1 /* x86 specific support for ELF
2 Copyright (C) 2017 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
26 #include "bfd_stdint.h"
29 #define PLT_CIE_LENGTH 20
30 #define PLT_FDE_LENGTH 36
31 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
32 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
34 #define ABI_64_P(abfd) \
35 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
37 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
38 copying dynamic variables from a shared lib into an app's dynbss
39 section, and instead use a dynamic relocation to point into the
41 #define ELIMINATE_COPY_RELOCS 1
43 #define elf_x86_hash_table(p, id) \
44 (is_elf_hash_table ((p)->hash) \
45 && elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) == (id) \
46 ? ((struct elf_x86_link_hash_table *) ((p)->hash)) : NULL)
48 /* Will references to this symbol always be local in this object? */
49 #define SYMBOL_REFERENCES_LOCAL_P(INFO, H) \
50 _bfd_x86_elf_link_symbol_references_local ((INFO), (H))
52 /* Is a undefined weak symbol which is resolved to 0. Reference to an
53 undefined weak symbol is resolved to 0 when building executable if
55 1. Has non-GOT/non-PLT relocations in text section. Or
56 2. Has no GOT/PLT relocation.
57 Local undefined weak symbol is always resolved to 0.
59 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \
60 ((EH)->elf.root.type == bfd_link_hash_undefweak \
61 && (SYMBOL_REFERENCES_LOCAL_P ((INFO), &(EH)->elf) \
62 || (bfd_link_executable (INFO) \
63 && (!(EH)->has_got_reloc \
64 || (EH)->has_non_got_reloc))))
66 /* Should copy relocation be generated for a symbol. Don't generate
67 copy relocation against a protected symbol defined in a shared
68 object with GNU_PROPERTY_NO_COPY_ON_PROTECTED. */
69 #define SYMBOL_NO_COPYRELOC(INFO, EH) \
70 ((EH)->def_protected \
71 && ((EH)->elf.root.type == bfd_link_hash_defined \
72 || (EH)->elf.root.type == bfd_link_hash_defweak) \
73 && elf_has_no_copy_on_protected ((EH)->elf.root.u.def.section->owner) \
74 && ((EH)->elf.root.u.def.section->owner->flags & DYNAMIC) != 0 \
75 && ((EH)->elf.root.u.def.section->flags & SEC_CODE) == 0)
77 /* TRUE if dynamic relocation is needed. If we are creating a shared
78 library, and this is a reloc against a global symbol, or a non PC
79 relative reloc against a local symbol, then we need to copy the reloc
80 into the shared library. However, if we are linking with -Bsymbolic,
81 we do not need to copy a reloc against a global symbol which is
82 defined in an object we are including in the link (i.e., DEF_REGULAR
83 is set). At this point we have not seen all the input files, so it
84 is possible that DEF_REGULAR is not set now but will be set later (it
85 is never cleared). In case of a weak definition, DEF_REGULAR may be
86 cleared later by a strong definition in a shared library. We account
87 for that possibility below by storing information in the relocs_copied
88 field of the hash table entry. A similar situation occurs when
89 creating shared libraries and symbol visibility changes render the
92 If on the other hand, we are creating an executable, we may need to
93 keep relocations for symbols satisfied by a dynamic library if we
94 manage to avoid copy relocs for the symbol.
96 We also need to generate dynamic pointer relocation against
97 STT_GNU_IFUNC symbol in the non-code section. */
98 #define NEED_DYNAMIC_RELOCATION_P(INFO, H, SEC, R_TYPE, POINTER_TYPE) \
99 ((bfd_link_pic (INFO) \
100 && (! X86_PCREL_TYPE_P (R_TYPE) \
102 && (! (bfd_link_pie (INFO) \
103 || SYMBOLIC_BIND ((INFO), (H))) \
104 || (H)->root.type == bfd_link_hash_defweak \
105 || !(H)->def_regular)))) \
107 && (H)->type == STT_GNU_IFUNC \
108 && (R_TYPE) == POINTER_TYPE \
109 && ((SEC)->flags & SEC_CODE) == 0) \
110 || (ELIMINATE_COPY_RELOCS \
111 && !bfd_link_pic (INFO) \
113 && ((H)->root.type == bfd_link_hash_defweak \
114 || !(H)->def_regular)))
116 /* TRUE if dynamic relocation should be generated. Don't copy a
117 pc-relative relocation into the output file if the symbol needs
118 copy reloc or the symbol is undefined when building executable.
119 Copy dynamic function pointer relocations. Don't generate dynamic
120 relocations against resolved undefined weak symbols in PIE, except
121 when PC32_RELOC is TRUE. Undefined weak symbol is bound locally
122 when PIC is false. */
123 #define GENERATE_DYNAMIC_RELOCATION_P(INFO, EH, R_TYPE, \
124 NEED_COPY_RELOC_IN_PIE, \
125 RESOLVED_TO_ZERO, PC32_RELOC) \
126 ((bfd_link_pic (INFO) \
127 && !(NEED_COPY_RELOC_IN_PIE) \
129 || ((ELF_ST_VISIBILITY ((EH)->elf.other) == STV_DEFAULT \
130 && (!(RESOLVED_TO_ZERO) || PC32_RELOC)) \
131 || (EH)->elf.root.type != bfd_link_hash_undefweak)) \
132 && ((!X86_PCREL_TYPE_P (R_TYPE) \
133 && !X86_SIZE_TYPE_P (R_TYPE)) \
134 || ! SYMBOL_CALLS_LOCAL ((INFO), &(EH)->elf))) \
135 || (ELIMINATE_COPY_RELOCS \
136 && !bfd_link_pic (INFO) \
138 && (EH)->elf.dynindx != -1 \
139 && (!(EH)->elf.non_got_ref \
140 || (EH)->func_pointer_refcount > 0 \
141 || ((EH)->elf.root.type == bfd_link_hash_undefweak \
142 && !(RESOLVED_TO_ZERO))) \
143 && (((EH)->elf.def_dynamic && !(EH)->elf.def_regular) \
144 || (EH)->elf.root.type == bfd_link_hash_undefined)))
146 /* TRUE if this input relocation should be copied to output. H->dynindx
147 may be -1 if this symbol was marked to become local. */
148 #define COPY_INPUT_RELOC_P(INFO, H, R_TYPE) \
150 && (H)->dynindx != -1 \
151 && (X86_PCREL_TYPE_P (R_TYPE) \
152 || !(bfd_link_executable (INFO) || SYMBOLIC_BIND ((INFO), (H))) \
153 || !(H)->def_regular))
155 /* TRUE if this is actually a static link, or it is a -Bsymbolic link
156 and the symbol is defined locally, or the symbol was forced to be
157 local because of a version file. */
158 #define RESOLVED_LOCALLY_P(INFO, H, HTAB) \
159 (!WILL_CALL_FINISH_DYNAMIC_SYMBOL ((HTAB)->elf.dynamic_sections_created, \
160 bfd_link_pic (INFO), (H)) \
161 || (bfd_link_pic (INFO) \
162 && SYMBOL_REFERENCES_LOCAL_P ((INFO), (H))) \
163 || (ELF_ST_VISIBILITY ((H)->other) \
164 && (H)->root.type == bfd_link_hash_undefweak))
166 /* TRUE if relative relocation should be generated. GOT reference to
167 global symbol in PIC will lead to dynamic symbol. It becomes a
168 problem when "time" or "times" is defined as a variable in an
169 executable, clashing with functions of the same name in libc. If a
170 symbol isn't undefined weak symbol, don't make it dynamic in PIC and
171 generate relative relocation. */
172 #define GENERATE_RELATIVE_RELOC_P(INFO, H) \
173 ((H)->dynindx == -1 \
174 && !(H)->forced_local \
175 && (H)->root.type != bfd_link_hash_undefweak \
176 && bfd_link_pic (INFO))
178 /* TRUE if this is a pointer reference to a local IFUNC. */
179 #define POINTER_LOCAL_IFUNC_P(INFO, H) \
180 ((H)->dynindx == -1 \
181 || (H)->forced_local \
182 || bfd_link_executable (INFO))
184 /* TRUE if this is a PLT reference to a local IFUNC. */
185 #define PLT_LOCAL_IFUNC_P(INFO, H) \
186 ((H)->dynindx == -1 \
187 || ((bfd_link_executable (INFO) \
188 || ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT) \
189 && (H)->def_regular \
190 && (H)->type == STT_GNU_IFUNC))
192 /* TRUE if TLS IE->LE transition is OK. */
193 #define TLS_TRANSITION_IE_TO_LE_P(INFO, H, TLS_TYPE) \
194 (bfd_link_executable (INFO) \
196 && (H)->dynindx == -1 \
197 && (TLS_TYPE & GOT_TLS_IE))
199 /* Verify that the symbol has an entry in the procedure linkage table. */
200 #define VERIFY_PLT_ENTRY(INFO, H, PLT, GOTPLT, RELPLT, LOCAL_UNDEFWEAK) \
201 if (((H)->dynindx == -1 \
202 && !LOCAL_UNDEFWEAK \
203 && !(((H)->forced_local || bfd_link_executable (INFO)) \
204 && (H)->def_regular \
205 && (H)->type == STT_GNU_IFUNC)) \
207 || (GOTPLT) == NULL \
208 || (RELPLT) == NULL) \
211 /* Verify that the symbol supports copy relocation. */
212 #define VERIFY_COPY_RELOC(H, HTAB) \
213 if ((H)->dynindx == -1 \
214 || ((H)->root.type != bfd_link_hash_defined \
215 && (H)->root.type != bfd_link_hash_defweak) \
216 || (HTAB)->elf.srelbss == NULL \
217 || (HTAB)->elf.sreldynrelro == NULL) \
220 /* x86 ELF linker hash entry. */
222 struct elf_x86_link_hash_entry
224 struct elf_link_hash_entry elf;
226 /* Track dynamic relocs copied for this symbol. */
227 struct elf_dyn_relocs *dyn_relocs;
229 unsigned char tls_type;
231 /* TRUE if symbol has GOT or PLT relocations. */
232 unsigned int has_got_reloc : 1;
234 /* TRUE if symbol has non-GOT/non-PLT relocations in text sections. */
235 unsigned int has_non_got_reloc : 1;
237 /* Don't call finish_dynamic_symbol on this symbol. */
238 unsigned int no_finish_dynamic_symbol : 1;
240 /* TRUE if symbol is __tls_get_addr. */
241 unsigned int tls_get_addr : 1;
243 /* TRUE if symbol is defined as a protected symbol. */
244 unsigned int def_protected : 1;
246 /* 0: Symbol references are unknown.
247 1: Symbol references aren't local.
248 2: Symbol references are local.
250 unsigned int local_ref : 2;
252 /* TRUE if symbol is defined by linker. */
253 unsigned int linker_def : 1;
255 /* TRUE if symbol is referenced by R_386_GOTOFF relocation. This is
256 only used by i386. */
257 unsigned int gotoff_ref : 1;
259 /* TRUE if a weak symbol with a real definition needs a copy reloc.
260 When there is a weak symbol with a real definition, the processor
261 independent code will have arranged for us to see the real
262 definition first. We need to copy the needs_copy bit from the
263 real definition and check it when allowing copy reloc in PIE. This
264 is only used by x86-64. */
265 unsigned int needs_copy : 1;
267 /* Reference count of C/C++ function pointer relocations in read-write
268 section which can be resolved at run-time. */
269 bfd_signed_vma func_pointer_refcount;
271 /* Information about the GOT PLT entry. Filled when there are both
272 GOT and PLT relocations against the same function. */
273 union gotplt_union plt_got;
275 /* Information about the second PLT entry. */
276 union gotplt_union plt_second;
278 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
279 starting at the end of the jump table. */
283 struct elf_x86_lazy_plt_layout
285 /* The first entry in an absolute lazy procedure linkage table looks
287 const bfd_byte *plt0_entry;
288 unsigned int plt0_entry_size; /* Size of PLT0 entry. */
290 /* Later entries in an absolute lazy procedure linkage table look
292 const bfd_byte *plt_entry;
293 unsigned int plt_entry_size; /* Size of each PLT entry. */
295 /* Offsets into plt0_entry that are to be replaced with GOT[1] and
297 unsigned int plt0_got1_offset;
298 unsigned int plt0_got2_offset;
300 /* Offset of the end of the PC-relative instruction containing
301 plt0_got2_offset. This is for x86-64 only. */
302 unsigned int plt0_got2_insn_end;
304 /* Offsets into plt_entry that are to be replaced with... */
305 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
306 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
307 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
309 /* Length of the PC-relative instruction containing plt_got_offset.
310 This is used for x86-64 only. */
311 unsigned int plt_got_insn_size;
313 /* Offset of the end of the PC-relative jump to plt0_entry. This is
314 used for x86-64 only. */
315 unsigned int plt_plt_insn_end;
317 /* Offset into plt_entry where the initial value of the GOT entry
319 unsigned int plt_lazy_offset;
321 /* The first entry in a PIC lazy procedure linkage table looks like
323 const bfd_byte *pic_plt0_entry;
325 /* Subsequent entries in a PIC lazy procedure linkage table look
327 const bfd_byte *pic_plt_entry;
329 /* .eh_frame covering the lazy .plt section. */
330 const bfd_byte *eh_frame_plt;
331 unsigned int eh_frame_plt_size;
334 struct elf_x86_non_lazy_plt_layout
336 /* Entries in an absolute non-lazy procedure linkage table look like
338 const bfd_byte *plt_entry;
339 /* Entries in a PIC non-lazy procedure linkage table look like this. */
340 const bfd_byte *pic_plt_entry;
342 unsigned int plt_entry_size; /* Size of each PLT entry. */
344 /* Offsets into plt_entry that are to be replaced with... */
345 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
347 /* Length of the PC-relative instruction containing plt_got_offset.
348 This is used for x86-64 only. */
349 unsigned int plt_got_insn_size;
351 /* .eh_frame covering the non-lazy .plt section. */
352 const bfd_byte *eh_frame_plt;
353 unsigned int eh_frame_plt_size;
356 struct elf_x86_plt_layout
358 /* The first entry in a lazy procedure linkage table looks like this.
359 This is only used for i386 where absolute PLT0 and PIC PLT0 are
361 const bfd_byte *plt0_entry;
362 /* Entries in a procedure linkage table look like this. */
363 const bfd_byte *plt_entry;
364 unsigned int plt_entry_size; /* Size of each PLT entry. */
367 unsigned int has_plt0;
369 /* Offsets into plt_entry that are to be replaced with... */
370 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
372 /* Length of the PC-relative instruction containing plt_got_offset.
373 This is only used for x86-64. */
374 unsigned int plt_got_insn_size;
376 /* .eh_frame covering the .plt section. */
377 const bfd_byte *eh_frame_plt;
378 unsigned int eh_frame_plt_size;
381 /* Values in tls_type of x86 ELF linker hash entry. */
382 #define GOT_UNKNOWN 0
386 #define GOT_TLS_IE_POS 5
387 #define GOT_TLS_IE_NEG 6
388 #define GOT_TLS_IE_BOTH 7
389 #define GOT_TLS_GDESC 8
390 #define GOT_TLS_GD_BOTH_P(type) \
391 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
392 #define GOT_TLS_GD_P(type) \
393 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
394 #define GOT_TLS_GDESC_P(type) \
395 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
396 #define GOT_TLS_GD_ANY_P(type) \
397 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
399 #define elf_x86_hash_entry(ent) \
400 ((struct elf_x86_link_hash_entry *)(ent))
402 /* x86 ELF linker hash table. */
404 struct elf_x86_link_hash_table
406 struct elf_link_hash_table elf;
408 /* Short-cuts to get to dynamic linker sections. */
410 asection *plt_eh_frame;
411 asection *plt_second;
412 asection *plt_second_eh_frame;
414 asection *plt_got_eh_frame;
416 /* Parameters describing PLT generation, lazy or non-lazy. */
417 struct elf_x86_plt_layout plt;
419 /* Parameters describing lazy PLT generation. */
420 const struct elf_x86_lazy_plt_layout *lazy_plt;
422 /* Parameters describing non-lazy PLT generation. */
423 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
427 bfd_signed_vma refcount;
431 /* The amount of space used by the jump slots in the GOT. */
432 bfd_vma sgotplt_jump_table_size;
434 /* Small local sym cache. */
435 struct sym_cache sym_cache;
437 /* _TLS_MODULE_BASE_ symbol. */
438 struct bfd_link_hash_entry *tls_module_base;
440 /* Used by local STT_GNU_IFUNC symbols. */
441 htab_t loc_hash_table;
442 void * loc_hash_memory;
444 /* The offset into sgot of the GOT entry used by the PLT entry
448 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
449 bfd_vma next_jump_slot_index;
450 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
451 bfd_vma next_irelative_index;
453 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
454 to read-only sections. */
455 bfd_boolean readonly_dynrelocs_against_ifunc;
457 /* TRUE if this is a VxWorks x86 target. This is only used for
459 bfd_boolean is_vxworks;
461 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks.
462 This is used for i386 only. */
465 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. This
466 is only used for i386. */
467 bfd_vma next_tls_desc_index;
469 /* The offset into splt of the PLT entry for the TLS descriptor
470 resolver. Special values are 0, if not necessary (or not found
471 to be necessary yet), and -1 if needed but not determined
472 yet. This is only used for x86-64. */
475 bfd_vma (*r_info) (bfd_vma, bfd_vma);
476 bfd_vma (*r_sym) (bfd_vma);
477 bfd_boolean (*is_reloc_section) (const char *);
478 enum elf_target_id target_id;
479 unsigned int sizeof_reloc;
480 unsigned int dt_reloc;
481 unsigned int dt_reloc_sz;
482 unsigned int dt_reloc_ent;
483 unsigned int got_entry_size;
484 unsigned int pointer_r_type;
485 int dynamic_interpreter_size;
486 const char *dynamic_interpreter;
487 const char *tls_get_addr;
490 struct elf_x86_init_table
492 /* The lazy PLT layout. */
493 const struct elf_x86_lazy_plt_layout *lazy_plt;
495 /* The non-lazy PLT layout. */
496 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
498 /* The lazy PLT layout for IBT. */
499 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
501 /* The non-lazy PLT layout for IBT. */
502 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
504 /* TRUE if this is a normal x86 target. */
505 bfd_boolean normal_target;
507 /* TRUE if this is a VxWorks x86 target. */
508 bfd_boolean is_vxworks;
510 bfd_vma (*r_info) (bfd_vma, bfd_vma);
511 bfd_vma (*r_sym) (bfd_vma);
514 struct elf_x86_obj_tdata
516 struct elf_obj_tdata root;
518 /* tls_type for each local got entry. */
519 char *local_got_tls_type;
521 /* GOTPLT entries for TLS descriptors. */
522 bfd_vma *local_tlsdesc_gotent;
525 enum elf_x86_plt_type
539 enum elf_x86_plt_type type;
540 unsigned int plt_got_offset;
541 unsigned int plt_entry_size;
542 unsigned int plt_got_insn_size; /* Only used for x86-64. */
546 #define elf_x86_tdata(abfd) \
547 ((struct elf_x86_obj_tdata *) (abfd)->tdata.any)
549 #define elf_x86_local_got_tls_type(abfd) \
550 (elf_x86_tdata (abfd)->local_got_tls_type)
552 #define elf_x86_local_tlsdesc_gotent(abfd) \
553 (elf_x86_tdata (abfd)->local_tlsdesc_gotent)
555 #define elf_x86_compute_jump_table_size(htab) \
556 ((htab)->elf.srelplt->reloc_count * (htab)->got_entry_size)
558 #define is_x86_elf(bfd, htab) \
559 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
560 && elf_tdata (bfd) != NULL \
561 && elf_object_id (bfd) == (htab)->target_id)
563 extern bfd_boolean _bfd_x86_elf_mkobject
566 extern void _bfd_x86_elf_set_tls_module_base
567 (struct bfd_link_info *);
569 extern bfd_vma _bfd_x86_elf_dtpoff_base
570 (struct bfd_link_info *);
572 extern bfd_boolean _bfd_x86_elf_readonly_dynrelocs
573 (struct elf_link_hash_entry *, void *);
575 extern struct elf_link_hash_entry * _bfd_elf_x86_get_local_sym_hash
576 (struct elf_x86_link_hash_table *, bfd *, const Elf_Internal_Rela *,
579 extern hashval_t _bfd_x86_elf_local_htab_hash
582 extern int _bfd_x86_elf_local_htab_eq
583 (const void *, const void *);
585 extern struct bfd_hash_entry * _bfd_x86_elf_link_hash_newfunc
586 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
588 extern struct bfd_link_hash_table * _bfd_x86_elf_link_hash_table_create
591 extern int _bfd_x86_elf_compare_relocs
592 (const void *, const void *);
594 extern bfd_boolean _bfd_x86_elf_link_check_relocs
595 (bfd *, struct bfd_link_info *);
597 extern bfd_boolean _bfd_x86_elf_size_dynamic_sections
598 (bfd *, struct bfd_link_info *);
600 extern bfd_boolean _bfd_x86_elf_always_size_sections
601 (bfd *, struct bfd_link_info *);
603 extern void _bfd_x86_elf_merge_symbol_attribute
604 (struct elf_link_hash_entry *, const Elf_Internal_Sym *,
605 bfd_boolean, bfd_boolean);
607 extern void _bfd_x86_elf_copy_indirect_symbol
608 (struct bfd_link_info *, struct elf_link_hash_entry *,
609 struct elf_link_hash_entry *);
611 extern bfd_boolean _bfd_x86_elf_fixup_symbol
612 (struct bfd_link_info *, struct elf_link_hash_entry *);
614 extern bfd_boolean _bfd_x86_elf_hash_symbol
615 (struct elf_link_hash_entry *);
617 extern bfd_boolean _bfd_x86_elf_adjust_dynamic_symbol
618 (struct bfd_link_info *, struct elf_link_hash_entry *);
620 extern bfd_boolean _bfd_x86_elf_link_symbol_references_local
621 (struct bfd_link_info *, struct elf_link_hash_entry *);
623 extern asection * _bfd_x86_elf_gc_mark_hook
624 (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
625 struct elf_link_hash_entry *, Elf_Internal_Sym *);
627 extern long _bfd_x86_elf_get_synthetic_symtab
628 (bfd *, long, long, bfd_vma, struct elf_x86_plt [], asymbol **,
631 extern enum elf_property_kind _bfd_x86_elf_parse_gnu_properties
632 (bfd *, unsigned int, bfd_byte *, unsigned int);
634 extern bfd_boolean _bfd_x86_elf_merge_gnu_properties
635 (struct bfd_link_info *, bfd *, elf_property *, elf_property *);
637 extern bfd * _bfd_x86_elf_link_setup_gnu_properties
638 (struct bfd_link_info *, struct elf_x86_init_table *);
640 #define bfd_elf64_mkobject \
641 _bfd_x86_elf_mkobject
642 #define bfd_elf32_mkobject \
643 _bfd_x86_elf_mkobject
644 #define bfd_elf64_bfd_link_hash_table_create \
645 _bfd_x86_elf_link_hash_table_create
646 #define bfd_elf32_bfd_link_hash_table_create \
647 _bfd_x86_elf_link_hash_table_create
648 #define bfd_elf64_bfd_link_check_relocs \
649 _bfd_x86_elf_link_check_relocs
650 #define bfd_elf32_bfd_link_check_relocs \
651 _bfd_x86_elf_link_check_relocs
653 #define elf_backend_size_dynamic_sections \
654 _bfd_x86_elf_size_dynamic_sections
655 #define elf_backend_always_size_sections \
656 _bfd_x86_elf_always_size_sections
657 #define elf_backend_merge_symbol_attribute \
658 _bfd_x86_elf_merge_symbol_attribute
659 #define elf_backend_copy_indirect_symbol \
660 _bfd_x86_elf_copy_indirect_symbol
661 #define elf_backend_fixup_symbol \
662 _bfd_x86_elf_fixup_symbol
663 #define elf_backend_hash_symbol \
664 _bfd_x86_elf_hash_symbol
665 #define elf_backend_adjust_dynamic_symbol \
666 _bfd_x86_elf_adjust_dynamic_symbol
667 #define elf_backend_gc_mark_hook \
668 _bfd_x86_elf_gc_mark_hook
669 #define elf_backend_omit_section_dynsym \
670 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
671 #define elf_backend_parse_gnu_properties \
672 _bfd_x86_elf_parse_gnu_properties
673 #define elf_backend_merge_gnu_properties \
674 _bfd_x86_elf_merge_gnu_properties