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 initialize the new objfile as best we can and link it into the list
362 of all known objfiles.
364 NAME should contain original non-canonicalized filename or other
365 identifier as entered by user. If there is no better source use
366 bfd_get_filename (ABFD). NAME may be NULL only if ABFD is NULL.
367 NAME content is copied into returned objfile.
369 The FLAGS word contains various bits (OBJF_*) that can be taken as
370 requests for specific operations. Other bits like OBJF_SHARED are
371 simply copied through to the new objfile flags member. */
373 objfile::objfile (bfd
*abfd
, const char *name
, objfile_flags flags_
)
375 pspace (current_program_space
),
377 psymbol_cache (psymbol_bcache_init ())
379 const char *expanded_name
;
381 /* We could use obstack_specify_allocation here instead, but
382 gdb_obstack.h specifies the alloc/dealloc functions. */
383 obstack_init (&objfile_obstack
);
385 objfile_alloc_data (this);
387 gdb::unique_xmalloc_ptr
<char> name_holder
;
390 gdb_assert (abfd
== NULL
);
391 gdb_assert ((flags
& OBJF_NOT_FILENAME
) != 0);
392 expanded_name
= "<<anonymous objfile>>";
394 else if ((flags
& OBJF_NOT_FILENAME
) != 0
395 || is_target_filename (name
))
396 expanded_name
= name
;
399 name_holder
= gdb_abspath (name
);
400 expanded_name
= name_holder
.get ();
403 = (char *) obstack_copy0 (&objfile_obstack
,
405 strlen (expanded_name
));
407 /* Update the per-objfile information that comes from the bfd, ensuring
408 that any data that is reference is saved in the per-objfile data
414 mtime
= bfd_get_mtime (abfd
);
416 /* Build section table. */
417 build_objfile_section_table (this);
420 per_bfd
= get_objfile_bfd_data (this, abfd
);
422 terminate_minimal_symbol_table (this);
424 /* Add this file onto the tail of the linked list of other such files. */
426 if (object_files
== NULL
)
430 struct objfile
*last_one
;
432 for (last_one
= object_files
;
434 last_one
= last_one
->next
);
435 last_one
->next
= this;
438 /* Rebuild section map next time we need it. */
439 get_objfile_pspace_data (pspace
)->new_objfiles_available
= 1;
442 /* Retrieve the gdbarch associated with OBJFILE. */
445 get_objfile_arch (const struct objfile
*objfile
)
447 return objfile
->per_bfd
->gdbarch
;
450 /* If there is a valid and known entry point, function fills *ENTRY_P with it
451 and returns non-zero; otherwise it returns zero. */
454 entry_point_address_query (CORE_ADDR
*entry_p
)
456 if (symfile_objfile
== NULL
|| !symfile_objfile
->per_bfd
->ei
.entry_point_p
)
459 *entry_p
= (symfile_objfile
->per_bfd
->ei
.entry_point
460 + ANOFFSET (symfile_objfile
->section_offsets
,
461 symfile_objfile
->per_bfd
->ei
.the_bfd_section_index
));
466 /* Get current entry point address. Call error if it is not known. */
469 entry_point_address (void)
473 if (!entry_point_address_query (&retval
))
474 error (_("Entry point address is not known."));
479 /* Iterator on PARENT and every separate debug objfile of PARENT.
480 The usage pattern is:
481 for (objfile = parent;
483 objfile = objfile_separate_debug_iterate (parent, objfile))
488 objfile_separate_debug_iterate (const struct objfile
*parent
,
489 const struct objfile
*objfile
)
493 /* If any, return the first child. */
494 res
= objfile
->separate_debug_objfile
;
498 /* Common case where there is no separate debug objfile. */
499 if (objfile
== parent
)
502 /* Return the brother if any. Note that we don't iterate on brothers of
504 res
= objfile
->separate_debug_objfile_link
;
508 for (res
= objfile
->separate_debug_objfile_backlink
;
510 res
= res
->separate_debug_objfile_backlink
)
512 gdb_assert (res
!= NULL
);
513 if (res
->separate_debug_objfile_link
)
514 return res
->separate_debug_objfile_link
;
519 /* Put one object file before a specified on in the global list.
520 This can be used to make sure an object file is destroyed before
521 another when using ALL_OBJFILES_SAFE to free all objfiles. */
523 put_objfile_before (struct objfile
*objfile
, struct objfile
*before_this
)
525 struct objfile
**objp
;
527 unlink_objfile (objfile
);
529 for (objp
= &object_files
; *objp
!= NULL
; objp
= &((*objp
)->next
))
531 if (*objp
== before_this
)
533 objfile
->next
= *objp
;
539 internal_error (__FILE__
, __LINE__
,
540 _("put_objfile_before: before objfile not in list"));
543 /* Unlink OBJFILE from the list of known objfiles, if it is found in the
546 It is not a bug, or error, to call this function if OBJFILE is not known
547 to be in the current list. This is done in the case of mapped objfiles,
548 for example, just to ensure that the mapped objfile doesn't appear twice
549 in the list. Since the list is threaded, linking in a mapped objfile
550 twice would create a circular list.
552 If OBJFILE turns out to be in the list, we zap it's NEXT pointer after
553 unlinking it, just to ensure that we have completely severed any linkages
554 between the OBJFILE and the list. */
557 unlink_objfile (struct objfile
*objfile
)
559 struct objfile
**objpp
;
561 for (objpp
= &object_files
; *objpp
!= NULL
; objpp
= &((*objpp
)->next
))
563 if (*objpp
== objfile
)
565 *objpp
= (*objpp
)->next
;
566 objfile
->next
= NULL
;
571 internal_error (__FILE__
, __LINE__
,
572 _("unlink_objfile: objfile already unlinked"));
575 /* Add OBJFILE as a separate debug objfile of PARENT. */
578 add_separate_debug_objfile (struct objfile
*objfile
, struct objfile
*parent
)
580 gdb_assert (objfile
&& parent
);
582 /* Must not be already in a list. */
583 gdb_assert (objfile
->separate_debug_objfile_backlink
== NULL
);
584 gdb_assert (objfile
->separate_debug_objfile_link
== NULL
);
585 gdb_assert (objfile
->separate_debug_objfile
== NULL
);
586 gdb_assert (parent
->separate_debug_objfile_backlink
== NULL
);
587 gdb_assert (parent
->separate_debug_objfile_link
== NULL
);
589 objfile
->separate_debug_objfile_backlink
= parent
;
590 objfile
->separate_debug_objfile_link
= parent
->separate_debug_objfile
;
591 parent
->separate_debug_objfile
= objfile
;
593 /* Put the separate debug object before the normal one, this is so that
594 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
595 put_objfile_before (objfile
, parent
);
598 /* Free all separate debug objfile of OBJFILE, but don't free OBJFILE
602 free_objfile_separate_debug (struct objfile
*objfile
)
604 struct objfile
*child
;
606 for (child
= objfile
->separate_debug_objfile
; child
;)
608 struct objfile
*next_child
= child
->separate_debug_objfile_link
;
614 /* Destroy an objfile and all the symtabs and psymtabs under it. */
618 /* First notify observers that this objfile is about to be freed. */
619 observer_notify_free_objfile (this);
621 /* Free all separate debug objfiles. */
622 free_objfile_separate_debug (this);
624 if (separate_debug_objfile_backlink
)
626 /* We freed the separate debug file, make sure the base objfile
627 doesn't reference it. */
628 struct objfile
*child
;
630 child
= separate_debug_objfile_backlink
->separate_debug_objfile
;
634 /* THIS is the first child. */
635 separate_debug_objfile_backlink
->separate_debug_objfile
=
636 separate_debug_objfile_link
;
640 /* Find THIS in the list. */
643 if (child
->separate_debug_objfile_link
== this)
645 child
->separate_debug_objfile_link
=
646 separate_debug_objfile_link
;
649 child
= child
->separate_debug_objfile_link
;
655 /* Remove any references to this objfile in the global value
657 preserve_values (this);
659 /* It still may reference data modules have associated with the objfile and
660 the symbol file data. */
661 forget_cached_source_info_for_objfile (this);
663 breakpoint_free_objfile (this);
664 btrace_free_objfile (this);
666 /* First do any symbol file specific actions required when we are
667 finished with a particular symbol file. Note that if the objfile
668 is using reusable symbol information (via mmalloc) then each of
669 these routines is responsible for doing the correct thing, either
670 freeing things which are valid only during this particular gdb
671 execution, or leaving them to be reused during the next one. */
674 (*sf
->sym_finish
) (this);
676 /* Discard any data modules have associated with the objfile. The function
677 still may reference obfd. */
678 objfile_free_data (this);
681 gdb_bfd_unref (obfd
);
683 free_objfile_per_bfd_storage (per_bfd
);
685 /* Remove it from the chain of all objfiles. */
687 unlink_objfile (this);
689 if (this == symfile_objfile
)
690 symfile_objfile
= NULL
;
692 /* Before the symbol table code was redone to make it easier to
693 selectively load and remove information particular to a specific
694 linkage unit, gdb used to do these things whenever the monolithic
695 symbol table was blown away. How much still needs to be done
696 is unknown, but we play it safe for now and keep each action until
697 it is shown to be no longer needed. */
699 /* Not all our callers call clear_symtab_users (objfile_purge_solibs,
700 for example), so we need to call this here. */
701 clear_pc_function_cache ();
703 /* Clear globals which might have pointed into a removed objfile.
704 FIXME: It's not clear which of these are supposed to persist
705 between expressions and which ought to be reset each time. */
706 expression_context_block
= NULL
;
707 innermost_block
= NULL
;
709 /* Check to see if the current_source_symtab belongs to this objfile,
710 and if so, call clear_current_source_symtab_and_line. */
713 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
715 if (cursal
.symtab
&& SYMTAB_OBJFILE (cursal
.symtab
) == this)
716 clear_current_source_symtab_and_line ();
719 if (global_psymbols
.list
)
720 xfree (global_psymbols
.list
);
721 if (static_psymbols
.list
)
722 xfree (static_psymbols
.list
);
723 /* Free the obstacks for non-reusable objfiles. */
724 psymbol_bcache_free (psymbol_cache
);
725 obstack_free (&objfile_obstack
, 0);
727 /* Rebuild section map next time we need it. */
728 get_objfile_pspace_data (pspace
)->section_map_dirty
= 1;
730 /* Free the map for static links. There's no need to free static link
731 themselves since they were allocated on the objstack. */
732 if (static_links
!= NULL
)
733 htab_delete (static_links
);
737 do_free_objfile_cleanup (void *obj
)
739 delete (struct objfile
*) obj
;
743 make_cleanup_free_objfile (struct objfile
*obj
)
745 return make_cleanup (do_free_objfile_cleanup
, obj
);
748 /* Free all the object files at once and clean up their users. */
751 free_all_objfiles (void)
753 struct objfile
*objfile
, *temp
;
756 /* Any objfile referencewould become stale. */
757 for (so
= master_so_list (); so
; so
= so
->next
)
758 gdb_assert (so
->objfile
== NULL
);
760 ALL_OBJFILES_SAFE (objfile
, temp
)
764 clear_symtab_users (0);
767 /* A helper function for objfile_relocate1 that relocates a single
771 relocate_one_symbol (struct symbol
*sym
, struct objfile
*objfile
,
772 struct section_offsets
*delta
)
774 fixup_symbol_section (sym
, objfile
);
776 /* The RS6000 code from which this was taken skipped
777 any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN.
778 But I'm leaving out that test, on the theory that
779 they can't possibly pass the tests below. */
780 if ((SYMBOL_CLASS (sym
) == LOC_LABEL
781 || SYMBOL_CLASS (sym
) == LOC_STATIC
)
782 && SYMBOL_SECTION (sym
) >= 0)
784 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (delta
, SYMBOL_SECTION (sym
));
788 /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS
789 entries in new_offsets. SEPARATE_DEBUG_OBJFILE is not touched here.
790 Return non-zero iff any change happened. */
793 objfile_relocate1 (struct objfile
*objfile
,
794 const struct section_offsets
*new_offsets
)
796 struct obj_section
*s
;
797 struct section_offsets
*delta
=
798 ((struct section_offsets
*)
799 alloca (SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
)));
802 int something_changed
= 0;
804 for (i
= 0; i
< objfile
->num_sections
; ++i
)
807 ANOFFSET (new_offsets
, i
) - ANOFFSET (objfile
->section_offsets
, i
);
808 if (ANOFFSET (delta
, i
) != 0)
809 something_changed
= 1;
811 if (!something_changed
)
814 /* OK, get all the symtabs. */
816 struct compunit_symtab
*cust
;
819 ALL_OBJFILE_FILETABS (objfile
, cust
, s
)
824 /* First the line table. */
825 l
= SYMTAB_LINETABLE (s
);
828 for (i
= 0; i
< l
->nitems
; ++i
)
829 l
->item
[i
].pc
+= ANOFFSET (delta
,
830 COMPUNIT_BLOCK_LINE_SECTION
835 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
837 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (cust
);
838 int block_line_section
= COMPUNIT_BLOCK_LINE_SECTION (cust
);
840 if (BLOCKVECTOR_MAP (bv
))
841 addrmap_relocate (BLOCKVECTOR_MAP (bv
),
842 ANOFFSET (delta
, block_line_section
));
844 for (i
= 0; i
< BLOCKVECTOR_NBLOCKS (bv
); ++i
)
848 struct dict_iterator iter
;
850 b
= BLOCKVECTOR_BLOCK (bv
, i
);
851 BLOCK_START (b
) += ANOFFSET (delta
, block_line_section
);
852 BLOCK_END (b
) += ANOFFSET (delta
, block_line_section
);
854 /* We only want to iterate over the local symbols, not any
855 symbols in included symtabs. */
856 ALL_DICT_SYMBOLS (BLOCK_DICT (b
), iter
, sym
)
858 relocate_one_symbol (sym
, objfile
, delta
);
864 /* Relocate isolated symbols. */
868 for (iter
= objfile
->template_symbols
; iter
; iter
= iter
->hash_next
)
869 relocate_one_symbol (iter
, objfile
, delta
);
872 if (objfile
->psymtabs_addrmap
)
873 addrmap_relocate (objfile
->psymtabs_addrmap
,
874 ANOFFSET (delta
, SECT_OFF_TEXT (objfile
)));
877 objfile
->sf
->qf
->relocate (objfile
, new_offsets
, delta
);
882 for (i
= 0; i
< objfile
->num_sections
; ++i
)
883 (objfile
->section_offsets
)->offsets
[i
] = ANOFFSET (new_offsets
, i
);
886 /* Rebuild section map next time we need it. */
887 get_objfile_pspace_data (objfile
->pspace
)->section_map_dirty
= 1;
889 /* Update the table in exec_ops, used to read memory. */
890 ALL_OBJFILE_OSECTIONS (objfile
, s
)
892 int idx
= s
- objfile
->sections
;
894 exec_set_section_address (bfd_get_filename (objfile
->obfd
), idx
,
895 obj_section_addr (s
));
902 /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS
903 entries in new_offsets. Process also OBJFILE's SEPARATE_DEBUG_OBJFILEs.
905 The number and ordering of sections does differ between the two objfiles.
906 Only their names match. Also the file offsets will differ (objfile being
907 possibly prelinked but separate_debug_objfile is probably not prelinked) but
908 the in-memory absolute address as specified by NEW_OFFSETS must match both
912 objfile_relocate (struct objfile
*objfile
,
913 const struct section_offsets
*new_offsets
)
915 struct objfile
*debug_objfile
;
918 changed
|= objfile_relocate1 (objfile
, new_offsets
);
920 for (debug_objfile
= objfile
->separate_debug_objfile
;
922 debug_objfile
= objfile_separate_debug_iterate (objfile
, debug_objfile
))
924 struct section_addr_info
*objfile_addrs
;
925 struct cleanup
*my_cleanups
;
927 objfile_addrs
= build_section_addr_info_from_objfile (objfile
);
928 my_cleanups
= make_cleanup (xfree
, objfile_addrs
);
930 /* Here OBJFILE_ADDRS contain the correct absolute addresses, the
931 relative ones must be already created according to debug_objfile. */
933 addr_info_make_relative (objfile_addrs
, debug_objfile
->obfd
);
935 gdb_assert (debug_objfile
->num_sections
936 == gdb_bfd_count_sections (debug_objfile
->obfd
));
937 std::vector
<struct section_offsets
>
938 new_debug_offsets (SIZEOF_N_SECTION_OFFSETS (debug_objfile
->num_sections
));
939 relative_addr_info_to_section_offsets (new_debug_offsets
.data (),
940 debug_objfile
->num_sections
,
943 changed
|= objfile_relocate1 (debug_objfile
, new_debug_offsets
.data ());
945 do_cleanups (my_cleanups
);
948 /* Relocate breakpoints as necessary, after things are relocated. */
950 breakpoint_re_set ();
953 /* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is
955 Return non-zero iff any change happened. */
958 objfile_rebase1 (struct objfile
*objfile
, CORE_ADDR slide
)
960 struct section_offsets
*new_offsets
=
961 ((struct section_offsets
*)
962 alloca (SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
)));
965 for (i
= 0; i
< objfile
->num_sections
; ++i
)
966 new_offsets
->offsets
[i
] = slide
;
968 return objfile_relocate1 (objfile
, new_offsets
);
971 /* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's
972 SEPARATE_DEBUG_OBJFILEs. */
975 objfile_rebase (struct objfile
*objfile
, CORE_ADDR slide
)
977 struct objfile
*debug_objfile
;
980 changed
|= objfile_rebase1 (objfile
, slide
);
982 for (debug_objfile
= objfile
->separate_debug_objfile
;
984 debug_objfile
= objfile_separate_debug_iterate (objfile
, debug_objfile
))
985 changed
|= objfile_rebase1 (debug_objfile
, slide
);
987 /* Relocate breakpoints as necessary, after things are relocated. */
989 breakpoint_re_set ();
992 /* Return non-zero if OBJFILE has partial symbols. */
995 objfile_has_partial_symbols (struct objfile
*objfile
)
1000 /* If we have not read psymbols, but we have a function capable of reading
1001 them, then that is an indication that they are in fact available. Without
1002 this function the symbols may have been already read in but they also may
1003 not be present in this objfile. */
1004 if ((objfile
->flags
& OBJF_PSYMTABS_READ
) == 0
1005 && objfile
->sf
->sym_read_psymbols
!= NULL
)
1008 return objfile
->sf
->qf
->has_symbols (objfile
);
1011 /* Return non-zero if OBJFILE has full symbols. */
1014 objfile_has_full_symbols (struct objfile
*objfile
)
1016 return objfile
->compunit_symtabs
!= NULL
;
1019 /* Return non-zero if OBJFILE has full or partial symbols, either directly
1020 or through a separate debug file. */
1023 objfile_has_symbols (struct objfile
*objfile
)
1027 for (o
= objfile
; o
; o
= objfile_separate_debug_iterate (objfile
, o
))
1028 if (objfile_has_partial_symbols (o
) || objfile_has_full_symbols (o
))
1034 /* Many places in gdb want to test just to see if we have any partial
1035 symbols available. This function returns zero if none are currently
1036 available, nonzero otherwise. */
1039 have_partial_symbols (void)
1041 struct objfile
*ofp
;
1045 if (objfile_has_partial_symbols (ofp
))
1051 /* Many places in gdb want to test just to see if we have any full
1052 symbols available. This function returns zero if none are currently
1053 available, nonzero otherwise. */
1056 have_full_symbols (void)
1058 struct objfile
*ofp
;
1062 if (objfile_has_full_symbols (ofp
))
1069 /* This operations deletes all objfile entries that represent solibs that
1070 weren't explicitly loaded by the user, via e.g., the add-symbol-file
1074 objfile_purge_solibs (void)
1076 struct objfile
*objf
;
1077 struct objfile
*temp
;
1079 ALL_OBJFILES_SAFE (objf
, temp
)
1081 /* We assume that the solib package has been purged already, or will
1084 if (!(objf
->flags
& OBJF_USERLOADED
) && (objf
->flags
& OBJF_SHARED
))
1090 /* Many places in gdb want to test just to see if we have any minimal
1091 symbols available. This function returns zero if none are currently
1092 available, nonzero otherwise. */
1095 have_minimal_symbols (void)
1097 struct objfile
*ofp
;
1101 if (ofp
->per_bfd
->minimal_symbol_count
> 0)
1109 /* Qsort comparison function. */
1112 qsort_cmp (const void *a
, const void *b
)
1114 const struct obj_section
*sect1
= *(const struct obj_section
**) a
;
1115 const struct obj_section
*sect2
= *(const struct obj_section
**) b
;
1116 const CORE_ADDR sect1_addr
= obj_section_addr (sect1
);
1117 const CORE_ADDR sect2_addr
= obj_section_addr (sect2
);
1119 if (sect1_addr
< sect2_addr
)
1121 else if (sect1_addr
> sect2_addr
)
1125 /* Sections are at the same address. This could happen if
1126 A) we have an objfile and a separate debuginfo.
1127 B) we are confused, and have added sections without proper relocation,
1128 or something like that. */
1130 const struct objfile
*const objfile1
= sect1
->objfile
;
1131 const struct objfile
*const objfile2
= sect2
->objfile
;
1133 if (objfile1
->separate_debug_objfile
== objfile2
1134 || objfile2
->separate_debug_objfile
== objfile1
)
1136 /* Case A. The ordering doesn't matter: separate debuginfo files
1137 will be filtered out later. */
1142 /* Case B. Maintain stable sort order, so bugs in GDB are easier to
1143 triage. This section could be slow (since we iterate over all
1144 objfiles in each call to qsort_cmp), but this shouldn't happen
1145 very often (GDB is already in a confused state; one hopes this
1146 doesn't happen at all). If you discover that significant time is
1147 spent in the loops below, do 'set complaints 100' and examine the
1148 resulting complaints. */
1150 if (objfile1
== objfile2
)
1152 /* Both sections came from the same objfile. We are really confused.
1153 Sort on sequence order of sections within the objfile. */
1155 const struct obj_section
*osect
;
1157 ALL_OBJFILE_OSECTIONS (objfile1
, osect
)
1160 else if (osect
== sect2
)
1163 /* We should have found one of the sections before getting here. */
1164 gdb_assert_not_reached ("section not found");
1168 /* Sort on sequence number of the objfile in the chain. */
1170 const struct objfile
*objfile
;
1172 ALL_OBJFILES (objfile
)
1173 if (objfile
== objfile1
)
1175 else if (objfile
== objfile2
)
1178 /* We should have found one of the objfiles before getting here. */
1179 gdb_assert_not_reached ("objfile not found");
1184 gdb_assert_not_reached ("unexpected code path");
1188 /* Select "better" obj_section to keep. We prefer the one that came from
1189 the real object, rather than the one from separate debuginfo.
1190 Most of the time the two sections are exactly identical, but with
1191 prelinking the .rel.dyn section in the real object may have different
1194 static struct obj_section
*
1195 preferred_obj_section (struct obj_section
*a
, struct obj_section
*b
)
1197 gdb_assert (obj_section_addr (a
) == obj_section_addr (b
));
1198 gdb_assert ((a
->objfile
->separate_debug_objfile
== b
->objfile
)
1199 || (b
->objfile
->separate_debug_objfile
== a
->objfile
));
1200 gdb_assert ((a
->objfile
->separate_debug_objfile_backlink
== b
->objfile
)
1201 || (b
->objfile
->separate_debug_objfile_backlink
== a
->objfile
));
1203 if (a
->objfile
->separate_debug_objfile
!= NULL
)
1208 /* Return 1 if SECTION should be inserted into the section map.
1209 We want to insert only non-overlay and non-TLS section. */
1212 insert_section_p (const struct bfd
*abfd
,
1213 const struct bfd_section
*section
)
1215 const bfd_vma lma
= bfd_section_lma (abfd
, section
);
1217 if (overlay_debugging
&& lma
!= 0 && lma
!= bfd_section_vma (abfd
, section
)
1218 && (bfd_get_file_flags (abfd
) & BFD_IN_MEMORY
) == 0)
1219 /* This is an overlay section. IN_MEMORY check is needed to avoid
1220 discarding sections from the "system supplied DSO" (aka vdso)
1221 on some Linux systems (e.g. Fedora 11). */
1223 if ((bfd_get_section_flags (abfd
, section
) & SEC_THREAD_LOCAL
) != 0)
1224 /* This is a TLS section. */
1230 /* Filter out overlapping sections where one section came from the real
1231 objfile, and the other from a separate debuginfo file.
1232 Return the size of table after redundant sections have been eliminated. */
1235 filter_debuginfo_sections (struct obj_section
**map
, int map_size
)
1239 for (i
= 0, j
= 0; i
< map_size
- 1; i
++)
1241 struct obj_section
*const sect1
= map
[i
];
1242 struct obj_section
*const sect2
= map
[i
+ 1];
1243 const struct objfile
*const objfile1
= sect1
->objfile
;
1244 const struct objfile
*const objfile2
= sect2
->objfile
;
1245 const CORE_ADDR sect1_addr
= obj_section_addr (sect1
);
1246 const CORE_ADDR sect2_addr
= obj_section_addr (sect2
);
1248 if (sect1_addr
== sect2_addr
1249 && (objfile1
->separate_debug_objfile
== objfile2
1250 || objfile2
->separate_debug_objfile
== objfile1
))
1252 map
[j
++] = preferred_obj_section (sect1
, sect2
);
1261 gdb_assert (i
== map_size
- 1);
1265 /* The map should not have shrunk to less than half the original size. */
1266 gdb_assert (map_size
/ 2 <= j
);
1271 /* Filter out overlapping sections, issuing a warning if any are found.
1272 Overlapping sections could really be overlay sections which we didn't
1273 classify as such in insert_section_p, or we could be dealing with a
1277 filter_overlapping_sections (struct obj_section
**map
, int map_size
)
1281 for (i
= 0, j
= 0; i
< map_size
- 1; )
1286 for (k
= i
+ 1; k
< map_size
; k
++)
1288 struct obj_section
*const sect1
= map
[i
];
1289 struct obj_section
*const sect2
= map
[k
];
1290 const CORE_ADDR sect1_addr
= obj_section_addr (sect1
);
1291 const CORE_ADDR sect2_addr
= obj_section_addr (sect2
);
1292 const CORE_ADDR sect1_endaddr
= obj_section_endaddr (sect1
);
1294 gdb_assert (sect1_addr
<= sect2_addr
);
1296 if (sect1_endaddr
<= sect2_addr
)
1300 /* We have an overlap. Report it. */
1302 struct objfile
*const objf1
= sect1
->objfile
;
1303 struct objfile
*const objf2
= sect2
->objfile
;
1305 const struct bfd_section
*const bfds1
= sect1
->the_bfd_section
;
1306 const struct bfd_section
*const bfds2
= sect2
->the_bfd_section
;
1308 const CORE_ADDR sect2_endaddr
= obj_section_endaddr (sect2
);
1310 struct gdbarch
*const gdbarch
= get_objfile_arch (objf1
);
1312 complaint (&symfile_complaints
,
1313 _("unexpected overlap between:\n"
1314 " (A) section `%s' from `%s' [%s, %s)\n"
1315 " (B) section `%s' from `%s' [%s, %s).\n"
1316 "Will ignore section B"),
1317 bfd_section_name (abfd1
, bfds1
), objfile_name (objf1
),
1318 paddress (gdbarch
, sect1_addr
),
1319 paddress (gdbarch
, sect1_endaddr
),
1320 bfd_section_name (abfd2
, bfds2
), objfile_name (objf2
),
1321 paddress (gdbarch
, sect2_addr
),
1322 paddress (gdbarch
, sect2_endaddr
));
1330 gdb_assert (i
== map_size
- 1);
1338 /* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any
1339 TLS, overlay and overlapping sections. */
1342 update_section_map (struct program_space
*pspace
,
1343 struct obj_section
***pmap
, int *pmap_size
)
1345 struct objfile_pspace_info
*pspace_info
;
1346 int alloc_size
, map_size
, i
;
1347 struct obj_section
*s
, **map
;
1348 struct objfile
*objfile
;
1350 pspace_info
= get_objfile_pspace_data (pspace
);
1351 gdb_assert (pspace_info
->section_map_dirty
!= 0
1352 || pspace_info
->new_objfiles_available
!= 0);
1358 ALL_PSPACE_OBJFILES (pspace
, objfile
)
1359 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1360 if (insert_section_p (objfile
->obfd
, s
->the_bfd_section
))
1363 /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */
1364 if (alloc_size
== 0)
1371 map
= XNEWVEC (struct obj_section
*, alloc_size
);
1374 ALL_PSPACE_OBJFILES (pspace
, objfile
)
1375 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1376 if (insert_section_p (objfile
->obfd
, s
->the_bfd_section
))
1379 qsort (map
, alloc_size
, sizeof (*map
), qsort_cmp
);
1380 map_size
= filter_debuginfo_sections(map
, alloc_size
);
1381 map_size
= filter_overlapping_sections(map
, map_size
);
1383 if (map_size
< alloc_size
)
1384 /* Some sections were eliminated. Trim excess space. */
1385 map
= XRESIZEVEC (struct obj_section
*, map
, map_size
);
1387 gdb_assert (alloc_size
== map_size
);
1390 *pmap_size
= map_size
;
1393 /* Bsearch comparison function. */
1396 bsearch_cmp (const void *key
, const void *elt
)
1398 const CORE_ADDR pc
= *(CORE_ADDR
*) key
;
1399 const struct obj_section
*section
= *(const struct obj_section
**) elt
;
1401 if (pc
< obj_section_addr (section
))
1403 if (pc
< obj_section_endaddr (section
))
1408 /* Returns a section whose range includes PC or NULL if none found. */
1410 struct obj_section
*
1411 find_pc_section (CORE_ADDR pc
)
1413 struct objfile_pspace_info
*pspace_info
;
1414 struct obj_section
*s
, **sp
;
1416 /* Check for mapped overlay section first. */
1417 s
= find_pc_mapped_section (pc
);
1421 pspace_info
= get_objfile_pspace_data (current_program_space
);
1422 if (pspace_info
->section_map_dirty
1423 || (pspace_info
->new_objfiles_available
1424 && !pspace_info
->inhibit_updates
))
1426 update_section_map (current_program_space
,
1427 &pspace_info
->sections
,
1428 &pspace_info
->num_sections
);
1430 /* Don't need updates to section map until objfiles are added,
1431 removed or relocated. */
1432 pspace_info
->new_objfiles_available
= 0;
1433 pspace_info
->section_map_dirty
= 0;
1436 /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to
1437 bsearch be non-NULL. */
1438 if (pspace_info
->sections
== NULL
)
1440 gdb_assert (pspace_info
->num_sections
== 0);
1444 sp
= (struct obj_section
**) bsearch (&pc
,
1445 pspace_info
->sections
,
1446 pspace_info
->num_sections
,
1447 sizeof (*pspace_info
->sections
),
1455 /* Return non-zero if PC is in a section called NAME. */
1458 pc_in_section (CORE_ADDR pc
, const char *name
)
1460 struct obj_section
*s
;
1463 s
= find_pc_section (pc
);
1466 && s
->the_bfd_section
->name
!= NULL
1467 && strcmp (s
->the_bfd_section
->name
, name
) == 0);
1472 /* Set section_map_dirty so section map will be rebuilt next time it
1473 is used. Called by reread_symbols. */
1476 objfiles_changed (void)
1478 /* Rebuild section map next time we need it. */
1479 get_objfile_pspace_data (current_program_space
)->section_map_dirty
= 1;
1482 /* See comments in objfiles.h. */
1485 inhibit_section_map_updates (struct program_space
*pspace
)
1487 get_objfile_pspace_data (pspace
)->inhibit_updates
= 1;
1490 /* See comments in objfiles.h. */
1493 resume_section_map_updates (struct program_space
*pspace
)
1495 get_objfile_pspace_data (pspace
)->inhibit_updates
= 0;
1498 /* See comments in objfiles.h. */
1501 resume_section_map_updates_cleanup (void *arg
)
1503 resume_section_map_updates ((struct program_space
*) arg
);
1506 /* Return 1 if ADDR maps into one of the sections of OBJFILE and 0
1510 is_addr_in_objfile (CORE_ADDR addr
, const struct objfile
*objfile
)
1512 struct obj_section
*osect
;
1514 if (objfile
== NULL
)
1517 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
1519 if (section_is_overlay (osect
) && !section_is_mapped (osect
))
1522 if (obj_section_addr (osect
) <= addr
1523 && addr
< obj_section_endaddr (osect
))
1530 shared_objfile_contains_address_p (struct program_space
*pspace
,
1533 struct objfile
*objfile
;
1535 ALL_PSPACE_OBJFILES (pspace
, objfile
)
1537 if ((objfile
->flags
& OBJF_SHARED
) != 0
1538 && is_addr_in_objfile (address
, objfile
))
1545 /* The default implementation for the "iterate_over_objfiles_in_search_order"
1546 gdbarch method. It is equivalent to use the ALL_OBJFILES macro,
1547 searching the objfiles in the order they are stored internally,
1548 ignoring CURRENT_OBJFILE.
1550 On most platorms, it should be close enough to doing the best
1551 we can without some knowledge specific to the architecture. */
1554 default_iterate_over_objfiles_in_search_order
1555 (struct gdbarch
*gdbarch
,
1556 iterate_over_objfiles_in_search_order_cb_ftype
*cb
,
1557 void *cb_data
, struct objfile
*current_objfile
)
1560 struct objfile
*objfile
;
1562 ALL_OBJFILES (objfile
)
1564 stop
= cb (objfile
, cb_data
);
1570 /* See objfiles.h. */
1573 objfile_name (const struct objfile
*objfile
)
1575 if (objfile
->obfd
!= NULL
)
1576 return bfd_get_filename (objfile
->obfd
);
1578 return objfile
->original_name
;
1581 /* See objfiles.h. */
1584 objfile_filename (const struct objfile
*objfile
)
1586 if (objfile
->obfd
!= NULL
)
1587 return bfd_get_filename (objfile
->obfd
);
1592 /* See objfiles.h. */
1595 objfile_debug_name (const struct objfile
*objfile
)
1597 return lbasename (objfile
->original_name
);
1600 /* See objfiles.h. */
1603 objfile_flavour_name (struct objfile
*objfile
)
1605 if (objfile
->obfd
!= NULL
)
1606 return bfd_flavour_name (bfd_get_flavour (objfile
->obfd
));
1611 _initialize_objfiles (void)
1613 objfiles_pspace_data
1614 = register_program_space_data_with_cleanup (NULL
,
1615 objfiles_pspace_data_cleanup
);
1617 objfiles_bfd_data
= register_bfd_data_with_cleanup (NULL
,
1618 objfile_bfd_data_free
);