1 /* GDB routines for manipulating objfiles.
3 Copyright (C) 1992-2017 Free Software Foundation, Inc.
5 Contributed by Cygnus Support, using pieces from other GDB modules.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* This file contains support routines for creating, manipulating, and
23 destroying objfile structures. */
26 #include "bfd.h" /* Binary File Description */
30 #include "gdb-stabs.h"
33 #include "expression.h"
34 #include "parser-defs.h"
36 #include <sys/types.h>
39 #include "gdb_obstack.h"
42 #include "breakpoint.h"
44 #include "dictionary.h"
47 #include "arch-utils.h"
50 #include "complaints.h"
58 /* Keep a registry of per-objfile data-pointers required by other GDB
61 DEFINE_REGISTRY (objfile
, REGISTRY_ACCESS_FIELD
)
63 /* Externally visible variables that are owned by this module.
64 See declarations in objfile.h for more info. */
66 struct objfile_pspace_info
68 struct obj_section
**sections
;
71 /* Nonzero if object files have been added since the section map
73 int new_objfiles_available
;
75 /* Nonzero if the section map MUST be updated before use. */
76 int section_map_dirty
;
78 /* Nonzero if section map updates should be inhibited if possible. */
82 /* Per-program-space data key. */
83 static const struct program_space_data
*objfiles_pspace_data
;
86 objfiles_pspace_data_cleanup (struct program_space
*pspace
, void *arg
)
88 struct objfile_pspace_info
*info
= (struct objfile_pspace_info
*) arg
;
90 xfree (info
->sections
);
94 /* Get the current svr4 data. If none is found yet, add it now. This
95 function always returns a valid object. */
97 static struct objfile_pspace_info
*
98 get_objfile_pspace_data (struct program_space
*pspace
)
100 struct objfile_pspace_info
*info
;
102 info
= ((struct objfile_pspace_info
*)
103 program_space_data (pspace
, objfiles_pspace_data
));
106 info
= XCNEW (struct objfile_pspace_info
);
107 set_program_space_data (pspace
, objfiles_pspace_data
, info
);
115 /* Per-BFD data key. */
117 static const struct bfd_data
*objfiles_bfd_data
;
119 /* Create the per-BFD storage object for OBJFILE. If ABFD is not
120 NULL, and it already has a per-BFD storage object, use that.
121 Otherwise, allocate a new per-BFD storage object. If ABFD is not
122 NULL, the object is allocated on the BFD; otherwise it is allocated
123 on OBJFILE's obstack. Note that it is not safe to call this
124 multiple times for a given OBJFILE -- it can only be called when
125 allocating or re-initializing OBJFILE. */
127 static struct objfile_per_bfd_storage
*
128 get_objfile_bfd_data (struct objfile
*objfile
, struct bfd
*abfd
)
130 struct objfile_per_bfd_storage
*storage
= NULL
;
133 storage
= ((struct objfile_per_bfd_storage
*)
134 bfd_data (abfd
, objfiles_bfd_data
));
138 /* If the object requires gdb to do relocations, we simply fall
139 back to not sharing data across users. These cases are rare
140 enough that this seems reasonable. */
141 if (abfd
!= NULL
&& !gdb_bfd_requires_relocations (abfd
))
144 = ((struct objfile_per_bfd_storage
*)
145 bfd_alloc (abfd
, sizeof (struct objfile_per_bfd_storage
)));
146 set_bfd_data (abfd
, objfiles_bfd_data
, storage
);
150 storage
= (objfile_per_bfd_storage
*)
151 obstack_alloc (&objfile
->objfile_obstack
,
152 sizeof (objfile_per_bfd_storage
));
155 /* objfile_per_bfd_storage is not trivially constructible, must
156 call the ctor manually. */
157 storage
= new (storage
) objfile_per_bfd_storage ();
159 /* Look up the gdbarch associated with the BFD. */
161 storage
->gdbarch
= gdbarch_from_bfd (abfd
);
163 storage
->filename_cache
= bcache_xmalloc (NULL
, NULL
);
164 storage
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
165 storage
->language_of_main
= language_unknown
;
174 free_objfile_per_bfd_storage (struct objfile_per_bfd_storage
*storage
)
176 bcache_xfree (storage
->filename_cache
);
177 bcache_xfree (storage
->macro_cache
);
178 if (storage
->demangled_names_hash
)
179 htab_delete (storage
->demangled_names_hash
);
180 storage
->~objfile_per_bfd_storage ();
183 /* A wrapper for free_objfile_per_bfd_storage that can be passed as a
184 cleanup function to the BFD registry. */
187 objfile_bfd_data_free (struct bfd
*unused
, void *d
)
189 free_objfile_per_bfd_storage ((struct objfile_per_bfd_storage
*) d
);
192 /* See objfiles.h. */
195 set_objfile_per_bfd (struct objfile
*objfile
)
197 objfile
->per_bfd
= get_objfile_bfd_data (objfile
, objfile
->obfd
);
200 /* Set the objfile's per-BFD notion of the "main" name and
204 set_objfile_main_name (struct objfile
*objfile
,
205 const char *name
, enum language lang
)
207 if (objfile
->per_bfd
->name_of_main
== NULL
208 || strcmp (objfile
->per_bfd
->name_of_main
, name
) != 0)
209 objfile
->per_bfd
->name_of_main
210 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
, name
,
212 objfile
->per_bfd
->language_of_main
= lang
;
215 /* Helper structure to map blocks to static link properties in hash tables. */
217 struct static_link_htab_entry
219 const struct block
*block
;
220 const struct dynamic_prop
*static_link
;
223 /* Return a hash code for struct static_link_htab_entry *P. */
226 static_link_htab_entry_hash (const void *p
)
228 const struct static_link_htab_entry
*e
229 = (const struct static_link_htab_entry
*) p
;
231 return htab_hash_pointer (e
->block
);
234 /* Return whether P1 an P2 (pointers to struct static_link_htab_entry) are
235 mappings for the same block. */
238 static_link_htab_entry_eq (const void *p1
, const void *p2
)
240 const struct static_link_htab_entry
*e1
241 = (const struct static_link_htab_entry
*) p1
;
242 const struct static_link_htab_entry
*e2
243 = (const struct static_link_htab_entry
*) p2
;
245 return e1
->block
== e2
->block
;
248 /* Register STATIC_LINK as the static link for BLOCK, which is part of OBJFILE.
249 Must not be called more than once for each BLOCK. */
252 objfile_register_static_link (struct objfile
*objfile
,
253 const struct block
*block
,
254 const struct dynamic_prop
*static_link
)
257 struct static_link_htab_entry lookup_entry
;
258 struct static_link_htab_entry
*entry
;
260 if (objfile
->static_links
== NULL
)
261 objfile
->static_links
= htab_create_alloc
262 (1, &static_link_htab_entry_hash
, static_link_htab_entry_eq
, NULL
,
265 /* Create a slot for the mapping, make sure it's the first mapping for this
266 block and then create the mapping itself. */
267 lookup_entry
.block
= block
;
268 slot
= htab_find_slot (objfile
->static_links
, &lookup_entry
, INSERT
);
269 gdb_assert (*slot
== NULL
);
271 entry
= (struct static_link_htab_entry
*) obstack_alloc
272 (&objfile
->objfile_obstack
, sizeof (*entry
));
273 entry
->block
= block
;
274 entry
->static_link
= static_link
;
275 *slot
= (void *) entry
;
278 /* Look for a static link for BLOCK, which is part of OBJFILE. Return NULL if
281 const struct dynamic_prop
*
282 objfile_lookup_static_link (struct objfile
*objfile
,
283 const struct block
*block
)
285 struct static_link_htab_entry
*entry
;
286 struct static_link_htab_entry lookup_entry
;
288 if (objfile
->static_links
== NULL
)
290 lookup_entry
.block
= block
;
292 = (struct static_link_htab_entry
*) htab_find (objfile
->static_links
,
297 gdb_assert (entry
->block
== block
);
298 return entry
->static_link
;
303 /* Called via bfd_map_over_sections to build up the section table that
304 the objfile references. The objfile contains pointers to the start
305 of the table (objfile->sections) and to the first location after
306 the end of the table (objfile->sections_end). */
309 add_to_objfile_sections_full (struct bfd
*abfd
, struct bfd_section
*asect
,
310 struct objfile
*objfile
, int force
)
312 struct obj_section
*section
;
318 aflag
= bfd_get_section_flags (abfd
, asect
);
319 if (!(aflag
& SEC_ALLOC
))
323 section
= &objfile
->sections
[gdb_bfd_section_index (abfd
, asect
)];
324 section
->objfile
= objfile
;
325 section
->the_bfd_section
= asect
;
326 section
->ovly_mapped
= 0;
330 add_to_objfile_sections (struct bfd
*abfd
, struct bfd_section
*asect
,
333 add_to_objfile_sections_full (abfd
, asect
, (struct objfile
*) objfilep
, 0);
336 /* Builds a section table for OBJFILE.
338 Note that the OFFSET and OVLY_MAPPED in each table entry are
339 initialized to zero. */
342 build_objfile_section_table (struct objfile
*objfile
)
344 int count
= gdb_bfd_count_sections (objfile
->obfd
);
346 objfile
->sections
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
349 objfile
->sections_end
= (objfile
->sections
+ count
);
350 bfd_map_over_sections (objfile
->obfd
,
351 add_to_objfile_sections
, (void *) objfile
);
353 /* See gdb_bfd_section_index. */
354 add_to_objfile_sections_full (objfile
->obfd
, bfd_com_section_ptr
, objfile
, 1);
355 add_to_objfile_sections_full (objfile
->obfd
, bfd_und_section_ptr
, objfile
, 1);
356 add_to_objfile_sections_full (objfile
->obfd
, bfd_abs_section_ptr
, objfile
, 1);
357 add_to_objfile_sections_full (objfile
->obfd
, bfd_ind_section_ptr
, objfile
, 1);
360 /* Given a pointer to an initialized bfd (ABFD) and some flag bits
361 allocate a new objfile struct, fill it in as best we can, link it
362 into the list of all known objfiles, and return a pointer to the
365 NAME should contain original non-canonicalized filename or other
366 identifier as entered by user. If there is no better source use
367 bfd_get_filename (ABFD). NAME may be NULL only if ABFD is NULL.
368 NAME content is copied into returned objfile.
370 The FLAGS word contains various bits (OBJF_*) that can be taken as
371 requests for specific operations. Other bits like OBJF_SHARED are
372 simply copied through to the new objfile flags member. */
375 allocate_objfile (bfd
*abfd
, const char *name
, objfile_flags flags
)
377 struct objfile
*objfile
;
378 const char *expanded_name
;
380 objfile
= XCNEW (struct objfile
);
381 objfile
->psymbol_cache
= psymbol_bcache_init ();
382 /* We could use obstack_specify_allocation here instead, but
383 gdb_obstack.h specifies the alloc/dealloc functions. */
384 obstack_init (&objfile
->objfile_obstack
);
386 objfile_alloc_data (objfile
);
388 gdb::unique_xmalloc_ptr
<char> name_holder
;
391 gdb_assert (abfd
== NULL
);
392 gdb_assert ((flags
& OBJF_NOT_FILENAME
) != 0);
393 expanded_name
= "<<anonymous objfile>>";
395 else if ((flags
& OBJF_NOT_FILENAME
) != 0
396 || is_target_filename (name
))
397 expanded_name
= name
;
400 name_holder
= gdb_abspath (name
);
401 expanded_name
= name_holder
.get ();
403 objfile
->original_name
404 = (char *) obstack_copy0 (&objfile
->objfile_obstack
,
406 strlen (expanded_name
));
408 /* Update the per-objfile information that comes from the bfd, ensuring
409 that any data that is reference is saved in the per-objfile data
412 objfile
->obfd
= abfd
;
416 objfile
->mtime
= bfd_get_mtime (abfd
);
418 /* Build section table. */
419 build_objfile_section_table (objfile
);
422 objfile
->per_bfd
= get_objfile_bfd_data (objfile
, abfd
);
423 objfile
->pspace
= current_program_space
;
425 terminate_minimal_symbol_table (objfile
);
427 /* Initialize the section indexes for this objfile, so that we can
428 later detect if they are used w/o being properly assigned to. */
430 objfile
->sect_index_text
= -1;
431 objfile
->sect_index_data
= -1;
432 objfile
->sect_index_bss
= -1;
433 objfile
->sect_index_rodata
= -1;
435 /* Add this file onto the tail of the linked list of other such files. */
437 objfile
->next
= NULL
;
438 if (object_files
== NULL
)
439 object_files
= objfile
;
442 struct objfile
*last_one
;
444 for (last_one
= object_files
;
446 last_one
= last_one
->next
);
447 last_one
->next
= objfile
;
450 /* Save passed in flag bits. */
451 objfile
->flags
|= flags
;
453 /* Rebuild section map next time we need it. */
454 get_objfile_pspace_data (objfile
->pspace
)->new_objfiles_available
= 1;
459 /* Retrieve the gdbarch associated with OBJFILE. */
462 get_objfile_arch (const struct objfile
*objfile
)
464 return objfile
->per_bfd
->gdbarch
;
467 /* If there is a valid and known entry point, function fills *ENTRY_P with it
468 and returns non-zero; otherwise it returns zero. */
471 entry_point_address_query (CORE_ADDR
*entry_p
)
473 if (symfile_objfile
== NULL
|| !symfile_objfile
->per_bfd
->ei
.entry_point_p
)
476 *entry_p
= (symfile_objfile
->per_bfd
->ei
.entry_point
477 + ANOFFSET (symfile_objfile
->section_offsets
,
478 symfile_objfile
->per_bfd
->ei
.the_bfd_section_index
));
483 /* Get current entry point address. Call error if it is not known. */
486 entry_point_address (void)
490 if (!entry_point_address_query (&retval
))
491 error (_("Entry point address is not known."));
496 /* Iterator on PARENT and every separate debug objfile of PARENT.
497 The usage pattern is:
498 for (objfile = parent;
500 objfile = objfile_separate_debug_iterate (parent, objfile))
505 objfile_separate_debug_iterate (const struct objfile
*parent
,
506 const struct objfile
*objfile
)
510 /* If any, return the first child. */
511 res
= objfile
->separate_debug_objfile
;
515 /* Common case where there is no separate debug objfile. */
516 if (objfile
== parent
)
519 /* Return the brother if any. Note that we don't iterate on brothers of
521 res
= objfile
->separate_debug_objfile_link
;
525 for (res
= objfile
->separate_debug_objfile_backlink
;
527 res
= res
->separate_debug_objfile_backlink
)
529 gdb_assert (res
!= NULL
);
530 if (res
->separate_debug_objfile_link
)
531 return res
->separate_debug_objfile_link
;
536 /* Put one object file before a specified on in the global list.
537 This can be used to make sure an object file is destroyed before
538 another when using ALL_OBJFILES_SAFE to free all objfiles. */
540 put_objfile_before (struct objfile
*objfile
, struct objfile
*before_this
)
542 struct objfile
**objp
;
544 unlink_objfile (objfile
);
546 for (objp
= &object_files
; *objp
!= NULL
; objp
= &((*objp
)->next
))
548 if (*objp
== before_this
)
550 objfile
->next
= *objp
;
556 internal_error (__FILE__
, __LINE__
,
557 _("put_objfile_before: before objfile not in list"));
560 /* Unlink OBJFILE from the list of known objfiles, if it is found in the
563 It is not a bug, or error, to call this function if OBJFILE is not known
564 to be in the current list. This is done in the case of mapped objfiles,
565 for example, just to ensure that the mapped objfile doesn't appear twice
566 in the list. Since the list is threaded, linking in a mapped objfile
567 twice would create a circular list.
569 If OBJFILE turns out to be in the list, we zap it's NEXT pointer after
570 unlinking it, just to ensure that we have completely severed any linkages
571 between the OBJFILE and the list. */
574 unlink_objfile (struct objfile
*objfile
)
576 struct objfile
**objpp
;
578 for (objpp
= &object_files
; *objpp
!= NULL
; objpp
= &((*objpp
)->next
))
580 if (*objpp
== objfile
)
582 *objpp
= (*objpp
)->next
;
583 objfile
->next
= NULL
;
588 internal_error (__FILE__
, __LINE__
,
589 _("unlink_objfile: objfile already unlinked"));
592 /* Add OBJFILE as a separate debug objfile of PARENT. */
595 add_separate_debug_objfile (struct objfile
*objfile
, struct objfile
*parent
)
597 gdb_assert (objfile
&& parent
);
599 /* Must not be already in a list. */
600 gdb_assert (objfile
->separate_debug_objfile_backlink
== NULL
);
601 gdb_assert (objfile
->separate_debug_objfile_link
== NULL
);
602 gdb_assert (objfile
->separate_debug_objfile
== NULL
);
603 gdb_assert (parent
->separate_debug_objfile_backlink
== NULL
);
604 gdb_assert (parent
->separate_debug_objfile_link
== NULL
);
606 objfile
->separate_debug_objfile_backlink
= parent
;
607 objfile
->separate_debug_objfile_link
= parent
->separate_debug_objfile
;
608 parent
->separate_debug_objfile
= objfile
;
610 /* Put the separate debug object before the normal one, this is so that
611 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
612 put_objfile_before (objfile
, parent
);
615 /* Free all separate debug objfile of OBJFILE, but don't free OBJFILE
619 free_objfile_separate_debug (struct objfile
*objfile
)
621 struct objfile
*child
;
623 for (child
= objfile
->separate_debug_objfile
; child
;)
625 struct objfile
*next_child
= child
->separate_debug_objfile_link
;
626 free_objfile (child
);
631 /* Destroy an objfile and all the symtabs and psymtabs under it. */
634 free_objfile (struct objfile
*objfile
)
636 /* First notify observers that this objfile is about to be freed. */
637 observer_notify_free_objfile (objfile
);
639 /* Free all separate debug objfiles. */
640 free_objfile_separate_debug (objfile
);
642 if (objfile
->separate_debug_objfile_backlink
)
644 /* We freed the separate debug file, make sure the base objfile
645 doesn't reference it. */
646 struct objfile
*child
;
648 child
= objfile
->separate_debug_objfile_backlink
->separate_debug_objfile
;
650 if (child
== objfile
)
652 /* OBJFILE is the first child. */
653 objfile
->separate_debug_objfile_backlink
->separate_debug_objfile
=
654 objfile
->separate_debug_objfile_link
;
658 /* Find OBJFILE in the list. */
661 if (child
->separate_debug_objfile_link
== objfile
)
663 child
->separate_debug_objfile_link
=
664 objfile
->separate_debug_objfile_link
;
667 child
= child
->separate_debug_objfile_link
;
673 /* Remove any references to this objfile in the global value
675 preserve_values (objfile
);
677 /* It still may reference data modules have associated with the objfile and
678 the symbol file data. */
679 forget_cached_source_info_for_objfile (objfile
);
681 breakpoint_free_objfile (objfile
);
682 btrace_free_objfile (objfile
);
684 /* First do any symbol file specific actions required when we are
685 finished with a particular symbol file. Note that if the objfile
686 is using reusable symbol information (via mmalloc) then each of
687 these routines is responsible for doing the correct thing, either
688 freeing things which are valid only during this particular gdb
689 execution, or leaving them to be reused during the next one. */
691 if (objfile
->sf
!= NULL
)
693 (*objfile
->sf
->sym_finish
) (objfile
);
696 /* Discard any data modules have associated with the objfile. The function
697 still may reference objfile->obfd. */
698 objfile_free_data (objfile
);
701 gdb_bfd_unref (objfile
->obfd
);
703 free_objfile_per_bfd_storage (objfile
->per_bfd
);
705 /* Remove it from the chain of all objfiles. */
707 unlink_objfile (objfile
);
709 if (objfile
== symfile_objfile
)
710 symfile_objfile
= NULL
;
712 /* Before the symbol table code was redone to make it easier to
713 selectively load and remove information particular to a specific
714 linkage unit, gdb used to do these things whenever the monolithic
715 symbol table was blown away. How much still needs to be done
716 is unknown, but we play it safe for now and keep each action until
717 it is shown to be no longer needed. */
719 /* Not all our callers call clear_symtab_users (objfile_purge_solibs,
720 for example), so we need to call this here. */
721 clear_pc_function_cache ();
723 /* Clear globals which might have pointed into a removed objfile.
724 FIXME: It's not clear which of these are supposed to persist
725 between expressions and which ought to be reset each time. */
726 expression_context_block
= NULL
;
727 innermost_block
= NULL
;
729 /* Check to see if the current_source_symtab belongs to this objfile,
730 and if so, call clear_current_source_symtab_and_line. */
733 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
735 if (cursal
.symtab
&& SYMTAB_OBJFILE (cursal
.symtab
) == objfile
)
736 clear_current_source_symtab_and_line ();
739 if (objfile
->global_psymbols
.list
)
740 xfree (objfile
->global_psymbols
.list
);
741 if (objfile
->static_psymbols
.list
)
742 xfree (objfile
->static_psymbols
.list
);
743 /* Free the obstacks for non-reusable objfiles. */
744 psymbol_bcache_free (objfile
->psymbol_cache
);
745 obstack_free (&objfile
->objfile_obstack
, 0);
747 /* Rebuild section map next time we need it. */
748 get_objfile_pspace_data (objfile
->pspace
)->section_map_dirty
= 1;
750 /* Free the map for static links. There's no need to free static link
751 themselves since they were allocated on the objstack. */
752 if (objfile
->static_links
!= NULL
)
753 htab_delete (objfile
->static_links
);
755 /* The last thing we do is free the objfile struct itself. */
760 do_free_objfile_cleanup (void *obj
)
762 free_objfile ((struct objfile
*) obj
);
766 make_cleanup_free_objfile (struct objfile
*obj
)
768 return make_cleanup (do_free_objfile_cleanup
, obj
);
771 /* Free all the object files at once and clean up their users. */
774 free_all_objfiles (void)
776 struct objfile
*objfile
, *temp
;
779 /* Any objfile referencewould become stale. */
780 for (so
= master_so_list (); so
; so
= so
->next
)
781 gdb_assert (so
->objfile
== NULL
);
783 ALL_OBJFILES_SAFE (objfile
, temp
)
785 free_objfile (objfile
);
787 clear_symtab_users (0);
790 /* A helper function for objfile_relocate1 that relocates a single
794 relocate_one_symbol (struct symbol
*sym
, struct objfile
*objfile
,
795 struct section_offsets
*delta
)
797 fixup_symbol_section (sym
, objfile
);
799 /* The RS6000 code from which this was taken skipped
800 any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN.
801 But I'm leaving out that test, on the theory that
802 they can't possibly pass the tests below. */
803 if ((SYMBOL_CLASS (sym
) == LOC_LABEL
804 || SYMBOL_CLASS (sym
) == LOC_STATIC
)
805 && SYMBOL_SECTION (sym
) >= 0)
807 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (delta
, SYMBOL_SECTION (sym
));
811 /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS
812 entries in new_offsets. SEPARATE_DEBUG_OBJFILE is not touched here.
813 Return non-zero iff any change happened. */
816 objfile_relocate1 (struct objfile
*objfile
,
817 const struct section_offsets
*new_offsets
)
819 struct obj_section
*s
;
820 struct section_offsets
*delta
=
821 ((struct section_offsets
*)
822 alloca (SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
)));
825 int something_changed
= 0;
827 for (i
= 0; i
< objfile
->num_sections
; ++i
)
830 ANOFFSET (new_offsets
, i
) - ANOFFSET (objfile
->section_offsets
, i
);
831 if (ANOFFSET (delta
, i
) != 0)
832 something_changed
= 1;
834 if (!something_changed
)
837 /* OK, get all the symtabs. */
839 struct compunit_symtab
*cust
;
842 ALL_OBJFILE_FILETABS (objfile
, cust
, s
)
847 /* First the line table. */
848 l
= SYMTAB_LINETABLE (s
);
851 for (i
= 0; i
< l
->nitems
; ++i
)
852 l
->item
[i
].pc
+= ANOFFSET (delta
,
853 COMPUNIT_BLOCK_LINE_SECTION
858 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
860 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (cust
);
861 int block_line_section
= COMPUNIT_BLOCK_LINE_SECTION (cust
);
863 if (BLOCKVECTOR_MAP (bv
))
864 addrmap_relocate (BLOCKVECTOR_MAP (bv
),
865 ANOFFSET (delta
, block_line_section
));
867 for (i
= 0; i
< BLOCKVECTOR_NBLOCKS (bv
); ++i
)
871 struct dict_iterator iter
;
873 b
= BLOCKVECTOR_BLOCK (bv
, i
);
874 BLOCK_START (b
) += ANOFFSET (delta
, block_line_section
);
875 BLOCK_END (b
) += ANOFFSET (delta
, block_line_section
);
877 /* We only want to iterate over the local symbols, not any
878 symbols in included symtabs. */
879 ALL_DICT_SYMBOLS (BLOCK_DICT (b
), iter
, sym
)
881 relocate_one_symbol (sym
, objfile
, delta
);
887 /* Relocate isolated symbols. */
891 for (iter
= objfile
->template_symbols
; iter
; iter
= iter
->hash_next
)
892 relocate_one_symbol (iter
, objfile
, delta
);
895 if (objfile
->psymtabs_addrmap
)
896 addrmap_relocate (objfile
->psymtabs_addrmap
,
897 ANOFFSET (delta
, SECT_OFF_TEXT (objfile
)));
900 objfile
->sf
->qf
->relocate (objfile
, new_offsets
, delta
);
905 for (i
= 0; i
< objfile
->num_sections
; ++i
)
906 (objfile
->section_offsets
)->offsets
[i
] = ANOFFSET (new_offsets
, i
);
909 /* Rebuild section map next time we need it. */
910 get_objfile_pspace_data (objfile
->pspace
)->section_map_dirty
= 1;
912 /* Update the table in exec_ops, used to read memory. */
913 ALL_OBJFILE_OSECTIONS (objfile
, s
)
915 int idx
= s
- objfile
->sections
;
917 exec_set_section_address (bfd_get_filename (objfile
->obfd
), idx
,
918 obj_section_addr (s
));
925 /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS
926 entries in new_offsets. Process also OBJFILE's SEPARATE_DEBUG_OBJFILEs.
928 The number and ordering of sections does differ between the two objfiles.
929 Only their names match. Also the file offsets will differ (objfile being
930 possibly prelinked but separate_debug_objfile is probably not prelinked) but
931 the in-memory absolute address as specified by NEW_OFFSETS must match both
935 objfile_relocate (struct objfile
*objfile
,
936 const struct section_offsets
*new_offsets
)
938 struct objfile
*debug_objfile
;
941 changed
|= objfile_relocate1 (objfile
, new_offsets
);
943 for (debug_objfile
= objfile
->separate_debug_objfile
;
945 debug_objfile
= objfile_separate_debug_iterate (objfile
, debug_objfile
))
947 struct section_addr_info
*objfile_addrs
;
948 struct cleanup
*my_cleanups
;
950 objfile_addrs
= build_section_addr_info_from_objfile (objfile
);
951 my_cleanups
= make_cleanup (xfree
, objfile_addrs
);
953 /* Here OBJFILE_ADDRS contain the correct absolute addresses, the
954 relative ones must be already created according to debug_objfile. */
956 addr_info_make_relative (objfile_addrs
, debug_objfile
->obfd
);
958 gdb_assert (debug_objfile
->num_sections
959 == gdb_bfd_count_sections (debug_objfile
->obfd
));
960 std::vector
<struct section_offsets
>
961 new_debug_offsets (SIZEOF_N_SECTION_OFFSETS (debug_objfile
->num_sections
));
962 relative_addr_info_to_section_offsets (new_debug_offsets
.data (),
963 debug_objfile
->num_sections
,
966 changed
|= objfile_relocate1 (debug_objfile
, new_debug_offsets
.data ());
968 do_cleanups (my_cleanups
);
971 /* Relocate breakpoints as necessary, after things are relocated. */
973 breakpoint_re_set ();
976 /* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is
978 Return non-zero iff any change happened. */
981 objfile_rebase1 (struct objfile
*objfile
, CORE_ADDR slide
)
983 struct section_offsets
*new_offsets
=
984 ((struct section_offsets
*)
985 alloca (SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
)));
988 for (i
= 0; i
< objfile
->num_sections
; ++i
)
989 new_offsets
->offsets
[i
] = slide
;
991 return objfile_relocate1 (objfile
, new_offsets
);
994 /* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's
995 SEPARATE_DEBUG_OBJFILEs. */
998 objfile_rebase (struct objfile
*objfile
, CORE_ADDR slide
)
1000 struct objfile
*debug_objfile
;
1003 changed
|= objfile_rebase1 (objfile
, slide
);
1005 for (debug_objfile
= objfile
->separate_debug_objfile
;
1007 debug_objfile
= objfile_separate_debug_iterate (objfile
, debug_objfile
))
1008 changed
|= objfile_rebase1 (debug_objfile
, slide
);
1010 /* Relocate breakpoints as necessary, after things are relocated. */
1012 breakpoint_re_set ();
1015 /* Return non-zero if OBJFILE has partial symbols. */
1018 objfile_has_partial_symbols (struct objfile
*objfile
)
1023 /* If we have not read psymbols, but we have a function capable of reading
1024 them, then that is an indication that they are in fact available. Without
1025 this function the symbols may have been already read in but they also may
1026 not be present in this objfile. */
1027 if ((objfile
->flags
& OBJF_PSYMTABS_READ
) == 0
1028 && objfile
->sf
->sym_read_psymbols
!= NULL
)
1031 return objfile
->sf
->qf
->has_symbols (objfile
);
1034 /* Return non-zero if OBJFILE has full symbols. */
1037 objfile_has_full_symbols (struct objfile
*objfile
)
1039 return objfile
->compunit_symtabs
!= NULL
;
1042 /* Return non-zero if OBJFILE has full or partial symbols, either directly
1043 or through a separate debug file. */
1046 objfile_has_symbols (struct objfile
*objfile
)
1050 for (o
= objfile
; o
; o
= objfile_separate_debug_iterate (objfile
, o
))
1051 if (objfile_has_partial_symbols (o
) || objfile_has_full_symbols (o
))
1057 /* Many places in gdb want to test just to see if we have any partial
1058 symbols available. This function returns zero if none are currently
1059 available, nonzero otherwise. */
1062 have_partial_symbols (void)
1064 struct objfile
*ofp
;
1068 if (objfile_has_partial_symbols (ofp
))
1074 /* Many places in gdb want to test just to see if we have any full
1075 symbols available. This function returns zero if none are currently
1076 available, nonzero otherwise. */
1079 have_full_symbols (void)
1081 struct objfile
*ofp
;
1085 if (objfile_has_full_symbols (ofp
))
1092 /* This operations deletes all objfile entries that represent solibs that
1093 weren't explicitly loaded by the user, via e.g., the add-symbol-file
1097 objfile_purge_solibs (void)
1099 struct objfile
*objf
;
1100 struct objfile
*temp
;
1102 ALL_OBJFILES_SAFE (objf
, temp
)
1104 /* We assume that the solib package has been purged already, or will
1107 if (!(objf
->flags
& OBJF_USERLOADED
) && (objf
->flags
& OBJF_SHARED
))
1108 free_objfile (objf
);
1113 /* Many places in gdb want to test just to see if we have any minimal
1114 symbols available. This function returns zero if none are currently
1115 available, nonzero otherwise. */
1118 have_minimal_symbols (void)
1120 struct objfile
*ofp
;
1124 if (ofp
->per_bfd
->minimal_symbol_count
> 0)
1132 /* Qsort comparison function. */
1135 qsort_cmp (const void *a
, const void *b
)
1137 const struct obj_section
*sect1
= *(const struct obj_section
**) a
;
1138 const struct obj_section
*sect2
= *(const struct obj_section
**) b
;
1139 const CORE_ADDR sect1_addr
= obj_section_addr (sect1
);
1140 const CORE_ADDR sect2_addr
= obj_section_addr (sect2
);
1142 if (sect1_addr
< sect2_addr
)
1144 else if (sect1_addr
> sect2_addr
)
1148 /* Sections are at the same address. This could happen if
1149 A) we have an objfile and a separate debuginfo.
1150 B) we are confused, and have added sections without proper relocation,
1151 or something like that. */
1153 const struct objfile
*const objfile1
= sect1
->objfile
;
1154 const struct objfile
*const objfile2
= sect2
->objfile
;
1156 if (objfile1
->separate_debug_objfile
== objfile2
1157 || objfile2
->separate_debug_objfile
== objfile1
)
1159 /* Case A. The ordering doesn't matter: separate debuginfo files
1160 will be filtered out later. */
1165 /* Case B. Maintain stable sort order, so bugs in GDB are easier to
1166 triage. This section could be slow (since we iterate over all
1167 objfiles in each call to qsort_cmp), but this shouldn't happen
1168 very often (GDB is already in a confused state; one hopes this
1169 doesn't happen at all). If you discover that significant time is
1170 spent in the loops below, do 'set complaints 100' and examine the
1171 resulting complaints. */
1173 if (objfile1
== objfile2
)
1175 /* Both sections came from the same objfile. We are really confused.
1176 Sort on sequence order of sections within the objfile. */
1178 const struct obj_section
*osect
;
1180 ALL_OBJFILE_OSECTIONS (objfile1
, osect
)
1183 else if (osect
== sect2
)
1186 /* We should have found one of the sections before getting here. */
1187 gdb_assert_not_reached ("section not found");
1191 /* Sort on sequence number of the objfile in the chain. */
1193 const struct objfile
*objfile
;
1195 ALL_OBJFILES (objfile
)
1196 if (objfile
== objfile1
)
1198 else if (objfile
== objfile2
)
1201 /* We should have found one of the objfiles before getting here. */
1202 gdb_assert_not_reached ("objfile not found");
1207 gdb_assert_not_reached ("unexpected code path");
1211 /* Select "better" obj_section to keep. We prefer the one that came from
1212 the real object, rather than the one from separate debuginfo.
1213 Most of the time the two sections are exactly identical, but with
1214 prelinking the .rel.dyn section in the real object may have different
1217 static struct obj_section
*
1218 preferred_obj_section (struct obj_section
*a
, struct obj_section
*b
)
1220 gdb_assert (obj_section_addr (a
) == obj_section_addr (b
));
1221 gdb_assert ((a
->objfile
->separate_debug_objfile
== b
->objfile
)
1222 || (b
->objfile
->separate_debug_objfile
== a
->objfile
));
1223 gdb_assert ((a
->objfile
->separate_debug_objfile_backlink
== b
->objfile
)
1224 || (b
->objfile
->separate_debug_objfile_backlink
== a
->objfile
));
1226 if (a
->objfile
->separate_debug_objfile
!= NULL
)
1231 /* Return 1 if SECTION should be inserted into the section map.
1232 We want to insert only non-overlay and non-TLS section. */
1235 insert_section_p (const struct bfd
*abfd
,
1236 const struct bfd_section
*section
)
1238 const bfd_vma lma
= bfd_section_lma (abfd
, section
);
1240 if (overlay_debugging
&& lma
!= 0 && lma
!= bfd_section_vma (abfd
, section
)
1241 && (bfd_get_file_flags (abfd
) & BFD_IN_MEMORY
) == 0)
1242 /* This is an overlay section. IN_MEMORY check is needed to avoid
1243 discarding sections from the "system supplied DSO" (aka vdso)
1244 on some Linux systems (e.g. Fedora 11). */
1246 if ((bfd_get_section_flags (abfd
, section
) & SEC_THREAD_LOCAL
) != 0)
1247 /* This is a TLS section. */
1253 /* Filter out overlapping sections where one section came from the real
1254 objfile, and the other from a separate debuginfo file.
1255 Return the size of table after redundant sections have been eliminated. */
1258 filter_debuginfo_sections (struct obj_section
**map
, int map_size
)
1262 for (i
= 0, j
= 0; i
< map_size
- 1; i
++)
1264 struct obj_section
*const sect1
= map
[i
];
1265 struct obj_section
*const sect2
= map
[i
+ 1];
1266 const struct objfile
*const objfile1
= sect1
->objfile
;
1267 const struct objfile
*const objfile2
= sect2
->objfile
;
1268 const CORE_ADDR sect1_addr
= obj_section_addr (sect1
);
1269 const CORE_ADDR sect2_addr
= obj_section_addr (sect2
);
1271 if (sect1_addr
== sect2_addr
1272 && (objfile1
->separate_debug_objfile
== objfile2
1273 || objfile2
->separate_debug_objfile
== objfile1
))
1275 map
[j
++] = preferred_obj_section (sect1
, sect2
);
1284 gdb_assert (i
== map_size
- 1);
1288 /* The map should not have shrunk to less than half the original size. */
1289 gdb_assert (map_size
/ 2 <= j
);
1294 /* Filter out overlapping sections, issuing a warning if any are found.
1295 Overlapping sections could really be overlay sections which we didn't
1296 classify as such in insert_section_p, or we could be dealing with a
1300 filter_overlapping_sections (struct obj_section
**map
, int map_size
)
1304 for (i
= 0, j
= 0; i
< map_size
- 1; )
1309 for (k
= i
+ 1; k
< map_size
; k
++)
1311 struct obj_section
*const sect1
= map
[i
];
1312 struct obj_section
*const sect2
= map
[k
];
1313 const CORE_ADDR sect1_addr
= obj_section_addr (sect1
);
1314 const CORE_ADDR sect2_addr
= obj_section_addr (sect2
);
1315 const CORE_ADDR sect1_endaddr
= obj_section_endaddr (sect1
);
1317 gdb_assert (sect1_addr
<= sect2_addr
);
1319 if (sect1_endaddr
<= sect2_addr
)
1323 /* We have an overlap. Report it. */
1325 struct objfile
*const objf1
= sect1
->objfile
;
1326 struct objfile
*const objf2
= sect2
->objfile
;
1328 const struct bfd_section
*const bfds1
= sect1
->the_bfd_section
;
1329 const struct bfd_section
*const bfds2
= sect2
->the_bfd_section
;
1331 const CORE_ADDR sect2_endaddr
= obj_section_endaddr (sect2
);
1333 struct gdbarch
*const gdbarch
= get_objfile_arch (objf1
);
1335 complaint (&symfile_complaints
,
1336 _("unexpected overlap between:\n"
1337 " (A) section `%s' from `%s' [%s, %s)\n"
1338 " (B) section `%s' from `%s' [%s, %s).\n"
1339 "Will ignore section B"),
1340 bfd_section_name (abfd1
, bfds1
), objfile_name (objf1
),
1341 paddress (gdbarch
, sect1_addr
),
1342 paddress (gdbarch
, sect1_endaddr
),
1343 bfd_section_name (abfd2
, bfds2
), objfile_name (objf2
),
1344 paddress (gdbarch
, sect2_addr
),
1345 paddress (gdbarch
, sect2_endaddr
));
1353 gdb_assert (i
== map_size
- 1);
1361 /* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any
1362 TLS, overlay and overlapping sections. */
1365 update_section_map (struct program_space
*pspace
,
1366 struct obj_section
***pmap
, int *pmap_size
)
1368 struct objfile_pspace_info
*pspace_info
;
1369 int alloc_size
, map_size
, i
;
1370 struct obj_section
*s
, **map
;
1371 struct objfile
*objfile
;
1373 pspace_info
= get_objfile_pspace_data (pspace
);
1374 gdb_assert (pspace_info
->section_map_dirty
!= 0
1375 || pspace_info
->new_objfiles_available
!= 0);
1381 ALL_PSPACE_OBJFILES (pspace
, objfile
)
1382 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1383 if (insert_section_p (objfile
->obfd
, s
->the_bfd_section
))
1386 /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */
1387 if (alloc_size
== 0)
1394 map
= XNEWVEC (struct obj_section
*, alloc_size
);
1397 ALL_PSPACE_OBJFILES (pspace
, objfile
)
1398 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1399 if (insert_section_p (objfile
->obfd
, s
->the_bfd_section
))
1402 qsort (map
, alloc_size
, sizeof (*map
), qsort_cmp
);
1403 map_size
= filter_debuginfo_sections(map
, alloc_size
);
1404 map_size
= filter_overlapping_sections(map
, map_size
);
1406 if (map_size
< alloc_size
)
1407 /* Some sections were eliminated. Trim excess space. */
1408 map
= XRESIZEVEC (struct obj_section
*, map
, map_size
);
1410 gdb_assert (alloc_size
== map_size
);
1413 *pmap_size
= map_size
;
1416 /* Bsearch comparison function. */
1419 bsearch_cmp (const void *key
, const void *elt
)
1421 const CORE_ADDR pc
= *(CORE_ADDR
*) key
;
1422 const struct obj_section
*section
= *(const struct obj_section
**) elt
;
1424 if (pc
< obj_section_addr (section
))
1426 if (pc
< obj_section_endaddr (section
))
1431 /* Returns a section whose range includes PC or NULL if none found. */
1433 struct obj_section
*
1434 find_pc_section (CORE_ADDR pc
)
1436 struct objfile_pspace_info
*pspace_info
;
1437 struct obj_section
*s
, **sp
;
1439 /* Check for mapped overlay section first. */
1440 s
= find_pc_mapped_section (pc
);
1444 pspace_info
= get_objfile_pspace_data (current_program_space
);
1445 if (pspace_info
->section_map_dirty
1446 || (pspace_info
->new_objfiles_available
1447 && !pspace_info
->inhibit_updates
))
1449 update_section_map (current_program_space
,
1450 &pspace_info
->sections
,
1451 &pspace_info
->num_sections
);
1453 /* Don't need updates to section map until objfiles are added,
1454 removed or relocated. */
1455 pspace_info
->new_objfiles_available
= 0;
1456 pspace_info
->section_map_dirty
= 0;
1459 /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to
1460 bsearch be non-NULL. */
1461 if (pspace_info
->sections
== NULL
)
1463 gdb_assert (pspace_info
->num_sections
== 0);
1467 sp
= (struct obj_section
**) bsearch (&pc
,
1468 pspace_info
->sections
,
1469 pspace_info
->num_sections
,
1470 sizeof (*pspace_info
->sections
),
1478 /* Return non-zero if PC is in a section called NAME. */
1481 pc_in_section (CORE_ADDR pc
, const char *name
)
1483 struct obj_section
*s
;
1486 s
= find_pc_section (pc
);
1489 && s
->the_bfd_section
->name
!= NULL
1490 && strcmp (s
->the_bfd_section
->name
, name
) == 0);
1495 /* Set section_map_dirty so section map will be rebuilt next time it
1496 is used. Called by reread_symbols. */
1499 objfiles_changed (void)
1501 /* Rebuild section map next time we need it. */
1502 get_objfile_pspace_data (current_program_space
)->section_map_dirty
= 1;
1505 /* See comments in objfiles.h. */
1508 inhibit_section_map_updates (struct program_space
*pspace
)
1510 get_objfile_pspace_data (pspace
)->inhibit_updates
= 1;
1513 /* See comments in objfiles.h. */
1516 resume_section_map_updates (struct program_space
*pspace
)
1518 get_objfile_pspace_data (pspace
)->inhibit_updates
= 0;
1521 /* See comments in objfiles.h. */
1524 resume_section_map_updates_cleanup (void *arg
)
1526 resume_section_map_updates ((struct program_space
*) arg
);
1529 /* Return 1 if ADDR maps into one of the sections of OBJFILE and 0
1533 is_addr_in_objfile (CORE_ADDR addr
, const struct objfile
*objfile
)
1535 struct obj_section
*osect
;
1537 if (objfile
== NULL
)
1540 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
1542 if (section_is_overlay (osect
) && !section_is_mapped (osect
))
1545 if (obj_section_addr (osect
) <= addr
1546 && addr
< obj_section_endaddr (osect
))
1553 shared_objfile_contains_address_p (struct program_space
*pspace
,
1556 struct objfile
*objfile
;
1558 ALL_PSPACE_OBJFILES (pspace
, objfile
)
1560 if ((objfile
->flags
& OBJF_SHARED
) != 0
1561 && is_addr_in_objfile (address
, objfile
))
1568 /* The default implementation for the "iterate_over_objfiles_in_search_order"
1569 gdbarch method. It is equivalent to use the ALL_OBJFILES macro,
1570 searching the objfiles in the order they are stored internally,
1571 ignoring CURRENT_OBJFILE.
1573 On most platorms, it should be close enough to doing the best
1574 we can without some knowledge specific to the architecture. */
1577 default_iterate_over_objfiles_in_search_order
1578 (struct gdbarch
*gdbarch
,
1579 iterate_over_objfiles_in_search_order_cb_ftype
*cb
,
1580 void *cb_data
, struct objfile
*current_objfile
)
1583 struct objfile
*objfile
;
1585 ALL_OBJFILES (objfile
)
1587 stop
= cb (objfile
, cb_data
);
1593 /* See objfiles.h. */
1596 objfile_name (const struct objfile
*objfile
)
1598 if (objfile
->obfd
!= NULL
)
1599 return bfd_get_filename (objfile
->obfd
);
1601 return objfile
->original_name
;
1604 /* See objfiles.h. */
1607 objfile_filename (const struct objfile
*objfile
)
1609 if (objfile
->obfd
!= NULL
)
1610 return bfd_get_filename (objfile
->obfd
);
1615 /* See objfiles.h. */
1618 objfile_debug_name (const struct objfile
*objfile
)
1620 return lbasename (objfile
->original_name
);
1623 /* See objfiles.h. */
1626 objfile_flavour_name (struct objfile
*objfile
)
1628 if (objfile
->obfd
!= NULL
)
1629 return bfd_flavour_name (bfd_get_flavour (objfile
->obfd
));
1634 _initialize_objfiles (void)
1636 objfiles_pspace_data
1637 = register_program_space_data_with_cleanup (NULL
,
1638 objfiles_pspace_data_cleanup
);
1640 objfiles_bfd_data
= register_bfd_data_with_cleanup (NULL
,
1641 objfile_bfd_data_free
);