Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* ELF linking support for BFD. |
250d07de | 2 | Copyright (C) 1995-2021 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; | |
0a1b45a2 | 48 | bool failed; |
28caa186 AM |
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. */ | |
0a1b45a2 | 61 | bool failed; |
28caa186 AM |
62 | }; |
63 | ||
0a1b45a2 | 64 | static bool _bfd_elf_fix_symbol_flags |
28caa186 AM |
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, | |
0a1b45a2 | 70 | bool discard) |
2f0c68f2 CM |
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 | 119 | |
0a1b45a2 | 120 | h = elf_link_hash_lookup (elf_hash_table (info), name, false, false, false); |
d98685ac AM |
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, |
0a1b45a2 | 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 | |
0a1b45a2 | 147 | (*bed->elf_backend_hide_symbol) (info, h, true); |
d98685ac AM |
148 | return h; |
149 | } | |
150 | ||
0a1b45a2 | 151 | bool |
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) |
0a1b45a2 | 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)) |
0a1b45a2 | 173 | return false; |
6de2ae4a | 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)) |
0a1b45a2 | 179 | return false; |
64e77c6d L |
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)) |
0a1b45a2 | 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 | 203 | if (h == NULL) |
0a1b45a2 | 204 | return false; |
2517a57f | 205 | } |
252b5132 | 206 | |
0a1b45a2 | 207 | return true; |
252b5132 RH |
208 | } |
209 | \f | |
7e9f0867 | 210 | /* Create a strtab to hold the dynamic symbol names. */ |
0a1b45a2 | 211 | static bool |
7e9f0867 AM |
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) | |
0a1b45a2 | 246 | return false; |
7e9f0867 | 247 | } |
0a1b45a2 | 248 | return true; |
7e9f0867 AM |
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 | |
0a1b45a2 | 258 | bool |
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)) |
0a1b45a2 | 267 | return false; |
45d6a902 AM |
268 | |
269 | if (elf_hash_table (info)->dynamic_sections_created) | |
0a1b45a2 | 270 | return true; |
45d6a902 | 271 | |
7e9f0867 | 272 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
0a1b45a2 | 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) |
0a1b45a2 | 287 | return false; |
45d6a902 | 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)) |
0a1b45a2 | 296 | return false; |
45d6a902 | 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)) |
0a1b45a2 | 302 | return false; |
45d6a902 | 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)) |
0a1b45a2 | 308 | return false; |
45d6a902 | 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)) |
0a1b45a2 | 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) |
0a1b45a2 | 320 | return false; |
45d6a902 | 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)) |
0a1b45a2 | 325 | return false; |
45d6a902 AM |
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) | |
0a1b45a2 | 336 | return false; |
45d6a902 | 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)) |
0a1b45a2 | 344 | return false; |
fdc90cb4 JJ |
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)) |
0a1b45a2 | 354 | return false; |
fdc90cb4 JJ |
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)) | |
0a1b45a2 | 369 | return false; |
45d6a902 | 370 | |
0a1b45a2 | 371 | elf_hash_table (info)->dynamic_sections_created = true; |
45d6a902 | 372 | |
0a1b45a2 | 373 | return true; |
45d6a902 AM |
374 | } |
375 | ||
376 | /* Create dynamic sections when linking against a dynamic object. */ | |
377 | ||
0a1b45a2 | 378 | bool |
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)) |
0a1b45a2 | 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) | |
0a1b45a2 | 416 | return false; |
7325306f | 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)) |
0a1b45a2 | 425 | return false; |
6de2ae4a | 426 | htab->srelplt = s; |
252b5132 RH |
427 | |
428 | if (! _bfd_elf_create_got_section (abfd, info)) | |
0a1b45a2 | 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) |
0a1b45a2 | 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 | 452 | if (s == NULL) |
0a1b45a2 | 453 | return false; |
5474d94f AM |
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)) |
0a1b45a2 | 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)) |
0a1b45a2 | 487 | return false; |
5474d94f AM |
488 | htab->sreldynrelro = s; |
489 | } | |
3018b441 | 490 | } |
252b5132 RH |
491 | } |
492 | ||
0a1b45a2 | 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 | ||
0a1b45a2 | 504 | bool |
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) | |
0a1b45a2 | 522 | return true; |
a896df97 AM |
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; |
c8bad65e AM |
537 | if (!elf_hash_table (info)->is_relocatable_executable |
538 | || ((h->root.type == bfd_link_hash_defined | |
539 | || h->root.type == bfd_link_hash_defweak) | |
c4566785 | 540 | && h->root.u.def.section->owner != NULL |
c8bad65e AM |
541 | && h->root.u.def.section->owner->no_export) |
542 | || (h->root.type == bfd_link_hash_common | |
c4566785 | 543 | && h->root.u.c.p->section->owner != NULL |
c8bad65e | 544 | && h->root.u.c.p->section->owner->no_export)) |
0a1b45a2 | 545 | return true; |
7a13edea | 546 | } |
0444bdd4 | 547 | |
7a13edea NC |
548 | default: |
549 | break; | |
550 | } | |
551 | ||
252b5132 RH |
552 | h->dynindx = elf_hash_table (info)->dynsymcount; |
553 | ++elf_hash_table (info)->dynsymcount; | |
554 | ||
555 | dynstr = elf_hash_table (info)->dynstr; | |
556 | if (dynstr == NULL) | |
557 | { | |
558 | /* Create a strtab to hold the dynamic symbol names. */ | |
2b0f7ef9 | 559 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); |
252b5132 | 560 | if (dynstr == NULL) |
0a1b45a2 | 561 | return false; |
252b5132 RH |
562 | } |
563 | ||
564 | /* We don't put any version information in the dynamic string | |
aad5d350 | 565 | table. */ |
252b5132 RH |
566 | name = h->root.root.string; |
567 | p = strchr (name, ELF_VER_CHR); | |
68b6ddd0 AM |
568 | if (p != NULL) |
569 | /* We know that the p points into writable memory. In fact, | |
570 | there are only a few symbols that have read-only names, being | |
571 | those like _GLOBAL_OFFSET_TABLE_ that are created specially | |
572 | by the backends. Most symbols will have names pointing into | |
573 | an ELF string table read from a file, or to objalloc memory. */ | |
574 | *p = 0; | |
575 | ||
576 | indx = _bfd_elf_strtab_add (dynstr, name, p != NULL); | |
577 | ||
578 | if (p != NULL) | |
579 | *p = ELF_VER_CHR; | |
252b5132 | 580 | |
ef53be89 | 581 | if (indx == (size_t) -1) |
0a1b45a2 | 582 | return false; |
252b5132 RH |
583 | h->dynstr_index = indx; |
584 | } | |
585 | ||
0a1b45a2 | 586 | return true; |
252b5132 | 587 | } |
45d6a902 | 588 | \f |
55255dae L |
589 | /* Mark a symbol dynamic. */ |
590 | ||
28caa186 | 591 | static void |
55255dae | 592 | bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info *info, |
40b36307 L |
593 | struct elf_link_hash_entry *h, |
594 | Elf_Internal_Sym *sym) | |
55255dae | 595 | { |
40b36307 | 596 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
55255dae | 597 | |
40b36307 | 598 | /* It may be called more than once on the same H. */ |
0e1862bb | 599 | if(h->dynamic || bfd_link_relocatable (info)) |
55255dae L |
600 | return; |
601 | ||
40b36307 L |
602 | if ((info->dynamic_data |
603 | && (h->type == STT_OBJECT | |
b8871f35 | 604 | || h->type == STT_COMMON |
40b36307 | 605 | || (sym != NULL |
b8871f35 L |
606 | && (ELF_ST_TYPE (sym->st_info) == STT_OBJECT |
607 | || ELF_ST_TYPE (sym->st_info) == STT_COMMON)))) | |
a0c8462f | 608 | || (d != NULL |
73ec947d | 609 | && h->non_elf |
40b36307 | 610 | && (*d->match) (&d->head, NULL, h->root.root.string))) |
416c34d6 L |
611 | { |
612 | h->dynamic = 1; | |
613 | /* NB: If a symbol is made dynamic by --dynamic-list, it has | |
614 | non-IR reference. */ | |
615 | h->root.non_ir_ref_dynamic = 1; | |
616 | } | |
55255dae L |
617 | } |
618 | ||
45d6a902 AM |
619 | /* Record an assignment to a symbol made by a linker script. We need |
620 | this in case some dynamic object refers to this symbol. */ | |
621 | ||
0a1b45a2 | 622 | bool |
fe21a8fc L |
623 | bfd_elf_record_link_assignment (bfd *output_bfd, |
624 | struct bfd_link_info *info, | |
268b6b39 | 625 | const char *name, |
0a1b45a2 AM |
626 | bool provide, |
627 | bool hidden) | |
45d6a902 | 628 | { |
00cbee0a | 629 | struct elf_link_hash_entry *h, *hv; |
4ea42fb7 | 630 | struct elf_link_hash_table *htab; |
00cbee0a | 631 | const struct elf_backend_data *bed; |
45d6a902 | 632 | |
0eddce27 | 633 | if (!is_elf_hash_table (info->hash)) |
0a1b45a2 | 634 | return true; |
45d6a902 | 635 | |
4ea42fb7 | 636 | htab = elf_hash_table (info); |
0a1b45a2 | 637 | h = elf_link_hash_lookup (htab, name, !provide, true, false); |
45d6a902 | 638 | if (h == NULL) |
4ea42fb7 | 639 | return provide; |
45d6a902 | 640 | |
8e2a4f11 AM |
641 | if (h->root.type == bfd_link_hash_warning) |
642 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
643 | ||
0f550b3d L |
644 | if (h->versioned == unknown) |
645 | { | |
646 | /* Set versioned if symbol version is unknown. */ | |
647 | char *version = strrchr (name, ELF_VER_CHR); | |
648 | if (version) | |
649 | { | |
650 | if (version > name && version[-1] != ELF_VER_CHR) | |
651 | h->versioned = versioned_hidden; | |
652 | else | |
653 | h->versioned = versioned; | |
654 | } | |
655 | } | |
656 | ||
73ec947d AM |
657 | /* Symbols defined in a linker script but not referenced anywhere |
658 | else will have non_elf set. */ | |
659 | if (h->non_elf) | |
660 | { | |
661 | bfd_elf_link_mark_dynamic_symbol (info, h, NULL); | |
662 | h->non_elf = 0; | |
663 | } | |
664 | ||
00cbee0a | 665 | switch (h->root.type) |
77cfaee6 | 666 | { |
00cbee0a L |
667 | case bfd_link_hash_defined: |
668 | case bfd_link_hash_defweak: | |
669 | case bfd_link_hash_common: | |
670 | break; | |
671 | case bfd_link_hash_undefweak: | |
672 | case bfd_link_hash_undefined: | |
673 | /* Since we're defining the symbol, don't let it seem to have not | |
674 | been defined. record_dynamic_symbol and size_dynamic_sections | |
675 | may depend on this. */ | |
4ea42fb7 | 676 | h->root.type = bfd_link_hash_new; |
77cfaee6 AM |
677 | if (h->root.u.undef.next != NULL || htab->root.undefs_tail == &h->root) |
678 | bfd_link_repair_undef_list (&htab->root); | |
00cbee0a L |
679 | break; |
680 | case bfd_link_hash_new: | |
00cbee0a L |
681 | break; |
682 | case bfd_link_hash_indirect: | |
683 | /* We had a versioned symbol in a dynamic library. We make the | |
a0c8462f | 684 | the versioned symbol point to this one. */ |
00cbee0a L |
685 | bed = get_elf_backend_data (output_bfd); |
686 | hv = h; | |
687 | while (hv->root.type == bfd_link_hash_indirect | |
688 | || hv->root.type == bfd_link_hash_warning) | |
689 | hv = (struct elf_link_hash_entry *) hv->root.u.i.link; | |
690 | /* We don't need to update h->root.u since linker will set them | |
691 | later. */ | |
692 | h->root.type = bfd_link_hash_undefined; | |
693 | hv->root.type = bfd_link_hash_indirect; | |
694 | hv->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
695 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hv); | |
696 | break; | |
8e2a4f11 AM |
697 | default: |
698 | BFD_FAIL (); | |
0a1b45a2 | 699 | return false; |
55255dae | 700 | } |
45d6a902 AM |
701 | |
702 | /* If this symbol is being provided by the linker script, and it is | |
703 | currently defined by a dynamic object, but not by a regular | |
704 | object, then mark it as undefined so that the generic linker will | |
705 | force the correct value. */ | |
706 | if (provide | |
f5385ebf AM |
707 | && h->def_dynamic |
708 | && !h->def_regular) | |
45d6a902 AM |
709 | h->root.type = bfd_link_hash_undefined; |
710 | ||
48e30f52 L |
711 | /* If this symbol is currently defined by a dynamic object, but not |
712 | by a regular object, then clear out any version information because | |
713 | the symbol will not be associated with the dynamic object any | |
714 | more. */ | |
715 | if (h->def_dynamic && !h->def_regular) | |
b531344c MR |
716 | h->verinfo.verdef = NULL; |
717 | ||
718 | /* Make sure this symbol is not garbage collected. */ | |
719 | h->mark = 1; | |
45d6a902 | 720 | |
f5385ebf | 721 | h->def_regular = 1; |
45d6a902 | 722 | |
eb8476a6 | 723 | if (hidden) |
fe21a8fc | 724 | { |
91d6fa6a | 725 | bed = get_elf_backend_data (output_bfd); |
b8297068 AM |
726 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
727 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
0a1b45a2 | 728 | (*bed->elf_backend_hide_symbol) (info, h, true); |
fe21a8fc L |
729 | } |
730 | ||
6fa3860b PB |
731 | /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects |
732 | and executables. */ | |
0e1862bb | 733 | if (!bfd_link_relocatable (info) |
6fa3860b PB |
734 | && h->dynindx != -1 |
735 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
736 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) | |
737 | h->forced_local = 1; | |
738 | ||
f5385ebf AM |
739 | if ((h->def_dynamic |
740 | || h->ref_dynamic | |
6b3b0ab8 L |
741 | || bfd_link_dll (info) |
742 | || elf_hash_table (info)->is_relocatable_executable) | |
34a87bb0 | 743 | && !h->forced_local |
45d6a902 AM |
744 | && h->dynindx == -1) |
745 | { | |
c152c796 | 746 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
0a1b45a2 | 747 | return false; |
45d6a902 AM |
748 | |
749 | /* If this is a weak defined symbol, and we know a corresponding | |
750 | real symbol from the same dynamic object, make sure the real | |
751 | symbol is also made into a dynamic symbol. */ | |
60d67dc8 | 752 | if (h->is_weakalias) |
45d6a902 | 753 | { |
60d67dc8 AM |
754 | struct elf_link_hash_entry *def = weakdef (h); |
755 | ||
756 | if (def->dynindx == -1 | |
757 | && !bfd_elf_link_record_dynamic_symbol (info, def)) | |
0a1b45a2 | 758 | return false; |
45d6a902 AM |
759 | } |
760 | } | |
761 | ||
0a1b45a2 | 762 | return true; |
45d6a902 | 763 | } |
42751cf3 | 764 | |
8c58d23b AM |
765 | /* Record a new local dynamic symbol. Returns 0 on failure, 1 on |
766 | success, and 2 on a failure caused by attempting to record a symbol | |
767 | in a discarded section, eg. a discarded link-once section symbol. */ | |
768 | ||
769 | int | |
c152c796 AM |
770 | bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info *info, |
771 | bfd *input_bfd, | |
772 | long input_indx) | |
8c58d23b | 773 | { |
986f0783 | 774 | size_t amt; |
8c58d23b AM |
775 | struct elf_link_local_dynamic_entry *entry; |
776 | struct elf_link_hash_table *eht; | |
777 | struct elf_strtab_hash *dynstr; | |
ef53be89 | 778 | size_t dynstr_index; |
8c58d23b AM |
779 | char *name; |
780 | Elf_External_Sym_Shndx eshndx; | |
781 | char esym[sizeof (Elf64_External_Sym)]; | |
782 | ||
0eddce27 | 783 | if (! is_elf_hash_table (info->hash)) |
8c58d23b AM |
784 | return 0; |
785 | ||
786 | /* See if the entry exists already. */ | |
787 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
788 | if (entry->input_bfd == input_bfd && entry->input_indx == input_indx) | |
789 | return 1; | |
790 | ||
791 | amt = sizeof (*entry); | |
a50b1753 | 792 | entry = (struct elf_link_local_dynamic_entry *) bfd_alloc (input_bfd, amt); |
8c58d23b AM |
793 | if (entry == NULL) |
794 | return 0; | |
795 | ||
796 | /* Go find the symbol, so that we can find it's name. */ | |
797 | if (!bfd_elf_get_elf_syms (input_bfd, &elf_tdata (input_bfd)->symtab_hdr, | |
268b6b39 | 798 | 1, input_indx, &entry->isym, esym, &eshndx)) |
8c58d23b AM |
799 | { |
800 | bfd_release (input_bfd, entry); | |
801 | return 0; | |
802 | } | |
803 | ||
804 | if (entry->isym.st_shndx != SHN_UNDEF | |
4fbb74a6 | 805 | && entry->isym.st_shndx < SHN_LORESERVE) |
8c58d23b AM |
806 | { |
807 | asection *s; | |
808 | ||
809 | s = bfd_section_from_elf_index (input_bfd, entry->isym.st_shndx); | |
810 | if (s == NULL || bfd_is_abs_section (s->output_section)) | |
811 | { | |
812 | /* We can still bfd_release here as nothing has done another | |
813 | bfd_alloc. We can't do this later in this function. */ | |
814 | bfd_release (input_bfd, entry); | |
815 | return 2; | |
816 | } | |
817 | } | |
818 | ||
819 | name = (bfd_elf_string_from_elf_section | |
820 | (input_bfd, elf_tdata (input_bfd)->symtab_hdr.sh_link, | |
821 | entry->isym.st_name)); | |
822 | ||
823 | dynstr = elf_hash_table (info)->dynstr; | |
824 | if (dynstr == NULL) | |
825 | { | |
826 | /* Create a strtab to hold the dynamic symbol names. */ | |
827 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); | |
828 | if (dynstr == NULL) | |
829 | return 0; | |
830 | } | |
831 | ||
0a1b45a2 | 832 | dynstr_index = _bfd_elf_strtab_add (dynstr, name, false); |
ef53be89 | 833 | if (dynstr_index == (size_t) -1) |
8c58d23b AM |
834 | return 0; |
835 | entry->isym.st_name = dynstr_index; | |
836 | ||
837 | eht = elf_hash_table (info); | |
838 | ||
839 | entry->next = eht->dynlocal; | |
840 | eht->dynlocal = entry; | |
841 | entry->input_bfd = input_bfd; | |
842 | entry->input_indx = input_indx; | |
843 | eht->dynsymcount++; | |
844 | ||
845 | /* Whatever binding the symbol had before, it's now local. */ | |
846 | entry->isym.st_info | |
847 | = ELF_ST_INFO (STB_LOCAL, ELF_ST_TYPE (entry->isym.st_info)); | |
848 | ||
849 | /* The dynindx will be set at the end of size_dynamic_sections. */ | |
850 | ||
851 | return 1; | |
852 | } | |
853 | ||
30b30c21 | 854 | /* Return the dynindex of a local dynamic symbol. */ |
42751cf3 | 855 | |
30b30c21 | 856 | long |
268b6b39 AM |
857 | _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info *info, |
858 | bfd *input_bfd, | |
859 | long input_indx) | |
30b30c21 RH |
860 | { |
861 | struct elf_link_local_dynamic_entry *e; | |
862 | ||
863 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
864 | if (e->input_bfd == input_bfd && e->input_indx == input_indx) | |
865 | return e->dynindx; | |
866 | return -1; | |
867 | } | |
868 | ||
869 | /* This function is used to renumber the dynamic symbols, if some of | |
870 | them are removed because they are marked as local. This is called | |
871 | via elf_link_hash_traverse. */ | |
872 | ||
0a1b45a2 | 873 | static bool |
268b6b39 AM |
874 | elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry *h, |
875 | void *data) | |
42751cf3 | 876 | { |
a50b1753 | 877 | size_t *count = (size_t *) data; |
30b30c21 | 878 | |
6fa3860b | 879 | if (h->forced_local) |
0a1b45a2 | 880 | return true; |
6fa3860b PB |
881 | |
882 | if (h->dynindx != -1) | |
883 | h->dynindx = ++(*count); | |
884 | ||
0a1b45a2 | 885 | return true; |
6fa3860b PB |
886 | } |
887 | ||
888 | ||
889 | /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with | |
890 | STB_LOCAL binding. */ | |
891 | ||
0a1b45a2 | 892 | static bool |
6fa3860b PB |
893 | elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry *h, |
894 | void *data) | |
895 | { | |
a50b1753 | 896 | size_t *count = (size_t *) data; |
6fa3860b | 897 | |
6fa3860b | 898 | if (!h->forced_local) |
0a1b45a2 | 899 | return true; |
6fa3860b | 900 | |
42751cf3 | 901 | if (h->dynindx != -1) |
30b30c21 RH |
902 | h->dynindx = ++(*count); |
903 | ||
0a1b45a2 | 904 | return true; |
42751cf3 | 905 | } |
30b30c21 | 906 | |
aee6f5b4 AO |
907 | /* Return true if the dynamic symbol for a given section should be |
908 | omitted when creating a shared library. */ | |
0a1b45a2 | 909 | bool |
d00dd7dc AM |
910 | _bfd_elf_omit_section_dynsym_default (bfd *output_bfd ATTRIBUTE_UNUSED, |
911 | struct bfd_link_info *info, | |
912 | asection *p) | |
aee6f5b4 | 913 | { |
74541ad4 | 914 | struct elf_link_hash_table *htab; |
ca55926c | 915 | asection *ip; |
74541ad4 | 916 | |
aee6f5b4 AO |
917 | switch (elf_section_data (p)->this_hdr.sh_type) |
918 | { | |
919 | case SHT_PROGBITS: | |
920 | case SHT_NOBITS: | |
921 | /* If sh_type is yet undecided, assume it could be | |
922 | SHT_PROGBITS/SHT_NOBITS. */ | |
923 | case SHT_NULL: | |
74541ad4 | 924 | htab = elf_hash_table (info); |
74541ad4 AM |
925 | if (htab->text_index_section != NULL) |
926 | return p != htab->text_index_section && p != htab->data_index_section; | |
927 | ||
ca55926c | 928 | return (htab->dynobj != NULL |
3d4d4302 | 929 | && (ip = bfd_get_linker_section (htab->dynobj, p->name)) != NULL |
ca55926c | 930 | && ip->output_section == p); |
aee6f5b4 AO |
931 | |
932 | /* There shouldn't be section relative relocations | |
933 | against any other section. */ | |
934 | default: | |
0a1b45a2 | 935 | return true; |
aee6f5b4 AO |
936 | } |
937 | } | |
938 | ||
0a1b45a2 | 939 | bool |
d00dd7dc AM |
940 | _bfd_elf_omit_section_dynsym_all |
941 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
942 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
943 | asection *p ATTRIBUTE_UNUSED) | |
944 | { | |
0a1b45a2 | 945 | return true; |
d00dd7dc AM |
946 | } |
947 | ||
062e2358 | 948 | /* Assign dynsym indices. In a shared library we generate a section |
6fa3860b PB |
949 | symbol for each output section, which come first. Next come symbols |
950 | which have been forced to local binding. Then all of the back-end | |
951 | allocated local dynamic syms, followed by the rest of the global | |
63f452a8 AM |
952 | symbols. If SECTION_SYM_COUNT is NULL, section dynindx is not set. |
953 | (This prevents the early call before elf_backend_init_index_section | |
954 | and strip_excluded_output_sections setting dynindx for sections | |
955 | that are stripped.) */ | |
30b30c21 | 956 | |
554220db AM |
957 | static unsigned long |
958 | _bfd_elf_link_renumber_dynsyms (bfd *output_bfd, | |
959 | struct bfd_link_info *info, | |
960 | unsigned long *section_sym_count) | |
30b30c21 RH |
961 | { |
962 | unsigned long dynsymcount = 0; | |
0a1b45a2 | 963 | bool do_sec = section_sym_count != NULL; |
30b30c21 | 964 | |
0e1862bb L |
965 | if (bfd_link_pic (info) |
966 | || elf_hash_table (info)->is_relocatable_executable) | |
30b30c21 | 967 | { |
aee6f5b4 | 968 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
30b30c21 RH |
969 | asection *p; |
970 | for (p = output_bfd->sections; p ; p = p->next) | |
8c37241b | 971 | if ((p->flags & SEC_EXCLUDE) == 0 |
aee6f5b4 | 972 | && (p->flags & SEC_ALLOC) != 0 |
7f923b7f | 973 | && elf_hash_table (info)->dynamic_relocs |
aee6f5b4 | 974 | && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) |
63f452a8 AM |
975 | { |
976 | ++dynsymcount; | |
977 | if (do_sec) | |
978 | elf_section_data (p)->dynindx = dynsymcount; | |
979 | } | |
980 | else if (do_sec) | |
74541ad4 | 981 | elf_section_data (p)->dynindx = 0; |
30b30c21 | 982 | } |
63f452a8 AM |
983 | if (do_sec) |
984 | *section_sym_count = dynsymcount; | |
30b30c21 | 985 | |
6fa3860b PB |
986 | elf_link_hash_traverse (elf_hash_table (info), |
987 | elf_link_renumber_local_hash_table_dynsyms, | |
988 | &dynsymcount); | |
989 | ||
30b30c21 RH |
990 | if (elf_hash_table (info)->dynlocal) |
991 | { | |
992 | struct elf_link_local_dynamic_entry *p; | |
993 | for (p = elf_hash_table (info)->dynlocal; p ; p = p->next) | |
994 | p->dynindx = ++dynsymcount; | |
995 | } | |
90ac2420 | 996 | elf_hash_table (info)->local_dynsymcount = dynsymcount; |
30b30c21 RH |
997 | |
998 | elf_link_hash_traverse (elf_hash_table (info), | |
999 | elf_link_renumber_hash_table_dynsyms, | |
1000 | &dynsymcount); | |
1001 | ||
d5486c43 L |
1002 | /* There is an unused NULL entry at the head of the table which we |
1003 | must account for in our count even if the table is empty since it | |
1004 | is intended for the mandatory DT_SYMTAB tag (.dynsym section) in | |
1005 | .dynamic section. */ | |
1006 | dynsymcount++; | |
30b30c21 | 1007 | |
ccabcbe5 AM |
1008 | elf_hash_table (info)->dynsymcount = dynsymcount; |
1009 | return dynsymcount; | |
30b30c21 | 1010 | } |
252b5132 | 1011 | |
54ac0771 L |
1012 | /* Merge st_other field. */ |
1013 | ||
1014 | static void | |
1015 | elf_merge_st_other (bfd *abfd, struct elf_link_hash_entry *h, | |
5160d0f3 | 1016 | unsigned int st_other, asection *sec, |
0a1b45a2 | 1017 | bool definition, bool dynamic) |
54ac0771 L |
1018 | { |
1019 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1020 | ||
1021 | /* If st_other has a processor-specific meaning, specific | |
cd3416da | 1022 | code might be needed here. */ |
54ac0771 | 1023 | if (bed->elf_backend_merge_symbol_attribute) |
5160d0f3 | 1024 | (*bed->elf_backend_merge_symbol_attribute) (h, st_other, definition, |
54ac0771 L |
1025 | dynamic); |
1026 | ||
cd3416da | 1027 | if (!dynamic) |
54ac0771 | 1028 | { |
5160d0f3 | 1029 | unsigned symvis = ELF_ST_VISIBILITY (st_other); |
cd3416da | 1030 | unsigned hvis = ELF_ST_VISIBILITY (h->other); |
54ac0771 | 1031 | |
cd3416da AM |
1032 | /* Keep the most constraining visibility. Leave the remainder |
1033 | of the st_other field to elf_backend_merge_symbol_attribute. */ | |
1034 | if (symvis - 1 < hvis - 1) | |
1035 | h->other = symvis | (h->other & ~ELF_ST_VISIBILITY (-1)); | |
54ac0771 | 1036 | } |
b8417128 | 1037 | else if (definition |
5160d0f3 | 1038 | && ELF_ST_VISIBILITY (st_other) != STV_DEFAULT |
b8417128 | 1039 | && (sec->flags & SEC_READONLY) == 0) |
6cabe1ea | 1040 | h->protected_def = 1; |
54ac0771 L |
1041 | } |
1042 | ||
4f3fedcf AM |
1043 | /* This function is called when we want to merge a new symbol with an |
1044 | existing symbol. It handles the various cases which arise when we | |
1045 | find a definition in a dynamic object, or when there is already a | |
1046 | definition in a dynamic object. The new symbol is described by | |
1047 | NAME, SYM, PSEC, and PVALUE. We set SYM_HASH to the hash table | |
1048 | entry. We set POLDBFD to the old symbol's BFD. We set POLD_WEAK | |
1049 | if the old symbol was weak. We set POLD_ALIGNMENT to the alignment | |
1050 | of an old common symbol. We set OVERRIDE if the old symbol is | |
1051 | overriding a new definition. We set TYPE_CHANGE_OK if it is OK for | |
1052 | the type to change. We set SIZE_CHANGE_OK if it is OK for the size | |
1053 | to change. By OK to change, we mean that we shouldn't warn if the | |
1054 | type or size does change. */ | |
45d6a902 | 1055 | |
0a1b45a2 | 1056 | static bool |
268b6b39 AM |
1057 | _bfd_elf_merge_symbol (bfd *abfd, |
1058 | struct bfd_link_info *info, | |
1059 | const char *name, | |
1060 | Elf_Internal_Sym *sym, | |
1061 | asection **psec, | |
1062 | bfd_vma *pvalue, | |
4f3fedcf AM |
1063 | struct elf_link_hash_entry **sym_hash, |
1064 | bfd **poldbfd, | |
0a1b45a2 | 1065 | bool *pold_weak, |
af44c138 | 1066 | unsigned int *pold_alignment, |
0a1b45a2 | 1067 | bool *skip, |
7ba11550 | 1068 | bfd **override, |
0a1b45a2 AM |
1069 | bool *type_change_ok, |
1070 | bool *size_change_ok, | |
1071 | bool *matched) | |
252b5132 | 1072 | { |
7479dfd4 | 1073 | asection *sec, *oldsec; |
45d6a902 | 1074 | struct elf_link_hash_entry *h; |
90c984fc | 1075 | struct elf_link_hash_entry *hi; |
45d6a902 AM |
1076 | struct elf_link_hash_entry *flip; |
1077 | int bind; | |
1078 | bfd *oldbfd; | |
0a1b45a2 AM |
1079 | bool newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon; |
1080 | bool newweak, oldweak, newfunc, oldfunc; | |
a4d8e49b | 1081 | const struct elf_backend_data *bed; |
6e33951e | 1082 | char *new_version; |
0a1b45a2 | 1083 | bool default_sym = *matched; |
45d6a902 | 1084 | |
0a1b45a2 | 1085 | *skip = false; |
7ba11550 | 1086 | *override = NULL; |
45d6a902 AM |
1087 | |
1088 | sec = *psec; | |
1089 | bind = ELF_ST_BIND (sym->st_info); | |
1090 | ||
1091 | if (! bfd_is_und_section (sec)) | |
0a1b45a2 | 1092 | h = elf_link_hash_lookup (elf_hash_table (info), name, true, false, false); |
45d6a902 AM |
1093 | else |
1094 | h = ((struct elf_link_hash_entry *) | |
0a1b45a2 | 1095 | bfd_wrapped_link_hash_lookup (abfd, info, name, true, false, false)); |
45d6a902 | 1096 | if (h == NULL) |
0a1b45a2 | 1097 | return false; |
45d6a902 | 1098 | *sym_hash = h; |
252b5132 | 1099 | |
88ba32a0 L |
1100 | bed = get_elf_backend_data (abfd); |
1101 | ||
6e33951e | 1102 | /* NEW_VERSION is the symbol version of the new symbol. */ |
422f1182 | 1103 | if (h->versioned != unversioned) |
6e33951e | 1104 | { |
422f1182 L |
1105 | /* Symbol version is unknown or versioned. */ |
1106 | new_version = strrchr (name, ELF_VER_CHR); | |
1107 | if (new_version) | |
1108 | { | |
1109 | if (h->versioned == unknown) | |
1110 | { | |
1111 | if (new_version > name && new_version[-1] != ELF_VER_CHR) | |
1112 | h->versioned = versioned_hidden; | |
1113 | else | |
1114 | h->versioned = versioned; | |
1115 | } | |
1116 | new_version += 1; | |
1117 | if (new_version[0] == '\0') | |
1118 | new_version = NULL; | |
1119 | } | |
1120 | else | |
1121 | h->versioned = unversioned; | |
6e33951e | 1122 | } |
422f1182 L |
1123 | else |
1124 | new_version = NULL; | |
6e33951e | 1125 | |
90c984fc L |
1126 | /* For merging, we only care about real symbols. But we need to make |
1127 | sure that indirect symbol dynamic flags are updated. */ | |
1128 | hi = h; | |
45d6a902 AM |
1129 | while (h->root.type == bfd_link_hash_indirect |
1130 | || h->root.type == bfd_link_hash_warning) | |
1131 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1132 | ||
6e33951e L |
1133 | if (!*matched) |
1134 | { | |
1135 | if (hi == h || h->root.type == bfd_link_hash_new) | |
0a1b45a2 | 1136 | *matched = true; |
6e33951e L |
1137 | else |
1138 | { | |
ae7683d2 | 1139 | /* OLD_HIDDEN is true if the existing symbol is only visible |
6e33951e | 1140 | to the symbol with the same symbol version. NEW_HIDDEN is |
ae7683d2 | 1141 | true if the new symbol is only visible to the symbol with |
6e33951e | 1142 | the same symbol version. */ |
0a1b45a2 AM |
1143 | bool old_hidden = h->versioned == versioned_hidden; |
1144 | bool new_hidden = hi->versioned == versioned_hidden; | |
6e33951e L |
1145 | if (!old_hidden && !new_hidden) |
1146 | /* The new symbol matches the existing symbol if both | |
1147 | aren't hidden. */ | |
0a1b45a2 | 1148 | *matched = true; |
6e33951e L |
1149 | else |
1150 | { | |
1151 | /* OLD_VERSION is the symbol version of the existing | |
1152 | symbol. */ | |
422f1182 L |
1153 | char *old_version; |
1154 | ||
1155 | if (h->versioned >= versioned) | |
1156 | old_version = strrchr (h->root.root.string, | |
1157 | ELF_VER_CHR) + 1; | |
1158 | else | |
1159 | old_version = NULL; | |
6e33951e L |
1160 | |
1161 | /* The new symbol matches the existing symbol if they | |
1162 | have the same symbol version. */ | |
1163 | *matched = (old_version == new_version | |
1164 | || (old_version != NULL | |
1165 | && new_version != NULL | |
1166 | && strcmp (old_version, new_version) == 0)); | |
1167 | } | |
1168 | } | |
1169 | } | |
1170 | ||
934bce08 AM |
1171 | /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the |
1172 | existing symbol. */ | |
1173 | ||
1174 | oldbfd = NULL; | |
1175 | oldsec = NULL; | |
1176 | switch (h->root.type) | |
1177 | { | |
1178 | default: | |
1179 | break; | |
1180 | ||
1181 | case bfd_link_hash_undefined: | |
1182 | case bfd_link_hash_undefweak: | |
1183 | oldbfd = h->root.u.undef.abfd; | |
1184 | break; | |
1185 | ||
1186 | case bfd_link_hash_defined: | |
1187 | case bfd_link_hash_defweak: | |
1188 | oldbfd = h->root.u.def.section->owner; | |
1189 | oldsec = h->root.u.def.section; | |
1190 | break; | |
1191 | ||
1192 | case bfd_link_hash_common: | |
1193 | oldbfd = h->root.u.c.p->section->owner; | |
1194 | oldsec = h->root.u.c.p->section; | |
1195 | if (pold_alignment) | |
1196 | *pold_alignment = h->root.u.c.p->alignment_power; | |
1197 | break; | |
1198 | } | |
1199 | if (poldbfd && *poldbfd == NULL) | |
1200 | *poldbfd = oldbfd; | |
1201 | ||
1202 | /* Differentiate strong and weak symbols. */ | |
1203 | newweak = bind == STB_WEAK; | |
1204 | oldweak = (h->root.type == bfd_link_hash_defweak | |
1205 | || h->root.type == bfd_link_hash_undefweak); | |
1206 | if (pold_weak) | |
1207 | *pold_weak = oldweak; | |
1208 | ||
40b36307 | 1209 | /* We have to check it for every instance since the first few may be |
ee659f1f | 1210 | references and not all compilers emit symbol type for undefined |
40b36307 L |
1211 | symbols. */ |
1212 | bfd_elf_link_mark_dynamic_symbol (info, h, sym); | |
1213 | ||
ee659f1f AM |
1214 | /* NEWDYN and OLDDYN indicate whether the new or old symbol, |
1215 | respectively, is from a dynamic object. */ | |
1216 | ||
1217 | newdyn = (abfd->flags & DYNAMIC) != 0; | |
1218 | ||
1219 | /* ref_dynamic_nonweak and dynamic_def flags track actual undefined | |
1220 | syms and defined syms in dynamic libraries respectively. | |
1221 | ref_dynamic on the other hand can be set for a symbol defined in | |
1222 | a dynamic library, and def_dynamic may not be set; When the | |
1223 | definition in a dynamic lib is overridden by a definition in the | |
1224 | executable use of the symbol in the dynamic lib becomes a | |
1225 | reference to the executable symbol. */ | |
1226 | if (newdyn) | |
1227 | { | |
1228 | if (bfd_is_und_section (sec)) | |
1229 | { | |
1230 | if (bind != STB_WEAK) | |
1231 | { | |
1232 | h->ref_dynamic_nonweak = 1; | |
1233 | hi->ref_dynamic_nonweak = 1; | |
1234 | } | |
1235 | } | |
1236 | else | |
1237 | { | |
6e33951e L |
1238 | /* Update the existing symbol only if they match. */ |
1239 | if (*matched) | |
1240 | h->dynamic_def = 1; | |
ee659f1f AM |
1241 | hi->dynamic_def = 1; |
1242 | } | |
1243 | } | |
1244 | ||
45d6a902 AM |
1245 | /* If we just created the symbol, mark it as being an ELF symbol. |
1246 | Other than that, there is nothing to do--there is no merge issue | |
1247 | with a newly defined symbol--so we just return. */ | |
1248 | ||
1249 | if (h->root.type == bfd_link_hash_new) | |
252b5132 | 1250 | { |
f5385ebf | 1251 | h->non_elf = 0; |
0a1b45a2 | 1252 | return true; |
45d6a902 | 1253 | } |
252b5132 | 1254 | |
45d6a902 AM |
1255 | /* In cases involving weak versioned symbols, we may wind up trying |
1256 | to merge a symbol with itself. Catch that here, to avoid the | |
1257 | confusion that results if we try to override a symbol with | |
1258 | itself. The additional tests catch cases like | |
1259 | _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a | |
1260 | dynamic object, which we do want to handle here. */ | |
1261 | if (abfd == oldbfd | |
895fa45f | 1262 | && (newweak || oldweak) |
45d6a902 | 1263 | && ((abfd->flags & DYNAMIC) == 0 |
f5385ebf | 1264 | || !h->def_regular)) |
0a1b45a2 | 1265 | return true; |
45d6a902 | 1266 | |
0a1b45a2 | 1267 | olddyn = false; |
45d6a902 AM |
1268 | if (oldbfd != NULL) |
1269 | olddyn = (oldbfd->flags & DYNAMIC) != 0; | |
707bba77 | 1270 | else if (oldsec != NULL) |
45d6a902 | 1271 | { |
707bba77 | 1272 | /* This handles the special SHN_MIPS_{TEXT,DATA} section |
45d6a902 | 1273 | indices used by MIPS ELF. */ |
707bba77 | 1274 | olddyn = (oldsec->symbol->flags & BSF_DYNAMIC) != 0; |
45d6a902 | 1275 | } |
252b5132 | 1276 | |
1a3b5c34 AM |
1277 | /* Handle a case where plugin_notice won't be called and thus won't |
1278 | set the non_ir_ref flags on the first pass over symbols. */ | |
1279 | if (oldbfd != NULL | |
1280 | && (oldbfd->flags & BFD_PLUGIN) != (abfd->flags & BFD_PLUGIN) | |
1281 | && newdyn != olddyn) | |
1282 | { | |
0a1b45a2 AM |
1283 | h->root.non_ir_ref_dynamic = true; |
1284 | hi->root.non_ir_ref_dynamic = true; | |
1a3b5c34 AM |
1285 | } |
1286 | ||
45d6a902 AM |
1287 | /* NEWDEF and OLDDEF indicate whether the new or old symbol, |
1288 | respectively, appear to be a definition rather than reference. */ | |
1289 | ||
707bba77 | 1290 | newdef = !bfd_is_und_section (sec) && !bfd_is_com_section (sec); |
45d6a902 | 1291 | |
707bba77 AM |
1292 | olddef = (h->root.type != bfd_link_hash_undefined |
1293 | && h->root.type != bfd_link_hash_undefweak | |
202ac193 | 1294 | && h->root.type != bfd_link_hash_common); |
45d6a902 | 1295 | |
0a36a439 L |
1296 | /* NEWFUNC and OLDFUNC indicate whether the new or old symbol, |
1297 | respectively, appear to be a function. */ | |
1298 | ||
1299 | newfunc = (ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1300 | && bed->is_function_type (ELF_ST_TYPE (sym->st_info))); | |
1301 | ||
1302 | oldfunc = (h->type != STT_NOTYPE | |
1303 | && bed->is_function_type (h->type)); | |
1304 | ||
c5d37467 | 1305 | if (!(newfunc && oldfunc) |
5b677558 AM |
1306 | && ELF_ST_TYPE (sym->st_info) != h->type |
1307 | && ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1308 | && h->type != STT_NOTYPE | |
c5d37467 AM |
1309 | && (newdef || bfd_is_com_section (sec)) |
1310 | && (olddef || h->root.type == bfd_link_hash_common)) | |
580a2b6e | 1311 | { |
c5d37467 AM |
1312 | /* If creating a default indirect symbol ("foo" or "foo@") from |
1313 | a dynamic versioned definition ("foo@@") skip doing so if | |
1314 | there is an existing regular definition with a different | |
1315 | type. We don't want, for example, a "time" variable in the | |
1316 | executable overriding a "time" function in a shared library. */ | |
1317 | if (newdyn | |
1318 | && !olddyn) | |
1319 | { | |
0a1b45a2 AM |
1320 | *skip = true; |
1321 | return true; | |
c5d37467 AM |
1322 | } |
1323 | ||
1324 | /* When adding a symbol from a regular object file after we have | |
1325 | created indirect symbols, undo the indirection and any | |
1326 | dynamic state. */ | |
1327 | if (hi != h | |
1328 | && !newdyn | |
1329 | && olddyn) | |
1330 | { | |
1331 | h = hi; | |
0a1b45a2 | 1332 | (*bed->elf_backend_hide_symbol) (info, h, true); |
c5d37467 AM |
1333 | h->forced_local = 0; |
1334 | h->ref_dynamic = 0; | |
1335 | h->def_dynamic = 0; | |
1336 | h->dynamic_def = 0; | |
1337 | if (h->root.u.undef.next || info->hash->undefs_tail == &h->root) | |
1338 | { | |
1339 | h->root.type = bfd_link_hash_undefined; | |
1340 | h->root.u.undef.abfd = abfd; | |
1341 | } | |
1342 | else | |
1343 | { | |
1344 | h->root.type = bfd_link_hash_new; | |
1345 | h->root.u.undef.abfd = NULL; | |
1346 | } | |
0a1b45a2 | 1347 | return true; |
c5d37467 | 1348 | } |
580a2b6e L |
1349 | } |
1350 | ||
4c34aff8 AM |
1351 | /* Check TLS symbols. We don't check undefined symbols introduced |
1352 | by "ld -u" which have no type (and oldbfd NULL), and we don't | |
1353 | check symbols from plugins because they also have no type. */ | |
1354 | if (oldbfd != NULL | |
1355 | && (oldbfd->flags & BFD_PLUGIN) == 0 | |
1356 | && (abfd->flags & BFD_PLUGIN) == 0 | |
1357 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1358 | && (ELF_ST_TYPE (sym->st_info) == STT_TLS || h->type == STT_TLS)) | |
7479dfd4 L |
1359 | { |
1360 | bfd *ntbfd, *tbfd; | |
0a1b45a2 | 1361 | bool ntdef, tdef; |
7479dfd4 L |
1362 | asection *ntsec, *tsec; |
1363 | ||
1364 | if (h->type == STT_TLS) | |
1365 | { | |
3b36f7e6 | 1366 | ntbfd = abfd; |
7479dfd4 L |
1367 | ntsec = sec; |
1368 | ntdef = newdef; | |
1369 | tbfd = oldbfd; | |
1370 | tsec = oldsec; | |
1371 | tdef = olddef; | |
1372 | } | |
1373 | else | |
1374 | { | |
1375 | ntbfd = oldbfd; | |
1376 | ntsec = oldsec; | |
1377 | ntdef = olddef; | |
1378 | tbfd = abfd; | |
1379 | tsec = sec; | |
1380 | tdef = newdef; | |
1381 | } | |
1382 | ||
1383 | if (tdef && ntdef) | |
4eca0228 | 1384 | _bfd_error_handler |
695344c0 | 1385 | /* xgettext:c-format */ |
871b3ab2 AM |
1386 | (_("%s: TLS definition in %pB section %pA " |
1387 | "mismatches non-TLS definition in %pB section %pA"), | |
c08bb8dd | 1388 | h->root.root.string, tbfd, tsec, ntbfd, ntsec); |
7479dfd4 | 1389 | else if (!tdef && !ntdef) |
4eca0228 | 1390 | _bfd_error_handler |
695344c0 | 1391 | /* xgettext:c-format */ |
871b3ab2 AM |
1392 | (_("%s: TLS reference in %pB " |
1393 | "mismatches non-TLS reference in %pB"), | |
c08bb8dd | 1394 | h->root.root.string, tbfd, ntbfd); |
7479dfd4 | 1395 | else if (tdef) |
4eca0228 | 1396 | _bfd_error_handler |
695344c0 | 1397 | /* xgettext:c-format */ |
871b3ab2 AM |
1398 | (_("%s: TLS definition in %pB section %pA " |
1399 | "mismatches non-TLS reference in %pB"), | |
c08bb8dd | 1400 | h->root.root.string, tbfd, tsec, ntbfd); |
7479dfd4 | 1401 | else |
4eca0228 | 1402 | _bfd_error_handler |
695344c0 | 1403 | /* xgettext:c-format */ |
871b3ab2 AM |
1404 | (_("%s: TLS reference in %pB " |
1405 | "mismatches non-TLS definition in %pB section %pA"), | |
c08bb8dd | 1406 | h->root.root.string, tbfd, ntbfd, ntsec); |
7479dfd4 L |
1407 | |
1408 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 1409 | return false; |
7479dfd4 L |
1410 | } |
1411 | ||
45d6a902 AM |
1412 | /* If the old symbol has non-default visibility, we ignore the new |
1413 | definition from a dynamic object. */ | |
1414 | if (newdyn | |
9c7a29a3 | 1415 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 AM |
1416 | && !bfd_is_und_section (sec)) |
1417 | { | |
0a1b45a2 | 1418 | *skip = true; |
45d6a902 | 1419 | /* Make sure this symbol is dynamic. */ |
f5385ebf | 1420 | h->ref_dynamic = 1; |
90c984fc | 1421 | hi->ref_dynamic = 1; |
45d6a902 AM |
1422 | /* A protected symbol has external availability. Make sure it is |
1423 | recorded as dynamic. | |
1424 | ||
1425 | FIXME: Should we check type and size for protected symbol? */ | |
1426 | if (ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
c152c796 | 1427 | return bfd_elf_link_record_dynamic_symbol (info, h); |
45d6a902 | 1428 | else |
0a1b45a2 | 1429 | return true; |
45d6a902 AM |
1430 | } |
1431 | else if (!newdyn | |
9c7a29a3 | 1432 | && ELF_ST_VISIBILITY (sym->st_other) != STV_DEFAULT |
f5385ebf | 1433 | && h->def_dynamic) |
45d6a902 AM |
1434 | { |
1435 | /* If the new symbol with non-default visibility comes from a | |
1436 | relocatable file and the old definition comes from a dynamic | |
1437 | object, we remove the old definition. */ | |
6c9b78e6 | 1438 | if (hi->root.type == bfd_link_hash_indirect) |
d2dee3b2 L |
1439 | { |
1440 | /* Handle the case where the old dynamic definition is | |
1441 | default versioned. We need to copy the symbol info from | |
1442 | the symbol with default version to the normal one if it | |
1443 | was referenced before. */ | |
1444 | if (h->ref_regular) | |
1445 | { | |
6c9b78e6 | 1446 | hi->root.type = h->root.type; |
d2dee3b2 | 1447 | h->root.type = bfd_link_hash_indirect; |
6c9b78e6 | 1448 | (*bed->elf_backend_copy_indirect_symbol) (info, hi, h); |
aed81c4e | 1449 | |
6c9b78e6 | 1450 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; |
aed81c4e | 1451 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
d2dee3b2 | 1452 | { |
aed81c4e MR |
1453 | /* If the new symbol is hidden or internal, completely undo |
1454 | any dynamic link state. */ | |
0a1b45a2 | 1455 | (*bed->elf_backend_hide_symbol) (info, h, true); |
aed81c4e MR |
1456 | h->forced_local = 0; |
1457 | h->ref_dynamic = 0; | |
d2dee3b2 L |
1458 | } |
1459 | else | |
aed81c4e MR |
1460 | h->ref_dynamic = 1; |
1461 | ||
1462 | h->def_dynamic = 0; | |
aed81c4e MR |
1463 | /* FIXME: Should we check type and size for protected symbol? */ |
1464 | h->size = 0; | |
1465 | h->type = 0; | |
1466 | ||
6c9b78e6 | 1467 | h = hi; |
d2dee3b2 L |
1468 | } |
1469 | else | |
6c9b78e6 | 1470 | h = hi; |
d2dee3b2 | 1471 | } |
1de1a317 | 1472 | |
f5eda473 AM |
1473 | /* If the old symbol was undefined before, then it will still be |
1474 | on the undefs list. If the new symbol is undefined or | |
1475 | common, we can't make it bfd_link_hash_new here, because new | |
1476 | undefined or common symbols will be added to the undefs list | |
1477 | by _bfd_generic_link_add_one_symbol. Symbols may not be | |
1478 | added twice to the undefs list. Also, if the new symbol is | |
1479 | undefweak then we don't want to lose the strong undef. */ | |
1480 | if (h->root.u.undef.next || info->hash->undefs_tail == &h->root) | |
1de1a317 | 1481 | { |
1de1a317 | 1482 | h->root.type = bfd_link_hash_undefined; |
1de1a317 L |
1483 | h->root.u.undef.abfd = abfd; |
1484 | } | |
1485 | else | |
1486 | { | |
1487 | h->root.type = bfd_link_hash_new; | |
1488 | h->root.u.undef.abfd = NULL; | |
1489 | } | |
1490 | ||
f5eda473 | 1491 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
252b5132 | 1492 | { |
f5eda473 AM |
1493 | /* If the new symbol is hidden or internal, completely undo |
1494 | any dynamic link state. */ | |
0a1b45a2 | 1495 | (*bed->elf_backend_hide_symbol) (info, h, true); |
f5eda473 AM |
1496 | h->forced_local = 0; |
1497 | h->ref_dynamic = 0; | |
45d6a902 | 1498 | } |
f5eda473 AM |
1499 | else |
1500 | h->ref_dynamic = 1; | |
1501 | h->def_dynamic = 0; | |
45d6a902 AM |
1502 | /* FIXME: Should we check type and size for protected symbol? */ |
1503 | h->size = 0; | |
1504 | h->type = 0; | |
0a1b45a2 | 1505 | return true; |
45d6a902 | 1506 | } |
14a793b2 | 1507 | |
15b43f48 AM |
1508 | /* If a new weak symbol definition comes from a regular file and the |
1509 | old symbol comes from a dynamic library, we treat the new one as | |
1510 | strong. Similarly, an old weak symbol definition from a regular | |
1511 | file is treated as strong when the new symbol comes from a dynamic | |
1512 | library. Further, an old weak symbol from a dynamic library is | |
1513 | treated as strong if the new symbol is from a dynamic library. | |
1514 | This reflects the way glibc's ld.so works. | |
1515 | ||
165f707a AM |
1516 | Also allow a weak symbol to override a linker script symbol |
1517 | defined by an early pass over the script. This is done so the | |
1518 | linker knows the symbol is defined in an object file, for the | |
1519 | DEFINED script function. | |
1520 | ||
15b43f48 AM |
1521 | Do this before setting *type_change_ok or *size_change_ok so that |
1522 | we warn properly when dynamic library symbols are overridden. */ | |
1523 | ||
165f707a | 1524 | if (newdef && !newdyn && (olddyn || h->root.ldscript_def)) |
0a1b45a2 | 1525 | newweak = false; |
15b43f48 | 1526 | if (olddef && newdyn) |
0a1b45a2 | 1527 | oldweak = false; |
0f8a2703 | 1528 | |
d334575b | 1529 | /* Allow changes between different types of function symbol. */ |
0a36a439 | 1530 | if (newfunc && oldfunc) |
0a1b45a2 | 1531 | *type_change_ok = true; |
fcb93ecf | 1532 | |
79349b09 AM |
1533 | /* It's OK to change the type if either the existing symbol or the |
1534 | new symbol is weak. A type change is also OK if the old symbol | |
1535 | is undefined and the new symbol is defined. */ | |
252b5132 | 1536 | |
79349b09 AM |
1537 | if (oldweak |
1538 | || newweak | |
1539 | || (newdef | |
1540 | && h->root.type == bfd_link_hash_undefined)) | |
0a1b45a2 | 1541 | *type_change_ok = true; |
79349b09 AM |
1542 | |
1543 | /* It's OK to change the size if either the existing symbol or the | |
1544 | new symbol is weak, or if the old symbol is undefined. */ | |
1545 | ||
1546 | if (*type_change_ok | |
1547 | || h->root.type == bfd_link_hash_undefined) | |
0a1b45a2 | 1548 | *size_change_ok = true; |
45d6a902 | 1549 | |
45d6a902 AM |
1550 | /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old |
1551 | symbol, respectively, appears to be a common symbol in a dynamic | |
1552 | object. If a symbol appears in an uninitialized section, and is | |
1553 | not weak, and is not a function, then it may be a common symbol | |
1554 | which was resolved when the dynamic object was created. We want | |
1555 | to treat such symbols specially, because they raise special | |
1556 | considerations when setting the symbol size: if the symbol | |
1557 | appears as a common symbol in a regular object, and the size in | |
1558 | the regular object is larger, we must make sure that we use the | |
1559 | larger size. This problematic case can always be avoided in C, | |
1560 | but it must be handled correctly when using Fortran shared | |
1561 | libraries. | |
1562 | ||
1563 | Note that if NEWDYNCOMMON is set, NEWDEF will be set, and | |
1564 | likewise for OLDDYNCOMMON and OLDDEF. | |
1565 | ||
1566 | Note that this test is just a heuristic, and that it is quite | |
1567 | possible to have an uninitialized symbol in a shared object which | |
1568 | is really a definition, rather than a common symbol. This could | |
1569 | lead to some minor confusion when the symbol really is a common | |
1570 | symbol in some regular object. However, I think it will be | |
1571 | harmless. */ | |
1572 | ||
1573 | if (newdyn | |
1574 | && newdef | |
79349b09 | 1575 | && !newweak |
45d6a902 AM |
1576 | && (sec->flags & SEC_ALLOC) != 0 |
1577 | && (sec->flags & SEC_LOAD) == 0 | |
1578 | && sym->st_size > 0 | |
0a36a439 | 1579 | && !newfunc) |
0a1b45a2 | 1580 | newdyncommon = true; |
45d6a902 | 1581 | else |
0a1b45a2 | 1582 | newdyncommon = false; |
45d6a902 AM |
1583 | |
1584 | if (olddyn | |
1585 | && olddef | |
1586 | && h->root.type == bfd_link_hash_defined | |
f5385ebf | 1587 | && h->def_dynamic |
45d6a902 AM |
1588 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 |
1589 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
1590 | && h->size > 0 | |
0a36a439 | 1591 | && !oldfunc) |
0a1b45a2 | 1592 | olddyncommon = true; |
45d6a902 | 1593 | else |
0a1b45a2 | 1594 | olddyncommon = false; |
45d6a902 | 1595 | |
a4d8e49b L |
1596 | /* We now know everything about the old and new symbols. We ask the |
1597 | backend to check if we can merge them. */ | |
5d13b3b3 AM |
1598 | if (bed->merge_symbol != NULL) |
1599 | { | |
1600 | if (!bed->merge_symbol (h, sym, psec, newdef, olddef, oldbfd, oldsec)) | |
0a1b45a2 | 1601 | return false; |
5d13b3b3 AM |
1602 | sec = *psec; |
1603 | } | |
a4d8e49b | 1604 | |
a83ef4d1 L |
1605 | /* There are multiple definitions of a normal symbol. Skip the |
1606 | default symbol as well as definition from an IR object. */ | |
93f4de39 | 1607 | if (olddef && !olddyn && !oldweak && newdef && !newdyn && !newweak |
a83ef4d1 L |
1608 | && !default_sym && h->def_regular |
1609 | && !(oldbfd != NULL | |
1610 | && (oldbfd->flags & BFD_PLUGIN) != 0 | |
1611 | && (abfd->flags & BFD_PLUGIN) == 0)) | |
93f4de39 RL |
1612 | { |
1613 | /* Handle a multiple definition. */ | |
1614 | (*info->callbacks->multiple_definition) (info, &h->root, | |
1615 | abfd, sec, *pvalue); | |
0a1b45a2 AM |
1616 | *skip = true; |
1617 | return true; | |
93f4de39 RL |
1618 | } |
1619 | ||
45d6a902 AM |
1620 | /* If both the old and the new symbols look like common symbols in a |
1621 | dynamic object, set the size of the symbol to the larger of the | |
1622 | two. */ | |
1623 | ||
1624 | if (olddyncommon | |
1625 | && newdyncommon | |
1626 | && sym->st_size != h->size) | |
1627 | { | |
1628 | /* Since we think we have two common symbols, issue a multiple | |
1629 | common warning if desired. Note that we only warn if the | |
1630 | size is different. If the size is the same, we simply let | |
1631 | the old symbol override the new one as normally happens with | |
1632 | symbols defined in dynamic objects. */ | |
1633 | ||
1a72702b AM |
1634 | (*info->callbacks->multiple_common) (info, &h->root, abfd, |
1635 | bfd_link_hash_common, sym->st_size); | |
45d6a902 AM |
1636 | if (sym->st_size > h->size) |
1637 | h->size = sym->st_size; | |
252b5132 | 1638 | |
0a1b45a2 | 1639 | *size_change_ok = true; |
252b5132 RH |
1640 | } |
1641 | ||
45d6a902 AM |
1642 | /* If we are looking at a dynamic object, and we have found a |
1643 | definition, we need to see if the symbol was already defined by | |
1644 | some other object. If so, we want to use the existing | |
1645 | definition, and we do not want to report a multiple symbol | |
1646 | definition error; we do this by clobbering *PSEC to be | |
1647 | bfd_und_section_ptr. | |
1648 | ||
1649 | We treat a common symbol as a definition if the symbol in the | |
1650 | shared library is a function, since common symbols always | |
1651 | represent variables; this can cause confusion in principle, but | |
1652 | any such confusion would seem to indicate an erroneous program or | |
1653 | shared library. We also permit a common symbol in a regular | |
8170f769 | 1654 | object to override a weak symbol in a shared object. */ |
45d6a902 AM |
1655 | |
1656 | if (newdyn | |
1657 | && newdef | |
77cfaee6 | 1658 | && (olddef |
45d6a902 | 1659 | || (h->root.type == bfd_link_hash_common |
8170f769 | 1660 | && (newweak || newfunc)))) |
45d6a902 | 1661 | { |
7ba11550 | 1662 | *override = abfd; |
0a1b45a2 AM |
1663 | newdef = false; |
1664 | newdyncommon = false; | |
252b5132 | 1665 | |
45d6a902 | 1666 | *psec = sec = bfd_und_section_ptr; |
0a1b45a2 | 1667 | *size_change_ok = true; |
252b5132 | 1668 | |
45d6a902 AM |
1669 | /* If we get here when the old symbol is a common symbol, then |
1670 | we are explicitly letting it override a weak symbol or | |
1671 | function in a dynamic object, and we don't want to warn about | |
1672 | a type change. If the old symbol is a defined symbol, a type | |
1673 | change warning may still be appropriate. */ | |
252b5132 | 1674 | |
45d6a902 | 1675 | if (h->root.type == bfd_link_hash_common) |
0a1b45a2 | 1676 | *type_change_ok = true; |
45d6a902 AM |
1677 | } |
1678 | ||
1679 | /* Handle the special case of an old common symbol merging with a | |
1680 | new symbol which looks like a common symbol in a shared object. | |
1681 | We change *PSEC and *PVALUE to make the new symbol look like a | |
91134c82 L |
1682 | common symbol, and let _bfd_generic_link_add_one_symbol do the |
1683 | right thing. */ | |
45d6a902 AM |
1684 | |
1685 | if (newdyncommon | |
1686 | && h->root.type == bfd_link_hash_common) | |
1687 | { | |
7ba11550 | 1688 | *override = oldbfd; |
0a1b45a2 AM |
1689 | newdef = false; |
1690 | newdyncommon = false; | |
45d6a902 | 1691 | *pvalue = sym->st_size; |
a4d8e49b | 1692 | *psec = sec = bed->common_section (oldsec); |
0a1b45a2 | 1693 | *size_change_ok = true; |
45d6a902 AM |
1694 | } |
1695 | ||
c5e2cead | 1696 | /* Skip weak definitions of symbols that are already defined. */ |
f41d945b | 1697 | if (newdef && olddef && newweak) |
54ac0771 | 1698 | { |
35ed3f94 | 1699 | /* Don't skip new non-IR weak syms. */ |
3a5dbfb2 AM |
1700 | if (!(oldbfd != NULL |
1701 | && (oldbfd->flags & BFD_PLUGIN) != 0 | |
35ed3f94 | 1702 | && (abfd->flags & BFD_PLUGIN) == 0)) |
57fa7b8c | 1703 | { |
0a1b45a2 AM |
1704 | newdef = false; |
1705 | *skip = true; | |
57fa7b8c | 1706 | } |
54ac0771 L |
1707 | |
1708 | /* Merge st_other. If the symbol already has a dynamic index, | |
1709 | but visibility says it should not be visible, turn it into a | |
1710 | local symbol. */ | |
5160d0f3 | 1711 | elf_merge_st_other (abfd, h, sym->st_other, sec, newdef, newdyn); |
54ac0771 L |
1712 | if (h->dynindx != -1) |
1713 | switch (ELF_ST_VISIBILITY (h->other)) | |
1714 | { | |
1715 | case STV_INTERNAL: | |
1716 | case STV_HIDDEN: | |
0a1b45a2 | 1717 | (*bed->elf_backend_hide_symbol) (info, h, true); |
54ac0771 L |
1718 | break; |
1719 | } | |
1720 | } | |
c5e2cead | 1721 | |
45d6a902 AM |
1722 | /* If the old symbol is from a dynamic object, and the new symbol is |
1723 | a definition which is not from a dynamic object, then the new | |
1724 | symbol overrides the old symbol. Symbols from regular files | |
1725 | always take precedence over symbols from dynamic objects, even if | |
1726 | they are defined after the dynamic object in the link. | |
1727 | ||
1728 | As above, we again permit a common symbol in a regular object to | |
1729 | override a definition in a shared object if the shared object | |
0f8a2703 | 1730 | symbol is a function or is weak. */ |
45d6a902 AM |
1731 | |
1732 | flip = NULL; | |
77cfaee6 | 1733 | if (!newdyn |
45d6a902 AM |
1734 | && (newdef |
1735 | || (bfd_is_com_section (sec) | |
0a36a439 | 1736 | && (oldweak || oldfunc))) |
45d6a902 AM |
1737 | && olddyn |
1738 | && olddef | |
f5385ebf | 1739 | && h->def_dynamic) |
45d6a902 AM |
1740 | { |
1741 | /* Change the hash table entry to undefined, and let | |
1742 | _bfd_generic_link_add_one_symbol do the right thing with the | |
1743 | new definition. */ | |
1744 | ||
1745 | h->root.type = bfd_link_hash_undefined; | |
1746 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
0a1b45a2 | 1747 | *size_change_ok = true; |
45d6a902 | 1748 | |
0a1b45a2 AM |
1749 | olddef = false; |
1750 | olddyncommon = false; | |
45d6a902 AM |
1751 | |
1752 | /* We again permit a type change when a common symbol may be | |
1753 | overriding a function. */ | |
1754 | ||
1755 | if (bfd_is_com_section (sec)) | |
0a36a439 L |
1756 | { |
1757 | if (oldfunc) | |
1758 | { | |
1759 | /* If a common symbol overrides a function, make sure | |
1760 | that it isn't defined dynamically nor has type | |
1761 | function. */ | |
1762 | h->def_dynamic = 0; | |
1763 | h->type = STT_NOTYPE; | |
1764 | } | |
0a1b45a2 | 1765 | *type_change_ok = true; |
0a36a439 | 1766 | } |
45d6a902 | 1767 | |
6c9b78e6 AM |
1768 | if (hi->root.type == bfd_link_hash_indirect) |
1769 | flip = hi; | |
45d6a902 AM |
1770 | else |
1771 | /* This union may have been set to be non-NULL when this symbol | |
1772 | was seen in a dynamic object. We must force the union to be | |
1773 | NULL, so that it is correct for a regular symbol. */ | |
1774 | h->verinfo.vertree = NULL; | |
1775 | } | |
1776 | ||
1777 | /* Handle the special case of a new common symbol merging with an | |
1778 | old symbol that looks like it might be a common symbol defined in | |
1779 | a shared object. Note that we have already handled the case in | |
1780 | which a new common symbol should simply override the definition | |
1781 | in the shared library. */ | |
1782 | ||
1783 | if (! newdyn | |
1784 | && bfd_is_com_section (sec) | |
1785 | && olddyncommon) | |
1786 | { | |
1787 | /* It would be best if we could set the hash table entry to a | |
1788 | common symbol, but we don't know what to use for the section | |
1789 | or the alignment. */ | |
1a72702b AM |
1790 | (*info->callbacks->multiple_common) (info, &h->root, abfd, |
1791 | bfd_link_hash_common, sym->st_size); | |
45d6a902 | 1792 | |
4cc11e76 | 1793 | /* If the presumed common symbol in the dynamic object is |
45d6a902 AM |
1794 | larger, pretend that the new symbol has its size. */ |
1795 | ||
1796 | if (h->size > *pvalue) | |
1797 | *pvalue = h->size; | |
1798 | ||
af44c138 L |
1799 | /* We need to remember the alignment required by the symbol |
1800 | in the dynamic object. */ | |
1801 | BFD_ASSERT (pold_alignment); | |
1802 | *pold_alignment = h->root.u.def.section->alignment_power; | |
45d6a902 | 1803 | |
0a1b45a2 AM |
1804 | olddef = false; |
1805 | olddyncommon = false; | |
45d6a902 AM |
1806 | |
1807 | h->root.type = bfd_link_hash_undefined; | |
1808 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1809 | ||
0a1b45a2 AM |
1810 | *size_change_ok = true; |
1811 | *type_change_ok = true; | |
45d6a902 | 1812 | |
6c9b78e6 AM |
1813 | if (hi->root.type == bfd_link_hash_indirect) |
1814 | flip = hi; | |
45d6a902 AM |
1815 | else |
1816 | h->verinfo.vertree = NULL; | |
1817 | } | |
1818 | ||
1819 | if (flip != NULL) | |
1820 | { | |
1821 | /* Handle the case where we had a versioned symbol in a dynamic | |
1822 | library and now find a definition in a normal object. In this | |
1823 | case, we make the versioned symbol point to the normal one. */ | |
45d6a902 | 1824 | flip->root.type = h->root.type; |
00cbee0a | 1825 | flip->root.u.undef.abfd = h->root.u.undef.abfd; |
45d6a902 AM |
1826 | h->root.type = bfd_link_hash_indirect; |
1827 | h->root.u.i.link = (struct bfd_link_hash_entry *) flip; | |
fcfa13d2 | 1828 | (*bed->elf_backend_copy_indirect_symbol) (info, flip, h); |
f5385ebf | 1829 | if (h->def_dynamic) |
45d6a902 | 1830 | { |
f5385ebf AM |
1831 | h->def_dynamic = 0; |
1832 | flip->ref_dynamic = 1; | |
45d6a902 AM |
1833 | } |
1834 | } | |
1835 | ||
0a1b45a2 | 1836 | return true; |
45d6a902 AM |
1837 | } |
1838 | ||
1839 | /* This function is called to create an indirect symbol from the | |
1840 | default for the symbol with the default version if needed. The | |
4f3fedcf | 1841 | symbol is described by H, NAME, SYM, SEC, and VALUE. We |
0f8a2703 | 1842 | set DYNSYM if the new indirect symbol is dynamic. */ |
45d6a902 | 1843 | |
0a1b45a2 | 1844 | static bool |
268b6b39 AM |
1845 | _bfd_elf_add_default_symbol (bfd *abfd, |
1846 | struct bfd_link_info *info, | |
1847 | struct elf_link_hash_entry *h, | |
1848 | const char *name, | |
1849 | Elf_Internal_Sym *sym, | |
4f3fedcf AM |
1850 | asection *sec, |
1851 | bfd_vma value, | |
1852 | bfd **poldbfd, | |
0a1b45a2 | 1853 | bool *dynsym) |
45d6a902 | 1854 | { |
0a1b45a2 AM |
1855 | bool type_change_ok; |
1856 | bool size_change_ok; | |
1857 | bool skip; | |
45d6a902 AM |
1858 | char *shortname; |
1859 | struct elf_link_hash_entry *hi; | |
1860 | struct bfd_link_hash_entry *bh; | |
9c5bfbb7 | 1861 | const struct elf_backend_data *bed; |
0a1b45a2 AM |
1862 | bool collect; |
1863 | bool dynamic; | |
f01fb44c | 1864 | bfd *override; |
45d6a902 AM |
1865 | char *p; |
1866 | size_t len, shortlen; | |
ffd65175 | 1867 | asection *tmp_sec; |
0a1b45a2 | 1868 | bool matched; |
45d6a902 | 1869 | |
422f1182 | 1870 | if (h->versioned == unversioned || h->versioned == versioned_hidden) |
0a1b45a2 | 1871 | return true; |
422f1182 | 1872 | |
45d6a902 AM |
1873 | /* If this symbol has a version, and it is the default version, we |
1874 | create an indirect symbol from the default name to the fully | |
1875 | decorated name. This will cause external references which do not | |
1876 | specify a version to be bound to this version of the symbol. */ | |
1877 | p = strchr (name, ELF_VER_CHR); | |
422f1182 L |
1878 | if (h->versioned == unknown) |
1879 | { | |
1880 | if (p == NULL) | |
1881 | { | |
1882 | h->versioned = unversioned; | |
0a1b45a2 | 1883 | return true; |
422f1182 L |
1884 | } |
1885 | else | |
1886 | { | |
1887 | if (p[1] != ELF_VER_CHR) | |
1888 | { | |
1889 | h->versioned = versioned_hidden; | |
0a1b45a2 | 1890 | return true; |
422f1182 L |
1891 | } |
1892 | else | |
1893 | h->versioned = versioned; | |
1894 | } | |
1895 | } | |
4373f8af L |
1896 | else |
1897 | { | |
1898 | /* PR ld/19073: We may see an unversioned definition after the | |
1899 | default version. */ | |
1900 | if (p == NULL) | |
0a1b45a2 | 1901 | return true; |
4373f8af | 1902 | } |
45d6a902 | 1903 | |
45d6a902 AM |
1904 | bed = get_elf_backend_data (abfd); |
1905 | collect = bed->collect; | |
1906 | dynamic = (abfd->flags & DYNAMIC) != 0; | |
1907 | ||
1908 | shortlen = p - name; | |
a50b1753 | 1909 | shortname = (char *) bfd_hash_allocate (&info->hash->table, shortlen + 1); |
45d6a902 | 1910 | if (shortname == NULL) |
0a1b45a2 | 1911 | return false; |
45d6a902 AM |
1912 | memcpy (shortname, name, shortlen); |
1913 | shortname[shortlen] = '\0'; | |
1914 | ||
1915 | /* We are going to create a new symbol. Merge it with any existing | |
1916 | symbol with this name. For the purposes of the merge, act as | |
1917 | though we were defining the symbol we just defined, although we | |
1918 | actually going to define an indirect symbol. */ | |
0a1b45a2 AM |
1919 | type_change_ok = false; |
1920 | size_change_ok = false; | |
1921 | matched = true; | |
ffd65175 AM |
1922 | tmp_sec = sec; |
1923 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
f01fb44c | 1924 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 1925 | &type_change_ok, &size_change_ok, &matched)) |
0a1b45a2 | 1926 | return false; |
45d6a902 AM |
1927 | |
1928 | if (skip) | |
1929 | goto nondefault; | |
1930 | ||
5fa370e4 | 1931 | if (hi->def_regular || ELF_COMMON_DEF_P (hi)) |
5b677558 AM |
1932 | { |
1933 | /* If the undecorated symbol will have a version added by a | |
1934 | script different to H, then don't indirect to/from the | |
1935 | undecorated symbol. This isn't ideal because we may not yet | |
1936 | have seen symbol versions, if given by a script on the | |
1937 | command line rather than via --version-script. */ | |
1938 | if (hi->verinfo.vertree == NULL && info->version_info != NULL) | |
1939 | { | |
0a1b45a2 | 1940 | bool hide; |
5b677558 AM |
1941 | |
1942 | hi->verinfo.vertree | |
1943 | = bfd_find_version_for_sym (info->version_info, | |
1944 | hi->root.root.string, &hide); | |
1945 | if (hi->verinfo.vertree != NULL && hide) | |
1946 | { | |
0a1b45a2 | 1947 | (*bed->elf_backend_hide_symbol) (info, hi, true); |
5b677558 AM |
1948 | goto nondefault; |
1949 | } | |
1950 | } | |
1951 | if (hi->verinfo.vertree != NULL | |
1952 | && strcmp (p + 1 + (p[1] == '@'), hi->verinfo.vertree->name) != 0) | |
f01fb44c | 1953 | goto nondefault; |
5b677558 AM |
1954 | } |
1955 | ||
f01fb44c | 1956 | if (! override) |
45d6a902 | 1957 | { |
c6e8a9a8 | 1958 | /* Add the default symbol if not performing a relocatable link. */ |
0e1862bb | 1959 | if (! bfd_link_relocatable (info)) |
c6e8a9a8 L |
1960 | { |
1961 | bh = &hi->root; | |
fbcc8baf | 1962 | if (bh->type == bfd_link_hash_defined |
6cc71b82 | 1963 | && bh->u.def.section->owner != NULL |
fbcc8baf L |
1964 | && (bh->u.def.section->owner->flags & BFD_PLUGIN) != 0) |
1965 | { | |
1966 | /* Mark the previous definition from IR object as | |
1967 | undefined so that the generic linker will override | |
1968 | it. */ | |
1969 | bh->type = bfd_link_hash_undefined; | |
1970 | bh->u.undef.abfd = bh->u.def.section->owner; | |
1971 | } | |
c6e8a9a8 L |
1972 | if (! (_bfd_generic_link_add_one_symbol |
1973 | (info, abfd, shortname, BSF_INDIRECT, | |
1974 | bfd_ind_section_ptr, | |
0a1b45a2 AM |
1975 | 0, name, false, collect, &bh))) |
1976 | return false; | |
c6e8a9a8 L |
1977 | hi = (struct elf_link_hash_entry *) bh; |
1978 | } | |
45d6a902 AM |
1979 | } |
1980 | else | |
1981 | { | |
1982 | /* In this case the symbol named SHORTNAME is overriding the | |
1983 | indirect symbol we want to add. We were planning on making | |
1984 | SHORTNAME an indirect symbol referring to NAME. SHORTNAME | |
1985 | is the name without a version. NAME is the fully versioned | |
1986 | name, and it is the default version. | |
1987 | ||
1988 | Overriding means that we already saw a definition for the | |
1989 | symbol SHORTNAME in a regular object, and it is overriding | |
1990 | the symbol defined in the dynamic object. | |
1991 | ||
1992 | When this happens, we actually want to change NAME, the | |
1993 | symbol we just added, to refer to SHORTNAME. This will cause | |
1994 | references to NAME in the shared object to become references | |
1995 | to SHORTNAME in the regular object. This is what we expect | |
1996 | when we override a function in a shared object: that the | |
1997 | references in the shared object will be mapped to the | |
1998 | definition in the regular object. */ | |
1999 | ||
2000 | while (hi->root.type == bfd_link_hash_indirect | |
2001 | || hi->root.type == bfd_link_hash_warning) | |
2002 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
2003 | ||
2004 | h->root.type = bfd_link_hash_indirect; | |
2005 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; | |
f5385ebf | 2006 | if (h->def_dynamic) |
45d6a902 | 2007 | { |
f5385ebf AM |
2008 | h->def_dynamic = 0; |
2009 | hi->ref_dynamic = 1; | |
2010 | if (hi->ref_regular | |
2011 | || hi->def_regular) | |
45d6a902 | 2012 | { |
c152c796 | 2013 | if (! bfd_elf_link_record_dynamic_symbol (info, hi)) |
0a1b45a2 | 2014 | return false; |
45d6a902 AM |
2015 | } |
2016 | } | |
2017 | ||
2018 | /* Now set HI to H, so that the following code will set the | |
2019 | other fields correctly. */ | |
2020 | hi = h; | |
2021 | } | |
2022 | ||
fab4a87f L |
2023 | /* Check if HI is a warning symbol. */ |
2024 | if (hi->root.type == bfd_link_hash_warning) | |
2025 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
2026 | ||
45d6a902 AM |
2027 | /* If there is a duplicate definition somewhere, then HI may not |
2028 | point to an indirect symbol. We will have reported an error to | |
2029 | the user in that case. */ | |
2030 | ||
2031 | if (hi->root.type == bfd_link_hash_indirect) | |
2032 | { | |
2033 | struct elf_link_hash_entry *ht; | |
2034 | ||
45d6a902 | 2035 | ht = (struct elf_link_hash_entry *) hi->root.u.i.link; |
fcfa13d2 | 2036 | (*bed->elf_backend_copy_indirect_symbol) (info, ht, hi); |
45d6a902 | 2037 | |
5160d0f3 AM |
2038 | /* If we first saw a reference to SHORTNAME with non-default |
2039 | visibility, merge that visibility to the @@VER symbol. */ | |
0a1b45a2 | 2040 | elf_merge_st_other (abfd, ht, hi->other, sec, true, dynamic); |
5160d0f3 | 2041 | |
68c88cd4 AM |
2042 | /* A reference to the SHORTNAME symbol from a dynamic library |
2043 | will be satisfied by the versioned symbol at runtime. In | |
2044 | effect, we have a reference to the versioned symbol. */ | |
2045 | ht->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; | |
2046 | hi->dynamic_def |= ht->dynamic_def; | |
2047 | ||
45d6a902 AM |
2048 | /* See if the new flags lead us to realize that the symbol must |
2049 | be dynamic. */ | |
2050 | if (! *dynsym) | |
2051 | { | |
2052 | if (! dynamic) | |
2053 | { | |
0e1862bb | 2054 | if (! bfd_link_executable (info) |
90c984fc | 2055 | || hi->def_dynamic |
f5385ebf | 2056 | || hi->ref_dynamic) |
0a1b45a2 | 2057 | *dynsym = true; |
45d6a902 AM |
2058 | } |
2059 | else | |
2060 | { | |
f5385ebf | 2061 | if (hi->ref_regular) |
0a1b45a2 | 2062 | *dynsym = true; |
45d6a902 AM |
2063 | } |
2064 | } | |
2065 | } | |
2066 | ||
2067 | /* We also need to define an indirection from the nondefault version | |
2068 | of the symbol. */ | |
2069 | ||
dc1e8a47 | 2070 | nondefault: |
45d6a902 | 2071 | len = strlen (name); |
a50b1753 | 2072 | shortname = (char *) bfd_hash_allocate (&info->hash->table, len); |
45d6a902 | 2073 | if (shortname == NULL) |
0a1b45a2 | 2074 | return false; |
45d6a902 AM |
2075 | memcpy (shortname, name, shortlen); |
2076 | memcpy (shortname + shortlen, p + 1, len - shortlen); | |
2077 | ||
2078 | /* Once again, merge with any existing symbol. */ | |
0a1b45a2 AM |
2079 | type_change_ok = false; |
2080 | size_change_ok = false; | |
ffd65175 AM |
2081 | tmp_sec = sec; |
2082 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
f01fb44c | 2083 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 2084 | &type_change_ok, &size_change_ok, &matched)) |
0a1b45a2 | 2085 | return false; |
45d6a902 AM |
2086 | |
2087 | if (skip) | |
726d7d1e AM |
2088 | { |
2089 | if (!dynamic | |
2090 | && h->root.type == bfd_link_hash_defweak | |
2091 | && hi->root.type == bfd_link_hash_defined) | |
2092 | { | |
2093 | /* We are handling a weak sym@@ver and attempting to define | |
2094 | a weak sym@ver, but _bfd_elf_merge_symbol said to skip the | |
2095 | new weak sym@ver because there is already a strong sym@ver. | |
2096 | However, sym@ver and sym@@ver are really the same symbol. | |
2097 | The existing strong sym@ver ought to override sym@@ver. */ | |
2098 | h->root.type = bfd_link_hash_defined; | |
2099 | h->root.u.def.section = hi->root.u.def.section; | |
2100 | h->root.u.def.value = hi->root.u.def.value; | |
2101 | hi->root.type = bfd_link_hash_indirect; | |
2102 | hi->root.u.i.link = &h->root; | |
2103 | } | |
2104 | else | |
0a1b45a2 | 2105 | return true; |
726d7d1e | 2106 | } |
f01fb44c | 2107 | else if (override) |
45d6a902 AM |
2108 | { |
2109 | /* Here SHORTNAME is a versioned name, so we don't expect to see | |
2110 | the type of override we do in the case above unless it is | |
4cc11e76 | 2111 | overridden by a versioned definition. */ |
45d6a902 AM |
2112 | if (hi->root.type != bfd_link_hash_defined |
2113 | && hi->root.type != bfd_link_hash_defweak) | |
4eca0228 | 2114 | _bfd_error_handler |
695344c0 | 2115 | /* xgettext:c-format */ |
871b3ab2 | 2116 | (_("%pB: unexpected redefinition of indirect versioned symbol `%s'"), |
d003868e | 2117 | abfd, shortname); |
0a1b45a2 | 2118 | return true; |
45d6a902 AM |
2119 | } |
2120 | else | |
2121 | { | |
2122 | bh = &hi->root; | |
2123 | if (! (_bfd_generic_link_add_one_symbol | |
2124 | (info, abfd, shortname, BSF_INDIRECT, | |
0a1b45a2 AM |
2125 | bfd_ind_section_ptr, 0, name, false, collect, &bh))) |
2126 | return false; | |
45d6a902 | 2127 | hi = (struct elf_link_hash_entry *) bh; |
726d7d1e | 2128 | } |
45d6a902 | 2129 | |
726d7d1e AM |
2130 | /* If there is a duplicate definition somewhere, then HI may not |
2131 | point to an indirect symbol. We will have reported an error | |
2132 | to the user in that case. */ | |
2133 | if (hi->root.type == bfd_link_hash_indirect) | |
2134 | { | |
2135 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); | |
2136 | h->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; | |
2137 | hi->dynamic_def |= h->dynamic_def; | |
45d6a902 | 2138 | |
726d7d1e AM |
2139 | /* If we first saw a reference to @VER symbol with |
2140 | non-default visibility, merge that visibility to the | |
2141 | @@VER symbol. */ | |
0a1b45a2 | 2142 | elf_merge_st_other (abfd, h, hi->other, sec, true, dynamic); |
726d7d1e AM |
2143 | |
2144 | /* See if the new flags lead us to realize that the symbol | |
2145 | must be dynamic. */ | |
2146 | if (! *dynsym) | |
45d6a902 | 2147 | { |
726d7d1e | 2148 | if (! dynamic) |
45d6a902 | 2149 | { |
726d7d1e AM |
2150 | if (! bfd_link_executable (info) |
2151 | || hi->ref_dynamic) | |
0a1b45a2 | 2152 | *dynsym = true; |
726d7d1e AM |
2153 | } |
2154 | else | |
2155 | { | |
2156 | if (hi->ref_regular) | |
0a1b45a2 | 2157 | *dynsym = true; |
45d6a902 AM |
2158 | } |
2159 | } | |
2160 | } | |
2161 | ||
0a1b45a2 | 2162 | return true; |
45d6a902 AM |
2163 | } |
2164 | \f | |
2165 | /* This routine is used to export all defined symbols into the dynamic | |
2166 | symbol table. It is called via elf_link_hash_traverse. */ | |
2167 | ||
0a1b45a2 | 2168 | static bool |
268b6b39 | 2169 | _bfd_elf_export_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2170 | { |
a50b1753 | 2171 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 AM |
2172 | |
2173 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
2174 | if (h->root.type == bfd_link_hash_indirect) | |
0a1b45a2 | 2175 | return true; |
45d6a902 | 2176 | |
7686d77d AM |
2177 | /* Ignore this if we won't export it. */ |
2178 | if (!eif->info->export_dynamic && !h->dynamic) | |
0a1b45a2 | 2179 | return true; |
45d6a902 AM |
2180 | |
2181 | if (h->dynindx == -1 | |
fd91d419 L |
2182 | && (h->def_regular || h->ref_regular) |
2183 | && ! bfd_hide_sym_by_version (eif->info->version_info, | |
2184 | h->root.root.string)) | |
45d6a902 | 2185 | { |
fd91d419 | 2186 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 | 2187 | { |
0a1b45a2 AM |
2188 | eif->failed = true; |
2189 | return false; | |
45d6a902 AM |
2190 | } |
2191 | } | |
2192 | ||
0a1b45a2 | 2193 | return true; |
45d6a902 AM |
2194 | } |
2195 | \f | |
2196 | /* Look through the symbols which are defined in other shared | |
2197 | libraries and referenced here. Update the list of version | |
2198 | dependencies. This will be put into the .gnu.version_r section. | |
2199 | This function is called via elf_link_hash_traverse. */ | |
2200 | ||
0a1b45a2 | 2201 | static bool |
268b6b39 AM |
2202 | _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry *h, |
2203 | void *data) | |
45d6a902 | 2204 | { |
a50b1753 | 2205 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; |
45d6a902 AM |
2206 | Elf_Internal_Verneed *t; |
2207 | Elf_Internal_Vernaux *a; | |
986f0783 | 2208 | size_t amt; |
45d6a902 | 2209 | |
45d6a902 AM |
2210 | /* We only care about symbols defined in shared objects with version |
2211 | information. */ | |
f5385ebf AM |
2212 | if (!h->def_dynamic |
2213 | || h->def_regular | |
45d6a902 | 2214 | || h->dynindx == -1 |
7b20f099 AM |
2215 | || h->verinfo.verdef == NULL |
2216 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
2217 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
0a1b45a2 | 2218 | return true; |
45d6a902 AM |
2219 | |
2220 | /* See if we already know about this version. */ | |
28caa186 AM |
2221 | for (t = elf_tdata (rinfo->info->output_bfd)->verref; |
2222 | t != NULL; | |
2223 | t = t->vn_nextref) | |
45d6a902 AM |
2224 | { |
2225 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) | |
2226 | continue; | |
2227 | ||
2228 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2229 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
0a1b45a2 | 2230 | return true; |
45d6a902 AM |
2231 | |
2232 | break; | |
2233 | } | |
2234 | ||
2235 | /* This is a new version. Add it to tree we are building. */ | |
2236 | ||
2237 | if (t == NULL) | |
2238 | { | |
2239 | amt = sizeof *t; | |
a50b1753 | 2240 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->info->output_bfd, amt); |
45d6a902 AM |
2241 | if (t == NULL) |
2242 | { | |
0a1b45a2 AM |
2243 | rinfo->failed = true; |
2244 | return false; | |
45d6a902 AM |
2245 | } |
2246 | ||
2247 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
28caa186 AM |
2248 | t->vn_nextref = elf_tdata (rinfo->info->output_bfd)->verref; |
2249 | elf_tdata (rinfo->info->output_bfd)->verref = t; | |
45d6a902 AM |
2250 | } |
2251 | ||
2252 | amt = sizeof *a; | |
a50b1753 | 2253 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->info->output_bfd, amt); |
14b1c01e AM |
2254 | if (a == NULL) |
2255 | { | |
0a1b45a2 AM |
2256 | rinfo->failed = true; |
2257 | return false; | |
14b1c01e | 2258 | } |
45d6a902 AM |
2259 | |
2260 | /* Note that we are copying a string pointer here, and testing it | |
2261 | above. If bfd_elf_string_from_elf_section is ever changed to | |
2262 | discard the string data when low in memory, this will have to be | |
2263 | fixed. */ | |
2264 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
2265 | ||
2266 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
2267 | a->vna_nextptr = t->vn_auxptr; | |
2268 | ||
2269 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
2270 | ++rinfo->vers; | |
2271 | ||
2272 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
2273 | ||
2274 | t->vn_auxptr = a; | |
2275 | ||
0a1b45a2 | 2276 | return true; |
45d6a902 AM |
2277 | } |
2278 | ||
099bb8fb L |
2279 | /* Return TRUE and set *HIDE to TRUE if the versioned symbol is |
2280 | hidden. Set *T_P to NULL if there is no match. */ | |
2281 | ||
0a1b45a2 | 2282 | static bool |
099bb8fb L |
2283 | _bfd_elf_link_hide_versioned_symbol (struct bfd_link_info *info, |
2284 | struct elf_link_hash_entry *h, | |
2285 | const char *version_p, | |
2286 | struct bfd_elf_version_tree **t_p, | |
0a1b45a2 | 2287 | bool *hide) |
099bb8fb L |
2288 | { |
2289 | struct bfd_elf_version_tree *t; | |
2290 | ||
2291 | /* Look for the version. If we find it, it is no longer weak. */ | |
2292 | for (t = info->version_info; t != NULL; t = t->next) | |
2293 | { | |
2294 | if (strcmp (t->name, version_p) == 0) | |
2295 | { | |
2296 | size_t len; | |
2297 | char *alc; | |
2298 | struct bfd_elf_version_expr *d; | |
2299 | ||
2300 | len = version_p - h->root.root.string; | |
2301 | alc = (char *) bfd_malloc (len); | |
2302 | if (alc == NULL) | |
0a1b45a2 | 2303 | return false; |
099bb8fb L |
2304 | memcpy (alc, h->root.root.string, len - 1); |
2305 | alc[len - 1] = '\0'; | |
2306 | if (alc[len - 2] == ELF_VER_CHR) | |
2307 | alc[len - 2] = '\0'; | |
2308 | ||
2309 | h->verinfo.vertree = t; | |
0a1b45a2 | 2310 | t->used = true; |
099bb8fb L |
2311 | d = NULL; |
2312 | ||
2313 | if (t->globals.list != NULL) | |
2314 | d = (*t->match) (&t->globals, NULL, alc); | |
2315 | ||
2316 | /* See if there is anything to force this symbol to | |
2317 | local scope. */ | |
2318 | if (d == NULL && t->locals.list != NULL) | |
2319 | { | |
2320 | d = (*t->match) (&t->locals, NULL, alc); | |
2321 | if (d != NULL | |
2322 | && h->dynindx != -1 | |
2323 | && ! info->export_dynamic) | |
0a1b45a2 | 2324 | *hide = true; |
099bb8fb L |
2325 | } |
2326 | ||
2327 | free (alc); | |
2328 | break; | |
2329 | } | |
2330 | } | |
2331 | ||
2332 | *t_p = t; | |
2333 | ||
0a1b45a2 | 2334 | return true; |
099bb8fb L |
2335 | } |
2336 | ||
2337 | /* Return TRUE if the symbol H is hidden by version script. */ | |
2338 | ||
0a1b45a2 | 2339 | bool |
099bb8fb L |
2340 | _bfd_elf_link_hide_sym_by_version (struct bfd_link_info *info, |
2341 | struct elf_link_hash_entry *h) | |
2342 | { | |
2343 | const char *p; | |
0a1b45a2 | 2344 | bool hide = false; |
099bb8fb L |
2345 | const struct elf_backend_data *bed |
2346 | = get_elf_backend_data (info->output_bfd); | |
2347 | ||
2348 | /* Version script only hides symbols defined in regular objects. */ | |
2349 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) | |
0a1b45a2 | 2350 | return true; |
099bb8fb L |
2351 | |
2352 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
2353 | if (p != NULL && h->verinfo.vertree == NULL) | |
2354 | { | |
2355 | struct bfd_elf_version_tree *t; | |
2356 | ||
2357 | ++p; | |
2358 | if (*p == ELF_VER_CHR) | |
2359 | ++p; | |
2360 | ||
2361 | if (*p != '\0' | |
2362 | && _bfd_elf_link_hide_versioned_symbol (info, h, p, &t, &hide) | |
2363 | && hide) | |
2364 | { | |
2365 | if (hide) | |
0a1b45a2 AM |
2366 | (*bed->elf_backend_hide_symbol) (info, h, true); |
2367 | return true; | |
099bb8fb L |
2368 | } |
2369 | } | |
2370 | ||
2371 | /* If we don't have a version for this symbol, see if we can find | |
2372 | something. */ | |
2373 | if (h->verinfo.vertree == NULL && info->version_info != NULL) | |
2374 | { | |
2375 | h->verinfo.vertree | |
2376 | = bfd_find_version_for_sym (info->version_info, | |
2377 | h->root.root.string, &hide); | |
2378 | if (h->verinfo.vertree != NULL && hide) | |
2379 | { | |
0a1b45a2 AM |
2380 | (*bed->elf_backend_hide_symbol) (info, h, true); |
2381 | return true; | |
099bb8fb L |
2382 | } |
2383 | } | |
2384 | ||
0a1b45a2 | 2385 | return false; |
099bb8fb L |
2386 | } |
2387 | ||
45d6a902 AM |
2388 | /* Figure out appropriate versions for all the symbols. We may not |
2389 | have the version number script until we have read all of the input | |
2390 | files, so until that point we don't know which symbols should be | |
2391 | local. This function is called via elf_link_hash_traverse. */ | |
2392 | ||
0a1b45a2 | 2393 | static bool |
268b6b39 | 2394 | _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2395 | { |
28caa186 | 2396 | struct elf_info_failed *sinfo; |
45d6a902 | 2397 | struct bfd_link_info *info; |
9c5bfbb7 | 2398 | const struct elf_backend_data *bed; |
45d6a902 AM |
2399 | struct elf_info_failed eif; |
2400 | char *p; | |
0a1b45a2 | 2401 | bool hide; |
45d6a902 | 2402 | |
a50b1753 | 2403 | sinfo = (struct elf_info_failed *) data; |
45d6a902 AM |
2404 | info = sinfo->info; |
2405 | ||
45d6a902 | 2406 | /* Fix the symbol flags. */ |
0a1b45a2 | 2407 | eif.failed = false; |
45d6a902 AM |
2408 | eif.info = info; |
2409 | if (! _bfd_elf_fix_symbol_flags (h, &eif)) | |
2410 | { | |
2411 | if (eif.failed) | |
0a1b45a2 AM |
2412 | sinfo->failed = true; |
2413 | return false; | |
45d6a902 AM |
2414 | } |
2415 | ||
0a640d71 L |
2416 | bed = get_elf_backend_data (info->output_bfd); |
2417 | ||
45d6a902 AM |
2418 | /* We only need version numbers for symbols defined in regular |
2419 | objects. */ | |
5fa370e4 | 2420 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
0a640d71 L |
2421 | { |
2422 | /* Hide symbols defined in discarded input sections. */ | |
2423 | if ((h->root.type == bfd_link_hash_defined | |
2424 | || h->root.type == bfd_link_hash_defweak) | |
2425 | && discarded_section (h->root.u.def.section)) | |
0a1b45a2 AM |
2426 | (*bed->elf_backend_hide_symbol) (info, h, true); |
2427 | return true; | |
0a640d71 | 2428 | } |
45d6a902 | 2429 | |
0a1b45a2 | 2430 | hide = false; |
45d6a902 AM |
2431 | p = strchr (h->root.root.string, ELF_VER_CHR); |
2432 | if (p != NULL && h->verinfo.vertree == NULL) | |
2433 | { | |
2434 | struct bfd_elf_version_tree *t; | |
45d6a902 | 2435 | |
45d6a902 AM |
2436 | ++p; |
2437 | if (*p == ELF_VER_CHR) | |
6e33951e | 2438 | ++p; |
45d6a902 AM |
2439 | |
2440 | /* If there is no version string, we can just return out. */ | |
2441 | if (*p == '\0') | |
0a1b45a2 | 2442 | return true; |
45d6a902 | 2443 | |
099bb8fb | 2444 | if (!_bfd_elf_link_hide_versioned_symbol (info, h, p, &t, &hide)) |
45d6a902 | 2445 | { |
0a1b45a2 AM |
2446 | sinfo->failed = true; |
2447 | return false; | |
45d6a902 AM |
2448 | } |
2449 | ||
099bb8fb | 2450 | if (hide) |
0a1b45a2 | 2451 | (*bed->elf_backend_hide_symbol) (info, h, true); |
099bb8fb | 2452 | |
45d6a902 AM |
2453 | /* If we are building an application, we need to create a |
2454 | version node for this version. */ | |
0e1862bb | 2455 | if (t == NULL && bfd_link_executable (info)) |
45d6a902 AM |
2456 | { |
2457 | struct bfd_elf_version_tree **pp; | |
2458 | int version_index; | |
2459 | ||
2460 | /* If we aren't going to export this symbol, we don't need | |
2461 | to worry about it. */ | |
2462 | if (h->dynindx == -1) | |
0a1b45a2 | 2463 | return true; |
45d6a902 | 2464 | |
ef53be89 AM |
2465 | t = (struct bfd_elf_version_tree *) bfd_zalloc (info->output_bfd, |
2466 | sizeof *t); | |
45d6a902 AM |
2467 | if (t == NULL) |
2468 | { | |
0a1b45a2 AM |
2469 | sinfo->failed = true; |
2470 | return false; | |
45d6a902 AM |
2471 | } |
2472 | ||
45d6a902 | 2473 | t->name = p; |
45d6a902 | 2474 | t->name_indx = (unsigned int) -1; |
0a1b45a2 | 2475 | t->used = true; |
45d6a902 AM |
2476 | |
2477 | version_index = 1; | |
2478 | /* Don't count anonymous version tag. */ | |
fd91d419 L |
2479 | if (sinfo->info->version_info != NULL |
2480 | && sinfo->info->version_info->vernum == 0) | |
45d6a902 | 2481 | version_index = 0; |
fd91d419 L |
2482 | for (pp = &sinfo->info->version_info; |
2483 | *pp != NULL; | |
2484 | pp = &(*pp)->next) | |
45d6a902 AM |
2485 | ++version_index; |
2486 | t->vernum = version_index; | |
2487 | ||
2488 | *pp = t; | |
2489 | ||
2490 | h->verinfo.vertree = t; | |
2491 | } | |
2492 | else if (t == NULL) | |
2493 | { | |
2494 | /* We could not find the version for a symbol when | |
2495 | generating a shared archive. Return an error. */ | |
4eca0228 | 2496 | _bfd_error_handler |
695344c0 | 2497 | /* xgettext:c-format */ |
871b3ab2 | 2498 | (_("%pB: version node not found for symbol %s"), |
28caa186 | 2499 | info->output_bfd, h->root.root.string); |
45d6a902 | 2500 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 AM |
2501 | sinfo->failed = true; |
2502 | return false; | |
45d6a902 | 2503 | } |
45d6a902 AM |
2504 | } |
2505 | ||
2506 | /* If we don't have a version for this symbol, see if we can find | |
2507 | something. */ | |
099bb8fb L |
2508 | if (!hide |
2509 | && h->verinfo.vertree == NULL | |
2510 | && sinfo->info->version_info != NULL) | |
45d6a902 | 2511 | { |
fd91d419 L |
2512 | h->verinfo.vertree |
2513 | = bfd_find_version_for_sym (sinfo->info->version_info, | |
2514 | h->root.root.string, &hide); | |
1e8fa21e | 2515 | if (h->verinfo.vertree != NULL && hide) |
0a1b45a2 | 2516 | (*bed->elf_backend_hide_symbol) (info, h, true); |
45d6a902 AM |
2517 | } |
2518 | ||
0a1b45a2 | 2519 | return true; |
45d6a902 AM |
2520 | } |
2521 | \f | |
45d6a902 AM |
2522 | /* Read and swap the relocs from the section indicated by SHDR. This |
2523 | may be either a REL or a RELA section. The relocations are | |
2524 | translated into RELA relocations and stored in INTERNAL_RELOCS, | |
2525 | which should have already been allocated to contain enough space. | |
2526 | The EXTERNAL_RELOCS are a buffer where the external form of the | |
2527 | relocations should be stored. | |
2528 | ||
2529 | Returns FALSE if something goes wrong. */ | |
2530 | ||
0a1b45a2 | 2531 | static bool |
268b6b39 | 2532 | elf_link_read_relocs_from_section (bfd *abfd, |
243ef1e0 | 2533 | asection *sec, |
268b6b39 AM |
2534 | Elf_Internal_Shdr *shdr, |
2535 | void *external_relocs, | |
2536 | Elf_Internal_Rela *internal_relocs) | |
45d6a902 | 2537 | { |
9c5bfbb7 | 2538 | const struct elf_backend_data *bed; |
268b6b39 | 2539 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
45d6a902 AM |
2540 | const bfd_byte *erela; |
2541 | const bfd_byte *erelaend; | |
2542 | Elf_Internal_Rela *irela; | |
243ef1e0 L |
2543 | Elf_Internal_Shdr *symtab_hdr; |
2544 | size_t nsyms; | |
45d6a902 | 2545 | |
45d6a902 AM |
2546 | /* Position ourselves at the start of the section. */ |
2547 | if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0) | |
0a1b45a2 | 2548 | return false; |
45d6a902 AM |
2549 | |
2550 | /* Read the relocations. */ | |
2551 | if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size) | |
0a1b45a2 | 2552 | return false; |
45d6a902 | 2553 | |
243ef1e0 | 2554 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
ce98a316 | 2555 | nsyms = NUM_SHDR_ENTRIES (symtab_hdr); |
243ef1e0 | 2556 | |
45d6a902 AM |
2557 | bed = get_elf_backend_data (abfd); |
2558 | ||
2559 | /* Convert the external relocations to the internal format. */ | |
2560 | if (shdr->sh_entsize == bed->s->sizeof_rel) | |
2561 | swap_in = bed->s->swap_reloc_in; | |
2562 | else if (shdr->sh_entsize == bed->s->sizeof_rela) | |
2563 | swap_in = bed->s->swap_reloca_in; | |
2564 | else | |
2565 | { | |
2566 | bfd_set_error (bfd_error_wrong_format); | |
0a1b45a2 | 2567 | return false; |
45d6a902 AM |
2568 | } |
2569 | ||
a50b1753 | 2570 | erela = (const bfd_byte *) external_relocs; |
f55b1e32 AM |
2571 | /* Setting erelaend like this and comparing with <= handles case of |
2572 | a fuzzed object with sh_size not a multiple of sh_entsize. */ | |
2573 | erelaend = erela + shdr->sh_size - shdr->sh_entsize; | |
45d6a902 | 2574 | irela = internal_relocs; |
f55b1e32 | 2575 | while (erela <= erelaend) |
45d6a902 | 2576 | { |
243ef1e0 L |
2577 | bfd_vma r_symndx; |
2578 | ||
45d6a902 | 2579 | (*swap_in) (abfd, erela, irela); |
243ef1e0 L |
2580 | r_symndx = ELF32_R_SYM (irela->r_info); |
2581 | if (bed->s->arch_size == 64) | |
2582 | r_symndx >>= 24; | |
ce98a316 NC |
2583 | if (nsyms > 0) |
2584 | { | |
2585 | if ((size_t) r_symndx >= nsyms) | |
2586 | { | |
4eca0228 | 2587 | _bfd_error_handler |
695344c0 | 2588 | /* xgettext:c-format */ |
2dcf00ce AM |
2589 | (_("%pB: bad reloc symbol index (%#" PRIx64 " >= %#lx)" |
2590 | " for offset %#" PRIx64 " in section `%pA'"), | |
2591 | abfd, (uint64_t) r_symndx, (unsigned long) nsyms, | |
2592 | (uint64_t) irela->r_offset, sec); | |
ce98a316 | 2593 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 2594 | return false; |
ce98a316 NC |
2595 | } |
2596 | } | |
cf35638d | 2597 | else if (r_symndx != STN_UNDEF) |
243ef1e0 | 2598 | { |
4eca0228 | 2599 | _bfd_error_handler |
695344c0 | 2600 | /* xgettext:c-format */ |
2dcf00ce AM |
2601 | (_("%pB: non-zero symbol index (%#" PRIx64 ")" |
2602 | " for offset %#" PRIx64 " in section `%pA'" | |
ce98a316 | 2603 | " when the object file has no symbol table"), |
2dcf00ce AM |
2604 | abfd, (uint64_t) r_symndx, |
2605 | (uint64_t) irela->r_offset, sec); | |
243ef1e0 | 2606 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 2607 | return false; |
243ef1e0 | 2608 | } |
45d6a902 AM |
2609 | irela += bed->s->int_rels_per_ext_rel; |
2610 | erela += shdr->sh_entsize; | |
2611 | } | |
2612 | ||
0a1b45a2 | 2613 | return true; |
45d6a902 AM |
2614 | } |
2615 | ||
2616 | /* Read and swap the relocs for a section O. They may have been | |
2617 | cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are | |
2618 | not NULL, they are used as buffers to read into. They are known to | |
2619 | be large enough. If the INTERNAL_RELOCS relocs argument is NULL, | |
2620 | the return value is allocated using either malloc or bfd_alloc, | |
2621 | according to the KEEP_MEMORY argument. If O has two relocation | |
2622 | sections (both REL and RELA relocations), then the REL_HDR | |
2623 | relocations will appear first in INTERNAL_RELOCS, followed by the | |
d4730f92 | 2624 | RELA_HDR relocations. */ |
45d6a902 AM |
2625 | |
2626 | Elf_Internal_Rela * | |
268b6b39 AM |
2627 | _bfd_elf_link_read_relocs (bfd *abfd, |
2628 | asection *o, | |
2629 | void *external_relocs, | |
2630 | Elf_Internal_Rela *internal_relocs, | |
0a1b45a2 | 2631 | bool keep_memory) |
45d6a902 | 2632 | { |
268b6b39 | 2633 | void *alloc1 = NULL; |
45d6a902 | 2634 | Elf_Internal_Rela *alloc2 = NULL; |
9c5bfbb7 | 2635 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
d4730f92 BS |
2636 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
2637 | Elf_Internal_Rela *internal_rela_relocs; | |
45d6a902 | 2638 | |
d4730f92 BS |
2639 | if (esdo->relocs != NULL) |
2640 | return esdo->relocs; | |
45d6a902 AM |
2641 | |
2642 | if (o->reloc_count == 0) | |
2643 | return NULL; | |
2644 | ||
45d6a902 AM |
2645 | if (internal_relocs == NULL) |
2646 | { | |
2647 | bfd_size_type size; | |
2648 | ||
056bafd4 | 2649 | size = (bfd_size_type) o->reloc_count * sizeof (Elf_Internal_Rela); |
45d6a902 | 2650 | if (keep_memory) |
a50b1753 | 2651 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_alloc (abfd, size); |
45d6a902 | 2652 | else |
a50b1753 | 2653 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); |
45d6a902 AM |
2654 | if (internal_relocs == NULL) |
2655 | goto error_return; | |
2656 | } | |
2657 | ||
2658 | if (external_relocs == NULL) | |
2659 | { | |
d4730f92 BS |
2660 | bfd_size_type size = 0; |
2661 | ||
2662 | if (esdo->rel.hdr) | |
2663 | size += esdo->rel.hdr->sh_size; | |
2664 | if (esdo->rela.hdr) | |
2665 | size += esdo->rela.hdr->sh_size; | |
45d6a902 | 2666 | |
268b6b39 | 2667 | alloc1 = bfd_malloc (size); |
45d6a902 AM |
2668 | if (alloc1 == NULL) |
2669 | goto error_return; | |
2670 | external_relocs = alloc1; | |
2671 | } | |
2672 | ||
d4730f92 BS |
2673 | internal_rela_relocs = internal_relocs; |
2674 | if (esdo->rel.hdr) | |
2675 | { | |
2676 | if (!elf_link_read_relocs_from_section (abfd, o, esdo->rel.hdr, | |
2677 | external_relocs, | |
2678 | internal_relocs)) | |
2679 | goto error_return; | |
2680 | external_relocs = (((bfd_byte *) external_relocs) | |
2681 | + esdo->rel.hdr->sh_size); | |
2682 | internal_rela_relocs += (NUM_SHDR_ENTRIES (esdo->rel.hdr) | |
2683 | * bed->s->int_rels_per_ext_rel); | |
2684 | } | |
2685 | ||
2686 | if (esdo->rela.hdr | |
2687 | && (!elf_link_read_relocs_from_section (abfd, o, esdo->rela.hdr, | |
2688 | external_relocs, | |
2689 | internal_rela_relocs))) | |
45d6a902 AM |
2690 | goto error_return; |
2691 | ||
2692 | /* Cache the results for next time, if we can. */ | |
2693 | if (keep_memory) | |
d4730f92 | 2694 | esdo->relocs = internal_relocs; |
45d6a902 | 2695 | |
c9594989 | 2696 | free (alloc1); |
45d6a902 AM |
2697 | |
2698 | /* Don't free alloc2, since if it was allocated we are passing it | |
2699 | back (under the name of internal_relocs). */ | |
2700 | ||
2701 | return internal_relocs; | |
2702 | ||
2703 | error_return: | |
c9594989 | 2704 | free (alloc1); |
45d6a902 | 2705 | if (alloc2 != NULL) |
4dd07732 AM |
2706 | { |
2707 | if (keep_memory) | |
2708 | bfd_release (abfd, alloc2); | |
2709 | else | |
2710 | free (alloc2); | |
2711 | } | |
45d6a902 AM |
2712 | return NULL; |
2713 | } | |
2714 | ||
2715 | /* Compute the size of, and allocate space for, REL_HDR which is the | |
2716 | section header for a section containing relocations for O. */ | |
2717 | ||
0a1b45a2 | 2718 | static bool |
9eaff861 AO |
2719 | _bfd_elf_link_size_reloc_section (bfd *abfd, |
2720 | struct bfd_elf_section_reloc_data *reldata) | |
45d6a902 | 2721 | { |
9eaff861 | 2722 | Elf_Internal_Shdr *rel_hdr = reldata->hdr; |
45d6a902 AM |
2723 | |
2724 | /* That allows us to calculate the size of the section. */ | |
9eaff861 | 2725 | rel_hdr->sh_size = rel_hdr->sh_entsize * reldata->count; |
45d6a902 AM |
2726 | |
2727 | /* The contents field must last into write_object_contents, so we | |
2728 | allocate it with bfd_alloc rather than malloc. Also since we | |
2729 | cannot be sure that the contents will actually be filled in, | |
2730 | we zero the allocated space. */ | |
a50b1753 | 2731 | rel_hdr->contents = (unsigned char *) bfd_zalloc (abfd, rel_hdr->sh_size); |
45d6a902 | 2732 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) |
0a1b45a2 | 2733 | return false; |
45d6a902 | 2734 | |
d4730f92 | 2735 | if (reldata->hashes == NULL && reldata->count) |
45d6a902 AM |
2736 | { |
2737 | struct elf_link_hash_entry **p; | |
2738 | ||
ca4be51c AM |
2739 | p = ((struct elf_link_hash_entry **) |
2740 | bfd_zmalloc (reldata->count * sizeof (*p))); | |
45d6a902 | 2741 | if (p == NULL) |
0a1b45a2 | 2742 | return false; |
45d6a902 | 2743 | |
d4730f92 | 2744 | reldata->hashes = p; |
45d6a902 AM |
2745 | } |
2746 | ||
0a1b45a2 | 2747 | return true; |
45d6a902 AM |
2748 | } |
2749 | ||
2750 | /* Copy the relocations indicated by the INTERNAL_RELOCS (which | |
2751 | originated from the section given by INPUT_REL_HDR) to the | |
2752 | OUTPUT_BFD. */ | |
2753 | ||
0a1b45a2 | 2754 | bool |
268b6b39 AM |
2755 | _bfd_elf_link_output_relocs (bfd *output_bfd, |
2756 | asection *input_section, | |
2757 | Elf_Internal_Shdr *input_rel_hdr, | |
eac338cf PB |
2758 | Elf_Internal_Rela *internal_relocs, |
2759 | struct elf_link_hash_entry **rel_hash | |
2760 | ATTRIBUTE_UNUSED) | |
45d6a902 AM |
2761 | { |
2762 | Elf_Internal_Rela *irela; | |
2763 | Elf_Internal_Rela *irelaend; | |
2764 | bfd_byte *erel; | |
d4730f92 | 2765 | struct bfd_elf_section_reloc_data *output_reldata; |
45d6a902 | 2766 | asection *output_section; |
9c5bfbb7 | 2767 | const struct elf_backend_data *bed; |
268b6b39 | 2768 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
d4730f92 | 2769 | struct bfd_elf_section_data *esdo; |
45d6a902 AM |
2770 | |
2771 | output_section = input_section->output_section; | |
45d6a902 | 2772 | |
d4730f92 BS |
2773 | bed = get_elf_backend_data (output_bfd); |
2774 | esdo = elf_section_data (output_section); | |
2775 | if (esdo->rel.hdr && esdo->rel.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2776 | { |
d4730f92 BS |
2777 | output_reldata = &esdo->rel; |
2778 | swap_out = bed->s->swap_reloc_out; | |
45d6a902 | 2779 | } |
d4730f92 BS |
2780 | else if (esdo->rela.hdr |
2781 | && esdo->rela.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2782 | { |
d4730f92 BS |
2783 | output_reldata = &esdo->rela; |
2784 | swap_out = bed->s->swap_reloca_out; | |
45d6a902 AM |
2785 | } |
2786 | else | |
2787 | { | |
4eca0228 | 2788 | _bfd_error_handler |
695344c0 | 2789 | /* xgettext:c-format */ |
871b3ab2 | 2790 | (_("%pB: relocation size mismatch in %pB section %pA"), |
d003868e | 2791 | output_bfd, input_section->owner, input_section); |
297d8443 | 2792 | bfd_set_error (bfd_error_wrong_format); |
0a1b45a2 | 2793 | return false; |
45d6a902 AM |
2794 | } |
2795 | ||
d4730f92 BS |
2796 | erel = output_reldata->hdr->contents; |
2797 | erel += output_reldata->count * input_rel_hdr->sh_entsize; | |
45d6a902 AM |
2798 | irela = internal_relocs; |
2799 | irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) | |
2800 | * bed->s->int_rels_per_ext_rel); | |
2801 | while (irela < irelaend) | |
2802 | { | |
2803 | (*swap_out) (output_bfd, irela, erel); | |
2804 | irela += bed->s->int_rels_per_ext_rel; | |
2805 | erel += input_rel_hdr->sh_entsize; | |
2806 | } | |
2807 | ||
2808 | /* Bump the counter, so that we know where to add the next set of | |
2809 | relocations. */ | |
d4730f92 | 2810 | output_reldata->count += NUM_SHDR_ENTRIES (input_rel_hdr); |
45d6a902 | 2811 | |
0a1b45a2 | 2812 | return true; |
45d6a902 AM |
2813 | } |
2814 | \f | |
508c3946 L |
2815 | /* Make weak undefined symbols in PIE dynamic. */ |
2816 | ||
0a1b45a2 | 2817 | bool |
508c3946 L |
2818 | _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info *info, |
2819 | struct elf_link_hash_entry *h) | |
2820 | { | |
0e1862bb | 2821 | if (bfd_link_pie (info) |
508c3946 L |
2822 | && h->dynindx == -1 |
2823 | && h->root.type == bfd_link_hash_undefweak) | |
2824 | return bfd_elf_link_record_dynamic_symbol (info, h); | |
2825 | ||
0a1b45a2 | 2826 | return true; |
508c3946 L |
2827 | } |
2828 | ||
45d6a902 AM |
2829 | /* Fix up the flags for a symbol. This handles various cases which |
2830 | can only be fixed after all the input files are seen. This is | |
2831 | currently called by both adjust_dynamic_symbol and | |
2832 | assign_sym_version, which is unnecessary but perhaps more robust in | |
2833 | the face of future changes. */ | |
2834 | ||
0a1b45a2 | 2835 | static bool |
268b6b39 AM |
2836 | _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry *h, |
2837 | struct elf_info_failed *eif) | |
45d6a902 | 2838 | { |
33774f08 | 2839 | const struct elf_backend_data *bed; |
508c3946 | 2840 | |
45d6a902 AM |
2841 | /* If this symbol was mentioned in a non-ELF file, try to set |
2842 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
2843 | permit a non-ELF file to correctly refer to a symbol defined in | |
2844 | an ELF dynamic object. */ | |
f5385ebf | 2845 | if (h->non_elf) |
45d6a902 AM |
2846 | { |
2847 | while (h->root.type == bfd_link_hash_indirect) | |
2848 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2849 | ||
2850 | if (h->root.type != bfd_link_hash_defined | |
2851 | && h->root.type != bfd_link_hash_defweak) | |
f5385ebf AM |
2852 | { |
2853 | h->ref_regular = 1; | |
2854 | h->ref_regular_nonweak = 1; | |
2855 | } | |
45d6a902 AM |
2856 | else |
2857 | { | |
2858 | if (h->root.u.def.section->owner != NULL | |
2859 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
2860 | == bfd_target_elf_flavour)) | |
f5385ebf AM |
2861 | { |
2862 | h->ref_regular = 1; | |
2863 | h->ref_regular_nonweak = 1; | |
2864 | } | |
45d6a902 | 2865 | else |
f5385ebf | 2866 | h->def_regular = 1; |
45d6a902 AM |
2867 | } |
2868 | ||
2869 | if (h->dynindx == -1 | |
f5385ebf AM |
2870 | && (h->def_dynamic |
2871 | || h->ref_dynamic)) | |
45d6a902 | 2872 | { |
c152c796 | 2873 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 | 2874 | { |
0a1b45a2 AM |
2875 | eif->failed = true; |
2876 | return false; | |
45d6a902 AM |
2877 | } |
2878 | } | |
2879 | } | |
2880 | else | |
2881 | { | |
f5385ebf | 2882 | /* Unfortunately, NON_ELF is only correct if the symbol |
45d6a902 AM |
2883 | was first seen in a non-ELF file. Fortunately, if the symbol |
2884 | was first seen in an ELF file, we're probably OK unless the | |
2885 | symbol was defined in a non-ELF file. Catch that case here. | |
2886 | FIXME: We're still in trouble if the symbol was first seen in | |
2887 | a dynamic object, and then later in a non-ELF regular object. */ | |
2888 | if ((h->root.type == bfd_link_hash_defined | |
2889 | || h->root.type == bfd_link_hash_defweak) | |
f5385ebf | 2890 | && !h->def_regular |
45d6a902 AM |
2891 | && (h->root.u.def.section->owner != NULL |
2892 | ? (bfd_get_flavour (h->root.u.def.section->owner) | |
2893 | != bfd_target_elf_flavour) | |
2894 | : (bfd_is_abs_section (h->root.u.def.section) | |
f5385ebf AM |
2895 | && !h->def_dynamic))) |
2896 | h->def_regular = 1; | |
45d6a902 AM |
2897 | } |
2898 | ||
508c3946 | 2899 | /* Backend specific symbol fixup. */ |
33774f08 AM |
2900 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); |
2901 | if (bed->elf_backend_fixup_symbol | |
2902 | && !(*bed->elf_backend_fixup_symbol) (eif->info, h)) | |
0a1b45a2 | 2903 | return false; |
508c3946 | 2904 | |
45d6a902 AM |
2905 | /* If this is a final link, and the symbol was defined as a common |
2906 | symbol in a regular object file, and there was no definition in | |
2907 | any dynamic object, then the linker will have allocated space for | |
f5385ebf | 2908 | the symbol in a common section but the DEF_REGULAR |
45d6a902 AM |
2909 | flag will not have been set. */ |
2910 | if (h->root.type == bfd_link_hash_defined | |
f5385ebf AM |
2911 | && !h->def_regular |
2912 | && h->ref_regular | |
2913 | && !h->def_dynamic | |
96f29d96 | 2914 | && (h->root.u.def.section->owner->flags & (DYNAMIC | BFD_PLUGIN)) == 0) |
f5385ebf | 2915 | h->def_regular = 1; |
45d6a902 | 2916 | |
af0bfb9c AM |
2917 | /* Symbols defined in discarded sections shouldn't be dynamic. */ |
2918 | if (h->root.type == bfd_link_hash_undefined && h->indx == -3) | |
0a1b45a2 | 2919 | (*bed->elf_backend_hide_symbol) (eif->info, h, true); |
af0bfb9c | 2920 | |
4deb8f71 L |
2921 | /* If a weak undefined symbol has non-default visibility, we also |
2922 | hide it from the dynamic linker. */ | |
af0bfb9c AM |
2923 | else if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
2924 | && h->root.type == bfd_link_hash_undefweak) | |
0a1b45a2 | 2925 | (*bed->elf_backend_hide_symbol) (eif->info, h, true); |
4deb8f71 L |
2926 | |
2927 | /* A hidden versioned symbol in executable should be forced local if | |
2928 | it is is locally defined, not referenced by shared library and not | |
2929 | exported. */ | |
2930 | else if (bfd_link_executable (eif->info) | |
2931 | && h->versioned == versioned_hidden | |
2932 | && !eif->info->export_dynamic | |
2933 | && !h->dynamic | |
2934 | && !h->ref_dynamic | |
2935 | && h->def_regular) | |
0a1b45a2 | 2936 | (*bed->elf_backend_hide_symbol) (eif->info, h, true); |
4deb8f71 | 2937 | |
45d6a902 AM |
2938 | /* If -Bsymbolic was used (which means to bind references to global |
2939 | symbols to the definition within the shared object), and this | |
2940 | symbol was defined in a regular object, then it actually doesn't | |
9c7a29a3 AM |
2941 | need a PLT entry. Likewise, if the symbol has non-default |
2942 | visibility. If the symbol has hidden or internal visibility, we | |
c1be741f | 2943 | will force it local. */ |
4deb8f71 L |
2944 | else if (h->needs_plt |
2945 | && bfd_link_pic (eif->info) | |
2946 | && is_elf_hash_table (eif->info->hash) | |
2947 | && (SYMBOLIC_BIND (eif->info, h) | |
2948 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2949 | && h->def_regular) | |
45d6a902 | 2950 | { |
0a1b45a2 | 2951 | bool force_local; |
45d6a902 | 2952 | |
45d6a902 AM |
2953 | force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL |
2954 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN); | |
2955 | (*bed->elf_backend_hide_symbol) (eif->info, h, force_local); | |
2956 | } | |
2957 | ||
45d6a902 AM |
2958 | /* If this is a weak defined symbol in a dynamic object, and we know |
2959 | the real definition in the dynamic object, copy interesting flags | |
2960 | over to the real definition. */ | |
60d67dc8 | 2961 | if (h->is_weakalias) |
45d6a902 | 2962 | { |
60d67dc8 AM |
2963 | struct elf_link_hash_entry *def = weakdef (h); |
2964 | ||
45d6a902 AM |
2965 | /* If the real definition is defined by a regular object file, |
2966 | don't do anything special. See the longer description in | |
5b9d7a9a AM |
2967 | _bfd_elf_adjust_dynamic_symbol, below. If the def is not |
2968 | bfd_link_hash_defined as it was when put on the alias list | |
2969 | then it must have originally been a versioned symbol (for | |
2970 | which a non-versioned indirect symbol is created) and later | |
2971 | a definition for the non-versioned symbol is found. In that | |
2972 | case the indirection is flipped with the versioned symbol | |
2973 | becoming an indirect pointing at the non-versioned symbol. | |
2974 | Thus, not an alias any more. */ | |
2975 | if (def->def_regular | |
2976 | || def->root.type != bfd_link_hash_defined) | |
60d67dc8 AM |
2977 | { |
2978 | h = def; | |
2979 | while ((h = h->u.alias) != def) | |
2980 | h->is_weakalias = 0; | |
2981 | } | |
45d6a902 | 2982 | else |
a26587ba | 2983 | { |
4e6b54a6 AM |
2984 | while (h->root.type == bfd_link_hash_indirect) |
2985 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4e6b54a6 AM |
2986 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
2987 | || h->root.type == bfd_link_hash_defweak); | |
60d67dc8 | 2988 | BFD_ASSERT (def->def_dynamic); |
60d67dc8 | 2989 | (*bed->elf_backend_copy_indirect_symbol) (eif->info, def, h); |
a26587ba | 2990 | } |
45d6a902 AM |
2991 | } |
2992 | ||
0a1b45a2 | 2993 | return true; |
45d6a902 AM |
2994 | } |
2995 | ||
2996 | /* Make the backend pick a good value for a dynamic symbol. This is | |
2997 | called via elf_link_hash_traverse, and also calls itself | |
2998 | recursively. */ | |
2999 | ||
0a1b45a2 | 3000 | static bool |
268b6b39 | 3001 | _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 3002 | { |
a50b1753 | 3003 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
559192d8 | 3004 | struct elf_link_hash_table *htab; |
9c5bfbb7 | 3005 | const struct elf_backend_data *bed; |
45d6a902 | 3006 | |
0eddce27 | 3007 | if (! is_elf_hash_table (eif->info->hash)) |
0a1b45a2 | 3008 | return false; |
45d6a902 | 3009 | |
45d6a902 AM |
3010 | /* Ignore indirect symbols. These are added by the versioning code. */ |
3011 | if (h->root.type == bfd_link_hash_indirect) | |
0a1b45a2 | 3012 | return true; |
45d6a902 AM |
3013 | |
3014 | /* Fix the symbol flags. */ | |
3015 | if (! _bfd_elf_fix_symbol_flags (h, eif)) | |
0a1b45a2 | 3016 | return false; |
45d6a902 | 3017 | |
559192d8 AM |
3018 | htab = elf_hash_table (eif->info); |
3019 | bed = get_elf_backend_data (htab->dynobj); | |
3020 | ||
954b63d4 AM |
3021 | if (h->root.type == bfd_link_hash_undefweak) |
3022 | { | |
3023 | if (eif->info->dynamic_undefined_weak == 0) | |
0a1b45a2 | 3024 | (*bed->elf_backend_hide_symbol) (eif->info, h, true); |
954b63d4 AM |
3025 | else if (eif->info->dynamic_undefined_weak > 0 |
3026 | && h->ref_regular | |
3027 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3028 | && !bfd_hide_sym_by_version (eif->info->version_info, | |
3029 | h->root.root.string)) | |
3030 | { | |
3031 | if (!bfd_elf_link_record_dynamic_symbol (eif->info, h)) | |
3032 | { | |
0a1b45a2 AM |
3033 | eif->failed = true; |
3034 | return false; | |
954b63d4 AM |
3035 | } |
3036 | } | |
3037 | } | |
3038 | ||
45d6a902 AM |
3039 | /* If this symbol does not require a PLT entry, and it is not |
3040 | defined by a dynamic object, or is not referenced by a regular | |
3041 | object, ignore it. We do have to handle a weak defined symbol, | |
3042 | even if no regular object refers to it, if we decided to add it | |
3043 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
3044 | about symbols which are defined by one dynamic object and | |
3045 | referenced by another one? */ | |
f5385ebf | 3046 | if (!h->needs_plt |
91e21fb7 | 3047 | && h->type != STT_GNU_IFUNC |
f5385ebf AM |
3048 | && (h->def_regular |
3049 | || !h->def_dynamic | |
3050 | || (!h->ref_regular | |
60d67dc8 | 3051 | && (!h->is_weakalias || weakdef (h)->dynindx == -1)))) |
45d6a902 | 3052 | { |
a6aa5195 | 3053 | h->plt = elf_hash_table (eif->info)->init_plt_offset; |
0a1b45a2 | 3054 | return true; |
45d6a902 AM |
3055 | } |
3056 | ||
3057 | /* If we've already adjusted this symbol, don't do it again. This | |
3058 | can happen via a recursive call. */ | |
f5385ebf | 3059 | if (h->dynamic_adjusted) |
0a1b45a2 | 3060 | return true; |
45d6a902 AM |
3061 | |
3062 | /* Don't look at this symbol again. Note that we must set this | |
3063 | after checking the above conditions, because we may look at a | |
3064 | symbol once, decide not to do anything, and then get called | |
3065 | recursively later after REF_REGULAR is set below. */ | |
f5385ebf | 3066 | h->dynamic_adjusted = 1; |
45d6a902 AM |
3067 | |
3068 | /* If this is a weak definition, and we know a real definition, and | |
3069 | the real symbol is not itself defined by a regular object file, | |
3070 | then get a good value for the real definition. We handle the | |
3071 | real symbol first, for the convenience of the backend routine. | |
3072 | ||
3073 | Note that there is a confusing case here. If the real definition | |
3074 | is defined by a regular object file, we don't get the real symbol | |
3075 | from the dynamic object, but we do get the weak symbol. If the | |
3076 | processor backend uses a COPY reloc, then if some routine in the | |
3077 | dynamic object changes the real symbol, we will not see that | |
3078 | change in the corresponding weak symbol. This is the way other | |
3079 | ELF linkers work as well, and seems to be a result of the shared | |
3080 | library model. | |
3081 | ||
3082 | I will clarify this issue. Most SVR4 shared libraries define the | |
3083 | variable _timezone and define timezone as a weak synonym. The | |
3084 | tzset call changes _timezone. If you write | |
3085 | extern int timezone; | |
3086 | int _timezone = 5; | |
3087 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
3088 | you might expect that, since timezone is a synonym for _timezone, | |
3089 | the same number will print both times. However, if the processor | |
3090 | backend uses a COPY reloc, then actually timezone will be copied | |
3091 | into your process image, and, since you define _timezone | |
3092 | yourself, _timezone will not. Thus timezone and _timezone will | |
3093 | wind up at different memory locations. The tzset call will set | |
3094 | _timezone, leaving timezone unchanged. */ | |
3095 | ||
60d67dc8 | 3096 | if (h->is_weakalias) |
45d6a902 | 3097 | { |
60d67dc8 AM |
3098 | struct elf_link_hash_entry *def = weakdef (h); |
3099 | ||
ec24dc88 | 3100 | /* If we get to this point, there is an implicit reference to |
60d67dc8 AM |
3101 | the alias by a regular object file via the weak symbol H. */ |
3102 | def->ref_regular = 1; | |
45d6a902 | 3103 | |
ec24dc88 | 3104 | /* Ensure that the backend adjust_dynamic_symbol function sees |
60d67dc8 AM |
3105 | the strong alias before H by recursively calling ourselves. */ |
3106 | if (!_bfd_elf_adjust_dynamic_symbol (def, eif)) | |
0a1b45a2 | 3107 | return false; |
45d6a902 AM |
3108 | } |
3109 | ||
3110 | /* If a symbol has no type and no size and does not require a PLT | |
3111 | entry, then we are probably about to do the wrong thing here: we | |
3112 | are probably going to create a COPY reloc for an empty object. | |
3113 | This case can arise when a shared object is built with assembly | |
3114 | code, and the assembly code fails to set the symbol type. */ | |
3115 | if (h->size == 0 | |
3116 | && h->type == STT_NOTYPE | |
f5385ebf | 3117 | && !h->needs_plt) |
4eca0228 | 3118 | _bfd_error_handler |
45d6a902 AM |
3119 | (_("warning: type and size of dynamic symbol `%s' are not defined"), |
3120 | h->root.root.string); | |
3121 | ||
45d6a902 AM |
3122 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) |
3123 | { | |
0a1b45a2 AM |
3124 | eif->failed = true; |
3125 | return false; | |
45d6a902 AM |
3126 | } |
3127 | ||
0a1b45a2 | 3128 | return true; |
45d6a902 AM |
3129 | } |
3130 | ||
027297b7 L |
3131 | /* Adjust the dynamic symbol, H, for copy in the dynamic bss section, |
3132 | DYNBSS. */ | |
3133 | ||
0a1b45a2 | 3134 | bool |
6cabe1ea AM |
3135 | _bfd_elf_adjust_dynamic_copy (struct bfd_link_info *info, |
3136 | struct elf_link_hash_entry *h, | |
027297b7 L |
3137 | asection *dynbss) |
3138 | { | |
91ac5911 | 3139 | unsigned int power_of_two; |
027297b7 L |
3140 | bfd_vma mask; |
3141 | asection *sec = h->root.u.def.section; | |
3142 | ||
de194d85 | 3143 | /* The section alignment of the definition is the maximum alignment |
91ac5911 L |
3144 | requirement of symbols defined in the section. Since we don't |
3145 | know the symbol alignment requirement, we start with the | |
3146 | maximum alignment and check low bits of the symbol address | |
3147 | for the minimum alignment. */ | |
fd361982 | 3148 | power_of_two = bfd_section_alignment (sec); |
91ac5911 L |
3149 | mask = ((bfd_vma) 1 << power_of_two) - 1; |
3150 | while ((h->root.u.def.value & mask) != 0) | |
3151 | { | |
3152 | mask >>= 1; | |
3153 | --power_of_two; | |
3154 | } | |
027297b7 | 3155 | |
fd361982 | 3156 | if (power_of_two > bfd_section_alignment (dynbss)) |
027297b7 L |
3157 | { |
3158 | /* Adjust the section alignment if needed. */ | |
fd361982 | 3159 | if (!bfd_set_section_alignment (dynbss, power_of_two)) |
0a1b45a2 | 3160 | return false; |
027297b7 L |
3161 | } |
3162 | ||
91ac5911 | 3163 | /* We make sure that the symbol will be aligned properly. */ |
027297b7 L |
3164 | dynbss->size = BFD_ALIGN (dynbss->size, mask + 1); |
3165 | ||
3166 | /* Define the symbol as being at this point in DYNBSS. */ | |
3167 | h->root.u.def.section = dynbss; | |
3168 | h->root.u.def.value = dynbss->size; | |
3169 | ||
3170 | /* Increment the size of DYNBSS to make room for the symbol. */ | |
3171 | dynbss->size += h->size; | |
3172 | ||
f7483970 L |
3173 | /* No error if extern_protected_data is true. */ |
3174 | if (h->protected_def | |
889c2a67 L |
3175 | && (!info->extern_protected_data |
3176 | || (info->extern_protected_data < 0 | |
3177 | && !get_elf_backend_data (dynbss->owner)->extern_protected_data))) | |
d07a1b05 | 3178 | info->callbacks->einfo |
c1c8c1ef | 3179 | (_("%P: copy reloc against protected `%pT' is dangerous\n"), |
d07a1b05 | 3180 | h->root.root.string); |
6cabe1ea | 3181 | |
0a1b45a2 | 3182 | return true; |
027297b7 L |
3183 | } |
3184 | ||
45d6a902 AM |
3185 | /* Adjust all external symbols pointing into SEC_MERGE sections |
3186 | to reflect the object merging within the sections. */ | |
3187 | ||
0a1b45a2 | 3188 | static bool |
268b6b39 | 3189 | _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry *h, void *data) |
45d6a902 AM |
3190 | { |
3191 | asection *sec; | |
3192 | ||
45d6a902 AM |
3193 | if ((h->root.type == bfd_link_hash_defined |
3194 | || h->root.type == bfd_link_hash_defweak) | |
3195 | && ((sec = h->root.u.def.section)->flags & SEC_MERGE) | |
dbaa2011 | 3196 | && sec->sec_info_type == SEC_INFO_TYPE_MERGE) |
45d6a902 | 3197 | { |
a50b1753 | 3198 | bfd *output_bfd = (bfd *) data; |
45d6a902 AM |
3199 | |
3200 | h->root.u.def.value = | |
3201 | _bfd_merged_section_offset (output_bfd, | |
3202 | &h->root.u.def.section, | |
3203 | elf_section_data (sec)->sec_info, | |
753731ee | 3204 | h->root.u.def.value); |
45d6a902 AM |
3205 | } |
3206 | ||
0a1b45a2 | 3207 | return true; |
45d6a902 | 3208 | } |
986a241f RH |
3209 | |
3210 | /* Returns false if the symbol referred to by H should be considered | |
3211 | to resolve local to the current module, and true if it should be | |
3212 | considered to bind dynamically. */ | |
3213 | ||
0a1b45a2 | 3214 | bool |
268b6b39 AM |
3215 | _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, |
3216 | struct bfd_link_info *info, | |
0a1b45a2 | 3217 | bool not_local_protected) |
986a241f | 3218 | { |
0a1b45a2 | 3219 | bool binding_stays_local_p; |
fcb93ecf PB |
3220 | const struct elf_backend_data *bed; |
3221 | struct elf_link_hash_table *hash_table; | |
986a241f RH |
3222 | |
3223 | if (h == NULL) | |
0a1b45a2 | 3224 | return false; |
986a241f RH |
3225 | |
3226 | while (h->root.type == bfd_link_hash_indirect | |
3227 | || h->root.type == bfd_link_hash_warning) | |
3228 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3229 | ||
3230 | /* If it was forced local, then clearly it's not dynamic. */ | |
3231 | if (h->dynindx == -1) | |
0a1b45a2 | 3232 | return false; |
f5385ebf | 3233 | if (h->forced_local) |
0a1b45a2 | 3234 | return false; |
986a241f RH |
3235 | |
3236 | /* Identify the cases where name binding rules say that a | |
3237 | visible symbol resolves locally. */ | |
0e1862bb L |
3238 | binding_stays_local_p = (bfd_link_executable (info) |
3239 | || SYMBOLIC_BIND (info, h)); | |
986a241f RH |
3240 | |
3241 | switch (ELF_ST_VISIBILITY (h->other)) | |
3242 | { | |
3243 | case STV_INTERNAL: | |
3244 | case STV_HIDDEN: | |
0a1b45a2 | 3245 | return false; |
986a241f RH |
3246 | |
3247 | case STV_PROTECTED: | |
fcb93ecf PB |
3248 | hash_table = elf_hash_table (info); |
3249 | if (!is_elf_hash_table (hash_table)) | |
0a1b45a2 | 3250 | return false; |
fcb93ecf PB |
3251 | |
3252 | bed = get_elf_backend_data (hash_table->dynobj); | |
3253 | ||
986a241f RH |
3254 | /* Proper resolution for function pointer equality may require |
3255 | that these symbols perhaps be resolved dynamically, even though | |
3256 | we should be resolving them to the current module. */ | |
89a2ee5a | 3257 | if (!not_local_protected || !bed->is_function_type (h->type)) |
0a1b45a2 | 3258 | binding_stays_local_p = true; |
986a241f RH |
3259 | break; |
3260 | ||
3261 | default: | |
986a241f RH |
3262 | break; |
3263 | } | |
3264 | ||
aa37626c | 3265 | /* If it isn't defined locally, then clearly it's dynamic. */ |
89a2ee5a | 3266 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
0a1b45a2 | 3267 | return true; |
aa37626c | 3268 | |
986a241f RH |
3269 | /* Otherwise, the symbol is dynamic if binding rules don't tell |
3270 | us that it remains local. */ | |
3271 | return !binding_stays_local_p; | |
3272 | } | |
f6c52c13 AM |
3273 | |
3274 | /* Return true if the symbol referred to by H should be considered | |
3275 | to resolve local to the current module, and false otherwise. Differs | |
3276 | from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of | |
2e76e85a | 3277 | undefined symbols. The two functions are virtually identical except |
0fad2956 MR |
3278 | for the place where dynindx == -1 is tested. If that test is true, |
3279 | _bfd_elf_dynamic_symbol_p will say the symbol is local, while | |
3280 | _bfd_elf_symbol_refs_local_p will say the symbol is local only for | |
3281 | defined symbols. | |
89a2ee5a AM |
3282 | It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as |
3283 | !_bfd_elf_symbol_refs_local_p, except that targets differ in their | |
3284 | treatment of undefined weak symbols. For those that do not make | |
3285 | undefined weak symbols dynamic, both functions may return false. */ | |
f6c52c13 | 3286 | |
0a1b45a2 | 3287 | bool |
268b6b39 AM |
3288 | _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry *h, |
3289 | struct bfd_link_info *info, | |
0a1b45a2 | 3290 | bool local_protected) |
f6c52c13 | 3291 | { |
fcb93ecf PB |
3292 | const struct elf_backend_data *bed; |
3293 | struct elf_link_hash_table *hash_table; | |
3294 | ||
f6c52c13 AM |
3295 | /* If it's a local sym, of course we resolve locally. */ |
3296 | if (h == NULL) | |
0a1b45a2 | 3297 | return true; |
f6c52c13 | 3298 | |
d95edcac L |
3299 | /* STV_HIDDEN or STV_INTERNAL ones must be local. */ |
3300 | if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
3301 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
0a1b45a2 | 3302 | return true; |
d95edcac | 3303 | |
0fad2956 MR |
3304 | /* Forced local symbols resolve locally. */ |
3305 | if (h->forced_local) | |
0a1b45a2 | 3306 | return true; |
0fad2956 | 3307 | |
7e2294f9 AO |
3308 | /* Common symbols that become definitions don't get the DEF_REGULAR |
3309 | flag set, so test it first, and don't bail out. */ | |
3310 | if (ELF_COMMON_DEF_P (h)) | |
3311 | /* Do nothing. */; | |
f6c52c13 | 3312 | /* If we don't have a definition in a regular file, then we can't |
49ff44d6 L |
3313 | resolve locally. The sym is either undefined or dynamic. */ |
3314 | else if (!h->def_regular) | |
0a1b45a2 | 3315 | return false; |
f6c52c13 | 3316 | |
0fad2956 | 3317 | /* Non-dynamic symbols resolve locally. */ |
f6c52c13 | 3318 | if (h->dynindx == -1) |
0a1b45a2 | 3319 | return true; |
f6c52c13 AM |
3320 | |
3321 | /* At this point, we know the symbol is defined and dynamic. In an | |
3322 | executable it must resolve locally, likewise when building symbolic | |
3323 | shared libraries. */ | |
0e1862bb | 3324 | if (bfd_link_executable (info) || SYMBOLIC_BIND (info, h)) |
0a1b45a2 | 3325 | return true; |
f6c52c13 AM |
3326 | |
3327 | /* Now deal with defined dynamic symbols in shared libraries. Ones | |
3328 | with default visibility might not resolve locally. */ | |
3329 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
0a1b45a2 | 3330 | return false; |
f6c52c13 | 3331 | |
fcb93ecf PB |
3332 | hash_table = elf_hash_table (info); |
3333 | if (!is_elf_hash_table (hash_table)) | |
0a1b45a2 | 3334 | return true; |
fcb93ecf PB |
3335 | |
3336 | bed = get_elf_backend_data (hash_table->dynobj); | |
3337 | ||
f7483970 L |
3338 | /* If extern_protected_data is false, STV_PROTECTED non-function |
3339 | symbols are local. */ | |
889c2a67 L |
3340 | if ((!info->extern_protected_data |
3341 | || (info->extern_protected_data < 0 | |
3342 | && !bed->extern_protected_data)) | |
3343 | && !bed->is_function_type (h->type)) | |
0a1b45a2 | 3344 | return true; |
1c16dfa5 | 3345 | |
f6c52c13 | 3346 | /* Function pointer equality tests may require that STV_PROTECTED |
2676a7d9 AM |
3347 | symbols be treated as dynamic symbols. If the address of a |
3348 | function not defined in an executable is set to that function's | |
3349 | plt entry in the executable, then the address of the function in | |
3350 | a shared library must also be the plt entry in the executable. */ | |
f6c52c13 AM |
3351 | return local_protected; |
3352 | } | |
e1918d23 AM |
3353 | |
3354 | /* Caches some TLS segment info, and ensures that the TLS segment vma is | |
3355 | aligned. Returns the first TLS output section. */ | |
3356 | ||
3357 | struct bfd_section * | |
3358 | _bfd_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) | |
3359 | { | |
3360 | struct bfd_section *sec, *tls; | |
3361 | unsigned int align = 0; | |
3362 | ||
3363 | for (sec = obfd->sections; sec != NULL; sec = sec->next) | |
3364 | if ((sec->flags & SEC_THREAD_LOCAL) != 0) | |
3365 | break; | |
3366 | tls = sec; | |
3367 | ||
3368 | for (; sec != NULL && (sec->flags & SEC_THREAD_LOCAL) != 0; sec = sec->next) | |
3369 | if (sec->alignment_power > align) | |
3370 | align = sec->alignment_power; | |
3371 | ||
3372 | elf_hash_table (info)->tls_sec = tls; | |
3373 | ||
fdde2fb6 SH |
3374 | /* Ensure the alignment of the first section (usually .tdata) is the largest |
3375 | alignment, so that the tls segment starts aligned. */ | |
e1918d23 AM |
3376 | if (tls != NULL) |
3377 | tls->alignment_power = align; | |
3378 | ||
3379 | return tls; | |
3380 | } | |
0ad989f9 L |
3381 | |
3382 | /* Return TRUE iff this is a non-common, definition of a non-function symbol. */ | |
0a1b45a2 | 3383 | static bool |
0ad989f9 L |
3384 | is_global_data_symbol_definition (bfd *abfd ATTRIBUTE_UNUSED, |
3385 | Elf_Internal_Sym *sym) | |
3386 | { | |
a4d8e49b L |
3387 | const struct elf_backend_data *bed; |
3388 | ||
0ad989f9 L |
3389 | /* Local symbols do not count, but target specific ones might. */ |
3390 | if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL | |
3391 | && ELF_ST_BIND (sym->st_info) < STB_LOOS) | |
0a1b45a2 | 3392 | return false; |
0ad989f9 | 3393 | |
fcb93ecf | 3394 | bed = get_elf_backend_data (abfd); |
0ad989f9 | 3395 | /* Function symbols do not count. */ |
fcb93ecf | 3396 | if (bed->is_function_type (ELF_ST_TYPE (sym->st_info))) |
0a1b45a2 | 3397 | return false; |
0ad989f9 L |
3398 | |
3399 | /* If the section is undefined, then so is the symbol. */ | |
3400 | if (sym->st_shndx == SHN_UNDEF) | |
0a1b45a2 | 3401 | return false; |
0ad989f9 L |
3402 | |
3403 | /* If the symbol is defined in the common section, then | |
3404 | it is a common definition and so does not count. */ | |
a4d8e49b | 3405 | if (bed->common_definition (sym)) |
0a1b45a2 | 3406 | return false; |
0ad989f9 L |
3407 | |
3408 | /* If the symbol is in a target specific section then we | |
3409 | must rely upon the backend to tell us what it is. */ | |
3410 | if (sym->st_shndx >= SHN_LORESERVE && sym->st_shndx < SHN_ABS) | |
3411 | /* FIXME - this function is not coded yet: | |
3412 | ||
3413 | return _bfd_is_global_symbol_definition (abfd, sym); | |
3414 | ||
3415 | Instead for now assume that the definition is not global, | |
3416 | Even if this is wrong, at least the linker will behave | |
3417 | in the same way that it used to do. */ | |
0a1b45a2 | 3418 | return false; |
0ad989f9 | 3419 | |
0a1b45a2 | 3420 | return true; |
0ad989f9 L |
3421 | } |
3422 | ||
3423 | /* Search the symbol table of the archive element of the archive ABFD | |
3424 | whose archive map contains a mention of SYMDEF, and determine if | |
3425 | the symbol is defined in this element. */ | |
0a1b45a2 | 3426 | static bool |
0ad989f9 L |
3427 | elf_link_is_defined_archive_symbol (bfd * abfd, carsym * symdef) |
3428 | { | |
3429 | Elf_Internal_Shdr * hdr; | |
ef53be89 AM |
3430 | size_t symcount; |
3431 | size_t extsymcount; | |
3432 | size_t extsymoff; | |
0ad989f9 L |
3433 | Elf_Internal_Sym *isymbuf; |
3434 | Elf_Internal_Sym *isym; | |
3435 | Elf_Internal_Sym *isymend; | |
0a1b45a2 | 3436 | bool result; |
0ad989f9 L |
3437 | |
3438 | abfd = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
3439 | if (abfd == NULL) | |
0a1b45a2 | 3440 | return false; |
0ad989f9 L |
3441 | |
3442 | if (! bfd_check_format (abfd, bfd_object)) | |
0a1b45a2 | 3443 | return false; |
0ad989f9 | 3444 | |
7dc3990e L |
3445 | /* Select the appropriate symbol table. If we don't know if the |
3446 | object file is an IR object, give linker LTO plugin a chance to | |
3447 | get the correct symbol table. */ | |
3448 | if (abfd->plugin_format == bfd_plugin_yes | |
08ce1d72 | 3449 | #if BFD_SUPPORTS_PLUGINS |
7dc3990e L |
3450 | || (abfd->plugin_format == bfd_plugin_unknown |
3451 | && bfd_link_plugin_object_p (abfd)) | |
3452 | #endif | |
3453 | ) | |
3454 | { | |
3455 | /* Use the IR symbol table if the object has been claimed by | |
3456 | plugin. */ | |
3457 | abfd = abfd->plugin_dummy_bfd; | |
3458 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
3459 | } | |
3460 | else if ((abfd->flags & DYNAMIC) == 0 || elf_dynsymtab (abfd) == 0) | |
0ad989f9 L |
3461 | hdr = &elf_tdata (abfd)->symtab_hdr; |
3462 | else | |
3463 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
3464 | ||
3465 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
3466 | ||
3467 | /* The sh_info field of the symtab header tells us where the | |
3468 | external symbols start. We don't care about the local symbols. */ | |
3469 | if (elf_bad_symtab (abfd)) | |
3470 | { | |
3471 | extsymcount = symcount; | |
3472 | extsymoff = 0; | |
3473 | } | |
3474 | else | |
3475 | { | |
3476 | extsymcount = symcount - hdr->sh_info; | |
3477 | extsymoff = hdr->sh_info; | |
3478 | } | |
3479 | ||
3480 | if (extsymcount == 0) | |
0a1b45a2 | 3481 | return false; |
0ad989f9 L |
3482 | |
3483 | /* Read in the symbol table. */ | |
3484 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
3485 | NULL, NULL, NULL); | |
3486 | if (isymbuf == NULL) | |
0a1b45a2 | 3487 | return false; |
0ad989f9 L |
3488 | |
3489 | /* Scan the symbol table looking for SYMDEF. */ | |
0a1b45a2 | 3490 | result = false; |
0ad989f9 L |
3491 | for (isym = isymbuf, isymend = isymbuf + extsymcount; isym < isymend; isym++) |
3492 | { | |
3493 | const char *name; | |
3494 | ||
3495 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
3496 | isym->st_name); | |
3497 | if (name == NULL) | |
3498 | break; | |
3499 | ||
3500 | if (strcmp (name, symdef->name) == 0) | |
3501 | { | |
3502 | result = is_global_data_symbol_definition (abfd, isym); | |
3503 | break; | |
3504 | } | |
3505 | } | |
3506 | ||
3507 | free (isymbuf); | |
3508 | ||
3509 | return result; | |
3510 | } | |
3511 | \f | |
5a580b3a AM |
3512 | /* Add an entry to the .dynamic table. */ |
3513 | ||
0a1b45a2 | 3514 | bool |
5a580b3a AM |
3515 | _bfd_elf_add_dynamic_entry (struct bfd_link_info *info, |
3516 | bfd_vma tag, | |
3517 | bfd_vma val) | |
3518 | { | |
3519 | struct elf_link_hash_table *hash_table; | |
3520 | const struct elf_backend_data *bed; | |
3521 | asection *s; | |
3522 | bfd_size_type newsize; | |
3523 | bfd_byte *newcontents; | |
3524 | Elf_Internal_Dyn dyn; | |
3525 | ||
3526 | hash_table = elf_hash_table (info); | |
3527 | if (! is_elf_hash_table (hash_table)) | |
0a1b45a2 | 3528 | return false; |
5a580b3a | 3529 | |
7f923b7f | 3530 | if (tag == DT_RELA || tag == DT_REL) |
0a1b45a2 | 3531 | hash_table->dynamic_relocs = true; |
7f923b7f | 3532 | |
5a580b3a | 3533 | bed = get_elf_backend_data (hash_table->dynobj); |
3d4d4302 | 3534 | s = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
5a580b3a AM |
3535 | BFD_ASSERT (s != NULL); |
3536 | ||
eea6121a | 3537 | newsize = s->size + bed->s->sizeof_dyn; |
a50b1753 | 3538 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); |
5a580b3a | 3539 | if (newcontents == NULL) |
0a1b45a2 | 3540 | return false; |
5a580b3a AM |
3541 | |
3542 | dyn.d_tag = tag; | |
3543 | dyn.d_un.d_val = val; | |
eea6121a | 3544 | bed->s->swap_dyn_out (hash_table->dynobj, &dyn, newcontents + s->size); |
5a580b3a | 3545 | |
eea6121a | 3546 | s->size = newsize; |
5a580b3a AM |
3547 | s->contents = newcontents; |
3548 | ||
0a1b45a2 | 3549 | return true; |
5a580b3a AM |
3550 | } |
3551 | ||
6f6fd151 L |
3552 | /* Strip zero-sized dynamic sections. */ |
3553 | ||
0a1b45a2 | 3554 | bool |
6f6fd151 L |
3555 | _bfd_elf_strip_zero_sized_dynamic_sections (struct bfd_link_info *info) |
3556 | { | |
3557 | struct elf_link_hash_table *hash_table; | |
3558 | const struct elf_backend_data *bed; | |
3559 | asection *s, *sdynamic, **pp; | |
3560 | asection *rela_dyn, *rel_dyn; | |
3561 | Elf_Internal_Dyn dyn; | |
3562 | bfd_byte *extdyn, *next; | |
3563 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
0a1b45a2 AM |
3564 | bool strip_zero_sized; |
3565 | bool strip_zero_sized_plt; | |
6f6fd151 L |
3566 | |
3567 | if (bfd_link_relocatable (info)) | |
0a1b45a2 | 3568 | return true; |
6f6fd151 L |
3569 | |
3570 | hash_table = elf_hash_table (info); | |
3571 | if (!is_elf_hash_table (hash_table)) | |
0a1b45a2 | 3572 | return false; |
6f6fd151 L |
3573 | |
3574 | if (!hash_table->dynobj) | |
0a1b45a2 | 3575 | return true; |
6f6fd151 L |
3576 | |
3577 | sdynamic= bfd_get_linker_section (hash_table->dynobj, ".dynamic"); | |
3578 | if (!sdynamic) | |
0a1b45a2 | 3579 | return true; |
6f6fd151 L |
3580 | |
3581 | bed = get_elf_backend_data (hash_table->dynobj); | |
3582 | swap_dyn_in = bed->s->swap_dyn_in; | |
3583 | ||
0a1b45a2 AM |
3584 | strip_zero_sized = false; |
3585 | strip_zero_sized_plt = false; | |
6f6fd151 L |
3586 | |
3587 | /* Strip zero-sized dynamic sections. */ | |
3588 | rela_dyn = bfd_get_section_by_name (info->output_bfd, ".rela.dyn"); | |
3589 | rel_dyn = bfd_get_section_by_name (info->output_bfd, ".rel.dyn"); | |
3590 | for (pp = &info->output_bfd->sections; (s = *pp) != NULL;) | |
3591 | if (s->size == 0 | |
3592 | && (s == rela_dyn | |
3593 | || s == rel_dyn | |
3594 | || s == hash_table->srelplt->output_section | |
3595 | || s == hash_table->splt->output_section)) | |
3596 | { | |
3597 | *pp = s->next; | |
3598 | info->output_bfd->section_count--; | |
0a1b45a2 | 3599 | strip_zero_sized = true; |
6f6fd151 L |
3600 | if (s == rela_dyn) |
3601 | s = rela_dyn; | |
3602 | if (s == rel_dyn) | |
3603 | s = rel_dyn; | |
3604 | else if (s == hash_table->splt->output_section) | |
3605 | { | |
3606 | s = hash_table->splt; | |
0a1b45a2 | 3607 | strip_zero_sized_plt = true; |
6f6fd151 L |
3608 | } |
3609 | else | |
3610 | s = hash_table->srelplt; | |
3611 | s->flags |= SEC_EXCLUDE; | |
3612 | s->output_section = bfd_abs_section_ptr; | |
3613 | } | |
3614 | else | |
3615 | pp = &s->next; | |
3616 | ||
3617 | if (strip_zero_sized_plt) | |
3618 | for (extdyn = sdynamic->contents; | |
3619 | extdyn < sdynamic->contents + sdynamic->size; | |
3620 | extdyn = next) | |
3621 | { | |
3622 | next = extdyn + bed->s->sizeof_dyn; | |
3623 | swap_dyn_in (hash_table->dynobj, extdyn, &dyn); | |
3624 | switch (dyn.d_tag) | |
3625 | { | |
3626 | default: | |
3627 | break; | |
3628 | case DT_JMPREL: | |
3629 | case DT_PLTRELSZ: | |
3630 | case DT_PLTREL: | |
3631 | /* Strip DT_PLTRELSZ, DT_JMPREL and DT_PLTREL entries if | |
3632 | the procedure linkage table (the .plt section) has been | |
3633 | removed. */ | |
3634 | memmove (extdyn, next, | |
3635 | sdynamic->size - (next - sdynamic->contents)); | |
3636 | next = extdyn; | |
3637 | } | |
3638 | } | |
3639 | ||
3640 | if (strip_zero_sized) | |
3641 | { | |
3642 | /* Regenerate program headers. */ | |
3643 | elf_seg_map (info->output_bfd) = NULL; | |
3644 | return _bfd_elf_map_sections_to_segments (info->output_bfd, info); | |
3645 | } | |
3646 | ||
0a1b45a2 | 3647 | return true; |
6f6fd151 L |
3648 | } |
3649 | ||
e310298c | 3650 | /* Add a DT_NEEDED entry for this dynamic object. Returns -1 on error, |
5a580b3a AM |
3651 | 1 if a DT_NEEDED tag already exists, and 0 on success. */ |
3652 | ||
e310298c AM |
3653 | int |
3654 | bfd_elf_add_dt_needed_tag (bfd *abfd, struct bfd_link_info *info) | |
5a580b3a AM |
3655 | { |
3656 | struct elf_link_hash_table *hash_table; | |
ef53be89 | 3657 | size_t strindex; |
e310298c | 3658 | const char *soname; |
5a580b3a | 3659 | |
7e9f0867 AM |
3660 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
3661 | return -1; | |
3662 | ||
5a580b3a | 3663 | hash_table = elf_hash_table (info); |
e310298c | 3664 | soname = elf_dt_name (abfd); |
0a1b45a2 | 3665 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, soname, false); |
ef53be89 | 3666 | if (strindex == (size_t) -1) |
5a580b3a AM |
3667 | return -1; |
3668 | ||
02be4619 | 3669 | if (_bfd_elf_strtab_refcount (hash_table->dynstr, strindex) != 1) |
5a580b3a AM |
3670 | { |
3671 | asection *sdyn; | |
3672 | const struct elf_backend_data *bed; | |
3673 | bfd_byte *extdyn; | |
3674 | ||
3675 | bed = get_elf_backend_data (hash_table->dynobj); | |
3d4d4302 | 3676 | sdyn = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
7e9f0867 AM |
3677 | if (sdyn != NULL) |
3678 | for (extdyn = sdyn->contents; | |
3679 | extdyn < sdyn->contents + sdyn->size; | |
3680 | extdyn += bed->s->sizeof_dyn) | |
3681 | { | |
3682 | Elf_Internal_Dyn dyn; | |
5a580b3a | 3683 | |
7e9f0867 AM |
3684 | bed->s->swap_dyn_in (hash_table->dynobj, extdyn, &dyn); |
3685 | if (dyn.d_tag == DT_NEEDED | |
3686 | && dyn.d_un.d_val == strindex) | |
3687 | { | |
3688 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3689 | return 1; | |
3690 | } | |
3691 | } | |
5a580b3a AM |
3692 | } |
3693 | ||
e310298c AM |
3694 | if (!_bfd_elf_link_create_dynamic_sections (hash_table->dynobj, info)) |
3695 | return -1; | |
7e9f0867 | 3696 | |
e310298c AM |
3697 | if (!_bfd_elf_add_dynamic_entry (info, DT_NEEDED, strindex)) |
3698 | return -1; | |
5a580b3a AM |
3699 | |
3700 | return 0; | |
3701 | } | |
3702 | ||
7b15fa7a AM |
3703 | /* Return true if SONAME is on the needed list between NEEDED and STOP |
3704 | (or the end of list if STOP is NULL), and needed by a library that | |
3705 | will be loaded. */ | |
3706 | ||
0a1b45a2 | 3707 | static bool |
7b15fa7a AM |
3708 | on_needed_list (const char *soname, |
3709 | struct bfd_link_needed_list *needed, | |
3710 | struct bfd_link_needed_list *stop) | |
010e5ae2 | 3711 | { |
7b15fa7a AM |
3712 | struct bfd_link_needed_list *look; |
3713 | for (look = needed; look != stop; look = look->next) | |
3714 | if (strcmp (soname, look->name) == 0 | |
3715 | && ((elf_dyn_lib_class (look->by) & DYN_AS_NEEDED) == 0 | |
3716 | /* If needed by a library that itself is not directly | |
3717 | needed, recursively check whether that library is | |
3718 | indirectly needed. Since we add DT_NEEDED entries to | |
3719 | the end of the list, library dependencies appear after | |
3720 | the library. Therefore search prior to the current | |
3721 | LOOK, preventing possible infinite recursion. */ | |
3722 | || on_needed_list (elf_dt_name (look->by), needed, look))) | |
0a1b45a2 | 3723 | return true; |
010e5ae2 | 3724 | |
0a1b45a2 | 3725 | return false; |
010e5ae2 AM |
3726 | } |
3727 | ||
3a3f4bf7 | 3728 | /* Sort symbol by value, section, size, and type. */ |
4ad4eba5 AM |
3729 | static int |
3730 | elf_sort_symbol (const void *arg1, const void *arg2) | |
5a580b3a AM |
3731 | { |
3732 | const struct elf_link_hash_entry *h1; | |
3733 | const struct elf_link_hash_entry *h2; | |
10b7e05b | 3734 | bfd_signed_vma vdiff; |
3a3f4bf7 AM |
3735 | int sdiff; |
3736 | const char *n1; | |
3737 | const char *n2; | |
5a580b3a AM |
3738 | |
3739 | h1 = *(const struct elf_link_hash_entry **) arg1; | |
3740 | h2 = *(const struct elf_link_hash_entry **) arg2; | |
10b7e05b NC |
3741 | vdiff = h1->root.u.def.value - h2->root.u.def.value; |
3742 | if (vdiff != 0) | |
3743 | return vdiff > 0 ? 1 : -1; | |
3a3f4bf7 AM |
3744 | |
3745 | sdiff = h1->root.u.def.section->id - h2->root.u.def.section->id; | |
3746 | if (sdiff != 0) | |
3747 | return sdiff; | |
3748 | ||
3749 | /* Sort so that sized symbols are selected over zero size symbols. */ | |
3750 | vdiff = h1->size - h2->size; | |
3751 | if (vdiff != 0) | |
3752 | return vdiff > 0 ? 1 : -1; | |
3753 | ||
3754 | /* Sort so that STT_OBJECT is selected over STT_NOTYPE. */ | |
3755 | if (h1->type != h2->type) | |
3756 | return h1->type - h2->type; | |
3757 | ||
3758 | /* If symbols are properly sized and typed, and multiple strong | |
3759 | aliases are not defined in a shared library by the user we | |
3760 | shouldn't get here. Unfortunately linker script symbols like | |
3761 | __bss_start sometimes match a user symbol defined at the start of | |
3762 | .bss without proper size and type. We'd like to preference the | |
3763 | user symbol over reserved system symbols. Sort on leading | |
3764 | underscores. */ | |
3765 | n1 = h1->root.root.string; | |
3766 | n2 = h2->root.root.string; | |
3767 | while (*n1 == *n2) | |
10b7e05b | 3768 | { |
3a3f4bf7 AM |
3769 | if (*n1 == 0) |
3770 | break; | |
3771 | ++n1; | |
3772 | ++n2; | |
10b7e05b | 3773 | } |
3a3f4bf7 AM |
3774 | if (*n1 == '_') |
3775 | return -1; | |
3776 | if (*n2 == '_') | |
3777 | return 1; | |
3778 | ||
3779 | /* Final sort on name selects user symbols like '_u' over reserved | |
3780 | system symbols like '_Z' and also will avoid qsort instability. */ | |
3781 | return *n1 - *n2; | |
5a580b3a | 3782 | } |
4ad4eba5 | 3783 | |
5a580b3a AM |
3784 | /* This function is used to adjust offsets into .dynstr for |
3785 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
3786 | ||
0a1b45a2 | 3787 | static bool |
5a580b3a AM |
3788 | elf_adjust_dynstr_offsets (struct elf_link_hash_entry *h, void *data) |
3789 | { | |
a50b1753 | 3790 | struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data; |
5a580b3a | 3791 | |
5a580b3a AM |
3792 | if (h->dynindx != -1) |
3793 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
0a1b45a2 | 3794 | return true; |
5a580b3a AM |
3795 | } |
3796 | ||
3797 | /* Assign string offsets in .dynstr, update all structures referencing | |
3798 | them. */ | |
3799 | ||
0a1b45a2 | 3800 | static bool |
4ad4eba5 | 3801 | elf_finalize_dynstr (bfd *output_bfd, struct bfd_link_info *info) |
5a580b3a AM |
3802 | { |
3803 | struct elf_link_hash_table *hash_table = elf_hash_table (info); | |
3804 | struct elf_link_local_dynamic_entry *entry; | |
3805 | struct elf_strtab_hash *dynstr = hash_table->dynstr; | |
3806 | bfd *dynobj = hash_table->dynobj; | |
3807 | asection *sdyn; | |
3808 | bfd_size_type size; | |
3809 | const struct elf_backend_data *bed; | |
3810 | bfd_byte *extdyn; | |
3811 | ||
3812 | _bfd_elf_strtab_finalize (dynstr); | |
3813 | size = _bfd_elf_strtab_size (dynstr); | |
3814 | ||
3d16b64e NA |
3815 | /* Allow the linker to examine the dynsymtab now it's fully populated. */ |
3816 | ||
3817 | if (info->callbacks->examine_strtab) | |
3818 | info->callbacks->examine_strtab (dynstr); | |
3819 | ||
5a580b3a | 3820 | bed = get_elf_backend_data (dynobj); |
3d4d4302 | 3821 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
5a580b3a AM |
3822 | BFD_ASSERT (sdyn != NULL); |
3823 | ||
3824 | /* Update all .dynamic entries referencing .dynstr strings. */ | |
3825 | for (extdyn = sdyn->contents; | |
eea6121a | 3826 | extdyn < sdyn->contents + sdyn->size; |
5a580b3a AM |
3827 | extdyn += bed->s->sizeof_dyn) |
3828 | { | |
3829 | Elf_Internal_Dyn dyn; | |
3830 | ||
3831 | bed->s->swap_dyn_in (dynobj, extdyn, &dyn); | |
3832 | switch (dyn.d_tag) | |
3833 | { | |
3834 | case DT_STRSZ: | |
3835 | dyn.d_un.d_val = size; | |
3836 | break; | |
3837 | case DT_NEEDED: | |
3838 | case DT_SONAME: | |
3839 | case DT_RPATH: | |
3840 | case DT_RUNPATH: | |
3841 | case DT_FILTER: | |
3842 | case DT_AUXILIARY: | |
7ee314fa AM |
3843 | case DT_AUDIT: |
3844 | case DT_DEPAUDIT: | |
5a580b3a AM |
3845 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); |
3846 | break; | |
3847 | default: | |
3848 | continue; | |
3849 | } | |
3850 | bed->s->swap_dyn_out (dynobj, &dyn, extdyn); | |
3851 | } | |
3852 | ||
3853 | /* Now update local dynamic symbols. */ | |
3854 | for (entry = hash_table->dynlocal; entry ; entry = entry->next) | |
3855 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
3856 | entry->isym.st_name); | |
3857 | ||
3858 | /* And the rest of dynamic symbols. */ | |
3859 | elf_link_hash_traverse (hash_table, elf_adjust_dynstr_offsets, dynstr); | |
3860 | ||
3861 | /* Adjust version definitions. */ | |
3862 | if (elf_tdata (output_bfd)->cverdefs) | |
3863 | { | |
3864 | asection *s; | |
3865 | bfd_byte *p; | |
ef53be89 | 3866 | size_t i; |
5a580b3a AM |
3867 | Elf_Internal_Verdef def; |
3868 | Elf_Internal_Verdaux defaux; | |
3869 | ||
3d4d4302 | 3870 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); |
5a580b3a AM |
3871 | p = s->contents; |
3872 | do | |
3873 | { | |
3874 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, | |
3875 | &def); | |
3876 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
3877 | if (def.vd_aux != sizeof (Elf_External_Verdef)) |
3878 | continue; | |
5a580b3a AM |
3879 | for (i = 0; i < def.vd_cnt; ++i) |
3880 | { | |
3881 | _bfd_elf_swap_verdaux_in (output_bfd, | |
3882 | (Elf_External_Verdaux *) p, &defaux); | |
3883 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
3884 | defaux.vda_name); | |
3885 | _bfd_elf_swap_verdaux_out (output_bfd, | |
3886 | &defaux, (Elf_External_Verdaux *) p); | |
3887 | p += sizeof (Elf_External_Verdaux); | |
3888 | } | |
3889 | } | |
3890 | while (def.vd_next); | |
3891 | } | |
3892 | ||
3893 | /* Adjust version references. */ | |
3894 | if (elf_tdata (output_bfd)->verref) | |
3895 | { | |
3896 | asection *s; | |
3897 | bfd_byte *p; | |
ef53be89 | 3898 | size_t i; |
5a580b3a AM |
3899 | Elf_Internal_Verneed need; |
3900 | Elf_Internal_Vernaux needaux; | |
3901 | ||
3d4d4302 | 3902 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); |
5a580b3a AM |
3903 | p = s->contents; |
3904 | do | |
3905 | { | |
3906 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, | |
3907 | &need); | |
3908 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
3909 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
3910 | (Elf_External_Verneed *) p); | |
3911 | p += sizeof (Elf_External_Verneed); | |
3912 | for (i = 0; i < need.vn_cnt; ++i) | |
3913 | { | |
3914 | _bfd_elf_swap_vernaux_in (output_bfd, | |
3915 | (Elf_External_Vernaux *) p, &needaux); | |
3916 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
3917 | needaux.vna_name); | |
3918 | _bfd_elf_swap_vernaux_out (output_bfd, | |
3919 | &needaux, | |
3920 | (Elf_External_Vernaux *) p); | |
3921 | p += sizeof (Elf_External_Vernaux); | |
3922 | } | |
3923 | } | |
3924 | while (need.vn_next); | |
3925 | } | |
3926 | ||
0a1b45a2 | 3927 | return true; |
5a580b3a AM |
3928 | } |
3929 | \f | |
13285a1b AM |
3930 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. |
3931 | The default is to only match when the INPUT and OUTPUT are exactly | |
3932 | the same target. */ | |
3933 | ||
0a1b45a2 | 3934 | bool |
13285a1b AM |
3935 | _bfd_elf_default_relocs_compatible (const bfd_target *input, |
3936 | const bfd_target *output) | |
3937 | { | |
3938 | return input == output; | |
3939 | } | |
3940 | ||
3941 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. | |
3942 | This version is used when different targets for the same architecture | |
3943 | are virtually identical. */ | |
3944 | ||
0a1b45a2 | 3945 | bool |
13285a1b AM |
3946 | _bfd_elf_relocs_compatible (const bfd_target *input, |
3947 | const bfd_target *output) | |
3948 | { | |
3949 | const struct elf_backend_data *obed, *ibed; | |
3950 | ||
3951 | if (input == output) | |
0a1b45a2 | 3952 | return true; |
13285a1b AM |
3953 | |
3954 | ibed = xvec_get_elf_backend_data (input); | |
3955 | obed = xvec_get_elf_backend_data (output); | |
3956 | ||
3957 | if (ibed->arch != obed->arch) | |
0a1b45a2 | 3958 | return false; |
13285a1b AM |
3959 | |
3960 | /* If both backends are using this function, deem them compatible. */ | |
3961 | return ibed->relocs_compatible == obed->relocs_compatible; | |
3962 | } | |
3963 | ||
e5034e59 AM |
3964 | /* Make a special call to the linker "notice" function to tell it that |
3965 | we are about to handle an as-needed lib, or have finished | |
1b786873 | 3966 | processing the lib. */ |
e5034e59 | 3967 | |
0a1b45a2 | 3968 | bool |
e5034e59 AM |
3969 | _bfd_elf_notice_as_needed (bfd *ibfd, |
3970 | struct bfd_link_info *info, | |
3971 | enum notice_asneeded_action act) | |
3972 | { | |
46135103 | 3973 | return (*info->callbacks->notice) (info, NULL, NULL, ibfd, NULL, act, 0); |
e5034e59 AM |
3974 | } |
3975 | ||
d9689752 L |
3976 | /* Check relocations an ELF object file. */ |
3977 | ||
0a1b45a2 | 3978 | bool |
d9689752 L |
3979 | _bfd_elf_link_check_relocs (bfd *abfd, struct bfd_link_info *info) |
3980 | { | |
3981 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3982 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
3983 | ||
3984 | /* If this object is the same format as the output object, and it is | |
3985 | not a shared library, then let the backend look through the | |
3986 | relocs. | |
3987 | ||
3988 | This is required to build global offset table entries and to | |
3989 | arrange for dynamic relocs. It is not required for the | |
3990 | particular common case of linking non PIC code, even when linking | |
3991 | against shared libraries, but unfortunately there is no way of | |
3992 | knowing whether an object file has been compiled PIC or not. | |
3993 | Looking through the relocs is not particularly time consuming. | |
3994 | The problem is that we must either (1) keep the relocs in memory, | |
3995 | which causes the linker to require additional runtime memory or | |
3996 | (2) read the relocs twice from the input file, which wastes time. | |
3997 | This would be a good case for using mmap. | |
3998 | ||
3999 | I have no idea how to handle linking PIC code into a file of a | |
4000 | different format. It probably can't be done. */ | |
4001 | if ((abfd->flags & DYNAMIC) == 0 | |
4002 | && is_elf_hash_table (htab) | |
4003 | && bed->check_relocs != NULL | |
4004 | && elf_object_id (abfd) == elf_hash_table_id (htab) | |
4005 | && (*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) | |
4006 | { | |
4007 | asection *o; | |
4008 | ||
4009 | for (o = abfd->sections; o != NULL; o = o->next) | |
4010 | { | |
4011 | Elf_Internal_Rela *internal_relocs; | |
0a1b45a2 | 4012 | bool ok; |
d9689752 | 4013 | |
c4b126b8 L |
4014 | /* Don't check relocations in excluded sections. Don't do |
4015 | anything special with non-loaded, non-alloced sections. | |
4016 | In particular, any relocs in such sections should not | |
4017 | affect GOT and PLT reference counting (ie. we don't | |
4018 | allow them to create GOT or PLT entries), there's no | |
4019 | possibility or desire to optimize TLS relocs, and | |
4020 | there's not much point in propagating relocs to shared | |
4021 | libs that the dynamic linker won't relocate. */ | |
4022 | if ((o->flags & SEC_ALLOC) == 0 | |
4023 | || (o->flags & SEC_RELOC) == 0 | |
5ce03cea | 4024 | || (o->flags & SEC_EXCLUDE) != 0 |
d9689752 L |
4025 | || o->reloc_count == 0 |
4026 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
4027 | && (o->flags & SEC_DEBUGGING) != 0) | |
4028 | || bfd_is_abs_section (o->output_section)) | |
4029 | continue; | |
4030 | ||
4031 | internal_relocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, | |
4032 | info->keep_memory); | |
4033 | if (internal_relocs == NULL) | |
0a1b45a2 | 4034 | return false; |
d9689752 L |
4035 | |
4036 | ok = (*bed->check_relocs) (abfd, info, o, internal_relocs); | |
4037 | ||
4038 | if (elf_section_data (o)->relocs != internal_relocs) | |
4039 | free (internal_relocs); | |
4040 | ||
4041 | if (! ok) | |
0a1b45a2 | 4042 | return false; |
d9689752 L |
4043 | } |
4044 | } | |
4045 | ||
0a1b45a2 | 4046 | return true; |
d9689752 L |
4047 | } |
4048 | ||
4ad4eba5 AM |
4049 | /* Add symbols from an ELF object file to the linker hash table. */ |
4050 | ||
0a1b45a2 | 4051 | static bool |
4ad4eba5 AM |
4052 | elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) |
4053 | { | |
a0c402a5 | 4054 | Elf_Internal_Ehdr *ehdr; |
4ad4eba5 | 4055 | Elf_Internal_Shdr *hdr; |
ef53be89 AM |
4056 | size_t symcount; |
4057 | size_t extsymcount; | |
4058 | size_t extsymoff; | |
4ad4eba5 | 4059 | struct elf_link_hash_entry **sym_hash; |
0a1b45a2 | 4060 | bool dynamic; |
4ad4eba5 | 4061 | Elf_External_Versym *extversym = NULL; |
be22c732 | 4062 | Elf_External_Versym *extversym_end = NULL; |
4ad4eba5 AM |
4063 | Elf_External_Versym *ever; |
4064 | struct elf_link_hash_entry *weaks; | |
4065 | struct elf_link_hash_entry **nondeflt_vers = NULL; | |
ef53be89 | 4066 | size_t nondeflt_vers_cnt = 0; |
4ad4eba5 AM |
4067 | Elf_Internal_Sym *isymbuf = NULL; |
4068 | Elf_Internal_Sym *isym; | |
4069 | Elf_Internal_Sym *isymend; | |
4070 | const struct elf_backend_data *bed; | |
0a1b45a2 | 4071 | bool add_needed; |
66eb6687 | 4072 | struct elf_link_hash_table *htab; |
66eb6687 | 4073 | void *alloc_mark = NULL; |
4f87808c AM |
4074 | struct bfd_hash_entry **old_table = NULL; |
4075 | unsigned int old_size = 0; | |
4076 | unsigned int old_count = 0; | |
66eb6687 | 4077 | void *old_tab = NULL; |
66eb6687 AM |
4078 | void *old_ent; |
4079 | struct bfd_link_hash_entry *old_undefs = NULL; | |
4080 | struct bfd_link_hash_entry *old_undefs_tail = NULL; | |
5b677558 | 4081 | void *old_strtab = NULL; |
66eb6687 | 4082 | size_t tabsize = 0; |
db6a5d5f | 4083 | asection *s; |
0a1b45a2 | 4084 | bool just_syms; |
4ad4eba5 | 4085 | |
66eb6687 | 4086 | htab = elf_hash_table (info); |
4ad4eba5 | 4087 | bed = get_elf_backend_data (abfd); |
4ad4eba5 AM |
4088 | |
4089 | if ((abfd->flags & DYNAMIC) == 0) | |
0a1b45a2 | 4090 | dynamic = false; |
4ad4eba5 AM |
4091 | else |
4092 | { | |
0a1b45a2 | 4093 | dynamic = true; |
4ad4eba5 AM |
4094 | |
4095 | /* You can't use -r against a dynamic object. Also, there's no | |
4096 | hope of using a dynamic object which does not exactly match | |
4097 | the format of the output file. */ | |
0e1862bb | 4098 | if (bfd_link_relocatable (info) |
66eb6687 | 4099 | || !is_elf_hash_table (htab) |
f13a99db | 4100 | || info->output_bfd->xvec != abfd->xvec) |
4ad4eba5 | 4101 | { |
0e1862bb | 4102 | if (bfd_link_relocatable (info)) |
9a0789ec NC |
4103 | bfd_set_error (bfd_error_invalid_operation); |
4104 | else | |
4105 | bfd_set_error (bfd_error_wrong_format); | |
4ad4eba5 AM |
4106 | goto error_return; |
4107 | } | |
4108 | } | |
4109 | ||
a0c402a5 L |
4110 | ehdr = elf_elfheader (abfd); |
4111 | if (info->warn_alternate_em | |
4112 | && bed->elf_machine_code != ehdr->e_machine | |
4113 | && ((bed->elf_machine_alt1 != 0 | |
4114 | && ehdr->e_machine == bed->elf_machine_alt1) | |
4115 | || (bed->elf_machine_alt2 != 0 | |
4116 | && ehdr->e_machine == bed->elf_machine_alt2))) | |
9793eb77 | 4117 | _bfd_error_handler |
695344c0 | 4118 | /* xgettext:c-format */ |
9793eb77 | 4119 | (_("alternate ELF machine code found (%d) in %pB, expecting %d"), |
a0c402a5 L |
4120 | ehdr->e_machine, abfd, bed->elf_machine_code); |
4121 | ||
4ad4eba5 AM |
4122 | /* As a GNU extension, any input sections which are named |
4123 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
4124 | symbol. This differs from .gnu.warning sections, which generate | |
4125 | warnings when they are included in an output file. */ | |
dd98f8d2 | 4126 | /* PR 12761: Also generate this warning when building shared libraries. */ |
db6a5d5f | 4127 | for (s = abfd->sections; s != NULL; s = s->next) |
4ad4eba5 | 4128 | { |
db6a5d5f | 4129 | const char *name; |
4ad4eba5 | 4130 | |
fd361982 | 4131 | name = bfd_section_name (s); |
08dedd66 | 4132 | if (startswith (name, ".gnu.warning.")) |
4ad4eba5 | 4133 | { |
db6a5d5f AM |
4134 | char *msg; |
4135 | bfd_size_type sz; | |
4136 | ||
4137 | name += sizeof ".gnu.warning." - 1; | |
4138 | ||
4139 | /* If this is a shared object, then look up the symbol | |
4140 | in the hash table. If it is there, and it is already | |
4141 | been defined, then we will not be using the entry | |
4142 | from this shared object, so we don't need to warn. | |
4143 | FIXME: If we see the definition in a regular object | |
4144 | later on, we will warn, but we shouldn't. The only | |
4145 | fix is to keep track of what warnings we are supposed | |
4146 | to emit, and then handle them all at the end of the | |
4147 | link. */ | |
4148 | if (dynamic) | |
4ad4eba5 | 4149 | { |
db6a5d5f AM |
4150 | struct elf_link_hash_entry *h; |
4151 | ||
0a1b45a2 | 4152 | h = elf_link_hash_lookup (htab, name, false, false, true); |
db6a5d5f AM |
4153 | |
4154 | /* FIXME: What about bfd_link_hash_common? */ | |
4155 | if (h != NULL | |
4156 | && (h->root.type == bfd_link_hash_defined | |
4157 | || h->root.type == bfd_link_hash_defweak)) | |
4158 | continue; | |
4159 | } | |
4ad4eba5 | 4160 | |
db6a5d5f AM |
4161 | sz = s->size; |
4162 | msg = (char *) bfd_alloc (abfd, sz + 1); | |
4163 | if (msg == NULL) | |
4164 | goto error_return; | |
4ad4eba5 | 4165 | |
db6a5d5f AM |
4166 | if (! bfd_get_section_contents (abfd, s, msg, 0, sz)) |
4167 | goto error_return; | |
4ad4eba5 | 4168 | |
db6a5d5f | 4169 | msg[sz] = '\0'; |
4ad4eba5 | 4170 | |
db6a5d5f AM |
4171 | if (! (_bfd_generic_link_add_one_symbol |
4172 | (info, abfd, name, BSF_WARNING, s, 0, msg, | |
0a1b45a2 | 4173 | false, bed->collect, NULL))) |
db6a5d5f | 4174 | goto error_return; |
4ad4eba5 | 4175 | |
0e1862bb | 4176 | if (bfd_link_executable (info)) |
db6a5d5f AM |
4177 | { |
4178 | /* Clobber the section size so that the warning does | |
4179 | not get copied into the output file. */ | |
4180 | s->size = 0; | |
11d2f718 | 4181 | |
db6a5d5f AM |
4182 | /* Also set SEC_EXCLUDE, so that symbols defined in |
4183 | the warning section don't get copied to the output. */ | |
4184 | s->flags |= SEC_EXCLUDE; | |
4ad4eba5 AM |
4185 | } |
4186 | } | |
4187 | } | |
4188 | ||
29a9f53e L |
4189 | just_syms = ((s = abfd->sections) != NULL |
4190 | && s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS); | |
4191 | ||
0a1b45a2 | 4192 | add_needed = true; |
4ad4eba5 AM |
4193 | if (! dynamic) |
4194 | { | |
4195 | /* If we are creating a shared library, create all the dynamic | |
4196 | sections immediately. We need to attach them to something, | |
4197 | so we attach them to this BFD, provided it is the right | |
bf89386a L |
4198 | format and is not from ld --just-symbols. Always create the |
4199 | dynamic sections for -E/--dynamic-list. FIXME: If there | |
29a9f53e L |
4200 | are no input BFD's of the same format as the output, we can't |
4201 | make a shared library. */ | |
4202 | if (!just_syms | |
bf89386a | 4203 | && (bfd_link_pic (info) |
9c1d7a08 | 4204 | || (!bfd_link_relocatable (info) |
3c5fce9b | 4205 | && info->nointerp |
9c1d7a08 | 4206 | && (info->export_dynamic || info->dynamic))) |
66eb6687 | 4207 | && is_elf_hash_table (htab) |
f13a99db | 4208 | && info->output_bfd->xvec == abfd->xvec |
66eb6687 | 4209 | && !htab->dynamic_sections_created) |
4ad4eba5 AM |
4210 | { |
4211 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
4212 | goto error_return; | |
4213 | } | |
4214 | } | |
66eb6687 | 4215 | else if (!is_elf_hash_table (htab)) |
4ad4eba5 AM |
4216 | goto error_return; |
4217 | else | |
4218 | { | |
4ad4eba5 | 4219 | const char *soname = NULL; |
7ee314fa | 4220 | char *audit = NULL; |
4ad4eba5 | 4221 | struct bfd_link_needed_list *rpath = NULL, *runpath = NULL; |
9acc85a6 | 4222 | const Elf_Internal_Phdr *phdr; |
e310298c | 4223 | struct elf_link_loaded_list *loaded_lib; |
4ad4eba5 AM |
4224 | |
4225 | /* ld --just-symbols and dynamic objects don't mix very well. | |
92fd189d | 4226 | ld shouldn't allow it. */ |
29a9f53e | 4227 | if (just_syms) |
92fd189d | 4228 | abort (); |
4ad4eba5 AM |
4229 | |
4230 | /* If this dynamic lib was specified on the command line with | |
4231 | --as-needed in effect, then we don't want to add a DT_NEEDED | |
4232 | tag unless the lib is actually used. Similary for libs brought | |
e56f61be L |
4233 | in by another lib's DT_NEEDED. When --no-add-needed is used |
4234 | on a dynamic lib, we don't want to add a DT_NEEDED entry for | |
4235 | any dynamic library in DT_NEEDED tags in the dynamic lib at | |
4236 | all. */ | |
4237 | add_needed = (elf_dyn_lib_class (abfd) | |
4238 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | |
4239 | | DYN_NO_NEEDED)) == 0; | |
4ad4eba5 AM |
4240 | |
4241 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
4242 | if (s != NULL) | |
4243 | { | |
4244 | bfd_byte *dynbuf; | |
4245 | bfd_byte *extdyn; | |
cb33740c | 4246 | unsigned int elfsec; |
4ad4eba5 AM |
4247 | unsigned long shlink; |
4248 | ||
eea6121a | 4249 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) |
f8703194 | 4250 | { |
dc1e8a47 | 4251 | error_free_dyn: |
f8703194 L |
4252 | free (dynbuf); |
4253 | goto error_return; | |
4254 | } | |
4ad4eba5 AM |
4255 | |
4256 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 4257 | if (elfsec == SHN_BAD) |
4ad4eba5 AM |
4258 | goto error_free_dyn; |
4259 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
4260 | ||
4261 | for (extdyn = dynbuf; | |
9bff840e | 4262 | extdyn <= dynbuf + s->size - bed->s->sizeof_dyn; |
4ad4eba5 AM |
4263 | extdyn += bed->s->sizeof_dyn) |
4264 | { | |
4265 | Elf_Internal_Dyn dyn; | |
4266 | ||
4267 | bed->s->swap_dyn_in (abfd, extdyn, &dyn); | |
4268 | if (dyn.d_tag == DT_SONAME) | |
4269 | { | |
4270 | unsigned int tagv = dyn.d_un.d_val; | |
4271 | soname = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
4272 | if (soname == NULL) | |
4273 | goto error_free_dyn; | |
4274 | } | |
4275 | if (dyn.d_tag == DT_NEEDED) | |
4276 | { | |
4277 | struct bfd_link_needed_list *n, **pn; | |
4278 | char *fnm, *anm; | |
4279 | unsigned int tagv = dyn.d_un.d_val; | |
986f0783 | 4280 | size_t amt = sizeof (struct bfd_link_needed_list); |
4ad4eba5 | 4281 | |
a50b1753 | 4282 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4283 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
4284 | if (n == NULL || fnm == NULL) | |
4285 | goto error_free_dyn; | |
4286 | amt = strlen (fnm) + 1; | |
a50b1753 | 4287 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4288 | if (anm == NULL) |
4289 | goto error_free_dyn; | |
4290 | memcpy (anm, fnm, amt); | |
4291 | n->name = anm; | |
4292 | n->by = abfd; | |
4293 | n->next = NULL; | |
66eb6687 | 4294 | for (pn = &htab->needed; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
4295 | ; |
4296 | *pn = n; | |
4297 | } | |
4298 | if (dyn.d_tag == DT_RUNPATH) | |
4299 | { | |
4300 | struct bfd_link_needed_list *n, **pn; | |
4301 | char *fnm, *anm; | |
4302 | unsigned int tagv = dyn.d_un.d_val; | |
986f0783 | 4303 | size_t amt = sizeof (struct bfd_link_needed_list); |
4ad4eba5 | 4304 | |
a50b1753 | 4305 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4306 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
4307 | if (n == NULL || fnm == NULL) | |
4308 | goto error_free_dyn; | |
4309 | amt = strlen (fnm) + 1; | |
a50b1753 | 4310 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4311 | if (anm == NULL) |
4312 | goto error_free_dyn; | |
4313 | memcpy (anm, fnm, amt); | |
4314 | n->name = anm; | |
4315 | n->by = abfd; | |
4316 | n->next = NULL; | |
4317 | for (pn = & runpath; | |
4318 | *pn != NULL; | |
4319 | pn = &(*pn)->next) | |
4320 | ; | |
4321 | *pn = n; | |
4322 | } | |
4323 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ | |
4324 | if (!runpath && dyn.d_tag == DT_RPATH) | |
4325 | { | |
4326 | struct bfd_link_needed_list *n, **pn; | |
4327 | char *fnm, *anm; | |
4328 | unsigned int tagv = dyn.d_un.d_val; | |
986f0783 | 4329 | size_t amt = sizeof (struct bfd_link_needed_list); |
4ad4eba5 | 4330 | |
a50b1753 | 4331 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
4332 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
4333 | if (n == NULL || fnm == NULL) | |
4334 | goto error_free_dyn; | |
4335 | amt = strlen (fnm) + 1; | |
a50b1753 | 4336 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 | 4337 | if (anm == NULL) |
f8703194 | 4338 | goto error_free_dyn; |
4ad4eba5 AM |
4339 | memcpy (anm, fnm, amt); |
4340 | n->name = anm; | |
4341 | n->by = abfd; | |
4342 | n->next = NULL; | |
4343 | for (pn = & rpath; | |
4344 | *pn != NULL; | |
4345 | pn = &(*pn)->next) | |
4346 | ; | |
4347 | *pn = n; | |
4348 | } | |
7ee314fa AM |
4349 | if (dyn.d_tag == DT_AUDIT) |
4350 | { | |
4351 | unsigned int tagv = dyn.d_un.d_val; | |
4352 | audit = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
4353 | } | |
4ad4eba5 AM |
4354 | } |
4355 | ||
4356 | free (dynbuf); | |
4357 | } | |
4358 | ||
4359 | /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that | |
4360 | frees all more recently bfd_alloc'd blocks as well. */ | |
4361 | if (runpath) | |
4362 | rpath = runpath; | |
4363 | ||
4364 | if (rpath) | |
4365 | { | |
4366 | struct bfd_link_needed_list **pn; | |
66eb6687 | 4367 | for (pn = &htab->runpath; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
4368 | ; |
4369 | *pn = rpath; | |
4370 | } | |
4371 | ||
9acc85a6 AM |
4372 | /* If we have a PT_GNU_RELRO program header, mark as read-only |
4373 | all sections contained fully therein. This makes relro | |
4374 | shared library sections appear as they will at run-time. */ | |
4375 | phdr = elf_tdata (abfd)->phdr + elf_elfheader (abfd)->e_phnum; | |
54025d58 | 4376 | while (phdr-- > elf_tdata (abfd)->phdr) |
9acc85a6 AM |
4377 | if (phdr->p_type == PT_GNU_RELRO) |
4378 | { | |
4379 | for (s = abfd->sections; s != NULL; s = s->next) | |
502794d4 CE |
4380 | { |
4381 | unsigned int opb = bfd_octets_per_byte (abfd, s); | |
4382 | ||
4383 | if ((s->flags & SEC_ALLOC) != 0 | |
4384 | && s->vma * opb >= phdr->p_vaddr | |
4385 | && s->vma * opb + s->size <= phdr->p_vaddr + phdr->p_memsz) | |
4386 | s->flags |= SEC_READONLY; | |
4387 | } | |
9acc85a6 AM |
4388 | break; |
4389 | } | |
4390 | ||
4ad4eba5 AM |
4391 | /* We do not want to include any of the sections in a dynamic |
4392 | object in the output file. We hack by simply clobbering the | |
4393 | list of sections in the BFD. This could be handled more | |
4394 | cleanly by, say, a new section flag; the existing | |
4395 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
4396 | still implies that the section takes up space in the output | |
4397 | file. */ | |
4398 | bfd_section_list_clear (abfd); | |
4399 | ||
4ad4eba5 AM |
4400 | /* Find the name to use in a DT_NEEDED entry that refers to this |
4401 | object. If the object has a DT_SONAME entry, we use it. | |
4402 | Otherwise, if the generic linker stuck something in | |
4403 | elf_dt_name, we use that. Otherwise, we just use the file | |
4404 | name. */ | |
4405 | if (soname == NULL || *soname == '\0') | |
4406 | { | |
4407 | soname = elf_dt_name (abfd); | |
4408 | if (soname == NULL || *soname == '\0') | |
4409 | soname = bfd_get_filename (abfd); | |
4410 | } | |
4411 | ||
4412 | /* Save the SONAME because sometimes the linker emulation code | |
4413 | will need to know it. */ | |
4414 | elf_dt_name (abfd) = soname; | |
4415 | ||
4ad4eba5 AM |
4416 | /* If we have already included this dynamic object in the |
4417 | link, just ignore it. There is no reason to include a | |
4418 | particular dynamic object more than once. */ | |
e310298c AM |
4419 | for (loaded_lib = htab->dyn_loaded; |
4420 | loaded_lib != NULL; | |
4421 | loaded_lib = loaded_lib->next) | |
4422 | { | |
4423 | if (strcmp (elf_dt_name (loaded_lib->abfd), soname) == 0) | |
0a1b45a2 | 4424 | return true; |
e310298c AM |
4425 | } |
4426 | ||
4427 | /* Create dynamic sections for backends that require that be done | |
4428 | before setup_gnu_properties. */ | |
4429 | if (add_needed | |
4430 | && !_bfd_elf_link_create_dynamic_sections (abfd, info)) | |
0a1b45a2 | 4431 | return false; |
7ee314fa AM |
4432 | |
4433 | /* Save the DT_AUDIT entry for the linker emulation code. */ | |
68ffbac6 | 4434 | elf_dt_audit (abfd) = audit; |
4ad4eba5 AM |
4435 | } |
4436 | ||
4437 | /* If this is a dynamic object, we always link against the .dynsym | |
4438 | symbol table, not the .symtab symbol table. The dynamic linker | |
4439 | will only see the .dynsym symbol table, so there is no reason to | |
4440 | look at .symtab for a dynamic object. */ | |
4441 | ||
4442 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
4443 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
4444 | else | |
4445 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
4446 | ||
4447 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
4448 | ||
4449 | /* The sh_info field of the symtab header tells us where the | |
4450 | external symbols start. We don't care about the local symbols at | |
4451 | this point. */ | |
4452 | if (elf_bad_symtab (abfd)) | |
4453 | { | |
4454 | extsymcount = symcount; | |
4455 | extsymoff = 0; | |
4456 | } | |
4457 | else | |
4458 | { | |
4459 | extsymcount = symcount - hdr->sh_info; | |
4460 | extsymoff = hdr->sh_info; | |
4461 | } | |
4462 | ||
f45794cb | 4463 | sym_hash = elf_sym_hashes (abfd); |
012b2306 | 4464 | if (extsymcount != 0) |
4ad4eba5 AM |
4465 | { |
4466 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
4467 | NULL, NULL, NULL); | |
4468 | if (isymbuf == NULL) | |
4469 | goto error_return; | |
4470 | ||
4ad4eba5 | 4471 | if (sym_hash == NULL) |
012b2306 AM |
4472 | { |
4473 | /* We store a pointer to the hash table entry for each | |
4474 | external symbol. */ | |
986f0783 | 4475 | size_t amt = extsymcount * sizeof (struct elf_link_hash_entry *); |
012b2306 AM |
4476 | sym_hash = (struct elf_link_hash_entry **) bfd_zalloc (abfd, amt); |
4477 | if (sym_hash == NULL) | |
4478 | goto error_free_sym; | |
4479 | elf_sym_hashes (abfd) = sym_hash; | |
4480 | } | |
4ad4eba5 AM |
4481 | } |
4482 | ||
4483 | if (dynamic) | |
4484 | { | |
4485 | /* Read in any version definitions. */ | |
fc0e6df6 PB |
4486 | if (!_bfd_elf_slurp_version_tables (abfd, |
4487 | info->default_imported_symver)) | |
4ad4eba5 AM |
4488 | goto error_free_sym; |
4489 | ||
4490 | /* Read in the symbol versions, but don't bother to convert them | |
4491 | to internal format. */ | |
4492 | if (elf_dynversym (abfd) != 0) | |
4493 | { | |
986f0783 AM |
4494 | Elf_Internal_Shdr *versymhdr = &elf_tdata (abfd)->dynversym_hdr; |
4495 | bfd_size_type amt = versymhdr->sh_size; | |
4ad4eba5 | 4496 | |
2bb3687b AM |
4497 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0) |
4498 | goto error_free_sym; | |
4499 | extversym = (Elf_External_Versym *) | |
4500 | _bfd_malloc_and_read (abfd, amt, amt); | |
4ad4eba5 AM |
4501 | if (extversym == NULL) |
4502 | goto error_free_sym; | |
986f0783 | 4503 | extversym_end = extversym + amt / sizeof (*extversym); |
4ad4eba5 AM |
4504 | } |
4505 | } | |
4506 | ||
66eb6687 AM |
4507 | /* If we are loading an as-needed shared lib, save the symbol table |
4508 | state before we start adding symbols. If the lib turns out | |
4509 | to be unneeded, restore the state. */ | |
4510 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
4511 | { | |
4512 | unsigned int i; | |
4513 | size_t entsize; | |
4514 | ||
4515 | for (entsize = 0, i = 0; i < htab->root.table.size; i++) | |
4516 | { | |
4517 | struct bfd_hash_entry *p; | |
2de92251 | 4518 | struct elf_link_hash_entry *h; |
66eb6687 AM |
4519 | |
4520 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
2de92251 AM |
4521 | { |
4522 | h = (struct elf_link_hash_entry *) p; | |
4523 | entsize += htab->root.table.entsize; | |
4524 | if (h->root.type == bfd_link_hash_warning) | |
7ba11550 AM |
4525 | { |
4526 | entsize += htab->root.table.entsize; | |
4527 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4528 | } | |
4529 | if (h->root.type == bfd_link_hash_common) | |
4530 | entsize += sizeof (*h->root.u.c.p); | |
2de92251 | 4531 | } |
66eb6687 AM |
4532 | } |
4533 | ||
4534 | tabsize = htab->root.table.size * sizeof (struct bfd_hash_entry *); | |
f45794cb | 4535 | old_tab = bfd_malloc (tabsize + entsize); |
66eb6687 AM |
4536 | if (old_tab == NULL) |
4537 | goto error_free_vers; | |
4538 | ||
4539 | /* Remember the current objalloc pointer, so that all mem for | |
4540 | symbols added can later be reclaimed. */ | |
4541 | alloc_mark = bfd_hash_allocate (&htab->root.table, 1); | |
4542 | if (alloc_mark == NULL) | |
4543 | goto error_free_vers; | |
4544 | ||
5061a885 AM |
4545 | /* Make a special call to the linker "notice" function to |
4546 | tell it that we are about to handle an as-needed lib. */ | |
e5034e59 | 4547 | if (!(*bed->notice_as_needed) (abfd, info, notice_as_needed)) |
9af2a943 | 4548 | goto error_free_vers; |
5061a885 | 4549 | |
f45794cb AM |
4550 | /* Clone the symbol table. Remember some pointers into the |
4551 | symbol table, and dynamic symbol count. */ | |
4552 | old_ent = (char *) old_tab + tabsize; | |
66eb6687 | 4553 | memcpy (old_tab, htab->root.table.table, tabsize); |
66eb6687 AM |
4554 | old_undefs = htab->root.undefs; |
4555 | old_undefs_tail = htab->root.undefs_tail; | |
4f87808c AM |
4556 | old_table = htab->root.table.table; |
4557 | old_size = htab->root.table.size; | |
4558 | old_count = htab->root.table.count; | |
e310298c AM |
4559 | old_strtab = NULL; |
4560 | if (htab->dynstr != NULL) | |
4561 | { | |
4562 | old_strtab = _bfd_elf_strtab_save (htab->dynstr); | |
4563 | if (old_strtab == NULL) | |
4564 | goto error_free_vers; | |
4565 | } | |
66eb6687 AM |
4566 | |
4567 | for (i = 0; i < htab->root.table.size; i++) | |
4568 | { | |
4569 | struct bfd_hash_entry *p; | |
2de92251 | 4570 | struct elf_link_hash_entry *h; |
66eb6687 AM |
4571 | |
4572 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
4573 | { | |
2de92251 | 4574 | h = (struct elf_link_hash_entry *) p; |
7ba11550 AM |
4575 | memcpy (old_ent, h, htab->root.table.entsize); |
4576 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
4577 | if (h->root.type == bfd_link_hash_warning) |
4578 | { | |
7ba11550 AM |
4579 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
4580 | memcpy (old_ent, h, htab->root.table.entsize); | |
2de92251 AM |
4581 | old_ent = (char *) old_ent + htab->root.table.entsize; |
4582 | } | |
7ba11550 AM |
4583 | if (h->root.type == bfd_link_hash_common) |
4584 | { | |
4585 | memcpy (old_ent, h->root.u.c.p, sizeof (*h->root.u.c.p)); | |
4586 | old_ent = (char *) old_ent + sizeof (*h->root.u.c.p); | |
4587 | } | |
66eb6687 AM |
4588 | } |
4589 | } | |
4590 | } | |
4ad4eba5 | 4591 | |
66eb6687 | 4592 | weaks = NULL; |
be22c732 NC |
4593 | if (extversym == NULL) |
4594 | ever = NULL; | |
4595 | else if (extversym + extsymoff < extversym_end) | |
4596 | ever = extversym + extsymoff; | |
4597 | else | |
4598 | { | |
4599 | /* xgettext:c-format */ | |
4600 | _bfd_error_handler (_("%pB: invalid version offset %lx (max %lx)"), | |
4601 | abfd, (long) extsymoff, | |
4602 | (long) (extversym_end - extversym) / sizeof (* extversym)); | |
4603 | bfd_set_error (bfd_error_bad_value); | |
4604 | goto error_free_vers; | |
4605 | } | |
4606 | ||
b4c555cf ML |
4607 | if (!bfd_link_relocatable (info) |
4608 | && abfd->lto_slim_object) | |
cc5277b1 ML |
4609 | { |
4610 | _bfd_error_handler | |
4611 | (_("%pB: plugin needed to handle lto object"), abfd); | |
4612 | } | |
4613 | ||
4ad4eba5 AM |
4614 | for (isym = isymbuf, isymend = isymbuf + extsymcount; |
4615 | isym < isymend; | |
4616 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
4617 | { | |
4618 | int bind; | |
4619 | bfd_vma value; | |
af44c138 | 4620 | asection *sec, *new_sec; |
4ad4eba5 AM |
4621 | flagword flags; |
4622 | const char *name; | |
4623 | struct elf_link_hash_entry *h; | |
90c984fc | 4624 | struct elf_link_hash_entry *hi; |
0a1b45a2 AM |
4625 | bool definition; |
4626 | bool size_change_ok; | |
4627 | bool type_change_ok; | |
4628 | bool new_weak; | |
4629 | bool old_weak; | |
7ba11550 | 4630 | bfd *override; |
0a1b45a2 AM |
4631 | bool common; |
4632 | bool discarded; | |
4ad4eba5 | 4633 | unsigned int old_alignment; |
4538d1c7 | 4634 | unsigned int shindex; |
4ad4eba5 | 4635 | bfd *old_bfd; |
0a1b45a2 | 4636 | bool matched; |
4ad4eba5 | 4637 | |
7ba11550 | 4638 | override = NULL; |
4ad4eba5 AM |
4639 | |
4640 | flags = BSF_NO_FLAGS; | |
4641 | sec = NULL; | |
4642 | value = isym->st_value; | |
a4d8e49b | 4643 | common = bed->common_definition (isym); |
2980ccad L |
4644 | if (common && info->inhibit_common_definition) |
4645 | { | |
4646 | /* Treat common symbol as undefined for --no-define-common. */ | |
4647 | isym->st_shndx = SHN_UNDEF; | |
0a1b45a2 | 4648 | common = false; |
2980ccad | 4649 | } |
0a1b45a2 | 4650 | discarded = false; |
4ad4eba5 AM |
4651 | |
4652 | bind = ELF_ST_BIND (isym->st_info); | |
3e7a7d11 | 4653 | switch (bind) |
4ad4eba5 | 4654 | { |
3e7a7d11 | 4655 | case STB_LOCAL: |
4ad4eba5 AM |
4656 | /* This should be impossible, since ELF requires that all |
4657 | global symbols follow all local symbols, and that sh_info | |
4658 | point to the first global symbol. Unfortunately, Irix 5 | |
4659 | screws this up. */ | |
fe3fef62 AM |
4660 | if (elf_bad_symtab (abfd)) |
4661 | continue; | |
4662 | ||
4663 | /* If we aren't prepared to handle locals within the globals | |
4538d1c7 AM |
4664 | then we'll likely segfault on a NULL symbol hash if the |
4665 | symbol is ever referenced in relocations. */ | |
4666 | shindex = elf_elfheader (abfd)->e_shstrndx; | |
4667 | name = bfd_elf_string_from_elf_section (abfd, shindex, hdr->sh_name); | |
4668 | _bfd_error_handler (_("%pB: %s local symbol at index %lu" | |
4669 | " (>= sh_info of %lu)"), | |
4670 | abfd, name, (long) (isym - isymbuf + extsymoff), | |
4671 | (long) extsymoff); | |
4672 | ||
4673 | /* Dynamic object relocations are not processed by ld, so | |
4674 | ld won't run into the problem mentioned above. */ | |
4675 | if (dynamic) | |
4676 | continue; | |
fe3fef62 AM |
4677 | bfd_set_error (bfd_error_bad_value); |
4678 | goto error_free_vers; | |
3e7a7d11 NC |
4679 | |
4680 | case STB_GLOBAL: | |
a4d8e49b | 4681 | if (isym->st_shndx != SHN_UNDEF && !common) |
4ad4eba5 | 4682 | flags = BSF_GLOBAL; |
3e7a7d11 NC |
4683 | break; |
4684 | ||
4685 | case STB_WEAK: | |
4686 | flags = BSF_WEAK; | |
4687 | break; | |
4688 | ||
4689 | case STB_GNU_UNIQUE: | |
4690 | flags = BSF_GNU_UNIQUE; | |
4691 | break; | |
4692 | ||
4693 | default: | |
4ad4eba5 | 4694 | /* Leave it up to the processor backend. */ |
3e7a7d11 | 4695 | break; |
4ad4eba5 AM |
4696 | } |
4697 | ||
4698 | if (isym->st_shndx == SHN_UNDEF) | |
4699 | sec = bfd_und_section_ptr; | |
cb33740c AM |
4700 | else if (isym->st_shndx == SHN_ABS) |
4701 | sec = bfd_abs_section_ptr; | |
4702 | else if (isym->st_shndx == SHN_COMMON) | |
4703 | { | |
4704 | sec = bfd_com_section_ptr; | |
4705 | /* What ELF calls the size we call the value. What ELF | |
4706 | calls the value we call the alignment. */ | |
4707 | value = isym->st_size; | |
4708 | } | |
4709 | else | |
4ad4eba5 AM |
4710 | { |
4711 | sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
4712 | if (sec == NULL) | |
4713 | sec = bfd_abs_section_ptr; | |
dbaa2011 | 4714 | else if (discarded_section (sec)) |
529fcb95 | 4715 | { |
e5d08002 L |
4716 | /* Symbols from discarded section are undefined. We keep |
4717 | its visibility. */ | |
529fcb95 | 4718 | sec = bfd_und_section_ptr; |
0a1b45a2 | 4719 | discarded = true; |
529fcb95 PB |
4720 | isym->st_shndx = SHN_UNDEF; |
4721 | } | |
4ad4eba5 AM |
4722 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
4723 | value -= sec->vma; | |
4724 | } | |
4ad4eba5 AM |
4725 | |
4726 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
4727 | isym->st_name); | |
4728 | if (name == NULL) | |
4729 | goto error_free_vers; | |
4730 | ||
4731 | if (isym->st_shndx == SHN_COMMON | |
02d00247 AM |
4732 | && (abfd->flags & BFD_PLUGIN) != 0) |
4733 | { | |
4734 | asection *xc = bfd_get_section_by_name (abfd, "COMMON"); | |
4735 | ||
4736 | if (xc == NULL) | |
4737 | { | |
4738 | flagword sflags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP | |
4739 | | SEC_EXCLUDE); | |
4740 | xc = bfd_make_section_with_flags (abfd, "COMMON", sflags); | |
4741 | if (xc == NULL) | |
4742 | goto error_free_vers; | |
4743 | } | |
4744 | sec = xc; | |
4745 | } | |
4746 | else if (isym->st_shndx == SHN_COMMON | |
4747 | && ELF_ST_TYPE (isym->st_info) == STT_TLS | |
0e1862bb | 4748 | && !bfd_link_relocatable (info)) |
4ad4eba5 AM |
4749 | { |
4750 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
4751 | ||
4752 | if (tcomm == NULL) | |
4753 | { | |
02d00247 AM |
4754 | flagword sflags = (SEC_ALLOC | SEC_THREAD_LOCAL | SEC_IS_COMMON |
4755 | | SEC_LINKER_CREATED); | |
4756 | tcomm = bfd_make_section_with_flags (abfd, ".tcommon", sflags); | |
3496cb2a | 4757 | if (tcomm == NULL) |
4ad4eba5 AM |
4758 | goto error_free_vers; |
4759 | } | |
4760 | sec = tcomm; | |
4761 | } | |
66eb6687 | 4762 | else if (bed->elf_add_symbol_hook) |
4ad4eba5 | 4763 | { |
66eb6687 AM |
4764 | if (! (*bed->elf_add_symbol_hook) (abfd, info, isym, &name, &flags, |
4765 | &sec, &value)) | |
4ad4eba5 AM |
4766 | goto error_free_vers; |
4767 | ||
4768 | /* The hook function sets the name to NULL if this symbol | |
4769 | should be skipped for some reason. */ | |
4770 | if (name == NULL) | |
4771 | continue; | |
4772 | } | |
4773 | ||
4774 | /* Sanity check that all possibilities were handled. */ | |
4775 | if (sec == NULL) | |
4538d1c7 | 4776 | abort (); |
4ad4eba5 | 4777 | |
191c0c42 AM |
4778 | /* Silently discard TLS symbols from --just-syms. There's |
4779 | no way to combine a static TLS block with a new TLS block | |
4780 | for this executable. */ | |
4781 | if (ELF_ST_TYPE (isym->st_info) == STT_TLS | |
4782 | && sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
4783 | continue; | |
4784 | ||
4ad4eba5 AM |
4785 | if (bfd_is_und_section (sec) |
4786 | || bfd_is_com_section (sec)) | |
0a1b45a2 | 4787 | definition = false; |
4ad4eba5 | 4788 | else |
0a1b45a2 | 4789 | definition = true; |
4ad4eba5 | 4790 | |
0a1b45a2 | 4791 | size_change_ok = false; |
66eb6687 | 4792 | type_change_ok = bed->type_change_ok; |
0a1b45a2 AM |
4793 | old_weak = false; |
4794 | matched = false; | |
4ad4eba5 AM |
4795 | old_alignment = 0; |
4796 | old_bfd = NULL; | |
af44c138 | 4797 | new_sec = sec; |
4ad4eba5 | 4798 | |
66eb6687 | 4799 | if (is_elf_hash_table (htab)) |
4ad4eba5 AM |
4800 | { |
4801 | Elf_Internal_Versym iver; | |
4802 | unsigned int vernum = 0; | |
0a1b45a2 | 4803 | bool skip; |
4ad4eba5 | 4804 | |
fc0e6df6 | 4805 | if (ever == NULL) |
4ad4eba5 | 4806 | { |
fc0e6df6 PB |
4807 | if (info->default_imported_symver) |
4808 | /* Use the default symbol version created earlier. */ | |
4809 | iver.vs_vers = elf_tdata (abfd)->cverdefs; | |
4810 | else | |
4811 | iver.vs_vers = 0; | |
4812 | } | |
be22c732 NC |
4813 | else if (ever >= extversym_end) |
4814 | { | |
4815 | /* xgettext:c-format */ | |
4816 | _bfd_error_handler (_("%pB: not enough version information"), | |
4817 | abfd); | |
4818 | bfd_set_error (bfd_error_bad_value); | |
4819 | goto error_free_vers; | |
4820 | } | |
fc0e6df6 PB |
4821 | else |
4822 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
4823 | ||
4824 | vernum = iver.vs_vers & VERSYM_VERSION; | |
4825 | ||
4826 | /* If this is a hidden symbol, or if it is not version | |
4827 | 1, we append the version name to the symbol name. | |
cc86ff91 EB |
4828 | However, we do not modify a non-hidden absolute symbol |
4829 | if it is not a function, because it might be the version | |
4830 | symbol itself. FIXME: What if it isn't? */ | |
fc0e6df6 | 4831 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 |
fcb93ecf PB |
4832 | || (vernum > 1 |
4833 | && (!bfd_is_abs_section (sec) | |
4834 | || bed->is_function_type (ELF_ST_TYPE (isym->st_info))))) | |
fc0e6df6 PB |
4835 | { |
4836 | const char *verstr; | |
4837 | size_t namelen, verlen, newlen; | |
4838 | char *newname, *p; | |
4839 | ||
4840 | if (isym->st_shndx != SHN_UNDEF) | |
4ad4eba5 | 4841 | { |
fc0e6df6 PB |
4842 | if (vernum > elf_tdata (abfd)->cverdefs) |
4843 | verstr = NULL; | |
4844 | else if (vernum > 1) | |
4845 | verstr = | |
4846 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
4847 | else | |
4848 | verstr = ""; | |
4ad4eba5 | 4849 | |
fc0e6df6 | 4850 | if (verstr == NULL) |
4ad4eba5 | 4851 | { |
4eca0228 | 4852 | _bfd_error_handler |
695344c0 | 4853 | /* xgettext:c-format */ |
871b3ab2 | 4854 | (_("%pB: %s: invalid version %u (max %d)"), |
fc0e6df6 PB |
4855 | abfd, name, vernum, |
4856 | elf_tdata (abfd)->cverdefs); | |
4857 | bfd_set_error (bfd_error_bad_value); | |
4858 | goto error_free_vers; | |
4ad4eba5 | 4859 | } |
fc0e6df6 PB |
4860 | } |
4861 | else | |
4862 | { | |
4863 | /* We cannot simply test for the number of | |
4864 | entries in the VERNEED section since the | |
4865 | numbers for the needed versions do not start | |
4866 | at 0. */ | |
4867 | Elf_Internal_Verneed *t; | |
4868 | ||
4869 | verstr = NULL; | |
4870 | for (t = elf_tdata (abfd)->verref; | |
4871 | t != NULL; | |
4872 | t = t->vn_nextref) | |
4ad4eba5 | 4873 | { |
fc0e6df6 | 4874 | Elf_Internal_Vernaux *a; |
4ad4eba5 | 4875 | |
fc0e6df6 PB |
4876 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) |
4877 | { | |
4878 | if (a->vna_other == vernum) | |
4ad4eba5 | 4879 | { |
fc0e6df6 PB |
4880 | verstr = a->vna_nodename; |
4881 | break; | |
4ad4eba5 | 4882 | } |
4ad4eba5 | 4883 | } |
fc0e6df6 PB |
4884 | if (a != NULL) |
4885 | break; | |
4886 | } | |
4887 | if (verstr == NULL) | |
4888 | { | |
4eca0228 | 4889 | _bfd_error_handler |
695344c0 | 4890 | /* xgettext:c-format */ |
871b3ab2 | 4891 | (_("%pB: %s: invalid needed version %d"), |
fc0e6df6 PB |
4892 | abfd, name, vernum); |
4893 | bfd_set_error (bfd_error_bad_value); | |
4894 | goto error_free_vers; | |
4ad4eba5 | 4895 | } |
4ad4eba5 | 4896 | } |
fc0e6df6 PB |
4897 | |
4898 | namelen = strlen (name); | |
4899 | verlen = strlen (verstr); | |
4900 | newlen = namelen + verlen + 2; | |
4901 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4902 | && isym->st_shndx != SHN_UNDEF) | |
4903 | ++newlen; | |
4904 | ||
a50b1753 | 4905 | newname = (char *) bfd_hash_allocate (&htab->root.table, newlen); |
fc0e6df6 PB |
4906 | if (newname == NULL) |
4907 | goto error_free_vers; | |
4908 | memcpy (newname, name, namelen); | |
4909 | p = newname + namelen; | |
4910 | *p++ = ELF_VER_CHR; | |
4911 | /* If this is a defined non-hidden version symbol, | |
4912 | we add another @ to the name. This indicates the | |
4913 | default version of the symbol. */ | |
4914 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4915 | && isym->st_shndx != SHN_UNDEF) | |
4916 | *p++ = ELF_VER_CHR; | |
4917 | memcpy (p, verstr, verlen + 1); | |
4918 | ||
4919 | name = newname; | |
4ad4eba5 AM |
4920 | } |
4921 | ||
cd3416da AM |
4922 | /* If this symbol has default visibility and the user has |
4923 | requested we not re-export it, then mark it as hidden. */ | |
a0d49154 | 4924 | if (!bfd_is_und_section (sec) |
cd3416da | 4925 | && !dynamic |
ce875075 | 4926 | && abfd->no_export |
cd3416da AM |
4927 | && ELF_ST_VISIBILITY (isym->st_other) != STV_INTERNAL) |
4928 | isym->st_other = (STV_HIDDEN | |
4929 | | (isym->st_other & ~ELF_ST_VISIBILITY (-1))); | |
4930 | ||
4f3fedcf AM |
4931 | if (!_bfd_elf_merge_symbol (abfd, info, name, isym, &sec, &value, |
4932 | sym_hash, &old_bfd, &old_weak, | |
4933 | &old_alignment, &skip, &override, | |
6e33951e L |
4934 | &type_change_ok, &size_change_ok, |
4935 | &matched)) | |
4ad4eba5 AM |
4936 | goto error_free_vers; |
4937 | ||
4938 | if (skip) | |
4939 | continue; | |
4940 | ||
6e33951e L |
4941 | /* Override a definition only if the new symbol matches the |
4942 | existing one. */ | |
4943 | if (override && matched) | |
0a1b45a2 | 4944 | definition = false; |
4ad4eba5 AM |
4945 | |
4946 | h = *sym_hash; | |
4947 | while (h->root.type == bfd_link_hash_indirect | |
4948 | || h->root.type == bfd_link_hash_warning) | |
4949 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4950 | ||
4ad4eba5 | 4951 | if (elf_tdata (abfd)->verdef != NULL |
4ad4eba5 AM |
4952 | && vernum > 1 |
4953 | && definition) | |
4954 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
4955 | } | |
4956 | ||
4957 | if (! (_bfd_generic_link_add_one_symbol | |
7ba11550 | 4958 | (info, override ? override : abfd, name, flags, sec, value, |
0a1b45a2 | 4959 | NULL, false, bed->collect, |
4ad4eba5 AM |
4960 | (struct bfd_link_hash_entry **) sym_hash))) |
4961 | goto error_free_vers; | |
4962 | ||
4963 | h = *sym_hash; | |
90c984fc L |
4964 | /* We need to make sure that indirect symbol dynamic flags are |
4965 | updated. */ | |
4966 | hi = h; | |
4ad4eba5 AM |
4967 | while (h->root.type == bfd_link_hash_indirect |
4968 | || h->root.type == bfd_link_hash_warning) | |
4969 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3e7a7d11 | 4970 | |
d1cbe007 AM |
4971 | *sym_hash = h; |
4972 | ||
97196564 L |
4973 | /* Setting the index to -3 tells elf_link_output_extsym that |
4974 | this symbol is defined in a discarded section. */ | |
d1cbe007 | 4975 | if (discarded && is_elf_hash_table (htab)) |
97196564 L |
4976 | h->indx = -3; |
4977 | ||
37a9e49a | 4978 | new_weak = (flags & BSF_WEAK) != 0; |
4ad4eba5 AM |
4979 | if (dynamic |
4980 | && definition | |
37a9e49a | 4981 | && new_weak |
fcb93ecf | 4982 | && !bed->is_function_type (ELF_ST_TYPE (isym->st_info)) |
66eb6687 | 4983 | && is_elf_hash_table (htab) |
60d67dc8 | 4984 | && h->u.alias == NULL) |
4ad4eba5 AM |
4985 | { |
4986 | /* Keep a list of all weak defined non function symbols from | |
60d67dc8 AM |
4987 | a dynamic object, using the alias field. Later in this |
4988 | function we will set the alias field to the correct | |
4ad4eba5 AM |
4989 | value. We only put non-function symbols from dynamic |
4990 | objects on this list, because that happens to be the only | |
4991 | time we need to know the normal symbol corresponding to a | |
4992 | weak symbol, and the information is time consuming to | |
60d67dc8 | 4993 | figure out. If the alias field is not already NULL, |
4ad4eba5 AM |
4994 | then this symbol was already defined by some previous |
4995 | dynamic object, and we will be using that previous | |
4996 | definition anyhow. */ | |
4997 | ||
60d67dc8 | 4998 | h->u.alias = weaks; |
4ad4eba5 | 4999 | weaks = h; |
4ad4eba5 AM |
5000 | } |
5001 | ||
5002 | /* Set the alignment of a common symbol. */ | |
a4d8e49b | 5003 | if ((common || bfd_is_com_section (sec)) |
4ad4eba5 AM |
5004 | && h->root.type == bfd_link_hash_common) |
5005 | { | |
5006 | unsigned int align; | |
5007 | ||
a4d8e49b | 5008 | if (common) |
af44c138 L |
5009 | align = bfd_log2 (isym->st_value); |
5010 | else | |
5011 | { | |
5012 | /* The new symbol is a common symbol in a shared object. | |
5013 | We need to get the alignment from the section. */ | |
5014 | align = new_sec->alignment_power; | |
5015 | } | |
595213d4 | 5016 | if (align > old_alignment) |
4ad4eba5 AM |
5017 | h->root.u.c.p->alignment_power = align; |
5018 | else | |
5019 | h->root.u.c.p->alignment_power = old_alignment; | |
5020 | } | |
5021 | ||
66eb6687 | 5022 | if (is_elf_hash_table (htab)) |
4ad4eba5 | 5023 | { |
4f3fedcf AM |
5024 | /* Set a flag in the hash table entry indicating the type of |
5025 | reference or definition we just found. A dynamic symbol | |
5026 | is one which is referenced or defined by both a regular | |
5027 | object and a shared object. */ | |
0a1b45a2 | 5028 | bool dynsym = false; |
4f3fedcf | 5029 | |
b1a92c63 AM |
5030 | /* Plugin symbols aren't normal. Don't set def/ref flags. */ |
5031 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
bbaddd4b AM |
5032 | { |
5033 | /* Except for this flag to track nonweak references. */ | |
5034 | if (!definition | |
5035 | && bind != STB_WEAK) | |
5036 | h->ref_ir_nonweak = 1; | |
5037 | } | |
b1a92c63 | 5038 | else if (!dynamic) |
4f3fedcf AM |
5039 | { |
5040 | if (! definition) | |
5041 | { | |
5042 | h->ref_regular = 1; | |
5043 | if (bind != STB_WEAK) | |
5044 | h->ref_regular_nonweak = 1; | |
5045 | } | |
5046 | else | |
5047 | { | |
5048 | h->def_regular = 1; | |
5049 | if (h->def_dynamic) | |
5050 | { | |
5051 | h->def_dynamic = 0; | |
5052 | h->ref_dynamic = 1; | |
5053 | } | |
5054 | } | |
4f3fedcf AM |
5055 | } |
5056 | else | |
5057 | { | |
5058 | if (! definition) | |
5059 | { | |
5060 | h->ref_dynamic = 1; | |
5061 | hi->ref_dynamic = 1; | |
5062 | } | |
5063 | else | |
5064 | { | |
5065 | h->def_dynamic = 1; | |
5066 | hi->def_dynamic = 1; | |
5067 | } | |
b1a92c63 | 5068 | } |
4f3fedcf | 5069 | |
b1a92c63 AM |
5070 | /* If an indirect symbol has been forced local, don't |
5071 | make the real symbol dynamic. */ | |
5072 | if (h != hi && hi->forced_local) | |
5073 | ; | |
5074 | else if (!dynamic) | |
5075 | { | |
5076 | if (bfd_link_dll (info) | |
5077 | || h->def_dynamic | |
5078 | || h->ref_dynamic) | |
0a1b45a2 | 5079 | dynsym = true; |
b1a92c63 AM |
5080 | } |
5081 | else | |
5082 | { | |
5083 | if (h->def_regular | |
5084 | || h->ref_regular | |
5085 | || (h->is_weakalias | |
5086 | && weakdef (h)->dynindx != -1)) | |
0a1b45a2 | 5087 | dynsym = true; |
4f3fedcf AM |
5088 | } |
5089 | ||
5090 | /* Check to see if we need to add an indirect symbol for | |
5091 | the default name. */ | |
726d7d1e AM |
5092 | if ((definition |
5093 | || (!override && h->root.type == bfd_link_hash_common)) | |
5094 | && !(hi != h | |
5095 | && hi->versioned == versioned_hidden)) | |
4f3fedcf | 5096 | if (!_bfd_elf_add_default_symbol (abfd, info, h, name, isym, |
f01fb44c | 5097 | sec, value, &old_bfd, &dynsym)) |
4f3fedcf | 5098 | goto error_free_vers; |
4ad4eba5 AM |
5099 | |
5100 | /* Check the alignment when a common symbol is involved. This | |
5101 | can change when a common symbol is overridden by a normal | |
5102 | definition or a common symbol is ignored due to the old | |
5103 | normal definition. We need to make sure the maximum | |
5104 | alignment is maintained. */ | |
a4d8e49b | 5105 | if ((old_alignment || common) |
4ad4eba5 AM |
5106 | && h->root.type != bfd_link_hash_common) |
5107 | { | |
5108 | unsigned int common_align; | |
5109 | unsigned int normal_align; | |
5110 | unsigned int symbol_align; | |
5111 | bfd *normal_bfd; | |
5112 | bfd *common_bfd; | |
5113 | ||
3a81e825 AM |
5114 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
5115 | || h->root.type == bfd_link_hash_defweak); | |
5116 | ||
4ad4eba5 AM |
5117 | symbol_align = ffs (h->root.u.def.value) - 1; |
5118 | if (h->root.u.def.section->owner != NULL | |
0616a280 AM |
5119 | && (h->root.u.def.section->owner->flags |
5120 | & (DYNAMIC | BFD_PLUGIN)) == 0) | |
4ad4eba5 AM |
5121 | { |
5122 | normal_align = h->root.u.def.section->alignment_power; | |
5123 | if (normal_align > symbol_align) | |
5124 | normal_align = symbol_align; | |
5125 | } | |
5126 | else | |
5127 | normal_align = symbol_align; | |
5128 | ||
5129 | if (old_alignment) | |
5130 | { | |
5131 | common_align = old_alignment; | |
5132 | common_bfd = old_bfd; | |
5133 | normal_bfd = abfd; | |
5134 | } | |
5135 | else | |
5136 | { | |
5137 | common_align = bfd_log2 (isym->st_value); | |
5138 | common_bfd = abfd; | |
5139 | normal_bfd = old_bfd; | |
5140 | } | |
5141 | ||
5142 | if (normal_align < common_align) | |
d07676f8 NC |
5143 | { |
5144 | /* PR binutils/2735 */ | |
5145 | if (normal_bfd == NULL) | |
4eca0228 | 5146 | _bfd_error_handler |
695344c0 | 5147 | /* xgettext:c-format */ |
9793eb77 | 5148 | (_("warning: alignment %u of common symbol `%s' in %pB is" |
871b3ab2 | 5149 | " greater than the alignment (%u) of its section %pA"), |
c08bb8dd AM |
5150 | 1 << common_align, name, common_bfd, |
5151 | 1 << normal_align, h->root.u.def.section); | |
d07676f8 | 5152 | else |
4eca0228 | 5153 | _bfd_error_handler |
695344c0 | 5154 | /* xgettext:c-format */ |
9793eb77 | 5155 | (_("warning: alignment %u of symbol `%s' in %pB" |
871b3ab2 | 5156 | " is smaller than %u in %pB"), |
c08bb8dd AM |
5157 | 1 << normal_align, name, normal_bfd, |
5158 | 1 << common_align, common_bfd); | |
d07676f8 | 5159 | } |
4ad4eba5 AM |
5160 | } |
5161 | ||
83ad0046 | 5162 | /* Remember the symbol size if it isn't undefined. */ |
3a81e825 AM |
5163 | if (isym->st_size != 0 |
5164 | && isym->st_shndx != SHN_UNDEF | |
4ad4eba5 AM |
5165 | && (definition || h->size == 0)) |
5166 | { | |
83ad0046 L |
5167 | if (h->size != 0 |
5168 | && h->size != isym->st_size | |
5169 | && ! size_change_ok) | |
4eca0228 | 5170 | _bfd_error_handler |
695344c0 | 5171 | /* xgettext:c-format */ |
9793eb77 | 5172 | (_("warning: size of symbol `%s' changed" |
2dcf00ce AM |
5173 | " from %" PRIu64 " in %pB to %" PRIu64 " in %pB"), |
5174 | name, (uint64_t) h->size, old_bfd, | |
5175 | (uint64_t) isym->st_size, abfd); | |
4ad4eba5 AM |
5176 | |
5177 | h->size = isym->st_size; | |
5178 | } | |
5179 | ||
5180 | /* If this is a common symbol, then we always want H->SIZE | |
5181 | to be the size of the common symbol. The code just above | |
5182 | won't fix the size if a common symbol becomes larger. We | |
5183 | don't warn about a size change here, because that is | |
4f3fedcf | 5184 | covered by --warn-common. Allow changes between different |
fcb93ecf | 5185 | function types. */ |
4ad4eba5 AM |
5186 | if (h->root.type == bfd_link_hash_common) |
5187 | h->size = h->root.u.c.size; | |
5188 | ||
5189 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE | |
37a9e49a L |
5190 | && ((definition && !new_weak) |
5191 | || (old_weak && h->root.type == bfd_link_hash_common) | |
5192 | || h->type == STT_NOTYPE)) | |
4ad4eba5 | 5193 | { |
2955ec4c L |
5194 | unsigned int type = ELF_ST_TYPE (isym->st_info); |
5195 | ||
5196 | /* Turn an IFUNC symbol from a DSO into a normal FUNC | |
5197 | symbol. */ | |
5198 | if (type == STT_GNU_IFUNC | |
5199 | && (abfd->flags & DYNAMIC) != 0) | |
5200 | type = STT_FUNC; | |
4ad4eba5 | 5201 | |
2955ec4c L |
5202 | if (h->type != type) |
5203 | { | |
5204 | if (h->type != STT_NOTYPE && ! type_change_ok) | |
695344c0 | 5205 | /* xgettext:c-format */ |
4eca0228 | 5206 | _bfd_error_handler |
9793eb77 | 5207 | (_("warning: type of symbol `%s' changed" |
871b3ab2 | 5208 | " from %d to %d in %pB"), |
c08bb8dd | 5209 | name, h->type, type, abfd); |
2955ec4c L |
5210 | |
5211 | h->type = type; | |
5212 | } | |
4ad4eba5 AM |
5213 | } |
5214 | ||
54ac0771 | 5215 | /* Merge st_other field. */ |
5160d0f3 AM |
5216 | elf_merge_st_other (abfd, h, isym->st_other, sec, |
5217 | definition, dynamic); | |
4ad4eba5 | 5218 | |
c3df8c14 | 5219 | /* We don't want to make debug symbol dynamic. */ |
0e1862bb L |
5220 | if (definition |
5221 | && (sec->flags & SEC_DEBUGGING) | |
5222 | && !bfd_link_relocatable (info)) | |
0a1b45a2 | 5223 | dynsym = false; |
c3df8c14 | 5224 | |
b1a92c63 AM |
5225 | /* Nor should we make plugin symbols dynamic. */ |
5226 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
0a1b45a2 | 5227 | dynsym = false; |
b1a92c63 | 5228 | |
35fc36a8 | 5229 | if (definition) |
35399224 L |
5230 | { |
5231 | h->target_internal = isym->st_target_internal; | |
5232 | h->unique_global = (flags & BSF_GNU_UNIQUE) != 0; | |
5233 | } | |
35fc36a8 | 5234 | |
4ad4eba5 AM |
5235 | if (definition && !dynamic) |
5236 | { | |
5237 | char *p = strchr (name, ELF_VER_CHR); | |
5238 | if (p != NULL && p[1] != ELF_VER_CHR) | |
5239 | { | |
5240 | /* Queue non-default versions so that .symver x, x@FOO | |
5241 | aliases can be checked. */ | |
66eb6687 | 5242 | if (!nondeflt_vers) |
4ad4eba5 | 5243 | { |
986f0783 AM |
5244 | size_t amt = ((isymend - isym + 1) |
5245 | * sizeof (struct elf_link_hash_entry *)); | |
ca4be51c AM |
5246 | nondeflt_vers |
5247 | = (struct elf_link_hash_entry **) bfd_malloc (amt); | |
14b1c01e AM |
5248 | if (!nondeflt_vers) |
5249 | goto error_free_vers; | |
4ad4eba5 | 5250 | } |
66eb6687 | 5251 | nondeflt_vers[nondeflt_vers_cnt++] = h; |
4ad4eba5 AM |
5252 | } |
5253 | } | |
5254 | ||
b1a92c63 | 5255 | if (dynsym && h->dynindx == -1) |
4ad4eba5 | 5256 | { |
c152c796 | 5257 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4ad4eba5 | 5258 | goto error_free_vers; |
60d67dc8 AM |
5259 | if (h->is_weakalias |
5260 | && weakdef (h)->dynindx == -1) | |
4ad4eba5 | 5261 | { |
60d67dc8 | 5262 | if (!bfd_elf_link_record_dynamic_symbol (info, weakdef (h))) |
4ad4eba5 AM |
5263 | goto error_free_vers; |
5264 | } | |
5265 | } | |
1f599d0e | 5266 | else if (h->dynindx != -1) |
4ad4eba5 AM |
5267 | /* If the symbol already has a dynamic index, but |
5268 | visibility says it should not be visible, turn it into | |
5269 | a local symbol. */ | |
5270 | switch (ELF_ST_VISIBILITY (h->other)) | |
5271 | { | |
5272 | case STV_INTERNAL: | |
5273 | case STV_HIDDEN: | |
0a1b45a2 AM |
5274 | (*bed->elf_backend_hide_symbol) (info, h, true); |
5275 | dynsym = false; | |
4ad4eba5 AM |
5276 | break; |
5277 | } | |
5278 | ||
5279 | if (!add_needed | |
aef28989 | 5280 | && matched |
4ad4eba5 | 5281 | && definition |
f01fb44c | 5282 | && h->root.type != bfd_link_hash_indirect |
010e5ae2 | 5283 | && ((dynsym |
a896df97 | 5284 | && h->ref_regular_nonweak) |
b1a92c63 AM |
5285 | || (old_bfd != NULL |
5286 | && (old_bfd->flags & BFD_PLUGIN) != 0 | |
bbaddd4b AM |
5287 | && h->ref_ir_nonweak |
5288 | && !info->lto_all_symbols_read) | |
ffa9430d | 5289 | || (h->ref_dynamic_nonweak |
010e5ae2 | 5290 | && (elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0 |
7b15fa7a AM |
5291 | && !on_needed_list (elf_dt_name (abfd), |
5292 | htab->needed, NULL)))) | |
4ad4eba5 | 5293 | { |
4ad4eba5 AM |
5294 | const char *soname = elf_dt_name (abfd); |
5295 | ||
16e4ecc0 AM |
5296 | info->callbacks->minfo ("%!", soname, old_bfd, |
5297 | h->root.root.string); | |
5298 | ||
4ad4eba5 AM |
5299 | /* A symbol from a library loaded via DT_NEEDED of some |
5300 | other library is referenced by a regular object. | |
e56f61be | 5301 | Add a DT_NEEDED entry for it. Issue an error if |
b918acf9 NC |
5302 | --no-add-needed is used and the reference was not |
5303 | a weak one. */ | |
4f3fedcf | 5304 | if (old_bfd != NULL |
b918acf9 | 5305 | && (elf_dyn_lib_class (abfd) & DYN_NO_NEEDED) != 0) |
e56f61be | 5306 | { |
4eca0228 | 5307 | _bfd_error_handler |
695344c0 | 5308 | /* xgettext:c-format */ |
871b3ab2 | 5309 | (_("%pB: undefined reference to symbol '%s'"), |
4f3fedcf | 5310 | old_bfd, name); |
ff5ac77b | 5311 | bfd_set_error (bfd_error_missing_dso); |
e56f61be L |
5312 | goto error_free_vers; |
5313 | } | |
5314 | ||
a50b1753 | 5315 | elf_dyn_lib_class (abfd) = (enum dynamic_lib_link_class) |
ca4be51c | 5316 | (elf_dyn_lib_class (abfd) & ~DYN_AS_NEEDED); |
a5db907e | 5317 | |
e310298c AM |
5318 | /* Create dynamic sections for backends that require |
5319 | that be done before setup_gnu_properties. */ | |
5320 | if (!_bfd_elf_link_create_dynamic_sections (abfd, info)) | |
0a1b45a2 AM |
5321 | return false; |
5322 | add_needed = true; | |
4ad4eba5 AM |
5323 | } |
5324 | } | |
5325 | } | |
5326 | ||
a83ef4d1 L |
5327 | if (info->lto_plugin_active |
5328 | && !bfd_link_relocatable (info) | |
5329 | && (abfd->flags & BFD_PLUGIN) == 0 | |
5330 | && !just_syms | |
5331 | && extsymcount) | |
5332 | { | |
5333 | int r_sym_shift; | |
5334 | ||
5335 | if (bed->s->arch_size == 32) | |
5336 | r_sym_shift = 8; | |
5337 | else | |
5338 | r_sym_shift = 32; | |
5339 | ||
5340 | /* If linker plugin is enabled, set non_ir_ref_regular on symbols | |
5341 | referenced in regular objects so that linker plugin will get | |
5342 | the correct symbol resolution. */ | |
5343 | ||
5344 | sym_hash = elf_sym_hashes (abfd); | |
5345 | for (s = abfd->sections; s != NULL; s = s->next) | |
5346 | { | |
5347 | Elf_Internal_Rela *internal_relocs; | |
5348 | Elf_Internal_Rela *rel, *relend; | |
5349 | ||
5350 | /* Don't check relocations in excluded sections. */ | |
5351 | if ((s->flags & SEC_RELOC) == 0 | |
5352 | || s->reloc_count == 0 | |
5353 | || (s->flags & SEC_EXCLUDE) != 0 | |
5354 | || ((info->strip == strip_all | |
5355 | || info->strip == strip_debugger) | |
5356 | && (s->flags & SEC_DEBUGGING) != 0)) | |
5357 | continue; | |
5358 | ||
5359 | internal_relocs = _bfd_elf_link_read_relocs (abfd, s, NULL, | |
5360 | NULL, | |
5361 | info->keep_memory); | |
5362 | if (internal_relocs == NULL) | |
5363 | goto error_free_vers; | |
5364 | ||
5365 | rel = internal_relocs; | |
5366 | relend = rel + s->reloc_count; | |
5367 | for ( ; rel < relend; rel++) | |
5368 | { | |
5369 | unsigned long r_symndx = rel->r_info >> r_sym_shift; | |
5370 | struct elf_link_hash_entry *h; | |
5371 | ||
5372 | /* Skip local symbols. */ | |
5373 | if (r_symndx < extsymoff) | |
5374 | continue; | |
5375 | ||
5376 | h = sym_hash[r_symndx - extsymoff]; | |
5377 | if (h != NULL) | |
5378 | h->root.non_ir_ref_regular = 1; | |
5379 | } | |
5380 | ||
5381 | if (elf_section_data (s)->relocs != internal_relocs) | |
5382 | free (internal_relocs); | |
5383 | } | |
5384 | } | |
5385 | ||
c9594989 AM |
5386 | free (extversym); |
5387 | extversym = NULL; | |
5388 | free (isymbuf); | |
5389 | isymbuf = NULL; | |
66eb6687 AM |
5390 | |
5391 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
5392 | { | |
5393 | unsigned int i; | |
5394 | ||
5395 | /* Restore the symbol table. */ | |
f45794cb AM |
5396 | old_ent = (char *) old_tab + tabsize; |
5397 | memset (elf_sym_hashes (abfd), 0, | |
5398 | extsymcount * sizeof (struct elf_link_hash_entry *)); | |
4f87808c AM |
5399 | htab->root.table.table = old_table; |
5400 | htab->root.table.size = old_size; | |
5401 | htab->root.table.count = old_count; | |
66eb6687 | 5402 | memcpy (htab->root.table.table, old_tab, tabsize); |
66eb6687 AM |
5403 | htab->root.undefs = old_undefs; |
5404 | htab->root.undefs_tail = old_undefs_tail; | |
e310298c AM |
5405 | if (htab->dynstr != NULL) |
5406 | _bfd_elf_strtab_restore (htab->dynstr, old_strtab); | |
5b677558 AM |
5407 | free (old_strtab); |
5408 | old_strtab = NULL; | |
66eb6687 AM |
5409 | for (i = 0; i < htab->root.table.size; i++) |
5410 | { | |
5411 | struct bfd_hash_entry *p; | |
5412 | struct elf_link_hash_entry *h; | |
4070765b | 5413 | unsigned int non_ir_ref_dynamic; |
66eb6687 AM |
5414 | |
5415 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
5416 | { | |
4070765b | 5417 | /* Preserve non_ir_ref_dynamic so that this symbol |
59fa66c5 L |
5418 | will be exported when the dynamic lib becomes needed |
5419 | in the second pass. */ | |
7ba11550 AM |
5420 | h = (struct elf_link_hash_entry *) p; |
5421 | if (h->root.type == bfd_link_hash_warning) | |
5422 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4070765b | 5423 | non_ir_ref_dynamic = h->root.non_ir_ref_dynamic; |
7ba11550 | 5424 | |
2de92251 | 5425 | h = (struct elf_link_hash_entry *) p; |
7ba11550 AM |
5426 | memcpy (h, old_ent, htab->root.table.entsize); |
5427 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
5428 | if (h->root.type == bfd_link_hash_warning) |
5429 | { | |
a4542f1b | 5430 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
7ba11550 AM |
5431 | memcpy (h, old_ent, htab->root.table.entsize); |
5432 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 | 5433 | } |
a4542f1b | 5434 | if (h->root.type == bfd_link_hash_common) |
3e0882af | 5435 | { |
7ba11550 AM |
5436 | memcpy (h->root.u.c.p, old_ent, sizeof (*h->root.u.c.p)); |
5437 | old_ent = (char *) old_ent + sizeof (*h->root.u.c.p); | |
3e0882af | 5438 | } |
4070765b | 5439 | h->root.non_ir_ref_dynamic = non_ir_ref_dynamic; |
66eb6687 AM |
5440 | } |
5441 | } | |
5442 | ||
5061a885 AM |
5443 | /* Make a special call to the linker "notice" function to |
5444 | tell it that symbols added for crefs may need to be removed. */ | |
e5034e59 | 5445 | if (!(*bed->notice_as_needed) (abfd, info, notice_not_needed)) |
9af2a943 | 5446 | goto error_free_vers; |
5061a885 | 5447 | |
66eb6687 AM |
5448 | free (old_tab); |
5449 | objalloc_free_block ((struct objalloc *) htab->root.table.memory, | |
5450 | alloc_mark); | |
c9594989 | 5451 | free (nondeflt_vers); |
0a1b45a2 | 5452 | return true; |
66eb6687 | 5453 | } |
2de92251 | 5454 | |
66eb6687 AM |
5455 | if (old_tab != NULL) |
5456 | { | |
e5034e59 | 5457 | if (!(*bed->notice_as_needed) (abfd, info, notice_needed)) |
9af2a943 | 5458 | goto error_free_vers; |
66eb6687 AM |
5459 | free (old_tab); |
5460 | old_tab = NULL; | |
5461 | } | |
5462 | ||
c6e8a9a8 L |
5463 | /* Now that all the symbols from this input file are created, if |
5464 | not performing a relocatable link, handle .symver foo, foo@BAR | |
5465 | such that any relocs against foo become foo@BAR. */ | |
0e1862bb | 5466 | if (!bfd_link_relocatable (info) && nondeflt_vers != NULL) |
4ad4eba5 | 5467 | { |
ef53be89 | 5468 | size_t cnt, symidx; |
4ad4eba5 AM |
5469 | |
5470 | for (cnt = 0; cnt < nondeflt_vers_cnt; ++cnt) | |
5471 | { | |
5472 | struct elf_link_hash_entry *h = nondeflt_vers[cnt], *hi; | |
5473 | char *shortname, *p; | |
986f0783 | 5474 | size_t amt; |
4ad4eba5 AM |
5475 | |
5476 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
5477 | if (p == NULL | |
5478 | || (h->root.type != bfd_link_hash_defined | |
5479 | && h->root.type != bfd_link_hash_defweak)) | |
5480 | continue; | |
5481 | ||
5482 | amt = p - h->root.root.string; | |
a50b1753 | 5483 | shortname = (char *) bfd_malloc (amt + 1); |
14b1c01e AM |
5484 | if (!shortname) |
5485 | goto error_free_vers; | |
4ad4eba5 AM |
5486 | memcpy (shortname, h->root.root.string, amt); |
5487 | shortname[amt] = '\0'; | |
5488 | ||
5489 | hi = (struct elf_link_hash_entry *) | |
66eb6687 | 5490 | bfd_link_hash_lookup (&htab->root, shortname, |
0a1b45a2 | 5491 | false, false, false); |
4ad4eba5 AM |
5492 | if (hi != NULL |
5493 | && hi->root.type == h->root.type | |
5494 | && hi->root.u.def.value == h->root.u.def.value | |
5495 | && hi->root.u.def.section == h->root.u.def.section) | |
5496 | { | |
0a1b45a2 | 5497 | (*bed->elf_backend_hide_symbol) (info, hi, true); |
4ad4eba5 AM |
5498 | hi->root.type = bfd_link_hash_indirect; |
5499 | hi->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
fcfa13d2 | 5500 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
4ad4eba5 AM |
5501 | sym_hash = elf_sym_hashes (abfd); |
5502 | if (sym_hash) | |
5503 | for (symidx = 0; symidx < extsymcount; ++symidx) | |
5504 | if (sym_hash[symidx] == hi) | |
5505 | { | |
5506 | sym_hash[symidx] = h; | |
5507 | break; | |
5508 | } | |
5509 | } | |
5510 | free (shortname); | |
5511 | } | |
5512 | free (nondeflt_vers); | |
5513 | nondeflt_vers = NULL; | |
5514 | } | |
5515 | ||
60d67dc8 | 5516 | /* Now set the alias field correctly for all the weak defined |
4ad4eba5 AM |
5517 | symbols we found. The only way to do this is to search all the |
5518 | symbols. Since we only need the information for non functions in | |
5519 | dynamic objects, that's the only time we actually put anything on | |
5520 | the list WEAKS. We need this information so that if a regular | |
5521 | object refers to a symbol defined weakly in a dynamic object, the | |
5522 | real symbol in the dynamic object is also put in the dynamic | |
5523 | symbols; we also must arrange for both symbols to point to the | |
5524 | same memory location. We could handle the general case of symbol | |
5525 | aliasing, but a general symbol alias can only be generated in | |
5526 | assembler code, handling it correctly would be very time | |
5527 | consuming, and other ELF linkers don't handle general aliasing | |
5528 | either. */ | |
5529 | if (weaks != NULL) | |
5530 | { | |
5531 | struct elf_link_hash_entry **hpp; | |
5532 | struct elf_link_hash_entry **hppend; | |
5533 | struct elf_link_hash_entry **sorted_sym_hash; | |
5534 | struct elf_link_hash_entry *h; | |
986f0783 | 5535 | size_t sym_count, amt; |
4ad4eba5 AM |
5536 | |
5537 | /* Since we have to search the whole symbol list for each weak | |
5538 | defined symbol, search time for N weak defined symbols will be | |
5539 | O(N^2). Binary search will cut it down to O(NlogN). */ | |
986f0783 | 5540 | amt = extsymcount * sizeof (*sorted_sym_hash); |
3a3f4bf7 | 5541 | sorted_sym_hash = bfd_malloc (amt); |
4ad4eba5 AM |
5542 | if (sorted_sym_hash == NULL) |
5543 | goto error_return; | |
5544 | sym_hash = sorted_sym_hash; | |
5545 | hpp = elf_sym_hashes (abfd); | |
5546 | hppend = hpp + extsymcount; | |
5547 | sym_count = 0; | |
5548 | for (; hpp < hppend; hpp++) | |
5549 | { | |
5550 | h = *hpp; | |
5551 | if (h != NULL | |
5552 | && h->root.type == bfd_link_hash_defined | |
fcb93ecf | 5553 | && !bed->is_function_type (h->type)) |
4ad4eba5 AM |
5554 | { |
5555 | *sym_hash = h; | |
5556 | sym_hash++; | |
5557 | sym_count++; | |
5558 | } | |
5559 | } | |
5560 | ||
3a3f4bf7 | 5561 | qsort (sorted_sym_hash, sym_count, sizeof (*sorted_sym_hash), |
4ad4eba5 AM |
5562 | elf_sort_symbol); |
5563 | ||
5564 | while (weaks != NULL) | |
5565 | { | |
5566 | struct elf_link_hash_entry *hlook; | |
5567 | asection *slook; | |
5568 | bfd_vma vlook; | |
ed54588d | 5569 | size_t i, j, idx = 0; |
4ad4eba5 AM |
5570 | |
5571 | hlook = weaks; | |
60d67dc8 AM |
5572 | weaks = hlook->u.alias; |
5573 | hlook->u.alias = NULL; | |
4ad4eba5 | 5574 | |
e3e53eed AM |
5575 | if (hlook->root.type != bfd_link_hash_defined |
5576 | && hlook->root.type != bfd_link_hash_defweak) | |
5577 | continue; | |
5578 | ||
4ad4eba5 AM |
5579 | slook = hlook->root.u.def.section; |
5580 | vlook = hlook->root.u.def.value; | |
5581 | ||
4ad4eba5 AM |
5582 | i = 0; |
5583 | j = sym_count; | |
14160578 | 5584 | while (i != j) |
4ad4eba5 AM |
5585 | { |
5586 | bfd_signed_vma vdiff; | |
5587 | idx = (i + j) / 2; | |
14160578 | 5588 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
5589 | vdiff = vlook - h->root.u.def.value; |
5590 | if (vdiff < 0) | |
5591 | j = idx; | |
5592 | else if (vdiff > 0) | |
5593 | i = idx + 1; | |
5594 | else | |
5595 | { | |
d3435ae8 | 5596 | int sdiff = slook->id - h->root.u.def.section->id; |
4ad4eba5 AM |
5597 | if (sdiff < 0) |
5598 | j = idx; | |
5599 | else if (sdiff > 0) | |
5600 | i = idx + 1; | |
5601 | else | |
14160578 | 5602 | break; |
4ad4eba5 AM |
5603 | } |
5604 | } | |
5605 | ||
5606 | /* We didn't find a value/section match. */ | |
14160578 | 5607 | if (i == j) |
4ad4eba5 AM |
5608 | continue; |
5609 | ||
14160578 AM |
5610 | /* With multiple aliases, or when the weak symbol is already |
5611 | strongly defined, we have multiple matching symbols and | |
5612 | the binary search above may land on any of them. Step | |
5613 | one past the matching symbol(s). */ | |
5614 | while (++idx != j) | |
5615 | { | |
5616 | h = sorted_sym_hash[idx]; | |
5617 | if (h->root.u.def.section != slook | |
5618 | || h->root.u.def.value != vlook) | |
5619 | break; | |
5620 | } | |
5621 | ||
5622 | /* Now look back over the aliases. Since we sorted by size | |
5623 | as well as value and section, we'll choose the one with | |
5624 | the largest size. */ | |
5625 | while (idx-- != i) | |
4ad4eba5 | 5626 | { |
14160578 | 5627 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
5628 | |
5629 | /* Stop if value or section doesn't match. */ | |
14160578 AM |
5630 | if (h->root.u.def.section != slook |
5631 | || h->root.u.def.value != vlook) | |
4ad4eba5 AM |
5632 | break; |
5633 | else if (h != hlook) | |
5634 | { | |
60d67dc8 AM |
5635 | struct elf_link_hash_entry *t; |
5636 | ||
5637 | hlook->u.alias = h; | |
5638 | hlook->is_weakalias = 1; | |
5639 | t = h; | |
5640 | if (t->u.alias != NULL) | |
5641 | while (t->u.alias != h) | |
5642 | t = t->u.alias; | |
5643 | t->u.alias = hlook; | |
4ad4eba5 AM |
5644 | |
5645 | /* If the weak definition is in the list of dynamic | |
5646 | symbols, make sure the real definition is put | |
5647 | there as well. */ | |
5648 | if (hlook->dynindx != -1 && h->dynindx == -1) | |
5649 | { | |
c152c796 | 5650 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4dd07732 AM |
5651 | { |
5652 | err_free_sym_hash: | |
5653 | free (sorted_sym_hash); | |
5654 | goto error_return; | |
5655 | } | |
4ad4eba5 AM |
5656 | } |
5657 | ||
5658 | /* If the real definition is in the list of dynamic | |
5659 | symbols, make sure the weak definition is put | |
5660 | there as well. If we don't do this, then the | |
5661 | dynamic loader might not merge the entries for the | |
5662 | real definition and the weak definition. */ | |
5663 | if (h->dynindx != -1 && hlook->dynindx == -1) | |
5664 | { | |
c152c796 | 5665 | if (! bfd_elf_link_record_dynamic_symbol (info, hlook)) |
4dd07732 | 5666 | goto err_free_sym_hash; |
4ad4eba5 AM |
5667 | } |
5668 | break; | |
5669 | } | |
5670 | } | |
5671 | } | |
5672 | ||
5673 | free (sorted_sym_hash); | |
5674 | } | |
5675 | ||
33177bb1 AM |
5676 | if (bed->check_directives |
5677 | && !(*bed->check_directives) (abfd, info)) | |
0a1b45a2 | 5678 | return false; |
85fbca6a | 5679 | |
4ad4eba5 AM |
5680 | /* If this is a non-traditional link, try to optimize the handling |
5681 | of the .stab/.stabstr sections. */ | |
5682 | if (! dynamic | |
5683 | && ! info->traditional_format | |
66eb6687 | 5684 | && is_elf_hash_table (htab) |
4ad4eba5 AM |
5685 | && (info->strip != strip_all && info->strip != strip_debugger)) |
5686 | { | |
5687 | asection *stabstr; | |
5688 | ||
5689 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
5690 | if (stabstr != NULL) | |
5691 | { | |
5692 | bfd_size_type string_offset = 0; | |
5693 | asection *stab; | |
5694 | ||
5695 | for (stab = abfd->sections; stab; stab = stab->next) | |
08dedd66 | 5696 | if (startswith (stab->name, ".stab") |
4ad4eba5 AM |
5697 | && (!stab->name[5] || |
5698 | (stab->name[5] == '.' && ISDIGIT (stab->name[6]))) | |
5699 | && (stab->flags & SEC_MERGE) == 0 | |
5700 | && !bfd_is_abs_section (stab->output_section)) | |
5701 | { | |
5702 | struct bfd_elf_section_data *secdata; | |
5703 | ||
5704 | secdata = elf_section_data (stab); | |
66eb6687 AM |
5705 | if (! _bfd_link_section_stabs (abfd, &htab->stab_info, stab, |
5706 | stabstr, &secdata->sec_info, | |
4ad4eba5 AM |
5707 | &string_offset)) |
5708 | goto error_return; | |
5709 | if (secdata->sec_info) | |
dbaa2011 | 5710 | stab->sec_info_type = SEC_INFO_TYPE_STABS; |
4ad4eba5 AM |
5711 | } |
5712 | } | |
5713 | } | |
5714 | ||
e310298c | 5715 | if (dynamic && add_needed) |
4ad4eba5 AM |
5716 | { |
5717 | /* Add this bfd to the loaded list. */ | |
5718 | struct elf_link_loaded_list *n; | |
5719 | ||
ca4be51c | 5720 | n = (struct elf_link_loaded_list *) bfd_alloc (abfd, sizeof (*n)); |
4ad4eba5 AM |
5721 | if (n == NULL) |
5722 | goto error_return; | |
5723 | n->abfd = abfd; | |
e310298c AM |
5724 | n->next = htab->dyn_loaded; |
5725 | htab->dyn_loaded = n; | |
4ad4eba5 | 5726 | } |
e310298c AM |
5727 | if (dynamic && !add_needed |
5728 | && (elf_dyn_lib_class (abfd) & DYN_DT_NEEDED) != 0) | |
5729 | elf_dyn_lib_class (abfd) |= DYN_NO_NEEDED; | |
4ad4eba5 | 5730 | |
0a1b45a2 | 5731 | return true; |
4ad4eba5 AM |
5732 | |
5733 | error_free_vers: | |
c9594989 AM |
5734 | free (old_tab); |
5735 | free (old_strtab); | |
5736 | free (nondeflt_vers); | |
5737 | free (extversym); | |
4ad4eba5 | 5738 | error_free_sym: |
c9594989 | 5739 | free (isymbuf); |
4ad4eba5 | 5740 | error_return: |
0a1b45a2 | 5741 | return false; |
4ad4eba5 AM |
5742 | } |
5743 | ||
8387904d AM |
5744 | /* Return the linker hash table entry of a symbol that might be |
5745 | satisfied by an archive symbol. Return -1 on error. */ | |
5746 | ||
5747 | struct elf_link_hash_entry * | |
5748 | _bfd_elf_archive_symbol_lookup (bfd *abfd, | |
5749 | struct bfd_link_info *info, | |
5750 | const char *name) | |
5751 | { | |
5752 | struct elf_link_hash_entry *h; | |
5753 | char *p, *copy; | |
5754 | size_t len, first; | |
5755 | ||
0a1b45a2 | 5756 | h = elf_link_hash_lookup (elf_hash_table (info), name, false, false, true); |
8387904d AM |
5757 | if (h != NULL) |
5758 | return h; | |
5759 | ||
5760 | /* If this is a default version (the name contains @@), look up the | |
5761 | symbol again with only one `@' as well as without the version. | |
5762 | The effect is that references to the symbol with and without the | |
5763 | version will be matched by the default symbol in the archive. */ | |
5764 | ||
5765 | p = strchr (name, ELF_VER_CHR); | |
5766 | if (p == NULL || p[1] != ELF_VER_CHR) | |
5767 | return h; | |
5768 | ||
5769 | /* First check with only one `@'. */ | |
5770 | len = strlen (name); | |
a50b1753 | 5771 | copy = (char *) bfd_alloc (abfd, len); |
8387904d | 5772 | if (copy == NULL) |
e99955cd | 5773 | return (struct elf_link_hash_entry *) -1; |
8387904d AM |
5774 | |
5775 | first = p - name + 1; | |
5776 | memcpy (copy, name, first); | |
5777 | memcpy (copy + first, name + first + 1, len - first); | |
5778 | ||
0a1b45a2 | 5779 | h = elf_link_hash_lookup (elf_hash_table (info), copy, false, false, true); |
8387904d AM |
5780 | if (h == NULL) |
5781 | { | |
5782 | /* We also need to check references to the symbol without the | |
5783 | version. */ | |
5784 | copy[first - 1] = '\0'; | |
5785 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
0a1b45a2 | 5786 | false, false, true); |
8387904d AM |
5787 | } |
5788 | ||
5789 | bfd_release (abfd, copy); | |
5790 | return h; | |
5791 | } | |
5792 | ||
0ad989f9 | 5793 | /* Add symbols from an ELF archive file to the linker hash table. We |
13e570f8 AM |
5794 | don't use _bfd_generic_link_add_archive_symbols because we need to |
5795 | handle versioned symbols. | |
0ad989f9 L |
5796 | |
5797 | Fortunately, ELF archive handling is simpler than that done by | |
5798 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
5799 | oddities. In ELF, if we find a symbol in the archive map, and the | |
5800 | symbol is currently undefined, we know that we must pull in that | |
5801 | object file. | |
5802 | ||
5803 | Unfortunately, we do have to make multiple passes over the symbol | |
5804 | table until nothing further is resolved. */ | |
5805 | ||
0a1b45a2 | 5806 | static bool |
4ad4eba5 | 5807 | elf_link_add_archive_symbols (bfd *abfd, struct bfd_link_info *info) |
0ad989f9 L |
5808 | { |
5809 | symindex c; | |
13e570f8 | 5810 | unsigned char *included = NULL; |
0ad989f9 | 5811 | carsym *symdefs; |
0a1b45a2 | 5812 | bool loop; |
986f0783 | 5813 | size_t amt; |
8387904d AM |
5814 | const struct elf_backend_data *bed; |
5815 | struct elf_link_hash_entry * (*archive_symbol_lookup) | |
5816 | (bfd *, struct bfd_link_info *, const char *); | |
0ad989f9 L |
5817 | |
5818 | if (! bfd_has_map (abfd)) | |
5819 | { | |
5820 | /* An empty archive is a special case. */ | |
5821 | if (bfd_openr_next_archived_file (abfd, NULL) == NULL) | |
0a1b45a2 | 5822 | return true; |
0ad989f9 | 5823 | bfd_set_error (bfd_error_no_armap); |
0a1b45a2 | 5824 | return false; |
0ad989f9 L |
5825 | } |
5826 | ||
5827 | /* Keep track of all symbols we know to be already defined, and all | |
5828 | files we know to be already included. This is to speed up the | |
5829 | second and subsequent passes. */ | |
5830 | c = bfd_ardata (abfd)->symdef_count; | |
5831 | if (c == 0) | |
0a1b45a2 | 5832 | return true; |
986f0783 | 5833 | amt = c * sizeof (*included); |
13e570f8 AM |
5834 | included = (unsigned char *) bfd_zmalloc (amt); |
5835 | if (included == NULL) | |
0a1b45a2 | 5836 | return false; |
0ad989f9 L |
5837 | |
5838 | symdefs = bfd_ardata (abfd)->symdefs; | |
8387904d AM |
5839 | bed = get_elf_backend_data (abfd); |
5840 | archive_symbol_lookup = bed->elf_backend_archive_symbol_lookup; | |
0ad989f9 L |
5841 | |
5842 | do | |
5843 | { | |
5844 | file_ptr last; | |
5845 | symindex i; | |
5846 | carsym *symdef; | |
5847 | carsym *symdefend; | |
5848 | ||
0a1b45a2 | 5849 | loop = false; |
0ad989f9 L |
5850 | last = -1; |
5851 | ||
5852 | symdef = symdefs; | |
5853 | symdefend = symdef + c; | |
5854 | for (i = 0; symdef < symdefend; symdef++, i++) | |
5855 | { | |
5856 | struct elf_link_hash_entry *h; | |
5857 | bfd *element; | |
5858 | struct bfd_link_hash_entry *undefs_tail; | |
5859 | symindex mark; | |
5860 | ||
13e570f8 | 5861 | if (included[i]) |
0ad989f9 L |
5862 | continue; |
5863 | if (symdef->file_offset == last) | |
5864 | { | |
0a1b45a2 | 5865 | included[i] = true; |
0ad989f9 L |
5866 | continue; |
5867 | } | |
5868 | ||
8387904d | 5869 | h = archive_symbol_lookup (abfd, info, symdef->name); |
e99955cd | 5870 | if (h == (struct elf_link_hash_entry *) -1) |
8387904d | 5871 | goto error_return; |
0ad989f9 L |
5872 | |
5873 | if (h == NULL) | |
5874 | continue; | |
5875 | ||
75cfe082 AM |
5876 | if (h->root.type == bfd_link_hash_undefined) |
5877 | { | |
5878 | /* If the archive element has already been loaded then one | |
5879 | of the symbols defined by that element might have been | |
5880 | made undefined due to being in a discarded section. */ | |
5881 | if (h->indx == -3) | |
5882 | continue; | |
5883 | } | |
5884 | else if (h->root.type == bfd_link_hash_common) | |
0ad989f9 L |
5885 | { |
5886 | /* We currently have a common symbol. The archive map contains | |
5887 | a reference to this symbol, so we may want to include it. We | |
5888 | only want to include it however, if this archive element | |
5889 | contains a definition of the symbol, not just another common | |
5890 | declaration of it. | |
5891 | ||
5892 | Unfortunately some archivers (including GNU ar) will put | |
5893 | declarations of common symbols into their archive maps, as | |
5894 | well as real definitions, so we cannot just go by the archive | |
5895 | map alone. Instead we must read in the element's symbol | |
5896 | table and check that to see what kind of symbol definition | |
5897 | this is. */ | |
5898 | if (! elf_link_is_defined_archive_symbol (abfd, symdef)) | |
5899 | continue; | |
5900 | } | |
75cfe082 | 5901 | else |
0ad989f9 L |
5902 | { |
5903 | if (h->root.type != bfd_link_hash_undefweak) | |
13e570f8 | 5904 | /* Symbol must be defined. Don't check it again. */ |
0a1b45a2 | 5905 | included[i] = true; |
0ad989f9 L |
5906 | continue; |
5907 | } | |
5908 | ||
5909 | /* We need to include this archive member. */ | |
5910 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
5911 | if (element == NULL) | |
5912 | goto error_return; | |
5913 | ||
5914 | if (! bfd_check_format (element, bfd_object)) | |
5915 | goto error_return; | |
5916 | ||
0ad989f9 L |
5917 | undefs_tail = info->hash->undefs_tail; |
5918 | ||
0e144ba7 AM |
5919 | if (!(*info->callbacks |
5920 | ->add_archive_element) (info, element, symdef->name, &element)) | |
b95a0a31 | 5921 | continue; |
0e144ba7 | 5922 | if (!bfd_link_add_symbols (element, info)) |
0ad989f9 L |
5923 | goto error_return; |
5924 | ||
5925 | /* If there are any new undefined symbols, we need to make | |
5926 | another pass through the archive in order to see whether | |
5927 | they can be defined. FIXME: This isn't perfect, because | |
5928 | common symbols wind up on undefs_tail and because an | |
5929 | undefined symbol which is defined later on in this pass | |
5930 | does not require another pass. This isn't a bug, but it | |
5931 | does make the code less efficient than it could be. */ | |
5932 | if (undefs_tail != info->hash->undefs_tail) | |
0a1b45a2 | 5933 | loop = true; |
0ad989f9 L |
5934 | |
5935 | /* Look backward to mark all symbols from this object file | |
5936 | which we have already seen in this pass. */ | |
5937 | mark = i; | |
5938 | do | |
5939 | { | |
0a1b45a2 | 5940 | included[mark] = true; |
0ad989f9 L |
5941 | if (mark == 0) |
5942 | break; | |
5943 | --mark; | |
5944 | } | |
5945 | while (symdefs[mark].file_offset == symdef->file_offset); | |
5946 | ||
5947 | /* We mark subsequent symbols from this object file as we go | |
5948 | on through the loop. */ | |
5949 | last = symdef->file_offset; | |
5950 | } | |
5951 | } | |
5952 | while (loop); | |
5953 | ||
0ad989f9 | 5954 | free (included); |
0a1b45a2 | 5955 | return true; |
0ad989f9 L |
5956 | |
5957 | error_return: | |
c9594989 | 5958 | free (included); |
0a1b45a2 | 5959 | return false; |
0ad989f9 | 5960 | } |
4ad4eba5 AM |
5961 | |
5962 | /* Given an ELF BFD, add symbols to the global hash table as | |
5963 | appropriate. */ | |
5964 | ||
0a1b45a2 | 5965 | bool |
4ad4eba5 AM |
5966 | bfd_elf_link_add_symbols (bfd *abfd, struct bfd_link_info *info) |
5967 | { | |
5968 | switch (bfd_get_format (abfd)) | |
5969 | { | |
5970 | case bfd_object: | |
5971 | return elf_link_add_object_symbols (abfd, info); | |
5972 | case bfd_archive: | |
5973 | return elf_link_add_archive_symbols (abfd, info); | |
5974 | default: | |
5975 | bfd_set_error (bfd_error_wrong_format); | |
0a1b45a2 | 5976 | return false; |
4ad4eba5 AM |
5977 | } |
5978 | } | |
5a580b3a | 5979 | \f |
14b1c01e AM |
5980 | struct hash_codes_info |
5981 | { | |
5982 | unsigned long *hashcodes; | |
0a1b45a2 | 5983 | bool error; |
14b1c01e | 5984 | }; |
a0c8462f | 5985 | |
5a580b3a AM |
5986 | /* This function will be called though elf_link_hash_traverse to store |
5987 | all hash value of the exported symbols in an array. */ | |
5988 | ||
0a1b45a2 | 5989 | static bool |
5a580b3a AM |
5990 | elf_collect_hash_codes (struct elf_link_hash_entry *h, void *data) |
5991 | { | |
a50b1753 | 5992 | struct hash_codes_info *inf = (struct hash_codes_info *) data; |
5a580b3a | 5993 | const char *name; |
5a580b3a AM |
5994 | unsigned long ha; |
5995 | char *alc = NULL; | |
5996 | ||
5a580b3a AM |
5997 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5998 | if (h->dynindx == -1) | |
0a1b45a2 | 5999 | return true; |
5a580b3a AM |
6000 | |
6001 | name = h->root.root.string; | |
422f1182 | 6002 | if (h->versioned >= versioned) |
5a580b3a | 6003 | { |
422f1182 L |
6004 | char *p = strchr (name, ELF_VER_CHR); |
6005 | if (p != NULL) | |
14b1c01e | 6006 | { |
422f1182 L |
6007 | alc = (char *) bfd_malloc (p - name + 1); |
6008 | if (alc == NULL) | |
6009 | { | |
0a1b45a2 AM |
6010 | inf->error = true; |
6011 | return false; | |
422f1182 L |
6012 | } |
6013 | memcpy (alc, name, p - name); | |
6014 | alc[p - name] = '\0'; | |
6015 | name = alc; | |
14b1c01e | 6016 | } |
5a580b3a AM |
6017 | } |
6018 | ||
6019 | /* Compute the hash value. */ | |
6020 | ha = bfd_elf_hash (name); | |
6021 | ||
6022 | /* Store the found hash value in the array given as the argument. */ | |
14b1c01e | 6023 | *(inf->hashcodes)++ = ha; |
5a580b3a AM |
6024 | |
6025 | /* And store it in the struct so that we can put it in the hash table | |
6026 | later. */ | |
f6e332e6 | 6027 | h->u.elf_hash_value = ha; |
5a580b3a | 6028 | |
c9594989 | 6029 | free (alc); |
0a1b45a2 | 6030 | return true; |
5a580b3a AM |
6031 | } |
6032 | ||
fdc90cb4 JJ |
6033 | struct collect_gnu_hash_codes |
6034 | { | |
6035 | bfd *output_bfd; | |
6036 | const struct elf_backend_data *bed; | |
6037 | unsigned long int nsyms; | |
6038 | unsigned long int maskbits; | |
6039 | unsigned long int *hashcodes; | |
6040 | unsigned long int *hashval; | |
6041 | unsigned long int *indx; | |
6042 | unsigned long int *counts; | |
6043 | bfd_vma *bitmask; | |
6044 | bfd_byte *contents; | |
f16a9783 | 6045 | bfd_size_type xlat; |
fdc90cb4 JJ |
6046 | long int min_dynindx; |
6047 | unsigned long int bucketcount; | |
6048 | unsigned long int symindx; | |
6049 | long int local_indx; | |
6050 | long int shift1, shift2; | |
6051 | unsigned long int mask; | |
0a1b45a2 | 6052 | bool error; |
fdc90cb4 JJ |
6053 | }; |
6054 | ||
6055 | /* This function will be called though elf_link_hash_traverse to store | |
6056 | all hash value of the exported symbols in an array. */ | |
6057 | ||
0a1b45a2 | 6058 | static bool |
fdc90cb4 JJ |
6059 | elf_collect_gnu_hash_codes (struct elf_link_hash_entry *h, void *data) |
6060 | { | |
a50b1753 | 6061 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 | 6062 | const char *name; |
fdc90cb4 JJ |
6063 | unsigned long ha; |
6064 | char *alc = NULL; | |
6065 | ||
fdc90cb4 JJ |
6066 | /* Ignore indirect symbols. These are added by the versioning code. */ |
6067 | if (h->dynindx == -1) | |
0a1b45a2 | 6068 | return true; |
fdc90cb4 JJ |
6069 | |
6070 | /* Ignore also local symbols and undefined symbols. */ | |
6071 | if (! (*s->bed->elf_hash_symbol) (h)) | |
0a1b45a2 | 6072 | return true; |
fdc90cb4 JJ |
6073 | |
6074 | name = h->root.root.string; | |
422f1182 | 6075 | if (h->versioned >= versioned) |
fdc90cb4 | 6076 | { |
422f1182 L |
6077 | char *p = strchr (name, ELF_VER_CHR); |
6078 | if (p != NULL) | |
14b1c01e | 6079 | { |
422f1182 L |
6080 | alc = (char *) bfd_malloc (p - name + 1); |
6081 | if (alc == NULL) | |
6082 | { | |
0a1b45a2 AM |
6083 | s->error = true; |
6084 | return false; | |
422f1182 L |
6085 | } |
6086 | memcpy (alc, name, p - name); | |
6087 | alc[p - name] = '\0'; | |
6088 | name = alc; | |
14b1c01e | 6089 | } |
fdc90cb4 JJ |
6090 | } |
6091 | ||
6092 | /* Compute the hash value. */ | |
6093 | ha = bfd_elf_gnu_hash (name); | |
6094 | ||
6095 | /* Store the found hash value in the array for compute_bucket_count, | |
6096 | and also for .dynsym reordering purposes. */ | |
6097 | s->hashcodes[s->nsyms] = ha; | |
6098 | s->hashval[h->dynindx] = ha; | |
6099 | ++s->nsyms; | |
6100 | if (s->min_dynindx < 0 || s->min_dynindx > h->dynindx) | |
6101 | s->min_dynindx = h->dynindx; | |
6102 | ||
c9594989 | 6103 | free (alc); |
0a1b45a2 | 6104 | return true; |
fdc90cb4 JJ |
6105 | } |
6106 | ||
6107 | /* This function will be called though elf_link_hash_traverse to do | |
f16a9783 MS |
6108 | final dynamic symbol renumbering in case of .gnu.hash. |
6109 | If using .MIPS.xhash, invoke record_xhash_symbol to add symbol index | |
6110 | to the translation table. */ | |
fdc90cb4 | 6111 | |
0a1b45a2 | 6112 | static bool |
f16a9783 | 6113 | elf_gnu_hash_process_symidx (struct elf_link_hash_entry *h, void *data) |
fdc90cb4 | 6114 | { |
a50b1753 | 6115 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 JJ |
6116 | unsigned long int bucket; |
6117 | unsigned long int val; | |
6118 | ||
fdc90cb4 JJ |
6119 | /* Ignore indirect symbols. */ |
6120 | if (h->dynindx == -1) | |
0a1b45a2 | 6121 | return true; |
fdc90cb4 JJ |
6122 | |
6123 | /* Ignore also local symbols and undefined symbols. */ | |
6124 | if (! (*s->bed->elf_hash_symbol) (h)) | |
6125 | { | |
6126 | if (h->dynindx >= s->min_dynindx) | |
f16a9783 MS |
6127 | { |
6128 | if (s->bed->record_xhash_symbol != NULL) | |
6129 | { | |
6130 | (*s->bed->record_xhash_symbol) (h, 0); | |
6131 | s->local_indx++; | |
6132 | } | |
6133 | else | |
6134 | h->dynindx = s->local_indx++; | |
6135 | } | |
0a1b45a2 | 6136 | return true; |
fdc90cb4 JJ |
6137 | } |
6138 | ||
6139 | bucket = s->hashval[h->dynindx] % s->bucketcount; | |
6140 | val = (s->hashval[h->dynindx] >> s->shift1) | |
6141 | & ((s->maskbits >> s->shift1) - 1); | |
6142 | s->bitmask[val] |= ((bfd_vma) 1) << (s->hashval[h->dynindx] & s->mask); | |
6143 | s->bitmask[val] | |
6144 | |= ((bfd_vma) 1) << ((s->hashval[h->dynindx] >> s->shift2) & s->mask); | |
6145 | val = s->hashval[h->dynindx] & ~(unsigned long int) 1; | |
6146 | if (s->counts[bucket] == 1) | |
6147 | /* Last element terminates the chain. */ | |
6148 | val |= 1; | |
6149 | bfd_put_32 (s->output_bfd, val, | |
6150 | s->contents + (s->indx[bucket] - s->symindx) * 4); | |
6151 | --s->counts[bucket]; | |
f16a9783 MS |
6152 | if (s->bed->record_xhash_symbol != NULL) |
6153 | { | |
6154 | bfd_vma xlat_loc = s->xlat + (s->indx[bucket]++ - s->symindx) * 4; | |
6155 | ||
6156 | (*s->bed->record_xhash_symbol) (h, xlat_loc); | |
6157 | } | |
6158 | else | |
6159 | h->dynindx = s->indx[bucket]++; | |
0a1b45a2 | 6160 | return true; |
fdc90cb4 JJ |
6161 | } |
6162 | ||
6163 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ | |
6164 | ||
0a1b45a2 | 6165 | bool |
fdc90cb4 JJ |
6166 | _bfd_elf_hash_symbol (struct elf_link_hash_entry *h) |
6167 | { | |
6168 | return !(h->forced_local | |
6169 | || h->root.type == bfd_link_hash_undefined | |
6170 | || h->root.type == bfd_link_hash_undefweak | |
6171 | || ((h->root.type == bfd_link_hash_defined | |
6172 | || h->root.type == bfd_link_hash_defweak) | |
6173 | && h->root.u.def.section->output_section == NULL)); | |
6174 | } | |
6175 | ||
5a580b3a AM |
6176 | /* Array used to determine the number of hash table buckets to use |
6177 | based on the number of symbols there are. If there are fewer than | |
6178 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
6179 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
6180 | than 32771 buckets. */ | |
6181 | ||
6182 | static const size_t elf_buckets[] = | |
6183 | { | |
6184 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
6185 | 16411, 32771, 0 | |
6186 | }; | |
6187 | ||
6188 | /* Compute bucket count for hashing table. We do not use a static set | |
6189 | of possible tables sizes anymore. Instead we determine for all | |
6190 | possible reasonable sizes of the table the outcome (i.e., the | |
6191 | number of collisions etc) and choose the best solution. The | |
6192 | weighting functions are not too simple to allow the table to grow | |
6193 | without bounds. Instead one of the weighting factors is the size. | |
6194 | Therefore the result is always a good payoff between few collisions | |
6195 | (= short chain lengths) and table size. */ | |
6196 | static size_t | |
b20dd2ce | 6197 | compute_bucket_count (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
d40f3da9 AM |
6198 | unsigned long int *hashcodes ATTRIBUTE_UNUSED, |
6199 | unsigned long int nsyms, | |
6200 | int gnu_hash) | |
5a580b3a | 6201 | { |
5a580b3a | 6202 | size_t best_size = 0; |
5a580b3a | 6203 | unsigned long int i; |
5a580b3a | 6204 | |
5a580b3a AM |
6205 | /* We have a problem here. The following code to optimize the table |
6206 | size requires an integer type with more the 32 bits. If | |
6207 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
6208 | #ifdef BFD_HOST_U_64_BIT | |
6209 | if (info->optimize) | |
6210 | { | |
5a580b3a AM |
6211 | size_t minsize; |
6212 | size_t maxsize; | |
6213 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
5a580b3a | 6214 | bfd *dynobj = elf_hash_table (info)->dynobj; |
d40f3da9 | 6215 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; |
5a580b3a | 6216 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); |
fdc90cb4 | 6217 | unsigned long int *counts; |
d40f3da9 | 6218 | bfd_size_type amt; |
0883b6e0 | 6219 | unsigned int no_improvement_count = 0; |
5a580b3a AM |
6220 | |
6221 | /* Possible optimization parameters: if we have NSYMS symbols we say | |
6222 | that the hashing table must at least have NSYMS/4 and at most | |
6223 | 2*NSYMS buckets. */ | |
6224 | minsize = nsyms / 4; | |
6225 | if (minsize == 0) | |
6226 | minsize = 1; | |
6227 | best_size = maxsize = nsyms * 2; | |
fdc90cb4 JJ |
6228 | if (gnu_hash) |
6229 | { | |
6230 | if (minsize < 2) | |
6231 | minsize = 2; | |
6232 | if ((best_size & 31) == 0) | |
6233 | ++best_size; | |
6234 | } | |
5a580b3a AM |
6235 | |
6236 | /* Create array where we count the collisions in. We must use bfd_malloc | |
6237 | since the size could be large. */ | |
6238 | amt = maxsize; | |
6239 | amt *= sizeof (unsigned long int); | |
a50b1753 | 6240 | counts = (unsigned long int *) bfd_malloc (amt); |
5a580b3a | 6241 | if (counts == NULL) |
fdc90cb4 | 6242 | return 0; |
5a580b3a AM |
6243 | |
6244 | /* Compute the "optimal" size for the hash table. The criteria is a | |
6245 | minimal chain length. The minor criteria is (of course) the size | |
6246 | of the table. */ | |
6247 | for (i = minsize; i < maxsize; ++i) | |
6248 | { | |
6249 | /* Walk through the array of hashcodes and count the collisions. */ | |
6250 | BFD_HOST_U_64_BIT max; | |
6251 | unsigned long int j; | |
6252 | unsigned long int fact; | |
6253 | ||
fdc90cb4 JJ |
6254 | if (gnu_hash && (i & 31) == 0) |
6255 | continue; | |
6256 | ||
5a580b3a AM |
6257 | memset (counts, '\0', i * sizeof (unsigned long int)); |
6258 | ||
6259 | /* Determine how often each hash bucket is used. */ | |
6260 | for (j = 0; j < nsyms; ++j) | |
6261 | ++counts[hashcodes[j] % i]; | |
6262 | ||
6263 | /* For the weight function we need some information about the | |
6264 | pagesize on the target. This is information need not be 100% | |
6265 | accurate. Since this information is not available (so far) we | |
6266 | define it here to a reasonable default value. If it is crucial | |
6267 | to have a better value some day simply define this value. */ | |
6268 | # ifndef BFD_TARGET_PAGESIZE | |
6269 | # define BFD_TARGET_PAGESIZE (4096) | |
6270 | # endif | |
6271 | ||
fdc90cb4 JJ |
6272 | /* We in any case need 2 + DYNSYMCOUNT entries for the size values |
6273 | and the chains. */ | |
6274 | max = (2 + dynsymcount) * bed->s->sizeof_hash_entry; | |
5a580b3a AM |
6275 | |
6276 | # if 1 | |
6277 | /* Variant 1: optimize for short chains. We add the squares | |
6278 | of all the chain lengths (which favors many small chain | |
6279 | over a few long chains). */ | |
6280 | for (j = 0; j < i; ++j) | |
6281 | max += counts[j] * counts[j]; | |
6282 | ||
6283 | /* This adds penalties for the overall size of the table. */ | |
fdc90cb4 | 6284 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
6285 | max *= fact * fact; |
6286 | # else | |
6287 | /* Variant 2: Optimize a lot more for small table. Here we | |
6288 | also add squares of the size but we also add penalties for | |
6289 | empty slots (the +1 term). */ | |
6290 | for (j = 0; j < i; ++j) | |
6291 | max += (1 + counts[j]) * (1 + counts[j]); | |
6292 | ||
6293 | /* The overall size of the table is considered, but not as | |
6294 | strong as in variant 1, where it is squared. */ | |
fdc90cb4 | 6295 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
6296 | max *= fact; |
6297 | # endif | |
6298 | ||
6299 | /* Compare with current best results. */ | |
6300 | if (max < best_chlen) | |
6301 | { | |
6302 | best_chlen = max; | |
6303 | best_size = i; | |
ca4be51c | 6304 | no_improvement_count = 0; |
5a580b3a | 6305 | } |
0883b6e0 NC |
6306 | /* PR 11843: Avoid futile long searches for the best bucket size |
6307 | when there are a large number of symbols. */ | |
6308 | else if (++no_improvement_count == 100) | |
6309 | break; | |
5a580b3a AM |
6310 | } |
6311 | ||
6312 | free (counts); | |
6313 | } | |
6314 | else | |
6315 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
6316 | { | |
6317 | /* This is the fallback solution if no 64bit type is available or if we | |
6318 | are not supposed to spend much time on optimizations. We select the | |
6319 | bucket count using a fixed set of numbers. */ | |
6320 | for (i = 0; elf_buckets[i] != 0; i++) | |
6321 | { | |
6322 | best_size = elf_buckets[i]; | |
fdc90cb4 | 6323 | if (nsyms < elf_buckets[i + 1]) |
5a580b3a AM |
6324 | break; |
6325 | } | |
fdc90cb4 JJ |
6326 | if (gnu_hash && best_size < 2) |
6327 | best_size = 2; | |
5a580b3a AM |
6328 | } |
6329 | ||
5a580b3a AM |
6330 | return best_size; |
6331 | } | |
6332 | ||
d0bf826b AM |
6333 | /* Size any SHT_GROUP section for ld -r. */ |
6334 | ||
0a1b45a2 | 6335 | bool |
d0bf826b AM |
6336 | _bfd_elf_size_group_sections (struct bfd_link_info *info) |
6337 | { | |
6338 | bfd *ibfd; | |
57963c05 | 6339 | asection *s; |
d0bf826b | 6340 | |
c72f2fb2 | 6341 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
d0bf826b | 6342 | if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour |
57963c05 AM |
6343 | && (s = ibfd->sections) != NULL |
6344 | && s->sec_info_type != SEC_INFO_TYPE_JUST_SYMS | |
d0bf826b | 6345 | && !_bfd_elf_fixup_group_sections (ibfd, bfd_abs_section_ptr)) |
0a1b45a2 AM |
6346 | return false; |
6347 | return true; | |
d0bf826b AM |
6348 | } |
6349 | ||
04c3a755 NS |
6350 | /* Set a default stack segment size. The value in INFO wins. If it |
6351 | is unset, LEGACY_SYMBOL's value is used, and if that symbol is | |
6352 | undefined it is initialized. */ | |
6353 | ||
0a1b45a2 | 6354 | bool |
04c3a755 NS |
6355 | bfd_elf_stack_segment_size (bfd *output_bfd, |
6356 | struct bfd_link_info *info, | |
6357 | const char *legacy_symbol, | |
6358 | bfd_vma default_size) | |
6359 | { | |
6360 | struct elf_link_hash_entry *h = NULL; | |
6361 | ||
6362 | /* Look for legacy symbol. */ | |
6363 | if (legacy_symbol) | |
6364 | h = elf_link_hash_lookup (elf_hash_table (info), legacy_symbol, | |
0a1b45a2 | 6365 | false, false, false); |
04c3a755 NS |
6366 | if (h && (h->root.type == bfd_link_hash_defined |
6367 | || h->root.type == bfd_link_hash_defweak) | |
6368 | && h->def_regular | |
6369 | && (h->type == STT_NOTYPE || h->type == STT_OBJECT)) | |
6370 | { | |
6371 | /* The symbol has no type if specified on the command line. */ | |
6372 | h->type = STT_OBJECT; | |
6373 | if (info->stacksize) | |
695344c0 | 6374 | /* xgettext:c-format */ |
871b3ab2 | 6375 | _bfd_error_handler (_("%pB: stack size specified and %s set"), |
4eca0228 | 6376 | output_bfd, legacy_symbol); |
04c3a755 | 6377 | else if (h->root.u.def.section != bfd_abs_section_ptr) |
695344c0 | 6378 | /* xgettext:c-format */ |
871b3ab2 | 6379 | _bfd_error_handler (_("%pB: %s not absolute"), |
4eca0228 | 6380 | output_bfd, legacy_symbol); |
04c3a755 NS |
6381 | else |
6382 | info->stacksize = h->root.u.def.value; | |
6383 | } | |
6384 | ||
6385 | if (!info->stacksize) | |
6386 | /* If the user didn't set a size, or explicitly inhibit the | |
6387 | size, set it now. */ | |
6388 | info->stacksize = default_size; | |
6389 | ||
6390 | /* Provide the legacy symbol, if it is referenced. */ | |
6391 | if (h && (h->root.type == bfd_link_hash_undefined | |
6392 | || h->root.type == bfd_link_hash_undefweak)) | |
6393 | { | |
6394 | struct bfd_link_hash_entry *bh = NULL; | |
6395 | ||
6396 | if (!(_bfd_generic_link_add_one_symbol | |
6397 | (info, output_bfd, legacy_symbol, | |
6398 | BSF_GLOBAL, bfd_abs_section_ptr, | |
6399 | info->stacksize >= 0 ? info->stacksize : 0, | |
0a1b45a2 AM |
6400 | NULL, false, get_elf_backend_data (output_bfd)->collect, &bh))) |
6401 | return false; | |
04c3a755 NS |
6402 | |
6403 | h = (struct elf_link_hash_entry *) bh; | |
6404 | h->def_regular = 1; | |
6405 | h->type = STT_OBJECT; | |
6406 | } | |
6407 | ||
0a1b45a2 | 6408 | return true; |
04c3a755 NS |
6409 | } |
6410 | ||
b531344c MR |
6411 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ |
6412 | ||
6413 | struct elf_gc_sweep_symbol_info | |
6414 | { | |
6415 | struct bfd_link_info *info; | |
6416 | void (*hide_symbol) (struct bfd_link_info *, struct elf_link_hash_entry *, | |
0a1b45a2 | 6417 | bool); |
b531344c MR |
6418 | }; |
6419 | ||
0a1b45a2 | 6420 | static bool |
b531344c MR |
6421 | elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *data) |
6422 | { | |
6423 | if (!h->mark | |
6424 | && (((h->root.type == bfd_link_hash_defined | |
6425 | || h->root.type == bfd_link_hash_defweak) | |
6426 | && !((h->def_regular || ELF_COMMON_DEF_P (h)) | |
6427 | && h->root.u.def.section->gc_mark)) | |
6428 | || h->root.type == bfd_link_hash_undefined | |
6429 | || h->root.type == bfd_link_hash_undefweak)) | |
6430 | { | |
6431 | struct elf_gc_sweep_symbol_info *inf; | |
6432 | ||
6433 | inf = (struct elf_gc_sweep_symbol_info *) data; | |
0a1b45a2 | 6434 | (*inf->hide_symbol) (inf->info, h, true); |
b531344c MR |
6435 | h->def_regular = 0; |
6436 | h->ref_regular = 0; | |
6437 | h->ref_regular_nonweak = 0; | |
6438 | } | |
6439 | ||
0a1b45a2 | 6440 | return true; |
b531344c MR |
6441 | } |
6442 | ||
5a580b3a AM |
6443 | /* Set up the sizes and contents of the ELF dynamic sections. This is |
6444 | called by the ELF linker emulation before_allocation routine. We | |
6445 | must set the sizes of the sections before the linker sets the | |
6446 | addresses of the various sections. */ | |
6447 | ||
0a1b45a2 | 6448 | bool |
5a580b3a AM |
6449 | bfd_elf_size_dynamic_sections (bfd *output_bfd, |
6450 | const char *soname, | |
6451 | const char *rpath, | |
6452 | const char *filter_shlib, | |
7ee314fa AM |
6453 | const char *audit, |
6454 | const char *depaudit, | |
5a580b3a AM |
6455 | const char * const *auxiliary_filters, |
6456 | struct bfd_link_info *info, | |
fd91d419 | 6457 | asection **sinterpptr) |
5a580b3a | 6458 | { |
5a580b3a AM |
6459 | bfd *dynobj; |
6460 | const struct elf_backend_data *bed; | |
5a580b3a AM |
6461 | |
6462 | *sinterpptr = NULL; | |
6463 | ||
5a580b3a | 6464 | if (!is_elf_hash_table (info->hash)) |
0a1b45a2 | 6465 | return true; |
5a580b3a | 6466 | |
5a580b3a AM |
6467 | dynobj = elf_hash_table (info)->dynobj; |
6468 | ||
9a2a56cc | 6469 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) |
5a580b3a | 6470 | { |
902e9fc7 MR |
6471 | struct bfd_elf_version_tree *verdefs; |
6472 | struct elf_info_failed asvinfo; | |
5a580b3a AM |
6473 | struct bfd_elf_version_tree *t; |
6474 | struct bfd_elf_version_expr *d; | |
902e9fc7 | 6475 | asection *s; |
e6699019 | 6476 | size_t soname_indx; |
7ee314fa | 6477 | |
5a580b3a AM |
6478 | /* If we are supposed to export all symbols into the dynamic symbol |
6479 | table (this is not the normal case), then do so. */ | |
55255dae | 6480 | if (info->export_dynamic |
0e1862bb | 6481 | || (bfd_link_executable (info) && info->dynamic)) |
5a580b3a | 6482 | { |
3d13f3e9 AM |
6483 | struct elf_info_failed eif; |
6484 | ||
6485 | eif.info = info; | |
0a1b45a2 | 6486 | eif.failed = false; |
5a580b3a AM |
6487 | elf_link_hash_traverse (elf_hash_table (info), |
6488 | _bfd_elf_export_symbol, | |
6489 | &eif); | |
6490 | if (eif.failed) | |
0a1b45a2 | 6491 | return false; |
5a580b3a AM |
6492 | } |
6493 | ||
e6699019 L |
6494 | if (soname != NULL) |
6495 | { | |
6496 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
0a1b45a2 | 6497 | soname, true); |
e6699019 L |
6498 | if (soname_indx == (size_t) -1 |
6499 | || !_bfd_elf_add_dynamic_entry (info, DT_SONAME, soname_indx)) | |
0a1b45a2 | 6500 | return false; |
e6699019 L |
6501 | } |
6502 | else | |
6503 | soname_indx = (size_t) -1; | |
6504 | ||
5a580b3a | 6505 | /* Make all global versions with definition. */ |
fd91d419 | 6506 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 6507 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 6508 | if (!d->symver && d->literal) |
5a580b3a AM |
6509 | { |
6510 | const char *verstr, *name; | |
6511 | size_t namelen, verlen, newlen; | |
93252b1c | 6512 | char *newname, *p, leading_char; |
5a580b3a AM |
6513 | struct elf_link_hash_entry *newh; |
6514 | ||
93252b1c | 6515 | leading_char = bfd_get_symbol_leading_char (output_bfd); |
ae5a3597 | 6516 | name = d->pattern; |
93252b1c | 6517 | namelen = strlen (name) + (leading_char != '\0'); |
5a580b3a AM |
6518 | verstr = t->name; |
6519 | verlen = strlen (verstr); | |
6520 | newlen = namelen + verlen + 3; | |
6521 | ||
a50b1753 | 6522 | newname = (char *) bfd_malloc (newlen); |
5a580b3a | 6523 | if (newname == NULL) |
0a1b45a2 | 6524 | return false; |
93252b1c MF |
6525 | newname[0] = leading_char; |
6526 | memcpy (newname + (leading_char != '\0'), name, namelen); | |
5a580b3a AM |
6527 | |
6528 | /* Check the hidden versioned definition. */ | |
6529 | p = newname + namelen; | |
6530 | *p++ = ELF_VER_CHR; | |
6531 | memcpy (p, verstr, verlen + 1); | |
6532 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
0a1b45a2 AM |
6533 | newname, false, false, |
6534 | false); | |
5a580b3a AM |
6535 | if (newh == NULL |
6536 | || (newh->root.type != bfd_link_hash_defined | |
6537 | && newh->root.type != bfd_link_hash_defweak)) | |
6538 | { | |
6539 | /* Check the default versioned definition. */ | |
6540 | *p++ = ELF_VER_CHR; | |
6541 | memcpy (p, verstr, verlen + 1); | |
6542 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
0a1b45a2 AM |
6543 | newname, false, false, |
6544 | false); | |
5a580b3a AM |
6545 | } |
6546 | free (newname); | |
6547 | ||
6548 | /* Mark this version if there is a definition and it is | |
6549 | not defined in a shared object. */ | |
6550 | if (newh != NULL | |
f5385ebf | 6551 | && !newh->def_dynamic |
5a580b3a AM |
6552 | && (newh->root.type == bfd_link_hash_defined |
6553 | || newh->root.type == bfd_link_hash_defweak)) | |
6554 | d->symver = 1; | |
6555 | } | |
6556 | ||
6557 | /* Attach all the symbols to their version information. */ | |
5a580b3a | 6558 | asvinfo.info = info; |
0a1b45a2 | 6559 | asvinfo.failed = false; |
5a580b3a AM |
6560 | |
6561 | elf_link_hash_traverse (elf_hash_table (info), | |
6562 | _bfd_elf_link_assign_sym_version, | |
6563 | &asvinfo); | |
6564 | if (asvinfo.failed) | |
0a1b45a2 | 6565 | return false; |
5a580b3a AM |
6566 | |
6567 | if (!info->allow_undefined_version) | |
6568 | { | |
6569 | /* Check if all global versions have a definition. */ | |
0a1b45a2 | 6570 | bool all_defined = true; |
fd91d419 | 6571 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 6572 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 6573 | if (d->literal && !d->symver && !d->script) |
5a580b3a | 6574 | { |
4eca0228 | 6575 | _bfd_error_handler |
5a580b3a AM |
6576 | (_("%s: undefined version: %s"), |
6577 | d->pattern, t->name); | |
0a1b45a2 | 6578 | all_defined = false; |
5a580b3a AM |
6579 | } |
6580 | ||
6581 | if (!all_defined) | |
6582 | { | |
6583 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 6584 | return false; |
5a580b3a AM |
6585 | } |
6586 | } | |
6587 | ||
902e9fc7 MR |
6588 | /* Set up the version definition section. */ |
6589 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); | |
6590 | BFD_ASSERT (s != NULL); | |
5a580b3a | 6591 | |
902e9fc7 MR |
6592 | /* We may have created additional version definitions if we are |
6593 | just linking a regular application. */ | |
6594 | verdefs = info->version_info; | |
5a580b3a | 6595 | |
902e9fc7 MR |
6596 | /* Skip anonymous version tag. */ |
6597 | if (verdefs != NULL && verdefs->vernum == 0) | |
6598 | verdefs = verdefs->next; | |
5a580b3a | 6599 | |
902e9fc7 MR |
6600 | if (verdefs == NULL && !info->create_default_symver) |
6601 | s->flags |= SEC_EXCLUDE; | |
6602 | else | |
5a580b3a | 6603 | { |
902e9fc7 MR |
6604 | unsigned int cdefs; |
6605 | bfd_size_type size; | |
6606 | bfd_byte *p; | |
6607 | Elf_Internal_Verdef def; | |
6608 | Elf_Internal_Verdaux defaux; | |
6609 | struct bfd_link_hash_entry *bh; | |
6610 | struct elf_link_hash_entry *h; | |
6611 | const char *name; | |
5a580b3a | 6612 | |
902e9fc7 MR |
6613 | cdefs = 0; |
6614 | size = 0; | |
5a580b3a | 6615 | |
902e9fc7 MR |
6616 | /* Make space for the base version. */ |
6617 | size += sizeof (Elf_External_Verdef); | |
6618 | size += sizeof (Elf_External_Verdaux); | |
6619 | ++cdefs; | |
6620 | ||
6621 | /* Make space for the default version. */ | |
6622 | if (info->create_default_symver) | |
6623 | { | |
6624 | size += sizeof (Elf_External_Verdef); | |
6625 | ++cdefs; | |
3e3b46e5 PB |
6626 | } |
6627 | ||
5a580b3a AM |
6628 | for (t = verdefs; t != NULL; t = t->next) |
6629 | { | |
6630 | struct bfd_elf_version_deps *n; | |
6631 | ||
a6cc6b3b RO |
6632 | /* Don't emit base version twice. */ |
6633 | if (t->vernum == 0) | |
6634 | continue; | |
6635 | ||
5a580b3a AM |
6636 | size += sizeof (Elf_External_Verdef); |
6637 | size += sizeof (Elf_External_Verdaux); | |
6638 | ++cdefs; | |
6639 | ||
6640 | for (n = t->deps; n != NULL; n = n->next) | |
6641 | size += sizeof (Elf_External_Verdaux); | |
6642 | } | |
6643 | ||
eea6121a | 6644 | s->size = size; |
a50b1753 | 6645 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
eea6121a | 6646 | if (s->contents == NULL && s->size != 0) |
0a1b45a2 | 6647 | return false; |
5a580b3a AM |
6648 | |
6649 | /* Fill in the version definition section. */ | |
6650 | ||
6651 | p = s->contents; | |
6652 | ||
6653 | def.vd_version = VER_DEF_CURRENT; | |
6654 | def.vd_flags = VER_FLG_BASE; | |
6655 | def.vd_ndx = 1; | |
6656 | def.vd_cnt = 1; | |
3e3b46e5 PB |
6657 | if (info->create_default_symver) |
6658 | { | |
6659 | def.vd_aux = 2 * sizeof (Elf_External_Verdef); | |
6660 | def.vd_next = sizeof (Elf_External_Verdef); | |
6661 | } | |
6662 | else | |
6663 | { | |
6664 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6665 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6666 | + sizeof (Elf_External_Verdaux)); | |
6667 | } | |
5a580b3a | 6668 | |
ef53be89 | 6669 | if (soname_indx != (size_t) -1) |
5a580b3a AM |
6670 | { |
6671 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6672 | soname_indx); | |
6673 | def.vd_hash = bfd_elf_hash (soname); | |
6674 | defaux.vda_name = soname_indx; | |
3e3b46e5 | 6675 | name = soname; |
5a580b3a AM |
6676 | } |
6677 | else | |
6678 | { | |
ef53be89 | 6679 | size_t indx; |
5a580b3a | 6680 | |
765cf5f6 | 6681 | name = lbasename (bfd_get_filename (output_bfd)); |
5a580b3a AM |
6682 | def.vd_hash = bfd_elf_hash (name); |
6683 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
0a1b45a2 | 6684 | name, false); |
ef53be89 | 6685 | if (indx == (size_t) -1) |
0a1b45a2 | 6686 | return false; |
5a580b3a AM |
6687 | defaux.vda_name = indx; |
6688 | } | |
6689 | defaux.vda_next = 0; | |
6690 | ||
6691 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6692 | (Elf_External_Verdef *) p); | |
6693 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
6694 | if (info->create_default_symver) |
6695 | { | |
6696 | /* Add a symbol representing this version. */ | |
6697 | bh = NULL; | |
6698 | if (! (_bfd_generic_link_add_one_symbol | |
6699 | (info, dynobj, name, BSF_GLOBAL, bfd_abs_section_ptr, | |
0a1b45a2 | 6700 | 0, NULL, false, |
3e3b46e5 | 6701 | get_elf_backend_data (dynobj)->collect, &bh))) |
0a1b45a2 | 6702 | return false; |
3e3b46e5 PB |
6703 | h = (struct elf_link_hash_entry *) bh; |
6704 | h->non_elf = 0; | |
6705 | h->def_regular = 1; | |
6706 | h->type = STT_OBJECT; | |
6707 | h->verinfo.vertree = NULL; | |
6708 | ||
6709 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
0a1b45a2 | 6710 | return false; |
3e3b46e5 PB |
6711 | |
6712 | /* Create a duplicate of the base version with the same | |
6713 | aux block, but different flags. */ | |
6714 | def.vd_flags = 0; | |
6715 | def.vd_ndx = 2; | |
6716 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6717 | if (verdefs) | |
6718 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6719 | + sizeof (Elf_External_Verdaux)); | |
6720 | else | |
6721 | def.vd_next = 0; | |
6722 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6723 | (Elf_External_Verdef *) p); | |
6724 | p += sizeof (Elf_External_Verdef); | |
6725 | } | |
5a580b3a AM |
6726 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, |
6727 | (Elf_External_Verdaux *) p); | |
6728 | p += sizeof (Elf_External_Verdaux); | |
6729 | ||
6730 | for (t = verdefs; t != NULL; t = t->next) | |
6731 | { | |
6732 | unsigned int cdeps; | |
6733 | struct bfd_elf_version_deps *n; | |
5a580b3a | 6734 | |
a6cc6b3b RO |
6735 | /* Don't emit the base version twice. */ |
6736 | if (t->vernum == 0) | |
6737 | continue; | |
6738 | ||
5a580b3a AM |
6739 | cdeps = 0; |
6740 | for (n = t->deps; n != NULL; n = n->next) | |
6741 | ++cdeps; | |
6742 | ||
6743 | /* Add a symbol representing this version. */ | |
6744 | bh = NULL; | |
6745 | if (! (_bfd_generic_link_add_one_symbol | |
6746 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
0a1b45a2 | 6747 | 0, NULL, false, |
5a580b3a | 6748 | get_elf_backend_data (dynobj)->collect, &bh))) |
0a1b45a2 | 6749 | return false; |
5a580b3a | 6750 | h = (struct elf_link_hash_entry *) bh; |
f5385ebf AM |
6751 | h->non_elf = 0; |
6752 | h->def_regular = 1; | |
5a580b3a AM |
6753 | h->type = STT_OBJECT; |
6754 | h->verinfo.vertree = t; | |
6755 | ||
c152c796 | 6756 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
0a1b45a2 | 6757 | return false; |
5a580b3a AM |
6758 | |
6759 | def.vd_version = VER_DEF_CURRENT; | |
6760 | def.vd_flags = 0; | |
6761 | if (t->globals.list == NULL | |
6762 | && t->locals.list == NULL | |
6763 | && ! t->used) | |
6764 | def.vd_flags |= VER_FLG_WEAK; | |
3e3b46e5 | 6765 | def.vd_ndx = t->vernum + (info->create_default_symver ? 2 : 1); |
5a580b3a AM |
6766 | def.vd_cnt = cdeps + 1; |
6767 | def.vd_hash = bfd_elf_hash (t->name); | |
6768 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6769 | def.vd_next = 0; | |
a6cc6b3b RO |
6770 | |
6771 | /* If a basever node is next, it *must* be the last node in | |
6772 | the chain, otherwise Verdef construction breaks. */ | |
6773 | if (t->next != NULL && t->next->vernum == 0) | |
6774 | BFD_ASSERT (t->next->next == NULL); | |
6775 | ||
6776 | if (t->next != NULL && t->next->vernum != 0) | |
5a580b3a AM |
6777 | def.vd_next = (sizeof (Elf_External_Verdef) |
6778 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
6779 | ||
6780 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6781 | (Elf_External_Verdef *) p); | |
6782 | p += sizeof (Elf_External_Verdef); | |
6783 | ||
6784 | defaux.vda_name = h->dynstr_index; | |
6785 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6786 | h->dynstr_index); | |
6787 | defaux.vda_next = 0; | |
6788 | if (t->deps != NULL) | |
6789 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6790 | t->name_indx = defaux.vda_name; | |
6791 | ||
6792 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6793 | (Elf_External_Verdaux *) p); | |
6794 | p += sizeof (Elf_External_Verdaux); | |
6795 | ||
6796 | for (n = t->deps; n != NULL; n = n->next) | |
6797 | { | |
6798 | if (n->version_needed == NULL) | |
6799 | { | |
6800 | /* This can happen if there was an error in the | |
6801 | version script. */ | |
6802 | defaux.vda_name = 0; | |
6803 | } | |
6804 | else | |
6805 | { | |
6806 | defaux.vda_name = n->version_needed->name_indx; | |
6807 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6808 | defaux.vda_name); | |
6809 | } | |
6810 | if (n->next == NULL) | |
6811 | defaux.vda_next = 0; | |
6812 | else | |
6813 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6814 | ||
6815 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6816 | (Elf_External_Verdaux *) p); | |
6817 | p += sizeof (Elf_External_Verdaux); | |
6818 | } | |
6819 | } | |
6820 | ||
5a580b3a AM |
6821 | elf_tdata (output_bfd)->cverdefs = cdefs; |
6822 | } | |
902e9fc7 MR |
6823 | } |
6824 | ||
6825 | bed = get_elf_backend_data (output_bfd); | |
6826 | ||
6827 | if (info->gc_sections && bed->can_gc_sections) | |
6828 | { | |
6829 | struct elf_gc_sweep_symbol_info sweep_info; | |
902e9fc7 MR |
6830 | |
6831 | /* Remove the symbols that were in the swept sections from the | |
3d13f3e9 | 6832 | dynamic symbol table. */ |
902e9fc7 MR |
6833 | sweep_info.info = info; |
6834 | sweep_info.hide_symbol = bed->elf_backend_hide_symbol; | |
6835 | elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol, | |
6836 | &sweep_info); | |
3d13f3e9 AM |
6837 | } |
6838 | ||
6839 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) | |
6840 | { | |
6841 | asection *s; | |
6842 | struct elf_find_verdep_info sinfo; | |
6843 | ||
6844 | /* Work out the size of the version reference section. */ | |
6845 | ||
6846 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); | |
6847 | BFD_ASSERT (s != NULL); | |
902e9fc7 | 6848 | |
3d13f3e9 AM |
6849 | sinfo.info = info; |
6850 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
6851 | if (sinfo.vers == 0) | |
6852 | sinfo.vers = 1; | |
0a1b45a2 | 6853 | sinfo.failed = false; |
3d13f3e9 AM |
6854 | |
6855 | elf_link_hash_traverse (elf_hash_table (info), | |
6856 | _bfd_elf_link_find_version_dependencies, | |
6857 | &sinfo); | |
6858 | if (sinfo.failed) | |
0a1b45a2 | 6859 | return false; |
3d13f3e9 AM |
6860 | |
6861 | if (elf_tdata (output_bfd)->verref == NULL) | |
6862 | s->flags |= SEC_EXCLUDE; | |
6863 | else | |
6864 | { | |
6865 | Elf_Internal_Verneed *vn; | |
6866 | unsigned int size; | |
6867 | unsigned int crefs; | |
6868 | bfd_byte *p; | |
6869 | ||
6870 | /* Build the version dependency section. */ | |
6871 | size = 0; | |
6872 | crefs = 0; | |
6873 | for (vn = elf_tdata (output_bfd)->verref; | |
6874 | vn != NULL; | |
6875 | vn = vn->vn_nextref) | |
6876 | { | |
6877 | Elf_Internal_Vernaux *a; | |
6878 | ||
6879 | size += sizeof (Elf_External_Verneed); | |
6880 | ++crefs; | |
6881 | for (a = vn->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6882 | size += sizeof (Elf_External_Vernaux); | |
6883 | } | |
6884 | ||
6885 | s->size = size; | |
6886 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); | |
6887 | if (s->contents == NULL) | |
0a1b45a2 | 6888 | return false; |
3d13f3e9 AM |
6889 | |
6890 | p = s->contents; | |
6891 | for (vn = elf_tdata (output_bfd)->verref; | |
6892 | vn != NULL; | |
6893 | vn = vn->vn_nextref) | |
6894 | { | |
6895 | unsigned int caux; | |
6896 | Elf_Internal_Vernaux *a; | |
6897 | size_t indx; | |
6898 | ||
6899 | caux = 0; | |
6900 | for (a = vn->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6901 | ++caux; | |
6902 | ||
6903 | vn->vn_version = VER_NEED_CURRENT; | |
6904 | vn->vn_cnt = caux; | |
6905 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6906 | elf_dt_name (vn->vn_bfd) != NULL | |
6907 | ? elf_dt_name (vn->vn_bfd) | |
765cf5f6 AM |
6908 | : lbasename (bfd_get_filename |
6909 | (vn->vn_bfd)), | |
0a1b45a2 | 6910 | false); |
3d13f3e9 | 6911 | if (indx == (size_t) -1) |
0a1b45a2 | 6912 | return false; |
3d13f3e9 AM |
6913 | vn->vn_file = indx; |
6914 | vn->vn_aux = sizeof (Elf_External_Verneed); | |
6915 | if (vn->vn_nextref == NULL) | |
6916 | vn->vn_next = 0; | |
6917 | else | |
6918 | vn->vn_next = (sizeof (Elf_External_Verneed) | |
6919 | + caux * sizeof (Elf_External_Vernaux)); | |
6920 | ||
6921 | _bfd_elf_swap_verneed_out (output_bfd, vn, | |
6922 | (Elf_External_Verneed *) p); | |
6923 | p += sizeof (Elf_External_Verneed); | |
6924 | ||
6925 | for (a = vn->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6926 | { | |
6927 | a->vna_hash = bfd_elf_hash (a->vna_nodename); | |
6928 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
0a1b45a2 | 6929 | a->vna_nodename, false); |
3d13f3e9 | 6930 | if (indx == (size_t) -1) |
0a1b45a2 | 6931 | return false; |
3d13f3e9 AM |
6932 | a->vna_name = indx; |
6933 | if (a->vna_nextptr == NULL) | |
6934 | a->vna_next = 0; | |
6935 | else | |
6936 | a->vna_next = sizeof (Elf_External_Vernaux); | |
6937 | ||
6938 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
6939 | (Elf_External_Vernaux *) p); | |
6940 | p += sizeof (Elf_External_Vernaux); | |
6941 | } | |
6942 | } | |
6943 | ||
6944 | elf_tdata (output_bfd)->cverrefs = crefs; | |
6945 | } | |
902e9fc7 MR |
6946 | } |
6947 | ||
6948 | /* Any syms created from now on start with -1 in | |
6949 | got.refcount/offset and plt.refcount/offset. */ | |
6950 | elf_hash_table (info)->init_got_refcount | |
6951 | = elf_hash_table (info)->init_got_offset; | |
6952 | elf_hash_table (info)->init_plt_refcount | |
6953 | = elf_hash_table (info)->init_plt_offset; | |
6954 | ||
6955 | if (bfd_link_relocatable (info) | |
6956 | && !_bfd_elf_size_group_sections (info)) | |
0a1b45a2 | 6957 | return false; |
902e9fc7 MR |
6958 | |
6959 | /* The backend may have to create some sections regardless of whether | |
6960 | we're dynamic or not. */ | |
6961 | if (bed->elf_backend_always_size_sections | |
6962 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
0a1b45a2 | 6963 | return false; |
902e9fc7 MR |
6964 | |
6965 | /* Determine any GNU_STACK segment requirements, after the backend | |
6966 | has had a chance to set a default segment size. */ | |
6967 | if (info->execstack) | |
6968 | elf_stack_flags (output_bfd) = PF_R | PF_W | PF_X; | |
6969 | else if (info->noexecstack) | |
6970 | elf_stack_flags (output_bfd) = PF_R | PF_W; | |
6971 | else | |
6972 | { | |
6973 | bfd *inputobj; | |
6974 | asection *notesec = NULL; | |
6975 | int exec = 0; | |
6976 | ||
6977 | for (inputobj = info->input_bfds; | |
6978 | inputobj; | |
6979 | inputobj = inputobj->link.next) | |
6980 | { | |
6981 | asection *s; | |
6982 | ||
6983 | if (inputobj->flags | |
6984 | & (DYNAMIC | EXEC_P | BFD_PLUGIN | BFD_LINKER_CREATED)) | |
6985 | continue; | |
57963c05 AM |
6986 | s = inputobj->sections; |
6987 | if (s == NULL || s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
6988 | continue; | |
6989 | ||
902e9fc7 MR |
6990 | s = bfd_get_section_by_name (inputobj, ".note.GNU-stack"); |
6991 | if (s) | |
6992 | { | |
6993 | if (s->flags & SEC_CODE) | |
6994 | exec = PF_X; | |
6995 | notesec = s; | |
6996 | } | |
6997 | else if (bed->default_execstack) | |
6998 | exec = PF_X; | |
6999 | } | |
7000 | if (notesec || info->stacksize > 0) | |
7001 | elf_stack_flags (output_bfd) = PF_R | PF_W | exec; | |
7002 | if (notesec && exec && bfd_link_relocatable (info) | |
7003 | && notesec->output_section != bfd_abs_section_ptr) | |
7004 | notesec->output_section->flags |= SEC_CODE; | |
7005 | } | |
7006 | ||
7007 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) | |
7008 | { | |
7009 | struct elf_info_failed eif; | |
7010 | struct elf_link_hash_entry *h; | |
7011 | asection *dynstr; | |
7012 | asection *s; | |
7013 | ||
7014 | *sinterpptr = bfd_get_linker_section (dynobj, ".interp"); | |
7015 | BFD_ASSERT (*sinterpptr != NULL || !bfd_link_executable (info) || info->nointerp); | |
7016 | ||
902e9fc7 MR |
7017 | if (info->symbolic) |
7018 | { | |
7019 | if (!_bfd_elf_add_dynamic_entry (info, DT_SYMBOLIC, 0)) | |
0a1b45a2 | 7020 | return false; |
902e9fc7 MR |
7021 | info->flags |= DF_SYMBOLIC; |
7022 | } | |
7023 | ||
7024 | if (rpath != NULL) | |
7025 | { | |
7026 | size_t indx; | |
7027 | bfd_vma tag; | |
7028 | ||
7029 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, | |
0a1b45a2 | 7030 | true); |
902e9fc7 | 7031 | if (indx == (size_t) -1) |
0a1b45a2 | 7032 | return false; |
902e9fc7 MR |
7033 | |
7034 | tag = info->new_dtags ? DT_RUNPATH : DT_RPATH; | |
7035 | if (!_bfd_elf_add_dynamic_entry (info, tag, indx)) | |
0a1b45a2 | 7036 | return false; |
902e9fc7 MR |
7037 | } |
7038 | ||
7039 | if (filter_shlib != NULL) | |
7040 | { | |
7041 | size_t indx; | |
7042 | ||
7043 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
0a1b45a2 | 7044 | filter_shlib, true); |
902e9fc7 MR |
7045 | if (indx == (size_t) -1 |
7046 | || !_bfd_elf_add_dynamic_entry (info, DT_FILTER, indx)) | |
0a1b45a2 | 7047 | return false; |
902e9fc7 MR |
7048 | } |
7049 | ||
7050 | if (auxiliary_filters != NULL) | |
7051 | { | |
7052 | const char * const *p; | |
7053 | ||
7054 | for (p = auxiliary_filters; *p != NULL; p++) | |
7055 | { | |
7056 | size_t indx; | |
7057 | ||
7058 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
0a1b45a2 | 7059 | *p, true); |
902e9fc7 MR |
7060 | if (indx == (size_t) -1 |
7061 | || !_bfd_elf_add_dynamic_entry (info, DT_AUXILIARY, indx)) | |
0a1b45a2 | 7062 | return false; |
902e9fc7 MR |
7063 | } |
7064 | } | |
7065 | ||
7066 | if (audit != NULL) | |
7067 | { | |
7068 | size_t indx; | |
7069 | ||
7070 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, audit, | |
0a1b45a2 | 7071 | true); |
902e9fc7 MR |
7072 | if (indx == (size_t) -1 |
7073 | || !_bfd_elf_add_dynamic_entry (info, DT_AUDIT, indx)) | |
0a1b45a2 | 7074 | return false; |
902e9fc7 MR |
7075 | } |
7076 | ||
7077 | if (depaudit != NULL) | |
7078 | { | |
7079 | size_t indx; | |
7080 | ||
7081 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, depaudit, | |
0a1b45a2 | 7082 | true); |
902e9fc7 MR |
7083 | if (indx == (size_t) -1 |
7084 | || !_bfd_elf_add_dynamic_entry (info, DT_DEPAUDIT, indx)) | |
0a1b45a2 | 7085 | return false; |
902e9fc7 MR |
7086 | } |
7087 | ||
7088 | eif.info = info; | |
0a1b45a2 | 7089 | eif.failed = false; |
902e9fc7 MR |
7090 | |
7091 | /* Find all symbols which were defined in a dynamic object and make | |
7092 | the backend pick a reasonable value for them. */ | |
7093 | elf_link_hash_traverse (elf_hash_table (info), | |
7094 | _bfd_elf_adjust_dynamic_symbol, | |
7095 | &eif); | |
7096 | if (eif.failed) | |
0a1b45a2 | 7097 | return false; |
902e9fc7 MR |
7098 | |
7099 | /* Add some entries to the .dynamic section. We fill in some of the | |
7100 | values later, in bfd_elf_final_link, but we must add the entries | |
7101 | now so that we know the final size of the .dynamic section. */ | |
7102 | ||
7103 | /* If there are initialization and/or finalization functions to | |
7104 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
7105 | h = (info->init_function | |
7106 | ? elf_link_hash_lookup (elf_hash_table (info), | |
0a1b45a2 AM |
7107 | info->init_function, false, |
7108 | false, false) | |
902e9fc7 MR |
7109 | : NULL); |
7110 | if (h != NULL | |
7111 | && (h->ref_regular | |
7112 | || h->def_regular)) | |
7113 | { | |
7114 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT, 0)) | |
0a1b45a2 | 7115 | return false; |
902e9fc7 MR |
7116 | } |
7117 | h = (info->fini_function | |
7118 | ? elf_link_hash_lookup (elf_hash_table (info), | |
0a1b45a2 AM |
7119 | info->fini_function, false, |
7120 | false, false) | |
902e9fc7 MR |
7121 | : NULL); |
7122 | if (h != NULL | |
7123 | && (h->ref_regular | |
7124 | || h->def_regular)) | |
7125 | { | |
7126 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI, 0)) | |
0a1b45a2 | 7127 | return false; |
902e9fc7 MR |
7128 | } |
7129 | ||
7130 | s = bfd_get_section_by_name (output_bfd, ".preinit_array"); | |
7131 | if (s != NULL && s->linker_has_input) | |
7132 | { | |
7133 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
7134 | if (! bfd_link_executable (info)) | |
7135 | { | |
7136 | bfd *sub; | |
7137 | asection *o; | |
7138 | ||
57963c05 AM |
7139 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
7140 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour | |
7141 | && (o = sub->sections) != NULL | |
7142 | && o->sec_info_type != SEC_INFO_TYPE_JUST_SYMS) | |
902e9fc7 MR |
7143 | for (o = sub->sections; o != NULL; o = o->next) |
7144 | if (elf_section_data (o)->this_hdr.sh_type | |
7145 | == SHT_PREINIT_ARRAY) | |
7146 | { | |
7147 | _bfd_error_handler | |
871b3ab2 | 7148 | (_("%pB: .preinit_array section is not allowed in DSO"), |
902e9fc7 MR |
7149 | sub); |
7150 | break; | |
7151 | } | |
7152 | ||
7153 | bfd_set_error (bfd_error_nonrepresentable_section); | |
0a1b45a2 | 7154 | return false; |
902e9fc7 MR |
7155 | } |
7156 | ||
7157 | if (!_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAY, 0) | |
7158 | || !_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAYSZ, 0)) | |
0a1b45a2 | 7159 | return false; |
902e9fc7 MR |
7160 | } |
7161 | s = bfd_get_section_by_name (output_bfd, ".init_array"); | |
7162 | if (s != NULL && s->linker_has_input) | |
7163 | { | |
7164 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAY, 0) | |
7165 | || !_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAYSZ, 0)) | |
0a1b45a2 | 7166 | return false; |
902e9fc7 MR |
7167 | } |
7168 | s = bfd_get_section_by_name (output_bfd, ".fini_array"); | |
7169 | if (s != NULL && s->linker_has_input) | |
7170 | { | |
7171 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAY, 0) | |
7172 | || !_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAYSZ, 0)) | |
0a1b45a2 | 7173 | return false; |
902e9fc7 MR |
7174 | } |
7175 | ||
7176 | dynstr = bfd_get_linker_section (dynobj, ".dynstr"); | |
7177 | /* If .dynstr is excluded from the link, we don't want any of | |
7178 | these tags. Strictly, we should be checking each section | |
7179 | individually; This quick check covers for the case where | |
7180 | someone does a /DISCARD/ : { *(*) }. */ | |
7181 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
7182 | { | |
7183 | bfd_size_type strsize; | |
7184 | ||
7185 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
7186 | if ((info->emit_hash | |
7187 | && !_bfd_elf_add_dynamic_entry (info, DT_HASH, 0)) | |
7188 | || (info->emit_gnu_hash | |
f16a9783 MS |
7189 | && (bed->record_xhash_symbol == NULL |
7190 | && !_bfd_elf_add_dynamic_entry (info, DT_GNU_HASH, 0))) | |
902e9fc7 MR |
7191 | || !_bfd_elf_add_dynamic_entry (info, DT_STRTAB, 0) |
7192 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
7193 | || !_bfd_elf_add_dynamic_entry (info, DT_STRSZ, strsize) | |
7194 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMENT, | |
6a0a0dd0 VDM |
7195 | bed->s->sizeof_sym) |
7196 | || (info->gnu_flags_1 | |
7197 | && !_bfd_elf_add_dynamic_entry (info, DT_GNU_FLAGS_1, | |
7198 | info->gnu_flags_1))) | |
0a1b45a2 | 7199 | return false; |
902e9fc7 MR |
7200 | } |
7201 | } | |
7202 | ||
7203 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) | |
0a1b45a2 | 7204 | return false; |
902e9fc7 MR |
7205 | |
7206 | /* The backend must work out the sizes of all the other dynamic | |
7207 | sections. */ | |
7208 | if (dynobj != NULL | |
7209 | && bed->elf_backend_size_dynamic_sections != NULL | |
7210 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
0a1b45a2 | 7211 | return false; |
902e9fc7 MR |
7212 | |
7213 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) | |
7214 | { | |
902e9fc7 MR |
7215 | if (elf_tdata (output_bfd)->cverdefs) |
7216 | { | |
7217 | unsigned int crefs = elf_tdata (output_bfd)->cverdefs; | |
7218 | ||
7219 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERDEF, 0) | |
7220 | || !_bfd_elf_add_dynamic_entry (info, DT_VERDEFNUM, crefs)) | |
0a1b45a2 | 7221 | return false; |
902e9fc7 MR |
7222 | } |
7223 | ||
7224 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) | |
7225 | { | |
7226 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS, info->flags)) | |
0a1b45a2 | 7227 | return false; |
902e9fc7 MR |
7228 | } |
7229 | else if (info->flags & DF_BIND_NOW) | |
7230 | { | |
7231 | if (!_bfd_elf_add_dynamic_entry (info, DT_BIND_NOW, 0)) | |
0a1b45a2 | 7232 | return false; |
902e9fc7 MR |
7233 | } |
7234 | ||
7235 | if (info->flags_1) | |
7236 | { | |
7237 | if (bfd_link_executable (info)) | |
7238 | info->flags_1 &= ~ (DF_1_INITFIRST | |
7239 | | DF_1_NODELETE | |
7240 | | DF_1_NOOPEN); | |
7241 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS_1, info->flags_1)) | |
0a1b45a2 | 7242 | return false; |
902e9fc7 MR |
7243 | } |
7244 | ||
7245 | if (elf_tdata (output_bfd)->cverrefs) | |
7246 | { | |
7247 | unsigned int crefs = elf_tdata (output_bfd)->cverrefs; | |
7248 | ||
7249 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERNEED, 0) | |
7250 | || !_bfd_elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs)) | |
0a1b45a2 | 7251 | return false; |
902e9fc7 | 7252 | } |
5a580b3a | 7253 | |
8423293d AM |
7254 | if ((elf_tdata (output_bfd)->cverrefs == 0 |
7255 | && elf_tdata (output_bfd)->cverdefs == 0) | |
63f452a8 | 7256 | || _bfd_elf_link_renumber_dynsyms (output_bfd, info, NULL) <= 1) |
8423293d | 7257 | { |
902e9fc7 MR |
7258 | asection *s; |
7259 | ||
3d4d4302 | 7260 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
8423293d AM |
7261 | s->flags |= SEC_EXCLUDE; |
7262 | } | |
7263 | } | |
0a1b45a2 | 7264 | return true; |
8423293d AM |
7265 | } |
7266 | ||
74541ad4 AM |
7267 | /* Find the first non-excluded output section. We'll use its |
7268 | section symbol for some emitted relocs. */ | |
7269 | void | |
7270 | _bfd_elf_init_1_index_section (bfd *output_bfd, struct bfd_link_info *info) | |
7271 | { | |
7272 | asection *s; | |
f26a3287 | 7273 | asection *found = NULL; |
74541ad4 AM |
7274 | |
7275 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
7276 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC | |
d00dd7dc | 7277 | && !_bfd_elf_omit_section_dynsym_default (output_bfd, info, s)) |
74541ad4 | 7278 | { |
f26a3287 AM |
7279 | found = s; |
7280 | if ((s->flags & SEC_THREAD_LOCAL) == 0) | |
7281 | break; | |
74541ad4 | 7282 | } |
f26a3287 | 7283 | elf_hash_table (info)->text_index_section = found; |
74541ad4 AM |
7284 | } |
7285 | ||
7286 | /* Find two non-excluded output sections, one for code, one for data. | |
7287 | We'll use their section symbols for some emitted relocs. */ | |
7288 | void | |
7289 | _bfd_elf_init_2_index_sections (bfd *output_bfd, struct bfd_link_info *info) | |
7290 | { | |
7291 | asection *s; | |
f26a3287 | 7292 | asection *found = NULL; |
74541ad4 | 7293 | |
266b05cf | 7294 | /* Data first, since setting text_index_section changes |
7f923b7f | 7295 | _bfd_elf_omit_section_dynsym_default. */ |
74541ad4 | 7296 | for (s = output_bfd->sections; s != NULL; s = s->next) |
f26a3287 AM |
7297 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC |
7298 | && !(s->flags & SEC_READONLY) | |
d00dd7dc | 7299 | && !_bfd_elf_omit_section_dynsym_default (output_bfd, info, s)) |
74541ad4 | 7300 | { |
f26a3287 AM |
7301 | found = s; |
7302 | if ((s->flags & SEC_THREAD_LOCAL) == 0) | |
7303 | break; | |
74541ad4 | 7304 | } |
f26a3287 | 7305 | elf_hash_table (info)->data_index_section = found; |
74541ad4 AM |
7306 | |
7307 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
f26a3287 AM |
7308 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC |
7309 | && (s->flags & SEC_READONLY) | |
d00dd7dc | 7310 | && !_bfd_elf_omit_section_dynsym_default (output_bfd, info, s)) |
74541ad4 | 7311 | { |
f26a3287 | 7312 | found = s; |
74541ad4 AM |
7313 | break; |
7314 | } | |
f26a3287 | 7315 | elf_hash_table (info)->text_index_section = found; |
74541ad4 AM |
7316 | } |
7317 | ||
f16a9783 MS |
7318 | #define GNU_HASH_SECTION_NAME(bed) \ |
7319 | (bed)->record_xhash_symbol != NULL ? ".MIPS.xhash" : ".gnu.hash" | |
7320 | ||
0a1b45a2 | 7321 | bool |
8423293d AM |
7322 | bfd_elf_size_dynsym_hash_dynstr (bfd *output_bfd, struct bfd_link_info *info) |
7323 | { | |
74541ad4 | 7324 | const struct elf_backend_data *bed; |
23ec1e32 | 7325 | unsigned long section_sym_count; |
96d01d93 | 7326 | bfd_size_type dynsymcount = 0; |
74541ad4 | 7327 | |
8423293d | 7328 | if (!is_elf_hash_table (info->hash)) |
0a1b45a2 | 7329 | return true; |
8423293d | 7330 | |
74541ad4 AM |
7331 | bed = get_elf_backend_data (output_bfd); |
7332 | (*bed->elf_backend_init_index_section) (output_bfd, info); | |
7333 | ||
23ec1e32 MR |
7334 | /* Assign dynsym indices. In a shared library we generate a section |
7335 | symbol for each output section, which come first. Next come all | |
7336 | of the back-end allocated local dynamic syms, followed by the rest | |
7337 | of the global symbols. | |
7338 | ||
7339 | This is usually not needed for static binaries, however backends | |
7340 | can request to always do it, e.g. the MIPS backend uses dynamic | |
7341 | symbol counts to lay out GOT, which will be produced in the | |
7342 | presence of GOT relocations even in static binaries (holding fixed | |
7343 | data in that case, to satisfy those relocations). */ | |
7344 | ||
7345 | if (elf_hash_table (info)->dynamic_sections_created | |
7346 | || bed->always_renumber_dynsyms) | |
7347 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info, | |
7348 | §ion_sym_count); | |
7349 | ||
8423293d AM |
7350 | if (elf_hash_table (info)->dynamic_sections_created) |
7351 | { | |
7352 | bfd *dynobj; | |
8423293d | 7353 | asection *s; |
8423293d AM |
7354 | unsigned int dtagcount; |
7355 | ||
7356 | dynobj = elf_hash_table (info)->dynobj; | |
7357 | ||
5a580b3a | 7358 | /* Work out the size of the symbol version section. */ |
3d4d4302 | 7359 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
5a580b3a | 7360 | BFD_ASSERT (s != NULL); |
d5486c43 | 7361 | if ((s->flags & SEC_EXCLUDE) == 0) |
5a580b3a | 7362 | { |
eea6121a | 7363 | s->size = dynsymcount * sizeof (Elf_External_Versym); |
a50b1753 | 7364 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
5a580b3a | 7365 | if (s->contents == NULL) |
0a1b45a2 | 7366 | return false; |
5a580b3a AM |
7367 | |
7368 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERSYM, 0)) | |
0a1b45a2 | 7369 | return false; |
5a580b3a AM |
7370 | } |
7371 | ||
7372 | /* Set the size of the .dynsym and .hash sections. We counted | |
7373 | the number of dynamic symbols in elf_link_add_object_symbols. | |
7374 | We will build the contents of .dynsym and .hash when we build | |
7375 | the final symbol table, because until then we do not know the | |
7376 | correct value to give the symbols. We built the .dynstr | |
7377 | section as we went along in elf_link_add_object_symbols. */ | |
cae1fbbb | 7378 | s = elf_hash_table (info)->dynsym; |
5a580b3a | 7379 | BFD_ASSERT (s != NULL); |
eea6121a | 7380 | s->size = dynsymcount * bed->s->sizeof_sym; |
5a580b3a | 7381 | |
d5486c43 L |
7382 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
7383 | if (s->contents == NULL) | |
0a1b45a2 | 7384 | return false; |
5a580b3a | 7385 | |
d5486c43 L |
7386 | /* The first entry in .dynsym is a dummy symbol. Clear all the |
7387 | section syms, in case we don't output them all. */ | |
7388 | ++section_sym_count; | |
7389 | memset (s->contents, 0, section_sym_count * bed->s->sizeof_sym); | |
5a580b3a | 7390 | |
fdc90cb4 JJ |
7391 | elf_hash_table (info)->bucketcount = 0; |
7392 | ||
5a580b3a AM |
7393 | /* Compute the size of the hashing table. As a side effect this |
7394 | computes the hash values for all the names we export. */ | |
fdc90cb4 JJ |
7395 | if (info->emit_hash) |
7396 | { | |
7397 | unsigned long int *hashcodes; | |
14b1c01e | 7398 | struct hash_codes_info hashinf; |
fdc90cb4 JJ |
7399 | bfd_size_type amt; |
7400 | unsigned long int nsyms; | |
7401 | size_t bucketcount; | |
7402 | size_t hash_entry_size; | |
7403 | ||
7404 | /* Compute the hash values for all exported symbols. At the same | |
7405 | time store the values in an array so that we could use them for | |
7406 | optimizations. */ | |
7407 | amt = dynsymcount * sizeof (unsigned long int); | |
a50b1753 | 7408 | hashcodes = (unsigned long int *) bfd_malloc (amt); |
fdc90cb4 | 7409 | if (hashcodes == NULL) |
0a1b45a2 | 7410 | return false; |
14b1c01e | 7411 | hashinf.hashcodes = hashcodes; |
0a1b45a2 | 7412 | hashinf.error = false; |
5a580b3a | 7413 | |
fdc90cb4 JJ |
7414 | /* Put all hash values in HASHCODES. */ |
7415 | elf_link_hash_traverse (elf_hash_table (info), | |
14b1c01e AM |
7416 | elf_collect_hash_codes, &hashinf); |
7417 | if (hashinf.error) | |
4dd07732 AM |
7418 | { |
7419 | free (hashcodes); | |
0a1b45a2 | 7420 | return false; |
4dd07732 | 7421 | } |
5a580b3a | 7422 | |
14b1c01e | 7423 | nsyms = hashinf.hashcodes - hashcodes; |
fdc90cb4 JJ |
7424 | bucketcount |
7425 | = compute_bucket_count (info, hashcodes, nsyms, 0); | |
7426 | free (hashcodes); | |
7427 | ||
4b48e2f6 | 7428 | if (bucketcount == 0 && nsyms > 0) |
0a1b45a2 | 7429 | return false; |
5a580b3a | 7430 | |
fdc90cb4 JJ |
7431 | elf_hash_table (info)->bucketcount = bucketcount; |
7432 | ||
3d4d4302 | 7433 | s = bfd_get_linker_section (dynobj, ".hash"); |
fdc90cb4 JJ |
7434 | BFD_ASSERT (s != NULL); |
7435 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; | |
7436 | s->size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
a50b1753 | 7437 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 | 7438 | if (s->contents == NULL) |
0a1b45a2 | 7439 | return false; |
fdc90cb4 JJ |
7440 | |
7441 | bfd_put (8 * hash_entry_size, output_bfd, bucketcount, s->contents); | |
7442 | bfd_put (8 * hash_entry_size, output_bfd, dynsymcount, | |
7443 | s->contents + hash_entry_size); | |
7444 | } | |
7445 | ||
7446 | if (info->emit_gnu_hash) | |
7447 | { | |
7448 | size_t i, cnt; | |
7449 | unsigned char *contents; | |
7450 | struct collect_gnu_hash_codes cinfo; | |
7451 | bfd_size_type amt; | |
7452 | size_t bucketcount; | |
7453 | ||
7454 | memset (&cinfo, 0, sizeof (cinfo)); | |
7455 | ||
7456 | /* Compute the hash values for all exported symbols. At the same | |
7457 | time store the values in an array so that we could use them for | |
7458 | optimizations. */ | |
7459 | amt = dynsymcount * 2 * sizeof (unsigned long int); | |
a50b1753 | 7460 | cinfo.hashcodes = (long unsigned int *) bfd_malloc (amt); |
fdc90cb4 | 7461 | if (cinfo.hashcodes == NULL) |
0a1b45a2 | 7462 | return false; |
fdc90cb4 JJ |
7463 | |
7464 | cinfo.hashval = cinfo.hashcodes + dynsymcount; | |
7465 | cinfo.min_dynindx = -1; | |
7466 | cinfo.output_bfd = output_bfd; | |
7467 | cinfo.bed = bed; | |
7468 | ||
7469 | /* Put all hash values in HASHCODES. */ | |
7470 | elf_link_hash_traverse (elf_hash_table (info), | |
7471 | elf_collect_gnu_hash_codes, &cinfo); | |
14b1c01e | 7472 | if (cinfo.error) |
4dd07732 AM |
7473 | { |
7474 | free (cinfo.hashcodes); | |
0a1b45a2 | 7475 | return false; |
4dd07732 | 7476 | } |
fdc90cb4 JJ |
7477 | |
7478 | bucketcount | |
7479 | = compute_bucket_count (info, cinfo.hashcodes, cinfo.nsyms, 1); | |
7480 | ||
7481 | if (bucketcount == 0) | |
7482 | { | |
7483 | free (cinfo.hashcodes); | |
0a1b45a2 | 7484 | return false; |
fdc90cb4 JJ |
7485 | } |
7486 | ||
f16a9783 | 7487 | s = bfd_get_linker_section (dynobj, GNU_HASH_SECTION_NAME (bed)); |
fdc90cb4 JJ |
7488 | BFD_ASSERT (s != NULL); |
7489 | ||
7490 | if (cinfo.nsyms == 0) | |
7491 | { | |
f16a9783 | 7492 | /* Empty .gnu.hash or .MIPS.xhash section is special. */ |
fdc90cb4 JJ |
7493 | BFD_ASSERT (cinfo.min_dynindx == -1); |
7494 | free (cinfo.hashcodes); | |
7495 | s->size = 5 * 4 + bed->s->arch_size / 8; | |
a50b1753 | 7496 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 | 7497 | if (contents == NULL) |
0a1b45a2 | 7498 | return false; |
fdc90cb4 JJ |
7499 | s->contents = contents; |
7500 | /* 1 empty bucket. */ | |
7501 | bfd_put_32 (output_bfd, 1, contents); | |
7502 | /* SYMIDX above the special symbol 0. */ | |
7503 | bfd_put_32 (output_bfd, 1, contents + 4); | |
7504 | /* Just one word for bitmask. */ | |
7505 | bfd_put_32 (output_bfd, 1, contents + 8); | |
7506 | /* Only hash fn bloom filter. */ | |
7507 | bfd_put_32 (output_bfd, 0, contents + 12); | |
7508 | /* No hashes are valid - empty bitmask. */ | |
7509 | bfd_put (bed->s->arch_size, output_bfd, 0, contents + 16); | |
7510 | /* No hashes in the only bucket. */ | |
7511 | bfd_put_32 (output_bfd, 0, | |
7512 | contents + 16 + bed->s->arch_size / 8); | |
7513 | } | |
7514 | else | |
7515 | { | |
9e6619e2 | 7516 | unsigned long int maskwords, maskbitslog2, x; |
0b33793d | 7517 | BFD_ASSERT (cinfo.min_dynindx != -1); |
fdc90cb4 | 7518 | |
9e6619e2 AM |
7519 | x = cinfo.nsyms; |
7520 | maskbitslog2 = 1; | |
7521 | while ((x >>= 1) != 0) | |
7522 | ++maskbitslog2; | |
fdc90cb4 JJ |
7523 | if (maskbitslog2 < 3) |
7524 | maskbitslog2 = 5; | |
7525 | else if ((1 << (maskbitslog2 - 2)) & cinfo.nsyms) | |
7526 | maskbitslog2 = maskbitslog2 + 3; | |
7527 | else | |
7528 | maskbitslog2 = maskbitslog2 + 2; | |
7529 | if (bed->s->arch_size == 64) | |
7530 | { | |
7531 | if (maskbitslog2 == 5) | |
7532 | maskbitslog2 = 6; | |
7533 | cinfo.shift1 = 6; | |
7534 | } | |
7535 | else | |
7536 | cinfo.shift1 = 5; | |
7537 | cinfo.mask = (1 << cinfo.shift1) - 1; | |
2ccdbfcc | 7538 | cinfo.shift2 = maskbitslog2; |
fdc90cb4 JJ |
7539 | cinfo.maskbits = 1 << maskbitslog2; |
7540 | maskwords = 1 << (maskbitslog2 - cinfo.shift1); | |
7541 | amt = bucketcount * sizeof (unsigned long int) * 2; | |
7542 | amt += maskwords * sizeof (bfd_vma); | |
a50b1753 | 7543 | cinfo.bitmask = (bfd_vma *) bfd_malloc (amt); |
fdc90cb4 JJ |
7544 | if (cinfo.bitmask == NULL) |
7545 | { | |
7546 | free (cinfo.hashcodes); | |
0a1b45a2 | 7547 | return false; |
fdc90cb4 JJ |
7548 | } |
7549 | ||
a50b1753 | 7550 | cinfo.counts = (long unsigned int *) (cinfo.bitmask + maskwords); |
fdc90cb4 JJ |
7551 | cinfo.indx = cinfo.counts + bucketcount; |
7552 | cinfo.symindx = dynsymcount - cinfo.nsyms; | |
7553 | memset (cinfo.bitmask, 0, maskwords * sizeof (bfd_vma)); | |
7554 | ||
7555 | /* Determine how often each hash bucket is used. */ | |
7556 | memset (cinfo.counts, 0, bucketcount * sizeof (cinfo.counts[0])); | |
7557 | for (i = 0; i < cinfo.nsyms; ++i) | |
7558 | ++cinfo.counts[cinfo.hashcodes[i] % bucketcount]; | |
7559 | ||
7560 | for (i = 0, cnt = cinfo.symindx; i < bucketcount; ++i) | |
7561 | if (cinfo.counts[i] != 0) | |
7562 | { | |
7563 | cinfo.indx[i] = cnt; | |
7564 | cnt += cinfo.counts[i]; | |
7565 | } | |
7566 | BFD_ASSERT (cnt == dynsymcount); | |
7567 | cinfo.bucketcount = bucketcount; | |
7568 | cinfo.local_indx = cinfo.min_dynindx; | |
7569 | ||
7570 | s->size = (4 + bucketcount + cinfo.nsyms) * 4; | |
7571 | s->size += cinfo.maskbits / 8; | |
f16a9783 MS |
7572 | if (bed->record_xhash_symbol != NULL) |
7573 | s->size += cinfo.nsyms * 4; | |
a50b1753 | 7574 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
7575 | if (contents == NULL) |
7576 | { | |
7577 | free (cinfo.bitmask); | |
7578 | free (cinfo.hashcodes); | |
0a1b45a2 | 7579 | return false; |
fdc90cb4 JJ |
7580 | } |
7581 | ||
7582 | s->contents = contents; | |
7583 | bfd_put_32 (output_bfd, bucketcount, contents); | |
7584 | bfd_put_32 (output_bfd, cinfo.symindx, contents + 4); | |
7585 | bfd_put_32 (output_bfd, maskwords, contents + 8); | |
7586 | bfd_put_32 (output_bfd, cinfo.shift2, contents + 12); | |
7587 | contents += 16 + cinfo.maskbits / 8; | |
7588 | ||
7589 | for (i = 0; i < bucketcount; ++i) | |
7590 | { | |
7591 | if (cinfo.counts[i] == 0) | |
7592 | bfd_put_32 (output_bfd, 0, contents); | |
7593 | else | |
7594 | bfd_put_32 (output_bfd, cinfo.indx[i], contents); | |
7595 | contents += 4; | |
7596 | } | |
7597 | ||
7598 | cinfo.contents = contents; | |
7599 | ||
f16a9783 MS |
7600 | cinfo.xlat = contents + cinfo.nsyms * 4 - s->contents; |
7601 | /* Renumber dynamic symbols, if populating .gnu.hash section. | |
7602 | If using .MIPS.xhash, populate the translation table. */ | |
fdc90cb4 | 7603 | elf_link_hash_traverse (elf_hash_table (info), |
f16a9783 | 7604 | elf_gnu_hash_process_symidx, &cinfo); |
fdc90cb4 JJ |
7605 | |
7606 | contents = s->contents + 16; | |
7607 | for (i = 0; i < maskwords; ++i) | |
7608 | { | |
7609 | bfd_put (bed->s->arch_size, output_bfd, cinfo.bitmask[i], | |
7610 | contents); | |
7611 | contents += bed->s->arch_size / 8; | |
7612 | } | |
7613 | ||
7614 | free (cinfo.bitmask); | |
7615 | free (cinfo.hashcodes); | |
7616 | } | |
7617 | } | |
5a580b3a | 7618 | |
3d4d4302 | 7619 | s = bfd_get_linker_section (dynobj, ".dynstr"); |
5a580b3a AM |
7620 | BFD_ASSERT (s != NULL); |
7621 | ||
4ad4eba5 | 7622 | elf_finalize_dynstr (output_bfd, info); |
5a580b3a | 7623 | |
eea6121a | 7624 | s->size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
5a580b3a AM |
7625 | |
7626 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) | |
7627 | if (!_bfd_elf_add_dynamic_entry (info, DT_NULL, 0)) | |
0a1b45a2 | 7628 | return false; |
5a580b3a AM |
7629 | } |
7630 | ||
0a1b45a2 | 7631 | return true; |
5a580b3a | 7632 | } |
4d269e42 | 7633 | \f |
4d269e42 AM |
7634 | /* Make sure sec_info_type is cleared if sec_info is cleared too. */ |
7635 | ||
7636 | static void | |
7637 | merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED, | |
7638 | asection *sec) | |
7639 | { | |
dbaa2011 AM |
7640 | BFD_ASSERT (sec->sec_info_type == SEC_INFO_TYPE_MERGE); |
7641 | sec->sec_info_type = SEC_INFO_TYPE_NONE; | |
4d269e42 AM |
7642 | } |
7643 | ||
7644 | /* Finish SHF_MERGE section merging. */ | |
7645 | ||
0a1b45a2 | 7646 | bool |
630993ec | 7647 | _bfd_elf_merge_sections (bfd *obfd, struct bfd_link_info *info) |
4d269e42 AM |
7648 | { |
7649 | bfd *ibfd; | |
7650 | asection *sec; | |
7651 | ||
7652 | if (!is_elf_hash_table (info->hash)) | |
0a1b45a2 | 7653 | return false; |
4d269e42 | 7654 | |
c72f2fb2 | 7655 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
630993ec AM |
7656 | if ((ibfd->flags & DYNAMIC) == 0 |
7657 | && bfd_get_flavour (ibfd) == bfd_target_elf_flavour | |
017e6bce AM |
7658 | && (elf_elfheader (ibfd)->e_ident[EI_CLASS] |
7659 | == get_elf_backend_data (obfd)->s->elfclass)) | |
4d269e42 AM |
7660 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
7661 | if ((sec->flags & SEC_MERGE) != 0 | |
7662 | && !bfd_is_abs_section (sec->output_section)) | |
7663 | { | |
7664 | struct bfd_elf_section_data *secdata; | |
7665 | ||
7666 | secdata = elf_section_data (sec); | |
630993ec | 7667 | if (! _bfd_add_merge_section (obfd, |
4d269e42 AM |
7668 | &elf_hash_table (info)->merge_info, |
7669 | sec, &secdata->sec_info)) | |
0a1b45a2 | 7670 | return false; |
4d269e42 | 7671 | else if (secdata->sec_info) |
dbaa2011 | 7672 | sec->sec_info_type = SEC_INFO_TYPE_MERGE; |
4d269e42 AM |
7673 | } |
7674 | ||
7675 | if (elf_hash_table (info)->merge_info != NULL) | |
630993ec | 7676 | _bfd_merge_sections (obfd, info, elf_hash_table (info)->merge_info, |
4d269e42 | 7677 | merge_sections_remove_hook); |
0a1b45a2 | 7678 | return true; |
4d269e42 AM |
7679 | } |
7680 | ||
7681 | /* Create an entry in an ELF linker hash table. */ | |
7682 | ||
7683 | struct bfd_hash_entry * | |
7684 | _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry, | |
7685 | struct bfd_hash_table *table, | |
7686 | const char *string) | |
7687 | { | |
7688 | /* Allocate the structure if it has not already been allocated by a | |
7689 | subclass. */ | |
7690 | if (entry == NULL) | |
7691 | { | |
a50b1753 | 7692 | entry = (struct bfd_hash_entry *) |
ca4be51c | 7693 | bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)); |
4d269e42 AM |
7694 | if (entry == NULL) |
7695 | return entry; | |
7696 | } | |
7697 | ||
7698 | /* Call the allocation method of the superclass. */ | |
7699 | entry = _bfd_link_hash_newfunc (entry, table, string); | |
7700 | if (entry != NULL) | |
7701 | { | |
7702 | struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; | |
7703 | struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table; | |
7704 | ||
7705 | /* Set local fields. */ | |
7706 | ret->indx = -1; | |
7707 | ret->dynindx = -1; | |
7708 | ret->got = htab->init_got_refcount; | |
7709 | ret->plt = htab->init_plt_refcount; | |
7710 | memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry) | |
7711 | - offsetof (struct elf_link_hash_entry, size))); | |
7712 | /* Assume that we have been called by a non-ELF symbol reader. | |
7713 | This flag is then reset by the code which reads an ELF input | |
7714 | file. This ensures that a symbol created by a non-ELF symbol | |
7715 | reader will have the flag set correctly. */ | |
7716 | ret->non_elf = 1; | |
7717 | } | |
7718 | ||
7719 | return entry; | |
7720 | } | |
7721 | ||
7722 | /* Copy data from an indirect symbol to its direct symbol, hiding the | |
7723 | old indirect symbol. Also used for copying flags to a weakdef. */ | |
7724 | ||
7725 | void | |
7726 | _bfd_elf_link_hash_copy_indirect (struct bfd_link_info *info, | |
7727 | struct elf_link_hash_entry *dir, | |
7728 | struct elf_link_hash_entry *ind) | |
7729 | { | |
7730 | struct elf_link_hash_table *htab; | |
7731 | ||
ad172eaa L |
7732 | if (ind->dyn_relocs != NULL) |
7733 | { | |
7734 | if (dir->dyn_relocs != NULL) | |
7735 | { | |
7736 | struct elf_dyn_relocs **pp; | |
7737 | struct elf_dyn_relocs *p; | |
7738 | ||
7739 | /* Add reloc counts against the indirect sym to the direct sym | |
7740 | list. Merge any entries against the same section. */ | |
7741 | for (pp = &ind->dyn_relocs; (p = *pp) != NULL; ) | |
7742 | { | |
7743 | struct elf_dyn_relocs *q; | |
7744 | ||
7745 | for (q = dir->dyn_relocs; q != NULL; q = q->next) | |
7746 | if (q->sec == p->sec) | |
7747 | { | |
7748 | q->pc_count += p->pc_count; | |
7749 | q->count += p->count; | |
7750 | *pp = p->next; | |
7751 | break; | |
7752 | } | |
7753 | if (q == NULL) | |
7754 | pp = &p->next; | |
7755 | } | |
7756 | *pp = dir->dyn_relocs; | |
7757 | } | |
7758 | ||
7759 | dir->dyn_relocs = ind->dyn_relocs; | |
7760 | ind->dyn_relocs = NULL; | |
7761 | } | |
7762 | ||
4d269e42 | 7763 | /* Copy down any references that we may have already seen to the |
e81830c5 | 7764 | symbol which just became indirect. */ |
4d269e42 | 7765 | |
422f1182 | 7766 | if (dir->versioned != versioned_hidden) |
e81830c5 AM |
7767 | dir->ref_dynamic |= ind->ref_dynamic; |
7768 | dir->ref_regular |= ind->ref_regular; | |
7769 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
7770 | dir->non_got_ref |= ind->non_got_ref; | |
7771 | dir->needs_plt |= ind->needs_plt; | |
7772 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
4d269e42 AM |
7773 | |
7774 | if (ind->root.type != bfd_link_hash_indirect) | |
7775 | return; | |
7776 | ||
7777 | /* Copy over the global and procedure linkage table refcount entries. | |
7778 | These may have been already set up by a check_relocs routine. */ | |
7779 | htab = elf_hash_table (info); | |
7780 | if (ind->got.refcount > htab->init_got_refcount.refcount) | |
7781 | { | |
7782 | if (dir->got.refcount < 0) | |
7783 | dir->got.refcount = 0; | |
7784 | dir->got.refcount += ind->got.refcount; | |
7785 | ind->got.refcount = htab->init_got_refcount.refcount; | |
7786 | } | |
7787 | ||
7788 | if (ind->plt.refcount > htab->init_plt_refcount.refcount) | |
7789 | { | |
7790 | if (dir->plt.refcount < 0) | |
7791 | dir->plt.refcount = 0; | |
7792 | dir->plt.refcount += ind->plt.refcount; | |
7793 | ind->plt.refcount = htab->init_plt_refcount.refcount; | |
7794 | } | |
7795 | ||
7796 | if (ind->dynindx != -1) | |
7797 | { | |
7798 | if (dir->dynindx != -1) | |
7799 | _bfd_elf_strtab_delref (htab->dynstr, dir->dynstr_index); | |
7800 | dir->dynindx = ind->dynindx; | |
7801 | dir->dynstr_index = ind->dynstr_index; | |
7802 | ind->dynindx = -1; | |
7803 | ind->dynstr_index = 0; | |
7804 | } | |
7805 | } | |
7806 | ||
7807 | void | |
7808 | _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info, | |
7809 | struct elf_link_hash_entry *h, | |
0a1b45a2 | 7810 | bool force_local) |
4d269e42 | 7811 | { |
3aa14d16 L |
7812 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
7813 | if (h->type != STT_GNU_IFUNC) | |
7814 | { | |
7815 | h->plt = elf_hash_table (info)->init_plt_offset; | |
7816 | h->needs_plt = 0; | |
7817 | } | |
4d269e42 AM |
7818 | if (force_local) |
7819 | { | |
7820 | h->forced_local = 1; | |
7821 | if (h->dynindx != -1) | |
7822 | { | |
4d269e42 AM |
7823 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
7824 | h->dynstr_index); | |
641338d8 AM |
7825 | h->dynindx = -1; |
7826 | h->dynstr_index = 0; | |
4d269e42 AM |
7827 | } |
7828 | } | |
7829 | } | |
7830 | ||
34a87bb0 L |
7831 | /* Hide a symbol. */ |
7832 | ||
7833 | void | |
7834 | _bfd_elf_link_hide_symbol (bfd *output_bfd, | |
7835 | struct bfd_link_info *info, | |
7836 | struct bfd_link_hash_entry *h) | |
7837 | { | |
7838 | if (is_elf_hash_table (info->hash)) | |
7839 | { | |
7840 | const struct elf_backend_data *bed | |
7841 | = get_elf_backend_data (output_bfd); | |
7842 | struct elf_link_hash_entry *eh | |
7843 | = (struct elf_link_hash_entry *) h; | |
0a1b45a2 | 7844 | bed->elf_backend_hide_symbol (info, eh, true); |
34a87bb0 L |
7845 | eh->def_dynamic = 0; |
7846 | eh->ref_dynamic = 0; | |
7847 | eh->dynamic_def = 0; | |
7848 | } | |
7849 | } | |
7850 | ||
7bf52ea2 AM |
7851 | /* Initialize an ELF linker hash table. *TABLE has been zeroed by our |
7852 | caller. */ | |
4d269e42 | 7853 | |
0a1b45a2 | 7854 | bool |
4d269e42 AM |
7855 | _bfd_elf_link_hash_table_init |
7856 | (struct elf_link_hash_table *table, | |
7857 | bfd *abfd, | |
7858 | struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *, | |
7859 | struct bfd_hash_table *, | |
7860 | const char *), | |
4dfe6ac6 NC |
7861 | unsigned int entsize, |
7862 | enum elf_target_id target_id) | |
4d269e42 | 7863 | { |
0a1b45a2 | 7864 | bool ret; |
4d269e42 AM |
7865 | int can_refcount = get_elf_backend_data (abfd)->can_refcount; |
7866 | ||
4d269e42 AM |
7867 | table->init_got_refcount.refcount = can_refcount - 1; |
7868 | table->init_plt_refcount.refcount = can_refcount - 1; | |
7869 | table->init_got_offset.offset = -(bfd_vma) 1; | |
7870 | table->init_plt_offset.offset = -(bfd_vma) 1; | |
7871 | /* The first dynamic symbol is a dummy. */ | |
7872 | table->dynsymcount = 1; | |
7873 | ||
7874 | ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); | |
4dfe6ac6 | 7875 | |
4d269e42 | 7876 | table->root.type = bfd_link_elf_hash_table; |
4dfe6ac6 | 7877 | table->hash_table_id = target_id; |
90c14f0c | 7878 | table->target_os = get_elf_backend_data (abfd)->target_os; |
4d269e42 AM |
7879 | |
7880 | return ret; | |
7881 | } | |
7882 | ||
7883 | /* Create an ELF linker hash table. */ | |
7884 | ||
7885 | struct bfd_link_hash_table * | |
7886 | _bfd_elf_link_hash_table_create (bfd *abfd) | |
7887 | { | |
7888 | struct elf_link_hash_table *ret; | |
986f0783 | 7889 | size_t amt = sizeof (struct elf_link_hash_table); |
4d269e42 | 7890 | |
7bf52ea2 | 7891 | ret = (struct elf_link_hash_table *) bfd_zmalloc (amt); |
4d269e42 AM |
7892 | if (ret == NULL) |
7893 | return NULL; | |
7894 | ||
7895 | if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc, | |
4dfe6ac6 NC |
7896 | sizeof (struct elf_link_hash_entry), |
7897 | GENERIC_ELF_DATA)) | |
4d269e42 AM |
7898 | { |
7899 | free (ret); | |
7900 | return NULL; | |
7901 | } | |
d495ab0d | 7902 | ret->root.hash_table_free = _bfd_elf_link_hash_table_free; |
4d269e42 AM |
7903 | |
7904 | return &ret->root; | |
7905 | } | |
7906 | ||
9f7c3e5e AM |
7907 | /* Destroy an ELF linker hash table. */ |
7908 | ||
7909 | void | |
d495ab0d | 7910 | _bfd_elf_link_hash_table_free (bfd *obfd) |
9f7c3e5e | 7911 | { |
d495ab0d AM |
7912 | struct elf_link_hash_table *htab; |
7913 | ||
7914 | htab = (struct elf_link_hash_table *) obfd->link.hash; | |
9f7c3e5e AM |
7915 | if (htab->dynstr != NULL) |
7916 | _bfd_elf_strtab_free (htab->dynstr); | |
7917 | _bfd_merge_sections_free (htab->merge_info); | |
d495ab0d | 7918 | _bfd_generic_link_hash_table_free (obfd); |
9f7c3e5e AM |
7919 | } |
7920 | ||
4d269e42 AM |
7921 | /* This is a hook for the ELF emulation code in the generic linker to |
7922 | tell the backend linker what file name to use for the DT_NEEDED | |
7923 | entry for a dynamic object. */ | |
7924 | ||
7925 | void | |
7926 | bfd_elf_set_dt_needed_name (bfd *abfd, const char *name) | |
7927 | { | |
7928 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7929 | && bfd_get_format (abfd) == bfd_object) | |
7930 | elf_dt_name (abfd) = name; | |
7931 | } | |
7932 | ||
7933 | int | |
7934 | bfd_elf_get_dyn_lib_class (bfd *abfd) | |
7935 | { | |
7936 | int lib_class; | |
7937 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7938 | && bfd_get_format (abfd) == bfd_object) | |
7939 | lib_class = elf_dyn_lib_class (abfd); | |
7940 | else | |
7941 | lib_class = 0; | |
7942 | return lib_class; | |
7943 | } | |
7944 | ||
7945 | void | |
7946 | bfd_elf_set_dyn_lib_class (bfd *abfd, enum dynamic_lib_link_class lib_class) | |
7947 | { | |
7948 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7949 | && bfd_get_format (abfd) == bfd_object) | |
7950 | elf_dyn_lib_class (abfd) = lib_class; | |
7951 | } | |
7952 | ||
7953 | /* Get the list of DT_NEEDED entries for a link. This is a hook for | |
7954 | the linker ELF emulation code. */ | |
7955 | ||
7956 | struct bfd_link_needed_list * | |
7957 | bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7958 | struct bfd_link_info *info) | |
7959 | { | |
7960 | if (! is_elf_hash_table (info->hash)) | |
7961 | return NULL; | |
7962 | return elf_hash_table (info)->needed; | |
7963 | } | |
7964 | ||
7965 | /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a | |
7966 | hook for the linker ELF emulation code. */ | |
7967 | ||
7968 | struct bfd_link_needed_list * | |
7969 | bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7970 | struct bfd_link_info *info) | |
7971 | { | |
7972 | if (! is_elf_hash_table (info->hash)) | |
7973 | return NULL; | |
7974 | return elf_hash_table (info)->runpath; | |
7975 | } | |
7976 | ||
7977 | /* Get the name actually used for a dynamic object for a link. This | |
7978 | is the SONAME entry if there is one. Otherwise, it is the string | |
7979 | passed to bfd_elf_set_dt_needed_name, or it is the filename. */ | |
7980 | ||
7981 | const char * | |
7982 | bfd_elf_get_dt_soname (bfd *abfd) | |
7983 | { | |
7984 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7985 | && bfd_get_format (abfd) == bfd_object) | |
7986 | return elf_dt_name (abfd); | |
7987 | return NULL; | |
7988 | } | |
7989 | ||
7990 | /* Get the list of DT_NEEDED entries from a BFD. This is a hook for | |
7991 | the ELF linker emulation code. */ | |
7992 | ||
0a1b45a2 | 7993 | bool |
4d269e42 AM |
7994 | bfd_elf_get_bfd_needed_list (bfd *abfd, |
7995 | struct bfd_link_needed_list **pneeded) | |
7996 | { | |
7997 | asection *s; | |
7998 | bfd_byte *dynbuf = NULL; | |
cb33740c | 7999 | unsigned int elfsec; |
4d269e42 AM |
8000 | unsigned long shlink; |
8001 | bfd_byte *extdyn, *extdynend; | |
8002 | size_t extdynsize; | |
8003 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
8004 | ||
8005 | *pneeded = NULL; | |
8006 | ||
8007 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour | |
8008 | || bfd_get_format (abfd) != bfd_object) | |
0a1b45a2 | 8009 | return true; |
4d269e42 AM |
8010 | |
8011 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
8012 | if (s == NULL || s->size == 0) | |
0a1b45a2 | 8013 | return true; |
4d269e42 AM |
8014 | |
8015 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) | |
8016 | goto error_return; | |
8017 | ||
8018 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 8019 | if (elfsec == SHN_BAD) |
4d269e42 AM |
8020 | goto error_return; |
8021 | ||
8022 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
c152c796 | 8023 | |
4d269e42 AM |
8024 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
8025 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
8026 | ||
8027 | extdyn = dynbuf; | |
8028 | extdynend = extdyn + s->size; | |
8029 | for (; extdyn < extdynend; extdyn += extdynsize) | |
8030 | { | |
8031 | Elf_Internal_Dyn dyn; | |
8032 | ||
8033 | (*swap_dyn_in) (abfd, extdyn, &dyn); | |
8034 | ||
8035 | if (dyn.d_tag == DT_NULL) | |
8036 | break; | |
8037 | ||
8038 | if (dyn.d_tag == DT_NEEDED) | |
8039 | { | |
8040 | const char *string; | |
8041 | struct bfd_link_needed_list *l; | |
8042 | unsigned int tagv = dyn.d_un.d_val; | |
986f0783 | 8043 | size_t amt; |
4d269e42 AM |
8044 | |
8045 | string = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
8046 | if (string == NULL) | |
8047 | goto error_return; | |
8048 | ||
8049 | amt = sizeof *l; | |
a50b1753 | 8050 | l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4d269e42 AM |
8051 | if (l == NULL) |
8052 | goto error_return; | |
8053 | ||
8054 | l->by = abfd; | |
8055 | l->name = string; | |
8056 | l->next = *pneeded; | |
8057 | *pneeded = l; | |
8058 | } | |
8059 | } | |
8060 | ||
8061 | free (dynbuf); | |
8062 | ||
0a1b45a2 | 8063 | return true; |
4d269e42 AM |
8064 | |
8065 | error_return: | |
c9594989 | 8066 | free (dynbuf); |
0a1b45a2 | 8067 | return false; |
4d269e42 AM |
8068 | } |
8069 | ||
8070 | struct elf_symbuf_symbol | |
8071 | { | |
8072 | unsigned long st_name; /* Symbol name, index in string tbl */ | |
8073 | unsigned char st_info; /* Type and binding attributes */ | |
8074 | unsigned char st_other; /* Visibilty, and target specific */ | |
8075 | }; | |
8076 | ||
8077 | struct elf_symbuf_head | |
8078 | { | |
8079 | struct elf_symbuf_symbol *ssym; | |
ef53be89 | 8080 | size_t count; |
4d269e42 AM |
8081 | unsigned int st_shndx; |
8082 | }; | |
8083 | ||
8084 | struct elf_symbol | |
8085 | { | |
8086 | union | |
8087 | { | |
8088 | Elf_Internal_Sym *isym; | |
8089 | struct elf_symbuf_symbol *ssym; | |
dcea6a95 | 8090 | void *p; |
4d269e42 AM |
8091 | } u; |
8092 | const char *name; | |
8093 | }; | |
8094 | ||
8095 | /* Sort references to symbols by ascending section number. */ | |
8096 | ||
8097 | static int | |
8098 | elf_sort_elf_symbol (const void *arg1, const void *arg2) | |
8099 | { | |
8100 | const Elf_Internal_Sym *s1 = *(const Elf_Internal_Sym **) arg1; | |
8101 | const Elf_Internal_Sym *s2 = *(const Elf_Internal_Sym **) arg2; | |
8102 | ||
dcea6a95 AM |
8103 | if (s1->st_shndx != s2->st_shndx) |
8104 | return s1->st_shndx > s2->st_shndx ? 1 : -1; | |
8105 | /* Final sort by the address of the sym in the symbuf ensures | |
8106 | a stable sort. */ | |
8107 | if (s1 != s2) | |
8108 | return s1 > s2 ? 1 : -1; | |
8109 | return 0; | |
4d269e42 AM |
8110 | } |
8111 | ||
8112 | static int | |
8113 | elf_sym_name_compare (const void *arg1, const void *arg2) | |
8114 | { | |
8115 | const struct elf_symbol *s1 = (const struct elf_symbol *) arg1; | |
8116 | const struct elf_symbol *s2 = (const struct elf_symbol *) arg2; | |
dcea6a95 AM |
8117 | int ret = strcmp (s1->name, s2->name); |
8118 | if (ret != 0) | |
8119 | return ret; | |
8120 | if (s1->u.p != s2->u.p) | |
8121 | return s1->u.p > s2->u.p ? 1 : -1; | |
8122 | return 0; | |
4d269e42 AM |
8123 | } |
8124 | ||
8125 | static struct elf_symbuf_head * | |
ef53be89 | 8126 | elf_create_symbuf (size_t symcount, Elf_Internal_Sym *isymbuf) |
4d269e42 | 8127 | { |
14b1c01e | 8128 | Elf_Internal_Sym **ind, **indbufend, **indbuf; |
4d269e42 AM |
8129 | struct elf_symbuf_symbol *ssym; |
8130 | struct elf_symbuf_head *ssymbuf, *ssymhead; | |
446f7ed5 | 8131 | size_t i, shndx_count, total_size, amt; |
4d269e42 | 8132 | |
446f7ed5 AM |
8133 | amt = symcount * sizeof (*indbuf); |
8134 | indbuf = (Elf_Internal_Sym **) bfd_malloc (amt); | |
4d269e42 AM |
8135 | if (indbuf == NULL) |
8136 | return NULL; | |
8137 | ||
8138 | for (ind = indbuf, i = 0; i < symcount; i++) | |
3818d4ab | 8139 | if (isymbuf[i].st_shndx != SHN_UNDEF) |
4d269e42 AM |
8140 | *ind++ = &isymbuf[i]; |
8141 | indbufend = ind; | |
8142 | ||
8143 | qsort (indbuf, indbufend - indbuf, sizeof (Elf_Internal_Sym *), | |
8144 | elf_sort_elf_symbol); | |
8145 | ||
8146 | shndx_count = 0; | |
8147 | if (indbufend > indbuf) | |
8148 | for (ind = indbuf, shndx_count++; ind < indbufend - 1; ind++) | |
8149 | if (ind[0]->st_shndx != ind[1]->st_shndx) | |
8150 | shndx_count++; | |
8151 | ||
3ae181ee L |
8152 | total_size = ((shndx_count + 1) * sizeof (*ssymbuf) |
8153 | + (indbufend - indbuf) * sizeof (*ssym)); | |
a50b1753 | 8154 | ssymbuf = (struct elf_symbuf_head *) bfd_malloc (total_size); |
4d269e42 AM |
8155 | if (ssymbuf == NULL) |
8156 | { | |
8157 | free (indbuf); | |
8158 | return NULL; | |
8159 | } | |
8160 | ||
3ae181ee | 8161 | ssym = (struct elf_symbuf_symbol *) (ssymbuf + shndx_count + 1); |
4d269e42 AM |
8162 | ssymbuf->ssym = NULL; |
8163 | ssymbuf->count = shndx_count; | |
8164 | ssymbuf->st_shndx = 0; | |
8165 | for (ssymhead = ssymbuf, ind = indbuf; ind < indbufend; ssym++, ind++) | |
8166 | { | |
8167 | if (ind == indbuf || ssymhead->st_shndx != (*ind)->st_shndx) | |
8168 | { | |
8169 | ssymhead++; | |
8170 | ssymhead->ssym = ssym; | |
8171 | ssymhead->count = 0; | |
8172 | ssymhead->st_shndx = (*ind)->st_shndx; | |
8173 | } | |
8174 | ssym->st_name = (*ind)->st_name; | |
8175 | ssym->st_info = (*ind)->st_info; | |
8176 | ssym->st_other = (*ind)->st_other; | |
8177 | ssymhead->count++; | |
8178 | } | |
ef53be89 | 8179 | BFD_ASSERT ((size_t) (ssymhead - ssymbuf) == shndx_count |
3ae181ee L |
8180 | && (((bfd_hostptr_t) ssym - (bfd_hostptr_t) ssymbuf) |
8181 | == total_size)); | |
4d269e42 AM |
8182 | |
8183 | free (indbuf); | |
8184 | return ssymbuf; | |
8185 | } | |
8186 | ||
8187 | /* Check if 2 sections define the same set of local and global | |
8188 | symbols. */ | |
8189 | ||
0a1b45a2 | 8190 | static bool |
4d269e42 AM |
8191 | bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2, |
8192 | struct bfd_link_info *info) | |
8193 | { | |
8194 | bfd *bfd1, *bfd2; | |
8195 | const struct elf_backend_data *bed1, *bed2; | |
8196 | Elf_Internal_Shdr *hdr1, *hdr2; | |
ef53be89 | 8197 | size_t symcount1, symcount2; |
4d269e42 AM |
8198 | Elf_Internal_Sym *isymbuf1, *isymbuf2; |
8199 | struct elf_symbuf_head *ssymbuf1, *ssymbuf2; | |
8200 | Elf_Internal_Sym *isym, *isymend; | |
8201 | struct elf_symbol *symtable1 = NULL, *symtable2 = NULL; | |
3818d4ab | 8202 | size_t count1, count2, sec_count1, sec_count2, i; |
cb33740c | 8203 | unsigned int shndx1, shndx2; |
0a1b45a2 AM |
8204 | bool result; |
8205 | bool ignore_section_symbol_p; | |
4d269e42 AM |
8206 | |
8207 | bfd1 = sec1->owner; | |
8208 | bfd2 = sec2->owner; | |
8209 | ||
4d269e42 AM |
8210 | /* Both sections have to be in ELF. */ |
8211 | if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour | |
8212 | || bfd_get_flavour (bfd2) != bfd_target_elf_flavour) | |
0a1b45a2 | 8213 | return false; |
4d269e42 AM |
8214 | |
8215 | if (elf_section_type (sec1) != elf_section_type (sec2)) | |
0a1b45a2 | 8216 | return false; |
4d269e42 | 8217 | |
4d269e42 AM |
8218 | shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1); |
8219 | shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2); | |
cb33740c | 8220 | if (shndx1 == SHN_BAD || shndx2 == SHN_BAD) |
0a1b45a2 | 8221 | return false; |
4d269e42 AM |
8222 | |
8223 | bed1 = get_elf_backend_data (bfd1); | |
8224 | bed2 = get_elf_backend_data (bfd2); | |
8225 | hdr1 = &elf_tdata (bfd1)->symtab_hdr; | |
8226 | symcount1 = hdr1->sh_size / bed1->s->sizeof_sym; | |
8227 | hdr2 = &elf_tdata (bfd2)->symtab_hdr; | |
8228 | symcount2 = hdr2->sh_size / bed2->s->sizeof_sym; | |
8229 | ||
8230 | if (symcount1 == 0 || symcount2 == 0) | |
0a1b45a2 | 8231 | return false; |
4d269e42 | 8232 | |
0a1b45a2 | 8233 | result = false; |
4d269e42 AM |
8234 | isymbuf1 = NULL; |
8235 | isymbuf2 = NULL; | |
a50b1753 NC |
8236 | ssymbuf1 = (struct elf_symbuf_head *) elf_tdata (bfd1)->symbuf; |
8237 | ssymbuf2 = (struct elf_symbuf_head *) elf_tdata (bfd2)->symbuf; | |
4d269e42 | 8238 | |
3818d4ab L |
8239 | /* Ignore section symbols only when matching non-debugging sections |
8240 | or linkonce section with comdat section. */ | |
8241 | ignore_section_symbol_p | |
8242 | = ((sec1->flags & SEC_DEBUGGING) == 0 | |
8243 | || ((elf_section_flags (sec1) & SHF_GROUP) | |
8244 | != (elf_section_flags (sec2) & SHF_GROUP))); | |
8245 | ||
4d269e42 AM |
8246 | if (ssymbuf1 == NULL) |
8247 | { | |
8248 | isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0, | |
8249 | NULL, NULL, NULL); | |
8250 | if (isymbuf1 == NULL) | |
8251 | goto done; | |
8252 | ||
67411cbf | 8253 | if (info != NULL && !info->reduce_memory_overheads) |
dcea6a95 AM |
8254 | { |
8255 | ssymbuf1 = elf_create_symbuf (symcount1, isymbuf1); | |
8256 | elf_tdata (bfd1)->symbuf = ssymbuf1; | |
8257 | } | |
4d269e42 AM |
8258 | } |
8259 | ||
8260 | if (ssymbuf1 == NULL || ssymbuf2 == NULL) | |
8261 | { | |
8262 | isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0, | |
8263 | NULL, NULL, NULL); | |
8264 | if (isymbuf2 == NULL) | |
8265 | goto done; | |
8266 | ||
67411cbf | 8267 | if (ssymbuf1 != NULL && info != NULL && !info->reduce_memory_overheads) |
dcea6a95 AM |
8268 | { |
8269 | ssymbuf2 = elf_create_symbuf (symcount2, isymbuf2); | |
8270 | elf_tdata (bfd2)->symbuf = ssymbuf2; | |
8271 | } | |
4d269e42 AM |
8272 | } |
8273 | ||
8274 | if (ssymbuf1 != NULL && ssymbuf2 != NULL) | |
8275 | { | |
8276 | /* Optimized faster version. */ | |
ef53be89 | 8277 | size_t lo, hi, mid; |
4d269e42 AM |
8278 | struct elf_symbol *symp; |
8279 | struct elf_symbuf_symbol *ssym, *ssymend; | |
8280 | ||
8281 | lo = 0; | |
8282 | hi = ssymbuf1->count; | |
8283 | ssymbuf1++; | |
8284 | count1 = 0; | |
3818d4ab | 8285 | sec_count1 = 0; |
4d269e42 AM |
8286 | while (lo < hi) |
8287 | { | |
8288 | mid = (lo + hi) / 2; | |
cb33740c | 8289 | if (shndx1 < ssymbuf1[mid].st_shndx) |
4d269e42 | 8290 | hi = mid; |
cb33740c | 8291 | else if (shndx1 > ssymbuf1[mid].st_shndx) |
4d269e42 AM |
8292 | lo = mid + 1; |
8293 | else | |
8294 | { | |
8295 | count1 = ssymbuf1[mid].count; | |
8296 | ssymbuf1 += mid; | |
8297 | break; | |
8298 | } | |
8299 | } | |
3818d4ab L |
8300 | if (ignore_section_symbol_p) |
8301 | { | |
8302 | for (i = 0; i < count1; i++) | |
8303 | if (ELF_ST_TYPE (ssymbuf1->ssym[i].st_info) == STT_SECTION) | |
8304 | sec_count1++; | |
8305 | count1 -= sec_count1; | |
8306 | } | |
4d269e42 AM |
8307 | |
8308 | lo = 0; | |
8309 | hi = ssymbuf2->count; | |
8310 | ssymbuf2++; | |
8311 | count2 = 0; | |
3818d4ab | 8312 | sec_count2 = 0; |
4d269e42 AM |
8313 | while (lo < hi) |
8314 | { | |
8315 | mid = (lo + hi) / 2; | |
cb33740c | 8316 | if (shndx2 < ssymbuf2[mid].st_shndx) |
4d269e42 | 8317 | hi = mid; |
cb33740c | 8318 | else if (shndx2 > ssymbuf2[mid].st_shndx) |
4d269e42 AM |
8319 | lo = mid + 1; |
8320 | else | |
8321 | { | |
8322 | count2 = ssymbuf2[mid].count; | |
8323 | ssymbuf2 += mid; | |
8324 | break; | |
8325 | } | |
8326 | } | |
3818d4ab L |
8327 | if (ignore_section_symbol_p) |
8328 | { | |
8329 | for (i = 0; i < count2; i++) | |
8330 | if (ELF_ST_TYPE (ssymbuf2->ssym[i].st_info) == STT_SECTION) | |
8331 | sec_count2++; | |
8332 | count2 -= sec_count2; | |
8333 | } | |
4d269e42 AM |
8334 | |
8335 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
8336 | goto done; | |
8337 | ||
ca4be51c AM |
8338 | symtable1 |
8339 | = (struct elf_symbol *) bfd_malloc (count1 * sizeof (*symtable1)); | |
8340 | symtable2 | |
8341 | = (struct elf_symbol *) bfd_malloc (count2 * sizeof (*symtable2)); | |
4d269e42 AM |
8342 | if (symtable1 == NULL || symtable2 == NULL) |
8343 | goto done; | |
8344 | ||
8345 | symp = symtable1; | |
3818d4ab L |
8346 | for (ssym = ssymbuf1->ssym, ssymend = ssym + count1 + sec_count1; |
8347 | ssym < ssymend; ssym++) | |
8348 | if (sec_count1 == 0 | |
8349 | || ELF_ST_TYPE (ssym->st_info) != STT_SECTION) | |
8350 | { | |
8351 | symp->u.ssym = ssym; | |
8352 | symp->name = bfd_elf_string_from_elf_section (bfd1, | |
8353 | hdr1->sh_link, | |
8354 | ssym->st_name); | |
8355 | symp++; | |
8356 | } | |
4d269e42 AM |
8357 | |
8358 | symp = symtable2; | |
3818d4ab L |
8359 | for (ssym = ssymbuf2->ssym, ssymend = ssym + count2 + sec_count2; |
8360 | ssym < ssymend; ssym++) | |
8361 | if (sec_count2 == 0 | |
8362 | || ELF_ST_TYPE (ssym->st_info) != STT_SECTION) | |
8363 | { | |
8364 | symp->u.ssym = ssym; | |
8365 | symp->name = bfd_elf_string_from_elf_section (bfd2, | |
8366 | hdr2->sh_link, | |
8367 | ssym->st_name); | |
8368 | symp++; | |
8369 | } | |
4d269e42 AM |
8370 | |
8371 | /* Sort symbol by name. */ | |
8372 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
8373 | elf_sym_name_compare); | |
8374 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
8375 | elf_sym_name_compare); | |
8376 | ||
8377 | for (i = 0; i < count1; i++) | |
8378 | /* Two symbols must have the same binding, type and name. */ | |
8379 | if (symtable1 [i].u.ssym->st_info != symtable2 [i].u.ssym->st_info | |
8380 | || symtable1 [i].u.ssym->st_other != symtable2 [i].u.ssym->st_other | |
8381 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
8382 | goto done; | |
8383 | ||
0a1b45a2 | 8384 | result = true; |
4d269e42 AM |
8385 | goto done; |
8386 | } | |
8387 | ||
a50b1753 NC |
8388 | symtable1 = (struct elf_symbol *) |
8389 | bfd_malloc (symcount1 * sizeof (struct elf_symbol)); | |
8390 | symtable2 = (struct elf_symbol *) | |
8391 | bfd_malloc (symcount2 * sizeof (struct elf_symbol)); | |
4d269e42 AM |
8392 | if (symtable1 == NULL || symtable2 == NULL) |
8393 | goto done; | |
8394 | ||
8395 | /* Count definitions in the section. */ | |
8396 | count1 = 0; | |
8397 | for (isym = isymbuf1, isymend = isym + symcount1; isym < isymend; isym++) | |
3818d4ab L |
8398 | if (isym->st_shndx == shndx1 |
8399 | && (!ignore_section_symbol_p | |
8400 | || ELF_ST_TYPE (isym->st_info) != STT_SECTION)) | |
4d269e42 AM |
8401 | symtable1[count1++].u.isym = isym; |
8402 | ||
8403 | count2 = 0; | |
8404 | for (isym = isymbuf2, isymend = isym + symcount2; isym < isymend; isym++) | |
3818d4ab L |
8405 | if (isym->st_shndx == shndx2 |
8406 | && (!ignore_section_symbol_p | |
8407 | || ELF_ST_TYPE (isym->st_info) != STT_SECTION)) | |
4d269e42 AM |
8408 | symtable2[count2++].u.isym = isym; |
8409 | ||
8410 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
8411 | goto done; | |
8412 | ||
8413 | for (i = 0; i < count1; i++) | |
8414 | symtable1[i].name | |
8415 | = bfd_elf_string_from_elf_section (bfd1, hdr1->sh_link, | |
8416 | symtable1[i].u.isym->st_name); | |
8417 | ||
8418 | for (i = 0; i < count2; i++) | |
8419 | symtable2[i].name | |
8420 | = bfd_elf_string_from_elf_section (bfd2, hdr2->sh_link, | |
8421 | symtable2[i].u.isym->st_name); | |
8422 | ||
8423 | /* Sort symbol by name. */ | |
8424 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
8425 | elf_sym_name_compare); | |
8426 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
8427 | elf_sym_name_compare); | |
8428 | ||
8429 | for (i = 0; i < count1; i++) | |
8430 | /* Two symbols must have the same binding, type and name. */ | |
8431 | if (symtable1 [i].u.isym->st_info != symtable2 [i].u.isym->st_info | |
8432 | || symtable1 [i].u.isym->st_other != symtable2 [i].u.isym->st_other | |
8433 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
8434 | goto done; | |
8435 | ||
0a1b45a2 | 8436 | result = true; |
4d269e42 | 8437 | |
dc1e8a47 | 8438 | done: |
c9594989 AM |
8439 | free (symtable1); |
8440 | free (symtable2); | |
8441 | free (isymbuf1); | |
8442 | free (isymbuf2); | |
4d269e42 AM |
8443 | |
8444 | return result; | |
8445 | } | |
8446 | ||
8447 | /* Return TRUE if 2 section types are compatible. */ | |
8448 | ||
0a1b45a2 | 8449 | bool |
4d269e42 AM |
8450 | _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec, |
8451 | bfd *bbfd, const asection *bsec) | |
8452 | { | |
8453 | if (asec == NULL | |
8454 | || bsec == NULL | |
8455 | || abfd->xvec->flavour != bfd_target_elf_flavour | |
8456 | || bbfd->xvec->flavour != bfd_target_elf_flavour) | |
0a1b45a2 | 8457 | return true; |
4d269e42 AM |
8458 | |
8459 | return elf_section_type (asec) == elf_section_type (bsec); | |
8460 | } | |
8461 | \f | |
c152c796 AM |
8462 | /* Final phase of ELF linker. */ |
8463 | ||
8464 | /* A structure we use to avoid passing large numbers of arguments. */ | |
8465 | ||
8466 | struct elf_final_link_info | |
8467 | { | |
8468 | /* General link information. */ | |
8469 | struct bfd_link_info *info; | |
8470 | /* Output BFD. */ | |
8471 | bfd *output_bfd; | |
8472 | /* Symbol string table. */ | |
ef10c3ac | 8473 | struct elf_strtab_hash *symstrtab; |
c152c796 AM |
8474 | /* .hash section. */ |
8475 | asection *hash_sec; | |
8476 | /* symbol version section (.gnu.version). */ | |
8477 | asection *symver_sec; | |
8478 | /* Buffer large enough to hold contents of any section. */ | |
8479 | bfd_byte *contents; | |
8480 | /* Buffer large enough to hold external relocs of any section. */ | |
8481 | void *external_relocs; | |
8482 | /* Buffer large enough to hold internal relocs of any section. */ | |
8483 | Elf_Internal_Rela *internal_relocs; | |
8484 | /* Buffer large enough to hold external local symbols of any input | |
8485 | BFD. */ | |
8486 | bfd_byte *external_syms; | |
8487 | /* And a buffer for symbol section indices. */ | |
8488 | Elf_External_Sym_Shndx *locsym_shndx; | |
8489 | /* Buffer large enough to hold internal local symbols of any input | |
8490 | BFD. */ | |
8491 | Elf_Internal_Sym *internal_syms; | |
8492 | /* Array large enough to hold a symbol index for each local symbol | |
8493 | of any input BFD. */ | |
8494 | long *indices; | |
8495 | /* Array large enough to hold a section pointer for each local | |
8496 | symbol of any input BFD. */ | |
8497 | asection **sections; | |
ef10c3ac | 8498 | /* Buffer for SHT_SYMTAB_SHNDX section. */ |
c152c796 | 8499 | Elf_External_Sym_Shndx *symshndxbuf; |
ffbc01cc AM |
8500 | /* Number of STT_FILE syms seen. */ |
8501 | size_t filesym_count; | |
496afd17 L |
8502 | /* Local symbol hash table. */ |
8503 | struct bfd_hash_table local_hash_table; | |
c152c796 AM |
8504 | }; |
8505 | ||
496afd17 L |
8506 | struct local_hash_entry |
8507 | { | |
8508 | /* Base hash table entry structure. */ | |
8509 | struct bfd_hash_entry root; | |
8510 | /* Size of the local symbol name. */ | |
8511 | size_t size; | |
8512 | /* Number of the duplicated local symbol names. */ | |
8513 | long count; | |
8514 | }; | |
8515 | ||
8516 | /* Create an entry in the local symbol hash table. */ | |
8517 | ||
8518 | static struct bfd_hash_entry * | |
8519 | local_hash_newfunc (struct bfd_hash_entry *entry, | |
8520 | struct bfd_hash_table *table, | |
8521 | const char *string) | |
8522 | { | |
8523 | ||
8524 | /* Allocate the structure if it has not already been allocated by a | |
8525 | subclass. */ | |
8526 | if (entry == NULL) | |
8527 | { | |
8528 | entry = bfd_hash_allocate (table, | |
8529 | sizeof (struct local_hash_entry)); | |
8530 | if (entry == NULL) | |
8531 | return entry; | |
8532 | } | |
8533 | ||
8534 | /* Call the allocation method of the superclass. */ | |
8535 | entry = bfd_hash_newfunc (entry, table, string); | |
8536 | if (entry != NULL) | |
8537 | { | |
8538 | ((struct local_hash_entry *) entry)->count = 0; | |
8539 | ((struct local_hash_entry *) entry)->size = 0; | |
8540 | } | |
8541 | ||
8542 | return entry; | |
8543 | } | |
8544 | ||
c152c796 AM |
8545 | /* This struct is used to pass information to elf_link_output_extsym. */ |
8546 | ||
8547 | struct elf_outext_info | |
8548 | { | |
0a1b45a2 AM |
8549 | bool failed; |
8550 | bool localsyms; | |
8551 | bool file_sym_done; | |
8b127cbc | 8552 | struct elf_final_link_info *flinfo; |
c152c796 AM |
8553 | }; |
8554 | ||
d9352518 DB |
8555 | |
8556 | /* Support for evaluating a complex relocation. | |
8557 | ||
8558 | Complex relocations are generalized, self-describing relocations. The | |
8559 | implementation of them consists of two parts: complex symbols, and the | |
a0c8462f | 8560 | relocations themselves. |
d9352518 | 8561 | |
4b69ce9b | 8562 | The relocations use a reserved elf-wide relocation type code (R_RELC |
d9352518 DB |
8563 | external / BFD_RELOC_RELC internal) and an encoding of relocation field |
8564 | information (start bit, end bit, word width, etc) into the addend. This | |
8565 | information is extracted from CGEN-generated operand tables within gas. | |
8566 | ||
4b69ce9b | 8567 | Complex symbols are mangled symbols (STT_RELC external / BSF_RELC |
d9352518 DB |
8568 | internal) representing prefix-notation expressions, including but not |
8569 | limited to those sorts of expressions normally encoded as addends in the | |
8570 | addend field. The symbol mangling format is: | |
8571 | ||
8572 | <node> := <literal> | |
07d6d2b8 AM |
8573 | | <unary-operator> ':' <node> |
8574 | | <binary-operator> ':' <node> ':' <node> | |
d9352518 DB |
8575 | ; |
8576 | ||
8577 | <literal> := 's' <digits=N> ':' <N character symbol name> | |
07d6d2b8 | 8578 | | 'S' <digits=N> ':' <N character section name> |
d9352518 DB |
8579 | | '#' <hexdigits> |
8580 | ; | |
8581 | ||
8582 | <binary-operator> := as in C | |
8583 | <unary-operator> := as in C, plus "0-" for unambiguous negation. */ | |
8584 | ||
8585 | static void | |
a0c8462f AM |
8586 | set_symbol_value (bfd *bfd_with_globals, |
8587 | Elf_Internal_Sym *isymbuf, | |
8588 | size_t locsymcount, | |
8589 | size_t symidx, | |
8590 | bfd_vma val) | |
d9352518 | 8591 | { |
8977835c AM |
8592 | struct elf_link_hash_entry **sym_hashes; |
8593 | struct elf_link_hash_entry *h; | |
8594 | size_t extsymoff = locsymcount; | |
d9352518 | 8595 | |
8977835c | 8596 | if (symidx < locsymcount) |
d9352518 | 8597 | { |
8977835c AM |
8598 | Elf_Internal_Sym *sym; |
8599 | ||
8600 | sym = isymbuf + symidx; | |
8601 | if (ELF_ST_BIND (sym->st_info) == STB_LOCAL) | |
8602 | { | |
8603 | /* It is a local symbol: move it to the | |
8604 | "absolute" section and give it a value. */ | |
8605 | sym->st_shndx = SHN_ABS; | |
8606 | sym->st_value = val; | |
8607 | return; | |
8608 | } | |
8609 | BFD_ASSERT (elf_bad_symtab (bfd_with_globals)); | |
8610 | extsymoff = 0; | |
d9352518 | 8611 | } |
8977835c AM |
8612 | |
8613 | /* It is a global symbol: set its link type | |
8614 | to "defined" and give it a value. */ | |
8615 | ||
8616 | sym_hashes = elf_sym_hashes (bfd_with_globals); | |
8617 | h = sym_hashes [symidx - extsymoff]; | |
8618 | while (h->root.type == bfd_link_hash_indirect | |
8619 | || h->root.type == bfd_link_hash_warning) | |
8620 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8621 | h->root.type = bfd_link_hash_defined; | |
8622 | h->root.u.def.value = val; | |
8623 | h->root.u.def.section = bfd_abs_section_ptr; | |
d9352518 DB |
8624 | } |
8625 | ||
0a1b45a2 | 8626 | static bool |
a0c8462f AM |
8627 | resolve_symbol (const char *name, |
8628 | bfd *input_bfd, | |
8b127cbc | 8629 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
8630 | bfd_vma *result, |
8631 | Elf_Internal_Sym *isymbuf, | |
8632 | size_t locsymcount) | |
d9352518 | 8633 | { |
a0c8462f AM |
8634 | Elf_Internal_Sym *sym; |
8635 | struct bfd_link_hash_entry *global_entry; | |
8636 | const char *candidate = NULL; | |
8637 | Elf_Internal_Shdr *symtab_hdr; | |
8638 | size_t i; | |
8639 | ||
d9352518 DB |
8640 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
8641 | ||
8642 | for (i = 0; i < locsymcount; ++ i) | |
8643 | { | |
8977835c | 8644 | sym = isymbuf + i; |
d9352518 DB |
8645 | |
8646 | if (ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
8647 | continue; | |
8648 | ||
8649 | candidate = bfd_elf_string_from_elf_section (input_bfd, | |
8650 | symtab_hdr->sh_link, | |
8651 | sym->st_name); | |
8652 | #ifdef DEBUG | |
0f02bbd9 AM |
8653 | printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n", |
8654 | name, candidate, (unsigned long) sym->st_value); | |
d9352518 DB |
8655 | #endif |
8656 | if (candidate && strcmp (candidate, name) == 0) | |
8657 | { | |
8b127cbc | 8658 | asection *sec = flinfo->sections [i]; |
d9352518 | 8659 | |
0f02bbd9 AM |
8660 | *result = _bfd_elf_rel_local_sym (input_bfd, sym, &sec, 0); |
8661 | *result += sec->output_offset + sec->output_section->vma; | |
d9352518 | 8662 | #ifdef DEBUG |
0f02bbd9 AM |
8663 | printf ("Found symbol with value %8.8lx\n", |
8664 | (unsigned long) *result); | |
d9352518 | 8665 | #endif |
0a1b45a2 | 8666 | return true; |
d9352518 DB |
8667 | } |
8668 | } | |
8669 | ||
8670 | /* Hmm, haven't found it yet. perhaps it is a global. */ | |
8b127cbc | 8671 | global_entry = bfd_link_hash_lookup (flinfo->info->hash, name, |
0a1b45a2 | 8672 | false, false, true); |
d9352518 | 8673 | if (!global_entry) |
0a1b45a2 | 8674 | return false; |
a0c8462f | 8675 | |
d9352518 DB |
8676 | if (global_entry->type == bfd_link_hash_defined |
8677 | || global_entry->type == bfd_link_hash_defweak) | |
8678 | { | |
a0c8462f AM |
8679 | *result = (global_entry->u.def.value |
8680 | + global_entry->u.def.section->output_section->vma | |
8681 | + global_entry->u.def.section->output_offset); | |
d9352518 | 8682 | #ifdef DEBUG |
0f02bbd9 AM |
8683 | printf ("Found GLOBAL symbol '%s' with value %8.8lx\n", |
8684 | global_entry->root.string, (unsigned long) *result); | |
d9352518 | 8685 | #endif |
0a1b45a2 | 8686 | return true; |
a0c8462f | 8687 | } |
d9352518 | 8688 | |
0a1b45a2 | 8689 | return false; |
d9352518 DB |
8690 | } |
8691 | ||
37b01f6a DG |
8692 | /* Looks up NAME in SECTIONS. If found sets RESULT to NAME's address (in |
8693 | bytes) and returns TRUE, otherwise returns FALSE. Accepts pseudo-section | |
8694 | names like "foo.end" which is the end address of section "foo". */ | |
07d6d2b8 | 8695 | |
0a1b45a2 | 8696 | static bool |
a0c8462f AM |
8697 | resolve_section (const char *name, |
8698 | asection *sections, | |
37b01f6a DG |
8699 | bfd_vma *result, |
8700 | bfd * abfd) | |
d9352518 | 8701 | { |
a0c8462f AM |
8702 | asection *curr; |
8703 | unsigned int len; | |
d9352518 | 8704 | |
a0c8462f | 8705 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
8706 | if (strcmp (curr->name, name) == 0) |
8707 | { | |
8708 | *result = curr->vma; | |
0a1b45a2 | 8709 | return true; |
d9352518 DB |
8710 | } |
8711 | ||
8712 | /* Hmm. still haven't found it. try pseudo-section names. */ | |
37b01f6a | 8713 | /* FIXME: This could be coded more efficiently... */ |
a0c8462f | 8714 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
8715 | { |
8716 | len = strlen (curr->name); | |
a0c8462f | 8717 | if (len > strlen (name)) |
d9352518 DB |
8718 | continue; |
8719 | ||
8720 | if (strncmp (curr->name, name, len) == 0) | |
8721 | { | |
3f3328b8 | 8722 | if (startswith (name + len, ".end")) |
d9352518 | 8723 | { |
61826503 | 8724 | *result = (curr->vma |
bb294208 | 8725 | + curr->size / bfd_octets_per_byte (abfd, curr)); |
0a1b45a2 | 8726 | return true; |
d9352518 DB |
8727 | } |
8728 | ||
8729 | /* Insert more pseudo-section names here, if you like. */ | |
8730 | } | |
8731 | } | |
a0c8462f | 8732 | |
0a1b45a2 | 8733 | return false; |
d9352518 DB |
8734 | } |
8735 | ||
8736 | static void | |
a0c8462f | 8737 | undefined_reference (const char *reftype, const char *name) |
d9352518 | 8738 | { |
695344c0 | 8739 | /* xgettext:c-format */ |
a0c8462f AM |
8740 | _bfd_error_handler (_("undefined %s reference in complex symbol: %s"), |
8741 | reftype, name); | |
4b69ce9b | 8742 | bfd_set_error (bfd_error_bad_value); |
d9352518 DB |
8743 | } |
8744 | ||
0a1b45a2 | 8745 | static bool |
a0c8462f AM |
8746 | eval_symbol (bfd_vma *result, |
8747 | const char **symp, | |
8748 | bfd *input_bfd, | |
8b127cbc | 8749 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
8750 | bfd_vma dot, |
8751 | Elf_Internal_Sym *isymbuf, | |
8752 | size_t locsymcount, | |
8753 | int signed_p) | |
d9352518 | 8754 | { |
4b93929b NC |
8755 | size_t len; |
8756 | size_t symlen; | |
a0c8462f AM |
8757 | bfd_vma a; |
8758 | bfd_vma b; | |
4b93929b | 8759 | char symbuf[4096]; |
0f02bbd9 | 8760 | const char *sym = *symp; |
a0c8462f | 8761 | const char *symend; |
0a1b45a2 | 8762 | bool symbol_is_section = false; |
d9352518 DB |
8763 | |
8764 | len = strlen (sym); | |
8765 | symend = sym + len; | |
8766 | ||
4b93929b | 8767 | if (len < 1 || len > sizeof (symbuf)) |
d9352518 DB |
8768 | { |
8769 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 8770 | return false; |
d9352518 | 8771 | } |
a0c8462f | 8772 | |
d9352518 DB |
8773 | switch (* sym) |
8774 | { | |
8775 | case '.': | |
0f02bbd9 AM |
8776 | *result = dot; |
8777 | *symp = sym + 1; | |
0a1b45a2 | 8778 | return true; |
d9352518 DB |
8779 | |
8780 | case '#': | |
0f02bbd9 AM |
8781 | ++sym; |
8782 | *result = strtoul (sym, (char **) symp, 16); | |
0a1b45a2 | 8783 | return true; |
d9352518 DB |
8784 | |
8785 | case 'S': | |
0a1b45a2 | 8786 | symbol_is_section = true; |
1a0670f3 | 8787 | /* Fall through. */ |
a0c8462f | 8788 | case 's': |
0f02bbd9 AM |
8789 | ++sym; |
8790 | symlen = strtol (sym, (char **) symp, 10); | |
8791 | sym = *symp + 1; /* Skip the trailing ':'. */ | |
d9352518 | 8792 | |
4b93929b | 8793 | if (symend < sym || symlen + 1 > sizeof (symbuf)) |
d9352518 DB |
8794 | { |
8795 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 8796 | return false; |
d9352518 DB |
8797 | } |
8798 | ||
8799 | memcpy (symbuf, sym, symlen); | |
a0c8462f | 8800 | symbuf[symlen] = '\0'; |
0f02bbd9 | 8801 | *symp = sym + symlen; |
a0c8462f AM |
8802 | |
8803 | /* Is it always possible, with complex symbols, that gas "mis-guessed" | |
d9352518 DB |
8804 | the symbol as a section, or vice-versa. so we're pretty liberal in our |
8805 | interpretation here; section means "try section first", not "must be a | |
8806 | section", and likewise with symbol. */ | |
8807 | ||
a0c8462f | 8808 | if (symbol_is_section) |
d9352518 | 8809 | { |
37b01f6a | 8810 | if (!resolve_section (symbuf, flinfo->output_bfd->sections, result, input_bfd) |
8b127cbc | 8811 | && !resolve_symbol (symbuf, input_bfd, flinfo, result, |
8977835c | 8812 | isymbuf, locsymcount)) |
d9352518 DB |
8813 | { |
8814 | undefined_reference ("section", symbuf); | |
0a1b45a2 | 8815 | return false; |
d9352518 | 8816 | } |
a0c8462f AM |
8817 | } |
8818 | else | |
d9352518 | 8819 | { |
8b127cbc | 8820 | if (!resolve_symbol (symbuf, input_bfd, flinfo, result, |
8977835c | 8821 | isymbuf, locsymcount) |
8b127cbc | 8822 | && !resolve_section (symbuf, flinfo->output_bfd->sections, |
37b01f6a | 8823 | result, input_bfd)) |
d9352518 DB |
8824 | { |
8825 | undefined_reference ("symbol", symbuf); | |
0a1b45a2 | 8826 | return false; |
d9352518 DB |
8827 | } |
8828 | } | |
8829 | ||
0a1b45a2 | 8830 | return true; |
a0c8462f | 8831 | |
d9352518 DB |
8832 | /* All that remains are operators. */ |
8833 | ||
8834 | #define UNARY_OP(op) \ | |
3f3328b8 | 8835 | if (startswith (sym, #op)) \ |
d9352518 DB |
8836 | { \ |
8837 | sym += strlen (#op); \ | |
a0c8462f AM |
8838 | if (*sym == ':') \ |
8839 | ++sym; \ | |
0f02bbd9 | 8840 | *symp = sym; \ |
8b127cbc | 8841 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 8842 | isymbuf, locsymcount, signed_p)) \ |
0a1b45a2 | 8843 | return false; \ |
a0c8462f | 8844 | if (signed_p) \ |
0f02bbd9 | 8845 | *result = op ((bfd_signed_vma) a); \ |
a0c8462f AM |
8846 | else \ |
8847 | *result = op a; \ | |
0a1b45a2 | 8848 | return true; \ |
d9352518 DB |
8849 | } |
8850 | ||
4b69ce9b | 8851 | #define BINARY_OP_HEAD(op) \ |
3f3328b8 | 8852 | if (startswith (sym, #op)) \ |
d9352518 DB |
8853 | { \ |
8854 | sym += strlen (#op); \ | |
a0c8462f AM |
8855 | if (*sym == ':') \ |
8856 | ++sym; \ | |
0f02bbd9 | 8857 | *symp = sym; \ |
8b127cbc | 8858 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 8859 | isymbuf, locsymcount, signed_p)) \ |
0a1b45a2 | 8860 | return false; \ |
0f02bbd9 | 8861 | ++*symp; \ |
8b127cbc | 8862 | if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 8863 | isymbuf, locsymcount, signed_p)) \ |
0a1b45a2 | 8864 | return false; |
4b69ce9b | 8865 | #define BINARY_OP_TAIL(op) \ |
a0c8462f | 8866 | if (signed_p) \ |
0f02bbd9 | 8867 | *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \ |
a0c8462f AM |
8868 | else \ |
8869 | *result = a op b; \ | |
0a1b45a2 | 8870 | return true; \ |
d9352518 | 8871 | } |
4b69ce9b | 8872 | #define BINARY_OP(op) BINARY_OP_HEAD(op) BINARY_OP_TAIL(op) |
d9352518 DB |
8873 | |
8874 | default: | |
8875 | UNARY_OP (0-); | |
4b69ce9b AM |
8876 | BINARY_OP_HEAD (<<); |
8877 | if (b >= sizeof (a) * CHAR_BIT) | |
8878 | { | |
8879 | *result = 0; | |
0a1b45a2 | 8880 | return true; |
4b69ce9b AM |
8881 | } |
8882 | signed_p = 0; | |
8883 | BINARY_OP_TAIL (<<); | |
8884 | BINARY_OP_HEAD (>>); | |
8885 | if (b >= sizeof (a) * CHAR_BIT) | |
8886 | { | |
8887 | *result = signed_p && (bfd_signed_vma) a < 0 ? -1 : 0; | |
0a1b45a2 | 8888 | return true; |
4b69ce9b AM |
8889 | } |
8890 | BINARY_OP_TAIL (>>); | |
d9352518 DB |
8891 | BINARY_OP (==); |
8892 | BINARY_OP (!=); | |
8893 | BINARY_OP (<=); | |
8894 | BINARY_OP (>=); | |
8895 | BINARY_OP (&&); | |
8896 | BINARY_OP (||); | |
8897 | UNARY_OP (~); | |
8898 | UNARY_OP (!); | |
8899 | BINARY_OP (*); | |
4b69ce9b AM |
8900 | BINARY_OP_HEAD (/); |
8901 | if (b == 0) | |
8902 | { | |
8903 | _bfd_error_handler (_("division by zero")); | |
8904 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 8905 | return false; |
4b69ce9b AM |
8906 | } |
8907 | BINARY_OP_TAIL (/); | |
8908 | BINARY_OP_HEAD (%); | |
8909 | if (b == 0) | |
8910 | { | |
8911 | _bfd_error_handler (_("division by zero")); | |
8912 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 8913 | return false; |
4b69ce9b AM |
8914 | } |
8915 | BINARY_OP_TAIL (%); | |
d9352518 DB |
8916 | BINARY_OP (^); |
8917 | BINARY_OP (|); | |
8918 | BINARY_OP (&); | |
8919 | BINARY_OP (+); | |
8920 | BINARY_OP (-); | |
8921 | BINARY_OP (<); | |
8922 | BINARY_OP (>); | |
8923 | #undef UNARY_OP | |
8924 | #undef BINARY_OP | |
8925 | _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym); | |
8926 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 8927 | return false; |
d9352518 DB |
8928 | } |
8929 | } | |
8930 | ||
d9352518 | 8931 | static void |
a0c8462f AM |
8932 | put_value (bfd_vma size, |
8933 | unsigned long chunksz, | |
8934 | bfd *input_bfd, | |
8935 | bfd_vma x, | |
8936 | bfd_byte *location) | |
d9352518 DB |
8937 | { |
8938 | location += (size - chunksz); | |
8939 | ||
41cd1ad1 | 8940 | for (; size; size -= chunksz, location -= chunksz) |
d9352518 DB |
8941 | { |
8942 | switch (chunksz) | |
8943 | { | |
d9352518 DB |
8944 | case 1: |
8945 | bfd_put_8 (input_bfd, x, location); | |
41cd1ad1 | 8946 | x >>= 8; |
d9352518 DB |
8947 | break; |
8948 | case 2: | |
8949 | bfd_put_16 (input_bfd, x, location); | |
41cd1ad1 | 8950 | x >>= 16; |
d9352518 DB |
8951 | break; |
8952 | case 4: | |
8953 | bfd_put_32 (input_bfd, x, location); | |
65164438 NC |
8954 | /* Computed this way because x >>= 32 is undefined if x is a 32-bit value. */ |
8955 | x >>= 16; | |
8956 | x >>= 16; | |
d9352518 | 8957 | break; |
d9352518 | 8958 | #ifdef BFD64 |
41cd1ad1 | 8959 | case 8: |
d9352518 | 8960 | bfd_put_64 (input_bfd, x, location); |
41cd1ad1 NC |
8961 | /* Computed this way because x >>= 64 is undefined if x is a 64-bit value. */ |
8962 | x >>= 32; | |
8963 | x >>= 32; | |
8964 | break; | |
d9352518 | 8965 | #endif |
41cd1ad1 NC |
8966 | default: |
8967 | abort (); | |
d9352518 DB |
8968 | break; |
8969 | } | |
8970 | } | |
8971 | } | |
8972 | ||
a0c8462f AM |
8973 | static bfd_vma |
8974 | get_value (bfd_vma size, | |
8975 | unsigned long chunksz, | |
8976 | bfd *input_bfd, | |
8977 | bfd_byte *location) | |
d9352518 | 8978 | { |
9b239e0e | 8979 | int shift; |
d9352518 DB |
8980 | bfd_vma x = 0; |
8981 | ||
9b239e0e NC |
8982 | /* Sanity checks. */ |
8983 | BFD_ASSERT (chunksz <= sizeof (x) | |
8984 | && size >= chunksz | |
8985 | && chunksz != 0 | |
8986 | && (size % chunksz) == 0 | |
8987 | && input_bfd != NULL | |
8988 | && location != NULL); | |
8989 | ||
8990 | if (chunksz == sizeof (x)) | |
8991 | { | |
8992 | BFD_ASSERT (size == chunksz); | |
8993 | ||
8994 | /* Make sure that we do not perform an undefined shift operation. | |
8995 | We know that size == chunksz so there will only be one iteration | |
8996 | of the loop below. */ | |
8997 | shift = 0; | |
8998 | } | |
8999 | else | |
9000 | shift = 8 * chunksz; | |
9001 | ||
a0c8462f | 9002 | for (; size; size -= chunksz, location += chunksz) |
d9352518 DB |
9003 | { |
9004 | switch (chunksz) | |
9005 | { | |
d9352518 | 9006 | case 1: |
9b239e0e | 9007 | x = (x << shift) | bfd_get_8 (input_bfd, location); |
d9352518 DB |
9008 | break; |
9009 | case 2: | |
9b239e0e | 9010 | x = (x << shift) | bfd_get_16 (input_bfd, location); |
d9352518 DB |
9011 | break; |
9012 | case 4: | |
9b239e0e | 9013 | x = (x << shift) | bfd_get_32 (input_bfd, location); |
d9352518 | 9014 | break; |
d9352518 | 9015 | #ifdef BFD64 |
9b239e0e NC |
9016 | case 8: |
9017 | x = (x << shift) | bfd_get_64 (input_bfd, location); | |
d9352518 | 9018 | break; |
9b239e0e NC |
9019 | #endif |
9020 | default: | |
9021 | abort (); | |
d9352518 DB |
9022 | } |
9023 | } | |
9024 | return x; | |
9025 | } | |
9026 | ||
a0c8462f AM |
9027 | static void |
9028 | decode_complex_addend (unsigned long *start, /* in bits */ | |
9029 | unsigned long *oplen, /* in bits */ | |
9030 | unsigned long *len, /* in bits */ | |
9031 | unsigned long *wordsz, /* in bytes */ | |
9032 | unsigned long *chunksz, /* in bytes */ | |
9033 | unsigned long *lsb0_p, | |
9034 | unsigned long *signed_p, | |
9035 | unsigned long *trunc_p, | |
9036 | unsigned long encoded) | |
d9352518 | 9037 | { |
07d6d2b8 AM |
9038 | * start = encoded & 0x3F; |
9039 | * len = (encoded >> 6) & 0x3F; | |
d9352518 DB |
9040 | * oplen = (encoded >> 12) & 0x3F; |
9041 | * wordsz = (encoded >> 18) & 0xF; | |
9042 | * chunksz = (encoded >> 22) & 0xF; | |
9043 | * lsb0_p = (encoded >> 27) & 1; | |
9044 | * signed_p = (encoded >> 28) & 1; | |
9045 | * trunc_p = (encoded >> 29) & 1; | |
9046 | } | |
9047 | ||
cdfeee4f | 9048 | bfd_reloc_status_type |
0f02bbd9 | 9049 | bfd_elf_perform_complex_relocation (bfd *input_bfd, |
bb294208 | 9050 | asection *input_section, |
0f02bbd9 AM |
9051 | bfd_byte *contents, |
9052 | Elf_Internal_Rela *rel, | |
9053 | bfd_vma relocation) | |
d9352518 | 9054 | { |
0f02bbd9 AM |
9055 | bfd_vma shift, x, mask; |
9056 | unsigned long start, oplen, len, wordsz, chunksz, lsb0_p, signed_p, trunc_p; | |
cdfeee4f | 9057 | bfd_reloc_status_type r; |
bb294208 | 9058 | bfd_size_type octets; |
d9352518 DB |
9059 | |
9060 | /* Perform this reloc, since it is complex. | |
9061 | (this is not to say that it necessarily refers to a complex | |
9062 | symbol; merely that it is a self-describing CGEN based reloc. | |
9063 | i.e. the addend has the complete reloc information (bit start, end, | |
a0c8462f | 9064 | word size, etc) encoded within it.). */ |
d9352518 | 9065 | |
a0c8462f AM |
9066 | decode_complex_addend (&start, &oplen, &len, &wordsz, |
9067 | &chunksz, &lsb0_p, &signed_p, | |
9068 | &trunc_p, rel->r_addend); | |
d9352518 DB |
9069 | |
9070 | mask = (((1L << (len - 1)) - 1) << 1) | 1; | |
9071 | ||
9072 | if (lsb0_p) | |
9073 | shift = (start + 1) - len; | |
9074 | else | |
9075 | shift = (8 * wordsz) - (start + len); | |
9076 | ||
bb294208 AM |
9077 | octets = rel->r_offset * bfd_octets_per_byte (input_bfd, input_section); |
9078 | x = get_value (wordsz, chunksz, input_bfd, contents + octets); | |
d9352518 DB |
9079 | |
9080 | #ifdef DEBUG | |
9081 | printf ("Doing complex reloc: " | |
9082 | "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, " | |
9083 | "chunksz %ld, start %ld, len %ld, oplen %ld\n" | |
9084 | " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n", | |
9085 | lsb0_p, signed_p, trunc_p, wordsz, chunksz, start, len, | |
9ccb8af9 AM |
9086 | oplen, (unsigned long) x, (unsigned long) mask, |
9087 | (unsigned long) relocation); | |
d9352518 DB |
9088 | #endif |
9089 | ||
cdfeee4f | 9090 | r = bfd_reloc_ok; |
d9352518 | 9091 | if (! trunc_p) |
cdfeee4f AM |
9092 | /* Now do an overflow check. */ |
9093 | r = bfd_check_overflow ((signed_p | |
9094 | ? complain_overflow_signed | |
9095 | : complain_overflow_unsigned), | |
9096 | len, 0, (8 * wordsz), | |
9097 | relocation); | |
a0c8462f | 9098 | |
d9352518 DB |
9099 | /* Do the deed. */ |
9100 | x = (x & ~(mask << shift)) | ((relocation & mask) << shift); | |
9101 | ||
9102 | #ifdef DEBUG | |
9103 | printf (" relocation: %8.8lx\n" | |
9104 | " shifted mask: %8.8lx\n" | |
9105 | " shifted/masked reloc: %8.8lx\n" | |
9106 | " result: %8.8lx\n", | |
9ccb8af9 AM |
9107 | (unsigned long) relocation, (unsigned long) (mask << shift), |
9108 | (unsigned long) ((relocation & mask) << shift), (unsigned long) x); | |
d9352518 | 9109 | #endif |
bb294208 | 9110 | put_value (wordsz, chunksz, input_bfd, x, contents + octets); |
cdfeee4f | 9111 | return r; |
d9352518 DB |
9112 | } |
9113 | ||
0e287786 AM |
9114 | /* Functions to read r_offset from external (target order) reloc |
9115 | entry. Faster than bfd_getl32 et al, because we let the compiler | |
9116 | know the value is aligned. */ | |
53df40a4 | 9117 | |
0e287786 AM |
9118 | static bfd_vma |
9119 | ext32l_r_offset (const void *p) | |
53df40a4 AM |
9120 | { |
9121 | union aligned32 | |
9122 | { | |
9123 | uint32_t v; | |
9124 | unsigned char c[4]; | |
9125 | }; | |
9126 | const union aligned32 *a | |
0e287786 | 9127 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
9128 | |
9129 | uint32_t aval = ( (uint32_t) a->c[0] | |
9130 | | (uint32_t) a->c[1] << 8 | |
9131 | | (uint32_t) a->c[2] << 16 | |
9132 | | (uint32_t) a->c[3] << 24); | |
0e287786 | 9133 | return aval; |
53df40a4 AM |
9134 | } |
9135 | ||
0e287786 AM |
9136 | static bfd_vma |
9137 | ext32b_r_offset (const void *p) | |
53df40a4 AM |
9138 | { |
9139 | union aligned32 | |
9140 | { | |
9141 | uint32_t v; | |
9142 | unsigned char c[4]; | |
9143 | }; | |
9144 | const union aligned32 *a | |
0e287786 | 9145 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
9146 | |
9147 | uint32_t aval = ( (uint32_t) a->c[0] << 24 | |
9148 | | (uint32_t) a->c[1] << 16 | |
9149 | | (uint32_t) a->c[2] << 8 | |
9150 | | (uint32_t) a->c[3]); | |
0e287786 | 9151 | return aval; |
53df40a4 AM |
9152 | } |
9153 | ||
9154 | #ifdef BFD_HOST_64_BIT | |
0e287786 AM |
9155 | static bfd_vma |
9156 | ext64l_r_offset (const void *p) | |
53df40a4 AM |
9157 | { |
9158 | union aligned64 | |
9159 | { | |
9160 | uint64_t v; | |
9161 | unsigned char c[8]; | |
9162 | }; | |
9163 | const union aligned64 *a | |
0e287786 | 9164 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
9165 | |
9166 | uint64_t aval = ( (uint64_t) a->c[0] | |
9167 | | (uint64_t) a->c[1] << 8 | |
9168 | | (uint64_t) a->c[2] << 16 | |
9169 | | (uint64_t) a->c[3] << 24 | |
9170 | | (uint64_t) a->c[4] << 32 | |
9171 | | (uint64_t) a->c[5] << 40 | |
9172 | | (uint64_t) a->c[6] << 48 | |
9173 | | (uint64_t) a->c[7] << 56); | |
0e287786 | 9174 | return aval; |
53df40a4 AM |
9175 | } |
9176 | ||
0e287786 AM |
9177 | static bfd_vma |
9178 | ext64b_r_offset (const void *p) | |
53df40a4 AM |
9179 | { |
9180 | union aligned64 | |
9181 | { | |
9182 | uint64_t v; | |
9183 | unsigned char c[8]; | |
9184 | }; | |
9185 | const union aligned64 *a | |
0e287786 | 9186 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
9187 | |
9188 | uint64_t aval = ( (uint64_t) a->c[0] << 56 | |
9189 | | (uint64_t) a->c[1] << 48 | |
9190 | | (uint64_t) a->c[2] << 40 | |
9191 | | (uint64_t) a->c[3] << 32 | |
9192 | | (uint64_t) a->c[4] << 24 | |
9193 | | (uint64_t) a->c[5] << 16 | |
9194 | | (uint64_t) a->c[6] << 8 | |
9195 | | (uint64_t) a->c[7]); | |
0e287786 | 9196 | return aval; |
53df40a4 AM |
9197 | } |
9198 | #endif | |
9199 | ||
c152c796 AM |
9200 | /* When performing a relocatable link, the input relocations are |
9201 | preserved. But, if they reference global symbols, the indices | |
d4730f92 BS |
9202 | referenced must be updated. Update all the relocations found in |
9203 | RELDATA. */ | |
c152c796 | 9204 | |
0a1b45a2 | 9205 | static bool |
c152c796 | 9206 | elf_link_adjust_relocs (bfd *abfd, |
9eaff861 | 9207 | asection *sec, |
28dbcedc | 9208 | struct bfd_elf_section_reloc_data *reldata, |
0a1b45a2 | 9209 | bool sort, |
10bbbc1d | 9210 | struct bfd_link_info *info) |
c152c796 AM |
9211 | { |
9212 | unsigned int i; | |
9213 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
9214 | bfd_byte *erela; | |
9215 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); | |
9216 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
9217 | bfd_vma r_type_mask; | |
9218 | int r_sym_shift; | |
d4730f92 BS |
9219 | unsigned int count = reldata->count; |
9220 | struct elf_link_hash_entry **rel_hash = reldata->hashes; | |
c152c796 | 9221 | |
d4730f92 | 9222 | if (reldata->hdr->sh_entsize == bed->s->sizeof_rel) |
c152c796 AM |
9223 | { |
9224 | swap_in = bed->s->swap_reloc_in; | |
9225 | swap_out = bed->s->swap_reloc_out; | |
9226 | } | |
d4730f92 | 9227 | else if (reldata->hdr->sh_entsize == bed->s->sizeof_rela) |
c152c796 AM |
9228 | { |
9229 | swap_in = bed->s->swap_reloca_in; | |
9230 | swap_out = bed->s->swap_reloca_out; | |
9231 | } | |
9232 | else | |
9233 | abort (); | |
9234 | ||
9235 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
9236 | abort (); | |
9237 | ||
9238 | if (bed->s->arch_size == 32) | |
9239 | { | |
9240 | r_type_mask = 0xff; | |
9241 | r_sym_shift = 8; | |
9242 | } | |
9243 | else | |
9244 | { | |
9245 | r_type_mask = 0xffffffff; | |
9246 | r_sym_shift = 32; | |
9247 | } | |
9248 | ||
d4730f92 BS |
9249 | erela = reldata->hdr->contents; |
9250 | for (i = 0; i < count; i++, rel_hash++, erela += reldata->hdr->sh_entsize) | |
c152c796 AM |
9251 | { |
9252 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; | |
9253 | unsigned int j; | |
9254 | ||
9255 | if (*rel_hash == NULL) | |
9256 | continue; | |
9257 | ||
10bbbc1d NC |
9258 | if ((*rel_hash)->indx == -2 |
9259 | && info->gc_sections | |
9260 | && ! info->gc_keep_exported) | |
9261 | { | |
9262 | /* PR 21524: Let the user know if a symbol was removed by garbage collection. */ | |
9793eb77 | 9263 | _bfd_error_handler (_("%pB:%pA: error: relocation references symbol %s which was removed by garbage collection"), |
10bbbc1d NC |
9264 | abfd, sec, |
9265 | (*rel_hash)->root.root.string); | |
9793eb77 | 9266 | _bfd_error_handler (_("%pB:%pA: error: try relinking with --gc-keep-exported enabled"), |
d42c267e | 9267 | abfd, sec); |
10bbbc1d | 9268 | bfd_set_error (bfd_error_invalid_operation); |
0a1b45a2 | 9269 | return false; |
10bbbc1d | 9270 | } |
c152c796 AM |
9271 | BFD_ASSERT ((*rel_hash)->indx >= 0); |
9272 | ||
9273 | (*swap_in) (abfd, erela, irela); | |
9274 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
9275 | irela[j].r_info = ((bfd_vma) (*rel_hash)->indx << r_sym_shift | |
9276 | | (irela[j].r_info & r_type_mask)); | |
9277 | (*swap_out) (abfd, irela, erela); | |
9278 | } | |
53df40a4 | 9279 | |
9eaff861 AO |
9280 | if (bed->elf_backend_update_relocs) |
9281 | (*bed->elf_backend_update_relocs) (sec, reldata); | |
9282 | ||
0e287786 | 9283 | if (sort && count != 0) |
53df40a4 | 9284 | { |
0e287786 AM |
9285 | bfd_vma (*ext_r_off) (const void *); |
9286 | bfd_vma r_off; | |
9287 | size_t elt_size; | |
9288 | bfd_byte *base, *end, *p, *loc; | |
bca6d0e3 | 9289 | bfd_byte *buf = NULL; |
28dbcedc AM |
9290 | |
9291 | if (bed->s->arch_size == 32) | |
9292 | { | |
9293 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) | |
0e287786 | 9294 | ext_r_off = ext32l_r_offset; |
28dbcedc | 9295 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 9296 | ext_r_off = ext32b_r_offset; |
28dbcedc AM |
9297 | else |
9298 | abort (); | |
9299 | } | |
53df40a4 | 9300 | else |
28dbcedc | 9301 | { |
53df40a4 | 9302 | #ifdef BFD_HOST_64_BIT |
28dbcedc | 9303 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) |
0e287786 | 9304 | ext_r_off = ext64l_r_offset; |
28dbcedc | 9305 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 9306 | ext_r_off = ext64b_r_offset; |
28dbcedc | 9307 | else |
53df40a4 | 9308 | #endif |
28dbcedc AM |
9309 | abort (); |
9310 | } | |
0e287786 | 9311 | |
bca6d0e3 AM |
9312 | /* Must use a stable sort here. A modified insertion sort, |
9313 | since the relocs are mostly sorted already. */ | |
0e287786 AM |
9314 | elt_size = reldata->hdr->sh_entsize; |
9315 | base = reldata->hdr->contents; | |
9316 | end = base + count * elt_size; | |
bca6d0e3 | 9317 | if (elt_size > sizeof (Elf64_External_Rela)) |
0e287786 AM |
9318 | abort (); |
9319 | ||
9320 | /* Ensure the first element is lowest. This acts as a sentinel, | |
9321 | speeding the main loop below. */ | |
9322 | r_off = (*ext_r_off) (base); | |
9323 | for (p = loc = base; (p += elt_size) < end; ) | |
9324 | { | |
9325 | bfd_vma r_off2 = (*ext_r_off) (p); | |
9326 | if (r_off > r_off2) | |
9327 | { | |
9328 | r_off = r_off2; | |
9329 | loc = p; | |
9330 | } | |
9331 | } | |
9332 | if (loc != base) | |
9333 | { | |
9334 | /* Don't just swap *base and *loc as that changes the order | |
9335 | of the original base[0] and base[1] if they happen to | |
9336 | have the same r_offset. */ | |
bca6d0e3 AM |
9337 | bfd_byte onebuf[sizeof (Elf64_External_Rela)]; |
9338 | memcpy (onebuf, loc, elt_size); | |
0e287786 | 9339 | memmove (base + elt_size, base, loc - base); |
bca6d0e3 | 9340 | memcpy (base, onebuf, elt_size); |
0e287786 AM |
9341 | } |
9342 | ||
b29b8669 | 9343 | for (p = base + elt_size; (p += elt_size) < end; ) |
0e287786 AM |
9344 | { |
9345 | /* base to p is sorted, *p is next to insert. */ | |
9346 | r_off = (*ext_r_off) (p); | |
9347 | /* Search the sorted region for location to insert. */ | |
9348 | loc = p - elt_size; | |
9349 | while (r_off < (*ext_r_off) (loc)) | |
9350 | loc -= elt_size; | |
9351 | loc += elt_size; | |
9352 | if (loc != p) | |
9353 | { | |
bca6d0e3 AM |
9354 | /* Chances are there is a run of relocs to insert here, |
9355 | from one of more input files. Files are not always | |
9356 | linked in order due to the way elf_link_input_bfd is | |
9357 | called. See pr17666. */ | |
9358 | size_t sortlen = p - loc; | |
9359 | bfd_vma r_off2 = (*ext_r_off) (loc); | |
9360 | size_t runlen = elt_size; | |
9361 | size_t buf_size = 96 * 1024; | |
9362 | while (p + runlen < end | |
9363 | && (sortlen <= buf_size | |
9364 | || runlen + elt_size <= buf_size) | |
9365 | && r_off2 > (*ext_r_off) (p + runlen)) | |
9366 | runlen += elt_size; | |
9367 | if (buf == NULL) | |
9368 | { | |
9369 | buf = bfd_malloc (buf_size); | |
9370 | if (buf == NULL) | |
0a1b45a2 | 9371 | return false; |
bca6d0e3 AM |
9372 | } |
9373 | if (runlen < sortlen) | |
9374 | { | |
9375 | memcpy (buf, p, runlen); | |
9376 | memmove (loc + runlen, loc, sortlen); | |
9377 | memcpy (loc, buf, runlen); | |
9378 | } | |
9379 | else | |
9380 | { | |
9381 | memcpy (buf, loc, sortlen); | |
9382 | memmove (loc, p, runlen); | |
9383 | memcpy (loc + runlen, buf, sortlen); | |
9384 | } | |
b29b8669 | 9385 | p += runlen - elt_size; |
0e287786 AM |
9386 | } |
9387 | } | |
9388 | /* Hashes are no longer valid. */ | |
28dbcedc AM |
9389 | free (reldata->hashes); |
9390 | reldata->hashes = NULL; | |
bca6d0e3 | 9391 | free (buf); |
53df40a4 | 9392 | } |
0a1b45a2 | 9393 | return true; |
c152c796 AM |
9394 | } |
9395 | ||
9396 | struct elf_link_sort_rela | |
9397 | { | |
9398 | union { | |
9399 | bfd_vma offset; | |
9400 | bfd_vma sym_mask; | |
9401 | } u; | |
9402 | enum elf_reloc_type_class type; | |
9403 | /* We use this as an array of size int_rels_per_ext_rel. */ | |
9404 | Elf_Internal_Rela rela[1]; | |
9405 | }; | |
9406 | ||
dcea6a95 AM |
9407 | /* qsort stability here and for cmp2 is only an issue if multiple |
9408 | dynamic relocations are emitted at the same address. But targets | |
9409 | that apply a series of dynamic relocations each operating on the | |
9410 | result of the prior relocation can't use -z combreloc as | |
9411 | implemented anyway. Such schemes tend to be broken by sorting on | |
9412 | symbol index. That leaves dynamic NONE relocs as the only other | |
9413 | case where ld might emit multiple relocs at the same address, and | |
9414 | those are only emitted due to target bugs. */ | |
9415 | ||
c152c796 AM |
9416 | static int |
9417 | elf_link_sort_cmp1 (const void *A, const void *B) | |
9418 | { | |
a50b1753 NC |
9419 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
9420 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 AM |
9421 | int relativea, relativeb; |
9422 | ||
9423 | relativea = a->type == reloc_class_relative; | |
9424 | relativeb = b->type == reloc_class_relative; | |
9425 | ||
9426 | if (relativea < relativeb) | |
9427 | return 1; | |
9428 | if (relativea > relativeb) | |
9429 | return -1; | |
9430 | if ((a->rela->r_info & a->u.sym_mask) < (b->rela->r_info & b->u.sym_mask)) | |
9431 | return -1; | |
9432 | if ((a->rela->r_info & a->u.sym_mask) > (b->rela->r_info & b->u.sym_mask)) | |
9433 | return 1; | |
9434 | if (a->rela->r_offset < b->rela->r_offset) | |
9435 | return -1; | |
9436 | if (a->rela->r_offset > b->rela->r_offset) | |
9437 | return 1; | |
9438 | return 0; | |
9439 | } | |
9440 | ||
9441 | static int | |
9442 | elf_link_sort_cmp2 (const void *A, const void *B) | |
9443 | { | |
a50b1753 NC |
9444 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
9445 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 | 9446 | |
7e612e98 | 9447 | if (a->type < b->type) |
c152c796 | 9448 | return -1; |
7e612e98 | 9449 | if (a->type > b->type) |
c152c796 | 9450 | return 1; |
7e612e98 | 9451 | if (a->u.offset < b->u.offset) |
c152c796 | 9452 | return -1; |
7e612e98 | 9453 | if (a->u.offset > b->u.offset) |
c152c796 AM |
9454 | return 1; |
9455 | if (a->rela->r_offset < b->rela->r_offset) | |
9456 | return -1; | |
9457 | if (a->rela->r_offset > b->rela->r_offset) | |
9458 | return 1; | |
9459 | return 0; | |
9460 | } | |
9461 | ||
9462 | static size_t | |
9463 | elf_link_sort_relocs (bfd *abfd, struct bfd_link_info *info, asection **psec) | |
9464 | { | |
3410fea8 | 9465 | asection *dynamic_relocs; |
fc66a176 L |
9466 | asection *rela_dyn; |
9467 | asection *rel_dyn; | |
c152c796 AM |
9468 | bfd_size_type count, size; |
9469 | size_t i, ret, sort_elt, ext_size; | |
9470 | bfd_byte *sort, *s_non_relative, *p; | |
9471 | struct elf_link_sort_rela *sq; | |
9472 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
9473 | int i2e = bed->s->int_rels_per_ext_rel; | |
61826503 | 9474 | unsigned int opb = bfd_octets_per_byte (abfd, NULL); |
c152c796 AM |
9475 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
9476 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
9477 | struct bfd_link_order *lo; | |
9478 | bfd_vma r_sym_mask; | |
0a1b45a2 | 9479 | bool use_rela; |
c152c796 | 9480 | |
3410fea8 NC |
9481 | /* Find a dynamic reloc section. */ |
9482 | rela_dyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
9483 | rel_dyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
9484 | if (rela_dyn != NULL && rela_dyn->size > 0 | |
9485 | && rel_dyn != NULL && rel_dyn->size > 0) | |
c152c796 | 9486 | { |
0a1b45a2 | 9487 | bool use_rela_initialised = false; |
3410fea8 NC |
9488 | |
9489 | /* This is just here to stop gcc from complaining. | |
c8e44c6d | 9490 | Its initialization checking code is not perfect. */ |
0a1b45a2 | 9491 | use_rela = true; |
3410fea8 NC |
9492 | |
9493 | /* Both sections are present. Examine the sizes | |
9494 | of the indirect sections to help us choose. */ | |
9495 | for (lo = rela_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
9496 | if (lo->type == bfd_indirect_link_order) | |
9497 | { | |
9498 | asection *o = lo->u.indirect.section; | |
9499 | ||
9500 | if ((o->size % bed->s->sizeof_rela) == 0) | |
9501 | { | |
9502 | if ((o->size % bed->s->sizeof_rel) == 0) | |
9503 | /* Section size is divisible by both rel and rela sizes. | |
9504 | It is of no help to us. */ | |
9505 | ; | |
9506 | else | |
9507 | { | |
9508 | /* Section size is only divisible by rela. */ | |
535b785f | 9509 | if (use_rela_initialised && !use_rela) |
3410fea8 | 9510 | { |
9793eb77 | 9511 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d AM |
9512 | "they are in more than one size"), |
9513 | abfd); | |
3410fea8 NC |
9514 | bfd_set_error (bfd_error_invalid_operation); |
9515 | return 0; | |
9516 | } | |
9517 | else | |
9518 | { | |
0a1b45a2 AM |
9519 | use_rela = true; |
9520 | use_rela_initialised = true; | |
3410fea8 NC |
9521 | } |
9522 | } | |
9523 | } | |
9524 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
9525 | { | |
9526 | /* Section size is only divisible by rel. */ | |
535b785f | 9527 | if (use_rela_initialised && use_rela) |
3410fea8 | 9528 | { |
9793eb77 | 9529 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d AM |
9530 | "they are in more than one size"), |
9531 | abfd); | |
3410fea8 NC |
9532 | bfd_set_error (bfd_error_invalid_operation); |
9533 | return 0; | |
9534 | } | |
9535 | else | |
9536 | { | |
0a1b45a2 AM |
9537 | use_rela = false; |
9538 | use_rela_initialised = true; | |
3410fea8 NC |
9539 | } |
9540 | } | |
9541 | else | |
9542 | { | |
c8e44c6d AM |
9543 | /* The section size is not divisible by either - |
9544 | something is wrong. */ | |
9793eb77 | 9545 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d | 9546 | "they are of an unknown size"), abfd); |
3410fea8 NC |
9547 | bfd_set_error (bfd_error_invalid_operation); |
9548 | return 0; | |
9549 | } | |
9550 | } | |
9551 | ||
9552 | for (lo = rel_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
9553 | if (lo->type == bfd_indirect_link_order) | |
9554 | { | |
9555 | asection *o = lo->u.indirect.section; | |
9556 | ||
9557 | if ((o->size % bed->s->sizeof_rela) == 0) | |
9558 | { | |
9559 | if ((o->size % bed->s->sizeof_rel) == 0) | |
9560 | /* Section size is divisible by both rel and rela sizes. | |
9561 | It is of no help to us. */ | |
9562 | ; | |
9563 | else | |
9564 | { | |
9565 | /* Section size is only divisible by rela. */ | |
535b785f | 9566 | if (use_rela_initialised && !use_rela) |
3410fea8 | 9567 | { |
9793eb77 | 9568 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d AM |
9569 | "they are in more than one size"), |
9570 | abfd); | |
3410fea8 NC |
9571 | bfd_set_error (bfd_error_invalid_operation); |
9572 | return 0; | |
9573 | } | |
9574 | else | |
9575 | { | |
0a1b45a2 AM |
9576 | use_rela = true; |
9577 | use_rela_initialised = true; | |
3410fea8 NC |
9578 | } |
9579 | } | |
9580 | } | |
9581 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
9582 | { | |
9583 | /* Section size is only divisible by rel. */ | |
535b785f | 9584 | if (use_rela_initialised && use_rela) |
3410fea8 | 9585 | { |
9793eb77 | 9586 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d AM |
9587 | "they are in more than one size"), |
9588 | abfd); | |
3410fea8 NC |
9589 | bfd_set_error (bfd_error_invalid_operation); |
9590 | return 0; | |
9591 | } | |
9592 | else | |
9593 | { | |
0a1b45a2 AM |
9594 | use_rela = false; |
9595 | use_rela_initialised = true; | |
3410fea8 NC |
9596 | } |
9597 | } | |
9598 | else | |
9599 | { | |
c8e44c6d AM |
9600 | /* The section size is not divisible by either - |
9601 | something is wrong. */ | |
9793eb77 | 9602 | _bfd_error_handler (_("%pB: unable to sort relocs - " |
c8e44c6d | 9603 | "they are of an unknown size"), abfd); |
3410fea8 NC |
9604 | bfd_set_error (bfd_error_invalid_operation); |
9605 | return 0; | |
9606 | } | |
9607 | } | |
9608 | ||
9609 | if (! use_rela_initialised) | |
9610 | /* Make a guess. */ | |
0a1b45a2 | 9611 | use_rela = true; |
c152c796 | 9612 | } |
fc66a176 | 9613 | else if (rela_dyn != NULL && rela_dyn->size > 0) |
0a1b45a2 | 9614 | use_rela = true; |
fc66a176 | 9615 | else if (rel_dyn != NULL && rel_dyn->size > 0) |
0a1b45a2 | 9616 | use_rela = false; |
c152c796 | 9617 | else |
fc66a176 | 9618 | return 0; |
3410fea8 NC |
9619 | |
9620 | if (use_rela) | |
c152c796 | 9621 | { |
3410fea8 | 9622 | dynamic_relocs = rela_dyn; |
c152c796 AM |
9623 | ext_size = bed->s->sizeof_rela; |
9624 | swap_in = bed->s->swap_reloca_in; | |
9625 | swap_out = bed->s->swap_reloca_out; | |
9626 | } | |
3410fea8 NC |
9627 | else |
9628 | { | |
9629 | dynamic_relocs = rel_dyn; | |
9630 | ext_size = bed->s->sizeof_rel; | |
9631 | swap_in = bed->s->swap_reloc_in; | |
9632 | swap_out = bed->s->swap_reloc_out; | |
9633 | } | |
c152c796 AM |
9634 | |
9635 | size = 0; | |
3410fea8 | 9636 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 | 9637 | if (lo->type == bfd_indirect_link_order) |
3410fea8 | 9638 | size += lo->u.indirect.section->size; |
c152c796 | 9639 | |
3410fea8 | 9640 | if (size != dynamic_relocs->size) |
c152c796 AM |
9641 | return 0; |
9642 | ||
9643 | sort_elt = (sizeof (struct elf_link_sort_rela) | |
9644 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
3410fea8 NC |
9645 | |
9646 | count = dynamic_relocs->size / ext_size; | |
5e486aa1 NC |
9647 | if (count == 0) |
9648 | return 0; | |
a50b1753 | 9649 | sort = (bfd_byte *) bfd_zmalloc (sort_elt * count); |
3410fea8 | 9650 | |
c152c796 AM |
9651 | if (sort == NULL) |
9652 | { | |
9653 | (*info->callbacks->warning) | |
9793eb77 | 9654 | (info, _("not enough memory to sort relocations"), 0, abfd, 0, 0); |
c152c796 AM |
9655 | return 0; |
9656 | } | |
9657 | ||
9658 | if (bed->s->arch_size == 32) | |
9659 | r_sym_mask = ~(bfd_vma) 0xff; | |
9660 | else | |
9661 | r_sym_mask = ~(bfd_vma) 0xffffffff; | |
9662 | ||
3410fea8 | 9663 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
9664 | if (lo->type == bfd_indirect_link_order) |
9665 | { | |
9666 | bfd_byte *erel, *erelend; | |
9667 | asection *o = lo->u.indirect.section; | |
9668 | ||
1da212d6 AM |
9669 | if (o->contents == NULL && o->size != 0) |
9670 | { | |
9671 | /* This is a reloc section that is being handled as a normal | |
9672 | section. See bfd_section_from_shdr. We can't combine | |
9673 | relocs in this case. */ | |
9674 | free (sort); | |
9675 | return 0; | |
9676 | } | |
c152c796 | 9677 | erel = o->contents; |
eea6121a | 9678 | erelend = o->contents + o->size; |
c8e44c6d | 9679 | p = sort + o->output_offset * opb / ext_size * sort_elt; |
3410fea8 | 9680 | |
c152c796 AM |
9681 | while (erel < erelend) |
9682 | { | |
9683 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
3410fea8 | 9684 | |
c152c796 | 9685 | (*swap_in) (abfd, erel, s->rela); |
7e612e98 | 9686 | s->type = (*bed->elf_backend_reloc_type_class) (info, o, s->rela); |
c152c796 AM |
9687 | s->u.sym_mask = r_sym_mask; |
9688 | p += sort_elt; | |
9689 | erel += ext_size; | |
9690 | } | |
9691 | } | |
9692 | ||
9693 | qsort (sort, count, sort_elt, elf_link_sort_cmp1); | |
9694 | ||
9695 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
9696 | { | |
9697 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
9698 | if (s->type != reloc_class_relative) | |
9699 | break; | |
9700 | } | |
9701 | ret = i; | |
9702 | s_non_relative = p; | |
9703 | ||
9704 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
9705 | for (; i < count; i++, p += sort_elt) | |
9706 | { | |
9707 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
9708 | if (((sp->rela->r_info ^ sq->rela->r_info) & r_sym_mask) != 0) | |
9709 | sq = sp; | |
9710 | sp->u.offset = sq->rela->r_offset; | |
9711 | } | |
9712 | ||
9713 | qsort (s_non_relative, count - ret, sort_elt, elf_link_sort_cmp2); | |
9714 | ||
c8e44c6d AM |
9715 | struct elf_link_hash_table *htab = elf_hash_table (info); |
9716 | if (htab->srelplt && htab->srelplt->output_section == dynamic_relocs) | |
9717 | { | |
9718 | /* We have plt relocs in .rela.dyn. */ | |
9719 | sq = (struct elf_link_sort_rela *) sort; | |
9720 | for (i = 0; i < count; i++) | |
9721 | if (sq[count - i - 1].type != reloc_class_plt) | |
9722 | break; | |
9723 | if (i != 0 && htab->srelplt->size == i * ext_size) | |
9724 | { | |
9725 | struct bfd_link_order **plo; | |
9726 | /* Put srelplt link_order last. This is so the output_offset | |
9727 | set in the next loop is correct for DT_JMPREL. */ | |
9728 | for (plo = &dynamic_relocs->map_head.link_order; *plo != NULL; ) | |
9729 | if ((*plo)->type == bfd_indirect_link_order | |
9730 | && (*plo)->u.indirect.section == htab->srelplt) | |
9731 | { | |
9732 | lo = *plo; | |
9733 | *plo = lo->next; | |
9734 | } | |
9735 | else | |
9736 | plo = &(*plo)->next; | |
9737 | *plo = lo; | |
9738 | lo->next = NULL; | |
9739 | dynamic_relocs->map_tail.link_order = lo; | |
9740 | } | |
9741 | } | |
9742 | ||
9743 | p = sort; | |
3410fea8 | 9744 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
9745 | if (lo->type == bfd_indirect_link_order) |
9746 | { | |
9747 | bfd_byte *erel, *erelend; | |
9748 | asection *o = lo->u.indirect.section; | |
9749 | ||
9750 | erel = o->contents; | |
eea6121a | 9751 | erelend = o->contents + o->size; |
c8e44c6d | 9752 | o->output_offset = (p - sort) / sort_elt * ext_size / opb; |
c152c796 AM |
9753 | while (erel < erelend) |
9754 | { | |
9755 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
9756 | (*swap_out) (abfd, s->rela, erel); | |
9757 | p += sort_elt; | |
9758 | erel += ext_size; | |
9759 | } | |
9760 | } | |
9761 | ||
9762 | free (sort); | |
3410fea8 | 9763 | *psec = dynamic_relocs; |
c152c796 AM |
9764 | return ret; |
9765 | } | |
9766 | ||
ef10c3ac | 9767 | /* Add a symbol to the output symbol string table. */ |
c152c796 | 9768 | |
6e0b88f1 | 9769 | static int |
37bb890f | 9770 | elf_link_output_symstrtab (void *finf, |
ef10c3ac L |
9771 | const char *name, |
9772 | Elf_Internal_Sym *elfsym, | |
9773 | asection *input_sec, | |
9774 | struct elf_link_hash_entry *h) | |
c152c796 | 9775 | { |
37bb890f | 9776 | struct elf_final_link_info *flinfo = finf; |
6e0b88f1 | 9777 | int (*output_symbol_hook) |
c152c796 AM |
9778 | (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *, |
9779 | struct elf_link_hash_entry *); | |
ef10c3ac | 9780 | struct elf_link_hash_table *hash_table; |
c152c796 | 9781 | const struct elf_backend_data *bed; |
ef10c3ac | 9782 | bfd_size_type strtabsize; |
c152c796 | 9783 | |
8539e4e8 AM |
9784 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); |
9785 | ||
8b127cbc | 9786 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 AM |
9787 | output_symbol_hook = bed->elf_backend_link_output_symbol_hook; |
9788 | if (output_symbol_hook != NULL) | |
9789 | { | |
8b127cbc | 9790 | int ret = (*output_symbol_hook) (flinfo->info, name, elfsym, input_sec, h); |
6e0b88f1 AM |
9791 | if (ret != 1) |
9792 | return ret; | |
c152c796 AM |
9793 | } |
9794 | ||
06f44071 AM |
9795 | if (ELF_ST_TYPE (elfsym->st_info) == STT_GNU_IFUNC) |
9796 | elf_tdata (flinfo->output_bfd)->has_gnu_osabi |= elf_gnu_osabi_ifunc; | |
9797 | if (ELF_ST_BIND (elfsym->st_info) == STB_GNU_UNIQUE) | |
9798 | elf_tdata (flinfo->output_bfd)->has_gnu_osabi |= elf_gnu_osabi_unique; | |
9799 | ||
ef10c3ac L |
9800 | if (name == NULL |
9801 | || *name == '\0' | |
9802 | || (input_sec->flags & SEC_EXCLUDE)) | |
9803 | elfsym->st_name = (unsigned long) -1; | |
c152c796 AM |
9804 | else |
9805 | { | |
ef10c3ac L |
9806 | /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize |
9807 | to get the final offset for st_name. */ | |
3f2e9699 | 9808 | char *versioned_name = (char *) name; |
496afd17 L |
9809 | if (h != NULL) |
9810 | { | |
9811 | if (h->versioned == versioned && h->def_dynamic) | |
9812 | { | |
9813 | /* Keep only one '@' for versioned symbols defined in | |
9814 | shared objects. */ | |
9815 | char *version = strrchr (name, ELF_VER_CHR); | |
9816 | char *base_end = strchr (name, ELF_VER_CHR); | |
9817 | if (version != base_end) | |
9818 | { | |
9819 | size_t base_len; | |
9820 | size_t len = strlen (name); | |
9821 | versioned_name = bfd_alloc (flinfo->output_bfd, len); | |
9822 | if (versioned_name == NULL) | |
9823 | return 0; | |
9824 | base_len = base_end - name; | |
9825 | memcpy (versioned_name, name, base_len); | |
9826 | memcpy (versioned_name + base_len, version, | |
9827 | len - base_len); | |
9828 | } | |
9829 | } | |
9830 | } | |
9831 | else if (flinfo->info->unique_symbol | |
9832 | && ELF_ST_BIND (elfsym->st_info) == STB_LOCAL) | |
3f2e9699 | 9833 | { |
496afd17 L |
9834 | struct local_hash_entry *lh; |
9835 | switch (ELF_ST_TYPE (elfsym->st_info)) | |
3f2e9699 | 9836 | { |
496afd17 L |
9837 | case STT_FILE: |
9838 | case STT_SECTION: | |
9839 | break; | |
9840 | default: | |
9841 | lh = (struct local_hash_entry *) bfd_hash_lookup | |
0a1b45a2 | 9842 | (&flinfo->local_hash_table, name, true, false); |
496afd17 | 9843 | if (lh == NULL) |
3f2e9699 | 9844 | return 0; |
496afd17 L |
9845 | if (lh->count) |
9846 | { | |
9847 | /* Append ".COUNT" to duplicated local symbols. */ | |
9848 | size_t count_len; | |
9849 | size_t base_len = lh->size; | |
9850 | char buf[30]; | |
9851 | sprintf (buf, "%lx", lh->count); | |
9852 | if (!base_len) | |
9853 | { | |
9854 | base_len = strlen (name); | |
9855 | lh->size = base_len; | |
9856 | } | |
9857 | count_len = strlen (buf); | |
9858 | versioned_name = bfd_alloc (flinfo->output_bfd, | |
9859 | base_len + count_len + 2); | |
9860 | if (versioned_name == NULL) | |
9861 | return 0; | |
9862 | memcpy (versioned_name, name, base_len); | |
9863 | versioned_name[base_len] = '.'; | |
9864 | memcpy (versioned_name + base_len + 1, buf, | |
9865 | count_len + 1); | |
9866 | } | |
9867 | lh->count++; | |
9868 | break; | |
3f2e9699 L |
9869 | } |
9870 | } | |
ef10c3ac L |
9871 | elfsym->st_name |
9872 | = (unsigned long) _bfd_elf_strtab_add (flinfo->symstrtab, | |
0a1b45a2 | 9873 | versioned_name, false); |
c152c796 | 9874 | if (elfsym->st_name == (unsigned long) -1) |
6e0b88f1 | 9875 | return 0; |
c152c796 AM |
9876 | } |
9877 | ||
ef10c3ac L |
9878 | hash_table = elf_hash_table (flinfo->info); |
9879 | strtabsize = hash_table->strtabsize; | |
9880 | if (strtabsize <= hash_table->strtabcount) | |
c152c796 | 9881 | { |
ef10c3ac L |
9882 | strtabsize += strtabsize; |
9883 | hash_table->strtabsize = strtabsize; | |
9884 | strtabsize *= sizeof (*hash_table->strtab); | |
9885 | hash_table->strtab | |
9886 | = (struct elf_sym_strtab *) bfd_realloc (hash_table->strtab, | |
9887 | strtabsize); | |
9888 | if (hash_table->strtab == NULL) | |
6e0b88f1 | 9889 | return 0; |
c152c796 | 9890 | } |
ef10c3ac L |
9891 | hash_table->strtab[hash_table->strtabcount].sym = *elfsym; |
9892 | hash_table->strtab[hash_table->strtabcount].dest_index | |
9893 | = hash_table->strtabcount; | |
9894 | hash_table->strtab[hash_table->strtabcount].destshndx_index | |
9895 | = flinfo->symshndxbuf ? bfd_get_symcount (flinfo->output_bfd) : 0; | |
9896 | ||
ed48ec2e | 9897 | flinfo->output_bfd->symcount += 1; |
ef10c3ac L |
9898 | hash_table->strtabcount += 1; |
9899 | ||
9900 | return 1; | |
9901 | } | |
9902 | ||
9903 | /* Swap symbols out to the symbol table and flush the output symbols to | |
9904 | the file. */ | |
9905 | ||
0a1b45a2 | 9906 | static bool |
ef10c3ac L |
9907 | elf_link_swap_symbols_out (struct elf_final_link_info *flinfo) |
9908 | { | |
9909 | struct elf_link_hash_table *hash_table = elf_hash_table (flinfo->info); | |
986f0783 | 9910 | size_t amt; |
ef53be89 | 9911 | size_t i; |
ef10c3ac L |
9912 | const struct elf_backend_data *bed; |
9913 | bfd_byte *symbuf; | |
9914 | Elf_Internal_Shdr *hdr; | |
9915 | file_ptr pos; | |
0a1b45a2 | 9916 | bool ret; |
ef10c3ac L |
9917 | |
9918 | if (!hash_table->strtabcount) | |
0a1b45a2 | 9919 | return true; |
ef10c3ac L |
9920 | |
9921 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); | |
9922 | ||
9923 | bed = get_elf_backend_data (flinfo->output_bfd); | |
c152c796 | 9924 | |
ef10c3ac L |
9925 | amt = bed->s->sizeof_sym * hash_table->strtabcount; |
9926 | symbuf = (bfd_byte *) bfd_malloc (amt); | |
9927 | if (symbuf == NULL) | |
0a1b45a2 | 9928 | return false; |
1b786873 | 9929 | |
ef10c3ac | 9930 | if (flinfo->symshndxbuf) |
c152c796 | 9931 | { |
ef53be89 AM |
9932 | amt = sizeof (Elf_External_Sym_Shndx); |
9933 | amt *= bfd_get_symcount (flinfo->output_bfd); | |
ef10c3ac L |
9934 | flinfo->symshndxbuf = (Elf_External_Sym_Shndx *) bfd_zmalloc (amt); |
9935 | if (flinfo->symshndxbuf == NULL) | |
c152c796 | 9936 | { |
ef10c3ac | 9937 | free (symbuf); |
0a1b45a2 | 9938 | return false; |
c152c796 | 9939 | } |
c152c796 AM |
9940 | } |
9941 | ||
3d16b64e | 9942 | /* Now swap out the symbols. */ |
ef10c3ac L |
9943 | for (i = 0; i < hash_table->strtabcount; i++) |
9944 | { | |
9945 | struct elf_sym_strtab *elfsym = &hash_table->strtab[i]; | |
9946 | if (elfsym->sym.st_name == (unsigned long) -1) | |
9947 | elfsym->sym.st_name = 0; | |
9948 | else | |
9949 | elfsym->sym.st_name | |
9950 | = (unsigned long) _bfd_elf_strtab_offset (flinfo->symstrtab, | |
9951 | elfsym->sym.st_name); | |
3d16b64e NA |
9952 | |
9953 | /* Inform the linker of the addition of this symbol. */ | |
9954 | ||
9955 | if (flinfo->info->callbacks->ctf_new_symbol) | |
9956 | flinfo->info->callbacks->ctf_new_symbol (elfsym->dest_index, | |
9957 | &elfsym->sym); | |
9958 | ||
ef10c3ac L |
9959 | bed->s->swap_symbol_out (flinfo->output_bfd, &elfsym->sym, |
9960 | ((bfd_byte *) symbuf | |
9961 | + (elfsym->dest_index | |
9962 | * bed->s->sizeof_sym)), | |
9963 | (flinfo->symshndxbuf | |
9964 | + elfsym->destshndx_index)); | |
9965 | } | |
9966 | ||
9967 | hdr = &elf_tdata (flinfo->output_bfd)->symtab_hdr; | |
9968 | pos = hdr->sh_offset + hdr->sh_size; | |
9969 | amt = hash_table->strtabcount * bed->s->sizeof_sym; | |
9970 | if (bfd_seek (flinfo->output_bfd, pos, SEEK_SET) == 0 | |
9971 | && bfd_bwrite (symbuf, amt, flinfo->output_bfd) == amt) | |
9972 | { | |
9973 | hdr->sh_size += amt; | |
0a1b45a2 | 9974 | ret = true; |
ef10c3ac L |
9975 | } |
9976 | else | |
0a1b45a2 | 9977 | ret = false; |
c152c796 | 9978 | |
ef10c3ac L |
9979 | free (symbuf); |
9980 | ||
9981 | free (hash_table->strtab); | |
9982 | hash_table->strtab = NULL; | |
9983 | ||
9984 | return ret; | |
c152c796 AM |
9985 | } |
9986 | ||
c0d5a53d L |
9987 | /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */ |
9988 | ||
0a1b45a2 | 9989 | static bool |
c0d5a53d L |
9990 | check_dynsym (bfd *abfd, Elf_Internal_Sym *sym) |
9991 | { | |
4fbb74a6 AM |
9992 | if (sym->st_shndx >= (SHN_LORESERVE & 0xffff) |
9993 | && sym->st_shndx < SHN_LORESERVE) | |
c0d5a53d L |
9994 | { |
9995 | /* The gABI doesn't support dynamic symbols in output sections | |
a0c8462f | 9996 | beyond 64k. */ |
4eca0228 | 9997 | _bfd_error_handler |
695344c0 | 9998 | /* xgettext:c-format */ |
9793eb77 | 9999 | (_("%pB: too many sections: %d (>= %d)"), |
4fbb74a6 | 10000 | abfd, bfd_count_sections (abfd), SHN_LORESERVE & 0xffff); |
c0d5a53d | 10001 | bfd_set_error (bfd_error_nonrepresentable_section); |
0a1b45a2 | 10002 | return false; |
c0d5a53d | 10003 | } |
0a1b45a2 | 10004 | return true; |
c0d5a53d L |
10005 | } |
10006 | ||
c152c796 AM |
10007 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
10008 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
10009 | versioned symbol that would normally require an explicit version. | |
10010 | We also handle the case that a DSO references a hidden symbol | |
10011 | which may be satisfied by a versioned symbol in another DSO. */ | |
10012 | ||
0a1b45a2 | 10013 | static bool |
c152c796 AM |
10014 | elf_link_check_versioned_symbol (struct bfd_link_info *info, |
10015 | const struct elf_backend_data *bed, | |
10016 | struct elf_link_hash_entry *h) | |
10017 | { | |
10018 | bfd *abfd; | |
10019 | struct elf_link_loaded_list *loaded; | |
10020 | ||
10021 | if (!is_elf_hash_table (info->hash)) | |
0a1b45a2 | 10022 | return false; |
c152c796 | 10023 | |
90c984fc L |
10024 | /* Check indirect symbol. */ |
10025 | while (h->root.type == bfd_link_hash_indirect) | |
10026 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10027 | ||
c152c796 AM |
10028 | switch (h->root.type) |
10029 | { | |
10030 | default: | |
10031 | abfd = NULL; | |
10032 | break; | |
10033 | ||
10034 | case bfd_link_hash_undefined: | |
10035 | case bfd_link_hash_undefweak: | |
10036 | abfd = h->root.u.undef.abfd; | |
f4ab0e2d L |
10037 | if (abfd == NULL |
10038 | || (abfd->flags & DYNAMIC) == 0 | |
e56f61be | 10039 | || (elf_dyn_lib_class (abfd) & DYN_DT_NEEDED) == 0) |
0a1b45a2 | 10040 | return false; |
c152c796 AM |
10041 | break; |
10042 | ||
10043 | case bfd_link_hash_defined: | |
10044 | case bfd_link_hash_defweak: | |
10045 | abfd = h->root.u.def.section->owner; | |
10046 | break; | |
10047 | ||
10048 | case bfd_link_hash_common: | |
10049 | abfd = h->root.u.c.p->section->owner; | |
10050 | break; | |
10051 | } | |
10052 | BFD_ASSERT (abfd != NULL); | |
10053 | ||
e310298c | 10054 | for (loaded = elf_hash_table (info)->dyn_loaded; |
c152c796 AM |
10055 | loaded != NULL; |
10056 | loaded = loaded->next) | |
10057 | { | |
10058 | bfd *input; | |
10059 | Elf_Internal_Shdr *hdr; | |
ef53be89 AM |
10060 | size_t symcount; |
10061 | size_t extsymcount; | |
10062 | size_t extsymoff; | |
c152c796 AM |
10063 | Elf_Internal_Shdr *versymhdr; |
10064 | Elf_Internal_Sym *isym; | |
10065 | Elf_Internal_Sym *isymend; | |
10066 | Elf_Internal_Sym *isymbuf; | |
10067 | Elf_External_Versym *ever; | |
10068 | Elf_External_Versym *extversym; | |
10069 | ||
10070 | input = loaded->abfd; | |
10071 | ||
10072 | /* We check each DSO for a possible hidden versioned definition. */ | |
10073 | if (input == abfd | |
c152c796 AM |
10074 | || elf_dynversym (input) == 0) |
10075 | continue; | |
10076 | ||
10077 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
10078 | ||
10079 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
10080 | if (elf_bad_symtab (input)) | |
10081 | { | |
10082 | extsymcount = symcount; | |
10083 | extsymoff = 0; | |
10084 | } | |
10085 | else | |
10086 | { | |
10087 | extsymcount = symcount - hdr->sh_info; | |
10088 | extsymoff = hdr->sh_info; | |
10089 | } | |
10090 | ||
10091 | if (extsymcount == 0) | |
10092 | continue; | |
10093 | ||
10094 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, | |
10095 | NULL, NULL, NULL); | |
10096 | if (isymbuf == NULL) | |
0a1b45a2 | 10097 | return false; |
c152c796 AM |
10098 | |
10099 | /* Read in any version definitions. */ | |
10100 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
c152c796 | 10101 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 |
2bb3687b AM |
10102 | || (extversym = (Elf_External_Versym *) |
10103 | _bfd_malloc_and_read (input, versymhdr->sh_size, | |
10104 | versymhdr->sh_size)) == NULL) | |
c152c796 | 10105 | { |
c152c796 | 10106 | free (isymbuf); |
0a1b45a2 | 10107 | return false; |
c152c796 AM |
10108 | } |
10109 | ||
10110 | ever = extversym + extsymoff; | |
10111 | isymend = isymbuf + extsymcount; | |
10112 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
10113 | { | |
10114 | const char *name; | |
10115 | Elf_Internal_Versym iver; | |
10116 | unsigned short version_index; | |
10117 | ||
10118 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL | |
10119 | || isym->st_shndx == SHN_UNDEF) | |
10120 | continue; | |
10121 | ||
10122 | name = bfd_elf_string_from_elf_section (input, | |
10123 | hdr->sh_link, | |
10124 | isym->st_name); | |
10125 | if (strcmp (name, h->root.root.string) != 0) | |
10126 | continue; | |
10127 | ||
10128 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
10129 | ||
d023c380 L |
10130 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 |
10131 | && !(h->def_regular | |
10132 | && h->forced_local)) | |
c152c796 AM |
10133 | { |
10134 | /* If we have a non-hidden versioned sym, then it should | |
d023c380 L |
10135 | have provided a definition for the undefined sym unless |
10136 | it is defined in a non-shared object and forced local. | |
10137 | */ | |
c152c796 AM |
10138 | abort (); |
10139 | } | |
10140 | ||
10141 | version_index = iver.vs_vers & VERSYM_VERSION; | |
10142 | if (version_index == 1 || version_index == 2) | |
10143 | { | |
10144 | /* This is the base or first version. We can use it. */ | |
10145 | free (extversym); | |
10146 | free (isymbuf); | |
0a1b45a2 | 10147 | return true; |
c152c796 AM |
10148 | } |
10149 | } | |
10150 | ||
10151 | free (extversym); | |
10152 | free (isymbuf); | |
10153 | } | |
10154 | ||
0a1b45a2 | 10155 | return false; |
c152c796 AM |
10156 | } |
10157 | ||
b8871f35 L |
10158 | /* Convert ELF common symbol TYPE. */ |
10159 | ||
10160 | static int | |
10161 | elf_link_convert_common_type (struct bfd_link_info *info, int type) | |
10162 | { | |
10163 | /* Commom symbol can only appear in relocatable link. */ | |
10164 | if (!bfd_link_relocatable (info)) | |
10165 | abort (); | |
10166 | switch (info->elf_stt_common) | |
10167 | { | |
10168 | case unchanged: | |
10169 | break; | |
10170 | case elf_stt_common: | |
10171 | type = STT_COMMON; | |
10172 | break; | |
10173 | case no_elf_stt_common: | |
10174 | type = STT_OBJECT; | |
10175 | break; | |
10176 | } | |
10177 | return type; | |
10178 | } | |
10179 | ||
c152c796 AM |
10180 | /* Add an external symbol to the symbol table. This is called from |
10181 | the hash table traversal routine. When generating a shared object, | |
10182 | we go through the symbol table twice. The first time we output | |
10183 | anything that might have been forced to local scope in a version | |
10184 | script. The second time we output the symbols that are still | |
10185 | global symbols. */ | |
10186 | ||
0a1b45a2 | 10187 | static bool |
7686d77d | 10188 | elf_link_output_extsym (struct bfd_hash_entry *bh, void *data) |
c152c796 | 10189 | { |
7686d77d | 10190 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; |
a50b1753 | 10191 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; |
8b127cbc | 10192 | struct elf_final_link_info *flinfo = eoinfo->flinfo; |
0a1b45a2 | 10193 | bool strip; |
c152c796 AM |
10194 | Elf_Internal_Sym sym; |
10195 | asection *input_sec; | |
10196 | const struct elf_backend_data *bed; | |
6e0b88f1 AM |
10197 | long indx; |
10198 | int ret; | |
b8871f35 | 10199 | unsigned int type; |
c152c796 AM |
10200 | |
10201 | if (h->root.type == bfd_link_hash_warning) | |
10202 | { | |
10203 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10204 | if (h->root.type == bfd_link_hash_new) | |
0a1b45a2 | 10205 | return true; |
c152c796 AM |
10206 | } |
10207 | ||
10208 | /* Decide whether to output this symbol in this pass. */ | |
10209 | if (eoinfo->localsyms) | |
10210 | { | |
4deb8f71 | 10211 | if (!h->forced_local) |
0a1b45a2 | 10212 | return true; |
c152c796 AM |
10213 | } |
10214 | else | |
10215 | { | |
4deb8f71 | 10216 | if (h->forced_local) |
0a1b45a2 | 10217 | return true; |
c152c796 AM |
10218 | } |
10219 | ||
8b127cbc | 10220 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 | 10221 | |
12ac1cf5 | 10222 | if (h->root.type == bfd_link_hash_undefined) |
c152c796 | 10223 | { |
12ac1cf5 NC |
10224 | /* If we have an undefined symbol reference here then it must have |
10225 | come from a shared library that is being linked in. (Undefined | |
98da7939 L |
10226 | references in regular files have already been handled unless |
10227 | they are in unreferenced sections which are removed by garbage | |
10228 | collection). */ | |
0a1b45a2 | 10229 | bool ignore_undef = false; |
12ac1cf5 NC |
10230 | |
10231 | /* Some symbols may be special in that the fact that they're | |
10232 | undefined can be safely ignored - let backend determine that. */ | |
10233 | if (bed->elf_backend_ignore_undef_symbol) | |
10234 | ignore_undef = bed->elf_backend_ignore_undef_symbol (h); | |
10235 | ||
10236 | /* If we are reporting errors for this situation then do so now. */ | |
89a2ee5a | 10237 | if (!ignore_undef |
c54f1524 | 10238 | && h->ref_dynamic_nonweak |
8b127cbc AM |
10239 | && (!h->ref_regular || flinfo->info->gc_sections) |
10240 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h) | |
10241 | && flinfo->info->unresolved_syms_in_shared_libs != RM_IGNORE) | |
95a51568 FS |
10242 | { |
10243 | flinfo->info->callbacks->undefined_symbol | |
10244 | (flinfo->info, h->root.root.string, | |
10245 | h->ref_regular ? NULL : h->root.u.undef.abfd, NULL, 0, | |
10246 | flinfo->info->unresolved_syms_in_shared_libs == RM_DIAGNOSE | |
10247 | && !flinfo->info->warn_unresolved_syms); | |
10248 | } | |
97196564 L |
10249 | |
10250 | /* Strip a global symbol defined in a discarded section. */ | |
10251 | if (h->indx == -3) | |
0a1b45a2 | 10252 | return true; |
c152c796 AM |
10253 | } |
10254 | ||
10255 | /* We should also warn if a forced local symbol is referenced from | |
10256 | shared libraries. */ | |
0e1862bb | 10257 | if (bfd_link_executable (flinfo->info) |
f5385ebf AM |
10258 | && h->forced_local |
10259 | && h->ref_dynamic | |
371a5866 | 10260 | && h->def_regular |
f5385ebf | 10261 | && !h->dynamic_def |
ee659f1f | 10262 | && h->ref_dynamic_nonweak |
8b127cbc | 10263 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h)) |
c152c796 | 10264 | { |
17d078c5 AM |
10265 | bfd *def_bfd; |
10266 | const char *msg; | |
90c984fc L |
10267 | struct elf_link_hash_entry *hi = h; |
10268 | ||
10269 | /* Check indirect symbol. */ | |
10270 | while (hi->root.type == bfd_link_hash_indirect) | |
10271 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
17d078c5 AM |
10272 | |
10273 | if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
695344c0 | 10274 | /* xgettext:c-format */ |
871b3ab2 | 10275 | msg = _("%pB: internal symbol `%s' in %pB is referenced by DSO"); |
17d078c5 | 10276 | else if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) |
695344c0 | 10277 | /* xgettext:c-format */ |
871b3ab2 | 10278 | msg = _("%pB: hidden symbol `%s' in %pB is referenced by DSO"); |
17d078c5 | 10279 | else |
695344c0 | 10280 | /* xgettext:c-format */ |
871b3ab2 | 10281 | msg = _("%pB: local symbol `%s' in %pB is referenced by DSO"); |
8b127cbc | 10282 | def_bfd = flinfo->output_bfd; |
90c984fc L |
10283 | if (hi->root.u.def.section != bfd_abs_section_ptr) |
10284 | def_bfd = hi->root.u.def.section->owner; | |
c08bb8dd AM |
10285 | _bfd_error_handler (msg, flinfo->output_bfd, |
10286 | h->root.root.string, def_bfd); | |
17d078c5 | 10287 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 AM |
10288 | eoinfo->failed = true; |
10289 | return false; | |
c152c796 AM |
10290 | } |
10291 | ||
10292 | /* We don't want to output symbols that have never been mentioned by | |
10293 | a regular file, or that we have been told to strip. However, if | |
10294 | h->indx is set to -2, the symbol is used by a reloc and we must | |
10295 | output it. */ | |
0a1b45a2 | 10296 | strip = false; |
c152c796 | 10297 | if (h->indx == -2) |
d983c8c5 | 10298 | ; |
f5385ebf | 10299 | else if ((h->def_dynamic |
77cfaee6 AM |
10300 | || h->ref_dynamic |
10301 | || h->root.type == bfd_link_hash_new) | |
f5385ebf AM |
10302 | && !h->def_regular |
10303 | && !h->ref_regular) | |
0a1b45a2 | 10304 | strip = true; |
8b127cbc | 10305 | else if (flinfo->info->strip == strip_all) |
0a1b45a2 | 10306 | strip = true; |
8b127cbc AM |
10307 | else if (flinfo->info->strip == strip_some |
10308 | && bfd_hash_lookup (flinfo->info->keep_hash, | |
0a1b45a2 AM |
10309 | h->root.root.string, false, false) == NULL) |
10310 | strip = true; | |
d56d55e7 AM |
10311 | else if ((h->root.type == bfd_link_hash_defined |
10312 | || h->root.type == bfd_link_hash_defweak) | |
8b127cbc | 10313 | && ((flinfo->info->strip_discarded |
dbaa2011 | 10314 | && discarded_section (h->root.u.def.section)) |
ca4be51c AM |
10315 | || ((h->root.u.def.section->flags & SEC_LINKER_CREATED) == 0 |
10316 | && h->root.u.def.section->owner != NULL | |
d56d55e7 | 10317 | && (h->root.u.def.section->owner->flags & BFD_PLUGIN) != 0))) |
0a1b45a2 | 10318 | strip = true; |
9e2278f5 AM |
10319 | else if ((h->root.type == bfd_link_hash_undefined |
10320 | || h->root.type == bfd_link_hash_undefweak) | |
10321 | && h->root.u.undef.abfd != NULL | |
10322 | && (h->root.u.undef.abfd->flags & BFD_PLUGIN) != 0) | |
0a1b45a2 | 10323 | strip = true; |
c152c796 | 10324 | |
b8871f35 L |
10325 | type = h->type; |
10326 | ||
c152c796 | 10327 | /* If we're stripping it, and it's not a dynamic symbol, there's |
d983c8c5 AM |
10328 | nothing else to do. However, if it is a forced local symbol or |
10329 | an ifunc symbol we need to give the backend finish_dynamic_symbol | |
10330 | function a chance to make it dynamic. */ | |
c152c796 AM |
10331 | if (strip |
10332 | && h->dynindx == -1 | |
b8871f35 | 10333 | && type != STT_GNU_IFUNC |
f5385ebf | 10334 | && !h->forced_local) |
0a1b45a2 | 10335 | return true; |
c152c796 AM |
10336 | |
10337 | sym.st_value = 0; | |
10338 | sym.st_size = h->size; | |
10339 | sym.st_other = h->other; | |
c152c796 AM |
10340 | switch (h->root.type) |
10341 | { | |
10342 | default: | |
10343 | case bfd_link_hash_new: | |
10344 | case bfd_link_hash_warning: | |
10345 | abort (); | |
0a1b45a2 | 10346 | return false; |
c152c796 AM |
10347 | |
10348 | case bfd_link_hash_undefined: | |
10349 | case bfd_link_hash_undefweak: | |
10350 | input_sec = bfd_und_section_ptr; | |
10351 | sym.st_shndx = SHN_UNDEF; | |
10352 | break; | |
10353 | ||
10354 | case bfd_link_hash_defined: | |
10355 | case bfd_link_hash_defweak: | |
10356 | { | |
10357 | input_sec = h->root.u.def.section; | |
10358 | if (input_sec->output_section != NULL) | |
10359 | { | |
10360 | sym.st_shndx = | |
8b127cbc | 10361 | _bfd_elf_section_from_bfd_section (flinfo->output_bfd, |
c152c796 AM |
10362 | input_sec->output_section); |
10363 | if (sym.st_shndx == SHN_BAD) | |
10364 | { | |
4eca0228 | 10365 | _bfd_error_handler |
695344c0 | 10366 | /* xgettext:c-format */ |
871b3ab2 | 10367 | (_("%pB: could not find output section %pA for input section %pA"), |
8b127cbc | 10368 | flinfo->output_bfd, input_sec->output_section, input_sec); |
17d078c5 | 10369 | bfd_set_error (bfd_error_nonrepresentable_section); |
0a1b45a2 AM |
10370 | eoinfo->failed = true; |
10371 | return false; | |
c152c796 AM |
10372 | } |
10373 | ||
10374 | /* ELF symbols in relocatable files are section relative, | |
10375 | but in nonrelocatable files they are virtual | |
10376 | addresses. */ | |
10377 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
0e1862bb | 10378 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10379 | { |
10380 | sym.st_value += input_sec->output_section->vma; | |
10381 | if (h->type == STT_TLS) | |
10382 | { | |
8b127cbc | 10383 | asection *tls_sec = elf_hash_table (flinfo->info)->tls_sec; |
430a16a5 NC |
10384 | if (tls_sec != NULL) |
10385 | sym.st_value -= tls_sec->vma; | |
c152c796 AM |
10386 | } |
10387 | } | |
10388 | } | |
10389 | else | |
10390 | { | |
10391 | BFD_ASSERT (input_sec->owner == NULL | |
10392 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
10393 | sym.st_shndx = SHN_UNDEF; | |
10394 | input_sec = bfd_und_section_ptr; | |
10395 | } | |
10396 | } | |
10397 | break; | |
10398 | ||
10399 | case bfd_link_hash_common: | |
10400 | input_sec = h->root.u.c.p->section; | |
a4d8e49b | 10401 | sym.st_shndx = bed->common_section_index (input_sec); |
c152c796 AM |
10402 | sym.st_value = 1 << h->root.u.c.p->alignment_power; |
10403 | break; | |
10404 | ||
10405 | case bfd_link_hash_indirect: | |
10406 | /* These symbols are created by symbol versioning. They point | |
10407 | to the decorated version of the name. For example, if the | |
10408 | symbol foo@@GNU_1.2 is the default, which should be used when | |
10409 | foo is used with no version, then we add an indirect symbol | |
10410 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
10411 | since the indirected symbol is already in the hash table. */ | |
0a1b45a2 | 10412 | return true; |
c152c796 AM |
10413 | } |
10414 | ||
b8871f35 L |
10415 | if (type == STT_COMMON || type == STT_OBJECT) |
10416 | switch (h->root.type) | |
10417 | { | |
10418 | case bfd_link_hash_common: | |
10419 | type = elf_link_convert_common_type (flinfo->info, type); | |
10420 | break; | |
10421 | case bfd_link_hash_defined: | |
10422 | case bfd_link_hash_defweak: | |
10423 | if (bed->common_definition (&sym)) | |
10424 | type = elf_link_convert_common_type (flinfo->info, type); | |
10425 | else | |
10426 | type = STT_OBJECT; | |
10427 | break; | |
10428 | case bfd_link_hash_undefined: | |
10429 | case bfd_link_hash_undefweak: | |
10430 | break; | |
10431 | default: | |
10432 | abort (); | |
10433 | } | |
10434 | ||
4deb8f71 | 10435 | if (h->forced_local) |
b8871f35 L |
10436 | { |
10437 | sym.st_info = ELF_ST_INFO (STB_LOCAL, type); | |
10438 | /* Turn off visibility on local symbol. */ | |
10439 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); | |
10440 | } | |
10441 | /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */ | |
10442 | else if (h->unique_global && h->def_regular) | |
10443 | sym.st_info = ELF_ST_INFO (STB_GNU_UNIQUE, type); | |
10444 | else if (h->root.type == bfd_link_hash_undefweak | |
10445 | || h->root.type == bfd_link_hash_defweak) | |
10446 | sym.st_info = ELF_ST_INFO (STB_WEAK, type); | |
10447 | else | |
10448 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, type); | |
10449 | sym.st_target_internal = h->target_internal; | |
10450 | ||
c152c796 AM |
10451 | /* Give the processor backend a chance to tweak the symbol value, |
10452 | and also to finish up anything that needs to be done for this | |
10453 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for | |
3aa14d16 | 10454 | forced local syms when non-shared is due to a historical quirk. |
5f35ea9c | 10455 | STT_GNU_IFUNC symbol must go through PLT. */ |
3aa14d16 | 10456 | if ((h->type == STT_GNU_IFUNC |
5f35ea9c | 10457 | && h->def_regular |
0e1862bb | 10458 | && !bfd_link_relocatable (flinfo->info)) |
3aa14d16 L |
10459 | || ((h->dynindx != -1 |
10460 | || h->forced_local) | |
0e1862bb | 10461 | && ((bfd_link_pic (flinfo->info) |
3aa14d16 L |
10462 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
10463 | || h->root.type != bfd_link_hash_undefweak)) | |
10464 | || !h->forced_local) | |
8b127cbc | 10465 | && elf_hash_table (flinfo->info)->dynamic_sections_created)) |
c152c796 AM |
10466 | { |
10467 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
8b127cbc | 10468 | (flinfo->output_bfd, flinfo->info, h, &sym))) |
c152c796 | 10469 | { |
0a1b45a2 AM |
10470 | eoinfo->failed = true; |
10471 | return false; | |
c152c796 AM |
10472 | } |
10473 | } | |
10474 | ||
10475 | /* If we are marking the symbol as undefined, and there are no | |
10476 | non-weak references to this symbol from a regular object, then | |
10477 | mark the symbol as weak undefined; if there are non-weak | |
10478 | references, mark the symbol as strong. We can't do this earlier, | |
10479 | because it might not be marked as undefined until the | |
10480 | finish_dynamic_symbol routine gets through with it. */ | |
10481 | if (sym.st_shndx == SHN_UNDEF | |
f5385ebf | 10482 | && h->ref_regular |
c152c796 AM |
10483 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
10484 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
10485 | { | |
10486 | int bindtype; | |
b8871f35 | 10487 | type = ELF_ST_TYPE (sym.st_info); |
2955ec4c L |
10488 | |
10489 | /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */ | |
10490 | if (type == STT_GNU_IFUNC) | |
10491 | type = STT_FUNC; | |
c152c796 | 10492 | |
f5385ebf | 10493 | if (h->ref_regular_nonweak) |
c152c796 AM |
10494 | bindtype = STB_GLOBAL; |
10495 | else | |
10496 | bindtype = STB_WEAK; | |
2955ec4c | 10497 | sym.st_info = ELF_ST_INFO (bindtype, type); |
c152c796 AM |
10498 | } |
10499 | ||
bda987c2 CD |
10500 | /* If this is a symbol defined in a dynamic library, don't use the |
10501 | symbol size from the dynamic library. Relinking an executable | |
10502 | against a new library may introduce gratuitous changes in the | |
10503 | executable's symbols if we keep the size. */ | |
10504 | if (sym.st_shndx == SHN_UNDEF | |
10505 | && !h->def_regular | |
10506 | && h->def_dynamic) | |
10507 | sym.st_size = 0; | |
10508 | ||
c152c796 AM |
10509 | /* If a non-weak symbol with non-default visibility is not defined |
10510 | locally, it is a fatal error. */ | |
0e1862bb | 10511 | if (!bfd_link_relocatable (flinfo->info) |
c152c796 AM |
10512 | && ELF_ST_VISIBILITY (sym.st_other) != STV_DEFAULT |
10513 | && ELF_ST_BIND (sym.st_info) != STB_WEAK | |
10514 | && h->root.type == bfd_link_hash_undefined | |
f5385ebf | 10515 | && !h->def_regular) |
c152c796 | 10516 | { |
17d078c5 AM |
10517 | const char *msg; |
10518 | ||
10519 | if (ELF_ST_VISIBILITY (sym.st_other) == STV_PROTECTED) | |
695344c0 | 10520 | /* xgettext:c-format */ |
871b3ab2 | 10521 | msg = _("%pB: protected symbol `%s' isn't defined"); |
17d078c5 | 10522 | else if (ELF_ST_VISIBILITY (sym.st_other) == STV_INTERNAL) |
695344c0 | 10523 | /* xgettext:c-format */ |
871b3ab2 | 10524 | msg = _("%pB: internal symbol `%s' isn't defined"); |
17d078c5 | 10525 | else |
695344c0 | 10526 | /* xgettext:c-format */ |
871b3ab2 | 10527 | msg = _("%pB: hidden symbol `%s' isn't defined"); |
4eca0228 | 10528 | _bfd_error_handler (msg, flinfo->output_bfd, h->root.root.string); |
17d078c5 | 10529 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 AM |
10530 | eoinfo->failed = true; |
10531 | return false; | |
c152c796 AM |
10532 | } |
10533 | ||
10534 | /* If this symbol should be put in the .dynsym section, then put it | |
10535 | there now. We already know the symbol index. We also fill in | |
10536 | the entry in the .hash section. */ | |
1c2649ed EB |
10537 | if (h->dynindx != -1 |
10538 | && elf_hash_table (flinfo->info)->dynamic_sections_created | |
10539 | && elf_hash_table (flinfo->info)->dynsym != NULL | |
10540 | && !discarded_section (elf_hash_table (flinfo->info)->dynsym)) | |
c152c796 | 10541 | { |
c152c796 AM |
10542 | bfd_byte *esym; |
10543 | ||
90c984fc L |
10544 | /* Since there is no version information in the dynamic string, |
10545 | if there is no version info in symbol version section, we will | |
1659f720 | 10546 | have a run-time problem if not linking executable, referenced |
4deb8f71 | 10547 | by shared library, or not bound locally. */ |
1659f720 | 10548 | if (h->verinfo.verdef == NULL |
0e1862bb | 10549 | && (!bfd_link_executable (flinfo->info) |
1659f720 L |
10550 | || h->ref_dynamic |
10551 | || !h->def_regular)) | |
90c984fc L |
10552 | { |
10553 | char *p = strrchr (h->root.root.string, ELF_VER_CHR); | |
10554 | ||
10555 | if (p && p [1] != '\0') | |
10556 | { | |
4eca0228 | 10557 | _bfd_error_handler |
695344c0 | 10558 | /* xgettext:c-format */ |
9793eb77 | 10559 | (_("%pB: no symbol version section for versioned symbol `%s'"), |
90c984fc | 10560 | flinfo->output_bfd, h->root.root.string); |
0a1b45a2 AM |
10561 | eoinfo->failed = true; |
10562 | return false; | |
90c984fc L |
10563 | } |
10564 | } | |
10565 | ||
c152c796 | 10566 | sym.st_name = h->dynstr_index; |
cae1fbbb L |
10567 | esym = (elf_hash_table (flinfo->info)->dynsym->contents |
10568 | + h->dynindx * bed->s->sizeof_sym); | |
8b127cbc | 10569 | if (!check_dynsym (flinfo->output_bfd, &sym)) |
c0d5a53d | 10570 | { |
0a1b45a2 AM |
10571 | eoinfo->failed = true; |
10572 | return false; | |
c0d5a53d | 10573 | } |
3d16b64e NA |
10574 | |
10575 | /* Inform the linker of the addition of this symbol. */ | |
10576 | ||
10577 | if (flinfo->info->callbacks->ctf_new_dynsym) | |
10578 | flinfo->info->callbacks->ctf_new_dynsym (h->dynindx, &sym); | |
10579 | ||
8b127cbc | 10580 | bed->s->swap_symbol_out (flinfo->output_bfd, &sym, esym, 0); |
c152c796 | 10581 | |
8b127cbc | 10582 | if (flinfo->hash_sec != NULL) |
fdc90cb4 JJ |
10583 | { |
10584 | size_t hash_entry_size; | |
10585 | bfd_byte *bucketpos; | |
10586 | bfd_vma chain; | |
41198d0c L |
10587 | size_t bucketcount; |
10588 | size_t bucket; | |
10589 | ||
8b127cbc | 10590 | bucketcount = elf_hash_table (flinfo->info)->bucketcount; |
41198d0c | 10591 | bucket = h->u.elf_hash_value % bucketcount; |
fdc90cb4 JJ |
10592 | |
10593 | hash_entry_size | |
8b127cbc AM |
10594 | = elf_section_data (flinfo->hash_sec)->this_hdr.sh_entsize; |
10595 | bucketpos = ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 | 10596 | + (bucket + 2) * hash_entry_size); |
8b127cbc AM |
10597 | chain = bfd_get (8 * hash_entry_size, flinfo->output_bfd, bucketpos); |
10598 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, h->dynindx, | |
10599 | bucketpos); | |
10600 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, chain, | |
10601 | ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 JJ |
10602 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); |
10603 | } | |
c152c796 | 10604 | |
8b127cbc | 10605 | if (flinfo->symver_sec != NULL && flinfo->symver_sec->contents != NULL) |
c152c796 AM |
10606 | { |
10607 | Elf_Internal_Versym iversym; | |
10608 | Elf_External_Versym *eversym; | |
10609 | ||
5fa370e4 | 10610 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
c152c796 | 10611 | { |
7b20f099 AM |
10612 | if (h->verinfo.verdef == NULL |
10613 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
10614 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
eb6e6af8 | 10615 | iversym.vs_vers = 1; |
c152c796 AM |
10616 | else |
10617 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
10618 | } | |
10619 | else | |
10620 | { | |
10621 | if (h->verinfo.vertree == NULL) | |
10622 | iversym.vs_vers = 1; | |
10623 | else | |
10624 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
8b127cbc | 10625 | if (flinfo->info->create_default_symver) |
3e3b46e5 | 10626 | iversym.vs_vers++; |
c152c796 AM |
10627 | } |
10628 | ||
422f1182 | 10629 | /* Turn on VERSYM_HIDDEN only if the hidden versioned symbol is |
6e33951e | 10630 | defined locally. */ |
422f1182 | 10631 | if (h->versioned == versioned_hidden && h->def_regular) |
c152c796 AM |
10632 | iversym.vs_vers |= VERSYM_HIDDEN; |
10633 | ||
8b127cbc | 10634 | eversym = (Elf_External_Versym *) flinfo->symver_sec->contents; |
c152c796 | 10635 | eversym += h->dynindx; |
8b127cbc | 10636 | _bfd_elf_swap_versym_out (flinfo->output_bfd, &iversym, eversym); |
c152c796 AM |
10637 | } |
10638 | } | |
10639 | ||
d983c8c5 AM |
10640 | /* If the symbol is undefined, and we didn't output it to .dynsym, |
10641 | strip it from .symtab too. Obviously we can't do this for | |
10642 | relocatable output or when needed for --emit-relocs. */ | |
10643 | else if (input_sec == bfd_und_section_ptr | |
10644 | && h->indx != -2 | |
66cae560 NC |
10645 | /* PR 22319 Do not strip global undefined symbols marked as being needed. */ |
10646 | && (h->mark != 1 || ELF_ST_BIND (sym.st_info) != STB_GLOBAL) | |
0e1862bb | 10647 | && !bfd_link_relocatable (flinfo->info)) |
0a1b45a2 | 10648 | return true; |
66cae560 | 10649 | |
d983c8c5 AM |
10650 | /* Also strip others that we couldn't earlier due to dynamic symbol |
10651 | processing. */ | |
10652 | if (strip) | |
0a1b45a2 | 10653 | return true; |
d983c8c5 | 10654 | if ((input_sec->flags & SEC_EXCLUDE) != 0) |
0a1b45a2 | 10655 | return true; |
c152c796 | 10656 | |
2ec55de3 AM |
10657 | /* Output a FILE symbol so that following locals are not associated |
10658 | with the wrong input file. We need one for forced local symbols | |
10659 | if we've seen more than one FILE symbol or when we have exactly | |
10660 | one FILE symbol but global symbols are present in a file other | |
10661 | than the one with the FILE symbol. We also need one if linker | |
10662 | defined symbols are present. In practice these conditions are | |
10663 | always met, so just emit the FILE symbol unconditionally. */ | |
10664 | if (eoinfo->localsyms | |
10665 | && !eoinfo->file_sym_done | |
10666 | && eoinfo->flinfo->filesym_count != 0) | |
10667 | { | |
10668 | Elf_Internal_Sym fsym; | |
10669 | ||
10670 | memset (&fsym, 0, sizeof (fsym)); | |
10671 | fsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
10672 | fsym.st_shndx = SHN_ABS; | |
ef10c3ac L |
10673 | if (!elf_link_output_symstrtab (eoinfo->flinfo, NULL, &fsym, |
10674 | bfd_und_section_ptr, NULL)) | |
0a1b45a2 | 10675 | return false; |
2ec55de3 | 10676 | |
0a1b45a2 | 10677 | eoinfo->file_sym_done = true; |
2ec55de3 AM |
10678 | } |
10679 | ||
8b127cbc | 10680 | indx = bfd_get_symcount (flinfo->output_bfd); |
ef10c3ac L |
10681 | ret = elf_link_output_symstrtab (flinfo, h->root.root.string, &sym, |
10682 | input_sec, h); | |
6e0b88f1 | 10683 | if (ret == 0) |
c152c796 | 10684 | { |
0a1b45a2 AM |
10685 | eoinfo->failed = true; |
10686 | return false; | |
c152c796 | 10687 | } |
6e0b88f1 AM |
10688 | else if (ret == 1) |
10689 | h->indx = indx; | |
10690 | else if (h->indx == -2) | |
10691 | abort(); | |
c152c796 | 10692 | |
0a1b45a2 | 10693 | return true; |
c152c796 AM |
10694 | } |
10695 | ||
cdd3575c AM |
10696 | /* Return TRUE if special handling is done for relocs in SEC against |
10697 | symbols defined in discarded sections. */ | |
10698 | ||
0a1b45a2 | 10699 | static bool |
c152c796 AM |
10700 | elf_section_ignore_discarded_relocs (asection *sec) |
10701 | { | |
10702 | const struct elf_backend_data *bed; | |
10703 | ||
cdd3575c AM |
10704 | switch (sec->sec_info_type) |
10705 | { | |
dbaa2011 AM |
10706 | case SEC_INFO_TYPE_STABS: |
10707 | case SEC_INFO_TYPE_EH_FRAME: | |
2f0c68f2 | 10708 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
0a1b45a2 | 10709 | return true; |
cdd3575c AM |
10710 | default: |
10711 | break; | |
10712 | } | |
c152c796 AM |
10713 | |
10714 | bed = get_elf_backend_data (sec->owner); | |
10715 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
10716 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
0a1b45a2 | 10717 | return true; |
c152c796 | 10718 | |
0a1b45a2 | 10719 | return false; |
c152c796 AM |
10720 | } |
10721 | ||
9e66c942 AM |
10722 | /* Return a mask saying how ld should treat relocations in SEC against |
10723 | symbols defined in discarded sections. If this function returns | |
10724 | COMPLAIN set, ld will issue a warning message. If this function | |
10725 | returns PRETEND set, and the discarded section was link-once and the | |
10726 | same size as the kept link-once section, ld will pretend that the | |
10727 | symbol was actually defined in the kept section. Otherwise ld will | |
10728 | zero the reloc (at least that is the intent, but some cooperation by | |
10729 | the target dependent code is needed, particularly for REL targets). */ | |
10730 | ||
8a696751 AM |
10731 | unsigned int |
10732 | _bfd_elf_default_action_discarded (asection *sec) | |
cdd3575c | 10733 | { |
9e66c942 | 10734 | if (sec->flags & SEC_DEBUGGING) |
69d54b1b | 10735 | return PRETEND; |
cdd3575c AM |
10736 | |
10737 | if (strcmp (".eh_frame", sec->name) == 0) | |
9e66c942 | 10738 | return 0; |
cdd3575c AM |
10739 | |
10740 | if (strcmp (".gcc_except_table", sec->name) == 0) | |
9e66c942 | 10741 | return 0; |
cdd3575c | 10742 | |
9e66c942 | 10743 | return COMPLAIN | PRETEND; |
cdd3575c AM |
10744 | } |
10745 | ||
3d7f7666 L |
10746 | /* Find a match between a section and a member of a section group. */ |
10747 | ||
10748 | static asection * | |
c0f00686 L |
10749 | match_group_member (asection *sec, asection *group, |
10750 | struct bfd_link_info *info) | |
3d7f7666 L |
10751 | { |
10752 | asection *first = elf_next_in_group (group); | |
10753 | asection *s = first; | |
10754 | ||
10755 | while (s != NULL) | |
10756 | { | |
c0f00686 | 10757 | if (bfd_elf_match_symbols_in_sections (s, sec, info)) |
3d7f7666 L |
10758 | return s; |
10759 | ||
83180ade | 10760 | s = elf_next_in_group (s); |
3d7f7666 L |
10761 | if (s == first) |
10762 | break; | |
10763 | } | |
10764 | ||
10765 | return NULL; | |
10766 | } | |
10767 | ||
01b3c8ab | 10768 | /* Check if the kept section of a discarded section SEC can be used |
c2370991 AM |
10769 | to replace it. Return the replacement if it is OK. Otherwise return |
10770 | NULL. */ | |
01b3c8ab L |
10771 | |
10772 | asection * | |
c0f00686 | 10773 | _bfd_elf_check_kept_section (asection *sec, struct bfd_link_info *info) |
01b3c8ab L |
10774 | { |
10775 | asection *kept; | |
10776 | ||
10777 | kept = sec->kept_section; | |
10778 | if (kept != NULL) | |
10779 | { | |
c2370991 | 10780 | if ((kept->flags & SEC_GROUP) != 0) |
c0f00686 | 10781 | kept = match_group_member (sec, kept, info); |
58349d00 L |
10782 | if (kept != NULL) |
10783 | { | |
10784 | if ((sec->rawsize != 0 ? sec->rawsize : sec->size) | |
10785 | != (kept->rawsize != 0 ? kept->rawsize : kept->size)) | |
10786 | kept = NULL; | |
10787 | else | |
10788 | { | |
10789 | /* Get the real kept section. */ | |
10790 | asection *next; | |
10791 | for (next = kept->kept_section; | |
10792 | next != NULL; | |
10793 | next = next->kept_section) | |
10794 | kept = next; | |
10795 | } | |
10796 | } | |
c2370991 | 10797 | sec->kept_section = kept; |
01b3c8ab L |
10798 | } |
10799 | return kept; | |
10800 | } | |
10801 | ||
c152c796 AM |
10802 | /* Link an input file into the linker output file. This function |
10803 | handles all the sections and relocations of the input file at once. | |
10804 | This is so that we only have to read the local symbols once, and | |
10805 | don't have to keep them in memory. */ | |
10806 | ||
0a1b45a2 | 10807 | static bool |
8b127cbc | 10808 | elf_link_input_bfd (struct elf_final_link_info *flinfo, bfd *input_bfd) |
c152c796 | 10809 | { |
ece5ef60 | 10810 | int (*relocate_section) |
c152c796 AM |
10811 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
10812 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); | |
10813 | bfd *output_bfd; | |
10814 | Elf_Internal_Shdr *symtab_hdr; | |
10815 | size_t locsymcount; | |
10816 | size_t extsymoff; | |
10817 | Elf_Internal_Sym *isymbuf; | |
10818 | Elf_Internal_Sym *isym; | |
10819 | Elf_Internal_Sym *isymend; | |
10820 | long *pindex; | |
10821 | asection **ppsection; | |
10822 | asection *o; | |
10823 | const struct elf_backend_data *bed; | |
c152c796 | 10824 | struct elf_link_hash_entry **sym_hashes; |
310fd250 L |
10825 | bfd_size_type address_size; |
10826 | bfd_vma r_type_mask; | |
10827 | int r_sym_shift; | |
0a1b45a2 | 10828 | bool have_file_sym = false; |
c152c796 | 10829 | |
8b127cbc | 10830 | output_bfd = flinfo->output_bfd; |
c152c796 AM |
10831 | bed = get_elf_backend_data (output_bfd); |
10832 | relocate_section = bed->elf_backend_relocate_section; | |
10833 | ||
10834 | /* If this is a dynamic object, we don't want to do anything here: | |
10835 | we don't want the local symbols, and we don't want the section | |
10836 | contents. */ | |
10837 | if ((input_bfd->flags & DYNAMIC) != 0) | |
0a1b45a2 | 10838 | return true; |
c152c796 | 10839 | |
c152c796 AM |
10840 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
10841 | if (elf_bad_symtab (input_bfd)) | |
10842 | { | |
10843 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
10844 | extsymoff = 0; | |
10845 | } | |
10846 | else | |
10847 | { | |
10848 | locsymcount = symtab_hdr->sh_info; | |
10849 | extsymoff = symtab_hdr->sh_info; | |
10850 | } | |
10851 | ||
99fabbc9 JL |
10852 | /* Enable GNU OSABI features in the output BFD that are used in the input |
10853 | BFD. */ | |
10854 | if (bed->elf_osabi == ELFOSABI_NONE | |
10855 | || bed->elf_osabi == ELFOSABI_GNU | |
10856 | || bed->elf_osabi == ELFOSABI_FREEBSD) | |
10857 | elf_tdata (output_bfd)->has_gnu_osabi | |
04f89674 L |
10858 | |= (elf_tdata (input_bfd)->has_gnu_osabi |
10859 | & (bfd_link_relocatable (flinfo->info) | |
10860 | ? -1 : ~elf_gnu_osabi_retain)); | |
99fabbc9 | 10861 | |
c152c796 AM |
10862 | /* Read the local symbols. */ |
10863 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
10864 | if (isymbuf == NULL && locsymcount != 0) | |
10865 | { | |
10866 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
8b127cbc AM |
10867 | flinfo->internal_syms, |
10868 | flinfo->external_syms, | |
10869 | flinfo->locsym_shndx); | |
c152c796 | 10870 | if (isymbuf == NULL) |
0a1b45a2 | 10871 | return false; |
c152c796 AM |
10872 | } |
10873 | ||
10874 | /* Find local symbol sections and adjust values of symbols in | |
10875 | SEC_MERGE sections. Write out those local symbols we know are | |
10876 | going into the output file. */ | |
10877 | isymend = isymbuf + locsymcount; | |
8b127cbc | 10878 | for (isym = isymbuf, pindex = flinfo->indices, ppsection = flinfo->sections; |
c152c796 AM |
10879 | isym < isymend; |
10880 | isym++, pindex++, ppsection++) | |
10881 | { | |
10882 | asection *isec; | |
10883 | const char *name; | |
10884 | Elf_Internal_Sym osym; | |
6e0b88f1 AM |
10885 | long indx; |
10886 | int ret; | |
c152c796 AM |
10887 | |
10888 | *pindex = -1; | |
10889 | ||
10890 | if (elf_bad_symtab (input_bfd)) | |
10891 | { | |
10892 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
10893 | { | |
10894 | *ppsection = NULL; | |
10895 | continue; | |
10896 | } | |
10897 | } | |
10898 | ||
10899 | if (isym->st_shndx == SHN_UNDEF) | |
10900 | isec = bfd_und_section_ptr; | |
c152c796 AM |
10901 | else if (isym->st_shndx == SHN_ABS) |
10902 | isec = bfd_abs_section_ptr; | |
10903 | else if (isym->st_shndx == SHN_COMMON) | |
10904 | isec = bfd_com_section_ptr; | |
10905 | else | |
10906 | { | |
cb33740c AM |
10907 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
10908 | if (isec == NULL) | |
10909 | { | |
10910 | /* Don't attempt to output symbols with st_shnx in the | |
10911 | reserved range other than SHN_ABS and SHN_COMMON. */ | |
6835821b | 10912 | isec = bfd_und_section_ptr; |
cb33740c | 10913 | } |
dbaa2011 | 10914 | else if (isec->sec_info_type == SEC_INFO_TYPE_MERGE |
cb33740c AM |
10915 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
10916 | isym->st_value = | |
10917 | _bfd_merged_section_offset (output_bfd, &isec, | |
10918 | elf_section_data (isec)->sec_info, | |
10919 | isym->st_value); | |
c152c796 AM |
10920 | } |
10921 | ||
10922 | *ppsection = isec; | |
10923 | ||
d983c8c5 AM |
10924 | /* Don't output the first, undefined, symbol. In fact, don't |
10925 | output any undefined local symbol. */ | |
10926 | if (isec == bfd_und_section_ptr) | |
c152c796 AM |
10927 | continue; |
10928 | ||
10929 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
10930 | { | |
10931 | /* We never output section symbols. Instead, we use the | |
10932 | section symbol of the corresponding section in the output | |
10933 | file. */ | |
10934 | continue; | |
10935 | } | |
10936 | ||
10937 | /* If we are stripping all symbols, we don't want to output this | |
10938 | one. */ | |
8b127cbc | 10939 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
10940 | continue; |
10941 | ||
10942 | /* If we are discarding all local symbols, we don't want to | |
10943 | output this one. If we are generating a relocatable output | |
10944 | file, then some of the local symbols may be required by | |
10945 | relocs; we output them below as we discover that they are | |
10946 | needed. */ | |
8b127cbc | 10947 | if (flinfo->info->discard == discard_all) |
c152c796 AM |
10948 | continue; |
10949 | ||
10950 | /* If this symbol is defined in a section which we are | |
f02571c5 | 10951 | discarding, we don't need to keep it. */ |
abf874aa CL |
10952 | if (isym->st_shndx != SHN_UNDEF |
10953 | && isym->st_shndx < SHN_LORESERVE | |
10954 | && isec->output_section == NULL | |
10955 | && flinfo->info->non_contiguous_regions | |
10956 | && flinfo->info->non_contiguous_regions_warnings) | |
10957 | { | |
10958 | _bfd_error_handler (_("warning: --enable-non-contiguous-regions " | |
10959 | "discards section `%s' from '%s'\n"), | |
765cf5f6 | 10960 | isec->name, bfd_get_filename (isec->owner)); |
abf874aa CL |
10961 | continue; |
10962 | } | |
10963 | ||
f02571c5 | 10964 | if (isym->st_shndx != SHN_UNDEF |
4fbb74a6 AM |
10965 | && isym->st_shndx < SHN_LORESERVE |
10966 | && bfd_section_removed_from_list (output_bfd, | |
10967 | isec->output_section)) | |
e75a280b L |
10968 | continue; |
10969 | ||
c152c796 AM |
10970 | /* Get the name of the symbol. */ |
10971 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
10972 | isym->st_name); | |
10973 | if (name == NULL) | |
0a1b45a2 | 10974 | return false; |
c152c796 AM |
10975 | |
10976 | /* See if we are discarding symbols with this name. */ | |
8b127cbc | 10977 | if ((flinfo->info->strip == strip_some |
0a1b45a2 | 10978 | && (bfd_hash_lookup (flinfo->info->keep_hash, name, false, false) |
c152c796 | 10979 | == NULL)) |
8b127cbc | 10980 | || (((flinfo->info->discard == discard_sec_merge |
0e1862bb L |
10981 | && (isec->flags & SEC_MERGE) |
10982 | && !bfd_link_relocatable (flinfo->info)) | |
8b127cbc | 10983 | || flinfo->info->discard == discard_l) |
c152c796 AM |
10984 | && bfd_is_local_label_name (input_bfd, name))) |
10985 | continue; | |
10986 | ||
ffbc01cc AM |
10987 | if (ELF_ST_TYPE (isym->st_info) == STT_FILE) |
10988 | { | |
ce875075 AM |
10989 | if (input_bfd->lto_output) |
10990 | /* -flto puts a temp file name here. This means builds | |
10991 | are not reproducible. Discard the symbol. */ | |
10992 | continue; | |
0a1b45a2 | 10993 | have_file_sym = true; |
ffbc01cc AM |
10994 | flinfo->filesym_count += 1; |
10995 | } | |
10996 | if (!have_file_sym) | |
10997 | { | |
10998 | /* In the absence of debug info, bfd_find_nearest_line uses | |
10999 | FILE symbols to determine the source file for local | |
11000 | function symbols. Provide a FILE symbol here if input | |
11001 | files lack such, so that their symbols won't be | |
11002 | associated with a previous input file. It's not the | |
11003 | source file, but the best we can do. */ | |
5b4293ba | 11004 | const char *filename; |
0a1b45a2 | 11005 | have_file_sym = true; |
ffbc01cc AM |
11006 | flinfo->filesym_count += 1; |
11007 | memset (&osym, 0, sizeof (osym)); | |
11008 | osym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
11009 | osym.st_shndx = SHN_ABS; | |
5b4293ba AM |
11010 | if (input_bfd->lto_output) |
11011 | filename = NULL; | |
11012 | else | |
11013 | filename = lbasename (bfd_get_filename (input_bfd)); | |
11014 | if (!elf_link_output_symstrtab (flinfo, filename, &osym, | |
11015 | bfd_abs_section_ptr, NULL)) | |
0a1b45a2 | 11016 | return false; |
ffbc01cc AM |
11017 | } |
11018 | ||
c152c796 AM |
11019 | osym = *isym; |
11020 | ||
11021 | /* Adjust the section index for the output file. */ | |
11022 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
11023 | isec->output_section); | |
11024 | if (osym.st_shndx == SHN_BAD) | |
0a1b45a2 | 11025 | return false; |
c152c796 | 11026 | |
c152c796 AM |
11027 | /* ELF symbols in relocatable files are section relative, but |
11028 | in executable files they are virtual addresses. Note that | |
11029 | this code assumes that all ELF sections have an associated | |
11030 | BFD section with a reasonable value for output_offset; below | |
11031 | we assume that they also have a reasonable value for | |
11032 | output_section. Any special sections must be set up to meet | |
11033 | these requirements. */ | |
11034 | osym.st_value += isec->output_offset; | |
0e1862bb | 11035 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
11036 | { |
11037 | osym.st_value += isec->output_section->vma; | |
11038 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
11039 | { | |
11040 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
102def4d AM |
11041 | if (elf_hash_table (flinfo->info)->tls_sec != NULL) |
11042 | osym.st_value -= elf_hash_table (flinfo->info)->tls_sec->vma; | |
11043 | else | |
11044 | osym.st_info = ELF_ST_INFO (ELF_ST_BIND (osym.st_info), | |
11045 | STT_NOTYPE); | |
c152c796 AM |
11046 | } |
11047 | } | |
11048 | ||
6e0b88f1 | 11049 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac | 11050 | ret = elf_link_output_symstrtab (flinfo, name, &osym, isec, NULL); |
6e0b88f1 | 11051 | if (ret == 0) |
0a1b45a2 | 11052 | return false; |
6e0b88f1 AM |
11053 | else if (ret == 1) |
11054 | *pindex = indx; | |
c152c796 AM |
11055 | } |
11056 | ||
310fd250 L |
11057 | if (bed->s->arch_size == 32) |
11058 | { | |
11059 | r_type_mask = 0xff; | |
11060 | r_sym_shift = 8; | |
11061 | address_size = 4; | |
11062 | } | |
11063 | else | |
11064 | { | |
11065 | r_type_mask = 0xffffffff; | |
11066 | r_sym_shift = 32; | |
11067 | address_size = 8; | |
11068 | } | |
11069 | ||
c152c796 AM |
11070 | /* Relocate the contents of each section. */ |
11071 | sym_hashes = elf_sym_hashes (input_bfd); | |
11072 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
11073 | { | |
11074 | bfd_byte *contents; | |
11075 | ||
11076 | if (! o->linker_mark) | |
11077 | { | |
11078 | /* This section was omitted from the link. */ | |
11079 | continue; | |
11080 | } | |
11081 | ||
7bdf4127 | 11082 | if (!flinfo->info->resolve_section_groups |
bcacc0f5 AM |
11083 | && (o->flags & (SEC_LINKER_CREATED | SEC_GROUP)) == SEC_GROUP) |
11084 | { | |
11085 | /* Deal with the group signature symbol. */ | |
11086 | struct bfd_elf_section_data *sec_data = elf_section_data (o); | |
11087 | unsigned long symndx = sec_data->this_hdr.sh_info; | |
11088 | asection *osec = o->output_section; | |
11089 | ||
7bdf4127 | 11090 | BFD_ASSERT (bfd_link_relocatable (flinfo->info)); |
bcacc0f5 AM |
11091 | if (symndx >= locsymcount |
11092 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 11093 | && flinfo->sections[symndx] == NULL)) |
bcacc0f5 AM |
11094 | { |
11095 | struct elf_link_hash_entry *h = sym_hashes[symndx - extsymoff]; | |
11096 | while (h->root.type == bfd_link_hash_indirect | |
11097 | || h->root.type == bfd_link_hash_warning) | |
11098 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
11099 | /* Arrange for symbol to be output. */ | |
11100 | h->indx = -2; | |
11101 | elf_section_data (osec)->this_hdr.sh_info = -2; | |
11102 | } | |
11103 | else if (ELF_ST_TYPE (isymbuf[symndx].st_info) == STT_SECTION) | |
11104 | { | |
11105 | /* We'll use the output section target_index. */ | |
8b127cbc | 11106 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 AM |
11107 | elf_section_data (osec)->this_hdr.sh_info = sec->target_index; |
11108 | } | |
11109 | else | |
11110 | { | |
8b127cbc | 11111 | if (flinfo->indices[symndx] == -1) |
bcacc0f5 AM |
11112 | { |
11113 | /* Otherwise output the local symbol now. */ | |
11114 | Elf_Internal_Sym sym = isymbuf[symndx]; | |
8b127cbc | 11115 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 | 11116 | const char *name; |
6e0b88f1 AM |
11117 | long indx; |
11118 | int ret; | |
bcacc0f5 AM |
11119 | |
11120 | name = bfd_elf_string_from_elf_section (input_bfd, | |
11121 | symtab_hdr->sh_link, | |
11122 | sym.st_name); | |
11123 | if (name == NULL) | |
0a1b45a2 | 11124 | return false; |
bcacc0f5 AM |
11125 | |
11126 | sym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
11127 | sec); | |
11128 | if (sym.st_shndx == SHN_BAD) | |
0a1b45a2 | 11129 | return false; |
bcacc0f5 AM |
11130 | |
11131 | sym.st_value += o->output_offset; | |
11132 | ||
6e0b88f1 | 11133 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
11134 | ret = elf_link_output_symstrtab (flinfo, name, &sym, o, |
11135 | NULL); | |
6e0b88f1 | 11136 | if (ret == 0) |
0a1b45a2 | 11137 | return false; |
6e0b88f1 | 11138 | else if (ret == 1) |
8b127cbc | 11139 | flinfo->indices[symndx] = indx; |
6e0b88f1 AM |
11140 | else |
11141 | abort (); | |
bcacc0f5 AM |
11142 | } |
11143 | elf_section_data (osec)->this_hdr.sh_info | |
8b127cbc | 11144 | = flinfo->indices[symndx]; |
bcacc0f5 AM |
11145 | } |
11146 | } | |
11147 | ||
c152c796 | 11148 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
eea6121a | 11149 | || (o->size == 0 && (o->flags & SEC_RELOC) == 0)) |
c152c796 AM |
11150 | continue; |
11151 | ||
11152 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
11153 | { | |
11154 | /* Section was created by _bfd_elf_link_create_dynamic_sections | |
11155 | or somesuch. */ | |
11156 | continue; | |
11157 | } | |
11158 | ||
11159 | /* Get the contents of the section. They have been cached by a | |
11160 | relaxation routine. Note that o is a section in an input | |
11161 | file, so the contents field will not have been set by any of | |
11162 | the routines which work on output files. */ | |
11163 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
53291d1f AM |
11164 | { |
11165 | contents = elf_section_data (o)->this_hdr.contents; | |
11166 | if (bed->caches_rawsize | |
11167 | && o->rawsize != 0 | |
11168 | && o->rawsize < o->size) | |
11169 | { | |
11170 | memcpy (flinfo->contents, contents, o->rawsize); | |
11171 | contents = flinfo->contents; | |
11172 | } | |
11173 | } | |
c152c796 AM |
11174 | else |
11175 | { | |
8b127cbc | 11176 | contents = flinfo->contents; |
4a114e3e | 11177 | if (! bfd_get_full_section_contents (input_bfd, o, &contents)) |
0a1b45a2 | 11178 | return false; |
c152c796 AM |
11179 | } |
11180 | ||
11181 | if ((o->flags & SEC_RELOC) != 0) | |
11182 | { | |
11183 | Elf_Internal_Rela *internal_relocs; | |
0f02bbd9 | 11184 | Elf_Internal_Rela *rel, *relend; |
0f02bbd9 | 11185 | int action_discarded; |
ece5ef60 | 11186 | int ret; |
c152c796 AM |
11187 | |
11188 | /* Get the swapped relocs. */ | |
11189 | internal_relocs | |
8b127cbc | 11190 | = _bfd_elf_link_read_relocs (input_bfd, o, flinfo->external_relocs, |
0a1b45a2 | 11191 | flinfo->internal_relocs, false); |
c152c796 AM |
11192 | if (internal_relocs == NULL |
11193 | && o->reloc_count > 0) | |
0a1b45a2 | 11194 | return false; |
c152c796 | 11195 | |
310fd250 L |
11196 | /* We need to reverse-copy input .ctors/.dtors sections if |
11197 | they are placed in .init_array/.finit_array for output. */ | |
11198 | if (o->size > address_size | |
3f3328b8 | 11199 | && ((startswith (o->name, ".ctors") |
310fd250 L |
11200 | && strcmp (o->output_section->name, |
11201 | ".init_array") == 0) | |
3f3328b8 | 11202 | || (startswith (o->name, ".dtors") |
310fd250 L |
11203 | && strcmp (o->output_section->name, |
11204 | ".fini_array") == 0)) | |
11205 | && (o->name[6] == 0 || o->name[6] == '.')) | |
c152c796 | 11206 | { |
056bafd4 MR |
11207 | if (o->size * bed->s->int_rels_per_ext_rel |
11208 | != o->reloc_count * address_size) | |
310fd250 | 11209 | { |
4eca0228 | 11210 | _bfd_error_handler |
695344c0 | 11211 | /* xgettext:c-format */ |
871b3ab2 | 11212 | (_("error: %pB: size of section %pA is not " |
310fd250 L |
11213 | "multiple of address size"), |
11214 | input_bfd, o); | |
8c6716e5 | 11215 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 11216 | return false; |
310fd250 L |
11217 | } |
11218 | o->flags |= SEC_ELF_REVERSE_COPY; | |
c152c796 AM |
11219 | } |
11220 | ||
0f02bbd9 | 11221 | action_discarded = -1; |
c152c796 | 11222 | if (!elf_section_ignore_discarded_relocs (o)) |
0f02bbd9 AM |
11223 | action_discarded = (*bed->action_discarded) (o); |
11224 | ||
11225 | /* Run through the relocs evaluating complex reloc symbols and | |
11226 | looking for relocs against symbols from discarded sections | |
11227 | or section symbols from removed link-once sections. | |
11228 | Complain about relocs against discarded sections. Zero | |
11229 | relocs against removed link-once sections. */ | |
11230 | ||
11231 | rel = internal_relocs; | |
056bafd4 | 11232 | relend = rel + o->reloc_count; |
0f02bbd9 | 11233 | for ( ; rel < relend; rel++) |
c152c796 | 11234 | { |
0f02bbd9 AM |
11235 | unsigned long r_symndx = rel->r_info >> r_sym_shift; |
11236 | unsigned int s_type; | |
11237 | asection **ps, *sec; | |
11238 | struct elf_link_hash_entry *h = NULL; | |
11239 | const char *sym_name; | |
c152c796 | 11240 | |
0f02bbd9 AM |
11241 | if (r_symndx == STN_UNDEF) |
11242 | continue; | |
c152c796 | 11243 | |
0f02bbd9 AM |
11244 | if (r_symndx >= locsymcount |
11245 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 11246 | && flinfo->sections[r_symndx] == NULL)) |
0f02bbd9 AM |
11247 | { |
11248 | h = sym_hashes[r_symndx - extsymoff]; | |
ee75fd95 | 11249 | |
0f02bbd9 AM |
11250 | /* Badly formatted input files can contain relocs that |
11251 | reference non-existant symbols. Check here so that | |
11252 | we do not seg fault. */ | |
11253 | if (h == NULL) | |
c152c796 | 11254 | { |
4eca0228 | 11255 | _bfd_error_handler |
695344c0 | 11256 | /* xgettext:c-format */ |
2dcf00ce | 11257 | (_("error: %pB contains a reloc (%#" PRIx64 ") for section %pA " |
0f02bbd9 | 11258 | "that references a non-existent global symbol"), |
2dcf00ce | 11259 | input_bfd, (uint64_t) rel->r_info, o); |
0f02bbd9 | 11260 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 11261 | return false; |
0f02bbd9 | 11262 | } |
3b36f7e6 | 11263 | |
0f02bbd9 AM |
11264 | while (h->root.type == bfd_link_hash_indirect |
11265 | || h->root.type == bfd_link_hash_warning) | |
11266 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c152c796 | 11267 | |
0f02bbd9 | 11268 | s_type = h->type; |
cdd3575c | 11269 | |
9e2dec47 | 11270 | /* If a plugin symbol is referenced from a non-IR file, |
ca4be51c AM |
11271 | mark the symbol as undefined. Note that the |
11272 | linker may attach linker created dynamic sections | |
11273 | to the plugin bfd. Symbols defined in linker | |
11274 | created sections are not plugin symbols. */ | |
bc4e12de | 11275 | if ((h->root.non_ir_ref_regular |
4070765b | 11276 | || h->root.non_ir_ref_dynamic) |
9e2dec47 L |
11277 | && (h->root.type == bfd_link_hash_defined |
11278 | || h->root.type == bfd_link_hash_defweak) | |
11279 | && (h->root.u.def.section->flags | |
11280 | & SEC_LINKER_CREATED) == 0 | |
11281 | && h->root.u.def.section->owner != NULL | |
11282 | && (h->root.u.def.section->owner->flags | |
11283 | & BFD_PLUGIN) != 0) | |
11284 | { | |
11285 | h->root.type = bfd_link_hash_undefined; | |
11286 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
11287 | } | |
11288 | ||
0f02bbd9 AM |
11289 | ps = NULL; |
11290 | if (h->root.type == bfd_link_hash_defined | |
11291 | || h->root.type == bfd_link_hash_defweak) | |
11292 | ps = &h->root.u.def.section; | |
11293 | ||
11294 | sym_name = h->root.root.string; | |
11295 | } | |
11296 | else | |
11297 | { | |
11298 | Elf_Internal_Sym *sym = isymbuf + r_symndx; | |
11299 | ||
11300 | s_type = ELF_ST_TYPE (sym->st_info); | |
8b127cbc | 11301 | ps = &flinfo->sections[r_symndx]; |
0f02bbd9 AM |
11302 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, |
11303 | sym, *ps); | |
11304 | } | |
c152c796 | 11305 | |
c301e700 | 11306 | if ((s_type == STT_RELC || s_type == STT_SRELC) |
0e1862bb | 11307 | && !bfd_link_relocatable (flinfo->info)) |
0f02bbd9 AM |
11308 | { |
11309 | bfd_vma val; | |
11310 | bfd_vma dot = (rel->r_offset | |
11311 | + o->output_offset + o->output_section->vma); | |
11312 | #ifdef DEBUG | |
11313 | printf ("Encountered a complex symbol!"); | |
11314 | printf (" (input_bfd %s, section %s, reloc %ld\n", | |
765cf5f6 | 11315 | bfd_get_filename (input_bfd), o->name, |
9ccb8af9 | 11316 | (long) (rel - internal_relocs)); |
0f02bbd9 AM |
11317 | printf (" symbol: idx %8.8lx, name %s\n", |
11318 | r_symndx, sym_name); | |
11319 | printf (" reloc : info %8.8lx, addr %8.8lx\n", | |
11320 | (unsigned long) rel->r_info, | |
11321 | (unsigned long) rel->r_offset); | |
11322 | #endif | |
8b127cbc | 11323 | if (!eval_symbol (&val, &sym_name, input_bfd, flinfo, dot, |
0f02bbd9 | 11324 | isymbuf, locsymcount, s_type == STT_SRELC)) |
0a1b45a2 | 11325 | return false; |
0f02bbd9 AM |
11326 | |
11327 | /* Symbol evaluated OK. Update to absolute value. */ | |
11328 | set_symbol_value (input_bfd, isymbuf, locsymcount, | |
11329 | r_symndx, val); | |
11330 | continue; | |
11331 | } | |
11332 | ||
11333 | if (action_discarded != -1 && ps != NULL) | |
11334 | { | |
cdd3575c AM |
11335 | /* Complain if the definition comes from a |
11336 | discarded section. */ | |
dbaa2011 | 11337 | if ((sec = *ps) != NULL && discarded_section (sec)) |
cdd3575c | 11338 | { |
cf35638d | 11339 | BFD_ASSERT (r_symndx != STN_UNDEF); |
0f02bbd9 | 11340 | if (action_discarded & COMPLAIN) |
8b127cbc | 11341 | (*flinfo->info->callbacks->einfo) |
695344c0 | 11342 | /* xgettext:c-format */ |
871b3ab2 AM |
11343 | (_("%X`%s' referenced in section `%pA' of %pB: " |
11344 | "defined in discarded section `%pA' of %pB\n"), | |
e1fffbe6 | 11345 | sym_name, o, input_bfd, sec, sec->owner); |
cdd3575c | 11346 | |
87e5235d | 11347 | /* Try to do the best we can to support buggy old |
e0ae6d6f | 11348 | versions of gcc. Pretend that the symbol is |
87e5235d AM |
11349 | really defined in the kept linkonce section. |
11350 | FIXME: This is quite broken. Modifying the | |
11351 | symbol here means we will be changing all later | |
e0ae6d6f | 11352 | uses of the symbol, not just in this section. */ |
0f02bbd9 | 11353 | if (action_discarded & PRETEND) |
87e5235d | 11354 | { |
01b3c8ab L |
11355 | asection *kept; |
11356 | ||
c0f00686 | 11357 | kept = _bfd_elf_check_kept_section (sec, |
8b127cbc | 11358 | flinfo->info); |
01b3c8ab | 11359 | if (kept != NULL) |
87e5235d AM |
11360 | { |
11361 | *ps = kept; | |
11362 | continue; | |
11363 | } | |
11364 | } | |
c152c796 AM |
11365 | } |
11366 | } | |
11367 | } | |
11368 | ||
11369 | /* Relocate the section by invoking a back end routine. | |
11370 | ||
11371 | The back end routine is responsible for adjusting the | |
11372 | section contents as necessary, and (if using Rela relocs | |
11373 | and generating a relocatable output file) adjusting the | |
11374 | reloc addend as necessary. | |
11375 | ||
11376 | The back end routine does not have to worry about setting | |
11377 | the reloc address or the reloc symbol index. | |
11378 | ||
11379 | The back end routine is given a pointer to the swapped in | |
11380 | internal symbols, and can access the hash table entries | |
11381 | for the external symbols via elf_sym_hashes (input_bfd). | |
11382 | ||
11383 | When generating relocatable output, the back end routine | |
11384 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
11385 | output symbol is going to be a section symbol | |
11386 | corresponding to the output section, which will require | |
11387 | the addend to be adjusted. */ | |
11388 | ||
8b127cbc | 11389 | ret = (*relocate_section) (output_bfd, flinfo->info, |
c152c796 AM |
11390 | input_bfd, o, contents, |
11391 | internal_relocs, | |
11392 | isymbuf, | |
8b127cbc | 11393 | flinfo->sections); |
ece5ef60 | 11394 | if (!ret) |
0a1b45a2 | 11395 | return false; |
c152c796 | 11396 | |
ece5ef60 | 11397 | if (ret == 2 |
0e1862bb | 11398 | || bfd_link_relocatable (flinfo->info) |
8b127cbc | 11399 | || flinfo->info->emitrelocations) |
c152c796 AM |
11400 | { |
11401 | Elf_Internal_Rela *irela; | |
d4730f92 | 11402 | Elf_Internal_Rela *irelaend, *irelamid; |
c152c796 AM |
11403 | bfd_vma last_offset; |
11404 | struct elf_link_hash_entry **rel_hash; | |
d4730f92 BS |
11405 | struct elf_link_hash_entry **rel_hash_list, **rela_hash_list; |
11406 | Elf_Internal_Shdr *input_rel_hdr, *input_rela_hdr; | |
c152c796 | 11407 | unsigned int next_erel; |
0a1b45a2 | 11408 | bool rela_normal; |
d4730f92 | 11409 | struct bfd_elf_section_data *esdi, *esdo; |
c152c796 | 11410 | |
d4730f92 BS |
11411 | esdi = elf_section_data (o); |
11412 | esdo = elf_section_data (o->output_section); | |
0a1b45a2 | 11413 | rela_normal = false; |
c152c796 AM |
11414 | |
11415 | /* Adjust the reloc addresses and symbol indices. */ | |
11416 | ||
11417 | irela = internal_relocs; | |
056bafd4 | 11418 | irelaend = irela + o->reloc_count; |
d4730f92 BS |
11419 | rel_hash = esdo->rel.hashes + esdo->rel.count; |
11420 | /* We start processing the REL relocs, if any. When we reach | |
11421 | IRELAMID in the loop, we switch to the RELA relocs. */ | |
11422 | irelamid = irela; | |
11423 | if (esdi->rel.hdr != NULL) | |
11424 | irelamid += (NUM_SHDR_ENTRIES (esdi->rel.hdr) | |
11425 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 11426 | rel_hash_list = rel_hash; |
d4730f92 | 11427 | rela_hash_list = NULL; |
c152c796 | 11428 | last_offset = o->output_offset; |
0e1862bb | 11429 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
11430 | last_offset += o->output_section->vma; |
11431 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) | |
11432 | { | |
11433 | unsigned long r_symndx; | |
11434 | asection *sec; | |
11435 | Elf_Internal_Sym sym; | |
11436 | ||
11437 | if (next_erel == bed->s->int_rels_per_ext_rel) | |
11438 | { | |
11439 | rel_hash++; | |
11440 | next_erel = 0; | |
11441 | } | |
11442 | ||
d4730f92 BS |
11443 | if (irela == irelamid) |
11444 | { | |
11445 | rel_hash = esdo->rela.hashes + esdo->rela.count; | |
11446 | rela_hash_list = rel_hash; | |
11447 | rela_normal = bed->rela_normal; | |
11448 | } | |
11449 | ||
c152c796 | 11450 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
8b127cbc | 11451 | flinfo->info, o, |
c152c796 AM |
11452 | irela->r_offset); |
11453 | if (irela->r_offset >= (bfd_vma) -2) | |
11454 | { | |
11455 | /* This is a reloc for a deleted entry or somesuch. | |
11456 | Turn it into an R_*_NONE reloc, at the same | |
11457 | offset as the last reloc. elf_eh_frame.c and | |
e460dd0d | 11458 | bfd_elf_discard_info rely on reloc offsets |
c152c796 AM |
11459 | being ordered. */ |
11460 | irela->r_offset = last_offset; | |
11461 | irela->r_info = 0; | |
11462 | irela->r_addend = 0; | |
11463 | continue; | |
11464 | } | |
11465 | ||
11466 | irela->r_offset += o->output_offset; | |
11467 | ||
11468 | /* Relocs in an executable have to be virtual addresses. */ | |
0e1862bb | 11469 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
11470 | irela->r_offset += o->output_section->vma; |
11471 | ||
11472 | last_offset = irela->r_offset; | |
11473 | ||
11474 | r_symndx = irela->r_info >> r_sym_shift; | |
11475 | if (r_symndx == STN_UNDEF) | |
11476 | continue; | |
11477 | ||
11478 | if (r_symndx >= locsymcount | |
11479 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 11480 | && flinfo->sections[r_symndx] == NULL)) |
c152c796 AM |
11481 | { |
11482 | struct elf_link_hash_entry *rh; | |
11483 | unsigned long indx; | |
11484 | ||
11485 | /* This is a reloc against a global symbol. We | |
11486 | have not yet output all the local symbols, so | |
11487 | we do not know the symbol index of any global | |
11488 | symbol. We set the rel_hash entry for this | |
11489 | reloc to point to the global hash table entry | |
11490 | for this symbol. The symbol index is then | |
ee75fd95 | 11491 | set at the end of bfd_elf_final_link. */ |
c152c796 AM |
11492 | indx = r_symndx - extsymoff; |
11493 | rh = elf_sym_hashes (input_bfd)[indx]; | |
11494 | while (rh->root.type == bfd_link_hash_indirect | |
11495 | || rh->root.type == bfd_link_hash_warning) | |
11496 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
11497 | ||
11498 | /* Setting the index to -2 tells | |
11499 | elf_link_output_extsym that this symbol is | |
11500 | used by a reloc. */ | |
11501 | BFD_ASSERT (rh->indx < 0); | |
11502 | rh->indx = -2; | |
c152c796 AM |
11503 | *rel_hash = rh; |
11504 | ||
11505 | continue; | |
11506 | } | |
11507 | ||
11508 | /* This is a reloc against a local symbol. */ | |
11509 | ||
11510 | *rel_hash = NULL; | |
11511 | sym = isymbuf[r_symndx]; | |
8b127cbc | 11512 | sec = flinfo->sections[r_symndx]; |
c152c796 AM |
11513 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
11514 | { | |
11515 | /* I suppose the backend ought to fill in the | |
11516 | section of any STT_SECTION symbol against a | |
6a8d1586 | 11517 | processor specific section. */ |
cf35638d | 11518 | r_symndx = STN_UNDEF; |
6a8d1586 AM |
11519 | if (bfd_is_abs_section (sec)) |
11520 | ; | |
c152c796 AM |
11521 | else if (sec == NULL || sec->owner == NULL) |
11522 | { | |
11523 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 11524 | return false; |
c152c796 AM |
11525 | } |
11526 | else | |
11527 | { | |
6a8d1586 AM |
11528 | asection *osec = sec->output_section; |
11529 | ||
11530 | /* If we have discarded a section, the output | |
11531 | section will be the absolute section. In | |
ab96bf03 AM |
11532 | case of discarded SEC_MERGE sections, use |
11533 | the kept section. relocate_section should | |
11534 | have already handled discarded linkonce | |
11535 | sections. */ | |
6a8d1586 AM |
11536 | if (bfd_is_abs_section (osec) |
11537 | && sec->kept_section != NULL | |
11538 | && sec->kept_section->output_section != NULL) | |
11539 | { | |
11540 | osec = sec->kept_section->output_section; | |
11541 | irela->r_addend -= osec->vma; | |
11542 | } | |
11543 | ||
11544 | if (!bfd_is_abs_section (osec)) | |
11545 | { | |
11546 | r_symndx = osec->target_index; | |
cf35638d | 11547 | if (r_symndx == STN_UNDEF) |
74541ad4 | 11548 | { |
051d833a AM |
11549 | irela->r_addend += osec->vma; |
11550 | osec = _bfd_nearby_section (output_bfd, osec, | |
11551 | osec->vma); | |
11552 | irela->r_addend -= osec->vma; | |
11553 | r_symndx = osec->target_index; | |
74541ad4 | 11554 | } |
6a8d1586 | 11555 | } |
c152c796 AM |
11556 | } |
11557 | ||
11558 | /* Adjust the addend according to where the | |
11559 | section winds up in the output section. */ | |
11560 | if (rela_normal) | |
11561 | irela->r_addend += sec->output_offset; | |
11562 | } | |
11563 | else | |
11564 | { | |
8b127cbc | 11565 | if (flinfo->indices[r_symndx] == -1) |
c152c796 AM |
11566 | { |
11567 | unsigned long shlink; | |
11568 | const char *name; | |
11569 | asection *osec; | |
6e0b88f1 | 11570 | long indx; |
c152c796 | 11571 | |
8b127cbc | 11572 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
11573 | { |
11574 | /* You can't do ld -r -s. */ | |
11575 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 11576 | return false; |
c152c796 AM |
11577 | } |
11578 | ||
11579 | /* This symbol was skipped earlier, but | |
11580 | since it is needed by a reloc, we | |
11581 | must output it now. */ | |
11582 | shlink = symtab_hdr->sh_link; | |
11583 | name = (bfd_elf_string_from_elf_section | |
11584 | (input_bfd, shlink, sym.st_name)); | |
11585 | if (name == NULL) | |
0a1b45a2 | 11586 | return false; |
c152c796 AM |
11587 | |
11588 | osec = sec->output_section; | |
11589 | sym.st_shndx = | |
11590 | _bfd_elf_section_from_bfd_section (output_bfd, | |
11591 | osec); | |
11592 | if (sym.st_shndx == SHN_BAD) | |
0a1b45a2 | 11593 | return false; |
c152c796 AM |
11594 | |
11595 | sym.st_value += sec->output_offset; | |
0e1862bb | 11596 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
11597 | { |
11598 | sym.st_value += osec->vma; | |
11599 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
11600 | { | |
102def4d AM |
11601 | struct elf_link_hash_table *htab |
11602 | = elf_hash_table (flinfo->info); | |
11603 | ||
c152c796 AM |
11604 | /* STT_TLS symbols are relative to PT_TLS |
11605 | segment base. */ | |
102def4d AM |
11606 | if (htab->tls_sec != NULL) |
11607 | sym.st_value -= htab->tls_sec->vma; | |
11608 | else | |
11609 | sym.st_info | |
11610 | = ELF_ST_INFO (ELF_ST_BIND (sym.st_info), | |
11611 | STT_NOTYPE); | |
c152c796 AM |
11612 | } |
11613 | } | |
11614 | ||
6e0b88f1 | 11615 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
11616 | ret = elf_link_output_symstrtab (flinfo, name, |
11617 | &sym, sec, | |
11618 | NULL); | |
6e0b88f1 | 11619 | if (ret == 0) |
0a1b45a2 | 11620 | return false; |
6e0b88f1 | 11621 | else if (ret == 1) |
8b127cbc | 11622 | flinfo->indices[r_symndx] = indx; |
6e0b88f1 AM |
11623 | else |
11624 | abort (); | |
c152c796 AM |
11625 | } |
11626 | ||
8b127cbc | 11627 | r_symndx = flinfo->indices[r_symndx]; |
c152c796 AM |
11628 | } |
11629 | ||
11630 | irela->r_info = ((bfd_vma) r_symndx << r_sym_shift | |
11631 | | (irela->r_info & r_type_mask)); | |
11632 | } | |
11633 | ||
11634 | /* Swap out the relocs. */ | |
d4730f92 BS |
11635 | input_rel_hdr = esdi->rel.hdr; |
11636 | if (input_rel_hdr && input_rel_hdr->sh_size != 0) | |
c152c796 | 11637 | { |
d4730f92 BS |
11638 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
11639 | input_rel_hdr, | |
11640 | internal_relocs, | |
11641 | rel_hash_list)) | |
0a1b45a2 | 11642 | return false; |
c152c796 AM |
11643 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) |
11644 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 11645 | rel_hash_list += NUM_SHDR_ENTRIES (input_rel_hdr); |
d4730f92 BS |
11646 | } |
11647 | ||
11648 | input_rela_hdr = esdi->rela.hdr; | |
11649 | if (input_rela_hdr && input_rela_hdr->sh_size != 0) | |
11650 | { | |
eac338cf | 11651 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
d4730f92 | 11652 | input_rela_hdr, |
eac338cf | 11653 | internal_relocs, |
d4730f92 | 11654 | rela_hash_list)) |
0a1b45a2 | 11655 | return false; |
c152c796 AM |
11656 | } |
11657 | } | |
11658 | } | |
11659 | ||
11660 | /* Write out the modified section contents. */ | |
11661 | if (bed->elf_backend_write_section | |
8b127cbc | 11662 | && (*bed->elf_backend_write_section) (output_bfd, flinfo->info, o, |
c7b8f16e | 11663 | contents)) |
c152c796 AM |
11664 | { |
11665 | /* Section written out. */ | |
11666 | } | |
11667 | else switch (o->sec_info_type) | |
11668 | { | |
dbaa2011 | 11669 | case SEC_INFO_TYPE_STABS: |
c152c796 AM |
11670 | if (! (_bfd_write_section_stabs |
11671 | (output_bfd, | |
8b127cbc | 11672 | &elf_hash_table (flinfo->info)->stab_info, |
c152c796 | 11673 | o, &elf_section_data (o)->sec_info, contents))) |
0a1b45a2 | 11674 | return false; |
c152c796 | 11675 | break; |
dbaa2011 | 11676 | case SEC_INFO_TYPE_MERGE: |
c152c796 AM |
11677 | if (! _bfd_write_merged_section (output_bfd, o, |
11678 | elf_section_data (o)->sec_info)) | |
0a1b45a2 | 11679 | return false; |
c152c796 | 11680 | break; |
dbaa2011 | 11681 | case SEC_INFO_TYPE_EH_FRAME: |
c152c796 | 11682 | { |
8b127cbc | 11683 | if (! _bfd_elf_write_section_eh_frame (output_bfd, flinfo->info, |
c152c796 | 11684 | o, contents)) |
0a1b45a2 | 11685 | return false; |
c152c796 AM |
11686 | } |
11687 | break; | |
2f0c68f2 CM |
11688 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
11689 | { | |
11690 | if (! _bfd_elf_write_section_eh_frame_entry (output_bfd, | |
11691 | flinfo->info, | |
11692 | o, contents)) | |
0a1b45a2 | 11693 | return false; |
2f0c68f2 CM |
11694 | } |
11695 | break; | |
c152c796 AM |
11696 | default: |
11697 | { | |
310fd250 L |
11698 | if (! (o->flags & SEC_EXCLUDE)) |
11699 | { | |
11700 | file_ptr offset = (file_ptr) o->output_offset; | |
11701 | bfd_size_type todo = o->size; | |
37b01f6a | 11702 | |
bb294208 | 11703 | offset *= bfd_octets_per_byte (output_bfd, o); |
37b01f6a | 11704 | |
310fd250 L |
11705 | if ((o->flags & SEC_ELF_REVERSE_COPY)) |
11706 | { | |
11707 | /* Reverse-copy input section to output. */ | |
11708 | do | |
11709 | { | |
11710 | todo -= address_size; | |
11711 | if (! bfd_set_section_contents (output_bfd, | |
11712 | o->output_section, | |
11713 | contents + todo, | |
11714 | offset, | |
11715 | address_size)) | |
0a1b45a2 | 11716 | return false; |
310fd250 L |
11717 | if (todo == 0) |
11718 | break; | |
11719 | offset += address_size; | |
11720 | } | |
11721 | while (1); | |
11722 | } | |
11723 | else if (! bfd_set_section_contents (output_bfd, | |
11724 | o->output_section, | |
11725 | contents, | |
11726 | offset, todo)) | |
0a1b45a2 | 11727 | return false; |
310fd250 | 11728 | } |
c152c796 AM |
11729 | } |
11730 | break; | |
11731 | } | |
11732 | } | |
11733 | ||
0a1b45a2 | 11734 | return true; |
c152c796 AM |
11735 | } |
11736 | ||
11737 | /* Generate a reloc when linking an ELF file. This is a reloc | |
3a800eb9 | 11738 | requested by the linker, and does not come from any input file. This |
c152c796 AM |
11739 | is used to build constructor and destructor tables when linking |
11740 | with -Ur. */ | |
11741 | ||
0a1b45a2 | 11742 | static bool |
c152c796 AM |
11743 | elf_reloc_link_order (bfd *output_bfd, |
11744 | struct bfd_link_info *info, | |
11745 | asection *output_section, | |
11746 | struct bfd_link_order *link_order) | |
11747 | { | |
11748 | reloc_howto_type *howto; | |
11749 | long indx; | |
11750 | bfd_vma offset; | |
11751 | bfd_vma addend; | |
d4730f92 | 11752 | struct bfd_elf_section_reloc_data *reldata; |
c152c796 AM |
11753 | struct elf_link_hash_entry **rel_hash_ptr; |
11754 | Elf_Internal_Shdr *rel_hdr; | |
11755 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
11756 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; | |
11757 | bfd_byte *erel; | |
11758 | unsigned int i; | |
d4730f92 | 11759 | struct bfd_elf_section_data *esdo = elf_section_data (output_section); |
c152c796 AM |
11760 | |
11761 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
11762 | if (howto == NULL) | |
11763 | { | |
11764 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 11765 | return false; |
c152c796 AM |
11766 | } |
11767 | ||
11768 | addend = link_order->u.reloc.p->addend; | |
11769 | ||
d4730f92 BS |
11770 | if (esdo->rel.hdr) |
11771 | reldata = &esdo->rel; | |
11772 | else if (esdo->rela.hdr) | |
11773 | reldata = &esdo->rela; | |
11774 | else | |
11775 | { | |
11776 | reldata = NULL; | |
11777 | BFD_ASSERT (0); | |
11778 | } | |
11779 | ||
c152c796 | 11780 | /* Figure out the symbol index. */ |
d4730f92 | 11781 | rel_hash_ptr = reldata->hashes + reldata->count; |
c152c796 AM |
11782 | if (link_order->type == bfd_section_reloc_link_order) |
11783 | { | |
11784 | indx = link_order->u.reloc.p->u.section->target_index; | |
11785 | BFD_ASSERT (indx != 0); | |
11786 | *rel_hash_ptr = NULL; | |
11787 | } | |
11788 | else | |
11789 | { | |
11790 | struct elf_link_hash_entry *h; | |
11791 | ||
11792 | /* Treat a reloc against a defined symbol as though it were | |
11793 | actually against the section. */ | |
11794 | h = ((struct elf_link_hash_entry *) | |
11795 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
11796 | link_order->u.reloc.p->u.name, | |
0a1b45a2 | 11797 | false, false, true)); |
c152c796 AM |
11798 | if (h != NULL |
11799 | && (h->root.type == bfd_link_hash_defined | |
11800 | || h->root.type == bfd_link_hash_defweak)) | |
11801 | { | |
11802 | asection *section; | |
11803 | ||
11804 | section = h->root.u.def.section; | |
11805 | indx = section->output_section->target_index; | |
11806 | *rel_hash_ptr = NULL; | |
11807 | /* It seems that we ought to add the symbol value to the | |
11808 | addend here, but in practice it has already been added | |
11809 | because it was passed to constructor_callback. */ | |
11810 | addend += section->output_section->vma + section->output_offset; | |
11811 | } | |
11812 | else if (h != NULL) | |
11813 | { | |
11814 | /* Setting the index to -2 tells elf_link_output_extsym that | |
11815 | this symbol is used by a reloc. */ | |
11816 | h->indx = -2; | |
11817 | *rel_hash_ptr = h; | |
11818 | indx = 0; | |
11819 | } | |
11820 | else | |
11821 | { | |
1a72702b AM |
11822 | (*info->callbacks->unattached_reloc) |
11823 | (info, link_order->u.reloc.p->u.name, NULL, NULL, 0); | |
c152c796 AM |
11824 | indx = 0; |
11825 | } | |
11826 | } | |
11827 | ||
11828 | /* If this is an inplace reloc, we must write the addend into the | |
11829 | object file. */ | |
11830 | if (howto->partial_inplace && addend != 0) | |
11831 | { | |
11832 | bfd_size_type size; | |
11833 | bfd_reloc_status_type rstat; | |
11834 | bfd_byte *buf; | |
0a1b45a2 | 11835 | bool ok; |
c152c796 | 11836 | const char *sym_name; |
bb294208 | 11837 | bfd_size_type octets; |
c152c796 | 11838 | |
a50b1753 NC |
11839 | size = (bfd_size_type) bfd_get_reloc_size (howto); |
11840 | buf = (bfd_byte *) bfd_zmalloc (size); | |
6346d5ca | 11841 | if (buf == NULL && size != 0) |
0a1b45a2 | 11842 | return false; |
c152c796 AM |
11843 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); |
11844 | switch (rstat) | |
11845 | { | |
11846 | case bfd_reloc_ok: | |
11847 | break; | |
11848 | ||
11849 | default: | |
11850 | case bfd_reloc_outofrange: | |
11851 | abort (); | |
11852 | ||
11853 | case bfd_reloc_overflow: | |
11854 | if (link_order->type == bfd_section_reloc_link_order) | |
fd361982 | 11855 | sym_name = bfd_section_name (link_order->u.reloc.p->u.section); |
c152c796 AM |
11856 | else |
11857 | sym_name = link_order->u.reloc.p->u.name; | |
1a72702b AM |
11858 | (*info->callbacks->reloc_overflow) (info, NULL, sym_name, |
11859 | howto->name, addend, NULL, NULL, | |
11860 | (bfd_vma) 0); | |
c152c796 AM |
11861 | break; |
11862 | } | |
37b01f6a | 11863 | |
bb294208 AM |
11864 | octets = link_order->offset * bfd_octets_per_byte (output_bfd, |
11865 | output_section); | |
c152c796 | 11866 | ok = bfd_set_section_contents (output_bfd, output_section, buf, |
bb294208 | 11867 | octets, size); |
c152c796 AM |
11868 | free (buf); |
11869 | if (! ok) | |
0a1b45a2 | 11870 | return false; |
c152c796 AM |
11871 | } |
11872 | ||
11873 | /* The address of a reloc is relative to the section in a | |
11874 | relocatable file, and is a virtual address in an executable | |
11875 | file. */ | |
11876 | offset = link_order->offset; | |
0e1862bb | 11877 | if (! bfd_link_relocatable (info)) |
c152c796 AM |
11878 | offset += output_section->vma; |
11879 | ||
11880 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) | |
11881 | { | |
11882 | irel[i].r_offset = offset; | |
11883 | irel[i].r_info = 0; | |
11884 | irel[i].r_addend = 0; | |
11885 | } | |
11886 | if (bed->s->arch_size == 32) | |
11887 | irel[0].r_info = ELF32_R_INFO (indx, howto->type); | |
11888 | else | |
11889 | irel[0].r_info = ELF64_R_INFO (indx, howto->type); | |
11890 | ||
d4730f92 | 11891 | rel_hdr = reldata->hdr; |
c152c796 AM |
11892 | erel = rel_hdr->contents; |
11893 | if (rel_hdr->sh_type == SHT_REL) | |
11894 | { | |
d4730f92 | 11895 | erel += reldata->count * bed->s->sizeof_rel; |
c152c796 AM |
11896 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); |
11897 | } | |
11898 | else | |
11899 | { | |
11900 | irel[0].r_addend = addend; | |
d4730f92 | 11901 | erel += reldata->count * bed->s->sizeof_rela; |
c152c796 AM |
11902 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); |
11903 | } | |
11904 | ||
d4730f92 | 11905 | ++reldata->count; |
c152c796 | 11906 | |
0a1b45a2 | 11907 | return true; |
c152c796 AM |
11908 | } |
11909 | ||
76359541 TP |
11910 | /* Generate an import library in INFO->implib_bfd from symbols in ABFD. |
11911 | Returns TRUE upon success, FALSE otherwise. */ | |
11912 | ||
0a1b45a2 | 11913 | static bool |
76359541 TP |
11914 | elf_output_implib (bfd *abfd, struct bfd_link_info *info) |
11915 | { | |
0a1b45a2 | 11916 | bool ret = false; |
76359541 TP |
11917 | bfd *implib_bfd; |
11918 | const struct elf_backend_data *bed; | |
11919 | flagword flags; | |
11920 | enum bfd_architecture arch; | |
11921 | unsigned int mach; | |
11922 | asymbol **sympp = NULL; | |
11923 | long symsize; | |
11924 | long symcount; | |
11925 | long src_count; | |
11926 | elf_symbol_type *osymbuf; | |
446f7ed5 | 11927 | size_t amt; |
76359541 TP |
11928 | |
11929 | implib_bfd = info->out_implib_bfd; | |
11930 | bed = get_elf_backend_data (abfd); | |
11931 | ||
11932 | if (!bfd_set_format (implib_bfd, bfd_object)) | |
0a1b45a2 | 11933 | return false; |
76359541 | 11934 | |
046734ff | 11935 | /* Use flag from executable but make it a relocatable object. */ |
76359541 TP |
11936 | flags = bfd_get_file_flags (abfd); |
11937 | flags &= ~HAS_RELOC; | |
11938 | if (!bfd_set_start_address (implib_bfd, 0) | |
046734ff | 11939 | || !bfd_set_file_flags (implib_bfd, flags & ~EXEC_P)) |
0a1b45a2 | 11940 | return false; |
76359541 TP |
11941 | |
11942 | /* Copy architecture of output file to import library file. */ | |
11943 | arch = bfd_get_arch (abfd); | |
11944 | mach = bfd_get_mach (abfd); | |
11945 | if (!bfd_set_arch_mach (implib_bfd, arch, mach) | |
11946 | && (abfd->target_defaulted | |
11947 | || bfd_get_arch (abfd) != bfd_get_arch (implib_bfd))) | |
0a1b45a2 | 11948 | return false; |
76359541 TP |
11949 | |
11950 | /* Get symbol table size. */ | |
11951 | symsize = bfd_get_symtab_upper_bound (abfd); | |
11952 | if (symsize < 0) | |
0a1b45a2 | 11953 | return false; |
76359541 TP |
11954 | |
11955 | /* Read in the symbol table. */ | |
ec9bd0a2 AM |
11956 | sympp = (asymbol **) bfd_malloc (symsize); |
11957 | if (sympp == NULL) | |
0a1b45a2 | 11958 | return false; |
ec9bd0a2 | 11959 | |
76359541 TP |
11960 | symcount = bfd_canonicalize_symtab (abfd, sympp); |
11961 | if (symcount < 0) | |
11962 | goto free_sym_buf; | |
11963 | ||
11964 | /* Allow the BFD backend to copy any private header data it | |
11965 | understands from the output BFD to the import library BFD. */ | |
11966 | if (! bfd_copy_private_header_data (abfd, implib_bfd)) | |
11967 | goto free_sym_buf; | |
11968 | ||
11969 | /* Filter symbols to appear in the import library. */ | |
11970 | if (bed->elf_backend_filter_implib_symbols) | |
11971 | symcount = bed->elf_backend_filter_implib_symbols (abfd, info, sympp, | |
11972 | symcount); | |
11973 | else | |
11974 | symcount = _bfd_elf_filter_global_symbols (abfd, info, sympp, symcount); | |
11975 | if (symcount == 0) | |
11976 | { | |
5df1bc57 | 11977 | bfd_set_error (bfd_error_no_symbols); |
871b3ab2 | 11978 | _bfd_error_handler (_("%pB: no symbol found for import library"), |
4eca0228 | 11979 | implib_bfd); |
76359541 TP |
11980 | goto free_sym_buf; |
11981 | } | |
11982 | ||
11983 | ||
11984 | /* Make symbols absolute. */ | |
446f7ed5 AM |
11985 | amt = symcount * sizeof (*osymbuf); |
11986 | osymbuf = (elf_symbol_type *) bfd_alloc (implib_bfd, amt); | |
ec9bd0a2 AM |
11987 | if (osymbuf == NULL) |
11988 | goto free_sym_buf; | |
11989 | ||
76359541 TP |
11990 | for (src_count = 0; src_count < symcount; src_count++) |
11991 | { | |
11992 | memcpy (&osymbuf[src_count], (elf_symbol_type *) sympp[src_count], | |
11993 | sizeof (*osymbuf)); | |
11994 | osymbuf[src_count].symbol.section = bfd_abs_section_ptr; | |
11995 | osymbuf[src_count].internal_elf_sym.st_shndx = SHN_ABS; | |
11996 | osymbuf[src_count].symbol.value += sympp[src_count]->section->vma; | |
11997 | osymbuf[src_count].internal_elf_sym.st_value = | |
11998 | osymbuf[src_count].symbol.value; | |
11999 | sympp[src_count] = &osymbuf[src_count].symbol; | |
12000 | } | |
12001 | ||
12002 | bfd_set_symtab (implib_bfd, sympp, symcount); | |
12003 | ||
12004 | /* Allow the BFD backend to copy any private data it understands | |
12005 | from the output BFD to the import library BFD. This is done last | |
12006 | to permit the routine to look at the filtered symbol table. */ | |
12007 | if (! bfd_copy_private_bfd_data (abfd, implib_bfd)) | |
12008 | goto free_sym_buf; | |
12009 | ||
12010 | if (!bfd_close (implib_bfd)) | |
12011 | goto free_sym_buf; | |
12012 | ||
0a1b45a2 | 12013 | ret = true; |
76359541 | 12014 | |
dc1e8a47 | 12015 | free_sym_buf: |
76359541 TP |
12016 | free (sympp); |
12017 | return ret; | |
12018 | } | |
12019 | ||
9f7c3e5e AM |
12020 | static void |
12021 | elf_final_link_free (bfd *obfd, struct elf_final_link_info *flinfo) | |
12022 | { | |
12023 | asection *o; | |
12024 | ||
12025 | if (flinfo->symstrtab != NULL) | |
ef10c3ac | 12026 | _bfd_elf_strtab_free (flinfo->symstrtab); |
c9594989 AM |
12027 | free (flinfo->contents); |
12028 | free (flinfo->external_relocs); | |
12029 | free (flinfo->internal_relocs); | |
12030 | free (flinfo->external_syms); | |
12031 | free (flinfo->locsym_shndx); | |
12032 | free (flinfo->internal_syms); | |
12033 | free (flinfo->indices); | |
12034 | free (flinfo->sections); | |
12035 | if (flinfo->symshndxbuf != (Elf_External_Sym_Shndx *) -1) | |
9f7c3e5e AM |
12036 | free (flinfo->symshndxbuf); |
12037 | for (o = obfd->sections; o != NULL; o = o->next) | |
12038 | { | |
12039 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
c9594989 AM |
12040 | free (esdo->rel.hashes); |
12041 | free (esdo->rela.hashes); | |
9f7c3e5e AM |
12042 | } |
12043 | } | |
0b52efa6 | 12044 | |
c152c796 AM |
12045 | /* Do the final step of an ELF link. */ |
12046 | ||
0a1b45a2 | 12047 | bool |
c152c796 AM |
12048 | bfd_elf_final_link (bfd *abfd, struct bfd_link_info *info) |
12049 | { | |
0a1b45a2 AM |
12050 | bool dynamic; |
12051 | bool emit_relocs; | |
c152c796 | 12052 | bfd *dynobj; |
8b127cbc | 12053 | struct elf_final_link_info flinfo; |
91d6fa6a NC |
12054 | asection *o; |
12055 | struct bfd_link_order *p; | |
12056 | bfd *sub; | |
c152c796 AM |
12057 | bfd_size_type max_contents_size; |
12058 | bfd_size_type max_external_reloc_size; | |
12059 | bfd_size_type max_internal_reloc_count; | |
12060 | bfd_size_type max_sym_count; | |
12061 | bfd_size_type max_sym_shndx_count; | |
c152c796 AM |
12062 | Elf_Internal_Sym elfsym; |
12063 | unsigned int i; | |
12064 | Elf_Internal_Shdr *symtab_hdr; | |
12065 | Elf_Internal_Shdr *symtab_shndx_hdr; | |
c152c796 AM |
12066 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
12067 | struct elf_outext_info eoinfo; | |
0a1b45a2 | 12068 | bool merged; |
c152c796 AM |
12069 | size_t relativecount = 0; |
12070 | asection *reldyn = 0; | |
12071 | bfd_size_type amt; | |
104d59d1 JM |
12072 | asection *attr_section = NULL; |
12073 | bfd_vma attr_size = 0; | |
12074 | const char *std_attrs_section; | |
64f52338 | 12075 | struct elf_link_hash_table *htab = elf_hash_table (info); |
0a1b45a2 AM |
12076 | bool sections_removed; |
12077 | bool ret; | |
c152c796 | 12078 | |
64f52338 | 12079 | if (!is_elf_hash_table (htab)) |
0a1b45a2 | 12080 | return false; |
c152c796 | 12081 | |
0e1862bb | 12082 | if (bfd_link_pic (info)) |
c152c796 AM |
12083 | abfd->flags |= DYNAMIC; |
12084 | ||
64f52338 AM |
12085 | dynamic = htab->dynamic_sections_created; |
12086 | dynobj = htab->dynobj; | |
c152c796 | 12087 | |
0e1862bb | 12088 | emit_relocs = (bfd_link_relocatable (info) |
a4676736 | 12089 | || info->emitrelocations); |
c152c796 | 12090 | |
496afd17 | 12091 | memset (&flinfo, 0, sizeof (flinfo)); |
8b127cbc AM |
12092 | flinfo.info = info; |
12093 | flinfo.output_bfd = abfd; | |
ef10c3ac | 12094 | flinfo.symstrtab = _bfd_elf_strtab_init (); |
8b127cbc | 12095 | if (flinfo.symstrtab == NULL) |
0a1b45a2 | 12096 | return false; |
c152c796 AM |
12097 | |
12098 | if (! dynamic) | |
12099 | { | |
8b127cbc AM |
12100 | flinfo.hash_sec = NULL; |
12101 | flinfo.symver_sec = NULL; | |
c152c796 AM |
12102 | } |
12103 | else | |
12104 | { | |
3d4d4302 | 12105 | flinfo.hash_sec = bfd_get_linker_section (dynobj, ".hash"); |
202e2356 | 12106 | /* Note that dynsym_sec can be NULL (on VMS). */ |
3d4d4302 | 12107 | flinfo.symver_sec = bfd_get_linker_section (dynobj, ".gnu.version"); |
c152c796 AM |
12108 | /* Note that it is OK if symver_sec is NULL. */ |
12109 | } | |
12110 | ||
496afd17 L |
12111 | if (info->unique_symbol |
12112 | && !bfd_hash_table_init (&flinfo.local_hash_table, | |
12113 | local_hash_newfunc, | |
12114 | sizeof (struct local_hash_entry))) | |
0a1b45a2 | 12115 | return false; |
c152c796 | 12116 | |
104d59d1 JM |
12117 | /* The object attributes have been merged. Remove the input |
12118 | sections from the link, and set the contents of the output | |
1ff6de03 | 12119 | section. */ |
0a1b45a2 | 12120 | sections_removed = false; |
104d59d1 JM |
12121 | std_attrs_section = get_elf_backend_data (abfd)->obj_attrs_section; |
12122 | for (o = abfd->sections; o != NULL; o = o->next) | |
12123 | { | |
0a1b45a2 | 12124 | bool remove_section = false; |
b8a6ced7 | 12125 | |
104d59d1 JM |
12126 | if ((std_attrs_section && strcmp (o->name, std_attrs_section) == 0) |
12127 | || strcmp (o->name, ".gnu.attributes") == 0) | |
12128 | { | |
12129 | for (p = o->map_head.link_order; p != NULL; p = p->next) | |
12130 | { | |
12131 | asection *input_section; | |
12132 | ||
12133 | if (p->type != bfd_indirect_link_order) | |
12134 | continue; | |
12135 | input_section = p->u.indirect.section; | |
12136 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
12137 | elf_link_input_bfd ignores this section. */ | |
12138 | input_section->flags &= ~SEC_HAS_CONTENTS; | |
12139 | } | |
a0c8462f | 12140 | |
104d59d1 | 12141 | attr_size = bfd_elf_obj_attr_size (abfd); |
fd361982 | 12142 | bfd_set_section_size (o, attr_size); |
b8a6ced7 AM |
12143 | /* Skip this section later on. */ |
12144 | o->map_head.link_order = NULL; | |
104d59d1 | 12145 | if (attr_size) |
b8a6ced7 | 12146 | attr_section = o; |
104d59d1 | 12147 | else |
0a1b45a2 | 12148 | remove_section = true; |
104d59d1 | 12149 | } |
6e5e9d58 AM |
12150 | else if ((o->flags & SEC_GROUP) != 0 && o->size == 0) |
12151 | { | |
12152 | /* Remove empty group section from linker output. */ | |
0a1b45a2 | 12153 | remove_section = true; |
b8a6ced7 | 12154 | } |
5270eddc | 12155 | if (remove_section) |
b8a6ced7 | 12156 | { |
6e5e9d58 AM |
12157 | o->flags |= SEC_EXCLUDE; |
12158 | bfd_section_list_remove (abfd, o); | |
12159 | abfd->section_count--; | |
0a1b45a2 | 12160 | sections_removed = true; |
6e5e9d58 | 12161 | } |
104d59d1 | 12162 | } |
4c6ee646 AM |
12163 | if (sections_removed) |
12164 | _bfd_fix_excluded_sec_syms (abfd, info); | |
104d59d1 | 12165 | |
c152c796 AM |
12166 | /* Count up the number of relocations we will output for each output |
12167 | section, so that we know the sizes of the reloc sections. We | |
12168 | also figure out some maximum sizes. */ | |
12169 | max_contents_size = 0; | |
12170 | max_external_reloc_size = 0; | |
12171 | max_internal_reloc_count = 0; | |
12172 | max_sym_count = 0; | |
12173 | max_sym_shndx_count = 0; | |
0a1b45a2 | 12174 | merged = false; |
c152c796 AM |
12175 | for (o = abfd->sections; o != NULL; o = o->next) |
12176 | { | |
12177 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
12178 | o->reloc_count = 0; | |
12179 | ||
8423293d | 12180 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
12181 | { |
12182 | unsigned int reloc_count = 0; | |
9eaff861 | 12183 | unsigned int additional_reloc_count = 0; |
c152c796 | 12184 | struct bfd_elf_section_data *esdi = NULL; |
c152c796 AM |
12185 | |
12186 | if (p->type == bfd_section_reloc_link_order | |
12187 | || p->type == bfd_symbol_reloc_link_order) | |
12188 | reloc_count = 1; | |
12189 | else if (p->type == bfd_indirect_link_order) | |
12190 | { | |
12191 | asection *sec; | |
12192 | ||
12193 | sec = p->u.indirect.section; | |
c152c796 AM |
12194 | |
12195 | /* Mark all sections which are to be included in the | |
12196 | link. This will normally be every section. We need | |
12197 | to do this so that we can identify any sections which | |
12198 | the linker has decided to not include. */ | |
0a1b45a2 | 12199 | sec->linker_mark = true; |
c152c796 AM |
12200 | |
12201 | if (sec->flags & SEC_MERGE) | |
0a1b45a2 | 12202 | merged = true; |
c152c796 | 12203 | |
eea6121a AM |
12204 | if (sec->rawsize > max_contents_size) |
12205 | max_contents_size = sec->rawsize; | |
12206 | if (sec->size > max_contents_size) | |
12207 | max_contents_size = sec->size; | |
c152c796 | 12208 | |
c152c796 AM |
12209 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour |
12210 | && (sec->owner->flags & DYNAMIC) == 0) | |
12211 | { | |
12212 | size_t sym_count; | |
12213 | ||
a961cdd5 AM |
12214 | /* We are interested in just local symbols, not all |
12215 | symbols. */ | |
c152c796 AM |
12216 | if (elf_bad_symtab (sec->owner)) |
12217 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
12218 | / bed->s->sizeof_sym); | |
12219 | else | |
12220 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
12221 | ||
12222 | if (sym_count > max_sym_count) | |
12223 | max_sym_count = sym_count; | |
12224 | ||
12225 | if (sym_count > max_sym_shndx_count | |
6a40cf0c | 12226 | && elf_symtab_shndx_list (sec->owner) != NULL) |
c152c796 AM |
12227 | max_sym_shndx_count = sym_count; |
12228 | ||
a961cdd5 AM |
12229 | if (esdo->this_hdr.sh_type == SHT_REL |
12230 | || esdo->this_hdr.sh_type == SHT_RELA) | |
12231 | /* Some backends use reloc_count in relocation sections | |
12232 | to count particular types of relocs. Of course, | |
12233 | reloc sections themselves can't have relocations. */ | |
12234 | ; | |
12235 | else if (emit_relocs) | |
12236 | { | |
12237 | reloc_count = sec->reloc_count; | |
12238 | if (bed->elf_backend_count_additional_relocs) | |
12239 | { | |
12240 | int c; | |
12241 | c = (*bed->elf_backend_count_additional_relocs) (sec); | |
12242 | additional_reloc_count += c; | |
12243 | } | |
12244 | } | |
12245 | else if (bed->elf_backend_count_relocs) | |
12246 | reloc_count = (*bed->elf_backend_count_relocs) (info, sec); | |
12247 | ||
12248 | esdi = elf_section_data (sec); | |
12249 | ||
c152c796 AM |
12250 | if ((sec->flags & SEC_RELOC) != 0) |
12251 | { | |
d4730f92 | 12252 | size_t ext_size = 0; |
c152c796 | 12253 | |
d4730f92 BS |
12254 | if (esdi->rel.hdr != NULL) |
12255 | ext_size = esdi->rel.hdr->sh_size; | |
12256 | if (esdi->rela.hdr != NULL) | |
12257 | ext_size += esdi->rela.hdr->sh_size; | |
7326c758 | 12258 | |
c152c796 AM |
12259 | if (ext_size > max_external_reloc_size) |
12260 | max_external_reloc_size = ext_size; | |
12261 | if (sec->reloc_count > max_internal_reloc_count) | |
12262 | max_internal_reloc_count = sec->reloc_count; | |
12263 | } | |
12264 | } | |
12265 | } | |
12266 | ||
12267 | if (reloc_count == 0) | |
12268 | continue; | |
12269 | ||
9eaff861 | 12270 | reloc_count += additional_reloc_count; |
c152c796 AM |
12271 | o->reloc_count += reloc_count; |
12272 | ||
0e1862bb | 12273 | if (p->type == bfd_indirect_link_order && emit_relocs) |
c152c796 | 12274 | { |
d4730f92 | 12275 | if (esdi->rel.hdr) |
9eaff861 | 12276 | { |
491d01d3 | 12277 | esdo->rel.count += NUM_SHDR_ENTRIES (esdi->rel.hdr); |
9eaff861 AO |
12278 | esdo->rel.count += additional_reloc_count; |
12279 | } | |
d4730f92 | 12280 | if (esdi->rela.hdr) |
9eaff861 | 12281 | { |
491d01d3 | 12282 | esdo->rela.count += NUM_SHDR_ENTRIES (esdi->rela.hdr); |
9eaff861 AO |
12283 | esdo->rela.count += additional_reloc_count; |
12284 | } | |
d4730f92 BS |
12285 | } |
12286 | else | |
12287 | { | |
12288 | if (o->use_rela_p) | |
12289 | esdo->rela.count += reloc_count; | |
2c2b4ed4 | 12290 | else |
d4730f92 | 12291 | esdo->rel.count += reloc_count; |
c152c796 | 12292 | } |
c152c796 AM |
12293 | } |
12294 | ||
9eaff861 | 12295 | if (o->reloc_count > 0) |
c152c796 AM |
12296 | o->flags |= SEC_RELOC; |
12297 | else | |
12298 | { | |
12299 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
12300 | set it (this is probably a bug) and if it is set | |
12301 | assign_section_numbers will create a reloc section. */ | |
12302 | o->flags &=~ SEC_RELOC; | |
12303 | } | |
12304 | ||
12305 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
12306 | zero. This is done in elf_fake_sections as well, but forcing | |
12307 | the VMA to 0 here will ensure that relocs against these | |
12308 | sections are handled correctly. */ | |
12309 | if ((o->flags & SEC_ALLOC) == 0 | |
12310 | && ! o->user_set_vma) | |
12311 | o->vma = 0; | |
12312 | } | |
12313 | ||
0e1862bb | 12314 | if (! bfd_link_relocatable (info) && merged) |
64f52338 | 12315 | elf_link_hash_traverse (htab, _bfd_elf_link_sec_merge_syms, abfd); |
c152c796 AM |
12316 | |
12317 | /* Figure out the file positions for everything but the symbol table | |
12318 | and the relocs. We set symcount to force assign_section_numbers | |
12319 | to create a symbol table. */ | |
ed48ec2e | 12320 | abfd->symcount = info->strip != strip_all || emit_relocs; |
c152c796 AM |
12321 | BFD_ASSERT (! abfd->output_has_begun); |
12322 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
12323 | goto error_return; | |
12324 | ||
ee75fd95 | 12325 | /* Set sizes, and assign file positions for reloc sections. */ |
c152c796 AM |
12326 | for (o = abfd->sections; o != NULL; o = o->next) |
12327 | { | |
d4730f92 | 12328 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
c152c796 AM |
12329 | if ((o->flags & SEC_RELOC) != 0) |
12330 | { | |
d4730f92 | 12331 | if (esdo->rel.hdr |
9eaff861 | 12332 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rel))) |
c152c796 AM |
12333 | goto error_return; |
12334 | ||
d4730f92 | 12335 | if (esdo->rela.hdr |
9eaff861 | 12336 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rela))) |
c152c796 AM |
12337 | goto error_return; |
12338 | } | |
12339 | ||
48db3297 AM |
12340 | /* _bfd_elf_compute_section_file_positions makes temporary use |
12341 | of target_index. Reset it. */ | |
12342 | o->target_index = 0; | |
12343 | ||
c152c796 AM |
12344 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them |
12345 | to count upwards while actually outputting the relocations. */ | |
d4730f92 BS |
12346 | esdo->rel.count = 0; |
12347 | esdo->rela.count = 0; | |
0ce398f1 | 12348 | |
1ff6de03 NA |
12349 | if ((esdo->this_hdr.sh_offset == (file_ptr) -1) |
12350 | && !bfd_section_is_ctf (o)) | |
0ce398f1 L |
12351 | { |
12352 | /* Cache the section contents so that they can be compressed | |
12353 | later. Use bfd_malloc since it will be freed by | |
12354 | bfd_compress_section_contents. */ | |
12355 | unsigned char *contents = esdo->this_hdr.contents; | |
12356 | if ((o->flags & SEC_ELF_COMPRESS) == 0 || contents != NULL) | |
12357 | abort (); | |
12358 | contents | |
12359 | = (unsigned char *) bfd_malloc (esdo->this_hdr.sh_size); | |
12360 | if (contents == NULL) | |
12361 | goto error_return; | |
12362 | esdo->this_hdr.contents = contents; | |
12363 | } | |
c152c796 AM |
12364 | } |
12365 | ||
1ff6de03 NA |
12366 | /* We have now assigned file positions for all the sections except .symtab, |
12367 | .strtab, and non-loaded reloc and compressed debugging sections. We start | |
12368 | the .symtab section at the current file position, and write directly to it. | |
12369 | We build the .strtab section in memory. */ | |
ed48ec2e | 12370 | abfd->symcount = 0; |
c152c796 AM |
12371 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
12372 | /* sh_name is set in prep_headers. */ | |
12373 | symtab_hdr->sh_type = SHT_SYMTAB; | |
12374 | /* sh_flags, sh_addr and sh_size all start off zero. */ | |
12375 | symtab_hdr->sh_entsize = bed->s->sizeof_sym; | |
12376 | /* sh_link is set in assign_section_numbers. */ | |
12377 | /* sh_info is set below. */ | |
12378 | /* sh_offset is set just below. */ | |
72de5009 | 12379 | symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align; |
c152c796 | 12380 | |
ef10c3ac L |
12381 | if (max_sym_count < 20) |
12382 | max_sym_count = 20; | |
64f52338 | 12383 | htab->strtabsize = max_sym_count; |
ef10c3ac | 12384 | amt = max_sym_count * sizeof (struct elf_sym_strtab); |
64f52338 AM |
12385 | htab->strtab = (struct elf_sym_strtab *) bfd_malloc (amt); |
12386 | if (htab->strtab == NULL) | |
c152c796 | 12387 | goto error_return; |
ef10c3ac L |
12388 | /* The real buffer will be allocated in elf_link_swap_symbols_out. */ |
12389 | flinfo.symshndxbuf | |
12390 | = (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF) | |
12391 | ? (Elf_External_Sym_Shndx *) -1 : NULL); | |
c152c796 | 12392 | |
8539e4e8 | 12393 | if (info->strip != strip_all || emit_relocs) |
c152c796 | 12394 | { |
8539e4e8 AM |
12395 | file_ptr off = elf_next_file_pos (abfd); |
12396 | ||
0a1b45a2 | 12397 | _bfd_elf_assign_file_position_for_section (symtab_hdr, off, true); |
8539e4e8 AM |
12398 | |
12399 | /* Note that at this point elf_next_file_pos (abfd) is | |
12400 | incorrect. We do not yet know the size of the .symtab section. | |
12401 | We correct next_file_pos below, after we do know the size. */ | |
12402 | ||
12403 | /* Start writing out the symbol table. The first symbol is always a | |
12404 | dummy symbol. */ | |
c152c796 AM |
12405 | elfsym.st_value = 0; |
12406 | elfsym.st_size = 0; | |
12407 | elfsym.st_info = 0; | |
12408 | elfsym.st_other = 0; | |
12409 | elfsym.st_shndx = SHN_UNDEF; | |
35fc36a8 | 12410 | elfsym.st_target_internal = 0; |
ef10c3ac L |
12411 | if (elf_link_output_symstrtab (&flinfo, NULL, &elfsym, |
12412 | bfd_und_section_ptr, NULL) != 1) | |
c152c796 | 12413 | goto error_return; |
c152c796 | 12414 | |
d1bcae83 L |
12415 | /* Output a symbol for each section if asked or they are used for |
12416 | relocs. These symbols usually have no names. We store the | |
12417 | index of each one in the index field of the section, so that | |
12418 | we can find it again when outputting relocs. */ | |
c77cb2a0 | 12419 | |
d1bcae83 | 12420 | if (bfd_keep_unused_section_symbols (abfd) || emit_relocs) |
c152c796 | 12421 | { |
0a1b45a2 | 12422 | bool name_local_sections |
d1bcae83 L |
12423 | = (bed->elf_backend_name_local_section_symbols |
12424 | && bed->elf_backend_name_local_section_symbols (abfd)); | |
12425 | const char *name = NULL; | |
12426 | ||
12427 | elfsym.st_size = 0; | |
12428 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
12429 | elfsym.st_other = 0; | |
12430 | elfsym.st_value = 0; | |
12431 | elfsym.st_target_internal = 0; | |
12432 | for (i = 1; i < elf_numsections (abfd); i++) | |
f0b5bb34 | 12433 | { |
d1bcae83 L |
12434 | o = bfd_section_from_elf_index (abfd, i); |
12435 | if (o != NULL) | |
12436 | { | |
12437 | o->target_index = bfd_get_symcount (abfd); | |
12438 | elfsym.st_shndx = i; | |
12439 | if (!bfd_link_relocatable (info)) | |
12440 | elfsym.st_value = o->vma; | |
12441 | if (name_local_sections) | |
12442 | name = o->name; | |
12443 | if (elf_link_output_symstrtab (&flinfo, name, &elfsym, o, | |
12444 | NULL) != 1) | |
12445 | goto error_return; | |
12446 | } | |
f0b5bb34 | 12447 | } |
c152c796 AM |
12448 | } |
12449 | } | |
12450 | ||
3f1b17bb MR |
12451 | /* On some targets like Irix 5 the symbol split between local and global |
12452 | ones recorded in the sh_info field needs to be done between section | |
12453 | and all other symbols. */ | |
12454 | if (bed->elf_backend_elfsym_local_is_section | |
12455 | && bed->elf_backend_elfsym_local_is_section (abfd)) | |
12456 | symtab_hdr->sh_info = bfd_get_symcount (abfd); | |
12457 | ||
c152c796 AM |
12458 | /* Allocate some memory to hold information read in from the input |
12459 | files. */ | |
12460 | if (max_contents_size != 0) | |
12461 | { | |
8b127cbc AM |
12462 | flinfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
12463 | if (flinfo.contents == NULL) | |
c152c796 AM |
12464 | goto error_return; |
12465 | } | |
12466 | ||
12467 | if (max_external_reloc_size != 0) | |
12468 | { | |
8b127cbc AM |
12469 | flinfo.external_relocs = bfd_malloc (max_external_reloc_size); |
12470 | if (flinfo.external_relocs == NULL) | |
c152c796 AM |
12471 | goto error_return; |
12472 | } | |
12473 | ||
12474 | if (max_internal_reloc_count != 0) | |
12475 | { | |
056bafd4 | 12476 | amt = max_internal_reloc_count * sizeof (Elf_Internal_Rela); |
8b127cbc AM |
12477 | flinfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); |
12478 | if (flinfo.internal_relocs == NULL) | |
c152c796 AM |
12479 | goto error_return; |
12480 | } | |
12481 | ||
12482 | if (max_sym_count != 0) | |
12483 | { | |
12484 | amt = max_sym_count * bed->s->sizeof_sym; | |
8b127cbc AM |
12485 | flinfo.external_syms = (bfd_byte *) bfd_malloc (amt); |
12486 | if (flinfo.external_syms == NULL) | |
c152c796 AM |
12487 | goto error_return; |
12488 | ||
12489 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
8b127cbc AM |
12490 | flinfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt); |
12491 | if (flinfo.internal_syms == NULL) | |
c152c796 AM |
12492 | goto error_return; |
12493 | ||
12494 | amt = max_sym_count * sizeof (long); | |
8b127cbc AM |
12495 | flinfo.indices = (long int *) bfd_malloc (amt); |
12496 | if (flinfo.indices == NULL) | |
c152c796 AM |
12497 | goto error_return; |
12498 | ||
12499 | amt = max_sym_count * sizeof (asection *); | |
8b127cbc AM |
12500 | flinfo.sections = (asection **) bfd_malloc (amt); |
12501 | if (flinfo.sections == NULL) | |
c152c796 AM |
12502 | goto error_return; |
12503 | } | |
12504 | ||
12505 | if (max_sym_shndx_count != 0) | |
12506 | { | |
12507 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
8b127cbc AM |
12508 | flinfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); |
12509 | if (flinfo.locsym_shndx == NULL) | |
c152c796 AM |
12510 | goto error_return; |
12511 | } | |
12512 | ||
64f52338 | 12513 | if (htab->tls_sec) |
c152c796 | 12514 | { |
66631823 | 12515 | bfd_vma base, end = 0; /* Both bytes. */ |
c152c796 AM |
12516 | asection *sec; |
12517 | ||
64f52338 | 12518 | for (sec = htab->tls_sec; |
c152c796 AM |
12519 | sec && (sec->flags & SEC_THREAD_LOCAL); |
12520 | sec = sec->next) | |
12521 | { | |
3a800eb9 | 12522 | bfd_size_type size = sec->size; |
66631823 | 12523 | unsigned int opb = bfd_octets_per_byte (abfd, sec); |
c152c796 | 12524 | |
3a800eb9 AM |
12525 | if (size == 0 |
12526 | && (sec->flags & SEC_HAS_CONTENTS) == 0) | |
c152c796 | 12527 | { |
91d6fa6a NC |
12528 | struct bfd_link_order *ord = sec->map_tail.link_order; |
12529 | ||
12530 | if (ord != NULL) | |
66631823 | 12531 | size = ord->offset * opb + ord->size; |
c152c796 | 12532 | } |
66631823 | 12533 | end = sec->vma + size / opb; |
c152c796 | 12534 | } |
64f52338 | 12535 | base = htab->tls_sec->vma; |
7dc98aea RO |
12536 | /* Only align end of TLS section if static TLS doesn't have special |
12537 | alignment requirements. */ | |
12538 | if (bed->static_tls_alignment == 1) | |
64f52338 AM |
12539 | end = align_power (end, htab->tls_sec->alignment_power); |
12540 | htab->tls_size = end - base; | |
c152c796 AM |
12541 | } |
12542 | ||
2f0c68f2 | 12543 | if (!_bfd_elf_fixup_eh_frame_hdr (info)) |
0a1b45a2 | 12544 | return false; |
2f0c68f2 | 12545 | |
c152c796 AM |
12546 | /* Since ELF permits relocations to be against local symbols, we |
12547 | must have the local symbols available when we do the relocations. | |
12548 | Since we would rather only read the local symbols once, and we | |
12549 | would rather not keep them in memory, we handle all the | |
12550 | relocations for a single input file at the same time. | |
12551 | ||
12552 | Unfortunately, there is no way to know the total number of local | |
12553 | symbols until we have seen all of them, and the local symbol | |
12554 | indices precede the global symbol indices. This means that when | |
12555 | we are generating relocatable output, and we see a reloc against | |
12556 | a global symbol, we can not know the symbol index until we have | |
12557 | finished examining all the local symbols to see which ones we are | |
12558 | going to output. To deal with this, we keep the relocations in | |
12559 | memory, and don't output them until the end of the link. This is | |
12560 | an unfortunate waste of memory, but I don't see a good way around | |
12561 | it. Fortunately, it only happens when performing a relocatable | |
12562 | link, which is not the common case. FIXME: If keep_memory is set | |
12563 | we could write the relocs out and then read them again; I don't | |
12564 | know how bad the memory loss will be. */ | |
12565 | ||
c72f2fb2 | 12566 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
0a1b45a2 | 12567 | sub->output_has_begun = false; |
c152c796 AM |
12568 | for (o = abfd->sections; o != NULL; o = o->next) |
12569 | { | |
8423293d | 12570 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
12571 | { |
12572 | if (p->type == bfd_indirect_link_order | |
12573 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) | |
12574 | == bfd_target_elf_flavour) | |
12575 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) | |
12576 | { | |
12577 | if (! sub->output_has_begun) | |
12578 | { | |
8b127cbc | 12579 | if (! elf_link_input_bfd (&flinfo, sub)) |
c152c796 | 12580 | goto error_return; |
0a1b45a2 | 12581 | sub->output_has_begun = true; |
c152c796 AM |
12582 | } |
12583 | } | |
12584 | else if (p->type == bfd_section_reloc_link_order | |
12585 | || p->type == bfd_symbol_reloc_link_order) | |
12586 | { | |
12587 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
12588 | goto error_return; | |
12589 | } | |
12590 | else | |
12591 | { | |
12592 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
351f65ca L |
12593 | { |
12594 | if (p->type == bfd_indirect_link_order | |
12595 | && (bfd_get_flavour (sub) | |
12596 | == bfd_target_elf_flavour) | |
12597 | && (elf_elfheader (sub)->e_ident[EI_CLASS] | |
12598 | != bed->s->elfclass)) | |
12599 | { | |
12600 | const char *iclass, *oclass; | |
12601 | ||
aebf9be7 | 12602 | switch (bed->s->elfclass) |
351f65ca | 12603 | { |
aebf9be7 NC |
12604 | case ELFCLASS64: oclass = "ELFCLASS64"; break; |
12605 | case ELFCLASS32: oclass = "ELFCLASS32"; break; | |
12606 | case ELFCLASSNONE: oclass = "ELFCLASSNONE"; break; | |
12607 | default: abort (); | |
351f65ca | 12608 | } |
aebf9be7 NC |
12609 | |
12610 | switch (elf_elfheader (sub)->e_ident[EI_CLASS]) | |
351f65ca | 12611 | { |
aebf9be7 NC |
12612 | case ELFCLASS64: iclass = "ELFCLASS64"; break; |
12613 | case ELFCLASS32: iclass = "ELFCLASS32"; break; | |
12614 | case ELFCLASSNONE: iclass = "ELFCLASSNONE"; break; | |
12615 | default: abort (); | |
351f65ca L |
12616 | } |
12617 | ||
12618 | bfd_set_error (bfd_error_wrong_format); | |
4eca0228 | 12619 | _bfd_error_handler |
695344c0 | 12620 | /* xgettext:c-format */ |
871b3ab2 | 12621 | (_("%pB: file class %s incompatible with %s"), |
351f65ca L |
12622 | sub, iclass, oclass); |
12623 | } | |
12624 | ||
12625 | goto error_return; | |
12626 | } | |
c152c796 AM |
12627 | } |
12628 | } | |
12629 | } | |
12630 | ||
c0f00686 L |
12631 | /* Free symbol buffer if needed. */ |
12632 | if (!info->reduce_memory_overheads) | |
12633 | { | |
c72f2fb2 | 12634 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c9594989 | 12635 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour) |
c0f00686 L |
12636 | { |
12637 | free (elf_tdata (sub)->symbuf); | |
12638 | elf_tdata (sub)->symbuf = NULL; | |
12639 | } | |
12640 | } | |
12641 | ||
0a1b45a2 | 12642 | ret = true; |
496afd17 | 12643 | |
c152c796 AM |
12644 | /* Output any global symbols that got converted to local in a |
12645 | version script or due to symbol visibility. We do this in a | |
12646 | separate step since ELF requires all local symbols to appear | |
12647 | prior to any global symbols. FIXME: We should only do this if | |
12648 | some global symbols were, in fact, converted to become local. | |
12649 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
0a1b45a2 | 12650 | eoinfo.failed = false; |
8b127cbc | 12651 | eoinfo.flinfo = &flinfo; |
0a1b45a2 AM |
12652 | eoinfo.localsyms = true; |
12653 | eoinfo.file_sym_done = false; | |
7686d77d | 12654 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 | 12655 | if (eoinfo.failed) |
496afd17 | 12656 | { |
0a1b45a2 | 12657 | ret = false; |
496afd17 L |
12658 | goto return_local_hash_table; |
12659 | } | |
c152c796 | 12660 | |
4e617b1e PB |
12661 | /* If backend needs to output some local symbols not present in the hash |
12662 | table, do it now. */ | |
8539e4e8 AM |
12663 | if (bed->elf_backend_output_arch_local_syms |
12664 | && (info->strip != strip_all || emit_relocs)) | |
4e617b1e | 12665 | { |
4e617b1e | 12666 | if (! ((*bed->elf_backend_output_arch_local_syms) |
37bb890f | 12667 | (abfd, info, &flinfo, elf_link_output_symstrtab))) |
496afd17 | 12668 | { |
0a1b45a2 | 12669 | ret = false; |
496afd17 L |
12670 | goto return_local_hash_table; |
12671 | } | |
4e617b1e PB |
12672 | } |
12673 | ||
c152c796 AM |
12674 | /* That wrote out all the local symbols. Finish up the symbol table |
12675 | with the global symbols. Even if we want to strip everything we | |
12676 | can, we still need to deal with those global symbols that got | |
12677 | converted to local in a version script. */ | |
12678 | ||
12679 | /* The sh_info field records the index of the first non local symbol. */ | |
3f1b17bb MR |
12680 | if (!symtab_hdr->sh_info) |
12681 | symtab_hdr->sh_info = bfd_get_symcount (abfd); | |
c152c796 AM |
12682 | |
12683 | if (dynamic | |
64f52338 AM |
12684 | && htab->dynsym != NULL |
12685 | && htab->dynsym->output_section != bfd_abs_section_ptr) | |
c152c796 AM |
12686 | { |
12687 | Elf_Internal_Sym sym; | |
64f52338 | 12688 | bfd_byte *dynsym = htab->dynsym->contents; |
90ac2420 | 12689 | |
64f52338 AM |
12690 | o = htab->dynsym->output_section; |
12691 | elf_section_data (o)->this_hdr.sh_info = htab->local_dynsymcount + 1; | |
c152c796 AM |
12692 | |
12693 | /* Write out the section symbols for the output sections. */ | |
0e1862bb | 12694 | if (bfd_link_pic (info) |
64f52338 | 12695 | || htab->is_relocatable_executable) |
c152c796 AM |
12696 | { |
12697 | asection *s; | |
12698 | ||
12699 | sym.st_size = 0; | |
12700 | sym.st_name = 0; | |
12701 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
12702 | sym.st_other = 0; | |
35fc36a8 | 12703 | sym.st_target_internal = 0; |
c152c796 AM |
12704 | |
12705 | for (s = abfd->sections; s != NULL; s = s->next) | |
12706 | { | |
12707 | int indx; | |
12708 | bfd_byte *dest; | |
12709 | long dynindx; | |
12710 | ||
c152c796 | 12711 | dynindx = elf_section_data (s)->dynindx; |
8c37241b JJ |
12712 | if (dynindx <= 0) |
12713 | continue; | |
12714 | indx = elf_section_data (s)->this_idx; | |
c152c796 AM |
12715 | BFD_ASSERT (indx > 0); |
12716 | sym.st_shndx = indx; | |
c0d5a53d | 12717 | if (! check_dynsym (abfd, &sym)) |
496afd17 | 12718 | { |
0a1b45a2 | 12719 | ret = false; |
496afd17 L |
12720 | goto return_local_hash_table; |
12721 | } | |
c152c796 AM |
12722 | sym.st_value = s->vma; |
12723 | dest = dynsym + dynindx * bed->s->sizeof_sym; | |
3d16b64e NA |
12724 | |
12725 | /* Inform the linker of the addition of this symbol. */ | |
12726 | ||
12727 | if (info->callbacks->ctf_new_dynsym) | |
12728 | info->callbacks->ctf_new_dynsym (dynindx, &sym); | |
12729 | ||
c152c796 AM |
12730 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); |
12731 | } | |
c152c796 AM |
12732 | } |
12733 | ||
12734 | /* Write out the local dynsyms. */ | |
64f52338 | 12735 | if (htab->dynlocal) |
c152c796 AM |
12736 | { |
12737 | struct elf_link_local_dynamic_entry *e; | |
64f52338 | 12738 | for (e = htab->dynlocal; e ; e = e->next) |
c152c796 AM |
12739 | { |
12740 | asection *s; | |
12741 | bfd_byte *dest; | |
12742 | ||
935bd1e0 | 12743 | /* Copy the internal symbol and turn off visibility. |
c152c796 AM |
12744 | Note that we saved a word of storage and overwrote |
12745 | the original st_name with the dynstr_index. */ | |
12746 | sym = e->isym; | |
935bd1e0 | 12747 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); |
4d68fd75 | 12748 | sym.st_shndx = SHN_UNDEF; |
c152c796 | 12749 | |
cb33740c AM |
12750 | s = bfd_section_from_elf_index (e->input_bfd, |
12751 | e->isym.st_shndx); | |
4d68fd75 AM |
12752 | if (s != NULL |
12753 | && s->output_section != NULL | |
12754 | && elf_section_data (s->output_section) != NULL) | |
c152c796 | 12755 | { |
c152c796 AM |
12756 | sym.st_shndx = |
12757 | elf_section_data (s->output_section)->this_idx; | |
c0d5a53d | 12758 | if (! check_dynsym (abfd, &sym)) |
496afd17 | 12759 | { |
0a1b45a2 | 12760 | ret = false; |
496afd17 L |
12761 | goto return_local_hash_table; |
12762 | } | |
c152c796 AM |
12763 | sym.st_value = (s->output_section->vma |
12764 | + s->output_offset | |
12765 | + e->isym.st_value); | |
12766 | } | |
12767 | ||
3d16b64e NA |
12768 | /* Inform the linker of the addition of this symbol. */ |
12769 | ||
12770 | if (info->callbacks->ctf_new_dynsym) | |
12771 | info->callbacks->ctf_new_dynsym (e->dynindx, &sym); | |
12772 | ||
c152c796 AM |
12773 | dest = dynsym + e->dynindx * bed->s->sizeof_sym; |
12774 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); | |
12775 | } | |
12776 | } | |
c152c796 AM |
12777 | } |
12778 | ||
12779 | /* We get the global symbols from the hash table. */ | |
0a1b45a2 AM |
12780 | eoinfo.failed = false; |
12781 | eoinfo.localsyms = false; | |
8b127cbc | 12782 | eoinfo.flinfo = &flinfo; |
7686d77d | 12783 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 | 12784 | if (eoinfo.failed) |
496afd17 | 12785 | { |
0a1b45a2 | 12786 | ret = false; |
496afd17 L |
12787 | goto return_local_hash_table; |
12788 | } | |
c152c796 AM |
12789 | |
12790 | /* If backend needs to output some symbols not present in the hash | |
12791 | table, do it now. */ | |
8539e4e8 AM |
12792 | if (bed->elf_backend_output_arch_syms |
12793 | && (info->strip != strip_all || emit_relocs)) | |
c152c796 | 12794 | { |
c152c796 | 12795 | if (! ((*bed->elf_backend_output_arch_syms) |
37bb890f | 12796 | (abfd, info, &flinfo, elf_link_output_symstrtab))) |
496afd17 | 12797 | { |
0a1b45a2 | 12798 | ret = false; |
496afd17 L |
12799 | goto return_local_hash_table; |
12800 | } | |
c152c796 AM |
12801 | } |
12802 | ||
ef10c3ac L |
12803 | /* Finalize the .strtab section. */ |
12804 | _bfd_elf_strtab_finalize (flinfo.symstrtab); | |
12805 | ||
12806 | /* Swap out the .strtab section. */ | |
12807 | if (!elf_link_swap_symbols_out (&flinfo)) | |
496afd17 | 12808 | { |
0a1b45a2 | 12809 | ret = false; |
496afd17 L |
12810 | goto return_local_hash_table; |
12811 | } | |
c152c796 AM |
12812 | |
12813 | /* Now we know the size of the symtab section. */ | |
c152c796 AM |
12814 | if (bfd_get_symcount (abfd) > 0) |
12815 | { | |
ee3b52e9 L |
12816 | /* Finish up and write out the symbol string table (.strtab) |
12817 | section. */ | |
ad32986f | 12818 | Elf_Internal_Shdr *symstrtab_hdr = NULL; |
8539e4e8 AM |
12819 | file_ptr off = symtab_hdr->sh_offset + symtab_hdr->sh_size; |
12820 | ||
ad32986f | 12821 | if (elf_symtab_shndx_list (abfd)) |
8539e4e8 | 12822 | { |
ad32986f | 12823 | symtab_shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; |
8539e4e8 | 12824 | |
ad32986f NC |
12825 | if (symtab_shndx_hdr != NULL && symtab_shndx_hdr->sh_name != 0) |
12826 | { | |
12827 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
12828 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
12829 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
12830 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
12831 | symtab_shndx_hdr->sh_size = amt; | |
8539e4e8 | 12832 | |
ad32986f | 12833 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, |
0a1b45a2 | 12834 | off, true); |
ad32986f NC |
12835 | |
12836 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
12837 | || (bfd_bwrite (flinfo.symshndxbuf, amt, abfd) != amt)) | |
496afd17 | 12838 | { |
0a1b45a2 | 12839 | ret = false; |
496afd17 L |
12840 | goto return_local_hash_table; |
12841 | } | |
ad32986f | 12842 | } |
8539e4e8 | 12843 | } |
ee3b52e9 L |
12844 | |
12845 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
12846 | /* sh_name was set in prep_headers. */ | |
12847 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
84865015 | 12848 | symstrtab_hdr->sh_flags = bed->elf_strtab_flags; |
ee3b52e9 | 12849 | symstrtab_hdr->sh_addr = 0; |
ef10c3ac | 12850 | symstrtab_hdr->sh_size = _bfd_elf_strtab_size (flinfo.symstrtab); |
ee3b52e9 L |
12851 | symstrtab_hdr->sh_entsize = 0; |
12852 | symstrtab_hdr->sh_link = 0; | |
12853 | symstrtab_hdr->sh_info = 0; | |
12854 | /* sh_offset is set just below. */ | |
12855 | symstrtab_hdr->sh_addralign = 1; | |
12856 | ||
12857 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, | |
0a1b45a2 | 12858 | off, true); |
ee3b52e9 L |
12859 | elf_next_file_pos (abfd) = off; |
12860 | ||
c152c796 | 12861 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 |
ef10c3ac | 12862 | || ! _bfd_elf_strtab_emit (abfd, flinfo.symstrtab)) |
496afd17 | 12863 | { |
0a1b45a2 | 12864 | ret = false; |
496afd17 L |
12865 | goto return_local_hash_table; |
12866 | } | |
c152c796 AM |
12867 | } |
12868 | ||
76359541 TP |
12869 | if (info->out_implib_bfd && !elf_output_implib (abfd, info)) |
12870 | { | |
871b3ab2 | 12871 | _bfd_error_handler (_("%pB: failed to generate import library"), |
4eca0228 | 12872 | info->out_implib_bfd); |
0a1b45a2 | 12873 | ret = false; |
496afd17 | 12874 | goto return_local_hash_table; |
76359541 TP |
12875 | } |
12876 | ||
c152c796 AM |
12877 | /* Adjust the relocs to have the correct symbol indices. */ |
12878 | for (o = abfd->sections; o != NULL; o = o->next) | |
12879 | { | |
d4730f92 | 12880 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
0a1b45a2 | 12881 | bool sort; |
10bbbc1d | 12882 | |
c152c796 AM |
12883 | if ((o->flags & SEC_RELOC) == 0) |
12884 | continue; | |
12885 | ||
28dbcedc | 12886 | sort = bed->sort_relocs_p == NULL || (*bed->sort_relocs_p) (o); |
bca6d0e3 | 12887 | if (esdo->rel.hdr != NULL |
10bbbc1d | 12888 | && !elf_link_adjust_relocs (abfd, o, &esdo->rel, sort, info)) |
496afd17 | 12889 | { |
0a1b45a2 | 12890 | ret = false; |
496afd17 L |
12891 | goto return_local_hash_table; |
12892 | } | |
bca6d0e3 | 12893 | if (esdo->rela.hdr != NULL |
10bbbc1d | 12894 | && !elf_link_adjust_relocs (abfd, o, &esdo->rela, sort, info)) |
496afd17 | 12895 | { |
0a1b45a2 | 12896 | ret = false; |
496afd17 L |
12897 | goto return_local_hash_table; |
12898 | } | |
c152c796 AM |
12899 | |
12900 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
12901 | trying to swap the relocs out itself. */ | |
12902 | o->reloc_count = 0; | |
12903 | } | |
12904 | ||
12905 | if (dynamic && info->combreloc && dynobj != NULL) | |
12906 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
12907 | ||
12908 | /* If we are linking against a dynamic object, or generating a | |
12909 | shared library, finish up the dynamic linking information. */ | |
12910 | if (dynamic) | |
12911 | { | |
12912 | bfd_byte *dyncon, *dynconend; | |
12913 | ||
12914 | /* Fix up .dynamic entries. */ | |
3d4d4302 | 12915 | o = bfd_get_linker_section (dynobj, ".dynamic"); |
c152c796 AM |
12916 | BFD_ASSERT (o != NULL); |
12917 | ||
12918 | dyncon = o->contents; | |
eea6121a | 12919 | dynconend = o->contents + o->size; |
c152c796 AM |
12920 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) |
12921 | { | |
12922 | Elf_Internal_Dyn dyn; | |
12923 | const char *name; | |
12924 | unsigned int type; | |
64487780 AM |
12925 | bfd_size_type sh_size; |
12926 | bfd_vma sh_addr; | |
c152c796 AM |
12927 | |
12928 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
12929 | ||
12930 | switch (dyn.d_tag) | |
12931 | { | |
12932 | default: | |
12933 | continue; | |
12934 | case DT_NULL: | |
12935 | if (relativecount > 0 && dyncon + bed->s->sizeof_dyn < dynconend) | |
12936 | { | |
12937 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
12938 | { | |
12939 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
12940 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
12941 | default: continue; | |
12942 | } | |
12943 | dyn.d_un.d_val = relativecount; | |
12944 | relativecount = 0; | |
12945 | break; | |
12946 | } | |
12947 | continue; | |
12948 | ||
12949 | case DT_INIT: | |
12950 | name = info->init_function; | |
12951 | goto get_sym; | |
12952 | case DT_FINI: | |
12953 | name = info->fini_function; | |
12954 | get_sym: | |
12955 | { | |
12956 | struct elf_link_hash_entry *h; | |
12957 | ||
0a1b45a2 | 12958 | h = elf_link_hash_lookup (htab, name, false, false, true); |
c152c796 AM |
12959 | if (h != NULL |
12960 | && (h->root.type == bfd_link_hash_defined | |
12961 | || h->root.type == bfd_link_hash_defweak)) | |
12962 | { | |
bef26483 | 12963 | dyn.d_un.d_ptr = h->root.u.def.value; |
c152c796 AM |
12964 | o = h->root.u.def.section; |
12965 | if (o->output_section != NULL) | |
bef26483 | 12966 | dyn.d_un.d_ptr += (o->output_section->vma |
c152c796 AM |
12967 | + o->output_offset); |
12968 | else | |
12969 | { | |
12970 | /* The symbol is imported from another shared | |
12971 | library and does not apply to this one. */ | |
bef26483 | 12972 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
12973 | } |
12974 | break; | |
12975 | } | |
12976 | } | |
12977 | continue; | |
12978 | ||
12979 | case DT_PREINIT_ARRAYSZ: | |
12980 | name = ".preinit_array"; | |
4ade44b7 | 12981 | goto get_out_size; |
c152c796 AM |
12982 | case DT_INIT_ARRAYSZ: |
12983 | name = ".init_array"; | |
4ade44b7 | 12984 | goto get_out_size; |
c152c796 AM |
12985 | case DT_FINI_ARRAYSZ: |
12986 | name = ".fini_array"; | |
4ade44b7 | 12987 | get_out_size: |
c152c796 AM |
12988 | o = bfd_get_section_by_name (abfd, name); |
12989 | if (o == NULL) | |
12990 | { | |
4eca0228 | 12991 | _bfd_error_handler |
4ade44b7 | 12992 | (_("could not find section %s"), name); |
c152c796 AM |
12993 | goto error_return; |
12994 | } | |
eea6121a | 12995 | if (o->size == 0) |
4eca0228 | 12996 | _bfd_error_handler |
c152c796 | 12997 | (_("warning: %s section has zero size"), name); |
eea6121a | 12998 | dyn.d_un.d_val = o->size; |
c152c796 AM |
12999 | break; |
13000 | ||
13001 | case DT_PREINIT_ARRAY: | |
13002 | name = ".preinit_array"; | |
4ade44b7 | 13003 | goto get_out_vma; |
c152c796 AM |
13004 | case DT_INIT_ARRAY: |
13005 | name = ".init_array"; | |
4ade44b7 | 13006 | goto get_out_vma; |
c152c796 AM |
13007 | case DT_FINI_ARRAY: |
13008 | name = ".fini_array"; | |
4ade44b7 AM |
13009 | get_out_vma: |
13010 | o = bfd_get_section_by_name (abfd, name); | |
13011 | goto do_vma; | |
c152c796 AM |
13012 | |
13013 | case DT_HASH: | |
13014 | name = ".hash"; | |
13015 | goto get_vma; | |
fdc90cb4 JJ |
13016 | case DT_GNU_HASH: |
13017 | name = ".gnu.hash"; | |
13018 | goto get_vma; | |
c152c796 AM |
13019 | case DT_STRTAB: |
13020 | name = ".dynstr"; | |
13021 | goto get_vma; | |
13022 | case DT_SYMTAB: | |
13023 | name = ".dynsym"; | |
13024 | goto get_vma; | |
13025 | case DT_VERDEF: | |
13026 | name = ".gnu.version_d"; | |
13027 | goto get_vma; | |
13028 | case DT_VERNEED: | |
13029 | name = ".gnu.version_r"; | |
13030 | goto get_vma; | |
13031 | case DT_VERSYM: | |
13032 | name = ".gnu.version"; | |
13033 | get_vma: | |
4ade44b7 AM |
13034 | o = bfd_get_linker_section (dynobj, name); |
13035 | do_vma: | |
b3293efa | 13036 | if (o == NULL || bfd_is_abs_section (o->output_section)) |
c152c796 | 13037 | { |
4eca0228 | 13038 | _bfd_error_handler |
4ade44b7 | 13039 | (_("could not find section %s"), name); |
c152c796 AM |
13040 | goto error_return; |
13041 | } | |
894891db NC |
13042 | if (elf_section_data (o->output_section)->this_hdr.sh_type == SHT_NOTE) |
13043 | { | |
4eca0228 | 13044 | _bfd_error_handler |
894891db NC |
13045 | (_("warning: section '%s' is being made into a note"), name); |
13046 | bfd_set_error (bfd_error_nonrepresentable_section); | |
13047 | goto error_return; | |
13048 | } | |
4ade44b7 | 13049 | dyn.d_un.d_ptr = o->output_section->vma + o->output_offset; |
c152c796 AM |
13050 | break; |
13051 | ||
13052 | case DT_REL: | |
13053 | case DT_RELA: | |
13054 | case DT_RELSZ: | |
13055 | case DT_RELASZ: | |
13056 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
13057 | type = SHT_REL; | |
13058 | else | |
13059 | type = SHT_RELA; | |
64487780 AM |
13060 | sh_size = 0; |
13061 | sh_addr = 0; | |
c152c796 AM |
13062 | for (i = 1; i < elf_numsections (abfd); i++) |
13063 | { | |
13064 | Elf_Internal_Shdr *hdr; | |
13065 | ||
13066 | hdr = elf_elfsections (abfd)[i]; | |
13067 | if (hdr->sh_type == type | |
13068 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
13069 | { | |
64487780 AM |
13070 | sh_size += hdr->sh_size; |
13071 | if (sh_addr == 0 | |
13072 | || sh_addr > hdr->sh_addr) | |
13073 | sh_addr = hdr->sh_addr; | |
c152c796 AM |
13074 | } |
13075 | } | |
64487780 | 13076 | |
64f52338 AM |
13077 | if (bed->dtrel_excludes_plt && htab->srelplt != NULL) |
13078 | { | |
66631823 CE |
13079 | unsigned int opb = bfd_octets_per_byte (abfd, o); |
13080 | ||
64f52338 AM |
13081 | /* Don't count procedure linkage table relocs in the |
13082 | overall reloc count. */ | |
64487780 AM |
13083 | sh_size -= htab->srelplt->size; |
13084 | if (sh_size == 0) | |
13085 | /* If the size is zero, make the address zero too. | |
13086 | This is to avoid a glibc bug. If the backend | |
13087 | emits DT_RELA/DT_RELASZ even when DT_RELASZ is | |
13088 | zero, then we'll put DT_RELA at the end of | |
13089 | DT_JMPREL. glibc will interpret the end of | |
13090 | DT_RELA matching the end of DT_JMPREL as the | |
13091 | case where DT_RELA includes DT_JMPREL, and for | |
13092 | LD_BIND_NOW will decide that processing DT_RELA | |
13093 | will process the PLT relocs too. Net result: | |
13094 | No PLT relocs applied. */ | |
13095 | sh_addr = 0; | |
13096 | ||
64f52338 AM |
13097 | /* If .rela.plt is the first .rela section, exclude |
13098 | it from DT_RELA. */ | |
64487780 | 13099 | else if (sh_addr == (htab->srelplt->output_section->vma |
66631823 | 13100 | + htab->srelplt->output_offset) * opb) |
64487780 | 13101 | sh_addr += htab->srelplt->size; |
64f52338 | 13102 | } |
64487780 AM |
13103 | |
13104 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
13105 | dyn.d_un.d_val = sh_size; | |
13106 | else | |
13107 | dyn.d_un.d_ptr = sh_addr; | |
c152c796 AM |
13108 | break; |
13109 | } | |
13110 | bed->s->swap_dyn_out (dynobj, &dyn, dyncon); | |
13111 | } | |
13112 | } | |
13113 | ||
13114 | /* If we have created any dynamic sections, then output them. */ | |
13115 | if (dynobj != NULL) | |
13116 | { | |
13117 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
13118 | goto error_return; | |
13119 | ||
943284cc | 13120 | /* Check for DT_TEXTREL (late, in case the backend removes it). */ |
a6dbf402 | 13121 | if (bfd_link_textrel_check (info) |
3d4d4302 | 13122 | && (o = bfd_get_linker_section (dynobj, ".dynamic")) != NULL) |
943284cc DJ |
13123 | { |
13124 | bfd_byte *dyncon, *dynconend; | |
13125 | ||
943284cc DJ |
13126 | dyncon = o->contents; |
13127 | dynconend = o->contents + o->size; | |
13128 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) | |
13129 | { | |
13130 | Elf_Internal_Dyn dyn; | |
13131 | ||
13132 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
13133 | ||
13134 | if (dyn.d_tag == DT_TEXTREL) | |
13135 | { | |
a6dbf402 | 13136 | if (info->textrel_check == textrel_check_error) |
c192a133 | 13137 | info->callbacks->einfo |
9793eb77 | 13138 | (_("%P%X: read-only segment has dynamic relocations\n")); |
a6dbf402 L |
13139 | else if (bfd_link_dll (info)) |
13140 | info->callbacks->einfo | |
13141 | (_("%P: warning: creating DT_TEXTREL in a shared object\n")); | |
c192a133 AM |
13142 | else |
13143 | info->callbacks->einfo | |
a6dbf402 | 13144 | (_("%P: warning: creating DT_TEXTREL in a PIE\n")); |
943284cc DJ |
13145 | break; |
13146 | } | |
13147 | } | |
13148 | } | |
13149 | ||
c152c796 AM |
13150 | for (o = dynobj->sections; o != NULL; o = o->next) |
13151 | { | |
13152 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
eea6121a | 13153 | || o->size == 0 |
c152c796 AM |
13154 | || o->output_section == bfd_abs_section_ptr) |
13155 | continue; | |
13156 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
13157 | { | |
13158 | /* At this point, we are only interested in sections | |
13159 | created by _bfd_elf_link_create_dynamic_sections. */ | |
13160 | continue; | |
13161 | } | |
64f52338 | 13162 | if (htab->stab_info.stabstr == o) |
3722b82f | 13163 | continue; |
64f52338 | 13164 | if (htab->eh_info.hdr_sec == o) |
eea6121a | 13165 | continue; |
3d4d4302 | 13166 | if (strcmp (o->name, ".dynstr") != 0) |
c152c796 | 13167 | { |
bb294208 AM |
13168 | bfd_size_type octets = ((file_ptr) o->output_offset |
13169 | * bfd_octets_per_byte (abfd, o)); | |
13170 | if (!bfd_set_section_contents (abfd, o->output_section, | |
13171 | o->contents, octets, o->size)) | |
c152c796 AM |
13172 | goto error_return; |
13173 | } | |
13174 | else | |
13175 | { | |
13176 | /* The contents of the .dynstr section are actually in a | |
13177 | stringtab. */ | |
8539e4e8 AM |
13178 | file_ptr off; |
13179 | ||
c152c796 AM |
13180 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
13181 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
64f52338 | 13182 | || !_bfd_elf_strtab_emit (abfd, htab->dynstr)) |
c152c796 AM |
13183 | goto error_return; |
13184 | } | |
13185 | } | |
13186 | } | |
13187 | ||
7bdf4127 | 13188 | if (!info->resolve_section_groups) |
c152c796 | 13189 | { |
0a1b45a2 | 13190 | bool failed = false; |
c152c796 | 13191 | |
7bdf4127 | 13192 | BFD_ASSERT (bfd_link_relocatable (info)); |
c152c796 AM |
13193 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); |
13194 | if (failed) | |
13195 | goto error_return; | |
13196 | } | |
13197 | ||
13198 | /* If we have optimized stabs strings, output them. */ | |
64f52338 | 13199 | if (htab->stab_info.stabstr != NULL) |
c152c796 | 13200 | { |
64f52338 | 13201 | if (!_bfd_write_stab_strings (abfd, &htab->stab_info)) |
c152c796 AM |
13202 | goto error_return; |
13203 | } | |
13204 | ||
9f7c3e5e AM |
13205 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
13206 | goto error_return; | |
c152c796 | 13207 | |
1ff6de03 NA |
13208 | if (info->callbacks->emit_ctf) |
13209 | info->callbacks->emit_ctf (); | |
13210 | ||
9f7c3e5e | 13211 | elf_final_link_free (abfd, &flinfo); |
c152c796 | 13212 | |
104d59d1 JM |
13213 | if (attr_section) |
13214 | { | |
a50b1753 | 13215 | bfd_byte *contents = (bfd_byte *) bfd_malloc (attr_size); |
104d59d1 | 13216 | if (contents == NULL) |
496afd17 L |
13217 | { |
13218 | /* Bail out and fail. */ | |
0a1b45a2 | 13219 | ret = false; |
496afd17 L |
13220 | goto return_local_hash_table; |
13221 | } | |
104d59d1 JM |
13222 | bfd_elf_set_obj_attr_contents (abfd, contents, attr_size); |
13223 | bfd_set_section_contents (abfd, attr_section, contents, 0, attr_size); | |
13224 | free (contents); | |
13225 | } | |
13226 | ||
496afd17 L |
13227 | return_local_hash_table: |
13228 | if (info->unique_symbol) | |
13229 | bfd_hash_table_free (&flinfo.local_hash_table); | |
13230 | return ret; | |
c152c796 AM |
13231 | |
13232 | error_return: | |
9f7c3e5e | 13233 | elf_final_link_free (abfd, &flinfo); |
0a1b45a2 | 13234 | ret = false; |
496afd17 | 13235 | goto return_local_hash_table; |
c152c796 AM |
13236 | } |
13237 | \f | |
5241d853 RS |
13238 | /* Initialize COOKIE for input bfd ABFD. */ |
13239 | ||
0a1b45a2 | 13240 | static bool |
5241d853 RS |
13241 | init_reloc_cookie (struct elf_reloc_cookie *cookie, |
13242 | struct bfd_link_info *info, bfd *abfd) | |
13243 | { | |
13244 | Elf_Internal_Shdr *symtab_hdr; | |
13245 | const struct elf_backend_data *bed; | |
13246 | ||
13247 | bed = get_elf_backend_data (abfd); | |
13248 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
13249 | ||
13250 | cookie->abfd = abfd; | |
13251 | cookie->sym_hashes = elf_sym_hashes (abfd); | |
13252 | cookie->bad_symtab = elf_bad_symtab (abfd); | |
13253 | if (cookie->bad_symtab) | |
13254 | { | |
13255 | cookie->locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
13256 | cookie->extsymoff = 0; | |
13257 | } | |
13258 | else | |
13259 | { | |
13260 | cookie->locsymcount = symtab_hdr->sh_info; | |
13261 | cookie->extsymoff = symtab_hdr->sh_info; | |
13262 | } | |
13263 | ||
13264 | if (bed->s->arch_size == 32) | |
13265 | cookie->r_sym_shift = 8; | |
13266 | else | |
13267 | cookie->r_sym_shift = 32; | |
13268 | ||
13269 | cookie->locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
13270 | if (cookie->locsyms == NULL && cookie->locsymcount != 0) | |
13271 | { | |
13272 | cookie->locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
13273 | cookie->locsymcount, 0, | |
13274 | NULL, NULL, NULL); | |
13275 | if (cookie->locsyms == NULL) | |
13276 | { | |
13277 | info->callbacks->einfo (_("%P%X: can not read symbols: %E\n")); | |
0a1b45a2 | 13278 | return false; |
5241d853 RS |
13279 | } |
13280 | if (info->keep_memory) | |
13281 | symtab_hdr->contents = (bfd_byte *) cookie->locsyms; | |
13282 | } | |
0a1b45a2 | 13283 | return true; |
5241d853 RS |
13284 | } |
13285 | ||
13286 | /* Free the memory allocated by init_reloc_cookie, if appropriate. */ | |
13287 | ||
13288 | static void | |
13289 | fini_reloc_cookie (struct elf_reloc_cookie *cookie, bfd *abfd) | |
13290 | { | |
13291 | Elf_Internal_Shdr *symtab_hdr; | |
13292 | ||
13293 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
c9594989 | 13294 | if (symtab_hdr->contents != (unsigned char *) cookie->locsyms) |
5241d853 RS |
13295 | free (cookie->locsyms); |
13296 | } | |
13297 | ||
13298 | /* Initialize the relocation information in COOKIE for input section SEC | |
13299 | of input bfd ABFD. */ | |
13300 | ||
0a1b45a2 | 13301 | static bool |
5241d853 RS |
13302 | init_reloc_cookie_rels (struct elf_reloc_cookie *cookie, |
13303 | struct bfd_link_info *info, bfd *abfd, | |
13304 | asection *sec) | |
13305 | { | |
5241d853 RS |
13306 | if (sec->reloc_count == 0) |
13307 | { | |
13308 | cookie->rels = NULL; | |
13309 | cookie->relend = NULL; | |
13310 | } | |
13311 | else | |
13312 | { | |
5241d853 RS |
13313 | cookie->rels = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, |
13314 | info->keep_memory); | |
13315 | if (cookie->rels == NULL) | |
0a1b45a2 | 13316 | return false; |
5241d853 | 13317 | cookie->rel = cookie->rels; |
056bafd4 | 13318 | cookie->relend = cookie->rels + sec->reloc_count; |
5241d853 RS |
13319 | } |
13320 | cookie->rel = cookie->rels; | |
0a1b45a2 | 13321 | return true; |
5241d853 RS |
13322 | } |
13323 | ||
13324 | /* Free the memory allocated by init_reloc_cookie_rels, | |
13325 | if appropriate. */ | |
13326 | ||
13327 | static void | |
13328 | fini_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
13329 | asection *sec) | |
13330 | { | |
c9594989 | 13331 | if (elf_section_data (sec)->relocs != cookie->rels) |
5241d853 RS |
13332 | free (cookie->rels); |
13333 | } | |
13334 | ||
13335 | /* Initialize the whole of COOKIE for input section SEC. */ | |
13336 | ||
0a1b45a2 | 13337 | static bool |
5241d853 RS |
13338 | init_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, |
13339 | struct bfd_link_info *info, | |
13340 | asection *sec) | |
13341 | { | |
13342 | if (!init_reloc_cookie (cookie, info, sec->owner)) | |
13343 | goto error1; | |
13344 | if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec)) | |
13345 | goto error2; | |
0a1b45a2 | 13346 | return true; |
5241d853 RS |
13347 | |
13348 | error2: | |
13349 | fini_reloc_cookie (cookie, sec->owner); | |
13350 | error1: | |
0a1b45a2 | 13351 | return false; |
5241d853 RS |
13352 | } |
13353 | ||
13354 | /* Free the memory allocated by init_reloc_cookie_for_section, | |
13355 | if appropriate. */ | |
13356 | ||
13357 | static void | |
13358 | fini_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
13359 | asection *sec) | |
13360 | { | |
13361 | fini_reloc_cookie_rels (cookie, sec); | |
13362 | fini_reloc_cookie (cookie, sec->owner); | |
13363 | } | |
13364 | \f | |
c152c796 AM |
13365 | /* Garbage collect unused sections. */ |
13366 | ||
07adf181 AM |
13367 | /* Default gc_mark_hook. */ |
13368 | ||
13369 | asection * | |
13370 | _bfd_elf_gc_mark_hook (asection *sec, | |
13371 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
13372 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, | |
13373 | struct elf_link_hash_entry *h, | |
13374 | Elf_Internal_Sym *sym) | |
13375 | { | |
13376 | if (h != NULL) | |
13377 | { | |
13378 | switch (h->root.type) | |
13379 | { | |
13380 | case bfd_link_hash_defined: | |
13381 | case bfd_link_hash_defweak: | |
13382 | return h->root.u.def.section; | |
13383 | ||
13384 | case bfd_link_hash_common: | |
13385 | return h->root.u.c.p->section; | |
13386 | ||
13387 | default: | |
13388 | break; | |
13389 | } | |
13390 | } | |
13391 | else | |
13392 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
13393 | ||
13394 | return NULL; | |
13395 | } | |
13396 | ||
9e223787 | 13397 | /* Return the debug definition section. */ |
b7c871ed L |
13398 | |
13399 | static asection * | |
13400 | elf_gc_mark_debug_section (asection *sec ATTRIBUTE_UNUSED, | |
13401 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
13402 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, | |
13403 | struct elf_link_hash_entry *h, | |
9e223787 | 13404 | Elf_Internal_Sym *sym) |
b7c871ed | 13405 | { |
9e223787 L |
13406 | if (h != NULL) |
13407 | { | |
13408 | /* Return the global debug definition section. */ | |
13409 | if ((h->root.type == bfd_link_hash_defined | |
13410 | || h->root.type == bfd_link_hash_defweak) | |
13411 | && (h->root.u.def.section->flags & SEC_DEBUGGING) != 0) | |
13412 | return h->root.u.def.section; | |
13413 | } | |
13414 | else | |
13415 | { | |
13416 | /* Return the local debug definition section. */ | |
13417 | asection *isec = bfd_section_from_elf_index (sec->owner, | |
13418 | sym->st_shndx); | |
13419 | if ((isec->flags & SEC_DEBUGGING) != 0) | |
13420 | return isec; | |
13421 | } | |
b7c871ed L |
13422 | |
13423 | return NULL; | |
13424 | } | |
13425 | ||
5241d853 RS |
13426 | /* COOKIE->rel describes a relocation against section SEC, which is |
13427 | a section we've decided to keep. Return the section that contains | |
13428 | the relocation symbol, or NULL if no section contains it. */ | |
13429 | ||
13430 | asection * | |
13431 | _bfd_elf_gc_mark_rsec (struct bfd_link_info *info, asection *sec, | |
13432 | elf_gc_mark_hook_fn gc_mark_hook, | |
1cce69b9 | 13433 | struct elf_reloc_cookie *cookie, |
0a1b45a2 | 13434 | bool *start_stop) |
5241d853 RS |
13435 | { |
13436 | unsigned long r_symndx; | |
3024a17a | 13437 | struct elf_link_hash_entry *h, *hw; |
5241d853 RS |
13438 | |
13439 | r_symndx = cookie->rel->r_info >> cookie->r_sym_shift; | |
cf35638d | 13440 | if (r_symndx == STN_UNDEF) |
5241d853 RS |
13441 | return NULL; |
13442 | ||
13443 | if (r_symndx >= cookie->locsymcount | |
13444 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
13445 | { | |
0a1b45a2 | 13446 | bool was_marked; |
5789f845 | 13447 | |
5241d853 | 13448 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; |
263ddf68 L |
13449 | if (h == NULL) |
13450 | { | |
871b3ab2 | 13451 | info->callbacks->einfo (_("%F%P: corrupt input: %pB\n"), |
263ddf68 L |
13452 | sec->owner); |
13453 | return NULL; | |
13454 | } | |
5241d853 RS |
13455 | while (h->root.type == bfd_link_hash_indirect |
13456 | || h->root.type == bfd_link_hash_warning) | |
13457 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5789f845 AM |
13458 | |
13459 | was_marked = h->mark; | |
1d5316ab | 13460 | h->mark = 1; |
3024a17a AM |
13461 | /* Keep all aliases of the symbol too. If an object symbol |
13462 | needs to be copied into .dynbss then all of its aliases | |
13463 | should be present as dynamic symbols, not just the one used | |
13464 | on the copy relocation. */ | |
13465 | hw = h; | |
13466 | while (hw->is_weakalias) | |
13467 | { | |
13468 | hw = hw->u.alias; | |
13469 | hw->mark = 1; | |
13470 | } | |
1cce69b9 | 13471 | |
5789f845 | 13472 | if (!was_marked && h->start_stop && !h->root.ldscript_def) |
1cce69b9 | 13473 | { |
8ee10e86 AM |
13474 | if (info->start_stop_gc) |
13475 | return NULL; | |
13476 | ||
7dba9362 AM |
13477 | /* To work around a glibc bug, mark XXX input sections |
13478 | when there is a reference to __start_XXX or __stop_XXX | |
13479 | symbols. */ | |
8ee10e86 | 13480 | else if (start_stop != NULL) |
1cce69b9 | 13481 | { |
cbd0eecf | 13482 | asection *s = h->u2.start_stop_section; |
0a1b45a2 | 13483 | *start_stop = true; |
a6a4679f | 13484 | return s; |
1cce69b9 AM |
13485 | } |
13486 | } | |
13487 | ||
5241d853 RS |
13488 | return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL); |
13489 | } | |
13490 | ||
13491 | return (*gc_mark_hook) (sec, info, cookie->rel, NULL, | |
13492 | &cookie->locsyms[r_symndx]); | |
13493 | } | |
13494 | ||
13495 | /* COOKIE->rel describes a relocation against section SEC, which is | |
13496 | a section we've decided to keep. Mark the section that contains | |
9d0a14d3 | 13497 | the relocation symbol. */ |
5241d853 | 13498 | |
0a1b45a2 | 13499 | bool |
5241d853 RS |
13500 | _bfd_elf_gc_mark_reloc (struct bfd_link_info *info, |
13501 | asection *sec, | |
13502 | elf_gc_mark_hook_fn gc_mark_hook, | |
9d0a14d3 | 13503 | struct elf_reloc_cookie *cookie) |
5241d853 RS |
13504 | { |
13505 | asection *rsec; | |
0a1b45a2 | 13506 | bool start_stop = false; |
5241d853 | 13507 | |
1cce69b9 AM |
13508 | rsec = _bfd_elf_gc_mark_rsec (info, sec, gc_mark_hook, cookie, &start_stop); |
13509 | while (rsec != NULL) | |
5241d853 | 13510 | { |
1cce69b9 AM |
13511 | if (!rsec->gc_mark) |
13512 | { | |
13513 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour | |
13514 | || (rsec->owner->flags & DYNAMIC) != 0) | |
13515 | rsec->gc_mark = 1; | |
13516 | else if (!_bfd_elf_gc_mark (info, rsec, gc_mark_hook)) | |
0a1b45a2 | 13517 | return false; |
1cce69b9 AM |
13518 | } |
13519 | if (!start_stop) | |
13520 | break; | |
199af150 | 13521 | rsec = bfd_get_next_section_by_name (rsec->owner, rsec); |
5241d853 | 13522 | } |
0a1b45a2 | 13523 | return true; |
5241d853 RS |
13524 | } |
13525 | ||
07adf181 AM |
13526 | /* The mark phase of garbage collection. For a given section, mark |
13527 | it and any sections in this section's group, and all the sections | |
13528 | which define symbols to which it refers. */ | |
13529 | ||
0a1b45a2 | 13530 | bool |
ccfa59ea AM |
13531 | _bfd_elf_gc_mark (struct bfd_link_info *info, |
13532 | asection *sec, | |
6a5bb875 | 13533 | elf_gc_mark_hook_fn gc_mark_hook) |
c152c796 | 13534 | { |
0a1b45a2 | 13535 | bool ret; |
9d0a14d3 | 13536 | asection *group_sec, *eh_frame; |
c152c796 AM |
13537 | |
13538 | sec->gc_mark = 1; | |
13539 | ||
13540 | /* Mark all the sections in the group. */ | |
13541 | group_sec = elf_section_data (sec)->next_in_group; | |
13542 | if (group_sec && !group_sec->gc_mark) | |
ccfa59ea | 13543 | if (!_bfd_elf_gc_mark (info, group_sec, gc_mark_hook)) |
0a1b45a2 | 13544 | return false; |
c152c796 AM |
13545 | |
13546 | /* Look through the section relocs. */ | |
0a1b45a2 | 13547 | ret = true; |
9d0a14d3 RS |
13548 | eh_frame = elf_eh_frame_section (sec->owner); |
13549 | if ((sec->flags & SEC_RELOC) != 0 | |
13550 | && sec->reloc_count > 0 | |
13551 | && sec != eh_frame) | |
c152c796 | 13552 | { |
5241d853 | 13553 | struct elf_reloc_cookie cookie; |
c152c796 | 13554 | |
5241d853 | 13555 | if (!init_reloc_cookie_for_section (&cookie, info, sec)) |
0a1b45a2 | 13556 | ret = false; |
c152c796 | 13557 | else |
c152c796 | 13558 | { |
5241d853 | 13559 | for (; cookie.rel < cookie.relend; cookie.rel++) |
9d0a14d3 | 13560 | if (!_bfd_elf_gc_mark_reloc (info, sec, gc_mark_hook, &cookie)) |
5241d853 | 13561 | { |
0a1b45a2 | 13562 | ret = false; |
5241d853 RS |
13563 | break; |
13564 | } | |
13565 | fini_reloc_cookie_for_section (&cookie, sec); | |
c152c796 AM |
13566 | } |
13567 | } | |
9d0a14d3 RS |
13568 | |
13569 | if (ret && eh_frame && elf_fde_list (sec)) | |
13570 | { | |
13571 | struct elf_reloc_cookie cookie; | |
13572 | ||
13573 | if (!init_reloc_cookie_for_section (&cookie, info, eh_frame)) | |
0a1b45a2 | 13574 | ret = false; |
9d0a14d3 RS |
13575 | else |
13576 | { | |
13577 | if (!_bfd_elf_gc_mark_fdes (info, sec, eh_frame, | |
13578 | gc_mark_hook, &cookie)) | |
0a1b45a2 | 13579 | ret = false; |
9d0a14d3 RS |
13580 | fini_reloc_cookie_for_section (&cookie, eh_frame); |
13581 | } | |
13582 | } | |
13583 | ||
2f0c68f2 CM |
13584 | eh_frame = elf_section_eh_frame_entry (sec); |
13585 | if (ret && eh_frame && !eh_frame->gc_mark) | |
13586 | if (!_bfd_elf_gc_mark (info, eh_frame, gc_mark_hook)) | |
0a1b45a2 | 13587 | ret = false; |
2f0c68f2 | 13588 | |
c152c796 AM |
13589 | return ret; |
13590 | } | |
13591 | ||
3c758495 TG |
13592 | /* Scan and mark sections in a special or debug section group. */ |
13593 | ||
13594 | static void | |
13595 | _bfd_elf_gc_mark_debug_special_section_group (asection *grp) | |
13596 | { | |
13597 | /* Point to first section of section group. */ | |
13598 | asection *ssec; | |
13599 | /* Used to iterate the section group. */ | |
13600 | asection *msec; | |
13601 | ||
0a1b45a2 AM |
13602 | bool is_special_grp = true; |
13603 | bool is_debug_grp = true; | |
3c758495 TG |
13604 | |
13605 | /* First scan to see if group contains any section other than debug | |
13606 | and special section. */ | |
13607 | ssec = msec = elf_next_in_group (grp); | |
13608 | do | |
13609 | { | |
13610 | if ((msec->flags & SEC_DEBUGGING) == 0) | |
0a1b45a2 | 13611 | is_debug_grp = false; |
3c758495 TG |
13612 | |
13613 | if ((msec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) != 0) | |
0a1b45a2 | 13614 | is_special_grp = false; |
3c758495 TG |
13615 | |
13616 | msec = elf_next_in_group (msec); | |
13617 | } | |
13618 | while (msec != ssec); | |
13619 | ||
13620 | /* If this is a pure debug section group or pure special section group, | |
13621 | keep all sections in this group. */ | |
13622 | if (is_debug_grp || is_special_grp) | |
13623 | { | |
13624 | do | |
13625 | { | |
13626 | msec->gc_mark = 1; | |
13627 | msec = elf_next_in_group (msec); | |
13628 | } | |
13629 | while (msec != ssec); | |
13630 | } | |
13631 | } | |
13632 | ||
7f6ab9f8 AM |
13633 | /* Keep debug and special sections. */ |
13634 | ||
0a1b45a2 | 13635 | bool |
7f6ab9f8 | 13636 | _bfd_elf_gc_mark_extra_sections (struct bfd_link_info *info, |
b7d07216 | 13637 | elf_gc_mark_hook_fn mark_hook) |
7f6ab9f8 AM |
13638 | { |
13639 | bfd *ibfd; | |
13640 | ||
c72f2fb2 | 13641 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
7f6ab9f8 AM |
13642 | { |
13643 | asection *isec; | |
0a1b45a2 AM |
13644 | bool some_kept; |
13645 | bool debug_frag_seen; | |
13646 | bool has_kept_debug_info; | |
7f6ab9f8 AM |
13647 | |
13648 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
13649 | continue; | |
57963c05 AM |
13650 | isec = ibfd->sections; |
13651 | if (isec == NULL || isec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
13652 | continue; | |
7f6ab9f8 | 13653 | |
b40bf0a2 NC |
13654 | /* Ensure all linker created sections are kept, |
13655 | see if any other section is already marked, | |
13656 | and note if we have any fragmented debug sections. */ | |
0a1b45a2 | 13657 | debug_frag_seen = some_kept = has_kept_debug_info = false; |
7f6ab9f8 AM |
13658 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
13659 | { | |
13660 | if ((isec->flags & SEC_LINKER_CREATED) != 0) | |
13661 | isec->gc_mark = 1; | |
eb026f09 AM |
13662 | else if (isec->gc_mark |
13663 | && (isec->flags & SEC_ALLOC) != 0 | |
13664 | && elf_section_type (isec) != SHT_NOTE) | |
0a1b45a2 | 13665 | some_kept = true; |
b7d07216 L |
13666 | else |
13667 | { | |
13668 | /* Since all sections, except for backend specific ones, | |
13669 | have been garbage collected, call mark_hook on this | |
13670 | section if any of its linked-to sections is marked. */ | |
def97fb9 AM |
13671 | asection *linked_to_sec; |
13672 | for (linked_to_sec = elf_linked_to_section (isec); | |
13673 | linked_to_sec != NULL && !linked_to_sec->linker_mark; | |
b7d07216 | 13674 | linked_to_sec = elf_linked_to_section (linked_to_sec)) |
def97fb9 AM |
13675 | { |
13676 | if (linked_to_sec->gc_mark) | |
13677 | { | |
13678 | if (!_bfd_elf_gc_mark (info, isec, mark_hook)) | |
0a1b45a2 | 13679 | return false; |
def97fb9 AM |
13680 | break; |
13681 | } | |
13682 | linked_to_sec->linker_mark = 1; | |
13683 | } | |
13684 | for (linked_to_sec = elf_linked_to_section (isec); | |
13685 | linked_to_sec != NULL && linked_to_sec->linker_mark; | |
13686 | linked_to_sec = elf_linked_to_section (linked_to_sec)) | |
13687 | linked_to_sec->linker_mark = 0; | |
b7d07216 | 13688 | } |
b40bf0a2 | 13689 | |
535b785f | 13690 | if (!debug_frag_seen |
b40bf0a2 | 13691 | && (isec->flags & SEC_DEBUGGING) |
08dedd66 | 13692 | && startswith (isec->name, ".debug_line.")) |
0a1b45a2 | 13693 | debug_frag_seen = true; |
5242a0a0 L |
13694 | else if (strcmp (bfd_section_name (isec), |
13695 | "__patchable_function_entries") == 0 | |
13696 | && elf_linked_to_section (isec) == NULL) | |
13697 | info->callbacks->einfo (_("%F%P: %pB(%pA): error: " | |
13698 | "need linked-to section " | |
13699 | "for --gc-sections\n"), | |
13700 | isec->owner, isec); | |
7f6ab9f8 AM |
13701 | } |
13702 | ||
eb026f09 AM |
13703 | /* If no non-note alloc section in this file will be kept, then |
13704 | we can toss out the debug and special sections. */ | |
7f6ab9f8 AM |
13705 | if (!some_kept) |
13706 | continue; | |
13707 | ||
13708 | /* Keep debug and special sections like .comment when they are | |
3c758495 | 13709 | not part of a group. Also keep section groups that contain |
b7d07216 L |
13710 | just debug sections or special sections. NB: Sections with |
13711 | linked-to section has been handled above. */ | |
7f6ab9f8 | 13712 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
3c758495 TG |
13713 | { |
13714 | if ((isec->flags & SEC_GROUP) != 0) | |
13715 | _bfd_elf_gc_mark_debug_special_section_group (isec); | |
13716 | else if (((isec->flags & SEC_DEBUGGING) != 0 | |
13717 | || (isec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0) | |
b7d07216 L |
13718 | && elf_next_in_group (isec) == NULL |
13719 | && elf_linked_to_section (isec) == NULL) | |
3c758495 | 13720 | isec->gc_mark = 1; |
b7c871ed | 13721 | if (isec->gc_mark && (isec->flags & SEC_DEBUGGING) != 0) |
0a1b45a2 | 13722 | has_kept_debug_info = true; |
3c758495 | 13723 | } |
b40bf0a2 | 13724 | |
b40bf0a2 NC |
13725 | /* Look for CODE sections which are going to be discarded, |
13726 | and find and discard any fragmented debug sections which | |
13727 | are associated with that code section. */ | |
b7c871ed L |
13728 | if (debug_frag_seen) |
13729 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) | |
13730 | if ((isec->flags & SEC_CODE) != 0 | |
13731 | && isec->gc_mark == 0) | |
13732 | { | |
13733 | unsigned int ilen; | |
13734 | asection *dsec; | |
b40bf0a2 | 13735 | |
b7c871ed | 13736 | ilen = strlen (isec->name); |
b40bf0a2 | 13737 | |
b7c871ed | 13738 | /* Association is determined by the name of the debug |
07d6d2b8 | 13739 | section containing the name of the code section as |
b7c871ed L |
13740 | a suffix. For example .debug_line.text.foo is a |
13741 | debug section associated with .text.foo. */ | |
13742 | for (dsec = ibfd->sections; dsec != NULL; dsec = dsec->next) | |
13743 | { | |
13744 | unsigned int dlen; | |
b40bf0a2 | 13745 | |
b7c871ed L |
13746 | if (dsec->gc_mark == 0 |
13747 | || (dsec->flags & SEC_DEBUGGING) == 0) | |
13748 | continue; | |
b40bf0a2 | 13749 | |
b7c871ed | 13750 | dlen = strlen (dsec->name); |
b40bf0a2 | 13751 | |
b7c871ed L |
13752 | if (dlen > ilen |
13753 | && strncmp (dsec->name + (dlen - ilen), | |
13754 | isec->name, ilen) == 0) | |
b40bf0a2 | 13755 | dsec->gc_mark = 0; |
b7c871ed | 13756 | } |
b40bf0a2 | 13757 | } |
b7c871ed L |
13758 | |
13759 | /* Mark debug sections referenced by kept debug sections. */ | |
13760 | if (has_kept_debug_info) | |
13761 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) | |
13762 | if (isec->gc_mark | |
13763 | && (isec->flags & SEC_DEBUGGING) != 0) | |
13764 | if (!_bfd_elf_gc_mark (info, isec, | |
13765 | elf_gc_mark_debug_section)) | |
0a1b45a2 | 13766 | return false; |
7f6ab9f8 | 13767 | } |
0a1b45a2 | 13768 | return true; |
7f6ab9f8 AM |
13769 | } |
13770 | ||
0a1b45a2 | 13771 | static bool |
ccabcbe5 | 13772 | elf_gc_sweep (bfd *abfd, struct bfd_link_info *info) |
c152c796 AM |
13773 | { |
13774 | bfd *sub; | |
ccabcbe5 | 13775 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
c152c796 | 13776 | |
c72f2fb2 | 13777 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
13778 | { |
13779 | asection *o; | |
13780 | ||
b19a8f85 | 13781 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
81742b83 | 13782 | || elf_object_id (sub) != elf_hash_table_id (elf_hash_table (info)) |
b19a8f85 | 13783 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) |
c152c796 | 13784 | continue; |
57963c05 AM |
13785 | o = sub->sections; |
13786 | if (o == NULL || o->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
13787 | continue; | |
c152c796 AM |
13788 | |
13789 | for (o = sub->sections; o != NULL; o = o->next) | |
13790 | { | |
a33dafc3 L |
13791 | /* When any section in a section group is kept, we keep all |
13792 | sections in the section group. If the first member of | |
13793 | the section group is excluded, we will also exclude the | |
13794 | group section. */ | |
13795 | if (o->flags & SEC_GROUP) | |
13796 | { | |
13797 | asection *first = elf_next_in_group (o); | |
13798 | o->gc_mark = first->gc_mark; | |
13799 | } | |
c152c796 | 13800 | |
1e7eae0d | 13801 | if (o->gc_mark) |
c152c796 AM |
13802 | continue; |
13803 | ||
13804 | /* Skip sweeping sections already excluded. */ | |
13805 | if (o->flags & SEC_EXCLUDE) | |
13806 | continue; | |
13807 | ||
13808 | /* Since this is early in the link process, it is simple | |
13809 | to remove a section from the output. */ | |
13810 | o->flags |= SEC_EXCLUDE; | |
13811 | ||
c55fe096 | 13812 | if (info->print_gc_sections && o->size != 0) |
695344c0 | 13813 | /* xgettext:c-format */ |
9793eb77 | 13814 | _bfd_error_handler (_("removing unused section '%pA' in file '%pB'"), |
c08bb8dd | 13815 | o, sub); |
c152c796 AM |
13816 | } |
13817 | } | |
13818 | ||
0a1b45a2 | 13819 | return true; |
c152c796 AM |
13820 | } |
13821 | ||
13822 | /* Propagate collected vtable information. This is called through | |
13823 | elf_link_hash_traverse. */ | |
13824 | ||
0a1b45a2 | 13825 | static bool |
c152c796 AM |
13826 | elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry *h, void *okp) |
13827 | { | |
c152c796 | 13828 | /* Those that are not vtables. */ |
cbd0eecf L |
13829 | if (h->start_stop |
13830 | || h->u2.vtable == NULL | |
13831 | || h->u2.vtable->parent == NULL) | |
0a1b45a2 | 13832 | return true; |
c152c796 AM |
13833 | |
13834 | /* Those vtables that do not have parents, we cannot merge. */ | |
cbd0eecf | 13835 | if (h->u2.vtable->parent == (struct elf_link_hash_entry *) -1) |
0a1b45a2 | 13836 | return true; |
c152c796 AM |
13837 | |
13838 | /* If we've already been done, exit. */ | |
cbd0eecf | 13839 | if (h->u2.vtable->used && h->u2.vtable->used[-1]) |
0a1b45a2 | 13840 | return true; |
c152c796 AM |
13841 | |
13842 | /* Make sure the parent's table is up to date. */ | |
cbd0eecf | 13843 | elf_gc_propagate_vtable_entries_used (h->u2.vtable->parent, okp); |
c152c796 | 13844 | |
cbd0eecf | 13845 | if (h->u2.vtable->used == NULL) |
c152c796 AM |
13846 | { |
13847 | /* None of this table's entries were referenced. Re-use the | |
13848 | parent's table. */ | |
cbd0eecf L |
13849 | h->u2.vtable->used = h->u2.vtable->parent->u2.vtable->used; |
13850 | h->u2.vtable->size = h->u2.vtable->parent->u2.vtable->size; | |
c152c796 AM |
13851 | } |
13852 | else | |
13853 | { | |
13854 | size_t n; | |
0a1b45a2 | 13855 | bool *cu, *pu; |
c152c796 AM |
13856 | |
13857 | /* Or the parent's entries into ours. */ | |
cbd0eecf | 13858 | cu = h->u2.vtable->used; |
0a1b45a2 | 13859 | cu[-1] = true; |
cbd0eecf | 13860 | pu = h->u2.vtable->parent->u2.vtable->used; |
c152c796 AM |
13861 | if (pu != NULL) |
13862 | { | |
13863 | const struct elf_backend_data *bed; | |
13864 | unsigned int log_file_align; | |
13865 | ||
13866 | bed = get_elf_backend_data (h->root.u.def.section->owner); | |
13867 | log_file_align = bed->s->log_file_align; | |
cbd0eecf | 13868 | n = h->u2.vtable->parent->u2.vtable->size >> log_file_align; |
c152c796 AM |
13869 | while (n--) |
13870 | { | |
13871 | if (*pu) | |
0a1b45a2 | 13872 | *cu = true; |
c152c796 AM |
13873 | pu++; |
13874 | cu++; | |
13875 | } | |
13876 | } | |
13877 | } | |
13878 | ||
0a1b45a2 | 13879 | return true; |
c152c796 AM |
13880 | } |
13881 | ||
0a1b45a2 | 13882 | static bool |
c152c796 AM |
13883 | elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp) |
13884 | { | |
13885 | asection *sec; | |
13886 | bfd_vma hstart, hend; | |
13887 | Elf_Internal_Rela *relstart, *relend, *rel; | |
13888 | const struct elf_backend_data *bed; | |
13889 | unsigned int log_file_align; | |
13890 | ||
c152c796 AM |
13891 | /* Take care of both those symbols that do not describe vtables as |
13892 | well as those that are not loaded. */ | |
cbd0eecf L |
13893 | if (h->start_stop |
13894 | || h->u2.vtable == NULL | |
13895 | || h->u2.vtable->parent == NULL) | |
0a1b45a2 | 13896 | return true; |
c152c796 AM |
13897 | |
13898 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
13899 | || h->root.type == bfd_link_hash_defweak); | |
13900 | ||
13901 | sec = h->root.u.def.section; | |
13902 | hstart = h->root.u.def.value; | |
13903 | hend = hstart + h->size; | |
13904 | ||
0a1b45a2 | 13905 | relstart = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, true); |
c152c796 | 13906 | if (!relstart) |
0a1b45a2 | 13907 | return *(bool *) okp = false; |
c152c796 AM |
13908 | bed = get_elf_backend_data (sec->owner); |
13909 | log_file_align = bed->s->log_file_align; | |
13910 | ||
056bafd4 | 13911 | relend = relstart + sec->reloc_count; |
c152c796 AM |
13912 | |
13913 | for (rel = relstart; rel < relend; ++rel) | |
13914 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
13915 | { | |
13916 | /* If the entry is in use, do nothing. */ | |
cbd0eecf L |
13917 | if (h->u2.vtable->used |
13918 | && (rel->r_offset - hstart) < h->u2.vtable->size) | |
c152c796 AM |
13919 | { |
13920 | bfd_vma entry = (rel->r_offset - hstart) >> log_file_align; | |
cbd0eecf | 13921 | if (h->u2.vtable->used[entry]) |
c152c796 AM |
13922 | continue; |
13923 | } | |
13924 | /* Otherwise, kill it. */ | |
13925 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
13926 | } | |
13927 | ||
0a1b45a2 | 13928 | return true; |
c152c796 AM |
13929 | } |
13930 | ||
87538722 AM |
13931 | /* Mark sections containing dynamically referenced symbols. When |
13932 | building shared libraries, we must assume that any visible symbol is | |
13933 | referenced. */ | |
715df9b8 | 13934 | |
0a1b45a2 | 13935 | bool |
64d03ab5 | 13936 | bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry *h, void *inf) |
715df9b8 | 13937 | { |
87538722 | 13938 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
d6f6f455 | 13939 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
87538722 | 13940 | |
715df9b8 EB |
13941 | if ((h->root.type == bfd_link_hash_defined |
13942 | || h->root.type == bfd_link_hash_defweak) | |
8ee10e86 AM |
13943 | && (!h->start_stop |
13944 | || h->root.ldscript_def | |
13945 | || !info->start_stop_gc) | |
d664fd41 | 13946 | && ((h->ref_dynamic && !h->forced_local) |
c4621b33 | 13947 | || ((h->def_regular || ELF_COMMON_DEF_P (h)) |
87538722 | 13948 | && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL |
fd91d419 | 13949 | && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN |
0e1862bb | 13950 | && (!bfd_link_executable (info) |
22185505 | 13951 | || info->gc_keep_exported |
b407645f AM |
13952 | || info->export_dynamic |
13953 | || (h->dynamic | |
13954 | && d != NULL | |
13955 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
422f1182 | 13956 | && (h->versioned >= versioned |
54e8959c L |
13957 | || !bfd_hide_sym_by_version (info->version_info, |
13958 | h->root.root.string))))) | |
715df9b8 EB |
13959 | h->root.u.def.section->flags |= SEC_KEEP; |
13960 | ||
0a1b45a2 | 13961 | return true; |
715df9b8 | 13962 | } |
3b36f7e6 | 13963 | |
74f0fb50 AM |
13964 | /* Keep all sections containing symbols undefined on the command-line, |
13965 | and the section containing the entry symbol. */ | |
13966 | ||
13967 | void | |
13968 | _bfd_elf_gc_keep (struct bfd_link_info *info) | |
13969 | { | |
13970 | struct bfd_sym_chain *sym; | |
13971 | ||
13972 | for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) | |
13973 | { | |
13974 | struct elf_link_hash_entry *h; | |
13975 | ||
13976 | h = elf_link_hash_lookup (elf_hash_table (info), sym->name, | |
0a1b45a2 | 13977 | false, false, false); |
74f0fb50 AM |
13978 | |
13979 | if (h != NULL | |
13980 | && (h->root.type == bfd_link_hash_defined | |
13981 | || h->root.type == bfd_link_hash_defweak) | |
2f5541f3 | 13982 | && !bfd_is_const_section (h->root.u.def.section)) |
74f0fb50 AM |
13983 | h->root.u.def.section->flags |= SEC_KEEP; |
13984 | } | |
13985 | } | |
13986 | ||
0a1b45a2 | 13987 | bool |
2f0c68f2 CM |
13988 | bfd_elf_parse_eh_frame_entries (bfd *abfd ATTRIBUTE_UNUSED, |
13989 | struct bfd_link_info *info) | |
13990 | { | |
13991 | bfd *ibfd = info->input_bfds; | |
13992 | ||
13993 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
13994 | { | |
13995 | asection *sec; | |
13996 | struct elf_reloc_cookie cookie; | |
13997 | ||
13998 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
13999 | continue; | |
57963c05 AM |
14000 | sec = ibfd->sections; |
14001 | if (sec == NULL || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
14002 | continue; | |
2f0c68f2 CM |
14003 | |
14004 | if (!init_reloc_cookie (&cookie, info, ibfd)) | |
0a1b45a2 | 14005 | return false; |
2f0c68f2 CM |
14006 | |
14007 | for (sec = ibfd->sections; sec; sec = sec->next) | |
14008 | { | |
08dedd66 | 14009 | if (startswith (bfd_section_name (sec), ".eh_frame_entry") |
2f0c68f2 CM |
14010 | && init_reloc_cookie_rels (&cookie, info, ibfd, sec)) |
14011 | { | |
14012 | _bfd_elf_parse_eh_frame_entry (info, sec, &cookie); | |
14013 | fini_reloc_cookie_rels (&cookie, sec); | |
14014 | } | |
14015 | } | |
14016 | } | |
0a1b45a2 | 14017 | return true; |
2f0c68f2 CM |
14018 | } |
14019 | ||
c152c796 AM |
14020 | /* Do mark and sweep of unused sections. */ |
14021 | ||
0a1b45a2 | 14022 | bool |
c152c796 AM |
14023 | bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info) |
14024 | { | |
0a1b45a2 | 14025 | bool ok = true; |
c152c796 | 14026 | bfd *sub; |
6a5bb875 | 14027 | elf_gc_mark_hook_fn gc_mark_hook; |
64d03ab5 | 14028 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
da44f4e5 | 14029 | struct elf_link_hash_table *htab; |
c152c796 | 14030 | |
64d03ab5 | 14031 | if (!bed->can_gc_sections |
715df9b8 | 14032 | || !is_elf_hash_table (info->hash)) |
c152c796 | 14033 | { |
9793eb77 | 14034 | _bfd_error_handler(_("warning: gc-sections option ignored")); |
0a1b45a2 | 14035 | return true; |
c152c796 AM |
14036 | } |
14037 | ||
74f0fb50 | 14038 | bed->gc_keep (info); |
da44f4e5 | 14039 | htab = elf_hash_table (info); |
74f0fb50 | 14040 | |
9d0a14d3 RS |
14041 | /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section |
14042 | at the .eh_frame section if we can mark the FDEs individually. */ | |
2f0c68f2 CM |
14043 | for (sub = info->input_bfds; |
14044 | info->eh_frame_hdr_type != COMPACT_EH_HDR && sub != NULL; | |
14045 | sub = sub->link.next) | |
9d0a14d3 RS |
14046 | { |
14047 | asection *sec; | |
14048 | struct elf_reloc_cookie cookie; | |
14049 | ||
57963c05 AM |
14050 | sec = sub->sections; |
14051 | if (sec == NULL || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
14052 | continue; | |
9d0a14d3 | 14053 | sec = bfd_get_section_by_name (sub, ".eh_frame"); |
9a2a56cc | 14054 | while (sec && init_reloc_cookie_for_section (&cookie, info, sec)) |
9d0a14d3 RS |
14055 | { |
14056 | _bfd_elf_parse_eh_frame (sub, info, sec, &cookie); | |
9a2a56cc AM |
14057 | if (elf_section_data (sec)->sec_info |
14058 | && (sec->flags & SEC_LINKER_CREATED) == 0) | |
9d0a14d3 RS |
14059 | elf_eh_frame_section (sub) = sec; |
14060 | fini_reloc_cookie_for_section (&cookie, sec); | |
199af150 | 14061 | sec = bfd_get_next_section_by_name (NULL, sec); |
9d0a14d3 RS |
14062 | } |
14063 | } | |
9d0a14d3 | 14064 | |
c152c796 | 14065 | /* Apply transitive closure to the vtable entry usage info. */ |
da44f4e5 | 14066 | elf_link_hash_traverse (htab, elf_gc_propagate_vtable_entries_used, &ok); |
c152c796 | 14067 | if (!ok) |
0a1b45a2 | 14068 | return false; |
c152c796 AM |
14069 | |
14070 | /* Kill the vtable relocations that were not used. */ | |
da44f4e5 | 14071 | elf_link_hash_traverse (htab, elf_gc_smash_unused_vtentry_relocs, &ok); |
c152c796 | 14072 | if (!ok) |
0a1b45a2 | 14073 | return false; |
c152c796 | 14074 | |
715df9b8 | 14075 | /* Mark dynamically referenced symbols. */ |
22185505 | 14076 | if (htab->dynamic_sections_created || info->gc_keep_exported) |
da44f4e5 | 14077 | elf_link_hash_traverse (htab, bed->gc_mark_dynamic_ref, info); |
c152c796 | 14078 | |
715df9b8 | 14079 | /* Grovel through relocs to find out who stays ... */ |
64d03ab5 | 14080 | gc_mark_hook = bed->gc_mark_hook; |
c72f2fb2 | 14081 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
14082 | { |
14083 | asection *o; | |
14084 | ||
b19a8f85 | 14085 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
81742b83 | 14086 | || elf_object_id (sub) != elf_hash_table_id (htab) |
b19a8f85 | 14087 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) |
c152c796 AM |
14088 | continue; |
14089 | ||
57963c05 AM |
14090 | o = sub->sections; |
14091 | if (o == NULL || o->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
14092 | continue; | |
14093 | ||
7f6ab9f8 AM |
14094 | /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep). |
14095 | Also treat note sections as a root, if the section is not part | |
8b6f4cd3 L |
14096 | of a group. We must keep all PREINIT_ARRAY, INIT_ARRAY as |
14097 | well as FINI_ARRAY sections for ld -r. */ | |
c152c796 | 14098 | for (o = sub->sections; o != NULL; o = o->next) |
7f6ab9f8 AM |
14099 | if (!o->gc_mark |
14100 | && (o->flags & SEC_EXCLUDE) == 0 | |
24007750 | 14101 | && ((o->flags & SEC_KEEP) != 0 |
8b6f4cd3 L |
14102 | || (bfd_link_relocatable (info) |
14103 | && ((elf_section_data (o)->this_hdr.sh_type | |
14104 | == SHT_PREINIT_ARRAY) | |
14105 | || (elf_section_data (o)->this_hdr.sh_type | |
14106 | == SHT_INIT_ARRAY) | |
14107 | || (elf_section_data (o)->this_hdr.sh_type | |
14108 | == SHT_FINI_ARRAY))) | |
7f6ab9f8 | 14109 | || (elf_section_data (o)->this_hdr.sh_type == SHT_NOTE |
7026832e | 14110 | && elf_next_in_group (o) == NULL |
99fabbc9 JL |
14111 | && elf_linked_to_section (o) == NULL) |
14112 | || ((elf_tdata (sub)->has_gnu_osabi & elf_gnu_osabi_retain) | |
14113 | && (elf_section_flags (o) & SHF_GNU_RETAIN)))) | |
7f6ab9f8 AM |
14114 | { |
14115 | if (!_bfd_elf_gc_mark (info, o, gc_mark_hook)) | |
0a1b45a2 | 14116 | return false; |
7f6ab9f8 | 14117 | } |
c152c796 AM |
14118 | } |
14119 | ||
6a5bb875 | 14120 | /* Allow the backend to mark additional target specific sections. */ |
7f6ab9f8 | 14121 | bed->gc_mark_extra_sections (info, gc_mark_hook); |
6a5bb875 | 14122 | |
c152c796 | 14123 | /* ... and mark SEC_EXCLUDE for those that go. */ |
ccabcbe5 | 14124 | return elf_gc_sweep (abfd, info); |
c152c796 AM |
14125 | } |
14126 | \f | |
14127 | /* Called from check_relocs to record the existence of a VTINHERIT reloc. */ | |
14128 | ||
0a1b45a2 | 14129 | bool |
c152c796 AM |
14130 | bfd_elf_gc_record_vtinherit (bfd *abfd, |
14131 | asection *sec, | |
14132 | struct elf_link_hash_entry *h, | |
14133 | bfd_vma offset) | |
14134 | { | |
14135 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
14136 | struct elf_link_hash_entry **search, *child; | |
ef53be89 | 14137 | size_t extsymcount; |
c152c796 AM |
14138 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
14139 | ||
14140 | /* The sh_info field of the symtab header tells us where the | |
14141 | external symbols start. We don't care about the local symbols at | |
14142 | this point. */ | |
14143 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size / bed->s->sizeof_sym; | |
14144 | if (!elf_bad_symtab (abfd)) | |
14145 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
14146 | ||
14147 | sym_hashes = elf_sym_hashes (abfd); | |
14148 | sym_hashes_end = sym_hashes + extsymcount; | |
14149 | ||
14150 | /* Hunt down the child symbol, which is in this section at the same | |
14151 | offset as the relocation. */ | |
14152 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
14153 | { | |
14154 | if ((child = *search) != NULL | |
14155 | && (child->root.type == bfd_link_hash_defined | |
14156 | || child->root.type == bfd_link_hash_defweak) | |
14157 | && child->root.u.def.section == sec | |
14158 | && child->root.u.def.value == offset) | |
14159 | goto win; | |
14160 | } | |
14161 | ||
695344c0 | 14162 | /* xgettext:c-format */ |
9793eb77 | 14163 | _bfd_error_handler (_("%pB: %pA+%#" PRIx64 ": no symbol found for INHERIT"), |
2dcf00ce | 14164 | abfd, sec, (uint64_t) offset); |
c152c796 | 14165 | bfd_set_error (bfd_error_invalid_operation); |
0a1b45a2 | 14166 | return false; |
c152c796 AM |
14167 | |
14168 | win: | |
cbd0eecf | 14169 | if (!child->u2.vtable) |
f6e332e6 | 14170 | { |
cbd0eecf L |
14171 | child->u2.vtable = ((struct elf_link_virtual_table_entry *) |
14172 | bfd_zalloc (abfd, sizeof (*child->u2.vtable))); | |
14173 | if (!child->u2.vtable) | |
0a1b45a2 | 14174 | return false; |
f6e332e6 | 14175 | } |
c152c796 AM |
14176 | if (!h) |
14177 | { | |
14178 | /* This *should* only be the absolute section. It could potentially | |
14179 | be that someone has defined a non-global vtable though, which | |
14180 | would be bad. It isn't worth paging in the local symbols to be | |
14181 | sure though; that case should simply be handled by the assembler. */ | |
14182 | ||
cbd0eecf | 14183 | child->u2.vtable->parent = (struct elf_link_hash_entry *) -1; |
c152c796 AM |
14184 | } |
14185 | else | |
cbd0eecf | 14186 | child->u2.vtable->parent = h; |
c152c796 | 14187 | |
0a1b45a2 | 14188 | return true; |
c152c796 AM |
14189 | } |
14190 | ||
14191 | /* Called from check_relocs to record the existence of a VTENTRY reloc. */ | |
14192 | ||
0a1b45a2 | 14193 | bool |
a0ea3a14 | 14194 | bfd_elf_gc_record_vtentry (bfd *abfd, asection *sec, |
c152c796 AM |
14195 | struct elf_link_hash_entry *h, |
14196 | bfd_vma addend) | |
14197 | { | |
14198 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14199 | unsigned int log_file_align = bed->s->log_file_align; | |
14200 | ||
a0ea3a14 L |
14201 | if (!h) |
14202 | { | |
14203 | /* xgettext:c-format */ | |
14204 | _bfd_error_handler (_("%pB: section '%pA': corrupt VTENTRY entry"), | |
14205 | abfd, sec); | |
14206 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 14207 | return false; |
a0ea3a14 L |
14208 | } |
14209 | ||
cbd0eecf | 14210 | if (!h->u2.vtable) |
f6e332e6 | 14211 | { |
cbd0eecf L |
14212 | h->u2.vtable = ((struct elf_link_virtual_table_entry *) |
14213 | bfd_zalloc (abfd, sizeof (*h->u2.vtable))); | |
14214 | if (!h->u2.vtable) | |
0a1b45a2 | 14215 | return false; |
f6e332e6 AM |
14216 | } |
14217 | ||
cbd0eecf | 14218 | if (addend >= h->u2.vtable->size) |
c152c796 AM |
14219 | { |
14220 | size_t size, bytes, file_align; | |
0a1b45a2 | 14221 | bool *ptr = h->u2.vtable->used; |
c152c796 AM |
14222 | |
14223 | /* While the symbol is undefined, we have to be prepared to handle | |
14224 | a zero size. */ | |
14225 | file_align = 1 << log_file_align; | |
14226 | if (h->root.type == bfd_link_hash_undefined) | |
14227 | size = addend + file_align; | |
14228 | else | |
14229 | { | |
14230 | size = h->size; | |
14231 | if (addend >= size) | |
14232 | { | |
14233 | /* Oops! We've got a reference past the defined end of | |
14234 | the table. This is probably a bug -- shall we warn? */ | |
14235 | size = addend + file_align; | |
14236 | } | |
14237 | } | |
14238 | size = (size + file_align - 1) & -file_align; | |
14239 | ||
14240 | /* Allocate one extra entry for use as a "done" flag for the | |
14241 | consolidation pass. */ | |
0a1b45a2 | 14242 | bytes = ((size >> log_file_align) + 1) * sizeof (bool); |
c152c796 AM |
14243 | |
14244 | if (ptr) | |
14245 | { | |
0a1b45a2 | 14246 | ptr = (bool *) bfd_realloc (ptr - 1, bytes); |
c152c796 AM |
14247 | |
14248 | if (ptr != NULL) | |
14249 | { | |
14250 | size_t oldbytes; | |
14251 | ||
cbd0eecf | 14252 | oldbytes = (((h->u2.vtable->size >> log_file_align) + 1) |
0a1b45a2 | 14253 | * sizeof (bool)); |
c152c796 AM |
14254 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); |
14255 | } | |
14256 | } | |
14257 | else | |
0a1b45a2 | 14258 | ptr = (bool *) bfd_zmalloc (bytes); |
c152c796 AM |
14259 | |
14260 | if (ptr == NULL) | |
0a1b45a2 | 14261 | return false; |
c152c796 AM |
14262 | |
14263 | /* And arrange for that done flag to be at index -1. */ | |
cbd0eecf L |
14264 | h->u2.vtable->used = ptr + 1; |
14265 | h->u2.vtable->size = size; | |
c152c796 AM |
14266 | } |
14267 | ||
0a1b45a2 | 14268 | h->u2.vtable->used[addend >> log_file_align] = true; |
c152c796 | 14269 | |
0a1b45a2 | 14270 | return true; |
c152c796 AM |
14271 | } |
14272 | ||
ae17ab41 CM |
14273 | /* Map an ELF section header flag to its corresponding string. */ |
14274 | typedef struct | |
14275 | { | |
14276 | char *flag_name; | |
14277 | flagword flag_value; | |
14278 | } elf_flags_to_name_table; | |
14279 | ||
3f75e1d6 | 14280 | static const elf_flags_to_name_table elf_flags_to_names [] = |
ae17ab41 CM |
14281 | { |
14282 | { "SHF_WRITE", SHF_WRITE }, | |
14283 | { "SHF_ALLOC", SHF_ALLOC }, | |
14284 | { "SHF_EXECINSTR", SHF_EXECINSTR }, | |
14285 | { "SHF_MERGE", SHF_MERGE }, | |
14286 | { "SHF_STRINGS", SHF_STRINGS }, | |
14287 | { "SHF_INFO_LINK", SHF_INFO_LINK}, | |
14288 | { "SHF_LINK_ORDER", SHF_LINK_ORDER}, | |
14289 | { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING}, | |
14290 | { "SHF_GROUP", SHF_GROUP }, | |
14291 | { "SHF_TLS", SHF_TLS }, | |
14292 | { "SHF_MASKOS", SHF_MASKOS }, | |
14293 | { "SHF_EXCLUDE", SHF_EXCLUDE }, | |
14294 | }; | |
14295 | ||
b9c361e0 | 14296 | /* Returns TRUE if the section is to be included, otherwise FALSE. */ |
0a1b45a2 | 14297 | bool |
ae17ab41 | 14298 | bfd_elf_lookup_section_flags (struct bfd_link_info *info, |
8b127cbc | 14299 | struct flag_info *flaginfo, |
b9c361e0 | 14300 | asection *section) |
ae17ab41 | 14301 | { |
8b127cbc | 14302 | const bfd_vma sh_flags = elf_section_flags (section); |
ae17ab41 | 14303 | |
8b127cbc | 14304 | if (!flaginfo->flags_initialized) |
ae17ab41 | 14305 | { |
8b127cbc AM |
14306 | bfd *obfd = info->output_bfd; |
14307 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
14308 | struct flag_info_list *tf = flaginfo->flag_list; | |
b9c361e0 JL |
14309 | int with_hex = 0; |
14310 | int without_hex = 0; | |
14311 | ||
8b127cbc | 14312 | for (tf = flaginfo->flag_list; tf != NULL; tf = tf->next) |
ae17ab41 | 14313 | { |
b9c361e0 | 14314 | unsigned i; |
8b127cbc | 14315 | flagword (*lookup) (char *); |
ae17ab41 | 14316 | |
8b127cbc AM |
14317 | lookup = bed->elf_backend_lookup_section_flags_hook; |
14318 | if (lookup != NULL) | |
ae17ab41 | 14319 | { |
8b127cbc | 14320 | flagword hexval = (*lookup) ((char *) tf->name); |
b9c361e0 JL |
14321 | |
14322 | if (hexval != 0) | |
14323 | { | |
14324 | if (tf->with == with_flags) | |
14325 | with_hex |= hexval; | |
14326 | else if (tf->with == without_flags) | |
14327 | without_hex |= hexval; | |
0a1b45a2 | 14328 | tf->valid = true; |
b9c361e0 JL |
14329 | continue; |
14330 | } | |
ae17ab41 | 14331 | } |
8b127cbc | 14332 | for (i = 0; i < ARRAY_SIZE (elf_flags_to_names); ++i) |
ae17ab41 | 14333 | { |
8b127cbc | 14334 | if (strcmp (tf->name, elf_flags_to_names[i].flag_name) == 0) |
b9c361e0 JL |
14335 | { |
14336 | if (tf->with == with_flags) | |
14337 | with_hex |= elf_flags_to_names[i].flag_value; | |
14338 | else if (tf->with == without_flags) | |
14339 | without_hex |= elf_flags_to_names[i].flag_value; | |
0a1b45a2 | 14340 | tf->valid = true; |
b9c361e0 JL |
14341 | break; |
14342 | } | |
14343 | } | |
8b127cbc | 14344 | if (!tf->valid) |
b9c361e0 | 14345 | { |
68ffbac6 | 14346 | info->callbacks->einfo |
9793eb77 | 14347 | (_("unrecognized INPUT_SECTION_FLAG %s\n"), tf->name); |
0a1b45a2 | 14348 | return false; |
ae17ab41 CM |
14349 | } |
14350 | } | |
0a1b45a2 | 14351 | flaginfo->flags_initialized = true; |
8b127cbc AM |
14352 | flaginfo->only_with_flags |= with_hex; |
14353 | flaginfo->not_with_flags |= without_hex; | |
ae17ab41 | 14354 | } |
ae17ab41 | 14355 | |
8b127cbc | 14356 | if ((flaginfo->only_with_flags & sh_flags) != flaginfo->only_with_flags) |
0a1b45a2 | 14357 | return false; |
b9c361e0 | 14358 | |
8b127cbc | 14359 | if ((flaginfo->not_with_flags & sh_flags) != 0) |
0a1b45a2 | 14360 | return false; |
b9c361e0 | 14361 | |
0a1b45a2 | 14362 | return true; |
ae17ab41 CM |
14363 | } |
14364 | ||
c152c796 AM |
14365 | struct alloc_got_off_arg { |
14366 | bfd_vma gotoff; | |
10455f89 | 14367 | struct bfd_link_info *info; |
c152c796 AM |
14368 | }; |
14369 | ||
14370 | /* We need a special top-level link routine to convert got reference counts | |
14371 | to real got offsets. */ | |
14372 | ||
0a1b45a2 | 14373 | static bool |
c152c796 AM |
14374 | elf_gc_allocate_got_offsets (struct elf_link_hash_entry *h, void *arg) |
14375 | { | |
a50b1753 | 14376 | struct alloc_got_off_arg *gofarg = (struct alloc_got_off_arg *) arg; |
10455f89 HPN |
14377 | bfd *obfd = gofarg->info->output_bfd; |
14378 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
c152c796 | 14379 | |
c152c796 AM |
14380 | if (h->got.refcount > 0) |
14381 | { | |
14382 | h->got.offset = gofarg->gotoff; | |
10455f89 | 14383 | gofarg->gotoff += bed->got_elt_size (obfd, gofarg->info, h, NULL, 0); |
c152c796 AM |
14384 | } |
14385 | else | |
14386 | h->got.offset = (bfd_vma) -1; | |
14387 | ||
0a1b45a2 | 14388 | return true; |
c152c796 AM |
14389 | } |
14390 | ||
14391 | /* And an accompanying bit to work out final got entry offsets once | |
14392 | we're done. Should be called from final_link. */ | |
14393 | ||
0a1b45a2 | 14394 | bool |
c152c796 AM |
14395 | bfd_elf_gc_common_finalize_got_offsets (bfd *abfd, |
14396 | struct bfd_link_info *info) | |
14397 | { | |
14398 | bfd *i; | |
14399 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14400 | bfd_vma gotoff; | |
c152c796 AM |
14401 | struct alloc_got_off_arg gofarg; |
14402 | ||
10455f89 HPN |
14403 | BFD_ASSERT (abfd == info->output_bfd); |
14404 | ||
c152c796 | 14405 | if (! is_elf_hash_table (info->hash)) |
0a1b45a2 | 14406 | return false; |
c152c796 AM |
14407 | |
14408 | /* The GOT offset is relative to the .got section, but the GOT header is | |
14409 | put into the .got.plt section, if the backend uses it. */ | |
14410 | if (bed->want_got_plt) | |
14411 | gotoff = 0; | |
14412 | else | |
14413 | gotoff = bed->got_header_size; | |
14414 | ||
14415 | /* Do the local .got entries first. */ | |
c72f2fb2 | 14416 | for (i = info->input_bfds; i; i = i->link.next) |
c152c796 AM |
14417 | { |
14418 | bfd_signed_vma *local_got; | |
ef53be89 | 14419 | size_t j, locsymcount; |
c152c796 AM |
14420 | Elf_Internal_Shdr *symtab_hdr; |
14421 | ||
14422 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) | |
14423 | continue; | |
14424 | ||
14425 | local_got = elf_local_got_refcounts (i); | |
14426 | if (!local_got) | |
14427 | continue; | |
14428 | ||
14429 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
14430 | if (elf_bad_symtab (i)) | |
14431 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
14432 | else | |
14433 | locsymcount = symtab_hdr->sh_info; | |
14434 | ||
14435 | for (j = 0; j < locsymcount; ++j) | |
14436 | { | |
14437 | if (local_got[j] > 0) | |
14438 | { | |
14439 | local_got[j] = gotoff; | |
10455f89 | 14440 | gotoff += bed->got_elt_size (abfd, info, NULL, i, j); |
c152c796 AM |
14441 | } |
14442 | else | |
14443 | local_got[j] = (bfd_vma) -1; | |
14444 | } | |
14445 | } | |
14446 | ||
14447 | /* Then the global .got entries. .plt refcounts are handled by | |
14448 | adjust_dynamic_symbol */ | |
14449 | gofarg.gotoff = gotoff; | |
10455f89 | 14450 | gofarg.info = info; |
c152c796 AM |
14451 | elf_link_hash_traverse (elf_hash_table (info), |
14452 | elf_gc_allocate_got_offsets, | |
14453 | &gofarg); | |
0a1b45a2 | 14454 | return true; |
c152c796 AM |
14455 | } |
14456 | ||
14457 | /* Many folk need no more in the way of final link than this, once | |
14458 | got entry reference counting is enabled. */ | |
14459 | ||
0a1b45a2 | 14460 | bool |
c152c796 AM |
14461 | bfd_elf_gc_common_final_link (bfd *abfd, struct bfd_link_info *info) |
14462 | { | |
14463 | if (!bfd_elf_gc_common_finalize_got_offsets (abfd, info)) | |
0a1b45a2 | 14464 | return false; |
c152c796 AM |
14465 | |
14466 | /* Invoke the regular ELF backend linker to do all the work. */ | |
14467 | return bfd_elf_final_link (abfd, info); | |
14468 | } | |
14469 | ||
0a1b45a2 | 14470 | bool |
c152c796 AM |
14471 | bfd_elf_reloc_symbol_deleted_p (bfd_vma offset, void *cookie) |
14472 | { | |
a50b1753 | 14473 | struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie; |
c152c796 AM |
14474 | |
14475 | if (rcookie->bad_symtab) | |
14476 | rcookie->rel = rcookie->rels; | |
14477 | ||
14478 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
14479 | { | |
14480 | unsigned long r_symndx; | |
14481 | ||
14482 | if (! rcookie->bad_symtab) | |
14483 | if (rcookie->rel->r_offset > offset) | |
0a1b45a2 | 14484 | return false; |
c152c796 AM |
14485 | if (rcookie->rel->r_offset != offset) |
14486 | continue; | |
14487 | ||
14488 | r_symndx = rcookie->rel->r_info >> rcookie->r_sym_shift; | |
2c2fa401 | 14489 | if (r_symndx == STN_UNDEF) |
0a1b45a2 | 14490 | return true; |
c152c796 AM |
14491 | |
14492 | if (r_symndx >= rcookie->locsymcount | |
14493 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
14494 | { | |
14495 | struct elf_link_hash_entry *h; | |
14496 | ||
14497 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
14498 | ||
14499 | while (h->root.type == bfd_link_hash_indirect | |
14500 | || h->root.type == bfd_link_hash_warning) | |
14501 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
14502 | ||
14503 | if ((h->root.type == bfd_link_hash_defined | |
14504 | || h->root.type == bfd_link_hash_defweak) | |
5b69e357 AM |
14505 | && (h->root.u.def.section->owner != rcookie->abfd |
14506 | || h->root.u.def.section->kept_section != NULL | |
14507 | || discarded_section (h->root.u.def.section))) | |
0a1b45a2 | 14508 | return true; |
c152c796 AM |
14509 | } |
14510 | else | |
14511 | { | |
14512 | /* It's not a relocation against a global symbol, | |
14513 | but it could be a relocation against a local | |
14514 | symbol for a discarded section. */ | |
14515 | asection *isec; | |
14516 | Elf_Internal_Sym *isym; | |
14517 | ||
14518 | /* Need to: get the symbol; get the section. */ | |
14519 | isym = &rcookie->locsyms[r_symndx]; | |
cb33740c | 14520 | isec = bfd_section_from_elf_index (rcookie->abfd, isym->st_shndx); |
5b69e357 AM |
14521 | if (isec != NULL |
14522 | && (isec->kept_section != NULL | |
14523 | || discarded_section (isec))) | |
0a1b45a2 | 14524 | return true; |
c152c796 | 14525 | } |
0a1b45a2 | 14526 | return false; |
c152c796 | 14527 | } |
0a1b45a2 | 14528 | return false; |
c152c796 AM |
14529 | } |
14530 | ||
14531 | /* Discard unneeded references to discarded sections. | |
75938853 AM |
14532 | Returns -1 on error, 1 if any section's size was changed, 0 if |
14533 | nothing changed. This function assumes that the relocations are in | |
14534 | sorted order, which is true for all known assemblers. */ | |
c152c796 | 14535 | |
75938853 | 14536 | int |
c152c796 AM |
14537 | bfd_elf_discard_info (bfd *output_bfd, struct bfd_link_info *info) |
14538 | { | |
14539 | struct elf_reloc_cookie cookie; | |
18cd5bce | 14540 | asection *o; |
c152c796 | 14541 | bfd *abfd; |
75938853 | 14542 | int changed = 0; |
c152c796 AM |
14543 | |
14544 | if (info->traditional_format | |
14545 | || !is_elf_hash_table (info->hash)) | |
75938853 | 14546 | return 0; |
c152c796 | 14547 | |
18cd5bce AM |
14548 | o = bfd_get_section_by_name (output_bfd, ".stab"); |
14549 | if (o != NULL) | |
c152c796 | 14550 | { |
18cd5bce | 14551 | asection *i; |
c152c796 | 14552 | |
18cd5bce | 14553 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
8da3dbc5 | 14554 | { |
18cd5bce AM |
14555 | if (i->size == 0 |
14556 | || i->reloc_count == 0 | |
14557 | || i->sec_info_type != SEC_INFO_TYPE_STABS) | |
14558 | continue; | |
c152c796 | 14559 | |
18cd5bce AM |
14560 | abfd = i->owner; |
14561 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
14562 | continue; | |
c152c796 | 14563 | |
18cd5bce | 14564 | if (!init_reloc_cookie_for_section (&cookie, info, i)) |
75938853 | 14565 | return -1; |
c152c796 | 14566 | |
18cd5bce AM |
14567 | if (_bfd_discard_section_stabs (abfd, i, |
14568 | elf_section_data (i)->sec_info, | |
5241d853 RS |
14569 | bfd_elf_reloc_symbol_deleted_p, |
14570 | &cookie)) | |
75938853 | 14571 | changed = 1; |
18cd5bce AM |
14572 | |
14573 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 14574 | } |
18cd5bce AM |
14575 | } |
14576 | ||
2f0c68f2 CM |
14577 | o = NULL; |
14578 | if (info->eh_frame_hdr_type != COMPACT_EH_HDR) | |
14579 | o = bfd_get_section_by_name (output_bfd, ".eh_frame"); | |
18cd5bce AM |
14580 | if (o != NULL) |
14581 | { | |
14582 | asection *i; | |
d7153c4a | 14583 | int eh_changed = 0; |
66631823 | 14584 | unsigned int eh_alignment; /* Octets. */ |
c152c796 | 14585 | |
18cd5bce | 14586 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
c152c796 | 14587 | { |
18cd5bce AM |
14588 | if (i->size == 0) |
14589 | continue; | |
14590 | ||
14591 | abfd = i->owner; | |
14592 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
14593 | continue; | |
14594 | ||
14595 | if (!init_reloc_cookie_for_section (&cookie, info, i)) | |
75938853 | 14596 | return -1; |
18cd5bce AM |
14597 | |
14598 | _bfd_elf_parse_eh_frame (abfd, info, i, &cookie); | |
14599 | if (_bfd_elf_discard_section_eh_frame (abfd, info, i, | |
c152c796 AM |
14600 | bfd_elf_reloc_symbol_deleted_p, |
14601 | &cookie)) | |
d7153c4a AM |
14602 | { |
14603 | eh_changed = 1; | |
14604 | if (i->size != i->rawsize) | |
14605 | changed = 1; | |
14606 | } | |
18cd5bce AM |
14607 | |
14608 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 14609 | } |
9866ffe2 | 14610 | |
66631823 CE |
14611 | eh_alignment = ((1 << o->alignment_power) |
14612 | * bfd_octets_per_byte (output_bfd, o)); | |
9866ffe2 AM |
14613 | /* Skip over zero terminator, and prevent empty sections from |
14614 | adding alignment padding at the end. */ | |
14615 | for (i = o->map_tail.s; i != NULL; i = i->map_tail.s) | |
14616 | if (i->size == 0) | |
14617 | i->flags |= SEC_EXCLUDE; | |
14618 | else if (i->size > 4) | |
14619 | break; | |
14620 | /* The last non-empty eh_frame section doesn't need padding. */ | |
14621 | if (i != NULL) | |
14622 | i = i->map_tail.s; | |
14623 | /* Any prior sections must pad the last FDE out to the output | |
14624 | section alignment. Otherwise we might have zero padding | |
14625 | between sections, which would be seen as a terminator. */ | |
14626 | for (; i != NULL; i = i->map_tail.s) | |
14627 | if (i->size == 4) | |
14628 | /* All but the last zero terminator should have been removed. */ | |
14629 | BFD_FAIL (); | |
14630 | else | |
14631 | { | |
14632 | bfd_size_type size | |
14633 | = (i->size + eh_alignment - 1) & -eh_alignment; | |
14634 | if (i->size != size) | |
af471f82 | 14635 | { |
9866ffe2 AM |
14636 | i->size = size; |
14637 | changed = 1; | |
14638 | eh_changed = 1; | |
af471f82 | 14639 | } |
9866ffe2 | 14640 | } |
d7153c4a AM |
14641 | if (eh_changed) |
14642 | elf_link_hash_traverse (elf_hash_table (info), | |
14643 | _bfd_elf_adjust_eh_frame_global_symbol, NULL); | |
18cd5bce | 14644 | } |
c152c796 | 14645 | |
18cd5bce AM |
14646 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next) |
14647 | { | |
14648 | const struct elf_backend_data *bed; | |
57963c05 | 14649 | asection *s; |
c152c796 | 14650 | |
18cd5bce AM |
14651 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
14652 | continue; | |
57963c05 AM |
14653 | s = abfd->sections; |
14654 | if (s == NULL || s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
14655 | continue; | |
18cd5bce AM |
14656 | |
14657 | bed = get_elf_backend_data (abfd); | |
14658 | ||
14659 | if (bed->elf_backend_discard_info != NULL) | |
14660 | { | |
14661 | if (!init_reloc_cookie (&cookie, info, abfd)) | |
75938853 | 14662 | return -1; |
18cd5bce AM |
14663 | |
14664 | if ((*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
75938853 | 14665 | changed = 1; |
18cd5bce AM |
14666 | |
14667 | fini_reloc_cookie (&cookie, abfd); | |
14668 | } | |
c152c796 AM |
14669 | } |
14670 | ||
2f0c68f2 CM |
14671 | if (info->eh_frame_hdr_type == COMPACT_EH_HDR) |
14672 | _bfd_elf_end_eh_frame_parsing (info); | |
14673 | ||
14674 | if (info->eh_frame_hdr_type | |
0e1862bb | 14675 | && !bfd_link_relocatable (info) |
c152c796 | 14676 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) |
75938853 | 14677 | changed = 1; |
c152c796 | 14678 | |
75938853 | 14679 | return changed; |
c152c796 | 14680 | } |
082b7297 | 14681 | |
0a1b45a2 | 14682 | bool |
0c511000 | 14683 | _bfd_elf_section_already_linked (bfd *abfd, |
c77ec726 | 14684 | asection *sec, |
c0f00686 | 14685 | struct bfd_link_info *info) |
082b7297 L |
14686 | { |
14687 | flagword flags; | |
c77ec726 | 14688 | const char *name, *key; |
082b7297 L |
14689 | struct bfd_section_already_linked *l; |
14690 | struct bfd_section_already_linked_hash_entry *already_linked_list; | |
0c511000 | 14691 | |
c77ec726 | 14692 | if (sec->output_section == bfd_abs_section_ptr) |
0a1b45a2 | 14693 | return false; |
0c511000 | 14694 | |
c77ec726 | 14695 | flags = sec->flags; |
0c511000 | 14696 | |
c77ec726 AM |
14697 | /* Return if it isn't a linkonce section. A comdat group section |
14698 | also has SEC_LINK_ONCE set. */ | |
14699 | if ((flags & SEC_LINK_ONCE) == 0) | |
0a1b45a2 | 14700 | return false; |
0c511000 | 14701 | |
c77ec726 AM |
14702 | /* Don't put group member sections on our list of already linked |
14703 | sections. They are handled as a group via their group section. */ | |
14704 | if (elf_sec_group (sec) != NULL) | |
0a1b45a2 | 14705 | return false; |
0c511000 | 14706 | |
c77ec726 AM |
14707 | /* For a SHT_GROUP section, use the group signature as the key. */ |
14708 | name = sec->name; | |
14709 | if ((flags & SEC_GROUP) != 0 | |
14710 | && elf_next_in_group (sec) != NULL | |
14711 | && elf_group_name (elf_next_in_group (sec)) != NULL) | |
14712 | key = elf_group_name (elf_next_in_group (sec)); | |
14713 | else | |
14714 | { | |
14715 | /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */ | |
08dedd66 | 14716 | if (startswith (name, ".gnu.linkonce.") |
c77ec726 AM |
14717 | && (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL) |
14718 | key++; | |
0c511000 | 14719 | else |
c77ec726 AM |
14720 | /* Must be a user linkonce section that doesn't follow gcc's |
14721 | naming convention. In this case we won't be matching | |
14722 | single member groups. */ | |
14723 | key = name; | |
0c511000 | 14724 | } |
6d2cd210 | 14725 | |
c77ec726 | 14726 | already_linked_list = bfd_section_already_linked_table_lookup (key); |
082b7297 L |
14727 | |
14728 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
14729 | { | |
c2370991 | 14730 | /* We may have 2 different types of sections on the list: group |
c77ec726 AM |
14731 | sections with a signature of <key> (<key> is some string), |
14732 | and linkonce sections named .gnu.linkonce.<type>.<key>. | |
14733 | Match like sections. LTO plugin sections are an exception. | |
14734 | They are always named .gnu.linkonce.t.<key> and match either | |
14735 | type of section. */ | |
14736 | if (((flags & SEC_GROUP) == (l->sec->flags & SEC_GROUP) | |
14737 | && ((flags & SEC_GROUP) != 0 | |
14738 | || strcmp (name, l->sec->name) == 0)) | |
e8a83e93 MB |
14739 | || (l->sec->owner->flags & BFD_PLUGIN) != 0 |
14740 | || (sec->owner->flags & BFD_PLUGIN) != 0) | |
082b7297 L |
14741 | { |
14742 | /* The section has already been linked. See if we should | |
6d2cd210 | 14743 | issue a warning. */ |
c77ec726 | 14744 | if (!_bfd_handle_already_linked (sec, l, info)) |
0a1b45a2 | 14745 | return false; |
082b7297 | 14746 | |
c77ec726 | 14747 | if (flags & SEC_GROUP) |
3d7f7666 | 14748 | { |
c77ec726 AM |
14749 | asection *first = elf_next_in_group (sec); |
14750 | asection *s = first; | |
3d7f7666 | 14751 | |
c77ec726 | 14752 | while (s != NULL) |
3d7f7666 | 14753 | { |
c77ec726 AM |
14754 | s->output_section = bfd_abs_section_ptr; |
14755 | /* Record which group discards it. */ | |
14756 | s->kept_section = l->sec; | |
14757 | s = elf_next_in_group (s); | |
14758 | /* These lists are circular. */ | |
14759 | if (s == first) | |
14760 | break; | |
3d7f7666 L |
14761 | } |
14762 | } | |
082b7297 | 14763 | |
0a1b45a2 | 14764 | return true; |
082b7297 L |
14765 | } |
14766 | } | |
14767 | ||
c77ec726 AM |
14768 | /* A single member comdat group section may be discarded by a |
14769 | linkonce section and vice versa. */ | |
14770 | if ((flags & SEC_GROUP) != 0) | |
3d7f7666 | 14771 | { |
c77ec726 | 14772 | asection *first = elf_next_in_group (sec); |
c2370991 | 14773 | |
c77ec726 AM |
14774 | if (first != NULL && elf_next_in_group (first) == first) |
14775 | /* Check this single member group against linkonce sections. */ | |
14776 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
14777 | if ((l->sec->flags & SEC_GROUP) == 0 | |
14778 | && bfd_elf_match_symbols_in_sections (l->sec, first, info)) | |
14779 | { | |
14780 | first->output_section = bfd_abs_section_ptr; | |
14781 | first->kept_section = l->sec; | |
14782 | sec->output_section = bfd_abs_section_ptr; | |
14783 | break; | |
14784 | } | |
14785 | } | |
14786 | else | |
14787 | /* Check this linkonce section against single member groups. */ | |
14788 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
14789 | if (l->sec->flags & SEC_GROUP) | |
6d2cd210 | 14790 | { |
c77ec726 | 14791 | asection *first = elf_next_in_group (l->sec); |
6d2cd210 | 14792 | |
c77ec726 AM |
14793 | if (first != NULL |
14794 | && elf_next_in_group (first) == first | |
14795 | && bfd_elf_match_symbols_in_sections (first, sec, info)) | |
14796 | { | |
14797 | sec->output_section = bfd_abs_section_ptr; | |
14798 | sec->kept_section = first; | |
14799 | break; | |
14800 | } | |
6d2cd210 | 14801 | } |
0c511000 | 14802 | |
c77ec726 AM |
14803 | /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F' |
14804 | referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4 | |
14805 | specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce' | |
14806 | prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its | |
14807 | matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded | |
14808 | but its `.gnu.linkonce.t.F' is discarded means we chose one-only | |
14809 | `.gnu.linkonce.t.F' section from a different bfd not requiring any | |
14810 | `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded. | |
14811 | The reverse order cannot happen as there is never a bfd with only the | |
14812 | `.gnu.linkonce.r.F' section. The order of sections in a bfd does not | |
14813 | matter as here were are looking only for cross-bfd sections. */ | |
14814 | ||
08dedd66 | 14815 | if ((flags & SEC_GROUP) == 0 && startswith (name, ".gnu.linkonce.r.")) |
c77ec726 AM |
14816 | for (l = already_linked_list->entry; l != NULL; l = l->next) |
14817 | if ((l->sec->flags & SEC_GROUP) == 0 | |
08dedd66 | 14818 | && startswith (l->sec->name, ".gnu.linkonce.t.")) |
c77ec726 AM |
14819 | { |
14820 | if (abfd != l->sec->owner) | |
14821 | sec->output_section = bfd_abs_section_ptr; | |
14822 | break; | |
14823 | } | |
80c29487 | 14824 | |
082b7297 | 14825 | /* This is the first section with this name. Record it. */ |
c77ec726 | 14826 | if (!bfd_section_already_linked_table_insert (already_linked_list, sec)) |
bb6198d2 | 14827 | info->callbacks->einfo (_("%F%P: already_linked_table: %E\n")); |
c77ec726 | 14828 | return sec->output_section == bfd_abs_section_ptr; |
082b7297 | 14829 | } |
81e1b023 | 14830 | |
0a1b45a2 | 14831 | bool |
a4d8e49b L |
14832 | _bfd_elf_common_definition (Elf_Internal_Sym *sym) |
14833 | { | |
14834 | return sym->st_shndx == SHN_COMMON; | |
14835 | } | |
14836 | ||
14837 | unsigned int | |
14838 | _bfd_elf_common_section_index (asection *sec ATTRIBUTE_UNUSED) | |
14839 | { | |
14840 | return SHN_COMMON; | |
14841 | } | |
14842 | ||
14843 | asection * | |
14844 | _bfd_elf_common_section (asection *sec ATTRIBUTE_UNUSED) | |
14845 | { | |
14846 | return bfd_com_section_ptr; | |
14847 | } | |
10455f89 HPN |
14848 | |
14849 | bfd_vma | |
14850 | _bfd_elf_default_got_elt_size (bfd *abfd, | |
14851 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
14852 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, | |
14853 | bfd *ibfd ATTRIBUTE_UNUSED, | |
14854 | unsigned long symndx ATTRIBUTE_UNUSED) | |
14855 | { | |
14856 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14857 | return bed->s->arch_size / 8; | |
14858 | } | |
83bac4b0 NC |
14859 | |
14860 | /* Routines to support the creation of dynamic relocs. */ | |
14861 | ||
83bac4b0 NC |
14862 | /* Returns the name of the dynamic reloc section associated with SEC. */ |
14863 | ||
14864 | static const char * | |
14865 | get_dynamic_reloc_section_name (bfd * abfd, | |
14866 | asection * sec, | |
0a1b45a2 | 14867 | bool is_rela) |
83bac4b0 | 14868 | { |
ddcf1fcf | 14869 | char *name; |
fd361982 | 14870 | const char *old_name = bfd_section_name (sec); |
ddcf1fcf | 14871 | const char *prefix = is_rela ? ".rela" : ".rel"; |
83bac4b0 | 14872 | |
ddcf1fcf | 14873 | if (old_name == NULL) |
83bac4b0 NC |
14874 | return NULL; |
14875 | ||
ddcf1fcf | 14876 | name = bfd_alloc (abfd, strlen (prefix) + strlen (old_name) + 1); |
68ffbac6 | 14877 | sprintf (name, "%s%s", prefix, old_name); |
83bac4b0 NC |
14878 | |
14879 | return name; | |
14880 | } | |
14881 | ||
14882 | /* Returns the dynamic reloc section associated with SEC. | |
14883 | If necessary compute the name of the dynamic reloc section based | |
14884 | on SEC's name (looked up in ABFD's string table) and the setting | |
14885 | of IS_RELA. */ | |
14886 | ||
14887 | asection * | |
0a1b45a2 AM |
14888 | _bfd_elf_get_dynamic_reloc_section (bfd *abfd, |
14889 | asection *sec, | |
14890 | bool is_rela) | |
83bac4b0 | 14891 | { |
0a1b45a2 | 14892 | asection *reloc_sec = elf_section_data (sec)->sreloc; |
83bac4b0 NC |
14893 | |
14894 | if (reloc_sec == NULL) | |
14895 | { | |
0a1b45a2 | 14896 | const char *name = get_dynamic_reloc_section_name (abfd, sec, is_rela); |
83bac4b0 NC |
14897 | |
14898 | if (name != NULL) | |
14899 | { | |
3d4d4302 | 14900 | reloc_sec = bfd_get_linker_section (abfd, name); |
83bac4b0 NC |
14901 | |
14902 | if (reloc_sec != NULL) | |
14903 | elf_section_data (sec)->sreloc = reloc_sec; | |
14904 | } | |
14905 | } | |
14906 | ||
14907 | return reloc_sec; | |
14908 | } | |
14909 | ||
14910 | /* Returns the dynamic reloc section associated with SEC. If the | |
14911 | section does not exist it is created and attached to the DYNOBJ | |
14912 | bfd and stored in the SRELOC field of SEC's elf_section_data | |
14913 | structure. | |
f8076f98 | 14914 | |
83bac4b0 NC |
14915 | ALIGNMENT is the alignment for the newly created section and |
14916 | IS_RELA defines whether the name should be .rela.<SEC's name> | |
14917 | or .rel.<SEC's name>. The section name is looked up in the | |
14918 | string table associated with ABFD. */ | |
14919 | ||
14920 | asection * | |
ca4be51c AM |
14921 | _bfd_elf_make_dynamic_reloc_section (asection *sec, |
14922 | bfd *dynobj, | |
14923 | unsigned int alignment, | |
14924 | bfd *abfd, | |
0a1b45a2 | 14925 | bool is_rela) |
83bac4b0 NC |
14926 | { |
14927 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
14928 | ||
14929 | if (reloc_sec == NULL) | |
14930 | { | |
14931 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
14932 | ||
14933 | if (name == NULL) | |
14934 | return NULL; | |
14935 | ||
3d4d4302 | 14936 | reloc_sec = bfd_get_linker_section (dynobj, name); |
83bac4b0 NC |
14937 | |
14938 | if (reloc_sec == NULL) | |
14939 | { | |
3d4d4302 AM |
14940 | flagword flags = (SEC_HAS_CONTENTS | SEC_READONLY |
14941 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
83bac4b0 NC |
14942 | if ((sec->flags & SEC_ALLOC) != 0) |
14943 | flags |= SEC_ALLOC | SEC_LOAD; | |
14944 | ||
3d4d4302 | 14945 | reloc_sec = bfd_make_section_anyway_with_flags (dynobj, name, flags); |
83bac4b0 NC |
14946 | if (reloc_sec != NULL) |
14947 | { | |
8877b5e5 AM |
14948 | /* _bfd_elf_get_sec_type_attr chooses a section type by |
14949 | name. Override as it may be wrong, eg. for a user | |
14950 | section named "auto" we'll get ".relauto" which is | |
14951 | seen to be a .rela section. */ | |
14952 | elf_section_type (reloc_sec) = is_rela ? SHT_RELA : SHT_REL; | |
fd361982 | 14953 | if (!bfd_set_section_alignment (reloc_sec, alignment)) |
83bac4b0 NC |
14954 | reloc_sec = NULL; |
14955 | } | |
14956 | } | |
14957 | ||
14958 | elf_section_data (sec)->sreloc = reloc_sec; | |
14959 | } | |
14960 | ||
14961 | return reloc_sec; | |
14962 | } | |
1338dd10 | 14963 | |
bffebb6b AM |
14964 | /* Copy the ELF symbol type and other attributes for a linker script |
14965 | assignment from HSRC to HDEST. Generally this should be treated as | |
14966 | if we found a strong non-dynamic definition for HDEST (except that | |
14967 | ld ignores multiple definition errors). */ | |
1338dd10 | 14968 | void |
bffebb6b AM |
14969 | _bfd_elf_copy_link_hash_symbol_type (bfd *abfd, |
14970 | struct bfd_link_hash_entry *hdest, | |
14971 | struct bfd_link_hash_entry *hsrc) | |
1338dd10 | 14972 | { |
bffebb6b AM |
14973 | struct elf_link_hash_entry *ehdest = (struct elf_link_hash_entry *) hdest; |
14974 | struct elf_link_hash_entry *ehsrc = (struct elf_link_hash_entry *) hsrc; | |
14975 | Elf_Internal_Sym isym; | |
1338dd10 PB |
14976 | |
14977 | ehdest->type = ehsrc->type; | |
35fc36a8 | 14978 | ehdest->target_internal = ehsrc->target_internal; |
bffebb6b AM |
14979 | |
14980 | isym.st_other = ehsrc->other; | |
0a1b45a2 | 14981 | elf_merge_st_other (abfd, ehdest, isym.st_other, NULL, true, false); |
1338dd10 | 14982 | } |
351f65ca L |
14983 | |
14984 | /* Append a RELA relocation REL to section S in BFD. */ | |
14985 | ||
14986 | void | |
14987 | elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
14988 | { | |
14989 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
14990 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); | |
14991 | BFD_ASSERT (loc + bed->s->sizeof_rela <= s->contents + s->size); | |
14992 | bed->s->swap_reloca_out (abfd, rel, loc); | |
14993 | } | |
14994 | ||
14995 | /* Append a REL relocation REL to section S in BFD. */ | |
14996 | ||
14997 | void | |
14998 | elf_append_rel (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
14999 | { | |
15000 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
15001 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rel); | |
15002 | BFD_ASSERT (loc + bed->s->sizeof_rel <= s->contents + s->size); | |
59d6ffb2 | 15003 | bed->s->swap_reloc_out (abfd, rel, loc); |
351f65ca | 15004 | } |
7dba9362 AM |
15005 | |
15006 | /* Define __start, __stop, .startof. or .sizeof. symbol. */ | |
15007 | ||
15008 | struct bfd_link_hash_entry * | |
15009 | bfd_elf_define_start_stop (struct bfd_link_info *info, | |
15010 | const char *symbol, asection *sec) | |
15011 | { | |
487b6440 | 15012 | struct elf_link_hash_entry *h; |
7dba9362 | 15013 | |
487b6440 | 15014 | h = elf_link_hash_lookup (elf_hash_table (info), symbol, |
0a1b45a2 | 15015 | false, false, true); |
e1b5d517 | 15016 | /* NB: Common symbols will be turned into definition later. */ |
487b6440 | 15017 | if (h != NULL |
8ee10e86 | 15018 | && !h->root.ldscript_def |
487b6440 AM |
15019 | && (h->root.type == bfd_link_hash_undefined |
15020 | || h->root.type == bfd_link_hash_undefweak | |
e1b5d517 L |
15021 | || ((h->ref_regular || h->def_dynamic) |
15022 | && !h->def_regular | |
15023 | && h->root.type != bfd_link_hash_common))) | |
7dba9362 | 15024 | { |
0a1b45a2 | 15025 | bool was_dynamic = h->ref_dynamic || h->def_dynamic; |
e1b5d517 | 15026 | h->verinfo.verdef = NULL; |
487b6440 AM |
15027 | h->root.type = bfd_link_hash_defined; |
15028 | h->root.u.def.section = sec; | |
15029 | h->root.u.def.value = 0; | |
15030 | h->def_regular = 1; | |
15031 | h->def_dynamic = 0; | |
15032 | h->start_stop = 1; | |
15033 | h->u2.start_stop_section = sec; | |
15034 | if (symbol[0] == '.') | |
15035 | { | |
15036 | /* .startof. and .sizeof. symbols are local. */ | |
559192d8 AM |
15037 | const struct elf_backend_data *bed; |
15038 | bed = get_elf_backend_data (info->output_bfd); | |
0a1b45a2 | 15039 | (*bed->elf_backend_hide_symbol) (info, h, true); |
487b6440 | 15040 | } |
36b8fda5 AM |
15041 | else |
15042 | { | |
15043 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
cae64165 RM |
15044 | h->other = ((h->other & ~ELF_ST_VISIBILITY (-1)) |
15045 | | info->start_stop_visibility); | |
bf3077a6 | 15046 | if (was_dynamic) |
36b8fda5 AM |
15047 | bfd_elf_link_record_dynamic_symbol (info, h); |
15048 | } | |
487b6440 | 15049 | return &h->root; |
7dba9362 | 15050 | } |
487b6440 | 15051 | return NULL; |
7dba9362 | 15052 | } |
5dbc8b37 L |
15053 | |
15054 | /* Find dynamic relocs for H that apply to read-only sections. */ | |
15055 | ||
15056 | asection * | |
15057 | _bfd_elf_readonly_dynrelocs (struct elf_link_hash_entry *h) | |
15058 | { | |
15059 | struct elf_dyn_relocs *p; | |
15060 | ||
15061 | for (p = h->dyn_relocs; p != NULL; p = p->next) | |
15062 | { | |
15063 | asection *s = p->sec->output_section; | |
15064 | ||
15065 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
15066 | return p->sec; | |
15067 | } | |
15068 | return NULL; | |
15069 | } | |
d49e5065 L |
15070 | |
15071 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to | |
15072 | read-only sections. */ | |
15073 | ||
0a1b45a2 | 15074 | bool |
d49e5065 L |
15075 | _bfd_elf_maybe_set_textrel (struct elf_link_hash_entry *h, void *inf) |
15076 | { | |
15077 | asection *sec; | |
15078 | ||
15079 | if (h->root.type == bfd_link_hash_indirect) | |
0a1b45a2 | 15080 | return true; |
d49e5065 L |
15081 | |
15082 | sec = _bfd_elf_readonly_dynrelocs (h); | |
15083 | if (sec != NULL) | |
15084 | { | |
15085 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
15086 | ||
15087 | info->flags |= DF_TEXTREL; | |
15088 | /* xgettext:c-format */ | |
15089 | info->callbacks->minfo (_("%pB: dynamic relocation against `%pT' " | |
15090 | "in read-only section `%pA'\n"), | |
15091 | sec->owner, h->root.root.string, sec); | |
15092 | ||
15093 | if (bfd_link_textrel_check (info)) | |
15094 | /* xgettext:c-format */ | |
15095 | info->callbacks->einfo (_("%P: %pB: warning: relocation against `%s' " | |
15096 | "in read-only section `%pA'\n"), | |
15097 | sec->owner, h->root.root.string, sec); | |
15098 | ||
15099 | /* Not an error, just cut short the traversal. */ | |
0a1b45a2 | 15100 | return false; |
d49e5065 | 15101 | } |
0a1b45a2 | 15102 | return true; |
d49e5065 | 15103 | } |
3084d7a2 L |
15104 | |
15105 | /* Add dynamic tags. */ | |
15106 | ||
0a1b45a2 | 15107 | bool |
3084d7a2 | 15108 | _bfd_elf_add_dynamic_tags (bfd *output_bfd, struct bfd_link_info *info, |
0a1b45a2 | 15109 | bool need_dynamic_reloc) |
3084d7a2 L |
15110 | { |
15111 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
15112 | ||
15113 | if (htab->dynamic_sections_created) | |
15114 | { | |
15115 | /* Add some entries to the .dynamic section. We fill in the | |
15116 | values later, in finish_dynamic_sections, but we must add | |
15117 | the entries now so that we get the correct size for the | |
15118 | .dynamic section. The DT_DEBUG entry is filled in by the | |
15119 | dynamic linker and used by the debugger. */ | |
15120 | #define add_dynamic_entry(TAG, VAL) \ | |
15121 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
15122 | ||
15123 | const struct elf_backend_data *bed | |
15124 | = get_elf_backend_data (output_bfd); | |
15125 | ||
15126 | if (bfd_link_executable (info)) | |
15127 | { | |
15128 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
0a1b45a2 | 15129 | return false; |
3084d7a2 L |
15130 | } |
15131 | ||
15132 | if (htab->dt_pltgot_required || htab->splt->size != 0) | |
15133 | { | |
15134 | /* DT_PLTGOT is used by prelink even if there is no PLT | |
15135 | relocation. */ | |
15136 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
0a1b45a2 | 15137 | return false; |
3084d7a2 L |
15138 | } |
15139 | ||
15140 | if (htab->dt_jmprel_required || htab->srelplt->size != 0) | |
15141 | { | |
15142 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
15143 | || !add_dynamic_entry (DT_PLTREL, | |
15144 | (bed->rela_plts_and_copies_p | |
15145 | ? DT_RELA : DT_REL)) | |
15146 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
0a1b45a2 | 15147 | return false; |
3084d7a2 L |
15148 | } |
15149 | ||
15150 | if (htab->tlsdesc_plt | |
15151 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
15152 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
0a1b45a2 | 15153 | return false; |
3084d7a2 L |
15154 | |
15155 | if (need_dynamic_reloc) | |
15156 | { | |
15157 | if (bed->rela_plts_and_copies_p) | |
15158 | { | |
15159 | if (!add_dynamic_entry (DT_RELA, 0) | |
15160 | || !add_dynamic_entry (DT_RELASZ, 0) | |
15161 | || !add_dynamic_entry (DT_RELAENT, | |
15162 | bed->s->sizeof_rela)) | |
0a1b45a2 | 15163 | return false; |
3084d7a2 L |
15164 | } |
15165 | else | |
15166 | { | |
15167 | if (!add_dynamic_entry (DT_REL, 0) | |
15168 | || !add_dynamic_entry (DT_RELSZ, 0) | |
15169 | || !add_dynamic_entry (DT_RELENT, | |
15170 | bed->s->sizeof_rel)) | |
0a1b45a2 | 15171 | return false; |
3084d7a2 L |
15172 | } |
15173 | ||
15174 | /* If any dynamic relocs apply to a read-only section, | |
15175 | then we need a DT_TEXTREL entry. */ | |
15176 | if ((info->flags & DF_TEXTREL) == 0) | |
15177 | elf_link_hash_traverse (htab, _bfd_elf_maybe_set_textrel, | |
15178 | info); | |
15179 | ||
15180 | if ((info->flags & DF_TEXTREL) != 0) | |
15181 | { | |
15182 | if (htab->ifunc_resolvers) | |
15183 | info->callbacks->einfo | |
15184 | (_("%P: warning: GNU indirect functions with DT_TEXTREL " | |
15185 | "may result in a segfault at runtime; recompile with %s\n"), | |
15186 | bfd_link_dll (info) ? "-fPIC" : "-fPIE"); | |
15187 | ||
15188 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
0a1b45a2 | 15189 | return false; |
3084d7a2 L |
15190 | } |
15191 | } | |
15192 | } | |
15193 | #undef add_dynamic_entry | |
15194 | ||
0a1b45a2 | 15195 | return true; |
3084d7a2 | 15196 | } |