Commit | Line | Data |
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252b5132 | 1 | /* ELF linking support for BFD. |
b3adc24a | 2 | Copyright (C) 1995-2020 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" |
252b5132 RH |
23 | #include "bfdlink.h" |
24 | #include "libbfd.h" | |
25 | #define ARCH_SIZE 0 | |
26 | #include "elf-bfd.h" | |
4ad4eba5 | 27 | #include "safe-ctype.h" |
ccf2f652 | 28 | #include "libiberty.h" |
66eb6687 | 29 | #include "objalloc.h" |
08ce1d72 | 30 | #if BFD_SUPPORTS_PLUGINS |
7d0b9ebc | 31 | #include "plugin-api.h" |
7dc3990e L |
32 | #include "plugin.h" |
33 | #endif | |
252b5132 | 34 | |
4b69ce9b AM |
35 | #ifdef HAVE_LIMITS_H |
36 | #include <limits.h> | |
37 | #endif | |
38 | #ifndef CHAR_BIT | |
39 | #define CHAR_BIT 8 | |
40 | #endif | |
41 | ||
28caa186 AM |
42 | /* This struct is used to pass information to routines called via |
43 | elf_link_hash_traverse which must return failure. */ | |
44 | ||
45 | struct elf_info_failed | |
46 | { | |
47 | struct bfd_link_info *info; | |
28caa186 AM |
48 | bfd_boolean failed; |
49 | }; | |
50 | ||
51 | /* This structure is used to pass information to | |
52 | _bfd_elf_link_find_version_dependencies. */ | |
53 | ||
54 | struct elf_find_verdep_info | |
55 | { | |
56 | /* General link information. */ | |
57 | struct bfd_link_info *info; | |
58 | /* The number of dependencies. */ | |
59 | unsigned int vers; | |
60 | /* Whether we had a failure. */ | |
61 | bfd_boolean failed; | |
62 | }; | |
63 | ||
64 | static bfd_boolean _bfd_elf_fix_symbol_flags | |
65 | (struct elf_link_hash_entry *, struct elf_info_failed *); | |
66 | ||
2f0c68f2 CM |
67 | asection * |
68 | _bfd_elf_section_for_symbol (struct elf_reloc_cookie *cookie, | |
69 | unsigned long r_symndx, | |
70 | bfd_boolean discard) | |
71 | { | |
72 | if (r_symndx >= cookie->locsymcount | |
73 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
74 | { | |
75 | struct elf_link_hash_entry *h; | |
76 | ||
77 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; | |
78 | ||
79 | while (h->root.type == bfd_link_hash_indirect | |
80 | || h->root.type == bfd_link_hash_warning) | |
81 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
82 | ||
83 | if ((h->root.type == bfd_link_hash_defined | |
84 | || h->root.type == bfd_link_hash_defweak) | |
85 | && discarded_section (h->root.u.def.section)) | |
07d6d2b8 | 86 | return h->root.u.def.section; |
2f0c68f2 CM |
87 | else |
88 | return NULL; | |
89 | } | |
90 | else | |
91 | { | |
92 | /* It's not a relocation against a global symbol, | |
93 | but it could be a relocation against a local | |
94 | symbol for a discarded section. */ | |
95 | asection *isec; | |
96 | Elf_Internal_Sym *isym; | |
97 | ||
98 | /* Need to: get the symbol; get the section. */ | |
99 | isym = &cookie->locsyms[r_symndx]; | |
100 | isec = bfd_section_from_elf_index (cookie->abfd, isym->st_shndx); | |
101 | if (isec != NULL | |
102 | && discard ? discarded_section (isec) : 1) | |
103 | return isec; | |
104 | } | |
105 | return NULL; | |
106 | } | |
107 | ||
d98685ac AM |
108 | /* Define a symbol in a dynamic linkage section. */ |
109 | ||
110 | struct elf_link_hash_entry * | |
111 | _bfd_elf_define_linkage_sym (bfd *abfd, | |
112 | struct bfd_link_info *info, | |
113 | asection *sec, | |
114 | const char *name) | |
115 | { | |
116 | struct elf_link_hash_entry *h; | |
117 | struct bfd_link_hash_entry *bh; | |
ccabcbe5 | 118 | const struct elf_backend_data *bed; |
d98685ac AM |
119 | |
120 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, FALSE); | |
121 | if (h != NULL) | |
122 | { | |
123 | /* Zap symbol defined in an as-needed lib that wasn't linked. | |
124 | This is a symptom of a larger problem: Absolute symbols | |
125 | defined in shared libraries can't be overridden, because we | |
126 | lose the link to the bfd which is via the symbol section. */ | |
127 | h->root.type = bfd_link_hash_new; | |
ad32986f | 128 | bh = &h->root; |
d98685ac | 129 | } |
ad32986f NC |
130 | else |
131 | bh = NULL; | |
d98685ac | 132 | |
cf18fda4 | 133 | bed = get_elf_backend_data (abfd); |
d98685ac | 134 | if (!_bfd_generic_link_add_one_symbol (info, abfd, name, BSF_GLOBAL, |
cf18fda4 | 135 | sec, 0, NULL, FALSE, bed->collect, |
d98685ac AM |
136 | &bh)) |
137 | return NULL; | |
138 | h = (struct elf_link_hash_entry *) bh; | |
ad32986f | 139 | BFD_ASSERT (h != NULL); |
d98685ac | 140 | h->def_regular = 1; |
e28df02b | 141 | h->non_elf = 0; |
12b2843a | 142 | h->root.linker_def = 1; |
d98685ac | 143 | h->type = STT_OBJECT; |
00b7642b AM |
144 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
145 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
d98685ac | 146 | |
ccabcbe5 | 147 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
d98685ac AM |
148 | return h; |
149 | } | |
150 | ||
b34976b6 | 151 | bfd_boolean |
268b6b39 | 152 | _bfd_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
252b5132 RH |
153 | { |
154 | flagword flags; | |
aad5d350 | 155 | asection *s; |
252b5132 | 156 | struct elf_link_hash_entry *h; |
9c5bfbb7 | 157 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 158 | struct elf_link_hash_table *htab = elf_hash_table (info); |
252b5132 RH |
159 | |
160 | /* This function may be called more than once. */ | |
ce558b89 | 161 | if (htab->sgot != NULL) |
b34976b6 | 162 | return TRUE; |
252b5132 | 163 | |
e5a52504 | 164 | flags = bed->dynamic_sec_flags; |
252b5132 | 165 | |
14b2f831 AM |
166 | s = bfd_make_section_anyway_with_flags (abfd, |
167 | (bed->rela_plts_and_copies_p | |
168 | ? ".rela.got" : ".rel.got"), | |
169 | (bed->dynamic_sec_flags | |
170 | | SEC_READONLY)); | |
6de2ae4a | 171 | if (s == NULL |
fd361982 | 172 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
6de2ae4a L |
173 | return FALSE; |
174 | htab->srelgot = s; | |
252b5132 | 175 | |
14b2f831 | 176 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
64e77c6d | 177 | if (s == NULL |
fd361982 | 178 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
64e77c6d L |
179 | return FALSE; |
180 | htab->sgot = s; | |
181 | ||
252b5132 RH |
182 | if (bed->want_got_plt) |
183 | { | |
14b2f831 | 184 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
252b5132 | 185 | if (s == NULL |
fd361982 | 186 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
b34976b6 | 187 | return FALSE; |
6de2ae4a | 188 | htab->sgotplt = s; |
252b5132 RH |
189 | } |
190 | ||
64e77c6d L |
191 | /* The first bit of the global offset table is the header. */ |
192 | s->size += bed->got_header_size; | |
193 | ||
2517a57f AM |
194 | if (bed->want_got_sym) |
195 | { | |
196 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
197 | (or .got.plt) section. We don't do this in the linker script | |
198 | because we don't want to define the symbol if we are not creating | |
199 | a global offset table. */ | |
6de2ae4a L |
200 | h = _bfd_elf_define_linkage_sym (abfd, info, s, |
201 | "_GLOBAL_OFFSET_TABLE_"); | |
2517a57f | 202 | elf_hash_table (info)->hgot = h; |
d98685ac AM |
203 | if (h == NULL) |
204 | return FALSE; | |
2517a57f | 205 | } |
252b5132 | 206 | |
b34976b6 | 207 | return TRUE; |
252b5132 RH |
208 | } |
209 | \f | |
7e9f0867 AM |
210 | /* Create a strtab to hold the dynamic symbol names. */ |
211 | static bfd_boolean | |
212 | _bfd_elf_link_create_dynstrtab (bfd *abfd, struct bfd_link_info *info) | |
213 | { | |
214 | struct elf_link_hash_table *hash_table; | |
215 | ||
216 | hash_table = elf_hash_table (info); | |
217 | if (hash_table->dynobj == NULL) | |
6cd255ca L |
218 | { |
219 | /* We may not set dynobj, an input file holding linker created | |
220 | dynamic sections to abfd, which may be a dynamic object with | |
221 | its own dynamic sections. We need to find a normal input file | |
222 | to hold linker created sections if possible. */ | |
223 | if ((abfd->flags & (DYNAMIC | BFD_PLUGIN)) != 0) | |
224 | { | |
225 | bfd *ibfd; | |
57963c05 | 226 | asection *s; |
6cd255ca | 227 | for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) |
6645479e | 228 | if ((ibfd->flags |
57963c05 AM |
229 | & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0 |
230 | && bfd_get_flavour (ibfd) == bfd_target_elf_flavour | |
4de5434b | 231 | && elf_object_id (ibfd) == elf_hash_table_id (hash_table) |
57963c05 AM |
232 | && !((s = ibfd->sections) != NULL |
233 | && s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)) | |
6cd255ca L |
234 | { |
235 | abfd = ibfd; | |
236 | break; | |
237 | } | |
238 | } | |
239 | hash_table->dynobj = abfd; | |
240 | } | |
7e9f0867 AM |
241 | |
242 | if (hash_table->dynstr == NULL) | |
243 | { | |
244 | hash_table->dynstr = _bfd_elf_strtab_init (); | |
245 | if (hash_table->dynstr == NULL) | |
246 | return FALSE; | |
247 | } | |
248 | return TRUE; | |
249 | } | |
250 | ||
45d6a902 AM |
251 | /* Create some sections which will be filled in with dynamic linking |
252 | information. ABFD is an input file which requires dynamic sections | |
253 | to be created. The dynamic sections take up virtual memory space | |
254 | when the final executable is run, so we need to create them before | |
255 | addresses are assigned to the output sections. We work out the | |
256 | actual contents and size of these sections later. */ | |
252b5132 | 257 | |
b34976b6 | 258 | bfd_boolean |
268b6b39 | 259 | _bfd_elf_link_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 260 | { |
45d6a902 | 261 | flagword flags; |
91d6fa6a | 262 | asection *s; |
9c5bfbb7 | 263 | const struct elf_backend_data *bed; |
9637f6ef | 264 | struct elf_link_hash_entry *h; |
252b5132 | 265 | |
0eddce27 | 266 | if (! is_elf_hash_table (info->hash)) |
45d6a902 AM |
267 | return FALSE; |
268 | ||
269 | if (elf_hash_table (info)->dynamic_sections_created) | |
270 | return TRUE; | |
271 | ||
7e9f0867 AM |
272 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
273 | return FALSE; | |
45d6a902 | 274 | |
7e9f0867 | 275 | abfd = elf_hash_table (info)->dynobj; |
e5a52504 MM |
276 | bed = get_elf_backend_data (abfd); |
277 | ||
278 | flags = bed->dynamic_sec_flags; | |
45d6a902 AM |
279 | |
280 | /* A dynamically linked executable has a .interp section, but a | |
281 | shared library does not. */ | |
9b8b325a | 282 | if (bfd_link_executable (info) && !info->nointerp) |
252b5132 | 283 | { |
14b2f831 AM |
284 | s = bfd_make_section_anyway_with_flags (abfd, ".interp", |
285 | flags | SEC_READONLY); | |
3496cb2a | 286 | if (s == NULL) |
45d6a902 AM |
287 | return FALSE; |
288 | } | |
bb0deeff | 289 | |
45d6a902 AM |
290 | /* Create sections to hold version informations. These are removed |
291 | if they are not needed. */ | |
14b2f831 AM |
292 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_d", |
293 | flags | SEC_READONLY); | |
45d6a902 | 294 | if (s == NULL |
fd361982 | 295 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
45d6a902 AM |
296 | return FALSE; |
297 | ||
14b2f831 AM |
298 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version", |
299 | flags | SEC_READONLY); | |
45d6a902 | 300 | if (s == NULL |
fd361982 | 301 | || !bfd_set_section_alignment (s, 1)) |
45d6a902 AM |
302 | return FALSE; |
303 | ||
14b2f831 AM |
304 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_r", |
305 | flags | SEC_READONLY); | |
45d6a902 | 306 | if (s == NULL |
fd361982 | 307 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
45d6a902 AM |
308 | return FALSE; |
309 | ||
14b2f831 AM |
310 | s = bfd_make_section_anyway_with_flags (abfd, ".dynsym", |
311 | flags | SEC_READONLY); | |
45d6a902 | 312 | if (s == NULL |
fd361982 | 313 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
45d6a902 | 314 | return FALSE; |
cae1fbbb | 315 | elf_hash_table (info)->dynsym = s; |
45d6a902 | 316 | |
14b2f831 AM |
317 | s = bfd_make_section_anyway_with_flags (abfd, ".dynstr", |
318 | flags | SEC_READONLY); | |
3496cb2a | 319 | if (s == NULL) |
45d6a902 AM |
320 | return FALSE; |
321 | ||
14b2f831 | 322 | s = bfd_make_section_anyway_with_flags (abfd, ".dynamic", flags); |
45d6a902 | 323 | if (s == NULL |
fd361982 | 324 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
45d6a902 AM |
325 | return FALSE; |
326 | ||
327 | /* The special symbol _DYNAMIC is always set to the start of the | |
77cfaee6 AM |
328 | .dynamic section. We could set _DYNAMIC in a linker script, but we |
329 | only want to define it if we are, in fact, creating a .dynamic | |
330 | section. We don't want to define it if there is no .dynamic | |
331 | section, since on some ELF platforms the start up code examines it | |
332 | to decide how to initialize the process. */ | |
9637f6ef L |
333 | h = _bfd_elf_define_linkage_sym (abfd, info, s, "_DYNAMIC"); |
334 | elf_hash_table (info)->hdynamic = h; | |
335 | if (h == NULL) | |
45d6a902 AM |
336 | return FALSE; |
337 | ||
fdc90cb4 JJ |
338 | if (info->emit_hash) |
339 | { | |
14b2f831 AM |
340 | s = bfd_make_section_anyway_with_flags (abfd, ".hash", |
341 | flags | SEC_READONLY); | |
fdc90cb4 | 342 | if (s == NULL |
fd361982 | 343 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
fdc90cb4 JJ |
344 | return FALSE; |
345 | elf_section_data (s)->this_hdr.sh_entsize = bed->s->sizeof_hash_entry; | |
346 | } | |
347 | ||
f16a9783 | 348 | if (info->emit_gnu_hash && bed->record_xhash_symbol == NULL) |
fdc90cb4 | 349 | { |
14b2f831 AM |
350 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.hash", |
351 | flags | SEC_READONLY); | |
fdc90cb4 | 352 | if (s == NULL |
fd361982 | 353 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
fdc90cb4 JJ |
354 | return FALSE; |
355 | /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section: | |
356 | 4 32-bit words followed by variable count of 64-bit words, then | |
357 | variable count of 32-bit words. */ | |
358 | if (bed->s->arch_size == 64) | |
359 | elf_section_data (s)->this_hdr.sh_entsize = 0; | |
360 | else | |
361 | elf_section_data (s)->this_hdr.sh_entsize = 4; | |
362 | } | |
45d6a902 AM |
363 | |
364 | /* Let the backend create the rest of the sections. This lets the | |
365 | backend set the right flags. The backend will normally create | |
366 | the .got and .plt sections. */ | |
894891db NC |
367 | if (bed->elf_backend_create_dynamic_sections == NULL |
368 | || ! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) | |
45d6a902 AM |
369 | return FALSE; |
370 | ||
371 | elf_hash_table (info)->dynamic_sections_created = TRUE; | |
372 | ||
373 | return TRUE; | |
374 | } | |
375 | ||
376 | /* Create dynamic sections when linking against a dynamic object. */ | |
377 | ||
378 | bfd_boolean | |
268b6b39 | 379 | _bfd_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
45d6a902 AM |
380 | { |
381 | flagword flags, pltflags; | |
7325306f | 382 | struct elf_link_hash_entry *h; |
45d6a902 | 383 | asection *s; |
9c5bfbb7 | 384 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 385 | struct elf_link_hash_table *htab = elf_hash_table (info); |
45d6a902 | 386 | |
252b5132 RH |
387 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
388 | .rel[a].bss sections. */ | |
e5a52504 | 389 | flags = bed->dynamic_sec_flags; |
252b5132 RH |
390 | |
391 | pltflags = flags; | |
252b5132 | 392 | if (bed->plt_not_loaded) |
6df4d94c MM |
393 | /* We do not clear SEC_ALLOC here because we still want the OS to |
394 | allocate space for the section; it's just that there's nothing | |
395 | to read in from the object file. */ | |
5d1634d7 | 396 | pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS); |
6df4d94c MM |
397 | else |
398 | pltflags |= SEC_ALLOC | SEC_CODE | SEC_LOAD; | |
252b5132 RH |
399 | if (bed->plt_readonly) |
400 | pltflags |= SEC_READONLY; | |
401 | ||
14b2f831 | 402 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); |
252b5132 | 403 | if (s == NULL |
fd361982 | 404 | || !bfd_set_section_alignment (s, bed->plt_alignment)) |
b34976b6 | 405 | return FALSE; |
6de2ae4a | 406 | htab->splt = s; |
252b5132 | 407 | |
d98685ac AM |
408 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
409 | .plt section. */ | |
7325306f RS |
410 | if (bed->want_plt_sym) |
411 | { | |
412 | h = _bfd_elf_define_linkage_sym (abfd, info, s, | |
413 | "_PROCEDURE_LINKAGE_TABLE_"); | |
414 | elf_hash_table (info)->hplt = h; | |
415 | if (h == NULL) | |
416 | return FALSE; | |
417 | } | |
252b5132 | 418 | |
14b2f831 AM |
419 | s = bfd_make_section_anyway_with_flags (abfd, |
420 | (bed->rela_plts_and_copies_p | |
421 | ? ".rela.plt" : ".rel.plt"), | |
422 | flags | SEC_READONLY); | |
252b5132 | 423 | if (s == NULL |
fd361982 | 424 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
b34976b6 | 425 | return FALSE; |
6de2ae4a | 426 | htab->srelplt = s; |
252b5132 RH |
427 | |
428 | if (! _bfd_elf_create_got_section (abfd, info)) | |
b34976b6 | 429 | return FALSE; |
252b5132 | 430 | |
3018b441 RH |
431 | if (bed->want_dynbss) |
432 | { | |
433 | /* The .dynbss section is a place to put symbols which are defined | |
434 | by dynamic objects, are referenced by regular objects, and are | |
435 | not functions. We must allocate space for them in the process | |
436 | image and use a R_*_COPY reloc to tell the dynamic linker to | |
437 | initialize them at run time. The linker script puts the .dynbss | |
438 | section into the .bss section of the final image. */ | |
14b2f831 | 439 | s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", |
afbf7e8e | 440 | SEC_ALLOC | SEC_LINKER_CREATED); |
3496cb2a | 441 | if (s == NULL) |
b34976b6 | 442 | return FALSE; |
9d19e4fd | 443 | htab->sdynbss = s; |
252b5132 | 444 | |
5474d94f AM |
445 | if (bed->want_dynrelro) |
446 | { | |
447 | /* Similarly, but for symbols that were originally in read-only | |
afbf7e8e AM |
448 | sections. This section doesn't really need to have contents, |
449 | but make it like other .data.rel.ro sections. */ | |
5474d94f | 450 | s = bfd_make_section_anyway_with_flags (abfd, ".data.rel.ro", |
afbf7e8e | 451 | flags); |
5474d94f AM |
452 | if (s == NULL) |
453 | return FALSE; | |
454 | htab->sdynrelro = s; | |
455 | } | |
456 | ||
3018b441 | 457 | /* The .rel[a].bss section holds copy relocs. This section is not |
77cfaee6 AM |
458 | normally needed. We need to create it here, though, so that the |
459 | linker will map it to an output section. We can't just create it | |
460 | only if we need it, because we will not know whether we need it | |
461 | until we have seen all the input files, and the first time the | |
462 | main linker code calls BFD after examining all the input files | |
463 | (size_dynamic_sections) the input sections have already been | |
464 | mapped to the output sections. If the section turns out not to | |
465 | be needed, we can discard it later. We will never need this | |
466 | section when generating a shared object, since they do not use | |
467 | copy relocs. */ | |
9d19e4fd | 468 | if (bfd_link_executable (info)) |
3018b441 | 469 | { |
14b2f831 AM |
470 | s = bfd_make_section_anyway_with_flags (abfd, |
471 | (bed->rela_plts_and_copies_p | |
472 | ? ".rela.bss" : ".rel.bss"), | |
473 | flags | SEC_READONLY); | |
3018b441 | 474 | if (s == NULL |
fd361982 | 475 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
b34976b6 | 476 | return FALSE; |
9d19e4fd | 477 | htab->srelbss = s; |
5474d94f AM |
478 | |
479 | if (bed->want_dynrelro) | |
480 | { | |
481 | s = (bfd_make_section_anyway_with_flags | |
482 | (abfd, (bed->rela_plts_and_copies_p | |
483 | ? ".rela.data.rel.ro" : ".rel.data.rel.ro"), | |
484 | flags | SEC_READONLY)); | |
485 | if (s == NULL | |
fd361982 | 486 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
5474d94f AM |
487 | return FALSE; |
488 | htab->sreldynrelro = s; | |
489 | } | |
3018b441 | 490 | } |
252b5132 RH |
491 | } |
492 | ||
b34976b6 | 493 | return TRUE; |
252b5132 RH |
494 | } |
495 | \f | |
252b5132 RH |
496 | /* Record a new dynamic symbol. We record the dynamic symbols as we |
497 | read the input files, since we need to have a list of all of them | |
498 | before we can determine the final sizes of the output sections. | |
499 | Note that we may actually call this function even though we are not | |
500 | going to output any dynamic symbols; in some cases we know that a | |
501 | symbol should be in the dynamic symbol table, but only if there is | |
502 | one. */ | |
503 | ||
b34976b6 | 504 | bfd_boolean |
c152c796 AM |
505 | bfd_elf_link_record_dynamic_symbol (struct bfd_link_info *info, |
506 | struct elf_link_hash_entry *h) | |
252b5132 RH |
507 | { |
508 | if (h->dynindx == -1) | |
509 | { | |
2b0f7ef9 | 510 | struct elf_strtab_hash *dynstr; |
68b6ddd0 | 511 | char *p; |
252b5132 | 512 | const char *name; |
ef53be89 | 513 | size_t indx; |
252b5132 | 514 | |
a896df97 AM |
515 | if (h->root.type == bfd_link_hash_defined |
516 | || h->root.type == bfd_link_hash_defweak) | |
517 | { | |
518 | /* An IR symbol should not be made dynamic. */ | |
519 | if (h->root.u.def.section != NULL | |
520 | && h->root.u.def.section->owner != NULL | |
521 | && (h->root.u.def.section->owner->flags & BFD_PLUGIN) != 0) | |
522 | return TRUE; | |
523 | } | |
524 | ||
7a13edea NC |
525 | /* XXX: The ABI draft says the linker must turn hidden and |
526 | internal symbols into STB_LOCAL symbols when producing the | |
527 | DSO. However, if ld.so honors st_other in the dynamic table, | |
528 | this would not be necessary. */ | |
529 | switch (ELF_ST_VISIBILITY (h->other)) | |
530 | { | |
531 | case STV_INTERNAL: | |
532 | case STV_HIDDEN: | |
9d6eee78 L |
533 | if (h->root.type != bfd_link_hash_undefined |
534 | && h->root.type != bfd_link_hash_undefweak) | |
38048eb9 | 535 | { |
f5385ebf | 536 | h->forced_local = 1; |
67687978 PB |
537 | if (!elf_hash_table (info)->is_relocatable_executable) |
538 | return TRUE; | |
7a13edea | 539 | } |
0444bdd4 | 540 | |
7a13edea NC |
541 | default: |
542 | break; | |
543 | } | |
544 | ||
252b5132 RH |
545 | h->dynindx = elf_hash_table (info)->dynsymcount; |
546 | ++elf_hash_table (info)->dynsymcount; | |
547 | ||
548 | dynstr = elf_hash_table (info)->dynstr; | |
549 | if (dynstr == NULL) | |
550 | { | |
551 | /* Create a strtab to hold the dynamic symbol names. */ | |
2b0f7ef9 | 552 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); |
252b5132 | 553 | if (dynstr == NULL) |
b34976b6 | 554 | return FALSE; |
252b5132 RH |
555 | } |
556 | ||
557 | /* We don't put any version information in the dynamic string | |
aad5d350 | 558 | table. */ |
252b5132 RH |
559 | name = h->root.root.string; |
560 | p = strchr (name, ELF_VER_CHR); | |
68b6ddd0 AM |
561 | if (p != NULL) |
562 | /* We know that the p points into writable memory. In fact, | |
563 | there are only a few symbols that have read-only names, being | |
564 | those like _GLOBAL_OFFSET_TABLE_ that are created specially | |
565 | by the backends. Most symbols will have names pointing into | |
566 | an ELF string table read from a file, or to objalloc memory. */ | |
567 | *p = 0; | |
568 | ||
569 | indx = _bfd_elf_strtab_add (dynstr, name, p != NULL); | |
570 | ||
571 | if (p != NULL) | |
572 | *p = ELF_VER_CHR; | |
252b5132 | 573 | |
ef53be89 | 574 | if (indx == (size_t) -1) |
b34976b6 | 575 | return FALSE; |
252b5132 RH |
576 | h->dynstr_index = indx; |
577 | } | |
578 | ||
b34976b6 | 579 | return TRUE; |
252b5132 | 580 | } |
45d6a902 | 581 | \f |
55255dae L |
582 | /* Mark a symbol dynamic. */ |
583 | ||
28caa186 | 584 | static void |
55255dae | 585 | bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info *info, |
40b36307 L |
586 | struct elf_link_hash_entry *h, |
587 | Elf_Internal_Sym *sym) | |
55255dae | 588 | { |
40b36307 | 589 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
55255dae | 590 | |
40b36307 | 591 | /* It may be called more than once on the same H. */ |
0e1862bb | 592 | if(h->dynamic || bfd_link_relocatable (info)) |
55255dae L |
593 | return; |
594 | ||
40b36307 L |
595 | if ((info->dynamic_data |
596 | && (h->type == STT_OBJECT | |
b8871f35 | 597 | || h->type == STT_COMMON |
40b36307 | 598 | || (sym != NULL |
b8871f35 L |
599 | && (ELF_ST_TYPE (sym->st_info) == STT_OBJECT |
600 | || ELF_ST_TYPE (sym->st_info) == STT_COMMON)))) | |
a0c8462f | 601 | || (d != NULL |
73ec947d | 602 | && h->non_elf |
40b36307 | 603 | && (*d->match) (&d->head, NULL, h->root.root.string))) |
416c34d6 L |
604 | { |
605 | h->dynamic = 1; | |
606 | /* NB: If a symbol is made dynamic by --dynamic-list, it has | |
607 | non-IR reference. */ | |
608 | h->root.non_ir_ref_dynamic = 1; | |
609 | } | |
55255dae L |
610 | } |
611 | ||
45d6a902 AM |
612 | /* Record an assignment to a symbol made by a linker script. We need |
613 | this in case some dynamic object refers to this symbol. */ | |
614 | ||
615 | bfd_boolean | |
fe21a8fc L |
616 | bfd_elf_record_link_assignment (bfd *output_bfd, |
617 | struct bfd_link_info *info, | |
268b6b39 | 618 | const char *name, |
fe21a8fc L |
619 | bfd_boolean provide, |
620 | bfd_boolean hidden) | |
45d6a902 | 621 | { |
00cbee0a | 622 | struct elf_link_hash_entry *h, *hv; |
4ea42fb7 | 623 | struct elf_link_hash_table *htab; |
00cbee0a | 624 | const struct elf_backend_data *bed; |
45d6a902 | 625 | |
0eddce27 | 626 | if (!is_elf_hash_table (info->hash)) |
45d6a902 AM |
627 | return TRUE; |
628 | ||
4ea42fb7 AM |
629 | htab = elf_hash_table (info); |
630 | h = elf_link_hash_lookup (htab, name, !provide, TRUE, FALSE); | |
45d6a902 | 631 | if (h == NULL) |
4ea42fb7 | 632 | return provide; |
45d6a902 | 633 | |
8e2a4f11 AM |
634 | if (h->root.type == bfd_link_hash_warning) |
635 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
636 | ||
0f550b3d L |
637 | if (h->versioned == unknown) |
638 | { | |
639 | /* Set versioned if symbol version is unknown. */ | |
640 | char *version = strrchr (name, ELF_VER_CHR); | |
641 | if (version) | |
642 | { | |
643 | if (version > name && version[-1] != ELF_VER_CHR) | |
644 | h->versioned = versioned_hidden; | |
645 | else | |
646 | h->versioned = versioned; | |
647 | } | |
648 | } | |
649 | ||
73ec947d AM |
650 | /* Symbols defined in a linker script but not referenced anywhere |
651 | else will have non_elf set. */ | |
652 | if (h->non_elf) | |
653 | { | |
654 | bfd_elf_link_mark_dynamic_symbol (info, h, NULL); | |
655 | h->non_elf = 0; | |
656 | } | |
657 | ||
00cbee0a | 658 | switch (h->root.type) |
77cfaee6 | 659 | { |
00cbee0a L |
660 | case bfd_link_hash_defined: |
661 | case bfd_link_hash_defweak: | |
662 | case bfd_link_hash_common: | |
663 | break; | |
664 | case bfd_link_hash_undefweak: | |
665 | case bfd_link_hash_undefined: | |
666 | /* Since we're defining the symbol, don't let it seem to have not | |
667 | been defined. record_dynamic_symbol and size_dynamic_sections | |
668 | may depend on this. */ | |
4ea42fb7 | 669 | h->root.type = bfd_link_hash_new; |
77cfaee6 AM |
670 | if (h->root.u.undef.next != NULL || htab->root.undefs_tail == &h->root) |
671 | bfd_link_repair_undef_list (&htab->root); | |
00cbee0a L |
672 | break; |
673 | case bfd_link_hash_new: | |
00cbee0a L |
674 | break; |
675 | case bfd_link_hash_indirect: | |
676 | /* We had a versioned symbol in a dynamic library. We make the | |
a0c8462f | 677 | the versioned symbol point to this one. */ |
00cbee0a L |
678 | bed = get_elf_backend_data (output_bfd); |
679 | hv = h; | |
680 | while (hv->root.type == bfd_link_hash_indirect | |
681 | || hv->root.type == bfd_link_hash_warning) | |
682 | hv = (struct elf_link_hash_entry *) hv->root.u.i.link; | |
683 | /* We don't need to update h->root.u since linker will set them | |
684 | later. */ | |
685 | h->root.type = bfd_link_hash_undefined; | |
686 | hv->root.type = bfd_link_hash_indirect; | |
687 | hv->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
688 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hv); | |
689 | break; | |
8e2a4f11 AM |
690 | default: |
691 | BFD_FAIL (); | |
c2596ca5 | 692 | return FALSE; |
55255dae | 693 | } |
45d6a902 AM |
694 | |
695 | /* If this symbol is being provided by the linker script, and it is | |
696 | currently defined by a dynamic object, but not by a regular | |
697 | object, then mark it as undefined so that the generic linker will | |
698 | force the correct value. */ | |
699 | if (provide | |
f5385ebf AM |
700 | && h->def_dynamic |
701 | && !h->def_regular) | |
45d6a902 AM |
702 | h->root.type = bfd_link_hash_undefined; |
703 | ||
48e30f52 L |
704 | /* If this symbol is currently defined by a dynamic object, but not |
705 | by a regular object, then clear out any version information because | |
706 | the symbol will not be associated with the dynamic object any | |
707 | more. */ | |
708 | if (h->def_dynamic && !h->def_regular) | |
b531344c MR |
709 | h->verinfo.verdef = NULL; |
710 | ||
711 | /* Make sure this symbol is not garbage collected. */ | |
712 | h->mark = 1; | |
45d6a902 | 713 | |
f5385ebf | 714 | h->def_regular = 1; |
45d6a902 | 715 | |
eb8476a6 | 716 | if (hidden) |
fe21a8fc | 717 | { |
91d6fa6a | 718 | bed = get_elf_backend_data (output_bfd); |
b8297068 AM |
719 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
720 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
fe21a8fc L |
721 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
722 | } | |
723 | ||
6fa3860b PB |
724 | /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects |
725 | and executables. */ | |
0e1862bb | 726 | if (!bfd_link_relocatable (info) |
6fa3860b PB |
727 | && h->dynindx != -1 |
728 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
729 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) | |
730 | h->forced_local = 1; | |
731 | ||
f5385ebf AM |
732 | if ((h->def_dynamic |
733 | || h->ref_dynamic | |
6b3b0ab8 L |
734 | || bfd_link_dll (info) |
735 | || elf_hash_table (info)->is_relocatable_executable) | |
34a87bb0 | 736 | && !h->forced_local |
45d6a902 AM |
737 | && h->dynindx == -1) |
738 | { | |
c152c796 | 739 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
45d6a902 AM |
740 | return FALSE; |
741 | ||
742 | /* If this is a weak defined symbol, and we know a corresponding | |
743 | real symbol from the same dynamic object, make sure the real | |
744 | symbol is also made into a dynamic symbol. */ | |
60d67dc8 | 745 | if (h->is_weakalias) |
45d6a902 | 746 | { |
60d67dc8 AM |
747 | struct elf_link_hash_entry *def = weakdef (h); |
748 | ||
749 | if (def->dynindx == -1 | |
750 | && !bfd_elf_link_record_dynamic_symbol (info, def)) | |
45d6a902 AM |
751 | return FALSE; |
752 | } | |
753 | } | |
754 | ||
755 | return TRUE; | |
756 | } | |
42751cf3 | 757 | |
8c58d23b AM |
758 | /* Record a new local dynamic symbol. Returns 0 on failure, 1 on |
759 | success, and 2 on a failure caused by attempting to record a symbol | |
760 | in a discarded section, eg. a discarded link-once section symbol. */ | |
761 | ||
762 | int | |
c152c796 AM |
763 | bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info *info, |
764 | bfd *input_bfd, | |
765 | long input_indx) | |
8c58d23b | 766 | { |
986f0783 | 767 | size_t amt; |
8c58d23b AM |
768 | struct elf_link_local_dynamic_entry *entry; |
769 | struct elf_link_hash_table *eht; | |
770 | struct elf_strtab_hash *dynstr; | |
ef53be89 | 771 | size_t dynstr_index; |
8c58d23b AM |
772 | char *name; |
773 | Elf_External_Sym_Shndx eshndx; | |
774 | char esym[sizeof (Elf64_External_Sym)]; | |
775 | ||
0eddce27 | 776 | if (! is_elf_hash_table (info->hash)) |
8c58d23b AM |
777 | return 0; |
778 | ||
779 | /* See if the entry exists already. */ | |
780 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
781 | if (entry->input_bfd == input_bfd && entry->input_indx == input_indx) | |
782 | return 1; | |
783 | ||
784 | amt = sizeof (*entry); | |
a50b1753 | 785 | entry = (struct elf_link_local_dynamic_entry *) bfd_alloc (input_bfd, amt); |
8c58d23b AM |
786 | if (entry == NULL) |
787 | return 0; | |
788 | ||
789 | /* Go find the symbol, so that we can find it's name. */ | |
790 | if (!bfd_elf_get_elf_syms (input_bfd, &elf_tdata (input_bfd)->symtab_hdr, | |
268b6b39 | 791 | 1, input_indx, &entry->isym, esym, &eshndx)) |
8c58d23b AM |
792 | { |
793 | bfd_release (input_bfd, entry); | |
794 | return 0; | |
795 | } | |
796 | ||
797 | if (entry->isym.st_shndx != SHN_UNDEF | |
4fbb74a6 | 798 | && entry->isym.st_shndx < SHN_LORESERVE) |
8c58d23b AM |
799 | { |
800 | asection *s; | |
801 | ||
802 | s = bfd_section_from_elf_index (input_bfd, entry->isym.st_shndx); | |
803 | if (s == NULL || bfd_is_abs_section (s->output_section)) | |
804 | { | |
805 | /* We can still bfd_release here as nothing has done another | |
806 | bfd_alloc. We can't do this later in this function. */ | |
807 | bfd_release (input_bfd, entry); | |
808 | return 2; | |
809 | } | |
810 | } | |
811 | ||
812 | name = (bfd_elf_string_from_elf_section | |
813 | (input_bfd, elf_tdata (input_bfd)->symtab_hdr.sh_link, | |
814 | entry->isym.st_name)); | |
815 | ||
816 | dynstr = elf_hash_table (info)->dynstr; | |
817 | if (dynstr == NULL) | |
818 | { | |
819 | /* Create a strtab to hold the dynamic symbol names. */ | |
820 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); | |
821 | if (dynstr == NULL) | |
822 | return 0; | |
823 | } | |
824 | ||
b34976b6 | 825 | dynstr_index = _bfd_elf_strtab_add (dynstr, name, FALSE); |
ef53be89 | 826 | if (dynstr_index == (size_t) -1) |
8c58d23b AM |
827 | return 0; |
828 | entry->isym.st_name = dynstr_index; | |
829 | ||
830 | eht = elf_hash_table (info); | |
831 | ||
832 | entry->next = eht->dynlocal; | |
833 | eht->dynlocal = entry; | |
834 | entry->input_bfd = input_bfd; | |
835 | entry->input_indx = input_indx; | |
836 | eht->dynsymcount++; | |
837 | ||
838 | /* Whatever binding the symbol had before, it's now local. */ | |
839 | entry->isym.st_info | |
840 | = ELF_ST_INFO (STB_LOCAL, ELF_ST_TYPE (entry->isym.st_info)); | |
841 | ||
842 | /* The dynindx will be set at the end of size_dynamic_sections. */ | |
843 | ||
844 | return 1; | |
845 | } | |
846 | ||
30b30c21 | 847 | /* Return the dynindex of a local dynamic symbol. */ |
42751cf3 | 848 | |
30b30c21 | 849 | long |
268b6b39 AM |
850 | _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info *info, |
851 | bfd *input_bfd, | |
852 | long input_indx) | |
30b30c21 RH |
853 | { |
854 | struct elf_link_local_dynamic_entry *e; | |
855 | ||
856 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
857 | if (e->input_bfd == input_bfd && e->input_indx == input_indx) | |
858 | return e->dynindx; | |
859 | return -1; | |
860 | } | |
861 | ||
862 | /* This function is used to renumber the dynamic symbols, if some of | |
863 | them are removed because they are marked as local. This is called | |
864 | via elf_link_hash_traverse. */ | |
865 | ||
b34976b6 | 866 | static bfd_boolean |
268b6b39 AM |
867 | elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry *h, |
868 | void *data) | |
42751cf3 | 869 | { |
a50b1753 | 870 | size_t *count = (size_t *) data; |
30b30c21 | 871 | |
6fa3860b PB |
872 | if (h->forced_local) |
873 | return TRUE; | |
874 | ||
875 | if (h->dynindx != -1) | |
876 | h->dynindx = ++(*count); | |
877 | ||
878 | return TRUE; | |
879 | } | |
880 | ||
881 | ||
882 | /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with | |
883 | STB_LOCAL binding. */ | |
884 | ||
885 | static bfd_boolean | |
886 | elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry *h, | |
887 | void *data) | |
888 | { | |
a50b1753 | 889 | size_t *count = (size_t *) data; |
6fa3860b | 890 | |
6fa3860b PB |
891 | if (!h->forced_local) |
892 | return TRUE; | |
893 | ||
42751cf3 | 894 | if (h->dynindx != -1) |
30b30c21 RH |
895 | h->dynindx = ++(*count); |
896 | ||
b34976b6 | 897 | return TRUE; |
42751cf3 | 898 | } |
30b30c21 | 899 | |
aee6f5b4 AO |
900 | /* Return true if the dynamic symbol for a given section should be |
901 | omitted when creating a shared library. */ | |
902 | bfd_boolean | |
d00dd7dc AM |
903 | _bfd_elf_omit_section_dynsym_default (bfd *output_bfd ATTRIBUTE_UNUSED, |
904 | struct bfd_link_info *info, | |
905 | asection *p) | |
aee6f5b4 | 906 | { |
74541ad4 | 907 | struct elf_link_hash_table *htab; |
ca55926c | 908 | asection *ip; |
74541ad4 | 909 | |
aee6f5b4 AO |
910 | switch (elf_section_data (p)->this_hdr.sh_type) |
911 | { | |
912 | case SHT_PROGBITS: | |
913 | case SHT_NOBITS: | |
914 | /* If sh_type is yet undecided, assume it could be | |
915 | SHT_PROGBITS/SHT_NOBITS. */ | |
916 | case SHT_NULL: | |
74541ad4 | 917 | htab = elf_hash_table (info); |
74541ad4 AM |
918 | if (htab->text_index_section != NULL) |
919 | return p != htab->text_index_section && p != htab->data_index_section; | |
920 | ||
ca55926c | 921 | return (htab->dynobj != NULL |
3d4d4302 | 922 | && (ip = bfd_get_linker_section (htab->dynobj, p->name)) != NULL |
ca55926c | 923 | && ip->output_section == p); |
aee6f5b4 AO |
924 | |
925 | /* There shouldn't be section relative relocations | |
926 | against any other section. */ | |
927 | default: | |
928 | return TRUE; | |
929 | } | |
930 | } | |
931 | ||
d00dd7dc AM |
932 | bfd_boolean |
933 | _bfd_elf_omit_section_dynsym_all | |
934 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
935 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
936 | asection *p ATTRIBUTE_UNUSED) | |
937 | { | |
938 | return TRUE; | |
939 | } | |
940 | ||
062e2358 | 941 | /* Assign dynsym indices. In a shared library we generate a section |
6fa3860b PB |
942 | symbol for each output section, which come first. Next come symbols |
943 | which have been forced to local binding. Then all of the back-end | |
944 | allocated local dynamic syms, followed by the rest of the global | |
63f452a8 AM |
945 | symbols. If SECTION_SYM_COUNT is NULL, section dynindx is not set. |
946 | (This prevents the early call before elf_backend_init_index_section | |
947 | and strip_excluded_output_sections setting dynindx for sections | |
948 | that are stripped.) */ | |
30b30c21 | 949 | |
554220db AM |
950 | static unsigned long |
951 | _bfd_elf_link_renumber_dynsyms (bfd *output_bfd, | |
952 | struct bfd_link_info *info, | |
953 | unsigned long *section_sym_count) | |
30b30c21 RH |
954 | { |
955 | unsigned long dynsymcount = 0; | |
63f452a8 | 956 | bfd_boolean do_sec = section_sym_count != NULL; |
30b30c21 | 957 | |
0e1862bb L |
958 | if (bfd_link_pic (info) |
959 | || elf_hash_table (info)->is_relocatable_executable) | |
30b30c21 | 960 | { |
aee6f5b4 | 961 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
30b30c21 RH |
962 | asection *p; |
963 | for (p = output_bfd->sections; p ; p = p->next) | |
8c37241b | 964 | if ((p->flags & SEC_EXCLUDE) == 0 |
aee6f5b4 | 965 | && (p->flags & SEC_ALLOC) != 0 |
7f923b7f | 966 | && elf_hash_table (info)->dynamic_relocs |
aee6f5b4 | 967 | && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) |
63f452a8 AM |
968 | { |
969 | ++dynsymcount; | |
970 | if (do_sec) | |
971 | elf_section_data (p)->dynindx = dynsymcount; | |
972 | } | |
973 | else if (do_sec) | |
74541ad4 | 974 | elf_section_data (p)->dynindx = 0; |
30b30c21 | 975 | } |
63f452a8 AM |
976 | if (do_sec) |
977 | *section_sym_count = dynsymcount; | |
30b30c21 | 978 | |
6fa3860b PB |
979 | elf_link_hash_traverse (elf_hash_table (info), |
980 | elf_link_renumber_local_hash_table_dynsyms, | |
981 | &dynsymcount); | |
982 | ||
30b30c21 RH |
983 | if (elf_hash_table (info)->dynlocal) |
984 | { | |
985 | struct elf_link_local_dynamic_entry *p; | |
986 | for (p = elf_hash_table (info)->dynlocal; p ; p = p->next) | |
987 | p->dynindx = ++dynsymcount; | |
988 | } | |
90ac2420 | 989 | elf_hash_table (info)->local_dynsymcount = dynsymcount; |
30b30c21 RH |
990 | |
991 | elf_link_hash_traverse (elf_hash_table (info), | |
992 | elf_link_renumber_hash_table_dynsyms, | |
993 | &dynsymcount); | |
994 | ||
d5486c43 L |
995 | /* There is an unused NULL entry at the head of the table which we |
996 | must account for in our count even if the table is empty since it | |
997 | is intended for the mandatory DT_SYMTAB tag (.dynsym section) in | |
998 | .dynamic section. */ | |
999 | dynsymcount++; | |
30b30c21 | 1000 | |
ccabcbe5 AM |
1001 | elf_hash_table (info)->dynsymcount = dynsymcount; |
1002 | return dynsymcount; | |
30b30c21 | 1003 | } |
252b5132 | 1004 | |
54ac0771 L |
1005 | /* Merge st_other field. */ |
1006 | ||
1007 | static void | |
1008 | elf_merge_st_other (bfd *abfd, struct elf_link_hash_entry *h, | |
b8417128 | 1009 | const Elf_Internal_Sym *isym, asection *sec, |
cd3416da | 1010 | bfd_boolean definition, bfd_boolean dynamic) |
54ac0771 L |
1011 | { |
1012 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1013 | ||
1014 | /* If st_other has a processor-specific meaning, specific | |
cd3416da | 1015 | code might be needed here. */ |
54ac0771 L |
1016 | if (bed->elf_backend_merge_symbol_attribute) |
1017 | (*bed->elf_backend_merge_symbol_attribute) (h, isym, definition, | |
1018 | dynamic); | |
1019 | ||
cd3416da | 1020 | if (!dynamic) |
54ac0771 | 1021 | { |
cd3416da AM |
1022 | unsigned symvis = ELF_ST_VISIBILITY (isym->st_other); |
1023 | unsigned hvis = ELF_ST_VISIBILITY (h->other); | |
54ac0771 | 1024 | |
cd3416da AM |
1025 | /* Keep the most constraining visibility. Leave the remainder |
1026 | of the st_other field to elf_backend_merge_symbol_attribute. */ | |
1027 | if (symvis - 1 < hvis - 1) | |
1028 | h->other = symvis | (h->other & ~ELF_ST_VISIBILITY (-1)); | |
54ac0771 | 1029 | } |
b8417128 AM |
1030 | else if (definition |
1031 | && ELF_ST_VISIBILITY (isym->st_other) != STV_DEFAULT | |
1032 | && (sec->flags & SEC_READONLY) == 0) | |
6cabe1ea | 1033 | h->protected_def = 1; |
54ac0771 L |
1034 | } |
1035 | ||
4f3fedcf AM |
1036 | /* This function is called when we want to merge a new symbol with an |
1037 | existing symbol. It handles the various cases which arise when we | |
1038 | find a definition in a dynamic object, or when there is already a | |
1039 | definition in a dynamic object. The new symbol is described by | |
1040 | NAME, SYM, PSEC, and PVALUE. We set SYM_HASH to the hash table | |
1041 | entry. We set POLDBFD to the old symbol's BFD. We set POLD_WEAK | |
1042 | if the old symbol was weak. We set POLD_ALIGNMENT to the alignment | |
1043 | of an old common symbol. We set OVERRIDE if the old symbol is | |
1044 | overriding a new definition. We set TYPE_CHANGE_OK if it is OK for | |
1045 | the type to change. We set SIZE_CHANGE_OK if it is OK for the size | |
1046 | to change. By OK to change, we mean that we shouldn't warn if the | |
1047 | type or size does change. */ | |
45d6a902 | 1048 | |
8a56bd02 | 1049 | static bfd_boolean |
268b6b39 AM |
1050 | _bfd_elf_merge_symbol (bfd *abfd, |
1051 | struct bfd_link_info *info, | |
1052 | const char *name, | |
1053 | Elf_Internal_Sym *sym, | |
1054 | asection **psec, | |
1055 | bfd_vma *pvalue, | |
4f3fedcf AM |
1056 | struct elf_link_hash_entry **sym_hash, |
1057 | bfd **poldbfd, | |
37a9e49a | 1058 | bfd_boolean *pold_weak, |
af44c138 | 1059 | unsigned int *pold_alignment, |
268b6b39 | 1060 | bfd_boolean *skip, |
7ba11550 | 1061 | bfd **override, |
268b6b39 | 1062 | bfd_boolean *type_change_ok, |
6e33951e L |
1063 | bfd_boolean *size_change_ok, |
1064 | bfd_boolean *matched) | |
252b5132 | 1065 | { |
7479dfd4 | 1066 | asection *sec, *oldsec; |
45d6a902 | 1067 | struct elf_link_hash_entry *h; |
90c984fc | 1068 | struct elf_link_hash_entry *hi; |
45d6a902 AM |
1069 | struct elf_link_hash_entry *flip; |
1070 | int bind; | |
1071 | bfd *oldbfd; | |
1072 | bfd_boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon; | |
0a36a439 | 1073 | bfd_boolean newweak, oldweak, newfunc, oldfunc; |
a4d8e49b | 1074 | const struct elf_backend_data *bed; |
6e33951e | 1075 | char *new_version; |
93f4de39 | 1076 | bfd_boolean default_sym = *matched; |
45d6a902 AM |
1077 | |
1078 | *skip = FALSE; | |
7ba11550 | 1079 | *override = NULL; |
45d6a902 AM |
1080 | |
1081 | sec = *psec; | |
1082 | bind = ELF_ST_BIND (sym->st_info); | |
1083 | ||
1084 | if (! bfd_is_und_section (sec)) | |
1085 | h = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, FALSE, FALSE); | |
1086 | else | |
1087 | h = ((struct elf_link_hash_entry *) | |
1088 | bfd_wrapped_link_hash_lookup (abfd, info, name, TRUE, FALSE, FALSE)); | |
1089 | if (h == NULL) | |
1090 | return FALSE; | |
1091 | *sym_hash = h; | |
252b5132 | 1092 | |
88ba32a0 L |
1093 | bed = get_elf_backend_data (abfd); |
1094 | ||
6e33951e | 1095 | /* NEW_VERSION is the symbol version of the new symbol. */ |
422f1182 | 1096 | if (h->versioned != unversioned) |
6e33951e | 1097 | { |
422f1182 L |
1098 | /* Symbol version is unknown or versioned. */ |
1099 | new_version = strrchr (name, ELF_VER_CHR); | |
1100 | if (new_version) | |
1101 | { | |
1102 | if (h->versioned == unknown) | |
1103 | { | |
1104 | if (new_version > name && new_version[-1] != ELF_VER_CHR) | |
1105 | h->versioned = versioned_hidden; | |
1106 | else | |
1107 | h->versioned = versioned; | |
1108 | } | |
1109 | new_version += 1; | |
1110 | if (new_version[0] == '\0') | |
1111 | new_version = NULL; | |
1112 | } | |
1113 | else | |
1114 | h->versioned = unversioned; | |
6e33951e | 1115 | } |
422f1182 L |
1116 | else |
1117 | new_version = NULL; | |
6e33951e | 1118 | |
90c984fc L |
1119 | /* For merging, we only care about real symbols. But we need to make |
1120 | sure that indirect symbol dynamic flags are updated. */ | |
1121 | hi = h; | |
45d6a902 AM |
1122 | while (h->root.type == bfd_link_hash_indirect |
1123 | || h->root.type == bfd_link_hash_warning) | |
1124 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1125 | ||
6e33951e L |
1126 | if (!*matched) |
1127 | { | |
1128 | if (hi == h || h->root.type == bfd_link_hash_new) | |
1129 | *matched = TRUE; | |
1130 | else | |
1131 | { | |
ae7683d2 | 1132 | /* OLD_HIDDEN is true if the existing symbol is only visible |
6e33951e | 1133 | to the symbol with the same symbol version. NEW_HIDDEN is |
ae7683d2 | 1134 | true if the new symbol is only visible to the symbol with |
6e33951e | 1135 | the same symbol version. */ |
422f1182 L |
1136 | bfd_boolean old_hidden = h->versioned == versioned_hidden; |
1137 | bfd_boolean new_hidden = hi->versioned == versioned_hidden; | |
6e33951e L |
1138 | if (!old_hidden && !new_hidden) |
1139 | /* The new symbol matches the existing symbol if both | |
1140 | aren't hidden. */ | |
1141 | *matched = TRUE; | |
1142 | else | |
1143 | { | |
1144 | /* OLD_VERSION is the symbol version of the existing | |
1145 | symbol. */ | |
422f1182 L |
1146 | char *old_version; |
1147 | ||
1148 | if (h->versioned >= versioned) | |
1149 | old_version = strrchr (h->root.root.string, | |
1150 | ELF_VER_CHR) + 1; | |
1151 | else | |
1152 | old_version = NULL; | |
6e33951e L |
1153 | |
1154 | /* The new symbol matches the existing symbol if they | |
1155 | have the same symbol version. */ | |
1156 | *matched = (old_version == new_version | |
1157 | || (old_version != NULL | |
1158 | && new_version != NULL | |
1159 | && strcmp (old_version, new_version) == 0)); | |
1160 | } | |
1161 | } | |
1162 | } | |
1163 | ||
934bce08 AM |
1164 | /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the |
1165 | existing symbol. */ | |
1166 | ||
1167 | oldbfd = NULL; | |
1168 | oldsec = NULL; | |
1169 | switch (h->root.type) | |
1170 | { | |
1171 | default: | |
1172 | break; | |
1173 | ||
1174 | case bfd_link_hash_undefined: | |
1175 | case bfd_link_hash_undefweak: | |
1176 | oldbfd = h->root.u.undef.abfd; | |
1177 | break; | |
1178 | ||
1179 | case bfd_link_hash_defined: | |
1180 | case bfd_link_hash_defweak: | |
1181 | oldbfd = h->root.u.def.section->owner; | |
1182 | oldsec = h->root.u.def.section; | |
1183 | break; | |
1184 | ||
1185 | case bfd_link_hash_common: | |
1186 | oldbfd = h->root.u.c.p->section->owner; | |
1187 | oldsec = h->root.u.c.p->section; | |
1188 | if (pold_alignment) | |
1189 | *pold_alignment = h->root.u.c.p->alignment_power; | |
1190 | break; | |
1191 | } | |
1192 | if (poldbfd && *poldbfd == NULL) | |
1193 | *poldbfd = oldbfd; | |
1194 | ||
1195 | /* Differentiate strong and weak symbols. */ | |
1196 | newweak = bind == STB_WEAK; | |
1197 | oldweak = (h->root.type == bfd_link_hash_defweak | |
1198 | || h->root.type == bfd_link_hash_undefweak); | |
1199 | if (pold_weak) | |
1200 | *pold_weak = oldweak; | |
1201 | ||
40b36307 | 1202 | /* We have to check it for every instance since the first few may be |
ee659f1f | 1203 | references and not all compilers emit symbol type for undefined |
40b36307 L |
1204 | symbols. */ |
1205 | bfd_elf_link_mark_dynamic_symbol (info, h, sym); | |
1206 | ||
ee659f1f AM |
1207 | /* NEWDYN and OLDDYN indicate whether the new or old symbol, |
1208 | respectively, is from a dynamic object. */ | |
1209 | ||
1210 | newdyn = (abfd->flags & DYNAMIC) != 0; | |
1211 | ||
1212 | /* ref_dynamic_nonweak and dynamic_def flags track actual undefined | |
1213 | syms and defined syms in dynamic libraries respectively. | |
1214 | ref_dynamic on the other hand can be set for a symbol defined in | |
1215 | a dynamic library, and def_dynamic may not be set; When the | |
1216 | definition in a dynamic lib is overridden by a definition in the | |
1217 | executable use of the symbol in the dynamic lib becomes a | |
1218 | reference to the executable symbol. */ | |
1219 | if (newdyn) | |
1220 | { | |
1221 | if (bfd_is_und_section (sec)) | |
1222 | { | |
1223 | if (bind != STB_WEAK) | |
1224 | { | |
1225 | h->ref_dynamic_nonweak = 1; | |
1226 | hi->ref_dynamic_nonweak = 1; | |
1227 | } | |
1228 | } | |
1229 | else | |
1230 | { | |
6e33951e L |
1231 | /* Update the existing symbol only if they match. */ |
1232 | if (*matched) | |
1233 | h->dynamic_def = 1; | |
ee659f1f AM |
1234 | hi->dynamic_def = 1; |
1235 | } | |
1236 | } | |
1237 | ||
45d6a902 AM |
1238 | /* If we just created the symbol, mark it as being an ELF symbol. |
1239 | Other than that, there is nothing to do--there is no merge issue | |
1240 | with a newly defined symbol--so we just return. */ | |
1241 | ||
1242 | if (h->root.type == bfd_link_hash_new) | |
252b5132 | 1243 | { |
f5385ebf | 1244 | h->non_elf = 0; |
45d6a902 AM |
1245 | return TRUE; |
1246 | } | |
252b5132 | 1247 | |
45d6a902 AM |
1248 | /* In cases involving weak versioned symbols, we may wind up trying |
1249 | to merge a symbol with itself. Catch that here, to avoid the | |
1250 | confusion that results if we try to override a symbol with | |
1251 | itself. The additional tests catch cases like | |
1252 | _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a | |
1253 | dynamic object, which we do want to handle here. */ | |
1254 | if (abfd == oldbfd | |
895fa45f | 1255 | && (newweak || oldweak) |
45d6a902 | 1256 | && ((abfd->flags & DYNAMIC) == 0 |
f5385ebf | 1257 | || !h->def_regular)) |
45d6a902 AM |
1258 | return TRUE; |
1259 | ||
707bba77 | 1260 | olddyn = FALSE; |
45d6a902 AM |
1261 | if (oldbfd != NULL) |
1262 | olddyn = (oldbfd->flags & DYNAMIC) != 0; | |
707bba77 | 1263 | else if (oldsec != NULL) |
45d6a902 | 1264 | { |
707bba77 | 1265 | /* This handles the special SHN_MIPS_{TEXT,DATA} section |
45d6a902 | 1266 | indices used by MIPS ELF. */ |
707bba77 | 1267 | olddyn = (oldsec->symbol->flags & BSF_DYNAMIC) != 0; |
45d6a902 | 1268 | } |
252b5132 | 1269 | |
1a3b5c34 AM |
1270 | /* Handle a case where plugin_notice won't be called and thus won't |
1271 | set the non_ir_ref flags on the first pass over symbols. */ | |
1272 | if (oldbfd != NULL | |
1273 | && (oldbfd->flags & BFD_PLUGIN) != (abfd->flags & BFD_PLUGIN) | |
1274 | && newdyn != olddyn) | |
1275 | { | |
1276 | h->root.non_ir_ref_dynamic = TRUE; | |
1277 | hi->root.non_ir_ref_dynamic = TRUE; | |
1278 | } | |
1279 | ||
45d6a902 AM |
1280 | /* NEWDEF and OLDDEF indicate whether the new or old symbol, |
1281 | respectively, appear to be a definition rather than reference. */ | |
1282 | ||
707bba77 | 1283 | newdef = !bfd_is_und_section (sec) && !bfd_is_com_section (sec); |
45d6a902 | 1284 | |
707bba77 AM |
1285 | olddef = (h->root.type != bfd_link_hash_undefined |
1286 | && h->root.type != bfd_link_hash_undefweak | |
202ac193 | 1287 | && h->root.type != bfd_link_hash_common); |
45d6a902 | 1288 | |
0a36a439 L |
1289 | /* NEWFUNC and OLDFUNC indicate whether the new or old symbol, |
1290 | respectively, appear to be a function. */ | |
1291 | ||
1292 | newfunc = (ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1293 | && bed->is_function_type (ELF_ST_TYPE (sym->st_info))); | |
1294 | ||
1295 | oldfunc = (h->type != STT_NOTYPE | |
1296 | && bed->is_function_type (h->type)); | |
1297 | ||
c5d37467 | 1298 | if (!(newfunc && oldfunc) |
5b677558 AM |
1299 | && ELF_ST_TYPE (sym->st_info) != h->type |
1300 | && ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1301 | && h->type != STT_NOTYPE | |
c5d37467 AM |
1302 | && (newdef || bfd_is_com_section (sec)) |
1303 | && (olddef || h->root.type == bfd_link_hash_common)) | |
580a2b6e | 1304 | { |
c5d37467 AM |
1305 | /* If creating a default indirect symbol ("foo" or "foo@") from |
1306 | a dynamic versioned definition ("foo@@") skip doing so if | |
1307 | there is an existing regular definition with a different | |
1308 | type. We don't want, for example, a "time" variable in the | |
1309 | executable overriding a "time" function in a shared library. */ | |
1310 | if (newdyn | |
1311 | && !olddyn) | |
1312 | { | |
1313 | *skip = TRUE; | |
1314 | return TRUE; | |
1315 | } | |
1316 | ||
1317 | /* When adding a symbol from a regular object file after we have | |
1318 | created indirect symbols, undo the indirection and any | |
1319 | dynamic state. */ | |
1320 | if (hi != h | |
1321 | && !newdyn | |
1322 | && olddyn) | |
1323 | { | |
1324 | h = hi; | |
1325 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1326 | h->forced_local = 0; | |
1327 | h->ref_dynamic = 0; | |
1328 | h->def_dynamic = 0; | |
1329 | h->dynamic_def = 0; | |
1330 | if (h->root.u.undef.next || info->hash->undefs_tail == &h->root) | |
1331 | { | |
1332 | h->root.type = bfd_link_hash_undefined; | |
1333 | h->root.u.undef.abfd = abfd; | |
1334 | } | |
1335 | else | |
1336 | { | |
1337 | h->root.type = bfd_link_hash_new; | |
1338 | h->root.u.undef.abfd = NULL; | |
1339 | } | |
1340 | return TRUE; | |
1341 | } | |
580a2b6e L |
1342 | } |
1343 | ||
4c34aff8 AM |
1344 | /* Check TLS symbols. We don't check undefined symbols introduced |
1345 | by "ld -u" which have no type (and oldbfd NULL), and we don't | |
1346 | check symbols from plugins because they also have no type. */ | |
1347 | if (oldbfd != NULL | |
1348 | && (oldbfd->flags & BFD_PLUGIN) == 0 | |
1349 | && (abfd->flags & BFD_PLUGIN) == 0 | |
1350 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1351 | && (ELF_ST_TYPE (sym->st_info) == STT_TLS || h->type == STT_TLS)) | |
7479dfd4 L |
1352 | { |
1353 | bfd *ntbfd, *tbfd; | |
1354 | bfd_boolean ntdef, tdef; | |
1355 | asection *ntsec, *tsec; | |
1356 | ||
1357 | if (h->type == STT_TLS) | |
1358 | { | |
3b36f7e6 | 1359 | ntbfd = abfd; |
7479dfd4 L |
1360 | ntsec = sec; |
1361 | ntdef = newdef; | |
1362 | tbfd = oldbfd; | |
1363 | tsec = oldsec; | |
1364 | tdef = olddef; | |
1365 | } | |
1366 | else | |
1367 | { | |
1368 | ntbfd = oldbfd; | |
1369 | ntsec = oldsec; | |
1370 | ntdef = olddef; | |
1371 | tbfd = abfd; | |
1372 | tsec = sec; | |
1373 | tdef = newdef; | |
1374 | } | |
1375 | ||
1376 | if (tdef && ntdef) | |
4eca0228 | 1377 | _bfd_error_handler |
695344c0 | 1378 | /* xgettext:c-format */ |
871b3ab2 AM |
1379 | (_("%s: TLS definition in %pB section %pA " |
1380 | "mismatches non-TLS definition in %pB section %pA"), | |
c08bb8dd | 1381 | h->root.root.string, tbfd, tsec, ntbfd, ntsec); |
7479dfd4 | 1382 | else if (!tdef && !ntdef) |
4eca0228 | 1383 | _bfd_error_handler |
695344c0 | 1384 | /* xgettext:c-format */ |
871b3ab2 AM |
1385 | (_("%s: TLS reference in %pB " |
1386 | "mismatches non-TLS reference in %pB"), | |
c08bb8dd | 1387 | h->root.root.string, tbfd, ntbfd); |
7479dfd4 | 1388 | else if (tdef) |
4eca0228 | 1389 | _bfd_error_handler |
695344c0 | 1390 | /* xgettext:c-format */ |
871b3ab2 AM |
1391 | (_("%s: TLS definition in %pB section %pA " |
1392 | "mismatches non-TLS reference in %pB"), | |
c08bb8dd | 1393 | h->root.root.string, tbfd, tsec, ntbfd); |
7479dfd4 | 1394 | else |
4eca0228 | 1395 | _bfd_error_handler |
695344c0 | 1396 | /* xgettext:c-format */ |
871b3ab2 AM |
1397 | (_("%s: TLS reference in %pB " |
1398 | "mismatches non-TLS definition in %pB section %pA"), | |
c08bb8dd | 1399 | h->root.root.string, tbfd, ntbfd, ntsec); |
7479dfd4 L |
1400 | |
1401 | bfd_set_error (bfd_error_bad_value); | |
1402 | return FALSE; | |
1403 | } | |
1404 | ||
45d6a902 AM |
1405 | /* If the old symbol has non-default visibility, we ignore the new |
1406 | definition from a dynamic object. */ | |
1407 | if (newdyn | |
9c7a29a3 | 1408 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 AM |
1409 | && !bfd_is_und_section (sec)) |
1410 | { | |
1411 | *skip = TRUE; | |
1412 | /* Make sure this symbol is dynamic. */ | |
f5385ebf | 1413 | h->ref_dynamic = 1; |
90c984fc | 1414 | hi->ref_dynamic = 1; |
45d6a902 AM |
1415 | /* A protected symbol has external availability. Make sure it is |
1416 | recorded as dynamic. | |
1417 | ||
1418 | FIXME: Should we check type and size for protected symbol? */ | |
1419 | if (ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
c152c796 | 1420 | return bfd_elf_link_record_dynamic_symbol (info, h); |
45d6a902 AM |
1421 | else |
1422 | return TRUE; | |
1423 | } | |
1424 | else if (!newdyn | |
9c7a29a3 | 1425 | && ELF_ST_VISIBILITY (sym->st_other) != STV_DEFAULT |
f5385ebf | 1426 | && h->def_dynamic) |
45d6a902 AM |
1427 | { |
1428 | /* If the new symbol with non-default visibility comes from a | |
1429 | relocatable file and the old definition comes from a dynamic | |
1430 | object, we remove the old definition. */ | |
6c9b78e6 | 1431 | if (hi->root.type == bfd_link_hash_indirect) |
d2dee3b2 L |
1432 | { |
1433 | /* Handle the case where the old dynamic definition is | |
1434 | default versioned. We need to copy the symbol info from | |
1435 | the symbol with default version to the normal one if it | |
1436 | was referenced before. */ | |
1437 | if (h->ref_regular) | |
1438 | { | |
6c9b78e6 | 1439 | hi->root.type = h->root.type; |
d2dee3b2 | 1440 | h->root.type = bfd_link_hash_indirect; |
6c9b78e6 | 1441 | (*bed->elf_backend_copy_indirect_symbol) (info, hi, h); |
aed81c4e | 1442 | |
6c9b78e6 | 1443 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; |
aed81c4e | 1444 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
d2dee3b2 | 1445 | { |
aed81c4e MR |
1446 | /* If the new symbol is hidden or internal, completely undo |
1447 | any dynamic link state. */ | |
1448 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1449 | h->forced_local = 0; | |
1450 | h->ref_dynamic = 0; | |
d2dee3b2 L |
1451 | } |
1452 | else | |
aed81c4e MR |
1453 | h->ref_dynamic = 1; |
1454 | ||
1455 | h->def_dynamic = 0; | |
aed81c4e MR |
1456 | /* FIXME: Should we check type and size for protected symbol? */ |
1457 | h->size = 0; | |
1458 | h->type = 0; | |
1459 | ||
6c9b78e6 | 1460 | h = hi; |
d2dee3b2 L |
1461 | } |
1462 | else | |
6c9b78e6 | 1463 | h = hi; |
d2dee3b2 | 1464 | } |
1de1a317 | 1465 | |
f5eda473 AM |
1466 | /* If the old symbol was undefined before, then it will still be |
1467 | on the undefs list. If the new symbol is undefined or | |
1468 | common, we can't make it bfd_link_hash_new here, because new | |
1469 | undefined or common symbols will be added to the undefs list | |
1470 | by _bfd_generic_link_add_one_symbol. Symbols may not be | |
1471 | added twice to the undefs list. Also, if the new symbol is | |
1472 | undefweak then we don't want to lose the strong undef. */ | |
1473 | if (h->root.u.undef.next || info->hash->undefs_tail == &h->root) | |
1de1a317 | 1474 | { |
1de1a317 | 1475 | h->root.type = bfd_link_hash_undefined; |
1de1a317 L |
1476 | h->root.u.undef.abfd = abfd; |
1477 | } | |
1478 | else | |
1479 | { | |
1480 | h->root.type = bfd_link_hash_new; | |
1481 | h->root.u.undef.abfd = NULL; | |
1482 | } | |
1483 | ||
f5eda473 | 1484 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
252b5132 | 1485 | { |
f5eda473 AM |
1486 | /* If the new symbol is hidden or internal, completely undo |
1487 | any dynamic link state. */ | |
1488 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1489 | h->forced_local = 0; | |
1490 | h->ref_dynamic = 0; | |
45d6a902 | 1491 | } |
f5eda473 AM |
1492 | else |
1493 | h->ref_dynamic = 1; | |
1494 | h->def_dynamic = 0; | |
45d6a902 AM |
1495 | /* FIXME: Should we check type and size for protected symbol? */ |
1496 | h->size = 0; | |
1497 | h->type = 0; | |
1498 | return TRUE; | |
1499 | } | |
14a793b2 | 1500 | |
15b43f48 AM |
1501 | /* If a new weak symbol definition comes from a regular file and the |
1502 | old symbol comes from a dynamic library, we treat the new one as | |
1503 | strong. Similarly, an old weak symbol definition from a regular | |
1504 | file is treated as strong when the new symbol comes from a dynamic | |
1505 | library. Further, an old weak symbol from a dynamic library is | |
1506 | treated as strong if the new symbol is from a dynamic library. | |
1507 | This reflects the way glibc's ld.so works. | |
1508 | ||
165f707a AM |
1509 | Also allow a weak symbol to override a linker script symbol |
1510 | defined by an early pass over the script. This is done so the | |
1511 | linker knows the symbol is defined in an object file, for the | |
1512 | DEFINED script function. | |
1513 | ||
15b43f48 AM |
1514 | Do this before setting *type_change_ok or *size_change_ok so that |
1515 | we warn properly when dynamic library symbols are overridden. */ | |
1516 | ||
165f707a | 1517 | if (newdef && !newdyn && (olddyn || h->root.ldscript_def)) |
0f8a2703 | 1518 | newweak = FALSE; |
15b43f48 | 1519 | if (olddef && newdyn) |
0f8a2703 AM |
1520 | oldweak = FALSE; |
1521 | ||
d334575b | 1522 | /* Allow changes between different types of function symbol. */ |
0a36a439 | 1523 | if (newfunc && oldfunc) |
fcb93ecf PB |
1524 | *type_change_ok = TRUE; |
1525 | ||
79349b09 AM |
1526 | /* It's OK to change the type if either the existing symbol or the |
1527 | new symbol is weak. A type change is also OK if the old symbol | |
1528 | is undefined and the new symbol is defined. */ | |
252b5132 | 1529 | |
79349b09 AM |
1530 | if (oldweak |
1531 | || newweak | |
1532 | || (newdef | |
1533 | && h->root.type == bfd_link_hash_undefined)) | |
1534 | *type_change_ok = TRUE; | |
1535 | ||
1536 | /* It's OK to change the size if either the existing symbol or the | |
1537 | new symbol is weak, or if the old symbol is undefined. */ | |
1538 | ||
1539 | if (*type_change_ok | |
1540 | || h->root.type == bfd_link_hash_undefined) | |
1541 | *size_change_ok = TRUE; | |
45d6a902 | 1542 | |
45d6a902 AM |
1543 | /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old |
1544 | symbol, respectively, appears to be a common symbol in a dynamic | |
1545 | object. If a symbol appears in an uninitialized section, and is | |
1546 | not weak, and is not a function, then it may be a common symbol | |
1547 | which was resolved when the dynamic object was created. We want | |
1548 | to treat such symbols specially, because they raise special | |
1549 | considerations when setting the symbol size: if the symbol | |
1550 | appears as a common symbol in a regular object, and the size in | |
1551 | the regular object is larger, we must make sure that we use the | |
1552 | larger size. This problematic case can always be avoided in C, | |
1553 | but it must be handled correctly when using Fortran shared | |
1554 | libraries. | |
1555 | ||
1556 | Note that if NEWDYNCOMMON is set, NEWDEF will be set, and | |
1557 | likewise for OLDDYNCOMMON and OLDDEF. | |
1558 | ||
1559 | Note that this test is just a heuristic, and that it is quite | |
1560 | possible to have an uninitialized symbol in a shared object which | |
1561 | is really a definition, rather than a common symbol. This could | |
1562 | lead to some minor confusion when the symbol really is a common | |
1563 | symbol in some regular object. However, I think it will be | |
1564 | harmless. */ | |
1565 | ||
1566 | if (newdyn | |
1567 | && newdef | |
79349b09 | 1568 | && !newweak |
45d6a902 AM |
1569 | && (sec->flags & SEC_ALLOC) != 0 |
1570 | && (sec->flags & SEC_LOAD) == 0 | |
1571 | && sym->st_size > 0 | |
0a36a439 | 1572 | && !newfunc) |
45d6a902 AM |
1573 | newdyncommon = TRUE; |
1574 | else | |
1575 | newdyncommon = FALSE; | |
1576 | ||
1577 | if (olddyn | |
1578 | && olddef | |
1579 | && h->root.type == bfd_link_hash_defined | |
f5385ebf | 1580 | && h->def_dynamic |
45d6a902 AM |
1581 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 |
1582 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
1583 | && h->size > 0 | |
0a36a439 | 1584 | && !oldfunc) |
45d6a902 AM |
1585 | olddyncommon = TRUE; |
1586 | else | |
1587 | olddyncommon = FALSE; | |
1588 | ||
a4d8e49b L |
1589 | /* We now know everything about the old and new symbols. We ask the |
1590 | backend to check if we can merge them. */ | |
5d13b3b3 AM |
1591 | if (bed->merge_symbol != NULL) |
1592 | { | |
1593 | if (!bed->merge_symbol (h, sym, psec, newdef, olddef, oldbfd, oldsec)) | |
1594 | return FALSE; | |
1595 | sec = *psec; | |
1596 | } | |
a4d8e49b | 1597 | |
a83ef4d1 L |
1598 | /* There are multiple definitions of a normal symbol. Skip the |
1599 | default symbol as well as definition from an IR object. */ | |
93f4de39 | 1600 | if (olddef && !olddyn && !oldweak && newdef && !newdyn && !newweak |
a83ef4d1 L |
1601 | && !default_sym && h->def_regular |
1602 | && !(oldbfd != NULL | |
1603 | && (oldbfd->flags & BFD_PLUGIN) != 0 | |
1604 | && (abfd->flags & BFD_PLUGIN) == 0)) | |
93f4de39 RL |
1605 | { |
1606 | /* Handle a multiple definition. */ | |
1607 | (*info->callbacks->multiple_definition) (info, &h->root, | |
1608 | abfd, sec, *pvalue); | |
1609 | *skip = TRUE; | |
1610 | return TRUE; | |
1611 | } | |
1612 | ||
45d6a902 AM |
1613 | /* If both the old and the new symbols look like common symbols in a |
1614 | dynamic object, set the size of the symbol to the larger of the | |
1615 | two. */ | |
1616 | ||
1617 | if (olddyncommon | |
1618 | && newdyncommon | |
1619 | && sym->st_size != h->size) | |
1620 | { | |
1621 | /* Since we think we have two common symbols, issue a multiple | |
1622 | common warning if desired. Note that we only warn if the | |
1623 | size is different. If the size is the same, we simply let | |
1624 | the old symbol override the new one as normally happens with | |
1625 | symbols defined in dynamic objects. */ | |
1626 | ||
1a72702b AM |
1627 | (*info->callbacks->multiple_common) (info, &h->root, abfd, |
1628 | bfd_link_hash_common, sym->st_size); | |
45d6a902 AM |
1629 | if (sym->st_size > h->size) |
1630 | h->size = sym->st_size; | |
252b5132 | 1631 | |
45d6a902 | 1632 | *size_change_ok = TRUE; |
252b5132 RH |
1633 | } |
1634 | ||
45d6a902 AM |
1635 | /* If we are looking at a dynamic object, and we have found a |
1636 | definition, we need to see if the symbol was already defined by | |
1637 | some other object. If so, we want to use the existing | |
1638 | definition, and we do not want to report a multiple symbol | |
1639 | definition error; we do this by clobbering *PSEC to be | |
1640 | bfd_und_section_ptr. | |
1641 | ||
1642 | We treat a common symbol as a definition if the symbol in the | |
1643 | shared library is a function, since common symbols always | |
1644 | represent variables; this can cause confusion in principle, but | |
1645 | any such confusion would seem to indicate an erroneous program or | |
1646 | shared library. We also permit a common symbol in a regular | |
8170f769 | 1647 | object to override a weak symbol in a shared object. */ |
45d6a902 AM |
1648 | |
1649 | if (newdyn | |
1650 | && newdef | |
77cfaee6 | 1651 | && (olddef |
45d6a902 | 1652 | || (h->root.type == bfd_link_hash_common |
8170f769 | 1653 | && (newweak || newfunc)))) |
45d6a902 | 1654 | { |
7ba11550 | 1655 | *override = abfd; |
45d6a902 AM |
1656 | newdef = FALSE; |
1657 | newdyncommon = FALSE; | |
252b5132 | 1658 | |
45d6a902 AM |
1659 | *psec = sec = bfd_und_section_ptr; |
1660 | *size_change_ok = TRUE; | |
252b5132 | 1661 | |
45d6a902 AM |
1662 | /* If we get here when the old symbol is a common symbol, then |
1663 | we are explicitly letting it override a weak symbol or | |
1664 | function in a dynamic object, and we don't want to warn about | |
1665 | a type change. If the old symbol is a defined symbol, a type | |
1666 | change warning may still be appropriate. */ | |
252b5132 | 1667 | |
45d6a902 AM |
1668 | if (h->root.type == bfd_link_hash_common) |
1669 | *type_change_ok = TRUE; | |
1670 | } | |
1671 | ||
1672 | /* Handle the special case of an old common symbol merging with a | |
1673 | new symbol which looks like a common symbol in a shared object. | |
1674 | We change *PSEC and *PVALUE to make the new symbol look like a | |
91134c82 L |
1675 | common symbol, and let _bfd_generic_link_add_one_symbol do the |
1676 | right thing. */ | |
45d6a902 AM |
1677 | |
1678 | if (newdyncommon | |
1679 | && h->root.type == bfd_link_hash_common) | |
1680 | { | |
7ba11550 | 1681 | *override = oldbfd; |
45d6a902 AM |
1682 | newdef = FALSE; |
1683 | newdyncommon = FALSE; | |
1684 | *pvalue = sym->st_size; | |
a4d8e49b | 1685 | *psec = sec = bed->common_section (oldsec); |
45d6a902 AM |
1686 | *size_change_ok = TRUE; |
1687 | } | |
1688 | ||
c5e2cead | 1689 | /* Skip weak definitions of symbols that are already defined. */ |
f41d945b | 1690 | if (newdef && olddef && newweak) |
54ac0771 | 1691 | { |
35ed3f94 | 1692 | /* Don't skip new non-IR weak syms. */ |
3a5dbfb2 AM |
1693 | if (!(oldbfd != NULL |
1694 | && (oldbfd->flags & BFD_PLUGIN) != 0 | |
35ed3f94 | 1695 | && (abfd->flags & BFD_PLUGIN) == 0)) |
57fa7b8c AM |
1696 | { |
1697 | newdef = FALSE; | |
1698 | *skip = TRUE; | |
1699 | } | |
54ac0771 L |
1700 | |
1701 | /* Merge st_other. If the symbol already has a dynamic index, | |
1702 | but visibility says it should not be visible, turn it into a | |
1703 | local symbol. */ | |
b8417128 | 1704 | elf_merge_st_other (abfd, h, sym, sec, newdef, newdyn); |
54ac0771 L |
1705 | if (h->dynindx != -1) |
1706 | switch (ELF_ST_VISIBILITY (h->other)) | |
1707 | { | |
1708 | case STV_INTERNAL: | |
1709 | case STV_HIDDEN: | |
1710 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1711 | break; | |
1712 | } | |
1713 | } | |
c5e2cead | 1714 | |
45d6a902 AM |
1715 | /* If the old symbol is from a dynamic object, and the new symbol is |
1716 | a definition which is not from a dynamic object, then the new | |
1717 | symbol overrides the old symbol. Symbols from regular files | |
1718 | always take precedence over symbols from dynamic objects, even if | |
1719 | they are defined after the dynamic object in the link. | |
1720 | ||
1721 | As above, we again permit a common symbol in a regular object to | |
1722 | override a definition in a shared object if the shared object | |
0f8a2703 | 1723 | symbol is a function or is weak. */ |
45d6a902 AM |
1724 | |
1725 | flip = NULL; | |
77cfaee6 | 1726 | if (!newdyn |
45d6a902 AM |
1727 | && (newdef |
1728 | || (bfd_is_com_section (sec) | |
0a36a439 | 1729 | && (oldweak || oldfunc))) |
45d6a902 AM |
1730 | && olddyn |
1731 | && olddef | |
f5385ebf | 1732 | && h->def_dynamic) |
45d6a902 AM |
1733 | { |
1734 | /* Change the hash table entry to undefined, and let | |
1735 | _bfd_generic_link_add_one_symbol do the right thing with the | |
1736 | new definition. */ | |
1737 | ||
1738 | h->root.type = bfd_link_hash_undefined; | |
1739 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1740 | *size_change_ok = TRUE; | |
1741 | ||
1742 | olddef = FALSE; | |
1743 | olddyncommon = FALSE; | |
1744 | ||
1745 | /* We again permit a type change when a common symbol may be | |
1746 | overriding a function. */ | |
1747 | ||
1748 | if (bfd_is_com_section (sec)) | |
0a36a439 L |
1749 | { |
1750 | if (oldfunc) | |
1751 | { | |
1752 | /* If a common symbol overrides a function, make sure | |
1753 | that it isn't defined dynamically nor has type | |
1754 | function. */ | |
1755 | h->def_dynamic = 0; | |
1756 | h->type = STT_NOTYPE; | |
1757 | } | |
1758 | *type_change_ok = TRUE; | |
1759 | } | |
45d6a902 | 1760 | |
6c9b78e6 AM |
1761 | if (hi->root.type == bfd_link_hash_indirect) |
1762 | flip = hi; | |
45d6a902 AM |
1763 | else |
1764 | /* This union may have been set to be non-NULL when this symbol | |
1765 | was seen in a dynamic object. We must force the union to be | |
1766 | NULL, so that it is correct for a regular symbol. */ | |
1767 | h->verinfo.vertree = NULL; | |
1768 | } | |
1769 | ||
1770 | /* Handle the special case of a new common symbol merging with an | |
1771 | old symbol that looks like it might be a common symbol defined in | |
1772 | a shared object. Note that we have already handled the case in | |
1773 | which a new common symbol should simply override the definition | |
1774 | in the shared library. */ | |
1775 | ||
1776 | if (! newdyn | |
1777 | && bfd_is_com_section (sec) | |
1778 | && olddyncommon) | |
1779 | { | |
1780 | /* It would be best if we could set the hash table entry to a | |
1781 | common symbol, but we don't know what to use for the section | |
1782 | or the alignment. */ | |
1a72702b AM |
1783 | (*info->callbacks->multiple_common) (info, &h->root, abfd, |
1784 | bfd_link_hash_common, sym->st_size); | |
45d6a902 | 1785 | |
4cc11e76 | 1786 | /* If the presumed common symbol in the dynamic object is |
45d6a902 AM |
1787 | larger, pretend that the new symbol has its size. */ |
1788 | ||
1789 | if (h->size > *pvalue) | |
1790 | *pvalue = h->size; | |
1791 | ||
af44c138 L |
1792 | /* We need to remember the alignment required by the symbol |
1793 | in the dynamic object. */ | |
1794 | BFD_ASSERT (pold_alignment); | |
1795 | *pold_alignment = h->root.u.def.section->alignment_power; | |
45d6a902 AM |
1796 | |
1797 | olddef = FALSE; | |
1798 | olddyncommon = FALSE; | |
1799 | ||
1800 | h->root.type = bfd_link_hash_undefined; | |
1801 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1802 | ||
1803 | *size_change_ok = TRUE; | |
1804 | *type_change_ok = TRUE; | |
1805 | ||
6c9b78e6 AM |
1806 | if (hi->root.type == bfd_link_hash_indirect) |
1807 | flip = hi; | |
45d6a902 AM |
1808 | else |
1809 | h->verinfo.vertree = NULL; | |
1810 | } | |
1811 | ||
1812 | if (flip != NULL) | |
1813 | { | |
1814 | /* Handle the case where we had a versioned symbol in a dynamic | |
1815 | library and now find a definition in a normal object. In this | |
1816 | case, we make the versioned symbol point to the normal one. */ | |
45d6a902 | 1817 | flip->root.type = h->root.type; |
00cbee0a | 1818 | flip->root.u.undef.abfd = h->root.u.undef.abfd; |
45d6a902 AM |
1819 | h->root.type = bfd_link_hash_indirect; |
1820 | h->root.u.i.link = (struct bfd_link_hash_entry *) flip; | |
fcfa13d2 | 1821 | (*bed->elf_backend_copy_indirect_symbol) (info, flip, h); |
f5385ebf | 1822 | if (h->def_dynamic) |
45d6a902 | 1823 | { |
f5385ebf AM |
1824 | h->def_dynamic = 0; |
1825 | flip->ref_dynamic = 1; | |
45d6a902 AM |
1826 | } |
1827 | } | |
1828 | ||
45d6a902 AM |
1829 | return TRUE; |
1830 | } | |
1831 | ||
1832 | /* This function is called to create an indirect symbol from the | |
1833 | default for the symbol with the default version if needed. The | |
4f3fedcf | 1834 | symbol is described by H, NAME, SYM, SEC, and VALUE. We |
0f8a2703 | 1835 | set DYNSYM if the new indirect symbol is dynamic. */ |
45d6a902 | 1836 | |
28caa186 | 1837 | static bfd_boolean |
268b6b39 AM |
1838 | _bfd_elf_add_default_symbol (bfd *abfd, |
1839 | struct bfd_link_info *info, | |
1840 | struct elf_link_hash_entry *h, | |
1841 | const char *name, | |
1842 | Elf_Internal_Sym *sym, | |
4f3fedcf AM |
1843 | asection *sec, |
1844 | bfd_vma value, | |
1845 | bfd **poldbfd, | |
e3c9d234 | 1846 | bfd_boolean *dynsym) |
45d6a902 AM |
1847 | { |
1848 | bfd_boolean type_change_ok; | |
1849 | bfd_boolean size_change_ok; | |
1850 | bfd_boolean skip; | |
1851 | char *shortname; | |
1852 | struct elf_link_hash_entry *hi; | |
1853 | struct bfd_link_hash_entry *bh; | |
9c5bfbb7 | 1854 | const struct elf_backend_data *bed; |
45d6a902 AM |
1855 | bfd_boolean collect; |
1856 | bfd_boolean dynamic; | |
7ba11550 | 1857 | bfd *override; |
45d6a902 AM |
1858 | char *p; |
1859 | size_t len, shortlen; | |
ffd65175 | 1860 | asection *tmp_sec; |
6e33951e | 1861 | bfd_boolean matched; |
45d6a902 | 1862 | |
422f1182 L |
1863 | if (h->versioned == unversioned || h->versioned == versioned_hidden) |
1864 | return TRUE; | |
1865 | ||
45d6a902 AM |
1866 | /* If this symbol has a version, and it is the default version, we |
1867 | create an indirect symbol from the default name to the fully | |
1868 | decorated name. This will cause external references which do not | |
1869 | specify a version to be bound to this version of the symbol. */ | |
1870 | p = strchr (name, ELF_VER_CHR); | |
422f1182 L |
1871 | if (h->versioned == unknown) |
1872 | { | |
1873 | if (p == NULL) | |
1874 | { | |
1875 | h->versioned = unversioned; | |
1876 | return TRUE; | |
1877 | } | |
1878 | else | |
1879 | { | |
1880 | if (p[1] != ELF_VER_CHR) | |
1881 | { | |
1882 | h->versioned = versioned_hidden; | |
1883 | return TRUE; | |
1884 | } | |
1885 | else | |
1886 | h->versioned = versioned; | |
1887 | } | |
1888 | } | |
4373f8af L |
1889 | else |
1890 | { | |
1891 | /* PR ld/19073: We may see an unversioned definition after the | |
1892 | default version. */ | |
1893 | if (p == NULL) | |
1894 | return TRUE; | |
1895 | } | |
45d6a902 | 1896 | |
45d6a902 AM |
1897 | bed = get_elf_backend_data (abfd); |
1898 | collect = bed->collect; | |
1899 | dynamic = (abfd->flags & DYNAMIC) != 0; | |
1900 | ||
1901 | shortlen = p - name; | |
a50b1753 | 1902 | shortname = (char *) bfd_hash_allocate (&info->hash->table, shortlen + 1); |
45d6a902 AM |
1903 | if (shortname == NULL) |
1904 | return FALSE; | |
1905 | memcpy (shortname, name, shortlen); | |
1906 | shortname[shortlen] = '\0'; | |
1907 | ||
1908 | /* We are going to create a new symbol. Merge it with any existing | |
1909 | symbol with this name. For the purposes of the merge, act as | |
1910 | though we were defining the symbol we just defined, although we | |
1911 | actually going to define an indirect symbol. */ | |
1912 | type_change_ok = FALSE; | |
1913 | size_change_ok = FALSE; | |
6e33951e | 1914 | matched = TRUE; |
ffd65175 AM |
1915 | tmp_sec = sec; |
1916 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
4f3fedcf | 1917 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 1918 | &type_change_ok, &size_change_ok, &matched)) |
45d6a902 AM |
1919 | return FALSE; |
1920 | ||
1921 | if (skip) | |
1922 | goto nondefault; | |
1923 | ||
5fa370e4 | 1924 | if (hi->def_regular || ELF_COMMON_DEF_P (hi)) |
5b677558 AM |
1925 | { |
1926 | /* If the undecorated symbol will have a version added by a | |
1927 | script different to H, then don't indirect to/from the | |
1928 | undecorated symbol. This isn't ideal because we may not yet | |
1929 | have seen symbol versions, if given by a script on the | |
1930 | command line rather than via --version-script. */ | |
1931 | if (hi->verinfo.vertree == NULL && info->version_info != NULL) | |
1932 | { | |
1933 | bfd_boolean hide; | |
1934 | ||
1935 | hi->verinfo.vertree | |
1936 | = bfd_find_version_for_sym (info->version_info, | |
1937 | hi->root.root.string, &hide); | |
1938 | if (hi->verinfo.vertree != NULL && hide) | |
1939 | { | |
1940 | (*bed->elf_backend_hide_symbol) (info, hi, TRUE); | |
1941 | goto nondefault; | |
1942 | } | |
1943 | } | |
1944 | if (hi->verinfo.vertree != NULL | |
1945 | && strcmp (p + 1 + (p[1] == '@'), hi->verinfo.vertree->name) != 0) | |
1946 | goto nondefault; | |
1947 | } | |
1948 | ||
45d6a902 AM |
1949 | if (! override) |
1950 | { | |
c6e8a9a8 | 1951 | /* Add the default symbol if not performing a relocatable link. */ |
0e1862bb | 1952 | if (! bfd_link_relocatable (info)) |
c6e8a9a8 L |
1953 | { |
1954 | bh = &hi->root; | |
fbcc8baf | 1955 | if (bh->type == bfd_link_hash_defined |
6cc71b82 | 1956 | && bh->u.def.section->owner != NULL |
fbcc8baf L |
1957 | && (bh->u.def.section->owner->flags & BFD_PLUGIN) != 0) |
1958 | { | |
1959 | /* Mark the previous definition from IR object as | |
1960 | undefined so that the generic linker will override | |
1961 | it. */ | |
1962 | bh->type = bfd_link_hash_undefined; | |
1963 | bh->u.undef.abfd = bh->u.def.section->owner; | |
1964 | } | |
c6e8a9a8 L |
1965 | if (! (_bfd_generic_link_add_one_symbol |
1966 | (info, abfd, shortname, BSF_INDIRECT, | |
1967 | bfd_ind_section_ptr, | |
1968 | 0, name, FALSE, collect, &bh))) | |
1969 | return FALSE; | |
1970 | hi = (struct elf_link_hash_entry *) bh; | |
1971 | } | |
45d6a902 AM |
1972 | } |
1973 | else | |
1974 | { | |
1975 | /* In this case the symbol named SHORTNAME is overriding the | |
1976 | indirect symbol we want to add. We were planning on making | |
1977 | SHORTNAME an indirect symbol referring to NAME. SHORTNAME | |
1978 | is the name without a version. NAME is the fully versioned | |
1979 | name, and it is the default version. | |
1980 | ||
1981 | Overriding means that we already saw a definition for the | |
1982 | symbol SHORTNAME in a regular object, and it is overriding | |
1983 | the symbol defined in the dynamic object. | |
1984 | ||
1985 | When this happens, we actually want to change NAME, the | |
1986 | symbol we just added, to refer to SHORTNAME. This will cause | |
1987 | references to NAME in the shared object to become references | |
1988 | to SHORTNAME in the regular object. This is what we expect | |
1989 | when we override a function in a shared object: that the | |
1990 | references in the shared object will be mapped to the | |
1991 | definition in the regular object. */ | |
1992 | ||
1993 | while (hi->root.type == bfd_link_hash_indirect | |
1994 | || hi->root.type == bfd_link_hash_warning) | |
1995 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1996 | ||
1997 | h->root.type = bfd_link_hash_indirect; | |
1998 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; | |
f5385ebf | 1999 | if (h->def_dynamic) |
45d6a902 | 2000 | { |
f5385ebf AM |
2001 | h->def_dynamic = 0; |
2002 | hi->ref_dynamic = 1; | |
2003 | if (hi->ref_regular | |
2004 | || hi->def_regular) | |
45d6a902 | 2005 | { |
c152c796 | 2006 | if (! bfd_elf_link_record_dynamic_symbol (info, hi)) |
45d6a902 AM |
2007 | return FALSE; |
2008 | } | |
2009 | } | |
2010 | ||
2011 | /* Now set HI to H, so that the following code will set the | |
2012 | other fields correctly. */ | |
2013 | hi = h; | |
2014 | } | |
2015 | ||
fab4a87f L |
2016 | /* Check if HI is a warning symbol. */ |
2017 | if (hi->root.type == bfd_link_hash_warning) | |
2018 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
2019 | ||
45d6a902 AM |
2020 | /* If there is a duplicate definition somewhere, then HI may not |
2021 | point to an indirect symbol. We will have reported an error to | |
2022 | the user in that case. */ | |
2023 | ||
2024 | if (hi->root.type == bfd_link_hash_indirect) | |
2025 | { | |
2026 | struct elf_link_hash_entry *ht; | |
2027 | ||
45d6a902 | 2028 | ht = (struct elf_link_hash_entry *) hi->root.u.i.link; |
fcfa13d2 | 2029 | (*bed->elf_backend_copy_indirect_symbol) (info, ht, hi); |
45d6a902 | 2030 | |
68c88cd4 AM |
2031 | /* A reference to the SHORTNAME symbol from a dynamic library |
2032 | will be satisfied by the versioned symbol at runtime. In | |
2033 | effect, we have a reference to the versioned symbol. */ | |
2034 | ht->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; | |
2035 | hi->dynamic_def |= ht->dynamic_def; | |
2036 | ||
45d6a902 AM |
2037 | /* See if the new flags lead us to realize that the symbol must |
2038 | be dynamic. */ | |
2039 | if (! *dynsym) | |
2040 | { | |
2041 | if (! dynamic) | |
2042 | { | |
0e1862bb | 2043 | if (! bfd_link_executable (info) |
90c984fc | 2044 | || hi->def_dynamic |
f5385ebf | 2045 | || hi->ref_dynamic) |
45d6a902 AM |
2046 | *dynsym = TRUE; |
2047 | } | |
2048 | else | |
2049 | { | |
f5385ebf | 2050 | if (hi->ref_regular) |
45d6a902 AM |
2051 | *dynsym = TRUE; |
2052 | } | |
2053 | } | |
2054 | } | |
2055 | ||
2056 | /* We also need to define an indirection from the nondefault version | |
2057 | of the symbol. */ | |
2058 | ||
dc1e8a47 | 2059 | nondefault: |
45d6a902 | 2060 | len = strlen (name); |
a50b1753 | 2061 | shortname = (char *) bfd_hash_allocate (&info->hash->table, len); |
45d6a902 AM |
2062 | if (shortname == NULL) |
2063 | return FALSE; | |
2064 | memcpy (shortname, name, shortlen); | |
2065 | memcpy (shortname + shortlen, p + 1, len - shortlen); | |
2066 | ||
2067 | /* Once again, merge with any existing symbol. */ | |
2068 | type_change_ok = FALSE; | |
2069 | size_change_ok = FALSE; | |
ffd65175 AM |
2070 | tmp_sec = sec; |
2071 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
115c6d5c | 2072 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 2073 | &type_change_ok, &size_change_ok, &matched)) |
45d6a902 AM |
2074 | return FALSE; |
2075 | ||
2076 | if (skip) | |
2077 | return TRUE; | |
2078 | ||
2079 | if (override) | |
2080 | { | |
2081 | /* Here SHORTNAME is a versioned name, so we don't expect to see | |
2082 | the type of override we do in the case above unless it is | |
4cc11e76 | 2083 | overridden by a versioned definition. */ |
45d6a902 AM |
2084 | if (hi->root.type != bfd_link_hash_defined |
2085 | && hi->root.type != bfd_link_hash_defweak) | |
4eca0228 | 2086 | _bfd_error_handler |
695344c0 | 2087 | /* xgettext:c-format */ |
871b3ab2 | 2088 | (_("%pB: unexpected redefinition of indirect versioned symbol `%s'"), |
d003868e | 2089 | abfd, shortname); |
45d6a902 AM |
2090 | } |
2091 | else | |
2092 | { | |
2093 | bh = &hi->root; | |
2094 | if (! (_bfd_generic_link_add_one_symbol | |
2095 | (info, abfd, shortname, BSF_INDIRECT, | |
268b6b39 | 2096 | bfd_ind_section_ptr, 0, name, FALSE, collect, &bh))) |
45d6a902 AM |
2097 | return FALSE; |
2098 | hi = (struct elf_link_hash_entry *) bh; | |
2099 | ||
2100 | /* If there is a duplicate definition somewhere, then HI may not | |
2101 | point to an indirect symbol. We will have reported an error | |
2102 | to the user in that case. */ | |
2103 | ||
2104 | if (hi->root.type == bfd_link_hash_indirect) | |
2105 | { | |
fcfa13d2 | 2106 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
68c88cd4 AM |
2107 | h->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; |
2108 | hi->dynamic_def |= h->dynamic_def; | |
45d6a902 AM |
2109 | |
2110 | /* See if the new flags lead us to realize that the symbol | |
2111 | must be dynamic. */ | |
2112 | if (! *dynsym) | |
2113 | { | |
2114 | if (! dynamic) | |
2115 | { | |
0e1862bb | 2116 | if (! bfd_link_executable (info) |
f5385ebf | 2117 | || hi->ref_dynamic) |
45d6a902 AM |
2118 | *dynsym = TRUE; |
2119 | } | |
2120 | else | |
2121 | { | |
f5385ebf | 2122 | if (hi->ref_regular) |
45d6a902 AM |
2123 | *dynsym = TRUE; |
2124 | } | |
2125 | } | |
2126 | } | |
2127 | } | |
2128 | ||
2129 | return TRUE; | |
2130 | } | |
2131 | \f | |
2132 | /* This routine is used to export all defined symbols into the dynamic | |
2133 | symbol table. It is called via elf_link_hash_traverse. */ | |
2134 | ||
28caa186 | 2135 | static bfd_boolean |
268b6b39 | 2136 | _bfd_elf_export_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2137 | { |
a50b1753 | 2138 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 AM |
2139 | |
2140 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
2141 | if (h->root.type == bfd_link_hash_indirect) | |
2142 | return TRUE; | |
2143 | ||
7686d77d AM |
2144 | /* Ignore this if we won't export it. */ |
2145 | if (!eif->info->export_dynamic && !h->dynamic) | |
2146 | return TRUE; | |
45d6a902 AM |
2147 | |
2148 | if (h->dynindx == -1 | |
fd91d419 L |
2149 | && (h->def_regular || h->ref_regular) |
2150 | && ! bfd_hide_sym_by_version (eif->info->version_info, | |
2151 | h->root.root.string)) | |
45d6a902 | 2152 | { |
fd91d419 | 2153 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 | 2154 | { |
fd91d419 L |
2155 | eif->failed = TRUE; |
2156 | return FALSE; | |
45d6a902 AM |
2157 | } |
2158 | } | |
2159 | ||
2160 | return TRUE; | |
2161 | } | |
2162 | \f | |
2163 | /* Look through the symbols which are defined in other shared | |
2164 | libraries and referenced here. Update the list of version | |
2165 | dependencies. This will be put into the .gnu.version_r section. | |
2166 | This function is called via elf_link_hash_traverse. */ | |
2167 | ||
28caa186 | 2168 | static bfd_boolean |
268b6b39 AM |
2169 | _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry *h, |
2170 | void *data) | |
45d6a902 | 2171 | { |
a50b1753 | 2172 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; |
45d6a902 AM |
2173 | Elf_Internal_Verneed *t; |
2174 | Elf_Internal_Vernaux *a; | |
986f0783 | 2175 | size_t amt; |
45d6a902 | 2176 | |
45d6a902 AM |
2177 | /* We only care about symbols defined in shared objects with version |
2178 | information. */ | |
f5385ebf AM |
2179 | if (!h->def_dynamic |
2180 | || h->def_regular | |
45d6a902 | 2181 | || h->dynindx == -1 |
7b20f099 AM |
2182 | || h->verinfo.verdef == NULL |
2183 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
2184 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
45d6a902 AM |
2185 | return TRUE; |
2186 | ||
2187 | /* See if we already know about this version. */ | |
28caa186 AM |
2188 | for (t = elf_tdata (rinfo->info->output_bfd)->verref; |
2189 | t != NULL; | |
2190 | t = t->vn_nextref) | |
45d6a902 AM |
2191 | { |
2192 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) | |
2193 | continue; | |
2194 | ||
2195 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2196 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
2197 | return TRUE; | |
2198 | ||
2199 | break; | |
2200 | } | |
2201 | ||
2202 | /* This is a new version. Add it to tree we are building. */ | |
2203 | ||
2204 | if (t == NULL) | |
2205 | { | |
2206 | amt = sizeof *t; | |
a50b1753 | 2207 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->info->output_bfd, amt); |
45d6a902 AM |
2208 | if (t == NULL) |
2209 | { | |
2210 | rinfo->failed = TRUE; | |
2211 | return FALSE; | |
2212 | } | |
2213 | ||
2214 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
28caa186 AM |
2215 | t->vn_nextref = elf_tdata (rinfo->info->output_bfd)->verref; |
2216 | elf_tdata (rinfo->info->output_bfd)->verref = t; | |
45d6a902 AM |
2217 | } |
2218 | ||
2219 | amt = sizeof *a; | |
a50b1753 | 2220 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->info->output_bfd, amt); |
14b1c01e AM |
2221 | if (a == NULL) |
2222 | { | |
2223 | rinfo->failed = TRUE; | |
2224 | return FALSE; | |
2225 | } | |
45d6a902 AM |
2226 | |
2227 | /* Note that we are copying a string pointer here, and testing it | |
2228 | above. If bfd_elf_string_from_elf_section is ever changed to | |
2229 | discard the string data when low in memory, this will have to be | |
2230 | fixed. */ | |
2231 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
2232 | ||
2233 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
2234 | a->vna_nextptr = t->vn_auxptr; | |
2235 | ||
2236 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
2237 | ++rinfo->vers; | |
2238 | ||
2239 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
2240 | ||
2241 | t->vn_auxptr = a; | |
2242 | ||
2243 | return TRUE; | |
2244 | } | |
2245 | ||
099bb8fb L |
2246 | /* Return TRUE and set *HIDE to TRUE if the versioned symbol is |
2247 | hidden. Set *T_P to NULL if there is no match. */ | |
2248 | ||
2249 | static bfd_boolean | |
2250 | _bfd_elf_link_hide_versioned_symbol (struct bfd_link_info *info, | |
2251 | struct elf_link_hash_entry *h, | |
2252 | const char *version_p, | |
2253 | struct bfd_elf_version_tree **t_p, | |
2254 | bfd_boolean *hide) | |
2255 | { | |
2256 | struct bfd_elf_version_tree *t; | |
2257 | ||
2258 | /* Look for the version. If we find it, it is no longer weak. */ | |
2259 | for (t = info->version_info; t != NULL; t = t->next) | |
2260 | { | |
2261 | if (strcmp (t->name, version_p) == 0) | |
2262 | { | |
2263 | size_t len; | |
2264 | char *alc; | |
2265 | struct bfd_elf_version_expr *d; | |
2266 | ||
2267 | len = version_p - h->root.root.string; | |
2268 | alc = (char *) bfd_malloc (len); | |
2269 | if (alc == NULL) | |
2270 | return FALSE; | |
2271 | memcpy (alc, h->root.root.string, len - 1); | |
2272 | alc[len - 1] = '\0'; | |
2273 | if (alc[len - 2] == ELF_VER_CHR) | |
2274 | alc[len - 2] = '\0'; | |
2275 | ||
2276 | h->verinfo.vertree = t; | |
2277 | t->used = TRUE; | |
2278 | d = NULL; | |
2279 | ||
2280 | if (t->globals.list != NULL) | |
2281 | d = (*t->match) (&t->globals, NULL, alc); | |
2282 | ||
2283 | /* See if there is anything to force this symbol to | |
2284 | local scope. */ | |
2285 | if (d == NULL && t->locals.list != NULL) | |
2286 | { | |
2287 | d = (*t->match) (&t->locals, NULL, alc); | |
2288 | if (d != NULL | |
2289 | && h->dynindx != -1 | |
2290 | && ! info->export_dynamic) | |
2291 | *hide = TRUE; | |
2292 | } | |
2293 | ||
2294 | free (alc); | |
2295 | break; | |
2296 | } | |
2297 | } | |
2298 | ||
2299 | *t_p = t; | |
2300 | ||
2301 | return TRUE; | |
2302 | } | |
2303 | ||
2304 | /* Return TRUE if the symbol H is hidden by version script. */ | |
2305 | ||
2306 | bfd_boolean | |
2307 | _bfd_elf_link_hide_sym_by_version (struct bfd_link_info *info, | |
2308 | struct elf_link_hash_entry *h) | |
2309 | { | |
2310 | const char *p; | |
2311 | bfd_boolean hide = FALSE; | |
2312 | const struct elf_backend_data *bed | |
2313 | = get_elf_backend_data (info->output_bfd); | |
2314 | ||
2315 | /* Version script only hides symbols defined in regular objects. */ | |
2316 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) | |
2317 | return TRUE; | |
2318 | ||
2319 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
2320 | if (p != NULL && h->verinfo.vertree == NULL) | |
2321 | { | |
2322 | struct bfd_elf_version_tree *t; | |
2323 | ||
2324 | ++p; | |
2325 | if (*p == ELF_VER_CHR) | |
2326 | ++p; | |
2327 | ||
2328 | if (*p != '\0' | |
2329 | && _bfd_elf_link_hide_versioned_symbol (info, h, p, &t, &hide) | |
2330 | && hide) | |
2331 | { | |
2332 | if (hide) | |
2333 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
2334 | return TRUE; | |
2335 | } | |
2336 | } | |
2337 | ||
2338 | /* If we don't have a version for this symbol, see if we can find | |
2339 | something. */ | |
2340 | if (h->verinfo.vertree == NULL && info->version_info != NULL) | |
2341 | { | |
2342 | h->verinfo.vertree | |
2343 | = bfd_find_version_for_sym (info->version_info, | |
2344 | h->root.root.string, &hide); | |
2345 | if (h->verinfo.vertree != NULL && hide) | |
2346 | { | |
2347 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
2348 | return TRUE; | |
2349 | } | |
2350 | } | |
2351 | ||
2352 | return FALSE; | |
2353 | } | |
2354 | ||
45d6a902 AM |
2355 | /* Figure out appropriate versions for all the symbols. We may not |
2356 | have the version number script until we have read all of the input | |
2357 | files, so until that point we don't know which symbols should be | |
2358 | local. This function is called via elf_link_hash_traverse. */ | |
2359 | ||
28caa186 | 2360 | static bfd_boolean |
268b6b39 | 2361 | _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2362 | { |
28caa186 | 2363 | struct elf_info_failed *sinfo; |
45d6a902 | 2364 | struct bfd_link_info *info; |
9c5bfbb7 | 2365 | const struct elf_backend_data *bed; |
45d6a902 AM |
2366 | struct elf_info_failed eif; |
2367 | char *p; | |
099bb8fb | 2368 | bfd_boolean hide; |
45d6a902 | 2369 | |
a50b1753 | 2370 | sinfo = (struct elf_info_failed *) data; |
45d6a902 AM |
2371 | info = sinfo->info; |
2372 | ||
45d6a902 AM |
2373 | /* Fix the symbol flags. */ |
2374 | eif.failed = FALSE; | |
2375 | eif.info = info; | |
2376 | if (! _bfd_elf_fix_symbol_flags (h, &eif)) | |
2377 | { | |
2378 | if (eif.failed) | |
2379 | sinfo->failed = TRUE; | |
2380 | return FALSE; | |
2381 | } | |
2382 | ||
0a640d71 L |
2383 | bed = get_elf_backend_data (info->output_bfd); |
2384 | ||
45d6a902 AM |
2385 | /* We only need version numbers for symbols defined in regular |
2386 | objects. */ | |
5fa370e4 | 2387 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
0a640d71 L |
2388 | { |
2389 | /* Hide symbols defined in discarded input sections. */ | |
2390 | if ((h->root.type == bfd_link_hash_defined | |
2391 | || h->root.type == bfd_link_hash_defweak) | |
2392 | && discarded_section (h->root.u.def.section)) | |
2393 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
2394 | return TRUE; | |
2395 | } | |
45d6a902 | 2396 | |
099bb8fb | 2397 | hide = FALSE; |
45d6a902 AM |
2398 | p = strchr (h->root.root.string, ELF_VER_CHR); |
2399 | if (p != NULL && h->verinfo.vertree == NULL) | |
2400 | { | |
2401 | struct bfd_elf_version_tree *t; | |
45d6a902 | 2402 | |
45d6a902 AM |
2403 | ++p; |
2404 | if (*p == ELF_VER_CHR) | |
6e33951e | 2405 | ++p; |
45d6a902 AM |
2406 | |
2407 | /* If there is no version string, we can just return out. */ | |
2408 | if (*p == '\0') | |
6e33951e | 2409 | return TRUE; |
45d6a902 | 2410 | |
099bb8fb | 2411 | if (!_bfd_elf_link_hide_versioned_symbol (info, h, p, &t, &hide)) |
45d6a902 | 2412 | { |
099bb8fb L |
2413 | sinfo->failed = TRUE; |
2414 | return FALSE; | |
45d6a902 AM |
2415 | } |
2416 | ||
099bb8fb L |
2417 | if (hide) |
2418 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
2419 | ||
45d6a902 AM |
2420 | /* If we are building an application, we need to create a |
2421 | version node for this version. */ | |
0e1862bb | 2422 | if (t == NULL && bfd_link_executable (info)) |
45d6a902 AM |
2423 | { |
2424 | struct bfd_elf_version_tree **pp; | |
2425 | int version_index; | |
2426 | ||
2427 | /* If we aren't going to export this symbol, we don't need | |
2428 | to worry about it. */ | |
2429 | if (h->dynindx == -1) | |
2430 | return TRUE; | |
2431 | ||
ef53be89 AM |
2432 | t = (struct bfd_elf_version_tree *) bfd_zalloc (info->output_bfd, |
2433 | sizeof *t); | |
45d6a902 AM |
2434 | if (t == NULL) |
2435 | { | |
2436 | sinfo->failed = TRUE; | |
2437 | return FALSE; | |
2438 | } | |
2439 | ||
45d6a902 | 2440 | t->name = p; |
45d6a902 AM |
2441 | t->name_indx = (unsigned int) -1; |
2442 | t->used = TRUE; | |
2443 | ||
2444 | version_index = 1; | |
2445 | /* Don't count anonymous version tag. */ | |
fd91d419 L |
2446 | if (sinfo->info->version_info != NULL |
2447 | && sinfo->info->version_info->vernum == 0) | |
45d6a902 | 2448 | version_index = 0; |
fd91d419 L |
2449 | for (pp = &sinfo->info->version_info; |
2450 | *pp != NULL; | |
2451 | pp = &(*pp)->next) | |
45d6a902 AM |
2452 | ++version_index; |
2453 | t->vernum = version_index; | |
2454 | ||
2455 | *pp = t; | |
2456 | ||
2457 | h->verinfo.vertree = t; | |
2458 | } | |
2459 | else if (t == NULL) | |
2460 | { | |
2461 | /* We could not find the version for a symbol when | |
2462 | generating a shared archive. Return an error. */ | |
4eca0228 | 2463 | _bfd_error_handler |
695344c0 | 2464 | /* xgettext:c-format */ |
871b3ab2 | 2465 | (_("%pB: version node not found for symbol %s"), |
28caa186 | 2466 | info->output_bfd, h->root.root.string); |
45d6a902 AM |
2467 | bfd_set_error (bfd_error_bad_value); |
2468 | sinfo->failed = TRUE; | |
2469 | return FALSE; | |
2470 | } | |
45d6a902 AM |
2471 | } |
2472 | ||
2473 | /* If we don't have a version for this symbol, see if we can find | |
2474 | something. */ | |
099bb8fb L |
2475 | if (!hide |
2476 | && h->verinfo.vertree == NULL | |
2477 | && sinfo->info->version_info != NULL) | |
45d6a902 | 2478 | { |
fd91d419 L |
2479 | h->verinfo.vertree |
2480 | = bfd_find_version_for_sym (sinfo->info->version_info, | |
2481 | h->root.root.string, &hide); | |
1e8fa21e AM |
2482 | if (h->verinfo.vertree != NULL && hide) |
2483 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
45d6a902 AM |
2484 | } |
2485 | ||
2486 | return TRUE; | |
2487 | } | |
2488 | \f | |
45d6a902 AM |
2489 | /* Read and swap the relocs from the section indicated by SHDR. This |
2490 | may be either a REL or a RELA section. The relocations are | |
2491 | translated into RELA relocations and stored in INTERNAL_RELOCS, | |
2492 | which should have already been allocated to contain enough space. | |
2493 | The EXTERNAL_RELOCS are a buffer where the external form of the | |
2494 | relocations should be stored. | |
2495 | ||
2496 | Returns FALSE if something goes wrong. */ | |
2497 | ||
2498 | static bfd_boolean | |
268b6b39 | 2499 | elf_link_read_relocs_from_section (bfd *abfd, |
243ef1e0 | 2500 | asection *sec, |
268b6b39 AM |
2501 | Elf_Internal_Shdr *shdr, |
2502 | void *external_relocs, | |
2503 | Elf_Internal_Rela *internal_relocs) | |
45d6a902 | 2504 | { |
9c5bfbb7 | 2505 | const struct elf_backend_data *bed; |
268b6b39 | 2506 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
45d6a902 AM |
2507 | const bfd_byte *erela; |
2508 | const bfd_byte *erelaend; | |
2509 | Elf_Internal_Rela *irela; | |
243ef1e0 L |
2510 | Elf_Internal_Shdr *symtab_hdr; |
2511 | size_t nsyms; | |
45d6a902 | 2512 | |
45d6a902 AM |
2513 | /* Position ourselves at the start of the section. */ |
2514 | if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0) | |
2515 | return FALSE; | |
2516 | ||
2517 | /* Read the relocations. */ | |
2518 | if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size) | |
2519 | return FALSE; | |
2520 | ||
243ef1e0 | 2521 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
ce98a316 | 2522 | nsyms = NUM_SHDR_ENTRIES (symtab_hdr); |
243ef1e0 | 2523 | |
45d6a902 AM |
2524 | bed = get_elf_backend_data (abfd); |
2525 | ||
2526 | /* Convert the external relocations to the internal format. */ | |
2527 | if (shdr->sh_entsize == bed->s->sizeof_rel) | |
2528 | swap_in = bed->s->swap_reloc_in; | |
2529 | else if (shdr->sh_entsize == bed->s->sizeof_rela) | |
2530 | swap_in = bed->s->swap_reloca_in; | |
2531 | else | |
2532 | { | |
2533 | bfd_set_error (bfd_error_wrong_format); | |
2534 | return FALSE; | |
2535 | } | |
2536 | ||
a50b1753 | 2537 | erela = (const bfd_byte *) external_relocs; |
f55b1e32 AM |
2538 | /* Setting erelaend like this and comparing with <= handles case of |
2539 | a fuzzed object with sh_size not a multiple of sh_entsize. */ | |
2540 | erelaend = erela + shdr->sh_size - shdr->sh_entsize; | |
45d6a902 | 2541 | irela = internal_relocs; |
f55b1e32 | 2542 | while (erela <= erelaend) |
45d6a902 | 2543 | { |
243ef1e0 L |
2544 | bfd_vma r_symndx; |
2545 | ||
45d6a902 | 2546 | (*swap_in) (abfd, erela, irela); |
243ef1e0 L |
2547 | r_symndx = ELF32_R_SYM (irela->r_info); |
2548 | if (bed->s->arch_size == 64) | |
2549 | r_symndx >>= 24; | |
ce98a316 NC |
2550 | if (nsyms > 0) |
2551 | { | |
2552 | if ((size_t) r_symndx >= nsyms) | |
2553 | { | |
4eca0228 | 2554 | _bfd_error_handler |
695344c0 | 2555 | /* xgettext:c-format */ |
2dcf00ce AM |
2556 | (_("%pB: bad reloc symbol index (%#" PRIx64 " >= %#lx)" |
2557 | " for offset %#" PRIx64 " in section `%pA'"), | |
2558 | abfd, (uint64_t) r_symndx, (unsigned long) nsyms, | |
2559 | (uint64_t) irela->r_offset, sec); | |
ce98a316 NC |
2560 | bfd_set_error (bfd_error_bad_value); |
2561 | return FALSE; | |
2562 | } | |
2563 | } | |
cf35638d | 2564 | else if (r_symndx != STN_UNDEF) |
243ef1e0 | 2565 | { |
4eca0228 | 2566 | _bfd_error_handler |
695344c0 | 2567 | /* xgettext:c-format */ |
2dcf00ce AM |
2568 | (_("%pB: non-zero symbol index (%#" PRIx64 ")" |
2569 | " for offset %#" PRIx64 " in section `%pA'" | |
ce98a316 | 2570 | " when the object file has no symbol table"), |
2dcf00ce AM |
2571 | abfd, (uint64_t) r_symndx, |
2572 | (uint64_t) irela->r_offset, sec); | |
243ef1e0 L |
2573 | bfd_set_error (bfd_error_bad_value); |
2574 | return FALSE; | |
2575 | } | |
45d6a902 AM |
2576 | irela += bed->s->int_rels_per_ext_rel; |
2577 | erela += shdr->sh_entsize; | |
2578 | } | |
2579 | ||
2580 | return TRUE; | |
2581 | } | |
2582 | ||
2583 | /* Read and swap the relocs for a section O. They may have been | |
2584 | cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are | |
2585 | not NULL, they are used as buffers to read into. They are known to | |
2586 | be large enough. If the INTERNAL_RELOCS relocs argument is NULL, | |
2587 | the return value is allocated using either malloc or bfd_alloc, | |
2588 | according to the KEEP_MEMORY argument. If O has two relocation | |
2589 | sections (both REL and RELA relocations), then the REL_HDR | |
2590 | relocations will appear first in INTERNAL_RELOCS, followed by the | |
d4730f92 | 2591 | RELA_HDR relocations. */ |
45d6a902 AM |
2592 | |
2593 | Elf_Internal_Rela * | |
268b6b39 AM |
2594 | _bfd_elf_link_read_relocs (bfd *abfd, |
2595 | asection *o, | |
2596 | void *external_relocs, | |
2597 | Elf_Internal_Rela *internal_relocs, | |
2598 | bfd_boolean keep_memory) | |
45d6a902 | 2599 | { |
268b6b39 | 2600 | void *alloc1 = NULL; |
45d6a902 | 2601 | Elf_Internal_Rela *alloc2 = NULL; |
9c5bfbb7 | 2602 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
d4730f92 BS |
2603 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
2604 | Elf_Internal_Rela *internal_rela_relocs; | |
45d6a902 | 2605 | |
d4730f92 BS |
2606 | if (esdo->relocs != NULL) |
2607 | return esdo->relocs; | |
45d6a902 AM |
2608 | |
2609 | if (o->reloc_count == 0) | |
2610 | return NULL; | |
2611 | ||
45d6a902 AM |
2612 | if (internal_relocs == NULL) |
2613 | { | |
2614 | bfd_size_type size; | |
2615 | ||
056bafd4 | 2616 | size = (bfd_size_type) o->reloc_count * sizeof (Elf_Internal_Rela); |
45d6a902 | 2617 | if (keep_memory) |
a50b1753 | 2618 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_alloc (abfd, size); |
45d6a902 | 2619 | else |
a50b1753 | 2620 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); |
45d6a902 AM |
2621 | if (internal_relocs == NULL) |
2622 | goto error_return; | |
2623 | } | |
2624 | ||
2625 | if (external_relocs == NULL) | |
2626 | { | |
d4730f92 BS |
2627 | bfd_size_type size = 0; |
2628 | ||
2629 | if (esdo->rel.hdr) | |
2630 | size += esdo->rel.hdr->sh_size; | |
2631 | if (esdo->rela.hdr) | |
2632 | size += esdo->rela.hdr->sh_size; | |
45d6a902 | 2633 | |
268b6b39 | 2634 | alloc1 = bfd_malloc (size); |
45d6a902 AM |
2635 | if (alloc1 == NULL) |
2636 | goto error_return; | |
2637 | external_relocs = alloc1; | |
2638 | } | |
2639 | ||
d4730f92 BS |
2640 | internal_rela_relocs = internal_relocs; |
2641 | if (esdo->rel.hdr) | |
2642 | { | |
2643 | if (!elf_link_read_relocs_from_section (abfd, o, esdo->rel.hdr, | |
2644 | external_relocs, | |
2645 | internal_relocs)) | |
2646 | goto error_return; | |
2647 | external_relocs = (((bfd_byte *) external_relocs) | |
2648 | + esdo->rel.hdr->sh_size); | |
2649 | internal_rela_relocs += (NUM_SHDR_ENTRIES (esdo->rel.hdr) | |
2650 | * bed->s->int_rels_per_ext_rel); | |
2651 | } | |
2652 | ||
2653 | if (esdo->rela.hdr | |
2654 | && (!elf_link_read_relocs_from_section (abfd, o, esdo->rela.hdr, | |
2655 | external_relocs, | |
2656 | internal_rela_relocs))) | |
45d6a902 AM |
2657 | goto error_return; |
2658 | ||
2659 | /* Cache the results for next time, if we can. */ | |
2660 | if (keep_memory) | |
d4730f92 | 2661 | esdo->relocs = internal_relocs; |
45d6a902 | 2662 | |
c9594989 | 2663 | free (alloc1); |
45d6a902 AM |
2664 | |
2665 | /* Don't free alloc2, since if it was allocated we are passing it | |
2666 | back (under the name of internal_relocs). */ | |
2667 | ||
2668 | return internal_relocs; | |
2669 | ||
2670 | error_return: | |
c9594989 | 2671 | free (alloc1); |
45d6a902 | 2672 | if (alloc2 != NULL) |
4dd07732 AM |
2673 | { |
2674 | if (keep_memory) | |
2675 | bfd_release (abfd, alloc2); | |
2676 | else | |
2677 | free (alloc2); | |
2678 | } | |
45d6a902 AM |
2679 | return NULL; |
2680 | } | |
2681 | ||
2682 | /* Compute the size of, and allocate space for, REL_HDR which is the | |
2683 | section header for a section containing relocations for O. */ | |
2684 | ||
28caa186 | 2685 | static bfd_boolean |
9eaff861 AO |
2686 | _bfd_elf_link_size_reloc_section (bfd *abfd, |
2687 | struct bfd_elf_section_reloc_data *reldata) | |
45d6a902 | 2688 | { |
9eaff861 | 2689 | Elf_Internal_Shdr *rel_hdr = reldata->hdr; |
45d6a902 AM |
2690 | |
2691 | /* That allows us to calculate the size of the section. */ | |
9eaff861 | 2692 | rel_hdr->sh_size = rel_hdr->sh_entsize * reldata->count; |
45d6a902 AM |
2693 | |
2694 | /* The contents field must last into write_object_contents, so we | |
2695 | allocate it with bfd_alloc rather than malloc. Also since we | |
2696 | cannot be sure that the contents will actually be filled in, | |
2697 | we zero the allocated space. */ | |
a50b1753 | 2698 | rel_hdr->contents = (unsigned char *) bfd_zalloc (abfd, rel_hdr->sh_size); |
45d6a902 AM |
2699 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) |
2700 | return FALSE; | |
2701 | ||
d4730f92 | 2702 | if (reldata->hashes == NULL && reldata->count) |
45d6a902 AM |
2703 | { |
2704 | struct elf_link_hash_entry **p; | |
2705 | ||
ca4be51c AM |
2706 | p = ((struct elf_link_hash_entry **) |
2707 | bfd_zmalloc (reldata->count * sizeof (*p))); | |
45d6a902 AM |
2708 | if (p == NULL) |
2709 | return FALSE; | |
2710 | ||
d4730f92 | 2711 | reldata->hashes = p; |
45d6a902 AM |
2712 | } |
2713 | ||
2714 | return TRUE; | |
2715 | } | |
2716 | ||
2717 | /* Copy the relocations indicated by the INTERNAL_RELOCS (which | |
2718 | originated from the section given by INPUT_REL_HDR) to the | |
2719 | OUTPUT_BFD. */ | |
2720 | ||
2721 | bfd_boolean | |
268b6b39 AM |
2722 | _bfd_elf_link_output_relocs (bfd *output_bfd, |
2723 | asection *input_section, | |
2724 | Elf_Internal_Shdr *input_rel_hdr, | |
eac338cf PB |
2725 | Elf_Internal_Rela *internal_relocs, |
2726 | struct elf_link_hash_entry **rel_hash | |
2727 | ATTRIBUTE_UNUSED) | |
45d6a902 AM |
2728 | { |
2729 | Elf_Internal_Rela *irela; | |
2730 | Elf_Internal_Rela *irelaend; | |
2731 | bfd_byte *erel; | |
d4730f92 | 2732 | struct bfd_elf_section_reloc_data *output_reldata; |
45d6a902 | 2733 | asection *output_section; |
9c5bfbb7 | 2734 | const struct elf_backend_data *bed; |
268b6b39 | 2735 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
d4730f92 | 2736 | struct bfd_elf_section_data *esdo; |
45d6a902 AM |
2737 | |
2738 | output_section = input_section->output_section; | |
45d6a902 | 2739 | |
d4730f92 BS |
2740 | bed = get_elf_backend_data (output_bfd); |
2741 | esdo = elf_section_data (output_section); | |
2742 | if (esdo->rel.hdr && esdo->rel.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2743 | { |
d4730f92 BS |
2744 | output_reldata = &esdo->rel; |
2745 | swap_out = bed->s->swap_reloc_out; | |
45d6a902 | 2746 | } |
d4730f92 BS |
2747 | else if (esdo->rela.hdr |
2748 | && esdo->rela.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2749 | { |
d4730f92 BS |
2750 | output_reldata = &esdo->rela; |
2751 | swap_out = bed->s->swap_reloca_out; | |
45d6a902 AM |
2752 | } |
2753 | else | |
2754 | { | |
4eca0228 | 2755 | _bfd_error_handler |
695344c0 | 2756 | /* xgettext:c-format */ |
871b3ab2 | 2757 | (_("%pB: relocation size mismatch in %pB section %pA"), |
d003868e | 2758 | output_bfd, input_section->owner, input_section); |
297d8443 | 2759 | bfd_set_error (bfd_error_wrong_format); |
45d6a902 AM |
2760 | return FALSE; |
2761 | } | |
2762 | ||
d4730f92 BS |
2763 | erel = output_reldata->hdr->contents; |
2764 | erel += output_reldata->count * input_rel_hdr->sh_entsize; | |
45d6a902 AM |
2765 | irela = internal_relocs; |
2766 | irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) | |
2767 | * bed->s->int_rels_per_ext_rel); | |
2768 | while (irela < irelaend) | |
2769 | { | |
2770 | (*swap_out) (output_bfd, irela, erel); | |
2771 | irela += bed->s->int_rels_per_ext_rel; | |
2772 | erel += input_rel_hdr->sh_entsize; | |
2773 | } | |
2774 | ||
2775 | /* Bump the counter, so that we know where to add the next set of | |
2776 | relocations. */ | |
d4730f92 | 2777 | output_reldata->count += NUM_SHDR_ENTRIES (input_rel_hdr); |
45d6a902 AM |
2778 | |
2779 | return TRUE; | |
2780 | } | |
2781 | \f | |
508c3946 L |
2782 | /* Make weak undefined symbols in PIE dynamic. */ |
2783 | ||
2784 | bfd_boolean | |
2785 | _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info *info, | |
2786 | struct elf_link_hash_entry *h) | |
2787 | { | |
0e1862bb | 2788 | if (bfd_link_pie (info) |
508c3946 L |
2789 | && h->dynindx == -1 |
2790 | && h->root.type == bfd_link_hash_undefweak) | |
2791 | return bfd_elf_link_record_dynamic_symbol (info, h); | |
2792 | ||
2793 | return TRUE; | |
2794 | } | |
2795 | ||
45d6a902 AM |
2796 | /* Fix up the flags for a symbol. This handles various cases which |
2797 | can only be fixed after all the input files are seen. This is | |
2798 | currently called by both adjust_dynamic_symbol and | |
2799 | assign_sym_version, which is unnecessary but perhaps more robust in | |
2800 | the face of future changes. */ | |
2801 | ||
28caa186 | 2802 | static bfd_boolean |
268b6b39 AM |
2803 | _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry *h, |
2804 | struct elf_info_failed *eif) | |
45d6a902 | 2805 | { |
33774f08 | 2806 | const struct elf_backend_data *bed; |
508c3946 | 2807 | |
45d6a902 AM |
2808 | /* If this symbol was mentioned in a non-ELF file, try to set |
2809 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
2810 | permit a non-ELF file to correctly refer to a symbol defined in | |
2811 | an ELF dynamic object. */ | |
f5385ebf | 2812 | if (h->non_elf) |
45d6a902 AM |
2813 | { |
2814 | while (h->root.type == bfd_link_hash_indirect) | |
2815 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2816 | ||
2817 | if (h->root.type != bfd_link_hash_defined | |
2818 | && h->root.type != bfd_link_hash_defweak) | |
f5385ebf AM |
2819 | { |
2820 | h->ref_regular = 1; | |
2821 | h->ref_regular_nonweak = 1; | |
2822 | } | |
45d6a902 AM |
2823 | else |
2824 | { | |
2825 | if (h->root.u.def.section->owner != NULL | |
2826 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
2827 | == bfd_target_elf_flavour)) | |
f5385ebf AM |
2828 | { |
2829 | h->ref_regular = 1; | |
2830 | h->ref_regular_nonweak = 1; | |
2831 | } | |
45d6a902 | 2832 | else |
f5385ebf | 2833 | h->def_regular = 1; |
45d6a902 AM |
2834 | } |
2835 | ||
2836 | if (h->dynindx == -1 | |
f5385ebf AM |
2837 | && (h->def_dynamic |
2838 | || h->ref_dynamic)) | |
45d6a902 | 2839 | { |
c152c796 | 2840 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 AM |
2841 | { |
2842 | eif->failed = TRUE; | |
2843 | return FALSE; | |
2844 | } | |
2845 | } | |
2846 | } | |
2847 | else | |
2848 | { | |
f5385ebf | 2849 | /* Unfortunately, NON_ELF is only correct if the symbol |
45d6a902 AM |
2850 | was first seen in a non-ELF file. Fortunately, if the symbol |
2851 | was first seen in an ELF file, we're probably OK unless the | |
2852 | symbol was defined in a non-ELF file. Catch that case here. | |
2853 | FIXME: We're still in trouble if the symbol was first seen in | |
2854 | a dynamic object, and then later in a non-ELF regular object. */ | |
2855 | if ((h->root.type == bfd_link_hash_defined | |
2856 | || h->root.type == bfd_link_hash_defweak) | |
f5385ebf | 2857 | && !h->def_regular |
45d6a902 AM |
2858 | && (h->root.u.def.section->owner != NULL |
2859 | ? (bfd_get_flavour (h->root.u.def.section->owner) | |
2860 | != bfd_target_elf_flavour) | |
2861 | : (bfd_is_abs_section (h->root.u.def.section) | |
f5385ebf AM |
2862 | && !h->def_dynamic))) |
2863 | h->def_regular = 1; | |
45d6a902 AM |
2864 | } |
2865 | ||
508c3946 | 2866 | /* Backend specific symbol fixup. */ |
33774f08 AM |
2867 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); |
2868 | if (bed->elf_backend_fixup_symbol | |
2869 | && !(*bed->elf_backend_fixup_symbol) (eif->info, h)) | |
2870 | return FALSE; | |
508c3946 | 2871 | |
45d6a902 AM |
2872 | /* If this is a final link, and the symbol was defined as a common |
2873 | symbol in a regular object file, and there was no definition in | |
2874 | any dynamic object, then the linker will have allocated space for | |
f5385ebf | 2875 | the symbol in a common section but the DEF_REGULAR |
45d6a902 AM |
2876 | flag will not have been set. */ |
2877 | if (h->root.type == bfd_link_hash_defined | |
f5385ebf AM |
2878 | && !h->def_regular |
2879 | && h->ref_regular | |
2880 | && !h->def_dynamic | |
96f29d96 | 2881 | && (h->root.u.def.section->owner->flags & (DYNAMIC | BFD_PLUGIN)) == 0) |
f5385ebf | 2882 | h->def_regular = 1; |
45d6a902 | 2883 | |
af0bfb9c AM |
2884 | /* Symbols defined in discarded sections shouldn't be dynamic. */ |
2885 | if (h->root.type == bfd_link_hash_undefined && h->indx == -3) | |
2886 | (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE); | |
2887 | ||
4deb8f71 L |
2888 | /* If a weak undefined symbol has non-default visibility, we also |
2889 | hide it from the dynamic linker. */ | |
af0bfb9c AM |
2890 | else if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
2891 | && h->root.type == bfd_link_hash_undefweak) | |
4deb8f71 L |
2892 | (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE); |
2893 | ||
2894 | /* A hidden versioned symbol in executable should be forced local if | |
2895 | it is is locally defined, not referenced by shared library and not | |
2896 | exported. */ | |
2897 | else if (bfd_link_executable (eif->info) | |
2898 | && h->versioned == versioned_hidden | |
2899 | && !eif->info->export_dynamic | |
2900 | && !h->dynamic | |
2901 | && !h->ref_dynamic | |
2902 | && h->def_regular) | |
2903 | (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE); | |
2904 | ||
45d6a902 AM |
2905 | /* If -Bsymbolic was used (which means to bind references to global |
2906 | symbols to the definition within the shared object), and this | |
2907 | symbol was defined in a regular object, then it actually doesn't | |
9c7a29a3 AM |
2908 | need a PLT entry. Likewise, if the symbol has non-default |
2909 | visibility. If the symbol has hidden or internal visibility, we | |
c1be741f | 2910 | will force it local. */ |
4deb8f71 L |
2911 | else if (h->needs_plt |
2912 | && bfd_link_pic (eif->info) | |
2913 | && is_elf_hash_table (eif->info->hash) | |
2914 | && (SYMBOLIC_BIND (eif->info, h) | |
2915 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2916 | && h->def_regular) | |
45d6a902 | 2917 | { |
45d6a902 AM |
2918 | bfd_boolean force_local; |
2919 | ||
45d6a902 AM |
2920 | force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL |
2921 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN); | |
2922 | (*bed->elf_backend_hide_symbol) (eif->info, h, force_local); | |
2923 | } | |
2924 | ||
45d6a902 AM |
2925 | /* If this is a weak defined symbol in a dynamic object, and we know |
2926 | the real definition in the dynamic object, copy interesting flags | |
2927 | over to the real definition. */ | |
60d67dc8 | 2928 | if (h->is_weakalias) |
45d6a902 | 2929 | { |
60d67dc8 AM |
2930 | struct elf_link_hash_entry *def = weakdef (h); |
2931 | ||
45d6a902 AM |
2932 | /* If the real definition is defined by a regular object file, |
2933 | don't do anything special. See the longer description in | |
5b9d7a9a AM |
2934 | _bfd_elf_adjust_dynamic_symbol, below. If the def is not |
2935 | bfd_link_hash_defined as it was when put on the alias list | |
2936 | then it must have originally been a versioned symbol (for | |
2937 | which a non-versioned indirect symbol is created) and later | |
2938 | a definition for the non-versioned symbol is found. In that | |
2939 | case the indirection is flipped with the versioned symbol | |
2940 | becoming an indirect pointing at the non-versioned symbol. | |
2941 | Thus, not an alias any more. */ | |
2942 | if (def->def_regular | |
2943 | || def->root.type != bfd_link_hash_defined) | |
60d67dc8 AM |
2944 | { |
2945 | h = def; | |
2946 | while ((h = h->u.alias) != def) | |
2947 | h->is_weakalias = 0; | |
2948 | } | |
45d6a902 | 2949 | else |
a26587ba | 2950 | { |
4e6b54a6 AM |
2951 | while (h->root.type == bfd_link_hash_indirect) |
2952 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4e6b54a6 AM |
2953 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
2954 | || h->root.type == bfd_link_hash_defweak); | |
60d67dc8 | 2955 | BFD_ASSERT (def->def_dynamic); |
60d67dc8 | 2956 | (*bed->elf_backend_copy_indirect_symbol) (eif->info, def, h); |
a26587ba | 2957 | } |
45d6a902 AM |
2958 | } |
2959 | ||
2960 | return TRUE; | |
2961 | } | |
2962 | ||
2963 | /* Make the backend pick a good value for a dynamic symbol. This is | |
2964 | called via elf_link_hash_traverse, and also calls itself | |
2965 | recursively. */ | |
2966 | ||
28caa186 | 2967 | static bfd_boolean |
268b6b39 | 2968 | _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2969 | { |
a50b1753 | 2970 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
559192d8 | 2971 | struct elf_link_hash_table *htab; |
9c5bfbb7 | 2972 | const struct elf_backend_data *bed; |
45d6a902 | 2973 | |
0eddce27 | 2974 | if (! is_elf_hash_table (eif->info->hash)) |
45d6a902 AM |
2975 | return FALSE; |
2976 | ||
45d6a902 AM |
2977 | /* Ignore indirect symbols. These are added by the versioning code. */ |
2978 | if (h->root.type == bfd_link_hash_indirect) | |
2979 | return TRUE; | |
2980 | ||
2981 | /* Fix the symbol flags. */ | |
2982 | if (! _bfd_elf_fix_symbol_flags (h, eif)) | |
2983 | return FALSE; | |
2984 | ||
559192d8 AM |
2985 | htab = elf_hash_table (eif->info); |
2986 | bed = get_elf_backend_data (htab->dynobj); | |
2987 | ||
954b63d4 AM |
2988 | if (h->root.type == bfd_link_hash_undefweak) |
2989 | { | |
2990 | if (eif->info->dynamic_undefined_weak == 0) | |
559192d8 | 2991 | (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE); |
954b63d4 AM |
2992 | else if (eif->info->dynamic_undefined_weak > 0 |
2993 | && h->ref_regular | |
2994 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2995 | && !bfd_hide_sym_by_version (eif->info->version_info, | |
2996 | h->root.root.string)) | |
2997 | { | |
2998 | if (!bfd_elf_link_record_dynamic_symbol (eif->info, h)) | |
2999 | { | |
3000 | eif->failed = TRUE; | |
3001 | return FALSE; | |
3002 | } | |
3003 | } | |
3004 | } | |
3005 | ||
45d6a902 AM |
3006 | /* If this symbol does not require a PLT entry, and it is not |
3007 | defined by a dynamic object, or is not referenced by a regular | |
3008 | object, ignore it. We do have to handle a weak defined symbol, | |
3009 | even if no regular object refers to it, if we decided to add it | |
3010 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
3011 | about symbols which are defined by one dynamic object and | |
3012 | referenced by another one? */ | |
f5385ebf | 3013 | if (!h->needs_plt |
91e21fb7 | 3014 | && h->type != STT_GNU_IFUNC |
f5385ebf AM |
3015 | && (h->def_regular |
3016 | || !h->def_dynamic | |
3017 | || (!h->ref_regular | |
60d67dc8 | 3018 | && (!h->is_weakalias || weakdef (h)->dynindx == -1)))) |
45d6a902 | 3019 | { |
a6aa5195 | 3020 | h->plt = elf_hash_table (eif->info)->init_plt_offset; |
45d6a902 AM |
3021 | return TRUE; |
3022 | } | |
3023 | ||
3024 | /* If we've already adjusted this symbol, don't do it again. This | |
3025 | can happen via a recursive call. */ | |
f5385ebf | 3026 | if (h->dynamic_adjusted) |
45d6a902 AM |
3027 | return TRUE; |
3028 | ||
3029 | /* Don't look at this symbol again. Note that we must set this | |
3030 | after checking the above conditions, because we may look at a | |
3031 | symbol once, decide not to do anything, and then get called | |
3032 | recursively later after REF_REGULAR is set below. */ | |
f5385ebf | 3033 | h->dynamic_adjusted = 1; |
45d6a902 AM |
3034 | |
3035 | /* If this is a weak definition, and we know a real definition, and | |
3036 | the real symbol is not itself defined by a regular object file, | |
3037 | then get a good value for the real definition. We handle the | |
3038 | real symbol first, for the convenience of the backend routine. | |
3039 | ||
3040 | Note that there is a confusing case here. If the real definition | |
3041 | is defined by a regular object file, we don't get the real symbol | |
3042 | from the dynamic object, but we do get the weak symbol. If the | |
3043 | processor backend uses a COPY reloc, then if some routine in the | |
3044 | dynamic object changes the real symbol, we will not see that | |
3045 | change in the corresponding weak symbol. This is the way other | |
3046 | ELF linkers work as well, and seems to be a result of the shared | |
3047 | library model. | |
3048 | ||
3049 | I will clarify this issue. Most SVR4 shared libraries define the | |
3050 | variable _timezone and define timezone as a weak synonym. The | |
3051 | tzset call changes _timezone. If you write | |
3052 | extern int timezone; | |
3053 | int _timezone = 5; | |
3054 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
3055 | you might expect that, since timezone is a synonym for _timezone, | |
3056 | the same number will print both times. However, if the processor | |
3057 | backend uses a COPY reloc, then actually timezone will be copied | |
3058 | into your process image, and, since you define _timezone | |
3059 | yourself, _timezone will not. Thus timezone and _timezone will | |
3060 | wind up at different memory locations. The tzset call will set | |
3061 | _timezone, leaving timezone unchanged. */ | |
3062 | ||
60d67dc8 | 3063 | if (h->is_weakalias) |
45d6a902 | 3064 | { |
60d67dc8 AM |
3065 | struct elf_link_hash_entry *def = weakdef (h); |
3066 | ||
ec24dc88 | 3067 | /* If we get to this point, there is an implicit reference to |
60d67dc8 AM |
3068 | the alias by a regular object file via the weak symbol H. */ |
3069 | def->ref_regular = 1; | |
45d6a902 | 3070 | |
ec24dc88 | 3071 | /* Ensure that the backend adjust_dynamic_symbol function sees |
60d67dc8 AM |
3072 | the strong alias before H by recursively calling ourselves. */ |
3073 | if (!_bfd_elf_adjust_dynamic_symbol (def, eif)) | |
45d6a902 AM |
3074 | return FALSE; |
3075 | } | |
3076 | ||
3077 | /* If a symbol has no type and no size and does not require a PLT | |
3078 | entry, then we are probably about to do the wrong thing here: we | |
3079 | are probably going to create a COPY reloc for an empty object. | |
3080 | This case can arise when a shared object is built with assembly | |
3081 | code, and the assembly code fails to set the symbol type. */ | |
3082 | if (h->size == 0 | |
3083 | && h->type == STT_NOTYPE | |
f5385ebf | 3084 | && !h->needs_plt) |
4eca0228 | 3085 | _bfd_error_handler |
45d6a902 AM |
3086 | (_("warning: type and size of dynamic symbol `%s' are not defined"), |
3087 | h->root.root.string); | |
3088 | ||
45d6a902 AM |
3089 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) |
3090 | { | |
3091 | eif->failed = TRUE; | |
3092 | return FALSE; | |
3093 | } | |
3094 | ||
3095 | return TRUE; | |
3096 | } | |
3097 | ||
027297b7 L |
3098 | /* Adjust the dynamic symbol, H, for copy in the dynamic bss section, |
3099 | DYNBSS. */ | |
3100 | ||
3101 | bfd_boolean | |
6cabe1ea AM |
3102 | _bfd_elf_adjust_dynamic_copy (struct bfd_link_info *info, |
3103 | struct elf_link_hash_entry *h, | |
027297b7 L |
3104 | asection *dynbss) |
3105 | { | |
91ac5911 | 3106 | unsigned int power_of_two; |
027297b7 L |
3107 | bfd_vma mask; |
3108 | asection *sec = h->root.u.def.section; | |
3109 | ||
de194d85 | 3110 | /* The section alignment of the definition is the maximum alignment |
91ac5911 L |
3111 | requirement of symbols defined in the section. Since we don't |
3112 | know the symbol alignment requirement, we start with the | |
3113 | maximum alignment and check low bits of the symbol address | |
3114 | for the minimum alignment. */ | |
fd361982 | 3115 | power_of_two = bfd_section_alignment (sec); |
91ac5911 L |
3116 | mask = ((bfd_vma) 1 << power_of_two) - 1; |
3117 | while ((h->root.u.def.value & mask) != 0) | |
3118 | { | |
3119 | mask >>= 1; | |
3120 | --power_of_two; | |
3121 | } | |
027297b7 | 3122 | |
fd361982 | 3123 | if (power_of_two > bfd_section_alignment (dynbss)) |
027297b7 L |
3124 | { |
3125 | /* Adjust the section alignment if needed. */ | |
fd361982 | 3126 | if (!bfd_set_section_alignment (dynbss, power_of_two)) |
027297b7 L |
3127 | return FALSE; |
3128 | } | |
3129 | ||
91ac5911 | 3130 | /* We make sure that the symbol will be aligned properly. */ |
027297b7 L |
3131 | dynbss->size = BFD_ALIGN (dynbss->size, mask + 1); |
3132 | ||
3133 | /* Define the symbol as being at this point in DYNBSS. */ | |
3134 | h->root.u.def.section = dynbss; | |
3135 | h->root.u.def.value = dynbss->size; | |
3136 | ||
3137 | /* Increment the size of DYNBSS to make room for the symbol. */ | |
3138 | dynbss->size += h->size; | |
3139 | ||
f7483970 L |
3140 | /* No error if extern_protected_data is true. */ |
3141 | if (h->protected_def | |
889c2a67 L |
3142 | && (!info->extern_protected_data |
3143 | || (info->extern_protected_data < 0 | |
3144 | && !get_elf_backend_data (dynbss->owner)->extern_protected_data))) | |
d07a1b05 | 3145 | info->callbacks->einfo |
c1c8c1ef | 3146 | (_("%P: copy reloc against protected `%pT' is dangerous\n"), |
d07a1b05 | 3147 | h->root.root.string); |
6cabe1ea | 3148 | |
027297b7 L |
3149 | return TRUE; |
3150 | } | |
3151 | ||
45d6a902 AM |
3152 | /* Adjust all external symbols pointing into SEC_MERGE sections |
3153 | to reflect the object merging within the sections. */ | |
3154 | ||
28caa186 | 3155 | static bfd_boolean |
268b6b39 | 3156 | _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry *h, void *data) |
45d6a902 AM |
3157 | { |
3158 | asection *sec; | |
3159 | ||
45d6a902 AM |
3160 | if ((h->root.type == bfd_link_hash_defined |
3161 | || h->root.type == bfd_link_hash_defweak) | |
3162 | && ((sec = h->root.u.def.section)->flags & SEC_MERGE) | |
dbaa2011 | 3163 | && sec->sec_info_type == SEC_INFO_TYPE_MERGE) |
45d6a902 | 3164 | { |
a50b1753 | 3165 | bfd *output_bfd = (bfd *) data; |
45d6a902 AM |
3166 | |
3167 | h->root.u.def.value = | |
3168 | _bfd_merged_section_offset (output_bfd, | |
3169 | &h->root.u.def.section, | |
3170 | elf_section_data (sec)->sec_info, | |
753731ee | 3171 | h->root.u.def.value); |
45d6a902 AM |
3172 | } |
3173 | ||
3174 | return TRUE; | |
3175 | } | |
986a241f RH |
3176 | |
3177 | /* Returns false if the symbol referred to by H should be considered | |
3178 | to resolve local to the current module, and true if it should be | |
3179 | considered to bind dynamically. */ | |
3180 | ||
3181 | bfd_boolean | |
268b6b39 AM |
3182 | _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, |
3183 | struct bfd_link_info *info, | |
89a2ee5a | 3184 | bfd_boolean not_local_protected) |
986a241f RH |
3185 | { |
3186 | bfd_boolean binding_stays_local_p; | |
fcb93ecf PB |
3187 | const struct elf_backend_data *bed; |
3188 | struct elf_link_hash_table *hash_table; | |
986a241f RH |
3189 | |
3190 | if (h == NULL) | |
3191 | return FALSE; | |
3192 | ||
3193 | while (h->root.type == bfd_link_hash_indirect | |
3194 | || h->root.type == bfd_link_hash_warning) | |
3195 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3196 | ||
3197 | /* If it was forced local, then clearly it's not dynamic. */ | |
3198 | if (h->dynindx == -1) | |
3199 | return FALSE; | |
f5385ebf | 3200 | if (h->forced_local) |
986a241f RH |
3201 | return FALSE; |
3202 | ||
3203 | /* Identify the cases where name binding rules say that a | |
3204 | visible symbol resolves locally. */ | |
0e1862bb L |
3205 | binding_stays_local_p = (bfd_link_executable (info) |
3206 | || SYMBOLIC_BIND (info, h)); | |
986a241f RH |
3207 | |
3208 | switch (ELF_ST_VISIBILITY (h->other)) | |
3209 | { | |
3210 | case STV_INTERNAL: | |
3211 | case STV_HIDDEN: | |
3212 | return FALSE; | |
3213 | ||
3214 | case STV_PROTECTED: | |
fcb93ecf PB |
3215 | hash_table = elf_hash_table (info); |
3216 | if (!is_elf_hash_table (hash_table)) | |
3217 | return FALSE; | |
3218 | ||
3219 | bed = get_elf_backend_data (hash_table->dynobj); | |
3220 | ||
986a241f RH |
3221 | /* Proper resolution for function pointer equality may require |
3222 | that these symbols perhaps be resolved dynamically, even though | |
3223 | we should be resolving them to the current module. */ | |
89a2ee5a | 3224 | if (!not_local_protected || !bed->is_function_type (h->type)) |
986a241f RH |
3225 | binding_stays_local_p = TRUE; |
3226 | break; | |
3227 | ||
3228 | default: | |
986a241f RH |
3229 | break; |
3230 | } | |
3231 | ||
aa37626c | 3232 | /* If it isn't defined locally, then clearly it's dynamic. */ |
89a2ee5a | 3233 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
aa37626c L |
3234 | return TRUE; |
3235 | ||
986a241f RH |
3236 | /* Otherwise, the symbol is dynamic if binding rules don't tell |
3237 | us that it remains local. */ | |
3238 | return !binding_stays_local_p; | |
3239 | } | |
f6c52c13 AM |
3240 | |
3241 | /* Return true if the symbol referred to by H should be considered | |
3242 | to resolve local to the current module, and false otherwise. Differs | |
3243 | from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of | |
2e76e85a | 3244 | undefined symbols. The two functions are virtually identical except |
0fad2956 MR |
3245 | for the place where dynindx == -1 is tested. If that test is true, |
3246 | _bfd_elf_dynamic_symbol_p will say the symbol is local, while | |
3247 | _bfd_elf_symbol_refs_local_p will say the symbol is local only for | |
3248 | defined symbols. | |
89a2ee5a AM |
3249 | It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as |
3250 | !_bfd_elf_symbol_refs_local_p, except that targets differ in their | |
3251 | treatment of undefined weak symbols. For those that do not make | |
3252 | undefined weak symbols dynamic, both functions may return false. */ | |
f6c52c13 AM |
3253 | |
3254 | bfd_boolean | |
268b6b39 AM |
3255 | _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry *h, |
3256 | struct bfd_link_info *info, | |
3257 | bfd_boolean local_protected) | |
f6c52c13 | 3258 | { |
fcb93ecf PB |
3259 | const struct elf_backend_data *bed; |
3260 | struct elf_link_hash_table *hash_table; | |
3261 | ||
f6c52c13 AM |
3262 | /* If it's a local sym, of course we resolve locally. */ |
3263 | if (h == NULL) | |
3264 | return TRUE; | |
3265 | ||
d95edcac L |
3266 | /* STV_HIDDEN or STV_INTERNAL ones must be local. */ |
3267 | if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
3268 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
3269 | return TRUE; | |
3270 | ||
0fad2956 MR |
3271 | /* Forced local symbols resolve locally. */ |
3272 | if (h->forced_local) | |
3273 | return TRUE; | |
3274 | ||
7e2294f9 AO |
3275 | /* Common symbols that become definitions don't get the DEF_REGULAR |
3276 | flag set, so test it first, and don't bail out. */ | |
3277 | if (ELF_COMMON_DEF_P (h)) | |
3278 | /* Do nothing. */; | |
f6c52c13 | 3279 | /* If we don't have a definition in a regular file, then we can't |
49ff44d6 L |
3280 | resolve locally. The sym is either undefined or dynamic. */ |
3281 | else if (!h->def_regular) | |
f6c52c13 AM |
3282 | return FALSE; |
3283 | ||
0fad2956 | 3284 | /* Non-dynamic symbols resolve locally. */ |
f6c52c13 AM |
3285 | if (h->dynindx == -1) |
3286 | return TRUE; | |
3287 | ||
3288 | /* At this point, we know the symbol is defined and dynamic. In an | |
3289 | executable it must resolve locally, likewise when building symbolic | |
3290 | shared libraries. */ | |
0e1862bb | 3291 | if (bfd_link_executable (info) || SYMBOLIC_BIND (info, h)) |
f6c52c13 AM |
3292 | return TRUE; |
3293 | ||
3294 | /* Now deal with defined dynamic symbols in shared libraries. Ones | |
3295 | with default visibility might not resolve locally. */ | |
3296 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
3297 | return FALSE; | |
3298 | ||
fcb93ecf PB |
3299 | hash_table = elf_hash_table (info); |
3300 | if (!is_elf_hash_table (hash_table)) | |
3301 | return TRUE; | |
3302 | ||
3303 | bed = get_elf_backend_data (hash_table->dynobj); | |
3304 | ||
f7483970 L |
3305 | /* If extern_protected_data is false, STV_PROTECTED non-function |
3306 | symbols are local. */ | |
889c2a67 L |
3307 | if ((!info->extern_protected_data |
3308 | || (info->extern_protected_data < 0 | |
3309 | && !bed->extern_protected_data)) | |
3310 | && !bed->is_function_type (h->type)) | |
1c16dfa5 L |
3311 | return TRUE; |
3312 | ||
f6c52c13 | 3313 | /* Function pointer equality tests may require that STV_PROTECTED |
2676a7d9 AM |
3314 | symbols be treated as dynamic symbols. If the address of a |
3315 | function not defined in an executable is set to that function's | |
3316 | plt entry in the executable, then the address of the function in | |
3317 | a shared library must also be the plt entry in the executable. */ | |
f6c52c13 AM |
3318 | return local_protected; |
3319 | } | |
e1918d23 AM |
3320 | |
3321 | /* Caches some TLS segment info, and ensures that the TLS segment vma is | |
3322 | aligned. Returns the first TLS output section. */ | |
3323 | ||
3324 | struct bfd_section * | |
3325 | _bfd_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) | |
3326 | { | |
3327 | struct bfd_section *sec, *tls; | |
3328 | unsigned int align = 0; | |
3329 | ||
3330 | for (sec = obfd->sections; sec != NULL; sec = sec->next) | |
3331 | if ((sec->flags & SEC_THREAD_LOCAL) != 0) | |
3332 | break; | |
3333 | tls = sec; | |
3334 | ||
3335 | for (; sec != NULL && (sec->flags & SEC_THREAD_LOCAL) != 0; sec = sec->next) | |
3336 | if (sec->alignment_power > align) | |
3337 | align = sec->alignment_power; | |
3338 | ||
3339 | elf_hash_table (info)->tls_sec = tls; | |
3340 | ||
fdde2fb6 SH |
3341 | /* Ensure the alignment of the first section (usually .tdata) is the largest |
3342 | alignment, so that the tls segment starts aligned. */ | |
e1918d23 AM |
3343 | if (tls != NULL) |
3344 | tls->alignment_power = align; | |
3345 | ||
3346 | return tls; | |
3347 | } | |
0ad989f9 L |
3348 | |
3349 | /* Return TRUE iff this is a non-common, definition of a non-function symbol. */ | |
3350 | static bfd_boolean | |
3351 | is_global_data_symbol_definition (bfd *abfd ATTRIBUTE_UNUSED, | |
3352 | Elf_Internal_Sym *sym) | |
3353 | { | |
a4d8e49b L |
3354 | const struct elf_backend_data *bed; |
3355 | ||
0ad989f9 L |
3356 | /* Local symbols do not count, but target specific ones might. */ |
3357 | if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL | |
3358 | && ELF_ST_BIND (sym->st_info) < STB_LOOS) | |
3359 | return FALSE; | |
3360 | ||
fcb93ecf | 3361 | bed = get_elf_backend_data (abfd); |
0ad989f9 | 3362 | /* Function symbols do not count. */ |
fcb93ecf | 3363 | if (bed->is_function_type (ELF_ST_TYPE (sym->st_info))) |
0ad989f9 L |
3364 | return FALSE; |
3365 | ||
3366 | /* If the section is undefined, then so is the symbol. */ | |
3367 | if (sym->st_shndx == SHN_UNDEF) | |
3368 | return FALSE; | |
3369 | ||
3370 | /* If the symbol is defined in the common section, then | |
3371 | it is a common definition and so does not count. */ | |
a4d8e49b | 3372 | if (bed->common_definition (sym)) |
0ad989f9 L |
3373 | return FALSE; |
3374 | ||
3375 | /* If the symbol is in a target specific section then we | |
3376 | must rely upon the backend to tell us what it is. */ | |
3377 | if (sym->st_shndx >= SHN_LORESERVE && sym->st_shndx < SHN_ABS) | |
3378 | /* FIXME - this function is not coded yet: | |
3379 | ||
3380 | return _bfd_is_global_symbol_definition (abfd, sym); | |
3381 | ||
3382 | Instead for now assume that the definition is not global, | |
3383 | Even if this is wrong, at least the linker will behave | |
3384 | in the same way that it used to do. */ | |
3385 | return FALSE; | |
3386 | ||
3387 | return TRUE; | |
3388 | } | |
3389 | ||
3390 | /* Search the symbol table of the archive element of the archive ABFD | |
3391 | whose archive map contains a mention of SYMDEF, and determine if | |
3392 | the symbol is defined in this element. */ | |
3393 | static bfd_boolean | |
3394 | elf_link_is_defined_archive_symbol (bfd * abfd, carsym * symdef) | |
3395 | { | |
3396 | Elf_Internal_Shdr * hdr; | |
ef53be89 AM |
3397 | size_t symcount; |
3398 | size_t extsymcount; | |
3399 | size_t extsymoff; | |
0ad989f9 L |
3400 | Elf_Internal_Sym *isymbuf; |
3401 | Elf_Internal_Sym *isym; | |
3402 | Elf_Internal_Sym *isymend; | |
3403 | bfd_boolean result; | |
3404 | ||
3405 | abfd = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
3406 | if (abfd == NULL) | |
3407 | return FALSE; | |
3408 | ||
3409 | if (! bfd_check_format (abfd, bfd_object)) | |
3410 | return FALSE; | |
3411 | ||
7dc3990e L |
3412 | /* Select the appropriate symbol table. If we don't know if the |
3413 | object file is an IR object, give linker LTO plugin a chance to | |
3414 | get the correct symbol table. */ | |
3415 | if (abfd->plugin_format == bfd_plugin_yes | |
08ce1d72 | 3416 | #if BFD_SUPPORTS_PLUGINS |
7dc3990e L |
3417 | || (abfd->plugin_format == bfd_plugin_unknown |
3418 | && bfd_link_plugin_object_p (abfd)) | |
3419 | #endif | |
3420 | ) | |
3421 | { | |
3422 | /* Use the IR symbol table if the object has been claimed by | |
3423 | plugin. */ | |
3424 | abfd = abfd->plugin_dummy_bfd; | |
3425 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
3426 | } | |
3427 | else if ((abfd->flags & DYNAMIC) == 0 || elf_dynsymtab (abfd) == 0) | |
0ad989f9 L |
3428 | hdr = &elf_tdata (abfd)->symtab_hdr; |
3429 | else | |
3430 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
3431 | ||
3432 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
3433 | ||
3434 | /* The sh_info field of the symtab header tells us where the | |
3435 | external symbols start. We don't care about the local symbols. */ | |
3436 | if (elf_bad_symtab (abfd)) | |
3437 | { | |
3438 | extsymcount = symcount; | |
3439 | extsymoff = 0; | |
3440 | } | |
3441 | else | |
3442 | { | |
3443 | extsymcount = symcount - hdr->sh_info; | |
3444 | extsymoff = hdr->sh_info; | |
3445 | } | |
3446 | ||
3447 | if (extsymcount == 0) | |
3448 | return FALSE; | |
3449 | ||
3450 | /* Read in the symbol table. */ | |
3451 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
3452 | NULL, NULL, NULL); | |
3453 | if (isymbuf == NULL) | |
3454 | return FALSE; | |
3455 | ||
3456 | /* Scan the symbol table looking for SYMDEF. */ | |
3457 | result = FALSE; | |
3458 | for (isym = isymbuf, isymend = isymbuf + extsymcount; isym < isymend; isym++) | |
3459 | { | |
3460 | const char *name; | |
3461 | ||
3462 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
3463 | isym->st_name); | |
3464 | if (name == NULL) | |
3465 | break; | |
3466 | ||
3467 | if (strcmp (name, symdef->name) == 0) | |
3468 | { | |
3469 | result = is_global_data_symbol_definition (abfd, isym); | |
3470 | break; | |
3471 | } | |
3472 | } | |
3473 | ||
3474 | free (isymbuf); | |
3475 | ||
3476 | return result; | |
3477 | } | |
3478 | \f | |
5a580b3a AM |
3479 | /* Add an entry to the .dynamic table. */ |
3480 | ||
3481 | bfd_boolean | |
3482 | _bfd_elf_add_dynamic_entry (struct bfd_link_info *info, | |
3483 | bfd_vma tag, | |
3484 | bfd_vma val) | |
3485 | { | |
3486 | struct elf_link_hash_table *hash_table; | |
3487 | const struct elf_backend_data *bed; | |
3488 | asection *s; | |
3489 | bfd_size_type newsize; | |
3490 | bfd_byte *newcontents; | |
3491 | Elf_Internal_Dyn dyn; | |
3492 | ||
3493 | hash_table = elf_hash_table (info); | |
3494 | if (! is_elf_hash_table (hash_table)) | |
3495 | return FALSE; | |
3496 | ||
7f923b7f AM |
3497 | if (tag == DT_RELA || tag == DT_REL) |
3498 | hash_table->dynamic_relocs = TRUE; | |
3499 | ||
5a580b3a | 3500 | bed = get_elf_backend_data (hash_table->dynobj); |
3d4d4302 | 3501 | s = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
5a580b3a AM |
3502 | BFD_ASSERT (s != NULL); |
3503 | ||
eea6121a | 3504 | newsize = s->size + bed->s->sizeof_dyn; |
a50b1753 | 3505 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); |
5a580b3a AM |
3506 | if (newcontents == NULL) |
3507 | return FALSE; | |
3508 | ||
3509 | dyn.d_tag = tag; | |
3510 | dyn.d_un.d_val = val; | |
eea6121a | 3511 | bed->s->swap_dyn_out (hash_table->dynobj, &dyn, newcontents + s->size); |
5a580b3a | 3512 | |
eea6121a | 3513 | s->size = newsize; |
5a580b3a AM |
3514 | s->contents = newcontents; |
3515 | ||
3516 | return TRUE; | |
3517 | } | |
3518 | ||
6f6fd151 L |
3519 | /* Strip zero-sized dynamic sections. */ |
3520 | ||
3521 | bfd_boolean | |
3522 | _bfd_elf_strip_zero_sized_dynamic_sections (struct bfd_link_info *info) | |
3523 | { | |
3524 | struct elf_link_hash_table *hash_table; | |
3525 | const struct elf_backend_data *bed; | |
3526 | asection *s, *sdynamic, **pp; | |
3527 | asection *rela_dyn, *rel_dyn; | |
3528 | Elf_Internal_Dyn dyn; | |
3529 | bfd_byte *extdyn, *next; | |
3530 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
3531 | bfd_boolean strip_zero_sized; | |
3532 | bfd_boolean strip_zero_sized_plt; | |
3533 | ||
3534 | if (bfd_link_relocatable (info)) | |
3535 | return TRUE; | |
3536 | ||
3537 | hash_table = elf_hash_table (info); | |
3538 | if (!is_elf_hash_table (hash_table)) | |
3539 | return FALSE; | |
3540 | ||
3541 | if (!hash_table->dynobj) | |
3542 | return TRUE; | |
3543 | ||
3544 | sdynamic= bfd_get_linker_section (hash_table->dynobj, ".dynamic"); | |
3545 | if (!sdynamic) | |
3546 | return TRUE; | |
3547 | ||
3548 | bed = get_elf_backend_data (hash_table->dynobj); | |
3549 | swap_dyn_in = bed->s->swap_dyn_in; | |
3550 | ||
3551 | strip_zero_sized = FALSE; | |
3552 | strip_zero_sized_plt = FALSE; | |
3553 | ||
3554 | /* Strip zero-sized dynamic sections. */ | |
3555 | rela_dyn = bfd_get_section_by_name (info->output_bfd, ".rela.dyn"); | |
3556 | rel_dyn = bfd_get_section_by_name (info->output_bfd, ".rel.dyn"); | |
3557 | for (pp = &info->output_bfd->sections; (s = *pp) != NULL;) | |
3558 | if (s->size == 0 | |
3559 | && (s == rela_dyn | |
3560 | || s == rel_dyn | |
3561 | || s == hash_table->srelplt->output_section | |
3562 | || s == hash_table->splt->output_section)) | |
3563 | { | |
3564 | *pp = s->next; | |
3565 | info->output_bfd->section_count--; | |
3566 | strip_zero_sized = TRUE; | |
3567 | if (s == rela_dyn) | |
3568 | s = rela_dyn; | |
3569 | if (s == rel_dyn) | |
3570 | s = rel_dyn; | |
3571 | else if (s == hash_table->splt->output_section) | |
3572 | { | |
3573 | s = hash_table->splt; | |
3574 | strip_zero_sized_plt = TRUE; | |
3575 | } | |
3576 | else | |
3577 | s = hash_table->srelplt; | |
3578 | s->flags |= SEC_EXCLUDE; | |
3579 | s->output_section = bfd_abs_section_ptr; | |
3580 | } | |
3581 | else | |
3582 | pp = &s->next; | |
3583 | ||
3584 | if (strip_zero_sized_plt) | |
3585 | for (extdyn = sdynamic->contents; | |
3586 | extdyn < sdynamic->contents + sdynamic->size; | |
3587 | extdyn = next) | |
3588 | { | |
3589 | next = extdyn + bed->s->sizeof_dyn; | |
3590 | swap_dyn_in (hash_table->dynobj, extdyn, &dyn); | |
3591 | switch (dyn.d_tag) | |
3592 | { | |
3593 | default: | |
3594 | break; | |
3595 | case DT_JMPREL: | |
3596 | case DT_PLTRELSZ: | |
3597 | case DT_PLTREL: | |
3598 | /* Strip DT_PLTRELSZ, DT_JMPREL and DT_PLTREL entries if | |
3599 | the procedure linkage table (the .plt section) has been | |
3600 | removed. */ | |
3601 | memmove (extdyn, next, | |
3602 | sdynamic->size - (next - sdynamic->contents)); | |
3603 | next = extdyn; | |
3604 | } | |
3605 | } | |
3606 | ||
3607 | if (strip_zero_sized) | |
3608 | { | |
3609 | /* Regenerate program headers. */ | |
3610 | elf_seg_map (info->output_bfd) = NULL; | |
3611 | return _bfd_elf_map_sections_to_segments (info->output_bfd, info); | |
3612 | } | |
3613 | ||
3614 | return TRUE; | |
3615 | } | |
3616 | ||
e310298c | 3617 | /* Add a DT_NEEDED entry for this dynamic object. Returns -1 on error, |
5a580b3a AM |
3618 | 1 if a DT_NEEDED tag already exists, and 0 on success. */ |
3619 | ||
e310298c AM |
3620 | int |
3621 | bfd_elf_add_dt_needed_tag (bfd *abfd, struct bfd_link_info *info) | |
5a580b3a AM |
3622 | { |
3623 | struct elf_link_hash_table *hash_table; | |
ef53be89 | 3624 | size_t strindex; |
e310298c | 3625 | const char *soname; |
5a580b3a | 3626 | |
7e9f0867 AM |
3627 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
3628 | return -1; | |
3629 | ||
5a580b3a | 3630 | hash_table = elf_hash_table (info); |
e310298c | 3631 | soname = elf_dt_name (abfd); |
5a580b3a | 3632 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, soname, FALSE); |
ef53be89 | 3633 | if (strindex == (size_t) -1) |
5a580b3a AM |
3634 | return -1; |
3635 | ||
02be4619 | 3636 | if (_bfd_elf_strtab_refcount (hash_table->dynstr, strindex) != 1) |
5a580b3a AM |
3637 | { |
3638 | asection *sdyn; | |
3639 | const struct elf_backend_data *bed; | |
3640 | bfd_byte *extdyn; | |
3641 | ||
3642 | bed = get_elf_backend_data (hash_table->dynobj); | |
3d4d4302 | 3643 | sdyn = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
7e9f0867 AM |
3644 | if (sdyn != NULL) |
3645 | for (extdyn = sdyn->contents; | |
3646 | extdyn < sdyn->contents + sdyn->size; | |
3647 | extdyn += bed->s->sizeof_dyn) | |
3648 | { | |
3649 | Elf_Internal_Dyn dyn; | |
5a580b3a | 3650 | |
7e9f0867 AM |
3651 | bed->s->swap_dyn_in (hash_table->dynobj, extdyn, &dyn); |
3652 | if (dyn.d_tag == DT_NEEDED | |
3653 | && dyn.d_un.d_val == strindex) | |
3654 | { | |
3655 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3656 | return 1; | |
3657 | } | |
3658 | } | |
5a580b3a AM |
3659 | } |
3660 | ||
e310298c AM |
3661 | if (!_bfd_elf_link_create_dynamic_sections (hash_table->dynobj, info)) |
3662 | return -1; | |
7e9f0867 | 3663 | |
e310298c AM |
3664 | if (!_bfd_elf_add_dynamic_entry (info, DT_NEEDED, strindex)) |
3665 | return -1; | |
5a580b3a AM |
3666 | |
3667 | return 0; | |
3668 | } | |
3669 | ||
7b15fa7a AM |
3670 | /* Return true if SONAME is on the needed list between NEEDED and STOP |
3671 | (or the end of list if STOP is NULL), and needed by a library that | |
3672 | will be loaded. */ | |
3673 | ||
010e5ae2 | 3674 | static bfd_boolean |
7b15fa7a AM |
3675 | on_needed_list (const char *soname, |
3676 | struct bfd_link_needed_list *needed, | |
3677 | struct bfd_link_needed_list *stop) | |
010e5ae2 | 3678 | { |
7b15fa7a AM |
3679 | struct bfd_link_needed_list *look; |
3680 | for (look = needed; look != stop; look = look->next) | |
3681 | if (strcmp (soname, look->name) == 0 | |
3682 | && ((elf_dyn_lib_class (look->by) & DYN_AS_NEEDED) == 0 | |
3683 | /* If needed by a library that itself is not directly | |
3684 | needed, recursively check whether that library is | |
3685 | indirectly needed. Since we add DT_NEEDED entries to | |
3686 | the end of the list, library dependencies appear after | |
3687 | the library. Therefore search prior to the current | |
3688 | LOOK, preventing possible infinite recursion. */ | |
3689 | || on_needed_list (elf_dt_name (look->by), needed, look))) | |
010e5ae2 AM |
3690 | return TRUE; |
3691 | ||
3692 | return FALSE; | |
3693 | } | |
3694 | ||
3a3f4bf7 | 3695 | /* Sort symbol by value, section, size, and type. */ |
4ad4eba5 AM |
3696 | static int |
3697 | elf_sort_symbol (const void *arg1, const void *arg2) | |
5a580b3a AM |
3698 | { |
3699 | const struct elf_link_hash_entry *h1; | |
3700 | const struct elf_link_hash_entry *h2; | |
10b7e05b | 3701 | bfd_signed_vma vdiff; |
3a3f4bf7 AM |
3702 | int sdiff; |
3703 | const char *n1; | |
3704 | const char *n2; | |
5a580b3a AM |
3705 | |
3706 | h1 = *(const struct elf_link_hash_entry **) arg1; | |
3707 | h2 = *(const struct elf_link_hash_entry **) arg2; | |
10b7e05b NC |
3708 | vdiff = h1->root.u.def.value - h2->root.u.def.value; |
3709 | if (vdiff != 0) | |
3710 | return vdiff > 0 ? 1 : -1; | |
3a3f4bf7 AM |
3711 | |
3712 | sdiff = h1->root.u.def.section->id - h2->root.u.def.section->id; | |
3713 | if (sdiff != 0) | |
3714 | return sdiff; | |
3715 | ||
3716 | /* Sort so that sized symbols are selected over zero size symbols. */ | |
3717 | vdiff = h1->size - h2->size; | |
3718 | if (vdiff != 0) | |
3719 | return vdiff > 0 ? 1 : -1; | |
3720 | ||
3721 | /* Sort so that STT_OBJECT is selected over STT_NOTYPE. */ | |
3722 | if (h1->type != h2->type) | |
3723 | return h1->type - h2->type; | |
3724 | ||
3725 | /* If symbols are properly sized and typed, and multiple strong | |
3726 | aliases are not defined in a shared library by the user we | |
3727 | shouldn't get here. Unfortunately linker script symbols like | |
3728 | __bss_start sometimes match a user symbol defined at the start of | |
3729 | .bss without proper size and type. We'd like to preference the | |
3730 | user symbol over reserved system symbols. Sort on leading | |
3731 | underscores. */ | |
3732 | n1 = h1->root.root.string; | |
3733 | n2 = h2->root.root.string; | |
3734 | while (*n1 == *n2) | |
10b7e05b | 3735 | { |
3a3f4bf7 AM |
3736 | if (*n1 == 0) |
3737 | break; | |
3738 | ++n1; | |
3739 | ++n2; | |
10b7e05b | 3740 | } |
3a3f4bf7 AM |
3741 | if (*n1 == '_') |
3742 | return -1; | |
3743 | if (*n2 == '_') | |
3744 | return 1; | |
3745 | ||
3746 | /* Final sort on name selects user symbols like '_u' over reserved | |
3747 | system symbols like '_Z' and also will avoid qsort instability. */ | |
3748 | return *n1 - *n2; | |
5a580b3a | 3749 | } |
4ad4eba5 | 3750 | |
5a580b3a AM |
3751 | /* This function is used to adjust offsets into .dynstr for |
3752 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
3753 | ||
3754 | static bfd_boolean | |
3755 | elf_adjust_dynstr_offsets (struct elf_link_hash_entry *h, void *data) | |
3756 | { | |
a50b1753 | 3757 | struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data; |
5a580b3a | 3758 | |
5a580b3a AM |
3759 | if (h->dynindx != -1) |
3760 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
3761 | return TRUE; | |
3762 | } | |
3763 | ||
3764 | /* Assign string offsets in .dynstr, update all structures referencing | |
3765 | them. */ | |
3766 | ||
4ad4eba5 AM |
3767 | static bfd_boolean |
3768 | elf_finalize_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
5a580b3a AM |
3769 | { |
3770 | struct elf_link_hash_table *hash_table = elf_hash_table (info); | |
3771 | struct elf_link_local_dynamic_entry *entry; | |
3772 | struct elf_strtab_hash *dynstr = hash_table->dynstr; | |
3773 | bfd *dynobj = hash_table->dynobj; | |
3774 | asection *sdyn; | |
3775 | bfd_size_type size; | |
3776 | const struct elf_backend_data *bed; | |
3777 | bfd_byte *extdyn; | |
3778 | ||
3779 | _bfd_elf_strtab_finalize (dynstr); | |
3780 | size = _bfd_elf_strtab_size (dynstr); | |
3781 | ||
3782 | bed = get_elf_backend_data (dynobj); | |
3d4d4302 | 3783 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
5a580b3a AM |
3784 | BFD_ASSERT (sdyn != NULL); |
3785 | ||
3786 | /* Update all .dynamic entries referencing .dynstr strings. */ | |
3787 | for (extdyn = sdyn->contents; | |
eea6121a | 3788 | extdyn < sdyn->contents + sdyn->size; |
5a580b3a AM |
3789 | extdyn += bed->s->sizeof_dyn) |
3790 | { | |
3791 | Elf_Internal_Dyn dyn; | |
3792 | ||
3793 | bed->s->swap_dyn_in (dynobj, extdyn, &dyn); | |
3794 | switch (dyn.d_tag) | |
3795 | { | |
3796 | case DT_STRSZ: | |
3797 | dyn.d_un.d_val = size; | |
3798 | break; | |
3799 | case DT_NEEDED: | |
3800 | case DT_SONAME: | |
3801 | case DT_RPATH: | |
3802 | case DT_RUNPATH: | |
3803 | case DT_FILTER: | |
3804 | case DT_AUXILIARY: | |
7ee314fa AM |
3805 | case DT_AUDIT: |
3806 | case DT_DEPAUDIT: | |
5a580b3a AM |
3807 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); |
3808 | break; | |
3809 | default: | |
3810 | continue; | |
3811 | } | |
3812 | bed->s->swap_dyn_out (dynobj, &dyn, extdyn); | |
3813 | } | |
3814 | ||
3815 | /* Now update local dynamic symbols. */ | |
3816 | for (entry = hash_table->dynlocal; entry ; entry = entry->next) | |
3817 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
3818 | entry->isym.st_name); | |
3819 | ||
3820 | /* And the rest of dynamic symbols. */ | |
3821 | elf_link_hash_traverse (hash_table, elf_adjust_dynstr_offsets, dynstr); | |
3822 | ||
3823 | /* Adjust version definitions. */ | |
3824 | if (elf_tdata (output_bfd)->cverdefs) | |
3825 | { | |
3826 | asection *s; | |
3827 | bfd_byte *p; | |
ef53be89 | 3828 | size_t i; |
5a580b3a AM |
3829 | Elf_Internal_Verdef def; |
3830 | Elf_Internal_Verdaux defaux; | |
3831 | ||
3d4d4302 | 3832 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); |
5a580b3a AM |
3833 | p = s->contents; |
3834 | do | |
3835 | { | |
3836 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, | |
3837 | &def); | |
3838 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
3839 | if (def.vd_aux != sizeof (Elf_External_Verdef)) |
3840 | continue; | |
5a580b3a AM |
3841 | for (i = 0; i < def.vd_cnt; ++i) |
3842 | { | |
3843 | _bfd_elf_swap_verdaux_in (output_bfd, | |
3844 | (Elf_External_Verdaux *) p, &defaux); | |
3845 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
3846 | defaux.vda_name); | |
3847 | _bfd_elf_swap_verdaux_out (output_bfd, | |
3848 | &defaux, (Elf_External_Verdaux *) p); | |
3849 | p += sizeof (Elf_External_Verdaux); | |
3850 | } | |
3851 | } | |
3852 | while (def.vd_next); | |
3853 | } | |
3854 | ||
3855 | /* Adjust version references. */ | |
3856 | if (elf_tdata (output_bfd)->verref) | |
3857 | { | |
3858 | asection *s; | |
3859 | bfd_byte *p; | |
ef53be89 | 3860 | size_t i; |
5a580b3a AM |
3861 | Elf_Internal_Verneed need; |
3862 | Elf_Internal_Vernaux needaux; | |
3863 | ||
3d4d4302 | 3864 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); |
5a580b3a AM |
3865 | p = s->contents; |
3866 | do | |
3867 | { | |
3868 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, | |
3869 | &need); | |
3870 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
3871 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
3872 | (Elf_External_Verneed *) p); | |
3873 | p += sizeof (Elf_External_Verneed); | |
3874 | for (i = 0; i < need.vn_cnt; ++i) | |
3875 | { | |
3876 | _bfd_elf_swap_vernaux_in (output_bfd, | |
3877 | (Elf_External_Vernaux *) p, &needaux); | |
3878 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
3879 | needaux.vna_name); | |
3880 | _bfd_elf_swap_vernaux_out (output_bfd, | |
3881 | &needaux, | |
3882 | (Elf_External_Vernaux *) p); | |
3883 | p += sizeof (Elf_External_Vernaux); | |
3884 | } | |
3885 | } | |
3886 | while (need.vn_next); | |
3887 | } | |
3888 | ||
3889 | return TRUE; | |
3890 | } | |
3891 | \f | |
13285a1b AM |
3892 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. |
3893 | The default is to only match when the INPUT and OUTPUT are exactly | |
3894 | the same target. */ | |
3895 | ||
3896 | bfd_boolean | |
3897 | _bfd_elf_default_relocs_compatible (const bfd_target *input, | |
3898 | const bfd_target *output) | |
3899 | { | |
3900 | return input == output; | |
3901 | } | |
3902 | ||
3903 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. | |
3904 | This version is used when different targets for the same architecture | |
3905 | are virtually identical. */ | |
3906 | ||
3907 | bfd_boolean | |
3908 | _bfd_elf_relocs_compatible (const bfd_target *input, | |
3909 | const bfd_target *output) | |
3910 | { | |
3911 | const struct elf_backend_data *obed, *ibed; | |
3912 | ||
3913 | if (input == output) | |
3914 | return TRUE; | |
3915 | ||
3916 | ibed = xvec_get_elf_backend_data (input); | |
3917 | obed = xvec_get_elf_backend_data (output); | |
3918 | ||
3919 | if (ibed->arch != obed->arch) | |
3920 | return FALSE; | |
3921 | ||
3922 | /* If both backends are using this function, deem them compatible. */ | |
3923 | return ibed->relocs_compatible == obed->relocs_compatible; | |
3924 | } | |
3925 | ||
e5034e59 AM |
3926 | /* Make a special call to the linker "notice" function to tell it that |
3927 | we are about to handle an as-needed lib, or have finished | |
1b786873 | 3928 | processing the lib. */ |
e5034e59 AM |
3929 | |
3930 | bfd_boolean | |
3931 | _bfd_elf_notice_as_needed (bfd *ibfd, | |
3932 | struct bfd_link_info *info, | |
3933 | enum notice_asneeded_action act) | |
3934 | { | |
46135103 | 3935 | return (*info->callbacks->notice) (info, NULL, NULL, ibfd, NULL, act, 0); |
e5034e59 AM |
3936 | } |
3937 | ||
d9689752 L |
3938 | /* Check relocations an ELF object file. */ |
3939 | ||
3940 | bfd_boolean | |
3941 | _bfd_elf_link_check_relocs (bfd *abfd, struct bfd_link_info *info) | |
3942 | { | |
3943 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3944 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
3945 | ||
3946 | /* If this object is the same format as the output object, and it is | |
3947 | not a shared library, then let the backend look through the | |
3948 | relocs. | |
3949 | ||
3950 | This is required to build global offset table entries and to | |
3951 | arrange for dynamic relocs. It is not required for the | |
3952 | particular common case of linking non PIC code, even when linking | |
3953 | against shared libraries, but unfortunately there is no way of | |
3954 | knowing whether an object file has been compiled PIC or not. | |
3955 | Looking through the relocs is not particularly time consuming. | |
3956 | The problem is that we must either (1) keep the relocs in memory, | |
3957 | which causes the linker to require additional runtime memory or | |
3958 | (2) read the relocs twice from the input file, which wastes time. | |
3959 | This would be a good case for using mmap. | |
3960 | ||
3961 | I have no idea how to handle linking PIC code into a file of a | |
3962 | different format. It probably can't be done. */ | |
3963 | if ((abfd->flags & DYNAMIC) == 0 | |
3964 | && is_elf_hash_table (htab) | |
3965 | && bed->check_relocs != NULL | |
3966 | && elf_object_id (abfd) == elf_hash_table_id (htab) | |
3967 | && (*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) | |
3968 | { | |
3969 | asection *o; | |
3970 | ||
3971 | for (o = abfd->sections; o != NULL; o = o->next) | |
3972 | { | |
3973 | Elf_Internal_Rela *internal_relocs; | |
3974 | bfd_boolean ok; | |
3975 | ||
c4b126b8 L |
3976 | /* Don't check relocations in excluded sections. Don't do |
3977 | anything special with non-loaded, non-alloced sections. | |
3978 | In particular, any relocs in such sections should not | |
3979 | affect GOT and PLT reference counting (ie. we don't | |
3980 | allow them to create GOT or PLT entries), there's no | |
3981 | possibility or desire to optimize TLS relocs, and | |
3982 | there's not much point in propagating relocs to shared | |
3983 | libs that the dynamic linker won't relocate. */ | |
3984 | if ((o->flags & SEC_ALLOC) == 0 | |
3985 | || (o->flags & SEC_RELOC) == 0 | |
5ce03cea | 3986 | || (o->flags & SEC_EXCLUDE) != 0 |
d9689752 L |
3987 | || o->reloc_count == 0 |
3988 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
3989 | && (o->flags & SEC_DEBUGGING) != 0) | |
3990 | || bfd_is_abs_section (o->output_section)) | |
3991 | continue; | |
3992 | ||
3993 | internal_relocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, | |
3994 | info->keep_memory); | |
3995 | if (internal_relocs == NULL) | |
3996 | return FALSE; | |
3997 | ||
3998 | ok = (*bed->check_relocs) (abfd, info, o, internal_relocs); | |
3999 | ||
4000 | if (elf_section_data (o)->relocs != internal_relocs) | |
4001 | free (internal_relocs); | |
4002 | ||
4003 | if (! ok) | |
4004 | return FALSE; | |
4005 | } | |
4006 | } | |
4007 | ||
4008 | return TRUE; | |
4009 | } | |
4010 | ||
4ad4eba5 AM |
4011 | /* Add symbols from an ELF object file to the linker hash table. */ |
4012 | ||
4013 | static bfd_boolean | |
4014 | elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) | |
4015 | { | |
a0c402a5 | 4016 | Elf_Internal_Ehdr *ehdr; |
4ad4eba5 | 4017 | Elf_Internal_Shdr *hdr; |
ef53be89 AM |
4018 | size_t symcount; |
4019 | size_t extsymcount; | |
4020 | size_t extsymoff; | |
4ad4eba5 AM |
4021 | struct elf_link_hash_entry **sym_hash; |
4022 | bfd_boolean dynamic; | |
4023 | Elf_External_Versym *extversym = NULL; | |
be22c732 | 4024 | Elf_External_Versym *extversym_end = NULL; |
4ad4eba5 AM |
4025 | Elf_External_Versym *ever; |
4026 | struct elf_link_hash_entry *weaks; | |
4027 | struct elf_link_hash_entry **nondeflt_vers = NULL; | |
ef53be89 | 4028 | size_t nondeflt_vers_cnt = 0; |
4ad4eba5 AM |
4029 | Elf_Internal_Sym *isymbuf = NULL; |
4030 | Elf_Internal_Sym *isym; | |
4031 | Elf_Internal_Sym *isymend; | |
4032 | const struct elf_backend_data *bed; | |
4033 | bfd_boolean add_needed; | |
66eb6687 | 4034 | struct elf_link_hash_table *htab; |
66eb6687 | 4035 | void *alloc_mark = NULL; |
4f87808c AM |
4036 | struct bfd_hash_entry **old_table = NULL; |
4037 | unsigned int old_size = 0; | |
4038 | unsigned int old_count = 0; | |
66eb6687 | 4039 | void *old_tab = NULL; |
66eb6687 AM |
4040 | void *old_ent; |
4041 | struct bfd_link_hash_entry *old_undefs = NULL; | |
4042 | struct bfd_link_hash_entry *old_undefs_tail = NULL; | |
5b677558 | 4043 | void *old_strtab = NULL; |
66eb6687 | 4044 | size_t tabsize = 0; |
db6a5d5f | 4045 | asection *s; |
29a9f53e | 4046 | bfd_boolean just_syms; |
4ad4eba5 | 4047 | |
66eb6687 | 4048 | htab = elf_hash_table (info); |
4ad4eba5 | 4049 | bed = get_elf_backend_data (abfd); |
4ad4eba5 AM |
4050 | |
4051 | if ((abfd->flags & DYNAMIC) == 0) | |
4052 | dynamic = FALSE; | |
4053 | else | |
4054 | { | |
4055 | dynamic = TRUE; | |
4056 | ||
4057 | /* You can't use -r against a dynamic object. Also, there's no | |
4058 | hope of using a dynamic object which does not exactly match | |
4059 | the format of the output file. */ | |
0e1862bb | 4060 | if (bfd_link_relocatable (info) |
66eb6687 | 4061 | || !is_elf_hash_table (htab) |
f13a99db | 4062 | || info->output_bfd->xvec != abfd->xvec) |
4ad4eba5 | 4063 | { |
0e1862bb | 4064 | if (bfd_link_relocatable (info)) |
9a0789ec NC |
4065 | bfd_set_error (bfd_error_invalid_operation); |
4066 | else | |
4067 | bfd_set_error (bfd_error_wrong_format); | |
4ad4eba5 AM |
4068 | goto error_return; |
4069 | } | |
4070 | } | |
4071 | ||
a0c402a5 L |
4072 | ehdr = elf_elfheader (abfd); |
4073 | if (info->warn_alternate_em | |
4074 | && bed->elf_machine_code != ehdr->e_machine | |
4075 | && ((bed->elf_machine_alt1 != 0 | |
4076 | && ehdr->e_machine == bed->elf_machine_alt1) | |
4077 | || (bed->elf_machine_alt2 != 0 | |
4078 | && ehdr->e_machine == bed->elf_machine_alt2))) | |
9793eb77 | 4079 | _bfd_error_handler |
695344c0 | 4080 | /* xgettext:c-format */ |
9793eb77 | 4081 | (_("alternate ELF machine code found (%d) in %pB, expecting %d"), |
a0c402a5 L |
4082 | ehdr->e_machine, abfd, bed->elf_machine_code); |
4083 | ||
4ad4eba5 AM |
4084 | /* As a GNU extension, any input sections which are named |
4085 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
4086 | symbol. This differs from .gnu.warning sections, which generate | |
4087 | warnings when they are included in an output file. */ | |
dd98f8d2 | 4088 | /* PR 12761: Also generate this warning when building shared libraries. */ |
db6a5d5f | 4089 | for (s = abfd->sections; s != NULL; s = s->next) |
4ad4eba5 | 4090 | { |
db6a5d5f | 4091 | const char *name; |
4ad4eba5 | 4092 | |
fd361982 | 4093 | name = bfd_section_name (s); |
db6a5d5f | 4094 | if (CONST_STRNEQ (name, ".gnu.warning.")) |
4ad4eba5 | 4095 | { |
db6a5d5f AM |
4096 | char *msg; |
4097 | bfd_size_type sz; | |
4098 | ||
4099 | name += sizeof ".gnu.warning." - 1; | |
4100 | ||
4101 | /* If this is a shared object, then look up the symbol | |
4102 | in the hash table. If it is there, and it is already | |
4103 | been defined, then we will not be using the entry | |
4104 | from this shared object, so we don't need to warn. | |
4105 | FIXME: If we see the definition in a regular object | |
4106 | later on, we will warn, but we shouldn't. The only | |
4107 | fix is to keep track of what warnings we are supposed | |
4108 | to emit, and then handle them all at the end of the | |
4109 | link. */ | |
4110 | if (dynamic) | |
4ad4eba5 | 4111 | { |
db6a5d5f AM |
4112 | struct elf_link_hash_entry *h; |
4113 | ||
4114 | h = elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE); | |
4115 | ||
4116 | /* FIXME: What about bfd_link_hash_common? */ | |
4117 | if (h != NULL | |
4118 | && (h->root.type == bfd_link_hash_defined | |
4119 | || h->root.type == bfd_link_hash_defweak)) | |
4120 | continue; | |
4121 | } | |
4ad4eba5 | 4122 | |
db6a5d5f AM |
4123 | sz = s->size; |
4124 | msg = (char *) bfd_alloc (abfd, sz + 1); | |
4125 | if (msg == NULL) | |
4126 | goto error_return; | |
4ad4eba5 | 4127 | |
db6a5d5f AM |
4128 | if (! bfd_get_section_contents (abfd, s, msg, 0, sz)) |
4129 | goto error_return; | |
4ad4eba5 | 4130 | |
db6a5d5f | 4131 | msg[sz] = '\0'; |
4ad4eba5 | 4132 | |
db6a5d5f AM |
4133 | if (! (_bfd_generic_link_add_one_symbol |
4134 | (info, abfd, name, BSF_WARNING, s, 0, msg, | |
4135 | FALSE, bed->collect, NULL))) | |
4136 | goto error_return; | |
4ad4eba5 | 4137 | |
0e1862bb | 4138 | if (bfd_link_executable (info)) |
db6a5d5f AM |
4139 | { |
4140 | /* Clobber the section size so that the warning does | |
4141 | not get copied into the output file. */ | |
4142 | s->size = 0; | |
11d2f718 | 4143 | |
db6a5d5f AM |
4144 | /* Also set SEC_EXCLUDE, so that symbols defined in |
4145 | the warning section don't get copied to the output. */ | |
4146 | s->flags |= SEC_EXCLUDE; | |
4ad4eba5 AM |
4147 | } |
4148 | } | |
4149 | } | |
4150 | ||
29a9f53e L |
4151 | just_syms = ((s = abfd->sections) != NULL |
4152 | && s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS); | |
4153 | ||
4ad4eba5 AM |
4154 | add_needed = TRUE; |
4155 | if (! dynamic) | |
4156 | { | |
4157 | /* If we are creating a shared library, create all the dynamic | |
4158 | sections immediately. We need to attach them to something, | |
4159 | so we attach them to this BFD, provided it is the right | |
bf89386a L |
4160 | format and is not from ld --just-symbols. Always create the |
4161 | dynamic sections for -E/--dynamic-list. FIXME: If there | |
29a9f53e L |
4162 | are no input BFD's of the same format as the output, we can't |
4163 | make a shared library. */ | |
4164 | if (!just_syms | |
bf89386a | 4165 | && (bfd_link_pic (info) |
9c1d7a08 | 4166 | || (!bfd_link_relocatable (info) |
3c5fce9b | 4167 | && info->nointerp |
9c1d7a08 | 4168 | && (info->export_dynamic || info->dynamic))) |
66eb6687 | 4169 | && is_elf_hash_table (htab) |
f13a99db | 4170 | && info->output_bfd->xvec == abfd->xvec |
66eb6687 | 4171 | && !htab->dynamic_sections_created) |
4ad4eba5 AM |
4172 | { |
4173 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
4174 | goto error_return; | |
4175 | } | |
4176 | } | |
66eb6687 | 4177 | else if (!is_elf_hash_table (htab)) |
4ad4eba5 AM |
4178 | goto error_return; |
4179 | else | |
4180 | { | |
4ad4eba5 | 4181 | const char *soname = NULL; |
7ee314fa | 4182 | char *audit = NULL; |
4ad4eba5 | 4183 | struct bfd_link_needed_list *rpath = NULL, *runpath = NULL; |
9acc85a6 | 4184 | const Elf_Internal_Phdr *phdr; |
e310298c | 4185 | struct elf_link_loaded_list *loaded_lib; |
4ad4eba5 AM |
4186 | |
4187 | /* ld --just-symbols and dynamic objects don't mix very well. | |
92fd189d | 4188 | ld shouldn't allow it. */ |
29a9f53e | 4189 | if (just_syms) |
92fd189d | 4190 | abort (); |
4ad4eba5 AM |
4191 | |
4192 | /* If this dynamic lib was specified on the command line with | |
4193 | --as-needed in effect, then we don't want to add a DT_NEEDED | |
4194 | tag unless the lib is actually used. Similary for libs brought | |
e56f61be L |
4195 | in by another lib's DT_NEEDED. When --no-add-needed is used |
4196 | on a dynamic lib, we don't want to add a DT_NEEDED entry for | |
4197 | any dynamic library in DT_NEEDED tags in the dynamic lib at | |
4198 | all. */ | |
4199 | add_needed = (elf_dyn_lib_class (abfd) | |
4200 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | |
4201 | | DYN_NO_NEEDED)) == 0; | |
4ad4eba5 AM |
4202 | |
4203 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
4204 | if (s != NULL) | |
4205 | { | |
4206 | bfd_byte *dynbuf; | |
4207 | bfd_byte *extdyn; | |
cb33740c | 4208 | unsigned int elfsec; |
4ad4eba5 AM |
4209 | unsigned long shlink; |
4210 | ||
eea6121a | 4211 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) |
f8703194 | 4212 | { |
dc1e8a47 | 4213 | error_free_dyn: |
f8703194 L |
4214 | free (dynbuf); |
4215 | goto error_return; | |
4216 | } | |
4ad4eba5 AM |
4217 | |
4218 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 4219 | if (elfsec == SHN_BAD) |
4ad4eba5 AM |
4220 | goto error_free_dyn; |
4221 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
4222 | ||
4223 | for (extdyn = dynbuf; | |
9bff840e | 4224 | extdyn <= dynbuf + s->size - bed->s->sizeof_dyn; |
4ad4eba5 AM |
4225 | extdyn += bed->s->sizeof_dyn) |
4226 | { | |
4227 | Elf_Internal_Dyn dyn; | |
4228 | ||
4229 | bed->s->swap_dyn_in (abfd, extdyn, &dyn); | |
4230 | if (dyn.d_tag == DT_SONAME) | |
4231 | { | |
4232 | unsigned int tagv = dyn.d_un.d_val; | |
4233 | soname = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
4234 | if (soname == NULL) | |
4235 | goto error_free_dyn; | |
4236 | } | |
4237 | if (dyn.d_tag == DT_NEEDED) | |
4238 | { | |
4239 | struct bfd_link_needed_list *n, **pn; | |
4240 | char *fnm, *anm; | |
4241 | unsigned int tagv = dyn.d_un.d_val; | |
986f0783 | 4242 | size_t amt = sizeof (struct bfd_link_needed_list); |
4ad4eba5 | 4243 | |
a50b1753 | 4244 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4245 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
4246 | if (n == NULL || fnm == NULL) | |
4247 | goto error_free_dyn; | |
4248 | amt = strlen (fnm) + 1; | |
a50b1753 | 4249 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4250 | if (anm == NULL) |
4251 | goto error_free_dyn; | |
4252 | memcpy (anm, fnm, amt); | |
4253 | n->name = anm; | |
4254 | n->by = abfd; | |
4255 | n->next = NULL; | |
66eb6687 | 4256 | for (pn = &htab->needed; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
4257 | ; |
4258 | *pn = n; | |
4259 | } | |
4260 | if (dyn.d_tag == DT_RUNPATH) | |
4261 | { | |
4262 | struct bfd_link_needed_list *n, **pn; | |
4263 | char *fnm, *anm; | |
4264 | unsigned int tagv = dyn.d_un.d_val; | |
986f0783 | 4265 | size_t amt = sizeof (struct bfd_link_needed_list); |
4ad4eba5 | 4266 | |
a50b1753 | 4267 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4268 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
4269 | if (n == NULL || fnm == NULL) | |
4270 | goto error_free_dyn; | |
4271 | amt = strlen (fnm) + 1; | |
a50b1753 | 4272 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4273 | if (anm == NULL) |
4274 | goto error_free_dyn; | |
4275 | memcpy (anm, fnm, amt); | |
4276 | n->name = anm; | |
4277 | n->by = abfd; | |
4278 | n->next = NULL; | |
4279 | for (pn = & runpath; | |
4280 | *pn != NULL; | |
4281 | pn = &(*pn)->next) | |
4282 | ; | |
4283 | *pn = n; | |
4284 | } | |
4285 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ | |
4286 | if (!runpath && dyn.d_tag == DT_RPATH) | |
4287 | { | |
4288 | struct bfd_link_needed_list *n, **pn; | |
4289 | char *fnm, *anm; | |
4290 | unsigned int tagv = dyn.d_un.d_val; | |
986f0783 | 4291 | size_t amt = sizeof (struct bfd_link_needed_list); |
4ad4eba5 | 4292 | |
a50b1753 | 4293 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4294 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
4295 | if (n == NULL || fnm == NULL) | |
4296 | goto error_free_dyn; | |
4297 | amt = strlen (fnm) + 1; | |
a50b1753 | 4298 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 | 4299 | if (anm == NULL) |
f8703194 | 4300 | goto error_free_dyn; |
4ad4eba5 AM |
4301 | memcpy (anm, fnm, amt); |
4302 | n->name = anm; | |
4303 | n->by = abfd; | |
4304 | n->next = NULL; | |
4305 | for (pn = & rpath; | |
4306 | *pn != NULL; | |
4307 | pn = &(*pn)->next) | |
4308 | ; | |
4309 | *pn = n; | |
4310 | } | |
7ee314fa AM |
4311 | if (dyn.d_tag == DT_AUDIT) |
4312 | { | |
4313 | unsigned int tagv = dyn.d_un.d_val; | |
4314 | audit = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
4315 | } | |
4ad4eba5 AM |
4316 | } |
4317 | ||
4318 | free (dynbuf); | |
4319 | } | |
4320 | ||
4321 | /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that | |
4322 | frees all more recently bfd_alloc'd blocks as well. */ | |
4323 | if (runpath) | |
4324 | rpath = runpath; | |
4325 | ||
4326 | if (rpath) | |
4327 | { | |
4328 | struct bfd_link_needed_list **pn; | |
66eb6687 | 4329 | for (pn = &htab->runpath; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
4330 | ; |
4331 | *pn = rpath; | |
4332 | } | |
4333 | ||
9acc85a6 AM |
4334 | /* If we have a PT_GNU_RELRO program header, mark as read-only |
4335 | all sections contained fully therein. This makes relro | |
4336 | shared library sections appear as they will at run-time. */ | |
4337 | phdr = elf_tdata (abfd)->phdr + elf_elfheader (abfd)->e_phnum; | |
54025d58 | 4338 | while (phdr-- > elf_tdata (abfd)->phdr) |
9acc85a6 AM |
4339 | if (phdr->p_type == PT_GNU_RELRO) |
4340 | { | |
4341 | for (s = abfd->sections; s != NULL; s = s->next) | |
502794d4 CE |
4342 | { |
4343 | unsigned int opb = bfd_octets_per_byte (abfd, s); | |
4344 | ||
4345 | if ((s->flags & SEC_ALLOC) != 0 | |
4346 | && s->vma * opb >= phdr->p_vaddr | |
4347 | && s->vma * opb + s->size <= phdr->p_vaddr + phdr->p_memsz) | |
4348 | s->flags |= SEC_READONLY; | |
4349 | } | |
9acc85a6 AM |
4350 | break; |
4351 | } | |
4352 | ||
4ad4eba5 AM |
4353 | /* We do not want to include any of the sections in a dynamic |
4354 | object in the output file. We hack by simply clobbering the | |
4355 | list of sections in the BFD. This could be handled more | |
4356 | cleanly by, say, a new section flag; the existing | |
4357 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
4358 | still implies that the section takes up space in the output | |
4359 | file. */ | |
4360 | bfd_section_list_clear (abfd); | |
4361 | ||
4ad4eba5 AM |
4362 | /* Find the name to use in a DT_NEEDED entry that refers to this |
4363 | object. If the object has a DT_SONAME entry, we use it. | |
4364 | Otherwise, if the generic linker stuck something in | |
4365 | elf_dt_name, we use that. Otherwise, we just use the file | |
4366 | name. */ | |
4367 | if (soname == NULL || *soname == '\0') | |
4368 | { | |
4369 | soname = elf_dt_name (abfd); | |
4370 | if (soname == NULL || *soname == '\0') | |
4371 | soname = bfd_get_filename (abfd); | |
4372 | } | |
4373 | ||
4374 | /* Save the SONAME because sometimes the linker emulation code | |
4375 | will need to know it. */ | |
4376 | elf_dt_name (abfd) = soname; | |
4377 | ||
4ad4eba5 AM |
4378 | /* If we have already included this dynamic object in the |
4379 | link, just ignore it. There is no reason to include a | |
4380 | particular dynamic object more than once. */ | |
e310298c AM |
4381 | for (loaded_lib = htab->dyn_loaded; |
4382 | loaded_lib != NULL; | |
4383 | loaded_lib = loaded_lib->next) | |
4384 | { | |
4385 | if (strcmp (elf_dt_name (loaded_lib->abfd), soname) == 0) | |
4386 | return TRUE; | |
4387 | } | |
4388 | ||
4389 | /* Create dynamic sections for backends that require that be done | |
4390 | before setup_gnu_properties. */ | |
4391 | if (add_needed | |
4392 | && !_bfd_elf_link_create_dynamic_sections (abfd, info)) | |
4393 | return FALSE; | |
7ee314fa AM |
4394 | |
4395 | /* Save the DT_AUDIT entry for the linker emulation code. */ | |
68ffbac6 | 4396 | elf_dt_audit (abfd) = audit; |
4ad4eba5 AM |
4397 | } |
4398 | ||
4399 | /* If this is a dynamic object, we always link against the .dynsym | |
4400 | symbol table, not the .symtab symbol table. The dynamic linker | |
4401 | will only see the .dynsym symbol table, so there is no reason to | |
4402 | look at .symtab for a dynamic object. */ | |
4403 | ||
4404 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
4405 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
4406 | else | |
4407 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
4408 | ||
4409 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
4410 | ||
4411 | /* The sh_info field of the symtab header tells us where the | |
4412 | external symbols start. We don't care about the local symbols at | |
4413 | this point. */ | |
4414 | if (elf_bad_symtab (abfd)) | |
4415 | { | |
4416 | extsymcount = symcount; | |
4417 | extsymoff = 0; | |
4418 | } | |
4419 | else | |
4420 | { | |
4421 | extsymcount = symcount - hdr->sh_info; | |
4422 | extsymoff = hdr->sh_info; | |
4423 | } | |
4424 | ||
f45794cb | 4425 | sym_hash = elf_sym_hashes (abfd); |
012b2306 | 4426 | if (extsymcount != 0) |
4ad4eba5 AM |
4427 | { |
4428 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
4429 | NULL, NULL, NULL); | |
4430 | if (isymbuf == NULL) | |
4431 | goto error_return; | |
4432 | ||
4ad4eba5 | 4433 | if (sym_hash == NULL) |
012b2306 AM |
4434 | { |
4435 | /* We store a pointer to the hash table entry for each | |
4436 | external symbol. */ | |
986f0783 | 4437 | size_t amt = extsymcount * sizeof (struct elf_link_hash_entry *); |
012b2306 AM |
4438 | sym_hash = (struct elf_link_hash_entry **) bfd_zalloc (abfd, amt); |
4439 | if (sym_hash == NULL) | |
4440 | goto error_free_sym; | |
4441 | elf_sym_hashes (abfd) = sym_hash; | |
4442 | } | |
4ad4eba5 AM |
4443 | } |
4444 | ||
4445 | if (dynamic) | |
4446 | { | |
4447 | /* Read in any version definitions. */ | |
fc0e6df6 PB |
4448 | if (!_bfd_elf_slurp_version_tables (abfd, |
4449 | info->default_imported_symver)) | |
4ad4eba5 AM |
4450 | goto error_free_sym; |
4451 | ||
4452 | /* Read in the symbol versions, but don't bother to convert them | |
4453 | to internal format. */ | |
4454 | if (elf_dynversym (abfd) != 0) | |
4455 | { | |
986f0783 AM |
4456 | Elf_Internal_Shdr *versymhdr = &elf_tdata (abfd)->dynversym_hdr; |
4457 | bfd_size_type amt = versymhdr->sh_size; | |
4ad4eba5 | 4458 | |
2bb3687b AM |
4459 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0) |
4460 | goto error_free_sym; | |
4461 | extversym = (Elf_External_Versym *) | |
4462 | _bfd_malloc_and_read (abfd, amt, amt); | |
4ad4eba5 AM |
4463 | if (extversym == NULL) |
4464 | goto error_free_sym; | |
986f0783 | 4465 | extversym_end = extversym + amt / sizeof (*extversym); |
4ad4eba5 AM |
4466 | } |
4467 | } | |
4468 | ||
66eb6687 AM |
4469 | /* If we are loading an as-needed shared lib, save the symbol table |
4470 | state before we start adding symbols. If the lib turns out | |
4471 | to be unneeded, restore the state. */ | |
4472 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
4473 | { | |
4474 | unsigned int i; | |
4475 | size_t entsize; | |
4476 | ||
4477 | for (entsize = 0, i = 0; i < htab->root.table.size; i++) | |
4478 | { | |
4479 | struct bfd_hash_entry *p; | |
2de92251 | 4480 | struct elf_link_hash_entry *h; |
66eb6687 AM |
4481 | |
4482 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
2de92251 AM |
4483 | { |
4484 | h = (struct elf_link_hash_entry *) p; | |
4485 | entsize += htab->root.table.entsize; | |
4486 | if (h->root.type == bfd_link_hash_warning) | |
7ba11550 AM |
4487 | { |
4488 | entsize += htab->root.table.entsize; | |
4489 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4490 | } | |
4491 | if (h->root.type == bfd_link_hash_common) | |
4492 | entsize += sizeof (*h->root.u.c.p); | |
2de92251 | 4493 | } |
66eb6687 AM |
4494 | } |
4495 | ||
4496 | tabsize = htab->root.table.size * sizeof (struct bfd_hash_entry *); | |
f45794cb | 4497 | old_tab = bfd_malloc (tabsize + entsize); |
66eb6687 AM |
4498 | if (old_tab == NULL) |
4499 | goto error_free_vers; | |
4500 | ||
4501 | /* Remember the current objalloc pointer, so that all mem for | |
4502 | symbols added can later be reclaimed. */ | |
4503 | alloc_mark = bfd_hash_allocate (&htab->root.table, 1); | |
4504 | if (alloc_mark == NULL) | |
4505 | goto error_free_vers; | |
4506 | ||
5061a885 AM |
4507 | /* Make a special call to the linker "notice" function to |
4508 | tell it that we are about to handle an as-needed lib. */ | |
e5034e59 | 4509 | if (!(*bed->notice_as_needed) (abfd, info, notice_as_needed)) |
9af2a943 | 4510 | goto error_free_vers; |
5061a885 | 4511 | |
f45794cb AM |
4512 | /* Clone the symbol table. Remember some pointers into the |
4513 | symbol table, and dynamic symbol count. */ | |
4514 | old_ent = (char *) old_tab + tabsize; | |
66eb6687 | 4515 | memcpy (old_tab, htab->root.table.table, tabsize); |
66eb6687 AM |
4516 | old_undefs = htab->root.undefs; |
4517 | old_undefs_tail = htab->root.undefs_tail; | |
4f87808c AM |
4518 | old_table = htab->root.table.table; |
4519 | old_size = htab->root.table.size; | |
4520 | old_count = htab->root.table.count; | |
e310298c AM |
4521 | old_strtab = NULL; |
4522 | if (htab->dynstr != NULL) | |
4523 | { | |
4524 | old_strtab = _bfd_elf_strtab_save (htab->dynstr); | |
4525 | if (old_strtab == NULL) | |
4526 | goto error_free_vers; | |
4527 | } | |
66eb6687 AM |
4528 | |
4529 | for (i = 0; i < htab->root.table.size; i++) | |
4530 | { | |
4531 | struct bfd_hash_entry *p; | |
2de92251 | 4532 | struct elf_link_hash_entry *h; |
66eb6687 AM |
4533 | |
4534 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
4535 | { | |
2de92251 | 4536 | h = (struct elf_link_hash_entry *) p; |
7ba11550 AM |
4537 | memcpy (old_ent, h, htab->root.table.entsize); |
4538 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
4539 | if (h->root.type == bfd_link_hash_warning) |
4540 | { | |
7ba11550 AM |
4541 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
4542 | memcpy (old_ent, h, htab->root.table.entsize); | |
2de92251 AM |
4543 | old_ent = (char *) old_ent + htab->root.table.entsize; |
4544 | } | |
7ba11550 AM |
4545 | if (h->root.type == bfd_link_hash_common) |
4546 | { | |
4547 | memcpy (old_ent, h->root.u.c.p, sizeof (*h->root.u.c.p)); | |
4548 | old_ent = (char *) old_ent + sizeof (*h->root.u.c.p); | |
4549 | } | |
66eb6687 AM |
4550 | } |
4551 | } | |
4552 | } | |
4ad4eba5 | 4553 | |
66eb6687 | 4554 | weaks = NULL; |
be22c732 NC |
4555 | if (extversym == NULL) |
4556 | ever = NULL; | |
4557 | else if (extversym + extsymoff < extversym_end) | |
4558 | ever = extversym + extsymoff; | |
4559 | else | |
4560 | { | |
4561 | /* xgettext:c-format */ | |
4562 | _bfd_error_handler (_("%pB: invalid version offset %lx (max %lx)"), | |
4563 | abfd, (long) extsymoff, | |
4564 | (long) (extversym_end - extversym) / sizeof (* extversym)); | |
4565 | bfd_set_error (bfd_error_bad_value); | |
4566 | goto error_free_vers; | |
4567 | } | |
4568 | ||
b4c555cf ML |
4569 | if (!bfd_link_relocatable (info) |
4570 | && abfd->lto_slim_object) | |
cc5277b1 ML |
4571 | { |
4572 | _bfd_error_handler | |
4573 | (_("%pB: plugin needed to handle lto object"), abfd); | |
4574 | } | |
4575 | ||
4ad4eba5 AM |
4576 | for (isym = isymbuf, isymend = isymbuf + extsymcount; |
4577 | isym < isymend; | |
4578 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
4579 | { | |
4580 | int bind; | |
4581 | bfd_vma value; | |
af44c138 | 4582 | asection *sec, *new_sec; |
4ad4eba5 AM |
4583 | flagword flags; |
4584 | const char *name; | |
4585 | struct elf_link_hash_entry *h; | |
90c984fc | 4586 | struct elf_link_hash_entry *hi; |
4ad4eba5 AM |
4587 | bfd_boolean definition; |
4588 | bfd_boolean size_change_ok; | |
4589 | bfd_boolean type_change_ok; | |
37a9e49a L |
4590 | bfd_boolean new_weak; |
4591 | bfd_boolean old_weak; | |
7ba11550 | 4592 | bfd *override; |
a4d8e49b | 4593 | bfd_boolean common; |
97196564 | 4594 | bfd_boolean discarded; |
4ad4eba5 | 4595 | unsigned int old_alignment; |
4538d1c7 | 4596 | unsigned int shindex; |
4ad4eba5 | 4597 | bfd *old_bfd; |
6e33951e | 4598 | bfd_boolean matched; |
4ad4eba5 | 4599 | |
7ba11550 | 4600 | override = NULL; |
4ad4eba5 AM |
4601 | |
4602 | flags = BSF_NO_FLAGS; | |
4603 | sec = NULL; | |
4604 | value = isym->st_value; | |
a4d8e49b | 4605 | common = bed->common_definition (isym); |
2980ccad L |
4606 | if (common && info->inhibit_common_definition) |
4607 | { | |
4608 | /* Treat common symbol as undefined for --no-define-common. */ | |
4609 | isym->st_shndx = SHN_UNDEF; | |
4610 | common = FALSE; | |
4611 | } | |
97196564 | 4612 | discarded = FALSE; |
4ad4eba5 AM |
4613 | |
4614 | bind = ELF_ST_BIND (isym->st_info); | |
3e7a7d11 | 4615 | switch (bind) |
4ad4eba5 | 4616 | { |
3e7a7d11 | 4617 | case STB_LOCAL: |
4ad4eba5 AM |
4618 | /* This should be impossible, since ELF requires that all |
4619 | global symbols follow all local symbols, and that sh_info | |
4620 | point to the first global symbol. Unfortunately, Irix 5 | |
4621 | screws this up. */ | |
fe3fef62 AM |
4622 | if (elf_bad_symtab (abfd)) |
4623 | continue; | |
4624 | ||
4625 | /* If we aren't prepared to handle locals within the globals | |
4538d1c7 AM |
4626 | then we'll likely segfault on a NULL symbol hash if the |
4627 | symbol is ever referenced in relocations. */ | |
4628 | shindex = elf_elfheader (abfd)->e_shstrndx; | |
4629 | name = bfd_elf_string_from_elf_section (abfd, shindex, hdr->sh_name); | |
4630 | _bfd_error_handler (_("%pB: %s local symbol at index %lu" | |
4631 | " (>= sh_info of %lu)"), | |
4632 | abfd, name, (long) (isym - isymbuf + extsymoff), | |
4633 | (long) extsymoff); | |
4634 | ||
4635 | /* Dynamic object relocations are not processed by ld, so | |
4636 | ld won't run into the problem mentioned above. */ | |
4637 | if (dynamic) | |
4638 | continue; | |
fe3fef62 AM |
4639 | bfd_set_error (bfd_error_bad_value); |
4640 | goto error_free_vers; | |
3e7a7d11 NC |
4641 | |
4642 | case STB_GLOBAL: | |
a4d8e49b | 4643 | if (isym->st_shndx != SHN_UNDEF && !common) |
4ad4eba5 | 4644 | flags = BSF_GLOBAL; |
3e7a7d11 NC |
4645 | break; |
4646 | ||
4647 | case STB_WEAK: | |
4648 | flags = BSF_WEAK; | |
4649 | break; | |
4650 | ||
4651 | case STB_GNU_UNIQUE: | |
4652 | flags = BSF_GNU_UNIQUE; | |
4653 | break; | |
4654 | ||
4655 | default: | |
4ad4eba5 | 4656 | /* Leave it up to the processor backend. */ |
3e7a7d11 | 4657 | break; |
4ad4eba5 AM |
4658 | } |
4659 | ||
4660 | if (isym->st_shndx == SHN_UNDEF) | |
4661 | sec = bfd_und_section_ptr; | |
cb33740c AM |
4662 | else if (isym->st_shndx == SHN_ABS) |
4663 | sec = bfd_abs_section_ptr; | |
4664 | else if (isym->st_shndx == SHN_COMMON) | |
4665 | { | |
4666 | sec = bfd_com_section_ptr; | |
4667 | /* What ELF calls the size we call the value. What ELF | |
4668 | calls the value we call the alignment. */ | |
4669 | value = isym->st_size; | |
4670 | } | |
4671 | else | |
4ad4eba5 AM |
4672 | { |
4673 | sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
4674 | if (sec == NULL) | |
4675 | sec = bfd_abs_section_ptr; | |
dbaa2011 | 4676 | else if (discarded_section (sec)) |
529fcb95 | 4677 | { |
e5d08002 L |
4678 | /* Symbols from discarded section are undefined. We keep |
4679 | its visibility. */ | |
529fcb95 | 4680 | sec = bfd_und_section_ptr; |
97196564 | 4681 | discarded = TRUE; |
529fcb95 PB |
4682 | isym->st_shndx = SHN_UNDEF; |
4683 | } | |
4ad4eba5 AM |
4684 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
4685 | value -= sec->vma; | |
4686 | } | |
4ad4eba5 AM |
4687 | |
4688 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
4689 | isym->st_name); | |
4690 | if (name == NULL) | |
4691 | goto error_free_vers; | |
4692 | ||
4693 | if (isym->st_shndx == SHN_COMMON | |
02d00247 AM |
4694 | && (abfd->flags & BFD_PLUGIN) != 0) |
4695 | { | |
4696 | asection *xc = bfd_get_section_by_name (abfd, "COMMON"); | |
4697 | ||
4698 | if (xc == NULL) | |
4699 | { | |
4700 | flagword sflags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP | |
4701 | | SEC_EXCLUDE); | |
4702 | xc = bfd_make_section_with_flags (abfd, "COMMON", sflags); | |
4703 | if (xc == NULL) | |
4704 | goto error_free_vers; | |
4705 | } | |
4706 | sec = xc; | |
4707 | } | |
4708 | else if (isym->st_shndx == SHN_COMMON | |
4709 | && ELF_ST_TYPE (isym->st_info) == STT_TLS | |
0e1862bb | 4710 | && !bfd_link_relocatable (info)) |
4ad4eba5 AM |
4711 | { |
4712 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
4713 | ||
4714 | if (tcomm == NULL) | |
4715 | { | |
02d00247 AM |
4716 | flagword sflags = (SEC_ALLOC | SEC_THREAD_LOCAL | SEC_IS_COMMON |
4717 | | SEC_LINKER_CREATED); | |
4718 | tcomm = bfd_make_section_with_flags (abfd, ".tcommon", sflags); | |
3496cb2a | 4719 | if (tcomm == NULL) |
4ad4eba5 AM |
4720 | goto error_free_vers; |
4721 | } | |
4722 | sec = tcomm; | |
4723 | } | |
66eb6687 | 4724 | else if (bed->elf_add_symbol_hook) |
4ad4eba5 | 4725 | { |
66eb6687 AM |
4726 | if (! (*bed->elf_add_symbol_hook) (abfd, info, isym, &name, &flags, |
4727 | &sec, &value)) | |
4ad4eba5 AM |
4728 | goto error_free_vers; |
4729 | ||
4730 | /* The hook function sets the name to NULL if this symbol | |
4731 | should be skipped for some reason. */ | |
4732 | if (name == NULL) | |
4733 | continue; | |
4734 | } | |
4735 | ||
4736 | /* Sanity check that all possibilities were handled. */ | |
4737 | if (sec == NULL) | |
4538d1c7 | 4738 | abort (); |
4ad4eba5 | 4739 | |
191c0c42 AM |
4740 | /* Silently discard TLS symbols from --just-syms. There's |
4741 | no way to combine a static TLS block with a new TLS block | |
4742 | for this executable. */ | |
4743 | if (ELF_ST_TYPE (isym->st_info) == STT_TLS | |
4744 | && sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
4745 | continue; | |
4746 | ||
4ad4eba5 AM |
4747 | if (bfd_is_und_section (sec) |
4748 | || bfd_is_com_section (sec)) | |
4749 | definition = FALSE; | |
4750 | else | |
4751 | definition = TRUE; | |
4752 | ||
4753 | size_change_ok = FALSE; | |
66eb6687 | 4754 | type_change_ok = bed->type_change_ok; |
37a9e49a | 4755 | old_weak = FALSE; |
6e33951e | 4756 | matched = FALSE; |
4ad4eba5 AM |
4757 | old_alignment = 0; |
4758 | old_bfd = NULL; | |
af44c138 | 4759 | new_sec = sec; |
4ad4eba5 | 4760 | |
66eb6687 | 4761 | if (is_elf_hash_table (htab)) |
4ad4eba5 AM |
4762 | { |
4763 | Elf_Internal_Versym iver; | |
4764 | unsigned int vernum = 0; | |
4765 | bfd_boolean skip; | |
4766 | ||
fc0e6df6 | 4767 | if (ever == NULL) |
4ad4eba5 | 4768 | { |
fc0e6df6 PB |
4769 | if (info->default_imported_symver) |
4770 | /* Use the default symbol version created earlier. */ | |
4771 | iver.vs_vers = elf_tdata (abfd)->cverdefs; | |
4772 | else | |
4773 | iver.vs_vers = 0; | |
4774 | } | |
be22c732 NC |
4775 | else if (ever >= extversym_end) |
4776 | { | |
4777 | /* xgettext:c-format */ | |
4778 | _bfd_error_handler (_("%pB: not enough version information"), | |
4779 | abfd); | |
4780 | bfd_set_error (bfd_error_bad_value); | |
4781 | goto error_free_vers; | |
4782 | } | |
fc0e6df6 PB |
4783 | else |
4784 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
4785 | ||
4786 | vernum = iver.vs_vers & VERSYM_VERSION; | |
4787 | ||
4788 | /* If this is a hidden symbol, or if it is not version | |
4789 | 1, we append the version name to the symbol name. | |
cc86ff91 EB |
4790 | However, we do not modify a non-hidden absolute symbol |
4791 | if it is not a function, because it might be the version | |
4792 | symbol itself. FIXME: What if it isn't? */ | |
fc0e6df6 | 4793 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 |
fcb93ecf PB |
4794 | || (vernum > 1 |
4795 | && (!bfd_is_abs_section (sec) | |
4796 | || bed->is_function_type (ELF_ST_TYPE (isym->st_info))))) | |
fc0e6df6 PB |
4797 | { |
4798 | const char *verstr; | |
4799 | size_t namelen, verlen, newlen; | |
4800 | char *newname, *p; | |
4801 | ||
4802 | if (isym->st_shndx != SHN_UNDEF) | |
4ad4eba5 | 4803 | { |
fc0e6df6 PB |
4804 | if (vernum > elf_tdata (abfd)->cverdefs) |
4805 | verstr = NULL; | |
4806 | else if (vernum > 1) | |
4807 | verstr = | |
4808 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
4809 | else | |
4810 | verstr = ""; | |
4ad4eba5 | 4811 | |
fc0e6df6 | 4812 | if (verstr == NULL) |
4ad4eba5 | 4813 | { |
4eca0228 | 4814 | _bfd_error_handler |
695344c0 | 4815 | /* xgettext:c-format */ |
871b3ab2 | 4816 | (_("%pB: %s: invalid version %u (max %d)"), |
fc0e6df6 PB |
4817 | abfd, name, vernum, |
4818 | elf_tdata (abfd)->cverdefs); | |
4819 | bfd_set_error (bfd_error_bad_value); | |
4820 | goto error_free_vers; | |
4ad4eba5 | 4821 | } |
fc0e6df6 PB |
4822 | } |
4823 | else | |
4824 | { | |
4825 | /* We cannot simply test for the number of | |
4826 | entries in the VERNEED section since the | |
4827 | numbers for the needed versions do not start | |
4828 | at 0. */ | |
4829 | Elf_Internal_Verneed *t; | |
4830 | ||
4831 | verstr = NULL; | |
4832 | for (t = elf_tdata (abfd)->verref; | |
4833 | t != NULL; | |
4834 | t = t->vn_nextref) | |
4ad4eba5 | 4835 | { |
fc0e6df6 | 4836 | Elf_Internal_Vernaux *a; |
4ad4eba5 | 4837 | |
fc0e6df6 PB |
4838 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) |
4839 | { | |
4840 | if (a->vna_other == vernum) | |
4ad4eba5 | 4841 | { |
fc0e6df6 PB |
4842 | verstr = a->vna_nodename; |
4843 | break; | |
4ad4eba5 | 4844 | } |
4ad4eba5 | 4845 | } |
fc0e6df6 PB |
4846 | if (a != NULL) |
4847 | break; | |
4848 | } | |
4849 | if (verstr == NULL) | |
4850 | { | |
4eca0228 | 4851 | _bfd_error_handler |
695344c0 | 4852 | /* xgettext:c-format */ |
871b3ab2 | 4853 | (_("%pB: %s: invalid needed version %d"), |
fc0e6df6 PB |
4854 | abfd, name, vernum); |
4855 | bfd_set_error (bfd_error_bad_value); | |
4856 | goto error_free_vers; | |
4ad4eba5 | 4857 | } |
4ad4eba5 | 4858 | } |
fc0e6df6 PB |
4859 | |
4860 | namelen = strlen (name); | |
4861 | verlen = strlen (verstr); | |
4862 | newlen = namelen + verlen + 2; | |
4863 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4864 | && isym->st_shndx != SHN_UNDEF) | |
4865 | ++newlen; | |
4866 | ||
a50b1753 | 4867 | newname = (char *) bfd_hash_allocate (&htab->root.table, newlen); |
fc0e6df6 PB |
4868 | if (newname == NULL) |
4869 | goto error_free_vers; | |
4870 | memcpy (newname, name, namelen); | |
4871 | p = newname + namelen; | |
4872 | *p++ = ELF_VER_CHR; | |
4873 | /* If this is a defined non-hidden version symbol, | |
4874 | we add another @ to the name. This indicates the | |
4875 | default version of the symbol. */ | |
4876 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4877 | && isym->st_shndx != SHN_UNDEF) | |
4878 | *p++ = ELF_VER_CHR; | |
4879 | memcpy (p, verstr, verlen + 1); | |
4880 | ||
4881 | name = newname; | |
4ad4eba5 AM |
4882 | } |
4883 | ||
cd3416da AM |
4884 | /* If this symbol has default visibility and the user has |
4885 | requested we not re-export it, then mark it as hidden. */ | |
a0d49154 | 4886 | if (!bfd_is_und_section (sec) |
cd3416da | 4887 | && !dynamic |
ce875075 | 4888 | && abfd->no_export |
cd3416da AM |
4889 | && ELF_ST_VISIBILITY (isym->st_other) != STV_INTERNAL) |
4890 | isym->st_other = (STV_HIDDEN | |
4891 | | (isym->st_other & ~ELF_ST_VISIBILITY (-1))); | |
4892 | ||
4f3fedcf AM |
4893 | if (!_bfd_elf_merge_symbol (abfd, info, name, isym, &sec, &value, |
4894 | sym_hash, &old_bfd, &old_weak, | |
4895 | &old_alignment, &skip, &override, | |
6e33951e L |
4896 | &type_change_ok, &size_change_ok, |
4897 | &matched)) | |
4ad4eba5 AM |
4898 | goto error_free_vers; |
4899 | ||
4900 | if (skip) | |
4901 | continue; | |
4902 | ||
6e33951e L |
4903 | /* Override a definition only if the new symbol matches the |
4904 | existing one. */ | |
4905 | if (override && matched) | |
4ad4eba5 AM |
4906 | definition = FALSE; |
4907 | ||
4908 | h = *sym_hash; | |
4909 | while (h->root.type == bfd_link_hash_indirect | |
4910 | || h->root.type == bfd_link_hash_warning) | |
4911 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4912 | ||
4ad4eba5 | 4913 | if (elf_tdata (abfd)->verdef != NULL |
4ad4eba5 AM |
4914 | && vernum > 1 |
4915 | && definition) | |
4916 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
4917 | } | |
4918 | ||
4919 | if (! (_bfd_generic_link_add_one_symbol | |
7ba11550 AM |
4920 | (info, override ? override : abfd, name, flags, sec, value, |
4921 | NULL, FALSE, bed->collect, | |
4ad4eba5 AM |
4922 | (struct bfd_link_hash_entry **) sym_hash))) |
4923 | goto error_free_vers; | |
4924 | ||
4925 | h = *sym_hash; | |
90c984fc L |
4926 | /* We need to make sure that indirect symbol dynamic flags are |
4927 | updated. */ | |
4928 | hi = h; | |
4ad4eba5 AM |
4929 | while (h->root.type == bfd_link_hash_indirect |
4930 | || h->root.type == bfd_link_hash_warning) | |
4931 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3e7a7d11 | 4932 | |
97196564 L |
4933 | /* Setting the index to -3 tells elf_link_output_extsym that |
4934 | this symbol is defined in a discarded section. */ | |
4935 | if (discarded) | |
4936 | h->indx = -3; | |
4937 | ||
4ad4eba5 AM |
4938 | *sym_hash = h; |
4939 | ||
37a9e49a | 4940 | new_weak = (flags & BSF_WEAK) != 0; |
4ad4eba5 AM |
4941 | if (dynamic |
4942 | && definition | |
37a9e49a | 4943 | && new_weak |
fcb93ecf | 4944 | && !bed->is_function_type (ELF_ST_TYPE (isym->st_info)) |
66eb6687 | 4945 | && is_elf_hash_table (htab) |
60d67dc8 | 4946 | && h->u.alias == NULL) |
4ad4eba5 AM |
4947 | { |
4948 | /* Keep a list of all weak defined non function symbols from | |
60d67dc8 AM |
4949 | a dynamic object, using the alias field. Later in this |
4950 | function we will set the alias field to the correct | |
4ad4eba5 AM |
4951 | value. We only put non-function symbols from dynamic |
4952 | objects on this list, because that happens to be the only | |
4953 | time we need to know the normal symbol corresponding to a | |
4954 | weak symbol, and the information is time consuming to | |
60d67dc8 | 4955 | figure out. If the alias field is not already NULL, |
4ad4eba5 AM |
4956 | then this symbol was already defined by some previous |
4957 | dynamic object, and we will be using that previous | |
4958 | definition anyhow. */ | |
4959 | ||
60d67dc8 | 4960 | h->u.alias = weaks; |
4ad4eba5 | 4961 | weaks = h; |
4ad4eba5 AM |
4962 | } |
4963 | ||
4964 | /* Set the alignment of a common symbol. */ | |
a4d8e49b | 4965 | if ((common || bfd_is_com_section (sec)) |
4ad4eba5 AM |
4966 | && h->root.type == bfd_link_hash_common) |
4967 | { | |
4968 | unsigned int align; | |
4969 | ||
a4d8e49b | 4970 | if (common) |
af44c138 L |
4971 | align = bfd_log2 (isym->st_value); |
4972 | else | |
4973 | { | |
4974 | /* The new symbol is a common symbol in a shared object. | |
4975 | We need to get the alignment from the section. */ | |
4976 | align = new_sec->alignment_power; | |
4977 | } | |
595213d4 | 4978 | if (align > old_alignment) |
4ad4eba5 AM |
4979 | h->root.u.c.p->alignment_power = align; |
4980 | else | |
4981 | h->root.u.c.p->alignment_power = old_alignment; | |
4982 | } | |
4983 | ||
66eb6687 | 4984 | if (is_elf_hash_table (htab)) |
4ad4eba5 | 4985 | { |
4f3fedcf AM |
4986 | /* Set a flag in the hash table entry indicating the type of |
4987 | reference or definition we just found. A dynamic symbol | |
4988 | is one which is referenced or defined by both a regular | |
4989 | object and a shared object. */ | |
4990 | bfd_boolean dynsym = FALSE; | |
4991 | ||
1e3b96fd | 4992 | if (! dynamic) |
4f3fedcf AM |
4993 | { |
4994 | if (! definition) | |
4995 | { | |
4996 | h->ref_regular = 1; | |
4997 | if (bind != STB_WEAK) | |
4998 | h->ref_regular_nonweak = 1; | |
4999 | } | |
5000 | else | |
5001 | { | |
5002 | h->def_regular = 1; | |
5003 | if (h->def_dynamic) | |
5004 | { | |
5005 | h->def_dynamic = 0; | |
5006 | h->ref_dynamic = 1; | |
5007 | } | |
5008 | } | |
5009 | ||
5010 | /* If the indirect symbol has been forced local, don't | |
5011 | make the real symbol dynamic. */ | |
5012 | if ((h == hi || !hi->forced_local) | |
0e1862bb | 5013 | && (bfd_link_dll (info) |
4f3fedcf AM |
5014 | || h->def_dynamic |
5015 | || h->ref_dynamic)) | |
5016 | dynsym = TRUE; | |
5017 | } | |
5018 | else | |
5019 | { | |
5020 | if (! definition) | |
5021 | { | |
5022 | h->ref_dynamic = 1; | |
5023 | hi->ref_dynamic = 1; | |
5024 | } | |
5025 | else | |
5026 | { | |
5027 | h->def_dynamic = 1; | |
5028 | hi->def_dynamic = 1; | |
5029 | } | |
5030 | ||
5031 | /* If the indirect symbol has been forced local, don't | |
5032 | make the real symbol dynamic. */ | |
5033 | if ((h == hi || !hi->forced_local) | |
5034 | && (h->def_regular | |
5035 | || h->ref_regular | |
60d67dc8 AM |
5036 | || (h->is_weakalias |
5037 | && weakdef (h)->dynindx != -1))) | |
4f3fedcf AM |
5038 | dynsym = TRUE; |
5039 | } | |
5040 | ||
5041 | /* Check to see if we need to add an indirect symbol for | |
5042 | the default name. */ | |
5043 | if (definition | |
5044 | || (!override && h->root.type == bfd_link_hash_common)) | |
5045 | if (!_bfd_elf_add_default_symbol (abfd, info, h, name, isym, | |
5046 | sec, value, &old_bfd, &dynsym)) | |
5047 | goto error_free_vers; | |
4ad4eba5 AM |
5048 | |
5049 | /* Check the alignment when a common symbol is involved. This | |
5050 | can change when a common symbol is overridden by a normal | |
5051 | definition or a common symbol is ignored due to the old | |
5052 | normal definition. We need to make sure the maximum | |
5053 | alignment is maintained. */ | |
a4d8e49b | 5054 | if ((old_alignment || common) |
4ad4eba5 AM |
5055 | && h->root.type != bfd_link_hash_common) |
5056 | { | |
5057 | unsigned int common_align; | |
5058 | unsigned int normal_align; | |
5059 | unsigned int symbol_align; | |
5060 | bfd *normal_bfd; | |
5061 | bfd *common_bfd; | |
5062 | ||
3a81e825 AM |
5063 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
5064 | || h->root.type == bfd_link_hash_defweak); | |
5065 | ||
4ad4eba5 AM |
5066 | symbol_align = ffs (h->root.u.def.value) - 1; |
5067 | if (h->root.u.def.section->owner != NULL | |
0616a280 AM |
5068 | && (h->root.u.def.section->owner->flags |
5069 | & (DYNAMIC | BFD_PLUGIN)) == 0) | |
4ad4eba5 AM |
5070 | { |
5071 | normal_align = h->root.u.def.section->alignment_power; | |
5072 | if (normal_align > symbol_align) | |
5073 | normal_align = symbol_align; | |
5074 | } | |
5075 | else | |
5076 | normal_align = symbol_align; | |
5077 | ||
5078 | if (old_alignment) | |
5079 | { | |
5080 | common_align = old_alignment; | |
5081 | common_bfd = old_bfd; | |
5082 | normal_bfd = abfd; | |
5083 | } | |
5084 | else | |
5085 | { | |
5086 | common_align = bfd_log2 (isym->st_value); | |
5087 | common_bfd = abfd; | |
5088 | normal_bfd = old_bfd; | |
5089 | } | |
5090 | ||
5091 | if (normal_align < common_align) | |
d07676f8 NC |
5092 | { |
5093 | /* PR binutils/2735 */ | |
5094 | if (normal_bfd == NULL) | |
4eca0228 | 5095 | _bfd_error_handler |
695344c0 | 5096 | /* xgettext:c-format */ |
9793eb77 | 5097 | (_("warning: alignment %u of common symbol `%s' in %pB is" |
871b3ab2 | 5098 | " greater than the alignment (%u) of its section %pA"), |
c08bb8dd AM |
5099 | 1 << common_align, name, common_bfd, |
5100 | 1 << normal_align, h->root.u.def.section); | |
d07676f8 | 5101 | else |
4eca0228 | 5102 | _bfd_error_handler |
695344c0 | 5103 | /* xgettext:c-format */ |
9793eb77 | 5104 | (_("warning: alignment %u of symbol `%s' in %pB" |
871b3ab2 | 5105 | " is smaller than %u in %pB"), |
c08bb8dd AM |
5106 | 1 << normal_align, name, normal_bfd, |
5107 | 1 << common_align, common_bfd); | |
d07676f8 | 5108 | } |
4ad4eba5 AM |
5109 | } |
5110 | ||
83ad0046 | 5111 | /* Remember the symbol size if it isn't undefined. */ |
3a81e825 AM |
5112 | if (isym->st_size != 0 |
5113 | && isym->st_shndx != SHN_UNDEF | |
4ad4eba5 AM |
5114 | && (definition || h->size == 0)) |
5115 | { | |
83ad0046 L |
5116 | if (h->size != 0 |
5117 | && h->size != isym->st_size | |
5118 | && ! size_change_ok) | |
4eca0228 | 5119 | _bfd_error_handler |
695344c0 | 5120 | /* xgettext:c-format */ |
9793eb77 | 5121 | (_("warning: size of symbol `%s' changed" |
2dcf00ce AM |
5122 | " from %" PRIu64 " in %pB to %" PRIu64 " in %pB"), |
5123 | name, (uint64_t) h->size, old_bfd, | |
5124 | (uint64_t) isym->st_size, abfd); | |
4ad4eba5 AM |
5125 | |
5126 | h->size = isym->st_size; | |
5127 | } | |
5128 | ||
5129 | /* If this is a common symbol, then we always want H->SIZE | |
5130 | to be the size of the common symbol. The code just above | |
5131 | won't fix the size if a common symbol becomes larger. We | |
5132 | don't warn about a size change here, because that is | |
4f3fedcf | 5133 | covered by --warn-common. Allow changes between different |
fcb93ecf | 5134 | function types. */ |
4ad4eba5 AM |
5135 | if (h->root.type == bfd_link_hash_common) |
5136 | h->size = h->root.u.c.size; | |
5137 | ||
5138 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE | |
37a9e49a L |
5139 | && ((definition && !new_weak) |
5140 | || (old_weak && h->root.type == bfd_link_hash_common) | |
5141 | || h->type == STT_NOTYPE)) | |
4ad4eba5 | 5142 | { |
2955ec4c L |
5143 | unsigned int type = ELF_ST_TYPE (isym->st_info); |
5144 | ||
5145 | /* Turn an IFUNC symbol from a DSO into a normal FUNC | |
5146 | symbol. */ | |
5147 | if (type == STT_GNU_IFUNC | |
5148 | && (abfd->flags & DYNAMIC) != 0) | |
5149 | type = STT_FUNC; | |
4ad4eba5 | 5150 | |
2955ec4c L |
5151 | if (h->type != type) |
5152 | { | |
5153 | if (h->type != STT_NOTYPE && ! type_change_ok) | |
695344c0 | 5154 | /* xgettext:c-format */ |
4eca0228 | 5155 | _bfd_error_handler |
9793eb77 | 5156 | (_("warning: type of symbol `%s' changed" |
871b3ab2 | 5157 | " from %d to %d in %pB"), |
c08bb8dd | 5158 | name, h->type, type, abfd); |
2955ec4c L |
5159 | |
5160 | h->type = type; | |
5161 | } | |
4ad4eba5 AM |
5162 | } |
5163 | ||
54ac0771 | 5164 | /* Merge st_other field. */ |
b8417128 | 5165 | elf_merge_st_other (abfd, h, isym, sec, definition, dynamic); |
4ad4eba5 | 5166 | |
c3df8c14 | 5167 | /* We don't want to make debug symbol dynamic. */ |
0e1862bb L |
5168 | if (definition |
5169 | && (sec->flags & SEC_DEBUGGING) | |
5170 | && !bfd_link_relocatable (info)) | |
c3df8c14 AM |
5171 | dynsym = FALSE; |
5172 | ||
35fc36a8 | 5173 | if (definition) |
35399224 L |
5174 | { |
5175 | h->target_internal = isym->st_target_internal; | |
5176 | h->unique_global = (flags & BSF_GNU_UNIQUE) != 0; | |
5177 | } | |
35fc36a8 | 5178 | |
4ad4eba5 AM |
5179 | if (definition && !dynamic) |
5180 | { | |
5181 | char *p = strchr (name, ELF_VER_CHR); | |
5182 | if (p != NULL && p[1] != ELF_VER_CHR) | |
5183 | { | |
5184 | /* Queue non-default versions so that .symver x, x@FOO | |
5185 | aliases can be checked. */ | |
66eb6687 | 5186 | if (!nondeflt_vers) |
4ad4eba5 | 5187 | { |
986f0783 AM |
5188 | size_t amt = ((isymend - isym + 1) |
5189 | * sizeof (struct elf_link_hash_entry *)); | |
ca4be51c AM |
5190 | nondeflt_vers |
5191 | = (struct elf_link_hash_entry **) bfd_malloc (amt); | |
14b1c01e AM |
5192 | if (!nondeflt_vers) |
5193 | goto error_free_vers; | |
4ad4eba5 | 5194 | } |
66eb6687 | 5195 | nondeflt_vers[nondeflt_vers_cnt++] = h; |
4ad4eba5 AM |
5196 | } |
5197 | } | |
5198 | ||
1e3b96fd | 5199 | if (dynsym && (abfd->flags & BFD_PLUGIN) == 0 && h->dynindx == -1) |
4ad4eba5 | 5200 | { |
c152c796 | 5201 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4ad4eba5 | 5202 | goto error_free_vers; |
60d67dc8 AM |
5203 | if (h->is_weakalias |
5204 | && weakdef (h)->dynindx == -1) | |
4ad4eba5 | 5205 | { |
60d67dc8 | 5206 | if (!bfd_elf_link_record_dynamic_symbol (info, weakdef (h))) |
4ad4eba5 AM |
5207 | goto error_free_vers; |
5208 | } | |
5209 | } | |
1f599d0e | 5210 | else if (h->dynindx != -1) |
4ad4eba5 AM |
5211 | /* If the symbol already has a dynamic index, but |
5212 | visibility says it should not be visible, turn it into | |
5213 | a local symbol. */ | |
5214 | switch (ELF_ST_VISIBILITY (h->other)) | |
5215 | { | |
5216 | case STV_INTERNAL: | |
5217 | case STV_HIDDEN: | |
5218 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
5219 | dynsym = FALSE; | |
5220 | break; | |
5221 | } | |
5222 | ||
5223 | if (!add_needed | |
aef28989 | 5224 | && matched |
4ad4eba5 | 5225 | && definition |
010e5ae2 | 5226 | && ((dynsym |
a896df97 | 5227 | && h->ref_regular_nonweak) |
ffa9430d | 5228 | || (h->ref_dynamic_nonweak |
010e5ae2 | 5229 | && (elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0 |
7b15fa7a AM |
5230 | && !on_needed_list (elf_dt_name (abfd), |
5231 | htab->needed, NULL)))) | |
4ad4eba5 | 5232 | { |
4ad4eba5 AM |
5233 | const char *soname = elf_dt_name (abfd); |
5234 | ||
16e4ecc0 AM |
5235 | info->callbacks->minfo ("%!", soname, old_bfd, |
5236 | h->root.root.string); | |
5237 | ||
4ad4eba5 AM |
5238 | /* A symbol from a library loaded via DT_NEEDED of some |
5239 | other library is referenced by a regular object. | |
e56f61be | 5240 | Add a DT_NEEDED entry for it. Issue an error if |
b918acf9 NC |
5241 | --no-add-needed is used and the reference was not |
5242 | a weak one. */ | |
4f3fedcf | 5243 | if (old_bfd != NULL |
b918acf9 | 5244 | && (elf_dyn_lib_class (abfd) & DYN_NO_NEEDED) != 0) |
e56f61be | 5245 | { |
4eca0228 | 5246 | _bfd_error_handler |
695344c0 | 5247 | /* xgettext:c-format */ |
871b3ab2 | 5248 | (_("%pB: undefined reference to symbol '%s'"), |
4f3fedcf | 5249 | old_bfd, name); |
ff5ac77b | 5250 | bfd_set_error (bfd_error_missing_dso); |
e56f61be L |
5251 | goto error_free_vers; |
5252 | } | |
5253 | ||
a50b1753 | 5254 | elf_dyn_lib_class (abfd) = (enum dynamic_lib_link_class) |
ca4be51c | 5255 | (elf_dyn_lib_class (abfd) & ~DYN_AS_NEEDED); |
a5db907e | 5256 | |
e310298c AM |
5257 | /* Create dynamic sections for backends that require |
5258 | that be done before setup_gnu_properties. */ | |
5259 | if (!_bfd_elf_link_create_dynamic_sections (abfd, info)) | |
5260 | return FALSE; | |
4ad4eba5 | 5261 | add_needed = TRUE; |
4ad4eba5 AM |
5262 | } |
5263 | } | |
5264 | } | |
5265 | ||
a83ef4d1 L |
5266 | if (info->lto_plugin_active |
5267 | && !bfd_link_relocatable (info) | |
5268 | && (abfd->flags & BFD_PLUGIN) == 0 | |
5269 | && !just_syms | |
5270 | && extsymcount) | |
5271 | { | |
5272 | int r_sym_shift; | |
5273 | ||
5274 | if (bed->s->arch_size == 32) | |
5275 | r_sym_shift = 8; | |
5276 | else | |
5277 | r_sym_shift = 32; | |
5278 | ||
5279 | /* If linker plugin is enabled, set non_ir_ref_regular on symbols | |
5280 | referenced in regular objects so that linker plugin will get | |
5281 | the correct symbol resolution. */ | |
5282 | ||
5283 | sym_hash = elf_sym_hashes (abfd); | |
5284 | for (s = abfd->sections; s != NULL; s = s->next) | |
5285 | { | |
5286 | Elf_Internal_Rela *internal_relocs; | |
5287 | Elf_Internal_Rela *rel, *relend; | |
5288 | ||
5289 | /* Don't check relocations in excluded sections. */ | |
5290 | if ((s->flags & SEC_RELOC) == 0 | |
5291 | || s->reloc_count == 0 | |
5292 | || (s->flags & SEC_EXCLUDE) != 0 | |
5293 | || ((info->strip == strip_all | |
5294 | || info->strip == strip_debugger) | |
5295 | && (s->flags & SEC_DEBUGGING) != 0)) | |
5296 | continue; | |
5297 | ||
5298 | internal_relocs = _bfd_elf_link_read_relocs (abfd, s, NULL, | |
5299 | NULL, | |
5300 | info->keep_memory); | |
5301 | if (internal_relocs == NULL) | |
5302 | goto error_free_vers; | |
5303 | ||
5304 | rel = internal_relocs; | |
5305 | relend = rel + s->reloc_count; | |
5306 | for ( ; rel < relend; rel++) | |
5307 | { | |
5308 | unsigned long r_symndx = rel->r_info >> r_sym_shift; | |
5309 | struct elf_link_hash_entry *h; | |
5310 | ||
5311 | /* Skip local symbols. */ | |
5312 | if (r_symndx < extsymoff) | |
5313 | continue; | |
5314 | ||
5315 | h = sym_hash[r_symndx - extsymoff]; | |
5316 | if (h != NULL) | |
5317 | h->root.non_ir_ref_regular = 1; | |
5318 | } | |
5319 | ||
5320 | if (elf_section_data (s)->relocs != internal_relocs) | |
5321 | free (internal_relocs); | |
5322 | } | |
5323 | } | |
5324 | ||
c9594989 AM |
5325 | free (extversym); |
5326 | extversym = NULL; | |
5327 | free (isymbuf); | |
5328 | isymbuf = NULL; | |
66eb6687 AM |
5329 | |
5330 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
5331 | { | |
5332 | unsigned int i; | |
5333 | ||
5334 | /* Restore the symbol table. */ | |
f45794cb AM |
5335 | old_ent = (char *) old_tab + tabsize; |
5336 | memset (elf_sym_hashes (abfd), 0, | |
5337 | extsymcount * sizeof (struct elf_link_hash_entry *)); | |
4f87808c AM |
5338 | htab->root.table.table = old_table; |
5339 | htab->root.table.size = old_size; | |
5340 | htab->root.table.count = old_count; | |
66eb6687 | 5341 | memcpy (htab->root.table.table, old_tab, tabsize); |
66eb6687 AM |
5342 | htab->root.undefs = old_undefs; |
5343 | htab->root.undefs_tail = old_undefs_tail; | |
e310298c AM |
5344 | if (htab->dynstr != NULL) |
5345 | _bfd_elf_strtab_restore (htab->dynstr, old_strtab); | |
5b677558 AM |
5346 | free (old_strtab); |
5347 | old_strtab = NULL; | |
66eb6687 AM |
5348 | for (i = 0; i < htab->root.table.size; i++) |
5349 | { | |
5350 | struct bfd_hash_entry *p; | |
5351 | struct elf_link_hash_entry *h; | |
4070765b | 5352 | unsigned int non_ir_ref_dynamic; |
66eb6687 AM |
5353 | |
5354 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
5355 | { | |
4070765b | 5356 | /* Preserve non_ir_ref_dynamic so that this symbol |
59fa66c5 L |
5357 | will be exported when the dynamic lib becomes needed |
5358 | in the second pass. */ | |
7ba11550 AM |
5359 | h = (struct elf_link_hash_entry *) p; |
5360 | if (h->root.type == bfd_link_hash_warning) | |
5361 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4070765b | 5362 | non_ir_ref_dynamic = h->root.non_ir_ref_dynamic; |
7ba11550 | 5363 | |
2de92251 | 5364 | h = (struct elf_link_hash_entry *) p; |
7ba11550 AM |
5365 | memcpy (h, old_ent, htab->root.table.entsize); |
5366 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
5367 | if (h->root.type == bfd_link_hash_warning) |
5368 | { | |
a4542f1b | 5369 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
7ba11550 AM |
5370 | memcpy (h, old_ent, htab->root.table.entsize); |
5371 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 | 5372 | } |
a4542f1b | 5373 | if (h->root.type == bfd_link_hash_common) |
3e0882af | 5374 | { |
7ba11550 AM |
5375 | memcpy (h->root.u.c.p, old_ent, sizeof (*h->root.u.c.p)); |
5376 | old_ent = (char *) old_ent + sizeof (*h->root.u.c.p); | |
3e0882af | 5377 | } |
4070765b | 5378 | h->root.non_ir_ref_dynamic = non_ir_ref_dynamic; |
66eb6687 AM |
5379 | } |
5380 | } | |
5381 | ||
5061a885 AM |
5382 | /* Make a special call to the linker "notice" function to |
5383 | tell it that symbols added for crefs may need to be removed. */ | |
e5034e59 | 5384 | if (!(*bed->notice_as_needed) (abfd, info, notice_not_needed)) |
9af2a943 | 5385 | goto error_free_vers; |
5061a885 | 5386 | |
66eb6687 AM |
5387 | free (old_tab); |
5388 | objalloc_free_block ((struct objalloc *) htab->root.table.memory, | |
5389 | alloc_mark); | |
c9594989 | 5390 | free (nondeflt_vers); |
66eb6687 AM |
5391 | return TRUE; |
5392 | } | |
2de92251 | 5393 | |
66eb6687 AM |
5394 | if (old_tab != NULL) |
5395 | { | |
e5034e59 | 5396 | if (!(*bed->notice_as_needed) (abfd, info, notice_needed)) |
9af2a943 | 5397 | goto error_free_vers; |
66eb6687 AM |
5398 | free (old_tab); |
5399 | old_tab = NULL; | |
5400 | } | |
5401 | ||
c6e8a9a8 L |
5402 | /* Now that all the symbols from this input file are created, if |
5403 | not performing a relocatable link, handle .symver foo, foo@BAR | |
5404 | such that any relocs against foo become foo@BAR. */ | |
0e1862bb | 5405 | if (!bfd_link_relocatable (info) && nondeflt_vers != NULL) |
4ad4eba5 | 5406 | { |
ef53be89 | 5407 | size_t cnt, symidx; |
4ad4eba5 AM |
5408 | |
5409 | for (cnt = 0; cnt < nondeflt_vers_cnt; ++cnt) | |
5410 | { | |
5411 | struct elf_link_hash_entry *h = nondeflt_vers[cnt], *hi; | |
5412 | char *shortname, *p; | |
986f0783 | 5413 | size_t amt; |
4ad4eba5 AM |
5414 | |
5415 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
5416 | if (p == NULL | |
5417 | || (h->root.type != bfd_link_hash_defined | |
5418 | && h->root.type != bfd_link_hash_defweak)) | |
5419 | continue; | |
5420 | ||
5421 | amt = p - h->root.root.string; | |
a50b1753 | 5422 | shortname = (char *) bfd_malloc (amt + 1); |
14b1c01e AM |
5423 | if (!shortname) |
5424 | goto error_free_vers; | |
4ad4eba5 AM |
5425 | memcpy (shortname, h->root.root.string, amt); |
5426 | shortname[amt] = '\0'; | |
5427 | ||
5428 | hi = (struct elf_link_hash_entry *) | |
66eb6687 | 5429 | bfd_link_hash_lookup (&htab->root, shortname, |
4ad4eba5 AM |
5430 | FALSE, FALSE, FALSE); |
5431 | if (hi != NULL | |
5432 | && hi->root.type == h->root.type | |
5433 | && hi->root.u.def.value == h->root.u.def.value | |
5434 | && hi->root.u.def.section == h->root.u.def.section) | |
5435 | { | |
5436 | (*bed->elf_backend_hide_symbol) (info, hi, TRUE); | |
5437 | hi->root.type = bfd_link_hash_indirect; | |
5438 | hi->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
fcfa13d2 | 5439 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
4ad4eba5 AM |
5440 | sym_hash = elf_sym_hashes (abfd); |
5441 | if (sym_hash) | |
5442 | for (symidx = 0; symidx < extsymcount; ++symidx) | |
5443 | if (sym_hash[symidx] == hi) | |
5444 | { | |
5445 | sym_hash[symidx] = h; | |
5446 | break; | |
5447 | } | |
5448 | } | |
5449 | free (shortname); | |
5450 | } | |
5451 | free (nondeflt_vers); | |
5452 | nondeflt_vers = NULL; | |
5453 | } | |
5454 | ||
60d67dc8 | 5455 | /* Now set the alias field correctly for all the weak defined |
4ad4eba5 AM |
5456 | symbols we found. The only way to do this is to search all the |
5457 | symbols. Since we only need the information for non functions in | |
5458 | dynamic objects, that's the only time we actually put anything on | |
5459 | the list WEAKS. We need this information so that if a regular | |
5460 | object refers to a symbol defined weakly in a dynamic object, the | |
5461 | real symbol in the dynamic object is also put in the dynamic | |
5462 | symbols; we also must arrange for both symbols to point to the | |
5463 | same memory location. We could handle the general case of symbol | |
5464 | aliasing, but a general symbol alias can only be generated in | |
5465 | assembler code, handling it correctly would be very time | |
5466 | consuming, and other ELF linkers don't handle general aliasing | |
5467 | either. */ | |
5468 | if (weaks != NULL) | |
5469 | { | |
5470 | struct elf_link_hash_entry **hpp; | |
5471 | struct elf_link_hash_entry **hppend; | |
5472 | struct elf_link_hash_entry **sorted_sym_hash; | |
5473 | struct elf_link_hash_entry *h; | |
986f0783 | 5474 | size_t sym_count, amt; |
4ad4eba5 AM |
5475 | |
5476 | /* Since we have to search the whole symbol list for each weak | |
5477 | defined symbol, search time for N weak defined symbols will be | |
5478 | O(N^2). Binary search will cut it down to O(NlogN). */ | |
986f0783 | 5479 | amt = extsymcount * sizeof (*sorted_sym_hash); |
3a3f4bf7 | 5480 | sorted_sym_hash = bfd_malloc (amt); |
4ad4eba5 AM |
5481 | if (sorted_sym_hash == NULL) |
5482 | goto error_return; | |
5483 | sym_hash = sorted_sym_hash; | |
5484 | hpp = elf_sym_hashes (abfd); | |
5485 | hppend = hpp + extsymcount; | |
5486 | sym_count = 0; | |
5487 | for (; hpp < hppend; hpp++) | |
5488 | { | |
5489 | h = *hpp; | |
5490 | if (h != NULL | |
5491 | && h->root.type == bfd_link_hash_defined | |
fcb93ecf | 5492 | && !bed->is_function_type (h->type)) |
4ad4eba5 AM |
5493 | { |
5494 | *sym_hash = h; | |
5495 | sym_hash++; | |
5496 | sym_count++; | |
5497 | } | |
5498 | } | |
5499 | ||
3a3f4bf7 | 5500 | qsort (sorted_sym_hash, sym_count, sizeof (*sorted_sym_hash), |
4ad4eba5 AM |
5501 | elf_sort_symbol); |
5502 | ||
5503 | while (weaks != NULL) | |
5504 | { | |
5505 | struct elf_link_hash_entry *hlook; | |
5506 | asection *slook; | |
5507 | bfd_vma vlook; | |
ed54588d | 5508 | size_t i, j, idx = 0; |
4ad4eba5 AM |
5509 | |
5510 | hlook = weaks; | |
60d67dc8 AM |
5511 | weaks = hlook->u.alias; |
5512 | hlook->u.alias = NULL; | |
4ad4eba5 | 5513 | |
e3e53eed AM |
5514 | if (hlook->root.type != bfd_link_hash_defined |
5515 | && hlook->root.type != bfd_link_hash_defweak) | |
5516 | continue; | |
5517 | ||
4ad4eba5 AM |
5518 | slook = hlook->root.u.def.section; |
5519 | vlook = hlook->root.u.def.value; | |
5520 | ||
4ad4eba5 AM |
5521 | i = 0; |
5522 | j = sym_count; | |
14160578 | 5523 | while (i != j) |
4ad4eba5 AM |
5524 | { |
5525 | bfd_signed_vma vdiff; | |
5526 | idx = (i + j) / 2; | |
14160578 | 5527 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
5528 | vdiff = vlook - h->root.u.def.value; |
5529 | if (vdiff < 0) | |
5530 | j = idx; | |
5531 | else if (vdiff > 0) | |
5532 | i = idx + 1; | |
5533 | else | |
5534 | { | |
d3435ae8 | 5535 | int sdiff = slook->id - h->root.u.def.section->id; |
4ad4eba5 AM |
5536 | if (sdiff < 0) |
5537 | j = idx; | |
5538 | else if (sdiff > 0) | |
5539 | i = idx + 1; | |
5540 | else | |
14160578 | 5541 | break; |
4ad4eba5 AM |
5542 | } |
5543 | } | |
5544 | ||
5545 | /* We didn't find a value/section match. */ | |
14160578 | 5546 | if (i == j) |
4ad4eba5 AM |
5547 | continue; |
5548 | ||
14160578 AM |
5549 | /* With multiple aliases, or when the weak symbol is already |
5550 | strongly defined, we have multiple matching symbols and | |
5551 | the binary search above may land on any of them. Step | |
5552 | one past the matching symbol(s). */ | |
5553 | while (++idx != j) | |
5554 | { | |
5555 | h = sorted_sym_hash[idx]; | |
5556 | if (h->root.u.def.section != slook | |
5557 | || h->root.u.def.value != vlook) | |
5558 | break; | |
5559 | } | |
5560 | ||
5561 | /* Now look back over the aliases. Since we sorted by size | |
5562 | as well as value and section, we'll choose the one with | |
5563 | the largest size. */ | |
5564 | while (idx-- != i) | |
4ad4eba5 | 5565 | { |
14160578 | 5566 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
5567 | |
5568 | /* Stop if value or section doesn't match. */ | |
14160578 AM |
5569 | if (h->root.u.def.section != slook |
5570 | || h->root.u.def.value != vlook) | |
4ad4eba5 AM |
5571 | break; |
5572 | else if (h != hlook) | |
5573 | { | |
60d67dc8 AM |
5574 | struct elf_link_hash_entry *t; |
5575 | ||
5576 | hlook->u.alias = h; | |
5577 | hlook->is_weakalias = 1; | |
5578 | t = h; | |
5579 | if (t->u.alias != NULL) | |
5580 | while (t->u.alias != h) | |
5581 | t = t->u.alias; | |
5582 | t->u.alias = hlook; | |
4ad4eba5 AM |
5583 | |
5584 | /* If the weak definition is in the list of dynamic | |
5585 | symbols, make sure the real definition is put | |
5586 | there as well. */ | |
5587 | if (hlook->dynindx != -1 && h->dynindx == -1) | |
5588 | { | |
c152c796 | 5589 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4dd07732 AM |
5590 | { |
5591 | err_free_sym_hash: | |
5592 | free (sorted_sym_hash); | |
5593 | goto error_return; | |
5594 | } | |
4ad4eba5 AM |
5595 | } |
5596 | ||
5597 | /* If the real definition is in the list of dynamic | |
5598 | symbols, make sure the weak definition is put | |
5599 | there as well. If we don't do this, then the | |
5600 | dynamic loader might not merge the entries for the | |
5601 | real definition and the weak definition. */ | |
5602 | if (h->dynindx != -1 && hlook->dynindx == -1) | |
5603 | { | |
c152c796 | 5604 | if (! bfd_elf_link_record_dynamic_symbol (info, hlook)) |
4dd07732 | 5605 | goto err_free_sym_hash; |
4ad4eba5 AM |
5606 | } |
5607 | break; | |
5608 | } | |
5609 | } | |
5610 | } | |
5611 | ||
5612 | free (sorted_sym_hash); | |
5613 | } | |
5614 | ||
33177bb1 AM |
5615 | if (bed->check_directives |
5616 | && !(*bed->check_directives) (abfd, info)) | |
5617 | return FALSE; | |
85fbca6a | 5618 | |
4ad4eba5 AM |
5619 | /* If this is a non-traditional link, try to optimize the handling |
5620 | of the .stab/.stabstr sections. */ | |
5621 | if (! dynamic | |
5622 | && ! info->traditional_format | |
66eb6687 | 5623 | && is_elf_hash_table (htab) |
4ad4eba5 AM |
5624 | && (info->strip != strip_all && info->strip != strip_debugger)) |
5625 | { | |
5626 | asection *stabstr; | |
5627 | ||
5628 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
5629 | if (stabstr != NULL) | |
5630 | { | |
5631 | bfd_size_type string_offset = 0; | |
5632 | asection *stab; | |
5633 | ||
5634 | for (stab = abfd->sections; stab; stab = stab->next) | |
0112cd26 | 5635 | if (CONST_STRNEQ (stab->name, ".stab") |
4ad4eba5 AM |
5636 | && (!stab->name[5] || |
5637 | (stab->name[5] == '.' && ISDIGIT (stab->name[6]))) | |
5638 | && (stab->flags & SEC_MERGE) == 0 | |
5639 | && !bfd_is_abs_section (stab->output_section)) | |
5640 | { | |
5641 | struct bfd_elf_section_data *secdata; | |
5642 | ||
5643 | secdata = elf_section_data (stab); | |
66eb6687 AM |
5644 | if (! _bfd_link_section_stabs (abfd, &htab->stab_info, stab, |
5645 | stabstr, &secdata->sec_info, | |
4ad4eba5 AM |
5646 | &string_offset)) |
5647 | goto error_return; | |
5648 | if (secdata->sec_info) | |
dbaa2011 | 5649 | stab->sec_info_type = SEC_INFO_TYPE_STABS; |
4ad4eba5 AM |
5650 | } |
5651 | } | |
5652 | } | |
5653 | ||
e310298c | 5654 | if (dynamic && add_needed) |
4ad4eba5 AM |
5655 | { |
5656 | /* Add this bfd to the loaded list. */ | |
5657 | struct elf_link_loaded_list *n; | |
5658 | ||
ca4be51c | 5659 | n = (struct elf_link_loaded_list *) bfd_alloc (abfd, sizeof (*n)); |
4ad4eba5 AM |
5660 | if (n == NULL) |
5661 | goto error_return; | |
5662 | n->abfd = abfd; | |
e310298c AM |
5663 | n->next = htab->dyn_loaded; |
5664 | htab->dyn_loaded = n; | |
4ad4eba5 | 5665 | } |
e310298c AM |
5666 | if (dynamic && !add_needed |
5667 | && (elf_dyn_lib_class (abfd) & DYN_DT_NEEDED) != 0) | |
5668 | elf_dyn_lib_class (abfd) |= DYN_NO_NEEDED; | |
4ad4eba5 AM |
5669 | |
5670 | return TRUE; | |
5671 | ||
5672 | error_free_vers: | |
c9594989 AM |
5673 | free (old_tab); |
5674 | free (old_strtab); | |
5675 | free (nondeflt_vers); | |
5676 | free (extversym); | |
4ad4eba5 | 5677 | error_free_sym: |
c9594989 | 5678 | free (isymbuf); |
4ad4eba5 AM |
5679 | error_return: |
5680 | return FALSE; | |
5681 | } | |
5682 | ||
8387904d AM |
5683 | /* Return the linker hash table entry of a symbol that might be |
5684 | satisfied by an archive symbol. Return -1 on error. */ | |
5685 | ||
5686 | struct elf_link_hash_entry * | |
5687 | _bfd_elf_archive_symbol_lookup (bfd *abfd, | |
5688 | struct bfd_link_info *info, | |
5689 | const char *name) | |
5690 | { | |
5691 | struct elf_link_hash_entry *h; | |
5692 | char *p, *copy; | |
5693 | size_t len, first; | |
5694 | ||
2a41f396 | 5695 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, TRUE); |
8387904d AM |
5696 | if (h != NULL) |
5697 | return h; | |
5698 | ||
5699 | /* If this is a default version (the name contains @@), look up the | |
5700 | symbol again with only one `@' as well as without the version. | |
5701 | The effect is that references to the symbol with and without the | |
5702 | version will be matched by the default symbol in the archive. */ | |
5703 | ||
5704 | p = strchr (name, ELF_VER_CHR); | |
5705 | if (p == NULL || p[1] != ELF_VER_CHR) | |
5706 | return h; | |
5707 | ||
5708 | /* First check with only one `@'. */ | |
5709 | len = strlen (name); | |
a50b1753 | 5710 | copy = (char *) bfd_alloc (abfd, len); |
8387904d | 5711 | if (copy == NULL) |
e99955cd | 5712 | return (struct elf_link_hash_entry *) -1; |
8387904d AM |
5713 | |
5714 | first = p - name + 1; | |
5715 | memcpy (copy, name, first); | |
5716 | memcpy (copy + first, name + first + 1, len - first); | |
5717 | ||
2a41f396 | 5718 | h = elf_link_hash_lookup (elf_hash_table (info), copy, FALSE, FALSE, TRUE); |
8387904d AM |
5719 | if (h == NULL) |
5720 | { | |
5721 | /* We also need to check references to the symbol without the | |
5722 | version. */ | |
5723 | copy[first - 1] = '\0'; | |
5724 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
2a41f396 | 5725 | FALSE, FALSE, TRUE); |
8387904d AM |
5726 | } |
5727 | ||
5728 | bfd_release (abfd, copy); | |
5729 | return h; | |
5730 | } | |
5731 | ||
0ad989f9 | 5732 | /* Add symbols from an ELF archive file to the linker hash table. We |
13e570f8 AM |
5733 | don't use _bfd_generic_link_add_archive_symbols because we need to |
5734 | handle versioned symbols. | |
0ad989f9 L |
5735 | |
5736 | Fortunately, ELF archive handling is simpler than that done by | |
5737 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
5738 | oddities. In ELF, if we find a symbol in the archive map, and the | |
5739 | symbol is currently undefined, we know that we must pull in that | |
5740 | object file. | |
5741 | ||
5742 | Unfortunately, we do have to make multiple passes over the symbol | |
5743 | table until nothing further is resolved. */ | |
5744 | ||
4ad4eba5 AM |
5745 | static bfd_boolean |
5746 | elf_link_add_archive_symbols (bfd *abfd, struct bfd_link_info *info) | |
0ad989f9 L |
5747 | { |
5748 | symindex c; | |
13e570f8 | 5749 | unsigned char *included = NULL; |
0ad989f9 L |
5750 | carsym *symdefs; |
5751 | bfd_boolean loop; | |
986f0783 | 5752 | size_t amt; |
8387904d AM |
5753 | const struct elf_backend_data *bed; |
5754 | struct elf_link_hash_entry * (*archive_symbol_lookup) | |
5755 | (bfd *, struct bfd_link_info *, const char *); | |
0ad989f9 L |
5756 | |
5757 | if (! bfd_has_map (abfd)) | |
5758 | { | |
5759 | /* An empty archive is a special case. */ | |
5760 | if (bfd_openr_next_archived_file (abfd, NULL) == NULL) | |
5761 | return TRUE; | |
5762 | bfd_set_error (bfd_error_no_armap); | |
5763 | return FALSE; | |
5764 | } | |
5765 | ||
5766 | /* Keep track of all symbols we know to be already defined, and all | |
5767 | files we know to be already included. This is to speed up the | |
5768 | second and subsequent passes. */ | |
5769 | c = bfd_ardata (abfd)->symdef_count; | |
5770 | if (c == 0) | |
5771 | return TRUE; | |
986f0783 | 5772 | amt = c * sizeof (*included); |
13e570f8 AM |
5773 | included = (unsigned char *) bfd_zmalloc (amt); |
5774 | if (included == NULL) | |
5775 | return FALSE; | |
0ad989f9 L |
5776 | |
5777 | symdefs = bfd_ardata (abfd)->symdefs; | |
8387904d AM |
5778 | bed = get_elf_backend_data (abfd); |
5779 | archive_symbol_lookup = bed->elf_backend_archive_symbol_lookup; | |
0ad989f9 L |
5780 | |
5781 | do | |
5782 | { | |
5783 | file_ptr last; | |
5784 | symindex i; | |
5785 | carsym *symdef; | |
5786 | carsym *symdefend; | |
5787 | ||
5788 | loop = FALSE; | |
5789 | last = -1; | |
5790 | ||
5791 | symdef = symdefs; | |
5792 | symdefend = symdef + c; | |
5793 | for (i = 0; symdef < symdefend; symdef++, i++) | |
5794 | { | |
5795 | struct elf_link_hash_entry *h; | |
5796 | bfd *element; | |
5797 | struct bfd_link_hash_entry *undefs_tail; | |
5798 | symindex mark; | |
5799 | ||
13e570f8 | 5800 | if (included[i]) |
0ad989f9 L |
5801 | continue; |
5802 | if (symdef->file_offset == last) | |
5803 | { | |
5804 | included[i] = TRUE; | |
5805 | continue; | |
5806 | } | |
5807 | ||
8387904d | 5808 | h = archive_symbol_lookup (abfd, info, symdef->name); |
e99955cd | 5809 | if (h == (struct elf_link_hash_entry *) -1) |
8387904d | 5810 | goto error_return; |
0ad989f9 L |
5811 | |
5812 | if (h == NULL) | |
5813 | continue; | |
5814 | ||
75cfe082 AM |
5815 | if (h->root.type == bfd_link_hash_undefined) |
5816 | { | |
5817 | /* If the archive element has already been loaded then one | |
5818 | of the symbols defined by that element might have been | |
5819 | made undefined due to being in a discarded section. */ | |
5820 | if (h->indx == -3) | |
5821 | continue; | |
5822 | } | |
5823 | else if (h->root.type == bfd_link_hash_common) | |
0ad989f9 L |
5824 | { |
5825 | /* We currently have a common symbol. The archive map contains | |
5826 | a reference to this symbol, so we may want to include it. We | |
5827 | only want to include it however, if this archive element | |
5828 | contains a definition of the symbol, not just another common | |
5829 | declaration of it. | |
5830 | ||
5831 | Unfortunately some archivers (including GNU ar) will put | |
5832 | declarations of common symbols into their archive maps, as | |
5833 | well as real definitions, so we cannot just go by the archive | |
5834 | map alone. Instead we must read in the element's symbol | |
5835 | table and check that to see what kind of symbol definition | |
5836 | this is. */ | |
5837 | if (! elf_link_is_defined_archive_symbol (abfd, symdef)) | |
5838 | continue; | |
5839 | } | |
75cfe082 | 5840 | else |
0ad989f9 L |
5841 | { |
5842 | if (h->root.type != bfd_link_hash_undefweak) | |
13e570f8 AM |
5843 | /* Symbol must be defined. Don't check it again. */ |
5844 | included[i] = TRUE; | |
0ad989f9 L |
5845 | continue; |
5846 | } | |
5847 | ||
5848 | /* We need to include this archive member. */ | |
5849 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
5850 | if (element == NULL) | |
5851 | goto error_return; | |
5852 | ||
5853 | if (! bfd_check_format (element, bfd_object)) | |
5854 | goto error_return; | |
5855 | ||
0ad989f9 L |
5856 | undefs_tail = info->hash->undefs_tail; |
5857 | ||
0e144ba7 AM |
5858 | if (!(*info->callbacks |
5859 | ->add_archive_element) (info, element, symdef->name, &element)) | |
b95a0a31 | 5860 | continue; |
0e144ba7 | 5861 | if (!bfd_link_add_symbols (element, info)) |
0ad989f9 L |
5862 | goto error_return; |
5863 | ||
5864 | /* If there are any new undefined symbols, we need to make | |
5865 | another pass through the archive in order to see whether | |
5866 | they can be defined. FIXME: This isn't perfect, because | |
5867 | common symbols wind up on undefs_tail and because an | |
5868 | undefined symbol which is defined later on in this pass | |
5869 | does not require another pass. This isn't a bug, but it | |
5870 | does make the code less efficient than it could be. */ | |
5871 | if (undefs_tail != info->hash->undefs_tail) | |
5872 | loop = TRUE; | |
5873 | ||
5874 | /* Look backward to mark all symbols from this object file | |
5875 | which we have already seen in this pass. */ | |
5876 | mark = i; | |
5877 | do | |
5878 | { | |
5879 | included[mark] = TRUE; | |
5880 | if (mark == 0) | |
5881 | break; | |
5882 | --mark; | |
5883 | } | |
5884 | while (symdefs[mark].file_offset == symdef->file_offset); | |
5885 | ||
5886 | /* We mark subsequent symbols from this object file as we go | |
5887 | on through the loop. */ | |
5888 | last = symdef->file_offset; | |
5889 | } | |
5890 | } | |
5891 | while (loop); | |
5892 | ||
0ad989f9 | 5893 | free (included); |
0ad989f9 L |
5894 | return TRUE; |
5895 | ||
5896 | error_return: | |
c9594989 | 5897 | free (included); |
0ad989f9 L |
5898 | return FALSE; |
5899 | } | |
4ad4eba5 AM |
5900 | |
5901 | /* Given an ELF BFD, add symbols to the global hash table as | |
5902 | appropriate. */ | |
5903 | ||
5904 | bfd_boolean | |
5905 | bfd_elf_link_add_symbols (bfd *abfd, struct bfd_link_info *info) | |
5906 | { | |
5907 | switch (bfd_get_format (abfd)) | |
5908 | { | |
5909 | case bfd_object: | |
5910 | return elf_link_add_object_symbols (abfd, info); | |
5911 | case bfd_archive: | |
5912 | return elf_link_add_archive_symbols (abfd, info); | |
5913 | default: | |
5914 | bfd_set_error (bfd_error_wrong_format); | |
5915 | return FALSE; | |
5916 | } | |
5917 | } | |
5a580b3a | 5918 | \f |
14b1c01e AM |
5919 | struct hash_codes_info |
5920 | { | |
5921 | unsigned long *hashcodes; | |
5922 | bfd_boolean error; | |
5923 | }; | |
a0c8462f | 5924 | |
5a580b3a AM |
5925 | /* This function will be called though elf_link_hash_traverse to store |
5926 | all hash value of the exported symbols in an array. */ | |
5927 | ||
5928 | static bfd_boolean | |
5929 | elf_collect_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5930 | { | |
a50b1753 | 5931 | struct hash_codes_info *inf = (struct hash_codes_info *) data; |
5a580b3a | 5932 | const char *name; |
5a580b3a AM |
5933 | unsigned long ha; |
5934 | char *alc = NULL; | |
5935 | ||
5a580b3a AM |
5936 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5937 | if (h->dynindx == -1) | |
5938 | return TRUE; | |
5939 | ||
5940 | name = h->root.root.string; | |
422f1182 | 5941 | if (h->versioned >= versioned) |
5a580b3a | 5942 | { |
422f1182 L |
5943 | char *p = strchr (name, ELF_VER_CHR); |
5944 | if (p != NULL) | |
14b1c01e | 5945 | { |
422f1182 L |
5946 | alc = (char *) bfd_malloc (p - name + 1); |
5947 | if (alc == NULL) | |
5948 | { | |
5949 | inf->error = TRUE; | |
5950 | return FALSE; | |
5951 | } | |
5952 | memcpy (alc, name, p - name); | |
5953 | alc[p - name] = '\0'; | |
5954 | name = alc; | |
14b1c01e | 5955 | } |
5a580b3a AM |
5956 | } |
5957 | ||
5958 | /* Compute the hash value. */ | |
5959 | ha = bfd_elf_hash (name); | |
5960 | ||
5961 | /* Store the found hash value in the array given as the argument. */ | |
14b1c01e | 5962 | *(inf->hashcodes)++ = ha; |
5a580b3a AM |
5963 | |
5964 | /* And store it in the struct so that we can put it in the hash table | |
5965 | later. */ | |
f6e332e6 | 5966 | h->u.elf_hash_value = ha; |
5a580b3a | 5967 | |
c9594989 | 5968 | free (alc); |
5a580b3a AM |
5969 | return TRUE; |
5970 | } | |
5971 | ||
fdc90cb4 JJ |
5972 | struct collect_gnu_hash_codes |
5973 | { | |
5974 | bfd *output_bfd; | |
5975 | const struct elf_backend_data *bed; | |
5976 | unsigned long int nsyms; | |
5977 | unsigned long int maskbits; | |
5978 | unsigned long int *hashcodes; | |
5979 | unsigned long int *hashval; | |
5980 | unsigned long int *indx; | |
5981 | unsigned long int *counts; | |
5982 | bfd_vma *bitmask; | |
5983 | bfd_byte *contents; | |
f16a9783 | 5984 | bfd_size_type xlat; |
fdc90cb4 JJ |
5985 | long int min_dynindx; |
5986 | unsigned long int bucketcount; | |
5987 | unsigned long int symindx; | |
5988 | long int local_indx; | |
5989 | long int shift1, shift2; | |
5990 | unsigned long int mask; | |
14b1c01e | 5991 | bfd_boolean error; |
fdc90cb4 JJ |
5992 | }; |
5993 | ||
5994 | /* This function will be called though elf_link_hash_traverse to store | |
5995 | all hash value of the exported symbols in an array. */ | |
5996 | ||
5997 | static bfd_boolean | |
5998 | elf_collect_gnu_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5999 | { | |
a50b1753 | 6000 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 | 6001 | const char *name; |
fdc90cb4 JJ |
6002 | unsigned long ha; |
6003 | char *alc = NULL; | |
6004 | ||
fdc90cb4 JJ |
6005 | /* Ignore indirect symbols. These are added by the versioning code. */ |
6006 | if (h->dynindx == -1) | |
6007 | return TRUE; | |
6008 | ||
6009 | /* Ignore also local symbols and undefined symbols. */ | |
6010 | if (! (*s->bed->elf_hash_symbol) (h)) | |
6011 | return TRUE; | |
6012 | ||
6013 | name = h->root.root.string; | |
422f1182 | 6014 | if (h->versioned >= versioned) |
fdc90cb4 | 6015 | { |
422f1182 L |
6016 | char *p = strchr (name, ELF_VER_CHR); |
6017 | if (p != NULL) | |
14b1c01e | 6018 | { |
422f1182 L |
6019 | alc = (char *) bfd_malloc (p - name + 1); |
6020 | if (alc == NULL) | |
6021 | { | |
6022 | s->error = TRUE; | |
6023 | return FALSE; | |
6024 | } | |
6025 | memcpy (alc, name, p - name); | |
6026 | alc[p - name] = '\0'; | |
6027 | name = alc; | |
14b1c01e | 6028 | } |
fdc90cb4 JJ |
6029 | } |
6030 | ||
6031 | /* Compute the hash value. */ | |
6032 | ha = bfd_elf_gnu_hash (name); | |
6033 | ||
6034 | /* Store the found hash value in the array for compute_bucket_count, | |
6035 | and also for .dynsym reordering purposes. */ | |
6036 | s->hashcodes[s->nsyms] = ha; | |
6037 | s->hashval[h->dynindx] = ha; | |
6038 | ++s->nsyms; | |
6039 | if (s->min_dynindx < 0 || s->min_dynindx > h->dynindx) | |
6040 | s->min_dynindx = h->dynindx; | |
6041 | ||
c9594989 | 6042 | free (alc); |
fdc90cb4 JJ |
6043 | return TRUE; |
6044 | } | |
6045 | ||
6046 | /* This function will be called though elf_link_hash_traverse to do | |
f16a9783 MS |
6047 | final dynamic symbol renumbering in case of .gnu.hash. |
6048 | If using .MIPS.xhash, invoke record_xhash_symbol to add symbol index | |
6049 | to the translation table. */ | |
fdc90cb4 JJ |
6050 | |
6051 | static bfd_boolean | |
f16a9783 | 6052 | elf_gnu_hash_process_symidx (struct elf_link_hash_entry *h, void *data) |
fdc90cb4 | 6053 | { |
a50b1753 | 6054 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 JJ |
6055 | unsigned long int bucket; |
6056 | unsigned long int val; | |
6057 | ||
fdc90cb4 JJ |
6058 | /* Ignore indirect symbols. */ |
6059 | if (h->dynindx == -1) | |
6060 | return TRUE; | |
6061 | ||
6062 | /* Ignore also local symbols and undefined symbols. */ | |
6063 | if (! (*s->bed->elf_hash_symbol) (h)) | |
6064 | { | |
6065 | if (h->dynindx >= s->min_dynindx) | |
f16a9783 MS |
6066 | { |
6067 | if (s->bed->record_xhash_symbol != NULL) | |
6068 | { | |
6069 | (*s->bed->record_xhash_symbol) (h, 0); | |
6070 | s->local_indx++; | |
6071 | } | |
6072 | else | |
6073 | h->dynindx = s->local_indx++; | |
6074 | } | |
fdc90cb4 JJ |
6075 | return TRUE; |
6076 | } | |
6077 | ||
6078 | bucket = s->hashval[h->dynindx] % s->bucketcount; | |
6079 | val = (s->hashval[h->dynindx] >> s->shift1) | |
6080 | & ((s->maskbits >> s->shift1) - 1); | |
6081 | s->bitmask[val] |= ((bfd_vma) 1) << (s->hashval[h->dynindx] & s->mask); | |
6082 | s->bitmask[val] | |
6083 | |= ((bfd_vma) 1) << ((s->hashval[h->dynindx] >> s->shift2) & s->mask); | |
6084 | val = s->hashval[h->dynindx] & ~(unsigned long int) 1; | |
6085 | if (s->counts[bucket] == 1) | |
6086 | /* Last element terminates the chain. */ | |
6087 | val |= 1; | |
6088 | bfd_put_32 (s->output_bfd, val, | |
6089 | s->contents + (s->indx[bucket] - s->symindx) * 4); | |
6090 | --s->counts[bucket]; | |
f16a9783 MS |
6091 | if (s->bed->record_xhash_symbol != NULL) |
6092 | { | |
6093 | bfd_vma xlat_loc = s->xlat + (s->indx[bucket]++ - s->symindx) * 4; | |
6094 | ||
6095 | (*s->bed->record_xhash_symbol) (h, xlat_loc); | |
6096 | } | |
6097 | else | |
6098 | h->dynindx = s->indx[bucket]++; | |
fdc90cb4 JJ |
6099 | return TRUE; |
6100 | } | |
6101 | ||
6102 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ | |
6103 | ||
6104 | bfd_boolean | |
6105 | _bfd_elf_hash_symbol (struct elf_link_hash_entry *h) | |
6106 | { | |
6107 | return !(h->forced_local | |
6108 | || h->root.type == bfd_link_hash_undefined | |
6109 | || h->root.type == bfd_link_hash_undefweak | |
6110 | || ((h->root.type == bfd_link_hash_defined | |
6111 | || h->root.type == bfd_link_hash_defweak) | |
6112 | && h->root.u.def.section->output_section == NULL)); | |
6113 | } | |
6114 | ||
5a580b3a AM |
6115 | /* Array used to determine the number of hash table buckets to use |
6116 | based on the number of symbols there are. If there are fewer than | |
6117 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
6118 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
6119 | than 32771 buckets. */ | |
6120 | ||
6121 | static const size_t elf_buckets[] = | |
6122 | { | |
6123 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
6124 | 16411, 32771, 0 | |
6125 | }; | |
6126 | ||
6127 | /* Compute bucket count for hashing table. We do not use a static set | |
6128 | of possible tables sizes anymore. Instead we determine for all | |
6129 | possible reasonable sizes of the table the outcome (i.e., the | |
6130 | number of collisions etc) and choose the best solution. The | |
6131 | weighting functions are not too simple to allow the table to grow | |
6132 | without bounds. Instead one of the weighting factors is the size. | |
6133 | Therefore the result is always a good payoff between few collisions | |
6134 | (= short chain lengths) and table size. */ | |
6135 | static size_t | |
b20dd2ce | 6136 | compute_bucket_count (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
d40f3da9 AM |
6137 | unsigned long int *hashcodes ATTRIBUTE_UNUSED, |
6138 | unsigned long int nsyms, | |
6139 | int gnu_hash) | |
5a580b3a | 6140 | { |
5a580b3a | 6141 | size_t best_size = 0; |
5a580b3a | 6142 | unsigned long int i; |
5a580b3a | 6143 | |
5a580b3a AM |
6144 | /* We have a problem here. The following code to optimize the table |
6145 | size requires an integer type with more the 32 bits. If | |
6146 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
6147 | #ifdef BFD_HOST_U_64_BIT | |
6148 | if (info->optimize) | |
6149 | { | |
5a580b3a AM |
6150 | size_t minsize; |
6151 | size_t maxsize; | |
6152 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
5a580b3a | 6153 | bfd *dynobj = elf_hash_table (info)->dynobj; |
d40f3da9 | 6154 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; |
5a580b3a | 6155 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); |
fdc90cb4 | 6156 | unsigned long int *counts; |
d40f3da9 | 6157 | bfd_size_type amt; |
0883b6e0 | 6158 | unsigned int no_improvement_count = 0; |
5a580b3a AM |
6159 | |
6160 | /* Possible optimization parameters: if we have NSYMS symbols we say | |
6161 | that the hashing table must at least have NSYMS/4 and at most | |
6162 | 2*NSYMS buckets. */ | |
6163 | minsize = nsyms / 4; | |
6164 | if (minsize == 0) | |
6165 | minsize = 1; | |
6166 | best_size = maxsize = nsyms * 2; | |
fdc90cb4 JJ |
6167 | if (gnu_hash) |
6168 | { | |
6169 | if (minsize < 2) | |
6170 | minsize = 2; | |
6171 | if ((best_size & 31) == 0) | |
6172 | ++best_size; | |
6173 | } | |
5a580b3a AM |
6174 | |
6175 | /* Create array where we count the collisions in. We must use bfd_malloc | |
6176 | since the size could be large. */ | |
6177 | amt = maxsize; | |
6178 | amt *= sizeof (unsigned long int); | |
a50b1753 | 6179 | counts = (unsigned long int *) bfd_malloc (amt); |
5a580b3a | 6180 | if (counts == NULL) |
fdc90cb4 | 6181 | return 0; |
5a580b3a AM |
6182 | |
6183 | /* Compute the "optimal" size for the hash table. The criteria is a | |
6184 | minimal chain length. The minor criteria is (of course) the size | |
6185 | of the table. */ | |
6186 | for (i = minsize; i < maxsize; ++i) | |
6187 | { | |
6188 | /* Walk through the array of hashcodes and count the collisions. */ | |
6189 | BFD_HOST_U_64_BIT max; | |
6190 | unsigned long int j; | |
6191 | unsigned long int fact; | |
6192 | ||
fdc90cb4 JJ |
6193 | if (gnu_hash && (i & 31) == 0) |
6194 | continue; | |
6195 | ||
5a580b3a AM |
6196 | memset (counts, '\0', i * sizeof (unsigned long int)); |
6197 | ||
6198 | /* Determine how often each hash bucket is used. */ | |
6199 | for (j = 0; j < nsyms; ++j) | |
6200 | ++counts[hashcodes[j] % i]; | |
6201 | ||
6202 | /* For the weight function we need some information about the | |
6203 | pagesize on the target. This is information need not be 100% | |
6204 | accurate. Since this information is not available (so far) we | |
6205 | define it here to a reasonable default value. If it is crucial | |
6206 | to have a better value some day simply define this value. */ | |
6207 | # ifndef BFD_TARGET_PAGESIZE | |
6208 | # define BFD_TARGET_PAGESIZE (4096) | |
6209 | # endif | |
6210 | ||
fdc90cb4 JJ |
6211 | /* We in any case need 2 + DYNSYMCOUNT entries for the size values |
6212 | and the chains. */ | |
6213 | max = (2 + dynsymcount) * bed->s->sizeof_hash_entry; | |
5a580b3a AM |
6214 | |
6215 | # if 1 | |
6216 | /* Variant 1: optimize for short chains. We add the squares | |
6217 | of all the chain lengths (which favors many small chain | |
6218 | over a few long chains). */ | |
6219 | for (j = 0; j < i; ++j) | |
6220 | max += counts[j] * counts[j]; | |
6221 | ||
6222 | /* This adds penalties for the overall size of the table. */ | |
fdc90cb4 | 6223 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
6224 | max *= fact * fact; |
6225 | # else | |
6226 | /* Variant 2: Optimize a lot more for small table. Here we | |
6227 | also add squares of the size but we also add penalties for | |
6228 | empty slots (the +1 term). */ | |
6229 | for (j = 0; j < i; ++j) | |
6230 | max += (1 + counts[j]) * (1 + counts[j]); | |
6231 | ||
6232 | /* The overall size of the table is considered, but not as | |
6233 | strong as in variant 1, where it is squared. */ | |
fdc90cb4 | 6234 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
6235 | max *= fact; |
6236 | # endif | |
6237 | ||
6238 | /* Compare with current best results. */ | |
6239 | if (max < best_chlen) | |
6240 | { | |
6241 | best_chlen = max; | |
6242 | best_size = i; | |
ca4be51c | 6243 | no_improvement_count = 0; |
5a580b3a | 6244 | } |
0883b6e0 NC |
6245 | /* PR 11843: Avoid futile long searches for the best bucket size |
6246 | when there are a large number of symbols. */ | |
6247 | else if (++no_improvement_count == 100) | |
6248 | break; | |
5a580b3a AM |
6249 | } |
6250 | ||
6251 | free (counts); | |
6252 | } | |
6253 | else | |
6254 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
6255 | { | |
6256 | /* This is the fallback solution if no 64bit type is available or if we | |
6257 | are not supposed to spend much time on optimizations. We select the | |
6258 | bucket count using a fixed set of numbers. */ | |
6259 | for (i = 0; elf_buckets[i] != 0; i++) | |
6260 | { | |
6261 | best_size = elf_buckets[i]; | |
fdc90cb4 | 6262 | if (nsyms < elf_buckets[i + 1]) |
5a580b3a AM |
6263 | break; |
6264 | } | |
fdc90cb4 JJ |
6265 | if (gnu_hash && best_size < 2) |
6266 | best_size = 2; | |
5a580b3a AM |
6267 | } |
6268 | ||
5a580b3a AM |
6269 | return best_size; |
6270 | } | |
6271 | ||
d0bf826b AM |
6272 | /* Size any SHT_GROUP section for ld -r. */ |
6273 | ||
6274 | bfd_boolean | |
6275 | _bfd_elf_size_group_sections (struct bfd_link_info *info) | |
6276 | { | |
6277 | bfd *ibfd; | |
57963c05 | 6278 | asection *s; |
d0bf826b | 6279 | |
c72f2fb2 | 6280 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
d0bf826b | 6281 | if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour |
57963c05 AM |
6282 | && (s = ibfd->sections) != NULL |
6283 | && s->sec_info_type != SEC_INFO_TYPE_JUST_SYMS | |
d0bf826b AM |
6284 | && !_bfd_elf_fixup_group_sections (ibfd, bfd_abs_section_ptr)) |
6285 | return FALSE; | |
6286 | return TRUE; | |
6287 | } | |
6288 | ||
04c3a755 NS |
6289 | /* Set a default stack segment size. The value in INFO wins. If it |
6290 | is unset, LEGACY_SYMBOL's value is used, and if that symbol is | |
6291 | undefined it is initialized. */ | |
6292 | ||
6293 | bfd_boolean | |
6294 | bfd_elf_stack_segment_size (bfd *output_bfd, | |
6295 | struct bfd_link_info *info, | |
6296 | const char *legacy_symbol, | |
6297 | bfd_vma default_size) | |
6298 | { | |
6299 | struct elf_link_hash_entry *h = NULL; | |
6300 | ||
6301 | /* Look for legacy symbol. */ | |
6302 | if (legacy_symbol) | |
6303 | h = elf_link_hash_lookup (elf_hash_table (info), legacy_symbol, | |
6304 | FALSE, FALSE, FALSE); | |
6305 | if (h && (h->root.type == bfd_link_hash_defined | |
6306 | || h->root.type == bfd_link_hash_defweak) | |
6307 | && h->def_regular | |
6308 | && (h->type == STT_NOTYPE || h->type == STT_OBJECT)) | |
6309 | { | |
6310 | /* The symbol has no type if specified on the command line. */ | |
6311 | h->type = STT_OBJECT; | |
6312 | if (info->stacksize) | |
695344c0 | 6313 | /* xgettext:c-format */ |
871b3ab2 | 6314 | _bfd_error_handler (_("%pB: stack size specified and %s set"), |
4eca0228 | 6315 | output_bfd, legacy_symbol); |
04c3a755 | 6316 | else if (h->root.u.def.section != bfd_abs_section_ptr) |
695344c0 | 6317 | /* xgettext:c-format */ |
871b3ab2 | 6318 | _bfd_error_handler (_("%pB: %s not absolute"), |
4eca0228 | 6319 | output_bfd, legacy_symbol); |
04c3a755 NS |
6320 | else |
6321 | info->stacksize = h->root.u.def.value; | |
6322 | } | |
6323 | ||
6324 | if (!info->stacksize) | |
6325 | /* If the user didn't set a size, or explicitly inhibit the | |
6326 | size, set it now. */ | |
6327 | info->stacksize = default_size; | |
6328 | ||
6329 | /* Provide the legacy symbol, if it is referenced. */ | |
6330 | if (h && (h->root.type == bfd_link_hash_undefined | |
6331 | || h->root.type == bfd_link_hash_undefweak)) | |
6332 | { | |
6333 | struct bfd_link_hash_entry *bh = NULL; | |
6334 | ||
6335 | if (!(_bfd_generic_link_add_one_symbol | |
6336 | (info, output_bfd, legacy_symbol, | |
6337 | BSF_GLOBAL, bfd_abs_section_ptr, | |
6338 | info->stacksize >= 0 ? info->stacksize : 0, | |
6339 | NULL, FALSE, get_elf_backend_data (output_bfd)->collect, &bh))) | |
6340 | return FALSE; | |
6341 | ||
6342 | h = (struct elf_link_hash_entry *) bh; | |
6343 | h->def_regular = 1; | |
6344 | h->type = STT_OBJECT; | |
6345 | } | |
6346 | ||
6347 | return TRUE; | |
6348 | } | |
6349 | ||
b531344c MR |
6350 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ |
6351 | ||
6352 | struct elf_gc_sweep_symbol_info | |
6353 | { | |
6354 | struct bfd_link_info *info; | |
6355 | void (*hide_symbol) (struct bfd_link_info *, struct elf_link_hash_entry *, | |
6356 | bfd_boolean); | |
6357 | }; | |
6358 | ||
6359 | static bfd_boolean | |
6360 | elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *data) | |
6361 | { | |
6362 | if (!h->mark | |
6363 | && (((h->root.type == bfd_link_hash_defined | |
6364 | || h->root.type == bfd_link_hash_defweak) | |
6365 | && !((h->def_regular || ELF_COMMON_DEF_P (h)) | |
6366 | && h->root.u.def.section->gc_mark)) | |
6367 | || h->root.type == bfd_link_hash_undefined | |
6368 | || h->root.type == bfd_link_hash_undefweak)) | |
6369 | { | |
6370 | struct elf_gc_sweep_symbol_info *inf; | |
6371 | ||
6372 | inf = (struct elf_gc_sweep_symbol_info *) data; | |
6373 | (*inf->hide_symbol) (inf->info, h, TRUE); | |
6374 | h->def_regular = 0; | |
6375 | h->ref_regular = 0; | |
6376 | h->ref_regular_nonweak = 0; | |
6377 | } | |
6378 | ||
6379 | return TRUE; | |
6380 | } | |
6381 | ||
5a580b3a AM |
6382 | /* Set up the sizes and contents of the ELF dynamic sections. This is |
6383 | called by the ELF linker emulation before_allocation routine. We | |
6384 | must set the sizes of the sections before the linker sets the | |
6385 | addresses of the various sections. */ | |
6386 | ||
6387 | bfd_boolean | |
6388 | bfd_elf_size_dynamic_sections (bfd *output_bfd, | |
6389 | const char *soname, | |
6390 | const char *rpath, | |
6391 | const char *filter_shlib, | |
7ee314fa AM |
6392 | const char *audit, |
6393 | const char *depaudit, | |
5a580b3a AM |
6394 | const char * const *auxiliary_filters, |
6395 | struct bfd_link_info *info, | |
fd91d419 | 6396 | asection **sinterpptr) |
5a580b3a | 6397 | { |
5a580b3a AM |
6398 | bfd *dynobj; |
6399 | const struct elf_backend_data *bed; | |
5a580b3a AM |
6400 | |
6401 | *sinterpptr = NULL; | |
6402 | ||
5a580b3a AM |
6403 | if (!is_elf_hash_table (info->hash)) |
6404 | return TRUE; | |
6405 | ||
5a580b3a AM |
6406 | dynobj = elf_hash_table (info)->dynobj; |
6407 | ||
9a2a56cc | 6408 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) |
5a580b3a | 6409 | { |
902e9fc7 MR |
6410 | struct bfd_elf_version_tree *verdefs; |
6411 | struct elf_info_failed asvinfo; | |
5a580b3a AM |
6412 | struct bfd_elf_version_tree *t; |
6413 | struct bfd_elf_version_expr *d; | |
902e9fc7 | 6414 | asection *s; |
e6699019 | 6415 | size_t soname_indx; |
7ee314fa | 6416 | |
5a580b3a AM |
6417 | /* If we are supposed to export all symbols into the dynamic symbol |
6418 | table (this is not the normal case), then do so. */ | |
55255dae | 6419 | if (info->export_dynamic |
0e1862bb | 6420 | || (bfd_link_executable (info) && info->dynamic)) |
5a580b3a | 6421 | { |
3d13f3e9 AM |
6422 | struct elf_info_failed eif; |
6423 | ||
6424 | eif.info = info; | |
6425 | eif.failed = FALSE; | |
5a580b3a AM |
6426 | elf_link_hash_traverse (elf_hash_table (info), |
6427 | _bfd_elf_export_symbol, | |
6428 | &eif); | |
6429 | if (eif.failed) | |
6430 | return FALSE; | |
6431 | } | |
6432 | ||
e6699019 L |
6433 | if (soname != NULL) |
6434 | { | |
6435 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6436 | soname, TRUE); | |
6437 | if (soname_indx == (size_t) -1 | |
6438 | || !_bfd_elf_add_dynamic_entry (info, DT_SONAME, soname_indx)) | |
6439 | return FALSE; | |
6440 | } | |
6441 | else | |
6442 | soname_indx = (size_t) -1; | |
6443 | ||
5a580b3a | 6444 | /* Make all global versions with definition. */ |
fd91d419 | 6445 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 6446 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 6447 | if (!d->symver && d->literal) |
5a580b3a AM |
6448 | { |
6449 | const char *verstr, *name; | |
6450 | size_t namelen, verlen, newlen; | |
93252b1c | 6451 | char *newname, *p, leading_char; |
5a580b3a AM |
6452 | struct elf_link_hash_entry *newh; |
6453 | ||
93252b1c | 6454 | leading_char = bfd_get_symbol_leading_char (output_bfd); |
ae5a3597 | 6455 | name = d->pattern; |
93252b1c | 6456 | namelen = strlen (name) + (leading_char != '\0'); |
5a580b3a AM |
6457 | verstr = t->name; |
6458 | verlen = strlen (verstr); | |
6459 | newlen = namelen + verlen + 3; | |
6460 | ||
a50b1753 | 6461 | newname = (char *) bfd_malloc (newlen); |
5a580b3a AM |
6462 | if (newname == NULL) |
6463 | return FALSE; | |
93252b1c MF |
6464 | newname[0] = leading_char; |
6465 | memcpy (newname + (leading_char != '\0'), name, namelen); | |
5a580b3a AM |
6466 | |
6467 | /* Check the hidden versioned definition. */ | |
6468 | p = newname + namelen; | |
6469 | *p++ = ELF_VER_CHR; | |
6470 | memcpy (p, verstr, verlen + 1); | |
6471 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
6472 | newname, FALSE, FALSE, | |
6473 | FALSE); | |
6474 | if (newh == NULL | |
6475 | || (newh->root.type != bfd_link_hash_defined | |
6476 | && newh->root.type != bfd_link_hash_defweak)) | |
6477 | { | |
6478 | /* Check the default versioned definition. */ | |
6479 | *p++ = ELF_VER_CHR; | |
6480 | memcpy (p, verstr, verlen + 1); | |
6481 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
6482 | newname, FALSE, FALSE, | |
6483 | FALSE); | |
6484 | } | |
6485 | free (newname); | |
6486 | ||
6487 | /* Mark this version if there is a definition and it is | |
6488 | not defined in a shared object. */ | |
6489 | if (newh != NULL | |
f5385ebf | 6490 | && !newh->def_dynamic |
5a580b3a AM |
6491 | && (newh->root.type == bfd_link_hash_defined |
6492 | || newh->root.type == bfd_link_hash_defweak)) | |
6493 | d->symver = 1; | |
6494 | } | |
6495 | ||
6496 | /* Attach all the symbols to their version information. */ | |
5a580b3a | 6497 | asvinfo.info = info; |
5a580b3a AM |
6498 | asvinfo.failed = FALSE; |
6499 | ||
6500 | elf_link_hash_traverse (elf_hash_table (info), | |
6501 | _bfd_elf_link_assign_sym_version, | |
6502 | &asvinfo); | |
6503 | if (asvinfo.failed) | |
6504 | return FALSE; | |
6505 | ||
6506 | if (!info->allow_undefined_version) | |
6507 | { | |
6508 | /* Check if all global versions have a definition. */ | |
3d13f3e9 | 6509 | bfd_boolean all_defined = TRUE; |
fd91d419 | 6510 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 6511 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 6512 | if (d->literal && !d->symver && !d->script) |
5a580b3a | 6513 | { |
4eca0228 | 6514 | _bfd_error_handler |
5a580b3a AM |
6515 | (_("%s: undefined version: %s"), |
6516 | d->pattern, t->name); | |
6517 | all_defined = FALSE; | |
6518 | } | |
6519 | ||
6520 | if (!all_defined) | |
6521 | { | |
6522 | bfd_set_error (bfd_error_bad_value); | |
6523 | return FALSE; | |
6524 | } | |
6525 | } | |
6526 | ||
902e9fc7 MR |
6527 | /* Set up the version definition section. */ |
6528 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); | |
6529 | BFD_ASSERT (s != NULL); | |
5a580b3a | 6530 | |
902e9fc7 MR |
6531 | /* We may have created additional version definitions if we are |
6532 | just linking a regular application. */ | |
6533 | verdefs = info->version_info; | |
5a580b3a | 6534 | |
902e9fc7 MR |
6535 | /* Skip anonymous version tag. */ |
6536 | if (verdefs != NULL && verdefs->vernum == 0) | |
6537 | verdefs = verdefs->next; | |
5a580b3a | 6538 | |
902e9fc7 MR |
6539 | if (verdefs == NULL && !info->create_default_symver) |
6540 | s->flags |= SEC_EXCLUDE; | |
6541 | else | |
5a580b3a | 6542 | { |
902e9fc7 MR |
6543 | unsigned int cdefs; |
6544 | bfd_size_type size; | |
6545 | bfd_byte *p; | |
6546 | Elf_Internal_Verdef def; | |
6547 | Elf_Internal_Verdaux defaux; | |
6548 | struct bfd_link_hash_entry *bh; | |
6549 | struct elf_link_hash_entry *h; | |
6550 | const char *name; | |
5a580b3a | 6551 | |
902e9fc7 MR |
6552 | cdefs = 0; |
6553 | size = 0; | |
5a580b3a | 6554 | |
902e9fc7 MR |
6555 | /* Make space for the base version. */ |
6556 | size += sizeof (Elf_External_Verdef); | |
6557 | size += sizeof (Elf_External_Verdaux); | |
6558 | ++cdefs; | |
6559 | ||
6560 | /* Make space for the default version. */ | |
6561 | if (info->create_default_symver) | |
6562 | { | |
6563 | size += sizeof (Elf_External_Verdef); | |
6564 | ++cdefs; | |
3e3b46e5 PB |
6565 | } |
6566 | ||
5a580b3a AM |
6567 | for (t = verdefs; t != NULL; t = t->next) |
6568 | { | |
6569 | struct bfd_elf_version_deps *n; | |
6570 | ||
a6cc6b3b RO |
6571 | /* Don't emit base version twice. */ |
6572 | if (t->vernum == 0) | |
6573 | continue; | |
6574 | ||
5a580b3a AM |
6575 | size += sizeof (Elf_External_Verdef); |
6576 | size += sizeof (Elf_External_Verdaux); | |
6577 | ++cdefs; | |
6578 | ||
6579 | for (n = t->deps; n != NULL; n = n->next) | |
6580 | size += sizeof (Elf_External_Verdaux); | |
6581 | } | |
6582 | ||
eea6121a | 6583 | s->size = size; |
a50b1753 | 6584 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
eea6121a | 6585 | if (s->contents == NULL && s->size != 0) |
5a580b3a AM |
6586 | return FALSE; |
6587 | ||
6588 | /* Fill in the version definition section. */ | |
6589 | ||
6590 | p = s->contents; | |
6591 | ||
6592 | def.vd_version = VER_DEF_CURRENT; | |
6593 | def.vd_flags = VER_FLG_BASE; | |
6594 | def.vd_ndx = 1; | |
6595 | def.vd_cnt = 1; | |
3e3b46e5 PB |
6596 | if (info->create_default_symver) |
6597 | { | |
6598 | def.vd_aux = 2 * sizeof (Elf_External_Verdef); | |
6599 | def.vd_next = sizeof (Elf_External_Verdef); | |
6600 | } | |
6601 | else | |
6602 | { | |
6603 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6604 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6605 | + sizeof (Elf_External_Verdaux)); | |
6606 | } | |
5a580b3a | 6607 | |
ef53be89 | 6608 | if (soname_indx != (size_t) -1) |
5a580b3a AM |
6609 | { |
6610 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6611 | soname_indx); | |
6612 | def.vd_hash = bfd_elf_hash (soname); | |
6613 | defaux.vda_name = soname_indx; | |
3e3b46e5 | 6614 | name = soname; |
5a580b3a AM |
6615 | } |
6616 | else | |
6617 | { | |
ef53be89 | 6618 | size_t indx; |
5a580b3a | 6619 | |
765cf5f6 | 6620 | name = lbasename (bfd_get_filename (output_bfd)); |
5a580b3a AM |
6621 | def.vd_hash = bfd_elf_hash (name); |
6622 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6623 | name, FALSE); | |
ef53be89 | 6624 | if (indx == (size_t) -1) |
5a580b3a AM |
6625 | return FALSE; |
6626 | defaux.vda_name = indx; | |
6627 | } | |
6628 | defaux.vda_next = 0; | |
6629 | ||
6630 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6631 | (Elf_External_Verdef *) p); | |
6632 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
6633 | if (info->create_default_symver) |
6634 | { | |
6635 | /* Add a symbol representing this version. */ | |
6636 | bh = NULL; | |
6637 | if (! (_bfd_generic_link_add_one_symbol | |
6638 | (info, dynobj, name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6639 | 0, NULL, FALSE, | |
6640 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6641 | return FALSE; | |
6642 | h = (struct elf_link_hash_entry *) bh; | |
6643 | h->non_elf = 0; | |
6644 | h->def_regular = 1; | |
6645 | h->type = STT_OBJECT; | |
6646 | h->verinfo.vertree = NULL; | |
6647 | ||
6648 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
6649 | return FALSE; | |
6650 | ||
6651 | /* Create a duplicate of the base version with the same | |
6652 | aux block, but different flags. */ | |
6653 | def.vd_flags = 0; | |
6654 | def.vd_ndx = 2; | |
6655 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6656 | if (verdefs) | |
6657 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6658 | + sizeof (Elf_External_Verdaux)); | |
6659 | else | |
6660 | def.vd_next = 0; | |
6661 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6662 | (Elf_External_Verdef *) p); | |
6663 | p += sizeof (Elf_External_Verdef); | |
6664 | } | |
5a580b3a AM |
6665 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, |
6666 | (Elf_External_Verdaux *) p); | |
6667 | p += sizeof (Elf_External_Verdaux); | |
6668 | ||
6669 | for (t = verdefs; t != NULL; t = t->next) | |
6670 | { | |
6671 | unsigned int cdeps; | |
6672 | struct bfd_elf_version_deps *n; | |
5a580b3a | 6673 | |
a6cc6b3b RO |
6674 | /* Don't emit the base version twice. */ |
6675 | if (t->vernum == 0) | |
6676 | continue; | |
6677 | ||
5a580b3a AM |
6678 | cdeps = 0; |
6679 | for (n = t->deps; n != NULL; n = n->next) | |
6680 | ++cdeps; | |
6681 | ||
6682 | /* Add a symbol representing this version. */ | |
6683 | bh = NULL; | |
6684 | if (! (_bfd_generic_link_add_one_symbol | |
6685 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6686 | 0, NULL, FALSE, | |
6687 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6688 | return FALSE; | |
6689 | h = (struct elf_link_hash_entry *) bh; | |
f5385ebf AM |
6690 | h->non_elf = 0; |
6691 | h->def_regular = 1; | |
5a580b3a AM |
6692 | h->type = STT_OBJECT; |
6693 | h->verinfo.vertree = t; | |
6694 | ||
c152c796 | 6695 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
5a580b3a AM |
6696 | return FALSE; |
6697 | ||
6698 | def.vd_version = VER_DEF_CURRENT; | |
6699 | def.vd_flags = 0; | |
6700 | if (t->globals.list == NULL | |
6701 | && t->locals.list == NULL | |
6702 | && ! t->used) | |
6703 | def.vd_flags |= VER_FLG_WEAK; | |
3e3b46e5 | 6704 | def.vd_ndx = t->vernum + (info->create_default_symver ? 2 : 1); |
5a580b3a AM |
6705 | def.vd_cnt = cdeps + 1; |
6706 | def.vd_hash = bfd_elf_hash (t->name); | |
6707 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6708 | def.vd_next = 0; | |
a6cc6b3b RO |
6709 | |
6710 | /* If a basever node is next, it *must* be the last node in | |
6711 | the chain, otherwise Verdef construction breaks. */ | |
6712 | if (t->next != NULL && t->next->vernum == 0) | |
6713 | BFD_ASSERT (t->next->next == NULL); | |
6714 | ||
6715 | if (t->next != NULL && t->next->vernum != 0) | |
5a580b3a AM |
6716 | def.vd_next = (sizeof (Elf_External_Verdef) |
6717 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
6718 | ||
6719 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6720 | (Elf_External_Verdef *) p); | |
6721 | p += sizeof (Elf_External_Verdef); | |
6722 | ||
6723 | defaux.vda_name = h->dynstr_index; | |
6724 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6725 | h->dynstr_index); | |
6726 | defaux.vda_next = 0; | |
6727 | if (t->deps != NULL) | |
6728 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6729 | t->name_indx = defaux.vda_name; | |
6730 | ||
6731 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6732 | (Elf_External_Verdaux *) p); | |
6733 | p += sizeof (Elf_External_Verdaux); | |
6734 | ||
6735 | for (n = t->deps; n != NULL; n = n->next) | |
6736 | { | |
6737 | if (n->version_needed == NULL) | |
6738 | { | |
6739 | /* This can happen if there was an error in the | |
6740 | version script. */ | |
6741 | defaux.vda_name = 0; | |
6742 | } | |
6743 | else | |
6744 | { | |
6745 | defaux.vda_name = n->version_needed->name_indx; | |
6746 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6747 | defaux.vda_name); | |
6748 | } | |
6749 | if (n->next == NULL) | |
6750 | defaux.vda_next = 0; | |
6751 | else | |
6752 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6753 | ||
6754 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6755 | (Elf_External_Verdaux *) p); | |
6756 | p += sizeof (Elf_External_Verdaux); | |
6757 | } | |
6758 | } | |
6759 | ||
5a580b3a AM |
6760 | elf_tdata (output_bfd)->cverdefs = cdefs; |
6761 | } | |
902e9fc7 MR |
6762 | } |
6763 | ||
6764 | bed = get_elf_backend_data (output_bfd); | |
6765 | ||
6766 | if (info->gc_sections && bed->can_gc_sections) | |
6767 | { | |
6768 | struct elf_gc_sweep_symbol_info sweep_info; | |
902e9fc7 MR |
6769 | |
6770 | /* Remove the symbols that were in the swept sections from the | |
3d13f3e9 | 6771 | dynamic symbol table. */ |
902e9fc7 MR |
6772 | sweep_info.info = info; |
6773 | sweep_info.hide_symbol = bed->elf_backend_hide_symbol; | |
6774 | elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol, | |
6775 | &sweep_info); | |
3d13f3e9 AM |
6776 | } |
6777 | ||
6778 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) | |
6779 | { | |
6780 | asection *s; | |
6781 | struct elf_find_verdep_info sinfo; | |
6782 | ||
6783 | /* Work out the size of the version reference section. */ | |
6784 | ||
6785 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); | |
6786 | BFD_ASSERT (s != NULL); | |
902e9fc7 | 6787 | |
3d13f3e9 AM |
6788 | sinfo.info = info; |
6789 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
6790 | if (sinfo.vers == 0) | |
6791 | sinfo.vers = 1; | |
6792 | sinfo.failed = FALSE; | |
6793 | ||
6794 | elf_link_hash_traverse (elf_hash_table (info), | |
6795 | _bfd_elf_link_find_version_dependencies, | |
6796 | &sinfo); | |
6797 | if (sinfo.failed) | |
6798 | return FALSE; | |
6799 | ||
6800 | if (elf_tdata (output_bfd)->verref == NULL) | |
6801 | s->flags |= SEC_EXCLUDE; | |
6802 | else | |
6803 | { | |
6804 | Elf_Internal_Verneed *vn; | |
6805 | unsigned int size; | |
6806 | unsigned int crefs; | |
6807 | bfd_byte *p; | |
6808 | ||
6809 | /* Build the version dependency section. */ | |
6810 | size = 0; | |
6811 | crefs = 0; | |
6812 | for (vn = elf_tdata (output_bfd)->verref; | |
6813 | vn != NULL; | |
6814 | vn = vn->vn_nextref) | |
6815 | { | |
6816 | Elf_Internal_Vernaux *a; | |
6817 | ||
6818 | size += sizeof (Elf_External_Verneed); | |
6819 | ++crefs; | |
6820 | for (a = vn->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6821 | size += sizeof (Elf_External_Vernaux); | |
6822 | } | |
6823 | ||
6824 | s->size = size; | |
6825 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); | |
6826 | if (s->contents == NULL) | |
6827 | return FALSE; | |
6828 | ||
6829 | p = s->contents; | |
6830 | for (vn = elf_tdata (output_bfd)->verref; | |
6831 | vn != NULL; | |
6832 | vn = vn->vn_nextref) | |
6833 | { | |
6834 | unsigned int caux; | |
6835 | Elf_Internal_Vernaux *a; | |
6836 | size_t indx; | |
6837 | ||
6838 | caux = 0; | |
6839 | for (a = vn->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6840 | ++caux; | |
6841 | ||
6842 | vn->vn_version = VER_NEED_CURRENT; | |
6843 | vn->vn_cnt = caux; | |
6844 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6845 | elf_dt_name (vn->vn_bfd) != NULL | |
6846 | ? elf_dt_name (vn->vn_bfd) | |
765cf5f6 AM |
6847 | : lbasename (bfd_get_filename |
6848 | (vn->vn_bfd)), | |
3d13f3e9 AM |
6849 | FALSE); |
6850 | if (indx == (size_t) -1) | |
6851 | return FALSE; | |
6852 | vn->vn_file = indx; | |
6853 | vn->vn_aux = sizeof (Elf_External_Verneed); | |
6854 | if (vn->vn_nextref == NULL) | |
6855 | vn->vn_next = 0; | |
6856 | else | |
6857 | vn->vn_next = (sizeof (Elf_External_Verneed) | |
6858 | + caux * sizeof (Elf_External_Vernaux)); | |
6859 | ||
6860 | _bfd_elf_swap_verneed_out (output_bfd, vn, | |
6861 | (Elf_External_Verneed *) p); | |
6862 | p += sizeof (Elf_External_Verneed); | |
6863 | ||
6864 | for (a = vn->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6865 | { | |
6866 | a->vna_hash = bfd_elf_hash (a->vna_nodename); | |
6867 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6868 | a->vna_nodename, FALSE); | |
6869 | if (indx == (size_t) -1) | |
6870 | return FALSE; | |
6871 | a->vna_name = indx; | |
6872 | if (a->vna_nextptr == NULL) | |
6873 | a->vna_next = 0; | |
6874 | else | |
6875 | a->vna_next = sizeof (Elf_External_Vernaux); | |
6876 | ||
6877 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
6878 | (Elf_External_Vernaux *) p); | |
6879 | p += sizeof (Elf_External_Vernaux); | |
6880 | } | |
6881 | } | |
6882 | ||
6883 | elf_tdata (output_bfd)->cverrefs = crefs; | |
6884 | } | |
902e9fc7 MR |
6885 | } |
6886 | ||
6887 | /* Any syms created from now on start with -1 in | |
6888 | got.refcount/offset and plt.refcount/offset. */ | |
6889 | elf_hash_table (info)->init_got_refcount | |
6890 | = elf_hash_table (info)->init_got_offset; | |
6891 | elf_hash_table (info)->init_plt_refcount | |
6892 | = elf_hash_table (info)->init_plt_offset; | |
6893 | ||
6894 | if (bfd_link_relocatable (info) | |
6895 | && !_bfd_elf_size_group_sections (info)) | |
6896 | return FALSE; | |
6897 | ||
6898 | /* The backend may have to create some sections regardless of whether | |
6899 | we're dynamic or not. */ | |
6900 | if (bed->elf_backend_always_size_sections | |
6901 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
6902 | return FALSE; | |
6903 | ||
6904 | /* Determine any GNU_STACK segment requirements, after the backend | |
6905 | has had a chance to set a default segment size. */ | |
6906 | if (info->execstack) | |
6907 | elf_stack_flags (output_bfd) = PF_R | PF_W | PF_X; | |
6908 | else if (info->noexecstack) | |
6909 | elf_stack_flags (output_bfd) = PF_R | PF_W; | |
6910 | else | |
6911 | { | |
6912 | bfd *inputobj; | |
6913 | asection *notesec = NULL; | |
6914 | int exec = 0; | |
6915 | ||
6916 | for (inputobj = info->input_bfds; | |
6917 | inputobj; | |
6918 | inputobj = inputobj->link.next) | |
6919 | { | |
6920 | asection *s; | |
6921 | ||
6922 | if (inputobj->flags | |
6923 | & (DYNAMIC | EXEC_P | BFD_PLUGIN | BFD_LINKER_CREATED)) | |
6924 | continue; | |
57963c05 AM |
6925 | s = inputobj->sections; |
6926 | if (s == NULL || s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
6927 | continue; | |
6928 | ||
902e9fc7 MR |
6929 | s = bfd_get_section_by_name (inputobj, ".note.GNU-stack"); |
6930 | if (s) | |
6931 | { | |
6932 | if (s->flags & SEC_CODE) | |
6933 | exec = PF_X; | |
6934 | notesec = s; | |
6935 | } | |
6936 | else if (bed->default_execstack) | |
6937 | exec = PF_X; | |
6938 | } | |
6939 | if (notesec || info->stacksize > 0) | |
6940 | elf_stack_flags (output_bfd) = PF_R | PF_W | exec; | |
6941 | if (notesec && exec && bfd_link_relocatable (info) | |
6942 | && notesec->output_section != bfd_abs_section_ptr) | |
6943 | notesec->output_section->flags |= SEC_CODE; | |
6944 | } | |
6945 | ||
6946 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) | |
6947 | { | |
6948 | struct elf_info_failed eif; | |
6949 | struct elf_link_hash_entry *h; | |
6950 | asection *dynstr; | |
6951 | asection *s; | |
6952 | ||
6953 | *sinterpptr = bfd_get_linker_section (dynobj, ".interp"); | |
6954 | BFD_ASSERT (*sinterpptr != NULL || !bfd_link_executable (info) || info->nointerp); | |
6955 | ||
902e9fc7 MR |
6956 | if (info->symbolic) |
6957 | { | |
6958 | if (!_bfd_elf_add_dynamic_entry (info, DT_SYMBOLIC, 0)) | |
6959 | return FALSE; | |
6960 | info->flags |= DF_SYMBOLIC; | |
6961 | } | |
6962 | ||
6963 | if (rpath != NULL) | |
6964 | { | |
6965 | size_t indx; | |
6966 | bfd_vma tag; | |
6967 | ||
6968 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, | |
6969 | TRUE); | |
6970 | if (indx == (size_t) -1) | |
6971 | return FALSE; | |
6972 | ||
6973 | tag = info->new_dtags ? DT_RUNPATH : DT_RPATH; | |
6974 | if (!_bfd_elf_add_dynamic_entry (info, tag, indx)) | |
6975 | return FALSE; | |
6976 | } | |
6977 | ||
6978 | if (filter_shlib != NULL) | |
6979 | { | |
6980 | size_t indx; | |
6981 | ||
6982 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6983 | filter_shlib, TRUE); | |
6984 | if (indx == (size_t) -1 | |
6985 | || !_bfd_elf_add_dynamic_entry (info, DT_FILTER, indx)) | |
6986 | return FALSE; | |
6987 | } | |
6988 | ||
6989 | if (auxiliary_filters != NULL) | |
6990 | { | |
6991 | const char * const *p; | |
6992 | ||
6993 | for (p = auxiliary_filters; *p != NULL; p++) | |
6994 | { | |
6995 | size_t indx; | |
6996 | ||
6997 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6998 | *p, TRUE); | |
6999 | if (indx == (size_t) -1 | |
7000 | || !_bfd_elf_add_dynamic_entry (info, DT_AUXILIARY, indx)) | |
7001 | return FALSE; | |
7002 | } | |
7003 | } | |
7004 | ||
7005 | if (audit != NULL) | |
7006 | { | |
7007 | size_t indx; | |
7008 | ||
7009 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, audit, | |
7010 | TRUE); | |
7011 | if (indx == (size_t) -1 | |
7012 | || !_bfd_elf_add_dynamic_entry (info, DT_AUDIT, indx)) | |
7013 | return FALSE; | |
7014 | } | |
7015 | ||
7016 | if (depaudit != NULL) | |
7017 | { | |
7018 | size_t indx; | |
7019 | ||
7020 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, depaudit, | |
7021 | TRUE); | |
7022 | if (indx == (size_t) -1 | |
7023 | || !_bfd_elf_add_dynamic_entry (info, DT_DEPAUDIT, indx)) | |
7024 | return FALSE; | |
7025 | } | |
7026 | ||
7027 | eif.info = info; | |
7028 | eif.failed = FALSE; | |
7029 | ||
7030 | /* Find all symbols which were defined in a dynamic object and make | |
7031 | the backend pick a reasonable value for them. */ | |
7032 | elf_link_hash_traverse (elf_hash_table (info), | |
7033 | _bfd_elf_adjust_dynamic_symbol, | |
7034 | &eif); | |
7035 | if (eif.failed) | |
7036 | return FALSE; | |
7037 | ||
7038 | /* Add some entries to the .dynamic section. We fill in some of the | |
7039 | values later, in bfd_elf_final_link, but we must add the entries | |
7040 | now so that we know the final size of the .dynamic section. */ | |
7041 | ||
7042 | /* If there are initialization and/or finalization functions to | |
7043 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
7044 | h = (info->init_function | |
7045 | ? elf_link_hash_lookup (elf_hash_table (info), | |
7046 | info->init_function, FALSE, | |
7047 | FALSE, FALSE) | |
7048 | : NULL); | |
7049 | if (h != NULL | |
7050 | && (h->ref_regular | |
7051 | || h->def_regular)) | |
7052 | { | |
7053 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT, 0)) | |
7054 | return FALSE; | |
7055 | } | |
7056 | h = (info->fini_function | |
7057 | ? elf_link_hash_lookup (elf_hash_table (info), | |
7058 | info->fini_function, FALSE, | |
7059 | FALSE, FALSE) | |
7060 | : NULL); | |
7061 | if (h != NULL | |
7062 | && (h->ref_regular | |
7063 | || h->def_regular)) | |
7064 | { | |
7065 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI, 0)) | |
7066 | return FALSE; | |
7067 | } | |
7068 | ||
7069 | s = bfd_get_section_by_name (output_bfd, ".preinit_array"); | |
7070 | if (s != NULL && s->linker_has_input) | |
7071 | { | |
7072 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
7073 | if (! bfd_link_executable (info)) | |
7074 | { | |
7075 | bfd *sub; | |
7076 | asection *o; | |
7077 | ||
57963c05 AM |
7078 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
7079 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour | |
7080 | && (o = sub->sections) != NULL | |
7081 | && o->sec_info_type != SEC_INFO_TYPE_JUST_SYMS) | |
902e9fc7 MR |
7082 | for (o = sub->sections; o != NULL; o = o->next) |
7083 | if (elf_section_data (o)->this_hdr.sh_type | |
7084 | == SHT_PREINIT_ARRAY) | |
7085 | { | |
7086 | _bfd_error_handler | |
871b3ab2 | 7087 | (_("%pB: .preinit_array section is not allowed in DSO"), |
902e9fc7 MR |
7088 | sub); |
7089 | break; | |
7090 | } | |
7091 | ||
7092 | bfd_set_error (bfd_error_nonrepresentable_section); | |
7093 | return FALSE; | |
7094 | } | |
7095 | ||
7096 | if (!_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAY, 0) | |
7097 | || !_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAYSZ, 0)) | |
7098 | return FALSE; | |
7099 | } | |
7100 | s = bfd_get_section_by_name (output_bfd, ".init_array"); | |
7101 | if (s != NULL && s->linker_has_input) | |
7102 | { | |
7103 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAY, 0) | |
7104 | || !_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAYSZ, 0)) | |
7105 | return FALSE; | |
7106 | } | |
7107 | s = bfd_get_section_by_name (output_bfd, ".fini_array"); | |
7108 | if (s != NULL && s->linker_has_input) | |
7109 | { | |
7110 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAY, 0) | |
7111 | || !_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAYSZ, 0)) | |
7112 | return FALSE; | |
7113 | } | |
7114 | ||
7115 | dynstr = bfd_get_linker_section (dynobj, ".dynstr"); | |
7116 | /* If .dynstr is excluded from the link, we don't want any of | |
7117 | these tags. Strictly, we should be checking each section | |
7118 | individually; This quick check covers for the case where | |
7119 | someone does a /DISCARD/ : { *(*) }. */ | |
7120 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
7121 | { | |
7122 | bfd_size_type strsize; | |
7123 | ||
7124 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
7125 | if ((info->emit_hash | |
7126 | && !_bfd_elf_add_dynamic_entry (info, DT_HASH, 0)) | |
7127 | || (info->emit_gnu_hash | |
f16a9783 MS |
7128 | && (bed->record_xhash_symbol == NULL |
7129 | && !_bfd_elf_add_dynamic_entry (info, DT_GNU_HASH, 0))) | |
902e9fc7 MR |
7130 | || !_bfd_elf_add_dynamic_entry (info, DT_STRTAB, 0) |
7131 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
7132 | || !_bfd_elf_add_dynamic_entry (info, DT_STRSZ, strsize) | |
7133 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMENT, | |
7134 | bed->s->sizeof_sym)) | |
7135 | return FALSE; | |
7136 | } | |
7137 | } | |
7138 | ||
7139 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) | |
7140 | return FALSE; | |
7141 | ||
7142 | /* The backend must work out the sizes of all the other dynamic | |
7143 | sections. */ | |
7144 | if (dynobj != NULL | |
7145 | && bed->elf_backend_size_dynamic_sections != NULL | |
7146 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
7147 | return FALSE; | |
7148 | ||
7149 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) | |
7150 | { | |
902e9fc7 MR |
7151 | if (elf_tdata (output_bfd)->cverdefs) |
7152 | { | |
7153 | unsigned int crefs = elf_tdata (output_bfd)->cverdefs; | |
7154 | ||
7155 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERDEF, 0) | |
7156 | || !_bfd_elf_add_dynamic_entry (info, DT_VERDEFNUM, crefs)) | |
7157 | return FALSE; | |
7158 | } | |
7159 | ||
7160 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) | |
7161 | { | |
7162 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS, info->flags)) | |
7163 | return FALSE; | |
7164 | } | |
7165 | else if (info->flags & DF_BIND_NOW) | |
7166 | { | |
7167 | if (!_bfd_elf_add_dynamic_entry (info, DT_BIND_NOW, 0)) | |
7168 | return FALSE; | |
7169 | } | |
7170 | ||
7171 | if (info->flags_1) | |
7172 | { | |
7173 | if (bfd_link_executable (info)) | |
7174 | info->flags_1 &= ~ (DF_1_INITFIRST | |
7175 | | DF_1_NODELETE | |
7176 | | DF_1_NOOPEN); | |
7177 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS_1, info->flags_1)) | |
7178 | return FALSE; | |
7179 | } | |
7180 | ||
7181 | if (elf_tdata (output_bfd)->cverrefs) | |
7182 | { | |
7183 | unsigned int crefs = elf_tdata (output_bfd)->cverrefs; | |
7184 | ||
7185 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERNEED, 0) | |
7186 | || !_bfd_elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs)) | |
7187 | return FALSE; | |
7188 | } | |
5a580b3a | 7189 | |
8423293d AM |
7190 | if ((elf_tdata (output_bfd)->cverrefs == 0 |
7191 | && elf_tdata (output_bfd)->cverdefs == 0) | |
63f452a8 | 7192 | || _bfd_elf_link_renumber_dynsyms (output_bfd, info, NULL) <= 1) |
8423293d | 7193 | { |
902e9fc7 MR |
7194 | asection *s; |
7195 | ||
3d4d4302 | 7196 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
8423293d AM |
7197 | s->flags |= SEC_EXCLUDE; |
7198 | } | |
7199 | } | |
7200 | return TRUE; | |
7201 | } | |
7202 | ||
74541ad4 AM |
7203 | /* Find the first non-excluded output section. We'll use its |
7204 | section symbol for some emitted relocs. */ | |
7205 | void | |
7206 | _bfd_elf_init_1_index_section (bfd *output_bfd, struct bfd_link_info *info) | |
7207 | { | |
7208 | asection *s; | |
f26a3287 | 7209 | asection *found = NULL; |
74541ad4 AM |
7210 | |
7211 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
7212 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC | |
d00dd7dc | 7213 | && !_bfd_elf_omit_section_dynsym_default (output_bfd, info, s)) |
74541ad4 | 7214 | { |
f26a3287 AM |
7215 | found = s; |
7216 | if ((s->flags & SEC_THREAD_LOCAL) == 0) | |
7217 | break; | |
74541ad4 | 7218 | } |
f26a3287 | 7219 | elf_hash_table (info)->text_index_section = found; |
74541ad4 AM |
7220 | } |
7221 | ||
7222 | /* Find two non-excluded output sections, one for code, one for data. | |
7223 | We'll use their section symbols for some emitted relocs. */ | |
7224 | void | |
7225 | _bfd_elf_init_2_index_sections (bfd *output_bfd, struct bfd_link_info *info) | |
7226 | { | |
7227 | asection *s; | |
f26a3287 | 7228 | asection *found = NULL; |
74541ad4 | 7229 | |
266b05cf | 7230 | /* Data first, since setting text_index_section changes |
7f923b7f | 7231 | _bfd_elf_omit_section_dynsym_default. */ |
74541ad4 | 7232 | for (s = output_bfd->sections; s != NULL; s = s->next) |
f26a3287 AM |
7233 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC |
7234 | && !(s->flags & SEC_READONLY) | |
d00dd7dc | 7235 | && !_bfd_elf_omit_section_dynsym_default (output_bfd, info, s)) |
74541ad4 | 7236 | { |
f26a3287 AM |
7237 | found = s; |
7238 | if ((s->flags & SEC_THREAD_LOCAL) == 0) | |
7239 | break; | |
74541ad4 | 7240 | } |
f26a3287 | 7241 | elf_hash_table (info)->data_index_section = found; |
74541ad4 AM |
7242 | |
7243 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
f26a3287 AM |
7244 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC |
7245 | && (s->flags & SEC_READONLY) | |
d00dd7dc | 7246 | && !_bfd_elf_omit_section_dynsym_default (output_bfd, info, s)) |
74541ad4 | 7247 | { |
f26a3287 | 7248 | found = s; |
74541ad4 AM |
7249 | break; |
7250 | } | |
f26a3287 | 7251 | elf_hash_table (info)->text_index_section = found; |
74541ad4 AM |
7252 | } |
7253 | ||
f16a9783 MS |
7254 | #define GNU_HASH_SECTION_NAME(bed) \ |
7255 | (bed)->record_xhash_symbol != NULL ? ".MIPS.xhash" : ".gnu.hash" | |
7256 | ||
8423293d AM |
7257 | bfd_boolean |
7258 | bfd_elf_size_dynsym_hash_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
7259 | { | |
74541ad4 | 7260 | const struct elf_backend_data *bed; |
23ec1e32 | 7261 | unsigned long section_sym_count; |
96d01d93 | 7262 | bfd_size_type dynsymcount = 0; |
74541ad4 | 7263 | |
8423293d AM |
7264 | if (!is_elf_hash_table (info->hash)) |
7265 | return TRUE; | |
7266 | ||
74541ad4 AM |
7267 | bed = get_elf_backend_data (output_bfd); |
7268 | (*bed->elf_backend_init_index_section) (output_bfd, info); | |
7269 | ||
23ec1e32 MR |
7270 | /* Assign dynsym indices. In a shared library we generate a section |
7271 | symbol for each output section, which come first. Next come all | |
7272 | of the back-end allocated local dynamic syms, followed by the rest | |
7273 | of the global symbols. | |
7274 | ||
7275 | This is usually not needed for static binaries, however backends | |
7276 | can request to always do it, e.g. the MIPS backend uses dynamic | |
7277 | symbol counts to lay out GOT, which will be produced in the | |
7278 | presence of GOT relocations even in static binaries (holding fixed | |
7279 | data in that case, to satisfy those relocations). */ | |
7280 | ||
7281 | if (elf_hash_table (info)->dynamic_sections_created | |
7282 | || bed->always_renumber_dynsyms) | |
7283 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info, | |
7284 | §ion_sym_count); | |
7285 | ||
8423293d AM |
7286 | if (elf_hash_table (info)->dynamic_sections_created) |
7287 | { | |
7288 | bfd *dynobj; | |
8423293d | 7289 | asection *s; |
8423293d AM |
7290 | unsigned int dtagcount; |
7291 | ||
7292 | dynobj = elf_hash_table (info)->dynobj; | |
7293 | ||
5a580b3a | 7294 | /* Work out the size of the symbol version section. */ |
3d4d4302 | 7295 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
5a580b3a | 7296 | BFD_ASSERT (s != NULL); |
d5486c43 | 7297 | if ((s->flags & SEC_EXCLUDE) == 0) |
5a580b3a | 7298 | { |
eea6121a | 7299 | s->size = dynsymcount * sizeof (Elf_External_Versym); |
a50b1753 | 7300 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
5a580b3a AM |
7301 | if (s->contents == NULL) |
7302 | return FALSE; | |
7303 | ||
7304 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERSYM, 0)) | |
7305 | return FALSE; | |
7306 | } | |
7307 | ||
7308 | /* Set the size of the .dynsym and .hash sections. We counted | |
7309 | the number of dynamic symbols in elf_link_add_object_symbols. | |
7310 | We will build the contents of .dynsym and .hash when we build | |
7311 | the final symbol table, because until then we do not know the | |
7312 | correct value to give the symbols. We built the .dynstr | |
7313 | section as we went along in elf_link_add_object_symbols. */ | |
cae1fbbb | 7314 | s = elf_hash_table (info)->dynsym; |
5a580b3a | 7315 | BFD_ASSERT (s != NULL); |
eea6121a | 7316 | s->size = dynsymcount * bed->s->sizeof_sym; |
5a580b3a | 7317 | |
d5486c43 L |
7318 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
7319 | if (s->contents == NULL) | |
7320 | return FALSE; | |
5a580b3a | 7321 | |
d5486c43 L |
7322 | /* The first entry in .dynsym is a dummy symbol. Clear all the |
7323 | section syms, in case we don't output them all. */ | |
7324 | ++section_sym_count; | |
7325 | memset (s->contents, 0, section_sym_count * bed->s->sizeof_sym); | |
5a580b3a | 7326 | |
fdc90cb4 JJ |
7327 | elf_hash_table (info)->bucketcount = 0; |
7328 | ||
5a580b3a AM |
7329 | /* Compute the size of the hashing table. As a side effect this |
7330 | computes the hash values for all the names we export. */ | |
fdc90cb4 JJ |
7331 | if (info->emit_hash) |
7332 | { | |
7333 | unsigned long int *hashcodes; | |
14b1c01e | 7334 | struct hash_codes_info hashinf; |
fdc90cb4 JJ |
7335 | bfd_size_type amt; |
7336 | unsigned long int nsyms; | |
7337 | size_t bucketcount; | |
7338 | size_t hash_entry_size; | |
7339 | ||
7340 | /* Compute the hash values for all exported symbols. At the same | |
7341 | time store the values in an array so that we could use them for | |
7342 | optimizations. */ | |
7343 | amt = dynsymcount * sizeof (unsigned long int); | |
a50b1753 | 7344 | hashcodes = (unsigned long int *) bfd_malloc (amt); |
fdc90cb4 JJ |
7345 | if (hashcodes == NULL) |
7346 | return FALSE; | |
14b1c01e AM |
7347 | hashinf.hashcodes = hashcodes; |
7348 | hashinf.error = FALSE; | |
5a580b3a | 7349 | |
fdc90cb4 JJ |
7350 | /* Put all hash values in HASHCODES. */ |
7351 | elf_link_hash_traverse (elf_hash_table (info), | |
14b1c01e AM |
7352 | elf_collect_hash_codes, &hashinf); |
7353 | if (hashinf.error) | |
4dd07732 AM |
7354 | { |
7355 | free (hashcodes); | |
7356 | return FALSE; | |
7357 | } | |
5a580b3a | 7358 | |
14b1c01e | 7359 | nsyms = hashinf.hashcodes - hashcodes; |
fdc90cb4 JJ |
7360 | bucketcount |
7361 | = compute_bucket_count (info, hashcodes, nsyms, 0); | |
7362 | free (hashcodes); | |
7363 | ||
4b48e2f6 | 7364 | if (bucketcount == 0 && nsyms > 0) |
fdc90cb4 | 7365 | return FALSE; |
5a580b3a | 7366 | |
fdc90cb4 JJ |
7367 | elf_hash_table (info)->bucketcount = bucketcount; |
7368 | ||
3d4d4302 | 7369 | s = bfd_get_linker_section (dynobj, ".hash"); |
fdc90cb4 JJ |
7370 | BFD_ASSERT (s != NULL); |
7371 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; | |
7372 | s->size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
a50b1753 | 7373 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
7374 | if (s->contents == NULL) |
7375 | return FALSE; | |
7376 | ||
7377 | bfd_put (8 * hash_entry_size, output_bfd, bucketcount, s->contents); | |
7378 | bfd_put (8 * hash_entry_size, output_bfd, dynsymcount, | |
7379 | s->contents + hash_entry_size); | |
7380 | } | |
7381 | ||
7382 | if (info->emit_gnu_hash) | |
7383 | { | |
7384 | size_t i, cnt; | |
7385 | unsigned char *contents; | |
7386 | struct collect_gnu_hash_codes cinfo; | |
7387 | bfd_size_type amt; | |
7388 | size_t bucketcount; | |
7389 | ||
7390 | memset (&cinfo, 0, sizeof (cinfo)); | |
7391 | ||
7392 | /* Compute the hash values for all exported symbols. At the same | |
7393 | time store the values in an array so that we could use them for | |
7394 | optimizations. */ | |
7395 | amt = dynsymcount * 2 * sizeof (unsigned long int); | |
a50b1753 | 7396 | cinfo.hashcodes = (long unsigned int *) bfd_malloc (amt); |
fdc90cb4 JJ |
7397 | if (cinfo.hashcodes == NULL) |
7398 | return FALSE; | |
7399 | ||
7400 | cinfo.hashval = cinfo.hashcodes + dynsymcount; | |
7401 | cinfo.min_dynindx = -1; | |
7402 | cinfo.output_bfd = output_bfd; | |
7403 | cinfo.bed = bed; | |
7404 | ||
7405 | /* Put all hash values in HASHCODES. */ | |
7406 | elf_link_hash_traverse (elf_hash_table (info), | |
7407 | elf_collect_gnu_hash_codes, &cinfo); | |
14b1c01e | 7408 | if (cinfo.error) |
4dd07732 AM |
7409 | { |
7410 | free (cinfo.hashcodes); | |
7411 | return FALSE; | |
7412 | } | |
fdc90cb4 JJ |
7413 | |
7414 | bucketcount | |
7415 | = compute_bucket_count (info, cinfo.hashcodes, cinfo.nsyms, 1); | |
7416 | ||
7417 | if (bucketcount == 0) | |
7418 | { | |
7419 | free (cinfo.hashcodes); | |
7420 | return FALSE; | |
7421 | } | |
7422 | ||
f16a9783 | 7423 | s = bfd_get_linker_section (dynobj, GNU_HASH_SECTION_NAME (bed)); |
fdc90cb4 JJ |
7424 | BFD_ASSERT (s != NULL); |
7425 | ||
7426 | if (cinfo.nsyms == 0) | |
7427 | { | |
f16a9783 | 7428 | /* Empty .gnu.hash or .MIPS.xhash section is special. */ |
fdc90cb4 JJ |
7429 | BFD_ASSERT (cinfo.min_dynindx == -1); |
7430 | free (cinfo.hashcodes); | |
7431 | s->size = 5 * 4 + bed->s->arch_size / 8; | |
a50b1753 | 7432 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
7433 | if (contents == NULL) |
7434 | return FALSE; | |
7435 | s->contents = contents; | |
7436 | /* 1 empty bucket. */ | |
7437 | bfd_put_32 (output_bfd, 1, contents); | |
7438 | /* SYMIDX above the special symbol 0. */ | |
7439 | bfd_put_32 (output_bfd, 1, contents + 4); | |
7440 | /* Just one word for bitmask. */ | |
7441 | bfd_put_32 (output_bfd, 1, contents + 8); | |
7442 | /* Only hash fn bloom filter. */ | |
7443 | bfd_put_32 (output_bfd, 0, contents + 12); | |
7444 | /* No hashes are valid - empty bitmask. */ | |
7445 | bfd_put (bed->s->arch_size, output_bfd, 0, contents + 16); | |
7446 | /* No hashes in the only bucket. */ | |
7447 | bfd_put_32 (output_bfd, 0, | |
7448 | contents + 16 + bed->s->arch_size / 8); | |
7449 | } | |
7450 | else | |
7451 | { | |
9e6619e2 | 7452 | unsigned long int maskwords, maskbitslog2, x; |
0b33793d | 7453 | BFD_ASSERT (cinfo.min_dynindx != -1); |
fdc90cb4 | 7454 | |
9e6619e2 AM |
7455 | x = cinfo.nsyms; |
7456 | maskbitslog2 = 1; | |
7457 | while ((x >>= 1) != 0) | |
7458 | ++maskbitslog2; | |
fdc90cb4 JJ |
7459 | if (maskbitslog2 < 3) |
7460 | maskbitslog2 = 5; | |
7461 | else if ((1 << (maskbitslog2 - 2)) & cinfo.nsyms) | |
7462 | maskbitslog2 = maskbitslog2 + 3; | |
7463 | else | |
7464 | maskbitslog2 = maskbitslog2 + 2; | |
7465 | if (bed->s->arch_size == 64) | |
7466 | { | |
7467 | if (maskbitslog2 == 5) | |
7468 | maskbitslog2 = 6; | |
7469 | cinfo.shift1 = 6; | |
7470 | } | |
7471 | else | |
7472 | cinfo.shift1 = 5; | |
7473 | cinfo.mask = (1 << cinfo.shift1) - 1; | |
2ccdbfcc | 7474 | cinfo.shift2 = maskbitslog2; |
fdc90cb4 JJ |
7475 | cinfo.maskbits = 1 << maskbitslog2; |
7476 | maskwords = 1 << (maskbitslog2 - cinfo.shift1); | |
7477 | amt = bucketcount * sizeof (unsigned long int) * 2; | |
7478 | amt += maskwords * sizeof (bfd_vma); | |
a50b1753 | 7479 | cinfo.bitmask = (bfd_vma *) bfd_malloc (amt); |
fdc90cb4 JJ |
7480 | if (cinfo.bitmask == NULL) |
7481 | { | |
7482 | free (cinfo.hashcodes); | |
7483 | return FALSE; | |
7484 | } | |
7485 | ||
a50b1753 | 7486 | cinfo.counts = (long unsigned int *) (cinfo.bitmask + maskwords); |
fdc90cb4 JJ |
7487 | cinfo.indx = cinfo.counts + bucketcount; |
7488 | cinfo.symindx = dynsymcount - cinfo.nsyms; | |
7489 | memset (cinfo.bitmask, 0, maskwords * sizeof (bfd_vma)); | |
7490 | ||
7491 | /* Determine how often each hash bucket is used. */ | |
7492 | memset (cinfo.counts, 0, bucketcount * sizeof (cinfo.counts[0])); | |
7493 | for (i = 0; i < cinfo.nsyms; ++i) | |
7494 | ++cinfo.counts[cinfo.hashcodes[i] % bucketcount]; | |
7495 | ||
7496 | for (i = 0, cnt = cinfo.symindx; i < bucketcount; ++i) | |
7497 | if (cinfo.counts[i] != 0) | |
7498 | { | |
7499 | cinfo.indx[i] = cnt; | |
7500 | cnt += cinfo.counts[i]; | |
7501 | } | |
7502 | BFD_ASSERT (cnt == dynsymcount); | |
7503 | cinfo.bucketcount = bucketcount; | |
7504 | cinfo.local_indx = cinfo.min_dynindx; | |
7505 | ||
7506 | s->size = (4 + bucketcount + cinfo.nsyms) * 4; | |
7507 | s->size += cinfo.maskbits / 8; | |
f16a9783 MS |
7508 | if (bed->record_xhash_symbol != NULL) |
7509 | s->size += cinfo.nsyms * 4; | |
a50b1753 | 7510 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
7511 | if (contents == NULL) |
7512 | { | |
7513 | free (cinfo.bitmask); | |
7514 | free (cinfo.hashcodes); | |
7515 | return FALSE; | |
7516 | } | |
7517 | ||
7518 | s->contents = contents; | |
7519 | bfd_put_32 (output_bfd, bucketcount, contents); | |
7520 | bfd_put_32 (output_bfd, cinfo.symindx, contents + 4); | |
7521 | bfd_put_32 (output_bfd, maskwords, contents + 8); | |
7522 | bfd_put_32 (output_bfd, cinfo.shift2, contents + 12); | |
7523 | contents += 16 + cinfo.maskbits / 8; | |
7524 | ||
7525 | for (i = 0; i < bucketcount; ++i) | |
7526 | { | |
7527 | if (cinfo.counts[i] == 0) | |
7528 | bfd_put_32 (output_bfd, 0, contents); | |
7529 | else | |
7530 | bfd_put_32 (output_bfd, cinfo.indx[i], contents); | |
7531 | contents += 4; | |
7532 | } | |
7533 | ||
7534 | cinfo.contents = contents; | |
7535 | ||
f16a9783 MS |
7536 | cinfo.xlat = contents + cinfo.nsyms * 4 - s->contents; |
7537 | /* Renumber dynamic symbols, if populating .gnu.hash section. | |
7538 | If using .MIPS.xhash, populate the translation table. */ | |
fdc90cb4 | 7539 | elf_link_hash_traverse (elf_hash_table (info), |
f16a9783 | 7540 | elf_gnu_hash_process_symidx, &cinfo); |
fdc90cb4 JJ |
7541 | |
7542 | contents = s->contents + 16; | |
7543 | for (i = 0; i < maskwords; ++i) | |
7544 | { | |
7545 | bfd_put (bed->s->arch_size, output_bfd, cinfo.bitmask[i], | |
7546 | contents); | |
7547 | contents += bed->s->arch_size / 8; | |
7548 | } | |
7549 | ||
7550 | free (cinfo.bitmask); | |
7551 | free (cinfo.hashcodes); | |
7552 | } | |
7553 | } | |
5a580b3a | 7554 | |
3d4d4302 | 7555 | s = bfd_get_linker_section (dynobj, ".dynstr"); |
5a580b3a AM |
7556 | BFD_ASSERT (s != NULL); |
7557 | ||
4ad4eba5 | 7558 | elf_finalize_dynstr (output_bfd, info); |
5a580b3a | 7559 | |
eea6121a | 7560 | s->size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
5a580b3a AM |
7561 | |
7562 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) | |
7563 | if (!_bfd_elf_add_dynamic_entry (info, DT_NULL, 0)) | |
7564 | return FALSE; | |
7565 | } | |
7566 | ||
7567 | return TRUE; | |
7568 | } | |
4d269e42 | 7569 | \f |
4d269e42 AM |
7570 | /* Make sure sec_info_type is cleared if sec_info is cleared too. */ |
7571 | ||
7572 | static void | |
7573 | merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED, | |
7574 | asection *sec) | |
7575 | { | |
dbaa2011 AM |
7576 | BFD_ASSERT (sec->sec_info_type == SEC_INFO_TYPE_MERGE); |
7577 | sec->sec_info_type = SEC_INFO_TYPE_NONE; | |
4d269e42 AM |
7578 | } |
7579 | ||
7580 | /* Finish SHF_MERGE section merging. */ | |
7581 | ||
7582 | bfd_boolean | |
630993ec | 7583 | _bfd_elf_merge_sections (bfd *obfd, struct bfd_link_info *info) |
4d269e42 AM |
7584 | { |
7585 | bfd *ibfd; | |
7586 | asection *sec; | |
7587 | ||
7588 | if (!is_elf_hash_table (info->hash)) | |
7589 | return FALSE; | |
7590 | ||
c72f2fb2 | 7591 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
630993ec AM |
7592 | if ((ibfd->flags & DYNAMIC) == 0 |
7593 | && bfd_get_flavour (ibfd) == bfd_target_elf_flavour | |
017e6bce AM |
7594 | && (elf_elfheader (ibfd)->e_ident[EI_CLASS] |
7595 | == get_elf_backend_data (obfd)->s->elfclass)) | |
4d269e42 AM |
7596 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
7597 | if ((sec->flags & SEC_MERGE) != 0 | |
7598 | && !bfd_is_abs_section (sec->output_section)) | |
7599 | { | |
7600 | struct bfd_elf_section_data *secdata; | |
7601 | ||
7602 | secdata = elf_section_data (sec); | |
630993ec | 7603 | if (! _bfd_add_merge_section (obfd, |
4d269e42 AM |
7604 | &elf_hash_table (info)->merge_info, |
7605 | sec, &secdata->sec_info)) | |
7606 | return FALSE; | |
7607 | else if (secdata->sec_info) | |
dbaa2011 | 7608 | sec->sec_info_type = SEC_INFO_TYPE_MERGE; |
4d269e42 AM |
7609 | } |
7610 | ||
7611 | if (elf_hash_table (info)->merge_info != NULL) | |
630993ec | 7612 | _bfd_merge_sections (obfd, info, elf_hash_table (info)->merge_info, |
4d269e42 AM |
7613 | merge_sections_remove_hook); |
7614 | return TRUE; | |
7615 | } | |
7616 | ||
7617 | /* Create an entry in an ELF linker hash table. */ | |
7618 | ||
7619 | struct bfd_hash_entry * | |
7620 | _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry, | |
7621 | struct bfd_hash_table *table, | |
7622 | const char *string) | |
7623 | { | |
7624 | /* Allocate the structure if it has not already been allocated by a | |
7625 | subclass. */ | |
7626 | if (entry == NULL) | |
7627 | { | |
a50b1753 | 7628 | entry = (struct bfd_hash_entry *) |
ca4be51c | 7629 | bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)); |
4d269e42 AM |
7630 | if (entry == NULL) |
7631 | return entry; | |
7632 | } | |
7633 | ||
7634 | /* Call the allocation method of the superclass. */ | |
7635 | entry = _bfd_link_hash_newfunc (entry, table, string); | |
7636 | if (entry != NULL) | |
7637 | { | |
7638 | struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; | |
7639 | struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table; | |
7640 | ||
7641 | /* Set local fields. */ | |
7642 | ret->indx = -1; | |
7643 | ret->dynindx = -1; | |
7644 | ret->got = htab->init_got_refcount; | |
7645 | ret->plt = htab->init_plt_refcount; | |
7646 | memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry) | |
7647 | - offsetof (struct elf_link_hash_entry, size))); | |
7648 | /* Assume that we have been called by a non-ELF symbol reader. | |
7649 | This flag is then reset by the code which reads an ELF input | |
7650 | file. This ensures that a symbol created by a non-ELF symbol | |
7651 | reader will have the flag set correctly. */ | |
7652 | ret->non_elf = 1; | |
7653 | } | |
7654 | ||
7655 | return entry; | |
7656 | } | |
7657 | ||
7658 | /* Copy data from an indirect symbol to its direct symbol, hiding the | |
7659 | old indirect symbol. Also used for copying flags to a weakdef. */ | |
7660 | ||
7661 | void | |
7662 | _bfd_elf_link_hash_copy_indirect (struct bfd_link_info *info, | |
7663 | struct elf_link_hash_entry *dir, | |
7664 | struct elf_link_hash_entry *ind) | |
7665 | { | |
7666 | struct elf_link_hash_table *htab; | |
7667 | ||
ad172eaa L |
7668 | if (ind->dyn_relocs != NULL) |
7669 | { | |
7670 | if (dir->dyn_relocs != NULL) | |
7671 | { | |
7672 | struct elf_dyn_relocs **pp; | |
7673 | struct elf_dyn_relocs *p; | |
7674 | ||
7675 | /* Add reloc counts against the indirect sym to the direct sym | |
7676 | list. Merge any entries against the same section. */ | |
7677 | for (pp = &ind->dyn_relocs; (p = *pp) != NULL; ) | |
7678 | { | |
7679 | struct elf_dyn_relocs *q; | |
7680 | ||
7681 | for (q = dir->dyn_relocs; q != NULL; q = q->next) | |
7682 | if (q->sec == p->sec) | |
7683 | { | |
7684 | q->pc_count += p->pc_count; | |
7685 | q->count += p->count; | |
7686 | *pp = p->next; | |
7687 | break; | |
7688 | } | |
7689 | if (q == NULL) | |
7690 | pp = &p->next; | |
7691 | } | |
7692 | *pp = dir->dyn_relocs; | |
7693 | } | |
7694 | ||
7695 | dir->dyn_relocs = ind->dyn_relocs; | |
7696 | ind->dyn_relocs = NULL; | |
7697 | } | |
7698 | ||
4d269e42 | 7699 | /* Copy down any references that we may have already seen to the |
e81830c5 | 7700 | symbol which just became indirect. */ |
4d269e42 | 7701 | |
422f1182 | 7702 | if (dir->versioned != versioned_hidden) |
e81830c5 AM |
7703 | dir->ref_dynamic |= ind->ref_dynamic; |
7704 | dir->ref_regular |= ind->ref_regular; | |
7705 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
7706 | dir->non_got_ref |= ind->non_got_ref; | |
7707 | dir->needs_plt |= ind->needs_plt; | |
7708 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
4d269e42 AM |
7709 | |
7710 | if (ind->root.type != bfd_link_hash_indirect) | |
7711 | return; | |
7712 | ||
7713 | /* Copy over the global and procedure linkage table refcount entries. | |
7714 | These may have been already set up by a check_relocs routine. */ | |
7715 | htab = elf_hash_table (info); | |
7716 | if (ind->got.refcount > htab->init_got_refcount.refcount) | |
7717 | { | |
7718 | if (dir->got.refcount < 0) | |
7719 | dir->got.refcount = 0; | |
7720 | dir->got.refcount += ind->got.refcount; | |
7721 | ind->got.refcount = htab->init_got_refcount.refcount; | |
7722 | } | |
7723 | ||
7724 | if (ind->plt.refcount > htab->init_plt_refcount.refcount) | |
7725 | { | |
7726 | if (dir->plt.refcount < 0) | |
7727 | dir->plt.refcount = 0; | |
7728 | dir->plt.refcount += ind->plt.refcount; | |
7729 | ind->plt.refcount = htab->init_plt_refcount.refcount; | |
7730 | } | |
7731 | ||
7732 | if (ind->dynindx != -1) | |
7733 | { | |
7734 | if (dir->dynindx != -1) | |
7735 | _bfd_elf_strtab_delref (htab->dynstr, dir->dynstr_index); | |
7736 | dir->dynindx = ind->dynindx; | |
7737 | dir->dynstr_index = ind->dynstr_index; | |
7738 | ind->dynindx = -1; | |
7739 | ind->dynstr_index = 0; | |
7740 | } | |
7741 | } | |
7742 | ||
7743 | void | |
7744 | _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info, | |
7745 | struct elf_link_hash_entry *h, | |
7746 | bfd_boolean force_local) | |
7747 | { | |
3aa14d16 L |
7748 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
7749 | if (h->type != STT_GNU_IFUNC) | |
7750 | { | |
7751 | h->plt = elf_hash_table (info)->init_plt_offset; | |
7752 | h->needs_plt = 0; | |
7753 | } | |
4d269e42 AM |
7754 | if (force_local) |
7755 | { | |
7756 | h->forced_local = 1; | |
7757 | if (h->dynindx != -1) | |
7758 | { | |
4d269e42 AM |
7759 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
7760 | h->dynstr_index); | |
641338d8 AM |
7761 | h->dynindx = -1; |
7762 | h->dynstr_index = 0; | |
4d269e42 AM |
7763 | } |
7764 | } | |
7765 | } | |
7766 | ||
34a87bb0 L |
7767 | /* Hide a symbol. */ |
7768 | ||
7769 | void | |
7770 | _bfd_elf_link_hide_symbol (bfd *output_bfd, | |
7771 | struct bfd_link_info *info, | |
7772 | struct bfd_link_hash_entry *h) | |
7773 | { | |
7774 | if (is_elf_hash_table (info->hash)) | |
7775 | { | |
7776 | const struct elf_backend_data *bed | |
7777 | = get_elf_backend_data (output_bfd); | |
7778 | struct elf_link_hash_entry *eh | |
7779 | = (struct elf_link_hash_entry *) h; | |
7780 | bed->elf_backend_hide_symbol (info, eh, TRUE); | |
7781 | eh->def_dynamic = 0; | |
7782 | eh->ref_dynamic = 0; | |
7783 | eh->dynamic_def = 0; | |
7784 | } | |
7785 | } | |
7786 | ||
7bf52ea2 AM |
7787 | /* Initialize an ELF linker hash table. *TABLE has been zeroed by our |
7788 | caller. */ | |
4d269e42 AM |
7789 | |
7790 | bfd_boolean | |
7791 | _bfd_elf_link_hash_table_init | |
7792 | (struct elf_link_hash_table *table, | |
7793 | bfd *abfd, | |
7794 | struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *, | |
7795 | struct bfd_hash_table *, | |
7796 | const char *), | |
4dfe6ac6 NC |
7797 | unsigned int entsize, |
7798 | enum elf_target_id target_id) | |
4d269e42 AM |
7799 | { |
7800 | bfd_boolean ret; | |
7801 | int can_refcount = get_elf_backend_data (abfd)->can_refcount; | |
7802 | ||
4d269e42 AM |
7803 | table->init_got_refcount.refcount = can_refcount - 1; |
7804 | table->init_plt_refcount.refcount = can_refcount - 1; | |
7805 | table->init_got_offset.offset = -(bfd_vma) 1; | |
7806 | table->init_plt_offset.offset = -(bfd_vma) 1; | |
7807 | /* The first dynamic symbol is a dummy. */ | |
7808 | table->dynsymcount = 1; | |
7809 | ||
7810 | ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); | |
4dfe6ac6 | 7811 | |
4d269e42 | 7812 | table->root.type = bfd_link_elf_hash_table; |
4dfe6ac6 | 7813 | table->hash_table_id = target_id; |
90c14f0c | 7814 | table->target_os = get_elf_backend_data (abfd)->target_os; |
4d269e42 AM |
7815 | |
7816 | return ret; | |
7817 | } | |
7818 | ||
7819 | /* Create an ELF linker hash table. */ | |
7820 | ||
7821 | struct bfd_link_hash_table * | |
7822 | _bfd_elf_link_hash_table_create (bfd *abfd) | |
7823 | { | |
7824 | struct elf_link_hash_table *ret; | |
986f0783 | 7825 | size_t amt = sizeof (struct elf_link_hash_table); |
4d269e42 | 7826 | |
7bf52ea2 | 7827 | ret = (struct elf_link_hash_table *) bfd_zmalloc (amt); |
4d269e42 AM |
7828 | if (ret == NULL) |
7829 | return NULL; | |
7830 | ||
7831 | if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc, | |
4dfe6ac6 NC |
7832 | sizeof (struct elf_link_hash_entry), |
7833 | GENERIC_ELF_DATA)) | |
4d269e42 AM |
7834 | { |
7835 | free (ret); | |
7836 | return NULL; | |
7837 | } | |
d495ab0d | 7838 | ret->root.hash_table_free = _bfd_elf_link_hash_table_free; |
4d269e42 AM |
7839 | |
7840 | return &ret->root; | |
7841 | } | |
7842 | ||
9f7c3e5e AM |
7843 | /* Destroy an ELF linker hash table. */ |
7844 | ||
7845 | void | |
d495ab0d | 7846 | _bfd_elf_link_hash_table_free (bfd *obfd) |
9f7c3e5e | 7847 | { |
d495ab0d AM |
7848 | struct elf_link_hash_table *htab; |
7849 | ||
7850 | htab = (struct elf_link_hash_table *) obfd->link.hash; | |
9f7c3e5e AM |
7851 | if (htab->dynstr != NULL) |
7852 | _bfd_elf_strtab_free (htab->dynstr); | |
7853 | _bfd_merge_sections_free (htab->merge_info); | |
d495ab0d | 7854 | _bfd_generic_link_hash_table_free (obfd); |
9f7c3e5e AM |
7855 | } |
7856 | ||
4d269e42 AM |
7857 | /* This is a hook for the ELF emulation code in the generic linker to |
7858 | tell the backend linker what file name to use for the DT_NEEDED | |
7859 | entry for a dynamic object. */ | |
7860 | ||
7861 | void | |
7862 | bfd_elf_set_dt_needed_name (bfd *abfd, const char *name) | |
7863 | { | |
7864 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7865 | && bfd_get_format (abfd) == bfd_object) | |
7866 | elf_dt_name (abfd) = name; | |
7867 | } | |
7868 | ||
7869 | int | |
7870 | bfd_elf_get_dyn_lib_class (bfd *abfd) | |
7871 | { | |
7872 | int lib_class; | |
7873 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7874 | && bfd_get_format (abfd) == bfd_object) | |
7875 | lib_class = elf_dyn_lib_class (abfd); | |
7876 | else | |
7877 | lib_class = 0; | |
7878 | return lib_class; | |
7879 | } | |
7880 | ||
7881 | void | |
7882 | bfd_elf_set_dyn_lib_class (bfd *abfd, enum dynamic_lib_link_class lib_class) | |
7883 | { | |
7884 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7885 | && bfd_get_format (abfd) == bfd_object) | |
7886 | elf_dyn_lib_class (abfd) = lib_class; | |
7887 | } | |
7888 | ||
7889 | /* Get the list of DT_NEEDED entries for a link. This is a hook for | |
7890 | the linker ELF emulation code. */ | |
7891 | ||
7892 | struct bfd_link_needed_list * | |
7893 | bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7894 | struct bfd_link_info *info) | |
7895 | { | |
7896 | if (! is_elf_hash_table (info->hash)) | |
7897 | return NULL; | |
7898 | return elf_hash_table (info)->needed; | |
7899 | } | |
7900 | ||
7901 | /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a | |
7902 | hook for the linker ELF emulation code. */ | |
7903 | ||
7904 | struct bfd_link_needed_list * | |
7905 | bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7906 | struct bfd_link_info *info) | |
7907 | { | |
7908 | if (! is_elf_hash_table (info->hash)) | |
7909 | return NULL; | |
7910 | return elf_hash_table (info)->runpath; | |
7911 | } | |
7912 | ||
7913 | /* Get the name actually used for a dynamic object for a link. This | |
7914 | is the SONAME entry if there is one. Otherwise, it is the string | |
7915 | passed to bfd_elf_set_dt_needed_name, or it is the filename. */ | |
7916 | ||
7917 | const char * | |
7918 | bfd_elf_get_dt_soname (bfd *abfd) | |
7919 | { | |
7920 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7921 | && bfd_get_format (abfd) == bfd_object) | |
7922 | return elf_dt_name (abfd); | |
7923 | return NULL; | |
7924 | } | |
7925 | ||
7926 | /* Get the list of DT_NEEDED entries from a BFD. This is a hook for | |
7927 | the ELF linker emulation code. */ | |
7928 | ||
7929 | bfd_boolean | |
7930 | bfd_elf_get_bfd_needed_list (bfd *abfd, | |
7931 | struct bfd_link_needed_list **pneeded) | |
7932 | { | |
7933 | asection *s; | |
7934 | bfd_byte *dynbuf = NULL; | |
cb33740c | 7935 | unsigned int elfsec; |
4d269e42 AM |
7936 | unsigned long shlink; |
7937 | bfd_byte *extdyn, *extdynend; | |
7938 | size_t extdynsize; | |
7939 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
7940 | ||
7941 | *pneeded = NULL; | |
7942 | ||
7943 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour | |
7944 | || bfd_get_format (abfd) != bfd_object) | |
7945 | return TRUE; | |
7946 | ||
7947 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
7948 | if (s == NULL || s->size == 0) | |
7949 | return TRUE; | |
7950 | ||
7951 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) | |
7952 | goto error_return; | |
7953 | ||
7954 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 7955 | if (elfsec == SHN_BAD) |
4d269e42 AM |
7956 | goto error_return; |
7957 | ||
7958 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
c152c796 | 7959 | |
4d269e42 AM |
7960 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
7961 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
7962 | ||
7963 | extdyn = dynbuf; | |
7964 | extdynend = extdyn + s->size; | |
7965 | for (; extdyn < extdynend; extdyn += extdynsize) | |
7966 | { | |
7967 | Elf_Internal_Dyn dyn; | |
7968 | ||
7969 | (*swap_dyn_in) (abfd, extdyn, &dyn); | |
7970 | ||
7971 | if (dyn.d_tag == DT_NULL) | |
7972 | break; | |
7973 | ||
7974 | if (dyn.d_tag == DT_NEEDED) | |
7975 | { | |
7976 | const char *string; | |
7977 | struct bfd_link_needed_list *l; | |
7978 | unsigned int tagv = dyn.d_un.d_val; | |
986f0783 | 7979 | size_t amt; |
4d269e42 AM |
7980 | |
7981 | string = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
7982 | if (string == NULL) | |
7983 | goto error_return; | |
7984 | ||
7985 | amt = sizeof *l; | |
a50b1753 | 7986 | l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4d269e42 AM |
7987 | if (l == NULL) |
7988 | goto error_return; | |
7989 | ||
7990 | l->by = abfd; | |
7991 | l->name = string; | |
7992 | l->next = *pneeded; | |
7993 | *pneeded = l; | |
7994 | } | |
7995 | } | |
7996 | ||
7997 | free (dynbuf); | |
7998 | ||
7999 | return TRUE; | |
8000 | ||
8001 | error_return: | |
c9594989 | 8002 | free (dynbuf); |
4d269e42 AM |
8003 | return FALSE; |
8004 | } | |
8005 | ||
8006 | struct elf_symbuf_symbol | |
8007 | { | |
8008 | unsigned long st_name; /* Symbol name, index in string tbl */ | |
8009 | unsigned char st_info; /* Type and binding attributes */ | |
8010 | unsigned char st_other; /* Visibilty, and target specific */ | |
8011 | }; | |
8012 | ||
8013 | struct elf_symbuf_head | |
8014 | { | |
8015 | struct elf_symbuf_symbol *ssym; | |
ef53be89 | 8016 | size_t count; |
4d269e42 AM |
8017 | unsigned int st_shndx; |
8018 | }; | |
8019 | ||
8020 | struct elf_symbol | |
8021 | { | |
8022 | union | |
8023 | { | |
8024 | Elf_Internal_Sym *isym; | |
8025 | struct elf_symbuf_symbol *ssym; | |
dcea6a95 | 8026 | void *p; |
4d269e42 AM |
8027 | } u; |
8028 | const char *name; | |
8029 | }; | |
8030 | ||
8031 | /* Sort references to symbols by ascending section number. */ | |
8032 | ||
8033 | static int | |
8034 | elf_sort_elf_symbol (const void *arg1, const void *arg2) | |
8035 | { | |
8036 | const Elf_Internal_Sym *s1 = *(const Elf_Internal_Sym **) arg1; | |
8037 | const Elf_Internal_Sym *s2 = *(const Elf_Internal_Sym **) arg2; | |
8038 | ||
dcea6a95 AM |
8039 | if (s1->st_shndx != s2->st_shndx) |
8040 | return s1->st_shndx > s2->st_shndx ? 1 : -1; | |
8041 | /* Final sort by the address of the sym in the symbuf ensures | |
8042 | a stable sort. */ | |
8043 | if (s1 != s2) | |
8044 | return s1 > s2 ? 1 : -1; | |
8045 | return 0; | |
4d269e42 AM |
8046 | } |
8047 | ||
8048 | static int | |
8049 | elf_sym_name_compare (const void *arg1, const void *arg2) | |
8050 | { | |
8051 | const struct elf_symbol *s1 = (const struct elf_symbol *) arg1; | |
8052 | const struct elf_symbol *s2 = (const struct elf_symbol *) arg2; | |
dcea6a95 AM |
8053 | int ret = strcmp (s1->name, s2->name); |
8054 | if (ret != 0) | |
8055 | return ret; | |
8056 | if (s1->u.p != s2->u.p) | |
8057 | return s1->u.p > s2->u.p ? 1 : -1; | |
8058 | return 0; | |
4d269e42 AM |
8059 | } |
8060 | ||
8061 | static struct elf_symbuf_head * | |
ef53be89 | 8062 | elf_create_symbuf (size_t symcount, Elf_Internal_Sym *isymbuf) |
4d269e42 | 8063 | { |
14b1c01e | 8064 | Elf_Internal_Sym **ind, **indbufend, **indbuf; |
4d269e42 AM |
8065 | struct elf_symbuf_symbol *ssym; |
8066 | struct elf_symbuf_head *ssymbuf, *ssymhead; | |
446f7ed5 | 8067 | size_t i, shndx_count, total_size, amt; |
4d269e42 | 8068 | |
446f7ed5 AM |
8069 | amt = symcount * sizeof (*indbuf); |
8070 | indbuf = (Elf_Internal_Sym **) bfd_malloc (amt); | |
4d269e42 AM |
8071 | if (indbuf == NULL) |
8072 | return NULL; | |
8073 | ||
8074 | for (ind = indbuf, i = 0; i < symcount; i++) | |
8075 | if (isymbuf[i].st_shndx != SHN_UNDEF) | |
8076 | *ind++ = &isymbuf[i]; | |
8077 | indbufend = ind; | |
8078 | ||
8079 | qsort (indbuf, indbufend - indbuf, sizeof (Elf_Internal_Sym *), | |
8080 | elf_sort_elf_symbol); | |
8081 | ||
8082 | shndx_count = 0; | |
8083 | if (indbufend > indbuf) | |
8084 | for (ind = indbuf, shndx_count++; ind < indbufend - 1; ind++) | |
8085 | if (ind[0]->st_shndx != ind[1]->st_shndx) | |
8086 | shndx_count++; | |
8087 | ||
3ae181ee L |
8088 | total_size = ((shndx_count + 1) * sizeof (*ssymbuf) |
8089 | + (indbufend - indbuf) * sizeof (*ssym)); | |
a50b1753 | 8090 | ssymbuf = (struct elf_symbuf_head *) bfd_malloc (total_size); |
4d269e42 AM |
8091 | if (ssymbuf == NULL) |
8092 | { | |
8093 | free (indbuf); | |
8094 | return NULL; | |
8095 | } | |
8096 | ||
3ae181ee | 8097 | ssym = (struct elf_symbuf_symbol *) (ssymbuf + shndx_count + 1); |
4d269e42 AM |
8098 | ssymbuf->ssym = NULL; |
8099 | ssymbuf->count = shndx_count; | |
8100 | ssymbuf->st_shndx = 0; | |
8101 | for (ssymhead = ssymbuf, ind = indbuf; ind < indbufend; ssym++, ind++) | |
8102 | { | |
8103 | if (ind == indbuf || ssymhead->st_shndx != (*ind)->st_shndx) | |
8104 | { | |
8105 | ssymhead++; | |
8106 | ssymhead->ssym = ssym; | |
8107 | ssymhead->count = 0; | |
8108 | ssymhead->st_shndx = (*ind)->st_shndx; | |
8109 | } | |
8110 | ssym->st_name = (*ind)->st_name; | |
8111 | ssym->st_info = (*ind)->st_info; | |
8112 | ssym->st_other = (*ind)->st_other; | |
8113 | ssymhead->count++; | |
8114 | } | |
ef53be89 | 8115 | BFD_ASSERT ((size_t) (ssymhead - ssymbuf) == shndx_count |
3ae181ee L |
8116 | && (((bfd_hostptr_t) ssym - (bfd_hostptr_t) ssymbuf) |
8117 | == total_size)); | |
4d269e42 AM |
8118 | |
8119 | free (indbuf); | |
8120 | return ssymbuf; | |
8121 | } | |
8122 | ||
8123 | /* Check if 2 sections define the same set of local and global | |
8124 | symbols. */ | |
8125 | ||
8f317e31 | 8126 | static bfd_boolean |
4d269e42 AM |
8127 | bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2, |
8128 | struct bfd_link_info *info) | |
8129 | { | |
8130 | bfd *bfd1, *bfd2; | |
8131 | const struct elf_backend_data *bed1, *bed2; | |
8132 | Elf_Internal_Shdr *hdr1, *hdr2; | |
ef53be89 | 8133 | size_t symcount1, symcount2; |
4d269e42 AM |
8134 | Elf_Internal_Sym *isymbuf1, *isymbuf2; |
8135 | struct elf_symbuf_head *ssymbuf1, *ssymbuf2; | |
8136 | Elf_Internal_Sym *isym, *isymend; | |
8137 | struct elf_symbol *symtable1 = NULL, *symtable2 = NULL; | |
ef53be89 | 8138 | size_t count1, count2, i; |
cb33740c | 8139 | unsigned int shndx1, shndx2; |
4d269e42 AM |
8140 | bfd_boolean result; |
8141 | ||
8142 | bfd1 = sec1->owner; | |
8143 | bfd2 = sec2->owner; | |
8144 | ||
4d269e42 AM |
8145 | /* Both sections have to be in ELF. */ |
8146 | if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour | |
8147 | || bfd_get_flavour (bfd2) != bfd_target_elf_flavour) | |
8148 | return FALSE; | |
8149 | ||
8150 | if (elf_section_type (sec1) != elf_section_type (sec2)) | |
8151 | return FALSE; | |
8152 | ||
4d269e42 AM |
8153 | shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1); |
8154 | shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2); | |
cb33740c | 8155 | if (shndx1 == SHN_BAD || shndx2 == SHN_BAD) |
4d269e42 AM |
8156 | return FALSE; |
8157 | ||
8158 | bed1 = get_elf_backend_data (bfd1); | |
8159 | bed2 = get_elf_backend_data (bfd2); | |
8160 | hdr1 = &elf_tdata (bfd1)->symtab_hdr; | |
8161 | symcount1 = hdr1->sh_size / bed1->s->sizeof_sym; | |
8162 | hdr2 = &elf_tdata (bfd2)->symtab_hdr; | |
8163 | symcount2 = hdr2->sh_size / bed2->s->sizeof_sym; | |
8164 | ||
8165 | if (symcount1 == 0 || symcount2 == 0) | |
8166 | return FALSE; | |
8167 | ||
8168 | result = FALSE; | |
8169 | isymbuf1 = NULL; | |
8170 | isymbuf2 = NULL; | |
a50b1753 NC |
8171 | ssymbuf1 = (struct elf_symbuf_head *) elf_tdata (bfd1)->symbuf; |
8172 | ssymbuf2 = (struct elf_symbuf_head *) elf_tdata (bfd2)->symbuf; | |
4d269e42 AM |
8173 | |
8174 | if (ssymbuf1 == NULL) | |
8175 | { | |
8176 | isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0, | |
8177 | NULL, NULL, NULL); | |
8178 | if (isymbuf1 == NULL) | |
8179 | goto done; | |
8180 | ||
67411cbf | 8181 | if (info != NULL && !info->reduce_memory_overheads) |
dcea6a95 AM |
8182 | { |
8183 | ssymbuf1 = elf_create_symbuf (symcount1, isymbuf1); | |
8184 | elf_tdata (bfd1)->symbuf = ssymbuf1; | |
8185 | } | |
4d269e42 AM |
8186 | } |
8187 | ||
8188 | if (ssymbuf1 == NULL || ssymbuf2 == NULL) | |
8189 | { | |
8190 | isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0, | |
8191 | NULL, NULL, NULL); | |
8192 | if (isymbuf2 == NULL) | |
8193 | goto done; | |
8194 | ||
67411cbf | 8195 | if (ssymbuf1 != NULL && info != NULL && !info->reduce_memory_overheads) |
dcea6a95 AM |
8196 | { |
8197 | ssymbuf2 = elf_create_symbuf (symcount2, isymbuf2); | |
8198 | elf_tdata (bfd2)->symbuf = ssymbuf2; | |
8199 | } | |
4d269e42 AM |
8200 | } |
8201 | ||
8202 | if (ssymbuf1 != NULL && ssymbuf2 != NULL) | |
8203 | { | |
8204 | /* Optimized faster version. */ | |
ef53be89 | 8205 | size_t lo, hi, mid; |
4d269e42 AM |
8206 | struct elf_symbol *symp; |
8207 | struct elf_symbuf_symbol *ssym, *ssymend; | |
8208 | ||
8209 | lo = 0; | |
8210 | hi = ssymbuf1->count; | |
8211 | ssymbuf1++; | |
8212 | count1 = 0; | |
8213 | while (lo < hi) | |
8214 | { | |
8215 | mid = (lo + hi) / 2; | |
cb33740c | 8216 | if (shndx1 < ssymbuf1[mid].st_shndx) |
4d269e42 | 8217 | hi = mid; |
cb33740c | 8218 | else if (shndx1 > ssymbuf1[mid].st_shndx) |
4d269e42 AM |
8219 | lo = mid + 1; |
8220 | else | |
8221 | { | |
8222 | count1 = ssymbuf1[mid].count; | |
8223 | ssymbuf1 += mid; | |
8224 | break; | |
8225 | } | |
8226 | } | |
8227 | ||
8228 | lo = 0; | |
8229 | hi = ssymbuf2->count; | |
8230 | ssymbuf2++; | |
8231 | count2 = 0; | |
8232 | while (lo < hi) | |
8233 | { | |
8234 | mid = (lo + hi) / 2; | |
cb33740c | 8235 | if (shndx2 < ssymbuf2[mid].st_shndx) |
4d269e42 | 8236 | hi = mid; |
cb33740c | 8237 | else if (shndx2 > ssymbuf2[mid].st_shndx) |
4d269e42 AM |
8238 | lo = mid + 1; |
8239 | else | |
8240 | { | |
8241 | count2 = ssymbuf2[mid].count; | |
8242 | ssymbuf2 += mid; | |
8243 | break; | |
8244 | } | |
8245 | } | |
8246 | ||
8247 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
8248 | goto done; | |
8249 | ||
ca4be51c AM |
8250 | symtable1 |
8251 | = (struct elf_symbol *) bfd_malloc (count1 * sizeof (*symtable1)); | |
8252 | symtable2 | |
8253 | = (struct elf_symbol *) bfd_malloc (count2 * sizeof (*symtable2)); | |
4d269e42 AM |
8254 | if (symtable1 == NULL || symtable2 == NULL) |
8255 | goto done; | |
8256 | ||
8257 | symp = symtable1; | |
8258 | for (ssym = ssymbuf1->ssym, ssymend = ssym + count1; | |
8259 | ssym < ssymend; ssym++, symp++) | |
8260 | { | |
8261 | symp->u.ssym = ssym; | |
8262 | symp->name = bfd_elf_string_from_elf_section (bfd1, | |
8263 | hdr1->sh_link, | |
8264 | ssym->st_name); | |
8265 | } | |
8266 | ||
8267 | symp = symtable2; | |
8268 | for (ssym = ssymbuf2->ssym, ssymend = ssym + count2; | |
8269 | ssym < ssymend; ssym++, symp++) | |
8270 | { | |
8271 | symp->u.ssym = ssym; | |
8272 | symp->name = bfd_elf_string_from_elf_section (bfd2, | |
8273 | hdr2->sh_link, | |
8274 | ssym->st_name); | |
8275 | } | |
8276 | ||
8277 | /* Sort symbol by name. */ | |
8278 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
8279 | elf_sym_name_compare); | |
8280 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
8281 | elf_sym_name_compare); | |
8282 | ||
8283 | for (i = 0; i < count1; i++) | |
8284 | /* Two symbols must have the same binding, type and name. */ | |
8285 | if (symtable1 [i].u.ssym->st_info != symtable2 [i].u.ssym->st_info | |
8286 | || symtable1 [i].u.ssym->st_other != symtable2 [i].u.ssym->st_other | |
8287 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
8288 | goto done; | |
8289 | ||
8290 | result = TRUE; | |
8291 | goto done; | |
8292 | } | |
8293 | ||
a50b1753 NC |
8294 | symtable1 = (struct elf_symbol *) |
8295 | bfd_malloc (symcount1 * sizeof (struct elf_symbol)); | |
8296 | symtable2 = (struct elf_symbol *) | |
8297 | bfd_malloc (symcount2 * sizeof (struct elf_symbol)); | |
4d269e42 AM |
8298 | if (symtable1 == NULL || symtable2 == NULL) |
8299 | goto done; | |
8300 | ||
8301 | /* Count definitions in the section. */ | |
8302 | count1 = 0; | |
8303 | for (isym = isymbuf1, isymend = isym + symcount1; isym < isymend; isym++) | |
cb33740c | 8304 | if (isym->st_shndx == shndx1) |
4d269e42 AM |
8305 | symtable1[count1++].u.isym = isym; |
8306 | ||
8307 | count2 = 0; | |
8308 | for (isym = isymbuf2, isymend = isym + symcount2; isym < isymend; isym++) | |
cb33740c | 8309 | if (isym->st_shndx == shndx2) |
4d269e42 AM |
8310 | symtable2[count2++].u.isym = isym; |
8311 | ||
8312 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
8313 | goto done; | |
8314 | ||
8315 | for (i = 0; i < count1; i++) | |
8316 | symtable1[i].name | |
8317 | = bfd_elf_string_from_elf_section (bfd1, hdr1->sh_link, | |
8318 | symtable1[i].u.isym->st_name); | |
8319 | ||
8320 | for (i = 0; i < count2; i++) | |
8321 | symtable2[i].name | |
8322 | = bfd_elf_string_from_elf_section (bfd2, hdr2->sh_link, | |
8323 | symtable2[i].u.isym->st_name); | |
8324 | ||
8325 | /* Sort symbol by name. */ | |
8326 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
8327 | elf_sym_name_compare); | |
8328 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
8329 | elf_sym_name_compare); | |
8330 | ||
8331 | for (i = 0; i < count1; i++) | |
8332 | /* Two symbols must have the same binding, type and name. */ | |
8333 | if (symtable1 [i].u.isym->st_info != symtable2 [i].u.isym->st_info | |
8334 | || symtable1 [i].u.isym->st_other != symtable2 [i].u.isym->st_other | |
8335 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
8336 | goto done; | |
8337 | ||
8338 | result = TRUE; | |
8339 | ||
dc1e8a47 | 8340 | done: |
c9594989 AM |
8341 | free (symtable1); |
8342 | free (symtable2); | |
8343 | free (isymbuf1); | |
8344 | free (isymbuf2); | |
4d269e42 AM |
8345 | |
8346 | return result; | |
8347 | } | |
8348 | ||
8349 | /* Return TRUE if 2 section types are compatible. */ | |
8350 | ||
8351 | bfd_boolean | |
8352 | _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec, | |
8353 | bfd *bbfd, const asection *bsec) | |
8354 | { | |
8355 | if (asec == NULL | |
8356 | || bsec == NULL | |
8357 | || abfd->xvec->flavour != bfd_target_elf_flavour | |
8358 | || bbfd->xvec->flavour != bfd_target_elf_flavour) | |
8359 | return TRUE; | |
8360 | ||
8361 | return elf_section_type (asec) == elf_section_type (bsec); | |
8362 | } | |
8363 | \f | |
c152c796 AM |
8364 | /* Final phase of ELF linker. */ |
8365 | ||
8366 | /* A structure we use to avoid passing large numbers of arguments. */ | |
8367 | ||
8368 | struct elf_final_link_info | |
8369 | { | |
8370 | /* General link information. */ | |
8371 | struct bfd_link_info *info; | |
8372 | /* Output BFD. */ | |
8373 | bfd *output_bfd; | |
8374 | /* Symbol string table. */ | |
ef10c3ac | 8375 | struct elf_strtab_hash *symstrtab; |
c152c796 AM |
8376 | /* .hash section. */ |
8377 | asection *hash_sec; | |
8378 | /* symbol version section (.gnu.version). */ | |
8379 | asection *symver_sec; | |
8380 | /* Buffer large enough to hold contents of any section. */ | |
8381 | bfd_byte *contents; | |
8382 | /* Buffer large enough to hold external relocs of any section. */ | |
8383 | void *external_relocs; | |
8384 | /* Buffer large enough to hold internal relocs of any section. */ | |
8385 | Elf_Internal_Rela *internal_relocs; | |
8386 | /* Buffer large enough to hold external local symbols of any input | |
8387 | BFD. */ | |
8388 | bfd_byte *external_syms; | |
8389 | /* And a buffer for symbol section indices. */ | |
8390 | Elf_External_Sym_Shndx *locsym_shndx; | |
8391 | /* Buffer large enough to hold internal local symbols of any input | |
8392 | BFD. */ | |
8393 | Elf_Internal_Sym *internal_syms; | |
8394 | /* Array large enough to hold a symbol index for each local symbol | |
8395 | of any input BFD. */ | |
8396 | long *indices; | |
8397 | /* Array large enough to hold a section pointer for each local | |
8398 | symbol of any input BFD. */ | |
8399 | asection **sections; | |
ef10c3ac | 8400 | /* Buffer for SHT_SYMTAB_SHNDX section. */ |
c152c796 | 8401 | Elf_External_Sym_Shndx *symshndxbuf; |
ffbc01cc AM |
8402 | /* Number of STT_FILE syms seen. */ |
8403 | size_t filesym_count; | |
496afd17 L |
8404 | /* Local symbol hash table. */ |
8405 | struct bfd_hash_table local_hash_table; | |
c152c796 AM |
8406 | }; |
8407 | ||
496afd17 L |
8408 | struct local_hash_entry |
8409 | { | |
8410 | /* Base hash table entry structure. */ | |
8411 | struct bfd_hash_entry root; | |
8412 | /* Size of the local symbol name. */ | |
8413 | size_t size; | |
8414 | /* Number of the duplicated local symbol names. */ | |
8415 | long count; | |
8416 | }; | |
8417 | ||
8418 | /* Create an entry in the local symbol hash table. */ | |
8419 | ||
8420 | static struct bfd_hash_entry * | |
8421 | local_hash_newfunc (struct bfd_hash_entry *entry, | |
8422 | struct bfd_hash_table *table, | |
8423 | const char *string) | |
8424 | { | |
8425 | ||
8426 | /* Allocate the structure if it has not already been allocated by a | |
8427 | subclass. */ | |
8428 | if (entry == NULL) | |
8429 | { | |
8430 | entry = bfd_hash_allocate (table, | |
8431 | sizeof (struct local_hash_entry)); | |
8432 | if (entry == NULL) | |
8433 | return entry; | |
8434 | } | |
8435 | ||
8436 | /* Call the allocation method of the superclass. */ | |
8437 | entry = bfd_hash_newfunc (entry, table, string); | |
8438 | if (entry != NULL) | |
8439 | { | |
8440 | ((struct local_hash_entry *) entry)->count = 0; | |
8441 | ((struct local_hash_entry *) entry)->size = 0; | |
8442 | } | |
8443 | ||
8444 | return entry; | |
8445 | } | |
8446 | ||
c152c796 AM |
8447 | /* This struct is used to pass information to elf_link_output_extsym. */ |
8448 | ||
8449 | struct elf_outext_info | |
8450 | { | |
8451 | bfd_boolean failed; | |
8452 | bfd_boolean localsyms; | |
34a79995 | 8453 | bfd_boolean file_sym_done; |
8b127cbc | 8454 | struct elf_final_link_info *flinfo; |
c152c796 AM |
8455 | }; |
8456 | ||
d9352518 DB |
8457 | |
8458 | /* Support for evaluating a complex relocation. | |
8459 | ||
8460 | Complex relocations are generalized, self-describing relocations. The | |
8461 | implementation of them consists of two parts: complex symbols, and the | |
a0c8462f | 8462 | relocations themselves. |
d9352518 | 8463 | |
4b69ce9b | 8464 | The relocations use a reserved elf-wide relocation type code (R_RELC |
d9352518 DB |
8465 | external / BFD_RELOC_RELC internal) and an encoding of relocation field |
8466 | information (start bit, end bit, word width, etc) into the addend. This | |
8467 | information is extracted from CGEN-generated operand tables within gas. | |
8468 | ||
4b69ce9b | 8469 | Complex symbols are mangled symbols (STT_RELC external / BSF_RELC |
d9352518 DB |
8470 | internal) representing prefix-notation expressions, including but not |
8471 | limited to those sorts of expressions normally encoded as addends in the | |
8472 | addend field. The symbol mangling format is: | |
8473 | ||
8474 | <node> := <literal> | |
07d6d2b8 AM |
8475 | | <unary-operator> ':' <node> |
8476 | | <binary-operator> ':' <node> ':' <node> | |
d9352518 DB |
8477 | ; |
8478 | ||
8479 | <literal> := 's' <digits=N> ':' <N character symbol name> | |
07d6d2b8 | 8480 | | 'S' <digits=N> ':' <N character section name> |
d9352518 DB |
8481 | | '#' <hexdigits> |
8482 | ; | |
8483 | ||
8484 | <binary-operator> := as in C | |
8485 | <unary-operator> := as in C, plus "0-" for unambiguous negation. */ | |
8486 | ||
8487 | static void | |
a0c8462f AM |
8488 | set_symbol_value (bfd *bfd_with_globals, |
8489 | Elf_Internal_Sym *isymbuf, | |
8490 | size_t locsymcount, | |
8491 | size_t symidx, | |
8492 | bfd_vma val) | |
d9352518 | 8493 | { |
8977835c AM |
8494 | struct elf_link_hash_entry **sym_hashes; |
8495 | struct elf_link_hash_entry *h; | |
8496 | size_t extsymoff = locsymcount; | |
d9352518 | 8497 | |
8977835c | 8498 | if (symidx < locsymcount) |
d9352518 | 8499 | { |
8977835c AM |
8500 | Elf_Internal_Sym *sym; |
8501 | ||
8502 | sym = isymbuf + symidx; | |
8503 | if (ELF_ST_BIND (sym->st_info) == STB_LOCAL) | |
8504 | { | |
8505 | /* It is a local symbol: move it to the | |
8506 | "absolute" section and give it a value. */ | |
8507 | sym->st_shndx = SHN_ABS; | |
8508 | sym->st_value = val; | |
8509 | return; | |
8510 | } | |
8511 | BFD_ASSERT (elf_bad_symtab (bfd_with_globals)); | |
8512 | extsymoff = 0; | |
d9352518 | 8513 | } |
8977835c AM |
8514 | |
8515 | /* It is a global symbol: set its link type | |
8516 | to "defined" and give it a value. */ | |
8517 | ||
8518 | sym_hashes = elf_sym_hashes (bfd_with_globals); | |
8519 | h = sym_hashes [symidx - extsymoff]; | |
8520 | while (h->root.type == bfd_link_hash_indirect | |
8521 | || h->root.type == bfd_link_hash_warning) | |
8522 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8523 | h->root.type = bfd_link_hash_defined; | |
8524 | h->root.u.def.value = val; | |
8525 | h->root.u.def.section = bfd_abs_section_ptr; | |
d9352518 DB |
8526 | } |
8527 | ||
a0c8462f AM |
8528 | static bfd_boolean |
8529 | resolve_symbol (const char *name, | |
8530 | bfd *input_bfd, | |
8b127cbc | 8531 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
8532 | bfd_vma *result, |
8533 | Elf_Internal_Sym *isymbuf, | |
8534 | size_t locsymcount) | |
d9352518 | 8535 | { |
a0c8462f AM |
8536 | Elf_Internal_Sym *sym; |
8537 | struct bfd_link_hash_entry *global_entry; | |
8538 | const char *candidate = NULL; | |
8539 | Elf_Internal_Shdr *symtab_hdr; | |
8540 | size_t i; | |
8541 | ||
d9352518 DB |
8542 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
8543 | ||
8544 | for (i = 0; i < locsymcount; ++ i) | |
8545 | { | |
8977835c | 8546 | sym = isymbuf + i; |
d9352518 DB |
8547 | |
8548 | if (ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
8549 | continue; | |
8550 | ||
8551 | candidate = bfd_elf_string_from_elf_section (input_bfd, | |
8552 | symtab_hdr->sh_link, | |
8553 | sym->st_name); | |
8554 | #ifdef DEBUG | |
0f02bbd9 AM |
8555 | printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n", |
8556 | name, candidate, (unsigned long) sym->st_value); | |
d9352518 DB |
8557 | #endif |
8558 | if (candidate && strcmp (candidate, name) == 0) | |
8559 | { | |
8b127cbc | 8560 | asection *sec = flinfo->sections [i]; |
d9352518 | 8561 | |
0f02bbd9 AM |
8562 | *result = _bfd_elf_rel_local_sym (input_bfd, sym, &sec, 0); |
8563 | *result += sec->output_offset + sec->output_section->vma; | |
d9352518 | 8564 | #ifdef DEBUG |
0f02bbd9 AM |
8565 | printf ("Found symbol with value %8.8lx\n", |
8566 | (unsigned long) *result); | |
d9352518 DB |
8567 | #endif |
8568 | return TRUE; | |
8569 | } | |
8570 | } | |
8571 | ||
8572 | /* Hmm, haven't found it yet. perhaps it is a global. */ | |
8b127cbc | 8573 | global_entry = bfd_link_hash_lookup (flinfo->info->hash, name, |
a0c8462f | 8574 | FALSE, FALSE, TRUE); |
d9352518 DB |
8575 | if (!global_entry) |
8576 | return FALSE; | |
a0c8462f | 8577 | |
d9352518 DB |
8578 | if (global_entry->type == bfd_link_hash_defined |
8579 | || global_entry->type == bfd_link_hash_defweak) | |
8580 | { | |
a0c8462f AM |
8581 | *result = (global_entry->u.def.value |
8582 | + global_entry->u.def.section->output_section->vma | |
8583 | + global_entry->u.def.section->output_offset); | |
d9352518 | 8584 | #ifdef DEBUG |
0f02bbd9 AM |
8585 | printf ("Found GLOBAL symbol '%s' with value %8.8lx\n", |
8586 | global_entry->root.string, (unsigned long) *result); | |
d9352518 DB |
8587 | #endif |
8588 | return TRUE; | |
a0c8462f | 8589 | } |
d9352518 | 8590 | |
d9352518 DB |
8591 | return FALSE; |
8592 | } | |
8593 | ||
37b01f6a DG |
8594 | /* Looks up NAME in SECTIONS. If found sets RESULT to NAME's address (in |
8595 | bytes) and returns TRUE, otherwise returns FALSE. Accepts pseudo-section | |
8596 | names like "foo.end" which is the end address of section "foo". */ | |
07d6d2b8 | 8597 | |
d9352518 | 8598 | static bfd_boolean |
a0c8462f AM |
8599 | resolve_section (const char *name, |
8600 | asection *sections, | |
37b01f6a DG |
8601 | bfd_vma *result, |
8602 | bfd * abfd) | |
d9352518 | 8603 | { |
a0c8462f AM |
8604 | asection *curr; |
8605 | unsigned int len; | |
d9352518 | 8606 | |
a0c8462f | 8607 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
8608 | if (strcmp (curr->name, name) == 0) |
8609 | { | |
8610 | *result = curr->vma; | |
8611 | return TRUE; | |
8612 | } | |
8613 | ||
8614 | /* Hmm. still haven't found it. try pseudo-section names. */ | |
37b01f6a | 8615 | /* FIXME: This could be coded more efficiently... */ |
a0c8462f | 8616 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
8617 | { |
8618 | len = strlen (curr->name); | |
a0c8462f | 8619 | if (len > strlen (name)) |
d9352518 DB |
8620 | continue; |
8621 | ||
8622 | if (strncmp (curr->name, name, len) == 0) | |
8623 | { | |
8624 | if (strncmp (".end", name + len, 4) == 0) | |
8625 | { | |
61826503 | 8626 | *result = (curr->vma |
bb294208 | 8627 | + curr->size / bfd_octets_per_byte (abfd, curr)); |
d9352518 DB |
8628 | return TRUE; |
8629 | } | |
8630 | ||
8631 | /* Insert more pseudo-section names here, if you like. */ | |
8632 | } | |
8633 | } | |
a0c8462f | 8634 | |
d9352518 DB |
8635 | return FALSE; |
8636 | } | |
8637 | ||
8638 | static void | |
a0c8462f | 8639 | undefined_reference (const char *reftype, const char *name) |
d9352518 | 8640 | { |
695344c0 | 8641 | /* xgettext:c-format */ |
a0c8462f AM |
8642 | _bfd_error_handler (_("undefined %s reference in complex symbol: %s"), |
8643 | reftype, name); | |
4b69ce9b | 8644 | bfd_set_error (bfd_error_bad_value); |
d9352518 DB |
8645 | } |
8646 | ||
8647 | static bfd_boolean | |
a0c8462f AM |
8648 | eval_symbol (bfd_vma *result, |
8649 | const char **symp, | |
8650 | bfd *input_bfd, | |
8b127cbc | 8651 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
8652 | bfd_vma dot, |
8653 | Elf_Internal_Sym *isymbuf, | |
8654 | size_t locsymcount, | |
8655 | int signed_p) | |
d9352518 | 8656 | { |
4b93929b NC |
8657 | size_t len; |
8658 | size_t symlen; | |
a0c8462f AM |
8659 | bfd_vma a; |
8660 | bfd_vma b; | |
4b93929b | 8661 | char symbuf[4096]; |
0f02bbd9 | 8662 | const char *sym = *symp; |
a0c8462f AM |
8663 | const char *symend; |
8664 | bfd_boolean symbol_is_section = FALSE; | |
d9352518 DB |
8665 | |
8666 | len = strlen (sym); | |
8667 | symend = sym + len; | |
8668 | ||
4b93929b | 8669 | if (len < 1 || len > sizeof (symbuf)) |
d9352518 DB |
8670 | { |
8671 | bfd_set_error (bfd_error_invalid_operation); | |
8672 | return FALSE; | |
8673 | } | |
a0c8462f | 8674 | |
d9352518 DB |
8675 | switch (* sym) |
8676 | { | |
8677 | case '.': | |
0f02bbd9 AM |
8678 | *result = dot; |
8679 | *symp = sym + 1; | |
d9352518 DB |
8680 | return TRUE; |
8681 | ||
8682 | case '#': | |
0f02bbd9 AM |
8683 | ++sym; |
8684 | *result = strtoul (sym, (char **) symp, 16); | |
d9352518 DB |
8685 | return TRUE; |
8686 | ||
8687 | case 'S': | |
8688 | symbol_is_section = TRUE; | |
1a0670f3 | 8689 | /* Fall through. */ |
a0c8462f | 8690 | case 's': |
0f02bbd9 AM |
8691 | ++sym; |
8692 | symlen = strtol (sym, (char **) symp, 10); | |
8693 | sym = *symp + 1; /* Skip the trailing ':'. */ | |
d9352518 | 8694 | |
4b93929b | 8695 | if (symend < sym || symlen + 1 > sizeof (symbuf)) |
d9352518 DB |
8696 | { |
8697 | bfd_set_error (bfd_error_invalid_operation); | |
8698 | return FALSE; | |
8699 | } | |
8700 | ||
8701 | memcpy (symbuf, sym, symlen); | |
a0c8462f | 8702 | symbuf[symlen] = '\0'; |
0f02bbd9 | 8703 | *symp = sym + symlen; |
a0c8462f AM |
8704 | |
8705 | /* Is it always possible, with complex symbols, that gas "mis-guessed" | |
d9352518 DB |
8706 | the symbol as a section, or vice-versa. so we're pretty liberal in our |
8707 | interpretation here; section means "try section first", not "must be a | |
8708 | section", and likewise with symbol. */ | |
8709 | ||
a0c8462f | 8710 | if (symbol_is_section) |
d9352518 | 8711 | { |
37b01f6a | 8712 | if (!resolve_section (symbuf, flinfo->output_bfd->sections, result, input_bfd) |
8b127cbc | 8713 | && !resolve_symbol (symbuf, input_bfd, flinfo, result, |
8977835c | 8714 | isymbuf, locsymcount)) |
d9352518 DB |
8715 | { |
8716 | undefined_reference ("section", symbuf); | |
8717 | return FALSE; | |
8718 | } | |
a0c8462f AM |
8719 | } |
8720 | else | |
d9352518 | 8721 | { |
8b127cbc | 8722 | if (!resolve_symbol (symbuf, input_bfd, flinfo, result, |
8977835c | 8723 | isymbuf, locsymcount) |
8b127cbc | 8724 | && !resolve_section (symbuf, flinfo->output_bfd->sections, |
37b01f6a | 8725 | result, input_bfd)) |
d9352518 DB |
8726 | { |
8727 | undefined_reference ("symbol", symbuf); | |
8728 | return FALSE; | |
8729 | } | |
8730 | } | |
8731 | ||
8732 | return TRUE; | |
a0c8462f | 8733 | |
d9352518 DB |
8734 | /* All that remains are operators. */ |
8735 | ||
8736 | #define UNARY_OP(op) \ | |
8737 | if (strncmp (sym, #op, strlen (#op)) == 0) \ | |
8738 | { \ | |
8739 | sym += strlen (#op); \ | |
a0c8462f AM |
8740 | if (*sym == ':') \ |
8741 | ++sym; \ | |
0f02bbd9 | 8742 | *symp = sym; \ |
8b127cbc | 8743 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 8744 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f AM |
8745 | return FALSE; \ |
8746 | if (signed_p) \ | |
0f02bbd9 | 8747 | *result = op ((bfd_signed_vma) a); \ |
a0c8462f AM |
8748 | else \ |
8749 | *result = op a; \ | |
d9352518 DB |
8750 | return TRUE; \ |
8751 | } | |
8752 | ||
4b69ce9b | 8753 | #define BINARY_OP_HEAD(op) \ |
d9352518 DB |
8754 | if (strncmp (sym, #op, strlen (#op)) == 0) \ |
8755 | { \ | |
8756 | sym += strlen (#op); \ | |
a0c8462f AM |
8757 | if (*sym == ':') \ |
8758 | ++sym; \ | |
0f02bbd9 | 8759 | *symp = sym; \ |
8b127cbc | 8760 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 8761 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f | 8762 | return FALSE; \ |
0f02bbd9 | 8763 | ++*symp; \ |
8b127cbc | 8764 | if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 8765 | isymbuf, locsymcount, signed_p)) \ |
4b69ce9b AM |
8766 | return FALSE; |
8767 | #define BINARY_OP_TAIL(op) \ | |
a0c8462f | 8768 | if (signed_p) \ |
0f02bbd9 | 8769 | *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \ |
a0c8462f AM |
8770 | else \ |
8771 | *result = a op b; \ | |
d9352518 DB |
8772 | return TRUE; \ |
8773 | } | |
4b69ce9b | 8774 | #define BINARY_OP(op) BINARY_OP_HEAD(op) BINARY_OP_TAIL(op) |
d9352518 DB |
8775 | |
8776 | default: | |
8777 | UNARY_OP (0-); | |
4b69ce9b AM |
8778 | BINARY_OP_HEAD (<<); |
8779 | if (b >= sizeof (a) * CHAR_BIT) | |
8780 | { | |
8781 | *result = 0; | |
8782 | return TRUE; | |
8783 | } | |
8784 | signed_p = 0; | |
8785 | BINARY_OP_TAIL (<<); | |
8786 | BINARY_OP_HEAD (>>); | |
8787 | if (b >= sizeof (a) * CHAR_BIT) | |
8788 | { | |
8789 | *result = signed_p && (bfd_signed_vma) a < 0 ? -1 : 0; | |
8790 | return TRUE; | |
8791 | } | |
8792 | BINARY_OP_TAIL (>>); | |
d9352518 DB |
8793 | BINARY_OP (==); |
8794 | BINARY_OP (!=); | |
8795 | BINARY_OP (<=); | |
8796 | BINARY_OP (>=); | |
8797 | BINARY_OP (&&); | |
8798 | BINARY_OP (||); | |
8799 | UNARY_OP (~); | |
8800 | UNARY_OP (!); | |
8801 | BINARY_OP (*); | |
4b69ce9b AM |
8802 | BINARY_OP_HEAD (/); |
8803 | if (b == 0) | |
8804 | { | |
8805 | _bfd_error_handler (_("division by zero")); | |
8806 | bfd_set_error (bfd_error_bad_value); | |
8807 | return FALSE; | |
8808 | } | |
8809 | BINARY_OP_TAIL (/); | |
8810 | BINARY_OP_HEAD (%); | |
8811 | if (b == 0) | |
8812 | { | |
8813 | _bfd_error_handler (_("division by zero")); | |
8814 | bfd_set_error (bfd_error_bad_value); | |
8815 | return FALSE; | |
8816 | } | |
8817 | BINARY_OP_TAIL (%); | |
d9352518 DB |
8818 | BINARY_OP (^); |
8819 | BINARY_OP (|); | |
8820 | BINARY_OP (&); | |
8821 | BINARY_OP (+); | |
8822 | BINARY_OP (-); | |
8823 | BINARY_OP (<); | |
8824 | BINARY_OP (>); | |
8825 | #undef UNARY_OP | |
8826 | #undef BINARY_OP | |
8827 | _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym); | |
8828 | bfd_set_error (bfd_error_invalid_operation); | |
8829 | return FALSE; | |
8830 | } | |
8831 | } | |
8832 | ||
d9352518 | 8833 | static void |
a0c8462f AM |
8834 | put_value (bfd_vma size, |
8835 | unsigned long chunksz, | |
8836 | bfd *input_bfd, | |
8837 | bfd_vma x, | |
8838 | bfd_byte *location) | |
d9352518 DB |
8839 | { |
8840 | location += (size - chunksz); | |
8841 | ||
41cd1ad1 | 8842 | for (; size; size -= chunksz, location -= chunksz) |
d9352518 DB |
8843 | { |
8844 | switch (chunksz) | |
8845 | { | |
d9352518 DB |
8846 | case 1: |
8847 | bfd_put_8 (input_bfd, x, location); | |
41cd1ad1 | 8848 | x >>= 8; |
d9352518 DB |
8849 | break; |
8850 | case 2: | |
8851 | bfd_put_16 (input_bfd, x, location); | |
41cd1ad1 | 8852 | x >>= 16; |
d9352518 DB |
8853 | break; |
8854 | case 4: | |
8855 | bfd_put_32 (input_bfd, x, location); | |
65164438 NC |
8856 | /* Computed this way because x >>= 32 is undefined if x is a 32-bit value. */ |
8857 | x >>= 16; | |
8858 | x >>= 16; | |
d9352518 | 8859 | break; |
d9352518 | 8860 | #ifdef BFD64 |
41cd1ad1 | 8861 | case 8: |
d9352518 | 8862 | bfd_put_64 (input_bfd, x, location); |
41cd1ad1 NC |
8863 | /* Computed this way because x >>= 64 is undefined if x is a 64-bit value. */ |
8864 | x >>= 32; | |
8865 | x >>= 32; | |
8866 | break; | |
d9352518 | 8867 | #endif |
41cd1ad1 NC |
8868 | default: |
8869 | abort (); | |
d9352518 DB |
8870 | break; |
8871 | } | |
8872 | } | |
8873 | } | |
8874 | ||
a0c8462f AM |
8875 | static bfd_vma |
8876 | get_value (bfd_vma size, | |
8877 | unsigned long chunksz, | |
8878 | bfd *input_bfd, | |
8879 | bfd_byte *location) | |
d9352518 | 8880 | { |
9b239e0e | 8881 | int shift; |
d9352518 DB |
8882 | bfd_vma x = 0; |
8883 | ||
9b239e0e NC |
8884 | /* Sanity checks. */ |
8885 | BFD_ASSERT (chunksz <= sizeof (x) | |
8886 | && size >= chunksz | |
8887 | && chunksz != 0 | |
8888 | && (size % chunksz) == 0 | |
8889 | && input_bfd != NULL | |
8890 | && location != NULL); | |
8891 | ||
8892 | if (chunksz == sizeof (x)) | |
8893 | { | |
8894 | BFD_ASSERT (size == chunksz); | |
8895 | ||
8896 | /* Make sure that we do not perform an undefined shift operation. | |
8897 | We know that size == chunksz so there will only be one iteration | |
8898 | of the loop below. */ | |
8899 | shift = 0; | |
8900 | } | |
8901 | else | |
8902 | shift = 8 * chunksz; | |
8903 | ||
a0c8462f | 8904 | for (; size; size -= chunksz, location += chunksz) |
d9352518 DB |
8905 | { |
8906 | switch (chunksz) | |
8907 | { | |
d9352518 | 8908 | case 1: |
9b239e0e | 8909 | x = (x << shift) | bfd_get_8 (input_bfd, location); |
d9352518 DB |
8910 | break; |
8911 | case 2: | |
9b239e0e | 8912 | x = (x << shift) | bfd_get_16 (input_bfd, location); |
d9352518 DB |
8913 | break; |
8914 | case 4: | |
9b239e0e | 8915 | x = (x << shift) | bfd_get_32 (input_bfd, location); |
d9352518 | 8916 | break; |
d9352518 | 8917 | #ifdef BFD64 |
9b239e0e NC |
8918 | case 8: |
8919 | x = (x << shift) | bfd_get_64 (input_bfd, location); | |
d9352518 | 8920 | break; |
9b239e0e NC |
8921 | #endif |
8922 | default: | |
8923 | abort (); | |
d9352518 DB |
8924 | } |
8925 | } | |
8926 | return x; | |
8927 | } | |
8928 | ||
a0c8462f AM |
8929 | static void |
8930 | decode_complex_addend (unsigned long *start, /* in bits */ | |
8931 | unsigned long *oplen, /* in bits */ | |
8932 | unsigned long *len, /* in bits */ | |
8933 | unsigned long *wordsz, /* in bytes */ | |
8934 | unsigned long *chunksz, /* in bytes */ | |
8935 | unsigned long *lsb0_p, | |
8936 | unsigned long *signed_p, | |
8937 | unsigned long *trunc_p, | |
8938 | unsigned long encoded) | |
d9352518 | 8939 | { |
07d6d2b8 AM |
8940 | * start = encoded & 0x3F; |
8941 | * len = (encoded >> 6) & 0x3F; | |
d9352518 DB |
8942 | * oplen = (encoded >> 12) & 0x3F; |
8943 | * wordsz = (encoded >> 18) & 0xF; | |
8944 | * chunksz = (encoded >> 22) & 0xF; | |
8945 | * lsb0_p = (encoded >> 27) & 1; | |
8946 | * signed_p = (encoded >> 28) & 1; | |
8947 | * trunc_p = (encoded >> 29) & 1; | |
8948 | } | |
8949 | ||
cdfeee4f | 8950 | bfd_reloc_status_type |
0f02bbd9 | 8951 | bfd_elf_perform_complex_relocation (bfd *input_bfd, |
bb294208 | 8952 | asection *input_section, |
0f02bbd9 AM |
8953 | bfd_byte *contents, |
8954 | Elf_Internal_Rela *rel, | |
8955 | bfd_vma relocation) | |
d9352518 | 8956 | { |
0f02bbd9 AM |
8957 | bfd_vma shift, x, mask; |
8958 | unsigned long start, oplen, len, wordsz, chunksz, lsb0_p, signed_p, trunc_p; | |
cdfeee4f | 8959 | bfd_reloc_status_type r; |
bb294208 | 8960 | bfd_size_type octets; |
d9352518 DB |
8961 | |
8962 | /* Perform this reloc, since it is complex. | |
8963 | (this is not to say that it necessarily refers to a complex | |
8964 | symbol; merely that it is a self-describing CGEN based reloc. | |
8965 | i.e. the addend has the complete reloc information (bit start, end, | |
a0c8462f | 8966 | word size, etc) encoded within it.). */ |
d9352518 | 8967 | |
a0c8462f AM |
8968 | decode_complex_addend (&start, &oplen, &len, &wordsz, |
8969 | &chunksz, &lsb0_p, &signed_p, | |
8970 | &trunc_p, rel->r_addend); | |
d9352518 DB |
8971 | |
8972 | mask = (((1L << (len - 1)) - 1) << 1) | 1; | |
8973 | ||
8974 | if (lsb0_p) | |
8975 | shift = (start + 1) - len; | |
8976 | else | |
8977 | shift = (8 * wordsz) - (start + len); | |
8978 | ||
bb294208 AM |
8979 | octets = rel->r_offset * bfd_octets_per_byte (input_bfd, input_section); |
8980 | x = get_value (wordsz, chunksz, input_bfd, contents + octets); | |
d9352518 DB |
8981 | |
8982 | #ifdef DEBUG | |
8983 | printf ("Doing complex reloc: " | |
8984 | "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, " | |
8985 | "chunksz %ld, start %ld, len %ld, oplen %ld\n" | |
8986 | " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n", | |
8987 | lsb0_p, signed_p, trunc_p, wordsz, chunksz, start, len, | |
9ccb8af9 AM |
8988 | oplen, (unsigned long) x, (unsigned long) mask, |
8989 | (unsigned long) relocation); | |
d9352518 DB |
8990 | #endif |
8991 | ||
cdfeee4f | 8992 | r = bfd_reloc_ok; |
d9352518 | 8993 | if (! trunc_p) |
cdfeee4f AM |
8994 | /* Now do an overflow check. */ |
8995 | r = bfd_check_overflow ((signed_p | |
8996 | ? complain_overflow_signed | |
8997 | : complain_overflow_unsigned), | |
8998 | len, 0, (8 * wordsz), | |
8999 | relocation); | |
a0c8462f | 9000 | |
d9352518 DB |
9001 | /* Do the deed. */ |
9002 | x = (x & ~(mask << shift)) | ((relocation & mask) << shift); | |
9003 | ||
9004 | #ifdef DEBUG | |
9005 | printf (" relocation: %8.8lx\n" | |
9006 | " shifted mask: %8.8lx\n" | |
9007 | " shifted/masked reloc: %8.8lx\n" | |
9008 | " result: %8.8lx\n", | |
9ccb8af9 AM |
9009 | (unsigned long) relocation, (unsigned long) (mask << shift), |
9010 | (unsigned long) ((relocation & mask) << shift), (unsigned long) x); | |
d9352518 | 9011 | #endif |
bb294208 | 9012 | put_value (wordsz, chunksz, input_bfd, x, contents + octets); |
cdfeee4f | 9013 | return r; |
d9352518 DB |
9014 | } |
9015 | ||
0e287786 AM |
9016 | /* Functions to read r_offset from external (target order) reloc |
9017 | entry. Faster than bfd_getl32 et al, because we let the compiler | |
9018 | know the value is aligned. */ | |
53df40a4 | 9019 | |
0e287786 AM |
9020 | static bfd_vma |
9021 | ext32l_r_offset (const void *p) | |
53df40a4 AM |
9022 | { |
9023 | union aligned32 | |
9024 | { | |
9025 | uint32_t v; | |
9026 | unsigned char c[4]; | |
9027 | }; | |
9028 | const union aligned32 *a | |
0e287786 | 9029 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
9030 | |
9031 | uint32_t aval = ( (uint32_t) a->c[0] | |
9032 | | (uint32_t) a->c[1] << 8 | |
9033 | | (uint32_t) a->c[2] << 16 | |
9034 | | (uint32_t) a->c[3] << 24); | |
0e287786 | 9035 | return aval; |
53df40a4 AM |
9036 | } |
9037 | ||
0e287786 AM |
9038 | static bfd_vma |
9039 | ext32b_r_offset (const void *p) | |
53df40a4 AM |
9040 | { |
9041 | union aligned32 | |
9042 | { | |
9043 | uint32_t v; | |
9044 | unsigned char c[4]; | |
9045 | }; | |
9046 | const union aligned32 *a | |
0e287786 | 9047 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
9048 | |
9049 | uint32_t aval = ( (uint32_t) a->c[0] << 24 | |
9050 | | (uint32_t) a->c[1] << 16 | |
9051 | | (uint32_t) a->c[2] << 8 | |
9052 | | (uint32_t) a->c[3]); | |
0e287786 | 9053 | return aval; |
53df40a4 AM |
9054 | } |
9055 | ||
9056 | #ifdef BFD_HOST_64_BIT | |
0e287786 AM |
9057 | static bfd_vma |
9058 | ext64l_r_offset (const void *p) | |
53df40a4 AM |
9059 | { |
9060 | union aligned64 | |
9061 | { | |
9062 | uint64_t v; | |
9063 | unsigned char c[8]; | |
9064 | }; | |
9065 | const union aligned64 *a | |
0e287786 | 9066 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
9067 | |
9068 | uint64_t aval = ( (uint64_t) a->c[0] | |
9069 | | (uint64_t) a->c[1] << 8 | |
9070 | | (uint64_t) a->c[2] << 16 | |
9071 | | (uint64_t) a->c[3] << 24 | |
9072 | | (uint64_t) a->c[4] << 32 | |
9073 | | (uint64_t) a->c[5] << 40 | |
9074 | | (uint64_t) a->c[6] << 48 | |
9075 | | (uint64_t) a->c[7] << 56); | |
0e287786 | 9076 | return aval; |
53df40a4 AM |
9077 | } |
9078 | ||
0e287786 AM |
9079 | static bfd_vma |
9080 | ext64b_r_offset (const void *p) | |
53df40a4 AM |
9081 | { |
9082 | union aligned64 | |
9083 | { | |
9084 | uint64_t v; | |
9085 | unsigned char c[8]; | |
9086 | }; | |
9087 | const union aligned64 *a | |
0e287786 | 9088 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
9089 | |
9090 | uint64_t aval = ( (uint64_t) a->c[0] << 56 | |
9091 | | (uint64_t) a->c[1] << 48 | |
9092 | | (uint64_t) a->c[2] << 40 | |
9093 | | (uint64_t) a->c[3] << 32 | |
9094 | | (uint64_t) a->c[4] << 24 | |
9095 | | (uint64_t) a->c[5] << 16 | |
9096 | | (uint64_t) a->c[6] << 8 | |
9097 | | (uint64_t) a->c[7]); | |
0e287786 | 9098 | return aval; |
53df40a4 AM |
9099 | } |
9100 | #endif | |
9101 | ||
c152c796 AM |
9102 | /* When performing a relocatable link, the input relocations are |
9103 | preserved. But, if they reference global symbols, the indices | |
d4730f92 BS |
9104 | referenced must be updated. Update all the relocations found in |
9105 | RELDATA. */ | |
c152c796 | 9106 | |
bca6d0e3 | 9107 | static bfd_boolean |
c152c796 | 9108 | elf_link_adjust_relocs (bfd *abfd, |
9eaff861 | 9109 | asection *sec, |
28dbcedc | 9110 | struct bfd_elf_section_reloc_data *reldata, |
10bbbc1d NC |
9111 | bfd_boolean sort, |
9112 | struct bfd_link_info *info) | |
c152c796 AM |
9113 | { |
9114 | unsigned int i; | |
9115 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
9116 | bfd_byte *erela; | |
9117 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); | |
9118 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
9119 | bfd_vma r_type_mask; | |
9120 | int r_sym_shift; | |
d4730f92 BS |
9121 | unsigned int count = reldata->count; |
9122 | struct elf_link_hash_entry **rel_hash = reldata->hashes; | |
c152c796 | 9123 | |
d4730f92 | 9124 | if (reldata->hdr->sh_entsize == bed->s->sizeof_rel) |
c152c796 AM |
9125 | { |
9126 | swap_in = bed->s->swap_reloc_in; | |
9127 | swap_out = bed->s->swap_reloc_out; | |
9128 | } | |
d4730f92 | 9129 | else if (reldata->hdr->sh_entsize == bed->s->sizeof_rela) |
c152c796 AM |
9130 | { |
9131 | swap_in = bed->s->swap_reloca_in; | |
9132 | swap_out = bed->s->swap_reloca_out; | |
9133 | } | |
9134 | else | |
9135 | abort (); | |
9136 | ||
9137 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
9138 | abort (); | |
9139 | ||
9140 | if (bed->s->arch_size == 32) | |
9141 | { | |
9142 | r_type_mask = 0xff; | |
9143 | r_sym_shift = 8; | |
9144 | } | |
9145 | else | |
9146 | { | |
9147 | r_type_mask = 0xffffffff; | |
9148 | r_sym_shift = 32; | |
9149 | } | |
9150 | ||
d4730f92 BS |
9151 | erela = reldata->hdr->contents; |
9152 | for (i = 0; i < count; i++, rel_hash++, erela += reldata->hdr->sh_entsize) | |
c152c796 AM |
9153 | { |
9154 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; | |
9155 | unsigned int j; | |
9156 | ||
9157 | if (*rel_hash == NULL) | |
9158 | continue; | |
9159 | ||
10bbbc1d NC |
9160 | if ((*rel_hash)->indx == -2 |
9161 | && info->gc_sections | |
9162 | && ! info->gc_keep_exported) | |
9163 | { | |
9164 | /* PR 21524: Let the user know if a symbol was removed by garbage collection. */ | |
9793eb77 | 9165 | _bfd_error_handler (_("%pB:%pA: error: relocation references symbol %s which was removed by garbage collection"), |
10bbbc1d NC |
9166 | abfd, sec, |
9167 | (*rel_hash)->root.root.string); | |
9793eb77 | 9168 | _bfd_error_handler (_("%pB:%pA: error: try relinking with --gc-keep-exported enabled"), |
d42c267e | 9169 | abfd, sec); |
10bbbc1d NC |
9170 | bfd_set_error (bfd_error_invalid_operation); |
9171 | return FALSE; | |
9172 | } | |
c152c796 AM |
9173 | BFD_ASSERT ((*rel_hash)->indx >= 0); |
9174 | ||
9175 | (*swap_in) (abfd, erela, irela); | |
9176 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
9177 | irela[j].r_info = ((bfd_vma) (*rel_hash)->indx << r_sym_shift | |
9178 | | (irela[j].r_info & r_type_mask)); | |
9179 | (*swap_out) (abfd, irela, erela); | |
9180 | } | |
53df40a4 | 9181 | |
9eaff861 AO |
9182 | if (bed->elf_backend_update_relocs) |
9183 | (*bed->elf_backend_update_relocs) (sec, reldata); | |
9184 | ||
0e287786 | 9185 | if (sort && count != 0) |
53df40a4 | 9186 | { |
0e287786 AM |
9187 | bfd_vma (*ext_r_off) (const void *); |
9188 | bfd_vma r_off; | |
9189 | size_t elt_size; | |
9190 | bfd_byte *base, *end, *p, *loc; | |
bca6d0e3 | 9191 | bfd_byte *buf = NULL; |
28dbcedc AM |
9192 | |
9193 | if (bed->s->arch_size == 32) | |
9194 | { | |
9195 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) | |
0e287786 | 9196 | ext_r_off = ext32l_r_offset; |
28dbcedc | 9197 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 9198 | ext_r_off = ext32b_r_offset; |
28dbcedc AM |
9199 | else |
9200 | abort (); | |
9201 | } | |
53df40a4 | 9202 | else |
28dbcedc | 9203 | { |
53df40a4 | 9204 | #ifdef BFD_HOST_64_BIT |
28dbcedc | 9205 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) |
0e287786 | 9206 | ext_r_off = ext64l_r_offset; |
28dbcedc | 9207 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 9208 | ext_r_off = ext64b_r_offset; |
28dbcedc | 9209 | else |
53df40a4 | 9210 | #endif |
28dbcedc AM |
9211 | abort (); |
9212 | } | |
0e287786 | 9213 | |
bca6d0e3 AM |
9214 | /* Must use a stable sort here. A modified insertion sort, |
9215 | since the relocs are mostly sorted already. */ | |
0e287786 AM |
9216 | elt_size = reldata->hdr->sh_entsize; |
9217 | base = reldata->hdr->contents; | |
9218 | end = base + count * elt_size; | |
bca6d0e3 | 9219 | if (elt_size > sizeof (Elf64_External_Rela)) |
0e287786 AM |
9220 | abort (); |
9221 | ||
9222 | /* Ensure the first element is lowest. This acts as a sentinel, | |
9223 | speeding the main loop below. */ | |
9224 | r_off = (*ext_r_off) (base); | |
9225 | for (p = loc = base; (p += elt_size) < end; ) | |
9226 | { | |
9227 | bfd_vma r_off2 = (*ext_r_off) (p); | |
9228 | if (r_off > r_off2) | |
9229 | { | |
9230 | r_off = r_off2; | |
9231 | loc = p; | |
9232 | } | |
9233 | } | |
9234 | if (loc != base) | |
9235 | { | |
9236 | /* Don't just swap *base and *loc as that changes the order | |
9237 | of the original base[0] and base[1] if they happen to | |
9238 | have the same r_offset. */ | |
bca6d0e3 AM |
9239 | bfd_byte onebuf[sizeof (Elf64_External_Rela)]; |
9240 | memcpy (onebuf, loc, elt_size); | |
0e287786 | 9241 | memmove (base + elt_size, base, loc - base); |
bca6d0e3 | 9242 | memcpy (base, onebuf, elt_size); |
0e287786 AM |
9243 | } |
9244 | ||
b29b8669 | 9245 | for (p = base + elt_size; (p += elt_size) < end; ) |
0e287786 AM |
9246 | { |
9247 | /* base to p is sorted, *p is next to insert. */ | |
9248 | r_off = (*ext_r_off) (p); | |
9249 | /* Search the sorted region for location to insert. */ | |
9250 | loc = p - elt_size; | |
9251 | while (r_off < (*ext_r_off) (loc)) | |
9252 | loc -= elt_size; | |
9253 | loc += elt_size; | |
9254 | if (loc != p) | |
9255 | { | |
bca6d0e3 AM |
9256 | /* Chances are there is a run of relocs to insert here, |
9257 | from one of more input files. Files are not always | |
9258 | linked in order due to the way elf_link_input_bfd is | |
9259 | called. See pr17666. */ | |
9260 | size_t sortlen = p - loc; | |
9261 | bfd_vma r_off2 = (*ext_r_off) (loc); | |
9262 | size_t runlen = elt_size; | |
9263 | size_t buf_size = 96 * 1024; | |
9264 | while (p + runlen < end | |
9265 | && (sortlen <= buf_size | |
9266 | || runlen + elt_size <= buf_size) | |
9267 | && r_off2 > (*ext_r_off) (p + runlen)) | |
9268 | runlen += elt_size; | |
9269 | if (buf == NULL) | |
9270 | { | |
9271 | buf = bfd_malloc (buf_size); | |
9272 | if (buf == NULL) | |
9273 | return FALSE; | |
9274 | } | |
9275 | if (runlen < sortlen) | |
9276 | { | |
9277 | memcpy (buf, p, runlen); | |
9278 | memmove (loc + runlen, loc, sortlen); | |
9279 | memcpy (loc, buf, runlen); | |
9280 | } | |
9281 | else | |
9282 | { | |
9283 | memcpy (buf, loc, sortlen); | |
9284 | memmove (loc, p, runlen); | |
9285 | memcpy (loc + runlen, buf, sortlen); | |
9286 | } | |
b29b8669 | 9287 | p += runlen - elt_size; |
0e287786 AM |
9288 | } |
9289 | } | |
9290 | /* Hashes are no longer valid. */ | |
28dbcedc AM |
9291 | free (reldata->hashes); |
9292 | reldata->hashes = NULL; | |
bca6d0e3 | 9293 | free (buf); |
53df40a4 | 9294 | } |
bca6d0e3 | 9295 | return TRUE; |
c152c796 AM |
9296 | } |
9297 | ||
9298 | struct elf_link_sort_rela | |
9299 | { | |
9300 | union { | |
9301 | bfd_vma offset; | |
9302 | bfd_vma sym_mask; | |
9303 | } u; | |
9304 | enum elf_reloc_type_class type; | |
9305 | /* We use this as an array of size int_rels_per_ext_rel. */ | |
9306 | Elf_Internal_Rela rela[1]; | |
9307 | }; | |
9308 | ||
dcea6a95 AM |
9309 | /* qsort stability here and for cmp2 is only an issue if multiple |
9310 | dynamic relocations are emitted at the same address. But targets | |
9311 | that apply a series of dynamic relocations each operating on the | |
9312 | result of the prior relocation can't use -z combreloc as | |
9313 | implemented anyway. Such schemes tend to be broken by sorting on | |
9314 | symbol index. That leaves dynamic NONE relocs as the only other | |
9315 | case where ld might emit multiple relocs at the same address, and | |
9316 | those are only emitted due to target bugs. */ | |
9317 | ||
c152c796 AM |
9318 | static int |
9319 | elf_link_sort_cmp1 (const void *A, const void *B) | |
9320 | { | |
a50b1753 NC |
9321 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
9322 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 AM |
9323 | int relativea, relativeb; |
9324 | ||
9325 | relativea = a->type == reloc_class_relative; | |
9326 | relativeb = b->type == reloc_class_relative; | |
9327 | ||
9328 | if (relativea < relativeb) | |
9329 | return 1; | |
9330 | if (relativea > relativeb) | |
9331 | return -1; | |
9332 | if ((a->rela->r_info & a->u.sym_mask) < (b->rela->r_info & b->u.sym_mask)) | |
9333 | return -1; | |
9334 | if ((a->rela->r_info & a->u.sym_mask) > (b->rela->r_info & b->u.sym_mask)) | |
9335 | return 1; | |
9336 | if (a->rela->r_offset < b->rela->r_offset) | |
9337 | return -1; | |
9338 | if (a->rela->r_offset > b->rela->r_offset) | |
9339 | return 1; | |
9340 | return 0; | |
9341 | } | |
9342 | ||
9343 | static int | |
9344 | elf_link_sort_cmp2 (const void *A, const void *B) | |
9345 | { | |
a50b1753 NC |
9346 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
9347 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 | 9348 | |
7e612e98 | 9349 | if (a->type < b->type) |
c152c796 | 9350 | return -1; |
7e612e98 | 9351 | if (a->type > b->type) |
c152c796 | 9352 | return 1; |
7e612e98 | 9353 | if (a->u.offset < b->u.offset) |
c152c796 | 9354 | return -1; |
7e612e98 | 9355 | if (a->u.offset > b->u.offset) |
c152c796 AM |
9356 | return 1; |
9357 | if (a->rela->r_offset < b->rela->r_offset) | |
9358 | return -1; | |
9359 | if (a->rela->r_offset > b->rela->r_offset) | |
9360 | return 1; | |
9361 | return 0; | |
9362 | } | |
9363 | ||
9364 | static size_t | |
9365 | elf_link_sort_relocs (bfd *abfd, struct bfd_link_info *info, asection **psec) | |
9366 | { | |
3410fea8 | 9367 | asection *dynamic_relocs; |
fc66a176 L |
9368 | asection *rela_dyn; |
9369 | asection *rel_dyn; | |
c152c796 AM |
9370 | bfd_size_type count, size; |
9371 | size_t i, ret, sort_elt, ext_size; | |
9372 | bfd_byte *sort, *s_non_relative, *p; | |
9373 | struct elf_link_sort_rela *sq; | |
9374 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
9375 | int i2e = bed->s->int_rels_per_ext_rel; | |
61826503 | 9376 | unsigned int opb = bfd_octets_per_byte (abfd, NULL); |
c152c796 AM |
9377 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
9378 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
9379 | struct bfd_link_order *lo; | |
9380 | bfd_vma r_sym_mask; | |
3410fea8 | 9381 | bfd_boolean use_rela; |
c152c796 | 9382 | |
3410fea8 NC |
9383 | /* Find a dynamic reloc section. */ |
9384 | rela_dyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
9385 | rel_dyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
9386 | if (rela_dyn != NULL && rela_dyn->size > 0 | |
9387 | && rel_dyn != NULL && rel_dyn->size > 0) | |
c152c796 | 9388 | { |
3410fea8 NC |
9389 | bfd_boolean use_rela_initialised = FALSE; |
9390 | ||
9391 | /* This is just here to stop gcc from complaining. | |
c8e44c6d | 9392 | Its initialization checking code is not perfect. */ |
3410fea8 NC |
9393 | use_rela = TRUE; |
9394 | ||
9395 | /* Both sections are present. Examine the sizes | |
9396 | of the indirect sections to help us choose. */ | |
9397 | for (lo = rela_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
9398 | if (lo->type == bfd_indirect_link_order) | |
9399 | { | |
9400 | asection *o = lo->u.indirect.section; | |
9401 | ||
9402 | if ((o->size % bed->s->sizeof_rela) == 0) | |
9403 | { | |
9404 | if ((o->size % bed->s->sizeof_rel) == 0) | |
9405 | /* Section size is divisible by both rel and rela sizes. | |
9406 | It is of no help to us. */ | |
9407 | ; | |
9408 | else | |
9409 | { | |
9410 | /* Section size is only divisible by rela. */ | |
535b785f | 9411 | if (use_rela_initialised && !use_rela) |
3410fea8 | 9412 | { |
9793eb77 | 9413 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d AM |
9414 | "they are in more than one size"), |
9415 | abfd); | |
3410fea8 NC |
9416 | bfd_set_error (bfd_error_invalid_operation); |
9417 | return 0; | |
9418 | } | |
9419 | else | |
9420 | { | |
9421 | use_rela = TRUE; | |
9422 | use_rela_initialised = TRUE; | |
9423 | } | |
9424 | } | |
9425 | } | |
9426 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
9427 | { | |
9428 | /* Section size is only divisible by rel. */ | |
535b785f | 9429 | if (use_rela_initialised && use_rela) |
3410fea8 | 9430 | { |
9793eb77 | 9431 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d AM |
9432 | "they are in more than one size"), |
9433 | abfd); | |
3410fea8 NC |
9434 | bfd_set_error (bfd_error_invalid_operation); |
9435 | return 0; | |
9436 | } | |
9437 | else | |
9438 | { | |
9439 | use_rela = FALSE; | |
9440 | use_rela_initialised = TRUE; | |
9441 | } | |
9442 | } | |
9443 | else | |
9444 | { | |
c8e44c6d AM |
9445 | /* The section size is not divisible by either - |
9446 | something is wrong. */ | |
9793eb77 | 9447 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d | 9448 | "they are of an unknown size"), abfd); |
3410fea8 NC |
9449 | bfd_set_error (bfd_error_invalid_operation); |
9450 | return 0; | |
9451 | } | |
9452 | } | |
9453 | ||
9454 | for (lo = rel_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
9455 | if (lo->type == bfd_indirect_link_order) | |
9456 | { | |
9457 | asection *o = lo->u.indirect.section; | |
9458 | ||
9459 | if ((o->size % bed->s->sizeof_rela) == 0) | |
9460 | { | |
9461 | if ((o->size % bed->s->sizeof_rel) == 0) | |
9462 | /* Section size is divisible by both rel and rela sizes. | |
9463 | It is of no help to us. */ | |
9464 | ; | |
9465 | else | |
9466 | { | |
9467 | /* Section size is only divisible by rela. */ | |
535b785f | 9468 | if (use_rela_initialised && !use_rela) |
3410fea8 | 9469 | { |
9793eb77 | 9470 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d AM |
9471 | "they are in more than one size"), |
9472 | abfd); | |
3410fea8 NC |
9473 | bfd_set_error (bfd_error_invalid_operation); |
9474 | return 0; | |
9475 | } | |
9476 | else | |
9477 | { | |
9478 | use_rela = TRUE; | |
9479 | use_rela_initialised = TRUE; | |
9480 | } | |
9481 | } | |
9482 | } | |
9483 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
9484 | { | |
9485 | /* Section size is only divisible by rel. */ | |
535b785f | 9486 | if (use_rela_initialised && use_rela) |
3410fea8 | 9487 | { |
9793eb77 | 9488 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d AM |
9489 | "they are in more than one size"), |
9490 | abfd); | |
3410fea8 NC |
9491 | bfd_set_error (bfd_error_invalid_operation); |
9492 | return 0; | |
9493 | } | |
9494 | else | |
9495 | { | |
9496 | use_rela = FALSE; | |
9497 | use_rela_initialised = TRUE; | |
9498 | } | |
9499 | } | |
9500 | else | |
9501 | { | |
c8e44c6d AM |
9502 | /* The section size is not divisible by either - |
9503 | something is wrong. */ | |
9793eb77 | 9504 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d | 9505 | "they are of an unknown size"), abfd); |
3410fea8 NC |
9506 | bfd_set_error (bfd_error_invalid_operation); |
9507 | return 0; | |
9508 | } | |
9509 | } | |
9510 | ||
9511 | if (! use_rela_initialised) | |
9512 | /* Make a guess. */ | |
9513 | use_rela = TRUE; | |
c152c796 | 9514 | } |
fc66a176 L |
9515 | else if (rela_dyn != NULL && rela_dyn->size > 0) |
9516 | use_rela = TRUE; | |
9517 | else if (rel_dyn != NULL && rel_dyn->size > 0) | |
3410fea8 | 9518 | use_rela = FALSE; |
c152c796 | 9519 | else |
fc66a176 | 9520 | return 0; |
3410fea8 NC |
9521 | |
9522 | if (use_rela) | |
c152c796 | 9523 | { |
3410fea8 | 9524 | dynamic_relocs = rela_dyn; |
c152c796 AM |
9525 | ext_size = bed->s->sizeof_rela; |
9526 | swap_in = bed->s->swap_reloca_in; | |
9527 | swap_out = bed->s->swap_reloca_out; | |
9528 | } | |
3410fea8 NC |
9529 | else |
9530 | { | |
9531 | dynamic_relocs = rel_dyn; | |
9532 | ext_size = bed->s->sizeof_rel; | |
9533 | swap_in = bed->s->swap_reloc_in; | |
9534 | swap_out = bed->s->swap_reloc_out; | |
9535 | } | |
c152c796 AM |
9536 | |
9537 | size = 0; | |
3410fea8 | 9538 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 | 9539 | if (lo->type == bfd_indirect_link_order) |
3410fea8 | 9540 | size += lo->u.indirect.section->size; |
c152c796 | 9541 | |
3410fea8 | 9542 | if (size != dynamic_relocs->size) |
c152c796 AM |
9543 | return 0; |
9544 | ||
9545 | sort_elt = (sizeof (struct elf_link_sort_rela) | |
9546 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
3410fea8 NC |
9547 | |
9548 | count = dynamic_relocs->size / ext_size; | |
5e486aa1 NC |
9549 | if (count == 0) |
9550 | return 0; | |
a50b1753 | 9551 | sort = (bfd_byte *) bfd_zmalloc (sort_elt * count); |
3410fea8 | 9552 | |
c152c796 AM |
9553 | if (sort == NULL) |
9554 | { | |
9555 | (*info->callbacks->warning) | |
9793eb77 | 9556 | (info, _("not enough memory to sort relocations"), 0, abfd, 0, 0); |
c152c796 AM |
9557 | return 0; |
9558 | } | |
9559 | ||
9560 | if (bed->s->arch_size == 32) | |
9561 | r_sym_mask = ~(bfd_vma) 0xff; | |
9562 | else | |
9563 | r_sym_mask = ~(bfd_vma) 0xffffffff; | |
9564 | ||
3410fea8 | 9565 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
9566 | if (lo->type == bfd_indirect_link_order) |
9567 | { | |
9568 | bfd_byte *erel, *erelend; | |
9569 | asection *o = lo->u.indirect.section; | |
9570 | ||
1da212d6 AM |
9571 | if (o->contents == NULL && o->size != 0) |
9572 | { | |
9573 | /* This is a reloc section that is being handled as a normal | |
9574 | section. See bfd_section_from_shdr. We can't combine | |
9575 | relocs in this case. */ | |
9576 | free (sort); | |
9577 | return 0; | |
9578 | } | |
c152c796 | 9579 | erel = o->contents; |
eea6121a | 9580 | erelend = o->contents + o->size; |
c8e44c6d | 9581 | p = sort + o->output_offset * opb / ext_size * sort_elt; |
3410fea8 | 9582 | |
c152c796 AM |
9583 | while (erel < erelend) |
9584 | { | |
9585 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
3410fea8 | 9586 | |
c152c796 | 9587 | (*swap_in) (abfd, erel, s->rela); |
7e612e98 | 9588 | s->type = (*bed->elf_backend_reloc_type_class) (info, o, s->rela); |
c152c796 AM |
9589 | s->u.sym_mask = r_sym_mask; |
9590 | p += sort_elt; | |
9591 | erel += ext_size; | |
9592 | } | |
9593 | } | |
9594 | ||
9595 | qsort (sort, count, sort_elt, elf_link_sort_cmp1); | |
9596 | ||
9597 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
9598 | { | |
9599 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
9600 | if (s->type != reloc_class_relative) | |
9601 | break; | |
9602 | } | |
9603 | ret = i; | |
9604 | s_non_relative = p; | |
9605 | ||
9606 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
9607 | for (; i < count; i++, p += sort_elt) | |
9608 | { | |
9609 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
9610 | if (((sp->rela->r_info ^ sq->rela->r_info) & r_sym_mask) != 0) | |
9611 | sq = sp; | |
9612 | sp->u.offset = sq->rela->r_offset; | |
9613 | } | |
9614 | ||
9615 | qsort (s_non_relative, count - ret, sort_elt, elf_link_sort_cmp2); | |
9616 | ||
c8e44c6d AM |
9617 | struct elf_link_hash_table *htab = elf_hash_table (info); |
9618 | if (htab->srelplt && htab->srelplt->output_section == dynamic_relocs) | |
9619 | { | |
9620 | /* We have plt relocs in .rela.dyn. */ | |
9621 | sq = (struct elf_link_sort_rela *) sort; | |
9622 | for (i = 0; i < count; i++) | |
9623 | if (sq[count - i - 1].type != reloc_class_plt) | |
9624 | break; | |
9625 | if (i != 0 && htab->srelplt->size == i * ext_size) | |
9626 | { | |
9627 | struct bfd_link_order **plo; | |
9628 | /* Put srelplt link_order last. This is so the output_offset | |
9629 | set in the next loop is correct for DT_JMPREL. */ | |
9630 | for (plo = &dynamic_relocs->map_head.link_order; *plo != NULL; ) | |
9631 | if ((*plo)->type == bfd_indirect_link_order | |
9632 | && (*plo)->u.indirect.section == htab->srelplt) | |
9633 | { | |
9634 | lo = *plo; | |
9635 | *plo = lo->next; | |
9636 | } | |
9637 | else | |
9638 | plo = &(*plo)->next; | |
9639 | *plo = lo; | |
9640 | lo->next = NULL; | |
9641 | dynamic_relocs->map_tail.link_order = lo; | |
9642 | } | |
9643 | } | |
9644 | ||
9645 | p = sort; | |
3410fea8 | 9646 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
9647 | if (lo->type == bfd_indirect_link_order) |
9648 | { | |
9649 | bfd_byte *erel, *erelend; | |
9650 | asection *o = lo->u.indirect.section; | |
9651 | ||
9652 | erel = o->contents; | |
eea6121a | 9653 | erelend = o->contents + o->size; |
c8e44c6d | 9654 | o->output_offset = (p - sort) / sort_elt * ext_size / opb; |
c152c796 AM |
9655 | while (erel < erelend) |
9656 | { | |
9657 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
9658 | (*swap_out) (abfd, s->rela, erel); | |
9659 | p += sort_elt; | |
9660 | erel += ext_size; | |
9661 | } | |
9662 | } | |
9663 | ||
9664 | free (sort); | |
3410fea8 | 9665 | *psec = dynamic_relocs; |
c152c796 AM |
9666 | return ret; |
9667 | } | |
9668 | ||
ef10c3ac | 9669 | /* Add a symbol to the output symbol string table. */ |
c152c796 | 9670 | |
6e0b88f1 | 9671 | static int |
ef10c3ac L |
9672 | elf_link_output_symstrtab (struct elf_final_link_info *flinfo, |
9673 | const char *name, | |
9674 | Elf_Internal_Sym *elfsym, | |
9675 | asection *input_sec, | |
9676 | struct elf_link_hash_entry *h) | |
c152c796 | 9677 | { |
6e0b88f1 | 9678 | int (*output_symbol_hook) |
c152c796 AM |
9679 | (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *, |
9680 | struct elf_link_hash_entry *); | |
ef10c3ac | 9681 | struct elf_link_hash_table *hash_table; |
c152c796 | 9682 | const struct elf_backend_data *bed; |
ef10c3ac | 9683 | bfd_size_type strtabsize; |
c152c796 | 9684 | |
8539e4e8 AM |
9685 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); |
9686 | ||
8b127cbc | 9687 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 AM |
9688 | output_symbol_hook = bed->elf_backend_link_output_symbol_hook; |
9689 | if (output_symbol_hook != NULL) | |
9690 | { | |
8b127cbc | 9691 | int ret = (*output_symbol_hook) (flinfo->info, name, elfsym, input_sec, h); |
6e0b88f1 AM |
9692 | if (ret != 1) |
9693 | return ret; | |
c152c796 AM |
9694 | } |
9695 | ||
06f44071 AM |
9696 | if (ELF_ST_TYPE (elfsym->st_info) == STT_GNU_IFUNC) |
9697 | elf_tdata (flinfo->output_bfd)->has_gnu_osabi |= elf_gnu_osabi_ifunc; | |
9698 | if (ELF_ST_BIND (elfsym->st_info) == STB_GNU_UNIQUE) | |
9699 | elf_tdata (flinfo->output_bfd)->has_gnu_osabi |= elf_gnu_osabi_unique; | |
9700 | ||
ef10c3ac L |
9701 | if (name == NULL |
9702 | || *name == '\0' | |
9703 | || (input_sec->flags & SEC_EXCLUDE)) | |
9704 | elfsym->st_name = (unsigned long) -1; | |
c152c796 AM |
9705 | else |
9706 | { | |
ef10c3ac L |
9707 | /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize |
9708 | to get the final offset for st_name. */ | |
3f2e9699 | 9709 | char *versioned_name = (char *) name; |
496afd17 L |
9710 | if (h != NULL) |
9711 | { | |
9712 | if (h->versioned == versioned && h->def_dynamic) | |
9713 | { | |
9714 | /* Keep only one '@' for versioned symbols defined in | |
9715 | shared objects. */ | |
9716 | char *version = strrchr (name, ELF_VER_CHR); | |
9717 | char *base_end = strchr (name, ELF_VER_CHR); | |
9718 | if (version != base_end) | |
9719 | { | |
9720 | size_t base_len; | |
9721 | size_t len = strlen (name); | |
9722 | versioned_name = bfd_alloc (flinfo->output_bfd, len); | |
9723 | if (versioned_name == NULL) | |
9724 | return 0; | |
9725 | base_len = base_end - name; | |
9726 | memcpy (versioned_name, name, base_len); | |
9727 | memcpy (versioned_name + base_len, version, | |
9728 | len - base_len); | |
9729 | } | |
9730 | } | |
9731 | } | |
9732 | else if (flinfo->info->unique_symbol | |
9733 | && ELF_ST_BIND (elfsym->st_info) == STB_LOCAL) | |
3f2e9699 | 9734 | { |
496afd17 L |
9735 | struct local_hash_entry *lh; |
9736 | switch (ELF_ST_TYPE (elfsym->st_info)) | |
3f2e9699 | 9737 | { |
496afd17 L |
9738 | case STT_FILE: |
9739 | case STT_SECTION: | |
9740 | break; | |
9741 | default: | |
9742 | lh = (struct local_hash_entry *) bfd_hash_lookup | |
9743 | (&flinfo->local_hash_table, name, TRUE, FALSE); | |
9744 | if (lh == NULL) | |
3f2e9699 | 9745 | return 0; |
496afd17 L |
9746 | if (lh->count) |
9747 | { | |
9748 | /* Append ".COUNT" to duplicated local symbols. */ | |
9749 | size_t count_len; | |
9750 | size_t base_len = lh->size; | |
9751 | char buf[30]; | |
9752 | sprintf (buf, "%lx", lh->count); | |
9753 | if (!base_len) | |
9754 | { | |
9755 | base_len = strlen (name); | |
9756 | lh->size = base_len; | |
9757 | } | |
9758 | count_len = strlen (buf); | |
9759 | versioned_name = bfd_alloc (flinfo->output_bfd, | |
9760 | base_len + count_len + 2); | |
9761 | if (versioned_name == NULL) | |
9762 | return 0; | |
9763 | memcpy (versioned_name, name, base_len); | |
9764 | versioned_name[base_len] = '.'; | |
9765 | memcpy (versioned_name + base_len + 1, buf, | |
9766 | count_len + 1); | |
9767 | } | |
9768 | lh->count++; | |
9769 | break; | |
3f2e9699 L |
9770 | } |
9771 | } | |
ef10c3ac L |
9772 | elfsym->st_name |
9773 | = (unsigned long) _bfd_elf_strtab_add (flinfo->symstrtab, | |
3f2e9699 | 9774 | versioned_name, FALSE); |
c152c796 | 9775 | if (elfsym->st_name == (unsigned long) -1) |
6e0b88f1 | 9776 | return 0; |
c152c796 AM |
9777 | } |
9778 | ||
ef10c3ac L |
9779 | hash_table = elf_hash_table (flinfo->info); |
9780 | strtabsize = hash_table->strtabsize; | |
9781 | if (strtabsize <= hash_table->strtabcount) | |
c152c796 | 9782 | { |
ef10c3ac L |
9783 | strtabsize += strtabsize; |
9784 | hash_table->strtabsize = strtabsize; | |
9785 | strtabsize *= sizeof (*hash_table->strtab); | |
9786 | hash_table->strtab | |
9787 | = (struct elf_sym_strtab *) bfd_realloc (hash_table->strtab, | |
9788 | strtabsize); | |
9789 | if (hash_table->strtab == NULL) | |
6e0b88f1 | 9790 | return 0; |
c152c796 | 9791 | } |
ef10c3ac L |
9792 | hash_table->strtab[hash_table->strtabcount].sym = *elfsym; |
9793 | hash_table->strtab[hash_table->strtabcount].dest_index | |
9794 | = hash_table->strtabcount; | |
9795 | hash_table->strtab[hash_table->strtabcount].destshndx_index | |
9796 | = flinfo->symshndxbuf ? bfd_get_symcount (flinfo->output_bfd) : 0; | |
9797 | ||
ed48ec2e | 9798 | flinfo->output_bfd->symcount += 1; |
ef10c3ac L |
9799 | hash_table->strtabcount += 1; |
9800 | ||
9801 | return 1; | |
9802 | } | |
9803 | ||
9804 | /* Swap symbols out to the symbol table and flush the output symbols to | |
9805 | the file. */ | |
9806 | ||
9807 | static bfd_boolean | |
9808 | elf_link_swap_symbols_out (struct elf_final_link_info *flinfo) | |
9809 | { | |
9810 | struct elf_link_hash_table *hash_table = elf_hash_table (flinfo->info); | |
986f0783 | 9811 | size_t amt; |
ef53be89 | 9812 | size_t i; |
ef10c3ac L |
9813 | const struct elf_backend_data *bed; |
9814 | bfd_byte *symbuf; | |
9815 | Elf_Internal_Shdr *hdr; | |
9816 | file_ptr pos; | |
9817 | bfd_boolean ret; | |
9818 | ||
9819 | if (!hash_table->strtabcount) | |
9820 | return TRUE; | |
9821 | ||
9822 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); | |
9823 | ||
9824 | bed = get_elf_backend_data (flinfo->output_bfd); | |
c152c796 | 9825 | |
ef10c3ac L |
9826 | amt = bed->s->sizeof_sym * hash_table->strtabcount; |
9827 | symbuf = (bfd_byte *) bfd_malloc (amt); | |
9828 | if (symbuf == NULL) | |
9829 | return FALSE; | |
1b786873 | 9830 | |
ef10c3ac | 9831 | if (flinfo->symshndxbuf) |
c152c796 | 9832 | { |
ef53be89 AM |
9833 | amt = sizeof (Elf_External_Sym_Shndx); |
9834 | amt *= bfd_get_symcount (flinfo->output_bfd); | |
ef10c3ac L |
9835 | flinfo->symshndxbuf = (Elf_External_Sym_Shndx *) bfd_zmalloc (amt); |
9836 | if (flinfo->symshndxbuf == NULL) | |
c152c796 | 9837 | { |
ef10c3ac L |
9838 | free (symbuf); |
9839 | return FALSE; | |
c152c796 | 9840 | } |
c152c796 AM |
9841 | } |
9842 | ||
ef10c3ac L |
9843 | for (i = 0; i < hash_table->strtabcount; i++) |
9844 | { | |
9845 | struct elf_sym_strtab *elfsym = &hash_table->strtab[i]; | |
9846 | if (elfsym->sym.st_name == (unsigned long) -1) | |
9847 | elfsym->sym.st_name = 0; | |
9848 | else | |
9849 | elfsym->sym.st_name | |
9850 | = (unsigned long) _bfd_elf_strtab_offset (flinfo->symstrtab, | |
9851 | elfsym->sym.st_name); | |
9852 | bed->s->swap_symbol_out (flinfo->output_bfd, &elfsym->sym, | |
9853 | ((bfd_byte *) symbuf | |
9854 | + (elfsym->dest_index | |
9855 | * bed->s->sizeof_sym)), | |
9856 | (flinfo->symshndxbuf | |
9857 | + elfsym->destshndx_index)); | |
9858 | } | |
9859 | ||
1ff6de03 NA |
9860 | /* Allow the linker to examine the strtab and symtab now they are |
9861 | populated. */ | |
9862 | ||
9863 | if (flinfo->info->callbacks->examine_strtab) | |
9864 | flinfo->info->callbacks->examine_strtab (hash_table->strtab, | |
9865 | hash_table->strtabcount, | |
9866 | flinfo->symstrtab); | |
9867 | ||
ef10c3ac L |
9868 | hdr = &elf_tdata (flinfo->output_bfd)->symtab_hdr; |
9869 | pos = hdr->sh_offset + hdr->sh_size; | |
9870 | amt = hash_table->strtabcount * bed->s->sizeof_sym; | |
9871 | if (bfd_seek (flinfo->output_bfd, pos, SEEK_SET) == 0 | |
9872 | && bfd_bwrite (symbuf, amt, flinfo->output_bfd) == amt) | |
9873 | { | |
9874 | hdr->sh_size += amt; | |
9875 | ret = TRUE; | |
9876 | } | |
9877 | else | |
9878 | ret = FALSE; | |
c152c796 | 9879 | |
ef10c3ac L |
9880 | free (symbuf); |
9881 | ||
9882 | free (hash_table->strtab); | |
9883 | hash_table->strtab = NULL; | |
9884 | ||
9885 | return ret; | |
c152c796 AM |
9886 | } |
9887 | ||
c0d5a53d L |
9888 | /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */ |
9889 | ||
9890 | static bfd_boolean | |
9891 | check_dynsym (bfd *abfd, Elf_Internal_Sym *sym) | |
9892 | { | |
4fbb74a6 AM |
9893 | if (sym->st_shndx >= (SHN_LORESERVE & 0xffff) |
9894 | && sym->st_shndx < SHN_LORESERVE) | |
c0d5a53d L |
9895 | { |
9896 | /* The gABI doesn't support dynamic symbols in output sections | |
a0c8462f | 9897 | beyond 64k. */ |
4eca0228 | 9898 | _bfd_error_handler |
695344c0 | 9899 | /* xgettext:c-format */ |
9793eb77 | 9900 | (_("%pB: too many sections: %d (>= %d)"), |
4fbb74a6 | 9901 | abfd, bfd_count_sections (abfd), SHN_LORESERVE & 0xffff); |
c0d5a53d L |
9902 | bfd_set_error (bfd_error_nonrepresentable_section); |
9903 | return FALSE; | |
9904 | } | |
9905 | return TRUE; | |
9906 | } | |
9907 | ||
c152c796 AM |
9908 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
9909 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
9910 | versioned symbol that would normally require an explicit version. | |
9911 | We also handle the case that a DSO references a hidden symbol | |
9912 | which may be satisfied by a versioned symbol in another DSO. */ | |
9913 | ||
9914 | static bfd_boolean | |
9915 | elf_link_check_versioned_symbol (struct bfd_link_info *info, | |
9916 | const struct elf_backend_data *bed, | |
9917 | struct elf_link_hash_entry *h) | |
9918 | { | |
9919 | bfd *abfd; | |
9920 | struct elf_link_loaded_list *loaded; | |
9921 | ||
9922 | if (!is_elf_hash_table (info->hash)) | |
9923 | return FALSE; | |
9924 | ||
90c984fc L |
9925 | /* Check indirect symbol. */ |
9926 | while (h->root.type == bfd_link_hash_indirect) | |
9927 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9928 | ||
c152c796 AM |
9929 | switch (h->root.type) |
9930 | { | |
9931 | default: | |
9932 | abfd = NULL; | |
9933 | break; | |
9934 | ||
9935 | case bfd_link_hash_undefined: | |
9936 | case bfd_link_hash_undefweak: | |
9937 | abfd = h->root.u.undef.abfd; | |
f4ab0e2d L |
9938 | if (abfd == NULL |
9939 | || (abfd->flags & DYNAMIC) == 0 | |
e56f61be | 9940 | || (elf_dyn_lib_class (abfd) & DYN_DT_NEEDED) == 0) |
c152c796 AM |
9941 | return FALSE; |
9942 | break; | |
9943 | ||
9944 | case bfd_link_hash_defined: | |
9945 | case bfd_link_hash_defweak: | |
9946 | abfd = h->root.u.def.section->owner; | |
9947 | break; | |
9948 | ||
9949 | case bfd_link_hash_common: | |
9950 | abfd = h->root.u.c.p->section->owner; | |
9951 | break; | |
9952 | } | |
9953 | BFD_ASSERT (abfd != NULL); | |
9954 | ||
e310298c | 9955 | for (loaded = elf_hash_table (info)->dyn_loaded; |
c152c796 AM |
9956 | loaded != NULL; |
9957 | loaded = loaded->next) | |
9958 | { | |
9959 | bfd *input; | |
9960 | Elf_Internal_Shdr *hdr; | |
ef53be89 AM |
9961 | size_t symcount; |
9962 | size_t extsymcount; | |
9963 | size_t extsymoff; | |
c152c796 AM |
9964 | Elf_Internal_Shdr *versymhdr; |
9965 | Elf_Internal_Sym *isym; | |
9966 | Elf_Internal_Sym *isymend; | |
9967 | Elf_Internal_Sym *isymbuf; | |
9968 | Elf_External_Versym *ever; | |
9969 | Elf_External_Versym *extversym; | |
9970 | ||
9971 | input = loaded->abfd; | |
9972 | ||
9973 | /* We check each DSO for a possible hidden versioned definition. */ | |
9974 | if (input == abfd | |
c152c796 AM |
9975 | || elf_dynversym (input) == 0) |
9976 | continue; | |
9977 | ||
9978 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
9979 | ||
9980 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
9981 | if (elf_bad_symtab (input)) | |
9982 | { | |
9983 | extsymcount = symcount; | |
9984 | extsymoff = 0; | |
9985 | } | |
9986 | else | |
9987 | { | |
9988 | extsymcount = symcount - hdr->sh_info; | |
9989 | extsymoff = hdr->sh_info; | |
9990 | } | |
9991 | ||
9992 | if (extsymcount == 0) | |
9993 | continue; | |
9994 | ||
9995 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, | |
9996 | NULL, NULL, NULL); | |
9997 | if (isymbuf == NULL) | |
9998 | return FALSE; | |
9999 | ||
10000 | /* Read in any version definitions. */ | |
10001 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
c152c796 | 10002 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 |
2bb3687b AM |
10003 | || (extversym = (Elf_External_Versym *) |
10004 | _bfd_malloc_and_read (input, versymhdr->sh_size, | |
10005 | versymhdr->sh_size)) == NULL) | |
c152c796 | 10006 | { |
c152c796 AM |
10007 | free (isymbuf); |
10008 | return FALSE; | |
10009 | } | |
10010 | ||
10011 | ever = extversym + extsymoff; | |
10012 | isymend = isymbuf + extsymcount; | |
10013 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
10014 | { | |
10015 | const char *name; | |
10016 | Elf_Internal_Versym iver; | |
10017 | unsigned short version_index; | |
10018 | ||
10019 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL | |
10020 | || isym->st_shndx == SHN_UNDEF) | |
10021 | continue; | |
10022 | ||
10023 | name = bfd_elf_string_from_elf_section (input, | |
10024 | hdr->sh_link, | |
10025 | isym->st_name); | |
10026 | if (strcmp (name, h->root.root.string) != 0) | |
10027 | continue; | |
10028 | ||
10029 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
10030 | ||
d023c380 L |
10031 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 |
10032 | && !(h->def_regular | |
10033 | && h->forced_local)) | |
c152c796 AM |
10034 | { |
10035 | /* If we have a non-hidden versioned sym, then it should | |
d023c380 L |
10036 | have provided a definition for the undefined sym unless |
10037 | it is defined in a non-shared object and forced local. | |
10038 | */ | |
c152c796 AM |
10039 | abort (); |
10040 | } | |
10041 | ||
10042 | version_index = iver.vs_vers & VERSYM_VERSION; | |
10043 | if (version_index == 1 || version_index == 2) | |
10044 | { | |
10045 | /* This is the base or first version. We can use it. */ | |
10046 | free (extversym); | |
10047 | free (isymbuf); | |
10048 | return TRUE; | |
10049 | } | |
10050 | } | |
10051 | ||
10052 | free (extversym); | |
10053 | free (isymbuf); | |
10054 | } | |
10055 | ||
10056 | return FALSE; | |
10057 | } | |
10058 | ||
b8871f35 L |
10059 | /* Convert ELF common symbol TYPE. */ |
10060 | ||
10061 | static int | |
10062 | elf_link_convert_common_type (struct bfd_link_info *info, int type) | |
10063 | { | |
10064 | /* Commom symbol can only appear in relocatable link. */ | |
10065 | if (!bfd_link_relocatable (info)) | |
10066 | abort (); | |
10067 | switch (info->elf_stt_common) | |
10068 | { | |
10069 | case unchanged: | |
10070 | break; | |
10071 | case elf_stt_common: | |
10072 | type = STT_COMMON; | |
10073 | break; | |
10074 | case no_elf_stt_common: | |
10075 | type = STT_OBJECT; | |
10076 | break; | |
10077 | } | |
10078 | return type; | |
10079 | } | |
10080 | ||
c152c796 AM |
10081 | /* Add an external symbol to the symbol table. This is called from |
10082 | the hash table traversal routine. When generating a shared object, | |
10083 | we go through the symbol table twice. The first time we output | |
10084 | anything that might have been forced to local scope in a version | |
10085 | script. The second time we output the symbols that are still | |
10086 | global symbols. */ | |
10087 | ||
10088 | static bfd_boolean | |
7686d77d | 10089 | elf_link_output_extsym (struct bfd_hash_entry *bh, void *data) |
c152c796 | 10090 | { |
7686d77d | 10091 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; |
a50b1753 | 10092 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; |
8b127cbc | 10093 | struct elf_final_link_info *flinfo = eoinfo->flinfo; |
c152c796 AM |
10094 | bfd_boolean strip; |
10095 | Elf_Internal_Sym sym; | |
10096 | asection *input_sec; | |
10097 | const struct elf_backend_data *bed; | |
6e0b88f1 AM |
10098 | long indx; |
10099 | int ret; | |
b8871f35 | 10100 | unsigned int type; |
c152c796 AM |
10101 | |
10102 | if (h->root.type == bfd_link_hash_warning) | |
10103 | { | |
10104 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10105 | if (h->root.type == bfd_link_hash_new) | |
10106 | return TRUE; | |
10107 | } | |
10108 | ||
10109 | /* Decide whether to output this symbol in this pass. */ | |
10110 | if (eoinfo->localsyms) | |
10111 | { | |
4deb8f71 | 10112 | if (!h->forced_local) |
c152c796 AM |
10113 | return TRUE; |
10114 | } | |
10115 | else | |
10116 | { | |
4deb8f71 | 10117 | if (h->forced_local) |
c152c796 AM |
10118 | return TRUE; |
10119 | } | |
10120 | ||
8b127cbc | 10121 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 | 10122 | |
12ac1cf5 | 10123 | if (h->root.type == bfd_link_hash_undefined) |
c152c796 | 10124 | { |
12ac1cf5 NC |
10125 | /* If we have an undefined symbol reference here then it must have |
10126 | come from a shared library that is being linked in. (Undefined | |
98da7939 L |
10127 | references in regular files have already been handled unless |
10128 | they are in unreferenced sections which are removed by garbage | |
10129 | collection). */ | |
12ac1cf5 NC |
10130 | bfd_boolean ignore_undef = FALSE; |
10131 | ||
10132 | /* Some symbols may be special in that the fact that they're | |
10133 | undefined can be safely ignored - let backend determine that. */ | |
10134 | if (bed->elf_backend_ignore_undef_symbol) | |
10135 | ignore_undef = bed->elf_backend_ignore_undef_symbol (h); | |
10136 | ||
10137 | /* If we are reporting errors for this situation then do so now. */ | |
89a2ee5a | 10138 | if (!ignore_undef |
c54f1524 | 10139 | && h->ref_dynamic_nonweak |
8b127cbc AM |
10140 | && (!h->ref_regular || flinfo->info->gc_sections) |
10141 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h) | |
10142 | && flinfo->info->unresolved_syms_in_shared_libs != RM_IGNORE) | |
95a51568 FS |
10143 | { |
10144 | flinfo->info->callbacks->undefined_symbol | |
10145 | (flinfo->info, h->root.root.string, | |
10146 | h->ref_regular ? NULL : h->root.u.undef.abfd, NULL, 0, | |
10147 | flinfo->info->unresolved_syms_in_shared_libs == RM_DIAGNOSE | |
10148 | && !flinfo->info->warn_unresolved_syms); | |
10149 | } | |
97196564 L |
10150 | |
10151 | /* Strip a global symbol defined in a discarded section. */ | |
10152 | if (h->indx == -3) | |
10153 | return TRUE; | |
c152c796 AM |
10154 | } |
10155 | ||
10156 | /* We should also warn if a forced local symbol is referenced from | |
10157 | shared libraries. */ | |
0e1862bb | 10158 | if (bfd_link_executable (flinfo->info) |
f5385ebf AM |
10159 | && h->forced_local |
10160 | && h->ref_dynamic | |
371a5866 | 10161 | && h->def_regular |
f5385ebf | 10162 | && !h->dynamic_def |
ee659f1f | 10163 | && h->ref_dynamic_nonweak |
8b127cbc | 10164 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h)) |
c152c796 | 10165 | { |
17d078c5 AM |
10166 | bfd *def_bfd; |
10167 | const char *msg; | |
90c984fc L |
10168 | struct elf_link_hash_entry *hi = h; |
10169 | ||
10170 | /* Check indirect symbol. */ | |
10171 | while (hi->root.type == bfd_link_hash_indirect) | |
10172 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
17d078c5 AM |
10173 | |
10174 | if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
695344c0 | 10175 | /* xgettext:c-format */ |
871b3ab2 | 10176 | msg = _("%pB: internal symbol `%s' in %pB is referenced by DSO"); |
17d078c5 | 10177 | else if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) |
695344c0 | 10178 | /* xgettext:c-format */ |
871b3ab2 | 10179 | msg = _("%pB: hidden symbol `%s' in %pB is referenced by DSO"); |
17d078c5 | 10180 | else |
695344c0 | 10181 | /* xgettext:c-format */ |
871b3ab2 | 10182 | msg = _("%pB: local symbol `%s' in %pB is referenced by DSO"); |
8b127cbc | 10183 | def_bfd = flinfo->output_bfd; |
90c984fc L |
10184 | if (hi->root.u.def.section != bfd_abs_section_ptr) |
10185 | def_bfd = hi->root.u.def.section->owner; | |
c08bb8dd AM |
10186 | _bfd_error_handler (msg, flinfo->output_bfd, |
10187 | h->root.root.string, def_bfd); | |
17d078c5 | 10188 | bfd_set_error (bfd_error_bad_value); |
c152c796 AM |
10189 | eoinfo->failed = TRUE; |
10190 | return FALSE; | |
10191 | } | |
10192 | ||
10193 | /* We don't want to output symbols that have never been mentioned by | |
10194 | a regular file, or that we have been told to strip. However, if | |
10195 | h->indx is set to -2, the symbol is used by a reloc and we must | |
10196 | output it. */ | |
d983c8c5 | 10197 | strip = FALSE; |
c152c796 | 10198 | if (h->indx == -2) |
d983c8c5 | 10199 | ; |
f5385ebf | 10200 | else if ((h->def_dynamic |
77cfaee6 AM |
10201 | || h->ref_dynamic |
10202 | || h->root.type == bfd_link_hash_new) | |
f5385ebf AM |
10203 | && !h->def_regular |
10204 | && !h->ref_regular) | |
c152c796 | 10205 | strip = TRUE; |
8b127cbc | 10206 | else if (flinfo->info->strip == strip_all) |
c152c796 | 10207 | strip = TRUE; |
8b127cbc AM |
10208 | else if (flinfo->info->strip == strip_some |
10209 | && bfd_hash_lookup (flinfo->info->keep_hash, | |
c152c796 AM |
10210 | h->root.root.string, FALSE, FALSE) == NULL) |
10211 | strip = TRUE; | |
d56d55e7 AM |
10212 | else if ((h->root.type == bfd_link_hash_defined |
10213 | || h->root.type == bfd_link_hash_defweak) | |
8b127cbc | 10214 | && ((flinfo->info->strip_discarded |
dbaa2011 | 10215 | && discarded_section (h->root.u.def.section)) |
ca4be51c AM |
10216 | || ((h->root.u.def.section->flags & SEC_LINKER_CREATED) == 0 |
10217 | && h->root.u.def.section->owner != NULL | |
d56d55e7 | 10218 | && (h->root.u.def.section->owner->flags & BFD_PLUGIN) != 0))) |
c152c796 | 10219 | strip = TRUE; |
9e2278f5 AM |
10220 | else if ((h->root.type == bfd_link_hash_undefined |
10221 | || h->root.type == bfd_link_hash_undefweak) | |
10222 | && h->root.u.undef.abfd != NULL | |
10223 | && (h->root.u.undef.abfd->flags & BFD_PLUGIN) != 0) | |
10224 | strip = TRUE; | |
c152c796 | 10225 | |
b8871f35 L |
10226 | type = h->type; |
10227 | ||
c152c796 | 10228 | /* If we're stripping it, and it's not a dynamic symbol, there's |
d983c8c5 AM |
10229 | nothing else to do. However, if it is a forced local symbol or |
10230 | an ifunc symbol we need to give the backend finish_dynamic_symbol | |
10231 | function a chance to make it dynamic. */ | |
c152c796 AM |
10232 | if (strip |
10233 | && h->dynindx == -1 | |
b8871f35 | 10234 | && type != STT_GNU_IFUNC |
f5385ebf | 10235 | && !h->forced_local) |
c152c796 AM |
10236 | return TRUE; |
10237 | ||
10238 | sym.st_value = 0; | |
10239 | sym.st_size = h->size; | |
10240 | sym.st_other = h->other; | |
c152c796 AM |
10241 | switch (h->root.type) |
10242 | { | |
10243 | default: | |
10244 | case bfd_link_hash_new: | |
10245 | case bfd_link_hash_warning: | |
10246 | abort (); | |
10247 | return FALSE; | |
10248 | ||
10249 | case bfd_link_hash_undefined: | |
10250 | case bfd_link_hash_undefweak: | |
10251 | input_sec = bfd_und_section_ptr; | |
10252 | sym.st_shndx = SHN_UNDEF; | |
10253 | break; | |
10254 | ||
10255 | case bfd_link_hash_defined: | |
10256 | case bfd_link_hash_defweak: | |
10257 | { | |
10258 | input_sec = h->root.u.def.section; | |
10259 | if (input_sec->output_section != NULL) | |
10260 | { | |
10261 | sym.st_shndx = | |
8b127cbc | 10262 | _bfd_elf_section_from_bfd_section (flinfo->output_bfd, |
c152c796 AM |
10263 | input_sec->output_section); |
10264 | if (sym.st_shndx == SHN_BAD) | |
10265 | { | |
4eca0228 | 10266 | _bfd_error_handler |
695344c0 | 10267 | /* xgettext:c-format */ |
871b3ab2 | 10268 | (_("%pB: could not find output section %pA for input section %pA"), |
8b127cbc | 10269 | flinfo->output_bfd, input_sec->output_section, input_sec); |
17d078c5 | 10270 | bfd_set_error (bfd_error_nonrepresentable_section); |
c152c796 AM |
10271 | eoinfo->failed = TRUE; |
10272 | return FALSE; | |
10273 | } | |
10274 | ||
10275 | /* ELF symbols in relocatable files are section relative, | |
10276 | but in nonrelocatable files they are virtual | |
10277 | addresses. */ | |
10278 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
0e1862bb | 10279 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10280 | { |
10281 | sym.st_value += input_sec->output_section->vma; | |
10282 | if (h->type == STT_TLS) | |
10283 | { | |
8b127cbc | 10284 | asection *tls_sec = elf_hash_table (flinfo->info)->tls_sec; |
430a16a5 NC |
10285 | if (tls_sec != NULL) |
10286 | sym.st_value -= tls_sec->vma; | |
c152c796 AM |
10287 | } |
10288 | } | |
10289 | } | |
10290 | else | |
10291 | { | |
10292 | BFD_ASSERT (input_sec->owner == NULL | |
10293 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
10294 | sym.st_shndx = SHN_UNDEF; | |
10295 | input_sec = bfd_und_section_ptr; | |
10296 | } | |
10297 | } | |
10298 | break; | |
10299 | ||
10300 | case bfd_link_hash_common: | |
10301 | input_sec = h->root.u.c.p->section; | |
a4d8e49b | 10302 | sym.st_shndx = bed->common_section_index (input_sec); |
c152c796 AM |
10303 | sym.st_value = 1 << h->root.u.c.p->alignment_power; |
10304 | break; | |
10305 | ||
10306 | case bfd_link_hash_indirect: | |
10307 | /* These symbols are created by symbol versioning. They point | |
10308 | to the decorated version of the name. For example, if the | |
10309 | symbol foo@@GNU_1.2 is the default, which should be used when | |
10310 | foo is used with no version, then we add an indirect symbol | |
10311 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
10312 | since the indirected symbol is already in the hash table. */ | |
10313 | return TRUE; | |
10314 | } | |
10315 | ||
b8871f35 L |
10316 | if (type == STT_COMMON || type == STT_OBJECT) |
10317 | switch (h->root.type) | |
10318 | { | |
10319 | case bfd_link_hash_common: | |
10320 | type = elf_link_convert_common_type (flinfo->info, type); | |
10321 | break; | |
10322 | case bfd_link_hash_defined: | |
10323 | case bfd_link_hash_defweak: | |
10324 | if (bed->common_definition (&sym)) | |
10325 | type = elf_link_convert_common_type (flinfo->info, type); | |
10326 | else | |
10327 | type = STT_OBJECT; | |
10328 | break; | |
10329 | case bfd_link_hash_undefined: | |
10330 | case bfd_link_hash_undefweak: | |
10331 | break; | |
10332 | default: | |
10333 | abort (); | |
10334 | } | |
10335 | ||
4deb8f71 | 10336 | if (h->forced_local) |
b8871f35 L |
10337 | { |
10338 | sym.st_info = ELF_ST_INFO (STB_LOCAL, type); | |
10339 | /* Turn off visibility on local symbol. */ | |
10340 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); | |
10341 | } | |
10342 | /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */ | |
10343 | else if (h->unique_global && h->def_regular) | |
10344 | sym.st_info = ELF_ST_INFO (STB_GNU_UNIQUE, type); | |
10345 | else if (h->root.type == bfd_link_hash_undefweak | |
10346 | || h->root.type == bfd_link_hash_defweak) | |
10347 | sym.st_info = ELF_ST_INFO (STB_WEAK, type); | |
10348 | else | |
10349 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, type); | |
10350 | sym.st_target_internal = h->target_internal; | |
10351 | ||
c152c796 AM |
10352 | /* Give the processor backend a chance to tweak the symbol value, |
10353 | and also to finish up anything that needs to be done for this | |
10354 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for | |
3aa14d16 | 10355 | forced local syms when non-shared is due to a historical quirk. |
5f35ea9c | 10356 | STT_GNU_IFUNC symbol must go through PLT. */ |
3aa14d16 | 10357 | if ((h->type == STT_GNU_IFUNC |
5f35ea9c | 10358 | && h->def_regular |
0e1862bb | 10359 | && !bfd_link_relocatable (flinfo->info)) |
3aa14d16 L |
10360 | || ((h->dynindx != -1 |
10361 | || h->forced_local) | |
0e1862bb | 10362 | && ((bfd_link_pic (flinfo->info) |
3aa14d16 L |
10363 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
10364 | || h->root.type != bfd_link_hash_undefweak)) | |
10365 | || !h->forced_local) | |
8b127cbc | 10366 | && elf_hash_table (flinfo->info)->dynamic_sections_created)) |
c152c796 AM |
10367 | { |
10368 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
8b127cbc | 10369 | (flinfo->output_bfd, flinfo->info, h, &sym))) |
c152c796 AM |
10370 | { |
10371 | eoinfo->failed = TRUE; | |
10372 | return FALSE; | |
10373 | } | |
10374 | } | |
10375 | ||
10376 | /* If we are marking the symbol as undefined, and there are no | |
10377 | non-weak references to this symbol from a regular object, then | |
10378 | mark the symbol as weak undefined; if there are non-weak | |
10379 | references, mark the symbol as strong. We can't do this earlier, | |
10380 | because it might not be marked as undefined until the | |
10381 | finish_dynamic_symbol routine gets through with it. */ | |
10382 | if (sym.st_shndx == SHN_UNDEF | |
f5385ebf | 10383 | && h->ref_regular |
c152c796 AM |
10384 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
10385 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
10386 | { | |
10387 | int bindtype; | |
b8871f35 | 10388 | type = ELF_ST_TYPE (sym.st_info); |
2955ec4c L |
10389 | |
10390 | /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */ | |
10391 | if (type == STT_GNU_IFUNC) | |
10392 | type = STT_FUNC; | |
c152c796 | 10393 | |
f5385ebf | 10394 | if (h->ref_regular_nonweak) |
c152c796 AM |
10395 | bindtype = STB_GLOBAL; |
10396 | else | |
10397 | bindtype = STB_WEAK; | |
2955ec4c | 10398 | sym.st_info = ELF_ST_INFO (bindtype, type); |
c152c796 AM |
10399 | } |
10400 | ||
bda987c2 CD |
10401 | /* If this is a symbol defined in a dynamic library, don't use the |
10402 | symbol size from the dynamic library. Relinking an executable | |
10403 | against a new library may introduce gratuitous changes in the | |
10404 | executable's symbols if we keep the size. */ | |
10405 | if (sym.st_shndx == SHN_UNDEF | |
10406 | && !h->def_regular | |
10407 | && h->def_dynamic) | |
10408 | sym.st_size = 0; | |
10409 | ||
c152c796 AM |
10410 | /* If a non-weak symbol with non-default visibility is not defined |
10411 | locally, it is a fatal error. */ | |
0e1862bb | 10412 | if (!bfd_link_relocatable (flinfo->info) |
c152c796 AM |
10413 | && ELF_ST_VISIBILITY (sym.st_other) != STV_DEFAULT |
10414 | && ELF_ST_BIND (sym.st_info) != STB_WEAK | |
10415 | && h->root.type == bfd_link_hash_undefined | |
f5385ebf | 10416 | && !h->def_regular) |
c152c796 | 10417 | { |
17d078c5 AM |
10418 | const char *msg; |
10419 | ||
10420 | if (ELF_ST_VISIBILITY (sym.st_other) == STV_PROTECTED) | |
695344c0 | 10421 | /* xgettext:c-format */ |
871b3ab2 | 10422 | msg = _("%pB: protected symbol `%s' isn't defined"); |
17d078c5 | 10423 | else if (ELF_ST_VISIBILITY (sym.st_other) == STV_INTERNAL) |
695344c0 | 10424 | /* xgettext:c-format */ |
871b3ab2 | 10425 | msg = _("%pB: internal symbol `%s' isn't defined"); |
17d078c5 | 10426 | else |
695344c0 | 10427 | /* xgettext:c-format */ |
871b3ab2 | 10428 | msg = _("%pB: hidden symbol `%s' isn't defined"); |
4eca0228 | 10429 | _bfd_error_handler (msg, flinfo->output_bfd, h->root.root.string); |
17d078c5 | 10430 | bfd_set_error (bfd_error_bad_value); |
c152c796 AM |
10431 | eoinfo->failed = TRUE; |
10432 | return FALSE; | |
10433 | } | |
10434 | ||
10435 | /* If this symbol should be put in the .dynsym section, then put it | |
10436 | there now. We already know the symbol index. We also fill in | |
10437 | the entry in the .hash section. */ | |
1c2649ed EB |
10438 | if (h->dynindx != -1 |
10439 | && elf_hash_table (flinfo->info)->dynamic_sections_created | |
10440 | && elf_hash_table (flinfo->info)->dynsym != NULL | |
10441 | && !discarded_section (elf_hash_table (flinfo->info)->dynsym)) | |
c152c796 | 10442 | { |
c152c796 AM |
10443 | bfd_byte *esym; |
10444 | ||
90c984fc L |
10445 | /* Since there is no version information in the dynamic string, |
10446 | if there is no version info in symbol version section, we will | |
1659f720 | 10447 | have a run-time problem if not linking executable, referenced |
4deb8f71 | 10448 | by shared library, or not bound locally. */ |
1659f720 | 10449 | if (h->verinfo.verdef == NULL |
0e1862bb | 10450 | && (!bfd_link_executable (flinfo->info) |
1659f720 L |
10451 | || h->ref_dynamic |
10452 | || !h->def_regular)) | |
90c984fc L |
10453 | { |
10454 | char *p = strrchr (h->root.root.string, ELF_VER_CHR); | |
10455 | ||
10456 | if (p && p [1] != '\0') | |
10457 | { | |
4eca0228 | 10458 | _bfd_error_handler |
695344c0 | 10459 | /* xgettext:c-format */ |
9793eb77 | 10460 | (_("%pB: no symbol version section for versioned symbol `%s'"), |
90c984fc L |
10461 | flinfo->output_bfd, h->root.root.string); |
10462 | eoinfo->failed = TRUE; | |
10463 | return FALSE; | |
10464 | } | |
10465 | } | |
10466 | ||
c152c796 | 10467 | sym.st_name = h->dynstr_index; |
cae1fbbb L |
10468 | esym = (elf_hash_table (flinfo->info)->dynsym->contents |
10469 | + h->dynindx * bed->s->sizeof_sym); | |
8b127cbc | 10470 | if (!check_dynsym (flinfo->output_bfd, &sym)) |
c0d5a53d L |
10471 | { |
10472 | eoinfo->failed = TRUE; | |
10473 | return FALSE; | |
10474 | } | |
8b127cbc | 10475 | bed->s->swap_symbol_out (flinfo->output_bfd, &sym, esym, 0); |
c152c796 | 10476 | |
8b127cbc | 10477 | if (flinfo->hash_sec != NULL) |
fdc90cb4 JJ |
10478 | { |
10479 | size_t hash_entry_size; | |
10480 | bfd_byte *bucketpos; | |
10481 | bfd_vma chain; | |
41198d0c L |
10482 | size_t bucketcount; |
10483 | size_t bucket; | |
10484 | ||
8b127cbc | 10485 | bucketcount = elf_hash_table (flinfo->info)->bucketcount; |
41198d0c | 10486 | bucket = h->u.elf_hash_value % bucketcount; |
fdc90cb4 JJ |
10487 | |
10488 | hash_entry_size | |
8b127cbc AM |
10489 | = elf_section_data (flinfo->hash_sec)->this_hdr.sh_entsize; |
10490 | bucketpos = ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 | 10491 | + (bucket + 2) * hash_entry_size); |
8b127cbc AM |
10492 | chain = bfd_get (8 * hash_entry_size, flinfo->output_bfd, bucketpos); |
10493 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, h->dynindx, | |
10494 | bucketpos); | |
10495 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, chain, | |
10496 | ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 JJ |
10497 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); |
10498 | } | |
c152c796 | 10499 | |
8b127cbc | 10500 | if (flinfo->symver_sec != NULL && flinfo->symver_sec->contents != NULL) |
c152c796 AM |
10501 | { |
10502 | Elf_Internal_Versym iversym; | |
10503 | Elf_External_Versym *eversym; | |
10504 | ||
5fa370e4 | 10505 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
c152c796 | 10506 | { |
7b20f099 AM |
10507 | if (h->verinfo.verdef == NULL |
10508 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
10509 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
c152c796 AM |
10510 | iversym.vs_vers = 0; |
10511 | else | |
10512 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
10513 | } | |
10514 | else | |
10515 | { | |
10516 | if (h->verinfo.vertree == NULL) | |
10517 | iversym.vs_vers = 1; | |
10518 | else | |
10519 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
8b127cbc | 10520 | if (flinfo->info->create_default_symver) |
3e3b46e5 | 10521 | iversym.vs_vers++; |
c152c796 AM |
10522 | } |
10523 | ||
422f1182 | 10524 | /* Turn on VERSYM_HIDDEN only if the hidden versioned symbol is |
6e33951e | 10525 | defined locally. */ |
422f1182 | 10526 | if (h->versioned == versioned_hidden && h->def_regular) |
c152c796 AM |
10527 | iversym.vs_vers |= VERSYM_HIDDEN; |
10528 | ||
8b127cbc | 10529 | eversym = (Elf_External_Versym *) flinfo->symver_sec->contents; |
c152c796 | 10530 | eversym += h->dynindx; |
8b127cbc | 10531 | _bfd_elf_swap_versym_out (flinfo->output_bfd, &iversym, eversym); |
c152c796 AM |
10532 | } |
10533 | } | |
10534 | ||
d983c8c5 AM |
10535 | /* If the symbol is undefined, and we didn't output it to .dynsym, |
10536 | strip it from .symtab too. Obviously we can't do this for | |
10537 | relocatable output or when needed for --emit-relocs. */ | |
10538 | else if (input_sec == bfd_und_section_ptr | |
10539 | && h->indx != -2 | |
66cae560 NC |
10540 | /* PR 22319 Do not strip global undefined symbols marked as being needed. */ |
10541 | && (h->mark != 1 || ELF_ST_BIND (sym.st_info) != STB_GLOBAL) | |
0e1862bb | 10542 | && !bfd_link_relocatable (flinfo->info)) |
d983c8c5 | 10543 | return TRUE; |
66cae560 | 10544 | |
d983c8c5 AM |
10545 | /* Also strip others that we couldn't earlier due to dynamic symbol |
10546 | processing. */ | |
10547 | if (strip) | |
10548 | return TRUE; | |
10549 | if ((input_sec->flags & SEC_EXCLUDE) != 0) | |
c152c796 AM |
10550 | return TRUE; |
10551 | ||
2ec55de3 AM |
10552 | /* Output a FILE symbol so that following locals are not associated |
10553 | with the wrong input file. We need one for forced local symbols | |
10554 | if we've seen more than one FILE symbol or when we have exactly | |
10555 | one FILE symbol but global symbols are present in a file other | |
10556 | than the one with the FILE symbol. We also need one if linker | |
10557 | defined symbols are present. In practice these conditions are | |
10558 | always met, so just emit the FILE symbol unconditionally. */ | |
10559 | if (eoinfo->localsyms | |
10560 | && !eoinfo->file_sym_done | |
10561 | && eoinfo->flinfo->filesym_count != 0) | |
10562 | { | |
10563 | Elf_Internal_Sym fsym; | |
10564 | ||
10565 | memset (&fsym, 0, sizeof (fsym)); | |
10566 | fsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
10567 | fsym.st_shndx = SHN_ABS; | |
ef10c3ac L |
10568 | if (!elf_link_output_symstrtab (eoinfo->flinfo, NULL, &fsym, |
10569 | bfd_und_section_ptr, NULL)) | |
2ec55de3 AM |
10570 | return FALSE; |
10571 | ||
10572 | eoinfo->file_sym_done = TRUE; | |
10573 | } | |
10574 | ||
8b127cbc | 10575 | indx = bfd_get_symcount (flinfo->output_bfd); |
ef10c3ac L |
10576 | ret = elf_link_output_symstrtab (flinfo, h->root.root.string, &sym, |
10577 | input_sec, h); | |
6e0b88f1 | 10578 | if (ret == 0) |
c152c796 AM |
10579 | { |
10580 | eoinfo->failed = TRUE; | |
10581 | return FALSE; | |
10582 | } | |
6e0b88f1 AM |
10583 | else if (ret == 1) |
10584 | h->indx = indx; | |
10585 | else if (h->indx == -2) | |
10586 | abort(); | |
c152c796 AM |
10587 | |
10588 | return TRUE; | |
10589 | } | |
10590 | ||
cdd3575c AM |
10591 | /* Return TRUE if special handling is done for relocs in SEC against |
10592 | symbols defined in discarded sections. */ | |
10593 | ||
c152c796 AM |
10594 | static bfd_boolean |
10595 | elf_section_ignore_discarded_relocs (asection *sec) | |
10596 | { | |
10597 | const struct elf_backend_data *bed; | |
10598 | ||
cdd3575c AM |
10599 | switch (sec->sec_info_type) |
10600 | { | |
dbaa2011 AM |
10601 | case SEC_INFO_TYPE_STABS: |
10602 | case SEC_INFO_TYPE_EH_FRAME: | |
2f0c68f2 | 10603 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
cdd3575c AM |
10604 | return TRUE; |
10605 | default: | |
10606 | break; | |
10607 | } | |
c152c796 AM |
10608 | |
10609 | bed = get_elf_backend_data (sec->owner); | |
10610 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
10611 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
10612 | return TRUE; | |
10613 | ||
10614 | return FALSE; | |
10615 | } | |
10616 | ||
9e66c942 AM |
10617 | /* Return a mask saying how ld should treat relocations in SEC against |
10618 | symbols defined in discarded sections. If this function returns | |
10619 | COMPLAIN set, ld will issue a warning message. If this function | |
10620 | returns PRETEND set, and the discarded section was link-once and the | |
10621 | same size as the kept link-once section, ld will pretend that the | |
10622 | symbol was actually defined in the kept section. Otherwise ld will | |
10623 | zero the reloc (at least that is the intent, but some cooperation by | |
10624 | the target dependent code is needed, particularly for REL targets). */ | |
10625 | ||
8a696751 AM |
10626 | unsigned int |
10627 | _bfd_elf_default_action_discarded (asection *sec) | |
cdd3575c | 10628 | { |
9e66c942 | 10629 | if (sec->flags & SEC_DEBUGGING) |
69d54b1b | 10630 | return PRETEND; |
cdd3575c AM |
10631 | |
10632 | if (strcmp (".eh_frame", sec->name) == 0) | |
9e66c942 | 10633 | return 0; |
cdd3575c AM |
10634 | |
10635 | if (strcmp (".gcc_except_table", sec->name) == 0) | |
9e66c942 | 10636 | return 0; |
cdd3575c | 10637 | |
9e66c942 | 10638 | return COMPLAIN | PRETEND; |
cdd3575c AM |
10639 | } |
10640 | ||
3d7f7666 L |
10641 | /* Find a match between a section and a member of a section group. */ |
10642 | ||
10643 | static asection * | |
c0f00686 L |
10644 | match_group_member (asection *sec, asection *group, |
10645 | struct bfd_link_info *info) | |
3d7f7666 L |
10646 | { |
10647 | asection *first = elf_next_in_group (group); | |
10648 | asection *s = first; | |
10649 | ||
10650 | while (s != NULL) | |
10651 | { | |
c0f00686 | 10652 | if (bfd_elf_match_symbols_in_sections (s, sec, info)) |
3d7f7666 L |
10653 | return s; |
10654 | ||
83180ade | 10655 | s = elf_next_in_group (s); |
3d7f7666 L |
10656 | if (s == first) |
10657 | break; | |
10658 | } | |
10659 | ||
10660 | return NULL; | |
10661 | } | |
10662 | ||
01b3c8ab | 10663 | /* Check if the kept section of a discarded section SEC can be used |
c2370991 AM |
10664 | to replace it. Return the replacement if it is OK. Otherwise return |
10665 | NULL. */ | |
01b3c8ab L |
10666 | |
10667 | asection * | |
c0f00686 | 10668 | _bfd_elf_check_kept_section (asection *sec, struct bfd_link_info *info) |
01b3c8ab L |
10669 | { |
10670 | asection *kept; | |
10671 | ||
10672 | kept = sec->kept_section; | |
10673 | if (kept != NULL) | |
10674 | { | |
c2370991 | 10675 | if ((kept->flags & SEC_GROUP) != 0) |
c0f00686 | 10676 | kept = match_group_member (sec, kept, info); |
1dd2625f BW |
10677 | if (kept != NULL |
10678 | && ((sec->rawsize != 0 ? sec->rawsize : sec->size) | |
10679 | != (kept->rawsize != 0 ? kept->rawsize : kept->size))) | |
01b3c8ab | 10680 | kept = NULL; |
c2370991 | 10681 | sec->kept_section = kept; |
01b3c8ab L |
10682 | } |
10683 | return kept; | |
10684 | } | |
10685 | ||
c152c796 AM |
10686 | /* Link an input file into the linker output file. This function |
10687 | handles all the sections and relocations of the input file at once. | |
10688 | This is so that we only have to read the local symbols once, and | |
10689 | don't have to keep them in memory. */ | |
10690 | ||
10691 | static bfd_boolean | |
8b127cbc | 10692 | elf_link_input_bfd (struct elf_final_link_info *flinfo, bfd *input_bfd) |
c152c796 | 10693 | { |
ece5ef60 | 10694 | int (*relocate_section) |
c152c796 AM |
10695 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
10696 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); | |
10697 | bfd *output_bfd; | |
10698 | Elf_Internal_Shdr *symtab_hdr; | |
10699 | size_t locsymcount; | |
10700 | size_t extsymoff; | |
10701 | Elf_Internal_Sym *isymbuf; | |
10702 | Elf_Internal_Sym *isym; | |
10703 | Elf_Internal_Sym *isymend; | |
10704 | long *pindex; | |
10705 | asection **ppsection; | |
10706 | asection *o; | |
10707 | const struct elf_backend_data *bed; | |
c152c796 | 10708 | struct elf_link_hash_entry **sym_hashes; |
310fd250 L |
10709 | bfd_size_type address_size; |
10710 | bfd_vma r_type_mask; | |
10711 | int r_sym_shift; | |
ffbc01cc | 10712 | bfd_boolean have_file_sym = FALSE; |
c152c796 | 10713 | |
8b127cbc | 10714 | output_bfd = flinfo->output_bfd; |
c152c796 AM |
10715 | bed = get_elf_backend_data (output_bfd); |
10716 | relocate_section = bed->elf_backend_relocate_section; | |
10717 | ||
10718 | /* If this is a dynamic object, we don't want to do anything here: | |
10719 | we don't want the local symbols, and we don't want the section | |
10720 | contents. */ | |
10721 | if ((input_bfd->flags & DYNAMIC) != 0) | |
10722 | return TRUE; | |
10723 | ||
c152c796 AM |
10724 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
10725 | if (elf_bad_symtab (input_bfd)) | |
10726 | { | |
10727 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
10728 | extsymoff = 0; | |
10729 | } | |
10730 | else | |
10731 | { | |
10732 | locsymcount = symtab_hdr->sh_info; | |
10733 | extsymoff = symtab_hdr->sh_info; | |
10734 | } | |
10735 | ||
10736 | /* Read the local symbols. */ | |
10737 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
10738 | if (isymbuf == NULL && locsymcount != 0) | |
10739 | { | |
10740 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
8b127cbc AM |
10741 | flinfo->internal_syms, |
10742 | flinfo->external_syms, | |
10743 | flinfo->locsym_shndx); | |
c152c796 AM |
10744 | if (isymbuf == NULL) |
10745 | return FALSE; | |
10746 | } | |
10747 | ||
10748 | /* Find local symbol sections and adjust values of symbols in | |
10749 | SEC_MERGE sections. Write out those local symbols we know are | |
10750 | going into the output file. */ | |
10751 | isymend = isymbuf + locsymcount; | |
8b127cbc | 10752 | for (isym = isymbuf, pindex = flinfo->indices, ppsection = flinfo->sections; |
c152c796 AM |
10753 | isym < isymend; |
10754 | isym++, pindex++, ppsection++) | |
10755 | { | |
10756 | asection *isec; | |
10757 | const char *name; | |
10758 | Elf_Internal_Sym osym; | |
6e0b88f1 AM |
10759 | long indx; |
10760 | int ret; | |
c152c796 AM |
10761 | |
10762 | *pindex = -1; | |
10763 | ||
10764 | if (elf_bad_symtab (input_bfd)) | |
10765 | { | |
10766 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
10767 | { | |
10768 | *ppsection = NULL; | |
10769 | continue; | |
10770 | } | |
10771 | } | |
10772 | ||
10773 | if (isym->st_shndx == SHN_UNDEF) | |
10774 | isec = bfd_und_section_ptr; | |
c152c796 AM |
10775 | else if (isym->st_shndx == SHN_ABS) |
10776 | isec = bfd_abs_section_ptr; | |
10777 | else if (isym->st_shndx == SHN_COMMON) | |
10778 | isec = bfd_com_section_ptr; | |
10779 | else | |
10780 | { | |
cb33740c AM |
10781 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
10782 | if (isec == NULL) | |
10783 | { | |
10784 | /* Don't attempt to output symbols with st_shnx in the | |
10785 | reserved range other than SHN_ABS and SHN_COMMON. */ | |
6835821b | 10786 | isec = bfd_und_section_ptr; |
cb33740c | 10787 | } |
dbaa2011 | 10788 | else if (isec->sec_info_type == SEC_INFO_TYPE_MERGE |
cb33740c AM |
10789 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
10790 | isym->st_value = | |
10791 | _bfd_merged_section_offset (output_bfd, &isec, | |
10792 | elf_section_data (isec)->sec_info, | |
10793 | isym->st_value); | |
c152c796 AM |
10794 | } |
10795 | ||
10796 | *ppsection = isec; | |
10797 | ||
d983c8c5 AM |
10798 | /* Don't output the first, undefined, symbol. In fact, don't |
10799 | output any undefined local symbol. */ | |
10800 | if (isec == bfd_und_section_ptr) | |
c152c796 AM |
10801 | continue; |
10802 | ||
10803 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
10804 | { | |
10805 | /* We never output section symbols. Instead, we use the | |
10806 | section symbol of the corresponding section in the output | |
10807 | file. */ | |
10808 | continue; | |
10809 | } | |
10810 | ||
10811 | /* If we are stripping all symbols, we don't want to output this | |
10812 | one. */ | |
8b127cbc | 10813 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
10814 | continue; |
10815 | ||
10816 | /* If we are discarding all local symbols, we don't want to | |
10817 | output this one. If we are generating a relocatable output | |
10818 | file, then some of the local symbols may be required by | |
10819 | relocs; we output them below as we discover that they are | |
10820 | needed. */ | |
8b127cbc | 10821 | if (flinfo->info->discard == discard_all) |
c152c796 AM |
10822 | continue; |
10823 | ||
10824 | /* If this symbol is defined in a section which we are | |
f02571c5 | 10825 | discarding, we don't need to keep it. */ |
abf874aa CL |
10826 | if (isym->st_shndx != SHN_UNDEF |
10827 | && isym->st_shndx < SHN_LORESERVE | |
10828 | && isec->output_section == NULL | |
10829 | && flinfo->info->non_contiguous_regions | |
10830 | && flinfo->info->non_contiguous_regions_warnings) | |
10831 | { | |
10832 | _bfd_error_handler (_("warning: --enable-non-contiguous-regions " | |
10833 | "discards section `%s' from '%s'\n"), | |
765cf5f6 | 10834 | isec->name, bfd_get_filename (isec->owner)); |
abf874aa CL |
10835 | continue; |
10836 | } | |
10837 | ||
f02571c5 | 10838 | if (isym->st_shndx != SHN_UNDEF |
4fbb74a6 AM |
10839 | && isym->st_shndx < SHN_LORESERVE |
10840 | && bfd_section_removed_from_list (output_bfd, | |
10841 | isec->output_section)) | |
e75a280b L |
10842 | continue; |
10843 | ||
c152c796 AM |
10844 | /* Get the name of the symbol. */ |
10845 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
10846 | isym->st_name); | |
10847 | if (name == NULL) | |
10848 | return FALSE; | |
10849 | ||
10850 | /* See if we are discarding symbols with this name. */ | |
8b127cbc AM |
10851 | if ((flinfo->info->strip == strip_some |
10852 | && (bfd_hash_lookup (flinfo->info->keep_hash, name, FALSE, FALSE) | |
c152c796 | 10853 | == NULL)) |
8b127cbc | 10854 | || (((flinfo->info->discard == discard_sec_merge |
0e1862bb L |
10855 | && (isec->flags & SEC_MERGE) |
10856 | && !bfd_link_relocatable (flinfo->info)) | |
8b127cbc | 10857 | || flinfo->info->discard == discard_l) |
c152c796 AM |
10858 | && bfd_is_local_label_name (input_bfd, name))) |
10859 | continue; | |
10860 | ||
ffbc01cc AM |
10861 | if (ELF_ST_TYPE (isym->st_info) == STT_FILE) |
10862 | { | |
ce875075 AM |
10863 | if (input_bfd->lto_output) |
10864 | /* -flto puts a temp file name here. This means builds | |
10865 | are not reproducible. Discard the symbol. */ | |
10866 | continue; | |
ffbc01cc AM |
10867 | have_file_sym = TRUE; |
10868 | flinfo->filesym_count += 1; | |
10869 | } | |
10870 | if (!have_file_sym) | |
10871 | { | |
10872 | /* In the absence of debug info, bfd_find_nearest_line uses | |
10873 | FILE symbols to determine the source file for local | |
10874 | function symbols. Provide a FILE symbol here if input | |
10875 | files lack such, so that their symbols won't be | |
10876 | associated with a previous input file. It's not the | |
10877 | source file, but the best we can do. */ | |
10878 | have_file_sym = TRUE; | |
10879 | flinfo->filesym_count += 1; | |
10880 | memset (&osym, 0, sizeof (osym)); | |
10881 | osym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
10882 | osym.st_shndx = SHN_ABS; | |
ef10c3ac L |
10883 | if (!elf_link_output_symstrtab (flinfo, |
10884 | (input_bfd->lto_output ? NULL | |
765cf5f6 | 10885 | : bfd_get_filename (input_bfd)), |
ef10c3ac L |
10886 | &osym, bfd_abs_section_ptr, |
10887 | NULL)) | |
ffbc01cc AM |
10888 | return FALSE; |
10889 | } | |
10890 | ||
c152c796 AM |
10891 | osym = *isym; |
10892 | ||
10893 | /* Adjust the section index for the output file. */ | |
10894 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
10895 | isec->output_section); | |
10896 | if (osym.st_shndx == SHN_BAD) | |
10897 | return FALSE; | |
10898 | ||
c152c796 AM |
10899 | /* ELF symbols in relocatable files are section relative, but |
10900 | in executable files they are virtual addresses. Note that | |
10901 | this code assumes that all ELF sections have an associated | |
10902 | BFD section with a reasonable value for output_offset; below | |
10903 | we assume that they also have a reasonable value for | |
10904 | output_section. Any special sections must be set up to meet | |
10905 | these requirements. */ | |
10906 | osym.st_value += isec->output_offset; | |
0e1862bb | 10907 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10908 | { |
10909 | osym.st_value += isec->output_section->vma; | |
10910 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
10911 | { | |
10912 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
102def4d AM |
10913 | if (elf_hash_table (flinfo->info)->tls_sec != NULL) |
10914 | osym.st_value -= elf_hash_table (flinfo->info)->tls_sec->vma; | |
10915 | else | |
10916 | osym.st_info = ELF_ST_INFO (ELF_ST_BIND (osym.st_info), | |
10917 | STT_NOTYPE); | |
c152c796 AM |
10918 | } |
10919 | } | |
10920 | ||
6e0b88f1 | 10921 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac | 10922 | ret = elf_link_output_symstrtab (flinfo, name, &osym, isec, NULL); |
6e0b88f1 | 10923 | if (ret == 0) |
c152c796 | 10924 | return FALSE; |
6e0b88f1 AM |
10925 | else if (ret == 1) |
10926 | *pindex = indx; | |
c152c796 AM |
10927 | } |
10928 | ||
310fd250 L |
10929 | if (bed->s->arch_size == 32) |
10930 | { | |
10931 | r_type_mask = 0xff; | |
10932 | r_sym_shift = 8; | |
10933 | address_size = 4; | |
10934 | } | |
10935 | else | |
10936 | { | |
10937 | r_type_mask = 0xffffffff; | |
10938 | r_sym_shift = 32; | |
10939 | address_size = 8; | |
10940 | } | |
10941 | ||
c152c796 AM |
10942 | /* Relocate the contents of each section. */ |
10943 | sym_hashes = elf_sym_hashes (input_bfd); | |
10944 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
10945 | { | |
10946 | bfd_byte *contents; | |
10947 | ||
10948 | if (! o->linker_mark) | |
10949 | { | |
10950 | /* This section was omitted from the link. */ | |
10951 | continue; | |
10952 | } | |
10953 | ||
7bdf4127 | 10954 | if (!flinfo->info->resolve_section_groups |
bcacc0f5 AM |
10955 | && (o->flags & (SEC_LINKER_CREATED | SEC_GROUP)) == SEC_GROUP) |
10956 | { | |
10957 | /* Deal with the group signature symbol. */ | |
10958 | struct bfd_elf_section_data *sec_data = elf_section_data (o); | |
10959 | unsigned long symndx = sec_data->this_hdr.sh_info; | |
10960 | asection *osec = o->output_section; | |
10961 | ||
7bdf4127 | 10962 | BFD_ASSERT (bfd_link_relocatable (flinfo->info)); |
bcacc0f5 AM |
10963 | if (symndx >= locsymcount |
10964 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 10965 | && flinfo->sections[symndx] == NULL)) |
bcacc0f5 AM |
10966 | { |
10967 | struct elf_link_hash_entry *h = sym_hashes[symndx - extsymoff]; | |
10968 | while (h->root.type == bfd_link_hash_indirect | |
10969 | || h->root.type == bfd_link_hash_warning) | |
10970 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10971 | /* Arrange for symbol to be output. */ | |
10972 | h->indx = -2; | |
10973 | elf_section_data (osec)->this_hdr.sh_info = -2; | |
10974 | } | |
10975 | else if (ELF_ST_TYPE (isymbuf[symndx].st_info) == STT_SECTION) | |
10976 | { | |
10977 | /* We'll use the output section target_index. */ | |
8b127cbc | 10978 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 AM |
10979 | elf_section_data (osec)->this_hdr.sh_info = sec->target_index; |
10980 | } | |
10981 | else | |
10982 | { | |
8b127cbc | 10983 | if (flinfo->indices[symndx] == -1) |
bcacc0f5 AM |
10984 | { |
10985 | /* Otherwise output the local symbol now. */ | |
10986 | Elf_Internal_Sym sym = isymbuf[symndx]; | |
8b127cbc | 10987 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 | 10988 | const char *name; |
6e0b88f1 AM |
10989 | long indx; |
10990 | int ret; | |
bcacc0f5 AM |
10991 | |
10992 | name = bfd_elf_string_from_elf_section (input_bfd, | |
10993 | symtab_hdr->sh_link, | |
10994 | sym.st_name); | |
10995 | if (name == NULL) | |
10996 | return FALSE; | |
10997 | ||
10998 | sym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
10999 | sec); | |
11000 | if (sym.st_shndx == SHN_BAD) | |
11001 | return FALSE; | |
11002 | ||
11003 | sym.st_value += o->output_offset; | |
11004 | ||
6e0b88f1 | 11005 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
11006 | ret = elf_link_output_symstrtab (flinfo, name, &sym, o, |
11007 | NULL); | |
6e0b88f1 | 11008 | if (ret == 0) |
bcacc0f5 | 11009 | return FALSE; |
6e0b88f1 | 11010 | else if (ret == 1) |
8b127cbc | 11011 | flinfo->indices[symndx] = indx; |
6e0b88f1 AM |
11012 | else |
11013 | abort (); | |
bcacc0f5 AM |
11014 | } |
11015 | elf_section_data (osec)->this_hdr.sh_info | |
8b127cbc | 11016 | = flinfo->indices[symndx]; |
bcacc0f5 AM |
11017 | } |
11018 | } | |
11019 | ||
c152c796 | 11020 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
eea6121a | 11021 | || (o->size == 0 && (o->flags & SEC_RELOC) == 0)) |
c152c796 AM |
11022 | continue; |
11023 | ||
11024 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
11025 | { | |
11026 | /* Section was created by _bfd_elf_link_create_dynamic_sections | |
11027 | or somesuch. */ | |
11028 | continue; | |
11029 | } | |
11030 | ||
11031 | /* Get the contents of the section. They have been cached by a | |
11032 | relaxation routine. Note that o is a section in an input | |
11033 | file, so the contents field will not have been set by any of | |
11034 | the routines which work on output files. */ | |
11035 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
53291d1f AM |
11036 | { |
11037 | contents = elf_section_data (o)->this_hdr.contents; | |
11038 | if (bed->caches_rawsize | |
11039 | && o->rawsize != 0 | |
11040 | && o->rawsize < o->size) | |
11041 | { | |
11042 | memcpy (flinfo->contents, contents, o->rawsize); | |
11043 | contents = flinfo->contents; | |
11044 | } | |
11045 | } | |
c152c796 AM |
11046 | else |
11047 | { | |
8b127cbc | 11048 | contents = flinfo->contents; |
4a114e3e | 11049 | if (! bfd_get_full_section_contents (input_bfd, o, &contents)) |
c152c796 AM |
11050 | return FALSE; |
11051 | } | |
11052 | ||
11053 | if ((o->flags & SEC_RELOC) != 0) | |
11054 | { | |
11055 | Elf_Internal_Rela *internal_relocs; | |
0f02bbd9 | 11056 | Elf_Internal_Rela *rel, *relend; |
0f02bbd9 | 11057 | int action_discarded; |
ece5ef60 | 11058 | int ret; |
c152c796 AM |
11059 | |
11060 | /* Get the swapped relocs. */ | |
11061 | internal_relocs | |
8b127cbc AM |
11062 | = _bfd_elf_link_read_relocs (input_bfd, o, flinfo->external_relocs, |
11063 | flinfo->internal_relocs, FALSE); | |
c152c796 AM |
11064 | if (internal_relocs == NULL |
11065 | && o->reloc_count > 0) | |
11066 | return FALSE; | |
11067 | ||
310fd250 L |
11068 | /* We need to reverse-copy input .ctors/.dtors sections if |
11069 | they are placed in .init_array/.finit_array for output. */ | |
11070 | if (o->size > address_size | |
11071 | && ((strncmp (o->name, ".ctors", 6) == 0 | |
11072 | && strcmp (o->output_section->name, | |
11073 | ".init_array") == 0) | |
11074 | || (strncmp (o->name, ".dtors", 6) == 0 | |
11075 | && strcmp (o->output_section->name, | |
11076 | ".fini_array") == 0)) | |
11077 | && (o->name[6] == 0 || o->name[6] == '.')) | |
c152c796 | 11078 | { |
056bafd4 MR |
11079 | if (o->size * bed->s->int_rels_per_ext_rel |
11080 | != o->reloc_count * address_size) | |
310fd250 | 11081 | { |
4eca0228 | 11082 | _bfd_error_handler |
695344c0 | 11083 | /* xgettext:c-format */ |
871b3ab2 | 11084 | (_("error: %pB: size of section %pA is not " |
310fd250 L |
11085 | "multiple of address size"), |
11086 | input_bfd, o); | |
8c6716e5 | 11087 | bfd_set_error (bfd_error_bad_value); |
310fd250 L |
11088 | return FALSE; |
11089 | } | |
11090 | o->flags |= SEC_ELF_REVERSE_COPY; | |
c152c796 AM |
11091 | } |
11092 | ||
0f02bbd9 | 11093 | action_discarded = -1; |
c152c796 | 11094 | if (!elf_section_ignore_discarded_relocs (o)) |
0f02bbd9 AM |
11095 | action_discarded = (*bed->action_discarded) (o); |
11096 | ||
11097 | /* Run through the relocs evaluating complex reloc symbols and | |
11098 | looking for relocs against symbols from discarded sections | |
11099 | or section symbols from removed link-once sections. | |
11100 | Complain about relocs against discarded sections. Zero | |
11101 | relocs against removed link-once sections. */ | |
11102 | ||
11103 | rel = internal_relocs; | |
056bafd4 | 11104 | relend = rel + o->reloc_count; |
0f02bbd9 | 11105 | for ( ; rel < relend; rel++) |
c152c796 | 11106 | { |
0f02bbd9 AM |
11107 | unsigned long r_symndx = rel->r_info >> r_sym_shift; |
11108 | unsigned int s_type; | |
11109 | asection **ps, *sec; | |
11110 | struct elf_link_hash_entry *h = NULL; | |
11111 | const char *sym_name; | |
c152c796 | 11112 | |
0f02bbd9 AM |
11113 | if (r_symndx == STN_UNDEF) |
11114 | continue; | |
c152c796 | 11115 | |
0f02bbd9 AM |
11116 | if (r_symndx >= locsymcount |
11117 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 11118 | && flinfo->sections[r_symndx] == NULL)) |
0f02bbd9 AM |
11119 | { |
11120 | h = sym_hashes[r_symndx - extsymoff]; | |
ee75fd95 | 11121 | |
0f02bbd9 AM |
11122 | /* Badly formatted input files can contain relocs that |
11123 | reference non-existant symbols. Check here so that | |
11124 | we do not seg fault. */ | |
11125 | if (h == NULL) | |
c152c796 | 11126 | { |
4eca0228 | 11127 | _bfd_error_handler |
695344c0 | 11128 | /* xgettext:c-format */ |
2dcf00ce | 11129 | (_("error: %pB contains a reloc (%#" PRIx64 ") for section %pA " |
0f02bbd9 | 11130 | "that references a non-existent global symbol"), |
2dcf00ce | 11131 | input_bfd, (uint64_t) rel->r_info, o); |
0f02bbd9 AM |
11132 | bfd_set_error (bfd_error_bad_value); |
11133 | return FALSE; | |
11134 | } | |
3b36f7e6 | 11135 | |
0f02bbd9 AM |
11136 | while (h->root.type == bfd_link_hash_indirect |
11137 | || h->root.type == bfd_link_hash_warning) | |
11138 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c152c796 | 11139 | |
0f02bbd9 | 11140 | s_type = h->type; |
cdd3575c | 11141 | |
9e2dec47 | 11142 | /* If a plugin symbol is referenced from a non-IR file, |
ca4be51c AM |
11143 | mark the symbol as undefined. Note that the |
11144 | linker may attach linker created dynamic sections | |
11145 | to the plugin bfd. Symbols defined in linker | |
11146 | created sections are not plugin symbols. */ | |
bc4e12de | 11147 | if ((h->root.non_ir_ref_regular |
4070765b | 11148 | || h->root.non_ir_ref_dynamic) |
9e2dec47 L |
11149 | && (h->root.type == bfd_link_hash_defined |
11150 | || h->root.type == bfd_link_hash_defweak) | |
11151 | && (h->root.u.def.section->flags | |
11152 | & SEC_LINKER_CREATED) == 0 | |
11153 | && h->root.u.def.section->owner != NULL | |
11154 | && (h->root.u.def.section->owner->flags | |
11155 | & BFD_PLUGIN) != 0) | |
11156 | { | |
11157 | h->root.type = bfd_link_hash_undefined; | |
11158 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
11159 | } | |
11160 | ||
0f02bbd9 AM |
11161 | ps = NULL; |
11162 | if (h->root.type == bfd_link_hash_defined | |
11163 | || h->root.type == bfd_link_hash_defweak) | |
11164 | ps = &h->root.u.def.section; | |
11165 | ||
11166 | sym_name = h->root.root.string; | |
11167 | } | |
11168 | else | |
11169 | { | |
11170 | Elf_Internal_Sym *sym = isymbuf + r_symndx; | |
11171 | ||
11172 | s_type = ELF_ST_TYPE (sym->st_info); | |
8b127cbc | 11173 | ps = &flinfo->sections[r_symndx]; |
0f02bbd9 AM |
11174 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, |
11175 | sym, *ps); | |
11176 | } | |
c152c796 | 11177 | |
c301e700 | 11178 | if ((s_type == STT_RELC || s_type == STT_SRELC) |
0e1862bb | 11179 | && !bfd_link_relocatable (flinfo->info)) |
0f02bbd9 AM |
11180 | { |
11181 | bfd_vma val; | |
11182 | bfd_vma dot = (rel->r_offset | |
11183 | + o->output_offset + o->output_section->vma); | |
11184 | #ifdef DEBUG | |
11185 | printf ("Encountered a complex symbol!"); | |
11186 | printf (" (input_bfd %s, section %s, reloc %ld\n", | |
765cf5f6 | 11187 | bfd_get_filename (input_bfd), o->name, |
9ccb8af9 | 11188 | (long) (rel - internal_relocs)); |
0f02bbd9 AM |
11189 | printf (" symbol: idx %8.8lx, name %s\n", |
11190 | r_symndx, sym_name); | |
11191 | printf (" reloc : info %8.8lx, addr %8.8lx\n", | |
11192 | (unsigned long) rel->r_info, | |
11193 | (unsigned long) rel->r_offset); | |
11194 | #endif | |
8b127cbc | 11195 | if (!eval_symbol (&val, &sym_name, input_bfd, flinfo, dot, |
0f02bbd9 AM |
11196 | isymbuf, locsymcount, s_type == STT_SRELC)) |
11197 | return FALSE; | |
11198 | ||
11199 | /* Symbol evaluated OK. Update to absolute value. */ | |
11200 | set_symbol_value (input_bfd, isymbuf, locsymcount, | |
11201 | r_symndx, val); | |
11202 | continue; | |
11203 | } | |
11204 | ||
11205 | if (action_discarded != -1 && ps != NULL) | |
11206 | { | |
cdd3575c AM |
11207 | /* Complain if the definition comes from a |
11208 | discarded section. */ | |
dbaa2011 | 11209 | if ((sec = *ps) != NULL && discarded_section (sec)) |
cdd3575c | 11210 | { |
cf35638d | 11211 | BFD_ASSERT (r_symndx != STN_UNDEF); |
0f02bbd9 | 11212 | if (action_discarded & COMPLAIN) |
8b127cbc | 11213 | (*flinfo->info->callbacks->einfo) |
695344c0 | 11214 | /* xgettext:c-format */ |
871b3ab2 AM |
11215 | (_("%X`%s' referenced in section `%pA' of %pB: " |
11216 | "defined in discarded section `%pA' of %pB\n"), | |
e1fffbe6 | 11217 | sym_name, o, input_bfd, sec, sec->owner); |
cdd3575c | 11218 | |
87e5235d | 11219 | /* Try to do the best we can to support buggy old |
e0ae6d6f | 11220 | versions of gcc. Pretend that the symbol is |
87e5235d AM |
11221 | really defined in the kept linkonce section. |
11222 | FIXME: This is quite broken. Modifying the | |
11223 | symbol here means we will be changing all later | |
e0ae6d6f | 11224 | uses of the symbol, not just in this section. */ |
0f02bbd9 | 11225 | if (action_discarded & PRETEND) |
87e5235d | 11226 | { |
01b3c8ab L |
11227 | asection *kept; |
11228 | ||
c0f00686 | 11229 | kept = _bfd_elf_check_kept_section (sec, |
8b127cbc | 11230 | flinfo->info); |
01b3c8ab | 11231 | if (kept != NULL) |
87e5235d AM |
11232 | { |
11233 | *ps = kept; | |
11234 | continue; | |
11235 | } | |
11236 | } | |
c152c796 AM |
11237 | } |
11238 | } | |
11239 | } | |
11240 | ||
11241 | /* Relocate the section by invoking a back end routine. | |
11242 | ||
11243 | The back end routine is responsible for adjusting the | |
11244 | section contents as necessary, and (if using Rela relocs | |
11245 | and generating a relocatable output file) adjusting the | |
11246 | reloc addend as necessary. | |
11247 | ||
11248 | The back end routine does not have to worry about setting | |
11249 | the reloc address or the reloc symbol index. | |
11250 | ||
11251 | The back end routine is given a pointer to the swapped in | |
11252 | internal symbols, and can access the hash table entries | |
11253 | for the external symbols via elf_sym_hashes (input_bfd). | |
11254 | ||
11255 | When generating relocatable output, the back end routine | |
11256 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
11257 | output symbol is going to be a section symbol | |
11258 | corresponding to the output section, which will require | |
11259 | the addend to be adjusted. */ | |
11260 | ||
8b127cbc | 11261 | ret = (*relocate_section) (output_bfd, flinfo->info, |
c152c796 AM |
11262 | input_bfd, o, contents, |
11263 | internal_relocs, | |
11264 | isymbuf, | |
8b127cbc | 11265 | flinfo->sections); |
ece5ef60 | 11266 | if (!ret) |
c152c796 AM |
11267 | return FALSE; |
11268 | ||
ece5ef60 | 11269 | if (ret == 2 |
0e1862bb | 11270 | || bfd_link_relocatable (flinfo->info) |
8b127cbc | 11271 | || flinfo->info->emitrelocations) |
c152c796 AM |
11272 | { |
11273 | Elf_Internal_Rela *irela; | |
d4730f92 | 11274 | Elf_Internal_Rela *irelaend, *irelamid; |
c152c796 AM |
11275 | bfd_vma last_offset; |
11276 | struct elf_link_hash_entry **rel_hash; | |
d4730f92 BS |
11277 | struct elf_link_hash_entry **rel_hash_list, **rela_hash_list; |
11278 | Elf_Internal_Shdr *input_rel_hdr, *input_rela_hdr; | |
c152c796 | 11279 | unsigned int next_erel; |
c152c796 | 11280 | bfd_boolean rela_normal; |
d4730f92 | 11281 | struct bfd_elf_section_data *esdi, *esdo; |
c152c796 | 11282 | |
d4730f92 BS |
11283 | esdi = elf_section_data (o); |
11284 | esdo = elf_section_data (o->output_section); | |
11285 | rela_normal = FALSE; | |
c152c796 AM |
11286 | |
11287 | /* Adjust the reloc addresses and symbol indices. */ | |
11288 | ||
11289 | irela = internal_relocs; | |
056bafd4 | 11290 | irelaend = irela + o->reloc_count; |
d4730f92 BS |
11291 | rel_hash = esdo->rel.hashes + esdo->rel.count; |
11292 | /* We start processing the REL relocs, if any. When we reach | |
11293 | IRELAMID in the loop, we switch to the RELA relocs. */ | |
11294 | irelamid = irela; | |
11295 | if (esdi->rel.hdr != NULL) | |
11296 | irelamid += (NUM_SHDR_ENTRIES (esdi->rel.hdr) | |
11297 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 11298 | rel_hash_list = rel_hash; |
d4730f92 | 11299 | rela_hash_list = NULL; |
c152c796 | 11300 | last_offset = o->output_offset; |
0e1862bb | 11301 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
11302 | last_offset += o->output_section->vma; |
11303 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) | |
11304 | { | |
11305 | unsigned long r_symndx; | |
11306 | asection *sec; | |
11307 | Elf_Internal_Sym sym; | |
11308 | ||
11309 | if (next_erel == bed->s->int_rels_per_ext_rel) | |
11310 | { | |
11311 | rel_hash++; | |
11312 | next_erel = 0; | |
11313 | } | |
11314 | ||
d4730f92 BS |
11315 | if (irela == irelamid) |
11316 | { | |
11317 | rel_hash = esdo->rela.hashes + esdo->rela.count; | |
11318 | rela_hash_list = rel_hash; | |
11319 | rela_normal = bed->rela_normal; | |
11320 | } | |
11321 | ||
c152c796 | 11322 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
8b127cbc | 11323 | flinfo->info, o, |
c152c796 AM |
11324 | irela->r_offset); |
11325 | if (irela->r_offset >= (bfd_vma) -2) | |
11326 | { | |
11327 | /* This is a reloc for a deleted entry or somesuch. | |
11328 | Turn it into an R_*_NONE reloc, at the same | |
11329 | offset as the last reloc. elf_eh_frame.c and | |
e460dd0d | 11330 | bfd_elf_discard_info rely on reloc offsets |
c152c796 AM |
11331 | being ordered. */ |
11332 | irela->r_offset = last_offset; | |
11333 | irela->r_info = 0; | |
11334 | irela->r_addend = 0; | |
11335 | continue; | |
11336 | } | |
11337 | ||
11338 | irela->r_offset += o->output_offset; | |
11339 | ||
11340 | /* Relocs in an executable have to be virtual addresses. */ | |
0e1862bb | 11341 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
11342 | irela->r_offset += o->output_section->vma; |
11343 | ||
11344 | last_offset = irela->r_offset; | |
11345 | ||
11346 | r_symndx = irela->r_info >> r_sym_shift; | |
11347 | if (r_symndx == STN_UNDEF) | |
11348 | continue; | |
11349 | ||
11350 | if (r_symndx >= locsymcount | |
11351 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 11352 | && flinfo->sections[r_symndx] == NULL)) |
c152c796 AM |
11353 | { |
11354 | struct elf_link_hash_entry *rh; | |
11355 | unsigned long indx; | |
11356 | ||
11357 | /* This is a reloc against a global symbol. We | |
11358 | have not yet output all the local symbols, so | |
11359 | we do not know the symbol index of any global | |
11360 | symbol. We set the rel_hash entry for this | |
11361 | reloc to point to the global hash table entry | |
11362 | for this symbol. The symbol index is then | |
ee75fd95 | 11363 | set at the end of bfd_elf_final_link. */ |
c152c796 AM |
11364 | indx = r_symndx - extsymoff; |
11365 | rh = elf_sym_hashes (input_bfd)[indx]; | |
11366 | while (rh->root.type == bfd_link_hash_indirect | |
11367 | || rh->root.type == bfd_link_hash_warning) | |
11368 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
11369 | ||
11370 | /* Setting the index to -2 tells | |
11371 | elf_link_output_extsym that this symbol is | |
11372 | used by a reloc. */ | |
11373 | BFD_ASSERT (rh->indx < 0); | |
11374 | rh->indx = -2; | |
c152c796 AM |
11375 | *rel_hash = rh; |
11376 | ||
11377 | continue; | |
11378 | } | |
11379 | ||
11380 | /* This is a reloc against a local symbol. */ | |
11381 | ||
11382 | *rel_hash = NULL; | |
11383 | sym = isymbuf[r_symndx]; | |
8b127cbc | 11384 | sec = flinfo->sections[r_symndx]; |
c152c796 AM |
11385 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
11386 | { | |
11387 | /* I suppose the backend ought to fill in the | |
11388 | section of any STT_SECTION symbol against a | |
6a8d1586 | 11389 | processor specific section. */ |
cf35638d | 11390 | r_symndx = STN_UNDEF; |
6a8d1586 AM |
11391 | if (bfd_is_abs_section (sec)) |
11392 | ; | |
c152c796 AM |
11393 | else if (sec == NULL || sec->owner == NULL) |
11394 | { | |
11395 | bfd_set_error (bfd_error_bad_value); | |
11396 | return FALSE; | |
11397 | } | |
11398 | else | |
11399 | { | |
6a8d1586 AM |
11400 | asection *osec = sec->output_section; |
11401 | ||
11402 | /* If we have discarded a section, the output | |
11403 | section will be the absolute section. In | |
ab96bf03 AM |
11404 | case of discarded SEC_MERGE sections, use |
11405 | the kept section. relocate_section should | |
11406 | have already handled discarded linkonce | |
11407 | sections. */ | |
6a8d1586 AM |
11408 | if (bfd_is_abs_section (osec) |
11409 | && sec->kept_section != NULL | |
11410 | && sec->kept_section->output_section != NULL) | |
11411 | { | |
11412 | osec = sec->kept_section->output_section; | |
11413 | irela->r_addend -= osec->vma; | |
11414 | } | |
11415 | ||
11416 | if (!bfd_is_abs_section (osec)) | |
11417 | { | |
11418 | r_symndx = osec->target_index; | |
cf35638d | 11419 | if (r_symndx == STN_UNDEF) |
74541ad4 | 11420 | { |
051d833a AM |
11421 | irela->r_addend += osec->vma; |
11422 | osec = _bfd_nearby_section (output_bfd, osec, | |
11423 | osec->vma); | |
11424 | irela->r_addend -= osec->vma; | |
11425 | r_symndx = osec->target_index; | |
74541ad4 | 11426 | } |
6a8d1586 | 11427 | } |
c152c796 AM |
11428 | } |
11429 | ||
11430 | /* Adjust the addend according to where the | |
11431 | section winds up in the output section. */ | |
11432 | if (rela_normal) | |
11433 | irela->r_addend += sec->output_offset; | |
11434 | } | |
11435 | else | |
11436 | { | |
8b127cbc | 11437 | if (flinfo->indices[r_symndx] == -1) |
c152c796 AM |
11438 | { |
11439 | unsigned long shlink; | |
11440 | const char *name; | |
11441 | asection *osec; | |
6e0b88f1 | 11442 | long indx; |
c152c796 | 11443 | |
8b127cbc | 11444 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
11445 | { |
11446 | /* You can't do ld -r -s. */ | |
11447 | bfd_set_error (bfd_error_invalid_operation); | |
11448 | return FALSE; | |
11449 | } | |
11450 | ||
11451 | /* This symbol was skipped earlier, but | |
11452 | since it is needed by a reloc, we | |
11453 | must output it now. */ | |
11454 | shlink = symtab_hdr->sh_link; | |
11455 | name = (bfd_elf_string_from_elf_section | |
11456 | (input_bfd, shlink, sym.st_name)); | |
11457 | if (name == NULL) | |
11458 | return FALSE; | |
11459 | ||
11460 | osec = sec->output_section; | |
11461 | sym.st_shndx = | |
11462 | _bfd_elf_section_from_bfd_section (output_bfd, | |
11463 | osec); | |
11464 | if (sym.st_shndx == SHN_BAD) | |
11465 | return FALSE; | |
11466 | ||
11467 | sym.st_value += sec->output_offset; | |
0e1862bb | 11468 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
11469 | { |
11470 | sym.st_value += osec->vma; | |
11471 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
11472 | { | |
102def4d AM |
11473 | struct elf_link_hash_table *htab |
11474 | = elf_hash_table (flinfo->info); | |
11475 | ||
c152c796 AM |
11476 | /* STT_TLS symbols are relative to PT_TLS |
11477 | segment base. */ | |
102def4d AM |
11478 | if (htab->tls_sec != NULL) |
11479 | sym.st_value -= htab->tls_sec->vma; | |
11480 | else | |
11481 | sym.st_info | |
11482 | = ELF_ST_INFO (ELF_ST_BIND (sym.st_info), | |
11483 | STT_NOTYPE); | |
c152c796 AM |
11484 | } |
11485 | } | |
11486 | ||
6e0b88f1 | 11487 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
11488 | ret = elf_link_output_symstrtab (flinfo, name, |
11489 | &sym, sec, | |
11490 | NULL); | |
6e0b88f1 | 11491 | if (ret == 0) |
c152c796 | 11492 | return FALSE; |
6e0b88f1 | 11493 | else if (ret == 1) |
8b127cbc | 11494 | flinfo->indices[r_symndx] = indx; |
6e0b88f1 AM |
11495 | else |
11496 | abort (); | |
c152c796 AM |
11497 | } |
11498 | ||
8b127cbc | 11499 | r_symndx = flinfo->indices[r_symndx]; |
c152c796 AM |
11500 | } |
11501 | ||
11502 | irela->r_info = ((bfd_vma) r_symndx << r_sym_shift | |
11503 | | (irela->r_info & r_type_mask)); | |
11504 | } | |
11505 | ||
11506 | /* Swap out the relocs. */ | |
d4730f92 BS |
11507 | input_rel_hdr = esdi->rel.hdr; |
11508 | if (input_rel_hdr && input_rel_hdr->sh_size != 0) | |
c152c796 | 11509 | { |
d4730f92 BS |
11510 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
11511 | input_rel_hdr, | |
11512 | internal_relocs, | |
11513 | rel_hash_list)) | |
11514 | return FALSE; | |
c152c796 AM |
11515 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) |
11516 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 11517 | rel_hash_list += NUM_SHDR_ENTRIES (input_rel_hdr); |
d4730f92 BS |
11518 | } |
11519 | ||
11520 | input_rela_hdr = esdi->rela.hdr; | |
11521 | if (input_rela_hdr && input_rela_hdr->sh_size != 0) | |
11522 | { | |
eac338cf | 11523 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
d4730f92 | 11524 | input_rela_hdr, |
eac338cf | 11525 | internal_relocs, |
d4730f92 | 11526 | rela_hash_list)) |
c152c796 AM |
11527 | return FALSE; |
11528 | } | |
11529 | } | |
11530 | } | |
11531 | ||
11532 | /* Write out the modified section contents. */ | |
11533 | if (bed->elf_backend_write_section | |
8b127cbc | 11534 | && (*bed->elf_backend_write_section) (output_bfd, flinfo->info, o, |
c7b8f16e | 11535 | contents)) |
c152c796 AM |
11536 | { |
11537 | /* Section written out. */ | |
11538 | } | |
11539 | else switch (o->sec_info_type) | |
11540 | { | |
dbaa2011 | 11541 | case SEC_INFO_TYPE_STABS: |
c152c796 AM |
11542 | if (! (_bfd_write_section_stabs |
11543 | (output_bfd, | |
8b127cbc | 11544 | &elf_hash_table (flinfo->info)->stab_info, |
c152c796 AM |
11545 | o, &elf_section_data (o)->sec_info, contents))) |
11546 | return FALSE; | |
11547 | break; | |
dbaa2011 | 11548 | case SEC_INFO_TYPE_MERGE: |
c152c796 AM |
11549 | if (! _bfd_write_merged_section (output_bfd, o, |
11550 | elf_section_data (o)->sec_info)) | |
11551 | return FALSE; | |
11552 | break; | |
dbaa2011 | 11553 | case SEC_INFO_TYPE_EH_FRAME: |
c152c796 | 11554 | { |
8b127cbc | 11555 | if (! _bfd_elf_write_section_eh_frame (output_bfd, flinfo->info, |
c152c796 AM |
11556 | o, contents)) |
11557 | return FALSE; | |
11558 | } | |
11559 | break; | |
2f0c68f2 CM |
11560 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
11561 | { | |
11562 | if (! _bfd_elf_write_section_eh_frame_entry (output_bfd, | |
11563 | flinfo->info, | |
11564 | o, contents)) | |
11565 | return FALSE; | |
11566 | } | |
11567 | break; | |
c152c796 AM |
11568 | default: |
11569 | { | |
310fd250 L |
11570 | if (! (o->flags & SEC_EXCLUDE)) |
11571 | { | |
11572 | file_ptr offset = (file_ptr) o->output_offset; | |
11573 | bfd_size_type todo = o->size; | |
37b01f6a | 11574 | |
bb294208 | 11575 | offset *= bfd_octets_per_byte (output_bfd, o); |
37b01f6a | 11576 | |
310fd250 L |
11577 | if ((o->flags & SEC_ELF_REVERSE_COPY)) |
11578 | { | |
11579 | /* Reverse-copy input section to output. */ | |
11580 | do | |
11581 | { | |
11582 | todo -= address_size; | |
11583 | if (! bfd_set_section_contents (output_bfd, | |
11584 | o->output_section, | |
11585 | contents + todo, | |
11586 | offset, | |
11587 | address_size)) | |
11588 | return FALSE; | |
11589 | if (todo == 0) | |
11590 | break; | |
11591 | offset += address_size; | |
11592 | } | |
11593 | while (1); | |
11594 | } | |
11595 | else if (! bfd_set_section_contents (output_bfd, | |
11596 | o->output_section, | |
11597 | contents, | |
11598 | offset, todo)) | |
11599 | return FALSE; | |
11600 | } | |
c152c796 AM |
11601 | } |
11602 | break; | |
11603 | } | |
11604 | } | |
11605 | ||
11606 | return TRUE; | |
11607 | } | |
11608 | ||
11609 | /* Generate a reloc when linking an ELF file. This is a reloc | |
3a800eb9 | 11610 | requested by the linker, and does not come from any input file. This |
c152c796 AM |
11611 | is used to build constructor and destructor tables when linking |
11612 | with -Ur. */ | |
11613 | ||
11614 | static bfd_boolean | |
11615 | elf_reloc_link_order (bfd *output_bfd, | |
11616 | struct bfd_link_info *info, | |
11617 | asection *output_section, | |
11618 | struct bfd_link_order *link_order) | |
11619 | { | |
11620 | reloc_howto_type *howto; | |
11621 | long indx; | |
11622 | bfd_vma offset; | |
11623 | bfd_vma addend; | |
d4730f92 | 11624 | struct bfd_elf_section_reloc_data *reldata; |
c152c796 AM |
11625 | struct elf_link_hash_entry **rel_hash_ptr; |
11626 | Elf_Internal_Shdr *rel_hdr; | |
11627 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
11628 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; | |
11629 | bfd_byte *erel; | |
11630 | unsigned int i; | |
d4730f92 | 11631 | struct bfd_elf_section_data *esdo = elf_section_data (output_section); |
c152c796 AM |
11632 | |
11633 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
11634 | if (howto == NULL) | |
11635 | { | |
11636 | bfd_set_error (bfd_error_bad_value); | |
11637 | return FALSE; | |
11638 | } | |
11639 | ||
11640 | addend = link_order->u.reloc.p->addend; | |
11641 | ||
d4730f92 BS |
11642 | if (esdo->rel.hdr) |
11643 | reldata = &esdo->rel; | |
11644 | else if (esdo->rela.hdr) | |
11645 | reldata = &esdo->rela; | |
11646 | else | |
11647 | { | |
11648 | reldata = NULL; | |
11649 | BFD_ASSERT (0); | |
11650 | } | |
11651 | ||
c152c796 | 11652 | /* Figure out the symbol index. */ |
d4730f92 | 11653 | rel_hash_ptr = reldata->hashes + reldata->count; |
c152c796 AM |
11654 | if (link_order->type == bfd_section_reloc_link_order) |
11655 | { | |
11656 | indx = link_order->u.reloc.p->u.section->target_index; | |
11657 | BFD_ASSERT (indx != 0); | |
11658 | *rel_hash_ptr = NULL; | |
11659 | } | |
11660 | else | |
11661 | { | |
11662 | struct elf_link_hash_entry *h; | |
11663 | ||
11664 | /* Treat a reloc against a defined symbol as though it were | |
11665 | actually against the section. */ | |
11666 | h = ((struct elf_link_hash_entry *) | |
11667 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
11668 | link_order->u.reloc.p->u.name, | |
11669 | FALSE, FALSE, TRUE)); | |
11670 | if (h != NULL | |
11671 | && (h->root.type == bfd_link_hash_defined | |
11672 | || h->root.type == bfd_link_hash_defweak)) | |
11673 | { | |
11674 | asection *section; | |
11675 | ||
11676 | section = h->root.u.def.section; | |
11677 | indx = section->output_section->target_index; | |
11678 | *rel_hash_ptr = NULL; | |
11679 | /* It seems that we ought to add the symbol value to the | |
11680 | addend here, but in practice it has already been added | |
11681 | because it was passed to constructor_callback. */ | |
11682 | addend += section->output_section->vma + section->output_offset; | |
11683 | } | |
11684 | else if (h != NULL) | |
11685 | { | |
11686 | /* Setting the index to -2 tells elf_link_output_extsym that | |
11687 | this symbol is used by a reloc. */ | |
11688 | h->indx = -2; | |
11689 | *rel_hash_ptr = h; | |
11690 | indx = 0; | |
11691 | } | |
11692 | else | |
11693 | { | |
1a72702b AM |
11694 | (*info->callbacks->unattached_reloc) |
11695 | (info, link_order->u.reloc.p->u.name, NULL, NULL, 0); | |
c152c796 AM |
11696 | indx = 0; |
11697 | } | |
11698 | } | |
11699 | ||
11700 | /* If this is an inplace reloc, we must write the addend into the | |
11701 | object file. */ | |
11702 | if (howto->partial_inplace && addend != 0) | |
11703 | { | |
11704 | bfd_size_type size; | |
11705 | bfd_reloc_status_type rstat; | |
11706 | bfd_byte *buf; | |
11707 | bfd_boolean ok; | |
11708 | const char *sym_name; | |
bb294208 | 11709 | bfd_size_type octets; |
c152c796 | 11710 | |
a50b1753 NC |
11711 | size = (bfd_size_type) bfd_get_reloc_size (howto); |
11712 | buf = (bfd_byte *) bfd_zmalloc (size); | |
6346d5ca | 11713 | if (buf == NULL && size != 0) |
c152c796 AM |
11714 | return FALSE; |
11715 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); | |
11716 | switch (rstat) | |
11717 | { | |
11718 | case bfd_reloc_ok: | |
11719 | break; | |
11720 | ||
11721 | default: | |
11722 | case bfd_reloc_outofrange: | |
11723 | abort (); | |
11724 | ||
11725 | case bfd_reloc_overflow: | |
11726 | if (link_order->type == bfd_section_reloc_link_order) | |
fd361982 | 11727 | sym_name = bfd_section_name (link_order->u.reloc.p->u.section); |
c152c796 AM |
11728 | else |
11729 | sym_name = link_order->u.reloc.p->u.name; | |
1a72702b AM |
11730 | (*info->callbacks->reloc_overflow) (info, NULL, sym_name, |
11731 | howto->name, addend, NULL, NULL, | |
11732 | (bfd_vma) 0); | |
c152c796 AM |
11733 | break; |
11734 | } | |
37b01f6a | 11735 | |
bb294208 AM |
11736 | octets = link_order->offset * bfd_octets_per_byte (output_bfd, |
11737 | output_section); | |
c152c796 | 11738 | ok = bfd_set_section_contents (output_bfd, output_section, buf, |
bb294208 | 11739 | octets, size); |
c152c796 AM |
11740 | free (buf); |
11741 | if (! ok) | |
11742 | return FALSE; | |
11743 | } | |
11744 | ||
11745 | /* The address of a reloc is relative to the section in a | |
11746 | relocatable file, and is a virtual address in an executable | |
11747 | file. */ | |
11748 | offset = link_order->offset; | |
0e1862bb | 11749 | if (! bfd_link_relocatable (info)) |
c152c796 AM |
11750 | offset += output_section->vma; |
11751 | ||
11752 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) | |
11753 | { | |
11754 | irel[i].r_offset = offset; | |
11755 | irel[i].r_info = 0; | |
11756 | irel[i].r_addend = 0; | |
11757 | } | |
11758 | if (bed->s->arch_size == 32) | |
11759 | irel[0].r_info = ELF32_R_INFO (indx, howto->type); | |
11760 | else | |
11761 | irel[0].r_info = ELF64_R_INFO (indx, howto->type); | |
11762 | ||
d4730f92 | 11763 | rel_hdr = reldata->hdr; |
c152c796 AM |
11764 | erel = rel_hdr->contents; |
11765 | if (rel_hdr->sh_type == SHT_REL) | |
11766 | { | |
d4730f92 | 11767 | erel += reldata->count * bed->s->sizeof_rel; |
c152c796 AM |
11768 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); |
11769 | } | |
11770 | else | |
11771 | { | |
11772 | irel[0].r_addend = addend; | |
d4730f92 | 11773 | erel += reldata->count * bed->s->sizeof_rela; |
c152c796 AM |
11774 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); |
11775 | } | |
11776 | ||
d4730f92 | 11777 | ++reldata->count; |
c152c796 AM |
11778 | |
11779 | return TRUE; | |
11780 | } | |
11781 | ||
0b52efa6 | 11782 | |
0b52efa6 PB |
11783 | /* Compare two sections based on the locations of the sections they are |
11784 | linked to. Used by elf_fixup_link_order. */ | |
11785 | ||
11786 | static int | |
8c1c5e5d | 11787 | compare_link_order (const void *a, const void *b) |
0b52efa6 | 11788 | { |
8c1c5e5d AM |
11789 | const struct bfd_link_order *alo = *(const struct bfd_link_order **) a; |
11790 | const struct bfd_link_order *blo = *(const struct bfd_link_order **) b; | |
11791 | asection *asec = elf_linked_to_section (alo->u.indirect.section); | |
11792 | asection *bsec = elf_linked_to_section (blo->u.indirect.section); | |
11793 | bfd_vma apos = asec->output_section->lma + asec->output_offset; | |
11794 | bfd_vma bpos = bsec->output_section->lma + bsec->output_offset; | |
0b52efa6 | 11795 | |
0b52efa6 PB |
11796 | if (apos < bpos) |
11797 | return -1; | |
8c1c5e5d AM |
11798 | if (apos > bpos) |
11799 | return 1; | |
11800 | ||
11801 | /* The only way we should get matching LMAs is when the first of two | |
11802 | sections has zero size. */ | |
11803 | if (asec->size < bsec->size) | |
11804 | return -1; | |
11805 | if (asec->size > bsec->size) | |
11806 | return 1; | |
11807 | ||
11808 | /* If they are both zero size then they almost certainly have the same | |
11809 | VMA and thus are not ordered with respect to each other. Test VMA | |
11810 | anyway, and fall back to id to make the result reproducible across | |
11811 | qsort implementations. */ | |
11812 | apos = asec->output_section->vma + asec->output_offset; | |
11813 | bpos = bsec->output_section->vma + bsec->output_offset; | |
11814 | if (apos < bpos) | |
11815 | return -1; | |
11816 | if (apos > bpos) | |
11817 | return 1; | |
11818 | ||
11819 | return asec->id - bsec->id; | |
0b52efa6 PB |
11820 | } |
11821 | ||
11822 | ||
11823 | /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same | |
11824 | order as their linked sections. Returns false if this could not be done | |
11825 | because an output section includes both ordered and unordered | |
11826 | sections. Ideally we'd do this in the linker proper. */ | |
11827 | ||
11828 | static bfd_boolean | |
11829 | elf_fixup_link_order (bfd *abfd, asection *o) | |
11830 | { | |
8c1c5e5d AM |
11831 | size_t seen_linkorder; |
11832 | size_t seen_other; | |
11833 | size_t n; | |
0b52efa6 PB |
11834 | struct bfd_link_order *p; |
11835 | bfd *sub; | |
0b52efa6 | 11836 | struct bfd_link_order **sections; |
66631823 CE |
11837 | asection *other_sec, *linkorder_sec; |
11838 | bfd_vma offset; /* Octets. */ | |
3b36f7e6 | 11839 | |
d33cdfe3 L |
11840 | other_sec = NULL; |
11841 | linkorder_sec = NULL; | |
0b52efa6 PB |
11842 | seen_other = 0; |
11843 | seen_linkorder = 0; | |
8423293d | 11844 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
0b52efa6 | 11845 | { |
d33cdfe3 | 11846 | if (p->type == bfd_indirect_link_order) |
0b52efa6 | 11847 | { |
66631823 | 11848 | asection *s = p->u.indirect.section; |
d33cdfe3 | 11849 | sub = s->owner; |
847d5183 AM |
11850 | if ((s->flags & SEC_LINKER_CREATED) == 0 |
11851 | && bfd_get_flavour (sub) == bfd_target_elf_flavour | |
8c1c5e5d AM |
11852 | && elf_section_data (s) != NULL |
11853 | && elf_linked_to_section (s) != NULL) | |
d33cdfe3 L |
11854 | { |
11855 | seen_linkorder++; | |
11856 | linkorder_sec = s; | |
11857 | } | |
0b52efa6 | 11858 | else |
d33cdfe3 L |
11859 | { |
11860 | seen_other++; | |
11861 | other_sec = s; | |
11862 | } | |
0b52efa6 PB |
11863 | } |
11864 | else | |
11865 | seen_other++; | |
d33cdfe3 L |
11866 | |
11867 | if (seen_other && seen_linkorder) | |
11868 | { | |
11869 | if (other_sec && linkorder_sec) | |
4eca0228 | 11870 | _bfd_error_handler |
695344c0 | 11871 | /* xgettext:c-format */ |
871b3ab2 AM |
11872 | (_("%pA has both ordered [`%pA' in %pB] " |
11873 | "and unordered [`%pA' in %pB] sections"), | |
63a5468a AM |
11874 | o, linkorder_sec, linkorder_sec->owner, |
11875 | other_sec, other_sec->owner); | |
d33cdfe3 | 11876 | else |
4eca0228 | 11877 | _bfd_error_handler |
871b3ab2 | 11878 | (_("%pA has both ordered and unordered sections"), o); |
d33cdfe3 L |
11879 | bfd_set_error (bfd_error_bad_value); |
11880 | return FALSE; | |
11881 | } | |
0b52efa6 PB |
11882 | } |
11883 | ||
11884 | if (!seen_linkorder) | |
11885 | return TRUE; | |
11886 | ||
8c1c5e5d | 11887 | sections = bfd_malloc (seen_linkorder * sizeof (*sections)); |
14b1c01e AM |
11888 | if (sections == NULL) |
11889 | return FALSE; | |
3b36f7e6 | 11890 | |
8c1c5e5d | 11891 | seen_linkorder = 0; |
8423293d | 11892 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
8c1c5e5d AM |
11893 | sections[seen_linkorder++] = p; |
11894 | ||
0b52efa6 | 11895 | /* Sort the input sections in the order of their linked section. */ |
8c1c5e5d | 11896 | qsort (sections, seen_linkorder, sizeof (*sections), compare_link_order); |
0b52efa6 PB |
11897 | |
11898 | /* Change the offsets of the sections. */ | |
11899 | offset = 0; | |
11900 | for (n = 0; n < seen_linkorder; n++) | |
11901 | { | |
8c1c5e5d | 11902 | bfd_vma mask; |
66631823 CE |
11903 | asection *s = sections[n]->u.indirect.section; |
11904 | unsigned int opb = bfd_octets_per_byte (abfd, s); | |
11905 | ||
11906 | mask = ~(bfd_vma) 0 << s->alignment_power * opb; | |
8c1c5e5d | 11907 | offset = (offset + ~mask) & mask; |
66631823 | 11908 | sections[n]->offset = s->output_offset = offset / opb; |
0b52efa6 PB |
11909 | offset += sections[n]->size; |
11910 | } | |
11911 | ||
4dd07732 | 11912 | free (sections); |
0b52efa6 PB |
11913 | return TRUE; |
11914 | } | |
11915 | ||
76359541 TP |
11916 | /* Generate an import library in INFO->implib_bfd from symbols in ABFD. |
11917 | Returns TRUE upon success, FALSE otherwise. */ | |
11918 | ||
11919 | static bfd_boolean | |
11920 | elf_output_implib (bfd *abfd, struct bfd_link_info *info) | |
11921 | { | |
11922 | bfd_boolean ret = FALSE; | |
11923 | bfd *implib_bfd; | |
11924 | const struct elf_backend_data *bed; | |
11925 | flagword flags; | |
11926 | enum bfd_architecture arch; | |
11927 | unsigned int mach; | |
11928 | asymbol **sympp = NULL; | |
11929 | long symsize; | |
11930 | long symcount; | |
11931 | long src_count; | |
11932 | elf_symbol_type *osymbuf; | |
446f7ed5 | 11933 | size_t amt; |
76359541 TP |
11934 | |
11935 | implib_bfd = info->out_implib_bfd; | |
11936 | bed = get_elf_backend_data (abfd); | |
11937 | ||
11938 | if (!bfd_set_format (implib_bfd, bfd_object)) | |
11939 | return FALSE; | |
11940 | ||
046734ff | 11941 | /* Use flag from executable but make it a relocatable object. */ |
76359541 TP |
11942 | flags = bfd_get_file_flags (abfd); |
11943 | flags &= ~HAS_RELOC; | |
11944 | if (!bfd_set_start_address (implib_bfd, 0) | |
046734ff | 11945 | || !bfd_set_file_flags (implib_bfd, flags & ~EXEC_P)) |
76359541 TP |
11946 | return FALSE; |
11947 | ||
11948 | /* Copy architecture of output file to import library file. */ | |
11949 | arch = bfd_get_arch (abfd); | |
11950 | mach = bfd_get_mach (abfd); | |
11951 | if (!bfd_set_arch_mach (implib_bfd, arch, mach) | |
11952 | && (abfd->target_defaulted | |
11953 | || bfd_get_arch (abfd) != bfd_get_arch (implib_bfd))) | |
11954 | return FALSE; | |
11955 | ||
11956 | /* Get symbol table size. */ | |
11957 | symsize = bfd_get_symtab_upper_bound (abfd); | |
11958 | if (symsize < 0) | |
11959 | return FALSE; | |
11960 | ||
11961 | /* Read in the symbol table. */ | |
ec9bd0a2 AM |
11962 | sympp = (asymbol **) bfd_malloc (symsize); |
11963 | if (sympp == NULL) | |
11964 | return FALSE; | |
11965 | ||
76359541 TP |
11966 | symcount = bfd_canonicalize_symtab (abfd, sympp); |
11967 | if (symcount < 0) | |
11968 | goto free_sym_buf; | |
11969 | ||
11970 | /* Allow the BFD backend to copy any private header data it | |
11971 | understands from the output BFD to the import library BFD. */ | |
11972 | if (! bfd_copy_private_header_data (abfd, implib_bfd)) | |
11973 | goto free_sym_buf; | |
11974 | ||
11975 | /* Filter symbols to appear in the import library. */ | |
11976 | if (bed->elf_backend_filter_implib_symbols) | |
11977 | symcount = bed->elf_backend_filter_implib_symbols (abfd, info, sympp, | |
11978 | symcount); | |
11979 | else | |
11980 | symcount = _bfd_elf_filter_global_symbols (abfd, info, sympp, symcount); | |
11981 | if (symcount == 0) | |
11982 | { | |
5df1bc57 | 11983 | bfd_set_error (bfd_error_no_symbols); |
871b3ab2 | 11984 | _bfd_error_handler (_("%pB: no symbol found for import library"), |
4eca0228 | 11985 | implib_bfd); |
76359541 TP |
11986 | goto free_sym_buf; |
11987 | } | |
11988 | ||
11989 | ||
11990 | /* Make symbols absolute. */ | |
446f7ed5 AM |
11991 | amt = symcount * sizeof (*osymbuf); |
11992 | osymbuf = (elf_symbol_type *) bfd_alloc (implib_bfd, amt); | |
ec9bd0a2 AM |
11993 | if (osymbuf == NULL) |
11994 | goto free_sym_buf; | |
11995 | ||
76359541 TP |
11996 | for (src_count = 0; src_count < symcount; src_count++) |
11997 | { | |
11998 | memcpy (&osymbuf[src_count], (elf_symbol_type *) sympp[src_count], | |
11999 | sizeof (*osymbuf)); | |
12000 | osymbuf[src_count].symbol.section = bfd_abs_section_ptr; | |
12001 | osymbuf[src_count].internal_elf_sym.st_shndx = SHN_ABS; | |
12002 | osymbuf[src_count].symbol.value += sympp[src_count]->section->vma; | |
12003 | osymbuf[src_count].internal_elf_sym.st_value = | |
12004 | osymbuf[src_count].symbol.value; | |
12005 | sympp[src_count] = &osymbuf[src_count].symbol; | |
12006 | } | |
12007 | ||
12008 | bfd_set_symtab (implib_bfd, sympp, symcount); | |
12009 | ||
12010 | /* Allow the BFD backend to copy any private data it understands | |
12011 | from the output BFD to the import library BFD. This is done last | |
12012 | to permit the routine to look at the filtered symbol table. */ | |
12013 | if (! bfd_copy_private_bfd_data (abfd, implib_bfd)) | |
12014 | goto free_sym_buf; | |
12015 | ||
12016 | if (!bfd_close (implib_bfd)) | |
12017 | goto free_sym_buf; | |
12018 | ||
12019 | ret = TRUE; | |
12020 | ||
dc1e8a47 | 12021 | free_sym_buf: |
76359541 TP |
12022 | free (sympp); |
12023 | return ret; | |
12024 | } | |
12025 | ||
9f7c3e5e AM |
12026 | static void |
12027 | elf_final_link_free (bfd *obfd, struct elf_final_link_info *flinfo) | |
12028 | { | |
12029 | asection *o; | |
12030 | ||
12031 | if (flinfo->symstrtab != NULL) | |
ef10c3ac | 12032 | _bfd_elf_strtab_free (flinfo->symstrtab); |
c9594989 AM |
12033 | free (flinfo->contents); |
12034 | free (flinfo->external_relocs); | |
12035 | free (flinfo->internal_relocs); | |
12036 | free (flinfo->external_syms); | |
12037 | free (flinfo->locsym_shndx); | |
12038 | free (flinfo->internal_syms); | |
12039 | free (flinfo->indices); | |
12040 | free (flinfo->sections); | |
12041 | if (flinfo->symshndxbuf != (Elf_External_Sym_Shndx *) -1) | |
9f7c3e5e AM |
12042 | free (flinfo->symshndxbuf); |
12043 | for (o = obfd->sections; o != NULL; o = o->next) | |
12044 | { | |
12045 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
c9594989 AM |
12046 | free (esdo->rel.hashes); |
12047 | free (esdo->rela.hashes); | |
9f7c3e5e AM |
12048 | } |
12049 | } | |
0b52efa6 | 12050 | |
c152c796 AM |
12051 | /* Do the final step of an ELF link. */ |
12052 | ||
12053 | bfd_boolean | |
12054 | bfd_elf_final_link (bfd *abfd, struct bfd_link_info *info) | |
12055 | { | |
12056 | bfd_boolean dynamic; | |
12057 | bfd_boolean emit_relocs; | |
12058 | bfd *dynobj; | |
8b127cbc | 12059 | struct elf_final_link_info flinfo; |
91d6fa6a NC |
12060 | asection *o; |
12061 | struct bfd_link_order *p; | |
12062 | bfd *sub; | |
c152c796 AM |
12063 | bfd_size_type max_contents_size; |
12064 | bfd_size_type max_external_reloc_size; | |
12065 | bfd_size_type max_internal_reloc_count; | |
12066 | bfd_size_type max_sym_count; | |
12067 | bfd_size_type max_sym_shndx_count; | |
c152c796 AM |
12068 | Elf_Internal_Sym elfsym; |
12069 | unsigned int i; | |
12070 | Elf_Internal_Shdr *symtab_hdr; | |
12071 | Elf_Internal_Shdr *symtab_shndx_hdr; | |
c152c796 AM |
12072 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
12073 | struct elf_outext_info eoinfo; | |
12074 | bfd_boolean merged; | |
12075 | size_t relativecount = 0; | |
12076 | asection *reldyn = 0; | |
12077 | bfd_size_type amt; | |
104d59d1 JM |
12078 | asection *attr_section = NULL; |
12079 | bfd_vma attr_size = 0; | |
12080 | const char *std_attrs_section; | |
64f52338 | 12081 | struct elf_link_hash_table *htab = elf_hash_table (info); |
4c6ee646 | 12082 | bfd_boolean sections_removed; |
496afd17 | 12083 | bfd_boolean ret; |
c152c796 | 12084 | |
64f52338 | 12085 | if (!is_elf_hash_table (htab)) |
c152c796 AM |
12086 | return FALSE; |
12087 | ||
0e1862bb | 12088 | if (bfd_link_pic (info)) |
c152c796 AM |
12089 | abfd->flags |= DYNAMIC; |
12090 | ||
64f52338 AM |
12091 | dynamic = htab->dynamic_sections_created; |
12092 | dynobj = htab->dynobj; | |
c152c796 | 12093 | |
0e1862bb | 12094 | emit_relocs = (bfd_link_relocatable (info) |
a4676736 | 12095 | || info->emitrelocations); |
c152c796 | 12096 | |
496afd17 | 12097 | memset (&flinfo, 0, sizeof (flinfo)); |
8b127cbc AM |
12098 | flinfo.info = info; |
12099 | flinfo.output_bfd = abfd; | |
ef10c3ac | 12100 | flinfo.symstrtab = _bfd_elf_strtab_init (); |
8b127cbc | 12101 | if (flinfo.symstrtab == NULL) |
c152c796 AM |
12102 | return FALSE; |
12103 | ||
12104 | if (! dynamic) | |
12105 | { | |
8b127cbc AM |
12106 | flinfo.hash_sec = NULL; |
12107 | flinfo.symver_sec = NULL; | |
c152c796 AM |
12108 | } |
12109 | else | |
12110 | { | |
3d4d4302 | 12111 | flinfo.hash_sec = bfd_get_linker_section (dynobj, ".hash"); |
202e2356 | 12112 | /* Note that dynsym_sec can be NULL (on VMS). */ |
3d4d4302 | 12113 | flinfo.symver_sec = bfd_get_linker_section (dynobj, ".gnu.version"); |
c152c796 AM |
12114 | /* Note that it is OK if symver_sec is NULL. */ |
12115 | } | |
12116 | ||
496afd17 L |
12117 | if (info->unique_symbol |
12118 | && !bfd_hash_table_init (&flinfo.local_hash_table, | |
12119 | local_hash_newfunc, | |
12120 | sizeof (struct local_hash_entry))) | |
12121 | return FALSE; | |
c152c796 | 12122 | |
104d59d1 JM |
12123 | /* The object attributes have been merged. Remove the input |
12124 | sections from the link, and set the contents of the output | |
1ff6de03 | 12125 | section. */ |
4c6ee646 | 12126 | sections_removed = FALSE; |
104d59d1 JM |
12127 | std_attrs_section = get_elf_backend_data (abfd)->obj_attrs_section; |
12128 | for (o = abfd->sections; o != NULL; o = o->next) | |
12129 | { | |
5270eddc | 12130 | bfd_boolean remove_section = FALSE; |
b8a6ced7 | 12131 | |
104d59d1 JM |
12132 | if ((std_attrs_section && strcmp (o->name, std_attrs_section) == 0) |
12133 | || strcmp (o->name, ".gnu.attributes") == 0) | |
12134 | { | |
12135 | for (p = o->map_head.link_order; p != NULL; p = p->next) | |
12136 | { | |
12137 | asection *input_section; | |
12138 | ||
12139 | if (p->type != bfd_indirect_link_order) | |
12140 | continue; | |
12141 | input_section = p->u.indirect.section; | |
12142 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
12143 | elf_link_input_bfd ignores this section. */ | |
12144 | input_section->flags &= ~SEC_HAS_CONTENTS; | |
12145 | } | |
a0c8462f | 12146 | |
104d59d1 | 12147 | attr_size = bfd_elf_obj_attr_size (abfd); |
fd361982 | 12148 | bfd_set_section_size (o, attr_size); |
b8a6ced7 AM |
12149 | /* Skip this section later on. */ |
12150 | o->map_head.link_order = NULL; | |
104d59d1 | 12151 | if (attr_size) |
b8a6ced7 | 12152 | attr_section = o; |
104d59d1 | 12153 | else |
5270eddc | 12154 | remove_section = TRUE; |
104d59d1 | 12155 | } |
6e5e9d58 AM |
12156 | else if ((o->flags & SEC_GROUP) != 0 && o->size == 0) |
12157 | { | |
12158 | /* Remove empty group section from linker output. */ | |
5270eddc | 12159 | remove_section = TRUE; |
b8a6ced7 | 12160 | } |
5270eddc | 12161 | if (remove_section) |
b8a6ced7 | 12162 | { |
6e5e9d58 AM |
12163 | o->flags |= SEC_EXCLUDE; |
12164 | bfd_section_list_remove (abfd, o); | |
12165 | abfd->section_count--; | |
4c6ee646 | 12166 | sections_removed = TRUE; |
6e5e9d58 | 12167 | } |
104d59d1 | 12168 | } |
4c6ee646 AM |
12169 | if (sections_removed) |
12170 | _bfd_fix_excluded_sec_syms (abfd, info); | |
104d59d1 | 12171 | |
c152c796 AM |
12172 | /* Count up the number of relocations we will output for each output |
12173 | section, so that we know the sizes of the reloc sections. We | |
12174 | also figure out some maximum sizes. */ | |
12175 | max_contents_size = 0; | |
12176 | max_external_reloc_size = 0; | |
12177 | max_internal_reloc_count = 0; | |
12178 | max_sym_count = 0; | |
12179 | max_sym_shndx_count = 0; | |
12180 | merged = FALSE; | |
12181 | for (o = abfd->sections; o != NULL; o = o->next) | |
12182 | { | |
12183 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
12184 | o->reloc_count = 0; | |
12185 | ||
8423293d | 12186 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
12187 | { |
12188 | unsigned int reloc_count = 0; | |
9eaff861 | 12189 | unsigned int additional_reloc_count = 0; |
c152c796 | 12190 | struct bfd_elf_section_data *esdi = NULL; |
c152c796 AM |
12191 | |
12192 | if (p->type == bfd_section_reloc_link_order | |
12193 | || p->type == bfd_symbol_reloc_link_order) | |
12194 | reloc_count = 1; | |
12195 | else if (p->type == bfd_indirect_link_order) | |
12196 | { | |
12197 | asection *sec; | |
12198 | ||
12199 | sec = p->u.indirect.section; | |
c152c796 AM |
12200 | |
12201 | /* Mark all sections which are to be included in the | |
12202 | link. This will normally be every section. We need | |
12203 | to do this so that we can identify any sections which | |
12204 | the linker has decided to not include. */ | |
12205 | sec->linker_mark = TRUE; | |
12206 | ||
12207 | if (sec->flags & SEC_MERGE) | |
12208 | merged = TRUE; | |
12209 | ||
eea6121a AM |
12210 | if (sec->rawsize > max_contents_size) |
12211 | max_contents_size = sec->rawsize; | |
12212 | if (sec->size > max_contents_size) | |
12213 | max_contents_size = sec->size; | |
c152c796 | 12214 | |
c152c796 AM |
12215 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour |
12216 | && (sec->owner->flags & DYNAMIC) == 0) | |
12217 | { | |
12218 | size_t sym_count; | |
12219 | ||
a961cdd5 AM |
12220 | /* We are interested in just local symbols, not all |
12221 | symbols. */ | |
c152c796 AM |
12222 | if (elf_bad_symtab (sec->owner)) |
12223 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
12224 | / bed->s->sizeof_sym); | |
12225 | else | |
12226 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
12227 | ||
12228 | if (sym_count > max_sym_count) | |
12229 | max_sym_count = sym_count; | |
12230 | ||
12231 | if (sym_count > max_sym_shndx_count | |
6a40cf0c | 12232 | && elf_symtab_shndx_list (sec->owner) != NULL) |
c152c796 AM |
12233 | max_sym_shndx_count = sym_count; |
12234 | ||
a961cdd5 AM |
12235 | if (esdo->this_hdr.sh_type == SHT_REL |
12236 | || esdo->this_hdr.sh_type == SHT_RELA) | |
12237 | /* Some backends use reloc_count in relocation sections | |
12238 | to count particular types of relocs. Of course, | |
12239 | reloc sections themselves can't have relocations. */ | |
12240 | ; | |
12241 | else if (emit_relocs) | |
12242 | { | |
12243 | reloc_count = sec->reloc_count; | |
12244 | if (bed->elf_backend_count_additional_relocs) | |
12245 | { | |
12246 | int c; | |
12247 | c = (*bed->elf_backend_count_additional_relocs) (sec); | |
12248 | additional_reloc_count += c; | |
12249 | } | |
12250 | } | |
12251 | else if (bed->elf_backend_count_relocs) | |
12252 | reloc_count = (*bed->elf_backend_count_relocs) (info, sec); | |
12253 | ||
12254 | esdi = elf_section_data (sec); | |
12255 | ||
c152c796 AM |
12256 | if ((sec->flags & SEC_RELOC) != 0) |
12257 | { | |
d4730f92 | 12258 | size_t ext_size = 0; |
c152c796 | 12259 | |
d4730f92 BS |
12260 | if (esdi->rel.hdr != NULL) |
12261 | ext_size = esdi->rel.hdr->sh_size; | |
12262 | if (esdi->rela.hdr != NULL) | |
12263 | ext_size += esdi->rela.hdr->sh_size; | |
7326c758 | 12264 | |
c152c796 AM |
12265 | if (ext_size > max_external_reloc_size) |
12266 | max_external_reloc_size = ext_size; | |
12267 | if (sec->reloc_count > max_internal_reloc_count) | |
12268 | max_internal_reloc_count = sec->reloc_count; | |
12269 | } | |
12270 | } | |
12271 | } | |
12272 | ||
12273 | if (reloc_count == 0) | |
12274 | continue; | |
12275 | ||
9eaff861 | 12276 | reloc_count += additional_reloc_count; |
c152c796 AM |
12277 | o->reloc_count += reloc_count; |
12278 | ||
0e1862bb | 12279 | if (p->type == bfd_indirect_link_order && emit_relocs) |
c152c796 | 12280 | { |
d4730f92 | 12281 | if (esdi->rel.hdr) |
9eaff861 | 12282 | { |
491d01d3 | 12283 | esdo->rel.count += NUM_SHDR_ENTRIES (esdi->rel.hdr); |
9eaff861 AO |
12284 | esdo->rel.count += additional_reloc_count; |
12285 | } | |
d4730f92 | 12286 | if (esdi->rela.hdr) |
9eaff861 | 12287 | { |
491d01d3 | 12288 | esdo->rela.count += NUM_SHDR_ENTRIES (esdi->rela.hdr); |
9eaff861 AO |
12289 | esdo->rela.count += additional_reloc_count; |
12290 | } | |
d4730f92 BS |
12291 | } |
12292 | else | |
12293 | { | |
12294 | if (o->use_rela_p) | |
12295 | esdo->rela.count += reloc_count; | |
2c2b4ed4 | 12296 | else |
d4730f92 | 12297 | esdo->rel.count += reloc_count; |
c152c796 | 12298 | } |
c152c796 AM |
12299 | } |
12300 | ||
9eaff861 | 12301 | if (o->reloc_count > 0) |
c152c796 AM |
12302 | o->flags |= SEC_RELOC; |
12303 | else | |
12304 | { | |
12305 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
12306 | set it (this is probably a bug) and if it is set | |
12307 | assign_section_numbers will create a reloc section. */ | |
12308 | o->flags &=~ SEC_RELOC; | |
12309 | } | |
12310 | ||
12311 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
12312 | zero. This is done in elf_fake_sections as well, but forcing | |
12313 | the VMA to 0 here will ensure that relocs against these | |
12314 | sections are handled correctly. */ | |
12315 | if ((o->flags & SEC_ALLOC) == 0 | |
12316 | && ! o->user_set_vma) | |
12317 | o->vma = 0; | |
12318 | } | |
12319 | ||
0e1862bb | 12320 | if (! bfd_link_relocatable (info) && merged) |
64f52338 | 12321 | elf_link_hash_traverse (htab, _bfd_elf_link_sec_merge_syms, abfd); |
c152c796 AM |
12322 | |
12323 | /* Figure out the file positions for everything but the symbol table | |
12324 | and the relocs. We set symcount to force assign_section_numbers | |
12325 | to create a symbol table. */ | |
ed48ec2e | 12326 | abfd->symcount = info->strip != strip_all || emit_relocs; |
c152c796 AM |
12327 | BFD_ASSERT (! abfd->output_has_begun); |
12328 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
12329 | goto error_return; | |
12330 | ||
ee75fd95 | 12331 | /* Set sizes, and assign file positions for reloc sections. */ |
c152c796 AM |
12332 | for (o = abfd->sections; o != NULL; o = o->next) |
12333 | { | |
d4730f92 | 12334 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
c152c796 AM |
12335 | if ((o->flags & SEC_RELOC) != 0) |
12336 | { | |
d4730f92 | 12337 | if (esdo->rel.hdr |
9eaff861 | 12338 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rel))) |
c152c796 AM |
12339 | goto error_return; |
12340 | ||
d4730f92 | 12341 | if (esdo->rela.hdr |
9eaff861 | 12342 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rela))) |
c152c796 AM |
12343 | goto error_return; |
12344 | } | |
12345 | ||
48db3297 AM |
12346 | /* _bfd_elf_compute_section_file_positions makes temporary use |
12347 | of target_index. Reset it. */ | |
12348 | o->target_index = 0; | |
12349 | ||
c152c796 AM |
12350 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them |
12351 | to count upwards while actually outputting the relocations. */ | |
d4730f92 BS |
12352 | esdo->rel.count = 0; |
12353 | esdo->rela.count = 0; | |
0ce398f1 | 12354 | |
1ff6de03 NA |
12355 | if ((esdo->this_hdr.sh_offset == (file_ptr) -1) |
12356 | && !bfd_section_is_ctf (o)) | |
0ce398f1 L |
12357 | { |
12358 | /* Cache the section contents so that they can be compressed | |
12359 | later. Use bfd_malloc since it will be freed by | |
12360 | bfd_compress_section_contents. */ | |
12361 | unsigned char *contents = esdo->this_hdr.contents; | |
12362 | if ((o->flags & SEC_ELF_COMPRESS) == 0 || contents != NULL) | |
12363 | abort (); | |
12364 | contents | |
12365 | = (unsigned char *) bfd_malloc (esdo->this_hdr.sh_size); | |
12366 | if (contents == NULL) | |
12367 | goto error_return; | |
12368 | esdo->this_hdr.contents = contents; | |
12369 | } | |
c152c796 AM |
12370 | } |
12371 | ||
1ff6de03 NA |
12372 | /* We have now assigned file positions for all the sections except .symtab, |
12373 | .strtab, and non-loaded reloc and compressed debugging sections. We start | |
12374 | the .symtab section at the current file position, and write directly to it. | |
12375 | We build the .strtab section in memory. */ | |
ed48ec2e | 12376 | abfd->symcount = 0; |
c152c796 AM |
12377 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
12378 | /* sh_name is set in prep_headers. */ | |
12379 | symtab_hdr->sh_type = SHT_SYMTAB; | |
12380 | /* sh_flags, sh_addr and sh_size all start off zero. */ | |
12381 | symtab_hdr->sh_entsize = bed->s->sizeof_sym; | |
12382 | /* sh_link is set in assign_section_numbers. */ | |
12383 | /* sh_info is set below. */ | |
12384 | /* sh_offset is set just below. */ | |
72de5009 | 12385 | symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align; |
c152c796 | 12386 | |
ef10c3ac L |
12387 | if (max_sym_count < 20) |
12388 | max_sym_count = 20; | |
64f52338 | 12389 | htab->strtabsize = max_sym_count; |
ef10c3ac | 12390 | amt = max_sym_count * sizeof (struct elf_sym_strtab); |
64f52338 AM |
12391 | htab->strtab = (struct elf_sym_strtab *) bfd_malloc (amt); |
12392 | if (htab->strtab == NULL) | |
c152c796 | 12393 | goto error_return; |
ef10c3ac L |
12394 | /* The real buffer will be allocated in elf_link_swap_symbols_out. */ |
12395 | flinfo.symshndxbuf | |
12396 | = (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF) | |
12397 | ? (Elf_External_Sym_Shndx *) -1 : NULL); | |
c152c796 | 12398 | |
8539e4e8 | 12399 | if (info->strip != strip_all || emit_relocs) |
c152c796 | 12400 | { |
c77cb2a0 MR |
12401 | bfd_boolean name_local_sections; |
12402 | const char *name; | |
12403 | ||
8539e4e8 AM |
12404 | file_ptr off = elf_next_file_pos (abfd); |
12405 | ||
12406 | _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE); | |
12407 | ||
12408 | /* Note that at this point elf_next_file_pos (abfd) is | |
12409 | incorrect. We do not yet know the size of the .symtab section. | |
12410 | We correct next_file_pos below, after we do know the size. */ | |
12411 | ||
12412 | /* Start writing out the symbol table. The first symbol is always a | |
12413 | dummy symbol. */ | |
c152c796 AM |
12414 | elfsym.st_value = 0; |
12415 | elfsym.st_size = 0; | |
12416 | elfsym.st_info = 0; | |
12417 | elfsym.st_other = 0; | |
12418 | elfsym.st_shndx = SHN_UNDEF; | |
35fc36a8 | 12419 | elfsym.st_target_internal = 0; |
ef10c3ac L |
12420 | if (elf_link_output_symstrtab (&flinfo, NULL, &elfsym, |
12421 | bfd_und_section_ptr, NULL) != 1) | |
c152c796 | 12422 | goto error_return; |
c152c796 | 12423 | |
8539e4e8 AM |
12424 | /* Output a symbol for each section. We output these even if we are |
12425 | discarding local symbols, since they are used for relocs. These | |
c77cb2a0 MR |
12426 | symbols usually have no names. We store the index of each one in |
12427 | the index field of the section, so that we can find it again when | |
8539e4e8 AM |
12428 | outputting relocs. */ |
12429 | ||
c77cb2a0 MR |
12430 | name_local_sections |
12431 | = (bed->elf_backend_name_local_section_symbols | |
12432 | && bed->elf_backend_name_local_section_symbols (abfd)); | |
12433 | ||
12434 | name = NULL; | |
c152c796 AM |
12435 | elfsym.st_size = 0; |
12436 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
12437 | elfsym.st_other = 0; | |
f0b5bb34 | 12438 | elfsym.st_value = 0; |
35fc36a8 | 12439 | elfsym.st_target_internal = 0; |
c152c796 AM |
12440 | for (i = 1; i < elf_numsections (abfd); i++) |
12441 | { | |
12442 | o = bfd_section_from_elf_index (abfd, i); | |
12443 | if (o != NULL) | |
f0b5bb34 AM |
12444 | { |
12445 | o->target_index = bfd_get_symcount (abfd); | |
12446 | elfsym.st_shndx = i; | |
0e1862bb | 12447 | if (!bfd_link_relocatable (info)) |
f0b5bb34 | 12448 | elfsym.st_value = o->vma; |
c77cb2a0 MR |
12449 | if (name_local_sections) |
12450 | name = o->name; | |
12451 | if (elf_link_output_symstrtab (&flinfo, name, &elfsym, o, | |
ef10c3ac | 12452 | NULL) != 1) |
f0b5bb34 AM |
12453 | goto error_return; |
12454 | } | |
c152c796 AM |
12455 | } |
12456 | } | |
12457 | ||
3f1b17bb MR |
12458 | /* On some targets like Irix 5 the symbol split between local and global |
12459 | ones recorded in the sh_info field needs to be done between section | |
12460 | and all other symbols. */ | |
12461 | if (bed->elf_backend_elfsym_local_is_section | |
12462 | && bed->elf_backend_elfsym_local_is_section (abfd)) | |
12463 | symtab_hdr->sh_info = bfd_get_symcount (abfd); | |
12464 | ||
c152c796 AM |
12465 | /* Allocate some memory to hold information read in from the input |
12466 | files. */ | |
12467 | if (max_contents_size != 0) | |
12468 | { | |
8b127cbc AM |
12469 | flinfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
12470 | if (flinfo.contents == NULL) | |
c152c796 AM |
12471 | goto error_return; |
12472 | } | |
12473 | ||
12474 | if (max_external_reloc_size != 0) | |
12475 | { | |
8b127cbc AM |
12476 | flinfo.external_relocs = bfd_malloc (max_external_reloc_size); |
12477 | if (flinfo.external_relocs == NULL) | |
c152c796 AM |
12478 | goto error_return; |
12479 | } | |
12480 | ||
12481 | if (max_internal_reloc_count != 0) | |
12482 | { | |
056bafd4 | 12483 | amt = max_internal_reloc_count * sizeof (Elf_Internal_Rela); |
8b127cbc AM |
12484 | flinfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); |
12485 | if (flinfo.internal_relocs == NULL) | |
c152c796 AM |
12486 | goto error_return; |
12487 | } | |
12488 | ||
12489 | if (max_sym_count != 0) | |
12490 | { | |
12491 | amt = max_sym_count * bed->s->sizeof_sym; | |
8b127cbc AM |
12492 | flinfo.external_syms = (bfd_byte *) bfd_malloc (amt); |
12493 | if (flinfo.external_syms == NULL) | |
c152c796 AM |
12494 | goto error_return; |
12495 | ||
12496 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
8b127cbc AM |
12497 | flinfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt); |
12498 | if (flinfo.internal_syms == NULL) | |
c152c796 AM |
12499 | goto error_return; |
12500 | ||
12501 | amt = max_sym_count * sizeof (long); | |
8b127cbc AM |
12502 | flinfo.indices = (long int *) bfd_malloc (amt); |
12503 | if (flinfo.indices == NULL) | |
c152c796 AM |
12504 | goto error_return; |
12505 | ||
12506 | amt = max_sym_count * sizeof (asection *); | |
8b127cbc AM |
12507 | flinfo.sections = (asection **) bfd_malloc (amt); |
12508 | if (flinfo.sections == NULL) | |
c152c796 AM |
12509 | goto error_return; |
12510 | } | |
12511 | ||
12512 | if (max_sym_shndx_count != 0) | |
12513 | { | |
12514 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
8b127cbc AM |
12515 | flinfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); |
12516 | if (flinfo.locsym_shndx == NULL) | |
c152c796 AM |
12517 | goto error_return; |
12518 | } | |
12519 | ||
64f52338 | 12520 | if (htab->tls_sec) |
c152c796 | 12521 | { |
66631823 | 12522 | bfd_vma base, end = 0; /* Both bytes. */ |
c152c796 AM |
12523 | asection *sec; |
12524 | ||
64f52338 | 12525 | for (sec = htab->tls_sec; |
c152c796 AM |
12526 | sec && (sec->flags & SEC_THREAD_LOCAL); |
12527 | sec = sec->next) | |
12528 | { | |
3a800eb9 | 12529 | bfd_size_type size = sec->size; |
66631823 | 12530 | unsigned int opb = bfd_octets_per_byte (abfd, sec); |
c152c796 | 12531 | |
3a800eb9 AM |
12532 | if (size == 0 |
12533 | && (sec->flags & SEC_HAS_CONTENTS) == 0) | |
c152c796 | 12534 | { |
91d6fa6a NC |
12535 | struct bfd_link_order *ord = sec->map_tail.link_order; |
12536 | ||
12537 | if (ord != NULL) | |
66631823 | 12538 | size = ord->offset * opb + ord->size; |
c152c796 | 12539 | } |
66631823 | 12540 | end = sec->vma + size / opb; |
c152c796 | 12541 | } |
64f52338 | 12542 | base = htab->tls_sec->vma; |
7dc98aea RO |
12543 | /* Only align end of TLS section if static TLS doesn't have special |
12544 | alignment requirements. */ | |
12545 | if (bed->static_tls_alignment == 1) | |
64f52338 AM |
12546 | end = align_power (end, htab->tls_sec->alignment_power); |
12547 | htab->tls_size = end - base; | |
c152c796 AM |
12548 | } |
12549 | ||
0b52efa6 PB |
12550 | /* Reorder SHF_LINK_ORDER sections. */ |
12551 | for (o = abfd->sections; o != NULL; o = o->next) | |
12552 | { | |
12553 | if (!elf_fixup_link_order (abfd, o)) | |
12554 | return FALSE; | |
12555 | } | |
12556 | ||
2f0c68f2 CM |
12557 | if (!_bfd_elf_fixup_eh_frame_hdr (info)) |
12558 | return FALSE; | |
12559 | ||
c152c796 AM |
12560 | /* Since ELF permits relocations to be against local symbols, we |
12561 | must have the local symbols available when we do the relocations. | |
12562 | Since we would rather only read the local symbols once, and we | |
12563 | would rather not keep them in memory, we handle all the | |
12564 | relocations for a single input file at the same time. | |
12565 | ||
12566 | Unfortunately, there is no way to know the total number of local | |
12567 | symbols until we have seen all of them, and the local symbol | |
12568 | indices precede the global symbol indices. This means that when | |
12569 | we are generating relocatable output, and we see a reloc against | |
12570 | a global symbol, we can not know the symbol index until we have | |
12571 | finished examining all the local symbols to see which ones we are | |
12572 | going to output. To deal with this, we keep the relocations in | |
12573 | memory, and don't output them until the end of the link. This is | |
12574 | an unfortunate waste of memory, but I don't see a good way around | |
12575 | it. Fortunately, it only happens when performing a relocatable | |
12576 | link, which is not the common case. FIXME: If keep_memory is set | |
12577 | we could write the relocs out and then read them again; I don't | |
12578 | know how bad the memory loss will be. */ | |
12579 | ||
c72f2fb2 | 12580 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
12581 | sub->output_has_begun = FALSE; |
12582 | for (o = abfd->sections; o != NULL; o = o->next) | |
12583 | { | |
8423293d | 12584 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
12585 | { |
12586 | if (p->type == bfd_indirect_link_order | |
12587 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) | |
12588 | == bfd_target_elf_flavour) | |
12589 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) | |
12590 | { | |
12591 | if (! sub->output_has_begun) | |
12592 | { | |
8b127cbc | 12593 | if (! elf_link_input_bfd (&flinfo, sub)) |
c152c796 AM |
12594 | goto error_return; |
12595 | sub->output_has_begun = TRUE; | |
12596 | } | |
12597 | } | |
12598 | else if (p->type == bfd_section_reloc_link_order | |
12599 | || p->type == bfd_symbol_reloc_link_order) | |
12600 | { | |
12601 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
12602 | goto error_return; | |
12603 | } | |
12604 | else | |
12605 | { | |
12606 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
351f65ca L |
12607 | { |
12608 | if (p->type == bfd_indirect_link_order | |
12609 | && (bfd_get_flavour (sub) | |
12610 | == bfd_target_elf_flavour) | |
12611 | && (elf_elfheader (sub)->e_ident[EI_CLASS] | |
12612 | != bed->s->elfclass)) | |
12613 | { | |
12614 | const char *iclass, *oclass; | |
12615 | ||
aebf9be7 | 12616 | switch (bed->s->elfclass) |
351f65ca | 12617 | { |
aebf9be7 NC |
12618 | case ELFCLASS64: oclass = "ELFCLASS64"; break; |
12619 | case ELFCLASS32: oclass = "ELFCLASS32"; break; | |
12620 | case ELFCLASSNONE: oclass = "ELFCLASSNONE"; break; | |
12621 | default: abort (); | |
351f65ca | 12622 | } |
aebf9be7 NC |
12623 | |
12624 | switch (elf_elfheader (sub)->e_ident[EI_CLASS]) | |
351f65ca | 12625 | { |
aebf9be7 NC |
12626 | case ELFCLASS64: iclass = "ELFCLASS64"; break; |
12627 | case ELFCLASS32: iclass = "ELFCLASS32"; break; | |
12628 | case ELFCLASSNONE: iclass = "ELFCLASSNONE"; break; | |
12629 | default: abort (); | |
351f65ca L |
12630 | } |
12631 | ||
12632 | bfd_set_error (bfd_error_wrong_format); | |
4eca0228 | 12633 | _bfd_error_handler |
695344c0 | 12634 | /* xgettext:c-format */ |
871b3ab2 | 12635 | (_("%pB: file class %s incompatible with %s"), |
351f65ca L |
12636 | sub, iclass, oclass); |
12637 | } | |
12638 | ||
12639 | goto error_return; | |
12640 | } | |
c152c796 AM |
12641 | } |
12642 | } | |
12643 | } | |
12644 | ||
c0f00686 L |
12645 | /* Free symbol buffer if needed. */ |
12646 | if (!info->reduce_memory_overheads) | |
12647 | { | |
c72f2fb2 | 12648 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c9594989 | 12649 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour) |
c0f00686 L |
12650 | { |
12651 | free (elf_tdata (sub)->symbuf); | |
12652 | elf_tdata (sub)->symbuf = NULL; | |
12653 | } | |
12654 | } | |
12655 | ||
496afd17 L |
12656 | ret = TRUE; |
12657 | ||
c152c796 AM |
12658 | /* Output any global symbols that got converted to local in a |
12659 | version script or due to symbol visibility. We do this in a | |
12660 | separate step since ELF requires all local symbols to appear | |
12661 | prior to any global symbols. FIXME: We should only do this if | |
12662 | some global symbols were, in fact, converted to become local. | |
12663 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
12664 | eoinfo.failed = FALSE; | |
8b127cbc | 12665 | eoinfo.flinfo = &flinfo; |
c152c796 | 12666 | eoinfo.localsyms = TRUE; |
34a79995 | 12667 | eoinfo.file_sym_done = FALSE; |
7686d77d | 12668 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 | 12669 | if (eoinfo.failed) |
496afd17 L |
12670 | { |
12671 | ret = FALSE; | |
12672 | goto return_local_hash_table; | |
12673 | } | |
c152c796 | 12674 | |
4e617b1e PB |
12675 | /* If backend needs to output some local symbols not present in the hash |
12676 | table, do it now. */ | |
8539e4e8 AM |
12677 | if (bed->elf_backend_output_arch_local_syms |
12678 | && (info->strip != strip_all || emit_relocs)) | |
4e617b1e | 12679 | { |
6e0b88f1 | 12680 | typedef int (*out_sym_func) |
4e617b1e PB |
12681 | (void *, const char *, Elf_Internal_Sym *, asection *, |
12682 | struct elf_link_hash_entry *); | |
12683 | ||
12684 | if (! ((*bed->elf_backend_output_arch_local_syms) | |
ef10c3ac L |
12685 | (abfd, info, &flinfo, |
12686 | (out_sym_func) elf_link_output_symstrtab))) | |
496afd17 L |
12687 | { |
12688 | ret = FALSE; | |
12689 | goto return_local_hash_table; | |
12690 | } | |
4e617b1e PB |
12691 | } |
12692 | ||
c152c796 AM |
12693 | /* That wrote out all the local symbols. Finish up the symbol table |
12694 | with the global symbols. Even if we want to strip everything we | |
12695 | can, we still need to deal with those global symbols that got | |
12696 | converted to local in a version script. */ | |
12697 | ||
12698 | /* The sh_info field records the index of the first non local symbol. */ | |
3f1b17bb MR |
12699 | if (!symtab_hdr->sh_info) |
12700 | symtab_hdr->sh_info = bfd_get_symcount (abfd); | |
c152c796 AM |
12701 | |
12702 | if (dynamic | |
64f52338 AM |
12703 | && htab->dynsym != NULL |
12704 | && htab->dynsym->output_section != bfd_abs_section_ptr) | |
c152c796 AM |
12705 | { |
12706 | Elf_Internal_Sym sym; | |
64f52338 | 12707 | bfd_byte *dynsym = htab->dynsym->contents; |
90ac2420 | 12708 | |
64f52338 AM |
12709 | o = htab->dynsym->output_section; |
12710 | elf_section_data (o)->this_hdr.sh_info = htab->local_dynsymcount + 1; | |
c152c796 AM |
12711 | |
12712 | /* Write out the section symbols for the output sections. */ | |
0e1862bb | 12713 | if (bfd_link_pic (info) |
64f52338 | 12714 | || htab->is_relocatable_executable) |
c152c796 AM |
12715 | { |
12716 | asection *s; | |
12717 | ||
12718 | sym.st_size = 0; | |
12719 | sym.st_name = 0; | |
12720 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
12721 | sym.st_other = 0; | |
35fc36a8 | 12722 | sym.st_target_internal = 0; |
c152c796 AM |
12723 | |
12724 | for (s = abfd->sections; s != NULL; s = s->next) | |
12725 | { | |
12726 | int indx; | |
12727 | bfd_byte *dest; | |
12728 | long dynindx; | |
12729 | ||
c152c796 | 12730 | dynindx = elf_section_data (s)->dynindx; |
8c37241b JJ |
12731 | if (dynindx <= 0) |
12732 | continue; | |
12733 | indx = elf_section_data (s)->this_idx; | |
c152c796 AM |
12734 | BFD_ASSERT (indx > 0); |
12735 | sym.st_shndx = indx; | |
c0d5a53d | 12736 | if (! check_dynsym (abfd, &sym)) |
496afd17 L |
12737 | { |
12738 | ret = FALSE; | |
12739 | goto return_local_hash_table; | |
12740 | } | |
c152c796 AM |
12741 | sym.st_value = s->vma; |
12742 | dest = dynsym + dynindx * bed->s->sizeof_sym; | |
12743 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); | |
12744 | } | |
c152c796 AM |
12745 | } |
12746 | ||
12747 | /* Write out the local dynsyms. */ | |
64f52338 | 12748 | if (htab->dynlocal) |
c152c796 AM |
12749 | { |
12750 | struct elf_link_local_dynamic_entry *e; | |
64f52338 | 12751 | for (e = htab->dynlocal; e ; e = e->next) |
c152c796 AM |
12752 | { |
12753 | asection *s; | |
12754 | bfd_byte *dest; | |
12755 | ||
935bd1e0 | 12756 | /* Copy the internal symbol and turn off visibility. |
c152c796 AM |
12757 | Note that we saved a word of storage and overwrote |
12758 | the original st_name with the dynstr_index. */ | |
12759 | sym = e->isym; | |
935bd1e0 | 12760 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); |
4d68fd75 | 12761 | sym.st_shndx = SHN_UNDEF; |
c152c796 | 12762 | |
cb33740c AM |
12763 | s = bfd_section_from_elf_index (e->input_bfd, |
12764 | e->isym.st_shndx); | |
4d68fd75 AM |
12765 | if (s != NULL |
12766 | && s->output_section != NULL | |
12767 | && elf_section_data (s->output_section) != NULL) | |
c152c796 | 12768 | { |
c152c796 AM |
12769 | sym.st_shndx = |
12770 | elf_section_data (s->output_section)->this_idx; | |
c0d5a53d | 12771 | if (! check_dynsym (abfd, &sym)) |
496afd17 L |
12772 | { |
12773 | ret = FALSE; | |
12774 | goto return_local_hash_table; | |
12775 | } | |
c152c796 AM |
12776 | sym.st_value = (s->output_section->vma |
12777 | + s->output_offset | |
12778 | + e->isym.st_value); | |
12779 | } | |
12780 | ||
c152c796 AM |
12781 | dest = dynsym + e->dynindx * bed->s->sizeof_sym; |
12782 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); | |
12783 | } | |
12784 | } | |
c152c796 AM |
12785 | } |
12786 | ||
12787 | /* We get the global symbols from the hash table. */ | |
12788 | eoinfo.failed = FALSE; | |
12789 | eoinfo.localsyms = FALSE; | |
8b127cbc | 12790 | eoinfo.flinfo = &flinfo; |
7686d77d | 12791 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 | 12792 | if (eoinfo.failed) |
496afd17 L |
12793 | { |
12794 | ret = FALSE; | |
12795 | goto return_local_hash_table; | |
12796 | } | |
c152c796 AM |
12797 | |
12798 | /* If backend needs to output some symbols not present in the hash | |
12799 | table, do it now. */ | |
8539e4e8 AM |
12800 | if (bed->elf_backend_output_arch_syms |
12801 | && (info->strip != strip_all || emit_relocs)) | |
c152c796 | 12802 | { |
6e0b88f1 | 12803 | typedef int (*out_sym_func) |
c152c796 AM |
12804 | (void *, const char *, Elf_Internal_Sym *, asection *, |
12805 | struct elf_link_hash_entry *); | |
12806 | ||
12807 | if (! ((*bed->elf_backend_output_arch_syms) | |
ef10c3ac L |
12808 | (abfd, info, &flinfo, |
12809 | (out_sym_func) elf_link_output_symstrtab))) | |
496afd17 L |
12810 | { |
12811 | ret = FALSE; | |
12812 | goto return_local_hash_table; | |
12813 | } | |
c152c796 AM |
12814 | } |
12815 | ||
ef10c3ac L |
12816 | /* Finalize the .strtab section. */ |
12817 | _bfd_elf_strtab_finalize (flinfo.symstrtab); | |
12818 | ||
12819 | /* Swap out the .strtab section. */ | |
12820 | if (!elf_link_swap_symbols_out (&flinfo)) | |
496afd17 L |
12821 | { |
12822 | ret = FALSE; | |
12823 | goto return_local_hash_table; | |
12824 | } | |
c152c796 AM |
12825 | |
12826 | /* Now we know the size of the symtab section. */ | |
c152c796 AM |
12827 | if (bfd_get_symcount (abfd) > 0) |
12828 | { | |
ee3b52e9 L |
12829 | /* Finish up and write out the symbol string table (.strtab) |
12830 | section. */ | |
ad32986f | 12831 | Elf_Internal_Shdr *symstrtab_hdr = NULL; |
8539e4e8 AM |
12832 | file_ptr off = symtab_hdr->sh_offset + symtab_hdr->sh_size; |
12833 | ||
ad32986f | 12834 | if (elf_symtab_shndx_list (abfd)) |
8539e4e8 | 12835 | { |
ad32986f | 12836 | symtab_shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; |
8539e4e8 | 12837 | |
ad32986f NC |
12838 | if (symtab_shndx_hdr != NULL && symtab_shndx_hdr->sh_name != 0) |
12839 | { | |
12840 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
12841 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
12842 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
12843 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
12844 | symtab_shndx_hdr->sh_size = amt; | |
8539e4e8 | 12845 | |
ad32986f NC |
12846 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, |
12847 | off, TRUE); | |
12848 | ||
12849 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
12850 | || (bfd_bwrite (flinfo.symshndxbuf, amt, abfd) != amt)) | |
496afd17 L |
12851 | { |
12852 | ret = FALSE; | |
12853 | goto return_local_hash_table; | |
12854 | } | |
ad32986f | 12855 | } |
8539e4e8 | 12856 | } |
ee3b52e9 L |
12857 | |
12858 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
12859 | /* sh_name was set in prep_headers. */ | |
12860 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
84865015 | 12861 | symstrtab_hdr->sh_flags = bed->elf_strtab_flags; |
ee3b52e9 | 12862 | symstrtab_hdr->sh_addr = 0; |
ef10c3ac | 12863 | symstrtab_hdr->sh_size = _bfd_elf_strtab_size (flinfo.symstrtab); |
ee3b52e9 L |
12864 | symstrtab_hdr->sh_entsize = 0; |
12865 | symstrtab_hdr->sh_link = 0; | |
12866 | symstrtab_hdr->sh_info = 0; | |
12867 | /* sh_offset is set just below. */ | |
12868 | symstrtab_hdr->sh_addralign = 1; | |
12869 | ||
12870 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, | |
12871 | off, TRUE); | |
12872 | elf_next_file_pos (abfd) = off; | |
12873 | ||
c152c796 | 12874 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 |
ef10c3ac | 12875 | || ! _bfd_elf_strtab_emit (abfd, flinfo.symstrtab)) |
496afd17 L |
12876 | { |
12877 | ret = FALSE; | |
12878 | goto return_local_hash_table; | |
12879 | } | |
c152c796 AM |
12880 | } |
12881 | ||
76359541 TP |
12882 | if (info->out_implib_bfd && !elf_output_implib (abfd, info)) |
12883 | { | |
871b3ab2 | 12884 | _bfd_error_handler (_("%pB: failed to generate import library"), |
4eca0228 | 12885 | info->out_implib_bfd); |
496afd17 L |
12886 | ret = FALSE; |
12887 | goto return_local_hash_table; | |
76359541 TP |
12888 | } |
12889 | ||
c152c796 AM |
12890 | /* Adjust the relocs to have the correct symbol indices. */ |
12891 | for (o = abfd->sections; o != NULL; o = o->next) | |
12892 | { | |
d4730f92 | 12893 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
28dbcedc | 12894 | bfd_boolean sort; |
10bbbc1d | 12895 | |
c152c796 AM |
12896 | if ((o->flags & SEC_RELOC) == 0) |
12897 | continue; | |
12898 | ||
28dbcedc | 12899 | sort = bed->sort_relocs_p == NULL || (*bed->sort_relocs_p) (o); |
bca6d0e3 | 12900 | if (esdo->rel.hdr != NULL |
10bbbc1d | 12901 | && !elf_link_adjust_relocs (abfd, o, &esdo->rel, sort, info)) |
496afd17 L |
12902 | { |
12903 | ret = FALSE; | |
12904 | goto return_local_hash_table; | |
12905 | } | |
bca6d0e3 | 12906 | if (esdo->rela.hdr != NULL |
10bbbc1d | 12907 | && !elf_link_adjust_relocs (abfd, o, &esdo->rela, sort, info)) |
496afd17 L |
12908 | { |
12909 | ret = FALSE; | |
12910 | goto return_local_hash_table; | |
12911 | } | |
c152c796 AM |
12912 | |
12913 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
12914 | trying to swap the relocs out itself. */ | |
12915 | o->reloc_count = 0; | |
12916 | } | |
12917 | ||
12918 | if (dynamic && info->combreloc && dynobj != NULL) | |
12919 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
12920 | ||
12921 | /* If we are linking against a dynamic object, or generating a | |
12922 | shared library, finish up the dynamic linking information. */ | |
12923 | if (dynamic) | |
12924 | { | |
12925 | bfd_byte *dyncon, *dynconend; | |
12926 | ||
12927 | /* Fix up .dynamic entries. */ | |
3d4d4302 | 12928 | o = bfd_get_linker_section (dynobj, ".dynamic"); |
c152c796 AM |
12929 | BFD_ASSERT (o != NULL); |
12930 | ||
12931 | dyncon = o->contents; | |
eea6121a | 12932 | dynconend = o->contents + o->size; |
c152c796 AM |
12933 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) |
12934 | { | |
12935 | Elf_Internal_Dyn dyn; | |
12936 | const char *name; | |
12937 | unsigned int type; | |
64487780 AM |
12938 | bfd_size_type sh_size; |
12939 | bfd_vma sh_addr; | |
c152c796 AM |
12940 | |
12941 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
12942 | ||
12943 | switch (dyn.d_tag) | |
12944 | { | |
12945 | default: | |
12946 | continue; | |
12947 | case DT_NULL: | |
12948 | if (relativecount > 0 && dyncon + bed->s->sizeof_dyn < dynconend) | |
12949 | { | |
12950 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
12951 | { | |
12952 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
12953 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
12954 | default: continue; | |
12955 | } | |
12956 | dyn.d_un.d_val = relativecount; | |
12957 | relativecount = 0; | |
12958 | break; | |
12959 | } | |
12960 | continue; | |
12961 | ||
12962 | case DT_INIT: | |
12963 | name = info->init_function; | |
12964 | goto get_sym; | |
12965 | case DT_FINI: | |
12966 | name = info->fini_function; | |
12967 | get_sym: | |
12968 | { | |
12969 | struct elf_link_hash_entry *h; | |
12970 | ||
64f52338 | 12971 | h = elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE); |
c152c796 AM |
12972 | if (h != NULL |
12973 | && (h->root.type == bfd_link_hash_defined | |
12974 | || h->root.type == bfd_link_hash_defweak)) | |
12975 | { | |
bef26483 | 12976 | dyn.d_un.d_ptr = h->root.u.def.value; |
c152c796 AM |
12977 | o = h->root.u.def.section; |
12978 | if (o->output_section != NULL) | |
bef26483 | 12979 | dyn.d_un.d_ptr += (o->output_section->vma |
c152c796 AM |
12980 | + o->output_offset); |
12981 | else | |
12982 | { | |
12983 | /* The symbol is imported from another shared | |
12984 | library and does not apply to this one. */ | |
bef26483 | 12985 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
12986 | } |
12987 | break; | |
12988 | } | |
12989 | } | |
12990 | continue; | |
12991 | ||
12992 | case DT_PREINIT_ARRAYSZ: | |
12993 | name = ".preinit_array"; | |
4ade44b7 | 12994 | goto get_out_size; |
c152c796 AM |
12995 | case DT_INIT_ARRAYSZ: |
12996 | name = ".init_array"; | |
4ade44b7 | 12997 | goto get_out_size; |
c152c796 AM |
12998 | case DT_FINI_ARRAYSZ: |
12999 | name = ".fini_array"; | |
4ade44b7 | 13000 | get_out_size: |
c152c796 AM |
13001 | o = bfd_get_section_by_name (abfd, name); |
13002 | if (o == NULL) | |
13003 | { | |
4eca0228 | 13004 | _bfd_error_handler |
4ade44b7 | 13005 | (_("could not find section %s"), name); |
c152c796 AM |
13006 | goto error_return; |
13007 | } | |
eea6121a | 13008 | if (o->size == 0) |
4eca0228 | 13009 | _bfd_error_handler |
c152c796 | 13010 | (_("warning: %s section has zero size"), name); |
eea6121a | 13011 | dyn.d_un.d_val = o->size; |
c152c796 AM |
13012 | break; |
13013 | ||
13014 | case DT_PREINIT_ARRAY: | |
13015 | name = ".preinit_array"; | |
4ade44b7 | 13016 | goto get_out_vma; |
c152c796 AM |
13017 | case DT_INIT_ARRAY: |
13018 | name = ".init_array"; | |
4ade44b7 | 13019 | goto get_out_vma; |
c152c796 AM |
13020 | case DT_FINI_ARRAY: |
13021 | name = ".fini_array"; | |
4ade44b7 AM |
13022 | get_out_vma: |
13023 | o = bfd_get_section_by_name (abfd, name); | |
13024 | goto do_vma; | |
c152c796 AM |
13025 | |
13026 | case DT_HASH: | |
13027 | name = ".hash"; | |
13028 | goto get_vma; | |
fdc90cb4 JJ |
13029 | case DT_GNU_HASH: |
13030 | name = ".gnu.hash"; | |
13031 | goto get_vma; | |
c152c796 AM |
13032 | case DT_STRTAB: |
13033 | name = ".dynstr"; | |
13034 | goto get_vma; | |
13035 | case DT_SYMTAB: | |
13036 | name = ".dynsym"; | |
13037 | goto get_vma; | |
13038 | case DT_VERDEF: | |
13039 | name = ".gnu.version_d"; | |
13040 | goto get_vma; | |
13041 | case DT_VERNEED: | |
13042 | name = ".gnu.version_r"; | |
13043 | goto get_vma; | |
13044 | case DT_VERSYM: | |
13045 | name = ".gnu.version"; | |
13046 | get_vma: | |
4ade44b7 AM |
13047 | o = bfd_get_linker_section (dynobj, name); |
13048 | do_vma: | |
b3293efa | 13049 | if (o == NULL || bfd_is_abs_section (o->output_section)) |
c152c796 | 13050 | { |
4eca0228 | 13051 | _bfd_error_handler |
4ade44b7 | 13052 | (_("could not find section %s"), name); |
c152c796 AM |
13053 | goto error_return; |
13054 | } | |
894891db NC |
13055 | if (elf_section_data (o->output_section)->this_hdr.sh_type == SHT_NOTE) |
13056 | { | |
4eca0228 | 13057 | _bfd_error_handler |
894891db NC |
13058 | (_("warning: section '%s' is being made into a note"), name); |
13059 | bfd_set_error (bfd_error_nonrepresentable_section); | |
13060 | goto error_return; | |
13061 | } | |
4ade44b7 | 13062 | dyn.d_un.d_ptr = o->output_section->vma + o->output_offset; |
c152c796 AM |
13063 | break; |
13064 | ||
13065 | case DT_REL: | |
13066 | case DT_RELA: | |
13067 | case DT_RELSZ: | |
13068 | case DT_RELASZ: | |
13069 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
13070 | type = SHT_REL; | |
13071 | else | |
13072 | type = SHT_RELA; | |
64487780 AM |
13073 | sh_size = 0; |
13074 | sh_addr = 0; | |
c152c796 AM |
13075 | for (i = 1; i < elf_numsections (abfd); i++) |
13076 | { | |
13077 | Elf_Internal_Shdr *hdr; | |
13078 | ||
13079 | hdr = elf_elfsections (abfd)[i]; | |
13080 | if (hdr->sh_type == type | |
13081 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
13082 | { | |
64487780 AM |
13083 | sh_size += hdr->sh_size; |
13084 | if (sh_addr == 0 | |
13085 | || sh_addr > hdr->sh_addr) | |
13086 | sh_addr = hdr->sh_addr; | |
c152c796 AM |
13087 | } |
13088 | } | |
64487780 | 13089 | |
64f52338 AM |
13090 | if (bed->dtrel_excludes_plt && htab->srelplt != NULL) |
13091 | { | |
66631823 CE |
13092 | unsigned int opb = bfd_octets_per_byte (abfd, o); |
13093 | ||
64f52338 AM |
13094 | /* Don't count procedure linkage table relocs in the |
13095 | overall reloc count. */ | |
64487780 AM |
13096 | sh_size -= htab->srelplt->size; |
13097 | if (sh_size == 0) | |
13098 | /* If the size is zero, make the address zero too. | |
13099 | This is to avoid a glibc bug. If the backend | |
13100 | emits DT_RELA/DT_RELASZ even when DT_RELASZ is | |
13101 | zero, then we'll put DT_RELA at the end of | |
13102 | DT_JMPREL. glibc will interpret the end of | |
13103 | DT_RELA matching the end of DT_JMPREL as the | |
13104 | case where DT_RELA includes DT_JMPREL, and for | |
13105 | LD_BIND_NOW will decide that processing DT_RELA | |
13106 | will process the PLT relocs too. Net result: | |
13107 | No PLT relocs applied. */ | |
13108 | sh_addr = 0; | |
13109 | ||
64f52338 AM |
13110 | /* If .rela.plt is the first .rela section, exclude |
13111 | it from DT_RELA. */ | |
64487780 | 13112 | else if (sh_addr == (htab->srelplt->output_section->vma |
66631823 | 13113 | + htab->srelplt->output_offset) * opb) |
64487780 | 13114 | sh_addr += htab->srelplt->size; |
64f52338 | 13115 | } |
64487780 AM |
13116 | |
13117 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
13118 | dyn.d_un.d_val = sh_size; | |
13119 | else | |
13120 | dyn.d_un.d_ptr = sh_addr; | |
c152c796 AM |
13121 | break; |
13122 | } | |
13123 | bed->s->swap_dyn_out (dynobj, &dyn, dyncon); | |
13124 | } | |
13125 | } | |
13126 | ||
13127 | /* If we have created any dynamic sections, then output them. */ | |
13128 | if (dynobj != NULL) | |
13129 | { | |
13130 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
13131 | goto error_return; | |
13132 | ||
943284cc | 13133 | /* Check for DT_TEXTREL (late, in case the backend removes it). */ |
a6dbf402 | 13134 | if (bfd_link_textrel_check (info) |
3d4d4302 | 13135 | && (o = bfd_get_linker_section (dynobj, ".dynamic")) != NULL) |
943284cc DJ |
13136 | { |
13137 | bfd_byte *dyncon, *dynconend; | |
13138 | ||
943284cc DJ |
13139 | dyncon = o->contents; |
13140 | dynconend = o->contents + o->size; | |
13141 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) | |
13142 | { | |
13143 | Elf_Internal_Dyn dyn; | |
13144 | ||
13145 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
13146 | ||
13147 | if (dyn.d_tag == DT_TEXTREL) | |
13148 | { | |
a6dbf402 | 13149 | if (info->textrel_check == textrel_check_error) |
c192a133 | 13150 | info->callbacks->einfo |
9793eb77 | 13151 | (_("%P%X: read-only segment has dynamic relocations\n")); |
a6dbf402 L |
13152 | else if (bfd_link_dll (info)) |
13153 | info->callbacks->einfo | |
13154 | (_("%P: warning: creating DT_TEXTREL in a shared object\n")); | |
c192a133 AM |
13155 | else |
13156 | info->callbacks->einfo | |
a6dbf402 | 13157 | (_("%P: warning: creating DT_TEXTREL in a PIE\n")); |
943284cc DJ |
13158 | break; |
13159 | } | |
13160 | } | |
13161 | } | |
13162 | ||
c152c796 AM |
13163 | for (o = dynobj->sections; o != NULL; o = o->next) |
13164 | { | |
13165 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
eea6121a | 13166 | || o->size == 0 |
c152c796 AM |
13167 | || o->output_section == bfd_abs_section_ptr) |
13168 | continue; | |
13169 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
13170 | { | |
13171 | /* At this point, we are only interested in sections | |
13172 | created by _bfd_elf_link_create_dynamic_sections. */ | |
13173 | continue; | |
13174 | } | |
64f52338 | 13175 | if (htab->stab_info.stabstr == o) |
3722b82f | 13176 | continue; |
64f52338 | 13177 | if (htab->eh_info.hdr_sec == o) |
eea6121a | 13178 | continue; |
3d4d4302 | 13179 | if (strcmp (o->name, ".dynstr") != 0) |
c152c796 | 13180 | { |
bb294208 AM |
13181 | bfd_size_type octets = ((file_ptr) o->output_offset |
13182 | * bfd_octets_per_byte (abfd, o)); | |
13183 | if (!bfd_set_section_contents (abfd, o->output_section, | |
13184 | o->contents, octets, o->size)) | |
c152c796 AM |
13185 | goto error_return; |
13186 | } | |
13187 | else | |
13188 | { | |
13189 | /* The contents of the .dynstr section are actually in a | |
13190 | stringtab. */ | |
8539e4e8 AM |
13191 | file_ptr off; |
13192 | ||
c152c796 AM |
13193 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
13194 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
64f52338 | 13195 | || !_bfd_elf_strtab_emit (abfd, htab->dynstr)) |
c152c796 AM |
13196 | goto error_return; |
13197 | } | |
13198 | } | |
13199 | } | |
13200 | ||
7bdf4127 | 13201 | if (!info->resolve_section_groups) |
c152c796 AM |
13202 | { |
13203 | bfd_boolean failed = FALSE; | |
13204 | ||
7bdf4127 | 13205 | BFD_ASSERT (bfd_link_relocatable (info)); |
c152c796 AM |
13206 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); |
13207 | if (failed) | |
13208 | goto error_return; | |
13209 | } | |
13210 | ||
13211 | /* If we have optimized stabs strings, output them. */ | |
64f52338 | 13212 | if (htab->stab_info.stabstr != NULL) |
c152c796 | 13213 | { |
64f52338 | 13214 | if (!_bfd_write_stab_strings (abfd, &htab->stab_info)) |
c152c796 AM |
13215 | goto error_return; |
13216 | } | |
13217 | ||
9f7c3e5e AM |
13218 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
13219 | goto error_return; | |
c152c796 | 13220 | |
1ff6de03 NA |
13221 | if (info->callbacks->emit_ctf) |
13222 | info->callbacks->emit_ctf (); | |
13223 | ||
9f7c3e5e | 13224 | elf_final_link_free (abfd, &flinfo); |
c152c796 | 13225 | |
104d59d1 JM |
13226 | if (attr_section) |
13227 | { | |
a50b1753 | 13228 | bfd_byte *contents = (bfd_byte *) bfd_malloc (attr_size); |
104d59d1 | 13229 | if (contents == NULL) |
496afd17 L |
13230 | { |
13231 | /* Bail out and fail. */ | |
13232 | ret = FALSE; | |
13233 | goto return_local_hash_table; | |
13234 | } | |
104d59d1 JM |
13235 | bfd_elf_set_obj_attr_contents (abfd, contents, attr_size); |
13236 | bfd_set_section_contents (abfd, attr_section, contents, 0, attr_size); | |
13237 | free (contents); | |
13238 | } | |
13239 | ||
496afd17 L |
13240 | return_local_hash_table: |
13241 | if (info->unique_symbol) | |
13242 | bfd_hash_table_free (&flinfo.local_hash_table); | |
13243 | return ret; | |
c152c796 AM |
13244 | |
13245 | error_return: | |
9f7c3e5e | 13246 | elf_final_link_free (abfd, &flinfo); |
496afd17 L |
13247 | ret = FALSE; |
13248 | goto return_local_hash_table; | |
c152c796 AM |
13249 | } |
13250 | \f | |
5241d853 RS |
13251 | /* Initialize COOKIE for input bfd ABFD. */ |
13252 | ||
13253 | static bfd_boolean | |
13254 | init_reloc_cookie (struct elf_reloc_cookie *cookie, | |
13255 | struct bfd_link_info *info, bfd *abfd) | |
13256 | { | |
13257 | Elf_Internal_Shdr *symtab_hdr; | |
13258 | const struct elf_backend_data *bed; | |
13259 | ||
13260 | bed = get_elf_backend_data (abfd); | |
13261 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
13262 | ||
13263 | cookie->abfd = abfd; | |
13264 | cookie->sym_hashes = elf_sym_hashes (abfd); | |
13265 | cookie->bad_symtab = elf_bad_symtab (abfd); | |
13266 | if (cookie->bad_symtab) | |
13267 | { | |
13268 | cookie->locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
13269 | cookie->extsymoff = 0; | |
13270 | } | |
13271 | else | |
13272 | { | |
13273 | cookie->locsymcount = symtab_hdr->sh_info; | |
13274 | cookie->extsymoff = symtab_hdr->sh_info; | |
13275 | } | |
13276 | ||
13277 | if (bed->s->arch_size == 32) | |
13278 | cookie->r_sym_shift = 8; | |
13279 | else | |
13280 | cookie->r_sym_shift = 32; | |
13281 | ||
13282 | cookie->locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
13283 | if (cookie->locsyms == NULL && cookie->locsymcount != 0) | |
13284 | { | |
13285 | cookie->locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
13286 | cookie->locsymcount, 0, | |
13287 | NULL, NULL, NULL); | |
13288 | if (cookie->locsyms == NULL) | |
13289 | { | |
13290 | info->callbacks->einfo (_("%P%X: can not read symbols: %E\n")); | |
13291 | return FALSE; | |
13292 | } | |
13293 | if (info->keep_memory) | |
13294 | symtab_hdr->contents = (bfd_byte *) cookie->locsyms; | |
13295 | } | |
13296 | return TRUE; | |
13297 | } | |
13298 | ||
13299 | /* Free the memory allocated by init_reloc_cookie, if appropriate. */ | |
13300 | ||
13301 | static void | |
13302 | fini_reloc_cookie (struct elf_reloc_cookie *cookie, bfd *abfd) | |
13303 | { | |
13304 | Elf_Internal_Shdr *symtab_hdr; | |
13305 | ||
13306 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
c9594989 | 13307 | if (symtab_hdr->contents != (unsigned char *) cookie->locsyms) |
5241d853 RS |
13308 | free (cookie->locsyms); |
13309 | } | |
13310 | ||
13311 | /* Initialize the relocation information in COOKIE for input section SEC | |
13312 | of input bfd ABFD. */ | |
13313 | ||
13314 | static bfd_boolean | |
13315 | init_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
13316 | struct bfd_link_info *info, bfd *abfd, | |
13317 | asection *sec) | |
13318 | { | |
5241d853 RS |
13319 | if (sec->reloc_count == 0) |
13320 | { | |
13321 | cookie->rels = NULL; | |
13322 | cookie->relend = NULL; | |
13323 | } | |
13324 | else | |
13325 | { | |
5241d853 RS |
13326 | cookie->rels = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, |
13327 | info->keep_memory); | |
13328 | if (cookie->rels == NULL) | |
13329 | return FALSE; | |
13330 | cookie->rel = cookie->rels; | |
056bafd4 | 13331 | cookie->relend = cookie->rels + sec->reloc_count; |
5241d853 RS |
13332 | } |
13333 | cookie->rel = cookie->rels; | |
13334 | return TRUE; | |
13335 | } | |
13336 | ||
13337 | /* Free the memory allocated by init_reloc_cookie_rels, | |
13338 | if appropriate. */ | |
13339 | ||
13340 | static void | |
13341 | fini_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
13342 | asection *sec) | |
13343 | { | |
c9594989 | 13344 | if (elf_section_data (sec)->relocs != cookie->rels) |
5241d853 RS |
13345 | free (cookie->rels); |
13346 | } | |
13347 | ||
13348 | /* Initialize the whole of COOKIE for input section SEC. */ | |
13349 | ||
13350 | static bfd_boolean | |
13351 | init_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
13352 | struct bfd_link_info *info, | |
13353 | asection *sec) | |
13354 | { | |
13355 | if (!init_reloc_cookie (cookie, info, sec->owner)) | |
13356 | goto error1; | |
13357 | if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec)) | |
13358 | goto error2; | |
13359 | return TRUE; | |
13360 | ||
13361 | error2: | |
13362 | fini_reloc_cookie (cookie, sec->owner); | |
13363 | error1: | |
13364 | return FALSE; | |
13365 | } | |
13366 | ||
13367 | /* Free the memory allocated by init_reloc_cookie_for_section, | |
13368 | if appropriate. */ | |
13369 | ||
13370 | static void | |
13371 | fini_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
13372 | asection *sec) | |
13373 | { | |
13374 | fini_reloc_cookie_rels (cookie, sec); | |
13375 | fini_reloc_cookie (cookie, sec->owner); | |
13376 | } | |
13377 | \f | |
c152c796 AM |
13378 | /* Garbage collect unused sections. */ |
13379 | ||
07adf181 AM |
13380 | /* Default gc_mark_hook. */ |
13381 | ||
13382 | asection * | |
13383 | _bfd_elf_gc_mark_hook (asection *sec, | |
13384 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
13385 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, | |
13386 | struct elf_link_hash_entry *h, | |
13387 | Elf_Internal_Sym *sym) | |
13388 | { | |
13389 | if (h != NULL) | |
13390 | { | |
13391 | switch (h->root.type) | |
13392 | { | |
13393 | case bfd_link_hash_defined: | |
13394 | case bfd_link_hash_defweak: | |
13395 | return h->root.u.def.section; | |
13396 | ||
13397 | case bfd_link_hash_common: | |
13398 | return h->root.u.c.p->section; | |
13399 | ||
13400 | default: | |
13401 | break; | |
13402 | } | |
13403 | } | |
13404 | else | |
13405 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
13406 | ||
13407 | return NULL; | |
13408 | } | |
13409 | ||
9e223787 | 13410 | /* Return the debug definition section. */ |
b7c871ed L |
13411 | |
13412 | static asection * | |
13413 | elf_gc_mark_debug_section (asection *sec ATTRIBUTE_UNUSED, | |
13414 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
13415 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, | |
13416 | struct elf_link_hash_entry *h, | |
9e223787 | 13417 | Elf_Internal_Sym *sym) |
b7c871ed | 13418 | { |
9e223787 L |
13419 | if (h != NULL) |
13420 | { | |
13421 | /* Return the global debug definition section. */ | |
13422 | if ((h->root.type == bfd_link_hash_defined | |
13423 | || h->root.type == bfd_link_hash_defweak) | |
13424 | && (h->root.u.def.section->flags & SEC_DEBUGGING) != 0) | |
13425 | return h->root.u.def.section; | |
13426 | } | |
13427 | else | |
13428 | { | |
13429 | /* Return the local debug definition section. */ | |
13430 | asection *isec = bfd_section_from_elf_index (sec->owner, | |
13431 | sym->st_shndx); | |
13432 | if ((isec->flags & SEC_DEBUGGING) != 0) | |
13433 | return isec; | |
13434 | } | |
b7c871ed L |
13435 | |
13436 | return NULL; | |
13437 | } | |
13438 | ||
5241d853 RS |
13439 | /* COOKIE->rel describes a relocation against section SEC, which is |
13440 | a section we've decided to keep. Return the section that contains | |
13441 | the relocation symbol, or NULL if no section contains it. */ | |
13442 | ||
13443 | asection * | |
13444 | _bfd_elf_gc_mark_rsec (struct bfd_link_info *info, asection *sec, | |
13445 | elf_gc_mark_hook_fn gc_mark_hook, | |
1cce69b9 AM |
13446 | struct elf_reloc_cookie *cookie, |
13447 | bfd_boolean *start_stop) | |
5241d853 RS |
13448 | { |
13449 | unsigned long r_symndx; | |
3024a17a | 13450 | struct elf_link_hash_entry *h, *hw; |
5241d853 RS |
13451 | |
13452 | r_symndx = cookie->rel->r_info >> cookie->r_sym_shift; | |
cf35638d | 13453 | if (r_symndx == STN_UNDEF) |
5241d853 RS |
13454 | return NULL; |
13455 | ||
13456 | if (r_symndx >= cookie->locsymcount | |
13457 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
13458 | { | |
13459 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; | |
263ddf68 L |
13460 | if (h == NULL) |
13461 | { | |
871b3ab2 | 13462 | info->callbacks->einfo (_("%F%P: corrupt input: %pB\n"), |
263ddf68 L |
13463 | sec->owner); |
13464 | return NULL; | |
13465 | } | |
5241d853 RS |
13466 | while (h->root.type == bfd_link_hash_indirect |
13467 | || h->root.type == bfd_link_hash_warning) | |
13468 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1d5316ab | 13469 | h->mark = 1; |
3024a17a AM |
13470 | /* Keep all aliases of the symbol too. If an object symbol |
13471 | needs to be copied into .dynbss then all of its aliases | |
13472 | should be present as dynamic symbols, not just the one used | |
13473 | on the copy relocation. */ | |
13474 | hw = h; | |
13475 | while (hw->is_weakalias) | |
13476 | { | |
13477 | hw = hw->u.alias; | |
13478 | hw->mark = 1; | |
13479 | } | |
1cce69b9 | 13480 | |
a6a4679f | 13481 | if (start_stop != NULL) |
1cce69b9 | 13482 | { |
7dba9362 AM |
13483 | /* To work around a glibc bug, mark XXX input sections |
13484 | when there is a reference to __start_XXX or __stop_XXX | |
13485 | symbols. */ | |
cbd0eecf | 13486 | if (h->start_stop) |
1cce69b9 | 13487 | { |
cbd0eecf | 13488 | asection *s = h->u2.start_stop_section; |
a6a4679f AM |
13489 | *start_stop = !s->gc_mark; |
13490 | return s; | |
1cce69b9 AM |
13491 | } |
13492 | } | |
13493 | ||
5241d853 RS |
13494 | return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL); |
13495 | } | |
13496 | ||
13497 | return (*gc_mark_hook) (sec, info, cookie->rel, NULL, | |
13498 | &cookie->locsyms[r_symndx]); | |
13499 | } | |
13500 | ||
13501 | /* COOKIE->rel describes a relocation against section SEC, which is | |
13502 | a section we've decided to keep. Mark the section that contains | |
9d0a14d3 | 13503 | the relocation symbol. */ |
5241d853 RS |
13504 | |
13505 | bfd_boolean | |
13506 | _bfd_elf_gc_mark_reloc (struct bfd_link_info *info, | |
13507 | asection *sec, | |
13508 | elf_gc_mark_hook_fn gc_mark_hook, | |
9d0a14d3 | 13509 | struct elf_reloc_cookie *cookie) |
5241d853 RS |
13510 | { |
13511 | asection *rsec; | |
1cce69b9 | 13512 | bfd_boolean start_stop = FALSE; |
5241d853 | 13513 | |
1cce69b9 AM |
13514 | rsec = _bfd_elf_gc_mark_rsec (info, sec, gc_mark_hook, cookie, &start_stop); |
13515 | while (rsec != NULL) | |
5241d853 | 13516 | { |
1cce69b9 AM |
13517 | if (!rsec->gc_mark) |
13518 | { | |
13519 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour | |
13520 | || (rsec->owner->flags & DYNAMIC) != 0) | |
13521 | rsec->gc_mark = 1; | |
13522 | else if (!_bfd_elf_gc_mark (info, rsec, gc_mark_hook)) | |
13523 | return FALSE; | |
13524 | } | |
13525 | if (!start_stop) | |
13526 | break; | |
199af150 | 13527 | rsec = bfd_get_next_section_by_name (rsec->owner, rsec); |
5241d853 RS |
13528 | } |
13529 | return TRUE; | |
13530 | } | |
13531 | ||
07adf181 AM |
13532 | /* The mark phase of garbage collection. For a given section, mark |
13533 | it and any sections in this section's group, and all the sections | |
13534 | which define symbols to which it refers. */ | |
13535 | ||
ccfa59ea AM |
13536 | bfd_boolean |
13537 | _bfd_elf_gc_mark (struct bfd_link_info *info, | |
13538 | asection *sec, | |
6a5bb875 | 13539 | elf_gc_mark_hook_fn gc_mark_hook) |
c152c796 AM |
13540 | { |
13541 | bfd_boolean ret; | |
9d0a14d3 | 13542 | asection *group_sec, *eh_frame; |
c152c796 AM |
13543 | |
13544 | sec->gc_mark = 1; | |
13545 | ||
13546 | /* Mark all the sections in the group. */ | |
13547 | group_sec = elf_section_data (sec)->next_in_group; | |
13548 | if (group_sec && !group_sec->gc_mark) | |
ccfa59ea | 13549 | if (!_bfd_elf_gc_mark (info, group_sec, gc_mark_hook)) |
c152c796 AM |
13550 | return FALSE; |
13551 | ||
13552 | /* Look through the section relocs. */ | |
13553 | ret = TRUE; | |
9d0a14d3 RS |
13554 | eh_frame = elf_eh_frame_section (sec->owner); |
13555 | if ((sec->flags & SEC_RELOC) != 0 | |
13556 | && sec->reloc_count > 0 | |
13557 | && sec != eh_frame) | |
c152c796 | 13558 | { |
5241d853 | 13559 | struct elf_reloc_cookie cookie; |
c152c796 | 13560 | |
5241d853 RS |
13561 | if (!init_reloc_cookie_for_section (&cookie, info, sec)) |
13562 | ret = FALSE; | |
c152c796 | 13563 | else |
c152c796 | 13564 | { |
5241d853 | 13565 | for (; cookie.rel < cookie.relend; cookie.rel++) |
9d0a14d3 | 13566 | if (!_bfd_elf_gc_mark_reloc (info, sec, gc_mark_hook, &cookie)) |
5241d853 RS |
13567 | { |
13568 | ret = FALSE; | |
13569 | break; | |
13570 | } | |
13571 | fini_reloc_cookie_for_section (&cookie, sec); | |
c152c796 AM |
13572 | } |
13573 | } | |
9d0a14d3 RS |
13574 | |
13575 | if (ret && eh_frame && elf_fde_list (sec)) | |
13576 | { | |
13577 | struct elf_reloc_cookie cookie; | |
13578 | ||
13579 | if (!init_reloc_cookie_for_section (&cookie, info, eh_frame)) | |
13580 | ret = FALSE; | |
13581 | else | |
13582 | { | |
13583 | if (!_bfd_elf_gc_mark_fdes (info, sec, eh_frame, | |
13584 | gc_mark_hook, &cookie)) | |
13585 | ret = FALSE; | |
13586 | fini_reloc_cookie_for_section (&cookie, eh_frame); | |
13587 | } | |
13588 | } | |
13589 | ||
2f0c68f2 CM |
13590 | eh_frame = elf_section_eh_frame_entry (sec); |
13591 | if (ret && eh_frame && !eh_frame->gc_mark) | |
13592 | if (!_bfd_elf_gc_mark (info, eh_frame, gc_mark_hook)) | |
13593 | ret = FALSE; | |
13594 | ||
c152c796 AM |
13595 | return ret; |
13596 | } | |
13597 | ||
3c758495 TG |
13598 | /* Scan and mark sections in a special or debug section group. */ |
13599 | ||
13600 | static void | |
13601 | _bfd_elf_gc_mark_debug_special_section_group (asection *grp) | |
13602 | { | |
13603 | /* Point to first section of section group. */ | |
13604 | asection *ssec; | |
13605 | /* Used to iterate the section group. */ | |
13606 | asection *msec; | |
13607 | ||
13608 | bfd_boolean is_special_grp = TRUE; | |
13609 | bfd_boolean is_debug_grp = TRUE; | |
13610 | ||
13611 | /* First scan to see if group contains any section other than debug | |
13612 | and special section. */ | |
13613 | ssec = msec = elf_next_in_group (grp); | |
13614 | do | |
13615 | { | |
13616 | if ((msec->flags & SEC_DEBUGGING) == 0) | |
13617 | is_debug_grp = FALSE; | |
13618 | ||
13619 | if ((msec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) != 0) | |
13620 | is_special_grp = FALSE; | |
13621 | ||
13622 | msec = elf_next_in_group (msec); | |
13623 | } | |
13624 | while (msec != ssec); | |
13625 | ||
13626 | /* If this is a pure debug section group or pure special section group, | |
13627 | keep all sections in this group. */ | |
13628 | if (is_debug_grp || is_special_grp) | |
13629 | { | |
13630 | do | |
13631 | { | |
13632 | msec->gc_mark = 1; | |
13633 | msec = elf_next_in_group (msec); | |
13634 | } | |
13635 | while (msec != ssec); | |
13636 | } | |
13637 | } | |
13638 | ||
7f6ab9f8 AM |
13639 | /* Keep debug and special sections. */ |
13640 | ||
13641 | bfd_boolean | |
13642 | _bfd_elf_gc_mark_extra_sections (struct bfd_link_info *info, | |
b7d07216 | 13643 | elf_gc_mark_hook_fn mark_hook) |
7f6ab9f8 AM |
13644 | { |
13645 | bfd *ibfd; | |
13646 | ||
c72f2fb2 | 13647 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
7f6ab9f8 AM |
13648 | { |
13649 | asection *isec; | |
13650 | bfd_boolean some_kept; | |
b40bf0a2 | 13651 | bfd_boolean debug_frag_seen; |
b7c871ed | 13652 | bfd_boolean has_kept_debug_info; |
7f6ab9f8 AM |
13653 | |
13654 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
13655 | continue; | |
57963c05 AM |
13656 | isec = ibfd->sections; |
13657 | if (isec == NULL || isec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
13658 | continue; | |
7f6ab9f8 | 13659 | |
b40bf0a2 NC |
13660 | /* Ensure all linker created sections are kept, |
13661 | see if any other section is already marked, | |
13662 | and note if we have any fragmented debug sections. */ | |
b7c871ed | 13663 | debug_frag_seen = some_kept = has_kept_debug_info = FALSE; |
7f6ab9f8 AM |
13664 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
13665 | { | |
13666 | if ((isec->flags & SEC_LINKER_CREATED) != 0) | |
13667 | isec->gc_mark = 1; | |
eb026f09 AM |
13668 | else if (isec->gc_mark |
13669 | && (isec->flags & SEC_ALLOC) != 0 | |
13670 | && elf_section_type (isec) != SHT_NOTE) | |
7f6ab9f8 | 13671 | some_kept = TRUE; |
b7d07216 L |
13672 | else |
13673 | { | |
13674 | /* Since all sections, except for backend specific ones, | |
13675 | have been garbage collected, call mark_hook on this | |
13676 | section if any of its linked-to sections is marked. */ | |
13677 | asection *linked_to_sec = elf_linked_to_section (isec); | |
13678 | for (; linked_to_sec != NULL; | |
13679 | linked_to_sec = elf_linked_to_section (linked_to_sec)) | |
13680 | if (linked_to_sec->gc_mark) | |
13681 | { | |
13682 | if (!_bfd_elf_gc_mark (info, isec, mark_hook)) | |
13683 | return FALSE; | |
13684 | break; | |
13685 | } | |
13686 | } | |
b40bf0a2 | 13687 | |
535b785f | 13688 | if (!debug_frag_seen |
b40bf0a2 NC |
13689 | && (isec->flags & SEC_DEBUGGING) |
13690 | && CONST_STRNEQ (isec->name, ".debug_line.")) | |
13691 | debug_frag_seen = TRUE; | |
5242a0a0 L |
13692 | else if (strcmp (bfd_section_name (isec), |
13693 | "__patchable_function_entries") == 0 | |
13694 | && elf_linked_to_section (isec) == NULL) | |
13695 | info->callbacks->einfo (_("%F%P: %pB(%pA): error: " | |
13696 | "need linked-to section " | |
13697 | "for --gc-sections\n"), | |
13698 | isec->owner, isec); | |
7f6ab9f8 AM |
13699 | } |
13700 | ||
eb026f09 AM |
13701 | /* If no non-note alloc section in this file will be kept, then |
13702 | we can toss out the debug and special sections. */ | |
7f6ab9f8 AM |
13703 | if (!some_kept) |
13704 | continue; | |
13705 | ||
13706 | /* Keep debug and special sections like .comment when they are | |
3c758495 | 13707 | not part of a group. Also keep section groups that contain |
b7d07216 L |
13708 | just debug sections or special sections. NB: Sections with |
13709 | linked-to section has been handled above. */ | |
7f6ab9f8 | 13710 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
3c758495 TG |
13711 | { |
13712 | if ((isec->flags & SEC_GROUP) != 0) | |
13713 | _bfd_elf_gc_mark_debug_special_section_group (isec); | |
13714 | else if (((isec->flags & SEC_DEBUGGING) != 0 | |
13715 | || (isec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0) | |
b7d07216 L |
13716 | && elf_next_in_group (isec) == NULL |
13717 | && elf_linked_to_section (isec) == NULL) | |
3c758495 | 13718 | isec->gc_mark = 1; |
b7c871ed L |
13719 | if (isec->gc_mark && (isec->flags & SEC_DEBUGGING) != 0) |
13720 | has_kept_debug_info = TRUE; | |
3c758495 | 13721 | } |
b40bf0a2 | 13722 | |
b40bf0a2 NC |
13723 | /* Look for CODE sections which are going to be discarded, |
13724 | and find and discard any fragmented debug sections which | |
13725 | are associated with that code section. */ | |
b7c871ed L |
13726 | if (debug_frag_seen) |
13727 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) | |
13728 | if ((isec->flags & SEC_CODE) != 0 | |
13729 | && isec->gc_mark == 0) | |
13730 | { | |
13731 | unsigned int ilen; | |
13732 | asection *dsec; | |
b40bf0a2 | 13733 | |
b7c871ed | 13734 | ilen = strlen (isec->name); |
b40bf0a2 | 13735 | |
b7c871ed | 13736 | /* Association is determined by the name of the debug |
07d6d2b8 | 13737 | section containing the name of the code section as |
b7c871ed L |
13738 | a suffix. For example .debug_line.text.foo is a |
13739 | debug section associated with .text.foo. */ | |
13740 | for (dsec = ibfd->sections; dsec != NULL; dsec = dsec->next) | |
13741 | { | |
13742 | unsigned int dlen; | |
b40bf0a2 | 13743 | |
b7c871ed L |
13744 | if (dsec->gc_mark == 0 |
13745 | || (dsec->flags & SEC_DEBUGGING) == 0) | |
13746 | continue; | |
b40bf0a2 | 13747 | |
b7c871ed | 13748 | dlen = strlen (dsec->name); |
b40bf0a2 | 13749 | |
b7c871ed L |
13750 | if (dlen > ilen |
13751 | && strncmp (dsec->name + (dlen - ilen), | |
13752 | isec->name, ilen) == 0) | |
b40bf0a2 | 13753 | dsec->gc_mark = 0; |
b7c871ed | 13754 | } |
b40bf0a2 | 13755 | } |
b7c871ed L |
13756 | |
13757 | /* Mark debug sections referenced by kept debug sections. */ | |
13758 | if (has_kept_debug_info) | |
13759 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) | |
13760 | if (isec->gc_mark | |
13761 | && (isec->flags & SEC_DEBUGGING) != 0) | |
13762 | if (!_bfd_elf_gc_mark (info, isec, | |
13763 | elf_gc_mark_debug_section)) | |
13764 | return FALSE; | |
7f6ab9f8 AM |
13765 | } |
13766 | return TRUE; | |
13767 | } | |
13768 | ||
c152c796 | 13769 | static bfd_boolean |
ccabcbe5 | 13770 | elf_gc_sweep (bfd *abfd, struct bfd_link_info *info) |
c152c796 AM |
13771 | { |
13772 | bfd *sub; | |
ccabcbe5 | 13773 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
c152c796 | 13774 | |
c72f2fb2 | 13775 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
13776 | { |
13777 | asection *o; | |
13778 | ||
b19a8f85 | 13779 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
81742b83 | 13780 | || elf_object_id (sub) != elf_hash_table_id (elf_hash_table (info)) |
b19a8f85 | 13781 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) |
c152c796 | 13782 | continue; |
57963c05 AM |
13783 | o = sub->sections; |
13784 | if (o == NULL || o->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
13785 | continue; | |
c152c796 AM |
13786 | |
13787 | for (o = sub->sections; o != NULL; o = o->next) | |
13788 | { | |
a33dafc3 L |
13789 | /* When any section in a section group is kept, we keep all |
13790 | sections in the section group. If the first member of | |
13791 | the section group is excluded, we will also exclude the | |
13792 | group section. */ | |
13793 | if (o->flags & SEC_GROUP) | |
13794 | { | |
13795 | asection *first = elf_next_in_group (o); | |
13796 | o->gc_mark = first->gc_mark; | |
13797 | } | |
c152c796 | 13798 | |
1e7eae0d | 13799 | if (o->gc_mark) |
c152c796 AM |
13800 | continue; |
13801 | ||
13802 | /* Skip sweeping sections already excluded. */ | |
13803 | if (o->flags & SEC_EXCLUDE) | |
13804 | continue; | |
13805 | ||
13806 | /* Since this is early in the link process, it is simple | |
13807 | to remove a section from the output. */ | |
13808 | o->flags |= SEC_EXCLUDE; | |
13809 | ||
c55fe096 | 13810 | if (info->print_gc_sections && o->size != 0) |
695344c0 | 13811 | /* xgettext:c-format */ |
9793eb77 | 13812 | _bfd_error_handler (_("removing unused section '%pA' in file '%pB'"), |
c08bb8dd | 13813 | o, sub); |
c152c796 AM |
13814 | } |
13815 | } | |
13816 | ||
c152c796 AM |
13817 | return TRUE; |
13818 | } | |
13819 | ||
13820 | /* Propagate collected vtable information. This is called through | |
13821 | elf_link_hash_traverse. */ | |
13822 | ||
13823 | static bfd_boolean | |
13824 | elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry *h, void *okp) | |
13825 | { | |
c152c796 | 13826 | /* Those that are not vtables. */ |
cbd0eecf L |
13827 | if (h->start_stop |
13828 | || h->u2.vtable == NULL | |
13829 | || h->u2.vtable->parent == NULL) | |
c152c796 AM |
13830 | return TRUE; |
13831 | ||
13832 | /* Those vtables that do not have parents, we cannot merge. */ | |
cbd0eecf | 13833 | if (h->u2.vtable->parent == (struct elf_link_hash_entry *) -1) |
c152c796 AM |
13834 | return TRUE; |
13835 | ||
13836 | /* If we've already been done, exit. */ | |
cbd0eecf | 13837 | if (h->u2.vtable->used && h->u2.vtable->used[-1]) |
c152c796 AM |
13838 | return TRUE; |
13839 | ||
13840 | /* Make sure the parent's table is up to date. */ | |
cbd0eecf | 13841 | elf_gc_propagate_vtable_entries_used (h->u2.vtable->parent, okp); |
c152c796 | 13842 | |
cbd0eecf | 13843 | if (h->u2.vtable->used == NULL) |
c152c796 AM |
13844 | { |
13845 | /* None of this table's entries were referenced. Re-use the | |
13846 | parent's table. */ | |
cbd0eecf L |
13847 | h->u2.vtable->used = h->u2.vtable->parent->u2.vtable->used; |
13848 | h->u2.vtable->size = h->u2.vtable->parent->u2.vtable->size; | |
c152c796 AM |
13849 | } |
13850 | else | |
13851 | { | |
13852 | size_t n; | |
13853 | bfd_boolean *cu, *pu; | |
13854 | ||
13855 | /* Or the parent's entries into ours. */ | |
cbd0eecf | 13856 | cu = h->u2.vtable->used; |
c152c796 | 13857 | cu[-1] = TRUE; |
cbd0eecf | 13858 | pu = h->u2.vtable->parent->u2.vtable->used; |
c152c796 AM |
13859 | if (pu != NULL) |
13860 | { | |
13861 | const struct elf_backend_data *bed; | |
13862 | unsigned int log_file_align; | |
13863 | ||
13864 | bed = get_elf_backend_data (h->root.u.def.section->owner); | |
13865 | log_file_align = bed->s->log_file_align; | |
cbd0eecf | 13866 | n = h->u2.vtable->parent->u2.vtable->size >> log_file_align; |
c152c796 AM |
13867 | while (n--) |
13868 | { | |
13869 | if (*pu) | |
13870 | *cu = TRUE; | |
13871 | pu++; | |
13872 | cu++; | |
13873 | } | |
13874 | } | |
13875 | } | |
13876 | ||
13877 | return TRUE; | |
13878 | } | |
13879 | ||
13880 | static bfd_boolean | |
13881 | elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp) | |
13882 | { | |
13883 | asection *sec; | |
13884 | bfd_vma hstart, hend; | |
13885 | Elf_Internal_Rela *relstart, *relend, *rel; | |
13886 | const struct elf_backend_data *bed; | |
13887 | unsigned int log_file_align; | |
13888 | ||
c152c796 AM |
13889 | /* Take care of both those symbols that do not describe vtables as |
13890 | well as those that are not loaded. */ | |
cbd0eecf L |
13891 | if (h->start_stop |
13892 | || h->u2.vtable == NULL | |
13893 | || h->u2.vtable->parent == NULL) | |
c152c796 AM |
13894 | return TRUE; |
13895 | ||
13896 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
13897 | || h->root.type == bfd_link_hash_defweak); | |
13898 | ||
13899 | sec = h->root.u.def.section; | |
13900 | hstart = h->root.u.def.value; | |
13901 | hend = hstart + h->size; | |
13902 | ||
13903 | relstart = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, TRUE); | |
13904 | if (!relstart) | |
13905 | return *(bfd_boolean *) okp = FALSE; | |
13906 | bed = get_elf_backend_data (sec->owner); | |
13907 | log_file_align = bed->s->log_file_align; | |
13908 | ||
056bafd4 | 13909 | relend = relstart + sec->reloc_count; |
c152c796 AM |
13910 | |
13911 | for (rel = relstart; rel < relend; ++rel) | |
13912 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
13913 | { | |
13914 | /* If the entry is in use, do nothing. */ | |
cbd0eecf L |
13915 | if (h->u2.vtable->used |
13916 | && (rel->r_offset - hstart) < h->u2.vtable->size) | |
c152c796 AM |
13917 | { |
13918 | bfd_vma entry = (rel->r_offset - hstart) >> log_file_align; | |
cbd0eecf | 13919 | if (h->u2.vtable->used[entry]) |
c152c796 AM |
13920 | continue; |
13921 | } | |
13922 | /* Otherwise, kill it. */ | |
13923 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
13924 | } | |
13925 | ||
13926 | return TRUE; | |
13927 | } | |
13928 | ||
87538722 AM |
13929 | /* Mark sections containing dynamically referenced symbols. When |
13930 | building shared libraries, we must assume that any visible symbol is | |
13931 | referenced. */ | |
715df9b8 | 13932 | |
64d03ab5 AM |
13933 | bfd_boolean |
13934 | bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry *h, void *inf) | |
715df9b8 | 13935 | { |
87538722 | 13936 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
d6f6f455 | 13937 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
87538722 | 13938 | |
715df9b8 EB |
13939 | if ((h->root.type == bfd_link_hash_defined |
13940 | || h->root.type == bfd_link_hash_defweak) | |
d664fd41 | 13941 | && ((h->ref_dynamic && !h->forced_local) |
c4621b33 | 13942 | || ((h->def_regular || ELF_COMMON_DEF_P (h)) |
87538722 | 13943 | && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL |
fd91d419 | 13944 | && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN |
0e1862bb | 13945 | && (!bfd_link_executable (info) |
22185505 | 13946 | || info->gc_keep_exported |
b407645f AM |
13947 | || info->export_dynamic |
13948 | || (h->dynamic | |
13949 | && d != NULL | |
13950 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
422f1182 | 13951 | && (h->versioned >= versioned |
54e8959c L |
13952 | || !bfd_hide_sym_by_version (info->version_info, |
13953 | h->root.root.string))))) | |
715df9b8 EB |
13954 | h->root.u.def.section->flags |= SEC_KEEP; |
13955 | ||
13956 | return TRUE; | |
13957 | } | |
3b36f7e6 | 13958 | |
74f0fb50 AM |
13959 | /* Keep all sections containing symbols undefined on the command-line, |
13960 | and the section containing the entry symbol. */ | |
13961 | ||
13962 | void | |
13963 | _bfd_elf_gc_keep (struct bfd_link_info *info) | |
13964 | { | |
13965 | struct bfd_sym_chain *sym; | |
13966 | ||
13967 | for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) | |
13968 | { | |
13969 | struct elf_link_hash_entry *h; | |
13970 | ||
13971 | h = elf_link_hash_lookup (elf_hash_table (info), sym->name, | |
13972 | FALSE, FALSE, FALSE); | |
13973 | ||
13974 | if (h != NULL | |
13975 | && (h->root.type == bfd_link_hash_defined | |
13976 | || h->root.type == bfd_link_hash_defweak) | |
2f5541f3 | 13977 | && !bfd_is_const_section (h->root.u.def.section)) |
74f0fb50 AM |
13978 | h->root.u.def.section->flags |= SEC_KEEP; |
13979 | } | |
13980 | } | |
13981 | ||
2f0c68f2 CM |
13982 | bfd_boolean |
13983 | bfd_elf_parse_eh_frame_entries (bfd *abfd ATTRIBUTE_UNUSED, | |
13984 | struct bfd_link_info *info) | |
13985 | { | |
13986 | bfd *ibfd = info->input_bfds; | |
13987 | ||
13988 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
13989 | { | |
13990 | asection *sec; | |
13991 | struct elf_reloc_cookie cookie; | |
13992 | ||
13993 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
13994 | continue; | |
57963c05 AM |
13995 | sec = ibfd->sections; |
13996 | if (sec == NULL || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
13997 | continue; | |
2f0c68f2 CM |
13998 | |
13999 | if (!init_reloc_cookie (&cookie, info, ibfd)) | |
14000 | return FALSE; | |
14001 | ||
14002 | for (sec = ibfd->sections; sec; sec = sec->next) | |
14003 | { | |
fd361982 | 14004 | if (CONST_STRNEQ (bfd_section_name (sec), ".eh_frame_entry") |
2f0c68f2 CM |
14005 | && init_reloc_cookie_rels (&cookie, info, ibfd, sec)) |
14006 | { | |
14007 | _bfd_elf_parse_eh_frame_entry (info, sec, &cookie); | |
14008 | fini_reloc_cookie_rels (&cookie, sec); | |
14009 | } | |
14010 | } | |
14011 | } | |
14012 | return TRUE; | |
14013 | } | |
14014 | ||
c152c796 AM |
14015 | /* Do mark and sweep of unused sections. */ |
14016 | ||
14017 | bfd_boolean | |
14018 | bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info) | |
14019 | { | |
14020 | bfd_boolean ok = TRUE; | |
14021 | bfd *sub; | |
6a5bb875 | 14022 | elf_gc_mark_hook_fn gc_mark_hook; |
64d03ab5 | 14023 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
da44f4e5 | 14024 | struct elf_link_hash_table *htab; |
c152c796 | 14025 | |
64d03ab5 | 14026 | if (!bed->can_gc_sections |
715df9b8 | 14027 | || !is_elf_hash_table (info->hash)) |
c152c796 | 14028 | { |
9793eb77 | 14029 | _bfd_error_handler(_("warning: gc-sections option ignored")); |
c152c796 AM |
14030 | return TRUE; |
14031 | } | |
14032 | ||
74f0fb50 | 14033 | bed->gc_keep (info); |
da44f4e5 | 14034 | htab = elf_hash_table (info); |
74f0fb50 | 14035 | |
9d0a14d3 RS |
14036 | /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section |
14037 | at the .eh_frame section if we can mark the FDEs individually. */ | |
2f0c68f2 CM |
14038 | for (sub = info->input_bfds; |
14039 | info->eh_frame_hdr_type != COMPACT_EH_HDR && sub != NULL; | |
14040 | sub = sub->link.next) | |
9d0a14d3 RS |
14041 | { |
14042 | asection *sec; | |
14043 | struct elf_reloc_cookie cookie; | |
14044 | ||
57963c05 AM |
14045 | sec = sub->sections; |
14046 | if (sec == NULL || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
14047 | continue; | |
9d0a14d3 | 14048 | sec = bfd_get_section_by_name (sub, ".eh_frame"); |
9a2a56cc | 14049 | while (sec && init_reloc_cookie_for_section (&cookie, info, sec)) |
9d0a14d3 RS |
14050 | { |
14051 | _bfd_elf_parse_eh_frame (sub, info, sec, &cookie); | |
9a2a56cc AM |
14052 | if (elf_section_data (sec)->sec_info |
14053 | && (sec->flags & SEC_LINKER_CREATED) == 0) | |
9d0a14d3 RS |
14054 | elf_eh_frame_section (sub) = sec; |
14055 | fini_reloc_cookie_for_section (&cookie, sec); | |
199af150 | 14056 | sec = bfd_get_next_section_by_name (NULL, sec); |
9d0a14d3 RS |
14057 | } |
14058 | } | |
9d0a14d3 | 14059 | |
c152c796 | 14060 | /* Apply transitive closure to the vtable entry usage info. */ |
da44f4e5 | 14061 | elf_link_hash_traverse (htab, elf_gc_propagate_vtable_entries_used, &ok); |
c152c796 AM |
14062 | if (!ok) |
14063 | return FALSE; | |
14064 | ||
14065 | /* Kill the vtable relocations that were not used. */ | |
da44f4e5 | 14066 | elf_link_hash_traverse (htab, elf_gc_smash_unused_vtentry_relocs, &ok); |
c152c796 AM |
14067 | if (!ok) |
14068 | return FALSE; | |
14069 | ||
715df9b8 | 14070 | /* Mark dynamically referenced symbols. */ |
22185505 | 14071 | if (htab->dynamic_sections_created || info->gc_keep_exported) |
da44f4e5 | 14072 | elf_link_hash_traverse (htab, bed->gc_mark_dynamic_ref, info); |
c152c796 | 14073 | |
715df9b8 | 14074 | /* Grovel through relocs to find out who stays ... */ |
64d03ab5 | 14075 | gc_mark_hook = bed->gc_mark_hook; |
c72f2fb2 | 14076 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
14077 | { |
14078 | asection *o; | |
14079 | ||
b19a8f85 | 14080 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
81742b83 | 14081 | || elf_object_id (sub) != elf_hash_table_id (htab) |
b19a8f85 | 14082 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) |
c152c796 AM |
14083 | continue; |
14084 | ||
57963c05 AM |
14085 | o = sub->sections; |
14086 | if (o == NULL || o->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
14087 | continue; | |
14088 | ||
7f6ab9f8 AM |
14089 | /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep). |
14090 | Also treat note sections as a root, if the section is not part | |
8b6f4cd3 L |
14091 | of a group. We must keep all PREINIT_ARRAY, INIT_ARRAY as |
14092 | well as FINI_ARRAY sections for ld -r. */ | |
c152c796 | 14093 | for (o = sub->sections; o != NULL; o = o->next) |
7f6ab9f8 AM |
14094 | if (!o->gc_mark |
14095 | && (o->flags & SEC_EXCLUDE) == 0 | |
24007750 | 14096 | && ((o->flags & SEC_KEEP) != 0 |
8b6f4cd3 L |
14097 | || (bfd_link_relocatable (info) |
14098 | && ((elf_section_data (o)->this_hdr.sh_type | |
14099 | == SHT_PREINIT_ARRAY) | |
14100 | || (elf_section_data (o)->this_hdr.sh_type | |
14101 | == SHT_INIT_ARRAY) | |
14102 | || (elf_section_data (o)->this_hdr.sh_type | |
14103 | == SHT_FINI_ARRAY))) | |
7f6ab9f8 AM |
14104 | || (elf_section_data (o)->this_hdr.sh_type == SHT_NOTE |
14105 | && elf_next_in_group (o) == NULL ))) | |
14106 | { | |
14107 | if (!_bfd_elf_gc_mark (info, o, gc_mark_hook)) | |
14108 | return FALSE; | |
14109 | } | |
c152c796 AM |
14110 | } |
14111 | ||
6a5bb875 | 14112 | /* Allow the backend to mark additional target specific sections. */ |
7f6ab9f8 | 14113 | bed->gc_mark_extra_sections (info, gc_mark_hook); |
6a5bb875 | 14114 | |
c152c796 | 14115 | /* ... and mark SEC_EXCLUDE for those that go. */ |
ccabcbe5 | 14116 | return elf_gc_sweep (abfd, info); |
c152c796 AM |
14117 | } |
14118 | \f | |
14119 | /* Called from check_relocs to record the existence of a VTINHERIT reloc. */ | |
14120 | ||
14121 | bfd_boolean | |
14122 | bfd_elf_gc_record_vtinherit (bfd *abfd, | |
14123 | asection *sec, | |
14124 | struct elf_link_hash_entry *h, | |
14125 | bfd_vma offset) | |
14126 | { | |
14127 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
14128 | struct elf_link_hash_entry **search, *child; | |
ef53be89 | 14129 | size_t extsymcount; |
c152c796 AM |
14130 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
14131 | ||
14132 | /* The sh_info field of the symtab header tells us where the | |
14133 | external symbols start. We don't care about the local symbols at | |
14134 | this point. */ | |
14135 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size / bed->s->sizeof_sym; | |
14136 | if (!elf_bad_symtab (abfd)) | |
14137 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
14138 | ||
14139 | sym_hashes = elf_sym_hashes (abfd); | |
14140 | sym_hashes_end = sym_hashes + extsymcount; | |
14141 | ||
14142 | /* Hunt down the child symbol, which is in this section at the same | |
14143 | offset as the relocation. */ | |
14144 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
14145 | { | |
14146 | if ((child = *search) != NULL | |
14147 | && (child->root.type == bfd_link_hash_defined | |
14148 | || child->root.type == bfd_link_hash_defweak) | |
14149 | && child->root.u.def.section == sec | |
14150 | && child->root.u.def.value == offset) | |
14151 | goto win; | |
14152 | } | |
14153 | ||
695344c0 | 14154 | /* xgettext:c-format */ |
9793eb77 | 14155 | _bfd_error_handler (_("%pB: %pA+%#" PRIx64 ": no symbol found for INHERIT"), |
2dcf00ce | 14156 | abfd, sec, (uint64_t) offset); |
c152c796 AM |
14157 | bfd_set_error (bfd_error_invalid_operation); |
14158 | return FALSE; | |
14159 | ||
14160 | win: | |
cbd0eecf | 14161 | if (!child->u2.vtable) |
f6e332e6 | 14162 | { |
cbd0eecf L |
14163 | child->u2.vtable = ((struct elf_link_virtual_table_entry *) |
14164 | bfd_zalloc (abfd, sizeof (*child->u2.vtable))); | |
14165 | if (!child->u2.vtable) | |
f6e332e6 AM |
14166 | return FALSE; |
14167 | } | |
c152c796 AM |
14168 | if (!h) |
14169 | { | |
14170 | /* This *should* only be the absolute section. It could potentially | |
14171 | be that someone has defined a non-global vtable though, which | |
14172 | would be bad. It isn't worth paging in the local symbols to be | |
14173 | sure though; that case should simply be handled by the assembler. */ | |
14174 | ||
cbd0eecf | 14175 | child->u2.vtable->parent = (struct elf_link_hash_entry *) -1; |
c152c796 AM |
14176 | } |
14177 | else | |
cbd0eecf | 14178 | child->u2.vtable->parent = h; |
c152c796 AM |
14179 | |
14180 | return TRUE; | |
14181 | } | |
14182 | ||
14183 | /* Called from check_relocs to record the existence of a VTENTRY reloc. */ | |
14184 | ||
14185 | bfd_boolean | |
a0ea3a14 | 14186 | bfd_elf_gc_record_vtentry (bfd *abfd, asection *sec, |
c152c796 AM |
14187 | struct elf_link_hash_entry *h, |
14188 | bfd_vma addend) | |
14189 | { | |
14190 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14191 | unsigned int log_file_align = bed->s->log_file_align; | |
14192 | ||
a0ea3a14 L |
14193 | if (!h) |
14194 | { | |
14195 | /* xgettext:c-format */ | |
14196 | _bfd_error_handler (_("%pB: section '%pA': corrupt VTENTRY entry"), | |
14197 | abfd, sec); | |
14198 | bfd_set_error (bfd_error_bad_value); | |
14199 | return FALSE; | |
14200 | } | |
14201 | ||
cbd0eecf | 14202 | if (!h->u2.vtable) |
f6e332e6 | 14203 | { |
cbd0eecf L |
14204 | h->u2.vtable = ((struct elf_link_virtual_table_entry *) |
14205 | bfd_zalloc (abfd, sizeof (*h->u2.vtable))); | |
14206 | if (!h->u2.vtable) | |
f6e332e6 AM |
14207 | return FALSE; |
14208 | } | |
14209 | ||
cbd0eecf | 14210 | if (addend >= h->u2.vtable->size) |
c152c796 AM |
14211 | { |
14212 | size_t size, bytes, file_align; | |
cbd0eecf | 14213 | bfd_boolean *ptr = h->u2.vtable->used; |
c152c796 AM |
14214 | |
14215 | /* While the symbol is undefined, we have to be prepared to handle | |
14216 | a zero size. */ | |
14217 | file_align = 1 << log_file_align; | |
14218 | if (h->root.type == bfd_link_hash_undefined) | |
14219 | size = addend + file_align; | |
14220 | else | |
14221 | { | |
14222 | size = h->size; | |
14223 | if (addend >= size) | |
14224 | { | |
14225 | /* Oops! We've got a reference past the defined end of | |
14226 | the table. This is probably a bug -- shall we warn? */ | |
14227 | size = addend + file_align; | |
14228 | } | |
14229 | } | |
14230 | size = (size + file_align - 1) & -file_align; | |
14231 | ||
14232 | /* Allocate one extra entry for use as a "done" flag for the | |
14233 | consolidation pass. */ | |
14234 | bytes = ((size >> log_file_align) + 1) * sizeof (bfd_boolean); | |
14235 | ||
14236 | if (ptr) | |
14237 | { | |
a50b1753 | 14238 | ptr = (bfd_boolean *) bfd_realloc (ptr - 1, bytes); |
c152c796 AM |
14239 | |
14240 | if (ptr != NULL) | |
14241 | { | |
14242 | size_t oldbytes; | |
14243 | ||
cbd0eecf | 14244 | oldbytes = (((h->u2.vtable->size >> log_file_align) + 1) |
c152c796 AM |
14245 | * sizeof (bfd_boolean)); |
14246 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); | |
14247 | } | |
14248 | } | |
14249 | else | |
a50b1753 | 14250 | ptr = (bfd_boolean *) bfd_zmalloc (bytes); |
c152c796 AM |
14251 | |
14252 | if (ptr == NULL) | |
14253 | return FALSE; | |
14254 | ||
14255 | /* And arrange for that done flag to be at index -1. */ | |
cbd0eecf L |
14256 | h->u2.vtable->used = ptr + 1; |
14257 | h->u2.vtable->size = size; | |
c152c796 AM |
14258 | } |
14259 | ||
cbd0eecf | 14260 | h->u2.vtable->used[addend >> log_file_align] = TRUE; |
c152c796 AM |
14261 | |
14262 | return TRUE; | |
14263 | } | |
14264 | ||
ae17ab41 CM |
14265 | /* Map an ELF section header flag to its corresponding string. */ |
14266 | typedef struct | |
14267 | { | |
14268 | char *flag_name; | |
14269 | flagword flag_value; | |
14270 | } elf_flags_to_name_table; | |
14271 | ||
14272 | static elf_flags_to_name_table elf_flags_to_names [] = | |
14273 | { | |
14274 | { "SHF_WRITE", SHF_WRITE }, | |
14275 | { "SHF_ALLOC", SHF_ALLOC }, | |
14276 | { "SHF_EXECINSTR", SHF_EXECINSTR }, | |
14277 | { "SHF_MERGE", SHF_MERGE }, | |
14278 | { "SHF_STRINGS", SHF_STRINGS }, | |
14279 | { "SHF_INFO_LINK", SHF_INFO_LINK}, | |
14280 | { "SHF_LINK_ORDER", SHF_LINK_ORDER}, | |
14281 | { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING}, | |
14282 | { "SHF_GROUP", SHF_GROUP }, | |
14283 | { "SHF_TLS", SHF_TLS }, | |
14284 | { "SHF_MASKOS", SHF_MASKOS }, | |
14285 | { "SHF_EXCLUDE", SHF_EXCLUDE }, | |
14286 | }; | |
14287 | ||
b9c361e0 JL |
14288 | /* Returns TRUE if the section is to be included, otherwise FALSE. */ |
14289 | bfd_boolean | |
ae17ab41 | 14290 | bfd_elf_lookup_section_flags (struct bfd_link_info *info, |
8b127cbc | 14291 | struct flag_info *flaginfo, |
b9c361e0 | 14292 | asection *section) |
ae17ab41 | 14293 | { |
8b127cbc | 14294 | const bfd_vma sh_flags = elf_section_flags (section); |
ae17ab41 | 14295 | |
8b127cbc | 14296 | if (!flaginfo->flags_initialized) |
ae17ab41 | 14297 | { |
8b127cbc AM |
14298 | bfd *obfd = info->output_bfd; |
14299 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
14300 | struct flag_info_list *tf = flaginfo->flag_list; | |
b9c361e0 JL |
14301 | int with_hex = 0; |
14302 | int without_hex = 0; | |
14303 | ||
8b127cbc | 14304 | for (tf = flaginfo->flag_list; tf != NULL; tf = tf->next) |
ae17ab41 | 14305 | { |
b9c361e0 | 14306 | unsigned i; |
8b127cbc | 14307 | flagword (*lookup) (char *); |
ae17ab41 | 14308 | |
8b127cbc AM |
14309 | lookup = bed->elf_backend_lookup_section_flags_hook; |
14310 | if (lookup != NULL) | |
ae17ab41 | 14311 | { |
8b127cbc | 14312 | flagword hexval = (*lookup) ((char *) tf->name); |
b9c361e0 JL |
14313 | |
14314 | if (hexval != 0) | |
14315 | { | |
14316 | if (tf->with == with_flags) | |
14317 | with_hex |= hexval; | |
14318 | else if (tf->with == without_flags) | |
14319 | without_hex |= hexval; | |
14320 | tf->valid = TRUE; | |
14321 | continue; | |
14322 | } | |
ae17ab41 | 14323 | } |
8b127cbc | 14324 | for (i = 0; i < ARRAY_SIZE (elf_flags_to_names); ++i) |
ae17ab41 | 14325 | { |
8b127cbc | 14326 | if (strcmp (tf->name, elf_flags_to_names[i].flag_name) == 0) |
b9c361e0 JL |
14327 | { |
14328 | if (tf->with == with_flags) | |
14329 | with_hex |= elf_flags_to_names[i].flag_value; | |
14330 | else if (tf->with == without_flags) | |
14331 | without_hex |= elf_flags_to_names[i].flag_value; | |
14332 | tf->valid = TRUE; | |
14333 | break; | |
14334 | } | |
14335 | } | |
8b127cbc | 14336 | if (!tf->valid) |
b9c361e0 | 14337 | { |
68ffbac6 | 14338 | info->callbacks->einfo |
9793eb77 | 14339 | (_("unrecognized INPUT_SECTION_FLAG %s\n"), tf->name); |
b9c361e0 | 14340 | return FALSE; |
ae17ab41 CM |
14341 | } |
14342 | } | |
8b127cbc AM |
14343 | flaginfo->flags_initialized = TRUE; |
14344 | flaginfo->only_with_flags |= with_hex; | |
14345 | flaginfo->not_with_flags |= without_hex; | |
ae17ab41 | 14346 | } |
ae17ab41 | 14347 | |
8b127cbc | 14348 | if ((flaginfo->only_with_flags & sh_flags) != flaginfo->only_with_flags) |
b9c361e0 JL |
14349 | return FALSE; |
14350 | ||
8b127cbc | 14351 | if ((flaginfo->not_with_flags & sh_flags) != 0) |
b9c361e0 JL |
14352 | return FALSE; |
14353 | ||
14354 | return TRUE; | |
ae17ab41 CM |
14355 | } |
14356 | ||
c152c796 AM |
14357 | struct alloc_got_off_arg { |
14358 | bfd_vma gotoff; | |
10455f89 | 14359 | struct bfd_link_info *info; |
c152c796 AM |
14360 | }; |
14361 | ||
14362 | /* We need a special top-level link routine to convert got reference counts | |
14363 | to real got offsets. */ | |
14364 | ||
14365 | static bfd_boolean | |
14366 | elf_gc_allocate_got_offsets (struct elf_link_hash_entry *h, void *arg) | |
14367 | { | |
a50b1753 | 14368 | struct alloc_got_off_arg *gofarg = (struct alloc_got_off_arg *) arg; |
10455f89 HPN |
14369 | bfd *obfd = gofarg->info->output_bfd; |
14370 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
c152c796 | 14371 | |
c152c796 AM |
14372 | if (h->got.refcount > 0) |
14373 | { | |
14374 | h->got.offset = gofarg->gotoff; | |
10455f89 | 14375 | gofarg->gotoff += bed->got_elt_size (obfd, gofarg->info, h, NULL, 0); |
c152c796 AM |
14376 | } |
14377 | else | |
14378 | h->got.offset = (bfd_vma) -1; | |
14379 | ||
14380 | return TRUE; | |
14381 | } | |
14382 | ||
14383 | /* And an accompanying bit to work out final got entry offsets once | |
14384 | we're done. Should be called from final_link. */ | |
14385 | ||
14386 | bfd_boolean | |
14387 | bfd_elf_gc_common_finalize_got_offsets (bfd *abfd, | |
14388 | struct bfd_link_info *info) | |
14389 | { | |
14390 | bfd *i; | |
14391 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14392 | bfd_vma gotoff; | |
c152c796 AM |
14393 | struct alloc_got_off_arg gofarg; |
14394 | ||
10455f89 HPN |
14395 | BFD_ASSERT (abfd == info->output_bfd); |
14396 | ||
c152c796 AM |
14397 | if (! is_elf_hash_table (info->hash)) |
14398 | return FALSE; | |
14399 | ||
14400 | /* The GOT offset is relative to the .got section, but the GOT header is | |
14401 | put into the .got.plt section, if the backend uses it. */ | |
14402 | if (bed->want_got_plt) | |
14403 | gotoff = 0; | |
14404 | else | |
14405 | gotoff = bed->got_header_size; | |
14406 | ||
14407 | /* Do the local .got entries first. */ | |
c72f2fb2 | 14408 | for (i = info->input_bfds; i; i = i->link.next) |
c152c796 AM |
14409 | { |
14410 | bfd_signed_vma *local_got; | |
ef53be89 | 14411 | size_t j, locsymcount; |
c152c796 AM |
14412 | Elf_Internal_Shdr *symtab_hdr; |
14413 | ||
14414 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) | |
14415 | continue; | |
14416 | ||
14417 | local_got = elf_local_got_refcounts (i); | |
14418 | if (!local_got) | |
14419 | continue; | |
14420 | ||
14421 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
14422 | if (elf_bad_symtab (i)) | |
14423 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
14424 | else | |
14425 | locsymcount = symtab_hdr->sh_info; | |
14426 | ||
14427 | for (j = 0; j < locsymcount; ++j) | |
14428 | { | |
14429 | if (local_got[j] > 0) | |
14430 | { | |
14431 | local_got[j] = gotoff; | |
10455f89 | 14432 | gotoff += bed->got_elt_size (abfd, info, NULL, i, j); |
c152c796 AM |
14433 | } |
14434 | else | |
14435 | local_got[j] = (bfd_vma) -1; | |
14436 | } | |
14437 | } | |
14438 | ||
14439 | /* Then the global .got entries. .plt refcounts are handled by | |
14440 | adjust_dynamic_symbol */ | |
14441 | gofarg.gotoff = gotoff; | |
10455f89 | 14442 | gofarg.info = info; |
c152c796 AM |
14443 | elf_link_hash_traverse (elf_hash_table (info), |
14444 | elf_gc_allocate_got_offsets, | |
14445 | &gofarg); | |
14446 | return TRUE; | |
14447 | } | |
14448 | ||
14449 | /* Many folk need no more in the way of final link than this, once | |
14450 | got entry reference counting is enabled. */ | |
14451 | ||
14452 | bfd_boolean | |
14453 | bfd_elf_gc_common_final_link (bfd *abfd, struct bfd_link_info *info) | |
14454 | { | |
14455 | if (!bfd_elf_gc_common_finalize_got_offsets (abfd, info)) | |
14456 | return FALSE; | |
14457 | ||
14458 | /* Invoke the regular ELF backend linker to do all the work. */ | |
14459 | return bfd_elf_final_link (abfd, info); | |
14460 | } | |
14461 | ||
14462 | bfd_boolean | |
14463 | bfd_elf_reloc_symbol_deleted_p (bfd_vma offset, void *cookie) | |
14464 | { | |
a50b1753 | 14465 | struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie; |
c152c796 AM |
14466 | |
14467 | if (rcookie->bad_symtab) | |
14468 | rcookie->rel = rcookie->rels; | |
14469 | ||
14470 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
14471 | { | |
14472 | unsigned long r_symndx; | |
14473 | ||
14474 | if (! rcookie->bad_symtab) | |
14475 | if (rcookie->rel->r_offset > offset) | |
14476 | return FALSE; | |
14477 | if (rcookie->rel->r_offset != offset) | |
14478 | continue; | |
14479 | ||
14480 | r_symndx = rcookie->rel->r_info >> rcookie->r_sym_shift; | |
2c2fa401 | 14481 | if (r_symndx == STN_UNDEF) |
c152c796 AM |
14482 | return TRUE; |
14483 | ||
14484 | if (r_symndx >= rcookie->locsymcount | |
14485 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
14486 | { | |
14487 | struct elf_link_hash_entry *h; | |
14488 | ||
14489 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
14490 | ||
14491 | while (h->root.type == bfd_link_hash_indirect | |
14492 | || h->root.type == bfd_link_hash_warning) | |
14493 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
14494 | ||
14495 | if ((h->root.type == bfd_link_hash_defined | |
14496 | || h->root.type == bfd_link_hash_defweak) | |
5b69e357 AM |
14497 | && (h->root.u.def.section->owner != rcookie->abfd |
14498 | || h->root.u.def.section->kept_section != NULL | |
14499 | || discarded_section (h->root.u.def.section))) | |
c152c796 | 14500 | return TRUE; |
c152c796 AM |
14501 | } |
14502 | else | |
14503 | { | |
14504 | /* It's not a relocation against a global symbol, | |
14505 | but it could be a relocation against a local | |
14506 | symbol for a discarded section. */ | |
14507 | asection *isec; | |
14508 | Elf_Internal_Sym *isym; | |
14509 | ||
14510 | /* Need to: get the symbol; get the section. */ | |
14511 | isym = &rcookie->locsyms[r_symndx]; | |
cb33740c | 14512 | isec = bfd_section_from_elf_index (rcookie->abfd, isym->st_shndx); |
5b69e357 AM |
14513 | if (isec != NULL |
14514 | && (isec->kept_section != NULL | |
14515 | || discarded_section (isec))) | |
cb33740c | 14516 | return TRUE; |
c152c796 AM |
14517 | } |
14518 | return FALSE; | |
14519 | } | |
14520 | return FALSE; | |
14521 | } | |
14522 | ||
14523 | /* Discard unneeded references to discarded sections. | |
75938853 AM |
14524 | Returns -1 on error, 1 if any section's size was changed, 0 if |
14525 | nothing changed. This function assumes that the relocations are in | |
14526 | sorted order, which is true for all known assemblers. */ | |
c152c796 | 14527 | |
75938853 | 14528 | int |
c152c796 AM |
14529 | bfd_elf_discard_info (bfd *output_bfd, struct bfd_link_info *info) |
14530 | { | |
14531 | struct elf_reloc_cookie cookie; | |
18cd5bce | 14532 | asection *o; |
c152c796 | 14533 | bfd *abfd; |
75938853 | 14534 | int changed = 0; |
c152c796 AM |
14535 | |
14536 | if (info->traditional_format | |
14537 | || !is_elf_hash_table (info->hash)) | |
75938853 | 14538 | return 0; |
c152c796 | 14539 | |
18cd5bce AM |
14540 | o = bfd_get_section_by_name (output_bfd, ".stab"); |
14541 | if (o != NULL) | |
c152c796 | 14542 | { |
18cd5bce | 14543 | asection *i; |
c152c796 | 14544 | |
18cd5bce | 14545 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
8da3dbc5 | 14546 | { |
18cd5bce AM |
14547 | if (i->size == 0 |
14548 | || i->reloc_count == 0 | |
14549 | || i->sec_info_type != SEC_INFO_TYPE_STABS) | |
14550 | continue; | |
c152c796 | 14551 | |
18cd5bce AM |
14552 | abfd = i->owner; |
14553 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
14554 | continue; | |
c152c796 | 14555 | |
18cd5bce | 14556 | if (!init_reloc_cookie_for_section (&cookie, info, i)) |
75938853 | 14557 | return -1; |
c152c796 | 14558 | |
18cd5bce AM |
14559 | if (_bfd_discard_section_stabs (abfd, i, |
14560 | elf_section_data (i)->sec_info, | |
5241d853 RS |
14561 | bfd_elf_reloc_symbol_deleted_p, |
14562 | &cookie)) | |
75938853 | 14563 | changed = 1; |
18cd5bce AM |
14564 | |
14565 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 14566 | } |
18cd5bce AM |
14567 | } |
14568 | ||
2f0c68f2 CM |
14569 | o = NULL; |
14570 | if (info->eh_frame_hdr_type != COMPACT_EH_HDR) | |
14571 | o = bfd_get_section_by_name (output_bfd, ".eh_frame"); | |
18cd5bce AM |
14572 | if (o != NULL) |
14573 | { | |
14574 | asection *i; | |
d7153c4a | 14575 | int eh_changed = 0; |
66631823 | 14576 | unsigned int eh_alignment; /* Octets. */ |
c152c796 | 14577 | |
18cd5bce | 14578 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
c152c796 | 14579 | { |
18cd5bce AM |
14580 | if (i->size == 0) |
14581 | continue; | |
14582 | ||
14583 | abfd = i->owner; | |
14584 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
14585 | continue; | |
14586 | ||
14587 | if (!init_reloc_cookie_for_section (&cookie, info, i)) | |
75938853 | 14588 | return -1; |
18cd5bce AM |
14589 | |
14590 | _bfd_elf_parse_eh_frame (abfd, info, i, &cookie); | |
14591 | if (_bfd_elf_discard_section_eh_frame (abfd, info, i, | |
c152c796 AM |
14592 | bfd_elf_reloc_symbol_deleted_p, |
14593 | &cookie)) | |
d7153c4a AM |
14594 | { |
14595 | eh_changed = 1; | |
14596 | if (i->size != i->rawsize) | |
14597 | changed = 1; | |
14598 | } | |
18cd5bce AM |
14599 | |
14600 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 14601 | } |
9866ffe2 | 14602 | |
66631823 CE |
14603 | eh_alignment = ((1 << o->alignment_power) |
14604 | * bfd_octets_per_byte (output_bfd, o)); | |
9866ffe2 AM |
14605 | /* Skip over zero terminator, and prevent empty sections from |
14606 | adding alignment padding at the end. */ | |
14607 | for (i = o->map_tail.s; i != NULL; i = i->map_tail.s) | |
14608 | if (i->size == 0) | |
14609 | i->flags |= SEC_EXCLUDE; | |
14610 | else if (i->size > 4) | |
14611 | break; | |
14612 | /* The last non-empty eh_frame section doesn't need padding. */ | |
14613 | if (i != NULL) | |
14614 | i = i->map_tail.s; | |
14615 | /* Any prior sections must pad the last FDE out to the output | |
14616 | section alignment. Otherwise we might have zero padding | |
14617 | between sections, which would be seen as a terminator. */ | |
14618 | for (; i != NULL; i = i->map_tail.s) | |
14619 | if (i->size == 4) | |
14620 | /* All but the last zero terminator should have been removed. */ | |
14621 | BFD_FAIL (); | |
14622 | else | |
14623 | { | |
14624 | bfd_size_type size | |
14625 | = (i->size + eh_alignment - 1) & -eh_alignment; | |
14626 | if (i->size != size) | |
af471f82 | 14627 | { |
9866ffe2 AM |
14628 | i->size = size; |
14629 | changed = 1; | |
14630 | eh_changed = 1; | |
af471f82 | 14631 | } |
9866ffe2 | 14632 | } |
d7153c4a AM |
14633 | if (eh_changed) |
14634 | elf_link_hash_traverse (elf_hash_table (info), | |
14635 | _bfd_elf_adjust_eh_frame_global_symbol, NULL); | |
18cd5bce | 14636 | } |
c152c796 | 14637 | |
18cd5bce AM |
14638 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next) |
14639 | { | |
14640 | const struct elf_backend_data *bed; | |
57963c05 | 14641 | asection *s; |
c152c796 | 14642 | |
18cd5bce AM |
14643 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
14644 | continue; | |
57963c05 AM |
14645 | s = abfd->sections; |
14646 | if (s == NULL || s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
14647 | continue; | |
18cd5bce AM |
14648 | |
14649 | bed = get_elf_backend_data (abfd); | |
14650 | ||
14651 | if (bed->elf_backend_discard_info != NULL) | |
14652 | { | |
14653 | if (!init_reloc_cookie (&cookie, info, abfd)) | |
75938853 | 14654 | return -1; |
18cd5bce AM |
14655 | |
14656 | if ((*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
75938853 | 14657 | changed = 1; |
18cd5bce AM |
14658 | |
14659 | fini_reloc_cookie (&cookie, abfd); | |
14660 | } | |
c152c796 AM |
14661 | } |
14662 | ||
2f0c68f2 CM |
14663 | if (info->eh_frame_hdr_type == COMPACT_EH_HDR) |
14664 | _bfd_elf_end_eh_frame_parsing (info); | |
14665 | ||
14666 | if (info->eh_frame_hdr_type | |
0e1862bb | 14667 | && !bfd_link_relocatable (info) |
c152c796 | 14668 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) |
75938853 | 14669 | changed = 1; |
c152c796 | 14670 | |
75938853 | 14671 | return changed; |
c152c796 | 14672 | } |
082b7297 | 14673 | |
43e1669b | 14674 | bfd_boolean |
0c511000 | 14675 | _bfd_elf_section_already_linked (bfd *abfd, |
c77ec726 | 14676 | asection *sec, |
c0f00686 | 14677 | struct bfd_link_info *info) |
082b7297 L |
14678 | { |
14679 | flagword flags; | |
c77ec726 | 14680 | const char *name, *key; |
082b7297 L |
14681 | struct bfd_section_already_linked *l; |
14682 | struct bfd_section_already_linked_hash_entry *already_linked_list; | |
0c511000 | 14683 | |
c77ec726 AM |
14684 | if (sec->output_section == bfd_abs_section_ptr) |
14685 | return FALSE; | |
0c511000 | 14686 | |
c77ec726 | 14687 | flags = sec->flags; |
0c511000 | 14688 | |
c77ec726 AM |
14689 | /* Return if it isn't a linkonce section. A comdat group section |
14690 | also has SEC_LINK_ONCE set. */ | |
14691 | if ((flags & SEC_LINK_ONCE) == 0) | |
14692 | return FALSE; | |
0c511000 | 14693 | |
c77ec726 AM |
14694 | /* Don't put group member sections on our list of already linked |
14695 | sections. They are handled as a group via their group section. */ | |
14696 | if (elf_sec_group (sec) != NULL) | |
14697 | return FALSE; | |
0c511000 | 14698 | |
c77ec726 AM |
14699 | /* For a SHT_GROUP section, use the group signature as the key. */ |
14700 | name = sec->name; | |
14701 | if ((flags & SEC_GROUP) != 0 | |
14702 | && elf_next_in_group (sec) != NULL | |
14703 | && elf_group_name (elf_next_in_group (sec)) != NULL) | |
14704 | key = elf_group_name (elf_next_in_group (sec)); | |
14705 | else | |
14706 | { | |
14707 | /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */ | |
0c511000 | 14708 | if (CONST_STRNEQ (name, ".gnu.linkonce.") |
c77ec726 AM |
14709 | && (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL) |
14710 | key++; | |
0c511000 | 14711 | else |
c77ec726 AM |
14712 | /* Must be a user linkonce section that doesn't follow gcc's |
14713 | naming convention. In this case we won't be matching | |
14714 | single member groups. */ | |
14715 | key = name; | |
0c511000 | 14716 | } |
6d2cd210 | 14717 | |
c77ec726 | 14718 | already_linked_list = bfd_section_already_linked_table_lookup (key); |
082b7297 L |
14719 | |
14720 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
14721 | { | |
c2370991 | 14722 | /* We may have 2 different types of sections on the list: group |
c77ec726 AM |
14723 | sections with a signature of <key> (<key> is some string), |
14724 | and linkonce sections named .gnu.linkonce.<type>.<key>. | |
14725 | Match like sections. LTO plugin sections are an exception. | |
14726 | They are always named .gnu.linkonce.t.<key> and match either | |
14727 | type of section. */ | |
14728 | if (((flags & SEC_GROUP) == (l->sec->flags & SEC_GROUP) | |
14729 | && ((flags & SEC_GROUP) != 0 | |
14730 | || strcmp (name, l->sec->name) == 0)) | |
e8a83e93 MB |
14731 | || (l->sec->owner->flags & BFD_PLUGIN) != 0 |
14732 | || (sec->owner->flags & BFD_PLUGIN) != 0) | |
082b7297 L |
14733 | { |
14734 | /* The section has already been linked. See if we should | |
6d2cd210 | 14735 | issue a warning. */ |
c77ec726 AM |
14736 | if (!_bfd_handle_already_linked (sec, l, info)) |
14737 | return FALSE; | |
082b7297 | 14738 | |
c77ec726 | 14739 | if (flags & SEC_GROUP) |
3d7f7666 | 14740 | { |
c77ec726 AM |
14741 | asection *first = elf_next_in_group (sec); |
14742 | asection *s = first; | |
3d7f7666 | 14743 | |
c77ec726 | 14744 | while (s != NULL) |
3d7f7666 | 14745 | { |
c77ec726 AM |
14746 | s->output_section = bfd_abs_section_ptr; |
14747 | /* Record which group discards it. */ | |
14748 | s->kept_section = l->sec; | |
14749 | s = elf_next_in_group (s); | |
14750 | /* These lists are circular. */ | |
14751 | if (s == first) | |
14752 | break; | |
3d7f7666 L |
14753 | } |
14754 | } | |
082b7297 | 14755 | |
43e1669b | 14756 | return TRUE; |
082b7297 L |
14757 | } |
14758 | } | |
14759 | ||
c77ec726 AM |
14760 | /* A single member comdat group section may be discarded by a |
14761 | linkonce section and vice versa. */ | |
14762 | if ((flags & SEC_GROUP) != 0) | |
3d7f7666 | 14763 | { |
c77ec726 | 14764 | asection *first = elf_next_in_group (sec); |
c2370991 | 14765 | |
c77ec726 AM |
14766 | if (first != NULL && elf_next_in_group (first) == first) |
14767 | /* Check this single member group against linkonce sections. */ | |
14768 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
14769 | if ((l->sec->flags & SEC_GROUP) == 0 | |
14770 | && bfd_elf_match_symbols_in_sections (l->sec, first, info)) | |
14771 | { | |
14772 | first->output_section = bfd_abs_section_ptr; | |
14773 | first->kept_section = l->sec; | |
14774 | sec->output_section = bfd_abs_section_ptr; | |
14775 | break; | |
14776 | } | |
14777 | } | |
14778 | else | |
14779 | /* Check this linkonce section against single member groups. */ | |
14780 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
14781 | if (l->sec->flags & SEC_GROUP) | |
6d2cd210 | 14782 | { |
c77ec726 | 14783 | asection *first = elf_next_in_group (l->sec); |
6d2cd210 | 14784 | |
c77ec726 AM |
14785 | if (first != NULL |
14786 | && elf_next_in_group (first) == first | |
14787 | && bfd_elf_match_symbols_in_sections (first, sec, info)) | |
14788 | { | |
14789 | sec->output_section = bfd_abs_section_ptr; | |
14790 | sec->kept_section = first; | |
14791 | break; | |
14792 | } | |
6d2cd210 | 14793 | } |
0c511000 | 14794 | |
c77ec726 AM |
14795 | /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F' |
14796 | referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4 | |
14797 | specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce' | |
14798 | prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its | |
14799 | matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded | |
14800 | but its `.gnu.linkonce.t.F' is discarded means we chose one-only | |
14801 | `.gnu.linkonce.t.F' section from a different bfd not requiring any | |
14802 | `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded. | |
14803 | The reverse order cannot happen as there is never a bfd with only the | |
14804 | `.gnu.linkonce.r.F' section. The order of sections in a bfd does not | |
14805 | matter as here were are looking only for cross-bfd sections. */ | |
14806 | ||
14807 | if ((flags & SEC_GROUP) == 0 && CONST_STRNEQ (name, ".gnu.linkonce.r.")) | |
14808 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
14809 | if ((l->sec->flags & SEC_GROUP) == 0 | |
14810 | && CONST_STRNEQ (l->sec->name, ".gnu.linkonce.t.")) | |
14811 | { | |
14812 | if (abfd != l->sec->owner) | |
14813 | sec->output_section = bfd_abs_section_ptr; | |
14814 | break; | |
14815 | } | |
80c29487 | 14816 | |
082b7297 | 14817 | /* This is the first section with this name. Record it. */ |
c77ec726 | 14818 | if (!bfd_section_already_linked_table_insert (already_linked_list, sec)) |
bb6198d2 | 14819 | info->callbacks->einfo (_("%F%P: already_linked_table: %E\n")); |
c77ec726 | 14820 | return sec->output_section == bfd_abs_section_ptr; |
082b7297 | 14821 | } |
81e1b023 | 14822 | |
a4d8e49b L |
14823 | bfd_boolean |
14824 | _bfd_elf_common_definition (Elf_Internal_Sym *sym) | |
14825 | { | |
14826 | return sym->st_shndx == SHN_COMMON; | |
14827 | } | |
14828 | ||
14829 | unsigned int | |
14830 | _bfd_elf_common_section_index (asection *sec ATTRIBUTE_UNUSED) | |
14831 | { | |
14832 | return SHN_COMMON; | |
14833 | } | |
14834 | ||
14835 | asection * | |
14836 | _bfd_elf_common_section (asection *sec ATTRIBUTE_UNUSED) | |
14837 | { | |
14838 | return bfd_com_section_ptr; | |
14839 | } | |
10455f89 HPN |
14840 | |
14841 | bfd_vma | |
14842 | _bfd_elf_default_got_elt_size (bfd *abfd, | |
14843 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
14844 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, | |
14845 | bfd *ibfd ATTRIBUTE_UNUSED, | |
14846 | unsigned long symndx ATTRIBUTE_UNUSED) | |
14847 | { | |
14848 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14849 | return bed->s->arch_size / 8; | |
14850 | } | |
83bac4b0 NC |
14851 | |
14852 | /* Routines to support the creation of dynamic relocs. */ | |
14853 | ||
83bac4b0 NC |
14854 | /* Returns the name of the dynamic reloc section associated with SEC. */ |
14855 | ||
14856 | static const char * | |
14857 | get_dynamic_reloc_section_name (bfd * abfd, | |
14858 | asection * sec, | |
14859 | bfd_boolean is_rela) | |
14860 | { | |
ddcf1fcf | 14861 | char *name; |
fd361982 | 14862 | const char *old_name = bfd_section_name (sec); |
ddcf1fcf | 14863 | const char *prefix = is_rela ? ".rela" : ".rel"; |
83bac4b0 | 14864 | |
ddcf1fcf | 14865 | if (old_name == NULL) |
83bac4b0 NC |
14866 | return NULL; |
14867 | ||
ddcf1fcf | 14868 | name = bfd_alloc (abfd, strlen (prefix) + strlen (old_name) + 1); |
68ffbac6 | 14869 | sprintf (name, "%s%s", prefix, old_name); |
83bac4b0 NC |
14870 | |
14871 | return name; | |
14872 | } | |
14873 | ||
14874 | /* Returns the dynamic reloc section associated with SEC. | |
14875 | If necessary compute the name of the dynamic reloc section based | |
14876 | on SEC's name (looked up in ABFD's string table) and the setting | |
14877 | of IS_RELA. */ | |
14878 | ||
14879 | asection * | |
14880 | _bfd_elf_get_dynamic_reloc_section (bfd * abfd, | |
14881 | asection * sec, | |
14882 | bfd_boolean is_rela) | |
14883 | { | |
14884 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
14885 | ||
14886 | if (reloc_sec == NULL) | |
14887 | { | |
14888 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
14889 | ||
14890 | if (name != NULL) | |
14891 | { | |
3d4d4302 | 14892 | reloc_sec = bfd_get_linker_section (abfd, name); |
83bac4b0 NC |
14893 | |
14894 | if (reloc_sec != NULL) | |
14895 | elf_section_data (sec)->sreloc = reloc_sec; | |
14896 | } | |
14897 | } | |
14898 | ||
14899 | return reloc_sec; | |
14900 | } | |
14901 | ||
14902 | /* Returns the dynamic reloc section associated with SEC. If the | |
14903 | section does not exist it is created and attached to the DYNOBJ | |
14904 | bfd and stored in the SRELOC field of SEC's elf_section_data | |
14905 | structure. | |
f8076f98 | 14906 | |
83bac4b0 NC |
14907 | ALIGNMENT is the alignment for the newly created section and |
14908 | IS_RELA defines whether the name should be .rela.<SEC's name> | |
14909 | or .rel.<SEC's name>. The section name is looked up in the | |
14910 | string table associated with ABFD. */ | |
14911 | ||
14912 | asection * | |
ca4be51c AM |
14913 | _bfd_elf_make_dynamic_reloc_section (asection *sec, |
14914 | bfd *dynobj, | |
14915 | unsigned int alignment, | |
14916 | bfd *abfd, | |
14917 | bfd_boolean is_rela) | |
83bac4b0 NC |
14918 | { |
14919 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
14920 | ||
14921 | if (reloc_sec == NULL) | |
14922 | { | |
14923 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
14924 | ||
14925 | if (name == NULL) | |
14926 | return NULL; | |
14927 | ||
3d4d4302 | 14928 | reloc_sec = bfd_get_linker_section (dynobj, name); |
83bac4b0 NC |
14929 | |
14930 | if (reloc_sec == NULL) | |
14931 | { | |
3d4d4302 AM |
14932 | flagword flags = (SEC_HAS_CONTENTS | SEC_READONLY |
14933 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
83bac4b0 NC |
14934 | if ((sec->flags & SEC_ALLOC) != 0) |
14935 | flags |= SEC_ALLOC | SEC_LOAD; | |
14936 | ||
3d4d4302 | 14937 | reloc_sec = bfd_make_section_anyway_with_flags (dynobj, name, flags); |
83bac4b0 NC |
14938 | if (reloc_sec != NULL) |
14939 | { | |
8877b5e5 AM |
14940 | /* _bfd_elf_get_sec_type_attr chooses a section type by |
14941 | name. Override as it may be wrong, eg. for a user | |
14942 | section named "auto" we'll get ".relauto" which is | |
14943 | seen to be a .rela section. */ | |
14944 | elf_section_type (reloc_sec) = is_rela ? SHT_RELA : SHT_REL; | |
fd361982 | 14945 | if (!bfd_set_section_alignment (reloc_sec, alignment)) |
83bac4b0 NC |
14946 | reloc_sec = NULL; |
14947 | } | |
14948 | } | |
14949 | ||
14950 | elf_section_data (sec)->sreloc = reloc_sec; | |
14951 | } | |
14952 | ||
14953 | return reloc_sec; | |
14954 | } | |
1338dd10 | 14955 | |
bffebb6b AM |
14956 | /* Copy the ELF symbol type and other attributes for a linker script |
14957 | assignment from HSRC to HDEST. Generally this should be treated as | |
14958 | if we found a strong non-dynamic definition for HDEST (except that | |
14959 | ld ignores multiple definition errors). */ | |
1338dd10 | 14960 | void |
bffebb6b AM |
14961 | _bfd_elf_copy_link_hash_symbol_type (bfd *abfd, |
14962 | struct bfd_link_hash_entry *hdest, | |
14963 | struct bfd_link_hash_entry *hsrc) | |
1338dd10 | 14964 | { |
bffebb6b AM |
14965 | struct elf_link_hash_entry *ehdest = (struct elf_link_hash_entry *) hdest; |
14966 | struct elf_link_hash_entry *ehsrc = (struct elf_link_hash_entry *) hsrc; | |
14967 | Elf_Internal_Sym isym; | |
1338dd10 PB |
14968 | |
14969 | ehdest->type = ehsrc->type; | |
35fc36a8 | 14970 | ehdest->target_internal = ehsrc->target_internal; |
bffebb6b AM |
14971 | |
14972 | isym.st_other = ehsrc->other; | |
b8417128 | 14973 | elf_merge_st_other (abfd, ehdest, &isym, NULL, TRUE, FALSE); |
1338dd10 | 14974 | } |
351f65ca L |
14975 | |
14976 | /* Append a RELA relocation REL to section S in BFD. */ | |
14977 | ||
14978 | void | |
14979 | elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
14980 | { | |
14981 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14982 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); | |
14983 | BFD_ASSERT (loc + bed->s->sizeof_rela <= s->contents + s->size); | |
14984 | bed->s->swap_reloca_out (abfd, rel, loc); | |
14985 | } | |
14986 | ||
14987 | /* Append a REL relocation REL to section S in BFD. */ | |
14988 | ||
14989 | void | |
14990 | elf_append_rel (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
14991 | { | |
14992 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14993 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rel); | |
14994 | BFD_ASSERT (loc + bed->s->sizeof_rel <= s->contents + s->size); | |
59d6ffb2 | 14995 | bed->s->swap_reloc_out (abfd, rel, loc); |
351f65ca | 14996 | } |
7dba9362 AM |
14997 | |
14998 | /* Define __start, __stop, .startof. or .sizeof. symbol. */ | |
14999 | ||
15000 | struct bfd_link_hash_entry * | |
15001 | bfd_elf_define_start_stop (struct bfd_link_info *info, | |
15002 | const char *symbol, asection *sec) | |
15003 | { | |
487b6440 | 15004 | struct elf_link_hash_entry *h; |
7dba9362 | 15005 | |
487b6440 AM |
15006 | h = elf_link_hash_lookup (elf_hash_table (info), symbol, |
15007 | FALSE, FALSE, TRUE); | |
e1b5d517 | 15008 | /* NB: Common symbols will be turned into definition later. */ |
487b6440 AM |
15009 | if (h != NULL |
15010 | && (h->root.type == bfd_link_hash_undefined | |
15011 | || h->root.type == bfd_link_hash_undefweak | |
e1b5d517 L |
15012 | || ((h->ref_regular || h->def_dynamic) |
15013 | && !h->def_regular | |
15014 | && h->root.type != bfd_link_hash_common))) | |
7dba9362 | 15015 | { |
bf3077a6 | 15016 | bfd_boolean was_dynamic = h->ref_dynamic || h->def_dynamic; |
e1b5d517 | 15017 | h->verinfo.verdef = NULL; |
487b6440 AM |
15018 | h->root.type = bfd_link_hash_defined; |
15019 | h->root.u.def.section = sec; | |
15020 | h->root.u.def.value = 0; | |
15021 | h->def_regular = 1; | |
15022 | h->def_dynamic = 0; | |
15023 | h->start_stop = 1; | |
15024 | h->u2.start_stop_section = sec; | |
15025 | if (symbol[0] == '.') | |
15026 | { | |
15027 | /* .startof. and .sizeof. symbols are local. */ | |
559192d8 AM |
15028 | const struct elf_backend_data *bed; |
15029 | bed = get_elf_backend_data (info->output_bfd); | |
15030 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
487b6440 | 15031 | } |
36b8fda5 AM |
15032 | else |
15033 | { | |
15034 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
cae64165 RM |
15035 | h->other = ((h->other & ~ELF_ST_VISIBILITY (-1)) |
15036 | | info->start_stop_visibility); | |
bf3077a6 | 15037 | if (was_dynamic) |
36b8fda5 AM |
15038 | bfd_elf_link_record_dynamic_symbol (info, h); |
15039 | } | |
487b6440 | 15040 | return &h->root; |
7dba9362 | 15041 | } |
487b6440 | 15042 | return NULL; |
7dba9362 | 15043 | } |
5dbc8b37 L |
15044 | |
15045 | /* Find dynamic relocs for H that apply to read-only sections. */ | |
15046 | ||
15047 | asection * | |
15048 | _bfd_elf_readonly_dynrelocs (struct elf_link_hash_entry *h) | |
15049 | { | |
15050 | struct elf_dyn_relocs *p; | |
15051 | ||
15052 | for (p = h->dyn_relocs; p != NULL; p = p->next) | |
15053 | { | |
15054 | asection *s = p->sec->output_section; | |
15055 | ||
15056 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
15057 | return p->sec; | |
15058 | } | |
15059 | return NULL; | |
15060 | } | |
d49e5065 L |
15061 | |
15062 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to | |
15063 | read-only sections. */ | |
15064 | ||
15065 | bfd_boolean | |
15066 | _bfd_elf_maybe_set_textrel (struct elf_link_hash_entry *h, void *inf) | |
15067 | { | |
15068 | asection *sec; | |
15069 | ||
15070 | if (h->root.type == bfd_link_hash_indirect) | |
15071 | return TRUE; | |
15072 | ||
15073 | sec = _bfd_elf_readonly_dynrelocs (h); | |
15074 | if (sec != NULL) | |
15075 | { | |
15076 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
15077 | ||
15078 | info->flags |= DF_TEXTREL; | |
15079 | /* xgettext:c-format */ | |
15080 | info->callbacks->minfo (_("%pB: dynamic relocation against `%pT' " | |
15081 | "in read-only section `%pA'\n"), | |
15082 | sec->owner, h->root.root.string, sec); | |
15083 | ||
15084 | if (bfd_link_textrel_check (info)) | |
15085 | /* xgettext:c-format */ | |
15086 | info->callbacks->einfo (_("%P: %pB: warning: relocation against `%s' " | |
15087 | "in read-only section `%pA'\n"), | |
15088 | sec->owner, h->root.root.string, sec); | |
15089 | ||
15090 | /* Not an error, just cut short the traversal. */ | |
15091 | return FALSE; | |
15092 | } | |
15093 | return TRUE; | |
15094 | } | |
3084d7a2 L |
15095 | |
15096 | /* Add dynamic tags. */ | |
15097 | ||
15098 | bfd_boolean | |
15099 | _bfd_elf_add_dynamic_tags (bfd *output_bfd, struct bfd_link_info *info, | |
15100 | bfd_boolean need_dynamic_reloc) | |
15101 | { | |
15102 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
15103 | ||
15104 | if (htab->dynamic_sections_created) | |
15105 | { | |
15106 | /* Add some entries to the .dynamic section. We fill in the | |
15107 | values later, in finish_dynamic_sections, but we must add | |
15108 | the entries now so that we get the correct size for the | |
15109 | .dynamic section. The DT_DEBUG entry is filled in by the | |
15110 | dynamic linker and used by the debugger. */ | |
15111 | #define add_dynamic_entry(TAG, VAL) \ | |
15112 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
15113 | ||
15114 | const struct elf_backend_data *bed | |
15115 | = get_elf_backend_data (output_bfd); | |
15116 | ||
15117 | if (bfd_link_executable (info)) | |
15118 | { | |
15119 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
15120 | return FALSE; | |
15121 | } | |
15122 | ||
15123 | if (htab->dt_pltgot_required || htab->splt->size != 0) | |
15124 | { | |
15125 | /* DT_PLTGOT is used by prelink even if there is no PLT | |
15126 | relocation. */ | |
15127 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
15128 | return FALSE; | |
15129 | } | |
15130 | ||
15131 | if (htab->dt_jmprel_required || htab->srelplt->size != 0) | |
15132 | { | |
15133 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
15134 | || !add_dynamic_entry (DT_PLTREL, | |
15135 | (bed->rela_plts_and_copies_p | |
15136 | ? DT_RELA : DT_REL)) | |
15137 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
15138 | return FALSE; | |
15139 | } | |
15140 | ||
15141 | if (htab->tlsdesc_plt | |
15142 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
15143 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
15144 | return FALSE; | |
15145 | ||
15146 | if (need_dynamic_reloc) | |
15147 | { | |
15148 | if (bed->rela_plts_and_copies_p) | |
15149 | { | |
15150 | if (!add_dynamic_entry (DT_RELA, 0) | |
15151 | || !add_dynamic_entry (DT_RELASZ, 0) | |
15152 | || !add_dynamic_entry (DT_RELAENT, | |
15153 | bed->s->sizeof_rela)) | |
15154 | return FALSE; | |
15155 | } | |
15156 | else | |
15157 | { | |
15158 | if (!add_dynamic_entry (DT_REL, 0) | |
15159 | || !add_dynamic_entry (DT_RELSZ, 0) | |
15160 | || !add_dynamic_entry (DT_RELENT, | |
15161 | bed->s->sizeof_rel)) | |
15162 | return FALSE; | |
15163 | } | |
15164 | ||
15165 | /* If any dynamic relocs apply to a read-only section, | |
15166 | then we need a DT_TEXTREL entry. */ | |
15167 | if ((info->flags & DF_TEXTREL) == 0) | |
15168 | elf_link_hash_traverse (htab, _bfd_elf_maybe_set_textrel, | |
15169 | info); | |
15170 | ||
15171 | if ((info->flags & DF_TEXTREL) != 0) | |
15172 | { | |
15173 | if (htab->ifunc_resolvers) | |
15174 | info->callbacks->einfo | |
15175 | (_("%P: warning: GNU indirect functions with DT_TEXTREL " | |
15176 | "may result in a segfault at runtime; recompile with %s\n"), | |
15177 | bfd_link_dll (info) ? "-fPIC" : "-fPIE"); | |
15178 | ||
15179 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
15180 | return FALSE; | |
15181 | } | |
15182 | } | |
15183 | } | |
15184 | #undef add_dynamic_entry | |
15185 | ||
15186 | return TRUE; | |
15187 | } |