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c906108c | 1 | /* GDB routines for manipulating objfiles. |
af5f3db6 AC |
2 | |
3 | Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, | |
2de7ced7 | 4 | 2001, 2002, 2003 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 | |
12 | the Free Software Foundation; either version 2 of the License, or | |
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 JM |
20 | You should have received a copy of the GNU General Public License |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
24 | |
25 | /* This file contains support routines for creating, manipulating, and | |
26 | destroying objfile structures. */ | |
27 | ||
28 | #include "defs.h" | |
29 | #include "bfd.h" /* Binary File Description */ | |
30 | #include "symtab.h" | |
31 | #include "symfile.h" | |
32 | #include "objfiles.h" | |
33 | #include "gdb-stabs.h" | |
34 | #include "target.h" | |
af5f3db6 | 35 | #include "bcache.h" |
c906108c | 36 | |
0d0e1a63 | 37 | #include "gdb_assert.h" |
c906108c SS |
38 | #include <sys/types.h> |
39 | #include "gdb_stat.h" | |
40 | #include <fcntl.h> | |
04ea0df1 | 41 | #include "gdb_obstack.h" |
c906108c | 42 | #include "gdb_string.h" |
2de7ced7 | 43 | #include "hashtab.h" |
c906108c | 44 | |
7a292a7a | 45 | #include "breakpoint.h" |
fe898f56 | 46 | #include "block.h" |
de4f826b | 47 | #include "dictionary.h" |
7a292a7a | 48 | |
c906108c SS |
49 | /* Prototypes for local functions */ |
50 | ||
51 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
52 | ||
ed1801df AC |
53 | #include "mmalloc.h" |
54 | ||
a14ed312 | 55 | static int open_existing_mapped_file (char *, long, int); |
c906108c | 56 | |
a14ed312 | 57 | static int open_mapped_file (char *filename, long mtime, int flags); |
c906108c | 58 | |
4efb68b1 | 59 | static void *map_to_file (int); |
c906108c | 60 | |
c5aa993b | 61 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c | 62 | |
0d0e1a63 MK |
63 | static void objfile_alloc_data (struct objfile *objfile); |
64 | static void objfile_free_data (struct objfile *objfile); | |
65 | ||
c906108c SS |
66 | /* Externally visible variables that are owned by this module. |
67 | See declarations in objfile.h for more info. */ | |
68 | ||
c5aa993b | 69 | struct objfile *object_files; /* Linked list of all objfiles */ |
c906108c SS |
70 | struct objfile *current_objfile; /* For symbol file being read in */ |
71 | struct objfile *symfile_objfile; /* Main symbol table loaded from */ | |
72 | struct objfile *rt_common_objfile; /* For runtime common symbols */ | |
73 | ||
c5aa993b | 74 | int mapped_symbol_files; /* Try to use mapped symbol files */ |
c906108c SS |
75 | |
76 | /* Locate all mappable sections of a BFD file. | |
77 | objfile_p_char is a char * to get it through | |
78 | bfd_map_over_sections; we cast it back to its proper type. */ | |
79 | ||
80 | #ifndef TARGET_KEEP_SECTION | |
81 | #define TARGET_KEEP_SECTION(ASECT) 0 | |
82 | #endif | |
83 | ||
96baa820 JM |
84 | /* Called via bfd_map_over_sections to build up the section table that |
85 | the objfile references. The objfile contains pointers to the start | |
86 | of the table (objfile->sections) and to the first location after | |
87 | the end of the table (objfile->sections_end). */ | |
88 | ||
c906108c | 89 | static void |
7be0c536 AC |
90 | add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
91 | void *objfile_p_char) | |
c906108c SS |
92 | { |
93 | struct objfile *objfile = (struct objfile *) objfile_p_char; | |
94 | struct obj_section section; | |
95 | flagword aflag; | |
96 | ||
97 | aflag = bfd_get_section_flags (abfd, asect); | |
98 | ||
c5aa993b | 99 | if (!(aflag & SEC_ALLOC) && !(TARGET_KEEP_SECTION (asect))) |
c906108c SS |
100 | return; |
101 | ||
102 | if (0 == bfd_section_size (abfd, asect)) | |
103 | return; | |
104 | section.offset = 0; | |
105 | section.objfile = objfile; | |
106 | section.the_bfd_section = asect; | |
107 | section.ovly_mapped = 0; | |
108 | section.addr = bfd_section_vma (abfd, asect); | |
109 | section.endaddr = section.addr + bfd_section_size (abfd, asect); | |
c5aa993b | 110 | obstack_grow (&objfile->psymbol_obstack, (char *) §ion, sizeof (section)); |
c906108c SS |
111 | objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1); |
112 | } | |
113 | ||
114 | /* Builds a section table for OBJFILE. | |
115 | Returns 0 if OK, 1 on error (in which case bfd_error contains the | |
96baa820 JM |
116 | error). |
117 | ||
118 | Note that while we are building the table, which goes into the | |
119 | psymbol obstack, we hijack the sections_end pointer to instead hold | |
120 | a count of the number of sections. When bfd_map_over_sections | |
121 | returns, this count is used to compute the pointer to the end of | |
122 | the sections table, which then overwrites the count. | |
123 | ||
124 | Also note that the OFFSET and OVLY_MAPPED in each table entry | |
125 | are initialized to zero. | |
126 | ||
127 | Also note that if anything else writes to the psymbol obstack while | |
128 | we are building the table, we're pretty much hosed. */ | |
c906108c SS |
129 | |
130 | int | |
fba45db2 | 131 | build_objfile_section_table (struct objfile *objfile) |
c906108c SS |
132 | { |
133 | /* objfile->sections can be already set when reading a mapped symbol | |
134 | file. I believe that we do need to rebuild the section table in | |
135 | this case (we rebuild other things derived from the bfd), but we | |
136 | can't free the old one (it's in the psymbol_obstack). So we just | |
137 | waste some memory. */ | |
138 | ||
139 | objfile->sections_end = 0; | |
c5aa993b | 140 | bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *) objfile); |
c906108c SS |
141 | objfile->sections = (struct obj_section *) |
142 | obstack_finish (&objfile->psymbol_obstack); | |
143 | objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end; | |
c5aa993b | 144 | return (0); |
c906108c SS |
145 | } |
146 | ||
2df3850c JM |
147 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits |
148 | allocate a new objfile struct, fill it in as best we can, link it | |
149 | into the list of all known objfiles, and return a pointer to the | |
150 | new objfile struct. | |
c906108c | 151 | |
2df3850c JM |
152 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
153 | requests for specific operations, like trying to open a mapped | |
154 | version of the objfile (OBJF_MAPPED). Other bits like | |
155 | OBJF_SHARED are simply copied through to the new objfile flags | |
156 | member. */ | |
c906108c | 157 | |
eb9a305d DC |
158 | /* NOTE: carlton/2003-02-04: This function is called with args NULL, 0 |
159 | by jv-lang.c, to create an artificial objfile used to hold | |
160 | information about dynamically-loaded Java classes. Unfortunately, | |
161 | that branch of this function doesn't get tested very frequently, so | |
162 | it's prone to breakage. (E.g. at one time the name was set to NULL | |
163 | in that situation, which broke a loop over all names in the dynamic | |
164 | library loader.) If you change this function, please try to leave | |
165 | things in a consistent state even if abfd is NULL. */ | |
166 | ||
c906108c | 167 | struct objfile * |
fba45db2 | 168 | allocate_objfile (bfd *abfd, int flags) |
c906108c SS |
169 | { |
170 | struct objfile *objfile = NULL; | |
171 | struct objfile *last_one = NULL; | |
172 | ||
2df3850c JM |
173 | if (mapped_symbol_files) |
174 | flags |= OBJF_MAPPED; | |
c906108c SS |
175 | |
176 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
177 | if (abfd != NULL) | |
c5aa993b | 178 | { |
c906108c | 179 | |
c5aa993b JM |
180 | /* If we can support mapped symbol files, try to open/reopen the |
181 | mapped file that corresponds to the file from which we wish to | |
182 | read symbols. If the objfile is to be mapped, we must malloc | |
183 | the structure itself using the mmap version, and arrange that | |
184 | all memory allocation for the objfile uses the mmap routines. | |
185 | If we are reusing an existing mapped file, from which we get | |
186 | our objfile pointer, we have to make sure that we update the | |
187 | pointers to the alloc/free functions in the obstack, in case | |
188 | these functions have moved within the current gdb. */ | |
189 | ||
190 | int fd; | |
191 | ||
192 | fd = open_mapped_file (bfd_get_filename (abfd), bfd_get_mtime (abfd), | |
2df3850c | 193 | flags); |
c5aa993b JM |
194 | if (fd >= 0) |
195 | { | |
4efb68b1 | 196 | void *md; |
c906108c | 197 | |
c5aa993b JM |
198 | if ((md = map_to_file (fd)) == NULL) |
199 | { | |
200 | close (fd); | |
201 | } | |
202 | else if ((objfile = (struct objfile *) mmalloc_getkey (md, 0)) != NULL) | |
203 | { | |
204 | /* Update memory corruption handler function addresses. */ | |
205 | init_malloc (md); | |
206 | objfile->md = md; | |
207 | objfile->mmfd = fd; | |
208 | /* Update pointers to functions to *our* copies */ | |
2de7ced7 DJ |
209 | if (objfile->demangled_names_hash) |
210 | htab_set_functions_ex | |
211 | (objfile->demangled_names_hash, htab_hash_string, | |
212 | (int (*) (const void *, const void *)) streq, NULL, | |
213 | objfile->md, xmcalloc, xmfree); | |
c5aa993b | 214 | obstack_chunkfun (&objfile->psymbol_cache.cache, xmmalloc); |
aac7f4ea | 215 | obstack_freefun (&objfile->psymbol_cache.cache, xmfree); |
99d9066e JB |
216 | obstack_chunkfun (&objfile->macro_cache.cache, xmmalloc); |
217 | obstack_freefun (&objfile->macro_cache.cache, xmfree); | |
c5aa993b | 218 | obstack_chunkfun (&objfile->psymbol_obstack, xmmalloc); |
aac7f4ea | 219 | obstack_freefun (&objfile->psymbol_obstack, xmfree); |
c5aa993b | 220 | obstack_chunkfun (&objfile->symbol_obstack, xmmalloc); |
aac7f4ea | 221 | obstack_freefun (&objfile->symbol_obstack, xmfree); |
c5aa993b | 222 | obstack_chunkfun (&objfile->type_obstack, xmmalloc); |
aac7f4ea | 223 | obstack_freefun (&objfile->type_obstack, xmfree); |
c5aa993b JM |
224 | /* If already in objfile list, unlink it. */ |
225 | unlink_objfile (objfile); | |
226 | /* Forget things specific to a particular gdb, may have changed. */ | |
227 | objfile->sf = NULL; | |
228 | } | |
229 | else | |
230 | { | |
c906108c | 231 | |
c5aa993b JM |
232 | /* Set up to detect internal memory corruption. MUST be |
233 | done before the first malloc. See comments in | |
234 | init_malloc() and mmcheck(). */ | |
235 | ||
236 | init_malloc (md); | |
237 | ||
238 | objfile = (struct objfile *) | |
239 | xmmalloc (md, sizeof (struct objfile)); | |
240 | memset (objfile, 0, sizeof (struct objfile)); | |
241 | objfile->md = md; | |
242 | objfile->mmfd = fd; | |
243 | objfile->flags |= OBJF_MAPPED; | |
244 | mmalloc_setkey (objfile->md, 0, objfile); | |
245 | obstack_specify_allocation_with_arg (&objfile->psymbol_cache.cache, | |
aac7f4ea | 246 | 0, 0, xmmalloc, xmfree, |
c5aa993b | 247 | objfile->md); |
99d9066e JB |
248 | obstack_specify_allocation_with_arg (&objfile->macro_cache.cache, |
249 | 0, 0, xmmalloc, xmfree, | |
250 | objfile->md); | |
c5aa993b | 251 | obstack_specify_allocation_with_arg (&objfile->psymbol_obstack, |
aac7f4ea | 252 | 0, 0, xmmalloc, xmfree, |
c5aa993b JM |
253 | objfile->md); |
254 | obstack_specify_allocation_with_arg (&objfile->symbol_obstack, | |
aac7f4ea | 255 | 0, 0, xmmalloc, xmfree, |
c5aa993b JM |
256 | objfile->md); |
257 | obstack_specify_allocation_with_arg (&objfile->type_obstack, | |
aac7f4ea | 258 | 0, 0, xmmalloc, xmfree, |
c5aa993b JM |
259 | objfile->md); |
260 | } | |
261 | } | |
c906108c | 262 | |
2df3850c | 263 | if ((flags & OBJF_MAPPED) && (objfile == NULL)) |
c5aa993b JM |
264 | { |
265 | warning ("symbol table for '%s' will not be mapped", | |
266 | bfd_get_filename (abfd)); | |
2df3850c | 267 | flags &= ~OBJF_MAPPED; |
c5aa993b JM |
268 | } |
269 | } | |
270 | #else /* !defined(USE_MMALLOC) || !defined(HAVE_MMAP) */ | |
c906108c | 271 | |
2df3850c | 272 | if (flags & OBJF_MAPPED) |
c906108c SS |
273 | { |
274 | warning ("mapped symbol tables are not supported on this machine; missing or broken mmap()."); | |
275 | ||
276 | /* Turn off the global flag so we don't try to do mapped symbol tables | |
c5aa993b JM |
277 | any more, which shuts up gdb unless the user specifically gives the |
278 | "mapped" keyword again. */ | |
c906108c SS |
279 | |
280 | mapped_symbol_files = 0; | |
2df3850c | 281 | flags &= ~OBJF_MAPPED; |
c906108c SS |
282 | } |
283 | ||
c5aa993b | 284 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c SS |
285 | |
286 | /* If we don't support mapped symbol files, didn't ask for the file to be | |
287 | mapped, or failed to open the mapped file for some reason, then revert | |
288 | back to an unmapped objfile. */ | |
289 | ||
290 | if (objfile == NULL) | |
291 | { | |
292 | objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); | |
293 | memset (objfile, 0, sizeof (struct objfile)); | |
c5aa993b | 294 | objfile->md = NULL; |
af5f3db6 AC |
295 | objfile->psymbol_cache = bcache_xmalloc (); |
296 | objfile->macro_cache = bcache_xmalloc (); | |
c5aa993b | 297 | obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, xmalloc, |
b8c9b27d | 298 | xfree); |
c5aa993b | 299 | obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, xmalloc, |
b8c9b27d | 300 | xfree); |
c5aa993b | 301 | obstack_specify_allocation (&objfile->type_obstack, 0, 0, xmalloc, |
b8c9b27d | 302 | xfree); |
2df3850c | 303 | flags &= ~OBJF_MAPPED; |
15831452 JB |
304 | |
305 | terminate_minimal_symbol_table (objfile); | |
c906108c SS |
306 | } |
307 | ||
0d0e1a63 MK |
308 | objfile_alloc_data (objfile); |
309 | ||
c906108c SS |
310 | /* Update the per-objfile information that comes from the bfd, ensuring |
311 | that any data that is reference is saved in the per-objfile data | |
312 | region. */ | |
313 | ||
c5aa993b JM |
314 | objfile->obfd = abfd; |
315 | if (objfile->name != NULL) | |
c906108c | 316 | { |
aac7f4ea | 317 | xmfree (objfile->md, objfile->name); |
c906108c SS |
318 | } |
319 | if (abfd != NULL) | |
320 | { | |
c5aa993b JM |
321 | objfile->name = mstrsave (objfile->md, bfd_get_filename (abfd)); |
322 | objfile->mtime = bfd_get_mtime (abfd); | |
c906108c SS |
323 | |
324 | /* Build section table. */ | |
325 | ||
326 | if (build_objfile_section_table (objfile)) | |
327 | { | |
c5aa993b JM |
328 | error ("Can't find the file sections in `%s': %s", |
329 | objfile->name, bfd_errmsg (bfd_get_error ())); | |
c906108c SS |
330 | } |
331 | } | |
eb9a305d DC |
332 | else |
333 | { | |
a9c0dc7f | 334 | objfile->name = mstrsave (objfile->md, "<<anonymous objfile>>"); |
eb9a305d | 335 | } |
c906108c | 336 | |
b8fbeb18 EZ |
337 | /* Initialize the section indexes for this objfile, so that we can |
338 | later detect if they are used w/o being properly assigned to. */ | |
339 | ||
5c4e30ca DC |
340 | objfile->sect_index_text = -1; |
341 | objfile->sect_index_data = -1; | |
342 | objfile->sect_index_bss = -1; | |
343 | objfile->sect_index_rodata = -1; | |
344 | ||
345 | /* We don't yet have a C++-specific namespace symtab. */ | |
346 | ||
347 | objfile->cp_namespace_symtab = NULL; | |
b8fbeb18 | 348 | |
c906108c SS |
349 | /* Add this file onto the tail of the linked list of other such files. */ |
350 | ||
c5aa993b | 351 | objfile->next = NULL; |
c906108c SS |
352 | if (object_files == NULL) |
353 | object_files = objfile; | |
354 | else | |
355 | { | |
356 | for (last_one = object_files; | |
c5aa993b JM |
357 | last_one->next; |
358 | last_one = last_one->next); | |
359 | last_one->next = objfile; | |
c906108c SS |
360 | } |
361 | ||
2df3850c JM |
362 | /* Save passed in flag bits. */ |
363 | objfile->flags |= flags; | |
c906108c SS |
364 | |
365 | return (objfile); | |
366 | } | |
367 | ||
15831452 JB |
368 | |
369 | /* Create the terminating entry of OBJFILE's minimal symbol table. | |
370 | If OBJFILE->msymbols is zero, allocate a single entry from | |
371 | OBJFILE->symbol_obstack; otherwise, just initialize | |
372 | OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */ | |
373 | void | |
374 | terminate_minimal_symbol_table (struct objfile *objfile) | |
375 | { | |
376 | if (! objfile->msymbols) | |
377 | objfile->msymbols = ((struct minimal_symbol *) | |
378 | obstack_alloc (&objfile->symbol_obstack, | |
379 | sizeof (objfile->msymbols[0]))); | |
380 | ||
381 | { | |
382 | struct minimal_symbol *m | |
383 | = &objfile->msymbols[objfile->minimal_symbol_count]; | |
384 | ||
385 | memset (m, 0, sizeof (*m)); | |
22abf04a | 386 | DEPRECATED_SYMBOL_NAME (m) = NULL; |
15831452 JB |
387 | SYMBOL_VALUE_ADDRESS (m) = 0; |
388 | MSYMBOL_INFO (m) = NULL; | |
389 | MSYMBOL_TYPE (m) = mst_unknown; | |
390 | SYMBOL_INIT_LANGUAGE_SPECIFIC (m, language_unknown); | |
391 | } | |
392 | } | |
393 | ||
394 | ||
5b5d99cf JB |
395 | /* Put one object file before a specified on in the global list. |
396 | This can be used to make sure an object file is destroyed before | |
397 | another when using ALL_OBJFILES_SAFE to free all objfiles. */ | |
398 | void | |
399 | put_objfile_before (struct objfile *objfile, struct objfile *before_this) | |
400 | { | |
401 | struct objfile **objp; | |
402 | ||
403 | unlink_objfile (objfile); | |
404 | ||
405 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
406 | { | |
407 | if (*objp == before_this) | |
408 | { | |
409 | objfile->next = *objp; | |
410 | *objp = objfile; | |
411 | return; | |
412 | } | |
413 | } | |
414 | ||
415 | internal_error (__FILE__, __LINE__, | |
416 | "put_objfile_before: before objfile not in list"); | |
417 | } | |
418 | ||
c906108c SS |
419 | /* Put OBJFILE at the front of the list. */ |
420 | ||
421 | void | |
fba45db2 | 422 | objfile_to_front (struct objfile *objfile) |
c906108c SS |
423 | { |
424 | struct objfile **objp; | |
425 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
426 | { | |
427 | if (*objp == objfile) | |
428 | { | |
429 | /* Unhook it from where it is. */ | |
430 | *objp = objfile->next; | |
431 | /* Put it in the front. */ | |
432 | objfile->next = object_files; | |
433 | object_files = objfile; | |
434 | break; | |
435 | } | |
436 | } | |
437 | } | |
438 | ||
439 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the | |
440 | list. | |
441 | ||
442 | It is not a bug, or error, to call this function if OBJFILE is not known | |
443 | to be in the current list. This is done in the case of mapped objfiles, | |
444 | for example, just to ensure that the mapped objfile doesn't appear twice | |
445 | in the list. Since the list is threaded, linking in a mapped objfile | |
446 | twice would create a circular list. | |
447 | ||
448 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
449 | unlinking it, just to ensure that we have completely severed any linkages | |
450 | between the OBJFILE and the list. */ | |
451 | ||
452 | void | |
fba45db2 | 453 | unlink_objfile (struct objfile *objfile) |
c906108c | 454 | { |
c5aa993b | 455 | struct objfile **objpp; |
c906108c | 456 | |
c5aa993b | 457 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
c906108c | 458 | { |
c5aa993b | 459 | if (*objpp == objfile) |
c906108c | 460 | { |
c5aa993b JM |
461 | *objpp = (*objpp)->next; |
462 | objfile->next = NULL; | |
07cd4b97 | 463 | return; |
c906108c SS |
464 | } |
465 | } | |
07cd4b97 | 466 | |
8e65ff28 AC |
467 | internal_error (__FILE__, __LINE__, |
468 | "unlink_objfile: objfile already unlinked"); | |
c906108c SS |
469 | } |
470 | ||
471 | ||
472 | /* Destroy an objfile and all the symtabs and psymtabs under it. Note | |
473 | that as much as possible is allocated on the symbol_obstack and | |
474 | psymbol_obstack, so that the memory can be efficiently freed. | |
475 | ||
476 | Things which we do NOT free because they are not in malloc'd memory | |
477 | or not in memory specific to the objfile include: | |
478 | ||
c5aa993b | 479 | objfile -> sf |
c906108c SS |
480 | |
481 | FIXME: If the objfile is using reusable symbol information (via mmalloc), | |
482 | then we need to take into account the fact that more than one process | |
483 | may be using the symbol information at the same time (when mmalloc is | |
484 | extended to support cooperative locking). When more than one process | |
485 | is using the mapped symbol info, we need to be more careful about when | |
486 | we free objects in the reusable area. */ | |
487 | ||
488 | void | |
fba45db2 | 489 | free_objfile (struct objfile *objfile) |
c906108c | 490 | { |
5b5d99cf JB |
491 | if (objfile->separate_debug_objfile) |
492 | { | |
493 | free_objfile (objfile->separate_debug_objfile); | |
494 | } | |
495 | ||
496 | if (objfile->separate_debug_objfile_backlink) | |
497 | { | |
498 | /* We freed the separate debug file, make sure the base objfile | |
499 | doesn't reference it. */ | |
500 | objfile->separate_debug_objfile_backlink->separate_debug_objfile = NULL; | |
501 | } | |
502 | ||
c906108c SS |
503 | /* First do any symbol file specific actions required when we are |
504 | finished with a particular symbol file. Note that if the objfile | |
505 | is using reusable symbol information (via mmalloc) then each of | |
506 | these routines is responsible for doing the correct thing, either | |
507 | freeing things which are valid only during this particular gdb | |
508 | execution, or leaving them to be reused during the next one. */ | |
509 | ||
c5aa993b | 510 | if (objfile->sf != NULL) |
c906108c | 511 | { |
c5aa993b | 512 | (*objfile->sf->sym_finish) (objfile); |
c906108c SS |
513 | } |
514 | ||
515 | /* We always close the bfd. */ | |
516 | ||
c5aa993b | 517 | if (objfile->obfd != NULL) |
c906108c SS |
518 | { |
519 | char *name = bfd_get_filename (objfile->obfd); | |
c5aa993b | 520 | if (!bfd_close (objfile->obfd)) |
c906108c SS |
521 | warning ("cannot close \"%s\": %s", |
522 | name, bfd_errmsg (bfd_get_error ())); | |
b8c9b27d | 523 | xfree (name); |
c906108c SS |
524 | } |
525 | ||
526 | /* Remove it from the chain of all objfiles. */ | |
527 | ||
528 | unlink_objfile (objfile); | |
529 | ||
530 | /* If we are going to free the runtime common objfile, mark it | |
531 | as unallocated. */ | |
532 | ||
533 | if (objfile == rt_common_objfile) | |
534 | rt_common_objfile = NULL; | |
535 | ||
536 | /* Before the symbol table code was redone to make it easier to | |
537 | selectively load and remove information particular to a specific | |
538 | linkage unit, gdb used to do these things whenever the monolithic | |
539 | symbol table was blown away. How much still needs to be done | |
540 | is unknown, but we play it safe for now and keep each action until | |
541 | it is shown to be no longer needed. */ | |
c5aa993b | 542 | |
c906108c SS |
543 | /* I *think* all our callers call clear_symtab_users. If so, no need |
544 | to call this here. */ | |
545 | clear_pc_function_cache (); | |
546 | ||
547 | /* The last thing we do is free the objfile struct itself for the | |
aac7f4ea AC |
548 | non-reusable case, or detach from the mapped file for the |
549 | reusable case. Note that the mmalloc_detach or the xmfree() is | |
550 | the last thing we can do with this objfile. */ | |
c906108c SS |
551 | |
552 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
553 | ||
c5aa993b | 554 | if (objfile->flags & OBJF_MAPPED) |
c906108c SS |
555 | { |
556 | /* Remember the fd so we can close it. We can't close it before | |
c5aa993b | 557 | doing the detach, and after the detach the objfile is gone. */ |
c906108c SS |
558 | int mmfd; |
559 | ||
c5aa993b JM |
560 | mmfd = objfile->mmfd; |
561 | mmalloc_detach (objfile->md); | |
c906108c SS |
562 | objfile = NULL; |
563 | close (mmfd); | |
564 | } | |
565 | ||
c5aa993b | 566 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c SS |
567 | |
568 | /* If we still have an objfile, then either we don't support reusable | |
569 | objfiles or this one was not reusable. So free it normally. */ | |
570 | ||
571 | if (objfile != NULL) | |
572 | { | |
0d0e1a63 | 573 | objfile_free_data (objfile); |
c5aa993b | 574 | if (objfile->name != NULL) |
c906108c | 575 | { |
aac7f4ea | 576 | xmfree (objfile->md, objfile->name); |
c906108c SS |
577 | } |
578 | if (objfile->global_psymbols.list) | |
aac7f4ea | 579 | xmfree (objfile->md, objfile->global_psymbols.list); |
c906108c | 580 | if (objfile->static_psymbols.list) |
aac7f4ea | 581 | xmfree (objfile->md, objfile->static_psymbols.list); |
c906108c | 582 | /* Free the obstacks for non-reusable objfiles */ |
af5f3db6 AC |
583 | bcache_xfree (objfile->psymbol_cache); |
584 | bcache_xfree (objfile->macro_cache); | |
2de7ced7 DJ |
585 | if (objfile->demangled_names_hash) |
586 | htab_delete (objfile->demangled_names_hash); | |
c5aa993b JM |
587 | obstack_free (&objfile->psymbol_obstack, 0); |
588 | obstack_free (&objfile->symbol_obstack, 0); | |
589 | obstack_free (&objfile->type_obstack, 0); | |
aac7f4ea | 590 | xmfree (objfile->md, objfile); |
c906108c SS |
591 | objfile = NULL; |
592 | } | |
593 | } | |
594 | ||
74b7792f AC |
595 | static void |
596 | do_free_objfile_cleanup (void *obj) | |
597 | { | |
598 | free_objfile (obj); | |
599 | } | |
600 | ||
601 | struct cleanup * | |
602 | make_cleanup_free_objfile (struct objfile *obj) | |
603 | { | |
604 | return make_cleanup (do_free_objfile_cleanup, obj); | |
605 | } | |
c906108c SS |
606 | |
607 | /* Free all the object files at once and clean up their users. */ | |
608 | ||
609 | void | |
fba45db2 | 610 | free_all_objfiles (void) |
c906108c SS |
611 | { |
612 | struct objfile *objfile, *temp; | |
613 | ||
614 | ALL_OBJFILES_SAFE (objfile, temp) | |
c5aa993b JM |
615 | { |
616 | free_objfile (objfile); | |
617 | } | |
c906108c SS |
618 | clear_symtab_users (); |
619 | } | |
620 | \f | |
621 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
622 | entries in new_offsets. */ | |
623 | void | |
fba45db2 | 624 | objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets) |
c906108c | 625 | { |
d4f3574e | 626 | struct section_offsets *delta = |
a39a16c4 MM |
627 | ((struct section_offsets *) |
628 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
c906108c SS |
629 | |
630 | { | |
631 | int i; | |
632 | int something_changed = 0; | |
633 | for (i = 0; i < objfile->num_sections; ++i) | |
634 | { | |
a4c8257b | 635 | delta->offsets[i] = |
c906108c SS |
636 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); |
637 | if (ANOFFSET (delta, i) != 0) | |
638 | something_changed = 1; | |
639 | } | |
640 | if (!something_changed) | |
641 | return; | |
642 | } | |
643 | ||
644 | /* OK, get all the symtabs. */ | |
645 | { | |
646 | struct symtab *s; | |
647 | ||
648 | ALL_OBJFILE_SYMTABS (objfile, s) | |
c5aa993b JM |
649 | { |
650 | struct linetable *l; | |
651 | struct blockvector *bv; | |
652 | int i; | |
653 | ||
654 | /* First the line table. */ | |
655 | l = LINETABLE (s); | |
656 | if (l) | |
657 | { | |
658 | for (i = 0; i < l->nitems; ++i) | |
659 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
660 | } | |
c906108c | 661 | |
c5aa993b JM |
662 | /* Don't relocate a shared blockvector more than once. */ |
663 | if (!s->primary) | |
664 | continue; | |
c906108c | 665 | |
c5aa993b JM |
666 | bv = BLOCKVECTOR (s); |
667 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) | |
668 | { | |
669 | struct block *b; | |
e88c90f2 | 670 | struct symbol *sym; |
de4f826b | 671 | struct dict_iterator iter; |
c5aa993b JM |
672 | |
673 | b = BLOCKVECTOR_BLOCK (bv, i); | |
674 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
675 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
676 | ||
de4f826b | 677 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
c5aa993b | 678 | { |
7a78d0ee KB |
679 | fixup_symbol_section (sym, objfile); |
680 | ||
c5aa993b | 681 | /* The RS6000 code from which this was taken skipped |
176620f1 | 682 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. |
c5aa993b JM |
683 | But I'm leaving out that test, on the theory that |
684 | they can't possibly pass the tests below. */ | |
685 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
686 | || SYMBOL_CLASS (sym) == LOC_STATIC | |
687 | || SYMBOL_CLASS (sym) == LOC_INDIRECT) | |
688 | && SYMBOL_SECTION (sym) >= 0) | |
689 | { | |
690 | SYMBOL_VALUE_ADDRESS (sym) += | |
691 | ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
692 | } | |
c906108c | 693 | #ifdef MIPS_EFI_SYMBOL_NAME |
c5aa993b | 694 | /* Relocate Extra Function Info for ecoff. */ |
c906108c | 695 | |
c5aa993b | 696 | else if (SYMBOL_CLASS (sym) == LOC_CONST |
176620f1 | 697 | && SYMBOL_DOMAIN (sym) == LABEL_DOMAIN |
22abf04a | 698 | && strcmp (DEPRECATED_SYMBOL_NAME (sym), MIPS_EFI_SYMBOL_NAME) == 0) |
c5aa993b | 699 | ecoff_relocate_efi (sym, ANOFFSET (delta, |
c906108c SS |
700 | s->block_line_section)); |
701 | #endif | |
c5aa993b JM |
702 | } |
703 | } | |
704 | } | |
c906108c SS |
705 | } |
706 | ||
707 | { | |
708 | struct partial_symtab *p; | |
709 | ||
710 | ALL_OBJFILE_PSYMTABS (objfile, p) | |
c5aa993b | 711 | { |
b8fbeb18 EZ |
712 | p->textlow += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
713 | p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
c5aa993b | 714 | } |
c906108c SS |
715 | } |
716 | ||
717 | { | |
718 | struct partial_symbol **psym; | |
719 | ||
720 | for (psym = objfile->global_psymbols.list; | |
721 | psym < objfile->global_psymbols.next; | |
722 | psym++) | |
7a78d0ee KB |
723 | { |
724 | fixup_psymbol_section (*psym, objfile); | |
725 | if (SYMBOL_SECTION (*psym) >= 0) | |
726 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, | |
727 | SYMBOL_SECTION (*psym)); | |
728 | } | |
c906108c SS |
729 | for (psym = objfile->static_psymbols.list; |
730 | psym < objfile->static_psymbols.next; | |
731 | psym++) | |
7a78d0ee KB |
732 | { |
733 | fixup_psymbol_section (*psym, objfile); | |
734 | if (SYMBOL_SECTION (*psym) >= 0) | |
735 | SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, | |
736 | SYMBOL_SECTION (*psym)); | |
737 | } | |
c906108c SS |
738 | } |
739 | ||
740 | { | |
741 | struct minimal_symbol *msym; | |
742 | ALL_OBJFILE_MSYMBOLS (objfile, msym) | |
743 | if (SYMBOL_SECTION (msym) >= 0) | |
c5aa993b | 744 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); |
c906108c SS |
745 | } |
746 | /* Relocating different sections by different amounts may cause the symbols | |
747 | to be out of order. */ | |
748 | msymbols_sort (objfile); | |
749 | ||
750 | { | |
751 | int i; | |
752 | for (i = 0; i < objfile->num_sections; ++i) | |
a4c8257b | 753 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); |
c906108c SS |
754 | } |
755 | ||
36b0c0e0 PS |
756 | if (objfile->ei.entry_point != ~(CORE_ADDR) 0) |
757 | { | |
758 | /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT | |
759 | only as a fallback. */ | |
760 | struct obj_section *s; | |
761 | s = find_pc_section (objfile->ei.entry_point); | |
762 | if (s) | |
763 | objfile->ei.entry_point += ANOFFSET (delta, s->the_bfd_section->index); | |
764 | else | |
765 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
766 | } | |
767 | ||
c906108c SS |
768 | { |
769 | struct obj_section *s; | |
770 | bfd *abfd; | |
771 | ||
772 | abfd = objfile->obfd; | |
773 | ||
96baa820 | 774 | ALL_OBJFILE_OSECTIONS (objfile, s) |
c906108c | 775 | { |
78f0949b KB |
776 | int idx = s->the_bfd_section->index; |
777 | ||
778 | s->addr += ANOFFSET (delta, idx); | |
779 | s->endaddr += ANOFFSET (delta, idx); | |
c906108c SS |
780 | } |
781 | } | |
782 | ||
c906108c SS |
783 | if (objfile->ei.entry_func_lowpc != INVALID_ENTRY_LOWPC) |
784 | { | |
b8fbeb18 EZ |
785 | objfile->ei.entry_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
786 | objfile->ei.entry_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
787 | } |
788 | ||
627b3ba2 | 789 | if (objfile->ei.deprecated_entry_file_lowpc != INVALID_ENTRY_LOWPC) |
c906108c | 790 | { |
627b3ba2 AC |
791 | objfile->ei.deprecated_entry_file_lowpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
792 | objfile->ei.deprecated_entry_file_highpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
793 | } |
794 | ||
795 | if (objfile->ei.main_func_lowpc != INVALID_ENTRY_LOWPC) | |
796 | { | |
b8fbeb18 EZ |
797 | objfile->ei.main_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
798 | objfile->ei.main_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
799 | } |
800 | ||
801 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
802 | breakpoint_re_set (); | |
803 | } | |
804 | \f | |
805 | /* Many places in gdb want to test just to see if we have any partial | |
806 | symbols available. This function returns zero if none are currently | |
807 | available, nonzero otherwise. */ | |
808 | ||
809 | int | |
fba45db2 | 810 | have_partial_symbols (void) |
c906108c SS |
811 | { |
812 | struct objfile *ofp; | |
813 | ||
814 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
815 | { |
816 | if (ofp->psymtabs != NULL) | |
817 | { | |
818 | return 1; | |
819 | } | |
820 | } | |
c906108c SS |
821 | return 0; |
822 | } | |
823 | ||
824 | /* Many places in gdb want to test just to see if we have any full | |
825 | symbols available. This function returns zero if none are currently | |
826 | available, nonzero otherwise. */ | |
827 | ||
828 | int | |
fba45db2 | 829 | have_full_symbols (void) |
c906108c SS |
830 | { |
831 | struct objfile *ofp; | |
832 | ||
833 | ALL_OBJFILES (ofp) | |
c5aa993b JM |
834 | { |
835 | if (ofp->symtabs != NULL) | |
836 | { | |
837 | return 1; | |
838 | } | |
839 | } | |
c906108c SS |
840 | return 0; |
841 | } | |
842 | ||
843 | ||
844 | /* This operations deletes all objfile entries that represent solibs that | |
845 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
846 | command. | |
c5aa993b | 847 | */ |
c906108c | 848 | void |
fba45db2 | 849 | objfile_purge_solibs (void) |
c906108c | 850 | { |
c5aa993b JM |
851 | struct objfile *objf; |
852 | struct objfile *temp; | |
c906108c SS |
853 | |
854 | ALL_OBJFILES_SAFE (objf, temp) | |
855 | { | |
856 | /* We assume that the solib package has been purged already, or will | |
857 | be soon. | |
c5aa993b | 858 | */ |
2df3850c | 859 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
c906108c SS |
860 | free_objfile (objf); |
861 | } | |
862 | } | |
863 | ||
864 | ||
865 | /* Many places in gdb want to test just to see if we have any minimal | |
866 | symbols available. This function returns zero if none are currently | |
867 | available, nonzero otherwise. */ | |
868 | ||
869 | int | |
fba45db2 | 870 | have_minimal_symbols (void) |
c906108c SS |
871 | { |
872 | struct objfile *ofp; | |
873 | ||
874 | ALL_OBJFILES (ofp) | |
c5aa993b | 875 | { |
15831452 | 876 | if (ofp->minimal_symbol_count > 0) |
c5aa993b JM |
877 | { |
878 | return 1; | |
879 | } | |
880 | } | |
c906108c SS |
881 | return 0; |
882 | } | |
883 | ||
884 | #if defined(USE_MMALLOC) && defined(HAVE_MMAP) | |
885 | ||
886 | /* Given the name of a mapped symbol file in SYMSFILENAME, and the timestamp | |
887 | of the corresponding symbol file in MTIME, try to open an existing file | |
888 | with the name SYMSFILENAME and verify it is more recent than the base | |
889 | file by checking it's timestamp against MTIME. | |
890 | ||
891 | If SYMSFILENAME does not exist (or can't be stat'd), simply returns -1. | |
892 | ||
893 | If SYMSFILENAME does exist, but is out of date, we check to see if the | |
894 | user has specified creation of a mapped file. If so, we don't issue | |
895 | any warning message because we will be creating a new mapped file anyway, | |
896 | overwriting the old one. If not, then we issue a warning message so that | |
897 | the user will know why we aren't using this existing mapped symbol file. | |
898 | In either case, we return -1. | |
899 | ||
900 | If SYMSFILENAME does exist and is not out of date, but can't be opened for | |
901 | some reason, then prints an appropriate system error message and returns -1. | |
902 | ||
903 | Otherwise, returns the open file descriptor. */ | |
904 | ||
905 | static int | |
fba45db2 | 906 | open_existing_mapped_file (char *symsfilename, long mtime, int flags) |
c906108c SS |
907 | { |
908 | int fd = -1; | |
909 | struct stat sbuf; | |
910 | ||
911 | if (stat (symsfilename, &sbuf) == 0) | |
912 | { | |
913 | if (sbuf.st_mtime < mtime) | |
914 | { | |
2df3850c | 915 | if (!(flags & OBJF_MAPPED)) |
c906108c SS |
916 | { |
917 | warning ("mapped symbol file `%s' is out of date, ignored it", | |
918 | symsfilename); | |
919 | } | |
920 | } | |
921 | else if ((fd = open (symsfilename, O_RDWR)) < 0) | |
922 | { | |
923 | if (error_pre_print) | |
924 | { | |
925 | printf_unfiltered (error_pre_print); | |
926 | } | |
927 | print_sys_errmsg (symsfilename, errno); | |
928 | } | |
929 | } | |
930 | return (fd); | |
931 | } | |
932 | ||
933 | /* Look for a mapped symbol file that corresponds to FILENAME and is more | |
934 | recent than MTIME. If MAPPED is nonzero, the user has asked that gdb | |
935 | use a mapped symbol file for this file, so create a new one if one does | |
936 | not currently exist. | |
937 | ||
938 | If found, then return an open file descriptor for the file, otherwise | |
939 | return -1. | |
940 | ||
941 | This routine is responsible for implementing the policy that generates | |
942 | the name of the mapped symbol file from the name of a file containing | |
943 | symbols that gdb would like to read. Currently this policy is to append | |
944 | ".syms" to the name of the file. | |
945 | ||
946 | This routine is also responsible for implementing the policy that | |
947 | determines where the mapped symbol file is found (the search path). | |
948 | This policy is that when reading an existing mapped file, a file of | |
949 | the correct name in the current directory takes precedence over a | |
950 | file of the correct name in the same directory as the symbol file. | |
951 | When creating a new mapped file, it is always created in the current | |
952 | directory. This helps to minimize the chances of a user unknowingly | |
953 | creating big mapped files in places like /bin and /usr/local/bin, and | |
954 | allows a local copy to override a manually installed global copy (in | |
955 | /bin for example). */ | |
956 | ||
957 | static int | |
fba45db2 | 958 | open_mapped_file (char *filename, long mtime, int flags) |
c906108c SS |
959 | { |
960 | int fd; | |
961 | char *symsfilename; | |
962 | ||
963 | /* First try to open an existing file in the current directory, and | |
964 | then try the directory where the symbol file is located. */ | |
965 | ||
bdda63b0 | 966 | symsfilename = concat ("./", lbasename (filename), ".syms", (char *) NULL); |
2df3850c | 967 | if ((fd = open_existing_mapped_file (symsfilename, mtime, flags)) < 0) |
c906108c | 968 | { |
b8c9b27d | 969 | xfree (symsfilename); |
c906108c | 970 | symsfilename = concat (filename, ".syms", (char *) NULL); |
2fc18c15 | 971 | fd = open_existing_mapped_file (symsfilename, mtime, flags); |
c906108c SS |
972 | } |
973 | ||
974 | /* If we don't have an open file by now, then either the file does not | |
975 | already exist, or the base file has changed since it was created. In | |
976 | either case, if the user has specified use of a mapped file, then | |
977 | create a new mapped file, truncating any existing one. If we can't | |
978 | create one, print a system error message saying why we can't. | |
979 | ||
980 | By default the file is rw for everyone, with the user's umask taking | |
981 | care of turning off the permissions the user wants off. */ | |
982 | ||
2fc18c15 | 983 | if ((fd < 0) && (flags & OBJF_MAPPED)) |
c906108c | 984 | { |
b8c9b27d | 985 | xfree (symsfilename); |
bdda63b0 | 986 | symsfilename = concat ("./", lbasename (filename), ".syms", |
c906108c SS |
987 | (char *) NULL); |
988 | if ((fd = open (symsfilename, O_RDWR | O_CREAT | O_TRUNC, 0666)) < 0) | |
989 | { | |
990 | if (error_pre_print) | |
991 | { | |
992 | printf_unfiltered (error_pre_print); | |
993 | } | |
994 | print_sys_errmsg (symsfilename, errno); | |
995 | } | |
996 | } | |
997 | ||
b8c9b27d | 998 | xfree (symsfilename); |
c906108c SS |
999 | return (fd); |
1000 | } | |
1001 | ||
4efb68b1 | 1002 | static void * |
fba45db2 | 1003 | map_to_file (int fd) |
c906108c | 1004 | { |
4efb68b1 | 1005 | void *md; |
c906108c SS |
1006 | CORE_ADDR mapto; |
1007 | ||
4efb68b1 | 1008 | md = mmalloc_attach (fd, 0); |
c906108c SS |
1009 | if (md != NULL) |
1010 | { | |
1011 | mapto = (CORE_ADDR) mmalloc_getkey (md, 1); | |
1012 | md = mmalloc_detach (md); | |
1013 | if (md != NULL) | |
1014 | { | |
1015 | /* FIXME: should figure out why detach failed */ | |
1016 | md = NULL; | |
1017 | } | |
1018 | else if (mapto != (CORE_ADDR) NULL) | |
1019 | { | |
1020 | /* This mapping file needs to be remapped at "mapto" */ | |
4efb68b1 | 1021 | md = mmalloc_attach (fd, mapto); |
c906108c SS |
1022 | } |
1023 | else | |
1024 | { | |
1025 | /* This is a freshly created mapping file. */ | |
1026 | mapto = (CORE_ADDR) mmalloc_findbase (20 * 1024 * 1024); | |
1027 | if (mapto != 0) | |
1028 | { | |
1029 | /* To avoid reusing the freshly created mapping file, at the | |
c5aa993b JM |
1030 | address selected by mmap, we must truncate it before trying |
1031 | to do an attach at the address we want. */ | |
c906108c | 1032 | ftruncate (fd, 0); |
4efb68b1 | 1033 | md = mmalloc_attach (fd, mapto); |
c906108c SS |
1034 | if (md != NULL) |
1035 | { | |
4efb68b1 | 1036 | mmalloc_setkey (md, 1, mapto); |
c906108c SS |
1037 | } |
1038 | } | |
1039 | } | |
1040 | } | |
1041 | return (md); | |
1042 | } | |
1043 | ||
c5aa993b | 1044 | #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
c906108c | 1045 | |
198beae2 AC |
1046 | /* Returns a section whose range includes PC and SECTION, or NULL if |
1047 | none found. Note the distinction between the return type, struct | |
1048 | obj_section (which is defined in gdb), and the input type "struct | |
1049 | bfd_section" (which is a bfd-defined data type). The obj_section | |
1050 | contains a pointer to the "struct bfd_section". */ | |
c906108c SS |
1051 | |
1052 | struct obj_section * | |
198beae2 | 1053 | find_pc_sect_section (CORE_ADDR pc, struct bfd_section *section) |
c906108c SS |
1054 | { |
1055 | struct obj_section *s; | |
1056 | struct objfile *objfile; | |
c5aa993b | 1057 | |
96baa820 | 1058 | ALL_OBJSECTIONS (objfile, s) |
c5aa993b JM |
1059 | if ((section == 0 || section == s->the_bfd_section) && |
1060 | s->addr <= pc && pc < s->endaddr) | |
c5aa993b | 1061 | return (s); |
c906108c | 1062 | |
c5aa993b | 1063 | return (NULL); |
c906108c SS |
1064 | } |
1065 | ||
1066 | /* Returns a section whose range includes PC or NULL if none found. | |
1067 | Backward compatibility, no section. */ | |
1068 | ||
1069 | struct obj_section * | |
fba45db2 | 1070 | find_pc_section (CORE_ADDR pc) |
c906108c SS |
1071 | { |
1072 | return find_pc_sect_section (pc, find_pc_mapped_section (pc)); | |
1073 | } | |
c5aa993b | 1074 | |
c906108c SS |
1075 | |
1076 | /* In SVR4, we recognize a trampoline by it's section name. | |
1077 | That is, if the pc is in a section named ".plt" then we are in | |
1078 | a trampoline. */ | |
1079 | ||
1080 | int | |
fba45db2 | 1081 | in_plt_section (CORE_ADDR pc, char *name) |
c906108c SS |
1082 | { |
1083 | struct obj_section *s; | |
1084 | int retval = 0; | |
c5aa993b JM |
1085 | |
1086 | s = find_pc_section (pc); | |
1087 | ||
c906108c SS |
1088 | retval = (s != NULL |
1089 | && s->the_bfd_section->name != NULL | |
1090 | && STREQ (s->the_bfd_section->name, ".plt")); | |
c5aa993b | 1091 | return (retval); |
c906108c | 1092 | } |
7be570e7 JM |
1093 | |
1094 | /* Return nonzero if NAME is in the import list of OBJFILE. Else | |
1095 | return zero. */ | |
1096 | ||
1097 | int | |
fba45db2 | 1098 | is_in_import_list (char *name, struct objfile *objfile) |
7be570e7 | 1099 | { |
52f0bd74 | 1100 | int i; |
7be570e7 JM |
1101 | |
1102 | if (!objfile || !name || !*name) | |
1103 | return 0; | |
1104 | ||
1105 | for (i = 0; i < objfile->import_list_size; i++) | |
1106 | if (objfile->import_list[i] && STREQ (name, objfile->import_list[i])) | |
1107 | return 1; | |
1108 | return 0; | |
1109 | } | |
0d0e1a63 MK |
1110 | \f |
1111 | ||
1112 | /* Keep a registry of per-objfile data-pointers required by other GDB | |
1113 | modules. */ | |
1114 | ||
1115 | struct objfile_data | |
1116 | { | |
1117 | unsigned index; | |
1118 | }; | |
1119 | ||
1120 | struct objfile_data_registration | |
1121 | { | |
1122 | struct objfile_data *data; | |
1123 | struct objfile_data_registration *next; | |
1124 | }; | |
1125 | ||
1126 | struct objfile_data_registry | |
1127 | { | |
1128 | struct objfile_data_registration *registrations; | |
1129 | unsigned num_registrations; | |
1130 | }; | |
1131 | ||
1132 | static struct objfile_data_registry objfile_data_registry = { NULL, 0 }; | |
1133 | ||
1134 | const struct objfile_data * | |
1135 | register_objfile_data (void) | |
1136 | { | |
1137 | struct objfile_data_registration **curr; | |
1138 | ||
1139 | /* Append new registration. */ | |
1140 | for (curr = &objfile_data_registry.registrations; | |
1141 | *curr != NULL; curr = &(*curr)->next); | |
7be570e7 | 1142 | |
0d0e1a63 MK |
1143 | *curr = XMALLOC (struct objfile_data_registration); |
1144 | (*curr)->next = NULL; | |
1145 | (*curr)->data = XMALLOC (struct objfile_data); | |
1146 | (*curr)->data->index = objfile_data_registry.num_registrations++; | |
1147 | ||
1148 | return (*curr)->data; | |
1149 | } | |
1150 | ||
1151 | static void | |
1152 | objfile_alloc_data (struct objfile *objfile) | |
1153 | { | |
1154 | gdb_assert (objfile->data == NULL); | |
1155 | objfile->num_data = objfile_data_registry.num_registrations; | |
1156 | objfile->data = XCALLOC (objfile->num_data, void *); | |
1157 | } | |
1158 | ||
1159 | static void | |
1160 | objfile_free_data (struct objfile *objfile) | |
1161 | { | |
1162 | gdb_assert (objfile->data != NULL); | |
1163 | xfree (objfile->data); | |
1164 | objfile->data = NULL; | |
1165 | } | |
1166 | ||
7b097ae3 MK |
1167 | void |
1168 | clear_objfile_data (struct objfile *objfile) | |
1169 | { | |
1170 | gdb_assert (objfile->data != NULL); | |
1171 | memset (objfile->data, 0, objfile->num_data * sizeof (void *)); | |
1172 | } | |
1173 | ||
0d0e1a63 MK |
1174 | void |
1175 | set_objfile_data (struct objfile *objfile, const struct objfile_data *data, | |
1176 | void *value) | |
1177 | { | |
1178 | gdb_assert (data->index < objfile->num_data); | |
1179 | objfile->data[data->index] = value; | |
1180 | } | |
1181 | ||
1182 | void * | |
1183 | objfile_data (struct objfile *objfile, const struct objfile_data *data) | |
1184 | { | |
1185 | gdb_assert (data->index < objfile->num_data); | |
1186 | return objfile->data[data->index]; | |
1187 | } |