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 /* TRUE if an undefined weak symbol should be resolved to 0. Local
53 undefined weak symbol is always resolved to 0. Reference to an
54 undefined weak symbol is resolved to 0 in executable if undefined
55 weak symbol should be resolved to 0 (zero_undefweak > 0). */
56 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \
57 ((EH)->elf.root.type == bfd_link_hash_undefweak \
58 && (SYMBOL_REFERENCES_LOCAL_P ((INFO), &(EH)->elf) \
59 || (bfd_link_executable (INFO) \
60 && (EH)->zero_undefweak > 0)))
62 /* Should copy relocation be generated for a symbol. Don't generate
63 copy relocation against a protected symbol defined in a shared
64 object with GNU_PROPERTY_NO_COPY_ON_PROTECTED. */
65 #define SYMBOL_NO_COPYRELOC(INFO, EH) \
66 ((EH)->def_protected \
67 && ((EH)->elf.root.type == bfd_link_hash_defined \
68 || (EH)->elf.root.type == bfd_link_hash_defweak) \
69 && elf_has_no_copy_on_protected ((EH)->elf.root.u.def.section->owner) \
70 && ((EH)->elf.root.u.def.section->owner->flags & DYNAMIC) != 0 \
71 && ((EH)->elf.root.u.def.section->flags & SEC_CODE) == 0)
73 /* TRUE if dynamic relocation is needed. If we are creating a shared
74 library, and this is a reloc against a global symbol, or a non PC
75 relative reloc against a local symbol, then we need to copy the reloc
76 into the shared library. However, if we are linking with -Bsymbolic,
77 we do not need to copy a reloc against a global symbol which is
78 defined in an object we are including in the link (i.e., DEF_REGULAR
79 is set). At this point we have not seen all the input files, so it
80 is possible that DEF_REGULAR is not set now but will be set later (it
81 is never cleared). In case of a weak definition, DEF_REGULAR may be
82 cleared later by a strong definition in a shared library. We account
83 for that possibility below by storing information in the relocs_copied
84 field of the hash table entry. A similar situation occurs when
85 creating shared libraries and symbol visibility changes render the
88 If on the other hand, we are creating an executable, we may need to
89 keep relocations for symbols satisfied by a dynamic library if we
90 manage to avoid copy relocs for the symbol.
92 We also need to generate dynamic pointer relocation against
93 STT_GNU_IFUNC symbol in the non-code section. */
94 #define NEED_DYNAMIC_RELOCATION_P(INFO, H, SEC, R_TYPE, POINTER_TYPE) \
95 ((bfd_link_pic (INFO) \
96 && (! X86_PCREL_TYPE_P (R_TYPE) \
98 && (! (bfd_link_pie (INFO) \
99 || SYMBOLIC_BIND ((INFO), (H))) \
100 || (H)->root.type == bfd_link_hash_defweak \
101 || !(H)->def_regular)))) \
103 && (H)->type == STT_GNU_IFUNC \
104 && (R_TYPE) == POINTER_TYPE \
105 && ((SEC)->flags & SEC_CODE) == 0) \
106 || (ELIMINATE_COPY_RELOCS \
107 && !bfd_link_pic (INFO) \
109 && ((H)->root.type == bfd_link_hash_defweak \
110 || !(H)->def_regular)))
112 /* TRUE if dynamic relocation should be generated. Don't copy a
113 pc-relative relocation into the output file if the symbol needs
114 copy reloc or the symbol is undefined when building executable.
115 Copy dynamic function pointer relocations. Don't generate dynamic
116 relocations against resolved undefined weak symbols in PIE, except
117 when PC32_RELOC is TRUE. Undefined weak symbol is bound locally
118 when PIC is false. */
119 #define GENERATE_DYNAMIC_RELOCATION_P(INFO, EH, R_TYPE, \
120 NEED_COPY_RELOC_IN_PIE, \
121 RESOLVED_TO_ZERO, PC32_RELOC) \
122 ((bfd_link_pic (INFO) \
123 && !(NEED_COPY_RELOC_IN_PIE) \
125 || ((ELF_ST_VISIBILITY ((EH)->elf.other) == STV_DEFAULT \
126 && (!(RESOLVED_TO_ZERO) || PC32_RELOC)) \
127 || (EH)->elf.root.type != bfd_link_hash_undefweak)) \
128 && ((!X86_PCREL_TYPE_P (R_TYPE) \
129 && !X86_SIZE_TYPE_P (R_TYPE)) \
130 || ! SYMBOL_CALLS_LOCAL ((INFO), &(EH)->elf))) \
131 || (ELIMINATE_COPY_RELOCS \
132 && !bfd_link_pic (INFO) \
134 && (EH)->elf.dynindx != -1 \
135 && (!(EH)->elf.non_got_ref \
136 || (EH)->func_pointer_refcount > 0 \
137 || ((EH)->elf.root.type == bfd_link_hash_undefweak \
138 && !(RESOLVED_TO_ZERO))) \
139 && (((EH)->elf.def_dynamic && !(EH)->elf.def_regular) \
140 || (EH)->elf.root.type == bfd_link_hash_undefined)))
142 /* TRUE if this input relocation should be copied to output. H->dynindx
143 may be -1 if this symbol was marked to become local. */
144 #define COPY_INPUT_RELOC_P(INFO, H, R_TYPE) \
146 && (H)->dynindx != -1 \
147 && (X86_PCREL_TYPE_P (R_TYPE) \
148 || !(bfd_link_executable (INFO) || SYMBOLIC_BIND ((INFO), (H))) \
149 || !(H)->def_regular))
151 /* TRUE if this is actually a static link, or it is a -Bsymbolic link
152 and the symbol is defined locally, or the symbol was forced to be
153 local because of a version file. */
154 #define RESOLVED_LOCALLY_P(INFO, H, HTAB) \
155 (!WILL_CALL_FINISH_DYNAMIC_SYMBOL ((HTAB)->elf.dynamic_sections_created, \
156 bfd_link_pic (INFO), (H)) \
157 || (bfd_link_pic (INFO) \
158 && SYMBOL_REFERENCES_LOCAL_P ((INFO), (H))) \
159 || (ELF_ST_VISIBILITY ((H)->other) \
160 && (H)->root.type == bfd_link_hash_undefweak))
162 /* TRUE if relative relocation should be generated. GOT reference to
163 global symbol in PIC will lead to dynamic symbol. It becomes a
164 problem when "time" or "times" is defined as a variable in an
165 executable, clashing with functions of the same name in libc. If a
166 symbol isn't undefined weak symbol, don't make it dynamic in PIC and
167 generate relative relocation. */
168 #define GENERATE_RELATIVE_RELOC_P(INFO, H) \
169 ((H)->dynindx == -1 \
170 && !(H)->forced_local \
171 && (H)->root.type != bfd_link_hash_undefweak \
172 && bfd_link_pic (INFO))
174 /* TRUE if this is a pointer reference to a local IFUNC. */
175 #define POINTER_LOCAL_IFUNC_P(INFO, H) \
176 ((H)->dynindx == -1 \
177 || (H)->forced_local \
178 || bfd_link_executable (INFO))
180 /* TRUE if this is a PLT reference to a local IFUNC. */
181 #define PLT_LOCAL_IFUNC_P(INFO, H) \
182 ((H)->dynindx == -1 \
183 || ((bfd_link_executable (INFO) \
184 || ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT) \
185 && (H)->def_regular \
186 && (H)->type == STT_GNU_IFUNC))
188 /* TRUE if TLS IE->LE transition is OK. */
189 #define TLS_TRANSITION_IE_TO_LE_P(INFO, H, TLS_TYPE) \
190 (bfd_link_executable (INFO) \
192 && (H)->dynindx == -1 \
193 && (TLS_TYPE & GOT_TLS_IE))
195 /* Verify that the symbol has an entry in the procedure linkage table. */
196 #define VERIFY_PLT_ENTRY(INFO, H, PLT, GOTPLT, RELPLT, LOCAL_UNDEFWEAK) \
199 if (((H)->dynindx == -1 \
200 && !LOCAL_UNDEFWEAK \
201 && !(((H)->forced_local || bfd_link_executable (INFO)) \
202 && (H)->def_regular \
203 && (H)->type == STT_GNU_IFUNC)) \
205 || (GOTPLT) == NULL \
206 || (RELPLT) == NULL) \
211 /* Verify that the symbol supports copy relocation. */
212 #define VERIFY_COPY_RELOC(H, HTAB) \
215 if ((H)->dynindx == -1 \
216 || ((H)->root.type != bfd_link_hash_defined \
217 && (H)->root.type != bfd_link_hash_defweak) \
218 || (HTAB)->elf.srelbss == NULL \
219 || (HTAB)->elf.sreldynrelro == NULL) \
224 /* x86 ELF linker hash entry. */
226 struct elf_x86_link_hash_entry
228 struct elf_link_hash_entry elf;
230 /* Track dynamic relocs copied for this symbol. */
231 struct elf_dyn_relocs *dyn_relocs;
233 unsigned char tls_type;
235 /* Bit 0: Symbol has no GOT nor PLT relocations.
236 Bit 1: Symbol has non-GOT/non-PLT relocations in text sections.
237 zero_undefweak is initialized to 1 and undefined weak symbol
238 should be resolved to 0 if zero_undefweak > 0. */
239 unsigned int zero_undefweak : 2;
241 /* Don't call finish_dynamic_symbol on this symbol. */
242 unsigned int no_finish_dynamic_symbol : 1;
244 /* TRUE if symbol is __tls_get_addr. */
245 unsigned int tls_get_addr : 1;
247 /* TRUE if symbol is defined as a protected symbol. */
248 unsigned int def_protected : 1;
250 /* 0: Symbol references are unknown.
251 1: Symbol references aren't local.
252 2: Symbol references are local.
254 unsigned int local_ref : 2;
256 /* TRUE if symbol is defined by linker. */
257 unsigned int linker_def : 1;
259 /* TRUE if symbol is referenced by R_386_GOTOFF relocation. This is
260 only used by i386. */
261 unsigned int gotoff_ref : 1;
263 /* TRUE if a weak symbol with a real definition needs a copy reloc.
264 When there is a weak symbol with a real definition, the processor
265 independent code will have arranged for us to see the real
266 definition first. We need to copy the needs_copy bit from the
267 real definition and check it when allowing copy reloc in PIE. This
268 is only used by x86-64. */
269 unsigned int needs_copy : 1;
271 /* Reference count of C/C++ function pointer relocations in read-write
272 section which can be resolved at run-time. */
273 bfd_signed_vma func_pointer_refcount;
275 /* Information about the GOT PLT entry. Filled when there are both
276 GOT and PLT relocations against the same function. */
277 union gotplt_union plt_got;
279 /* Information about the second PLT entry. */
280 union gotplt_union plt_second;
282 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
283 starting at the end of the jump table. */
287 struct elf_x86_lazy_plt_layout
289 /* The first entry in an absolute lazy procedure linkage table looks
291 const bfd_byte *plt0_entry;
292 unsigned int plt0_entry_size; /* Size of PLT0 entry. */
294 /* Later entries in an absolute lazy procedure linkage table look
296 const bfd_byte *plt_entry;
297 unsigned int plt_entry_size; /* Size of each PLT entry. */
299 /* Offsets into plt0_entry that are to be replaced with GOT[1] and
301 unsigned int plt0_got1_offset;
302 unsigned int plt0_got2_offset;
304 /* Offset of the end of the PC-relative instruction containing
305 plt0_got2_offset. This is for x86-64 only. */
306 unsigned int plt0_got2_insn_end;
308 /* Offsets into plt_entry that are to be replaced with... */
309 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
310 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
311 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
313 /* Length of the PC-relative instruction containing plt_got_offset.
314 This is used for x86-64 only. */
315 unsigned int plt_got_insn_size;
317 /* Offset of the end of the PC-relative jump to plt0_entry. This is
318 used for x86-64 only. */
319 unsigned int plt_plt_insn_end;
321 /* Offset into plt_entry where the initial value of the GOT entry
323 unsigned int plt_lazy_offset;
325 /* The first entry in a PIC lazy procedure linkage table looks like
327 const bfd_byte *pic_plt0_entry;
329 /* Subsequent entries in a PIC lazy procedure linkage table look
331 const bfd_byte *pic_plt_entry;
333 /* .eh_frame covering the lazy .plt section. */
334 const bfd_byte *eh_frame_plt;
335 unsigned int eh_frame_plt_size;
338 struct elf_x86_non_lazy_plt_layout
340 /* Entries in an absolute non-lazy procedure linkage table look like
342 const bfd_byte *plt_entry;
343 /* Entries in a PIC non-lazy procedure linkage table look like this. */
344 const bfd_byte *pic_plt_entry;
346 unsigned int plt_entry_size; /* Size of each PLT entry. */
348 /* Offsets into plt_entry that are to be replaced with... */
349 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
351 /* Length of the PC-relative instruction containing plt_got_offset.
352 This is used for x86-64 only. */
353 unsigned int plt_got_insn_size;
355 /* .eh_frame covering the non-lazy .plt section. */
356 const bfd_byte *eh_frame_plt;
357 unsigned int eh_frame_plt_size;
360 struct elf_x86_plt_layout
362 /* The first entry in a lazy procedure linkage table looks like this.
363 This is only used for i386 where absolute PLT0 and PIC PLT0 are
365 const bfd_byte *plt0_entry;
366 /* Entries in a procedure linkage table look like this. */
367 const bfd_byte *plt_entry;
368 unsigned int plt_entry_size; /* Size of each PLT entry. */
371 unsigned int has_plt0;
373 /* Offsets into plt_entry that are to be replaced with... */
374 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
376 /* Length of the PC-relative instruction containing plt_got_offset.
377 This is only used for x86-64. */
378 unsigned int plt_got_insn_size;
380 /* .eh_frame covering the .plt section. */
381 const bfd_byte *eh_frame_plt;
382 unsigned int eh_frame_plt_size;
385 /* Values in tls_type of x86 ELF linker hash entry. */
386 #define GOT_UNKNOWN 0
390 #define GOT_TLS_IE_POS 5
391 #define GOT_TLS_IE_NEG 6
392 #define GOT_TLS_IE_BOTH 7
393 #define GOT_TLS_GDESC 8
394 #define GOT_TLS_GD_BOTH_P(type) \
395 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
396 #define GOT_TLS_GD_P(type) \
397 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
398 #define GOT_TLS_GDESC_P(type) \
399 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
400 #define GOT_TLS_GD_ANY_P(type) \
401 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
403 #define elf_x86_hash_entry(ent) \
404 ((struct elf_x86_link_hash_entry *)(ent))
406 enum elf_x86_target_os
413 /* x86 ELF linker hash table. */
415 struct elf_x86_link_hash_table
417 struct elf_link_hash_table elf;
419 /* Short-cuts to get to dynamic linker sections. */
421 asection *plt_eh_frame;
422 asection *plt_second;
423 asection *plt_second_eh_frame;
425 asection *plt_got_eh_frame;
427 /* Parameters describing PLT generation, lazy or non-lazy. */
428 struct elf_x86_plt_layout plt;
430 /* Parameters describing lazy PLT generation. */
431 const struct elf_x86_lazy_plt_layout *lazy_plt;
433 /* Parameters describing non-lazy PLT generation. */
434 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
438 bfd_signed_vma refcount;
442 /* The amount of space used by the jump slots in the GOT. */
443 bfd_vma sgotplt_jump_table_size;
445 /* Small local sym cache. */
446 struct sym_cache sym_cache;
448 /* _TLS_MODULE_BASE_ symbol. */
449 struct bfd_link_hash_entry *tls_module_base;
451 /* Used by local STT_GNU_IFUNC symbols. */
452 htab_t loc_hash_table;
453 void * loc_hash_memory;
455 /* The offset into sgot of the GOT entry used by the PLT entry
459 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
460 bfd_vma next_jump_slot_index;
461 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
462 bfd_vma next_irelative_index;
464 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
465 to read-only sections. */
466 bfd_boolean readonly_dynrelocs_against_ifunc;
468 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks.
469 This is used for i386 only. */
472 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. This
473 is only used for i386. */
474 bfd_vma next_tls_desc_index;
476 /* The offset into splt of the PLT entry for the TLS descriptor
477 resolver. Special values are 0, if not necessary (or not found
478 to be necessary yet), and -1 if needed but not determined
479 yet. This is only used for x86-64. */
482 /* Value used to fill the unused bytes of the first PLT entry. This
483 is only used for i386. */
484 bfd_byte plt0_pad_byte;
486 bfd_vma (*r_info) (bfd_vma, bfd_vma);
487 bfd_vma (*r_sym) (bfd_vma);
488 bfd_boolean (*is_reloc_section) (const char *);
489 enum elf_target_id target_id;
490 enum elf_x86_target_os target_os;
491 unsigned int sizeof_reloc;
492 unsigned int dt_reloc;
493 unsigned int dt_reloc_sz;
494 unsigned int dt_reloc_ent;
495 unsigned int got_entry_size;
496 unsigned int pointer_r_type;
497 int dynamic_interpreter_size;
498 const char *dynamic_interpreter;
499 const char *tls_get_addr;
502 /* Architecture-specific backend data for x86. */
504 struct elf_x86_backend_data
507 enum elf_x86_target_os target_os;
510 #define get_elf_x86_backend_data(abfd) \
511 ((const struct elf_x86_backend_data *) \
512 get_elf_backend_data (abfd)->arch_data)
514 struct elf_x86_init_table
516 /* The lazy PLT layout. */
517 const struct elf_x86_lazy_plt_layout *lazy_plt;
519 /* The non-lazy PLT layout. */
520 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
522 /* The lazy PLT layout for IBT. */
523 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
525 /* The non-lazy PLT layout for IBT. */
526 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
528 bfd_byte plt0_pad_byte;
530 bfd_vma (*r_info) (bfd_vma, bfd_vma);
531 bfd_vma (*r_sym) (bfd_vma);
534 struct elf_x86_obj_tdata
536 struct elf_obj_tdata root;
538 /* tls_type for each local got entry. */
539 char *local_got_tls_type;
541 /* GOTPLT entries for TLS descriptors. */
542 bfd_vma *local_tlsdesc_gotent;
545 enum elf_x86_plt_type
559 enum elf_x86_plt_type type;
560 unsigned int plt_got_offset;
561 unsigned int plt_entry_size;
562 unsigned int plt_got_insn_size; /* Only used for x86-64. */
566 #define elf_x86_tdata(abfd) \
567 ((struct elf_x86_obj_tdata *) (abfd)->tdata.any)
569 #define elf_x86_local_got_tls_type(abfd) \
570 (elf_x86_tdata (abfd)->local_got_tls_type)
572 #define elf_x86_local_tlsdesc_gotent(abfd) \
573 (elf_x86_tdata (abfd)->local_tlsdesc_gotent)
575 #define elf_x86_compute_jump_table_size(htab) \
576 ((htab)->elf.srelplt->reloc_count * (htab)->got_entry_size)
578 #define is_x86_elf(bfd, htab) \
579 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
580 && elf_tdata (bfd) != NULL \
581 && elf_object_id (bfd) == (htab)->target_id)
583 extern bfd_boolean _bfd_x86_elf_mkobject
586 extern void _bfd_x86_elf_set_tls_module_base
587 (struct bfd_link_info *);
589 extern bfd_vma _bfd_x86_elf_dtpoff_base
590 (struct bfd_link_info *);
592 extern bfd_boolean _bfd_x86_elf_readonly_dynrelocs
593 (struct elf_link_hash_entry *, void *);
595 extern struct elf_link_hash_entry * _bfd_elf_x86_get_local_sym_hash
596 (struct elf_x86_link_hash_table *, bfd *, const Elf_Internal_Rela *,
599 extern hashval_t _bfd_x86_elf_local_htab_hash
602 extern int _bfd_x86_elf_local_htab_eq
603 (const void *, const void *);
605 extern struct bfd_hash_entry * _bfd_x86_elf_link_hash_newfunc
606 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
608 extern struct bfd_link_hash_table * _bfd_x86_elf_link_hash_table_create
611 extern int _bfd_x86_elf_compare_relocs
612 (const void *, const void *);
614 extern bfd_boolean _bfd_x86_elf_link_check_relocs
615 (bfd *, struct bfd_link_info *);
617 extern bfd_boolean _bfd_x86_elf_size_dynamic_sections
618 (bfd *, struct bfd_link_info *);
620 extern struct elf_x86_link_hash_table *_bfd_x86_elf_finish_dynamic_sections
621 (bfd *, struct bfd_link_info *);
623 extern bfd_boolean _bfd_x86_elf_always_size_sections
624 (bfd *, struct bfd_link_info *);
626 extern void _bfd_x86_elf_merge_symbol_attribute
627 (struct elf_link_hash_entry *, const Elf_Internal_Sym *,
628 bfd_boolean, bfd_boolean);
630 extern void _bfd_x86_elf_copy_indirect_symbol
631 (struct bfd_link_info *, struct elf_link_hash_entry *,
632 struct elf_link_hash_entry *);
634 extern bfd_boolean _bfd_x86_elf_fixup_symbol
635 (struct bfd_link_info *, struct elf_link_hash_entry *);
637 extern bfd_boolean _bfd_x86_elf_hash_symbol
638 (struct elf_link_hash_entry *);
640 extern bfd_boolean _bfd_x86_elf_adjust_dynamic_symbol
641 (struct bfd_link_info *, struct elf_link_hash_entry *);
643 extern void _bfd_x86_elf_hide_symbol
644 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
646 extern bfd_boolean _bfd_x86_elf_link_symbol_references_local
647 (struct bfd_link_info *, struct elf_link_hash_entry *);
649 extern asection * _bfd_x86_elf_gc_mark_hook
650 (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
651 struct elf_link_hash_entry *, Elf_Internal_Sym *);
653 extern long _bfd_x86_elf_get_synthetic_symtab
654 (bfd *, long, long, bfd_vma, struct elf_x86_plt [], asymbol **,
657 extern enum elf_property_kind _bfd_x86_elf_parse_gnu_properties
658 (bfd *, unsigned int, bfd_byte *, unsigned int);
660 extern bfd_boolean _bfd_x86_elf_merge_gnu_properties
661 (struct bfd_link_info *, bfd *, elf_property *, elf_property *);
663 extern bfd * _bfd_x86_elf_link_setup_gnu_properties
664 (struct bfd_link_info *, struct elf_x86_init_table *);
666 #define bfd_elf64_mkobject \
667 _bfd_x86_elf_mkobject
668 #define bfd_elf32_mkobject \
669 _bfd_x86_elf_mkobject
670 #define bfd_elf64_bfd_link_hash_table_create \
671 _bfd_x86_elf_link_hash_table_create
672 #define bfd_elf32_bfd_link_hash_table_create \
673 _bfd_x86_elf_link_hash_table_create
674 #define bfd_elf64_bfd_link_check_relocs \
675 _bfd_x86_elf_link_check_relocs
676 #define bfd_elf32_bfd_link_check_relocs \
677 _bfd_x86_elf_link_check_relocs
679 #define elf_backend_size_dynamic_sections \
680 _bfd_x86_elf_size_dynamic_sections
681 #define elf_backend_always_size_sections \
682 _bfd_x86_elf_always_size_sections
683 #define elf_backend_merge_symbol_attribute \
684 _bfd_x86_elf_merge_symbol_attribute
685 #define elf_backend_copy_indirect_symbol \
686 _bfd_x86_elf_copy_indirect_symbol
687 #define elf_backend_fixup_symbol \
688 _bfd_x86_elf_fixup_symbol
689 #define elf_backend_hash_symbol \
690 _bfd_x86_elf_hash_symbol
691 #define elf_backend_adjust_dynamic_symbol \
692 _bfd_x86_elf_adjust_dynamic_symbol
693 #define elf_backend_gc_mark_hook \
694 _bfd_x86_elf_gc_mark_hook
695 #define elf_backend_omit_section_dynsym \
696 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
697 #define elf_backend_parse_gnu_properties \
698 _bfd_x86_elf_parse_gnu_properties
699 #define elf_backend_merge_gnu_properties \
700 _bfd_x86_elf_merge_gnu_properties