Commit | Line | Data |
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1ab3bf1b | 1 | /* GDB routines for manipulating objfiles. |
02b40a19 | 2 | Copyright 1992, 1993, 1994, 1995 Free Software Foundation, Inc. |
1ab3bf1b JG |
3 | Contributed by Cygnus Support, using pieces from other GDB modules. |
4 | ||
5 | This file is part of GDB. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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 | |
6c9638b4 | 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
1ab3bf1b JG |
20 | |
21 | /* This file contains support routines for creating, manipulating, and | |
22 | destroying objfile structures. */ | |
23 | ||
1ab3bf1b JG |
24 | #include "defs.h" |
25 | #include "bfd.h" /* Binary File Description */ | |
26 | #include "symtab.h" | |
27 | #include "symfile.h" | |
5e2e79f8 | 28 | #include "objfiles.h" |
610a7e74 | 29 | #include "gdb-stabs.h" |
c5198d93 | 30 | #include "target.h" |
1ab3bf1b | 31 | |
318bf84f | 32 | #include <sys/types.h> |
2b576293 | 33 | #include "gdb_stat.h" |
318bf84f | 34 | #include <fcntl.h> |
f309ad95 | 35 | #include "obstack.h" |
2b576293 | 36 | #include "gdb_string.h" |
1ab3bf1b | 37 | |
318bf84f FF |
38 | /* Prototypes for local functions */ |
39 | ||
0728afad | 40 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) |
1867b3be FF |
41 | |
42 | static int | |
43 | open_existing_mapped_file PARAMS ((char *, long, int)); | |
44 | ||
318bf84f | 45 | static int |
b0246b3b | 46 | open_mapped_file PARAMS ((char *filename, long mtime, int mapped)); |
318bf84f | 47 | |
54109914 FF |
48 | static PTR |
49 | map_to_file PARAMS ((int)); | |
50 | ||
0728afad | 51 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
1867b3be | 52 | |
b607efe7 FF |
53 | static void |
54 | add_to_objfile_sections PARAMS ((bfd *, sec_ptr, PTR)); | |
55 | ||
5e2e79f8 FF |
56 | /* Externally visible variables that are owned by this module. |
57 | See declarations in objfile.h for more info. */ | |
1ab3bf1b JG |
58 | |
59 | struct objfile *object_files; /* Linked list of all objfiles */ | |
5e2e79f8 FF |
60 | struct objfile *current_objfile; /* For symbol file being read in */ |
61 | struct objfile *symfile_objfile; /* Main symbol table loaded from */ | |
02b40a19 | 62 | struct objfile *rt_common_objfile; /* For runtime common symbols */ |
5e2e79f8 | 63 | |
318bf84f | 64 | int mapped_symbol_files; /* Try to use mapped symbol files */ |
1ab3bf1b | 65 | |
73d0fc78 RP |
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 | static void | |
71 | add_to_objfile_sections (abfd, asect, objfile_p_char) | |
72 | bfd *abfd; | |
73 | sec_ptr asect; | |
74 | PTR objfile_p_char; | |
75 | { | |
76 | struct objfile *objfile = (struct objfile *) objfile_p_char; | |
77 | struct obj_section section; | |
78 | flagword aflag; | |
79 | ||
80 | aflag = bfd_get_section_flags (abfd, asect); | |
e14316e7 | 81 | if (!(aflag & SEC_ALLOC)) |
73d0fc78 RP |
82 | return; |
83 | if (0 == bfd_section_size (abfd, asect)) | |
84 | return; | |
85 | section.offset = 0; | |
4365c36c | 86 | section.objfile = objfile; |
94d4b713 | 87 | section.the_bfd_section = asect; |
b9580b81 | 88 | section.ovly_mapped = 0; |
73d0fc78 RP |
89 | section.addr = bfd_section_vma (abfd, asect); |
90 | section.endaddr = section.addr + bfd_section_size (abfd, asect); | |
5579919f | 91 | obstack_grow (&objfile->psymbol_obstack, (char *) §ion, sizeof(section)); |
5573d7d4 | 92 | objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1); |
73d0fc78 RP |
93 | } |
94 | ||
95 | /* Builds a section table for OBJFILE. | |
4d57c599 JK |
96 | Returns 0 if OK, 1 on error (in which case bfd_error contains the |
97 | error). */ | |
73d0fc78 | 98 | |
4d57c599 | 99 | int |
73d0fc78 RP |
100 | build_objfile_section_table (objfile) |
101 | struct objfile *objfile; | |
102 | { | |
e14316e7 JK |
103 | /* objfile->sections can be already set when reading a mapped symbol |
104 | file. I believe that we do need to rebuild the section table in | |
105 | this case (we rebuild other things derived from the bfd), but we | |
106 | can't free the old one (it's in the psymbol_obstack). So we just | |
107 | waste some memory. */ | |
73d0fc78 RP |
108 | |
109 | objfile->sections_end = 0; | |
110 | bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *)objfile); | |
ccd87bf2 JK |
111 | objfile->sections = (struct obj_section *) |
112 | obstack_finish (&objfile->psymbol_obstack); | |
5573d7d4 | 113 | objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end; |
73d0fc78 RP |
114 | return(0); |
115 | } | |
116 | ||
b0246b3b FF |
117 | /* Given a pointer to an initialized bfd (ABFD) and a flag that indicates |
118 | whether or not an objfile is to be mapped (MAPPED), allocate a new objfile | |
119 | struct, fill it in as best we can, link it into the list of all known | |
120 | objfiles, and return a pointer to the new objfile struct. */ | |
1ab3bf1b JG |
121 | |
122 | struct objfile * | |
b0246b3b | 123 | allocate_objfile (abfd, mapped) |
1ab3bf1b | 124 | bfd *abfd; |
318bf84f | 125 | int mapped; |
1ab3bf1b | 126 | { |
318bf84f | 127 | struct objfile *objfile = NULL; |
7f4c8595 | 128 | struct objfile *last_one = NULL; |
318bf84f FF |
129 | |
130 | mapped |= mapped_symbol_files; | |
131 | ||
0728afad | 132 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) |
7a9eb4c4 | 133 | if (abfd != NULL) |
100f92e2 | 134 | { |
318bf84f | 135 | |
100f92e2 JK |
136 | /* If we can support mapped symbol files, try to open/reopen the |
137 | mapped file that corresponds to the file from which we wish to | |
138 | read symbols. If the objfile is to be mapped, we must malloc | |
139 | the structure itself using the mmap version, and arrange that | |
140 | all memory allocation for the objfile uses the mmap routines. | |
141 | If we are reusing an existing mapped file, from which we get | |
142 | our objfile pointer, we have to make sure that we update the | |
143 | pointers to the alloc/free functions in the obstack, in case | |
144 | these functions have moved within the current gdb. */ | |
145 | ||
146 | int fd; | |
147 | ||
148 | fd = open_mapped_file (bfd_get_filename (abfd), bfd_get_mtime (abfd), | |
149 | mapped); | |
150 | if (fd >= 0) | |
151 | { | |
100f92e2 JK |
152 | PTR md; |
153 | ||
54109914 | 154 | if ((md = map_to_file (fd)) == NULL) |
100f92e2 JK |
155 | { |
156 | close (fd); | |
157 | } | |
158 | else if ((objfile = (struct objfile *) mmalloc_getkey (md, 0)) != NULL) | |
159 | { | |
160 | /* Update memory corruption handler function addresses. */ | |
161 | init_malloc (md); | |
162 | objfile -> md = md; | |
163 | objfile -> mmfd = fd; | |
164 | /* Update pointers to functions to *our* copies */ | |
2ad5709f FF |
165 | obstack_chunkfun (&objfile -> psymbol_cache.cache, xmmalloc); |
166 | obstack_freefun (&objfile -> psymbol_cache.cache, mfree); | |
100f92e2 JK |
167 | obstack_chunkfun (&objfile -> psymbol_obstack, xmmalloc); |
168 | obstack_freefun (&objfile -> psymbol_obstack, mfree); | |
169 | obstack_chunkfun (&objfile -> symbol_obstack, xmmalloc); | |
170 | obstack_freefun (&objfile -> symbol_obstack, mfree); | |
171 | obstack_chunkfun (&objfile -> type_obstack, xmmalloc); | |
172 | obstack_freefun (&objfile -> type_obstack, mfree); | |
173 | /* If already in objfile list, unlink it. */ | |
174 | unlink_objfile (objfile); | |
175 | /* Forget things specific to a particular gdb, may have changed. */ | |
176 | objfile -> sf = NULL; | |
177 | } | |
178 | else | |
179 | { | |
180 | ||
181 | /* Set up to detect internal memory corruption. MUST be | |
182 | done before the first malloc. See comments in | |
183 | init_malloc() and mmcheck(). */ | |
184 | ||
185 | init_malloc (md); | |
186 | ||
187 | objfile = (struct objfile *) | |
188 | xmmalloc (md, sizeof (struct objfile)); | |
189 | memset (objfile, 0, sizeof (struct objfile)); | |
190 | objfile -> md = md; | |
191 | objfile -> mmfd = fd; | |
192 | objfile -> flags |= OBJF_MAPPED; | |
193 | mmalloc_setkey (objfile -> md, 0, objfile); | |
2ad5709f FF |
194 | obstack_specify_allocation_with_arg (&objfile -> psymbol_cache.cache, |
195 | 0, 0, xmmalloc, mfree, | |
196 | objfile -> md); | |
100f92e2 JK |
197 | obstack_specify_allocation_with_arg (&objfile -> psymbol_obstack, |
198 | 0, 0, xmmalloc, mfree, | |
199 | objfile -> md); | |
200 | obstack_specify_allocation_with_arg (&objfile -> symbol_obstack, | |
201 | 0, 0, xmmalloc, mfree, | |
202 | objfile -> md); | |
203 | obstack_specify_allocation_with_arg (&objfile -> type_obstack, | |
204 | 0, 0, xmmalloc, mfree, | |
205 | objfile -> md); | |
206 | } | |
207 | } | |
208 | ||
209 | if (mapped && (objfile == NULL)) | |
210 | { | |
211 | warning ("symbol table for '%s' will not be mapped", | |
212 | bfd_get_filename (abfd)); | |
213 | } | |
214 | } | |
0728afad | 215 | #else /* !defined(USE_MMALLOC) || !defined(HAVE_MMAP) */ |
1ab3bf1b | 216 | |
318bf84f | 217 | if (mapped) |
1ab3bf1b | 218 | { |
e7b6403a | 219 | warning ("mapped symbol tables are not supported on this machine; missing or broken mmap()."); |
318bf84f FF |
220 | |
221 | /* Turn off the global flag so we don't try to do mapped symbol tables | |
222 | any more, which shuts up gdb unless the user specifically gives the | |
223 | "mapped" keyword again. */ | |
224 | ||
225 | mapped_symbol_files = 0; | |
1ab3bf1b | 226 | } |
318bf84f | 227 | |
0728afad | 228 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
318bf84f FF |
229 | |
230 | /* If we don't support mapped symbol files, didn't ask for the file to be | |
231 | mapped, or failed to open the mapped file for some reason, then revert | |
232 | back to an unmapped objfile. */ | |
233 | ||
234 | if (objfile == NULL) | |
1ab3bf1b JG |
235 | { |
236 | objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); | |
4ed3a9ea | 237 | memset (objfile, 0, sizeof (struct objfile)); |
318bf84f | 238 | objfile -> md = NULL; |
2ad5709f FF |
239 | obstack_specify_allocation (&objfile -> psymbol_cache.cache, 0, 0, |
240 | xmalloc, free); | |
cd46ffad FF |
241 | obstack_specify_allocation (&objfile -> psymbol_obstack, 0, 0, xmalloc, |
242 | free); | |
243 | obstack_specify_allocation (&objfile -> symbol_obstack, 0, 0, xmalloc, | |
244 | free); | |
245 | obstack_specify_allocation (&objfile -> type_obstack, 0, 0, xmalloc, | |
246 | free); | |
1ab3bf1b JG |
247 | } |
248 | ||
b0246b3b FF |
249 | /* Update the per-objfile information that comes from the bfd, ensuring |
250 | that any data that is reference is saved in the per-objfile data | |
251 | region. */ | |
1ab3bf1b JG |
252 | |
253 | objfile -> obfd = abfd; | |
2d6d969c FF |
254 | if (objfile -> name != NULL) |
255 | { | |
256 | mfree (objfile -> md, objfile -> name); | |
257 | } | |
7a9eb4c4 PB |
258 | if (abfd != NULL) |
259 | { | |
260 | objfile -> name = mstrsave (objfile -> md, bfd_get_filename (abfd)); | |
261 | objfile -> mtime = bfd_get_mtime (abfd); | |
1ab3bf1b | 262 | |
7a9eb4c4 | 263 | /* Build section table. */ |
73d0fc78 | 264 | |
7a9eb4c4 PB |
265 | if (build_objfile_section_table (objfile)) |
266 | { | |
267 | error ("Can't find the file sections in `%s': %s", | |
268 | objfile -> name, bfd_errmsg (bfd_get_error ())); | |
269 | } | |
73d0fc78 RP |
270 | } |
271 | ||
7f4c8595 | 272 | /* Add this file onto the tail of the linked list of other such files. */ |
1ab3bf1b | 273 | |
7f4c8595 SS |
274 | objfile -> next = NULL; |
275 | if (object_files == NULL) | |
276 | object_files = objfile; | |
277 | else | |
278 | { | |
279 | for (last_one = object_files; | |
280 | last_one -> next; | |
281 | last_one = last_one -> next); | |
282 | last_one -> next = objfile; | |
283 | } | |
1ab3bf1b JG |
284 | return (objfile); |
285 | } | |
286 | ||
3a470454 JK |
287 | /* Put OBJFILE at the front of the list. */ |
288 | ||
289 | void | |
290 | objfile_to_front (objfile) | |
291 | struct objfile *objfile; | |
292 | { | |
293 | struct objfile **objp; | |
294 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
295 | { | |
296 | if (*objp == objfile) | |
297 | { | |
298 | /* Unhook it from where it is. */ | |
299 | *objp = objfile->next; | |
300 | /* Put it in the front. */ | |
301 | objfile->next = object_files; | |
302 | object_files = objfile; | |
303 | break; | |
304 | } | |
305 | } | |
306 | } | |
307 | ||
6c316cfd FF |
308 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the |
309 | list. | |
310 | ||
311 | It is not a bug, or error, to call this function if OBJFILE is not known | |
312 | to be in the current list. This is done in the case of mapped objfiles, | |
313 | for example, just to ensure that the mapped objfile doesn't appear twice | |
314 | in the list. Since the list is threaded, linking in a mapped objfile | |
315 | twice would create a circular list. | |
316 | ||
317 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
318 | unlinking it, just to ensure that we have completely severed any linkages | |
319 | between the OBJFILE and the list. */ | |
320 | ||
321 | void | |
322 | unlink_objfile (objfile) | |
323 | struct objfile *objfile; | |
324 | { | |
325 | struct objfile** objpp; | |
326 | ||
327 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp) -> next)) | |
328 | { | |
329 | if (*objpp == objfile) | |
330 | { | |
331 | *objpp = (*objpp) -> next; | |
332 | objfile -> next = NULL; | |
333 | break; | |
334 | } | |
335 | } | |
336 | } | |
337 | ||
1ab3bf1b JG |
338 | |
339 | /* Destroy an objfile and all the symtabs and psymtabs under it. Note | |
340 | that as much as possible is allocated on the symbol_obstack and | |
80d68b1d FF |
341 | psymbol_obstack, so that the memory can be efficiently freed. |
342 | ||
343 | Things which we do NOT free because they are not in malloc'd memory | |
344 | or not in memory specific to the objfile include: | |
345 | ||
346 | objfile -> sf | |
347 | ||
2d6d969c FF |
348 | FIXME: If the objfile is using reusable symbol information (via mmalloc), |
349 | then we need to take into account the fact that more than one process | |
350 | may be using the symbol information at the same time (when mmalloc is | |
351 | extended to support cooperative locking). When more than one process | |
352 | is using the mapped symbol info, we need to be more careful about when | |
353 | we free objects in the reusable area. */ | |
1ab3bf1b JG |
354 | |
355 | void | |
356 | free_objfile (objfile) | |
357 | struct objfile *objfile; | |
358 | { | |
2d6d969c FF |
359 | /* First do any symbol file specific actions required when we are |
360 | finished with a particular symbol file. Note that if the objfile | |
361 | is using reusable symbol information (via mmalloc) then each of | |
362 | these routines is responsible for doing the correct thing, either | |
363 | freeing things which are valid only during this particular gdb | |
364 | execution, or leaving them to be reused during the next one. */ | |
1ab3bf1b | 365 | |
80d68b1d FF |
366 | if (objfile -> sf != NULL) |
367 | { | |
368 | (*objfile -> sf -> sym_finish) (objfile); | |
369 | } | |
2d6d969c FF |
370 | |
371 | /* We always close the bfd. */ | |
372 | ||
80d68b1d | 373 | if (objfile -> obfd != NULL) |
1ab3bf1b | 374 | { |
346168a2 | 375 | char *name = bfd_get_filename (objfile->obfd); |
9de0904c JK |
376 | if (!bfd_close (objfile -> obfd)) |
377 | warning ("cannot close \"%s\": %s", | |
378 | name, bfd_errmsg (bfd_get_error ())); | |
346168a2 | 379 | free (name); |
1ab3bf1b JG |
380 | } |
381 | ||
2d6d969c | 382 | /* Remove it from the chain of all objfiles. */ |
1ab3bf1b | 383 | |
6c316cfd | 384 | unlink_objfile (objfile); |
1ab3bf1b | 385 | |
02b40a19 PS |
386 | /* If we are going to free the runtime common objfile, mark it |
387 | as unallocated. */ | |
388 | ||
389 | if (objfile == rt_common_objfile) | |
390 | rt_common_objfile = NULL; | |
391 | ||
1ab3bf1b JG |
392 | /* Before the symbol table code was redone to make it easier to |
393 | selectively load and remove information particular to a specific | |
394 | linkage unit, gdb used to do these things whenever the monolithic | |
395 | symbol table was blown away. How much still needs to be done | |
396 | is unknown, but we play it safe for now and keep each action until | |
397 | it is shown to be no longer needed. */ | |
398 | ||
1ab3bf1b JG |
399 | #if defined (CLEAR_SOLIB) |
400 | CLEAR_SOLIB (); | |
c5198d93 JK |
401 | /* CLEAR_SOLIB closes the bfd's for any shared libraries. But |
402 | the to_sections for a core file might refer to those bfd's. So | |
403 | detach any core file. */ | |
404 | { | |
405 | struct target_ops *t = find_core_target (); | |
406 | if (t != NULL) | |
407 | (t->to_detach) (NULL, 0); | |
408 | } | |
1ab3bf1b | 409 | #endif |
4d57c599 JK |
410 | /* I *think* all our callers call clear_symtab_users. If so, no need |
411 | to call this here. */ | |
1ab3bf1b JG |
412 | clear_pc_function_cache (); |
413 | ||
2d6d969c FF |
414 | /* The last thing we do is free the objfile struct itself for the |
415 | non-reusable case, or detach from the mapped file for the reusable | |
416 | case. Note that the mmalloc_detach or the mfree is the last thing | |
417 | we can do with this objfile. */ | |
1ab3bf1b | 418 | |
0728afad | 419 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) |
55b3ef9a | 420 | |
2d6d969c FF |
421 | if (objfile -> flags & OBJF_MAPPED) |
422 | { | |
423 | /* Remember the fd so we can close it. We can't close it before | |
424 | doing the detach, and after the detach the objfile is gone. */ | |
100f92e2 JK |
425 | int mmfd; |
426 | ||
2d6d969c FF |
427 | mmfd = objfile -> mmfd; |
428 | mmalloc_detach (objfile -> md); | |
55b3ef9a | 429 | objfile = NULL; |
4ed3a9ea | 430 | close (mmfd); |
2d6d969c | 431 | } |
55b3ef9a | 432 | |
0728afad | 433 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
55b3ef9a FF |
434 | |
435 | /* If we still have an objfile, then either we don't support reusable | |
436 | objfiles or this one was not reusable. So free it normally. */ | |
437 | ||
438 | if (objfile != NULL) | |
2d6d969c FF |
439 | { |
440 | if (objfile -> name != NULL) | |
441 | { | |
442 | mfree (objfile -> md, objfile -> name); | |
443 | } | |
346168a2 JG |
444 | if (objfile->global_psymbols.list) |
445 | mfree (objfile->md, objfile->global_psymbols.list); | |
446 | if (objfile->static_psymbols.list) | |
447 | mfree (objfile->md, objfile->static_psymbols.list); | |
2d6d969c | 448 | /* Free the obstacks for non-reusable objfiles */ |
2ad5709f | 449 | obstack_free (&objfile -> psymbol_cache.cache, 0); |
2d6d969c FF |
450 | obstack_free (&objfile -> psymbol_obstack, 0); |
451 | obstack_free (&objfile -> symbol_obstack, 0); | |
452 | obstack_free (&objfile -> type_obstack, 0); | |
453 | mfree (objfile -> md, objfile); | |
55b3ef9a | 454 | objfile = NULL; |
2d6d969c | 455 | } |
1ab3bf1b JG |
456 | } |
457 | ||
cba0d141 | 458 | |
0eb22669 | 459 | /* Free all the object files at once and clean up their users. */ |
cba0d141 JG |
460 | |
461 | void | |
462 | free_all_objfiles () | |
463 | { | |
464 | struct objfile *objfile, *temp; | |
465 | ||
466 | ALL_OBJFILES_SAFE (objfile, temp) | |
467 | { | |
468 | free_objfile (objfile); | |
469 | } | |
0eb22669 | 470 | clear_symtab_users (); |
cba0d141 | 471 | } |
3c02636b JK |
472 | \f |
473 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
474 | entries in new_offsets. */ | |
475 | void | |
476 | objfile_relocate (objfile, new_offsets) | |
477 | struct objfile *objfile; | |
478 | struct section_offsets *new_offsets; | |
479 | { | |
b9580b81 MS |
480 | struct section_offsets *delta = (struct section_offsets *) |
481 | alloca (sizeof (struct section_offsets) | |
482 | + objfile->num_sections * sizeof (delta->offsets)); | |
3c02636b JK |
483 | |
484 | { | |
485 | int i; | |
486 | int something_changed = 0; | |
487 | for (i = 0; i < objfile->num_sections; ++i) | |
488 | { | |
489 | ANOFFSET (delta, i) = | |
490 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); | |
491 | if (ANOFFSET (delta, i) != 0) | |
492 | something_changed = 1; | |
493 | } | |
494 | if (!something_changed) | |
495 | return; | |
496 | } | |
497 | ||
498 | /* OK, get all the symtabs. */ | |
499 | { | |
500 | struct symtab *s; | |
501 | ||
72bba93b | 502 | ALL_OBJFILE_SYMTABS (objfile, s) |
3c02636b JK |
503 | { |
504 | struct linetable *l; | |
505 | struct blockvector *bv; | |
506 | int i; | |
507 | ||
508 | /* First the line table. */ | |
509 | l = LINETABLE (s); | |
510 | if (l) | |
511 | { | |
512 | for (i = 0; i < l->nitems; ++i) | |
513 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
514 | } | |
515 | ||
516 | /* Don't relocate a shared blockvector more than once. */ | |
517 | if (!s->primary) | |
518 | continue; | |
519 | ||
520 | bv = BLOCKVECTOR (s); | |
521 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) | |
522 | { | |
523 | struct block *b; | |
524 | int j; | |
525 | ||
526 | b = BLOCKVECTOR_BLOCK (bv, i); | |
527 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
b9580b81 | 528 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); |
3c02636b JK |
529 | |
530 | for (j = 0; j < BLOCK_NSYMS (b); ++j) | |
531 | { | |
532 | struct symbol *sym = BLOCK_SYM (b, j); | |
533 | /* The RS6000 code from which this was taken skipped | |
534 | any symbols in STRUCT_NAMESPACE or UNDEF_NAMESPACE. | |
535 | But I'm leaving out that test, on the theory that | |
536 | they can't possibly pass the tests below. */ | |
537 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
538 | || SYMBOL_CLASS (sym) == LOC_STATIC) | |
539 | && SYMBOL_SECTION (sym) >= 0) | |
540 | { | |
b9580b81 | 541 | SYMBOL_VALUE_ADDRESS (sym) += |
3c02636b JK |
542 | ANOFFSET (delta, SYMBOL_SECTION (sym)); |
543 | } | |
72bba93b SG |
544 | #ifdef MIPS_EFI_SYMBOL_NAME |
545 | /* Relocate Extra Function Info for ecoff. */ | |
546 | ||
547 | else | |
548 | if (SYMBOL_CLASS (sym) == LOC_CONST | |
549 | && SYMBOL_NAMESPACE (sym) == LABEL_NAMESPACE | |
550 | && STRCMP (SYMBOL_NAME (sym), MIPS_EFI_SYMBOL_NAME) == 0) | |
b9580b81 MS |
551 | ecoff_relocate_efi (sym, ANOFFSET (delta, |
552 | s->block_line_section)); | |
72bba93b | 553 | #endif |
3c02636b JK |
554 | } |
555 | } | |
556 | } | |
557 | } | |
558 | ||
610a7e74 ILT |
559 | { |
560 | struct partial_symtab *p; | |
561 | ||
562 | ALL_OBJFILE_PSYMTABS (objfile, p) | |
563 | { | |
564 | p->textlow += ANOFFSET (delta, SECT_OFF_TEXT); | |
565 | p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT); | |
566 | } | |
567 | } | |
568 | ||
569 | { | |
2ad5709f | 570 | struct partial_symbol **psym; |
610a7e74 ILT |
571 | |
572 | for (psym = objfile->global_psymbols.list; | |
573 | psym < objfile->global_psymbols.next; | |
574 | psym++) | |
2ad5709f | 575 | if (SYMBOL_SECTION (*psym) >= 0) |
b9580b81 MS |
576 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, |
577 | SYMBOL_SECTION (*psym)); | |
610a7e74 ILT |
578 | for (psym = objfile->static_psymbols.list; |
579 | psym < objfile->static_psymbols.next; | |
580 | psym++) | |
2ad5709f | 581 | if (SYMBOL_SECTION (*psym) >= 0) |
b9580b81 MS |
582 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, |
583 | SYMBOL_SECTION (*psym)); | |
610a7e74 ILT |
584 | } |
585 | ||
3c02636b JK |
586 | { |
587 | struct minimal_symbol *msym; | |
588 | ALL_OBJFILE_MSYMBOLS (objfile, msym) | |
610a7e74 ILT |
589 | if (SYMBOL_SECTION (msym) >= 0) |
590 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); | |
3c02636b | 591 | } |
3a470454 JK |
592 | /* Relocating different sections by different amounts may cause the symbols |
593 | to be out of order. */ | |
594 | msymbols_sort (objfile); | |
3c02636b JK |
595 | |
596 | { | |
597 | int i; | |
598 | for (i = 0; i < objfile->num_sections; ++i) | |
599 | ANOFFSET (objfile->section_offsets, i) = ANOFFSET (new_offsets, i); | |
600 | } | |
72bba93b SG |
601 | |
602 | { | |
603 | struct obj_section *s; | |
604 | bfd *abfd; | |
605 | ||
3a470454 | 606 | abfd = objfile->obfd; |
72bba93b | 607 | |
3a470454 JK |
608 | for (s = objfile->sections; |
609 | s < objfile->sections_end; ++s) | |
72bba93b SG |
610 | { |
611 | flagword flags; | |
612 | ||
613 | flags = bfd_get_section_flags (abfd, s->the_bfd_section); | |
614 | ||
615 | if (flags & SEC_CODE) | |
616 | { | |
b9580b81 | 617 | s->addr += ANOFFSET (delta, SECT_OFF_TEXT); |
72bba93b SG |
618 | s->endaddr += ANOFFSET (delta, SECT_OFF_TEXT); |
619 | } | |
620 | else if (flags & (SEC_DATA | SEC_LOAD)) | |
621 | { | |
b9580b81 | 622 | s->addr += ANOFFSET (delta, SECT_OFF_DATA); |
72bba93b SG |
623 | s->endaddr += ANOFFSET (delta, SECT_OFF_DATA); |
624 | } | |
625 | else if (flags & SEC_ALLOC) | |
626 | { | |
b9580b81 | 627 | s->addr += ANOFFSET (delta, SECT_OFF_BSS); |
72bba93b SG |
628 | s->endaddr += ANOFFSET (delta, SECT_OFF_BSS); |
629 | } | |
630 | } | |
631 | } | |
a4b4f520 | 632 | |
40b647e9 | 633 | if (objfile->ei.entry_point != ~(CORE_ADDR)0) |
a4b4f520 SG |
634 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT); |
635 | ||
636 | if (objfile->ei.entry_func_lowpc != INVALID_ENTRY_LOWPC) | |
637 | { | |
b9580b81 | 638 | objfile->ei.entry_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); |
a4b4f520 SG |
639 | objfile->ei.entry_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT); |
640 | } | |
641 | ||
642 | if (objfile->ei.entry_file_lowpc != INVALID_ENTRY_LOWPC) | |
643 | { | |
b9580b81 | 644 | objfile->ei.entry_file_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); |
a4b4f520 SG |
645 | objfile->ei.entry_file_highpc += ANOFFSET (delta, SECT_OFF_TEXT); |
646 | } | |
647 | ||
648 | if (objfile->ei.main_func_lowpc != INVALID_ENTRY_LOWPC) | |
649 | { | |
b9580b81 | 650 | objfile->ei.main_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); |
a4b4f520 SG |
651 | objfile->ei.main_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT); |
652 | } | |
ee804cff FF |
653 | |
654 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
655 | breakpoint_re_set (); | |
3c02636b JK |
656 | } |
657 | \f | |
1ab3bf1b JG |
658 | /* Many places in gdb want to test just to see if we have any partial |
659 | symbols available. This function returns zero if none are currently | |
660 | available, nonzero otherwise. */ | |
661 | ||
662 | int | |
663 | have_partial_symbols () | |
664 | { | |
665 | struct objfile *ofp; | |
1ab3bf1b | 666 | |
84ffdec2 | 667 | ALL_OBJFILES (ofp) |
1ab3bf1b JG |
668 | { |
669 | if (ofp -> psymtabs != NULL) | |
670 | { | |
84ffdec2 | 671 | return 1; |
1ab3bf1b JG |
672 | } |
673 | } | |
84ffdec2 | 674 | return 0; |
1ab3bf1b JG |
675 | } |
676 | ||
677 | /* Many places in gdb want to test just to see if we have any full | |
678 | symbols available. This function returns zero if none are currently | |
679 | available, nonzero otherwise. */ | |
680 | ||
681 | int | |
682 | have_full_symbols () | |
683 | { | |
684 | struct objfile *ofp; | |
1ab3bf1b | 685 | |
84ffdec2 | 686 | ALL_OBJFILES (ofp) |
1ab3bf1b JG |
687 | { |
688 | if (ofp -> symtabs != NULL) | |
689 | { | |
84ffdec2 | 690 | return 1; |
1ab3bf1b JG |
691 | } |
692 | } | |
84ffdec2 | 693 | return 0; |
1ab3bf1b JG |
694 | } |
695 | ||
696 | /* Many places in gdb want to test just to see if we have any minimal | |
697 | symbols available. This function returns zero if none are currently | |
698 | available, nonzero otherwise. */ | |
699 | ||
700 | int | |
701 | have_minimal_symbols () | |
702 | { | |
703 | struct objfile *ofp; | |
1ab3bf1b | 704 | |
84ffdec2 | 705 | ALL_OBJFILES (ofp) |
1ab3bf1b JG |
706 | { |
707 | if (ofp -> msymbols != NULL) | |
708 | { | |
84ffdec2 | 709 | return 1; |
1ab3bf1b JG |
710 | } |
711 | } | |
84ffdec2 | 712 | return 0; |
1ab3bf1b JG |
713 | } |
714 | ||
0728afad | 715 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) |
1867b3be FF |
716 | |
717 | /* Given the name of a mapped symbol file in SYMSFILENAME, and the timestamp | |
718 | of the corresponding symbol file in MTIME, try to open an existing file | |
719 | with the name SYMSFILENAME and verify it is more recent than the base | |
720 | file by checking it's timestamp against MTIME. | |
721 | ||
722 | If SYMSFILENAME does not exist (or can't be stat'd), simply returns -1. | |
723 | ||
724 | If SYMSFILENAME does exist, but is out of date, we check to see if the | |
725 | user has specified creation of a mapped file. If so, we don't issue | |
726 | any warning message because we will be creating a new mapped file anyway, | |
727 | overwriting the old one. If not, then we issue a warning message so that | |
728 | the user will know why we aren't using this existing mapped symbol file. | |
729 | In either case, we return -1. | |
730 | ||
731 | If SYMSFILENAME does exist and is not out of date, but can't be opened for | |
732 | some reason, then prints an appropriate system error message and returns -1. | |
733 | ||
734 | Otherwise, returns the open file descriptor. */ | |
735 | ||
736 | static int | |
737 | open_existing_mapped_file (symsfilename, mtime, mapped) | |
738 | char *symsfilename; | |
739 | long mtime; | |
740 | int mapped; | |
741 | { | |
742 | int fd = -1; | |
743 | struct stat sbuf; | |
744 | ||
745 | if (stat (symsfilename, &sbuf) == 0) | |
746 | { | |
747 | if (sbuf.st_mtime < mtime) | |
748 | { | |
749 | if (!mapped) | |
750 | { | |
a679650f FF |
751 | warning ("mapped symbol file `%s' is out of date, ignored it", |
752 | symsfilename); | |
1867b3be FF |
753 | } |
754 | } | |
755 | else if ((fd = open (symsfilename, O_RDWR)) < 0) | |
756 | { | |
757 | if (error_pre_print) | |
758 | { | |
199b2450 | 759 | printf_unfiltered (error_pre_print); |
1867b3be FF |
760 | } |
761 | print_sys_errmsg (symsfilename, errno); | |
762 | } | |
763 | } | |
764 | return (fd); | |
765 | } | |
766 | ||
b0246b3b | 767 | /* Look for a mapped symbol file that corresponds to FILENAME and is more |
318bf84f | 768 | recent than MTIME. If MAPPED is nonzero, the user has asked that gdb |
b0246b3b FF |
769 | use a mapped symbol file for this file, so create a new one if one does |
770 | not currently exist. | |
318bf84f FF |
771 | |
772 | If found, then return an open file descriptor for the file, otherwise | |
773 | return -1. | |
774 | ||
775 | This routine is responsible for implementing the policy that generates | |
776 | the name of the mapped symbol file from the name of a file containing | |
1867b3be FF |
777 | symbols that gdb would like to read. Currently this policy is to append |
778 | ".syms" to the name of the file. | |
779 | ||
780 | This routine is also responsible for implementing the policy that | |
781 | determines where the mapped symbol file is found (the search path). | |
782 | This policy is that when reading an existing mapped file, a file of | |
783 | the correct name in the current directory takes precedence over a | |
784 | file of the correct name in the same directory as the symbol file. | |
785 | When creating a new mapped file, it is always created in the current | |
786 | directory. This helps to minimize the chances of a user unknowingly | |
787 | creating big mapped files in places like /bin and /usr/local/bin, and | |
788 | allows a local copy to override a manually installed global copy (in | |
789 | /bin for example). */ | |
318bf84f FF |
790 | |
791 | static int | |
b0246b3b FF |
792 | open_mapped_file (filename, mtime, mapped) |
793 | char *filename; | |
318bf84f FF |
794 | long mtime; |
795 | int mapped; | |
796 | { | |
797 | int fd; | |
1867b3be | 798 | char *symsfilename; |
318bf84f | 799 | |
1867b3be FF |
800 | /* First try to open an existing file in the current directory, and |
801 | then try the directory where the symbol file is located. */ | |
318bf84f | 802 | |
1867b3be FF |
803 | symsfilename = concat ("./", basename (filename), ".syms", (char *) NULL); |
804 | if ((fd = open_existing_mapped_file (symsfilename, mtime, mapped)) < 0) | |
318bf84f | 805 | { |
1867b3be FF |
806 | free (symsfilename); |
807 | symsfilename = concat (filename, ".syms", (char *) NULL); | |
808 | fd = open_existing_mapped_file (symsfilename, mtime, mapped); | |
318bf84f FF |
809 | } |
810 | ||
1867b3be FF |
811 | /* If we don't have an open file by now, then either the file does not |
812 | already exist, or the base file has changed since it was created. In | |
813 | either case, if the user has specified use of a mapped file, then | |
814 | create a new mapped file, truncating any existing one. If we can't | |
815 | create one, print a system error message saying why we can't. | |
318bf84f FF |
816 | |
817 | By default the file is rw for everyone, with the user's umask taking | |
818 | care of turning off the permissions the user wants off. */ | |
819 | ||
1867b3be | 820 | if ((fd < 0) && mapped) |
318bf84f | 821 | { |
1867b3be FF |
822 | free (symsfilename); |
823 | symsfilename = concat ("./", basename (filename), ".syms", | |
824 | (char *) NULL); | |
825 | if ((fd = open (symsfilename, O_RDWR | O_CREAT | O_TRUNC, 0666)) < 0) | |
826 | { | |
827 | if (error_pre_print) | |
828 | { | |
199b2450 | 829 | printf_unfiltered (error_pre_print); |
1867b3be FF |
830 | } |
831 | print_sys_errmsg (symsfilename, errno); | |
832 | } | |
318bf84f FF |
833 | } |
834 | ||
1867b3be | 835 | free (symsfilename); |
318bf84f FF |
836 | return (fd); |
837 | } | |
838 | ||
54109914 FF |
839 | static PTR |
840 | map_to_file (fd) | |
841 | int fd; | |
842 | { | |
843 | PTR md; | |
844 | CORE_ADDR mapto; | |
54109914 FF |
845 | |
846 | md = mmalloc_attach (fd, (PTR) 0); | |
847 | if (md != NULL) | |
848 | { | |
849 | mapto = (CORE_ADDR) mmalloc_getkey (md, 1); | |
850 | md = mmalloc_detach (md); | |
851 | if (md != NULL) | |
852 | { | |
853 | /* FIXME: should figure out why detach failed */ | |
854 | md = NULL; | |
855 | } | |
856 | else if (mapto != (CORE_ADDR) NULL) | |
857 | { | |
858 | /* This mapping file needs to be remapped at "mapto" */ | |
859 | md = mmalloc_attach (fd, (PTR) mapto); | |
860 | } | |
861 | else | |
862 | { | |
863 | /* This is a freshly created mapping file. */ | |
864 | mapto = (CORE_ADDR) mmalloc_findbase (20 * 1024 * 1024); | |
0a4d0a49 | 865 | if (mapto != 0) |
54109914 FF |
866 | { |
867 | /* To avoid reusing the freshly created mapping file, at the | |
868 | address selected by mmap, we must truncate it before trying | |
869 | to do an attach at the address we want. */ | |
870 | ftruncate (fd, 0); | |
871 | md = mmalloc_attach (fd, (PTR) mapto); | |
872 | if (md != NULL) | |
873 | { | |
874 | mmalloc_setkey (md, 1, (PTR) mapto); | |
875 | } | |
876 | } | |
877 | } | |
878 | } | |
879 | return (md); | |
880 | } | |
881 | ||
0728afad | 882 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
73d0fc78 | 883 | |
b9580b81 MS |
884 | /* Returns a section whose range includes PC and SECTION, |
885 | or NULL if none found. Note the distinction between the return type, | |
886 | struct obj_section (which is defined in gdb), and the input type | |
887 | struct sec (which is a bfd-defined data type). The obj_section | |
888 | contains a pointer to the bfd struct sec section. */ | |
73d0fc78 | 889 | |
4365c36c | 890 | struct obj_section * |
b9580b81 | 891 | find_pc_sect_section (pc, section) |
73d0fc78 | 892 | CORE_ADDR pc; |
b9580b81 | 893 | struct sec *section; |
73d0fc78 RP |
894 | { |
895 | struct obj_section *s; | |
896 | struct objfile *objfile; | |
897 | ||
898 | ALL_OBJFILES (objfile) | |
899 | for (s = objfile->sections; s < objfile->sections_end; ++s) | |
b9580b81 MS |
900 | if ((section == 0 || section == s->the_bfd_section) && |
901 | s->addr <= pc && pc < s->endaddr) | |
4365c36c | 902 | return(s); |
73d0fc78 RP |
903 | |
904 | return(NULL); | |
905 | } | |
38b90473 | 906 | |
b9580b81 MS |
907 | /* Returns a section whose range includes PC or NULL if none found. |
908 | Backward compatibility, no section. */ | |
909 | ||
910 | struct obj_section * | |
911 | find_pc_section(pc) | |
912 | CORE_ADDR pc; | |
913 | { | |
914 | return find_pc_sect_section (pc, find_pc_mapped_section (pc)); | |
915 | } | |
916 | ||
917 | ||
38b90473 PS |
918 | /* In SVR4, we recognize a trampoline by it's section name. |
919 | That is, if the pc is in a section named ".plt" then we are in | |
920 | a trampoline. */ | |
921 | ||
922 | int | |
923 | in_plt_section(pc, name) | |
924 | CORE_ADDR pc; | |
925 | char *name; | |
926 | { | |
927 | struct obj_section *s; | |
928 | int retval = 0; | |
929 | ||
930 | s = find_pc_section(pc); | |
931 | ||
932 | retval = (s != NULL | |
933 | && s->the_bfd_section->name != NULL | |
934 | && STREQ (s->the_bfd_section->name, ".plt")); | |
935 | return(retval); | |
936 | } |