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