1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2013 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/>. */
23 #include "arch-utils.h"
35 #include "breakpoint.h"
37 #include "complaints.h"
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
47 #include "readline/readline.h"
48 #include "gdb_assert.h"
52 #include "parser-defs.h"
59 #include "cli/cli-utils.h"
61 #include <sys/types.h>
63 #include "gdb_string.h"
71 int (*deprecated_ui_load_progress_hook
) (const char *section
,
73 void (*deprecated_show_load_progress
) (const char *section
,
74 unsigned long section_sent
,
75 unsigned long section_size
,
76 unsigned long total_sent
,
77 unsigned long total_size
);
78 void (*deprecated_pre_add_symbol_hook
) (const char *);
79 void (*deprecated_post_add_symbol_hook
) (void);
81 static void clear_symtab_users_cleanup (void *ignore
);
83 /* Global variables owned by this file. */
84 int readnow_symbol_files
; /* Read full symbols immediately. */
86 /* Functions this file defines. */
88 static void load_command (char *, int);
90 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
92 static void add_symbol_file_command (char *, int);
94 bfd
*symfile_bfd_open (char *);
96 int get_section_index (struct objfile
*, char *);
98 static const struct sym_fns
*find_sym_fns (bfd
*);
100 static void decrement_reading_symtab (void *);
102 static void overlay_invalidate_all (void);
104 static void overlay_auto_command (char *, int);
106 static void overlay_manual_command (char *, int);
108 static void overlay_off_command (char *, int);
110 static void overlay_load_command (char *, int);
112 static void overlay_command (char *, int);
114 static void simple_free_overlay_table (void);
116 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
119 static int simple_read_overlay_table (void);
121 static int simple_overlay_update_1 (struct obj_section
*);
123 static void add_filename_language (char *ext
, enum language lang
);
125 static void info_ext_lang_command (char *args
, int from_tty
);
127 static void init_filename_language_table (void);
129 static void symfile_find_segment_sections (struct objfile
*objfile
);
131 void _initialize_symfile (void);
133 /* List of all available sym_fns. On gdb startup, each object file reader
134 calls add_symtab_fns() to register information on each format it is
137 typedef const struct sym_fns
*sym_fns_ptr
;
138 DEF_VEC_P (sym_fns_ptr
);
140 static VEC (sym_fns_ptr
) *symtab_fns
= NULL
;
142 /* If non-zero, shared library symbols will be added automatically
143 when the inferior is created, new libraries are loaded, or when
144 attaching to the inferior. This is almost always what users will
145 want to have happen; but for very large programs, the startup time
146 will be excessive, and so if this is a problem, the user can clear
147 this flag and then add the shared library symbols as needed. Note
148 that there is a potential for confusion, since if the shared
149 library symbols are not loaded, commands like "info fun" will *not*
150 report all the functions that are actually present. */
152 int auto_solib_add
= 1;
155 /* True if we are reading a symbol table. */
157 int currently_reading_symtab
= 0;
160 decrement_reading_symtab (void *dummy
)
162 currently_reading_symtab
--;
165 /* Increment currently_reading_symtab and return a cleanup that can be
166 used to decrement it. */
168 increment_reading_symtab (void)
170 ++currently_reading_symtab
;
171 return make_cleanup (decrement_reading_symtab
, NULL
);
174 /* Remember the lowest-addressed loadable section we've seen.
175 This function is called via bfd_map_over_sections.
177 In case of equal vmas, the section with the largest size becomes the
178 lowest-addressed loadable section.
180 If the vmas and sizes are equal, the last section is considered the
181 lowest-addressed loadable section. */
184 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
186 asection
**lowest
= (asection
**) obj
;
188 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
191 *lowest
= sect
; /* First loadable section */
192 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
193 *lowest
= sect
; /* A lower loadable section */
194 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
195 && (bfd_section_size (abfd
, (*lowest
))
196 <= bfd_section_size (abfd
, sect
)))
200 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
201 new object's 'num_sections' field is set to 0; it must be updated
204 struct section_addr_info
*
205 alloc_section_addr_info (size_t num_sections
)
207 struct section_addr_info
*sap
;
210 size
= (sizeof (struct section_addr_info
)
211 + sizeof (struct other_sections
) * (num_sections
- 1));
212 sap
= (struct section_addr_info
*) xmalloc (size
);
213 memset (sap
, 0, size
);
218 /* Build (allocate and populate) a section_addr_info struct from
219 an existing section table. */
221 extern struct section_addr_info
*
222 build_section_addr_info_from_section_table (const struct target_section
*start
,
223 const struct target_section
*end
)
225 struct section_addr_info
*sap
;
226 const struct target_section
*stp
;
229 sap
= alloc_section_addr_info (end
- start
);
231 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
233 if (bfd_get_section_flags (stp
->bfd
,
234 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
235 && oidx
< end
- start
)
237 sap
->other
[oidx
].addr
= stp
->addr
;
238 sap
->other
[oidx
].name
239 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
240 sap
->other
[oidx
].sectindex
241 = gdb_bfd_section_index (stp
->bfd
, stp
->the_bfd_section
);
246 sap
->num_sections
= oidx
;
251 /* Create a section_addr_info from section offsets in ABFD. */
253 static struct section_addr_info
*
254 build_section_addr_info_from_bfd (bfd
*abfd
)
256 struct section_addr_info
*sap
;
258 struct bfd_section
*sec
;
260 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
261 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
262 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
264 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
265 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
266 sap
->other
[i
].sectindex
= gdb_bfd_section_index (abfd
, sec
);
270 sap
->num_sections
= i
;
275 /* Create a section_addr_info from section offsets in OBJFILE. */
277 struct section_addr_info
*
278 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
280 struct section_addr_info
*sap
;
283 /* Before reread_symbols gets rewritten it is not safe to call:
284 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
286 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
287 for (i
= 0; i
< sap
->num_sections
; i
++)
289 int sectindex
= sap
->other
[i
].sectindex
;
291 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
296 /* Free all memory allocated by build_section_addr_info_from_section_table. */
299 free_section_addr_info (struct section_addr_info
*sap
)
303 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
304 xfree (sap
->other
[idx
].name
);
309 /* Initialize OBJFILE's sect_index_* members. */
311 init_objfile_sect_indices (struct objfile
*objfile
)
316 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
318 objfile
->sect_index_text
= sect
->index
;
320 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
322 objfile
->sect_index_data
= sect
->index
;
324 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
326 objfile
->sect_index_bss
= sect
->index
;
328 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
330 objfile
->sect_index_rodata
= sect
->index
;
332 /* This is where things get really weird... We MUST have valid
333 indices for the various sect_index_* members or gdb will abort.
334 So if for example, there is no ".text" section, we have to
335 accomodate that. First, check for a file with the standard
336 one or two segments. */
338 symfile_find_segment_sections (objfile
);
340 /* Except when explicitly adding symbol files at some address,
341 section_offsets contains nothing but zeros, so it doesn't matter
342 which slot in section_offsets the individual sect_index_* members
343 index into. So if they are all zero, it is safe to just point
344 all the currently uninitialized indices to the first slot. But
345 beware: if this is the main executable, it may be relocated
346 later, e.g. by the remote qOffsets packet, and then this will
347 be wrong! That's why we try segments first. */
349 for (i
= 0; i
< objfile
->num_sections
; i
++)
351 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
356 if (i
== objfile
->num_sections
)
358 if (objfile
->sect_index_text
== -1)
359 objfile
->sect_index_text
= 0;
360 if (objfile
->sect_index_data
== -1)
361 objfile
->sect_index_data
= 0;
362 if (objfile
->sect_index_bss
== -1)
363 objfile
->sect_index_bss
= 0;
364 if (objfile
->sect_index_rodata
== -1)
365 objfile
->sect_index_rodata
= 0;
369 /* The arguments to place_section. */
371 struct place_section_arg
373 struct section_offsets
*offsets
;
377 /* Find a unique offset to use for loadable section SECT if
378 the user did not provide an offset. */
381 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
383 struct place_section_arg
*arg
= obj
;
384 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
386 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
388 /* We are only interested in allocated sections. */
389 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
392 /* If the user specified an offset, honor it. */
393 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
396 /* Otherwise, let's try to find a place for the section. */
397 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
404 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
406 int indx
= cur_sec
->index
;
408 /* We don't need to compare against ourself. */
412 /* We can only conflict with allocated sections. */
413 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
416 /* If the section offset is 0, either the section has not been placed
417 yet, or it was the lowest section placed (in which case LOWEST
418 will be past its end). */
419 if (offsets
[indx
] == 0)
422 /* If this section would overlap us, then we must move up. */
423 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
424 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
426 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
427 start_addr
= (start_addr
+ align
- 1) & -align
;
432 /* Otherwise, we appear to be OK. So far. */
437 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
438 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
441 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
442 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
446 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
448 struct section_addr_info
*addrs
)
452 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
454 /* Now calculate offsets for section that were specified by the caller. */
455 for (i
= 0; i
< addrs
->num_sections
; i
++)
457 struct other_sections
*osp
;
459 osp
= &addrs
->other
[i
];
460 if (osp
->sectindex
== -1)
463 /* Record all sections in offsets. */
464 /* The section_offsets in the objfile are here filled in using
466 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
470 /* Transform section name S for a name comparison. prelink can split section
471 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
472 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
473 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
474 (`.sbss') section has invalid (increased) virtual address. */
477 addr_section_name (const char *s
)
479 if (strcmp (s
, ".dynbss") == 0)
481 if (strcmp (s
, ".sdynbss") == 0)
487 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
488 their (name, sectindex) pair. sectindex makes the sort by name stable. */
491 addrs_section_compar (const void *ap
, const void *bp
)
493 const struct other_sections
*a
= *((struct other_sections
**) ap
);
494 const struct other_sections
*b
= *((struct other_sections
**) bp
);
497 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
501 return a
->sectindex
- b
->sectindex
;
504 /* Provide sorted array of pointers to sections of ADDRS. The array is
505 terminated by NULL. Caller is responsible to call xfree for it. */
507 static struct other_sections
**
508 addrs_section_sort (struct section_addr_info
*addrs
)
510 struct other_sections
**array
;
513 /* `+ 1' for the NULL terminator. */
514 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
515 for (i
= 0; i
< addrs
->num_sections
; i
++)
516 array
[i
] = &addrs
->other
[i
];
519 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
524 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
525 also SECTINDEXes specific to ABFD there. This function can be used to
526 rebase ADDRS to start referencing different BFD than before. */
529 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
531 asection
*lower_sect
;
532 CORE_ADDR lower_offset
;
534 struct cleanup
*my_cleanup
;
535 struct section_addr_info
*abfd_addrs
;
536 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
537 struct other_sections
**addrs_to_abfd_addrs
;
539 /* Find lowest loadable section to be used as starting point for
540 continguous sections. */
542 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
543 if (lower_sect
== NULL
)
545 warning (_("no loadable sections found in added symbol-file %s"),
546 bfd_get_filename (abfd
));
550 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
552 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
553 in ABFD. Section names are not unique - there can be multiple sections of
554 the same name. Also the sections of the same name do not have to be
555 adjacent to each other. Some sections may be present only in one of the
556 files. Even sections present in both files do not have to be in the same
559 Use stable sort by name for the sections in both files. Then linearly
560 scan both lists matching as most of the entries as possible. */
562 addrs_sorted
= addrs_section_sort (addrs
);
563 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
565 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
566 make_cleanup_free_section_addr_info (abfd_addrs
);
567 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
568 make_cleanup (xfree
, abfd_addrs_sorted
);
570 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
571 ABFD_ADDRS_SORTED. */
573 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
574 * addrs
->num_sections
);
575 make_cleanup (xfree
, addrs_to_abfd_addrs
);
577 while (*addrs_sorted
)
579 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
581 while (*abfd_addrs_sorted
582 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
586 if (*abfd_addrs_sorted
587 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
592 /* Make the found item directly addressable from ADDRS. */
593 index_in_addrs
= *addrs_sorted
- addrs
->other
;
594 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
595 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
597 /* Never use the same ABFD entry twice. */
604 /* Calculate offsets for the loadable sections.
605 FIXME! Sections must be in order of increasing loadable section
606 so that contiguous sections can use the lower-offset!!!
608 Adjust offsets if the segments are not contiguous.
609 If the section is contiguous, its offset should be set to
610 the offset of the highest loadable section lower than it
611 (the loadable section directly below it in memory).
612 this_offset = lower_offset = lower_addr - lower_orig_addr */
614 for (i
= 0; i
< addrs
->num_sections
; i
++)
616 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
620 /* This is the index used by BFD. */
621 addrs
->other
[i
].sectindex
= sect
->sectindex
;
623 if (addrs
->other
[i
].addr
!= 0)
625 addrs
->other
[i
].addr
-= sect
->addr
;
626 lower_offset
= addrs
->other
[i
].addr
;
629 addrs
->other
[i
].addr
= lower_offset
;
633 /* addr_section_name transformation is not used for SECT_NAME. */
634 const char *sect_name
= addrs
->other
[i
].name
;
636 /* This section does not exist in ABFD, which is normally
637 unexpected and we want to issue a warning.
639 However, the ELF prelinker does create a few sections which are
640 marked in the main executable as loadable (they are loaded in
641 memory from the DYNAMIC segment) and yet are not present in
642 separate debug info files. This is fine, and should not cause
643 a warning. Shared libraries contain just the section
644 ".gnu.liblist" but it is not marked as loadable there. There is
645 no other way to identify them than by their name as the sections
646 created by prelink have no special flags.
648 For the sections `.bss' and `.sbss' see addr_section_name. */
650 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
651 || strcmp (sect_name
, ".gnu.conflict") == 0
652 || (strcmp (sect_name
, ".bss") == 0
654 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
655 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
656 || (strcmp (sect_name
, ".sbss") == 0
658 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
659 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
660 warning (_("section %s not found in %s"), sect_name
,
661 bfd_get_filename (abfd
));
663 addrs
->other
[i
].addr
= 0;
664 addrs
->other
[i
].sectindex
= -1;
668 do_cleanups (my_cleanup
);
671 /* Parse the user's idea of an offset for dynamic linking, into our idea
672 of how to represent it for fast symbol reading. This is the default
673 version of the sym_fns.sym_offsets function for symbol readers that
674 don't need to do anything special. It allocates a section_offsets table
675 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
678 default_symfile_offsets (struct objfile
*objfile
,
679 struct section_addr_info
*addrs
)
681 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
682 objfile
->section_offsets
= (struct section_offsets
*)
683 obstack_alloc (&objfile
->objfile_obstack
,
684 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
685 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
686 objfile
->num_sections
, addrs
);
688 /* For relocatable files, all loadable sections will start at zero.
689 The zero is meaningless, so try to pick arbitrary addresses such
690 that no loadable sections overlap. This algorithm is quadratic,
691 but the number of sections in a single object file is generally
693 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
695 struct place_section_arg arg
;
696 bfd
*abfd
= objfile
->obfd
;
699 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
700 /* We do not expect this to happen; just skip this step if the
701 relocatable file has a section with an assigned VMA. */
702 if (bfd_section_vma (abfd
, cur_sec
) != 0)
707 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
709 /* Pick non-overlapping offsets for sections the user did not
711 arg
.offsets
= objfile
->section_offsets
;
713 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
715 /* Correctly filling in the section offsets is not quite
716 enough. Relocatable files have two properties that
717 (most) shared objects do not:
719 - Their debug information will contain relocations. Some
720 shared libraries do also, but many do not, so this can not
723 - If there are multiple code sections they will be loaded
724 at different relative addresses in memory than they are
725 in the objfile, since all sections in the file will start
728 Because GDB has very limited ability to map from an
729 address in debug info to the correct code section,
730 it relies on adding SECT_OFF_TEXT to things which might be
731 code. If we clear all the section offsets, and set the
732 section VMAs instead, then symfile_relocate_debug_section
733 will return meaningful debug information pointing at the
736 GDB has too many different data structures for section
737 addresses - a bfd, objfile, and so_list all have section
738 tables, as does exec_ops. Some of these could probably
741 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
742 cur_sec
= cur_sec
->next
)
744 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
747 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
748 exec_set_section_address (bfd_get_filename (abfd
),
750 offsets
[cur_sec
->index
]);
751 offsets
[cur_sec
->index
] = 0;
756 /* Remember the bfd indexes for the .text, .data, .bss and
758 init_objfile_sect_indices (objfile
);
762 /* Divide the file into segments, which are individual relocatable units.
763 This is the default version of the sym_fns.sym_segments function for
764 symbol readers that do not have an explicit representation of segments.
765 It assumes that object files do not have segments, and fully linked
766 files have a single segment. */
768 struct symfile_segment_data
*
769 default_symfile_segments (bfd
*abfd
)
773 struct symfile_segment_data
*data
;
776 /* Relocatable files contain enough information to position each
777 loadable section independently; they should not be relocated
779 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
782 /* Make sure there is at least one loadable section in the file. */
783 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
785 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
793 low
= bfd_get_section_vma (abfd
, sect
);
794 high
= low
+ bfd_get_section_size (sect
);
796 data
= XZALLOC (struct symfile_segment_data
);
797 data
->num_segments
= 1;
798 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
799 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
801 num_sections
= bfd_count_sections (abfd
);
802 data
->segment_info
= XCALLOC (num_sections
, int);
804 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
808 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
811 vma
= bfd_get_section_vma (abfd
, sect
);
814 if (vma
+ bfd_get_section_size (sect
) > high
)
815 high
= vma
+ bfd_get_section_size (sect
);
817 data
->segment_info
[i
] = 1;
820 data
->segment_bases
[0] = low
;
821 data
->segment_sizes
[0] = high
- low
;
826 /* This is a convenience function to call sym_read for OBJFILE and
827 possibly force the partial symbols to be read. */
830 read_symbols (struct objfile
*objfile
, int add_flags
)
832 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
834 /* find_separate_debug_file_in_section should be called only if there is
835 single binary with no existing separate debug info file. */
836 if (!objfile_has_partial_symbols (objfile
)
837 && objfile
->separate_debug_objfile
== NULL
838 && objfile
->separate_debug_objfile_backlink
== NULL
)
840 bfd
*abfd
= find_separate_debug_file_in_section (objfile
);
841 struct cleanup
*cleanup
= make_cleanup_bfd_unref (abfd
);
844 symbol_file_add_separate (abfd
, add_flags
, objfile
);
846 do_cleanups (cleanup
);
848 if ((add_flags
& SYMFILE_NO_READ
) == 0)
849 require_partial_symbols (objfile
, 0);
852 /* Initialize entry point information for this objfile. */
855 init_entry_point_info (struct objfile
*objfile
)
857 /* Save startup file's range of PC addresses to help blockframe.c
858 decide where the bottom of the stack is. */
860 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
862 /* Executable file -- record its entry point so we'll recognize
863 the startup file because it contains the entry point. */
864 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
865 objfile
->ei
.entry_point_p
= 1;
867 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
868 && bfd_get_start_address (objfile
->obfd
) != 0)
870 /* Some shared libraries may have entry points set and be
871 runnable. There's no clear way to indicate this, so just check
872 for values other than zero. */
873 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
874 objfile
->ei
.entry_point_p
= 1;
878 /* Examination of non-executable.o files. Short-circuit this stuff. */
879 objfile
->ei
.entry_point_p
= 0;
882 if (objfile
->ei
.entry_point_p
)
884 CORE_ADDR entry_point
= objfile
->ei
.entry_point
;
886 /* Make certain that the address points at real code, and not a
887 function descriptor. */
889 = gdbarch_convert_from_func_ptr_addr (objfile
->gdbarch
,
893 /* Remove any ISA markers, so that this matches entries in the
895 objfile
->ei
.entry_point
896 = gdbarch_addr_bits_remove (objfile
->gdbarch
, entry_point
);
900 /* Process a symbol file, as either the main file or as a dynamically
903 This function does not set the OBJFILE's entry-point info.
905 OBJFILE is where the symbols are to be read from.
907 ADDRS is the list of section load addresses. If the user has given
908 an 'add-symbol-file' command, then this is the list of offsets and
909 addresses he or she provided as arguments to the command; or, if
910 we're handling a shared library, these are the actual addresses the
911 sections are loaded at, according to the inferior's dynamic linker
912 (as gleaned by GDB's shared library code). We convert each address
913 into an offset from the section VMA's as it appears in the object
914 file, and then call the file's sym_offsets function to convert this
915 into a format-specific offset table --- a `struct section_offsets'.
916 If ADDRS is non-zero, OFFSETS must be zero.
918 OFFSETS is a table of section offsets already in the right
919 format-specific representation. NUM_OFFSETS is the number of
920 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
921 assume this is the proper table the call to sym_offsets described
922 above would produce. Instead of calling sym_offsets, we just dump
923 it right into objfile->section_offsets. (When we're re-reading
924 symbols from an objfile, we don't have the original load address
925 list any more; all we have is the section offset table.) If
926 OFFSETS is non-zero, ADDRS must be zero.
928 ADD_FLAGS encodes verbosity level, whether this is main symbol or
929 an extra symbol file such as dynamically loaded code, and wether
930 breakpoint reset should be deferred. */
933 syms_from_objfile_1 (struct objfile
*objfile
,
934 struct section_addr_info
*addrs
,
935 struct section_offsets
*offsets
,
939 struct section_addr_info
*local_addr
= NULL
;
940 struct cleanup
*old_chain
;
941 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
943 gdb_assert (! (addrs
&& offsets
));
945 objfile
->sf
= find_sym_fns (objfile
->obfd
);
947 if (objfile
->sf
== NULL
)
949 /* No symbols to load, but we still need to make sure
950 that the section_offsets table is allocated. */
951 int num_sections
= bfd_count_sections (objfile
->obfd
);
952 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
954 objfile
->num_sections
= num_sections
;
955 objfile
->section_offsets
956 = obstack_alloc (&objfile
->objfile_obstack
, size
);
957 memset (objfile
->section_offsets
, 0, size
);
961 /* Make sure that partially constructed symbol tables will be cleaned up
962 if an error occurs during symbol reading. */
963 old_chain
= make_cleanup_free_objfile (objfile
);
965 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
966 list. We now establish the convention that an addr of zero means
967 no load address was specified. */
968 if (! addrs
&& ! offsets
)
971 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
972 make_cleanup (xfree
, local_addr
);
976 /* Now either addrs or offsets is non-zero. */
980 /* We will modify the main symbol table, make sure that all its users
981 will be cleaned up if an error occurs during symbol reading. */
982 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
984 /* Since no error yet, throw away the old symbol table. */
986 if (symfile_objfile
!= NULL
)
988 free_objfile (symfile_objfile
);
989 gdb_assert (symfile_objfile
== NULL
);
992 /* Currently we keep symbols from the add-symbol-file command.
993 If the user wants to get rid of them, they should do "symbol-file"
994 without arguments first. Not sure this is the best behavior
997 (*objfile
->sf
->sym_new_init
) (objfile
);
1000 /* Convert addr into an offset rather than an absolute address.
1001 We find the lowest address of a loaded segment in the objfile,
1002 and assume that <addr> is where that got loaded.
1004 We no longer warn if the lowest section is not a text segment (as
1005 happens for the PA64 port. */
1006 if (addrs
&& addrs
->num_sections
> 0)
1007 addr_info_make_relative (addrs
, objfile
->obfd
);
1009 /* Initialize symbol reading routines for this objfile, allow complaints to
1010 appear for this new file, and record how verbose to be, then do the
1011 initial symbol reading for this file. */
1013 (*objfile
->sf
->sym_init
) (objfile
);
1014 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1017 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1020 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
1022 /* Just copy in the offset table directly as given to us. */
1023 objfile
->num_sections
= num_offsets
;
1024 objfile
->section_offsets
1025 = ((struct section_offsets
*)
1026 obstack_alloc (&objfile
->objfile_obstack
, size
));
1027 memcpy (objfile
->section_offsets
, offsets
, size
);
1029 init_objfile_sect_indices (objfile
);
1032 read_symbols (objfile
, add_flags
);
1034 /* Discard cleanups as symbol reading was successful. */
1036 discard_cleanups (old_chain
);
1040 /* Same as syms_from_objfile_1, but also initializes the objfile
1041 entry-point info. */
1044 syms_from_objfile (struct objfile
*objfile
,
1045 struct section_addr_info
*addrs
,
1046 struct section_offsets
*offsets
,
1050 syms_from_objfile_1 (objfile
, addrs
, offsets
, num_offsets
, add_flags
);
1051 init_entry_point_info (objfile
);
1054 /* Perform required actions after either reading in the initial
1055 symbols for a new objfile, or mapping in the symbols from a reusable
1056 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1059 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1061 /* If this is the main symbol file we have to clean up all users of the
1062 old main symbol file. Otherwise it is sufficient to fixup all the
1063 breakpoints that may have been redefined by this symbol file. */
1064 if (add_flags
& SYMFILE_MAINLINE
)
1066 /* OK, make it the "real" symbol file. */
1067 symfile_objfile
= objfile
;
1069 clear_symtab_users (add_flags
);
1071 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1073 breakpoint_re_set ();
1076 /* We're done reading the symbol file; finish off complaints. */
1077 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1080 /* Process a symbol file, as either the main file or as a dynamically
1083 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1084 A new reference is acquired by this function.
1086 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1087 extra, such as dynamically loaded code, and what to do with breakpoins.
1089 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1090 syms_from_objfile, above.
1091 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1093 PARENT is the original objfile if ABFD is a separate debug info file.
1094 Otherwise PARENT is NULL.
1096 Upon success, returns a pointer to the objfile that was added.
1097 Upon failure, jumps back to command level (never returns). */
1099 static struct objfile
*
1100 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1102 struct section_addr_info
*addrs
,
1103 struct section_offsets
*offsets
,
1105 int flags
, struct objfile
*parent
)
1107 struct objfile
*objfile
;
1108 const char *name
= bfd_get_filename (abfd
);
1109 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1110 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1111 const int should_print
= ((from_tty
|| info_verbose
)
1112 && (readnow_symbol_files
1113 || (add_flags
& SYMFILE_NO_READ
) == 0));
1115 if (readnow_symbol_files
)
1117 flags
|= OBJF_READNOW
;
1118 add_flags
&= ~SYMFILE_NO_READ
;
1121 /* Give user a chance to burp if we'd be
1122 interactively wiping out any existing symbols. */
1124 if ((have_full_symbols () || have_partial_symbols ())
1127 && !query (_("Load new symbol table from \"%s\"? "), name
))
1128 error (_("Not confirmed."));
1130 objfile
= allocate_objfile (abfd
, flags
| (mainline
? OBJF_MAINLINE
: 0));
1133 add_separate_debug_objfile (objfile
, parent
);
1135 /* We either created a new mapped symbol table, mapped an existing
1136 symbol table file which has not had initial symbol reading
1137 performed, or need to read an unmapped symbol table. */
1140 if (deprecated_pre_add_symbol_hook
)
1141 deprecated_pre_add_symbol_hook (name
);
1144 printf_unfiltered (_("Reading symbols from %s..."), name
);
1146 gdb_flush (gdb_stdout
);
1149 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1152 /* We now have at least a partial symbol table. Check to see if the
1153 user requested that all symbols be read on initial access via either
1154 the gdb startup command line or on a per symbol file basis. Expand
1155 all partial symbol tables for this objfile if so. */
1157 if ((flags
& OBJF_READNOW
))
1161 printf_unfiltered (_("expanding to full symbols..."));
1163 gdb_flush (gdb_stdout
);
1167 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1170 if (should_print
&& !objfile_has_symbols (objfile
))
1173 printf_unfiltered (_("(no debugging symbols found)..."));
1179 if (deprecated_post_add_symbol_hook
)
1180 deprecated_post_add_symbol_hook ();
1182 printf_unfiltered (_("done.\n"));
1185 /* We print some messages regardless of whether 'from_tty ||
1186 info_verbose' is true, so make sure they go out at the right
1188 gdb_flush (gdb_stdout
);
1190 if (objfile
->sf
== NULL
)
1192 observer_notify_new_objfile (objfile
);
1193 return objfile
; /* No symbols. */
1196 new_symfile_objfile (objfile
, add_flags
);
1198 observer_notify_new_objfile (objfile
);
1200 bfd_cache_close_all ();
1204 /* Add BFD as a separate debug file for OBJFILE. */
1207 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1209 struct objfile
*new_objfile
;
1210 struct section_addr_info
*sap
;
1211 struct cleanup
*my_cleanup
;
1213 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1214 because sections of BFD may not match sections of OBJFILE and because
1215 vma may have been modified by tools such as prelink. */
1216 sap
= build_section_addr_info_from_objfile (objfile
);
1217 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1219 new_objfile
= symbol_file_add_with_addrs_or_offsets
1220 (bfd
, symfile_flags
,
1222 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1226 do_cleanups (my_cleanup
);
1229 /* Process the symbol file ABFD, as either the main file or as a
1230 dynamically loaded file.
1232 See symbol_file_add_with_addrs_or_offsets's comments for
1235 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1236 struct section_addr_info
*addrs
,
1237 int flags
, struct objfile
*parent
)
1239 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1244 /* Process a symbol file, as either the main file or as a dynamically
1245 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1248 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1251 bfd
*bfd
= symfile_bfd_open (name
);
1252 struct cleanup
*cleanup
= make_cleanup_bfd_unref (bfd
);
1253 struct objfile
*objf
;
1255 objf
= symbol_file_add_from_bfd (bfd
, add_flags
, addrs
, flags
, NULL
);
1256 do_cleanups (cleanup
);
1261 /* Call symbol_file_add() with default values and update whatever is
1262 affected by the loading of a new main().
1263 Used when the file is supplied in the gdb command line
1264 and by some targets with special loading requirements.
1265 The auxiliary function, symbol_file_add_main_1(), has the flags
1266 argument for the switches that can only be specified in the symbol_file
1270 symbol_file_add_main (char *args
, int from_tty
)
1272 symbol_file_add_main_1 (args
, from_tty
, 0);
1276 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1278 const int add_flags
= (current_inferior ()->symfile_flags
1279 | SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0));
1281 symbol_file_add (args
, add_flags
, NULL
, flags
);
1283 /* Getting new symbols may change our opinion about
1284 what is frameless. */
1285 reinit_frame_cache ();
1287 if ((flags
& SYMFILE_NO_READ
) == 0)
1288 set_initial_language ();
1292 symbol_file_clear (int from_tty
)
1294 if ((have_full_symbols () || have_partial_symbols ())
1297 ? !query (_("Discard symbol table from `%s'? "),
1298 symfile_objfile
->name
)
1299 : !query (_("Discard symbol table? "))))
1300 error (_("Not confirmed."));
1302 /* solib descriptors may have handles to objfiles. Wipe them before their
1303 objfiles get stale by free_all_objfiles. */
1304 no_shared_libraries (NULL
, from_tty
);
1306 free_all_objfiles ();
1308 gdb_assert (symfile_objfile
== NULL
);
1310 printf_unfiltered (_("No symbol file now.\n"));
1314 separate_debug_file_exists (const char *name
, unsigned long crc
,
1315 struct objfile
*parent_objfile
)
1317 unsigned long file_crc
;
1320 struct stat parent_stat
, abfd_stat
;
1321 int verified_as_different
;
1323 /* Find a separate debug info file as if symbols would be present in
1324 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1325 section can contain just the basename of PARENT_OBJFILE without any
1326 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1327 the separate debug infos with the same basename can exist. */
1329 if (filename_cmp (name
, parent_objfile
->name
) == 0)
1332 abfd
= gdb_bfd_open_maybe_remote (name
);
1337 /* Verify symlinks were not the cause of filename_cmp name difference above.
1339 Some operating systems, e.g. Windows, do not provide a meaningful
1340 st_ino; they always set it to zero. (Windows does provide a
1341 meaningful st_dev.) Do not indicate a duplicate library in that
1342 case. While there is no guarantee that a system that provides
1343 meaningful inode numbers will never set st_ino to zero, this is
1344 merely an optimization, so we do not need to worry about false
1347 if (bfd_stat (abfd
, &abfd_stat
) == 0
1348 && abfd_stat
.st_ino
!= 0
1349 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1351 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1352 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1354 gdb_bfd_unref (abfd
);
1357 verified_as_different
= 1;
1360 verified_as_different
= 0;
1362 file_crc_p
= gdb_bfd_crc (abfd
, &file_crc
);
1364 gdb_bfd_unref (abfd
);
1369 if (crc
!= file_crc
)
1371 unsigned long parent_crc
;
1373 /* If one (or both) the files are accessed for example the via "remote:"
1374 gdbserver way it does not support the bfd_stat operation. Verify
1375 whether those two files are not the same manually. */
1377 if (!verified_as_different
)
1379 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1383 if (verified_as_different
|| parent_crc
!= file_crc
)
1384 warning (_("the debug information found in \"%s\""
1385 " does not match \"%s\" (CRC mismatch).\n"),
1386 name
, parent_objfile
->name
);
1394 char *debug_file_directory
= NULL
;
1396 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1397 struct cmd_list_element
*c
, const char *value
)
1399 fprintf_filtered (file
,
1400 _("The directory where separate debug "
1401 "symbols are searched for is \"%s\".\n"),
1405 #if ! defined (DEBUG_SUBDIRECTORY)
1406 #define DEBUG_SUBDIRECTORY ".debug"
1409 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1410 where the original file resides (may not be the same as
1411 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1412 looking for. CANON_DIR is the "realpath" form of DIR.
1413 DIR must contain a trailing '/'.
1414 Returns the path of the file with separate debug info, of NULL. */
1417 find_separate_debug_file (const char *dir
,
1418 const char *canon_dir
,
1419 const char *debuglink
,
1420 unsigned long crc32
, struct objfile
*objfile
)
1425 VEC (char_ptr
) *debugdir_vec
;
1426 struct cleanup
*back_to
;
1429 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1431 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1432 i
= strlen (canon_dir
);
1434 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1436 + strlen (DEBUG_SUBDIRECTORY
)
1438 + strlen (debuglink
)
1441 /* First try in the same directory as the original file. */
1442 strcpy (debugfile
, dir
);
1443 strcat (debugfile
, debuglink
);
1445 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1448 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1449 strcpy (debugfile
, dir
);
1450 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1451 strcat (debugfile
, "/");
1452 strcat (debugfile
, debuglink
);
1454 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1457 /* Then try in the global debugfile directories.
1459 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1460 cause "/..." lookups. */
1462 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1463 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1465 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1467 strcpy (debugfile
, debugdir
);
1468 strcat (debugfile
, "/");
1469 strcat (debugfile
, dir
);
1470 strcat (debugfile
, debuglink
);
1472 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1475 /* If the file is in the sysroot, try using its base path in the
1476 global debugfile directory. */
1477 if (canon_dir
!= NULL
1478 && filename_ncmp (canon_dir
, gdb_sysroot
,
1479 strlen (gdb_sysroot
)) == 0
1480 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1482 strcpy (debugfile
, debugdir
);
1483 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1484 strcat (debugfile
, "/");
1485 strcat (debugfile
, debuglink
);
1487 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1492 do_cleanups (back_to
);
1497 /* Modify PATH to contain only "[/]directory/" part of PATH.
1498 If there were no directory separators in PATH, PATH will be empty
1499 string on return. */
1502 terminate_after_last_dir_separator (char *path
)
1506 /* Strip off the final filename part, leaving the directory name,
1507 followed by a slash. The directory can be relative or absolute. */
1508 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1509 if (IS_DIR_SEPARATOR (path
[i
]))
1512 /* If I is -1 then no directory is present there and DIR will be "". */
1516 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1517 Returns pathname, or NULL. */
1520 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1523 char *dir
, *canon_dir
;
1525 unsigned long crc32
;
1526 struct cleanup
*cleanups
;
1528 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1530 if (debuglink
== NULL
)
1532 /* There's no separate debug info, hence there's no way we could
1533 load it => no warning. */
1537 cleanups
= make_cleanup (xfree
, debuglink
);
1538 dir
= xstrdup (objfile
->name
);
1539 make_cleanup (xfree
, dir
);
1540 terminate_after_last_dir_separator (dir
);
1541 canon_dir
= lrealpath (dir
);
1543 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1547 if (debugfile
== NULL
)
1550 /* For PR gdb/9538, try again with realpath (if different from the
1555 if (lstat (objfile
->name
, &st_buf
) == 0 && S_ISLNK(st_buf
.st_mode
))
1559 symlink_dir
= lrealpath (objfile
->name
);
1560 if (symlink_dir
!= NULL
)
1562 make_cleanup (xfree
, symlink_dir
);
1563 terminate_after_last_dir_separator (symlink_dir
);
1564 if (strcmp (dir
, symlink_dir
) != 0)
1566 /* Different directory, so try using it. */
1567 debugfile
= find_separate_debug_file (symlink_dir
,
1575 #endif /* HAVE_LSTAT */
1578 do_cleanups (cleanups
);
1583 /* This is the symbol-file command. Read the file, analyze its
1584 symbols, and add a struct symtab to a symtab list. The syntax of
1585 the command is rather bizarre:
1587 1. The function buildargv implements various quoting conventions
1588 which are undocumented and have little or nothing in common with
1589 the way things are quoted (or not quoted) elsewhere in GDB.
1591 2. Options are used, which are not generally used in GDB (perhaps
1592 "set mapped on", "set readnow on" would be better)
1594 3. The order of options matters, which is contrary to GNU
1595 conventions (because it is confusing and inconvenient). */
1598 symbol_file_command (char *args
, int from_tty
)
1604 symbol_file_clear (from_tty
);
1608 char **argv
= gdb_buildargv (args
);
1609 int flags
= OBJF_USERLOADED
;
1610 struct cleanup
*cleanups
;
1613 cleanups
= make_cleanup_freeargv (argv
);
1614 while (*argv
!= NULL
)
1616 if (strcmp (*argv
, "-readnow") == 0)
1617 flags
|= OBJF_READNOW
;
1618 else if (**argv
== '-')
1619 error (_("unknown option `%s'"), *argv
);
1622 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1630 error (_("no symbol file name was specified"));
1632 do_cleanups (cleanups
);
1636 /* Set the initial language.
1638 FIXME: A better solution would be to record the language in the
1639 psymtab when reading partial symbols, and then use it (if known) to
1640 set the language. This would be a win for formats that encode the
1641 language in an easily discoverable place, such as DWARF. For
1642 stabs, we can jump through hoops looking for specially named
1643 symbols or try to intuit the language from the specific type of
1644 stabs we find, but we can't do that until later when we read in
1648 set_initial_language (void)
1650 enum language lang
= language_unknown
;
1652 if (language_of_main
!= language_unknown
)
1653 lang
= language_of_main
;
1656 const char *filename
;
1658 filename
= find_main_filename ();
1659 if (filename
!= NULL
)
1660 lang
= deduce_language_from_filename (filename
);
1663 if (lang
== language_unknown
)
1665 /* Make C the default language */
1669 set_language (lang
);
1670 expected_language
= current_language
; /* Don't warn the user. */
1673 /* If NAME is a remote name open the file using remote protocol, otherwise
1674 open it normally. Returns a new reference to the BFD. On error,
1675 returns NULL with the BFD error set. */
1678 gdb_bfd_open_maybe_remote (const char *name
)
1682 if (remote_filename_p (name
))
1683 result
= remote_bfd_open (name
, gnutarget
);
1685 result
= gdb_bfd_open (name
, gnutarget
, -1);
1691 /* Open the file specified by NAME and hand it off to BFD for
1692 preliminary analysis. Return a newly initialized bfd *, which
1693 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1694 absolute). In case of trouble, error() is called. */
1697 symfile_bfd_open (char *name
)
1701 char *absolute_name
;
1703 if (remote_filename_p (name
))
1705 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1707 error (_("`%s': can't open to read symbols: %s."), name
,
1708 bfd_errmsg (bfd_get_error ()));
1710 if (!bfd_check_format (sym_bfd
, bfd_object
))
1712 make_cleanup_bfd_unref (sym_bfd
);
1713 error (_("`%s': can't read symbols: %s."), name
,
1714 bfd_errmsg (bfd_get_error ()));
1720 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1722 /* Look down path for it, allocate 2nd new malloc'd copy. */
1723 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1724 O_RDONLY
| O_BINARY
, &absolute_name
);
1725 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1728 char *exename
= alloca (strlen (name
) + 5);
1730 strcat (strcpy (exename
, name
), ".exe");
1731 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1732 O_RDONLY
| O_BINARY
, &absolute_name
);
1737 make_cleanup (xfree
, name
);
1738 perror_with_name (name
);
1742 name
= absolute_name
;
1743 make_cleanup (xfree
, name
);
1745 sym_bfd
= gdb_bfd_open (name
, gnutarget
, desc
);
1748 make_cleanup (xfree
, name
);
1749 error (_("`%s': can't open to read symbols: %s."), name
,
1750 bfd_errmsg (bfd_get_error ()));
1752 bfd_set_cacheable (sym_bfd
, 1);
1754 if (!bfd_check_format (sym_bfd
, bfd_object
))
1756 make_cleanup_bfd_unref (sym_bfd
);
1757 error (_("`%s': can't read symbols: %s."), name
,
1758 bfd_errmsg (bfd_get_error ()));
1764 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1765 the section was not found. */
1768 get_section_index (struct objfile
*objfile
, char *section_name
)
1770 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1778 /* Link SF into the global symtab_fns list. Called on startup by the
1779 _initialize routine in each object file format reader, to register
1780 information about each format the reader is prepared to handle. */
1783 add_symtab_fns (const struct sym_fns
*sf
)
1785 VEC_safe_push (sym_fns_ptr
, symtab_fns
, sf
);
1788 /* Initialize OBJFILE to read symbols from its associated BFD. It
1789 either returns or calls error(). The result is an initialized
1790 struct sym_fns in the objfile structure, that contains cached
1791 information about the symbol file. */
1793 static const struct sym_fns
*
1794 find_sym_fns (bfd
*abfd
)
1796 const struct sym_fns
*sf
;
1797 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1800 if (our_flavour
== bfd_target_srec_flavour
1801 || our_flavour
== bfd_target_ihex_flavour
1802 || our_flavour
== bfd_target_tekhex_flavour
)
1803 return NULL
; /* No symbols. */
1805 for (i
= 0; VEC_iterate (sym_fns_ptr
, symtab_fns
, i
, sf
); ++i
)
1806 if (our_flavour
== sf
->sym_flavour
)
1809 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1810 bfd_get_target (abfd
));
1814 /* This function runs the load command of our current target. */
1817 load_command (char *arg
, int from_tty
)
1821 /* The user might be reloading because the binary has changed. Take
1822 this opportunity to check. */
1823 reopen_exec_file ();
1831 parg
= arg
= get_exec_file (1);
1833 /* Count how many \ " ' tab space there are in the name. */
1834 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1842 /* We need to quote this string so buildargv can pull it apart. */
1843 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1847 make_cleanup (xfree
, temp
);
1850 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1852 strncpy (ptemp
, prev
, parg
- prev
);
1853 ptemp
+= parg
- prev
;
1857 strcpy (ptemp
, prev
);
1863 target_load (arg
, from_tty
);
1865 /* After re-loading the executable, we don't really know which
1866 overlays are mapped any more. */
1867 overlay_cache_invalid
= 1;
1870 /* This version of "load" should be usable for any target. Currently
1871 it is just used for remote targets, not inftarg.c or core files,
1872 on the theory that only in that case is it useful.
1874 Avoiding xmodem and the like seems like a win (a) because we don't have
1875 to worry about finding it, and (b) On VMS, fork() is very slow and so
1876 we don't want to run a subprocess. On the other hand, I'm not sure how
1877 performance compares. */
1879 static int validate_download
= 0;
1881 /* Callback service function for generic_load (bfd_map_over_sections). */
1884 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1886 bfd_size_type
*sum
= data
;
1888 *sum
+= bfd_get_section_size (asec
);
1891 /* Opaque data for load_section_callback. */
1892 struct load_section_data
{
1893 CORE_ADDR load_offset
;
1894 struct load_progress_data
*progress_data
;
1895 VEC(memory_write_request_s
) *requests
;
1898 /* Opaque data for load_progress. */
1899 struct load_progress_data
{
1900 /* Cumulative data. */
1901 unsigned long write_count
;
1902 unsigned long data_count
;
1903 bfd_size_type total_size
;
1906 /* Opaque data for load_progress for a single section. */
1907 struct load_progress_section_data
{
1908 struct load_progress_data
*cumulative
;
1910 /* Per-section data. */
1911 const char *section_name
;
1912 ULONGEST section_sent
;
1913 ULONGEST section_size
;
1918 /* Target write callback routine for progress reporting. */
1921 load_progress (ULONGEST bytes
, void *untyped_arg
)
1923 struct load_progress_section_data
*args
= untyped_arg
;
1924 struct load_progress_data
*totals
;
1927 /* Writing padding data. No easy way to get at the cumulative
1928 stats, so just ignore this. */
1931 totals
= args
->cumulative
;
1933 if (bytes
== 0 && args
->section_sent
== 0)
1935 /* The write is just starting. Let the user know we've started
1937 ui_out_message (current_uiout
, 0, "Loading section %s, size %s lma %s\n",
1938 args
->section_name
, hex_string (args
->section_size
),
1939 paddress (target_gdbarch (), args
->lma
));
1943 if (validate_download
)
1945 /* Broken memories and broken monitors manifest themselves here
1946 when bring new computers to life. This doubles already slow
1948 /* NOTE: cagney/1999-10-18: A more efficient implementation
1949 might add a verify_memory() method to the target vector and
1950 then use that. remote.c could implement that method using
1951 the ``qCRC'' packet. */
1952 gdb_byte
*check
= xmalloc (bytes
);
1953 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1955 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1956 error (_("Download verify read failed at %s"),
1957 paddress (target_gdbarch (), args
->lma
));
1958 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1959 error (_("Download verify compare failed at %s"),
1960 paddress (target_gdbarch (), args
->lma
));
1961 do_cleanups (verify_cleanups
);
1963 totals
->data_count
+= bytes
;
1965 args
->buffer
+= bytes
;
1966 totals
->write_count
+= 1;
1967 args
->section_sent
+= bytes
;
1968 if (check_quit_flag ()
1969 || (deprecated_ui_load_progress_hook
!= NULL
1970 && deprecated_ui_load_progress_hook (args
->section_name
,
1971 args
->section_sent
)))
1972 error (_("Canceled the download"));
1974 if (deprecated_show_load_progress
!= NULL
)
1975 deprecated_show_load_progress (args
->section_name
,
1979 totals
->total_size
);
1982 /* Callback service function for generic_load (bfd_map_over_sections). */
1985 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1987 struct memory_write_request
*new_request
;
1988 struct load_section_data
*args
= data
;
1989 struct load_progress_section_data
*section_data
;
1990 bfd_size_type size
= bfd_get_section_size (asec
);
1992 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1994 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
2000 new_request
= VEC_safe_push (memory_write_request_s
,
2001 args
->requests
, NULL
);
2002 memset (new_request
, 0, sizeof (struct memory_write_request
));
2003 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
2004 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
2005 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
2007 new_request
->data
= xmalloc (size
);
2008 new_request
->baton
= section_data
;
2010 buffer
= new_request
->data
;
2012 section_data
->cumulative
= args
->progress_data
;
2013 section_data
->section_name
= sect_name
;
2014 section_data
->section_size
= size
;
2015 section_data
->lma
= new_request
->begin
;
2016 section_data
->buffer
= buffer
;
2018 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2021 /* Clean up an entire memory request vector, including load
2022 data and progress records. */
2025 clear_memory_write_data (void *arg
)
2027 VEC(memory_write_request_s
) **vec_p
= arg
;
2028 VEC(memory_write_request_s
) *vec
= *vec_p
;
2030 struct memory_write_request
*mr
;
2032 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2037 VEC_free (memory_write_request_s
, vec
);
2041 generic_load (char *args
, int from_tty
)
2044 struct timeval start_time
, end_time
;
2046 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2047 struct load_section_data cbdata
;
2048 struct load_progress_data total_progress
;
2049 struct ui_out
*uiout
= current_uiout
;
2054 memset (&cbdata
, 0, sizeof (cbdata
));
2055 memset (&total_progress
, 0, sizeof (total_progress
));
2056 cbdata
.progress_data
= &total_progress
;
2058 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2061 error_no_arg (_("file to load"));
2063 argv
= gdb_buildargv (args
);
2064 make_cleanup_freeargv (argv
);
2066 filename
= tilde_expand (argv
[0]);
2067 make_cleanup (xfree
, filename
);
2069 if (argv
[1] != NULL
)
2073 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2075 /* If the last word was not a valid number then
2076 treat it as a file name with spaces in. */
2077 if (argv
[1] == endptr
)
2078 error (_("Invalid download offset:%s."), argv
[1]);
2080 if (argv
[2] != NULL
)
2081 error (_("Too many parameters."));
2084 /* Open the file for loading. */
2085 loadfile_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2086 if (loadfile_bfd
== NULL
)
2088 perror_with_name (filename
);
2092 make_cleanup_bfd_unref (loadfile_bfd
);
2094 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2096 error (_("\"%s\" is not an object file: %s"), filename
,
2097 bfd_errmsg (bfd_get_error ()));
2100 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2101 (void *) &total_progress
.total_size
);
2103 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2105 gettimeofday (&start_time
, NULL
);
2107 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2108 load_progress
) != 0)
2109 error (_("Load failed"));
2111 gettimeofday (&end_time
, NULL
);
2113 entry
= bfd_get_start_address (loadfile_bfd
);
2114 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2115 ui_out_text (uiout
, "Start address ");
2116 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch (), entry
));
2117 ui_out_text (uiout
, ", load size ");
2118 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2119 ui_out_text (uiout
, "\n");
2120 /* We were doing this in remote-mips.c, I suspect it is right
2121 for other targets too. */
2122 regcache_write_pc (get_current_regcache (), entry
);
2124 /* Reset breakpoints, now that we have changed the load image. For
2125 instance, breakpoints may have been set (or reset, by
2126 post_create_inferior) while connected to the target but before we
2127 loaded the program. In that case, the prologue analyzer could
2128 have read instructions from the target to find the right
2129 breakpoint locations. Loading has changed the contents of that
2132 breakpoint_re_set ();
2134 /* FIXME: are we supposed to call symbol_file_add or not? According
2135 to a comment from remote-mips.c (where a call to symbol_file_add
2136 was commented out), making the call confuses GDB if more than one
2137 file is loaded in. Some targets do (e.g., remote-vx.c) but
2138 others don't (or didn't - perhaps they have all been deleted). */
2140 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2141 total_progress
.write_count
,
2142 &start_time
, &end_time
);
2144 do_cleanups (old_cleanups
);
2147 /* Report how fast the transfer went. */
2150 print_transfer_performance (struct ui_file
*stream
,
2151 unsigned long data_count
,
2152 unsigned long write_count
,
2153 const struct timeval
*start_time
,
2154 const struct timeval
*end_time
)
2156 ULONGEST time_count
;
2157 struct ui_out
*uiout
= current_uiout
;
2159 /* Compute the elapsed time in milliseconds, as a tradeoff between
2160 accuracy and overflow. */
2161 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2162 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2164 ui_out_text (uiout
, "Transfer rate: ");
2167 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2169 if (ui_out_is_mi_like_p (uiout
))
2171 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2172 ui_out_text (uiout
, " bits/sec");
2174 else if (rate
< 1024)
2176 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2177 ui_out_text (uiout
, " bytes/sec");
2181 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2182 ui_out_text (uiout
, " KB/sec");
2187 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2188 ui_out_text (uiout
, " bits in <1 sec");
2190 if (write_count
> 0)
2192 ui_out_text (uiout
, ", ");
2193 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2194 ui_out_text (uiout
, " bytes/write");
2196 ui_out_text (uiout
, ".\n");
2199 /* This function allows the addition of incrementally linked object files.
2200 It does not modify any state in the target, only in the debugger. */
2201 /* Note: ezannoni 2000-04-13 This function/command used to have a
2202 special case syntax for the rombug target (Rombug is the boot
2203 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2204 rombug case, the user doesn't need to supply a text address,
2205 instead a call to target_link() (in target.c) would supply the
2206 value to use. We are now discontinuing this type of ad hoc syntax. */
2209 add_symbol_file_command (char *args
, int from_tty
)
2211 struct gdbarch
*gdbarch
= get_current_arch ();
2212 char *filename
= NULL
;
2213 int flags
= OBJF_USERLOADED
;
2215 int section_index
= 0;
2219 int expecting_sec_name
= 0;
2220 int expecting_sec_addr
= 0;
2229 struct section_addr_info
*section_addrs
;
2230 struct sect_opt
*sect_opts
= NULL
;
2231 size_t num_sect_opts
= 0;
2232 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2235 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2236 * sizeof (struct sect_opt
));
2241 error (_("add-symbol-file takes a file name and an address"));
2243 argv
= gdb_buildargv (args
);
2244 make_cleanup_freeargv (argv
);
2246 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2248 /* Process the argument. */
2251 /* The first argument is the file name. */
2252 filename
= tilde_expand (arg
);
2253 make_cleanup (xfree
, filename
);
2258 /* The second argument is always the text address at which
2259 to load the program. */
2260 sect_opts
[section_index
].name
= ".text";
2261 sect_opts
[section_index
].value
= arg
;
2262 if (++section_index
>= num_sect_opts
)
2265 sect_opts
= ((struct sect_opt
*)
2266 xrealloc (sect_opts
,
2268 * sizeof (struct sect_opt
)));
2273 /* It's an option (starting with '-') or it's an argument
2278 if (strcmp (arg
, "-readnow") == 0)
2279 flags
|= OBJF_READNOW
;
2280 else if (strcmp (arg
, "-s") == 0)
2282 expecting_sec_name
= 1;
2283 expecting_sec_addr
= 1;
2288 if (expecting_sec_name
)
2290 sect_opts
[section_index
].name
= arg
;
2291 expecting_sec_name
= 0;
2294 if (expecting_sec_addr
)
2296 sect_opts
[section_index
].value
= arg
;
2297 expecting_sec_addr
= 0;
2298 if (++section_index
>= num_sect_opts
)
2301 sect_opts
= ((struct sect_opt
*)
2302 xrealloc (sect_opts
,
2304 * sizeof (struct sect_opt
)));
2308 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2309 " [-readnow] [-s <secname> <addr>]*"));
2314 /* This command takes at least two arguments. The first one is a
2315 filename, and the second is the address where this file has been
2316 loaded. Abort now if this address hasn't been provided by the
2318 if (section_index
< 1)
2319 error (_("The address where %s has been loaded is missing"), filename
);
2321 /* Print the prompt for the query below. And save the arguments into
2322 a sect_addr_info structure to be passed around to other
2323 functions. We have to split this up into separate print
2324 statements because hex_string returns a local static
2327 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2328 section_addrs
= alloc_section_addr_info (section_index
);
2329 make_cleanup (xfree
, section_addrs
);
2330 for (i
= 0; i
< section_index
; i
++)
2333 char *val
= sect_opts
[i
].value
;
2334 char *sec
= sect_opts
[i
].name
;
2336 addr
= parse_and_eval_address (val
);
2338 /* Here we store the section offsets in the order they were
2339 entered on the command line. */
2340 section_addrs
->other
[sec_num
].name
= sec
;
2341 section_addrs
->other
[sec_num
].addr
= addr
;
2342 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2343 paddress (gdbarch
, addr
));
2346 /* The object's sections are initialized when a
2347 call is made to build_objfile_section_table (objfile).
2348 This happens in reread_symbols.
2349 At this point, we don't know what file type this is,
2350 so we can't determine what section names are valid. */
2352 section_addrs
->num_sections
= sec_num
;
2354 if (from_tty
&& (!query ("%s", "")))
2355 error (_("Not confirmed."));
2357 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2358 section_addrs
, flags
);
2360 /* Getting new symbols may change our opinion about what is
2362 reinit_frame_cache ();
2363 do_cleanups (my_cleanups
);
2367 typedef struct objfile
*objfilep
;
2369 DEF_VEC_P (objfilep
);
2371 /* Re-read symbols if a symbol-file has changed. */
2373 reread_symbols (void)
2375 struct objfile
*objfile
;
2377 struct stat new_statbuf
;
2379 VEC (objfilep
) *new_objfiles
= NULL
;
2380 struct cleanup
*all_cleanups
;
2382 all_cleanups
= make_cleanup (VEC_cleanup (objfilep
), &new_objfiles
);
2384 /* With the addition of shared libraries, this should be modified,
2385 the load time should be saved in the partial symbol tables, since
2386 different tables may come from different source files. FIXME.
2387 This routine should then walk down each partial symbol table
2388 and see if the symbol table that it originates from has been changed. */
2390 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2392 /* solib-sunos.c creates one objfile with obfd. */
2393 if (objfile
->obfd
== NULL
)
2396 /* Separate debug objfiles are handled in the main objfile. */
2397 if (objfile
->separate_debug_objfile_backlink
)
2400 /* If this object is from an archive (what you usually create with
2401 `ar', often called a `static library' on most systems, though
2402 a `shared library' on AIX is also an archive), then you should
2403 stat on the archive name, not member name. */
2404 if (objfile
->obfd
->my_archive
)
2405 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2407 res
= stat (objfile
->name
, &new_statbuf
);
2410 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2411 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2415 new_modtime
= new_statbuf
.st_mtime
;
2416 if (new_modtime
!= objfile
->mtime
)
2418 struct cleanup
*old_cleanups
;
2419 struct section_offsets
*offsets
;
2421 char *obfd_filename
;
2423 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2426 /* There are various functions like symbol_file_add,
2427 symfile_bfd_open, syms_from_objfile, etc., which might
2428 appear to do what we want. But they have various other
2429 effects which we *don't* want. So we just do stuff
2430 ourselves. We don't worry about mapped files (for one thing,
2431 any mapped file will be out of date). */
2433 /* If we get an error, blow away this objfile (not sure if
2434 that is the correct response for things like shared
2436 old_cleanups
= make_cleanup_free_objfile (objfile
);
2437 /* We need to do this whenever any symbols go away. */
2438 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2440 if (exec_bfd
!= NULL
2441 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2442 bfd_get_filename (exec_bfd
)) == 0)
2444 /* Reload EXEC_BFD without asking anything. */
2446 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2449 /* Keep the calls order approx. the same as in free_objfile. */
2451 /* Free the separate debug objfiles. It will be
2452 automatically recreated by sym_read. */
2453 free_objfile_separate_debug (objfile
);
2455 /* Remove any references to this objfile in the global
2457 preserve_values (objfile
);
2459 /* Nuke all the state that we will re-read. Much of the following
2460 code which sets things to NULL really is necessary to tell
2461 other parts of GDB that there is nothing currently there.
2463 Try to keep the freeing order compatible with free_objfile. */
2465 if (objfile
->sf
!= NULL
)
2467 (*objfile
->sf
->sym_finish
) (objfile
);
2470 clear_objfile_data (objfile
);
2472 /* Clean up any state BFD has sitting around. */
2474 struct bfd
*obfd
= objfile
->obfd
;
2476 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2477 /* Open the new BFD before freeing the old one, so that
2478 the filename remains live. */
2479 objfile
->obfd
= gdb_bfd_open_maybe_remote (obfd_filename
);
2480 if (objfile
->obfd
== NULL
)
2482 /* We have to make a cleanup and error here, rather
2483 than erroring later, because once we unref OBFD,
2484 OBFD_FILENAME will be freed. */
2485 make_cleanup_bfd_unref (obfd
);
2486 error (_("Can't open %s to read symbols."), obfd_filename
);
2488 gdb_bfd_unref (obfd
);
2491 objfile
->name
= bfd_get_filename (objfile
->obfd
);
2492 /* bfd_openr sets cacheable to true, which is what we want. */
2493 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2494 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2495 bfd_errmsg (bfd_get_error ()));
2497 /* Save the offsets, we will nuke them with the rest of the
2499 num_offsets
= objfile
->num_sections
;
2500 offsets
= ((struct section_offsets
*)
2501 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2502 memcpy (offsets
, objfile
->section_offsets
,
2503 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2505 /* FIXME: Do we have to free a whole linked list, or is this
2507 if (objfile
->global_psymbols
.list
)
2508 xfree (objfile
->global_psymbols
.list
);
2509 memset (&objfile
->global_psymbols
, 0,
2510 sizeof (objfile
->global_psymbols
));
2511 if (objfile
->static_psymbols
.list
)
2512 xfree (objfile
->static_psymbols
.list
);
2513 memset (&objfile
->static_psymbols
, 0,
2514 sizeof (objfile
->static_psymbols
));
2516 /* Free the obstacks for non-reusable objfiles. */
2517 psymbol_bcache_free (objfile
->psymbol_cache
);
2518 objfile
->psymbol_cache
= psymbol_bcache_init ();
2519 if (objfile
->demangled_names_hash
!= NULL
)
2521 htab_delete (objfile
->demangled_names_hash
);
2522 objfile
->demangled_names_hash
= NULL
;
2524 obstack_free (&objfile
->objfile_obstack
, 0);
2525 objfile
->sections
= NULL
;
2526 objfile
->symtabs
= NULL
;
2527 objfile
->psymtabs
= NULL
;
2528 objfile
->psymtabs_addrmap
= NULL
;
2529 objfile
->free_psymtabs
= NULL
;
2530 objfile
->template_symbols
= NULL
;
2531 objfile
->msymbols
= NULL
;
2532 objfile
->minimal_symbol_count
= 0;
2533 memset (&objfile
->msymbol_hash
, 0,
2534 sizeof (objfile
->msymbol_hash
));
2535 memset (&objfile
->msymbol_demangled_hash
, 0,
2536 sizeof (objfile
->msymbol_demangled_hash
));
2538 set_objfile_per_bfd (objfile
);
2540 /* obstack_init also initializes the obstack so it is
2541 empty. We could use obstack_specify_allocation but
2542 gdb_obstack.h specifies the alloc/dealloc functions. */
2543 obstack_init (&objfile
->objfile_obstack
);
2544 build_objfile_section_table (objfile
);
2545 terminate_minimal_symbol_table (objfile
);
2547 /* We use the same section offsets as from last time. I'm not
2548 sure whether that is always correct for shared libraries. */
2549 objfile
->section_offsets
= (struct section_offsets
*)
2550 obstack_alloc (&objfile
->objfile_obstack
,
2551 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2552 memcpy (objfile
->section_offsets
, offsets
,
2553 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2554 objfile
->num_sections
= num_offsets
;
2556 /* What the hell is sym_new_init for, anyway? The concept of
2557 distinguishing between the main file and additional files
2558 in this way seems rather dubious. */
2559 if (objfile
== symfile_objfile
)
2561 (*objfile
->sf
->sym_new_init
) (objfile
);
2564 (*objfile
->sf
->sym_init
) (objfile
);
2565 clear_complaints (&symfile_complaints
, 1, 1);
2567 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2568 read_symbols (objfile
, 0);
2570 if (!objfile_has_symbols (objfile
))
2573 printf_unfiltered (_("(no debugging symbols found)\n"));
2577 /* We're done reading the symbol file; finish off complaints. */
2578 clear_complaints (&symfile_complaints
, 0, 1);
2580 /* Getting new symbols may change our opinion about what is
2583 reinit_frame_cache ();
2585 /* Discard cleanups as symbol reading was successful. */
2586 discard_cleanups (old_cleanups
);
2588 /* If the mtime has changed between the time we set new_modtime
2589 and now, we *want* this to be out of date, so don't call stat
2591 objfile
->mtime
= new_modtime
;
2592 init_entry_point_info (objfile
);
2594 VEC_safe_push (objfilep
, new_objfiles
, objfile
);
2602 /* Notify objfiles that we've modified objfile sections. */
2603 objfiles_changed ();
2605 clear_symtab_users (0);
2607 /* clear_objfile_data for each objfile was called before freeing it and
2608 observer_notify_new_objfile (NULL) has been called by
2609 clear_symtab_users above. Notify the new files now. */
2610 for (ix
= 0; VEC_iterate (objfilep
, new_objfiles
, ix
, objfile
); ix
++)
2611 observer_notify_new_objfile (objfile
);
2613 /* At least one objfile has changed, so we can consider that
2614 the executable we're debugging has changed too. */
2615 observer_notify_executable_changed ();
2618 do_cleanups (all_cleanups
);
2630 static filename_language
*filename_language_table
;
2631 static int fl_table_size
, fl_table_next
;
2634 add_filename_language (char *ext
, enum language lang
)
2636 if (fl_table_next
>= fl_table_size
)
2638 fl_table_size
+= 10;
2639 filename_language_table
=
2640 xrealloc (filename_language_table
,
2641 fl_table_size
* sizeof (*filename_language_table
));
2644 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2645 filename_language_table
[fl_table_next
].lang
= lang
;
2649 static char *ext_args
;
2651 show_ext_args (struct ui_file
*file
, int from_tty
,
2652 struct cmd_list_element
*c
, const char *value
)
2654 fprintf_filtered (file
,
2655 _("Mapping between filename extension "
2656 "and source language is \"%s\".\n"),
2661 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2664 char *cp
= ext_args
;
2667 /* First arg is filename extension, starting with '.' */
2669 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2671 /* Find end of first arg. */
2672 while (*cp
&& !isspace (*cp
))
2676 error (_("'%s': two arguments required -- "
2677 "filename extension and language"),
2680 /* Null-terminate first arg. */
2683 /* Find beginning of second arg, which should be a source language. */
2684 cp
= skip_spaces (cp
);
2687 error (_("'%s': two arguments required -- "
2688 "filename extension and language"),
2691 /* Lookup the language from among those we know. */
2692 lang
= language_enum (cp
);
2694 /* Now lookup the filename extension: do we already know it? */
2695 for (i
= 0; i
< fl_table_next
; i
++)
2696 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2699 if (i
>= fl_table_next
)
2701 /* New file extension. */
2702 add_filename_language (ext_args
, lang
);
2706 /* Redefining a previously known filename extension. */
2709 /* query ("Really make files of type %s '%s'?", */
2710 /* ext_args, language_str (lang)); */
2712 xfree (filename_language_table
[i
].ext
);
2713 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2714 filename_language_table
[i
].lang
= lang
;
2719 info_ext_lang_command (char *args
, int from_tty
)
2723 printf_filtered (_("Filename extensions and the languages they represent:"));
2724 printf_filtered ("\n\n");
2725 for (i
= 0; i
< fl_table_next
; i
++)
2726 printf_filtered ("\t%s\t- %s\n",
2727 filename_language_table
[i
].ext
,
2728 language_str (filename_language_table
[i
].lang
));
2732 init_filename_language_table (void)
2734 if (fl_table_size
== 0) /* Protect against repetition. */
2738 filename_language_table
=
2739 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2740 add_filename_language (".c", language_c
);
2741 add_filename_language (".d", language_d
);
2742 add_filename_language (".C", language_cplus
);
2743 add_filename_language (".cc", language_cplus
);
2744 add_filename_language (".cp", language_cplus
);
2745 add_filename_language (".cpp", language_cplus
);
2746 add_filename_language (".cxx", language_cplus
);
2747 add_filename_language (".c++", language_cplus
);
2748 add_filename_language (".java", language_java
);
2749 add_filename_language (".class", language_java
);
2750 add_filename_language (".m", language_objc
);
2751 add_filename_language (".f", language_fortran
);
2752 add_filename_language (".F", language_fortran
);
2753 add_filename_language (".for", language_fortran
);
2754 add_filename_language (".FOR", language_fortran
);
2755 add_filename_language (".ftn", language_fortran
);
2756 add_filename_language (".FTN", language_fortran
);
2757 add_filename_language (".fpp", language_fortran
);
2758 add_filename_language (".FPP", language_fortran
);
2759 add_filename_language (".f90", language_fortran
);
2760 add_filename_language (".F90", language_fortran
);
2761 add_filename_language (".f95", language_fortran
);
2762 add_filename_language (".F95", language_fortran
);
2763 add_filename_language (".f03", language_fortran
);
2764 add_filename_language (".F03", language_fortran
);
2765 add_filename_language (".f08", language_fortran
);
2766 add_filename_language (".F08", language_fortran
);
2767 add_filename_language (".s", language_asm
);
2768 add_filename_language (".sx", language_asm
);
2769 add_filename_language (".S", language_asm
);
2770 add_filename_language (".pas", language_pascal
);
2771 add_filename_language (".p", language_pascal
);
2772 add_filename_language (".pp", language_pascal
);
2773 add_filename_language (".adb", language_ada
);
2774 add_filename_language (".ads", language_ada
);
2775 add_filename_language (".a", language_ada
);
2776 add_filename_language (".ada", language_ada
);
2777 add_filename_language (".dg", language_ada
);
2782 deduce_language_from_filename (const char *filename
)
2787 if (filename
!= NULL
)
2788 if ((cp
= strrchr (filename
, '.')) != NULL
)
2789 for (i
= 0; i
< fl_table_next
; i
++)
2790 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2791 return filename_language_table
[i
].lang
;
2793 return language_unknown
;
2798 Allocate and partly initialize a new symbol table. Return a pointer
2799 to it. error() if no space.
2801 Caller must set these fields:
2810 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2812 struct symtab
*symtab
;
2814 symtab
= (struct symtab
*)
2815 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2816 memset (symtab
, 0, sizeof (*symtab
));
2817 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2818 objfile
->per_bfd
->filename_cache
);
2819 symtab
->fullname
= NULL
;
2820 symtab
->language
= deduce_language_from_filename (filename
);
2821 symtab
->debugformat
= "unknown";
2823 /* Hook it to the objfile it comes from. */
2825 symtab
->objfile
= objfile
;
2826 symtab
->next
= objfile
->symtabs
;
2827 objfile
->symtabs
= symtab
;
2829 if (symtab_create_debug
)
2831 /* Be a bit clever with debugging messages, and don't print objfile
2832 every time, only when it changes. */
2833 static char *last_objfile_name
= NULL
;
2835 if (last_objfile_name
== NULL
2836 || strcmp (last_objfile_name
, objfile
->name
) != 0)
2838 xfree (last_objfile_name
);
2839 last_objfile_name
= xstrdup (objfile
->name
);
2840 fprintf_unfiltered (gdb_stdlog
,
2841 "Creating one or more symtabs for objfile %s ...\n",
2844 fprintf_unfiltered (gdb_stdlog
,
2845 "Created symtab %s for module %s.\n",
2846 host_address_to_string (symtab
), filename
);
2853 /* Reset all data structures in gdb which may contain references to symbol
2854 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2857 clear_symtab_users (int add_flags
)
2859 /* Someday, we should do better than this, by only blowing away
2860 the things that really need to be blown. */
2862 /* Clear the "current" symtab first, because it is no longer valid.
2863 breakpoint_re_set may try to access the current symtab. */
2864 clear_current_source_symtab_and_line ();
2867 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2868 breakpoint_re_set ();
2869 clear_last_displayed_sal ();
2870 clear_pc_function_cache ();
2871 observer_notify_new_objfile (NULL
);
2873 /* Clear globals which might have pointed into a removed objfile.
2874 FIXME: It's not clear which of these are supposed to persist
2875 between expressions and which ought to be reset each time. */
2876 expression_context_block
= NULL
;
2877 innermost_block
= NULL
;
2879 /* Varobj may refer to old symbols, perform a cleanup. */
2880 varobj_invalidate ();
2885 clear_symtab_users_cleanup (void *ignore
)
2887 clear_symtab_users (0);
2891 The following code implements an abstraction for debugging overlay sections.
2893 The target model is as follows:
2894 1) The gnu linker will permit multiple sections to be mapped into the
2895 same VMA, each with its own unique LMA (or load address).
2896 2) It is assumed that some runtime mechanism exists for mapping the
2897 sections, one by one, from the load address into the VMA address.
2898 3) This code provides a mechanism for gdb to keep track of which
2899 sections should be considered to be mapped from the VMA to the LMA.
2900 This information is used for symbol lookup, and memory read/write.
2901 For instance, if a section has been mapped then its contents
2902 should be read from the VMA, otherwise from the LMA.
2904 Two levels of debugger support for overlays are available. One is
2905 "manual", in which the debugger relies on the user to tell it which
2906 overlays are currently mapped. This level of support is
2907 implemented entirely in the core debugger, and the information about
2908 whether a section is mapped is kept in the objfile->obj_section table.
2910 The second level of support is "automatic", and is only available if
2911 the target-specific code provides functionality to read the target's
2912 overlay mapping table, and translate its contents for the debugger
2913 (by updating the mapped state information in the obj_section tables).
2915 The interface is as follows:
2917 overlay map <name> -- tell gdb to consider this section mapped
2918 overlay unmap <name> -- tell gdb to consider this section unmapped
2919 overlay list -- list the sections that GDB thinks are mapped
2920 overlay read-target -- get the target's state of what's mapped
2921 overlay off/manual/auto -- set overlay debugging state
2922 Functional interface:
2923 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2924 section, return that section.
2925 find_pc_overlay(pc): find any overlay section that contains
2926 the pc, either in its VMA or its LMA
2927 section_is_mapped(sect): true if overlay is marked as mapped
2928 section_is_overlay(sect): true if section's VMA != LMA
2929 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2930 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2931 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2932 overlay_mapped_address(...): map an address from section's LMA to VMA
2933 overlay_unmapped_address(...): map an address from section's VMA to LMA
2934 symbol_overlayed_address(...): Return a "current" address for symbol:
2935 either in VMA or LMA depending on whether
2936 the symbol's section is currently mapped. */
2938 /* Overlay debugging state: */
2940 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2941 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2943 /* Function: section_is_overlay (SECTION)
2944 Returns true if SECTION has VMA not equal to LMA, ie.
2945 SECTION is loaded at an address different from where it will "run". */
2948 section_is_overlay (struct obj_section
*section
)
2950 if (overlay_debugging
&& section
)
2952 bfd
*abfd
= section
->objfile
->obfd
;
2953 asection
*bfd_section
= section
->the_bfd_section
;
2955 if (bfd_section_lma (abfd
, bfd_section
) != 0
2956 && bfd_section_lma (abfd
, bfd_section
)
2957 != bfd_section_vma (abfd
, bfd_section
))
2964 /* Function: overlay_invalidate_all (void)
2965 Invalidate the mapped state of all overlay sections (mark it as stale). */
2968 overlay_invalidate_all (void)
2970 struct objfile
*objfile
;
2971 struct obj_section
*sect
;
2973 ALL_OBJSECTIONS (objfile
, sect
)
2974 if (section_is_overlay (sect
))
2975 sect
->ovly_mapped
= -1;
2978 /* Function: section_is_mapped (SECTION)
2979 Returns true if section is an overlay, and is currently mapped.
2981 Access to the ovly_mapped flag is restricted to this function, so
2982 that we can do automatic update. If the global flag
2983 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2984 overlay_invalidate_all. If the mapped state of the particular
2985 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2988 section_is_mapped (struct obj_section
*osect
)
2990 struct gdbarch
*gdbarch
;
2992 if (osect
== 0 || !section_is_overlay (osect
))
2995 switch (overlay_debugging
)
2999 return 0; /* overlay debugging off */
3000 case ovly_auto
: /* overlay debugging automatic */
3001 /* Unles there is a gdbarch_overlay_update function,
3002 there's really nothing useful to do here (can't really go auto). */
3003 gdbarch
= get_objfile_arch (osect
->objfile
);
3004 if (gdbarch_overlay_update_p (gdbarch
))
3006 if (overlay_cache_invalid
)
3008 overlay_invalidate_all ();
3009 overlay_cache_invalid
= 0;
3011 if (osect
->ovly_mapped
== -1)
3012 gdbarch_overlay_update (gdbarch
, osect
);
3014 /* fall thru to manual case */
3015 case ovly_on
: /* overlay debugging manual */
3016 return osect
->ovly_mapped
== 1;
3020 /* Function: pc_in_unmapped_range
3021 If PC falls into the lma range of SECTION, return true, else false. */
3024 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3026 if (section_is_overlay (section
))
3028 bfd
*abfd
= section
->objfile
->obfd
;
3029 asection
*bfd_section
= section
->the_bfd_section
;
3031 /* We assume the LMA is relocated by the same offset as the VMA. */
3032 bfd_vma size
= bfd_get_section_size (bfd_section
);
3033 CORE_ADDR offset
= obj_section_offset (section
);
3035 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3036 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3043 /* Function: pc_in_mapped_range
3044 If PC falls into the vma range of SECTION, return true, else false. */
3047 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3049 if (section_is_overlay (section
))
3051 if (obj_section_addr (section
) <= pc
3052 && pc
< obj_section_endaddr (section
))
3060 /* Return true if the mapped ranges of sections A and B overlap, false
3063 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3065 CORE_ADDR a_start
= obj_section_addr (a
);
3066 CORE_ADDR a_end
= obj_section_endaddr (a
);
3067 CORE_ADDR b_start
= obj_section_addr (b
);
3068 CORE_ADDR b_end
= obj_section_endaddr (b
);
3070 return (a_start
< b_end
&& b_start
< a_end
);
3073 /* Function: overlay_unmapped_address (PC, SECTION)
3074 Returns the address corresponding to PC in the unmapped (load) range.
3075 May be the same as PC. */
3078 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3080 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3082 bfd
*abfd
= section
->objfile
->obfd
;
3083 asection
*bfd_section
= section
->the_bfd_section
;
3085 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3086 - bfd_section_vma (abfd
, bfd_section
);
3092 /* Function: overlay_mapped_address (PC, SECTION)
3093 Returns the address corresponding to PC in the mapped (runtime) range.
3094 May be the same as PC. */
3097 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3099 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3101 bfd
*abfd
= section
->objfile
->obfd
;
3102 asection
*bfd_section
= section
->the_bfd_section
;
3104 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3105 - bfd_section_lma (abfd
, bfd_section
);
3112 /* Function: symbol_overlayed_address
3113 Return one of two addresses (relative to the VMA or to the LMA),
3114 depending on whether the section is mapped or not. */
3117 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3119 if (overlay_debugging
)
3121 /* If the symbol has no section, just return its regular address. */
3124 /* If the symbol's section is not an overlay, just return its
3126 if (!section_is_overlay (section
))
3128 /* If the symbol's section is mapped, just return its address. */
3129 if (section_is_mapped (section
))
3132 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3133 * then return its LOADED address rather than its vma address!!
3135 return overlay_unmapped_address (address
, section
);
3140 /* Function: find_pc_overlay (PC)
3141 Return the best-match overlay section for PC:
3142 If PC matches a mapped overlay section's VMA, return that section.
3143 Else if PC matches an unmapped section's VMA, return that section.
3144 Else if PC matches an unmapped section's LMA, return that section. */
3146 struct obj_section
*
3147 find_pc_overlay (CORE_ADDR pc
)
3149 struct objfile
*objfile
;
3150 struct obj_section
*osect
, *best_match
= NULL
;
3152 if (overlay_debugging
)
3153 ALL_OBJSECTIONS (objfile
, osect
)
3154 if (section_is_overlay (osect
))
3156 if (pc_in_mapped_range (pc
, osect
))
3158 if (section_is_mapped (osect
))
3163 else if (pc_in_unmapped_range (pc
, osect
))
3169 /* Function: find_pc_mapped_section (PC)
3170 If PC falls into the VMA address range of an overlay section that is
3171 currently marked as MAPPED, return that section. Else return NULL. */
3173 struct obj_section
*
3174 find_pc_mapped_section (CORE_ADDR pc
)
3176 struct objfile
*objfile
;
3177 struct obj_section
*osect
;
3179 if (overlay_debugging
)
3180 ALL_OBJSECTIONS (objfile
, osect
)
3181 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3187 /* Function: list_overlays_command
3188 Print a list of mapped sections and their PC ranges. */
3191 list_overlays_command (char *args
, int from_tty
)
3194 struct objfile
*objfile
;
3195 struct obj_section
*osect
;
3197 if (overlay_debugging
)
3198 ALL_OBJSECTIONS (objfile
, osect
)
3199 if (section_is_mapped (osect
))
3201 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3206 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3207 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3208 size
= bfd_get_section_size (osect
->the_bfd_section
);
3209 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3211 printf_filtered ("Section %s, loaded at ", name
);
3212 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3213 puts_filtered (" - ");
3214 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3215 printf_filtered (", mapped at ");
3216 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3217 puts_filtered (" - ");
3218 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3219 puts_filtered ("\n");
3224 printf_filtered (_("No sections are mapped.\n"));
3227 /* Function: map_overlay_command
3228 Mark the named section as mapped (ie. residing at its VMA address). */
3231 map_overlay_command (char *args
, int from_tty
)
3233 struct objfile
*objfile
, *objfile2
;
3234 struct obj_section
*sec
, *sec2
;
3236 if (!overlay_debugging
)
3237 error (_("Overlay debugging not enabled. Use "
3238 "either the 'overlay auto' or\n"
3239 "the 'overlay manual' command."));
3241 if (args
== 0 || *args
== 0)
3242 error (_("Argument required: name of an overlay section"));
3244 /* First, find a section matching the user supplied argument. */
3245 ALL_OBJSECTIONS (objfile
, sec
)
3246 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3248 /* Now, check to see if the section is an overlay. */
3249 if (!section_is_overlay (sec
))
3250 continue; /* not an overlay section */
3252 /* Mark the overlay as "mapped". */
3253 sec
->ovly_mapped
= 1;
3255 /* Next, make a pass and unmap any sections that are
3256 overlapped by this new section: */
3257 ALL_OBJSECTIONS (objfile2
, sec2
)
3258 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3261 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3262 bfd_section_name (objfile
->obfd
,
3263 sec2
->the_bfd_section
));
3264 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3268 error (_("No overlay section called %s"), args
);
3271 /* Function: unmap_overlay_command
3272 Mark the overlay section as unmapped
3273 (ie. resident in its LMA address range, rather than the VMA range). */
3276 unmap_overlay_command (char *args
, int from_tty
)
3278 struct objfile
*objfile
;
3279 struct obj_section
*sec
;
3281 if (!overlay_debugging
)
3282 error (_("Overlay debugging not enabled. "
3283 "Use either the 'overlay auto' or\n"
3284 "the 'overlay manual' command."));
3286 if (args
== 0 || *args
== 0)
3287 error (_("Argument required: name of an overlay section"));
3289 /* First, find a section matching the user supplied argument. */
3290 ALL_OBJSECTIONS (objfile
, sec
)
3291 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3293 if (!sec
->ovly_mapped
)
3294 error (_("Section %s is not mapped"), args
);
3295 sec
->ovly_mapped
= 0;
3298 error (_("No overlay section called %s"), args
);
3301 /* Function: overlay_auto_command
3302 A utility command to turn on overlay debugging.
3303 Possibly this should be done via a set/show command. */
3306 overlay_auto_command (char *args
, int from_tty
)
3308 overlay_debugging
= ovly_auto
;
3309 enable_overlay_breakpoints ();
3311 printf_unfiltered (_("Automatic overlay debugging enabled."));
3314 /* Function: overlay_manual_command
3315 A utility command to turn on overlay debugging.
3316 Possibly this should be done via a set/show command. */
3319 overlay_manual_command (char *args
, int from_tty
)
3321 overlay_debugging
= ovly_on
;
3322 disable_overlay_breakpoints ();
3324 printf_unfiltered (_("Overlay debugging enabled."));
3327 /* Function: overlay_off_command
3328 A utility command to turn on overlay debugging.
3329 Possibly this should be done via a set/show command. */
3332 overlay_off_command (char *args
, int from_tty
)
3334 overlay_debugging
= ovly_off
;
3335 disable_overlay_breakpoints ();
3337 printf_unfiltered (_("Overlay debugging disabled."));
3341 overlay_load_command (char *args
, int from_tty
)
3343 struct gdbarch
*gdbarch
= get_current_arch ();
3345 if (gdbarch_overlay_update_p (gdbarch
))
3346 gdbarch_overlay_update (gdbarch
, NULL
);
3348 error (_("This target does not know how to read its overlay state."));
3351 /* Function: overlay_command
3352 A place-holder for a mis-typed command. */
3354 /* Command list chain containing all defined "overlay" subcommands. */
3355 static struct cmd_list_element
*overlaylist
;
3358 overlay_command (char *args
, int from_tty
)
3361 ("\"overlay\" must be followed by the name of an overlay command.\n");
3362 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3366 /* Target Overlays for the "Simplest" overlay manager:
3368 This is GDB's default target overlay layer. It works with the
3369 minimal overlay manager supplied as an example by Cygnus. The
3370 entry point is via a function pointer "gdbarch_overlay_update",
3371 so targets that use a different runtime overlay manager can
3372 substitute their own overlay_update function and take over the
3375 The overlay_update function pokes around in the target's data structures
3376 to see what overlays are mapped, and updates GDB's overlay mapping with
3379 In this simple implementation, the target data structures are as follows:
3380 unsigned _novlys; /# number of overlay sections #/
3381 unsigned _ovly_table[_novlys][4] = {
3382 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3383 {..., ..., ..., ...},
3385 unsigned _novly_regions; /# number of overlay regions #/
3386 unsigned _ovly_region_table[_novly_regions][3] = {
3387 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3390 These functions will attempt to update GDB's mappedness state in the
3391 symbol section table, based on the target's mappedness state.
3393 To do this, we keep a cached copy of the target's _ovly_table, and
3394 attempt to detect when the cached copy is invalidated. The main
3395 entry point is "simple_overlay_update(SECT), which looks up SECT in
3396 the cached table and re-reads only the entry for that section from
3397 the target (whenever possible). */
3399 /* Cached, dynamically allocated copies of the target data structures: */
3400 static unsigned (*cache_ovly_table
)[4] = 0;
3401 static unsigned cache_novlys
= 0;
3402 static CORE_ADDR cache_ovly_table_base
= 0;
3405 VMA
, SIZE
, LMA
, MAPPED
3408 /* Throw away the cached copy of _ovly_table. */
3410 simple_free_overlay_table (void)
3412 if (cache_ovly_table
)
3413 xfree (cache_ovly_table
);
3415 cache_ovly_table
= NULL
;
3416 cache_ovly_table_base
= 0;
3419 /* Read an array of ints of size SIZE from the target into a local buffer.
3420 Convert to host order. int LEN is number of ints. */
3422 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3423 int len
, int size
, enum bfd_endian byte_order
)
3425 /* FIXME (alloca): Not safe if array is very large. */
3426 gdb_byte
*buf
= alloca (len
* size
);
3429 read_memory (memaddr
, buf
, len
* size
);
3430 for (i
= 0; i
< len
; i
++)
3431 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3434 /* Find and grab a copy of the target _ovly_table
3435 (and _novlys, which is needed for the table's size). */
3437 simple_read_overlay_table (void)
3439 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3440 struct gdbarch
*gdbarch
;
3442 enum bfd_endian byte_order
;
3444 simple_free_overlay_table ();
3445 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3448 error (_("Error reading inferior's overlay table: "
3449 "couldn't find `_novlys' variable\n"
3450 "in inferior. Use `overlay manual' mode."));
3454 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3455 if (! ovly_table_msym
)
3457 error (_("Error reading inferior's overlay table: couldn't find "
3458 "`_ovly_table' array\n"
3459 "in inferior. Use `overlay manual' mode."));
3463 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3464 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3465 byte_order
= gdbarch_byte_order (gdbarch
);
3467 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3470 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3471 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3472 read_target_long_array (cache_ovly_table_base
,
3473 (unsigned int *) cache_ovly_table
,
3474 cache_novlys
* 4, word_size
, byte_order
);
3476 return 1; /* SUCCESS */
3479 /* Function: simple_overlay_update_1
3480 A helper function for simple_overlay_update. Assuming a cached copy
3481 of _ovly_table exists, look through it to find an entry whose vma,
3482 lma and size match those of OSECT. Re-read the entry and make sure
3483 it still matches OSECT (else the table may no longer be valid).
3484 Set OSECT's mapped state to match the entry. Return: 1 for
3485 success, 0 for failure. */
3488 simple_overlay_update_1 (struct obj_section
*osect
)
3491 bfd
*obfd
= osect
->objfile
->obfd
;
3492 asection
*bsect
= osect
->the_bfd_section
;
3493 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3494 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3495 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3497 size
= bfd_get_section_size (osect
->the_bfd_section
);
3498 for (i
= 0; i
< cache_novlys
; i
++)
3499 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3500 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3501 /* && cache_ovly_table[i][SIZE] == size */ )
3503 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3504 (unsigned int *) cache_ovly_table
[i
],
3505 4, word_size
, byte_order
);
3506 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3507 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3508 /* && cache_ovly_table[i][SIZE] == size */ )
3510 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3513 else /* Warning! Warning! Target's ovly table has changed! */
3519 /* Function: simple_overlay_update
3520 If OSECT is NULL, then update all sections' mapped state
3521 (after re-reading the entire target _ovly_table).
3522 If OSECT is non-NULL, then try to find a matching entry in the
3523 cached ovly_table and update only OSECT's mapped state.
3524 If a cached entry can't be found or the cache isn't valid, then
3525 re-read the entire cache, and go ahead and update all sections. */
3528 simple_overlay_update (struct obj_section
*osect
)
3530 struct objfile
*objfile
;
3532 /* Were we given an osect to look up? NULL means do all of them. */
3534 /* Have we got a cached copy of the target's overlay table? */
3535 if (cache_ovly_table
!= NULL
)
3537 /* Does its cached location match what's currently in the
3539 struct minimal_symbol
*minsym
3540 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3543 error (_("Error reading inferior's overlay table: couldn't "
3544 "find `_ovly_table' array\n"
3545 "in inferior. Use `overlay manual' mode."));
3547 if (cache_ovly_table_base
== SYMBOL_VALUE_ADDRESS (minsym
))
3548 /* Then go ahead and try to look up this single section in
3550 if (simple_overlay_update_1 (osect
))
3551 /* Found it! We're done. */
3555 /* Cached table no good: need to read the entire table anew.
3556 Or else we want all the sections, in which case it's actually
3557 more efficient to read the whole table in one block anyway. */
3559 if (! simple_read_overlay_table ())
3562 /* Now may as well update all sections, even if only one was requested. */
3563 ALL_OBJSECTIONS (objfile
, osect
)
3564 if (section_is_overlay (osect
))
3567 bfd
*obfd
= osect
->objfile
->obfd
;
3568 asection
*bsect
= osect
->the_bfd_section
;
3570 size
= bfd_get_section_size (bsect
);
3571 for (i
= 0; i
< cache_novlys
; i
++)
3572 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3573 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3574 /* && cache_ovly_table[i][SIZE] == size */ )
3575 { /* obj_section matches i'th entry in ovly_table. */
3576 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3577 break; /* finished with inner for loop: break out. */
3582 /* Set the output sections and output offsets for section SECTP in
3583 ABFD. The relocation code in BFD will read these offsets, so we
3584 need to be sure they're initialized. We map each section to itself,
3585 with no offset; this means that SECTP->vma will be honored. */
3588 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3590 sectp
->output_section
= sectp
;
3591 sectp
->output_offset
= 0;
3594 /* Default implementation for sym_relocate. */
3598 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3601 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3603 bfd
*abfd
= sectp
->owner
;
3605 /* We're only interested in sections with relocation
3607 if ((sectp
->flags
& SEC_RELOC
) == 0)
3610 /* We will handle section offsets properly elsewhere, so relocate as if
3611 all sections begin at 0. */
3612 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3614 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3617 /* Relocate the contents of a debug section SECTP in ABFD. The
3618 contents are stored in BUF if it is non-NULL, or returned in a
3619 malloc'd buffer otherwise.
3621 For some platforms and debug info formats, shared libraries contain
3622 relocations against the debug sections (particularly for DWARF-2;
3623 one affected platform is PowerPC GNU/Linux, although it depends on
3624 the version of the linker in use). Also, ELF object files naturally
3625 have unresolved relocations for their debug sections. We need to apply
3626 the relocations in order to get the locations of symbols correct.
3627 Another example that may require relocation processing, is the
3628 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3632 symfile_relocate_debug_section (struct objfile
*objfile
,
3633 asection
*sectp
, bfd_byte
*buf
)
3635 gdb_assert (objfile
->sf
->sym_relocate
);
3637 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3640 struct symfile_segment_data
*
3641 get_symfile_segment_data (bfd
*abfd
)
3643 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3648 return sf
->sym_segments (abfd
);
3652 free_symfile_segment_data (struct symfile_segment_data
*data
)
3654 xfree (data
->segment_bases
);
3655 xfree (data
->segment_sizes
);
3656 xfree (data
->segment_info
);
3662 - DATA, containing segment addresses from the object file ABFD, and
3663 the mapping from ABFD's sections onto the segments that own them,
3665 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3666 segment addresses reported by the target,
3667 store the appropriate offsets for each section in OFFSETS.
3669 If there are fewer entries in SEGMENT_BASES than there are segments
3670 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3672 If there are more entries, then ignore the extra. The target may
3673 not be able to distinguish between an empty data segment and a
3674 missing data segment; a missing text segment is less plausible. */
3676 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3677 struct section_offsets
*offsets
,
3678 int num_segment_bases
,
3679 const CORE_ADDR
*segment_bases
)
3684 /* It doesn't make sense to call this function unless you have some
3685 segment base addresses. */
3686 gdb_assert (num_segment_bases
> 0);
3688 /* If we do not have segment mappings for the object file, we
3689 can not relocate it by segments. */
3690 gdb_assert (data
!= NULL
);
3691 gdb_assert (data
->num_segments
> 0);
3693 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3695 int which
= data
->segment_info
[i
];
3697 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3699 /* Don't bother computing offsets for sections that aren't
3700 loaded as part of any segment. */
3704 /* Use the last SEGMENT_BASES entry as the address of any extra
3705 segments mentioned in DATA->segment_info. */
3706 if (which
> num_segment_bases
)
3707 which
= num_segment_bases
;
3709 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3710 - data
->segment_bases
[which
- 1]);
3717 symfile_find_segment_sections (struct objfile
*objfile
)
3719 bfd
*abfd
= objfile
->obfd
;
3722 struct symfile_segment_data
*data
;
3724 data
= get_symfile_segment_data (objfile
->obfd
);
3728 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3730 free_symfile_segment_data (data
);
3734 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3736 int which
= data
->segment_info
[i
];
3740 if (objfile
->sect_index_text
== -1)
3741 objfile
->sect_index_text
= sect
->index
;
3743 if (objfile
->sect_index_rodata
== -1)
3744 objfile
->sect_index_rodata
= sect
->index
;
3746 else if (which
== 2)
3748 if (objfile
->sect_index_data
== -1)
3749 objfile
->sect_index_data
= sect
->index
;
3751 if (objfile
->sect_index_bss
== -1)
3752 objfile
->sect_index_bss
= sect
->index
;
3756 free_symfile_segment_data (data
);
3760 _initialize_symfile (void)
3762 struct cmd_list_element
*c
;
3764 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3765 Load symbol table from executable file FILE.\n\
3766 The `file' command can also load symbol tables, as well as setting the file\n\
3767 to execute."), &cmdlist
);
3768 set_cmd_completer (c
, filename_completer
);
3770 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3771 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3772 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3773 ...]\nADDR is the starting address of the file's text.\n\
3774 The optional arguments are section-name section-address pairs and\n\
3775 should be specified if the data and bss segments are not contiguous\n\
3776 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3778 set_cmd_completer (c
, filename_completer
);
3780 c
= add_cmd ("load", class_files
, load_command
, _("\
3781 Dynamically load FILE into the running program, and record its symbols\n\
3782 for access from GDB.\n\
3783 A load OFFSET may also be given."), &cmdlist
);
3784 set_cmd_completer (c
, filename_completer
);
3786 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3787 _("Commands for debugging overlays."), &overlaylist
,
3788 "overlay ", 0, &cmdlist
);
3790 add_com_alias ("ovly", "overlay", class_alias
, 1);
3791 add_com_alias ("ov", "overlay", class_alias
, 1);
3793 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3794 _("Assert that an overlay section is mapped."), &overlaylist
);
3796 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3797 _("Assert that an overlay section is unmapped."), &overlaylist
);
3799 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3800 _("List mappings of overlay sections."), &overlaylist
);
3802 add_cmd ("manual", class_support
, overlay_manual_command
,
3803 _("Enable overlay debugging."), &overlaylist
);
3804 add_cmd ("off", class_support
, overlay_off_command
,
3805 _("Disable overlay debugging."), &overlaylist
);
3806 add_cmd ("auto", class_support
, overlay_auto_command
,
3807 _("Enable automatic overlay debugging."), &overlaylist
);
3808 add_cmd ("load-target", class_support
, overlay_load_command
,
3809 _("Read the overlay mapping state from the target."), &overlaylist
);
3811 /* Filename extension to source language lookup table: */
3812 init_filename_language_table ();
3813 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3815 Set mapping between filename extension and source language."), _("\
3816 Show mapping between filename extension and source language."), _("\
3817 Usage: set extension-language .foo bar"),
3818 set_ext_lang_command
,
3820 &setlist
, &showlist
);
3822 add_info ("extensions", info_ext_lang_command
,
3823 _("All filename extensions associated with a source language."));
3825 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3826 &debug_file_directory
, _("\
3827 Set the directories where separate debug symbols are searched for."), _("\
3828 Show the directories where separate debug symbols are searched for."), _("\
3829 Separate debug symbols are first searched for in the same\n\
3830 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3831 and lastly at the path of the directory of the binary with\n\
3832 each global debug-file-directory component prepended."),
3834 show_debug_file_directory
,
3835 &setlist
, &showlist
);