Commit | Line | Data |
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252b5132 | 1 | /* ELF linking support for BFD. |
2571583a | 2 | Copyright (C) 1995-2017 Free Software Foundation, Inc. |
252b5132 | 3 | |
8fdd7217 | 4 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 5 | |
8fdd7217 NC |
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 | |
cd123cb7 | 8 | the Free Software Foundation; either version 3 of the License, or |
8fdd7217 | 9 | (at your option) any later version. |
252b5132 | 10 | |
8fdd7217 NC |
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. | |
252b5132 | 15 | |
8fdd7217 NC |
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 | |
cd123cb7 NC |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
252b5132 | 20 | |
252b5132 | 21 | #include "sysdep.h" |
3db64b00 | 22 | #include "bfd.h" |
53df40a4 | 23 | #include "bfd_stdint.h" |
252b5132 RH |
24 | #include "bfdlink.h" |
25 | #include "libbfd.h" | |
26 | #define ARCH_SIZE 0 | |
27 | #include "elf-bfd.h" | |
4ad4eba5 | 28 | #include "safe-ctype.h" |
ccf2f652 | 29 | #include "libiberty.h" |
66eb6687 | 30 | #include "objalloc.h" |
08ce1d72 | 31 | #if BFD_SUPPORTS_PLUGINS |
7d0b9ebc | 32 | #include "plugin-api.h" |
7dc3990e L |
33 | #include "plugin.h" |
34 | #endif | |
252b5132 | 35 | |
28caa186 AM |
36 | /* This struct is used to pass information to routines called via |
37 | elf_link_hash_traverse which must return failure. */ | |
38 | ||
39 | struct elf_info_failed | |
40 | { | |
41 | struct bfd_link_info *info; | |
28caa186 AM |
42 | bfd_boolean failed; |
43 | }; | |
44 | ||
45 | /* This structure is used to pass information to | |
46 | _bfd_elf_link_find_version_dependencies. */ | |
47 | ||
48 | struct elf_find_verdep_info | |
49 | { | |
50 | /* General link information. */ | |
51 | struct bfd_link_info *info; | |
52 | /* The number of dependencies. */ | |
53 | unsigned int vers; | |
54 | /* Whether we had a failure. */ | |
55 | bfd_boolean failed; | |
56 | }; | |
57 | ||
58 | static bfd_boolean _bfd_elf_fix_symbol_flags | |
59 | (struct elf_link_hash_entry *, struct elf_info_failed *); | |
60 | ||
2f0c68f2 CM |
61 | asection * |
62 | _bfd_elf_section_for_symbol (struct elf_reloc_cookie *cookie, | |
63 | unsigned long r_symndx, | |
64 | bfd_boolean discard) | |
65 | { | |
66 | if (r_symndx >= cookie->locsymcount | |
67 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
68 | { | |
69 | struct elf_link_hash_entry *h; | |
70 | ||
71 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; | |
72 | ||
73 | while (h->root.type == bfd_link_hash_indirect | |
74 | || h->root.type == bfd_link_hash_warning) | |
75 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
76 | ||
77 | if ((h->root.type == bfd_link_hash_defined | |
78 | || h->root.type == bfd_link_hash_defweak) | |
79 | && discarded_section (h->root.u.def.section)) | |
80 | return h->root.u.def.section; | |
81 | else | |
82 | return NULL; | |
83 | } | |
84 | else | |
85 | { | |
86 | /* It's not a relocation against a global symbol, | |
87 | but it could be a relocation against a local | |
88 | symbol for a discarded section. */ | |
89 | asection *isec; | |
90 | Elf_Internal_Sym *isym; | |
91 | ||
92 | /* Need to: get the symbol; get the section. */ | |
93 | isym = &cookie->locsyms[r_symndx]; | |
94 | isec = bfd_section_from_elf_index (cookie->abfd, isym->st_shndx); | |
95 | if (isec != NULL | |
96 | && discard ? discarded_section (isec) : 1) | |
97 | return isec; | |
98 | } | |
99 | return NULL; | |
100 | } | |
101 | ||
d98685ac AM |
102 | /* Define a symbol in a dynamic linkage section. */ |
103 | ||
104 | struct elf_link_hash_entry * | |
105 | _bfd_elf_define_linkage_sym (bfd *abfd, | |
106 | struct bfd_link_info *info, | |
107 | asection *sec, | |
108 | const char *name) | |
109 | { | |
110 | struct elf_link_hash_entry *h; | |
111 | struct bfd_link_hash_entry *bh; | |
ccabcbe5 | 112 | const struct elf_backend_data *bed; |
d98685ac AM |
113 | |
114 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, FALSE); | |
115 | if (h != NULL) | |
116 | { | |
117 | /* Zap symbol defined in an as-needed lib that wasn't linked. | |
118 | This is a symptom of a larger problem: Absolute symbols | |
119 | defined in shared libraries can't be overridden, because we | |
120 | lose the link to the bfd which is via the symbol section. */ | |
121 | h->root.type = bfd_link_hash_new; | |
122 | } | |
123 | ||
124 | bh = &h->root; | |
cf18fda4 | 125 | bed = get_elf_backend_data (abfd); |
d98685ac | 126 | if (!_bfd_generic_link_add_one_symbol (info, abfd, name, BSF_GLOBAL, |
cf18fda4 | 127 | sec, 0, NULL, FALSE, bed->collect, |
d98685ac AM |
128 | &bh)) |
129 | return NULL; | |
130 | h = (struct elf_link_hash_entry *) bh; | |
131 | h->def_regular = 1; | |
e28df02b | 132 | h->non_elf = 0; |
12b2843a | 133 | h->root.linker_def = 1; |
d98685ac | 134 | h->type = STT_OBJECT; |
00b7642b AM |
135 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
136 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
d98685ac | 137 | |
ccabcbe5 | 138 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
d98685ac AM |
139 | return h; |
140 | } | |
141 | ||
b34976b6 | 142 | bfd_boolean |
268b6b39 | 143 | _bfd_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
252b5132 RH |
144 | { |
145 | flagword flags; | |
aad5d350 | 146 | asection *s; |
252b5132 | 147 | struct elf_link_hash_entry *h; |
9c5bfbb7 | 148 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 149 | struct elf_link_hash_table *htab = elf_hash_table (info); |
252b5132 RH |
150 | |
151 | /* This function may be called more than once. */ | |
ce558b89 | 152 | if (htab->sgot != NULL) |
b34976b6 | 153 | return TRUE; |
252b5132 | 154 | |
e5a52504 | 155 | flags = bed->dynamic_sec_flags; |
252b5132 | 156 | |
14b2f831 AM |
157 | s = bfd_make_section_anyway_with_flags (abfd, |
158 | (bed->rela_plts_and_copies_p | |
159 | ? ".rela.got" : ".rel.got"), | |
160 | (bed->dynamic_sec_flags | |
161 | | SEC_READONLY)); | |
6de2ae4a L |
162 | if (s == NULL |
163 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
164 | return FALSE; | |
165 | htab->srelgot = s; | |
252b5132 | 166 | |
14b2f831 | 167 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
64e77c6d L |
168 | if (s == NULL |
169 | || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
170 | return FALSE; | |
171 | htab->sgot = s; | |
172 | ||
252b5132 RH |
173 | if (bed->want_got_plt) |
174 | { | |
14b2f831 | 175 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
252b5132 | 176 | if (s == NULL |
6de2ae4a L |
177 | || !bfd_set_section_alignment (abfd, s, |
178 | bed->s->log_file_align)) | |
b34976b6 | 179 | return FALSE; |
6de2ae4a | 180 | htab->sgotplt = s; |
252b5132 RH |
181 | } |
182 | ||
64e77c6d L |
183 | /* The first bit of the global offset table is the header. */ |
184 | s->size += bed->got_header_size; | |
185 | ||
2517a57f AM |
186 | if (bed->want_got_sym) |
187 | { | |
188 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
189 | (or .got.plt) section. We don't do this in the linker script | |
190 | because we don't want to define the symbol if we are not creating | |
191 | a global offset table. */ | |
6de2ae4a L |
192 | h = _bfd_elf_define_linkage_sym (abfd, info, s, |
193 | "_GLOBAL_OFFSET_TABLE_"); | |
2517a57f | 194 | elf_hash_table (info)->hgot = h; |
d98685ac AM |
195 | if (h == NULL) |
196 | return FALSE; | |
2517a57f | 197 | } |
252b5132 | 198 | |
b34976b6 | 199 | return TRUE; |
252b5132 RH |
200 | } |
201 | \f | |
7e9f0867 AM |
202 | /* Create a strtab to hold the dynamic symbol names. */ |
203 | static bfd_boolean | |
204 | _bfd_elf_link_create_dynstrtab (bfd *abfd, struct bfd_link_info *info) | |
205 | { | |
206 | struct elf_link_hash_table *hash_table; | |
207 | ||
208 | hash_table = elf_hash_table (info); | |
209 | if (hash_table->dynobj == NULL) | |
6cd255ca L |
210 | { |
211 | /* We may not set dynobj, an input file holding linker created | |
212 | dynamic sections to abfd, which may be a dynamic object with | |
213 | its own dynamic sections. We need to find a normal input file | |
214 | to hold linker created sections if possible. */ | |
215 | if ((abfd->flags & (DYNAMIC | BFD_PLUGIN)) != 0) | |
216 | { | |
217 | bfd *ibfd; | |
218 | for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) | |
6645479e L |
219 | if ((ibfd->flags |
220 | & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0) | |
6cd255ca L |
221 | { |
222 | abfd = ibfd; | |
223 | break; | |
224 | } | |
225 | } | |
226 | hash_table->dynobj = abfd; | |
227 | } | |
7e9f0867 AM |
228 | |
229 | if (hash_table->dynstr == NULL) | |
230 | { | |
231 | hash_table->dynstr = _bfd_elf_strtab_init (); | |
232 | if (hash_table->dynstr == NULL) | |
233 | return FALSE; | |
234 | } | |
235 | return TRUE; | |
236 | } | |
237 | ||
45d6a902 AM |
238 | /* Create some sections which will be filled in with dynamic linking |
239 | information. ABFD is an input file which requires dynamic sections | |
240 | to be created. The dynamic sections take up virtual memory space | |
241 | when the final executable is run, so we need to create them before | |
242 | addresses are assigned to the output sections. We work out the | |
243 | actual contents and size of these sections later. */ | |
252b5132 | 244 | |
b34976b6 | 245 | bfd_boolean |
268b6b39 | 246 | _bfd_elf_link_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 247 | { |
45d6a902 | 248 | flagword flags; |
91d6fa6a | 249 | asection *s; |
9c5bfbb7 | 250 | const struct elf_backend_data *bed; |
9637f6ef | 251 | struct elf_link_hash_entry *h; |
252b5132 | 252 | |
0eddce27 | 253 | if (! is_elf_hash_table (info->hash)) |
45d6a902 AM |
254 | return FALSE; |
255 | ||
256 | if (elf_hash_table (info)->dynamic_sections_created) | |
257 | return TRUE; | |
258 | ||
7e9f0867 AM |
259 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
260 | return FALSE; | |
45d6a902 | 261 | |
7e9f0867 | 262 | abfd = elf_hash_table (info)->dynobj; |
e5a52504 MM |
263 | bed = get_elf_backend_data (abfd); |
264 | ||
265 | flags = bed->dynamic_sec_flags; | |
45d6a902 AM |
266 | |
267 | /* A dynamically linked executable has a .interp section, but a | |
268 | shared library does not. */ | |
9b8b325a | 269 | if (bfd_link_executable (info) && !info->nointerp) |
252b5132 | 270 | { |
14b2f831 AM |
271 | s = bfd_make_section_anyway_with_flags (abfd, ".interp", |
272 | flags | SEC_READONLY); | |
3496cb2a | 273 | if (s == NULL) |
45d6a902 AM |
274 | return FALSE; |
275 | } | |
bb0deeff | 276 | |
45d6a902 AM |
277 | /* Create sections to hold version informations. These are removed |
278 | if they are not needed. */ | |
14b2f831 AM |
279 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_d", |
280 | flags | SEC_READONLY); | |
45d6a902 | 281 | if (s == NULL |
45d6a902 AM |
282 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
283 | return FALSE; | |
284 | ||
14b2f831 AM |
285 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version", |
286 | flags | SEC_READONLY); | |
45d6a902 | 287 | if (s == NULL |
45d6a902 AM |
288 | || ! bfd_set_section_alignment (abfd, s, 1)) |
289 | return FALSE; | |
290 | ||
14b2f831 AM |
291 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_r", |
292 | flags | SEC_READONLY); | |
45d6a902 | 293 | if (s == NULL |
45d6a902 AM |
294 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
295 | return FALSE; | |
296 | ||
14b2f831 AM |
297 | s = bfd_make_section_anyway_with_flags (abfd, ".dynsym", |
298 | flags | SEC_READONLY); | |
45d6a902 | 299 | if (s == NULL |
45d6a902 AM |
300 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
301 | return FALSE; | |
cae1fbbb | 302 | elf_hash_table (info)->dynsym = s; |
45d6a902 | 303 | |
14b2f831 AM |
304 | s = bfd_make_section_anyway_with_flags (abfd, ".dynstr", |
305 | flags | SEC_READONLY); | |
3496cb2a | 306 | if (s == NULL) |
45d6a902 AM |
307 | return FALSE; |
308 | ||
14b2f831 | 309 | s = bfd_make_section_anyway_with_flags (abfd, ".dynamic", flags); |
45d6a902 | 310 | if (s == NULL |
45d6a902 AM |
311 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
312 | return FALSE; | |
313 | ||
314 | /* The special symbol _DYNAMIC is always set to the start of the | |
77cfaee6 AM |
315 | .dynamic section. We could set _DYNAMIC in a linker script, but we |
316 | only want to define it if we are, in fact, creating a .dynamic | |
317 | section. We don't want to define it if there is no .dynamic | |
318 | section, since on some ELF platforms the start up code examines it | |
319 | to decide how to initialize the process. */ | |
9637f6ef L |
320 | h = _bfd_elf_define_linkage_sym (abfd, info, s, "_DYNAMIC"); |
321 | elf_hash_table (info)->hdynamic = h; | |
322 | if (h == NULL) | |
45d6a902 AM |
323 | return FALSE; |
324 | ||
fdc90cb4 JJ |
325 | if (info->emit_hash) |
326 | { | |
14b2f831 AM |
327 | s = bfd_make_section_anyway_with_flags (abfd, ".hash", |
328 | flags | SEC_READONLY); | |
fdc90cb4 JJ |
329 | if (s == NULL |
330 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
331 | return FALSE; | |
332 | elf_section_data (s)->this_hdr.sh_entsize = bed->s->sizeof_hash_entry; | |
333 | } | |
334 | ||
335 | if (info->emit_gnu_hash) | |
336 | { | |
14b2f831 AM |
337 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.hash", |
338 | flags | SEC_READONLY); | |
fdc90cb4 JJ |
339 | if (s == NULL |
340 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
341 | return FALSE; | |
342 | /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section: | |
343 | 4 32-bit words followed by variable count of 64-bit words, then | |
344 | variable count of 32-bit words. */ | |
345 | if (bed->s->arch_size == 64) | |
346 | elf_section_data (s)->this_hdr.sh_entsize = 0; | |
347 | else | |
348 | elf_section_data (s)->this_hdr.sh_entsize = 4; | |
349 | } | |
45d6a902 AM |
350 | |
351 | /* Let the backend create the rest of the sections. This lets the | |
352 | backend set the right flags. The backend will normally create | |
353 | the .got and .plt sections. */ | |
894891db NC |
354 | if (bed->elf_backend_create_dynamic_sections == NULL |
355 | || ! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) | |
45d6a902 AM |
356 | return FALSE; |
357 | ||
358 | elf_hash_table (info)->dynamic_sections_created = TRUE; | |
359 | ||
360 | return TRUE; | |
361 | } | |
362 | ||
363 | /* Create dynamic sections when linking against a dynamic object. */ | |
364 | ||
365 | bfd_boolean | |
268b6b39 | 366 | _bfd_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
45d6a902 AM |
367 | { |
368 | flagword flags, pltflags; | |
7325306f | 369 | struct elf_link_hash_entry *h; |
45d6a902 | 370 | asection *s; |
9c5bfbb7 | 371 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 372 | struct elf_link_hash_table *htab = elf_hash_table (info); |
45d6a902 | 373 | |
252b5132 RH |
374 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
375 | .rel[a].bss sections. */ | |
e5a52504 | 376 | flags = bed->dynamic_sec_flags; |
252b5132 RH |
377 | |
378 | pltflags = flags; | |
252b5132 | 379 | if (bed->plt_not_loaded) |
6df4d94c MM |
380 | /* We do not clear SEC_ALLOC here because we still want the OS to |
381 | allocate space for the section; it's just that there's nothing | |
382 | to read in from the object file. */ | |
5d1634d7 | 383 | pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS); |
6df4d94c MM |
384 | else |
385 | pltflags |= SEC_ALLOC | SEC_CODE | SEC_LOAD; | |
252b5132 RH |
386 | if (bed->plt_readonly) |
387 | pltflags |= SEC_READONLY; | |
388 | ||
14b2f831 | 389 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); |
252b5132 | 390 | if (s == NULL |
252b5132 | 391 | || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) |
b34976b6 | 392 | return FALSE; |
6de2ae4a | 393 | htab->splt = s; |
252b5132 | 394 | |
d98685ac AM |
395 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
396 | .plt section. */ | |
7325306f RS |
397 | if (bed->want_plt_sym) |
398 | { | |
399 | h = _bfd_elf_define_linkage_sym (abfd, info, s, | |
400 | "_PROCEDURE_LINKAGE_TABLE_"); | |
401 | elf_hash_table (info)->hplt = h; | |
402 | if (h == NULL) | |
403 | return FALSE; | |
404 | } | |
252b5132 | 405 | |
14b2f831 AM |
406 | s = bfd_make_section_anyway_with_flags (abfd, |
407 | (bed->rela_plts_and_copies_p | |
408 | ? ".rela.plt" : ".rel.plt"), | |
409 | flags | SEC_READONLY); | |
252b5132 | 410 | if (s == NULL |
45d6a902 | 411 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
b34976b6 | 412 | return FALSE; |
6de2ae4a | 413 | htab->srelplt = s; |
252b5132 RH |
414 | |
415 | if (! _bfd_elf_create_got_section (abfd, info)) | |
b34976b6 | 416 | return FALSE; |
252b5132 | 417 | |
3018b441 RH |
418 | if (bed->want_dynbss) |
419 | { | |
420 | /* The .dynbss section is a place to put symbols which are defined | |
421 | by dynamic objects, are referenced by regular objects, and are | |
422 | not functions. We must allocate space for them in the process | |
423 | image and use a R_*_COPY reloc to tell the dynamic linker to | |
424 | initialize them at run time. The linker script puts the .dynbss | |
425 | section into the .bss section of the final image. */ | |
14b2f831 AM |
426 | s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", |
427 | (SEC_ALLOC | SEC_LINKER_CREATED)); | |
3496cb2a | 428 | if (s == NULL) |
b34976b6 | 429 | return FALSE; |
9d19e4fd | 430 | htab->sdynbss = s; |
252b5132 | 431 | |
5474d94f AM |
432 | if (bed->want_dynrelro) |
433 | { | |
434 | /* Similarly, but for symbols that were originally in read-only | |
435 | sections. */ | |
436 | s = bfd_make_section_anyway_with_flags (abfd, ".data.rel.ro", | |
437 | (SEC_ALLOC | SEC_READONLY | |
438 | | SEC_HAS_CONTENTS | |
439 | | SEC_LINKER_CREATED)); | |
440 | if (s == NULL) | |
441 | return FALSE; | |
442 | htab->sdynrelro = s; | |
443 | } | |
444 | ||
3018b441 | 445 | /* The .rel[a].bss section holds copy relocs. This section is not |
77cfaee6 AM |
446 | normally needed. We need to create it here, though, so that the |
447 | linker will map it to an output section. We can't just create it | |
448 | only if we need it, because we will not know whether we need it | |
449 | until we have seen all the input files, and the first time the | |
450 | main linker code calls BFD after examining all the input files | |
451 | (size_dynamic_sections) the input sections have already been | |
452 | mapped to the output sections. If the section turns out not to | |
453 | be needed, we can discard it later. We will never need this | |
454 | section when generating a shared object, since they do not use | |
455 | copy relocs. */ | |
9d19e4fd | 456 | if (bfd_link_executable (info)) |
3018b441 | 457 | { |
14b2f831 AM |
458 | s = bfd_make_section_anyway_with_flags (abfd, |
459 | (bed->rela_plts_and_copies_p | |
460 | ? ".rela.bss" : ".rel.bss"), | |
461 | flags | SEC_READONLY); | |
3018b441 | 462 | if (s == NULL |
45d6a902 | 463 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
b34976b6 | 464 | return FALSE; |
9d19e4fd | 465 | htab->srelbss = s; |
5474d94f AM |
466 | |
467 | if (bed->want_dynrelro) | |
468 | { | |
469 | s = (bfd_make_section_anyway_with_flags | |
470 | (abfd, (bed->rela_plts_and_copies_p | |
471 | ? ".rela.data.rel.ro" : ".rel.data.rel.ro"), | |
472 | flags | SEC_READONLY)); | |
473 | if (s == NULL | |
474 | || ! bfd_set_section_alignment (abfd, s, | |
475 | bed->s->log_file_align)) | |
476 | return FALSE; | |
477 | htab->sreldynrelro = s; | |
478 | } | |
3018b441 | 479 | } |
252b5132 RH |
480 | } |
481 | ||
b34976b6 | 482 | return TRUE; |
252b5132 RH |
483 | } |
484 | \f | |
252b5132 RH |
485 | /* Record a new dynamic symbol. We record the dynamic symbols as we |
486 | read the input files, since we need to have a list of all of them | |
487 | before we can determine the final sizes of the output sections. | |
488 | Note that we may actually call this function even though we are not | |
489 | going to output any dynamic symbols; in some cases we know that a | |
490 | symbol should be in the dynamic symbol table, but only if there is | |
491 | one. */ | |
492 | ||
b34976b6 | 493 | bfd_boolean |
c152c796 AM |
494 | bfd_elf_link_record_dynamic_symbol (struct bfd_link_info *info, |
495 | struct elf_link_hash_entry *h) | |
252b5132 RH |
496 | { |
497 | if (h->dynindx == -1) | |
498 | { | |
2b0f7ef9 | 499 | struct elf_strtab_hash *dynstr; |
68b6ddd0 | 500 | char *p; |
252b5132 | 501 | const char *name; |
ef53be89 | 502 | size_t indx; |
252b5132 | 503 | |
7a13edea NC |
504 | /* XXX: The ABI draft says the linker must turn hidden and |
505 | internal symbols into STB_LOCAL symbols when producing the | |
506 | DSO. However, if ld.so honors st_other in the dynamic table, | |
507 | this would not be necessary. */ | |
508 | switch (ELF_ST_VISIBILITY (h->other)) | |
509 | { | |
510 | case STV_INTERNAL: | |
511 | case STV_HIDDEN: | |
9d6eee78 L |
512 | if (h->root.type != bfd_link_hash_undefined |
513 | && h->root.type != bfd_link_hash_undefweak) | |
38048eb9 | 514 | { |
f5385ebf | 515 | h->forced_local = 1; |
67687978 PB |
516 | if (!elf_hash_table (info)->is_relocatable_executable) |
517 | return TRUE; | |
7a13edea | 518 | } |
0444bdd4 | 519 | |
7a13edea NC |
520 | default: |
521 | break; | |
522 | } | |
523 | ||
252b5132 RH |
524 | h->dynindx = elf_hash_table (info)->dynsymcount; |
525 | ++elf_hash_table (info)->dynsymcount; | |
526 | ||
527 | dynstr = elf_hash_table (info)->dynstr; | |
528 | if (dynstr == NULL) | |
529 | { | |
530 | /* Create a strtab to hold the dynamic symbol names. */ | |
2b0f7ef9 | 531 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); |
252b5132 | 532 | if (dynstr == NULL) |
b34976b6 | 533 | return FALSE; |
252b5132 RH |
534 | } |
535 | ||
536 | /* We don't put any version information in the dynamic string | |
aad5d350 | 537 | table. */ |
252b5132 RH |
538 | name = h->root.root.string; |
539 | p = strchr (name, ELF_VER_CHR); | |
68b6ddd0 AM |
540 | if (p != NULL) |
541 | /* We know that the p points into writable memory. In fact, | |
542 | there are only a few symbols that have read-only names, being | |
543 | those like _GLOBAL_OFFSET_TABLE_ that are created specially | |
544 | by the backends. Most symbols will have names pointing into | |
545 | an ELF string table read from a file, or to objalloc memory. */ | |
546 | *p = 0; | |
547 | ||
548 | indx = _bfd_elf_strtab_add (dynstr, name, p != NULL); | |
549 | ||
550 | if (p != NULL) | |
551 | *p = ELF_VER_CHR; | |
252b5132 | 552 | |
ef53be89 | 553 | if (indx == (size_t) -1) |
b34976b6 | 554 | return FALSE; |
252b5132 RH |
555 | h->dynstr_index = indx; |
556 | } | |
557 | ||
b34976b6 | 558 | return TRUE; |
252b5132 | 559 | } |
45d6a902 | 560 | \f |
55255dae L |
561 | /* Mark a symbol dynamic. */ |
562 | ||
28caa186 | 563 | static void |
55255dae | 564 | bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info *info, |
40b36307 L |
565 | struct elf_link_hash_entry *h, |
566 | Elf_Internal_Sym *sym) | |
55255dae | 567 | { |
40b36307 | 568 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
55255dae | 569 | |
40b36307 | 570 | /* It may be called more than once on the same H. */ |
0e1862bb | 571 | if(h->dynamic || bfd_link_relocatable (info)) |
55255dae L |
572 | return; |
573 | ||
40b36307 L |
574 | if ((info->dynamic_data |
575 | && (h->type == STT_OBJECT | |
b8871f35 | 576 | || h->type == STT_COMMON |
40b36307 | 577 | || (sym != NULL |
b8871f35 L |
578 | && (ELF_ST_TYPE (sym->st_info) == STT_OBJECT |
579 | || ELF_ST_TYPE (sym->st_info) == STT_COMMON)))) | |
a0c8462f | 580 | || (d != NULL |
40b36307 L |
581 | && h->root.type == bfd_link_hash_new |
582 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
55255dae L |
583 | h->dynamic = 1; |
584 | } | |
585 | ||
45d6a902 AM |
586 | /* Record an assignment to a symbol made by a linker script. We need |
587 | this in case some dynamic object refers to this symbol. */ | |
588 | ||
589 | bfd_boolean | |
fe21a8fc L |
590 | bfd_elf_record_link_assignment (bfd *output_bfd, |
591 | struct bfd_link_info *info, | |
268b6b39 | 592 | const char *name, |
fe21a8fc L |
593 | bfd_boolean provide, |
594 | bfd_boolean hidden) | |
45d6a902 | 595 | { |
00cbee0a | 596 | struct elf_link_hash_entry *h, *hv; |
4ea42fb7 | 597 | struct elf_link_hash_table *htab; |
00cbee0a | 598 | const struct elf_backend_data *bed; |
45d6a902 | 599 | |
0eddce27 | 600 | if (!is_elf_hash_table (info->hash)) |
45d6a902 AM |
601 | return TRUE; |
602 | ||
4ea42fb7 AM |
603 | htab = elf_hash_table (info); |
604 | h = elf_link_hash_lookup (htab, name, !provide, TRUE, FALSE); | |
45d6a902 | 605 | if (h == NULL) |
4ea42fb7 | 606 | return provide; |
45d6a902 | 607 | |
8e2a4f11 AM |
608 | if (h->root.type == bfd_link_hash_warning) |
609 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
610 | ||
0f550b3d L |
611 | if (h->versioned == unknown) |
612 | { | |
613 | /* Set versioned if symbol version is unknown. */ | |
614 | char *version = strrchr (name, ELF_VER_CHR); | |
615 | if (version) | |
616 | { | |
617 | if (version > name && version[-1] != ELF_VER_CHR) | |
618 | h->versioned = versioned_hidden; | |
619 | else | |
620 | h->versioned = versioned; | |
621 | } | |
622 | } | |
623 | ||
00cbee0a | 624 | switch (h->root.type) |
77cfaee6 | 625 | { |
00cbee0a L |
626 | case bfd_link_hash_defined: |
627 | case bfd_link_hash_defweak: | |
628 | case bfd_link_hash_common: | |
629 | break; | |
630 | case bfd_link_hash_undefweak: | |
631 | case bfd_link_hash_undefined: | |
632 | /* Since we're defining the symbol, don't let it seem to have not | |
633 | been defined. record_dynamic_symbol and size_dynamic_sections | |
634 | may depend on this. */ | |
4ea42fb7 | 635 | h->root.type = bfd_link_hash_new; |
77cfaee6 AM |
636 | if (h->root.u.undef.next != NULL || htab->root.undefs_tail == &h->root) |
637 | bfd_link_repair_undef_list (&htab->root); | |
00cbee0a L |
638 | break; |
639 | case bfd_link_hash_new: | |
40b36307 | 640 | bfd_elf_link_mark_dynamic_symbol (info, h, NULL); |
55255dae | 641 | h->non_elf = 0; |
00cbee0a L |
642 | break; |
643 | case bfd_link_hash_indirect: | |
644 | /* We had a versioned symbol in a dynamic library. We make the | |
a0c8462f | 645 | the versioned symbol point to this one. */ |
00cbee0a L |
646 | bed = get_elf_backend_data (output_bfd); |
647 | hv = h; | |
648 | while (hv->root.type == bfd_link_hash_indirect | |
649 | || hv->root.type == bfd_link_hash_warning) | |
650 | hv = (struct elf_link_hash_entry *) hv->root.u.i.link; | |
651 | /* We don't need to update h->root.u since linker will set them | |
652 | later. */ | |
653 | h->root.type = bfd_link_hash_undefined; | |
654 | hv->root.type = bfd_link_hash_indirect; | |
655 | hv->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
656 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hv); | |
657 | break; | |
8e2a4f11 AM |
658 | default: |
659 | BFD_FAIL (); | |
c2596ca5 | 660 | return FALSE; |
55255dae | 661 | } |
45d6a902 AM |
662 | |
663 | /* If this symbol is being provided by the linker script, and it is | |
664 | currently defined by a dynamic object, but not by a regular | |
665 | object, then mark it as undefined so that the generic linker will | |
666 | force the correct value. */ | |
667 | if (provide | |
f5385ebf AM |
668 | && h->def_dynamic |
669 | && !h->def_regular) | |
45d6a902 AM |
670 | h->root.type = bfd_link_hash_undefined; |
671 | ||
672 | /* If this symbol is not being provided by the linker script, and it is | |
673 | currently defined by a dynamic object, but not by a regular object, | |
81ff47b3 MR |
674 | then undo any forced local marking that may have been set by input |
675 | section garbage collection and clear out any version information | |
676 | because the symbol will not be associated with the dynamic object | |
677 | any more. */ | |
45d6a902 | 678 | if (!provide |
f5385ebf AM |
679 | && h->def_dynamic |
680 | && !h->def_regular) | |
81ff47b3 MR |
681 | { |
682 | h->forced_local = 0; | |
683 | h->verinfo.verdef = NULL; | |
684 | } | |
45d6a902 | 685 | |
f5385ebf | 686 | h->def_regular = 1; |
45d6a902 | 687 | |
eb8476a6 | 688 | if (hidden) |
fe21a8fc | 689 | { |
91d6fa6a | 690 | bed = get_elf_backend_data (output_bfd); |
b8297068 AM |
691 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
692 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
fe21a8fc L |
693 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
694 | } | |
695 | ||
6fa3860b PB |
696 | /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects |
697 | and executables. */ | |
0e1862bb | 698 | if (!bfd_link_relocatable (info) |
6fa3860b PB |
699 | && h->dynindx != -1 |
700 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
701 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) | |
702 | h->forced_local = 1; | |
703 | ||
f5385ebf AM |
704 | if ((h->def_dynamic |
705 | || h->ref_dynamic | |
6b3b0ab8 L |
706 | || bfd_link_dll (info) |
707 | || elf_hash_table (info)->is_relocatable_executable) | |
45d6a902 AM |
708 | && h->dynindx == -1) |
709 | { | |
c152c796 | 710 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
45d6a902 AM |
711 | return FALSE; |
712 | ||
713 | /* If this is a weak defined symbol, and we know a corresponding | |
714 | real symbol from the same dynamic object, make sure the real | |
715 | symbol is also made into a dynamic symbol. */ | |
f6e332e6 AM |
716 | if (h->u.weakdef != NULL |
717 | && h->u.weakdef->dynindx == -1) | |
45d6a902 | 718 | { |
f6e332e6 | 719 | if (! bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef)) |
45d6a902 AM |
720 | return FALSE; |
721 | } | |
722 | } | |
723 | ||
724 | return TRUE; | |
725 | } | |
42751cf3 | 726 | |
8c58d23b AM |
727 | /* Record a new local dynamic symbol. Returns 0 on failure, 1 on |
728 | success, and 2 on a failure caused by attempting to record a symbol | |
729 | in a discarded section, eg. a discarded link-once section symbol. */ | |
730 | ||
731 | int | |
c152c796 AM |
732 | bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info *info, |
733 | bfd *input_bfd, | |
734 | long input_indx) | |
8c58d23b AM |
735 | { |
736 | bfd_size_type amt; | |
737 | struct elf_link_local_dynamic_entry *entry; | |
738 | struct elf_link_hash_table *eht; | |
739 | struct elf_strtab_hash *dynstr; | |
ef53be89 | 740 | size_t dynstr_index; |
8c58d23b AM |
741 | char *name; |
742 | Elf_External_Sym_Shndx eshndx; | |
743 | char esym[sizeof (Elf64_External_Sym)]; | |
744 | ||
0eddce27 | 745 | if (! is_elf_hash_table (info->hash)) |
8c58d23b AM |
746 | return 0; |
747 | ||
748 | /* See if the entry exists already. */ | |
749 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
750 | if (entry->input_bfd == input_bfd && entry->input_indx == input_indx) | |
751 | return 1; | |
752 | ||
753 | amt = sizeof (*entry); | |
a50b1753 | 754 | entry = (struct elf_link_local_dynamic_entry *) bfd_alloc (input_bfd, amt); |
8c58d23b AM |
755 | if (entry == NULL) |
756 | return 0; | |
757 | ||
758 | /* Go find the symbol, so that we can find it's name. */ | |
759 | if (!bfd_elf_get_elf_syms (input_bfd, &elf_tdata (input_bfd)->symtab_hdr, | |
268b6b39 | 760 | 1, input_indx, &entry->isym, esym, &eshndx)) |
8c58d23b AM |
761 | { |
762 | bfd_release (input_bfd, entry); | |
763 | return 0; | |
764 | } | |
765 | ||
766 | if (entry->isym.st_shndx != SHN_UNDEF | |
4fbb74a6 | 767 | && entry->isym.st_shndx < SHN_LORESERVE) |
8c58d23b AM |
768 | { |
769 | asection *s; | |
770 | ||
771 | s = bfd_section_from_elf_index (input_bfd, entry->isym.st_shndx); | |
772 | if (s == NULL || bfd_is_abs_section (s->output_section)) | |
773 | { | |
774 | /* We can still bfd_release here as nothing has done another | |
775 | bfd_alloc. We can't do this later in this function. */ | |
776 | bfd_release (input_bfd, entry); | |
777 | return 2; | |
778 | } | |
779 | } | |
780 | ||
781 | name = (bfd_elf_string_from_elf_section | |
782 | (input_bfd, elf_tdata (input_bfd)->symtab_hdr.sh_link, | |
783 | entry->isym.st_name)); | |
784 | ||
785 | dynstr = elf_hash_table (info)->dynstr; | |
786 | if (dynstr == NULL) | |
787 | { | |
788 | /* Create a strtab to hold the dynamic symbol names. */ | |
789 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); | |
790 | if (dynstr == NULL) | |
791 | return 0; | |
792 | } | |
793 | ||
b34976b6 | 794 | dynstr_index = _bfd_elf_strtab_add (dynstr, name, FALSE); |
ef53be89 | 795 | if (dynstr_index == (size_t) -1) |
8c58d23b AM |
796 | return 0; |
797 | entry->isym.st_name = dynstr_index; | |
798 | ||
799 | eht = elf_hash_table (info); | |
800 | ||
801 | entry->next = eht->dynlocal; | |
802 | eht->dynlocal = entry; | |
803 | entry->input_bfd = input_bfd; | |
804 | entry->input_indx = input_indx; | |
805 | eht->dynsymcount++; | |
806 | ||
807 | /* Whatever binding the symbol had before, it's now local. */ | |
808 | entry->isym.st_info | |
809 | = ELF_ST_INFO (STB_LOCAL, ELF_ST_TYPE (entry->isym.st_info)); | |
810 | ||
811 | /* The dynindx will be set at the end of size_dynamic_sections. */ | |
812 | ||
813 | return 1; | |
814 | } | |
815 | ||
30b30c21 | 816 | /* Return the dynindex of a local dynamic symbol. */ |
42751cf3 | 817 | |
30b30c21 | 818 | long |
268b6b39 AM |
819 | _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info *info, |
820 | bfd *input_bfd, | |
821 | long input_indx) | |
30b30c21 RH |
822 | { |
823 | struct elf_link_local_dynamic_entry *e; | |
824 | ||
825 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
826 | if (e->input_bfd == input_bfd && e->input_indx == input_indx) | |
827 | return e->dynindx; | |
828 | return -1; | |
829 | } | |
830 | ||
831 | /* This function is used to renumber the dynamic symbols, if some of | |
832 | them are removed because they are marked as local. This is called | |
833 | via elf_link_hash_traverse. */ | |
834 | ||
b34976b6 | 835 | static bfd_boolean |
268b6b39 AM |
836 | elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry *h, |
837 | void *data) | |
42751cf3 | 838 | { |
a50b1753 | 839 | size_t *count = (size_t *) data; |
30b30c21 | 840 | |
6fa3860b PB |
841 | if (h->forced_local) |
842 | return TRUE; | |
843 | ||
844 | if (h->dynindx != -1) | |
845 | h->dynindx = ++(*count); | |
846 | ||
847 | return TRUE; | |
848 | } | |
849 | ||
850 | ||
851 | /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with | |
852 | STB_LOCAL binding. */ | |
853 | ||
854 | static bfd_boolean | |
855 | elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry *h, | |
856 | void *data) | |
857 | { | |
a50b1753 | 858 | size_t *count = (size_t *) data; |
6fa3860b | 859 | |
6fa3860b PB |
860 | if (!h->forced_local) |
861 | return TRUE; | |
862 | ||
42751cf3 | 863 | if (h->dynindx != -1) |
30b30c21 RH |
864 | h->dynindx = ++(*count); |
865 | ||
b34976b6 | 866 | return TRUE; |
42751cf3 | 867 | } |
30b30c21 | 868 | |
aee6f5b4 AO |
869 | /* Return true if the dynamic symbol for a given section should be |
870 | omitted when creating a shared library. */ | |
871 | bfd_boolean | |
872 | _bfd_elf_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED, | |
873 | struct bfd_link_info *info, | |
874 | asection *p) | |
875 | { | |
74541ad4 | 876 | struct elf_link_hash_table *htab; |
ca55926c | 877 | asection *ip; |
74541ad4 | 878 | |
aee6f5b4 AO |
879 | switch (elf_section_data (p)->this_hdr.sh_type) |
880 | { | |
881 | case SHT_PROGBITS: | |
882 | case SHT_NOBITS: | |
883 | /* If sh_type is yet undecided, assume it could be | |
884 | SHT_PROGBITS/SHT_NOBITS. */ | |
885 | case SHT_NULL: | |
74541ad4 AM |
886 | htab = elf_hash_table (info); |
887 | if (p == htab->tls_sec) | |
888 | return FALSE; | |
889 | ||
890 | if (htab->text_index_section != NULL) | |
891 | return p != htab->text_index_section && p != htab->data_index_section; | |
892 | ||
ca55926c | 893 | return (htab->dynobj != NULL |
3d4d4302 | 894 | && (ip = bfd_get_linker_section (htab->dynobj, p->name)) != NULL |
ca55926c | 895 | && ip->output_section == p); |
aee6f5b4 AO |
896 | |
897 | /* There shouldn't be section relative relocations | |
898 | against any other section. */ | |
899 | default: | |
900 | return TRUE; | |
901 | } | |
902 | } | |
903 | ||
062e2358 | 904 | /* Assign dynsym indices. In a shared library we generate a section |
6fa3860b PB |
905 | symbol for each output section, which come first. Next come symbols |
906 | which have been forced to local binding. Then all of the back-end | |
907 | allocated local dynamic syms, followed by the rest of the global | |
908 | symbols. */ | |
30b30c21 | 909 | |
554220db AM |
910 | static unsigned long |
911 | _bfd_elf_link_renumber_dynsyms (bfd *output_bfd, | |
912 | struct bfd_link_info *info, | |
913 | unsigned long *section_sym_count) | |
30b30c21 RH |
914 | { |
915 | unsigned long dynsymcount = 0; | |
916 | ||
0e1862bb L |
917 | if (bfd_link_pic (info) |
918 | || elf_hash_table (info)->is_relocatable_executable) | |
30b30c21 | 919 | { |
aee6f5b4 | 920 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
30b30c21 RH |
921 | asection *p; |
922 | for (p = output_bfd->sections; p ; p = p->next) | |
8c37241b | 923 | if ((p->flags & SEC_EXCLUDE) == 0 |
aee6f5b4 AO |
924 | && (p->flags & SEC_ALLOC) != 0 |
925 | && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) | |
926 | elf_section_data (p)->dynindx = ++dynsymcount; | |
74541ad4 AM |
927 | else |
928 | elf_section_data (p)->dynindx = 0; | |
30b30c21 | 929 | } |
554220db | 930 | *section_sym_count = dynsymcount; |
30b30c21 | 931 | |
6fa3860b PB |
932 | elf_link_hash_traverse (elf_hash_table (info), |
933 | elf_link_renumber_local_hash_table_dynsyms, | |
934 | &dynsymcount); | |
935 | ||
30b30c21 RH |
936 | if (elf_hash_table (info)->dynlocal) |
937 | { | |
938 | struct elf_link_local_dynamic_entry *p; | |
939 | for (p = elf_hash_table (info)->dynlocal; p ; p = p->next) | |
940 | p->dynindx = ++dynsymcount; | |
941 | } | |
90ac2420 | 942 | elf_hash_table (info)->local_dynsymcount = dynsymcount; |
30b30c21 RH |
943 | |
944 | elf_link_hash_traverse (elf_hash_table (info), | |
945 | elf_link_renumber_hash_table_dynsyms, | |
946 | &dynsymcount); | |
947 | ||
d5486c43 L |
948 | /* There is an unused NULL entry at the head of the table which we |
949 | must account for in our count even if the table is empty since it | |
950 | is intended for the mandatory DT_SYMTAB tag (.dynsym section) in | |
951 | .dynamic section. */ | |
952 | dynsymcount++; | |
30b30c21 | 953 | |
ccabcbe5 AM |
954 | elf_hash_table (info)->dynsymcount = dynsymcount; |
955 | return dynsymcount; | |
30b30c21 | 956 | } |
252b5132 | 957 | |
54ac0771 L |
958 | /* Merge st_other field. */ |
959 | ||
960 | static void | |
961 | elf_merge_st_other (bfd *abfd, struct elf_link_hash_entry *h, | |
b8417128 | 962 | const Elf_Internal_Sym *isym, asection *sec, |
cd3416da | 963 | bfd_boolean definition, bfd_boolean dynamic) |
54ac0771 L |
964 | { |
965 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
966 | ||
967 | /* If st_other has a processor-specific meaning, specific | |
cd3416da | 968 | code might be needed here. */ |
54ac0771 L |
969 | if (bed->elf_backend_merge_symbol_attribute) |
970 | (*bed->elf_backend_merge_symbol_attribute) (h, isym, definition, | |
971 | dynamic); | |
972 | ||
cd3416da | 973 | if (!dynamic) |
54ac0771 | 974 | { |
cd3416da AM |
975 | unsigned symvis = ELF_ST_VISIBILITY (isym->st_other); |
976 | unsigned hvis = ELF_ST_VISIBILITY (h->other); | |
54ac0771 | 977 | |
cd3416da AM |
978 | /* Keep the most constraining visibility. Leave the remainder |
979 | of the st_other field to elf_backend_merge_symbol_attribute. */ | |
980 | if (symvis - 1 < hvis - 1) | |
981 | h->other = symvis | (h->other & ~ELF_ST_VISIBILITY (-1)); | |
54ac0771 | 982 | } |
b8417128 AM |
983 | else if (definition |
984 | && ELF_ST_VISIBILITY (isym->st_other) != STV_DEFAULT | |
985 | && (sec->flags & SEC_READONLY) == 0) | |
6cabe1ea | 986 | h->protected_def = 1; |
54ac0771 L |
987 | } |
988 | ||
4f3fedcf AM |
989 | /* This function is called when we want to merge a new symbol with an |
990 | existing symbol. It handles the various cases which arise when we | |
991 | find a definition in a dynamic object, or when there is already a | |
992 | definition in a dynamic object. The new symbol is described by | |
993 | NAME, SYM, PSEC, and PVALUE. We set SYM_HASH to the hash table | |
994 | entry. We set POLDBFD to the old symbol's BFD. We set POLD_WEAK | |
995 | if the old symbol was weak. We set POLD_ALIGNMENT to the alignment | |
996 | of an old common symbol. We set OVERRIDE if the old symbol is | |
997 | overriding a new definition. We set TYPE_CHANGE_OK if it is OK for | |
998 | the type to change. We set SIZE_CHANGE_OK if it is OK for the size | |
999 | to change. By OK to change, we mean that we shouldn't warn if the | |
1000 | type or size does change. */ | |
45d6a902 | 1001 | |
8a56bd02 | 1002 | static bfd_boolean |
268b6b39 AM |
1003 | _bfd_elf_merge_symbol (bfd *abfd, |
1004 | struct bfd_link_info *info, | |
1005 | const char *name, | |
1006 | Elf_Internal_Sym *sym, | |
1007 | asection **psec, | |
1008 | bfd_vma *pvalue, | |
4f3fedcf AM |
1009 | struct elf_link_hash_entry **sym_hash, |
1010 | bfd **poldbfd, | |
37a9e49a | 1011 | bfd_boolean *pold_weak, |
af44c138 | 1012 | unsigned int *pold_alignment, |
268b6b39 AM |
1013 | bfd_boolean *skip, |
1014 | bfd_boolean *override, | |
1015 | bfd_boolean *type_change_ok, | |
6e33951e L |
1016 | bfd_boolean *size_change_ok, |
1017 | bfd_boolean *matched) | |
252b5132 | 1018 | { |
7479dfd4 | 1019 | asection *sec, *oldsec; |
45d6a902 | 1020 | struct elf_link_hash_entry *h; |
90c984fc | 1021 | struct elf_link_hash_entry *hi; |
45d6a902 AM |
1022 | struct elf_link_hash_entry *flip; |
1023 | int bind; | |
1024 | bfd *oldbfd; | |
1025 | bfd_boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon; | |
0a36a439 | 1026 | bfd_boolean newweak, oldweak, newfunc, oldfunc; |
a4d8e49b | 1027 | const struct elf_backend_data *bed; |
6e33951e | 1028 | char *new_version; |
45d6a902 AM |
1029 | |
1030 | *skip = FALSE; | |
1031 | *override = FALSE; | |
1032 | ||
1033 | sec = *psec; | |
1034 | bind = ELF_ST_BIND (sym->st_info); | |
1035 | ||
1036 | if (! bfd_is_und_section (sec)) | |
1037 | h = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, FALSE, FALSE); | |
1038 | else | |
1039 | h = ((struct elf_link_hash_entry *) | |
1040 | bfd_wrapped_link_hash_lookup (abfd, info, name, TRUE, FALSE, FALSE)); | |
1041 | if (h == NULL) | |
1042 | return FALSE; | |
1043 | *sym_hash = h; | |
252b5132 | 1044 | |
88ba32a0 L |
1045 | bed = get_elf_backend_data (abfd); |
1046 | ||
6e33951e | 1047 | /* NEW_VERSION is the symbol version of the new symbol. */ |
422f1182 | 1048 | if (h->versioned != unversioned) |
6e33951e | 1049 | { |
422f1182 L |
1050 | /* Symbol version is unknown or versioned. */ |
1051 | new_version = strrchr (name, ELF_VER_CHR); | |
1052 | if (new_version) | |
1053 | { | |
1054 | if (h->versioned == unknown) | |
1055 | { | |
1056 | if (new_version > name && new_version[-1] != ELF_VER_CHR) | |
1057 | h->versioned = versioned_hidden; | |
1058 | else | |
1059 | h->versioned = versioned; | |
1060 | } | |
1061 | new_version += 1; | |
1062 | if (new_version[0] == '\0') | |
1063 | new_version = NULL; | |
1064 | } | |
1065 | else | |
1066 | h->versioned = unversioned; | |
6e33951e | 1067 | } |
422f1182 L |
1068 | else |
1069 | new_version = NULL; | |
6e33951e | 1070 | |
90c984fc L |
1071 | /* For merging, we only care about real symbols. But we need to make |
1072 | sure that indirect symbol dynamic flags are updated. */ | |
1073 | hi = h; | |
45d6a902 AM |
1074 | while (h->root.type == bfd_link_hash_indirect |
1075 | || h->root.type == bfd_link_hash_warning) | |
1076 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1077 | ||
6e33951e L |
1078 | if (!*matched) |
1079 | { | |
1080 | if (hi == h || h->root.type == bfd_link_hash_new) | |
1081 | *matched = TRUE; | |
1082 | else | |
1083 | { | |
ae7683d2 | 1084 | /* OLD_HIDDEN is true if the existing symbol is only visible |
6e33951e | 1085 | to the symbol with the same symbol version. NEW_HIDDEN is |
ae7683d2 | 1086 | true if the new symbol is only visible to the symbol with |
6e33951e | 1087 | the same symbol version. */ |
422f1182 L |
1088 | bfd_boolean old_hidden = h->versioned == versioned_hidden; |
1089 | bfd_boolean new_hidden = hi->versioned == versioned_hidden; | |
6e33951e L |
1090 | if (!old_hidden && !new_hidden) |
1091 | /* The new symbol matches the existing symbol if both | |
1092 | aren't hidden. */ | |
1093 | *matched = TRUE; | |
1094 | else | |
1095 | { | |
1096 | /* OLD_VERSION is the symbol version of the existing | |
1097 | symbol. */ | |
422f1182 L |
1098 | char *old_version; |
1099 | ||
1100 | if (h->versioned >= versioned) | |
1101 | old_version = strrchr (h->root.root.string, | |
1102 | ELF_VER_CHR) + 1; | |
1103 | else | |
1104 | old_version = NULL; | |
6e33951e L |
1105 | |
1106 | /* The new symbol matches the existing symbol if they | |
1107 | have the same symbol version. */ | |
1108 | *matched = (old_version == new_version | |
1109 | || (old_version != NULL | |
1110 | && new_version != NULL | |
1111 | && strcmp (old_version, new_version) == 0)); | |
1112 | } | |
1113 | } | |
1114 | } | |
1115 | ||
934bce08 AM |
1116 | /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the |
1117 | existing symbol. */ | |
1118 | ||
1119 | oldbfd = NULL; | |
1120 | oldsec = NULL; | |
1121 | switch (h->root.type) | |
1122 | { | |
1123 | default: | |
1124 | break; | |
1125 | ||
1126 | case bfd_link_hash_undefined: | |
1127 | case bfd_link_hash_undefweak: | |
1128 | oldbfd = h->root.u.undef.abfd; | |
1129 | break; | |
1130 | ||
1131 | case bfd_link_hash_defined: | |
1132 | case bfd_link_hash_defweak: | |
1133 | oldbfd = h->root.u.def.section->owner; | |
1134 | oldsec = h->root.u.def.section; | |
1135 | break; | |
1136 | ||
1137 | case bfd_link_hash_common: | |
1138 | oldbfd = h->root.u.c.p->section->owner; | |
1139 | oldsec = h->root.u.c.p->section; | |
1140 | if (pold_alignment) | |
1141 | *pold_alignment = h->root.u.c.p->alignment_power; | |
1142 | break; | |
1143 | } | |
1144 | if (poldbfd && *poldbfd == NULL) | |
1145 | *poldbfd = oldbfd; | |
1146 | ||
1147 | /* Differentiate strong and weak symbols. */ | |
1148 | newweak = bind == STB_WEAK; | |
1149 | oldweak = (h->root.type == bfd_link_hash_defweak | |
1150 | || h->root.type == bfd_link_hash_undefweak); | |
1151 | if (pold_weak) | |
1152 | *pold_weak = oldweak; | |
1153 | ||
1154 | /* This code is for coping with dynamic objects, and is only useful | |
1155 | if we are doing an ELF link. */ | |
1156 | if (!(*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) | |
1157 | return TRUE; | |
1158 | ||
40b36307 | 1159 | /* We have to check it for every instance since the first few may be |
ee659f1f | 1160 | references and not all compilers emit symbol type for undefined |
40b36307 L |
1161 | symbols. */ |
1162 | bfd_elf_link_mark_dynamic_symbol (info, h, sym); | |
1163 | ||
ee659f1f AM |
1164 | /* NEWDYN and OLDDYN indicate whether the new or old symbol, |
1165 | respectively, is from a dynamic object. */ | |
1166 | ||
1167 | newdyn = (abfd->flags & DYNAMIC) != 0; | |
1168 | ||
1169 | /* ref_dynamic_nonweak and dynamic_def flags track actual undefined | |
1170 | syms and defined syms in dynamic libraries respectively. | |
1171 | ref_dynamic on the other hand can be set for a symbol defined in | |
1172 | a dynamic library, and def_dynamic may not be set; When the | |
1173 | definition in a dynamic lib is overridden by a definition in the | |
1174 | executable use of the symbol in the dynamic lib becomes a | |
1175 | reference to the executable symbol. */ | |
1176 | if (newdyn) | |
1177 | { | |
1178 | if (bfd_is_und_section (sec)) | |
1179 | { | |
1180 | if (bind != STB_WEAK) | |
1181 | { | |
1182 | h->ref_dynamic_nonweak = 1; | |
1183 | hi->ref_dynamic_nonweak = 1; | |
1184 | } | |
1185 | } | |
1186 | else | |
1187 | { | |
6e33951e L |
1188 | /* Update the existing symbol only if they match. */ |
1189 | if (*matched) | |
1190 | h->dynamic_def = 1; | |
ee659f1f AM |
1191 | hi->dynamic_def = 1; |
1192 | } | |
1193 | } | |
1194 | ||
45d6a902 AM |
1195 | /* If we just created the symbol, mark it as being an ELF symbol. |
1196 | Other than that, there is nothing to do--there is no merge issue | |
1197 | with a newly defined symbol--so we just return. */ | |
1198 | ||
1199 | if (h->root.type == bfd_link_hash_new) | |
252b5132 | 1200 | { |
f5385ebf | 1201 | h->non_elf = 0; |
45d6a902 AM |
1202 | return TRUE; |
1203 | } | |
252b5132 | 1204 | |
45d6a902 AM |
1205 | /* In cases involving weak versioned symbols, we may wind up trying |
1206 | to merge a symbol with itself. Catch that here, to avoid the | |
1207 | confusion that results if we try to override a symbol with | |
1208 | itself. The additional tests catch cases like | |
1209 | _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a | |
1210 | dynamic object, which we do want to handle here. */ | |
1211 | if (abfd == oldbfd | |
895fa45f | 1212 | && (newweak || oldweak) |
45d6a902 | 1213 | && ((abfd->flags & DYNAMIC) == 0 |
f5385ebf | 1214 | || !h->def_regular)) |
45d6a902 AM |
1215 | return TRUE; |
1216 | ||
707bba77 | 1217 | olddyn = FALSE; |
45d6a902 AM |
1218 | if (oldbfd != NULL) |
1219 | olddyn = (oldbfd->flags & DYNAMIC) != 0; | |
707bba77 | 1220 | else if (oldsec != NULL) |
45d6a902 | 1221 | { |
707bba77 | 1222 | /* This handles the special SHN_MIPS_{TEXT,DATA} section |
45d6a902 | 1223 | indices used by MIPS ELF. */ |
707bba77 | 1224 | olddyn = (oldsec->symbol->flags & BSF_DYNAMIC) != 0; |
45d6a902 | 1225 | } |
252b5132 | 1226 | |
45d6a902 AM |
1227 | /* NEWDEF and OLDDEF indicate whether the new or old symbol, |
1228 | respectively, appear to be a definition rather than reference. */ | |
1229 | ||
707bba77 | 1230 | newdef = !bfd_is_und_section (sec) && !bfd_is_com_section (sec); |
45d6a902 | 1231 | |
707bba77 AM |
1232 | olddef = (h->root.type != bfd_link_hash_undefined |
1233 | && h->root.type != bfd_link_hash_undefweak | |
202ac193 | 1234 | && h->root.type != bfd_link_hash_common); |
45d6a902 | 1235 | |
0a36a439 L |
1236 | /* NEWFUNC and OLDFUNC indicate whether the new or old symbol, |
1237 | respectively, appear to be a function. */ | |
1238 | ||
1239 | newfunc = (ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1240 | && bed->is_function_type (ELF_ST_TYPE (sym->st_info))); | |
1241 | ||
1242 | oldfunc = (h->type != STT_NOTYPE | |
1243 | && bed->is_function_type (h->type)); | |
1244 | ||
5b677558 AM |
1245 | /* If creating a default indirect symbol ("foo" or "foo@") from a |
1246 | dynamic versioned definition ("foo@@") skip doing so if there is | |
1247 | an existing regular definition with a different type. We don't | |
1248 | want, for example, a "time" variable in the executable overriding | |
1249 | a "time" function in a shared library. */ | |
580a2b6e | 1250 | if (pold_alignment == NULL |
580a2b6e L |
1251 | && newdyn |
1252 | && newdef | |
1253 | && !olddyn | |
5b677558 AM |
1254 | && (olddef || h->root.type == bfd_link_hash_common) |
1255 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1256 | && ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1257 | && h->type != STT_NOTYPE | |
1258 | && !(newfunc && oldfunc)) | |
580a2b6e L |
1259 | { |
1260 | *skip = TRUE; | |
1261 | return TRUE; | |
1262 | } | |
1263 | ||
4c34aff8 AM |
1264 | /* Check TLS symbols. We don't check undefined symbols introduced |
1265 | by "ld -u" which have no type (and oldbfd NULL), and we don't | |
1266 | check symbols from plugins because they also have no type. */ | |
1267 | if (oldbfd != NULL | |
1268 | && (oldbfd->flags & BFD_PLUGIN) == 0 | |
1269 | && (abfd->flags & BFD_PLUGIN) == 0 | |
1270 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1271 | && (ELF_ST_TYPE (sym->st_info) == STT_TLS || h->type == STT_TLS)) | |
7479dfd4 L |
1272 | { |
1273 | bfd *ntbfd, *tbfd; | |
1274 | bfd_boolean ntdef, tdef; | |
1275 | asection *ntsec, *tsec; | |
1276 | ||
1277 | if (h->type == STT_TLS) | |
1278 | { | |
3b36f7e6 | 1279 | ntbfd = abfd; |
7479dfd4 L |
1280 | ntsec = sec; |
1281 | ntdef = newdef; | |
1282 | tbfd = oldbfd; | |
1283 | tsec = oldsec; | |
1284 | tdef = olddef; | |
1285 | } | |
1286 | else | |
1287 | { | |
1288 | ntbfd = oldbfd; | |
1289 | ntsec = oldsec; | |
1290 | ntdef = olddef; | |
1291 | tbfd = abfd; | |
1292 | tsec = sec; | |
1293 | tdef = newdef; | |
1294 | } | |
1295 | ||
1296 | if (tdef && ntdef) | |
4eca0228 | 1297 | _bfd_error_handler |
695344c0 | 1298 | /* xgettext:c-format */ |
191c0c42 AM |
1299 | (_("%s: TLS definition in %B section %A " |
1300 | "mismatches non-TLS definition in %B section %A"), | |
7479dfd4 L |
1301 | tbfd, tsec, ntbfd, ntsec, h->root.root.string); |
1302 | else if (!tdef && !ntdef) | |
4eca0228 | 1303 | _bfd_error_handler |
695344c0 | 1304 | /* xgettext:c-format */ |
191c0c42 AM |
1305 | (_("%s: TLS reference in %B " |
1306 | "mismatches non-TLS reference in %B"), | |
7479dfd4 L |
1307 | tbfd, ntbfd, h->root.root.string); |
1308 | else if (tdef) | |
4eca0228 | 1309 | _bfd_error_handler |
695344c0 | 1310 | /* xgettext:c-format */ |
191c0c42 AM |
1311 | (_("%s: TLS definition in %B section %A " |
1312 | "mismatches non-TLS reference in %B"), | |
7479dfd4 L |
1313 | tbfd, tsec, ntbfd, h->root.root.string); |
1314 | else | |
4eca0228 | 1315 | _bfd_error_handler |
695344c0 | 1316 | /* xgettext:c-format */ |
191c0c42 AM |
1317 | (_("%s: TLS reference in %B " |
1318 | "mismatches non-TLS definition in %B section %A"), | |
7479dfd4 L |
1319 | tbfd, ntbfd, ntsec, h->root.root.string); |
1320 | ||
1321 | bfd_set_error (bfd_error_bad_value); | |
1322 | return FALSE; | |
1323 | } | |
1324 | ||
45d6a902 AM |
1325 | /* If the old symbol has non-default visibility, we ignore the new |
1326 | definition from a dynamic object. */ | |
1327 | if (newdyn | |
9c7a29a3 | 1328 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 AM |
1329 | && !bfd_is_und_section (sec)) |
1330 | { | |
1331 | *skip = TRUE; | |
1332 | /* Make sure this symbol is dynamic. */ | |
f5385ebf | 1333 | h->ref_dynamic = 1; |
90c984fc | 1334 | hi->ref_dynamic = 1; |
45d6a902 AM |
1335 | /* A protected symbol has external availability. Make sure it is |
1336 | recorded as dynamic. | |
1337 | ||
1338 | FIXME: Should we check type and size for protected symbol? */ | |
1339 | if (ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
c152c796 | 1340 | return bfd_elf_link_record_dynamic_symbol (info, h); |
45d6a902 AM |
1341 | else |
1342 | return TRUE; | |
1343 | } | |
1344 | else if (!newdyn | |
9c7a29a3 | 1345 | && ELF_ST_VISIBILITY (sym->st_other) != STV_DEFAULT |
f5385ebf | 1346 | && h->def_dynamic) |
45d6a902 AM |
1347 | { |
1348 | /* If the new symbol with non-default visibility comes from a | |
1349 | relocatable file and the old definition comes from a dynamic | |
1350 | object, we remove the old definition. */ | |
6c9b78e6 | 1351 | if (hi->root.type == bfd_link_hash_indirect) |
d2dee3b2 L |
1352 | { |
1353 | /* Handle the case where the old dynamic definition is | |
1354 | default versioned. We need to copy the symbol info from | |
1355 | the symbol with default version to the normal one if it | |
1356 | was referenced before. */ | |
1357 | if (h->ref_regular) | |
1358 | { | |
6c9b78e6 | 1359 | hi->root.type = h->root.type; |
d2dee3b2 | 1360 | h->root.type = bfd_link_hash_indirect; |
6c9b78e6 | 1361 | (*bed->elf_backend_copy_indirect_symbol) (info, hi, h); |
aed81c4e | 1362 | |
6c9b78e6 | 1363 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; |
aed81c4e | 1364 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
d2dee3b2 | 1365 | { |
aed81c4e MR |
1366 | /* If the new symbol is hidden or internal, completely undo |
1367 | any dynamic link state. */ | |
1368 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1369 | h->forced_local = 0; | |
1370 | h->ref_dynamic = 0; | |
d2dee3b2 L |
1371 | } |
1372 | else | |
aed81c4e MR |
1373 | h->ref_dynamic = 1; |
1374 | ||
1375 | h->def_dynamic = 0; | |
aed81c4e MR |
1376 | /* FIXME: Should we check type and size for protected symbol? */ |
1377 | h->size = 0; | |
1378 | h->type = 0; | |
1379 | ||
6c9b78e6 | 1380 | h = hi; |
d2dee3b2 L |
1381 | } |
1382 | else | |
6c9b78e6 | 1383 | h = hi; |
d2dee3b2 | 1384 | } |
1de1a317 | 1385 | |
f5eda473 AM |
1386 | /* If the old symbol was undefined before, then it will still be |
1387 | on the undefs list. If the new symbol is undefined or | |
1388 | common, we can't make it bfd_link_hash_new here, because new | |
1389 | undefined or common symbols will be added to the undefs list | |
1390 | by _bfd_generic_link_add_one_symbol. Symbols may not be | |
1391 | added twice to the undefs list. Also, if the new symbol is | |
1392 | undefweak then we don't want to lose the strong undef. */ | |
1393 | if (h->root.u.undef.next || info->hash->undefs_tail == &h->root) | |
1de1a317 | 1394 | { |
1de1a317 | 1395 | h->root.type = bfd_link_hash_undefined; |
1de1a317 L |
1396 | h->root.u.undef.abfd = abfd; |
1397 | } | |
1398 | else | |
1399 | { | |
1400 | h->root.type = bfd_link_hash_new; | |
1401 | h->root.u.undef.abfd = NULL; | |
1402 | } | |
1403 | ||
f5eda473 | 1404 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
252b5132 | 1405 | { |
f5eda473 AM |
1406 | /* If the new symbol is hidden or internal, completely undo |
1407 | any dynamic link state. */ | |
1408 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1409 | h->forced_local = 0; | |
1410 | h->ref_dynamic = 0; | |
45d6a902 | 1411 | } |
f5eda473 AM |
1412 | else |
1413 | h->ref_dynamic = 1; | |
1414 | h->def_dynamic = 0; | |
45d6a902 AM |
1415 | /* FIXME: Should we check type and size for protected symbol? */ |
1416 | h->size = 0; | |
1417 | h->type = 0; | |
1418 | return TRUE; | |
1419 | } | |
14a793b2 | 1420 | |
15b43f48 AM |
1421 | /* If a new weak symbol definition comes from a regular file and the |
1422 | old symbol comes from a dynamic library, we treat the new one as | |
1423 | strong. Similarly, an old weak symbol definition from a regular | |
1424 | file is treated as strong when the new symbol comes from a dynamic | |
1425 | library. Further, an old weak symbol from a dynamic library is | |
1426 | treated as strong if the new symbol is from a dynamic library. | |
1427 | This reflects the way glibc's ld.so works. | |
1428 | ||
1429 | Do this before setting *type_change_ok or *size_change_ok so that | |
1430 | we warn properly when dynamic library symbols are overridden. */ | |
1431 | ||
1432 | if (newdef && !newdyn && olddyn) | |
0f8a2703 | 1433 | newweak = FALSE; |
15b43f48 | 1434 | if (olddef && newdyn) |
0f8a2703 AM |
1435 | oldweak = FALSE; |
1436 | ||
d334575b | 1437 | /* Allow changes between different types of function symbol. */ |
0a36a439 | 1438 | if (newfunc && oldfunc) |
fcb93ecf PB |
1439 | *type_change_ok = TRUE; |
1440 | ||
79349b09 AM |
1441 | /* It's OK to change the type if either the existing symbol or the |
1442 | new symbol is weak. A type change is also OK if the old symbol | |
1443 | is undefined and the new symbol is defined. */ | |
252b5132 | 1444 | |
79349b09 AM |
1445 | if (oldweak |
1446 | || newweak | |
1447 | || (newdef | |
1448 | && h->root.type == bfd_link_hash_undefined)) | |
1449 | *type_change_ok = TRUE; | |
1450 | ||
1451 | /* It's OK to change the size if either the existing symbol or the | |
1452 | new symbol is weak, or if the old symbol is undefined. */ | |
1453 | ||
1454 | if (*type_change_ok | |
1455 | || h->root.type == bfd_link_hash_undefined) | |
1456 | *size_change_ok = TRUE; | |
45d6a902 | 1457 | |
45d6a902 AM |
1458 | /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old |
1459 | symbol, respectively, appears to be a common symbol in a dynamic | |
1460 | object. If a symbol appears in an uninitialized section, and is | |
1461 | not weak, and is not a function, then it may be a common symbol | |
1462 | which was resolved when the dynamic object was created. We want | |
1463 | to treat such symbols specially, because they raise special | |
1464 | considerations when setting the symbol size: if the symbol | |
1465 | appears as a common symbol in a regular object, and the size in | |
1466 | the regular object is larger, we must make sure that we use the | |
1467 | larger size. This problematic case can always be avoided in C, | |
1468 | but it must be handled correctly when using Fortran shared | |
1469 | libraries. | |
1470 | ||
1471 | Note that if NEWDYNCOMMON is set, NEWDEF will be set, and | |
1472 | likewise for OLDDYNCOMMON and OLDDEF. | |
1473 | ||
1474 | Note that this test is just a heuristic, and that it is quite | |
1475 | possible to have an uninitialized symbol in a shared object which | |
1476 | is really a definition, rather than a common symbol. This could | |
1477 | lead to some minor confusion when the symbol really is a common | |
1478 | symbol in some regular object. However, I think it will be | |
1479 | harmless. */ | |
1480 | ||
1481 | if (newdyn | |
1482 | && newdef | |
79349b09 | 1483 | && !newweak |
45d6a902 AM |
1484 | && (sec->flags & SEC_ALLOC) != 0 |
1485 | && (sec->flags & SEC_LOAD) == 0 | |
1486 | && sym->st_size > 0 | |
0a36a439 | 1487 | && !newfunc) |
45d6a902 AM |
1488 | newdyncommon = TRUE; |
1489 | else | |
1490 | newdyncommon = FALSE; | |
1491 | ||
1492 | if (olddyn | |
1493 | && olddef | |
1494 | && h->root.type == bfd_link_hash_defined | |
f5385ebf | 1495 | && h->def_dynamic |
45d6a902 AM |
1496 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 |
1497 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
1498 | && h->size > 0 | |
0a36a439 | 1499 | && !oldfunc) |
45d6a902 AM |
1500 | olddyncommon = TRUE; |
1501 | else | |
1502 | olddyncommon = FALSE; | |
1503 | ||
a4d8e49b L |
1504 | /* We now know everything about the old and new symbols. We ask the |
1505 | backend to check if we can merge them. */ | |
5d13b3b3 AM |
1506 | if (bed->merge_symbol != NULL) |
1507 | { | |
1508 | if (!bed->merge_symbol (h, sym, psec, newdef, olddef, oldbfd, oldsec)) | |
1509 | return FALSE; | |
1510 | sec = *psec; | |
1511 | } | |
a4d8e49b | 1512 | |
45d6a902 AM |
1513 | /* If both the old and the new symbols look like common symbols in a |
1514 | dynamic object, set the size of the symbol to the larger of the | |
1515 | two. */ | |
1516 | ||
1517 | if (olddyncommon | |
1518 | && newdyncommon | |
1519 | && sym->st_size != h->size) | |
1520 | { | |
1521 | /* Since we think we have two common symbols, issue a multiple | |
1522 | common warning if desired. Note that we only warn if the | |
1523 | size is different. If the size is the same, we simply let | |
1524 | the old symbol override the new one as normally happens with | |
1525 | symbols defined in dynamic objects. */ | |
1526 | ||
1a72702b AM |
1527 | (*info->callbacks->multiple_common) (info, &h->root, abfd, |
1528 | bfd_link_hash_common, sym->st_size); | |
45d6a902 AM |
1529 | if (sym->st_size > h->size) |
1530 | h->size = sym->st_size; | |
252b5132 | 1531 | |
45d6a902 | 1532 | *size_change_ok = TRUE; |
252b5132 RH |
1533 | } |
1534 | ||
45d6a902 AM |
1535 | /* If we are looking at a dynamic object, and we have found a |
1536 | definition, we need to see if the symbol was already defined by | |
1537 | some other object. If so, we want to use the existing | |
1538 | definition, and we do not want to report a multiple symbol | |
1539 | definition error; we do this by clobbering *PSEC to be | |
1540 | bfd_und_section_ptr. | |
1541 | ||
1542 | We treat a common symbol as a definition if the symbol in the | |
1543 | shared library is a function, since common symbols always | |
1544 | represent variables; this can cause confusion in principle, but | |
1545 | any such confusion would seem to indicate an erroneous program or | |
1546 | shared library. We also permit a common symbol in a regular | |
202ac193 L |
1547 | object to override a weak symbol in a shared object. A common |
1548 | symbol in executable also overrides a symbol in a shared object. */ | |
45d6a902 AM |
1549 | |
1550 | if (newdyn | |
1551 | && newdef | |
77cfaee6 | 1552 | && (olddef |
45d6a902 | 1553 | || (h->root.type == bfd_link_hash_common |
202ac193 L |
1554 | && (newweak |
1555 | || newfunc | |
1556 | || (!olddyn && bfd_link_executable (info)))))) | |
45d6a902 AM |
1557 | { |
1558 | *override = TRUE; | |
1559 | newdef = FALSE; | |
1560 | newdyncommon = FALSE; | |
252b5132 | 1561 | |
45d6a902 AM |
1562 | *psec = sec = bfd_und_section_ptr; |
1563 | *size_change_ok = TRUE; | |
252b5132 | 1564 | |
45d6a902 AM |
1565 | /* If we get here when the old symbol is a common symbol, then |
1566 | we are explicitly letting it override a weak symbol or | |
1567 | function in a dynamic object, and we don't want to warn about | |
1568 | a type change. If the old symbol is a defined symbol, a type | |
1569 | change warning may still be appropriate. */ | |
252b5132 | 1570 | |
45d6a902 AM |
1571 | if (h->root.type == bfd_link_hash_common) |
1572 | *type_change_ok = TRUE; | |
1573 | } | |
1574 | ||
1575 | /* Handle the special case of an old common symbol merging with a | |
1576 | new symbol which looks like a common symbol in a shared object. | |
1577 | We change *PSEC and *PVALUE to make the new symbol look like a | |
91134c82 L |
1578 | common symbol, and let _bfd_generic_link_add_one_symbol do the |
1579 | right thing. */ | |
45d6a902 AM |
1580 | |
1581 | if (newdyncommon | |
1582 | && h->root.type == bfd_link_hash_common) | |
1583 | { | |
1584 | *override = TRUE; | |
1585 | newdef = FALSE; | |
1586 | newdyncommon = FALSE; | |
1587 | *pvalue = sym->st_size; | |
a4d8e49b | 1588 | *psec = sec = bed->common_section (oldsec); |
45d6a902 AM |
1589 | *size_change_ok = TRUE; |
1590 | } | |
1591 | ||
c5e2cead | 1592 | /* Skip weak definitions of symbols that are already defined. */ |
f41d945b | 1593 | if (newdef && olddef && newweak) |
54ac0771 | 1594 | { |
35ed3f94 | 1595 | /* Don't skip new non-IR weak syms. */ |
3a5dbfb2 AM |
1596 | if (!(oldbfd != NULL |
1597 | && (oldbfd->flags & BFD_PLUGIN) != 0 | |
35ed3f94 | 1598 | && (abfd->flags & BFD_PLUGIN) == 0)) |
57fa7b8c AM |
1599 | { |
1600 | newdef = FALSE; | |
1601 | *skip = TRUE; | |
1602 | } | |
54ac0771 L |
1603 | |
1604 | /* Merge st_other. If the symbol already has a dynamic index, | |
1605 | but visibility says it should not be visible, turn it into a | |
1606 | local symbol. */ | |
b8417128 | 1607 | elf_merge_st_other (abfd, h, sym, sec, newdef, newdyn); |
54ac0771 L |
1608 | if (h->dynindx != -1) |
1609 | switch (ELF_ST_VISIBILITY (h->other)) | |
1610 | { | |
1611 | case STV_INTERNAL: | |
1612 | case STV_HIDDEN: | |
1613 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1614 | break; | |
1615 | } | |
1616 | } | |
c5e2cead | 1617 | |
45d6a902 AM |
1618 | /* If the old symbol is from a dynamic object, and the new symbol is |
1619 | a definition which is not from a dynamic object, then the new | |
1620 | symbol overrides the old symbol. Symbols from regular files | |
1621 | always take precedence over symbols from dynamic objects, even if | |
1622 | they are defined after the dynamic object in the link. | |
1623 | ||
1624 | As above, we again permit a common symbol in a regular object to | |
1625 | override a definition in a shared object if the shared object | |
0f8a2703 | 1626 | symbol is a function or is weak. */ |
45d6a902 AM |
1627 | |
1628 | flip = NULL; | |
77cfaee6 | 1629 | if (!newdyn |
45d6a902 AM |
1630 | && (newdef |
1631 | || (bfd_is_com_section (sec) | |
0a36a439 | 1632 | && (oldweak || oldfunc))) |
45d6a902 AM |
1633 | && olddyn |
1634 | && olddef | |
f5385ebf | 1635 | && h->def_dynamic) |
45d6a902 AM |
1636 | { |
1637 | /* Change the hash table entry to undefined, and let | |
1638 | _bfd_generic_link_add_one_symbol do the right thing with the | |
1639 | new definition. */ | |
1640 | ||
1641 | h->root.type = bfd_link_hash_undefined; | |
1642 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1643 | *size_change_ok = TRUE; | |
1644 | ||
1645 | olddef = FALSE; | |
1646 | olddyncommon = FALSE; | |
1647 | ||
1648 | /* We again permit a type change when a common symbol may be | |
1649 | overriding a function. */ | |
1650 | ||
1651 | if (bfd_is_com_section (sec)) | |
0a36a439 L |
1652 | { |
1653 | if (oldfunc) | |
1654 | { | |
1655 | /* If a common symbol overrides a function, make sure | |
1656 | that it isn't defined dynamically nor has type | |
1657 | function. */ | |
1658 | h->def_dynamic = 0; | |
1659 | h->type = STT_NOTYPE; | |
1660 | } | |
1661 | *type_change_ok = TRUE; | |
1662 | } | |
45d6a902 | 1663 | |
6c9b78e6 AM |
1664 | if (hi->root.type == bfd_link_hash_indirect) |
1665 | flip = hi; | |
45d6a902 AM |
1666 | else |
1667 | /* This union may have been set to be non-NULL when this symbol | |
1668 | was seen in a dynamic object. We must force the union to be | |
1669 | NULL, so that it is correct for a regular symbol. */ | |
1670 | h->verinfo.vertree = NULL; | |
1671 | } | |
1672 | ||
1673 | /* Handle the special case of a new common symbol merging with an | |
1674 | old symbol that looks like it might be a common symbol defined in | |
1675 | a shared object. Note that we have already handled the case in | |
1676 | which a new common symbol should simply override the definition | |
1677 | in the shared library. */ | |
1678 | ||
1679 | if (! newdyn | |
1680 | && bfd_is_com_section (sec) | |
1681 | && olddyncommon) | |
1682 | { | |
1683 | /* It would be best if we could set the hash table entry to a | |
1684 | common symbol, but we don't know what to use for the section | |
1685 | or the alignment. */ | |
1a72702b AM |
1686 | (*info->callbacks->multiple_common) (info, &h->root, abfd, |
1687 | bfd_link_hash_common, sym->st_size); | |
45d6a902 | 1688 | |
4cc11e76 | 1689 | /* If the presumed common symbol in the dynamic object is |
45d6a902 AM |
1690 | larger, pretend that the new symbol has its size. */ |
1691 | ||
1692 | if (h->size > *pvalue) | |
1693 | *pvalue = h->size; | |
1694 | ||
af44c138 L |
1695 | /* We need to remember the alignment required by the symbol |
1696 | in the dynamic object. */ | |
1697 | BFD_ASSERT (pold_alignment); | |
1698 | *pold_alignment = h->root.u.def.section->alignment_power; | |
45d6a902 AM |
1699 | |
1700 | olddef = FALSE; | |
1701 | olddyncommon = FALSE; | |
1702 | ||
1703 | h->root.type = bfd_link_hash_undefined; | |
1704 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1705 | ||
1706 | *size_change_ok = TRUE; | |
1707 | *type_change_ok = TRUE; | |
1708 | ||
6c9b78e6 AM |
1709 | if (hi->root.type == bfd_link_hash_indirect) |
1710 | flip = hi; | |
45d6a902 AM |
1711 | else |
1712 | h->verinfo.vertree = NULL; | |
1713 | } | |
1714 | ||
1715 | if (flip != NULL) | |
1716 | { | |
1717 | /* Handle the case where we had a versioned symbol in a dynamic | |
1718 | library and now find a definition in a normal object. In this | |
1719 | case, we make the versioned symbol point to the normal one. */ | |
45d6a902 | 1720 | flip->root.type = h->root.type; |
00cbee0a | 1721 | flip->root.u.undef.abfd = h->root.u.undef.abfd; |
45d6a902 AM |
1722 | h->root.type = bfd_link_hash_indirect; |
1723 | h->root.u.i.link = (struct bfd_link_hash_entry *) flip; | |
fcfa13d2 | 1724 | (*bed->elf_backend_copy_indirect_symbol) (info, flip, h); |
f5385ebf | 1725 | if (h->def_dynamic) |
45d6a902 | 1726 | { |
f5385ebf AM |
1727 | h->def_dynamic = 0; |
1728 | flip->ref_dynamic = 1; | |
45d6a902 AM |
1729 | } |
1730 | } | |
1731 | ||
45d6a902 AM |
1732 | return TRUE; |
1733 | } | |
1734 | ||
1735 | /* This function is called to create an indirect symbol from the | |
1736 | default for the symbol with the default version if needed. The | |
4f3fedcf | 1737 | symbol is described by H, NAME, SYM, SEC, and VALUE. We |
0f8a2703 | 1738 | set DYNSYM if the new indirect symbol is dynamic. */ |
45d6a902 | 1739 | |
28caa186 | 1740 | static bfd_boolean |
268b6b39 AM |
1741 | _bfd_elf_add_default_symbol (bfd *abfd, |
1742 | struct bfd_link_info *info, | |
1743 | struct elf_link_hash_entry *h, | |
1744 | const char *name, | |
1745 | Elf_Internal_Sym *sym, | |
4f3fedcf AM |
1746 | asection *sec, |
1747 | bfd_vma value, | |
1748 | bfd **poldbfd, | |
e3c9d234 | 1749 | bfd_boolean *dynsym) |
45d6a902 AM |
1750 | { |
1751 | bfd_boolean type_change_ok; | |
1752 | bfd_boolean size_change_ok; | |
1753 | bfd_boolean skip; | |
1754 | char *shortname; | |
1755 | struct elf_link_hash_entry *hi; | |
1756 | struct bfd_link_hash_entry *bh; | |
9c5bfbb7 | 1757 | const struct elf_backend_data *bed; |
45d6a902 AM |
1758 | bfd_boolean collect; |
1759 | bfd_boolean dynamic; | |
e3c9d234 | 1760 | bfd_boolean override; |
45d6a902 AM |
1761 | char *p; |
1762 | size_t len, shortlen; | |
ffd65175 | 1763 | asection *tmp_sec; |
6e33951e | 1764 | bfd_boolean matched; |
45d6a902 | 1765 | |
422f1182 L |
1766 | if (h->versioned == unversioned || h->versioned == versioned_hidden) |
1767 | return TRUE; | |
1768 | ||
45d6a902 AM |
1769 | /* If this symbol has a version, and it is the default version, we |
1770 | create an indirect symbol from the default name to the fully | |
1771 | decorated name. This will cause external references which do not | |
1772 | specify a version to be bound to this version of the symbol. */ | |
1773 | p = strchr (name, ELF_VER_CHR); | |
422f1182 L |
1774 | if (h->versioned == unknown) |
1775 | { | |
1776 | if (p == NULL) | |
1777 | { | |
1778 | h->versioned = unversioned; | |
1779 | return TRUE; | |
1780 | } | |
1781 | else | |
1782 | { | |
1783 | if (p[1] != ELF_VER_CHR) | |
1784 | { | |
1785 | h->versioned = versioned_hidden; | |
1786 | return TRUE; | |
1787 | } | |
1788 | else | |
1789 | h->versioned = versioned; | |
1790 | } | |
1791 | } | |
4373f8af L |
1792 | else |
1793 | { | |
1794 | /* PR ld/19073: We may see an unversioned definition after the | |
1795 | default version. */ | |
1796 | if (p == NULL) | |
1797 | return TRUE; | |
1798 | } | |
45d6a902 | 1799 | |
45d6a902 AM |
1800 | bed = get_elf_backend_data (abfd); |
1801 | collect = bed->collect; | |
1802 | dynamic = (abfd->flags & DYNAMIC) != 0; | |
1803 | ||
1804 | shortlen = p - name; | |
a50b1753 | 1805 | shortname = (char *) bfd_hash_allocate (&info->hash->table, shortlen + 1); |
45d6a902 AM |
1806 | if (shortname == NULL) |
1807 | return FALSE; | |
1808 | memcpy (shortname, name, shortlen); | |
1809 | shortname[shortlen] = '\0'; | |
1810 | ||
1811 | /* We are going to create a new symbol. Merge it with any existing | |
1812 | symbol with this name. For the purposes of the merge, act as | |
1813 | though we were defining the symbol we just defined, although we | |
1814 | actually going to define an indirect symbol. */ | |
1815 | type_change_ok = FALSE; | |
1816 | size_change_ok = FALSE; | |
6e33951e | 1817 | matched = TRUE; |
ffd65175 AM |
1818 | tmp_sec = sec; |
1819 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
4f3fedcf | 1820 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 1821 | &type_change_ok, &size_change_ok, &matched)) |
45d6a902 AM |
1822 | return FALSE; |
1823 | ||
1824 | if (skip) | |
1825 | goto nondefault; | |
1826 | ||
5b677558 AM |
1827 | if (hi->def_regular) |
1828 | { | |
1829 | /* If the undecorated symbol will have a version added by a | |
1830 | script different to H, then don't indirect to/from the | |
1831 | undecorated symbol. This isn't ideal because we may not yet | |
1832 | have seen symbol versions, if given by a script on the | |
1833 | command line rather than via --version-script. */ | |
1834 | if (hi->verinfo.vertree == NULL && info->version_info != NULL) | |
1835 | { | |
1836 | bfd_boolean hide; | |
1837 | ||
1838 | hi->verinfo.vertree | |
1839 | = bfd_find_version_for_sym (info->version_info, | |
1840 | hi->root.root.string, &hide); | |
1841 | if (hi->verinfo.vertree != NULL && hide) | |
1842 | { | |
1843 | (*bed->elf_backend_hide_symbol) (info, hi, TRUE); | |
1844 | goto nondefault; | |
1845 | } | |
1846 | } | |
1847 | if (hi->verinfo.vertree != NULL | |
1848 | && strcmp (p + 1 + (p[1] == '@'), hi->verinfo.vertree->name) != 0) | |
1849 | goto nondefault; | |
1850 | } | |
1851 | ||
45d6a902 AM |
1852 | if (! override) |
1853 | { | |
c6e8a9a8 | 1854 | /* Add the default symbol if not performing a relocatable link. */ |
0e1862bb | 1855 | if (! bfd_link_relocatable (info)) |
c6e8a9a8 L |
1856 | { |
1857 | bh = &hi->root; | |
1858 | if (! (_bfd_generic_link_add_one_symbol | |
1859 | (info, abfd, shortname, BSF_INDIRECT, | |
1860 | bfd_ind_section_ptr, | |
1861 | 0, name, FALSE, collect, &bh))) | |
1862 | return FALSE; | |
1863 | hi = (struct elf_link_hash_entry *) bh; | |
1864 | } | |
45d6a902 AM |
1865 | } |
1866 | else | |
1867 | { | |
1868 | /* In this case the symbol named SHORTNAME is overriding the | |
1869 | indirect symbol we want to add. We were planning on making | |
1870 | SHORTNAME an indirect symbol referring to NAME. SHORTNAME | |
1871 | is the name without a version. NAME is the fully versioned | |
1872 | name, and it is the default version. | |
1873 | ||
1874 | Overriding means that we already saw a definition for the | |
1875 | symbol SHORTNAME in a regular object, and it is overriding | |
1876 | the symbol defined in the dynamic object. | |
1877 | ||
1878 | When this happens, we actually want to change NAME, the | |
1879 | symbol we just added, to refer to SHORTNAME. This will cause | |
1880 | references to NAME in the shared object to become references | |
1881 | to SHORTNAME in the regular object. This is what we expect | |
1882 | when we override a function in a shared object: that the | |
1883 | references in the shared object will be mapped to the | |
1884 | definition in the regular object. */ | |
1885 | ||
1886 | while (hi->root.type == bfd_link_hash_indirect | |
1887 | || hi->root.type == bfd_link_hash_warning) | |
1888 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1889 | ||
1890 | h->root.type = bfd_link_hash_indirect; | |
1891 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; | |
f5385ebf | 1892 | if (h->def_dynamic) |
45d6a902 | 1893 | { |
f5385ebf AM |
1894 | h->def_dynamic = 0; |
1895 | hi->ref_dynamic = 1; | |
1896 | if (hi->ref_regular | |
1897 | || hi->def_regular) | |
45d6a902 | 1898 | { |
c152c796 | 1899 | if (! bfd_elf_link_record_dynamic_symbol (info, hi)) |
45d6a902 AM |
1900 | return FALSE; |
1901 | } | |
1902 | } | |
1903 | ||
1904 | /* Now set HI to H, so that the following code will set the | |
1905 | other fields correctly. */ | |
1906 | hi = h; | |
1907 | } | |
1908 | ||
fab4a87f L |
1909 | /* Check if HI is a warning symbol. */ |
1910 | if (hi->root.type == bfd_link_hash_warning) | |
1911 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1912 | ||
45d6a902 AM |
1913 | /* If there is a duplicate definition somewhere, then HI may not |
1914 | point to an indirect symbol. We will have reported an error to | |
1915 | the user in that case. */ | |
1916 | ||
1917 | if (hi->root.type == bfd_link_hash_indirect) | |
1918 | { | |
1919 | struct elf_link_hash_entry *ht; | |
1920 | ||
45d6a902 | 1921 | ht = (struct elf_link_hash_entry *) hi->root.u.i.link; |
fcfa13d2 | 1922 | (*bed->elf_backend_copy_indirect_symbol) (info, ht, hi); |
45d6a902 | 1923 | |
68c88cd4 AM |
1924 | /* A reference to the SHORTNAME symbol from a dynamic library |
1925 | will be satisfied by the versioned symbol at runtime. In | |
1926 | effect, we have a reference to the versioned symbol. */ | |
1927 | ht->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; | |
1928 | hi->dynamic_def |= ht->dynamic_def; | |
1929 | ||
45d6a902 AM |
1930 | /* See if the new flags lead us to realize that the symbol must |
1931 | be dynamic. */ | |
1932 | if (! *dynsym) | |
1933 | { | |
1934 | if (! dynamic) | |
1935 | { | |
0e1862bb | 1936 | if (! bfd_link_executable (info) |
90c984fc | 1937 | || hi->def_dynamic |
f5385ebf | 1938 | || hi->ref_dynamic) |
45d6a902 AM |
1939 | *dynsym = TRUE; |
1940 | } | |
1941 | else | |
1942 | { | |
f5385ebf | 1943 | if (hi->ref_regular) |
45d6a902 AM |
1944 | *dynsym = TRUE; |
1945 | } | |
1946 | } | |
1947 | } | |
1948 | ||
1949 | /* We also need to define an indirection from the nondefault version | |
1950 | of the symbol. */ | |
1951 | ||
1952 | nondefault: | |
1953 | len = strlen (name); | |
a50b1753 | 1954 | shortname = (char *) bfd_hash_allocate (&info->hash->table, len); |
45d6a902 AM |
1955 | if (shortname == NULL) |
1956 | return FALSE; | |
1957 | memcpy (shortname, name, shortlen); | |
1958 | memcpy (shortname + shortlen, p + 1, len - shortlen); | |
1959 | ||
1960 | /* Once again, merge with any existing symbol. */ | |
1961 | type_change_ok = FALSE; | |
1962 | size_change_ok = FALSE; | |
ffd65175 AM |
1963 | tmp_sec = sec; |
1964 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
115c6d5c | 1965 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 1966 | &type_change_ok, &size_change_ok, &matched)) |
45d6a902 AM |
1967 | return FALSE; |
1968 | ||
1969 | if (skip) | |
1970 | return TRUE; | |
1971 | ||
1972 | if (override) | |
1973 | { | |
1974 | /* Here SHORTNAME is a versioned name, so we don't expect to see | |
1975 | the type of override we do in the case above unless it is | |
4cc11e76 | 1976 | overridden by a versioned definition. */ |
45d6a902 AM |
1977 | if (hi->root.type != bfd_link_hash_defined |
1978 | && hi->root.type != bfd_link_hash_defweak) | |
4eca0228 | 1979 | _bfd_error_handler |
695344c0 | 1980 | /* xgettext:c-format */ |
d003868e AM |
1981 | (_("%B: unexpected redefinition of indirect versioned symbol `%s'"), |
1982 | abfd, shortname); | |
45d6a902 AM |
1983 | } |
1984 | else | |
1985 | { | |
1986 | bh = &hi->root; | |
1987 | if (! (_bfd_generic_link_add_one_symbol | |
1988 | (info, abfd, shortname, BSF_INDIRECT, | |
268b6b39 | 1989 | bfd_ind_section_ptr, 0, name, FALSE, collect, &bh))) |
45d6a902 AM |
1990 | return FALSE; |
1991 | hi = (struct elf_link_hash_entry *) bh; | |
1992 | ||
1993 | /* If there is a duplicate definition somewhere, then HI may not | |
1994 | point to an indirect symbol. We will have reported an error | |
1995 | to the user in that case. */ | |
1996 | ||
1997 | if (hi->root.type == bfd_link_hash_indirect) | |
1998 | { | |
fcfa13d2 | 1999 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
68c88cd4 AM |
2000 | h->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; |
2001 | hi->dynamic_def |= h->dynamic_def; | |
45d6a902 AM |
2002 | |
2003 | /* See if the new flags lead us to realize that the symbol | |
2004 | must be dynamic. */ | |
2005 | if (! *dynsym) | |
2006 | { | |
2007 | if (! dynamic) | |
2008 | { | |
0e1862bb | 2009 | if (! bfd_link_executable (info) |
f5385ebf | 2010 | || hi->ref_dynamic) |
45d6a902 AM |
2011 | *dynsym = TRUE; |
2012 | } | |
2013 | else | |
2014 | { | |
f5385ebf | 2015 | if (hi->ref_regular) |
45d6a902 AM |
2016 | *dynsym = TRUE; |
2017 | } | |
2018 | } | |
2019 | } | |
2020 | } | |
2021 | ||
2022 | return TRUE; | |
2023 | } | |
2024 | \f | |
2025 | /* This routine is used to export all defined symbols into the dynamic | |
2026 | symbol table. It is called via elf_link_hash_traverse. */ | |
2027 | ||
28caa186 | 2028 | static bfd_boolean |
268b6b39 | 2029 | _bfd_elf_export_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2030 | { |
a50b1753 | 2031 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 AM |
2032 | |
2033 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
2034 | if (h->root.type == bfd_link_hash_indirect) | |
2035 | return TRUE; | |
2036 | ||
7686d77d AM |
2037 | /* Ignore this if we won't export it. */ |
2038 | if (!eif->info->export_dynamic && !h->dynamic) | |
2039 | return TRUE; | |
45d6a902 AM |
2040 | |
2041 | if (h->dynindx == -1 | |
fd91d419 L |
2042 | && (h->def_regular || h->ref_regular) |
2043 | && ! bfd_hide_sym_by_version (eif->info->version_info, | |
2044 | h->root.root.string)) | |
45d6a902 | 2045 | { |
fd91d419 | 2046 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 | 2047 | { |
fd91d419 L |
2048 | eif->failed = TRUE; |
2049 | return FALSE; | |
45d6a902 AM |
2050 | } |
2051 | } | |
2052 | ||
2053 | return TRUE; | |
2054 | } | |
2055 | \f | |
2056 | /* Look through the symbols which are defined in other shared | |
2057 | libraries and referenced here. Update the list of version | |
2058 | dependencies. This will be put into the .gnu.version_r section. | |
2059 | This function is called via elf_link_hash_traverse. */ | |
2060 | ||
28caa186 | 2061 | static bfd_boolean |
268b6b39 AM |
2062 | _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry *h, |
2063 | void *data) | |
45d6a902 | 2064 | { |
a50b1753 | 2065 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; |
45d6a902 AM |
2066 | Elf_Internal_Verneed *t; |
2067 | Elf_Internal_Vernaux *a; | |
2068 | bfd_size_type amt; | |
2069 | ||
45d6a902 AM |
2070 | /* We only care about symbols defined in shared objects with version |
2071 | information. */ | |
f5385ebf AM |
2072 | if (!h->def_dynamic |
2073 | || h->def_regular | |
45d6a902 | 2074 | || h->dynindx == -1 |
7b20f099 AM |
2075 | || h->verinfo.verdef == NULL |
2076 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
2077 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
45d6a902 AM |
2078 | return TRUE; |
2079 | ||
2080 | /* See if we already know about this version. */ | |
28caa186 AM |
2081 | for (t = elf_tdata (rinfo->info->output_bfd)->verref; |
2082 | t != NULL; | |
2083 | t = t->vn_nextref) | |
45d6a902 AM |
2084 | { |
2085 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) | |
2086 | continue; | |
2087 | ||
2088 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2089 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
2090 | return TRUE; | |
2091 | ||
2092 | break; | |
2093 | } | |
2094 | ||
2095 | /* This is a new version. Add it to tree we are building. */ | |
2096 | ||
2097 | if (t == NULL) | |
2098 | { | |
2099 | amt = sizeof *t; | |
a50b1753 | 2100 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->info->output_bfd, amt); |
45d6a902 AM |
2101 | if (t == NULL) |
2102 | { | |
2103 | rinfo->failed = TRUE; | |
2104 | return FALSE; | |
2105 | } | |
2106 | ||
2107 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
28caa186 AM |
2108 | t->vn_nextref = elf_tdata (rinfo->info->output_bfd)->verref; |
2109 | elf_tdata (rinfo->info->output_bfd)->verref = t; | |
45d6a902 AM |
2110 | } |
2111 | ||
2112 | amt = sizeof *a; | |
a50b1753 | 2113 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->info->output_bfd, amt); |
14b1c01e AM |
2114 | if (a == NULL) |
2115 | { | |
2116 | rinfo->failed = TRUE; | |
2117 | return FALSE; | |
2118 | } | |
45d6a902 AM |
2119 | |
2120 | /* Note that we are copying a string pointer here, and testing it | |
2121 | above. If bfd_elf_string_from_elf_section is ever changed to | |
2122 | discard the string data when low in memory, this will have to be | |
2123 | fixed. */ | |
2124 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
2125 | ||
2126 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
2127 | a->vna_nextptr = t->vn_auxptr; | |
2128 | ||
2129 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
2130 | ++rinfo->vers; | |
2131 | ||
2132 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
2133 | ||
2134 | t->vn_auxptr = a; | |
2135 | ||
2136 | return TRUE; | |
2137 | } | |
2138 | ||
2139 | /* Figure out appropriate versions for all the symbols. We may not | |
2140 | have the version number script until we have read all of the input | |
2141 | files, so until that point we don't know which symbols should be | |
2142 | local. This function is called via elf_link_hash_traverse. */ | |
2143 | ||
28caa186 | 2144 | static bfd_boolean |
268b6b39 | 2145 | _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2146 | { |
28caa186 | 2147 | struct elf_info_failed *sinfo; |
45d6a902 | 2148 | struct bfd_link_info *info; |
9c5bfbb7 | 2149 | const struct elf_backend_data *bed; |
45d6a902 AM |
2150 | struct elf_info_failed eif; |
2151 | char *p; | |
45d6a902 | 2152 | |
a50b1753 | 2153 | sinfo = (struct elf_info_failed *) data; |
45d6a902 AM |
2154 | info = sinfo->info; |
2155 | ||
45d6a902 AM |
2156 | /* Fix the symbol flags. */ |
2157 | eif.failed = FALSE; | |
2158 | eif.info = info; | |
2159 | if (! _bfd_elf_fix_symbol_flags (h, &eif)) | |
2160 | { | |
2161 | if (eif.failed) | |
2162 | sinfo->failed = TRUE; | |
2163 | return FALSE; | |
2164 | } | |
2165 | ||
2166 | /* We only need version numbers for symbols defined in regular | |
2167 | objects. */ | |
f5385ebf | 2168 | if (!h->def_regular) |
45d6a902 AM |
2169 | return TRUE; |
2170 | ||
28caa186 | 2171 | bed = get_elf_backend_data (info->output_bfd); |
45d6a902 AM |
2172 | p = strchr (h->root.root.string, ELF_VER_CHR); |
2173 | if (p != NULL && h->verinfo.vertree == NULL) | |
2174 | { | |
2175 | struct bfd_elf_version_tree *t; | |
45d6a902 | 2176 | |
45d6a902 AM |
2177 | ++p; |
2178 | if (*p == ELF_VER_CHR) | |
6e33951e | 2179 | ++p; |
45d6a902 AM |
2180 | |
2181 | /* If there is no version string, we can just return out. */ | |
2182 | if (*p == '\0') | |
6e33951e | 2183 | return TRUE; |
45d6a902 AM |
2184 | |
2185 | /* Look for the version. If we find it, it is no longer weak. */ | |
fd91d419 | 2186 | for (t = sinfo->info->version_info; t != NULL; t = t->next) |
45d6a902 AM |
2187 | { |
2188 | if (strcmp (t->name, p) == 0) | |
2189 | { | |
2190 | size_t len; | |
2191 | char *alc; | |
2192 | struct bfd_elf_version_expr *d; | |
2193 | ||
2194 | len = p - h->root.root.string; | |
a50b1753 | 2195 | alc = (char *) bfd_malloc (len); |
45d6a902 | 2196 | if (alc == NULL) |
14b1c01e AM |
2197 | { |
2198 | sinfo->failed = TRUE; | |
2199 | return FALSE; | |
2200 | } | |
45d6a902 AM |
2201 | memcpy (alc, h->root.root.string, len - 1); |
2202 | alc[len - 1] = '\0'; | |
2203 | if (alc[len - 2] == ELF_VER_CHR) | |
2204 | alc[len - 2] = '\0'; | |
2205 | ||
2206 | h->verinfo.vertree = t; | |
2207 | t->used = TRUE; | |
2208 | d = NULL; | |
2209 | ||
108ba305 JJ |
2210 | if (t->globals.list != NULL) |
2211 | d = (*t->match) (&t->globals, NULL, alc); | |
45d6a902 AM |
2212 | |
2213 | /* See if there is anything to force this symbol to | |
2214 | local scope. */ | |
108ba305 | 2215 | if (d == NULL && t->locals.list != NULL) |
45d6a902 | 2216 | { |
108ba305 JJ |
2217 | d = (*t->match) (&t->locals, NULL, alc); |
2218 | if (d != NULL | |
2219 | && h->dynindx != -1 | |
108ba305 JJ |
2220 | && ! info->export_dynamic) |
2221 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
45d6a902 AM |
2222 | } |
2223 | ||
2224 | free (alc); | |
2225 | break; | |
2226 | } | |
2227 | } | |
2228 | ||
2229 | /* If we are building an application, we need to create a | |
2230 | version node for this version. */ | |
0e1862bb | 2231 | if (t == NULL && bfd_link_executable (info)) |
45d6a902 AM |
2232 | { |
2233 | struct bfd_elf_version_tree **pp; | |
2234 | int version_index; | |
2235 | ||
2236 | /* If we aren't going to export this symbol, we don't need | |
2237 | to worry about it. */ | |
2238 | if (h->dynindx == -1) | |
2239 | return TRUE; | |
2240 | ||
ef53be89 AM |
2241 | t = (struct bfd_elf_version_tree *) bfd_zalloc (info->output_bfd, |
2242 | sizeof *t); | |
45d6a902 AM |
2243 | if (t == NULL) |
2244 | { | |
2245 | sinfo->failed = TRUE; | |
2246 | return FALSE; | |
2247 | } | |
2248 | ||
45d6a902 | 2249 | t->name = p; |
45d6a902 AM |
2250 | t->name_indx = (unsigned int) -1; |
2251 | t->used = TRUE; | |
2252 | ||
2253 | version_index = 1; | |
2254 | /* Don't count anonymous version tag. */ | |
fd91d419 L |
2255 | if (sinfo->info->version_info != NULL |
2256 | && sinfo->info->version_info->vernum == 0) | |
45d6a902 | 2257 | version_index = 0; |
fd91d419 L |
2258 | for (pp = &sinfo->info->version_info; |
2259 | *pp != NULL; | |
2260 | pp = &(*pp)->next) | |
45d6a902 AM |
2261 | ++version_index; |
2262 | t->vernum = version_index; | |
2263 | ||
2264 | *pp = t; | |
2265 | ||
2266 | h->verinfo.vertree = t; | |
2267 | } | |
2268 | else if (t == NULL) | |
2269 | { | |
2270 | /* We could not find the version for a symbol when | |
2271 | generating a shared archive. Return an error. */ | |
4eca0228 | 2272 | _bfd_error_handler |
695344c0 | 2273 | /* xgettext:c-format */ |
c55fe096 | 2274 | (_("%B: version node not found for symbol %s"), |
28caa186 | 2275 | info->output_bfd, h->root.root.string); |
45d6a902 AM |
2276 | bfd_set_error (bfd_error_bad_value); |
2277 | sinfo->failed = TRUE; | |
2278 | return FALSE; | |
2279 | } | |
45d6a902 AM |
2280 | } |
2281 | ||
2282 | /* If we don't have a version for this symbol, see if we can find | |
2283 | something. */ | |
fd91d419 | 2284 | if (h->verinfo.vertree == NULL && sinfo->info->version_info != NULL) |
45d6a902 | 2285 | { |
1e8fa21e | 2286 | bfd_boolean hide; |
ae5a3597 | 2287 | |
fd91d419 L |
2288 | h->verinfo.vertree |
2289 | = bfd_find_version_for_sym (sinfo->info->version_info, | |
2290 | h->root.root.string, &hide); | |
1e8fa21e AM |
2291 | if (h->verinfo.vertree != NULL && hide) |
2292 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
45d6a902 AM |
2293 | } |
2294 | ||
2295 | return TRUE; | |
2296 | } | |
2297 | \f | |
45d6a902 AM |
2298 | /* Read and swap the relocs from the section indicated by SHDR. This |
2299 | may be either a REL or a RELA section. The relocations are | |
2300 | translated into RELA relocations and stored in INTERNAL_RELOCS, | |
2301 | which should have already been allocated to contain enough space. | |
2302 | The EXTERNAL_RELOCS are a buffer where the external form of the | |
2303 | relocations should be stored. | |
2304 | ||
2305 | Returns FALSE if something goes wrong. */ | |
2306 | ||
2307 | static bfd_boolean | |
268b6b39 | 2308 | elf_link_read_relocs_from_section (bfd *abfd, |
243ef1e0 | 2309 | asection *sec, |
268b6b39 AM |
2310 | Elf_Internal_Shdr *shdr, |
2311 | void *external_relocs, | |
2312 | Elf_Internal_Rela *internal_relocs) | |
45d6a902 | 2313 | { |
9c5bfbb7 | 2314 | const struct elf_backend_data *bed; |
268b6b39 | 2315 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
45d6a902 AM |
2316 | const bfd_byte *erela; |
2317 | const bfd_byte *erelaend; | |
2318 | Elf_Internal_Rela *irela; | |
243ef1e0 L |
2319 | Elf_Internal_Shdr *symtab_hdr; |
2320 | size_t nsyms; | |
45d6a902 | 2321 | |
45d6a902 AM |
2322 | /* Position ourselves at the start of the section. */ |
2323 | if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0) | |
2324 | return FALSE; | |
2325 | ||
2326 | /* Read the relocations. */ | |
2327 | if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size) | |
2328 | return FALSE; | |
2329 | ||
243ef1e0 | 2330 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
ce98a316 | 2331 | nsyms = NUM_SHDR_ENTRIES (symtab_hdr); |
243ef1e0 | 2332 | |
45d6a902 AM |
2333 | bed = get_elf_backend_data (abfd); |
2334 | ||
2335 | /* Convert the external relocations to the internal format. */ | |
2336 | if (shdr->sh_entsize == bed->s->sizeof_rel) | |
2337 | swap_in = bed->s->swap_reloc_in; | |
2338 | else if (shdr->sh_entsize == bed->s->sizeof_rela) | |
2339 | swap_in = bed->s->swap_reloca_in; | |
2340 | else | |
2341 | { | |
2342 | bfd_set_error (bfd_error_wrong_format); | |
2343 | return FALSE; | |
2344 | } | |
2345 | ||
a50b1753 | 2346 | erela = (const bfd_byte *) external_relocs; |
51992aec | 2347 | erelaend = erela + shdr->sh_size; |
45d6a902 AM |
2348 | irela = internal_relocs; |
2349 | while (erela < erelaend) | |
2350 | { | |
243ef1e0 L |
2351 | bfd_vma r_symndx; |
2352 | ||
45d6a902 | 2353 | (*swap_in) (abfd, erela, irela); |
243ef1e0 L |
2354 | r_symndx = ELF32_R_SYM (irela->r_info); |
2355 | if (bed->s->arch_size == 64) | |
2356 | r_symndx >>= 24; | |
ce98a316 NC |
2357 | if (nsyms > 0) |
2358 | { | |
2359 | if ((size_t) r_symndx >= nsyms) | |
2360 | { | |
4eca0228 | 2361 | _bfd_error_handler |
695344c0 | 2362 | /* xgettext:c-format */ |
ce98a316 NC |
2363 | (_("%B: bad reloc symbol index (0x%lx >= 0x%lx)" |
2364 | " for offset 0x%lx in section `%A'"), | |
2365 | abfd, sec, | |
2366 | (unsigned long) r_symndx, (unsigned long) nsyms, irela->r_offset); | |
2367 | bfd_set_error (bfd_error_bad_value); | |
2368 | return FALSE; | |
2369 | } | |
2370 | } | |
cf35638d | 2371 | else if (r_symndx != STN_UNDEF) |
243ef1e0 | 2372 | { |
4eca0228 | 2373 | _bfd_error_handler |
695344c0 | 2374 | /* xgettext:c-format */ |
ce98a316 NC |
2375 | (_("%B: non-zero symbol index (0x%lx) for offset 0x%lx in section `%A'" |
2376 | " when the object file has no symbol table"), | |
d003868e AM |
2377 | abfd, sec, |
2378 | (unsigned long) r_symndx, (unsigned long) nsyms, irela->r_offset); | |
243ef1e0 L |
2379 | bfd_set_error (bfd_error_bad_value); |
2380 | return FALSE; | |
2381 | } | |
45d6a902 AM |
2382 | irela += bed->s->int_rels_per_ext_rel; |
2383 | erela += shdr->sh_entsize; | |
2384 | } | |
2385 | ||
2386 | return TRUE; | |
2387 | } | |
2388 | ||
2389 | /* Read and swap the relocs for a section O. They may have been | |
2390 | cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are | |
2391 | not NULL, they are used as buffers to read into. They are known to | |
2392 | be large enough. If the INTERNAL_RELOCS relocs argument is NULL, | |
2393 | the return value is allocated using either malloc or bfd_alloc, | |
2394 | according to the KEEP_MEMORY argument. If O has two relocation | |
2395 | sections (both REL and RELA relocations), then the REL_HDR | |
2396 | relocations will appear first in INTERNAL_RELOCS, followed by the | |
d4730f92 | 2397 | RELA_HDR relocations. */ |
45d6a902 AM |
2398 | |
2399 | Elf_Internal_Rela * | |
268b6b39 AM |
2400 | _bfd_elf_link_read_relocs (bfd *abfd, |
2401 | asection *o, | |
2402 | void *external_relocs, | |
2403 | Elf_Internal_Rela *internal_relocs, | |
2404 | bfd_boolean keep_memory) | |
45d6a902 | 2405 | { |
268b6b39 | 2406 | void *alloc1 = NULL; |
45d6a902 | 2407 | Elf_Internal_Rela *alloc2 = NULL; |
9c5bfbb7 | 2408 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
d4730f92 BS |
2409 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
2410 | Elf_Internal_Rela *internal_rela_relocs; | |
45d6a902 | 2411 | |
d4730f92 BS |
2412 | if (esdo->relocs != NULL) |
2413 | return esdo->relocs; | |
45d6a902 AM |
2414 | |
2415 | if (o->reloc_count == 0) | |
2416 | return NULL; | |
2417 | ||
45d6a902 AM |
2418 | if (internal_relocs == NULL) |
2419 | { | |
2420 | bfd_size_type size; | |
2421 | ||
2422 | size = o->reloc_count; | |
2423 | size *= bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rela); | |
2424 | if (keep_memory) | |
a50b1753 | 2425 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_alloc (abfd, size); |
45d6a902 | 2426 | else |
a50b1753 | 2427 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); |
45d6a902 AM |
2428 | if (internal_relocs == NULL) |
2429 | goto error_return; | |
2430 | } | |
2431 | ||
2432 | if (external_relocs == NULL) | |
2433 | { | |
d4730f92 BS |
2434 | bfd_size_type size = 0; |
2435 | ||
2436 | if (esdo->rel.hdr) | |
2437 | size += esdo->rel.hdr->sh_size; | |
2438 | if (esdo->rela.hdr) | |
2439 | size += esdo->rela.hdr->sh_size; | |
45d6a902 | 2440 | |
268b6b39 | 2441 | alloc1 = bfd_malloc (size); |
45d6a902 AM |
2442 | if (alloc1 == NULL) |
2443 | goto error_return; | |
2444 | external_relocs = alloc1; | |
2445 | } | |
2446 | ||
d4730f92 BS |
2447 | internal_rela_relocs = internal_relocs; |
2448 | if (esdo->rel.hdr) | |
2449 | { | |
2450 | if (!elf_link_read_relocs_from_section (abfd, o, esdo->rel.hdr, | |
2451 | external_relocs, | |
2452 | internal_relocs)) | |
2453 | goto error_return; | |
2454 | external_relocs = (((bfd_byte *) external_relocs) | |
2455 | + esdo->rel.hdr->sh_size); | |
2456 | internal_rela_relocs += (NUM_SHDR_ENTRIES (esdo->rel.hdr) | |
2457 | * bed->s->int_rels_per_ext_rel); | |
2458 | } | |
2459 | ||
2460 | if (esdo->rela.hdr | |
2461 | && (!elf_link_read_relocs_from_section (abfd, o, esdo->rela.hdr, | |
2462 | external_relocs, | |
2463 | internal_rela_relocs))) | |
45d6a902 AM |
2464 | goto error_return; |
2465 | ||
2466 | /* Cache the results for next time, if we can. */ | |
2467 | if (keep_memory) | |
d4730f92 | 2468 | esdo->relocs = internal_relocs; |
45d6a902 AM |
2469 | |
2470 | if (alloc1 != NULL) | |
2471 | free (alloc1); | |
2472 | ||
2473 | /* Don't free alloc2, since if it was allocated we are passing it | |
2474 | back (under the name of internal_relocs). */ | |
2475 | ||
2476 | return internal_relocs; | |
2477 | ||
2478 | error_return: | |
2479 | if (alloc1 != NULL) | |
2480 | free (alloc1); | |
2481 | if (alloc2 != NULL) | |
4dd07732 AM |
2482 | { |
2483 | if (keep_memory) | |
2484 | bfd_release (abfd, alloc2); | |
2485 | else | |
2486 | free (alloc2); | |
2487 | } | |
45d6a902 AM |
2488 | return NULL; |
2489 | } | |
2490 | ||
2491 | /* Compute the size of, and allocate space for, REL_HDR which is the | |
2492 | section header for a section containing relocations for O. */ | |
2493 | ||
28caa186 | 2494 | static bfd_boolean |
9eaff861 AO |
2495 | _bfd_elf_link_size_reloc_section (bfd *abfd, |
2496 | struct bfd_elf_section_reloc_data *reldata) | |
45d6a902 | 2497 | { |
9eaff861 | 2498 | Elf_Internal_Shdr *rel_hdr = reldata->hdr; |
45d6a902 AM |
2499 | |
2500 | /* That allows us to calculate the size of the section. */ | |
9eaff861 | 2501 | rel_hdr->sh_size = rel_hdr->sh_entsize * reldata->count; |
45d6a902 AM |
2502 | |
2503 | /* The contents field must last into write_object_contents, so we | |
2504 | allocate it with bfd_alloc rather than malloc. Also since we | |
2505 | cannot be sure that the contents will actually be filled in, | |
2506 | we zero the allocated space. */ | |
a50b1753 | 2507 | rel_hdr->contents = (unsigned char *) bfd_zalloc (abfd, rel_hdr->sh_size); |
45d6a902 AM |
2508 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) |
2509 | return FALSE; | |
2510 | ||
d4730f92 | 2511 | if (reldata->hashes == NULL && reldata->count) |
45d6a902 AM |
2512 | { |
2513 | struct elf_link_hash_entry **p; | |
2514 | ||
ca4be51c AM |
2515 | p = ((struct elf_link_hash_entry **) |
2516 | bfd_zmalloc (reldata->count * sizeof (*p))); | |
45d6a902 AM |
2517 | if (p == NULL) |
2518 | return FALSE; | |
2519 | ||
d4730f92 | 2520 | reldata->hashes = p; |
45d6a902 AM |
2521 | } |
2522 | ||
2523 | return TRUE; | |
2524 | } | |
2525 | ||
2526 | /* Copy the relocations indicated by the INTERNAL_RELOCS (which | |
2527 | originated from the section given by INPUT_REL_HDR) to the | |
2528 | OUTPUT_BFD. */ | |
2529 | ||
2530 | bfd_boolean | |
268b6b39 AM |
2531 | _bfd_elf_link_output_relocs (bfd *output_bfd, |
2532 | asection *input_section, | |
2533 | Elf_Internal_Shdr *input_rel_hdr, | |
eac338cf PB |
2534 | Elf_Internal_Rela *internal_relocs, |
2535 | struct elf_link_hash_entry **rel_hash | |
2536 | ATTRIBUTE_UNUSED) | |
45d6a902 AM |
2537 | { |
2538 | Elf_Internal_Rela *irela; | |
2539 | Elf_Internal_Rela *irelaend; | |
2540 | bfd_byte *erel; | |
d4730f92 | 2541 | struct bfd_elf_section_reloc_data *output_reldata; |
45d6a902 | 2542 | asection *output_section; |
9c5bfbb7 | 2543 | const struct elf_backend_data *bed; |
268b6b39 | 2544 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
d4730f92 | 2545 | struct bfd_elf_section_data *esdo; |
45d6a902 AM |
2546 | |
2547 | output_section = input_section->output_section; | |
45d6a902 | 2548 | |
d4730f92 BS |
2549 | bed = get_elf_backend_data (output_bfd); |
2550 | esdo = elf_section_data (output_section); | |
2551 | if (esdo->rel.hdr && esdo->rel.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2552 | { |
d4730f92 BS |
2553 | output_reldata = &esdo->rel; |
2554 | swap_out = bed->s->swap_reloc_out; | |
45d6a902 | 2555 | } |
d4730f92 BS |
2556 | else if (esdo->rela.hdr |
2557 | && esdo->rela.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2558 | { |
d4730f92 BS |
2559 | output_reldata = &esdo->rela; |
2560 | swap_out = bed->s->swap_reloca_out; | |
45d6a902 AM |
2561 | } |
2562 | else | |
2563 | { | |
4eca0228 | 2564 | _bfd_error_handler |
695344c0 | 2565 | /* xgettext:c-format */ |
d003868e AM |
2566 | (_("%B: relocation size mismatch in %B section %A"), |
2567 | output_bfd, input_section->owner, input_section); | |
297d8443 | 2568 | bfd_set_error (bfd_error_wrong_format); |
45d6a902 AM |
2569 | return FALSE; |
2570 | } | |
2571 | ||
d4730f92 BS |
2572 | erel = output_reldata->hdr->contents; |
2573 | erel += output_reldata->count * input_rel_hdr->sh_entsize; | |
45d6a902 AM |
2574 | irela = internal_relocs; |
2575 | irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) | |
2576 | * bed->s->int_rels_per_ext_rel); | |
2577 | while (irela < irelaend) | |
2578 | { | |
2579 | (*swap_out) (output_bfd, irela, erel); | |
2580 | irela += bed->s->int_rels_per_ext_rel; | |
2581 | erel += input_rel_hdr->sh_entsize; | |
2582 | } | |
2583 | ||
2584 | /* Bump the counter, so that we know where to add the next set of | |
2585 | relocations. */ | |
d4730f92 | 2586 | output_reldata->count += NUM_SHDR_ENTRIES (input_rel_hdr); |
45d6a902 AM |
2587 | |
2588 | return TRUE; | |
2589 | } | |
2590 | \f | |
508c3946 L |
2591 | /* Make weak undefined symbols in PIE dynamic. */ |
2592 | ||
2593 | bfd_boolean | |
2594 | _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info *info, | |
2595 | struct elf_link_hash_entry *h) | |
2596 | { | |
0e1862bb | 2597 | if (bfd_link_pie (info) |
508c3946 L |
2598 | && h->dynindx == -1 |
2599 | && h->root.type == bfd_link_hash_undefweak) | |
2600 | return bfd_elf_link_record_dynamic_symbol (info, h); | |
2601 | ||
2602 | return TRUE; | |
2603 | } | |
2604 | ||
45d6a902 AM |
2605 | /* Fix up the flags for a symbol. This handles various cases which |
2606 | can only be fixed after all the input files are seen. This is | |
2607 | currently called by both adjust_dynamic_symbol and | |
2608 | assign_sym_version, which is unnecessary but perhaps more robust in | |
2609 | the face of future changes. */ | |
2610 | ||
28caa186 | 2611 | static bfd_boolean |
268b6b39 AM |
2612 | _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry *h, |
2613 | struct elf_info_failed *eif) | |
45d6a902 | 2614 | { |
33774f08 | 2615 | const struct elf_backend_data *bed; |
508c3946 | 2616 | |
45d6a902 AM |
2617 | /* If this symbol was mentioned in a non-ELF file, try to set |
2618 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
2619 | permit a non-ELF file to correctly refer to a symbol defined in | |
2620 | an ELF dynamic object. */ | |
f5385ebf | 2621 | if (h->non_elf) |
45d6a902 AM |
2622 | { |
2623 | while (h->root.type == bfd_link_hash_indirect) | |
2624 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2625 | ||
2626 | if (h->root.type != bfd_link_hash_defined | |
2627 | && h->root.type != bfd_link_hash_defweak) | |
f5385ebf AM |
2628 | { |
2629 | h->ref_regular = 1; | |
2630 | h->ref_regular_nonweak = 1; | |
2631 | } | |
45d6a902 AM |
2632 | else |
2633 | { | |
2634 | if (h->root.u.def.section->owner != NULL | |
2635 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
2636 | == bfd_target_elf_flavour)) | |
f5385ebf AM |
2637 | { |
2638 | h->ref_regular = 1; | |
2639 | h->ref_regular_nonweak = 1; | |
2640 | } | |
45d6a902 | 2641 | else |
f5385ebf | 2642 | h->def_regular = 1; |
45d6a902 AM |
2643 | } |
2644 | ||
2645 | if (h->dynindx == -1 | |
f5385ebf AM |
2646 | && (h->def_dynamic |
2647 | || h->ref_dynamic)) | |
45d6a902 | 2648 | { |
c152c796 | 2649 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 AM |
2650 | { |
2651 | eif->failed = TRUE; | |
2652 | return FALSE; | |
2653 | } | |
2654 | } | |
2655 | } | |
2656 | else | |
2657 | { | |
f5385ebf | 2658 | /* Unfortunately, NON_ELF is only correct if the symbol |
45d6a902 AM |
2659 | was first seen in a non-ELF file. Fortunately, if the symbol |
2660 | was first seen in an ELF file, we're probably OK unless the | |
2661 | symbol was defined in a non-ELF file. Catch that case here. | |
2662 | FIXME: We're still in trouble if the symbol was first seen in | |
2663 | a dynamic object, and then later in a non-ELF regular object. */ | |
2664 | if ((h->root.type == bfd_link_hash_defined | |
2665 | || h->root.type == bfd_link_hash_defweak) | |
f5385ebf | 2666 | && !h->def_regular |
45d6a902 AM |
2667 | && (h->root.u.def.section->owner != NULL |
2668 | ? (bfd_get_flavour (h->root.u.def.section->owner) | |
2669 | != bfd_target_elf_flavour) | |
2670 | : (bfd_is_abs_section (h->root.u.def.section) | |
f5385ebf AM |
2671 | && !h->def_dynamic))) |
2672 | h->def_regular = 1; | |
45d6a902 AM |
2673 | } |
2674 | ||
508c3946 | 2675 | /* Backend specific symbol fixup. */ |
33774f08 AM |
2676 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); |
2677 | if (bed->elf_backend_fixup_symbol | |
2678 | && !(*bed->elf_backend_fixup_symbol) (eif->info, h)) | |
2679 | return FALSE; | |
508c3946 | 2680 | |
45d6a902 AM |
2681 | /* If this is a final link, and the symbol was defined as a common |
2682 | symbol in a regular object file, and there was no definition in | |
2683 | any dynamic object, then the linker will have allocated space for | |
f5385ebf | 2684 | the symbol in a common section but the DEF_REGULAR |
45d6a902 AM |
2685 | flag will not have been set. */ |
2686 | if (h->root.type == bfd_link_hash_defined | |
f5385ebf AM |
2687 | && !h->def_regular |
2688 | && h->ref_regular | |
2689 | && !h->def_dynamic | |
96f29d96 | 2690 | && (h->root.u.def.section->owner->flags & (DYNAMIC | BFD_PLUGIN)) == 0) |
f5385ebf | 2691 | h->def_regular = 1; |
45d6a902 | 2692 | |
4deb8f71 L |
2693 | /* If a weak undefined symbol has non-default visibility, we also |
2694 | hide it from the dynamic linker. */ | |
2695 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2696 | && h->root.type == bfd_link_hash_undefweak) | |
2697 | (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE); | |
2698 | ||
2699 | /* A hidden versioned symbol in executable should be forced local if | |
2700 | it is is locally defined, not referenced by shared library and not | |
2701 | exported. */ | |
2702 | else if (bfd_link_executable (eif->info) | |
2703 | && h->versioned == versioned_hidden | |
2704 | && !eif->info->export_dynamic | |
2705 | && !h->dynamic | |
2706 | && !h->ref_dynamic | |
2707 | && h->def_regular) | |
2708 | (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE); | |
2709 | ||
45d6a902 AM |
2710 | /* If -Bsymbolic was used (which means to bind references to global |
2711 | symbols to the definition within the shared object), and this | |
2712 | symbol was defined in a regular object, then it actually doesn't | |
9c7a29a3 AM |
2713 | need a PLT entry. Likewise, if the symbol has non-default |
2714 | visibility. If the symbol has hidden or internal visibility, we | |
c1be741f | 2715 | will force it local. */ |
4deb8f71 L |
2716 | else if (h->needs_plt |
2717 | && bfd_link_pic (eif->info) | |
2718 | && is_elf_hash_table (eif->info->hash) | |
2719 | && (SYMBOLIC_BIND (eif->info, h) | |
2720 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2721 | && h->def_regular) | |
45d6a902 | 2722 | { |
45d6a902 AM |
2723 | bfd_boolean force_local; |
2724 | ||
45d6a902 AM |
2725 | force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL |
2726 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN); | |
2727 | (*bed->elf_backend_hide_symbol) (eif->info, h, force_local); | |
2728 | } | |
2729 | ||
45d6a902 AM |
2730 | /* If this is a weak defined symbol in a dynamic object, and we know |
2731 | the real definition in the dynamic object, copy interesting flags | |
2732 | over to the real definition. */ | |
f6e332e6 | 2733 | if (h->u.weakdef != NULL) |
45d6a902 | 2734 | { |
45d6a902 AM |
2735 | /* If the real definition is defined by a regular object file, |
2736 | don't do anything special. See the longer description in | |
2737 | _bfd_elf_adjust_dynamic_symbol, below. */ | |
4e6b54a6 | 2738 | if (h->u.weakdef->def_regular) |
f6e332e6 | 2739 | h->u.weakdef = NULL; |
45d6a902 | 2740 | else |
a26587ba | 2741 | { |
4e6b54a6 AM |
2742 | struct elf_link_hash_entry *weakdef = h->u.weakdef; |
2743 | ||
2744 | while (h->root.type == bfd_link_hash_indirect) | |
2745 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2746 | ||
2747 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
2748 | || h->root.type == bfd_link_hash_defweak); | |
2749 | BFD_ASSERT (weakdef->def_dynamic); | |
a26587ba RS |
2750 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined |
2751 | || weakdef->root.type == bfd_link_hash_defweak); | |
2752 | (*bed->elf_backend_copy_indirect_symbol) (eif->info, weakdef, h); | |
2753 | } | |
45d6a902 AM |
2754 | } |
2755 | ||
2756 | return TRUE; | |
2757 | } | |
2758 | ||
2759 | /* Make the backend pick a good value for a dynamic symbol. This is | |
2760 | called via elf_link_hash_traverse, and also calls itself | |
2761 | recursively. */ | |
2762 | ||
28caa186 | 2763 | static bfd_boolean |
268b6b39 | 2764 | _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2765 | { |
a50b1753 | 2766 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 | 2767 | bfd *dynobj; |
9c5bfbb7 | 2768 | const struct elf_backend_data *bed; |
45d6a902 | 2769 | |
0eddce27 | 2770 | if (! is_elf_hash_table (eif->info->hash)) |
45d6a902 AM |
2771 | return FALSE; |
2772 | ||
45d6a902 AM |
2773 | /* Ignore indirect symbols. These are added by the versioning code. */ |
2774 | if (h->root.type == bfd_link_hash_indirect) | |
2775 | return TRUE; | |
2776 | ||
2777 | /* Fix the symbol flags. */ | |
2778 | if (! _bfd_elf_fix_symbol_flags (h, eif)) | |
2779 | return FALSE; | |
2780 | ||
2781 | /* If this symbol does not require a PLT entry, and it is not | |
2782 | defined by a dynamic object, or is not referenced by a regular | |
2783 | object, ignore it. We do have to handle a weak defined symbol, | |
2784 | even if no regular object refers to it, if we decided to add it | |
2785 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
2786 | about symbols which are defined by one dynamic object and | |
2787 | referenced by another one? */ | |
f5385ebf | 2788 | if (!h->needs_plt |
91e21fb7 | 2789 | && h->type != STT_GNU_IFUNC |
f5385ebf AM |
2790 | && (h->def_regular |
2791 | || !h->def_dynamic | |
2792 | || (!h->ref_regular | |
f6e332e6 | 2793 | && (h->u.weakdef == NULL || h->u.weakdef->dynindx == -1)))) |
45d6a902 | 2794 | { |
a6aa5195 | 2795 | h->plt = elf_hash_table (eif->info)->init_plt_offset; |
45d6a902 AM |
2796 | return TRUE; |
2797 | } | |
2798 | ||
2799 | /* If we've already adjusted this symbol, don't do it again. This | |
2800 | can happen via a recursive call. */ | |
f5385ebf | 2801 | if (h->dynamic_adjusted) |
45d6a902 AM |
2802 | return TRUE; |
2803 | ||
2804 | /* Don't look at this symbol again. Note that we must set this | |
2805 | after checking the above conditions, because we may look at a | |
2806 | symbol once, decide not to do anything, and then get called | |
2807 | recursively later after REF_REGULAR is set below. */ | |
f5385ebf | 2808 | h->dynamic_adjusted = 1; |
45d6a902 AM |
2809 | |
2810 | /* If this is a weak definition, and we know a real definition, and | |
2811 | the real symbol is not itself defined by a regular object file, | |
2812 | then get a good value for the real definition. We handle the | |
2813 | real symbol first, for the convenience of the backend routine. | |
2814 | ||
2815 | Note that there is a confusing case here. If the real definition | |
2816 | is defined by a regular object file, we don't get the real symbol | |
2817 | from the dynamic object, but we do get the weak symbol. If the | |
2818 | processor backend uses a COPY reloc, then if some routine in the | |
2819 | dynamic object changes the real symbol, we will not see that | |
2820 | change in the corresponding weak symbol. This is the way other | |
2821 | ELF linkers work as well, and seems to be a result of the shared | |
2822 | library model. | |
2823 | ||
2824 | I will clarify this issue. Most SVR4 shared libraries define the | |
2825 | variable _timezone and define timezone as a weak synonym. The | |
2826 | tzset call changes _timezone. If you write | |
2827 | extern int timezone; | |
2828 | int _timezone = 5; | |
2829 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
2830 | you might expect that, since timezone is a synonym for _timezone, | |
2831 | the same number will print both times. However, if the processor | |
2832 | backend uses a COPY reloc, then actually timezone will be copied | |
2833 | into your process image, and, since you define _timezone | |
2834 | yourself, _timezone will not. Thus timezone and _timezone will | |
2835 | wind up at different memory locations. The tzset call will set | |
2836 | _timezone, leaving timezone unchanged. */ | |
2837 | ||
f6e332e6 | 2838 | if (h->u.weakdef != NULL) |
45d6a902 | 2839 | { |
ec24dc88 AM |
2840 | /* If we get to this point, there is an implicit reference to |
2841 | H->U.WEAKDEF by a regular object file via the weak symbol H. */ | |
f6e332e6 | 2842 | h->u.weakdef->ref_regular = 1; |
45d6a902 | 2843 | |
ec24dc88 AM |
2844 | /* Ensure that the backend adjust_dynamic_symbol function sees |
2845 | H->U.WEAKDEF before H by recursively calling ourselves. */ | |
f6e332e6 | 2846 | if (! _bfd_elf_adjust_dynamic_symbol (h->u.weakdef, eif)) |
45d6a902 AM |
2847 | return FALSE; |
2848 | } | |
2849 | ||
2850 | /* If a symbol has no type and no size and does not require a PLT | |
2851 | entry, then we are probably about to do the wrong thing here: we | |
2852 | are probably going to create a COPY reloc for an empty object. | |
2853 | This case can arise when a shared object is built with assembly | |
2854 | code, and the assembly code fails to set the symbol type. */ | |
2855 | if (h->size == 0 | |
2856 | && h->type == STT_NOTYPE | |
f5385ebf | 2857 | && !h->needs_plt) |
4eca0228 | 2858 | _bfd_error_handler |
45d6a902 AM |
2859 | (_("warning: type and size of dynamic symbol `%s' are not defined"), |
2860 | h->root.root.string); | |
2861 | ||
2862 | dynobj = elf_hash_table (eif->info)->dynobj; | |
2863 | bed = get_elf_backend_data (dynobj); | |
e7c33416 | 2864 | |
45d6a902 AM |
2865 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) |
2866 | { | |
2867 | eif->failed = TRUE; | |
2868 | return FALSE; | |
2869 | } | |
2870 | ||
2871 | return TRUE; | |
2872 | } | |
2873 | ||
027297b7 L |
2874 | /* Adjust the dynamic symbol, H, for copy in the dynamic bss section, |
2875 | DYNBSS. */ | |
2876 | ||
2877 | bfd_boolean | |
6cabe1ea AM |
2878 | _bfd_elf_adjust_dynamic_copy (struct bfd_link_info *info, |
2879 | struct elf_link_hash_entry *h, | |
027297b7 L |
2880 | asection *dynbss) |
2881 | { | |
91ac5911 | 2882 | unsigned int power_of_two; |
027297b7 L |
2883 | bfd_vma mask; |
2884 | asection *sec = h->root.u.def.section; | |
2885 | ||
2886 | /* The section aligment of definition is the maximum alignment | |
91ac5911 L |
2887 | requirement of symbols defined in the section. Since we don't |
2888 | know the symbol alignment requirement, we start with the | |
2889 | maximum alignment and check low bits of the symbol address | |
2890 | for the minimum alignment. */ | |
2891 | power_of_two = bfd_get_section_alignment (sec->owner, sec); | |
2892 | mask = ((bfd_vma) 1 << power_of_two) - 1; | |
2893 | while ((h->root.u.def.value & mask) != 0) | |
2894 | { | |
2895 | mask >>= 1; | |
2896 | --power_of_two; | |
2897 | } | |
027297b7 | 2898 | |
91ac5911 L |
2899 | if (power_of_two > bfd_get_section_alignment (dynbss->owner, |
2900 | dynbss)) | |
027297b7 L |
2901 | { |
2902 | /* Adjust the section alignment if needed. */ | |
2903 | if (! bfd_set_section_alignment (dynbss->owner, dynbss, | |
91ac5911 | 2904 | power_of_two)) |
027297b7 L |
2905 | return FALSE; |
2906 | } | |
2907 | ||
91ac5911 | 2908 | /* We make sure that the symbol will be aligned properly. */ |
027297b7 L |
2909 | dynbss->size = BFD_ALIGN (dynbss->size, mask + 1); |
2910 | ||
2911 | /* Define the symbol as being at this point in DYNBSS. */ | |
2912 | h->root.u.def.section = dynbss; | |
2913 | h->root.u.def.value = dynbss->size; | |
2914 | ||
2915 | /* Increment the size of DYNBSS to make room for the symbol. */ | |
2916 | dynbss->size += h->size; | |
2917 | ||
f7483970 L |
2918 | /* No error if extern_protected_data is true. */ |
2919 | if (h->protected_def | |
889c2a67 L |
2920 | && (!info->extern_protected_data |
2921 | || (info->extern_protected_data < 0 | |
2922 | && !get_elf_backend_data (dynbss->owner)->extern_protected_data))) | |
d07a1b05 AM |
2923 | info->callbacks->einfo |
2924 | (_("%P: copy reloc against protected `%T' is dangerous\n"), | |
2925 | h->root.root.string); | |
6cabe1ea | 2926 | |
027297b7 L |
2927 | return TRUE; |
2928 | } | |
2929 | ||
45d6a902 AM |
2930 | /* Adjust all external symbols pointing into SEC_MERGE sections |
2931 | to reflect the object merging within the sections. */ | |
2932 | ||
28caa186 | 2933 | static bfd_boolean |
268b6b39 | 2934 | _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry *h, void *data) |
45d6a902 AM |
2935 | { |
2936 | asection *sec; | |
2937 | ||
45d6a902 AM |
2938 | if ((h->root.type == bfd_link_hash_defined |
2939 | || h->root.type == bfd_link_hash_defweak) | |
2940 | && ((sec = h->root.u.def.section)->flags & SEC_MERGE) | |
dbaa2011 | 2941 | && sec->sec_info_type == SEC_INFO_TYPE_MERGE) |
45d6a902 | 2942 | { |
a50b1753 | 2943 | bfd *output_bfd = (bfd *) data; |
45d6a902 AM |
2944 | |
2945 | h->root.u.def.value = | |
2946 | _bfd_merged_section_offset (output_bfd, | |
2947 | &h->root.u.def.section, | |
2948 | elf_section_data (sec)->sec_info, | |
753731ee | 2949 | h->root.u.def.value); |
45d6a902 AM |
2950 | } |
2951 | ||
2952 | return TRUE; | |
2953 | } | |
986a241f RH |
2954 | |
2955 | /* Returns false if the symbol referred to by H should be considered | |
2956 | to resolve local to the current module, and true if it should be | |
2957 | considered to bind dynamically. */ | |
2958 | ||
2959 | bfd_boolean | |
268b6b39 AM |
2960 | _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, |
2961 | struct bfd_link_info *info, | |
89a2ee5a | 2962 | bfd_boolean not_local_protected) |
986a241f RH |
2963 | { |
2964 | bfd_boolean binding_stays_local_p; | |
fcb93ecf PB |
2965 | const struct elf_backend_data *bed; |
2966 | struct elf_link_hash_table *hash_table; | |
986a241f RH |
2967 | |
2968 | if (h == NULL) | |
2969 | return FALSE; | |
2970 | ||
2971 | while (h->root.type == bfd_link_hash_indirect | |
2972 | || h->root.type == bfd_link_hash_warning) | |
2973 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2974 | ||
2975 | /* If it was forced local, then clearly it's not dynamic. */ | |
2976 | if (h->dynindx == -1) | |
2977 | return FALSE; | |
f5385ebf | 2978 | if (h->forced_local) |
986a241f RH |
2979 | return FALSE; |
2980 | ||
2981 | /* Identify the cases where name binding rules say that a | |
2982 | visible symbol resolves locally. */ | |
0e1862bb L |
2983 | binding_stays_local_p = (bfd_link_executable (info) |
2984 | || SYMBOLIC_BIND (info, h)); | |
986a241f RH |
2985 | |
2986 | switch (ELF_ST_VISIBILITY (h->other)) | |
2987 | { | |
2988 | case STV_INTERNAL: | |
2989 | case STV_HIDDEN: | |
2990 | return FALSE; | |
2991 | ||
2992 | case STV_PROTECTED: | |
fcb93ecf PB |
2993 | hash_table = elf_hash_table (info); |
2994 | if (!is_elf_hash_table (hash_table)) | |
2995 | return FALSE; | |
2996 | ||
2997 | bed = get_elf_backend_data (hash_table->dynobj); | |
2998 | ||
986a241f RH |
2999 | /* Proper resolution for function pointer equality may require |
3000 | that these symbols perhaps be resolved dynamically, even though | |
3001 | we should be resolving them to the current module. */ | |
89a2ee5a | 3002 | if (!not_local_protected || !bed->is_function_type (h->type)) |
986a241f RH |
3003 | binding_stays_local_p = TRUE; |
3004 | break; | |
3005 | ||
3006 | default: | |
986a241f RH |
3007 | break; |
3008 | } | |
3009 | ||
aa37626c | 3010 | /* If it isn't defined locally, then clearly it's dynamic. */ |
89a2ee5a | 3011 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
aa37626c L |
3012 | return TRUE; |
3013 | ||
986a241f RH |
3014 | /* Otherwise, the symbol is dynamic if binding rules don't tell |
3015 | us that it remains local. */ | |
3016 | return !binding_stays_local_p; | |
3017 | } | |
f6c52c13 AM |
3018 | |
3019 | /* Return true if the symbol referred to by H should be considered | |
3020 | to resolve local to the current module, and false otherwise. Differs | |
3021 | from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of | |
2e76e85a | 3022 | undefined symbols. The two functions are virtually identical except |
89a2ee5a AM |
3023 | for the place where forced_local and dynindx == -1 are tested. If |
3024 | either of those tests are true, _bfd_elf_dynamic_symbol_p will say | |
3025 | the symbol is local, while _bfd_elf_symbol_refs_local_p will say | |
3026 | the symbol is local only for defined symbols. | |
3027 | It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as | |
3028 | !_bfd_elf_symbol_refs_local_p, except that targets differ in their | |
3029 | treatment of undefined weak symbols. For those that do not make | |
3030 | undefined weak symbols dynamic, both functions may return false. */ | |
f6c52c13 AM |
3031 | |
3032 | bfd_boolean | |
268b6b39 AM |
3033 | _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry *h, |
3034 | struct bfd_link_info *info, | |
3035 | bfd_boolean local_protected) | |
f6c52c13 | 3036 | { |
fcb93ecf PB |
3037 | const struct elf_backend_data *bed; |
3038 | struct elf_link_hash_table *hash_table; | |
3039 | ||
f6c52c13 AM |
3040 | /* If it's a local sym, of course we resolve locally. */ |
3041 | if (h == NULL) | |
3042 | return TRUE; | |
3043 | ||
d95edcac L |
3044 | /* STV_HIDDEN or STV_INTERNAL ones must be local. */ |
3045 | if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
3046 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
3047 | return TRUE; | |
3048 | ||
7e2294f9 AO |
3049 | /* Common symbols that become definitions don't get the DEF_REGULAR |
3050 | flag set, so test it first, and don't bail out. */ | |
3051 | if (ELF_COMMON_DEF_P (h)) | |
3052 | /* Do nothing. */; | |
f6c52c13 | 3053 | /* If we don't have a definition in a regular file, then we can't |
49ff44d6 L |
3054 | resolve locally. The sym is either undefined or dynamic. */ |
3055 | else if (!h->def_regular) | |
f6c52c13 AM |
3056 | return FALSE; |
3057 | ||
3058 | /* Forced local symbols resolve locally. */ | |
f5385ebf | 3059 | if (h->forced_local) |
f6c52c13 AM |
3060 | return TRUE; |
3061 | ||
3062 | /* As do non-dynamic symbols. */ | |
3063 | if (h->dynindx == -1) | |
3064 | return TRUE; | |
3065 | ||
3066 | /* At this point, we know the symbol is defined and dynamic. In an | |
3067 | executable it must resolve locally, likewise when building symbolic | |
3068 | shared libraries. */ | |
0e1862bb | 3069 | if (bfd_link_executable (info) || SYMBOLIC_BIND (info, h)) |
f6c52c13 AM |
3070 | return TRUE; |
3071 | ||
3072 | /* Now deal with defined dynamic symbols in shared libraries. Ones | |
3073 | with default visibility might not resolve locally. */ | |
3074 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
3075 | return FALSE; | |
3076 | ||
fcb93ecf PB |
3077 | hash_table = elf_hash_table (info); |
3078 | if (!is_elf_hash_table (hash_table)) | |
3079 | return TRUE; | |
3080 | ||
3081 | bed = get_elf_backend_data (hash_table->dynobj); | |
3082 | ||
f7483970 L |
3083 | /* If extern_protected_data is false, STV_PROTECTED non-function |
3084 | symbols are local. */ | |
889c2a67 L |
3085 | if ((!info->extern_protected_data |
3086 | || (info->extern_protected_data < 0 | |
3087 | && !bed->extern_protected_data)) | |
3088 | && !bed->is_function_type (h->type)) | |
1c16dfa5 L |
3089 | return TRUE; |
3090 | ||
f6c52c13 | 3091 | /* Function pointer equality tests may require that STV_PROTECTED |
2676a7d9 AM |
3092 | symbols be treated as dynamic symbols. If the address of a |
3093 | function not defined in an executable is set to that function's | |
3094 | plt entry in the executable, then the address of the function in | |
3095 | a shared library must also be the plt entry in the executable. */ | |
f6c52c13 AM |
3096 | return local_protected; |
3097 | } | |
e1918d23 AM |
3098 | |
3099 | /* Caches some TLS segment info, and ensures that the TLS segment vma is | |
3100 | aligned. Returns the first TLS output section. */ | |
3101 | ||
3102 | struct bfd_section * | |
3103 | _bfd_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) | |
3104 | { | |
3105 | struct bfd_section *sec, *tls; | |
3106 | unsigned int align = 0; | |
3107 | ||
3108 | for (sec = obfd->sections; sec != NULL; sec = sec->next) | |
3109 | if ((sec->flags & SEC_THREAD_LOCAL) != 0) | |
3110 | break; | |
3111 | tls = sec; | |
3112 | ||
3113 | for (; sec != NULL && (sec->flags & SEC_THREAD_LOCAL) != 0; sec = sec->next) | |
3114 | if (sec->alignment_power > align) | |
3115 | align = sec->alignment_power; | |
3116 | ||
3117 | elf_hash_table (info)->tls_sec = tls; | |
3118 | ||
3119 | /* Ensure the alignment of the first section is the largest alignment, | |
3120 | so that the tls segment starts aligned. */ | |
3121 | if (tls != NULL) | |
3122 | tls->alignment_power = align; | |
3123 | ||
3124 | return tls; | |
3125 | } | |
0ad989f9 L |
3126 | |
3127 | /* Return TRUE iff this is a non-common, definition of a non-function symbol. */ | |
3128 | static bfd_boolean | |
3129 | is_global_data_symbol_definition (bfd *abfd ATTRIBUTE_UNUSED, | |
3130 | Elf_Internal_Sym *sym) | |
3131 | { | |
a4d8e49b L |
3132 | const struct elf_backend_data *bed; |
3133 | ||
0ad989f9 L |
3134 | /* Local symbols do not count, but target specific ones might. */ |
3135 | if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL | |
3136 | && ELF_ST_BIND (sym->st_info) < STB_LOOS) | |
3137 | return FALSE; | |
3138 | ||
fcb93ecf | 3139 | bed = get_elf_backend_data (abfd); |
0ad989f9 | 3140 | /* Function symbols do not count. */ |
fcb93ecf | 3141 | if (bed->is_function_type (ELF_ST_TYPE (sym->st_info))) |
0ad989f9 L |
3142 | return FALSE; |
3143 | ||
3144 | /* If the section is undefined, then so is the symbol. */ | |
3145 | if (sym->st_shndx == SHN_UNDEF) | |
3146 | return FALSE; | |
3147 | ||
3148 | /* If the symbol is defined in the common section, then | |
3149 | it is a common definition and so does not count. */ | |
a4d8e49b | 3150 | if (bed->common_definition (sym)) |
0ad989f9 L |
3151 | return FALSE; |
3152 | ||
3153 | /* If the symbol is in a target specific section then we | |
3154 | must rely upon the backend to tell us what it is. */ | |
3155 | if (sym->st_shndx >= SHN_LORESERVE && sym->st_shndx < SHN_ABS) | |
3156 | /* FIXME - this function is not coded yet: | |
3157 | ||
3158 | return _bfd_is_global_symbol_definition (abfd, sym); | |
3159 | ||
3160 | Instead for now assume that the definition is not global, | |
3161 | Even if this is wrong, at least the linker will behave | |
3162 | in the same way that it used to do. */ | |
3163 | return FALSE; | |
3164 | ||
3165 | return TRUE; | |
3166 | } | |
3167 | ||
3168 | /* Search the symbol table of the archive element of the archive ABFD | |
3169 | whose archive map contains a mention of SYMDEF, and determine if | |
3170 | the symbol is defined in this element. */ | |
3171 | static bfd_boolean | |
3172 | elf_link_is_defined_archive_symbol (bfd * abfd, carsym * symdef) | |
3173 | { | |
3174 | Elf_Internal_Shdr * hdr; | |
ef53be89 AM |
3175 | size_t symcount; |
3176 | size_t extsymcount; | |
3177 | size_t extsymoff; | |
0ad989f9 L |
3178 | Elf_Internal_Sym *isymbuf; |
3179 | Elf_Internal_Sym *isym; | |
3180 | Elf_Internal_Sym *isymend; | |
3181 | bfd_boolean result; | |
3182 | ||
3183 | abfd = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
3184 | if (abfd == NULL) | |
3185 | return FALSE; | |
3186 | ||
3187 | if (! bfd_check_format (abfd, bfd_object)) | |
3188 | return FALSE; | |
3189 | ||
7dc3990e L |
3190 | /* Select the appropriate symbol table. If we don't know if the |
3191 | object file is an IR object, give linker LTO plugin a chance to | |
3192 | get the correct symbol table. */ | |
3193 | if (abfd->plugin_format == bfd_plugin_yes | |
08ce1d72 | 3194 | #if BFD_SUPPORTS_PLUGINS |
7dc3990e L |
3195 | || (abfd->plugin_format == bfd_plugin_unknown |
3196 | && bfd_link_plugin_object_p (abfd)) | |
3197 | #endif | |
3198 | ) | |
3199 | { | |
3200 | /* Use the IR symbol table if the object has been claimed by | |
3201 | plugin. */ | |
3202 | abfd = abfd->plugin_dummy_bfd; | |
3203 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
3204 | } | |
3205 | else if ((abfd->flags & DYNAMIC) == 0 || elf_dynsymtab (abfd) == 0) | |
0ad989f9 L |
3206 | hdr = &elf_tdata (abfd)->symtab_hdr; |
3207 | else | |
3208 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
3209 | ||
3210 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
3211 | ||
3212 | /* The sh_info field of the symtab header tells us where the | |
3213 | external symbols start. We don't care about the local symbols. */ | |
3214 | if (elf_bad_symtab (abfd)) | |
3215 | { | |
3216 | extsymcount = symcount; | |
3217 | extsymoff = 0; | |
3218 | } | |
3219 | else | |
3220 | { | |
3221 | extsymcount = symcount - hdr->sh_info; | |
3222 | extsymoff = hdr->sh_info; | |
3223 | } | |
3224 | ||
3225 | if (extsymcount == 0) | |
3226 | return FALSE; | |
3227 | ||
3228 | /* Read in the symbol table. */ | |
3229 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
3230 | NULL, NULL, NULL); | |
3231 | if (isymbuf == NULL) | |
3232 | return FALSE; | |
3233 | ||
3234 | /* Scan the symbol table looking for SYMDEF. */ | |
3235 | result = FALSE; | |
3236 | for (isym = isymbuf, isymend = isymbuf + extsymcount; isym < isymend; isym++) | |
3237 | { | |
3238 | const char *name; | |
3239 | ||
3240 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
3241 | isym->st_name); | |
3242 | if (name == NULL) | |
3243 | break; | |
3244 | ||
3245 | if (strcmp (name, symdef->name) == 0) | |
3246 | { | |
3247 | result = is_global_data_symbol_definition (abfd, isym); | |
3248 | break; | |
3249 | } | |
3250 | } | |
3251 | ||
3252 | free (isymbuf); | |
3253 | ||
3254 | return result; | |
3255 | } | |
3256 | \f | |
5a580b3a AM |
3257 | /* Add an entry to the .dynamic table. */ |
3258 | ||
3259 | bfd_boolean | |
3260 | _bfd_elf_add_dynamic_entry (struct bfd_link_info *info, | |
3261 | bfd_vma tag, | |
3262 | bfd_vma val) | |
3263 | { | |
3264 | struct elf_link_hash_table *hash_table; | |
3265 | const struct elf_backend_data *bed; | |
3266 | asection *s; | |
3267 | bfd_size_type newsize; | |
3268 | bfd_byte *newcontents; | |
3269 | Elf_Internal_Dyn dyn; | |
3270 | ||
3271 | hash_table = elf_hash_table (info); | |
3272 | if (! is_elf_hash_table (hash_table)) | |
3273 | return FALSE; | |
3274 | ||
3275 | bed = get_elf_backend_data (hash_table->dynobj); | |
3d4d4302 | 3276 | s = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
5a580b3a AM |
3277 | BFD_ASSERT (s != NULL); |
3278 | ||
eea6121a | 3279 | newsize = s->size + bed->s->sizeof_dyn; |
a50b1753 | 3280 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); |
5a580b3a AM |
3281 | if (newcontents == NULL) |
3282 | return FALSE; | |
3283 | ||
3284 | dyn.d_tag = tag; | |
3285 | dyn.d_un.d_val = val; | |
eea6121a | 3286 | bed->s->swap_dyn_out (hash_table->dynobj, &dyn, newcontents + s->size); |
5a580b3a | 3287 | |
eea6121a | 3288 | s->size = newsize; |
5a580b3a AM |
3289 | s->contents = newcontents; |
3290 | ||
3291 | return TRUE; | |
3292 | } | |
3293 | ||
3294 | /* Add a DT_NEEDED entry for this dynamic object if DO_IT is true, | |
3295 | otherwise just check whether one already exists. Returns -1 on error, | |
3296 | 1 if a DT_NEEDED tag already exists, and 0 on success. */ | |
3297 | ||
4ad4eba5 | 3298 | static int |
7e9f0867 AM |
3299 | elf_add_dt_needed_tag (bfd *abfd, |
3300 | struct bfd_link_info *info, | |
4ad4eba5 AM |
3301 | const char *soname, |
3302 | bfd_boolean do_it) | |
5a580b3a AM |
3303 | { |
3304 | struct elf_link_hash_table *hash_table; | |
ef53be89 | 3305 | size_t strindex; |
5a580b3a | 3306 | |
7e9f0867 AM |
3307 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
3308 | return -1; | |
3309 | ||
5a580b3a | 3310 | hash_table = elf_hash_table (info); |
5a580b3a | 3311 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, soname, FALSE); |
ef53be89 | 3312 | if (strindex == (size_t) -1) |
5a580b3a AM |
3313 | return -1; |
3314 | ||
02be4619 | 3315 | if (_bfd_elf_strtab_refcount (hash_table->dynstr, strindex) != 1) |
5a580b3a AM |
3316 | { |
3317 | asection *sdyn; | |
3318 | const struct elf_backend_data *bed; | |
3319 | bfd_byte *extdyn; | |
3320 | ||
3321 | bed = get_elf_backend_data (hash_table->dynobj); | |
3d4d4302 | 3322 | sdyn = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
7e9f0867 AM |
3323 | if (sdyn != NULL) |
3324 | for (extdyn = sdyn->contents; | |
3325 | extdyn < sdyn->contents + sdyn->size; | |
3326 | extdyn += bed->s->sizeof_dyn) | |
3327 | { | |
3328 | Elf_Internal_Dyn dyn; | |
5a580b3a | 3329 | |
7e9f0867 AM |
3330 | bed->s->swap_dyn_in (hash_table->dynobj, extdyn, &dyn); |
3331 | if (dyn.d_tag == DT_NEEDED | |
3332 | && dyn.d_un.d_val == strindex) | |
3333 | { | |
3334 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3335 | return 1; | |
3336 | } | |
3337 | } | |
5a580b3a AM |
3338 | } |
3339 | ||
3340 | if (do_it) | |
3341 | { | |
7e9f0867 AM |
3342 | if (!_bfd_elf_link_create_dynamic_sections (hash_table->dynobj, info)) |
3343 | return -1; | |
3344 | ||
5a580b3a AM |
3345 | if (!_bfd_elf_add_dynamic_entry (info, DT_NEEDED, strindex)) |
3346 | return -1; | |
3347 | } | |
3348 | else | |
3349 | /* We were just checking for existence of the tag. */ | |
3350 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3351 | ||
3352 | return 0; | |
3353 | } | |
3354 | ||
7b15fa7a AM |
3355 | /* Return true if SONAME is on the needed list between NEEDED and STOP |
3356 | (or the end of list if STOP is NULL), and needed by a library that | |
3357 | will be loaded. */ | |
3358 | ||
010e5ae2 | 3359 | static bfd_boolean |
7b15fa7a AM |
3360 | on_needed_list (const char *soname, |
3361 | struct bfd_link_needed_list *needed, | |
3362 | struct bfd_link_needed_list *stop) | |
010e5ae2 | 3363 | { |
7b15fa7a AM |
3364 | struct bfd_link_needed_list *look; |
3365 | for (look = needed; look != stop; look = look->next) | |
3366 | if (strcmp (soname, look->name) == 0 | |
3367 | && ((elf_dyn_lib_class (look->by) & DYN_AS_NEEDED) == 0 | |
3368 | /* If needed by a library that itself is not directly | |
3369 | needed, recursively check whether that library is | |
3370 | indirectly needed. Since we add DT_NEEDED entries to | |
3371 | the end of the list, library dependencies appear after | |
3372 | the library. Therefore search prior to the current | |
3373 | LOOK, preventing possible infinite recursion. */ | |
3374 | || on_needed_list (elf_dt_name (look->by), needed, look))) | |
010e5ae2 AM |
3375 | return TRUE; |
3376 | ||
3377 | return FALSE; | |
3378 | } | |
3379 | ||
14160578 | 3380 | /* Sort symbol by value, section, and size. */ |
4ad4eba5 AM |
3381 | static int |
3382 | elf_sort_symbol (const void *arg1, const void *arg2) | |
5a580b3a AM |
3383 | { |
3384 | const struct elf_link_hash_entry *h1; | |
3385 | const struct elf_link_hash_entry *h2; | |
10b7e05b | 3386 | bfd_signed_vma vdiff; |
5a580b3a AM |
3387 | |
3388 | h1 = *(const struct elf_link_hash_entry **) arg1; | |
3389 | h2 = *(const struct elf_link_hash_entry **) arg2; | |
10b7e05b NC |
3390 | vdiff = h1->root.u.def.value - h2->root.u.def.value; |
3391 | if (vdiff != 0) | |
3392 | return vdiff > 0 ? 1 : -1; | |
3393 | else | |
3394 | { | |
d3435ae8 | 3395 | int sdiff = h1->root.u.def.section->id - h2->root.u.def.section->id; |
10b7e05b NC |
3396 | if (sdiff != 0) |
3397 | return sdiff > 0 ? 1 : -1; | |
3398 | } | |
14160578 AM |
3399 | vdiff = h1->size - h2->size; |
3400 | return vdiff == 0 ? 0 : vdiff > 0 ? 1 : -1; | |
5a580b3a | 3401 | } |
4ad4eba5 | 3402 | |
5a580b3a AM |
3403 | /* This function is used to adjust offsets into .dynstr for |
3404 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
3405 | ||
3406 | static bfd_boolean | |
3407 | elf_adjust_dynstr_offsets (struct elf_link_hash_entry *h, void *data) | |
3408 | { | |
a50b1753 | 3409 | struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data; |
5a580b3a | 3410 | |
5a580b3a AM |
3411 | if (h->dynindx != -1) |
3412 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
3413 | return TRUE; | |
3414 | } | |
3415 | ||
3416 | /* Assign string offsets in .dynstr, update all structures referencing | |
3417 | them. */ | |
3418 | ||
4ad4eba5 AM |
3419 | static bfd_boolean |
3420 | elf_finalize_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
5a580b3a AM |
3421 | { |
3422 | struct elf_link_hash_table *hash_table = elf_hash_table (info); | |
3423 | struct elf_link_local_dynamic_entry *entry; | |
3424 | struct elf_strtab_hash *dynstr = hash_table->dynstr; | |
3425 | bfd *dynobj = hash_table->dynobj; | |
3426 | asection *sdyn; | |
3427 | bfd_size_type size; | |
3428 | const struct elf_backend_data *bed; | |
3429 | bfd_byte *extdyn; | |
3430 | ||
3431 | _bfd_elf_strtab_finalize (dynstr); | |
3432 | size = _bfd_elf_strtab_size (dynstr); | |
3433 | ||
3434 | bed = get_elf_backend_data (dynobj); | |
3d4d4302 | 3435 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
5a580b3a AM |
3436 | BFD_ASSERT (sdyn != NULL); |
3437 | ||
3438 | /* Update all .dynamic entries referencing .dynstr strings. */ | |
3439 | for (extdyn = sdyn->contents; | |
eea6121a | 3440 | extdyn < sdyn->contents + sdyn->size; |
5a580b3a AM |
3441 | extdyn += bed->s->sizeof_dyn) |
3442 | { | |
3443 | Elf_Internal_Dyn dyn; | |
3444 | ||
3445 | bed->s->swap_dyn_in (dynobj, extdyn, &dyn); | |
3446 | switch (dyn.d_tag) | |
3447 | { | |
3448 | case DT_STRSZ: | |
3449 | dyn.d_un.d_val = size; | |
3450 | break; | |
3451 | case DT_NEEDED: | |
3452 | case DT_SONAME: | |
3453 | case DT_RPATH: | |
3454 | case DT_RUNPATH: | |
3455 | case DT_FILTER: | |
3456 | case DT_AUXILIARY: | |
7ee314fa AM |
3457 | case DT_AUDIT: |
3458 | case DT_DEPAUDIT: | |
5a580b3a AM |
3459 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); |
3460 | break; | |
3461 | default: | |
3462 | continue; | |
3463 | } | |
3464 | bed->s->swap_dyn_out (dynobj, &dyn, extdyn); | |
3465 | } | |
3466 | ||
3467 | /* Now update local dynamic symbols. */ | |
3468 | for (entry = hash_table->dynlocal; entry ; entry = entry->next) | |
3469 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
3470 | entry->isym.st_name); | |
3471 | ||
3472 | /* And the rest of dynamic symbols. */ | |
3473 | elf_link_hash_traverse (hash_table, elf_adjust_dynstr_offsets, dynstr); | |
3474 | ||
3475 | /* Adjust version definitions. */ | |
3476 | if (elf_tdata (output_bfd)->cverdefs) | |
3477 | { | |
3478 | asection *s; | |
3479 | bfd_byte *p; | |
ef53be89 | 3480 | size_t i; |
5a580b3a AM |
3481 | Elf_Internal_Verdef def; |
3482 | Elf_Internal_Verdaux defaux; | |
3483 | ||
3d4d4302 | 3484 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); |
5a580b3a AM |
3485 | p = s->contents; |
3486 | do | |
3487 | { | |
3488 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, | |
3489 | &def); | |
3490 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
3491 | if (def.vd_aux != sizeof (Elf_External_Verdef)) |
3492 | continue; | |
5a580b3a AM |
3493 | for (i = 0; i < def.vd_cnt; ++i) |
3494 | { | |
3495 | _bfd_elf_swap_verdaux_in (output_bfd, | |
3496 | (Elf_External_Verdaux *) p, &defaux); | |
3497 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
3498 | defaux.vda_name); | |
3499 | _bfd_elf_swap_verdaux_out (output_bfd, | |
3500 | &defaux, (Elf_External_Verdaux *) p); | |
3501 | p += sizeof (Elf_External_Verdaux); | |
3502 | } | |
3503 | } | |
3504 | while (def.vd_next); | |
3505 | } | |
3506 | ||
3507 | /* Adjust version references. */ | |
3508 | if (elf_tdata (output_bfd)->verref) | |
3509 | { | |
3510 | asection *s; | |
3511 | bfd_byte *p; | |
ef53be89 | 3512 | size_t i; |
5a580b3a AM |
3513 | Elf_Internal_Verneed need; |
3514 | Elf_Internal_Vernaux needaux; | |
3515 | ||
3d4d4302 | 3516 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); |
5a580b3a AM |
3517 | p = s->contents; |
3518 | do | |
3519 | { | |
3520 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, | |
3521 | &need); | |
3522 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
3523 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
3524 | (Elf_External_Verneed *) p); | |
3525 | p += sizeof (Elf_External_Verneed); | |
3526 | for (i = 0; i < need.vn_cnt; ++i) | |
3527 | { | |
3528 | _bfd_elf_swap_vernaux_in (output_bfd, | |
3529 | (Elf_External_Vernaux *) p, &needaux); | |
3530 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
3531 | needaux.vna_name); | |
3532 | _bfd_elf_swap_vernaux_out (output_bfd, | |
3533 | &needaux, | |
3534 | (Elf_External_Vernaux *) p); | |
3535 | p += sizeof (Elf_External_Vernaux); | |
3536 | } | |
3537 | } | |
3538 | while (need.vn_next); | |
3539 | } | |
3540 | ||
3541 | return TRUE; | |
3542 | } | |
3543 | \f | |
13285a1b AM |
3544 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. |
3545 | The default is to only match when the INPUT and OUTPUT are exactly | |
3546 | the same target. */ | |
3547 | ||
3548 | bfd_boolean | |
3549 | _bfd_elf_default_relocs_compatible (const bfd_target *input, | |
3550 | const bfd_target *output) | |
3551 | { | |
3552 | return input == output; | |
3553 | } | |
3554 | ||
3555 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. | |
3556 | This version is used when different targets for the same architecture | |
3557 | are virtually identical. */ | |
3558 | ||
3559 | bfd_boolean | |
3560 | _bfd_elf_relocs_compatible (const bfd_target *input, | |
3561 | const bfd_target *output) | |
3562 | { | |
3563 | const struct elf_backend_data *obed, *ibed; | |
3564 | ||
3565 | if (input == output) | |
3566 | return TRUE; | |
3567 | ||
3568 | ibed = xvec_get_elf_backend_data (input); | |
3569 | obed = xvec_get_elf_backend_data (output); | |
3570 | ||
3571 | if (ibed->arch != obed->arch) | |
3572 | return FALSE; | |
3573 | ||
3574 | /* If both backends are using this function, deem them compatible. */ | |
3575 | return ibed->relocs_compatible == obed->relocs_compatible; | |
3576 | } | |
3577 | ||
e5034e59 AM |
3578 | /* Make a special call to the linker "notice" function to tell it that |
3579 | we are about to handle an as-needed lib, or have finished | |
1b786873 | 3580 | processing the lib. */ |
e5034e59 AM |
3581 | |
3582 | bfd_boolean | |
3583 | _bfd_elf_notice_as_needed (bfd *ibfd, | |
3584 | struct bfd_link_info *info, | |
3585 | enum notice_asneeded_action act) | |
3586 | { | |
46135103 | 3587 | return (*info->callbacks->notice) (info, NULL, NULL, ibfd, NULL, act, 0); |
e5034e59 AM |
3588 | } |
3589 | ||
d9689752 L |
3590 | /* Check relocations an ELF object file. */ |
3591 | ||
3592 | bfd_boolean | |
3593 | _bfd_elf_link_check_relocs (bfd *abfd, struct bfd_link_info *info) | |
3594 | { | |
3595 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3596 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
3597 | ||
3598 | /* If this object is the same format as the output object, and it is | |
3599 | not a shared library, then let the backend look through the | |
3600 | relocs. | |
3601 | ||
3602 | This is required to build global offset table entries and to | |
3603 | arrange for dynamic relocs. It is not required for the | |
3604 | particular common case of linking non PIC code, even when linking | |
3605 | against shared libraries, but unfortunately there is no way of | |
3606 | knowing whether an object file has been compiled PIC or not. | |
3607 | Looking through the relocs is not particularly time consuming. | |
3608 | The problem is that we must either (1) keep the relocs in memory, | |
3609 | which causes the linker to require additional runtime memory or | |
3610 | (2) read the relocs twice from the input file, which wastes time. | |
3611 | This would be a good case for using mmap. | |
3612 | ||
3613 | I have no idea how to handle linking PIC code into a file of a | |
3614 | different format. It probably can't be done. */ | |
3615 | if ((abfd->flags & DYNAMIC) == 0 | |
3616 | && is_elf_hash_table (htab) | |
3617 | && bed->check_relocs != NULL | |
3618 | && elf_object_id (abfd) == elf_hash_table_id (htab) | |
3619 | && (*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) | |
3620 | { | |
3621 | asection *o; | |
3622 | ||
3623 | for (o = abfd->sections; o != NULL; o = o->next) | |
3624 | { | |
3625 | Elf_Internal_Rela *internal_relocs; | |
3626 | bfd_boolean ok; | |
3627 | ||
5ce03cea | 3628 | /* Don't check relocations in excluded sections. */ |
d9689752 | 3629 | if ((o->flags & SEC_RELOC) == 0 |
5ce03cea | 3630 | || (o->flags & SEC_EXCLUDE) != 0 |
d9689752 L |
3631 | || o->reloc_count == 0 |
3632 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
3633 | && (o->flags & SEC_DEBUGGING) != 0) | |
3634 | || bfd_is_abs_section (o->output_section)) | |
3635 | continue; | |
3636 | ||
3637 | internal_relocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, | |
3638 | info->keep_memory); | |
3639 | if (internal_relocs == NULL) | |
3640 | return FALSE; | |
3641 | ||
3642 | ok = (*bed->check_relocs) (abfd, info, o, internal_relocs); | |
3643 | ||
3644 | if (elf_section_data (o)->relocs != internal_relocs) | |
3645 | free (internal_relocs); | |
3646 | ||
3647 | if (! ok) | |
3648 | return FALSE; | |
3649 | } | |
3650 | } | |
3651 | ||
3652 | return TRUE; | |
3653 | } | |
3654 | ||
4ad4eba5 AM |
3655 | /* Add symbols from an ELF object file to the linker hash table. */ |
3656 | ||
3657 | static bfd_boolean | |
3658 | elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) | |
3659 | { | |
a0c402a5 | 3660 | Elf_Internal_Ehdr *ehdr; |
4ad4eba5 | 3661 | Elf_Internal_Shdr *hdr; |
ef53be89 AM |
3662 | size_t symcount; |
3663 | size_t extsymcount; | |
3664 | size_t extsymoff; | |
4ad4eba5 AM |
3665 | struct elf_link_hash_entry **sym_hash; |
3666 | bfd_boolean dynamic; | |
3667 | Elf_External_Versym *extversym = NULL; | |
3668 | Elf_External_Versym *ever; | |
3669 | struct elf_link_hash_entry *weaks; | |
3670 | struct elf_link_hash_entry **nondeflt_vers = NULL; | |
ef53be89 | 3671 | size_t nondeflt_vers_cnt = 0; |
4ad4eba5 AM |
3672 | Elf_Internal_Sym *isymbuf = NULL; |
3673 | Elf_Internal_Sym *isym; | |
3674 | Elf_Internal_Sym *isymend; | |
3675 | const struct elf_backend_data *bed; | |
3676 | bfd_boolean add_needed; | |
66eb6687 | 3677 | struct elf_link_hash_table *htab; |
4ad4eba5 | 3678 | bfd_size_type amt; |
66eb6687 | 3679 | void *alloc_mark = NULL; |
4f87808c AM |
3680 | struct bfd_hash_entry **old_table = NULL; |
3681 | unsigned int old_size = 0; | |
3682 | unsigned int old_count = 0; | |
66eb6687 | 3683 | void *old_tab = NULL; |
66eb6687 AM |
3684 | void *old_ent; |
3685 | struct bfd_link_hash_entry *old_undefs = NULL; | |
3686 | struct bfd_link_hash_entry *old_undefs_tail = NULL; | |
5b677558 | 3687 | void *old_strtab = NULL; |
66eb6687 | 3688 | size_t tabsize = 0; |
db6a5d5f | 3689 | asection *s; |
29a9f53e | 3690 | bfd_boolean just_syms; |
4ad4eba5 | 3691 | |
66eb6687 | 3692 | htab = elf_hash_table (info); |
4ad4eba5 | 3693 | bed = get_elf_backend_data (abfd); |
4ad4eba5 AM |
3694 | |
3695 | if ((abfd->flags & DYNAMIC) == 0) | |
3696 | dynamic = FALSE; | |
3697 | else | |
3698 | { | |
3699 | dynamic = TRUE; | |
3700 | ||
3701 | /* You can't use -r against a dynamic object. Also, there's no | |
3702 | hope of using a dynamic object which does not exactly match | |
3703 | the format of the output file. */ | |
0e1862bb | 3704 | if (bfd_link_relocatable (info) |
66eb6687 | 3705 | || !is_elf_hash_table (htab) |
f13a99db | 3706 | || info->output_bfd->xvec != abfd->xvec) |
4ad4eba5 | 3707 | { |
0e1862bb | 3708 | if (bfd_link_relocatable (info)) |
9a0789ec NC |
3709 | bfd_set_error (bfd_error_invalid_operation); |
3710 | else | |
3711 | bfd_set_error (bfd_error_wrong_format); | |
4ad4eba5 AM |
3712 | goto error_return; |
3713 | } | |
3714 | } | |
3715 | ||
a0c402a5 L |
3716 | ehdr = elf_elfheader (abfd); |
3717 | if (info->warn_alternate_em | |
3718 | && bed->elf_machine_code != ehdr->e_machine | |
3719 | && ((bed->elf_machine_alt1 != 0 | |
3720 | && ehdr->e_machine == bed->elf_machine_alt1) | |
3721 | || (bed->elf_machine_alt2 != 0 | |
3722 | && ehdr->e_machine == bed->elf_machine_alt2))) | |
3723 | info->callbacks->einfo | |
695344c0 | 3724 | /* xgettext:c-format */ |
a0c402a5 L |
3725 | (_("%P: alternate ELF machine code found (%d) in %B, expecting %d\n"), |
3726 | ehdr->e_machine, abfd, bed->elf_machine_code); | |
3727 | ||
4ad4eba5 AM |
3728 | /* As a GNU extension, any input sections which are named |
3729 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
3730 | symbol. This differs from .gnu.warning sections, which generate | |
3731 | warnings when they are included in an output file. */ | |
dd98f8d2 | 3732 | /* PR 12761: Also generate this warning when building shared libraries. */ |
db6a5d5f | 3733 | for (s = abfd->sections; s != NULL; s = s->next) |
4ad4eba5 | 3734 | { |
db6a5d5f | 3735 | const char *name; |
4ad4eba5 | 3736 | |
db6a5d5f AM |
3737 | name = bfd_get_section_name (abfd, s); |
3738 | if (CONST_STRNEQ (name, ".gnu.warning.")) | |
4ad4eba5 | 3739 | { |
db6a5d5f AM |
3740 | char *msg; |
3741 | bfd_size_type sz; | |
3742 | ||
3743 | name += sizeof ".gnu.warning." - 1; | |
3744 | ||
3745 | /* If this is a shared object, then look up the symbol | |
3746 | in the hash table. If it is there, and it is already | |
3747 | been defined, then we will not be using the entry | |
3748 | from this shared object, so we don't need to warn. | |
3749 | FIXME: If we see the definition in a regular object | |
3750 | later on, we will warn, but we shouldn't. The only | |
3751 | fix is to keep track of what warnings we are supposed | |
3752 | to emit, and then handle them all at the end of the | |
3753 | link. */ | |
3754 | if (dynamic) | |
4ad4eba5 | 3755 | { |
db6a5d5f AM |
3756 | struct elf_link_hash_entry *h; |
3757 | ||
3758 | h = elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE); | |
3759 | ||
3760 | /* FIXME: What about bfd_link_hash_common? */ | |
3761 | if (h != NULL | |
3762 | && (h->root.type == bfd_link_hash_defined | |
3763 | || h->root.type == bfd_link_hash_defweak)) | |
3764 | continue; | |
3765 | } | |
4ad4eba5 | 3766 | |
db6a5d5f AM |
3767 | sz = s->size; |
3768 | msg = (char *) bfd_alloc (abfd, sz + 1); | |
3769 | if (msg == NULL) | |
3770 | goto error_return; | |
4ad4eba5 | 3771 | |
db6a5d5f AM |
3772 | if (! bfd_get_section_contents (abfd, s, msg, 0, sz)) |
3773 | goto error_return; | |
4ad4eba5 | 3774 | |
db6a5d5f | 3775 | msg[sz] = '\0'; |
4ad4eba5 | 3776 | |
db6a5d5f AM |
3777 | if (! (_bfd_generic_link_add_one_symbol |
3778 | (info, abfd, name, BSF_WARNING, s, 0, msg, | |
3779 | FALSE, bed->collect, NULL))) | |
3780 | goto error_return; | |
4ad4eba5 | 3781 | |
0e1862bb | 3782 | if (bfd_link_executable (info)) |
db6a5d5f AM |
3783 | { |
3784 | /* Clobber the section size so that the warning does | |
3785 | not get copied into the output file. */ | |
3786 | s->size = 0; | |
11d2f718 | 3787 | |
db6a5d5f AM |
3788 | /* Also set SEC_EXCLUDE, so that symbols defined in |
3789 | the warning section don't get copied to the output. */ | |
3790 | s->flags |= SEC_EXCLUDE; | |
4ad4eba5 AM |
3791 | } |
3792 | } | |
3793 | } | |
3794 | ||
29a9f53e L |
3795 | just_syms = ((s = abfd->sections) != NULL |
3796 | && s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS); | |
3797 | ||
4ad4eba5 AM |
3798 | add_needed = TRUE; |
3799 | if (! dynamic) | |
3800 | { | |
3801 | /* If we are creating a shared library, create all the dynamic | |
3802 | sections immediately. We need to attach them to something, | |
3803 | so we attach them to this BFD, provided it is the right | |
bf89386a L |
3804 | format and is not from ld --just-symbols. Always create the |
3805 | dynamic sections for -E/--dynamic-list. FIXME: If there | |
29a9f53e L |
3806 | are no input BFD's of the same format as the output, we can't |
3807 | make a shared library. */ | |
3808 | if (!just_syms | |
bf89386a | 3809 | && (bfd_link_pic (info) |
9c1d7a08 L |
3810 | || (!bfd_link_relocatable (info) |
3811 | && (info->export_dynamic || info->dynamic))) | |
66eb6687 | 3812 | && is_elf_hash_table (htab) |
f13a99db | 3813 | && info->output_bfd->xvec == abfd->xvec |
66eb6687 | 3814 | && !htab->dynamic_sections_created) |
4ad4eba5 AM |
3815 | { |
3816 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
3817 | goto error_return; | |
3818 | } | |
3819 | } | |
66eb6687 | 3820 | else if (!is_elf_hash_table (htab)) |
4ad4eba5 AM |
3821 | goto error_return; |
3822 | else | |
3823 | { | |
4ad4eba5 | 3824 | const char *soname = NULL; |
7ee314fa | 3825 | char *audit = NULL; |
4ad4eba5 | 3826 | struct bfd_link_needed_list *rpath = NULL, *runpath = NULL; |
9acc85a6 | 3827 | const Elf_Internal_Phdr *phdr; |
4ad4eba5 AM |
3828 | int ret; |
3829 | ||
3830 | /* ld --just-symbols and dynamic objects don't mix very well. | |
92fd189d | 3831 | ld shouldn't allow it. */ |
29a9f53e | 3832 | if (just_syms) |
92fd189d | 3833 | abort (); |
4ad4eba5 AM |
3834 | |
3835 | /* If this dynamic lib was specified on the command line with | |
3836 | --as-needed in effect, then we don't want to add a DT_NEEDED | |
3837 | tag unless the lib is actually used. Similary for libs brought | |
e56f61be L |
3838 | in by another lib's DT_NEEDED. When --no-add-needed is used |
3839 | on a dynamic lib, we don't want to add a DT_NEEDED entry for | |
3840 | any dynamic library in DT_NEEDED tags in the dynamic lib at | |
3841 | all. */ | |
3842 | add_needed = (elf_dyn_lib_class (abfd) | |
3843 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | |
3844 | | DYN_NO_NEEDED)) == 0; | |
4ad4eba5 AM |
3845 | |
3846 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
3847 | if (s != NULL) | |
3848 | { | |
3849 | bfd_byte *dynbuf; | |
3850 | bfd_byte *extdyn; | |
cb33740c | 3851 | unsigned int elfsec; |
4ad4eba5 AM |
3852 | unsigned long shlink; |
3853 | ||
eea6121a | 3854 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) |
f8703194 L |
3855 | { |
3856 | error_free_dyn: | |
3857 | free (dynbuf); | |
3858 | goto error_return; | |
3859 | } | |
4ad4eba5 AM |
3860 | |
3861 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 3862 | if (elfsec == SHN_BAD) |
4ad4eba5 AM |
3863 | goto error_free_dyn; |
3864 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
3865 | ||
3866 | for (extdyn = dynbuf; | |
eea6121a | 3867 | extdyn < dynbuf + s->size; |
4ad4eba5 AM |
3868 | extdyn += bed->s->sizeof_dyn) |
3869 | { | |
3870 | Elf_Internal_Dyn dyn; | |
3871 | ||
3872 | bed->s->swap_dyn_in (abfd, extdyn, &dyn); | |
3873 | if (dyn.d_tag == DT_SONAME) | |
3874 | { | |
3875 | unsigned int tagv = dyn.d_un.d_val; | |
3876 | soname = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
3877 | if (soname == NULL) | |
3878 | goto error_free_dyn; | |
3879 | } | |
3880 | if (dyn.d_tag == DT_NEEDED) | |
3881 | { | |
3882 | struct bfd_link_needed_list *n, **pn; | |
3883 | char *fnm, *anm; | |
3884 | unsigned int tagv = dyn.d_un.d_val; | |
3885 | ||
3886 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3887 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3888 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3889 | if (n == NULL || fnm == NULL) | |
3890 | goto error_free_dyn; | |
3891 | amt = strlen (fnm) + 1; | |
a50b1753 | 3892 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3893 | if (anm == NULL) |
3894 | goto error_free_dyn; | |
3895 | memcpy (anm, fnm, amt); | |
3896 | n->name = anm; | |
3897 | n->by = abfd; | |
3898 | n->next = NULL; | |
66eb6687 | 3899 | for (pn = &htab->needed; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
3900 | ; |
3901 | *pn = n; | |
3902 | } | |
3903 | if (dyn.d_tag == DT_RUNPATH) | |
3904 | { | |
3905 | struct bfd_link_needed_list *n, **pn; | |
3906 | char *fnm, *anm; | |
3907 | unsigned int tagv = dyn.d_un.d_val; | |
3908 | ||
3909 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3910 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3911 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3912 | if (n == NULL || fnm == NULL) | |
3913 | goto error_free_dyn; | |
3914 | amt = strlen (fnm) + 1; | |
a50b1753 | 3915 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3916 | if (anm == NULL) |
3917 | goto error_free_dyn; | |
3918 | memcpy (anm, fnm, amt); | |
3919 | n->name = anm; | |
3920 | n->by = abfd; | |
3921 | n->next = NULL; | |
3922 | for (pn = & runpath; | |
3923 | *pn != NULL; | |
3924 | pn = &(*pn)->next) | |
3925 | ; | |
3926 | *pn = n; | |
3927 | } | |
3928 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ | |
3929 | if (!runpath && dyn.d_tag == DT_RPATH) | |
3930 | { | |
3931 | struct bfd_link_needed_list *n, **pn; | |
3932 | char *fnm, *anm; | |
3933 | unsigned int tagv = dyn.d_un.d_val; | |
3934 | ||
3935 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3936 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3937 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3938 | if (n == NULL || fnm == NULL) | |
3939 | goto error_free_dyn; | |
3940 | amt = strlen (fnm) + 1; | |
a50b1753 | 3941 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 | 3942 | if (anm == NULL) |
f8703194 | 3943 | goto error_free_dyn; |
4ad4eba5 AM |
3944 | memcpy (anm, fnm, amt); |
3945 | n->name = anm; | |
3946 | n->by = abfd; | |
3947 | n->next = NULL; | |
3948 | for (pn = & rpath; | |
3949 | *pn != NULL; | |
3950 | pn = &(*pn)->next) | |
3951 | ; | |
3952 | *pn = n; | |
3953 | } | |
7ee314fa AM |
3954 | if (dyn.d_tag == DT_AUDIT) |
3955 | { | |
3956 | unsigned int tagv = dyn.d_un.d_val; | |
3957 | audit = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
3958 | } | |
4ad4eba5 AM |
3959 | } |
3960 | ||
3961 | free (dynbuf); | |
3962 | } | |
3963 | ||
3964 | /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that | |
3965 | frees all more recently bfd_alloc'd blocks as well. */ | |
3966 | if (runpath) | |
3967 | rpath = runpath; | |
3968 | ||
3969 | if (rpath) | |
3970 | { | |
3971 | struct bfd_link_needed_list **pn; | |
66eb6687 | 3972 | for (pn = &htab->runpath; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
3973 | ; |
3974 | *pn = rpath; | |
3975 | } | |
3976 | ||
9acc85a6 AM |
3977 | /* If we have a PT_GNU_RELRO program header, mark as read-only |
3978 | all sections contained fully therein. This makes relro | |
3979 | shared library sections appear as they will at run-time. */ | |
3980 | phdr = elf_tdata (abfd)->phdr + elf_elfheader (abfd)->e_phnum; | |
3981 | while (--phdr >= elf_tdata (abfd)->phdr) | |
3982 | if (phdr->p_type == PT_GNU_RELRO) | |
3983 | { | |
3984 | for (s = abfd->sections; s != NULL; s = s->next) | |
3985 | if ((s->flags & SEC_ALLOC) != 0 | |
3986 | && s->vma >= phdr->p_vaddr | |
3987 | && s->vma + s->size <= phdr->p_vaddr + phdr->p_memsz) | |
3988 | s->flags |= SEC_READONLY; | |
3989 | break; | |
3990 | } | |
3991 | ||
4ad4eba5 AM |
3992 | /* We do not want to include any of the sections in a dynamic |
3993 | object in the output file. We hack by simply clobbering the | |
3994 | list of sections in the BFD. This could be handled more | |
3995 | cleanly by, say, a new section flag; the existing | |
3996 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
3997 | still implies that the section takes up space in the output | |
3998 | file. */ | |
3999 | bfd_section_list_clear (abfd); | |
4000 | ||
4ad4eba5 AM |
4001 | /* Find the name to use in a DT_NEEDED entry that refers to this |
4002 | object. If the object has a DT_SONAME entry, we use it. | |
4003 | Otherwise, if the generic linker stuck something in | |
4004 | elf_dt_name, we use that. Otherwise, we just use the file | |
4005 | name. */ | |
4006 | if (soname == NULL || *soname == '\0') | |
4007 | { | |
4008 | soname = elf_dt_name (abfd); | |
4009 | if (soname == NULL || *soname == '\0') | |
4010 | soname = bfd_get_filename (abfd); | |
4011 | } | |
4012 | ||
4013 | /* Save the SONAME because sometimes the linker emulation code | |
4014 | will need to know it. */ | |
4015 | elf_dt_name (abfd) = soname; | |
4016 | ||
7e9f0867 | 4017 | ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed); |
4ad4eba5 AM |
4018 | if (ret < 0) |
4019 | goto error_return; | |
4020 | ||
4021 | /* If we have already included this dynamic object in the | |
4022 | link, just ignore it. There is no reason to include a | |
4023 | particular dynamic object more than once. */ | |
4024 | if (ret > 0) | |
4025 | return TRUE; | |
7ee314fa AM |
4026 | |
4027 | /* Save the DT_AUDIT entry for the linker emulation code. */ | |
68ffbac6 | 4028 | elf_dt_audit (abfd) = audit; |
4ad4eba5 AM |
4029 | } |
4030 | ||
4031 | /* If this is a dynamic object, we always link against the .dynsym | |
4032 | symbol table, not the .symtab symbol table. The dynamic linker | |
4033 | will only see the .dynsym symbol table, so there is no reason to | |
4034 | look at .symtab for a dynamic object. */ | |
4035 | ||
4036 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
4037 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
4038 | else | |
4039 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
4040 | ||
4041 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
4042 | ||
4043 | /* The sh_info field of the symtab header tells us where the | |
4044 | external symbols start. We don't care about the local symbols at | |
4045 | this point. */ | |
4046 | if (elf_bad_symtab (abfd)) | |
4047 | { | |
4048 | extsymcount = symcount; | |
4049 | extsymoff = 0; | |
4050 | } | |
4051 | else | |
4052 | { | |
4053 | extsymcount = symcount - hdr->sh_info; | |
4054 | extsymoff = hdr->sh_info; | |
4055 | } | |
4056 | ||
f45794cb | 4057 | sym_hash = elf_sym_hashes (abfd); |
012b2306 | 4058 | if (extsymcount != 0) |
4ad4eba5 AM |
4059 | { |
4060 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
4061 | NULL, NULL, NULL); | |
4062 | if (isymbuf == NULL) | |
4063 | goto error_return; | |
4064 | ||
4ad4eba5 | 4065 | if (sym_hash == NULL) |
012b2306 AM |
4066 | { |
4067 | /* We store a pointer to the hash table entry for each | |
4068 | external symbol. */ | |
ef53be89 AM |
4069 | amt = extsymcount; |
4070 | amt *= sizeof (struct elf_link_hash_entry *); | |
012b2306 AM |
4071 | sym_hash = (struct elf_link_hash_entry **) bfd_zalloc (abfd, amt); |
4072 | if (sym_hash == NULL) | |
4073 | goto error_free_sym; | |
4074 | elf_sym_hashes (abfd) = sym_hash; | |
4075 | } | |
4ad4eba5 AM |
4076 | } |
4077 | ||
4078 | if (dynamic) | |
4079 | { | |
4080 | /* Read in any version definitions. */ | |
fc0e6df6 PB |
4081 | if (!_bfd_elf_slurp_version_tables (abfd, |
4082 | info->default_imported_symver)) | |
4ad4eba5 AM |
4083 | goto error_free_sym; |
4084 | ||
4085 | /* Read in the symbol versions, but don't bother to convert them | |
4086 | to internal format. */ | |
4087 | if (elf_dynversym (abfd) != 0) | |
4088 | { | |
4089 | Elf_Internal_Shdr *versymhdr; | |
4090 | ||
4091 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
a50b1753 | 4092 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); |
4ad4eba5 AM |
4093 | if (extversym == NULL) |
4094 | goto error_free_sym; | |
4095 | amt = versymhdr->sh_size; | |
4096 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
4097 | || bfd_bread (extversym, amt, abfd) != amt) | |
4098 | goto error_free_vers; | |
4099 | } | |
4100 | } | |
4101 | ||
66eb6687 AM |
4102 | /* If we are loading an as-needed shared lib, save the symbol table |
4103 | state before we start adding symbols. If the lib turns out | |
4104 | to be unneeded, restore the state. */ | |
4105 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
4106 | { | |
4107 | unsigned int i; | |
4108 | size_t entsize; | |
4109 | ||
4110 | for (entsize = 0, i = 0; i < htab->root.table.size; i++) | |
4111 | { | |
4112 | struct bfd_hash_entry *p; | |
2de92251 | 4113 | struct elf_link_hash_entry *h; |
66eb6687 AM |
4114 | |
4115 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
2de92251 AM |
4116 | { |
4117 | h = (struct elf_link_hash_entry *) p; | |
4118 | entsize += htab->root.table.entsize; | |
4119 | if (h->root.type == bfd_link_hash_warning) | |
4120 | entsize += htab->root.table.entsize; | |
4121 | } | |
66eb6687 AM |
4122 | } |
4123 | ||
4124 | tabsize = htab->root.table.size * sizeof (struct bfd_hash_entry *); | |
f45794cb | 4125 | old_tab = bfd_malloc (tabsize + entsize); |
66eb6687 AM |
4126 | if (old_tab == NULL) |
4127 | goto error_free_vers; | |
4128 | ||
4129 | /* Remember the current objalloc pointer, so that all mem for | |
4130 | symbols added can later be reclaimed. */ | |
4131 | alloc_mark = bfd_hash_allocate (&htab->root.table, 1); | |
4132 | if (alloc_mark == NULL) | |
4133 | goto error_free_vers; | |
4134 | ||
5061a885 AM |
4135 | /* Make a special call to the linker "notice" function to |
4136 | tell it that we are about to handle an as-needed lib. */ | |
e5034e59 | 4137 | if (!(*bed->notice_as_needed) (abfd, info, notice_as_needed)) |
9af2a943 | 4138 | goto error_free_vers; |
5061a885 | 4139 | |
f45794cb AM |
4140 | /* Clone the symbol table. Remember some pointers into the |
4141 | symbol table, and dynamic symbol count. */ | |
4142 | old_ent = (char *) old_tab + tabsize; | |
66eb6687 | 4143 | memcpy (old_tab, htab->root.table.table, tabsize); |
66eb6687 AM |
4144 | old_undefs = htab->root.undefs; |
4145 | old_undefs_tail = htab->root.undefs_tail; | |
4f87808c AM |
4146 | old_table = htab->root.table.table; |
4147 | old_size = htab->root.table.size; | |
4148 | old_count = htab->root.table.count; | |
5b677558 AM |
4149 | old_strtab = _bfd_elf_strtab_save (htab->dynstr); |
4150 | if (old_strtab == NULL) | |
4151 | goto error_free_vers; | |
66eb6687 AM |
4152 | |
4153 | for (i = 0; i < htab->root.table.size; i++) | |
4154 | { | |
4155 | struct bfd_hash_entry *p; | |
2de92251 | 4156 | struct elf_link_hash_entry *h; |
66eb6687 AM |
4157 | |
4158 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
4159 | { | |
4160 | memcpy (old_ent, p, htab->root.table.entsize); | |
4161 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
4162 | h = (struct elf_link_hash_entry *) p; |
4163 | if (h->root.type == bfd_link_hash_warning) | |
4164 | { | |
4165 | memcpy (old_ent, h->root.u.i.link, htab->root.table.entsize); | |
4166 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
4167 | } | |
66eb6687 AM |
4168 | } |
4169 | } | |
4170 | } | |
4ad4eba5 | 4171 | |
66eb6687 | 4172 | weaks = NULL; |
4ad4eba5 AM |
4173 | ever = extversym != NULL ? extversym + extsymoff : NULL; |
4174 | for (isym = isymbuf, isymend = isymbuf + extsymcount; | |
4175 | isym < isymend; | |
4176 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
4177 | { | |
4178 | int bind; | |
4179 | bfd_vma value; | |
af44c138 | 4180 | asection *sec, *new_sec; |
4ad4eba5 AM |
4181 | flagword flags; |
4182 | const char *name; | |
4183 | struct elf_link_hash_entry *h; | |
90c984fc | 4184 | struct elf_link_hash_entry *hi; |
4ad4eba5 AM |
4185 | bfd_boolean definition; |
4186 | bfd_boolean size_change_ok; | |
4187 | bfd_boolean type_change_ok; | |
4188 | bfd_boolean new_weakdef; | |
37a9e49a L |
4189 | bfd_boolean new_weak; |
4190 | bfd_boolean old_weak; | |
4ad4eba5 | 4191 | bfd_boolean override; |
a4d8e49b | 4192 | bfd_boolean common; |
97196564 | 4193 | bfd_boolean discarded; |
4ad4eba5 AM |
4194 | unsigned int old_alignment; |
4195 | bfd *old_bfd; | |
6e33951e | 4196 | bfd_boolean matched; |
4ad4eba5 AM |
4197 | |
4198 | override = FALSE; | |
4199 | ||
4200 | flags = BSF_NO_FLAGS; | |
4201 | sec = NULL; | |
4202 | value = isym->st_value; | |
a4d8e49b | 4203 | common = bed->common_definition (isym); |
97196564 | 4204 | discarded = FALSE; |
4ad4eba5 AM |
4205 | |
4206 | bind = ELF_ST_BIND (isym->st_info); | |
3e7a7d11 | 4207 | switch (bind) |
4ad4eba5 | 4208 | { |
3e7a7d11 | 4209 | case STB_LOCAL: |
4ad4eba5 AM |
4210 | /* This should be impossible, since ELF requires that all |
4211 | global symbols follow all local symbols, and that sh_info | |
4212 | point to the first global symbol. Unfortunately, Irix 5 | |
4213 | screws this up. */ | |
4214 | continue; | |
3e7a7d11 NC |
4215 | |
4216 | case STB_GLOBAL: | |
a4d8e49b | 4217 | if (isym->st_shndx != SHN_UNDEF && !common) |
4ad4eba5 | 4218 | flags = BSF_GLOBAL; |
3e7a7d11 NC |
4219 | break; |
4220 | ||
4221 | case STB_WEAK: | |
4222 | flags = BSF_WEAK; | |
4223 | break; | |
4224 | ||
4225 | case STB_GNU_UNIQUE: | |
4226 | flags = BSF_GNU_UNIQUE; | |
4227 | break; | |
4228 | ||
4229 | default: | |
4ad4eba5 | 4230 | /* Leave it up to the processor backend. */ |
3e7a7d11 | 4231 | break; |
4ad4eba5 AM |
4232 | } |
4233 | ||
4234 | if (isym->st_shndx == SHN_UNDEF) | |
4235 | sec = bfd_und_section_ptr; | |
cb33740c AM |
4236 | else if (isym->st_shndx == SHN_ABS) |
4237 | sec = bfd_abs_section_ptr; | |
4238 | else if (isym->st_shndx == SHN_COMMON) | |
4239 | { | |
4240 | sec = bfd_com_section_ptr; | |
4241 | /* What ELF calls the size we call the value. What ELF | |
4242 | calls the value we call the alignment. */ | |
4243 | value = isym->st_size; | |
4244 | } | |
4245 | else | |
4ad4eba5 AM |
4246 | { |
4247 | sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
4248 | if (sec == NULL) | |
4249 | sec = bfd_abs_section_ptr; | |
dbaa2011 | 4250 | else if (discarded_section (sec)) |
529fcb95 | 4251 | { |
e5d08002 L |
4252 | /* Symbols from discarded section are undefined. We keep |
4253 | its visibility. */ | |
529fcb95 | 4254 | sec = bfd_und_section_ptr; |
97196564 | 4255 | discarded = TRUE; |
529fcb95 PB |
4256 | isym->st_shndx = SHN_UNDEF; |
4257 | } | |
4ad4eba5 AM |
4258 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
4259 | value -= sec->vma; | |
4260 | } | |
4ad4eba5 AM |
4261 | |
4262 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
4263 | isym->st_name); | |
4264 | if (name == NULL) | |
4265 | goto error_free_vers; | |
4266 | ||
4267 | if (isym->st_shndx == SHN_COMMON | |
02d00247 AM |
4268 | && (abfd->flags & BFD_PLUGIN) != 0) |
4269 | { | |
4270 | asection *xc = bfd_get_section_by_name (abfd, "COMMON"); | |
4271 | ||
4272 | if (xc == NULL) | |
4273 | { | |
4274 | flagword sflags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP | |
4275 | | SEC_EXCLUDE); | |
4276 | xc = bfd_make_section_with_flags (abfd, "COMMON", sflags); | |
4277 | if (xc == NULL) | |
4278 | goto error_free_vers; | |
4279 | } | |
4280 | sec = xc; | |
4281 | } | |
4282 | else if (isym->st_shndx == SHN_COMMON | |
4283 | && ELF_ST_TYPE (isym->st_info) == STT_TLS | |
0e1862bb | 4284 | && !bfd_link_relocatable (info)) |
4ad4eba5 AM |
4285 | { |
4286 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
4287 | ||
4288 | if (tcomm == NULL) | |
4289 | { | |
02d00247 AM |
4290 | flagword sflags = (SEC_ALLOC | SEC_THREAD_LOCAL | SEC_IS_COMMON |
4291 | | SEC_LINKER_CREATED); | |
4292 | tcomm = bfd_make_section_with_flags (abfd, ".tcommon", sflags); | |
3496cb2a | 4293 | if (tcomm == NULL) |
4ad4eba5 AM |
4294 | goto error_free_vers; |
4295 | } | |
4296 | sec = tcomm; | |
4297 | } | |
66eb6687 | 4298 | else if (bed->elf_add_symbol_hook) |
4ad4eba5 | 4299 | { |
66eb6687 AM |
4300 | if (! (*bed->elf_add_symbol_hook) (abfd, info, isym, &name, &flags, |
4301 | &sec, &value)) | |
4ad4eba5 AM |
4302 | goto error_free_vers; |
4303 | ||
4304 | /* The hook function sets the name to NULL if this symbol | |
4305 | should be skipped for some reason. */ | |
4306 | if (name == NULL) | |
4307 | continue; | |
4308 | } | |
4309 | ||
4310 | /* Sanity check that all possibilities were handled. */ | |
4311 | if (sec == NULL) | |
4312 | { | |
4313 | bfd_set_error (bfd_error_bad_value); | |
4314 | goto error_free_vers; | |
4315 | } | |
4316 | ||
191c0c42 AM |
4317 | /* Silently discard TLS symbols from --just-syms. There's |
4318 | no way to combine a static TLS block with a new TLS block | |
4319 | for this executable. */ | |
4320 | if (ELF_ST_TYPE (isym->st_info) == STT_TLS | |
4321 | && sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
4322 | continue; | |
4323 | ||
4ad4eba5 AM |
4324 | if (bfd_is_und_section (sec) |
4325 | || bfd_is_com_section (sec)) | |
4326 | definition = FALSE; | |
4327 | else | |
4328 | definition = TRUE; | |
4329 | ||
4330 | size_change_ok = FALSE; | |
66eb6687 | 4331 | type_change_ok = bed->type_change_ok; |
37a9e49a | 4332 | old_weak = FALSE; |
6e33951e | 4333 | matched = FALSE; |
4ad4eba5 AM |
4334 | old_alignment = 0; |
4335 | old_bfd = NULL; | |
af44c138 | 4336 | new_sec = sec; |
4ad4eba5 | 4337 | |
66eb6687 | 4338 | if (is_elf_hash_table (htab)) |
4ad4eba5 AM |
4339 | { |
4340 | Elf_Internal_Versym iver; | |
4341 | unsigned int vernum = 0; | |
4342 | bfd_boolean skip; | |
4343 | ||
fc0e6df6 | 4344 | if (ever == NULL) |
4ad4eba5 | 4345 | { |
fc0e6df6 PB |
4346 | if (info->default_imported_symver) |
4347 | /* Use the default symbol version created earlier. */ | |
4348 | iver.vs_vers = elf_tdata (abfd)->cverdefs; | |
4349 | else | |
4350 | iver.vs_vers = 0; | |
4351 | } | |
4352 | else | |
4353 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
4354 | ||
4355 | vernum = iver.vs_vers & VERSYM_VERSION; | |
4356 | ||
4357 | /* If this is a hidden symbol, or if it is not version | |
4358 | 1, we append the version name to the symbol name. | |
cc86ff91 EB |
4359 | However, we do not modify a non-hidden absolute symbol |
4360 | if it is not a function, because it might be the version | |
4361 | symbol itself. FIXME: What if it isn't? */ | |
fc0e6df6 | 4362 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 |
fcb93ecf PB |
4363 | || (vernum > 1 |
4364 | && (!bfd_is_abs_section (sec) | |
4365 | || bed->is_function_type (ELF_ST_TYPE (isym->st_info))))) | |
fc0e6df6 PB |
4366 | { |
4367 | const char *verstr; | |
4368 | size_t namelen, verlen, newlen; | |
4369 | char *newname, *p; | |
4370 | ||
4371 | if (isym->st_shndx != SHN_UNDEF) | |
4ad4eba5 | 4372 | { |
fc0e6df6 PB |
4373 | if (vernum > elf_tdata (abfd)->cverdefs) |
4374 | verstr = NULL; | |
4375 | else if (vernum > 1) | |
4376 | verstr = | |
4377 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
4378 | else | |
4379 | verstr = ""; | |
4ad4eba5 | 4380 | |
fc0e6df6 | 4381 | if (verstr == NULL) |
4ad4eba5 | 4382 | { |
4eca0228 | 4383 | _bfd_error_handler |
695344c0 | 4384 | /* xgettext:c-format */ |
fc0e6df6 PB |
4385 | (_("%B: %s: invalid version %u (max %d)"), |
4386 | abfd, name, vernum, | |
4387 | elf_tdata (abfd)->cverdefs); | |
4388 | bfd_set_error (bfd_error_bad_value); | |
4389 | goto error_free_vers; | |
4ad4eba5 | 4390 | } |
fc0e6df6 PB |
4391 | } |
4392 | else | |
4393 | { | |
4394 | /* We cannot simply test for the number of | |
4395 | entries in the VERNEED section since the | |
4396 | numbers for the needed versions do not start | |
4397 | at 0. */ | |
4398 | Elf_Internal_Verneed *t; | |
4399 | ||
4400 | verstr = NULL; | |
4401 | for (t = elf_tdata (abfd)->verref; | |
4402 | t != NULL; | |
4403 | t = t->vn_nextref) | |
4ad4eba5 | 4404 | { |
fc0e6df6 | 4405 | Elf_Internal_Vernaux *a; |
4ad4eba5 | 4406 | |
fc0e6df6 PB |
4407 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) |
4408 | { | |
4409 | if (a->vna_other == vernum) | |
4ad4eba5 | 4410 | { |
fc0e6df6 PB |
4411 | verstr = a->vna_nodename; |
4412 | break; | |
4ad4eba5 | 4413 | } |
4ad4eba5 | 4414 | } |
fc0e6df6 PB |
4415 | if (a != NULL) |
4416 | break; | |
4417 | } | |
4418 | if (verstr == NULL) | |
4419 | { | |
4eca0228 | 4420 | _bfd_error_handler |
695344c0 | 4421 | /* xgettext:c-format */ |
fc0e6df6 PB |
4422 | (_("%B: %s: invalid needed version %d"), |
4423 | abfd, name, vernum); | |
4424 | bfd_set_error (bfd_error_bad_value); | |
4425 | goto error_free_vers; | |
4ad4eba5 | 4426 | } |
4ad4eba5 | 4427 | } |
fc0e6df6 PB |
4428 | |
4429 | namelen = strlen (name); | |
4430 | verlen = strlen (verstr); | |
4431 | newlen = namelen + verlen + 2; | |
4432 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4433 | && isym->st_shndx != SHN_UNDEF) | |
4434 | ++newlen; | |
4435 | ||
a50b1753 | 4436 | newname = (char *) bfd_hash_allocate (&htab->root.table, newlen); |
fc0e6df6 PB |
4437 | if (newname == NULL) |
4438 | goto error_free_vers; | |
4439 | memcpy (newname, name, namelen); | |
4440 | p = newname + namelen; | |
4441 | *p++ = ELF_VER_CHR; | |
4442 | /* If this is a defined non-hidden version symbol, | |
4443 | we add another @ to the name. This indicates the | |
4444 | default version of the symbol. */ | |
4445 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4446 | && isym->st_shndx != SHN_UNDEF) | |
4447 | *p++ = ELF_VER_CHR; | |
4448 | memcpy (p, verstr, verlen + 1); | |
4449 | ||
4450 | name = newname; | |
4ad4eba5 AM |
4451 | } |
4452 | ||
cd3416da AM |
4453 | /* If this symbol has default visibility and the user has |
4454 | requested we not re-export it, then mark it as hidden. */ | |
a0d49154 | 4455 | if (!bfd_is_und_section (sec) |
cd3416da | 4456 | && !dynamic |
ce875075 | 4457 | && abfd->no_export |
cd3416da AM |
4458 | && ELF_ST_VISIBILITY (isym->st_other) != STV_INTERNAL) |
4459 | isym->st_other = (STV_HIDDEN | |
4460 | | (isym->st_other & ~ELF_ST_VISIBILITY (-1))); | |
4461 | ||
4f3fedcf AM |
4462 | if (!_bfd_elf_merge_symbol (abfd, info, name, isym, &sec, &value, |
4463 | sym_hash, &old_bfd, &old_weak, | |
4464 | &old_alignment, &skip, &override, | |
6e33951e L |
4465 | &type_change_ok, &size_change_ok, |
4466 | &matched)) | |
4ad4eba5 AM |
4467 | goto error_free_vers; |
4468 | ||
4469 | if (skip) | |
4470 | continue; | |
4471 | ||
6e33951e L |
4472 | /* Override a definition only if the new symbol matches the |
4473 | existing one. */ | |
4474 | if (override && matched) | |
4ad4eba5 AM |
4475 | definition = FALSE; |
4476 | ||
4477 | h = *sym_hash; | |
4478 | while (h->root.type == bfd_link_hash_indirect | |
4479 | || h->root.type == bfd_link_hash_warning) | |
4480 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4481 | ||
4ad4eba5 | 4482 | if (elf_tdata (abfd)->verdef != NULL |
4ad4eba5 AM |
4483 | && vernum > 1 |
4484 | && definition) | |
4485 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
4486 | } | |
4487 | ||
4488 | if (! (_bfd_generic_link_add_one_symbol | |
66eb6687 | 4489 | (info, abfd, name, flags, sec, value, NULL, FALSE, bed->collect, |
4ad4eba5 AM |
4490 | (struct bfd_link_hash_entry **) sym_hash))) |
4491 | goto error_free_vers; | |
4492 | ||
a43942db MR |
4493 | if ((flags & BSF_GNU_UNIQUE) |
4494 | && (abfd->flags & DYNAMIC) == 0 | |
4495 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
4496 | elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_unique; | |
4497 | ||
4ad4eba5 | 4498 | h = *sym_hash; |
90c984fc L |
4499 | /* We need to make sure that indirect symbol dynamic flags are |
4500 | updated. */ | |
4501 | hi = h; | |
4ad4eba5 AM |
4502 | while (h->root.type == bfd_link_hash_indirect |
4503 | || h->root.type == bfd_link_hash_warning) | |
4504 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3e7a7d11 | 4505 | |
97196564 L |
4506 | /* Setting the index to -3 tells elf_link_output_extsym that |
4507 | this symbol is defined in a discarded section. */ | |
4508 | if (discarded) | |
4509 | h->indx = -3; | |
4510 | ||
4ad4eba5 AM |
4511 | *sym_hash = h; |
4512 | ||
37a9e49a | 4513 | new_weak = (flags & BSF_WEAK) != 0; |
4ad4eba5 AM |
4514 | new_weakdef = FALSE; |
4515 | if (dynamic | |
4516 | && definition | |
37a9e49a | 4517 | && new_weak |
fcb93ecf | 4518 | && !bed->is_function_type (ELF_ST_TYPE (isym->st_info)) |
66eb6687 | 4519 | && is_elf_hash_table (htab) |
f6e332e6 | 4520 | && h->u.weakdef == NULL) |
4ad4eba5 AM |
4521 | { |
4522 | /* Keep a list of all weak defined non function symbols from | |
4523 | a dynamic object, using the weakdef field. Later in this | |
4524 | function we will set the weakdef field to the correct | |
4525 | value. We only put non-function symbols from dynamic | |
4526 | objects on this list, because that happens to be the only | |
4527 | time we need to know the normal symbol corresponding to a | |
4528 | weak symbol, and the information is time consuming to | |
4529 | figure out. If the weakdef field is not already NULL, | |
4530 | then this symbol was already defined by some previous | |
4531 | dynamic object, and we will be using that previous | |
4532 | definition anyhow. */ | |
4533 | ||
f6e332e6 | 4534 | h->u.weakdef = weaks; |
4ad4eba5 AM |
4535 | weaks = h; |
4536 | new_weakdef = TRUE; | |
4537 | } | |
4538 | ||
4539 | /* Set the alignment of a common symbol. */ | |
a4d8e49b | 4540 | if ((common || bfd_is_com_section (sec)) |
4ad4eba5 AM |
4541 | && h->root.type == bfd_link_hash_common) |
4542 | { | |
4543 | unsigned int align; | |
4544 | ||
a4d8e49b | 4545 | if (common) |
af44c138 L |
4546 | align = bfd_log2 (isym->st_value); |
4547 | else | |
4548 | { | |
4549 | /* The new symbol is a common symbol in a shared object. | |
4550 | We need to get the alignment from the section. */ | |
4551 | align = new_sec->alignment_power; | |
4552 | } | |
595213d4 | 4553 | if (align > old_alignment) |
4ad4eba5 AM |
4554 | h->root.u.c.p->alignment_power = align; |
4555 | else | |
4556 | h->root.u.c.p->alignment_power = old_alignment; | |
4557 | } | |
4558 | ||
66eb6687 | 4559 | if (is_elf_hash_table (htab)) |
4ad4eba5 | 4560 | { |
4f3fedcf AM |
4561 | /* Set a flag in the hash table entry indicating the type of |
4562 | reference or definition we just found. A dynamic symbol | |
4563 | is one which is referenced or defined by both a regular | |
4564 | object and a shared object. */ | |
4565 | bfd_boolean dynsym = FALSE; | |
4566 | ||
4567 | /* Plugin symbols aren't normal. Don't set def_regular or | |
4568 | ref_regular for them, or make them dynamic. */ | |
4569 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
4570 | ; | |
4571 | else if (! dynamic) | |
4572 | { | |
4573 | if (! definition) | |
4574 | { | |
4575 | h->ref_regular = 1; | |
4576 | if (bind != STB_WEAK) | |
4577 | h->ref_regular_nonweak = 1; | |
4578 | } | |
4579 | else | |
4580 | { | |
4581 | h->def_regular = 1; | |
4582 | if (h->def_dynamic) | |
4583 | { | |
4584 | h->def_dynamic = 0; | |
4585 | h->ref_dynamic = 1; | |
4586 | } | |
4587 | } | |
4588 | ||
4589 | /* If the indirect symbol has been forced local, don't | |
4590 | make the real symbol dynamic. */ | |
4591 | if ((h == hi || !hi->forced_local) | |
0e1862bb | 4592 | && (bfd_link_dll (info) |
4f3fedcf AM |
4593 | || h->def_dynamic |
4594 | || h->ref_dynamic)) | |
4595 | dynsym = TRUE; | |
4596 | } | |
4597 | else | |
4598 | { | |
4599 | if (! definition) | |
4600 | { | |
4601 | h->ref_dynamic = 1; | |
4602 | hi->ref_dynamic = 1; | |
4603 | } | |
4604 | else | |
4605 | { | |
4606 | h->def_dynamic = 1; | |
4607 | hi->def_dynamic = 1; | |
4608 | } | |
4609 | ||
4610 | /* If the indirect symbol has been forced local, don't | |
4611 | make the real symbol dynamic. */ | |
4612 | if ((h == hi || !hi->forced_local) | |
4613 | && (h->def_regular | |
4614 | || h->ref_regular | |
4615 | || (h->u.weakdef != NULL | |
4616 | && ! new_weakdef | |
4617 | && h->u.weakdef->dynindx != -1))) | |
4618 | dynsym = TRUE; | |
4619 | } | |
4620 | ||
4621 | /* Check to see if we need to add an indirect symbol for | |
4622 | the default name. */ | |
4623 | if (definition | |
4624 | || (!override && h->root.type == bfd_link_hash_common)) | |
4625 | if (!_bfd_elf_add_default_symbol (abfd, info, h, name, isym, | |
4626 | sec, value, &old_bfd, &dynsym)) | |
4627 | goto error_free_vers; | |
4ad4eba5 AM |
4628 | |
4629 | /* Check the alignment when a common symbol is involved. This | |
4630 | can change when a common symbol is overridden by a normal | |
4631 | definition or a common symbol is ignored due to the old | |
4632 | normal definition. We need to make sure the maximum | |
4633 | alignment is maintained. */ | |
a4d8e49b | 4634 | if ((old_alignment || common) |
4ad4eba5 AM |
4635 | && h->root.type != bfd_link_hash_common) |
4636 | { | |
4637 | unsigned int common_align; | |
4638 | unsigned int normal_align; | |
4639 | unsigned int symbol_align; | |
4640 | bfd *normal_bfd; | |
4641 | bfd *common_bfd; | |
4642 | ||
3a81e825 AM |
4643 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
4644 | || h->root.type == bfd_link_hash_defweak); | |
4645 | ||
4ad4eba5 AM |
4646 | symbol_align = ffs (h->root.u.def.value) - 1; |
4647 | if (h->root.u.def.section->owner != NULL | |
0616a280 AM |
4648 | && (h->root.u.def.section->owner->flags |
4649 | & (DYNAMIC | BFD_PLUGIN)) == 0) | |
4ad4eba5 AM |
4650 | { |
4651 | normal_align = h->root.u.def.section->alignment_power; | |
4652 | if (normal_align > symbol_align) | |
4653 | normal_align = symbol_align; | |
4654 | } | |
4655 | else | |
4656 | normal_align = symbol_align; | |
4657 | ||
4658 | if (old_alignment) | |
4659 | { | |
4660 | common_align = old_alignment; | |
4661 | common_bfd = old_bfd; | |
4662 | normal_bfd = abfd; | |
4663 | } | |
4664 | else | |
4665 | { | |
4666 | common_align = bfd_log2 (isym->st_value); | |
4667 | common_bfd = abfd; | |
4668 | normal_bfd = old_bfd; | |
4669 | } | |
4670 | ||
4671 | if (normal_align < common_align) | |
d07676f8 NC |
4672 | { |
4673 | /* PR binutils/2735 */ | |
4674 | if (normal_bfd == NULL) | |
4eca0228 | 4675 | _bfd_error_handler |
695344c0 | 4676 | /* xgettext:c-format */ |
4f3fedcf AM |
4677 | (_("Warning: alignment %u of common symbol `%s' in %B is" |
4678 | " greater than the alignment (%u) of its section %A"), | |
d07676f8 NC |
4679 | common_bfd, h->root.u.def.section, |
4680 | 1 << common_align, name, 1 << normal_align); | |
4681 | else | |
4eca0228 | 4682 | _bfd_error_handler |
695344c0 | 4683 | /* xgettext:c-format */ |
d07676f8 NC |
4684 | (_("Warning: alignment %u of symbol `%s' in %B" |
4685 | " is smaller than %u in %B"), | |
4686 | normal_bfd, common_bfd, | |
4687 | 1 << normal_align, name, 1 << common_align); | |
4688 | } | |
4ad4eba5 AM |
4689 | } |
4690 | ||
83ad0046 | 4691 | /* Remember the symbol size if it isn't undefined. */ |
3a81e825 AM |
4692 | if (isym->st_size != 0 |
4693 | && isym->st_shndx != SHN_UNDEF | |
4ad4eba5 AM |
4694 | && (definition || h->size == 0)) |
4695 | { | |
83ad0046 L |
4696 | if (h->size != 0 |
4697 | && h->size != isym->st_size | |
4698 | && ! size_change_ok) | |
4eca0228 | 4699 | _bfd_error_handler |
695344c0 | 4700 | /* xgettext:c-format */ |
d003868e AM |
4701 | (_("Warning: size of symbol `%s' changed" |
4702 | " from %lu in %B to %lu in %B"), | |
4703 | old_bfd, abfd, | |
4ad4eba5 | 4704 | name, (unsigned long) h->size, |
d003868e | 4705 | (unsigned long) isym->st_size); |
4ad4eba5 AM |
4706 | |
4707 | h->size = isym->st_size; | |
4708 | } | |
4709 | ||
4710 | /* If this is a common symbol, then we always want H->SIZE | |
4711 | to be the size of the common symbol. The code just above | |
4712 | won't fix the size if a common symbol becomes larger. We | |
4713 | don't warn about a size change here, because that is | |
4f3fedcf | 4714 | covered by --warn-common. Allow changes between different |
fcb93ecf | 4715 | function types. */ |
4ad4eba5 AM |
4716 | if (h->root.type == bfd_link_hash_common) |
4717 | h->size = h->root.u.c.size; | |
4718 | ||
4719 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE | |
37a9e49a L |
4720 | && ((definition && !new_weak) |
4721 | || (old_weak && h->root.type == bfd_link_hash_common) | |
4722 | || h->type == STT_NOTYPE)) | |
4ad4eba5 | 4723 | { |
2955ec4c L |
4724 | unsigned int type = ELF_ST_TYPE (isym->st_info); |
4725 | ||
4726 | /* Turn an IFUNC symbol from a DSO into a normal FUNC | |
4727 | symbol. */ | |
4728 | if (type == STT_GNU_IFUNC | |
4729 | && (abfd->flags & DYNAMIC) != 0) | |
4730 | type = STT_FUNC; | |
4ad4eba5 | 4731 | |
2955ec4c L |
4732 | if (h->type != type) |
4733 | { | |
4734 | if (h->type != STT_NOTYPE && ! type_change_ok) | |
695344c0 | 4735 | /* xgettext:c-format */ |
4eca0228 | 4736 | _bfd_error_handler |
2955ec4c L |
4737 | (_("Warning: type of symbol `%s' changed" |
4738 | " from %d to %d in %B"), | |
4739 | abfd, name, h->type, type); | |
4740 | ||
4741 | h->type = type; | |
4742 | } | |
4ad4eba5 AM |
4743 | } |
4744 | ||
54ac0771 | 4745 | /* Merge st_other field. */ |
b8417128 | 4746 | elf_merge_st_other (abfd, h, isym, sec, definition, dynamic); |
4ad4eba5 | 4747 | |
c3df8c14 | 4748 | /* We don't want to make debug symbol dynamic. */ |
0e1862bb L |
4749 | if (definition |
4750 | && (sec->flags & SEC_DEBUGGING) | |
4751 | && !bfd_link_relocatable (info)) | |
c3df8c14 AM |
4752 | dynsym = FALSE; |
4753 | ||
4f3fedcf AM |
4754 | /* Nor should we make plugin symbols dynamic. */ |
4755 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
4756 | dynsym = FALSE; | |
4757 | ||
35fc36a8 | 4758 | if (definition) |
35399224 L |
4759 | { |
4760 | h->target_internal = isym->st_target_internal; | |
4761 | h->unique_global = (flags & BSF_GNU_UNIQUE) != 0; | |
4762 | } | |
35fc36a8 | 4763 | |
4ad4eba5 AM |
4764 | if (definition && !dynamic) |
4765 | { | |
4766 | char *p = strchr (name, ELF_VER_CHR); | |
4767 | if (p != NULL && p[1] != ELF_VER_CHR) | |
4768 | { | |
4769 | /* Queue non-default versions so that .symver x, x@FOO | |
4770 | aliases can be checked. */ | |
66eb6687 | 4771 | if (!nondeflt_vers) |
4ad4eba5 | 4772 | { |
66eb6687 AM |
4773 | amt = ((isymend - isym + 1) |
4774 | * sizeof (struct elf_link_hash_entry *)); | |
ca4be51c AM |
4775 | nondeflt_vers |
4776 | = (struct elf_link_hash_entry **) bfd_malloc (amt); | |
14b1c01e AM |
4777 | if (!nondeflt_vers) |
4778 | goto error_free_vers; | |
4ad4eba5 | 4779 | } |
66eb6687 | 4780 | nondeflt_vers[nondeflt_vers_cnt++] = h; |
4ad4eba5 AM |
4781 | } |
4782 | } | |
4783 | ||
4784 | if (dynsym && h->dynindx == -1) | |
4785 | { | |
c152c796 | 4786 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4ad4eba5 | 4787 | goto error_free_vers; |
f6e332e6 | 4788 | if (h->u.weakdef != NULL |
4ad4eba5 | 4789 | && ! new_weakdef |
f6e332e6 | 4790 | && h->u.weakdef->dynindx == -1) |
4ad4eba5 | 4791 | { |
66eb6687 | 4792 | if (!bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef)) |
4ad4eba5 AM |
4793 | goto error_free_vers; |
4794 | } | |
4795 | } | |
1f599d0e | 4796 | else if (h->dynindx != -1) |
4ad4eba5 AM |
4797 | /* If the symbol already has a dynamic index, but |
4798 | visibility says it should not be visible, turn it into | |
4799 | a local symbol. */ | |
4800 | switch (ELF_ST_VISIBILITY (h->other)) | |
4801 | { | |
4802 | case STV_INTERNAL: | |
4803 | case STV_HIDDEN: | |
4804 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
4805 | dynsym = FALSE; | |
4806 | break; | |
4807 | } | |
4808 | ||
aef28989 L |
4809 | /* Don't add DT_NEEDED for references from the dummy bfd nor |
4810 | for unmatched symbol. */ | |
4ad4eba5 | 4811 | if (!add_needed |
aef28989 | 4812 | && matched |
4ad4eba5 | 4813 | && definition |
010e5ae2 | 4814 | && ((dynsym |
ffa9430d | 4815 | && h->ref_regular_nonweak |
4f3fedcf AM |
4816 | && (old_bfd == NULL |
4817 | || (old_bfd->flags & BFD_PLUGIN) == 0)) | |
ffa9430d | 4818 | || (h->ref_dynamic_nonweak |
010e5ae2 | 4819 | && (elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0 |
7b15fa7a AM |
4820 | && !on_needed_list (elf_dt_name (abfd), |
4821 | htab->needed, NULL)))) | |
4ad4eba5 AM |
4822 | { |
4823 | int ret; | |
4824 | const char *soname = elf_dt_name (abfd); | |
4825 | ||
16e4ecc0 AM |
4826 | info->callbacks->minfo ("%!", soname, old_bfd, |
4827 | h->root.root.string); | |
4828 | ||
4ad4eba5 AM |
4829 | /* A symbol from a library loaded via DT_NEEDED of some |
4830 | other library is referenced by a regular object. | |
e56f61be | 4831 | Add a DT_NEEDED entry for it. Issue an error if |
b918acf9 NC |
4832 | --no-add-needed is used and the reference was not |
4833 | a weak one. */ | |
4f3fedcf | 4834 | if (old_bfd != NULL |
b918acf9 | 4835 | && (elf_dyn_lib_class (abfd) & DYN_NO_NEEDED) != 0) |
e56f61be | 4836 | { |
4eca0228 | 4837 | _bfd_error_handler |
695344c0 | 4838 | /* xgettext:c-format */ |
3cbc5de0 | 4839 | (_("%B: undefined reference to symbol '%s'"), |
4f3fedcf | 4840 | old_bfd, name); |
ff5ac77b | 4841 | bfd_set_error (bfd_error_missing_dso); |
e56f61be L |
4842 | goto error_free_vers; |
4843 | } | |
4844 | ||
a50b1753 | 4845 | elf_dyn_lib_class (abfd) = (enum dynamic_lib_link_class) |
ca4be51c | 4846 | (elf_dyn_lib_class (abfd) & ~DYN_AS_NEEDED); |
a5db907e | 4847 | |
4ad4eba5 | 4848 | add_needed = TRUE; |
7e9f0867 | 4849 | ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed); |
4ad4eba5 AM |
4850 | if (ret < 0) |
4851 | goto error_free_vers; | |
4852 | ||
4853 | BFD_ASSERT (ret == 0); | |
4854 | } | |
4855 | } | |
4856 | } | |
4857 | ||
66eb6687 AM |
4858 | if (extversym != NULL) |
4859 | { | |
4860 | free (extversym); | |
4861 | extversym = NULL; | |
4862 | } | |
4863 | ||
4864 | if (isymbuf != NULL) | |
4865 | { | |
4866 | free (isymbuf); | |
4867 | isymbuf = NULL; | |
4868 | } | |
4869 | ||
4870 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
4871 | { | |
4872 | unsigned int i; | |
4873 | ||
4874 | /* Restore the symbol table. */ | |
f45794cb AM |
4875 | old_ent = (char *) old_tab + tabsize; |
4876 | memset (elf_sym_hashes (abfd), 0, | |
4877 | extsymcount * sizeof (struct elf_link_hash_entry *)); | |
4f87808c AM |
4878 | htab->root.table.table = old_table; |
4879 | htab->root.table.size = old_size; | |
4880 | htab->root.table.count = old_count; | |
66eb6687 | 4881 | memcpy (htab->root.table.table, old_tab, tabsize); |
66eb6687 AM |
4882 | htab->root.undefs = old_undefs; |
4883 | htab->root.undefs_tail = old_undefs_tail; | |
5b677558 AM |
4884 | _bfd_elf_strtab_restore (htab->dynstr, old_strtab); |
4885 | free (old_strtab); | |
4886 | old_strtab = NULL; | |
66eb6687 AM |
4887 | for (i = 0; i < htab->root.table.size; i++) |
4888 | { | |
4889 | struct bfd_hash_entry *p; | |
4890 | struct elf_link_hash_entry *h; | |
3e0882af L |
4891 | bfd_size_type size; |
4892 | unsigned int alignment_power; | |
66eb6687 AM |
4893 | |
4894 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
4895 | { | |
4896 | h = (struct elf_link_hash_entry *) p; | |
2de92251 AM |
4897 | if (h->root.type == bfd_link_hash_warning) |
4898 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2de92251 | 4899 | |
3e0882af L |
4900 | /* Preserve the maximum alignment and size for common |
4901 | symbols even if this dynamic lib isn't on DT_NEEDED | |
a4542f1b | 4902 | since it can still be loaded at run time by another |
3e0882af L |
4903 | dynamic lib. */ |
4904 | if (h->root.type == bfd_link_hash_common) | |
4905 | { | |
4906 | size = h->root.u.c.size; | |
4907 | alignment_power = h->root.u.c.p->alignment_power; | |
4908 | } | |
4909 | else | |
4910 | { | |
4911 | size = 0; | |
4912 | alignment_power = 0; | |
4913 | } | |
66eb6687 AM |
4914 | memcpy (p, old_ent, htab->root.table.entsize); |
4915 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
4916 | h = (struct elf_link_hash_entry *) p; |
4917 | if (h->root.type == bfd_link_hash_warning) | |
4918 | { | |
4919 | memcpy (h->root.u.i.link, old_ent, htab->root.table.entsize); | |
4920 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
a4542f1b | 4921 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
2de92251 | 4922 | } |
a4542f1b | 4923 | if (h->root.type == bfd_link_hash_common) |
3e0882af L |
4924 | { |
4925 | if (size > h->root.u.c.size) | |
4926 | h->root.u.c.size = size; | |
4927 | if (alignment_power > h->root.u.c.p->alignment_power) | |
4928 | h->root.u.c.p->alignment_power = alignment_power; | |
4929 | } | |
66eb6687 AM |
4930 | } |
4931 | } | |
4932 | ||
5061a885 AM |
4933 | /* Make a special call to the linker "notice" function to |
4934 | tell it that symbols added for crefs may need to be removed. */ | |
e5034e59 | 4935 | if (!(*bed->notice_as_needed) (abfd, info, notice_not_needed)) |
9af2a943 | 4936 | goto error_free_vers; |
5061a885 | 4937 | |
66eb6687 AM |
4938 | free (old_tab); |
4939 | objalloc_free_block ((struct objalloc *) htab->root.table.memory, | |
4940 | alloc_mark); | |
4941 | if (nondeflt_vers != NULL) | |
4942 | free (nondeflt_vers); | |
4943 | return TRUE; | |
4944 | } | |
2de92251 | 4945 | |
66eb6687 AM |
4946 | if (old_tab != NULL) |
4947 | { | |
e5034e59 | 4948 | if (!(*bed->notice_as_needed) (abfd, info, notice_needed)) |
9af2a943 | 4949 | goto error_free_vers; |
66eb6687 AM |
4950 | free (old_tab); |
4951 | old_tab = NULL; | |
4952 | } | |
4953 | ||
c6e8a9a8 L |
4954 | /* Now that all the symbols from this input file are created, if |
4955 | not performing a relocatable link, handle .symver foo, foo@BAR | |
4956 | such that any relocs against foo become foo@BAR. */ | |
0e1862bb | 4957 | if (!bfd_link_relocatable (info) && nondeflt_vers != NULL) |
4ad4eba5 | 4958 | { |
ef53be89 | 4959 | size_t cnt, symidx; |
4ad4eba5 AM |
4960 | |
4961 | for (cnt = 0; cnt < nondeflt_vers_cnt; ++cnt) | |
4962 | { | |
4963 | struct elf_link_hash_entry *h = nondeflt_vers[cnt], *hi; | |
4964 | char *shortname, *p; | |
4965 | ||
4966 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
4967 | if (p == NULL | |
4968 | || (h->root.type != bfd_link_hash_defined | |
4969 | && h->root.type != bfd_link_hash_defweak)) | |
4970 | continue; | |
4971 | ||
4972 | amt = p - h->root.root.string; | |
a50b1753 | 4973 | shortname = (char *) bfd_malloc (amt + 1); |
14b1c01e AM |
4974 | if (!shortname) |
4975 | goto error_free_vers; | |
4ad4eba5 AM |
4976 | memcpy (shortname, h->root.root.string, amt); |
4977 | shortname[amt] = '\0'; | |
4978 | ||
4979 | hi = (struct elf_link_hash_entry *) | |
66eb6687 | 4980 | bfd_link_hash_lookup (&htab->root, shortname, |
4ad4eba5 AM |
4981 | FALSE, FALSE, FALSE); |
4982 | if (hi != NULL | |
4983 | && hi->root.type == h->root.type | |
4984 | && hi->root.u.def.value == h->root.u.def.value | |
4985 | && hi->root.u.def.section == h->root.u.def.section) | |
4986 | { | |
4987 | (*bed->elf_backend_hide_symbol) (info, hi, TRUE); | |
4988 | hi->root.type = bfd_link_hash_indirect; | |
4989 | hi->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
fcfa13d2 | 4990 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
4ad4eba5 AM |
4991 | sym_hash = elf_sym_hashes (abfd); |
4992 | if (sym_hash) | |
4993 | for (symidx = 0; symidx < extsymcount; ++symidx) | |
4994 | if (sym_hash[symidx] == hi) | |
4995 | { | |
4996 | sym_hash[symidx] = h; | |
4997 | break; | |
4998 | } | |
4999 | } | |
5000 | free (shortname); | |
5001 | } | |
5002 | free (nondeflt_vers); | |
5003 | nondeflt_vers = NULL; | |
5004 | } | |
5005 | ||
4ad4eba5 AM |
5006 | /* Now set the weakdefs field correctly for all the weak defined |
5007 | symbols we found. The only way to do this is to search all the | |
5008 | symbols. Since we only need the information for non functions in | |
5009 | dynamic objects, that's the only time we actually put anything on | |
5010 | the list WEAKS. We need this information so that if a regular | |
5011 | object refers to a symbol defined weakly in a dynamic object, the | |
5012 | real symbol in the dynamic object is also put in the dynamic | |
5013 | symbols; we also must arrange for both symbols to point to the | |
5014 | same memory location. We could handle the general case of symbol | |
5015 | aliasing, but a general symbol alias can only be generated in | |
5016 | assembler code, handling it correctly would be very time | |
5017 | consuming, and other ELF linkers don't handle general aliasing | |
5018 | either. */ | |
5019 | if (weaks != NULL) | |
5020 | { | |
5021 | struct elf_link_hash_entry **hpp; | |
5022 | struct elf_link_hash_entry **hppend; | |
5023 | struct elf_link_hash_entry **sorted_sym_hash; | |
5024 | struct elf_link_hash_entry *h; | |
5025 | size_t sym_count; | |
5026 | ||
5027 | /* Since we have to search the whole symbol list for each weak | |
5028 | defined symbol, search time for N weak defined symbols will be | |
5029 | O(N^2). Binary search will cut it down to O(NlogN). */ | |
ef53be89 AM |
5030 | amt = extsymcount; |
5031 | amt *= sizeof (struct elf_link_hash_entry *); | |
a50b1753 | 5032 | sorted_sym_hash = (struct elf_link_hash_entry **) bfd_malloc (amt); |
4ad4eba5 AM |
5033 | if (sorted_sym_hash == NULL) |
5034 | goto error_return; | |
5035 | sym_hash = sorted_sym_hash; | |
5036 | hpp = elf_sym_hashes (abfd); | |
5037 | hppend = hpp + extsymcount; | |
5038 | sym_count = 0; | |
5039 | for (; hpp < hppend; hpp++) | |
5040 | { | |
5041 | h = *hpp; | |
5042 | if (h != NULL | |
5043 | && h->root.type == bfd_link_hash_defined | |
fcb93ecf | 5044 | && !bed->is_function_type (h->type)) |
4ad4eba5 AM |
5045 | { |
5046 | *sym_hash = h; | |
5047 | sym_hash++; | |
5048 | sym_count++; | |
5049 | } | |
5050 | } | |
5051 | ||
5052 | qsort (sorted_sym_hash, sym_count, | |
5053 | sizeof (struct elf_link_hash_entry *), | |
5054 | elf_sort_symbol); | |
5055 | ||
5056 | while (weaks != NULL) | |
5057 | { | |
5058 | struct elf_link_hash_entry *hlook; | |
5059 | asection *slook; | |
5060 | bfd_vma vlook; | |
ed54588d | 5061 | size_t i, j, idx = 0; |
4ad4eba5 AM |
5062 | |
5063 | hlook = weaks; | |
f6e332e6 AM |
5064 | weaks = hlook->u.weakdef; |
5065 | hlook->u.weakdef = NULL; | |
4ad4eba5 AM |
5066 | |
5067 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
5068 | || hlook->root.type == bfd_link_hash_defweak | |
5069 | || hlook->root.type == bfd_link_hash_common | |
5070 | || hlook->root.type == bfd_link_hash_indirect); | |
5071 | slook = hlook->root.u.def.section; | |
5072 | vlook = hlook->root.u.def.value; | |
5073 | ||
4ad4eba5 AM |
5074 | i = 0; |
5075 | j = sym_count; | |
14160578 | 5076 | while (i != j) |
4ad4eba5 AM |
5077 | { |
5078 | bfd_signed_vma vdiff; | |
5079 | idx = (i + j) / 2; | |
14160578 | 5080 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
5081 | vdiff = vlook - h->root.u.def.value; |
5082 | if (vdiff < 0) | |
5083 | j = idx; | |
5084 | else if (vdiff > 0) | |
5085 | i = idx + 1; | |
5086 | else | |
5087 | { | |
d3435ae8 | 5088 | int sdiff = slook->id - h->root.u.def.section->id; |
4ad4eba5 AM |
5089 | if (sdiff < 0) |
5090 | j = idx; | |
5091 | else if (sdiff > 0) | |
5092 | i = idx + 1; | |
5093 | else | |
14160578 | 5094 | break; |
4ad4eba5 AM |
5095 | } |
5096 | } | |
5097 | ||
5098 | /* We didn't find a value/section match. */ | |
14160578 | 5099 | if (i == j) |
4ad4eba5 AM |
5100 | continue; |
5101 | ||
14160578 AM |
5102 | /* With multiple aliases, or when the weak symbol is already |
5103 | strongly defined, we have multiple matching symbols and | |
5104 | the binary search above may land on any of them. Step | |
5105 | one past the matching symbol(s). */ | |
5106 | while (++idx != j) | |
5107 | { | |
5108 | h = sorted_sym_hash[idx]; | |
5109 | if (h->root.u.def.section != slook | |
5110 | || h->root.u.def.value != vlook) | |
5111 | break; | |
5112 | } | |
5113 | ||
5114 | /* Now look back over the aliases. Since we sorted by size | |
5115 | as well as value and section, we'll choose the one with | |
5116 | the largest size. */ | |
5117 | while (idx-- != i) | |
4ad4eba5 | 5118 | { |
14160578 | 5119 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
5120 | |
5121 | /* Stop if value or section doesn't match. */ | |
14160578 AM |
5122 | if (h->root.u.def.section != slook |
5123 | || h->root.u.def.value != vlook) | |
4ad4eba5 AM |
5124 | break; |
5125 | else if (h != hlook) | |
5126 | { | |
f6e332e6 | 5127 | hlook->u.weakdef = h; |
4ad4eba5 AM |
5128 | |
5129 | /* If the weak definition is in the list of dynamic | |
5130 | symbols, make sure the real definition is put | |
5131 | there as well. */ | |
5132 | if (hlook->dynindx != -1 && h->dynindx == -1) | |
5133 | { | |
c152c796 | 5134 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4dd07732 AM |
5135 | { |
5136 | err_free_sym_hash: | |
5137 | free (sorted_sym_hash); | |
5138 | goto error_return; | |
5139 | } | |
4ad4eba5 AM |
5140 | } |
5141 | ||
5142 | /* If the real definition is in the list of dynamic | |
5143 | symbols, make sure the weak definition is put | |
5144 | there as well. If we don't do this, then the | |
5145 | dynamic loader might not merge the entries for the | |
5146 | real definition and the weak definition. */ | |
5147 | if (h->dynindx != -1 && hlook->dynindx == -1) | |
5148 | { | |
c152c796 | 5149 | if (! bfd_elf_link_record_dynamic_symbol (info, hlook)) |
4dd07732 | 5150 | goto err_free_sym_hash; |
4ad4eba5 AM |
5151 | } |
5152 | break; | |
5153 | } | |
5154 | } | |
5155 | } | |
5156 | ||
5157 | free (sorted_sym_hash); | |
5158 | } | |
5159 | ||
33177bb1 AM |
5160 | if (bed->check_directives |
5161 | && !(*bed->check_directives) (abfd, info)) | |
5162 | return FALSE; | |
85fbca6a | 5163 | |
d9689752 L |
5164 | if (!info->check_relocs_after_open_input |
5165 | && !_bfd_elf_link_check_relocs (abfd, info)) | |
5166 | return FALSE; | |
4ad4eba5 AM |
5167 | |
5168 | /* If this is a non-traditional link, try to optimize the handling | |
5169 | of the .stab/.stabstr sections. */ | |
5170 | if (! dynamic | |
5171 | && ! info->traditional_format | |
66eb6687 | 5172 | && is_elf_hash_table (htab) |
4ad4eba5 AM |
5173 | && (info->strip != strip_all && info->strip != strip_debugger)) |
5174 | { | |
5175 | asection *stabstr; | |
5176 | ||
5177 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
5178 | if (stabstr != NULL) | |
5179 | { | |
5180 | bfd_size_type string_offset = 0; | |
5181 | asection *stab; | |
5182 | ||
5183 | for (stab = abfd->sections; stab; stab = stab->next) | |
0112cd26 | 5184 | if (CONST_STRNEQ (stab->name, ".stab") |
4ad4eba5 AM |
5185 | && (!stab->name[5] || |
5186 | (stab->name[5] == '.' && ISDIGIT (stab->name[6]))) | |
5187 | && (stab->flags & SEC_MERGE) == 0 | |
5188 | && !bfd_is_abs_section (stab->output_section)) | |
5189 | { | |
5190 | struct bfd_elf_section_data *secdata; | |
5191 | ||
5192 | secdata = elf_section_data (stab); | |
66eb6687 AM |
5193 | if (! _bfd_link_section_stabs (abfd, &htab->stab_info, stab, |
5194 | stabstr, &secdata->sec_info, | |
4ad4eba5 AM |
5195 | &string_offset)) |
5196 | goto error_return; | |
5197 | if (secdata->sec_info) | |
dbaa2011 | 5198 | stab->sec_info_type = SEC_INFO_TYPE_STABS; |
4ad4eba5 AM |
5199 | } |
5200 | } | |
5201 | } | |
5202 | ||
66eb6687 | 5203 | if (is_elf_hash_table (htab) && add_needed) |
4ad4eba5 AM |
5204 | { |
5205 | /* Add this bfd to the loaded list. */ | |
5206 | struct elf_link_loaded_list *n; | |
5207 | ||
ca4be51c | 5208 | n = (struct elf_link_loaded_list *) bfd_alloc (abfd, sizeof (*n)); |
4ad4eba5 AM |
5209 | if (n == NULL) |
5210 | goto error_return; | |
5211 | n->abfd = abfd; | |
66eb6687 AM |
5212 | n->next = htab->loaded; |
5213 | htab->loaded = n; | |
4ad4eba5 AM |
5214 | } |
5215 | ||
5216 | return TRUE; | |
5217 | ||
5218 | error_free_vers: | |
66eb6687 AM |
5219 | if (old_tab != NULL) |
5220 | free (old_tab); | |
5b677558 AM |
5221 | if (old_strtab != NULL) |
5222 | free (old_strtab); | |
4ad4eba5 AM |
5223 | if (nondeflt_vers != NULL) |
5224 | free (nondeflt_vers); | |
5225 | if (extversym != NULL) | |
5226 | free (extversym); | |
5227 | error_free_sym: | |
5228 | if (isymbuf != NULL) | |
5229 | free (isymbuf); | |
5230 | error_return: | |
5231 | return FALSE; | |
5232 | } | |
5233 | ||
8387904d AM |
5234 | /* Return the linker hash table entry of a symbol that might be |
5235 | satisfied by an archive symbol. Return -1 on error. */ | |
5236 | ||
5237 | struct elf_link_hash_entry * | |
5238 | _bfd_elf_archive_symbol_lookup (bfd *abfd, | |
5239 | struct bfd_link_info *info, | |
5240 | const char *name) | |
5241 | { | |
5242 | struct elf_link_hash_entry *h; | |
5243 | char *p, *copy; | |
5244 | size_t len, first; | |
5245 | ||
2a41f396 | 5246 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, TRUE); |
8387904d AM |
5247 | if (h != NULL) |
5248 | return h; | |
5249 | ||
5250 | /* If this is a default version (the name contains @@), look up the | |
5251 | symbol again with only one `@' as well as without the version. | |
5252 | The effect is that references to the symbol with and without the | |
5253 | version will be matched by the default symbol in the archive. */ | |
5254 | ||
5255 | p = strchr (name, ELF_VER_CHR); | |
5256 | if (p == NULL || p[1] != ELF_VER_CHR) | |
5257 | return h; | |
5258 | ||
5259 | /* First check with only one `@'. */ | |
5260 | len = strlen (name); | |
a50b1753 | 5261 | copy = (char *) bfd_alloc (abfd, len); |
8387904d AM |
5262 | if (copy == NULL) |
5263 | return (struct elf_link_hash_entry *) 0 - 1; | |
5264 | ||
5265 | first = p - name + 1; | |
5266 | memcpy (copy, name, first); | |
5267 | memcpy (copy + first, name + first + 1, len - first); | |
5268 | ||
2a41f396 | 5269 | h = elf_link_hash_lookup (elf_hash_table (info), copy, FALSE, FALSE, TRUE); |
8387904d AM |
5270 | if (h == NULL) |
5271 | { | |
5272 | /* We also need to check references to the symbol without the | |
5273 | version. */ | |
5274 | copy[first - 1] = '\0'; | |
5275 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
2a41f396 | 5276 | FALSE, FALSE, TRUE); |
8387904d AM |
5277 | } |
5278 | ||
5279 | bfd_release (abfd, copy); | |
5280 | return h; | |
5281 | } | |
5282 | ||
0ad989f9 | 5283 | /* Add symbols from an ELF archive file to the linker hash table. We |
13e570f8 AM |
5284 | don't use _bfd_generic_link_add_archive_symbols because we need to |
5285 | handle versioned symbols. | |
0ad989f9 L |
5286 | |
5287 | Fortunately, ELF archive handling is simpler than that done by | |
5288 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
5289 | oddities. In ELF, if we find a symbol in the archive map, and the | |
5290 | symbol is currently undefined, we know that we must pull in that | |
5291 | object file. | |
5292 | ||
5293 | Unfortunately, we do have to make multiple passes over the symbol | |
5294 | table until nothing further is resolved. */ | |
5295 | ||
4ad4eba5 AM |
5296 | static bfd_boolean |
5297 | elf_link_add_archive_symbols (bfd *abfd, struct bfd_link_info *info) | |
0ad989f9 L |
5298 | { |
5299 | symindex c; | |
13e570f8 | 5300 | unsigned char *included = NULL; |
0ad989f9 L |
5301 | carsym *symdefs; |
5302 | bfd_boolean loop; | |
5303 | bfd_size_type amt; | |
8387904d AM |
5304 | const struct elf_backend_data *bed; |
5305 | struct elf_link_hash_entry * (*archive_symbol_lookup) | |
5306 | (bfd *, struct bfd_link_info *, const char *); | |
0ad989f9 L |
5307 | |
5308 | if (! bfd_has_map (abfd)) | |
5309 | { | |
5310 | /* An empty archive is a special case. */ | |
5311 | if (bfd_openr_next_archived_file (abfd, NULL) == NULL) | |
5312 | return TRUE; | |
5313 | bfd_set_error (bfd_error_no_armap); | |
5314 | return FALSE; | |
5315 | } | |
5316 | ||
5317 | /* Keep track of all symbols we know to be already defined, and all | |
5318 | files we know to be already included. This is to speed up the | |
5319 | second and subsequent passes. */ | |
5320 | c = bfd_ardata (abfd)->symdef_count; | |
5321 | if (c == 0) | |
5322 | return TRUE; | |
5323 | amt = c; | |
13e570f8 AM |
5324 | amt *= sizeof (*included); |
5325 | included = (unsigned char *) bfd_zmalloc (amt); | |
5326 | if (included == NULL) | |
5327 | return FALSE; | |
0ad989f9 L |
5328 | |
5329 | symdefs = bfd_ardata (abfd)->symdefs; | |
8387904d AM |
5330 | bed = get_elf_backend_data (abfd); |
5331 | archive_symbol_lookup = bed->elf_backend_archive_symbol_lookup; | |
0ad989f9 L |
5332 | |
5333 | do | |
5334 | { | |
5335 | file_ptr last; | |
5336 | symindex i; | |
5337 | carsym *symdef; | |
5338 | carsym *symdefend; | |
5339 | ||
5340 | loop = FALSE; | |
5341 | last = -1; | |
5342 | ||
5343 | symdef = symdefs; | |
5344 | symdefend = symdef + c; | |
5345 | for (i = 0; symdef < symdefend; symdef++, i++) | |
5346 | { | |
5347 | struct elf_link_hash_entry *h; | |
5348 | bfd *element; | |
5349 | struct bfd_link_hash_entry *undefs_tail; | |
5350 | symindex mark; | |
5351 | ||
13e570f8 | 5352 | if (included[i]) |
0ad989f9 L |
5353 | continue; |
5354 | if (symdef->file_offset == last) | |
5355 | { | |
5356 | included[i] = TRUE; | |
5357 | continue; | |
5358 | } | |
5359 | ||
8387904d AM |
5360 | h = archive_symbol_lookup (abfd, info, symdef->name); |
5361 | if (h == (struct elf_link_hash_entry *) 0 - 1) | |
5362 | goto error_return; | |
0ad989f9 L |
5363 | |
5364 | if (h == NULL) | |
5365 | continue; | |
5366 | ||
5367 | if (h->root.type == bfd_link_hash_common) | |
5368 | { | |
5369 | /* We currently have a common symbol. The archive map contains | |
5370 | a reference to this symbol, so we may want to include it. We | |
5371 | only want to include it however, if this archive element | |
5372 | contains a definition of the symbol, not just another common | |
5373 | declaration of it. | |
5374 | ||
5375 | Unfortunately some archivers (including GNU ar) will put | |
5376 | declarations of common symbols into their archive maps, as | |
5377 | well as real definitions, so we cannot just go by the archive | |
5378 | map alone. Instead we must read in the element's symbol | |
5379 | table and check that to see what kind of symbol definition | |
5380 | this is. */ | |
5381 | if (! elf_link_is_defined_archive_symbol (abfd, symdef)) | |
5382 | continue; | |
5383 | } | |
5384 | else if (h->root.type != bfd_link_hash_undefined) | |
5385 | { | |
5386 | if (h->root.type != bfd_link_hash_undefweak) | |
13e570f8 AM |
5387 | /* Symbol must be defined. Don't check it again. */ |
5388 | included[i] = TRUE; | |
0ad989f9 L |
5389 | continue; |
5390 | } | |
5391 | ||
5392 | /* We need to include this archive member. */ | |
5393 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
5394 | if (element == NULL) | |
5395 | goto error_return; | |
5396 | ||
5397 | if (! bfd_check_format (element, bfd_object)) | |
5398 | goto error_return; | |
5399 | ||
0ad989f9 L |
5400 | undefs_tail = info->hash->undefs_tail; |
5401 | ||
0e144ba7 AM |
5402 | if (!(*info->callbacks |
5403 | ->add_archive_element) (info, element, symdef->name, &element)) | |
b95a0a31 | 5404 | continue; |
0e144ba7 | 5405 | if (!bfd_link_add_symbols (element, info)) |
0ad989f9 L |
5406 | goto error_return; |
5407 | ||
5408 | /* If there are any new undefined symbols, we need to make | |
5409 | another pass through the archive in order to see whether | |
5410 | they can be defined. FIXME: This isn't perfect, because | |
5411 | common symbols wind up on undefs_tail and because an | |
5412 | undefined symbol which is defined later on in this pass | |
5413 | does not require another pass. This isn't a bug, but it | |
5414 | does make the code less efficient than it could be. */ | |
5415 | if (undefs_tail != info->hash->undefs_tail) | |
5416 | loop = TRUE; | |
5417 | ||
5418 | /* Look backward to mark all symbols from this object file | |
5419 | which we have already seen in this pass. */ | |
5420 | mark = i; | |
5421 | do | |
5422 | { | |
5423 | included[mark] = TRUE; | |
5424 | if (mark == 0) | |
5425 | break; | |
5426 | --mark; | |
5427 | } | |
5428 | while (symdefs[mark].file_offset == symdef->file_offset); | |
5429 | ||
5430 | /* We mark subsequent symbols from this object file as we go | |
5431 | on through the loop. */ | |
5432 | last = symdef->file_offset; | |
5433 | } | |
5434 | } | |
5435 | while (loop); | |
5436 | ||
0ad989f9 L |
5437 | free (included); |
5438 | ||
5439 | return TRUE; | |
5440 | ||
5441 | error_return: | |
0ad989f9 L |
5442 | if (included != NULL) |
5443 | free (included); | |
5444 | return FALSE; | |
5445 | } | |
4ad4eba5 AM |
5446 | |
5447 | /* Given an ELF BFD, add symbols to the global hash table as | |
5448 | appropriate. */ | |
5449 | ||
5450 | bfd_boolean | |
5451 | bfd_elf_link_add_symbols (bfd *abfd, struct bfd_link_info *info) | |
5452 | { | |
5453 | switch (bfd_get_format (abfd)) | |
5454 | { | |
5455 | case bfd_object: | |
5456 | return elf_link_add_object_symbols (abfd, info); | |
5457 | case bfd_archive: | |
5458 | return elf_link_add_archive_symbols (abfd, info); | |
5459 | default: | |
5460 | bfd_set_error (bfd_error_wrong_format); | |
5461 | return FALSE; | |
5462 | } | |
5463 | } | |
5a580b3a | 5464 | \f |
14b1c01e AM |
5465 | struct hash_codes_info |
5466 | { | |
5467 | unsigned long *hashcodes; | |
5468 | bfd_boolean error; | |
5469 | }; | |
a0c8462f | 5470 | |
5a580b3a AM |
5471 | /* This function will be called though elf_link_hash_traverse to store |
5472 | all hash value of the exported symbols in an array. */ | |
5473 | ||
5474 | static bfd_boolean | |
5475 | elf_collect_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5476 | { | |
a50b1753 | 5477 | struct hash_codes_info *inf = (struct hash_codes_info *) data; |
5a580b3a | 5478 | const char *name; |
5a580b3a AM |
5479 | unsigned long ha; |
5480 | char *alc = NULL; | |
5481 | ||
5a580b3a AM |
5482 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5483 | if (h->dynindx == -1) | |
5484 | return TRUE; | |
5485 | ||
5486 | name = h->root.root.string; | |
422f1182 | 5487 | if (h->versioned >= versioned) |
5a580b3a | 5488 | { |
422f1182 L |
5489 | char *p = strchr (name, ELF_VER_CHR); |
5490 | if (p != NULL) | |
14b1c01e | 5491 | { |
422f1182 L |
5492 | alc = (char *) bfd_malloc (p - name + 1); |
5493 | if (alc == NULL) | |
5494 | { | |
5495 | inf->error = TRUE; | |
5496 | return FALSE; | |
5497 | } | |
5498 | memcpy (alc, name, p - name); | |
5499 | alc[p - name] = '\0'; | |
5500 | name = alc; | |
14b1c01e | 5501 | } |
5a580b3a AM |
5502 | } |
5503 | ||
5504 | /* Compute the hash value. */ | |
5505 | ha = bfd_elf_hash (name); | |
5506 | ||
5507 | /* Store the found hash value in the array given as the argument. */ | |
14b1c01e | 5508 | *(inf->hashcodes)++ = ha; |
5a580b3a AM |
5509 | |
5510 | /* And store it in the struct so that we can put it in the hash table | |
5511 | later. */ | |
f6e332e6 | 5512 | h->u.elf_hash_value = ha; |
5a580b3a AM |
5513 | |
5514 | if (alc != NULL) | |
5515 | free (alc); | |
5516 | ||
5517 | return TRUE; | |
5518 | } | |
5519 | ||
fdc90cb4 JJ |
5520 | struct collect_gnu_hash_codes |
5521 | { | |
5522 | bfd *output_bfd; | |
5523 | const struct elf_backend_data *bed; | |
5524 | unsigned long int nsyms; | |
5525 | unsigned long int maskbits; | |
5526 | unsigned long int *hashcodes; | |
5527 | unsigned long int *hashval; | |
5528 | unsigned long int *indx; | |
5529 | unsigned long int *counts; | |
5530 | bfd_vma *bitmask; | |
5531 | bfd_byte *contents; | |
5532 | long int min_dynindx; | |
5533 | unsigned long int bucketcount; | |
5534 | unsigned long int symindx; | |
5535 | long int local_indx; | |
5536 | long int shift1, shift2; | |
5537 | unsigned long int mask; | |
14b1c01e | 5538 | bfd_boolean error; |
fdc90cb4 JJ |
5539 | }; |
5540 | ||
5541 | /* This function will be called though elf_link_hash_traverse to store | |
5542 | all hash value of the exported symbols in an array. */ | |
5543 | ||
5544 | static bfd_boolean | |
5545 | elf_collect_gnu_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5546 | { | |
a50b1753 | 5547 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 | 5548 | const char *name; |
fdc90cb4 JJ |
5549 | unsigned long ha; |
5550 | char *alc = NULL; | |
5551 | ||
fdc90cb4 JJ |
5552 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5553 | if (h->dynindx == -1) | |
5554 | return TRUE; | |
5555 | ||
5556 | /* Ignore also local symbols and undefined symbols. */ | |
5557 | if (! (*s->bed->elf_hash_symbol) (h)) | |
5558 | return TRUE; | |
5559 | ||
5560 | name = h->root.root.string; | |
422f1182 | 5561 | if (h->versioned >= versioned) |
fdc90cb4 | 5562 | { |
422f1182 L |
5563 | char *p = strchr (name, ELF_VER_CHR); |
5564 | if (p != NULL) | |
14b1c01e | 5565 | { |
422f1182 L |
5566 | alc = (char *) bfd_malloc (p - name + 1); |
5567 | if (alc == NULL) | |
5568 | { | |
5569 | s->error = TRUE; | |
5570 | return FALSE; | |
5571 | } | |
5572 | memcpy (alc, name, p - name); | |
5573 | alc[p - name] = '\0'; | |
5574 | name = alc; | |
14b1c01e | 5575 | } |
fdc90cb4 JJ |
5576 | } |
5577 | ||
5578 | /* Compute the hash value. */ | |
5579 | ha = bfd_elf_gnu_hash (name); | |
5580 | ||
5581 | /* Store the found hash value in the array for compute_bucket_count, | |
5582 | and also for .dynsym reordering purposes. */ | |
5583 | s->hashcodes[s->nsyms] = ha; | |
5584 | s->hashval[h->dynindx] = ha; | |
5585 | ++s->nsyms; | |
5586 | if (s->min_dynindx < 0 || s->min_dynindx > h->dynindx) | |
5587 | s->min_dynindx = h->dynindx; | |
5588 | ||
5589 | if (alc != NULL) | |
5590 | free (alc); | |
5591 | ||
5592 | return TRUE; | |
5593 | } | |
5594 | ||
5595 | /* This function will be called though elf_link_hash_traverse to do | |
5596 | final dynaminc symbol renumbering. */ | |
5597 | ||
5598 | static bfd_boolean | |
5599 | elf_renumber_gnu_hash_syms (struct elf_link_hash_entry *h, void *data) | |
5600 | { | |
a50b1753 | 5601 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 JJ |
5602 | unsigned long int bucket; |
5603 | unsigned long int val; | |
5604 | ||
fdc90cb4 JJ |
5605 | /* Ignore indirect symbols. */ |
5606 | if (h->dynindx == -1) | |
5607 | return TRUE; | |
5608 | ||
5609 | /* Ignore also local symbols and undefined symbols. */ | |
5610 | if (! (*s->bed->elf_hash_symbol) (h)) | |
5611 | { | |
5612 | if (h->dynindx >= s->min_dynindx) | |
5613 | h->dynindx = s->local_indx++; | |
5614 | return TRUE; | |
5615 | } | |
5616 | ||
5617 | bucket = s->hashval[h->dynindx] % s->bucketcount; | |
5618 | val = (s->hashval[h->dynindx] >> s->shift1) | |
5619 | & ((s->maskbits >> s->shift1) - 1); | |
5620 | s->bitmask[val] |= ((bfd_vma) 1) << (s->hashval[h->dynindx] & s->mask); | |
5621 | s->bitmask[val] | |
5622 | |= ((bfd_vma) 1) << ((s->hashval[h->dynindx] >> s->shift2) & s->mask); | |
5623 | val = s->hashval[h->dynindx] & ~(unsigned long int) 1; | |
5624 | if (s->counts[bucket] == 1) | |
5625 | /* Last element terminates the chain. */ | |
5626 | val |= 1; | |
5627 | bfd_put_32 (s->output_bfd, val, | |
5628 | s->contents + (s->indx[bucket] - s->symindx) * 4); | |
5629 | --s->counts[bucket]; | |
5630 | h->dynindx = s->indx[bucket]++; | |
5631 | return TRUE; | |
5632 | } | |
5633 | ||
5634 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ | |
5635 | ||
5636 | bfd_boolean | |
5637 | _bfd_elf_hash_symbol (struct elf_link_hash_entry *h) | |
5638 | { | |
5639 | return !(h->forced_local | |
5640 | || h->root.type == bfd_link_hash_undefined | |
5641 | || h->root.type == bfd_link_hash_undefweak | |
5642 | || ((h->root.type == bfd_link_hash_defined | |
5643 | || h->root.type == bfd_link_hash_defweak) | |
5644 | && h->root.u.def.section->output_section == NULL)); | |
5645 | } | |
5646 | ||
5a580b3a AM |
5647 | /* Array used to determine the number of hash table buckets to use |
5648 | based on the number of symbols there are. If there are fewer than | |
5649 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
5650 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
5651 | than 32771 buckets. */ | |
5652 | ||
5653 | static const size_t elf_buckets[] = | |
5654 | { | |
5655 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
5656 | 16411, 32771, 0 | |
5657 | }; | |
5658 | ||
5659 | /* Compute bucket count for hashing table. We do not use a static set | |
5660 | of possible tables sizes anymore. Instead we determine for all | |
5661 | possible reasonable sizes of the table the outcome (i.e., the | |
5662 | number of collisions etc) and choose the best solution. The | |
5663 | weighting functions are not too simple to allow the table to grow | |
5664 | without bounds. Instead one of the weighting factors is the size. | |
5665 | Therefore the result is always a good payoff between few collisions | |
5666 | (= short chain lengths) and table size. */ | |
5667 | static size_t | |
b20dd2ce | 5668 | compute_bucket_count (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
d40f3da9 AM |
5669 | unsigned long int *hashcodes ATTRIBUTE_UNUSED, |
5670 | unsigned long int nsyms, | |
5671 | int gnu_hash) | |
5a580b3a | 5672 | { |
5a580b3a | 5673 | size_t best_size = 0; |
5a580b3a | 5674 | unsigned long int i; |
5a580b3a | 5675 | |
5a580b3a AM |
5676 | /* We have a problem here. The following code to optimize the table |
5677 | size requires an integer type with more the 32 bits. If | |
5678 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
5679 | #ifdef BFD_HOST_U_64_BIT | |
5680 | if (info->optimize) | |
5681 | { | |
5a580b3a AM |
5682 | size_t minsize; |
5683 | size_t maxsize; | |
5684 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
5a580b3a | 5685 | bfd *dynobj = elf_hash_table (info)->dynobj; |
d40f3da9 | 5686 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; |
5a580b3a | 5687 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); |
fdc90cb4 | 5688 | unsigned long int *counts; |
d40f3da9 | 5689 | bfd_size_type amt; |
0883b6e0 | 5690 | unsigned int no_improvement_count = 0; |
5a580b3a AM |
5691 | |
5692 | /* Possible optimization parameters: if we have NSYMS symbols we say | |
5693 | that the hashing table must at least have NSYMS/4 and at most | |
5694 | 2*NSYMS buckets. */ | |
5695 | minsize = nsyms / 4; | |
5696 | if (minsize == 0) | |
5697 | minsize = 1; | |
5698 | best_size = maxsize = nsyms * 2; | |
fdc90cb4 JJ |
5699 | if (gnu_hash) |
5700 | { | |
5701 | if (minsize < 2) | |
5702 | minsize = 2; | |
5703 | if ((best_size & 31) == 0) | |
5704 | ++best_size; | |
5705 | } | |
5a580b3a AM |
5706 | |
5707 | /* Create array where we count the collisions in. We must use bfd_malloc | |
5708 | since the size could be large. */ | |
5709 | amt = maxsize; | |
5710 | amt *= sizeof (unsigned long int); | |
a50b1753 | 5711 | counts = (unsigned long int *) bfd_malloc (amt); |
5a580b3a | 5712 | if (counts == NULL) |
fdc90cb4 | 5713 | return 0; |
5a580b3a AM |
5714 | |
5715 | /* Compute the "optimal" size for the hash table. The criteria is a | |
5716 | minimal chain length. The minor criteria is (of course) the size | |
5717 | of the table. */ | |
5718 | for (i = minsize; i < maxsize; ++i) | |
5719 | { | |
5720 | /* Walk through the array of hashcodes and count the collisions. */ | |
5721 | BFD_HOST_U_64_BIT max; | |
5722 | unsigned long int j; | |
5723 | unsigned long int fact; | |
5724 | ||
fdc90cb4 JJ |
5725 | if (gnu_hash && (i & 31) == 0) |
5726 | continue; | |
5727 | ||
5a580b3a AM |
5728 | memset (counts, '\0', i * sizeof (unsigned long int)); |
5729 | ||
5730 | /* Determine how often each hash bucket is used. */ | |
5731 | for (j = 0; j < nsyms; ++j) | |
5732 | ++counts[hashcodes[j] % i]; | |
5733 | ||
5734 | /* For the weight function we need some information about the | |
5735 | pagesize on the target. This is information need not be 100% | |
5736 | accurate. Since this information is not available (so far) we | |
5737 | define it here to a reasonable default value. If it is crucial | |
5738 | to have a better value some day simply define this value. */ | |
5739 | # ifndef BFD_TARGET_PAGESIZE | |
5740 | # define BFD_TARGET_PAGESIZE (4096) | |
5741 | # endif | |
5742 | ||
fdc90cb4 JJ |
5743 | /* We in any case need 2 + DYNSYMCOUNT entries for the size values |
5744 | and the chains. */ | |
5745 | max = (2 + dynsymcount) * bed->s->sizeof_hash_entry; | |
5a580b3a AM |
5746 | |
5747 | # if 1 | |
5748 | /* Variant 1: optimize for short chains. We add the squares | |
5749 | of all the chain lengths (which favors many small chain | |
5750 | over a few long chains). */ | |
5751 | for (j = 0; j < i; ++j) | |
5752 | max += counts[j] * counts[j]; | |
5753 | ||
5754 | /* This adds penalties for the overall size of the table. */ | |
fdc90cb4 | 5755 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
5756 | max *= fact * fact; |
5757 | # else | |
5758 | /* Variant 2: Optimize a lot more for small table. Here we | |
5759 | also add squares of the size but we also add penalties for | |
5760 | empty slots (the +1 term). */ | |
5761 | for (j = 0; j < i; ++j) | |
5762 | max += (1 + counts[j]) * (1 + counts[j]); | |
5763 | ||
5764 | /* The overall size of the table is considered, but not as | |
5765 | strong as in variant 1, where it is squared. */ | |
fdc90cb4 | 5766 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
5767 | max *= fact; |
5768 | # endif | |
5769 | ||
5770 | /* Compare with current best results. */ | |
5771 | if (max < best_chlen) | |
5772 | { | |
5773 | best_chlen = max; | |
5774 | best_size = i; | |
ca4be51c | 5775 | no_improvement_count = 0; |
5a580b3a | 5776 | } |
0883b6e0 NC |
5777 | /* PR 11843: Avoid futile long searches for the best bucket size |
5778 | when there are a large number of symbols. */ | |
5779 | else if (++no_improvement_count == 100) | |
5780 | break; | |
5a580b3a AM |
5781 | } |
5782 | ||
5783 | free (counts); | |
5784 | } | |
5785 | else | |
5786 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
5787 | { | |
5788 | /* This is the fallback solution if no 64bit type is available or if we | |
5789 | are not supposed to spend much time on optimizations. We select the | |
5790 | bucket count using a fixed set of numbers. */ | |
5791 | for (i = 0; elf_buckets[i] != 0; i++) | |
5792 | { | |
5793 | best_size = elf_buckets[i]; | |
fdc90cb4 | 5794 | if (nsyms < elf_buckets[i + 1]) |
5a580b3a AM |
5795 | break; |
5796 | } | |
fdc90cb4 JJ |
5797 | if (gnu_hash && best_size < 2) |
5798 | best_size = 2; | |
5a580b3a AM |
5799 | } |
5800 | ||
5a580b3a AM |
5801 | return best_size; |
5802 | } | |
5803 | ||
d0bf826b AM |
5804 | /* Size any SHT_GROUP section for ld -r. */ |
5805 | ||
5806 | bfd_boolean | |
5807 | _bfd_elf_size_group_sections (struct bfd_link_info *info) | |
5808 | { | |
5809 | bfd *ibfd; | |
5810 | ||
c72f2fb2 | 5811 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
d0bf826b AM |
5812 | if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour |
5813 | && !_bfd_elf_fixup_group_sections (ibfd, bfd_abs_section_ptr)) | |
5814 | return FALSE; | |
5815 | return TRUE; | |
5816 | } | |
5817 | ||
04c3a755 NS |
5818 | /* Set a default stack segment size. The value in INFO wins. If it |
5819 | is unset, LEGACY_SYMBOL's value is used, and if that symbol is | |
5820 | undefined it is initialized. */ | |
5821 | ||
5822 | bfd_boolean | |
5823 | bfd_elf_stack_segment_size (bfd *output_bfd, | |
5824 | struct bfd_link_info *info, | |
5825 | const char *legacy_symbol, | |
5826 | bfd_vma default_size) | |
5827 | { | |
5828 | struct elf_link_hash_entry *h = NULL; | |
5829 | ||
5830 | /* Look for legacy symbol. */ | |
5831 | if (legacy_symbol) | |
5832 | h = elf_link_hash_lookup (elf_hash_table (info), legacy_symbol, | |
5833 | FALSE, FALSE, FALSE); | |
5834 | if (h && (h->root.type == bfd_link_hash_defined | |
5835 | || h->root.type == bfd_link_hash_defweak) | |
5836 | && h->def_regular | |
5837 | && (h->type == STT_NOTYPE || h->type == STT_OBJECT)) | |
5838 | { | |
5839 | /* The symbol has no type if specified on the command line. */ | |
5840 | h->type = STT_OBJECT; | |
5841 | if (info->stacksize) | |
695344c0 | 5842 | /* xgettext:c-format */ |
4eca0228 AM |
5843 | _bfd_error_handler (_("%B: stack size specified and %s set"), |
5844 | output_bfd, legacy_symbol); | |
04c3a755 | 5845 | else if (h->root.u.def.section != bfd_abs_section_ptr) |
695344c0 | 5846 | /* xgettext:c-format */ |
4eca0228 AM |
5847 | _bfd_error_handler (_("%B: %s not absolute"), |
5848 | output_bfd, legacy_symbol); | |
04c3a755 NS |
5849 | else |
5850 | info->stacksize = h->root.u.def.value; | |
5851 | } | |
5852 | ||
5853 | if (!info->stacksize) | |
5854 | /* If the user didn't set a size, or explicitly inhibit the | |
5855 | size, set it now. */ | |
5856 | info->stacksize = default_size; | |
5857 | ||
5858 | /* Provide the legacy symbol, if it is referenced. */ | |
5859 | if (h && (h->root.type == bfd_link_hash_undefined | |
5860 | || h->root.type == bfd_link_hash_undefweak)) | |
5861 | { | |
5862 | struct bfd_link_hash_entry *bh = NULL; | |
5863 | ||
5864 | if (!(_bfd_generic_link_add_one_symbol | |
5865 | (info, output_bfd, legacy_symbol, | |
5866 | BSF_GLOBAL, bfd_abs_section_ptr, | |
5867 | info->stacksize >= 0 ? info->stacksize : 0, | |
5868 | NULL, FALSE, get_elf_backend_data (output_bfd)->collect, &bh))) | |
5869 | return FALSE; | |
5870 | ||
5871 | h = (struct elf_link_hash_entry *) bh; | |
5872 | h->def_regular = 1; | |
5873 | h->type = STT_OBJECT; | |
5874 | } | |
5875 | ||
5876 | return TRUE; | |
5877 | } | |
5878 | ||
5a580b3a AM |
5879 | /* Set up the sizes and contents of the ELF dynamic sections. This is |
5880 | called by the ELF linker emulation before_allocation routine. We | |
5881 | must set the sizes of the sections before the linker sets the | |
5882 | addresses of the various sections. */ | |
5883 | ||
5884 | bfd_boolean | |
5885 | bfd_elf_size_dynamic_sections (bfd *output_bfd, | |
5886 | const char *soname, | |
5887 | const char *rpath, | |
5888 | const char *filter_shlib, | |
7ee314fa AM |
5889 | const char *audit, |
5890 | const char *depaudit, | |
5a580b3a AM |
5891 | const char * const *auxiliary_filters, |
5892 | struct bfd_link_info *info, | |
fd91d419 | 5893 | asection **sinterpptr) |
5a580b3a | 5894 | { |
ef53be89 | 5895 | size_t soname_indx; |
5a580b3a AM |
5896 | bfd *dynobj; |
5897 | const struct elf_backend_data *bed; | |
28caa186 | 5898 | struct elf_info_failed asvinfo; |
5a580b3a AM |
5899 | |
5900 | *sinterpptr = NULL; | |
5901 | ||
ef53be89 | 5902 | soname_indx = (size_t) -1; |
5a580b3a AM |
5903 | |
5904 | if (!is_elf_hash_table (info->hash)) | |
5905 | return TRUE; | |
5906 | ||
6bfdb61b | 5907 | bed = get_elf_backend_data (output_bfd); |
04c3a755 NS |
5908 | |
5909 | /* Any syms created from now on start with -1 in | |
5910 | got.refcount/offset and plt.refcount/offset. */ | |
5911 | elf_hash_table (info)->init_got_refcount | |
5912 | = elf_hash_table (info)->init_got_offset; | |
5913 | elf_hash_table (info)->init_plt_refcount | |
5914 | = elf_hash_table (info)->init_plt_offset; | |
5915 | ||
0e1862bb | 5916 | if (bfd_link_relocatable (info) |
04c3a755 NS |
5917 | && !_bfd_elf_size_group_sections (info)) |
5918 | return FALSE; | |
5919 | ||
5920 | /* The backend may have to create some sections regardless of whether | |
5921 | we're dynamic or not. */ | |
5922 | if (bed->elf_backend_always_size_sections | |
5923 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
5924 | return FALSE; | |
5925 | ||
5926 | /* Determine any GNU_STACK segment requirements, after the backend | |
5927 | has had a chance to set a default segment size. */ | |
5a580b3a | 5928 | if (info->execstack) |
12bd6957 | 5929 | elf_stack_flags (output_bfd) = PF_R | PF_W | PF_X; |
5a580b3a | 5930 | else if (info->noexecstack) |
12bd6957 | 5931 | elf_stack_flags (output_bfd) = PF_R | PF_W; |
5a580b3a AM |
5932 | else |
5933 | { | |
5934 | bfd *inputobj; | |
5935 | asection *notesec = NULL; | |
5936 | int exec = 0; | |
5937 | ||
5938 | for (inputobj = info->input_bfds; | |
5939 | inputobj; | |
c72f2fb2 | 5940 | inputobj = inputobj->link.next) |
5a580b3a AM |
5941 | { |
5942 | asection *s; | |
5943 | ||
a92c088a L |
5944 | if (inputobj->flags |
5945 | & (DYNAMIC | EXEC_P | BFD_PLUGIN | BFD_LINKER_CREATED)) | |
5a580b3a AM |
5946 | continue; |
5947 | s = bfd_get_section_by_name (inputobj, ".note.GNU-stack"); | |
5948 | if (s) | |
5949 | { | |
5950 | if (s->flags & SEC_CODE) | |
5951 | exec = PF_X; | |
5952 | notesec = s; | |
5953 | } | |
6bfdb61b | 5954 | else if (bed->default_execstack) |
5a580b3a AM |
5955 | exec = PF_X; |
5956 | } | |
04c3a755 | 5957 | if (notesec || info->stacksize > 0) |
12bd6957 | 5958 | elf_stack_flags (output_bfd) = PF_R | PF_W | exec; |
0e1862bb | 5959 | if (notesec && exec && bfd_link_relocatable (info) |
04c3a755 NS |
5960 | && notesec->output_section != bfd_abs_section_ptr) |
5961 | notesec->output_section->flags |= SEC_CODE; | |
5a580b3a AM |
5962 | } |
5963 | ||
5a580b3a AM |
5964 | dynobj = elf_hash_table (info)->dynobj; |
5965 | ||
9a2a56cc | 5966 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) |
5a580b3a AM |
5967 | { |
5968 | struct elf_info_failed eif; | |
5969 | struct elf_link_hash_entry *h; | |
5970 | asection *dynstr; | |
5971 | struct bfd_elf_version_tree *t; | |
5972 | struct bfd_elf_version_expr *d; | |
046183de | 5973 | asection *s; |
5a580b3a AM |
5974 | bfd_boolean all_defined; |
5975 | ||
3d4d4302 | 5976 | *sinterpptr = bfd_get_linker_section (dynobj, ".interp"); |
9b8b325a | 5977 | BFD_ASSERT (*sinterpptr != NULL || !bfd_link_executable (info) || info->nointerp); |
5a580b3a AM |
5978 | |
5979 | if (soname != NULL) | |
5980 | { | |
5981 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5982 | soname, TRUE); | |
ef53be89 | 5983 | if (soname_indx == (size_t) -1 |
5a580b3a AM |
5984 | || !_bfd_elf_add_dynamic_entry (info, DT_SONAME, soname_indx)) |
5985 | return FALSE; | |
5986 | } | |
5987 | ||
5988 | if (info->symbolic) | |
5989 | { | |
5990 | if (!_bfd_elf_add_dynamic_entry (info, DT_SYMBOLIC, 0)) | |
5991 | return FALSE; | |
5992 | info->flags |= DF_SYMBOLIC; | |
5993 | } | |
5994 | ||
5995 | if (rpath != NULL) | |
5996 | { | |
ef53be89 | 5997 | size_t indx; |
b1b00fcc | 5998 | bfd_vma tag; |
5a580b3a AM |
5999 | |
6000 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, | |
6001 | TRUE); | |
ef53be89 | 6002 | if (indx == (size_t) -1) |
5a580b3a AM |
6003 | return FALSE; |
6004 | ||
b1b00fcc MF |
6005 | tag = info->new_dtags ? DT_RUNPATH : DT_RPATH; |
6006 | if (!_bfd_elf_add_dynamic_entry (info, tag, indx)) | |
6007 | return FALSE; | |
5a580b3a AM |
6008 | } |
6009 | ||
6010 | if (filter_shlib != NULL) | |
6011 | { | |
ef53be89 | 6012 | size_t indx; |
5a580b3a AM |
6013 | |
6014 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6015 | filter_shlib, TRUE); | |
ef53be89 | 6016 | if (indx == (size_t) -1 |
5a580b3a AM |
6017 | || !_bfd_elf_add_dynamic_entry (info, DT_FILTER, indx)) |
6018 | return FALSE; | |
6019 | } | |
6020 | ||
6021 | if (auxiliary_filters != NULL) | |
6022 | { | |
6023 | const char * const *p; | |
6024 | ||
6025 | for (p = auxiliary_filters; *p != NULL; p++) | |
6026 | { | |
ef53be89 | 6027 | size_t indx; |
5a580b3a AM |
6028 | |
6029 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6030 | *p, TRUE); | |
ef53be89 | 6031 | if (indx == (size_t) -1 |
5a580b3a AM |
6032 | || !_bfd_elf_add_dynamic_entry (info, DT_AUXILIARY, indx)) |
6033 | return FALSE; | |
6034 | } | |
6035 | } | |
6036 | ||
7ee314fa AM |
6037 | if (audit != NULL) |
6038 | { | |
ef53be89 | 6039 | size_t indx; |
7ee314fa AM |
6040 | |
6041 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, audit, | |
6042 | TRUE); | |
ef53be89 | 6043 | if (indx == (size_t) -1 |
7ee314fa AM |
6044 | || !_bfd_elf_add_dynamic_entry (info, DT_AUDIT, indx)) |
6045 | return FALSE; | |
6046 | } | |
6047 | ||
6048 | if (depaudit != NULL) | |
6049 | { | |
ef53be89 | 6050 | size_t indx; |
7ee314fa AM |
6051 | |
6052 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, depaudit, | |
6053 | TRUE); | |
ef53be89 | 6054 | if (indx == (size_t) -1 |
7ee314fa AM |
6055 | || !_bfd_elf_add_dynamic_entry (info, DT_DEPAUDIT, indx)) |
6056 | return FALSE; | |
6057 | } | |
6058 | ||
5a580b3a | 6059 | eif.info = info; |
5a580b3a AM |
6060 | eif.failed = FALSE; |
6061 | ||
6062 | /* If we are supposed to export all symbols into the dynamic symbol | |
6063 | table (this is not the normal case), then do so. */ | |
55255dae | 6064 | if (info->export_dynamic |
0e1862bb | 6065 | || (bfd_link_executable (info) && info->dynamic)) |
5a580b3a AM |
6066 | { |
6067 | elf_link_hash_traverse (elf_hash_table (info), | |
6068 | _bfd_elf_export_symbol, | |
6069 | &eif); | |
6070 | if (eif.failed) | |
6071 | return FALSE; | |
6072 | } | |
6073 | ||
6074 | /* Make all global versions with definition. */ | |
fd91d419 | 6075 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 6076 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 6077 | if (!d->symver && d->literal) |
5a580b3a AM |
6078 | { |
6079 | const char *verstr, *name; | |
6080 | size_t namelen, verlen, newlen; | |
93252b1c | 6081 | char *newname, *p, leading_char; |
5a580b3a AM |
6082 | struct elf_link_hash_entry *newh; |
6083 | ||
93252b1c | 6084 | leading_char = bfd_get_symbol_leading_char (output_bfd); |
ae5a3597 | 6085 | name = d->pattern; |
93252b1c | 6086 | namelen = strlen (name) + (leading_char != '\0'); |
5a580b3a AM |
6087 | verstr = t->name; |
6088 | verlen = strlen (verstr); | |
6089 | newlen = namelen + verlen + 3; | |
6090 | ||
a50b1753 | 6091 | newname = (char *) bfd_malloc (newlen); |
5a580b3a AM |
6092 | if (newname == NULL) |
6093 | return FALSE; | |
93252b1c MF |
6094 | newname[0] = leading_char; |
6095 | memcpy (newname + (leading_char != '\0'), name, namelen); | |
5a580b3a AM |
6096 | |
6097 | /* Check the hidden versioned definition. */ | |
6098 | p = newname + namelen; | |
6099 | *p++ = ELF_VER_CHR; | |
6100 | memcpy (p, verstr, verlen + 1); | |
6101 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
6102 | newname, FALSE, FALSE, | |
6103 | FALSE); | |
6104 | if (newh == NULL | |
6105 | || (newh->root.type != bfd_link_hash_defined | |
6106 | && newh->root.type != bfd_link_hash_defweak)) | |
6107 | { | |
6108 | /* Check the default versioned definition. */ | |
6109 | *p++ = ELF_VER_CHR; | |
6110 | memcpy (p, verstr, verlen + 1); | |
6111 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
6112 | newname, FALSE, FALSE, | |
6113 | FALSE); | |
6114 | } | |
6115 | free (newname); | |
6116 | ||
6117 | /* Mark this version if there is a definition and it is | |
6118 | not defined in a shared object. */ | |
6119 | if (newh != NULL | |
f5385ebf | 6120 | && !newh->def_dynamic |
5a580b3a AM |
6121 | && (newh->root.type == bfd_link_hash_defined |
6122 | || newh->root.type == bfd_link_hash_defweak)) | |
6123 | d->symver = 1; | |
6124 | } | |
6125 | ||
6126 | /* Attach all the symbols to their version information. */ | |
5a580b3a | 6127 | asvinfo.info = info; |
5a580b3a AM |
6128 | asvinfo.failed = FALSE; |
6129 | ||
6130 | elf_link_hash_traverse (elf_hash_table (info), | |
6131 | _bfd_elf_link_assign_sym_version, | |
6132 | &asvinfo); | |
6133 | if (asvinfo.failed) | |
6134 | return FALSE; | |
6135 | ||
6136 | if (!info->allow_undefined_version) | |
6137 | { | |
6138 | /* Check if all global versions have a definition. */ | |
6139 | all_defined = TRUE; | |
fd91d419 | 6140 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 6141 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 6142 | if (d->literal && !d->symver && !d->script) |
5a580b3a | 6143 | { |
4eca0228 | 6144 | _bfd_error_handler |
5a580b3a AM |
6145 | (_("%s: undefined version: %s"), |
6146 | d->pattern, t->name); | |
6147 | all_defined = FALSE; | |
6148 | } | |
6149 | ||
6150 | if (!all_defined) | |
6151 | { | |
6152 | bfd_set_error (bfd_error_bad_value); | |
6153 | return FALSE; | |
6154 | } | |
6155 | } | |
6156 | ||
6157 | /* Find all symbols which were defined in a dynamic object and make | |
6158 | the backend pick a reasonable value for them. */ | |
6159 | elf_link_hash_traverse (elf_hash_table (info), | |
6160 | _bfd_elf_adjust_dynamic_symbol, | |
6161 | &eif); | |
6162 | if (eif.failed) | |
6163 | return FALSE; | |
6164 | ||
6165 | /* Add some entries to the .dynamic section. We fill in some of the | |
ee75fd95 | 6166 | values later, in bfd_elf_final_link, but we must add the entries |
5a580b3a AM |
6167 | now so that we know the final size of the .dynamic section. */ |
6168 | ||
6169 | /* If there are initialization and/or finalization functions to | |
6170 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
6171 | h = (info->init_function | |
6172 | ? elf_link_hash_lookup (elf_hash_table (info), | |
6173 | info->init_function, FALSE, | |
6174 | FALSE, FALSE) | |
6175 | : NULL); | |
6176 | if (h != NULL | |
f5385ebf AM |
6177 | && (h->ref_regular |
6178 | || h->def_regular)) | |
5a580b3a AM |
6179 | { |
6180 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT, 0)) | |
6181 | return FALSE; | |
6182 | } | |
6183 | h = (info->fini_function | |
6184 | ? elf_link_hash_lookup (elf_hash_table (info), | |
6185 | info->fini_function, FALSE, | |
6186 | FALSE, FALSE) | |
6187 | : NULL); | |
6188 | if (h != NULL | |
f5385ebf AM |
6189 | && (h->ref_regular |
6190 | || h->def_regular)) | |
5a580b3a AM |
6191 | { |
6192 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI, 0)) | |
6193 | return FALSE; | |
6194 | } | |
6195 | ||
046183de AM |
6196 | s = bfd_get_section_by_name (output_bfd, ".preinit_array"); |
6197 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
6198 | { |
6199 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
0e1862bb | 6200 | if (! bfd_link_executable (info)) |
5a580b3a AM |
6201 | { |
6202 | bfd *sub; | |
6203 | asection *o; | |
6204 | ||
6205 | for (sub = info->input_bfds; sub != NULL; | |
c72f2fb2 | 6206 | sub = sub->link.next) |
3fcd97f1 JJ |
6207 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour) |
6208 | for (o = sub->sections; o != NULL; o = o->next) | |
6209 | if (elf_section_data (o)->this_hdr.sh_type | |
6210 | == SHT_PREINIT_ARRAY) | |
6211 | { | |
4eca0228 | 6212 | _bfd_error_handler |
3fcd97f1 JJ |
6213 | (_("%B: .preinit_array section is not allowed in DSO"), |
6214 | sub); | |
6215 | break; | |
6216 | } | |
5a580b3a AM |
6217 | |
6218 | bfd_set_error (bfd_error_nonrepresentable_section); | |
6219 | return FALSE; | |
6220 | } | |
6221 | ||
6222 | if (!_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAY, 0) | |
6223 | || !_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAYSZ, 0)) | |
6224 | return FALSE; | |
6225 | } | |
046183de AM |
6226 | s = bfd_get_section_by_name (output_bfd, ".init_array"); |
6227 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
6228 | { |
6229 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAY, 0) | |
6230 | || !_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAYSZ, 0)) | |
6231 | return FALSE; | |
6232 | } | |
046183de AM |
6233 | s = bfd_get_section_by_name (output_bfd, ".fini_array"); |
6234 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
6235 | { |
6236 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAY, 0) | |
6237 | || !_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAYSZ, 0)) | |
6238 | return FALSE; | |
6239 | } | |
6240 | ||
3d4d4302 | 6241 | dynstr = bfd_get_linker_section (dynobj, ".dynstr"); |
5a580b3a AM |
6242 | /* If .dynstr is excluded from the link, we don't want any of |
6243 | these tags. Strictly, we should be checking each section | |
6244 | individually; This quick check covers for the case where | |
6245 | someone does a /DISCARD/ : { *(*) }. */ | |
6246 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
6247 | { | |
6248 | bfd_size_type strsize; | |
6249 | ||
6250 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
fdc90cb4 JJ |
6251 | if ((info->emit_hash |
6252 | && !_bfd_elf_add_dynamic_entry (info, DT_HASH, 0)) | |
6253 | || (info->emit_gnu_hash | |
6254 | && !_bfd_elf_add_dynamic_entry (info, DT_GNU_HASH, 0)) | |
5a580b3a AM |
6255 | || !_bfd_elf_add_dynamic_entry (info, DT_STRTAB, 0) |
6256 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
6257 | || !_bfd_elf_add_dynamic_entry (info, DT_STRSZ, strsize) | |
6258 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMENT, | |
6259 | bed->s->sizeof_sym)) | |
6260 | return FALSE; | |
6261 | } | |
6262 | } | |
6263 | ||
de231f20 CM |
6264 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) |
6265 | return FALSE; | |
6266 | ||
5a580b3a AM |
6267 | /* The backend must work out the sizes of all the other dynamic |
6268 | sections. */ | |
9a2a56cc AM |
6269 | if (dynobj != NULL |
6270 | && bed->elf_backend_size_dynamic_sections != NULL | |
5a580b3a AM |
6271 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) |
6272 | return FALSE; | |
6273 | ||
9a2a56cc | 6274 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) |
5a580b3a | 6275 | { |
554220db | 6276 | unsigned long section_sym_count; |
fd91d419 | 6277 | struct bfd_elf_version_tree *verdefs; |
5a580b3a | 6278 | asection *s; |
5a580b3a AM |
6279 | |
6280 | /* Set up the version definition section. */ | |
3d4d4302 | 6281 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); |
5a580b3a AM |
6282 | BFD_ASSERT (s != NULL); |
6283 | ||
6284 | /* We may have created additional version definitions if we are | |
6285 | just linking a regular application. */ | |
fd91d419 | 6286 | verdefs = info->version_info; |
5a580b3a AM |
6287 | |
6288 | /* Skip anonymous version tag. */ | |
6289 | if (verdefs != NULL && verdefs->vernum == 0) | |
6290 | verdefs = verdefs->next; | |
6291 | ||
3e3b46e5 | 6292 | if (verdefs == NULL && !info->create_default_symver) |
8423293d | 6293 | s->flags |= SEC_EXCLUDE; |
5a580b3a AM |
6294 | else |
6295 | { | |
6296 | unsigned int cdefs; | |
6297 | bfd_size_type size; | |
6298 | struct bfd_elf_version_tree *t; | |
6299 | bfd_byte *p; | |
6300 | Elf_Internal_Verdef def; | |
6301 | Elf_Internal_Verdaux defaux; | |
3e3b46e5 PB |
6302 | struct bfd_link_hash_entry *bh; |
6303 | struct elf_link_hash_entry *h; | |
6304 | const char *name; | |
5a580b3a AM |
6305 | |
6306 | cdefs = 0; | |
6307 | size = 0; | |
6308 | ||
6309 | /* Make space for the base version. */ | |
6310 | size += sizeof (Elf_External_Verdef); | |
6311 | size += sizeof (Elf_External_Verdaux); | |
6312 | ++cdefs; | |
6313 | ||
3e3b46e5 PB |
6314 | /* Make space for the default version. */ |
6315 | if (info->create_default_symver) | |
6316 | { | |
6317 | size += sizeof (Elf_External_Verdef); | |
6318 | ++cdefs; | |
6319 | } | |
6320 | ||
5a580b3a AM |
6321 | for (t = verdefs; t != NULL; t = t->next) |
6322 | { | |
6323 | struct bfd_elf_version_deps *n; | |
6324 | ||
a6cc6b3b RO |
6325 | /* Don't emit base version twice. */ |
6326 | if (t->vernum == 0) | |
6327 | continue; | |
6328 | ||
5a580b3a AM |
6329 | size += sizeof (Elf_External_Verdef); |
6330 | size += sizeof (Elf_External_Verdaux); | |
6331 | ++cdefs; | |
6332 | ||
6333 | for (n = t->deps; n != NULL; n = n->next) | |
6334 | size += sizeof (Elf_External_Verdaux); | |
6335 | } | |
6336 | ||
eea6121a | 6337 | s->size = size; |
a50b1753 | 6338 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
eea6121a | 6339 | if (s->contents == NULL && s->size != 0) |
5a580b3a AM |
6340 | return FALSE; |
6341 | ||
6342 | /* Fill in the version definition section. */ | |
6343 | ||
6344 | p = s->contents; | |
6345 | ||
6346 | def.vd_version = VER_DEF_CURRENT; | |
6347 | def.vd_flags = VER_FLG_BASE; | |
6348 | def.vd_ndx = 1; | |
6349 | def.vd_cnt = 1; | |
3e3b46e5 PB |
6350 | if (info->create_default_symver) |
6351 | { | |
6352 | def.vd_aux = 2 * sizeof (Elf_External_Verdef); | |
6353 | def.vd_next = sizeof (Elf_External_Verdef); | |
6354 | } | |
6355 | else | |
6356 | { | |
6357 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6358 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6359 | + sizeof (Elf_External_Verdaux)); | |
6360 | } | |
5a580b3a | 6361 | |
ef53be89 | 6362 | if (soname_indx != (size_t) -1) |
5a580b3a AM |
6363 | { |
6364 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6365 | soname_indx); | |
6366 | def.vd_hash = bfd_elf_hash (soname); | |
6367 | defaux.vda_name = soname_indx; | |
3e3b46e5 | 6368 | name = soname; |
5a580b3a AM |
6369 | } |
6370 | else | |
6371 | { | |
ef53be89 | 6372 | size_t indx; |
5a580b3a | 6373 | |
06084812 | 6374 | name = lbasename (output_bfd->filename); |
5a580b3a AM |
6375 | def.vd_hash = bfd_elf_hash (name); |
6376 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6377 | name, FALSE); | |
ef53be89 | 6378 | if (indx == (size_t) -1) |
5a580b3a AM |
6379 | return FALSE; |
6380 | defaux.vda_name = indx; | |
6381 | } | |
6382 | defaux.vda_next = 0; | |
6383 | ||
6384 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6385 | (Elf_External_Verdef *) p); | |
6386 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
6387 | if (info->create_default_symver) |
6388 | { | |
6389 | /* Add a symbol representing this version. */ | |
6390 | bh = NULL; | |
6391 | if (! (_bfd_generic_link_add_one_symbol | |
6392 | (info, dynobj, name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6393 | 0, NULL, FALSE, | |
6394 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6395 | return FALSE; | |
6396 | h = (struct elf_link_hash_entry *) bh; | |
6397 | h->non_elf = 0; | |
6398 | h->def_regular = 1; | |
6399 | h->type = STT_OBJECT; | |
6400 | h->verinfo.vertree = NULL; | |
6401 | ||
6402 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
6403 | return FALSE; | |
6404 | ||
6405 | /* Create a duplicate of the base version with the same | |
6406 | aux block, but different flags. */ | |
6407 | def.vd_flags = 0; | |
6408 | def.vd_ndx = 2; | |
6409 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6410 | if (verdefs) | |
6411 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6412 | + sizeof (Elf_External_Verdaux)); | |
6413 | else | |
6414 | def.vd_next = 0; | |
6415 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6416 | (Elf_External_Verdef *) p); | |
6417 | p += sizeof (Elf_External_Verdef); | |
6418 | } | |
5a580b3a AM |
6419 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, |
6420 | (Elf_External_Verdaux *) p); | |
6421 | p += sizeof (Elf_External_Verdaux); | |
6422 | ||
6423 | for (t = verdefs; t != NULL; t = t->next) | |
6424 | { | |
6425 | unsigned int cdeps; | |
6426 | struct bfd_elf_version_deps *n; | |
5a580b3a | 6427 | |
a6cc6b3b RO |
6428 | /* Don't emit the base version twice. */ |
6429 | if (t->vernum == 0) | |
6430 | continue; | |
6431 | ||
5a580b3a AM |
6432 | cdeps = 0; |
6433 | for (n = t->deps; n != NULL; n = n->next) | |
6434 | ++cdeps; | |
6435 | ||
6436 | /* Add a symbol representing this version. */ | |
6437 | bh = NULL; | |
6438 | if (! (_bfd_generic_link_add_one_symbol | |
6439 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6440 | 0, NULL, FALSE, | |
6441 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6442 | return FALSE; | |
6443 | h = (struct elf_link_hash_entry *) bh; | |
f5385ebf AM |
6444 | h->non_elf = 0; |
6445 | h->def_regular = 1; | |
5a580b3a AM |
6446 | h->type = STT_OBJECT; |
6447 | h->verinfo.vertree = t; | |
6448 | ||
c152c796 | 6449 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
5a580b3a AM |
6450 | return FALSE; |
6451 | ||
6452 | def.vd_version = VER_DEF_CURRENT; | |
6453 | def.vd_flags = 0; | |
6454 | if (t->globals.list == NULL | |
6455 | && t->locals.list == NULL | |
6456 | && ! t->used) | |
6457 | def.vd_flags |= VER_FLG_WEAK; | |
3e3b46e5 | 6458 | def.vd_ndx = t->vernum + (info->create_default_symver ? 2 : 1); |
5a580b3a AM |
6459 | def.vd_cnt = cdeps + 1; |
6460 | def.vd_hash = bfd_elf_hash (t->name); | |
6461 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6462 | def.vd_next = 0; | |
a6cc6b3b RO |
6463 | |
6464 | /* If a basever node is next, it *must* be the last node in | |
6465 | the chain, otherwise Verdef construction breaks. */ | |
6466 | if (t->next != NULL && t->next->vernum == 0) | |
6467 | BFD_ASSERT (t->next->next == NULL); | |
6468 | ||
6469 | if (t->next != NULL && t->next->vernum != 0) | |
5a580b3a AM |
6470 | def.vd_next = (sizeof (Elf_External_Verdef) |
6471 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
6472 | ||
6473 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6474 | (Elf_External_Verdef *) p); | |
6475 | p += sizeof (Elf_External_Verdef); | |
6476 | ||
6477 | defaux.vda_name = h->dynstr_index; | |
6478 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6479 | h->dynstr_index); | |
6480 | defaux.vda_next = 0; | |
6481 | if (t->deps != NULL) | |
6482 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6483 | t->name_indx = defaux.vda_name; | |
6484 | ||
6485 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6486 | (Elf_External_Verdaux *) p); | |
6487 | p += sizeof (Elf_External_Verdaux); | |
6488 | ||
6489 | for (n = t->deps; n != NULL; n = n->next) | |
6490 | { | |
6491 | if (n->version_needed == NULL) | |
6492 | { | |
6493 | /* This can happen if there was an error in the | |
6494 | version script. */ | |
6495 | defaux.vda_name = 0; | |
6496 | } | |
6497 | else | |
6498 | { | |
6499 | defaux.vda_name = n->version_needed->name_indx; | |
6500 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6501 | defaux.vda_name); | |
6502 | } | |
6503 | if (n->next == NULL) | |
6504 | defaux.vda_next = 0; | |
6505 | else | |
6506 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6507 | ||
6508 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6509 | (Elf_External_Verdaux *) p); | |
6510 | p += sizeof (Elf_External_Verdaux); | |
6511 | } | |
6512 | } | |
6513 | ||
6514 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERDEF, 0) | |
6515 | || !_bfd_elf_add_dynamic_entry (info, DT_VERDEFNUM, cdefs)) | |
6516 | return FALSE; | |
6517 | ||
6518 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
6519 | } | |
6520 | ||
6521 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) | |
6522 | { | |
6523 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS, info->flags)) | |
6524 | return FALSE; | |
6525 | } | |
6526 | else if (info->flags & DF_BIND_NOW) | |
6527 | { | |
6528 | if (!_bfd_elf_add_dynamic_entry (info, DT_BIND_NOW, 0)) | |
6529 | return FALSE; | |
6530 | } | |
6531 | ||
6532 | if (info->flags_1) | |
6533 | { | |
0e1862bb | 6534 | if (bfd_link_executable (info)) |
5a580b3a AM |
6535 | info->flags_1 &= ~ (DF_1_INITFIRST |
6536 | | DF_1_NODELETE | |
6537 | | DF_1_NOOPEN); | |
6538 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS_1, info->flags_1)) | |
6539 | return FALSE; | |
6540 | } | |
6541 | ||
6542 | /* Work out the size of the version reference section. */ | |
6543 | ||
3d4d4302 | 6544 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); |
5a580b3a AM |
6545 | BFD_ASSERT (s != NULL); |
6546 | { | |
6547 | struct elf_find_verdep_info sinfo; | |
6548 | ||
5a580b3a AM |
6549 | sinfo.info = info; |
6550 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
6551 | if (sinfo.vers == 0) | |
6552 | sinfo.vers = 1; | |
6553 | sinfo.failed = FALSE; | |
6554 | ||
6555 | elf_link_hash_traverse (elf_hash_table (info), | |
6556 | _bfd_elf_link_find_version_dependencies, | |
6557 | &sinfo); | |
14b1c01e AM |
6558 | if (sinfo.failed) |
6559 | return FALSE; | |
5a580b3a AM |
6560 | |
6561 | if (elf_tdata (output_bfd)->verref == NULL) | |
8423293d | 6562 | s->flags |= SEC_EXCLUDE; |
5a580b3a AM |
6563 | else |
6564 | { | |
6565 | Elf_Internal_Verneed *t; | |
6566 | unsigned int size; | |
6567 | unsigned int crefs; | |
6568 | bfd_byte *p; | |
6569 | ||
a6cc6b3b | 6570 | /* Build the version dependency section. */ |
5a580b3a AM |
6571 | size = 0; |
6572 | crefs = 0; | |
6573 | for (t = elf_tdata (output_bfd)->verref; | |
6574 | t != NULL; | |
6575 | t = t->vn_nextref) | |
6576 | { | |
6577 | Elf_Internal_Vernaux *a; | |
6578 | ||
6579 | size += sizeof (Elf_External_Verneed); | |
6580 | ++crefs; | |
6581 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6582 | size += sizeof (Elf_External_Vernaux); | |
6583 | } | |
6584 | ||
eea6121a | 6585 | s->size = size; |
a50b1753 | 6586 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
5a580b3a AM |
6587 | if (s->contents == NULL) |
6588 | return FALSE; | |
6589 | ||
6590 | p = s->contents; | |
6591 | for (t = elf_tdata (output_bfd)->verref; | |
6592 | t != NULL; | |
6593 | t = t->vn_nextref) | |
6594 | { | |
6595 | unsigned int caux; | |
6596 | Elf_Internal_Vernaux *a; | |
ef53be89 | 6597 | size_t indx; |
5a580b3a AM |
6598 | |
6599 | caux = 0; | |
6600 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6601 | ++caux; | |
6602 | ||
6603 | t->vn_version = VER_NEED_CURRENT; | |
6604 | t->vn_cnt = caux; | |
6605 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6606 | elf_dt_name (t->vn_bfd) != NULL | |
6607 | ? elf_dt_name (t->vn_bfd) | |
06084812 | 6608 | : lbasename (t->vn_bfd->filename), |
5a580b3a | 6609 | FALSE); |
ef53be89 | 6610 | if (indx == (size_t) -1) |
5a580b3a AM |
6611 | return FALSE; |
6612 | t->vn_file = indx; | |
6613 | t->vn_aux = sizeof (Elf_External_Verneed); | |
6614 | if (t->vn_nextref == NULL) | |
6615 | t->vn_next = 0; | |
6616 | else | |
6617 | t->vn_next = (sizeof (Elf_External_Verneed) | |
6618 | + caux * sizeof (Elf_External_Vernaux)); | |
6619 | ||
6620 | _bfd_elf_swap_verneed_out (output_bfd, t, | |
6621 | (Elf_External_Verneed *) p); | |
6622 | p += sizeof (Elf_External_Verneed); | |
6623 | ||
6624 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6625 | { | |
6626 | a->vna_hash = bfd_elf_hash (a->vna_nodename); | |
6627 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6628 | a->vna_nodename, FALSE); | |
ef53be89 | 6629 | if (indx == (size_t) -1) |
5a580b3a AM |
6630 | return FALSE; |
6631 | a->vna_name = indx; | |
6632 | if (a->vna_nextptr == NULL) | |
6633 | a->vna_next = 0; | |
6634 | else | |
6635 | a->vna_next = sizeof (Elf_External_Vernaux); | |
6636 | ||
6637 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
6638 | (Elf_External_Vernaux *) p); | |
6639 | p += sizeof (Elf_External_Vernaux); | |
6640 | } | |
6641 | } | |
6642 | ||
6643 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERNEED, 0) | |
6644 | || !_bfd_elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs)) | |
6645 | return FALSE; | |
6646 | ||
6647 | elf_tdata (output_bfd)->cverrefs = crefs; | |
6648 | } | |
6649 | } | |
6650 | ||
8423293d AM |
6651 | if ((elf_tdata (output_bfd)->cverrefs == 0 |
6652 | && elf_tdata (output_bfd)->cverdefs == 0) | |
6653 | || _bfd_elf_link_renumber_dynsyms (output_bfd, info, | |
6654 | §ion_sym_count) == 0) | |
6655 | { | |
3d4d4302 | 6656 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
8423293d AM |
6657 | s->flags |= SEC_EXCLUDE; |
6658 | } | |
6659 | } | |
6660 | return TRUE; | |
6661 | } | |
6662 | ||
74541ad4 AM |
6663 | /* Find the first non-excluded output section. We'll use its |
6664 | section symbol for some emitted relocs. */ | |
6665 | void | |
6666 | _bfd_elf_init_1_index_section (bfd *output_bfd, struct bfd_link_info *info) | |
6667 | { | |
6668 | asection *s; | |
6669 | ||
6670 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
6671 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC | |
6672 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) | |
6673 | { | |
6674 | elf_hash_table (info)->text_index_section = s; | |
6675 | break; | |
6676 | } | |
6677 | } | |
6678 | ||
6679 | /* Find two non-excluded output sections, one for code, one for data. | |
6680 | We'll use their section symbols for some emitted relocs. */ | |
6681 | void | |
6682 | _bfd_elf_init_2_index_sections (bfd *output_bfd, struct bfd_link_info *info) | |
6683 | { | |
6684 | asection *s; | |
6685 | ||
266b05cf DJ |
6686 | /* Data first, since setting text_index_section changes |
6687 | _bfd_elf_link_omit_section_dynsym. */ | |
74541ad4 | 6688 | for (s = output_bfd->sections; s != NULL; s = s->next) |
266b05cf | 6689 | if (((s->flags & (SEC_EXCLUDE | SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC) |
74541ad4 AM |
6690 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) |
6691 | { | |
266b05cf | 6692 | elf_hash_table (info)->data_index_section = s; |
74541ad4 AM |
6693 | break; |
6694 | } | |
6695 | ||
6696 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
266b05cf DJ |
6697 | if (((s->flags & (SEC_EXCLUDE | SEC_ALLOC | SEC_READONLY)) |
6698 | == (SEC_ALLOC | SEC_READONLY)) | |
74541ad4 AM |
6699 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) |
6700 | { | |
266b05cf | 6701 | elf_hash_table (info)->text_index_section = s; |
74541ad4 AM |
6702 | break; |
6703 | } | |
6704 | ||
6705 | if (elf_hash_table (info)->text_index_section == NULL) | |
6706 | elf_hash_table (info)->text_index_section | |
6707 | = elf_hash_table (info)->data_index_section; | |
6708 | } | |
6709 | ||
8423293d AM |
6710 | bfd_boolean |
6711 | bfd_elf_size_dynsym_hash_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
6712 | { | |
74541ad4 AM |
6713 | const struct elf_backend_data *bed; |
6714 | ||
8423293d AM |
6715 | if (!is_elf_hash_table (info->hash)) |
6716 | return TRUE; | |
6717 | ||
74541ad4 AM |
6718 | bed = get_elf_backend_data (output_bfd); |
6719 | (*bed->elf_backend_init_index_section) (output_bfd, info); | |
6720 | ||
8423293d AM |
6721 | if (elf_hash_table (info)->dynamic_sections_created) |
6722 | { | |
6723 | bfd *dynobj; | |
8423293d AM |
6724 | asection *s; |
6725 | bfd_size_type dynsymcount; | |
6726 | unsigned long section_sym_count; | |
8423293d AM |
6727 | unsigned int dtagcount; |
6728 | ||
6729 | dynobj = elf_hash_table (info)->dynobj; | |
6730 | ||
5a580b3a AM |
6731 | /* Assign dynsym indicies. In a shared library we generate a |
6732 | section symbol for each output section, which come first. | |
6733 | Next come all of the back-end allocated local dynamic syms, | |
6734 | followed by the rest of the global symbols. */ | |
6735 | ||
554220db AM |
6736 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info, |
6737 | §ion_sym_count); | |
5a580b3a AM |
6738 | |
6739 | /* Work out the size of the symbol version section. */ | |
3d4d4302 | 6740 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
5a580b3a | 6741 | BFD_ASSERT (s != NULL); |
d5486c43 | 6742 | if ((s->flags & SEC_EXCLUDE) == 0) |
5a580b3a | 6743 | { |
eea6121a | 6744 | s->size = dynsymcount * sizeof (Elf_External_Versym); |
a50b1753 | 6745 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
5a580b3a AM |
6746 | if (s->contents == NULL) |
6747 | return FALSE; | |
6748 | ||
6749 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERSYM, 0)) | |
6750 | return FALSE; | |
6751 | } | |
6752 | ||
6753 | /* Set the size of the .dynsym and .hash sections. We counted | |
6754 | the number of dynamic symbols in elf_link_add_object_symbols. | |
6755 | We will build the contents of .dynsym and .hash when we build | |
6756 | the final symbol table, because until then we do not know the | |
6757 | correct value to give the symbols. We built the .dynstr | |
6758 | section as we went along in elf_link_add_object_symbols. */ | |
cae1fbbb | 6759 | s = elf_hash_table (info)->dynsym; |
5a580b3a | 6760 | BFD_ASSERT (s != NULL); |
eea6121a | 6761 | s->size = dynsymcount * bed->s->sizeof_sym; |
5a580b3a | 6762 | |
d5486c43 L |
6763 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
6764 | if (s->contents == NULL) | |
6765 | return FALSE; | |
5a580b3a | 6766 | |
d5486c43 L |
6767 | /* The first entry in .dynsym is a dummy symbol. Clear all the |
6768 | section syms, in case we don't output them all. */ | |
6769 | ++section_sym_count; | |
6770 | memset (s->contents, 0, section_sym_count * bed->s->sizeof_sym); | |
5a580b3a | 6771 | |
fdc90cb4 JJ |
6772 | elf_hash_table (info)->bucketcount = 0; |
6773 | ||
5a580b3a AM |
6774 | /* Compute the size of the hashing table. As a side effect this |
6775 | computes the hash values for all the names we export. */ | |
fdc90cb4 JJ |
6776 | if (info->emit_hash) |
6777 | { | |
6778 | unsigned long int *hashcodes; | |
14b1c01e | 6779 | struct hash_codes_info hashinf; |
fdc90cb4 JJ |
6780 | bfd_size_type amt; |
6781 | unsigned long int nsyms; | |
6782 | size_t bucketcount; | |
6783 | size_t hash_entry_size; | |
6784 | ||
6785 | /* Compute the hash values for all exported symbols. At the same | |
6786 | time store the values in an array so that we could use them for | |
6787 | optimizations. */ | |
6788 | amt = dynsymcount * sizeof (unsigned long int); | |
a50b1753 | 6789 | hashcodes = (unsigned long int *) bfd_malloc (amt); |
fdc90cb4 JJ |
6790 | if (hashcodes == NULL) |
6791 | return FALSE; | |
14b1c01e AM |
6792 | hashinf.hashcodes = hashcodes; |
6793 | hashinf.error = FALSE; | |
5a580b3a | 6794 | |
fdc90cb4 JJ |
6795 | /* Put all hash values in HASHCODES. */ |
6796 | elf_link_hash_traverse (elf_hash_table (info), | |
14b1c01e AM |
6797 | elf_collect_hash_codes, &hashinf); |
6798 | if (hashinf.error) | |
4dd07732 AM |
6799 | { |
6800 | free (hashcodes); | |
6801 | return FALSE; | |
6802 | } | |
5a580b3a | 6803 | |
14b1c01e | 6804 | nsyms = hashinf.hashcodes - hashcodes; |
fdc90cb4 JJ |
6805 | bucketcount |
6806 | = compute_bucket_count (info, hashcodes, nsyms, 0); | |
6807 | free (hashcodes); | |
6808 | ||
6809 | if (bucketcount == 0) | |
6810 | return FALSE; | |
5a580b3a | 6811 | |
fdc90cb4 JJ |
6812 | elf_hash_table (info)->bucketcount = bucketcount; |
6813 | ||
3d4d4302 | 6814 | s = bfd_get_linker_section (dynobj, ".hash"); |
fdc90cb4 JJ |
6815 | BFD_ASSERT (s != NULL); |
6816 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; | |
6817 | s->size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
a50b1753 | 6818 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6819 | if (s->contents == NULL) |
6820 | return FALSE; | |
6821 | ||
6822 | bfd_put (8 * hash_entry_size, output_bfd, bucketcount, s->contents); | |
6823 | bfd_put (8 * hash_entry_size, output_bfd, dynsymcount, | |
6824 | s->contents + hash_entry_size); | |
6825 | } | |
6826 | ||
6827 | if (info->emit_gnu_hash) | |
6828 | { | |
6829 | size_t i, cnt; | |
6830 | unsigned char *contents; | |
6831 | struct collect_gnu_hash_codes cinfo; | |
6832 | bfd_size_type amt; | |
6833 | size_t bucketcount; | |
6834 | ||
6835 | memset (&cinfo, 0, sizeof (cinfo)); | |
6836 | ||
6837 | /* Compute the hash values for all exported symbols. At the same | |
6838 | time store the values in an array so that we could use them for | |
6839 | optimizations. */ | |
6840 | amt = dynsymcount * 2 * sizeof (unsigned long int); | |
a50b1753 | 6841 | cinfo.hashcodes = (long unsigned int *) bfd_malloc (amt); |
fdc90cb4 JJ |
6842 | if (cinfo.hashcodes == NULL) |
6843 | return FALSE; | |
6844 | ||
6845 | cinfo.hashval = cinfo.hashcodes + dynsymcount; | |
6846 | cinfo.min_dynindx = -1; | |
6847 | cinfo.output_bfd = output_bfd; | |
6848 | cinfo.bed = bed; | |
6849 | ||
6850 | /* Put all hash values in HASHCODES. */ | |
6851 | elf_link_hash_traverse (elf_hash_table (info), | |
6852 | elf_collect_gnu_hash_codes, &cinfo); | |
14b1c01e | 6853 | if (cinfo.error) |
4dd07732 AM |
6854 | { |
6855 | free (cinfo.hashcodes); | |
6856 | return FALSE; | |
6857 | } | |
fdc90cb4 JJ |
6858 | |
6859 | bucketcount | |
6860 | = compute_bucket_count (info, cinfo.hashcodes, cinfo.nsyms, 1); | |
6861 | ||
6862 | if (bucketcount == 0) | |
6863 | { | |
6864 | free (cinfo.hashcodes); | |
6865 | return FALSE; | |
6866 | } | |
6867 | ||
3d4d4302 | 6868 | s = bfd_get_linker_section (dynobj, ".gnu.hash"); |
fdc90cb4 JJ |
6869 | BFD_ASSERT (s != NULL); |
6870 | ||
6871 | if (cinfo.nsyms == 0) | |
6872 | { | |
6873 | /* Empty .gnu.hash section is special. */ | |
6874 | BFD_ASSERT (cinfo.min_dynindx == -1); | |
6875 | free (cinfo.hashcodes); | |
6876 | s->size = 5 * 4 + bed->s->arch_size / 8; | |
a50b1753 | 6877 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6878 | if (contents == NULL) |
6879 | return FALSE; | |
6880 | s->contents = contents; | |
6881 | /* 1 empty bucket. */ | |
6882 | bfd_put_32 (output_bfd, 1, contents); | |
6883 | /* SYMIDX above the special symbol 0. */ | |
6884 | bfd_put_32 (output_bfd, 1, contents + 4); | |
6885 | /* Just one word for bitmask. */ | |
6886 | bfd_put_32 (output_bfd, 1, contents + 8); | |
6887 | /* Only hash fn bloom filter. */ | |
6888 | bfd_put_32 (output_bfd, 0, contents + 12); | |
6889 | /* No hashes are valid - empty bitmask. */ | |
6890 | bfd_put (bed->s->arch_size, output_bfd, 0, contents + 16); | |
6891 | /* No hashes in the only bucket. */ | |
6892 | bfd_put_32 (output_bfd, 0, | |
6893 | contents + 16 + bed->s->arch_size / 8); | |
6894 | } | |
6895 | else | |
6896 | { | |
9e6619e2 | 6897 | unsigned long int maskwords, maskbitslog2, x; |
0b33793d | 6898 | BFD_ASSERT (cinfo.min_dynindx != -1); |
fdc90cb4 | 6899 | |
9e6619e2 AM |
6900 | x = cinfo.nsyms; |
6901 | maskbitslog2 = 1; | |
6902 | while ((x >>= 1) != 0) | |
6903 | ++maskbitslog2; | |
fdc90cb4 JJ |
6904 | if (maskbitslog2 < 3) |
6905 | maskbitslog2 = 5; | |
6906 | else if ((1 << (maskbitslog2 - 2)) & cinfo.nsyms) | |
6907 | maskbitslog2 = maskbitslog2 + 3; | |
6908 | else | |
6909 | maskbitslog2 = maskbitslog2 + 2; | |
6910 | if (bed->s->arch_size == 64) | |
6911 | { | |
6912 | if (maskbitslog2 == 5) | |
6913 | maskbitslog2 = 6; | |
6914 | cinfo.shift1 = 6; | |
6915 | } | |
6916 | else | |
6917 | cinfo.shift1 = 5; | |
6918 | cinfo.mask = (1 << cinfo.shift1) - 1; | |
2ccdbfcc | 6919 | cinfo.shift2 = maskbitslog2; |
fdc90cb4 JJ |
6920 | cinfo.maskbits = 1 << maskbitslog2; |
6921 | maskwords = 1 << (maskbitslog2 - cinfo.shift1); | |
6922 | amt = bucketcount * sizeof (unsigned long int) * 2; | |
6923 | amt += maskwords * sizeof (bfd_vma); | |
a50b1753 | 6924 | cinfo.bitmask = (bfd_vma *) bfd_malloc (amt); |
fdc90cb4 JJ |
6925 | if (cinfo.bitmask == NULL) |
6926 | { | |
6927 | free (cinfo.hashcodes); | |
6928 | return FALSE; | |
6929 | } | |
6930 | ||
a50b1753 | 6931 | cinfo.counts = (long unsigned int *) (cinfo.bitmask + maskwords); |
fdc90cb4 JJ |
6932 | cinfo.indx = cinfo.counts + bucketcount; |
6933 | cinfo.symindx = dynsymcount - cinfo.nsyms; | |
6934 | memset (cinfo.bitmask, 0, maskwords * sizeof (bfd_vma)); | |
6935 | ||
6936 | /* Determine how often each hash bucket is used. */ | |
6937 | memset (cinfo.counts, 0, bucketcount * sizeof (cinfo.counts[0])); | |
6938 | for (i = 0; i < cinfo.nsyms; ++i) | |
6939 | ++cinfo.counts[cinfo.hashcodes[i] % bucketcount]; | |
6940 | ||
6941 | for (i = 0, cnt = cinfo.symindx; i < bucketcount; ++i) | |
6942 | if (cinfo.counts[i] != 0) | |
6943 | { | |
6944 | cinfo.indx[i] = cnt; | |
6945 | cnt += cinfo.counts[i]; | |
6946 | } | |
6947 | BFD_ASSERT (cnt == dynsymcount); | |
6948 | cinfo.bucketcount = bucketcount; | |
6949 | cinfo.local_indx = cinfo.min_dynindx; | |
6950 | ||
6951 | s->size = (4 + bucketcount + cinfo.nsyms) * 4; | |
6952 | s->size += cinfo.maskbits / 8; | |
a50b1753 | 6953 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6954 | if (contents == NULL) |
6955 | { | |
6956 | free (cinfo.bitmask); | |
6957 | free (cinfo.hashcodes); | |
6958 | return FALSE; | |
6959 | } | |
6960 | ||
6961 | s->contents = contents; | |
6962 | bfd_put_32 (output_bfd, bucketcount, contents); | |
6963 | bfd_put_32 (output_bfd, cinfo.symindx, contents + 4); | |
6964 | bfd_put_32 (output_bfd, maskwords, contents + 8); | |
6965 | bfd_put_32 (output_bfd, cinfo.shift2, contents + 12); | |
6966 | contents += 16 + cinfo.maskbits / 8; | |
6967 | ||
6968 | for (i = 0; i < bucketcount; ++i) | |
6969 | { | |
6970 | if (cinfo.counts[i] == 0) | |
6971 | bfd_put_32 (output_bfd, 0, contents); | |
6972 | else | |
6973 | bfd_put_32 (output_bfd, cinfo.indx[i], contents); | |
6974 | contents += 4; | |
6975 | } | |
6976 | ||
6977 | cinfo.contents = contents; | |
6978 | ||
6979 | /* Renumber dynamic symbols, populate .gnu.hash section. */ | |
6980 | elf_link_hash_traverse (elf_hash_table (info), | |
6981 | elf_renumber_gnu_hash_syms, &cinfo); | |
6982 | ||
6983 | contents = s->contents + 16; | |
6984 | for (i = 0; i < maskwords; ++i) | |
6985 | { | |
6986 | bfd_put (bed->s->arch_size, output_bfd, cinfo.bitmask[i], | |
6987 | contents); | |
6988 | contents += bed->s->arch_size / 8; | |
6989 | } | |
6990 | ||
6991 | free (cinfo.bitmask); | |
6992 | free (cinfo.hashcodes); | |
6993 | } | |
6994 | } | |
5a580b3a | 6995 | |
3d4d4302 | 6996 | s = bfd_get_linker_section (dynobj, ".dynstr"); |
5a580b3a AM |
6997 | BFD_ASSERT (s != NULL); |
6998 | ||
4ad4eba5 | 6999 | elf_finalize_dynstr (output_bfd, info); |
5a580b3a | 7000 | |
eea6121a | 7001 | s->size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
5a580b3a AM |
7002 | |
7003 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) | |
7004 | if (!_bfd_elf_add_dynamic_entry (info, DT_NULL, 0)) | |
7005 | return FALSE; | |
7006 | } | |
7007 | ||
7008 | return TRUE; | |
7009 | } | |
4d269e42 | 7010 | \f |
4d269e42 AM |
7011 | /* Make sure sec_info_type is cleared if sec_info is cleared too. */ |
7012 | ||
7013 | static void | |
7014 | merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED, | |
7015 | asection *sec) | |
7016 | { | |
dbaa2011 AM |
7017 | BFD_ASSERT (sec->sec_info_type == SEC_INFO_TYPE_MERGE); |
7018 | sec->sec_info_type = SEC_INFO_TYPE_NONE; | |
4d269e42 AM |
7019 | } |
7020 | ||
7021 | /* Finish SHF_MERGE section merging. */ | |
7022 | ||
7023 | bfd_boolean | |
630993ec | 7024 | _bfd_elf_merge_sections (bfd *obfd, struct bfd_link_info *info) |
4d269e42 AM |
7025 | { |
7026 | bfd *ibfd; | |
7027 | asection *sec; | |
7028 | ||
7029 | if (!is_elf_hash_table (info->hash)) | |
7030 | return FALSE; | |
7031 | ||
c72f2fb2 | 7032 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
630993ec AM |
7033 | if ((ibfd->flags & DYNAMIC) == 0 |
7034 | && bfd_get_flavour (ibfd) == bfd_target_elf_flavour | |
017e6bce AM |
7035 | && (elf_elfheader (ibfd)->e_ident[EI_CLASS] |
7036 | == get_elf_backend_data (obfd)->s->elfclass)) | |
4d269e42 AM |
7037 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
7038 | if ((sec->flags & SEC_MERGE) != 0 | |
7039 | && !bfd_is_abs_section (sec->output_section)) | |
7040 | { | |
7041 | struct bfd_elf_section_data *secdata; | |
7042 | ||
7043 | secdata = elf_section_data (sec); | |
630993ec | 7044 | if (! _bfd_add_merge_section (obfd, |
4d269e42 AM |
7045 | &elf_hash_table (info)->merge_info, |
7046 | sec, &secdata->sec_info)) | |
7047 | return FALSE; | |
7048 | else if (secdata->sec_info) | |
dbaa2011 | 7049 | sec->sec_info_type = SEC_INFO_TYPE_MERGE; |
4d269e42 AM |
7050 | } |
7051 | ||
7052 | if (elf_hash_table (info)->merge_info != NULL) | |
630993ec | 7053 | _bfd_merge_sections (obfd, info, elf_hash_table (info)->merge_info, |
4d269e42 AM |
7054 | merge_sections_remove_hook); |
7055 | return TRUE; | |
7056 | } | |
7057 | ||
7058 | /* Create an entry in an ELF linker hash table. */ | |
7059 | ||
7060 | struct bfd_hash_entry * | |
7061 | _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry, | |
7062 | struct bfd_hash_table *table, | |
7063 | const char *string) | |
7064 | { | |
7065 | /* Allocate the structure if it has not already been allocated by a | |
7066 | subclass. */ | |
7067 | if (entry == NULL) | |
7068 | { | |
a50b1753 | 7069 | entry = (struct bfd_hash_entry *) |
ca4be51c | 7070 | bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)); |
4d269e42 AM |
7071 | if (entry == NULL) |
7072 | return entry; | |
7073 | } | |
7074 | ||
7075 | /* Call the allocation method of the superclass. */ | |
7076 | entry = _bfd_link_hash_newfunc (entry, table, string); | |
7077 | if (entry != NULL) | |
7078 | { | |
7079 | struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; | |
7080 | struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table; | |
7081 | ||
7082 | /* Set local fields. */ | |
7083 | ret->indx = -1; | |
7084 | ret->dynindx = -1; | |
7085 | ret->got = htab->init_got_refcount; | |
7086 | ret->plt = htab->init_plt_refcount; | |
7087 | memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry) | |
7088 | - offsetof (struct elf_link_hash_entry, size))); | |
7089 | /* Assume that we have been called by a non-ELF symbol reader. | |
7090 | This flag is then reset by the code which reads an ELF input | |
7091 | file. This ensures that a symbol created by a non-ELF symbol | |
7092 | reader will have the flag set correctly. */ | |
7093 | ret->non_elf = 1; | |
7094 | } | |
7095 | ||
7096 | return entry; | |
7097 | } | |
7098 | ||
7099 | /* Copy data from an indirect symbol to its direct symbol, hiding the | |
7100 | old indirect symbol. Also used for copying flags to a weakdef. */ | |
7101 | ||
7102 | void | |
7103 | _bfd_elf_link_hash_copy_indirect (struct bfd_link_info *info, | |
7104 | struct elf_link_hash_entry *dir, | |
7105 | struct elf_link_hash_entry *ind) | |
7106 | { | |
7107 | struct elf_link_hash_table *htab; | |
7108 | ||
7109 | /* Copy down any references that we may have already seen to the | |
e81830c5 | 7110 | symbol which just became indirect. */ |
4d269e42 | 7111 | |
422f1182 | 7112 | if (dir->versioned != versioned_hidden) |
e81830c5 AM |
7113 | dir->ref_dynamic |= ind->ref_dynamic; |
7114 | dir->ref_regular |= ind->ref_regular; | |
7115 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
7116 | dir->non_got_ref |= ind->non_got_ref; | |
7117 | dir->needs_plt |= ind->needs_plt; | |
7118 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
4d269e42 AM |
7119 | |
7120 | if (ind->root.type != bfd_link_hash_indirect) | |
7121 | return; | |
7122 | ||
7123 | /* Copy over the global and procedure linkage table refcount entries. | |
7124 | These may have been already set up by a check_relocs routine. */ | |
7125 | htab = elf_hash_table (info); | |
7126 | if (ind->got.refcount > htab->init_got_refcount.refcount) | |
7127 | { | |
7128 | if (dir->got.refcount < 0) | |
7129 | dir->got.refcount = 0; | |
7130 | dir->got.refcount += ind->got.refcount; | |
7131 | ind->got.refcount = htab->init_got_refcount.refcount; | |
7132 | } | |
7133 | ||
7134 | if (ind->plt.refcount > htab->init_plt_refcount.refcount) | |
7135 | { | |
7136 | if (dir->plt.refcount < 0) | |
7137 | dir->plt.refcount = 0; | |
7138 | dir->plt.refcount += ind->plt.refcount; | |
7139 | ind->plt.refcount = htab->init_plt_refcount.refcount; | |
7140 | } | |
7141 | ||
7142 | if (ind->dynindx != -1) | |
7143 | { | |
7144 | if (dir->dynindx != -1) | |
7145 | _bfd_elf_strtab_delref (htab->dynstr, dir->dynstr_index); | |
7146 | dir->dynindx = ind->dynindx; | |
7147 | dir->dynstr_index = ind->dynstr_index; | |
7148 | ind->dynindx = -1; | |
7149 | ind->dynstr_index = 0; | |
7150 | } | |
7151 | } | |
7152 | ||
7153 | void | |
7154 | _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info, | |
7155 | struct elf_link_hash_entry *h, | |
7156 | bfd_boolean force_local) | |
7157 | { | |
3aa14d16 L |
7158 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
7159 | if (h->type != STT_GNU_IFUNC) | |
7160 | { | |
7161 | h->plt = elf_hash_table (info)->init_plt_offset; | |
7162 | h->needs_plt = 0; | |
7163 | } | |
4d269e42 AM |
7164 | if (force_local) |
7165 | { | |
7166 | h->forced_local = 1; | |
7167 | if (h->dynindx != -1) | |
7168 | { | |
7169 | h->dynindx = -1; | |
7170 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
7171 | h->dynstr_index); | |
7172 | } | |
7173 | } | |
7174 | } | |
7175 | ||
7bf52ea2 AM |
7176 | /* Initialize an ELF linker hash table. *TABLE has been zeroed by our |
7177 | caller. */ | |
4d269e42 AM |
7178 | |
7179 | bfd_boolean | |
7180 | _bfd_elf_link_hash_table_init | |
7181 | (struct elf_link_hash_table *table, | |
7182 | bfd *abfd, | |
7183 | struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *, | |
7184 | struct bfd_hash_table *, | |
7185 | const char *), | |
4dfe6ac6 NC |
7186 | unsigned int entsize, |
7187 | enum elf_target_id target_id) | |
4d269e42 AM |
7188 | { |
7189 | bfd_boolean ret; | |
7190 | int can_refcount = get_elf_backend_data (abfd)->can_refcount; | |
7191 | ||
4d269e42 AM |
7192 | table->init_got_refcount.refcount = can_refcount - 1; |
7193 | table->init_plt_refcount.refcount = can_refcount - 1; | |
7194 | table->init_got_offset.offset = -(bfd_vma) 1; | |
7195 | table->init_plt_offset.offset = -(bfd_vma) 1; | |
7196 | /* The first dynamic symbol is a dummy. */ | |
7197 | table->dynsymcount = 1; | |
7198 | ||
7199 | ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); | |
4dfe6ac6 | 7200 | |
4d269e42 | 7201 | table->root.type = bfd_link_elf_hash_table; |
4dfe6ac6 | 7202 | table->hash_table_id = target_id; |
4d269e42 AM |
7203 | |
7204 | return ret; | |
7205 | } | |
7206 | ||
7207 | /* Create an ELF linker hash table. */ | |
7208 | ||
7209 | struct bfd_link_hash_table * | |
7210 | _bfd_elf_link_hash_table_create (bfd *abfd) | |
7211 | { | |
7212 | struct elf_link_hash_table *ret; | |
7213 | bfd_size_type amt = sizeof (struct elf_link_hash_table); | |
7214 | ||
7bf52ea2 | 7215 | ret = (struct elf_link_hash_table *) bfd_zmalloc (amt); |
4d269e42 AM |
7216 | if (ret == NULL) |
7217 | return NULL; | |
7218 | ||
7219 | if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc, | |
4dfe6ac6 NC |
7220 | sizeof (struct elf_link_hash_entry), |
7221 | GENERIC_ELF_DATA)) | |
4d269e42 AM |
7222 | { |
7223 | free (ret); | |
7224 | return NULL; | |
7225 | } | |
d495ab0d | 7226 | ret->root.hash_table_free = _bfd_elf_link_hash_table_free; |
4d269e42 AM |
7227 | |
7228 | return &ret->root; | |
7229 | } | |
7230 | ||
9f7c3e5e AM |
7231 | /* Destroy an ELF linker hash table. */ |
7232 | ||
7233 | void | |
d495ab0d | 7234 | _bfd_elf_link_hash_table_free (bfd *obfd) |
9f7c3e5e | 7235 | { |
d495ab0d AM |
7236 | struct elf_link_hash_table *htab; |
7237 | ||
7238 | htab = (struct elf_link_hash_table *) obfd->link.hash; | |
9f7c3e5e AM |
7239 | if (htab->dynstr != NULL) |
7240 | _bfd_elf_strtab_free (htab->dynstr); | |
7241 | _bfd_merge_sections_free (htab->merge_info); | |
d495ab0d | 7242 | _bfd_generic_link_hash_table_free (obfd); |
9f7c3e5e AM |
7243 | } |
7244 | ||
4d269e42 AM |
7245 | /* This is a hook for the ELF emulation code in the generic linker to |
7246 | tell the backend linker what file name to use for the DT_NEEDED | |
7247 | entry for a dynamic object. */ | |
7248 | ||
7249 | void | |
7250 | bfd_elf_set_dt_needed_name (bfd *abfd, const char *name) | |
7251 | { | |
7252 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7253 | && bfd_get_format (abfd) == bfd_object) | |
7254 | elf_dt_name (abfd) = name; | |
7255 | } | |
7256 | ||
7257 | int | |
7258 | bfd_elf_get_dyn_lib_class (bfd *abfd) | |
7259 | { | |
7260 | int lib_class; | |
7261 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7262 | && bfd_get_format (abfd) == bfd_object) | |
7263 | lib_class = elf_dyn_lib_class (abfd); | |
7264 | else | |
7265 | lib_class = 0; | |
7266 | return lib_class; | |
7267 | } | |
7268 | ||
7269 | void | |
7270 | bfd_elf_set_dyn_lib_class (bfd *abfd, enum dynamic_lib_link_class lib_class) | |
7271 | { | |
7272 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7273 | && bfd_get_format (abfd) == bfd_object) | |
7274 | elf_dyn_lib_class (abfd) = lib_class; | |
7275 | } | |
7276 | ||
7277 | /* Get the list of DT_NEEDED entries for a link. This is a hook for | |
7278 | the linker ELF emulation code. */ | |
7279 | ||
7280 | struct bfd_link_needed_list * | |
7281 | bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7282 | struct bfd_link_info *info) | |
7283 | { | |
7284 | if (! is_elf_hash_table (info->hash)) | |
7285 | return NULL; | |
7286 | return elf_hash_table (info)->needed; | |
7287 | } | |
7288 | ||
7289 | /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a | |
7290 | hook for the linker ELF emulation code. */ | |
7291 | ||
7292 | struct bfd_link_needed_list * | |
7293 | bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7294 | struct bfd_link_info *info) | |
7295 | { | |
7296 | if (! is_elf_hash_table (info->hash)) | |
7297 | return NULL; | |
7298 | return elf_hash_table (info)->runpath; | |
7299 | } | |
7300 | ||
7301 | /* Get the name actually used for a dynamic object for a link. This | |
7302 | is the SONAME entry if there is one. Otherwise, it is the string | |
7303 | passed to bfd_elf_set_dt_needed_name, or it is the filename. */ | |
7304 | ||
7305 | const char * | |
7306 | bfd_elf_get_dt_soname (bfd *abfd) | |
7307 | { | |
7308 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7309 | && bfd_get_format (abfd) == bfd_object) | |
7310 | return elf_dt_name (abfd); | |
7311 | return NULL; | |
7312 | } | |
7313 | ||
7314 | /* Get the list of DT_NEEDED entries from a BFD. This is a hook for | |
7315 | the ELF linker emulation code. */ | |
7316 | ||
7317 | bfd_boolean | |
7318 | bfd_elf_get_bfd_needed_list (bfd *abfd, | |
7319 | struct bfd_link_needed_list **pneeded) | |
7320 | { | |
7321 | asection *s; | |
7322 | bfd_byte *dynbuf = NULL; | |
cb33740c | 7323 | unsigned int elfsec; |
4d269e42 AM |
7324 | unsigned long shlink; |
7325 | bfd_byte *extdyn, *extdynend; | |
7326 | size_t extdynsize; | |
7327 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
7328 | ||
7329 | *pneeded = NULL; | |
7330 | ||
7331 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour | |
7332 | || bfd_get_format (abfd) != bfd_object) | |
7333 | return TRUE; | |
7334 | ||
7335 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
7336 | if (s == NULL || s->size == 0) | |
7337 | return TRUE; | |
7338 | ||
7339 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) | |
7340 | goto error_return; | |
7341 | ||
7342 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 7343 | if (elfsec == SHN_BAD) |
4d269e42 AM |
7344 | goto error_return; |
7345 | ||
7346 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
c152c796 | 7347 | |
4d269e42 AM |
7348 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
7349 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
7350 | ||
7351 | extdyn = dynbuf; | |
7352 | extdynend = extdyn + s->size; | |
7353 | for (; extdyn < extdynend; extdyn += extdynsize) | |
7354 | { | |
7355 | Elf_Internal_Dyn dyn; | |
7356 | ||
7357 | (*swap_dyn_in) (abfd, extdyn, &dyn); | |
7358 | ||
7359 | if (dyn.d_tag == DT_NULL) | |
7360 | break; | |
7361 | ||
7362 | if (dyn.d_tag == DT_NEEDED) | |
7363 | { | |
7364 | const char *string; | |
7365 | struct bfd_link_needed_list *l; | |
7366 | unsigned int tagv = dyn.d_un.d_val; | |
7367 | bfd_size_type amt; | |
7368 | ||
7369 | string = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
7370 | if (string == NULL) | |
7371 | goto error_return; | |
7372 | ||
7373 | amt = sizeof *l; | |
a50b1753 | 7374 | l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4d269e42 AM |
7375 | if (l == NULL) |
7376 | goto error_return; | |
7377 | ||
7378 | l->by = abfd; | |
7379 | l->name = string; | |
7380 | l->next = *pneeded; | |
7381 | *pneeded = l; | |
7382 | } | |
7383 | } | |
7384 | ||
7385 | free (dynbuf); | |
7386 | ||
7387 | return TRUE; | |
7388 | ||
7389 | error_return: | |
7390 | if (dynbuf != NULL) | |
7391 | free (dynbuf); | |
7392 | return FALSE; | |
7393 | } | |
7394 | ||
7395 | struct elf_symbuf_symbol | |
7396 | { | |
7397 | unsigned long st_name; /* Symbol name, index in string tbl */ | |
7398 | unsigned char st_info; /* Type and binding attributes */ | |
7399 | unsigned char st_other; /* Visibilty, and target specific */ | |
7400 | }; | |
7401 | ||
7402 | struct elf_symbuf_head | |
7403 | { | |
7404 | struct elf_symbuf_symbol *ssym; | |
ef53be89 | 7405 | size_t count; |
4d269e42 AM |
7406 | unsigned int st_shndx; |
7407 | }; | |
7408 | ||
7409 | struct elf_symbol | |
7410 | { | |
7411 | union | |
7412 | { | |
7413 | Elf_Internal_Sym *isym; | |
7414 | struct elf_symbuf_symbol *ssym; | |
7415 | } u; | |
7416 | const char *name; | |
7417 | }; | |
7418 | ||
7419 | /* Sort references to symbols by ascending section number. */ | |
7420 | ||
7421 | static int | |
7422 | elf_sort_elf_symbol (const void *arg1, const void *arg2) | |
7423 | { | |
7424 | const Elf_Internal_Sym *s1 = *(const Elf_Internal_Sym **) arg1; | |
7425 | const Elf_Internal_Sym *s2 = *(const Elf_Internal_Sym **) arg2; | |
7426 | ||
7427 | return s1->st_shndx - s2->st_shndx; | |
7428 | } | |
7429 | ||
7430 | static int | |
7431 | elf_sym_name_compare (const void *arg1, const void *arg2) | |
7432 | { | |
7433 | const struct elf_symbol *s1 = (const struct elf_symbol *) arg1; | |
7434 | const struct elf_symbol *s2 = (const struct elf_symbol *) arg2; | |
7435 | return strcmp (s1->name, s2->name); | |
7436 | } | |
7437 | ||
7438 | static struct elf_symbuf_head * | |
ef53be89 | 7439 | elf_create_symbuf (size_t symcount, Elf_Internal_Sym *isymbuf) |
4d269e42 | 7440 | { |
14b1c01e | 7441 | Elf_Internal_Sym **ind, **indbufend, **indbuf; |
4d269e42 AM |
7442 | struct elf_symbuf_symbol *ssym; |
7443 | struct elf_symbuf_head *ssymbuf, *ssymhead; | |
ef53be89 | 7444 | size_t i, shndx_count, total_size; |
4d269e42 | 7445 | |
a50b1753 | 7446 | indbuf = (Elf_Internal_Sym **) bfd_malloc2 (symcount, sizeof (*indbuf)); |
4d269e42 AM |
7447 | if (indbuf == NULL) |
7448 | return NULL; | |
7449 | ||
7450 | for (ind = indbuf, i = 0; i < symcount; i++) | |
7451 | if (isymbuf[i].st_shndx != SHN_UNDEF) | |
7452 | *ind++ = &isymbuf[i]; | |
7453 | indbufend = ind; | |
7454 | ||
7455 | qsort (indbuf, indbufend - indbuf, sizeof (Elf_Internal_Sym *), | |
7456 | elf_sort_elf_symbol); | |
7457 | ||
7458 | shndx_count = 0; | |
7459 | if (indbufend > indbuf) | |
7460 | for (ind = indbuf, shndx_count++; ind < indbufend - 1; ind++) | |
7461 | if (ind[0]->st_shndx != ind[1]->st_shndx) | |
7462 | shndx_count++; | |
7463 | ||
3ae181ee L |
7464 | total_size = ((shndx_count + 1) * sizeof (*ssymbuf) |
7465 | + (indbufend - indbuf) * sizeof (*ssym)); | |
a50b1753 | 7466 | ssymbuf = (struct elf_symbuf_head *) bfd_malloc (total_size); |
4d269e42 AM |
7467 | if (ssymbuf == NULL) |
7468 | { | |
7469 | free (indbuf); | |
7470 | return NULL; | |
7471 | } | |
7472 | ||
3ae181ee | 7473 | ssym = (struct elf_symbuf_symbol *) (ssymbuf + shndx_count + 1); |
4d269e42 AM |
7474 | ssymbuf->ssym = NULL; |
7475 | ssymbuf->count = shndx_count; | |
7476 | ssymbuf->st_shndx = 0; | |
7477 | for (ssymhead = ssymbuf, ind = indbuf; ind < indbufend; ssym++, ind++) | |
7478 | { | |
7479 | if (ind == indbuf || ssymhead->st_shndx != (*ind)->st_shndx) | |
7480 | { | |
7481 | ssymhead++; | |
7482 | ssymhead->ssym = ssym; | |
7483 | ssymhead->count = 0; | |
7484 | ssymhead->st_shndx = (*ind)->st_shndx; | |
7485 | } | |
7486 | ssym->st_name = (*ind)->st_name; | |
7487 | ssym->st_info = (*ind)->st_info; | |
7488 | ssym->st_other = (*ind)->st_other; | |
7489 | ssymhead->count++; | |
7490 | } | |
ef53be89 | 7491 | BFD_ASSERT ((size_t) (ssymhead - ssymbuf) == shndx_count |
3ae181ee L |
7492 | && (((bfd_hostptr_t) ssym - (bfd_hostptr_t) ssymbuf) |
7493 | == total_size)); | |
4d269e42 AM |
7494 | |
7495 | free (indbuf); | |
7496 | return ssymbuf; | |
7497 | } | |
7498 | ||
7499 | /* Check if 2 sections define the same set of local and global | |
7500 | symbols. */ | |
7501 | ||
8f317e31 | 7502 | static bfd_boolean |
4d269e42 AM |
7503 | bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2, |
7504 | struct bfd_link_info *info) | |
7505 | { | |
7506 | bfd *bfd1, *bfd2; | |
7507 | const struct elf_backend_data *bed1, *bed2; | |
7508 | Elf_Internal_Shdr *hdr1, *hdr2; | |
ef53be89 | 7509 | size_t symcount1, symcount2; |
4d269e42 AM |
7510 | Elf_Internal_Sym *isymbuf1, *isymbuf2; |
7511 | struct elf_symbuf_head *ssymbuf1, *ssymbuf2; | |
7512 | Elf_Internal_Sym *isym, *isymend; | |
7513 | struct elf_symbol *symtable1 = NULL, *symtable2 = NULL; | |
ef53be89 | 7514 | size_t count1, count2, i; |
cb33740c | 7515 | unsigned int shndx1, shndx2; |
4d269e42 AM |
7516 | bfd_boolean result; |
7517 | ||
7518 | bfd1 = sec1->owner; | |
7519 | bfd2 = sec2->owner; | |
7520 | ||
4d269e42 AM |
7521 | /* Both sections have to be in ELF. */ |
7522 | if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour | |
7523 | || bfd_get_flavour (bfd2) != bfd_target_elf_flavour) | |
7524 | return FALSE; | |
7525 | ||
7526 | if (elf_section_type (sec1) != elf_section_type (sec2)) | |
7527 | return FALSE; | |
7528 | ||
4d269e42 AM |
7529 | shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1); |
7530 | shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2); | |
cb33740c | 7531 | if (shndx1 == SHN_BAD || shndx2 == SHN_BAD) |
4d269e42 AM |
7532 | return FALSE; |
7533 | ||
7534 | bed1 = get_elf_backend_data (bfd1); | |
7535 | bed2 = get_elf_backend_data (bfd2); | |
7536 | hdr1 = &elf_tdata (bfd1)->symtab_hdr; | |
7537 | symcount1 = hdr1->sh_size / bed1->s->sizeof_sym; | |
7538 | hdr2 = &elf_tdata (bfd2)->symtab_hdr; | |
7539 | symcount2 = hdr2->sh_size / bed2->s->sizeof_sym; | |
7540 | ||
7541 | if (symcount1 == 0 || symcount2 == 0) | |
7542 | return FALSE; | |
7543 | ||
7544 | result = FALSE; | |
7545 | isymbuf1 = NULL; | |
7546 | isymbuf2 = NULL; | |
a50b1753 NC |
7547 | ssymbuf1 = (struct elf_symbuf_head *) elf_tdata (bfd1)->symbuf; |
7548 | ssymbuf2 = (struct elf_symbuf_head *) elf_tdata (bfd2)->symbuf; | |
4d269e42 AM |
7549 | |
7550 | if (ssymbuf1 == NULL) | |
7551 | { | |
7552 | isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0, | |
7553 | NULL, NULL, NULL); | |
7554 | if (isymbuf1 == NULL) | |
7555 | goto done; | |
7556 | ||
7557 | if (!info->reduce_memory_overheads) | |
7558 | elf_tdata (bfd1)->symbuf = ssymbuf1 | |
7559 | = elf_create_symbuf (symcount1, isymbuf1); | |
7560 | } | |
7561 | ||
7562 | if (ssymbuf1 == NULL || ssymbuf2 == NULL) | |
7563 | { | |
7564 | isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0, | |
7565 | NULL, NULL, NULL); | |
7566 | if (isymbuf2 == NULL) | |
7567 | goto done; | |
7568 | ||
7569 | if (ssymbuf1 != NULL && !info->reduce_memory_overheads) | |
7570 | elf_tdata (bfd2)->symbuf = ssymbuf2 | |
7571 | = elf_create_symbuf (symcount2, isymbuf2); | |
7572 | } | |
7573 | ||
7574 | if (ssymbuf1 != NULL && ssymbuf2 != NULL) | |
7575 | { | |
7576 | /* Optimized faster version. */ | |
ef53be89 | 7577 | size_t lo, hi, mid; |
4d269e42 AM |
7578 | struct elf_symbol *symp; |
7579 | struct elf_symbuf_symbol *ssym, *ssymend; | |
7580 | ||
7581 | lo = 0; | |
7582 | hi = ssymbuf1->count; | |
7583 | ssymbuf1++; | |
7584 | count1 = 0; | |
7585 | while (lo < hi) | |
7586 | { | |
7587 | mid = (lo + hi) / 2; | |
cb33740c | 7588 | if (shndx1 < ssymbuf1[mid].st_shndx) |
4d269e42 | 7589 | hi = mid; |
cb33740c | 7590 | else if (shndx1 > ssymbuf1[mid].st_shndx) |
4d269e42 AM |
7591 | lo = mid + 1; |
7592 | else | |
7593 | { | |
7594 | count1 = ssymbuf1[mid].count; | |
7595 | ssymbuf1 += mid; | |
7596 | break; | |
7597 | } | |
7598 | } | |
7599 | ||
7600 | lo = 0; | |
7601 | hi = ssymbuf2->count; | |
7602 | ssymbuf2++; | |
7603 | count2 = 0; | |
7604 | while (lo < hi) | |
7605 | { | |
7606 | mid = (lo + hi) / 2; | |
cb33740c | 7607 | if (shndx2 < ssymbuf2[mid].st_shndx) |
4d269e42 | 7608 | hi = mid; |
cb33740c | 7609 | else if (shndx2 > ssymbuf2[mid].st_shndx) |
4d269e42 AM |
7610 | lo = mid + 1; |
7611 | else | |
7612 | { | |
7613 | count2 = ssymbuf2[mid].count; | |
7614 | ssymbuf2 += mid; | |
7615 | break; | |
7616 | } | |
7617 | } | |
7618 | ||
7619 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
7620 | goto done; | |
7621 | ||
ca4be51c AM |
7622 | symtable1 |
7623 | = (struct elf_symbol *) bfd_malloc (count1 * sizeof (*symtable1)); | |
7624 | symtable2 | |
7625 | = (struct elf_symbol *) bfd_malloc (count2 * sizeof (*symtable2)); | |
4d269e42 AM |
7626 | if (symtable1 == NULL || symtable2 == NULL) |
7627 | goto done; | |
7628 | ||
7629 | symp = symtable1; | |
7630 | for (ssym = ssymbuf1->ssym, ssymend = ssym + count1; | |
7631 | ssym < ssymend; ssym++, symp++) | |
7632 | { | |
7633 | symp->u.ssym = ssym; | |
7634 | symp->name = bfd_elf_string_from_elf_section (bfd1, | |
7635 | hdr1->sh_link, | |
7636 | ssym->st_name); | |
7637 | } | |
7638 | ||
7639 | symp = symtable2; | |
7640 | for (ssym = ssymbuf2->ssym, ssymend = ssym + count2; | |
7641 | ssym < ssymend; ssym++, symp++) | |
7642 | { | |
7643 | symp->u.ssym = ssym; | |
7644 | symp->name = bfd_elf_string_from_elf_section (bfd2, | |
7645 | hdr2->sh_link, | |
7646 | ssym->st_name); | |
7647 | } | |
7648 | ||
7649 | /* Sort symbol by name. */ | |
7650 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
7651 | elf_sym_name_compare); | |
7652 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
7653 | elf_sym_name_compare); | |
7654 | ||
7655 | for (i = 0; i < count1; i++) | |
7656 | /* Two symbols must have the same binding, type and name. */ | |
7657 | if (symtable1 [i].u.ssym->st_info != symtable2 [i].u.ssym->st_info | |
7658 | || symtable1 [i].u.ssym->st_other != symtable2 [i].u.ssym->st_other | |
7659 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
7660 | goto done; | |
7661 | ||
7662 | result = TRUE; | |
7663 | goto done; | |
7664 | } | |
7665 | ||
a50b1753 NC |
7666 | symtable1 = (struct elf_symbol *) |
7667 | bfd_malloc (symcount1 * sizeof (struct elf_symbol)); | |
7668 | symtable2 = (struct elf_symbol *) | |
7669 | bfd_malloc (symcount2 * sizeof (struct elf_symbol)); | |
4d269e42 AM |
7670 | if (symtable1 == NULL || symtable2 == NULL) |
7671 | goto done; | |
7672 | ||
7673 | /* Count definitions in the section. */ | |
7674 | count1 = 0; | |
7675 | for (isym = isymbuf1, isymend = isym + symcount1; isym < isymend; isym++) | |
cb33740c | 7676 | if (isym->st_shndx == shndx1) |
4d269e42 AM |
7677 | symtable1[count1++].u.isym = isym; |
7678 | ||
7679 | count2 = 0; | |
7680 | for (isym = isymbuf2, isymend = isym + symcount2; isym < isymend; isym++) | |
cb33740c | 7681 | if (isym->st_shndx == shndx2) |
4d269e42 AM |
7682 | symtable2[count2++].u.isym = isym; |
7683 | ||
7684 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
7685 | goto done; | |
7686 | ||
7687 | for (i = 0; i < count1; i++) | |
7688 | symtable1[i].name | |
7689 | = bfd_elf_string_from_elf_section (bfd1, hdr1->sh_link, | |
7690 | symtable1[i].u.isym->st_name); | |
7691 | ||
7692 | for (i = 0; i < count2; i++) | |
7693 | symtable2[i].name | |
7694 | = bfd_elf_string_from_elf_section (bfd2, hdr2->sh_link, | |
7695 | symtable2[i].u.isym->st_name); | |
7696 | ||
7697 | /* Sort symbol by name. */ | |
7698 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
7699 | elf_sym_name_compare); | |
7700 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
7701 | elf_sym_name_compare); | |
7702 | ||
7703 | for (i = 0; i < count1; i++) | |
7704 | /* Two symbols must have the same binding, type and name. */ | |
7705 | if (symtable1 [i].u.isym->st_info != symtable2 [i].u.isym->st_info | |
7706 | || symtable1 [i].u.isym->st_other != symtable2 [i].u.isym->st_other | |
7707 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
7708 | goto done; | |
7709 | ||
7710 | result = TRUE; | |
7711 | ||
7712 | done: | |
7713 | if (symtable1) | |
7714 | free (symtable1); | |
7715 | if (symtable2) | |
7716 | free (symtable2); | |
7717 | if (isymbuf1) | |
7718 | free (isymbuf1); | |
7719 | if (isymbuf2) | |
7720 | free (isymbuf2); | |
7721 | ||
7722 | return result; | |
7723 | } | |
7724 | ||
7725 | /* Return TRUE if 2 section types are compatible. */ | |
7726 | ||
7727 | bfd_boolean | |
7728 | _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec, | |
7729 | bfd *bbfd, const asection *bsec) | |
7730 | { | |
7731 | if (asec == NULL | |
7732 | || bsec == NULL | |
7733 | || abfd->xvec->flavour != bfd_target_elf_flavour | |
7734 | || bbfd->xvec->flavour != bfd_target_elf_flavour) | |
7735 | return TRUE; | |
7736 | ||
7737 | return elf_section_type (asec) == elf_section_type (bsec); | |
7738 | } | |
7739 | \f | |
c152c796 AM |
7740 | /* Final phase of ELF linker. */ |
7741 | ||
7742 | /* A structure we use to avoid passing large numbers of arguments. */ | |
7743 | ||
7744 | struct elf_final_link_info | |
7745 | { | |
7746 | /* General link information. */ | |
7747 | struct bfd_link_info *info; | |
7748 | /* Output BFD. */ | |
7749 | bfd *output_bfd; | |
7750 | /* Symbol string table. */ | |
ef10c3ac | 7751 | struct elf_strtab_hash *symstrtab; |
c152c796 AM |
7752 | /* .hash section. */ |
7753 | asection *hash_sec; | |
7754 | /* symbol version section (.gnu.version). */ | |
7755 | asection *symver_sec; | |
7756 | /* Buffer large enough to hold contents of any section. */ | |
7757 | bfd_byte *contents; | |
7758 | /* Buffer large enough to hold external relocs of any section. */ | |
7759 | void *external_relocs; | |
7760 | /* Buffer large enough to hold internal relocs of any section. */ | |
7761 | Elf_Internal_Rela *internal_relocs; | |
7762 | /* Buffer large enough to hold external local symbols of any input | |
7763 | BFD. */ | |
7764 | bfd_byte *external_syms; | |
7765 | /* And a buffer for symbol section indices. */ | |
7766 | Elf_External_Sym_Shndx *locsym_shndx; | |
7767 | /* Buffer large enough to hold internal local symbols of any input | |
7768 | BFD. */ | |
7769 | Elf_Internal_Sym *internal_syms; | |
7770 | /* Array large enough to hold a symbol index for each local symbol | |
7771 | of any input BFD. */ | |
7772 | long *indices; | |
7773 | /* Array large enough to hold a section pointer for each local | |
7774 | symbol of any input BFD. */ | |
7775 | asection **sections; | |
ef10c3ac | 7776 | /* Buffer for SHT_SYMTAB_SHNDX section. */ |
c152c796 | 7777 | Elf_External_Sym_Shndx *symshndxbuf; |
ffbc01cc AM |
7778 | /* Number of STT_FILE syms seen. */ |
7779 | size_t filesym_count; | |
c152c796 AM |
7780 | }; |
7781 | ||
7782 | /* This struct is used to pass information to elf_link_output_extsym. */ | |
7783 | ||
7784 | struct elf_outext_info | |
7785 | { | |
7786 | bfd_boolean failed; | |
7787 | bfd_boolean localsyms; | |
34a79995 | 7788 | bfd_boolean file_sym_done; |
8b127cbc | 7789 | struct elf_final_link_info *flinfo; |
c152c796 AM |
7790 | }; |
7791 | ||
d9352518 DB |
7792 | |
7793 | /* Support for evaluating a complex relocation. | |
7794 | ||
7795 | Complex relocations are generalized, self-describing relocations. The | |
7796 | implementation of them consists of two parts: complex symbols, and the | |
a0c8462f | 7797 | relocations themselves. |
d9352518 DB |
7798 | |
7799 | The relocations are use a reserved elf-wide relocation type code (R_RELC | |
7800 | external / BFD_RELOC_RELC internal) and an encoding of relocation field | |
7801 | information (start bit, end bit, word width, etc) into the addend. This | |
7802 | information is extracted from CGEN-generated operand tables within gas. | |
7803 | ||
7804 | Complex symbols are mangled symbols (BSF_RELC external / STT_RELC | |
7805 | internal) representing prefix-notation expressions, including but not | |
7806 | limited to those sorts of expressions normally encoded as addends in the | |
7807 | addend field. The symbol mangling format is: | |
7808 | ||
7809 | <node> := <literal> | |
7810 | | <unary-operator> ':' <node> | |
7811 | | <binary-operator> ':' <node> ':' <node> | |
7812 | ; | |
7813 | ||
7814 | <literal> := 's' <digits=N> ':' <N character symbol name> | |
7815 | | 'S' <digits=N> ':' <N character section name> | |
7816 | | '#' <hexdigits> | |
7817 | ; | |
7818 | ||
7819 | <binary-operator> := as in C | |
7820 | <unary-operator> := as in C, plus "0-" for unambiguous negation. */ | |
7821 | ||
7822 | static void | |
a0c8462f AM |
7823 | set_symbol_value (bfd *bfd_with_globals, |
7824 | Elf_Internal_Sym *isymbuf, | |
7825 | size_t locsymcount, | |
7826 | size_t symidx, | |
7827 | bfd_vma val) | |
d9352518 | 7828 | { |
8977835c AM |
7829 | struct elf_link_hash_entry **sym_hashes; |
7830 | struct elf_link_hash_entry *h; | |
7831 | size_t extsymoff = locsymcount; | |
d9352518 | 7832 | |
8977835c | 7833 | if (symidx < locsymcount) |
d9352518 | 7834 | { |
8977835c AM |
7835 | Elf_Internal_Sym *sym; |
7836 | ||
7837 | sym = isymbuf + symidx; | |
7838 | if (ELF_ST_BIND (sym->st_info) == STB_LOCAL) | |
7839 | { | |
7840 | /* It is a local symbol: move it to the | |
7841 | "absolute" section and give it a value. */ | |
7842 | sym->st_shndx = SHN_ABS; | |
7843 | sym->st_value = val; | |
7844 | return; | |
7845 | } | |
7846 | BFD_ASSERT (elf_bad_symtab (bfd_with_globals)); | |
7847 | extsymoff = 0; | |
d9352518 | 7848 | } |
8977835c AM |
7849 | |
7850 | /* It is a global symbol: set its link type | |
7851 | to "defined" and give it a value. */ | |
7852 | ||
7853 | sym_hashes = elf_sym_hashes (bfd_with_globals); | |
7854 | h = sym_hashes [symidx - extsymoff]; | |
7855 | while (h->root.type == bfd_link_hash_indirect | |
7856 | || h->root.type == bfd_link_hash_warning) | |
7857 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7858 | h->root.type = bfd_link_hash_defined; | |
7859 | h->root.u.def.value = val; | |
7860 | h->root.u.def.section = bfd_abs_section_ptr; | |
d9352518 DB |
7861 | } |
7862 | ||
a0c8462f AM |
7863 | static bfd_boolean |
7864 | resolve_symbol (const char *name, | |
7865 | bfd *input_bfd, | |
8b127cbc | 7866 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
7867 | bfd_vma *result, |
7868 | Elf_Internal_Sym *isymbuf, | |
7869 | size_t locsymcount) | |
d9352518 | 7870 | { |
a0c8462f AM |
7871 | Elf_Internal_Sym *sym; |
7872 | struct bfd_link_hash_entry *global_entry; | |
7873 | const char *candidate = NULL; | |
7874 | Elf_Internal_Shdr *symtab_hdr; | |
7875 | size_t i; | |
7876 | ||
d9352518 DB |
7877 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
7878 | ||
7879 | for (i = 0; i < locsymcount; ++ i) | |
7880 | { | |
8977835c | 7881 | sym = isymbuf + i; |
d9352518 DB |
7882 | |
7883 | if (ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
7884 | continue; | |
7885 | ||
7886 | candidate = bfd_elf_string_from_elf_section (input_bfd, | |
7887 | symtab_hdr->sh_link, | |
7888 | sym->st_name); | |
7889 | #ifdef DEBUG | |
0f02bbd9 AM |
7890 | printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n", |
7891 | name, candidate, (unsigned long) sym->st_value); | |
d9352518 DB |
7892 | #endif |
7893 | if (candidate && strcmp (candidate, name) == 0) | |
7894 | { | |
8b127cbc | 7895 | asection *sec = flinfo->sections [i]; |
d9352518 | 7896 | |
0f02bbd9 AM |
7897 | *result = _bfd_elf_rel_local_sym (input_bfd, sym, &sec, 0); |
7898 | *result += sec->output_offset + sec->output_section->vma; | |
d9352518 | 7899 | #ifdef DEBUG |
0f02bbd9 AM |
7900 | printf ("Found symbol with value %8.8lx\n", |
7901 | (unsigned long) *result); | |
d9352518 DB |
7902 | #endif |
7903 | return TRUE; | |
7904 | } | |
7905 | } | |
7906 | ||
7907 | /* Hmm, haven't found it yet. perhaps it is a global. */ | |
8b127cbc | 7908 | global_entry = bfd_link_hash_lookup (flinfo->info->hash, name, |
a0c8462f | 7909 | FALSE, FALSE, TRUE); |
d9352518 DB |
7910 | if (!global_entry) |
7911 | return FALSE; | |
a0c8462f | 7912 | |
d9352518 DB |
7913 | if (global_entry->type == bfd_link_hash_defined |
7914 | || global_entry->type == bfd_link_hash_defweak) | |
7915 | { | |
a0c8462f AM |
7916 | *result = (global_entry->u.def.value |
7917 | + global_entry->u.def.section->output_section->vma | |
7918 | + global_entry->u.def.section->output_offset); | |
d9352518 | 7919 | #ifdef DEBUG |
0f02bbd9 AM |
7920 | printf ("Found GLOBAL symbol '%s' with value %8.8lx\n", |
7921 | global_entry->root.string, (unsigned long) *result); | |
d9352518 DB |
7922 | #endif |
7923 | return TRUE; | |
a0c8462f | 7924 | } |
d9352518 | 7925 | |
d9352518 DB |
7926 | return FALSE; |
7927 | } | |
7928 | ||
37b01f6a DG |
7929 | /* Looks up NAME in SECTIONS. If found sets RESULT to NAME's address (in |
7930 | bytes) and returns TRUE, otherwise returns FALSE. Accepts pseudo-section | |
7931 | names like "foo.end" which is the end address of section "foo". */ | |
7932 | ||
d9352518 | 7933 | static bfd_boolean |
a0c8462f AM |
7934 | resolve_section (const char *name, |
7935 | asection *sections, | |
37b01f6a DG |
7936 | bfd_vma *result, |
7937 | bfd * abfd) | |
d9352518 | 7938 | { |
a0c8462f AM |
7939 | asection *curr; |
7940 | unsigned int len; | |
d9352518 | 7941 | |
a0c8462f | 7942 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
7943 | if (strcmp (curr->name, name) == 0) |
7944 | { | |
7945 | *result = curr->vma; | |
7946 | return TRUE; | |
7947 | } | |
7948 | ||
7949 | /* Hmm. still haven't found it. try pseudo-section names. */ | |
37b01f6a | 7950 | /* FIXME: This could be coded more efficiently... */ |
a0c8462f | 7951 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
7952 | { |
7953 | len = strlen (curr->name); | |
a0c8462f | 7954 | if (len > strlen (name)) |
d9352518 DB |
7955 | continue; |
7956 | ||
7957 | if (strncmp (curr->name, name, len) == 0) | |
7958 | { | |
7959 | if (strncmp (".end", name + len, 4) == 0) | |
7960 | { | |
37b01f6a | 7961 | *result = curr->vma + curr->size / bfd_octets_per_byte (abfd); |
d9352518 DB |
7962 | return TRUE; |
7963 | } | |
7964 | ||
7965 | /* Insert more pseudo-section names here, if you like. */ | |
7966 | } | |
7967 | } | |
a0c8462f | 7968 | |
d9352518 DB |
7969 | return FALSE; |
7970 | } | |
7971 | ||
7972 | static void | |
a0c8462f | 7973 | undefined_reference (const char *reftype, const char *name) |
d9352518 | 7974 | { |
695344c0 | 7975 | /* xgettext:c-format */ |
a0c8462f AM |
7976 | _bfd_error_handler (_("undefined %s reference in complex symbol: %s"), |
7977 | reftype, name); | |
d9352518 DB |
7978 | } |
7979 | ||
7980 | static bfd_boolean | |
a0c8462f AM |
7981 | eval_symbol (bfd_vma *result, |
7982 | const char **symp, | |
7983 | bfd *input_bfd, | |
8b127cbc | 7984 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
7985 | bfd_vma dot, |
7986 | Elf_Internal_Sym *isymbuf, | |
7987 | size_t locsymcount, | |
7988 | int signed_p) | |
d9352518 | 7989 | { |
4b93929b NC |
7990 | size_t len; |
7991 | size_t symlen; | |
a0c8462f AM |
7992 | bfd_vma a; |
7993 | bfd_vma b; | |
4b93929b | 7994 | char symbuf[4096]; |
0f02bbd9 | 7995 | const char *sym = *symp; |
a0c8462f AM |
7996 | const char *symend; |
7997 | bfd_boolean symbol_is_section = FALSE; | |
d9352518 DB |
7998 | |
7999 | len = strlen (sym); | |
8000 | symend = sym + len; | |
8001 | ||
4b93929b | 8002 | if (len < 1 || len > sizeof (symbuf)) |
d9352518 DB |
8003 | { |
8004 | bfd_set_error (bfd_error_invalid_operation); | |
8005 | return FALSE; | |
8006 | } | |
a0c8462f | 8007 | |
d9352518 DB |
8008 | switch (* sym) |
8009 | { | |
8010 | case '.': | |
0f02bbd9 AM |
8011 | *result = dot; |
8012 | *symp = sym + 1; | |
d9352518 DB |
8013 | return TRUE; |
8014 | ||
8015 | case '#': | |
0f02bbd9 AM |
8016 | ++sym; |
8017 | *result = strtoul (sym, (char **) symp, 16); | |
d9352518 DB |
8018 | return TRUE; |
8019 | ||
8020 | case 'S': | |
8021 | symbol_is_section = TRUE; | |
1a0670f3 | 8022 | /* Fall through. */ |
a0c8462f | 8023 | case 's': |
0f02bbd9 AM |
8024 | ++sym; |
8025 | symlen = strtol (sym, (char **) symp, 10); | |
8026 | sym = *symp + 1; /* Skip the trailing ':'. */ | |
d9352518 | 8027 | |
4b93929b | 8028 | if (symend < sym || symlen + 1 > sizeof (symbuf)) |
d9352518 DB |
8029 | { |
8030 | bfd_set_error (bfd_error_invalid_operation); | |
8031 | return FALSE; | |
8032 | } | |
8033 | ||
8034 | memcpy (symbuf, sym, symlen); | |
a0c8462f | 8035 | symbuf[symlen] = '\0'; |
0f02bbd9 | 8036 | *symp = sym + symlen; |
a0c8462f AM |
8037 | |
8038 | /* Is it always possible, with complex symbols, that gas "mis-guessed" | |
d9352518 DB |
8039 | the symbol as a section, or vice-versa. so we're pretty liberal in our |
8040 | interpretation here; section means "try section first", not "must be a | |
8041 | section", and likewise with symbol. */ | |
8042 | ||
a0c8462f | 8043 | if (symbol_is_section) |
d9352518 | 8044 | { |
37b01f6a | 8045 | if (!resolve_section (symbuf, flinfo->output_bfd->sections, result, input_bfd) |
8b127cbc | 8046 | && !resolve_symbol (symbuf, input_bfd, flinfo, result, |
8977835c | 8047 | isymbuf, locsymcount)) |
d9352518 DB |
8048 | { |
8049 | undefined_reference ("section", symbuf); | |
8050 | return FALSE; | |
8051 | } | |
a0c8462f AM |
8052 | } |
8053 | else | |
d9352518 | 8054 | { |
8b127cbc | 8055 | if (!resolve_symbol (symbuf, input_bfd, flinfo, result, |
8977835c | 8056 | isymbuf, locsymcount) |
8b127cbc | 8057 | && !resolve_section (symbuf, flinfo->output_bfd->sections, |
37b01f6a | 8058 | result, input_bfd)) |
d9352518 DB |
8059 | { |
8060 | undefined_reference ("symbol", symbuf); | |
8061 | return FALSE; | |
8062 | } | |
8063 | } | |
8064 | ||
8065 | return TRUE; | |
a0c8462f | 8066 | |
d9352518 DB |
8067 | /* All that remains are operators. */ |
8068 | ||
8069 | #define UNARY_OP(op) \ | |
8070 | if (strncmp (sym, #op, strlen (#op)) == 0) \ | |
8071 | { \ | |
8072 | sym += strlen (#op); \ | |
a0c8462f AM |
8073 | if (*sym == ':') \ |
8074 | ++sym; \ | |
0f02bbd9 | 8075 | *symp = sym; \ |
8b127cbc | 8076 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 8077 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f AM |
8078 | return FALSE; \ |
8079 | if (signed_p) \ | |
0f02bbd9 | 8080 | *result = op ((bfd_signed_vma) a); \ |
a0c8462f AM |
8081 | else \ |
8082 | *result = op a; \ | |
d9352518 DB |
8083 | return TRUE; \ |
8084 | } | |
8085 | ||
8086 | #define BINARY_OP(op) \ | |
8087 | if (strncmp (sym, #op, strlen (#op)) == 0) \ | |
8088 | { \ | |
8089 | sym += strlen (#op); \ | |
a0c8462f AM |
8090 | if (*sym == ':') \ |
8091 | ++sym; \ | |
0f02bbd9 | 8092 | *symp = sym; \ |
8b127cbc | 8093 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 8094 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f | 8095 | return FALSE; \ |
0f02bbd9 | 8096 | ++*symp; \ |
8b127cbc | 8097 | if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 8098 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f AM |
8099 | return FALSE; \ |
8100 | if (signed_p) \ | |
0f02bbd9 | 8101 | *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \ |
a0c8462f AM |
8102 | else \ |
8103 | *result = a op b; \ | |
d9352518 DB |
8104 | return TRUE; \ |
8105 | } | |
8106 | ||
8107 | default: | |
8108 | UNARY_OP (0-); | |
8109 | BINARY_OP (<<); | |
8110 | BINARY_OP (>>); | |
8111 | BINARY_OP (==); | |
8112 | BINARY_OP (!=); | |
8113 | BINARY_OP (<=); | |
8114 | BINARY_OP (>=); | |
8115 | BINARY_OP (&&); | |
8116 | BINARY_OP (||); | |
8117 | UNARY_OP (~); | |
8118 | UNARY_OP (!); | |
8119 | BINARY_OP (*); | |
8120 | BINARY_OP (/); | |
8121 | BINARY_OP (%); | |
8122 | BINARY_OP (^); | |
8123 | BINARY_OP (|); | |
8124 | BINARY_OP (&); | |
8125 | BINARY_OP (+); | |
8126 | BINARY_OP (-); | |
8127 | BINARY_OP (<); | |
8128 | BINARY_OP (>); | |
8129 | #undef UNARY_OP | |
8130 | #undef BINARY_OP | |
8131 | _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym); | |
8132 | bfd_set_error (bfd_error_invalid_operation); | |
8133 | return FALSE; | |
8134 | } | |
8135 | } | |
8136 | ||
d9352518 | 8137 | static void |
a0c8462f AM |
8138 | put_value (bfd_vma size, |
8139 | unsigned long chunksz, | |
8140 | bfd *input_bfd, | |
8141 | bfd_vma x, | |
8142 | bfd_byte *location) | |
d9352518 DB |
8143 | { |
8144 | location += (size - chunksz); | |
8145 | ||
41cd1ad1 | 8146 | for (; size; size -= chunksz, location -= chunksz) |
d9352518 DB |
8147 | { |
8148 | switch (chunksz) | |
8149 | { | |
d9352518 DB |
8150 | case 1: |
8151 | bfd_put_8 (input_bfd, x, location); | |
41cd1ad1 | 8152 | x >>= 8; |
d9352518 DB |
8153 | break; |
8154 | case 2: | |
8155 | bfd_put_16 (input_bfd, x, location); | |
41cd1ad1 | 8156 | x >>= 16; |
d9352518 DB |
8157 | break; |
8158 | case 4: | |
8159 | bfd_put_32 (input_bfd, x, location); | |
65164438 NC |
8160 | /* Computed this way because x >>= 32 is undefined if x is a 32-bit value. */ |
8161 | x >>= 16; | |
8162 | x >>= 16; | |
d9352518 | 8163 | break; |
d9352518 | 8164 | #ifdef BFD64 |
41cd1ad1 | 8165 | case 8: |
d9352518 | 8166 | bfd_put_64 (input_bfd, x, location); |
41cd1ad1 NC |
8167 | /* Computed this way because x >>= 64 is undefined if x is a 64-bit value. */ |
8168 | x >>= 32; | |
8169 | x >>= 32; | |
8170 | break; | |
d9352518 | 8171 | #endif |
41cd1ad1 NC |
8172 | default: |
8173 | abort (); | |
d9352518 DB |
8174 | break; |
8175 | } | |
8176 | } | |
8177 | } | |
8178 | ||
a0c8462f AM |
8179 | static bfd_vma |
8180 | get_value (bfd_vma size, | |
8181 | unsigned long chunksz, | |
8182 | bfd *input_bfd, | |
8183 | bfd_byte *location) | |
d9352518 | 8184 | { |
9b239e0e | 8185 | int shift; |
d9352518 DB |
8186 | bfd_vma x = 0; |
8187 | ||
9b239e0e NC |
8188 | /* Sanity checks. */ |
8189 | BFD_ASSERT (chunksz <= sizeof (x) | |
8190 | && size >= chunksz | |
8191 | && chunksz != 0 | |
8192 | && (size % chunksz) == 0 | |
8193 | && input_bfd != NULL | |
8194 | && location != NULL); | |
8195 | ||
8196 | if (chunksz == sizeof (x)) | |
8197 | { | |
8198 | BFD_ASSERT (size == chunksz); | |
8199 | ||
8200 | /* Make sure that we do not perform an undefined shift operation. | |
8201 | We know that size == chunksz so there will only be one iteration | |
8202 | of the loop below. */ | |
8203 | shift = 0; | |
8204 | } | |
8205 | else | |
8206 | shift = 8 * chunksz; | |
8207 | ||
a0c8462f | 8208 | for (; size; size -= chunksz, location += chunksz) |
d9352518 DB |
8209 | { |
8210 | switch (chunksz) | |
8211 | { | |
d9352518 | 8212 | case 1: |
9b239e0e | 8213 | x = (x << shift) | bfd_get_8 (input_bfd, location); |
d9352518 DB |
8214 | break; |
8215 | case 2: | |
9b239e0e | 8216 | x = (x << shift) | bfd_get_16 (input_bfd, location); |
d9352518 DB |
8217 | break; |
8218 | case 4: | |
9b239e0e | 8219 | x = (x << shift) | bfd_get_32 (input_bfd, location); |
d9352518 | 8220 | break; |
d9352518 | 8221 | #ifdef BFD64 |
9b239e0e NC |
8222 | case 8: |
8223 | x = (x << shift) | bfd_get_64 (input_bfd, location); | |
d9352518 | 8224 | break; |
9b239e0e NC |
8225 | #endif |
8226 | default: | |
8227 | abort (); | |
d9352518 DB |
8228 | } |
8229 | } | |
8230 | return x; | |
8231 | } | |
8232 | ||
a0c8462f AM |
8233 | static void |
8234 | decode_complex_addend (unsigned long *start, /* in bits */ | |
8235 | unsigned long *oplen, /* in bits */ | |
8236 | unsigned long *len, /* in bits */ | |
8237 | unsigned long *wordsz, /* in bytes */ | |
8238 | unsigned long *chunksz, /* in bytes */ | |
8239 | unsigned long *lsb0_p, | |
8240 | unsigned long *signed_p, | |
8241 | unsigned long *trunc_p, | |
8242 | unsigned long encoded) | |
d9352518 DB |
8243 | { |
8244 | * start = encoded & 0x3F; | |
8245 | * len = (encoded >> 6) & 0x3F; | |
8246 | * oplen = (encoded >> 12) & 0x3F; | |
8247 | * wordsz = (encoded >> 18) & 0xF; | |
8248 | * chunksz = (encoded >> 22) & 0xF; | |
8249 | * lsb0_p = (encoded >> 27) & 1; | |
8250 | * signed_p = (encoded >> 28) & 1; | |
8251 | * trunc_p = (encoded >> 29) & 1; | |
8252 | } | |
8253 | ||
cdfeee4f | 8254 | bfd_reloc_status_type |
0f02bbd9 | 8255 | bfd_elf_perform_complex_relocation (bfd *input_bfd, |
cdfeee4f | 8256 | asection *input_section ATTRIBUTE_UNUSED, |
0f02bbd9 AM |
8257 | bfd_byte *contents, |
8258 | Elf_Internal_Rela *rel, | |
8259 | bfd_vma relocation) | |
d9352518 | 8260 | { |
0f02bbd9 AM |
8261 | bfd_vma shift, x, mask; |
8262 | unsigned long start, oplen, len, wordsz, chunksz, lsb0_p, signed_p, trunc_p; | |
cdfeee4f | 8263 | bfd_reloc_status_type r; |
d9352518 DB |
8264 | |
8265 | /* Perform this reloc, since it is complex. | |
8266 | (this is not to say that it necessarily refers to a complex | |
8267 | symbol; merely that it is a self-describing CGEN based reloc. | |
8268 | i.e. the addend has the complete reloc information (bit start, end, | |
a0c8462f | 8269 | word size, etc) encoded within it.). */ |
d9352518 | 8270 | |
a0c8462f AM |
8271 | decode_complex_addend (&start, &oplen, &len, &wordsz, |
8272 | &chunksz, &lsb0_p, &signed_p, | |
8273 | &trunc_p, rel->r_addend); | |
d9352518 DB |
8274 | |
8275 | mask = (((1L << (len - 1)) - 1) << 1) | 1; | |
8276 | ||
8277 | if (lsb0_p) | |
8278 | shift = (start + 1) - len; | |
8279 | else | |
8280 | shift = (8 * wordsz) - (start + len); | |
8281 | ||
37b01f6a DG |
8282 | x = get_value (wordsz, chunksz, input_bfd, |
8283 | contents + rel->r_offset * bfd_octets_per_byte (input_bfd)); | |
d9352518 DB |
8284 | |
8285 | #ifdef DEBUG | |
8286 | printf ("Doing complex reloc: " | |
8287 | "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, " | |
8288 | "chunksz %ld, start %ld, len %ld, oplen %ld\n" | |
8289 | " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n", | |
8290 | lsb0_p, signed_p, trunc_p, wordsz, chunksz, start, len, | |
9ccb8af9 AM |
8291 | oplen, (unsigned long) x, (unsigned long) mask, |
8292 | (unsigned long) relocation); | |
d9352518 DB |
8293 | #endif |
8294 | ||
cdfeee4f | 8295 | r = bfd_reloc_ok; |
d9352518 | 8296 | if (! trunc_p) |
cdfeee4f AM |
8297 | /* Now do an overflow check. */ |
8298 | r = bfd_check_overflow ((signed_p | |
8299 | ? complain_overflow_signed | |
8300 | : complain_overflow_unsigned), | |
8301 | len, 0, (8 * wordsz), | |
8302 | relocation); | |
a0c8462f | 8303 | |
d9352518 DB |
8304 | /* Do the deed. */ |
8305 | x = (x & ~(mask << shift)) | ((relocation & mask) << shift); | |
8306 | ||
8307 | #ifdef DEBUG | |
8308 | printf (" relocation: %8.8lx\n" | |
8309 | " shifted mask: %8.8lx\n" | |
8310 | " shifted/masked reloc: %8.8lx\n" | |
8311 | " result: %8.8lx\n", | |
9ccb8af9 AM |
8312 | (unsigned long) relocation, (unsigned long) (mask << shift), |
8313 | (unsigned long) ((relocation & mask) << shift), (unsigned long) x); | |
d9352518 | 8314 | #endif |
37b01f6a DG |
8315 | put_value (wordsz, chunksz, input_bfd, x, |
8316 | contents + rel->r_offset * bfd_octets_per_byte (input_bfd)); | |
cdfeee4f | 8317 | return r; |
d9352518 DB |
8318 | } |
8319 | ||
0e287786 AM |
8320 | /* Functions to read r_offset from external (target order) reloc |
8321 | entry. Faster than bfd_getl32 et al, because we let the compiler | |
8322 | know the value is aligned. */ | |
53df40a4 | 8323 | |
0e287786 AM |
8324 | static bfd_vma |
8325 | ext32l_r_offset (const void *p) | |
53df40a4 AM |
8326 | { |
8327 | union aligned32 | |
8328 | { | |
8329 | uint32_t v; | |
8330 | unsigned char c[4]; | |
8331 | }; | |
8332 | const union aligned32 *a | |
0e287786 | 8333 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
8334 | |
8335 | uint32_t aval = ( (uint32_t) a->c[0] | |
8336 | | (uint32_t) a->c[1] << 8 | |
8337 | | (uint32_t) a->c[2] << 16 | |
8338 | | (uint32_t) a->c[3] << 24); | |
0e287786 | 8339 | return aval; |
53df40a4 AM |
8340 | } |
8341 | ||
0e287786 AM |
8342 | static bfd_vma |
8343 | ext32b_r_offset (const void *p) | |
53df40a4 AM |
8344 | { |
8345 | union aligned32 | |
8346 | { | |
8347 | uint32_t v; | |
8348 | unsigned char c[4]; | |
8349 | }; | |
8350 | const union aligned32 *a | |
0e287786 | 8351 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
8352 | |
8353 | uint32_t aval = ( (uint32_t) a->c[0] << 24 | |
8354 | | (uint32_t) a->c[1] << 16 | |
8355 | | (uint32_t) a->c[2] << 8 | |
8356 | | (uint32_t) a->c[3]); | |
0e287786 | 8357 | return aval; |
53df40a4 AM |
8358 | } |
8359 | ||
8360 | #ifdef BFD_HOST_64_BIT | |
0e287786 AM |
8361 | static bfd_vma |
8362 | ext64l_r_offset (const void *p) | |
53df40a4 AM |
8363 | { |
8364 | union aligned64 | |
8365 | { | |
8366 | uint64_t v; | |
8367 | unsigned char c[8]; | |
8368 | }; | |
8369 | const union aligned64 *a | |
0e287786 | 8370 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
8371 | |
8372 | uint64_t aval = ( (uint64_t) a->c[0] | |
8373 | | (uint64_t) a->c[1] << 8 | |
8374 | | (uint64_t) a->c[2] << 16 | |
8375 | | (uint64_t) a->c[3] << 24 | |
8376 | | (uint64_t) a->c[4] << 32 | |
8377 | | (uint64_t) a->c[5] << 40 | |
8378 | | (uint64_t) a->c[6] << 48 | |
8379 | | (uint64_t) a->c[7] << 56); | |
0e287786 | 8380 | return aval; |
53df40a4 AM |
8381 | } |
8382 | ||
0e287786 AM |
8383 | static bfd_vma |
8384 | ext64b_r_offset (const void *p) | |
53df40a4 AM |
8385 | { |
8386 | union aligned64 | |
8387 | { | |
8388 | uint64_t v; | |
8389 | unsigned char c[8]; | |
8390 | }; | |
8391 | const union aligned64 *a | |
0e287786 | 8392 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
8393 | |
8394 | uint64_t aval = ( (uint64_t) a->c[0] << 56 | |
8395 | | (uint64_t) a->c[1] << 48 | |
8396 | | (uint64_t) a->c[2] << 40 | |
8397 | | (uint64_t) a->c[3] << 32 | |
8398 | | (uint64_t) a->c[4] << 24 | |
8399 | | (uint64_t) a->c[5] << 16 | |
8400 | | (uint64_t) a->c[6] << 8 | |
8401 | | (uint64_t) a->c[7]); | |
0e287786 | 8402 | return aval; |
53df40a4 AM |
8403 | } |
8404 | #endif | |
8405 | ||
c152c796 AM |
8406 | /* When performing a relocatable link, the input relocations are |
8407 | preserved. But, if they reference global symbols, the indices | |
d4730f92 BS |
8408 | referenced must be updated. Update all the relocations found in |
8409 | RELDATA. */ | |
c152c796 | 8410 | |
bca6d0e3 | 8411 | static bfd_boolean |
c152c796 | 8412 | elf_link_adjust_relocs (bfd *abfd, |
9eaff861 | 8413 | asection *sec, |
28dbcedc AM |
8414 | struct bfd_elf_section_reloc_data *reldata, |
8415 | bfd_boolean sort) | |
c152c796 AM |
8416 | { |
8417 | unsigned int i; | |
8418 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8419 | bfd_byte *erela; | |
8420 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); | |
8421 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
8422 | bfd_vma r_type_mask; | |
8423 | int r_sym_shift; | |
d4730f92 BS |
8424 | unsigned int count = reldata->count; |
8425 | struct elf_link_hash_entry **rel_hash = reldata->hashes; | |
c152c796 | 8426 | |
d4730f92 | 8427 | if (reldata->hdr->sh_entsize == bed->s->sizeof_rel) |
c152c796 AM |
8428 | { |
8429 | swap_in = bed->s->swap_reloc_in; | |
8430 | swap_out = bed->s->swap_reloc_out; | |
8431 | } | |
d4730f92 | 8432 | else if (reldata->hdr->sh_entsize == bed->s->sizeof_rela) |
c152c796 AM |
8433 | { |
8434 | swap_in = bed->s->swap_reloca_in; | |
8435 | swap_out = bed->s->swap_reloca_out; | |
8436 | } | |
8437 | else | |
8438 | abort (); | |
8439 | ||
8440 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
8441 | abort (); | |
8442 | ||
8443 | if (bed->s->arch_size == 32) | |
8444 | { | |
8445 | r_type_mask = 0xff; | |
8446 | r_sym_shift = 8; | |
8447 | } | |
8448 | else | |
8449 | { | |
8450 | r_type_mask = 0xffffffff; | |
8451 | r_sym_shift = 32; | |
8452 | } | |
8453 | ||
d4730f92 BS |
8454 | erela = reldata->hdr->contents; |
8455 | for (i = 0; i < count; i++, rel_hash++, erela += reldata->hdr->sh_entsize) | |
c152c796 AM |
8456 | { |
8457 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; | |
8458 | unsigned int j; | |
8459 | ||
8460 | if (*rel_hash == NULL) | |
8461 | continue; | |
8462 | ||
8463 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
8464 | ||
8465 | (*swap_in) (abfd, erela, irela); | |
8466 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
8467 | irela[j].r_info = ((bfd_vma) (*rel_hash)->indx << r_sym_shift | |
8468 | | (irela[j].r_info & r_type_mask)); | |
8469 | (*swap_out) (abfd, irela, erela); | |
8470 | } | |
53df40a4 | 8471 | |
9eaff861 AO |
8472 | if (bed->elf_backend_update_relocs) |
8473 | (*bed->elf_backend_update_relocs) (sec, reldata); | |
8474 | ||
0e287786 | 8475 | if (sort && count != 0) |
53df40a4 | 8476 | { |
0e287786 AM |
8477 | bfd_vma (*ext_r_off) (const void *); |
8478 | bfd_vma r_off; | |
8479 | size_t elt_size; | |
8480 | bfd_byte *base, *end, *p, *loc; | |
bca6d0e3 | 8481 | bfd_byte *buf = NULL; |
28dbcedc AM |
8482 | |
8483 | if (bed->s->arch_size == 32) | |
8484 | { | |
8485 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) | |
0e287786 | 8486 | ext_r_off = ext32l_r_offset; |
28dbcedc | 8487 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 8488 | ext_r_off = ext32b_r_offset; |
28dbcedc AM |
8489 | else |
8490 | abort (); | |
8491 | } | |
53df40a4 | 8492 | else |
28dbcedc | 8493 | { |
53df40a4 | 8494 | #ifdef BFD_HOST_64_BIT |
28dbcedc | 8495 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) |
0e287786 | 8496 | ext_r_off = ext64l_r_offset; |
28dbcedc | 8497 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 8498 | ext_r_off = ext64b_r_offset; |
28dbcedc | 8499 | else |
53df40a4 | 8500 | #endif |
28dbcedc AM |
8501 | abort (); |
8502 | } | |
0e287786 | 8503 | |
bca6d0e3 AM |
8504 | /* Must use a stable sort here. A modified insertion sort, |
8505 | since the relocs are mostly sorted already. */ | |
0e287786 AM |
8506 | elt_size = reldata->hdr->sh_entsize; |
8507 | base = reldata->hdr->contents; | |
8508 | end = base + count * elt_size; | |
bca6d0e3 | 8509 | if (elt_size > sizeof (Elf64_External_Rela)) |
0e287786 AM |
8510 | abort (); |
8511 | ||
8512 | /* Ensure the first element is lowest. This acts as a sentinel, | |
8513 | speeding the main loop below. */ | |
8514 | r_off = (*ext_r_off) (base); | |
8515 | for (p = loc = base; (p += elt_size) < end; ) | |
8516 | { | |
8517 | bfd_vma r_off2 = (*ext_r_off) (p); | |
8518 | if (r_off > r_off2) | |
8519 | { | |
8520 | r_off = r_off2; | |
8521 | loc = p; | |
8522 | } | |
8523 | } | |
8524 | if (loc != base) | |
8525 | { | |
8526 | /* Don't just swap *base and *loc as that changes the order | |
8527 | of the original base[0] and base[1] if they happen to | |
8528 | have the same r_offset. */ | |
bca6d0e3 AM |
8529 | bfd_byte onebuf[sizeof (Elf64_External_Rela)]; |
8530 | memcpy (onebuf, loc, elt_size); | |
0e287786 | 8531 | memmove (base + elt_size, base, loc - base); |
bca6d0e3 | 8532 | memcpy (base, onebuf, elt_size); |
0e287786 AM |
8533 | } |
8534 | ||
b29b8669 | 8535 | for (p = base + elt_size; (p += elt_size) < end; ) |
0e287786 AM |
8536 | { |
8537 | /* base to p is sorted, *p is next to insert. */ | |
8538 | r_off = (*ext_r_off) (p); | |
8539 | /* Search the sorted region for location to insert. */ | |
8540 | loc = p - elt_size; | |
8541 | while (r_off < (*ext_r_off) (loc)) | |
8542 | loc -= elt_size; | |
8543 | loc += elt_size; | |
8544 | if (loc != p) | |
8545 | { | |
bca6d0e3 AM |
8546 | /* Chances are there is a run of relocs to insert here, |
8547 | from one of more input files. Files are not always | |
8548 | linked in order due to the way elf_link_input_bfd is | |
8549 | called. See pr17666. */ | |
8550 | size_t sortlen = p - loc; | |
8551 | bfd_vma r_off2 = (*ext_r_off) (loc); | |
8552 | size_t runlen = elt_size; | |
8553 | size_t buf_size = 96 * 1024; | |
8554 | while (p + runlen < end | |
8555 | && (sortlen <= buf_size | |
8556 | || runlen + elt_size <= buf_size) | |
8557 | && r_off2 > (*ext_r_off) (p + runlen)) | |
8558 | runlen += elt_size; | |
8559 | if (buf == NULL) | |
8560 | { | |
8561 | buf = bfd_malloc (buf_size); | |
8562 | if (buf == NULL) | |
8563 | return FALSE; | |
8564 | } | |
8565 | if (runlen < sortlen) | |
8566 | { | |
8567 | memcpy (buf, p, runlen); | |
8568 | memmove (loc + runlen, loc, sortlen); | |
8569 | memcpy (loc, buf, runlen); | |
8570 | } | |
8571 | else | |
8572 | { | |
8573 | memcpy (buf, loc, sortlen); | |
8574 | memmove (loc, p, runlen); | |
8575 | memcpy (loc + runlen, buf, sortlen); | |
8576 | } | |
b29b8669 | 8577 | p += runlen - elt_size; |
0e287786 AM |
8578 | } |
8579 | } | |
8580 | /* Hashes are no longer valid. */ | |
28dbcedc AM |
8581 | free (reldata->hashes); |
8582 | reldata->hashes = NULL; | |
bca6d0e3 | 8583 | free (buf); |
53df40a4 | 8584 | } |
bca6d0e3 | 8585 | return TRUE; |
c152c796 AM |
8586 | } |
8587 | ||
8588 | struct elf_link_sort_rela | |
8589 | { | |
8590 | union { | |
8591 | bfd_vma offset; | |
8592 | bfd_vma sym_mask; | |
8593 | } u; | |
8594 | enum elf_reloc_type_class type; | |
8595 | /* We use this as an array of size int_rels_per_ext_rel. */ | |
8596 | Elf_Internal_Rela rela[1]; | |
8597 | }; | |
8598 | ||
8599 | static int | |
8600 | elf_link_sort_cmp1 (const void *A, const void *B) | |
8601 | { | |
a50b1753 NC |
8602 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
8603 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 AM |
8604 | int relativea, relativeb; |
8605 | ||
8606 | relativea = a->type == reloc_class_relative; | |
8607 | relativeb = b->type == reloc_class_relative; | |
8608 | ||
8609 | if (relativea < relativeb) | |
8610 | return 1; | |
8611 | if (relativea > relativeb) | |
8612 | return -1; | |
8613 | if ((a->rela->r_info & a->u.sym_mask) < (b->rela->r_info & b->u.sym_mask)) | |
8614 | return -1; | |
8615 | if ((a->rela->r_info & a->u.sym_mask) > (b->rela->r_info & b->u.sym_mask)) | |
8616 | return 1; | |
8617 | if (a->rela->r_offset < b->rela->r_offset) | |
8618 | return -1; | |
8619 | if (a->rela->r_offset > b->rela->r_offset) | |
8620 | return 1; | |
8621 | return 0; | |
8622 | } | |
8623 | ||
8624 | static int | |
8625 | elf_link_sort_cmp2 (const void *A, const void *B) | |
8626 | { | |
a50b1753 NC |
8627 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
8628 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 | 8629 | |
7e612e98 | 8630 | if (a->type < b->type) |
c152c796 | 8631 | return -1; |
7e612e98 | 8632 | if (a->type > b->type) |
c152c796 | 8633 | return 1; |
7e612e98 | 8634 | if (a->u.offset < b->u.offset) |
c152c796 | 8635 | return -1; |
7e612e98 | 8636 | if (a->u.offset > b->u.offset) |
c152c796 AM |
8637 | return 1; |
8638 | if (a->rela->r_offset < b->rela->r_offset) | |
8639 | return -1; | |
8640 | if (a->rela->r_offset > b->rela->r_offset) | |
8641 | return 1; | |
8642 | return 0; | |
8643 | } | |
8644 | ||
8645 | static size_t | |
8646 | elf_link_sort_relocs (bfd *abfd, struct bfd_link_info *info, asection **psec) | |
8647 | { | |
3410fea8 | 8648 | asection *dynamic_relocs; |
fc66a176 L |
8649 | asection *rela_dyn; |
8650 | asection *rel_dyn; | |
c152c796 AM |
8651 | bfd_size_type count, size; |
8652 | size_t i, ret, sort_elt, ext_size; | |
8653 | bfd_byte *sort, *s_non_relative, *p; | |
8654 | struct elf_link_sort_rela *sq; | |
8655 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8656 | int i2e = bed->s->int_rels_per_ext_rel; | |
c8e44c6d | 8657 | unsigned int opb = bfd_octets_per_byte (abfd); |
c152c796 AM |
8658 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
8659 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
8660 | struct bfd_link_order *lo; | |
8661 | bfd_vma r_sym_mask; | |
3410fea8 | 8662 | bfd_boolean use_rela; |
c152c796 | 8663 | |
3410fea8 NC |
8664 | /* Find a dynamic reloc section. */ |
8665 | rela_dyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
8666 | rel_dyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
8667 | if (rela_dyn != NULL && rela_dyn->size > 0 | |
8668 | && rel_dyn != NULL && rel_dyn->size > 0) | |
c152c796 | 8669 | { |
3410fea8 NC |
8670 | bfd_boolean use_rela_initialised = FALSE; |
8671 | ||
8672 | /* This is just here to stop gcc from complaining. | |
c8e44c6d | 8673 | Its initialization checking code is not perfect. */ |
3410fea8 NC |
8674 | use_rela = TRUE; |
8675 | ||
8676 | /* Both sections are present. Examine the sizes | |
8677 | of the indirect sections to help us choose. */ | |
8678 | for (lo = rela_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
8679 | if (lo->type == bfd_indirect_link_order) | |
8680 | { | |
8681 | asection *o = lo->u.indirect.section; | |
8682 | ||
8683 | if ((o->size % bed->s->sizeof_rela) == 0) | |
8684 | { | |
8685 | if ((o->size % bed->s->sizeof_rel) == 0) | |
8686 | /* Section size is divisible by both rel and rela sizes. | |
8687 | It is of no help to us. */ | |
8688 | ; | |
8689 | else | |
8690 | { | |
8691 | /* Section size is only divisible by rela. */ | |
8692 | if (use_rela_initialised && (use_rela == FALSE)) | |
8693 | { | |
c8e44c6d AM |
8694 | _bfd_error_handler (_("%B: Unable to sort relocs - " |
8695 | "they are in more than one size"), | |
8696 | abfd); | |
3410fea8 NC |
8697 | bfd_set_error (bfd_error_invalid_operation); |
8698 | return 0; | |
8699 | } | |
8700 | else | |
8701 | { | |
8702 | use_rela = TRUE; | |
8703 | use_rela_initialised = TRUE; | |
8704 | } | |
8705 | } | |
8706 | } | |
8707 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
8708 | { | |
8709 | /* Section size is only divisible by rel. */ | |
8710 | if (use_rela_initialised && (use_rela == TRUE)) | |
8711 | { | |
c8e44c6d AM |
8712 | _bfd_error_handler (_("%B: Unable to sort relocs - " |
8713 | "they are in more than one size"), | |
8714 | abfd); | |
3410fea8 NC |
8715 | bfd_set_error (bfd_error_invalid_operation); |
8716 | return 0; | |
8717 | } | |
8718 | else | |
8719 | { | |
8720 | use_rela = FALSE; | |
8721 | use_rela_initialised = TRUE; | |
8722 | } | |
8723 | } | |
8724 | else | |
8725 | { | |
c8e44c6d AM |
8726 | /* The section size is not divisible by either - |
8727 | something is wrong. */ | |
8728 | _bfd_error_handler (_("%B: Unable to sort relocs - " | |
8729 | "they are of an unknown size"), abfd); | |
3410fea8 NC |
8730 | bfd_set_error (bfd_error_invalid_operation); |
8731 | return 0; | |
8732 | } | |
8733 | } | |
8734 | ||
8735 | for (lo = rel_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
8736 | if (lo->type == bfd_indirect_link_order) | |
8737 | { | |
8738 | asection *o = lo->u.indirect.section; | |
8739 | ||
8740 | if ((o->size % bed->s->sizeof_rela) == 0) | |
8741 | { | |
8742 | if ((o->size % bed->s->sizeof_rel) == 0) | |
8743 | /* Section size is divisible by both rel and rela sizes. | |
8744 | It is of no help to us. */ | |
8745 | ; | |
8746 | else | |
8747 | { | |
8748 | /* Section size is only divisible by rela. */ | |
8749 | if (use_rela_initialised && (use_rela == FALSE)) | |
8750 | { | |
c8e44c6d AM |
8751 | _bfd_error_handler (_("%B: Unable to sort relocs - " |
8752 | "they are in more than one size"), | |
8753 | abfd); | |
3410fea8 NC |
8754 | bfd_set_error (bfd_error_invalid_operation); |
8755 | return 0; | |
8756 | } | |
8757 | else | |
8758 | { | |
8759 | use_rela = TRUE; | |
8760 | use_rela_initialised = TRUE; | |
8761 | } | |
8762 | } | |
8763 | } | |
8764 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
8765 | { | |
8766 | /* Section size is only divisible by rel. */ | |
8767 | if (use_rela_initialised && (use_rela == TRUE)) | |
8768 | { | |
c8e44c6d AM |
8769 | _bfd_error_handler (_("%B: Unable to sort relocs - " |
8770 | "they are in more than one size"), | |
8771 | abfd); | |
3410fea8 NC |
8772 | bfd_set_error (bfd_error_invalid_operation); |
8773 | return 0; | |
8774 | } | |
8775 | else | |
8776 | { | |
8777 | use_rela = FALSE; | |
8778 | use_rela_initialised = TRUE; | |
8779 | } | |
8780 | } | |
8781 | else | |
8782 | { | |
c8e44c6d AM |
8783 | /* The section size is not divisible by either - |
8784 | something is wrong. */ | |
8785 | _bfd_error_handler (_("%B: Unable to sort relocs - " | |
8786 | "they are of an unknown size"), abfd); | |
3410fea8 NC |
8787 | bfd_set_error (bfd_error_invalid_operation); |
8788 | return 0; | |
8789 | } | |
8790 | } | |
8791 | ||
8792 | if (! use_rela_initialised) | |
8793 | /* Make a guess. */ | |
8794 | use_rela = TRUE; | |
c152c796 | 8795 | } |
fc66a176 L |
8796 | else if (rela_dyn != NULL && rela_dyn->size > 0) |
8797 | use_rela = TRUE; | |
8798 | else if (rel_dyn != NULL && rel_dyn->size > 0) | |
3410fea8 | 8799 | use_rela = FALSE; |
c152c796 | 8800 | else |
fc66a176 | 8801 | return 0; |
3410fea8 NC |
8802 | |
8803 | if (use_rela) | |
c152c796 | 8804 | { |
3410fea8 | 8805 | dynamic_relocs = rela_dyn; |
c152c796 AM |
8806 | ext_size = bed->s->sizeof_rela; |
8807 | swap_in = bed->s->swap_reloca_in; | |
8808 | swap_out = bed->s->swap_reloca_out; | |
8809 | } | |
3410fea8 NC |
8810 | else |
8811 | { | |
8812 | dynamic_relocs = rel_dyn; | |
8813 | ext_size = bed->s->sizeof_rel; | |
8814 | swap_in = bed->s->swap_reloc_in; | |
8815 | swap_out = bed->s->swap_reloc_out; | |
8816 | } | |
c152c796 AM |
8817 | |
8818 | size = 0; | |
3410fea8 | 8819 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 | 8820 | if (lo->type == bfd_indirect_link_order) |
3410fea8 | 8821 | size += lo->u.indirect.section->size; |
c152c796 | 8822 | |
3410fea8 | 8823 | if (size != dynamic_relocs->size) |
c152c796 AM |
8824 | return 0; |
8825 | ||
8826 | sort_elt = (sizeof (struct elf_link_sort_rela) | |
8827 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
3410fea8 NC |
8828 | |
8829 | count = dynamic_relocs->size / ext_size; | |
5e486aa1 NC |
8830 | if (count == 0) |
8831 | return 0; | |
a50b1753 | 8832 | sort = (bfd_byte *) bfd_zmalloc (sort_elt * count); |
3410fea8 | 8833 | |
c152c796 AM |
8834 | if (sort == NULL) |
8835 | { | |
8836 | (*info->callbacks->warning) | |
8837 | (info, _("Not enough memory to sort relocations"), 0, abfd, 0, 0); | |
8838 | return 0; | |
8839 | } | |
8840 | ||
8841 | if (bed->s->arch_size == 32) | |
8842 | r_sym_mask = ~(bfd_vma) 0xff; | |
8843 | else | |
8844 | r_sym_mask = ~(bfd_vma) 0xffffffff; | |
8845 | ||
3410fea8 | 8846 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
8847 | if (lo->type == bfd_indirect_link_order) |
8848 | { | |
8849 | bfd_byte *erel, *erelend; | |
8850 | asection *o = lo->u.indirect.section; | |
8851 | ||
1da212d6 AM |
8852 | if (o->contents == NULL && o->size != 0) |
8853 | { | |
8854 | /* This is a reloc section that is being handled as a normal | |
8855 | section. See bfd_section_from_shdr. We can't combine | |
8856 | relocs in this case. */ | |
8857 | free (sort); | |
8858 | return 0; | |
8859 | } | |
c152c796 | 8860 | erel = o->contents; |
eea6121a | 8861 | erelend = o->contents + o->size; |
c8e44c6d | 8862 | p = sort + o->output_offset * opb / ext_size * sort_elt; |
3410fea8 | 8863 | |
c152c796 AM |
8864 | while (erel < erelend) |
8865 | { | |
8866 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
3410fea8 | 8867 | |
c152c796 | 8868 | (*swap_in) (abfd, erel, s->rela); |
7e612e98 | 8869 | s->type = (*bed->elf_backend_reloc_type_class) (info, o, s->rela); |
c152c796 AM |
8870 | s->u.sym_mask = r_sym_mask; |
8871 | p += sort_elt; | |
8872 | erel += ext_size; | |
8873 | } | |
8874 | } | |
8875 | ||
8876 | qsort (sort, count, sort_elt, elf_link_sort_cmp1); | |
8877 | ||
8878 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
8879 | { | |
8880 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
8881 | if (s->type != reloc_class_relative) | |
8882 | break; | |
8883 | } | |
8884 | ret = i; | |
8885 | s_non_relative = p; | |
8886 | ||
8887 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
8888 | for (; i < count; i++, p += sort_elt) | |
8889 | { | |
8890 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
8891 | if (((sp->rela->r_info ^ sq->rela->r_info) & r_sym_mask) != 0) | |
8892 | sq = sp; | |
8893 | sp->u.offset = sq->rela->r_offset; | |
8894 | } | |
8895 | ||
8896 | qsort (s_non_relative, count - ret, sort_elt, elf_link_sort_cmp2); | |
8897 | ||
c8e44c6d AM |
8898 | struct elf_link_hash_table *htab = elf_hash_table (info); |
8899 | if (htab->srelplt && htab->srelplt->output_section == dynamic_relocs) | |
8900 | { | |
8901 | /* We have plt relocs in .rela.dyn. */ | |
8902 | sq = (struct elf_link_sort_rela *) sort; | |
8903 | for (i = 0; i < count; i++) | |
8904 | if (sq[count - i - 1].type != reloc_class_plt) | |
8905 | break; | |
8906 | if (i != 0 && htab->srelplt->size == i * ext_size) | |
8907 | { | |
8908 | struct bfd_link_order **plo; | |
8909 | /* Put srelplt link_order last. This is so the output_offset | |
8910 | set in the next loop is correct for DT_JMPREL. */ | |
8911 | for (plo = &dynamic_relocs->map_head.link_order; *plo != NULL; ) | |
8912 | if ((*plo)->type == bfd_indirect_link_order | |
8913 | && (*plo)->u.indirect.section == htab->srelplt) | |
8914 | { | |
8915 | lo = *plo; | |
8916 | *plo = lo->next; | |
8917 | } | |
8918 | else | |
8919 | plo = &(*plo)->next; | |
8920 | *plo = lo; | |
8921 | lo->next = NULL; | |
8922 | dynamic_relocs->map_tail.link_order = lo; | |
8923 | } | |
8924 | } | |
8925 | ||
8926 | p = sort; | |
3410fea8 | 8927 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
8928 | if (lo->type == bfd_indirect_link_order) |
8929 | { | |
8930 | bfd_byte *erel, *erelend; | |
8931 | asection *o = lo->u.indirect.section; | |
8932 | ||
8933 | erel = o->contents; | |
eea6121a | 8934 | erelend = o->contents + o->size; |
c8e44c6d | 8935 | o->output_offset = (p - sort) / sort_elt * ext_size / opb; |
c152c796 AM |
8936 | while (erel < erelend) |
8937 | { | |
8938 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
8939 | (*swap_out) (abfd, s->rela, erel); | |
8940 | p += sort_elt; | |
8941 | erel += ext_size; | |
8942 | } | |
8943 | } | |
8944 | ||
8945 | free (sort); | |
3410fea8 | 8946 | *psec = dynamic_relocs; |
c152c796 AM |
8947 | return ret; |
8948 | } | |
8949 | ||
ef10c3ac | 8950 | /* Add a symbol to the output symbol string table. */ |
c152c796 | 8951 | |
6e0b88f1 | 8952 | static int |
ef10c3ac L |
8953 | elf_link_output_symstrtab (struct elf_final_link_info *flinfo, |
8954 | const char *name, | |
8955 | Elf_Internal_Sym *elfsym, | |
8956 | asection *input_sec, | |
8957 | struct elf_link_hash_entry *h) | |
c152c796 | 8958 | { |
6e0b88f1 | 8959 | int (*output_symbol_hook) |
c152c796 AM |
8960 | (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *, |
8961 | struct elf_link_hash_entry *); | |
ef10c3ac | 8962 | struct elf_link_hash_table *hash_table; |
c152c796 | 8963 | const struct elf_backend_data *bed; |
ef10c3ac | 8964 | bfd_size_type strtabsize; |
c152c796 | 8965 | |
8539e4e8 AM |
8966 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); |
8967 | ||
8b127cbc | 8968 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 AM |
8969 | output_symbol_hook = bed->elf_backend_link_output_symbol_hook; |
8970 | if (output_symbol_hook != NULL) | |
8971 | { | |
8b127cbc | 8972 | int ret = (*output_symbol_hook) (flinfo->info, name, elfsym, input_sec, h); |
6e0b88f1 AM |
8973 | if (ret != 1) |
8974 | return ret; | |
c152c796 AM |
8975 | } |
8976 | ||
ef10c3ac L |
8977 | if (name == NULL |
8978 | || *name == '\0' | |
8979 | || (input_sec->flags & SEC_EXCLUDE)) | |
8980 | elfsym->st_name = (unsigned long) -1; | |
c152c796 AM |
8981 | else |
8982 | { | |
ef10c3ac L |
8983 | /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize |
8984 | to get the final offset for st_name. */ | |
8985 | elfsym->st_name | |
8986 | = (unsigned long) _bfd_elf_strtab_add (flinfo->symstrtab, | |
8987 | name, FALSE); | |
c152c796 | 8988 | if (elfsym->st_name == (unsigned long) -1) |
6e0b88f1 | 8989 | return 0; |
c152c796 AM |
8990 | } |
8991 | ||
ef10c3ac L |
8992 | hash_table = elf_hash_table (flinfo->info); |
8993 | strtabsize = hash_table->strtabsize; | |
8994 | if (strtabsize <= hash_table->strtabcount) | |
c152c796 | 8995 | { |
ef10c3ac L |
8996 | strtabsize += strtabsize; |
8997 | hash_table->strtabsize = strtabsize; | |
8998 | strtabsize *= sizeof (*hash_table->strtab); | |
8999 | hash_table->strtab | |
9000 | = (struct elf_sym_strtab *) bfd_realloc (hash_table->strtab, | |
9001 | strtabsize); | |
9002 | if (hash_table->strtab == NULL) | |
6e0b88f1 | 9003 | return 0; |
c152c796 | 9004 | } |
ef10c3ac L |
9005 | hash_table->strtab[hash_table->strtabcount].sym = *elfsym; |
9006 | hash_table->strtab[hash_table->strtabcount].dest_index | |
9007 | = hash_table->strtabcount; | |
9008 | hash_table->strtab[hash_table->strtabcount].destshndx_index | |
9009 | = flinfo->symshndxbuf ? bfd_get_symcount (flinfo->output_bfd) : 0; | |
9010 | ||
9011 | bfd_get_symcount (flinfo->output_bfd) += 1; | |
9012 | hash_table->strtabcount += 1; | |
9013 | ||
9014 | return 1; | |
9015 | } | |
9016 | ||
9017 | /* Swap symbols out to the symbol table and flush the output symbols to | |
9018 | the file. */ | |
9019 | ||
9020 | static bfd_boolean | |
9021 | elf_link_swap_symbols_out (struct elf_final_link_info *flinfo) | |
9022 | { | |
9023 | struct elf_link_hash_table *hash_table = elf_hash_table (flinfo->info); | |
ef53be89 AM |
9024 | bfd_size_type amt; |
9025 | size_t i; | |
ef10c3ac L |
9026 | const struct elf_backend_data *bed; |
9027 | bfd_byte *symbuf; | |
9028 | Elf_Internal_Shdr *hdr; | |
9029 | file_ptr pos; | |
9030 | bfd_boolean ret; | |
9031 | ||
9032 | if (!hash_table->strtabcount) | |
9033 | return TRUE; | |
9034 | ||
9035 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); | |
9036 | ||
9037 | bed = get_elf_backend_data (flinfo->output_bfd); | |
c152c796 | 9038 | |
ef10c3ac L |
9039 | amt = bed->s->sizeof_sym * hash_table->strtabcount; |
9040 | symbuf = (bfd_byte *) bfd_malloc (amt); | |
9041 | if (symbuf == NULL) | |
9042 | return FALSE; | |
1b786873 | 9043 | |
ef10c3ac | 9044 | if (flinfo->symshndxbuf) |
c152c796 | 9045 | { |
ef53be89 AM |
9046 | amt = sizeof (Elf_External_Sym_Shndx); |
9047 | amt *= bfd_get_symcount (flinfo->output_bfd); | |
ef10c3ac L |
9048 | flinfo->symshndxbuf = (Elf_External_Sym_Shndx *) bfd_zmalloc (amt); |
9049 | if (flinfo->symshndxbuf == NULL) | |
c152c796 | 9050 | { |
ef10c3ac L |
9051 | free (symbuf); |
9052 | return FALSE; | |
c152c796 | 9053 | } |
c152c796 AM |
9054 | } |
9055 | ||
ef10c3ac L |
9056 | for (i = 0; i < hash_table->strtabcount; i++) |
9057 | { | |
9058 | struct elf_sym_strtab *elfsym = &hash_table->strtab[i]; | |
9059 | if (elfsym->sym.st_name == (unsigned long) -1) | |
9060 | elfsym->sym.st_name = 0; | |
9061 | else | |
9062 | elfsym->sym.st_name | |
9063 | = (unsigned long) _bfd_elf_strtab_offset (flinfo->symstrtab, | |
9064 | elfsym->sym.st_name); | |
9065 | bed->s->swap_symbol_out (flinfo->output_bfd, &elfsym->sym, | |
9066 | ((bfd_byte *) symbuf | |
9067 | + (elfsym->dest_index | |
9068 | * bed->s->sizeof_sym)), | |
9069 | (flinfo->symshndxbuf | |
9070 | + elfsym->destshndx_index)); | |
9071 | } | |
9072 | ||
9073 | hdr = &elf_tdata (flinfo->output_bfd)->symtab_hdr; | |
9074 | pos = hdr->sh_offset + hdr->sh_size; | |
9075 | amt = hash_table->strtabcount * bed->s->sizeof_sym; | |
9076 | if (bfd_seek (flinfo->output_bfd, pos, SEEK_SET) == 0 | |
9077 | && bfd_bwrite (symbuf, amt, flinfo->output_bfd) == amt) | |
9078 | { | |
9079 | hdr->sh_size += amt; | |
9080 | ret = TRUE; | |
9081 | } | |
9082 | else | |
9083 | ret = FALSE; | |
c152c796 | 9084 | |
ef10c3ac L |
9085 | free (symbuf); |
9086 | ||
9087 | free (hash_table->strtab); | |
9088 | hash_table->strtab = NULL; | |
9089 | ||
9090 | return ret; | |
c152c796 AM |
9091 | } |
9092 | ||
c0d5a53d L |
9093 | /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */ |
9094 | ||
9095 | static bfd_boolean | |
9096 | check_dynsym (bfd *abfd, Elf_Internal_Sym *sym) | |
9097 | { | |
4fbb74a6 AM |
9098 | if (sym->st_shndx >= (SHN_LORESERVE & 0xffff) |
9099 | && sym->st_shndx < SHN_LORESERVE) | |
c0d5a53d L |
9100 | { |
9101 | /* The gABI doesn't support dynamic symbols in output sections | |
a0c8462f | 9102 | beyond 64k. */ |
4eca0228 | 9103 | _bfd_error_handler |
695344c0 | 9104 | /* xgettext:c-format */ |
c0d5a53d | 9105 | (_("%B: Too many sections: %d (>= %d)"), |
4fbb74a6 | 9106 | abfd, bfd_count_sections (abfd), SHN_LORESERVE & 0xffff); |
c0d5a53d L |
9107 | bfd_set_error (bfd_error_nonrepresentable_section); |
9108 | return FALSE; | |
9109 | } | |
9110 | return TRUE; | |
9111 | } | |
9112 | ||
c152c796 AM |
9113 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
9114 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
9115 | versioned symbol that would normally require an explicit version. | |
9116 | We also handle the case that a DSO references a hidden symbol | |
9117 | which may be satisfied by a versioned symbol in another DSO. */ | |
9118 | ||
9119 | static bfd_boolean | |
9120 | elf_link_check_versioned_symbol (struct bfd_link_info *info, | |
9121 | const struct elf_backend_data *bed, | |
9122 | struct elf_link_hash_entry *h) | |
9123 | { | |
9124 | bfd *abfd; | |
9125 | struct elf_link_loaded_list *loaded; | |
9126 | ||
9127 | if (!is_elf_hash_table (info->hash)) | |
9128 | return FALSE; | |
9129 | ||
90c984fc L |
9130 | /* Check indirect symbol. */ |
9131 | while (h->root.type == bfd_link_hash_indirect) | |
9132 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9133 | ||
c152c796 AM |
9134 | switch (h->root.type) |
9135 | { | |
9136 | default: | |
9137 | abfd = NULL; | |
9138 | break; | |
9139 | ||
9140 | case bfd_link_hash_undefined: | |
9141 | case bfd_link_hash_undefweak: | |
9142 | abfd = h->root.u.undef.abfd; | |
f4ab0e2d L |
9143 | if (abfd == NULL |
9144 | || (abfd->flags & DYNAMIC) == 0 | |
e56f61be | 9145 | || (elf_dyn_lib_class (abfd) & DYN_DT_NEEDED) == 0) |
c152c796 AM |
9146 | return FALSE; |
9147 | break; | |
9148 | ||
9149 | case bfd_link_hash_defined: | |
9150 | case bfd_link_hash_defweak: | |
9151 | abfd = h->root.u.def.section->owner; | |
9152 | break; | |
9153 | ||
9154 | case bfd_link_hash_common: | |
9155 | abfd = h->root.u.c.p->section->owner; | |
9156 | break; | |
9157 | } | |
9158 | BFD_ASSERT (abfd != NULL); | |
9159 | ||
9160 | for (loaded = elf_hash_table (info)->loaded; | |
9161 | loaded != NULL; | |
9162 | loaded = loaded->next) | |
9163 | { | |
9164 | bfd *input; | |
9165 | Elf_Internal_Shdr *hdr; | |
ef53be89 AM |
9166 | size_t symcount; |
9167 | size_t extsymcount; | |
9168 | size_t extsymoff; | |
c152c796 AM |
9169 | Elf_Internal_Shdr *versymhdr; |
9170 | Elf_Internal_Sym *isym; | |
9171 | Elf_Internal_Sym *isymend; | |
9172 | Elf_Internal_Sym *isymbuf; | |
9173 | Elf_External_Versym *ever; | |
9174 | Elf_External_Versym *extversym; | |
9175 | ||
9176 | input = loaded->abfd; | |
9177 | ||
9178 | /* We check each DSO for a possible hidden versioned definition. */ | |
9179 | if (input == abfd | |
9180 | || (input->flags & DYNAMIC) == 0 | |
9181 | || elf_dynversym (input) == 0) | |
9182 | continue; | |
9183 | ||
9184 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
9185 | ||
9186 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
9187 | if (elf_bad_symtab (input)) | |
9188 | { | |
9189 | extsymcount = symcount; | |
9190 | extsymoff = 0; | |
9191 | } | |
9192 | else | |
9193 | { | |
9194 | extsymcount = symcount - hdr->sh_info; | |
9195 | extsymoff = hdr->sh_info; | |
9196 | } | |
9197 | ||
9198 | if (extsymcount == 0) | |
9199 | continue; | |
9200 | ||
9201 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, | |
9202 | NULL, NULL, NULL); | |
9203 | if (isymbuf == NULL) | |
9204 | return FALSE; | |
9205 | ||
9206 | /* Read in any version definitions. */ | |
9207 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
a50b1753 | 9208 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); |
c152c796 AM |
9209 | if (extversym == NULL) |
9210 | goto error_ret; | |
9211 | ||
9212 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 | |
9213 | || (bfd_bread (extversym, versymhdr->sh_size, input) | |
9214 | != versymhdr->sh_size)) | |
9215 | { | |
9216 | free (extversym); | |
9217 | error_ret: | |
9218 | free (isymbuf); | |
9219 | return FALSE; | |
9220 | } | |
9221 | ||
9222 | ever = extversym + extsymoff; | |
9223 | isymend = isymbuf + extsymcount; | |
9224 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
9225 | { | |
9226 | const char *name; | |
9227 | Elf_Internal_Versym iver; | |
9228 | unsigned short version_index; | |
9229 | ||
9230 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL | |
9231 | || isym->st_shndx == SHN_UNDEF) | |
9232 | continue; | |
9233 | ||
9234 | name = bfd_elf_string_from_elf_section (input, | |
9235 | hdr->sh_link, | |
9236 | isym->st_name); | |
9237 | if (strcmp (name, h->root.root.string) != 0) | |
9238 | continue; | |
9239 | ||
9240 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
9241 | ||
d023c380 L |
9242 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 |
9243 | && !(h->def_regular | |
9244 | && h->forced_local)) | |
c152c796 AM |
9245 | { |
9246 | /* If we have a non-hidden versioned sym, then it should | |
d023c380 L |
9247 | have provided a definition for the undefined sym unless |
9248 | it is defined in a non-shared object and forced local. | |
9249 | */ | |
c152c796 AM |
9250 | abort (); |
9251 | } | |
9252 | ||
9253 | version_index = iver.vs_vers & VERSYM_VERSION; | |
9254 | if (version_index == 1 || version_index == 2) | |
9255 | { | |
9256 | /* This is the base or first version. We can use it. */ | |
9257 | free (extversym); | |
9258 | free (isymbuf); | |
9259 | return TRUE; | |
9260 | } | |
9261 | } | |
9262 | ||
9263 | free (extversym); | |
9264 | free (isymbuf); | |
9265 | } | |
9266 | ||
9267 | return FALSE; | |
9268 | } | |
9269 | ||
b8871f35 L |
9270 | /* Convert ELF common symbol TYPE. */ |
9271 | ||
9272 | static int | |
9273 | elf_link_convert_common_type (struct bfd_link_info *info, int type) | |
9274 | { | |
9275 | /* Commom symbol can only appear in relocatable link. */ | |
9276 | if (!bfd_link_relocatable (info)) | |
9277 | abort (); | |
9278 | switch (info->elf_stt_common) | |
9279 | { | |
9280 | case unchanged: | |
9281 | break; | |
9282 | case elf_stt_common: | |
9283 | type = STT_COMMON; | |
9284 | break; | |
9285 | case no_elf_stt_common: | |
9286 | type = STT_OBJECT; | |
9287 | break; | |
9288 | } | |
9289 | return type; | |
9290 | } | |
9291 | ||
c152c796 AM |
9292 | /* Add an external symbol to the symbol table. This is called from |
9293 | the hash table traversal routine. When generating a shared object, | |
9294 | we go through the symbol table twice. The first time we output | |
9295 | anything that might have been forced to local scope in a version | |
9296 | script. The second time we output the symbols that are still | |
9297 | global symbols. */ | |
9298 | ||
9299 | static bfd_boolean | |
7686d77d | 9300 | elf_link_output_extsym (struct bfd_hash_entry *bh, void *data) |
c152c796 | 9301 | { |
7686d77d | 9302 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; |
a50b1753 | 9303 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; |
8b127cbc | 9304 | struct elf_final_link_info *flinfo = eoinfo->flinfo; |
c152c796 AM |
9305 | bfd_boolean strip; |
9306 | Elf_Internal_Sym sym; | |
9307 | asection *input_sec; | |
9308 | const struct elf_backend_data *bed; | |
6e0b88f1 AM |
9309 | long indx; |
9310 | int ret; | |
b8871f35 | 9311 | unsigned int type; |
c152c796 AM |
9312 | |
9313 | if (h->root.type == bfd_link_hash_warning) | |
9314 | { | |
9315 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9316 | if (h->root.type == bfd_link_hash_new) | |
9317 | return TRUE; | |
9318 | } | |
9319 | ||
9320 | /* Decide whether to output this symbol in this pass. */ | |
9321 | if (eoinfo->localsyms) | |
9322 | { | |
4deb8f71 | 9323 | if (!h->forced_local) |
c152c796 AM |
9324 | return TRUE; |
9325 | } | |
9326 | else | |
9327 | { | |
4deb8f71 | 9328 | if (h->forced_local) |
c152c796 AM |
9329 | return TRUE; |
9330 | } | |
9331 | ||
8b127cbc | 9332 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 | 9333 | |
12ac1cf5 | 9334 | if (h->root.type == bfd_link_hash_undefined) |
c152c796 | 9335 | { |
12ac1cf5 NC |
9336 | /* If we have an undefined symbol reference here then it must have |
9337 | come from a shared library that is being linked in. (Undefined | |
98da7939 L |
9338 | references in regular files have already been handled unless |
9339 | they are in unreferenced sections which are removed by garbage | |
9340 | collection). */ | |
12ac1cf5 NC |
9341 | bfd_boolean ignore_undef = FALSE; |
9342 | ||
9343 | /* Some symbols may be special in that the fact that they're | |
9344 | undefined can be safely ignored - let backend determine that. */ | |
9345 | if (bed->elf_backend_ignore_undef_symbol) | |
9346 | ignore_undef = bed->elf_backend_ignore_undef_symbol (h); | |
9347 | ||
9348 | /* If we are reporting errors for this situation then do so now. */ | |
89a2ee5a | 9349 | if (!ignore_undef |
12ac1cf5 | 9350 | && h->ref_dynamic |
8b127cbc AM |
9351 | && (!h->ref_regular || flinfo->info->gc_sections) |
9352 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h) | |
9353 | && flinfo->info->unresolved_syms_in_shared_libs != RM_IGNORE) | |
1a72702b AM |
9354 | (*flinfo->info->callbacks->undefined_symbol) |
9355 | (flinfo->info, h->root.root.string, | |
9356 | h->ref_regular ? NULL : h->root.u.undef.abfd, | |
9357 | NULL, 0, | |
9358 | flinfo->info->unresolved_syms_in_shared_libs == RM_GENERATE_ERROR); | |
97196564 L |
9359 | |
9360 | /* Strip a global symbol defined in a discarded section. */ | |
9361 | if (h->indx == -3) | |
9362 | return TRUE; | |
c152c796 AM |
9363 | } |
9364 | ||
9365 | /* We should also warn if a forced local symbol is referenced from | |
9366 | shared libraries. */ | |
0e1862bb | 9367 | if (bfd_link_executable (flinfo->info) |
f5385ebf AM |
9368 | && h->forced_local |
9369 | && h->ref_dynamic | |
371a5866 | 9370 | && h->def_regular |
f5385ebf | 9371 | && !h->dynamic_def |
ee659f1f | 9372 | && h->ref_dynamic_nonweak |
8b127cbc | 9373 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h)) |
c152c796 | 9374 | { |
17d078c5 AM |
9375 | bfd *def_bfd; |
9376 | const char *msg; | |
90c984fc L |
9377 | struct elf_link_hash_entry *hi = h; |
9378 | ||
9379 | /* Check indirect symbol. */ | |
9380 | while (hi->root.type == bfd_link_hash_indirect) | |
9381 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
17d078c5 AM |
9382 | |
9383 | if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
695344c0 | 9384 | /* xgettext:c-format */ |
17d078c5 AM |
9385 | msg = _("%B: internal symbol `%s' in %B is referenced by DSO"); |
9386 | else if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) | |
695344c0 | 9387 | /* xgettext:c-format */ |
17d078c5 AM |
9388 | msg = _("%B: hidden symbol `%s' in %B is referenced by DSO"); |
9389 | else | |
695344c0 | 9390 | /* xgettext:c-format */ |
17d078c5 | 9391 | msg = _("%B: local symbol `%s' in %B is referenced by DSO"); |
8b127cbc | 9392 | def_bfd = flinfo->output_bfd; |
90c984fc L |
9393 | if (hi->root.u.def.section != bfd_abs_section_ptr) |
9394 | def_bfd = hi->root.u.def.section->owner; | |
4eca0228 AM |
9395 | _bfd_error_handler (msg, flinfo->output_bfd, def_bfd, |
9396 | h->root.root.string); | |
17d078c5 | 9397 | bfd_set_error (bfd_error_bad_value); |
c152c796 AM |
9398 | eoinfo->failed = TRUE; |
9399 | return FALSE; | |
9400 | } | |
9401 | ||
9402 | /* We don't want to output symbols that have never been mentioned by | |
9403 | a regular file, or that we have been told to strip. However, if | |
9404 | h->indx is set to -2, the symbol is used by a reloc and we must | |
9405 | output it. */ | |
d983c8c5 | 9406 | strip = FALSE; |
c152c796 | 9407 | if (h->indx == -2) |
d983c8c5 | 9408 | ; |
f5385ebf | 9409 | else if ((h->def_dynamic |
77cfaee6 AM |
9410 | || h->ref_dynamic |
9411 | || h->root.type == bfd_link_hash_new) | |
f5385ebf AM |
9412 | && !h->def_regular |
9413 | && !h->ref_regular) | |
c152c796 | 9414 | strip = TRUE; |
8b127cbc | 9415 | else if (flinfo->info->strip == strip_all) |
c152c796 | 9416 | strip = TRUE; |
8b127cbc AM |
9417 | else if (flinfo->info->strip == strip_some |
9418 | && bfd_hash_lookup (flinfo->info->keep_hash, | |
c152c796 AM |
9419 | h->root.root.string, FALSE, FALSE) == NULL) |
9420 | strip = TRUE; | |
d56d55e7 AM |
9421 | else if ((h->root.type == bfd_link_hash_defined |
9422 | || h->root.type == bfd_link_hash_defweak) | |
8b127cbc | 9423 | && ((flinfo->info->strip_discarded |
dbaa2011 | 9424 | && discarded_section (h->root.u.def.section)) |
ca4be51c AM |
9425 | || ((h->root.u.def.section->flags & SEC_LINKER_CREATED) == 0 |
9426 | && h->root.u.def.section->owner != NULL | |
d56d55e7 | 9427 | && (h->root.u.def.section->owner->flags & BFD_PLUGIN) != 0))) |
c152c796 | 9428 | strip = TRUE; |
9e2278f5 AM |
9429 | else if ((h->root.type == bfd_link_hash_undefined |
9430 | || h->root.type == bfd_link_hash_undefweak) | |
9431 | && h->root.u.undef.abfd != NULL | |
9432 | && (h->root.u.undef.abfd->flags & BFD_PLUGIN) != 0) | |
9433 | strip = TRUE; | |
c152c796 | 9434 | |
b8871f35 L |
9435 | type = h->type; |
9436 | ||
c152c796 | 9437 | /* If we're stripping it, and it's not a dynamic symbol, there's |
d983c8c5 AM |
9438 | nothing else to do. However, if it is a forced local symbol or |
9439 | an ifunc symbol we need to give the backend finish_dynamic_symbol | |
9440 | function a chance to make it dynamic. */ | |
c152c796 AM |
9441 | if (strip |
9442 | && h->dynindx == -1 | |
b8871f35 | 9443 | && type != STT_GNU_IFUNC |
f5385ebf | 9444 | && !h->forced_local) |
c152c796 AM |
9445 | return TRUE; |
9446 | ||
9447 | sym.st_value = 0; | |
9448 | sym.st_size = h->size; | |
9449 | sym.st_other = h->other; | |
c152c796 AM |
9450 | switch (h->root.type) |
9451 | { | |
9452 | default: | |
9453 | case bfd_link_hash_new: | |
9454 | case bfd_link_hash_warning: | |
9455 | abort (); | |
9456 | return FALSE; | |
9457 | ||
9458 | case bfd_link_hash_undefined: | |
9459 | case bfd_link_hash_undefweak: | |
9460 | input_sec = bfd_und_section_ptr; | |
9461 | sym.st_shndx = SHN_UNDEF; | |
9462 | break; | |
9463 | ||
9464 | case bfd_link_hash_defined: | |
9465 | case bfd_link_hash_defweak: | |
9466 | { | |
9467 | input_sec = h->root.u.def.section; | |
9468 | if (input_sec->output_section != NULL) | |
9469 | { | |
9470 | sym.st_shndx = | |
8b127cbc | 9471 | _bfd_elf_section_from_bfd_section (flinfo->output_bfd, |
c152c796 AM |
9472 | input_sec->output_section); |
9473 | if (sym.st_shndx == SHN_BAD) | |
9474 | { | |
4eca0228 | 9475 | _bfd_error_handler |
695344c0 | 9476 | /* xgettext:c-format */ |
d003868e | 9477 | (_("%B: could not find output section %A for input section %A"), |
8b127cbc | 9478 | flinfo->output_bfd, input_sec->output_section, input_sec); |
17d078c5 | 9479 | bfd_set_error (bfd_error_nonrepresentable_section); |
c152c796 AM |
9480 | eoinfo->failed = TRUE; |
9481 | return FALSE; | |
9482 | } | |
9483 | ||
9484 | /* ELF symbols in relocatable files are section relative, | |
9485 | but in nonrelocatable files they are virtual | |
9486 | addresses. */ | |
9487 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
0e1862bb | 9488 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
9489 | { |
9490 | sym.st_value += input_sec->output_section->vma; | |
9491 | if (h->type == STT_TLS) | |
9492 | { | |
8b127cbc | 9493 | asection *tls_sec = elf_hash_table (flinfo->info)->tls_sec; |
430a16a5 NC |
9494 | if (tls_sec != NULL) |
9495 | sym.st_value -= tls_sec->vma; | |
c152c796 AM |
9496 | } |
9497 | } | |
9498 | } | |
9499 | else | |
9500 | { | |
9501 | BFD_ASSERT (input_sec->owner == NULL | |
9502 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
9503 | sym.st_shndx = SHN_UNDEF; | |
9504 | input_sec = bfd_und_section_ptr; | |
9505 | } | |
9506 | } | |
9507 | break; | |
9508 | ||
9509 | case bfd_link_hash_common: | |
9510 | input_sec = h->root.u.c.p->section; | |
a4d8e49b | 9511 | sym.st_shndx = bed->common_section_index (input_sec); |
c152c796 AM |
9512 | sym.st_value = 1 << h->root.u.c.p->alignment_power; |
9513 | break; | |
9514 | ||
9515 | case bfd_link_hash_indirect: | |
9516 | /* These symbols are created by symbol versioning. They point | |
9517 | to the decorated version of the name. For example, if the | |
9518 | symbol foo@@GNU_1.2 is the default, which should be used when | |
9519 | foo is used with no version, then we add an indirect symbol | |
9520 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
9521 | since the indirected symbol is already in the hash table. */ | |
9522 | return TRUE; | |
9523 | } | |
9524 | ||
b8871f35 L |
9525 | if (type == STT_COMMON || type == STT_OBJECT) |
9526 | switch (h->root.type) | |
9527 | { | |
9528 | case bfd_link_hash_common: | |
9529 | type = elf_link_convert_common_type (flinfo->info, type); | |
9530 | break; | |
9531 | case bfd_link_hash_defined: | |
9532 | case bfd_link_hash_defweak: | |
9533 | if (bed->common_definition (&sym)) | |
9534 | type = elf_link_convert_common_type (flinfo->info, type); | |
9535 | else | |
9536 | type = STT_OBJECT; | |
9537 | break; | |
9538 | case bfd_link_hash_undefined: | |
9539 | case bfd_link_hash_undefweak: | |
9540 | break; | |
9541 | default: | |
9542 | abort (); | |
9543 | } | |
9544 | ||
4deb8f71 | 9545 | if (h->forced_local) |
b8871f35 L |
9546 | { |
9547 | sym.st_info = ELF_ST_INFO (STB_LOCAL, type); | |
9548 | /* Turn off visibility on local symbol. */ | |
9549 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); | |
9550 | } | |
9551 | /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */ | |
9552 | else if (h->unique_global && h->def_regular) | |
9553 | sym.st_info = ELF_ST_INFO (STB_GNU_UNIQUE, type); | |
9554 | else if (h->root.type == bfd_link_hash_undefweak | |
9555 | || h->root.type == bfd_link_hash_defweak) | |
9556 | sym.st_info = ELF_ST_INFO (STB_WEAK, type); | |
9557 | else | |
9558 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, type); | |
9559 | sym.st_target_internal = h->target_internal; | |
9560 | ||
c152c796 AM |
9561 | /* Give the processor backend a chance to tweak the symbol value, |
9562 | and also to finish up anything that needs to be done for this | |
9563 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for | |
3aa14d16 | 9564 | forced local syms when non-shared is due to a historical quirk. |
5f35ea9c | 9565 | STT_GNU_IFUNC symbol must go through PLT. */ |
3aa14d16 | 9566 | if ((h->type == STT_GNU_IFUNC |
5f35ea9c | 9567 | && h->def_regular |
0e1862bb | 9568 | && !bfd_link_relocatable (flinfo->info)) |
3aa14d16 L |
9569 | || ((h->dynindx != -1 |
9570 | || h->forced_local) | |
0e1862bb | 9571 | && ((bfd_link_pic (flinfo->info) |
3aa14d16 L |
9572 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
9573 | || h->root.type != bfd_link_hash_undefweak)) | |
9574 | || !h->forced_local) | |
8b127cbc | 9575 | && elf_hash_table (flinfo->info)->dynamic_sections_created)) |
c152c796 AM |
9576 | { |
9577 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
8b127cbc | 9578 | (flinfo->output_bfd, flinfo->info, h, &sym))) |
c152c796 AM |
9579 | { |
9580 | eoinfo->failed = TRUE; | |
9581 | return FALSE; | |
9582 | } | |
9583 | } | |
9584 | ||
9585 | /* If we are marking the symbol as undefined, and there are no | |
9586 | non-weak references to this symbol from a regular object, then | |
9587 | mark the symbol as weak undefined; if there are non-weak | |
9588 | references, mark the symbol as strong. We can't do this earlier, | |
9589 | because it might not be marked as undefined until the | |
9590 | finish_dynamic_symbol routine gets through with it. */ | |
9591 | if (sym.st_shndx == SHN_UNDEF | |
f5385ebf | 9592 | && h->ref_regular |
c152c796 AM |
9593 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
9594 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
9595 | { | |
9596 | int bindtype; | |
b8871f35 | 9597 | type = ELF_ST_TYPE (sym.st_info); |
2955ec4c L |
9598 | |
9599 | /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */ | |
9600 | if (type == STT_GNU_IFUNC) | |
9601 | type = STT_FUNC; | |
c152c796 | 9602 | |
f5385ebf | 9603 | if (h->ref_regular_nonweak) |
c152c796 AM |
9604 | bindtype = STB_GLOBAL; |
9605 | else | |
9606 | bindtype = STB_WEAK; | |
2955ec4c | 9607 | sym.st_info = ELF_ST_INFO (bindtype, type); |
c152c796 AM |
9608 | } |
9609 | ||
bda987c2 CD |
9610 | /* If this is a symbol defined in a dynamic library, don't use the |
9611 | symbol size from the dynamic library. Relinking an executable | |
9612 | against a new library may introduce gratuitous changes in the | |
9613 | executable's symbols if we keep the size. */ | |
9614 | if (sym.st_shndx == SHN_UNDEF | |
9615 | && !h->def_regular | |
9616 | && h->def_dynamic) | |
9617 | sym.st_size = 0; | |
9618 | ||
c152c796 AM |
9619 | /* If a non-weak symbol with non-default visibility is not defined |
9620 | locally, it is a fatal error. */ | |
0e1862bb | 9621 | if (!bfd_link_relocatable (flinfo->info) |
c152c796 AM |
9622 | && ELF_ST_VISIBILITY (sym.st_other) != STV_DEFAULT |
9623 | && ELF_ST_BIND (sym.st_info) != STB_WEAK | |
9624 | && h->root.type == bfd_link_hash_undefined | |
f5385ebf | 9625 | && !h->def_regular) |
c152c796 | 9626 | { |
17d078c5 AM |
9627 | const char *msg; |
9628 | ||
9629 | if (ELF_ST_VISIBILITY (sym.st_other) == STV_PROTECTED) | |
695344c0 | 9630 | /* xgettext:c-format */ |
17d078c5 AM |
9631 | msg = _("%B: protected symbol `%s' isn't defined"); |
9632 | else if (ELF_ST_VISIBILITY (sym.st_other) == STV_INTERNAL) | |
695344c0 | 9633 | /* xgettext:c-format */ |
17d078c5 AM |
9634 | msg = _("%B: internal symbol `%s' isn't defined"); |
9635 | else | |
695344c0 | 9636 | /* xgettext:c-format */ |
17d078c5 | 9637 | msg = _("%B: hidden symbol `%s' isn't defined"); |
4eca0228 | 9638 | _bfd_error_handler (msg, flinfo->output_bfd, h->root.root.string); |
17d078c5 | 9639 | bfd_set_error (bfd_error_bad_value); |
c152c796 AM |
9640 | eoinfo->failed = TRUE; |
9641 | return FALSE; | |
9642 | } | |
9643 | ||
9644 | /* If this symbol should be put in the .dynsym section, then put it | |
9645 | there now. We already know the symbol index. We also fill in | |
9646 | the entry in the .hash section. */ | |
cae1fbbb | 9647 | if (elf_hash_table (flinfo->info)->dynsym != NULL |
202e2356 | 9648 | && h->dynindx != -1 |
8b127cbc | 9649 | && elf_hash_table (flinfo->info)->dynamic_sections_created) |
c152c796 | 9650 | { |
c152c796 AM |
9651 | bfd_byte *esym; |
9652 | ||
90c984fc L |
9653 | /* Since there is no version information in the dynamic string, |
9654 | if there is no version info in symbol version section, we will | |
1659f720 | 9655 | have a run-time problem if not linking executable, referenced |
4deb8f71 | 9656 | by shared library, or not bound locally. */ |
1659f720 | 9657 | if (h->verinfo.verdef == NULL |
0e1862bb | 9658 | && (!bfd_link_executable (flinfo->info) |
1659f720 L |
9659 | || h->ref_dynamic |
9660 | || !h->def_regular)) | |
90c984fc L |
9661 | { |
9662 | char *p = strrchr (h->root.root.string, ELF_VER_CHR); | |
9663 | ||
9664 | if (p && p [1] != '\0') | |
9665 | { | |
4eca0228 | 9666 | _bfd_error_handler |
695344c0 | 9667 | /* xgettext:c-format */ |
90c984fc L |
9668 | (_("%B: No symbol version section for versioned symbol `%s'"), |
9669 | flinfo->output_bfd, h->root.root.string); | |
9670 | eoinfo->failed = TRUE; | |
9671 | return FALSE; | |
9672 | } | |
9673 | } | |
9674 | ||
c152c796 | 9675 | sym.st_name = h->dynstr_index; |
cae1fbbb L |
9676 | esym = (elf_hash_table (flinfo->info)->dynsym->contents |
9677 | + h->dynindx * bed->s->sizeof_sym); | |
8b127cbc | 9678 | if (!check_dynsym (flinfo->output_bfd, &sym)) |
c0d5a53d L |
9679 | { |
9680 | eoinfo->failed = TRUE; | |
9681 | return FALSE; | |
9682 | } | |
8b127cbc | 9683 | bed->s->swap_symbol_out (flinfo->output_bfd, &sym, esym, 0); |
c152c796 | 9684 | |
8b127cbc | 9685 | if (flinfo->hash_sec != NULL) |
fdc90cb4 JJ |
9686 | { |
9687 | size_t hash_entry_size; | |
9688 | bfd_byte *bucketpos; | |
9689 | bfd_vma chain; | |
41198d0c L |
9690 | size_t bucketcount; |
9691 | size_t bucket; | |
9692 | ||
8b127cbc | 9693 | bucketcount = elf_hash_table (flinfo->info)->bucketcount; |
41198d0c | 9694 | bucket = h->u.elf_hash_value % bucketcount; |
fdc90cb4 JJ |
9695 | |
9696 | hash_entry_size | |
8b127cbc AM |
9697 | = elf_section_data (flinfo->hash_sec)->this_hdr.sh_entsize; |
9698 | bucketpos = ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 | 9699 | + (bucket + 2) * hash_entry_size); |
8b127cbc AM |
9700 | chain = bfd_get (8 * hash_entry_size, flinfo->output_bfd, bucketpos); |
9701 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, h->dynindx, | |
9702 | bucketpos); | |
9703 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, chain, | |
9704 | ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 JJ |
9705 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); |
9706 | } | |
c152c796 | 9707 | |
8b127cbc | 9708 | if (flinfo->symver_sec != NULL && flinfo->symver_sec->contents != NULL) |
c152c796 AM |
9709 | { |
9710 | Elf_Internal_Versym iversym; | |
9711 | Elf_External_Versym *eversym; | |
9712 | ||
f5385ebf | 9713 | if (!h->def_regular) |
c152c796 | 9714 | { |
7b20f099 AM |
9715 | if (h->verinfo.verdef == NULL |
9716 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
9717 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
c152c796 AM |
9718 | iversym.vs_vers = 0; |
9719 | else | |
9720 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
9721 | } | |
9722 | else | |
9723 | { | |
9724 | if (h->verinfo.vertree == NULL) | |
9725 | iversym.vs_vers = 1; | |
9726 | else | |
9727 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
8b127cbc | 9728 | if (flinfo->info->create_default_symver) |
3e3b46e5 | 9729 | iversym.vs_vers++; |
c152c796 AM |
9730 | } |
9731 | ||
422f1182 | 9732 | /* Turn on VERSYM_HIDDEN only if the hidden versioned symbol is |
6e33951e | 9733 | defined locally. */ |
422f1182 | 9734 | if (h->versioned == versioned_hidden && h->def_regular) |
c152c796 AM |
9735 | iversym.vs_vers |= VERSYM_HIDDEN; |
9736 | ||
8b127cbc | 9737 | eversym = (Elf_External_Versym *) flinfo->symver_sec->contents; |
c152c796 | 9738 | eversym += h->dynindx; |
8b127cbc | 9739 | _bfd_elf_swap_versym_out (flinfo->output_bfd, &iversym, eversym); |
c152c796 AM |
9740 | } |
9741 | } | |
9742 | ||
d983c8c5 AM |
9743 | /* If the symbol is undefined, and we didn't output it to .dynsym, |
9744 | strip it from .symtab too. Obviously we can't do this for | |
9745 | relocatable output or when needed for --emit-relocs. */ | |
9746 | else if (input_sec == bfd_und_section_ptr | |
9747 | && h->indx != -2 | |
0e1862bb | 9748 | && !bfd_link_relocatable (flinfo->info)) |
d983c8c5 AM |
9749 | return TRUE; |
9750 | /* Also strip others that we couldn't earlier due to dynamic symbol | |
9751 | processing. */ | |
9752 | if (strip) | |
9753 | return TRUE; | |
9754 | if ((input_sec->flags & SEC_EXCLUDE) != 0) | |
c152c796 AM |
9755 | return TRUE; |
9756 | ||
2ec55de3 AM |
9757 | /* Output a FILE symbol so that following locals are not associated |
9758 | with the wrong input file. We need one for forced local symbols | |
9759 | if we've seen more than one FILE symbol or when we have exactly | |
9760 | one FILE symbol but global symbols are present in a file other | |
9761 | than the one with the FILE symbol. We also need one if linker | |
9762 | defined symbols are present. In practice these conditions are | |
9763 | always met, so just emit the FILE symbol unconditionally. */ | |
9764 | if (eoinfo->localsyms | |
9765 | && !eoinfo->file_sym_done | |
9766 | && eoinfo->flinfo->filesym_count != 0) | |
9767 | { | |
9768 | Elf_Internal_Sym fsym; | |
9769 | ||
9770 | memset (&fsym, 0, sizeof (fsym)); | |
9771 | fsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
9772 | fsym.st_shndx = SHN_ABS; | |
ef10c3ac L |
9773 | if (!elf_link_output_symstrtab (eoinfo->flinfo, NULL, &fsym, |
9774 | bfd_und_section_ptr, NULL)) | |
2ec55de3 AM |
9775 | return FALSE; |
9776 | ||
9777 | eoinfo->file_sym_done = TRUE; | |
9778 | } | |
9779 | ||
8b127cbc | 9780 | indx = bfd_get_symcount (flinfo->output_bfd); |
ef10c3ac L |
9781 | ret = elf_link_output_symstrtab (flinfo, h->root.root.string, &sym, |
9782 | input_sec, h); | |
6e0b88f1 | 9783 | if (ret == 0) |
c152c796 AM |
9784 | { |
9785 | eoinfo->failed = TRUE; | |
9786 | return FALSE; | |
9787 | } | |
6e0b88f1 AM |
9788 | else if (ret == 1) |
9789 | h->indx = indx; | |
9790 | else if (h->indx == -2) | |
9791 | abort(); | |
c152c796 AM |
9792 | |
9793 | return TRUE; | |
9794 | } | |
9795 | ||
cdd3575c AM |
9796 | /* Return TRUE if special handling is done for relocs in SEC against |
9797 | symbols defined in discarded sections. */ | |
9798 | ||
c152c796 AM |
9799 | static bfd_boolean |
9800 | elf_section_ignore_discarded_relocs (asection *sec) | |
9801 | { | |
9802 | const struct elf_backend_data *bed; | |
9803 | ||
cdd3575c AM |
9804 | switch (sec->sec_info_type) |
9805 | { | |
dbaa2011 AM |
9806 | case SEC_INFO_TYPE_STABS: |
9807 | case SEC_INFO_TYPE_EH_FRAME: | |
2f0c68f2 | 9808 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
cdd3575c AM |
9809 | return TRUE; |
9810 | default: | |
9811 | break; | |
9812 | } | |
c152c796 AM |
9813 | |
9814 | bed = get_elf_backend_data (sec->owner); | |
9815 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
9816 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
9817 | return TRUE; | |
9818 | ||
9819 | return FALSE; | |
9820 | } | |
9821 | ||
9e66c942 AM |
9822 | /* Return a mask saying how ld should treat relocations in SEC against |
9823 | symbols defined in discarded sections. If this function returns | |
9824 | COMPLAIN set, ld will issue a warning message. If this function | |
9825 | returns PRETEND set, and the discarded section was link-once and the | |
9826 | same size as the kept link-once section, ld will pretend that the | |
9827 | symbol was actually defined in the kept section. Otherwise ld will | |
9828 | zero the reloc (at least that is the intent, but some cooperation by | |
9829 | the target dependent code is needed, particularly for REL targets). */ | |
9830 | ||
8a696751 AM |
9831 | unsigned int |
9832 | _bfd_elf_default_action_discarded (asection *sec) | |
cdd3575c | 9833 | { |
9e66c942 | 9834 | if (sec->flags & SEC_DEBUGGING) |
69d54b1b | 9835 | return PRETEND; |
cdd3575c AM |
9836 | |
9837 | if (strcmp (".eh_frame", sec->name) == 0) | |
9e66c942 | 9838 | return 0; |
cdd3575c AM |
9839 | |
9840 | if (strcmp (".gcc_except_table", sec->name) == 0) | |
9e66c942 | 9841 | return 0; |
cdd3575c | 9842 | |
9e66c942 | 9843 | return COMPLAIN | PRETEND; |
cdd3575c AM |
9844 | } |
9845 | ||
3d7f7666 L |
9846 | /* Find a match between a section and a member of a section group. */ |
9847 | ||
9848 | static asection * | |
c0f00686 L |
9849 | match_group_member (asection *sec, asection *group, |
9850 | struct bfd_link_info *info) | |
3d7f7666 L |
9851 | { |
9852 | asection *first = elf_next_in_group (group); | |
9853 | asection *s = first; | |
9854 | ||
9855 | while (s != NULL) | |
9856 | { | |
c0f00686 | 9857 | if (bfd_elf_match_symbols_in_sections (s, sec, info)) |
3d7f7666 L |
9858 | return s; |
9859 | ||
83180ade | 9860 | s = elf_next_in_group (s); |
3d7f7666 L |
9861 | if (s == first) |
9862 | break; | |
9863 | } | |
9864 | ||
9865 | return NULL; | |
9866 | } | |
9867 | ||
01b3c8ab | 9868 | /* Check if the kept section of a discarded section SEC can be used |
c2370991 AM |
9869 | to replace it. Return the replacement if it is OK. Otherwise return |
9870 | NULL. */ | |
01b3c8ab L |
9871 | |
9872 | asection * | |
c0f00686 | 9873 | _bfd_elf_check_kept_section (asection *sec, struct bfd_link_info *info) |
01b3c8ab L |
9874 | { |
9875 | asection *kept; | |
9876 | ||
9877 | kept = sec->kept_section; | |
9878 | if (kept != NULL) | |
9879 | { | |
c2370991 | 9880 | if ((kept->flags & SEC_GROUP) != 0) |
c0f00686 | 9881 | kept = match_group_member (sec, kept, info); |
1dd2625f BW |
9882 | if (kept != NULL |
9883 | && ((sec->rawsize != 0 ? sec->rawsize : sec->size) | |
9884 | != (kept->rawsize != 0 ? kept->rawsize : kept->size))) | |
01b3c8ab | 9885 | kept = NULL; |
c2370991 | 9886 | sec->kept_section = kept; |
01b3c8ab L |
9887 | } |
9888 | return kept; | |
9889 | } | |
9890 | ||
c152c796 AM |
9891 | /* Link an input file into the linker output file. This function |
9892 | handles all the sections and relocations of the input file at once. | |
9893 | This is so that we only have to read the local symbols once, and | |
9894 | don't have to keep them in memory. */ | |
9895 | ||
9896 | static bfd_boolean | |
8b127cbc | 9897 | elf_link_input_bfd (struct elf_final_link_info *flinfo, bfd *input_bfd) |
c152c796 | 9898 | { |
ece5ef60 | 9899 | int (*relocate_section) |
c152c796 AM |
9900 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
9901 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); | |
9902 | bfd *output_bfd; | |
9903 | Elf_Internal_Shdr *symtab_hdr; | |
9904 | size_t locsymcount; | |
9905 | size_t extsymoff; | |
9906 | Elf_Internal_Sym *isymbuf; | |
9907 | Elf_Internal_Sym *isym; | |
9908 | Elf_Internal_Sym *isymend; | |
9909 | long *pindex; | |
9910 | asection **ppsection; | |
9911 | asection *o; | |
9912 | const struct elf_backend_data *bed; | |
c152c796 | 9913 | struct elf_link_hash_entry **sym_hashes; |
310fd250 L |
9914 | bfd_size_type address_size; |
9915 | bfd_vma r_type_mask; | |
9916 | int r_sym_shift; | |
ffbc01cc | 9917 | bfd_boolean have_file_sym = FALSE; |
c152c796 | 9918 | |
8b127cbc | 9919 | output_bfd = flinfo->output_bfd; |
c152c796 AM |
9920 | bed = get_elf_backend_data (output_bfd); |
9921 | relocate_section = bed->elf_backend_relocate_section; | |
9922 | ||
9923 | /* If this is a dynamic object, we don't want to do anything here: | |
9924 | we don't want the local symbols, and we don't want the section | |
9925 | contents. */ | |
9926 | if ((input_bfd->flags & DYNAMIC) != 0) | |
9927 | return TRUE; | |
9928 | ||
c152c796 AM |
9929 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
9930 | if (elf_bad_symtab (input_bfd)) | |
9931 | { | |
9932 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
9933 | extsymoff = 0; | |
9934 | } | |
9935 | else | |
9936 | { | |
9937 | locsymcount = symtab_hdr->sh_info; | |
9938 | extsymoff = symtab_hdr->sh_info; | |
9939 | } | |
9940 | ||
9941 | /* Read the local symbols. */ | |
9942 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
9943 | if (isymbuf == NULL && locsymcount != 0) | |
9944 | { | |
9945 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
8b127cbc AM |
9946 | flinfo->internal_syms, |
9947 | flinfo->external_syms, | |
9948 | flinfo->locsym_shndx); | |
c152c796 AM |
9949 | if (isymbuf == NULL) |
9950 | return FALSE; | |
9951 | } | |
9952 | ||
9953 | /* Find local symbol sections and adjust values of symbols in | |
9954 | SEC_MERGE sections. Write out those local symbols we know are | |
9955 | going into the output file. */ | |
9956 | isymend = isymbuf + locsymcount; | |
8b127cbc | 9957 | for (isym = isymbuf, pindex = flinfo->indices, ppsection = flinfo->sections; |
c152c796 AM |
9958 | isym < isymend; |
9959 | isym++, pindex++, ppsection++) | |
9960 | { | |
9961 | asection *isec; | |
9962 | const char *name; | |
9963 | Elf_Internal_Sym osym; | |
6e0b88f1 AM |
9964 | long indx; |
9965 | int ret; | |
c152c796 AM |
9966 | |
9967 | *pindex = -1; | |
9968 | ||
9969 | if (elf_bad_symtab (input_bfd)) | |
9970 | { | |
9971 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
9972 | { | |
9973 | *ppsection = NULL; | |
9974 | continue; | |
9975 | } | |
9976 | } | |
9977 | ||
9978 | if (isym->st_shndx == SHN_UNDEF) | |
9979 | isec = bfd_und_section_ptr; | |
c152c796 AM |
9980 | else if (isym->st_shndx == SHN_ABS) |
9981 | isec = bfd_abs_section_ptr; | |
9982 | else if (isym->st_shndx == SHN_COMMON) | |
9983 | isec = bfd_com_section_ptr; | |
9984 | else | |
9985 | { | |
cb33740c AM |
9986 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
9987 | if (isec == NULL) | |
9988 | { | |
9989 | /* Don't attempt to output symbols with st_shnx in the | |
9990 | reserved range other than SHN_ABS and SHN_COMMON. */ | |
9991 | *ppsection = NULL; | |
9992 | continue; | |
9993 | } | |
dbaa2011 | 9994 | else if (isec->sec_info_type == SEC_INFO_TYPE_MERGE |
cb33740c AM |
9995 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
9996 | isym->st_value = | |
9997 | _bfd_merged_section_offset (output_bfd, &isec, | |
9998 | elf_section_data (isec)->sec_info, | |
9999 | isym->st_value); | |
c152c796 AM |
10000 | } |
10001 | ||
10002 | *ppsection = isec; | |
10003 | ||
d983c8c5 AM |
10004 | /* Don't output the first, undefined, symbol. In fact, don't |
10005 | output any undefined local symbol. */ | |
10006 | if (isec == bfd_und_section_ptr) | |
c152c796 AM |
10007 | continue; |
10008 | ||
10009 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
10010 | { | |
10011 | /* We never output section symbols. Instead, we use the | |
10012 | section symbol of the corresponding section in the output | |
10013 | file. */ | |
10014 | continue; | |
10015 | } | |
10016 | ||
10017 | /* If we are stripping all symbols, we don't want to output this | |
10018 | one. */ | |
8b127cbc | 10019 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
10020 | continue; |
10021 | ||
10022 | /* If we are discarding all local symbols, we don't want to | |
10023 | output this one. If we are generating a relocatable output | |
10024 | file, then some of the local symbols may be required by | |
10025 | relocs; we output them below as we discover that they are | |
10026 | needed. */ | |
8b127cbc | 10027 | if (flinfo->info->discard == discard_all) |
c152c796 AM |
10028 | continue; |
10029 | ||
10030 | /* If this symbol is defined in a section which we are | |
f02571c5 AM |
10031 | discarding, we don't need to keep it. */ |
10032 | if (isym->st_shndx != SHN_UNDEF | |
4fbb74a6 AM |
10033 | && isym->st_shndx < SHN_LORESERVE |
10034 | && bfd_section_removed_from_list (output_bfd, | |
10035 | isec->output_section)) | |
e75a280b L |
10036 | continue; |
10037 | ||
c152c796 AM |
10038 | /* Get the name of the symbol. */ |
10039 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
10040 | isym->st_name); | |
10041 | if (name == NULL) | |
10042 | return FALSE; | |
10043 | ||
10044 | /* See if we are discarding symbols with this name. */ | |
8b127cbc AM |
10045 | if ((flinfo->info->strip == strip_some |
10046 | && (bfd_hash_lookup (flinfo->info->keep_hash, name, FALSE, FALSE) | |
c152c796 | 10047 | == NULL)) |
8b127cbc | 10048 | || (((flinfo->info->discard == discard_sec_merge |
0e1862bb L |
10049 | && (isec->flags & SEC_MERGE) |
10050 | && !bfd_link_relocatable (flinfo->info)) | |
8b127cbc | 10051 | || flinfo->info->discard == discard_l) |
c152c796 AM |
10052 | && bfd_is_local_label_name (input_bfd, name))) |
10053 | continue; | |
10054 | ||
ffbc01cc AM |
10055 | if (ELF_ST_TYPE (isym->st_info) == STT_FILE) |
10056 | { | |
ce875075 AM |
10057 | if (input_bfd->lto_output) |
10058 | /* -flto puts a temp file name here. This means builds | |
10059 | are not reproducible. Discard the symbol. */ | |
10060 | continue; | |
ffbc01cc AM |
10061 | have_file_sym = TRUE; |
10062 | flinfo->filesym_count += 1; | |
10063 | } | |
10064 | if (!have_file_sym) | |
10065 | { | |
10066 | /* In the absence of debug info, bfd_find_nearest_line uses | |
10067 | FILE symbols to determine the source file for local | |
10068 | function symbols. Provide a FILE symbol here if input | |
10069 | files lack such, so that their symbols won't be | |
10070 | associated with a previous input file. It's not the | |
10071 | source file, but the best we can do. */ | |
10072 | have_file_sym = TRUE; | |
10073 | flinfo->filesym_count += 1; | |
10074 | memset (&osym, 0, sizeof (osym)); | |
10075 | osym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
10076 | osym.st_shndx = SHN_ABS; | |
ef10c3ac L |
10077 | if (!elf_link_output_symstrtab (flinfo, |
10078 | (input_bfd->lto_output ? NULL | |
10079 | : input_bfd->filename), | |
10080 | &osym, bfd_abs_section_ptr, | |
10081 | NULL)) | |
ffbc01cc AM |
10082 | return FALSE; |
10083 | } | |
10084 | ||
c152c796 AM |
10085 | osym = *isym; |
10086 | ||
10087 | /* Adjust the section index for the output file. */ | |
10088 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
10089 | isec->output_section); | |
10090 | if (osym.st_shndx == SHN_BAD) | |
10091 | return FALSE; | |
10092 | ||
c152c796 AM |
10093 | /* ELF symbols in relocatable files are section relative, but |
10094 | in executable files they are virtual addresses. Note that | |
10095 | this code assumes that all ELF sections have an associated | |
10096 | BFD section with a reasonable value for output_offset; below | |
10097 | we assume that they also have a reasonable value for | |
10098 | output_section. Any special sections must be set up to meet | |
10099 | these requirements. */ | |
10100 | osym.st_value += isec->output_offset; | |
0e1862bb | 10101 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10102 | { |
10103 | osym.st_value += isec->output_section->vma; | |
10104 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
10105 | { | |
10106 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
8b127cbc AM |
10107 | BFD_ASSERT (elf_hash_table (flinfo->info)->tls_sec != NULL); |
10108 | osym.st_value -= elf_hash_table (flinfo->info)->tls_sec->vma; | |
c152c796 AM |
10109 | } |
10110 | } | |
10111 | ||
6e0b88f1 | 10112 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac | 10113 | ret = elf_link_output_symstrtab (flinfo, name, &osym, isec, NULL); |
6e0b88f1 | 10114 | if (ret == 0) |
c152c796 | 10115 | return FALSE; |
6e0b88f1 AM |
10116 | else if (ret == 1) |
10117 | *pindex = indx; | |
c152c796 AM |
10118 | } |
10119 | ||
310fd250 L |
10120 | if (bed->s->arch_size == 32) |
10121 | { | |
10122 | r_type_mask = 0xff; | |
10123 | r_sym_shift = 8; | |
10124 | address_size = 4; | |
10125 | } | |
10126 | else | |
10127 | { | |
10128 | r_type_mask = 0xffffffff; | |
10129 | r_sym_shift = 32; | |
10130 | address_size = 8; | |
10131 | } | |
10132 | ||
c152c796 AM |
10133 | /* Relocate the contents of each section. */ |
10134 | sym_hashes = elf_sym_hashes (input_bfd); | |
10135 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
10136 | { | |
10137 | bfd_byte *contents; | |
10138 | ||
10139 | if (! o->linker_mark) | |
10140 | { | |
10141 | /* This section was omitted from the link. */ | |
10142 | continue; | |
10143 | } | |
10144 | ||
0e1862bb | 10145 | if (bfd_link_relocatable (flinfo->info) |
bcacc0f5 AM |
10146 | && (o->flags & (SEC_LINKER_CREATED | SEC_GROUP)) == SEC_GROUP) |
10147 | { | |
10148 | /* Deal with the group signature symbol. */ | |
10149 | struct bfd_elf_section_data *sec_data = elf_section_data (o); | |
10150 | unsigned long symndx = sec_data->this_hdr.sh_info; | |
10151 | asection *osec = o->output_section; | |
10152 | ||
10153 | if (symndx >= locsymcount | |
10154 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 10155 | && flinfo->sections[symndx] == NULL)) |
bcacc0f5 AM |
10156 | { |
10157 | struct elf_link_hash_entry *h = sym_hashes[symndx - extsymoff]; | |
10158 | while (h->root.type == bfd_link_hash_indirect | |
10159 | || h->root.type == bfd_link_hash_warning) | |
10160 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10161 | /* Arrange for symbol to be output. */ | |
10162 | h->indx = -2; | |
10163 | elf_section_data (osec)->this_hdr.sh_info = -2; | |
10164 | } | |
10165 | else if (ELF_ST_TYPE (isymbuf[symndx].st_info) == STT_SECTION) | |
10166 | { | |
10167 | /* We'll use the output section target_index. */ | |
8b127cbc | 10168 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 AM |
10169 | elf_section_data (osec)->this_hdr.sh_info = sec->target_index; |
10170 | } | |
10171 | else | |
10172 | { | |
8b127cbc | 10173 | if (flinfo->indices[symndx] == -1) |
bcacc0f5 AM |
10174 | { |
10175 | /* Otherwise output the local symbol now. */ | |
10176 | Elf_Internal_Sym sym = isymbuf[symndx]; | |
8b127cbc | 10177 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 | 10178 | const char *name; |
6e0b88f1 AM |
10179 | long indx; |
10180 | int ret; | |
bcacc0f5 AM |
10181 | |
10182 | name = bfd_elf_string_from_elf_section (input_bfd, | |
10183 | symtab_hdr->sh_link, | |
10184 | sym.st_name); | |
10185 | if (name == NULL) | |
10186 | return FALSE; | |
10187 | ||
10188 | sym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
10189 | sec); | |
10190 | if (sym.st_shndx == SHN_BAD) | |
10191 | return FALSE; | |
10192 | ||
10193 | sym.st_value += o->output_offset; | |
10194 | ||
6e0b88f1 | 10195 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
10196 | ret = elf_link_output_symstrtab (flinfo, name, &sym, o, |
10197 | NULL); | |
6e0b88f1 | 10198 | if (ret == 0) |
bcacc0f5 | 10199 | return FALSE; |
6e0b88f1 | 10200 | else if (ret == 1) |
8b127cbc | 10201 | flinfo->indices[symndx] = indx; |
6e0b88f1 AM |
10202 | else |
10203 | abort (); | |
bcacc0f5 AM |
10204 | } |
10205 | elf_section_data (osec)->this_hdr.sh_info | |
8b127cbc | 10206 | = flinfo->indices[symndx]; |
bcacc0f5 AM |
10207 | } |
10208 | } | |
10209 | ||
c152c796 | 10210 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
eea6121a | 10211 | || (o->size == 0 && (o->flags & SEC_RELOC) == 0)) |
c152c796 AM |
10212 | continue; |
10213 | ||
10214 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
10215 | { | |
10216 | /* Section was created by _bfd_elf_link_create_dynamic_sections | |
10217 | or somesuch. */ | |
10218 | continue; | |
10219 | } | |
10220 | ||
10221 | /* Get the contents of the section. They have been cached by a | |
10222 | relaxation routine. Note that o is a section in an input | |
10223 | file, so the contents field will not have been set by any of | |
10224 | the routines which work on output files. */ | |
10225 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
53291d1f AM |
10226 | { |
10227 | contents = elf_section_data (o)->this_hdr.contents; | |
10228 | if (bed->caches_rawsize | |
10229 | && o->rawsize != 0 | |
10230 | && o->rawsize < o->size) | |
10231 | { | |
10232 | memcpy (flinfo->contents, contents, o->rawsize); | |
10233 | contents = flinfo->contents; | |
10234 | } | |
10235 | } | |
c152c796 AM |
10236 | else |
10237 | { | |
8b127cbc | 10238 | contents = flinfo->contents; |
4a114e3e | 10239 | if (! bfd_get_full_section_contents (input_bfd, o, &contents)) |
c152c796 AM |
10240 | return FALSE; |
10241 | } | |
10242 | ||
10243 | if ((o->flags & SEC_RELOC) != 0) | |
10244 | { | |
10245 | Elf_Internal_Rela *internal_relocs; | |
0f02bbd9 | 10246 | Elf_Internal_Rela *rel, *relend; |
0f02bbd9 | 10247 | int action_discarded; |
ece5ef60 | 10248 | int ret; |
c152c796 AM |
10249 | |
10250 | /* Get the swapped relocs. */ | |
10251 | internal_relocs | |
8b127cbc AM |
10252 | = _bfd_elf_link_read_relocs (input_bfd, o, flinfo->external_relocs, |
10253 | flinfo->internal_relocs, FALSE); | |
c152c796 AM |
10254 | if (internal_relocs == NULL |
10255 | && o->reloc_count > 0) | |
10256 | return FALSE; | |
10257 | ||
310fd250 L |
10258 | /* We need to reverse-copy input .ctors/.dtors sections if |
10259 | they are placed in .init_array/.finit_array for output. */ | |
10260 | if (o->size > address_size | |
10261 | && ((strncmp (o->name, ".ctors", 6) == 0 | |
10262 | && strcmp (o->output_section->name, | |
10263 | ".init_array") == 0) | |
10264 | || (strncmp (o->name, ".dtors", 6) == 0 | |
10265 | && strcmp (o->output_section->name, | |
10266 | ".fini_array") == 0)) | |
10267 | && (o->name[6] == 0 || o->name[6] == '.')) | |
c152c796 | 10268 | { |
310fd250 L |
10269 | if (o->size != o->reloc_count * address_size) |
10270 | { | |
4eca0228 | 10271 | _bfd_error_handler |
695344c0 | 10272 | /* xgettext:c-format */ |
310fd250 L |
10273 | (_("error: %B: size of section %A is not " |
10274 | "multiple of address size"), | |
10275 | input_bfd, o); | |
10276 | bfd_set_error (bfd_error_on_input); | |
10277 | return FALSE; | |
10278 | } | |
10279 | o->flags |= SEC_ELF_REVERSE_COPY; | |
c152c796 AM |
10280 | } |
10281 | ||
0f02bbd9 | 10282 | action_discarded = -1; |
c152c796 | 10283 | if (!elf_section_ignore_discarded_relocs (o)) |
0f02bbd9 AM |
10284 | action_discarded = (*bed->action_discarded) (o); |
10285 | ||
10286 | /* Run through the relocs evaluating complex reloc symbols and | |
10287 | looking for relocs against symbols from discarded sections | |
10288 | or section symbols from removed link-once sections. | |
10289 | Complain about relocs against discarded sections. Zero | |
10290 | relocs against removed link-once sections. */ | |
10291 | ||
10292 | rel = internal_relocs; | |
10293 | relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
10294 | for ( ; rel < relend; rel++) | |
c152c796 | 10295 | { |
0f02bbd9 AM |
10296 | unsigned long r_symndx = rel->r_info >> r_sym_shift; |
10297 | unsigned int s_type; | |
10298 | asection **ps, *sec; | |
10299 | struct elf_link_hash_entry *h = NULL; | |
10300 | const char *sym_name; | |
c152c796 | 10301 | |
0f02bbd9 AM |
10302 | if (r_symndx == STN_UNDEF) |
10303 | continue; | |
c152c796 | 10304 | |
0f02bbd9 AM |
10305 | if (r_symndx >= locsymcount |
10306 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 10307 | && flinfo->sections[r_symndx] == NULL)) |
0f02bbd9 AM |
10308 | { |
10309 | h = sym_hashes[r_symndx - extsymoff]; | |
ee75fd95 | 10310 | |
0f02bbd9 AM |
10311 | /* Badly formatted input files can contain relocs that |
10312 | reference non-existant symbols. Check here so that | |
10313 | we do not seg fault. */ | |
10314 | if (h == NULL) | |
c152c796 | 10315 | { |
0f02bbd9 | 10316 | char buffer [32]; |
dce669a1 | 10317 | |
0f02bbd9 | 10318 | sprintf_vma (buffer, rel->r_info); |
4eca0228 | 10319 | _bfd_error_handler |
695344c0 | 10320 | /* xgettext:c-format */ |
0f02bbd9 AM |
10321 | (_("error: %B contains a reloc (0x%s) for section %A " |
10322 | "that references a non-existent global symbol"), | |
10323 | input_bfd, o, buffer); | |
10324 | bfd_set_error (bfd_error_bad_value); | |
10325 | return FALSE; | |
10326 | } | |
3b36f7e6 | 10327 | |
0f02bbd9 AM |
10328 | while (h->root.type == bfd_link_hash_indirect |
10329 | || h->root.type == bfd_link_hash_warning) | |
10330 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c152c796 | 10331 | |
0f02bbd9 | 10332 | s_type = h->type; |
cdd3575c | 10333 | |
9e2dec47 | 10334 | /* If a plugin symbol is referenced from a non-IR file, |
ca4be51c AM |
10335 | mark the symbol as undefined. Note that the |
10336 | linker may attach linker created dynamic sections | |
10337 | to the plugin bfd. Symbols defined in linker | |
10338 | created sections are not plugin symbols. */ | |
9e2dec47 L |
10339 | if (h->root.non_ir_ref |
10340 | && (h->root.type == bfd_link_hash_defined | |
10341 | || h->root.type == bfd_link_hash_defweak) | |
10342 | && (h->root.u.def.section->flags | |
10343 | & SEC_LINKER_CREATED) == 0 | |
10344 | && h->root.u.def.section->owner != NULL | |
10345 | && (h->root.u.def.section->owner->flags | |
10346 | & BFD_PLUGIN) != 0) | |
10347 | { | |
10348 | h->root.type = bfd_link_hash_undefined; | |
10349 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
10350 | } | |
10351 | ||
0f02bbd9 AM |
10352 | ps = NULL; |
10353 | if (h->root.type == bfd_link_hash_defined | |
10354 | || h->root.type == bfd_link_hash_defweak) | |
10355 | ps = &h->root.u.def.section; | |
10356 | ||
10357 | sym_name = h->root.root.string; | |
10358 | } | |
10359 | else | |
10360 | { | |
10361 | Elf_Internal_Sym *sym = isymbuf + r_symndx; | |
10362 | ||
10363 | s_type = ELF_ST_TYPE (sym->st_info); | |
8b127cbc | 10364 | ps = &flinfo->sections[r_symndx]; |
0f02bbd9 AM |
10365 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, |
10366 | sym, *ps); | |
10367 | } | |
c152c796 | 10368 | |
c301e700 | 10369 | if ((s_type == STT_RELC || s_type == STT_SRELC) |
0e1862bb | 10370 | && !bfd_link_relocatable (flinfo->info)) |
0f02bbd9 AM |
10371 | { |
10372 | bfd_vma val; | |
10373 | bfd_vma dot = (rel->r_offset | |
10374 | + o->output_offset + o->output_section->vma); | |
10375 | #ifdef DEBUG | |
10376 | printf ("Encountered a complex symbol!"); | |
10377 | printf (" (input_bfd %s, section %s, reloc %ld\n", | |
9ccb8af9 AM |
10378 | input_bfd->filename, o->name, |
10379 | (long) (rel - internal_relocs)); | |
0f02bbd9 AM |
10380 | printf (" symbol: idx %8.8lx, name %s\n", |
10381 | r_symndx, sym_name); | |
10382 | printf (" reloc : info %8.8lx, addr %8.8lx\n", | |
10383 | (unsigned long) rel->r_info, | |
10384 | (unsigned long) rel->r_offset); | |
10385 | #endif | |
8b127cbc | 10386 | if (!eval_symbol (&val, &sym_name, input_bfd, flinfo, dot, |
0f02bbd9 AM |
10387 | isymbuf, locsymcount, s_type == STT_SRELC)) |
10388 | return FALSE; | |
10389 | ||
10390 | /* Symbol evaluated OK. Update to absolute value. */ | |
10391 | set_symbol_value (input_bfd, isymbuf, locsymcount, | |
10392 | r_symndx, val); | |
10393 | continue; | |
10394 | } | |
10395 | ||
10396 | if (action_discarded != -1 && ps != NULL) | |
10397 | { | |
cdd3575c AM |
10398 | /* Complain if the definition comes from a |
10399 | discarded section. */ | |
dbaa2011 | 10400 | if ((sec = *ps) != NULL && discarded_section (sec)) |
cdd3575c | 10401 | { |
cf35638d | 10402 | BFD_ASSERT (r_symndx != STN_UNDEF); |
0f02bbd9 | 10403 | if (action_discarded & COMPLAIN) |
8b127cbc | 10404 | (*flinfo->info->callbacks->einfo) |
695344c0 | 10405 | /* xgettext:c-format */ |
e1fffbe6 | 10406 | (_("%X`%s' referenced in section `%A' of %B: " |
58ac56d0 | 10407 | "defined in discarded section `%A' of %B\n"), |
e1fffbe6 | 10408 | sym_name, o, input_bfd, sec, sec->owner); |
cdd3575c | 10409 | |
87e5235d | 10410 | /* Try to do the best we can to support buggy old |
e0ae6d6f | 10411 | versions of gcc. Pretend that the symbol is |
87e5235d AM |
10412 | really defined in the kept linkonce section. |
10413 | FIXME: This is quite broken. Modifying the | |
10414 | symbol here means we will be changing all later | |
e0ae6d6f | 10415 | uses of the symbol, not just in this section. */ |
0f02bbd9 | 10416 | if (action_discarded & PRETEND) |
87e5235d | 10417 | { |
01b3c8ab L |
10418 | asection *kept; |
10419 | ||
c0f00686 | 10420 | kept = _bfd_elf_check_kept_section (sec, |
8b127cbc | 10421 | flinfo->info); |
01b3c8ab | 10422 | if (kept != NULL) |
87e5235d AM |
10423 | { |
10424 | *ps = kept; | |
10425 | continue; | |
10426 | } | |
10427 | } | |
c152c796 AM |
10428 | } |
10429 | } | |
10430 | } | |
10431 | ||
10432 | /* Relocate the section by invoking a back end routine. | |
10433 | ||
10434 | The back end routine is responsible for adjusting the | |
10435 | section contents as necessary, and (if using Rela relocs | |
10436 | and generating a relocatable output file) adjusting the | |
10437 | reloc addend as necessary. | |
10438 | ||
10439 | The back end routine does not have to worry about setting | |
10440 | the reloc address or the reloc symbol index. | |
10441 | ||
10442 | The back end routine is given a pointer to the swapped in | |
10443 | internal symbols, and can access the hash table entries | |
10444 | for the external symbols via elf_sym_hashes (input_bfd). | |
10445 | ||
10446 | When generating relocatable output, the back end routine | |
10447 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
10448 | output symbol is going to be a section symbol | |
10449 | corresponding to the output section, which will require | |
10450 | the addend to be adjusted. */ | |
10451 | ||
8b127cbc | 10452 | ret = (*relocate_section) (output_bfd, flinfo->info, |
c152c796 AM |
10453 | input_bfd, o, contents, |
10454 | internal_relocs, | |
10455 | isymbuf, | |
8b127cbc | 10456 | flinfo->sections); |
ece5ef60 | 10457 | if (!ret) |
c152c796 AM |
10458 | return FALSE; |
10459 | ||
ece5ef60 | 10460 | if (ret == 2 |
0e1862bb | 10461 | || bfd_link_relocatable (flinfo->info) |
8b127cbc | 10462 | || flinfo->info->emitrelocations) |
c152c796 AM |
10463 | { |
10464 | Elf_Internal_Rela *irela; | |
d4730f92 | 10465 | Elf_Internal_Rela *irelaend, *irelamid; |
c152c796 AM |
10466 | bfd_vma last_offset; |
10467 | struct elf_link_hash_entry **rel_hash; | |
d4730f92 BS |
10468 | struct elf_link_hash_entry **rel_hash_list, **rela_hash_list; |
10469 | Elf_Internal_Shdr *input_rel_hdr, *input_rela_hdr; | |
c152c796 | 10470 | unsigned int next_erel; |
c152c796 | 10471 | bfd_boolean rela_normal; |
d4730f92 | 10472 | struct bfd_elf_section_data *esdi, *esdo; |
c152c796 | 10473 | |
d4730f92 BS |
10474 | esdi = elf_section_data (o); |
10475 | esdo = elf_section_data (o->output_section); | |
10476 | rela_normal = FALSE; | |
c152c796 AM |
10477 | |
10478 | /* Adjust the reloc addresses and symbol indices. */ | |
10479 | ||
10480 | irela = internal_relocs; | |
10481 | irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
d4730f92 BS |
10482 | rel_hash = esdo->rel.hashes + esdo->rel.count; |
10483 | /* We start processing the REL relocs, if any. When we reach | |
10484 | IRELAMID in the loop, we switch to the RELA relocs. */ | |
10485 | irelamid = irela; | |
10486 | if (esdi->rel.hdr != NULL) | |
10487 | irelamid += (NUM_SHDR_ENTRIES (esdi->rel.hdr) | |
10488 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 10489 | rel_hash_list = rel_hash; |
d4730f92 | 10490 | rela_hash_list = NULL; |
c152c796 | 10491 | last_offset = o->output_offset; |
0e1862bb | 10492 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10493 | last_offset += o->output_section->vma; |
10494 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) | |
10495 | { | |
10496 | unsigned long r_symndx; | |
10497 | asection *sec; | |
10498 | Elf_Internal_Sym sym; | |
10499 | ||
10500 | if (next_erel == bed->s->int_rels_per_ext_rel) | |
10501 | { | |
10502 | rel_hash++; | |
10503 | next_erel = 0; | |
10504 | } | |
10505 | ||
d4730f92 BS |
10506 | if (irela == irelamid) |
10507 | { | |
10508 | rel_hash = esdo->rela.hashes + esdo->rela.count; | |
10509 | rela_hash_list = rel_hash; | |
10510 | rela_normal = bed->rela_normal; | |
10511 | } | |
10512 | ||
c152c796 | 10513 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
8b127cbc | 10514 | flinfo->info, o, |
c152c796 AM |
10515 | irela->r_offset); |
10516 | if (irela->r_offset >= (bfd_vma) -2) | |
10517 | { | |
10518 | /* This is a reloc for a deleted entry or somesuch. | |
10519 | Turn it into an R_*_NONE reloc, at the same | |
10520 | offset as the last reloc. elf_eh_frame.c and | |
e460dd0d | 10521 | bfd_elf_discard_info rely on reloc offsets |
c152c796 AM |
10522 | being ordered. */ |
10523 | irela->r_offset = last_offset; | |
10524 | irela->r_info = 0; | |
10525 | irela->r_addend = 0; | |
10526 | continue; | |
10527 | } | |
10528 | ||
10529 | irela->r_offset += o->output_offset; | |
10530 | ||
10531 | /* Relocs in an executable have to be virtual addresses. */ | |
0e1862bb | 10532 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10533 | irela->r_offset += o->output_section->vma; |
10534 | ||
10535 | last_offset = irela->r_offset; | |
10536 | ||
10537 | r_symndx = irela->r_info >> r_sym_shift; | |
10538 | if (r_symndx == STN_UNDEF) | |
10539 | continue; | |
10540 | ||
10541 | if (r_symndx >= locsymcount | |
10542 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 10543 | && flinfo->sections[r_symndx] == NULL)) |
c152c796 AM |
10544 | { |
10545 | struct elf_link_hash_entry *rh; | |
10546 | unsigned long indx; | |
10547 | ||
10548 | /* This is a reloc against a global symbol. We | |
10549 | have not yet output all the local symbols, so | |
10550 | we do not know the symbol index of any global | |
10551 | symbol. We set the rel_hash entry for this | |
10552 | reloc to point to the global hash table entry | |
10553 | for this symbol. The symbol index is then | |
ee75fd95 | 10554 | set at the end of bfd_elf_final_link. */ |
c152c796 AM |
10555 | indx = r_symndx - extsymoff; |
10556 | rh = elf_sym_hashes (input_bfd)[indx]; | |
10557 | while (rh->root.type == bfd_link_hash_indirect | |
10558 | || rh->root.type == bfd_link_hash_warning) | |
10559 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
10560 | ||
10561 | /* Setting the index to -2 tells | |
10562 | elf_link_output_extsym that this symbol is | |
10563 | used by a reloc. */ | |
10564 | BFD_ASSERT (rh->indx < 0); | |
10565 | rh->indx = -2; | |
10566 | ||
10567 | *rel_hash = rh; | |
10568 | ||
10569 | continue; | |
10570 | } | |
10571 | ||
10572 | /* This is a reloc against a local symbol. */ | |
10573 | ||
10574 | *rel_hash = NULL; | |
10575 | sym = isymbuf[r_symndx]; | |
8b127cbc | 10576 | sec = flinfo->sections[r_symndx]; |
c152c796 AM |
10577 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
10578 | { | |
10579 | /* I suppose the backend ought to fill in the | |
10580 | section of any STT_SECTION symbol against a | |
6a8d1586 | 10581 | processor specific section. */ |
cf35638d | 10582 | r_symndx = STN_UNDEF; |
6a8d1586 AM |
10583 | if (bfd_is_abs_section (sec)) |
10584 | ; | |
c152c796 AM |
10585 | else if (sec == NULL || sec->owner == NULL) |
10586 | { | |
10587 | bfd_set_error (bfd_error_bad_value); | |
10588 | return FALSE; | |
10589 | } | |
10590 | else | |
10591 | { | |
6a8d1586 AM |
10592 | asection *osec = sec->output_section; |
10593 | ||
10594 | /* If we have discarded a section, the output | |
10595 | section will be the absolute section. In | |
ab96bf03 AM |
10596 | case of discarded SEC_MERGE sections, use |
10597 | the kept section. relocate_section should | |
10598 | have already handled discarded linkonce | |
10599 | sections. */ | |
6a8d1586 AM |
10600 | if (bfd_is_abs_section (osec) |
10601 | && sec->kept_section != NULL | |
10602 | && sec->kept_section->output_section != NULL) | |
10603 | { | |
10604 | osec = sec->kept_section->output_section; | |
10605 | irela->r_addend -= osec->vma; | |
10606 | } | |
10607 | ||
10608 | if (!bfd_is_abs_section (osec)) | |
10609 | { | |
10610 | r_symndx = osec->target_index; | |
cf35638d | 10611 | if (r_symndx == STN_UNDEF) |
74541ad4 | 10612 | { |
051d833a AM |
10613 | irela->r_addend += osec->vma; |
10614 | osec = _bfd_nearby_section (output_bfd, osec, | |
10615 | osec->vma); | |
10616 | irela->r_addend -= osec->vma; | |
10617 | r_symndx = osec->target_index; | |
74541ad4 | 10618 | } |
6a8d1586 | 10619 | } |
c152c796 AM |
10620 | } |
10621 | ||
10622 | /* Adjust the addend according to where the | |
10623 | section winds up in the output section. */ | |
10624 | if (rela_normal) | |
10625 | irela->r_addend += sec->output_offset; | |
10626 | } | |
10627 | else | |
10628 | { | |
8b127cbc | 10629 | if (flinfo->indices[r_symndx] == -1) |
c152c796 AM |
10630 | { |
10631 | unsigned long shlink; | |
10632 | const char *name; | |
10633 | asection *osec; | |
6e0b88f1 | 10634 | long indx; |
c152c796 | 10635 | |
8b127cbc | 10636 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
10637 | { |
10638 | /* You can't do ld -r -s. */ | |
10639 | bfd_set_error (bfd_error_invalid_operation); | |
10640 | return FALSE; | |
10641 | } | |
10642 | ||
10643 | /* This symbol was skipped earlier, but | |
10644 | since it is needed by a reloc, we | |
10645 | must output it now. */ | |
10646 | shlink = symtab_hdr->sh_link; | |
10647 | name = (bfd_elf_string_from_elf_section | |
10648 | (input_bfd, shlink, sym.st_name)); | |
10649 | if (name == NULL) | |
10650 | return FALSE; | |
10651 | ||
10652 | osec = sec->output_section; | |
10653 | sym.st_shndx = | |
10654 | _bfd_elf_section_from_bfd_section (output_bfd, | |
10655 | osec); | |
10656 | if (sym.st_shndx == SHN_BAD) | |
10657 | return FALSE; | |
10658 | ||
10659 | sym.st_value += sec->output_offset; | |
0e1862bb | 10660 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10661 | { |
10662 | sym.st_value += osec->vma; | |
10663 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
10664 | { | |
10665 | /* STT_TLS symbols are relative to PT_TLS | |
10666 | segment base. */ | |
8b127cbc | 10667 | BFD_ASSERT (elf_hash_table (flinfo->info) |
c152c796 | 10668 | ->tls_sec != NULL); |
8b127cbc | 10669 | sym.st_value -= (elf_hash_table (flinfo->info) |
c152c796 AM |
10670 | ->tls_sec->vma); |
10671 | } | |
10672 | } | |
10673 | ||
6e0b88f1 | 10674 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
10675 | ret = elf_link_output_symstrtab (flinfo, name, |
10676 | &sym, sec, | |
10677 | NULL); | |
6e0b88f1 | 10678 | if (ret == 0) |
c152c796 | 10679 | return FALSE; |
6e0b88f1 | 10680 | else if (ret == 1) |
8b127cbc | 10681 | flinfo->indices[r_symndx] = indx; |
6e0b88f1 AM |
10682 | else |
10683 | abort (); | |
c152c796 AM |
10684 | } |
10685 | ||
8b127cbc | 10686 | r_symndx = flinfo->indices[r_symndx]; |
c152c796 AM |
10687 | } |
10688 | ||
10689 | irela->r_info = ((bfd_vma) r_symndx << r_sym_shift | |
10690 | | (irela->r_info & r_type_mask)); | |
10691 | } | |
10692 | ||
10693 | /* Swap out the relocs. */ | |
d4730f92 BS |
10694 | input_rel_hdr = esdi->rel.hdr; |
10695 | if (input_rel_hdr && input_rel_hdr->sh_size != 0) | |
c152c796 | 10696 | { |
d4730f92 BS |
10697 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
10698 | input_rel_hdr, | |
10699 | internal_relocs, | |
10700 | rel_hash_list)) | |
10701 | return FALSE; | |
c152c796 AM |
10702 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) |
10703 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 10704 | rel_hash_list += NUM_SHDR_ENTRIES (input_rel_hdr); |
d4730f92 BS |
10705 | } |
10706 | ||
10707 | input_rela_hdr = esdi->rela.hdr; | |
10708 | if (input_rela_hdr && input_rela_hdr->sh_size != 0) | |
10709 | { | |
eac338cf | 10710 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
d4730f92 | 10711 | input_rela_hdr, |
eac338cf | 10712 | internal_relocs, |
d4730f92 | 10713 | rela_hash_list)) |
c152c796 AM |
10714 | return FALSE; |
10715 | } | |
10716 | } | |
10717 | } | |
10718 | ||
10719 | /* Write out the modified section contents. */ | |
10720 | if (bed->elf_backend_write_section | |
8b127cbc | 10721 | && (*bed->elf_backend_write_section) (output_bfd, flinfo->info, o, |
c7b8f16e | 10722 | contents)) |
c152c796 AM |
10723 | { |
10724 | /* Section written out. */ | |
10725 | } | |
10726 | else switch (o->sec_info_type) | |
10727 | { | |
dbaa2011 | 10728 | case SEC_INFO_TYPE_STABS: |
c152c796 AM |
10729 | if (! (_bfd_write_section_stabs |
10730 | (output_bfd, | |
8b127cbc | 10731 | &elf_hash_table (flinfo->info)->stab_info, |
c152c796 AM |
10732 | o, &elf_section_data (o)->sec_info, contents))) |
10733 | return FALSE; | |
10734 | break; | |
dbaa2011 | 10735 | case SEC_INFO_TYPE_MERGE: |
c152c796 AM |
10736 | if (! _bfd_write_merged_section (output_bfd, o, |
10737 | elf_section_data (o)->sec_info)) | |
10738 | return FALSE; | |
10739 | break; | |
dbaa2011 | 10740 | case SEC_INFO_TYPE_EH_FRAME: |
c152c796 | 10741 | { |
8b127cbc | 10742 | if (! _bfd_elf_write_section_eh_frame (output_bfd, flinfo->info, |
c152c796 AM |
10743 | o, contents)) |
10744 | return FALSE; | |
10745 | } | |
10746 | break; | |
2f0c68f2 CM |
10747 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
10748 | { | |
10749 | if (! _bfd_elf_write_section_eh_frame_entry (output_bfd, | |
10750 | flinfo->info, | |
10751 | o, contents)) | |
10752 | return FALSE; | |
10753 | } | |
10754 | break; | |
c152c796 AM |
10755 | default: |
10756 | { | |
310fd250 L |
10757 | if (! (o->flags & SEC_EXCLUDE)) |
10758 | { | |
10759 | file_ptr offset = (file_ptr) o->output_offset; | |
10760 | bfd_size_type todo = o->size; | |
37b01f6a DG |
10761 | |
10762 | offset *= bfd_octets_per_byte (output_bfd); | |
10763 | ||
310fd250 L |
10764 | if ((o->flags & SEC_ELF_REVERSE_COPY)) |
10765 | { | |
10766 | /* Reverse-copy input section to output. */ | |
10767 | do | |
10768 | { | |
10769 | todo -= address_size; | |
10770 | if (! bfd_set_section_contents (output_bfd, | |
10771 | o->output_section, | |
10772 | contents + todo, | |
10773 | offset, | |
10774 | address_size)) | |
10775 | return FALSE; | |
10776 | if (todo == 0) | |
10777 | break; | |
10778 | offset += address_size; | |
10779 | } | |
10780 | while (1); | |
10781 | } | |
10782 | else if (! bfd_set_section_contents (output_bfd, | |
10783 | o->output_section, | |
10784 | contents, | |
10785 | offset, todo)) | |
10786 | return FALSE; | |
10787 | } | |
c152c796 AM |
10788 | } |
10789 | break; | |
10790 | } | |
10791 | } | |
10792 | ||
10793 | return TRUE; | |
10794 | } | |
10795 | ||
10796 | /* Generate a reloc when linking an ELF file. This is a reloc | |
3a800eb9 | 10797 | requested by the linker, and does not come from any input file. This |
c152c796 AM |
10798 | is used to build constructor and destructor tables when linking |
10799 | with -Ur. */ | |
10800 | ||
10801 | static bfd_boolean | |
10802 | elf_reloc_link_order (bfd *output_bfd, | |
10803 | struct bfd_link_info *info, | |
10804 | asection *output_section, | |
10805 | struct bfd_link_order *link_order) | |
10806 | { | |
10807 | reloc_howto_type *howto; | |
10808 | long indx; | |
10809 | bfd_vma offset; | |
10810 | bfd_vma addend; | |
d4730f92 | 10811 | struct bfd_elf_section_reloc_data *reldata; |
c152c796 AM |
10812 | struct elf_link_hash_entry **rel_hash_ptr; |
10813 | Elf_Internal_Shdr *rel_hdr; | |
10814 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
10815 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; | |
10816 | bfd_byte *erel; | |
10817 | unsigned int i; | |
d4730f92 | 10818 | struct bfd_elf_section_data *esdo = elf_section_data (output_section); |
c152c796 AM |
10819 | |
10820 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
10821 | if (howto == NULL) | |
10822 | { | |
10823 | bfd_set_error (bfd_error_bad_value); | |
10824 | return FALSE; | |
10825 | } | |
10826 | ||
10827 | addend = link_order->u.reloc.p->addend; | |
10828 | ||
d4730f92 BS |
10829 | if (esdo->rel.hdr) |
10830 | reldata = &esdo->rel; | |
10831 | else if (esdo->rela.hdr) | |
10832 | reldata = &esdo->rela; | |
10833 | else | |
10834 | { | |
10835 | reldata = NULL; | |
10836 | BFD_ASSERT (0); | |
10837 | } | |
10838 | ||
c152c796 | 10839 | /* Figure out the symbol index. */ |
d4730f92 | 10840 | rel_hash_ptr = reldata->hashes + reldata->count; |
c152c796 AM |
10841 | if (link_order->type == bfd_section_reloc_link_order) |
10842 | { | |
10843 | indx = link_order->u.reloc.p->u.section->target_index; | |
10844 | BFD_ASSERT (indx != 0); | |
10845 | *rel_hash_ptr = NULL; | |
10846 | } | |
10847 | else | |
10848 | { | |
10849 | struct elf_link_hash_entry *h; | |
10850 | ||
10851 | /* Treat a reloc against a defined symbol as though it were | |
10852 | actually against the section. */ | |
10853 | h = ((struct elf_link_hash_entry *) | |
10854 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
10855 | link_order->u.reloc.p->u.name, | |
10856 | FALSE, FALSE, TRUE)); | |
10857 | if (h != NULL | |
10858 | && (h->root.type == bfd_link_hash_defined | |
10859 | || h->root.type == bfd_link_hash_defweak)) | |
10860 | { | |
10861 | asection *section; | |
10862 | ||
10863 | section = h->root.u.def.section; | |
10864 | indx = section->output_section->target_index; | |
10865 | *rel_hash_ptr = NULL; | |
10866 | /* It seems that we ought to add the symbol value to the | |
10867 | addend here, but in practice it has already been added | |
10868 | because it was passed to constructor_callback. */ | |
10869 | addend += section->output_section->vma + section->output_offset; | |
10870 | } | |
10871 | else if (h != NULL) | |
10872 | { | |
10873 | /* Setting the index to -2 tells elf_link_output_extsym that | |
10874 | this symbol is used by a reloc. */ | |
10875 | h->indx = -2; | |
10876 | *rel_hash_ptr = h; | |
10877 | indx = 0; | |
10878 | } | |
10879 | else | |
10880 | { | |
1a72702b AM |
10881 | (*info->callbacks->unattached_reloc) |
10882 | (info, link_order->u.reloc.p->u.name, NULL, NULL, 0); | |
c152c796 AM |
10883 | indx = 0; |
10884 | } | |
10885 | } | |
10886 | ||
10887 | /* If this is an inplace reloc, we must write the addend into the | |
10888 | object file. */ | |
10889 | if (howto->partial_inplace && addend != 0) | |
10890 | { | |
10891 | bfd_size_type size; | |
10892 | bfd_reloc_status_type rstat; | |
10893 | bfd_byte *buf; | |
10894 | bfd_boolean ok; | |
10895 | const char *sym_name; | |
10896 | ||
a50b1753 NC |
10897 | size = (bfd_size_type) bfd_get_reloc_size (howto); |
10898 | buf = (bfd_byte *) bfd_zmalloc (size); | |
6346d5ca | 10899 | if (buf == NULL && size != 0) |
c152c796 AM |
10900 | return FALSE; |
10901 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); | |
10902 | switch (rstat) | |
10903 | { | |
10904 | case bfd_reloc_ok: | |
10905 | break; | |
10906 | ||
10907 | default: | |
10908 | case bfd_reloc_outofrange: | |
10909 | abort (); | |
10910 | ||
10911 | case bfd_reloc_overflow: | |
10912 | if (link_order->type == bfd_section_reloc_link_order) | |
10913 | sym_name = bfd_section_name (output_bfd, | |
10914 | link_order->u.reloc.p->u.section); | |
10915 | else | |
10916 | sym_name = link_order->u.reloc.p->u.name; | |
1a72702b AM |
10917 | (*info->callbacks->reloc_overflow) (info, NULL, sym_name, |
10918 | howto->name, addend, NULL, NULL, | |
10919 | (bfd_vma) 0); | |
c152c796 AM |
10920 | break; |
10921 | } | |
37b01f6a | 10922 | |
c152c796 | 10923 | ok = bfd_set_section_contents (output_bfd, output_section, buf, |
37b01f6a DG |
10924 | link_order->offset |
10925 | * bfd_octets_per_byte (output_bfd), | |
10926 | size); | |
c152c796 AM |
10927 | free (buf); |
10928 | if (! ok) | |
10929 | return FALSE; | |
10930 | } | |
10931 | ||
10932 | /* The address of a reloc is relative to the section in a | |
10933 | relocatable file, and is a virtual address in an executable | |
10934 | file. */ | |
10935 | offset = link_order->offset; | |
0e1862bb | 10936 | if (! bfd_link_relocatable (info)) |
c152c796 AM |
10937 | offset += output_section->vma; |
10938 | ||
10939 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) | |
10940 | { | |
10941 | irel[i].r_offset = offset; | |
10942 | irel[i].r_info = 0; | |
10943 | irel[i].r_addend = 0; | |
10944 | } | |
10945 | if (bed->s->arch_size == 32) | |
10946 | irel[0].r_info = ELF32_R_INFO (indx, howto->type); | |
10947 | else | |
10948 | irel[0].r_info = ELF64_R_INFO (indx, howto->type); | |
10949 | ||
d4730f92 | 10950 | rel_hdr = reldata->hdr; |
c152c796 AM |
10951 | erel = rel_hdr->contents; |
10952 | if (rel_hdr->sh_type == SHT_REL) | |
10953 | { | |
d4730f92 | 10954 | erel += reldata->count * bed->s->sizeof_rel; |
c152c796 AM |
10955 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); |
10956 | } | |
10957 | else | |
10958 | { | |
10959 | irel[0].r_addend = addend; | |
d4730f92 | 10960 | erel += reldata->count * bed->s->sizeof_rela; |
c152c796 AM |
10961 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); |
10962 | } | |
10963 | ||
d4730f92 | 10964 | ++reldata->count; |
c152c796 AM |
10965 | |
10966 | return TRUE; | |
10967 | } | |
10968 | ||
0b52efa6 PB |
10969 | |
10970 | /* Get the output vma of the section pointed to by the sh_link field. */ | |
10971 | ||
10972 | static bfd_vma | |
10973 | elf_get_linked_section_vma (struct bfd_link_order *p) | |
10974 | { | |
10975 | Elf_Internal_Shdr **elf_shdrp; | |
10976 | asection *s; | |
10977 | int elfsec; | |
10978 | ||
10979 | s = p->u.indirect.section; | |
10980 | elf_shdrp = elf_elfsections (s->owner); | |
10981 | elfsec = _bfd_elf_section_from_bfd_section (s->owner, s); | |
10982 | elfsec = elf_shdrp[elfsec]->sh_link; | |
185d09ad L |
10983 | /* PR 290: |
10984 | The Intel C compiler generates SHT_IA_64_UNWIND with | |
e04bcc6d | 10985 | SHF_LINK_ORDER. But it doesn't set the sh_link or |
185d09ad L |
10986 | sh_info fields. Hence we could get the situation |
10987 | where elfsec is 0. */ | |
10988 | if (elfsec == 0) | |
10989 | { | |
10990 | const struct elf_backend_data *bed | |
10991 | = get_elf_backend_data (s->owner); | |
10992 | if (bed->link_order_error_handler) | |
d003868e | 10993 | bed->link_order_error_handler |
695344c0 | 10994 | /* xgettext:c-format */ |
d003868e | 10995 | (_("%B: warning: sh_link not set for section `%A'"), s->owner, s); |
185d09ad L |
10996 | return 0; |
10997 | } | |
10998 | else | |
10999 | { | |
11000 | s = elf_shdrp[elfsec]->bfd_section; | |
11001 | return s->output_section->vma + s->output_offset; | |
11002 | } | |
0b52efa6 PB |
11003 | } |
11004 | ||
11005 | ||
11006 | /* Compare two sections based on the locations of the sections they are | |
11007 | linked to. Used by elf_fixup_link_order. */ | |
11008 | ||
11009 | static int | |
11010 | compare_link_order (const void * a, const void * b) | |
11011 | { | |
11012 | bfd_vma apos; | |
11013 | bfd_vma bpos; | |
11014 | ||
11015 | apos = elf_get_linked_section_vma (*(struct bfd_link_order **)a); | |
11016 | bpos = elf_get_linked_section_vma (*(struct bfd_link_order **)b); | |
11017 | if (apos < bpos) | |
11018 | return -1; | |
11019 | return apos > bpos; | |
11020 | } | |
11021 | ||
11022 | ||
11023 | /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same | |
11024 | order as their linked sections. Returns false if this could not be done | |
11025 | because an output section includes both ordered and unordered | |
11026 | sections. Ideally we'd do this in the linker proper. */ | |
11027 | ||
11028 | static bfd_boolean | |
11029 | elf_fixup_link_order (bfd *abfd, asection *o) | |
11030 | { | |
11031 | int seen_linkorder; | |
11032 | int seen_other; | |
11033 | int n; | |
11034 | struct bfd_link_order *p; | |
11035 | bfd *sub; | |
11036 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
b761a207 | 11037 | unsigned elfsec; |
0b52efa6 | 11038 | struct bfd_link_order **sections; |
d33cdfe3 | 11039 | asection *s, *other_sec, *linkorder_sec; |
0b52efa6 | 11040 | bfd_vma offset; |
3b36f7e6 | 11041 | |
d33cdfe3 L |
11042 | other_sec = NULL; |
11043 | linkorder_sec = NULL; | |
0b52efa6 PB |
11044 | seen_other = 0; |
11045 | seen_linkorder = 0; | |
8423293d | 11046 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
0b52efa6 | 11047 | { |
d33cdfe3 | 11048 | if (p->type == bfd_indirect_link_order) |
0b52efa6 PB |
11049 | { |
11050 | s = p->u.indirect.section; | |
d33cdfe3 L |
11051 | sub = s->owner; |
11052 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour | |
11053 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass | |
b761a207 BE |
11054 | && (elfsec = _bfd_elf_section_from_bfd_section (sub, s)) |
11055 | && elfsec < elf_numsections (sub) | |
4fbb74a6 AM |
11056 | && elf_elfsections (sub)[elfsec]->sh_flags & SHF_LINK_ORDER |
11057 | && elf_elfsections (sub)[elfsec]->sh_link < elf_numsections (sub)) | |
d33cdfe3 L |
11058 | { |
11059 | seen_linkorder++; | |
11060 | linkorder_sec = s; | |
11061 | } | |
0b52efa6 | 11062 | else |
d33cdfe3 L |
11063 | { |
11064 | seen_other++; | |
11065 | other_sec = s; | |
11066 | } | |
0b52efa6 PB |
11067 | } |
11068 | else | |
11069 | seen_other++; | |
d33cdfe3 L |
11070 | |
11071 | if (seen_other && seen_linkorder) | |
11072 | { | |
11073 | if (other_sec && linkorder_sec) | |
4eca0228 | 11074 | _bfd_error_handler |
695344c0 | 11075 | /* xgettext:c-format */ |
4eca0228 AM |
11076 | (_("%A has both ordered [`%A' in %B] " |
11077 | "and unordered [`%A' in %B] sections"), | |
11078 | o, linkorder_sec, | |
11079 | linkorder_sec->owner, other_sec, | |
11080 | other_sec->owner); | |
d33cdfe3 | 11081 | else |
4eca0228 AM |
11082 | _bfd_error_handler |
11083 | (_("%A has both ordered and unordered sections"), o); | |
d33cdfe3 L |
11084 | bfd_set_error (bfd_error_bad_value); |
11085 | return FALSE; | |
11086 | } | |
0b52efa6 PB |
11087 | } |
11088 | ||
11089 | if (!seen_linkorder) | |
11090 | return TRUE; | |
11091 | ||
0b52efa6 | 11092 | sections = (struct bfd_link_order **) |
14b1c01e AM |
11093 | bfd_malloc (seen_linkorder * sizeof (struct bfd_link_order *)); |
11094 | if (sections == NULL) | |
11095 | return FALSE; | |
0b52efa6 | 11096 | seen_linkorder = 0; |
3b36f7e6 | 11097 | |
8423293d | 11098 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
0b52efa6 PB |
11099 | { |
11100 | sections[seen_linkorder++] = p; | |
11101 | } | |
11102 | /* Sort the input sections in the order of their linked section. */ | |
11103 | qsort (sections, seen_linkorder, sizeof (struct bfd_link_order *), | |
11104 | compare_link_order); | |
11105 | ||
11106 | /* Change the offsets of the sections. */ | |
11107 | offset = 0; | |
11108 | for (n = 0; n < seen_linkorder; n++) | |
11109 | { | |
11110 | s = sections[n]->u.indirect.section; | |
461686a3 | 11111 | offset &= ~(bfd_vma) 0 << s->alignment_power; |
37b01f6a | 11112 | s->output_offset = offset / bfd_octets_per_byte (abfd); |
0b52efa6 PB |
11113 | sections[n]->offset = offset; |
11114 | offset += sections[n]->size; | |
11115 | } | |
11116 | ||
4dd07732 | 11117 | free (sections); |
0b52efa6 PB |
11118 | return TRUE; |
11119 | } | |
11120 | ||
76359541 TP |
11121 | /* Generate an import library in INFO->implib_bfd from symbols in ABFD. |
11122 | Returns TRUE upon success, FALSE otherwise. */ | |
11123 | ||
11124 | static bfd_boolean | |
11125 | elf_output_implib (bfd *abfd, struct bfd_link_info *info) | |
11126 | { | |
11127 | bfd_boolean ret = FALSE; | |
11128 | bfd *implib_bfd; | |
11129 | const struct elf_backend_data *bed; | |
11130 | flagword flags; | |
11131 | enum bfd_architecture arch; | |
11132 | unsigned int mach; | |
11133 | asymbol **sympp = NULL; | |
11134 | long symsize; | |
11135 | long symcount; | |
11136 | long src_count; | |
11137 | elf_symbol_type *osymbuf; | |
11138 | ||
11139 | implib_bfd = info->out_implib_bfd; | |
11140 | bed = get_elf_backend_data (abfd); | |
11141 | ||
11142 | if (!bfd_set_format (implib_bfd, bfd_object)) | |
11143 | return FALSE; | |
11144 | ||
11145 | flags = bfd_get_file_flags (abfd); | |
11146 | flags &= ~HAS_RELOC; | |
11147 | if (!bfd_set_start_address (implib_bfd, 0) | |
11148 | || !bfd_set_file_flags (implib_bfd, flags)) | |
11149 | return FALSE; | |
11150 | ||
11151 | /* Copy architecture of output file to import library file. */ | |
11152 | arch = bfd_get_arch (abfd); | |
11153 | mach = bfd_get_mach (abfd); | |
11154 | if (!bfd_set_arch_mach (implib_bfd, arch, mach) | |
11155 | && (abfd->target_defaulted | |
11156 | || bfd_get_arch (abfd) != bfd_get_arch (implib_bfd))) | |
11157 | return FALSE; | |
11158 | ||
11159 | /* Get symbol table size. */ | |
11160 | symsize = bfd_get_symtab_upper_bound (abfd); | |
11161 | if (symsize < 0) | |
11162 | return FALSE; | |
11163 | ||
11164 | /* Read in the symbol table. */ | |
11165 | sympp = (asymbol **) xmalloc (symsize); | |
11166 | symcount = bfd_canonicalize_symtab (abfd, sympp); | |
11167 | if (symcount < 0) | |
11168 | goto free_sym_buf; | |
11169 | ||
11170 | /* Allow the BFD backend to copy any private header data it | |
11171 | understands from the output BFD to the import library BFD. */ | |
11172 | if (! bfd_copy_private_header_data (abfd, implib_bfd)) | |
11173 | goto free_sym_buf; | |
11174 | ||
11175 | /* Filter symbols to appear in the import library. */ | |
11176 | if (bed->elf_backend_filter_implib_symbols) | |
11177 | symcount = bed->elf_backend_filter_implib_symbols (abfd, info, sympp, | |
11178 | symcount); | |
11179 | else | |
11180 | symcount = _bfd_elf_filter_global_symbols (abfd, info, sympp, symcount); | |
11181 | if (symcount == 0) | |
11182 | { | |
5df1bc57 | 11183 | bfd_set_error (bfd_error_no_symbols); |
4eca0228 AM |
11184 | _bfd_error_handler (_("%B: no symbol found for import library"), |
11185 | implib_bfd); | |
76359541 TP |
11186 | goto free_sym_buf; |
11187 | } | |
11188 | ||
11189 | ||
11190 | /* Make symbols absolute. */ | |
11191 | osymbuf = (elf_symbol_type *) bfd_alloc2 (implib_bfd, symcount, | |
11192 | sizeof (*osymbuf)); | |
11193 | for (src_count = 0; src_count < symcount; src_count++) | |
11194 | { | |
11195 | memcpy (&osymbuf[src_count], (elf_symbol_type *) sympp[src_count], | |
11196 | sizeof (*osymbuf)); | |
11197 | osymbuf[src_count].symbol.section = bfd_abs_section_ptr; | |
11198 | osymbuf[src_count].internal_elf_sym.st_shndx = SHN_ABS; | |
11199 | osymbuf[src_count].symbol.value += sympp[src_count]->section->vma; | |
11200 | osymbuf[src_count].internal_elf_sym.st_value = | |
11201 | osymbuf[src_count].symbol.value; | |
11202 | sympp[src_count] = &osymbuf[src_count].symbol; | |
11203 | } | |
11204 | ||
11205 | bfd_set_symtab (implib_bfd, sympp, symcount); | |
11206 | ||
11207 | /* Allow the BFD backend to copy any private data it understands | |
11208 | from the output BFD to the import library BFD. This is done last | |
11209 | to permit the routine to look at the filtered symbol table. */ | |
11210 | if (! bfd_copy_private_bfd_data (abfd, implib_bfd)) | |
11211 | goto free_sym_buf; | |
11212 | ||
11213 | if (!bfd_close (implib_bfd)) | |
11214 | goto free_sym_buf; | |
11215 | ||
11216 | ret = TRUE; | |
11217 | ||
11218 | free_sym_buf: | |
11219 | free (sympp); | |
11220 | return ret; | |
11221 | } | |
11222 | ||
9f7c3e5e AM |
11223 | static void |
11224 | elf_final_link_free (bfd *obfd, struct elf_final_link_info *flinfo) | |
11225 | { | |
11226 | asection *o; | |
11227 | ||
11228 | if (flinfo->symstrtab != NULL) | |
ef10c3ac | 11229 | _bfd_elf_strtab_free (flinfo->symstrtab); |
9f7c3e5e AM |
11230 | if (flinfo->contents != NULL) |
11231 | free (flinfo->contents); | |
11232 | if (flinfo->external_relocs != NULL) | |
11233 | free (flinfo->external_relocs); | |
11234 | if (flinfo->internal_relocs != NULL) | |
11235 | free (flinfo->internal_relocs); | |
11236 | if (flinfo->external_syms != NULL) | |
11237 | free (flinfo->external_syms); | |
11238 | if (flinfo->locsym_shndx != NULL) | |
11239 | free (flinfo->locsym_shndx); | |
11240 | if (flinfo->internal_syms != NULL) | |
11241 | free (flinfo->internal_syms); | |
11242 | if (flinfo->indices != NULL) | |
11243 | free (flinfo->indices); | |
11244 | if (flinfo->sections != NULL) | |
11245 | free (flinfo->sections); | |
9f7c3e5e AM |
11246 | if (flinfo->symshndxbuf != NULL) |
11247 | free (flinfo->symshndxbuf); | |
11248 | for (o = obfd->sections; o != NULL; o = o->next) | |
11249 | { | |
11250 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
11251 | if ((o->flags & SEC_RELOC) != 0 && esdo->rel.hashes != NULL) | |
11252 | free (esdo->rel.hashes); | |
11253 | if ((o->flags & SEC_RELOC) != 0 && esdo->rela.hashes != NULL) | |
11254 | free (esdo->rela.hashes); | |
11255 | } | |
11256 | } | |
0b52efa6 | 11257 | |
c152c796 AM |
11258 | /* Do the final step of an ELF link. */ |
11259 | ||
11260 | bfd_boolean | |
11261 | bfd_elf_final_link (bfd *abfd, struct bfd_link_info *info) | |
11262 | { | |
11263 | bfd_boolean dynamic; | |
11264 | bfd_boolean emit_relocs; | |
11265 | bfd *dynobj; | |
8b127cbc | 11266 | struct elf_final_link_info flinfo; |
91d6fa6a NC |
11267 | asection *o; |
11268 | struct bfd_link_order *p; | |
11269 | bfd *sub; | |
c152c796 AM |
11270 | bfd_size_type max_contents_size; |
11271 | bfd_size_type max_external_reloc_size; | |
11272 | bfd_size_type max_internal_reloc_count; | |
11273 | bfd_size_type max_sym_count; | |
11274 | bfd_size_type max_sym_shndx_count; | |
c152c796 AM |
11275 | Elf_Internal_Sym elfsym; |
11276 | unsigned int i; | |
11277 | Elf_Internal_Shdr *symtab_hdr; | |
11278 | Elf_Internal_Shdr *symtab_shndx_hdr; | |
c152c796 AM |
11279 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
11280 | struct elf_outext_info eoinfo; | |
11281 | bfd_boolean merged; | |
11282 | size_t relativecount = 0; | |
11283 | asection *reldyn = 0; | |
11284 | bfd_size_type amt; | |
104d59d1 JM |
11285 | asection *attr_section = NULL; |
11286 | bfd_vma attr_size = 0; | |
11287 | const char *std_attrs_section; | |
64f52338 | 11288 | struct elf_link_hash_table *htab = elf_hash_table (info); |
c152c796 | 11289 | |
64f52338 | 11290 | if (!is_elf_hash_table (htab)) |
c152c796 AM |
11291 | return FALSE; |
11292 | ||
0e1862bb | 11293 | if (bfd_link_pic (info)) |
c152c796 AM |
11294 | abfd->flags |= DYNAMIC; |
11295 | ||
64f52338 AM |
11296 | dynamic = htab->dynamic_sections_created; |
11297 | dynobj = htab->dynobj; | |
c152c796 | 11298 | |
0e1862bb | 11299 | emit_relocs = (bfd_link_relocatable (info) |
a4676736 | 11300 | || info->emitrelocations); |
c152c796 | 11301 | |
8b127cbc AM |
11302 | flinfo.info = info; |
11303 | flinfo.output_bfd = abfd; | |
ef10c3ac | 11304 | flinfo.symstrtab = _bfd_elf_strtab_init (); |
8b127cbc | 11305 | if (flinfo.symstrtab == NULL) |
c152c796 AM |
11306 | return FALSE; |
11307 | ||
11308 | if (! dynamic) | |
11309 | { | |
8b127cbc AM |
11310 | flinfo.hash_sec = NULL; |
11311 | flinfo.symver_sec = NULL; | |
c152c796 AM |
11312 | } |
11313 | else | |
11314 | { | |
3d4d4302 | 11315 | flinfo.hash_sec = bfd_get_linker_section (dynobj, ".hash"); |
202e2356 | 11316 | /* Note that dynsym_sec can be NULL (on VMS). */ |
3d4d4302 | 11317 | flinfo.symver_sec = bfd_get_linker_section (dynobj, ".gnu.version"); |
c152c796 AM |
11318 | /* Note that it is OK if symver_sec is NULL. */ |
11319 | } | |
11320 | ||
8b127cbc AM |
11321 | flinfo.contents = NULL; |
11322 | flinfo.external_relocs = NULL; | |
11323 | flinfo.internal_relocs = NULL; | |
11324 | flinfo.external_syms = NULL; | |
11325 | flinfo.locsym_shndx = NULL; | |
11326 | flinfo.internal_syms = NULL; | |
11327 | flinfo.indices = NULL; | |
11328 | flinfo.sections = NULL; | |
8b127cbc | 11329 | flinfo.symshndxbuf = NULL; |
ffbc01cc | 11330 | flinfo.filesym_count = 0; |
c152c796 | 11331 | |
104d59d1 JM |
11332 | /* The object attributes have been merged. Remove the input |
11333 | sections from the link, and set the contents of the output | |
11334 | secton. */ | |
11335 | std_attrs_section = get_elf_backend_data (abfd)->obj_attrs_section; | |
11336 | for (o = abfd->sections; o != NULL; o = o->next) | |
11337 | { | |
11338 | if ((std_attrs_section && strcmp (o->name, std_attrs_section) == 0) | |
11339 | || strcmp (o->name, ".gnu.attributes") == 0) | |
11340 | { | |
11341 | for (p = o->map_head.link_order; p != NULL; p = p->next) | |
11342 | { | |
11343 | asection *input_section; | |
11344 | ||
11345 | if (p->type != bfd_indirect_link_order) | |
11346 | continue; | |
11347 | input_section = p->u.indirect.section; | |
11348 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
11349 | elf_link_input_bfd ignores this section. */ | |
11350 | input_section->flags &= ~SEC_HAS_CONTENTS; | |
11351 | } | |
a0c8462f | 11352 | |
104d59d1 JM |
11353 | attr_size = bfd_elf_obj_attr_size (abfd); |
11354 | if (attr_size) | |
11355 | { | |
11356 | bfd_set_section_size (abfd, o, attr_size); | |
11357 | attr_section = o; | |
11358 | /* Skip this section later on. */ | |
11359 | o->map_head.link_order = NULL; | |
11360 | } | |
11361 | else | |
11362 | o->flags |= SEC_EXCLUDE; | |
11363 | } | |
11364 | } | |
11365 | ||
c152c796 AM |
11366 | /* Count up the number of relocations we will output for each output |
11367 | section, so that we know the sizes of the reloc sections. We | |
11368 | also figure out some maximum sizes. */ | |
11369 | max_contents_size = 0; | |
11370 | max_external_reloc_size = 0; | |
11371 | max_internal_reloc_count = 0; | |
11372 | max_sym_count = 0; | |
11373 | max_sym_shndx_count = 0; | |
11374 | merged = FALSE; | |
11375 | for (o = abfd->sections; o != NULL; o = o->next) | |
11376 | { | |
11377 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
11378 | o->reloc_count = 0; | |
11379 | ||
8423293d | 11380 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
11381 | { |
11382 | unsigned int reloc_count = 0; | |
9eaff861 | 11383 | unsigned int additional_reloc_count = 0; |
c152c796 | 11384 | struct bfd_elf_section_data *esdi = NULL; |
c152c796 AM |
11385 | |
11386 | if (p->type == bfd_section_reloc_link_order | |
11387 | || p->type == bfd_symbol_reloc_link_order) | |
11388 | reloc_count = 1; | |
11389 | else if (p->type == bfd_indirect_link_order) | |
11390 | { | |
11391 | asection *sec; | |
11392 | ||
11393 | sec = p->u.indirect.section; | |
c152c796 AM |
11394 | |
11395 | /* Mark all sections which are to be included in the | |
11396 | link. This will normally be every section. We need | |
11397 | to do this so that we can identify any sections which | |
11398 | the linker has decided to not include. */ | |
11399 | sec->linker_mark = TRUE; | |
11400 | ||
11401 | if (sec->flags & SEC_MERGE) | |
11402 | merged = TRUE; | |
11403 | ||
eea6121a AM |
11404 | if (sec->rawsize > max_contents_size) |
11405 | max_contents_size = sec->rawsize; | |
11406 | if (sec->size > max_contents_size) | |
11407 | max_contents_size = sec->size; | |
c152c796 | 11408 | |
c152c796 AM |
11409 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour |
11410 | && (sec->owner->flags & DYNAMIC) == 0) | |
11411 | { | |
11412 | size_t sym_count; | |
11413 | ||
a961cdd5 AM |
11414 | /* We are interested in just local symbols, not all |
11415 | symbols. */ | |
c152c796 AM |
11416 | if (elf_bad_symtab (sec->owner)) |
11417 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
11418 | / bed->s->sizeof_sym); | |
11419 | else | |
11420 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
11421 | ||
11422 | if (sym_count > max_sym_count) | |
11423 | max_sym_count = sym_count; | |
11424 | ||
11425 | if (sym_count > max_sym_shndx_count | |
6a40cf0c | 11426 | && elf_symtab_shndx_list (sec->owner) != NULL) |
c152c796 AM |
11427 | max_sym_shndx_count = sym_count; |
11428 | ||
a961cdd5 AM |
11429 | if (esdo->this_hdr.sh_type == SHT_REL |
11430 | || esdo->this_hdr.sh_type == SHT_RELA) | |
11431 | /* Some backends use reloc_count in relocation sections | |
11432 | to count particular types of relocs. Of course, | |
11433 | reloc sections themselves can't have relocations. */ | |
11434 | ; | |
11435 | else if (emit_relocs) | |
11436 | { | |
11437 | reloc_count = sec->reloc_count; | |
11438 | if (bed->elf_backend_count_additional_relocs) | |
11439 | { | |
11440 | int c; | |
11441 | c = (*bed->elf_backend_count_additional_relocs) (sec); | |
11442 | additional_reloc_count += c; | |
11443 | } | |
11444 | } | |
11445 | else if (bed->elf_backend_count_relocs) | |
11446 | reloc_count = (*bed->elf_backend_count_relocs) (info, sec); | |
11447 | ||
11448 | esdi = elf_section_data (sec); | |
11449 | ||
c152c796 AM |
11450 | if ((sec->flags & SEC_RELOC) != 0) |
11451 | { | |
d4730f92 | 11452 | size_t ext_size = 0; |
c152c796 | 11453 | |
d4730f92 BS |
11454 | if (esdi->rel.hdr != NULL) |
11455 | ext_size = esdi->rel.hdr->sh_size; | |
11456 | if (esdi->rela.hdr != NULL) | |
11457 | ext_size += esdi->rela.hdr->sh_size; | |
7326c758 | 11458 | |
c152c796 AM |
11459 | if (ext_size > max_external_reloc_size) |
11460 | max_external_reloc_size = ext_size; | |
11461 | if (sec->reloc_count > max_internal_reloc_count) | |
11462 | max_internal_reloc_count = sec->reloc_count; | |
11463 | } | |
11464 | } | |
11465 | } | |
11466 | ||
11467 | if (reloc_count == 0) | |
11468 | continue; | |
11469 | ||
9eaff861 | 11470 | reloc_count += additional_reloc_count; |
c152c796 AM |
11471 | o->reloc_count += reloc_count; |
11472 | ||
0e1862bb | 11473 | if (p->type == bfd_indirect_link_order && emit_relocs) |
c152c796 | 11474 | { |
d4730f92 | 11475 | if (esdi->rel.hdr) |
9eaff861 | 11476 | { |
491d01d3 | 11477 | esdo->rel.count += NUM_SHDR_ENTRIES (esdi->rel.hdr); |
9eaff861 AO |
11478 | esdo->rel.count += additional_reloc_count; |
11479 | } | |
d4730f92 | 11480 | if (esdi->rela.hdr) |
9eaff861 | 11481 | { |
491d01d3 | 11482 | esdo->rela.count += NUM_SHDR_ENTRIES (esdi->rela.hdr); |
9eaff861 AO |
11483 | esdo->rela.count += additional_reloc_count; |
11484 | } | |
d4730f92 BS |
11485 | } |
11486 | else | |
11487 | { | |
11488 | if (o->use_rela_p) | |
11489 | esdo->rela.count += reloc_count; | |
2c2b4ed4 | 11490 | else |
d4730f92 | 11491 | esdo->rel.count += reloc_count; |
c152c796 | 11492 | } |
c152c796 AM |
11493 | } |
11494 | ||
9eaff861 | 11495 | if (o->reloc_count > 0) |
c152c796 AM |
11496 | o->flags |= SEC_RELOC; |
11497 | else | |
11498 | { | |
11499 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
11500 | set it (this is probably a bug) and if it is set | |
11501 | assign_section_numbers will create a reloc section. */ | |
11502 | o->flags &=~ SEC_RELOC; | |
11503 | } | |
11504 | ||
11505 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
11506 | zero. This is done in elf_fake_sections as well, but forcing | |
11507 | the VMA to 0 here will ensure that relocs against these | |
11508 | sections are handled correctly. */ | |
11509 | if ((o->flags & SEC_ALLOC) == 0 | |
11510 | && ! o->user_set_vma) | |
11511 | o->vma = 0; | |
11512 | } | |
11513 | ||
0e1862bb | 11514 | if (! bfd_link_relocatable (info) && merged) |
64f52338 | 11515 | elf_link_hash_traverse (htab, _bfd_elf_link_sec_merge_syms, abfd); |
c152c796 AM |
11516 | |
11517 | /* Figure out the file positions for everything but the symbol table | |
11518 | and the relocs. We set symcount to force assign_section_numbers | |
11519 | to create a symbol table. */ | |
8539e4e8 | 11520 | bfd_get_symcount (abfd) = info->strip != strip_all || emit_relocs; |
c152c796 AM |
11521 | BFD_ASSERT (! abfd->output_has_begun); |
11522 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
11523 | goto error_return; | |
11524 | ||
ee75fd95 | 11525 | /* Set sizes, and assign file positions for reloc sections. */ |
c152c796 AM |
11526 | for (o = abfd->sections; o != NULL; o = o->next) |
11527 | { | |
d4730f92 | 11528 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
c152c796 AM |
11529 | if ((o->flags & SEC_RELOC) != 0) |
11530 | { | |
d4730f92 | 11531 | if (esdo->rel.hdr |
9eaff861 | 11532 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rel))) |
c152c796 AM |
11533 | goto error_return; |
11534 | ||
d4730f92 | 11535 | if (esdo->rela.hdr |
9eaff861 | 11536 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rela))) |
c152c796 AM |
11537 | goto error_return; |
11538 | } | |
11539 | ||
11540 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them | |
11541 | to count upwards while actually outputting the relocations. */ | |
d4730f92 BS |
11542 | esdo->rel.count = 0; |
11543 | esdo->rela.count = 0; | |
0ce398f1 L |
11544 | |
11545 | if (esdo->this_hdr.sh_offset == (file_ptr) -1) | |
11546 | { | |
11547 | /* Cache the section contents so that they can be compressed | |
11548 | later. Use bfd_malloc since it will be freed by | |
11549 | bfd_compress_section_contents. */ | |
11550 | unsigned char *contents = esdo->this_hdr.contents; | |
11551 | if ((o->flags & SEC_ELF_COMPRESS) == 0 || contents != NULL) | |
11552 | abort (); | |
11553 | contents | |
11554 | = (unsigned char *) bfd_malloc (esdo->this_hdr.sh_size); | |
11555 | if (contents == NULL) | |
11556 | goto error_return; | |
11557 | esdo->this_hdr.contents = contents; | |
11558 | } | |
c152c796 AM |
11559 | } |
11560 | ||
c152c796 | 11561 | /* We have now assigned file positions for all the sections except |
a485e98e AM |
11562 | .symtab, .strtab, and non-loaded reloc sections. We start the |
11563 | .symtab section at the current file position, and write directly | |
11564 | to it. We build the .strtab section in memory. */ | |
c152c796 AM |
11565 | bfd_get_symcount (abfd) = 0; |
11566 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
11567 | /* sh_name is set in prep_headers. */ | |
11568 | symtab_hdr->sh_type = SHT_SYMTAB; | |
11569 | /* sh_flags, sh_addr and sh_size all start off zero. */ | |
11570 | symtab_hdr->sh_entsize = bed->s->sizeof_sym; | |
11571 | /* sh_link is set in assign_section_numbers. */ | |
11572 | /* sh_info is set below. */ | |
11573 | /* sh_offset is set just below. */ | |
72de5009 | 11574 | symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align; |
c152c796 | 11575 | |
ef10c3ac L |
11576 | if (max_sym_count < 20) |
11577 | max_sym_count = 20; | |
64f52338 | 11578 | htab->strtabsize = max_sym_count; |
ef10c3ac | 11579 | amt = max_sym_count * sizeof (struct elf_sym_strtab); |
64f52338 AM |
11580 | htab->strtab = (struct elf_sym_strtab *) bfd_malloc (amt); |
11581 | if (htab->strtab == NULL) | |
c152c796 | 11582 | goto error_return; |
ef10c3ac L |
11583 | /* The real buffer will be allocated in elf_link_swap_symbols_out. */ |
11584 | flinfo.symshndxbuf | |
11585 | = (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF) | |
11586 | ? (Elf_External_Sym_Shndx *) -1 : NULL); | |
c152c796 | 11587 | |
8539e4e8 | 11588 | if (info->strip != strip_all || emit_relocs) |
c152c796 | 11589 | { |
8539e4e8 AM |
11590 | file_ptr off = elf_next_file_pos (abfd); |
11591 | ||
11592 | _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE); | |
11593 | ||
11594 | /* Note that at this point elf_next_file_pos (abfd) is | |
11595 | incorrect. We do not yet know the size of the .symtab section. | |
11596 | We correct next_file_pos below, after we do know the size. */ | |
11597 | ||
11598 | /* Start writing out the symbol table. The first symbol is always a | |
11599 | dummy symbol. */ | |
c152c796 AM |
11600 | elfsym.st_value = 0; |
11601 | elfsym.st_size = 0; | |
11602 | elfsym.st_info = 0; | |
11603 | elfsym.st_other = 0; | |
11604 | elfsym.st_shndx = SHN_UNDEF; | |
35fc36a8 | 11605 | elfsym.st_target_internal = 0; |
ef10c3ac L |
11606 | if (elf_link_output_symstrtab (&flinfo, NULL, &elfsym, |
11607 | bfd_und_section_ptr, NULL) != 1) | |
c152c796 | 11608 | goto error_return; |
c152c796 | 11609 | |
8539e4e8 AM |
11610 | /* Output a symbol for each section. We output these even if we are |
11611 | discarding local symbols, since they are used for relocs. These | |
11612 | symbols have no names. We store the index of each one in the | |
11613 | index field of the section, so that we can find it again when | |
11614 | outputting relocs. */ | |
11615 | ||
c152c796 AM |
11616 | elfsym.st_size = 0; |
11617 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
11618 | elfsym.st_other = 0; | |
f0b5bb34 | 11619 | elfsym.st_value = 0; |
35fc36a8 | 11620 | elfsym.st_target_internal = 0; |
c152c796 AM |
11621 | for (i = 1; i < elf_numsections (abfd); i++) |
11622 | { | |
11623 | o = bfd_section_from_elf_index (abfd, i); | |
11624 | if (o != NULL) | |
f0b5bb34 AM |
11625 | { |
11626 | o->target_index = bfd_get_symcount (abfd); | |
11627 | elfsym.st_shndx = i; | |
0e1862bb | 11628 | if (!bfd_link_relocatable (info)) |
f0b5bb34 | 11629 | elfsym.st_value = o->vma; |
ef10c3ac L |
11630 | if (elf_link_output_symstrtab (&flinfo, NULL, &elfsym, o, |
11631 | NULL) != 1) | |
f0b5bb34 AM |
11632 | goto error_return; |
11633 | } | |
c152c796 AM |
11634 | } |
11635 | } | |
11636 | ||
11637 | /* Allocate some memory to hold information read in from the input | |
11638 | files. */ | |
11639 | if (max_contents_size != 0) | |
11640 | { | |
8b127cbc AM |
11641 | flinfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
11642 | if (flinfo.contents == NULL) | |
c152c796 AM |
11643 | goto error_return; |
11644 | } | |
11645 | ||
11646 | if (max_external_reloc_size != 0) | |
11647 | { | |
8b127cbc AM |
11648 | flinfo.external_relocs = bfd_malloc (max_external_reloc_size); |
11649 | if (flinfo.external_relocs == NULL) | |
c152c796 AM |
11650 | goto error_return; |
11651 | } | |
11652 | ||
11653 | if (max_internal_reloc_count != 0) | |
11654 | { | |
11655 | amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel; | |
11656 | amt *= sizeof (Elf_Internal_Rela); | |
8b127cbc AM |
11657 | flinfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); |
11658 | if (flinfo.internal_relocs == NULL) | |
c152c796 AM |
11659 | goto error_return; |
11660 | } | |
11661 | ||
11662 | if (max_sym_count != 0) | |
11663 | { | |
11664 | amt = max_sym_count * bed->s->sizeof_sym; | |
8b127cbc AM |
11665 | flinfo.external_syms = (bfd_byte *) bfd_malloc (amt); |
11666 | if (flinfo.external_syms == NULL) | |
c152c796 AM |
11667 | goto error_return; |
11668 | ||
11669 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
8b127cbc AM |
11670 | flinfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt); |
11671 | if (flinfo.internal_syms == NULL) | |
c152c796 AM |
11672 | goto error_return; |
11673 | ||
11674 | amt = max_sym_count * sizeof (long); | |
8b127cbc AM |
11675 | flinfo.indices = (long int *) bfd_malloc (amt); |
11676 | if (flinfo.indices == NULL) | |
c152c796 AM |
11677 | goto error_return; |
11678 | ||
11679 | amt = max_sym_count * sizeof (asection *); | |
8b127cbc AM |
11680 | flinfo.sections = (asection **) bfd_malloc (amt); |
11681 | if (flinfo.sections == NULL) | |
c152c796 AM |
11682 | goto error_return; |
11683 | } | |
11684 | ||
11685 | if (max_sym_shndx_count != 0) | |
11686 | { | |
11687 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
8b127cbc AM |
11688 | flinfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); |
11689 | if (flinfo.locsym_shndx == NULL) | |
c152c796 AM |
11690 | goto error_return; |
11691 | } | |
11692 | ||
64f52338 | 11693 | if (htab->tls_sec) |
c152c796 AM |
11694 | { |
11695 | bfd_vma base, end = 0; | |
11696 | asection *sec; | |
11697 | ||
64f52338 | 11698 | for (sec = htab->tls_sec; |
c152c796 AM |
11699 | sec && (sec->flags & SEC_THREAD_LOCAL); |
11700 | sec = sec->next) | |
11701 | { | |
3a800eb9 | 11702 | bfd_size_type size = sec->size; |
c152c796 | 11703 | |
3a800eb9 AM |
11704 | if (size == 0 |
11705 | && (sec->flags & SEC_HAS_CONTENTS) == 0) | |
c152c796 | 11706 | { |
91d6fa6a NC |
11707 | struct bfd_link_order *ord = sec->map_tail.link_order; |
11708 | ||
11709 | if (ord != NULL) | |
11710 | size = ord->offset + ord->size; | |
c152c796 AM |
11711 | } |
11712 | end = sec->vma + size; | |
11713 | } | |
64f52338 | 11714 | base = htab->tls_sec->vma; |
7dc98aea RO |
11715 | /* Only align end of TLS section if static TLS doesn't have special |
11716 | alignment requirements. */ | |
11717 | if (bed->static_tls_alignment == 1) | |
64f52338 AM |
11718 | end = align_power (end, htab->tls_sec->alignment_power); |
11719 | htab->tls_size = end - base; | |
c152c796 AM |
11720 | } |
11721 | ||
0b52efa6 PB |
11722 | /* Reorder SHF_LINK_ORDER sections. */ |
11723 | for (o = abfd->sections; o != NULL; o = o->next) | |
11724 | { | |
11725 | if (!elf_fixup_link_order (abfd, o)) | |
11726 | return FALSE; | |
11727 | } | |
11728 | ||
2f0c68f2 CM |
11729 | if (!_bfd_elf_fixup_eh_frame_hdr (info)) |
11730 | return FALSE; | |
11731 | ||
c152c796 AM |
11732 | /* Since ELF permits relocations to be against local symbols, we |
11733 | must have the local symbols available when we do the relocations. | |
11734 | Since we would rather only read the local symbols once, and we | |
11735 | would rather not keep them in memory, we handle all the | |
11736 | relocations for a single input file at the same time. | |
11737 | ||
11738 | Unfortunately, there is no way to know the total number of local | |
11739 | symbols until we have seen all of them, and the local symbol | |
11740 | indices precede the global symbol indices. This means that when | |
11741 | we are generating relocatable output, and we see a reloc against | |
11742 | a global symbol, we can not know the symbol index until we have | |
11743 | finished examining all the local symbols to see which ones we are | |
11744 | going to output. To deal with this, we keep the relocations in | |
11745 | memory, and don't output them until the end of the link. This is | |
11746 | an unfortunate waste of memory, but I don't see a good way around | |
11747 | it. Fortunately, it only happens when performing a relocatable | |
11748 | link, which is not the common case. FIXME: If keep_memory is set | |
11749 | we could write the relocs out and then read them again; I don't | |
11750 | know how bad the memory loss will be. */ | |
11751 | ||
c72f2fb2 | 11752 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
11753 | sub->output_has_begun = FALSE; |
11754 | for (o = abfd->sections; o != NULL; o = o->next) | |
11755 | { | |
8423293d | 11756 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
11757 | { |
11758 | if (p->type == bfd_indirect_link_order | |
11759 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) | |
11760 | == bfd_target_elf_flavour) | |
11761 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) | |
11762 | { | |
11763 | if (! sub->output_has_begun) | |
11764 | { | |
8b127cbc | 11765 | if (! elf_link_input_bfd (&flinfo, sub)) |
c152c796 AM |
11766 | goto error_return; |
11767 | sub->output_has_begun = TRUE; | |
11768 | } | |
11769 | } | |
11770 | else if (p->type == bfd_section_reloc_link_order | |
11771 | || p->type == bfd_symbol_reloc_link_order) | |
11772 | { | |
11773 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
11774 | goto error_return; | |
11775 | } | |
11776 | else | |
11777 | { | |
11778 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
351f65ca L |
11779 | { |
11780 | if (p->type == bfd_indirect_link_order | |
11781 | && (bfd_get_flavour (sub) | |
11782 | == bfd_target_elf_flavour) | |
11783 | && (elf_elfheader (sub)->e_ident[EI_CLASS] | |
11784 | != bed->s->elfclass)) | |
11785 | { | |
11786 | const char *iclass, *oclass; | |
11787 | ||
aebf9be7 | 11788 | switch (bed->s->elfclass) |
351f65ca | 11789 | { |
aebf9be7 NC |
11790 | case ELFCLASS64: oclass = "ELFCLASS64"; break; |
11791 | case ELFCLASS32: oclass = "ELFCLASS32"; break; | |
11792 | case ELFCLASSNONE: oclass = "ELFCLASSNONE"; break; | |
11793 | default: abort (); | |
351f65ca | 11794 | } |
aebf9be7 NC |
11795 | |
11796 | switch (elf_elfheader (sub)->e_ident[EI_CLASS]) | |
351f65ca | 11797 | { |
aebf9be7 NC |
11798 | case ELFCLASS64: iclass = "ELFCLASS64"; break; |
11799 | case ELFCLASS32: iclass = "ELFCLASS32"; break; | |
11800 | case ELFCLASSNONE: iclass = "ELFCLASSNONE"; break; | |
11801 | default: abort (); | |
351f65ca L |
11802 | } |
11803 | ||
11804 | bfd_set_error (bfd_error_wrong_format); | |
4eca0228 | 11805 | _bfd_error_handler |
695344c0 | 11806 | /* xgettext:c-format */ |
351f65ca L |
11807 | (_("%B: file class %s incompatible with %s"), |
11808 | sub, iclass, oclass); | |
11809 | } | |
11810 | ||
11811 | goto error_return; | |
11812 | } | |
c152c796 AM |
11813 | } |
11814 | } | |
11815 | } | |
11816 | ||
c0f00686 L |
11817 | /* Free symbol buffer if needed. */ |
11818 | if (!info->reduce_memory_overheads) | |
11819 | { | |
c72f2fb2 | 11820 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
3fcd97f1 JJ |
11821 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour |
11822 | && elf_tdata (sub)->symbuf) | |
c0f00686 L |
11823 | { |
11824 | free (elf_tdata (sub)->symbuf); | |
11825 | elf_tdata (sub)->symbuf = NULL; | |
11826 | } | |
11827 | } | |
11828 | ||
c152c796 AM |
11829 | /* Output any global symbols that got converted to local in a |
11830 | version script or due to symbol visibility. We do this in a | |
11831 | separate step since ELF requires all local symbols to appear | |
11832 | prior to any global symbols. FIXME: We should only do this if | |
11833 | some global symbols were, in fact, converted to become local. | |
11834 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
11835 | eoinfo.failed = FALSE; | |
8b127cbc | 11836 | eoinfo.flinfo = &flinfo; |
c152c796 | 11837 | eoinfo.localsyms = TRUE; |
34a79995 | 11838 | eoinfo.file_sym_done = FALSE; |
7686d77d | 11839 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 AM |
11840 | if (eoinfo.failed) |
11841 | return FALSE; | |
11842 | ||
4e617b1e PB |
11843 | /* If backend needs to output some local symbols not present in the hash |
11844 | table, do it now. */ | |
8539e4e8 AM |
11845 | if (bed->elf_backend_output_arch_local_syms |
11846 | && (info->strip != strip_all || emit_relocs)) | |
4e617b1e | 11847 | { |
6e0b88f1 | 11848 | typedef int (*out_sym_func) |
4e617b1e PB |
11849 | (void *, const char *, Elf_Internal_Sym *, asection *, |
11850 | struct elf_link_hash_entry *); | |
11851 | ||
11852 | if (! ((*bed->elf_backend_output_arch_local_syms) | |
ef10c3ac L |
11853 | (abfd, info, &flinfo, |
11854 | (out_sym_func) elf_link_output_symstrtab))) | |
4e617b1e PB |
11855 | return FALSE; |
11856 | } | |
11857 | ||
c152c796 AM |
11858 | /* That wrote out all the local symbols. Finish up the symbol table |
11859 | with the global symbols. Even if we want to strip everything we | |
11860 | can, we still need to deal with those global symbols that got | |
11861 | converted to local in a version script. */ | |
11862 | ||
11863 | /* The sh_info field records the index of the first non local symbol. */ | |
11864 | symtab_hdr->sh_info = bfd_get_symcount (abfd); | |
11865 | ||
11866 | if (dynamic | |
64f52338 AM |
11867 | && htab->dynsym != NULL |
11868 | && htab->dynsym->output_section != bfd_abs_section_ptr) | |
c152c796 AM |
11869 | { |
11870 | Elf_Internal_Sym sym; | |
64f52338 | 11871 | bfd_byte *dynsym = htab->dynsym->contents; |
90ac2420 | 11872 | |
64f52338 AM |
11873 | o = htab->dynsym->output_section; |
11874 | elf_section_data (o)->this_hdr.sh_info = htab->local_dynsymcount + 1; | |
c152c796 AM |
11875 | |
11876 | /* Write out the section symbols for the output sections. */ | |
0e1862bb | 11877 | if (bfd_link_pic (info) |
64f52338 | 11878 | || htab->is_relocatable_executable) |
c152c796 AM |
11879 | { |
11880 | asection *s; | |
11881 | ||
11882 | sym.st_size = 0; | |
11883 | sym.st_name = 0; | |
11884 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
11885 | sym.st_other = 0; | |
35fc36a8 | 11886 | sym.st_target_internal = 0; |
c152c796 AM |
11887 | |
11888 | for (s = abfd->sections; s != NULL; s = s->next) | |
11889 | { | |
11890 | int indx; | |
11891 | bfd_byte *dest; | |
11892 | long dynindx; | |
11893 | ||
c152c796 | 11894 | dynindx = elf_section_data (s)->dynindx; |
8c37241b JJ |
11895 | if (dynindx <= 0) |
11896 | continue; | |
11897 | indx = elf_section_data (s)->this_idx; | |
c152c796 AM |
11898 | BFD_ASSERT (indx > 0); |
11899 | sym.st_shndx = indx; | |
c0d5a53d L |
11900 | if (! check_dynsym (abfd, &sym)) |
11901 | return FALSE; | |
c152c796 AM |
11902 | sym.st_value = s->vma; |
11903 | dest = dynsym + dynindx * bed->s->sizeof_sym; | |
11904 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); | |
11905 | } | |
c152c796 AM |
11906 | } |
11907 | ||
11908 | /* Write out the local dynsyms. */ | |
64f52338 | 11909 | if (htab->dynlocal) |
c152c796 AM |
11910 | { |
11911 | struct elf_link_local_dynamic_entry *e; | |
64f52338 | 11912 | for (e = htab->dynlocal; e ; e = e->next) |
c152c796 AM |
11913 | { |
11914 | asection *s; | |
11915 | bfd_byte *dest; | |
11916 | ||
935bd1e0 | 11917 | /* Copy the internal symbol and turn off visibility. |
c152c796 AM |
11918 | Note that we saved a word of storage and overwrote |
11919 | the original st_name with the dynstr_index. */ | |
11920 | sym = e->isym; | |
935bd1e0 | 11921 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); |
c152c796 | 11922 | |
cb33740c AM |
11923 | s = bfd_section_from_elf_index (e->input_bfd, |
11924 | e->isym.st_shndx); | |
11925 | if (s != NULL) | |
c152c796 | 11926 | { |
c152c796 AM |
11927 | sym.st_shndx = |
11928 | elf_section_data (s->output_section)->this_idx; | |
c0d5a53d L |
11929 | if (! check_dynsym (abfd, &sym)) |
11930 | return FALSE; | |
c152c796 AM |
11931 | sym.st_value = (s->output_section->vma |
11932 | + s->output_offset | |
11933 | + e->isym.st_value); | |
11934 | } | |
11935 | ||
c152c796 AM |
11936 | dest = dynsym + e->dynindx * bed->s->sizeof_sym; |
11937 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); | |
11938 | } | |
11939 | } | |
c152c796 AM |
11940 | } |
11941 | ||
11942 | /* We get the global symbols from the hash table. */ | |
11943 | eoinfo.failed = FALSE; | |
11944 | eoinfo.localsyms = FALSE; | |
8b127cbc | 11945 | eoinfo.flinfo = &flinfo; |
7686d77d | 11946 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 AM |
11947 | if (eoinfo.failed) |
11948 | return FALSE; | |
11949 | ||
11950 | /* If backend needs to output some symbols not present in the hash | |
11951 | table, do it now. */ | |
8539e4e8 AM |
11952 | if (bed->elf_backend_output_arch_syms |
11953 | && (info->strip != strip_all || emit_relocs)) | |
c152c796 | 11954 | { |
6e0b88f1 | 11955 | typedef int (*out_sym_func) |
c152c796 AM |
11956 | (void *, const char *, Elf_Internal_Sym *, asection *, |
11957 | struct elf_link_hash_entry *); | |
11958 | ||
11959 | if (! ((*bed->elf_backend_output_arch_syms) | |
ef10c3ac L |
11960 | (abfd, info, &flinfo, |
11961 | (out_sym_func) elf_link_output_symstrtab))) | |
c152c796 AM |
11962 | return FALSE; |
11963 | } | |
11964 | ||
ef10c3ac L |
11965 | /* Finalize the .strtab section. */ |
11966 | _bfd_elf_strtab_finalize (flinfo.symstrtab); | |
11967 | ||
11968 | /* Swap out the .strtab section. */ | |
11969 | if (!elf_link_swap_symbols_out (&flinfo)) | |
c152c796 AM |
11970 | return FALSE; |
11971 | ||
11972 | /* Now we know the size of the symtab section. */ | |
c152c796 AM |
11973 | if (bfd_get_symcount (abfd) > 0) |
11974 | { | |
ee3b52e9 L |
11975 | /* Finish up and write out the symbol string table (.strtab) |
11976 | section. */ | |
11977 | Elf_Internal_Shdr *symstrtab_hdr; | |
8539e4e8 AM |
11978 | file_ptr off = symtab_hdr->sh_offset + symtab_hdr->sh_size; |
11979 | ||
6a40cf0c NC |
11980 | symtab_shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; |
11981 | if (symtab_shndx_hdr != NULL && symtab_shndx_hdr->sh_name != 0) | |
8539e4e8 AM |
11982 | { |
11983 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
11984 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
11985 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
11986 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
11987 | symtab_shndx_hdr->sh_size = amt; | |
11988 | ||
11989 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, | |
11990 | off, TRUE); | |
11991 | ||
11992 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
11993 | || (bfd_bwrite (flinfo.symshndxbuf, amt, abfd) != amt)) | |
11994 | return FALSE; | |
11995 | } | |
ee3b52e9 L |
11996 | |
11997 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
11998 | /* sh_name was set in prep_headers. */ | |
11999 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
84865015 | 12000 | symstrtab_hdr->sh_flags = bed->elf_strtab_flags; |
ee3b52e9 | 12001 | symstrtab_hdr->sh_addr = 0; |
ef10c3ac | 12002 | symstrtab_hdr->sh_size = _bfd_elf_strtab_size (flinfo.symstrtab); |
ee3b52e9 L |
12003 | symstrtab_hdr->sh_entsize = 0; |
12004 | symstrtab_hdr->sh_link = 0; | |
12005 | symstrtab_hdr->sh_info = 0; | |
12006 | /* sh_offset is set just below. */ | |
12007 | symstrtab_hdr->sh_addralign = 1; | |
12008 | ||
12009 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, | |
12010 | off, TRUE); | |
12011 | elf_next_file_pos (abfd) = off; | |
12012 | ||
c152c796 | 12013 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 |
ef10c3ac | 12014 | || ! _bfd_elf_strtab_emit (abfd, flinfo.symstrtab)) |
c152c796 AM |
12015 | return FALSE; |
12016 | } | |
12017 | ||
76359541 TP |
12018 | if (info->out_implib_bfd && !elf_output_implib (abfd, info)) |
12019 | { | |
4eca0228 AM |
12020 | _bfd_error_handler (_("%B: failed to generate import library"), |
12021 | info->out_implib_bfd); | |
76359541 TP |
12022 | return FALSE; |
12023 | } | |
12024 | ||
c152c796 AM |
12025 | /* Adjust the relocs to have the correct symbol indices. */ |
12026 | for (o = abfd->sections; o != NULL; o = o->next) | |
12027 | { | |
d4730f92 | 12028 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
28dbcedc | 12029 | bfd_boolean sort; |
c152c796 AM |
12030 | if ((o->flags & SEC_RELOC) == 0) |
12031 | continue; | |
12032 | ||
28dbcedc | 12033 | sort = bed->sort_relocs_p == NULL || (*bed->sort_relocs_p) (o); |
bca6d0e3 | 12034 | if (esdo->rel.hdr != NULL |
9eaff861 | 12035 | && !elf_link_adjust_relocs (abfd, o, &esdo->rel, sort)) |
bca6d0e3 AM |
12036 | return FALSE; |
12037 | if (esdo->rela.hdr != NULL | |
9eaff861 | 12038 | && !elf_link_adjust_relocs (abfd, o, &esdo->rela, sort)) |
bca6d0e3 | 12039 | return FALSE; |
c152c796 AM |
12040 | |
12041 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
12042 | trying to swap the relocs out itself. */ | |
12043 | o->reloc_count = 0; | |
12044 | } | |
12045 | ||
12046 | if (dynamic && info->combreloc && dynobj != NULL) | |
12047 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
12048 | ||
12049 | /* If we are linking against a dynamic object, or generating a | |
12050 | shared library, finish up the dynamic linking information. */ | |
12051 | if (dynamic) | |
12052 | { | |
12053 | bfd_byte *dyncon, *dynconend; | |
12054 | ||
12055 | /* Fix up .dynamic entries. */ | |
3d4d4302 | 12056 | o = bfd_get_linker_section (dynobj, ".dynamic"); |
c152c796 AM |
12057 | BFD_ASSERT (o != NULL); |
12058 | ||
12059 | dyncon = o->contents; | |
eea6121a | 12060 | dynconend = o->contents + o->size; |
c152c796 AM |
12061 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) |
12062 | { | |
12063 | Elf_Internal_Dyn dyn; | |
12064 | const char *name; | |
12065 | unsigned int type; | |
12066 | ||
12067 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
12068 | ||
12069 | switch (dyn.d_tag) | |
12070 | { | |
12071 | default: | |
12072 | continue; | |
12073 | case DT_NULL: | |
12074 | if (relativecount > 0 && dyncon + bed->s->sizeof_dyn < dynconend) | |
12075 | { | |
12076 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
12077 | { | |
12078 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
12079 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
12080 | default: continue; | |
12081 | } | |
12082 | dyn.d_un.d_val = relativecount; | |
12083 | relativecount = 0; | |
12084 | break; | |
12085 | } | |
12086 | continue; | |
12087 | ||
12088 | case DT_INIT: | |
12089 | name = info->init_function; | |
12090 | goto get_sym; | |
12091 | case DT_FINI: | |
12092 | name = info->fini_function; | |
12093 | get_sym: | |
12094 | { | |
12095 | struct elf_link_hash_entry *h; | |
12096 | ||
64f52338 | 12097 | h = elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE); |
c152c796 AM |
12098 | if (h != NULL |
12099 | && (h->root.type == bfd_link_hash_defined | |
12100 | || h->root.type == bfd_link_hash_defweak)) | |
12101 | { | |
bef26483 | 12102 | dyn.d_un.d_ptr = h->root.u.def.value; |
c152c796 AM |
12103 | o = h->root.u.def.section; |
12104 | if (o->output_section != NULL) | |
bef26483 | 12105 | dyn.d_un.d_ptr += (o->output_section->vma |
c152c796 AM |
12106 | + o->output_offset); |
12107 | else | |
12108 | { | |
12109 | /* The symbol is imported from another shared | |
12110 | library and does not apply to this one. */ | |
bef26483 | 12111 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
12112 | } |
12113 | break; | |
12114 | } | |
12115 | } | |
12116 | continue; | |
12117 | ||
12118 | case DT_PREINIT_ARRAYSZ: | |
12119 | name = ".preinit_array"; | |
4ade44b7 | 12120 | goto get_out_size; |
c152c796 AM |
12121 | case DT_INIT_ARRAYSZ: |
12122 | name = ".init_array"; | |
4ade44b7 | 12123 | goto get_out_size; |
c152c796 AM |
12124 | case DT_FINI_ARRAYSZ: |
12125 | name = ".fini_array"; | |
4ade44b7 | 12126 | get_out_size: |
c152c796 AM |
12127 | o = bfd_get_section_by_name (abfd, name); |
12128 | if (o == NULL) | |
12129 | { | |
4eca0228 | 12130 | _bfd_error_handler |
4ade44b7 | 12131 | (_("could not find section %s"), name); |
c152c796 AM |
12132 | goto error_return; |
12133 | } | |
eea6121a | 12134 | if (o->size == 0) |
4eca0228 | 12135 | _bfd_error_handler |
c152c796 | 12136 | (_("warning: %s section has zero size"), name); |
eea6121a | 12137 | dyn.d_un.d_val = o->size; |
c152c796 AM |
12138 | break; |
12139 | ||
12140 | case DT_PREINIT_ARRAY: | |
12141 | name = ".preinit_array"; | |
4ade44b7 | 12142 | goto get_out_vma; |
c152c796 AM |
12143 | case DT_INIT_ARRAY: |
12144 | name = ".init_array"; | |
4ade44b7 | 12145 | goto get_out_vma; |
c152c796 AM |
12146 | case DT_FINI_ARRAY: |
12147 | name = ".fini_array"; | |
4ade44b7 AM |
12148 | get_out_vma: |
12149 | o = bfd_get_section_by_name (abfd, name); | |
12150 | goto do_vma; | |
c152c796 AM |
12151 | |
12152 | case DT_HASH: | |
12153 | name = ".hash"; | |
12154 | goto get_vma; | |
fdc90cb4 JJ |
12155 | case DT_GNU_HASH: |
12156 | name = ".gnu.hash"; | |
12157 | goto get_vma; | |
c152c796 AM |
12158 | case DT_STRTAB: |
12159 | name = ".dynstr"; | |
12160 | goto get_vma; | |
12161 | case DT_SYMTAB: | |
12162 | name = ".dynsym"; | |
12163 | goto get_vma; | |
12164 | case DT_VERDEF: | |
12165 | name = ".gnu.version_d"; | |
12166 | goto get_vma; | |
12167 | case DT_VERNEED: | |
12168 | name = ".gnu.version_r"; | |
12169 | goto get_vma; | |
12170 | case DT_VERSYM: | |
12171 | name = ".gnu.version"; | |
12172 | get_vma: | |
4ade44b7 AM |
12173 | o = bfd_get_linker_section (dynobj, name); |
12174 | do_vma: | |
c152c796 AM |
12175 | if (o == NULL) |
12176 | { | |
4eca0228 | 12177 | _bfd_error_handler |
4ade44b7 | 12178 | (_("could not find section %s"), name); |
c152c796 AM |
12179 | goto error_return; |
12180 | } | |
894891db NC |
12181 | if (elf_section_data (o->output_section)->this_hdr.sh_type == SHT_NOTE) |
12182 | { | |
4eca0228 | 12183 | _bfd_error_handler |
894891db NC |
12184 | (_("warning: section '%s' is being made into a note"), name); |
12185 | bfd_set_error (bfd_error_nonrepresentable_section); | |
12186 | goto error_return; | |
12187 | } | |
4ade44b7 | 12188 | dyn.d_un.d_ptr = o->output_section->vma + o->output_offset; |
c152c796 AM |
12189 | break; |
12190 | ||
12191 | case DT_REL: | |
12192 | case DT_RELA: | |
12193 | case DT_RELSZ: | |
12194 | case DT_RELASZ: | |
12195 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
12196 | type = SHT_REL; | |
12197 | else | |
12198 | type = SHT_RELA; | |
12199 | dyn.d_un.d_val = 0; | |
bef26483 | 12200 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
12201 | for (i = 1; i < elf_numsections (abfd); i++) |
12202 | { | |
12203 | Elf_Internal_Shdr *hdr; | |
12204 | ||
12205 | hdr = elf_elfsections (abfd)[i]; | |
12206 | if (hdr->sh_type == type | |
12207 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
12208 | { | |
12209 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
12210 | dyn.d_un.d_val += hdr->sh_size; | |
12211 | else | |
12212 | { | |
bef26483 AM |
12213 | if (dyn.d_un.d_ptr == 0 |
12214 | || hdr->sh_addr < dyn.d_un.d_ptr) | |
12215 | dyn.d_un.d_ptr = hdr->sh_addr; | |
c152c796 AM |
12216 | } |
12217 | } | |
12218 | } | |
64f52338 AM |
12219 | if (bed->dtrel_excludes_plt && htab->srelplt != NULL) |
12220 | { | |
12221 | /* Don't count procedure linkage table relocs in the | |
12222 | overall reloc count. */ | |
12223 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
12224 | dyn.d_un.d_val -= htab->srelplt->size; | |
12225 | /* If .rela.plt is the first .rela section, exclude | |
12226 | it from DT_RELA. */ | |
12227 | else if (dyn.d_un.d_ptr == (htab->srelplt->output_section->vma | |
12228 | + htab->srelplt->output_offset)) | |
12229 | dyn.d_un.d_ptr += htab->srelplt->size; | |
12230 | } | |
c152c796 AM |
12231 | break; |
12232 | } | |
12233 | bed->s->swap_dyn_out (dynobj, &dyn, dyncon); | |
12234 | } | |
12235 | } | |
12236 | ||
12237 | /* If we have created any dynamic sections, then output them. */ | |
12238 | if (dynobj != NULL) | |
12239 | { | |
12240 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
12241 | goto error_return; | |
12242 | ||
943284cc | 12243 | /* Check for DT_TEXTREL (late, in case the backend removes it). */ |
0e1862bb | 12244 | if (((info->warn_shared_textrel && bfd_link_pic (info)) |
be7b303d | 12245 | || info->error_textrel) |
3d4d4302 | 12246 | && (o = bfd_get_linker_section (dynobj, ".dynamic")) != NULL) |
943284cc DJ |
12247 | { |
12248 | bfd_byte *dyncon, *dynconend; | |
12249 | ||
943284cc DJ |
12250 | dyncon = o->contents; |
12251 | dynconend = o->contents + o->size; | |
12252 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) | |
12253 | { | |
12254 | Elf_Internal_Dyn dyn; | |
12255 | ||
12256 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
12257 | ||
12258 | if (dyn.d_tag == DT_TEXTREL) | |
12259 | { | |
c192a133 AM |
12260 | if (info->error_textrel) |
12261 | info->callbacks->einfo | |
12262 | (_("%P%X: read-only segment has dynamic relocations.\n")); | |
12263 | else | |
12264 | info->callbacks->einfo | |
12265 | (_("%P: warning: creating a DT_TEXTREL in a shared object.\n")); | |
943284cc DJ |
12266 | break; |
12267 | } | |
12268 | } | |
12269 | } | |
12270 | ||
c152c796 AM |
12271 | for (o = dynobj->sections; o != NULL; o = o->next) |
12272 | { | |
12273 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
eea6121a | 12274 | || o->size == 0 |
c152c796 AM |
12275 | || o->output_section == bfd_abs_section_ptr) |
12276 | continue; | |
12277 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
12278 | { | |
12279 | /* At this point, we are only interested in sections | |
12280 | created by _bfd_elf_link_create_dynamic_sections. */ | |
12281 | continue; | |
12282 | } | |
64f52338 | 12283 | if (htab->stab_info.stabstr == o) |
3722b82f | 12284 | continue; |
64f52338 | 12285 | if (htab->eh_info.hdr_sec == o) |
eea6121a | 12286 | continue; |
3d4d4302 | 12287 | if (strcmp (o->name, ".dynstr") != 0) |
c152c796 AM |
12288 | { |
12289 | if (! bfd_set_section_contents (abfd, o->output_section, | |
12290 | o->contents, | |
37b01f6a DG |
12291 | (file_ptr) o->output_offset |
12292 | * bfd_octets_per_byte (abfd), | |
eea6121a | 12293 | o->size)) |
c152c796 AM |
12294 | goto error_return; |
12295 | } | |
12296 | else | |
12297 | { | |
12298 | /* The contents of the .dynstr section are actually in a | |
12299 | stringtab. */ | |
8539e4e8 AM |
12300 | file_ptr off; |
12301 | ||
c152c796 AM |
12302 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
12303 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
64f52338 | 12304 | || !_bfd_elf_strtab_emit (abfd, htab->dynstr)) |
c152c796 AM |
12305 | goto error_return; |
12306 | } | |
12307 | } | |
12308 | } | |
12309 | ||
0e1862bb | 12310 | if (bfd_link_relocatable (info)) |
c152c796 AM |
12311 | { |
12312 | bfd_boolean failed = FALSE; | |
12313 | ||
12314 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
12315 | if (failed) | |
12316 | goto error_return; | |
12317 | } | |
12318 | ||
12319 | /* If we have optimized stabs strings, output them. */ | |
64f52338 | 12320 | if (htab->stab_info.stabstr != NULL) |
c152c796 | 12321 | { |
64f52338 | 12322 | if (!_bfd_write_stab_strings (abfd, &htab->stab_info)) |
c152c796 AM |
12323 | goto error_return; |
12324 | } | |
12325 | ||
9f7c3e5e AM |
12326 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
12327 | goto error_return; | |
c152c796 | 12328 | |
9f7c3e5e | 12329 | elf_final_link_free (abfd, &flinfo); |
c152c796 | 12330 | |
12bd6957 | 12331 | elf_linker (abfd) = TRUE; |
c152c796 | 12332 | |
104d59d1 JM |
12333 | if (attr_section) |
12334 | { | |
a50b1753 | 12335 | bfd_byte *contents = (bfd_byte *) bfd_malloc (attr_size); |
104d59d1 | 12336 | if (contents == NULL) |
d0f16d5e | 12337 | return FALSE; /* Bail out and fail. */ |
104d59d1 JM |
12338 | bfd_elf_set_obj_attr_contents (abfd, contents, attr_size); |
12339 | bfd_set_section_contents (abfd, attr_section, contents, 0, attr_size); | |
12340 | free (contents); | |
12341 | } | |
12342 | ||
c152c796 AM |
12343 | return TRUE; |
12344 | ||
12345 | error_return: | |
9f7c3e5e | 12346 | elf_final_link_free (abfd, &flinfo); |
c152c796 AM |
12347 | return FALSE; |
12348 | } | |
12349 | \f | |
5241d853 RS |
12350 | /* Initialize COOKIE for input bfd ABFD. */ |
12351 | ||
12352 | static bfd_boolean | |
12353 | init_reloc_cookie (struct elf_reloc_cookie *cookie, | |
12354 | struct bfd_link_info *info, bfd *abfd) | |
12355 | { | |
12356 | Elf_Internal_Shdr *symtab_hdr; | |
12357 | const struct elf_backend_data *bed; | |
12358 | ||
12359 | bed = get_elf_backend_data (abfd); | |
12360 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
12361 | ||
12362 | cookie->abfd = abfd; | |
12363 | cookie->sym_hashes = elf_sym_hashes (abfd); | |
12364 | cookie->bad_symtab = elf_bad_symtab (abfd); | |
12365 | if (cookie->bad_symtab) | |
12366 | { | |
12367 | cookie->locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
12368 | cookie->extsymoff = 0; | |
12369 | } | |
12370 | else | |
12371 | { | |
12372 | cookie->locsymcount = symtab_hdr->sh_info; | |
12373 | cookie->extsymoff = symtab_hdr->sh_info; | |
12374 | } | |
12375 | ||
12376 | if (bed->s->arch_size == 32) | |
12377 | cookie->r_sym_shift = 8; | |
12378 | else | |
12379 | cookie->r_sym_shift = 32; | |
12380 | ||
12381 | cookie->locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
12382 | if (cookie->locsyms == NULL && cookie->locsymcount != 0) | |
12383 | { | |
12384 | cookie->locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
12385 | cookie->locsymcount, 0, | |
12386 | NULL, NULL, NULL); | |
12387 | if (cookie->locsyms == NULL) | |
12388 | { | |
12389 | info->callbacks->einfo (_("%P%X: can not read symbols: %E\n")); | |
12390 | return FALSE; | |
12391 | } | |
12392 | if (info->keep_memory) | |
12393 | symtab_hdr->contents = (bfd_byte *) cookie->locsyms; | |
12394 | } | |
12395 | return TRUE; | |
12396 | } | |
12397 | ||
12398 | /* Free the memory allocated by init_reloc_cookie, if appropriate. */ | |
12399 | ||
12400 | static void | |
12401 | fini_reloc_cookie (struct elf_reloc_cookie *cookie, bfd *abfd) | |
12402 | { | |
12403 | Elf_Internal_Shdr *symtab_hdr; | |
12404 | ||
12405 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
12406 | if (cookie->locsyms != NULL | |
12407 | && symtab_hdr->contents != (unsigned char *) cookie->locsyms) | |
12408 | free (cookie->locsyms); | |
12409 | } | |
12410 | ||
12411 | /* Initialize the relocation information in COOKIE for input section SEC | |
12412 | of input bfd ABFD. */ | |
12413 | ||
12414 | static bfd_boolean | |
12415 | init_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
12416 | struct bfd_link_info *info, bfd *abfd, | |
12417 | asection *sec) | |
12418 | { | |
12419 | const struct elf_backend_data *bed; | |
12420 | ||
12421 | if (sec->reloc_count == 0) | |
12422 | { | |
12423 | cookie->rels = NULL; | |
12424 | cookie->relend = NULL; | |
12425 | } | |
12426 | else | |
12427 | { | |
12428 | bed = get_elf_backend_data (abfd); | |
12429 | ||
12430 | cookie->rels = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, | |
12431 | info->keep_memory); | |
12432 | if (cookie->rels == NULL) | |
12433 | return FALSE; | |
12434 | cookie->rel = cookie->rels; | |
12435 | cookie->relend = (cookie->rels | |
12436 | + sec->reloc_count * bed->s->int_rels_per_ext_rel); | |
12437 | } | |
12438 | cookie->rel = cookie->rels; | |
12439 | return TRUE; | |
12440 | } | |
12441 | ||
12442 | /* Free the memory allocated by init_reloc_cookie_rels, | |
12443 | if appropriate. */ | |
12444 | ||
12445 | static void | |
12446 | fini_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
12447 | asection *sec) | |
12448 | { | |
12449 | if (cookie->rels && elf_section_data (sec)->relocs != cookie->rels) | |
12450 | free (cookie->rels); | |
12451 | } | |
12452 | ||
12453 | /* Initialize the whole of COOKIE for input section SEC. */ | |
12454 | ||
12455 | static bfd_boolean | |
12456 | init_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
12457 | struct bfd_link_info *info, | |
12458 | asection *sec) | |
12459 | { | |
12460 | if (!init_reloc_cookie (cookie, info, sec->owner)) | |
12461 | goto error1; | |
12462 | if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec)) | |
12463 | goto error2; | |
12464 | return TRUE; | |
12465 | ||
12466 | error2: | |
12467 | fini_reloc_cookie (cookie, sec->owner); | |
12468 | error1: | |
12469 | return FALSE; | |
12470 | } | |
12471 | ||
12472 | /* Free the memory allocated by init_reloc_cookie_for_section, | |
12473 | if appropriate. */ | |
12474 | ||
12475 | static void | |
12476 | fini_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
12477 | asection *sec) | |
12478 | { | |
12479 | fini_reloc_cookie_rels (cookie, sec); | |
12480 | fini_reloc_cookie (cookie, sec->owner); | |
12481 | } | |
12482 | \f | |
c152c796 AM |
12483 | /* Garbage collect unused sections. */ |
12484 | ||
07adf181 AM |
12485 | /* Default gc_mark_hook. */ |
12486 | ||
12487 | asection * | |
12488 | _bfd_elf_gc_mark_hook (asection *sec, | |
12489 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
12490 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, | |
12491 | struct elf_link_hash_entry *h, | |
12492 | Elf_Internal_Sym *sym) | |
12493 | { | |
12494 | if (h != NULL) | |
12495 | { | |
12496 | switch (h->root.type) | |
12497 | { | |
12498 | case bfd_link_hash_defined: | |
12499 | case bfd_link_hash_defweak: | |
12500 | return h->root.u.def.section; | |
12501 | ||
12502 | case bfd_link_hash_common: | |
12503 | return h->root.u.c.p->section; | |
12504 | ||
12505 | default: | |
12506 | break; | |
12507 | } | |
12508 | } | |
12509 | else | |
12510 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
12511 | ||
12512 | return NULL; | |
12513 | } | |
12514 | ||
a6a4679f AM |
12515 | /* For undefined __start_<name> and __stop_<name> symbols, return the |
12516 | first input section matching <name>. Return NULL otherwise. */ | |
12517 | ||
12518 | asection * | |
12519 | _bfd_elf_is_start_stop (const struct bfd_link_info *info, | |
12520 | struct elf_link_hash_entry *h) | |
12521 | { | |
12522 | asection *s; | |
12523 | const char *sec_name; | |
12524 | ||
12525 | if (h->root.type != bfd_link_hash_undefined | |
12526 | && h->root.type != bfd_link_hash_undefweak) | |
12527 | return NULL; | |
12528 | ||
12529 | s = h->root.u.undef.section; | |
12530 | if (s != NULL) | |
12531 | { | |
12532 | if (s == (asection *) 0 - 1) | |
12533 | return NULL; | |
12534 | return s; | |
12535 | } | |
12536 | ||
12537 | sec_name = NULL; | |
12538 | if (strncmp (h->root.root.string, "__start_", 8) == 0) | |
12539 | sec_name = h->root.root.string + 8; | |
12540 | else if (strncmp (h->root.root.string, "__stop_", 7) == 0) | |
12541 | sec_name = h->root.root.string + 7; | |
12542 | ||
12543 | if (sec_name != NULL && *sec_name != '\0') | |
12544 | { | |
12545 | bfd *i; | |
12546 | ||
12547 | for (i = info->input_bfds; i != NULL; i = i->link.next) | |
12548 | { | |
12549 | s = bfd_get_section_by_name (i, sec_name); | |
12550 | if (s != NULL) | |
12551 | { | |
12552 | h->root.u.undef.section = s; | |
12553 | break; | |
12554 | } | |
12555 | } | |
12556 | } | |
12557 | ||
12558 | if (s == NULL) | |
12559 | h->root.u.undef.section = (asection *) 0 - 1; | |
12560 | ||
12561 | return s; | |
12562 | } | |
12563 | ||
5241d853 RS |
12564 | /* COOKIE->rel describes a relocation against section SEC, which is |
12565 | a section we've decided to keep. Return the section that contains | |
12566 | the relocation symbol, or NULL if no section contains it. */ | |
12567 | ||
12568 | asection * | |
12569 | _bfd_elf_gc_mark_rsec (struct bfd_link_info *info, asection *sec, | |
12570 | elf_gc_mark_hook_fn gc_mark_hook, | |
1cce69b9 AM |
12571 | struct elf_reloc_cookie *cookie, |
12572 | bfd_boolean *start_stop) | |
5241d853 RS |
12573 | { |
12574 | unsigned long r_symndx; | |
12575 | struct elf_link_hash_entry *h; | |
12576 | ||
12577 | r_symndx = cookie->rel->r_info >> cookie->r_sym_shift; | |
cf35638d | 12578 | if (r_symndx == STN_UNDEF) |
5241d853 RS |
12579 | return NULL; |
12580 | ||
12581 | if (r_symndx >= cookie->locsymcount | |
12582 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
12583 | { | |
12584 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; | |
263ddf68 L |
12585 | if (h == NULL) |
12586 | { | |
12587 | info->callbacks->einfo (_("%F%P: corrupt input: %B\n"), | |
12588 | sec->owner); | |
12589 | return NULL; | |
12590 | } | |
5241d853 RS |
12591 | while (h->root.type == bfd_link_hash_indirect |
12592 | || h->root.type == bfd_link_hash_warning) | |
12593 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1d5316ab | 12594 | h->mark = 1; |
4e6b54a6 AM |
12595 | /* If this symbol is weak and there is a non-weak definition, we |
12596 | keep the non-weak definition because many backends put | |
12597 | dynamic reloc info on the non-weak definition for code | |
12598 | handling copy relocs. */ | |
12599 | if (h->u.weakdef != NULL) | |
12600 | h->u.weakdef->mark = 1; | |
1cce69b9 | 12601 | |
a6a4679f | 12602 | if (start_stop != NULL) |
1cce69b9 AM |
12603 | { |
12604 | /* To work around a glibc bug, mark all XXX input sections | |
12605 | when there is an as yet undefined reference to __start_XXX | |
12606 | or __stop_XXX symbols. The linker will later define such | |
12607 | symbols for orphan input sections that have a name | |
12608 | representable as a C identifier. */ | |
a6a4679f | 12609 | asection *s = _bfd_elf_is_start_stop (info, h); |
1cce69b9 | 12610 | |
a6a4679f | 12611 | if (s != NULL) |
1cce69b9 | 12612 | { |
a6a4679f AM |
12613 | *start_stop = !s->gc_mark; |
12614 | return s; | |
1cce69b9 AM |
12615 | } |
12616 | } | |
12617 | ||
5241d853 RS |
12618 | return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL); |
12619 | } | |
12620 | ||
12621 | return (*gc_mark_hook) (sec, info, cookie->rel, NULL, | |
12622 | &cookie->locsyms[r_symndx]); | |
12623 | } | |
12624 | ||
12625 | /* COOKIE->rel describes a relocation against section SEC, which is | |
12626 | a section we've decided to keep. Mark the section that contains | |
9d0a14d3 | 12627 | the relocation symbol. */ |
5241d853 RS |
12628 | |
12629 | bfd_boolean | |
12630 | _bfd_elf_gc_mark_reloc (struct bfd_link_info *info, | |
12631 | asection *sec, | |
12632 | elf_gc_mark_hook_fn gc_mark_hook, | |
9d0a14d3 | 12633 | struct elf_reloc_cookie *cookie) |
5241d853 RS |
12634 | { |
12635 | asection *rsec; | |
1cce69b9 | 12636 | bfd_boolean start_stop = FALSE; |
5241d853 | 12637 | |
1cce69b9 AM |
12638 | rsec = _bfd_elf_gc_mark_rsec (info, sec, gc_mark_hook, cookie, &start_stop); |
12639 | while (rsec != NULL) | |
5241d853 | 12640 | { |
1cce69b9 AM |
12641 | if (!rsec->gc_mark) |
12642 | { | |
12643 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour | |
12644 | || (rsec->owner->flags & DYNAMIC) != 0) | |
12645 | rsec->gc_mark = 1; | |
12646 | else if (!_bfd_elf_gc_mark (info, rsec, gc_mark_hook)) | |
12647 | return FALSE; | |
12648 | } | |
12649 | if (!start_stop) | |
12650 | break; | |
199af150 | 12651 | rsec = bfd_get_next_section_by_name (rsec->owner, rsec); |
5241d853 RS |
12652 | } |
12653 | return TRUE; | |
12654 | } | |
12655 | ||
07adf181 AM |
12656 | /* The mark phase of garbage collection. For a given section, mark |
12657 | it and any sections in this section's group, and all the sections | |
12658 | which define symbols to which it refers. */ | |
12659 | ||
ccfa59ea AM |
12660 | bfd_boolean |
12661 | _bfd_elf_gc_mark (struct bfd_link_info *info, | |
12662 | asection *sec, | |
6a5bb875 | 12663 | elf_gc_mark_hook_fn gc_mark_hook) |
c152c796 AM |
12664 | { |
12665 | bfd_boolean ret; | |
9d0a14d3 | 12666 | asection *group_sec, *eh_frame; |
c152c796 AM |
12667 | |
12668 | sec->gc_mark = 1; | |
12669 | ||
12670 | /* Mark all the sections in the group. */ | |
12671 | group_sec = elf_section_data (sec)->next_in_group; | |
12672 | if (group_sec && !group_sec->gc_mark) | |
ccfa59ea | 12673 | if (!_bfd_elf_gc_mark (info, group_sec, gc_mark_hook)) |
c152c796 AM |
12674 | return FALSE; |
12675 | ||
12676 | /* Look through the section relocs. */ | |
12677 | ret = TRUE; | |
9d0a14d3 RS |
12678 | eh_frame = elf_eh_frame_section (sec->owner); |
12679 | if ((sec->flags & SEC_RELOC) != 0 | |
12680 | && sec->reloc_count > 0 | |
12681 | && sec != eh_frame) | |
c152c796 | 12682 | { |
5241d853 | 12683 | struct elf_reloc_cookie cookie; |
c152c796 | 12684 | |
5241d853 RS |
12685 | if (!init_reloc_cookie_for_section (&cookie, info, sec)) |
12686 | ret = FALSE; | |
c152c796 | 12687 | else |
c152c796 | 12688 | { |
5241d853 | 12689 | for (; cookie.rel < cookie.relend; cookie.rel++) |
9d0a14d3 | 12690 | if (!_bfd_elf_gc_mark_reloc (info, sec, gc_mark_hook, &cookie)) |
5241d853 RS |
12691 | { |
12692 | ret = FALSE; | |
12693 | break; | |
12694 | } | |
12695 | fini_reloc_cookie_for_section (&cookie, sec); | |
c152c796 AM |
12696 | } |
12697 | } | |
9d0a14d3 RS |
12698 | |
12699 | if (ret && eh_frame && elf_fde_list (sec)) | |
12700 | { | |
12701 | struct elf_reloc_cookie cookie; | |
12702 | ||
12703 | if (!init_reloc_cookie_for_section (&cookie, info, eh_frame)) | |
12704 | ret = FALSE; | |
12705 | else | |
12706 | { | |
12707 | if (!_bfd_elf_gc_mark_fdes (info, sec, eh_frame, | |
12708 | gc_mark_hook, &cookie)) | |
12709 | ret = FALSE; | |
12710 | fini_reloc_cookie_for_section (&cookie, eh_frame); | |
12711 | } | |
12712 | } | |
12713 | ||
2f0c68f2 CM |
12714 | eh_frame = elf_section_eh_frame_entry (sec); |
12715 | if (ret && eh_frame && !eh_frame->gc_mark) | |
12716 | if (!_bfd_elf_gc_mark (info, eh_frame, gc_mark_hook)) | |
12717 | ret = FALSE; | |
12718 | ||
c152c796 AM |
12719 | return ret; |
12720 | } | |
12721 | ||
3c758495 TG |
12722 | /* Scan and mark sections in a special or debug section group. */ |
12723 | ||
12724 | static void | |
12725 | _bfd_elf_gc_mark_debug_special_section_group (asection *grp) | |
12726 | { | |
12727 | /* Point to first section of section group. */ | |
12728 | asection *ssec; | |
12729 | /* Used to iterate the section group. */ | |
12730 | asection *msec; | |
12731 | ||
12732 | bfd_boolean is_special_grp = TRUE; | |
12733 | bfd_boolean is_debug_grp = TRUE; | |
12734 | ||
12735 | /* First scan to see if group contains any section other than debug | |
12736 | and special section. */ | |
12737 | ssec = msec = elf_next_in_group (grp); | |
12738 | do | |
12739 | { | |
12740 | if ((msec->flags & SEC_DEBUGGING) == 0) | |
12741 | is_debug_grp = FALSE; | |
12742 | ||
12743 | if ((msec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) != 0) | |
12744 | is_special_grp = FALSE; | |
12745 | ||
12746 | msec = elf_next_in_group (msec); | |
12747 | } | |
12748 | while (msec != ssec); | |
12749 | ||
12750 | /* If this is a pure debug section group or pure special section group, | |
12751 | keep all sections in this group. */ | |
12752 | if (is_debug_grp || is_special_grp) | |
12753 | { | |
12754 | do | |
12755 | { | |
12756 | msec->gc_mark = 1; | |
12757 | msec = elf_next_in_group (msec); | |
12758 | } | |
12759 | while (msec != ssec); | |
12760 | } | |
12761 | } | |
12762 | ||
7f6ab9f8 AM |
12763 | /* Keep debug and special sections. */ |
12764 | ||
12765 | bfd_boolean | |
12766 | _bfd_elf_gc_mark_extra_sections (struct bfd_link_info *info, | |
12767 | elf_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED) | |
12768 | { | |
12769 | bfd *ibfd; | |
12770 | ||
c72f2fb2 | 12771 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
7f6ab9f8 AM |
12772 | { |
12773 | asection *isec; | |
12774 | bfd_boolean some_kept; | |
b40bf0a2 | 12775 | bfd_boolean debug_frag_seen; |
7f6ab9f8 AM |
12776 | |
12777 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
12778 | continue; | |
12779 | ||
b40bf0a2 NC |
12780 | /* Ensure all linker created sections are kept, |
12781 | see if any other section is already marked, | |
12782 | and note if we have any fragmented debug sections. */ | |
12783 | debug_frag_seen = some_kept = FALSE; | |
7f6ab9f8 AM |
12784 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
12785 | { | |
12786 | if ((isec->flags & SEC_LINKER_CREATED) != 0) | |
12787 | isec->gc_mark = 1; | |
12788 | else if (isec->gc_mark) | |
12789 | some_kept = TRUE; | |
b40bf0a2 NC |
12790 | |
12791 | if (debug_frag_seen == FALSE | |
12792 | && (isec->flags & SEC_DEBUGGING) | |
12793 | && CONST_STRNEQ (isec->name, ".debug_line.")) | |
12794 | debug_frag_seen = TRUE; | |
7f6ab9f8 AM |
12795 | } |
12796 | ||
12797 | /* If no section in this file will be kept, then we can | |
b40bf0a2 | 12798 | toss out the debug and special sections. */ |
7f6ab9f8 AM |
12799 | if (!some_kept) |
12800 | continue; | |
12801 | ||
12802 | /* Keep debug and special sections like .comment when they are | |
3c758495 TG |
12803 | not part of a group. Also keep section groups that contain |
12804 | just debug sections or special sections. */ | |
7f6ab9f8 | 12805 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
3c758495 TG |
12806 | { |
12807 | if ((isec->flags & SEC_GROUP) != 0) | |
12808 | _bfd_elf_gc_mark_debug_special_section_group (isec); | |
12809 | else if (((isec->flags & SEC_DEBUGGING) != 0 | |
12810 | || (isec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0) | |
12811 | && elf_next_in_group (isec) == NULL) | |
12812 | isec->gc_mark = 1; | |
12813 | } | |
b40bf0a2 NC |
12814 | |
12815 | if (! debug_frag_seen) | |
12816 | continue; | |
12817 | ||
12818 | /* Look for CODE sections which are going to be discarded, | |
12819 | and find and discard any fragmented debug sections which | |
12820 | are associated with that code section. */ | |
12821 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) | |
12822 | if ((isec->flags & SEC_CODE) != 0 | |
12823 | && isec->gc_mark == 0) | |
12824 | { | |
12825 | unsigned int ilen; | |
12826 | asection *dsec; | |
12827 | ||
12828 | ilen = strlen (isec->name); | |
12829 | ||
12830 | /* Association is determined by the name of the debug section | |
12831 | containing the name of the code section as a suffix. For | |
12832 | example .debug_line.text.foo is a debug section associated | |
12833 | with .text.foo. */ | |
12834 | for (dsec = ibfd->sections; dsec != NULL; dsec = dsec->next) | |
12835 | { | |
12836 | unsigned int dlen; | |
12837 | ||
12838 | if (dsec->gc_mark == 0 | |
12839 | || (dsec->flags & SEC_DEBUGGING) == 0) | |
12840 | continue; | |
12841 | ||
12842 | dlen = strlen (dsec->name); | |
12843 | ||
12844 | if (dlen > ilen | |
12845 | && strncmp (dsec->name + (dlen - ilen), | |
12846 | isec->name, ilen) == 0) | |
12847 | { | |
12848 | dsec->gc_mark = 0; | |
b40bf0a2 NC |
12849 | } |
12850 | } | |
12851 | } | |
7f6ab9f8 AM |
12852 | } |
12853 | return TRUE; | |
12854 | } | |
12855 | ||
c152c796 AM |
12856 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ |
12857 | ||
c17d87de NC |
12858 | struct elf_gc_sweep_symbol_info |
12859 | { | |
ccabcbe5 AM |
12860 | struct bfd_link_info *info; |
12861 | void (*hide_symbol) (struct bfd_link_info *, struct elf_link_hash_entry *, | |
12862 | bfd_boolean); | |
12863 | }; | |
12864 | ||
c152c796 | 12865 | static bfd_boolean |
ccabcbe5 | 12866 | elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *data) |
c152c796 | 12867 | { |
1d5316ab AM |
12868 | if (!h->mark |
12869 | && (((h->root.type == bfd_link_hash_defined | |
12870 | || h->root.type == bfd_link_hash_defweak) | |
c4621b33 | 12871 | && !((h->def_regular || ELF_COMMON_DEF_P (h)) |
6673f753 | 12872 | && h->root.u.def.section->gc_mark)) |
1d5316ab AM |
12873 | || h->root.type == bfd_link_hash_undefined |
12874 | || h->root.type == bfd_link_hash_undefweak)) | |
12875 | { | |
12876 | struct elf_gc_sweep_symbol_info *inf; | |
12877 | ||
12878 | inf = (struct elf_gc_sweep_symbol_info *) data; | |
ccabcbe5 | 12879 | (*inf->hide_symbol) (inf->info, h, TRUE); |
1d5316ab AM |
12880 | h->def_regular = 0; |
12881 | h->ref_regular = 0; | |
12882 | h->ref_regular_nonweak = 0; | |
ccabcbe5 | 12883 | } |
c152c796 AM |
12884 | |
12885 | return TRUE; | |
12886 | } | |
12887 | ||
12888 | /* The sweep phase of garbage collection. Remove all garbage sections. */ | |
12889 | ||
12890 | typedef bfd_boolean (*gc_sweep_hook_fn) | |
12891 | (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); | |
12892 | ||
12893 | static bfd_boolean | |
ccabcbe5 | 12894 | elf_gc_sweep (bfd *abfd, struct bfd_link_info *info) |
c152c796 AM |
12895 | { |
12896 | bfd *sub; | |
ccabcbe5 AM |
12897 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
12898 | gc_sweep_hook_fn gc_sweep_hook = bed->gc_sweep_hook; | |
12899 | unsigned long section_sym_count; | |
12900 | struct elf_gc_sweep_symbol_info sweep_info; | |
c152c796 | 12901 | |
c72f2fb2 | 12902 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
12903 | { |
12904 | asection *o; | |
12905 | ||
b19a8f85 L |
12906 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
12907 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) | |
c152c796 AM |
12908 | continue; |
12909 | ||
12910 | for (o = sub->sections; o != NULL; o = o->next) | |
12911 | { | |
a33dafc3 L |
12912 | /* When any section in a section group is kept, we keep all |
12913 | sections in the section group. If the first member of | |
12914 | the section group is excluded, we will also exclude the | |
12915 | group section. */ | |
12916 | if (o->flags & SEC_GROUP) | |
12917 | { | |
12918 | asection *first = elf_next_in_group (o); | |
12919 | o->gc_mark = first->gc_mark; | |
12920 | } | |
c152c796 | 12921 | |
1e7eae0d | 12922 | if (o->gc_mark) |
c152c796 AM |
12923 | continue; |
12924 | ||
12925 | /* Skip sweeping sections already excluded. */ | |
12926 | if (o->flags & SEC_EXCLUDE) | |
12927 | continue; | |
12928 | ||
12929 | /* Since this is early in the link process, it is simple | |
12930 | to remove a section from the output. */ | |
12931 | o->flags |= SEC_EXCLUDE; | |
12932 | ||
c55fe096 | 12933 | if (info->print_gc_sections && o->size != 0) |
695344c0 | 12934 | /* xgettext:c-format */ |
c17d87de NC |
12935 | _bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub, o->name); |
12936 | ||
c152c796 AM |
12937 | /* But we also have to update some of the relocation |
12938 | info we collected before. */ | |
12939 | if (gc_sweep_hook | |
e8aaee2a | 12940 | && (o->flags & SEC_RELOC) != 0 |
9850436d AM |
12941 | && o->reloc_count != 0 |
12942 | && !((info->strip == strip_all || info->strip == strip_debugger) | |
12943 | && (o->flags & SEC_DEBUGGING) != 0) | |
e8aaee2a | 12944 | && !bfd_is_abs_section (o->output_section)) |
c152c796 AM |
12945 | { |
12946 | Elf_Internal_Rela *internal_relocs; | |
12947 | bfd_boolean r; | |
12948 | ||
12949 | internal_relocs | |
12950 | = _bfd_elf_link_read_relocs (o->owner, o, NULL, NULL, | |
12951 | info->keep_memory); | |
12952 | if (internal_relocs == NULL) | |
12953 | return FALSE; | |
12954 | ||
12955 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); | |
12956 | ||
12957 | if (elf_section_data (o)->relocs != internal_relocs) | |
12958 | free (internal_relocs); | |
12959 | ||
12960 | if (!r) | |
12961 | return FALSE; | |
12962 | } | |
12963 | } | |
12964 | } | |
12965 | ||
12966 | /* Remove the symbols that were in the swept sections from the dynamic | |
12967 | symbol table. GCFIXME: Anyone know how to get them out of the | |
12968 | static symbol table as well? */ | |
ccabcbe5 AM |
12969 | sweep_info.info = info; |
12970 | sweep_info.hide_symbol = bed->elf_backend_hide_symbol; | |
12971 | elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol, | |
12972 | &sweep_info); | |
c152c796 | 12973 | |
ccabcbe5 | 12974 | _bfd_elf_link_renumber_dynsyms (abfd, info, §ion_sym_count); |
c152c796 AM |
12975 | return TRUE; |
12976 | } | |
12977 | ||
12978 | /* Propagate collected vtable information. This is called through | |
12979 | elf_link_hash_traverse. */ | |
12980 | ||
12981 | static bfd_boolean | |
12982 | elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry *h, void *okp) | |
12983 | { | |
c152c796 | 12984 | /* Those that are not vtables. */ |
f6e332e6 | 12985 | if (h->vtable == NULL || h->vtable->parent == NULL) |
c152c796 AM |
12986 | return TRUE; |
12987 | ||
12988 | /* Those vtables that do not have parents, we cannot merge. */ | |
f6e332e6 | 12989 | if (h->vtable->parent == (struct elf_link_hash_entry *) -1) |
c152c796 AM |
12990 | return TRUE; |
12991 | ||
12992 | /* If we've already been done, exit. */ | |
f6e332e6 | 12993 | if (h->vtable->used && h->vtable->used[-1]) |
c152c796 AM |
12994 | return TRUE; |
12995 | ||
12996 | /* Make sure the parent's table is up to date. */ | |
f6e332e6 | 12997 | elf_gc_propagate_vtable_entries_used (h->vtable->parent, okp); |
c152c796 | 12998 | |
f6e332e6 | 12999 | if (h->vtable->used == NULL) |
c152c796 AM |
13000 | { |
13001 | /* None of this table's entries were referenced. Re-use the | |
13002 | parent's table. */ | |
f6e332e6 AM |
13003 | h->vtable->used = h->vtable->parent->vtable->used; |
13004 | h->vtable->size = h->vtable->parent->vtable->size; | |
c152c796 AM |
13005 | } |
13006 | else | |
13007 | { | |
13008 | size_t n; | |
13009 | bfd_boolean *cu, *pu; | |
13010 | ||
13011 | /* Or the parent's entries into ours. */ | |
f6e332e6 | 13012 | cu = h->vtable->used; |
c152c796 | 13013 | cu[-1] = TRUE; |
f6e332e6 | 13014 | pu = h->vtable->parent->vtable->used; |
c152c796 AM |
13015 | if (pu != NULL) |
13016 | { | |
13017 | const struct elf_backend_data *bed; | |
13018 | unsigned int log_file_align; | |
13019 | ||
13020 | bed = get_elf_backend_data (h->root.u.def.section->owner); | |
13021 | log_file_align = bed->s->log_file_align; | |
f6e332e6 | 13022 | n = h->vtable->parent->vtable->size >> log_file_align; |
c152c796 AM |
13023 | while (n--) |
13024 | { | |
13025 | if (*pu) | |
13026 | *cu = TRUE; | |
13027 | pu++; | |
13028 | cu++; | |
13029 | } | |
13030 | } | |
13031 | } | |
13032 | ||
13033 | return TRUE; | |
13034 | } | |
13035 | ||
13036 | static bfd_boolean | |
13037 | elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp) | |
13038 | { | |
13039 | asection *sec; | |
13040 | bfd_vma hstart, hend; | |
13041 | Elf_Internal_Rela *relstart, *relend, *rel; | |
13042 | const struct elf_backend_data *bed; | |
13043 | unsigned int log_file_align; | |
13044 | ||
c152c796 AM |
13045 | /* Take care of both those symbols that do not describe vtables as |
13046 | well as those that are not loaded. */ | |
f6e332e6 | 13047 | if (h->vtable == NULL || h->vtable->parent == NULL) |
c152c796 AM |
13048 | return TRUE; |
13049 | ||
13050 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
13051 | || h->root.type == bfd_link_hash_defweak); | |
13052 | ||
13053 | sec = h->root.u.def.section; | |
13054 | hstart = h->root.u.def.value; | |
13055 | hend = hstart + h->size; | |
13056 | ||
13057 | relstart = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, TRUE); | |
13058 | if (!relstart) | |
13059 | return *(bfd_boolean *) okp = FALSE; | |
13060 | bed = get_elf_backend_data (sec->owner); | |
13061 | log_file_align = bed->s->log_file_align; | |
13062 | ||
13063 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; | |
13064 | ||
13065 | for (rel = relstart; rel < relend; ++rel) | |
13066 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
13067 | { | |
13068 | /* If the entry is in use, do nothing. */ | |
f6e332e6 AM |
13069 | if (h->vtable->used |
13070 | && (rel->r_offset - hstart) < h->vtable->size) | |
c152c796 AM |
13071 | { |
13072 | bfd_vma entry = (rel->r_offset - hstart) >> log_file_align; | |
f6e332e6 | 13073 | if (h->vtable->used[entry]) |
c152c796 AM |
13074 | continue; |
13075 | } | |
13076 | /* Otherwise, kill it. */ | |
13077 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
13078 | } | |
13079 | ||
13080 | return TRUE; | |
13081 | } | |
13082 | ||
87538722 AM |
13083 | /* Mark sections containing dynamically referenced symbols. When |
13084 | building shared libraries, we must assume that any visible symbol is | |
13085 | referenced. */ | |
715df9b8 | 13086 | |
64d03ab5 AM |
13087 | bfd_boolean |
13088 | bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry *h, void *inf) | |
715df9b8 | 13089 | { |
87538722 | 13090 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
d6f6f455 | 13091 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
87538722 | 13092 | |
715df9b8 EB |
13093 | if ((h->root.type == bfd_link_hash_defined |
13094 | || h->root.type == bfd_link_hash_defweak) | |
87538722 | 13095 | && (h->ref_dynamic |
c4621b33 | 13096 | || ((h->def_regular || ELF_COMMON_DEF_P (h)) |
87538722 | 13097 | && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL |
fd91d419 | 13098 | && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN |
0e1862bb | 13099 | && (!bfd_link_executable (info) |
22185505 | 13100 | || info->gc_keep_exported |
b407645f AM |
13101 | || info->export_dynamic |
13102 | || (h->dynamic | |
13103 | && d != NULL | |
13104 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
422f1182 | 13105 | && (h->versioned >= versioned |
54e8959c L |
13106 | || !bfd_hide_sym_by_version (info->version_info, |
13107 | h->root.root.string))))) | |
715df9b8 EB |
13108 | h->root.u.def.section->flags |= SEC_KEEP; |
13109 | ||
13110 | return TRUE; | |
13111 | } | |
3b36f7e6 | 13112 | |
74f0fb50 AM |
13113 | /* Keep all sections containing symbols undefined on the command-line, |
13114 | and the section containing the entry symbol. */ | |
13115 | ||
13116 | void | |
13117 | _bfd_elf_gc_keep (struct bfd_link_info *info) | |
13118 | { | |
13119 | struct bfd_sym_chain *sym; | |
13120 | ||
13121 | for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) | |
13122 | { | |
13123 | struct elf_link_hash_entry *h; | |
13124 | ||
13125 | h = elf_link_hash_lookup (elf_hash_table (info), sym->name, | |
13126 | FALSE, FALSE, FALSE); | |
13127 | ||
13128 | if (h != NULL | |
13129 | && (h->root.type == bfd_link_hash_defined | |
13130 | || h->root.type == bfd_link_hash_defweak) | |
f02cb058 AM |
13131 | && !bfd_is_abs_section (h->root.u.def.section) |
13132 | && !bfd_is_und_section (h->root.u.def.section)) | |
74f0fb50 AM |
13133 | h->root.u.def.section->flags |= SEC_KEEP; |
13134 | } | |
13135 | } | |
13136 | ||
2f0c68f2 CM |
13137 | bfd_boolean |
13138 | bfd_elf_parse_eh_frame_entries (bfd *abfd ATTRIBUTE_UNUSED, | |
13139 | struct bfd_link_info *info) | |
13140 | { | |
13141 | bfd *ibfd = info->input_bfds; | |
13142 | ||
13143 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
13144 | { | |
13145 | asection *sec; | |
13146 | struct elf_reloc_cookie cookie; | |
13147 | ||
13148 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
13149 | continue; | |
13150 | ||
13151 | if (!init_reloc_cookie (&cookie, info, ibfd)) | |
13152 | return FALSE; | |
13153 | ||
13154 | for (sec = ibfd->sections; sec; sec = sec->next) | |
13155 | { | |
13156 | if (CONST_STRNEQ (bfd_section_name (ibfd, sec), ".eh_frame_entry") | |
13157 | && init_reloc_cookie_rels (&cookie, info, ibfd, sec)) | |
13158 | { | |
13159 | _bfd_elf_parse_eh_frame_entry (info, sec, &cookie); | |
13160 | fini_reloc_cookie_rels (&cookie, sec); | |
13161 | } | |
13162 | } | |
13163 | } | |
13164 | return TRUE; | |
13165 | } | |
13166 | ||
c152c796 AM |
13167 | /* Do mark and sweep of unused sections. */ |
13168 | ||
13169 | bfd_boolean | |
13170 | bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info) | |
13171 | { | |
13172 | bfd_boolean ok = TRUE; | |
13173 | bfd *sub; | |
6a5bb875 | 13174 | elf_gc_mark_hook_fn gc_mark_hook; |
64d03ab5 | 13175 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
da44f4e5 | 13176 | struct elf_link_hash_table *htab; |
c152c796 | 13177 | |
64d03ab5 | 13178 | if (!bed->can_gc_sections |
715df9b8 | 13179 | || !is_elf_hash_table (info->hash)) |
c152c796 | 13180 | { |
4eca0228 | 13181 | _bfd_error_handler(_("Warning: gc-sections option ignored")); |
c152c796 AM |
13182 | return TRUE; |
13183 | } | |
13184 | ||
74f0fb50 | 13185 | bed->gc_keep (info); |
da44f4e5 | 13186 | htab = elf_hash_table (info); |
74f0fb50 | 13187 | |
9d0a14d3 RS |
13188 | /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section |
13189 | at the .eh_frame section if we can mark the FDEs individually. */ | |
2f0c68f2 CM |
13190 | for (sub = info->input_bfds; |
13191 | info->eh_frame_hdr_type != COMPACT_EH_HDR && sub != NULL; | |
13192 | sub = sub->link.next) | |
9d0a14d3 RS |
13193 | { |
13194 | asection *sec; | |
13195 | struct elf_reloc_cookie cookie; | |
13196 | ||
13197 | sec = bfd_get_section_by_name (sub, ".eh_frame"); | |
9a2a56cc | 13198 | while (sec && init_reloc_cookie_for_section (&cookie, info, sec)) |
9d0a14d3 RS |
13199 | { |
13200 | _bfd_elf_parse_eh_frame (sub, info, sec, &cookie); | |
9a2a56cc AM |
13201 | if (elf_section_data (sec)->sec_info |
13202 | && (sec->flags & SEC_LINKER_CREATED) == 0) | |
9d0a14d3 RS |
13203 | elf_eh_frame_section (sub) = sec; |
13204 | fini_reloc_cookie_for_section (&cookie, sec); | |
199af150 | 13205 | sec = bfd_get_next_section_by_name (NULL, sec); |
9d0a14d3 RS |
13206 | } |
13207 | } | |
9d0a14d3 | 13208 | |
c152c796 | 13209 | /* Apply transitive closure to the vtable entry usage info. */ |
da44f4e5 | 13210 | elf_link_hash_traverse (htab, elf_gc_propagate_vtable_entries_used, &ok); |
c152c796 AM |
13211 | if (!ok) |
13212 | return FALSE; | |
13213 | ||
13214 | /* Kill the vtable relocations that were not used. */ | |
da44f4e5 | 13215 | elf_link_hash_traverse (htab, elf_gc_smash_unused_vtentry_relocs, &ok); |
c152c796 AM |
13216 | if (!ok) |
13217 | return FALSE; | |
13218 | ||
715df9b8 | 13219 | /* Mark dynamically referenced symbols. */ |
22185505 | 13220 | if (htab->dynamic_sections_created || info->gc_keep_exported) |
da44f4e5 | 13221 | elf_link_hash_traverse (htab, bed->gc_mark_dynamic_ref, info); |
c152c796 | 13222 | |
715df9b8 | 13223 | /* Grovel through relocs to find out who stays ... */ |
64d03ab5 | 13224 | gc_mark_hook = bed->gc_mark_hook; |
c72f2fb2 | 13225 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
13226 | { |
13227 | asection *o; | |
13228 | ||
b19a8f85 L |
13229 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
13230 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) | |
c152c796 AM |
13231 | continue; |
13232 | ||
7f6ab9f8 AM |
13233 | /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep). |
13234 | Also treat note sections as a root, if the section is not part | |
13235 | of a group. */ | |
c152c796 | 13236 | for (o = sub->sections; o != NULL; o = o->next) |
7f6ab9f8 AM |
13237 | if (!o->gc_mark |
13238 | && (o->flags & SEC_EXCLUDE) == 0 | |
24007750 | 13239 | && ((o->flags & SEC_KEEP) != 0 |
7f6ab9f8 AM |
13240 | || (elf_section_data (o)->this_hdr.sh_type == SHT_NOTE |
13241 | && elf_next_in_group (o) == NULL ))) | |
13242 | { | |
13243 | if (!_bfd_elf_gc_mark (info, o, gc_mark_hook)) | |
13244 | return FALSE; | |
13245 | } | |
c152c796 AM |
13246 | } |
13247 | ||
6a5bb875 | 13248 | /* Allow the backend to mark additional target specific sections. */ |
7f6ab9f8 | 13249 | bed->gc_mark_extra_sections (info, gc_mark_hook); |
6a5bb875 | 13250 | |
c152c796 | 13251 | /* ... and mark SEC_EXCLUDE for those that go. */ |
ccabcbe5 | 13252 | return elf_gc_sweep (abfd, info); |
c152c796 AM |
13253 | } |
13254 | \f | |
13255 | /* Called from check_relocs to record the existence of a VTINHERIT reloc. */ | |
13256 | ||
13257 | bfd_boolean | |
13258 | bfd_elf_gc_record_vtinherit (bfd *abfd, | |
13259 | asection *sec, | |
13260 | struct elf_link_hash_entry *h, | |
13261 | bfd_vma offset) | |
13262 | { | |
13263 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
13264 | struct elf_link_hash_entry **search, *child; | |
ef53be89 | 13265 | size_t extsymcount; |
c152c796 AM |
13266 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
13267 | ||
13268 | /* The sh_info field of the symtab header tells us where the | |
13269 | external symbols start. We don't care about the local symbols at | |
13270 | this point. */ | |
13271 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size / bed->s->sizeof_sym; | |
13272 | if (!elf_bad_symtab (abfd)) | |
13273 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
13274 | ||
13275 | sym_hashes = elf_sym_hashes (abfd); | |
13276 | sym_hashes_end = sym_hashes + extsymcount; | |
13277 | ||
13278 | /* Hunt down the child symbol, which is in this section at the same | |
13279 | offset as the relocation. */ | |
13280 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
13281 | { | |
13282 | if ((child = *search) != NULL | |
13283 | && (child->root.type == bfd_link_hash_defined | |
13284 | || child->root.type == bfd_link_hash_defweak) | |
13285 | && child->root.u.def.section == sec | |
13286 | && child->root.u.def.value == offset) | |
13287 | goto win; | |
13288 | } | |
13289 | ||
695344c0 NC |
13290 | /* xgettext:c-format */ |
13291 | _bfd_error_handler (_("%B: %A+%lu: No symbol found for INHERIT"), | |
4eca0228 | 13292 | abfd, sec, (unsigned long) offset); |
c152c796 AM |
13293 | bfd_set_error (bfd_error_invalid_operation); |
13294 | return FALSE; | |
13295 | ||
13296 | win: | |
f6e332e6 AM |
13297 | if (!child->vtable) |
13298 | { | |
ca4be51c AM |
13299 | child->vtable = ((struct elf_link_virtual_table_entry *) |
13300 | bfd_zalloc (abfd, sizeof (*child->vtable))); | |
f6e332e6 AM |
13301 | if (!child->vtable) |
13302 | return FALSE; | |
13303 | } | |
c152c796 AM |
13304 | if (!h) |
13305 | { | |
13306 | /* This *should* only be the absolute section. It could potentially | |
13307 | be that someone has defined a non-global vtable though, which | |
13308 | would be bad. It isn't worth paging in the local symbols to be | |
13309 | sure though; that case should simply be handled by the assembler. */ | |
13310 | ||
f6e332e6 | 13311 | child->vtable->parent = (struct elf_link_hash_entry *) -1; |
c152c796 AM |
13312 | } |
13313 | else | |
f6e332e6 | 13314 | child->vtable->parent = h; |
c152c796 AM |
13315 | |
13316 | return TRUE; | |
13317 | } | |
13318 | ||
13319 | /* Called from check_relocs to record the existence of a VTENTRY reloc. */ | |
13320 | ||
13321 | bfd_boolean | |
13322 | bfd_elf_gc_record_vtentry (bfd *abfd ATTRIBUTE_UNUSED, | |
13323 | asection *sec ATTRIBUTE_UNUSED, | |
13324 | struct elf_link_hash_entry *h, | |
13325 | bfd_vma addend) | |
13326 | { | |
13327 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13328 | unsigned int log_file_align = bed->s->log_file_align; | |
13329 | ||
f6e332e6 AM |
13330 | if (!h->vtable) |
13331 | { | |
ca4be51c AM |
13332 | h->vtable = ((struct elf_link_virtual_table_entry *) |
13333 | bfd_zalloc (abfd, sizeof (*h->vtable))); | |
f6e332e6 AM |
13334 | if (!h->vtable) |
13335 | return FALSE; | |
13336 | } | |
13337 | ||
13338 | if (addend >= h->vtable->size) | |
c152c796 AM |
13339 | { |
13340 | size_t size, bytes, file_align; | |
f6e332e6 | 13341 | bfd_boolean *ptr = h->vtable->used; |
c152c796 AM |
13342 | |
13343 | /* While the symbol is undefined, we have to be prepared to handle | |
13344 | a zero size. */ | |
13345 | file_align = 1 << log_file_align; | |
13346 | if (h->root.type == bfd_link_hash_undefined) | |
13347 | size = addend + file_align; | |
13348 | else | |
13349 | { | |
13350 | size = h->size; | |
13351 | if (addend >= size) | |
13352 | { | |
13353 | /* Oops! We've got a reference past the defined end of | |
13354 | the table. This is probably a bug -- shall we warn? */ | |
13355 | size = addend + file_align; | |
13356 | } | |
13357 | } | |
13358 | size = (size + file_align - 1) & -file_align; | |
13359 | ||
13360 | /* Allocate one extra entry for use as a "done" flag for the | |
13361 | consolidation pass. */ | |
13362 | bytes = ((size >> log_file_align) + 1) * sizeof (bfd_boolean); | |
13363 | ||
13364 | if (ptr) | |
13365 | { | |
a50b1753 | 13366 | ptr = (bfd_boolean *) bfd_realloc (ptr - 1, bytes); |
c152c796 AM |
13367 | |
13368 | if (ptr != NULL) | |
13369 | { | |
13370 | size_t oldbytes; | |
13371 | ||
f6e332e6 | 13372 | oldbytes = (((h->vtable->size >> log_file_align) + 1) |
c152c796 AM |
13373 | * sizeof (bfd_boolean)); |
13374 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); | |
13375 | } | |
13376 | } | |
13377 | else | |
a50b1753 | 13378 | ptr = (bfd_boolean *) bfd_zmalloc (bytes); |
c152c796 AM |
13379 | |
13380 | if (ptr == NULL) | |
13381 | return FALSE; | |
13382 | ||
13383 | /* And arrange for that done flag to be at index -1. */ | |
f6e332e6 AM |
13384 | h->vtable->used = ptr + 1; |
13385 | h->vtable->size = size; | |
c152c796 AM |
13386 | } |
13387 | ||
f6e332e6 | 13388 | h->vtable->used[addend >> log_file_align] = TRUE; |
c152c796 AM |
13389 | |
13390 | return TRUE; | |
13391 | } | |
13392 | ||
ae17ab41 CM |
13393 | /* Map an ELF section header flag to its corresponding string. */ |
13394 | typedef struct | |
13395 | { | |
13396 | char *flag_name; | |
13397 | flagword flag_value; | |
13398 | } elf_flags_to_name_table; | |
13399 | ||
13400 | static elf_flags_to_name_table elf_flags_to_names [] = | |
13401 | { | |
13402 | { "SHF_WRITE", SHF_WRITE }, | |
13403 | { "SHF_ALLOC", SHF_ALLOC }, | |
13404 | { "SHF_EXECINSTR", SHF_EXECINSTR }, | |
13405 | { "SHF_MERGE", SHF_MERGE }, | |
13406 | { "SHF_STRINGS", SHF_STRINGS }, | |
13407 | { "SHF_INFO_LINK", SHF_INFO_LINK}, | |
13408 | { "SHF_LINK_ORDER", SHF_LINK_ORDER}, | |
13409 | { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING}, | |
13410 | { "SHF_GROUP", SHF_GROUP }, | |
13411 | { "SHF_TLS", SHF_TLS }, | |
13412 | { "SHF_MASKOS", SHF_MASKOS }, | |
13413 | { "SHF_EXCLUDE", SHF_EXCLUDE }, | |
13414 | }; | |
13415 | ||
b9c361e0 JL |
13416 | /* Returns TRUE if the section is to be included, otherwise FALSE. */ |
13417 | bfd_boolean | |
ae17ab41 | 13418 | bfd_elf_lookup_section_flags (struct bfd_link_info *info, |
8b127cbc | 13419 | struct flag_info *flaginfo, |
b9c361e0 | 13420 | asection *section) |
ae17ab41 | 13421 | { |
8b127cbc | 13422 | const bfd_vma sh_flags = elf_section_flags (section); |
ae17ab41 | 13423 | |
8b127cbc | 13424 | if (!flaginfo->flags_initialized) |
ae17ab41 | 13425 | { |
8b127cbc AM |
13426 | bfd *obfd = info->output_bfd; |
13427 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
13428 | struct flag_info_list *tf = flaginfo->flag_list; | |
b9c361e0 JL |
13429 | int with_hex = 0; |
13430 | int without_hex = 0; | |
13431 | ||
8b127cbc | 13432 | for (tf = flaginfo->flag_list; tf != NULL; tf = tf->next) |
ae17ab41 | 13433 | { |
b9c361e0 | 13434 | unsigned i; |
8b127cbc | 13435 | flagword (*lookup) (char *); |
ae17ab41 | 13436 | |
8b127cbc AM |
13437 | lookup = bed->elf_backend_lookup_section_flags_hook; |
13438 | if (lookup != NULL) | |
ae17ab41 | 13439 | { |
8b127cbc | 13440 | flagword hexval = (*lookup) ((char *) tf->name); |
b9c361e0 JL |
13441 | |
13442 | if (hexval != 0) | |
13443 | { | |
13444 | if (tf->with == with_flags) | |
13445 | with_hex |= hexval; | |
13446 | else if (tf->with == without_flags) | |
13447 | without_hex |= hexval; | |
13448 | tf->valid = TRUE; | |
13449 | continue; | |
13450 | } | |
ae17ab41 | 13451 | } |
8b127cbc | 13452 | for (i = 0; i < ARRAY_SIZE (elf_flags_to_names); ++i) |
ae17ab41 | 13453 | { |
8b127cbc | 13454 | if (strcmp (tf->name, elf_flags_to_names[i].flag_name) == 0) |
b9c361e0 JL |
13455 | { |
13456 | if (tf->with == with_flags) | |
13457 | with_hex |= elf_flags_to_names[i].flag_value; | |
13458 | else if (tf->with == without_flags) | |
13459 | without_hex |= elf_flags_to_names[i].flag_value; | |
13460 | tf->valid = TRUE; | |
13461 | break; | |
13462 | } | |
13463 | } | |
8b127cbc | 13464 | if (!tf->valid) |
b9c361e0 | 13465 | { |
68ffbac6 | 13466 | info->callbacks->einfo |
8b127cbc | 13467 | (_("Unrecognized INPUT_SECTION_FLAG %s\n"), tf->name); |
b9c361e0 | 13468 | return FALSE; |
ae17ab41 CM |
13469 | } |
13470 | } | |
8b127cbc AM |
13471 | flaginfo->flags_initialized = TRUE; |
13472 | flaginfo->only_with_flags |= with_hex; | |
13473 | flaginfo->not_with_flags |= without_hex; | |
ae17ab41 | 13474 | } |
ae17ab41 | 13475 | |
8b127cbc | 13476 | if ((flaginfo->only_with_flags & sh_flags) != flaginfo->only_with_flags) |
b9c361e0 JL |
13477 | return FALSE; |
13478 | ||
8b127cbc | 13479 | if ((flaginfo->not_with_flags & sh_flags) != 0) |
b9c361e0 JL |
13480 | return FALSE; |
13481 | ||
13482 | return TRUE; | |
ae17ab41 CM |
13483 | } |
13484 | ||
c152c796 AM |
13485 | struct alloc_got_off_arg { |
13486 | bfd_vma gotoff; | |
10455f89 | 13487 | struct bfd_link_info *info; |
c152c796 AM |
13488 | }; |
13489 | ||
13490 | /* We need a special top-level link routine to convert got reference counts | |
13491 | to real got offsets. */ | |
13492 | ||
13493 | static bfd_boolean | |
13494 | elf_gc_allocate_got_offsets (struct elf_link_hash_entry *h, void *arg) | |
13495 | { | |
a50b1753 | 13496 | struct alloc_got_off_arg *gofarg = (struct alloc_got_off_arg *) arg; |
10455f89 HPN |
13497 | bfd *obfd = gofarg->info->output_bfd; |
13498 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
c152c796 | 13499 | |
c152c796 AM |
13500 | if (h->got.refcount > 0) |
13501 | { | |
13502 | h->got.offset = gofarg->gotoff; | |
10455f89 | 13503 | gofarg->gotoff += bed->got_elt_size (obfd, gofarg->info, h, NULL, 0); |
c152c796 AM |
13504 | } |
13505 | else | |
13506 | h->got.offset = (bfd_vma) -1; | |
13507 | ||
13508 | return TRUE; | |
13509 | } | |
13510 | ||
13511 | /* And an accompanying bit to work out final got entry offsets once | |
13512 | we're done. Should be called from final_link. */ | |
13513 | ||
13514 | bfd_boolean | |
13515 | bfd_elf_gc_common_finalize_got_offsets (bfd *abfd, | |
13516 | struct bfd_link_info *info) | |
13517 | { | |
13518 | bfd *i; | |
13519 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13520 | bfd_vma gotoff; | |
c152c796 AM |
13521 | struct alloc_got_off_arg gofarg; |
13522 | ||
10455f89 HPN |
13523 | BFD_ASSERT (abfd == info->output_bfd); |
13524 | ||
c152c796 AM |
13525 | if (! is_elf_hash_table (info->hash)) |
13526 | return FALSE; | |
13527 | ||
13528 | /* The GOT offset is relative to the .got section, but the GOT header is | |
13529 | put into the .got.plt section, if the backend uses it. */ | |
13530 | if (bed->want_got_plt) | |
13531 | gotoff = 0; | |
13532 | else | |
13533 | gotoff = bed->got_header_size; | |
13534 | ||
13535 | /* Do the local .got entries first. */ | |
c72f2fb2 | 13536 | for (i = info->input_bfds; i; i = i->link.next) |
c152c796 AM |
13537 | { |
13538 | bfd_signed_vma *local_got; | |
ef53be89 | 13539 | size_t j, locsymcount; |
c152c796 AM |
13540 | Elf_Internal_Shdr *symtab_hdr; |
13541 | ||
13542 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) | |
13543 | continue; | |
13544 | ||
13545 | local_got = elf_local_got_refcounts (i); | |
13546 | if (!local_got) | |
13547 | continue; | |
13548 | ||
13549 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
13550 | if (elf_bad_symtab (i)) | |
13551 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
13552 | else | |
13553 | locsymcount = symtab_hdr->sh_info; | |
13554 | ||
13555 | for (j = 0; j < locsymcount; ++j) | |
13556 | { | |
13557 | if (local_got[j] > 0) | |
13558 | { | |
13559 | local_got[j] = gotoff; | |
10455f89 | 13560 | gotoff += bed->got_elt_size (abfd, info, NULL, i, j); |
c152c796 AM |
13561 | } |
13562 | else | |
13563 | local_got[j] = (bfd_vma) -1; | |
13564 | } | |
13565 | } | |
13566 | ||
13567 | /* Then the global .got entries. .plt refcounts are handled by | |
13568 | adjust_dynamic_symbol */ | |
13569 | gofarg.gotoff = gotoff; | |
10455f89 | 13570 | gofarg.info = info; |
c152c796 AM |
13571 | elf_link_hash_traverse (elf_hash_table (info), |
13572 | elf_gc_allocate_got_offsets, | |
13573 | &gofarg); | |
13574 | return TRUE; | |
13575 | } | |
13576 | ||
13577 | /* Many folk need no more in the way of final link than this, once | |
13578 | got entry reference counting is enabled. */ | |
13579 | ||
13580 | bfd_boolean | |
13581 | bfd_elf_gc_common_final_link (bfd *abfd, struct bfd_link_info *info) | |
13582 | { | |
13583 | if (!bfd_elf_gc_common_finalize_got_offsets (abfd, info)) | |
13584 | return FALSE; | |
13585 | ||
13586 | /* Invoke the regular ELF backend linker to do all the work. */ | |
13587 | return bfd_elf_final_link (abfd, info); | |
13588 | } | |
13589 | ||
13590 | bfd_boolean | |
13591 | bfd_elf_reloc_symbol_deleted_p (bfd_vma offset, void *cookie) | |
13592 | { | |
a50b1753 | 13593 | struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie; |
c152c796 AM |
13594 | |
13595 | if (rcookie->bad_symtab) | |
13596 | rcookie->rel = rcookie->rels; | |
13597 | ||
13598 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
13599 | { | |
13600 | unsigned long r_symndx; | |
13601 | ||
13602 | if (! rcookie->bad_symtab) | |
13603 | if (rcookie->rel->r_offset > offset) | |
13604 | return FALSE; | |
13605 | if (rcookie->rel->r_offset != offset) | |
13606 | continue; | |
13607 | ||
13608 | r_symndx = rcookie->rel->r_info >> rcookie->r_sym_shift; | |
2c2fa401 | 13609 | if (r_symndx == STN_UNDEF) |
c152c796 AM |
13610 | return TRUE; |
13611 | ||
13612 | if (r_symndx >= rcookie->locsymcount | |
13613 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
13614 | { | |
13615 | struct elf_link_hash_entry *h; | |
13616 | ||
13617 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
13618 | ||
13619 | while (h->root.type == bfd_link_hash_indirect | |
13620 | || h->root.type == bfd_link_hash_warning) | |
13621 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
13622 | ||
13623 | if ((h->root.type == bfd_link_hash_defined | |
13624 | || h->root.type == bfd_link_hash_defweak) | |
5b69e357 AM |
13625 | && (h->root.u.def.section->owner != rcookie->abfd |
13626 | || h->root.u.def.section->kept_section != NULL | |
13627 | || discarded_section (h->root.u.def.section))) | |
c152c796 | 13628 | return TRUE; |
c152c796 AM |
13629 | } |
13630 | else | |
13631 | { | |
13632 | /* It's not a relocation against a global symbol, | |
13633 | but it could be a relocation against a local | |
13634 | symbol for a discarded section. */ | |
13635 | asection *isec; | |
13636 | Elf_Internal_Sym *isym; | |
13637 | ||
13638 | /* Need to: get the symbol; get the section. */ | |
13639 | isym = &rcookie->locsyms[r_symndx]; | |
cb33740c | 13640 | isec = bfd_section_from_elf_index (rcookie->abfd, isym->st_shndx); |
5b69e357 AM |
13641 | if (isec != NULL |
13642 | && (isec->kept_section != NULL | |
13643 | || discarded_section (isec))) | |
cb33740c | 13644 | return TRUE; |
c152c796 AM |
13645 | } |
13646 | return FALSE; | |
13647 | } | |
13648 | return FALSE; | |
13649 | } | |
13650 | ||
13651 | /* Discard unneeded references to discarded sections. | |
75938853 AM |
13652 | Returns -1 on error, 1 if any section's size was changed, 0 if |
13653 | nothing changed. This function assumes that the relocations are in | |
13654 | sorted order, which is true for all known assemblers. */ | |
c152c796 | 13655 | |
75938853 | 13656 | int |
c152c796 AM |
13657 | bfd_elf_discard_info (bfd *output_bfd, struct bfd_link_info *info) |
13658 | { | |
13659 | struct elf_reloc_cookie cookie; | |
18cd5bce | 13660 | asection *o; |
c152c796 | 13661 | bfd *abfd; |
75938853 | 13662 | int changed = 0; |
c152c796 AM |
13663 | |
13664 | if (info->traditional_format | |
13665 | || !is_elf_hash_table (info->hash)) | |
75938853 | 13666 | return 0; |
c152c796 | 13667 | |
18cd5bce AM |
13668 | o = bfd_get_section_by_name (output_bfd, ".stab"); |
13669 | if (o != NULL) | |
c152c796 | 13670 | { |
18cd5bce | 13671 | asection *i; |
c152c796 | 13672 | |
18cd5bce | 13673 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
8da3dbc5 | 13674 | { |
18cd5bce AM |
13675 | if (i->size == 0 |
13676 | || i->reloc_count == 0 | |
13677 | || i->sec_info_type != SEC_INFO_TYPE_STABS) | |
13678 | continue; | |
c152c796 | 13679 | |
18cd5bce AM |
13680 | abfd = i->owner; |
13681 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
13682 | continue; | |
c152c796 | 13683 | |
18cd5bce | 13684 | if (!init_reloc_cookie_for_section (&cookie, info, i)) |
75938853 | 13685 | return -1; |
c152c796 | 13686 | |
18cd5bce AM |
13687 | if (_bfd_discard_section_stabs (abfd, i, |
13688 | elf_section_data (i)->sec_info, | |
5241d853 RS |
13689 | bfd_elf_reloc_symbol_deleted_p, |
13690 | &cookie)) | |
75938853 | 13691 | changed = 1; |
18cd5bce AM |
13692 | |
13693 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 13694 | } |
18cd5bce AM |
13695 | } |
13696 | ||
2f0c68f2 CM |
13697 | o = NULL; |
13698 | if (info->eh_frame_hdr_type != COMPACT_EH_HDR) | |
13699 | o = bfd_get_section_by_name (output_bfd, ".eh_frame"); | |
18cd5bce AM |
13700 | if (o != NULL) |
13701 | { | |
13702 | asection *i; | |
c152c796 | 13703 | |
18cd5bce | 13704 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
c152c796 | 13705 | { |
18cd5bce AM |
13706 | if (i->size == 0) |
13707 | continue; | |
13708 | ||
13709 | abfd = i->owner; | |
13710 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
13711 | continue; | |
13712 | ||
13713 | if (!init_reloc_cookie_for_section (&cookie, info, i)) | |
75938853 | 13714 | return -1; |
18cd5bce AM |
13715 | |
13716 | _bfd_elf_parse_eh_frame (abfd, info, i, &cookie); | |
13717 | if (_bfd_elf_discard_section_eh_frame (abfd, info, i, | |
c152c796 AM |
13718 | bfd_elf_reloc_symbol_deleted_p, |
13719 | &cookie)) | |
75938853 | 13720 | changed = 1; |
18cd5bce AM |
13721 | |
13722 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 13723 | } |
18cd5bce | 13724 | } |
c152c796 | 13725 | |
18cd5bce AM |
13726 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next) |
13727 | { | |
13728 | const struct elf_backend_data *bed; | |
c152c796 | 13729 | |
18cd5bce AM |
13730 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
13731 | continue; | |
13732 | ||
13733 | bed = get_elf_backend_data (abfd); | |
13734 | ||
13735 | if (bed->elf_backend_discard_info != NULL) | |
13736 | { | |
13737 | if (!init_reloc_cookie (&cookie, info, abfd)) | |
75938853 | 13738 | return -1; |
18cd5bce AM |
13739 | |
13740 | if ((*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
75938853 | 13741 | changed = 1; |
18cd5bce AM |
13742 | |
13743 | fini_reloc_cookie (&cookie, abfd); | |
13744 | } | |
c152c796 AM |
13745 | } |
13746 | ||
2f0c68f2 CM |
13747 | if (info->eh_frame_hdr_type == COMPACT_EH_HDR) |
13748 | _bfd_elf_end_eh_frame_parsing (info); | |
13749 | ||
13750 | if (info->eh_frame_hdr_type | |
0e1862bb | 13751 | && !bfd_link_relocatable (info) |
c152c796 | 13752 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) |
75938853 | 13753 | changed = 1; |
c152c796 | 13754 | |
75938853 | 13755 | return changed; |
c152c796 | 13756 | } |
082b7297 | 13757 | |
43e1669b | 13758 | bfd_boolean |
0c511000 | 13759 | _bfd_elf_section_already_linked (bfd *abfd, |
c77ec726 | 13760 | asection *sec, |
c0f00686 | 13761 | struct bfd_link_info *info) |
082b7297 L |
13762 | { |
13763 | flagword flags; | |
c77ec726 | 13764 | const char *name, *key; |
082b7297 L |
13765 | struct bfd_section_already_linked *l; |
13766 | struct bfd_section_already_linked_hash_entry *already_linked_list; | |
0c511000 | 13767 | |
c77ec726 AM |
13768 | if (sec->output_section == bfd_abs_section_ptr) |
13769 | return FALSE; | |
0c511000 | 13770 | |
c77ec726 | 13771 | flags = sec->flags; |
0c511000 | 13772 | |
c77ec726 AM |
13773 | /* Return if it isn't a linkonce section. A comdat group section |
13774 | also has SEC_LINK_ONCE set. */ | |
13775 | if ((flags & SEC_LINK_ONCE) == 0) | |
13776 | return FALSE; | |
0c511000 | 13777 | |
c77ec726 AM |
13778 | /* Don't put group member sections on our list of already linked |
13779 | sections. They are handled as a group via their group section. */ | |
13780 | if (elf_sec_group (sec) != NULL) | |
13781 | return FALSE; | |
0c511000 | 13782 | |
c77ec726 AM |
13783 | /* For a SHT_GROUP section, use the group signature as the key. */ |
13784 | name = sec->name; | |
13785 | if ((flags & SEC_GROUP) != 0 | |
13786 | && elf_next_in_group (sec) != NULL | |
13787 | && elf_group_name (elf_next_in_group (sec)) != NULL) | |
13788 | key = elf_group_name (elf_next_in_group (sec)); | |
13789 | else | |
13790 | { | |
13791 | /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */ | |
0c511000 | 13792 | if (CONST_STRNEQ (name, ".gnu.linkonce.") |
c77ec726 AM |
13793 | && (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL) |
13794 | key++; | |
0c511000 | 13795 | else |
c77ec726 AM |
13796 | /* Must be a user linkonce section that doesn't follow gcc's |
13797 | naming convention. In this case we won't be matching | |
13798 | single member groups. */ | |
13799 | key = name; | |
0c511000 | 13800 | } |
6d2cd210 | 13801 | |
c77ec726 | 13802 | already_linked_list = bfd_section_already_linked_table_lookup (key); |
082b7297 L |
13803 | |
13804 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13805 | { | |
c2370991 | 13806 | /* We may have 2 different types of sections on the list: group |
c77ec726 AM |
13807 | sections with a signature of <key> (<key> is some string), |
13808 | and linkonce sections named .gnu.linkonce.<type>.<key>. | |
13809 | Match like sections. LTO plugin sections are an exception. | |
13810 | They are always named .gnu.linkonce.t.<key> and match either | |
13811 | type of section. */ | |
13812 | if (((flags & SEC_GROUP) == (l->sec->flags & SEC_GROUP) | |
13813 | && ((flags & SEC_GROUP) != 0 | |
13814 | || strcmp (name, l->sec->name) == 0)) | |
13815 | || (l->sec->owner->flags & BFD_PLUGIN) != 0) | |
082b7297 L |
13816 | { |
13817 | /* The section has already been linked. See if we should | |
6d2cd210 | 13818 | issue a warning. */ |
c77ec726 AM |
13819 | if (!_bfd_handle_already_linked (sec, l, info)) |
13820 | return FALSE; | |
082b7297 | 13821 | |
c77ec726 | 13822 | if (flags & SEC_GROUP) |
3d7f7666 | 13823 | { |
c77ec726 AM |
13824 | asection *first = elf_next_in_group (sec); |
13825 | asection *s = first; | |
3d7f7666 | 13826 | |
c77ec726 | 13827 | while (s != NULL) |
3d7f7666 | 13828 | { |
c77ec726 AM |
13829 | s->output_section = bfd_abs_section_ptr; |
13830 | /* Record which group discards it. */ | |
13831 | s->kept_section = l->sec; | |
13832 | s = elf_next_in_group (s); | |
13833 | /* These lists are circular. */ | |
13834 | if (s == first) | |
13835 | break; | |
3d7f7666 L |
13836 | } |
13837 | } | |
082b7297 | 13838 | |
43e1669b | 13839 | return TRUE; |
082b7297 L |
13840 | } |
13841 | } | |
13842 | ||
c77ec726 AM |
13843 | /* A single member comdat group section may be discarded by a |
13844 | linkonce section and vice versa. */ | |
13845 | if ((flags & SEC_GROUP) != 0) | |
3d7f7666 | 13846 | { |
c77ec726 | 13847 | asection *first = elf_next_in_group (sec); |
c2370991 | 13848 | |
c77ec726 AM |
13849 | if (first != NULL && elf_next_in_group (first) == first) |
13850 | /* Check this single member group against linkonce sections. */ | |
13851 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13852 | if ((l->sec->flags & SEC_GROUP) == 0 | |
13853 | && bfd_elf_match_symbols_in_sections (l->sec, first, info)) | |
13854 | { | |
13855 | first->output_section = bfd_abs_section_ptr; | |
13856 | first->kept_section = l->sec; | |
13857 | sec->output_section = bfd_abs_section_ptr; | |
13858 | break; | |
13859 | } | |
13860 | } | |
13861 | else | |
13862 | /* Check this linkonce section against single member groups. */ | |
13863 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13864 | if (l->sec->flags & SEC_GROUP) | |
6d2cd210 | 13865 | { |
c77ec726 | 13866 | asection *first = elf_next_in_group (l->sec); |
6d2cd210 | 13867 | |
c77ec726 AM |
13868 | if (first != NULL |
13869 | && elf_next_in_group (first) == first | |
13870 | && bfd_elf_match_symbols_in_sections (first, sec, info)) | |
13871 | { | |
13872 | sec->output_section = bfd_abs_section_ptr; | |
13873 | sec->kept_section = first; | |
13874 | break; | |
13875 | } | |
6d2cd210 | 13876 | } |
0c511000 | 13877 | |
c77ec726 AM |
13878 | /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F' |
13879 | referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4 | |
13880 | specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce' | |
13881 | prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its | |
13882 | matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded | |
13883 | but its `.gnu.linkonce.t.F' is discarded means we chose one-only | |
13884 | `.gnu.linkonce.t.F' section from a different bfd not requiring any | |
13885 | `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded. | |
13886 | The reverse order cannot happen as there is never a bfd with only the | |
13887 | `.gnu.linkonce.r.F' section. The order of sections in a bfd does not | |
13888 | matter as here were are looking only for cross-bfd sections. */ | |
13889 | ||
13890 | if ((flags & SEC_GROUP) == 0 && CONST_STRNEQ (name, ".gnu.linkonce.r.")) | |
13891 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13892 | if ((l->sec->flags & SEC_GROUP) == 0 | |
13893 | && CONST_STRNEQ (l->sec->name, ".gnu.linkonce.t.")) | |
13894 | { | |
13895 | if (abfd != l->sec->owner) | |
13896 | sec->output_section = bfd_abs_section_ptr; | |
13897 | break; | |
13898 | } | |
80c29487 | 13899 | |
082b7297 | 13900 | /* This is the first section with this name. Record it. */ |
c77ec726 | 13901 | if (!bfd_section_already_linked_table_insert (already_linked_list, sec)) |
bb6198d2 | 13902 | info->callbacks->einfo (_("%F%P: already_linked_table: %E\n")); |
c77ec726 | 13903 | return sec->output_section == bfd_abs_section_ptr; |
082b7297 | 13904 | } |
81e1b023 | 13905 | |
a4d8e49b L |
13906 | bfd_boolean |
13907 | _bfd_elf_common_definition (Elf_Internal_Sym *sym) | |
13908 | { | |
13909 | return sym->st_shndx == SHN_COMMON; | |
13910 | } | |
13911 | ||
13912 | unsigned int | |
13913 | _bfd_elf_common_section_index (asection *sec ATTRIBUTE_UNUSED) | |
13914 | { | |
13915 | return SHN_COMMON; | |
13916 | } | |
13917 | ||
13918 | asection * | |
13919 | _bfd_elf_common_section (asection *sec ATTRIBUTE_UNUSED) | |
13920 | { | |
13921 | return bfd_com_section_ptr; | |
13922 | } | |
10455f89 HPN |
13923 | |
13924 | bfd_vma | |
13925 | _bfd_elf_default_got_elt_size (bfd *abfd, | |
13926 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
13927 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, | |
13928 | bfd *ibfd ATTRIBUTE_UNUSED, | |
13929 | unsigned long symndx ATTRIBUTE_UNUSED) | |
13930 | { | |
13931 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13932 | return bed->s->arch_size / 8; | |
13933 | } | |
83bac4b0 NC |
13934 | |
13935 | /* Routines to support the creation of dynamic relocs. */ | |
13936 | ||
83bac4b0 NC |
13937 | /* Returns the name of the dynamic reloc section associated with SEC. */ |
13938 | ||
13939 | static const char * | |
13940 | get_dynamic_reloc_section_name (bfd * abfd, | |
13941 | asection * sec, | |
13942 | bfd_boolean is_rela) | |
13943 | { | |
ddcf1fcf BS |
13944 | char *name; |
13945 | const char *old_name = bfd_get_section_name (NULL, sec); | |
13946 | const char *prefix = is_rela ? ".rela" : ".rel"; | |
83bac4b0 | 13947 | |
ddcf1fcf | 13948 | if (old_name == NULL) |
83bac4b0 NC |
13949 | return NULL; |
13950 | ||
ddcf1fcf | 13951 | name = bfd_alloc (abfd, strlen (prefix) + strlen (old_name) + 1); |
68ffbac6 | 13952 | sprintf (name, "%s%s", prefix, old_name); |
83bac4b0 NC |
13953 | |
13954 | return name; | |
13955 | } | |
13956 | ||
13957 | /* Returns the dynamic reloc section associated with SEC. | |
13958 | If necessary compute the name of the dynamic reloc section based | |
13959 | on SEC's name (looked up in ABFD's string table) and the setting | |
13960 | of IS_RELA. */ | |
13961 | ||
13962 | asection * | |
13963 | _bfd_elf_get_dynamic_reloc_section (bfd * abfd, | |
13964 | asection * sec, | |
13965 | bfd_boolean is_rela) | |
13966 | { | |
13967 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
13968 | ||
13969 | if (reloc_sec == NULL) | |
13970 | { | |
13971 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
13972 | ||
13973 | if (name != NULL) | |
13974 | { | |
3d4d4302 | 13975 | reloc_sec = bfd_get_linker_section (abfd, name); |
83bac4b0 NC |
13976 | |
13977 | if (reloc_sec != NULL) | |
13978 | elf_section_data (sec)->sreloc = reloc_sec; | |
13979 | } | |
13980 | } | |
13981 | ||
13982 | return reloc_sec; | |
13983 | } | |
13984 | ||
13985 | /* Returns the dynamic reloc section associated with SEC. If the | |
13986 | section does not exist it is created and attached to the DYNOBJ | |
13987 | bfd and stored in the SRELOC field of SEC's elf_section_data | |
13988 | structure. | |
f8076f98 | 13989 | |
83bac4b0 NC |
13990 | ALIGNMENT is the alignment for the newly created section and |
13991 | IS_RELA defines whether the name should be .rela.<SEC's name> | |
13992 | or .rel.<SEC's name>. The section name is looked up in the | |
13993 | string table associated with ABFD. */ | |
13994 | ||
13995 | asection * | |
ca4be51c AM |
13996 | _bfd_elf_make_dynamic_reloc_section (asection *sec, |
13997 | bfd *dynobj, | |
13998 | unsigned int alignment, | |
13999 | bfd *abfd, | |
14000 | bfd_boolean is_rela) | |
83bac4b0 NC |
14001 | { |
14002 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
14003 | ||
14004 | if (reloc_sec == NULL) | |
14005 | { | |
14006 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
14007 | ||
14008 | if (name == NULL) | |
14009 | return NULL; | |
14010 | ||
3d4d4302 | 14011 | reloc_sec = bfd_get_linker_section (dynobj, name); |
83bac4b0 NC |
14012 | |
14013 | if (reloc_sec == NULL) | |
14014 | { | |
3d4d4302 AM |
14015 | flagword flags = (SEC_HAS_CONTENTS | SEC_READONLY |
14016 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
83bac4b0 NC |
14017 | if ((sec->flags & SEC_ALLOC) != 0) |
14018 | flags |= SEC_ALLOC | SEC_LOAD; | |
14019 | ||
3d4d4302 | 14020 | reloc_sec = bfd_make_section_anyway_with_flags (dynobj, name, flags); |
83bac4b0 NC |
14021 | if (reloc_sec != NULL) |
14022 | { | |
8877b5e5 AM |
14023 | /* _bfd_elf_get_sec_type_attr chooses a section type by |
14024 | name. Override as it may be wrong, eg. for a user | |
14025 | section named "auto" we'll get ".relauto" which is | |
14026 | seen to be a .rela section. */ | |
14027 | elf_section_type (reloc_sec) = is_rela ? SHT_RELA : SHT_REL; | |
83bac4b0 NC |
14028 | if (! bfd_set_section_alignment (dynobj, reloc_sec, alignment)) |
14029 | reloc_sec = NULL; | |
14030 | } | |
14031 | } | |
14032 | ||
14033 | elf_section_data (sec)->sreloc = reloc_sec; | |
14034 | } | |
14035 | ||
14036 | return reloc_sec; | |
14037 | } | |
1338dd10 | 14038 | |
bffebb6b AM |
14039 | /* Copy the ELF symbol type and other attributes for a linker script |
14040 | assignment from HSRC to HDEST. Generally this should be treated as | |
14041 | if we found a strong non-dynamic definition for HDEST (except that | |
14042 | ld ignores multiple definition errors). */ | |
1338dd10 | 14043 | void |
bffebb6b AM |
14044 | _bfd_elf_copy_link_hash_symbol_type (bfd *abfd, |
14045 | struct bfd_link_hash_entry *hdest, | |
14046 | struct bfd_link_hash_entry *hsrc) | |
1338dd10 | 14047 | { |
bffebb6b AM |
14048 | struct elf_link_hash_entry *ehdest = (struct elf_link_hash_entry *) hdest; |
14049 | struct elf_link_hash_entry *ehsrc = (struct elf_link_hash_entry *) hsrc; | |
14050 | Elf_Internal_Sym isym; | |
1338dd10 PB |
14051 | |
14052 | ehdest->type = ehsrc->type; | |
35fc36a8 | 14053 | ehdest->target_internal = ehsrc->target_internal; |
bffebb6b AM |
14054 | |
14055 | isym.st_other = ehsrc->other; | |
b8417128 | 14056 | elf_merge_st_other (abfd, ehdest, &isym, NULL, TRUE, FALSE); |
1338dd10 | 14057 | } |
351f65ca L |
14058 | |
14059 | /* Append a RELA relocation REL to section S in BFD. */ | |
14060 | ||
14061 | void | |
14062 | elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
14063 | { | |
14064 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14065 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); | |
14066 | BFD_ASSERT (loc + bed->s->sizeof_rela <= s->contents + s->size); | |
14067 | bed->s->swap_reloca_out (abfd, rel, loc); | |
14068 | } | |
14069 | ||
14070 | /* Append a REL relocation REL to section S in BFD. */ | |
14071 | ||
14072 | void | |
14073 | elf_append_rel (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
14074 | { | |
14075 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14076 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rel); | |
14077 | BFD_ASSERT (loc + bed->s->sizeof_rel <= s->contents + s->size); | |
59d6ffb2 | 14078 | bed->s->swap_reloc_out (abfd, rel, loc); |
351f65ca | 14079 | } |