1 /* GDB routines for manipulating objfiles.
3 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 2001, 2002, 2003 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
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.
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.
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. */
25 /* This file contains support routines for creating, manipulating, and
26 destroying objfile structures. */
29 #include "bfd.h" /* Binary File Description */
33 #include "gdb-stabs.h"
37 #include <sys/types.h>
40 #include "gdb_obstack.h"
41 #include "gdb_string.h"
44 #include "breakpoint.h"
46 /* Prototypes for local functions */
48 #if defined(USE_MMALLOC) && defined(HAVE_MMAP)
52 static int open_existing_mapped_file (char *, long, int);
54 static int open_mapped_file (char *filename
, long mtime
, int flags
);
56 static void *map_to_file (int);
58 #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
60 static void add_to_objfile_sections (bfd
*, sec_ptr
, void *);
62 /* Externally visible variables that are owned by this module.
63 See declarations in objfile.h for more info. */
65 struct objfile
*object_files
; /* Linked list of all objfiles */
66 struct objfile
*current_objfile
; /* For symbol file being read in */
67 struct objfile
*symfile_objfile
; /* Main symbol table loaded from */
68 struct objfile
*rt_common_objfile
; /* For runtime common symbols */
70 int mapped_symbol_files
; /* Try to use mapped symbol files */
72 /* Locate all mappable sections of a BFD file.
73 objfile_p_char is a char * to get it through
74 bfd_map_over_sections; we cast it back to its proper type. */
76 #ifndef TARGET_KEEP_SECTION
77 #define TARGET_KEEP_SECTION(ASECT) 0
80 /* Called via bfd_map_over_sections to build up the section table that
81 the objfile references. The objfile contains pointers to the start
82 of the table (objfile->sections) and to the first location after
83 the end of the table (objfile->sections_end). */
86 add_to_objfile_sections (bfd
*abfd
, sec_ptr asect
, void *objfile_p_char
)
88 struct objfile
*objfile
= (struct objfile
*) objfile_p_char
;
89 struct obj_section section
;
92 aflag
= bfd_get_section_flags (abfd
, asect
);
94 if (!(aflag
& SEC_ALLOC
) && !(TARGET_KEEP_SECTION (asect
)))
97 if (0 == bfd_section_size (abfd
, asect
))
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
);
105 obstack_grow (&objfile
->psymbol_obstack
, (char *) §ion
, sizeof (section
));
106 objfile
->sections_end
= (struct obj_section
*) (((unsigned long) objfile
->sections_end
) + 1);
109 /* Builds a section table for OBJFILE.
110 Returns 0 if OK, 1 on error (in which case bfd_error contains the
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.
119 Also note that the OFFSET and OVLY_MAPPED in each table entry
120 are initialized to zero.
122 Also note that if anything else writes to the psymbol obstack while
123 we are building the table, we're pretty much hosed. */
126 build_objfile_section_table (struct objfile
*objfile
)
128 /* objfile->sections can be already set when reading a mapped symbol
129 file. I believe that we do need to rebuild the section table in
130 this case (we rebuild other things derived from the bfd), but we
131 can't free the old one (it's in the psymbol_obstack). So we just
132 waste some memory. */
134 objfile
->sections_end
= 0;
135 bfd_map_over_sections (objfile
->obfd
, add_to_objfile_sections
, (char *) objfile
);
136 objfile
->sections
= (struct obj_section
*)
137 obstack_finish (&objfile
->psymbol_obstack
);
138 objfile
->sections_end
= objfile
->sections
+ (unsigned long) objfile
->sections_end
;
142 /* Given a pointer to an initialized bfd (ABFD) and some flag bits
143 allocate a new objfile struct, fill it in as best we can, link it
144 into the list of all known objfiles, and return a pointer to the
147 The FLAGS word contains various bits (OBJF_*) that can be taken as
148 requests for specific operations, like trying to open a mapped
149 version of the objfile (OBJF_MAPPED). Other bits like
150 OBJF_SHARED are simply copied through to the new objfile flags
154 allocate_objfile (bfd
*abfd
, int flags
)
156 struct objfile
*objfile
= NULL
;
157 struct objfile
*last_one
= NULL
;
159 if (mapped_symbol_files
)
160 flags
|= OBJF_MAPPED
;
162 #if defined(USE_MMALLOC) && defined(HAVE_MMAP)
166 /* If we can support mapped symbol files, try to open/reopen the
167 mapped file that corresponds to the file from which we wish to
168 read symbols. If the objfile is to be mapped, we must malloc
169 the structure itself using the mmap version, and arrange that
170 all memory allocation for the objfile uses the mmap routines.
171 If we are reusing an existing mapped file, from which we get
172 our objfile pointer, we have to make sure that we update the
173 pointers to the alloc/free functions in the obstack, in case
174 these functions have moved within the current gdb. */
178 fd
= open_mapped_file (bfd_get_filename (abfd
), bfd_get_mtime (abfd
),
184 if ((md
= map_to_file (fd
)) == NULL
)
188 else if ((objfile
= (struct objfile
*) mmalloc_getkey (md
, 0)) != NULL
)
190 /* Update memory corruption handler function addresses. */
194 /* Update pointers to functions to *our* copies */
195 if (objfile
->demangled_names_hash
)
196 htab_set_functions_ex
197 (objfile
->demangled_names_hash
, htab_hash_string
,
198 (int (*) (const void *, const void *)) streq
, NULL
,
199 objfile
->md
, xmcalloc
, xmfree
);
200 obstack_chunkfun (&objfile
->psymbol_cache
.cache
, xmmalloc
);
201 obstack_freefun (&objfile
->psymbol_cache
.cache
, xmfree
);
202 obstack_chunkfun (&objfile
->macro_cache
.cache
, xmmalloc
);
203 obstack_freefun (&objfile
->macro_cache
.cache
, xmfree
);
204 obstack_chunkfun (&objfile
->psymbol_obstack
, xmmalloc
);
205 obstack_freefun (&objfile
->psymbol_obstack
, xmfree
);
206 obstack_chunkfun (&objfile
->symbol_obstack
, xmmalloc
);
207 obstack_freefun (&objfile
->symbol_obstack
, xmfree
);
208 obstack_chunkfun (&objfile
->type_obstack
, xmmalloc
);
209 obstack_freefun (&objfile
->type_obstack
, xmfree
);
210 /* If already in objfile list, unlink it. */
211 unlink_objfile (objfile
);
212 /* Forget things specific to a particular gdb, may have changed. */
218 /* Set up to detect internal memory corruption. MUST be
219 done before the first malloc. See comments in
220 init_malloc() and mmcheck(). */
224 objfile
= (struct objfile
*)
225 xmmalloc (md
, sizeof (struct objfile
));
226 memset (objfile
, 0, sizeof (struct objfile
));
229 objfile
->flags
|= OBJF_MAPPED
;
230 mmalloc_setkey (objfile
->md
, 0, objfile
);
231 obstack_specify_allocation_with_arg (&objfile
->psymbol_cache
.cache
,
232 0, 0, xmmalloc
, xmfree
,
234 obstack_specify_allocation_with_arg (&objfile
->macro_cache
.cache
,
235 0, 0, xmmalloc
, xmfree
,
237 obstack_specify_allocation_with_arg (&objfile
->psymbol_obstack
,
238 0, 0, xmmalloc
, xmfree
,
240 obstack_specify_allocation_with_arg (&objfile
->symbol_obstack
,
241 0, 0, xmmalloc
, xmfree
,
243 obstack_specify_allocation_with_arg (&objfile
->type_obstack
,
244 0, 0, xmmalloc
, xmfree
,
249 if ((flags
& OBJF_MAPPED
) && (objfile
== NULL
))
251 warning ("symbol table for '%s' will not be mapped",
252 bfd_get_filename (abfd
));
253 flags
&= ~OBJF_MAPPED
;
256 #else /* !defined(USE_MMALLOC) || !defined(HAVE_MMAP) */
258 if (flags
& OBJF_MAPPED
)
260 warning ("mapped symbol tables are not supported on this machine; missing or broken mmap().");
262 /* Turn off the global flag so we don't try to do mapped symbol tables
263 any more, which shuts up gdb unless the user specifically gives the
264 "mapped" keyword again. */
266 mapped_symbol_files
= 0;
267 flags
&= ~OBJF_MAPPED
;
270 #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
272 /* If we don't support mapped symbol files, didn't ask for the file to be
273 mapped, or failed to open the mapped file for some reason, then revert
274 back to an unmapped objfile. */
278 objfile
= (struct objfile
*) xmalloc (sizeof (struct objfile
));
279 memset (objfile
, 0, sizeof (struct objfile
));
281 objfile
->psymbol_cache
= bcache_xmalloc ();
282 objfile
->macro_cache
= bcache_xmalloc ();
283 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0, xmalloc
,
285 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0, xmalloc
,
287 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0, xmalloc
,
289 flags
&= ~OBJF_MAPPED
;
291 terminate_minimal_symbol_table (objfile
);
294 /* Update the per-objfile information that comes from the bfd, ensuring
295 that any data that is reference is saved in the per-objfile data
298 objfile
->obfd
= abfd
;
299 if (objfile
->name
!= NULL
)
301 xmfree (objfile
->md
, objfile
->name
);
305 objfile
->name
= mstrsave (objfile
->md
, bfd_get_filename (abfd
));
306 objfile
->mtime
= bfd_get_mtime (abfd
);
308 /* Build section table. */
310 if (build_objfile_section_table (objfile
))
312 error ("Can't find the file sections in `%s': %s",
313 objfile
->name
, bfd_errmsg (bfd_get_error ()));
317 /* Initialize the section indexes for this objfile, so that we can
318 later detect if they are used w/o being properly assigned to. */
320 objfile
->sect_index_text
= -1;
321 objfile
->sect_index_data
= -1;
322 objfile
->sect_index_bss
= -1;
323 objfile
->sect_index_rodata
= -1;
325 /* Add this file onto the tail of the linked list of other such files. */
327 objfile
->next
= NULL
;
328 if (object_files
== NULL
)
329 object_files
= objfile
;
332 for (last_one
= object_files
;
334 last_one
= last_one
->next
);
335 last_one
->next
= objfile
;
338 /* Save passed in flag bits. */
339 objfile
->flags
|= flags
;
345 /* Create the terminating entry of OBJFILE's minimal symbol table.
346 If OBJFILE->msymbols is zero, allocate a single entry from
347 OBJFILE->symbol_obstack; otherwise, just initialize
348 OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */
350 terminate_minimal_symbol_table (struct objfile
*objfile
)
352 if (! objfile
->msymbols
)
353 objfile
->msymbols
= ((struct minimal_symbol
*)
354 obstack_alloc (&objfile
->symbol_obstack
,
355 sizeof (objfile
->msymbols
[0])));
358 struct minimal_symbol
*m
359 = &objfile
->msymbols
[objfile
->minimal_symbol_count
];
361 memset (m
, 0, sizeof (*m
));
362 SYMBOL_NAME (m
) = NULL
;
363 SYMBOL_VALUE_ADDRESS (m
) = 0;
364 MSYMBOL_INFO (m
) = NULL
;
365 MSYMBOL_TYPE (m
) = mst_unknown
;
366 SYMBOL_INIT_LANGUAGE_SPECIFIC (m
, language_unknown
);
371 /* Put one object file before a specified on in the global list.
372 This can be used to make sure an object file is destroyed before
373 another when using ALL_OBJFILES_SAFE to free all objfiles. */
375 put_objfile_before (struct objfile
*objfile
, struct objfile
*before_this
)
377 struct objfile
**objp
;
379 unlink_objfile (objfile
);
381 for (objp
= &object_files
; *objp
!= NULL
; objp
= &((*objp
)->next
))
383 if (*objp
== before_this
)
385 objfile
->next
= *objp
;
391 internal_error (__FILE__
, __LINE__
,
392 "put_objfile_before: before objfile not in list");
395 /* Put OBJFILE at the front of the list. */
398 objfile_to_front (struct objfile
*objfile
)
400 struct objfile
**objp
;
401 for (objp
= &object_files
; *objp
!= NULL
; objp
= &((*objp
)->next
))
403 if (*objp
== objfile
)
405 /* Unhook it from where it is. */
406 *objp
= objfile
->next
;
407 /* Put it in the front. */
408 objfile
->next
= object_files
;
409 object_files
= objfile
;
415 /* Unlink OBJFILE from the list of known objfiles, if it is found in the
418 It is not a bug, or error, to call this function if OBJFILE is not known
419 to be in the current list. This is done in the case of mapped objfiles,
420 for example, just to ensure that the mapped objfile doesn't appear twice
421 in the list. Since the list is threaded, linking in a mapped objfile
422 twice would create a circular list.
424 If OBJFILE turns out to be in the list, we zap it's NEXT pointer after
425 unlinking it, just to ensure that we have completely severed any linkages
426 between the OBJFILE and the list. */
429 unlink_objfile (struct objfile
*objfile
)
431 struct objfile
**objpp
;
433 for (objpp
= &object_files
; *objpp
!= NULL
; objpp
= &((*objpp
)->next
))
435 if (*objpp
== objfile
)
437 *objpp
= (*objpp
)->next
;
438 objfile
->next
= NULL
;
443 internal_error (__FILE__
, __LINE__
,
444 "unlink_objfile: objfile already unlinked");
448 /* Destroy an objfile and all the symtabs and psymtabs under it. Note
449 that as much as possible is allocated on the symbol_obstack and
450 psymbol_obstack, so that the memory can be efficiently freed.
452 Things which we do NOT free because they are not in malloc'd memory
453 or not in memory specific to the objfile include:
457 FIXME: If the objfile is using reusable symbol information (via mmalloc),
458 then we need to take into account the fact that more than one process
459 may be using the symbol information at the same time (when mmalloc is
460 extended to support cooperative locking). When more than one process
461 is using the mapped symbol info, we need to be more careful about when
462 we free objects in the reusable area. */
465 free_objfile (struct objfile
*objfile
)
467 if (objfile
->separate_debug_objfile
)
469 free_objfile (objfile
->separate_debug_objfile
);
472 if (objfile
->separate_debug_objfile_backlink
)
474 /* We freed the separate debug file, make sure the base objfile
475 doesn't reference it. */
476 objfile
->separate_debug_objfile_backlink
->separate_debug_objfile
= NULL
;
479 /* First do any symbol file specific actions required when we are
480 finished with a particular symbol file. Note that if the objfile
481 is using reusable symbol information (via mmalloc) then each of
482 these routines is responsible for doing the correct thing, either
483 freeing things which are valid only during this particular gdb
484 execution, or leaving them to be reused during the next one. */
486 if (objfile
->sf
!= NULL
)
488 (*objfile
->sf
->sym_finish
) (objfile
);
491 /* We always close the bfd. */
493 if (objfile
->obfd
!= NULL
)
495 char *name
= bfd_get_filename (objfile
->obfd
);
496 if (!bfd_close (objfile
->obfd
))
497 warning ("cannot close \"%s\": %s",
498 name
, bfd_errmsg (bfd_get_error ()));
502 /* Remove it from the chain of all objfiles. */
504 unlink_objfile (objfile
);
506 /* If we are going to free the runtime common objfile, mark it
509 if (objfile
== rt_common_objfile
)
510 rt_common_objfile
= NULL
;
512 /* Before the symbol table code was redone to make it easier to
513 selectively load and remove information particular to a specific
514 linkage unit, gdb used to do these things whenever the monolithic
515 symbol table was blown away. How much still needs to be done
516 is unknown, but we play it safe for now and keep each action until
517 it is shown to be no longer needed. */
519 /* I *think* all our callers call clear_symtab_users. If so, no need
520 to call this here. */
521 clear_pc_function_cache ();
523 /* The last thing we do is free the objfile struct itself for the
524 non-reusable case, or detach from the mapped file for the
525 reusable case. Note that the mmalloc_detach or the xmfree() is
526 the last thing we can do with this objfile. */
528 #if defined(USE_MMALLOC) && defined(HAVE_MMAP)
530 if (objfile
->flags
& OBJF_MAPPED
)
532 /* Remember the fd so we can close it. We can't close it before
533 doing the detach, and after the detach the objfile is gone. */
536 mmfd
= objfile
->mmfd
;
537 mmalloc_detach (objfile
->md
);
542 #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
544 /* If we still have an objfile, then either we don't support reusable
545 objfiles or this one was not reusable. So free it normally. */
549 if (objfile
->name
!= NULL
)
551 xmfree (objfile
->md
, objfile
->name
);
553 if (objfile
->global_psymbols
.list
)
554 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
555 if (objfile
->static_psymbols
.list
)
556 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
557 /* Free the obstacks for non-reusable objfiles */
558 bcache_xfree (objfile
->psymbol_cache
);
559 bcache_xfree (objfile
->macro_cache
);
560 if (objfile
->demangled_names_hash
)
561 htab_delete (objfile
->demangled_names_hash
);
562 obstack_free (&objfile
->psymbol_obstack
, 0);
563 obstack_free (&objfile
->symbol_obstack
, 0);
564 obstack_free (&objfile
->type_obstack
, 0);
565 xmfree (objfile
->md
, objfile
);
571 do_free_objfile_cleanup (void *obj
)
577 make_cleanup_free_objfile (struct objfile
*obj
)
579 return make_cleanup (do_free_objfile_cleanup
, obj
);
582 /* Free all the object files at once and clean up their users. */
585 free_all_objfiles (void)
587 struct objfile
*objfile
, *temp
;
589 ALL_OBJFILES_SAFE (objfile
, temp
)
591 free_objfile (objfile
);
593 clear_symtab_users ();
596 /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS
597 entries in new_offsets. */
599 objfile_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
)
601 struct section_offsets
*delta
=
602 (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
606 int something_changed
= 0;
607 for (i
= 0; i
< objfile
->num_sections
; ++i
)
610 ANOFFSET (new_offsets
, i
) - ANOFFSET (objfile
->section_offsets
, i
);
611 if (ANOFFSET (delta
, i
) != 0)
612 something_changed
= 1;
614 if (!something_changed
)
618 /* OK, get all the symtabs. */
622 ALL_OBJFILE_SYMTABS (objfile
, s
)
625 struct blockvector
*bv
;
628 /* First the line table. */
632 for (i
= 0; i
< l
->nitems
; ++i
)
633 l
->item
[i
].pc
+= ANOFFSET (delta
, s
->block_line_section
);
636 /* Don't relocate a shared blockvector more than once. */
640 bv
= BLOCKVECTOR (s
);
641 for (i
= 0; i
< BLOCKVECTOR_NBLOCKS (bv
); ++i
)
647 b
= BLOCKVECTOR_BLOCK (bv
, i
);
648 BLOCK_START (b
) += ANOFFSET (delta
, s
->block_line_section
);
649 BLOCK_END (b
) += ANOFFSET (delta
, s
->block_line_section
);
651 ALL_BLOCK_SYMBOLS (b
, j
, sym
)
653 fixup_symbol_section (sym
, objfile
);
655 /* The RS6000 code from which this was taken skipped
656 any symbols in STRUCT_NAMESPACE or UNDEF_NAMESPACE.
657 But I'm leaving out that test, on the theory that
658 they can't possibly pass the tests below. */
659 if ((SYMBOL_CLASS (sym
) == LOC_LABEL
660 || SYMBOL_CLASS (sym
) == LOC_STATIC
661 || SYMBOL_CLASS (sym
) == LOC_INDIRECT
)
662 && SYMBOL_SECTION (sym
) >= 0)
664 SYMBOL_VALUE_ADDRESS (sym
) +=
665 ANOFFSET (delta
, SYMBOL_SECTION (sym
));
667 #ifdef MIPS_EFI_SYMBOL_NAME
668 /* Relocate Extra Function Info for ecoff. */
670 else if (SYMBOL_CLASS (sym
) == LOC_CONST
671 && SYMBOL_NAMESPACE (sym
) == LABEL_NAMESPACE
672 && strcmp (SYMBOL_NAME (sym
), MIPS_EFI_SYMBOL_NAME
) == 0)
673 ecoff_relocate_efi (sym
, ANOFFSET (delta
,
674 s
->block_line_section
));
682 struct partial_symtab
*p
;
684 ALL_OBJFILE_PSYMTABS (objfile
, p
)
686 p
->textlow
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
687 p
->texthigh
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
692 struct partial_symbol
**psym
;
694 for (psym
= objfile
->global_psymbols
.list
;
695 psym
< objfile
->global_psymbols
.next
;
698 fixup_psymbol_section (*psym
, objfile
);
699 if (SYMBOL_SECTION (*psym
) >= 0)
700 SYMBOL_VALUE_ADDRESS (*psym
) += ANOFFSET (delta
,
701 SYMBOL_SECTION (*psym
));
703 for (psym
= objfile
->static_psymbols
.list
;
704 psym
< objfile
->static_psymbols
.next
;
707 fixup_psymbol_section (*psym
, objfile
);
708 if (SYMBOL_SECTION (*psym
) >= 0)
709 SYMBOL_VALUE_ADDRESS (*psym
) += ANOFFSET (delta
,
710 SYMBOL_SECTION (*psym
));
715 struct minimal_symbol
*msym
;
716 ALL_OBJFILE_MSYMBOLS (objfile
, msym
)
717 if (SYMBOL_SECTION (msym
) >= 0)
718 SYMBOL_VALUE_ADDRESS (msym
) += ANOFFSET (delta
, SYMBOL_SECTION (msym
));
720 /* Relocating different sections by different amounts may cause the symbols
721 to be out of order. */
722 msymbols_sort (objfile
);
726 for (i
= 0; i
< objfile
->num_sections
; ++i
)
727 (objfile
->section_offsets
)->offsets
[i
] = ANOFFSET (new_offsets
, i
);
730 if (objfile
->ei
.entry_point
!= ~(CORE_ADDR
) 0)
732 /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT
733 only as a fallback. */
734 struct obj_section
*s
;
735 s
= find_pc_section (objfile
->ei
.entry_point
);
737 objfile
->ei
.entry_point
+= ANOFFSET (delta
, s
->the_bfd_section
->index
);
739 objfile
->ei
.entry_point
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
743 struct obj_section
*s
;
746 abfd
= objfile
->obfd
;
748 ALL_OBJFILE_OSECTIONS (objfile
, s
)
750 int idx
= s
->the_bfd_section
->index
;
752 s
->addr
+= ANOFFSET (delta
, idx
);
753 s
->endaddr
+= ANOFFSET (delta
, idx
);
757 if (objfile
->ei
.entry_func_lowpc
!= INVALID_ENTRY_LOWPC
)
759 objfile
->ei
.entry_func_lowpc
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
760 objfile
->ei
.entry_func_highpc
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
763 if (objfile
->ei
.entry_file_lowpc
!= INVALID_ENTRY_LOWPC
)
765 objfile
->ei
.entry_file_lowpc
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
766 objfile
->ei
.entry_file_highpc
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
769 if (objfile
->ei
.main_func_lowpc
!= INVALID_ENTRY_LOWPC
)
771 objfile
->ei
.main_func_lowpc
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
772 objfile
->ei
.main_func_highpc
+= ANOFFSET (delta
, SECT_OFF_TEXT (objfile
));
775 /* Relocate breakpoints as necessary, after things are relocated. */
776 breakpoint_re_set ();
779 /* Many places in gdb want to test just to see if we have any partial
780 symbols available. This function returns zero if none are currently
781 available, nonzero otherwise. */
784 have_partial_symbols (void)
790 if (ofp
->psymtabs
!= NULL
)
798 /* Many places in gdb want to test just to see if we have any full
799 symbols available. This function returns zero if none are currently
800 available, nonzero otherwise. */
803 have_full_symbols (void)
809 if (ofp
->symtabs
!= NULL
)
818 /* This operations deletes all objfile entries that represent solibs that
819 weren't explicitly loaded by the user, via e.g., the add-symbol-file
823 objfile_purge_solibs (void)
825 struct objfile
*objf
;
826 struct objfile
*temp
;
828 ALL_OBJFILES_SAFE (objf
, temp
)
830 /* We assume that the solib package has been purged already, or will
833 if (!(objf
->flags
& OBJF_USERLOADED
) && (objf
->flags
& OBJF_SHARED
))
839 /* Many places in gdb want to test just to see if we have any minimal
840 symbols available. This function returns zero if none are currently
841 available, nonzero otherwise. */
844 have_minimal_symbols (void)
850 if (ofp
->minimal_symbol_count
> 0)
858 #if defined(USE_MMALLOC) && defined(HAVE_MMAP)
860 /* Given the name of a mapped symbol file in SYMSFILENAME, and the timestamp
861 of the corresponding symbol file in MTIME, try to open an existing file
862 with the name SYMSFILENAME and verify it is more recent than the base
863 file by checking it's timestamp against MTIME.
865 If SYMSFILENAME does not exist (or can't be stat'd), simply returns -1.
867 If SYMSFILENAME does exist, but is out of date, we check to see if the
868 user has specified creation of a mapped file. If so, we don't issue
869 any warning message because we will be creating a new mapped file anyway,
870 overwriting the old one. If not, then we issue a warning message so that
871 the user will know why we aren't using this existing mapped symbol file.
872 In either case, we return -1.
874 If SYMSFILENAME does exist and is not out of date, but can't be opened for
875 some reason, then prints an appropriate system error message and returns -1.
877 Otherwise, returns the open file descriptor. */
880 open_existing_mapped_file (char *symsfilename
, long mtime
, int flags
)
885 if (stat (symsfilename
, &sbuf
) == 0)
887 if (sbuf
.st_mtime
< mtime
)
889 if (!(flags
& OBJF_MAPPED
))
891 warning ("mapped symbol file `%s' is out of date, ignored it",
895 else if ((fd
= open (symsfilename
, O_RDWR
)) < 0)
899 printf_unfiltered (error_pre_print
);
901 print_sys_errmsg (symsfilename
, errno
);
907 /* Look for a mapped symbol file that corresponds to FILENAME and is more
908 recent than MTIME. If MAPPED is nonzero, the user has asked that gdb
909 use a mapped symbol file for this file, so create a new one if one does
912 If found, then return an open file descriptor for the file, otherwise
915 This routine is responsible for implementing the policy that generates
916 the name of the mapped symbol file from the name of a file containing
917 symbols that gdb would like to read. Currently this policy is to append
918 ".syms" to the name of the file.
920 This routine is also responsible for implementing the policy that
921 determines where the mapped symbol file is found (the search path).
922 This policy is that when reading an existing mapped file, a file of
923 the correct name in the current directory takes precedence over a
924 file of the correct name in the same directory as the symbol file.
925 When creating a new mapped file, it is always created in the current
926 directory. This helps to minimize the chances of a user unknowingly
927 creating big mapped files in places like /bin and /usr/local/bin, and
928 allows a local copy to override a manually installed global copy (in
929 /bin for example). */
932 open_mapped_file (char *filename
, long mtime
, int flags
)
937 /* First try to open an existing file in the current directory, and
938 then try the directory where the symbol file is located. */
940 symsfilename
= concat ("./", lbasename (filename
), ".syms", (char *) NULL
);
941 if ((fd
= open_existing_mapped_file (symsfilename
, mtime
, flags
)) < 0)
943 xfree (symsfilename
);
944 symsfilename
= concat (filename
, ".syms", (char *) NULL
);
945 fd
= open_existing_mapped_file (symsfilename
, mtime
, flags
);
948 /* If we don't have an open file by now, then either the file does not
949 already exist, or the base file has changed since it was created. In
950 either case, if the user has specified use of a mapped file, then
951 create a new mapped file, truncating any existing one. If we can't
952 create one, print a system error message saying why we can't.
954 By default the file is rw for everyone, with the user's umask taking
955 care of turning off the permissions the user wants off. */
957 if ((fd
< 0) && (flags
& OBJF_MAPPED
))
959 xfree (symsfilename
);
960 symsfilename
= concat ("./", lbasename (filename
), ".syms",
962 if ((fd
= open (symsfilename
, O_RDWR
| O_CREAT
| O_TRUNC
, 0666)) < 0)
966 printf_unfiltered (error_pre_print
);
968 print_sys_errmsg (symsfilename
, errno
);
972 xfree (symsfilename
);
982 md
= mmalloc_attach (fd
, 0);
985 mapto
= (CORE_ADDR
) mmalloc_getkey (md
, 1);
986 md
= mmalloc_detach (md
);
989 /* FIXME: should figure out why detach failed */
992 else if (mapto
!= (CORE_ADDR
) NULL
)
994 /* This mapping file needs to be remapped at "mapto" */
995 md
= mmalloc_attach (fd
, mapto
);
999 /* This is a freshly created mapping file. */
1000 mapto
= (CORE_ADDR
) mmalloc_findbase (20 * 1024 * 1024);
1003 /* To avoid reusing the freshly created mapping file, at the
1004 address selected by mmap, we must truncate it before trying
1005 to do an attach at the address we want. */
1007 md
= mmalloc_attach (fd
, mapto
);
1010 mmalloc_setkey (md
, 1, mapto
);
1018 #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
1020 /* Returns a section whose range includes PC and SECTION,
1021 or NULL if none found. Note the distinction between the return type,
1022 struct obj_section (which is defined in gdb), and the input type
1023 struct sec (which is a bfd-defined data type). The obj_section
1024 contains a pointer to the bfd struct sec section. */
1026 struct obj_section
*
1027 find_pc_sect_section (CORE_ADDR pc
, struct sec
*section
)
1029 struct obj_section
*s
;
1030 struct objfile
*objfile
;
1032 ALL_OBJSECTIONS (objfile
, s
)
1033 if ((section
== 0 || section
== s
->the_bfd_section
) &&
1034 s
->addr
<= pc
&& pc
< s
->endaddr
)
1040 /* Returns a section whose range includes PC or NULL if none found.
1041 Backward compatibility, no section. */
1043 struct obj_section
*
1044 find_pc_section (CORE_ADDR pc
)
1046 return find_pc_sect_section (pc
, find_pc_mapped_section (pc
));
1050 /* In SVR4, we recognize a trampoline by it's section name.
1051 That is, if the pc is in a section named ".plt" then we are in
1055 in_plt_section (CORE_ADDR pc
, char *name
)
1057 struct obj_section
*s
;
1060 s
= find_pc_section (pc
);
1063 && s
->the_bfd_section
->name
!= NULL
1064 && STREQ (s
->the_bfd_section
->name
, ".plt"));
1068 /* Return nonzero if NAME is in the import list of OBJFILE. Else
1072 is_in_import_list (char *name
, struct objfile
*objfile
)
1076 if (!objfile
|| !name
|| !*name
)
1079 for (i
= 0; i
< objfile
->import_list_size
; i
++)
1080 if (objfile
->import_list
[i
] && STREQ (name
, objfile
->import_list
[i
]))