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 | ||
c906108c | 36 | #include <sys/types.h> |
53ce3c39 | 37 | #include <sys/stat.h> |
c906108c | 38 | #include <fcntl.h> |
04ea0df1 | 39 | #include "gdb_obstack.h" |
2de7ced7 | 40 | #include "hashtab.h" |
c906108c | 41 | |
7a292a7a | 42 | #include "breakpoint.h" |
fe898f56 | 43 | #include "block.h" |
de4f826b | 44 | #include "dictionary.h" |
cb5d864f | 45 | #include "source.h" |
801e3a5b | 46 | #include "addrmap.h" |
5e2b427d | 47 | #include "arch-utils.h" |
30510692 | 48 | #include "exec.h" |
a845f5cb | 49 | #include "observer.h" |
6fbf07cd | 50 | #include "complaints.h" |
ccefe4c4 | 51 | #include "psymtab.h" |
0133421a | 52 | #include "solist.h" |
cbb099e8 | 53 | #include "gdb_bfd.h" |
afedecd3 | 54 | #include "btrace.h" |
7a292a7a | 55 | |
8e260fc0 TT |
56 | /* Keep a registry of per-objfile data-pointers required by other GDB |
57 | modules. */ | |
c906108c | 58 | |
6b81941e | 59 | DEFINE_REGISTRY (objfile, REGISTRY_ACCESS_FIELD) |
0d0e1a63 | 60 | |
c906108c | 61 | /* Externally visible variables that are owned by this module. |
0df8b418 | 62 | See declarations in objfile.h for more info. */ |
c906108c | 63 | |
6c95b8df PA |
64 | struct objfile_pspace_info |
65 | { | |
6c95b8df PA |
66 | struct obj_section **sections; |
67 | int num_sections; | |
607ece04 GB |
68 | |
69 | /* Nonzero if object files have been added since the section map | |
70 | was last updated. */ | |
71 | int new_objfiles_available; | |
72 | ||
73 | /* Nonzero if the section map MUST be updated before use. */ | |
74 | int section_map_dirty; | |
75 | ||
76 | /* Nonzero if section map updates should be inhibited if possible. */ | |
77 | int inhibit_updates; | |
6c95b8df PA |
78 | }; |
79 | ||
80 | /* Per-program-space data key. */ | |
81 | static const struct program_space_data *objfiles_pspace_data; | |
82 | ||
83 | static void | |
84 | objfiles_pspace_data_cleanup (struct program_space *pspace, void *arg) | |
85 | { | |
487ad57c | 86 | struct objfile_pspace_info *info = arg; |
6c95b8df | 87 | |
487ad57c YQ |
88 | xfree (info->sections); |
89 | xfree (info); | |
6c95b8df PA |
90 | } |
91 | ||
92 | /* Get the current svr4 data. If none is found yet, add it now. This | |
93 | function always returns a valid object. */ | |
94 | ||
95 | static struct objfile_pspace_info * | |
96 | get_objfile_pspace_data (struct program_space *pspace) | |
97 | { | |
98 | struct objfile_pspace_info *info; | |
99 | ||
100 | info = program_space_data (pspace, objfiles_pspace_data); | |
101 | if (info == NULL) | |
102 | { | |
41bf6aca | 103 | info = XCNEW (struct objfile_pspace_info); |
6c95b8df PA |
104 | set_program_space_data (pspace, objfiles_pspace_data, info); |
105 | } | |
106 | ||
107 | return info; | |
108 | } | |
109 | ||
706e3705 TT |
110 | \f |
111 | ||
112 | /* Per-BFD data key. */ | |
113 | ||
114 | static const struct bfd_data *objfiles_bfd_data; | |
115 | ||
116 | /* Create the per-BFD storage object for OBJFILE. If ABFD is not | |
117 | NULL, and it already has a per-BFD storage object, use that. | |
118 | Otherwise, allocate a new per-BFD storage object. If ABFD is not | |
119 | NULL, the object is allocated on the BFD; otherwise it is allocated | |
120 | on OBJFILE's obstack. Note that it is not safe to call this | |
121 | multiple times for a given OBJFILE -- it can only be called when | |
122 | allocating or re-initializing OBJFILE. */ | |
123 | ||
124 | static struct objfile_per_bfd_storage * | |
125 | get_objfile_bfd_data (struct objfile *objfile, struct bfd *abfd) | |
126 | { | |
127 | struct objfile_per_bfd_storage *storage = NULL; | |
128 | ||
129 | if (abfd != NULL) | |
130 | storage = bfd_data (abfd, objfiles_bfd_data); | |
131 | ||
132 | if (storage == NULL) | |
133 | { | |
1da77581 TT |
134 | /* If the object requires gdb to do relocations, we simply fall |
135 | back to not sharing data across users. These cases are rare | |
136 | enough that this seems reasonable. */ | |
137 | if (abfd != NULL && !gdb_bfd_requires_relocations (abfd)) | |
706e3705 TT |
138 | { |
139 | storage = bfd_zalloc (abfd, sizeof (struct objfile_per_bfd_storage)); | |
140 | set_bfd_data (abfd, objfiles_bfd_data, storage); | |
141 | } | |
142 | else | |
143 | storage = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
144 | struct objfile_per_bfd_storage); | |
145 | ||
1da77581 TT |
146 | /* Look up the gdbarch associated with the BFD. */ |
147 | if (abfd != NULL) | |
148 | storage->gdbarch = gdbarch_from_bfd (abfd); | |
149 | ||
706e3705 TT |
150 | obstack_init (&storage->storage_obstack); |
151 | storage->filename_cache = bcache_xmalloc (NULL, NULL); | |
6532ff36 | 152 | storage->macro_cache = bcache_xmalloc (NULL, NULL); |
3d548a53 | 153 | storage->language_of_main = language_unknown; |
706e3705 TT |
154 | } |
155 | ||
156 | return storage; | |
157 | } | |
158 | ||
159 | /* Free STORAGE. */ | |
160 | ||
161 | static void | |
162 | free_objfile_per_bfd_storage (struct objfile_per_bfd_storage *storage) | |
163 | { | |
164 | bcache_xfree (storage->filename_cache); | |
6532ff36 | 165 | bcache_xfree (storage->macro_cache); |
84a1243b TT |
166 | if (storage->demangled_names_hash) |
167 | htab_delete (storage->demangled_names_hash); | |
706e3705 TT |
168 | obstack_free (&storage->storage_obstack, 0); |
169 | } | |
170 | ||
171 | /* A wrapper for free_objfile_per_bfd_storage that can be passed as a | |
172 | cleanup function to the BFD registry. */ | |
173 | ||
174 | static void | |
175 | objfile_bfd_data_free (struct bfd *unused, void *d) | |
176 | { | |
177 | free_objfile_per_bfd_storage (d); | |
178 | } | |
179 | ||
180 | /* See objfiles.h. */ | |
181 | ||
182 | void | |
183 | set_objfile_per_bfd (struct objfile *objfile) | |
184 | { | |
185 | objfile->per_bfd = get_objfile_bfd_data (objfile, objfile->obfd); | |
186 | } | |
187 | ||
3d548a53 TT |
188 | /* Set the objfile's per-BFD notion of the "main" name and |
189 | language. */ | |
190 | ||
191 | void | |
192 | set_objfile_main_name (struct objfile *objfile, | |
193 | const char *name, enum language lang) | |
194 | { | |
195 | if (objfile->per_bfd->name_of_main == NULL | |
196 | || strcmp (objfile->per_bfd->name_of_main, name) != 0) | |
197 | objfile->per_bfd->name_of_main | |
198 | = obstack_copy0 (&objfile->per_bfd->storage_obstack, name, strlen (name)); | |
199 | objfile->per_bfd->language_of_main = lang; | |
200 | } | |
201 | ||
706e3705 TT |
202 | \f |
203 | ||
96baa820 JM |
204 | /* Called via bfd_map_over_sections to build up the section table that |
205 | the objfile references. The objfile contains pointers to the start | |
206 | of the table (objfile->sections) and to the first location after | |
0df8b418 | 207 | the end of the table (objfile->sections_end). */ |
96baa820 | 208 | |
65cf3563 TT |
209 | static void |
210 | add_to_objfile_sections_full (struct bfd *abfd, struct bfd_section *asect, | |
211 | struct objfile *objfile, int force) | |
212 | { | |
213 | struct obj_section *section; | |
214 | ||
215 | if (!force) | |
216 | { | |
217 | flagword aflag; | |
218 | ||
219 | aflag = bfd_get_section_flags (abfd, asect); | |
220 | if (!(aflag & SEC_ALLOC)) | |
221 | return; | |
222 | } | |
223 | ||
224 | section = &objfile->sections[gdb_bfd_section_index (abfd, asect)]; | |
225 | section->objfile = objfile; | |
226 | section->the_bfd_section = asect; | |
227 | section->ovly_mapped = 0; | |
228 | } | |
229 | ||
c906108c | 230 | static void |
7be0c536 | 231 | add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
d82ea6a8 | 232 | void *objfilep) |
c906108c | 233 | { |
65cf3563 | 234 | add_to_objfile_sections_full (abfd, asect, objfilep, 0); |
c906108c SS |
235 | } |
236 | ||
237 | /* Builds a section table for OBJFILE. | |
96baa820 | 238 | |
65cf3563 TT |
239 | Note that the OFFSET and OVLY_MAPPED in each table entry are |
240 | initialized to zero. */ | |
c906108c | 241 | |
d82ea6a8 | 242 | void |
fba45db2 | 243 | build_objfile_section_table (struct objfile *objfile) |
c906108c | 244 | { |
65cf3563 TT |
245 | int count = gdb_bfd_count_sections (objfile->obfd); |
246 | ||
247 | objfile->sections = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
248 | count, | |
249 | struct obj_section); | |
250 | objfile->sections_end = (objfile->sections + count); | |
f1f6aadf PA |
251 | bfd_map_over_sections (objfile->obfd, |
252 | add_to_objfile_sections, (void *) objfile); | |
65cf3563 TT |
253 | |
254 | /* See gdb_bfd_section_index. */ | |
255 | add_to_objfile_sections_full (objfile->obfd, bfd_com_section_ptr, objfile, 1); | |
256 | add_to_objfile_sections_full (objfile->obfd, bfd_und_section_ptr, objfile, 1); | |
257 | add_to_objfile_sections_full (objfile->obfd, bfd_abs_section_ptr, objfile, 1); | |
258 | add_to_objfile_sections_full (objfile->obfd, bfd_ind_section_ptr, objfile, 1); | |
c906108c SS |
259 | } |
260 | ||
2df3850c JM |
261 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits |
262 | allocate a new objfile struct, fill it in as best we can, link it | |
263 | into the list of all known objfiles, and return a pointer to the | |
264 | new objfile struct. | |
c906108c | 265 | |
24ba069a JK |
266 | NAME should contain original non-canonicalized filename or other |
267 | identifier as entered by user. If there is no better source use | |
268 | bfd_get_filename (ABFD). NAME may be NULL only if ABFD is NULL. | |
269 | NAME content is copied into returned objfile. | |
270 | ||
2df3850c | 271 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
78a4a9b9 | 272 | requests for specific operations. Other bits like OBJF_SHARED are |
0df8b418 | 273 | simply copied through to the new objfile flags member. */ |
c906108c | 274 | |
eb9a305d DC |
275 | /* NOTE: carlton/2003-02-04: This function is called with args NULL, 0 |
276 | by jv-lang.c, to create an artificial objfile used to hold | |
277 | information about dynamically-loaded Java classes. Unfortunately, | |
278 | that branch of this function doesn't get tested very frequently, so | |
279 | it's prone to breakage. (E.g. at one time the name was set to NULL | |
280 | in that situation, which broke a loop over all names in the dynamic | |
281 | library loader.) If you change this function, please try to leave | |
282 | things in a consistent state even if abfd is NULL. */ | |
283 | ||
c906108c | 284 | struct objfile * |
24ba069a | 285 | allocate_objfile (bfd *abfd, const char *name, int flags) |
c906108c | 286 | { |
2f6e5d7e | 287 | struct objfile *objfile; |
04affae3 | 288 | char *expanded_name; |
c906108c | 289 | |
6a0fa043 | 290 | objfile = (struct objfile *) xzalloc (sizeof (struct objfile)); |
710e1a31 | 291 | objfile->psymbol_cache = psymbol_bcache_init (); |
2f6e5d7e TG |
292 | /* We could use obstack_specify_allocation here instead, but |
293 | gdb_obstack.h specifies the alloc/dealloc functions. */ | |
294 | obstack_init (&objfile->objfile_obstack); | |
c906108c | 295 | |
0d0e1a63 MK |
296 | objfile_alloc_data (objfile); |
297 | ||
24ba069a JK |
298 | if (name == NULL) |
299 | { | |
300 | gdb_assert (abfd == NULL); | |
40135bb1 | 301 | gdb_assert ((flags & OBJF_NOT_FILENAME) != 0); |
04affae3 | 302 | expanded_name = xstrdup ("<<anonymous objfile>>"); |
24ba069a | 303 | } |
04affae3 JK |
304 | else if ((flags & OBJF_NOT_FILENAME) != 0) |
305 | expanded_name = xstrdup (name); | |
306 | else | |
307 | expanded_name = gdb_abspath (name); | |
308 | objfile->original_name = obstack_copy0 (&objfile->objfile_obstack, | |
309 | expanded_name, | |
310 | strlen (expanded_name)); | |
311 | xfree (expanded_name); | |
312 | ||
313 | /* Update the per-objfile information that comes from the bfd, ensuring | |
314 | that any data that is reference is saved in the per-objfile data | |
315 | region. */ | |
24ba069a | 316 | |
d3e81981 DE |
317 | /* Update the per-objfile information that comes from the bfd, ensuring |
318 | that any data that is reference is saved in the per-objfile data | |
319 | region. */ | |
320 | ||
cbb099e8 | 321 | objfile->obfd = abfd; |
8ac244b4 | 322 | gdb_bfd_ref (abfd); |
c906108c SS |
323 | if (abfd != NULL) |
324 | { | |
c5aa993b | 325 | objfile->mtime = bfd_get_mtime (abfd); |
c906108c SS |
326 | |
327 | /* Build section table. */ | |
d82ea6a8 | 328 | build_objfile_section_table (objfile); |
c906108c SS |
329 | } |
330 | ||
706e3705 | 331 | objfile->per_bfd = get_objfile_bfd_data (objfile, abfd); |
6c95b8df PA |
332 | objfile->pspace = current_program_space; |
333 | ||
34643a32 TT |
334 | terminate_minimal_symbol_table (objfile); |
335 | ||
b8fbeb18 | 336 | /* Initialize the section indexes for this objfile, so that we can |
0df8b418 | 337 | later detect if they are used w/o being properly assigned to. */ |
b8fbeb18 | 338 | |
5c4e30ca DC |
339 | objfile->sect_index_text = -1; |
340 | objfile->sect_index_data = -1; | |
341 | objfile->sect_index_bss = -1; | |
342 | objfile->sect_index_rodata = -1; | |
343 | ||
0df8b418 | 344 | /* Add this file onto the tail of the linked list of other such files. */ |
c906108c | 345 | |
c5aa993b | 346 | objfile->next = NULL; |
c906108c SS |
347 | if (object_files == NULL) |
348 | object_files = objfile; | |
349 | else | |
350 | { | |
2f6e5d7e TG |
351 | struct objfile *last_one; |
352 | ||
c906108c | 353 | for (last_one = object_files; |
c5aa993b JM |
354 | last_one->next; |
355 | last_one = last_one->next); | |
356 | last_one->next = objfile; | |
c906108c SS |
357 | } |
358 | ||
0df8b418 | 359 | /* Save passed in flag bits. */ |
2df3850c | 360 | objfile->flags |= flags; |
c906108c | 361 | |
6c95b8df | 362 | /* Rebuild section map next time we need it. */ |
607ece04 | 363 | get_objfile_pspace_data (objfile->pspace)->new_objfiles_available = 1; |
bb272892 | 364 | |
6c95b8df | 365 | return objfile; |
c906108c SS |
366 | } |
367 | ||
5e2b427d UW |
368 | /* Retrieve the gdbarch associated with OBJFILE. */ |
369 | struct gdbarch * | |
370 | get_objfile_arch (struct objfile *objfile) | |
371 | { | |
df6d5441 | 372 | return objfile->per_bfd->gdbarch; |
5e2b427d UW |
373 | } |
374 | ||
abd0a5fa JK |
375 | /* If there is a valid and known entry point, function fills *ENTRY_P with it |
376 | and returns non-zero; otherwise it returns zero. */ | |
9ab9195f | 377 | |
abd0a5fa JK |
378 | int |
379 | entry_point_address_query (CORE_ADDR *entry_p) | |
9ab9195f | 380 | { |
6ef55de7 | 381 | if (symfile_objfile == NULL || !symfile_objfile->per_bfd->ei.entry_point_p) |
3612b192 DJ |
382 | return 0; |
383 | ||
6ef55de7 | 384 | *entry_p = (symfile_objfile->per_bfd->ei.entry_point |
53eddfa6 | 385 | + ANOFFSET (symfile_objfile->section_offsets, |
6ef55de7 | 386 | symfile_objfile->per_bfd->ei.the_bfd_section_index)); |
3612b192 | 387 | |
abd0a5fa JK |
388 | return 1; |
389 | } | |
390 | ||
391 | /* Get current entry point address. Call error if it is not known. */ | |
392 | ||
393 | CORE_ADDR | |
394 | entry_point_address (void) | |
395 | { | |
396 | CORE_ADDR retval; | |
397 | ||
398 | if (!entry_point_address_query (&retval)) | |
399 | error (_("Entry point address is not known.")); | |
400 | ||
401 | return retval; | |
9ab9195f | 402 | } |
15831452 | 403 | |
15d123c9 TG |
404 | /* Iterator on PARENT and every separate debug objfile of PARENT. |
405 | The usage pattern is: | |
406 | for (objfile = parent; | |
407 | objfile; | |
408 | objfile = objfile_separate_debug_iterate (parent, objfile)) | |
409 | ... | |
410 | */ | |
411 | ||
412 | struct objfile * | |
413 | objfile_separate_debug_iterate (const struct objfile *parent, | |
414 | const struct objfile *objfile) | |
415 | { | |
416 | struct objfile *res; | |
417 | ||
399f313b | 418 | /* If any, return the first child. */ |
15d123c9 TG |
419 | res = objfile->separate_debug_objfile; |
420 | if (res) | |
421 | return res; | |
422 | ||
15d123c9 TG |
423 | /* Common case where there is no separate debug objfile. */ |
424 | if (objfile == parent) | |
425 | return NULL; | |
426 | ||
399f313b TG |
427 | /* Return the brother if any. Note that we don't iterate on brothers of |
428 | the parents. */ | |
429 | res = objfile->separate_debug_objfile_link; | |
430 | if (res) | |
431 | return res; | |
432 | ||
15d123c9 TG |
433 | for (res = objfile->separate_debug_objfile_backlink; |
434 | res != parent; | |
435 | res = res->separate_debug_objfile_backlink) | |
436 | { | |
437 | gdb_assert (res != NULL); | |
438 | if (res->separate_debug_objfile_link) | |
439 | return res->separate_debug_objfile_link; | |
440 | } | |
441 | return NULL; | |
442 | } | |
15831452 | 443 | |
5b5d99cf JB |
444 | /* Put one object file before a specified on in the global list. |
445 | This can be used to make sure an object file is destroyed before | |
0df8b418 | 446 | another when using ALL_OBJFILES_SAFE to free all objfiles. */ |
5b5d99cf JB |
447 | void |
448 | put_objfile_before (struct objfile *objfile, struct objfile *before_this) | |
449 | { | |
450 | struct objfile **objp; | |
451 | ||
452 | unlink_objfile (objfile); | |
453 | ||
454 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
455 | { | |
456 | if (*objp == before_this) | |
457 | { | |
458 | objfile->next = *objp; | |
459 | *objp = objfile; | |
460 | return; | |
461 | } | |
462 | } | |
463 | ||
464 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 465 | _("put_objfile_before: before objfile not in list")); |
5b5d99cf JB |
466 | } |
467 | ||
c906108c SS |
468 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the |
469 | list. | |
470 | ||
471 | It is not a bug, or error, to call this function if OBJFILE is not known | |
472 | to be in the current list. This is done in the case of mapped objfiles, | |
473 | for example, just to ensure that the mapped objfile doesn't appear twice | |
474 | in the list. Since the list is threaded, linking in a mapped objfile | |
475 | twice would create a circular list. | |
476 | ||
477 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
478 | unlinking it, just to ensure that we have completely severed any linkages | |
0df8b418 | 479 | between the OBJFILE and the list. */ |
c906108c SS |
480 | |
481 | void | |
fba45db2 | 482 | unlink_objfile (struct objfile *objfile) |
c906108c | 483 | { |
c5aa993b | 484 | struct objfile **objpp; |
c906108c | 485 | |
c5aa993b | 486 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
c906108c | 487 | { |
c5aa993b | 488 | if (*objpp == objfile) |
c906108c | 489 | { |
c5aa993b JM |
490 | *objpp = (*objpp)->next; |
491 | objfile->next = NULL; | |
07cd4b97 | 492 | return; |
c906108c SS |
493 | } |
494 | } | |
07cd4b97 | 495 | |
8e65ff28 | 496 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 497 | _("unlink_objfile: objfile already unlinked")); |
c906108c SS |
498 | } |
499 | ||
15d123c9 TG |
500 | /* Add OBJFILE as a separate debug objfile of PARENT. */ |
501 | ||
502 | void | |
503 | add_separate_debug_objfile (struct objfile *objfile, struct objfile *parent) | |
504 | { | |
505 | gdb_assert (objfile && parent); | |
506 | ||
507 | /* Must not be already in a list. */ | |
508 | gdb_assert (objfile->separate_debug_objfile_backlink == NULL); | |
509 | gdb_assert (objfile->separate_debug_objfile_link == NULL); | |
8a92335b JK |
510 | gdb_assert (objfile->separate_debug_objfile == NULL); |
511 | gdb_assert (parent->separate_debug_objfile_backlink == NULL); | |
512 | gdb_assert (parent->separate_debug_objfile_link == NULL); | |
15d123c9 TG |
513 | |
514 | objfile->separate_debug_objfile_backlink = parent; | |
515 | objfile->separate_debug_objfile_link = parent->separate_debug_objfile; | |
516 | parent->separate_debug_objfile = objfile; | |
517 | ||
518 | /* Put the separate debug object before the normal one, this is so that | |
0df8b418 | 519 | usage of the ALL_OBJFILES_SAFE macro will stay safe. */ |
15d123c9 TG |
520 | put_objfile_before (objfile, parent); |
521 | } | |
522 | ||
523 | /* Free all separate debug objfile of OBJFILE, but don't free OBJFILE | |
524 | itself. */ | |
525 | ||
526 | void | |
527 | free_objfile_separate_debug (struct objfile *objfile) | |
528 | { | |
529 | struct objfile *child; | |
530 | ||
531 | for (child = objfile->separate_debug_objfile; child;) | |
532 | { | |
533 | struct objfile *next_child = child->separate_debug_objfile_link; | |
534 | free_objfile (child); | |
535 | child = next_child; | |
536 | } | |
537 | } | |
c906108c | 538 | |
7580e917 | 539 | /* Destroy an objfile and all the symtabs and psymtabs under it. */ |
c906108c SS |
540 | |
541 | void | |
fba45db2 | 542 | free_objfile (struct objfile *objfile) |
c906108c | 543 | { |
63644780 NB |
544 | /* First notify observers that this objfile is about to be freed. */ |
545 | observer_notify_free_objfile (objfile); | |
546 | ||
15d123c9 TG |
547 | /* Free all separate debug objfiles. */ |
548 | free_objfile_separate_debug (objfile); | |
549 | ||
5b5d99cf JB |
550 | if (objfile->separate_debug_objfile_backlink) |
551 | { | |
552 | /* We freed the separate debug file, make sure the base objfile | |
553 | doesn't reference it. */ | |
15d123c9 TG |
554 | struct objfile *child; |
555 | ||
556 | child = objfile->separate_debug_objfile_backlink->separate_debug_objfile; | |
557 | ||
558 | if (child == objfile) | |
559 | { | |
560 | /* OBJFILE is the first child. */ | |
561 | objfile->separate_debug_objfile_backlink->separate_debug_objfile = | |
562 | objfile->separate_debug_objfile_link; | |
563 | } | |
564 | else | |
565 | { | |
566 | /* Find OBJFILE in the list. */ | |
567 | while (1) | |
568 | { | |
569 | if (child->separate_debug_objfile_link == objfile) | |
570 | { | |
571 | child->separate_debug_objfile_link = | |
572 | objfile->separate_debug_objfile_link; | |
573 | break; | |
574 | } | |
575 | child = child->separate_debug_objfile_link; | |
576 | gdb_assert (child); | |
577 | } | |
578 | } | |
5b5d99cf JB |
579 | } |
580 | ||
ae5a43e0 DJ |
581 | /* Remove any references to this objfile in the global value |
582 | lists. */ | |
583 | preserve_values (objfile); | |
584 | ||
9f743ef6 JK |
585 | /* It still may reference data modules have associated with the objfile and |
586 | the symbol file data. */ | |
587 | forget_cached_source_info_for_objfile (objfile); | |
588 | ||
2f202fde | 589 | breakpoint_free_objfile (objfile); |
afedecd3 | 590 | btrace_free_objfile (objfile); |
2f202fde | 591 | |
c906108c SS |
592 | /* First do any symbol file specific actions required when we are |
593 | finished with a particular symbol file. Note that if the objfile | |
594 | is using reusable symbol information (via mmalloc) then each of | |
595 | these routines is responsible for doing the correct thing, either | |
596 | freeing things which are valid only during this particular gdb | |
0df8b418 | 597 | execution, or leaving them to be reused during the next one. */ |
c906108c | 598 | |
c5aa993b | 599 | if (objfile->sf != NULL) |
c906108c | 600 | { |
c5aa993b | 601 | (*objfile->sf->sym_finish) (objfile); |
c906108c SS |
602 | } |
603 | ||
9f743ef6 JK |
604 | /* Discard any data modules have associated with the objfile. The function |
605 | still may reference objfile->obfd. */ | |
c5bc3a77 DJ |
606 | objfile_free_data (objfile); |
607 | ||
706e3705 TT |
608 | if (objfile->obfd) |
609 | gdb_bfd_unref (objfile->obfd); | |
610 | else | |
611 | free_objfile_per_bfd_storage (objfile->per_bfd); | |
c906108c | 612 | |
0df8b418 | 613 | /* Remove it from the chain of all objfiles. */ |
c906108c SS |
614 | |
615 | unlink_objfile (objfile); | |
616 | ||
adb7f338 JK |
617 | if (objfile == symfile_objfile) |
618 | symfile_objfile = NULL; | |
c906108c | 619 | |
c906108c SS |
620 | /* Before the symbol table code was redone to make it easier to |
621 | selectively load and remove information particular to a specific | |
622 | linkage unit, gdb used to do these things whenever the monolithic | |
623 | symbol table was blown away. How much still needs to be done | |
624 | is unknown, but we play it safe for now and keep each action until | |
0df8b418 | 625 | it is shown to be no longer needed. */ |
c5aa993b | 626 | |
cb5d864f FF |
627 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
628 | for example), so we need to call this here. */ | |
c906108c SS |
629 | clear_pc_function_cache (); |
630 | ||
9bdcbae7 DJ |
631 | /* Clear globals which might have pointed into a removed objfile. |
632 | FIXME: It's not clear which of these are supposed to persist | |
633 | between expressions and which ought to be reset each time. */ | |
634 | expression_context_block = NULL; | |
635 | innermost_block = NULL; | |
636 | ||
cb5d864f | 637 | /* Check to see if the current_source_symtab belongs to this objfile, |
0df8b418 | 638 | and if so, call clear_current_source_symtab_and_line. */ |
cb5d864f FF |
639 | |
640 | { | |
641 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
cb5d864f | 642 | |
00174a86 TT |
643 | if (cursal.symtab && cursal.symtab->objfile == objfile) |
644 | clear_current_source_symtab_and_line (); | |
cb5d864f FF |
645 | } |
646 | ||
78a4a9b9 | 647 | if (objfile->global_psymbols.list) |
2dc74dc1 | 648 | xfree (objfile->global_psymbols.list); |
78a4a9b9 | 649 | if (objfile->static_psymbols.list) |
2dc74dc1 | 650 | xfree (objfile->static_psymbols.list); |
0df8b418 | 651 | /* Free the obstacks for non-reusable objfiles. */ |
710e1a31 | 652 | psymbol_bcache_free (objfile->psymbol_cache); |
b99607ea | 653 | obstack_free (&objfile->objfile_obstack, 0); |
6c95b8df PA |
654 | |
655 | /* Rebuild section map next time we need it. */ | |
607ece04 | 656 | get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1; |
6c95b8df | 657 | |
020f7036 | 658 | /* The last thing we do is free the objfile struct itself. */ |
2dc74dc1 | 659 | xfree (objfile); |
c906108c SS |
660 | } |
661 | ||
74b7792f AC |
662 | static void |
663 | do_free_objfile_cleanup (void *obj) | |
664 | { | |
665 | free_objfile (obj); | |
666 | } | |
667 | ||
668 | struct cleanup * | |
669 | make_cleanup_free_objfile (struct objfile *obj) | |
670 | { | |
671 | return make_cleanup (do_free_objfile_cleanup, obj); | |
672 | } | |
c906108c SS |
673 | |
674 | /* Free all the object files at once and clean up their users. */ | |
675 | ||
676 | void | |
fba45db2 | 677 | free_all_objfiles (void) |
c906108c SS |
678 | { |
679 | struct objfile *objfile, *temp; | |
0133421a JK |
680 | struct so_list *so; |
681 | ||
682 | /* Any objfile referencewould become stale. */ | |
683 | for (so = master_so_list (); so; so = so->next) | |
684 | gdb_assert (so->objfile == NULL); | |
c906108c SS |
685 | |
686 | ALL_OBJFILES_SAFE (objfile, temp) | |
c5aa993b JM |
687 | { |
688 | free_objfile (objfile); | |
689 | } | |
c1e56572 | 690 | clear_symtab_users (0); |
c906108c SS |
691 | } |
692 | \f | |
34eaf542 TT |
693 | /* A helper function for objfile_relocate1 that relocates a single |
694 | symbol. */ | |
695 | ||
696 | static void | |
697 | relocate_one_symbol (struct symbol *sym, struct objfile *objfile, | |
698 | struct section_offsets *delta) | |
699 | { | |
700 | fixup_symbol_section (sym, objfile); | |
701 | ||
702 | /* The RS6000 code from which this was taken skipped | |
703 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. | |
704 | But I'm leaving out that test, on the theory that | |
705 | they can't possibly pass the tests below. */ | |
706 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
707 | || SYMBOL_CLASS (sym) == LOC_STATIC) | |
708 | && SYMBOL_SECTION (sym) >= 0) | |
709 | { | |
710 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
711 | } | |
712 | } | |
713 | ||
c906108c | 714 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS |
b260e109 JK |
715 | entries in new_offsets. SEPARATE_DEBUG_OBJFILE is not touched here. |
716 | Return non-zero iff any change happened. */ | |
567995e1 | 717 | |
b260e109 | 718 | static int |
5cc80db3 | 719 | objfile_relocate1 (struct objfile *objfile, |
3189cb12 | 720 | const struct section_offsets *new_offsets) |
c906108c | 721 | { |
30510692 | 722 | struct obj_section *s; |
d4f3574e | 723 | struct section_offsets *delta = |
a39a16c4 MM |
724 | ((struct section_offsets *) |
725 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
c906108c | 726 | |
5cc80db3 MS |
727 | int i; |
728 | int something_changed = 0; | |
729 | ||
730 | for (i = 0; i < objfile->num_sections; ++i) | |
731 | { | |
732 | delta->offsets[i] = | |
733 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); | |
734 | if (ANOFFSET (delta, i) != 0) | |
735 | something_changed = 1; | |
736 | } | |
737 | if (!something_changed) | |
738 | return 0; | |
c906108c SS |
739 | |
740 | /* OK, get all the symtabs. */ | |
741 | { | |
742 | struct symtab *s; | |
743 | ||
744 | ALL_OBJFILE_SYMTABS (objfile, s) | |
c5aa993b JM |
745 | { |
746 | struct linetable *l; | |
346d1dfe | 747 | const struct blockvector *bv; |
c5aa993b JM |
748 | int i; |
749 | ||
750 | /* First the line table. */ | |
751 | l = LINETABLE (s); | |
752 | if (l) | |
753 | { | |
754 | for (i = 0; i < l->nitems; ++i) | |
755 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
756 | } | |
c906108c | 757 | |
c5aa993b JM |
758 | /* Don't relocate a shared blockvector more than once. */ |
759 | if (!s->primary) | |
760 | continue; | |
c906108c | 761 | |
c5aa993b | 762 | bv = BLOCKVECTOR (s); |
b101f7a1 UW |
763 | if (BLOCKVECTOR_MAP (bv)) |
764 | addrmap_relocate (BLOCKVECTOR_MAP (bv), | |
765 | ANOFFSET (delta, s->block_line_section)); | |
766 | ||
c5aa993b JM |
767 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) |
768 | { | |
769 | struct block *b; | |
e88c90f2 | 770 | struct symbol *sym; |
de4f826b | 771 | struct dict_iterator iter; |
c5aa993b JM |
772 | |
773 | b = BLOCKVECTOR_BLOCK (bv, i); | |
774 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
775 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
776 | ||
8157b174 TT |
777 | /* We only want to iterate over the local symbols, not any |
778 | symbols in included symtabs. */ | |
779 | ALL_DICT_SYMBOLS (BLOCK_DICT (b), iter, sym) | |
c5aa993b | 780 | { |
34eaf542 | 781 | relocate_one_symbol (sym, objfile, delta); |
c5aa993b JM |
782 | } |
783 | } | |
784 | } | |
c906108c SS |
785 | } |
786 | ||
34eaf542 TT |
787 | /* Relocate isolated symbols. */ |
788 | { | |
789 | struct symbol *iter; | |
790 | ||
791 | for (iter = objfile->template_symbols; iter; iter = iter->hash_next) | |
792 | relocate_one_symbol (iter, objfile, delta); | |
793 | } | |
794 | ||
9b14d7aa JK |
795 | if (objfile->psymtabs_addrmap) |
796 | addrmap_relocate (objfile->psymtabs_addrmap, | |
797 | ANOFFSET (delta, SECT_OFF_TEXT (objfile))); | |
798 | ||
ccefe4c4 TT |
799 | if (objfile->sf) |
800 | objfile->sf->qf->relocate (objfile, new_offsets, delta); | |
c906108c | 801 | |
f1f2b5f4 PA |
802 | { |
803 | int i; | |
5cc80db3 | 804 | |
f1f2b5f4 PA |
805 | for (i = 0; i < objfile->num_sections; ++i) |
806 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); | |
807 | } | |
808 | ||
809 | /* Rebuild section map next time we need it. */ | |
607ece04 | 810 | get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1; |
f1f2b5f4 | 811 | |
30510692 DJ |
812 | /* Update the table in exec_ops, used to read memory. */ |
813 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
814 | { | |
65cf3563 | 815 | int idx = s - objfile->sections; |
30510692 DJ |
816 | |
817 | exec_set_section_address (bfd_get_filename (objfile->obfd), idx, | |
f1f6aadf | 818 | obj_section_addr (s)); |
30510692 | 819 | } |
b260e109 JK |
820 | |
821 | /* Data changed. */ | |
822 | return 1; | |
567995e1 JK |
823 | } |
824 | ||
825 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
826 | entries in new_offsets. Process also OBJFILE's SEPARATE_DEBUG_OBJFILEs. | |
827 | ||
828 | The number and ordering of sections does differ between the two objfiles. | |
829 | Only their names match. Also the file offsets will differ (objfile being | |
830 | possibly prelinked but separate_debug_objfile is probably not prelinked) but | |
831 | the in-memory absolute address as specified by NEW_OFFSETS must match both | |
832 | files. */ | |
833 | ||
834 | void | |
3189cb12 DE |
835 | objfile_relocate (struct objfile *objfile, |
836 | const struct section_offsets *new_offsets) | |
567995e1 JK |
837 | { |
838 | struct objfile *debug_objfile; | |
b260e109 | 839 | int changed = 0; |
567995e1 | 840 | |
b260e109 | 841 | changed |= objfile_relocate1 (objfile, new_offsets); |
567995e1 JK |
842 | |
843 | for (debug_objfile = objfile->separate_debug_objfile; | |
844 | debug_objfile; | |
845 | debug_objfile = objfile_separate_debug_iterate (objfile, debug_objfile)) | |
846 | { | |
847 | struct section_addr_info *objfile_addrs; | |
848 | struct section_offsets *new_debug_offsets; | |
567995e1 JK |
849 | struct cleanup *my_cleanups; |
850 | ||
851 | objfile_addrs = build_section_addr_info_from_objfile (objfile); | |
852 | my_cleanups = make_cleanup (xfree, objfile_addrs); | |
853 | ||
854 | /* Here OBJFILE_ADDRS contain the correct absolute addresses, the | |
855 | relative ones must be already created according to debug_objfile. */ | |
856 | ||
857 | addr_info_make_relative (objfile_addrs, debug_objfile->obfd); | |
858 | ||
859 | gdb_assert (debug_objfile->num_sections | |
d445b2f6 | 860 | == gdb_bfd_count_sections (debug_objfile->obfd)); |
4fc06681 MS |
861 | new_debug_offsets = |
862 | xmalloc (SIZEOF_N_SECTION_OFFSETS (debug_objfile->num_sections)); | |
567995e1 JK |
863 | make_cleanup (xfree, new_debug_offsets); |
864 | relative_addr_info_to_section_offsets (new_debug_offsets, | |
865 | debug_objfile->num_sections, | |
866 | objfile_addrs); | |
867 | ||
b260e109 | 868 | changed |= objfile_relocate1 (debug_objfile, new_debug_offsets); |
567995e1 JK |
869 | |
870 | do_cleanups (my_cleanups); | |
871 | } | |
30510692 | 872 | |
0df8b418 | 873 | /* Relocate breakpoints as necessary, after things are relocated. */ |
b260e109 JK |
874 | if (changed) |
875 | breakpoint_re_set (); | |
c906108c | 876 | } |
4141a416 JB |
877 | |
878 | /* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is | |
879 | not touched here. | |
880 | Return non-zero iff any change happened. */ | |
881 | ||
882 | static int | |
883 | objfile_rebase1 (struct objfile *objfile, CORE_ADDR slide) | |
884 | { | |
885 | struct section_offsets *new_offsets = | |
886 | ((struct section_offsets *) | |
887 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
888 | int i; | |
889 | ||
890 | for (i = 0; i < objfile->num_sections; ++i) | |
891 | new_offsets->offsets[i] = slide; | |
892 | ||
893 | return objfile_relocate1 (objfile, new_offsets); | |
894 | } | |
895 | ||
896 | /* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's | |
897 | SEPARATE_DEBUG_OBJFILEs. */ | |
898 | ||
899 | void | |
900 | objfile_rebase (struct objfile *objfile, CORE_ADDR slide) | |
901 | { | |
902 | struct objfile *debug_objfile; | |
903 | int changed = 0; | |
904 | ||
905 | changed |= objfile_rebase1 (objfile, slide); | |
906 | ||
907 | for (debug_objfile = objfile->separate_debug_objfile; | |
908 | debug_objfile; | |
909 | debug_objfile = objfile_separate_debug_iterate (objfile, debug_objfile)) | |
910 | changed |= objfile_rebase1 (debug_objfile, slide); | |
911 | ||
912 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
913 | if (changed) | |
914 | breakpoint_re_set (); | |
915 | } | |
c906108c | 916 | \f |
55333a84 DE |
917 | /* Return non-zero if OBJFILE has partial symbols. */ |
918 | ||
919 | int | |
920 | objfile_has_partial_symbols (struct objfile *objfile) | |
921 | { | |
b11896a5 TT |
922 | if (!objfile->sf) |
923 | return 0; | |
3e03848b JK |
924 | |
925 | /* If we have not read psymbols, but we have a function capable of reading | |
926 | them, then that is an indication that they are in fact available. Without | |
927 | this function the symbols may have been already read in but they also may | |
928 | not be present in this objfile. */ | |
929 | if ((objfile->flags & OBJF_PSYMTABS_READ) == 0 | |
930 | && objfile->sf->sym_read_psymbols != NULL) | |
931 | return 1; | |
932 | ||
b11896a5 | 933 | return objfile->sf->qf->has_symbols (objfile); |
55333a84 DE |
934 | } |
935 | ||
936 | /* Return non-zero if OBJFILE has full symbols. */ | |
937 | ||
938 | int | |
939 | objfile_has_full_symbols (struct objfile *objfile) | |
940 | { | |
941 | return objfile->symtabs != NULL; | |
942 | } | |
943 | ||
e361b228 | 944 | /* Return non-zero if OBJFILE has full or partial symbols, either directly |
15d123c9 | 945 | or through a separate debug file. */ |
e361b228 TG |
946 | |
947 | int | |
948 | objfile_has_symbols (struct objfile *objfile) | |
949 | { | |
15d123c9 | 950 | struct objfile *o; |
e361b228 | 951 | |
15d123c9 TG |
952 | for (o = objfile; o; o = objfile_separate_debug_iterate (objfile, o)) |
953 | if (objfile_has_partial_symbols (o) || objfile_has_full_symbols (o)) | |
954 | return 1; | |
e361b228 TG |
955 | return 0; |
956 | } | |
957 | ||
958 | ||
c906108c SS |
959 | /* Many places in gdb want to test just to see if we have any partial |
960 | symbols available. This function returns zero if none are currently | |
0df8b418 | 961 | available, nonzero otherwise. */ |
c906108c SS |
962 | |
963 | int | |
fba45db2 | 964 | have_partial_symbols (void) |
c906108c SS |
965 | { |
966 | struct objfile *ofp; | |
967 | ||
968 | ALL_OBJFILES (ofp) | |
c5aa993b | 969 | { |
55333a84 DE |
970 | if (objfile_has_partial_symbols (ofp)) |
971 | return 1; | |
c5aa993b | 972 | } |
c906108c SS |
973 | return 0; |
974 | } | |
975 | ||
976 | /* Many places in gdb want to test just to see if we have any full | |
977 | symbols available. This function returns zero if none are currently | |
0df8b418 | 978 | available, nonzero otherwise. */ |
c906108c SS |
979 | |
980 | int | |
fba45db2 | 981 | have_full_symbols (void) |
c906108c SS |
982 | { |
983 | struct objfile *ofp; | |
984 | ||
985 | ALL_OBJFILES (ofp) | |
c5aa993b | 986 | { |
55333a84 DE |
987 | if (objfile_has_full_symbols (ofp)) |
988 | return 1; | |
c5aa993b | 989 | } |
c906108c SS |
990 | return 0; |
991 | } | |
992 | ||
993 | ||
994 | /* This operations deletes all objfile entries that represent solibs that | |
995 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
0df8b418 MS |
996 | command. */ |
997 | ||
c906108c | 998 | void |
fba45db2 | 999 | objfile_purge_solibs (void) |
c906108c | 1000 | { |
c5aa993b JM |
1001 | struct objfile *objf; |
1002 | struct objfile *temp; | |
c906108c SS |
1003 | |
1004 | ALL_OBJFILES_SAFE (objf, temp) | |
1005 | { | |
1006 | /* We assume that the solib package has been purged already, or will | |
0df8b418 MS |
1007 | be soon. */ |
1008 | ||
2df3850c | 1009 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
c906108c SS |
1010 | free_objfile (objf); |
1011 | } | |
1012 | } | |
1013 | ||
1014 | ||
1015 | /* Many places in gdb want to test just to see if we have any minimal | |
1016 | symbols available. This function returns zero if none are currently | |
0df8b418 | 1017 | available, nonzero otherwise. */ |
c906108c SS |
1018 | |
1019 | int | |
fba45db2 | 1020 | have_minimal_symbols (void) |
c906108c SS |
1021 | { |
1022 | struct objfile *ofp; | |
1023 | ||
1024 | ALL_OBJFILES (ofp) | |
c5aa993b | 1025 | { |
34643a32 | 1026 | if (ofp->per_bfd->minimal_symbol_count > 0) |
c5aa993b JM |
1027 | { |
1028 | return 1; | |
1029 | } | |
1030 | } | |
c906108c SS |
1031 | return 0; |
1032 | } | |
1033 | ||
a845f5cb PP |
1034 | /* Qsort comparison function. */ |
1035 | ||
1036 | static int | |
1037 | qsort_cmp (const void *a, const void *b) | |
1038 | { | |
1039 | const struct obj_section *sect1 = *(const struct obj_section **) a; | |
1040 | const struct obj_section *sect2 = *(const struct obj_section **) b; | |
1041 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1042 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1043 | ||
1044 | if (sect1_addr < sect2_addr) | |
6fbf07cd | 1045 | return -1; |
a845f5cb | 1046 | else if (sect1_addr > sect2_addr) |
6fbf07cd PP |
1047 | return 1; |
1048 | else | |
5cc80db3 MS |
1049 | { |
1050 | /* Sections are at the same address. This could happen if | |
1051 | A) we have an objfile and a separate debuginfo. | |
1052 | B) we are confused, and have added sections without proper relocation, | |
0df8b418 | 1053 | or something like that. */ |
5cc80db3 MS |
1054 | |
1055 | const struct objfile *const objfile1 = sect1->objfile; | |
1056 | const struct objfile *const objfile2 = sect2->objfile; | |
1057 | ||
1058 | if (objfile1->separate_debug_objfile == objfile2 | |
1059 | || objfile2->separate_debug_objfile == objfile1) | |
1060 | { | |
1061 | /* Case A. The ordering doesn't matter: separate debuginfo files | |
1062 | will be filtered out later. */ | |
1063 | ||
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | /* Case B. Maintain stable sort order, so bugs in GDB are easier to | |
1068 | triage. This section could be slow (since we iterate over all | |
1069 | objfiles in each call to qsort_cmp), but this shouldn't happen | |
1070 | very often (GDB is already in a confused state; one hopes this | |
1071 | doesn't happen at all). If you discover that significant time is | |
1072 | spent in the loops below, do 'set complaints 100' and examine the | |
1073 | resulting complaints. */ | |
1074 | ||
1075 | if (objfile1 == objfile2) | |
1076 | { | |
1077 | /* Both sections came from the same objfile. We are really confused. | |
1078 | Sort on sequence order of sections within the objfile. */ | |
1079 | ||
1080 | const struct obj_section *osect; | |
1081 | ||
1082 | ALL_OBJFILE_OSECTIONS (objfile1, osect) | |
1083 | if (osect == sect1) | |
1084 | return -1; | |
1085 | else if (osect == sect2) | |
1086 | return 1; | |
1087 | ||
1088 | /* We should have found one of the sections before getting here. */ | |
f3574227 | 1089 | gdb_assert_not_reached ("section not found"); |
5cc80db3 MS |
1090 | } |
1091 | else | |
1092 | { | |
1093 | /* Sort on sequence number of the objfile in the chain. */ | |
1094 | ||
1095 | const struct objfile *objfile; | |
1096 | ||
1097 | ALL_OBJFILES (objfile) | |
1098 | if (objfile == objfile1) | |
1099 | return -1; | |
1100 | else if (objfile == objfile2) | |
1101 | return 1; | |
1102 | ||
1103 | /* We should have found one of the objfiles before getting here. */ | |
f3574227 | 1104 | gdb_assert_not_reached ("objfile not found"); |
5cc80db3 MS |
1105 | } |
1106 | } | |
6fbf07cd PP |
1107 | |
1108 | /* Unreachable. */ | |
f3574227 | 1109 | gdb_assert_not_reached ("unexpected code path"); |
a845f5cb PP |
1110 | return 0; |
1111 | } | |
1112 | ||
3aad21cf PP |
1113 | /* Select "better" obj_section to keep. We prefer the one that came from |
1114 | the real object, rather than the one from separate debuginfo. | |
1115 | Most of the time the two sections are exactly identical, but with | |
1116 | prelinking the .rel.dyn section in the real object may have different | |
1117 | size. */ | |
1118 | ||
1119 | static struct obj_section * | |
1120 | preferred_obj_section (struct obj_section *a, struct obj_section *b) | |
1121 | { | |
1122 | gdb_assert (obj_section_addr (a) == obj_section_addr (b)); | |
1123 | gdb_assert ((a->objfile->separate_debug_objfile == b->objfile) | |
1124 | || (b->objfile->separate_debug_objfile == a->objfile)); | |
1125 | gdb_assert ((a->objfile->separate_debug_objfile_backlink == b->objfile) | |
1126 | || (b->objfile->separate_debug_objfile_backlink == a->objfile)); | |
1127 | ||
1128 | if (a->objfile->separate_debug_objfile != NULL) | |
1129 | return a; | |
1130 | return b; | |
1131 | } | |
1132 | ||
6fbf07cd PP |
1133 | /* Return 1 if SECTION should be inserted into the section map. |
1134 | We want to insert only non-overlay and non-TLS section. */ | |
1135 | ||
1136 | static int | |
1137 | insert_section_p (const struct bfd *abfd, | |
1138 | const struct bfd_section *section) | |
1139 | { | |
1140 | const bfd_vma lma = bfd_section_lma (abfd, section); | |
1141 | ||
50f8ea94 | 1142 | if (overlay_debugging && lma != 0 && lma != bfd_section_vma (abfd, section) |
6fbf07cd PP |
1143 | && (bfd_get_file_flags (abfd) & BFD_IN_MEMORY) == 0) |
1144 | /* This is an overlay section. IN_MEMORY check is needed to avoid | |
1145 | discarding sections from the "system supplied DSO" (aka vdso) | |
1146 | on some Linux systems (e.g. Fedora 11). */ | |
1147 | return 0; | |
1148 | if ((bfd_get_section_flags (abfd, section) & SEC_THREAD_LOCAL) != 0) | |
1149 | /* This is a TLS section. */ | |
1150 | return 0; | |
1151 | ||
1152 | return 1; | |
1153 | } | |
1154 | ||
1155 | /* Filter out overlapping sections where one section came from the real | |
1156 | objfile, and the other from a separate debuginfo file. | |
1157 | Return the size of table after redundant sections have been eliminated. */ | |
1158 | ||
1159 | static int | |
1160 | filter_debuginfo_sections (struct obj_section **map, int map_size) | |
1161 | { | |
1162 | int i, j; | |
1163 | ||
1164 | for (i = 0, j = 0; i < map_size - 1; i++) | |
1165 | { | |
1166 | struct obj_section *const sect1 = map[i]; | |
1167 | struct obj_section *const sect2 = map[i + 1]; | |
1168 | const struct objfile *const objfile1 = sect1->objfile; | |
1169 | const struct objfile *const objfile2 = sect2->objfile; | |
1170 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1171 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1172 | ||
1173 | if (sect1_addr == sect2_addr | |
1174 | && (objfile1->separate_debug_objfile == objfile2 | |
1175 | || objfile2->separate_debug_objfile == objfile1)) | |
1176 | { | |
1177 | map[j++] = preferred_obj_section (sect1, sect2); | |
1178 | ++i; | |
1179 | } | |
1180 | else | |
1181 | map[j++] = sect1; | |
1182 | } | |
1183 | ||
1184 | if (i < map_size) | |
1185 | { | |
1186 | gdb_assert (i == map_size - 1); | |
1187 | map[j++] = map[i]; | |
1188 | } | |
1189 | ||
1190 | /* The map should not have shrunk to less than half the original size. */ | |
1191 | gdb_assert (map_size / 2 <= j); | |
1192 | ||
1193 | return j; | |
1194 | } | |
1195 | ||
1196 | /* Filter out overlapping sections, issuing a warning if any are found. | |
1197 | Overlapping sections could really be overlay sections which we didn't | |
1198 | classify as such in insert_section_p, or we could be dealing with a | |
1199 | corrupt binary. */ | |
1200 | ||
1201 | static int | |
1202 | filter_overlapping_sections (struct obj_section **map, int map_size) | |
1203 | { | |
1204 | int i, j; | |
1205 | ||
1206 | for (i = 0, j = 0; i < map_size - 1; ) | |
1207 | { | |
1208 | int k; | |
1209 | ||
1210 | map[j++] = map[i]; | |
1211 | for (k = i + 1; k < map_size; k++) | |
1212 | { | |
1213 | struct obj_section *const sect1 = map[i]; | |
1214 | struct obj_section *const sect2 = map[k]; | |
1215 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1216 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1217 | const CORE_ADDR sect1_endaddr = obj_section_endaddr (sect1); | |
1218 | ||
1219 | gdb_assert (sect1_addr <= sect2_addr); | |
1220 | ||
1221 | if (sect1_endaddr <= sect2_addr) | |
1222 | break; | |
1223 | else | |
1224 | { | |
1225 | /* We have an overlap. Report it. */ | |
1226 | ||
1227 | struct objfile *const objf1 = sect1->objfile; | |
1228 | struct objfile *const objf2 = sect2->objfile; | |
1229 | ||
6fbf07cd PP |
1230 | const struct bfd_section *const bfds1 = sect1->the_bfd_section; |
1231 | const struct bfd_section *const bfds2 = sect2->the_bfd_section; | |
1232 | ||
1233 | const CORE_ADDR sect2_endaddr = obj_section_endaddr (sect2); | |
1234 | ||
1235 | struct gdbarch *const gdbarch = get_objfile_arch (objf1); | |
1236 | ||
1237 | complaint (&symfile_complaints, | |
1238 | _("unexpected overlap between:\n" | |
1239 | " (A) section `%s' from `%s' [%s, %s)\n" | |
1240 | " (B) section `%s' from `%s' [%s, %s).\n" | |
1241 | "Will ignore section B"), | |
4262abfb | 1242 | bfd_section_name (abfd1, bfds1), objfile_name (objf1), |
6fbf07cd PP |
1243 | paddress (gdbarch, sect1_addr), |
1244 | paddress (gdbarch, sect1_endaddr), | |
4262abfb | 1245 | bfd_section_name (abfd2, bfds2), objfile_name (objf2), |
6fbf07cd PP |
1246 | paddress (gdbarch, sect2_addr), |
1247 | paddress (gdbarch, sect2_endaddr)); | |
1248 | } | |
1249 | } | |
1250 | i = k; | |
1251 | } | |
1252 | ||
1253 | if (i < map_size) | |
1254 | { | |
1255 | gdb_assert (i == map_size - 1); | |
1256 | map[j++] = map[i]; | |
1257 | } | |
1258 | ||
1259 | return j; | |
1260 | } | |
1261 | ||
1262 | ||
1263 | /* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any | |
1264 | TLS, overlay and overlapping sections. */ | |
a845f5cb PP |
1265 | |
1266 | static void | |
6c95b8df PA |
1267 | update_section_map (struct program_space *pspace, |
1268 | struct obj_section ***pmap, int *pmap_size) | |
a845f5cb | 1269 | { |
607ece04 | 1270 | struct objfile_pspace_info *pspace_info; |
6fbf07cd | 1271 | int alloc_size, map_size, i; |
a845f5cb PP |
1272 | struct obj_section *s, **map; |
1273 | struct objfile *objfile; | |
1274 | ||
607ece04 GB |
1275 | pspace_info = get_objfile_pspace_data (pspace); |
1276 | gdb_assert (pspace_info->section_map_dirty != 0 | |
1277 | || pspace_info->new_objfiles_available != 0); | |
a845f5cb PP |
1278 | |
1279 | map = *pmap; | |
1280 | xfree (map); | |
1281 | ||
6fbf07cd | 1282 | alloc_size = 0; |
6c95b8df PA |
1283 | ALL_PSPACE_OBJFILES (pspace, objfile) |
1284 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
1285 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1286 | alloc_size += 1; | |
a845f5cb | 1287 | |
65a97ab3 PP |
1288 | /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */ |
1289 | if (alloc_size == 0) | |
1290 | { | |
1291 | *pmap = NULL; | |
1292 | *pmap_size = 0; | |
1293 | return; | |
1294 | } | |
1295 | ||
6fbf07cd | 1296 | map = xmalloc (alloc_size * sizeof (*map)); |
a845f5cb | 1297 | |
3aad21cf | 1298 | i = 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 | map[i++] = s; | |
a845f5cb | 1303 | |
6fbf07cd PP |
1304 | qsort (map, alloc_size, sizeof (*map), qsort_cmp); |
1305 | map_size = filter_debuginfo_sections(map, alloc_size); | |
1306 | map_size = filter_overlapping_sections(map, map_size); | |
a845f5cb | 1307 | |
6fbf07cd PP |
1308 | if (map_size < alloc_size) |
1309 | /* Some sections were eliminated. Trim excess space. */ | |
1310 | map = xrealloc (map, map_size * sizeof (*map)); | |
3aad21cf | 1311 | else |
6fbf07cd | 1312 | gdb_assert (alloc_size == map_size); |
3aad21cf | 1313 | |
a845f5cb PP |
1314 | *pmap = map; |
1315 | *pmap_size = map_size; | |
1316 | } | |
1317 | ||
0df8b418 | 1318 | /* Bsearch comparison function. */ |
a845f5cb PP |
1319 | |
1320 | static int | |
1321 | bsearch_cmp (const void *key, const void *elt) | |
1322 | { | |
1323 | const CORE_ADDR pc = *(CORE_ADDR *) key; | |
1324 | const struct obj_section *section = *(const struct obj_section **) elt; | |
1325 | ||
1326 | if (pc < obj_section_addr (section)) | |
1327 | return -1; | |
1328 | if (pc < obj_section_endaddr (section)) | |
1329 | return 0; | |
1330 | return 1; | |
1331 | } | |
1332 | ||
714835d5 | 1333 | /* Returns a section whose range includes PC or NULL if none found. */ |
c906108c SS |
1334 | |
1335 | struct obj_section * | |
714835d5 | 1336 | find_pc_section (CORE_ADDR pc) |
c906108c | 1337 | { |
6c95b8df | 1338 | struct objfile_pspace_info *pspace_info; |
a845f5cb | 1339 | struct obj_section *s, **sp; |
c5aa993b | 1340 | |
714835d5 UW |
1341 | /* Check for mapped overlay section first. */ |
1342 | s = find_pc_mapped_section (pc); | |
1343 | if (s) | |
1344 | return s; | |
c906108c | 1345 | |
6c95b8df | 1346 | pspace_info = get_objfile_pspace_data (current_program_space); |
607ece04 GB |
1347 | if (pspace_info->section_map_dirty |
1348 | || (pspace_info->new_objfiles_available | |
1349 | && !pspace_info->inhibit_updates)) | |
a845f5cb | 1350 | { |
6c95b8df PA |
1351 | update_section_map (current_program_space, |
1352 | &pspace_info->sections, | |
1353 | &pspace_info->num_sections); | |
c906108c | 1354 | |
6c95b8df PA |
1355 | /* Don't need updates to section map until objfiles are added, |
1356 | removed or relocated. */ | |
607ece04 GB |
1357 | pspace_info->new_objfiles_available = 0; |
1358 | pspace_info->section_map_dirty = 0; | |
a845f5cb PP |
1359 | } |
1360 | ||
65a97ab3 PP |
1361 | /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to |
1362 | bsearch be non-NULL. */ | |
1363 | if (pspace_info->sections == NULL) | |
1364 | { | |
1365 | gdb_assert (pspace_info->num_sections == 0); | |
1366 | return NULL; | |
1367 | } | |
1368 | ||
6c95b8df PA |
1369 | sp = (struct obj_section **) bsearch (&pc, |
1370 | pspace_info->sections, | |
1371 | pspace_info->num_sections, | |
1372 | sizeof (*pspace_info->sections), | |
1373 | bsearch_cmp); | |
a845f5cb PP |
1374 | if (sp != NULL) |
1375 | return *sp; | |
714835d5 | 1376 | return NULL; |
c906108c | 1377 | } |
c5aa993b | 1378 | |
c906108c | 1379 | |
3e5d3a5a | 1380 | /* Return non-zero if PC is in a section called NAME. */ |
c906108c SS |
1381 | |
1382 | int | |
3e5d3a5a | 1383 | pc_in_section (CORE_ADDR pc, char *name) |
c906108c SS |
1384 | { |
1385 | struct obj_section *s; | |
1386 | int retval = 0; | |
c5aa993b JM |
1387 | |
1388 | s = find_pc_section (pc); | |
1389 | ||
c906108c SS |
1390 | retval = (s != NULL |
1391 | && s->the_bfd_section->name != NULL | |
3e5d3a5a | 1392 | && strcmp (s->the_bfd_section->name, name) == 0); |
c5aa993b | 1393 | return (retval); |
c906108c | 1394 | } |
0d0e1a63 MK |
1395 | \f |
1396 | ||
607ece04 | 1397 | /* Set section_map_dirty so section map will be rebuilt next time it |
bb272892 | 1398 | is used. Called by reread_symbols. */ |
a845f5cb PP |
1399 | |
1400 | void | |
bb272892 | 1401 | objfiles_changed (void) |
a845f5cb | 1402 | { |
6c95b8df | 1403 | /* Rebuild section map next time we need it. */ |
607ece04 GB |
1404 | get_objfile_pspace_data (current_program_space)->section_map_dirty = 1; |
1405 | } | |
1406 | ||
1407 | /* See comments in objfiles.h. */ | |
1408 | ||
1409 | void | |
1410 | inhibit_section_map_updates (struct program_space *pspace) | |
1411 | { | |
1412 | get_objfile_pspace_data (pspace)->inhibit_updates = 1; | |
1413 | } | |
1414 | ||
1415 | /* See comments in objfiles.h. */ | |
1416 | ||
1417 | void | |
1418 | resume_section_map_updates (struct program_space *pspace) | |
1419 | { | |
1420 | get_objfile_pspace_data (pspace)->inhibit_updates = 0; | |
1421 | } | |
1422 | ||
1423 | /* See comments in objfiles.h. */ | |
1424 | ||
1425 | void | |
1426 | resume_section_map_updates_cleanup (void *arg) | |
1427 | { | |
1428 | resume_section_map_updates (arg); | |
a845f5cb | 1429 | } |
e3c69974 | 1430 | |
63644780 NB |
1431 | /* Return 1 if ADDR maps into one of the sections of OBJFILE and 0 |
1432 | otherwise. */ | |
1433 | ||
1434 | int | |
1435 | is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile) | |
1436 | { | |
1437 | struct obj_section *osect; | |
1438 | ||
1439 | if (objfile == NULL) | |
1440 | return 0; | |
1441 | ||
1442 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
1443 | { | |
1444 | if (section_is_overlay (osect) && !section_is_mapped (osect)) | |
1445 | continue; | |
1446 | ||
1447 | if (obj_section_addr (osect) <= addr | |
1448 | && addr < obj_section_endaddr (osect)) | |
1449 | return 1; | |
1450 | } | |
1451 | return 0; | |
1452 | } | |
1453 | ||
08351840 | 1454 | int |
d03de421 PA |
1455 | shared_objfile_contains_address_p (struct program_space *pspace, |
1456 | CORE_ADDR address) | |
08351840 PA |
1457 | { |
1458 | struct objfile *objfile; | |
1459 | ||
1460 | ALL_PSPACE_OBJFILES (pspace, objfile) | |
1461 | { | |
d03de421 | 1462 | if ((objfile->flags & OBJF_SHARED) != 0 |
08351840 PA |
1463 | && is_addr_in_objfile (address, objfile)) |
1464 | return 1; | |
1465 | } | |
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 | } |