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0afcef53 | 1 | /* x86 specific support for ELF |
d87bef3a | 2 | Copyright (C) 2017-2023 Free Software Foundation, Inc. |
0afcef53 L |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
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. */ | |
20 | ||
d1bcae83 | 21 | /* Don't generate unused section symbols. */ |
0a1b45a2 | 22 | #define TARGET_KEEP_UNUSED_SECTION_SYMBOLS false |
d1bcae83 | 23 | |
0afcef53 L |
24 | #include "sysdep.h" |
25 | #include "bfd.h" | |
26 | #include "bfdlink.h" | |
27 | #include "libbfd.h" | |
28 | #include "elf-bfd.h" | |
0afcef53 | 29 | #include "hashtab.h" |
5b9c07b2 | 30 | #include "elf-linker-x86.h" |
831083d3 L |
31 | #include "elf/i386.h" |
32 | #include "elf/x86-64.h" | |
cf0e0a0b | 33 | #include "sframe-api.h" |
831083d3 L |
34 | |
35 | #define X86_64_PCREL_TYPE_P(TYPE) \ | |
36 | ((TYPE) == R_X86_64_PC8 \ | |
37 | || (TYPE) == R_X86_64_PC16 \ | |
38 | || (TYPE) == R_X86_64_PC32 \ | |
831083d3 L |
39 | || (TYPE) == R_X86_64_PC64) |
40 | #define I386_PCREL_TYPE_P(TYPE) ((TYPE) == R_386_PC32) | |
41 | #define X86_PCREL_TYPE_P(IS_X86_64, TYPE) \ | |
42 | ((IS_X86_64) ? X86_64_PCREL_TYPE_P (TYPE) : I386_PCREL_TYPE_P (TYPE)) | |
43 | ||
44 | #define X86_64_SIZE_TYPE_P(TYPE) \ | |
45 | ((TYPE) == R_X86_64_SIZE32 || (TYPE) == R_X86_64_SIZE64) | |
46 | #define I386_SIZE_TYPE_P(TYPE) ((TYPE) == R_386_SIZE32) | |
47 | #define X86_SIZE_TYPE_P(IS_X86_64, TYPE) \ | |
48 | ((IS_X86_64) ? X86_64_SIZE_TYPE_P(TYPE) : I386_SIZE_TYPE_P (TYPE)) | |
0afcef53 | 49 | |
5af6f000 L |
50 | #define X86_64_GOT_TYPE_P(TYPE) \ |
51 | ((TYPE) == R_X86_64_GOTPCREL \ | |
52 | || (TYPE) == R_X86_64_GOTPCRELX \ | |
8d26ee1c L |
53 | || (TYPE) == R_X86_64_REX_GOTPCRELX \ |
54 | || (TYPE) == R_X86_64_GOT32 \ | |
55 | || (TYPE) == R_X86_64_GOT64 \ | |
56 | || (TYPE) == R_X86_64_GOTPCREL64 \ | |
57 | || (TYPE) == R_X86_64_GOTPLT64) | |
5af6f000 L |
58 | #define I386_GOT_TYPE_P(TYPE) \ |
59 | ((TYPE) == R_386_GOT32 || (TYPE) == R_386_GOT32X) | |
60 | #define X86_GOT_TYPE_P(IS_X86_64, TYPE) \ | |
61 | ((IS_X86_64) ? X86_64_GOT_TYPE_P (TYPE) : I386_GOT_TYPE_P (TYPE)) | |
62 | ||
63 | #define X86_64_RELATIVE_RELOC_TYPE_P(TYPE) \ | |
64 | (X86_64_PCREL_TYPE_P (TYPE) \ | |
3747999c L |
65 | || (TYPE) == R_X86_64_8 \ |
66 | || (TYPE) == R_X86_64_16 \ | |
67 | || (TYPE) == R_X86_64_32 \ | |
68 | || (TYPE) == R_X86_64_32S \ | |
69 | || (TYPE) == R_X86_64_64) | |
5af6f000 L |
70 | #define I386_RELATIVE_RELOC_TYPE_P(TYPE) \ |
71 | ((TYPE) == R_386_32 || (TYPE) == R_386_PC32) | |
72 | #define X86_RELATIVE_RELOC_TYPE_P(IS_X86_64, TYPE) \ | |
73 | ((IS_X86_64) \ | |
74 | ? X86_64_RELATIVE_RELOC_TYPE_P (TYPE) \ | |
75 | : I386_RELATIVE_RELOC_TYPE_P(TYPE)) | |
76 | ||
77 | #define X86_64_NEED_DYNAMIC_RELOC_TYPE_P(TYPE) \ | |
78 | (X86_64_SIZE_TYPE_P (TYPE) \ | |
79 | || X86_64_RELATIVE_RELOC_TYPE_P (TYPE)) | |
3747999c L |
80 | #define I386_NEED_DYNAMIC_RELOC_TYPE_P(TYPE) \ |
81 | (I386_SIZE_TYPE_P (TYPE) \ | |
5af6f000 | 82 | || I386_RELATIVE_RELOC_TYPE_P (TYPE) \ |
3319ba7a | 83 | || (TYPE) == R_386_TLS_IE \ |
3747999c L |
84 | || (TYPE) == R_386_TLS_LE \ |
85 | || (TYPE) == R_386_TLS_LE_32) | |
86 | #define X86_NEED_DYNAMIC_RELOC_TYPE_P(IS_X86_64, TYPE) \ | |
87 | ((IS_X86_64) \ | |
88 | ? X86_64_NEED_DYNAMIC_RELOC_TYPE_P (TYPE) \ | |
89 | : I386_NEED_DYNAMIC_RELOC_TYPE_P (TYPE)) | |
90 | ||
5af6f000 L |
91 | #define X86_LOCAL_GOT_RELATIVE_RELOC_P(IS_X86_64, INFO, SYM) \ |
92 | (bfd_link_pic (INFO) \ | |
93 | && (!(IS_X86_64) || ((SYM) != NULL && (SYM)->st_shndx != SHN_ABS))) | |
94 | ||
aa595247 L |
95 | #define PLT_CIE_LENGTH 20 |
96 | #define PLT_FDE_LENGTH 36 | |
97 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
98 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
99 | ||
cf0e0a0b IB |
100 | /* This must be the same as sframe_get_hdr_size (sfh). For x86-64, this value |
101 | is the same as sizeof (sframe_header) because there is no SFrame auxilliary | |
102 | header. */ | |
103 | #define PLT_SFRAME_FDE_START_OFFSET sizeof (sframe_header) | |
104 | ||
765e526c L |
105 | #define ABI_64_P(abfd) \ |
106 | (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64) | |
107 | ||
0afcef53 L |
108 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
109 | copying dynamic variables from a shared lib into an app's dynbss | |
110 | section, and instead use a dynamic relocation to point into the | |
111 | shared lib. */ | |
112 | #define ELIMINATE_COPY_RELOCS 1 | |
113 | ||
114 | #define elf_x86_hash_table(p, id) \ | |
1cf58434 AM |
115 | (is_elf_hash_table ((p)->hash) \ |
116 | && elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) == (id) \ | |
0afcef53 L |
117 | ? ((struct elf_x86_link_hash_table *) ((p)->hash)) : NULL) |
118 | ||
6999821f L |
119 | /* Will references to this symbol always be local in this object? */ |
120 | #define SYMBOL_REFERENCES_LOCAL_P(INFO, H) \ | |
121 | _bfd_x86_elf_link_symbol_references_local ((INFO), (H)) | |
122 | ||
99180bcc L |
123 | /* TRUE if an undefined weak symbol should be resolved to 0. Local |
124 | undefined weak symbol is always resolved to 0. Reference to an | |
125 | undefined weak symbol is resolved to 0 in executable if undefined | |
126 | weak symbol should be resolved to 0 (zero_undefweak > 0). */ | |
c5bce5c6 | 127 | #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \ |
0afcef53 | 128 | ((EH)->elf.root.type == bfd_link_hash_undefweak \ |
6999821f | 129 | && (SYMBOL_REFERENCES_LOCAL_P ((INFO), &(EH)->elf) \ |
0afcef53 | 130 | || (bfd_link_executable (INFO) \ |
98b273dc | 131 | && (EH)->zero_undefweak > 0))) |
0afcef53 L |
132 | |
133 | /* Should copy relocation be generated for a symbol. Don't generate | |
134 | copy relocation against a protected symbol defined in a shared | |
f6386577 | 135 | object. */ |
0afcef53 L |
136 | #define SYMBOL_NO_COPYRELOC(INFO, EH) \ |
137 | ((EH)->def_protected \ | |
138 | && ((EH)->elf.root.type == bfd_link_hash_defined \ | |
139 | || (EH)->elf.root.type == bfd_link_hash_defweak) \ | |
0afcef53 L |
140 | && ((EH)->elf.root.u.def.section->owner->flags & DYNAMIC) != 0 \ |
141 | && ((EH)->elf.root.u.def.section->flags & SEC_CODE) == 0) | |
142 | ||
daf1c414 L |
143 | /* TRUE if dynamic relocation is needed. If we are creating a shared |
144 | library, and this is a reloc against a global symbol, or a non PC | |
145 | relative reloc against a local symbol, then we need to copy the reloc | |
146 | into the shared library. However, if we are linking with -Bsymbolic, | |
147 | we do not need to copy a reloc against a global symbol which is | |
148 | defined in an object we are including in the link (i.e., DEF_REGULAR | |
451875b4 L |
149 | is set). |
150 | ||
151 | If PCREL_PLT is true, don't generate dynamic relocation in PIE for | |
152 | PC-relative relocation against a dynamic function definition in data | |
153 | section when PLT address can be used. | |
daf1c414 L |
154 | |
155 | If on the other hand, we are creating an executable, we may need to | |
156 | keep relocations for symbols satisfied by a dynamic library if we | |
157 | manage to avoid copy relocs for the symbol. | |
158 | ||
159 | We also need to generate dynamic pointer relocation against | |
160 | STT_GNU_IFUNC symbol in the non-code section. */ | |
831083d3 L |
161 | #define NEED_DYNAMIC_RELOCATION_P(IS_X86_64, INFO, PCREL_PLT, H, SEC, \ |
162 | R_TYPE, POINTER_TYPE) \ | |
daf1c414 | 163 | ((bfd_link_pic (INFO) \ |
831083d3 | 164 | && (! X86_PCREL_TYPE_P (IS_X86_64, R_TYPE) \ |
daf1c414 L |
165 | || ((H) != NULL \ |
166 | && (! (bfd_link_pie (INFO) \ | |
167 | || SYMBOLIC_BIND ((INFO), (H))) \ | |
168 | || (H)->root.type == bfd_link_hash_defweak \ | |
451875b4 L |
169 | || (!(bfd_link_pie (INFO) \ |
170 | && (PCREL_PLT) \ | |
171 | && (H)->plt.refcount > 0 \ | |
172 | && ((SEC)->flags & SEC_CODE) == 0 \ | |
173 | && (H)->type == STT_FUNC \ | |
174 | && (H)->def_dynamic) \ | |
175 | && !(H)->def_regular))))) \ | |
176 | || ((H) != NULL \ | |
177 | && (H)->type == STT_GNU_IFUNC \ | |
178 | && (R_TYPE) == POINTER_TYPE \ | |
179 | && ((SEC)->flags & SEC_CODE) == 0) \ | |
180 | || (ELIMINATE_COPY_RELOCS \ | |
181 | && !bfd_link_pic (INFO) \ | |
182 | && (H) != NULL \ | |
183 | && ((H)->root.type == bfd_link_hash_defweak \ | |
184 | || !(H)->def_regular))) | |
daf1c414 | 185 | |
aebcc8ff L |
186 | /* TRUE if dynamic relocation should be generated. Don't copy a |
187 | pc-relative relocation into the output file if the symbol needs | |
188 | copy reloc or the symbol is undefined when building executable. | |
189 | Copy dynamic function pointer relocations. Don't generate dynamic | |
190 | relocations against resolved undefined weak symbols in PIE, except | |
191 | when PC32_RELOC is TRUE. Undefined weak symbol is bound locally | |
382aae06 | 192 | when PIC is false. Don't generate dynamic relocations against |
5af6f000 L |
193 | non-preemptible absolute symbol. NB: rel_from_abs is set on symbols |
194 | defined by linker scripts from "dot" (also SEGMENT_START or ORIGIN) | |
195 | outside of an output section statement, which will be converted from | |
196 | absolute to section-relative in set_sym_sections called from | |
197 | ldexp_finalize_syms after ldemul_finish. */ | |
831083d3 L |
198 | #define GENERATE_DYNAMIC_RELOCATION_P(IS_X86_64, INFO, EH, R_TYPE, \ |
199 | SEC, NEED_COPY_RELOC_IN_PIE, \ | |
aebcc8ff L |
200 | RESOLVED_TO_ZERO, PC32_RELOC) \ |
201 | ((bfd_link_pic (INFO) \ | |
382aae06 | 202 | && !(bfd_is_abs_section (SEC) \ |
5af6f000 L |
203 | && ((EH) == NULL \ |
204 | || (EH)->elf.root.rel_from_abs == 0) \ | |
382aae06 L |
205 | && ((EH) == NULL \ |
206 | || SYMBOL_REFERENCES_LOCAL (INFO, &(EH)->elf))) \ | |
aebcc8ff L |
207 | && !(NEED_COPY_RELOC_IN_PIE) \ |
208 | && ((EH) == NULL \ | |
209 | || ((ELF_ST_VISIBILITY ((EH)->elf.other) == STV_DEFAULT \ | |
210 | && (!(RESOLVED_TO_ZERO) || PC32_RELOC)) \ | |
211 | || (EH)->elf.root.type != bfd_link_hash_undefweak)) \ | |
831083d3 L |
212 | && ((!X86_PCREL_TYPE_P (IS_X86_64, R_TYPE) \ |
213 | && !X86_SIZE_TYPE_P (IS_X86_64, R_TYPE)) \ | |
433953ff L |
214 | || ! SYMBOL_CALLS_LOCAL ((INFO), \ |
215 | (struct elf_link_hash_entry *) (EH)))) \ | |
aebcc8ff L |
216 | || (ELIMINATE_COPY_RELOCS \ |
217 | && !bfd_link_pic (INFO) \ | |
218 | && (EH) != NULL \ | |
219 | && (EH)->elf.dynindx != -1 \ | |
220 | && (!(EH)->elf.non_got_ref \ | |
aebcc8ff L |
221 | || ((EH)->elf.root.type == bfd_link_hash_undefweak \ |
222 | && !(RESOLVED_TO_ZERO))) \ | |
223 | && (((EH)->elf.def_dynamic && !(EH)->elf.def_regular) \ | |
224 | || (EH)->elf.root.type == bfd_link_hash_undefined))) | |
225 | ||
e74399c4 L |
226 | /* TRUE if this input relocation should be copied to output. H->dynindx |
227 | may be -1 if this symbol was marked to become local. */ | |
831083d3 | 228 | #define COPY_INPUT_RELOC_P(IS_X86_64, INFO, H, R_TYPE) \ |
e74399c4 L |
229 | ((H) != NULL \ |
230 | && (H)->dynindx != -1 \ | |
831083d3 | 231 | && (X86_PCREL_TYPE_P (IS_X86_64, R_TYPE) \ |
e74399c4 L |
232 | || !(bfd_link_executable (INFO) || SYMBOLIC_BIND ((INFO), (H))) \ |
233 | || !(H)->def_regular)) | |
234 | ||
2eba97c2 L |
235 | /* TRUE if this is actually a static link, or it is a -Bsymbolic link |
236 | and the symbol is defined locally, or the symbol was forced to be | |
237 | local because of a version file. */ | |
238 | #define RESOLVED_LOCALLY_P(INFO, H, HTAB) \ | |
239 | (!WILL_CALL_FINISH_DYNAMIC_SYMBOL ((HTAB)->elf.dynamic_sections_created, \ | |
240 | bfd_link_pic (INFO), (H)) \ | |
241 | || (bfd_link_pic (INFO) \ | |
242 | && SYMBOL_REFERENCES_LOCAL_P ((INFO), (H))) \ | |
243 | || (ELF_ST_VISIBILITY ((H)->other) \ | |
244 | && (H)->root.type == bfd_link_hash_undefweak)) | |
245 | ||
83924b38 L |
246 | /* TRUE if this symbol isn't defined by a shared object. */ |
247 | #define SYMBOL_DEFINED_NON_SHARED_P(H) \ | |
248 | ((H)->def_regular \ | |
249 | || (H)->root.linker_def \ | |
250 | || (H)->root.ldscript_def \ | |
4e84a8f8 | 251 | || ((struct elf_x86_link_hash_entry *) (H))->linker_def \ |
83924b38 L |
252 | || ELF_COMMON_DEF_P (H)) |
253 | ||
382aae06 L |
254 | /* Return TRUE if the symbol described by a linker hash entry H is |
255 | going to be absolute. Similar to bfd_is_abs_symbol, but excluding | |
256 | all linker-script defined symbols. */ | |
257 | #define ABS_SYMBOL_P(H) \ | |
258 | (bfd_is_abs_symbol (&(H)->root) && !(H)->root.ldscript_def) | |
259 | ||
f70656b2 L |
260 | /* TRUE if relative relocation should be generated. GOT reference to |
261 | global symbol in PIC will lead to dynamic symbol. It becomes a | |
262 | problem when "time" or "times" is defined as a variable in an | |
263 | executable, clashing with functions of the same name in libc. If a | |
264 | symbol isn't undefined weak symbol, don't make it dynamic in PIC and | |
382aae06 L |
265 | generate relative relocation. Don't generate relative relocation |
266 | against non-preemptible absolute symbol. */ | |
f70656b2 L |
267 | #define GENERATE_RELATIVE_RELOC_P(INFO, H) \ |
268 | ((H)->dynindx == -1 \ | |
269 | && !(H)->forced_local \ | |
270 | && (H)->root.type != bfd_link_hash_undefweak \ | |
382aae06 L |
271 | && bfd_link_pic (INFO) \ |
272 | && !ABS_SYMBOL_P (H)) | |
f70656b2 | 273 | |
cf1070f1 L |
274 | /* TRUE if this is a pointer reference to a local IFUNC. */ |
275 | #define POINTER_LOCAL_IFUNC_P(INFO, H) \ | |
276 | ((H)->dynindx == -1 \ | |
277 | || (H)->forced_local \ | |
278 | || bfd_link_executable (INFO)) | |
279 | ||
280 | /* TRUE if this is a PLT reference to a local IFUNC. */ | |
281 | #define PLT_LOCAL_IFUNC_P(INFO, H) \ | |
282 | ((H)->dynindx == -1 \ | |
283 | || ((bfd_link_executable (INFO) \ | |
284 | || ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT) \ | |
285 | && (H)->def_regular \ | |
286 | && (H)->type == STT_GNU_IFUNC)) | |
287 | ||
51537393 L |
288 | /* TRUE if TLS IE->LE transition is OK. */ |
289 | #define TLS_TRANSITION_IE_TO_LE_P(INFO, H, TLS_TYPE) \ | |
290 | (bfd_link_executable (INFO) \ | |
291 | && (H) != NULL \ | |
292 | && (H)->dynindx == -1 \ | |
293 | && (TLS_TYPE & GOT_TLS_IE)) | |
294 | ||
f3180fa9 L |
295 | /* Verify that the symbol has an entry in the procedure linkage table. */ |
296 | #define VERIFY_PLT_ENTRY(INFO, H, PLT, GOTPLT, RELPLT, LOCAL_UNDEFWEAK) \ | |
e0d8f431 L |
297 | do \ |
298 | { \ | |
299 | if (((H)->dynindx == -1 \ | |
300 | && !LOCAL_UNDEFWEAK \ | |
301 | && !(((H)->forced_local || bfd_link_executable (INFO)) \ | |
302 | && (H)->def_regular \ | |
303 | && (H)->type == STT_GNU_IFUNC)) \ | |
304 | || (PLT) == NULL \ | |
305 | || (GOTPLT) == NULL \ | |
306 | || (RELPLT) == NULL) \ | |
307 | abort (); \ | |
308 | } \ | |
309 | while (0); | |
f3180fa9 | 310 | |
ff38b4cc L |
311 | /* Verify that the symbol supports copy relocation. */ |
312 | #define VERIFY_COPY_RELOC(H, HTAB) \ | |
e0d8f431 L |
313 | do \ |
314 | { \ | |
315 | if ((H)->dynindx == -1 \ | |
316 | || ((H)->root.type != bfd_link_hash_defined \ | |
317 | && (H)->root.type != bfd_link_hash_defweak) \ | |
318 | || (HTAB)->elf.srelbss == NULL \ | |
319 | || (HTAB)->elf.sreldynrelro == NULL) \ | |
320 | abort (); \ | |
321 | } \ | |
322 | while (0); | |
ff38b4cc | 323 | |
0afcef53 L |
324 | /* x86 ELF linker hash entry. */ |
325 | ||
326 | struct elf_x86_link_hash_entry | |
327 | { | |
328 | struct elf_link_hash_entry elf; | |
329 | ||
0afcef53 L |
330 | unsigned char tls_type; |
331 | ||
98b273dc L |
332 | /* Bit 0: Symbol has no GOT nor PLT relocations. |
333 | Bit 1: Symbol has non-GOT/non-PLT relocations in text sections. | |
334 | zero_undefweak is initialized to 1 and undefined weak symbol | |
335 | should be resolved to 0 if zero_undefweak > 0. */ | |
336 | unsigned int zero_undefweak : 2; | |
0afcef53 L |
337 | |
338 | /* Don't call finish_dynamic_symbol on this symbol. */ | |
339 | unsigned int no_finish_dynamic_symbol : 1; | |
340 | ||
5af6f000 L |
341 | /* R_*_RELATIVE relocation in GOT for this symbol has been |
342 | processed. */ | |
343 | unsigned int got_relative_reloc_done : 1; | |
344 | ||
0afcef53 L |
345 | /* TRUE if symbol is __tls_get_addr. */ |
346 | unsigned int tls_get_addr : 1; | |
347 | ||
348 | /* TRUE if symbol is defined as a protected symbol. */ | |
349 | unsigned int def_protected : 1; | |
350 | ||
6999821f L |
351 | /* 0: Symbol references are unknown. |
352 | 1: Symbol references aren't local. | |
353 | 2: Symbol references are local. | |
354 | */ | |
355 | unsigned int local_ref : 2; | |
356 | ||
0a27fed7 L |
357 | /* TRUE if symbol is defined by linker. */ |
358 | unsigned int linker_def : 1; | |
359 | ||
6f365fda L |
360 | /* TRUE if symbol is referenced by a non-GOT/non-PLT relocation in a |
361 | relocatable object file without indirect external access marker. */ | |
362 | unsigned int non_got_ref_without_indirect_extern_access : 1; | |
363 | ||
f47432d4 | 364 | /* TRUE if symbol is referenced by R_386_GOTOFF relocation. This is |
c7df954f | 365 | only used by i386. */ |
0afcef53 L |
366 | unsigned int gotoff_ref : 1; |
367 | ||
368 | /* TRUE if a weak symbol with a real definition needs a copy reloc. | |
369 | When there is a weak symbol with a real definition, the processor | |
370 | independent code will have arranged for us to see the real | |
371 | definition first. We need to copy the needs_copy bit from the | |
372 | real definition and check it when allowing copy reloc in PIE. This | |
373 | is only used by x86-64. */ | |
374 | unsigned int needs_copy : 1; | |
375 | ||
0afcef53 L |
376 | /* Information about the GOT PLT entry. Filled when there are both |
377 | GOT and PLT relocations against the same function. */ | |
378 | union gotplt_union plt_got; | |
379 | ||
380 | /* Information about the second PLT entry. */ | |
381 | union gotplt_union plt_second; | |
382 | ||
383 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, | |
384 | starting at the end of the jump table. */ | |
385 | bfd_vma tlsdesc_got; | |
386 | }; | |
387 | ||
cf0e0a0b IB |
388 | #define SFRAME_PLT0_MAX_NUM_FRES 2 |
389 | #define SFRAME_PLTN_MAX_NUM_FRES 2 | |
390 | ||
391 | struct elf_x86_sframe_plt | |
392 | { | |
393 | unsigned int plt0_entry_size; | |
394 | unsigned int plt0_num_fres; | |
395 | const sframe_frame_row_entry *plt0_fres[SFRAME_PLT0_MAX_NUM_FRES]; | |
396 | ||
397 | unsigned int pltn_entry_size; | |
398 | unsigned int pltn_num_fres; | |
399 | const sframe_frame_row_entry *pltn_fres[SFRAME_PLTN_MAX_NUM_FRES]; | |
400 | ||
401 | unsigned int sec_pltn_entry_size; | |
402 | unsigned int sec_pltn_num_fres; | |
403 | const sframe_frame_row_entry *sec_pltn_fres[SFRAME_PLTN_MAX_NUM_FRES]; | |
404 | }; | |
405 | ||
765e526c L |
406 | struct elf_x86_lazy_plt_layout |
407 | { | |
92e68c1d | 408 | /* The first entry in a lazy procedure linkage table looks like this. */ |
765e526c | 409 | const bfd_byte *plt0_entry; |
07d6d2b8 | 410 | unsigned int plt0_entry_size; /* Size of PLT0 entry. */ |
765e526c | 411 | |
92e68c1d | 412 | /* Later entries in a lazy procedure linkage table look like this. */ |
765e526c | 413 | const bfd_byte *plt_entry; |
07d6d2b8 | 414 | unsigned int plt_entry_size; /* Size of each PLT entry. */ |
765e526c | 415 | |
92e68c1d L |
416 | /* The TLSDESC entry in a lazy procedure linkage table looks like |
417 | this. This is for x86-64 only. */ | |
418 | const bfd_byte *plt_tlsdesc_entry; | |
419 | unsigned int plt_tlsdesc_entry_size; /* Size of TLSDESC entry. */ | |
420 | ||
421 | /* Offsets into the TLSDESC entry that are to be replaced with | |
422 | GOT+8 and GOT+TDG. These are for x86-64 only. */ | |
423 | unsigned int plt_tlsdesc_got1_offset; | |
424 | unsigned int plt_tlsdesc_got2_offset; | |
425 | ||
426 | /* Offset of the end of the PC-relative instructions containing | |
427 | plt_tlsdesc_got1_offset and plt_tlsdesc_got2_offset. These | |
428 | are for x86-64 only. */ | |
429 | unsigned int plt_tlsdesc_got1_insn_end; | |
430 | unsigned int plt_tlsdesc_got2_insn_end; | |
431 | ||
765e526c L |
432 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and |
433 | GOT[2]. */ | |
434 | unsigned int plt0_got1_offset; | |
435 | unsigned int plt0_got2_offset; | |
436 | ||
437 | /* Offset of the end of the PC-relative instruction containing | |
438 | plt0_got2_offset. This is for x86-64 only. */ | |
439 | unsigned int plt0_got2_insn_end; | |
440 | ||
441 | /* Offsets into plt_entry that are to be replaced with... */ | |
442 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
443 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
444 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
445 | ||
446 | /* Length of the PC-relative instruction containing plt_got_offset. | |
447 | This is used for x86-64 only. */ | |
448 | unsigned int plt_got_insn_size; | |
449 | ||
450 | /* Offset of the end of the PC-relative jump to plt0_entry. This is | |
451 | used for x86-64 only. */ | |
452 | unsigned int plt_plt_insn_end; | |
453 | ||
454 | /* Offset into plt_entry where the initial value of the GOT entry | |
455 | points. */ | |
456 | unsigned int plt_lazy_offset; | |
457 | ||
458 | /* The first entry in a PIC lazy procedure linkage table looks like | |
a6798bab | 459 | this. */ |
765e526c L |
460 | const bfd_byte *pic_plt0_entry; |
461 | ||
462 | /* Subsequent entries in a PIC lazy procedure linkage table look | |
a6798bab | 463 | like this. */ |
765e526c L |
464 | const bfd_byte *pic_plt_entry; |
465 | ||
466 | /* .eh_frame covering the lazy .plt section. */ | |
467 | const bfd_byte *eh_frame_plt; | |
468 | unsigned int eh_frame_plt_size; | |
469 | }; | |
470 | ||
471 | struct elf_x86_non_lazy_plt_layout | |
472 | { | |
92e68c1d | 473 | /* Entries in a non-lazy procedure linkage table look like this. */ |
765e526c | 474 | const bfd_byte *plt_entry; |
92e68c1d L |
475 | /* Entries in a PIC non-lazy procedure linkage table look like this. |
476 | This is only used for i386 where absolute PLT and PIC PLT are | |
477 | different. */ | |
765e526c L |
478 | const bfd_byte *pic_plt_entry; |
479 | ||
07d6d2b8 | 480 | unsigned int plt_entry_size; /* Size of each PLT entry. */ |
765e526c L |
481 | |
482 | /* Offsets into plt_entry that are to be replaced with... */ | |
483 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
484 | ||
485 | /* Length of the PC-relative instruction containing plt_got_offset. | |
486 | This is used for x86-64 only. */ | |
487 | unsigned int plt_got_insn_size; | |
488 | ||
489 | /* .eh_frame covering the non-lazy .plt section. */ | |
490 | const bfd_byte *eh_frame_plt; | |
491 | unsigned int eh_frame_plt_size; | |
492 | }; | |
493 | ||
494 | struct elf_x86_plt_layout | |
495 | { | |
92e68c1d | 496 | /* The first entry in a lazy procedure linkage table looks like this. */ |
765e526c L |
497 | const bfd_byte *plt0_entry; |
498 | /* Entries in a procedure linkage table look like this. */ | |
499 | const bfd_byte *plt_entry; | |
07d6d2b8 | 500 | unsigned int plt_entry_size; /* Size of each PLT entry. */ |
765e526c L |
501 | |
502 | /* 1 has PLT0. */ | |
503 | unsigned int has_plt0; | |
504 | ||
505 | /* Offsets into plt_entry that are to be replaced with... */ | |
506 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
507 | ||
508 | /* Length of the PC-relative instruction containing plt_got_offset. | |
509 | This is only used for x86-64. */ | |
510 | unsigned int plt_got_insn_size; | |
511 | ||
b44ee3a8 L |
512 | /* Alignment of the .iplt section. */ |
513 | unsigned int iplt_alignment; | |
514 | ||
765e526c L |
515 | /* .eh_frame covering the .plt section. */ |
516 | const bfd_byte *eh_frame_plt; | |
517 | unsigned int eh_frame_plt_size; | |
518 | }; | |
519 | ||
6b9553e2 | 520 | /* Values in tls_type of x86 ELF linker hash entry. */ |
0afcef53 L |
521 | #define GOT_UNKNOWN 0 |
522 | #define GOT_NORMAL 1 | |
523 | #define GOT_TLS_GD 2 | |
6b9553e2 L |
524 | #define GOT_TLS_IE 4 |
525 | #define GOT_TLS_IE_POS 5 | |
526 | #define GOT_TLS_IE_NEG 6 | |
527 | #define GOT_TLS_IE_BOTH 7 | |
528 | #define GOT_TLS_GDESC 8 | |
382aae06 | 529 | #define GOT_ABS 9 |
6b9553e2 L |
530 | #define GOT_TLS_GD_BOTH_P(type) \ |
531 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
532 | #define GOT_TLS_GD_P(type) \ | |
533 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
534 | #define GOT_TLS_GDESC_P(type) \ | |
535 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
536 | #define GOT_TLS_GD_ANY_P(type) \ | |
537 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
0afcef53 L |
538 | |
539 | #define elf_x86_hash_entry(ent) \ | |
540 | ((struct elf_x86_link_hash_entry *)(ent)) | |
541 | ||
5af6f000 L |
542 | /* Information of an input relocation used to compute its contribution |
543 | to the DT_RELR section size. */ | |
544 | ||
545 | struct elf_x86_relative_reloc_record | |
546 | { | |
547 | /* The original relocation info. */ | |
548 | Elf_Internal_Rela rel; | |
549 | /* The input or the GOT section where the relocation is applied. */ | |
550 | asection *sec; | |
551 | /* Local symbol info. NULL for global symbol. */ | |
552 | Elf_Internal_Sym *sym; | |
553 | union | |
554 | { | |
555 | /* Section where the local symbol is defined. */ | |
556 | asection *sym_sec; | |
557 | /* Global symbol hash. */ | |
558 | struct elf_link_hash_entry *h; | |
559 | } u; | |
560 | /* The offset into the output section where the relative relocation | |
561 | will be applied at run-time. */ | |
562 | bfd_vma offset; | |
563 | /* The run-time address. */ | |
564 | bfd_vma address; | |
565 | }; | |
566 | ||
567 | struct elf_x86_relative_reloc_data | |
568 | { | |
569 | bfd_size_type count; | |
570 | bfd_size_type size; | |
571 | struct elf_x86_relative_reloc_record *data; | |
572 | }; | |
573 | ||
574 | /* DT_RELR bitmap. */ | |
575 | struct elf_dt_relr_bitmap | |
576 | { | |
577 | bfd_size_type count; | |
578 | bfd_size_type size; | |
579 | union | |
580 | { | |
581 | /* 32-bit bitmap. */ | |
582 | uint32_t *elf32; | |
583 | /* 64-bit bitmap. */ | |
584 | uint64_t *elf64; | |
585 | } u; | |
586 | }; | |
587 | ||
0afcef53 L |
588 | /* x86 ELF linker hash table. */ |
589 | ||
590 | struct elf_x86_link_hash_table | |
591 | { | |
592 | struct elf_link_hash_table elf; | |
593 | ||
594 | /* Short-cuts to get to dynamic linker sections. */ | |
595 | asection *interp; | |
596 | asection *plt_eh_frame; | |
597 | asection *plt_second; | |
598 | asection *plt_second_eh_frame; | |
599 | asection *plt_got; | |
600 | asection *plt_got_eh_frame; | |
601 | ||
cf0e0a0b IB |
602 | sframe_encoder_ctx *plt_cfe_ctx; |
603 | asection *plt_sframe; | |
604 | sframe_encoder_ctx *plt_second_cfe_ctx; | |
605 | asection *plt_second_sframe; | |
606 | ||
765e526c L |
607 | /* Parameters describing PLT generation, lazy or non-lazy. */ |
608 | struct elf_x86_plt_layout plt; | |
609 | ||
610 | /* Parameters describing lazy PLT generation. */ | |
611 | const struct elf_x86_lazy_plt_layout *lazy_plt; | |
612 | ||
613 | /* Parameters describing non-lazy PLT generation. */ | |
614 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
615 | ||
cf0e0a0b IB |
616 | /* The .sframe helper object for .plt section. |
617 | This is used for x86-64 only. */ | |
618 | const struct elf_x86_sframe_plt *sframe_plt; | |
619 | ||
0afcef53 L |
620 | union |
621 | { | |
622 | bfd_signed_vma refcount; | |
623 | bfd_vma offset; | |
624 | } tls_ld_or_ldm_got; | |
625 | ||
626 | /* The amount of space used by the jump slots in the GOT. */ | |
627 | bfd_vma sgotplt_jump_table_size; | |
628 | ||
0afcef53 L |
629 | /* _TLS_MODULE_BASE_ symbol. */ |
630 | struct bfd_link_hash_entry *tls_module_base; | |
631 | ||
632 | /* Used by local STT_GNU_IFUNC symbols. */ | |
633 | htab_t loc_hash_table; | |
634 | void * loc_hash_memory; | |
635 | ||
0afcef53 L |
636 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ |
637 | bfd_vma next_jump_slot_index; | |
638 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
639 | bfd_vma next_irelative_index; | |
640 | ||
765e526c L |
641 | /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. |
642 | This is used for i386 only. */ | |
643 | asection *srelplt2; | |
644 | ||
645 | /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. This | |
2926eb2c | 646 | is only used for i386. */ |
765e526c L |
647 | bfd_vma next_tls_desc_index; |
648 | ||
5af6f000 L |
649 | /* DT_RELR bitmap. */ |
650 | struct elf_dt_relr_bitmap dt_relr_bitmap; | |
651 | ||
652 | /* Relative relocation data. */ | |
653 | struct elf_x86_relative_reloc_data relative_reloc; | |
654 | ||
655 | /* Unaligned relative relocation data. */ | |
656 | struct elf_x86_relative_reloc_data unaligned_relative_reloc; | |
657 | ||
658 | /* Number of relative reloc generation pass. */ | |
659 | unsigned int generate_relative_reloc_pass; | |
660 | ||
851b6fa1 L |
661 | /* Value used to fill the unused bytes of the first PLT entry. This |
662 | is only used for i386. */ | |
663 | bfd_byte plt0_pad_byte; | |
664 | ||
cd048363 L |
665 | /* TRUE if GOT is referenced. */ |
666 | unsigned int got_referenced : 1; | |
667 | ||
451875b4 L |
668 | /* TRUE if PLT is PC-relative. PLT in PDE and PC-relative PLT in PIE |
669 | can be used as function address. | |
670 | ||
671 | NB: i386 has non-PIC PLT and PIC PLT. Only non-PIC PLT in PDE can | |
672 | be used as function address. PIC PLT in PIE can't be used as | |
673 | function address. */ | |
674 | unsigned int pcrel_plt : 1; | |
675 | ||
0afcef53 L |
676 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
677 | bfd_vma (*r_sym) (bfd_vma); | |
0a1b45a2 | 678 | bool (*is_reloc_section) (const char *); |
503294e7 | 679 | unsigned int sizeof_reloc; |
9ff114ca | 680 | unsigned int got_entry_size; |
0afcef53 | 681 | unsigned int pointer_r_type; |
5af6f000 | 682 | unsigned int relative_r_type; |
0afcef53 L |
683 | int dynamic_interpreter_size; |
684 | const char *dynamic_interpreter; | |
685 | const char *tls_get_addr; | |
5af6f000 L |
686 | const char *relative_r_name; |
687 | void (*elf_append_reloc) (bfd *, asection *, Elf_Internal_Rela *); | |
688 | void (*elf_write_addend) (bfd *, uint64_t, void *); | |
689 | void (*elf_write_addend_in_got) (bfd *, uint64_t, void *); | |
5b9c07b2 L |
690 | |
691 | /* Options passed from the linker. */ | |
692 | struct elf_linker_x86_params *params; | |
0afcef53 L |
693 | }; |
694 | ||
1de031c8 | 695 | struct elf_x86_init_table |
a6798bab L |
696 | { |
697 | /* The lazy PLT layout. */ | |
698 | const struct elf_x86_lazy_plt_layout *lazy_plt; | |
699 | ||
700 | /* The non-lazy PLT layout. */ | |
701 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
702 | ||
703 | /* The lazy PLT layout for IBT. */ | |
704 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
705 | ||
706 | /* The non-lazy PLT layout for IBT. */ | |
707 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
708 | ||
cf0e0a0b IB |
709 | /* The .sframe helper object for lazy .plt section. |
710 | This is used for x86-64 only. */ | |
711 | const struct elf_x86_sframe_plt *sframe_lazy_plt; | |
712 | ||
713 | /* The .sframe helper object for non-lazy .plt section. | |
714 | This is used for x86-64 only. */ | |
715 | const struct elf_x86_sframe_plt *sframe_non_lazy_plt; | |
716 | ||
717 | /* The .sframe helper object for lazy IBT .plt section. | |
718 | This is used for x86-64 only. */ | |
719 | const struct elf_x86_sframe_plt *sframe_lazy_ibt_plt; | |
720 | ||
721 | /* The .sframe helper object for non-lazy IBT .plt section. | |
722 | This is used for x86-64 only. */ | |
723 | const struct elf_x86_sframe_plt *sframe_non_lazy_ibt_plt; | |
724 | ||
851b6fa1 | 725 | bfd_byte plt0_pad_byte; |
7a382c1c L |
726 | |
727 | bfd_vma (*r_info) (bfd_vma, bfd_vma); | |
728 | bfd_vma (*r_sym) (bfd_vma); | |
a6798bab L |
729 | }; |
730 | ||
0afcef53 L |
731 | struct elf_x86_obj_tdata |
732 | { | |
733 | struct elf_obj_tdata root; | |
734 | ||
735 | /* tls_type for each local got entry. */ | |
736 | char *local_got_tls_type; | |
737 | ||
738 | /* GOTPLT entries for TLS descriptors. */ | |
739 | bfd_vma *local_tlsdesc_gotent; | |
5af6f000 L |
740 | |
741 | /* R_*_RELATIVE relocation in GOT for this local symbol has been | |
742 | processed. */ | |
743 | char *relative_reloc_done; | |
0afcef53 L |
744 | }; |
745 | ||
f493882d L |
746 | enum elf_x86_plt_type |
747 | { | |
748 | plt_non_lazy = 0, | |
749 | plt_lazy = 1 << 0, | |
750 | plt_pic = 1 << 1, | |
751 | plt_second = 1 << 2, | |
752 | plt_unknown = -1 | |
753 | }; | |
754 | ||
755 | struct elf_x86_plt | |
756 | { | |
757 | const char *name; | |
758 | asection *sec; | |
759 | bfd_byte *contents; | |
760 | enum elf_x86_plt_type type; | |
761 | unsigned int plt_got_offset; | |
762 | unsigned int plt_entry_size; | |
763 | unsigned int plt_got_insn_size; /* Only used for x86-64. */ | |
764 | long count; | |
765 | }; | |
766 | ||
382aae06 L |
767 | /* Set if a relocation is converted from a GOTPCREL relocation. */ |
768 | #define R_X86_64_converted_reloc_bit (1 << 7) | |
769 | ||
0afcef53 L |
770 | #define elf_x86_tdata(abfd) \ |
771 | ((struct elf_x86_obj_tdata *) (abfd)->tdata.any) | |
772 | ||
773 | #define elf_x86_local_got_tls_type(abfd) \ | |
774 | (elf_x86_tdata (abfd)->local_got_tls_type) | |
775 | ||
776 | #define elf_x86_local_tlsdesc_gotent(abfd) \ | |
777 | (elf_x86_tdata (abfd)->local_tlsdesc_gotent) | |
778 | ||
5af6f000 L |
779 | #define elf_x86_relative_reloc_done(abfd) \ |
780 | (elf_x86_tdata (abfd)->relative_reloc_done) | |
781 | ||
9ff114ca L |
782 | #define elf_x86_compute_jump_table_size(htab) \ |
783 | ((htab)->elf.srelplt->reloc_count * (htab)->got_entry_size) | |
784 | ||
fe53b4a4 L |
785 | #define is_x86_elf(bfd, htab) \ |
786 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
787 | && elf_tdata (bfd) != NULL \ | |
add5f777 | 788 | && elf_object_id (bfd) == (htab)->elf.hash_table_id) |
fe53b4a4 | 789 | |
a321de3f L |
790 | /* Rename some of the generic section flags to better document how they |
791 | are used here. */ | |
792 | #define check_relocs_failed sec_flg0 | |
5af6f000 | 793 | #define relative_reloc_packed sec_flg1 |
a321de3f | 794 | |
0a1b45a2 | 795 | extern bool _bfd_x86_elf_mkobject |
39946cc2 L |
796 | (bfd *); |
797 | ||
0afcef53 L |
798 | extern void _bfd_x86_elf_set_tls_module_base |
799 | (struct bfd_link_info *); | |
800 | ||
801 | extern bfd_vma _bfd_x86_elf_dtpoff_base | |
802 | (struct bfd_link_info *); | |
803 | ||
0a1b45a2 | 804 | extern bool _bfd_x86_elf_readonly_dynrelocs |
0afcef53 L |
805 | (struct elf_link_hash_entry *, void *); |
806 | ||
807 | extern struct elf_link_hash_entry * _bfd_elf_x86_get_local_sym_hash | |
808 | (struct elf_x86_link_hash_table *, bfd *, const Elf_Internal_Rela *, | |
0a1b45a2 | 809 | bool); |
0afcef53 L |
810 | |
811 | extern hashval_t _bfd_x86_elf_local_htab_hash | |
812 | (const void *); | |
813 | ||
814 | extern int _bfd_x86_elf_local_htab_eq | |
815 | (const void *, const void *); | |
816 | ||
817 | extern struct bfd_hash_entry * _bfd_x86_elf_link_hash_newfunc | |
818 | (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); | |
819 | ||
765e526c | 820 | extern struct bfd_link_hash_table * _bfd_x86_elf_link_hash_table_create |
0afcef53 L |
821 | (bfd *); |
822 | ||
823 | extern int _bfd_x86_elf_compare_relocs | |
824 | (const void *, const void *); | |
825 | ||
0a1b45a2 | 826 | extern bool _bfd_x86_elf_link_check_relocs |
0afcef53 L |
827 | (bfd *, struct bfd_link_info *); |
828 | ||
3747999c L |
829 | extern bool _bfd_x86_elf_check_relocs |
830 | (bfd *, struct bfd_link_info *, asection *, | |
831 | const Elf_Internal_Rela *); | |
832 | ||
5af6f000 L |
833 | extern bool _bfd_x86_elf_link_relax_section |
834 | (bfd *, asection *, struct bfd_link_info *, bool *); | |
835 | ||
836 | extern bool _bfd_elf_x86_size_relative_relocs | |
837 | (struct bfd_link_info *, bool *); | |
838 | ||
839 | extern bool _bfd_elf_x86_finish_relative_relocs | |
840 | (struct bfd_link_info *); | |
841 | ||
842 | extern void _bfd_elf32_write_addend (bfd *, uint64_t, void *); | |
843 | extern void _bfd_elf64_write_addend (bfd *, uint64_t, void *); | |
844 | ||
0a1b45a2 | 845 | extern bool _bfd_elf_x86_valid_reloc_p |
382aae06 L |
846 | (asection *, struct bfd_link_info *, struct elf_x86_link_hash_table *, |
847 | const Elf_Internal_Rela *, struct elf_link_hash_entry *, | |
0a1b45a2 | 848 | Elf_Internal_Sym *, Elf_Internal_Shdr *, bool *); |
382aae06 | 849 | |
0a1b45a2 | 850 | extern bool _bfd_x86_elf_size_dynamic_sections |
5e2ac45d L |
851 | (bfd *, struct bfd_link_info *); |
852 | ||
9577f60b L |
853 | extern struct elf_x86_link_hash_table *_bfd_x86_elf_finish_dynamic_sections |
854 | (bfd *, struct bfd_link_info *); | |
855 | ||
0a1b45a2 | 856 | extern bool _bfd_x86_elf_always_size_sections |
0afcef53 L |
857 | (bfd *, struct bfd_link_info *); |
858 | ||
859 | extern void _bfd_x86_elf_merge_symbol_attribute | |
0a1b45a2 | 860 | (struct elf_link_hash_entry *, unsigned int, bool, bool); |
0afcef53 L |
861 | |
862 | extern void _bfd_x86_elf_copy_indirect_symbol | |
863 | (struct bfd_link_info *, struct elf_link_hash_entry *, | |
864 | struct elf_link_hash_entry *); | |
865 | ||
0a1b45a2 | 866 | extern bool _bfd_x86_elf_fixup_symbol |
0afcef53 L |
867 | (struct bfd_link_info *, struct elf_link_hash_entry *); |
868 | ||
0a1b45a2 | 869 | extern bool _bfd_x86_elf_hash_symbol |
0afcef53 L |
870 | (struct elf_link_hash_entry *); |
871 | ||
0a1b45a2 | 872 | extern bool _bfd_x86_elf_adjust_dynamic_symbol |
eeb2f20a L |
873 | (struct bfd_link_info *, struct elf_link_hash_entry *); |
874 | ||
9f857535 | 875 | extern void _bfd_x86_elf_hide_symbol |
0a1b45a2 | 876 | (struct bfd_link_info *, struct elf_link_hash_entry *, bool); |
9f857535 | 877 | |
0a1b45a2 | 878 | extern bool _bfd_x86_elf_link_symbol_references_local |
6999821f L |
879 | (struct bfd_link_info *, struct elf_link_hash_entry *); |
880 | ||
4f501a24 L |
881 | extern asection * _bfd_x86_elf_gc_mark_hook |
882 | (asection *, struct bfd_link_info *, Elf_Internal_Rela *, | |
883 | struct elf_link_hash_entry *, Elf_Internal_Sym *); | |
884 | ||
f493882d L |
885 | extern long _bfd_x86_elf_get_synthetic_symtab |
886 | (bfd *, long, long, bfd_vma, struct elf_x86_plt [], asymbol **, | |
887 | asymbol **); | |
888 | ||
0afcef53 L |
889 | extern enum elf_property_kind _bfd_x86_elf_parse_gnu_properties |
890 | (bfd *, unsigned int, bfd_byte *, unsigned int); | |
891 | ||
0a1b45a2 | 892 | extern bool _bfd_x86_elf_merge_gnu_properties |
4e539114 | 893 | (struct bfd_link_info *, bfd *, bfd *, elf_property *, elf_property *); |
0afcef53 | 894 | |
bfb1e8c1 L |
895 | extern void _bfd_x86_elf_link_fixup_gnu_properties |
896 | (struct bfd_link_info *, elf_property_list **); | |
897 | ||
a6798bab | 898 | extern bfd * _bfd_x86_elf_link_setup_gnu_properties |
1de031c8 | 899 | (struct bfd_link_info *, struct elf_x86_init_table *); |
a6798bab | 900 | |
4ec09950 L |
901 | extern void _bfd_x86_elf_link_fixup_ifunc_symbol |
902 | (struct bfd_link_info *, struct elf_x86_link_hash_table *, | |
903 | struct elf_link_hash_entry *, Elf_Internal_Sym *sym); | |
904 | ||
68b00778 L |
905 | extern void _bfd_x86_elf_link_report_relative_reloc |
906 | (struct bfd_link_info *, asection *, struct elf_link_hash_entry *, | |
907 | Elf_Internal_Sym *, const char *, const void *); | |
908 | ||
39946cc2 L |
909 | #define bfd_elf64_mkobject \ |
910 | _bfd_x86_elf_mkobject | |
911 | #define bfd_elf32_mkobject \ | |
912 | _bfd_x86_elf_mkobject | |
765e526c L |
913 | #define bfd_elf64_bfd_link_hash_table_create \ |
914 | _bfd_x86_elf_link_hash_table_create | |
915 | #define bfd_elf32_bfd_link_hash_table_create \ | |
916 | _bfd_x86_elf_link_hash_table_create | |
0afcef53 L |
917 | #define bfd_elf64_bfd_link_check_relocs \ |
918 | _bfd_x86_elf_link_check_relocs | |
919 | #define bfd_elf32_bfd_link_check_relocs \ | |
920 | _bfd_x86_elf_link_check_relocs | |
5af6f000 L |
921 | #define bfd_elf32_bfd_relax_section \ |
922 | _bfd_x86_elf_link_relax_section | |
923 | #define bfd_elf64_bfd_relax_section \ | |
924 | _bfd_x86_elf_link_relax_section | |
0afcef53 | 925 | |
3747999c L |
926 | #define elf_backend_check_relocs \ |
927 | _bfd_x86_elf_check_relocs | |
5e2ac45d L |
928 | #define elf_backend_size_dynamic_sections \ |
929 | _bfd_x86_elf_size_dynamic_sections | |
0afcef53 L |
930 | #define elf_backend_merge_symbol_attribute \ |
931 | _bfd_x86_elf_merge_symbol_attribute | |
932 | #define elf_backend_copy_indirect_symbol \ | |
933 | _bfd_x86_elf_copy_indirect_symbol | |
934 | #define elf_backend_fixup_symbol \ | |
935 | _bfd_x86_elf_fixup_symbol | |
936 | #define elf_backend_hash_symbol \ | |
937 | _bfd_x86_elf_hash_symbol | |
eeb2f20a L |
938 | #define elf_backend_adjust_dynamic_symbol \ |
939 | _bfd_x86_elf_adjust_dynamic_symbol | |
4f501a24 L |
940 | #define elf_backend_gc_mark_hook \ |
941 | _bfd_x86_elf_gc_mark_hook | |
0afcef53 | 942 | #define elf_backend_omit_section_dynsym \ |
d00dd7dc | 943 | _bfd_elf_omit_section_dynsym_all |
0afcef53 L |
944 | #define elf_backend_parse_gnu_properties \ |
945 | _bfd_x86_elf_parse_gnu_properties | |
946 | #define elf_backend_merge_gnu_properties \ | |
947 | _bfd_x86_elf_merge_gnu_properties | |
bfb1e8c1 L |
948 | #define elf_backend_fixup_gnu_properties \ |
949 | _bfd_x86_elf_link_fixup_gnu_properties | |
5af6f000 L |
950 | #define elf_backend_size_relative_relocs \ |
951 | _bfd_elf_x86_size_relative_relocs | |
952 | #define elf_backend_finish_relative_relocs \ | |
953 | _bfd_elf_x86_finish_relative_relocs | |
794f2bba | 954 | |
74e315db L |
955 | #define ELF_P_ALIGN ELF_MINPAGESIZE |
956 | ||
bbdeb108 L |
957 | /* Allocate x86 GOT info for local symbols. */ |
958 | ||
959 | static inline bool | |
960 | elf_x86_allocate_local_got_info (bfd *abfd, bfd_size_type count) | |
961 | { | |
962 | bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); | |
963 | if (local_got_refcounts == NULL) | |
964 | { | |
965 | bfd_size_type size = count * (sizeof (bfd_signed_vma) | |
5af6f000 L |
966 | + sizeof (bfd_vma) |
967 | + 2 * sizeof(char)); | |
bbdeb108 L |
968 | local_got_refcounts = (bfd_signed_vma *) bfd_zalloc (abfd, size); |
969 | if (local_got_refcounts == NULL) | |
970 | return false; | |
971 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
972 | elf_x86_local_tlsdesc_gotent (abfd) = | |
973 | (bfd_vma *) (local_got_refcounts + count); | |
974 | elf_x86_local_got_tls_type (abfd) = | |
975 | (char *) (local_got_refcounts + 2 * count); | |
5af6f000 L |
976 | elf_x86_relative_reloc_done (abfd) = |
977 | ((char *) (local_got_refcounts + 2 * count)) + count; | |
bbdeb108 L |
978 | } |
979 | return true; | |
980 | } |