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Commit | Line | Data |
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c906108c | 1 | /* GDB routines for manipulating objfiles. |
af5f3db6 | 2 | |
1d506c26 | 3 | Copyright (C) 1992-2024 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 | 24 | |
ef0f16cc | 25 | #include "bfd.h" |
c906108c SS |
26 | #include "symtab.h" |
27 | #include "symfile.h" | |
28 | #include "objfiles.h" | |
c906108c | 29 | #include "target.h" |
9bdcbae7 DJ |
30 | #include "expression.h" |
31 | #include "parser-defs.h" | |
32 | ||
c906108c | 33 | #include <sys/types.h> |
53ce3c39 | 34 | #include <sys/stat.h> |
c906108c | 35 | #include <fcntl.h> |
bf31fd38 | 36 | #include "gdbsupport/gdb_obstack.h" |
2de7ced7 | 37 | #include "hashtab.h" |
c906108c | 38 | |
7a292a7a | 39 | #include "breakpoint.h" |
fe898f56 | 40 | #include "block.h" |
de4f826b | 41 | #include "dictionary.h" |
cb5d864f | 42 | #include "source.h" |
801e3a5b | 43 | #include "addrmap.h" |
5e2b427d | 44 | #include "arch-utils.h" |
30510692 | 45 | #include "exec.h" |
76727919 | 46 | #include "observable.h" |
6fbf07cd | 47 | #include "complaints.h" |
cbb099e8 | 48 | #include "gdb_bfd.h" |
afedecd3 | 49 | #include "btrace.h" |
268a13a5 | 50 | #include "gdbsupport/pathstuff.h" |
7a292a7a | 51 | |
d0801dd8 | 52 | #include <algorithm> |
cfe826d4 | 53 | |
c906108c | 54 | /* Externally visible variables that are owned by this module. |
0df8b418 | 55 | See declarations in objfile.h for more info. */ |
c906108c | 56 | |
6c95b8df PA |
57 | struct objfile_pspace_info |
58 | { | |
f6aa7436 TT |
59 | objfile_pspace_info () = default; |
60 | ~objfile_pspace_info (); | |
61 | ||
62 | struct obj_section **sections = nullptr; | |
63 | int num_sections = 0; | |
607ece04 GB |
64 | |
65 | /* Nonzero if object files have been added since the section map | |
66 | was last updated. */ | |
f6aa7436 | 67 | int new_objfiles_available = 0; |
607ece04 GB |
68 | |
69 | /* Nonzero if the section map MUST be updated before use. */ | |
f6aa7436 | 70 | int section_map_dirty = 0; |
607ece04 GB |
71 | |
72 | /* Nonzero if section map updates should be inhibited if possible. */ | |
f6aa7436 | 73 | int inhibit_updates = 0; |
6c95b8df PA |
74 | }; |
75 | ||
76 | /* Per-program-space data key. */ | |
08b8a139 | 77 | static const registry<program_space>::key<objfile_pspace_info> |
f6aa7436 | 78 | objfiles_pspace_data; |
6c95b8df | 79 | |
f6aa7436 | 80 | objfile_pspace_info::~objfile_pspace_info () |
6c95b8df | 81 | { |
f6aa7436 | 82 | xfree (sections); |
6c95b8df PA |
83 | } |
84 | ||
85 | /* Get the current svr4 data. If none is found yet, add it now. This | |
86 | function always returns a valid object. */ | |
87 | ||
88 | static struct objfile_pspace_info * | |
89 | get_objfile_pspace_data (struct program_space *pspace) | |
90 | { | |
91 | struct objfile_pspace_info *info; | |
92 | ||
f6aa7436 | 93 | info = objfiles_pspace_data.get (pspace); |
6c95b8df | 94 | if (info == NULL) |
f6aa7436 | 95 | info = objfiles_pspace_data.emplace (pspace); |
6c95b8df PA |
96 | |
97 | return info; | |
98 | } | |
99 | ||
706e3705 TT |
100 | \f |
101 | ||
102 | /* Per-BFD data key. */ | |
103 | ||
08b8a139 | 104 | static const registry<bfd>::key<objfile_per_bfd_storage> objfiles_bfd_data; |
706e3705 | 105 | |
d6797f46 TT |
106 | objfile_per_bfd_storage::~objfile_per_bfd_storage () |
107 | { | |
d6797f46 TT |
108 | } |
109 | ||
706e3705 TT |
110 | /* Create the per-BFD storage object for OBJFILE. If ABFD is not |
111 | NULL, and it already has a per-BFD storage object, use that. | |
9161c89a | 112 | Otherwise, allocate a new per-BFD storage object. */ |
706e3705 | 113 | |
88c4cce8 TT |
114 | void |
115 | set_objfile_per_bfd (struct objfile *objfile) | |
706e3705 | 116 | { |
88c4cce8 | 117 | bfd *abfd = objfile->obfd.get (); |
706e3705 TT |
118 | struct objfile_per_bfd_storage *storage = NULL; |
119 | ||
120 | if (abfd != NULL) | |
f6aa7436 | 121 | storage = objfiles_bfd_data.get (abfd); |
706e3705 TT |
122 | |
123 | if (storage == NULL) | |
124 | { | |
0072c873 | 125 | storage = new objfile_per_bfd_storage (abfd); |
1da77581 TT |
126 | /* If the object requires gdb to do relocations, we simply fall |
127 | back to not sharing data across users. These cases are rare | |
128 | enough that this seems reasonable. */ | |
129 | if (abfd != NULL && !gdb_bfd_requires_relocations (abfd)) | |
f6aa7436 | 130 | objfiles_bfd_data.set (abfd, storage); |
88c4cce8 TT |
131 | else |
132 | objfile->per_bfd_storage.reset (storage); | |
706e3705 | 133 | |
1da77581 TT |
134 | /* Look up the gdbarch associated with the BFD. */ |
135 | if (abfd != NULL) | |
136 | storage->gdbarch = gdbarch_from_bfd (abfd); | |
706e3705 TT |
137 | } |
138 | ||
88c4cce8 | 139 | objfile->per_bfd = storage; |
706e3705 TT |
140 | } |
141 | ||
3d548a53 TT |
142 | /* Set the objfile's per-BFD notion of the "main" name and |
143 | language. */ | |
144 | ||
145 | void | |
146 | set_objfile_main_name (struct objfile *objfile, | |
147 | const char *name, enum language lang) | |
148 | { | |
149 | if (objfile->per_bfd->name_of_main == NULL | |
150 | || strcmp (objfile->per_bfd->name_of_main, name) != 0) | |
151 | objfile->per_bfd->name_of_main | |
021887d8 | 152 | = obstack_strdup (&objfile->per_bfd->storage_obstack, name); |
3d548a53 TT |
153 | objfile->per_bfd->language_of_main = lang; |
154 | } | |
155 | ||
63e43d3a PMR |
156 | /* Helper structure to map blocks to static link properties in hash tables. */ |
157 | ||
158 | struct static_link_htab_entry | |
159 | { | |
160 | const struct block *block; | |
161 | const struct dynamic_prop *static_link; | |
162 | }; | |
163 | ||
164 | /* Return a hash code for struct static_link_htab_entry *P. */ | |
165 | ||
166 | static hashval_t | |
167 | static_link_htab_entry_hash (const void *p) | |
168 | { | |
169 | const struct static_link_htab_entry *e | |
170 | = (const struct static_link_htab_entry *) p; | |
171 | ||
172 | return htab_hash_pointer (e->block); | |
173 | } | |
174 | ||
175 | /* Return whether P1 an P2 (pointers to struct static_link_htab_entry) are | |
176 | mappings for the same block. */ | |
177 | ||
178 | static int | |
179 | static_link_htab_entry_eq (const void *p1, const void *p2) | |
180 | { | |
181 | const struct static_link_htab_entry *e1 | |
182 | = (const struct static_link_htab_entry *) p1; | |
183 | const struct static_link_htab_entry *e2 | |
184 | = (const struct static_link_htab_entry *) p2; | |
185 | ||
186 | return e1->block == e2->block; | |
187 | } | |
188 | ||
189 | /* Register STATIC_LINK as the static link for BLOCK, which is part of OBJFILE. | |
190 | Must not be called more than once for each BLOCK. */ | |
191 | ||
192 | void | |
193 | objfile_register_static_link (struct objfile *objfile, | |
194 | const struct block *block, | |
195 | const struct dynamic_prop *static_link) | |
196 | { | |
197 | void **slot; | |
198 | struct static_link_htab_entry lookup_entry; | |
199 | struct static_link_htab_entry *entry; | |
200 | ||
201 | if (objfile->static_links == NULL) | |
cf250e36 | 202 | objfile->static_links.reset (htab_create_alloc |
63e43d3a | 203 | (1, &static_link_htab_entry_hash, static_link_htab_entry_eq, NULL, |
cf250e36 | 204 | xcalloc, xfree)); |
63e43d3a PMR |
205 | |
206 | /* Create a slot for the mapping, make sure it's the first mapping for this | |
207 | block and then create the mapping itself. */ | |
208 | lookup_entry.block = block; | |
cf250e36 | 209 | slot = htab_find_slot (objfile->static_links.get (), &lookup_entry, INSERT); |
63e43d3a PMR |
210 | gdb_assert (*slot == NULL); |
211 | ||
e39db4db | 212 | entry = XOBNEW (&objfile->objfile_obstack, static_link_htab_entry); |
63e43d3a PMR |
213 | entry->block = block; |
214 | entry->static_link = static_link; | |
215 | *slot = (void *) entry; | |
216 | } | |
217 | ||
218 | /* Look for a static link for BLOCK, which is part of OBJFILE. Return NULL if | |
219 | none was found. */ | |
220 | ||
221 | const struct dynamic_prop * | |
222 | objfile_lookup_static_link (struct objfile *objfile, | |
223 | const struct block *block) | |
224 | { | |
225 | struct static_link_htab_entry *entry; | |
226 | struct static_link_htab_entry lookup_entry; | |
227 | ||
228 | if (objfile->static_links == NULL) | |
229 | return NULL; | |
230 | lookup_entry.block = block; | |
cf250e36 TT |
231 | entry = ((struct static_link_htab_entry *) |
232 | htab_find (objfile->static_links.get (), &lookup_entry)); | |
63e43d3a PMR |
233 | if (entry == NULL) |
234 | return NULL; | |
235 | ||
236 | gdb_assert (entry->block == block); | |
237 | return entry->static_link; | |
238 | } | |
239 | ||
706e3705 TT |
240 | \f |
241 | ||
cb814f2e TT |
242 | /* Build up the section table that the objfile references. The |
243 | objfile contains pointers to the start of the table | |
244 | (objfile->sections) and to the first location after the end of the | |
245 | table (objfile->sections_end). */ | |
96baa820 | 246 | |
65cf3563 | 247 | static void |
cb814f2e | 248 | add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
65cf3563 TT |
249 | struct objfile *objfile, int force) |
250 | { | |
251 | struct obj_section *section; | |
252 | ||
253 | if (!force) | |
254 | { | |
255 | flagword aflag; | |
256 | ||
fd361982 | 257 | aflag = bfd_section_flags (asect); |
65cf3563 TT |
258 | if (!(aflag & SEC_ALLOC)) |
259 | return; | |
260 | } | |
261 | ||
9ed8433a | 262 | section = &objfile->sections_start[gdb_bfd_section_index (abfd, asect)]; |
65cf3563 TT |
263 | section->objfile = objfile; |
264 | section->the_bfd_section = asect; | |
265 | section->ovly_mapped = 0; | |
266 | } | |
267 | ||
c906108c | 268 | /* Builds a section table for OBJFILE. |
96baa820 | 269 | |
65cf3563 TT |
270 | Note that the OFFSET and OVLY_MAPPED in each table entry are |
271 | initialized to zero. */ | |
c906108c | 272 | |
d82ea6a8 | 273 | void |
fba45db2 | 274 | build_objfile_section_table (struct objfile *objfile) |
c906108c | 275 | { |
98badbfd | 276 | int count = gdb_bfd_count_sections (objfile->obfd.get ()); |
65cf3563 | 277 | |
9ed8433a TT |
278 | objfile->sections_start = OBSTACK_CALLOC (&objfile->objfile_obstack, |
279 | count, | |
280 | struct obj_section); | |
281 | objfile->sections_end = (objfile->sections_start + count); | |
cb814f2e | 282 | for (asection *sect : gdb_bfd_sections (objfile->obfd)) |
98badbfd | 283 | add_to_objfile_sections (objfile->obfd.get (), sect, objfile, 0); |
65cf3563 TT |
284 | |
285 | /* See gdb_bfd_section_index. */ | |
98badbfd TT |
286 | add_to_objfile_sections (objfile->obfd.get (), bfd_com_section_ptr, |
287 | objfile, 1); | |
288 | add_to_objfile_sections (objfile->obfd.get (), bfd_und_section_ptr, | |
289 | objfile, 1); | |
290 | add_to_objfile_sections (objfile->obfd.get (), bfd_abs_section_ptr, | |
291 | objfile, 1); | |
292 | add_to_objfile_sections (objfile->obfd.get (), bfd_ind_section_ptr, | |
293 | objfile, 1); | |
c906108c SS |
294 | } |
295 | ||
9e86da07 TT |
296 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits, |
297 | initialize the new objfile as best we can and link it into the list | |
298 | of all known objfiles. | |
c906108c | 299 | |
24ba069a JK |
300 | NAME should contain original non-canonicalized filename or other |
301 | identifier as entered by user. If there is no better source use | |
302 | bfd_get_filename (ABFD). NAME may be NULL only if ABFD is NULL. | |
303 | NAME content is copied into returned objfile. | |
304 | ||
2df3850c | 305 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
78a4a9b9 | 306 | requests for specific operations. Other bits like OBJF_SHARED are |
0df8b418 | 307 | simply copied through to the new objfile flags member. */ |
c906108c | 308 | |
98badbfd | 309 | objfile::objfile (gdb_bfd_ref_ptr bfd_, const char *name, objfile_flags flags_) |
9e86da07 TT |
310 | : flags (flags_), |
311 | pspace (current_program_space), | |
98badbfd | 312 | obfd (std::move (bfd_)) |
c906108c | 313 | { |
14278e1f | 314 | const char *expanded_name; |
c906108c | 315 | |
7ab2607f | 316 | std::string name_holder; |
24ba069a JK |
317 | if (name == NULL) |
318 | { | |
98badbfd | 319 | gdb_assert (obfd == nullptr); |
40135bb1 | 320 | gdb_assert ((flags & OBJF_NOT_FILENAME) != 0); |
e3e41d58 | 321 | expanded_name = "<<anonymous objfile>>"; |
24ba069a | 322 | } |
5fbae7d1 GB |
323 | else if ((flags & OBJF_NOT_FILENAME) != 0 |
324 | || is_target_filename (name)) | |
e3e41d58 | 325 | expanded_name = name; |
04affae3 | 326 | else |
e3e41d58 TT |
327 | { |
328 | name_holder = gdb_abspath (name); | |
7ab2607f | 329 | expanded_name = name_holder.c_str (); |
e3e41d58 | 330 | } |
021887d8 | 331 | original_name = obstack_strdup (&objfile_obstack, expanded_name); |
04affae3 | 332 | |
d3e81981 DE |
333 | /* Update the per-objfile information that comes from the bfd, ensuring |
334 | that any data that is reference is saved in the per-objfile data | |
335 | region. */ | |
336 | ||
98badbfd | 337 | if (obfd != nullptr) |
c906108c | 338 | { |
98badbfd | 339 | mtime = bfd_get_mtime (obfd.get ()); |
c906108c SS |
340 | |
341 | /* Build section table. */ | |
9e86da07 | 342 | build_objfile_section_table (this); |
c906108c SS |
343 | } |
344 | ||
88c4cce8 | 345 | set_objfile_per_bfd (this); |
c906108c SS |
346 | } |
347 | ||
abd0a5fa JK |
348 | /* If there is a valid and known entry point, function fills *ENTRY_P with it |
349 | and returns non-zero; otherwise it returns zero. */ | |
9ab9195f | 350 | |
abd0a5fa JK |
351 | int |
352 | entry_point_address_query (CORE_ADDR *entry_p) | |
9ab9195f | 353 | { |
a42d7dd8 TT |
354 | objfile *objf = current_program_space->symfile_object_file; |
355 | if (objf == NULL || !objf->per_bfd->ei.entry_point_p) | |
3612b192 DJ |
356 | return 0; |
357 | ||
a42d7dd8 TT |
358 | int idx = objf->per_bfd->ei.the_bfd_section_index; |
359 | *entry_p = objf->per_bfd->ei.entry_point + objf->section_offsets[idx]; | |
3612b192 | 360 | |
abd0a5fa JK |
361 | return 1; |
362 | } | |
363 | ||
364 | /* Get current entry point address. Call error if it is not known. */ | |
365 | ||
366 | CORE_ADDR | |
367 | entry_point_address (void) | |
368 | { | |
369 | CORE_ADDR retval; | |
370 | ||
371 | if (!entry_point_address_query (&retval)) | |
372 | error (_("Entry point address is not known.")); | |
373 | ||
374 | return retval; | |
9ab9195f | 375 | } |
15831452 | 376 | |
e9ad22ee TT |
377 | separate_debug_iterator & |
378 | separate_debug_iterator::operator++ () | |
15d123c9 | 379 | { |
e9ad22ee TT |
380 | gdb_assert (m_objfile != nullptr); |
381 | ||
15d123c9 TG |
382 | struct objfile *res; |
383 | ||
399f313b | 384 | /* If any, return the first child. */ |
e9ad22ee TT |
385 | res = m_objfile->separate_debug_objfile; |
386 | if (res != nullptr) | |
387 | { | |
388 | m_objfile = res; | |
389 | return *this; | |
390 | } | |
15d123c9 | 391 | |
15d123c9 | 392 | /* Common case where there is no separate debug objfile. */ |
e9ad22ee TT |
393 | if (m_objfile == m_parent) |
394 | { | |
395 | m_objfile = nullptr; | |
396 | return *this; | |
397 | } | |
15d123c9 | 398 | |
399f313b TG |
399 | /* Return the brother if any. Note that we don't iterate on brothers of |
400 | the parents. */ | |
e9ad22ee TT |
401 | res = m_objfile->separate_debug_objfile_link; |
402 | if (res != nullptr) | |
403 | { | |
404 | m_objfile = res; | |
405 | return *this; | |
406 | } | |
399f313b | 407 | |
e9ad22ee TT |
408 | for (res = m_objfile->separate_debug_objfile_backlink; |
409 | res != m_parent; | |
15d123c9 TG |
410 | res = res->separate_debug_objfile_backlink) |
411 | { | |
e9ad22ee TT |
412 | gdb_assert (res != nullptr); |
413 | if (res->separate_debug_objfile_link != nullptr) | |
414 | { | |
415 | m_objfile = res->separate_debug_objfile_link; | |
416 | return *this; | |
417 | } | |
15d123c9 | 418 | } |
e9ad22ee TT |
419 | m_objfile = nullptr; |
420 | return *this; | |
15d123c9 | 421 | } |
15831452 | 422 | |
15d123c9 TG |
423 | /* Add OBJFILE as a separate debug objfile of PARENT. */ |
424 | ||
f65fe570 | 425 | static void |
15d123c9 TG |
426 | add_separate_debug_objfile (struct objfile *objfile, struct objfile *parent) |
427 | { | |
428 | gdb_assert (objfile && parent); | |
429 | ||
430 | /* Must not be already in a list. */ | |
431 | gdb_assert (objfile->separate_debug_objfile_backlink == NULL); | |
432 | gdb_assert (objfile->separate_debug_objfile_link == NULL); | |
8a92335b JK |
433 | gdb_assert (objfile->separate_debug_objfile == NULL); |
434 | gdb_assert (parent->separate_debug_objfile_backlink == NULL); | |
435 | gdb_assert (parent->separate_debug_objfile_link == NULL); | |
15d123c9 TG |
436 | |
437 | objfile->separate_debug_objfile_backlink = parent; | |
438 | objfile->separate_debug_objfile_link = parent->separate_debug_objfile; | |
439 | parent->separate_debug_objfile = objfile; | |
15d123c9 TG |
440 | } |
441 | ||
f65fe570 TT |
442 | /* See objfiles.h. */ |
443 | ||
444 | objfile * | |
98badbfd | 445 | objfile::make (gdb_bfd_ref_ptr bfd_, const char *name_, objfile_flags flags_, |
f65fe570 TT |
446 | objfile *parent) |
447 | { | |
98badbfd | 448 | objfile *result = new objfile (std::move (bfd_), name_, flags_); |
f65fe570 TT |
449 | if (parent != nullptr) |
450 | add_separate_debug_objfile (result, parent); | |
7cac64af | 451 | |
e2904e1f | 452 | current_program_space->add_objfile (std::unique_ptr<objfile> (result), |
7d7167ce | 453 | parent); |
7cac64af TT |
454 | |
455 | /* Rebuild section map next time we need it. */ | |
456 | get_objfile_pspace_data (current_program_space)->new_objfiles_available = 1; | |
457 | ||
f65fe570 TT |
458 | return result; |
459 | } | |
460 | ||
268e4f09 TT |
461 | /* See objfiles.h. */ |
462 | ||
463 | void | |
464 | objfile::unlink () | |
465 | { | |
23452926 | 466 | current_program_space->remove_objfile (this); |
268e4f09 TT |
467 | } |
468 | ||
15d123c9 TG |
469 | /* Free all separate debug objfile of OBJFILE, but don't free OBJFILE |
470 | itself. */ | |
471 | ||
472 | void | |
473 | free_objfile_separate_debug (struct objfile *objfile) | |
474 | { | |
475 | struct objfile *child; | |
476 | ||
477 | for (child = objfile->separate_debug_objfile; child;) | |
478 | { | |
479 | struct objfile *next_child = child->separate_debug_objfile_link; | |
268e4f09 | 480 | child->unlink (); |
15d123c9 TG |
481 | child = next_child; |
482 | } | |
483 | } | |
c906108c | 484 | |
7580e917 | 485 | /* Destroy an objfile and all the symtabs and psymtabs under it. */ |
c906108c | 486 | |
9e86da07 | 487 | objfile::~objfile () |
c906108c | 488 | { |
63644780 | 489 | /* First notify observers that this objfile is about to be freed. */ |
76727919 | 490 | gdb::observers::free_objfile.notify (this); |
63644780 | 491 | |
15d123c9 | 492 | /* Free all separate debug objfiles. */ |
9e86da07 | 493 | free_objfile_separate_debug (this); |
15d123c9 | 494 | |
9e86da07 | 495 | if (separate_debug_objfile_backlink) |
5b5d99cf JB |
496 | { |
497 | /* We freed the separate debug file, make sure the base objfile | |
498 | doesn't reference it. */ | |
15d123c9 TG |
499 | struct objfile *child; |
500 | ||
9e86da07 | 501 | child = separate_debug_objfile_backlink->separate_debug_objfile; |
15d123c9 | 502 | |
9e86da07 | 503 | if (child == this) |
dda83cd7 SM |
504 | { |
505 | /* THIS is the first child. */ | |
506 | separate_debug_objfile_backlink->separate_debug_objfile = | |
507 | separate_debug_objfile_link; | |
508 | } | |
15d123c9 | 509 | else |
dda83cd7 SM |
510 | { |
511 | /* Find THIS in the list. */ | |
512 | while (1) | |
513 | { | |
514 | if (child->separate_debug_objfile_link == this) | |
515 | { | |
516 | child->separate_debug_objfile_link = | |
517 | separate_debug_objfile_link; | |
518 | break; | |
519 | } | |
520 | child = child->separate_debug_objfile_link; | |
521 | gdb_assert (child); | |
522 | } | |
523 | } | |
5b5d99cf | 524 | } |
9e86da07 | 525 | |
ae5a43e0 DJ |
526 | /* Remove any references to this objfile in the global value |
527 | lists. */ | |
9e86da07 | 528 | preserve_values (this); |
ae5a43e0 | 529 | |
9f743ef6 JK |
530 | /* It still may reference data modules have associated with the objfile and |
531 | the symbol file data. */ | |
21f6be77 | 532 | forget_cached_source_info (); |
9f743ef6 | 533 | |
9e86da07 TT |
534 | breakpoint_free_objfile (this); |
535 | btrace_free_objfile (this); | |
2f202fde | 536 | |
c906108c SS |
537 | /* First do any symbol file specific actions required when we are |
538 | finished with a particular symbol file. Note that if the objfile | |
539 | is using reusable symbol information (via mmalloc) then each of | |
540 | these routines is responsible for doing the correct thing, either | |
541 | freeing things which are valid only during this particular gdb | |
0df8b418 | 542 | execution, or leaving them to be reused during the next one. */ |
c906108c | 543 | |
9e86da07 TT |
544 | if (sf != NULL) |
545 | (*sf->sym_finish) (this); | |
c906108c | 546 | |
c906108c SS |
547 | /* Before the symbol table code was redone to make it easier to |
548 | selectively load and remove information particular to a specific | |
549 | linkage unit, gdb used to do these things whenever the monolithic | |
550 | symbol table was blown away. How much still needs to be done | |
551 | is unknown, but we play it safe for now and keep each action until | |
0df8b418 | 552 | it is shown to be no longer needed. */ |
c5aa993b | 553 | |
cb5d864f FF |
554 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
555 | for example), so we need to call this here. */ | |
c906108c SS |
556 | clear_pc_function_cache (); |
557 | ||
cb5d864f | 558 | /* Check to see if the current_source_symtab belongs to this objfile, |
0df8b418 | 559 | and if so, call clear_current_source_symtab_and_line. */ |
cb5d864f FF |
560 | |
561 | { | |
562 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
cb5d864f | 563 | |
3c86fae3 | 564 | if (cursal.symtab && cursal.symtab->compunit ()->objfile () == this) |
00174a86 | 565 | clear_current_source_symtab_and_line (); |
cb5d864f FF |
566 | } |
567 | ||
6c95b8df | 568 | /* Rebuild section map next time we need it. */ |
9e86da07 | 569 | get_objfile_pspace_data (pspace)->section_map_dirty = 1; |
c906108c SS |
570 | } |
571 | ||
c906108c | 572 | \f |
34eaf542 TT |
573 | /* A helper function for objfile_relocate1 that relocates a single |
574 | symbol. */ | |
575 | ||
576 | static void | |
577 | relocate_one_symbol (struct symbol *sym, struct objfile *objfile, | |
6a053cb1 | 578 | const section_offsets &delta) |
34eaf542 | 579 | { |
34eaf542 TT |
580 | /* The RS6000 code from which this was taken skipped |
581 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. | |
582 | But I'm leaving out that test, on the theory that | |
583 | they can't possibly pass the tests below. */ | |
66d7f48f SM |
584 | if ((sym->aclass () == LOC_LABEL |
585 | || sym->aclass () == LOC_STATIC) | |
a52d653e | 586 | && sym->section_index () >= 0) |
4aeddc50 SM |
587 | sym->set_value_address (sym->value_address () |
588 | + delta[sym->section_index ()]); | |
34eaf542 TT |
589 | } |
590 | ||
c906108c | 591 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS |
b260e109 JK |
592 | entries in new_offsets. SEPARATE_DEBUG_OBJFILE is not touched here. |
593 | Return non-zero iff any change happened. */ | |
567995e1 | 594 | |
b260e109 | 595 | static int |
5cc80db3 | 596 | objfile_relocate1 (struct objfile *objfile, |
6a053cb1 | 597 | const section_offsets &new_offsets) |
c906108c | 598 | { |
6a053cb1 | 599 | section_offsets delta (objfile->section_offsets.size ()); |
c906108c | 600 | |
5cc80db3 MS |
601 | int something_changed = 0; |
602 | ||
6a053cb1 | 603 | for (int i = 0; i < objfile->section_offsets.size (); ++i) |
5cc80db3 | 604 | { |
6a053cb1 TT |
605 | delta[i] = new_offsets[i] - objfile->section_offsets[i]; |
606 | if (delta[i] != 0) | |
5cc80db3 MS |
607 | something_changed = 1; |
608 | } | |
609 | if (!something_changed) | |
610 | return 0; | |
c906108c SS |
611 | |
612 | /* OK, get all the symtabs. */ | |
82c5090c TT |
613 | for (compunit_symtab *cust : objfile->compunits ()) |
614 | { | |
615 | struct blockvector *bv = cust->blockvector (); | |
616 | int block_line_section = SECT_OFF_TEXT (objfile); | |
c906108c | 617 | |
82c5090c TT |
618 | if (bv->map () != nullptr) |
619 | bv->map ()->relocate (delta[block_line_section]); | |
34eaf542 | 620 | |
82c5090c TT |
621 | for (block *b : bv->blocks ()) |
622 | { | |
82c5090c TT |
623 | b->set_start (b->start () + delta[block_line_section]); |
624 | b->set_end (b->end () + delta[block_line_section]); | |
5cc80db3 | 625 | |
82c5090c TT |
626 | for (blockrange &r : b->ranges ()) |
627 | { | |
628 | r.set_start (r.start () + delta[block_line_section]); | |
629 | r.set_end (r.end () + delta[block_line_section]); | |
630 | } | |
631 | ||
632 | /* We only want to iterate over the local symbols, not any | |
633 | symbols in included symtabs. */ | |
8e8d48f9 TT |
634 | for (struct symbol *sym : b->multidict_symbols ()) |
635 | relocate_one_symbol (sym, objfile, delta); | |
82c5090c TT |
636 | } |
637 | } | |
638 | ||
639 | /* Relocate isolated symbols. */ | |
640 | for (symbol *iter = objfile->template_symbols; iter; iter = iter->hash_next) | |
641 | relocate_one_symbol (iter, objfile, delta); | |
642 | ||
643 | for (int i = 0; i < objfile->section_offsets.size (); ++i) | |
644 | objfile->section_offsets[i] = new_offsets[i]; | |
f1f2b5f4 PA |
645 | |
646 | /* Rebuild section map next time we need it. */ | |
607ece04 | 647 | get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1; |
f1f2b5f4 | 648 | |
30510692 | 649 | /* Update the table in exec_ops, used to read memory. */ |
5250cbc8 | 650 | for (obj_section *s : objfile->sections ()) |
30510692 | 651 | { |
9ed8433a | 652 | int idx = s - objfile->sections_start; |
30510692 | 653 | |
98badbfd | 654 | exec_set_section_address (bfd_get_filename (objfile->obfd.get ()), idx, |
0c1bcd23 | 655 | s->addr ()); |
30510692 | 656 | } |
b260e109 JK |
657 | |
658 | /* Data changed. */ | |
659 | return 1; | |
567995e1 JK |
660 | } |
661 | ||
662 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
663 | entries in new_offsets. Process also OBJFILE's SEPARATE_DEBUG_OBJFILEs. | |
664 | ||
665 | The number and ordering of sections does differ between the two objfiles. | |
666 | Only their names match. Also the file offsets will differ (objfile being | |
667 | possibly prelinked but separate_debug_objfile is probably not prelinked) but | |
668 | the in-memory absolute address as specified by NEW_OFFSETS must match both | |
669 | files. */ | |
670 | ||
671 | void | |
3189cb12 | 672 | objfile_relocate (struct objfile *objfile, |
6a053cb1 | 673 | const section_offsets &new_offsets) |
567995e1 | 674 | { |
b260e109 | 675 | int changed = 0; |
567995e1 | 676 | |
b260e109 | 677 | changed |= objfile_relocate1 (objfile, new_offsets); |
567995e1 | 678 | |
bde09ab7 | 679 | for (::objfile *debug_objfile : objfile->separate_debug_objfiles ()) |
567995e1 | 680 | { |
e9ad22ee TT |
681 | if (debug_objfile == objfile) |
682 | continue; | |
683 | ||
37e136b1 TT |
684 | section_addr_info objfile_addrs |
685 | = build_section_addr_info_from_objfile (objfile); | |
567995e1 JK |
686 | |
687 | /* Here OBJFILE_ADDRS contain the correct absolute addresses, the | |
688 | relative ones must be already created according to debug_objfile. */ | |
689 | ||
98badbfd | 690 | addr_info_make_relative (&objfile_addrs, debug_objfile->obfd.get ()); |
567995e1 | 691 | |
6a053cb1 | 692 | gdb_assert (debug_objfile->section_offsets.size () |
98badbfd | 693 | == gdb_bfd_count_sections (debug_objfile->obfd.get ())); |
6a053cb1 TT |
694 | section_offsets new_debug_offsets |
695 | (debug_objfile->section_offsets.size ()); | |
696 | relative_addr_info_to_section_offsets (new_debug_offsets, objfile_addrs); | |
567995e1 | 697 | |
6a053cb1 | 698 | changed |= objfile_relocate1 (debug_objfile, new_debug_offsets); |
567995e1 | 699 | } |
30510692 | 700 | |
0df8b418 | 701 | /* Relocate breakpoints as necessary, after things are relocated. */ |
b260e109 JK |
702 | if (changed) |
703 | breakpoint_re_set (); | |
c906108c | 704 | } |
4141a416 JB |
705 | |
706 | /* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is | |
707 | not touched here. | |
708 | Return non-zero iff any change happened. */ | |
709 | ||
710 | static int | |
711 | objfile_rebase1 (struct objfile *objfile, CORE_ADDR slide) | |
712 | { | |
6a053cb1 | 713 | section_offsets new_offsets (objfile->section_offsets.size (), slide); |
4141a416 JB |
714 | return objfile_relocate1 (objfile, new_offsets); |
715 | } | |
716 | ||
717 | /* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's | |
718 | SEPARATE_DEBUG_OBJFILEs. */ | |
719 | ||
720 | void | |
721 | objfile_rebase (struct objfile *objfile, CORE_ADDR slide) | |
722 | { | |
4141a416 JB |
723 | int changed = 0; |
724 | ||
bde09ab7 | 725 | for (::objfile *debug_objfile : objfile->separate_debug_objfiles ()) |
4141a416 JB |
726 | changed |= objfile_rebase1 (debug_objfile, slide); |
727 | ||
728 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
729 | if (changed) | |
730 | breakpoint_re_set (); | |
731 | } | |
c906108c | 732 | \f |
55333a84 DE |
733 | /* Return non-zero if OBJFILE has full symbols. */ |
734 | ||
735 | int | |
736 | objfile_has_full_symbols (struct objfile *objfile) | |
737 | { | |
43f3e411 | 738 | return objfile->compunit_symtabs != NULL; |
55333a84 DE |
739 | } |
740 | ||
e361b228 | 741 | /* Return non-zero if OBJFILE has full or partial symbols, either directly |
15d123c9 | 742 | or through a separate debug file. */ |
e361b228 TG |
743 | |
744 | int | |
745 | objfile_has_symbols (struct objfile *objfile) | |
746 | { | |
bde09ab7 | 747 | for (::objfile *o : objfile->separate_debug_objfiles ()) |
a8ad4f3c | 748 | if (o->has_partial_symbols () || objfile_has_full_symbols (o)) |
15d123c9 | 749 | return 1; |
e361b228 TG |
750 | return 0; |
751 | } | |
752 | ||
753 | ||
c906108c SS |
754 | /* Many places in gdb want to test just to see if we have any partial |
755 | symbols available. This function returns zero if none are currently | |
0df8b418 | 756 | available, nonzero otherwise. */ |
c906108c SS |
757 | |
758 | int | |
fba45db2 | 759 | have_partial_symbols (void) |
c906108c | 760 | { |
2030c079 | 761 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 | 762 | { |
a8ad4f3c | 763 | if (ofp->has_partial_symbols ()) |
aed57c53 TT |
764 | return 1; |
765 | } | |
c906108c SS |
766 | return 0; |
767 | } | |
768 | ||
769 | /* Many places in gdb want to test just to see if we have any full | |
770 | symbols available. This function returns zero if none are currently | |
0df8b418 | 771 | available, nonzero otherwise. */ |
c906108c SS |
772 | |
773 | int | |
fba45db2 | 774 | have_full_symbols (void) |
c906108c | 775 | { |
2030c079 | 776 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 TT |
777 | { |
778 | if (objfile_has_full_symbols (ofp)) | |
779 | return 1; | |
780 | } | |
c906108c SS |
781 | return 0; |
782 | } | |
783 | ||
784 | ||
785 | /* This operations deletes all objfile entries that represent solibs that | |
786 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
0df8b418 MS |
787 | command. */ |
788 | ||
c906108c | 789 | void |
fba45db2 | 790 | objfile_purge_solibs (void) |
c906108c | 791 | { |
7e955d83 | 792 | for (objfile *objf : current_program_space->objfiles_safe ()) |
cac85af2 TT |
793 | { |
794 | /* We assume that the solib package has been purged already, or will | |
795 | be soon. */ | |
0df8b418 | 796 | |
cac85af2 | 797 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
268e4f09 | 798 | objf->unlink (); |
cac85af2 | 799 | } |
c906108c SS |
800 | } |
801 | ||
802 | ||
803 | /* Many places in gdb want to test just to see if we have any minimal | |
804 | symbols available. This function returns zero if none are currently | |
0df8b418 | 805 | available, nonzero otherwise. */ |
c906108c SS |
806 | |
807 | int | |
fba45db2 | 808 | have_minimal_symbols (void) |
c906108c | 809 | { |
2030c079 | 810 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 TT |
811 | { |
812 | if (ofp->per_bfd->minimal_symbol_count > 0) | |
813 | { | |
814 | return 1; | |
815 | } | |
816 | } | |
c906108c SS |
817 | return 0; |
818 | } | |
819 | ||
a845f5cb PP |
820 | /* Qsort comparison function. */ |
821 | ||
39ef2f62 CB |
822 | static bool |
823 | sort_cmp (const struct obj_section *sect1, const obj_section *sect2) | |
a845f5cb | 824 | { |
0c1bcd23 SM |
825 | const CORE_ADDR sect1_addr = sect1->addr (); |
826 | const CORE_ADDR sect2_addr = sect2->addr (); | |
a845f5cb PP |
827 | |
828 | if (sect1_addr < sect2_addr) | |
39ef2f62 | 829 | return true; |
a845f5cb | 830 | else if (sect1_addr > sect2_addr) |
39ef2f62 | 831 | return false; |
6fbf07cd | 832 | else |
5cc80db3 MS |
833 | { |
834 | /* Sections are at the same address. This could happen if | |
835 | A) we have an objfile and a separate debuginfo. | |
836 | B) we are confused, and have added sections without proper relocation, | |
0df8b418 | 837 | or something like that. */ |
5cc80db3 MS |
838 | |
839 | const struct objfile *const objfile1 = sect1->objfile; | |
840 | const struct objfile *const objfile2 = sect2->objfile; | |
841 | ||
842 | if (objfile1->separate_debug_objfile == objfile2 | |
843 | || objfile2->separate_debug_objfile == objfile1) | |
844 | { | |
845 | /* Case A. The ordering doesn't matter: separate debuginfo files | |
846 | will be filtered out later. */ | |
847 | ||
39ef2f62 | 848 | return false; |
5cc80db3 MS |
849 | } |
850 | ||
851 | /* Case B. Maintain stable sort order, so bugs in GDB are easier to | |
852 | triage. This section could be slow (since we iterate over all | |
39ef2f62 | 853 | objfiles in each call to sort_cmp), but this shouldn't happen |
5cc80db3 MS |
854 | very often (GDB is already in a confused state; one hopes this |
855 | doesn't happen at all). If you discover that significant time is | |
856 | spent in the loops below, do 'set complaints 100' and examine the | |
857 | resulting complaints. */ | |
5cc80db3 MS |
858 | if (objfile1 == objfile2) |
859 | { | |
45f47c3a AB |
860 | /* Both sections came from the same objfile. We are really |
861 | confused. Sort on sequence order of sections within the | |
862 | objfile. The order of checks is important here, if we find a | |
863 | match on SECT2 first then either SECT2 is before SECT1, or, | |
864 | SECT2 == SECT1, in both cases we should return false. The | |
865 | second case shouldn't occur during normal use, but std::sort | |
866 | does check that '!(a < a)' when compiled in debug mode. */ | |
5cc80db3 | 867 | |
5250cbc8 | 868 | for (const obj_section *osect : objfile1->sections ()) |
45f47c3a | 869 | if (osect == sect2) |
39ef2f62 | 870 | return false; |
45f47c3a AB |
871 | else if (osect == sect1) |
872 | return true; | |
5cc80db3 MS |
873 | |
874 | /* We should have found one of the sections before getting here. */ | |
f3574227 | 875 | gdb_assert_not_reached ("section not found"); |
5cc80db3 MS |
876 | } |
877 | else | |
878 | { | |
879 | /* Sort on sequence number of the objfile in the chain. */ | |
880 | ||
2030c079 | 881 | for (objfile *objfile : current_program_space->objfiles ()) |
5cc80db3 | 882 | if (objfile == objfile1) |
39ef2f62 | 883 | return true; |
5cc80db3 | 884 | else if (objfile == objfile2) |
39ef2f62 | 885 | return false; |
5cc80db3 MS |
886 | |
887 | /* We should have found one of the objfiles before getting here. */ | |
f3574227 | 888 | gdb_assert_not_reached ("objfile not found"); |
5cc80db3 MS |
889 | } |
890 | } | |
6fbf07cd PP |
891 | |
892 | /* Unreachable. */ | |
f3574227 | 893 | gdb_assert_not_reached ("unexpected code path"); |
39ef2f62 | 894 | return false; |
a845f5cb PP |
895 | } |
896 | ||
3aad21cf PP |
897 | /* Select "better" obj_section to keep. We prefer the one that came from |
898 | the real object, rather than the one from separate debuginfo. | |
899 | Most of the time the two sections are exactly identical, but with | |
900 | prelinking the .rel.dyn section in the real object may have different | |
901 | size. */ | |
902 | ||
903 | static struct obj_section * | |
904 | preferred_obj_section (struct obj_section *a, struct obj_section *b) | |
905 | { | |
0c1bcd23 | 906 | gdb_assert (a->addr () == b->addr ()); |
3aad21cf PP |
907 | gdb_assert ((a->objfile->separate_debug_objfile == b->objfile) |
908 | || (b->objfile->separate_debug_objfile == a->objfile)); | |
909 | gdb_assert ((a->objfile->separate_debug_objfile_backlink == b->objfile) | |
910 | || (b->objfile->separate_debug_objfile_backlink == a->objfile)); | |
911 | ||
912 | if (a->objfile->separate_debug_objfile != NULL) | |
913 | return a; | |
914 | return b; | |
915 | } | |
916 | ||
6fbf07cd | 917 | /* Return 1 if SECTION should be inserted into the section map. |
625b6eae | 918 | We want to insert only non-overlay non-TLS non-empty sections. */ |
6fbf07cd PP |
919 | |
920 | static int | |
921 | insert_section_p (const struct bfd *abfd, | |
922 | const struct bfd_section *section) | |
923 | { | |
fd361982 | 924 | const bfd_vma lma = bfd_section_lma (section); |
6fbf07cd | 925 | |
fd361982 | 926 | if (overlay_debugging && lma != 0 && lma != bfd_section_vma (section) |
6fbf07cd PP |
927 | && (bfd_get_file_flags (abfd) & BFD_IN_MEMORY) == 0) |
928 | /* This is an overlay section. IN_MEMORY check is needed to avoid | |
929 | discarding sections from the "system supplied DSO" (aka vdso) | |
930 | on some Linux systems (e.g. Fedora 11). */ | |
931 | return 0; | |
fd361982 | 932 | if ((bfd_section_flags (section) & SEC_THREAD_LOCAL) != 0) |
6fbf07cd PP |
933 | /* This is a TLS section. */ |
934 | return 0; | |
625b6eae IL |
935 | if (bfd_section_size (section) == 0) |
936 | { | |
937 | /* This is an empty section. It has no PCs for find_pc_section (), so | |
938 | there is no reason to insert it into the section map. */ | |
939 | return 0; | |
940 | } | |
6fbf07cd PP |
941 | |
942 | return 1; | |
943 | } | |
944 | ||
945 | /* Filter out overlapping sections where one section came from the real | |
946 | objfile, and the other from a separate debuginfo file. | |
947 | Return the size of table after redundant sections have been eliminated. */ | |
948 | ||
949 | static int | |
950 | filter_debuginfo_sections (struct obj_section **map, int map_size) | |
951 | { | |
952 | int i, j; | |
953 | ||
954 | for (i = 0, j = 0; i < map_size - 1; i++) | |
955 | { | |
956 | struct obj_section *const sect1 = map[i]; | |
957 | struct obj_section *const sect2 = map[i + 1]; | |
958 | const struct objfile *const objfile1 = sect1->objfile; | |
959 | const struct objfile *const objfile2 = sect2->objfile; | |
0c1bcd23 SM |
960 | const CORE_ADDR sect1_addr = sect1->addr (); |
961 | const CORE_ADDR sect2_addr = sect2->addr (); | |
6fbf07cd PP |
962 | |
963 | if (sect1_addr == sect2_addr | |
964 | && (objfile1->separate_debug_objfile == objfile2 | |
965 | || objfile2->separate_debug_objfile == objfile1)) | |
966 | { | |
967 | map[j++] = preferred_obj_section (sect1, sect2); | |
968 | ++i; | |
969 | } | |
970 | else | |
971 | map[j++] = sect1; | |
972 | } | |
973 | ||
974 | if (i < map_size) | |
975 | { | |
976 | gdb_assert (i == map_size - 1); | |
977 | map[j++] = map[i]; | |
978 | } | |
979 | ||
980 | /* The map should not have shrunk to less than half the original size. */ | |
981 | gdb_assert (map_size / 2 <= j); | |
982 | ||
983 | return j; | |
984 | } | |
985 | ||
986 | /* Filter out overlapping sections, issuing a warning if any are found. | |
987 | Overlapping sections could really be overlay sections which we didn't | |
988 | classify as such in insert_section_p, or we could be dealing with a | |
989 | corrupt binary. */ | |
990 | ||
991 | static int | |
992 | filter_overlapping_sections (struct obj_section **map, int map_size) | |
993 | { | |
994 | int i, j; | |
995 | ||
996 | for (i = 0, j = 0; i < map_size - 1; ) | |
997 | { | |
998 | int k; | |
999 | ||
1000 | map[j++] = map[i]; | |
1001 | for (k = i + 1; k < map_size; k++) | |
1002 | { | |
1003 | struct obj_section *const sect1 = map[i]; | |
1004 | struct obj_section *const sect2 = map[k]; | |
0c1bcd23 SM |
1005 | const CORE_ADDR sect1_addr = sect1->addr (); |
1006 | const CORE_ADDR sect2_addr = sect2->addr (); | |
1007 | const CORE_ADDR sect1_endaddr = sect1->endaddr (); | |
6fbf07cd PP |
1008 | |
1009 | gdb_assert (sect1_addr <= sect2_addr); | |
1010 | ||
1011 | if (sect1_endaddr <= sect2_addr) | |
1012 | break; | |
1013 | else | |
1014 | { | |
1015 | /* We have an overlap. Report it. */ | |
1016 | ||
1017 | struct objfile *const objf1 = sect1->objfile; | |
1018 | struct objfile *const objf2 = sect2->objfile; | |
1019 | ||
6fbf07cd PP |
1020 | const struct bfd_section *const bfds1 = sect1->the_bfd_section; |
1021 | const struct bfd_section *const bfds2 = sect2->the_bfd_section; | |
1022 | ||
0c1bcd23 | 1023 | const CORE_ADDR sect2_endaddr = sect2->endaddr (); |
6fbf07cd | 1024 | |
08feed99 | 1025 | struct gdbarch *const gdbarch = objf1->arch (); |
6fbf07cd | 1026 | |
b98664d3 | 1027 | complaint (_("unexpected overlap between:\n" |
6fbf07cd PP |
1028 | " (A) section `%s' from `%s' [%s, %s)\n" |
1029 | " (B) section `%s' from `%s' [%s, %s).\n" | |
1030 | "Will ignore section B"), | |
fd361982 | 1031 | bfd_section_name (bfds1), objfile_name (objf1), |
6fbf07cd PP |
1032 | paddress (gdbarch, sect1_addr), |
1033 | paddress (gdbarch, sect1_endaddr), | |
fd361982 | 1034 | bfd_section_name (bfds2), objfile_name (objf2), |
6fbf07cd PP |
1035 | paddress (gdbarch, sect2_addr), |
1036 | paddress (gdbarch, sect2_endaddr)); | |
1037 | } | |
1038 | } | |
1039 | i = k; | |
1040 | } | |
1041 | ||
1042 | if (i < map_size) | |
1043 | { | |
1044 | gdb_assert (i == map_size - 1); | |
1045 | map[j++] = map[i]; | |
1046 | } | |
1047 | ||
1048 | return j; | |
1049 | } | |
1050 | ||
1051 | ||
1052 | /* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any | |
1053 | TLS, overlay and overlapping sections. */ | |
a845f5cb PP |
1054 | |
1055 | static void | |
6c95b8df PA |
1056 | update_section_map (struct program_space *pspace, |
1057 | struct obj_section ***pmap, int *pmap_size) | |
a845f5cb | 1058 | { |
607ece04 | 1059 | struct objfile_pspace_info *pspace_info; |
6fbf07cd | 1060 | int alloc_size, map_size, i; |
5250cbc8 | 1061 | struct obj_section **map; |
a845f5cb | 1062 | |
607ece04 GB |
1063 | pspace_info = get_objfile_pspace_data (pspace); |
1064 | gdb_assert (pspace_info->section_map_dirty != 0 | |
1065 | || pspace_info->new_objfiles_available != 0); | |
a845f5cb PP |
1066 | |
1067 | map = *pmap; | |
1068 | xfree (map); | |
1069 | ||
6fbf07cd | 1070 | alloc_size = 0; |
2030c079 | 1071 | for (objfile *objfile : pspace->objfiles ()) |
5250cbc8 | 1072 | for (obj_section *s : objfile->sections ()) |
98badbfd | 1073 | if (insert_section_p (objfile->obfd.get (), s->the_bfd_section)) |
6c95b8df | 1074 | alloc_size += 1; |
a845f5cb | 1075 | |
65a97ab3 PP |
1076 | /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */ |
1077 | if (alloc_size == 0) | |
1078 | { | |
1079 | *pmap = NULL; | |
1080 | *pmap_size = 0; | |
1081 | return; | |
1082 | } | |
1083 | ||
8d749320 | 1084 | map = XNEWVEC (struct obj_section *, alloc_size); |
a845f5cb | 1085 | |
3aad21cf | 1086 | i = 0; |
2030c079 | 1087 | for (objfile *objfile : pspace->objfiles ()) |
5250cbc8 | 1088 | for (obj_section *s : objfile->sections ()) |
98badbfd | 1089 | if (insert_section_p (objfile->obfd.get (), s->the_bfd_section)) |
6c95b8df | 1090 | map[i++] = s; |
a845f5cb | 1091 | |
39ef2f62 | 1092 | std::sort (map, map + alloc_size, sort_cmp); |
6fbf07cd PP |
1093 | map_size = filter_debuginfo_sections(map, alloc_size); |
1094 | map_size = filter_overlapping_sections(map, map_size); | |
a845f5cb | 1095 | |
6fbf07cd PP |
1096 | if (map_size < alloc_size) |
1097 | /* Some sections were eliminated. Trim excess space. */ | |
224c3ddb | 1098 | map = XRESIZEVEC (struct obj_section *, map, map_size); |
3aad21cf | 1099 | else |
6fbf07cd | 1100 | gdb_assert (alloc_size == map_size); |
3aad21cf | 1101 | |
a845f5cb PP |
1102 | *pmap = map; |
1103 | *pmap_size = map_size; | |
1104 | } | |
1105 | ||
0df8b418 | 1106 | /* Bsearch comparison function. */ |
a845f5cb PP |
1107 | |
1108 | static int | |
1109 | bsearch_cmp (const void *key, const void *elt) | |
1110 | { | |
1111 | const CORE_ADDR pc = *(CORE_ADDR *) key; | |
1112 | const struct obj_section *section = *(const struct obj_section **) elt; | |
1113 | ||
0c1bcd23 | 1114 | if (pc < section->addr ()) |
a845f5cb | 1115 | return -1; |
0c1bcd23 | 1116 | if (pc < section->endaddr ()) |
a845f5cb PP |
1117 | return 0; |
1118 | return 1; | |
1119 | } | |
1120 | ||
714835d5 | 1121 | /* Returns a section whose range includes PC or NULL if none found. */ |
c906108c SS |
1122 | |
1123 | struct obj_section * | |
714835d5 | 1124 | find_pc_section (CORE_ADDR pc) |
c906108c | 1125 | { |
6c95b8df | 1126 | struct objfile_pspace_info *pspace_info; |
a845f5cb | 1127 | struct obj_section *s, **sp; |
c5aa993b | 1128 | |
714835d5 UW |
1129 | /* Check for mapped overlay section first. */ |
1130 | s = find_pc_mapped_section (pc); | |
1131 | if (s) | |
1132 | return s; | |
c906108c | 1133 | |
6c95b8df | 1134 | pspace_info = get_objfile_pspace_data (current_program_space); |
607ece04 GB |
1135 | if (pspace_info->section_map_dirty |
1136 | || (pspace_info->new_objfiles_available | |
1137 | && !pspace_info->inhibit_updates)) | |
a845f5cb | 1138 | { |
6c95b8df PA |
1139 | update_section_map (current_program_space, |
1140 | &pspace_info->sections, | |
1141 | &pspace_info->num_sections); | |
c906108c | 1142 | |
6c95b8df | 1143 | /* Don't need updates to section map until objfiles are added, |
dda83cd7 | 1144 | removed or relocated. */ |
607ece04 GB |
1145 | pspace_info->new_objfiles_available = 0; |
1146 | pspace_info->section_map_dirty = 0; | |
a845f5cb PP |
1147 | } |
1148 | ||
65a97ab3 PP |
1149 | /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to |
1150 | bsearch be non-NULL. */ | |
1151 | if (pspace_info->sections == NULL) | |
1152 | { | |
1153 | gdb_assert (pspace_info->num_sections == 0); | |
1154 | return NULL; | |
1155 | } | |
1156 | ||
6c95b8df PA |
1157 | sp = (struct obj_section **) bsearch (&pc, |
1158 | pspace_info->sections, | |
1159 | pspace_info->num_sections, | |
1160 | sizeof (*pspace_info->sections), | |
1161 | bsearch_cmp); | |
a845f5cb PP |
1162 | if (sp != NULL) |
1163 | return *sp; | |
714835d5 | 1164 | return NULL; |
c906108c | 1165 | } |
c5aa993b | 1166 | |
c906108c | 1167 | |
3e5d3a5a | 1168 | /* Return non-zero if PC is in a section called NAME. */ |
c906108c | 1169 | |
6ec27270 | 1170 | bool |
a121b7c1 | 1171 | pc_in_section (CORE_ADDR pc, const char *name) |
c906108c | 1172 | { |
6ec27270 TT |
1173 | struct obj_section *s = find_pc_section (pc); |
1174 | return (s != nullptr | |
1175 | && s->the_bfd_section->name != nullptr | |
1176 | && strcmp (s->the_bfd_section->name, name) == 0); | |
c906108c | 1177 | } |
0d0e1a63 MK |
1178 | \f |
1179 | ||
607ece04 | 1180 | /* Set section_map_dirty so section map will be rebuilt next time it |
bb272892 | 1181 | is used. Called by reread_symbols. */ |
a845f5cb PP |
1182 | |
1183 | void | |
bb272892 | 1184 | objfiles_changed (void) |
a845f5cb | 1185 | { |
6c95b8df | 1186 | /* Rebuild section map next time we need it. */ |
607ece04 GB |
1187 | get_objfile_pspace_data (current_program_space)->section_map_dirty = 1; |
1188 | } | |
1189 | ||
1190 | /* See comments in objfiles.h. */ | |
1191 | ||
06424eac | 1192 | scoped_restore_tmpl<int> |
607ece04 GB |
1193 | inhibit_section_map_updates (struct program_space *pspace) |
1194 | { | |
06424eac TT |
1195 | return scoped_restore_tmpl<int> |
1196 | (&get_objfile_pspace_data (pspace)->inhibit_updates, 1); | |
a845f5cb | 1197 | } |
e3c69974 | 1198 | |
02ff80c2 | 1199 | /* See objfiles.h. */ |
63644780 | 1200 | |
02ff80c2 | 1201 | bool |
63644780 NB |
1202 | is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile) |
1203 | { | |
63644780 | 1204 | if (objfile == NULL) |
02ff80c2 | 1205 | return false; |
63644780 | 1206 | |
5250cbc8 | 1207 | for (obj_section *osect : objfile->sections ()) |
63644780 NB |
1208 | { |
1209 | if (section_is_overlay (osect) && !section_is_mapped (osect)) | |
1210 | continue; | |
1211 | ||
94a75b03 | 1212 | if (osect->contains (addr)) |
02ff80c2 | 1213 | return true; |
63644780 | 1214 | } |
02ff80c2 | 1215 | return false; |
63644780 NB |
1216 | } |
1217 | ||
02ff80c2 SM |
1218 | /* See objfiles.h. */ |
1219 | ||
1220 | bool | |
d03de421 PA |
1221 | shared_objfile_contains_address_p (struct program_space *pspace, |
1222 | CORE_ADDR address) | |
08351840 | 1223 | { |
2030c079 | 1224 | for (objfile *objfile : pspace->objfiles ()) |
08351840 | 1225 | { |
d03de421 | 1226 | if ((objfile->flags & OBJF_SHARED) != 0 |
08351840 | 1227 | && is_addr_in_objfile (address, objfile)) |
02ff80c2 | 1228 | return true; |
08351840 PA |
1229 | } |
1230 | ||
02ff80c2 | 1231 | return false; |
08351840 PA |
1232 | } |
1233 | ||
19630284 | 1234 | /* The default implementation for the "iterate_over_objfiles_in_search_order" |
2030c079 | 1235 | gdbarch method. It is equivalent to use the objfiles iterable, |
19630284 JB |
1236 | searching the objfiles in the order they are stored internally, |
1237 | ignoring CURRENT_OBJFILE. | |
1238 | ||
85102364 | 1239 | On most platforms, it should be close enough to doing the best |
19630284 JB |
1240 | we can without some knowledge specific to the architecture. */ |
1241 | ||
1242 | void | |
1243 | default_iterate_over_objfiles_in_search_order | |
6e9cd73e SM |
1244 | (gdbarch *gdbarch, iterate_over_objfiles_in_search_order_cb_ftype cb, |
1245 | objfile *current_objfile) | |
19630284 | 1246 | { |
2030c079 | 1247 | for (objfile *objfile : current_program_space->objfiles ()) |
6e9cd73e SM |
1248 | if (cb (objfile)) |
1249 | return; | |
19630284 JB |
1250 | } |
1251 | ||
e02c96a7 | 1252 | /* See objfiles.h. */ |
4262abfb JK |
1253 | |
1254 | const char * | |
1255 | objfile_name (const struct objfile *objfile) | |
1256 | { | |
24ba069a | 1257 | if (objfile->obfd != NULL) |
98badbfd | 1258 | return bfd_get_filename (objfile->obfd.get ()); |
24ba069a | 1259 | |
4262abfb JK |
1260 | return objfile->original_name; |
1261 | } | |
1262 | ||
cc485e62 DE |
1263 | /* See objfiles.h. */ |
1264 | ||
e02c96a7 DE |
1265 | const char * |
1266 | objfile_filename (const struct objfile *objfile) | |
1267 | { | |
1268 | if (objfile->obfd != NULL) | |
98badbfd | 1269 | return bfd_get_filename (objfile->obfd.get ()); |
e02c96a7 DE |
1270 | |
1271 | return NULL; | |
1272 | } | |
1273 | ||
1274 | /* See objfiles.h. */ | |
1275 | ||
cc485e62 DE |
1276 | const char * |
1277 | objfile_debug_name (const struct objfile *objfile) | |
1278 | { | |
1279 | return lbasename (objfile->original_name); | |
1280 | } | |
1281 | ||
015d2e7e DE |
1282 | /* See objfiles.h. */ |
1283 | ||
1284 | const char * | |
1285 | objfile_flavour_name (struct objfile *objfile) | |
1286 | { | |
1287 | if (objfile->obfd != NULL) | |
98badbfd | 1288 | return bfd_flavour_name (bfd_get_flavour (objfile->obfd.get ())); |
015d2e7e DE |
1289 | return NULL; |
1290 | } | |
b3a01ce2 WP |
1291 | |
1292 | /* See objfiles.h. */ | |
1293 | ||
1294 | struct type * | |
1295 | objfile_int_type (struct objfile *of, int size_in_bytes, bool unsigned_p) | |
1296 | { | |
1297 | struct type *int_type; | |
1298 | ||
1299 | /* Helper macro to examine the various builtin types. */ | |
1300 | #define TRY_TYPE(F) \ | |
1301 | int_type = (unsigned_p \ | |
a8ed3dde TT |
1302 | ? builtin_type (of)->builtin_unsigned_ ## F \ |
1303 | : builtin_type (of)->builtin_ ## F); \ | |
df86565b | 1304 | if (int_type != NULL && int_type->length () == size_in_bytes) \ |
b3a01ce2 WP |
1305 | return int_type |
1306 | ||
1307 | TRY_TYPE (char); | |
1308 | TRY_TYPE (short); | |
1309 | TRY_TYPE (int); | |
1310 | TRY_TYPE (long); | |
1311 | TRY_TYPE (long_long); | |
1312 | ||
1313 | #undef TRY_TYPE | |
1314 | ||
1315 | gdb_assert_not_reached ("unable to find suitable integer type"); | |
1316 | } |