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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
e2882c85 | 2 | Copyright (C) 2008-2018 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> |
2cc9b304 | 37 | #include <algorithm> |
a80b95ba | 38 | |
a80b95ba | 39 | /* If non-zero displays debugging message. */ |
ccce17b0 | 40 | static unsigned int mach_o_debug_level = 0; |
a80b95ba | 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 | ||
2cc9b304 | 49 | struct oso_el |
a80b95ba | 50 | { |
2cc9b304 TT |
51 | oso_el (asymbol **oso_sym_, asymbol **end_sym_, unsigned int nbr_syms_) |
52 | : name((*oso_sym_)->name), | |
53 | mtime((*oso_sym_)->value), | |
54 | oso_sym(oso_sym_), | |
55 | end_sym(end_sym_), | |
56 | nbr_syms(nbr_syms_) | |
57 | { | |
58 | } | |
59 | ||
e4c5f296 | 60 | /* Object file name. Can also be a member name. */ |
a80b95ba TG |
61 | const char *name; |
62 | ||
63 | /* Associated time stamp. */ | |
64 | unsigned long mtime; | |
65 | ||
e4c5f296 TG |
66 | /* Stab symbols range for this OSO. */ |
67 | asymbol **oso_sym; | |
68 | asymbol **end_sym; | |
a80b95ba | 69 | |
e4c5f296 TG |
70 | /* Number of interesting stabs in the range. */ |
71 | unsigned int nbr_syms; | |
2cc9b304 | 72 | }; |
a80b95ba | 73 | |
2d33f7b8 TG |
74 | static void |
75 | macho_new_init (struct objfile *objfile) | |
76 | { | |
77 | } | |
78 | ||
79 | static void | |
80 | macho_symfile_init (struct objfile *objfile) | |
81 | { | |
82 | objfile->flags |= OBJF_REORDERED; | |
2d33f7b8 TG |
83 | } |
84 | ||
e4c5f296 TG |
85 | /* Add symbol SYM to the minimal symbol table of OBJFILE. */ |
86 | ||
87 | static void | |
8dddcb8f TT |
88 | macho_symtab_add_minsym (minimal_symbol_reader &reader, |
89 | struct objfile *objfile, const asymbol *sym) | |
e4c5f296 TG |
90 | { |
91 | if (sym->name == NULL || *sym->name == '\0') | |
92 | { | |
93 | /* Skip names that don't exist (shouldn't happen), or names | |
94 | that are null strings (may happen). */ | |
95 | return; | |
96 | } | |
97 | ||
98 | if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) | |
99 | { | |
100 | CORE_ADDR symaddr; | |
e4c5f296 TG |
101 | enum minimal_symbol_type ms_type; |
102 | ||
e4c5f296 TG |
103 | /* Bfd symbols are section relative. */ |
104 | symaddr = sym->value + sym->section->vma; | |
105 | ||
45dfa85a | 106 | if (sym->section == bfd_abs_section_ptr) |
e4c5f296 TG |
107 | ms_type = mst_abs; |
108 | else if (sym->section->flags & SEC_CODE) | |
109 | { | |
110 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
111 | ms_type = mst_text; | |
112 | else | |
113 | ms_type = mst_file_text; | |
114 | } | |
115 | else if (sym->section->flags & SEC_ALLOC) | |
116 | { | |
117 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
118 | { | |
119 | if (sym->section->flags & SEC_LOAD) | |
120 | ms_type = mst_data; | |
121 | else | |
122 | ms_type = mst_bss; | |
123 | } | |
124 | else if (sym->flags & BSF_LOCAL) | |
125 | { | |
126 | /* Not a special stabs-in-elf symbol, do regular | |
127 | symbol processing. */ | |
128 | if (sym->section->flags & SEC_LOAD) | |
129 | ms_type = mst_file_data; | |
130 | else | |
131 | ms_type = mst_file_bss; | |
132 | } | |
133 | else | |
134 | ms_type = mst_unknown; | |
135 | } | |
136 | else | |
137 | return; /* Skip this symbol. */ | |
138 | ||
8dddcb8f TT |
139 | reader.record_with_info (sym->name, symaddr, ms_type, |
140 | gdb_bfd_section_index (objfile->obfd, | |
141 | sym->section)); | |
e4c5f296 TG |
142 | } |
143 | } | |
144 | ||
a80b95ba | 145 | /* Build the minimal symbol table from SYMBOL_TABLE of length |
e4c5f296 | 146 | NUMBER_OF_SYMBOLS for OBJFILE. Registers OSO filenames found. */ |
f192ea96 | 147 | |
a80b95ba | 148 | static void |
8dddcb8f TT |
149 | macho_symtab_read (minimal_symbol_reader &reader, |
150 | struct objfile *objfile, | |
8b89a20a | 151 | long number_of_symbols, asymbol **symbol_table, |
2cc9b304 | 152 | std::vector<oso_el> *oso_vector_ptr) |
a80b95ba | 153 | { |
e4c5f296 | 154 | long i; |
e4c5f296 TG |
155 | const asymbol *file_so = NULL; |
156 | asymbol **oso_file = NULL; | |
b0d32fb6 | 157 | unsigned int nbr_syms = 0; |
a80b95ba | 158 | |
e4c5f296 TG |
159 | /* Current state while reading stabs. */ |
160 | enum | |
161 | { | |
162 | /* Not within an SO part. Only non-debugging symbols should be present, | |
163 | and will be added to the minimal symbols table. */ | |
164 | S_NO_SO, | |
bb00b29d | 165 | |
e4c5f296 TG |
166 | /* First SO read. Introduce an SO section, and may be followed by a second |
167 | SO. The SO section should contain onl debugging symbols. */ | |
168 | S_FIRST_SO, | |
a80b95ba | 169 | |
e4c5f296 TG |
170 | /* Second non-null SO found, just after the first one. Means that the first |
171 | is in fact a directory name. */ | |
172 | S_SECOND_SO, | |
a80b95ba | 173 | |
e4c5f296 TG |
174 | /* Non-null OSO found. Debugging info are DWARF in this OSO file. */ |
175 | S_DWARF_FILE, | |
3188d986 | 176 | |
e4c5f296 TG |
177 | S_STAB_FILE |
178 | } state = S_NO_SO; | |
a80b95ba | 179 | |
e4c5f296 TG |
180 | for (i = 0; i < number_of_symbols; i++) |
181 | { | |
182 | const asymbol *sym = symbol_table[i]; | |
183 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
a80b95ba | 184 | |
e4c5f296 TG |
185 | switch (state) |
186 | { | |
187 | case S_NO_SO: | |
188 | if (mach_o_sym->n_type == N_SO) | |
189 | { | |
190 | /* Start of object stab. */ | |
191 | if (sym->name == NULL || sym->name[0] == 0) | |
192 | { | |
193 | /* Unexpected empty N_SO. */ | |
b98664d3 | 194 | complaint (_("Unexpected empty N_SO stab")); |
e4c5f296 TG |
195 | } |
196 | else | |
197 | { | |
198 | file_so = sym; | |
e4c5f296 TG |
199 | state = S_FIRST_SO; |
200 | } | |
201 | } | |
202 | else if (sym->flags & BSF_DEBUGGING) | |
203 | { | |
13b8d0c6 TG |
204 | if (mach_o_sym->n_type == N_OPT) |
205 | { | |
206 | /* No complaint for OPT. */ | |
207 | break; | |
208 | } | |
209 | ||
e4c5f296 | 210 | /* Debugging symbols are not expected here. */ |
b98664d3 | 211 | complaint (_("%s: Unexpected debug stab outside SO markers"), |
4262abfb | 212 | objfile_name (objfile)); |
e4c5f296 TG |
213 | } |
214 | else | |
215 | { | |
216 | /* Non-debugging symbols go to the minimal symbol table. */ | |
8dddcb8f | 217 | macho_symtab_add_minsym (reader, objfile, sym); |
e4c5f296 TG |
218 | } |
219 | break; | |
a80b95ba | 220 | |
e4c5f296 TG |
221 | case S_FIRST_SO: |
222 | case S_SECOND_SO: | |
223 | if (mach_o_sym->n_type == N_SO) | |
224 | { | |
225 | if (sym->name == NULL || sym->name[0] == 0) | |
226 | { | |
227 | /* Unexpected empty N_SO. */ | |
b98664d3 | 228 | complaint (_("Empty SO section")); |
e4c5f296 TG |
229 | state = S_NO_SO; |
230 | } | |
231 | else if (state == S_FIRST_SO) | |
232 | { | |
233 | /* Second SO stab for the file name. */ | |
e4c5f296 TG |
234 | file_so = sym; |
235 | state = S_SECOND_SO; | |
236 | } | |
237 | else | |
b98664d3 | 238 | complaint (_("Three SO in a raw")); |
e4c5f296 TG |
239 | } |
240 | else if (mach_o_sym->n_type == N_OSO) | |
241 | { | |
242 | if (sym->name == NULL || sym->name[0] == 0) | |
243 | { | |
244 | /* Empty OSO. Means that this file was compiled with | |
245 | stabs. */ | |
246 | state = S_STAB_FILE; | |
247 | warning (_("stabs debugging not supported for %s"), | |
248 | file_so->name); | |
249 | } | |
250 | else | |
251 | { | |
252 | /* Non-empty OSO for a Dwarf file. */ | |
253 | oso_file = symbol_table + i; | |
254 | nbr_syms = 0; | |
255 | state = S_DWARF_FILE; | |
256 | } | |
257 | } | |
258 | else | |
b98664d3 | 259 | complaint (_("Unexpected stab after SO")); |
e4c5f296 | 260 | break; |
a80b95ba | 261 | |
e4c5f296 TG |
262 | case S_STAB_FILE: |
263 | case S_DWARF_FILE: | |
264 | if (mach_o_sym->n_type == N_SO) | |
265 | { | |
266 | if (sym->name == NULL || sym->name[0] == 0) | |
267 | { | |
268 | /* End of file. */ | |
269 | if (state == S_DWARF_FILE) | |
2cc9b304 TT |
270 | oso_vector_ptr->emplace_back (oso_file, symbol_table + i, |
271 | nbr_syms); | |
e4c5f296 TG |
272 | state = S_NO_SO; |
273 | } | |
274 | else | |
275 | { | |
b98664d3 | 276 | complaint (_("Missing nul SO")); |
e4c5f296 | 277 | file_so = sym; |
e4c5f296 TG |
278 | state = S_FIRST_SO; |
279 | } | |
280 | } | |
281 | else if (sym->flags & BSF_DEBUGGING) | |
282 | { | |
283 | if (state == S_STAB_FILE) | |
284 | { | |
285 | /* FIXME: to be implemented. */ | |
286 | } | |
287 | else | |
288 | { | |
289 | switch (mach_o_sym->n_type) | |
290 | { | |
291 | case N_FUN: | |
292 | if (sym->name == NULL || sym->name[0] == 0) | |
293 | break; | |
294 | /* Fall through. */ | |
295 | case N_STSYM: | |
296 | /* Interesting symbol. */ | |
297 | nbr_syms++; | |
298 | break; | |
299 | case N_ENSYM: | |
300 | case N_BNSYM: | |
301 | case N_GSYM: | |
302 | break; | |
303 | default: | |
b98664d3 | 304 | complaint (_("unhandled stab for dwarf OSO file")); |
e4c5f296 TG |
305 | break; |
306 | } | |
307 | } | |
308 | } | |
309 | else | |
b98664d3 | 310 | complaint (_("non-debugging symbol within SO")); |
e4c5f296 TG |
311 | break; |
312 | } | |
a80b95ba TG |
313 | } |
314 | ||
e4c5f296 | 315 | if (state != S_NO_SO) |
b98664d3 | 316 | complaint (_("missing nul SO")); |
a80b95ba TG |
317 | } |
318 | ||
319 | /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), | |
320 | returns the length of the archive name. | |
321 | Returns -1 otherwise. */ | |
f192ea96 | 322 | |
a80b95ba TG |
323 | static int |
324 | get_archive_prefix_len (const char *name) | |
325 | { | |
2e7bf1d7 | 326 | const char *lparen; |
a80b95ba TG |
327 | int name_len = strlen (name); |
328 | ||
329 | if (name_len == 0 || name[name_len - 1] != ')') | |
330 | return -1; | |
e4c5f296 | 331 | |
a80b95ba TG |
332 | lparen = strrchr (name, '('); |
333 | if (lparen == NULL || lparen == name) | |
334 | return -1; | |
335 | return lparen - name; | |
336 | } | |
337 | ||
2cc9b304 TT |
338 | /* Compare function to std::sort OSOs, so that members of a library |
339 | are gathered. */ | |
e4c5f296 | 340 | |
2cc9b304 TT |
341 | static bool |
342 | oso_el_compare_name (const oso_el &l, const oso_el &r) | |
f192ea96 | 343 | { |
2cc9b304 | 344 | return strcmp (l.name, r.name) < 0; |
f192ea96 TG |
345 | } |
346 | ||
e4c5f296 TG |
347 | /* Hash table entry structure for the stabs symbols in the main object file. |
348 | This is used to speed up lookup for symbols in the OSO. */ | |
38947cca | 349 | |
e4c5f296 TG |
350 | struct macho_sym_hash_entry |
351 | { | |
352 | struct bfd_hash_entry base; | |
353 | const asymbol *sym; | |
354 | }; | |
38947cca | 355 | |
e4c5f296 | 356 | /* Routine to create an entry in the hash table. */ |
38947cca | 357 | |
e4c5f296 TG |
358 | static struct bfd_hash_entry * |
359 | macho_sym_hash_newfunc (struct bfd_hash_entry *entry, | |
360 | struct bfd_hash_table *table, | |
361 | const char *string) | |
38947cca | 362 | { |
e4c5f296 TG |
363 | struct macho_sym_hash_entry *ret = (struct macho_sym_hash_entry *) entry; |
364 | ||
365 | /* Allocate the structure if it has not already been allocated by a | |
366 | subclass. */ | |
367 | if (ret == NULL) | |
368 | ret = (struct macho_sym_hash_entry *) bfd_hash_allocate (table, | |
369 | sizeof (* ret)); | |
370 | if (ret == NULL) | |
371 | return NULL; | |
38947cca | 372 | |
e4c5f296 TG |
373 | /* Call the allocation method of the superclass. */ |
374 | ret = (struct macho_sym_hash_entry *) | |
375 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string); | |
38947cca | 376 | |
e4c5f296 | 377 | if (ret) |
38947cca | 378 | { |
e4c5f296 TG |
379 | /* Initialize the local fields. */ |
380 | ret->sym = NULL; | |
381 | } | |
38947cca | 382 | |
e4c5f296 TG |
383 | return (struct bfd_hash_entry *) ret; |
384 | } | |
38947cca | 385 | |
e4c5f296 TG |
386 | /* Get the value of SYM from the minimal symtab of MAIN_OBJFILE. This is used |
387 | to get the value of global and common symbols. */ | |
38947cca | 388 | |
e4c5f296 TG |
389 | static CORE_ADDR |
390 | macho_resolve_oso_sym_with_minsym (struct objfile *main_objfile, asymbol *sym) | |
391 | { | |
392 | /* For common symbol and global symbols, use the min symtab. */ | |
3b7344d5 | 393 | struct bound_minimal_symbol msym; |
e4c5f296 TG |
394 | const char *name = sym->name; |
395 | ||
396 | if (name[0] == bfd_get_symbol_leading_char (main_objfile->obfd)) | |
397 | ++name; | |
398 | msym = lookup_minimal_symbol (name, NULL, main_objfile); | |
3b7344d5 | 399 | if (msym.minsym == NULL) |
e4c5f296 TG |
400 | { |
401 | warning (_("can't find symbol '%s' in minsymtab"), name); | |
402 | return 0; | |
38947cca | 403 | } |
e4c5f296 | 404 | else |
77e371c0 | 405 | return BMSYMBOL_VALUE_ADDRESS (msym); |
38947cca JB |
406 | } |
407 | ||
e4c5f296 | 408 | /* Add oso file OSO/ABFD as a symbol file. */ |
f192ea96 TG |
409 | |
410 | static void | |
192b62ce TT |
411 | macho_add_oso_symfile (oso_el *oso, const gdb_bfd_ref_ptr &abfd, |
412 | const char *name, | |
b15cc25c PA |
413 | struct objfile *main_objfile, |
414 | symfile_add_flags symfile_flags) | |
f192ea96 | 415 | { |
e4c5f296 | 416 | int storage; |
f192ea96 | 417 | int i; |
e4c5f296 TG |
418 | asymbol **symbol_table; |
419 | asymbol **symp; | |
420 | struct bfd_hash_table table; | |
421 | int nbr_sections; | |
422 | ||
423 | /* Per section flag to mark which section have been rebased. */ | |
424 | unsigned char *sections_rebased; | |
f192ea96 TG |
425 | |
426 | if (mach_o_debug_level > 0) | |
e4c5f296 TG |
427 | printf_unfiltered |
428 | (_("Loading debugging symbols from oso: %s\n"), oso->name); | |
2d33f7b8 | 429 | |
192b62ce | 430 | if (!bfd_check_format (abfd.get (), bfd_object)) |
f192ea96 TG |
431 | { |
432 | warning (_("`%s': can't read symbols: %s."), oso->name, | |
433 | bfd_errmsg (bfd_get_error ())); | |
f192ea96 TG |
434 | return; |
435 | } | |
436 | ||
192b62ce | 437 | if (abfd->my_archive == NULL && oso->mtime != bfd_get_mtime (abfd.get ())) |
e4c5f296 TG |
438 | { |
439 | warning (_("`%s': file time stamp mismatch."), oso->name); | |
e4c5f296 TG |
440 | return; |
441 | } | |
442 | ||
443 | if (!bfd_hash_table_init_n (&table, macho_sym_hash_newfunc, | |
444 | sizeof (struct macho_sym_hash_entry), | |
445 | oso->nbr_syms)) | |
446 | { | |
447 | warning (_("`%s': can't create hash table"), oso->name); | |
e4c5f296 TG |
448 | return; |
449 | } | |
450 | ||
192b62ce | 451 | bfd_set_cacheable (abfd.get (), 1); |
f18b4cab | 452 | |
e4c5f296 | 453 | /* Read symbols table. */ |
192b62ce | 454 | storage = bfd_get_symtab_upper_bound (abfd.get ()); |
e4c5f296 | 455 | symbol_table = (asymbol **) xmalloc (storage); |
192b62ce | 456 | bfd_canonicalize_symtab (abfd.get (), symbol_table); |
f192ea96 | 457 | |
e4c5f296 | 458 | /* Init section flags. */ |
192b62ce | 459 | nbr_sections = bfd_count_sections (abfd.get ()); |
e4c5f296 TG |
460 | sections_rebased = (unsigned char *) alloca (nbr_sections); |
461 | for (i = 0; i < nbr_sections; i++) | |
462 | sections_rebased[i] = 0; | |
f192ea96 | 463 | |
e4c5f296 TG |
464 | /* Put symbols for the OSO file in the hash table. */ |
465 | for (symp = oso->oso_sym; symp != oso->end_sym; symp++) | |
f192ea96 | 466 | { |
e4c5f296 TG |
467 | const asymbol *sym = *symp; |
468 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
f18b4cab | 469 | |
e4c5f296 | 470 | switch (mach_o_sym->n_type) |
f18b4cab | 471 | { |
e4c5f296 TG |
472 | case N_ENSYM: |
473 | case N_BNSYM: | |
474 | case N_GSYM: | |
475 | sym = NULL; | |
476 | break; | |
477 | case N_FUN: | |
478 | if (sym->name == NULL || sym->name[0] == 0) | |
479 | sym = NULL; | |
480 | break; | |
481 | case N_STSYM: | |
482 | break; | |
483 | default: | |
484 | sym = NULL; | |
485 | break; | |
486 | } | |
487 | if (sym != NULL) | |
488 | { | |
489 | struct macho_sym_hash_entry *ent; | |
490 | ||
491 | ent = (struct macho_sym_hash_entry *) | |
492 | bfd_hash_lookup (&table, sym->name, TRUE, FALSE); | |
493 | if (ent->sym != NULL) | |
b98664d3 | 494 | complaint (_("Duplicated symbol %s in symbol table"), sym->name); |
e4c5f296 | 495 | else |
f18b4cab | 496 | { |
e4c5f296 TG |
497 | if (mach_o_debug_level > 4) |
498 | { | |
499 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
500 | printf_unfiltered | |
501 | (_("Adding symbol %s (addr: %s)\n"), | |
502 | sym->name, paddress (arch, sym->value)); | |
503 | } | |
504 | ent->sym = sym; | |
f18b4cab | 505 | } |
f18b4cab | 506 | } |
e4c5f296 | 507 | } |
f18b4cab | 508 | |
e4c5f296 TG |
509 | /* Relocate symbols of the OSO. */ |
510 | for (i = 0; symbol_table[i]; i++) | |
511 | { | |
512 | asymbol *sym = symbol_table[i]; | |
513 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
514 | ||
515 | if (mach_o_sym->n_type & BFD_MACH_O_N_STAB) | |
516 | continue; | |
517 | if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF | |
518 | && sym->value != 0) | |
f18b4cab | 519 | { |
e4c5f296 TG |
520 | /* For common symbol use the min symtab and modify the OSO |
521 | symbol table. */ | |
522 | CORE_ADDR res; | |
523 | ||
524 | res = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
525 | if (res != 0) | |
526 | { | |
45dfa85a | 527 | sym->section = bfd_com_section_ptr; |
e4c5f296 TG |
528 | sym->value = res; |
529 | } | |
f18b4cab | 530 | } |
e4c5f296 TG |
531 | else if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT) |
532 | { | |
533 | /* Normal symbol. */ | |
534 | asection *sec = sym->section; | |
535 | bfd_mach_o_section *msec; | |
536 | unsigned int sec_type; | |
537 | ||
538 | /* Skip buggy ones. */ | |
539 | if (sec == NULL || sections_rebased[sec->index] != 0) | |
540 | continue; | |
541 | ||
542 | /* Only consider regular, non-debugging sections. */ | |
543 | msec = bfd_mach_o_get_mach_o_section (sec); | |
544 | sec_type = msec->flags & BFD_MACH_O_SECTION_TYPE_MASK; | |
545 | if ((sec_type == BFD_MACH_O_S_REGULAR | |
546 | || sec_type == BFD_MACH_O_S_ZEROFILL) | |
547 | && (msec->flags & BFD_MACH_O_S_ATTR_DEBUG) == 0) | |
548 | { | |
549 | CORE_ADDR addr = 0; | |
550 | ||
551 | if ((mach_o_sym->n_type & BFD_MACH_O_N_EXT) != 0) | |
552 | { | |
553 | /* Use the min symtab for global symbols. */ | |
554 | addr = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
555 | } | |
556 | else | |
557 | { | |
558 | struct macho_sym_hash_entry *ent; | |
559 | ||
560 | ent = (struct macho_sym_hash_entry *) | |
561 | bfd_hash_lookup (&table, sym->name, FALSE, FALSE); | |
562 | if (ent != NULL) | |
563 | addr = bfd_asymbol_value (ent->sym); | |
564 | } | |
f18b4cab | 565 | |
e4c5f296 TG |
566 | /* Adjust the section. */ |
567 | if (addr != 0) | |
568 | { | |
569 | CORE_ADDR res = addr - sym->value; | |
570 | ||
571 | if (mach_o_debug_level > 3) | |
572 | { | |
573 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
574 | printf_unfiltered | |
575 | (_("resolve sect %s with %s (set to %s)\n"), | |
576 | sec->name, sym->name, | |
577 | paddress (arch, res)); | |
578 | } | |
192b62ce | 579 | bfd_set_section_vma (abfd.get (), sec, res); |
e4c5f296 TG |
580 | sections_rebased[sec->index] = 1; |
581 | } | |
582 | } | |
583 | else | |
584 | { | |
585 | /* Mark the section as never rebased. */ | |
586 | sections_rebased[sec->index] = 2; | |
587 | } | |
588 | } | |
f192ea96 TG |
589 | } |
590 | ||
e4c5f296 | 591 | bfd_hash_table_free (&table); |
38947cca | 592 | |
bdfed3bc TG |
593 | /* We need to clear SYMFILE_MAINLINE to avoid interractive question |
594 | from symfile.c:symbol_file_add_with_addrs_or_offsets. */ | |
e4c5f296 | 595 | symbol_file_add_from_bfd |
192b62ce TT |
596 | (abfd.get (), name, symfile_flags & ~(SYMFILE_MAINLINE | SYMFILE_VERBOSE), |
597 | NULL, | |
bdfed3bc | 598 | main_objfile->flags & (OBJF_REORDERED | OBJF_SHARED |
63524580 JK |
599 | | OBJF_READNOW | OBJF_USERLOADED), |
600 | main_objfile); | |
f192ea96 TG |
601 | } |
602 | ||
8b89a20a JB |
603 | /* Read symbols from the vector of oso files. |
604 | ||
605 | Note that this function sorts OSO_VECTOR_PTR. */ | |
f192ea96 | 606 | |
a80b95ba | 607 | static void |
2cc9b304 | 608 | macho_symfile_read_all_oso (std::vector<oso_el> *oso_vector_ptr, |
8b89a20a | 609 | struct objfile *main_objfile, |
b15cc25c | 610 | symfile_add_flags symfile_flags) |
a80b95ba TG |
611 | { |
612 | int ix; | |
a80b95ba | 613 | oso_el *oso; |
a80b95ba | 614 | |
f192ea96 | 615 | /* Sort oso by name so that files from libraries are gathered. */ |
2cc9b304 TT |
616 | std::sort (oso_vector_ptr->begin (), oso_vector_ptr->end (), |
617 | oso_el_compare_name); | |
a80b95ba | 618 | |
2cc9b304 | 619 | for (ix = 0; ix < oso_vector_ptr->size (); ++ix) |
a80b95ba | 620 | { |
a80b95ba | 621 | int pfx_len; |
e4c5f296 | 622 | |
2cc9b304 TT |
623 | oso = &(*oso_vector_ptr)[ix]; |
624 | ||
a80b95ba TG |
625 | /* Check if this is a library name. */ |
626 | pfx_len = get_archive_prefix_len (oso->name); | |
627 | if (pfx_len > 0) | |
628 | { | |
f192ea96 TG |
629 | int last_ix; |
630 | oso_el *oso2; | |
631 | int ix2; | |
a80b95ba | 632 | |
af533a5f | 633 | std::string archive_name (oso->name, pfx_len); |
a4453b7e | 634 | |
f192ea96 | 635 | /* Compute number of oso for this archive. */ |
2cc9b304 | 636 | for (last_ix = ix; last_ix < oso_vector_ptr->size (); last_ix++) |
f192ea96 | 637 | { |
2cc9b304 | 638 | oso2 = &(*oso_vector_ptr)[last_ix]; |
af533a5f | 639 | if (strncmp (oso2->name, archive_name.c_str (), pfx_len) != 0) |
f192ea96 TG |
640 | break; |
641 | } | |
e4c5f296 | 642 | |
a80b95ba | 643 | /* Open the archive and check the format. */ |
192b62ce TT |
644 | gdb_bfd_ref_ptr archive_bfd (gdb_bfd_open (archive_name.c_str (), |
645 | gnutarget, -1)); | |
a80b95ba TG |
646 | if (archive_bfd == NULL) |
647 | { | |
648 | warning (_("Could not open OSO archive file \"%s\""), | |
af533a5f | 649 | archive_name.c_str ()); |
f192ea96 | 650 | ix = last_ix; |
a80b95ba TG |
651 | continue; |
652 | } | |
192b62ce | 653 | if (!bfd_check_format (archive_bfd.get (), bfd_archive)) |
a80b95ba TG |
654 | { |
655 | warning (_("OSO archive file \"%s\" not an archive."), | |
af533a5f | 656 | archive_name.c_str ()); |
f192ea96 | 657 | ix = last_ix; |
a80b95ba TG |
658 | continue; |
659 | } | |
a4453b7e | 660 | |
192b62ce TT |
661 | gdb_bfd_ref_ptr member_bfd |
662 | (gdb_bfd_openr_next_archived_file (archive_bfd.get (), NULL)); | |
e4c5f296 | 663 | |
a80b95ba TG |
664 | if (member_bfd == NULL) |
665 | { | |
666 | warning (_("Could not read archive members out of " | |
af533a5f | 667 | "OSO archive \"%s\""), archive_name.c_str ()); |
f192ea96 | 668 | ix = last_ix; |
a80b95ba TG |
669 | continue; |
670 | } | |
f192ea96 TG |
671 | |
672 | /* Load all oso in this library. */ | |
a80b95ba TG |
673 | while (member_bfd != NULL) |
674 | { | |
a80b95ba | 675 | const char *member_name = member_bfd->filename; |
f192ea96 TG |
676 | int member_len = strlen (member_name); |
677 | ||
ab7e10a0 | 678 | /* If this member is referenced, add it as a symfile. */ |
f192ea96 TG |
679 | for (ix2 = ix; ix2 < last_ix; ix2++) |
680 | { | |
2cc9b304 | 681 | oso2 = &(*oso_vector_ptr)[ix2]; |
f192ea96 TG |
682 | |
683 | if (oso2->name | |
684 | && strlen (oso2->name) == pfx_len + member_len + 2 | |
685 | && !memcmp (member_name, oso2->name + pfx_len + 1, | |
686 | member_len)) | |
687 | { | |
bdfed3bc | 688 | macho_add_oso_symfile (oso2, member_bfd, |
24ba069a | 689 | bfd_get_filename (member_bfd), |
bdfed3bc | 690 | main_objfile, symfile_flags); |
f192ea96 TG |
691 | oso2->name = NULL; |
692 | break; | |
693 | } | |
694 | } | |
695 | ||
192b62ce TT |
696 | member_bfd = gdb_bfd_openr_next_archived_file (archive_bfd.get (), |
697 | member_bfd.get ()); | |
a80b95ba | 698 | } |
f192ea96 TG |
699 | for (ix2 = ix; ix2 < last_ix; ix2++) |
700 | { | |
2cc9b304 | 701 | oso_el *oso2 = &(*oso_vector_ptr)[ix2]; |
f192ea96 TG |
702 | |
703 | if (oso2->name != NULL) | |
704 | warning (_("Could not find specified archive member " | |
705 | "for OSO name \"%s\""), oso->name); | |
706 | } | |
707 | ix = last_ix; | |
a80b95ba TG |
708 | } |
709 | else | |
710 | { | |
192b62ce TT |
711 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (oso->name, gnutarget, -1)); |
712 | if (abfd == NULL) | |
f192ea96 TG |
713 | warning (_("`%s': can't open to read symbols: %s."), oso->name, |
714 | bfd_errmsg (bfd_get_error ())); | |
715 | else | |
24ba069a JK |
716 | macho_add_oso_symfile (oso, abfd, oso->name, main_objfile, |
717 | symfile_flags); | |
f192ea96 TG |
718 | |
719 | ix++; | |
720 | } | |
721 | } | |
a80b95ba TG |
722 | } |
723 | ||
724 | /* DSYM (debug symbols) files contain the debug info of an executable. | |
725 | This is a separate file created by dsymutil(1) and is similar to debug | |
726 | link feature on ELF. | |
727 | DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the | |
728 | executable name and the executable base name to get the DSYM file name. */ | |
729 | #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" | |
730 | ||
24ba069a | 731 | /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it |
b577b6af | 732 | and return *FILENAMEP with its original filename. |
24ba069a JK |
733 | Return NULL if no valid dsym file is found (FILENAMEP is not used in |
734 | such case). */ | |
f192ea96 | 735 | |
192b62ce | 736 | static gdb_bfd_ref_ptr |
b577b6af | 737 | macho_check_dsym (struct objfile *objfile, std::string *filenamep) |
a80b95ba | 738 | { |
4262abfb | 739 | size_t name_len = strlen (objfile_name (objfile)); |
a80b95ba | 740 | size_t dsym_len = strlen (DSYM_SUFFIX); |
4262abfb | 741 | const char *base_name = lbasename (objfile_name (objfile)); |
a80b95ba | 742 | size_t base_len = strlen (base_name); |
224c3ddb | 743 | char *dsym_filename = (char *) alloca (name_len + dsym_len + base_len + 1); |
65ccb109 TG |
744 | bfd_mach_o_load_command *main_uuid; |
745 | bfd_mach_o_load_command *dsym_uuid; | |
a80b95ba | 746 | |
4262abfb | 747 | strcpy (dsym_filename, objfile_name (objfile)); |
a80b95ba TG |
748 | strcpy (dsym_filename + name_len, DSYM_SUFFIX); |
749 | strcpy (dsym_filename + name_len + dsym_len, base_name); | |
750 | ||
751 | if (access (dsym_filename, R_OK) != 0) | |
752 | return NULL; | |
753 | ||
65ccb109 TG |
754 | if (bfd_mach_o_lookup_command (objfile->obfd, |
755 | BFD_MACH_O_LC_UUID, &main_uuid) == 0) | |
a80b95ba | 756 | { |
4262abfb | 757 | warning (_("can't find UUID in %s"), objfile_name (objfile)); |
a80b95ba TG |
758 | return NULL; |
759 | } | |
192b62ce | 760 | gdb_bfd_ref_ptr dsym_bfd (gdb_bfd_openr (dsym_filename, gnutarget)); |
a80b95ba TG |
761 | if (dsym_bfd == NULL) |
762 | { | |
763 | warning (_("can't open dsym file %s"), dsym_filename); | |
a80b95ba TG |
764 | return NULL; |
765 | } | |
766 | ||
192b62ce | 767 | if (!bfd_check_format (dsym_bfd.get (), bfd_object)) |
a80b95ba | 768 | { |
a80b95ba | 769 | warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); |
a80b95ba TG |
770 | return NULL; |
771 | } | |
772 | ||
192b62ce | 773 | if (bfd_mach_o_lookup_command (dsym_bfd.get (), |
65ccb109 | 774 | BFD_MACH_O_LC_UUID, &dsym_uuid) == 0) |
a80b95ba TG |
775 | { |
776 | warning (_("can't find UUID in %s"), dsym_filename); | |
a80b95ba TG |
777 | return NULL; |
778 | } | |
65ccb109 TG |
779 | if (memcmp (dsym_uuid->command.uuid.uuid, main_uuid->command.uuid.uuid, |
780 | sizeof (main_uuid->command.uuid.uuid))) | |
a80b95ba | 781 | { |
4262abfb JK |
782 | warning (_("dsym file UUID doesn't match the one in %s"), |
783 | objfile_name (objfile)); | |
a80b95ba TG |
784 | return NULL; |
785 | } | |
b577b6af | 786 | *filenamep = std::string (dsym_filename); |
a80b95ba | 787 | return dsym_bfd; |
a80b95ba TG |
788 | } |
789 | ||
790 | static void | |
b15cc25c | 791 | macho_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags) |
a80b95ba TG |
792 | { |
793 | bfd *abfd = objfile->obfd; | |
a80b95ba | 794 | long storage_needed; |
2cc9b304 | 795 | std::vector<oso_el> oso_vector; |
a80b95ba | 796 | |
a80b95ba TG |
797 | /* Get symbols from the symbol table only if the file is an executable. |
798 | The symbol table of object files is not relocated and is expected to | |
799 | be in the executable. */ | |
cf1061c0 | 800 | if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
a80b95ba | 801 | { |
b577b6af | 802 | std::string dsym_filename; |
24ba069a | 803 | |
a80b95ba TG |
804 | /* Process the normal symbol table first. */ |
805 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); | |
806 | if (storage_needed < 0) | |
807 | error (_("Can't read symbols from %s: %s"), | |
808 | bfd_get_filename (objfile->obfd), | |
809 | bfd_errmsg (bfd_get_error ())); | |
810 | ||
811 | if (storage_needed > 0) | |
812 | { | |
a80b95ba TG |
813 | long symcount; |
814 | ||
2cc9b304 TT |
815 | gdb::def_vector<asymbol *> symbol_table (storage_needed |
816 | / sizeof (asymbol *)); | |
e4c5f296 | 817 | |
d25e8719 | 818 | minimal_symbol_reader reader (objfile); |
e4c5f296 | 819 | |
2cc9b304 TT |
820 | symcount = bfd_canonicalize_symtab (objfile->obfd, |
821 | symbol_table.data ()); | |
e4c5f296 | 822 | |
a80b95ba TG |
823 | if (symcount < 0) |
824 | error (_("Can't read symbols from %s: %s"), | |
825 | bfd_get_filename (objfile->obfd), | |
826 | bfd_errmsg (bfd_get_error ())); | |
e4c5f296 | 827 | |
2cc9b304 | 828 | macho_symtab_read (reader, objfile, symcount, symbol_table.data (), |
8dddcb8f | 829 | &oso_vector); |
e4c5f296 | 830 | |
d25e8719 | 831 | reader.install (); |
a80b95ba | 832 | } |
a80b95ba | 833 | |
cf1061c0 TG |
834 | /* Try to read .eh_frame / .debug_frame. */ |
835 | /* First, locate these sections. We ignore the result status | |
836 | as it only checks for debug info. */ | |
251d32d9 | 837 | dwarf2_has_info (objfile, NULL); |
cf1061c0 | 838 | dwarf2_build_frame_info (objfile); |
e4c5f296 | 839 | |
a80b95ba | 840 | /* Check for DSYM file. */ |
192b62ce | 841 | gdb_bfd_ref_ptr dsym_bfd (macho_check_dsym (objfile, &dsym_filename)); |
a80b95ba TG |
842 | if (dsym_bfd != NULL) |
843 | { | |
6414f3fd | 844 | struct bfd_section *asect, *dsect; |
a80b95ba TG |
845 | |
846 | if (mach_o_debug_level > 0) | |
847 | printf_unfiltered (_("dsym file found\n")); | |
848 | ||
6414f3fd TG |
849 | /* Set dsym section size. */ |
850 | for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections; | |
851 | asect && dsect; | |
852 | asect = asect->next, dsect = dsect->next) | |
853 | { | |
854 | if (strcmp (asect->name, dsect->name) != 0) | |
855 | break; | |
192b62ce | 856 | bfd_set_section_size (dsym_bfd.get (), dsect, |
6414f3fd TG |
857 | bfd_get_section_size (asect)); |
858 | } | |
859 | ||
2480cfa0 | 860 | /* Add the dsym file as a separate file. */ |
b577b6af | 861 | symbol_file_add_separate (dsym_bfd.get (), dsym_filename.c_str (), |
192b62ce | 862 | symfile_flags, objfile); |
e4c5f296 | 863 | |
cf1061c0 | 864 | /* Don't try to read dwarf2 from main file or shared libraries. */ |
2480cfa0 | 865 | return; |
a80b95ba TG |
866 | } |
867 | } | |
868 | ||
251d32d9 | 869 | if (dwarf2_has_info (objfile, NULL)) |
a80b95ba TG |
870 | { |
871 | /* DWARF 2 sections */ | |
f29dff0a | 872 | dwarf2_build_psymtabs (objfile); |
a80b95ba TG |
873 | } |
874 | ||
a80b95ba | 875 | /* Then the oso. */ |
2cc9b304 | 876 | if (!oso_vector.empty ()) |
8b89a20a | 877 | macho_symfile_read_all_oso (&oso_vector, objfile, symfile_flags); |
a80b95ba TG |
878 | } |
879 | ||
f18b4cab TG |
880 | static bfd_byte * |
881 | macho_symfile_relocate (struct objfile *objfile, asection *sectp, | |
882 | bfd_byte *buf) | |
883 | { | |
884 | bfd *abfd = objfile->obfd; | |
885 | ||
886 | /* We're only interested in sections with relocation | |
887 | information. */ | |
888 | if ((sectp->flags & SEC_RELOC) == 0) | |
889 | return NULL; | |
890 | ||
891 | if (mach_o_debug_level > 0) | |
892 | printf_unfiltered (_("Relocate section '%s' of %s\n"), | |
4262abfb | 893 | sectp->name, objfile_name (objfile)); |
f18b4cab | 894 | |
f18b4cab TG |
895 | return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); |
896 | } | |
897 | ||
a80b95ba TG |
898 | static void |
899 | macho_symfile_finish (struct objfile *objfile) | |
900 | { | |
901 | } | |
902 | ||
903 | static void | |
904 | macho_symfile_offsets (struct objfile *objfile, | |
37e136b1 | 905 | const section_addr_info &addrs) |
a80b95ba TG |
906 | { |
907 | unsigned int i; | |
a80b95ba TG |
908 | struct obj_section *osect; |
909 | ||
910 | /* Allocate section_offsets. */ | |
911 | objfile->num_sections = bfd_count_sections (objfile->obfd); | |
912 | objfile->section_offsets = (struct section_offsets *) | |
913 | obstack_alloc (&objfile->objfile_obstack, | |
914 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
915 | memset (objfile->section_offsets, 0, | |
916 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
917 | ||
918 | /* This code is run when we first add the objfile with | |
919 | symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are | |
920 | passed in. The place in symfile.c where the addrs are applied | |
921 | depends on the addrs having section names. But in the dyld code | |
922 | we build an anonymous array of addrs, so that code is a no-op. | |
923 | Because of that, we have to apply the addrs to the sections here. | |
924 | N.B. if an objfile slides after we've already created it, then it | |
925 | goes through objfile_relocate. */ | |
926 | ||
37e136b1 | 927 | for (i = 0; i < addrs.size (); i++) |
a80b95ba | 928 | { |
a80b95ba TG |
929 | ALL_OBJFILE_OSECTIONS (objfile, osect) |
930 | { | |
931 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
932 | ||
37e136b1 | 933 | if (bfd_sect_name == addrs[i].name) |
a80b95ba | 934 | { |
37e136b1 | 935 | obj_section_offset (osect) = addrs[i].addr; |
a80b95ba TG |
936 | break; |
937 | } | |
938 | } | |
939 | } | |
940 | ||
941 | objfile->sect_index_text = 0; | |
942 | ||
943 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
944 | { | |
945 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
65cf3563 | 946 | int sect_index = osect - objfile->sections;; |
e4c5f296 | 947 | |
61012eef | 948 | if (startswith (bfd_sect_name, "LC_SEGMENT.")) |
cf1061c0 TG |
949 | bfd_sect_name += 11; |
950 | if (strcmp (bfd_sect_name, "__TEXT") == 0 | |
951 | || strcmp (bfd_sect_name, "__TEXT.__text") == 0) | |
a80b95ba TG |
952 | objfile->sect_index_text = sect_index; |
953 | } | |
954 | } | |
955 | ||
00b5771c | 956 | static const struct sym_fns macho_sym_fns = { |
3e43a32a MS |
957 | macho_new_init, /* init anything gbl to entire symtab */ |
958 | macho_symfile_init, /* read initial info, setup for sym_read() */ | |
959 | macho_symfile_read, /* read a symbol file into symtab */ | |
b11896a5 | 960 | NULL, /* sym_read_psymbols */ |
3e43a32a MS |
961 | macho_symfile_finish, /* finished with file, cleanup */ |
962 | macho_symfile_offsets, /* xlate external to internal form */ | |
963 | default_symfile_segments, /* Get segment information from a file. */ | |
964 | NULL, | |
965 | macho_symfile_relocate, /* Relocate a debug section. */ | |
55aa24fb | 966 | NULL, /* sym_get_probes */ |
00b5771c | 967 | &psym_functions |
a80b95ba TG |
968 | }; |
969 | ||
970 | void | |
dd9aa048 | 971 | _initialize_machoread (void) |
a80b95ba | 972 | { |
c256e171 | 973 | add_symtab_fns (bfd_target_mach_o_flavour, &macho_sym_fns); |
a80b95ba | 974 | |
ccce17b0 YQ |
975 | add_setshow_zuinteger_cmd ("mach-o", class_obscure, |
976 | &mach_o_debug_level, | |
977 | _("Set if printing Mach-O symbols processing."), | |
978 | _("Show if printing Mach-O symbols processing."), | |
979 | NULL, NULL, NULL, | |
980 | &setdebuglist, &showdebuglist); | |
a80b95ba | 981 | } |