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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
61baf725 | 2 | Copyright (C) 2008-2017 Free Software Foundation, Inc. |
a80b95ba TG |
3 | |
4 | Contributed by AdaCore. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
47d48711 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
a80b95ba TG |
20 | |
21 | #include "defs.h" | |
22 | #include "symtab.h" | |
23 | #include "gdbtypes.h" | |
24 | #include "bfd.h" | |
25 | #include "symfile.h" | |
26 | #include "objfiles.h" | |
27 | #include "buildsym.h" | |
28 | #include "gdbcmd.h" | |
29 | #include "gdbcore.h" | |
30 | #include "mach-o.h" | |
a80b95ba TG |
31 | #include "aout/stab_gnu.h" |
32 | #include "vec.h" | |
ccefe4c4 | 33 | #include "psympriv.h" |
e4c5f296 | 34 | #include "complaints.h" |
29f77997 | 35 | #include "gdb_bfd.h" |
af533a5f | 36 | #include <string> |
a80b95ba | 37 | |
a80b95ba | 38 | /* If non-zero displays debugging message. */ |
ccce17b0 | 39 | static unsigned int mach_o_debug_level = 0; |
a80b95ba | 40 | |
a80b95ba TG |
41 | /* Dwarf debugging information are never in the final executable. They stay |
42 | in object files and the executable contains the list of object files read | |
43 | during the link. | |
44 | Each time an oso (other source) is found in the executable, the reader | |
45 | creates such a structure. They are read after the processing of the | |
025bb325 MS |
46 | executable. */ |
47 | ||
a80b95ba TG |
48 | typedef struct oso_el |
49 | { | |
e4c5f296 | 50 | /* Object file name. Can also be a member name. */ |
a80b95ba TG |
51 | const char *name; |
52 | ||
53 | /* Associated time stamp. */ | |
54 | unsigned long mtime; | |
55 | ||
e4c5f296 TG |
56 | /* Stab symbols range for this OSO. */ |
57 | asymbol **oso_sym; | |
58 | asymbol **end_sym; | |
a80b95ba | 59 | |
e4c5f296 TG |
60 | /* Number of interesting stabs in the range. */ |
61 | unsigned int nbr_syms; | |
a80b95ba TG |
62 | } |
63 | oso_el; | |
64 | ||
8b89a20a | 65 | /* Vector of object files to be read after the executable. */ |
a80b95ba | 66 | DEF_VEC_O (oso_el); |
a80b95ba | 67 | |
2d33f7b8 TG |
68 | static void |
69 | macho_new_init (struct objfile *objfile) | |
70 | { | |
71 | } | |
72 | ||
73 | static void | |
74 | macho_symfile_init (struct objfile *objfile) | |
75 | { | |
76 | objfile->flags |= OBJF_REORDERED; | |
2d33f7b8 TG |
77 | } |
78 | ||
79 | /* Add a new OSO to the vector of OSO to load. */ | |
f192ea96 | 80 | |
a80b95ba | 81 | static void |
8b89a20a JB |
82 | macho_register_oso (VEC (oso_el) **oso_vector_ptr, |
83 | struct objfile *objfile, | |
e4c5f296 TG |
84 | asymbol **oso_sym, asymbol **end_sym, |
85 | unsigned int nbr_syms) | |
a80b95ba TG |
86 | { |
87 | oso_el el; | |
88 | ||
e4c5f296 TG |
89 | el.name = (*oso_sym)->name; |
90 | el.mtime = (*oso_sym)->value; | |
91 | el.oso_sym = oso_sym; | |
92 | el.end_sym = end_sym; | |
93 | el.nbr_syms = nbr_syms; | |
8b89a20a | 94 | VEC_safe_push (oso_el, *oso_vector_ptr, &el); |
a80b95ba TG |
95 | } |
96 | ||
e4c5f296 TG |
97 | /* Add symbol SYM to the minimal symbol table of OBJFILE. */ |
98 | ||
99 | static void | |
8dddcb8f TT |
100 | macho_symtab_add_minsym (minimal_symbol_reader &reader, |
101 | struct objfile *objfile, const asymbol *sym) | |
e4c5f296 TG |
102 | { |
103 | if (sym->name == NULL || *sym->name == '\0') | |
104 | { | |
105 | /* Skip names that don't exist (shouldn't happen), or names | |
106 | that are null strings (may happen). */ | |
107 | return; | |
108 | } | |
109 | ||
110 | if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) | |
111 | { | |
112 | CORE_ADDR symaddr; | |
e4c5f296 TG |
113 | enum minimal_symbol_type ms_type; |
114 | ||
e4c5f296 TG |
115 | /* Bfd symbols are section relative. */ |
116 | symaddr = sym->value + sym->section->vma; | |
117 | ||
45dfa85a | 118 | if (sym->section == bfd_abs_section_ptr) |
e4c5f296 TG |
119 | ms_type = mst_abs; |
120 | else if (sym->section->flags & SEC_CODE) | |
121 | { | |
122 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
123 | ms_type = mst_text; | |
124 | else | |
125 | ms_type = mst_file_text; | |
126 | } | |
127 | else if (sym->section->flags & SEC_ALLOC) | |
128 | { | |
129 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
130 | { | |
131 | if (sym->section->flags & SEC_LOAD) | |
132 | ms_type = mst_data; | |
133 | else | |
134 | ms_type = mst_bss; | |
135 | } | |
136 | else if (sym->flags & BSF_LOCAL) | |
137 | { | |
138 | /* Not a special stabs-in-elf symbol, do regular | |
139 | symbol processing. */ | |
140 | if (sym->section->flags & SEC_LOAD) | |
141 | ms_type = mst_file_data; | |
142 | else | |
143 | ms_type = mst_file_bss; | |
144 | } | |
145 | else | |
146 | ms_type = mst_unknown; | |
147 | } | |
148 | else | |
149 | return; /* Skip this symbol. */ | |
150 | ||
8dddcb8f TT |
151 | reader.record_with_info (sym->name, symaddr, ms_type, |
152 | gdb_bfd_section_index (objfile->obfd, | |
153 | sym->section)); | |
e4c5f296 TG |
154 | } |
155 | } | |
156 | ||
a80b95ba | 157 | /* Build the minimal symbol table from SYMBOL_TABLE of length |
e4c5f296 | 158 | NUMBER_OF_SYMBOLS for OBJFILE. Registers OSO filenames found. */ |
f192ea96 | 159 | |
a80b95ba | 160 | static void |
8dddcb8f TT |
161 | macho_symtab_read (minimal_symbol_reader &reader, |
162 | struct objfile *objfile, | |
8b89a20a JB |
163 | long number_of_symbols, asymbol **symbol_table, |
164 | VEC (oso_el) **oso_vector_ptr) | |
a80b95ba | 165 | { |
e4c5f296 | 166 | long i; |
e4c5f296 TG |
167 | const asymbol *file_so = NULL; |
168 | asymbol **oso_file = NULL; | |
b0d32fb6 | 169 | unsigned int nbr_syms = 0; |
a80b95ba | 170 | |
e4c5f296 TG |
171 | /* Current state while reading stabs. */ |
172 | enum | |
173 | { | |
174 | /* Not within an SO part. Only non-debugging symbols should be present, | |
175 | and will be added to the minimal symbols table. */ | |
176 | S_NO_SO, | |
bb00b29d | 177 | |
e4c5f296 TG |
178 | /* First SO read. Introduce an SO section, and may be followed by a second |
179 | SO. The SO section should contain onl debugging symbols. */ | |
180 | S_FIRST_SO, | |
a80b95ba | 181 | |
e4c5f296 TG |
182 | /* Second non-null SO found, just after the first one. Means that the first |
183 | is in fact a directory name. */ | |
184 | S_SECOND_SO, | |
a80b95ba | 185 | |
e4c5f296 TG |
186 | /* Non-null OSO found. Debugging info are DWARF in this OSO file. */ |
187 | S_DWARF_FILE, | |
3188d986 | 188 | |
e4c5f296 TG |
189 | S_STAB_FILE |
190 | } state = S_NO_SO; | |
a80b95ba | 191 | |
e4c5f296 TG |
192 | for (i = 0; i < number_of_symbols; i++) |
193 | { | |
194 | const asymbol *sym = symbol_table[i]; | |
195 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
a80b95ba | 196 | |
e4c5f296 TG |
197 | switch (state) |
198 | { | |
199 | case S_NO_SO: | |
200 | if (mach_o_sym->n_type == N_SO) | |
201 | { | |
202 | /* Start of object stab. */ | |
203 | if (sym->name == NULL || sym->name[0] == 0) | |
204 | { | |
205 | /* Unexpected empty N_SO. */ | |
206 | complaint (&symfile_complaints, | |
207 | _("Unexpected empty N_SO stab")); | |
208 | } | |
209 | else | |
210 | { | |
211 | file_so = sym; | |
e4c5f296 TG |
212 | state = S_FIRST_SO; |
213 | } | |
214 | } | |
215 | else if (sym->flags & BSF_DEBUGGING) | |
216 | { | |
13b8d0c6 TG |
217 | if (mach_o_sym->n_type == N_OPT) |
218 | { | |
219 | /* No complaint for OPT. */ | |
220 | break; | |
221 | } | |
222 | ||
e4c5f296 TG |
223 | /* Debugging symbols are not expected here. */ |
224 | complaint (&symfile_complaints, | |
13b8d0c6 | 225 | _("%s: Unexpected debug stab outside SO markers"), |
4262abfb | 226 | objfile_name (objfile)); |
e4c5f296 TG |
227 | } |
228 | else | |
229 | { | |
230 | /* Non-debugging symbols go to the minimal symbol table. */ | |
8dddcb8f | 231 | macho_symtab_add_minsym (reader, objfile, sym); |
e4c5f296 TG |
232 | } |
233 | break; | |
a80b95ba | 234 | |
e4c5f296 TG |
235 | case S_FIRST_SO: |
236 | case S_SECOND_SO: | |
237 | if (mach_o_sym->n_type == N_SO) | |
238 | { | |
239 | if (sym->name == NULL || sym->name[0] == 0) | |
240 | { | |
241 | /* Unexpected empty N_SO. */ | |
242 | complaint (&symfile_complaints, _("Empty SO section")); | |
243 | state = S_NO_SO; | |
244 | } | |
245 | else if (state == S_FIRST_SO) | |
246 | { | |
247 | /* Second SO stab for the file name. */ | |
e4c5f296 TG |
248 | file_so = sym; |
249 | state = S_SECOND_SO; | |
250 | } | |
251 | else | |
252 | complaint (&symfile_complaints, _("Three SO in a raw")); | |
253 | } | |
254 | else if (mach_o_sym->n_type == N_OSO) | |
255 | { | |
256 | if (sym->name == NULL || sym->name[0] == 0) | |
257 | { | |
258 | /* Empty OSO. Means that this file was compiled with | |
259 | stabs. */ | |
260 | state = S_STAB_FILE; | |
261 | warning (_("stabs debugging not supported for %s"), | |
262 | file_so->name); | |
263 | } | |
264 | else | |
265 | { | |
266 | /* Non-empty OSO for a Dwarf file. */ | |
267 | oso_file = symbol_table + i; | |
268 | nbr_syms = 0; | |
269 | state = S_DWARF_FILE; | |
270 | } | |
271 | } | |
272 | else | |
273 | complaint (&symfile_complaints, | |
274 | _("Unexpected stab after SO")); | |
275 | break; | |
a80b95ba | 276 | |
e4c5f296 TG |
277 | case S_STAB_FILE: |
278 | case S_DWARF_FILE: | |
279 | if (mach_o_sym->n_type == N_SO) | |
280 | { | |
281 | if (sym->name == NULL || sym->name[0] == 0) | |
282 | { | |
283 | /* End of file. */ | |
284 | if (state == S_DWARF_FILE) | |
8b89a20a JB |
285 | macho_register_oso (oso_vector_ptr, objfile, |
286 | oso_file, symbol_table + i, | |
e4c5f296 TG |
287 | nbr_syms); |
288 | state = S_NO_SO; | |
289 | } | |
290 | else | |
291 | { | |
292 | complaint (&symfile_complaints, _("Missing nul SO")); | |
293 | file_so = sym; | |
e4c5f296 TG |
294 | state = S_FIRST_SO; |
295 | } | |
296 | } | |
297 | else if (sym->flags & BSF_DEBUGGING) | |
298 | { | |
299 | if (state == S_STAB_FILE) | |
300 | { | |
301 | /* FIXME: to be implemented. */ | |
302 | } | |
303 | else | |
304 | { | |
305 | switch (mach_o_sym->n_type) | |
306 | { | |
307 | case N_FUN: | |
308 | if (sym->name == NULL || sym->name[0] == 0) | |
309 | break; | |
310 | /* Fall through. */ | |
311 | case N_STSYM: | |
312 | /* Interesting symbol. */ | |
313 | nbr_syms++; | |
314 | break; | |
315 | case N_ENSYM: | |
316 | case N_BNSYM: | |
317 | case N_GSYM: | |
318 | break; | |
319 | default: | |
320 | complaint (&symfile_complaints, | |
321 | _("unhandled stab for dwarf OSO file")); | |
322 | break; | |
323 | } | |
324 | } | |
325 | } | |
326 | else | |
327 | complaint (&symfile_complaints, | |
328 | _("non-debugging symbol within SO")); | |
329 | break; | |
330 | } | |
a80b95ba TG |
331 | } |
332 | ||
e4c5f296 TG |
333 | if (state != S_NO_SO) |
334 | complaint (&symfile_complaints, _("missing nul SO")); | |
a80b95ba TG |
335 | } |
336 | ||
337 | /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), | |
338 | returns the length of the archive name. | |
339 | Returns -1 otherwise. */ | |
f192ea96 | 340 | |
a80b95ba TG |
341 | static int |
342 | get_archive_prefix_len (const char *name) | |
343 | { | |
2e7bf1d7 | 344 | const char *lparen; |
a80b95ba TG |
345 | int name_len = strlen (name); |
346 | ||
347 | if (name_len == 0 || name[name_len - 1] != ')') | |
348 | return -1; | |
e4c5f296 | 349 | |
a80b95ba TG |
350 | lparen = strrchr (name, '('); |
351 | if (lparen == NULL || lparen == name) | |
352 | return -1; | |
353 | return lparen - name; | |
354 | } | |
355 | ||
e4c5f296 TG |
356 | /* Compare function to qsort OSOs, so that members of a library are |
357 | gathered. */ | |
358 | ||
f192ea96 TG |
359 | static int |
360 | oso_el_compare_name (const void *vl, const void *vr) | |
361 | { | |
362 | const oso_el *l = (const oso_el *)vl; | |
363 | const oso_el *r = (const oso_el *)vr; | |
364 | ||
365 | return strcmp (l->name, r->name); | |
366 | } | |
367 | ||
e4c5f296 TG |
368 | /* Hash table entry structure for the stabs symbols in the main object file. |
369 | This is used to speed up lookup for symbols in the OSO. */ | |
38947cca | 370 | |
e4c5f296 TG |
371 | struct macho_sym_hash_entry |
372 | { | |
373 | struct bfd_hash_entry base; | |
374 | const asymbol *sym; | |
375 | }; | |
38947cca | 376 | |
e4c5f296 | 377 | /* Routine to create an entry in the hash table. */ |
38947cca | 378 | |
e4c5f296 TG |
379 | static struct bfd_hash_entry * |
380 | macho_sym_hash_newfunc (struct bfd_hash_entry *entry, | |
381 | struct bfd_hash_table *table, | |
382 | const char *string) | |
38947cca | 383 | { |
e4c5f296 TG |
384 | struct macho_sym_hash_entry *ret = (struct macho_sym_hash_entry *) entry; |
385 | ||
386 | /* Allocate the structure if it has not already been allocated by a | |
387 | subclass. */ | |
388 | if (ret == NULL) | |
389 | ret = (struct macho_sym_hash_entry *) bfd_hash_allocate (table, | |
390 | sizeof (* ret)); | |
391 | if (ret == NULL) | |
392 | return NULL; | |
38947cca | 393 | |
e4c5f296 TG |
394 | /* Call the allocation method of the superclass. */ |
395 | ret = (struct macho_sym_hash_entry *) | |
396 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string); | |
38947cca | 397 | |
e4c5f296 | 398 | if (ret) |
38947cca | 399 | { |
e4c5f296 TG |
400 | /* Initialize the local fields. */ |
401 | ret->sym = NULL; | |
402 | } | |
38947cca | 403 | |
e4c5f296 TG |
404 | return (struct bfd_hash_entry *) ret; |
405 | } | |
38947cca | 406 | |
e4c5f296 TG |
407 | /* Get the value of SYM from the minimal symtab of MAIN_OBJFILE. This is used |
408 | to get the value of global and common symbols. */ | |
38947cca | 409 | |
e4c5f296 TG |
410 | static CORE_ADDR |
411 | macho_resolve_oso_sym_with_minsym (struct objfile *main_objfile, asymbol *sym) | |
412 | { | |
413 | /* For common symbol and global symbols, use the min symtab. */ | |
3b7344d5 | 414 | struct bound_minimal_symbol msym; |
e4c5f296 TG |
415 | const char *name = sym->name; |
416 | ||
417 | if (name[0] == bfd_get_symbol_leading_char (main_objfile->obfd)) | |
418 | ++name; | |
419 | msym = lookup_minimal_symbol (name, NULL, main_objfile); | |
3b7344d5 | 420 | if (msym.minsym == NULL) |
e4c5f296 TG |
421 | { |
422 | warning (_("can't find symbol '%s' in minsymtab"), name); | |
423 | return 0; | |
38947cca | 424 | } |
e4c5f296 | 425 | else |
77e371c0 | 426 | return BMSYMBOL_VALUE_ADDRESS (msym); |
38947cca JB |
427 | } |
428 | ||
e4c5f296 | 429 | /* Add oso file OSO/ABFD as a symbol file. */ |
f192ea96 TG |
430 | |
431 | static void | |
192b62ce TT |
432 | macho_add_oso_symfile (oso_el *oso, const gdb_bfd_ref_ptr &abfd, |
433 | const char *name, | |
b15cc25c PA |
434 | struct objfile *main_objfile, |
435 | symfile_add_flags symfile_flags) | |
f192ea96 | 436 | { |
e4c5f296 | 437 | int storage; |
f192ea96 | 438 | int i; |
e4c5f296 TG |
439 | asymbol **symbol_table; |
440 | asymbol **symp; | |
441 | struct bfd_hash_table table; | |
442 | int nbr_sections; | |
443 | ||
444 | /* Per section flag to mark which section have been rebased. */ | |
445 | unsigned char *sections_rebased; | |
f192ea96 TG |
446 | |
447 | if (mach_o_debug_level > 0) | |
e4c5f296 TG |
448 | printf_unfiltered |
449 | (_("Loading debugging symbols from oso: %s\n"), oso->name); | |
2d33f7b8 | 450 | |
192b62ce | 451 | if (!bfd_check_format (abfd.get (), bfd_object)) |
f192ea96 TG |
452 | { |
453 | warning (_("`%s': can't read symbols: %s."), oso->name, | |
454 | bfd_errmsg (bfd_get_error ())); | |
f192ea96 TG |
455 | return; |
456 | } | |
457 | ||
192b62ce | 458 | if (abfd->my_archive == NULL && oso->mtime != bfd_get_mtime (abfd.get ())) |
e4c5f296 TG |
459 | { |
460 | warning (_("`%s': file time stamp mismatch."), oso->name); | |
e4c5f296 TG |
461 | return; |
462 | } | |
463 | ||
464 | if (!bfd_hash_table_init_n (&table, macho_sym_hash_newfunc, | |
465 | sizeof (struct macho_sym_hash_entry), | |
466 | oso->nbr_syms)) | |
467 | { | |
468 | warning (_("`%s': can't create hash table"), oso->name); | |
e4c5f296 TG |
469 | return; |
470 | } | |
471 | ||
192b62ce | 472 | bfd_set_cacheable (abfd.get (), 1); |
f18b4cab | 473 | |
e4c5f296 | 474 | /* Read symbols table. */ |
192b62ce | 475 | storage = bfd_get_symtab_upper_bound (abfd.get ()); |
e4c5f296 | 476 | symbol_table = (asymbol **) xmalloc (storage); |
192b62ce | 477 | bfd_canonicalize_symtab (abfd.get (), symbol_table); |
f192ea96 | 478 | |
e4c5f296 | 479 | /* Init section flags. */ |
192b62ce | 480 | nbr_sections = bfd_count_sections (abfd.get ()); |
e4c5f296 TG |
481 | sections_rebased = (unsigned char *) alloca (nbr_sections); |
482 | for (i = 0; i < nbr_sections; i++) | |
483 | sections_rebased[i] = 0; | |
f192ea96 | 484 | |
e4c5f296 TG |
485 | /* Put symbols for the OSO file in the hash table. */ |
486 | for (symp = oso->oso_sym; symp != oso->end_sym; symp++) | |
f192ea96 | 487 | { |
e4c5f296 TG |
488 | const asymbol *sym = *symp; |
489 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
f18b4cab | 490 | |
e4c5f296 | 491 | switch (mach_o_sym->n_type) |
f18b4cab | 492 | { |
e4c5f296 TG |
493 | case N_ENSYM: |
494 | case N_BNSYM: | |
495 | case N_GSYM: | |
496 | sym = NULL; | |
497 | break; | |
498 | case N_FUN: | |
499 | if (sym->name == NULL || sym->name[0] == 0) | |
500 | sym = NULL; | |
501 | break; | |
502 | case N_STSYM: | |
503 | break; | |
504 | default: | |
505 | sym = NULL; | |
506 | break; | |
507 | } | |
508 | if (sym != NULL) | |
509 | { | |
510 | struct macho_sym_hash_entry *ent; | |
511 | ||
512 | ent = (struct macho_sym_hash_entry *) | |
513 | bfd_hash_lookup (&table, sym->name, TRUE, FALSE); | |
514 | if (ent->sym != NULL) | |
515 | complaint (&symfile_complaints, | |
516 | _("Duplicated symbol %s in symbol table"), sym->name); | |
517 | else | |
f18b4cab | 518 | { |
e4c5f296 TG |
519 | if (mach_o_debug_level > 4) |
520 | { | |
521 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
522 | printf_unfiltered | |
523 | (_("Adding symbol %s (addr: %s)\n"), | |
524 | sym->name, paddress (arch, sym->value)); | |
525 | } | |
526 | ent->sym = sym; | |
f18b4cab | 527 | } |
f18b4cab | 528 | } |
e4c5f296 | 529 | } |
f18b4cab | 530 | |
e4c5f296 TG |
531 | /* Relocate symbols of the OSO. */ |
532 | for (i = 0; symbol_table[i]; i++) | |
533 | { | |
534 | asymbol *sym = symbol_table[i]; | |
535 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
536 | ||
537 | if (mach_o_sym->n_type & BFD_MACH_O_N_STAB) | |
538 | continue; | |
539 | if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF | |
540 | && sym->value != 0) | |
f18b4cab | 541 | { |
e4c5f296 TG |
542 | /* For common symbol use the min symtab and modify the OSO |
543 | symbol table. */ | |
544 | CORE_ADDR res; | |
545 | ||
546 | res = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
547 | if (res != 0) | |
548 | { | |
45dfa85a | 549 | sym->section = bfd_com_section_ptr; |
e4c5f296 TG |
550 | sym->value = res; |
551 | } | |
f18b4cab | 552 | } |
e4c5f296 TG |
553 | else if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT) |
554 | { | |
555 | /* Normal symbol. */ | |
556 | asection *sec = sym->section; | |
557 | bfd_mach_o_section *msec; | |
558 | unsigned int sec_type; | |
559 | ||
560 | /* Skip buggy ones. */ | |
561 | if (sec == NULL || sections_rebased[sec->index] != 0) | |
562 | continue; | |
563 | ||
564 | /* Only consider regular, non-debugging sections. */ | |
565 | msec = bfd_mach_o_get_mach_o_section (sec); | |
566 | sec_type = msec->flags & BFD_MACH_O_SECTION_TYPE_MASK; | |
567 | if ((sec_type == BFD_MACH_O_S_REGULAR | |
568 | || sec_type == BFD_MACH_O_S_ZEROFILL) | |
569 | && (msec->flags & BFD_MACH_O_S_ATTR_DEBUG) == 0) | |
570 | { | |
571 | CORE_ADDR addr = 0; | |
572 | ||
573 | if ((mach_o_sym->n_type & BFD_MACH_O_N_EXT) != 0) | |
574 | { | |
575 | /* Use the min symtab for global symbols. */ | |
576 | addr = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
577 | } | |
578 | else | |
579 | { | |
580 | struct macho_sym_hash_entry *ent; | |
581 | ||
582 | ent = (struct macho_sym_hash_entry *) | |
583 | bfd_hash_lookup (&table, sym->name, FALSE, FALSE); | |
584 | if (ent != NULL) | |
585 | addr = bfd_asymbol_value (ent->sym); | |
586 | } | |
f18b4cab | 587 | |
e4c5f296 TG |
588 | /* Adjust the section. */ |
589 | if (addr != 0) | |
590 | { | |
591 | CORE_ADDR res = addr - sym->value; | |
592 | ||
593 | if (mach_o_debug_level > 3) | |
594 | { | |
595 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
596 | printf_unfiltered | |
597 | (_("resolve sect %s with %s (set to %s)\n"), | |
598 | sec->name, sym->name, | |
599 | paddress (arch, res)); | |
600 | } | |
192b62ce | 601 | bfd_set_section_vma (abfd.get (), sec, res); |
e4c5f296 TG |
602 | sections_rebased[sec->index] = 1; |
603 | } | |
604 | } | |
605 | else | |
606 | { | |
607 | /* Mark the section as never rebased. */ | |
608 | sections_rebased[sec->index] = 2; | |
609 | } | |
610 | } | |
f192ea96 TG |
611 | } |
612 | ||
e4c5f296 | 613 | bfd_hash_table_free (&table); |
38947cca | 614 | |
bdfed3bc TG |
615 | /* We need to clear SYMFILE_MAINLINE to avoid interractive question |
616 | from symfile.c:symbol_file_add_with_addrs_or_offsets. */ | |
e4c5f296 | 617 | symbol_file_add_from_bfd |
192b62ce TT |
618 | (abfd.get (), name, symfile_flags & ~(SYMFILE_MAINLINE | SYMFILE_VERBOSE), |
619 | NULL, | |
bdfed3bc | 620 | main_objfile->flags & (OBJF_REORDERED | OBJF_SHARED |
63524580 JK |
621 | | OBJF_READNOW | OBJF_USERLOADED), |
622 | main_objfile); | |
f192ea96 TG |
623 | } |
624 | ||
8b89a20a JB |
625 | /* Read symbols from the vector of oso files. |
626 | ||
627 | Note that this function sorts OSO_VECTOR_PTR. */ | |
f192ea96 | 628 | |
a80b95ba | 629 | static void |
8b89a20a JB |
630 | macho_symfile_read_all_oso (VEC (oso_el) **oso_vector_ptr, |
631 | struct objfile *main_objfile, | |
b15cc25c | 632 | symfile_add_flags symfile_flags) |
a80b95ba TG |
633 | { |
634 | int ix; | |
8b89a20a | 635 | VEC (oso_el) *vec = *oso_vector_ptr; |
a80b95ba | 636 | oso_el *oso; |
a80b95ba | 637 | |
f192ea96 TG |
638 | /* Sort oso by name so that files from libraries are gathered. */ |
639 | qsort (VEC_address (oso_el, vec), VEC_length (oso_el, vec), | |
640 | sizeof (oso_el), oso_el_compare_name); | |
a80b95ba | 641 | |
f192ea96 | 642 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso);) |
a80b95ba | 643 | { |
a80b95ba | 644 | int pfx_len; |
e4c5f296 | 645 | |
a80b95ba TG |
646 | /* Check if this is a library name. */ |
647 | pfx_len = get_archive_prefix_len (oso->name); | |
648 | if (pfx_len > 0) | |
649 | { | |
f192ea96 TG |
650 | int last_ix; |
651 | oso_el *oso2; | |
652 | int ix2; | |
a80b95ba | 653 | |
af533a5f | 654 | std::string archive_name (oso->name, pfx_len); |
a4453b7e | 655 | |
f192ea96 TG |
656 | /* Compute number of oso for this archive. */ |
657 | for (last_ix = ix; | |
658 | VEC_iterate (oso_el, vec, last_ix, oso2); last_ix++) | |
659 | { | |
af533a5f | 660 | if (strncmp (oso2->name, archive_name.c_str (), pfx_len) != 0) |
f192ea96 TG |
661 | break; |
662 | } | |
e4c5f296 | 663 | |
a80b95ba | 664 | /* Open the archive and check the format. */ |
192b62ce TT |
665 | gdb_bfd_ref_ptr archive_bfd (gdb_bfd_open (archive_name.c_str (), |
666 | gnutarget, -1)); | |
a80b95ba TG |
667 | if (archive_bfd == NULL) |
668 | { | |
669 | warning (_("Could not open OSO archive file \"%s\""), | |
af533a5f | 670 | archive_name.c_str ()); |
f192ea96 | 671 | ix = last_ix; |
a80b95ba TG |
672 | continue; |
673 | } | |
192b62ce | 674 | if (!bfd_check_format (archive_bfd.get (), bfd_archive)) |
a80b95ba TG |
675 | { |
676 | warning (_("OSO archive file \"%s\" not an archive."), | |
af533a5f | 677 | archive_name.c_str ()); |
f192ea96 | 678 | ix = last_ix; |
a80b95ba TG |
679 | continue; |
680 | } | |
a4453b7e | 681 | |
192b62ce TT |
682 | gdb_bfd_ref_ptr member_bfd |
683 | (gdb_bfd_openr_next_archived_file (archive_bfd.get (), NULL)); | |
e4c5f296 | 684 | |
a80b95ba TG |
685 | if (member_bfd == NULL) |
686 | { | |
687 | warning (_("Could not read archive members out of " | |
af533a5f | 688 | "OSO archive \"%s\""), archive_name.c_str ()); |
f192ea96 | 689 | ix = last_ix; |
a80b95ba TG |
690 | continue; |
691 | } | |
f192ea96 TG |
692 | |
693 | /* Load all oso in this library. */ | |
a80b95ba TG |
694 | while (member_bfd != NULL) |
695 | { | |
a80b95ba | 696 | const char *member_name = member_bfd->filename; |
f192ea96 TG |
697 | int member_len = strlen (member_name); |
698 | ||
ab7e10a0 | 699 | /* If this member is referenced, add it as a symfile. */ |
f192ea96 TG |
700 | for (ix2 = ix; ix2 < last_ix; ix2++) |
701 | { | |
702 | oso2 = VEC_index (oso_el, vec, ix2); | |
703 | ||
704 | if (oso2->name | |
705 | && strlen (oso2->name) == pfx_len + member_len + 2 | |
706 | && !memcmp (member_name, oso2->name + pfx_len + 1, | |
707 | member_len)) | |
708 | { | |
bdfed3bc | 709 | macho_add_oso_symfile (oso2, member_bfd, |
24ba069a | 710 | bfd_get_filename (member_bfd), |
bdfed3bc | 711 | main_objfile, symfile_flags); |
f192ea96 TG |
712 | oso2->name = NULL; |
713 | break; | |
714 | } | |
715 | } | |
716 | ||
192b62ce TT |
717 | member_bfd = gdb_bfd_openr_next_archived_file (archive_bfd.get (), |
718 | member_bfd.get ()); | |
a80b95ba | 719 | } |
f192ea96 TG |
720 | for (ix2 = ix; ix2 < last_ix; ix2++) |
721 | { | |
722 | oso_el *oso2 = VEC_index (oso_el, vec, ix2); | |
723 | ||
724 | if (oso2->name != NULL) | |
725 | warning (_("Could not find specified archive member " | |
726 | "for OSO name \"%s\""), oso->name); | |
727 | } | |
728 | ix = last_ix; | |
a80b95ba TG |
729 | } |
730 | else | |
731 | { | |
192b62ce TT |
732 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (oso->name, gnutarget, -1)); |
733 | if (abfd == NULL) | |
f192ea96 TG |
734 | warning (_("`%s': can't open to read symbols: %s."), oso->name, |
735 | bfd_errmsg (bfd_get_error ())); | |
736 | else | |
24ba069a JK |
737 | macho_add_oso_symfile (oso, abfd, oso->name, main_objfile, |
738 | symfile_flags); | |
f192ea96 TG |
739 | |
740 | ix++; | |
741 | } | |
742 | } | |
a80b95ba TG |
743 | } |
744 | ||
745 | /* DSYM (debug symbols) files contain the debug info of an executable. | |
746 | This is a separate file created by dsymutil(1) and is similar to debug | |
747 | link feature on ELF. | |
748 | DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the | |
749 | executable name and the executable base name to get the DSYM file name. */ | |
750 | #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" | |
751 | ||
24ba069a JK |
752 | /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it |
753 | and return *FILENAMEP with its original xmalloc-ated filename. | |
754 | Return NULL if no valid dsym file is found (FILENAMEP is not used in | |
755 | such case). */ | |
f192ea96 | 756 | |
192b62ce | 757 | static gdb_bfd_ref_ptr |
24ba069a | 758 | macho_check_dsym (struct objfile *objfile, char **filenamep) |
a80b95ba | 759 | { |
4262abfb | 760 | size_t name_len = strlen (objfile_name (objfile)); |
a80b95ba | 761 | size_t dsym_len = strlen (DSYM_SUFFIX); |
4262abfb | 762 | const char *base_name = lbasename (objfile_name (objfile)); |
a80b95ba | 763 | size_t base_len = strlen (base_name); |
224c3ddb | 764 | char *dsym_filename = (char *) alloca (name_len + dsym_len + base_len + 1); |
65ccb109 TG |
765 | bfd_mach_o_load_command *main_uuid; |
766 | bfd_mach_o_load_command *dsym_uuid; | |
a80b95ba | 767 | |
4262abfb | 768 | strcpy (dsym_filename, objfile_name (objfile)); |
a80b95ba TG |
769 | strcpy (dsym_filename + name_len, DSYM_SUFFIX); |
770 | strcpy (dsym_filename + name_len + dsym_len, base_name); | |
771 | ||
772 | if (access (dsym_filename, R_OK) != 0) | |
773 | return NULL; | |
774 | ||
65ccb109 TG |
775 | if (bfd_mach_o_lookup_command (objfile->obfd, |
776 | BFD_MACH_O_LC_UUID, &main_uuid) == 0) | |
a80b95ba | 777 | { |
4262abfb | 778 | warning (_("can't find UUID in %s"), objfile_name (objfile)); |
a80b95ba TG |
779 | return NULL; |
780 | } | |
192b62ce | 781 | gdb_bfd_ref_ptr dsym_bfd (gdb_bfd_openr (dsym_filename, gnutarget)); |
a80b95ba TG |
782 | if (dsym_bfd == NULL) |
783 | { | |
784 | warning (_("can't open dsym file %s"), dsym_filename); | |
a80b95ba TG |
785 | return NULL; |
786 | } | |
787 | ||
192b62ce | 788 | if (!bfd_check_format (dsym_bfd.get (), bfd_object)) |
a80b95ba | 789 | { |
a80b95ba | 790 | warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); |
a80b95ba TG |
791 | return NULL; |
792 | } | |
793 | ||
192b62ce | 794 | if (bfd_mach_o_lookup_command (dsym_bfd.get (), |
65ccb109 | 795 | BFD_MACH_O_LC_UUID, &dsym_uuid) == 0) |
a80b95ba TG |
796 | { |
797 | warning (_("can't find UUID in %s"), dsym_filename); | |
a80b95ba TG |
798 | return NULL; |
799 | } | |
65ccb109 TG |
800 | if (memcmp (dsym_uuid->command.uuid.uuid, main_uuid->command.uuid.uuid, |
801 | sizeof (main_uuid->command.uuid.uuid))) | |
a80b95ba | 802 | { |
4262abfb JK |
803 | warning (_("dsym file UUID doesn't match the one in %s"), |
804 | objfile_name (objfile)); | |
a80b95ba TG |
805 | return NULL; |
806 | } | |
24ba069a | 807 | *filenamep = xstrdup (dsym_filename); |
a80b95ba | 808 | return dsym_bfd; |
a80b95ba TG |
809 | } |
810 | ||
811 | static void | |
b15cc25c | 812 | macho_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags) |
a80b95ba TG |
813 | { |
814 | bfd *abfd = objfile->obfd; | |
a80b95ba | 815 | long storage_needed; |
8b89a20a JB |
816 | VEC (oso_el) *oso_vector = NULL; |
817 | struct cleanup *old_chain = make_cleanup (VEC_cleanup (oso_el), &oso_vector); | |
a80b95ba | 818 | |
a80b95ba TG |
819 | /* Get symbols from the symbol table only if the file is an executable. |
820 | The symbol table of object files is not relocated and is expected to | |
821 | be in the executable. */ | |
cf1061c0 | 822 | if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
a80b95ba | 823 | { |
24ba069a JK |
824 | char *dsym_filename; |
825 | ||
a80b95ba TG |
826 | /* Process the normal symbol table first. */ |
827 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); | |
828 | if (storage_needed < 0) | |
829 | error (_("Can't read symbols from %s: %s"), | |
830 | bfd_get_filename (objfile->obfd), | |
831 | bfd_errmsg (bfd_get_error ())); | |
832 | ||
833 | if (storage_needed > 0) | |
834 | { | |
835 | asymbol **symbol_table; | |
836 | long symcount; | |
837 | ||
838 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
f6aea118 | 839 | make_cleanup (xfree, symbol_table); |
e4c5f296 | 840 | |
d25e8719 | 841 | minimal_symbol_reader reader (objfile); |
e4c5f296 | 842 | |
a80b95ba | 843 | symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table); |
e4c5f296 | 844 | |
a80b95ba TG |
845 | if (symcount < 0) |
846 | error (_("Can't read symbols from %s: %s"), | |
847 | bfd_get_filename (objfile->obfd), | |
848 | bfd_errmsg (bfd_get_error ())); | |
e4c5f296 | 849 | |
8dddcb8f TT |
850 | macho_symtab_read (reader, objfile, symcount, symbol_table, |
851 | &oso_vector); | |
e4c5f296 | 852 | |
d25e8719 | 853 | reader.install (); |
a80b95ba | 854 | } |
a80b95ba | 855 | |
cf1061c0 TG |
856 | /* Try to read .eh_frame / .debug_frame. */ |
857 | /* First, locate these sections. We ignore the result status | |
858 | as it only checks for debug info. */ | |
251d32d9 | 859 | dwarf2_has_info (objfile, NULL); |
cf1061c0 | 860 | dwarf2_build_frame_info (objfile); |
e4c5f296 | 861 | |
a80b95ba | 862 | /* Check for DSYM file. */ |
192b62ce | 863 | gdb_bfd_ref_ptr dsym_bfd (macho_check_dsym (objfile, &dsym_filename)); |
a80b95ba TG |
864 | if (dsym_bfd != NULL) |
865 | { | |
6414f3fd | 866 | struct bfd_section *asect, *dsect; |
a80b95ba | 867 | |
24ba069a JK |
868 | make_cleanup (xfree, dsym_filename); |
869 | ||
a80b95ba TG |
870 | if (mach_o_debug_level > 0) |
871 | printf_unfiltered (_("dsym file found\n")); | |
872 | ||
6414f3fd TG |
873 | /* Set dsym section size. */ |
874 | for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections; | |
875 | asect && dsect; | |
876 | asect = asect->next, dsect = dsect->next) | |
877 | { | |
878 | if (strcmp (asect->name, dsect->name) != 0) | |
879 | break; | |
192b62ce | 880 | bfd_set_section_size (dsym_bfd.get (), dsect, |
6414f3fd TG |
881 | bfd_get_section_size (asect)); |
882 | } | |
883 | ||
2480cfa0 | 884 | /* Add the dsym file as a separate file. */ |
192b62ce TT |
885 | symbol_file_add_separate (dsym_bfd.get (), dsym_filename, |
886 | symfile_flags, objfile); | |
e4c5f296 | 887 | |
cf1061c0 | 888 | /* Don't try to read dwarf2 from main file or shared libraries. */ |
8b89a20a | 889 | do_cleanups (old_chain); |
2480cfa0 | 890 | return; |
a80b95ba TG |
891 | } |
892 | } | |
893 | ||
251d32d9 | 894 | if (dwarf2_has_info (objfile, NULL)) |
a80b95ba TG |
895 | { |
896 | /* DWARF 2 sections */ | |
f29dff0a | 897 | dwarf2_build_psymtabs (objfile); |
a80b95ba TG |
898 | } |
899 | ||
a80b95ba TG |
900 | /* Then the oso. */ |
901 | if (oso_vector != NULL) | |
8b89a20a JB |
902 | macho_symfile_read_all_oso (&oso_vector, objfile, symfile_flags); |
903 | ||
904 | do_cleanups (old_chain); | |
a80b95ba TG |
905 | } |
906 | ||
f18b4cab TG |
907 | static bfd_byte * |
908 | macho_symfile_relocate (struct objfile *objfile, asection *sectp, | |
909 | bfd_byte *buf) | |
910 | { | |
911 | bfd *abfd = objfile->obfd; | |
912 | ||
913 | /* We're only interested in sections with relocation | |
914 | information. */ | |
915 | if ((sectp->flags & SEC_RELOC) == 0) | |
916 | return NULL; | |
917 | ||
918 | if (mach_o_debug_level > 0) | |
919 | printf_unfiltered (_("Relocate section '%s' of %s\n"), | |
4262abfb | 920 | sectp->name, objfile_name (objfile)); |
f18b4cab | 921 | |
f18b4cab TG |
922 | return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); |
923 | } | |
924 | ||
a80b95ba TG |
925 | static void |
926 | macho_symfile_finish (struct objfile *objfile) | |
927 | { | |
928 | } | |
929 | ||
930 | static void | |
931 | macho_symfile_offsets (struct objfile *objfile, | |
66f65e2b | 932 | const struct section_addr_info *addrs) |
a80b95ba TG |
933 | { |
934 | unsigned int i; | |
a80b95ba TG |
935 | struct obj_section *osect; |
936 | ||
937 | /* Allocate section_offsets. */ | |
938 | objfile->num_sections = bfd_count_sections (objfile->obfd); | |
939 | objfile->section_offsets = (struct section_offsets *) | |
940 | obstack_alloc (&objfile->objfile_obstack, | |
941 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
942 | memset (objfile->section_offsets, 0, | |
943 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
944 | ||
945 | /* This code is run when we first add the objfile with | |
946 | symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are | |
947 | passed in. The place in symfile.c where the addrs are applied | |
948 | depends on the addrs having section names. But in the dyld code | |
949 | we build an anonymous array of addrs, so that code is a no-op. | |
950 | Because of that, we have to apply the addrs to the sections here. | |
951 | N.B. if an objfile slides after we've already created it, then it | |
952 | goes through objfile_relocate. */ | |
953 | ||
954 | for (i = 0; i < addrs->num_sections; i++) | |
955 | { | |
a80b95ba TG |
956 | ALL_OBJFILE_OSECTIONS (objfile, osect) |
957 | { | |
958 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
959 | ||
960 | if (strcmp (bfd_sect_name, addrs->other[i].name) == 0) | |
961 | { | |
962 | obj_section_offset (osect) = addrs->other[i].addr; | |
963 | break; | |
964 | } | |
965 | } | |
966 | } | |
967 | ||
968 | objfile->sect_index_text = 0; | |
969 | ||
970 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
971 | { | |
972 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
65cf3563 | 973 | int sect_index = osect - objfile->sections;; |
e4c5f296 | 974 | |
61012eef | 975 | if (startswith (bfd_sect_name, "LC_SEGMENT.")) |
cf1061c0 TG |
976 | bfd_sect_name += 11; |
977 | if (strcmp (bfd_sect_name, "__TEXT") == 0 | |
978 | || strcmp (bfd_sect_name, "__TEXT.__text") == 0) | |
a80b95ba TG |
979 | objfile->sect_index_text = sect_index; |
980 | } | |
981 | } | |
982 | ||
00b5771c | 983 | static const struct sym_fns macho_sym_fns = { |
3e43a32a MS |
984 | macho_new_init, /* init anything gbl to entire symtab */ |
985 | macho_symfile_init, /* read initial info, setup for sym_read() */ | |
986 | macho_symfile_read, /* read a symbol file into symtab */ | |
b11896a5 | 987 | NULL, /* sym_read_psymbols */ |
3e43a32a MS |
988 | macho_symfile_finish, /* finished with file, cleanup */ |
989 | macho_symfile_offsets, /* xlate external to internal form */ | |
990 | default_symfile_segments, /* Get segment information from a file. */ | |
991 | NULL, | |
992 | macho_symfile_relocate, /* Relocate a debug section. */ | |
55aa24fb | 993 | NULL, /* sym_get_probes */ |
00b5771c | 994 | &psym_functions |
a80b95ba TG |
995 | }; |
996 | ||
997 | void | |
dd9aa048 | 998 | _initialize_machoread (void) |
a80b95ba | 999 | { |
c256e171 | 1000 | add_symtab_fns (bfd_target_mach_o_flavour, &macho_sym_fns); |
a80b95ba | 1001 | |
ccce17b0 YQ |
1002 | add_setshow_zuinteger_cmd ("mach-o", class_obscure, |
1003 | &mach_o_debug_level, | |
1004 | _("Set if printing Mach-O symbols processing."), | |
1005 | _("Show if printing Mach-O symbols processing."), | |
1006 | NULL, NULL, NULL, | |
1007 | &setdebuglist, &showdebuglist); | |
a80b95ba | 1008 | } |