]>
Commit | Line | Data |
---|---|---|
c906108c | 1 | /* GDB routines for manipulating objfiles. |
af5f3db6 | 2 | |
213516ef | 3 | Copyright (C) 1992-2023 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" | |
c906108c | 30 | #include "target.h" |
af5f3db6 | 31 | #include "bcache.h" |
9bdcbae7 DJ |
32 | #include "expression.h" |
33 | #include "parser-defs.h" | |
34 | ||
c906108c | 35 | #include <sys/types.h> |
53ce3c39 | 36 | #include <sys/stat.h> |
c906108c | 37 | #include <fcntl.h> |
bf31fd38 | 38 | #include "gdbsupport/gdb_obstack.h" |
2de7ced7 | 39 | #include "hashtab.h" |
c906108c | 40 | |
7a292a7a | 41 | #include "breakpoint.h" |
fe898f56 | 42 | #include "block.h" |
de4f826b | 43 | #include "dictionary.h" |
cb5d864f | 44 | #include "source.h" |
801e3a5b | 45 | #include "addrmap.h" |
5e2b427d | 46 | #include "arch-utils.h" |
30510692 | 47 | #include "exec.h" |
76727919 | 48 | #include "observable.h" |
6fbf07cd | 49 | #include "complaints.h" |
ccefe4c4 | 50 | #include "psymtab.h" |
0133421a | 51 | #include "solist.h" |
cbb099e8 | 52 | #include "gdb_bfd.h" |
afedecd3 | 53 | #include "btrace.h" |
268a13a5 | 54 | #include "gdbsupport/pathstuff.h" |
7a292a7a | 55 | |
d0801dd8 | 56 | #include <algorithm> |
cfe826d4 TT |
57 | #include <vector> |
58 | ||
c906108c | 59 | /* Externally visible variables that are owned by this module. |
0df8b418 | 60 | See declarations in objfile.h for more info. */ |
c906108c | 61 | |
6c95b8df PA |
62 | struct objfile_pspace_info |
63 | { | |
f6aa7436 TT |
64 | objfile_pspace_info () = default; |
65 | ~objfile_pspace_info (); | |
66 | ||
67 | struct obj_section **sections = nullptr; | |
68 | int num_sections = 0; | |
607ece04 GB |
69 | |
70 | /* Nonzero if object files have been added since the section map | |
71 | was last updated. */ | |
f6aa7436 | 72 | int new_objfiles_available = 0; |
607ece04 GB |
73 | |
74 | /* Nonzero if the section map MUST be updated before use. */ | |
f6aa7436 | 75 | int section_map_dirty = 0; |
607ece04 GB |
76 | |
77 | /* Nonzero if section map updates should be inhibited if possible. */ | |
f6aa7436 | 78 | int inhibit_updates = 0; |
6c95b8df PA |
79 | }; |
80 | ||
81 | /* Per-program-space data key. */ | |
08b8a139 | 82 | static const registry<program_space>::key<objfile_pspace_info> |
f6aa7436 | 83 | objfiles_pspace_data; |
6c95b8df | 84 | |
f6aa7436 | 85 | objfile_pspace_info::~objfile_pspace_info () |
6c95b8df | 86 | { |
f6aa7436 | 87 | xfree (sections); |
6c95b8df PA |
88 | } |
89 | ||
90 | /* Get the current svr4 data. If none is found yet, add it now. This | |
91 | function always returns a valid object. */ | |
92 | ||
93 | static struct objfile_pspace_info * | |
94 | get_objfile_pspace_data (struct program_space *pspace) | |
95 | { | |
96 | struct objfile_pspace_info *info; | |
97 | ||
f6aa7436 | 98 | info = objfiles_pspace_data.get (pspace); |
6c95b8df | 99 | if (info == NULL) |
f6aa7436 | 100 | info = objfiles_pspace_data.emplace (pspace); |
6c95b8df PA |
101 | |
102 | return info; | |
103 | } | |
104 | ||
706e3705 TT |
105 | \f |
106 | ||
107 | /* Per-BFD data key. */ | |
108 | ||
08b8a139 | 109 | static const registry<bfd>::key<objfile_per_bfd_storage> objfiles_bfd_data; |
706e3705 | 110 | |
d6797f46 TT |
111 | objfile_per_bfd_storage::~objfile_per_bfd_storage () |
112 | { | |
d6797f46 TT |
113 | } |
114 | ||
706e3705 TT |
115 | /* Create the per-BFD storage object for OBJFILE. If ABFD is not |
116 | NULL, and it already has a per-BFD storage object, use that. | |
9161c89a | 117 | Otherwise, allocate a new per-BFD storage object. */ |
706e3705 | 118 | |
88c4cce8 TT |
119 | void |
120 | set_objfile_per_bfd (struct objfile *objfile) | |
706e3705 | 121 | { |
88c4cce8 | 122 | bfd *abfd = objfile->obfd.get (); |
706e3705 TT |
123 | struct objfile_per_bfd_storage *storage = NULL; |
124 | ||
125 | if (abfd != NULL) | |
f6aa7436 | 126 | storage = objfiles_bfd_data.get (abfd); |
706e3705 TT |
127 | |
128 | if (storage == NULL) | |
129 | { | |
0072c873 | 130 | storage = new objfile_per_bfd_storage (abfd); |
1da77581 TT |
131 | /* If the object requires gdb to do relocations, we simply fall |
132 | back to not sharing data across users. These cases are rare | |
133 | enough that this seems reasonable. */ | |
134 | if (abfd != NULL && !gdb_bfd_requires_relocations (abfd)) | |
f6aa7436 | 135 | objfiles_bfd_data.set (abfd, storage); |
88c4cce8 TT |
136 | else |
137 | objfile->per_bfd_storage.reset (storage); | |
706e3705 | 138 | |
1da77581 TT |
139 | /* Look up the gdbarch associated with the BFD. */ |
140 | if (abfd != NULL) | |
141 | storage->gdbarch = gdbarch_from_bfd (abfd); | |
706e3705 TT |
142 | } |
143 | ||
88c4cce8 | 144 | objfile->per_bfd = storage; |
706e3705 TT |
145 | } |
146 | ||
3d548a53 TT |
147 | /* Set the objfile's per-BFD notion of the "main" name and |
148 | language. */ | |
149 | ||
150 | void | |
151 | set_objfile_main_name (struct objfile *objfile, | |
152 | const char *name, enum language lang) | |
153 | { | |
154 | if (objfile->per_bfd->name_of_main == NULL | |
155 | || strcmp (objfile->per_bfd->name_of_main, name) != 0) | |
156 | objfile->per_bfd->name_of_main | |
021887d8 | 157 | = obstack_strdup (&objfile->per_bfd->storage_obstack, name); |
3d548a53 TT |
158 | objfile->per_bfd->language_of_main = lang; |
159 | } | |
160 | ||
63e43d3a PMR |
161 | /* Helper structure to map blocks to static link properties in hash tables. */ |
162 | ||
163 | struct static_link_htab_entry | |
164 | { | |
165 | const struct block *block; | |
166 | const struct dynamic_prop *static_link; | |
167 | }; | |
168 | ||
169 | /* Return a hash code for struct static_link_htab_entry *P. */ | |
170 | ||
171 | static hashval_t | |
172 | static_link_htab_entry_hash (const void *p) | |
173 | { | |
174 | const struct static_link_htab_entry *e | |
175 | = (const struct static_link_htab_entry *) p; | |
176 | ||
177 | return htab_hash_pointer (e->block); | |
178 | } | |
179 | ||
180 | /* Return whether P1 an P2 (pointers to struct static_link_htab_entry) are | |
181 | mappings for the same block. */ | |
182 | ||
183 | static int | |
184 | static_link_htab_entry_eq (const void *p1, const void *p2) | |
185 | { | |
186 | const struct static_link_htab_entry *e1 | |
187 | = (const struct static_link_htab_entry *) p1; | |
188 | const struct static_link_htab_entry *e2 | |
189 | = (const struct static_link_htab_entry *) p2; | |
190 | ||
191 | return e1->block == e2->block; | |
192 | } | |
193 | ||
194 | /* Register STATIC_LINK as the static link for BLOCK, which is part of OBJFILE. | |
195 | Must not be called more than once for each BLOCK. */ | |
196 | ||
197 | void | |
198 | objfile_register_static_link (struct objfile *objfile, | |
199 | const struct block *block, | |
200 | const struct dynamic_prop *static_link) | |
201 | { | |
202 | void **slot; | |
203 | struct static_link_htab_entry lookup_entry; | |
204 | struct static_link_htab_entry *entry; | |
205 | ||
206 | if (objfile->static_links == NULL) | |
cf250e36 | 207 | objfile->static_links.reset (htab_create_alloc |
63e43d3a | 208 | (1, &static_link_htab_entry_hash, static_link_htab_entry_eq, NULL, |
cf250e36 | 209 | xcalloc, xfree)); |
63e43d3a PMR |
210 | |
211 | /* Create a slot for the mapping, make sure it's the first mapping for this | |
212 | block and then create the mapping itself. */ | |
213 | lookup_entry.block = block; | |
cf250e36 | 214 | slot = htab_find_slot (objfile->static_links.get (), &lookup_entry, INSERT); |
63e43d3a PMR |
215 | gdb_assert (*slot == NULL); |
216 | ||
e39db4db | 217 | entry = XOBNEW (&objfile->objfile_obstack, static_link_htab_entry); |
63e43d3a PMR |
218 | entry->block = block; |
219 | entry->static_link = static_link; | |
220 | *slot = (void *) entry; | |
221 | } | |
222 | ||
223 | /* Look for a static link for BLOCK, which is part of OBJFILE. Return NULL if | |
224 | none was found. */ | |
225 | ||
226 | const struct dynamic_prop * | |
227 | objfile_lookup_static_link (struct objfile *objfile, | |
228 | const struct block *block) | |
229 | { | |
230 | struct static_link_htab_entry *entry; | |
231 | struct static_link_htab_entry lookup_entry; | |
232 | ||
233 | if (objfile->static_links == NULL) | |
234 | return NULL; | |
235 | lookup_entry.block = block; | |
cf250e36 TT |
236 | entry = ((struct static_link_htab_entry *) |
237 | htab_find (objfile->static_links.get (), &lookup_entry)); | |
63e43d3a PMR |
238 | if (entry == NULL) |
239 | return NULL; | |
240 | ||
241 | gdb_assert (entry->block == block); | |
242 | return entry->static_link; | |
243 | } | |
244 | ||
706e3705 TT |
245 | \f |
246 | ||
cb814f2e TT |
247 | /* Build up the section table that the objfile references. The |
248 | objfile contains pointers to the start of the table | |
249 | (objfile->sections) and to the first location after the end of the | |
250 | table (objfile->sections_end). */ | |
96baa820 | 251 | |
65cf3563 | 252 | static void |
cb814f2e | 253 | add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
65cf3563 TT |
254 | struct objfile *objfile, int force) |
255 | { | |
256 | struct obj_section *section; | |
257 | ||
258 | if (!force) | |
259 | { | |
260 | flagword aflag; | |
261 | ||
fd361982 | 262 | aflag = bfd_section_flags (asect); |
65cf3563 TT |
263 | if (!(aflag & SEC_ALLOC)) |
264 | return; | |
265 | } | |
266 | ||
9ed8433a | 267 | section = &objfile->sections_start[gdb_bfd_section_index (abfd, asect)]; |
65cf3563 TT |
268 | section->objfile = objfile; |
269 | section->the_bfd_section = asect; | |
270 | section->ovly_mapped = 0; | |
271 | } | |
272 | ||
c906108c | 273 | /* Builds a section table for OBJFILE. |
96baa820 | 274 | |
65cf3563 TT |
275 | Note that the OFFSET and OVLY_MAPPED in each table entry are |
276 | initialized to zero. */ | |
c906108c | 277 | |
d82ea6a8 | 278 | void |
fba45db2 | 279 | build_objfile_section_table (struct objfile *objfile) |
c906108c | 280 | { |
98badbfd | 281 | int count = gdb_bfd_count_sections (objfile->obfd.get ()); |
65cf3563 | 282 | |
9ed8433a TT |
283 | objfile->sections_start = OBSTACK_CALLOC (&objfile->objfile_obstack, |
284 | count, | |
285 | struct obj_section); | |
286 | objfile->sections_end = (objfile->sections_start + count); | |
cb814f2e | 287 | for (asection *sect : gdb_bfd_sections (objfile->obfd)) |
98badbfd | 288 | add_to_objfile_sections (objfile->obfd.get (), sect, objfile, 0); |
65cf3563 TT |
289 | |
290 | /* See gdb_bfd_section_index. */ | |
98badbfd TT |
291 | add_to_objfile_sections (objfile->obfd.get (), bfd_com_section_ptr, |
292 | objfile, 1); | |
293 | add_to_objfile_sections (objfile->obfd.get (), bfd_und_section_ptr, | |
294 | objfile, 1); | |
295 | add_to_objfile_sections (objfile->obfd.get (), bfd_abs_section_ptr, | |
296 | objfile, 1); | |
297 | add_to_objfile_sections (objfile->obfd.get (), bfd_ind_section_ptr, | |
298 | objfile, 1); | |
c906108c SS |
299 | } |
300 | ||
9e86da07 TT |
301 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits, |
302 | initialize the new objfile as best we can and link it into the list | |
303 | of all known objfiles. | |
c906108c | 304 | |
24ba069a JK |
305 | NAME should contain original non-canonicalized filename or other |
306 | identifier as entered by user. If there is no better source use | |
307 | bfd_get_filename (ABFD). NAME may be NULL only if ABFD is NULL. | |
308 | NAME content is copied into returned objfile. | |
309 | ||
2df3850c | 310 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
78a4a9b9 | 311 | requests for specific operations. Other bits like OBJF_SHARED are |
0df8b418 | 312 | simply copied through to the new objfile flags member. */ |
c906108c | 313 | |
98badbfd | 314 | objfile::objfile (gdb_bfd_ref_ptr bfd_, const char *name, objfile_flags flags_) |
9e86da07 TT |
315 | : flags (flags_), |
316 | pspace (current_program_space), | |
98badbfd | 317 | obfd (std::move (bfd_)) |
c906108c | 318 | { |
14278e1f | 319 | const char *expanded_name; |
c906108c | 320 | |
7ab2607f | 321 | std::string name_holder; |
24ba069a JK |
322 | if (name == NULL) |
323 | { | |
98badbfd | 324 | gdb_assert (obfd == nullptr); |
40135bb1 | 325 | gdb_assert ((flags & OBJF_NOT_FILENAME) != 0); |
e3e41d58 | 326 | expanded_name = "<<anonymous objfile>>"; |
24ba069a | 327 | } |
5fbae7d1 GB |
328 | else if ((flags & OBJF_NOT_FILENAME) != 0 |
329 | || is_target_filename (name)) | |
e3e41d58 | 330 | expanded_name = name; |
04affae3 | 331 | else |
e3e41d58 TT |
332 | { |
333 | name_holder = gdb_abspath (name); | |
7ab2607f | 334 | expanded_name = name_holder.c_str (); |
e3e41d58 | 335 | } |
021887d8 | 336 | original_name = obstack_strdup (&objfile_obstack, expanded_name); |
04affae3 | 337 | |
d3e81981 DE |
338 | /* Update the per-objfile information that comes from the bfd, ensuring |
339 | that any data that is reference is saved in the per-objfile data | |
340 | region. */ | |
341 | ||
98badbfd | 342 | if (obfd != nullptr) |
c906108c | 343 | { |
98badbfd | 344 | mtime = bfd_get_mtime (obfd.get ()); |
c906108c SS |
345 | |
346 | /* Build section table. */ | |
9e86da07 | 347 | build_objfile_section_table (this); |
c906108c SS |
348 | } |
349 | ||
88c4cce8 | 350 | set_objfile_per_bfd (this); |
c906108c SS |
351 | } |
352 | ||
abd0a5fa JK |
353 | /* If there is a valid and known entry point, function fills *ENTRY_P with it |
354 | and returns non-zero; otherwise it returns zero. */ | |
9ab9195f | 355 | |
abd0a5fa JK |
356 | int |
357 | entry_point_address_query (CORE_ADDR *entry_p) | |
9ab9195f | 358 | { |
a42d7dd8 TT |
359 | objfile *objf = current_program_space->symfile_object_file; |
360 | if (objf == NULL || !objf->per_bfd->ei.entry_point_p) | |
3612b192 DJ |
361 | return 0; |
362 | ||
a42d7dd8 TT |
363 | int idx = objf->per_bfd->ei.the_bfd_section_index; |
364 | *entry_p = objf->per_bfd->ei.entry_point + objf->section_offsets[idx]; | |
3612b192 | 365 | |
abd0a5fa JK |
366 | return 1; |
367 | } | |
368 | ||
369 | /* Get current entry point address. Call error if it is not known. */ | |
370 | ||
371 | CORE_ADDR | |
372 | entry_point_address (void) | |
373 | { | |
374 | CORE_ADDR retval; | |
375 | ||
376 | if (!entry_point_address_query (&retval)) | |
377 | error (_("Entry point address is not known.")); | |
378 | ||
379 | return retval; | |
9ab9195f | 380 | } |
15831452 | 381 | |
e9ad22ee TT |
382 | separate_debug_iterator & |
383 | separate_debug_iterator::operator++ () | |
15d123c9 | 384 | { |
e9ad22ee TT |
385 | gdb_assert (m_objfile != nullptr); |
386 | ||
15d123c9 TG |
387 | struct objfile *res; |
388 | ||
399f313b | 389 | /* If any, return the first child. */ |
e9ad22ee TT |
390 | res = m_objfile->separate_debug_objfile; |
391 | if (res != nullptr) | |
392 | { | |
393 | m_objfile = res; | |
394 | return *this; | |
395 | } | |
15d123c9 | 396 | |
15d123c9 | 397 | /* Common case where there is no separate debug objfile. */ |
e9ad22ee TT |
398 | if (m_objfile == m_parent) |
399 | { | |
400 | m_objfile = nullptr; | |
401 | return *this; | |
402 | } | |
15d123c9 | 403 | |
399f313b TG |
404 | /* Return the brother if any. Note that we don't iterate on brothers of |
405 | the parents. */ | |
e9ad22ee TT |
406 | res = m_objfile->separate_debug_objfile_link; |
407 | if (res != nullptr) | |
408 | { | |
409 | m_objfile = res; | |
410 | return *this; | |
411 | } | |
399f313b | 412 | |
e9ad22ee TT |
413 | for (res = m_objfile->separate_debug_objfile_backlink; |
414 | res != m_parent; | |
15d123c9 TG |
415 | res = res->separate_debug_objfile_backlink) |
416 | { | |
e9ad22ee TT |
417 | gdb_assert (res != nullptr); |
418 | if (res->separate_debug_objfile_link != nullptr) | |
419 | { | |
420 | m_objfile = res->separate_debug_objfile_link; | |
421 | return *this; | |
422 | } | |
15d123c9 | 423 | } |
e9ad22ee TT |
424 | m_objfile = nullptr; |
425 | return *this; | |
15d123c9 | 426 | } |
15831452 | 427 | |
15d123c9 TG |
428 | /* Add OBJFILE as a separate debug objfile of PARENT. */ |
429 | ||
f65fe570 | 430 | static void |
15d123c9 TG |
431 | add_separate_debug_objfile (struct objfile *objfile, struct objfile *parent) |
432 | { | |
433 | gdb_assert (objfile && parent); | |
434 | ||
435 | /* Must not be already in a list. */ | |
436 | gdb_assert (objfile->separate_debug_objfile_backlink == NULL); | |
437 | gdb_assert (objfile->separate_debug_objfile_link == NULL); | |
8a92335b JK |
438 | gdb_assert (objfile->separate_debug_objfile == NULL); |
439 | gdb_assert (parent->separate_debug_objfile_backlink == NULL); | |
440 | gdb_assert (parent->separate_debug_objfile_link == NULL); | |
15d123c9 TG |
441 | |
442 | objfile->separate_debug_objfile_backlink = parent; | |
443 | objfile->separate_debug_objfile_link = parent->separate_debug_objfile; | |
444 | parent->separate_debug_objfile = objfile; | |
15d123c9 TG |
445 | } |
446 | ||
f65fe570 TT |
447 | /* See objfiles.h. */ |
448 | ||
449 | objfile * | |
98badbfd | 450 | objfile::make (gdb_bfd_ref_ptr bfd_, const char *name_, objfile_flags flags_, |
f65fe570 TT |
451 | objfile *parent) |
452 | { | |
98badbfd | 453 | objfile *result = new objfile (std::move (bfd_), name_, flags_); |
f65fe570 TT |
454 | if (parent != nullptr) |
455 | add_separate_debug_objfile (result, parent); | |
7cac64af | 456 | |
e2904e1f | 457 | current_program_space->add_objfile (std::unique_ptr<objfile> (result), |
7d7167ce | 458 | parent); |
7cac64af TT |
459 | |
460 | /* Rebuild section map next time we need it. */ | |
461 | get_objfile_pspace_data (current_program_space)->new_objfiles_available = 1; | |
462 | ||
f65fe570 TT |
463 | return result; |
464 | } | |
465 | ||
268e4f09 TT |
466 | /* See objfiles.h. */ |
467 | ||
468 | void | |
469 | objfile::unlink () | |
470 | { | |
23452926 | 471 | current_program_space->remove_objfile (this); |
268e4f09 TT |
472 | } |
473 | ||
15d123c9 TG |
474 | /* Free all separate debug objfile of OBJFILE, but don't free OBJFILE |
475 | itself. */ | |
476 | ||
477 | void | |
478 | free_objfile_separate_debug (struct objfile *objfile) | |
479 | { | |
480 | struct objfile *child; | |
481 | ||
482 | for (child = objfile->separate_debug_objfile; child;) | |
483 | { | |
484 | struct objfile *next_child = child->separate_debug_objfile_link; | |
268e4f09 | 485 | child->unlink (); |
15d123c9 TG |
486 | child = next_child; |
487 | } | |
488 | } | |
c906108c | 489 | |
7580e917 | 490 | /* Destroy an objfile and all the symtabs and psymtabs under it. */ |
c906108c | 491 | |
9e86da07 | 492 | objfile::~objfile () |
c906108c | 493 | { |
63644780 | 494 | /* First notify observers that this objfile is about to be freed. */ |
76727919 | 495 | gdb::observers::free_objfile.notify (this); |
63644780 | 496 | |
15d123c9 | 497 | /* Free all separate debug objfiles. */ |
9e86da07 | 498 | free_objfile_separate_debug (this); |
15d123c9 | 499 | |
9e86da07 | 500 | if (separate_debug_objfile_backlink) |
5b5d99cf JB |
501 | { |
502 | /* We freed the separate debug file, make sure the base objfile | |
503 | doesn't reference it. */ | |
15d123c9 TG |
504 | struct objfile *child; |
505 | ||
9e86da07 | 506 | child = separate_debug_objfile_backlink->separate_debug_objfile; |
15d123c9 | 507 | |
9e86da07 | 508 | if (child == this) |
dda83cd7 SM |
509 | { |
510 | /* THIS is the first child. */ | |
511 | separate_debug_objfile_backlink->separate_debug_objfile = | |
512 | separate_debug_objfile_link; | |
513 | } | |
15d123c9 | 514 | else |
dda83cd7 SM |
515 | { |
516 | /* Find THIS in the list. */ | |
517 | while (1) | |
518 | { | |
519 | if (child->separate_debug_objfile_link == this) | |
520 | { | |
521 | child->separate_debug_objfile_link = | |
522 | separate_debug_objfile_link; | |
523 | break; | |
524 | } | |
525 | child = child->separate_debug_objfile_link; | |
526 | gdb_assert (child); | |
527 | } | |
528 | } | |
5b5d99cf | 529 | } |
9e86da07 | 530 | |
ae5a43e0 DJ |
531 | /* Remove any references to this objfile in the global value |
532 | lists. */ | |
9e86da07 | 533 | preserve_values (this); |
ae5a43e0 | 534 | |
9f743ef6 JK |
535 | /* It still may reference data modules have associated with the objfile and |
536 | the symbol file data. */ | |
21f6be77 | 537 | forget_cached_source_info (); |
9f743ef6 | 538 | |
9e86da07 TT |
539 | breakpoint_free_objfile (this); |
540 | btrace_free_objfile (this); | |
2f202fde | 541 | |
c906108c SS |
542 | /* First do any symbol file specific actions required when we are |
543 | finished with a particular symbol file. Note that if the objfile | |
544 | is using reusable symbol information (via mmalloc) then each of | |
545 | these routines is responsible for doing the correct thing, either | |
546 | freeing things which are valid only during this particular gdb | |
0df8b418 | 547 | execution, or leaving them to be reused during the next one. */ |
c906108c | 548 | |
9e86da07 TT |
549 | if (sf != NULL) |
550 | (*sf->sym_finish) (this); | |
c906108c | 551 | |
c906108c SS |
552 | /* Before the symbol table code was redone to make it easier to |
553 | selectively load and remove information particular to a specific | |
554 | linkage unit, gdb used to do these things whenever the monolithic | |
555 | symbol table was blown away. How much still needs to be done | |
556 | is unknown, but we play it safe for now and keep each action until | |
0df8b418 | 557 | it is shown to be no longer needed. */ |
c5aa993b | 558 | |
cb5d864f FF |
559 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
560 | for example), so we need to call this here. */ | |
c906108c SS |
561 | clear_pc_function_cache (); |
562 | ||
cb5d864f | 563 | /* Check to see if the current_source_symtab belongs to this objfile, |
0df8b418 | 564 | and if so, call clear_current_source_symtab_and_line. */ |
cb5d864f FF |
565 | |
566 | { | |
567 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
cb5d864f | 568 | |
3c86fae3 | 569 | if (cursal.symtab && cursal.symtab->compunit ()->objfile () == this) |
00174a86 | 570 | clear_current_source_symtab_and_line (); |
cb5d864f FF |
571 | } |
572 | ||
6c95b8df | 573 | /* Rebuild section map next time we need it. */ |
9e86da07 | 574 | get_objfile_pspace_data (pspace)->section_map_dirty = 1; |
c906108c SS |
575 | } |
576 | ||
c906108c | 577 | \f |
34eaf542 TT |
578 | /* A helper function for objfile_relocate1 that relocates a single |
579 | symbol. */ | |
580 | ||
581 | static void | |
582 | relocate_one_symbol (struct symbol *sym, struct objfile *objfile, | |
6a053cb1 | 583 | const section_offsets &delta) |
34eaf542 | 584 | { |
34eaf542 TT |
585 | /* The RS6000 code from which this was taken skipped |
586 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. | |
587 | But I'm leaving out that test, on the theory that | |
588 | they can't possibly pass the tests below. */ | |
66d7f48f SM |
589 | if ((sym->aclass () == LOC_LABEL |
590 | || sym->aclass () == LOC_STATIC) | |
a52d653e | 591 | && sym->section_index () >= 0) |
4aeddc50 SM |
592 | sym->set_value_address (sym->value_address () |
593 | + delta[sym->section_index ()]); | |
34eaf542 TT |
594 | } |
595 | ||
c906108c | 596 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS |
b260e109 JK |
597 | entries in new_offsets. SEPARATE_DEBUG_OBJFILE is not touched here. |
598 | Return non-zero iff any change happened. */ | |
567995e1 | 599 | |
b260e109 | 600 | static int |
5cc80db3 | 601 | objfile_relocate1 (struct objfile *objfile, |
6a053cb1 | 602 | const section_offsets &new_offsets) |
c906108c | 603 | { |
6a053cb1 | 604 | section_offsets delta (objfile->section_offsets.size ()); |
c906108c | 605 | |
5cc80db3 MS |
606 | int something_changed = 0; |
607 | ||
6a053cb1 | 608 | for (int i = 0; i < objfile->section_offsets.size (); ++i) |
5cc80db3 | 609 | { |
6a053cb1 TT |
610 | delta[i] = new_offsets[i] - objfile->section_offsets[i]; |
611 | if (delta[i] != 0) | |
5cc80db3 MS |
612 | something_changed = 1; |
613 | } | |
614 | if (!something_changed) | |
615 | return 0; | |
c906108c SS |
616 | |
617 | /* OK, get all the symtabs. */ | |
82c5090c TT |
618 | for (compunit_symtab *cust : objfile->compunits ()) |
619 | { | |
620 | struct blockvector *bv = cust->blockvector (); | |
621 | int block_line_section = SECT_OFF_TEXT (objfile); | |
c906108c | 622 | |
82c5090c TT |
623 | if (bv->map () != nullptr) |
624 | bv->map ()->relocate (delta[block_line_section]); | |
34eaf542 | 625 | |
82c5090c TT |
626 | for (block *b : bv->blocks ()) |
627 | { | |
82c5090c TT |
628 | b->set_start (b->start () + delta[block_line_section]); |
629 | b->set_end (b->end () + delta[block_line_section]); | |
5cc80db3 | 630 | |
82c5090c TT |
631 | for (blockrange &r : b->ranges ()) |
632 | { | |
633 | r.set_start (r.start () + delta[block_line_section]); | |
634 | r.set_end (r.end () + delta[block_line_section]); | |
635 | } | |
636 | ||
637 | /* We only want to iterate over the local symbols, not any | |
638 | symbols in included symtabs. */ | |
8e8d48f9 TT |
639 | for (struct symbol *sym : b->multidict_symbols ()) |
640 | relocate_one_symbol (sym, objfile, delta); | |
82c5090c TT |
641 | } |
642 | } | |
643 | ||
644 | /* Relocate isolated symbols. */ | |
645 | for (symbol *iter = objfile->template_symbols; iter; iter = iter->hash_next) | |
646 | relocate_one_symbol (iter, objfile, delta); | |
647 | ||
648 | for (int i = 0; i < objfile->section_offsets.size (); ++i) | |
649 | objfile->section_offsets[i] = new_offsets[i]; | |
f1f2b5f4 PA |
650 | |
651 | /* Rebuild section map next time we need it. */ | |
607ece04 | 652 | get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1; |
f1f2b5f4 | 653 | |
30510692 | 654 | /* Update the table in exec_ops, used to read memory. */ |
5250cbc8 | 655 | for (obj_section *s : objfile->sections ()) |
30510692 | 656 | { |
9ed8433a | 657 | int idx = s - objfile->sections_start; |
30510692 | 658 | |
98badbfd | 659 | exec_set_section_address (bfd_get_filename (objfile->obfd.get ()), idx, |
0c1bcd23 | 660 | s->addr ()); |
30510692 | 661 | } |
b260e109 JK |
662 | |
663 | /* Data changed. */ | |
664 | return 1; | |
567995e1 JK |
665 | } |
666 | ||
667 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
668 | entries in new_offsets. Process also OBJFILE's SEPARATE_DEBUG_OBJFILEs. | |
669 | ||
670 | The number and ordering of sections does differ between the two objfiles. | |
671 | Only their names match. Also the file offsets will differ (objfile being | |
672 | possibly prelinked but separate_debug_objfile is probably not prelinked) but | |
673 | the in-memory absolute address as specified by NEW_OFFSETS must match both | |
674 | files. */ | |
675 | ||
676 | void | |
3189cb12 | 677 | objfile_relocate (struct objfile *objfile, |
6a053cb1 | 678 | const section_offsets &new_offsets) |
567995e1 | 679 | { |
b260e109 | 680 | int changed = 0; |
567995e1 | 681 | |
b260e109 | 682 | changed |= objfile_relocate1 (objfile, new_offsets); |
567995e1 | 683 | |
bde09ab7 | 684 | for (::objfile *debug_objfile : objfile->separate_debug_objfiles ()) |
567995e1 | 685 | { |
e9ad22ee TT |
686 | if (debug_objfile == objfile) |
687 | continue; | |
688 | ||
37e136b1 TT |
689 | section_addr_info objfile_addrs |
690 | = build_section_addr_info_from_objfile (objfile); | |
567995e1 JK |
691 | |
692 | /* Here OBJFILE_ADDRS contain the correct absolute addresses, the | |
693 | relative ones must be already created according to debug_objfile. */ | |
694 | ||
98badbfd | 695 | addr_info_make_relative (&objfile_addrs, debug_objfile->obfd.get ()); |
567995e1 | 696 | |
6a053cb1 | 697 | gdb_assert (debug_objfile->section_offsets.size () |
98badbfd | 698 | == gdb_bfd_count_sections (debug_objfile->obfd.get ())); |
6a053cb1 TT |
699 | section_offsets new_debug_offsets |
700 | (debug_objfile->section_offsets.size ()); | |
701 | relative_addr_info_to_section_offsets (new_debug_offsets, objfile_addrs); | |
567995e1 | 702 | |
6a053cb1 | 703 | changed |= objfile_relocate1 (debug_objfile, new_debug_offsets); |
567995e1 | 704 | } |
30510692 | 705 | |
0df8b418 | 706 | /* Relocate breakpoints as necessary, after things are relocated. */ |
b260e109 JK |
707 | if (changed) |
708 | breakpoint_re_set (); | |
c906108c | 709 | } |
4141a416 JB |
710 | |
711 | /* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is | |
712 | not touched here. | |
713 | Return non-zero iff any change happened. */ | |
714 | ||
715 | static int | |
716 | objfile_rebase1 (struct objfile *objfile, CORE_ADDR slide) | |
717 | { | |
6a053cb1 | 718 | section_offsets new_offsets (objfile->section_offsets.size (), slide); |
4141a416 JB |
719 | return objfile_relocate1 (objfile, new_offsets); |
720 | } | |
721 | ||
722 | /* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's | |
723 | SEPARATE_DEBUG_OBJFILEs. */ | |
724 | ||
725 | void | |
726 | objfile_rebase (struct objfile *objfile, CORE_ADDR slide) | |
727 | { | |
4141a416 JB |
728 | int changed = 0; |
729 | ||
bde09ab7 | 730 | for (::objfile *debug_objfile : objfile->separate_debug_objfiles ()) |
4141a416 JB |
731 | changed |= objfile_rebase1 (debug_objfile, slide); |
732 | ||
733 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
734 | if (changed) | |
735 | breakpoint_re_set (); | |
736 | } | |
c906108c | 737 | \f |
55333a84 DE |
738 | /* Return non-zero if OBJFILE has full symbols. */ |
739 | ||
740 | int | |
741 | objfile_has_full_symbols (struct objfile *objfile) | |
742 | { | |
43f3e411 | 743 | return objfile->compunit_symtabs != NULL; |
55333a84 DE |
744 | } |
745 | ||
e361b228 | 746 | /* Return non-zero if OBJFILE has full or partial symbols, either directly |
15d123c9 | 747 | or through a separate debug file. */ |
e361b228 TG |
748 | |
749 | int | |
750 | objfile_has_symbols (struct objfile *objfile) | |
751 | { | |
bde09ab7 | 752 | for (::objfile *o : objfile->separate_debug_objfiles ()) |
a8ad4f3c | 753 | if (o->has_partial_symbols () || objfile_has_full_symbols (o)) |
15d123c9 | 754 | return 1; |
e361b228 TG |
755 | return 0; |
756 | } | |
757 | ||
758 | ||
c906108c SS |
759 | /* Many places in gdb want to test just to see if we have any partial |
760 | symbols available. This function returns zero if none are currently | |
0df8b418 | 761 | available, nonzero otherwise. */ |
c906108c SS |
762 | |
763 | int | |
fba45db2 | 764 | have_partial_symbols (void) |
c906108c | 765 | { |
2030c079 | 766 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 | 767 | { |
a8ad4f3c | 768 | if (ofp->has_partial_symbols ()) |
aed57c53 TT |
769 | return 1; |
770 | } | |
c906108c SS |
771 | return 0; |
772 | } | |
773 | ||
774 | /* Many places in gdb want to test just to see if we have any full | |
775 | symbols available. This function returns zero if none are currently | |
0df8b418 | 776 | available, nonzero otherwise. */ |
c906108c SS |
777 | |
778 | int | |
fba45db2 | 779 | have_full_symbols (void) |
c906108c | 780 | { |
2030c079 | 781 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 TT |
782 | { |
783 | if (objfile_has_full_symbols (ofp)) | |
784 | return 1; | |
785 | } | |
c906108c SS |
786 | return 0; |
787 | } | |
788 | ||
789 | ||
790 | /* This operations deletes all objfile entries that represent solibs that | |
791 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
0df8b418 MS |
792 | command. */ |
793 | ||
c906108c | 794 | void |
fba45db2 | 795 | objfile_purge_solibs (void) |
c906108c | 796 | { |
7e955d83 | 797 | for (objfile *objf : current_program_space->objfiles_safe ()) |
cac85af2 TT |
798 | { |
799 | /* We assume that the solib package has been purged already, or will | |
800 | be soon. */ | |
0df8b418 | 801 | |
cac85af2 | 802 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
268e4f09 | 803 | objf->unlink (); |
cac85af2 | 804 | } |
c906108c SS |
805 | } |
806 | ||
807 | ||
808 | /* Many places in gdb want to test just to see if we have any minimal | |
809 | symbols available. This function returns zero if none are currently | |
0df8b418 | 810 | available, nonzero otherwise. */ |
c906108c SS |
811 | |
812 | int | |
fba45db2 | 813 | have_minimal_symbols (void) |
c906108c | 814 | { |
2030c079 | 815 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 TT |
816 | { |
817 | if (ofp->per_bfd->minimal_symbol_count > 0) | |
818 | { | |
819 | return 1; | |
820 | } | |
821 | } | |
c906108c SS |
822 | return 0; |
823 | } | |
824 | ||
a845f5cb PP |
825 | /* Qsort comparison function. */ |
826 | ||
39ef2f62 CB |
827 | static bool |
828 | sort_cmp (const struct obj_section *sect1, const obj_section *sect2) | |
a845f5cb | 829 | { |
0c1bcd23 SM |
830 | const CORE_ADDR sect1_addr = sect1->addr (); |
831 | const CORE_ADDR sect2_addr = sect2->addr (); | |
a845f5cb PP |
832 | |
833 | if (sect1_addr < sect2_addr) | |
39ef2f62 | 834 | return true; |
a845f5cb | 835 | else if (sect1_addr > sect2_addr) |
39ef2f62 | 836 | return false; |
6fbf07cd | 837 | else |
5cc80db3 MS |
838 | { |
839 | /* Sections are at the same address. This could happen if | |
840 | A) we have an objfile and a separate debuginfo. | |
841 | B) we are confused, and have added sections without proper relocation, | |
0df8b418 | 842 | or something like that. */ |
5cc80db3 MS |
843 | |
844 | const struct objfile *const objfile1 = sect1->objfile; | |
845 | const struct objfile *const objfile2 = sect2->objfile; | |
846 | ||
847 | if (objfile1->separate_debug_objfile == objfile2 | |
848 | || objfile2->separate_debug_objfile == objfile1) | |
849 | { | |
850 | /* Case A. The ordering doesn't matter: separate debuginfo files | |
851 | will be filtered out later. */ | |
852 | ||
39ef2f62 | 853 | return false; |
5cc80db3 MS |
854 | } |
855 | ||
856 | /* Case B. Maintain stable sort order, so bugs in GDB are easier to | |
857 | triage. This section could be slow (since we iterate over all | |
39ef2f62 | 858 | objfiles in each call to sort_cmp), but this shouldn't happen |
5cc80db3 MS |
859 | very often (GDB is already in a confused state; one hopes this |
860 | doesn't happen at all). If you discover that significant time is | |
861 | spent in the loops below, do 'set complaints 100' and examine the | |
862 | resulting complaints. */ | |
5cc80db3 MS |
863 | if (objfile1 == objfile2) |
864 | { | |
45f47c3a AB |
865 | /* Both sections came from the same objfile. We are really |
866 | confused. Sort on sequence order of sections within the | |
867 | objfile. The order of checks is important here, if we find a | |
868 | match on SECT2 first then either SECT2 is before SECT1, or, | |
869 | SECT2 == SECT1, in both cases we should return false. The | |
870 | second case shouldn't occur during normal use, but std::sort | |
871 | does check that '!(a < a)' when compiled in debug mode. */ | |
5cc80db3 | 872 | |
5250cbc8 | 873 | for (const obj_section *osect : objfile1->sections ()) |
45f47c3a | 874 | if (osect == sect2) |
39ef2f62 | 875 | return false; |
45f47c3a AB |
876 | else if (osect == sect1) |
877 | return true; | |
5cc80db3 MS |
878 | |
879 | /* We should have found one of the sections before getting here. */ | |
f3574227 | 880 | gdb_assert_not_reached ("section not found"); |
5cc80db3 MS |
881 | } |
882 | else | |
883 | { | |
884 | /* Sort on sequence number of the objfile in the chain. */ | |
885 | ||
2030c079 | 886 | for (objfile *objfile : current_program_space->objfiles ()) |
5cc80db3 | 887 | if (objfile == objfile1) |
39ef2f62 | 888 | return true; |
5cc80db3 | 889 | else if (objfile == objfile2) |
39ef2f62 | 890 | return false; |
5cc80db3 MS |
891 | |
892 | /* We should have found one of the objfiles before getting here. */ | |
f3574227 | 893 | gdb_assert_not_reached ("objfile not found"); |
5cc80db3 MS |
894 | } |
895 | } | |
6fbf07cd PP |
896 | |
897 | /* Unreachable. */ | |
f3574227 | 898 | gdb_assert_not_reached ("unexpected code path"); |
39ef2f62 | 899 | return false; |
a845f5cb PP |
900 | } |
901 | ||
3aad21cf PP |
902 | /* Select "better" obj_section to keep. We prefer the one that came from |
903 | the real object, rather than the one from separate debuginfo. | |
904 | Most of the time the two sections are exactly identical, but with | |
905 | prelinking the .rel.dyn section in the real object may have different | |
906 | size. */ | |
907 | ||
908 | static struct obj_section * | |
909 | preferred_obj_section (struct obj_section *a, struct obj_section *b) | |
910 | { | |
0c1bcd23 | 911 | gdb_assert (a->addr () == b->addr ()); |
3aad21cf PP |
912 | gdb_assert ((a->objfile->separate_debug_objfile == b->objfile) |
913 | || (b->objfile->separate_debug_objfile == a->objfile)); | |
914 | gdb_assert ((a->objfile->separate_debug_objfile_backlink == b->objfile) | |
915 | || (b->objfile->separate_debug_objfile_backlink == a->objfile)); | |
916 | ||
917 | if (a->objfile->separate_debug_objfile != NULL) | |
918 | return a; | |
919 | return b; | |
920 | } | |
921 | ||
6fbf07cd | 922 | /* Return 1 if SECTION should be inserted into the section map. |
625b6eae | 923 | We want to insert only non-overlay non-TLS non-empty sections. */ |
6fbf07cd PP |
924 | |
925 | static int | |
926 | insert_section_p (const struct bfd *abfd, | |
927 | const struct bfd_section *section) | |
928 | { | |
fd361982 | 929 | const bfd_vma lma = bfd_section_lma (section); |
6fbf07cd | 930 | |
fd361982 | 931 | if (overlay_debugging && lma != 0 && lma != bfd_section_vma (section) |
6fbf07cd PP |
932 | && (bfd_get_file_flags (abfd) & BFD_IN_MEMORY) == 0) |
933 | /* This is an overlay section. IN_MEMORY check is needed to avoid | |
934 | discarding sections from the "system supplied DSO" (aka vdso) | |
935 | on some Linux systems (e.g. Fedora 11). */ | |
936 | return 0; | |
fd361982 | 937 | if ((bfd_section_flags (section) & SEC_THREAD_LOCAL) != 0) |
6fbf07cd PP |
938 | /* This is a TLS section. */ |
939 | return 0; | |
625b6eae IL |
940 | if (bfd_section_size (section) == 0) |
941 | { | |
942 | /* This is an empty section. It has no PCs for find_pc_section (), so | |
943 | there is no reason to insert it into the section map. */ | |
944 | return 0; | |
945 | } | |
6fbf07cd PP |
946 | |
947 | return 1; | |
948 | } | |
949 | ||
950 | /* Filter out overlapping sections where one section came from the real | |
951 | objfile, and the other from a separate debuginfo file. | |
952 | Return the size of table after redundant sections have been eliminated. */ | |
953 | ||
954 | static int | |
955 | filter_debuginfo_sections (struct obj_section **map, int map_size) | |
956 | { | |
957 | int i, j; | |
958 | ||
959 | for (i = 0, j = 0; i < map_size - 1; i++) | |
960 | { | |
961 | struct obj_section *const sect1 = map[i]; | |
962 | struct obj_section *const sect2 = map[i + 1]; | |
963 | const struct objfile *const objfile1 = sect1->objfile; | |
964 | const struct objfile *const objfile2 = sect2->objfile; | |
0c1bcd23 SM |
965 | const CORE_ADDR sect1_addr = sect1->addr (); |
966 | const CORE_ADDR sect2_addr = sect2->addr (); | |
6fbf07cd PP |
967 | |
968 | if (sect1_addr == sect2_addr | |
969 | && (objfile1->separate_debug_objfile == objfile2 | |
970 | || objfile2->separate_debug_objfile == objfile1)) | |
971 | { | |
972 | map[j++] = preferred_obj_section (sect1, sect2); | |
973 | ++i; | |
974 | } | |
975 | else | |
976 | map[j++] = sect1; | |
977 | } | |
978 | ||
979 | if (i < map_size) | |
980 | { | |
981 | gdb_assert (i == map_size - 1); | |
982 | map[j++] = map[i]; | |
983 | } | |
984 | ||
985 | /* The map should not have shrunk to less than half the original size. */ | |
986 | gdb_assert (map_size / 2 <= j); | |
987 | ||
988 | return j; | |
989 | } | |
990 | ||
991 | /* Filter out overlapping sections, issuing a warning if any are found. | |
992 | Overlapping sections could really be overlay sections which we didn't | |
993 | classify as such in insert_section_p, or we could be dealing with a | |
994 | corrupt binary. */ | |
995 | ||
996 | static int | |
997 | filter_overlapping_sections (struct obj_section **map, int map_size) | |
998 | { | |
999 | int i, j; | |
1000 | ||
1001 | for (i = 0, j = 0; i < map_size - 1; ) | |
1002 | { | |
1003 | int k; | |
1004 | ||
1005 | map[j++] = map[i]; | |
1006 | for (k = i + 1; k < map_size; k++) | |
1007 | { | |
1008 | struct obj_section *const sect1 = map[i]; | |
1009 | struct obj_section *const sect2 = map[k]; | |
0c1bcd23 SM |
1010 | const CORE_ADDR sect1_addr = sect1->addr (); |
1011 | const CORE_ADDR sect2_addr = sect2->addr (); | |
1012 | const CORE_ADDR sect1_endaddr = sect1->endaddr (); | |
6fbf07cd PP |
1013 | |
1014 | gdb_assert (sect1_addr <= sect2_addr); | |
1015 | ||
1016 | if (sect1_endaddr <= sect2_addr) | |
1017 | break; | |
1018 | else | |
1019 | { | |
1020 | /* We have an overlap. Report it. */ | |
1021 | ||
1022 | struct objfile *const objf1 = sect1->objfile; | |
1023 | struct objfile *const objf2 = sect2->objfile; | |
1024 | ||
6fbf07cd PP |
1025 | const struct bfd_section *const bfds1 = sect1->the_bfd_section; |
1026 | const struct bfd_section *const bfds2 = sect2->the_bfd_section; | |
1027 | ||
0c1bcd23 | 1028 | const CORE_ADDR sect2_endaddr = sect2->endaddr (); |
6fbf07cd | 1029 | |
08feed99 | 1030 | struct gdbarch *const gdbarch = objf1->arch (); |
6fbf07cd | 1031 | |
b98664d3 | 1032 | complaint (_("unexpected overlap between:\n" |
6fbf07cd PP |
1033 | " (A) section `%s' from `%s' [%s, %s)\n" |
1034 | " (B) section `%s' from `%s' [%s, %s).\n" | |
1035 | "Will ignore section B"), | |
fd361982 | 1036 | bfd_section_name (bfds1), objfile_name (objf1), |
6fbf07cd PP |
1037 | paddress (gdbarch, sect1_addr), |
1038 | paddress (gdbarch, sect1_endaddr), | |
fd361982 | 1039 | bfd_section_name (bfds2), objfile_name (objf2), |
6fbf07cd PP |
1040 | paddress (gdbarch, sect2_addr), |
1041 | paddress (gdbarch, sect2_endaddr)); | |
1042 | } | |
1043 | } | |
1044 | i = k; | |
1045 | } | |
1046 | ||
1047 | if (i < map_size) | |
1048 | { | |
1049 | gdb_assert (i == map_size - 1); | |
1050 | map[j++] = map[i]; | |
1051 | } | |
1052 | ||
1053 | return j; | |
1054 | } | |
1055 | ||
1056 | ||
1057 | /* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any | |
1058 | TLS, overlay and overlapping sections. */ | |
a845f5cb PP |
1059 | |
1060 | static void | |
6c95b8df PA |
1061 | update_section_map (struct program_space *pspace, |
1062 | struct obj_section ***pmap, int *pmap_size) | |
a845f5cb | 1063 | { |
607ece04 | 1064 | struct objfile_pspace_info *pspace_info; |
6fbf07cd | 1065 | int alloc_size, map_size, i; |
5250cbc8 | 1066 | struct obj_section **map; |
a845f5cb | 1067 | |
607ece04 GB |
1068 | pspace_info = get_objfile_pspace_data (pspace); |
1069 | gdb_assert (pspace_info->section_map_dirty != 0 | |
1070 | || pspace_info->new_objfiles_available != 0); | |
a845f5cb PP |
1071 | |
1072 | map = *pmap; | |
1073 | xfree (map); | |
1074 | ||
6fbf07cd | 1075 | alloc_size = 0; |
2030c079 | 1076 | for (objfile *objfile : pspace->objfiles ()) |
5250cbc8 | 1077 | for (obj_section *s : objfile->sections ()) |
98badbfd | 1078 | if (insert_section_p (objfile->obfd.get (), s->the_bfd_section)) |
6c95b8df | 1079 | alloc_size += 1; |
a845f5cb | 1080 | |
65a97ab3 PP |
1081 | /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */ |
1082 | if (alloc_size == 0) | |
1083 | { | |
1084 | *pmap = NULL; | |
1085 | *pmap_size = 0; | |
1086 | return; | |
1087 | } | |
1088 | ||
8d749320 | 1089 | map = XNEWVEC (struct obj_section *, alloc_size); |
a845f5cb | 1090 | |
3aad21cf | 1091 | i = 0; |
2030c079 | 1092 | for (objfile *objfile : pspace->objfiles ()) |
5250cbc8 | 1093 | for (obj_section *s : objfile->sections ()) |
98badbfd | 1094 | if (insert_section_p (objfile->obfd.get (), s->the_bfd_section)) |
6c95b8df | 1095 | map[i++] = s; |
a845f5cb | 1096 | |
39ef2f62 | 1097 | std::sort (map, map + alloc_size, sort_cmp); |
6fbf07cd PP |
1098 | map_size = filter_debuginfo_sections(map, alloc_size); |
1099 | map_size = filter_overlapping_sections(map, map_size); | |
a845f5cb | 1100 | |
6fbf07cd PP |
1101 | if (map_size < alloc_size) |
1102 | /* Some sections were eliminated. Trim excess space. */ | |
224c3ddb | 1103 | map = XRESIZEVEC (struct obj_section *, map, map_size); |
3aad21cf | 1104 | else |
6fbf07cd | 1105 | gdb_assert (alloc_size == map_size); |
3aad21cf | 1106 | |
a845f5cb PP |
1107 | *pmap = map; |
1108 | *pmap_size = map_size; | |
1109 | } | |
1110 | ||
0df8b418 | 1111 | /* Bsearch comparison function. */ |
a845f5cb PP |
1112 | |
1113 | static int | |
1114 | bsearch_cmp (const void *key, const void *elt) | |
1115 | { | |
1116 | const CORE_ADDR pc = *(CORE_ADDR *) key; | |
1117 | const struct obj_section *section = *(const struct obj_section **) elt; | |
1118 | ||
0c1bcd23 | 1119 | if (pc < section->addr ()) |
a845f5cb | 1120 | return -1; |
0c1bcd23 | 1121 | if (pc < section->endaddr ()) |
a845f5cb PP |
1122 | return 0; |
1123 | return 1; | |
1124 | } | |
1125 | ||
714835d5 | 1126 | /* Returns a section whose range includes PC or NULL if none found. */ |
c906108c SS |
1127 | |
1128 | struct obj_section * | |
714835d5 | 1129 | find_pc_section (CORE_ADDR pc) |
c906108c | 1130 | { |
6c95b8df | 1131 | struct objfile_pspace_info *pspace_info; |
a845f5cb | 1132 | struct obj_section *s, **sp; |
c5aa993b | 1133 | |
714835d5 UW |
1134 | /* Check for mapped overlay section first. */ |
1135 | s = find_pc_mapped_section (pc); | |
1136 | if (s) | |
1137 | return s; | |
c906108c | 1138 | |
6c95b8df | 1139 | pspace_info = get_objfile_pspace_data (current_program_space); |
607ece04 GB |
1140 | if (pspace_info->section_map_dirty |
1141 | || (pspace_info->new_objfiles_available | |
1142 | && !pspace_info->inhibit_updates)) | |
a845f5cb | 1143 | { |
6c95b8df PA |
1144 | update_section_map (current_program_space, |
1145 | &pspace_info->sections, | |
1146 | &pspace_info->num_sections); | |
c906108c | 1147 | |
6c95b8df | 1148 | /* Don't need updates to section map until objfiles are added, |
dda83cd7 | 1149 | removed or relocated. */ |
607ece04 GB |
1150 | pspace_info->new_objfiles_available = 0; |
1151 | pspace_info->section_map_dirty = 0; | |
a845f5cb PP |
1152 | } |
1153 | ||
65a97ab3 PP |
1154 | /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to |
1155 | bsearch be non-NULL. */ | |
1156 | if (pspace_info->sections == NULL) | |
1157 | { | |
1158 | gdb_assert (pspace_info->num_sections == 0); | |
1159 | return NULL; | |
1160 | } | |
1161 | ||
6c95b8df PA |
1162 | sp = (struct obj_section **) bsearch (&pc, |
1163 | pspace_info->sections, | |
1164 | pspace_info->num_sections, | |
1165 | sizeof (*pspace_info->sections), | |
1166 | bsearch_cmp); | |
a845f5cb PP |
1167 | if (sp != NULL) |
1168 | return *sp; | |
714835d5 | 1169 | return NULL; |
c906108c | 1170 | } |
c5aa993b | 1171 | |
c906108c | 1172 | |
3e5d3a5a | 1173 | /* Return non-zero if PC is in a section called NAME. */ |
c906108c | 1174 | |
6ec27270 | 1175 | bool |
a121b7c1 | 1176 | pc_in_section (CORE_ADDR pc, const char *name) |
c906108c | 1177 | { |
6ec27270 TT |
1178 | struct obj_section *s = find_pc_section (pc); |
1179 | return (s != nullptr | |
1180 | && s->the_bfd_section->name != nullptr | |
1181 | && strcmp (s->the_bfd_section->name, name) == 0); | |
c906108c | 1182 | } |
0d0e1a63 MK |
1183 | \f |
1184 | ||
607ece04 | 1185 | /* Set section_map_dirty so section map will be rebuilt next time it |
bb272892 | 1186 | is used. Called by reread_symbols. */ |
a845f5cb PP |
1187 | |
1188 | void | |
bb272892 | 1189 | objfiles_changed (void) |
a845f5cb | 1190 | { |
6c95b8df | 1191 | /* Rebuild section map next time we need it. */ |
607ece04 GB |
1192 | get_objfile_pspace_data (current_program_space)->section_map_dirty = 1; |
1193 | } | |
1194 | ||
1195 | /* See comments in objfiles.h. */ | |
1196 | ||
06424eac | 1197 | scoped_restore_tmpl<int> |
607ece04 GB |
1198 | inhibit_section_map_updates (struct program_space *pspace) |
1199 | { | |
06424eac TT |
1200 | return scoped_restore_tmpl<int> |
1201 | (&get_objfile_pspace_data (pspace)->inhibit_updates, 1); | |
a845f5cb | 1202 | } |
e3c69974 | 1203 | |
02ff80c2 | 1204 | /* See objfiles.h. */ |
63644780 | 1205 | |
02ff80c2 | 1206 | bool |
63644780 NB |
1207 | is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile) |
1208 | { | |
63644780 | 1209 | if (objfile == NULL) |
02ff80c2 | 1210 | return false; |
63644780 | 1211 | |
5250cbc8 | 1212 | for (obj_section *osect : objfile->sections ()) |
63644780 NB |
1213 | { |
1214 | if (section_is_overlay (osect) && !section_is_mapped (osect)) | |
1215 | continue; | |
1216 | ||
0c1bcd23 | 1217 | if (osect->addr () <= addr && addr < osect->endaddr ()) |
02ff80c2 | 1218 | return true; |
63644780 | 1219 | } |
02ff80c2 | 1220 | return false; |
63644780 NB |
1221 | } |
1222 | ||
02ff80c2 SM |
1223 | /* See objfiles.h. */ |
1224 | ||
1225 | bool | |
d03de421 PA |
1226 | shared_objfile_contains_address_p (struct program_space *pspace, |
1227 | CORE_ADDR address) | |
08351840 | 1228 | { |
2030c079 | 1229 | for (objfile *objfile : pspace->objfiles ()) |
08351840 | 1230 | { |
d03de421 | 1231 | if ((objfile->flags & OBJF_SHARED) != 0 |
08351840 | 1232 | && is_addr_in_objfile (address, objfile)) |
02ff80c2 | 1233 | return true; |
08351840 PA |
1234 | } |
1235 | ||
02ff80c2 | 1236 | return false; |
08351840 PA |
1237 | } |
1238 | ||
19630284 | 1239 | /* The default implementation for the "iterate_over_objfiles_in_search_order" |
2030c079 | 1240 | gdbarch method. It is equivalent to use the objfiles iterable, |
19630284 JB |
1241 | searching the objfiles in the order they are stored internally, |
1242 | ignoring CURRENT_OBJFILE. | |
1243 | ||
85102364 | 1244 | On most platforms, it should be close enough to doing the best |
19630284 JB |
1245 | we can without some knowledge specific to the architecture. */ |
1246 | ||
1247 | void | |
1248 | default_iterate_over_objfiles_in_search_order | |
6e9cd73e SM |
1249 | (gdbarch *gdbarch, iterate_over_objfiles_in_search_order_cb_ftype cb, |
1250 | objfile *current_objfile) | |
19630284 | 1251 | { |
2030c079 | 1252 | for (objfile *objfile : current_program_space->objfiles ()) |
6e9cd73e SM |
1253 | if (cb (objfile)) |
1254 | return; | |
19630284 JB |
1255 | } |
1256 | ||
e02c96a7 | 1257 | /* See objfiles.h. */ |
4262abfb JK |
1258 | |
1259 | const char * | |
1260 | objfile_name (const struct objfile *objfile) | |
1261 | { | |
24ba069a | 1262 | if (objfile->obfd != NULL) |
98badbfd | 1263 | return bfd_get_filename (objfile->obfd.get ()); |
24ba069a | 1264 | |
4262abfb JK |
1265 | return objfile->original_name; |
1266 | } | |
1267 | ||
cc485e62 DE |
1268 | /* See objfiles.h. */ |
1269 | ||
e02c96a7 DE |
1270 | const char * |
1271 | objfile_filename (const struct objfile *objfile) | |
1272 | { | |
1273 | if (objfile->obfd != NULL) | |
98badbfd | 1274 | return bfd_get_filename (objfile->obfd.get ()); |
e02c96a7 DE |
1275 | |
1276 | return NULL; | |
1277 | } | |
1278 | ||
1279 | /* See objfiles.h. */ | |
1280 | ||
cc485e62 DE |
1281 | const char * |
1282 | objfile_debug_name (const struct objfile *objfile) | |
1283 | { | |
1284 | return lbasename (objfile->original_name); | |
1285 | } | |
1286 | ||
015d2e7e DE |
1287 | /* See objfiles.h. */ |
1288 | ||
1289 | const char * | |
1290 | objfile_flavour_name (struct objfile *objfile) | |
1291 | { | |
1292 | if (objfile->obfd != NULL) | |
98badbfd | 1293 | return bfd_flavour_name (bfd_get_flavour (objfile->obfd.get ())); |
015d2e7e DE |
1294 | return NULL; |
1295 | } | |
b3a01ce2 WP |
1296 | |
1297 | /* See objfiles.h. */ | |
1298 | ||
1299 | struct type * | |
1300 | objfile_int_type (struct objfile *of, int size_in_bytes, bool unsigned_p) | |
1301 | { | |
1302 | struct type *int_type; | |
1303 | ||
1304 | /* Helper macro to examine the various builtin types. */ | |
1305 | #define TRY_TYPE(F) \ | |
1306 | int_type = (unsigned_p \ | |
a8ed3dde TT |
1307 | ? builtin_type (of)->builtin_unsigned_ ## F \ |
1308 | : builtin_type (of)->builtin_ ## F); \ | |
df86565b | 1309 | if (int_type != NULL && int_type->length () == size_in_bytes) \ |
b3a01ce2 WP |
1310 | return int_type |
1311 | ||
1312 | TRY_TYPE (char); | |
1313 | TRY_TYPE (short); | |
1314 | TRY_TYPE (int); | |
1315 | TRY_TYPE (long); | |
1316 | TRY_TYPE (long_long); | |
1317 | ||
1318 | #undef TRY_TYPE | |
1319 | ||
1320 | gdb_assert_not_reached ("unable to find suitable integer type"); | |
1321 | } |