (it is never cleared). In case of a weak definition,
5913 DEF_REGULAR may be cleared later by a strong definition in
5914 a shared library. We account for that possibility below by
5915 storing information in the dyn_relocs field of the hash
5916 table entry. A similar situation occurs when creating
5917 shared libraries and symbol visibility changes render the
5918 symbol local.
5919
5920 If on the other hand, we are creating an executable, we
5921 may need to keep relocations for symbols satisfied by a
5922 dynamic library if we manage to avoid copy relocs for the
5923 symbol. */
5924 dodyn:
5925 if ((bfd_link_pic (info)
5926 && (must_be_dyn_reloc (info, r_type)
5927 || (h != NULL
5928 && (!SYMBOLIC_BIND (info, h)
5929 || h->root.type == bfd_link_hash_defweak
5930 || !h->def_regular))))
5931 || (ELIMINATE_COPY_RELOCS
5932 && !bfd_link_pic (info)
5933 && h != NULL
5934 && (h->root.type == bfd_link_hash_defweak
5935 || !h->def_regular))
5936 || (!bfd_link_pic (info)
5937 && ifunc != NULL))
5938 {
5939 /* We must copy these reloc types into the output file.
5940 Create a reloc section in dynobj and make room for
5941 this reloc. */
5942 if (sreloc == NULL)
5943 {
5944 sreloc = _bfd_elf_make_dynamic_reloc_section
5945 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5946
5947 if (sreloc == NULL)
5948 return FALSE;
5949 }
5950
5951 /* If this is a global symbol, we count the number of
5952 relocations we need for this symbol. */
5953 if (h != NULL)
5954 {
5955 struct elf_dyn_relocs *p;
5956 struct elf_dyn_relocs **head;
5957
5958 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5959 p = *head;
5960 if (p == NULL || p->sec != sec)
5961 {
5962 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5963 if (p == NULL)
5964 return FALSE;
5965 p->next = *head;
5966 *head = p;
5967 p->sec = sec;
5968 p->count = 0;
5969 p->pc_count = 0;
5970 }
5971 p->count += 1;
5972 if (!must_be_dyn_reloc (info, r_type))
5973 p->pc_count += 1;
5974 }
5975 else
5976 {
5977 /* Track dynamic relocs needed for local syms too.
5978 We really need local syms available to do this
5979 easily. Oh well. */
5980 struct ppc_dyn_relocs *p;
5981 struct ppc_dyn_relocs **head;
5982 bfd_boolean is_ifunc;
5983 asection *s;
5984 void *vpp;
5985 Elf_Internal_Sym *isym;
5986
5987 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5988 abfd, r_symndx);
5989 if (isym == NULL)
5990 return FALSE;
5991
5992 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5993 if (s == NULL)
5994 s = sec;
5995
5996 vpp = &elf_section_data (s)->local_dynrel;
5997 head = (struct ppc_dyn_relocs **) vpp;
5998 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5999 p = *head;
6000 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6001 p = p->next;
6002 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6003 {
6004 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6005 if (p == NULL)
6006 return FALSE;
6007 p->next = *head;
6008 *head = p;
6009 p->sec = sec;
6010 p->ifunc = is_ifunc;
6011 p->count = 0;
6012 }
6013 p->count += 1;
6014 }
6015 }
6016 break;
6017
6018 default:
6019 break;
6020 }
6021 }
6022
6023 return TRUE;
6024 }
6025
6026 /* Merge backend specific data from an object file to the output
6027 object file when linking. */
6028
6029 static bfd_boolean
6030 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6031 {
6032 bfd *obfd = info->output_bfd;
6033 unsigned long iflags, oflags;
6034
6035 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6036 return TRUE;
6037
6038 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6039 return TRUE;
6040
6041 if (!_bfd_generic_verify_endian_match (ibfd, info))
6042 return FALSE;
6043
6044 iflags = elf_elfheader (ibfd)->e_flags;
6045 oflags = elf_elfheader (obfd)->e_flags;
6046
6047 if (iflags & ~EF_PPC64_ABI)
6048 {
6049 _bfd_error_handler
6050 /* xgettext:c-format */
6051 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6052 bfd_set_error (bfd_error_bad_value);
6053 return FALSE;
6054 }
6055 else if (iflags != oflags && iflags != 0)
6056 {
6057 _bfd_error_handler
6058 /* xgettext:c-format */
6059 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6060 ibfd, iflags, oflags);
6061 bfd_set_error (bfd_error_bad_value);
6062 return FALSE;
6063 }
6064
6065 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6066
6067 /* Merge Tag_compatibility attributes and any common GNU ones. */
6068 _bfd_elf_merge_object_attributes (ibfd, info);
6069
6070 return TRUE;
6071 }
6072
6073 static bfd_boolean
6074 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6075 {
6076 /* Print normal ELF private data. */
6077 _bfd_elf_print_private_bfd_data (abfd, ptr);
6078
6079 if (elf_elfheader (abfd)->e_flags != 0)
6080 {
6081 FILE *file = ptr;
6082
6083 fprintf (file, _("private flags = 0x%lx:"),
6084 elf_elfheader (abfd)->e_flags);
6085
6086 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6087 fprintf (file, _(" [abiv%ld]"),
6088 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6089 fputc ('\n', file);
6090 }
6091
6092 return TRUE;
6093 }
6094
6095 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6096 of the code entry point, and its section, which must be in the same
6097 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6098
6099 static bfd_vma
6100 opd_entry_value (asection *opd_sec,
6101 bfd_vma offset,
6102 asection **code_sec,
6103 bfd_vma *code_off,
6104 bfd_boolean in_code_sec)
6105 {
6106 bfd *opd_bfd = opd_sec->owner;
6107 Elf_Internal_Rela *relocs;
6108 Elf_Internal_Rela *lo, *hi, *look;
6109 bfd_vma val;
6110
6111 /* No relocs implies we are linking a --just-symbols object, or looking
6112 at a final linked executable with addr2line or somesuch. */
6113 if (opd_sec->reloc_count == 0)
6114 {
6115 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6116
6117 if (contents == NULL)
6118 {
6119 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6120 return (bfd_vma) -1;
6121 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6122 }
6123
6124 /* PR 17512: file: 64b9dfbb. */
6125 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6126 return (bfd_vma) -1;
6127
6128 val = bfd_get_64 (opd_bfd, contents + offset);
6129 if (code_sec != NULL)
6130 {
6131 asection *sec, *likely = NULL;
6132
6133 if (in_code_sec)
6134 {
6135 sec = *code_sec;
6136 if (sec->vma <= val
6137 && val < sec->vma + sec->size)
6138 likely = sec;
6139 else
6140 val = -1;
6141 }
6142 else
6143 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6144 if (sec->vma <= val
6145 && (sec->flags & SEC_LOAD) != 0
6146 && (sec->flags & SEC_ALLOC) != 0)
6147 likely = sec;
6148 if (likely != NULL)
6149 {
6150 *code_sec = likely;
6151 if (code_off != NULL)
6152 *code_off = val - likely->vma;
6153 }
6154 }
6155 return val;
6156 }
6157
6158 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6159
6160 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6161 if (relocs == NULL)
6162 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6163 /* PR 17512: file: df8e1fd6. */
6164 if (relocs == NULL)
6165 return (bfd_vma) -1;
6166
6167 /* Go find the opd reloc at the sym address. */
6168 lo = relocs;
6169 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6170 val = (bfd_vma) -1;
6171 while (lo < hi)
6172 {
6173 look = lo + (hi - lo) / 2;
6174 if (look->r_offset < offset)
6175 lo = look + 1;
6176 else if (look->r_offset > offset)
6177 hi = look;
6178 else
6179 {
6180 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6181
6182 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6183 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6184 {
6185 unsigned long symndx = ELF64_R_SYM (look->r_info);
6186 asection *sec = NULL;
6187
6188 if (symndx >= symtab_hdr->sh_info
6189 && elf_sym_hashes (opd_bfd) != NULL)
6190 {
6191 struct elf_link_hash_entry **sym_hashes;
6192 struct elf_link_hash_entry *rh;
6193
6194 sym_hashes = elf_sym_hashes (opd_bfd);
6195 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6196 if (rh != NULL)
6197 {
6198 rh = elf_follow_link (rh);
6199 if (rh->root.type != bfd_link_hash_defined
6200 && rh->root.type != bfd_link_hash_defweak)
6201 break;
6202 if (rh->root.u.def.section->owner == opd_bfd)
6203 {
6204 val = rh->root.u.def.value;
6205 sec = rh->root.u.def.section;
6206 }
6207 }
6208 }
6209
6210 if (sec == NULL)
6211 {
6212 Elf_Internal_Sym *sym;
6213
6214 if (symndx < symtab_hdr->sh_info)
6215 {
6216 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6217 if (sym == NULL)
6218 {
6219 size_t symcnt = symtab_hdr->sh_info;
6220 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6221 symcnt, 0,
6222 NULL, NULL, NULL);
6223 if (sym == NULL)
6224 break;
6225 symtab_hdr->contents = (bfd_byte *) sym;
6226 }
6227 sym += symndx;
6228 }
6229 else
6230 {
6231 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6232 1, symndx,
6233 NULL, NULL, NULL);
6234 if (sym == NULL)
6235 break;
6236 }
6237 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6238 if (sec == NULL)
6239 break;
6240 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6241 val = sym->st_value;
6242 }
6243
6244 val += look->r_addend;
6245 if (code_off != NULL)
6246 *code_off = val;
6247 if (code_sec != NULL)
6248 {
6249 if (in_code_sec && *code_sec != sec)
6250 return -1;
6251 else
6252 *code_sec = sec;
6253 }
6254 if (sec->output_section != NULL)
6255 val += sec->output_section->vma + sec->output_offset;
6256 }
6257 break;
6258 }
6259 }
6260
6261 return val;
6262 }
6263
6264 /* If the ELF symbol SYM might be a function in SEC, return the
6265 function size and set *CODE_OFF to the function's entry point,
6266 otherwise return zero. */
6267
6268 static bfd_size_type
6269 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6270 bfd_vma *code_off)
6271 {
6272 bfd_size_type size;
6273
6274 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6275 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6276 return 0;
6277
6278 size = 0;
6279 if (!(sym->flags & BSF_SYNTHETIC))
6280 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6281
6282 if (strcmp (sym->section->name, ".opd") == 0)
6283 {
6284 struct _opd_sec_data *opd = get_opd_info (sym->section);
6285 bfd_vma symval = sym->value;
6286
6287 if (opd != NULL
6288 && opd->adjust != NULL
6289 && elf_section_data (sym->section)->relocs != NULL)
6290 {
6291 /* opd_entry_value will use cached relocs that have been
6292 adjusted, but with raw symbols. That means both local
6293 and global symbols need adjusting. */
6294 long adjust = opd->adjust[OPD_NDX (symval)];
6295 if (adjust == -1)
6296 return 0;
6297 symval += adjust;
6298 }
6299
6300 if (opd_entry_value (sym->section, symval,
6301 &sec, code_off, TRUE) == (bfd_vma) -1)
6302 return 0;
6303 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6304 symbol. This size has nothing to do with the code size of the
6305 function, which is what we're supposed to return, but the
6306 code size isn't available without looking up the dot-sym.
6307 However, doing that would be a waste of time particularly
6308 since elf_find_function will look at the dot-sym anyway.
6309 Now, elf_find_function will keep the largest size of any
6310 function sym found at the code address of interest, so return
6311 1 here to avoid it incorrectly caching a larger function size
6312 for a small function. This does mean we return the wrong
6313 size for a new-ABI function of size 24, but all that does is
6314 disable caching for such functions. */
6315 if (size == 24)
6316 size = 1;
6317 }
6318 else
6319 {
6320 if (sym->section != sec)
6321 return 0;
6322 *code_off = sym->value;
6323 }
6324 if (size == 0)
6325 size = 1;
6326 return size;
6327 }
6328
6329 /* Return true if symbol is a strong function defined in an ELFv2
6330 object with st_other localentry bits of zero, ie. its local entry
6331 point coincides with its global entry point. */
6332
6333 static bfd_boolean
6334 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6335 {
6336 return (h != NULL
6337 && h->type == STT_FUNC
6338 && h->root.type == bfd_link_hash_defined
6339 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6340 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6341 && is_ppc64_elf (h->root.u.def.section->owner)
6342 && abiversion (h->root.u.def.section->owner) >= 2);
6343 }
6344
6345 /* Return true if symbol is defined in a regular object file. */
6346
6347 static bfd_boolean
6348 is_static_defined (struct elf_link_hash_entry *h)
6349 {
6350 return ((h->root.type == bfd_link_hash_defined
6351 || h->root.type == bfd_link_hash_defweak)
6352 && h->root.u.def.section != NULL
6353 && h->root.u.def.section->output_section != NULL);
6354 }
6355
6356 /* If FDH is a function descriptor symbol, return the associated code
6357 entry symbol if it is defined. Return NULL otherwise. */
6358
6359 static struct ppc_link_hash_entry *
6360 defined_code_entry (struct ppc_link_hash_entry *fdh)
6361 {
6362 if (fdh->is_func_descriptor)
6363 {
6364 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6365 if (fh->elf.root.type == bfd_link_hash_defined
6366 || fh->elf.root.type == bfd_link_hash_defweak)
6367 return fh;
6368 }
6369 return NULL;
6370 }
6371
6372 /* If FH is a function code entry symbol, return the associated
6373 function descriptor symbol if it is defined. Return NULL otherwise. */
6374
6375 static struct ppc_link_hash_entry *
6376 defined_func_desc (struct ppc_link_hash_entry *fh)
6377 {
6378 if (fh->oh != NULL
6379 && fh->oh->is_func_descriptor)
6380 {
6381 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6382 if (fdh->elf.root.type == bfd_link_hash_defined
6383 || fdh->elf.root.type == bfd_link_hash_defweak)
6384 return fdh;
6385 }
6386 return NULL;
6387 }
6388
6389 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6390
6391 /* Garbage collect sections, after first dealing with dot-symbols. */
6392
6393 static bfd_boolean
6394 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6395 {
6396 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6397
6398 if (htab != NULL && htab->need_func_desc_adj)
6399 {
6400 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6401 htab->need_func_desc_adj = 0;
6402 }
6403 return bfd_elf_gc_sections (abfd, info);
6404 }
6405
6406 /* Mark all our entry sym sections, both opd and code section. */
6407
6408 static void
6409 ppc64_elf_gc_keep (struct bfd_link_info *info)
6410 {
6411 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6412 struct bfd_sym_chain *sym;
6413
6414 if (htab == NULL)
6415 return;
6416
6417 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6418 {
6419 struct ppc_link_hash_entry *eh, *fh;
6420 asection *sec;
6421
6422 eh = (struct ppc_link_hash_entry *)
6423 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6424 if (eh == NULL)
6425 continue;
6426 if (eh->elf.root.type != bfd_link_hash_defined
6427 && eh->elf.root.type != bfd_link_hash_defweak)
6428 continue;
6429
6430 fh = defined_code_entry (eh);
6431 if (fh != NULL)
6432 {
6433 sec = fh->elf.root.u.def.section;
6434 sec->flags |= SEC_KEEP;
6435 }
6436 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6437 && opd_entry_value (eh->elf.root.u.def.section,
6438 eh->elf.root.u.def.value,
6439 &sec, NULL, FALSE) != (bfd_vma) -1)
6440 sec->flags |= SEC_KEEP;
6441
6442 sec = eh->elf.root.u.def.section;
6443 sec->flags |= SEC_KEEP;
6444 }
6445 }
6446
6447 /* Mark sections containing dynamically referenced symbols. When
6448 building shared libraries, we must assume that any visible symbol is
6449 referenced. */
6450
6451 static bfd_boolean
6452 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6453 {
6454 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6455 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6456 struct ppc_link_hash_entry *fdh;
6457 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6458
6459 /* Dynamic linking info is on the func descriptor sym. */
6460 fdh = defined_func_desc (eh);
6461 if (fdh != NULL)
6462 eh = fdh;
6463
6464 if ((eh->elf.root.type == bfd_link_hash_defined
6465 || eh->elf.root.type == bfd_link_hash_defweak)
6466 && (eh->elf.ref_dynamic
6467 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6468 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6469 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6470 && (!bfd_link_executable (info)
6471 || info->gc_keep_exported
6472 || info->export_dynamic
6473 || (eh->elf.dynamic
6474 && d != NULL
6475 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6476 && (eh->elf.versioned >= versioned
6477 || !bfd_hide_sym_by_version (info->version_info,
6478 eh->elf.root.root.string)))))
6479 {
6480 asection *code_sec;
6481 struct ppc_link_hash_entry *fh;
6482
6483 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6484
6485 /* Function descriptor syms cause the associated
6486 function code sym section to be marked. */
6487 fh = defined_code_entry (eh);
6488 if (fh != NULL)
6489 {
6490 code_sec = fh->elf.root.u.def.section;
6491 code_sec->flags |= SEC_KEEP;
6492 }
6493 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6494 && opd_entry_value (eh->elf.root.u.def.section,
6495 eh->elf.root.u.def.value,
6496 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6497 code_sec->flags |= SEC_KEEP;
6498 }
6499
6500 return TRUE;
6501 }
6502
6503 /* Return the section that should be marked against GC for a given
6504 relocation. */
6505
6506 static asection *
6507 ppc64_elf_gc_mark_hook (asection *sec,
6508 struct bfd_link_info *info,
6509 Elf_Internal_Rela *rel,
6510 struct elf_link_hash_entry *h,
6511 Elf_Internal_Sym *sym)
6512 {
6513 asection *rsec;
6514
6515 /* Syms return NULL if we're marking .opd, so we avoid marking all
6516 function sections, as all functions are referenced in .opd. */
6517 rsec = NULL;
6518 if (get_opd_info (sec) != NULL)
6519 return rsec;
6520
6521 if (h != NULL)
6522 {
6523 enum elf_ppc64_reloc_type r_type;
6524 struct ppc_link_hash_entry *eh, *fh, *fdh;
6525
6526 r_type = ELF64_R_TYPE (rel->r_info);
6527 switch (r_type)
6528 {
6529 case R_PPC64_GNU_VTINHERIT:
6530 case R_PPC64_GNU_VTENTRY:
6531 break;
6532
6533 default:
6534 switch (h->root.type)
6535 {
6536 case bfd_link_hash_defined:
6537 case bfd_link_hash_defweak:
6538 eh = (struct ppc_link_hash_entry *) h;
6539 fdh = defined_func_desc (eh);
6540 if (fdh != NULL)
6541 {
6542 /* -mcall-aixdesc code references the dot-symbol on
6543 a call reloc. Mark the function descriptor too
6544 against garbage collection. */
6545 fdh->elf.mark = 1;
6546 if (fdh->elf.is_weakalias)
6547 weakdef (&fdh->elf)->mark = 1;
6548 eh = fdh;
6549 }
6550
6551 /* Function descriptor syms cause the associated
6552 function code sym section to be marked. */
6553 fh = defined_code_entry (eh);
6554 if (fh != NULL)
6555 {
6556 /* They also mark their opd section. */
6557 eh->elf.root.u.def.section->gc_mark = 1;
6558
6559 rsec = fh->elf.root.u.def.section;
6560 }
6561 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6562 && opd_entry_value (eh->elf.root.u.def.section,
6563 eh->elf.root.u.def.value,
6564 &rsec, NULL, FALSE) != (bfd_vma) -1)
6565 eh->elf.root.u.def.section->gc_mark = 1;
6566 else
6567 rsec = h->root.u.def.section;
6568 break;
6569
6570 case bfd_link_hash_common:
6571 rsec = h->root.u.c.p->section;
6572 break;
6573
6574 default:
6575 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6576 }
6577 }
6578 }
6579 else
6580 {
6581 struct _opd_sec_data *opd;
6582
6583 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6584 opd = get_opd_info (rsec);
6585 if (opd != NULL && opd->func_sec != NULL)
6586 {
6587 rsec->gc_mark = 1;
6588
6589 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6590 }
6591 }
6592
6593 return rsec;
6594 }
6595
6596 /* The maximum size of .sfpr. */
6597 #define SFPR_MAX (218*4)
6598
6599 struct sfpr_def_parms
6600 {
6601 const char name[12];
6602 unsigned char lo, hi;
6603 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6604 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6605 };
6606
6607 /* Auto-generate _save*, _rest* functions in .sfpr.
6608 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6609 instead. */
6610
6611 static bfd_boolean
6612 sfpr_define (struct bfd_link_info *info,
6613 const struct sfpr_def_parms *parm,
6614 asection *stub_sec)
6615 {
6616 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6617 unsigned int i;
6618 size_t len = strlen (parm->name);
6619 bfd_boolean writing = FALSE;
6620 char sym[16];
6621
6622 if (htab == NULL)
6623 return FALSE;
6624
6625 memcpy (sym, parm->name, len);
6626 sym[len + 2] = 0;
6627
6628 for (i = parm->lo; i <= parm->hi; i++)
6629 {
6630 struct ppc_link_hash_entry *h;
6631
6632 sym[len + 0] = i / 10 + '0';
6633 sym[len + 1] = i % 10 + '0';
6634 h = (struct ppc_link_hash_entry *)
6635 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6636 if (stub_sec != NULL)
6637 {
6638 if (h != NULL
6639 && h->elf.root.type == bfd_link_hash_defined
6640 && h->elf.root.u.def.section == htab->sfpr)
6641 {
6642 struct elf_link_hash_entry *s;
6643 char buf[32];
6644 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6645 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6646 if (s == NULL)
6647 return FALSE;
6648 if (s->root.type == bfd_link_hash_new
6649 || (s->root.type = bfd_link_hash_defined
6650 && s->root.u.def.section == stub_sec))
6651 {
6652 s->root.type = bfd_link_hash_defined;
6653 s->root.u.def.section = stub_sec;
6654 s->root.u.def.value = (stub_sec->size
6655 + h->elf.root.u.def.value);
6656 s->ref_regular = 1;
6657 s->def_regular = 1;
6658 s->ref_regular_nonweak = 1;
6659 s->forced_local = 1;
6660 s->non_elf = 0;
6661 s->root.linker_def = 1;
6662 }
6663 }
6664 continue;
6665 }
6666 if (h != NULL)
6667 {
6668 h->save_res = 1;
6669 if (!h->elf.def_regular)
6670 {
6671 h->elf.root.type = bfd_link_hash_defined;
6672 h->elf.root.u.def.section = htab->sfpr;
6673 h->elf.root.u.def.value = htab->sfpr->size;
6674 h->elf.type = STT_FUNC;
6675 h->elf.def_regular = 1;
6676 h->elf.non_elf = 0;
6677 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6678 writing = TRUE;
6679 if (htab->sfpr->contents == NULL)
6680 {
6681 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6682 if (htab->sfpr->contents == NULL)
6683 return FALSE;
6684 }
6685 }
6686 }
6687 if (writing)
6688 {
6689 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6690 if (i != parm->hi)
6691 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6692 else
6693 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6694 htab->sfpr->size = p - htab->sfpr->contents;
6695 }
6696 }
6697
6698 return TRUE;
6699 }
6700
6701 static bfd_byte *
6702 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6703 {
6704 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6705 return p + 4;
6706 }
6707
6708 static bfd_byte *
6709 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6710 {
6711 p = savegpr0 (abfd, p, r);
6712 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6713 p = p + 4;
6714 bfd_put_32 (abfd, BLR, p);
6715 return p + 4;
6716 }
6717
6718 static bfd_byte *
6719 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6720 {
6721 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6722 return p + 4;
6723 }
6724
6725 static bfd_byte *
6726 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6727 {
6728 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6729 p = p + 4;
6730 p = restgpr0 (abfd, p, r);
6731 bfd_put_32 (abfd, MTLR_R0, p);
6732 p = p + 4;
6733 if (r == 29)
6734 {
6735 p = restgpr0 (abfd, p, 30);
6736 p = restgpr0 (abfd, p, 31);
6737 }
6738 bfd_put_32 (abfd, BLR, p);
6739 return p + 4;
6740 }
6741
6742 static bfd_byte *
6743 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6744 {
6745 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6746 return p + 4;
6747 }
6748
6749 static bfd_byte *
6750 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6751 {
6752 p = savegpr1 (abfd, p, r);
6753 bfd_put_32 (abfd, BLR, p);
6754 return p + 4;
6755 }
6756
6757 static bfd_byte *
6758 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6759 {
6760 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6761 return p + 4;
6762 }
6763
6764 static bfd_byte *
6765 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6766 {
6767 p = restgpr1 (abfd, p, r);
6768 bfd_put_32 (abfd, BLR, p);
6769 return p + 4;
6770 }
6771
6772 static bfd_byte *
6773 savefpr (bfd *abfd, bfd_byte *p, int r)
6774 {
6775 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6776 return p + 4;
6777 }
6778
6779 static bfd_byte *
6780 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6781 {
6782 p = savefpr (abfd, p, r);
6783 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6784 p = p + 4;
6785 bfd_put_32 (abfd, BLR, p);
6786 return p + 4;
6787 }
6788
6789 static bfd_byte *
6790 restfpr (bfd *abfd, bfd_byte *p, int r)
6791 {
6792 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6793 return p + 4;
6794 }
6795
6796 static bfd_byte *
6797 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6798 {
6799 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6800 p = p + 4;
6801 p = restfpr (abfd, p, r);
6802 bfd_put_32 (abfd, MTLR_R0, p);
6803 p = p + 4;
6804 if (r == 29)
6805 {
6806 p = restfpr (abfd, p, 30);
6807 p = restfpr (abfd, p, 31);
6808 }
6809 bfd_put_32 (abfd, BLR, p);
6810 return p + 4;
6811 }
6812
6813 static bfd_byte *
6814 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6815 {
6816 p = savefpr (abfd, p, r);
6817 bfd_put_32 (abfd, BLR, p);
6818 return p + 4;
6819 }
6820
6821 static bfd_byte *
6822 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6823 {
6824 p = restfpr (abfd, p, r);
6825 bfd_put_32 (abfd, BLR, p);
6826 return p + 4;
6827 }
6828
6829 static bfd_byte *
6830 savevr (bfd *abfd, bfd_byte *p, int r)
6831 {
6832 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6833 p = p + 4;
6834 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6835 return p + 4;
6836 }
6837
6838 static bfd_byte *
6839 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6840 {
6841 p = savevr (abfd, p, r);
6842 bfd_put_32 (abfd, BLR, p);
6843 return p + 4;
6844 }
6845
6846 static bfd_byte *
6847 restvr (bfd *abfd, bfd_byte *p, int r)
6848 {
6849 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6850 p = p + 4;
6851 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6852 return p + 4;
6853 }
6854
6855 static bfd_byte *
6856 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6857 {
6858 p = restvr (abfd, p, r);
6859 bfd_put_32 (abfd, BLR, p);
6860 return p + 4;
6861 }
6862
6863 /* Called via elf_link_hash_traverse to transfer dynamic linking
6864 information on function code symbol entries to their corresponding
6865 function descriptor symbol entries. */
6866
6867 static bfd_boolean
6868 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6869 {
6870 struct bfd_link_info *info;
6871 struct ppc_link_hash_table *htab;
6872 struct ppc_link_hash_entry *fh;
6873 struct ppc_link_hash_entry *fdh;
6874 bfd_boolean force_local;
6875
6876 fh = (struct ppc_link_hash_entry *) h;
6877 if (fh->elf.root.type == bfd_link_hash_indirect)
6878 return TRUE;
6879
6880 if (!fh->is_func)
6881 return TRUE;
6882
6883 if (fh->elf.root.root.string[0] != '.'
6884 || fh->elf.root.root.string[1] == '\0')
6885 return TRUE;
6886
6887 info = inf;
6888 htab = ppc_hash_table (info);
6889 if (htab == NULL)
6890 return FALSE;
6891
6892 /* Find the corresponding function descriptor symbol. */
6893 fdh = lookup_fdh (fh, htab);
6894
6895 /* Resolve undefined references to dot-symbols as the value
6896 in the function descriptor, if we have one in a regular object.
6897 This is to satisfy cases like ".quad .foo". Calls to functions
6898 in dynamic objects are handled elsewhere. */
6899 if ((fh->elf.root.type == bfd_link_hash_undefined
6900 || fh->elf.root.type == bfd_link_hash_undefweak)
6901 && (fdh->elf.root.type == bfd_link_hash_defined
6902 || fdh->elf.root.type == bfd_link_hash_defweak)
6903 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6904 && opd_entry_value (fdh->elf.root.u.def.section,
6905 fdh->elf.root.u.def.value,
6906 &fh->elf.root.u.def.section,
6907 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6908 {
6909 fh->elf.root.type = fdh->elf.root.type;
6910 fh->elf.forced_local = 1;
6911 fh->elf.def_regular = fdh->elf.def_regular;
6912 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6913 }
6914
6915 if (!fh->elf.dynamic)
6916 {
6917 struct plt_entry *ent;
6918
6919 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6920 if (ent->plt.refcount > 0)
6921 break;
6922 if (ent == NULL)
6923 return TRUE;
6924 }
6925
6926 /* Create a descriptor as undefined if necessary. */
6927 if (fdh == NULL
6928 && !bfd_link_executable (info)
6929 && (fh->elf.root.type == bfd_link_hash_undefined
6930 || fh->elf.root.type == bfd_link_hash_undefweak))
6931 {
6932 fdh = make_fdh (info, fh);
6933 if (fdh == NULL)
6934 return FALSE;
6935 }
6936
6937 /* We can't support overriding of symbols on a fake descriptor. */
6938 if (fdh != NULL
6939 && fdh->fake
6940 && (fh->elf.root.type == bfd_link_hash_defined
6941 || fh->elf.root.type == bfd_link_hash_defweak))
6942 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6943
6944 /* Transfer dynamic linking information to the function descriptor. */
6945 if (fdh != NULL)
6946 {
6947 fdh->elf.ref_regular |= fh->elf.ref_regular;
6948 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6949 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6950 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6951 fdh->elf.dynamic |= fh->elf.dynamic;
6952 fdh->elf.needs_plt |= (fh->elf.needs_plt
6953 || fh->elf.type == STT_FUNC
6954 || fh->elf.type == STT_GNU_IFUNC);
6955 move_plt_plist (fh, fdh);
6956
6957 if (!fdh->elf.forced_local
6958 && fh->elf.dynindx != -1)
6959 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6960 return FALSE;
6961 }
6962
6963 /* Now that the info is on the function descriptor, clear the
6964 function code sym info. Any function code syms for which we
6965 don't have a definition in a regular file, we force local.
6966 This prevents a shared library from exporting syms that have
6967 been imported from another library. Function code syms that
6968 are really in the library we must leave global to prevent the
6969 linker dragging in a definition from a static library. */
6970 force_local = (!fh->elf.def_regular
6971 || fdh == NULL
6972 || !fdh->elf.def_regular
6973 || fdh->elf.forced_local);
6974 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6975
6976 return TRUE;
6977 }
6978
6979 static const struct sfpr_def_parms save_res_funcs[] =
6980 {
6981 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6982 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6983 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6984 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6985 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6986 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6987 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6988 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6989 { "._savef", 14, 31, savefpr, savefpr1_tail },
6990 { "._restf", 14, 31, restfpr, restfpr1_tail },
6991 { "_savevr_", 20, 31, savevr, savevr_tail },
6992 { "_restvr_", 20, 31, restvr, restvr_tail }
6993 };
6994
6995 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6996 this hook to a) provide some gcc support functions, and b) transfer
6997 dynamic linking information gathered so far on function code symbol
6998 entries, to their corresponding function descriptor symbol entries. */
6999
7000 static bfd_boolean
7001 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7002 struct bfd_link_info *info)
7003 {
7004 struct ppc_link_hash_table *htab;
7005
7006 htab = ppc_hash_table (info);
7007 if (htab == NULL)
7008 return FALSE;
7009
7010 /* Provide any missing _save* and _rest* functions. */
7011 if (htab->sfpr != NULL)
7012 {
7013 unsigned int i;
7014
7015 htab->sfpr->size = 0;
7016 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7017 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7018 return FALSE;
7019 if (htab->sfpr->size == 0)
7020 htab->sfpr->flags |= SEC_EXCLUDE;
7021 }
7022
7023 if (bfd_link_relocatable (info))
7024 return TRUE;
7025
7026 if (htab->elf.hgot != NULL)
7027 {
7028 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7029 /* Make .TOC. defined so as to prevent it being made dynamic.
7030 The wrong value here is fixed later in ppc64_elf_set_toc. */
7031 if (!htab->elf.hgot->def_regular
7032 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7033 {
7034 htab->elf.hgot->root.type = bfd_link_hash_defined;
7035 htab->elf.hgot->root.u.def.value = 0;
7036 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7037 htab->elf.hgot->def_regular = 1;
7038 htab->elf.hgot->root.linker_def = 1;
7039 }
7040 htab->elf.hgot->type = STT_OBJECT;
7041 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7042 | STV_HIDDEN);
7043 }
7044
7045 if (htab->need_func_desc_adj)
7046 {
7047 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7048 htab->need_func_desc_adj = 0;
7049 }
7050
7051 return TRUE;
7052 }
7053
7054 /* Find dynamic relocs for H that apply to read-only sections. */
7055
7056 static asection *
7057 readonly_dynrelocs (struct elf_link_hash_entry *h)
7058 {
7059 struct ppc_link_hash_entry *eh;
7060 struct elf_dyn_relocs *p;
7061
7062 eh = (struct ppc_link_hash_entry *) h;
7063 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7064 {
7065 asection *s = p->sec->output_section;
7066
7067 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7068 return p->sec;
7069 }
7070 return NULL;
7071 }
7072
7073 /* Return true if we have dynamic relocs against H or any of its weak
7074 aliases, that apply to read-only sections. Cannot be used after
7075 size_dynamic_sections. */
7076
7077 static bfd_boolean
7078 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7079 {
7080 struct ppc_link_hash_entry *eh;
7081
7082 eh = (struct ppc_link_hash_entry *) h;
7083 do
7084 {
7085 if (readonly_dynrelocs (&eh->elf))
7086 return TRUE;
7087 eh = (struct ppc_link_hash_entry *) eh->elf.u.alias;
7088 } while (eh != NULL && &eh->elf != h);
7089
7090 return FALSE;
7091 }
7092
7093 /* Return whether EH has pc-relative dynamic relocs. */
7094
7095 static bfd_boolean
7096 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7097 {
7098 struct elf_dyn_relocs *p;
7099
7100 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7101 if (p->pc_count != 0)
7102 return TRUE;
7103 return FALSE;
7104 }
7105
7106 /* Return true if a global entry stub will be created for H. Valid
7107 for ELFv2 before plt entries have been allocated. */
7108
7109 static bfd_boolean
7110 global_entry_stub (struct elf_link_hash_entry *h)
7111 {
7112 struct plt_entry *pent;
7113
7114 if (!h->pointer_equality_needed
7115 || h->def_regular)
7116 return FALSE;
7117
7118 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7119 if (pent->plt.refcount > 0
7120 && pent->addend == 0)
7121 return TRUE;
7122
7123 return FALSE;
7124 }
7125
7126 /* Adjust a symbol defined by a dynamic object and referenced by a
7127 regular object. The current definition is in some section of the
7128 dynamic object, but we're not including those sections. We have to
7129 change the definition to something the rest of the link can
7130 understand. */
7131
7132 static bfd_boolean
7133 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7134 struct elf_link_hash_entry *h)
7135 {
7136 struct ppc_link_hash_table *htab;
7137 asection *s, *srel;
7138
7139 htab = ppc_hash_table (info);
7140 if (htab == NULL)
7141 return FALSE;
7142
7143 /* Deal with function syms. */
7144 if (h->type == STT_FUNC
7145 || h->type == STT_GNU_IFUNC
7146 || h->needs_plt)
7147 {
7148 bfd_boolean local = (((struct ppc_link_hash_entry *) h)->save_res
7149 || SYMBOL_CALLS_LOCAL (info, h)
7150 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
7151 /* Discard dyn_relocs when non-pic if we've decided that a
7152 function symbol is local and not an ifunc. We keep dynamic
7153 relocs for ifuncs when local rather than always emitting a
7154 plt call stub for them and defining the symbol on the call
7155 stub. We can't do that for ELFv1 anyway (a function symbol
7156 is defined on a descriptor, not code) and it can be faster at
7157 run-time due to not needing to bounce through a stub. The
7158 dyn_relocs for ifuncs will be applied even in a static
7159 executable. */
7160 if (!bfd_link_pic (info)
7161 && h->type != STT_GNU_IFUNC
7162 && local)
7163 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7164
7165 /* Clear procedure linkage table information for any symbol that
7166 won't need a .plt entry. */
7167 struct plt_entry *ent;
7168 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7169 if (ent->plt.refcount > 0)
7170 break;
7171 if (ent == NULL
7172 || (h->type != STT_GNU_IFUNC && local))
7173 {
7174 h->plt.plist = NULL;
7175 h->needs_plt = 0;
7176 h->pointer_equality_needed = 0;
7177 }
7178 else if (abiversion (info->output_bfd) >= 2)
7179 {
7180 /* Taking a function's address in a read/write section
7181 doesn't require us to define the function symbol in the
7182 executable on a global entry stub. A dynamic reloc can
7183 be used instead. The reason we prefer a few more dynamic
7184 relocs is that calling via a global entry stub costs a
7185 few more instructions, and pointer_equality_needed causes
7186 extra work in ld.so when resolving these symbols. */
7187 if (global_entry_stub (h))
7188 {
7189 if (!readonly_dynrelocs (h))
7190 {
7191 h->pointer_equality_needed = 0;
7192 /* If we haven't seen a branch reloc then we don't need
7193 a plt entry. */
7194 if (!h->needs_plt)
7195 h->plt.plist = NULL;
7196 }
7197 else if (!bfd_link_pic (info))
7198 /* We are going to be defining the function symbol on the
7199 plt stub, so no dyn_relocs needed when non-pic. */
7200 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7201 }
7202
7203 /* ELFv2 function symbols can't have copy relocs. */
7204 return TRUE;
7205 }
7206 else if (!h->needs_plt
7207 && !readonly_dynrelocs (h))
7208 {
7209 /* If we haven't seen a branch reloc then we don't need a
7210 plt entry. */
7211 h->plt.plist = NULL;
7212 h->pointer_equality_needed = 0;
7213 return TRUE;
7214 }
7215 }
7216 else
7217 h->plt.plist = NULL;
7218
7219 /* If this is a weak symbol, and there is a real definition, the
7220 processor independent code will have arranged for us to see the
7221 real definition first, and we can just use the same value. */
7222 if (h->is_weakalias)
7223 {
7224 struct elf_link_hash_entry *def = weakdef (h);
7225 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
7226 h->root.u.def.section = def->root.u.def.section;
7227 h->root.u.def.value = def->root.u.def.value;
7228 if (ELIMINATE_COPY_RELOCS)
7229 h->non_got_ref = def->non_got_ref;
7230 return TRUE;
7231 }
7232
7233 /* If we are creating a shared library, we must presume that the
7234 only references to the symbol are via the global offset table.
7235 For such cases we need not do anything here; the relocations will
7236 be handled correctly by relocate_section. */
7237 if (bfd_link_pic (info))
7238 return TRUE;
7239
7240 /* If there are no references to this symbol that do not use the
7241 GOT, we don't need to generate a copy reloc. */
7242 if (!h->non_got_ref)
7243 return TRUE;
7244
7245 /* Don't generate a copy reloc for symbols defined in the executable. */
7246 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7247
7248 /* If -z nocopyreloc was given, don't generate them either. */
7249 || info->nocopyreloc
7250
7251 /* If we didn't find any dynamic relocs in read-only sections, then
7252 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7253 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7254
7255 /* Protected variables do not work with .dynbss. The copy in
7256 .dynbss won't be used by the shared library with the protected
7257 definition for the variable. Text relocations are preferable
7258 to an incorrect program. */
7259 || h->protected_def)
7260 return TRUE;
7261
7262 if (h->plt.plist != NULL)
7263 {
7264 /* We should never get here, but unfortunately there are versions
7265 of gcc out there that improperly (for this ABI) put initialized
7266 function pointers, vtable refs and suchlike in read-only
7267 sections. Allow them to proceed, but warn that this might
7268 break at runtime. */
7269 info->callbacks->einfo
7270 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7271 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7272 h->root.root.string);
7273 }
7274
7275 /* This is a reference to a symbol defined by a dynamic object which
7276 is not a function. */
7277
7278 /* We must allocate the symbol in our .dynbss section, which will
7279 become part of the .bss section of the executable. There will be
7280 an entry for this symbol in the .dynsym section. The dynamic
7281 object will contain position independent code, so all references
7282 from the dynamic object to this symbol will go through the global
7283 offset table. The dynamic linker will use the .dynsym entry to
7284 determine the address it must put in the global offset table, so
7285 both the dynamic object and the regular object will refer to the
7286 same memory location for the variable. */
7287
7288 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7289 to copy the initial value out of the dynamic object and into the
7290 runtime process image. We need to remember the offset into the
7291 .rela.bss section we are going to use. */
7292 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7293 {
7294 s = htab->elf.sdynrelro;
7295 srel = htab->elf.sreldynrelro;
7296 }
7297 else
7298 {
7299 s = htab->elf.sdynbss;
7300 srel = htab->elf.srelbss;
7301 }
7302 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7303 {
7304 srel->size += sizeof (Elf64_External_Rela);
7305 h->needs_copy = 1;
7306 }
7307
7308 /* We no longer want dyn_relocs. */
7309 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7310 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7311 }
7312
7313 /* If given a function descriptor symbol, hide both the function code
7314 sym and the descriptor. */
7315 static void
7316 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7317 struct elf_link_hash_entry *h,
7318 bfd_boolean force_local)
7319 {
7320 struct ppc_link_hash_entry *eh;
7321 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7322
7323 eh = (struct ppc_link_hash_entry *) h;
7324 if (eh->is_func_descriptor)
7325 {
7326 struct ppc_link_hash_entry *fh = eh->oh;
7327
7328 if (fh == NULL)
7329 {
7330 const char *p, *q;
7331 struct elf_link_hash_table *htab = elf_hash_table (info);
7332 char save;
7333
7334 /* We aren't supposed to use alloca in BFD because on
7335 systems which do not have alloca the version in libiberty
7336 calls xmalloc, which might cause the program to crash
7337 when it runs out of memory. This function doesn't have a
7338 return status, so there's no way to gracefully return an
7339 error. So cheat. We know that string[-1] can be safely
7340 accessed; It's either a string in an ELF string table,
7341 or allocated in an objalloc structure. */
7342
7343 p = eh->elf.root.root.string - 1;
7344 save = *p;
7345 *(char *) p = '.';
7346 fh = (struct ppc_link_hash_entry *)
7347 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7348 *(char *) p = save;
7349
7350 /* Unfortunately, if it so happens that the string we were
7351 looking for was allocated immediately before this string,
7352 then we overwrote the string terminator. That's the only
7353 reason the lookup should fail. */
7354 if (fh == NULL)
7355 {
7356 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7357 while (q >= eh->elf.root.root.string && *q == *p)
7358 --q, --p;
7359 if (q < eh->elf.root.root.string && *p == '.')
7360 fh = (struct ppc_link_hash_entry *)
7361 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7362 }
7363 if (fh != NULL)
7364 {
7365 eh->oh = fh;
7366 fh->oh = eh;
7367 }
7368 }
7369 if (fh != NULL)
7370 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7371 }
7372 }
7373
7374 static bfd_boolean
7375 get_sym_h (struct elf_link_hash_entry **hp,
7376 Elf_Internal_Sym **symp,
7377 asection **symsecp,
7378 unsigned char **tls_maskp,
7379 Elf_Internal_Sym **locsymsp,
7380 unsigned long r_symndx,
7381 bfd *ibfd)
7382 {
7383 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7384
7385 if (r_symndx >= symtab_hdr->sh_info)
7386 {
7387 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7388 struct elf_link_hash_entry *h;
7389
7390 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7391 h = elf_follow_link (h);
7392
7393 if (hp != NULL)
7394 *hp = h;
7395
7396 if (symp != NULL)
7397 *symp = NULL;
7398
7399 if (symsecp != NULL)
7400 {
7401 asection *symsec = NULL;
7402 if (h->root.type == bfd_link_hash_defined
7403 || h->root.type == bfd_link_hash_defweak)
7404 symsec = h->root.u.def.section;
7405 *symsecp = symsec;
7406 }
7407
7408 if (tls_maskp != NULL)
7409 {
7410 struct ppc_link_hash_entry *eh;
7411
7412 eh = (struct ppc_link_hash_entry *) h;
7413 *tls_maskp = &eh->tls_mask;
7414 }
7415 }
7416 else
7417 {
7418 Elf_Internal_Sym *sym;
7419 Elf_Internal_Sym *locsyms = *locsymsp;
7420
7421 if (locsyms == NULL)
7422 {
7423 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7424 if (locsyms == NULL)
7425 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7426 symtab_hdr->sh_info,
7427 0, NULL, NULL, NULL);
7428 if (locsyms == NULL)
7429 return FALSE;
7430 *locsymsp = locsyms;
7431 }
7432 sym = locsyms + r_symndx;
7433
7434 if (hp != NULL)
7435 *hp = NULL;
7436
7437 if (symp != NULL)
7438 *symp = sym;
7439
7440 if (symsecp != NULL)
7441 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7442
7443 if (tls_maskp != NULL)
7444 {
7445 struct got_entry **lgot_ents;
7446 unsigned char *tls_mask;
7447
7448 tls_mask = NULL;
7449 lgot_ents = elf_local_got_ents (ibfd);
7450 if (lgot_ents != NULL)
7451 {
7452 struct plt_entry **local_plt = (struct plt_entry **)
7453 (lgot_ents + symtab_hdr->sh_info);
7454 unsigned char *lgot_masks = (unsigned char *)
7455 (local_plt + symtab_hdr->sh_info);
7456 tls_mask = &lgot_masks[r_symndx];
7457 }
7458 *tls_maskp = tls_mask;
7459 }
7460 }
7461 return TRUE;
7462 }
7463
7464 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7465 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7466 type suitable for optimization, and 1 otherwise. */
7467
7468 static int
7469 get_tls_mask (unsigned char **tls_maskp,
7470 unsigned long *toc_symndx,
7471 bfd_vma *toc_addend,
7472 Elf_Internal_Sym **locsymsp,
7473 const Elf_Internal_Rela *rel,
7474 bfd *ibfd)
7475 {
7476 unsigned long r_symndx;
7477 int next_r;
7478 struct elf_link_hash_entry *h;
7479 Elf_Internal_Sym *sym;
7480 asection *sec;
7481 bfd_vma off;
7482
7483 r_symndx = ELF64_R_SYM (rel->r_info);
7484 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7485 return 0;
7486
7487 if ((*tls_maskp != NULL && **tls_maskp != 0)
7488 || sec == NULL
7489 || ppc64_elf_section_data (sec) == NULL
7490 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7491 return 1;
7492
7493 /* Look inside a TOC section too. */
7494 if (h != NULL)
7495 {
7496 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7497 off = h->root.u.def.value;
7498 }
7499 else
7500 off = sym->st_value;
7501 off += rel->r_addend;
7502 BFD_ASSERT (off % 8 == 0);
7503 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7504 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7505 if (toc_symndx != NULL)
7506 *toc_symndx = r_symndx;
7507 if (toc_addend != NULL)
7508 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7509 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7510 return 0;
7511 if ((h == NULL || is_static_defined (h))
7512 && (next_r == -1 || next_r == -2))
7513 return 1 - next_r;
7514 return 1;
7515 }
7516
7517 /* Find (or create) an entry in the tocsave hash table. */
7518
7519 static struct tocsave_entry *
7520 tocsave_find (struct ppc_link_hash_table *htab,
7521 enum insert_option insert,
7522 Elf_Internal_Sym **local_syms,
7523 const Elf_Internal_Rela *irela,
7524 bfd *ibfd)
7525 {
7526 unsigned long r_indx;
7527 struct elf_link_hash_entry *h;
7528 Elf_Internal_Sym *sym;
7529 struct tocsave_entry ent, *p;
7530 hashval_t hash;
7531 struct tocsave_entry **slot;
7532
7533 r_indx = ELF64_R_SYM (irela->r_info);
7534 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7535 return NULL;
7536 if (ent.sec == NULL || ent.sec->output_section == NULL)
7537 {
7538 _bfd_error_handler
7539 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7540 return NULL;
7541 }
7542
7543 if (h != NULL)
7544 ent.offset = h->root.u.def.value;
7545 else
7546 ent.offset = sym->st_value;
7547 ent.offset += irela->r_addend;
7548
7549 hash = tocsave_htab_hash (&ent);
7550 slot = ((struct tocsave_entry **)
7551 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7552 if (slot == NULL)
7553 return NULL;
7554
7555 if (*slot == NULL)
7556 {
7557 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7558 if (p == NULL)
7559 return NULL;
7560 *p = ent;
7561 *slot = p;
7562 }
7563 return *slot;
7564 }
7565
7566 /* Adjust all global syms defined in opd sections. In gcc generated
7567 code for the old ABI, these will already have been done. */
7568
7569 static bfd_boolean
7570 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7571 {
7572 struct ppc_link_hash_entry *eh;
7573 asection *sym_sec;
7574 struct _opd_sec_data *opd;
7575
7576 if (h->root.type == bfd_link_hash_indirect)
7577 return TRUE;
7578
7579 if (h->root.type != bfd_link_hash_defined
7580 && h->root.type != bfd_link_hash_defweak)
7581 return TRUE;
7582
7583 eh = (struct ppc_link_hash_entry *) h;
7584 if (eh->adjust_done)
7585 return TRUE;
7586
7587 sym_sec = eh->elf.root.u.def.section;
7588 opd = get_opd_info (sym_sec);
7589 if (opd != NULL && opd->adjust != NULL)
7590 {
7591 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7592 if (adjust == -1)
7593 {
7594 /* This entry has been deleted. */
7595 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7596 if (dsec == NULL)
7597 {
7598 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7599 if (discarded_section (dsec))
7600 {
7601 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7602 break;
7603 }
7604 }
7605 eh->elf.root.u.def.value = 0;
7606 eh->elf.root.u.def.section = dsec;
7607 }
7608 else
7609 eh->elf.root.u.def.value += adjust;
7610 eh->adjust_done = 1;
7611 }
7612 return TRUE;
7613 }
7614
7615 /* Handles decrementing dynamic reloc counts for the reloc specified by
7616 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7617 have already been determined. */
7618
7619 static bfd_boolean
7620 dec_dynrel_count (bfd_vma r_info,
7621 asection *sec,
7622 struct bfd_link_info *info,
7623 Elf_Internal_Sym **local_syms,
7624 struct elf_link_hash_entry *h,
7625 Elf_Internal_Sym *sym)
7626 {
7627 enum elf_ppc64_reloc_type r_type;
7628 asection *sym_sec = NULL;
7629
7630 /* Can this reloc be dynamic? This switch, and later tests here
7631 should be kept in sync with the code in check_relocs. */
7632 r_type = ELF64_R_TYPE (r_info);
7633 switch (r_type)
7634 {
7635 default:
7636 return TRUE;
7637
7638 case R_PPC64_TPREL16:
7639 case R_PPC64_TPREL16_LO:
7640 case R_PPC64_TPREL16_HI:
7641 case R_PPC64_TPREL16_HA:
7642 case R_PPC64_TPREL16_DS:
7643 case R_PPC64_TPREL16_LO_DS:
7644 case R_PPC64_TPREL16_HIGH:
7645 case R_PPC64_TPREL16_HIGHA:
7646 case R_PPC64_TPREL16_HIGHER:
7647 case R_PPC64_TPREL16_HIGHERA:
7648 case R_PPC64_TPREL16_HIGHEST:
7649 case R_PPC64_TPREL16_HIGHESTA:
7650 case R_PPC64_TPREL64:
7651 case R_PPC64_DTPMOD64:
7652 case R_PPC64_DTPREL64:
7653 case R_PPC64_ADDR64:
7654 case R_PPC64_REL30:
7655 case R_PPC64_REL32:
7656 case R_PPC64_REL64:
7657 case R_PPC64_ADDR14:
7658 case R_PPC64_ADDR14_BRNTAKEN:
7659 case R_PPC64_ADDR14_BRTAKEN:
7660 case R_PPC64_ADDR16:
7661 case R_PPC64_ADDR16_DS:
7662 case R_PPC64_ADDR16_HA:
7663 case R_PPC64_ADDR16_HI:
7664 case R_PPC64_ADDR16_HIGH:
7665 case R_PPC64_ADDR16_HIGHA:
7666 case R_PPC64_ADDR16_HIGHER:
7667 case R_PPC64_ADDR16_HIGHERA:
7668 case R_PPC64_ADDR16_HIGHEST:
7669 case R_PPC64_ADDR16_HIGHESTA:
7670 case R_PPC64_ADDR16_LO:
7671 case R_PPC64_ADDR16_LO_DS:
7672 case R_PPC64_ADDR24:
7673 case R_PPC64_ADDR32:
7674 case R_PPC64_UADDR16:
7675 case R_PPC64_UADDR32:
7676 case R_PPC64_UADDR64:
7677 case R_PPC64_TOC:
7678 break;
7679 }
7680
7681 if (local_syms != NULL)
7682 {
7683 unsigned long r_symndx;
7684 bfd *ibfd = sec->owner;
7685
7686 r_symndx = ELF64_R_SYM (r_info);
7687 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7688 return FALSE;
7689 }
7690
7691 if ((bfd_link_pic (info)
7692 && (must_be_dyn_reloc (info, r_type)
7693 || (h != NULL
7694 && (!SYMBOLIC_BIND (info, h)
7695 || h->root.type == bfd_link_hash_defweak
7696 || !h->def_regular))))
7697 || (ELIMINATE_COPY_RELOCS
7698 && !bfd_link_pic (info)
7699 && h != NULL
7700 && (h->root.type == bfd_link_hash_defweak
7701 || !h->def_regular)))
7702 ;
7703 else
7704 return TRUE;
7705
7706 if (h != NULL)
7707 {
7708 struct elf_dyn_relocs *p;
7709 struct elf_dyn_relocs **pp;
7710 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7711
7712 /* elf_gc_sweep may have already removed all dyn relocs associated
7713 with local syms for a given section. Also, symbol flags are
7714 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7715 report a dynreloc miscount. */
7716 if (*pp == NULL && info->gc_sections)
7717 return TRUE;
7718
7719 while ((p = *pp) != NULL)
7720 {
7721 if (p->sec == sec)
7722 {
7723 if (!must_be_dyn_reloc (info, r_type))
7724 p->pc_count -= 1;
7725 p->count -= 1;
7726 if (p->count == 0)
7727 *pp = p->next;
7728 return TRUE;
7729 }
7730 pp = &p->next;
7731 }
7732 }
7733 else
7734 {
7735 struct ppc_dyn_relocs *p;
7736 struct ppc_dyn_relocs **pp;
7737 void *vpp;
7738 bfd_boolean is_ifunc;
7739
7740 if (local_syms == NULL)
7741 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7742 if (sym_sec == NULL)
7743 sym_sec = sec;
7744
7745 vpp = &elf_section_data (sym_sec)->local_dynrel;
7746 pp = (struct ppc_dyn_relocs **) vpp;
7747
7748 if (*pp == NULL && info->gc_sections)
7749 return TRUE;
7750
7751 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7752 while ((p = *pp) != NULL)
7753 {
7754 if (p->sec == sec && p->ifunc == is_ifunc)
7755 {
7756 p->count -= 1;
7757 if (p->count == 0)
7758 *pp = p->next;
7759 return TRUE;
7760 }
7761 pp = &p->next;
7762 }
7763 }
7764
7765 /* xgettext:c-format */
7766 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7767 sec->owner, sec);
7768 bfd_set_error (bfd_error_bad_value);
7769 return FALSE;
7770 }
7771
7772 /* Remove unused Official Procedure Descriptor entries. Currently we
7773 only remove those associated with functions in discarded link-once
7774 sections, or weakly defined functions that have been overridden. It
7775 would be possible to remove many more entries for statically linked
7776 applications. */
7777
7778 bfd_boolean
7779 ppc64_elf_edit_opd (struct bfd_link_info *info)
7780 {
7781 bfd *ibfd;
7782 bfd_boolean some_edited = FALSE;
7783 asection *need_pad = NULL;
7784 struct ppc_link_hash_table *htab;
7785
7786 htab = ppc_hash_table (info);
7787 if (htab == NULL)
7788 return FALSE;
7789
7790 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7791 {
7792 asection *sec;
7793 Elf_Internal_Rela *relstart, *rel, *relend;
7794 Elf_Internal_Shdr *symtab_hdr;
7795 Elf_Internal_Sym *local_syms;
7796 struct _opd_sec_data *opd;
7797 bfd_boolean need_edit, add_aux_fields, broken;
7798 bfd_size_type cnt_16b = 0;
7799
7800 if (!is_ppc64_elf (ibfd))
7801 continue;
7802
7803 sec = bfd_get_section_by_name (ibfd, ".opd");
7804 if (sec == NULL || sec->size == 0)
7805 continue;
7806
7807 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7808 continue;
7809
7810 if (sec->output_section == bfd_abs_section_ptr)
7811 continue;
7812
7813 /* Look through the section relocs. */
7814 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7815 continue;
7816
7817 local_syms = NULL;
7818 symtab_hdr = &elf_symtab_hdr (ibfd);
7819
7820 /* Read the relocations. */
7821 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7822 info->keep_memory);
7823 if (relstart == NULL)
7824 return FALSE;
7825
7826 /* First run through the relocs to check they are sane, and to
7827 determine whether we need to edit this opd section. */
7828 need_edit = FALSE;
7829 broken = FALSE;
7830 need_pad = sec;
7831 relend = relstart + sec->reloc_count;
7832 for (rel = relstart; rel < relend; )
7833 {
7834 enum elf_ppc64_reloc_type r_type;
7835 unsigned long r_symndx;
7836 asection *sym_sec;
7837 struct elf_link_hash_entry *h;
7838 Elf_Internal_Sym *sym;
7839 bfd_vma offset;
7840
7841 /* .opd contains an array of 16 or 24 byte entries. We're
7842 only interested in the reloc pointing to a function entry
7843 point. */
7844 offset = rel->r_offset;
7845 if (rel + 1 == relend
7846 || rel[1].r_offset != offset + 8)
7847 {
7848 /* If someone messes with .opd alignment then after a
7849 "ld -r" we might have padding in the middle of .opd.
7850 Also, there's nothing to prevent someone putting
7851 something silly in .opd with the assembler. No .opd
7852 optimization for them! */
7853 broken_opd:
7854 _bfd_error_handler
7855 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7856 broken = TRUE;
7857 break;
7858 }
7859
7860 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7861 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7862 {
7863 _bfd_error_handler
7864 /* xgettext:c-format */
7865 (_("%B: unexpected reloc type %u in .opd section"),
7866 ibfd, r_type);
7867 broken = TRUE;
7868 break;
7869 }
7870
7871 r_symndx = ELF64_R_SYM (rel->r_info);
7872 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7873 r_symndx, ibfd))
7874 goto error_ret;
7875
7876 if (sym_sec == NULL || sym_sec->owner == NULL)
7877 {
7878 const char *sym_name;
7879 if (h != NULL)
7880 sym_name = h->root.root.string;
7881 else
7882 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7883 sym_sec);
7884
7885 _bfd_error_handler
7886 /* xgettext:c-format */
7887 (_("%B: undefined sym `%s' in .opd section"),
7888 ibfd, sym_name);
7889 broken = TRUE;
7890 break;
7891 }
7892
7893 /* opd entries are always for functions defined in the
7894 current input bfd. If the symbol isn't defined in the
7895 input bfd, then we won't be using the function in this
7896 bfd; It must be defined in a linkonce section in another
7897 bfd, or is weak. It's also possible that we are
7898 discarding the function due to a linker script /DISCARD/,
7899 which we test for via the output_section. */
7900 if (sym_sec->owner != ibfd
7901 || sym_sec->output_section == bfd_abs_section_ptr)
7902 need_edit = TRUE;
7903
7904 rel += 2;
7905 if (rel + 1 == relend
7906 || (rel + 2 < relend
7907 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7908 ++rel;
7909
7910 if (rel == relend)
7911 {
7912 if (sec->size == offset + 24)
7913 {
7914 need_pad = NULL;
7915 break;
7916 }
7917 if (sec->size == offset + 16)
7918 {
7919 cnt_16b++;
7920 break;
7921 }
7922 goto broken_opd;
7923 }
7924 else if (rel + 1 < relend
7925 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7926 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7927 {
7928 if (rel[0].r_offset == offset + 16)
7929 cnt_16b++;
7930 else if (rel[0].r_offset != offset + 24)
7931 goto broken_opd;
7932 }
7933 else
7934 goto broken_opd;
7935 }
7936
7937 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7938
7939 if (!broken && (need_edit || add_aux_fields))
7940 {
7941 Elf_Internal_Rela *write_rel;
7942 Elf_Internal_Shdr *rel_hdr;
7943 bfd_byte *rptr, *wptr;
7944 bfd_byte *new_contents;
7945 bfd_size_type amt;
7946
7947 new_contents = NULL;
7948 amt = OPD_NDX (sec->size) * sizeof (long);
7949 opd = &ppc64_elf_section_data (sec)->u.opd;
7950 opd->adjust = bfd_zalloc (sec->owner, amt);
7951 if (opd->adjust == NULL)
7952 return FALSE;
7953
7954 /* This seems a waste of time as input .opd sections are all
7955 zeros as generated by gcc, but I suppose there's no reason
7956 this will always be so. We might start putting something in
7957 the third word of .opd entries. */
7958 if ((sec->flags & SEC_IN_MEMORY) == 0)
7959 {
7960 bfd_byte *loc;
7961 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7962 {
7963 if (loc != NULL)
7964 free (loc);
7965 error_ret:
7966 if (local_syms != NULL
7967 && symtab_hdr->contents != (unsigned char *) local_syms)
7968 free (local_syms);
7969 if (elf_section_data (sec)->relocs != relstart)
7970 free (relstart);
7971 return FALSE;
7972 }
7973 sec->contents = loc;
7974 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7975 }
7976
7977 elf_section_data (sec)->relocs = relstart;
7978
7979 new_contents = sec->contents;
7980 if (add_aux_fields)
7981 {
7982 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7983 if (new_contents == NULL)
7984 return FALSE;
7985 need_pad = NULL;
7986 }
7987 wptr = new_contents;
7988 rptr = sec->contents;
7989 write_rel = relstart;
7990 for (rel = relstart; rel < relend; )
7991 {
7992 unsigned long r_symndx;
7993 asection *sym_sec;
7994 struct elf_link_hash_entry *h;
7995 struct ppc_link_hash_entry *fdh = NULL;
7996 Elf_Internal_Sym *sym;
7997 long opd_ent_size;
7998 Elf_Internal_Rela *next_rel;
7999 bfd_boolean skip;
8000
8001 r_symndx = ELF64_R_SYM (rel->r_info);
8002 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8003 r_symndx, ibfd))
8004 goto error_ret;
8005
8006 next_rel = rel + 2;
8007 if (next_rel + 1 == relend
8008 || (next_rel + 2 < relend
8009 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8010 ++next_rel;
8011
8012 /* See if the .opd entry is full 24 byte or
8013 16 byte (with fd_aux entry overlapped with next
8014 fd_func). */
8015 opd_ent_size = 24;
8016 if (next_rel == relend)
8017 {
8018 if (sec->size == rel->r_offset + 16)
8019 opd_ent_size = 16;
8020 }
8021 else if (next_rel->r_offset == rel->r_offset + 16)
8022 opd_ent_size = 16;
8023
8024 if (h != NULL
8025 && h->root.root.string[0] == '.')
8026 {
8027 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8028 if (fdh != NULL)
8029 {
8030 fdh = ppc_follow_link (fdh);
8031 if (fdh->elf.root.type != bfd_link_hash_defined
8032 && fdh->elf.root.type != bfd_link_hash_defweak)
8033 fdh = NULL;
8034 }
8035 }
8036
8037 skip = (sym_sec->owner != ibfd
8038 || sym_sec->output_section == bfd_abs_section_ptr);
8039 if (skip)
8040 {
8041 if (fdh != NULL && sym_sec->owner == ibfd)
8042 {
8043 /* Arrange for the function descriptor sym
8044 to be dropped. */
8045 fdh->elf.root.u.def.value = 0;
8046 fdh->elf.root.u.def.section = sym_sec;
8047 }
8048 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8049
8050 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8051 rel = next_rel;
8052 else
8053 while (1)
8054 {
8055 if (!dec_dynrel_count (rel->r_info, sec, info,
8056 NULL, h, sym))
8057 goto error_ret;
8058
8059 if (++rel == next_rel)
8060 break;
8061
8062 r_symndx = ELF64_R_SYM (rel->r_info);
8063 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8064 r_symndx, ibfd))
8065 goto error_ret;
8066 }
8067 }
8068 else
8069 {
8070 /* We'll be keeping this opd entry. */
8071 long adjust;
8072
8073 if (fdh != NULL)
8074 {
8075 /* Redefine the function descriptor symbol to
8076 this location in the opd section. It is
8077 necessary to update the value here rather
8078 than using an array of adjustments as we do
8079 for local symbols, because various places
8080 in the generic ELF code use the value
8081 stored in u.def.value. */
8082 fdh->elf.root.u.def.value = wptr - new_contents;
8083 fdh->adjust_done = 1;
8084 }
8085
8086 /* Local syms are a bit tricky. We could
8087 tweak them as they can be cached, but
8088 we'd need to look through the local syms
8089 for the function descriptor sym which we
8090 don't have at the moment. So keep an
8091 array of adjustments. */
8092 adjust = (wptr - new_contents) - (rptr - sec->contents);
8093 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8094
8095 if (wptr != rptr)
8096 memcpy (wptr, rptr, opd_ent_size);
8097 wptr += opd_ent_size;
8098 if (add_aux_fields && opd_ent_size == 16)
8099 {
8100 memset (wptr, '\0', 8);
8101 wptr += 8;
8102 }
8103
8104 /* We need to adjust any reloc offsets to point to the
8105 new opd entries. */
8106 for ( ; rel != next_rel; ++rel)
8107 {
8108 rel->r_offset += adjust;
8109 if (write_rel != rel)
8110 memcpy (write_rel, rel, sizeof (*rel));
8111 ++write_rel;
8112 }
8113 }
8114
8115 rptr += opd_ent_size;
8116 }
8117
8118 sec->size = wptr - new_contents;
8119 sec->reloc_count = write_rel - relstart;
8120 if (add_aux_fields)
8121 {
8122 free (sec->contents);
8123 sec->contents = new_contents;
8124 }
8125
8126 /* Fudge the header size too, as this is used later in
8127 elf_bfd_final_link if we are emitting relocs. */
8128 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8129 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8130 some_edited = TRUE;
8131 }
8132 else if (elf_section_data (sec)->relocs != relstart)
8133 free (relstart);
8134
8135 if (local_syms != NULL
8136 && symtab_hdr->contents != (unsigned char *) local_syms)
8137 {
8138 if (!info->keep_memory)
8139 free (local_syms);
8140 else
8141 symtab_hdr->contents = (unsigned char *) local_syms;
8142 }
8143 }
8144
8145 if (some_edited)
8146 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8147
8148 /* If we are doing a final link and the last .opd entry is just 16 byte
8149 long, add a 8 byte padding after it. */
8150 if (need_pad != NULL && !bfd_link_relocatable (info))
8151 {
8152 bfd_byte *p;
8153
8154 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8155 {
8156 BFD_ASSERT (need_pad->size > 0);
8157
8158 p = bfd_malloc (need_pad->size + 8);
8159 if (p == NULL)
8160 return FALSE;
8161
8162 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8163 p, 0, need_pad->size))
8164 return FALSE;
8165
8166 need_pad->contents = p;
8167 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8168 }
8169 else
8170 {
8171 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8172 if (p == NULL)
8173 return FALSE;
8174
8175 need_pad->contents = p;
8176 }
8177
8178 memset (need_pad->contents + need_pad->size, 0, 8);
8179 need_pad->size += 8;
8180 }
8181
8182 return TRUE;
8183 }
8184
8185 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8186
8187 asection *
8188 ppc64_elf_tls_setup (struct bfd_link_info *info)
8189 {
8190 struct ppc_link_hash_table *htab;
8191
8192 htab = ppc_hash_table (info);
8193 if (htab == NULL)
8194 return NULL;
8195
8196 if (abiversion (info->output_bfd) == 1)
8197 htab->opd_abi = 1;
8198
8199 if (htab->params->no_multi_toc)
8200 htab->do_multi_toc = 0;
8201 else if (!htab->do_multi_toc)
8202 htab->params->no_multi_toc = 1;
8203
8204 /* Default to --no-plt-localentry, as this option can cause problems
8205 with symbol interposition. For example, glibc libpthread.so and
8206 libc.so duplicate many pthread symbols, with a fallback
8207 implementation in libc.so. In some cases the fallback does more
8208 work than the pthread implementation. __pthread_condattr_destroy
8209 is one such symbol: the libpthread.so implementation is
8210 localentry:0 while the libc.so implementation is localentry:8.
8211 An app that "cleverly" uses dlopen to only load necessary
8212 libraries at runtime may omit loading libpthread.so when not
8213 running multi-threaded, which then results in the libc.so
8214 fallback symbols being used and ld.so complaining. Now there
8215 are workarounds in ld (see non_zero_localentry) to detect the
8216 pthread situation, but that may not be the only case where
8217 --plt-localentry can cause trouble. */
8218 if (htab->params->plt_localentry0 < 0)
8219 htab->params->plt_localentry0 = 0;
8220 if (htab->params->plt_localentry0
8221 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8222 FALSE, FALSE, FALSE) == NULL)
8223 info->callbacks->einfo
8224 (_("%P: warning: --plt-localentry is especially dangerous without "
8225 "ld.so support to detect ABI violations.\n"));
8226
8227 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8228 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8229 FALSE, FALSE, TRUE));
8230 /* Move dynamic linking info to the function descriptor sym. */
8231 if (htab->tls_get_addr != NULL)
8232 func_desc_adjust (&htab->tls_get_addr->elf, info);
8233 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8234 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8235 FALSE, FALSE, TRUE));
8236 if (htab->params->tls_get_addr_opt)
8237 {
8238 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8239
8240 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8241 FALSE, FALSE, TRUE);
8242 if (opt != NULL)
8243 func_desc_adjust (opt, info);
8244 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8245 FALSE, FALSE, TRUE);
8246 if (opt_fd != NULL
8247 && (opt_fd->root.type == bfd_link_hash_defined
8248 || opt_fd->root.type == bfd_link_hash_defweak))
8249 {
8250 /* If glibc supports an optimized __tls_get_addr call stub,
8251 signalled by the presence of __tls_get_addr_opt, and we'll
8252 be calling __tls_get_addr via a plt call stub, then
8253 make __tls_get_addr point to __tls_get_addr_opt. */
8254 tga_fd = &htab->tls_get_addr_fd->elf;
8255 if (htab->elf.dynamic_sections_created
8256 && tga_fd != NULL
8257 && (tga_fd->type == STT_FUNC
8258 || tga_fd->needs_plt)
8259 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8260 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8261 {
8262 struct plt_entry *ent;
8263
8264 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8265 if (ent->plt.refcount > 0)
8266 break;
8267 if (ent != NULL)
8268 {
8269 tga_fd->root.type = bfd_link_hash_indirect;
8270 tga_fd->root.u.i.link = &opt_fd->root;
8271 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8272 opt_fd->mark = 1;
8273 if (opt_fd->dynindx != -1)
8274 {
8275 /* Use __tls_get_addr_opt in dynamic relocations. */
8276 opt_fd->dynindx = -1;
8277 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8278 opt_fd->dynstr_index);
8279 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8280 return NULL;
8281 }
8282 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8283 tga = &htab->tls_get_addr->elf;
8284 if (opt != NULL && tga != NULL)
8285 {
8286 tga->root.type = bfd_link_hash_indirect;
8287 tga->root.u.i.link = &opt->root;
8288 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8289 opt->mark = 1;
8290 _bfd_elf_link_hash_hide_symbol (info, opt,
8291 tga->forced_local);
8292 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8293 }
8294 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8295 htab->tls_get_addr_fd->is_func_descriptor = 1;
8296 if (htab->tls_get_addr != NULL)
8297 {
8298 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8299 htab->tls_get_addr->is_func = 1;
8300 }
8301 }
8302 }
8303 }
8304 else if (htab->params->tls_get_addr_opt < 0)
8305 htab->params->tls_get_addr_opt = 0;
8306 }
8307 return _bfd_elf_tls_setup (info->output_bfd, info);
8308 }
8309
8310 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8311 HASH1 or HASH2. */
8312
8313 static bfd_boolean
8314 branch_reloc_hash_match (const bfd *ibfd,
8315 const Elf_Internal_Rela *rel,
8316 const struct ppc_link_hash_entry *hash1,
8317 const struct ppc_link_hash_entry *hash2)
8318 {
8319 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8320 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8321 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8322
8323 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8324 {
8325 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8326 struct elf_link_hash_entry *h;
8327
8328 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8329 h = elf_follow_link (h);
8330 if (h == &hash1->elf || h == &hash2->elf)
8331 return TRUE;
8332 }
8333 return FALSE;
8334 }
8335
8336 /* Run through all the TLS relocs looking for optimization
8337 opportunities. The linker has been hacked (see ppc64elf.em) to do
8338 a preliminary section layout so that we know the TLS segment
8339 offsets. We can't optimize earlier because some optimizations need
8340 to know the tp offset, and we need to optimize before allocating
8341 dynamic relocations. */
8342
8343 bfd_boolean
8344 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8345 {
8346 bfd *ibfd;
8347 asection *sec;
8348 struct ppc_link_hash_table *htab;
8349 unsigned char *toc_ref;
8350 int pass;
8351
8352 if (!bfd_link_executable (info))
8353 return TRUE;
8354
8355 htab = ppc_hash_table (info);
8356 if (htab == NULL)
8357 return FALSE;
8358
8359 /* Make two passes over the relocs. On the first pass, mark toc
8360 entries involved with tls relocs, and check that tls relocs
8361 involved in setting up a tls_get_addr call are indeed followed by
8362 such a call. If they are not, we can't do any tls optimization.
8363 On the second pass twiddle tls_mask flags to notify
8364 relocate_section that optimization can be done, and adjust got
8365 and plt refcounts. */
8366 toc_ref = NULL;
8367 for (pass = 0; pass < 2; ++pass)
8368 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8369 {
8370 Elf_Internal_Sym *locsyms = NULL;
8371 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8372
8373 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8374 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8375 {
8376 Elf_Internal_Rela *relstart, *rel, *relend;
8377 bfd_boolean found_tls_get_addr_arg = 0;
8378
8379 /* Read the relocations. */
8380 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8381 info->keep_memory);
8382 if (relstart == NULL)
8383 {
8384 free (toc_ref);
8385 return FALSE;
8386 }
8387
8388 relend = relstart + sec->reloc_count;
8389 for (rel = relstart; rel < relend; rel++)
8390 {
8391 enum elf_ppc64_reloc_type r_type;
8392 unsigned long r_symndx;
8393 struct elf_link_hash_entry *h;
8394 Elf_Internal_Sym *sym;
8395 asection *sym_sec;
8396 unsigned char *tls_mask;
8397 unsigned char tls_set, tls_clear, tls_type = 0;
8398 bfd_vma value;
8399 bfd_boolean ok_tprel, is_local;
8400 long toc_ref_index = 0;
8401 int expecting_tls_get_addr = 0;
8402 bfd_boolean ret = FALSE;
8403
8404 r_symndx = ELF64_R_SYM (rel->r_info);
8405 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8406 r_symndx, ibfd))
8407 {
8408 err_free_rel:
8409 if (elf_section_data (sec)->relocs != relstart)
8410 free (relstart);
8411 if (toc_ref != NULL)
8412 free (toc_ref);
8413 if (locsyms != NULL
8414 && (elf_symtab_hdr (ibfd).contents
8415 != (unsigned char *) locsyms))
8416 free (locsyms);
8417 return ret;
8418 }
8419
8420 if (h != NULL)
8421 {
8422 if (h->root.type == bfd_link_hash_defined
8423 || h->root.type == bfd_link_hash_defweak)
8424 value = h->root.u.def.value;
8425 else if (h->root.type == bfd_link_hash_undefweak)
8426 value = 0;
8427 else
8428 {
8429 found_tls_get_addr_arg = 0;
8430 continue;
8431 }
8432 }
8433 else
8434 /* Symbols referenced by TLS relocs must be of type
8435 STT_TLS. So no need for .opd local sym adjust. */
8436 value = sym->st_value;
8437
8438 ok_tprel = FALSE;
8439 is_local = FALSE;
8440 if (h == NULL
8441 || !h->def_dynamic)
8442 {
8443 is_local = TRUE;
8444 if (h != NULL
8445 && h->root.type == bfd_link_hash_undefweak)
8446 ok_tprel = TRUE;
8447 else if (sym_sec != NULL
8448 && sym_sec->output_section != NULL)
8449 {
8450 value += sym_sec->output_offset;
8451 value += sym_sec->output_section->vma;
8452 value -= htab->elf.tls_sec->vma;
8453 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8454 < (bfd_vma) 1 << 32);
8455 }
8456 }
8457
8458 r_type = ELF64_R_TYPE (rel->r_info);
8459 /* If this section has old-style __tls_get_addr calls
8460 without marker relocs, then check that each
8461 __tls_get_addr call reloc is preceded by a reloc
8462 that conceivably belongs to the __tls_get_addr arg
8463 setup insn. If we don't find matching arg setup
8464 relocs, don't do any tls optimization. */
8465 if (pass == 0
8466 && sec->has_tls_get_addr_call
8467 && h != NULL
8468 && (h == &htab->tls_get_addr->elf
8469 || h == &htab->tls_get_addr_fd->elf)
8470 && !found_tls_get_addr_arg
8471 && is_branch_reloc (r_type))
8472 {
8473 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8474 "TLS optimization disabled\n"),
8475 ibfd, sec, rel->r_offset);
8476 ret = TRUE;
8477 goto err_free_rel;
8478 }
8479
8480 found_tls_get_addr_arg = 0;
8481 switch (r_type)
8482 {
8483 case R_PPC64_GOT_TLSLD16:
8484 case R_PPC64_GOT_TLSLD16_LO:
8485 expecting_tls_get_addr = 1;
8486 found_tls_get_addr_arg = 1;
8487 /* Fall through. */
8488
8489 case R_PPC64_GOT_TLSLD16_HI:
8490 case R_PPC64_GOT_TLSLD16_HA:
8491 /* These relocs should never be against a symbol
8492 defined in a shared lib. Leave them alone if
8493 that turns out to be the case. */
8494 if (!is_local)
8495 continue;
8496
8497 /* LD -> LE */
8498 tls_set = 0;
8499 tls_clear = TLS_LD;
8500 tls_type = TLS_TLS | TLS_LD;
8501 break;
8502
8503 case R_PPC64_GOT_TLSGD16:
8504 case R_PPC64_GOT_TLSGD16_LO:
8505 expecting_tls_get_addr = 1;
8506 found_tls_get_addr_arg = 1;
8507 /* Fall through. */
8508
8509 case R_PPC64_GOT_TLSGD16_HI:
8510 case R_PPC64_GOT_TLSGD16_HA:
8511 if (ok_tprel)
8512 /* GD -> LE */
8513 tls_set = 0;
8514 else
8515 /* GD -> IE */
8516 tls_set = TLS_TLS | TLS_TPRELGD;
8517 tls_clear = TLS_GD;
8518 tls_type = TLS_TLS | TLS_GD;
8519 break;
8520
8521 case R_PPC64_GOT_TPREL16_DS:
8522 case R_PPC64_GOT_TPREL16_LO_DS:
8523 case R_PPC64_GOT_TPREL16_HI:
8524 case R_PPC64_GOT_TPREL16_HA:
8525 if (ok_tprel)
8526 {
8527 /* IE -> LE */
8528 tls_set = 0;
8529 tls_clear = TLS_TPREL;
8530 tls_type = TLS_TLS | TLS_TPREL;
8531 break;
8532 }
8533 continue;
8534
8535 case R_PPC64_TLSGD:
8536 case R_PPC64_TLSLD:
8537 found_tls_get_addr_arg = 1;
8538 /* Fall through. */
8539
8540 case R_PPC64_TLS:
8541 case R_PPC64_TOC16:
8542 case R_PPC64_TOC16_LO:
8543 if (sym_sec == NULL || sym_sec != toc)
8544 continue;
8545
8546 /* Mark this toc entry as referenced by a TLS
8547 code sequence. We can do that now in the
8548 case of R_PPC64_TLS, and after checking for
8549 tls_get_addr for the TOC16 relocs. */
8550 if (toc_ref == NULL)
8551 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8552 if (toc_ref == NULL)
8553 goto err_free_rel;
8554
8555 if (h != NULL)
8556 value = h->root.u.def.value;
8557 else
8558 value = sym->st_value;
8559 value += rel->r_addend;
8560 if (value % 8 != 0)
8561 continue;
8562 BFD_ASSERT (value < toc->size
8563 && toc->output_offset % 8 == 0);
8564 toc_ref_index = (value + toc->output_offset) / 8;
8565 if (r_type == R_PPC64_TLS
8566 || r_type == R_PPC64_TLSGD
8567 || r_type == R_PPC64_TLSLD)
8568 {
8569 toc_ref[toc_ref_index] = 1;
8570 continue;
8571 }
8572
8573 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8574 continue;
8575
8576 tls_set = 0;
8577 tls_clear = 0;
8578 expecting_tls_get_addr = 2;
8579 break;
8580
8581 case R_PPC64_TPREL64:
8582 if (pass == 0
8583 || sec != toc
8584 || toc_ref == NULL
8585 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8586 continue;
8587 if (ok_tprel)
8588 {
8589 /* IE -> LE */
8590 tls_set = TLS_EXPLICIT;
8591 tls_clear = TLS_TPREL;
8592 break;
8593 }
8594 continue;
8595
8596 case R_PPC64_DTPMOD64:
8597 if (pass == 0
8598 || sec != toc
8599 || toc_ref == NULL
8600 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8601 continue;
8602 if (rel + 1 < relend
8603 && (rel[1].r_info
8604 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8605 && rel[1].r_offset == rel->r_offset + 8)
8606 {
8607 if (ok_tprel)
8608 /* GD -> LE */
8609 tls_set = TLS_EXPLICIT | TLS_GD;
8610 else
8611 /* GD -> IE */
8612 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8613 tls_clear = TLS_GD;
8614 }
8615 else
8616 {
8617 if (!is_local)
8618 continue;
8619
8620 /* LD -> LE */
8621 tls_set = TLS_EXPLICIT;
8622 tls_clear = TLS_LD;
8623 }
8624 break;
8625
8626 default:
8627 continue;
8628 }
8629
8630 if (pass == 0)
8631 {
8632 if (!expecting_tls_get_addr
8633 || !sec->has_tls_get_addr_call)
8634 continue;
8635
8636 if (rel + 1 < relend
8637 && branch_reloc_hash_match (ibfd, rel + 1,
8638 htab->tls_get_addr,
8639 htab->tls_get_addr_fd))
8640 {
8641 if (expecting_tls_get_addr == 2)
8642 {
8643 /* Check for toc tls entries. */
8644 unsigned char *toc_tls;
8645 int retval;
8646
8647 retval = get_tls_mask (&toc_tls, NULL, NULL,
8648 &locsyms,
8649 rel, ibfd);
8650 if (retval == 0)
8651 goto err_free_rel;
8652 if (toc_tls != NULL)
8653 {
8654 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8655 found_tls_get_addr_arg = 1;
8656 if (retval > 1)
8657 toc_ref[toc_ref_index] = 1;
8658 }
8659 }
8660 continue;
8661 }
8662
8663 if (expecting_tls_get_addr != 1)
8664 continue;
8665
8666 /* Uh oh, we didn't find the expected call. We
8667 could just mark this symbol to exclude it
8668 from tls optimization but it's safer to skip
8669 the entire optimization. */
8670 /* xgettext:c-format */
8671 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8672 "TLS optimization disabled\n"),
8673 ibfd, sec, rel->r_offset);
8674 ret = TRUE;
8675 goto err_free_rel;
8676 }
8677
8678 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8679 {
8680 struct plt_entry *ent;
8681 for (ent = htab->tls_get_addr->elf.plt.plist;
8682 ent != NULL;
8683 ent = ent->next)
8684 if (ent->addend == 0)
8685 {
8686 if (ent->plt.refcount > 0)
8687 {
8688 ent->plt.refcount -= 1;
8689 expecting_tls_get_addr = 0;
8690 }
8691 break;
8692 }
8693 }
8694
8695 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8696 {
8697 struct plt_entry *ent;
8698 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8699 ent != NULL;
8700 ent = ent->next)
8701 if (ent->addend == 0)
8702 {
8703 if (ent->plt.refcount > 0)
8704 ent->plt.refcount -= 1;
8705 break;
8706 }
8707 }
8708
8709 if (tls_clear == 0)
8710 continue;
8711
8712 if ((tls_set & TLS_EXPLICIT) == 0)
8713 {
8714 struct got_entry *ent;
8715
8716 /* Adjust got entry for this reloc. */
8717 if (h != NULL)
8718 ent = h->got.glist;
8719 else
8720 ent = elf_local_got_ents (ibfd)[r_symndx];
8721
8722 for (; ent != NULL; ent = ent->next)
8723 if (ent->addend == rel->r_addend
8724 && ent->owner == ibfd
8725 && ent->tls_type == tls_type)
8726 break;
8727 if (ent == NULL)
8728 abort ();
8729
8730 if (tls_set == 0)
8731 {
8732 /* We managed to get rid of a got entry. */
8733 if (ent->got.refcount > 0)
8734 ent->got.refcount -= 1;
8735 }
8736 }
8737 else
8738 {
8739 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8740 we'll lose one or two dyn relocs. */
8741 if (!dec_dynrel_count (rel->r_info, sec, info,
8742 NULL, h, sym))
8743 return FALSE;
8744
8745 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8746 {
8747 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8748 NULL, h, sym))
8749 return FALSE;
8750 }
8751 }
8752
8753 *tls_mask |= tls_set;
8754 *tls_mask &= ~tls_clear;
8755 }
8756
8757 if (elf_section_data (sec)->relocs != relstart)
8758 free (relstart);
8759 }
8760
8761 if (locsyms != NULL
8762 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8763 {
8764 if (!info->keep_memory)
8765 free (locsyms);
8766 else
8767 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8768 }
8769 }
8770
8771 if (toc_ref != NULL)
8772 free (toc_ref);
8773 htab->do_tls_opt = 1;
8774 return TRUE;
8775 }
8776
8777 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8778 the values of any global symbols in a toc section that has been
8779 edited. Globals in toc sections should be a rarity, so this function
8780 sets a flag if any are found in toc sections other than the one just
8781 edited, so that further hash table traversals can be avoided. */
8782
8783 struct adjust_toc_info
8784 {
8785 asection *toc;
8786 unsigned long *skip;
8787 bfd_boolean global_toc_syms;
8788 };
8789
8790 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8791
8792 static bfd_boolean
8793 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8794 {
8795 struct ppc_link_hash_entry *eh;
8796 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8797 unsigned long i;
8798
8799 if (h->root.type != bfd_link_hash_defined
8800 && h->root.type != bfd_link_hash_defweak)
8801 return TRUE;
8802
8803 eh = (struct ppc_link_hash_entry *) h;
8804 if (eh->adjust_done)
8805 return TRUE;
8806
8807 if (eh->elf.root.u.def.section == toc_inf->toc)
8808 {
8809 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8810 i = toc_inf->toc->rawsize >> 3;
8811 else
8812 i = eh->elf.root.u.def.value >> 3;
8813
8814 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8815 {
8816 _bfd_error_handler
8817 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8818 do
8819 ++i;
8820 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8821 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8822 }
8823
8824 eh->elf.root.u.def.value -= toc_inf->skip[i];
8825 eh->adjust_done = 1;
8826 }
8827 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8828 toc_inf->global_toc_syms = TRUE;
8829
8830 return TRUE;
8831 }
8832
8833 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8834 on a _LO variety toc/got reloc. */
8835
8836 static bfd_boolean
8837 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8838 {
8839 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8840 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8841 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8842 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8843 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8844 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8845 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8846 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8847 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8848 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8849 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8850 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8851 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8852 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8853 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8854 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8855 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8856 /* Exclude lfqu by testing reloc. If relocs are ever
8857 defined for the reduced D field in psq_lu then those
8858 will need testing too. */
8859 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8860 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8861 && (insn & 1) == 0)
8862 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8863 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8864 /* Exclude stfqu. psq_stu as above for psq_lu. */
8865 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8866 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8867 && (insn & 1) == 0));
8868 }
8869
8870 /* Examine all relocs referencing .toc sections in order to remove
8871 unused .toc entries. */
8872
8873 bfd_boolean
8874 ppc64_elf_edit_toc (struct bfd_link_info *info)
8875 {
8876 bfd *ibfd;
8877 struct adjust_toc_info toc_inf;
8878 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8879
8880 htab->do_toc_opt = 1;
8881 toc_inf.global_toc_syms = TRUE;
8882 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8883 {
8884 asection *toc, *sec;
8885 Elf_Internal_Shdr *symtab_hdr;
8886 Elf_Internal_Sym *local_syms;
8887 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8888 unsigned long *skip, *drop;
8889 unsigned char *used;
8890 unsigned char *keep, last, some_unused;
8891
8892 if (!is_ppc64_elf (ibfd))
8893 continue;
8894
8895 toc = bfd_get_section_by_name (ibfd, ".toc");
8896 if (toc == NULL
8897 || toc->size == 0
8898 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8899 || discarded_section (toc))
8900 continue;
8901
8902 toc_relocs = NULL;
8903 local_syms = NULL;
8904 symtab_hdr = &elf_symtab_hdr (ibfd);
8905
8906 /* Look at sections dropped from the final link. */
8907 skip = NULL;
8908 relstart = NULL;
8909 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8910 {
8911 if (sec->reloc_count == 0
8912 || !discarded_section (sec)
8913 || get_opd_info (sec)
8914 || (sec->flags & SEC_ALLOC) == 0
8915 || (sec->flags & SEC_DEBUGGING) != 0)
8916 continue;
8917
8918 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8919 if (relstart == NULL)
8920 goto error_ret;
8921
8922 /* Run through the relocs to see which toc entries might be
8923 unused. */
8924 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8925 {
8926 enum elf_ppc64_reloc_type r_type;
8927 unsigned long r_symndx;
8928 asection *sym_sec;
8929 struct elf_link_hash_entry *h;
8930 Elf_Internal_Sym *sym;
8931 bfd_vma val;
8932
8933 r_type = ELF64_R_TYPE (rel->r_info);
8934 switch (r_type)
8935 {
8936 default:
8937 continue;
8938
8939 case R_PPC64_TOC16:
8940 case R_PPC64_TOC16_LO:
8941 case R_PPC64_TOC16_HI:
8942 case R_PPC64_TOC16_HA:
8943 case R_PPC64_TOC16_DS:
8944 case R_PPC64_TOC16_LO_DS:
8945 break;
8946 }
8947
8948 r_symndx = ELF64_R_SYM (rel->r_info);
8949 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8950 r_symndx, ibfd))
8951 goto error_ret;
8952
8953 if (sym_sec != toc)
8954 continue;
8955
8956 if (h != NULL)
8957 val = h->root.u.def.value;
8958 else
8959 val = sym->st_value;
8960 val += rel->r_addend;
8961
8962 if (val >= toc->size)
8963 continue;
8964
8965 /* Anything in the toc ought to be aligned to 8 bytes.
8966 If not, don't mark as unused. */
8967 if (val & 7)
8968 continue;
8969
8970 if (skip == NULL)
8971 {
8972 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8973 if (skip == NULL)
8974 goto error_ret;
8975 }
8976
8977 skip[val >> 3] = ref_from_discarded;
8978 }
8979
8980 if (elf_section_data (sec)->relocs != relstart)
8981 free (relstart);
8982 }
8983
8984 /* For largetoc loads of address constants, we can convert
8985 . addis rx,2,addr@got@ha
8986 . ld ry,addr@got@l(rx)
8987 to
8988 . addis rx,2,addr@toc@ha
8989 . addi ry,rx,addr@toc@l
8990 when addr is within 2G of the toc pointer. This then means
8991 that the word storing "addr" in the toc is no longer needed. */
8992
8993 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8994 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8995 && toc->reloc_count != 0)
8996 {
8997 /* Read toc relocs. */
8998 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8999 info->keep_memory);
9000 if (toc_relocs == NULL)
9001 goto error_ret;
9002
9003 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9004 {
9005 enum elf_ppc64_reloc_type r_type;
9006 unsigned long r_symndx;
9007 asection *sym_sec;
9008 struct elf_link_hash_entry *h;
9009 Elf_Internal_Sym *sym;
9010 bfd_vma val, addr;
9011
9012 r_type = ELF64_R_TYPE (rel->r_info);
9013 if (r_type != R_PPC64_ADDR64)
9014 continue;
9015
9016 r_symndx = ELF64_R_SYM (rel->r_info);
9017 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9018 r_symndx, ibfd))
9019 goto error_ret;
9020
9021 if (sym_sec == NULL
9022 || sym_sec->output_section == NULL
9023 || discarded_section (sym_sec))
9024 continue;
9025
9026 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9027 continue;
9028
9029 if (h != NULL)
9030 {
9031 if (h->type == STT_GNU_IFUNC)
9032 continue;
9033 val = h->root.u.def.value;
9034 }
9035 else
9036 {
9037 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9038 continue;
9039 val = sym->st_value;
9040 }
9041 val += rel->r_addend;
9042 val += sym_sec->output_section->vma + sym_sec->output_offset;
9043
9044 /* We don't yet know the exact toc pointer value, but we
9045 know it will be somewhere in the toc section. Don't
9046 optimize if the difference from any possible toc
9047 pointer is outside [ff..f80008000, 7fff7fff]. */
9048 addr = toc->output_section->vma + TOC_BASE_OFF;
9049 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9050 continue;
9051
9052 addr = toc->output_section->vma + toc->output_section->rawsize;
9053 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9054 continue;
9055
9056 if (skip == NULL)
9057 {
9058 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9059 if (skip == NULL)
9060 goto error_ret;
9061 }
9062
9063 skip[rel->r_offset >> 3]
9064 |= can_optimize | ((rel - toc_relocs) << 2);
9065 }
9066 }
9067
9068 if (skip == NULL)
9069 continue;
9070
9071 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9072 if (used == NULL)
9073 {
9074 error_ret:
9075 if (local_syms != NULL
9076 && symtab_hdr->contents != (unsigned char *) local_syms)
9077 free (local_syms);
9078 if (sec != NULL
9079 && relstart != NULL
9080 && elf_section_data (sec)->relocs != relstart)
9081 free (relstart);
9082 if (toc_relocs != NULL
9083 && elf_section_data (toc)->relocs != toc_relocs)
9084 free (toc_relocs);
9085 if (skip != NULL)
9086 free (skip);
9087 return FALSE;
9088 }
9089
9090 /* Now check all kept sections that might reference the toc.
9091 Check the toc itself last. */
9092 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9093 : ibfd->sections);
9094 sec != NULL;
9095 sec = (sec == toc ? NULL
9096 : sec->next == NULL ? toc
9097 : sec->next == toc && toc->next ? toc->next
9098 : sec->next))
9099 {
9100 int repeat;
9101
9102 if (sec->reloc_count == 0
9103 || discarded_section (sec)
9104 || get_opd_info (sec)
9105 || (sec->flags & SEC_ALLOC) == 0
9106 || (sec->flags & SEC_DEBUGGING) != 0)
9107 continue;
9108
9109 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9110 info->keep_memory);
9111 if (relstart == NULL)
9112 {
9113 free (used);
9114 goto error_ret;
9115 }
9116
9117 /* Mark toc entries referenced as used. */
9118 do
9119 {
9120 repeat = 0;
9121 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9122 {
9123 enum elf_ppc64_reloc_type r_type;
9124 unsigned long r_symndx;
9125 asection *sym_sec;
9126 struct elf_link_hash_entry *h;
9127 Elf_Internal_Sym *sym;
9128 bfd_vma val;
9129 enum {no_check, check_lo, check_ha} insn_check;
9130
9131 r_type = ELF64_R_TYPE (rel->r_info);
9132 switch (r_type)
9133 {
9134 default:
9135 insn_check = no_check;
9136 break;
9137
9138 case R_PPC64_GOT_TLSLD16_HA:
9139 case R_PPC64_GOT_TLSGD16_HA:
9140 case R_PPC64_GOT_TPREL16_HA:
9141 case R_PPC64_GOT_DTPREL16_HA:
9142 case R_PPC64_GOT16_HA:
9143 case R_PPC64_TOC16_HA:
9144 insn_check = check_ha;
9145 break;
9146
9147 case R_PPC64_GOT_TLSLD16_LO:
9148 case R_PPC64_GOT_TLSGD16_LO:
9149 case R_PPC64_GOT_TPREL16_LO_DS:
9150 case R_PPC64_GOT_DTPREL16_LO_DS:
9151 case R_PPC64_GOT16_LO:
9152 case R_PPC64_GOT16_LO_DS:
9153 case R_PPC64_TOC16_LO:
9154 case R_PPC64_TOC16_LO_DS:
9155 insn_check = check_lo;
9156 break;
9157 }
9158
9159 if (insn_check != no_check)
9160 {
9161 bfd_vma off = rel->r_offset & ~3;
9162 unsigned char buf[4];
9163 unsigned int insn;
9164
9165 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9166 {
9167 free (used);
9168 goto error_ret;
9169 }
9170 insn = bfd_get_32 (ibfd, buf);
9171 if (insn_check == check_lo
9172 ? !ok_lo_toc_insn (insn, r_type)
9173 : ((insn & ((0x3f << 26) | 0x1f << 16))
9174 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9175 {
9176 char str[12];
9177
9178 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9179 sprintf (str, "%#08x", insn);
9180 info->callbacks->einfo
9181 /* xgettext:c-format */
9182 (_("%H: toc optimization is not supported for"
9183 " %s instruction.\n"),
9184 ibfd, sec, rel->r_offset & ~3, str);
9185 }
9186 }
9187
9188 switch (r_type)
9189 {
9190 case R_PPC64_TOC16:
9191 case R_PPC64_TOC16_LO:
9192 case R_PPC64_TOC16_HI:
9193 case R_PPC64_TOC16_HA:
9194 case R_PPC64_TOC16_DS:
9195 case R_PPC64_TOC16_LO_DS:
9196 /* In case we're taking addresses of toc entries. */
9197 case R_PPC64_ADDR64:
9198 break;
9199
9200 default:
9201 continue;
9202 }
9203
9204 r_symndx = ELF64_R_SYM (rel->r_info);
9205 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9206 r_symndx, ibfd))
9207 {
9208 free (used);
9209 goto error_ret;
9210 }
9211
9212 if (sym_sec != toc)
9213 continue;
9214
9215 if (h != NULL)
9216 val = h->root.u.def.value;
9217 else
9218 val = sym->st_value;
9219 val += rel->r_addend;
9220
9221 if (val >= toc->size)
9222 continue;
9223
9224 if ((skip[val >> 3] & can_optimize) != 0)
9225 {
9226 bfd_vma off;
9227 unsigned char opc;
9228
9229 switch (r_type)
9230 {
9231 case R_PPC64_TOC16_HA:
9232 break;
9233
9234 case R_PPC64_TOC16_LO_DS:
9235 off = rel->r_offset;
9236 off += (bfd_big_endian (ibfd) ? -2 : 3);
9237 if (!bfd_get_section_contents (ibfd, sec, &opc,
9238 off, 1))
9239 {
9240 free (used);
9241 goto error_ret;
9242 }
9243 if ((opc & (0x3f << 2)) == (58u << 2))
9244 break;
9245 /* Fall through. */
9246
9247 default:
9248 /* Wrong sort of reloc, or not a ld. We may
9249 as well clear ref_from_discarded too. */
9250 skip[val >> 3] = 0;
9251 }
9252 }
9253
9254 if (sec != toc)
9255 used[val >> 3] = 1;
9256 /* For the toc section, we only mark as used if this
9257 entry itself isn't unused. */
9258 else if ((used[rel->r_offset >> 3]
9259 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9260 && !used[val >> 3])
9261 {
9262 /* Do all the relocs again, to catch reference
9263 chains. */
9264 repeat = 1;
9265 used[val >> 3] = 1;
9266 }
9267 }
9268 }
9269 while (repeat);
9270
9271 if (elf_section_data (sec)->relocs != relstart)
9272 free (relstart);
9273 }
9274
9275 /* Merge the used and skip arrays. Assume that TOC
9276 doublewords not appearing as either used or unused belong
9277 to an entry more than one doubleword in size. */
9278 for (drop = skip, keep = used, last = 0, some_unused = 0;
9279 drop < skip + (toc->size + 7) / 8;
9280 ++drop, ++keep)
9281 {
9282 if (*keep)
9283 {
9284 *drop &= ~ref_from_discarded;
9285 if ((*drop & can_optimize) != 0)
9286 some_unused = 1;
9287 last = 0;
9288 }
9289 else if ((*drop & ref_from_discarded) != 0)
9290 {
9291 some_unused = 1;
9292 last = ref_from_discarded;
9293 }
9294 else
9295 *drop = last;
9296 }
9297
9298 free (used);
9299
9300 if (some_unused)
9301 {
9302 bfd_byte *contents, *src;
9303 unsigned long off;
9304 Elf_Internal_Sym *sym;
9305 bfd_boolean local_toc_syms = FALSE;
9306
9307 /* Shuffle the toc contents, and at the same time convert the
9308 skip array from booleans into offsets. */
9309 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9310 goto error_ret;
9311
9312 elf_section_data (toc)->this_hdr.contents = contents;
9313
9314 for (src = contents, off = 0, drop = skip;
9315 src < contents + toc->size;
9316 src += 8, ++drop)
9317 {
9318 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9319 off += 8;
9320 else if (off != 0)
9321 {
9322 *drop = off;
9323 memcpy (src - off, src, 8);
9324 }
9325 }
9326 *drop = off;
9327 toc->rawsize = toc->size;
9328 toc->size = src - contents - off;
9329
9330 /* Adjust addends for relocs against the toc section sym,
9331 and optimize any accesses we can. */
9332 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9333 {
9334 if (sec->reloc_count == 0
9335 || discarded_section (sec))
9336 continue;
9337
9338 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9339 info->keep_memory);
9340 if (relstart == NULL)
9341 goto error_ret;
9342
9343 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9344 {
9345 enum elf_ppc64_reloc_type r_type;
9346 unsigned long r_symndx;
9347 asection *sym_sec;
9348 struct elf_link_hash_entry *h;
9349 bfd_vma val;
9350
9351 r_type = ELF64_R_TYPE (rel->r_info);
9352 switch (r_type)
9353 {
9354 default:
9355 continue;
9356
9357 case R_PPC64_TOC16:
9358 case R_PPC64_TOC16_LO:
9359 case R_PPC64_TOC16_HI:
9360 case R_PPC64_TOC16_HA:
9361 case R_PPC64_TOC16_DS:
9362 case R_PPC64_TOC16_LO_DS:
9363 case R_PPC64_ADDR64:
9364 break;
9365 }
9366
9367 r_symndx = ELF64_R_SYM (rel->r_info);
9368 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9369 r_symndx, ibfd))
9370 goto error_ret;
9371
9372 if (sym_sec != toc)
9373 continue;
9374
9375 if (h != NULL)
9376 val = h->root.u.def.value;
9377 else
9378 {
9379 val = sym->st_value;
9380 if (val != 0)
9381 local_toc_syms = TRUE;
9382 }
9383
9384 val += rel->r_addend;
9385
9386 if (val > toc->rawsize)
9387 val = toc->rawsize;
9388 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9389 continue;
9390 else if ((skip[val >> 3] & can_optimize) != 0)
9391 {
9392 Elf_Internal_Rela *tocrel
9393 = toc_relocs + (skip[val >> 3] >> 2);
9394 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9395
9396 switch (r_type)
9397 {
9398 case R_PPC64_TOC16_HA:
9399 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9400 break;
9401
9402 case R_PPC64_TOC16_LO_DS:
9403 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9404 break;
9405
9406 default:
9407 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9408 ppc_howto_init ();
9409 info->callbacks->einfo
9410 /* xgettext:c-format */
9411 (_("%H: %s references "
9412 "optimized away TOC entry\n"),
9413 ibfd, sec, rel->r_offset,
9414 ppc64_elf_howto_table[r_type]->name);
9415 bfd_set_error (bfd_error_bad_value);
9416 goto error_ret;
9417 }
9418 rel->r_addend = tocrel->r_addend;
9419 elf_section_data (sec)->relocs = relstart;
9420 continue;
9421 }
9422
9423 if (h != NULL || sym->st_value != 0)
9424 continue;
9425
9426 rel->r_addend -= skip[val >> 3];
9427 elf_section_data (sec)->relocs = relstart;
9428 }
9429
9430 if (elf_section_data (sec)->relocs != relstart)
9431 free (relstart);
9432 }
9433
9434 /* We shouldn't have local or global symbols defined in the TOC,
9435 but handle them anyway. */
9436 if (local_syms != NULL)
9437 for (sym = local_syms;
9438 sym < local_syms + symtab_hdr->sh_info;
9439 ++sym)
9440 if (sym->st_value != 0
9441 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9442 {
9443 unsigned long i;
9444
9445 if (sym->st_value > toc->rawsize)
9446 i = toc->rawsize >> 3;
9447 else
9448 i = sym->st_value >> 3;
9449
9450 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9451 {
9452 if (local_toc_syms)
9453 _bfd_error_handler
9454 (_("%s defined on removed toc entry"),
9455 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9456 do
9457 ++i;
9458 while ((skip[i] & (ref_from_discarded | can_optimize)));
9459 sym->st_value = (bfd_vma) i << 3;
9460 }
9461
9462 sym->st_value -= skip[i];
9463 symtab_hdr->contents = (unsigned char *) local_syms;
9464 }
9465
9466 /* Adjust any global syms defined in this toc input section. */
9467 if (toc_inf.global_toc_syms)
9468 {
9469 toc_inf.toc = toc;
9470 toc_inf.skip = skip;
9471 toc_inf.global_toc_syms = FALSE;
9472 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9473 &toc_inf);
9474 }
9475
9476 if (toc->reloc_count != 0)
9477 {
9478 Elf_Internal_Shdr *rel_hdr;
9479 Elf_Internal_Rela *wrel;
9480 bfd_size_type sz;
9481
9482 /* Remove unused toc relocs, and adjust those we keep. */
9483 if (toc_relocs == NULL)
9484 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9485 info->keep_memory);
9486 if (toc_relocs == NULL)
9487 goto error_ret;
9488
9489 wrel = toc_relocs;
9490 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9491 if ((skip[rel->r_offset >> 3]
9492 & (ref_from_discarded | can_optimize)) == 0)
9493 {
9494 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9495 wrel->r_info = rel->r_info;
9496 wrel->r_addend = rel->r_addend;
9497 ++wrel;
9498 }
9499 else if (!dec_dynrel_count (rel->r_info, toc, info,
9500 &local_syms, NULL, NULL))
9501 goto error_ret;
9502
9503 elf_section_data (toc)->relocs = toc_relocs;
9504 toc->reloc_count = wrel - toc_relocs;
9505 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9506 sz = rel_hdr->sh_entsize;
9507 rel_hdr->sh_size = toc->reloc_count * sz;
9508 }
9509 }
9510 else if (toc_relocs != NULL
9511 && elf_section_data (toc)->relocs != toc_relocs)
9512 free (toc_relocs);
9513
9514 if (local_syms != NULL
9515 && symtab_hdr->contents != (unsigned char *) local_syms)
9516 {
9517 if (!info->keep_memory)
9518 free (local_syms);
9519 else
9520 symtab_hdr->contents = (unsigned char *) local_syms;
9521 }
9522 free (skip);
9523 }
9524
9525 return TRUE;
9526 }
9527
9528 /* Return true iff input section I references the TOC using
9529 instructions limited to +/-32k offsets. */
9530
9531 bfd_boolean
9532 ppc64_elf_has_small_toc_reloc (asection *i)
9533 {
9534 return (is_ppc64_elf (i->owner)
9535 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9536 }
9537
9538 /* Allocate space for one GOT entry. */
9539
9540 static void
9541 allocate_got (struct elf_link_hash_entry *h,
9542 struct bfd_link_info *info,
9543 struct got_entry *gent)
9544 {
9545 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9546 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9547 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9548 ? 16 : 8);
9549 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9550 ? 2 : 1) * sizeof (Elf64_External_Rela);
9551 asection *got = ppc64_elf_tdata (gent->owner)->got;
9552
9553 gent->got.offset = got->size;
9554 got->size += entsize;
9555
9556 if (h->type == STT_GNU_IFUNC)
9557 {
9558 htab->elf.irelplt->size += rentsize;
9559 htab->got_reli_size += rentsize;
9560 }
9561 else if (((bfd_link_pic (info)
9562 && !((gent->tls_type & TLS_TPREL) != 0
9563 && bfd_link_executable (info)
9564 && SYMBOL_REFERENCES_LOCAL (info, h)))
9565 || (htab->elf.dynamic_sections_created
9566 && h->dynindx != -1
9567 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9568 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9569 {
9570 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9571 relgot->size += rentsize;
9572 }
9573 }
9574
9575 /* This function merges got entries in the same toc group. */
9576
9577 static void
9578 merge_got_entries (struct got_entry **pent)
9579 {
9580 struct got_entry *ent, *ent2;
9581
9582 for (ent = *pent; ent != NULL; ent = ent->next)
9583 if (!ent->is_indirect)
9584 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9585 if (!ent2->is_indirect
9586 && ent2->addend == ent->addend
9587 && ent2->tls_type == ent->tls_type
9588 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9589 {
9590 ent2->is_indirect = TRUE;
9591 ent2->got.ent = ent;
9592 }
9593 }
9594
9595 /* If H is undefined, make it dynamic if that makes sense. */
9596
9597 static bfd_boolean
9598 ensure_undef_dynamic (struct bfd_link_info *info,
9599 struct elf_link_hash_entry *h)
9600 {
9601 struct elf_link_hash_table *htab = elf_hash_table (info);
9602
9603 if (htab->dynamic_sections_created
9604 && ((info->dynamic_undefined_weak != 0
9605 && h->root.type == bfd_link_hash_undefweak)
9606 || h->root.type == bfd_link_hash_undefined)
9607 && h->dynindx == -1
9608 && !h->forced_local
9609 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9610 return bfd_elf_link_record_dynamic_symbol (info, h);
9611 return TRUE;
9612 }
9613
9614 /* Allocate space in .plt, .got and associated reloc sections for
9615 dynamic relocs. */
9616
9617 static bfd_boolean
9618 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9619 {
9620 struct bfd_link_info *info;
9621 struct ppc_link_hash_table *htab;
9622 asection *s;
9623 struct ppc_link_hash_entry *eh;
9624 struct got_entry **pgent, *gent;
9625
9626 if (h->root.type == bfd_link_hash_indirect)
9627 return TRUE;
9628
9629 info = (struct bfd_link_info *) inf;
9630 htab = ppc_hash_table (info);
9631 if (htab == NULL)
9632 return FALSE;
9633
9634 eh = (struct ppc_link_hash_entry *) h;
9635 /* Run through the TLS GD got entries first if we're changing them
9636 to TPREL. */
9637 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9638 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9639 if (gent->got.refcount > 0
9640 && (gent->tls_type & TLS_GD) != 0)
9641 {
9642 /* This was a GD entry that has been converted to TPREL. If
9643 there happens to be a TPREL entry we can use that one. */
9644 struct got_entry *ent;
9645 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9646 if (ent->got.refcount > 0
9647 && (ent->tls_type & TLS_TPREL) != 0
9648 && ent->addend == gent->addend
9649 && ent->owner == gent->owner)
9650 {
9651 gent->got.refcount = 0;
9652 break;
9653 }
9654
9655 /* If not, then we'll be using our own TPREL entry. */
9656 if (gent->got.refcount != 0)
9657 gent->tls_type = TLS_TLS | TLS_TPREL;
9658 }
9659
9660 /* Remove any list entry that won't generate a word in the GOT before
9661 we call merge_got_entries. Otherwise we risk merging to empty
9662 entries. */
9663 pgent = &h->got.glist;
9664 while ((gent = *pgent) != NULL)
9665 if (gent->got.refcount > 0)
9666 {
9667 if ((gent->tls_type & TLS_LD) != 0
9668 && !h->def_dynamic)
9669 {
9670 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9671 *pgent = gent->next;
9672 }
9673 else
9674 pgent = &gent->next;
9675 }
9676 else
9677 *pgent = gent->next;
9678
9679 if (!htab->do_multi_toc)
9680 merge_got_entries (&h->got.glist);
9681
9682 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9683 if (!gent->is_indirect)
9684 {
9685 /* Make sure this symbol is output as a dynamic symbol. */
9686 if (!ensure_undef_dynamic (info, h))
9687 return FALSE;
9688
9689 if (!is_ppc64_elf (gent->owner))
9690 abort ();
9691
9692 allocate_got (h, info, gent);
9693 }
9694
9695 /* If no dynamic sections we can't have dynamic relocs, except for
9696 IFUNCs which are handled even in static executables. */
9697 if (!htab->elf.dynamic_sections_created
9698 && h->type != STT_GNU_IFUNC)
9699 eh->dyn_relocs = NULL;
9700
9701 /* Discard relocs on undefined symbols that must be local. */
9702 else if (h->root.type == bfd_link_hash_undefined
9703 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9704 eh->dyn_relocs = NULL;
9705
9706 /* Also discard relocs on undefined weak syms with non-default
9707 visibility, or when dynamic_undefined_weak says so. */
9708 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9709 eh->dyn_relocs = NULL;
9710
9711 if (eh->dyn_relocs != NULL)
9712 {
9713 struct elf_dyn_relocs *p, **pp;
9714
9715 /* In the shared -Bsymbolic case, discard space allocated for
9716 dynamic pc-relative relocs against symbols which turn out to
9717 be defined in regular objects. For the normal shared case,
9718 discard space for relocs that have become local due to symbol
9719 visibility changes. */
9720
9721 if (bfd_link_pic (info))
9722 {
9723 /* Relocs that use pc_count are those that appear on a call
9724 insn, or certain REL relocs (see must_be_dyn_reloc) that
9725 can be generated via assembly. We want calls to
9726 protected symbols to resolve directly to the function
9727 rather than going via the plt. If people want function
9728 pointer comparisons to work as expected then they should
9729 avoid writing weird assembly. */
9730 if (SYMBOL_CALLS_LOCAL (info, h))
9731 {
9732 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9733 {
9734 p->count -= p->pc_count;
9735 p->pc_count = 0;
9736 if (p->count == 0)
9737 *pp = p->next;
9738 else
9739 pp = &p->next;
9740 }
9741 }
9742
9743 if (eh->dyn_relocs != NULL)
9744 {
9745 /* Make sure this symbol is output as a dynamic symbol. */
9746 if (!ensure_undef_dynamic (info, h))
9747 return FALSE;
9748 }
9749 }
9750 else if (ELIMINATE_COPY_RELOCS && h->type != STT_GNU_IFUNC)
9751 {
9752 /* For the non-pic case, discard space for relocs against
9753 symbols which turn out to need copy relocs or are not
9754 dynamic. */
9755 if (h->dynamic_adjusted
9756 && !h->def_regular
9757 && !ELF_COMMON_DEF_P (h))
9758 {
9759 /* Make sure this symbol is output as a dynamic symbol. */
9760 if (!ensure_undef_dynamic (info, h))
9761 return FALSE;
9762
9763 if (h->dynindx == -1)
9764 eh->dyn_relocs = NULL;
9765 }
9766 else
9767 eh->dyn_relocs = NULL;
9768 }
9769
9770 /* Finally, allocate space. */
9771 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9772 {
9773 asection *sreloc = elf_section_data (p->sec)->sreloc;
9774 if (eh->elf.type == STT_GNU_IFUNC)
9775 sreloc = htab->elf.irelplt;
9776 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9777 }
9778 }
9779
9780 if ((htab->elf.dynamic_sections_created
9781 && h->dynindx != -1)
9782 || h->type == STT_GNU_IFUNC)
9783 {
9784 struct plt_entry *pent;
9785 bfd_boolean doneone = FALSE;
9786 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9787 if (pent->plt.refcount > 0)
9788 {
9789 if (!htab->elf.dynamic_sections_created
9790 || h->dynindx == -1)
9791 {
9792 s = htab->elf.iplt;
9793 pent->plt.offset = s->size;
9794 s->size += PLT_ENTRY_SIZE (htab);
9795 s = htab->elf.irelplt;
9796 }
9797 else
9798 {
9799 /* If this is the first .plt entry, make room for the special
9800 first entry. */
9801 s = htab->elf.splt;
9802 if (s->size == 0)
9803 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9804
9805 pent->plt.offset = s->size;
9806
9807 /* Make room for this entry. */
9808 s->size += PLT_ENTRY_SIZE (htab);
9809
9810 /* Make room for the .glink code. */
9811 s = htab->glink;
9812 if (s->size == 0)
9813 s->size += GLINK_CALL_STUB_SIZE;
9814 if (htab->opd_abi)
9815 {
9816 /* We need bigger stubs past index 32767. */
9817 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9818 s->size += 4;
9819 s->size += 2*4;
9820 }
9821 else
9822 s->size += 4;
9823
9824 /* We also need to make an entry in the .rela.plt section. */
9825 s = htab->elf.srelplt;
9826 }
9827 s->size += sizeof (Elf64_External_Rela);
9828 doneone = TRUE;
9829 }
9830 else
9831 pent->plt.offset = (bfd_vma) -1;
9832 if (!doneone)
9833 {
9834 h->plt.plist = NULL;
9835 h->needs_plt = 0;
9836 }
9837 }
9838 else
9839 {
9840 h->plt.plist = NULL;
9841 h->needs_plt = 0;
9842 }
9843
9844 return TRUE;
9845 }
9846
9847 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9848 to set up space for global entry stubs. These are put in glink,
9849 after the branch table. */
9850
9851 static bfd_boolean
9852 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9853 {
9854 struct bfd_link_info *info;
9855 struct ppc_link_hash_table *htab;
9856 struct plt_entry *pent;
9857 asection *s;
9858
9859 if (h->root.type == bfd_link_hash_indirect)
9860 return TRUE;
9861
9862 if (!h->pointer_equality_needed)
9863 return TRUE;
9864
9865 if (h->def_regular)
9866 return TRUE;
9867
9868 info = inf;
9869 htab = ppc_hash_table (info);
9870 if (htab == NULL)
9871 return FALSE;
9872
9873 s = htab->glink;
9874 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9875 if (pent->plt.offset != (bfd_vma) -1
9876 && pent->addend == 0)
9877 {
9878 /* For ELFv2, if this symbol is not defined in a regular file
9879 and we are not generating a shared library or pie, then we
9880 need to define the symbol in the executable on a call stub.
9881 This is to avoid text relocations. */
9882 s->size = (s->size + 15) & -16;
9883 h->root.type = bfd_link_hash_defined;
9884 h->root.u.def.section = s;
9885 h->root.u.def.value = s->size;
9886 s->size += 16;
9887 break;
9888 }
9889 return TRUE;
9890 }
9891
9892 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9893 read-only sections. */
9894
9895 static bfd_boolean
9896 maybe_set_textrel (struct elf_link_hash_entry *h, void *inf)
9897 {
9898 asection *sec;
9899
9900 if (h->root.type == bfd_link_hash_indirect)
9901 return TRUE;
9902
9903 sec = readonly_dynrelocs (h);
9904 if (sec != NULL)
9905 {
9906 struct bfd_link_info *info = (struct bfd_link_info *) inf;
9907
9908 info->flags |= DF_TEXTREL;
9909 info->callbacks->minfo
9910 (_("%B: dynamic relocation in read-only section `%A'\n"),
9911 sec->owner, sec);
9912
9913 /* Not an error, just cut short the traversal. */
9914 return FALSE;
9915 }
9916 return TRUE;
9917 }
9918
9919 /* Set the sizes of the dynamic sections. */
9920
9921 static bfd_boolean
9922 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9923 struct bfd_link_info *info)
9924 {
9925 struct ppc_link_hash_table *htab;
9926 bfd *dynobj;
9927 asection *s;
9928 bfd_boolean relocs;
9929 bfd *ibfd;
9930 struct got_entry *first_tlsld;
9931
9932 htab = ppc_hash_table (info);
9933 if (htab == NULL)
9934 return FALSE;
9935
9936 dynobj = htab->elf.dynobj;
9937 if (dynobj == NULL)
9938 abort ();
9939
9940 if (htab->elf.dynamic_sections_created)
9941 {
9942 /* Set the contents of the .interp section to the interpreter. */
9943 if (bfd_link_executable (info) && !info->nointerp)
9944 {
9945 s = bfd_get_linker_section (dynobj, ".interp");
9946 if (s == NULL)
9947 abort ();
9948 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9949 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9950 }
9951 }
9952
9953 /* Set up .got offsets for local syms, and space for local dynamic
9954 relocs. */
9955 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9956 {
9957 struct got_entry **lgot_ents;
9958 struct got_entry **end_lgot_ents;
9959 struct plt_entry **local_plt;
9960 struct plt_entry **end_local_plt;
9961 unsigned char *lgot_masks;
9962 bfd_size_type locsymcount;
9963 Elf_Internal_Shdr *symtab_hdr;
9964
9965 if (!is_ppc64_elf (ibfd))
9966 continue;
9967
9968 for (s = ibfd->sections; s != NULL; s = s->next)
9969 {
9970 struct ppc_dyn_relocs *p;
9971
9972 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9973 {
9974 if (!bfd_is_abs_section (p->sec)
9975 && bfd_is_abs_section (p->sec->output_section))
9976 {
9977 /* Input section has been discarded, either because
9978 it is a copy of a linkonce section or due to
9979 linker script /DISCARD/, so we'll be discarding
9980 the relocs too. */
9981 }
9982 else if (p->count != 0)
9983 {
9984 asection *srel = elf_section_data (p->sec)->sreloc;
9985 if (p->ifunc)
9986 srel = htab->elf.irelplt;
9987 srel->size += p->count * sizeof (Elf64_External_Rela);
9988 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9989 info->flags |= DF_TEXTREL;
9990 }
9991 }
9992 }
9993
9994 lgot_ents = elf_local_got_ents (ibfd);
9995 if (!lgot_ents)
9996 continue;
9997
9998 symtab_hdr = &elf_symtab_hdr (ibfd);
9999 locsymcount = symtab_hdr->sh_info;
10000 end_lgot_ents = lgot_ents + locsymcount;
10001 local_plt = (struct plt_entry **) end_lgot_ents;
10002 end_local_plt = local_plt + locsymcount;
10003 lgot_masks = (unsigned char *) end_local_plt;
10004 s = ppc64_elf_tdata (ibfd)->got;
10005 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10006 {
10007 struct got_entry **pent, *ent;
10008
10009 pent = lgot_ents;
10010 while ((ent = *pent) != NULL)
10011 if (ent->got.refcount > 0)
10012 {
10013 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10014 {
10015 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10016 *pent = ent->next;
10017 }
10018 else
10019 {
10020 unsigned int ent_size = 8;
10021 unsigned int rel_size = sizeof (Elf64_External_Rela);
10022
10023 ent->got.offset = s->size;
10024 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10025 {
10026 ent_size *= 2;
10027 rel_size *= 2;
10028 }
10029 s->size += ent_size;
10030 if ((*lgot_masks & PLT_IFUNC) != 0)
10031 {
10032 htab->elf.irelplt->size += rel_size;
10033 htab->got_reli_size += rel_size;
10034 }
10035 else if (bfd_link_pic (info)
10036 && !((ent->tls_type & TLS_TPREL) != 0
10037 && bfd_link_executable (info)))
10038 {
10039 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10040 srel->size += rel_size;
10041 }
10042 pent = &ent->next;
10043 }
10044 }
10045 else
10046 *pent = ent->next;
10047 }
10048
10049 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10050 for (; local_plt < end_local_plt; ++local_plt)
10051 {
10052 struct plt_entry *ent;
10053
10054 for (ent = *local_plt; ent != NULL; ent = ent->next)
10055 if (ent->plt.refcount > 0)
10056 {
10057 s = htab->elf.iplt;
10058 ent->plt.offset = s->size;
10059 s->size += PLT_ENTRY_SIZE (htab);
10060
10061 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10062 }
10063 else
10064 ent->plt.offset = (bfd_vma) -1;
10065 }
10066 }
10067
10068 /* Allocate global sym .plt and .got entries, and space for global
10069 sym dynamic relocs. */
10070 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10071 /* Stash the end of glink branch table. */
10072 if (htab->glink != NULL)
10073 htab->glink->rawsize = htab->glink->size;
10074
10075 if (!htab->opd_abi && !bfd_link_pic (info))
10076 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10077
10078 first_tlsld = NULL;
10079 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10080 {
10081 struct got_entry *ent;
10082
10083 if (!is_ppc64_elf (ibfd))
10084 continue;
10085
10086 ent = ppc64_tlsld_got (ibfd);
10087 if (ent->got.refcount > 0)
10088 {
10089 if (!htab->do_multi_toc && first_tlsld != NULL)
10090 {
10091 ent->is_indirect = TRUE;
10092 ent->got.ent = first_tlsld;
10093 }
10094 else
10095 {
10096 if (first_tlsld == NULL)
10097 first_tlsld = ent;
10098 s = ppc64_elf_tdata (ibfd)->got;
10099 ent->got.offset = s->size;
10100 ent->owner = ibfd;
10101 s->size += 16;
10102 if (bfd_link_pic (info))
10103 {
10104 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10105 srel->size += sizeof (Elf64_External_Rela);
10106 }
10107 }
10108 }
10109 else
10110 ent->got.offset = (bfd_vma) -1;
10111 }
10112
10113 /* We now have determined the sizes of the various dynamic sections.
10114 Allocate memory for them. */
10115 relocs = FALSE;
10116 for (s = dynobj->sections; s != NULL; s = s->next)
10117 {
10118 if ((s->flags & SEC_LINKER_CREATED) == 0)
10119 continue;
10120
10121 if (s == htab->brlt || s == htab->relbrlt)
10122 /* These haven't been allocated yet; don't strip. */
10123 continue;
10124 else if (s == htab->elf.sgot
10125 || s == htab->elf.splt
10126 || s == htab->elf.iplt
10127 || s == htab->glink
10128 || s == htab->elf.sdynbss
10129 || s == htab->elf.sdynrelro)
10130 {
10131 /* Strip this section if we don't need it; see the
10132 comment below. */
10133 }
10134 else if (s == htab->glink_eh_frame)
10135 {
10136 if (!bfd_is_abs_section (s->output_section))
10137 /* Not sized yet. */
10138 continue;
10139 }
10140 else if (CONST_STRNEQ (s->name, ".rela"))
10141 {
10142 if (s->size != 0)
10143 {
10144 if (s != htab->elf.srelplt)
10145 relocs = TRUE;
10146
10147 /* We use the reloc_count field as a counter if we need
10148 to copy relocs into the output file. */
10149 s->reloc_count = 0;
10150 }
10151 }
10152 else
10153 {
10154 /* It's not one of our sections, so don't allocate space. */
10155 continue;
10156 }
10157
10158 if (s->size == 0)
10159 {
10160 /* If we don't need this section, strip it from the
10161 output file. This is mostly to handle .rela.bss and
10162 .rela.plt. We must create both sections in
10163 create_dynamic_sections, because they must be created
10164 before the linker maps input sections to output
10165 sections. The linker does that before
10166 adjust_dynamic_symbol is called, and it is that
10167 function which decides whether anything needs to go
10168 into these sections. */
10169 s->flags |= SEC_EXCLUDE;
10170 continue;
10171 }
10172
10173 if (bfd_is_abs_section (s->output_section))
10174 _bfd_error_handler (_("warning: discarding dynamic section %s"),
10175 s->name);
10176
10177 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10178 continue;
10179
10180 /* Allocate memory for the section contents. We use bfd_zalloc
10181 here in case unused entries are not reclaimed before the
10182 section's contents are written out. This should not happen,
10183 but this way if it does we get a R_PPC64_NONE reloc in .rela
10184 sections instead of garbage.
10185 We also rely on the section contents being zero when writing
10186 the GOT and .dynrelro. */
10187 s->contents = bfd_zalloc (dynobj, s->size);
10188 if (s->contents == NULL)
10189 return FALSE;
10190 }
10191
10192 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10193 {
10194 if (!is_ppc64_elf (ibfd))
10195 continue;
10196
10197 s = ppc64_elf_tdata (ibfd)->got;
10198 if (s != NULL && s != htab->elf.sgot)
10199 {
10200 if (s->size == 0)
10201 s->flags |= SEC_EXCLUDE;
10202 else
10203 {
10204 s->contents = bfd_zalloc (ibfd, s->size);
10205 if (s->contents == NULL)
10206 return FALSE;
10207 }
10208 }
10209 s = ppc64_elf_tdata (ibfd)->relgot;
10210 if (s != NULL)
10211 {
10212 if (s->size == 0)
10213 s->flags |= SEC_EXCLUDE;
10214 else
10215 {
10216 s->contents = bfd_zalloc (ibfd, s->size);
10217 if (s->contents == NULL)
10218 return FALSE;
10219 relocs = TRUE;
10220 s->reloc_count = 0;
10221 }
10222 }
10223 }
10224
10225 if (htab->elf.dynamic_sections_created)
10226 {
10227 bfd_boolean tls_opt;
10228
10229 /* Add some entries to the .dynamic section. We fill in the
10230 values later, in ppc64_elf_finish_dynamic_sections, but we
10231 must add the entries now so that we get the correct size for
10232 the .dynamic section. The DT_DEBUG entry is filled in by the
10233 dynamic linker and used by the debugger. */
10234 #define add_dynamic_entry(TAG, VAL) \
10235 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10236
10237 if (bfd_link_executable (info))
10238 {
10239 if (!add_dynamic_entry (DT_DEBUG, 0))
10240 return FALSE;
10241 }
10242
10243 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10244 {
10245 if (!add_dynamic_entry (DT_PLTGOT, 0)
10246 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10247 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10248 || !add_dynamic_entry (DT_JMPREL, 0)
10249 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10250 return FALSE;
10251 }
10252
10253 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10254 {
10255 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10256 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10257 return FALSE;
10258 }
10259
10260 tls_opt = (htab->params->tls_get_addr_opt
10261 && htab->tls_get_addr_fd != NULL
10262 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10263 if (tls_opt || !htab->opd_abi)
10264 {
10265 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10266 return FALSE;
10267 }
10268
10269 if (relocs)
10270 {
10271 if (!add_dynamic_entry (DT_RELA, 0)
10272 || !add_dynamic_entry (DT_RELASZ, 0)
10273 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10274 return FALSE;
10275
10276 /* If any dynamic relocs apply to a read-only section,
10277 then we need a DT_TEXTREL entry. */
10278 if ((info->flags & DF_TEXTREL) == 0)
10279 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10280
10281 if ((info->flags & DF_TEXTREL) != 0)
10282 {
10283 if (!add_dynamic_entry (DT_TEXTREL, 0))
10284 return FALSE;
10285 }
10286 }
10287 }
10288 #undef add_dynamic_entry
10289
10290 return TRUE;
10291 }
10292
10293 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10294
10295 static bfd_boolean
10296 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10297 {
10298 if (h->plt.plist != NULL
10299 && !h->def_regular
10300 && !h->pointer_equality_needed)
10301 return FALSE;
10302
10303 return _bfd_elf_hash_symbol (h);
10304 }
10305
10306 /* Determine the type of stub needed, if any, for a call. */
10307
10308 static inline enum ppc_stub_type
10309 ppc_type_of_stub (asection *input_sec,
10310 const Elf_Internal_Rela *rel,
10311 struct ppc_link_hash_entry **hash,
10312 struct plt_entry **plt_ent,
10313 bfd_vma destination,
10314 unsigned long local_off)
10315 {
10316 struct ppc_link_hash_entry *h = *hash;
10317 bfd_vma location;
10318 bfd_vma branch_offset;
10319 bfd_vma max_branch_offset;
10320 enum elf_ppc64_reloc_type r_type;
10321
10322 if (h != NULL)
10323 {
10324 struct plt_entry *ent;
10325 struct ppc_link_hash_entry *fdh = h;
10326 if (h->oh != NULL
10327 && h->oh->is_func_descriptor)
10328 {
10329 fdh = ppc_follow_link (h->oh);
10330 *hash = fdh;
10331 }
10332
10333 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10334 if (ent->addend == rel->r_addend
10335 && ent->plt.offset != (bfd_vma) -1)
10336 {
10337 *plt_ent = ent;
10338 return ppc_stub_plt_call;
10339 }
10340
10341 /* Here, we know we don't have a plt entry. If we don't have a
10342 either a defined function descriptor or a defined entry symbol
10343 in a regular object file, then it is pointless trying to make
10344 any other type of stub. */
10345 if (!is_static_defined (&fdh->elf)
10346 && !is_static_defined (&h->elf))
10347 return ppc_stub_none;
10348 }
10349 else if (elf_local_got_ents (input_sec->owner) != NULL)
10350 {
10351 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10352 struct plt_entry **local_plt = (struct plt_entry **)
10353 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10354 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10355
10356 if (local_plt[r_symndx] != NULL)
10357 {
10358 struct plt_entry *ent;
10359
10360 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10361 if (ent->addend == rel->r_addend
10362 && ent->plt.offset != (bfd_vma) -1)
10363 {
10364 *plt_ent = ent;
10365 return ppc_stub_plt_call;
10366 }
10367 }
10368 }
10369
10370 /* Determine where the call point is. */
10371 location = (input_sec->output_offset
10372 + input_sec->output_section->vma
10373 + rel->r_offset);
10374
10375 branch_offset = destination - location;
10376 r_type = ELF64_R_TYPE (rel->r_info);
10377
10378 /* Determine if a long branch stub is needed. */
10379 max_branch_offset = 1 << 25;
10380 if (r_type != R_PPC64_REL24)
10381 max_branch_offset = 1 << 15;
10382
10383 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10384 /* We need a stub. Figure out whether a long_branch or plt_branch
10385 is needed later. */
10386 return ppc_stub_long_branch;
10387
10388 return ppc_stub_none;
10389 }
10390
10391 /* With power7 weakly ordered memory model, it is possible for ld.so
10392 to update a plt entry in one thread and have another thread see a
10393 stale zero toc entry. To avoid this we need some sort of acquire
10394 barrier in the call stub. One solution is to make the load of the
10395 toc word seem to appear to depend on the load of the function entry
10396 word. Another solution is to test for r2 being zero, and branch to
10397 the appropriate glink entry if so.
10398
10399 . fake dep barrier compare
10400 . ld 12,xxx(2) ld 12,xxx(2)
10401 . mtctr 12 mtctr 12
10402 . xor 11,12,12 ld 2,xxx+8(2)
10403 . add 2,2,11 cmpldi 2,0
10404 . ld 2,xxx+8(2) bnectr+
10405 . bctr b <glink_entry>
10406
10407 The solution involving the compare turns out to be faster, so
10408 that's what we use unless the branch won't reach. */
10409
10410 #define ALWAYS_USE_FAKE_DEP 0
10411 #define ALWAYS_EMIT_R2SAVE 0
10412
10413 #define PPC_LO(v) ((v) & 0xffff)
10414 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10415 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10416
10417 static inline unsigned int
10418 plt_stub_size (struct ppc_link_hash_table *htab,
10419 struct ppc_stub_hash_entry *stub_entry,
10420 bfd_vma off)
10421 {
10422 unsigned size = 12;
10423
10424 if (ALWAYS_EMIT_R2SAVE
10425 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10426 size += 4;
10427 if (PPC_HA (off) != 0)
10428 size += 4;
10429 if (htab->opd_abi)
10430 {
10431 size += 4;
10432 if (htab->params->plt_static_chain)
10433 size += 4;
10434 if (htab->params->plt_thread_safe
10435 && htab->elf.dynamic_sections_created
10436 && stub_entry->h != NULL
10437 && stub_entry->h->elf.dynindx != -1)
10438 size += 8;
10439 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10440 size += 4;
10441 }
10442 if (stub_entry->h != NULL
10443 && (stub_entry->h == htab->tls_get_addr_fd
10444 || stub_entry->h == htab->tls_get_addr)
10445 && htab->params->tls_get_addr_opt)
10446 {
10447 size += 7 * 4;
10448 if (ALWAYS_EMIT_R2SAVE
10449 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10450 size += 6 * 4;
10451 }
10452 return size;
10453 }
10454
10455 /* Depending on the sign of plt_stub_align:
10456 If positive, return the padding to align to a 2**plt_stub_align
10457 boundary.
10458 If negative, if this stub would cross fewer 2**plt_stub_align
10459 boundaries if we align, then return the padding needed to do so. */
10460
10461 static inline unsigned int
10462 plt_stub_pad (struct ppc_link_hash_table *htab,
10463 struct ppc_stub_hash_entry *stub_entry,
10464 bfd_vma plt_off)
10465 {
10466 int stub_align;
10467 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10468 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10469
10470 if (htab->params->plt_stub_align >= 0)
10471 {
10472 stub_align = 1 << htab->params->plt_stub_align;
10473 if ((stub_off & (stub_align - 1)) != 0)
10474 return stub_align - (stub_off & (stub_align - 1));
10475 return 0;
10476 }
10477
10478 stub_align = 1 << -htab->params->plt_stub_align;
10479 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10480 > ((stub_size - 1) & -stub_align))
10481 return stub_align - (stub_off & (stub_align - 1));
10482 return 0;
10483 }
10484
10485 /* Build a .plt call stub. */
10486
10487 static inline bfd_byte *
10488 build_plt_stub (struct ppc_link_hash_table *htab,
10489 struct ppc_stub_hash_entry *stub_entry,
10490 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10491 {
10492 bfd *obfd = htab->params->stub_bfd;
10493 bfd_boolean plt_load_toc = htab->opd_abi;
10494 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10495 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10496 && htab->elf.dynamic_sections_created
10497 && stub_entry->h != NULL
10498 && stub_entry->h->elf.dynindx != -1);
10499 bfd_boolean use_fake_dep = plt_thread_safe;
10500 bfd_vma cmp_branch_off = 0;
10501
10502 if (!ALWAYS_USE_FAKE_DEP
10503 && plt_load_toc
10504 && plt_thread_safe
10505 && !((stub_entry->h == htab->tls_get_addr_fd
10506 || stub_entry->h == htab->tls_get_addr)
10507 && htab->params->tls_get_addr_opt))
10508 {
10509 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10510 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10511 / PLT_ENTRY_SIZE (htab));
10512 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10513 bfd_vma to, from;
10514
10515 if (pltindex > 32768)
10516 glinkoff += (pltindex - 32768) * 4;
10517 to = (glinkoff
10518 + htab->glink->output_offset
10519 + htab->glink->output_section->vma);
10520 from = (p - stub_entry->group->stub_sec->contents
10521 + 4 * (ALWAYS_EMIT_R2SAVE
10522 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10523 + 4 * (PPC_HA (offset) != 0)
10524 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10525 != PPC_HA (offset))
10526 + 4 * (plt_static_chain != 0)
10527 + 20
10528 + stub_entry->group->stub_sec->output_offset
10529 + stub_entry->group->stub_sec->output_section->vma);
10530 cmp_branch_off = to - from;
10531 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10532 }
10533
10534 if (PPC_HA (offset) != 0)
10535 {
10536 if (r != NULL)
10537 {
10538 if (ALWAYS_EMIT_R2SAVE
10539 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10540 r[0].r_offset += 4;
10541 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10542 r[1].r_offset = r[0].r_offset + 4;
10543 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10544 r[1].r_addend = r[0].r_addend;
10545 if (plt_load_toc)
10546 {
10547 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10548 {
10549 r[2].r_offset = r[1].r_offset + 4;
10550 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10551 r[2].r_addend = r[0].r_addend;
10552 }
10553 else
10554 {
10555 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10556 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10557 r[2].r_addend = r[0].r_addend + 8;
10558 if (plt_static_chain)
10559 {
10560 r[3].r_offset = r[2].r_offset + 4;
10561 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10562 r[3].r_addend = r[0].r_addend + 16;
10563 }
10564 }
10565 }
10566 }
10567 if (ALWAYS_EMIT_R2SAVE
10568 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10569 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10570 if (plt_load_toc)
10571 {
10572 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10573 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10574 }
10575 else
10576 {
10577 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10578 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10579 }
10580 if (plt_load_toc
10581 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10582 {
10583 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10584 offset = 0;
10585 }
10586 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10587 if (plt_load_toc)
10588 {
10589 if (use_fake_dep)
10590 {
10591 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10592 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10593 }
10594 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10595 if (plt_static_chain)
10596 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10597 }
10598 }
10599 else
10600 {
10601 if (r != NULL)
10602 {
10603 if (ALWAYS_EMIT_R2SAVE
10604 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10605 r[0].r_offset += 4;
10606 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10607 if (plt_load_toc)
10608 {
10609 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10610 {
10611 r[1].r_offset = r[0].r_offset + 4;
10612 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10613 r[1].r_addend = r[0].r_addend;
10614 }
10615 else
10616 {
10617 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10618 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10619 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10620 if (plt_static_chain)
10621 {
10622 r[2].r_offset = r[1].r_offset + 4;
10623 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10624 r[2].r_addend = r[0].r_addend + 8;
10625 }
10626 }
10627 }
10628 }
10629 if (ALWAYS_EMIT_R2SAVE
10630 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10631 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10632 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10633 if (plt_load_toc
10634 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10635 {
10636 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10637 offset = 0;
10638 }
10639 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10640 if (plt_load_toc)
10641 {
10642 if (use_fake_dep)
10643 {
10644 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10645 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10646 }
10647 if (plt_static_chain)
10648 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10649 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10650 }
10651 }
10652 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10653 {
10654 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10655 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10656 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10657 }
10658 else
10659 bfd_put_32 (obfd, BCTR, p), p += 4;
10660 return p;
10661 }
10662
10663 /* Build a special .plt call stub for __tls_get_addr. */
10664
10665 #define LD_R11_0R3 0xe9630000
10666 #define LD_R12_0R3 0xe9830000
10667 #define MR_R0_R3 0x7c601b78
10668 #define CMPDI_R11_0 0x2c2b0000
10669 #define ADD_R3_R12_R13 0x7c6c6a14
10670 #define BEQLR 0x4d820020
10671 #define MR_R3_R0 0x7c030378
10672 #define STD_R11_0R1 0xf9610000
10673 #define BCTRL 0x4e800421
10674 #define LD_R11_0R1 0xe9610000
10675 #define MTLR_R11 0x7d6803a6
10676
10677 static inline bfd_byte *
10678 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10679 struct ppc_stub_hash_entry *stub_entry,
10680 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10681 {
10682 bfd *obfd = htab->params->stub_bfd;
10683
10684 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10685 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10686 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10687 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10688 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10689 bfd_put_32 (obfd, BEQLR, p), p += 4;
10690 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10691 if (r != NULL)
10692 r[0].r_offset += 7 * 4;
10693 if (!ALWAYS_EMIT_R2SAVE
10694 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10695 return build_plt_stub (htab, stub_entry, p, offset, r);
10696
10697 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10698 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10699
10700 if (r != NULL)
10701 r[0].r_offset += 2 * 4;
10702 p = build_plt_stub (htab, stub_entry, p, offset, r);
10703 bfd_put_32 (obfd, BCTRL, p - 4);
10704
10705 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10706 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10707 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10708 bfd_put_32 (obfd, BLR, p), p += 4;
10709
10710 return p;
10711 }
10712
10713 static Elf_Internal_Rela *
10714 get_relocs (asection *sec, int count)
10715 {
10716 Elf_Internal_Rela *relocs;
10717 struct bfd_elf_section_data *elfsec_data;
10718
10719 elfsec_data = elf_section_data (sec);
10720 relocs = elfsec_data->relocs;
10721 if (relocs == NULL)
10722 {
10723 bfd_size_type relsize;
10724 relsize = sec->reloc_count * sizeof (*relocs);
10725 relocs = bfd_alloc (sec->owner, relsize);
10726 if (relocs == NULL)
10727 return NULL;
10728 elfsec_data->relocs = relocs;
10729 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10730 sizeof (Elf_Internal_Shdr));
10731 if (elfsec_data->rela.hdr == NULL)
10732 return NULL;
10733 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10734 * sizeof (Elf64_External_Rela));
10735 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10736 sec->reloc_count = 0;
10737 }
10738 relocs += sec->reloc_count;
10739 sec->reloc_count += count;
10740 return relocs;
10741 }
10742
10743 static bfd_vma
10744 get_r2off (struct bfd_link_info *info,
10745 struct ppc_stub_hash_entry *stub_entry)
10746 {
10747 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10748 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10749
10750 if (r2off == 0)
10751 {
10752 /* Support linking -R objects. Get the toc pointer from the
10753 opd entry. */
10754 char buf[8];
10755 if (!htab->opd_abi)
10756 return r2off;
10757 asection *opd = stub_entry->h->elf.root.u.def.section;
10758 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10759
10760 if (strcmp (opd->name, ".opd") != 0
10761 || opd->reloc_count != 0)
10762 {
10763 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10764 stub_entry->h->elf.root.root.string);
10765 bfd_set_error (bfd_error_bad_value);
10766 return (bfd_vma) -1;
10767 }
10768 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10769 return (bfd_vma) -1;
10770 r2off = bfd_get_64 (opd->owner, buf);
10771 r2off -= elf_gp (info->output_bfd);
10772 }
10773 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10774 return r2off;
10775 }
10776
10777 static bfd_boolean
10778 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10779 {
10780 struct ppc_stub_hash_entry *stub_entry;
10781 struct ppc_branch_hash_entry *br_entry;
10782 struct bfd_link_info *info;
10783 struct ppc_link_hash_table *htab;
10784 bfd_byte *loc;
10785 bfd_byte *p;
10786 bfd_vma dest, off;
10787 int size;
10788 Elf_Internal_Rela *r;
10789 asection *plt;
10790
10791 /* Massage our args to the form they really have. */
10792 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10793 info = in_arg;
10794
10795 htab = ppc_hash_table (info);
10796 if (htab == NULL)
10797 return FALSE;
10798
10799 /* Make a note of the offset within the stubs for this entry. */
10800 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10801 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10802
10803 htab->stub_count[stub_entry->stub_type - 1] += 1;
10804 switch (stub_entry->stub_type)
10805 {
10806 case ppc_stub_long_branch:
10807 case ppc_stub_long_branch_r2off:
10808 /* Branches are relative. This is where we are going to. */
10809 dest = (stub_entry->target_value
10810 + stub_entry->target_section->output_offset
10811 + stub_entry->target_section->output_section->vma);
10812 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10813 off = dest;
10814
10815 /* And this is where we are coming from. */
10816 off -= (stub_entry->stub_offset
10817 + stub_entry->group->stub_sec->output_offset
10818 + stub_entry->group->stub_sec->output_section->vma);
10819
10820 size = 4;
10821 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10822 {
10823 bfd_vma r2off = get_r2off (info, stub_entry);
10824
10825 if (r2off == (bfd_vma) -1)
10826 {
10827 htab->stub_error = TRUE;
10828 return FALSE;
10829 }
10830 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10831 loc += 4;
10832 size = 8;
10833 if (PPC_HA (r2off) != 0)
10834 {
10835 bfd_put_32 (htab->params->stub_bfd,
10836 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10837 loc += 4;
10838 size += 4;
10839 }
10840 if (PPC_LO (r2off) != 0)
10841 {
10842 bfd_put_32 (htab->params->stub_bfd,
10843 ADDI_R2_R2 | PPC_LO (r2off), loc);
10844 loc += 4;
10845 size += 4;
10846 }
10847 off -= size - 4;
10848 }
10849 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10850
10851 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10852 {
10853 info->callbacks->einfo
10854 (_("%P: long branch stub `%s' offset overflow\n"),
10855 stub_entry->root.string);
10856 htab->stub_error = TRUE;
10857 return FALSE;
10858 }
10859
10860 if (info->emitrelocations)
10861 {
10862 r = get_relocs (stub_entry->group->stub_sec, 1);
10863 if (r == NULL)
10864 return FALSE;
10865 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10866 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10867 r->r_addend = dest;
10868 if (stub_entry->h != NULL)
10869 {
10870 struct elf_link_hash_entry **hashes;
10871 unsigned long symndx;
10872 struct ppc_link_hash_entry *h;
10873
10874 hashes = elf_sym_hashes (htab->params->stub_bfd);
10875 if (hashes == NULL)
10876 {
10877 bfd_size_type hsize;
10878
10879 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10880 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10881 if (hashes == NULL)
10882 return FALSE;
10883 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10884 htab->stub_globals = 1;
10885 }
10886 symndx = htab->stub_globals++;
10887 h = stub_entry->h;
10888 hashes[symndx] = &h->elf;
10889 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10890 if (h->oh != NULL && h->oh->is_func)
10891 h = ppc_follow_link (h->oh);
10892 if (h->elf.root.u.def.section != stub_entry->target_section)
10893 /* H is an opd symbol. The addend must be zero. */
10894 r->r_addend = 0;
10895 else
10896 {
10897 off = (h->elf.root.u.def.value
10898 + h->elf.root.u.def.section->output_offset
10899 + h->elf.root.u.def.section->output_section->vma);
10900 r->r_addend -= off;
10901 }
10902 }
10903 }
10904 break;
10905
10906 case ppc_stub_plt_branch:
10907 case ppc_stub_plt_branch_r2off:
10908 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10909 stub_entry->root.string + 9,
10910 FALSE, FALSE);
10911 if (br_entry == NULL)
10912 {
10913 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10914 stub_entry->root.string);
10915 htab->stub_error = TRUE;
10916 return FALSE;
10917 }
10918
10919 dest = (stub_entry->target_value
10920 + stub_entry->target_section->output_offset
10921 + stub_entry->target_section->output_section->vma);
10922 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10923 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10924
10925 bfd_put_64 (htab->brlt->owner, dest,
10926 htab->brlt->contents + br_entry->offset);
10927
10928 if (br_entry->iter == htab->stub_iteration)
10929 {
10930 br_entry->iter = 0;
10931
10932 if (htab->relbrlt != NULL)
10933 {
10934 /* Create a reloc for the branch lookup table entry. */
10935 Elf_Internal_Rela rela;
10936 bfd_byte *rl;
10937
10938 rela.r_offset = (br_entry->offset
10939 + htab->brlt->output_offset
10940 + htab->brlt->output_section->vma);
10941 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10942 rela.r_addend = dest;
10943
10944 rl = htab->relbrlt->contents;
10945 rl += (htab->relbrlt->reloc_count++
10946 * sizeof (Elf64_External_Rela));
10947 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10948 }
10949 else if (info->emitrelocations)
10950 {
10951 r = get_relocs (htab->brlt, 1);
10952 if (r == NULL)
10953 return FALSE;
10954 /* brlt, being SEC_LINKER_CREATED does not go through the
10955 normal reloc processing. Symbols and offsets are not
10956 translated from input file to output file form, so
10957 set up the offset per the output file. */
10958 r->r_offset = (br_entry->offset
10959 + htab->brlt->output_offset
10960 + htab->brlt->output_section->vma);
10961 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10962 r->r_addend = dest;
10963 }
10964 }
10965
10966 dest = (br_entry->offset
10967 + htab->brlt->output_offset
10968 + htab->brlt->output_section->vma);
10969
10970 off = (dest
10971 - elf_gp (info->output_bfd)
10972 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10973
10974 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10975 {
10976 info->callbacks->einfo
10977 (_("%P: linkage table error against `%T'\n"),
10978 stub_entry->root.string);
10979 bfd_set_error (bfd_error_bad_value);
10980 htab->stub_error = TRUE;
10981 return FALSE;
10982 }
10983
10984 if (info->emitrelocations)
10985 {
10986 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10987 if (r == NULL)
10988 return FALSE;
10989 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10990 if (bfd_big_endian (info->output_bfd))
10991 r[0].r_offset += 2;
10992 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10993 r[0].r_offset += 4;
10994 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10995 r[0].r_addend = dest;
10996 if (PPC_HA (off) != 0)
10997 {
10998 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10999 r[1].r_offset = r[0].r_offset + 4;
11000 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11001 r[1].r_addend = r[0].r_addend;
11002 }
11003 }
11004
11005 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11006 {
11007 if (PPC_HA (off) != 0)
11008 {
11009 size = 16;
11010 bfd_put_32 (htab->params->stub_bfd,
11011 ADDIS_R12_R2 | PPC_HA (off), loc);
11012 loc += 4;
11013 bfd_put_32 (htab->params->stub_bfd,
11014 LD_R12_0R12 | PPC_LO (off), loc);
11015 }
11016 else
11017 {
11018 size = 12;
11019 bfd_put_32 (htab->params->stub_bfd,
11020 LD_R12_0R2 | PPC_LO (off), loc);
11021 }
11022 }
11023 else
11024 {
11025 bfd_vma r2off = get_r2off (info, stub_entry);
11026
11027 if (r2off == (bfd_vma) -1)
11028 {
11029 htab->stub_error = TRUE;
11030 return FALSE;
11031 }
11032
11033 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11034 loc += 4;
11035 size = 16;
11036 if (PPC_HA (off) != 0)
11037 {
11038 size += 4;
11039 bfd_put_32 (htab->params->stub_bfd,
11040 ADDIS_R12_R2 | PPC_HA (off), loc);
11041 loc += 4;
11042 bfd_put_32 (htab->params->stub_bfd,
11043 LD_R12_0R12 | PPC_LO (off), loc);
11044 }
11045 else
11046 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11047
11048 if (PPC_HA (r2off) != 0)
11049 {
11050 size += 4;
11051 loc += 4;
11052 bfd_put_32 (htab->params->stub_bfd,
11053 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11054 }
11055 if (PPC_LO (r2off) != 0)
11056 {
11057 size += 4;
11058 loc += 4;
11059 bfd_put_32 (htab->params->stub_bfd,
11060 ADDI_R2_R2 | PPC_LO (r2off), loc);
11061 }
11062 }
11063 loc += 4;
11064 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11065 loc += 4;
11066 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11067 break;
11068
11069 case ppc_stub_plt_call:
11070 case ppc_stub_plt_call_r2save:
11071 if (stub_entry->h != NULL
11072 && stub_entry->h->is_func_descriptor
11073 && stub_entry->h->oh != NULL)
11074 {
11075 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11076
11077 /* If the old-ABI "dot-symbol" is undefined make it weak so
11078 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11079 if (fh->elf.root.type == bfd_link_hash_undefined
11080 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11081 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11082 fh->elf.root.type = bfd_link_hash_undefweak;
11083 }
11084
11085 /* Now build the stub. */
11086 dest = stub_entry->plt_ent->plt.offset & ~1;
11087 if (dest >= (bfd_vma) -2)
11088 abort ();
11089
11090 plt = htab->elf.splt;
11091 if (!htab->elf.dynamic_sections_created
11092 || stub_entry->h == NULL
11093 || stub_entry->h->elf.dynindx == -1)
11094 plt = htab->elf.iplt;
11095
11096 dest += plt->output_offset + plt->output_section->vma;
11097
11098 if (stub_entry->h == NULL
11099 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11100 {
11101 Elf_Internal_Rela rela;
11102 bfd_byte *rl;
11103
11104 rela.r_offset = dest;
11105 if (htab->opd_abi)
11106 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11107 else
11108 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11109 rela.r_addend = (stub_entry->target_value
11110 + stub_entry->target_section->output_offset
11111 + stub_entry->target_section->output_section->vma);
11112
11113 rl = (htab->elf.irelplt->contents
11114 + (htab->elf.irelplt->reloc_count++
11115 * sizeof (Elf64_External_Rela)));
11116 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11117 stub_entry->plt_ent->plt.offset |= 1;
11118 htab->local_ifunc_resolver = 1;
11119 }
11120
11121 off = (dest
11122 - elf_gp (info->output_bfd)
11123 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11124
11125 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11126 {
11127 info->callbacks->einfo
11128 /* xgettext:c-format */
11129 (_("%P: linkage table error against `%T'\n"),
11130 stub_entry->h != NULL
11131 ? stub_entry->h->elf.root.root.string
11132 : "<local sym>");
11133 bfd_set_error (bfd_error_bad_value);
11134 htab->stub_error = TRUE;
11135 return FALSE;
11136 }
11137
11138 if (htab->params->plt_stub_align != 0)
11139 {
11140 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11141
11142 stub_entry->group->stub_sec->size += pad;
11143 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11144 loc += pad;
11145 }
11146
11147 r = NULL;
11148 if (info->emitrelocations)
11149 {
11150 r = get_relocs (stub_entry->group->stub_sec,
11151 ((PPC_HA (off) != 0)
11152 + (htab->opd_abi
11153 ? 2 + (htab->params->plt_static_chain
11154 && PPC_HA (off + 16) == PPC_HA (off))
11155 : 1)));
11156 if (r == NULL)
11157 return FALSE;
11158 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11159 if (bfd_big_endian (info->output_bfd))
11160 r[0].r_offset += 2;
11161 r[0].r_addend = dest;
11162 }
11163 if (stub_entry->h != NULL
11164 && (stub_entry->h == htab->tls_get_addr_fd
11165 || stub_entry->h == htab->tls_get_addr)
11166 && htab->params->tls_get_addr_opt)
11167 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11168 else
11169 p = build_plt_stub (htab, stub_entry, loc, off, r);
11170 size = p - loc;
11171 break;
11172
11173 case ppc_stub_save_res:
11174 return TRUE;
11175
11176 default:
11177 BFD_FAIL ();
11178 return FALSE;
11179 }
11180
11181 stub_entry->group->stub_sec->size += size;
11182
11183 if (htab->params->emit_stub_syms)
11184 {
11185 struct elf_link_hash_entry *h;
11186 size_t len1, len2;
11187 char *name;
11188 const char *const stub_str[] = { "long_branch",
11189 "long_branch_r2off",
11190 "plt_branch",
11191 "plt_branch_r2off",
11192 "plt_call",
11193 "plt_call" };
11194
11195 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11196 len2 = strlen (stub_entry->root.string);
11197 name = bfd_malloc (len1 + len2 + 2);
11198 if (name == NULL)
11199 return FALSE;
11200 memcpy (name, stub_entry->root.string, 9);
11201 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11202 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11203 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11204 if (h == NULL)
11205 return FALSE;
11206 if (h->root.type == bfd_link_hash_new)
11207 {
11208 h->root.type = bfd_link_hash_defined;
11209 h->root.u.def.section = stub_entry->group->stub_sec;
11210 h->root.u.def.value = stub_entry->stub_offset;
11211 h->ref_regular = 1;
11212 h->def_regular = 1;
11213 h->ref_regular_nonweak = 1;
11214 h->forced_local = 1;
11215 h->non_elf = 0;
11216 h->root.linker_def = 1;
11217 }
11218 }
11219
11220 return TRUE;
11221 }
11222
11223 /* As above, but don't actually build the stub. Just bump offset so
11224 we know stub section sizes, and select plt_branch stubs where
11225 long_branch stubs won't do. */
11226
11227 static bfd_boolean
11228 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11229 {
11230 struct ppc_stub_hash_entry *stub_entry;
11231 struct bfd_link_info *info;
11232 struct ppc_link_hash_table *htab;
11233 bfd_vma off;
11234 int size;
11235
11236 /* Massage our args to the form they really have. */
11237 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11238 info = in_arg;
11239
11240 htab = ppc_hash_table (info);
11241 if (htab == NULL)
11242 return FALSE;
11243
11244 if (stub_entry->h != NULL
11245 && stub_entry->h->save_res
11246 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11247 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11248 {
11249 /* Don't make stubs to out-of-line register save/restore
11250 functions. Instead, emit copies of the functions. */
11251 stub_entry->group->needs_save_res = 1;
11252 stub_entry->stub_type = ppc_stub_save_res;
11253 return TRUE;
11254 }
11255
11256 if (stub_entry->stub_type == ppc_stub_plt_call
11257 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11258 {
11259 asection *plt;
11260 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11261 if (off >= (bfd_vma) -2)
11262 abort ();
11263 plt = htab->elf.splt;
11264 if (!htab->elf.dynamic_sections_created
11265 || stub_entry->h == NULL
11266 || stub_entry->h->elf.dynindx == -1)
11267 plt = htab->elf.iplt;
11268 off += (plt->output_offset
11269 + plt->output_section->vma
11270 - elf_gp (info->output_bfd)
11271 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11272
11273 size = plt_stub_size (htab, stub_entry, off);
11274 if (stub_entry->h != NULL
11275 && (stub_entry->h == htab->tls_get_addr_fd
11276 || stub_entry->h == htab->tls_get_addr)
11277 && htab->params->tls_get_addr_opt
11278 && (ALWAYS_EMIT_R2SAVE
11279 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11280 stub_entry->group->tls_get_addr_opt_bctrl
11281 = stub_entry->group->stub_sec->size + size - 5 * 4;
11282
11283 if (htab->params->plt_stub_align)
11284 size += plt_stub_pad (htab, stub_entry, off);
11285 if (info->emitrelocations)
11286 {
11287 stub_entry->group->stub_sec->reloc_count
11288 += ((PPC_HA (off) != 0)
11289 + (htab->opd_abi
11290 ? 2 + (htab->params->plt_static_chain
11291 && PPC_HA (off + 16) == PPC_HA (off))
11292 : 1));
11293 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11294 }
11295 }
11296 else
11297 {
11298 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11299 variants. */
11300 bfd_vma r2off = 0;
11301 bfd_vma local_off = 0;
11302
11303 off = (stub_entry->target_value
11304 + stub_entry->target_section->output_offset
11305 + stub_entry->target_section->output_section->vma);
11306 off -= (stub_entry->group->stub_sec->size
11307 + stub_entry->group->stub_sec->output_offset
11308 + stub_entry->group->stub_sec->output_section->vma);
11309
11310 /* Reset the stub type from the plt variant in case we now
11311 can reach with a shorter stub. */
11312 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11313 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11314
11315 size = 4;
11316 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11317 {
11318 r2off = get_r2off (info, stub_entry);
11319 if (r2off == (bfd_vma) -1)
11320 {
11321 htab->stub_error = TRUE;
11322 return FALSE;
11323 }
11324 size = 8;
11325 if (PPC_HA (r2off) != 0)
11326 size += 4;
11327 if (PPC_LO (r2off) != 0)
11328 size += 4;
11329 off -= size - 4;
11330 }
11331
11332 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11333
11334 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11335 Do the same for -R objects without function descriptors. */
11336 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11337 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11338 && r2off == 0
11339 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11340 {
11341 struct ppc_branch_hash_entry *br_entry;
11342
11343 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11344 stub_entry->root.string + 9,
11345 TRUE, FALSE);
11346 if (br_entry == NULL)
11347 {
11348 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11349 stub_entry->root.string);
11350 htab->stub_error = TRUE;
11351 return FALSE;
11352 }
11353
11354 if (br_entry->iter != htab->stub_iteration)
11355 {
11356 br_entry->iter = htab->stub_iteration;
11357 br_entry->offset = htab->brlt->size;
11358 htab->brlt->size += 8;
11359
11360 if (htab->relbrlt != NULL)
11361 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11362 else if (info->emitrelocations)
11363 {
11364 htab->brlt->reloc_count += 1;
11365 htab->brlt->flags |= SEC_RELOC;
11366 }
11367 }
11368
11369 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11370 off = (br_entry->offset
11371 + htab->brlt->output_offset
11372 + htab->brlt->output_section->vma
11373 - elf_gp (info->output_bfd)
11374 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11375
11376 if (info->emitrelocations)
11377 {
11378 stub_entry->group->stub_sec->reloc_count
11379 += 1 + (PPC_HA (off) != 0);
11380 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11381 }
11382
11383 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11384 {
11385 size = 12;
11386 if (PPC_HA (off) != 0)
11387 size = 16;
11388 }
11389 else
11390 {
11391 size = 16;
11392 if (PPC_HA (off) != 0)
11393 size += 4;
11394
11395 if (PPC_HA (r2off) != 0)
11396 size += 4;
11397 if (PPC_LO (r2off) != 0)
11398 size += 4;
11399 }
11400 }
11401 else if (info->emitrelocations)
11402 {
11403 stub_entry->group->stub_sec->reloc_count += 1;
11404 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11405 }
11406 }
11407
11408 stub_entry->group->stub_sec->size += size;
11409 return TRUE;
11410 }
11411
11412 /* Set up various things so that we can make a list of input sections
11413 for each output section included in the link. Returns -1 on error,
11414 0 when no stubs will be needed, and 1 on success. */
11415
11416 int
11417 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11418 {
11419 unsigned int id;
11420 bfd_size_type amt;
11421 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11422
11423 if (htab == NULL)
11424 return -1;
11425
11426 htab->sec_info_arr_size = bfd_get_next_section_id ();
11427 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11428 htab->sec_info = bfd_zmalloc (amt);
11429 if (htab->sec_info == NULL)
11430 return -1;
11431
11432 /* Set toc_off for com, und, abs and ind sections. */
11433 for (id = 0; id < 3; id++)
11434 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11435
11436 return 1;
11437 }
11438
11439 /* Set up for first pass at multitoc partitioning. */
11440
11441 void
11442 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11443 {
11444 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11445
11446 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11447 htab->toc_bfd = NULL;
11448 htab->toc_first_sec = NULL;
11449 }
11450
11451 /* The linker repeatedly calls this function for each TOC input section
11452 and linker generated GOT section. Group input bfds such that the toc
11453 within a group is less than 64k in size. */
11454
11455 bfd_boolean
11456 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11457 {
11458 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11459 bfd_vma addr, off, limit;
11460
11461 if (htab == NULL)
11462 return FALSE;
11463
11464 if (!htab->second_toc_pass)
11465 {
11466 /* Keep track of the first .toc or .got section for this input bfd. */
11467 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11468
11469 if (new_bfd)
11470 {
11471 htab->toc_bfd = isec->owner;
11472 htab->toc_first_sec = isec;
11473 }
11474
11475 addr = isec->output_offset + isec->output_section->vma;
11476 off = addr - htab->toc_curr;
11477 limit = 0x80008000;
11478 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11479 limit = 0x10000;
11480 if (off + isec->size > limit)
11481 {
11482 addr = (htab->toc_first_sec->output_offset
11483 + htab->toc_first_sec->output_section->vma);
11484 htab->toc_curr = addr;
11485 htab->toc_curr &= -TOC_BASE_ALIGN;
11486 }
11487
11488 /* toc_curr is the base address of this toc group. Set elf_gp
11489 for the input section to be the offset relative to the
11490 output toc base plus 0x8000. Making the input elf_gp an
11491 offset allows us to move the toc as a whole without
11492 recalculating input elf_gp. */
11493 off = htab->toc_curr - elf_gp (info->output_bfd);
11494 off += TOC_BASE_OFF;
11495
11496 /* Die if someone uses a linker script that doesn't keep input
11497 file .toc and .got together. */
11498 if (new_bfd
11499 && elf_gp (isec->owner) != 0
11500 && elf_gp (isec->owner) != off)
11501 return FALSE;
11502
11503 elf_gp (isec->owner) = off;
11504 return TRUE;
11505 }
11506
11507 /* During the second pass toc_first_sec points to the start of
11508 a toc group, and toc_curr is used to track the old elf_gp.
11509 We use toc_bfd to ensure we only look at each bfd once. */
11510 if (htab->toc_bfd == isec->owner)
11511 return TRUE;
11512 htab->toc_bfd = isec->owner;
11513
11514 if (htab->toc_first_sec == NULL
11515 || htab->toc_curr != elf_gp (isec->owner))
11516 {
11517 htab->toc_curr = elf_gp (isec->owner);
11518 htab->toc_first_sec = isec;
11519 }
11520 addr = (htab->toc_first_sec->output_offset
11521 + htab->toc_first_sec->output_section->vma);
11522 off = addr - elf_gp (info->output_bfd) + TOC_BASE_OFF;
11523 elf_gp (isec->owner) = off;
11524
11525 return TRUE;
11526 }
11527
11528 /* Called via elf_link_hash_traverse to merge GOT entries for global
11529 symbol H. */
11530
11531 static bfd_boolean
11532 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11533 {
11534 if (h->root.type == bfd_link_hash_indirect)
11535 return TRUE;
11536
11537 merge_got_entries (&h->got.glist);
11538
11539 return TRUE;
11540 }
11541
11542 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11543 symbol H. */
11544
11545 static bfd_boolean
11546 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11547 {
11548 struct got_entry *gent;
11549
11550 if (h->root.type == bfd_link_hash_indirect)
11551 return TRUE;
11552
11553 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11554 if (!gent->is_indirect)
11555 allocate_got (h, (struct bfd_link_info *) inf, gent);
11556 return TRUE;
11557 }
11558
11559 /* Called on the first multitoc pass after the last call to
11560 ppc64_elf_next_toc_section. This function removes duplicate GOT
11561 entries. */
11562
11563 bfd_boolean
11564 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11565 {
11566 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11567 struct bfd *ibfd, *ibfd2;
11568 bfd_boolean done_something;
11569
11570 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11571
11572 if (!htab->do_multi_toc)
11573 return FALSE;
11574
11575 /* Merge global sym got entries within a toc group. */
11576 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11577
11578 /* And tlsld_got. */
11579 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11580 {
11581 struct got_entry *ent, *ent2;
11582
11583 if (!is_ppc64_elf (ibfd))
11584 continue;
11585
11586 ent = ppc64_tlsld_got (ibfd);
11587 if (!ent->is_indirect
11588 && ent->got.offset != (bfd_vma) -1)
11589 {
11590 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11591 {
11592 if (!is_ppc64_elf (ibfd2))
11593 continue;
11594
11595 ent2 = ppc64_tlsld_got (ibfd2);
11596 if (!ent2->is_indirect
11597 && ent2->got.offset != (bfd_vma) -1
11598 && elf_gp (ibfd2) == elf_gp (ibfd))
11599 {
11600 ent2->is_indirect = TRUE;
11601 ent2->got.ent = ent;
11602 }
11603 }
11604 }
11605 }
11606
11607 /* Zap sizes of got sections. */
11608 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11609 htab->elf.irelplt->size -= htab->got_reli_size;
11610 htab->got_reli_size = 0;
11611
11612 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11613 {
11614 asection *got, *relgot;
11615
11616 if (!is_ppc64_elf (ibfd))
11617 continue;
11618
11619 got = ppc64_elf_tdata (ibfd)->got;
11620 if (got != NULL)
11621 {
11622 got->rawsize = got->size;
11623 got->size = 0;
11624 relgot = ppc64_elf_tdata (ibfd)->relgot;
11625 relgot->rawsize = relgot->size;
11626 relgot->size = 0;
11627 }
11628 }
11629
11630 /* Now reallocate the got, local syms first. We don't need to
11631 allocate section contents again since we never increase size. */
11632 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11633 {
11634 struct got_entry **lgot_ents;
11635 struct got_entry **end_lgot_ents;
11636 struct plt_entry **local_plt;
11637 struct plt_entry **end_local_plt;
11638 unsigned char *lgot_masks;
11639 bfd_size_type locsymcount;
11640 Elf_Internal_Shdr *symtab_hdr;
11641 asection *s;
11642
11643 if (!is_ppc64_elf (ibfd))
11644 continue;
11645
11646 lgot_ents = elf_local_got_ents (ibfd);
11647 if (!lgot_ents)
11648 continue;
11649
11650 symtab_hdr = &elf_symtab_hdr (ibfd);
11651 locsymcount = symtab_hdr->sh_info;
11652 end_lgot_ents = lgot_ents + locsymcount;
11653 local_plt = (struct plt_entry **) end_lgot_ents;
11654 end_local_plt = local_plt + locsymcount;
11655 lgot_masks = (unsigned char *) end_local_plt;
11656 s = ppc64_elf_tdata (ibfd)->got;
11657 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11658 {
11659 struct got_entry *ent;
11660
11661 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11662 {
11663 unsigned int ent_size = 8;
11664 unsigned int rel_size = sizeof (Elf64_External_Rela);
11665
11666 ent->got.offset = s->size;
11667 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11668 {
11669 ent_size *= 2;
11670 rel_size *= 2;
11671 }
11672 s->size += ent_size;
11673 if ((*lgot_masks & PLT_IFUNC) != 0)
11674 {
11675 htab->elf.irelplt->size += rel_size;
11676 htab->got_reli_size += rel_size;
11677 }
11678 else if (bfd_link_pic (info))
11679 {
11680 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11681 srel->size += rel_size;
11682 }
11683 }
11684 }
11685 }
11686
11687 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11688
11689 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11690 {
11691 struct got_entry *ent;
11692
11693 if (!is_ppc64_elf (ibfd))
11694 continue;
11695
11696 ent = ppc64_tlsld_got (ibfd);
11697 if (!ent->is_indirect
11698 && ent->got.offset != (bfd_vma) -1)
11699 {
11700 asection *s = ppc64_elf_tdata (ibfd)->got;
11701 ent->got.offset = s->size;
11702 s->size += 16;
11703 if (bfd_link_pic (info))
11704 {
11705 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11706 srel->size += sizeof (Elf64_External_Rela);
11707 }
11708 }
11709 }
11710
11711 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11712 if (!done_something)
11713 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11714 {
11715 asection *got;
11716
11717 if (!is_ppc64_elf (ibfd))
11718 continue;
11719
11720 got = ppc64_elf_tdata (ibfd)->got;
11721 if (got != NULL)
11722 {
11723 done_something = got->rawsize != got->size;
11724 if (done_something)
11725 break;
11726 }
11727 }
11728
11729 if (done_something)
11730 (*htab->params->layout_sections_again) ();
11731
11732 /* Set up for second pass over toc sections to recalculate elf_gp
11733 on input sections. */
11734 htab->toc_bfd = NULL;
11735 htab->toc_first_sec = NULL;
11736 htab->second_toc_pass = TRUE;
11737 return done_something;
11738 }
11739
11740 /* Called after second pass of multitoc partitioning. */
11741
11742 void
11743 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11744 {
11745 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11746
11747 /* After the second pass, toc_curr tracks the TOC offset used
11748 for code sections below in ppc64_elf_next_input_section. */
11749 htab->toc_curr = TOC_BASE_OFF;
11750 }
11751
11752 /* No toc references were found in ISEC. If the code in ISEC makes no
11753 calls, then there's no need to use toc adjusting stubs when branching
11754 into ISEC. Actually, indirect calls from ISEC are OK as they will
11755 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11756 needed, and 2 if a cyclical call-graph was found but no other reason
11757 for a stub was detected. If called from the top level, a return of
11758 2 means the same as a return of 0. */
11759
11760 static int
11761 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11762 {
11763 int ret;
11764
11765 /* Mark this section as checked. */
11766 isec->call_check_done = 1;
11767
11768 /* We know none of our code bearing sections will need toc stubs. */
11769 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11770 return 0;
11771
11772 if (isec->size == 0)
11773 return 0;
11774
11775 if (isec->output_section == NULL)
11776 return 0;
11777
11778 ret = 0;
11779 if (isec->reloc_count != 0)
11780 {
11781 Elf_Internal_Rela *relstart, *rel;
11782 Elf_Internal_Sym *local_syms;
11783 struct ppc_link_hash_table *htab;
11784
11785 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11786 info->keep_memory);
11787 if (relstart == NULL)
11788 return -1;
11789
11790 /* Look for branches to outside of this section. */
11791 local_syms = NULL;
11792 htab = ppc_hash_table (info);
11793 if (htab == NULL)
11794 return -1;
11795
11796 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11797 {
11798 enum elf_ppc64_reloc_type r_type;
11799 unsigned long r_symndx;
11800 struct elf_link_hash_entry *h;
11801 struct ppc_link_hash_entry *eh;
11802 Elf_Internal_Sym *sym;
11803 asection *sym_sec;
11804 struct _opd_sec_data *opd;
11805 bfd_vma sym_value;
11806 bfd_vma dest;
11807
11808 r_type = ELF64_R_TYPE (rel->r_info);
11809 if (r_type != R_PPC64_REL24
11810 && r_type != R_PPC64_REL14
11811 && r_type != R_PPC64_REL14_BRTAKEN
11812 && r_type != R_PPC64_REL14_BRNTAKEN)
11813 continue;
11814
11815 r_symndx = ELF64_R_SYM (rel->r_info);
11816 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11817 isec->owner))
11818 {
11819 ret = -1;
11820 break;
11821 }
11822
11823 /* Calls to dynamic lib functions go through a plt call stub
11824 that uses r2. */
11825 eh = (struct ppc_link_hash_entry *) h;
11826 if (eh != NULL
11827 && (eh->elf.plt.plist != NULL
11828 || (eh->oh != NULL
11829 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11830 {
11831 ret = 1;
11832 break;
11833 }
11834
11835 if (sym_sec == NULL)
11836 /* Ignore other undefined symbols. */
11837 continue;
11838
11839 /* Assume branches to other sections not included in the
11840 link need stubs too, to cover -R and absolute syms. */
11841 if (sym_sec->output_section == NULL)
11842 {
11843 ret = 1;
11844 break;
11845 }
11846
11847 if (h == NULL)
11848 sym_value = sym->st_value;
11849 else
11850 {
11851 if (h->root.type != bfd_link_hash_defined
11852 && h->root.type != bfd_link_hash_defweak)
11853 abort ();
11854 sym_value = h->root.u.def.value;
11855 }
11856 sym_value += rel->r_addend;
11857
11858 /* If this branch reloc uses an opd sym, find the code section. */
11859 opd = get_opd_info (sym_sec);
11860 if (opd != NULL)
11861 {
11862 if (h == NULL && opd->adjust != NULL)
11863 {
11864 long adjust;
11865
11866 adjust = opd->adjust[OPD_NDX (sym_value)];
11867 if (adjust == -1)
11868 /* Assume deleted functions won't ever be called. */
11869 continue;
11870 sym_value += adjust;
11871 }
11872
11873 dest = opd_entry_value (sym_sec, sym_value,
11874 &sym_sec, NULL, FALSE);
11875 if (dest == (bfd_vma) -1)
11876 continue;
11877 }
11878 else
11879 dest = (sym_value
11880 + sym_sec->output_offset
11881 + sym_sec->output_section->vma);
11882
11883 /* Ignore branch to self. */
11884 if (sym_sec == isec)
11885 continue;
11886
11887 /* If the called function uses the toc, we need a stub. */
11888 if (sym_sec->has_toc_reloc
11889 || sym_sec->makes_toc_func_call)
11890 {
11891 ret = 1;
11892 break;
11893 }
11894
11895 /* Assume any branch that needs a long branch stub might in fact
11896 need a plt_branch stub. A plt_branch stub uses r2. */
11897 else if (dest - (isec->output_offset
11898 + isec->output_section->vma
11899 + rel->r_offset) + (1 << 25)
11900 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11901 ? h->other
11902 : sym->st_other))
11903 {
11904 ret = 1;
11905 break;
11906 }
11907
11908 /* If calling back to a section in the process of being
11909 tested, we can't say for sure that no toc adjusting stubs
11910 are needed, so don't return zero. */
11911 else if (sym_sec->call_check_in_progress)
11912 ret = 2;
11913
11914 /* Branches to another section that itself doesn't have any TOC
11915 references are OK. Recursively call ourselves to check. */
11916 else if (!sym_sec->call_check_done)
11917 {
11918 int recur;
11919
11920 /* Mark current section as indeterminate, so that other
11921 sections that call back to current won't be marked as
11922 known. */
11923 isec->call_check_in_progress = 1;
11924 recur = toc_adjusting_stub_needed (info, sym_sec);
11925 isec->call_check_in_progress = 0;
11926
11927 if (recur != 0)
11928 {
11929 ret = recur;
11930 if (recur != 2)
11931 break;
11932 }
11933 }
11934 }
11935
11936 if (local_syms != NULL
11937 && (elf_symtab_hdr (isec->owner).contents
11938 != (unsigned char *) local_syms))
11939 free (local_syms);
11940 if (elf_section_data (isec)->relocs != relstart)
11941 free (relstart);
11942 }
11943
11944 if ((ret & 1) == 0
11945 && isec->map_head.s != NULL
11946 && (strcmp (isec->output_section->name, ".init") == 0
11947 || strcmp (isec->output_section->name, ".fini") == 0))
11948 {
11949 if (isec->map_head.s->has_toc_reloc
11950 || isec->map_head.s->makes_toc_func_call)
11951 ret = 1;
11952 else if (!isec->map_head.s->call_check_done)
11953 {
11954 int recur;
11955 isec->call_check_in_progress = 1;
11956 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11957 isec->call_check_in_progress = 0;
11958 if (recur != 0)
11959 ret = recur;
11960 }
11961 }
11962
11963 if (ret == 1)
11964 isec->makes_toc_func_call = 1;
11965
11966 return ret;
11967 }
11968
11969 /* The linker repeatedly calls this function for each input section,
11970 in the order that input sections are linked into output sections.
11971 Build lists of input sections to determine groupings between which
11972 we may insert linker stubs. */
11973
11974 bfd_boolean
11975 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11976 {
11977 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11978
11979 if (htab == NULL)
11980 return FALSE;
11981
11982 if ((isec->output_section->flags & SEC_CODE) != 0
11983 && isec->output_section->id < htab->sec_info_arr_size)
11984 {
11985 /* This happens to make the list in reverse order,
11986 which is what we want. */
11987 htab->sec_info[isec->id].u.list
11988 = htab->sec_info[isec->output_section->id].u.list;
11989 htab->sec_info[isec->output_section->id].u.list = isec;
11990 }
11991
11992 if (htab->multi_toc_needed)
11993 {
11994 /* Analyse sections that aren't already flagged as needing a
11995 valid toc pointer. Exclude .fixup for the linux kernel.
11996 .fixup contains branches, but only back to the function that
11997 hit an exception. */
11998 if (!(isec->has_toc_reloc
11999 || (isec->flags & SEC_CODE) == 0
12000 || strcmp (isec->name, ".fixup") == 0
12001 || isec->call_check_done))
12002 {
12003 if (toc_adjusting_stub_needed (info, isec) < 0)
12004 return FALSE;
12005 }
12006 /* Make all sections use the TOC assigned for this object file.
12007 This will be wrong for pasted sections; We fix that in
12008 check_pasted_section(). */
12009 if (elf_gp (isec->owner) != 0)
12010 htab->toc_curr = elf_gp (isec->owner);
12011 }
12012
12013 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12014 return TRUE;
12015 }
12016
12017 /* Check that all .init and .fini sections use the same toc, if they
12018 have toc relocs. */
12019
12020 static bfd_boolean
12021 check_pasted_section (struct bfd_link_info *info, const char *name)
12022 {
12023 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12024
12025 if (o != NULL)
12026 {
12027 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12028 bfd_vma toc_off = 0;
12029 asection *i;
12030
12031 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12032 if (i->has_toc_reloc)
12033 {
12034 if (toc_off == 0)
12035 toc_off = htab->sec_info[i->id].toc_off;
12036 else if (toc_off != htab->sec_info[i->id].toc_off)
12037 return FALSE;
12038 }
12039
12040 if (toc_off == 0)
12041 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12042 if (i->makes_toc_func_call)
12043 {
12044 toc_off = htab->sec_info[i->id].toc_off;
12045 break;
12046 }
12047
12048 /* Make sure the whole pasted function uses the same toc offset. */
12049 if (toc_off != 0)
12050 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12051 htab->sec_info[i->id].toc_off = toc_off;
12052 }
12053 return TRUE;
12054 }
12055
12056 bfd_boolean
12057 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12058 {
12059 return (check_pasted_section (info, ".init")
12060 & check_pasted_section (info, ".fini"));
12061 }
12062
12063 /* See whether we can group stub sections together. Grouping stub
12064 sections may result in fewer stubs. More importantly, we need to
12065 put all .init* and .fini* stubs at the beginning of the .init or
12066 .fini output sections respectively, because glibc splits the
12067 _init and _fini functions into multiple parts. Putting a stub in
12068 the middle of a function is not a good idea. */
12069
12070 static bfd_boolean
12071 group_sections (struct bfd_link_info *info,
12072 bfd_size_type stub_group_size,
12073 bfd_boolean stubs_always_before_branch)
12074 {
12075 struct ppc_link_hash_table *htab;
12076 asection *osec;
12077 bfd_boolean suppress_size_errors;
12078
12079 htab = ppc_hash_table (info);
12080 if (htab == NULL)
12081 return FALSE;
12082
12083 suppress_size_errors = FALSE;
12084 if (stub_group_size == 1)
12085 {
12086 /* Default values. */
12087 if (stubs_always_before_branch)
12088 stub_group_size = 0x1e00000;
12089 else
12090 stub_group_size = 0x1c00000;
12091 suppress_size_errors = TRUE;
12092 }
12093
12094 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12095 {
12096 asection *tail;
12097
12098 if (osec->id >= htab->sec_info_arr_size)
12099 continue;
12100
12101 tail = htab->sec_info[osec->id].u.list;
12102 while (tail != NULL)
12103 {
12104 asection *curr;
12105 asection *prev;
12106 bfd_size_type total;
12107 bfd_boolean big_sec;
12108 bfd_vma curr_toc;
12109 struct map_stub *group;
12110 bfd_size_type group_size;
12111
12112 curr = tail;
12113 total = tail->size;
12114 group_size = (ppc64_elf_section_data (tail) != NULL
12115 && ppc64_elf_section_data (tail)->has_14bit_branch
12116 ? stub_group_size >> 10 : stub_group_size);
12117
12118 big_sec = total > group_size;
12119 if (big_sec && !suppress_size_errors)
12120 /* xgettext:c-format */
12121 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12122 tail->owner, tail);
12123 curr_toc = htab->sec_info[tail->id].toc_off;
12124
12125 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12126 && ((total += curr->output_offset - prev->output_offset)
12127 < (ppc64_elf_section_data (prev) != NULL
12128 && ppc64_elf_section_data (prev)->has_14bit_branch
12129 ? (group_size = stub_group_size >> 10) : group_size))
12130 && htab->sec_info[prev->id].toc_off == curr_toc)
12131 curr = prev;
12132
12133 /* OK, the size from the start of CURR to the end is less
12134 than group_size and thus can be handled by one stub
12135 section. (or the tail section is itself larger than
12136 group_size, in which case we may be toast.) We should
12137 really be keeping track of the total size of stubs added
12138 here, as stubs contribute to the final output section
12139 size. That's a little tricky, and this way will only
12140 break if stubs added make the total size more than 2^25,
12141 ie. for the default stub_group_size, if stubs total more
12142 than 2097152 bytes, or nearly 75000 plt call stubs. */
12143 group = bfd_alloc (curr->owner, sizeof (*group));
12144 if (group == NULL)
12145 return FALSE;
12146 group->link_sec = curr;
12147 group->stub_sec = NULL;
12148 group->needs_save_res = 0;
12149 group->tls_get_addr_opt_bctrl = -1u;
12150 group->next = htab->group;
12151 htab->group = group;
12152 do
12153 {
12154 prev = htab->sec_info[tail->id].u.list;
12155 /* Set up this stub group. */
12156 htab->sec_info[tail->id].u.group = group;
12157 }
12158 while (tail != curr && (tail = prev) != NULL);
12159
12160 /* But wait, there's more! Input sections up to group_size
12161 bytes before the stub section can be handled by it too.
12162 Don't do this if we have a really large section after the
12163 stubs, as adding more stubs increases the chance that
12164 branches may not reach into the stub section. */
12165 if (!stubs_always_before_branch && !big_sec)
12166 {
12167 total = 0;
12168 while (prev != NULL
12169 && ((total += tail->output_offset - prev->output_offset)
12170 < (ppc64_elf_section_data (prev) != NULL
12171 && ppc64_elf_section_data (prev)->has_14bit_branch
12172 ? (group_size = stub_group_size >> 10) : group_size))
12173 && htab->sec_info[prev->id].toc_off == curr_toc)
12174 {
12175 tail = prev;
12176 prev = htab->sec_info[tail->id].u.list;
12177 htab->sec_info[tail->id].u.group = group;
12178 }
12179 }
12180 tail = prev;
12181 }
12182 }
12183 return TRUE;
12184 }
12185
12186 static const unsigned char glink_eh_frame_cie[] =
12187 {
12188 0, 0, 0, 16, /* length. */
12189 0, 0, 0, 0, /* id. */
12190 1, /* CIE version. */
12191 'z', 'R', 0, /* Augmentation string. */
12192 4, /* Code alignment. */
12193 0x78, /* Data alignment. */
12194 65, /* RA reg. */
12195 1, /* Augmentation size. */
12196 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12197 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12198 };
12199
12200 static size_t
12201 stub_eh_frame_size (struct map_stub *group, size_t align)
12202 {
12203 size_t this_size = 17;
12204 if (group->tls_get_addr_opt_bctrl != -1u)
12205 {
12206 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12207 if (to_bctrl < 64)
12208 this_size += 1;
12209 else if (to_bctrl < 256)
12210 this_size += 2;
12211 else if (to_bctrl < 65536)
12212 this_size += 3;
12213 else
12214 this_size += 5;
12215 this_size += 6;
12216 }
12217 this_size = (this_size + align - 1) & -align;
12218 return this_size;
12219 }
12220
12221 /* Stripping output sections is normally done before dynamic section
12222 symbols have been allocated. This function is called later, and
12223 handles cases like htab->brlt which is mapped to its own output
12224 section. */
12225
12226 static void
12227 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12228 {
12229 if (isec->size == 0
12230 && isec->output_section->size == 0
12231 && !(isec->output_section->flags & SEC_KEEP)
12232 && !bfd_section_removed_from_list (info->output_bfd,
12233 isec->output_section)
12234 && elf_section_data (isec->output_section)->dynindx == 0)
12235 {
12236 isec->output_section->flags |= SEC_EXCLUDE;
12237 bfd_section_list_remove (info->output_bfd, isec->output_section);
12238 info->output_bfd->section_count--;
12239 }
12240 }
12241
12242 /* Determine and set the size of the stub section for a final link.
12243
12244 The basic idea here is to examine all the relocations looking for
12245 PC-relative calls to a target that is unreachable with a "bl"
12246 instruction. */
12247
12248 bfd_boolean
12249 ppc64_elf_size_stubs (struct bfd_link_info *info)
12250 {
12251 bfd_size_type stub_group_size;
12252 bfd_boolean stubs_always_before_branch;
12253 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12254
12255 if (htab == NULL)
12256 return FALSE;
12257
12258 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12259 htab->params->plt_thread_safe = 1;
12260 if (!htab->opd_abi)
12261 htab->params->plt_thread_safe = 0;
12262 else if (htab->params->plt_thread_safe == -1)
12263 {
12264 static const char *const thread_starter[] =
12265 {
12266 "pthread_create",
12267 /* libstdc++ */
12268 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12269 /* librt */
12270 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12271 "mq_notify", "create_timer",
12272 /* libanl */
12273 "getaddrinfo_a",
12274 /* libgomp */
12275 "GOMP_parallel",
12276 "GOMP_parallel_start",
12277 "GOMP_parallel_loop_static",
12278 "GOMP_parallel_loop_static_start",
12279 "GOMP_parallel_loop_dynamic",
12280 "GOMP_parallel_loop_dynamic_start",
12281 "GOMP_parallel_loop_guided",
12282 "GOMP_parallel_loop_guided_start",
12283 "GOMP_parallel_loop_runtime",
12284 "GOMP_parallel_loop_runtime_start",
12285 "GOMP_parallel_sections",
12286 "GOMP_parallel_sections_start",
12287 /* libgo */
12288 "__go_go",
12289 };
12290 unsigned i;
12291
12292 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12293 {
12294 struct elf_link_hash_entry *h;
12295 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12296 FALSE, FALSE, TRUE);
12297 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12298 if (htab->params->plt_thread_safe)
12299 break;
12300 }
12301 }
12302 stubs_always_before_branch = htab->params->group_size < 0;
12303 if (htab->params->group_size < 0)
12304 stub_group_size = -htab->params->group_size;
12305 else
12306 stub_group_size = htab->params->group_size;
12307
12308 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12309 return FALSE;
12310
12311 #define STUB_SHRINK_ITER 20
12312 /* Loop until no stubs added. After iteration 20 of this loop we may
12313 exit on a stub section shrinking. This is to break out of a
12314 pathological case where adding stubs on one iteration decreases
12315 section gaps (perhaps due to alignment), which then requires
12316 fewer or smaller stubs on the next iteration. */
12317
12318 while (1)
12319 {
12320 bfd *input_bfd;
12321 unsigned int bfd_indx;
12322 struct map_stub *group;
12323
12324 htab->stub_iteration += 1;
12325
12326 for (input_bfd = info->input_bfds, bfd_indx = 0;
12327 input_bfd != NULL;
12328 input_bfd = input_bfd->link.next, bfd_indx++)
12329 {
12330 Elf_Internal_Shdr *symtab_hdr;
12331 asection *section;
12332 Elf_Internal_Sym *local_syms = NULL;
12333
12334 if (!is_ppc64_elf (input_bfd))
12335 continue;
12336
12337 /* We'll need the symbol table in a second. */
12338 symtab_hdr = &elf_symtab_hdr (input_bfd);
12339 if (symtab_hdr->sh_info == 0)
12340 continue;
12341
12342 /* Walk over each section attached to the input bfd. */
12343 for (section = input_bfd->sections;
12344 section != NULL;
12345 section = section->next)
12346 {
12347 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12348
12349 /* If there aren't any relocs, then there's nothing more
12350 to do. */
12351 if ((section->flags & SEC_RELOC) == 0
12352 || (section->flags & SEC_ALLOC) == 0
12353 || (section->flags & SEC_LOAD) == 0
12354 || (section->flags & SEC_CODE) == 0
12355 || section->reloc_count == 0)
12356 continue;
12357
12358 /* If this section is a link-once section that will be
12359 discarded, then don't create any stubs. */
12360 if (section->output_section == NULL
12361 || section->output_section->owner != info->output_bfd)
12362 continue;
12363
12364 /* Get the relocs. */
12365 internal_relocs
12366 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12367 info->keep_memory);
12368 if (internal_relocs == NULL)
12369 goto error_ret_free_local;
12370
12371 /* Now examine each relocation. */
12372 irela = internal_relocs;
12373 irelaend = irela + section->reloc_count;
12374 for (; irela < irelaend; irela++)
12375 {
12376 enum elf_ppc64_reloc_type r_type;
12377 unsigned int r_indx;
12378 enum ppc_stub_type stub_type;
12379 struct ppc_stub_hash_entry *stub_entry;
12380 asection *sym_sec, *code_sec;
12381 bfd_vma sym_value, code_value;
12382 bfd_vma destination;
12383 unsigned long local_off;
12384 bfd_boolean ok_dest;
12385 struct ppc_link_hash_entry *hash;
12386 struct ppc_link_hash_entry *fdh;
12387 struct elf_link_hash_entry *h;
12388 Elf_Internal_Sym *sym;
12389 char *stub_name;
12390 const asection *id_sec;
12391 struct _opd_sec_data *opd;
12392 struct plt_entry *plt_ent;
12393
12394 r_type = ELF64_R_TYPE (irela->r_info);
12395 r_indx = ELF64_R_SYM (irela->r_info);
12396
12397 if (r_type >= R_PPC64_max)
12398 {
12399 bfd_set_error (bfd_error_bad_value);
12400 goto error_ret_free_internal;
12401 }
12402
12403 /* Only look for stubs on branch instructions. */
12404 if (r_type != R_PPC64_REL24
12405 && r_type != R_PPC64_REL14
12406 && r_type != R_PPC64_REL14_BRTAKEN
12407 && r_type != R_PPC64_REL14_BRNTAKEN)
12408 continue;
12409
12410 /* Now determine the call target, its name, value,
12411 section. */
12412 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12413 r_indx, input_bfd))
12414 goto error_ret_free_internal;
12415 hash = (struct ppc_link_hash_entry *) h;
12416
12417 ok_dest = FALSE;
12418 fdh = NULL;
12419 sym_value = 0;
12420 if (hash == NULL)
12421 {
12422 sym_value = sym->st_value;
12423 if (sym_sec != NULL
12424 && sym_sec->output_section != NULL)
12425 ok_dest = TRUE;
12426 }
12427 else if (hash->elf.root.type == bfd_link_hash_defined
12428 || hash->elf.root.type == bfd_link_hash_defweak)
12429 {
12430 sym_value = hash->elf.root.u.def.value;
12431 if (sym_sec->output_section != NULL)
12432 ok_dest = TRUE;
12433 }
12434 else if (hash->elf.root.type == bfd_link_hash_undefweak
12435 || hash->elf.root.type == bfd_link_hash_undefined)
12436 {
12437 /* Recognise an old ABI func code entry sym, and
12438 use the func descriptor sym instead if it is
12439 defined. */
12440 if (hash->elf.root.root.string[0] == '.'
12441 && hash->oh != NULL)
12442 {
12443 fdh = ppc_follow_link (hash->oh);
12444 if (fdh->elf.root.type == bfd_link_hash_defined
12445 || fdh->elf.root.type == bfd_link_hash_defweak)
12446 {
12447 sym_sec = fdh->elf.root.u.def.section;
12448 sym_value = fdh->elf.root.u.def.value;
12449 if (sym_sec->output_section != NULL)
12450 ok_dest = TRUE;
12451 }
12452 else
12453 fdh = NULL;
12454 }
12455 }
12456 else
12457 {
12458 bfd_set_error (bfd_error_bad_value);
12459 goto error_ret_free_internal;
12460 }
12461
12462 destination = 0;
12463 local_off = 0;
12464 if (ok_dest)
12465 {
12466 sym_value += irela->r_addend;
12467 destination = (sym_value
12468 + sym_sec->output_offset
12469 + sym_sec->output_section->vma);
12470 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12471 ? hash->elf.other
12472 : sym->st_other);
12473 }
12474
12475 code_sec = sym_sec;
12476 code_value = sym_value;
12477 opd = get_opd_info (sym_sec);
12478 if (opd != NULL)
12479 {
12480 bfd_vma dest;
12481
12482 if (hash == NULL && opd->adjust != NULL)
12483 {
12484 long adjust = opd->adjust[OPD_NDX (sym_value)];
12485 if (adjust == -1)
12486 continue;
12487 code_value += adjust;
12488 sym_value += adjust;
12489 }
12490 dest = opd_entry_value (sym_sec, sym_value,
12491 &code_sec, &code_value, FALSE);
12492 if (dest != (bfd_vma) -1)
12493 {
12494 destination = dest;
12495 if (fdh != NULL)
12496 {
12497 /* Fixup old ABI sym to point at code
12498 entry. */
12499 hash->elf.root.type = bfd_link_hash_defweak;
12500 hash->elf.root.u.def.section = code_sec;
12501 hash->elf.root.u.def.value = code_value;
12502 }
12503 }
12504 }
12505
12506 /* Determine what (if any) linker stub is needed. */
12507 plt_ent = NULL;
12508 stub_type = ppc_type_of_stub (section, irela, &hash,
12509 &plt_ent, destination,
12510 local_off);
12511
12512 if (stub_type != ppc_stub_plt_call)
12513 {
12514 /* Check whether we need a TOC adjusting stub.
12515 Since the linker pastes together pieces from
12516 different object files when creating the
12517 _init and _fini functions, it may be that a
12518 call to what looks like a local sym is in
12519 fact a call needing a TOC adjustment. */
12520 if (code_sec != NULL
12521 && code_sec->output_section != NULL
12522 && (htab->sec_info[code_sec->id].toc_off
12523 != htab->sec_info[section->id].toc_off)
12524 && (code_sec->has_toc_reloc
12525 || code_sec->makes_toc_func_call))
12526 stub_type = ppc_stub_long_branch_r2off;
12527 }
12528
12529 if (stub_type == ppc_stub_none)
12530 continue;
12531
12532 /* __tls_get_addr calls might be eliminated. */
12533 if (stub_type != ppc_stub_plt_call
12534 && hash != NULL
12535 && (hash == htab->tls_get_addr
12536 || hash == htab->tls_get_addr_fd)
12537 && section->has_tls_reloc
12538 && irela != internal_relocs)
12539 {
12540 /* Get tls info. */
12541 unsigned char *tls_mask;
12542
12543 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12544 irela - 1, input_bfd))
12545 goto error_ret_free_internal;
12546 if (*tls_mask != 0)
12547 continue;
12548 }
12549
12550 if (stub_type == ppc_stub_plt_call)
12551 {
12552 if (!htab->opd_abi
12553 && htab->params->plt_localentry0 != 0
12554 && is_elfv2_localentry0 (&hash->elf))
12555 htab->has_plt_localentry0 = 1;
12556 else if (irela + 1 < irelaend
12557 && irela[1].r_offset == irela->r_offset + 4
12558 && (ELF64_R_TYPE (irela[1].r_info)
12559 == R_PPC64_TOCSAVE))
12560 {
12561 if (!tocsave_find (htab, INSERT,
12562 &local_syms, irela + 1, input_bfd))
12563 goto error_ret_free_internal;
12564 }
12565 else
12566 stub_type = ppc_stub_plt_call_r2save;
12567 }
12568
12569 /* Support for grouping stub sections. */
12570 id_sec = htab->sec_info[section->id].u.group->link_sec;
12571
12572 /* Get the name of this stub. */
12573 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12574 if (!stub_name)
12575 goto error_ret_free_internal;
12576
12577 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12578 stub_name, FALSE, FALSE);
12579 if (stub_entry != NULL)
12580 {
12581 /* The proper stub has already been created. */
12582 free (stub_name);
12583 if (stub_type == ppc_stub_plt_call_r2save)
12584 stub_entry->stub_type = stub_type;
12585 continue;
12586 }
12587
12588 stub_entry = ppc_add_stub (stub_name, section, info);
12589 if (stub_entry == NULL)
12590 {
12591 free (stub_name);
12592 error_ret_free_internal:
12593 if (elf_section_data (section)->relocs == NULL)
12594 free (internal_relocs);
12595 error_ret_free_local:
12596 if (local_syms != NULL
12597 && (symtab_hdr->contents
12598 != (unsigned char *) local_syms))
12599 free (local_syms);
12600 return FALSE;
12601 }
12602
12603 stub_entry->stub_type = stub_type;
12604 if (stub_type != ppc_stub_plt_call
12605 && stub_type != ppc_stub_plt_call_r2save)
12606 {
12607 stub_entry->target_value = code_value;
12608 stub_entry->target_section = code_sec;
12609 }
12610 else
12611 {
12612 stub_entry->target_value = sym_value;
12613 stub_entry->target_section = sym_sec;
12614 }
12615 stub_entry->h = hash;
12616 stub_entry->plt_ent = plt_ent;
12617 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12618
12619 if (stub_entry->h != NULL)
12620 htab->stub_globals += 1;
12621 }
12622
12623 /* We're done with the internal relocs, free them. */
12624 if (elf_section_data (section)->relocs != internal_relocs)
12625 free (internal_relocs);
12626 }
12627
12628 if (local_syms != NULL
12629 && symtab_hdr->contents != (unsigned char *) local_syms)
12630 {
12631 if (!info->keep_memory)
12632 free (local_syms);
12633 else
12634 symtab_hdr->contents = (unsigned char *) local_syms;
12635 }
12636 }
12637
12638 /* We may have added some stubs. Find out the new size of the
12639 stub sections. */
12640 for (group = htab->group; group != NULL; group = group->next)
12641 if (group->stub_sec != NULL)
12642 {
12643 asection *stub_sec = group->stub_sec;
12644
12645 if (htab->stub_iteration <= STUB_SHRINK_ITER
12646 || stub_sec->rawsize < stub_sec->size)
12647 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12648 stub_sec->rawsize = stub_sec->size;
12649 stub_sec->size = 0;
12650 stub_sec->reloc_count = 0;
12651 stub_sec->flags &= ~SEC_RELOC;
12652 }
12653
12654 htab->brlt->size = 0;
12655 htab->brlt->reloc_count = 0;
12656 htab->brlt->flags &= ~SEC_RELOC;
12657 if (htab->relbrlt != NULL)
12658 htab->relbrlt->size = 0;
12659
12660 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12661
12662 for (group = htab->group; group != NULL; group = group->next)
12663 if (group->needs_save_res)
12664 group->stub_sec->size += htab->sfpr->size;
12665
12666 if (info->emitrelocations
12667 && htab->glink != NULL && htab->glink->size != 0)
12668 {
12669 htab->glink->reloc_count = 1;
12670 htab->glink->flags |= SEC_RELOC;
12671 }
12672
12673 if (htab->glink_eh_frame != NULL
12674 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12675 && htab->glink_eh_frame->output_section->size > 8)
12676 {
12677 size_t size = 0, align = 4;
12678
12679 for (group = htab->group; group != NULL; group = group->next)
12680 if (group->stub_sec != NULL)
12681 size += stub_eh_frame_size (group, align);
12682 if (htab->glink != NULL && htab->glink->size != 0)
12683 size += (24 + align - 1) & -align;
12684 if (size != 0)
12685 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12686 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12687 size = (size + align - 1) & -align;
12688 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12689 htab->glink_eh_frame->size = size;
12690 }
12691
12692 if (htab->params->plt_stub_align != 0)
12693 for (group = htab->group; group != NULL; group = group->next)
12694 if (group->stub_sec != NULL)
12695 group->stub_sec->size = ((group->stub_sec->size
12696 + (1 << htab->params->plt_stub_align) - 1)
12697 & -(1 << htab->params->plt_stub_align));
12698
12699 for (group = htab->group; group != NULL; group = group->next)
12700 if (group->stub_sec != NULL
12701 && group->stub_sec->rawsize != group->stub_sec->size
12702 && (htab->stub_iteration <= STUB_SHRINK_ITER
12703 || group->stub_sec->rawsize < group->stub_sec->size))
12704 break;
12705
12706 if (group == NULL
12707 && (htab->glink_eh_frame == NULL
12708 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12709 break;
12710
12711 /* Ask the linker to do its stuff. */
12712 (*htab->params->layout_sections_again) ();
12713 }
12714
12715 if (htab->glink_eh_frame != NULL
12716 && htab->glink_eh_frame->size != 0)
12717 {
12718 bfd_vma val;
12719 bfd_byte *p, *last_fde;
12720 size_t last_fde_len, size, align, pad;
12721 struct map_stub *group;
12722
12723 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12724 if (p == NULL)
12725 return FALSE;
12726 htab->glink_eh_frame->contents = p;
12727 last_fde = p;
12728 align = 4;
12729
12730 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12731 /* CIE length (rewrite in case little-endian). */
12732 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12733 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12734 p += last_fde_len + 4;
12735
12736 for (group = htab->group; group != NULL; group = group->next)
12737 if (group->stub_sec != NULL)
12738 {
12739 last_fde = p;
12740 last_fde_len = stub_eh_frame_size (group, align) - 4;
12741 /* FDE length. */
12742 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12743 p += 4;
12744 /* CIE pointer. */
12745 val = p - htab->glink_eh_frame->contents;
12746 bfd_put_32 (htab->elf.dynobj, val, p);
12747 p += 4;
12748 /* Offset to stub section, written later. */
12749 p += 4;
12750 /* stub section size. */
12751 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12752 p += 4;
12753 /* Augmentation. */
12754 p += 1;
12755 if (group->tls_get_addr_opt_bctrl != -1u)
12756 {
12757 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12758
12759 /* This FDE needs more than just the default.
12760 Describe __tls_get_addr_opt stub LR. */
12761 if (to_bctrl < 64)
12762 *p++ = DW_CFA_advance_loc + to_bctrl;
12763 else if (to_bctrl < 256)
12764 {
12765 *p++ = DW_CFA_advance_loc1;
12766 *p++ = to_bctrl;
12767 }
12768 else if (to_bctrl < 65536)
12769 {
12770 *p++ = DW_CFA_advance_loc2;
12771 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12772 p += 2;
12773 }
12774 else
12775 {
12776 *p++ = DW_CFA_advance_loc4;
12777 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12778 p += 4;
12779 }
12780 *p++ = DW_CFA_offset_extended_sf;
12781 *p++ = 65;
12782 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12783 *p++ = DW_CFA_advance_loc + 4;
12784 *p++ = DW_CFA_restore_extended;
12785 *p++ = 65;
12786 }
12787 /* Pad. */
12788 p = last_fde + last_fde_len + 4;
12789 }
12790 if (htab->glink != NULL && htab->glink->size != 0)
12791 {
12792 last_fde = p;
12793 last_fde_len = ((24 + align - 1) & -align) - 4;
12794 /* FDE length. */
12795 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12796 p += 4;
12797 /* CIE pointer. */
12798 val = p - htab->glink_eh_frame->contents;
12799 bfd_put_32 (htab->elf.dynobj, val, p);
12800 p += 4;
12801 /* Offset to .glink, written later. */
12802 p += 4;
12803 /* .glink size. */
12804 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12805 p += 4;
12806 /* Augmentation. */
12807 p += 1;
12808
12809 *p++ = DW_CFA_advance_loc + 1;
12810 *p++ = DW_CFA_register;
12811 *p++ = 65;
12812 *p++ = htab->opd_abi ? 12 : 0;
12813 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12814 *p++ = DW_CFA_restore_extended;
12815 *p++ = 65;
12816 p += ((24 + align - 1) & -align) - 24;
12817 }
12818 /* Subsume any padding into the last FDE if user .eh_frame
12819 sections are aligned more than glink_eh_frame. Otherwise any
12820 zero padding will be seen as a terminator. */
12821 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12822 size = p - htab->glink_eh_frame->contents;
12823 pad = ((size + align - 1) & -align) - size;
12824 htab->glink_eh_frame->size = size + pad;
12825 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12826 }
12827
12828 maybe_strip_output (info, htab->brlt);
12829 if (htab->glink_eh_frame != NULL)
12830 maybe_strip_output (info, htab->glink_eh_frame);
12831
12832 return TRUE;
12833 }
12834
12835 /* Called after we have determined section placement. If sections
12836 move, we'll be called again. Provide a value for TOCstart. */
12837
12838 bfd_vma
12839 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12840 {
12841 asection *s;
12842 bfd_vma TOCstart, adjust;
12843
12844 if (info != NULL)
12845 {
12846 struct elf_link_hash_entry *h;
12847 struct elf_link_hash_table *htab = elf_hash_table (info);
12848
12849 if (is_elf_hash_table (htab)
12850 && htab->hgot != NULL)
12851 h = htab->hgot;
12852 else
12853 {
12854 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12855 if (is_elf_hash_table (htab))
12856 htab->hgot = h;
12857 }
12858 if (h != NULL
12859 && h->root.type == bfd_link_hash_defined
12860 && !h->root.linker_def
12861 && (!is_elf_hash_table (htab)
12862 || h->def_regular))
12863 {
12864 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12865 + h->root.u.def.section->output_offset
12866 + h->root.u.def.section->output_section->vma);
12867 _bfd_set_gp_value (obfd, TOCstart);
12868 return TOCstart;
12869 }
12870 }
12871
12872 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12873 order. The TOC starts where the first of these sections starts. */
12874 s = bfd_get_section_by_name (obfd, ".got");
12875 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12876 s = bfd_get_section_by_name (obfd, ".toc");
12877 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12878 s = bfd_get_section_by_name (obfd, ".tocbss");
12879 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12880 s = bfd_get_section_by_name (obfd, ".plt");
12881 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12882 {
12883 /* This may happen for
12884 o references to TOC base (SYM@toc / TOC[tc0]) without a
12885 .toc directive
12886 o bad linker script
12887 o --gc-sections and empty TOC sections
12888
12889 FIXME: Warn user? */
12890
12891 /* Look for a likely section. We probably won't even be
12892 using TOCstart. */
12893 for (s = obfd->sections; s != NULL; s = s->next)
12894 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12895 | SEC_EXCLUDE))
12896 == (SEC_ALLOC | SEC_SMALL_DATA))
12897 break;
12898 if (s == NULL)
12899 for (s = obfd->sections; s != NULL; s = s->next)
12900 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12901 == (SEC_ALLOC | SEC_SMALL_DATA))
12902 break;
12903 if (s == NULL)
12904 for (s = obfd->sections; s != NULL; s = s->next)
12905 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12906 == SEC_ALLOC)
12907 break;
12908 if (s == NULL)
12909 for (s = obfd->sections; s != NULL; s = s->next)
12910 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12911 break;
12912 }
12913
12914 TOCstart = 0;
12915 if (s != NULL)
12916 TOCstart = s->output_section->vma + s->output_offset;
12917
12918 /* Force alignment. */
12919 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12920 TOCstart -= adjust;
12921 _bfd_set_gp_value (obfd, TOCstart);
12922
12923 if (info != NULL && s != NULL)
12924 {
12925 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12926
12927 if (htab != NULL)
12928 {
12929 if (htab->elf.hgot != NULL)
12930 {
12931 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12932 htab->elf.hgot->root.u.def.section = s;
12933 }
12934 }
12935 else
12936 {
12937 struct bfd_link_hash_entry *bh = NULL;
12938 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12939 s, TOC_BASE_OFF - adjust,
12940 NULL, FALSE, FALSE, &bh);
12941 }
12942 }
12943 return TOCstart;
12944 }
12945
12946 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12947 write out any global entry stubs. */
12948
12949 static bfd_boolean
12950 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12951 {
12952 struct bfd_link_info *info;
12953 struct ppc_link_hash_table *htab;
12954 struct plt_entry *pent;
12955 asection *s;
12956
12957 if (h->root.type == bfd_link_hash_indirect)
12958 return TRUE;
12959
12960 if (!h->pointer_equality_needed)
12961 return TRUE;
12962
12963 if (h->def_regular)
12964 return TRUE;
12965
12966 info = inf;
12967 htab = ppc_hash_table (info);
12968 if (htab == NULL)
12969 return FALSE;
12970
12971 s = htab->glink;
12972 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12973 if (pent->plt.offset != (bfd_vma) -1
12974 && pent->addend == 0)
12975 {
12976 bfd_byte *p;
12977 asection *plt;
12978 bfd_vma off;
12979
12980 p = s->contents + h->root.u.def.value;
12981 plt = htab->elf.splt;
12982 if (!htab->elf.dynamic_sections_created
12983 || h->dynindx == -1)
12984 plt = htab->elf.iplt;
12985 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12986 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12987
12988 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12989 {
12990 info->callbacks->einfo
12991 (_("%P: linkage table error against `%T'\n"),
12992 h->root.root.string);
12993 bfd_set_error (bfd_error_bad_value);
12994 htab->stub_error = TRUE;
12995 }
12996
12997 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12998 if (htab->params->emit_stub_syms)
12999 {
13000 size_t len = strlen (h->root.root.string);
13001 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13002
13003 if (name == NULL)
13004 return FALSE;
13005
13006 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13007 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13008 if (h == NULL)
13009 return FALSE;
13010 if (h->root.type == bfd_link_hash_new)
13011 {
13012 h->root.type = bfd_link_hash_defined;
13013 h->root.u.def.section = s;
13014 h->root.u.def.value = p - s->contents;
13015 h->ref_regular = 1;
13016 h->def_regular = 1;
13017 h->ref_regular_nonweak = 1;
13018 h->forced_local = 1;
13019 h->non_elf = 0;
13020 h->root.linker_def = 1;
13021 }
13022 }
13023
13024 if (PPC_HA (off) != 0)
13025 {
13026 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13027 p += 4;
13028 }
13029 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13030 p += 4;
13031 bfd_put_32 (s->owner, MTCTR_R12, p);
13032 p += 4;
13033 bfd_put_32 (s->owner, BCTR, p);
13034 break;
13035 }
13036 return TRUE;
13037 }
13038
13039 /* Build all the stubs associated with the current output file.
13040 The stubs are kept in a hash table attached to the main linker
13041 hash table. This function is called via gldelf64ppc_finish. */
13042
13043 bfd_boolean
13044 ppc64_elf_build_stubs (struct bfd_link_info *info,
13045 char **stats)
13046 {
13047 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13048 struct map_stub *group;
13049 asection *stub_sec;
13050 bfd_byte *p;
13051 int stub_sec_count = 0;
13052
13053 if (htab == NULL)
13054 return FALSE;
13055
13056 /* Allocate memory to hold the linker stubs. */
13057 for (group = htab->group; group != NULL; group = group->next)
13058 if ((stub_sec = group->stub_sec) != NULL
13059 && stub_sec->size != 0)
13060 {
13061 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13062 if (stub_sec->contents == NULL)
13063 return FALSE;
13064 stub_sec->size = 0;
13065 }
13066
13067 if (htab->glink != NULL && htab->glink->size != 0)
13068 {
13069 unsigned int indx;
13070 bfd_vma plt0;
13071
13072 /* Build the .glink plt call stub. */
13073 if (htab->params->emit_stub_syms)
13074 {
13075 struct elf_link_hash_entry *h;
13076 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13077 TRUE, FALSE, FALSE);
13078 if (h == NULL)
13079 return FALSE;
13080 if (h->root.type == bfd_link_hash_new)
13081 {
13082 h->root.type = bfd_link_hash_defined;
13083 h->root.u.def.section = htab->glink;
13084 h->root.u.def.value = 8;
13085 h->ref_regular = 1;
13086 h->def_regular = 1;
13087 h->ref_regular_nonweak = 1;
13088 h->forced_local = 1;
13089 h->non_elf = 0;
13090 h->root.linker_def = 1;
13091 }
13092 }
13093 plt0 = (htab->elf.splt->output_section->vma
13094 + htab->elf.splt->output_offset
13095 - 16);
13096 if (info->emitrelocations)
13097 {
13098 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13099 if (r == NULL)
13100 return FALSE;
13101 r->r_offset = (htab->glink->output_offset
13102 + htab->glink->output_section->vma);
13103 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13104 r->r_addend = plt0;
13105 }
13106 p = htab->glink->contents;
13107 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13108 bfd_put_64 (htab->glink->owner, plt0, p);
13109 p += 8;
13110 if (htab->opd_abi)
13111 {
13112 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13113 p += 4;
13114 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13115 p += 4;
13116 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13117 p += 4;
13118 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13119 p += 4;
13120 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13121 p += 4;
13122 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13123 p += 4;
13124 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13125 p += 4;
13126 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13127 p += 4;
13128 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13129 p += 4;
13130 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13131 p += 4;
13132 }
13133 else
13134 {
13135 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13136 p += 4;
13137 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13138 p += 4;
13139 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13140 p += 4;
13141 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13142 p += 4;
13143 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13144 p += 4;
13145 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13146 p += 4;
13147 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13148 p += 4;
13149 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13150 p += 4;
13151 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13152 p += 4;
13153 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13154 p += 4;
13155 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13156 p += 4;
13157 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13158 p += 4;
13159 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13160 p += 4;
13161 }
13162 bfd_put_32 (htab->glink->owner, BCTR, p);
13163 p += 4;
13164 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13165 {
13166 bfd_put_32 (htab->glink->owner, NOP, p);
13167 p += 4;
13168 }
13169
13170 /* Build the .glink lazy link call stubs. */
13171 indx = 0;
13172 while (p < htab->glink->contents + htab->glink->rawsize)
13173 {
13174 if (htab->opd_abi)
13175 {
13176 if (indx < 0x8000)
13177 {
13178 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13179 p += 4;
13180 }
13181 else
13182 {
13183 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13184 p += 4;
13185 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13186 p);
13187 p += 4;
13188 }
13189 }
13190 bfd_put_32 (htab->glink->owner,
13191 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13192 indx++;
13193 p += 4;
13194 }
13195
13196 /* Build .glink global entry stubs. */
13197 if (htab->glink->size > htab->glink->rawsize)
13198 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13199 }
13200
13201 if (htab->brlt != NULL && htab->brlt->size != 0)
13202 {
13203 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13204 htab->brlt->size);
13205 if (htab->brlt->contents == NULL)
13206 return FALSE;
13207 }
13208 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13209 {
13210 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13211 htab->relbrlt->size);
13212 if (htab->relbrlt->contents == NULL)
13213 return FALSE;
13214 }
13215
13216 /* Build the stubs as directed by the stub hash table. */
13217 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13218
13219 for (group = htab->group; group != NULL; group = group->next)
13220 if (group->needs_save_res)
13221 {
13222 stub_sec = group->stub_sec;
13223 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13224 htab->sfpr->size);
13225 if (htab->params->emit_stub_syms)
13226 {
13227 unsigned int i;
13228
13229 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13230 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13231 return FALSE;
13232 }
13233 stub_sec->size += htab->sfpr->size;
13234 }
13235
13236 if (htab->relbrlt != NULL)
13237 htab->relbrlt->reloc_count = 0;
13238
13239 if (htab->params->plt_stub_align != 0)
13240 for (group = htab->group; group != NULL; group = group->next)
13241 if ((stub_sec = group->stub_sec) != NULL)
13242 stub_sec->size = ((stub_sec->size
13243 + (1 << htab->params->plt_stub_align) - 1)
13244 & -(1 << htab->params->plt_stub_align));
13245
13246 for (group = htab->group; group != NULL; group = group->next)
13247 if ((stub_sec = group->stub_sec) != NULL)
13248 {
13249 stub_sec_count += 1;
13250 if (stub_sec->rawsize != stub_sec->size
13251 && (htab->stub_iteration <= STUB_SHRINK_ITER
13252 || stub_sec->rawsize < stub_sec->size))
13253 break;
13254 }
13255
13256 if (group != NULL)
13257 {
13258 htab->stub_error = TRUE;
13259 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13260 }
13261
13262 if (htab->stub_error)
13263 return FALSE;
13264
13265 if (stats != NULL)
13266 {
13267 size_t len;
13268 *stats = bfd_malloc (500);
13269 if (*stats == NULL)
13270 return FALSE;
13271
13272 len = sprintf (*stats,
13273 ngettext ("linker stubs in %u group\n",
13274 "linker stubs in %u groups\n",
13275 stub_sec_count),
13276 stub_sec_count);
13277 sprintf (*stats + len, _(" branch %lu\n"
13278 " toc adjust %lu\n"
13279 " long branch %lu\n"
13280 " long toc adj %lu\n"
13281 " plt call %lu\n"
13282 " plt call toc %lu\n"
13283 " global entry %lu"),
13284 htab->stub_count[ppc_stub_long_branch - 1],
13285 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13286 htab->stub_count[ppc_stub_plt_branch - 1],
13287 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13288 htab->stub_count[ppc_stub_plt_call - 1],
13289 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13290 htab->stub_count[ppc_stub_global_entry - 1]);
13291 }
13292 return TRUE;
13293 }
13294
13295 /* What to do when ld finds relocations against symbols defined in
13296 discarded sections. */
13297
13298 static unsigned int
13299 ppc64_elf_action_discarded (asection *sec)
13300 {
13301 if (strcmp (".opd", sec->name) == 0)
13302 return 0;
13303
13304 if (strcmp (".toc", sec->name) == 0)
13305 return 0;
13306
13307 if (strcmp (".toc1", sec->name) == 0)
13308 return 0;
13309
13310 return _bfd_elf_default_action_discarded (sec);
13311 }
13312
13313 /* The RELOCATE_SECTION function is called by the ELF backend linker
13314 to handle the relocations for a section.
13315
13316 The relocs are always passed as Rela structures; if the section
13317 actually uses Rel structures, the r_addend field will always be
13318 zero.
13319
13320 This function is responsible for adjust the section contents as
13321 necessary, and (if using Rela relocs and generating a
13322 relocatable output file) adjusting the reloc addend as
13323 necessary.
13324
13325 This function does not have to worry about setting the reloc
13326 address or the reloc symbol index.
13327
13328 LOCAL_SYMS is a pointer to the swapped in local symbols.
13329
13330 LOCAL_SECTIONS is an array giving the section in the input file
13331 corresponding to the st_shndx field of each local symbol.
13332
13333 The global hash table entry for the global symbols can be found
13334 via elf_sym_hashes (input_bfd).
13335
13336 When generating relocatable output, this function must handle
13337 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13338 going to be the section symbol corresponding to the output
13339 section, which means that the addend must be adjusted
13340 accordingly. */
13341
13342 static bfd_boolean
13343 ppc64_elf_relocate_section (bfd *output_bfd,
13344 struct bfd_link_info *info,
13345 bfd *input_bfd,
13346 asection *input_section,
13347 bfd_byte *contents,
13348 Elf_Internal_Rela *relocs,
13349 Elf_Internal_Sym *local_syms,
13350 asection **local_sections)
13351 {
13352 struct ppc_link_hash_table *htab;
13353 Elf_Internal_Shdr *symtab_hdr;
13354 struct elf_link_hash_entry **sym_hashes;
13355 Elf_Internal_Rela *rel;
13356 Elf_Internal_Rela *wrel;
13357 Elf_Internal_Rela *relend;
13358 Elf_Internal_Rela outrel;
13359 bfd_byte *loc;
13360 struct got_entry **local_got_ents;
13361 bfd_vma TOCstart;
13362 bfd_boolean ret = TRUE;
13363 bfd_boolean is_opd;
13364 /* Assume 'at' branch hints. */
13365 bfd_boolean is_isa_v2 = TRUE;
13366 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13367
13368 /* Initialize howto table if needed. */
13369 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13370 ppc_howto_init ();
13371
13372 htab = ppc_hash_table (info);
13373 if (htab == NULL)
13374 return FALSE;
13375
13376 /* Don't relocate stub sections. */
13377 if (input_section->owner == htab->params->stub_bfd)
13378 return TRUE;
13379
13380 BFD_ASSERT (is_ppc64_elf (input_bfd));
13381
13382 local_got_ents = elf_local_got_ents (input_bfd);
13383 TOCstart = elf_gp (output_bfd);
13384 symtab_hdr = &elf_symtab_hdr (input_bfd);
13385 sym_hashes = elf_sym_hashes (input_bfd);
13386 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13387
13388 rel = wrel = relocs;
13389 relend = relocs + input_section->reloc_count;
13390 for (; rel < relend; wrel++, rel++)
13391 {
13392 enum elf_ppc64_reloc_type r_type;
13393 bfd_vma addend;
13394 bfd_reloc_status_type r;
13395 Elf_Internal_Sym *sym;
13396 asection *sec;
13397 struct elf_link_hash_entry *h_elf;
13398 struct ppc_link_hash_entry *h;
13399 struct ppc_link_hash_entry *fdh;
13400 const char *sym_name;
13401 unsigned long r_symndx, toc_symndx;
13402 bfd_vma toc_addend;
13403 unsigned char tls_mask, tls_gd, tls_type;
13404 unsigned char sym_type;
13405 bfd_vma relocation;
13406 bfd_boolean unresolved_reloc;
13407 bfd_boolean warned;
13408 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13409 unsigned int insn;
13410 unsigned int mask;
13411 struct ppc_stub_hash_entry *stub_entry;
13412 bfd_vma max_br_offset;
13413 bfd_vma from;
13414 Elf_Internal_Rela orig_rel;
13415 reloc_howto_type *howto;
13416 struct reloc_howto_struct alt_howto;
13417
13418 again:
13419 orig_rel = *rel;
13420
13421 r_type = ELF64_R_TYPE (rel->r_info);
13422 r_symndx = ELF64_R_SYM (rel->r_info);
13423
13424 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13425 symbol of the previous ADDR64 reloc. The symbol gives us the
13426 proper TOC base to use. */
13427 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13428 && wrel != relocs
13429 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13430 && is_opd)
13431 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13432
13433 sym = NULL;
13434 sec = NULL;
13435 h_elf = NULL;
13436 sym_name = NULL;
13437 unresolved_reloc = FALSE;
13438 warned = FALSE;
13439
13440 if (r_symndx < symtab_hdr->sh_info)
13441 {
13442 /* It's a local symbol. */
13443 struct _opd_sec_data *opd;
13444
13445 sym = local_syms + r_symndx;
13446 sec = local_sections[r_symndx];
13447 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13448 sym_type = ELF64_ST_TYPE (sym->st_info);
13449 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13450 opd = get_opd_info (sec);
13451 if (opd != NULL && opd->adjust != NULL)
13452 {
13453 long adjust = opd->adjust[OPD_NDX (sym->st_value
13454 + rel->r_addend)];
13455 if (adjust == -1)
13456 relocation = 0;
13457 else
13458 {
13459 /* If this is a relocation against the opd section sym
13460 and we have edited .opd, adjust the reloc addend so
13461 that ld -r and ld --emit-relocs output is correct.
13462 If it is a reloc against some other .opd symbol,
13463 then the symbol value will be adjusted later. */
13464 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13465 rel->r_addend += adjust;
13466 else
13467 relocation += adjust;
13468 }
13469 }
13470 }
13471 else
13472 {
13473 bfd_boolean ignored;
13474
13475 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13476 r_symndx, symtab_hdr, sym_hashes,
13477 h_elf, sec, relocation,
13478 unresolved_reloc, warned, ignored);
13479 sym_name = h_elf->root.root.string;
13480 sym_type = h_elf->type;
13481 if (sec != NULL
13482 && sec->owner == output_bfd
13483 && strcmp (sec->name, ".opd") == 0)
13484 {
13485 /* This is a symbol defined in a linker script. All
13486 such are defined in output sections, even those
13487 defined by simple assignment from a symbol defined in
13488 an input section. Transfer the symbol to an
13489 appropriate input .opd section, so that a branch to
13490 this symbol will be mapped to the location specified
13491 by the opd entry. */
13492 struct bfd_link_order *lo;
13493 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13494 if (lo->type == bfd_indirect_link_order)
13495 {
13496 asection *isec = lo->u.indirect.section;
13497 if (h_elf->root.u.def.value >= isec->output_offset
13498 && h_elf->root.u.def.value < (isec->output_offset
13499 + isec->size))
13500 {
13501 h_elf->root.u.def.value -= isec->output_offset;
13502 h_elf->root.u.def.section = isec;
13503 sec = isec;
13504 break;
13505 }
13506 }
13507 }
13508 }
13509 h = (struct ppc_link_hash_entry *) h_elf;
13510
13511 if (sec != NULL && discarded_section (sec))
13512 {
13513 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13514 input_bfd, input_section,
13515 contents + rel->r_offset);
13516 wrel->r_offset = rel->r_offset;
13517 wrel->r_info = 0;
13518 wrel->r_addend = 0;
13519
13520 /* For ld -r, remove relocations in debug sections against
13521 symbols defined in discarded sections. Not done for
13522 non-debug to preserve relocs in .eh_frame which the
13523 eh_frame editing code expects to be present. */
13524 if (bfd_link_relocatable (info)
13525 && (input_section->flags & SEC_DEBUGGING))
13526 wrel--;
13527
13528 continue;
13529 }
13530
13531 if (bfd_link_relocatable (info))
13532 goto copy_reloc;
13533
13534 if (h != NULL && &h->elf == htab->elf.hgot)
13535 {
13536 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13537 sec = bfd_abs_section_ptr;
13538 unresolved_reloc = FALSE;
13539 }
13540
13541 /* TLS optimizations. Replace instruction sequences and relocs
13542 based on information we collected in tls_optimize. We edit
13543 RELOCS so that --emit-relocs will output something sensible
13544 for the final instruction stream. */
13545 tls_mask = 0;
13546 tls_gd = 0;
13547 toc_symndx = 0;
13548 if (h != NULL)
13549 tls_mask = h->tls_mask;
13550 else if (local_got_ents != NULL)
13551 {
13552 struct plt_entry **local_plt = (struct plt_entry **)
13553 (local_got_ents + symtab_hdr->sh_info);
13554 unsigned char *lgot_masks = (unsigned char *)
13555 (local_plt + symtab_hdr->sh_info);
13556 tls_mask = lgot_masks[r_symndx];
13557 }
13558 if (tls_mask == 0
13559 && (r_type == R_PPC64_TLS
13560 || r_type == R_PPC64_TLSGD
13561 || r_type == R_PPC64_TLSLD))
13562 {
13563 /* Check for toc tls entries. */
13564 unsigned char *toc_tls;
13565
13566 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13567 &local_syms, rel, input_bfd))
13568 return FALSE;
13569
13570 if (toc_tls)
13571 tls_mask = *toc_tls;
13572 }
13573
13574 /* Check that tls relocs are used with tls syms, and non-tls
13575 relocs are used with non-tls syms. */
13576 if (r_symndx != STN_UNDEF
13577 && r_type != R_PPC64_NONE
13578 && (h == NULL
13579 || h->elf.root.type == bfd_link_hash_defined
13580 || h->elf.root.type == bfd_link_hash_defweak)
13581 && (IS_PPC64_TLS_RELOC (r_type)
13582 != (sym_type == STT_TLS
13583 || (sym_type == STT_SECTION
13584 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13585 {
13586 if (tls_mask != 0
13587 && (r_type == R_PPC64_TLS
13588 || r_type == R_PPC64_TLSGD
13589 || r_type == R_PPC64_TLSLD))
13590 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13591 ;
13592 else
13593 info->callbacks->einfo
13594 (!IS_PPC64_TLS_RELOC (r_type)
13595 /* xgettext:c-format */
13596 ? _("%H: %s used with TLS symbol `%T'\n")
13597 /* xgettext:c-format */
13598 : _("%H: %s used with non-TLS symbol `%T'\n"),
13599 input_bfd, input_section, rel->r_offset,
13600 ppc64_elf_howto_table[r_type]->name,
13601 sym_name);
13602 }
13603
13604 /* Ensure reloc mapping code below stays sane. */
13605 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13606 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13607 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13608 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13609 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13610 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13611 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13612 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13613 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13614 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13615 abort ();
13616
13617 switch (r_type)
13618 {
13619 default:
13620 break;
13621
13622 case R_PPC64_LO_DS_OPT:
13623 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13624 if ((insn & (0x3f << 26)) != 58u << 26)
13625 abort ();
13626 insn += (14u << 26) - (58u << 26);
13627 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13628 r_type = R_PPC64_TOC16_LO;
13629 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13630 break;
13631
13632 case R_PPC64_TOC16:
13633 case R_PPC64_TOC16_LO:
13634 case R_PPC64_TOC16_DS:
13635 case R_PPC64_TOC16_LO_DS:
13636 {
13637 /* Check for toc tls entries. */
13638 unsigned char *toc_tls;
13639 int retval;
13640
13641 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13642 &local_syms, rel, input_bfd);
13643 if (retval == 0)
13644 return FALSE;
13645
13646 if (toc_tls)
13647 {
13648 tls_mask = *toc_tls;
13649 if (r_type == R_PPC64_TOC16_DS
13650 || r_type == R_PPC64_TOC16_LO_DS)
13651 {
13652 if (tls_mask != 0
13653 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13654 goto toctprel;
13655 }
13656 else
13657 {
13658 /* If we found a GD reloc pair, then we might be
13659 doing a GD->IE transition. */
13660 if (retval == 2)
13661 {
13662 tls_gd = TLS_TPRELGD;
13663 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13664 goto tls_ldgd_opt;
13665 }
13666 else if (retval == 3)
13667 {
13668 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13669 goto tls_ldgd_opt;
13670 }
13671 }
13672 }
13673 }
13674 break;
13675
13676 case R_PPC64_GOT_TPREL16_HI:
13677 case R_PPC64_GOT_TPREL16_HA:
13678 if (tls_mask != 0
13679 && (tls_mask & TLS_TPREL) == 0)
13680 {
13681 rel->r_offset -= d_offset;
13682 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13683 r_type = R_PPC64_NONE;
13684 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13685 }
13686 break;
13687
13688 case R_PPC64_GOT_TPREL16_DS:
13689 case R_PPC64_GOT_TPREL16_LO_DS:
13690 if (tls_mask != 0
13691 && (tls_mask & TLS_TPREL) == 0)
13692 {
13693 toctprel:
13694 insn = bfd_get_32 (input_bfd,
13695 contents + rel->r_offset - d_offset);
13696 insn &= 31 << 21;
13697 insn |= 0x3c0d0000; /* addis 0,13,0 */
13698 bfd_put_32 (input_bfd, insn,
13699 contents + rel->r_offset - d_offset);
13700 r_type = R_PPC64_TPREL16_HA;
13701 if (toc_symndx != 0)
13702 {
13703 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13704 rel->r_addend = toc_addend;
13705 /* We changed the symbol. Start over in order to
13706 get h, sym, sec etc. right. */
13707 goto again;
13708 }
13709 else
13710 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13711 }
13712 break;
13713
13714 case R_PPC64_TLS:
13715 if (tls_mask != 0
13716 && (tls_mask & TLS_TPREL) == 0)
13717 {
13718 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13719 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13720 if (insn == 0)
13721 abort ();
13722 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13723 /* Was PPC64_TLS which sits on insn boundary, now
13724 PPC64_TPREL16_LO which is at low-order half-word. */
13725 rel->r_offset += d_offset;
13726 r_type = R_PPC64_TPREL16_LO;
13727 if (toc_symndx != 0)
13728 {
13729 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13730 rel->r_addend = toc_addend;
13731 /* We changed the symbol. Start over in order to
13732 get h, sym, sec etc. right. */
13733 goto again;
13734 }
13735 else
13736 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13737 }
13738 break;
13739
13740 case R_PPC64_GOT_TLSGD16_HI:
13741 case R_PPC64_GOT_TLSGD16_HA:
13742 tls_gd = TLS_TPRELGD;
13743 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13744 goto tls_gdld_hi;
13745 break;
13746
13747 case R_PPC64_GOT_TLSLD16_HI:
13748 case R_PPC64_GOT_TLSLD16_HA:
13749 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13750 {
13751 tls_gdld_hi:
13752 if ((tls_mask & tls_gd) != 0)
13753 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13754 + R_PPC64_GOT_TPREL16_DS);
13755 else
13756 {
13757 rel->r_offset -= d_offset;
13758 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13759 r_type = R_PPC64_NONE;
13760 }
13761 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13762 }
13763 break;
13764
13765 case R_PPC64_GOT_TLSGD16:
13766 case R_PPC64_GOT_TLSGD16_LO:
13767 tls_gd = TLS_TPRELGD;
13768 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13769 goto tls_ldgd_opt;
13770 break;
13771
13772 case R_PPC64_GOT_TLSLD16:
13773 case R_PPC64_GOT_TLSLD16_LO:
13774 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13775 {
13776 unsigned int insn1, insn2;
13777 bfd_vma offset;
13778
13779 tls_ldgd_opt:
13780 offset = (bfd_vma) -1;
13781 /* If not using the newer R_PPC64_TLSGD/LD to mark
13782 __tls_get_addr calls, we must trust that the call
13783 stays with its arg setup insns, ie. that the next
13784 reloc is the __tls_get_addr call associated with
13785 the current reloc. Edit both insns. */
13786 if (input_section->has_tls_get_addr_call
13787 && rel + 1 < relend
13788 && branch_reloc_hash_match (input_bfd, rel + 1,
13789 htab->tls_get_addr,
13790 htab->tls_get_addr_fd))
13791 offset = rel[1].r_offset;
13792 /* We read the low GOT_TLS (or TOC16) insn because we
13793 need to keep the destination reg. It may be
13794 something other than the usual r3, and moved to r3
13795 before the call by intervening code. */
13796 insn1 = bfd_get_32 (input_bfd,
13797 contents + rel->r_offset - d_offset);
13798 if ((tls_mask & tls_gd) != 0)
13799 {
13800 /* IE */
13801 insn1 &= (0x1f << 21) | (0x1f << 16);
13802 insn1 |= 58 << 26; /* ld */
13803 insn2 = 0x7c636a14; /* add 3,3,13 */
13804 if (offset != (bfd_vma) -1)
13805 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13806 if ((tls_mask & TLS_EXPLICIT) == 0)
13807 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13808 + R_PPC64_GOT_TPREL16_DS);
13809 else
13810 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13811 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13812 }
13813 else
13814 {
13815 /* LE */
13816 insn1 &= 0x1f << 21;
13817 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13818 insn2 = 0x38630000; /* addi 3,3,0 */
13819 if (tls_gd == 0)
13820 {
13821 /* Was an LD reloc. */
13822 if (toc_symndx)
13823 sec = local_sections[toc_symndx];
13824 for (r_symndx = 0;
13825 r_symndx < symtab_hdr->sh_info;
13826 r_symndx++)
13827 if (local_sections[r_symndx] == sec)
13828 break;
13829 if (r_symndx >= symtab_hdr->sh_info)
13830 r_symndx = STN_UNDEF;
13831 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13832 if (r_symndx != STN_UNDEF)
13833 rel->r_addend -= (local_syms[r_symndx].st_value
13834 + sec->output_offset
13835 + sec->output_section->vma);
13836 }
13837 else if (toc_symndx != 0)
13838 {
13839 r_symndx = toc_symndx;
13840 rel->r_addend = toc_addend;
13841 }
13842 r_type = R_PPC64_TPREL16_HA;
13843 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13844 if (offset != (bfd_vma) -1)
13845 {
13846 rel[1].r_info = ELF64_R_INFO (r_symndx,
13847 R_PPC64_TPREL16_LO);
13848 rel[1].r_offset = offset + d_offset;
13849 rel[1].r_addend = rel->r_addend;
13850 }
13851 }
13852 bfd_put_32 (input_bfd, insn1,
13853 contents + rel->r_offset - d_offset);
13854 if (offset != (bfd_vma) -1)
13855 bfd_put_32 (input_bfd, insn2, contents + offset);
13856 if ((tls_mask & tls_gd) == 0
13857 && (tls_gd == 0 || toc_symndx != 0))
13858 {
13859 /* We changed the symbol. Start over in order
13860 to get h, sym, sec etc. right. */
13861 goto again;
13862 }
13863 }
13864 break;
13865
13866 case R_PPC64_TLSGD:
13867 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13868 {
13869 unsigned int insn2;
13870 bfd_vma offset = rel->r_offset;
13871
13872 if ((tls_mask & TLS_TPRELGD) != 0)
13873 {
13874 /* IE */
13875 r_type = R_PPC64_NONE;
13876 insn2 = 0x7c636a14; /* add 3,3,13 */
13877 }
13878 else
13879 {
13880 /* LE */
13881 if (toc_symndx != 0)
13882 {
13883 r_symndx = toc_symndx;
13884 rel->r_addend = toc_addend;
13885 }
13886 r_type = R_PPC64_TPREL16_LO;
13887 rel->r_offset = offset + d_offset;
13888 insn2 = 0x38630000; /* addi 3,3,0 */
13889 }
13890 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13891 /* Zap the reloc on the _tls_get_addr call too. */
13892 BFD_ASSERT (offset == rel[1].r_offset);
13893 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13894 bfd_put_32 (input_bfd, insn2, contents + offset);
13895 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13896 goto again;
13897 }
13898 break;
13899
13900 case R_PPC64_TLSLD:
13901 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13902 {
13903 unsigned int insn2;
13904 bfd_vma offset = rel->r_offset;
13905
13906 if (toc_symndx)
13907 sec = local_sections[toc_symndx];
13908 for (r_symndx = 0;
13909 r_symndx < symtab_hdr->sh_info;
13910 r_symndx++)
13911 if (local_sections[r_symndx] == sec)
13912 break;
13913 if (r_symndx >= symtab_hdr->sh_info)
13914 r_symndx = STN_UNDEF;
13915 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13916 if (r_symndx != STN_UNDEF)
13917 rel->r_addend -= (local_syms[r_symndx].st_value
13918 + sec->output_offset
13919 + sec->output_section->vma);
13920
13921 r_type = R_PPC64_TPREL16_LO;
13922 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13923 rel->r_offset = offset + d_offset;
13924 /* Zap the reloc on the _tls_get_addr call too. */
13925 BFD_ASSERT (offset == rel[1].r_offset);
13926 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13927 insn2 = 0x38630000; /* addi 3,3,0 */
13928 bfd_put_32 (input_bfd, insn2, contents + offset);
13929 goto again;
13930 }
13931 break;
13932
13933 case R_PPC64_DTPMOD64:
13934 if (rel + 1 < relend
13935 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13936 && rel[1].r_offset == rel->r_offset + 8)
13937 {
13938 if ((tls_mask & TLS_GD) == 0)
13939 {
13940 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13941 if ((tls_mask & TLS_TPRELGD) != 0)
13942 r_type = R_PPC64_TPREL64;
13943 else
13944 {
13945 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13946 r_type = R_PPC64_NONE;
13947 }
13948 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13949 }
13950 }
13951 else
13952 {
13953 if ((tls_mask & TLS_LD) == 0)
13954 {
13955 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13956 r_type = R_PPC64_NONE;
13957 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13958 }
13959 }
13960 break;
13961
13962 case R_PPC64_TPREL64:
13963 if ((tls_mask & TLS_TPREL) == 0)
13964 {
13965 r_type = R_PPC64_NONE;
13966 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13967 }
13968 break;
13969
13970 case R_PPC64_ENTRY:
13971 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13972 if (!bfd_link_pic (info)
13973 && !info->traditional_format
13974 && relocation + 0x80008000 <= 0xffffffff)
13975 {
13976 unsigned int insn1, insn2;
13977
13978 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13979 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13980 if ((insn1 & ~0xfffc) == LD_R2_0R12
13981 && insn2 == ADD_R2_R2_R12)
13982 {
13983 bfd_put_32 (input_bfd,
13984 LIS_R2 + PPC_HA (relocation),
13985 contents + rel->r_offset);
13986 bfd_put_32 (input_bfd,
13987 ADDI_R2_R2 + PPC_LO (relocation),
13988 contents + rel->r_offset + 4);
13989 }
13990 }
13991 else
13992 {
13993 relocation -= (rel->r_offset
13994 + input_section->output_offset
13995 + input_section->output_section->vma);
13996 if (relocation + 0x80008000 <= 0xffffffff)
13997 {
13998 unsigned int insn1, insn2;
13999
14000 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14001 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14002 if ((insn1 & ~0xfffc) == LD_R2_0R12
14003 && insn2 == ADD_R2_R2_R12)
14004 {
14005 bfd_put_32 (input_bfd,
14006 ADDIS_R2_R12 + PPC_HA (relocation),
14007 contents + rel->r_offset);
14008 bfd_put_32 (input_bfd,
14009 ADDI_R2_R2 + PPC_LO (relocation),
14010 contents + rel->r_offset + 4);
14011 }
14012 }
14013 }
14014 break;
14015
14016 case R_PPC64_REL16_HA:
14017 /* If we are generating a non-PIC executable, edit
14018 . 0: addis 2,12,.TOC.-0b@ha
14019 . addi 2,2,.TOC.-0b@l
14020 used by ELFv2 global entry points to set up r2, to
14021 . lis 2,.TOC.@ha
14022 . addi 2,2,.TOC.@l
14023 if .TOC. is in range. */
14024 if (!bfd_link_pic (info)
14025 && !info->traditional_format
14026 && !htab->opd_abi
14027 && rel->r_addend == d_offset
14028 && h != NULL && &h->elf == htab->elf.hgot
14029 && rel + 1 < relend
14030 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14031 && rel[1].r_offset == rel->r_offset + 4
14032 && rel[1].r_addend == rel->r_addend + 4
14033 && relocation + 0x80008000 <= 0xffffffff)
14034 {
14035 unsigned int insn1, insn2;
14036 bfd_vma offset = rel->r_offset - d_offset;
14037 insn1 = bfd_get_32 (input_bfd, contents + offset);
14038 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14039 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14040 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14041 {
14042 r_type = R_PPC64_ADDR16_HA;
14043 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14044 rel->r_addend -= d_offset;
14045 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14046 rel[1].r_addend -= d_offset + 4;
14047 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14048 }
14049 }
14050 break;
14051 }
14052
14053 /* Handle other relocations that tweak non-addend part of insn. */
14054 insn = 0;
14055 max_br_offset = 1 << 25;
14056 addend = rel->r_addend;
14057 reloc_dest = DEST_NORMAL;
14058 switch (r_type)
14059 {
14060 default:
14061 break;
14062
14063 case R_PPC64_TOCSAVE:
14064 if (relocation + addend == (rel->r_offset
14065 + input_section->output_offset
14066 + input_section->output_section->vma)
14067 && tocsave_find (htab, NO_INSERT,
14068 &local_syms, rel, input_bfd))
14069 {
14070 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14071 if (insn == NOP
14072 || insn == CROR_151515 || insn == CROR_313131)
14073 bfd_put_32 (input_bfd,
14074 STD_R2_0R1 + STK_TOC (htab),
14075 contents + rel->r_offset);
14076 }
14077 break;
14078
14079 /* Branch taken prediction relocations. */
14080 case R_PPC64_ADDR14_BRTAKEN:
14081 case R_PPC64_REL14_BRTAKEN:
14082 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14083 /* Fall through. */
14084
14085 /* Branch not taken prediction relocations. */
14086 case R_PPC64_ADDR14_BRNTAKEN:
14087 case R_PPC64_REL14_BRNTAKEN:
14088 insn |= bfd_get_32 (input_bfd,
14089 contents + rel->r_offset) & ~(0x01 << 21);
14090 /* Fall through. */
14091
14092 case R_PPC64_REL14:
14093 max_br_offset = 1 << 15;
14094 /* Fall through. */
14095
14096 case R_PPC64_REL24:
14097 /* Calls to functions with a different TOC, such as calls to
14098 shared objects, need to alter the TOC pointer. This is
14099 done using a linkage stub. A REL24 branching to these
14100 linkage stubs needs to be followed by a nop, as the nop
14101 will be replaced with an instruction to restore the TOC
14102 base pointer. */
14103 fdh = h;
14104 if (h != NULL
14105 && h->oh != NULL
14106 && h->oh->is_func_descriptor)
14107 fdh = ppc_follow_link (h->oh);
14108 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14109 htab);
14110 if (stub_entry != NULL
14111 && (stub_entry->stub_type == ppc_stub_plt_call
14112 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14113 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14114 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14115 {
14116 bfd_boolean can_plt_call = FALSE;
14117
14118 if (stub_entry->stub_type == ppc_stub_plt_call
14119 && !htab->opd_abi
14120 && htab->params->plt_localentry0 != 0
14121 && is_elfv2_localentry0 (&h->elf))
14122 {
14123 /* The function doesn't use or change r2. */
14124 can_plt_call = TRUE;
14125 }
14126
14127 /* All of these stubs may modify r2, so there must be a
14128 branch and link followed by a nop. The nop is
14129 replaced by an insn to restore r2. */
14130 else if (rel->r_offset + 8 <= input_section->size)
14131 {
14132 unsigned long br;
14133
14134 br = bfd_get_32 (input_bfd,
14135 contents + rel->r_offset);
14136 if ((br & 1) != 0)
14137 {
14138 unsigned long nop;
14139
14140 nop = bfd_get_32 (input_bfd,
14141 contents + rel->r_offset + 4);
14142 if (nop == NOP
14143 || nop == CROR_151515 || nop == CROR_313131)
14144 {
14145 if (h != NULL
14146 && (h == htab->tls_get_addr_fd
14147 || h == htab->tls_get_addr)
14148 && htab->params->tls_get_addr_opt)
14149 {
14150 /* Special stub used, leave nop alone. */
14151 }
14152 else
14153 bfd_put_32 (input_bfd,
14154 LD_R2_0R1 + STK_TOC (htab),
14155 contents + rel->r_offset + 4);
14156 can_plt_call = TRUE;
14157 }
14158 }
14159 }
14160
14161 if (!can_plt_call && h != NULL)
14162 {
14163 const char *name = h->elf.root.root.string;
14164
14165 if (*name == '.')
14166 ++name;
14167
14168 if (strncmp (name, "__libc_start_main", 17) == 0
14169 && (name[17] == 0 || name[17] == '@'))
14170 {
14171 /* Allow crt1 branch to go via a toc adjusting
14172 stub. Other calls that never return could do
14173 the same, if we could detect such. */
14174 can_plt_call = TRUE;
14175 }
14176 }
14177
14178 if (!can_plt_call)
14179 {
14180 /* g++ as of 20130507 emits self-calls without a
14181 following nop. This is arguably wrong since we
14182 have conflicting information. On the one hand a
14183 global symbol and on the other a local call
14184 sequence, but don't error for this special case.
14185 It isn't possible to cheaply verify we have
14186 exactly such a call. Allow all calls to the same
14187 section. */
14188 asection *code_sec = sec;
14189
14190 if (get_opd_info (sec) != NULL)
14191 {
14192 bfd_vma off = (relocation + addend
14193 - sec->output_section->vma
14194 - sec->output_offset);
14195
14196 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14197 }
14198 if (code_sec == input_section)
14199 can_plt_call = TRUE;
14200 }
14201
14202 if (!can_plt_call)
14203 {
14204 if (stub_entry->stub_type == ppc_stub_plt_call
14205 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14206 info->callbacks->einfo
14207 /* xgettext:c-format */
14208 (_("%H: call to `%T' lacks nop, can't restore toc; "
14209 "recompile with -fPIC\n"),
14210 input_bfd, input_section, rel->r_offset, sym_name);
14211 else
14212 info->callbacks->einfo
14213 /* xgettext:c-format */
14214 (_("%H: call to `%T' lacks nop, can't restore toc; "
14215 "(-mcmodel=small toc adjust stub)\n"),
14216 input_bfd, input_section, rel->r_offset, sym_name);
14217
14218 bfd_set_error (bfd_error_bad_value);
14219 ret = FALSE;
14220 }
14221
14222 if (can_plt_call
14223 && (stub_entry->stub_type == ppc_stub_plt_call
14224 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14225 unresolved_reloc = FALSE;
14226 }
14227
14228 if ((stub_entry == NULL
14229 || stub_entry->stub_type == ppc_stub_long_branch
14230 || stub_entry->stub_type == ppc_stub_plt_branch)
14231 && get_opd_info (sec) != NULL)
14232 {
14233 /* The branch destination is the value of the opd entry. */
14234 bfd_vma off = (relocation + addend
14235 - sec->output_section->vma
14236 - sec->output_offset);
14237 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14238 if (dest != (bfd_vma) -1)
14239 {
14240 relocation = dest;
14241 addend = 0;
14242 reloc_dest = DEST_OPD;
14243 }
14244 }
14245
14246 /* If the branch is out of reach we ought to have a long
14247 branch stub. */
14248 from = (rel->r_offset
14249 + input_section->output_offset
14250 + input_section->output_section->vma);
14251
14252 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14253 ? fdh->elf.other
14254 : sym->st_other);
14255
14256 if (stub_entry != NULL
14257 && (stub_entry->stub_type == ppc_stub_long_branch
14258 || stub_entry->stub_type == ppc_stub_plt_branch)
14259 && (r_type == R_PPC64_ADDR14_BRTAKEN
14260 || r_type == R_PPC64_ADDR14_BRNTAKEN
14261 || (relocation + addend - from + max_br_offset
14262 < 2 * max_br_offset)))
14263 /* Don't use the stub if this branch is in range. */
14264 stub_entry = NULL;
14265
14266 if (stub_entry != NULL)
14267 {
14268 /* Munge up the value and addend so that we call the stub
14269 rather than the procedure directly. */
14270 asection *stub_sec = stub_entry->group->stub_sec;
14271
14272 if (stub_entry->stub_type == ppc_stub_save_res)
14273 relocation += (stub_sec->output_offset
14274 + stub_sec->output_section->vma
14275 + stub_sec->size - htab->sfpr->size
14276 - htab->sfpr->output_offset
14277 - htab->sfpr->output_section->vma);
14278 else
14279 relocation = (stub_entry->stub_offset
14280 + stub_sec->output_offset
14281 + stub_sec->output_section->vma);
14282 addend = 0;
14283 reloc_dest = DEST_STUB;
14284
14285 if ((stub_entry->stub_type == ppc_stub_plt_call
14286 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14287 && (ALWAYS_EMIT_R2SAVE
14288 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14289 && rel + 1 < relend
14290 && rel[1].r_offset == rel->r_offset + 4
14291 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14292 relocation += 4;
14293 }
14294
14295 if (insn != 0)
14296 {
14297 if (is_isa_v2)
14298 {
14299 /* Set 'a' bit. This is 0b00010 in BO field for branch
14300 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14301 for branch on CTR insns (BO == 1a00t or 1a01t). */
14302 if ((insn & (0x14 << 21)) == (0x04 << 21))
14303 insn |= 0x02 << 21;
14304 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14305 insn |= 0x08 << 21;
14306 else
14307 break;
14308 }
14309 else
14310 {
14311 /* Invert 'y' bit if not the default. */
14312 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14313 insn ^= 0x01 << 21;
14314 }
14315
14316 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14317 }
14318
14319 /* NOP out calls to undefined weak functions.
14320 We can thus call a weak function without first
14321 checking whether the function is defined. */
14322 else if (h != NULL
14323 && h->elf.root.type == bfd_link_hash_undefweak
14324 && h->elf.dynindx == -1
14325 && r_type == R_PPC64_REL24
14326 && relocation == 0
14327 && addend == 0)
14328 {
14329 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14330 goto copy_reloc;
14331 }
14332 break;
14333 }
14334
14335 /* Set `addend'. */
14336 tls_type = 0;
14337 switch (r_type)
14338 {
14339 default:
14340 info->callbacks->einfo
14341 /* xgettext:c-format */
14342 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14343 input_bfd, (int) r_type, sym_name);
14344
14345 bfd_set_error (bfd_error_bad_value);
14346 ret = FALSE;
14347 goto copy_reloc;
14348
14349 case R_PPC64_NONE:
14350 case R_PPC64_TLS:
14351 case R_PPC64_TLSGD:
14352 case R_PPC64_TLSLD:
14353 case R_PPC64_TOCSAVE:
14354 case R_PPC64_GNU_VTINHERIT:
14355 case R_PPC64_GNU_VTENTRY:
14356 case R_PPC64_ENTRY:
14357 goto copy_reloc;
14358
14359 /* GOT16 relocations. Like an ADDR16 using the symbol's
14360 address in the GOT as relocation value instead of the
14361 symbol's value itself. Also, create a GOT entry for the
14362 symbol and put the symbol value there. */
14363 case R_PPC64_GOT_TLSGD16:
14364 case R_PPC64_GOT_TLSGD16_LO:
14365 case R_PPC64_GOT_TLSGD16_HI:
14366 case R_PPC64_GOT_TLSGD16_HA:
14367 tls_type = TLS_TLS | TLS_GD;
14368 goto dogot;
14369
14370 case R_PPC64_GOT_TLSLD16:
14371 case R_PPC64_GOT_TLSLD16_LO:
14372 case R_PPC64_GOT_TLSLD16_HI:
14373 case R_PPC64_GOT_TLSLD16_HA:
14374 tls_type = TLS_TLS | TLS_LD;
14375 goto dogot;
14376
14377 case R_PPC64_GOT_TPREL16_DS:
14378 case R_PPC64_GOT_TPREL16_LO_DS:
14379 case R_PPC64_GOT_TPREL16_HI:
14380 case R_PPC64_GOT_TPREL16_HA:
14381 tls_type = TLS_TLS | TLS_TPREL;
14382 goto dogot;
14383
14384 case R_PPC64_GOT_DTPREL16_DS:
14385 case R_PPC64_GOT_DTPREL16_LO_DS:
14386 case R_PPC64_GOT_DTPREL16_HI:
14387 case R_PPC64_GOT_DTPREL16_HA:
14388 tls_type = TLS_TLS | TLS_DTPREL;
14389 goto dogot;
14390
14391 case R_PPC64_GOT16:
14392 case R_PPC64_GOT16_LO:
14393 case R_PPC64_GOT16_HI:
14394 case R_PPC64_GOT16_HA:
14395 case R_PPC64_GOT16_DS:
14396 case R_PPC64_GOT16_LO_DS:
14397 dogot:
14398 {
14399 /* Relocation is to the entry for this symbol in the global
14400 offset table. */
14401 asection *got;
14402 bfd_vma *offp;
14403 bfd_vma off;
14404 unsigned long indx = 0;
14405 struct got_entry *ent;
14406
14407 if (tls_type == (TLS_TLS | TLS_LD)
14408 && (h == NULL
14409 || !h->elf.def_dynamic))
14410 ent = ppc64_tlsld_got (input_bfd);
14411 else
14412 {
14413 if (h != NULL)
14414 {
14415 if (!htab->elf.dynamic_sections_created
14416 || h->elf.dynindx == -1
14417 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14418 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14419 /* This is actually a static link, or it is a
14420 -Bsymbolic link and the symbol is defined
14421 locally, or the symbol was forced to be local
14422 because of a version file. */
14423 ;
14424 else
14425 {
14426 indx = h->elf.dynindx;
14427 unresolved_reloc = FALSE;
14428 }
14429 ent = h->elf.got.glist;
14430 }
14431 else
14432 {
14433 if (local_got_ents == NULL)
14434 abort ();
14435 ent = local_got_ents[r_symndx];
14436 }
14437
14438 for (; ent != NULL; ent = ent->next)
14439 if (ent->addend == orig_rel.r_addend
14440 && ent->owner == input_bfd
14441 && ent->tls_type == tls_type)
14442 break;
14443 }
14444
14445 if (ent == NULL)
14446 abort ();
14447 if (ent->is_indirect)
14448 ent = ent->got.ent;
14449 offp = &ent->got.offset;
14450 got = ppc64_elf_tdata (ent->owner)->got;
14451 if (got == NULL)
14452 abort ();
14453
14454 /* The offset must always be a multiple of 8. We use the
14455 least significant bit to record whether we have already
14456 processed this entry. */
14457 off = *offp;
14458 if ((off & 1) != 0)
14459 off &= ~1;
14460 else
14461 {
14462 /* Generate relocs for the dynamic linker, except in
14463 the case of TLSLD where we'll use one entry per
14464 module. */
14465 asection *relgot;
14466 bfd_boolean ifunc;
14467
14468 *offp = off | 1;
14469 relgot = NULL;
14470 ifunc = (h != NULL
14471 ? h->elf.type == STT_GNU_IFUNC
14472 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14473 if (ifunc)
14474 {
14475 relgot = htab->elf.irelplt;
14476 if (indx == 0)
14477 htab->local_ifunc_resolver = 1;
14478 else if (is_static_defined (&h->elf))
14479 htab->maybe_local_ifunc_resolver = 1;
14480 }
14481 else if (indx != 0
14482 || (bfd_link_pic (info)
14483 && (h == NULL
14484 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14485 || (tls_type == (TLS_TLS | TLS_LD)
14486 && !h->elf.def_dynamic))
14487 && !(tls_type == (TLS_TLS | TLS_TPREL)
14488 && bfd_link_executable (info)
14489 && SYMBOL_REFERENCES_LOCAL (info, &h->elf))))
14490 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14491 if (relgot != NULL)
14492 {
14493 outrel.r_offset = (got->output_section->vma
14494 + got->output_offset
14495 + off);
14496 outrel.r_addend = addend;
14497 if (tls_type & (TLS_LD | TLS_GD))
14498 {
14499 outrel.r_addend = 0;
14500 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14501 if (tls_type == (TLS_TLS | TLS_GD))
14502 {
14503 loc = relgot->contents;
14504 loc += (relgot->reloc_count++
14505 * sizeof (Elf64_External_Rela));
14506 bfd_elf64_swap_reloca_out (output_bfd,
14507 &outrel, loc);
14508 outrel.r_offset += 8;
14509 outrel.r_addend = addend;
14510 outrel.r_info
14511 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14512 }
14513 }
14514 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14515 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14516 else if (tls_type == (TLS_TLS | TLS_TPREL))
14517 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14518 else if (indx != 0)
14519 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14520 else
14521 {
14522 if (ifunc)
14523 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14524 else
14525 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14526
14527 /* Write the .got section contents for the sake
14528 of prelink. */
14529 loc = got->contents + off;
14530 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14531 loc);
14532 }
14533
14534 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14535 {
14536 outrel.r_addend += relocation;
14537 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14538 {
14539 if (htab->elf.tls_sec == NULL)
14540 outrel.r_addend = 0;
14541 else
14542 outrel.r_addend -= htab->elf.tls_sec->vma;
14543 }
14544 }
14545 loc = relgot->contents;
14546 loc += (relgot->reloc_count++
14547 * sizeof (Elf64_External_Rela));
14548 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14549 }
14550
14551 /* Init the .got section contents here if we're not
14552 emitting a reloc. */
14553 else
14554 {
14555 relocation += addend;
14556 if (tls_type != 0)
14557 {
14558 if (htab->elf.tls_sec == NULL)
14559 relocation = 0;
14560 else
14561 {
14562 if (tls_type & TLS_LD)
14563 relocation = 0;
14564 else
14565 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14566 if (tls_type & TLS_TPREL)
14567 relocation += DTP_OFFSET - TP_OFFSET;
14568 }
14569
14570 if (tls_type & (TLS_GD | TLS_LD))
14571 {
14572 bfd_put_64 (output_bfd, relocation,
14573 got->contents + off + 8);
14574 relocation = 1;
14575 }
14576 }
14577 bfd_put_64 (output_bfd, relocation,
14578 got->contents + off);
14579 }
14580 }
14581
14582 if (off >= (bfd_vma) -2)
14583 abort ();
14584
14585 relocation = got->output_section->vma + got->output_offset + off;
14586 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14587 }
14588 break;
14589
14590 case R_PPC64_PLT16_HA:
14591 case R_PPC64_PLT16_HI:
14592 case R_PPC64_PLT16_LO:
14593 case R_PPC64_PLT32:
14594 case R_PPC64_PLT64:
14595 /* Relocation is to the entry for this symbol in the
14596 procedure linkage table. */
14597 {
14598 struct plt_entry **plt_list = NULL;
14599 if (h != NULL)
14600 plt_list = &h->elf.plt.plist;
14601 else if (local_got_ents != NULL)
14602 {
14603 struct plt_entry **local_plt = (struct plt_entry **)
14604 (local_got_ents + symtab_hdr->sh_info);
14605 unsigned char *local_got_tls_masks = (unsigned char *)
14606 (local_plt + symtab_hdr->sh_info);
14607 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14608 plt_list = local_plt + r_symndx;
14609 }
14610 if (plt_list)
14611 {
14612 struct plt_entry *ent;
14613
14614 for (ent = *plt_list; ent != NULL; ent = ent->next)
14615 if (ent->plt.offset != (bfd_vma) -1
14616 && ent->addend == orig_rel.r_addend)
14617 {
14618 asection *plt;
14619
14620 plt = htab->elf.splt;
14621 if (!htab->elf.dynamic_sections_created
14622 || h == NULL
14623 || h->elf.dynindx == -1)
14624 plt = htab->elf.iplt;
14625 relocation = (plt->output_section->vma
14626 + plt->output_offset
14627 + ent->plt.offset);
14628 addend = 0;
14629 unresolved_reloc = FALSE;
14630 break;
14631 }
14632 }
14633 }
14634 break;
14635
14636 case R_PPC64_TOC:
14637 /* Relocation value is TOC base. */
14638 relocation = TOCstart;
14639 if (r_symndx == STN_UNDEF)
14640 relocation += htab->sec_info[input_section->id].toc_off;
14641 else if (unresolved_reloc)
14642 ;
14643 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14644 relocation += htab->sec_info[sec->id].toc_off;
14645 else
14646 unresolved_reloc = TRUE;
14647 goto dodyn;
14648
14649 /* TOC16 relocs. We want the offset relative to the TOC base,
14650 which is the address of the start of the TOC plus 0x8000.
14651 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14652 in this order. */
14653 case R_PPC64_TOC16:
14654 case R_PPC64_TOC16_LO:
14655 case R_PPC64_TOC16_HI:
14656 case R_PPC64_TOC16_DS:
14657 case R_PPC64_TOC16_LO_DS:
14658 case R_PPC64_TOC16_HA:
14659 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14660 break;
14661
14662 /* Relocate against the beginning of the section. */
14663 case R_PPC64_SECTOFF:
14664 case R_PPC64_SECTOFF_LO:
14665 case R_PPC64_SECTOFF_HI:
14666 case R_PPC64_SECTOFF_DS:
14667 case R_PPC64_SECTOFF_LO_DS:
14668 case R_PPC64_SECTOFF_HA:
14669 if (sec != NULL)
14670 addend -= sec->output_section->vma;
14671 break;
14672
14673 case R_PPC64_REL16:
14674 case R_PPC64_REL16_LO:
14675 case R_PPC64_REL16_HI:
14676 case R_PPC64_REL16_HA:
14677 case R_PPC64_REL16DX_HA:
14678 break;
14679
14680 case R_PPC64_REL14:
14681 case R_PPC64_REL14_BRNTAKEN:
14682 case R_PPC64_REL14_BRTAKEN:
14683 case R_PPC64_REL24:
14684 break;
14685
14686 case R_PPC64_TPREL16:
14687 case R_PPC64_TPREL16_LO:
14688 case R_PPC64_TPREL16_HI:
14689 case R_PPC64_TPREL16_HA:
14690 case R_PPC64_TPREL16_DS:
14691 case R_PPC64_TPREL16_LO_DS:
14692 case R_PPC64_TPREL16_HIGH:
14693 case R_PPC64_TPREL16_HIGHA:
14694 case R_PPC64_TPREL16_HIGHER:
14695 case R_PPC64_TPREL16_HIGHERA:
14696 case R_PPC64_TPREL16_HIGHEST:
14697 case R_PPC64_TPREL16_HIGHESTA:
14698 if (h != NULL
14699 && h->elf.root.type == bfd_link_hash_undefweak
14700 && h->elf.dynindx == -1)
14701 {
14702 /* Make this relocation against an undefined weak symbol
14703 resolve to zero. This is really just a tweak, since
14704 code using weak externs ought to check that they are
14705 defined before using them. */
14706 bfd_byte *p = contents + rel->r_offset - d_offset;
14707
14708 insn = bfd_get_32 (input_bfd, p);
14709 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14710 if (insn != 0)
14711 bfd_put_32 (input_bfd, insn, p);
14712 break;
14713 }
14714 if (htab->elf.tls_sec != NULL)
14715 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14716 /* The TPREL16 relocs shouldn't really be used in shared
14717 libs or with non-local symbols as that will result in
14718 DT_TEXTREL being set, but support them anyway. */
14719 goto dodyn;
14720
14721 case R_PPC64_DTPREL16:
14722 case R_PPC64_DTPREL16_LO:
14723 case R_PPC64_DTPREL16_HI:
14724 case R_PPC64_DTPREL16_HA:
14725 case R_PPC64_DTPREL16_DS:
14726 case R_PPC64_DTPREL16_LO_DS:
14727 case R_PPC64_DTPREL16_HIGH:
14728 case R_PPC64_DTPREL16_HIGHA:
14729 case R_PPC64_DTPREL16_HIGHER:
14730 case R_PPC64_DTPREL16_HIGHERA:
14731 case R_PPC64_DTPREL16_HIGHEST:
14732 case R_PPC64_DTPREL16_HIGHESTA:
14733 if (htab->elf.tls_sec != NULL)
14734 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14735 break;
14736
14737 case R_PPC64_ADDR64_LOCAL:
14738 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14739 ? h->elf.other
14740 : sym->st_other);
14741 break;
14742
14743 case R_PPC64_DTPMOD64:
14744 relocation = 1;
14745 addend = 0;
14746 goto dodyn;
14747
14748 case R_PPC64_TPREL64:
14749 if (htab->elf.tls_sec != NULL)
14750 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14751 goto dodyn;
14752
14753 case R_PPC64_DTPREL64:
14754 if (htab->elf.tls_sec != NULL)
14755 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14756 /* Fall through. */
14757
14758 /* Relocations that may need to be propagated if this is a
14759 dynamic object. */
14760 case R_PPC64_REL30:
14761 case R_PPC64_REL32:
14762 case R_PPC64_REL64:
14763 case R_PPC64_ADDR14:
14764 case R_PPC64_ADDR14_BRNTAKEN:
14765 case R_PPC64_ADDR14_BRTAKEN:
14766 case R_PPC64_ADDR16:
14767 case R_PPC64_ADDR16_DS:
14768 case R_PPC64_ADDR16_HA:
14769 case R_PPC64_ADDR16_HI:
14770 case R_PPC64_ADDR16_HIGH:
14771 case R_PPC64_ADDR16_HIGHA:
14772 case R_PPC64_ADDR16_HIGHER:
14773 case R_PPC64_ADDR16_HIGHERA:
14774 case R_PPC64_ADDR16_HIGHEST:
14775 case R_PPC64_ADDR16_HIGHESTA:
14776 case R_PPC64_ADDR16_LO:
14777 case R_PPC64_ADDR16_LO_DS:
14778 case R_PPC64_ADDR24:
14779 case R_PPC64_ADDR32:
14780 case R_PPC64_ADDR64:
14781 case R_PPC64_UADDR16:
14782 case R_PPC64_UADDR32:
14783 case R_PPC64_UADDR64:
14784 dodyn:
14785 if ((input_section->flags & SEC_ALLOC) == 0)
14786 break;
14787
14788 if (NO_OPD_RELOCS && is_opd)
14789 break;
14790
14791 if (bfd_link_pic (info)
14792 ? ((h == NULL
14793 || h->dyn_relocs != NULL)
14794 && ((h != NULL && pc_dynrelocs (h))
14795 || must_be_dyn_reloc (info, r_type)))
14796 : (h != NULL
14797 ? h->dyn_relocs != NULL
14798 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14799 {
14800 bfd_boolean skip, relocate;
14801 asection *sreloc;
14802 bfd_vma out_off;
14803 long indx = 0;
14804
14805 /* When generating a dynamic object, these relocations
14806 are copied into the output file to be resolved at run
14807 time. */
14808
14809 skip = FALSE;
14810 relocate = FALSE;
14811
14812 out_off = _bfd_elf_section_offset (output_bfd, info,
14813 input_section, rel->r_offset);
14814 if (out_off == (bfd_vma) -1)
14815 skip = TRUE;
14816 else if (out_off == (bfd_vma) -2)
14817 skip = TRUE, relocate = TRUE;
14818 out_off += (input_section->output_section->vma
14819 + input_section->output_offset);
14820 outrel.r_offset = out_off;
14821 outrel.r_addend = rel->r_addend;
14822
14823 /* Optimize unaligned reloc use. */
14824 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14825 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14826 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14827 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14828 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14829 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14830 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14831 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14832 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14833
14834 if (skip)
14835 memset (&outrel, 0, sizeof outrel);
14836 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14837 && !is_opd
14838 && r_type != R_PPC64_TOC)
14839 {
14840 indx = h->elf.dynindx;
14841 BFD_ASSERT (indx != -1);
14842 outrel.r_info = ELF64_R_INFO (indx, r_type);
14843 }
14844 else
14845 {
14846 /* This symbol is local, or marked to become local,
14847 or this is an opd section reloc which must point
14848 at a local function. */
14849 outrel.r_addend += relocation;
14850 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14851 {
14852 if (is_opd && h != NULL)
14853 {
14854 /* Lie about opd entries. This case occurs
14855 when building shared libraries and we
14856 reference a function in another shared
14857 lib. The same thing happens for a weak
14858 definition in an application that's
14859 overridden by a strong definition in a
14860 shared lib. (I believe this is a generic
14861 bug in binutils handling of weak syms.)
14862 In these cases we won't use the opd
14863 entry in this lib. */
14864 unresolved_reloc = FALSE;
14865 }
14866 if (!is_opd
14867 && r_type == R_PPC64_ADDR64
14868 && (h != NULL
14869 ? h->elf.type == STT_GNU_IFUNC
14870 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14871 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14872 else
14873 {
14874 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14875
14876 /* We need to relocate .opd contents for ld.so.
14877 Prelink also wants simple and consistent rules
14878 for relocs. This make all RELATIVE relocs have
14879 *r_offset equal to r_addend. */
14880 relocate = TRUE;
14881 }
14882 }
14883 else
14884 {
14885 if (h != NULL
14886 ? h->elf.type == STT_GNU_IFUNC
14887 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14888 {
14889 info->callbacks->einfo
14890 /* xgettext:c-format */
14891 (_("%H: %s for indirect "
14892 "function `%T' unsupported\n"),
14893 input_bfd, input_section, rel->r_offset,
14894 ppc64_elf_howto_table[r_type]->name,
14895 sym_name);
14896 ret = FALSE;
14897 }
14898 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14899 ;
14900 else if (sec == NULL || sec->owner == NULL)
14901 {
14902 bfd_set_error (bfd_error_bad_value);
14903 return FALSE;
14904 }
14905 else
14906 {
14907 asection *osec;
14908
14909 osec = sec->output_section;
14910 indx = elf_section_data (osec)->dynindx;
14911
14912 if (indx == 0)
14913 {
14914 if ((osec->flags & SEC_READONLY) == 0
14915 && htab->elf.data_index_section != NULL)
14916 osec = htab->elf.data_index_section;
14917 else
14918 osec = htab->elf.text_index_section;
14919 indx = elf_section_data (osec)->dynindx;
14920 }
14921 BFD_ASSERT (indx != 0);
14922
14923 /* We are turning this relocation into one
14924 against a section symbol, so subtract out
14925 the output section's address but not the
14926 offset of the input section in the output
14927 section. */
14928 outrel.r_addend -= osec->vma;
14929 }
14930
14931 outrel.r_info = ELF64_R_INFO (indx, r_type);
14932 }
14933 }
14934
14935 sreloc = elf_section_data (input_section)->sreloc;
14936 if (h != NULL
14937 ? h->elf.type == STT_GNU_IFUNC
14938 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14939 {
14940 sreloc = htab->elf.irelplt;
14941 if (indx == 0)
14942 htab->local_ifunc_resolver = 1;
14943 else if (is_static_defined (&h->elf))
14944 htab->maybe_local_ifunc_resolver = 1;
14945 }
14946 if (sreloc == NULL)
14947 abort ();
14948
14949 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14950 >= sreloc->size)
14951 abort ();
14952 loc = sreloc->contents;
14953 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14954 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14955
14956 /* If this reloc is against an external symbol, it will
14957 be computed at runtime, so there's no need to do
14958 anything now. However, for the sake of prelink ensure
14959 that the section contents are a known value. */
14960 if (! relocate)
14961 {
14962 unresolved_reloc = FALSE;
14963 /* The value chosen here is quite arbitrary as ld.so
14964 ignores section contents except for the special
14965 case of .opd where the contents might be accessed
14966 before relocation. Choose zero, as that won't
14967 cause reloc overflow. */
14968 relocation = 0;
14969 addend = 0;
14970 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14971 to improve backward compatibility with older
14972 versions of ld. */
14973 if (r_type == R_PPC64_ADDR64)
14974 addend = outrel.r_addend;
14975 /* Adjust pc_relative relocs to have zero in *r_offset. */
14976 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14977 addend = outrel.r_offset;
14978 }
14979 }
14980 break;
14981
14982 case R_PPC64_COPY:
14983 case R_PPC64_GLOB_DAT:
14984 case R_PPC64_JMP_SLOT:
14985 case R_PPC64_JMP_IREL:
14986 case R_PPC64_RELATIVE:
14987 /* We shouldn't ever see these dynamic relocs in relocatable
14988 files. */
14989 /* Fall through. */
14990
14991 case R_PPC64_PLTGOT16:
14992 case R_PPC64_PLTGOT16_DS:
14993 case R_PPC64_PLTGOT16_HA:
14994 case R_PPC64_PLTGOT16_HI:
14995 case R_PPC64_PLTGOT16_LO:
14996 case R_PPC64_PLTGOT16_LO_DS:
14997 case R_PPC64_PLTREL32:
14998 case R_PPC64_PLTREL64:
14999 /* These ones haven't been implemented yet. */
15000
15001 info->callbacks->einfo
15002 /* xgettext:c-format */
15003 (_("%P: %B: %s is not supported for `%T'\n"),
15004 input_bfd,
15005 ppc64_elf_howto_table[r_type]->name, sym_name);
15006
15007 bfd_set_error (bfd_error_invalid_operation);
15008 ret = FALSE;
15009 goto copy_reloc;
15010 }
15011
15012 /* Multi-instruction sequences that access the TOC can be
15013 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15014 to nop; addi rb,r2,x; */
15015 howto = ppc64_elf_howto_table[(int) r_type];
15016 switch (r_type)
15017 {
15018 default:
15019 break;
15020
15021 case R_PPC64_GOT_TLSLD16_HI:
15022 case R_PPC64_GOT_TLSGD16_HI:
15023 case R_PPC64_GOT_TPREL16_HI:
15024 case R_PPC64_GOT_DTPREL16_HI:
15025 case R_PPC64_GOT16_HI:
15026 case R_PPC64_TOC16_HI:
15027 /* These relocs would only be useful if building up an
15028 offset to later add to r2, perhaps in an indexed
15029 addressing mode instruction. Don't try to optimize.
15030 Unfortunately, the possibility of someone building up an
15031 offset like this or even with the HA relocs, means that
15032 we need to check the high insn when optimizing the low
15033 insn. */
15034 break;
15035
15036 case R_PPC64_GOT_TLSLD16_HA:
15037 case R_PPC64_GOT_TLSGD16_HA:
15038 case R_PPC64_GOT_TPREL16_HA:
15039 case R_PPC64_GOT_DTPREL16_HA:
15040 case R_PPC64_GOT16_HA:
15041 case R_PPC64_TOC16_HA:
15042 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15043 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15044 {
15045 bfd_byte *p = contents + (rel->r_offset & ~3);
15046 bfd_put_32 (input_bfd, NOP, p);
15047 }
15048 break;
15049
15050 case R_PPC64_GOT_TLSLD16_LO:
15051 case R_PPC64_GOT_TLSGD16_LO:
15052 case R_PPC64_GOT_TPREL16_LO_DS:
15053 case R_PPC64_GOT_DTPREL16_LO_DS:
15054 case R_PPC64_GOT16_LO:
15055 case R_PPC64_GOT16_LO_DS:
15056 case R_PPC64_TOC16_LO:
15057 case R_PPC64_TOC16_LO_DS:
15058 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15059 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15060 {
15061 bfd_byte *p = contents + (rel->r_offset & ~3);
15062 insn = bfd_get_32 (input_bfd, p);
15063 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15064 {
15065 /* Transform addic to addi when we change reg. */
15066 insn &= ~((0x3f << 26) | (0x1f << 16));
15067 insn |= (14u << 26) | (2 << 16);
15068 }
15069 else
15070 {
15071 insn &= ~(0x1f << 16);
15072 insn |= 2 << 16;
15073 }
15074 bfd_put_32 (input_bfd, insn, p);
15075 }
15076 break;
15077
15078 case R_PPC64_TPREL16_HA:
15079 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15080 {
15081 bfd_byte *p = contents + (rel->r_offset & ~3);
15082 insn = bfd_get_32 (input_bfd, p);
15083 if ((insn & ((0x3f << 26) | 0x1f << 16))
15084 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15085 /* xgettext:c-format */
15086 info->callbacks->minfo
15087 (_("%H: warning: %s unexpected insn %#x.\n"),
15088 input_bfd, input_section, rel->r_offset, howto->name, insn);
15089 else
15090 bfd_put_32 (input_bfd, NOP, p);
15091 }
15092 break;
15093
15094 case R_PPC64_TPREL16_LO:
15095 case R_PPC64_TPREL16_LO_DS:
15096 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15097 {
15098 bfd_byte *p = contents + (rel->r_offset & ~3);
15099 insn = bfd_get_32 (input_bfd, p);
15100 insn &= ~(0x1f << 16);
15101 insn |= 13 << 16;
15102 bfd_put_32 (input_bfd, insn, p);
15103 }
15104 break;
15105 }
15106
15107 /* Do any further special processing. */
15108 switch (r_type)
15109 {
15110 default:
15111 break;
15112
15113 case R_PPC64_REL16_HA:
15114 case R_PPC64_REL16DX_HA:
15115 case R_PPC64_ADDR16_HA:
15116 case R_PPC64_ADDR16_HIGHA:
15117 case R_PPC64_ADDR16_HIGHERA:
15118 case R_PPC64_ADDR16_HIGHESTA:
15119 case R_PPC64_TOC16_HA:
15120 case R_PPC64_SECTOFF_HA:
15121 case R_PPC64_TPREL16_HA:
15122 case R_PPC64_TPREL16_HIGHA:
15123 case R_PPC64_TPREL16_HIGHERA:
15124 case R_PPC64_TPREL16_HIGHESTA:
15125 case R_PPC64_DTPREL16_HA:
15126 case R_PPC64_DTPREL16_HIGHA:
15127 case R_PPC64_DTPREL16_HIGHERA:
15128 case R_PPC64_DTPREL16_HIGHESTA:
15129 /* It's just possible that this symbol is a weak symbol
15130 that's not actually defined anywhere. In that case,
15131 'sec' would be NULL, and we should leave the symbol
15132 alone (it will be set to zero elsewhere in the link). */
15133 if (sec == NULL)
15134 break;
15135 /* Fall through. */
15136
15137 case R_PPC64_GOT16_HA:
15138 case R_PPC64_PLTGOT16_HA:
15139 case R_PPC64_PLT16_HA:
15140 case R_PPC64_GOT_TLSGD16_HA:
15141 case R_PPC64_GOT_TLSLD16_HA:
15142 case R_PPC64_GOT_TPREL16_HA:
15143 case R_PPC64_GOT_DTPREL16_HA:
15144 /* Add 0x10000 if sign bit in 0:15 is set.
15145 Bits 0:15 are not used. */
15146 addend += 0x8000;
15147 break;
15148
15149 case R_PPC64_ADDR16_DS:
15150 case R_PPC64_ADDR16_LO_DS:
15151 case R_PPC64_GOT16_DS:
15152 case R_PPC64_GOT16_LO_DS:
15153 case R_PPC64_PLT16_LO_DS:
15154 case R_PPC64_SECTOFF_DS:
15155 case R_PPC64_SECTOFF_LO_DS:
15156 case R_PPC64_TOC16_DS:
15157 case R_PPC64_TOC16_LO_DS:
15158 case R_PPC64_PLTGOT16_DS:
15159 case R_PPC64_PLTGOT16_LO_DS:
15160 case R_PPC64_GOT_TPREL16_DS:
15161 case R_PPC64_GOT_TPREL16_LO_DS:
15162 case R_PPC64_GOT_DTPREL16_DS:
15163 case R_PPC64_GOT_DTPREL16_LO_DS:
15164 case R_PPC64_TPREL16_DS:
15165 case R_PPC64_TPREL16_LO_DS:
15166 case R_PPC64_DTPREL16_DS:
15167 case R_PPC64_DTPREL16_LO_DS:
15168 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15169 mask = 3;
15170 /* If this reloc is against an lq, lxv, or stxv insn, then
15171 the value must be a multiple of 16. This is somewhat of
15172 a hack, but the "correct" way to do this by defining _DQ
15173 forms of all the _DS relocs bloats all reloc switches in
15174 this file. It doesn't make much sense to use these
15175 relocs in data, so testing the insn should be safe. */
15176 if ((insn & (0x3f << 26)) == (56u << 26)
15177 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15178 mask = 15;
15179 relocation += addend;
15180 addend = insn & (mask ^ 3);
15181 if ((relocation & mask) != 0)
15182 {
15183 relocation ^= relocation & mask;
15184 info->callbacks->einfo
15185 /* xgettext:c-format */
15186 (_("%H: error: %s not a multiple of %u\n"),
15187 input_bfd, input_section, rel->r_offset,
15188 howto->name,
15189 mask + 1);
15190 bfd_set_error (bfd_error_bad_value);
15191 ret = FALSE;
15192 goto copy_reloc;
15193 }
15194 break;
15195 }
15196
15197 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15198 because such sections are not SEC_ALLOC and thus ld.so will
15199 not process them. */
15200 if (unresolved_reloc
15201 && !((input_section->flags & SEC_DEBUGGING) != 0
15202 && h->elf.def_dynamic)
15203 && _bfd_elf_section_offset (output_bfd, info, input_section,
15204 rel->r_offset) != (bfd_vma) -1)
15205 {
15206 info->callbacks->einfo
15207 /* xgettext:c-format */
15208 (_("%H: unresolvable %s against `%T'\n"),
15209 input_bfd, input_section, rel->r_offset,
15210 howto->name,
15211 h->elf.root.root.string);
15212 ret = FALSE;
15213 }
15214
15215 /* 16-bit fields in insns mostly have signed values, but a
15216 few insns have 16-bit unsigned values. Really, we should
15217 have different reloc types. */
15218 if (howto->complain_on_overflow != complain_overflow_dont
15219 && howto->dst_mask == 0xffff
15220 && (input_section->flags & SEC_CODE) != 0)
15221 {
15222 enum complain_overflow complain = complain_overflow_signed;
15223
15224 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15225 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15226 complain = complain_overflow_bitfield;
15227 else if (howto->rightshift == 0
15228 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15229 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15230 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15231 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15232 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15233 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15234 complain = complain_overflow_unsigned;
15235 if (howto->complain_on_overflow != complain)
15236 {
15237 alt_howto = *howto;
15238 alt_howto.complain_on_overflow = complain;
15239 howto = &alt_howto;
15240 }
15241 }
15242
15243 if (r_type == R_PPC64_REL16DX_HA)
15244 {
15245 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15246 if (rel->r_offset + 4 > input_section->size)
15247 r = bfd_reloc_outofrange;
15248 else
15249 {
15250 relocation += addend;
15251 relocation -= (rel->r_offset
15252 + input_section->output_offset
15253 + input_section->output_section->vma);
15254 relocation = (bfd_signed_vma) relocation >> 16;
15255 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15256 insn &= ~0x1fffc1;
15257 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15258 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15259 r = bfd_reloc_ok;
15260 if (relocation + 0x8000 > 0xffff)
15261 r = bfd_reloc_overflow;
15262 }
15263 }
15264 else
15265 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15266 rel->r_offset, relocation, addend);
15267
15268 if (r != bfd_reloc_ok)
15269 {
15270 char *more_info = NULL;
15271 const char *reloc_name = howto->name;
15272
15273 if (reloc_dest != DEST_NORMAL)
15274 {
15275 more_info = bfd_malloc (strlen (reloc_name) + 8);
15276 if (more_info != NULL)
15277 {
15278 strcpy (more_info, reloc_name);
15279 strcat (more_info, (reloc_dest == DEST_OPD
15280 ? " (OPD)" : " (stub)"));
15281 reloc_name = more_info;
15282 }
15283 }
15284
15285 if (r == bfd_reloc_overflow)
15286 {
15287 /* On code like "if (foo) foo();" don't report overflow
15288 on a branch to zero when foo is undefined. */
15289 if (!warned
15290 && (reloc_dest == DEST_STUB
15291 || !(h != NULL
15292 && (h->elf.root.type == bfd_link_hash_undefweak
15293 || h->elf.root.type == bfd_link_hash_undefined)
15294 && is_branch_reloc (r_type))))
15295 info->callbacks->reloc_overflow (info, &h->elf.root,
15296 sym_name, reloc_name,
15297 orig_rel.r_addend,
15298 input_bfd, input_section,
15299 rel->r_offset);
15300 }
15301 else
15302 {
15303 info->callbacks->einfo
15304 /* xgettext:c-format */
15305 (_("%H: %s against `%T': error %d\n"),
15306 input_bfd, input_section, rel->r_offset,
15307 reloc_name, sym_name, (int) r);
15308 ret = FALSE;
15309 }
15310 if (more_info != NULL)
15311 free (more_info);
15312 }
15313 copy_reloc:
15314 if (wrel != rel)
15315 *wrel = *rel;
15316 }
15317
15318 if (wrel != rel)
15319 {
15320 Elf_Internal_Shdr *rel_hdr;
15321 size_t deleted = rel - wrel;
15322
15323 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15324 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15325 if (rel_hdr->sh_size == 0)
15326 {
15327 /* It is too late to remove an empty reloc section. Leave
15328 one NONE reloc.
15329 ??? What is wrong with an empty section??? */
15330 rel_hdr->sh_size = rel_hdr->sh_entsize;
15331 deleted -= 1;
15332 }
15333 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15334 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15335 input_section->reloc_count -= deleted;
15336 }
15337
15338 /* If we're emitting relocations, then shortly after this function
15339 returns, reloc offsets and addends for this section will be
15340 adjusted. Worse, reloc symbol indices will be for the output
15341 file rather than the input. Save a copy of the relocs for
15342 opd_entry_value. */
15343 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15344 {
15345 bfd_size_type amt;
15346 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15347 rel = bfd_alloc (input_bfd, amt);
15348 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15349 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15350 if (rel == NULL)
15351 return FALSE;
15352 memcpy (rel, relocs, amt);
15353 }
15354 return ret;
15355 }
15356
15357 /* Adjust the value of any local symbols in opd sections. */
15358
15359 static int
15360 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15361 const char *name ATTRIBUTE_UNUSED,
15362 Elf_Internal_Sym *elfsym,
15363 asection *input_sec,
15364 struct elf_link_hash_entry *h)
15365 {
15366 struct _opd_sec_data *opd;
15367 long adjust;
15368 bfd_vma value;
15369
15370 if (h != NULL)
15371 return 1;
15372
15373 opd = get_opd_info (input_sec);
15374 if (opd == NULL || opd->adjust == NULL)
15375 return 1;
15376
15377 value = elfsym->st_value - input_sec->output_offset;
15378 if (!bfd_link_relocatable (info))
15379 value -= input_sec->output_section->vma;
15380
15381 adjust = opd->adjust[OPD_NDX (value)];
15382 if (adjust == -1)
15383 return 2;
15384
15385 elfsym->st_value += adjust;
15386 return 1;
15387 }
15388
15389 /* Finish up dynamic symbol handling. We set the contents of various
15390 dynamic sections here. */
15391
15392 static bfd_boolean
15393 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15394 struct bfd_link_info *info,
15395 struct elf_link_hash_entry *h,
15396 Elf_Internal_Sym *sym)
15397 {
15398 struct ppc_link_hash_table *htab;
15399 struct plt_entry *ent;
15400 Elf_Internal_Rela rela;
15401 bfd_byte *loc;
15402
15403 htab = ppc_hash_table (info);
15404 if (htab == NULL)
15405 return FALSE;
15406
15407 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15408 if (ent->plt.offset != (bfd_vma) -1)
15409 {
15410 /* This symbol has an entry in the procedure linkage
15411 table. Set it up. */
15412 if (!htab->elf.dynamic_sections_created
15413 || h->dynindx == -1)
15414 {
15415 BFD_ASSERT (h->type == STT_GNU_IFUNC
15416 && h->def_regular
15417 && (h->root.type == bfd_link_hash_defined
15418 || h->root.type == bfd_link_hash_defweak));
15419 rela.r_offset = (htab->elf.iplt->output_section->vma
15420 + htab->elf.iplt->output_offset
15421 + ent->plt.offset);
15422 if (htab->opd_abi)
15423 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15424 else
15425 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15426 rela.r_addend = (h->root.u.def.value
15427 + h->root.u.def.section->output_offset
15428 + h->root.u.def.section->output_section->vma
15429 + ent->addend);
15430 loc = (htab->elf.irelplt->contents
15431 + (htab->elf.irelplt->reloc_count++
15432 * sizeof (Elf64_External_Rela)));
15433 htab->local_ifunc_resolver = 1;
15434 }
15435 else
15436 {
15437 rela.r_offset = (htab->elf.splt->output_section->vma
15438 + htab->elf.splt->output_offset
15439 + ent->plt.offset);
15440 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15441 rela.r_addend = ent->addend;
15442 loc = (htab->elf.srelplt->contents
15443 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15444 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15445 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15446 htab->maybe_local_ifunc_resolver = 1;
15447 }
15448 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15449
15450 if (!htab->opd_abi)
15451 {
15452 if (!h->def_regular)
15453 {
15454 /* Mark the symbol as undefined, rather than as
15455 defined in glink. Leave the value if there were
15456 any relocations where pointer equality matters
15457 (this is a clue for the dynamic linker, to make
15458 function pointer comparisons work between an
15459 application and shared library), otherwise set it
15460 to zero. */
15461 sym->st_shndx = SHN_UNDEF;
15462 if (!h->pointer_equality_needed)
15463 sym->st_value = 0;
15464 else if (!h->ref_regular_nonweak)
15465 {
15466 /* This breaks function pointer comparisons, but
15467 that is better than breaking tests for a NULL
15468 function pointer. */
15469 sym->st_value = 0;
15470 }
15471 }
15472 }
15473 }
15474
15475 if (h->needs_copy)
15476 {
15477 /* This symbol needs a copy reloc. Set it up. */
15478 asection *srel;
15479
15480 if (h->dynindx == -1
15481 || (h->root.type != bfd_link_hash_defined
15482 && h->root.type != bfd_link_hash_defweak)
15483 || htab->elf.srelbss == NULL
15484 || htab->elf.sreldynrelro == NULL)
15485 abort ();
15486
15487 rela.r_offset = (h->root.u.def.value
15488 + h->root.u.def.section->output_section->vma
15489 + h->root.u.def.section->output_offset);
15490 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15491 rela.r_addend = 0;
15492 if (h->root.u.def.section == htab->elf.sdynrelro)
15493 srel = htab->elf.sreldynrelro;
15494 else
15495 srel = htab->elf.srelbss;
15496 loc = srel->contents;
15497 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15498 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15499 }
15500
15501 return TRUE;
15502 }
15503
15504 /* Used to decide how to sort relocs in an optimal manner for the
15505 dynamic linker, before writing them out. */
15506
15507 static enum elf_reloc_type_class
15508 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15509 const asection *rel_sec,
15510 const Elf_Internal_Rela *rela)
15511 {
15512 enum elf_ppc64_reloc_type r_type;
15513 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15514
15515 if (rel_sec == htab->elf.irelplt)
15516 return reloc_class_ifunc;
15517
15518 r_type = ELF64_R_TYPE (rela->r_info);
15519 switch (r_type)
15520 {
15521 case R_PPC64_RELATIVE:
15522 return reloc_class_relative;
15523 case R_PPC64_JMP_SLOT:
15524 return reloc_class_plt;
15525 case R_PPC64_COPY:
15526 return reloc_class_copy;
15527 default:
15528 return reloc_class_normal;
15529 }
15530 }
15531
15532 /* Finish up the dynamic sections. */
15533
15534 static bfd_boolean
15535 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15536 struct bfd_link_info *info)
15537 {
15538 struct ppc_link_hash_table *htab;
15539 bfd *dynobj;
15540 asection *sdyn;
15541
15542 htab = ppc_hash_table (info);
15543 if (htab == NULL)
15544 return FALSE;
15545
15546 dynobj = htab->elf.dynobj;
15547 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15548
15549 if (htab->elf.dynamic_sections_created)
15550 {
15551 Elf64_External_Dyn *dyncon, *dynconend;
15552
15553 if (sdyn == NULL || htab->elf.sgot == NULL)
15554 abort ();
15555
15556 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15557 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15558 for (; dyncon < dynconend; dyncon++)
15559 {
15560 Elf_Internal_Dyn dyn;
15561 asection *s;
15562
15563 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15564
15565 switch (dyn.d_tag)
15566 {
15567 default:
15568 continue;
15569
15570 case DT_PPC64_GLINK:
15571 s = htab->glink;
15572 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15573 /* We stupidly defined DT_PPC64_GLINK to be the start
15574 of glink rather than the first entry point, which is
15575 what ld.so needs, and now have a bigger stub to
15576 support automatic multiple TOCs. */
15577 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15578 break;
15579
15580 case DT_PPC64_OPD:
15581 s = bfd_get_section_by_name (output_bfd, ".opd");
15582 if (s == NULL)
15583 continue;
15584 dyn.d_un.d_ptr = s->vma;
15585 break;
15586
15587 case DT_PPC64_OPT:
15588 if (htab->do_multi_toc && htab->multi_toc_needed)
15589 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15590 if (htab->has_plt_localentry0)
15591 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15592 break;
15593
15594 case DT_PPC64_OPDSZ:
15595 s = bfd_get_section_by_name (output_bfd, ".opd");
15596 if (s == NULL)
15597 continue;
15598 dyn.d_un.d_val = s->size;
15599 break;
15600
15601 case DT_PLTGOT:
15602 s = htab->elf.splt;
15603 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15604 break;
15605
15606 case DT_JMPREL:
15607 s = htab->elf.srelplt;
15608 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15609 break;
15610
15611 case DT_PLTRELSZ:
15612 dyn.d_un.d_val = htab->elf.srelplt->size;
15613 break;
15614
15615 case DT_TEXTREL:
15616 if (htab->local_ifunc_resolver)
15617 info->callbacks->einfo
15618 (_("%X%P: text relocations and GNU indirect "
15619 "functions will result in a segfault at runtime\n"));
15620 else if (htab->maybe_local_ifunc_resolver)
15621 info->callbacks->einfo
15622 (_("%P: warning: text relocations and GNU indirect "
15623 "functions may result in a segfault at runtime\n"));
15624 continue;
15625 }
15626
15627 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15628 }
15629 }
15630
15631 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15632 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15633 {
15634 /* Fill in the first entry in the global offset table.
15635 We use it to hold the link-time TOCbase. */
15636 bfd_put_64 (output_bfd,
15637 elf_gp (output_bfd) + TOC_BASE_OFF,
15638 htab->elf.sgot->contents);
15639
15640 /* Set .got entry size. */
15641 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15642 }
15643
15644 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15645 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15646 {
15647 /* Set .plt entry size. */
15648 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15649 = PLT_ENTRY_SIZE (htab);
15650 }
15651
15652 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15653 brlt ourselves if emitrelocations. */
15654 if (htab->brlt != NULL
15655 && htab->brlt->reloc_count != 0
15656 && !_bfd_elf_link_output_relocs (output_bfd,
15657 htab->brlt,
15658 elf_section_data (htab->brlt)->rela.hdr,
15659 elf_section_data (htab->brlt)->relocs,
15660 NULL))
15661 return FALSE;
15662
15663 if (htab->glink != NULL
15664 && htab->glink->reloc_count != 0
15665 && !_bfd_elf_link_output_relocs (output_bfd,
15666 htab->glink,
15667 elf_section_data (htab->glink)->rela.hdr,
15668 elf_section_data (htab->glink)->relocs,
15669 NULL))
15670 return FALSE;
15671
15672 if (htab->glink_eh_frame != NULL
15673 && htab->glink_eh_frame->size != 0)
15674 {
15675 bfd_vma val;
15676 bfd_byte *p;
15677 struct map_stub *group;
15678 size_t align = 4;
15679
15680 p = htab->glink_eh_frame->contents;
15681 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15682
15683 for (group = htab->group; group != NULL; group = group->next)
15684 if (group->stub_sec != NULL)
15685 {
15686 /* Offset to stub section. */
15687 val = (group->stub_sec->output_section->vma
15688 + group->stub_sec->output_offset);
15689 val -= (htab->glink_eh_frame->output_section->vma
15690 + htab->glink_eh_frame->output_offset
15691 + (p + 8 - htab->glink_eh_frame->contents));
15692 if (val + 0x80000000 > 0xffffffff)
15693 {
15694 info->callbacks->einfo
15695 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15696 group->stub_sec->name);
15697 return FALSE;
15698 }
15699 bfd_put_32 (dynobj, val, p + 8);
15700 p += stub_eh_frame_size (group, align);
15701 }
15702 if (htab->glink != NULL && htab->glink->size != 0)
15703 {
15704 /* Offset to .glink. */
15705 val = (htab->glink->output_section->vma
15706 + htab->glink->output_offset
15707 + 8);
15708 val -= (htab->glink_eh_frame->output_section->vma
15709 + htab->glink_eh_frame->output_offset
15710 + (p + 8 - htab->glink_eh_frame->contents));
15711 if (val + 0x80000000 > 0xffffffff)
15712 {
15713 info->callbacks->einfo
15714 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15715 htab->glink->name);
15716 return FALSE;
15717 }
15718 bfd_put_32 (dynobj, val, p + 8);
15719 p += (24 + align - 1) & -align;
15720 }
15721
15722 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15723 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15724 htab->glink_eh_frame,
15725 htab->glink_eh_frame->contents))
15726 return FALSE;
15727 }
15728
15729 /* We need to handle writing out multiple GOT sections ourselves,
15730 since we didn't add them to DYNOBJ. We know dynobj is the first
15731 bfd. */
15732 while ((dynobj = dynobj->link.next) != NULL)
15733 {
15734 asection *s;
15735
15736 if (!is_ppc64_elf (dynobj))
15737 continue;
15738
15739 s = ppc64_elf_tdata (dynobj)->got;
15740 if (s != NULL
15741 && s->size != 0
15742 && s->output_section != bfd_abs_section_ptr
15743 && !bfd_set_section_contents (output_bfd, s->output_section,
15744 s->contents, s->output_offset,
15745 s->size))
15746 return FALSE;
15747 s = ppc64_elf_tdata (dynobj)->relgot;
15748 if (s != NULL
15749 && s->size != 0
15750 && s->output_section != bfd_abs_section_ptr
15751 && !bfd_set_section_contents (output_bfd, s->output_section,
15752 s->contents, s->output_offset,
15753 s->size))
15754 return FALSE;
15755 }
15756
15757 return TRUE;
15758 }
15759
15760 #include "elf64-target.h"
15761
15762 /* FreeBSD support */
15763
15764 #undef TARGET_LITTLE_SYM
15765 #undef TARGET_LITTLE_NAME
15766
15767 #undef TARGET_BIG_SYM
15768 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15769 #undef TARGET_BIG_NAME
15770 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15771
15772 #undef ELF_OSABI
15773 #define ELF_OSABI ELFOSABI_FREEBSD
15774
15775 #undef elf64_bed
15776 #define elf64_bed elf64_powerpc_fbsd_bed
15777
15778 #include "elf64-target.h"