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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
7b6bb8da | 2 | Copyright (C) 2008, 2009, 2010, 2011 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" | |
ccefe4c4 | 35 | #include "psympriv.h" |
a80b95ba TG |
36 | |
37 | #include <string.h> | |
38 | ||
39 | /* If non-zero displays debugging message. */ | |
40 | static int mach_o_debug_level = 0; | |
41 | ||
a80b95ba TG |
42 | /* Dwarf debugging information are never in the final executable. They stay |
43 | in object files and the executable contains the list of object files read | |
44 | during the link. | |
45 | Each time an oso (other source) is found in the executable, the reader | |
46 | creates such a structure. They are read after the processing of the | |
025bb325 MS |
47 | executable. */ |
48 | ||
a80b95ba TG |
49 | typedef struct oso_el |
50 | { | |
51 | /* Object file name. */ | |
52 | const char *name; | |
53 | ||
54 | /* Associated time stamp. */ | |
55 | unsigned long mtime; | |
56 | ||
57 | /* Number of sections. This is the length of SYMBOLS and OFFSETS array. */ | |
58 | int num_sections; | |
59 | ||
60 | /* Each seaction of the object file is represented by a symbol and its | |
3188d986 TG |
61 | offset. If the offset is 0, we assume that the symbol is at offset 0 |
62 | in the OSO object file and a symbol lookup in the main file is | |
63 | required to get the offset. */ | |
a80b95ba TG |
64 | asymbol **symbols; |
65 | bfd_vma *offsets; | |
66 | } | |
67 | oso_el; | |
68 | ||
2d33f7b8 TG |
69 | /* Vector of object files to be read after the executable. This is one |
70 | global variable but it's life-time is the one of macho_symfile_read. */ | |
a80b95ba TG |
71 | DEF_VEC_O (oso_el); |
72 | static VEC (oso_el) *oso_vector; | |
73 | ||
f18b4cab TG |
74 | struct macho_oso_data |
75 | { | |
76 | /* Per objfile symbol table. This is used to apply relocation to sections | |
77 | It is loaded only once, then relocated, and free after sections are | |
78 | relocated. */ | |
79 | asymbol **symbol_table; | |
80 | ||
81 | /* The offsets for this objfile. Used to relocate the symbol_table. */ | |
82 | struct oso_el *oso; | |
83 | ||
84 | struct objfile *main_objfile; | |
85 | }; | |
86 | ||
87 | /* Data for OSO being processed. */ | |
88 | ||
89 | static struct macho_oso_data current_oso; | |
90 | ||
2d33f7b8 TG |
91 | static void |
92 | macho_new_init (struct objfile *objfile) | |
93 | { | |
94 | } | |
95 | ||
96 | static void | |
97 | macho_symfile_init (struct objfile *objfile) | |
98 | { | |
99 | objfile->flags |= OBJF_REORDERED; | |
100 | init_entry_point_info (objfile); | |
101 | } | |
102 | ||
103 | /* Add a new OSO to the vector of OSO to load. */ | |
f192ea96 | 104 | |
a80b95ba | 105 | static void |
2d33f7b8 TG |
106 | macho_register_oso (const asymbol *oso_sym, int nbr_sections, |
107 | asymbol **symbols, bfd_vma *offsets) | |
a80b95ba TG |
108 | { |
109 | oso_el el; | |
110 | ||
111 | el.name = oso_sym->name; | |
112 | el.mtime = oso_sym->value; | |
113 | el.num_sections = nbr_sections; | |
114 | el.symbols = symbols; | |
115 | el.offsets = offsets; | |
116 | VEC_safe_push (oso_el, oso_vector, &el); | |
117 | } | |
118 | ||
119 | /* Build the minimal symbol table from SYMBOL_TABLE of length | |
120 | NUMBER_OF_SYMBOLS for OBJFILE. | |
121 | Read OSO files at the end. */ | |
f192ea96 | 122 | |
a80b95ba TG |
123 | static void |
124 | macho_symtab_read (struct objfile *objfile, | |
125 | long number_of_symbols, asymbol **symbol_table) | |
126 | { | |
127 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
128 | long storage_needed; | |
a80b95ba TG |
129 | long i, j; |
130 | CORE_ADDR offset; | |
131 | enum minimal_symbol_type ms_type; | |
132 | unsigned int nbr_sections = bfd_count_sections (objfile->obfd); | |
133 | asymbol **first_symbol = NULL; | |
134 | bfd_vma *first_offset = NULL; | |
135 | const asymbol *oso_file = NULL; | |
136 | ||
137 | for (i = 0; i < number_of_symbols; i++) | |
138 | { | |
bb00b29d TG |
139 | asymbol *sym = symbol_table[i]; |
140 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
141 | ||
a80b95ba TG |
142 | offset = ANOFFSET (objfile->section_offsets, sym->section->index); |
143 | ||
144 | if (sym->flags & BSF_DEBUGGING) | |
145 | { | |
a80b95ba TG |
146 | bfd_vma addr; |
147 | ||
3188d986 TG |
148 | /* Debugging symbols are used to collect OSO file names as well |
149 | as section offsets. */ | |
150 | ||
bb00b29d | 151 | switch (mach_o_sym->n_type) |
a80b95ba TG |
152 | { |
153 | case N_SO: | |
3188d986 TG |
154 | /* An empty SO entry terminates a chunk for an OSO file. */ |
155 | if ((sym->name == NULL || sym->name[0] == 0) && oso_file != NULL) | |
a80b95ba | 156 | { |
2d33f7b8 TG |
157 | macho_register_oso (oso_file, nbr_sections, |
158 | first_symbol, first_offset); | |
a80b95ba TG |
159 | first_symbol = NULL; |
160 | first_offset = NULL; | |
161 | oso_file = NULL; | |
162 | } | |
163 | break; | |
164 | case N_FUN: | |
165 | case N_STSYM: | |
166 | if (sym->name == NULL || sym->name[0] == '\0') | |
167 | break; | |
168 | /* Fall through. */ | |
169 | case N_BNSYM: | |
170 | gdb_assert (oso_file != NULL); | |
171 | addr = sym->value | |
172 | + bfd_get_section_vma (sym->section->bfd, sym->section); | |
173 | if (addr != 0 | |
174 | && first_symbol[sym->section->index] == NULL) | |
175 | { | |
3188d986 | 176 | /* These STAB entries can directly relocate a section. */ |
a80b95ba TG |
177 | first_symbol[sym->section->index] = sym; |
178 | first_offset[sym->section->index] = addr + offset; | |
179 | } | |
180 | break; | |
181 | case N_GSYM: | |
182 | gdb_assert (oso_file != NULL); | |
183 | if (first_symbol[sym->section->index] == NULL) | |
3188d986 TG |
184 | { |
185 | /* This STAB entry needs a symbol look-up to relocate | |
186 | the section. */ | |
187 | first_symbol[sym->section->index] = sym; | |
188 | first_offset[sym->section->index] = 0; | |
189 | } | |
a80b95ba TG |
190 | break; |
191 | case N_OSO: | |
3188d986 | 192 | /* New OSO file. */ |
a80b95ba TG |
193 | gdb_assert (oso_file == NULL); |
194 | first_symbol = (asymbol **)xmalloc (nbr_sections | |
195 | * sizeof (asymbol *)); | |
196 | first_offset = (bfd_vma *)xmalloc (nbr_sections | |
197 | * sizeof (bfd_vma)); | |
198 | for (j = 0; j < nbr_sections; j++) | |
199 | first_symbol[j] = NULL; | |
200 | oso_file = sym; | |
201 | break; | |
202 | } | |
203 | continue; | |
204 | } | |
205 | ||
206 | if (sym->name == NULL || *sym->name == '\0') | |
207 | { | |
208 | /* Skip names that don't exist (shouldn't happen), or names | |
025bb325 | 209 | that are null strings (may happen). */ |
a80b95ba TG |
210 | continue; |
211 | } | |
212 | ||
213 | if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) | |
214 | { | |
215 | struct minimal_symbol *msym; | |
216 | CORE_ADDR symaddr; | |
217 | ||
025bb325 | 218 | /* Bfd symbols are section relative. */ |
a80b95ba TG |
219 | symaddr = sym->value + sym->section->vma; |
220 | ||
221 | /* Select global/local/weak symbols. Note that bfd puts abs | |
222 | symbols in their own section, so all symbols we are | |
025bb325 | 223 | interested in will have a section. */ |
a80b95ba TG |
224 | /* Relocate all non-absolute and non-TLS symbols by the |
225 | section offset. */ | |
226 | if (sym->section != &bfd_abs_section | |
227 | && !(sym->section->flags & SEC_THREAD_LOCAL)) | |
228 | symaddr += offset; | |
229 | ||
230 | if (sym->section == &bfd_abs_section) | |
231 | ms_type = mst_abs; | |
232 | else if (sym->section->flags & SEC_CODE) | |
233 | { | |
234 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
235 | ms_type = mst_text; | |
236 | else | |
237 | ms_type = mst_file_text; | |
238 | } | |
239 | else if (sym->section->flags & SEC_ALLOC) | |
240 | { | |
241 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
242 | { | |
243 | if (sym->section->flags & SEC_LOAD) | |
244 | ms_type = mst_data; | |
245 | else | |
246 | ms_type = mst_bss; | |
247 | } | |
248 | else if (sym->flags & BSF_LOCAL) | |
249 | { | |
250 | /* Not a special stabs-in-elf symbol, do regular | |
251 | symbol processing. */ | |
252 | if (sym->section->flags & SEC_LOAD) | |
253 | ms_type = mst_file_data; | |
254 | else | |
255 | ms_type = mst_file_bss; | |
256 | } | |
257 | else | |
258 | ms_type = mst_unknown; | |
259 | } | |
260 | else | |
025bb325 | 261 | continue; /* Skip this symbol. */ |
a80b95ba TG |
262 | |
263 | gdb_assert (sym->section->index < nbr_sections); | |
264 | if (oso_file != NULL | |
265 | && first_symbol[sym->section->index] == NULL) | |
266 | { | |
3188d986 | 267 | /* Standard symbols can directly relocate sections. */ |
a80b95ba TG |
268 | first_symbol[sym->section->index] = sym; |
269 | first_offset[sym->section->index] = symaddr; | |
270 | } | |
271 | ||
272 | msym = prim_record_minimal_symbol_and_info | |
273 | (sym->name, symaddr, ms_type, sym->section->index, | |
274 | sym->section, objfile); | |
275 | } | |
276 | } | |
277 | ||
3188d986 | 278 | /* Just in case there is no trailing SO entry. */ |
a80b95ba | 279 | if (oso_file != NULL) |
2d33f7b8 | 280 | macho_register_oso (oso_file, nbr_sections, first_symbol, first_offset); |
a80b95ba TG |
281 | } |
282 | ||
283 | /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), | |
284 | returns the length of the archive name. | |
285 | Returns -1 otherwise. */ | |
f192ea96 | 286 | |
a80b95ba TG |
287 | static int |
288 | get_archive_prefix_len (const char *name) | |
289 | { | |
290 | char *lparen; | |
291 | int name_len = strlen (name); | |
292 | ||
293 | if (name_len == 0 || name[name_len - 1] != ')') | |
294 | return -1; | |
295 | ||
296 | lparen = strrchr (name, '('); | |
297 | if (lparen == NULL || lparen == name) | |
298 | return -1; | |
299 | return lparen - name; | |
300 | } | |
301 | ||
f192ea96 TG |
302 | static int |
303 | oso_el_compare_name (const void *vl, const void *vr) | |
304 | { | |
305 | const oso_el *l = (const oso_el *)vl; | |
306 | const oso_el *r = (const oso_el *)vr; | |
307 | ||
308 | return strcmp (l->name, r->name); | |
309 | } | |
310 | ||
311 | /* Add an oso file as a symbol file. */ | |
312 | ||
313 | static void | |
bdfed3bc TG |
314 | macho_add_oso_symfile (oso_el *oso, bfd *abfd, |
315 | struct objfile *main_objfile, int symfile_flags) | |
f192ea96 | 316 | { |
bdfed3bc | 317 | struct objfile *objfile; |
f192ea96 TG |
318 | int i; |
319 | char leading_char; | |
320 | ||
321 | if (mach_o_debug_level > 0) | |
322 | printf_unfiltered (_("Loading symbols from oso: %s\n"), oso->name); | |
2d33f7b8 | 323 | |
f192ea96 TG |
324 | if (!bfd_check_format (abfd, bfd_object)) |
325 | { | |
326 | warning (_("`%s': can't read symbols: %s."), oso->name, | |
327 | bfd_errmsg (bfd_get_error ())); | |
328 | bfd_close (abfd); | |
329 | return; | |
330 | } | |
331 | ||
332 | bfd_set_cacheable (abfd, 1); | |
f18b4cab TG |
333 | |
334 | /* Relocate sections. */ | |
f192ea96 TG |
335 | |
336 | leading_char = bfd_get_symbol_leading_char (main_objfile->obfd); | |
337 | ||
f192ea96 | 338 | for (i = 0; i < oso->num_sections; i++) |
f192ea96 | 339 | { |
f18b4cab TG |
340 | asection *sect; |
341 | const char *sectname; | |
342 | bfd_vma vma; | |
343 | ||
344 | /* Empty slot. */ | |
345 | if (oso->symbols[i] == NULL) | |
346 | continue; | |
347 | ||
348 | if (oso->offsets[i]) | |
349 | vma = oso->offsets[i]; | |
350 | else | |
351 | { | |
352 | struct minimal_symbol *msym; | |
353 | const char *name = oso->symbols[i]->name; | |
354 | ||
355 | if (name[0] == leading_char) | |
356 | ++name; | |
357 | ||
358 | if (mach_o_debug_level > 3) | |
359 | printf_unfiltered (_("resolve sect %s with %s\n"), | |
360 | oso->symbols[i]->section->name, | |
361 | oso->symbols[i]->name); | |
362 | msym = lookup_minimal_symbol (name, NULL, main_objfile); | |
363 | if (msym == NULL) | |
364 | { | |
365 | warning (_("can't find symbol '%s' in minsymtab"), name); | |
366 | continue; | |
367 | } | |
368 | else | |
369 | vma = SYMBOL_VALUE_ADDRESS (msym); | |
370 | } | |
371 | sectname = (char *)oso->symbols[i]->section->name; | |
372 | ||
373 | sect = bfd_get_section_by_name (abfd, sectname); | |
374 | if (sect == NULL) | |
375 | { | |
376 | warning (_("can't find section '%s' in OSO file %s"), | |
377 | sectname, oso->name); | |
378 | continue; | |
379 | } | |
380 | bfd_set_section_vma (abfd, sect, vma); | |
381 | ||
382 | if (mach_o_debug_level > 1) | |
f192ea96 | 383 | printf_unfiltered (_(" %s: %s\n"), |
f18b4cab | 384 | core_addr_to_string (vma), sectname); |
f192ea96 TG |
385 | } |
386 | ||
bdfed3bc TG |
387 | /* Make sure that the filename was malloc'ed. The current filename comes |
388 | either from an OSO symbol name or from an archive name. Memory for both | |
389 | is not managed by gdb. */ | |
390 | abfd->filename = xstrdup (abfd->filename); | |
391 | ||
f18b4cab TG |
392 | gdb_assert (current_oso.symbol_table == NULL); |
393 | current_oso.main_objfile = main_objfile; | |
394 | ||
bdfed3bc TG |
395 | /* We need to clear SYMFILE_MAINLINE to avoid interractive question |
396 | from symfile.c:symbol_file_add_with_addrs_or_offsets. */ | |
397 | objfile = symbol_file_add_from_bfd | |
f18b4cab | 398 | (abfd, symfile_flags & ~(SYMFILE_MAINLINE | SYMFILE_VERBOSE), NULL, |
bdfed3bc TG |
399 | main_objfile->flags & (OBJF_REORDERED | OBJF_SHARED |
400 | | OBJF_READNOW | OBJF_USERLOADED)); | |
401 | add_separate_debug_objfile (objfile, main_objfile); | |
f18b4cab TG |
402 | |
403 | current_oso.main_objfile = NULL; | |
404 | if (current_oso.symbol_table) | |
405 | { | |
406 | xfree (current_oso.symbol_table); | |
407 | current_oso.symbol_table = NULL; | |
408 | } | |
f192ea96 TG |
409 | } |
410 | ||
a80b95ba | 411 | /* Read symbols from the vector of oso files. */ |
f192ea96 | 412 | |
a80b95ba | 413 | static void |
2d33f7b8 | 414 | macho_symfile_read_all_oso (struct objfile *main_objfile, int symfile_flags) |
a80b95ba TG |
415 | { |
416 | int ix; | |
417 | VEC (oso_el) *vec; | |
418 | oso_el *oso; | |
a80b95ba TG |
419 | |
420 | vec = oso_vector; | |
421 | oso_vector = NULL; | |
422 | ||
f192ea96 TG |
423 | /* Sort oso by name so that files from libraries are gathered. */ |
424 | qsort (VEC_address (oso_el, vec), VEC_length (oso_el, vec), | |
425 | sizeof (oso_el), oso_el_compare_name); | |
a80b95ba | 426 | |
f192ea96 | 427 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso);) |
a80b95ba | 428 | { |
a80b95ba | 429 | int pfx_len; |
a80b95ba TG |
430 | |
431 | /* Check if this is a library name. */ | |
432 | pfx_len = get_archive_prefix_len (oso->name); | |
433 | if (pfx_len > 0) | |
434 | { | |
435 | bfd *archive_bfd; | |
436 | bfd *member_bfd; | |
f192ea96 TG |
437 | char *archive_name = XNEWVEC (char, pfx_len + 1); |
438 | int last_ix; | |
439 | oso_el *oso2; | |
440 | int ix2; | |
a80b95ba | 441 | |
a80b95ba TG |
442 | memcpy (archive_name, oso->name, pfx_len); |
443 | archive_name[pfx_len] = '\0'; | |
444 | ||
f192ea96 TG |
445 | /* Compute number of oso for this archive. */ |
446 | for (last_ix = ix; | |
447 | VEC_iterate (oso_el, vec, last_ix, oso2); last_ix++) | |
448 | { | |
449 | if (strncmp (oso2->name, archive_name, pfx_len) != 0) | |
450 | break; | |
451 | } | |
452 | ||
a80b95ba TG |
453 | /* Open the archive and check the format. */ |
454 | archive_bfd = bfd_openr (archive_name, gnutarget); | |
455 | if (archive_bfd == NULL) | |
456 | { | |
457 | warning (_("Could not open OSO archive file \"%s\""), | |
458 | archive_name); | |
f192ea96 | 459 | ix = last_ix; |
a80b95ba TG |
460 | continue; |
461 | } | |
462 | if (!bfd_check_format (archive_bfd, bfd_archive)) | |
463 | { | |
464 | warning (_("OSO archive file \"%s\" not an archive."), | |
465 | archive_name); | |
466 | bfd_close (archive_bfd); | |
f192ea96 | 467 | ix = last_ix; |
a80b95ba TG |
468 | continue; |
469 | } | |
470 | member_bfd = bfd_openr_next_archived_file (archive_bfd, NULL); | |
471 | ||
472 | if (member_bfd == NULL) | |
473 | { | |
474 | warning (_("Could not read archive members out of " | |
475 | "OSO archive \"%s\""), archive_name); | |
476 | bfd_close (archive_bfd); | |
f192ea96 | 477 | ix = last_ix; |
a80b95ba TG |
478 | continue; |
479 | } | |
f192ea96 TG |
480 | |
481 | /* Load all oso in this library. */ | |
a80b95ba TG |
482 | while (member_bfd != NULL) |
483 | { | |
f192ea96 | 484 | bfd *prev; |
a80b95ba | 485 | const char *member_name = member_bfd->filename; |
f192ea96 TG |
486 | int member_len = strlen (member_name); |
487 | ||
ab7e10a0 | 488 | /* If this member is referenced, add it as a symfile. */ |
f192ea96 TG |
489 | for (ix2 = ix; ix2 < last_ix; ix2++) |
490 | { | |
491 | oso2 = VEC_index (oso_el, vec, ix2); | |
492 | ||
493 | if (oso2->name | |
494 | && strlen (oso2->name) == pfx_len + member_len + 2 | |
495 | && !memcmp (member_name, oso2->name + pfx_len + 1, | |
496 | member_len)) | |
497 | { | |
bdfed3bc TG |
498 | macho_add_oso_symfile (oso2, member_bfd, |
499 | main_objfile, symfile_flags); | |
f192ea96 TG |
500 | oso2->name = NULL; |
501 | break; | |
502 | } | |
503 | } | |
504 | ||
505 | prev = member_bfd; | |
a80b95ba TG |
506 | member_bfd = bfd_openr_next_archived_file |
507 | (archive_bfd, member_bfd); | |
ab7e10a0 TG |
508 | |
509 | /* Free previous member if not referenced by an oso. */ | |
510 | if (ix2 >= last_ix) | |
f192ea96 | 511 | bfd_close (prev); |
a80b95ba | 512 | } |
f192ea96 TG |
513 | for (ix2 = ix; ix2 < last_ix; ix2++) |
514 | { | |
515 | oso_el *oso2 = VEC_index (oso_el, vec, ix2); | |
516 | ||
517 | if (oso2->name != NULL) | |
518 | warning (_("Could not find specified archive member " | |
519 | "for OSO name \"%s\""), oso->name); | |
520 | } | |
521 | ix = last_ix; | |
a80b95ba TG |
522 | } |
523 | else | |
524 | { | |
f192ea96 | 525 | bfd *abfd; |
a80b95ba TG |
526 | |
527 | abfd = bfd_openr (oso->name, gnutarget); | |
528 | if (!abfd) | |
f192ea96 TG |
529 | warning (_("`%s': can't open to read symbols: %s."), oso->name, |
530 | bfd_errmsg (bfd_get_error ())); | |
531 | else | |
bdfed3bc | 532 | macho_add_oso_symfile (oso, abfd, main_objfile, symfile_flags); |
f192ea96 TG |
533 | |
534 | ix++; | |
535 | } | |
536 | } | |
537 | ||
538 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso); ix++) | |
539 | { | |
a80b95ba TG |
540 | xfree (oso->symbols); |
541 | xfree (oso->offsets); | |
542 | } | |
543 | VEC_free (oso_el, vec); | |
544 | } | |
545 | ||
546 | /* DSYM (debug symbols) files contain the debug info of an executable. | |
547 | This is a separate file created by dsymutil(1) and is similar to debug | |
548 | link feature on ELF. | |
549 | DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the | |
550 | executable name and the executable base name to get the DSYM file name. */ | |
551 | #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" | |
552 | ||
553 | /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it. | |
554 | Return NULL if no valid dsym file is found. */ | |
f192ea96 | 555 | |
a80b95ba TG |
556 | static bfd * |
557 | macho_check_dsym (struct objfile *objfile) | |
558 | { | |
559 | size_t name_len = strlen (objfile->name); | |
560 | size_t dsym_len = strlen (DSYM_SUFFIX); | |
561 | const char *base_name = lbasename (objfile->name); | |
562 | size_t base_len = strlen (base_name); | |
563 | char *dsym_filename = alloca (name_len + dsym_len + base_len + 1); | |
564 | bfd *dsym_bfd; | |
65ccb109 TG |
565 | bfd_mach_o_load_command *main_uuid; |
566 | bfd_mach_o_load_command *dsym_uuid; | |
a80b95ba TG |
567 | |
568 | strcpy (dsym_filename, objfile->name); | |
569 | strcpy (dsym_filename + name_len, DSYM_SUFFIX); | |
570 | strcpy (dsym_filename + name_len + dsym_len, base_name); | |
571 | ||
572 | if (access (dsym_filename, R_OK) != 0) | |
573 | return NULL; | |
574 | ||
65ccb109 TG |
575 | if (bfd_mach_o_lookup_command (objfile->obfd, |
576 | BFD_MACH_O_LC_UUID, &main_uuid) == 0) | |
a80b95ba TG |
577 | { |
578 | warning (_("can't find UUID in %s"), objfile->name); | |
579 | return NULL; | |
580 | } | |
a80b95ba TG |
581 | dsym_filename = xstrdup (dsym_filename); |
582 | dsym_bfd = bfd_openr (dsym_filename, gnutarget); | |
583 | if (dsym_bfd == NULL) | |
584 | { | |
585 | warning (_("can't open dsym file %s"), dsym_filename); | |
586 | xfree (dsym_filename); | |
587 | return NULL; | |
588 | } | |
589 | ||
590 | if (!bfd_check_format (dsym_bfd, bfd_object)) | |
591 | { | |
592 | bfd_close (dsym_bfd); | |
593 | warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); | |
594 | xfree (dsym_filename); | |
595 | return NULL; | |
596 | } | |
597 | ||
65ccb109 TG |
598 | if (bfd_mach_o_lookup_command (dsym_bfd, |
599 | BFD_MACH_O_LC_UUID, &dsym_uuid) == 0) | |
a80b95ba TG |
600 | { |
601 | warning (_("can't find UUID in %s"), dsym_filename); | |
602 | bfd_close (dsym_bfd); | |
603 | xfree (dsym_filename); | |
604 | return NULL; | |
605 | } | |
65ccb109 TG |
606 | if (memcmp (dsym_uuid->command.uuid.uuid, main_uuid->command.uuid.uuid, |
607 | sizeof (main_uuid->command.uuid.uuid))) | |
a80b95ba TG |
608 | { |
609 | warning (_("dsym file UUID doesn't match the one in %s"), objfile->name); | |
610 | bfd_close (dsym_bfd); | |
611 | xfree (dsym_filename); | |
612 | return NULL; | |
613 | } | |
614 | return dsym_bfd; | |
a80b95ba TG |
615 | } |
616 | ||
617 | static void | |
f4352531 | 618 | macho_symfile_read (struct objfile *objfile, int symfile_flags) |
a80b95ba TG |
619 | { |
620 | bfd *abfd = objfile->obfd; | |
621 | struct cleanup *back_to; | |
622 | CORE_ADDR offset; | |
623 | long storage_needed; | |
624 | bfd *dsym_bfd; | |
625 | ||
626 | init_minimal_symbol_collection (); | |
627 | back_to = make_cleanup_discard_minimal_symbols (); | |
628 | ||
629 | /* Get symbols from the symbol table only if the file is an executable. | |
630 | The symbol table of object files is not relocated and is expected to | |
631 | be in the executable. */ | |
cf1061c0 | 632 | if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
a80b95ba TG |
633 | { |
634 | /* Process the normal symbol table first. */ | |
635 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); | |
636 | if (storage_needed < 0) | |
637 | error (_("Can't read symbols from %s: %s"), | |
638 | bfd_get_filename (objfile->obfd), | |
639 | bfd_errmsg (bfd_get_error ())); | |
640 | ||
641 | if (storage_needed > 0) | |
642 | { | |
643 | asymbol **symbol_table; | |
644 | long symcount; | |
645 | ||
646 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
647 | make_cleanup (xfree, symbol_table); | |
648 | symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table); | |
649 | ||
650 | if (symcount < 0) | |
651 | error (_("Can't read symbols from %s: %s"), | |
652 | bfd_get_filename (objfile->obfd), | |
653 | bfd_errmsg (bfd_get_error ())); | |
654 | ||
655 | macho_symtab_read (objfile, symcount, symbol_table); | |
656 | } | |
657 | ||
658 | install_minimal_symbols (objfile); | |
659 | ||
cf1061c0 TG |
660 | /* Try to read .eh_frame / .debug_frame. */ |
661 | /* First, locate these sections. We ignore the result status | |
662 | as it only checks for debug info. */ | |
663 | dwarf2_has_info (objfile); | |
664 | dwarf2_build_frame_info (objfile); | |
665 | ||
a80b95ba TG |
666 | /* Check for DSYM file. */ |
667 | dsym_bfd = macho_check_dsym (objfile); | |
668 | if (dsym_bfd != NULL) | |
669 | { | |
670 | int ix; | |
671 | oso_el *oso; | |
6414f3fd | 672 | struct bfd_section *asect, *dsect; |
a80b95ba TG |
673 | |
674 | if (mach_o_debug_level > 0) | |
675 | printf_unfiltered (_("dsym file found\n")); | |
676 | ||
677 | /* Remove oso. They won't be used. */ | |
678 | for (ix = 0; VEC_iterate (oso_el, oso_vector, ix, oso); ix++) | |
679 | { | |
680 | xfree (oso->symbols); | |
681 | xfree (oso->offsets); | |
682 | } | |
683 | VEC_free (oso_el, oso_vector); | |
684 | oso_vector = NULL; | |
685 | ||
6414f3fd TG |
686 | /* Set dsym section size. */ |
687 | for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections; | |
688 | asect && dsect; | |
689 | asect = asect->next, dsect = dsect->next) | |
690 | { | |
691 | if (strcmp (asect->name, dsect->name) != 0) | |
692 | break; | |
693 | bfd_set_section_size (dsym_bfd, dsect, | |
694 | bfd_get_section_size (asect)); | |
695 | } | |
696 | ||
2480cfa0 TG |
697 | /* Add the dsym file as a separate file. */ |
698 | symbol_file_add_separate (dsym_bfd, symfile_flags, objfile); | |
a80b95ba | 699 | |
cf1061c0 | 700 | /* Don't try to read dwarf2 from main file or shared libraries. */ |
2480cfa0 | 701 | return; |
a80b95ba TG |
702 | } |
703 | } | |
704 | ||
705 | if (dwarf2_has_info (objfile)) | |
706 | { | |
707 | /* DWARF 2 sections */ | |
f29dff0a | 708 | dwarf2_build_psymtabs (objfile); |
a80b95ba TG |
709 | } |
710 | ||
cf1061c0 TG |
711 | /* Do not try to read .eh_frame/.debug_frame as they are not relocated |
712 | and dwarf2_build_frame_info cannot deal with unrelocated sections. */ | |
a80b95ba TG |
713 | |
714 | /* Then the oso. */ | |
715 | if (oso_vector != NULL) | |
2d33f7b8 | 716 | macho_symfile_read_all_oso (objfile, symfile_flags); |
a80b95ba TG |
717 | } |
718 | ||
f18b4cab TG |
719 | static bfd_byte * |
720 | macho_symfile_relocate (struct objfile *objfile, asection *sectp, | |
721 | bfd_byte *buf) | |
722 | { | |
723 | bfd *abfd = objfile->obfd; | |
724 | ||
725 | /* We're only interested in sections with relocation | |
726 | information. */ | |
727 | if ((sectp->flags & SEC_RELOC) == 0) | |
728 | return NULL; | |
729 | ||
730 | if (mach_o_debug_level > 0) | |
731 | printf_unfiltered (_("Relocate section '%s' of %s\n"), | |
732 | sectp->name, objfile->name); | |
733 | ||
734 | if (current_oso.symbol_table == NULL) | |
735 | { | |
736 | int storage; | |
737 | int i; | |
738 | char leading_char; | |
739 | ||
740 | storage = bfd_get_symtab_upper_bound (abfd); | |
741 | current_oso.symbol_table = (asymbol **) xmalloc (storage); | |
742 | bfd_canonicalize_symtab (abfd, current_oso.symbol_table); | |
743 | ||
744 | leading_char = bfd_get_symbol_leading_char (abfd); | |
745 | ||
746 | for (i = 0; current_oso.symbol_table[i]; i++) | |
747 | { | |
748 | asymbol *sym = current_oso.symbol_table[i]; | |
749 | ||
750 | if (bfd_is_com_section (sym->section)) | |
751 | { | |
752 | /* This one must be solved. */ | |
753 | struct minimal_symbol *msym; | |
754 | const char *name = sym->name; | |
755 | ||
756 | if (name[0] == leading_char) | |
757 | name++; | |
758 | ||
759 | msym = lookup_minimal_symbol | |
760 | (name, NULL, current_oso.main_objfile); | |
761 | if (msym == NULL) | |
762 | { | |
763 | warning (_("can't find symbol '%s' in minsymtab"), name); | |
764 | continue; | |
765 | } | |
766 | else | |
767 | { | |
768 | sym->section = &bfd_abs_section; | |
769 | sym->value = SYMBOL_VALUE_ADDRESS (msym); | |
770 | } | |
771 | } | |
772 | } | |
773 | } | |
774 | ||
775 | return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); | |
776 | } | |
777 | ||
a80b95ba TG |
778 | static void |
779 | macho_symfile_finish (struct objfile *objfile) | |
780 | { | |
781 | } | |
782 | ||
783 | static void | |
784 | macho_symfile_offsets (struct objfile *objfile, | |
785 | struct section_addr_info *addrs) | |
786 | { | |
787 | unsigned int i; | |
788 | unsigned int num_sections; | |
789 | struct obj_section *osect; | |
790 | ||
791 | /* Allocate section_offsets. */ | |
792 | objfile->num_sections = bfd_count_sections (objfile->obfd); | |
793 | objfile->section_offsets = (struct section_offsets *) | |
794 | obstack_alloc (&objfile->objfile_obstack, | |
795 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
796 | memset (objfile->section_offsets, 0, | |
797 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
798 | ||
799 | /* This code is run when we first add the objfile with | |
800 | symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are | |
801 | passed in. The place in symfile.c where the addrs are applied | |
802 | depends on the addrs having section names. But in the dyld code | |
803 | we build an anonymous array of addrs, so that code is a no-op. | |
804 | Because of that, we have to apply the addrs to the sections here. | |
805 | N.B. if an objfile slides after we've already created it, then it | |
806 | goes through objfile_relocate. */ | |
807 | ||
808 | for (i = 0; i < addrs->num_sections; i++) | |
809 | { | |
810 | if (addrs->other[i].name == NULL) | |
811 | continue; | |
812 | ||
813 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
814 | { | |
815 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
816 | ||
817 | if (strcmp (bfd_sect_name, addrs->other[i].name) == 0) | |
818 | { | |
819 | obj_section_offset (osect) = addrs->other[i].addr; | |
820 | break; | |
821 | } | |
822 | } | |
823 | } | |
824 | ||
825 | objfile->sect_index_text = 0; | |
826 | ||
827 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
828 | { | |
829 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
830 | int sect_index = osect->the_bfd_section->index; | |
cf1061c0 TG |
831 | |
832 | if (strncmp (bfd_sect_name, "LC_SEGMENT.", 11) == 0) | |
833 | bfd_sect_name += 11; | |
834 | if (strcmp (bfd_sect_name, "__TEXT") == 0 | |
835 | || strcmp (bfd_sect_name, "__TEXT.__text") == 0) | |
a80b95ba TG |
836 | objfile->sect_index_text = sect_index; |
837 | } | |
838 | } | |
839 | ||
00b5771c | 840 | static const struct sym_fns macho_sym_fns = { |
a80b95ba TG |
841 | bfd_target_mach_o_flavour, |
842 | ||
3e43a32a MS |
843 | macho_new_init, /* init anything gbl to entire symtab */ |
844 | macho_symfile_init, /* read initial info, setup for sym_read() */ | |
845 | macho_symfile_read, /* read a symbol file into symtab */ | |
b11896a5 | 846 | NULL, /* sym_read_psymbols */ |
3e43a32a MS |
847 | macho_symfile_finish, /* finished with file, cleanup */ |
848 | macho_symfile_offsets, /* xlate external to internal form */ | |
849 | default_symfile_segments, /* Get segment information from a file. */ | |
850 | NULL, | |
851 | macho_symfile_relocate, /* Relocate a debug section. */ | |
00b5771c | 852 | &psym_functions |
a80b95ba TG |
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, | |
3e43a32a MS |
861 | &mach_o_debug_level, |
862 | _("Set if printing Mach-O symbols processing."), | |
863 | _("Show if printing Mach-O symbols processing."), | |
864 | NULL, NULL, NULL, | |
a80b95ba TG |
865 | &setdebuglist, &showdebuglist); |
866 | } |