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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
4c38e0a4 | 2 | Copyright (C) 2008, 2009, 2010 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 | |
19 | along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "symtab.h" | |
24 | #include "gdbtypes.h" | |
25 | #include "bfd.h" | |
26 | #include "symfile.h" | |
27 | #include "objfiles.h" | |
28 | #include "buildsym.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "gdbcore.h" | |
31 | #include "mach-o.h" | |
32 | #include "gdb_assert.h" | |
33 | #include "aout/stab_gnu.h" | |
34 | #include "vec.h" | |
35 | ||
36 | #include <string.h> | |
37 | ||
38 | /* If non-zero displays debugging message. */ | |
39 | static int mach_o_debug_level = 0; | |
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 | |
46 | executable. | |
47 | */ | |
48 | typedef struct oso_el | |
49 | { | |
50 | /* Object file name. */ | |
51 | const char *name; | |
52 | ||
53 | /* Associated time stamp. */ | |
54 | unsigned long mtime; | |
55 | ||
56 | /* Number of sections. This is the length of SYMBOLS and OFFSETS array. */ | |
57 | int num_sections; | |
58 | ||
59 | /* Each seaction of the object file is represented by a symbol and its | |
3188d986 TG |
60 | offset. If the offset is 0, we assume that the symbol is at offset 0 |
61 | in the OSO object file and a symbol lookup in the main file is | |
62 | required to get the offset. */ | |
a80b95ba TG |
63 | asymbol **symbols; |
64 | bfd_vma *offsets; | |
65 | } | |
66 | oso_el; | |
67 | ||
2d33f7b8 TG |
68 | /* Vector of object files to be read after the executable. This is one |
69 | global variable but it's life-time is the one of macho_symfile_read. */ | |
a80b95ba TG |
70 | DEF_VEC_O (oso_el); |
71 | static VEC (oso_el) *oso_vector; | |
72 | ||
f18b4cab TG |
73 | struct macho_oso_data |
74 | { | |
75 | /* Per objfile symbol table. This is used to apply relocation to sections | |
76 | It is loaded only once, then relocated, and free after sections are | |
77 | relocated. */ | |
78 | asymbol **symbol_table; | |
79 | ||
80 | /* The offsets for this objfile. Used to relocate the symbol_table. */ | |
81 | struct oso_el *oso; | |
82 | ||
83 | struct objfile *main_objfile; | |
84 | }; | |
85 | ||
86 | /* Data for OSO being processed. */ | |
87 | ||
88 | static struct macho_oso_data current_oso; | |
89 | ||
2d33f7b8 TG |
90 | static void |
91 | macho_new_init (struct objfile *objfile) | |
92 | { | |
93 | } | |
94 | ||
95 | static void | |
96 | macho_symfile_init (struct objfile *objfile) | |
97 | { | |
98 | objfile->flags |= OBJF_REORDERED; | |
99 | init_entry_point_info (objfile); | |
100 | } | |
101 | ||
102 | /* Add a new OSO to the vector of OSO to load. */ | |
f192ea96 | 103 | |
a80b95ba | 104 | static void |
2d33f7b8 TG |
105 | macho_register_oso (const asymbol *oso_sym, int nbr_sections, |
106 | asymbol **symbols, bfd_vma *offsets) | |
a80b95ba TG |
107 | { |
108 | oso_el el; | |
109 | ||
110 | el.name = oso_sym->name; | |
111 | el.mtime = oso_sym->value; | |
112 | el.num_sections = nbr_sections; | |
113 | el.symbols = symbols; | |
114 | el.offsets = offsets; | |
115 | VEC_safe_push (oso_el, oso_vector, &el); | |
116 | } | |
117 | ||
118 | /* Build the minimal symbol table from SYMBOL_TABLE of length | |
119 | NUMBER_OF_SYMBOLS for OBJFILE. | |
120 | Read OSO files at the end. */ | |
f192ea96 | 121 | |
a80b95ba TG |
122 | static void |
123 | macho_symtab_read (struct objfile *objfile, | |
124 | long number_of_symbols, asymbol **symbol_table) | |
125 | { | |
126 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
127 | long storage_needed; | |
a80b95ba TG |
128 | long i, j; |
129 | CORE_ADDR offset; | |
130 | enum minimal_symbol_type ms_type; | |
131 | unsigned int nbr_sections = bfd_count_sections (objfile->obfd); | |
132 | asymbol **first_symbol = NULL; | |
133 | bfd_vma *first_offset = NULL; | |
134 | const asymbol *oso_file = NULL; | |
135 | ||
136 | for (i = 0; i < number_of_symbols; i++) | |
137 | { | |
bb00b29d TG |
138 | asymbol *sym = symbol_table[i]; |
139 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
140 | ||
a80b95ba TG |
141 | offset = ANOFFSET (objfile->section_offsets, sym->section->index); |
142 | ||
143 | if (sym->flags & BSF_DEBUGGING) | |
144 | { | |
a80b95ba TG |
145 | bfd_vma addr; |
146 | ||
3188d986 TG |
147 | /* Debugging symbols are used to collect OSO file names as well |
148 | as section offsets. */ | |
149 | ||
bb00b29d | 150 | switch (mach_o_sym->n_type) |
a80b95ba TG |
151 | { |
152 | case N_SO: | |
3188d986 TG |
153 | /* An empty SO entry terminates a chunk for an OSO file. */ |
154 | if ((sym->name == NULL || sym->name[0] == 0) && oso_file != NULL) | |
a80b95ba | 155 | { |
2d33f7b8 TG |
156 | macho_register_oso (oso_file, nbr_sections, |
157 | first_symbol, first_offset); | |
a80b95ba TG |
158 | first_symbol = NULL; |
159 | first_offset = NULL; | |
160 | oso_file = NULL; | |
161 | } | |
162 | break; | |
163 | case N_FUN: | |
164 | case N_STSYM: | |
165 | if (sym->name == NULL || sym->name[0] == '\0') | |
166 | break; | |
167 | /* Fall through. */ | |
168 | case N_BNSYM: | |
169 | gdb_assert (oso_file != NULL); | |
170 | addr = sym->value | |
171 | + bfd_get_section_vma (sym->section->bfd, sym->section); | |
172 | if (addr != 0 | |
173 | && first_symbol[sym->section->index] == NULL) | |
174 | { | |
3188d986 | 175 | /* These STAB entries can directly relocate a section. */ |
a80b95ba TG |
176 | first_symbol[sym->section->index] = sym; |
177 | first_offset[sym->section->index] = addr + offset; | |
178 | } | |
179 | break; | |
180 | case N_GSYM: | |
181 | gdb_assert (oso_file != NULL); | |
182 | if (first_symbol[sym->section->index] == NULL) | |
3188d986 TG |
183 | { |
184 | /* This STAB entry needs a symbol look-up to relocate | |
185 | the section. */ | |
186 | first_symbol[sym->section->index] = sym; | |
187 | first_offset[sym->section->index] = 0; | |
188 | } | |
a80b95ba TG |
189 | break; |
190 | case N_OSO: | |
3188d986 | 191 | /* New OSO file. */ |
a80b95ba TG |
192 | gdb_assert (oso_file == NULL); |
193 | first_symbol = (asymbol **)xmalloc (nbr_sections | |
194 | * sizeof (asymbol *)); | |
195 | first_offset = (bfd_vma *)xmalloc (nbr_sections | |
196 | * sizeof (bfd_vma)); | |
197 | for (j = 0; j < nbr_sections; j++) | |
198 | first_symbol[j] = NULL; | |
199 | oso_file = sym; | |
200 | break; | |
201 | } | |
202 | continue; | |
203 | } | |
204 | ||
205 | if (sym->name == NULL || *sym->name == '\0') | |
206 | { | |
207 | /* Skip names that don't exist (shouldn't happen), or names | |
208 | that are null strings (may happen). */ | |
209 | continue; | |
210 | } | |
211 | ||
212 | if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) | |
213 | { | |
214 | struct minimal_symbol *msym; | |
215 | CORE_ADDR symaddr; | |
216 | ||
217 | /* Bfd symbols are section relative. */ | |
218 | symaddr = sym->value + sym->section->vma; | |
219 | ||
220 | /* Select global/local/weak symbols. Note that bfd puts abs | |
221 | symbols in their own section, so all symbols we are | |
222 | interested in will have a section. */ | |
223 | /* Relocate all non-absolute and non-TLS symbols by the | |
224 | section offset. */ | |
225 | if (sym->section != &bfd_abs_section | |
226 | && !(sym->section->flags & SEC_THREAD_LOCAL)) | |
227 | symaddr += offset; | |
228 | ||
229 | if (sym->section == &bfd_abs_section) | |
230 | ms_type = mst_abs; | |
231 | else if (sym->section->flags & SEC_CODE) | |
232 | { | |
233 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
234 | ms_type = mst_text; | |
235 | else | |
236 | ms_type = mst_file_text; | |
237 | } | |
238 | else if (sym->section->flags & SEC_ALLOC) | |
239 | { | |
240 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
241 | { | |
242 | if (sym->section->flags & SEC_LOAD) | |
243 | ms_type = mst_data; | |
244 | else | |
245 | ms_type = mst_bss; | |
246 | } | |
247 | else if (sym->flags & BSF_LOCAL) | |
248 | { | |
249 | /* Not a special stabs-in-elf symbol, do regular | |
250 | symbol processing. */ | |
251 | if (sym->section->flags & SEC_LOAD) | |
252 | ms_type = mst_file_data; | |
253 | else | |
254 | ms_type = mst_file_bss; | |
255 | } | |
256 | else | |
257 | ms_type = mst_unknown; | |
258 | } | |
259 | else | |
260 | continue; /* Skip this symbol. */ | |
261 | ||
262 | gdb_assert (sym->section->index < nbr_sections); | |
263 | if (oso_file != NULL | |
264 | && first_symbol[sym->section->index] == NULL) | |
265 | { | |
3188d986 | 266 | /* Standard symbols can directly relocate sections. */ |
a80b95ba TG |
267 | first_symbol[sym->section->index] = sym; |
268 | first_offset[sym->section->index] = symaddr; | |
269 | } | |
270 | ||
271 | msym = prim_record_minimal_symbol_and_info | |
272 | (sym->name, symaddr, ms_type, sym->section->index, | |
273 | sym->section, objfile); | |
274 | } | |
275 | } | |
276 | ||
3188d986 | 277 | /* Just in case there is no trailing SO entry. */ |
a80b95ba | 278 | if (oso_file != NULL) |
2d33f7b8 | 279 | macho_register_oso (oso_file, nbr_sections, first_symbol, first_offset); |
a80b95ba TG |
280 | } |
281 | ||
282 | /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), | |
283 | returns the length of the archive name. | |
284 | Returns -1 otherwise. */ | |
f192ea96 | 285 | |
a80b95ba TG |
286 | static int |
287 | get_archive_prefix_len (const char *name) | |
288 | { | |
289 | char *lparen; | |
290 | int name_len = strlen (name); | |
291 | ||
292 | if (name_len == 0 || name[name_len - 1] != ')') | |
293 | return -1; | |
294 | ||
295 | lparen = strrchr (name, '('); | |
296 | if (lparen == NULL || lparen == name) | |
297 | return -1; | |
298 | return lparen - name; | |
299 | } | |
300 | ||
f192ea96 TG |
301 | static int |
302 | oso_el_compare_name (const void *vl, const void *vr) | |
303 | { | |
304 | const oso_el *l = (const oso_el *)vl; | |
305 | const oso_el *r = (const oso_el *)vr; | |
306 | ||
307 | return strcmp (l->name, r->name); | |
308 | } | |
309 | ||
310 | /* Add an oso file as a symbol file. */ | |
311 | ||
312 | static void | |
bdfed3bc TG |
313 | macho_add_oso_symfile (oso_el *oso, bfd *abfd, |
314 | struct objfile *main_objfile, int symfile_flags) | |
f192ea96 | 315 | { |
bdfed3bc | 316 | struct objfile *objfile; |
f192ea96 TG |
317 | int i; |
318 | char leading_char; | |
319 | ||
320 | if (mach_o_debug_level > 0) | |
321 | printf_unfiltered (_("Loading symbols from oso: %s\n"), oso->name); | |
2d33f7b8 | 322 | |
f192ea96 TG |
323 | if (!bfd_check_format (abfd, bfd_object)) |
324 | { | |
325 | warning (_("`%s': can't read symbols: %s."), oso->name, | |
326 | bfd_errmsg (bfd_get_error ())); | |
327 | bfd_close (abfd); | |
328 | return; | |
329 | } | |
330 | ||
331 | bfd_set_cacheable (abfd, 1); | |
f18b4cab TG |
332 | |
333 | /* Relocate sections. */ | |
f192ea96 TG |
334 | |
335 | leading_char = bfd_get_symbol_leading_char (main_objfile->obfd); | |
336 | ||
f192ea96 | 337 | for (i = 0; i < oso->num_sections; i++) |
f192ea96 | 338 | { |
f18b4cab TG |
339 | asection *sect; |
340 | const char *sectname; | |
341 | bfd_vma vma; | |
342 | ||
343 | /* Empty slot. */ | |
344 | if (oso->symbols[i] == NULL) | |
345 | continue; | |
346 | ||
347 | if (oso->offsets[i]) | |
348 | vma = oso->offsets[i]; | |
349 | else | |
350 | { | |
351 | struct minimal_symbol *msym; | |
352 | const char *name = oso->symbols[i]->name; | |
353 | ||
354 | if (name[0] == leading_char) | |
355 | ++name; | |
356 | ||
357 | if (mach_o_debug_level > 3) | |
358 | printf_unfiltered (_("resolve sect %s with %s\n"), | |
359 | oso->symbols[i]->section->name, | |
360 | oso->symbols[i]->name); | |
361 | msym = lookup_minimal_symbol (name, NULL, main_objfile); | |
362 | if (msym == NULL) | |
363 | { | |
364 | warning (_("can't find symbol '%s' in minsymtab"), name); | |
365 | continue; | |
366 | } | |
367 | else | |
368 | vma = SYMBOL_VALUE_ADDRESS (msym); | |
369 | } | |
370 | sectname = (char *)oso->symbols[i]->section->name; | |
371 | ||
372 | sect = bfd_get_section_by_name (abfd, sectname); | |
373 | if (sect == NULL) | |
374 | { | |
375 | warning (_("can't find section '%s' in OSO file %s"), | |
376 | sectname, oso->name); | |
377 | continue; | |
378 | } | |
379 | bfd_set_section_vma (abfd, sect, vma); | |
380 | ||
381 | if (mach_o_debug_level > 1) | |
f192ea96 | 382 | printf_unfiltered (_(" %s: %s\n"), |
f18b4cab | 383 | core_addr_to_string (vma), sectname); |
f192ea96 TG |
384 | } |
385 | ||
bdfed3bc TG |
386 | /* Make sure that the filename was malloc'ed. The current filename comes |
387 | either from an OSO symbol name or from an archive name. Memory for both | |
388 | is not managed by gdb. */ | |
389 | abfd->filename = xstrdup (abfd->filename); | |
390 | ||
f18b4cab TG |
391 | gdb_assert (current_oso.symbol_table == NULL); |
392 | current_oso.main_objfile = main_objfile; | |
393 | ||
bdfed3bc TG |
394 | /* We need to clear SYMFILE_MAINLINE to avoid interractive question |
395 | from symfile.c:symbol_file_add_with_addrs_or_offsets. */ | |
396 | objfile = symbol_file_add_from_bfd | |
f18b4cab | 397 | (abfd, symfile_flags & ~(SYMFILE_MAINLINE | SYMFILE_VERBOSE), NULL, |
bdfed3bc TG |
398 | main_objfile->flags & (OBJF_REORDERED | OBJF_SHARED |
399 | | OBJF_READNOW | OBJF_USERLOADED)); | |
400 | add_separate_debug_objfile (objfile, main_objfile); | |
f18b4cab TG |
401 | |
402 | current_oso.main_objfile = NULL; | |
403 | if (current_oso.symbol_table) | |
404 | { | |
405 | xfree (current_oso.symbol_table); | |
406 | current_oso.symbol_table = NULL; | |
407 | } | |
f192ea96 TG |
408 | } |
409 | ||
a80b95ba | 410 | /* Read symbols from the vector of oso files. */ |
f192ea96 | 411 | |
a80b95ba | 412 | static void |
2d33f7b8 | 413 | macho_symfile_read_all_oso (struct objfile *main_objfile, int symfile_flags) |
a80b95ba TG |
414 | { |
415 | int ix; | |
416 | VEC (oso_el) *vec; | |
417 | oso_el *oso; | |
a80b95ba TG |
418 | |
419 | vec = oso_vector; | |
420 | oso_vector = NULL; | |
421 | ||
f192ea96 TG |
422 | /* Sort oso by name so that files from libraries are gathered. */ |
423 | qsort (VEC_address (oso_el, vec), VEC_length (oso_el, vec), | |
424 | sizeof (oso_el), oso_el_compare_name); | |
a80b95ba | 425 | |
f192ea96 | 426 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso);) |
a80b95ba | 427 | { |
a80b95ba | 428 | int pfx_len; |
a80b95ba TG |
429 | |
430 | /* Check if this is a library name. */ | |
431 | pfx_len = get_archive_prefix_len (oso->name); | |
432 | if (pfx_len > 0) | |
433 | { | |
434 | bfd *archive_bfd; | |
435 | bfd *member_bfd; | |
f192ea96 TG |
436 | char *archive_name = XNEWVEC (char, pfx_len + 1); |
437 | int last_ix; | |
438 | oso_el *oso2; | |
439 | int ix2; | |
a80b95ba | 440 | |
a80b95ba TG |
441 | memcpy (archive_name, oso->name, pfx_len); |
442 | archive_name[pfx_len] = '\0'; | |
443 | ||
f192ea96 TG |
444 | /* Compute number of oso for this archive. */ |
445 | for (last_ix = ix; | |
446 | VEC_iterate (oso_el, vec, last_ix, oso2); last_ix++) | |
447 | { | |
448 | if (strncmp (oso2->name, archive_name, pfx_len) != 0) | |
449 | break; | |
450 | } | |
451 | ||
a80b95ba TG |
452 | /* Open the archive and check the format. */ |
453 | archive_bfd = bfd_openr (archive_name, gnutarget); | |
454 | if (archive_bfd == NULL) | |
455 | { | |
456 | warning (_("Could not open OSO archive file \"%s\""), | |
457 | archive_name); | |
f192ea96 | 458 | ix = last_ix; |
a80b95ba TG |
459 | continue; |
460 | } | |
461 | if (!bfd_check_format (archive_bfd, bfd_archive)) | |
462 | { | |
463 | warning (_("OSO archive file \"%s\" not an archive."), | |
464 | archive_name); | |
465 | bfd_close (archive_bfd); | |
f192ea96 | 466 | ix = last_ix; |
a80b95ba TG |
467 | continue; |
468 | } | |
469 | member_bfd = bfd_openr_next_archived_file (archive_bfd, NULL); | |
470 | ||
471 | if (member_bfd == NULL) | |
472 | { | |
473 | warning (_("Could not read archive members out of " | |
474 | "OSO archive \"%s\""), archive_name); | |
475 | bfd_close (archive_bfd); | |
f192ea96 | 476 | ix = last_ix; |
a80b95ba TG |
477 | continue; |
478 | } | |
f192ea96 TG |
479 | |
480 | /* Load all oso in this library. */ | |
a80b95ba TG |
481 | while (member_bfd != NULL) |
482 | { | |
f192ea96 | 483 | bfd *prev; |
a80b95ba | 484 | const char *member_name = member_bfd->filename; |
f192ea96 TG |
485 | int member_len = strlen (member_name); |
486 | ||
ab7e10a0 | 487 | /* If this member is referenced, add it as a symfile. */ |
f192ea96 TG |
488 | for (ix2 = ix; ix2 < last_ix; ix2++) |
489 | { | |
490 | oso2 = VEC_index (oso_el, vec, ix2); | |
491 | ||
492 | if (oso2->name | |
493 | && strlen (oso2->name) == pfx_len + member_len + 2 | |
494 | && !memcmp (member_name, oso2->name + pfx_len + 1, | |
495 | member_len)) | |
496 | { | |
bdfed3bc TG |
497 | macho_add_oso_symfile (oso2, member_bfd, |
498 | main_objfile, symfile_flags); | |
f192ea96 TG |
499 | oso2->name = NULL; |
500 | break; | |
501 | } | |
502 | } | |
503 | ||
504 | prev = member_bfd; | |
a80b95ba TG |
505 | member_bfd = bfd_openr_next_archived_file |
506 | (archive_bfd, member_bfd); | |
ab7e10a0 TG |
507 | |
508 | /* Free previous member if not referenced by an oso. */ | |
509 | if (ix2 >= last_ix) | |
f192ea96 | 510 | bfd_close (prev); |
a80b95ba | 511 | } |
f192ea96 TG |
512 | for (ix2 = ix; ix2 < last_ix; ix2++) |
513 | { | |
514 | oso_el *oso2 = VEC_index (oso_el, vec, ix2); | |
515 | ||
516 | if (oso2->name != NULL) | |
517 | warning (_("Could not find specified archive member " | |
518 | "for OSO name \"%s\""), oso->name); | |
519 | } | |
520 | ix = last_ix; | |
a80b95ba TG |
521 | } |
522 | else | |
523 | { | |
f192ea96 | 524 | bfd *abfd; |
a80b95ba TG |
525 | |
526 | abfd = bfd_openr (oso->name, gnutarget); | |
527 | if (!abfd) | |
f192ea96 TG |
528 | warning (_("`%s': can't open to read symbols: %s."), oso->name, |
529 | bfd_errmsg (bfd_get_error ())); | |
530 | else | |
bdfed3bc | 531 | macho_add_oso_symfile (oso, abfd, main_objfile, symfile_flags); |
f192ea96 TG |
532 | |
533 | ix++; | |
534 | } | |
535 | } | |
536 | ||
537 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso); ix++) | |
538 | { | |
a80b95ba TG |
539 | xfree (oso->symbols); |
540 | xfree (oso->offsets); | |
541 | } | |
542 | VEC_free (oso_el, vec); | |
543 | } | |
544 | ||
545 | /* DSYM (debug symbols) files contain the debug info of an executable. | |
546 | This is a separate file created by dsymutil(1) and is similar to debug | |
547 | link feature on ELF. | |
548 | DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the | |
549 | executable name and the executable base name to get the DSYM file name. */ | |
550 | #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" | |
551 | ||
552 | /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it. | |
553 | Return NULL if no valid dsym file is found. */ | |
f192ea96 | 554 | |
a80b95ba TG |
555 | static bfd * |
556 | macho_check_dsym (struct objfile *objfile) | |
557 | { | |
558 | size_t name_len = strlen (objfile->name); | |
559 | size_t dsym_len = strlen (DSYM_SUFFIX); | |
560 | const char *base_name = lbasename (objfile->name); | |
561 | size_t base_len = strlen (base_name); | |
562 | char *dsym_filename = alloca (name_len + dsym_len + base_len + 1); | |
563 | bfd *dsym_bfd; | |
65ccb109 TG |
564 | bfd_mach_o_load_command *main_uuid; |
565 | bfd_mach_o_load_command *dsym_uuid; | |
a80b95ba TG |
566 | |
567 | strcpy (dsym_filename, objfile->name); | |
568 | strcpy (dsym_filename + name_len, DSYM_SUFFIX); | |
569 | strcpy (dsym_filename + name_len + dsym_len, base_name); | |
570 | ||
571 | if (access (dsym_filename, R_OK) != 0) | |
572 | return NULL; | |
573 | ||
65ccb109 TG |
574 | if (bfd_mach_o_lookup_command (objfile->obfd, |
575 | BFD_MACH_O_LC_UUID, &main_uuid) == 0) | |
a80b95ba TG |
576 | { |
577 | warning (_("can't find UUID in %s"), objfile->name); | |
578 | return NULL; | |
579 | } | |
a80b95ba TG |
580 | dsym_filename = xstrdup (dsym_filename); |
581 | dsym_bfd = bfd_openr (dsym_filename, gnutarget); | |
582 | if (dsym_bfd == NULL) | |
583 | { | |
584 | warning (_("can't open dsym file %s"), dsym_filename); | |
585 | xfree (dsym_filename); | |
586 | return NULL; | |
587 | } | |
588 | ||
589 | if (!bfd_check_format (dsym_bfd, bfd_object)) | |
590 | { | |
591 | bfd_close (dsym_bfd); | |
592 | warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); | |
593 | xfree (dsym_filename); | |
594 | return NULL; | |
595 | } | |
596 | ||
65ccb109 TG |
597 | if (bfd_mach_o_lookup_command (dsym_bfd, |
598 | BFD_MACH_O_LC_UUID, &dsym_uuid) == 0) | |
a80b95ba TG |
599 | { |
600 | warning (_("can't find UUID in %s"), dsym_filename); | |
601 | bfd_close (dsym_bfd); | |
602 | xfree (dsym_filename); | |
603 | return NULL; | |
604 | } | |
65ccb109 TG |
605 | if (memcmp (dsym_uuid->command.uuid.uuid, main_uuid->command.uuid.uuid, |
606 | sizeof (main_uuid->command.uuid.uuid))) | |
a80b95ba TG |
607 | { |
608 | warning (_("dsym file UUID doesn't match the one in %s"), objfile->name); | |
609 | bfd_close (dsym_bfd); | |
610 | xfree (dsym_filename); | |
611 | return NULL; | |
612 | } | |
613 | return dsym_bfd; | |
a80b95ba TG |
614 | } |
615 | ||
616 | static void | |
f4352531 | 617 | macho_symfile_read (struct objfile *objfile, int symfile_flags) |
a80b95ba TG |
618 | { |
619 | bfd *abfd = objfile->obfd; | |
620 | struct cleanup *back_to; | |
621 | CORE_ADDR offset; | |
622 | long storage_needed; | |
623 | bfd *dsym_bfd; | |
624 | ||
625 | init_minimal_symbol_collection (); | |
626 | back_to = make_cleanup_discard_minimal_symbols (); | |
627 | ||
628 | /* Get symbols from the symbol table only if the file is an executable. | |
629 | The symbol table of object files is not relocated and is expected to | |
630 | be in the executable. */ | |
cf1061c0 | 631 | if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
a80b95ba TG |
632 | { |
633 | /* Process the normal symbol table first. */ | |
634 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); | |
635 | if (storage_needed < 0) | |
636 | error (_("Can't read symbols from %s: %s"), | |
637 | bfd_get_filename (objfile->obfd), | |
638 | bfd_errmsg (bfd_get_error ())); | |
639 | ||
640 | if (storage_needed > 0) | |
641 | { | |
642 | asymbol **symbol_table; | |
643 | long symcount; | |
644 | ||
645 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
646 | make_cleanup (xfree, symbol_table); | |
647 | symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table); | |
648 | ||
649 | if (symcount < 0) | |
650 | error (_("Can't read symbols from %s: %s"), | |
651 | bfd_get_filename (objfile->obfd), | |
652 | bfd_errmsg (bfd_get_error ())); | |
653 | ||
654 | macho_symtab_read (objfile, symcount, symbol_table); | |
655 | } | |
656 | ||
657 | install_minimal_symbols (objfile); | |
658 | ||
cf1061c0 TG |
659 | /* Try to read .eh_frame / .debug_frame. */ |
660 | /* First, locate these sections. We ignore the result status | |
661 | as it only checks for debug info. */ | |
662 | dwarf2_has_info (objfile); | |
663 | dwarf2_build_frame_info (objfile); | |
664 | ||
a80b95ba TG |
665 | /* Check for DSYM file. */ |
666 | dsym_bfd = macho_check_dsym (objfile); | |
667 | if (dsym_bfd != NULL) | |
668 | { | |
669 | int ix; | |
670 | oso_el *oso; | |
6414f3fd | 671 | struct bfd_section *asect, *dsect; |
a80b95ba TG |
672 | |
673 | if (mach_o_debug_level > 0) | |
674 | printf_unfiltered (_("dsym file found\n")); | |
675 | ||
676 | /* Remove oso. They won't be used. */ | |
677 | for (ix = 0; VEC_iterate (oso_el, oso_vector, ix, oso); ix++) | |
678 | { | |
679 | xfree (oso->symbols); | |
680 | xfree (oso->offsets); | |
681 | } | |
682 | VEC_free (oso_el, oso_vector); | |
683 | oso_vector = NULL; | |
684 | ||
6414f3fd TG |
685 | /* Set dsym section size. */ |
686 | for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections; | |
687 | asect && dsect; | |
688 | asect = asect->next, dsect = dsect->next) | |
689 | { | |
690 | if (strcmp (asect->name, dsect->name) != 0) | |
691 | break; | |
692 | bfd_set_section_size (dsym_bfd, dsect, | |
693 | bfd_get_section_size (asect)); | |
694 | } | |
695 | ||
2480cfa0 TG |
696 | /* Add the dsym file as a separate file. */ |
697 | symbol_file_add_separate (dsym_bfd, symfile_flags, objfile); | |
a80b95ba | 698 | |
cf1061c0 | 699 | /* Don't try to read dwarf2 from main file or shared libraries. */ |
2480cfa0 | 700 | return; |
a80b95ba TG |
701 | } |
702 | } | |
703 | ||
704 | if (dwarf2_has_info (objfile)) | |
705 | { | |
706 | /* DWARF 2 sections */ | |
f29dff0a | 707 | dwarf2_build_psymtabs (objfile); |
a80b95ba TG |
708 | } |
709 | ||
cf1061c0 TG |
710 | /* Do not try to read .eh_frame/.debug_frame as they are not relocated |
711 | and dwarf2_build_frame_info cannot deal with unrelocated sections. */ | |
a80b95ba TG |
712 | |
713 | /* Then the oso. */ | |
714 | if (oso_vector != NULL) | |
2d33f7b8 | 715 | macho_symfile_read_all_oso (objfile, symfile_flags); |
a80b95ba TG |
716 | } |
717 | ||
f18b4cab TG |
718 | static bfd_byte * |
719 | macho_symfile_relocate (struct objfile *objfile, asection *sectp, | |
720 | bfd_byte *buf) | |
721 | { | |
722 | bfd *abfd = objfile->obfd; | |
723 | ||
724 | /* We're only interested in sections with relocation | |
725 | information. */ | |
726 | if ((sectp->flags & SEC_RELOC) == 0) | |
727 | return NULL; | |
728 | ||
729 | if (mach_o_debug_level > 0) | |
730 | printf_unfiltered (_("Relocate section '%s' of %s\n"), | |
731 | sectp->name, objfile->name); | |
732 | ||
733 | if (current_oso.symbol_table == NULL) | |
734 | { | |
735 | int storage; | |
736 | int i; | |
737 | char leading_char; | |
738 | ||
739 | storage = bfd_get_symtab_upper_bound (abfd); | |
740 | current_oso.symbol_table = (asymbol **) xmalloc (storage); | |
741 | bfd_canonicalize_symtab (abfd, current_oso.symbol_table); | |
742 | ||
743 | leading_char = bfd_get_symbol_leading_char (abfd); | |
744 | ||
745 | for (i = 0; current_oso.symbol_table[i]; i++) | |
746 | { | |
747 | asymbol *sym = current_oso.symbol_table[i]; | |
748 | ||
749 | if (bfd_is_com_section (sym->section)) | |
750 | { | |
751 | /* This one must be solved. */ | |
752 | struct minimal_symbol *msym; | |
753 | const char *name = sym->name; | |
754 | ||
755 | if (name[0] == leading_char) | |
756 | name++; | |
757 | ||
758 | msym = lookup_minimal_symbol | |
759 | (name, NULL, current_oso.main_objfile); | |
760 | if (msym == NULL) | |
761 | { | |
762 | warning (_("can't find symbol '%s' in minsymtab"), name); | |
763 | continue; | |
764 | } | |
765 | else | |
766 | { | |
767 | sym->section = &bfd_abs_section; | |
768 | sym->value = SYMBOL_VALUE_ADDRESS (msym); | |
769 | } | |
770 | } | |
771 | } | |
772 | } | |
773 | ||
774 | return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); | |
775 | } | |
776 | ||
a80b95ba TG |
777 | static void |
778 | macho_symfile_finish (struct objfile *objfile) | |
779 | { | |
780 | } | |
781 | ||
782 | static void | |
783 | macho_symfile_offsets (struct objfile *objfile, | |
784 | struct section_addr_info *addrs) | |
785 | { | |
786 | unsigned int i; | |
787 | unsigned int num_sections; | |
788 | struct obj_section *osect; | |
789 | ||
790 | /* Allocate section_offsets. */ | |
791 | objfile->num_sections = bfd_count_sections (objfile->obfd); | |
792 | objfile->section_offsets = (struct section_offsets *) | |
793 | obstack_alloc (&objfile->objfile_obstack, | |
794 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
795 | memset (objfile->section_offsets, 0, | |
796 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
797 | ||
798 | /* This code is run when we first add the objfile with | |
799 | symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are | |
800 | passed in. The place in symfile.c where the addrs are applied | |
801 | depends on the addrs having section names. But in the dyld code | |
802 | we build an anonymous array of addrs, so that code is a no-op. | |
803 | Because of that, we have to apply the addrs to the sections here. | |
804 | N.B. if an objfile slides after we've already created it, then it | |
805 | goes through objfile_relocate. */ | |
806 | ||
807 | for (i = 0; i < addrs->num_sections; i++) | |
808 | { | |
809 | if (addrs->other[i].name == NULL) | |
810 | continue; | |
811 | ||
812 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
813 | { | |
814 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
815 | ||
816 | if (strcmp (bfd_sect_name, addrs->other[i].name) == 0) | |
817 | { | |
818 | obj_section_offset (osect) = addrs->other[i].addr; | |
819 | break; | |
820 | } | |
821 | } | |
822 | } | |
823 | ||
824 | objfile->sect_index_text = 0; | |
825 | ||
826 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
827 | { | |
828 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
829 | int sect_index = osect->the_bfd_section->index; | |
cf1061c0 TG |
830 | |
831 | if (strncmp (bfd_sect_name, "LC_SEGMENT.", 11) == 0) | |
832 | bfd_sect_name += 11; | |
833 | if (strcmp (bfd_sect_name, "__TEXT") == 0 | |
834 | || strcmp (bfd_sect_name, "__TEXT.__text") == 0) | |
a80b95ba TG |
835 | objfile->sect_index_text = sect_index; |
836 | } | |
837 | } | |
838 | ||
839 | static struct sym_fns macho_sym_fns = { | |
840 | bfd_target_mach_o_flavour, | |
841 | ||
842 | macho_new_init, /* sym_new_init: init anything gbl to entire symtab */ | |
843 | macho_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
844 | macho_symfile_read, /* sym_read: read a symbol file into symtab */ | |
845 | macho_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
846 | macho_symfile_offsets, /* sym_offsets: xlate external to internal form */ | |
033c64b7 TG |
847 | default_symfile_segments, /* sym_segments: Get segment information from |
848 | a file. */ | |
ac8035ab | 849 | NULL, /* sym_read_linetable */ |
f18b4cab | 850 | macho_symfile_relocate, /* sym_relocate: Relocate a debug section. */ |
ac8035ab | 851 | |
a80b95ba TG |
852 | NULL /* next: pointer to next struct sym_fns */ |
853 | }; | |
854 | ||
855 | void | |
856 | _initialize_machoread () | |
857 | { | |
858 | add_symtab_fns (&macho_sym_fns); | |
859 | ||
860 | add_setshow_zinteger_cmd ("mach-o", class_obscure, | |
861 | &mach_o_debug_level, _("\ | |
862 | Set if printing Mach-O symbols processing."), _("\ | |
863 | Show if printing Mach-O symbols processing."), NULL, | |
864 | NULL, NULL, | |
865 | &setdebuglist, &showdebuglist); | |
866 | } |