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c906108c SS |
1 | /* GDB routines for manipulating objfiles. |
2 | Copyright 1992, 1993, 1994, 1995 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support, using pieces from other GDB modules. | |
4 | ||
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
21 | |
22 | /* This file contains support routines for creating, manipulating, and | |
23 | destroying objfile structures. */ | |
24 | ||
25 | #include "defs.h" | |
26 | #include "bfd.h" /* Binary File Description */ | |
27 | #include "symtab.h" | |
28 | #include "symfile.h" | |
29 | #include "objfiles.h" | |
30 | #include "gdb-stabs.h" | |
31 | #include "target.h" | |
32 | ||
33 | #include <sys/types.h> | |
34 | #include "gdb_stat.h" | |
35 | #include <fcntl.h> | |
36 | #include "obstack.h" | |
37 | #include "gdb_string.h" | |
38 | ||
7a292a7a SS |
39 | #include "breakpoint.h" |
40 | ||
c906108c SS |
41 | /* Prototypes for local functions */ |
42 | ||
43 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
44 | ||
45 | static int | |
46 | open_existing_mapped_file PARAMS ((char *, long, int)); | |
47 | ||
48 | static int | |
2df3850c | 49 | open_mapped_file PARAMS ((char *filename, long mtime, int flags)); |
c906108c SS |
50 | |
51 | static PTR | |
c5aa993b | 52 | map_to_file PARAMS ((int)); |
c906108c | 53 | |
c5aa993b | 54 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c SS |
55 | |
56 | static void | |
57 | add_to_objfile_sections PARAMS ((bfd *, sec_ptr, PTR)); | |
58 | ||
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 | ||
c5aa993b | 67 | int mapped_symbol_files; /* Try to use mapped symbol files */ |
c906108c SS |
68 | |
69 | /* Locate all mappable sections of a BFD file. | |
70 | objfile_p_char is a char * to get it through | |
71 | bfd_map_over_sections; we cast it back to its proper type. */ | |
72 | ||
73 | #ifndef TARGET_KEEP_SECTION | |
74 | #define TARGET_KEEP_SECTION(ASECT) 0 | |
75 | #endif | |
76 | ||
96baa820 JM |
77 | /* Called via bfd_map_over_sections to build up the section table that |
78 | the objfile references. The objfile contains pointers to the start | |
79 | of the table (objfile->sections) and to the first location after | |
80 | the end of the table (objfile->sections_end). */ | |
81 | ||
c906108c SS |
82 | static void |
83 | add_to_objfile_sections (abfd, asect, objfile_p_char) | |
84 | bfd *abfd; | |
85 | sec_ptr asect; | |
86 | PTR objfile_p_char; | |
87 | { | |
88 | struct objfile *objfile = (struct objfile *) objfile_p_char; | |
89 | struct obj_section section; | |
90 | flagword aflag; | |
91 | ||
92 | aflag = bfd_get_section_flags (abfd, asect); | |
93 | ||
c5aa993b | 94 | if (!(aflag & SEC_ALLOC) && !(TARGET_KEEP_SECTION (asect))) |
c906108c SS |
95 | return; |
96 | ||
97 | if (0 == bfd_section_size (abfd, asect)) | |
98 | return; | |
99 | section.offset = 0; | |
100 | section.objfile = objfile; | |
101 | section.the_bfd_section = asect; | |
102 | section.ovly_mapped = 0; | |
103 | section.addr = bfd_section_vma (abfd, asect); | |
104 | section.endaddr = section.addr + bfd_section_size (abfd, asect); | |
c5aa993b | 105 | obstack_grow (&objfile->psymbol_obstack, (char *) §ion, sizeof (section)); |
c906108c SS |
106 | objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1); |
107 | } | |
108 | ||
109 | /* Builds a section table for OBJFILE. | |
110 | Returns 0 if OK, 1 on error (in which case bfd_error contains the | |
96baa820 JM |
111 | error). |
112 | ||
113 | Note that while we are building the table, which goes into the | |
114 | psymbol obstack, we hijack the sections_end pointer to instead hold | |
115 | a count of the number of sections. When bfd_map_over_sections | |
116 | returns, this count is used to compute the pointer to the end of | |
117 | the sections table, which then overwrites the count. | |
118 | ||
119 | Also note that the OFFSET and OVLY_MAPPED in each table entry | |
120 | are initialized to zero. | |
121 | ||
122 | Also note that if anything else writes to the psymbol obstack while | |
123 | we are building the table, we're pretty much hosed. */ | |
c906108c SS |
124 | |
125 | int | |
126 | build_objfile_section_table (objfile) | |
127 | struct objfile *objfile; | |
128 | { | |
129 | /* objfile->sections can be already set when reading a mapped symbol | |
130 | file. I believe that we do need to rebuild the section table in | |
131 | this case (we rebuild other things derived from the bfd), but we | |
132 | can't free the old one (it's in the psymbol_obstack). So we just | |
133 | waste some memory. */ | |
134 | ||
135 | objfile->sections_end = 0; | |
c5aa993b | 136 | bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *) objfile); |
c906108c SS |
137 | objfile->sections = (struct obj_section *) |
138 | obstack_finish (&objfile->psymbol_obstack); | |
139 | objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end; | |
c5aa993b | 140 | return (0); |
c906108c SS |
141 | } |
142 | ||
2df3850c JM |
143 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits |
144 | allocate a new objfile struct, fill it in as best we can, link it | |
145 | into the list of all known objfiles, and return a pointer to the | |
146 | new objfile struct. | |
c906108c | 147 | |
2df3850c JM |
148 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
149 | requests for specific operations, like trying to open a mapped | |
150 | version of the objfile (OBJF_MAPPED). Other bits like | |
151 | OBJF_SHARED are simply copied through to the new objfile flags | |
152 | member. */ | |
c906108c SS |
153 | |
154 | struct objfile * | |
2df3850c | 155 | allocate_objfile (abfd, flags) |
c906108c | 156 | bfd *abfd; |
2df3850c | 157 | int flags; |
c906108c SS |
158 | { |
159 | struct objfile *objfile = NULL; | |
160 | struct objfile *last_one = NULL; | |
161 | ||
2df3850c JM |
162 | if (mapped_symbol_files) |
163 | flags |= OBJF_MAPPED; | |
c906108c SS |
164 | |
165 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
166 | if (abfd != NULL) | |
c5aa993b | 167 | { |
c906108c | 168 | |
c5aa993b JM |
169 | /* If we can support mapped symbol files, try to open/reopen the |
170 | mapped file that corresponds to the file from which we wish to | |
171 | read symbols. If the objfile is to be mapped, we must malloc | |
172 | the structure itself using the mmap version, and arrange that | |
173 | all memory allocation for the objfile uses the mmap routines. | |
174 | If we are reusing an existing mapped file, from which we get | |
175 | our objfile pointer, we have to make sure that we update the | |
176 | pointers to the alloc/free functions in the obstack, in case | |
177 | these functions have moved within the current gdb. */ | |
178 | ||
179 | int fd; | |
180 | ||
181 | fd = open_mapped_file (bfd_get_filename (abfd), bfd_get_mtime (abfd), | |
2df3850c | 182 | flags); |
c5aa993b JM |
183 | if (fd >= 0) |
184 | { | |
185 | PTR md; | |
c906108c | 186 | |
c5aa993b JM |
187 | if ((md = map_to_file (fd)) == NULL) |
188 | { | |
189 | close (fd); | |
190 | } | |
191 | else if ((objfile = (struct objfile *) mmalloc_getkey (md, 0)) != NULL) | |
192 | { | |
193 | /* Update memory corruption handler function addresses. */ | |
194 | init_malloc (md); | |
195 | objfile->md = md; | |
196 | objfile->mmfd = fd; | |
197 | /* Update pointers to functions to *our* copies */ | |
198 | obstack_chunkfun (&objfile->psymbol_cache.cache, xmmalloc); | |
199 | obstack_freefun (&objfile->psymbol_cache.cache, mfree); | |
200 | obstack_chunkfun (&objfile->psymbol_obstack, xmmalloc); | |
201 | obstack_freefun (&objfile->psymbol_obstack, mfree); | |
202 | obstack_chunkfun (&objfile->symbol_obstack, xmmalloc); | |
203 | obstack_freefun (&objfile->symbol_obstack, mfree); | |
204 | obstack_chunkfun (&objfile->type_obstack, xmmalloc); | |
205 | obstack_freefun (&objfile->type_obstack, mfree); | |
206 | /* If already in objfile list, unlink it. */ | |
207 | unlink_objfile (objfile); | |
208 | /* Forget things specific to a particular gdb, may have changed. */ | |
209 | objfile->sf = NULL; | |
210 | } | |
211 | else | |
212 | { | |
c906108c | 213 | |
c5aa993b JM |
214 | /* Set up to detect internal memory corruption. MUST be |
215 | done before the first malloc. See comments in | |
216 | init_malloc() and mmcheck(). */ | |
217 | ||
218 | init_malloc (md); | |
219 | ||
220 | objfile = (struct objfile *) | |
221 | xmmalloc (md, sizeof (struct objfile)); | |
222 | memset (objfile, 0, sizeof (struct objfile)); | |
223 | objfile->md = md; | |
224 | objfile->mmfd = fd; | |
225 | objfile->flags |= OBJF_MAPPED; | |
226 | mmalloc_setkey (objfile->md, 0, objfile); | |
227 | obstack_specify_allocation_with_arg (&objfile->psymbol_cache.cache, | |
228 | 0, 0, xmmalloc, mfree, | |
229 | objfile->md); | |
230 | obstack_specify_allocation_with_arg (&objfile->psymbol_obstack, | |
231 | 0, 0, xmmalloc, mfree, | |
232 | objfile->md); | |
233 | obstack_specify_allocation_with_arg (&objfile->symbol_obstack, | |
234 | 0, 0, xmmalloc, mfree, | |
235 | objfile->md); | |
236 | obstack_specify_allocation_with_arg (&objfile->type_obstack, | |
237 | 0, 0, xmmalloc, mfree, | |
238 | objfile->md); | |
239 | } | |
240 | } | |
c906108c | 241 | |
2df3850c | 242 | if ((flags & OBJF_MAPPED) && (objfile == NULL)) |
c5aa993b JM |
243 | { |
244 | warning ("symbol table for '%s' will not be mapped", | |
245 | bfd_get_filename (abfd)); | |
2df3850c | 246 | flags &= ~OBJF_MAPPED; |
c5aa993b JM |
247 | } |
248 | } | |
249 | #else /* !defined(USE_MMALLOC) || !defined(HAVE_MMAP) */ | |
c906108c | 250 | |
2df3850c | 251 | if (flags & OBJF_MAPPED) |
c906108c SS |
252 | { |
253 | warning ("mapped symbol tables are not supported on this machine; missing or broken mmap()."); | |
254 | ||
255 | /* Turn off the global flag so we don't try to do mapped symbol tables | |
c5aa993b JM |
256 | any more, which shuts up gdb unless the user specifically gives the |
257 | "mapped" keyword again. */ | |
c906108c SS |
258 | |
259 | mapped_symbol_files = 0; | |
2df3850c | 260 | flags &= ~OBJF_MAPPED; |
c906108c SS |
261 | } |
262 | ||
c5aa993b | 263 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c SS |
264 | |
265 | /* If we don't support mapped symbol files, didn't ask for the file to be | |
266 | mapped, or failed to open the mapped file for some reason, then revert | |
267 | back to an unmapped objfile. */ | |
268 | ||
269 | if (objfile == NULL) | |
270 | { | |
271 | objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); | |
272 | memset (objfile, 0, sizeof (struct objfile)); | |
c5aa993b JM |
273 | objfile->md = NULL; |
274 | obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0, | |
c906108c | 275 | xmalloc, free); |
c5aa993b | 276 | obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, xmalloc, |
c906108c | 277 | free); |
c5aa993b | 278 | obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, xmalloc, |
c906108c | 279 | free); |
c5aa993b | 280 | obstack_specify_allocation (&objfile->type_obstack, 0, 0, xmalloc, |
c906108c | 281 | free); |
2df3850c | 282 | flags &= ~OBJF_MAPPED; |
c906108c SS |
283 | } |
284 | ||
285 | /* Update the per-objfile information that comes from the bfd, ensuring | |
286 | that any data that is reference is saved in the per-objfile data | |
287 | region. */ | |
288 | ||
c5aa993b JM |
289 | objfile->obfd = abfd; |
290 | if (objfile->name != NULL) | |
c906108c | 291 | { |
c5aa993b | 292 | mfree (objfile->md, objfile->name); |
c906108c SS |
293 | } |
294 | if (abfd != NULL) | |
295 | { | |
c5aa993b JM |
296 | objfile->name = mstrsave (objfile->md, bfd_get_filename (abfd)); |
297 | objfile->mtime = bfd_get_mtime (abfd); | |
c906108c SS |
298 | |
299 | /* Build section table. */ | |
300 | ||
301 | if (build_objfile_section_table (objfile)) | |
302 | { | |
c5aa993b JM |
303 | error ("Can't find the file sections in `%s': %s", |
304 | objfile->name, bfd_errmsg (bfd_get_error ())); | |
c906108c SS |
305 | } |
306 | } | |
307 | ||
308 | /* Add this file onto the tail of the linked list of other such files. */ | |
309 | ||
c5aa993b | 310 | objfile->next = NULL; |
c906108c SS |
311 | if (object_files == NULL) |
312 | object_files = objfile; | |
313 | else | |
314 | { | |
315 | for (last_one = object_files; | |
c5aa993b JM |
316 | last_one->next; |
317 | last_one = last_one->next); | |
318 | last_one->next = objfile; | |
c906108c SS |
319 | } |
320 | ||
2df3850c JM |
321 | /* Save passed in flag bits. */ |
322 | objfile->flags |= flags; | |
c906108c SS |
323 | |
324 | return (objfile); | |
325 | } | |
326 | ||
327 | /* Put OBJFILE at the front of the list. */ | |
328 | ||
329 | void | |
330 | objfile_to_front (objfile) | |
331 | struct objfile *objfile; | |
332 | { | |
333 | struct objfile **objp; | |
334 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
335 | { | |
336 | if (*objp == objfile) | |
337 | { | |
338 | /* Unhook it from where it is. */ | |
339 | *objp = objfile->next; | |
340 | /* Put it in the front. */ | |
341 | objfile->next = object_files; | |
342 | object_files = objfile; | |
343 | break; | |
344 | } | |
345 | } | |
346 | } | |
347 | ||
348 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the | |
349 | list. | |
350 | ||
351 | It is not a bug, or error, to call this function if OBJFILE is not known | |
352 | to be in the current list. This is done in the case of mapped objfiles, | |
353 | for example, just to ensure that the mapped objfile doesn't appear twice | |
354 | in the list. Since the list is threaded, linking in a mapped objfile | |
355 | twice would create a circular list. | |
356 | ||
357 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
358 | unlinking it, just to ensure that we have completely severed any linkages | |
359 | between the OBJFILE and the list. */ | |
360 | ||
361 | void | |
362 | unlink_objfile (objfile) | |
363 | struct objfile *objfile; | |
364 | { | |
c5aa993b | 365 | struct objfile **objpp; |
c906108c | 366 | |
c5aa993b | 367 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
c906108c | 368 | { |
c5aa993b | 369 | if (*objpp == objfile) |
c906108c | 370 | { |
c5aa993b JM |
371 | *objpp = (*objpp)->next; |
372 | objfile->next = NULL; | |
c906108c SS |
373 | break; |
374 | } | |
375 | } | |
376 | } | |
377 | ||
378 | ||
379 | /* Destroy an objfile and all the symtabs and psymtabs under it. Note | |
380 | that as much as possible is allocated on the symbol_obstack and | |
381 | psymbol_obstack, so that the memory can be efficiently freed. | |
382 | ||
383 | Things which we do NOT free because they are not in malloc'd memory | |
384 | or not in memory specific to the objfile include: | |
385 | ||
c5aa993b | 386 | objfile -> sf |
c906108c SS |
387 | |
388 | FIXME: If the objfile is using reusable symbol information (via mmalloc), | |
389 | then we need to take into account the fact that more than one process | |
390 | may be using the symbol information at the same time (when mmalloc is | |
391 | extended to support cooperative locking). When more than one process | |
392 | is using the mapped symbol info, we need to be more careful about when | |
393 | we free objects in the reusable area. */ | |
394 | ||
395 | void | |
396 | free_objfile (objfile) | |
397 | struct objfile *objfile; | |
398 | { | |
399 | /* First do any symbol file specific actions required when we are | |
400 | finished with a particular symbol file. Note that if the objfile | |
401 | is using reusable symbol information (via mmalloc) then each of | |
402 | these routines is responsible for doing the correct thing, either | |
403 | freeing things which are valid only during this particular gdb | |
404 | execution, or leaving them to be reused during the next one. */ | |
405 | ||
c5aa993b | 406 | if (objfile->sf != NULL) |
c906108c | 407 | { |
c5aa993b | 408 | (*objfile->sf->sym_finish) (objfile); |
c906108c SS |
409 | } |
410 | ||
411 | /* We always close the bfd. */ | |
412 | ||
c5aa993b | 413 | if (objfile->obfd != NULL) |
c906108c SS |
414 | { |
415 | char *name = bfd_get_filename (objfile->obfd); | |
c5aa993b | 416 | if (!bfd_close (objfile->obfd)) |
c906108c SS |
417 | warning ("cannot close \"%s\": %s", |
418 | name, bfd_errmsg (bfd_get_error ())); | |
419 | free (name); | |
420 | } | |
421 | ||
422 | /* Remove it from the chain of all objfiles. */ | |
423 | ||
424 | unlink_objfile (objfile); | |
425 | ||
426 | /* If we are going to free the runtime common objfile, mark it | |
427 | as unallocated. */ | |
428 | ||
429 | if (objfile == rt_common_objfile) | |
430 | rt_common_objfile = NULL; | |
431 | ||
432 | /* Before the symbol table code was redone to make it easier to | |
433 | selectively load and remove information particular to a specific | |
434 | linkage unit, gdb used to do these things whenever the monolithic | |
435 | symbol table was blown away. How much still needs to be done | |
436 | is unknown, but we play it safe for now and keep each action until | |
437 | it is shown to be no longer needed. */ | |
c5aa993b | 438 | |
c906108c SS |
439 | #if defined (CLEAR_SOLIB) |
440 | CLEAR_SOLIB (); | |
441 | /* CLEAR_SOLIB closes the bfd's for any shared libraries. But | |
442 | the to_sections for a core file might refer to those bfd's. So | |
443 | detach any core file. */ | |
444 | { | |
445 | struct target_ops *t = find_core_target (); | |
446 | if (t != NULL) | |
447 | (t->to_detach) (NULL, 0); | |
448 | } | |
449 | #endif | |
450 | /* I *think* all our callers call clear_symtab_users. If so, no need | |
451 | to call this here. */ | |
452 | clear_pc_function_cache (); | |
453 | ||
454 | /* The last thing we do is free the objfile struct itself for the | |
455 | non-reusable case, or detach from the mapped file for the reusable | |
456 | case. Note that the mmalloc_detach or the mfree is the last thing | |
457 | we can do with this objfile. */ | |
458 | ||
459 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
460 | ||
c5aa993b | 461 | if (objfile->flags & OBJF_MAPPED) |
c906108c SS |
462 | { |
463 | /* Remember the fd so we can close it. We can't close it before | |
c5aa993b | 464 | doing the detach, and after the detach the objfile is gone. */ |
c906108c SS |
465 | int mmfd; |
466 | ||
c5aa993b JM |
467 | mmfd = objfile->mmfd; |
468 | mmalloc_detach (objfile->md); | |
c906108c SS |
469 | objfile = NULL; |
470 | close (mmfd); | |
471 | } | |
472 | ||
c5aa993b | 473 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c SS |
474 | |
475 | /* If we still have an objfile, then either we don't support reusable | |
476 | objfiles or this one was not reusable. So free it normally. */ | |
477 | ||
478 | if (objfile != NULL) | |
479 | { | |
c5aa993b | 480 | if (objfile->name != NULL) |
c906108c | 481 | { |
c5aa993b | 482 | mfree (objfile->md, objfile->name); |
c906108c SS |
483 | } |
484 | if (objfile->global_psymbols.list) | |
485 | mfree (objfile->md, objfile->global_psymbols.list); | |
486 | if (objfile->static_psymbols.list) | |
487 | mfree (objfile->md, objfile->static_psymbols.list); | |
488 | /* Free the obstacks for non-reusable objfiles */ | |
c2d11a7d | 489 | free_bcache (&objfile->psymbol_cache); |
c5aa993b JM |
490 | obstack_free (&objfile->psymbol_obstack, 0); |
491 | obstack_free (&objfile->symbol_obstack, 0); | |
492 | obstack_free (&objfile->type_obstack, 0); | |
493 | mfree (objfile->md, objfile); | |
c906108c SS |
494 | objfile = NULL; |
495 | } | |
496 | } | |
497 | ||
498 | ||
499 | /* Free all the object files at once and clean up their users. */ | |
500 | ||
501 | void | |
502 | free_all_objfiles () | |
503 | { | |
504 | struct objfile *objfile, *temp; | |
505 | ||
506 | ALL_OBJFILES_SAFE (objfile, temp) | |
c5aa993b JM |
507 | { |
508 | free_objfile (objfile); | |
509 | } | |
c906108c SS |
510 | clear_symtab_users (); |
511 | } | |
512 | \f | |
513 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
514 | entries in new_offsets. */ | |
515 | void | |
516 | objfile_relocate (objfile, new_offsets) | |
517 | struct objfile *objfile; | |
518 | struct section_offsets *new_offsets; | |
519 | { | |
d4f3574e SS |
520 | struct section_offsets *delta = |
521 | (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); | |
c906108c SS |
522 | |
523 | { | |
524 | int i; | |
525 | int something_changed = 0; | |
526 | for (i = 0; i < objfile->num_sections; ++i) | |
527 | { | |
528 | ANOFFSET (delta, i) = | |
529 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); | |
530 | if (ANOFFSET (delta, i) != 0) | |
531 | something_changed = 1; | |
532 | } | |
533 | if (!something_changed) | |
534 | return; | |
535 | } | |
536 | ||
537 | /* OK, get all the symtabs. */ | |
538 | { | |
539 | struct symtab *s; | |
540 | ||
541 | ALL_OBJFILE_SYMTABS (objfile, s) | |
c5aa993b JM |
542 | { |
543 | struct linetable *l; | |
544 | struct blockvector *bv; | |
545 | int i; | |
546 | ||
547 | /* First the line table. */ | |
548 | l = LINETABLE (s); | |
549 | if (l) | |
550 | { | |
551 | for (i = 0; i < l->nitems; ++i) | |
552 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
553 | } | |
c906108c | 554 | |
c5aa993b JM |
555 | /* Don't relocate a shared blockvector more than once. */ |
556 | if (!s->primary) | |
557 | continue; | |
c906108c | 558 | |
c5aa993b JM |
559 | bv = BLOCKVECTOR (s); |
560 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) | |
561 | { | |
562 | struct block *b; | |
563 | int j; | |
564 | ||
565 | b = BLOCKVECTOR_BLOCK (bv, i); | |
566 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
567 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
568 | ||
569 | for (j = 0; j < BLOCK_NSYMS (b); ++j) | |
570 | { | |
571 | struct symbol *sym = BLOCK_SYM (b, j); | |
572 | /* The RS6000 code from which this was taken skipped | |
573 | any symbols in STRUCT_NAMESPACE or UNDEF_NAMESPACE. | |
574 | But I'm leaving out that test, on the theory that | |
575 | they can't possibly pass the tests below. */ | |
576 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
577 | || SYMBOL_CLASS (sym) == LOC_STATIC | |
578 | || SYMBOL_CLASS (sym) == LOC_INDIRECT) | |
579 | && SYMBOL_SECTION (sym) >= 0) | |
580 | { | |
581 | SYMBOL_VALUE_ADDRESS (sym) += | |
582 | ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
583 | } | |
c906108c | 584 | #ifdef MIPS_EFI_SYMBOL_NAME |
c5aa993b | 585 | /* Relocate Extra Function Info for ecoff. */ |
c906108c | 586 | |
c5aa993b JM |
587 | else if (SYMBOL_CLASS (sym) == LOC_CONST |
588 | && SYMBOL_NAMESPACE (sym) == LABEL_NAMESPACE | |
589 | && STRCMP (SYMBOL_NAME (sym), MIPS_EFI_SYMBOL_NAME) == 0) | |
590 | ecoff_relocate_efi (sym, ANOFFSET (delta, | |
c906108c SS |
591 | s->block_line_section)); |
592 | #endif | |
c5aa993b JM |
593 | } |
594 | } | |
595 | } | |
c906108c SS |
596 | } |
597 | ||
598 | { | |
599 | struct partial_symtab *p; | |
600 | ||
601 | ALL_OBJFILE_PSYMTABS (objfile, p) | |
c5aa993b JM |
602 | { |
603 | p->textlow += ANOFFSET (delta, SECT_OFF_TEXT); | |
604 | p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT); | |
605 | } | |
c906108c SS |
606 | } |
607 | ||
608 | { | |
609 | struct partial_symbol **psym; | |
610 | ||
611 | for (psym = objfile->global_psymbols.list; | |
612 | psym < objfile->global_psymbols.next; | |
613 | psym++) | |
614 | if (SYMBOL_SECTION (*psym) >= 0) | |
c5aa993b | 615 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, |
c906108c SS |
616 | SYMBOL_SECTION (*psym)); |
617 | for (psym = objfile->static_psymbols.list; | |
618 | psym < objfile->static_psymbols.next; | |
619 | psym++) | |
620 | if (SYMBOL_SECTION (*psym) >= 0) | |
c5aa993b | 621 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, |
c906108c SS |
622 | SYMBOL_SECTION (*psym)); |
623 | } | |
624 | ||
625 | { | |
626 | struct minimal_symbol *msym; | |
627 | ALL_OBJFILE_MSYMBOLS (objfile, msym) | |
628 | if (SYMBOL_SECTION (msym) >= 0) | |
c5aa993b | 629 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); |
c906108c SS |
630 | } |
631 | /* Relocating different sections by different amounts may cause the symbols | |
632 | to be out of order. */ | |
633 | msymbols_sort (objfile); | |
634 | ||
635 | { | |
636 | int i; | |
637 | for (i = 0; i < objfile->num_sections; ++i) | |
638 | ANOFFSET (objfile->section_offsets, i) = ANOFFSET (new_offsets, i); | |
639 | } | |
640 | ||
641 | { | |
642 | struct obj_section *s; | |
643 | bfd *abfd; | |
644 | ||
645 | abfd = objfile->obfd; | |
646 | ||
96baa820 | 647 | ALL_OBJFILE_OSECTIONS (objfile, s) |
c906108c SS |
648 | { |
649 | flagword flags; | |
650 | ||
651 | flags = bfd_get_section_flags (abfd, s->the_bfd_section); | |
652 | ||
653 | if (flags & SEC_CODE) | |
654 | { | |
c5aa993b | 655 | s->addr += ANOFFSET (delta, SECT_OFF_TEXT); |
c906108c SS |
656 | s->endaddr += ANOFFSET (delta, SECT_OFF_TEXT); |
657 | } | |
658 | else if (flags & (SEC_DATA | SEC_LOAD)) | |
659 | { | |
c5aa993b | 660 | s->addr += ANOFFSET (delta, SECT_OFF_DATA); |
c906108c SS |
661 | s->endaddr += ANOFFSET (delta, SECT_OFF_DATA); |
662 | } | |
663 | else if (flags & SEC_ALLOC) | |
664 | { | |
c5aa993b | 665 | s->addr += ANOFFSET (delta, SECT_OFF_BSS); |
c906108c SS |
666 | s->endaddr += ANOFFSET (delta, SECT_OFF_BSS); |
667 | } | |
668 | } | |
669 | } | |
670 | ||
c5aa993b | 671 | if (objfile->ei.entry_point != ~(CORE_ADDR) 0) |
c906108c SS |
672 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT); |
673 | ||
674 | if (objfile->ei.entry_func_lowpc != INVALID_ENTRY_LOWPC) | |
675 | { | |
c5aa993b | 676 | objfile->ei.entry_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); |
c906108c SS |
677 | objfile->ei.entry_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT); |
678 | } | |
679 | ||
680 | if (objfile->ei.entry_file_lowpc != INVALID_ENTRY_LOWPC) | |
681 | { | |
c5aa993b | 682 | objfile->ei.entry_file_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); |
c906108c SS |
683 | objfile->ei.entry_file_highpc += ANOFFSET (delta, SECT_OFF_TEXT); |
684 | } | |
685 | ||
686 | if (objfile->ei.main_func_lowpc != INVALID_ENTRY_LOWPC) | |
687 | { | |
c5aa993b | 688 | objfile->ei.main_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); |
c906108c SS |
689 | objfile->ei.main_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT); |
690 | } | |
691 | ||
692 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
693 | breakpoint_re_set (); | |
694 | } | |
695 | \f | |
696 | /* Many places in gdb want to test just to see if we have any partial | |
697 | symbols available. This function returns zero if none are currently | |
698 | available, nonzero otherwise. */ | |
699 | ||
700 | int | |
701 | have_partial_symbols () | |
702 | { | |
703 | struct objfile *ofp; | |
704 | ||
705 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
706 | { |
707 | if (ofp->psymtabs != NULL) | |
708 | { | |
709 | return 1; | |
710 | } | |
711 | } | |
c906108c SS |
712 | return 0; |
713 | } | |
714 | ||
715 | /* Many places in gdb want to test just to see if we have any full | |
716 | symbols available. This function returns zero if none are currently | |
717 | available, nonzero otherwise. */ | |
718 | ||
719 | int | |
720 | have_full_symbols () | |
721 | { | |
722 | struct objfile *ofp; | |
723 | ||
724 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
725 | { |
726 | if (ofp->symtabs != NULL) | |
727 | { | |
728 | return 1; | |
729 | } | |
730 | } | |
c906108c SS |
731 | return 0; |
732 | } | |
733 | ||
734 | ||
735 | /* This operations deletes all objfile entries that represent solibs that | |
736 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
737 | command. | |
c5aa993b | 738 | */ |
c906108c SS |
739 | void |
740 | objfile_purge_solibs () | |
741 | { | |
c5aa993b JM |
742 | struct objfile *objf; |
743 | struct objfile *temp; | |
c906108c SS |
744 | |
745 | ALL_OBJFILES_SAFE (objf, temp) | |
746 | { | |
747 | /* We assume that the solib package has been purged already, or will | |
748 | be soon. | |
c5aa993b | 749 | */ |
2df3850c | 750 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
c906108c SS |
751 | free_objfile (objf); |
752 | } | |
753 | } | |
754 | ||
755 | ||
756 | /* Many places in gdb want to test just to see if we have any minimal | |
757 | symbols available. This function returns zero if none are currently | |
758 | available, nonzero otherwise. */ | |
759 | ||
760 | int | |
761 | have_minimal_symbols () | |
762 | { | |
763 | struct objfile *ofp; | |
764 | ||
765 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
766 | { |
767 | if (ofp->msymbols != NULL) | |
768 | { | |
769 | return 1; | |
770 | } | |
771 | } | |
c906108c SS |
772 | return 0; |
773 | } | |
774 | ||
775 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
776 | ||
777 | /* Given the name of a mapped symbol file in SYMSFILENAME, and the timestamp | |
778 | of the corresponding symbol file in MTIME, try to open an existing file | |
779 | with the name SYMSFILENAME and verify it is more recent than the base | |
780 | file by checking it's timestamp against MTIME. | |
781 | ||
782 | If SYMSFILENAME does not exist (or can't be stat'd), simply returns -1. | |
783 | ||
784 | If SYMSFILENAME does exist, but is out of date, we check to see if the | |
785 | user has specified creation of a mapped file. If so, we don't issue | |
786 | any warning message because we will be creating a new mapped file anyway, | |
787 | overwriting the old one. If not, then we issue a warning message so that | |
788 | the user will know why we aren't using this existing mapped symbol file. | |
789 | In either case, we return -1. | |
790 | ||
791 | If SYMSFILENAME does exist and is not out of date, but can't be opened for | |
792 | some reason, then prints an appropriate system error message and returns -1. | |
793 | ||
794 | Otherwise, returns the open file descriptor. */ | |
795 | ||
796 | static int | |
2df3850c | 797 | open_existing_mapped_file (symsfilename, mtime, flags) |
c906108c SS |
798 | char *symsfilename; |
799 | long mtime; | |
2df3850c | 800 | int flags; |
c906108c SS |
801 | { |
802 | int fd = -1; | |
803 | struct stat sbuf; | |
804 | ||
805 | if (stat (symsfilename, &sbuf) == 0) | |
806 | { | |
807 | if (sbuf.st_mtime < mtime) | |
808 | { | |
2df3850c | 809 | if (!(flags & OBJF_MAPPED)) |
c906108c SS |
810 | { |
811 | warning ("mapped symbol file `%s' is out of date, ignored it", | |
812 | symsfilename); | |
813 | } | |
814 | } | |
815 | else if ((fd = open (symsfilename, O_RDWR)) < 0) | |
816 | { | |
817 | if (error_pre_print) | |
818 | { | |
819 | printf_unfiltered (error_pre_print); | |
820 | } | |
821 | print_sys_errmsg (symsfilename, errno); | |
822 | } | |
823 | } | |
824 | return (fd); | |
825 | } | |
826 | ||
827 | /* Look for a mapped symbol file that corresponds to FILENAME and is more | |
828 | recent than MTIME. If MAPPED is nonzero, the user has asked that gdb | |
829 | use a mapped symbol file for this file, so create a new one if one does | |
830 | not currently exist. | |
831 | ||
832 | If found, then return an open file descriptor for the file, otherwise | |
833 | return -1. | |
834 | ||
835 | This routine is responsible for implementing the policy that generates | |
836 | the name of the mapped symbol file from the name of a file containing | |
837 | symbols that gdb would like to read. Currently this policy is to append | |
838 | ".syms" to the name of the file. | |
839 | ||
840 | This routine is also responsible for implementing the policy that | |
841 | determines where the mapped symbol file is found (the search path). | |
842 | This policy is that when reading an existing mapped file, a file of | |
843 | the correct name in the current directory takes precedence over a | |
844 | file of the correct name in the same directory as the symbol file. | |
845 | When creating a new mapped file, it is always created in the current | |
846 | directory. This helps to minimize the chances of a user unknowingly | |
847 | creating big mapped files in places like /bin and /usr/local/bin, and | |
848 | allows a local copy to override a manually installed global copy (in | |
849 | /bin for example). */ | |
850 | ||
851 | static int | |
2df3850c | 852 | open_mapped_file (filename, mtime, flags) |
c906108c SS |
853 | char *filename; |
854 | long mtime; | |
2df3850c | 855 | int flags; |
c906108c SS |
856 | { |
857 | int fd; | |
858 | char *symsfilename; | |
859 | ||
860 | /* First try to open an existing file in the current directory, and | |
861 | then try the directory where the symbol file is located. */ | |
862 | ||
863 | symsfilename = concat ("./", basename (filename), ".syms", (char *) NULL); | |
2df3850c | 864 | if ((fd = open_existing_mapped_file (symsfilename, mtime, flags)) < 0) |
c906108c SS |
865 | { |
866 | free (symsfilename); | |
867 | symsfilename = concat (filename, ".syms", (char *) NULL); | |
868 | fd = open_existing_mapped_file (symsfilename, mtime, mapped); | |
869 | } | |
870 | ||
871 | /* If we don't have an open file by now, then either the file does not | |
872 | already exist, or the base file has changed since it was created. In | |
873 | either case, if the user has specified use of a mapped file, then | |
874 | create a new mapped file, truncating any existing one. If we can't | |
875 | create one, print a system error message saying why we can't. | |
876 | ||
877 | By default the file is rw for everyone, with the user's umask taking | |
878 | care of turning off the permissions the user wants off. */ | |
879 | ||
880 | if ((fd < 0) && mapped) | |
881 | { | |
882 | free (symsfilename); | |
883 | symsfilename = concat ("./", basename (filename), ".syms", | |
884 | (char *) NULL); | |
885 | if ((fd = open (symsfilename, O_RDWR | O_CREAT | O_TRUNC, 0666)) < 0) | |
886 | { | |
887 | if (error_pre_print) | |
888 | { | |
889 | printf_unfiltered (error_pre_print); | |
890 | } | |
891 | print_sys_errmsg (symsfilename, errno); | |
892 | } | |
893 | } | |
894 | ||
895 | free (symsfilename); | |
896 | return (fd); | |
897 | } | |
898 | ||
899 | static PTR | |
900 | map_to_file (fd) | |
901 | int fd; | |
902 | { | |
903 | PTR md; | |
904 | CORE_ADDR mapto; | |
905 | ||
906 | md = mmalloc_attach (fd, (PTR) 0); | |
907 | if (md != NULL) | |
908 | { | |
909 | mapto = (CORE_ADDR) mmalloc_getkey (md, 1); | |
910 | md = mmalloc_detach (md); | |
911 | if (md != NULL) | |
912 | { | |
913 | /* FIXME: should figure out why detach failed */ | |
914 | md = NULL; | |
915 | } | |
916 | else if (mapto != (CORE_ADDR) NULL) | |
917 | { | |
918 | /* This mapping file needs to be remapped at "mapto" */ | |
919 | md = mmalloc_attach (fd, (PTR) mapto); | |
920 | } | |
921 | else | |
922 | { | |
923 | /* This is a freshly created mapping file. */ | |
924 | mapto = (CORE_ADDR) mmalloc_findbase (20 * 1024 * 1024); | |
925 | if (mapto != 0) | |
926 | { | |
927 | /* To avoid reusing the freshly created mapping file, at the | |
c5aa993b JM |
928 | address selected by mmap, we must truncate it before trying |
929 | to do an attach at the address we want. */ | |
c906108c SS |
930 | ftruncate (fd, 0); |
931 | md = mmalloc_attach (fd, (PTR) mapto); | |
932 | if (md != NULL) | |
933 | { | |
934 | mmalloc_setkey (md, 1, (PTR) mapto); | |
935 | } | |
936 | } | |
937 | } | |
938 | } | |
939 | return (md); | |
940 | } | |
941 | ||
c5aa993b | 942 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c SS |
943 | |
944 | /* Returns a section whose range includes PC and SECTION, | |
945 | or NULL if none found. Note the distinction between the return type, | |
946 | struct obj_section (which is defined in gdb), and the input type | |
947 | struct sec (which is a bfd-defined data type). The obj_section | |
948 | contains a pointer to the bfd struct sec section. */ | |
949 | ||
950 | struct obj_section * | |
951 | find_pc_sect_section (pc, section) | |
952 | CORE_ADDR pc; | |
953 | struct sec *section; | |
954 | { | |
955 | struct obj_section *s; | |
956 | struct objfile *objfile; | |
c5aa993b | 957 | |
96baa820 | 958 | ALL_OBJSECTIONS (objfile, s) |
c5aa993b JM |
959 | if ((section == 0 || section == s->the_bfd_section) && |
960 | s->addr <= pc && pc < s->endaddr) | |
c5aa993b | 961 | return (s); |
c906108c | 962 | |
c5aa993b | 963 | return (NULL); |
c906108c SS |
964 | } |
965 | ||
966 | /* Returns a section whose range includes PC or NULL if none found. | |
967 | Backward compatibility, no section. */ | |
968 | ||
969 | struct obj_section * | |
c5aa993b | 970 | find_pc_section (pc) |
c906108c SS |
971 | CORE_ADDR pc; |
972 | { | |
973 | return find_pc_sect_section (pc, find_pc_mapped_section (pc)); | |
974 | } | |
c5aa993b | 975 | |
c906108c SS |
976 | |
977 | /* In SVR4, we recognize a trampoline by it's section name. | |
978 | That is, if the pc is in a section named ".plt" then we are in | |
979 | a trampoline. */ | |
980 | ||
981 | int | |
c5aa993b | 982 | in_plt_section (pc, name) |
c906108c SS |
983 | CORE_ADDR pc; |
984 | char *name; | |
985 | { | |
986 | struct obj_section *s; | |
987 | int retval = 0; | |
c5aa993b JM |
988 | |
989 | s = find_pc_section (pc); | |
990 | ||
c906108c SS |
991 | retval = (s != NULL |
992 | && s->the_bfd_section->name != NULL | |
993 | && STREQ (s->the_bfd_section->name, ".plt")); | |
c5aa993b | 994 | return (retval); |
c906108c | 995 | } |
7be570e7 JM |
996 | |
997 | /* Return nonzero if NAME is in the import list of OBJFILE. Else | |
998 | return zero. */ | |
999 | ||
1000 | int | |
1001 | is_in_import_list (name, objfile) | |
1002 | char *name; | |
1003 | struct objfile *objfile; | |
1004 | { | |
1005 | register int i; | |
1006 | ||
1007 | if (!objfile || !name || !*name) | |
1008 | return 0; | |
1009 | ||
1010 | for (i = 0; i < objfile->import_list_size; i++) | |
1011 | if (objfile->import_list[i] && STREQ (name, objfile->import_list[i])) | |
1012 | return 1; | |
1013 | return 0; | |
1014 | } | |
1015 |