Commit | Line | Data |
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c906108c | 1 | /* GDB routines for manipulating objfiles. |
af5f3db6 | 2 | |
ecd75fc8 | 3 | Copyright (C) 1992-2014 Free Software Foundation, Inc. |
af5f3db6 | 4 | |
c906108c SS |
5 | Contributed by Cygnus Support, using pieces from other GDB modules. |
6 | ||
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | /* This file contains support routines for creating, manipulating, and | |
0df8b418 | 23 | destroying objfile structures. */ |
c906108c SS |
24 | |
25 | #include "defs.h" | |
26 | #include "bfd.h" /* Binary File Description */ | |
27 | #include "symtab.h" | |
28 | #include "symfile.h" | |
29 | #include "objfiles.h" | |
30 | #include "gdb-stabs.h" | |
31 | #include "target.h" | |
af5f3db6 | 32 | #include "bcache.h" |
9bdcbae7 DJ |
33 | #include "expression.h" |
34 | #include "parser-defs.h" | |
35 | ||
0d0e1a63 | 36 | #include "gdb_assert.h" |
c906108c | 37 | #include <sys/types.h> |
53ce3c39 | 38 | #include <sys/stat.h> |
c906108c | 39 | #include <fcntl.h> |
04ea0df1 | 40 | #include "gdb_obstack.h" |
0e9f083f | 41 | #include <string.h> |
2de7ced7 | 42 | #include "hashtab.h" |
c906108c | 43 | |
7a292a7a | 44 | #include "breakpoint.h" |
fe898f56 | 45 | #include "block.h" |
de4f826b | 46 | #include "dictionary.h" |
cb5d864f | 47 | #include "source.h" |
801e3a5b | 48 | #include "addrmap.h" |
5e2b427d | 49 | #include "arch-utils.h" |
30510692 | 50 | #include "exec.h" |
a845f5cb | 51 | #include "observer.h" |
6fbf07cd | 52 | #include "complaints.h" |
ccefe4c4 | 53 | #include "psymtab.h" |
0133421a | 54 | #include "solist.h" |
cbb099e8 | 55 | #include "gdb_bfd.h" |
afedecd3 | 56 | #include "btrace.h" |
7a292a7a | 57 | |
8e260fc0 TT |
58 | /* Keep a registry of per-objfile data-pointers required by other GDB |
59 | modules. */ | |
c906108c | 60 | |
6b81941e | 61 | DEFINE_REGISTRY (objfile, REGISTRY_ACCESS_FIELD) |
0d0e1a63 | 62 | |
c906108c | 63 | /* Externally visible variables that are owned by this module. |
0df8b418 | 64 | See declarations in objfile.h for more info. */ |
c906108c | 65 | |
6c95b8df PA |
66 | struct objfile_pspace_info |
67 | { | |
6c95b8df PA |
68 | struct obj_section **sections; |
69 | int num_sections; | |
607ece04 GB |
70 | |
71 | /* Nonzero if object files have been added since the section map | |
72 | was last updated. */ | |
73 | int new_objfiles_available; | |
74 | ||
75 | /* Nonzero if the section map MUST be updated before use. */ | |
76 | int section_map_dirty; | |
77 | ||
78 | /* Nonzero if section map updates should be inhibited if possible. */ | |
79 | int inhibit_updates; | |
6c95b8df PA |
80 | }; |
81 | ||
82 | /* Per-program-space data key. */ | |
83 | static const struct program_space_data *objfiles_pspace_data; | |
84 | ||
85 | static void | |
86 | objfiles_pspace_data_cleanup (struct program_space *pspace, void *arg) | |
87 | { | |
487ad57c | 88 | struct objfile_pspace_info *info = arg; |
6c95b8df | 89 | |
487ad57c YQ |
90 | xfree (info->sections); |
91 | xfree (info); | |
6c95b8df PA |
92 | } |
93 | ||
94 | /* Get the current svr4 data. If none is found yet, add it now. This | |
95 | function always returns a valid object. */ | |
96 | ||
97 | static struct objfile_pspace_info * | |
98 | get_objfile_pspace_data (struct program_space *pspace) | |
99 | { | |
100 | struct objfile_pspace_info *info; | |
101 | ||
102 | info = program_space_data (pspace, objfiles_pspace_data); | |
103 | if (info == NULL) | |
104 | { | |
105 | info = XZALLOC (struct objfile_pspace_info); | |
106 | set_program_space_data (pspace, objfiles_pspace_data, info); | |
107 | } | |
108 | ||
109 | return info; | |
110 | } | |
111 | ||
706e3705 TT |
112 | \f |
113 | ||
114 | /* Per-BFD data key. */ | |
115 | ||
116 | static const struct bfd_data *objfiles_bfd_data; | |
117 | ||
118 | /* Create the per-BFD storage object for OBJFILE. If ABFD is not | |
119 | NULL, and it already has a per-BFD storage object, use that. | |
120 | Otherwise, allocate a new per-BFD storage object. If ABFD is not | |
121 | NULL, the object is allocated on the BFD; otherwise it is allocated | |
122 | on OBJFILE's obstack. Note that it is not safe to call this | |
123 | multiple times for a given OBJFILE -- it can only be called when | |
124 | allocating or re-initializing OBJFILE. */ | |
125 | ||
126 | static struct objfile_per_bfd_storage * | |
127 | get_objfile_bfd_data (struct objfile *objfile, struct bfd *abfd) | |
128 | { | |
129 | struct objfile_per_bfd_storage *storage = NULL; | |
130 | ||
131 | if (abfd != NULL) | |
132 | storage = bfd_data (abfd, objfiles_bfd_data); | |
133 | ||
134 | if (storage == NULL) | |
135 | { | |
1da77581 TT |
136 | /* If the object requires gdb to do relocations, we simply fall |
137 | back to not sharing data across users. These cases are rare | |
138 | enough that this seems reasonable. */ | |
139 | if (abfd != NULL && !gdb_bfd_requires_relocations (abfd)) | |
706e3705 TT |
140 | { |
141 | storage = bfd_zalloc (abfd, sizeof (struct objfile_per_bfd_storage)); | |
142 | set_bfd_data (abfd, objfiles_bfd_data, storage); | |
143 | } | |
144 | else | |
145 | storage = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
146 | struct objfile_per_bfd_storage); | |
147 | ||
1da77581 TT |
148 | /* Look up the gdbarch associated with the BFD. */ |
149 | if (abfd != NULL) | |
150 | storage->gdbarch = gdbarch_from_bfd (abfd); | |
151 | ||
706e3705 TT |
152 | obstack_init (&storage->storage_obstack); |
153 | storage->filename_cache = bcache_xmalloc (NULL, NULL); | |
6532ff36 | 154 | storage->macro_cache = bcache_xmalloc (NULL, NULL); |
706e3705 TT |
155 | } |
156 | ||
157 | return storage; | |
158 | } | |
159 | ||
160 | /* Free STORAGE. */ | |
161 | ||
162 | static void | |
163 | free_objfile_per_bfd_storage (struct objfile_per_bfd_storage *storage) | |
164 | { | |
165 | bcache_xfree (storage->filename_cache); | |
6532ff36 | 166 | bcache_xfree (storage->macro_cache); |
84a1243b TT |
167 | if (storage->demangled_names_hash) |
168 | htab_delete (storage->demangled_names_hash); | |
706e3705 TT |
169 | obstack_free (&storage->storage_obstack, 0); |
170 | } | |
171 | ||
172 | /* A wrapper for free_objfile_per_bfd_storage that can be passed as a | |
173 | cleanup function to the BFD registry. */ | |
174 | ||
175 | static void | |
176 | objfile_bfd_data_free (struct bfd *unused, void *d) | |
177 | { | |
178 | free_objfile_per_bfd_storage (d); | |
179 | } | |
180 | ||
181 | /* See objfiles.h. */ | |
182 | ||
183 | void | |
184 | set_objfile_per_bfd (struct objfile *objfile) | |
185 | { | |
186 | objfile->per_bfd = get_objfile_bfd_data (objfile, objfile->obfd); | |
187 | } | |
188 | ||
189 | \f | |
190 | ||
96baa820 JM |
191 | /* Called via bfd_map_over_sections to build up the section table that |
192 | the objfile references. The objfile contains pointers to the start | |
193 | of the table (objfile->sections) and to the first location after | |
0df8b418 | 194 | the end of the table (objfile->sections_end). */ |
96baa820 | 195 | |
65cf3563 TT |
196 | static void |
197 | add_to_objfile_sections_full (struct bfd *abfd, struct bfd_section *asect, | |
198 | struct objfile *objfile, int force) | |
199 | { | |
200 | struct obj_section *section; | |
201 | ||
202 | if (!force) | |
203 | { | |
204 | flagword aflag; | |
205 | ||
206 | aflag = bfd_get_section_flags (abfd, asect); | |
207 | if (!(aflag & SEC_ALLOC)) | |
208 | return; | |
209 | } | |
210 | ||
211 | section = &objfile->sections[gdb_bfd_section_index (abfd, asect)]; | |
212 | section->objfile = objfile; | |
213 | section->the_bfd_section = asect; | |
214 | section->ovly_mapped = 0; | |
215 | } | |
216 | ||
c906108c | 217 | static void |
7be0c536 | 218 | add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
d82ea6a8 | 219 | void *objfilep) |
c906108c | 220 | { |
65cf3563 | 221 | add_to_objfile_sections_full (abfd, asect, objfilep, 0); |
c906108c SS |
222 | } |
223 | ||
224 | /* Builds a section table for OBJFILE. | |
96baa820 | 225 | |
65cf3563 TT |
226 | Note that the OFFSET and OVLY_MAPPED in each table entry are |
227 | initialized to zero. */ | |
c906108c | 228 | |
d82ea6a8 | 229 | void |
fba45db2 | 230 | build_objfile_section_table (struct objfile *objfile) |
c906108c | 231 | { |
65cf3563 TT |
232 | int count = gdb_bfd_count_sections (objfile->obfd); |
233 | ||
234 | objfile->sections = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
235 | count, | |
236 | struct obj_section); | |
237 | objfile->sections_end = (objfile->sections + count); | |
f1f6aadf PA |
238 | bfd_map_over_sections (objfile->obfd, |
239 | add_to_objfile_sections, (void *) objfile); | |
65cf3563 TT |
240 | |
241 | /* See gdb_bfd_section_index. */ | |
242 | add_to_objfile_sections_full (objfile->obfd, bfd_com_section_ptr, objfile, 1); | |
243 | add_to_objfile_sections_full (objfile->obfd, bfd_und_section_ptr, objfile, 1); | |
244 | add_to_objfile_sections_full (objfile->obfd, bfd_abs_section_ptr, objfile, 1); | |
245 | add_to_objfile_sections_full (objfile->obfd, bfd_ind_section_ptr, objfile, 1); | |
c906108c SS |
246 | } |
247 | ||
2df3850c JM |
248 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits |
249 | allocate a new objfile struct, fill it in as best we can, link it | |
250 | into the list of all known objfiles, and return a pointer to the | |
251 | new objfile struct. | |
c906108c | 252 | |
24ba069a JK |
253 | NAME should contain original non-canonicalized filename or other |
254 | identifier as entered by user. If there is no better source use | |
255 | bfd_get_filename (ABFD). NAME may be NULL only if ABFD is NULL. | |
256 | NAME content is copied into returned objfile. | |
257 | ||
2df3850c | 258 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
78a4a9b9 | 259 | requests for specific operations. Other bits like OBJF_SHARED are |
0df8b418 | 260 | simply copied through to the new objfile flags member. */ |
c906108c | 261 | |
eb9a305d DC |
262 | /* NOTE: carlton/2003-02-04: This function is called with args NULL, 0 |
263 | by jv-lang.c, to create an artificial objfile used to hold | |
264 | information about dynamically-loaded Java classes. Unfortunately, | |
265 | that branch of this function doesn't get tested very frequently, so | |
266 | it's prone to breakage. (E.g. at one time the name was set to NULL | |
267 | in that situation, which broke a loop over all names in the dynamic | |
268 | library loader.) If you change this function, please try to leave | |
269 | things in a consistent state even if abfd is NULL. */ | |
270 | ||
c906108c | 271 | struct objfile * |
24ba069a | 272 | allocate_objfile (bfd *abfd, const char *name, int flags) |
c906108c | 273 | { |
2f6e5d7e | 274 | struct objfile *objfile; |
04affae3 | 275 | char *expanded_name; |
c906108c | 276 | |
6a0fa043 | 277 | objfile = (struct objfile *) xzalloc (sizeof (struct objfile)); |
710e1a31 | 278 | objfile->psymbol_cache = psymbol_bcache_init (); |
2f6e5d7e TG |
279 | /* We could use obstack_specify_allocation here instead, but |
280 | gdb_obstack.h specifies the alloc/dealloc functions. */ | |
281 | obstack_init (&objfile->objfile_obstack); | |
282 | terminate_minimal_symbol_table (objfile); | |
c906108c | 283 | |
0d0e1a63 MK |
284 | objfile_alloc_data (objfile); |
285 | ||
24ba069a JK |
286 | if (name == NULL) |
287 | { | |
288 | gdb_assert (abfd == NULL); | |
40135bb1 | 289 | gdb_assert ((flags & OBJF_NOT_FILENAME) != 0); |
04affae3 | 290 | expanded_name = xstrdup ("<<anonymous objfile>>"); |
24ba069a | 291 | } |
04affae3 JK |
292 | else if ((flags & OBJF_NOT_FILENAME) != 0) |
293 | expanded_name = xstrdup (name); | |
294 | else | |
295 | expanded_name = gdb_abspath (name); | |
296 | objfile->original_name = obstack_copy0 (&objfile->objfile_obstack, | |
297 | expanded_name, | |
298 | strlen (expanded_name)); | |
299 | xfree (expanded_name); | |
300 | ||
301 | /* Update the per-objfile information that comes from the bfd, ensuring | |
302 | that any data that is reference is saved in the per-objfile data | |
303 | region. */ | |
24ba069a | 304 | |
d3e81981 DE |
305 | /* Update the per-objfile information that comes from the bfd, ensuring |
306 | that any data that is reference is saved in the per-objfile data | |
307 | region. */ | |
308 | ||
cbb099e8 | 309 | objfile->obfd = abfd; |
8ac244b4 | 310 | gdb_bfd_ref (abfd); |
c906108c SS |
311 | if (abfd != NULL) |
312 | { | |
c5aa993b | 313 | objfile->mtime = bfd_get_mtime (abfd); |
c906108c SS |
314 | |
315 | /* Build section table. */ | |
d82ea6a8 | 316 | build_objfile_section_table (objfile); |
c906108c SS |
317 | } |
318 | ||
706e3705 | 319 | objfile->per_bfd = get_objfile_bfd_data (objfile, abfd); |
6c95b8df PA |
320 | objfile->pspace = current_program_space; |
321 | ||
b8fbeb18 | 322 | /* Initialize the section indexes for this objfile, so that we can |
0df8b418 | 323 | later detect if they are used w/o being properly assigned to. */ |
b8fbeb18 | 324 | |
5c4e30ca DC |
325 | objfile->sect_index_text = -1; |
326 | objfile->sect_index_data = -1; | |
327 | objfile->sect_index_bss = -1; | |
328 | objfile->sect_index_rodata = -1; | |
329 | ||
0df8b418 | 330 | /* Add this file onto the tail of the linked list of other such files. */ |
c906108c | 331 | |
c5aa993b | 332 | objfile->next = NULL; |
c906108c SS |
333 | if (object_files == NULL) |
334 | object_files = objfile; | |
335 | else | |
336 | { | |
2f6e5d7e TG |
337 | struct objfile *last_one; |
338 | ||
c906108c | 339 | for (last_one = object_files; |
c5aa993b JM |
340 | last_one->next; |
341 | last_one = last_one->next); | |
342 | last_one->next = objfile; | |
c906108c SS |
343 | } |
344 | ||
0df8b418 | 345 | /* Save passed in flag bits. */ |
2df3850c | 346 | objfile->flags |= flags; |
c906108c | 347 | |
6c95b8df | 348 | /* Rebuild section map next time we need it. */ |
607ece04 | 349 | get_objfile_pspace_data (objfile->pspace)->new_objfiles_available = 1; |
bb272892 | 350 | |
6c95b8df | 351 | return objfile; |
c906108c SS |
352 | } |
353 | ||
5e2b427d UW |
354 | /* Retrieve the gdbarch associated with OBJFILE. */ |
355 | struct gdbarch * | |
356 | get_objfile_arch (struct objfile *objfile) | |
357 | { | |
df6d5441 | 358 | return objfile->per_bfd->gdbarch; |
5e2b427d UW |
359 | } |
360 | ||
abd0a5fa JK |
361 | /* If there is a valid and known entry point, function fills *ENTRY_P with it |
362 | and returns non-zero; otherwise it returns zero. */ | |
9ab9195f | 363 | |
abd0a5fa JK |
364 | int |
365 | entry_point_address_query (CORE_ADDR *entry_p) | |
9ab9195f | 366 | { |
abd0a5fa | 367 | if (symfile_objfile == NULL || !symfile_objfile->ei.entry_point_p) |
3612b192 DJ |
368 | return 0; |
369 | ||
8c2b9656 | 370 | *entry_p = symfile_objfile->ei.entry_point; |
3612b192 | 371 | |
abd0a5fa JK |
372 | return 1; |
373 | } | |
374 | ||
375 | /* Get current entry point address. Call error if it is not known. */ | |
376 | ||
377 | CORE_ADDR | |
378 | entry_point_address (void) | |
379 | { | |
380 | CORE_ADDR retval; | |
381 | ||
382 | if (!entry_point_address_query (&retval)) | |
383 | error (_("Entry point address is not known.")); | |
384 | ||
385 | return retval; | |
9ab9195f | 386 | } |
15831452 | 387 | |
15d123c9 TG |
388 | /* Iterator on PARENT and every separate debug objfile of PARENT. |
389 | The usage pattern is: | |
390 | for (objfile = parent; | |
391 | objfile; | |
392 | objfile = objfile_separate_debug_iterate (parent, objfile)) | |
393 | ... | |
394 | */ | |
395 | ||
396 | struct objfile * | |
397 | objfile_separate_debug_iterate (const struct objfile *parent, | |
398 | const struct objfile *objfile) | |
399 | { | |
400 | struct objfile *res; | |
401 | ||
399f313b | 402 | /* If any, return the first child. */ |
15d123c9 TG |
403 | res = objfile->separate_debug_objfile; |
404 | if (res) | |
405 | return res; | |
406 | ||
15d123c9 TG |
407 | /* Common case where there is no separate debug objfile. */ |
408 | if (objfile == parent) | |
409 | return NULL; | |
410 | ||
399f313b TG |
411 | /* Return the brother if any. Note that we don't iterate on brothers of |
412 | the parents. */ | |
413 | res = objfile->separate_debug_objfile_link; | |
414 | if (res) | |
415 | return res; | |
416 | ||
15d123c9 TG |
417 | for (res = objfile->separate_debug_objfile_backlink; |
418 | res != parent; | |
419 | res = res->separate_debug_objfile_backlink) | |
420 | { | |
421 | gdb_assert (res != NULL); | |
422 | if (res->separate_debug_objfile_link) | |
423 | return res->separate_debug_objfile_link; | |
424 | } | |
425 | return NULL; | |
426 | } | |
15831452 | 427 | |
5b5d99cf JB |
428 | /* Put one object file before a specified on in the global list. |
429 | This can be used to make sure an object file is destroyed before | |
0df8b418 | 430 | another when using ALL_OBJFILES_SAFE to free all objfiles. */ |
5b5d99cf JB |
431 | void |
432 | put_objfile_before (struct objfile *objfile, struct objfile *before_this) | |
433 | { | |
434 | struct objfile **objp; | |
435 | ||
436 | unlink_objfile (objfile); | |
437 | ||
438 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
439 | { | |
440 | if (*objp == before_this) | |
441 | { | |
442 | objfile->next = *objp; | |
443 | *objp = objfile; | |
444 | return; | |
445 | } | |
446 | } | |
447 | ||
448 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 449 | _("put_objfile_before: before objfile not in list")); |
5b5d99cf JB |
450 | } |
451 | ||
c906108c SS |
452 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the |
453 | list. | |
454 | ||
455 | It is not a bug, or error, to call this function if OBJFILE is not known | |
456 | to be in the current list. This is done in the case of mapped objfiles, | |
457 | for example, just to ensure that the mapped objfile doesn't appear twice | |
458 | in the list. Since the list is threaded, linking in a mapped objfile | |
459 | twice would create a circular list. | |
460 | ||
461 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
462 | unlinking it, just to ensure that we have completely severed any linkages | |
0df8b418 | 463 | between the OBJFILE and the list. */ |
c906108c SS |
464 | |
465 | void | |
fba45db2 | 466 | unlink_objfile (struct objfile *objfile) |
c906108c | 467 | { |
c5aa993b | 468 | struct objfile **objpp; |
c906108c | 469 | |
c5aa993b | 470 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
c906108c | 471 | { |
c5aa993b | 472 | if (*objpp == objfile) |
c906108c | 473 | { |
c5aa993b JM |
474 | *objpp = (*objpp)->next; |
475 | objfile->next = NULL; | |
07cd4b97 | 476 | return; |
c906108c SS |
477 | } |
478 | } | |
07cd4b97 | 479 | |
8e65ff28 | 480 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 481 | _("unlink_objfile: objfile already unlinked")); |
c906108c SS |
482 | } |
483 | ||
15d123c9 TG |
484 | /* Add OBJFILE as a separate debug objfile of PARENT. */ |
485 | ||
486 | void | |
487 | add_separate_debug_objfile (struct objfile *objfile, struct objfile *parent) | |
488 | { | |
489 | gdb_assert (objfile && parent); | |
490 | ||
491 | /* Must not be already in a list. */ | |
492 | gdb_assert (objfile->separate_debug_objfile_backlink == NULL); | |
493 | gdb_assert (objfile->separate_debug_objfile_link == NULL); | |
8a92335b JK |
494 | gdb_assert (objfile->separate_debug_objfile == NULL); |
495 | gdb_assert (parent->separate_debug_objfile_backlink == NULL); | |
496 | gdb_assert (parent->separate_debug_objfile_link == NULL); | |
15d123c9 TG |
497 | |
498 | objfile->separate_debug_objfile_backlink = parent; | |
499 | objfile->separate_debug_objfile_link = parent->separate_debug_objfile; | |
500 | parent->separate_debug_objfile = objfile; | |
501 | ||
502 | /* Put the separate debug object before the normal one, this is so that | |
0df8b418 | 503 | usage of the ALL_OBJFILES_SAFE macro will stay safe. */ |
15d123c9 TG |
504 | put_objfile_before (objfile, parent); |
505 | } | |
506 | ||
507 | /* Free all separate debug objfile of OBJFILE, but don't free OBJFILE | |
508 | itself. */ | |
509 | ||
510 | void | |
511 | free_objfile_separate_debug (struct objfile *objfile) | |
512 | { | |
513 | struct objfile *child; | |
514 | ||
515 | for (child = objfile->separate_debug_objfile; child;) | |
516 | { | |
517 | struct objfile *next_child = child->separate_debug_objfile_link; | |
518 | free_objfile (child); | |
519 | child = next_child; | |
520 | } | |
521 | } | |
c906108c | 522 | |
7580e917 | 523 | /* Destroy an objfile and all the symtabs and psymtabs under it. */ |
c906108c SS |
524 | |
525 | void | |
fba45db2 | 526 | free_objfile (struct objfile *objfile) |
c906108c | 527 | { |
63644780 NB |
528 | /* First notify observers that this objfile is about to be freed. */ |
529 | observer_notify_free_objfile (objfile); | |
530 | ||
15d123c9 TG |
531 | /* Free all separate debug objfiles. */ |
532 | free_objfile_separate_debug (objfile); | |
533 | ||
5b5d99cf JB |
534 | if (objfile->separate_debug_objfile_backlink) |
535 | { | |
536 | /* We freed the separate debug file, make sure the base objfile | |
537 | doesn't reference it. */ | |
15d123c9 TG |
538 | struct objfile *child; |
539 | ||
540 | child = objfile->separate_debug_objfile_backlink->separate_debug_objfile; | |
541 | ||
542 | if (child == objfile) | |
543 | { | |
544 | /* OBJFILE is the first child. */ | |
545 | objfile->separate_debug_objfile_backlink->separate_debug_objfile = | |
546 | objfile->separate_debug_objfile_link; | |
547 | } | |
548 | else | |
549 | { | |
550 | /* Find OBJFILE in the list. */ | |
551 | while (1) | |
552 | { | |
553 | if (child->separate_debug_objfile_link == objfile) | |
554 | { | |
555 | child->separate_debug_objfile_link = | |
556 | objfile->separate_debug_objfile_link; | |
557 | break; | |
558 | } | |
559 | child = child->separate_debug_objfile_link; | |
560 | gdb_assert (child); | |
561 | } | |
562 | } | |
5b5d99cf JB |
563 | } |
564 | ||
ae5a43e0 DJ |
565 | /* Remove any references to this objfile in the global value |
566 | lists. */ | |
567 | preserve_values (objfile); | |
568 | ||
9f743ef6 JK |
569 | /* It still may reference data modules have associated with the objfile and |
570 | the symbol file data. */ | |
571 | forget_cached_source_info_for_objfile (objfile); | |
572 | ||
2f202fde | 573 | breakpoint_free_objfile (objfile); |
afedecd3 | 574 | btrace_free_objfile (objfile); |
2f202fde | 575 | |
c906108c SS |
576 | /* First do any symbol file specific actions required when we are |
577 | finished with a particular symbol file. Note that if the objfile | |
578 | is using reusable symbol information (via mmalloc) then each of | |
579 | these routines is responsible for doing the correct thing, either | |
580 | freeing things which are valid only during this particular gdb | |
0df8b418 | 581 | execution, or leaving them to be reused during the next one. */ |
c906108c | 582 | |
c5aa993b | 583 | if (objfile->sf != NULL) |
c906108c | 584 | { |
c5aa993b | 585 | (*objfile->sf->sym_finish) (objfile); |
c906108c SS |
586 | } |
587 | ||
9f743ef6 JK |
588 | /* Discard any data modules have associated with the objfile. The function |
589 | still may reference objfile->obfd. */ | |
c5bc3a77 DJ |
590 | objfile_free_data (objfile); |
591 | ||
706e3705 TT |
592 | if (objfile->obfd) |
593 | gdb_bfd_unref (objfile->obfd); | |
594 | else | |
595 | free_objfile_per_bfd_storage (objfile->per_bfd); | |
c906108c | 596 | |
0df8b418 | 597 | /* Remove it from the chain of all objfiles. */ |
c906108c SS |
598 | |
599 | unlink_objfile (objfile); | |
600 | ||
adb7f338 JK |
601 | if (objfile == symfile_objfile) |
602 | symfile_objfile = NULL; | |
c906108c | 603 | |
c906108c SS |
604 | /* Before the symbol table code was redone to make it easier to |
605 | selectively load and remove information particular to a specific | |
606 | linkage unit, gdb used to do these things whenever the monolithic | |
607 | symbol table was blown away. How much still needs to be done | |
608 | is unknown, but we play it safe for now and keep each action until | |
0df8b418 | 609 | it is shown to be no longer needed. */ |
c5aa993b | 610 | |
cb5d864f FF |
611 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
612 | for example), so we need to call this here. */ | |
c906108c SS |
613 | clear_pc_function_cache (); |
614 | ||
9bdcbae7 DJ |
615 | /* Clear globals which might have pointed into a removed objfile. |
616 | FIXME: It's not clear which of these are supposed to persist | |
617 | between expressions and which ought to be reset each time. */ | |
618 | expression_context_block = NULL; | |
619 | innermost_block = NULL; | |
620 | ||
cb5d864f | 621 | /* Check to see if the current_source_symtab belongs to this objfile, |
0df8b418 | 622 | and if so, call clear_current_source_symtab_and_line. */ |
cb5d864f FF |
623 | |
624 | { | |
625 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
cb5d864f | 626 | |
00174a86 TT |
627 | if (cursal.symtab && cursal.symtab->objfile == objfile) |
628 | clear_current_source_symtab_and_line (); | |
cb5d864f FF |
629 | } |
630 | ||
78a4a9b9 | 631 | if (objfile->global_psymbols.list) |
2dc74dc1 | 632 | xfree (objfile->global_psymbols.list); |
78a4a9b9 | 633 | if (objfile->static_psymbols.list) |
2dc74dc1 | 634 | xfree (objfile->static_psymbols.list); |
0df8b418 | 635 | /* Free the obstacks for non-reusable objfiles. */ |
710e1a31 | 636 | psymbol_bcache_free (objfile->psymbol_cache); |
b99607ea | 637 | obstack_free (&objfile->objfile_obstack, 0); |
6c95b8df PA |
638 | |
639 | /* Rebuild section map next time we need it. */ | |
607ece04 | 640 | get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1; |
6c95b8df | 641 | |
020f7036 | 642 | /* The last thing we do is free the objfile struct itself. */ |
2dc74dc1 | 643 | xfree (objfile); |
c906108c SS |
644 | } |
645 | ||
74b7792f AC |
646 | static void |
647 | do_free_objfile_cleanup (void *obj) | |
648 | { | |
649 | free_objfile (obj); | |
650 | } | |
651 | ||
652 | struct cleanup * | |
653 | make_cleanup_free_objfile (struct objfile *obj) | |
654 | { | |
655 | return make_cleanup (do_free_objfile_cleanup, obj); | |
656 | } | |
c906108c SS |
657 | |
658 | /* Free all the object files at once and clean up their users. */ | |
659 | ||
660 | void | |
fba45db2 | 661 | free_all_objfiles (void) |
c906108c SS |
662 | { |
663 | struct objfile *objfile, *temp; | |
0133421a JK |
664 | struct so_list *so; |
665 | ||
666 | /* Any objfile referencewould become stale. */ | |
667 | for (so = master_so_list (); so; so = so->next) | |
668 | gdb_assert (so->objfile == NULL); | |
c906108c SS |
669 | |
670 | ALL_OBJFILES_SAFE (objfile, temp) | |
c5aa993b JM |
671 | { |
672 | free_objfile (objfile); | |
673 | } | |
c1e56572 | 674 | clear_symtab_users (0); |
c906108c SS |
675 | } |
676 | \f | |
34eaf542 TT |
677 | /* A helper function for objfile_relocate1 that relocates a single |
678 | symbol. */ | |
679 | ||
680 | static void | |
681 | relocate_one_symbol (struct symbol *sym, struct objfile *objfile, | |
682 | struct section_offsets *delta) | |
683 | { | |
684 | fixup_symbol_section (sym, objfile); | |
685 | ||
686 | /* The RS6000 code from which this was taken skipped | |
687 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. | |
688 | But I'm leaving out that test, on the theory that | |
689 | they can't possibly pass the tests below. */ | |
690 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
691 | || SYMBOL_CLASS (sym) == LOC_STATIC) | |
692 | && SYMBOL_SECTION (sym) >= 0) | |
693 | { | |
694 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
695 | } | |
696 | } | |
697 | ||
c906108c | 698 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS |
b260e109 JK |
699 | entries in new_offsets. SEPARATE_DEBUG_OBJFILE is not touched here. |
700 | Return non-zero iff any change happened. */ | |
567995e1 | 701 | |
b260e109 | 702 | static int |
5cc80db3 | 703 | objfile_relocate1 (struct objfile *objfile, |
3189cb12 | 704 | const struct section_offsets *new_offsets) |
c906108c | 705 | { |
30510692 | 706 | struct obj_section *s; |
d4f3574e | 707 | struct section_offsets *delta = |
a39a16c4 MM |
708 | ((struct section_offsets *) |
709 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
c906108c | 710 | |
5cc80db3 MS |
711 | int i; |
712 | int something_changed = 0; | |
713 | ||
714 | for (i = 0; i < objfile->num_sections; ++i) | |
715 | { | |
716 | delta->offsets[i] = | |
717 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); | |
718 | if (ANOFFSET (delta, i) != 0) | |
719 | something_changed = 1; | |
720 | } | |
721 | if (!something_changed) | |
722 | return 0; | |
c906108c SS |
723 | |
724 | /* OK, get all the symtabs. */ | |
725 | { | |
726 | struct symtab *s; | |
727 | ||
728 | ALL_OBJFILE_SYMTABS (objfile, s) | |
c5aa993b JM |
729 | { |
730 | struct linetable *l; | |
731 | struct blockvector *bv; | |
732 | int i; | |
733 | ||
734 | /* First the line table. */ | |
735 | l = LINETABLE (s); | |
736 | if (l) | |
737 | { | |
738 | for (i = 0; i < l->nitems; ++i) | |
739 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
740 | } | |
c906108c | 741 | |
c5aa993b JM |
742 | /* Don't relocate a shared blockvector more than once. */ |
743 | if (!s->primary) | |
744 | continue; | |
c906108c | 745 | |
c5aa993b | 746 | bv = BLOCKVECTOR (s); |
b101f7a1 UW |
747 | if (BLOCKVECTOR_MAP (bv)) |
748 | addrmap_relocate (BLOCKVECTOR_MAP (bv), | |
749 | ANOFFSET (delta, s->block_line_section)); | |
750 | ||
c5aa993b JM |
751 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) |
752 | { | |
753 | struct block *b; | |
e88c90f2 | 754 | struct symbol *sym; |
de4f826b | 755 | struct dict_iterator iter; |
c5aa993b JM |
756 | |
757 | b = BLOCKVECTOR_BLOCK (bv, i); | |
758 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
759 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
760 | ||
8157b174 TT |
761 | /* We only want to iterate over the local symbols, not any |
762 | symbols in included symtabs. */ | |
763 | ALL_DICT_SYMBOLS (BLOCK_DICT (b), iter, sym) | |
c5aa993b | 764 | { |
34eaf542 | 765 | relocate_one_symbol (sym, objfile, delta); |
c5aa993b JM |
766 | } |
767 | } | |
768 | } | |
c906108c SS |
769 | } |
770 | ||
34eaf542 TT |
771 | /* Relocate isolated symbols. */ |
772 | { | |
773 | struct symbol *iter; | |
774 | ||
775 | for (iter = objfile->template_symbols; iter; iter = iter->hash_next) | |
776 | relocate_one_symbol (iter, objfile, delta); | |
777 | } | |
778 | ||
9b14d7aa JK |
779 | if (objfile->psymtabs_addrmap) |
780 | addrmap_relocate (objfile->psymtabs_addrmap, | |
781 | ANOFFSET (delta, SECT_OFF_TEXT (objfile))); | |
782 | ||
ccefe4c4 TT |
783 | if (objfile->sf) |
784 | objfile->sf->qf->relocate (objfile, new_offsets, delta); | |
c906108c SS |
785 | |
786 | { | |
787 | struct minimal_symbol *msym; | |
5cc80db3 | 788 | |
c906108c SS |
789 | ALL_OBJFILE_MSYMBOLS (objfile, msym) |
790 | if (SYMBOL_SECTION (msym) >= 0) | |
c5aa993b | 791 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); |
c906108c SS |
792 | } |
793 | /* Relocating different sections by different amounts may cause the symbols | |
794 | to be out of order. */ | |
795 | msymbols_sort (objfile); | |
796 | ||
abd0a5fa | 797 | if (objfile->ei.entry_point_p) |
36b0c0e0 PS |
798 | { |
799 | /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT | |
800 | only as a fallback. */ | |
801 | struct obj_section *s; | |
802 | s = find_pc_section (objfile->ei.entry_point); | |
803 | if (s) | |
65cf3563 TT |
804 | { |
805 | int idx = gdb_bfd_section_index (objfile->obfd, s->the_bfd_section); | |
806 | ||
807 | objfile->ei.entry_point += ANOFFSET (delta, idx); | |
808 | } | |
36b0c0e0 PS |
809 | else |
810 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
811 | } | |
812 | ||
f1f2b5f4 PA |
813 | { |
814 | int i; | |
5cc80db3 | 815 | |
f1f2b5f4 PA |
816 | for (i = 0; i < objfile->num_sections; ++i) |
817 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); | |
818 | } | |
819 | ||
820 | /* Rebuild section map next time we need it. */ | |
607ece04 | 821 | get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1; |
f1f2b5f4 | 822 | |
30510692 DJ |
823 | /* Update the table in exec_ops, used to read memory. */ |
824 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
825 | { | |
65cf3563 | 826 | int idx = s - objfile->sections; |
30510692 DJ |
827 | |
828 | exec_set_section_address (bfd_get_filename (objfile->obfd), idx, | |
f1f6aadf | 829 | obj_section_addr (s)); |
30510692 | 830 | } |
b260e109 | 831 | |
55aa24fb SDJ |
832 | /* Relocating probes. */ |
833 | if (objfile->sf && objfile->sf->sym_probe_fns) | |
834 | objfile->sf->sym_probe_fns->sym_relocate_probe (objfile, | |
835 | new_offsets, delta); | |
836 | ||
b260e109 JK |
837 | /* Data changed. */ |
838 | return 1; | |
567995e1 JK |
839 | } |
840 | ||
841 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
842 | entries in new_offsets. Process also OBJFILE's SEPARATE_DEBUG_OBJFILEs. | |
843 | ||
844 | The number and ordering of sections does differ between the two objfiles. | |
845 | Only their names match. Also the file offsets will differ (objfile being | |
846 | possibly prelinked but separate_debug_objfile is probably not prelinked) but | |
847 | the in-memory absolute address as specified by NEW_OFFSETS must match both | |
848 | files. */ | |
849 | ||
850 | void | |
3189cb12 DE |
851 | objfile_relocate (struct objfile *objfile, |
852 | const struct section_offsets *new_offsets) | |
567995e1 JK |
853 | { |
854 | struct objfile *debug_objfile; | |
b260e109 | 855 | int changed = 0; |
567995e1 | 856 | |
b260e109 | 857 | changed |= objfile_relocate1 (objfile, new_offsets); |
567995e1 JK |
858 | |
859 | for (debug_objfile = objfile->separate_debug_objfile; | |
860 | debug_objfile; | |
861 | debug_objfile = objfile_separate_debug_iterate (objfile, debug_objfile)) | |
862 | { | |
863 | struct section_addr_info *objfile_addrs; | |
864 | struct section_offsets *new_debug_offsets; | |
567995e1 JK |
865 | struct cleanup *my_cleanups; |
866 | ||
867 | objfile_addrs = build_section_addr_info_from_objfile (objfile); | |
868 | my_cleanups = make_cleanup (xfree, objfile_addrs); | |
869 | ||
870 | /* Here OBJFILE_ADDRS contain the correct absolute addresses, the | |
871 | relative ones must be already created according to debug_objfile. */ | |
872 | ||
873 | addr_info_make_relative (objfile_addrs, debug_objfile->obfd); | |
874 | ||
875 | gdb_assert (debug_objfile->num_sections | |
d445b2f6 | 876 | == gdb_bfd_count_sections (debug_objfile->obfd)); |
4fc06681 MS |
877 | new_debug_offsets = |
878 | xmalloc (SIZEOF_N_SECTION_OFFSETS (debug_objfile->num_sections)); | |
567995e1 JK |
879 | make_cleanup (xfree, new_debug_offsets); |
880 | relative_addr_info_to_section_offsets (new_debug_offsets, | |
881 | debug_objfile->num_sections, | |
882 | objfile_addrs); | |
883 | ||
b260e109 | 884 | changed |= objfile_relocate1 (debug_objfile, new_debug_offsets); |
567995e1 JK |
885 | |
886 | do_cleanups (my_cleanups); | |
887 | } | |
30510692 | 888 | |
0df8b418 | 889 | /* Relocate breakpoints as necessary, after things are relocated. */ |
b260e109 JK |
890 | if (changed) |
891 | breakpoint_re_set (); | |
c906108c | 892 | } |
4141a416 JB |
893 | |
894 | /* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is | |
895 | not touched here. | |
896 | Return non-zero iff any change happened. */ | |
897 | ||
898 | static int | |
899 | objfile_rebase1 (struct objfile *objfile, CORE_ADDR slide) | |
900 | { | |
901 | struct section_offsets *new_offsets = | |
902 | ((struct section_offsets *) | |
903 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
904 | int i; | |
905 | ||
906 | for (i = 0; i < objfile->num_sections; ++i) | |
907 | new_offsets->offsets[i] = slide; | |
908 | ||
909 | return objfile_relocate1 (objfile, new_offsets); | |
910 | } | |
911 | ||
912 | /* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's | |
913 | SEPARATE_DEBUG_OBJFILEs. */ | |
914 | ||
915 | void | |
916 | objfile_rebase (struct objfile *objfile, CORE_ADDR slide) | |
917 | { | |
918 | struct objfile *debug_objfile; | |
919 | int changed = 0; | |
920 | ||
921 | changed |= objfile_rebase1 (objfile, slide); | |
922 | ||
923 | for (debug_objfile = objfile->separate_debug_objfile; | |
924 | debug_objfile; | |
925 | debug_objfile = objfile_separate_debug_iterate (objfile, debug_objfile)) | |
926 | changed |= objfile_rebase1 (debug_objfile, slide); | |
927 | ||
928 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
929 | if (changed) | |
930 | breakpoint_re_set (); | |
931 | } | |
c906108c | 932 | \f |
55333a84 DE |
933 | /* Return non-zero if OBJFILE has partial symbols. */ |
934 | ||
935 | int | |
936 | objfile_has_partial_symbols (struct objfile *objfile) | |
937 | { | |
b11896a5 TT |
938 | if (!objfile->sf) |
939 | return 0; | |
3e03848b JK |
940 | |
941 | /* If we have not read psymbols, but we have a function capable of reading | |
942 | them, then that is an indication that they are in fact available. Without | |
943 | this function the symbols may have been already read in but they also may | |
944 | not be present in this objfile. */ | |
945 | if ((objfile->flags & OBJF_PSYMTABS_READ) == 0 | |
946 | && objfile->sf->sym_read_psymbols != NULL) | |
947 | return 1; | |
948 | ||
b11896a5 | 949 | return objfile->sf->qf->has_symbols (objfile); |
55333a84 DE |
950 | } |
951 | ||
952 | /* Return non-zero if OBJFILE has full symbols. */ | |
953 | ||
954 | int | |
955 | objfile_has_full_symbols (struct objfile *objfile) | |
956 | { | |
957 | return objfile->symtabs != NULL; | |
958 | } | |
959 | ||
e361b228 | 960 | /* Return non-zero if OBJFILE has full or partial symbols, either directly |
15d123c9 | 961 | or through a separate debug file. */ |
e361b228 TG |
962 | |
963 | int | |
964 | objfile_has_symbols (struct objfile *objfile) | |
965 | { | |
15d123c9 | 966 | struct objfile *o; |
e361b228 | 967 | |
15d123c9 TG |
968 | for (o = objfile; o; o = objfile_separate_debug_iterate (objfile, o)) |
969 | if (objfile_has_partial_symbols (o) || objfile_has_full_symbols (o)) | |
970 | return 1; | |
e361b228 TG |
971 | return 0; |
972 | } | |
973 | ||
974 | ||
c906108c SS |
975 | /* Many places in gdb want to test just to see if we have any partial |
976 | symbols available. This function returns zero if none are currently | |
0df8b418 | 977 | available, nonzero otherwise. */ |
c906108c SS |
978 | |
979 | int | |
fba45db2 | 980 | have_partial_symbols (void) |
c906108c SS |
981 | { |
982 | struct objfile *ofp; | |
983 | ||
984 | ALL_OBJFILES (ofp) | |
c5aa993b | 985 | { |
55333a84 DE |
986 | if (objfile_has_partial_symbols (ofp)) |
987 | return 1; | |
c5aa993b | 988 | } |
c906108c SS |
989 | return 0; |
990 | } | |
991 | ||
992 | /* Many places in gdb want to test just to see if we have any full | |
993 | symbols available. This function returns zero if none are currently | |
0df8b418 | 994 | available, nonzero otherwise. */ |
c906108c SS |
995 | |
996 | int | |
fba45db2 | 997 | have_full_symbols (void) |
c906108c SS |
998 | { |
999 | struct objfile *ofp; | |
1000 | ||
1001 | ALL_OBJFILES (ofp) | |
c5aa993b | 1002 | { |
55333a84 DE |
1003 | if (objfile_has_full_symbols (ofp)) |
1004 | return 1; | |
c5aa993b | 1005 | } |
c906108c SS |
1006 | return 0; |
1007 | } | |
1008 | ||
1009 | ||
1010 | /* This operations deletes all objfile entries that represent solibs that | |
1011 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
0df8b418 MS |
1012 | command. */ |
1013 | ||
c906108c | 1014 | void |
fba45db2 | 1015 | objfile_purge_solibs (void) |
c906108c | 1016 | { |
c5aa993b JM |
1017 | struct objfile *objf; |
1018 | struct objfile *temp; | |
c906108c SS |
1019 | |
1020 | ALL_OBJFILES_SAFE (objf, temp) | |
1021 | { | |
1022 | /* We assume that the solib package has been purged already, or will | |
0df8b418 MS |
1023 | be soon. */ |
1024 | ||
2df3850c | 1025 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
c906108c SS |
1026 | free_objfile (objf); |
1027 | } | |
1028 | } | |
1029 | ||
1030 | ||
1031 | /* Many places in gdb want to test just to see if we have any minimal | |
1032 | symbols available. This function returns zero if none are currently | |
0df8b418 | 1033 | available, nonzero otherwise. */ |
c906108c SS |
1034 | |
1035 | int | |
fba45db2 | 1036 | have_minimal_symbols (void) |
c906108c SS |
1037 | { |
1038 | struct objfile *ofp; | |
1039 | ||
1040 | ALL_OBJFILES (ofp) | |
c5aa993b | 1041 | { |
15831452 | 1042 | if (ofp->minimal_symbol_count > 0) |
c5aa993b JM |
1043 | { |
1044 | return 1; | |
1045 | } | |
1046 | } | |
c906108c SS |
1047 | return 0; |
1048 | } | |
1049 | ||
a845f5cb PP |
1050 | /* Qsort comparison function. */ |
1051 | ||
1052 | static int | |
1053 | qsort_cmp (const void *a, const void *b) | |
1054 | { | |
1055 | const struct obj_section *sect1 = *(const struct obj_section **) a; | |
1056 | const struct obj_section *sect2 = *(const struct obj_section **) b; | |
1057 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1058 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1059 | ||
1060 | if (sect1_addr < sect2_addr) | |
6fbf07cd | 1061 | return -1; |
a845f5cb | 1062 | else if (sect1_addr > sect2_addr) |
6fbf07cd PP |
1063 | return 1; |
1064 | else | |
5cc80db3 MS |
1065 | { |
1066 | /* Sections are at the same address. This could happen if | |
1067 | A) we have an objfile and a separate debuginfo. | |
1068 | B) we are confused, and have added sections without proper relocation, | |
0df8b418 | 1069 | or something like that. */ |
5cc80db3 MS |
1070 | |
1071 | const struct objfile *const objfile1 = sect1->objfile; | |
1072 | const struct objfile *const objfile2 = sect2->objfile; | |
1073 | ||
1074 | if (objfile1->separate_debug_objfile == objfile2 | |
1075 | || objfile2->separate_debug_objfile == objfile1) | |
1076 | { | |
1077 | /* Case A. The ordering doesn't matter: separate debuginfo files | |
1078 | will be filtered out later. */ | |
1079 | ||
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | /* Case B. Maintain stable sort order, so bugs in GDB are easier to | |
1084 | triage. This section could be slow (since we iterate over all | |
1085 | objfiles in each call to qsort_cmp), but this shouldn't happen | |
1086 | very often (GDB is already in a confused state; one hopes this | |
1087 | doesn't happen at all). If you discover that significant time is | |
1088 | spent in the loops below, do 'set complaints 100' and examine the | |
1089 | resulting complaints. */ | |
1090 | ||
1091 | if (objfile1 == objfile2) | |
1092 | { | |
1093 | /* Both sections came from the same objfile. We are really confused. | |
1094 | Sort on sequence order of sections within the objfile. */ | |
1095 | ||
1096 | const struct obj_section *osect; | |
1097 | ||
1098 | ALL_OBJFILE_OSECTIONS (objfile1, osect) | |
1099 | if (osect == sect1) | |
1100 | return -1; | |
1101 | else if (osect == sect2) | |
1102 | return 1; | |
1103 | ||
1104 | /* We should have found one of the sections before getting here. */ | |
f3574227 | 1105 | gdb_assert_not_reached ("section not found"); |
5cc80db3 MS |
1106 | } |
1107 | else | |
1108 | { | |
1109 | /* Sort on sequence number of the objfile in the chain. */ | |
1110 | ||
1111 | const struct objfile *objfile; | |
1112 | ||
1113 | ALL_OBJFILES (objfile) | |
1114 | if (objfile == objfile1) | |
1115 | return -1; | |
1116 | else if (objfile == objfile2) | |
1117 | return 1; | |
1118 | ||
1119 | /* We should have found one of the objfiles before getting here. */ | |
f3574227 | 1120 | gdb_assert_not_reached ("objfile not found"); |
5cc80db3 MS |
1121 | } |
1122 | } | |
6fbf07cd PP |
1123 | |
1124 | /* Unreachable. */ | |
f3574227 | 1125 | gdb_assert_not_reached ("unexpected code path"); |
a845f5cb PP |
1126 | return 0; |
1127 | } | |
1128 | ||
3aad21cf PP |
1129 | /* Select "better" obj_section to keep. We prefer the one that came from |
1130 | the real object, rather than the one from separate debuginfo. | |
1131 | Most of the time the two sections are exactly identical, but with | |
1132 | prelinking the .rel.dyn section in the real object may have different | |
1133 | size. */ | |
1134 | ||
1135 | static struct obj_section * | |
1136 | preferred_obj_section (struct obj_section *a, struct obj_section *b) | |
1137 | { | |
1138 | gdb_assert (obj_section_addr (a) == obj_section_addr (b)); | |
1139 | gdb_assert ((a->objfile->separate_debug_objfile == b->objfile) | |
1140 | || (b->objfile->separate_debug_objfile == a->objfile)); | |
1141 | gdb_assert ((a->objfile->separate_debug_objfile_backlink == b->objfile) | |
1142 | || (b->objfile->separate_debug_objfile_backlink == a->objfile)); | |
1143 | ||
1144 | if (a->objfile->separate_debug_objfile != NULL) | |
1145 | return a; | |
1146 | return b; | |
1147 | } | |
1148 | ||
6fbf07cd PP |
1149 | /* Return 1 if SECTION should be inserted into the section map. |
1150 | We want to insert only non-overlay and non-TLS section. */ | |
1151 | ||
1152 | static int | |
1153 | insert_section_p (const struct bfd *abfd, | |
1154 | const struct bfd_section *section) | |
1155 | { | |
1156 | const bfd_vma lma = bfd_section_lma (abfd, section); | |
1157 | ||
50f8ea94 | 1158 | if (overlay_debugging && lma != 0 && lma != bfd_section_vma (abfd, section) |
6fbf07cd PP |
1159 | && (bfd_get_file_flags (abfd) & BFD_IN_MEMORY) == 0) |
1160 | /* This is an overlay section. IN_MEMORY check is needed to avoid | |
1161 | discarding sections from the "system supplied DSO" (aka vdso) | |
1162 | on some Linux systems (e.g. Fedora 11). */ | |
1163 | return 0; | |
1164 | if ((bfd_get_section_flags (abfd, section) & SEC_THREAD_LOCAL) != 0) | |
1165 | /* This is a TLS section. */ | |
1166 | return 0; | |
1167 | ||
1168 | return 1; | |
1169 | } | |
1170 | ||
1171 | /* Filter out overlapping sections where one section came from the real | |
1172 | objfile, and the other from a separate debuginfo file. | |
1173 | Return the size of table after redundant sections have been eliminated. */ | |
1174 | ||
1175 | static int | |
1176 | filter_debuginfo_sections (struct obj_section **map, int map_size) | |
1177 | { | |
1178 | int i, j; | |
1179 | ||
1180 | for (i = 0, j = 0; i < map_size - 1; i++) | |
1181 | { | |
1182 | struct obj_section *const sect1 = map[i]; | |
1183 | struct obj_section *const sect2 = map[i + 1]; | |
1184 | const struct objfile *const objfile1 = sect1->objfile; | |
1185 | const struct objfile *const objfile2 = sect2->objfile; | |
1186 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1187 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1188 | ||
1189 | if (sect1_addr == sect2_addr | |
1190 | && (objfile1->separate_debug_objfile == objfile2 | |
1191 | || objfile2->separate_debug_objfile == objfile1)) | |
1192 | { | |
1193 | map[j++] = preferred_obj_section (sect1, sect2); | |
1194 | ++i; | |
1195 | } | |
1196 | else | |
1197 | map[j++] = sect1; | |
1198 | } | |
1199 | ||
1200 | if (i < map_size) | |
1201 | { | |
1202 | gdb_assert (i == map_size - 1); | |
1203 | map[j++] = map[i]; | |
1204 | } | |
1205 | ||
1206 | /* The map should not have shrunk to less than half the original size. */ | |
1207 | gdb_assert (map_size / 2 <= j); | |
1208 | ||
1209 | return j; | |
1210 | } | |
1211 | ||
1212 | /* Filter out overlapping sections, issuing a warning if any are found. | |
1213 | Overlapping sections could really be overlay sections which we didn't | |
1214 | classify as such in insert_section_p, or we could be dealing with a | |
1215 | corrupt binary. */ | |
1216 | ||
1217 | static int | |
1218 | filter_overlapping_sections (struct obj_section **map, int map_size) | |
1219 | { | |
1220 | int i, j; | |
1221 | ||
1222 | for (i = 0, j = 0; i < map_size - 1; ) | |
1223 | { | |
1224 | int k; | |
1225 | ||
1226 | map[j++] = map[i]; | |
1227 | for (k = i + 1; k < map_size; k++) | |
1228 | { | |
1229 | struct obj_section *const sect1 = map[i]; | |
1230 | struct obj_section *const sect2 = map[k]; | |
1231 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1232 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1233 | const CORE_ADDR sect1_endaddr = obj_section_endaddr (sect1); | |
1234 | ||
1235 | gdb_assert (sect1_addr <= sect2_addr); | |
1236 | ||
1237 | if (sect1_endaddr <= sect2_addr) | |
1238 | break; | |
1239 | else | |
1240 | { | |
1241 | /* We have an overlap. Report it. */ | |
1242 | ||
1243 | struct objfile *const objf1 = sect1->objfile; | |
1244 | struct objfile *const objf2 = sect2->objfile; | |
1245 | ||
6fbf07cd PP |
1246 | const struct bfd_section *const bfds1 = sect1->the_bfd_section; |
1247 | const struct bfd_section *const bfds2 = sect2->the_bfd_section; | |
1248 | ||
1249 | const CORE_ADDR sect2_endaddr = obj_section_endaddr (sect2); | |
1250 | ||
1251 | struct gdbarch *const gdbarch = get_objfile_arch (objf1); | |
1252 | ||
1253 | complaint (&symfile_complaints, | |
1254 | _("unexpected overlap between:\n" | |
1255 | " (A) section `%s' from `%s' [%s, %s)\n" | |
1256 | " (B) section `%s' from `%s' [%s, %s).\n" | |
1257 | "Will ignore section B"), | |
4262abfb | 1258 | bfd_section_name (abfd1, bfds1), objfile_name (objf1), |
6fbf07cd PP |
1259 | paddress (gdbarch, sect1_addr), |
1260 | paddress (gdbarch, sect1_endaddr), | |
4262abfb | 1261 | bfd_section_name (abfd2, bfds2), objfile_name (objf2), |
6fbf07cd PP |
1262 | paddress (gdbarch, sect2_addr), |
1263 | paddress (gdbarch, sect2_endaddr)); | |
1264 | } | |
1265 | } | |
1266 | i = k; | |
1267 | } | |
1268 | ||
1269 | if (i < map_size) | |
1270 | { | |
1271 | gdb_assert (i == map_size - 1); | |
1272 | map[j++] = map[i]; | |
1273 | } | |
1274 | ||
1275 | return j; | |
1276 | } | |
1277 | ||
1278 | ||
1279 | /* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any | |
1280 | TLS, overlay and overlapping sections. */ | |
a845f5cb PP |
1281 | |
1282 | static void | |
6c95b8df PA |
1283 | update_section_map (struct program_space *pspace, |
1284 | struct obj_section ***pmap, int *pmap_size) | |
a845f5cb | 1285 | { |
607ece04 | 1286 | struct objfile_pspace_info *pspace_info; |
6fbf07cd | 1287 | int alloc_size, map_size, i; |
a845f5cb PP |
1288 | struct obj_section *s, **map; |
1289 | struct objfile *objfile; | |
1290 | ||
607ece04 GB |
1291 | pspace_info = get_objfile_pspace_data (pspace); |
1292 | gdb_assert (pspace_info->section_map_dirty != 0 | |
1293 | || pspace_info->new_objfiles_available != 0); | |
a845f5cb PP |
1294 | |
1295 | map = *pmap; | |
1296 | xfree (map); | |
1297 | ||
6fbf07cd | 1298 | alloc_size = 0; |
6c95b8df PA |
1299 | ALL_PSPACE_OBJFILES (pspace, objfile) |
1300 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
1301 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1302 | alloc_size += 1; | |
a845f5cb | 1303 | |
65a97ab3 PP |
1304 | /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */ |
1305 | if (alloc_size == 0) | |
1306 | { | |
1307 | *pmap = NULL; | |
1308 | *pmap_size = 0; | |
1309 | return; | |
1310 | } | |
1311 | ||
6fbf07cd | 1312 | map = xmalloc (alloc_size * sizeof (*map)); |
a845f5cb | 1313 | |
3aad21cf | 1314 | i = 0; |
6c95b8df PA |
1315 | ALL_PSPACE_OBJFILES (pspace, objfile) |
1316 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
1317 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1318 | map[i++] = s; | |
a845f5cb | 1319 | |
6fbf07cd PP |
1320 | qsort (map, alloc_size, sizeof (*map), qsort_cmp); |
1321 | map_size = filter_debuginfo_sections(map, alloc_size); | |
1322 | map_size = filter_overlapping_sections(map, map_size); | |
a845f5cb | 1323 | |
6fbf07cd PP |
1324 | if (map_size < alloc_size) |
1325 | /* Some sections were eliminated. Trim excess space. */ | |
1326 | map = xrealloc (map, map_size * sizeof (*map)); | |
3aad21cf | 1327 | else |
6fbf07cd | 1328 | gdb_assert (alloc_size == map_size); |
3aad21cf | 1329 | |
a845f5cb PP |
1330 | *pmap = map; |
1331 | *pmap_size = map_size; | |
1332 | } | |
1333 | ||
0df8b418 | 1334 | /* Bsearch comparison function. */ |
a845f5cb PP |
1335 | |
1336 | static int | |
1337 | bsearch_cmp (const void *key, const void *elt) | |
1338 | { | |
1339 | const CORE_ADDR pc = *(CORE_ADDR *) key; | |
1340 | const struct obj_section *section = *(const struct obj_section **) elt; | |
1341 | ||
1342 | if (pc < obj_section_addr (section)) | |
1343 | return -1; | |
1344 | if (pc < obj_section_endaddr (section)) | |
1345 | return 0; | |
1346 | return 1; | |
1347 | } | |
1348 | ||
714835d5 | 1349 | /* Returns a section whose range includes PC or NULL if none found. */ |
c906108c SS |
1350 | |
1351 | struct obj_section * | |
714835d5 | 1352 | find_pc_section (CORE_ADDR pc) |
c906108c | 1353 | { |
6c95b8df | 1354 | struct objfile_pspace_info *pspace_info; |
a845f5cb | 1355 | struct obj_section *s, **sp; |
c5aa993b | 1356 | |
714835d5 UW |
1357 | /* Check for mapped overlay section first. */ |
1358 | s = find_pc_mapped_section (pc); | |
1359 | if (s) | |
1360 | return s; | |
c906108c | 1361 | |
6c95b8df | 1362 | pspace_info = get_objfile_pspace_data (current_program_space); |
607ece04 GB |
1363 | if (pspace_info->section_map_dirty |
1364 | || (pspace_info->new_objfiles_available | |
1365 | && !pspace_info->inhibit_updates)) | |
a845f5cb | 1366 | { |
6c95b8df PA |
1367 | update_section_map (current_program_space, |
1368 | &pspace_info->sections, | |
1369 | &pspace_info->num_sections); | |
c906108c | 1370 | |
6c95b8df PA |
1371 | /* Don't need updates to section map until objfiles are added, |
1372 | removed or relocated. */ | |
607ece04 GB |
1373 | pspace_info->new_objfiles_available = 0; |
1374 | pspace_info->section_map_dirty = 0; | |
a845f5cb PP |
1375 | } |
1376 | ||
65a97ab3 PP |
1377 | /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to |
1378 | bsearch be non-NULL. */ | |
1379 | if (pspace_info->sections == NULL) | |
1380 | { | |
1381 | gdb_assert (pspace_info->num_sections == 0); | |
1382 | return NULL; | |
1383 | } | |
1384 | ||
6c95b8df PA |
1385 | sp = (struct obj_section **) bsearch (&pc, |
1386 | pspace_info->sections, | |
1387 | pspace_info->num_sections, | |
1388 | sizeof (*pspace_info->sections), | |
1389 | bsearch_cmp); | |
a845f5cb PP |
1390 | if (sp != NULL) |
1391 | return *sp; | |
714835d5 | 1392 | return NULL; |
c906108c | 1393 | } |
c5aa993b | 1394 | |
c906108c | 1395 | |
3e5d3a5a | 1396 | /* Return non-zero if PC is in a section called NAME. */ |
c906108c SS |
1397 | |
1398 | int | |
3e5d3a5a | 1399 | pc_in_section (CORE_ADDR pc, char *name) |
c906108c SS |
1400 | { |
1401 | struct obj_section *s; | |
1402 | int retval = 0; | |
c5aa993b JM |
1403 | |
1404 | s = find_pc_section (pc); | |
1405 | ||
c906108c SS |
1406 | retval = (s != NULL |
1407 | && s->the_bfd_section->name != NULL | |
3e5d3a5a | 1408 | && strcmp (s->the_bfd_section->name, name) == 0); |
c5aa993b | 1409 | return (retval); |
c906108c | 1410 | } |
0d0e1a63 MK |
1411 | \f |
1412 | ||
607ece04 | 1413 | /* Set section_map_dirty so section map will be rebuilt next time it |
bb272892 | 1414 | is used. Called by reread_symbols. */ |
a845f5cb PP |
1415 | |
1416 | void | |
bb272892 | 1417 | objfiles_changed (void) |
a845f5cb | 1418 | { |
6c95b8df | 1419 | /* Rebuild section map next time we need it. */ |
607ece04 GB |
1420 | get_objfile_pspace_data (current_program_space)->section_map_dirty = 1; |
1421 | } | |
1422 | ||
1423 | /* See comments in objfiles.h. */ | |
1424 | ||
1425 | void | |
1426 | inhibit_section_map_updates (struct program_space *pspace) | |
1427 | { | |
1428 | get_objfile_pspace_data (pspace)->inhibit_updates = 1; | |
1429 | } | |
1430 | ||
1431 | /* See comments in objfiles.h. */ | |
1432 | ||
1433 | void | |
1434 | resume_section_map_updates (struct program_space *pspace) | |
1435 | { | |
1436 | get_objfile_pspace_data (pspace)->inhibit_updates = 0; | |
1437 | } | |
1438 | ||
1439 | /* See comments in objfiles.h. */ | |
1440 | ||
1441 | void | |
1442 | resume_section_map_updates_cleanup (void *arg) | |
1443 | { | |
1444 | resume_section_map_updates (arg); | |
a845f5cb | 1445 | } |
e3c69974 | 1446 | |
63644780 NB |
1447 | /* Return 1 if ADDR maps into one of the sections of OBJFILE and 0 |
1448 | otherwise. */ | |
1449 | ||
1450 | int | |
1451 | is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile) | |
1452 | { | |
1453 | struct obj_section *osect; | |
1454 | ||
1455 | if (objfile == NULL) | |
1456 | return 0; | |
1457 | ||
1458 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
1459 | { | |
1460 | if (section_is_overlay (osect) && !section_is_mapped (osect)) | |
1461 | continue; | |
1462 | ||
1463 | if (obj_section_addr (osect) <= addr | |
1464 | && addr < obj_section_endaddr (osect)) | |
1465 | return 1; | |
1466 | } | |
1467 | return 0; | |
1468 | } | |
1469 | ||
19630284 JB |
1470 | /* The default implementation for the "iterate_over_objfiles_in_search_order" |
1471 | gdbarch method. It is equivalent to use the ALL_OBJFILES macro, | |
1472 | searching the objfiles in the order they are stored internally, | |
1473 | ignoring CURRENT_OBJFILE. | |
1474 | ||
1475 | On most platorms, it should be close enough to doing the best | |
1476 | we can without some knowledge specific to the architecture. */ | |
1477 | ||
1478 | void | |
1479 | default_iterate_over_objfiles_in_search_order | |
1480 | (struct gdbarch *gdbarch, | |
1481 | iterate_over_objfiles_in_search_order_cb_ftype *cb, | |
1482 | void *cb_data, struct objfile *current_objfile) | |
1483 | { | |
1484 | int stop = 0; | |
1485 | struct objfile *objfile; | |
1486 | ||
1487 | ALL_OBJFILES (objfile) | |
1488 | { | |
1489 | stop = cb (objfile, cb_data); | |
1490 | if (stop) | |
1491 | return; | |
1492 | } | |
1493 | } | |
1494 | ||
4262abfb JK |
1495 | /* Return canonical name for OBJFILE. */ |
1496 | ||
1497 | const char * | |
1498 | objfile_name (const struct objfile *objfile) | |
1499 | { | |
24ba069a JK |
1500 | if (objfile->obfd != NULL) |
1501 | return bfd_get_filename (objfile->obfd); | |
1502 | ||
4262abfb JK |
1503 | return objfile->original_name; |
1504 | } | |
1505 | ||
6c95b8df PA |
1506 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
1507 | extern initialize_file_ftype _initialize_objfiles; | |
1508 | ||
1509 | void | |
1510 | _initialize_objfiles (void) | |
1511 | { | |
1512 | objfiles_pspace_data | |
8e260fc0 TT |
1513 | = register_program_space_data_with_cleanup (NULL, |
1514 | objfiles_pspace_data_cleanup); | |
706e3705 TT |
1515 | |
1516 | objfiles_bfd_data = register_bfd_data_with_cleanup (NULL, | |
1517 | objfile_bfd_data_free); | |
6c95b8df | 1518 | } |