1 /* x86 specific support for ELF
2 Copyright (C) 2017-2021 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. */
21 /* Don't generate unused section symbols. */
22 #define TARGET_KEEP_UNUSED_SECTION_SYMBOLS false
30 #include "elf-linker-x86.h"
32 #define PLT_CIE_LENGTH 20
33 #define PLT_FDE_LENGTH 36
34 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
35 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
37 #define ABI_64_P(abfd) \
38 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
40 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
41 copying dynamic variables from a shared lib into an app's dynbss
42 section, and instead use a dynamic relocation to point into the
44 #define ELIMINATE_COPY_RELOCS 1
46 #define elf_x86_hash_table(p, id) \
47 (is_elf_hash_table ((p)->hash) \
48 && elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) == (id) \
49 ? ((struct elf_x86_link_hash_table *) ((p)->hash)) : NULL)
51 /* Will references to this symbol always be local in this object? */
52 #define SYMBOL_REFERENCES_LOCAL_P(INFO, H) \
53 _bfd_x86_elf_link_symbol_references_local ((INFO), (H))
55 /* TRUE if an undefined weak symbol should be resolved to 0. Local
56 undefined weak symbol is always resolved to 0. Reference to an
57 undefined weak symbol is resolved to 0 in executable if undefined
58 weak symbol should be resolved to 0 (zero_undefweak > 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)->zero_undefweak > 0)))
65 /* Should copy relocation be generated for a symbol. Don't generate
66 copy relocation against a protected symbol defined in a shared
67 object with GNU_PROPERTY_NO_COPY_ON_PROTECTED. */
68 #define SYMBOL_NO_COPYRELOC(INFO, EH) \
69 ((EH)->def_protected \
70 && ((EH)->elf.root.type == bfd_link_hash_defined \
71 || (EH)->elf.root.type == bfd_link_hash_defweak) \
72 && elf_has_no_copy_on_protected ((EH)->elf.root.u.def.section->owner) \
73 && ((EH)->elf.root.u.def.section->owner->flags & DYNAMIC) != 0 \
74 && ((EH)->elf.root.u.def.section->flags & SEC_CODE) == 0)
76 /* TRUE if dynamic relocation is needed. If we are creating a shared
77 library, and this is a reloc against a global symbol, or a non PC
78 relative reloc against a local symbol, then we need to copy the reloc
79 into the shared library. However, if we are linking with -Bsymbolic,
80 we do not need to copy a reloc against a global symbol which is
81 defined in an object we are including in the link (i.e., DEF_REGULAR
84 If PCREL_PLT is true, don't generate dynamic relocation in PIE for
85 PC-relative relocation against a dynamic function definition in data
86 section when PLT address can be used.
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, PCREL_PLT, H, SEC, R_TYPE, \
96 ((bfd_link_pic (INFO) \
97 && (! X86_PCREL_TYPE_P (R_TYPE) \
99 && (! (bfd_link_pie (INFO) \
100 || SYMBOLIC_BIND ((INFO), (H))) \
101 || (H)->root.type == bfd_link_hash_defweak \
102 || (!(bfd_link_pie (INFO) \
104 && (H)->plt.refcount > 0 \
105 && ((SEC)->flags & SEC_CODE) == 0 \
106 && (H)->type == STT_FUNC \
107 && (H)->def_dynamic) \
108 && !(H)->def_regular))))) \
110 && (H)->type == STT_GNU_IFUNC \
111 && (R_TYPE) == POINTER_TYPE \
112 && ((SEC)->flags & SEC_CODE) == 0) \
113 || (ELIMINATE_COPY_RELOCS \
114 && !bfd_link_pic (INFO) \
116 && ((H)->root.type == bfd_link_hash_defweak \
117 || !(H)->def_regular)))
119 /* TRUE if dynamic relocation should be generated. Don't copy a
120 pc-relative relocation into the output file if the symbol needs
121 copy reloc or the symbol is undefined when building executable.
122 Copy dynamic function pointer relocations. Don't generate dynamic
123 relocations against resolved undefined weak symbols in PIE, except
124 when PC32_RELOC is TRUE. Undefined weak symbol is bound locally
125 when PIC is false. Don't generate dynamic relocations against
126 non-preemptible absolute symbol. */
127 #define GENERATE_DYNAMIC_RELOCATION_P(INFO, EH, R_TYPE, SEC, \
128 NEED_COPY_RELOC_IN_PIE, \
129 RESOLVED_TO_ZERO, PC32_RELOC) \
130 ((bfd_link_pic (INFO) \
131 && !(bfd_is_abs_section (SEC) \
133 || SYMBOL_REFERENCES_LOCAL (INFO, &(EH)->elf))) \
134 && !(NEED_COPY_RELOC_IN_PIE) \
136 || ((ELF_ST_VISIBILITY ((EH)->elf.other) == STV_DEFAULT \
137 && (!(RESOLVED_TO_ZERO) || PC32_RELOC)) \
138 || (EH)->elf.root.type != bfd_link_hash_undefweak)) \
139 && ((!X86_PCREL_TYPE_P (R_TYPE) && !X86_SIZE_TYPE_P (R_TYPE)) \
140 || ! SYMBOL_CALLS_LOCAL ((INFO), \
141 (struct elf_link_hash_entry *) (EH)))) \
142 || (ELIMINATE_COPY_RELOCS \
143 && !bfd_link_pic (INFO) \
145 && (EH)->elf.dynindx != -1 \
146 && (!(EH)->elf.non_got_ref \
147 || ((EH)->elf.root.type == bfd_link_hash_undefweak \
148 && !(RESOLVED_TO_ZERO))) \
149 && (((EH)->elf.def_dynamic && !(EH)->elf.def_regular) \
150 || (EH)->elf.root.type == bfd_link_hash_undefined)))
152 /* TRUE if this input relocation should be copied to output. H->dynindx
153 may be -1 if this symbol was marked to become local. */
154 #define COPY_INPUT_RELOC_P(INFO, H, R_TYPE) \
156 && (H)->dynindx != -1 \
157 && (X86_PCREL_TYPE_P (R_TYPE) \
158 || !(bfd_link_executable (INFO) || SYMBOLIC_BIND ((INFO), (H))) \
159 || !(H)->def_regular))
161 /* TRUE if this is actually a static link, or it is a -Bsymbolic link
162 and the symbol is defined locally, or the symbol was forced to be
163 local because of a version file. */
164 #define RESOLVED_LOCALLY_P(INFO, H, HTAB) \
165 (!WILL_CALL_FINISH_DYNAMIC_SYMBOL ((HTAB)->elf.dynamic_sections_created, \
166 bfd_link_pic (INFO), (H)) \
167 || (bfd_link_pic (INFO) \
168 && SYMBOL_REFERENCES_LOCAL_P ((INFO), (H))) \
169 || (ELF_ST_VISIBILITY ((H)->other) \
170 && (H)->root.type == bfd_link_hash_undefweak))
172 /* TRUE if this symbol isn't defined by a shared object. */
173 #define SYMBOL_DEFINED_NON_SHARED_P(H) \
175 || (H)->root.linker_def \
176 || (H)->root.ldscript_def \
177 || ((struct elf_x86_link_hash_entry *) (H))->linker_def \
178 || ELF_COMMON_DEF_P (H))
180 /* Return TRUE if the symbol described by a linker hash entry H is
181 going to be absolute. Similar to bfd_is_abs_symbol, but excluding
182 all linker-script defined symbols. */
183 #define ABS_SYMBOL_P(H) \
184 (bfd_is_abs_symbol (&(H)->root) && !(H)->root.ldscript_def)
186 /* TRUE if relative relocation should be generated. GOT reference to
187 global symbol in PIC will lead to dynamic symbol. It becomes a
188 problem when "time" or "times" is defined as a variable in an
189 executable, clashing with functions of the same name in libc. If a
190 symbol isn't undefined weak symbol, don't make it dynamic in PIC and
191 generate relative relocation. Don't generate relative relocation
192 against non-preemptible absolute symbol. */
193 #define GENERATE_RELATIVE_RELOC_P(INFO, H) \
194 ((H)->dynindx == -1 \
195 && !(H)->forced_local \
196 && (H)->root.type != bfd_link_hash_undefweak \
197 && bfd_link_pic (INFO) \
198 && !ABS_SYMBOL_P (H))
200 /* TRUE if this is a pointer reference to a local IFUNC. */
201 #define POINTER_LOCAL_IFUNC_P(INFO, H) \
202 ((H)->dynindx == -1 \
203 || (H)->forced_local \
204 || bfd_link_executable (INFO))
206 /* TRUE if this is a PLT reference to a local IFUNC. */
207 #define PLT_LOCAL_IFUNC_P(INFO, H) \
208 ((H)->dynindx == -1 \
209 || ((bfd_link_executable (INFO) \
210 || ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT) \
211 && (H)->def_regular \
212 && (H)->type == STT_GNU_IFUNC))
214 /* TRUE if TLS IE->LE transition is OK. */
215 #define TLS_TRANSITION_IE_TO_LE_P(INFO, H, TLS_TYPE) \
216 (bfd_link_executable (INFO) \
218 && (H)->dynindx == -1 \
219 && (TLS_TYPE & GOT_TLS_IE))
221 /* Verify that the symbol has an entry in the procedure linkage table. */
222 #define VERIFY_PLT_ENTRY(INFO, H, PLT, GOTPLT, RELPLT, LOCAL_UNDEFWEAK) \
225 if (((H)->dynindx == -1 \
226 && !LOCAL_UNDEFWEAK \
227 && !(((H)->forced_local || bfd_link_executable (INFO)) \
228 && (H)->def_regular \
229 && (H)->type == STT_GNU_IFUNC)) \
231 || (GOTPLT) == NULL \
232 || (RELPLT) == NULL) \
237 /* Verify that the symbol supports copy relocation. */
238 #define VERIFY_COPY_RELOC(H, HTAB) \
241 if ((H)->dynindx == -1 \
242 || ((H)->root.type != bfd_link_hash_defined \
243 && (H)->root.type != bfd_link_hash_defweak) \
244 || (HTAB)->elf.srelbss == NULL \
245 || (HTAB)->elf.sreldynrelro == NULL) \
250 /* x86 ELF linker hash entry. */
252 struct elf_x86_link_hash_entry
254 struct elf_link_hash_entry elf
;
256 unsigned char tls_type
;
258 /* Bit 0: Symbol has no GOT nor PLT relocations.
259 Bit 1: Symbol has non-GOT/non-PLT relocations in text sections.
260 zero_undefweak is initialized to 1 and undefined weak symbol
261 should be resolved to 0 if zero_undefweak > 0. */
262 unsigned int zero_undefweak
: 2;
264 /* Don't call finish_dynamic_symbol on this symbol. */
265 unsigned int no_finish_dynamic_symbol
: 1;
267 /* TRUE if symbol is __tls_get_addr. */
268 unsigned int tls_get_addr
: 1;
270 /* TRUE if symbol is defined as a protected symbol. */
271 unsigned int def_protected
: 1;
273 /* 0: Symbol references are unknown.
274 1: Symbol references aren't local.
275 2: Symbol references are local.
277 unsigned int local_ref
: 2;
279 /* TRUE if symbol is defined by linker. */
280 unsigned int linker_def
: 1;
282 /* TRUE if symbol is referenced by R_386_GOTOFF relocation. This is
283 only used by i386. */
284 unsigned int gotoff_ref
: 1;
286 /* TRUE if a weak symbol with a real definition needs a copy reloc.
287 When there is a weak symbol with a real definition, the processor
288 independent code will have arranged for us to see the real
289 definition first. We need to copy the needs_copy bit from the
290 real definition and check it when allowing copy reloc in PIE. This
291 is only used by x86-64. */
292 unsigned int needs_copy
: 1;
294 /* Information about the GOT PLT entry. Filled when there are both
295 GOT and PLT relocations against the same function. */
296 union gotplt_union plt_got
;
298 /* Information about the second PLT entry. */
299 union gotplt_union plt_second
;
301 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
302 starting at the end of the jump table. */
306 struct elf_x86_lazy_plt_layout
308 /* The first entry in a lazy procedure linkage table looks like this. */
309 const bfd_byte
*plt0_entry
;
310 unsigned int plt0_entry_size
; /* Size of PLT0 entry. */
312 /* Later entries in a lazy procedure linkage table look like this. */
313 const bfd_byte
*plt_entry
;
314 unsigned int plt_entry_size
; /* Size of each PLT entry. */
316 /* The TLSDESC entry in a lazy procedure linkage table looks like
317 this. This is for x86-64 only. */
318 const bfd_byte
*plt_tlsdesc_entry
;
319 unsigned int plt_tlsdesc_entry_size
; /* Size of TLSDESC entry. */
321 /* Offsets into the TLSDESC entry that are to be replaced with
322 GOT+8 and GOT+TDG. These are for x86-64 only. */
323 unsigned int plt_tlsdesc_got1_offset
;
324 unsigned int plt_tlsdesc_got2_offset
;
326 /* Offset of the end of the PC-relative instructions containing
327 plt_tlsdesc_got1_offset and plt_tlsdesc_got2_offset. These
328 are for x86-64 only. */
329 unsigned int plt_tlsdesc_got1_insn_end
;
330 unsigned int plt_tlsdesc_got2_insn_end
;
332 /* Offsets into plt0_entry that are to be replaced with GOT[1] and
334 unsigned int plt0_got1_offset
;
335 unsigned int plt0_got2_offset
;
337 /* Offset of the end of the PC-relative instruction containing
338 plt0_got2_offset. This is for x86-64 only. */
339 unsigned int plt0_got2_insn_end
;
341 /* Offsets into plt_entry that are to be replaced with... */
342 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
343 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
344 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
346 /* Length of the PC-relative instruction containing plt_got_offset.
347 This is used for x86-64 only. */
348 unsigned int plt_got_insn_size
;
350 /* Offset of the end of the PC-relative jump to plt0_entry. This is
351 used for x86-64 only. */
352 unsigned int plt_plt_insn_end
;
354 /* Offset into plt_entry where the initial value of the GOT entry
356 unsigned int plt_lazy_offset
;
358 /* The first entry in a PIC lazy procedure linkage table looks like
360 const bfd_byte
*pic_plt0_entry
;
362 /* Subsequent entries in a PIC lazy procedure linkage table look
364 const bfd_byte
*pic_plt_entry
;
366 /* .eh_frame covering the lazy .plt section. */
367 const bfd_byte
*eh_frame_plt
;
368 unsigned int eh_frame_plt_size
;
371 struct elf_x86_non_lazy_plt_layout
373 /* Entries in a non-lazy procedure linkage table look like this. */
374 const bfd_byte
*plt_entry
;
375 /* Entries in a PIC non-lazy procedure linkage table look like this.
376 This is only used for i386 where absolute PLT and PIC PLT are
378 const bfd_byte
*pic_plt_entry
;
380 unsigned int plt_entry_size
; /* Size of each PLT entry. */
382 /* Offsets into plt_entry that are to be replaced with... */
383 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
385 /* Length of the PC-relative instruction containing plt_got_offset.
386 This is used for x86-64 only. */
387 unsigned int plt_got_insn_size
;
389 /* .eh_frame covering the non-lazy .plt section. */
390 const bfd_byte
*eh_frame_plt
;
391 unsigned int eh_frame_plt_size
;
394 struct elf_x86_plt_layout
396 /* The first entry in a lazy procedure linkage table looks like this. */
397 const bfd_byte
*plt0_entry
;
398 /* Entries in a procedure linkage table look like this. */
399 const bfd_byte
*plt_entry
;
400 unsigned int plt_entry_size
; /* Size of each PLT entry. */
403 unsigned int has_plt0
;
405 /* Offsets into plt_entry that are to be replaced with... */
406 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
408 /* Length of the PC-relative instruction containing plt_got_offset.
409 This is only used for x86-64. */
410 unsigned int plt_got_insn_size
;
412 /* Alignment of the .iplt section. */
413 unsigned int iplt_alignment
;
415 /* .eh_frame covering the .plt section. */
416 const bfd_byte
*eh_frame_plt
;
417 unsigned int eh_frame_plt_size
;
420 /* Values in tls_type of x86 ELF linker hash entry. */
421 #define GOT_UNKNOWN 0
425 #define GOT_TLS_IE_POS 5
426 #define GOT_TLS_IE_NEG 6
427 #define GOT_TLS_IE_BOTH 7
428 #define GOT_TLS_GDESC 8
430 #define GOT_TLS_GD_BOTH_P(type) \
431 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
432 #define GOT_TLS_GD_P(type) \
433 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
434 #define GOT_TLS_GDESC_P(type) \
435 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
436 #define GOT_TLS_GD_ANY_P(type) \
437 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
439 #define elf_x86_hash_entry(ent) \
440 ((struct elf_x86_link_hash_entry *)(ent))
442 /* x86 ELF linker hash table. */
444 struct elf_x86_link_hash_table
446 struct elf_link_hash_table elf
;
448 /* Short-cuts to get to dynamic linker sections. */
450 asection
*plt_eh_frame
;
451 asection
*plt_second
;
452 asection
*plt_second_eh_frame
;
454 asection
*plt_got_eh_frame
;
456 /* Parameters describing PLT generation, lazy or non-lazy. */
457 struct elf_x86_plt_layout plt
;
459 /* Parameters describing lazy PLT generation. */
460 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
462 /* Parameters describing non-lazy PLT generation. */
463 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
467 bfd_signed_vma refcount
;
471 /* The amount of space used by the jump slots in the GOT. */
472 bfd_vma sgotplt_jump_table_size
;
474 /* _TLS_MODULE_BASE_ symbol. */
475 struct bfd_link_hash_entry
*tls_module_base
;
477 /* Used by local STT_GNU_IFUNC symbols. */
478 htab_t loc_hash_table
;
479 void * loc_hash_memory
;
481 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
482 bfd_vma next_jump_slot_index
;
483 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
484 bfd_vma next_irelative_index
;
486 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks.
487 This is used for i386 only. */
490 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. This
491 is only used for i386. */
492 bfd_vma next_tls_desc_index
;
494 /* Value used to fill the unused bytes of the first PLT entry. This
495 is only used for i386. */
496 bfd_byte plt0_pad_byte
;
498 /* TRUE if GOT is referenced. */
499 unsigned int got_referenced
: 1;
501 /* TRUE if PLT is PC-relative. PLT in PDE and PC-relative PLT in PIE
502 can be used as function address.
504 NB: i386 has non-PIC PLT and PIC PLT. Only non-PIC PLT in PDE can
505 be used as function address. PIC PLT in PIE can't be used as
507 unsigned int pcrel_plt
: 1;
509 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
510 bfd_vma (*r_sym
) (bfd_vma
);
511 bool (*is_reloc_section
) (const char *);
512 unsigned int sizeof_reloc
;
513 unsigned int got_entry_size
;
514 unsigned int pointer_r_type
;
515 int dynamic_interpreter_size
;
516 const char *dynamic_interpreter
;
517 const char *tls_get_addr
;
519 /* Options passed from the linker. */
520 struct elf_linker_x86_params
*params
;
523 struct elf_x86_init_table
525 /* The lazy PLT layout. */
526 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
528 /* The non-lazy PLT layout. */
529 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
531 /* The lazy PLT layout for IBT. */
532 const struct elf_x86_lazy_plt_layout
*lazy_ibt_plt
;
534 /* The non-lazy PLT layout for IBT. */
535 const struct elf_x86_non_lazy_plt_layout
*non_lazy_ibt_plt
;
537 bfd_byte plt0_pad_byte
;
539 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
540 bfd_vma (*r_sym
) (bfd_vma
);
543 struct elf_x86_obj_tdata
545 struct elf_obj_tdata root
;
547 /* tls_type for each local got entry. */
548 char *local_got_tls_type
;
550 /* GOTPLT entries for TLS descriptors. */
551 bfd_vma
*local_tlsdesc_gotent
;
553 /* Set if the objec file has 16-bit code. */
554 unsigned int has_code16
: 1;
557 enum elf_x86_plt_type
571 enum elf_x86_plt_type type
;
572 unsigned int plt_got_offset
;
573 unsigned int plt_entry_size
;
574 unsigned int plt_got_insn_size
; /* Only used for x86-64. */
578 /* Set if a relocation is converted from a GOTPCREL relocation. */
579 #define R_X86_64_converted_reloc_bit (1 << 7)
581 #define elf_x86_tdata(abfd) \
582 ((struct elf_x86_obj_tdata *) (abfd)->tdata.any)
584 #define elf_x86_local_got_tls_type(abfd) \
585 (elf_x86_tdata (abfd)->local_got_tls_type)
587 #define elf_x86_local_tlsdesc_gotent(abfd) \
588 (elf_x86_tdata (abfd)->local_tlsdesc_gotent)
590 #define elf_x86_has_code16(abfd) \
591 (elf_x86_tdata (abfd)->has_code16)
593 #define elf_x86_compute_jump_table_size(htab) \
594 ((htab)->elf.srelplt->reloc_count * (htab)->got_entry_size)
596 #define is_x86_elf(bfd, htab) \
597 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
598 && elf_tdata (bfd) != NULL \
599 && elf_object_id (bfd) == (htab)->elf.hash_table_id)
601 extern bool _bfd_x86_elf_mkobject
604 extern void _bfd_x86_elf_set_tls_module_base
605 (struct bfd_link_info
*);
607 extern bfd_vma _bfd_x86_elf_dtpoff_base
608 (struct bfd_link_info
*);
610 extern bool _bfd_x86_elf_readonly_dynrelocs
611 (struct elf_link_hash_entry
*, void *);
613 extern struct elf_link_hash_entry
* _bfd_elf_x86_get_local_sym_hash
614 (struct elf_x86_link_hash_table
*, bfd
*, const Elf_Internal_Rela
*,
617 extern hashval_t _bfd_x86_elf_local_htab_hash
620 extern int _bfd_x86_elf_local_htab_eq
621 (const void *, const void *);
623 extern struct bfd_hash_entry
* _bfd_x86_elf_link_hash_newfunc
624 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
626 extern struct bfd_link_hash_table
* _bfd_x86_elf_link_hash_table_create
629 extern int _bfd_x86_elf_compare_relocs
630 (const void *, const void *);
632 extern bool _bfd_x86_elf_link_check_relocs
633 (bfd
*, struct bfd_link_info
*);
635 extern bool _bfd_elf_x86_valid_reloc_p
636 (asection
*, struct bfd_link_info
*, struct elf_x86_link_hash_table
*,
637 const Elf_Internal_Rela
*, struct elf_link_hash_entry
*,
638 Elf_Internal_Sym
*, Elf_Internal_Shdr
*, bool *);
640 extern bool _bfd_x86_elf_size_dynamic_sections
641 (bfd
*, struct bfd_link_info
*);
643 extern struct elf_x86_link_hash_table
*_bfd_x86_elf_finish_dynamic_sections
644 (bfd
*, struct bfd_link_info
*);
646 extern bool _bfd_x86_elf_always_size_sections
647 (bfd
*, struct bfd_link_info
*);
649 extern void _bfd_x86_elf_merge_symbol_attribute
650 (struct elf_link_hash_entry
*, unsigned int, bool, bool);
652 extern void _bfd_x86_elf_copy_indirect_symbol
653 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
654 struct elf_link_hash_entry
*);
656 extern bool _bfd_x86_elf_fixup_symbol
657 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
659 extern bool _bfd_x86_elf_hash_symbol
660 (struct elf_link_hash_entry
*);
662 extern bool _bfd_x86_elf_adjust_dynamic_symbol
663 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
665 extern void _bfd_x86_elf_hide_symbol
666 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bool);
668 extern bool _bfd_x86_elf_link_symbol_references_local
669 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
671 extern asection
* _bfd_x86_elf_gc_mark_hook
672 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
673 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
675 extern long _bfd_x86_elf_get_synthetic_symtab
676 (bfd
*, long, long, bfd_vma
, struct elf_x86_plt
[], asymbol
**,
679 extern enum elf_property_kind _bfd_x86_elf_parse_gnu_properties
680 (bfd
*, unsigned int, bfd_byte
*, unsigned int);
682 extern bool _bfd_x86_elf_merge_gnu_properties
683 (struct bfd_link_info
*, bfd
*, bfd
*, elf_property
*, elf_property
*);
685 extern void _bfd_x86_elf_link_fixup_gnu_properties
686 (struct bfd_link_info
*, elf_property_list
**);
688 extern bfd
* _bfd_x86_elf_link_setup_gnu_properties
689 (struct bfd_link_info
*, struct elf_x86_init_table
*);
691 extern void _bfd_x86_elf_link_fixup_ifunc_symbol
692 (struct bfd_link_info
*, struct elf_x86_link_hash_table
*,
693 struct elf_link_hash_entry
*, Elf_Internal_Sym
*sym
);
695 extern void _bfd_x86_elf_link_report_relative_reloc
696 (struct bfd_link_info
*, asection
*, struct elf_link_hash_entry
*,
697 Elf_Internal_Sym
*, const char *, const void *);
699 #define bfd_elf64_mkobject \
700 _bfd_x86_elf_mkobject
701 #define bfd_elf32_mkobject \
702 _bfd_x86_elf_mkobject
703 #define bfd_elf64_bfd_link_hash_table_create \
704 _bfd_x86_elf_link_hash_table_create
705 #define bfd_elf32_bfd_link_hash_table_create \
706 _bfd_x86_elf_link_hash_table_create
707 #define bfd_elf64_bfd_link_check_relocs \
708 _bfd_x86_elf_link_check_relocs
709 #define bfd_elf32_bfd_link_check_relocs \
710 _bfd_x86_elf_link_check_relocs
712 #define elf_backend_size_dynamic_sections \
713 _bfd_x86_elf_size_dynamic_sections
714 #define elf_backend_always_size_sections \
715 _bfd_x86_elf_always_size_sections
716 #define elf_backend_merge_symbol_attribute \
717 _bfd_x86_elf_merge_symbol_attribute
718 #define elf_backend_copy_indirect_symbol \
719 _bfd_x86_elf_copy_indirect_symbol
720 #define elf_backend_fixup_symbol \
721 _bfd_x86_elf_fixup_symbol
722 #define elf_backend_hash_symbol \
723 _bfd_x86_elf_hash_symbol
724 #define elf_backend_adjust_dynamic_symbol \
725 _bfd_x86_elf_adjust_dynamic_symbol
726 #define elf_backend_gc_mark_hook \
727 _bfd_x86_elf_gc_mark_hook
728 #define elf_backend_omit_section_dynsym \
729 _bfd_elf_omit_section_dynsym_all
730 #define elf_backend_parse_gnu_properties \
731 _bfd_x86_elf_parse_gnu_properties
732 #define elf_backend_merge_gnu_properties \
733 _bfd_x86_elf_merge_gnu_properties
734 #define elf_backend_fixup_gnu_properties \
735 _bfd_x86_elf_link_fixup_gnu_properties