Commit | Line | Data |
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c906108c | 1 | /* GDB routines for manipulating objfiles. |
af5f3db6 | 2 | |
6aba47ca | 3 | Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
9b254dd1 | 4 | 2002, 2003, 2004, 2007, 2008 Free Software Foundation, Inc. |
af5f3db6 | 5 | |
c906108c SS |
6 | Contributed by Cygnus Support, using pieces from other GDB modules. |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 13 | (at your option) any later version. |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b | 20 | You should have received a copy of the GNU General Public License |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
22 | |
23 | /* This file contains support routines for creating, manipulating, and | |
24 | destroying objfile structures. */ | |
25 | ||
26 | #include "defs.h" | |
27 | #include "bfd.h" /* Binary File Description */ | |
28 | #include "symtab.h" | |
29 | #include "symfile.h" | |
30 | #include "objfiles.h" | |
31 | #include "gdb-stabs.h" | |
32 | #include "target.h" | |
af5f3db6 | 33 | #include "bcache.h" |
5b123146 | 34 | #include "mdebugread.h" |
9bdcbae7 DJ |
35 | #include "expression.h" |
36 | #include "parser-defs.h" | |
37 | ||
0d0e1a63 | 38 | #include "gdb_assert.h" |
c906108c SS |
39 | #include <sys/types.h> |
40 | #include "gdb_stat.h" | |
41 | #include <fcntl.h> | |
04ea0df1 | 42 | #include "gdb_obstack.h" |
c906108c | 43 | #include "gdb_string.h" |
2de7ced7 | 44 | #include "hashtab.h" |
c906108c | 45 | |
7a292a7a | 46 | #include "breakpoint.h" |
fe898f56 | 47 | #include "block.h" |
de4f826b | 48 | #include "dictionary.h" |
cb5d864f | 49 | #include "source.h" |
801e3a5b | 50 | #include "addrmap.h" |
5e2b427d | 51 | #include "arch-utils.h" |
30510692 | 52 | #include "exec.h" |
7a292a7a | 53 | |
c906108c SS |
54 | /* Prototypes for local functions */ |
55 | ||
0d0e1a63 MK |
56 | static void objfile_alloc_data (struct objfile *objfile); |
57 | static void objfile_free_data (struct objfile *objfile); | |
58 | ||
c906108c SS |
59 | /* Externally visible variables that are owned by this module. |
60 | See declarations in objfile.h for more info. */ | |
61 | ||
c5aa993b | 62 | struct objfile *object_files; /* Linked list of all objfiles */ |
c906108c SS |
63 | struct objfile *current_objfile; /* For symbol file being read in */ |
64 | struct objfile *symfile_objfile; /* Main symbol table loaded from */ | |
65 | struct objfile *rt_common_objfile; /* For runtime common symbols */ | |
66 | ||
c906108c SS |
67 | /* Locate all mappable sections of a BFD file. |
68 | objfile_p_char is a char * to get it through | |
69 | bfd_map_over_sections; we cast it back to its proper type. */ | |
70 | ||
96baa820 JM |
71 | /* Called via bfd_map_over_sections to build up the section table that |
72 | the objfile references. The objfile contains pointers to the start | |
73 | of the table (objfile->sections) and to the first location after | |
74 | the end of the table (objfile->sections_end). */ | |
75 | ||
c906108c | 76 | static void |
7be0c536 AC |
77 | add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
78 | void *objfile_p_char) | |
c906108c SS |
79 | { |
80 | struct objfile *objfile = (struct objfile *) objfile_p_char; | |
81 | struct obj_section section; | |
82 | flagword aflag; | |
83 | ||
84 | aflag = bfd_get_section_flags (abfd, asect); | |
85 | ||
ed7c5e43 | 86 | if (!(aflag & SEC_ALLOC)) |
c906108c SS |
87 | return; |
88 | ||
89 | if (0 == bfd_section_size (abfd, asect)) | |
90 | return; | |
91 | section.offset = 0; | |
92 | section.objfile = objfile; | |
93 | section.the_bfd_section = asect; | |
94 | section.ovly_mapped = 0; | |
95 | section.addr = bfd_section_vma (abfd, asect); | |
96 | section.endaddr = section.addr + bfd_section_size (abfd, asect); | |
8b92e4d5 | 97 | obstack_grow (&objfile->objfile_obstack, (char *) §ion, sizeof (section)); |
c906108c SS |
98 | objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1); |
99 | } | |
100 | ||
101 | /* Builds a section table for OBJFILE. | |
102 | Returns 0 if OK, 1 on error (in which case bfd_error contains the | |
96baa820 JM |
103 | error). |
104 | ||
105 | Note that while we are building the table, which goes into the | |
106 | psymbol obstack, we hijack the sections_end pointer to instead hold | |
107 | a count of the number of sections. When bfd_map_over_sections | |
108 | returns, this count is used to compute the pointer to the end of | |
109 | the sections table, which then overwrites the count. | |
110 | ||
111 | Also note that the OFFSET and OVLY_MAPPED in each table entry | |
112 | are initialized to zero. | |
113 | ||
114 | Also note that if anything else writes to the psymbol obstack while | |
115 | we are building the table, we're pretty much hosed. */ | |
c906108c SS |
116 | |
117 | int | |
fba45db2 | 118 | build_objfile_section_table (struct objfile *objfile) |
c906108c SS |
119 | { |
120 | /* objfile->sections can be already set when reading a mapped symbol | |
121 | file. I believe that we do need to rebuild the section table in | |
122 | this case (we rebuild other things derived from the bfd), but we | |
8b92e4d5 | 123 | can't free the old one (it's in the objfile_obstack). So we just |
c906108c SS |
124 | waste some memory. */ |
125 | ||
126 | objfile->sections_end = 0; | |
c5aa993b | 127 | bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *) objfile); |
c906108c | 128 | objfile->sections = (struct obj_section *) |
8b92e4d5 | 129 | obstack_finish (&objfile->objfile_obstack); |
c906108c | 130 | objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end; |
c5aa993b | 131 | return (0); |
c906108c SS |
132 | } |
133 | ||
2df3850c JM |
134 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits |
135 | allocate a new objfile struct, fill it in as best we can, link it | |
136 | into the list of all known objfiles, and return a pointer to the | |
137 | new objfile struct. | |
c906108c | 138 | |
2df3850c | 139 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
78a4a9b9 AC |
140 | requests for specific operations. Other bits like OBJF_SHARED are |
141 | simply copied through to the new objfile flags member. */ | |
c906108c | 142 | |
eb9a305d DC |
143 | /* NOTE: carlton/2003-02-04: This function is called with args NULL, 0 |
144 | by jv-lang.c, to create an artificial objfile used to hold | |
145 | information about dynamically-loaded Java classes. Unfortunately, | |
146 | that branch of this function doesn't get tested very frequently, so | |
147 | it's prone to breakage. (E.g. at one time the name was set to NULL | |
148 | in that situation, which broke a loop over all names in the dynamic | |
149 | library loader.) If you change this function, please try to leave | |
150 | things in a consistent state even if abfd is NULL. */ | |
151 | ||
c906108c | 152 | struct objfile * |
fba45db2 | 153 | allocate_objfile (bfd *abfd, int flags) |
c906108c SS |
154 | { |
155 | struct objfile *objfile = NULL; | |
156 | struct objfile *last_one = NULL; | |
157 | ||
c906108c SS |
158 | /* If we don't support mapped symbol files, didn't ask for the file to be |
159 | mapped, or failed to open the mapped file for some reason, then revert | |
160 | back to an unmapped objfile. */ | |
161 | ||
162 | if (objfile == NULL) | |
163 | { | |
164 | objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); | |
165 | memset (objfile, 0, sizeof (struct objfile)); | |
af5f3db6 AC |
166 | objfile->psymbol_cache = bcache_xmalloc (); |
167 | objfile->macro_cache = bcache_xmalloc (); | |
1ab21617 EZ |
168 | /* We could use obstack_specify_allocation here instead, but |
169 | gdb_obstack.h specifies the alloc/dealloc functions. */ | |
170 | obstack_init (&objfile->objfile_obstack); | |
15831452 | 171 | terminate_minimal_symbol_table (objfile); |
c906108c SS |
172 | } |
173 | ||
0d0e1a63 MK |
174 | objfile_alloc_data (objfile); |
175 | ||
c906108c SS |
176 | /* Update the per-objfile information that comes from the bfd, ensuring |
177 | that any data that is reference is saved in the per-objfile data | |
178 | region. */ | |
179 | ||
c5aa993b JM |
180 | objfile->obfd = abfd; |
181 | if (objfile->name != NULL) | |
c906108c | 182 | { |
2dc74dc1 | 183 | xfree (objfile->name); |
c906108c SS |
184 | } |
185 | if (abfd != NULL) | |
186 | { | |
5e2b427d UW |
187 | /* Look up the gdbarch associated with the BFD. */ |
188 | objfile->gdbarch = gdbarch_from_bfd (abfd); | |
189 | ||
982526a1 | 190 | objfile->name = xstrdup (bfd_get_filename (abfd)); |
c5aa993b | 191 | objfile->mtime = bfd_get_mtime (abfd); |
c906108c SS |
192 | |
193 | /* Build section table. */ | |
194 | ||
195 | if (build_objfile_section_table (objfile)) | |
196 | { | |
8a3fe4f8 | 197 | error (_("Can't find the file sections in `%s': %s"), |
c5aa993b | 198 | objfile->name, bfd_errmsg (bfd_get_error ())); |
c906108c SS |
199 | } |
200 | } | |
eb9a305d DC |
201 | else |
202 | { | |
982526a1 | 203 | objfile->name = xstrdup ("<<anonymous objfile>>"); |
eb9a305d | 204 | } |
c906108c | 205 | |
b8fbeb18 EZ |
206 | /* Initialize the section indexes for this objfile, so that we can |
207 | later detect if they are used w/o being properly assigned to. */ | |
208 | ||
5c4e30ca DC |
209 | objfile->sect_index_text = -1; |
210 | objfile->sect_index_data = -1; | |
211 | objfile->sect_index_bss = -1; | |
212 | objfile->sect_index_rodata = -1; | |
213 | ||
214 | /* We don't yet have a C++-specific namespace symtab. */ | |
215 | ||
216 | objfile->cp_namespace_symtab = NULL; | |
b8fbeb18 | 217 | |
c906108c SS |
218 | /* Add this file onto the tail of the linked list of other such files. */ |
219 | ||
c5aa993b | 220 | objfile->next = NULL; |
c906108c SS |
221 | if (object_files == NULL) |
222 | object_files = objfile; | |
223 | else | |
224 | { | |
225 | for (last_one = object_files; | |
c5aa993b JM |
226 | last_one->next; |
227 | last_one = last_one->next); | |
228 | last_one->next = objfile; | |
c906108c SS |
229 | } |
230 | ||
2df3850c JM |
231 | /* Save passed in flag bits. */ |
232 | objfile->flags |= flags; | |
c906108c SS |
233 | |
234 | return (objfile); | |
235 | } | |
236 | ||
5e2b427d UW |
237 | /* Retrieve the gdbarch associated with OBJFILE. */ |
238 | struct gdbarch * | |
239 | get_objfile_arch (struct objfile *objfile) | |
240 | { | |
241 | return objfile->gdbarch; | |
242 | } | |
243 | ||
9ab9195f EZ |
244 | /* Initialize entry point information for this objfile. */ |
245 | ||
246 | void | |
247 | init_entry_point_info (struct objfile *objfile) | |
248 | { | |
249 | /* Save startup file's range of PC addresses to help blockframe.c | |
250 | decide where the bottom of the stack is. */ | |
251 | ||
252 | if (bfd_get_file_flags (objfile->obfd) & EXEC_P) | |
253 | { | |
254 | /* Executable file -- record its entry point so we'll recognize | |
255 | the startup file because it contains the entry point. */ | |
256 | objfile->ei.entry_point = bfd_get_start_address (objfile->obfd); | |
257 | } | |
574dffa2 DJ |
258 | else if (bfd_get_file_flags (objfile->obfd) & DYNAMIC |
259 | && bfd_get_start_address (objfile->obfd) != 0) | |
260 | /* Some shared libraries may have entry points set and be | |
261 | runnable. There's no clear way to indicate this, so just check | |
262 | for values other than zero. */ | |
263 | objfile->ei.entry_point = bfd_get_start_address (objfile->obfd); | |
9ab9195f EZ |
264 | else |
265 | { | |
266 | /* Examination of non-executable.o files. Short-circuit this stuff. */ | |
267 | objfile->ei.entry_point = INVALID_ENTRY_POINT; | |
268 | } | |
9ab9195f EZ |
269 | } |
270 | ||
271 | /* Get current entry point address. */ | |
272 | ||
273 | CORE_ADDR | |
274 | entry_point_address (void) | |
275 | { | |
276 | return symfile_objfile ? symfile_objfile->ei.entry_point : 0; | |
277 | } | |
15831452 JB |
278 | |
279 | /* Create the terminating entry of OBJFILE's minimal symbol table. | |
280 | If OBJFILE->msymbols is zero, allocate a single entry from | |
4a146b47 | 281 | OBJFILE->objfile_obstack; otherwise, just initialize |
15831452 JB |
282 | OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */ |
283 | void | |
284 | terminate_minimal_symbol_table (struct objfile *objfile) | |
285 | { | |
286 | if (! objfile->msymbols) | |
287 | objfile->msymbols = ((struct minimal_symbol *) | |
4a146b47 | 288 | obstack_alloc (&objfile->objfile_obstack, |
15831452 JB |
289 | sizeof (objfile->msymbols[0]))); |
290 | ||
291 | { | |
292 | struct minimal_symbol *m | |
293 | = &objfile->msymbols[objfile->minimal_symbol_count]; | |
294 | ||
295 | memset (m, 0, sizeof (*m)); | |
5bf0017e EZ |
296 | /* Don't rely on these enumeration values being 0's. */ |
297 | MSYMBOL_TYPE (m) = mst_unknown; | |
15831452 JB |
298 | SYMBOL_INIT_LANGUAGE_SPECIFIC (m, language_unknown); |
299 | } | |
300 | } | |
301 | ||
302 | ||
5b5d99cf JB |
303 | /* Put one object file before a specified on in the global list. |
304 | This can be used to make sure an object file is destroyed before | |
305 | another when using ALL_OBJFILES_SAFE to free all objfiles. */ | |
306 | void | |
307 | put_objfile_before (struct objfile *objfile, struct objfile *before_this) | |
308 | { | |
309 | struct objfile **objp; | |
310 | ||
311 | unlink_objfile (objfile); | |
312 | ||
313 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
314 | { | |
315 | if (*objp == before_this) | |
316 | { | |
317 | objfile->next = *objp; | |
318 | *objp = objfile; | |
319 | return; | |
320 | } | |
321 | } | |
322 | ||
323 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 324 | _("put_objfile_before: before objfile not in list")); |
5b5d99cf JB |
325 | } |
326 | ||
c906108c SS |
327 | /* Put OBJFILE at the front of the list. */ |
328 | ||
329 | void | |
fba45db2 | 330 | objfile_to_front (struct objfile *objfile) |
c906108c SS |
331 | { |
332 | struct objfile **objp; | |
333 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
334 | { | |
335 | if (*objp == objfile) | |
336 | { | |
337 | /* Unhook it from where it is. */ | |
338 | *objp = objfile->next; | |
339 | /* Put it in the front. */ | |
340 | objfile->next = object_files; | |
341 | object_files = objfile; | |
342 | break; | |
343 | } | |
344 | } | |
345 | } | |
346 | ||
347 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the | |
348 | list. | |
349 | ||
350 | It is not a bug, or error, to call this function if OBJFILE is not known | |
351 | to be in the current list. This is done in the case of mapped objfiles, | |
352 | for example, just to ensure that the mapped objfile doesn't appear twice | |
353 | in the list. Since the list is threaded, linking in a mapped objfile | |
354 | twice would create a circular list. | |
355 | ||
356 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
357 | unlinking it, just to ensure that we have completely severed any linkages | |
358 | between the OBJFILE and the list. */ | |
359 | ||
360 | void | |
fba45db2 | 361 | unlink_objfile (struct objfile *objfile) |
c906108c | 362 | { |
c5aa993b | 363 | struct objfile **objpp; |
c906108c | 364 | |
c5aa993b | 365 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
c906108c | 366 | { |
c5aa993b | 367 | if (*objpp == objfile) |
c906108c | 368 | { |
c5aa993b JM |
369 | *objpp = (*objpp)->next; |
370 | objfile->next = NULL; | |
07cd4b97 | 371 | return; |
c906108c SS |
372 | } |
373 | } | |
07cd4b97 | 374 | |
8e65ff28 | 375 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 376 | _("unlink_objfile: objfile already unlinked")); |
c906108c SS |
377 | } |
378 | ||
379 | ||
380 | /* Destroy an objfile and all the symtabs and psymtabs under it. Note | |
4a146b47 EZ |
381 | that as much as possible is allocated on the objfile_obstack |
382 | so that the memory can be efficiently freed. | |
c906108c SS |
383 | |
384 | Things which we do NOT free because they are not in malloc'd memory | |
385 | or not in memory specific to the objfile include: | |
386 | ||
c5aa993b | 387 | objfile -> sf |
c906108c SS |
388 | |
389 | FIXME: If the objfile is using reusable symbol information (via mmalloc), | |
390 | then we need to take into account the fact that more than one process | |
391 | may be using the symbol information at the same time (when mmalloc is | |
392 | extended to support cooperative locking). When more than one process | |
393 | is using the mapped symbol info, we need to be more careful about when | |
394 | we free objects in the reusable area. */ | |
395 | ||
396 | void | |
fba45db2 | 397 | free_objfile (struct objfile *objfile) |
c906108c | 398 | { |
5b5d99cf JB |
399 | if (objfile->separate_debug_objfile) |
400 | { | |
401 | free_objfile (objfile->separate_debug_objfile); | |
402 | } | |
403 | ||
404 | if (objfile->separate_debug_objfile_backlink) | |
405 | { | |
406 | /* We freed the separate debug file, make sure the base objfile | |
407 | doesn't reference it. */ | |
408 | objfile->separate_debug_objfile_backlink->separate_debug_objfile = NULL; | |
409 | } | |
410 | ||
ae5a43e0 DJ |
411 | /* Remove any references to this objfile in the global value |
412 | lists. */ | |
413 | preserve_values (objfile); | |
414 | ||
c906108c SS |
415 | /* First do any symbol file specific actions required when we are |
416 | finished with a particular symbol file. Note that if the objfile | |
417 | is using reusable symbol information (via mmalloc) then each of | |
418 | these routines is responsible for doing the correct thing, either | |
419 | freeing things which are valid only during this particular gdb | |
420 | execution, or leaving them to be reused during the next one. */ | |
421 | ||
c5aa993b | 422 | if (objfile->sf != NULL) |
c906108c | 423 | { |
c5aa993b | 424 | (*objfile->sf->sym_finish) (objfile); |
c906108c SS |
425 | } |
426 | ||
427 | /* We always close the bfd. */ | |
428 | ||
c5aa993b | 429 | if (objfile->obfd != NULL) |
c906108c SS |
430 | { |
431 | char *name = bfd_get_filename (objfile->obfd); | |
c5aa993b | 432 | if (!bfd_close (objfile->obfd)) |
8a3fe4f8 | 433 | warning (_("cannot close \"%s\": %s"), |
c906108c | 434 | name, bfd_errmsg (bfd_get_error ())); |
b8c9b27d | 435 | xfree (name); |
c906108c SS |
436 | } |
437 | ||
438 | /* Remove it from the chain of all objfiles. */ | |
439 | ||
440 | unlink_objfile (objfile); | |
441 | ||
442 | /* If we are going to free the runtime common objfile, mark it | |
443 | as unallocated. */ | |
444 | ||
445 | if (objfile == rt_common_objfile) | |
446 | rt_common_objfile = NULL; | |
447 | ||
448 | /* Before the symbol table code was redone to make it easier to | |
449 | selectively load and remove information particular to a specific | |
450 | linkage unit, gdb used to do these things whenever the monolithic | |
451 | symbol table was blown away. How much still needs to be done | |
452 | is unknown, but we play it safe for now and keep each action until | |
453 | it is shown to be no longer needed. */ | |
c5aa993b | 454 | |
cb5d864f FF |
455 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
456 | for example), so we need to call this here. */ | |
c906108c SS |
457 | clear_pc_function_cache (); |
458 | ||
9bdcbae7 DJ |
459 | /* Clear globals which might have pointed into a removed objfile. |
460 | FIXME: It's not clear which of these are supposed to persist | |
461 | between expressions and which ought to be reset each time. */ | |
462 | expression_context_block = NULL; | |
463 | innermost_block = NULL; | |
464 | ||
cb5d864f FF |
465 | /* Check to see if the current_source_symtab belongs to this objfile, |
466 | and if so, call clear_current_source_symtab_and_line. */ | |
467 | ||
468 | { | |
469 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
470 | struct symtab *s; | |
471 | ||
472 | ALL_OBJFILE_SYMTABS (objfile, s) | |
473 | { | |
474 | if (s == cursal.symtab) | |
475 | clear_current_source_symtab_and_line (); | |
476 | } | |
477 | } | |
478 | ||
78a4a9b9 | 479 | /* The last thing we do is free the objfile struct itself. */ |
c906108c | 480 | |
78a4a9b9 AC |
481 | objfile_free_data (objfile); |
482 | if (objfile->name != NULL) | |
c906108c | 483 | { |
2dc74dc1 | 484 | xfree (objfile->name); |
c906108c | 485 | } |
78a4a9b9 | 486 | if (objfile->global_psymbols.list) |
2dc74dc1 | 487 | xfree (objfile->global_psymbols.list); |
78a4a9b9 | 488 | if (objfile->static_psymbols.list) |
2dc74dc1 | 489 | xfree (objfile->static_psymbols.list); |
78a4a9b9 AC |
490 | /* Free the obstacks for non-reusable objfiles */ |
491 | bcache_xfree (objfile->psymbol_cache); | |
492 | bcache_xfree (objfile->macro_cache); | |
493 | if (objfile->demangled_names_hash) | |
494 | htab_delete (objfile->demangled_names_hash); | |
b99607ea | 495 | obstack_free (&objfile->objfile_obstack, 0); |
2dc74dc1 | 496 | xfree (objfile); |
78a4a9b9 | 497 | objfile = NULL; |
c906108c SS |
498 | } |
499 | ||
74b7792f AC |
500 | static void |
501 | do_free_objfile_cleanup (void *obj) | |
502 | { | |
503 | free_objfile (obj); | |
504 | } | |
505 | ||
506 | struct cleanup * | |
507 | make_cleanup_free_objfile (struct objfile *obj) | |
508 | { | |
509 | return make_cleanup (do_free_objfile_cleanup, obj); | |
510 | } | |
c906108c SS |
511 | |
512 | /* Free all the object files at once and clean up their users. */ | |
513 | ||
514 | void | |
fba45db2 | 515 | free_all_objfiles (void) |
c906108c SS |
516 | { |
517 | struct objfile *objfile, *temp; | |
518 | ||
519 | ALL_OBJFILES_SAFE (objfile, temp) | |
c5aa993b JM |
520 | { |
521 | free_objfile (objfile); | |
522 | } | |
c906108c SS |
523 | clear_symtab_users (); |
524 | } | |
525 | \f | |
526 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
527 | entries in new_offsets. */ | |
528 | void | |
fba45db2 | 529 | objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets) |
c906108c | 530 | { |
30510692 | 531 | struct obj_section *s; |
d4f3574e | 532 | struct section_offsets *delta = |
a39a16c4 MM |
533 | ((struct section_offsets *) |
534 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
c906108c SS |
535 | |
536 | { | |
537 | int i; | |
538 | int something_changed = 0; | |
539 | for (i = 0; i < objfile->num_sections; ++i) | |
540 | { | |
a4c8257b | 541 | delta->offsets[i] = |
c906108c SS |
542 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); |
543 | if (ANOFFSET (delta, i) != 0) | |
544 | something_changed = 1; | |
545 | } | |
546 | if (!something_changed) | |
547 | return; | |
548 | } | |
549 | ||
550 | /* OK, get all the symtabs. */ | |
551 | { | |
552 | struct symtab *s; | |
553 | ||
554 | ALL_OBJFILE_SYMTABS (objfile, s) | |
c5aa993b JM |
555 | { |
556 | struct linetable *l; | |
557 | struct blockvector *bv; | |
558 | int i; | |
559 | ||
560 | /* First the line table. */ | |
561 | l = LINETABLE (s); | |
562 | if (l) | |
563 | { | |
564 | for (i = 0; i < l->nitems; ++i) | |
565 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
566 | } | |
c906108c | 567 | |
c5aa993b JM |
568 | /* Don't relocate a shared blockvector more than once. */ |
569 | if (!s->primary) | |
570 | continue; | |
c906108c | 571 | |
c5aa993b JM |
572 | bv = BLOCKVECTOR (s); |
573 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) | |
574 | { | |
575 | struct block *b; | |
e88c90f2 | 576 | struct symbol *sym; |
de4f826b | 577 | struct dict_iterator iter; |
c5aa993b JM |
578 | |
579 | b = BLOCKVECTOR_BLOCK (bv, i); | |
580 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
581 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
801e3a5b JB |
582 | if (BLOCKVECTOR_MAP (bv)) |
583 | addrmap_relocate (BLOCKVECTOR_MAP (bv), | |
584 | ANOFFSET (delta, s->block_line_section)); | |
c5aa993b | 585 | |
de4f826b | 586 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
c5aa993b | 587 | { |
7a78d0ee KB |
588 | fixup_symbol_section (sym, objfile); |
589 | ||
c5aa993b | 590 | /* The RS6000 code from which this was taken skipped |
176620f1 | 591 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. |
c5aa993b JM |
592 | But I'm leaving out that test, on the theory that |
593 | they can't possibly pass the tests below. */ | |
594 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
0bb4e8c4 | 595 | || SYMBOL_CLASS (sym) == LOC_STATIC) |
c5aa993b JM |
596 | && SYMBOL_SECTION (sym) >= 0) |
597 | { | |
598 | SYMBOL_VALUE_ADDRESS (sym) += | |
599 | ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
600 | } | |
c5aa993b JM |
601 | } |
602 | } | |
603 | } | |
c906108c SS |
604 | } |
605 | ||
606 | { | |
607 | struct partial_symtab *p; | |
608 | ||
609 | ALL_OBJFILE_PSYMTABS (objfile, p) | |
c5aa993b | 610 | { |
b8fbeb18 EZ |
611 | p->textlow += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
612 | p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
c5aa993b | 613 | } |
c906108c SS |
614 | } |
615 | ||
616 | { | |
617 | struct partial_symbol **psym; | |
618 | ||
619 | for (psym = objfile->global_psymbols.list; | |
620 | psym < objfile->global_psymbols.next; | |
621 | psym++) | |
7a78d0ee KB |
622 | { |
623 | fixup_psymbol_section (*psym, objfile); | |
624 | if (SYMBOL_SECTION (*psym) >= 0) | |
625 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, | |
626 | SYMBOL_SECTION (*psym)); | |
627 | } | |
c906108c SS |
628 | for (psym = objfile->static_psymbols.list; |
629 | psym < objfile->static_psymbols.next; | |
630 | psym++) | |
7a78d0ee KB |
631 | { |
632 | fixup_psymbol_section (*psym, objfile); | |
633 | if (SYMBOL_SECTION (*psym) >= 0) | |
634 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, | |
635 | SYMBOL_SECTION (*psym)); | |
636 | } | |
c906108c SS |
637 | } |
638 | ||
639 | { | |
640 | struct minimal_symbol *msym; | |
641 | ALL_OBJFILE_MSYMBOLS (objfile, msym) | |
642 | if (SYMBOL_SECTION (msym) >= 0) | |
c5aa993b | 643 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); |
c906108c SS |
644 | } |
645 | /* Relocating different sections by different amounts may cause the symbols | |
646 | to be out of order. */ | |
647 | msymbols_sort (objfile); | |
648 | ||
649 | { | |
650 | int i; | |
651 | for (i = 0; i < objfile->num_sections; ++i) | |
a4c8257b | 652 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); |
c906108c SS |
653 | } |
654 | ||
36b0c0e0 PS |
655 | if (objfile->ei.entry_point != ~(CORE_ADDR) 0) |
656 | { | |
657 | /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT | |
658 | only as a fallback. */ | |
659 | struct obj_section *s; | |
660 | s = find_pc_section (objfile->ei.entry_point); | |
661 | if (s) | |
662 | objfile->ei.entry_point += ANOFFSET (delta, s->the_bfd_section->index); | |
663 | else | |
664 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
665 | } | |
666 | ||
c906108c SS |
667 | { |
668 | struct obj_section *s; | |
669 | bfd *abfd; | |
670 | ||
671 | abfd = objfile->obfd; | |
672 | ||
96baa820 | 673 | ALL_OBJFILE_OSECTIONS (objfile, s) |
c906108c | 674 | { |
78f0949b KB |
675 | int idx = s->the_bfd_section->index; |
676 | ||
677 | s->addr += ANOFFSET (delta, idx); | |
678 | s->endaddr += ANOFFSET (delta, idx); | |
c906108c SS |
679 | } |
680 | } | |
681 | ||
30510692 DJ |
682 | /* Update the table in exec_ops, used to read memory. */ |
683 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
684 | { | |
685 | int idx = s->the_bfd_section->index; | |
686 | ||
687 | exec_set_section_address (bfd_get_filename (objfile->obfd), idx, | |
688 | s->addr); | |
689 | } | |
690 | ||
c906108c SS |
691 | /* Relocate breakpoints as necessary, after things are relocated. */ |
692 | breakpoint_re_set (); | |
693 | } | |
694 | \f | |
695 | /* Many places in gdb want to test just to see if we have any partial | |
696 | symbols available. This function returns zero if none are currently | |
697 | available, nonzero otherwise. */ | |
698 | ||
699 | int | |
fba45db2 | 700 | have_partial_symbols (void) |
c906108c SS |
701 | { |
702 | struct objfile *ofp; | |
703 | ||
704 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
705 | { |
706 | if (ofp->psymtabs != NULL) | |
707 | { | |
708 | return 1; | |
709 | } | |
710 | } | |
c906108c SS |
711 | return 0; |
712 | } | |
713 | ||
714 | /* Many places in gdb want to test just to see if we have any full | |
715 | symbols available. This function returns zero if none are currently | |
716 | available, nonzero otherwise. */ | |
717 | ||
718 | int | |
fba45db2 | 719 | have_full_symbols (void) |
c906108c SS |
720 | { |
721 | struct objfile *ofp; | |
722 | ||
723 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
724 | { |
725 | if (ofp->symtabs != NULL) | |
726 | { | |
727 | return 1; | |
728 | } | |
729 | } | |
c906108c SS |
730 | return 0; |
731 | } | |
732 | ||
733 | ||
734 | /* This operations deletes all objfile entries that represent solibs that | |
735 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
736 | command. | |
c5aa993b | 737 | */ |
c906108c | 738 | void |
fba45db2 | 739 | objfile_purge_solibs (void) |
c906108c | 740 | { |
c5aa993b JM |
741 | struct objfile *objf; |
742 | struct objfile *temp; | |
c906108c SS |
743 | |
744 | ALL_OBJFILES_SAFE (objf, temp) | |
745 | { | |
746 | /* We assume that the solib package has been purged already, or will | |
747 | be soon. | |
c5aa993b | 748 | */ |
2df3850c | 749 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
c906108c SS |
750 | free_objfile (objf); |
751 | } | |
752 | } | |
753 | ||
754 | ||
755 | /* Many places in gdb want to test just to see if we have any minimal | |
756 | symbols available. This function returns zero if none are currently | |
757 | available, nonzero otherwise. */ | |
758 | ||
759 | int | |
fba45db2 | 760 | have_minimal_symbols (void) |
c906108c SS |
761 | { |
762 | struct objfile *ofp; | |
763 | ||
764 | ALL_OBJFILES (ofp) | |
c5aa993b | 765 | { |
15831452 | 766 | if (ofp->minimal_symbol_count > 0) |
c5aa993b JM |
767 | { |
768 | return 1; | |
769 | } | |
770 | } | |
c906108c SS |
771 | return 0; |
772 | } | |
773 | ||
198beae2 AC |
774 | /* Returns a section whose range includes PC and SECTION, or NULL if |
775 | none found. Note the distinction between the return type, struct | |
776 | obj_section (which is defined in gdb), and the input type "struct | |
777 | bfd_section" (which is a bfd-defined data type). The obj_section | |
778 | contains a pointer to the "struct bfd_section". */ | |
c906108c SS |
779 | |
780 | struct obj_section * | |
198beae2 | 781 | find_pc_sect_section (CORE_ADDR pc, struct bfd_section *section) |
c906108c SS |
782 | { |
783 | struct obj_section *s; | |
784 | struct objfile *objfile; | |
c5aa993b | 785 | |
96baa820 | 786 | ALL_OBJSECTIONS (objfile, s) |
c5aa993b JM |
787 | if ((section == 0 || section == s->the_bfd_section) && |
788 | s->addr <= pc && pc < s->endaddr) | |
c5aa993b | 789 | return (s); |
c906108c | 790 | |
c5aa993b | 791 | return (NULL); |
c906108c SS |
792 | } |
793 | ||
794 | /* Returns a section whose range includes PC or NULL if none found. | |
795 | Backward compatibility, no section. */ | |
796 | ||
797 | struct obj_section * | |
fba45db2 | 798 | find_pc_section (CORE_ADDR pc) |
c906108c SS |
799 | { |
800 | return find_pc_sect_section (pc, find_pc_mapped_section (pc)); | |
801 | } | |
c5aa993b | 802 | |
c906108c SS |
803 | |
804 | /* In SVR4, we recognize a trampoline by it's section name. | |
805 | That is, if the pc is in a section named ".plt" then we are in | |
806 | a trampoline. */ | |
807 | ||
808 | int | |
fba45db2 | 809 | in_plt_section (CORE_ADDR pc, char *name) |
c906108c SS |
810 | { |
811 | struct obj_section *s; | |
812 | int retval = 0; | |
c5aa993b JM |
813 | |
814 | s = find_pc_section (pc); | |
815 | ||
c906108c SS |
816 | retval = (s != NULL |
817 | && s->the_bfd_section->name != NULL | |
6314a349 | 818 | && strcmp (s->the_bfd_section->name, ".plt") == 0); |
c5aa993b | 819 | return (retval); |
c906108c | 820 | } |
0d0e1a63 MK |
821 | \f |
822 | ||
823 | /* Keep a registry of per-objfile data-pointers required by other GDB | |
824 | modules. */ | |
825 | ||
826 | struct objfile_data | |
827 | { | |
828 | unsigned index; | |
60c5725c | 829 | void (*cleanup) (struct objfile *, void *); |
0d0e1a63 MK |
830 | }; |
831 | ||
832 | struct objfile_data_registration | |
833 | { | |
834 | struct objfile_data *data; | |
835 | struct objfile_data_registration *next; | |
836 | }; | |
837 | ||
838 | struct objfile_data_registry | |
839 | { | |
840 | struct objfile_data_registration *registrations; | |
841 | unsigned num_registrations; | |
842 | }; | |
843 | ||
844 | static struct objfile_data_registry objfile_data_registry = { NULL, 0 }; | |
845 | ||
846 | const struct objfile_data * | |
60c5725c | 847 | register_objfile_data_with_cleanup (void (*cleanup) (struct objfile *, void *)) |
0d0e1a63 MK |
848 | { |
849 | struct objfile_data_registration **curr; | |
850 | ||
851 | /* Append new registration. */ | |
852 | for (curr = &objfile_data_registry.registrations; | |
853 | *curr != NULL; curr = &(*curr)->next); | |
7be570e7 | 854 | |
0d0e1a63 MK |
855 | *curr = XMALLOC (struct objfile_data_registration); |
856 | (*curr)->next = NULL; | |
857 | (*curr)->data = XMALLOC (struct objfile_data); | |
858 | (*curr)->data->index = objfile_data_registry.num_registrations++; | |
60c5725c | 859 | (*curr)->data->cleanup = cleanup; |
0d0e1a63 MK |
860 | |
861 | return (*curr)->data; | |
862 | } | |
863 | ||
60c5725c DJ |
864 | const struct objfile_data * |
865 | register_objfile_data (void) | |
866 | { | |
867 | return register_objfile_data_with_cleanup (NULL); | |
868 | } | |
869 | ||
0d0e1a63 MK |
870 | static void |
871 | objfile_alloc_data (struct objfile *objfile) | |
872 | { | |
873 | gdb_assert (objfile->data == NULL); | |
874 | objfile->num_data = objfile_data_registry.num_registrations; | |
875 | objfile->data = XCALLOC (objfile->num_data, void *); | |
876 | } | |
877 | ||
878 | static void | |
879 | objfile_free_data (struct objfile *objfile) | |
880 | { | |
881 | gdb_assert (objfile->data != NULL); | |
60c5725c | 882 | clear_objfile_data (objfile); |
0d0e1a63 MK |
883 | xfree (objfile->data); |
884 | objfile->data = NULL; | |
885 | } | |
886 | ||
7b097ae3 MK |
887 | void |
888 | clear_objfile_data (struct objfile *objfile) | |
889 | { | |
60c5725c DJ |
890 | struct objfile_data_registration *registration; |
891 | int i; | |
892 | ||
7b097ae3 | 893 | gdb_assert (objfile->data != NULL); |
60c5725c DJ |
894 | |
895 | for (registration = objfile_data_registry.registrations, i = 0; | |
896 | i < objfile->num_data; | |
897 | registration = registration->next, i++) | |
898 | if (objfile->data[i] != NULL && registration->data->cleanup) | |
899 | registration->data->cleanup (objfile, objfile->data[i]); | |
900 | ||
7b097ae3 MK |
901 | memset (objfile->data, 0, objfile->num_data * sizeof (void *)); |
902 | } | |
903 | ||
0d0e1a63 MK |
904 | void |
905 | set_objfile_data (struct objfile *objfile, const struct objfile_data *data, | |
906 | void *value) | |
907 | { | |
908 | gdb_assert (data->index < objfile->num_data); | |
909 | objfile->data[data->index] = value; | |
910 | } | |
911 | ||
912 | void * | |
913 | objfile_data (struct objfile *objfile, const struct objfile_data *data) | |
914 | { | |
915 | gdb_assert (data->index < objfile->num_data); | |
916 | return objfile->data[data->index]; | |
917 | } |