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 (const char *args
, int from_tty
, int flags
);
92 static void add_symbol_file_command (char *, int);
94 static const struct sym_fns
*find_sym_fns (bfd
*);
96 static void decrement_reading_symtab (void *);
98 static void overlay_invalidate_all (void);
100 static void overlay_auto_command (char *, int);
102 static void overlay_manual_command (char *, int);
104 static void overlay_off_command (char *, int);
106 static void overlay_load_command (char *, int);
108 static void overlay_command (char *, int);
110 static void simple_free_overlay_table (void);
112 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
115 static int simple_read_overlay_table (void);
117 static int simple_overlay_update_1 (struct obj_section
*);
119 static void add_filename_language (char *ext
, enum language lang
);
121 static void info_ext_lang_command (char *args
, int from_tty
);
123 static void init_filename_language_table (void);
125 static void symfile_find_segment_sections (struct objfile
*objfile
);
127 void _initialize_symfile (void);
129 /* List of all available sym_fns. On gdb startup, each object file reader
130 calls add_symtab_fns() to register information on each format it is
135 /* BFD flavour that we handle. */
136 enum bfd_flavour sym_flavour
;
138 /* The "vtable" of symbol functions. */
139 const struct sym_fns
*sym_fns
;
140 } registered_sym_fns
;
142 DEF_VEC_O (registered_sym_fns
);
144 static VEC (registered_sym_fns
) *symtab_fns
= NULL
;
146 /* If non-zero, shared library symbols will be added automatically
147 when the inferior is created, new libraries are loaded, or when
148 attaching to the inferior. This is almost always what users will
149 want to have happen; but for very large programs, the startup time
150 will be excessive, and so if this is a problem, the user can clear
151 this flag and then add the shared library symbols as needed. Note
152 that there is a potential for confusion, since if the shared
153 library symbols are not loaded, commands like "info fun" will *not*
154 report all the functions that are actually present. */
156 int auto_solib_add
= 1;
159 /* True if we are reading a symbol table. */
161 int currently_reading_symtab
= 0;
164 decrement_reading_symtab (void *dummy
)
166 currently_reading_symtab
--;
167 gdb_assert (currently_reading_symtab
>= 0);
170 /* Increment currently_reading_symtab and return a cleanup that can be
171 used to decrement it. */
174 increment_reading_symtab (void)
176 ++currently_reading_symtab
;
177 gdb_assert (currently_reading_symtab
> 0);
178 return make_cleanup (decrement_reading_symtab
, NULL
);
181 /* Remember the lowest-addressed loadable section we've seen.
182 This function is called via bfd_map_over_sections.
184 In case of equal vmas, the section with the largest size becomes the
185 lowest-addressed loadable section.
187 If the vmas and sizes are equal, the last section is considered the
188 lowest-addressed loadable section. */
191 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
193 asection
**lowest
= (asection
**) obj
;
195 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
198 *lowest
= sect
; /* First loadable section */
199 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
200 *lowest
= sect
; /* A lower loadable section */
201 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
202 && (bfd_section_size (abfd
, (*lowest
))
203 <= bfd_section_size (abfd
, sect
)))
207 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
208 new object's 'num_sections' field is set to 0; it must be updated
211 struct section_addr_info
*
212 alloc_section_addr_info (size_t num_sections
)
214 struct section_addr_info
*sap
;
217 size
= (sizeof (struct section_addr_info
)
218 + sizeof (struct other_sections
) * (num_sections
- 1));
219 sap
= (struct section_addr_info
*) xmalloc (size
);
220 memset (sap
, 0, size
);
225 /* Build (allocate and populate) a section_addr_info struct from
226 an existing section table. */
228 extern struct section_addr_info
*
229 build_section_addr_info_from_section_table (const struct target_section
*start
,
230 const struct target_section
*end
)
232 struct section_addr_info
*sap
;
233 const struct target_section
*stp
;
236 sap
= alloc_section_addr_info (end
- start
);
238 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
240 struct bfd_section
*asect
= stp
->the_bfd_section
;
241 bfd
*abfd
= asect
->owner
;
243 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
244 && oidx
< end
- start
)
246 sap
->other
[oidx
].addr
= stp
->addr
;
247 sap
->other
[oidx
].name
= xstrdup (bfd_section_name (abfd
, asect
));
248 sap
->other
[oidx
].sectindex
= gdb_bfd_section_index (abfd
, asect
);
253 sap
->num_sections
= oidx
;
258 /* Create a section_addr_info from section offsets in ABFD. */
260 static struct section_addr_info
*
261 build_section_addr_info_from_bfd (bfd
*abfd
)
263 struct section_addr_info
*sap
;
265 struct bfd_section
*sec
;
267 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
268 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
269 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
271 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
272 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
273 sap
->other
[i
].sectindex
= gdb_bfd_section_index (abfd
, sec
);
277 sap
->num_sections
= i
;
282 /* Create a section_addr_info from section offsets in OBJFILE. */
284 struct section_addr_info
*
285 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
287 struct section_addr_info
*sap
;
290 /* Before reread_symbols gets rewritten it is not safe to call:
291 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
293 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
294 for (i
= 0; i
< sap
->num_sections
; i
++)
296 int sectindex
= sap
->other
[i
].sectindex
;
298 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
303 /* Free all memory allocated by build_section_addr_info_from_section_table. */
306 free_section_addr_info (struct section_addr_info
*sap
)
310 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
311 xfree (sap
->other
[idx
].name
);
315 /* Initialize OBJFILE's sect_index_* members. */
318 init_objfile_sect_indices (struct objfile
*objfile
)
323 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
325 objfile
->sect_index_text
= sect
->index
;
327 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
329 objfile
->sect_index_data
= sect
->index
;
331 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
333 objfile
->sect_index_bss
= sect
->index
;
335 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
337 objfile
->sect_index_rodata
= sect
->index
;
339 /* This is where things get really weird... We MUST have valid
340 indices for the various sect_index_* members or gdb will abort.
341 So if for example, there is no ".text" section, we have to
342 accomodate that. First, check for a file with the standard
343 one or two segments. */
345 symfile_find_segment_sections (objfile
);
347 /* Except when explicitly adding symbol files at some address,
348 section_offsets contains nothing but zeros, so it doesn't matter
349 which slot in section_offsets the individual sect_index_* members
350 index into. So if they are all zero, it is safe to just point
351 all the currently uninitialized indices to the first slot. But
352 beware: if this is the main executable, it may be relocated
353 later, e.g. by the remote qOffsets packet, and then this will
354 be wrong! That's why we try segments first. */
356 for (i
= 0; i
< objfile
->num_sections
; i
++)
358 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
363 if (i
== objfile
->num_sections
)
365 if (objfile
->sect_index_text
== -1)
366 objfile
->sect_index_text
= 0;
367 if (objfile
->sect_index_data
== -1)
368 objfile
->sect_index_data
= 0;
369 if (objfile
->sect_index_bss
== -1)
370 objfile
->sect_index_bss
= 0;
371 if (objfile
->sect_index_rodata
== -1)
372 objfile
->sect_index_rodata
= 0;
376 /* The arguments to place_section. */
378 struct place_section_arg
380 struct section_offsets
*offsets
;
384 /* Find a unique offset to use for loadable section SECT if
385 the user did not provide an offset. */
388 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
390 struct place_section_arg
*arg
= obj
;
391 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
393 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
395 /* We are only interested in allocated sections. */
396 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
399 /* If the user specified an offset, honor it. */
400 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
403 /* Otherwise, let's try to find a place for the section. */
404 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
411 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
413 int indx
= cur_sec
->index
;
415 /* We don't need to compare against ourself. */
419 /* We can only conflict with allocated sections. */
420 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
423 /* If the section offset is 0, either the section has not been placed
424 yet, or it was the lowest section placed (in which case LOWEST
425 will be past its end). */
426 if (offsets
[indx
] == 0)
429 /* If this section would overlap us, then we must move up. */
430 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
431 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
433 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
434 start_addr
= (start_addr
+ align
- 1) & -align
;
439 /* Otherwise, we appear to be OK. So far. */
444 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
445 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
448 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
449 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
453 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
455 const struct section_addr_info
*addrs
)
459 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
461 /* Now calculate offsets for section that were specified by the caller. */
462 for (i
= 0; i
< addrs
->num_sections
; i
++)
464 const struct other_sections
*osp
;
466 osp
= &addrs
->other
[i
];
467 if (osp
->sectindex
== -1)
470 /* Record all sections in offsets. */
471 /* The section_offsets in the objfile are here filled in using
473 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
477 /* Transform section name S for a name comparison. prelink can split section
478 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
479 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
480 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
481 (`.sbss') section has invalid (increased) virtual address. */
484 addr_section_name (const char *s
)
486 if (strcmp (s
, ".dynbss") == 0)
488 if (strcmp (s
, ".sdynbss") == 0)
494 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
495 their (name, sectindex) pair. sectindex makes the sort by name stable. */
498 addrs_section_compar (const void *ap
, const void *bp
)
500 const struct other_sections
*a
= *((struct other_sections
**) ap
);
501 const struct other_sections
*b
= *((struct other_sections
**) bp
);
504 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
508 return a
->sectindex
- b
->sectindex
;
511 /* Provide sorted array of pointers to sections of ADDRS. The array is
512 terminated by NULL. Caller is responsible to call xfree for it. */
514 static struct other_sections
**
515 addrs_section_sort (struct section_addr_info
*addrs
)
517 struct other_sections
**array
;
520 /* `+ 1' for the NULL terminator. */
521 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
522 for (i
= 0; i
< addrs
->num_sections
; i
++)
523 array
[i
] = &addrs
->other
[i
];
526 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
531 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
532 also SECTINDEXes specific to ABFD there. This function can be used to
533 rebase ADDRS to start referencing different BFD than before. */
536 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
538 asection
*lower_sect
;
539 CORE_ADDR lower_offset
;
541 struct cleanup
*my_cleanup
;
542 struct section_addr_info
*abfd_addrs
;
543 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
544 struct other_sections
**addrs_to_abfd_addrs
;
546 /* Find lowest loadable section to be used as starting point for
547 continguous sections. */
549 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
550 if (lower_sect
== NULL
)
552 warning (_("no loadable sections found in added symbol-file %s"),
553 bfd_get_filename (abfd
));
557 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
559 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
560 in ABFD. Section names are not unique - there can be multiple sections of
561 the same name. Also the sections of the same name do not have to be
562 adjacent to each other. Some sections may be present only in one of the
563 files. Even sections present in both files do not have to be in the same
566 Use stable sort by name for the sections in both files. Then linearly
567 scan both lists matching as most of the entries as possible. */
569 addrs_sorted
= addrs_section_sort (addrs
);
570 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
572 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
573 make_cleanup_free_section_addr_info (abfd_addrs
);
574 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
575 make_cleanup (xfree
, abfd_addrs_sorted
);
577 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
578 ABFD_ADDRS_SORTED. */
580 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
581 * addrs
->num_sections
);
582 make_cleanup (xfree
, addrs_to_abfd_addrs
);
584 while (*addrs_sorted
)
586 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
588 while (*abfd_addrs_sorted
589 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
593 if (*abfd_addrs_sorted
594 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
599 /* Make the found item directly addressable from ADDRS. */
600 index_in_addrs
= *addrs_sorted
- addrs
->other
;
601 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
602 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
604 /* Never use the same ABFD entry twice. */
611 /* Calculate offsets for the loadable sections.
612 FIXME! Sections must be in order of increasing loadable section
613 so that contiguous sections can use the lower-offset!!!
615 Adjust offsets if the segments are not contiguous.
616 If the section is contiguous, its offset should be set to
617 the offset of the highest loadable section lower than it
618 (the loadable section directly below it in memory).
619 this_offset = lower_offset = lower_addr - lower_orig_addr */
621 for (i
= 0; i
< addrs
->num_sections
; i
++)
623 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
627 /* This is the index used by BFD. */
628 addrs
->other
[i
].sectindex
= sect
->sectindex
;
630 if (addrs
->other
[i
].addr
!= 0)
632 addrs
->other
[i
].addr
-= sect
->addr
;
633 lower_offset
= addrs
->other
[i
].addr
;
636 addrs
->other
[i
].addr
= lower_offset
;
640 /* addr_section_name transformation is not used for SECT_NAME. */
641 const char *sect_name
= addrs
->other
[i
].name
;
643 /* This section does not exist in ABFD, which is normally
644 unexpected and we want to issue a warning.
646 However, the ELF prelinker does create a few sections which are
647 marked in the main executable as loadable (they are loaded in
648 memory from the DYNAMIC segment) and yet are not present in
649 separate debug info files. This is fine, and should not cause
650 a warning. Shared libraries contain just the section
651 ".gnu.liblist" but it is not marked as loadable there. There is
652 no other way to identify them than by their name as the sections
653 created by prelink have no special flags.
655 For the sections `.bss' and `.sbss' see addr_section_name. */
657 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
658 || strcmp (sect_name
, ".gnu.conflict") == 0
659 || (strcmp (sect_name
, ".bss") == 0
661 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
662 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
663 || (strcmp (sect_name
, ".sbss") == 0
665 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
666 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
667 warning (_("section %s not found in %s"), sect_name
,
668 bfd_get_filename (abfd
));
670 addrs
->other
[i
].addr
= 0;
671 addrs
->other
[i
].sectindex
= -1;
675 do_cleanups (my_cleanup
);
678 /* Parse the user's idea of an offset for dynamic linking, into our idea
679 of how to represent it for fast symbol reading. This is the default
680 version of the sym_fns.sym_offsets function for symbol readers that
681 don't need to do anything special. It allocates a section_offsets table
682 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
685 default_symfile_offsets (struct objfile
*objfile
,
686 const struct section_addr_info
*addrs
)
688 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
689 objfile
->section_offsets
= (struct section_offsets
*)
690 obstack_alloc (&objfile
->objfile_obstack
,
691 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
692 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
693 objfile
->num_sections
, addrs
);
695 /* For relocatable files, all loadable sections will start at zero.
696 The zero is meaningless, so try to pick arbitrary addresses such
697 that no loadable sections overlap. This algorithm is quadratic,
698 but the number of sections in a single object file is generally
700 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
702 struct place_section_arg arg
;
703 bfd
*abfd
= objfile
->obfd
;
706 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
707 /* We do not expect this to happen; just skip this step if the
708 relocatable file has a section with an assigned VMA. */
709 if (bfd_section_vma (abfd
, cur_sec
) != 0)
714 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
716 /* Pick non-overlapping offsets for sections the user did not
718 arg
.offsets
= objfile
->section_offsets
;
720 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
722 /* Correctly filling in the section offsets is not quite
723 enough. Relocatable files have two properties that
724 (most) shared objects do not:
726 - Their debug information will contain relocations. Some
727 shared libraries do also, but many do not, so this can not
730 - If there are multiple code sections they will be loaded
731 at different relative addresses in memory than they are
732 in the objfile, since all sections in the file will start
735 Because GDB has very limited ability to map from an
736 address in debug info to the correct code section,
737 it relies on adding SECT_OFF_TEXT to things which might be
738 code. If we clear all the section offsets, and set the
739 section VMAs instead, then symfile_relocate_debug_section
740 will return meaningful debug information pointing at the
743 GDB has too many different data structures for section
744 addresses - a bfd, objfile, and so_list all have section
745 tables, as does exec_ops. Some of these could probably
748 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
749 cur_sec
= cur_sec
->next
)
751 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
754 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
755 exec_set_section_address (bfd_get_filename (abfd
),
757 offsets
[cur_sec
->index
]);
758 offsets
[cur_sec
->index
] = 0;
763 /* Remember the bfd indexes for the .text, .data, .bss and
765 init_objfile_sect_indices (objfile
);
768 /* Divide the file into segments, which are individual relocatable units.
769 This is the default version of the sym_fns.sym_segments function for
770 symbol readers that do not have an explicit representation of segments.
771 It assumes that object files do not have segments, and fully linked
772 files have a single segment. */
774 struct symfile_segment_data
*
775 default_symfile_segments (bfd
*abfd
)
779 struct symfile_segment_data
*data
;
782 /* Relocatable files contain enough information to position each
783 loadable section independently; they should not be relocated
785 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
788 /* Make sure there is at least one loadable section in the file. */
789 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
791 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
799 low
= bfd_get_section_vma (abfd
, sect
);
800 high
= low
+ bfd_get_section_size (sect
);
802 data
= XZALLOC (struct symfile_segment_data
);
803 data
->num_segments
= 1;
804 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
805 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
807 num_sections
= bfd_count_sections (abfd
);
808 data
->segment_info
= XCALLOC (num_sections
, int);
810 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
814 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
817 vma
= bfd_get_section_vma (abfd
, sect
);
820 if (vma
+ bfd_get_section_size (sect
) > high
)
821 high
= vma
+ bfd_get_section_size (sect
);
823 data
->segment_info
[i
] = 1;
826 data
->segment_bases
[0] = low
;
827 data
->segment_sizes
[0] = high
- low
;
832 /* This is a convenience function to call sym_read for OBJFILE and
833 possibly force the partial symbols to be read. */
836 read_symbols (struct objfile
*objfile
, int add_flags
)
838 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
840 /* find_separate_debug_file_in_section should be called only if there is
841 single binary with no existing separate debug info file. */
842 if (!objfile_has_partial_symbols (objfile
)
843 && objfile
->separate_debug_objfile
== NULL
844 && objfile
->separate_debug_objfile_backlink
== NULL
)
846 bfd
*abfd
= find_separate_debug_file_in_section (objfile
);
847 struct cleanup
*cleanup
= make_cleanup_bfd_unref (abfd
);
851 /* find_separate_debug_file_in_section uses the same filename for the
852 virtual section-as-bfd like the bfd filename containing the
853 section. Therefore use also non-canonical name form for the same
854 file containing the section. */
855 symbol_file_add_separate (abfd
, objfile
->original_name
, add_flags
,
859 do_cleanups (cleanup
);
861 if ((add_flags
& SYMFILE_NO_READ
) == 0)
862 require_partial_symbols (objfile
, 0);
865 /* Initialize entry point information for this objfile. */
868 init_entry_point_info (struct objfile
*objfile
)
870 /* Save startup file's range of PC addresses to help blockframe.c
871 decide where the bottom of the stack is. */
873 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
875 /* Executable file -- record its entry point so we'll recognize
876 the startup file because it contains the entry point. */
877 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
878 objfile
->ei
.entry_point_p
= 1;
880 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
881 && bfd_get_start_address (objfile
->obfd
) != 0)
883 /* Some shared libraries may have entry points set and be
884 runnable. There's no clear way to indicate this, so just check
885 for values other than zero. */
886 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
887 objfile
->ei
.entry_point_p
= 1;
891 /* Examination of non-executable.o files. Short-circuit this stuff. */
892 objfile
->ei
.entry_point_p
= 0;
895 if (objfile
->ei
.entry_point_p
)
897 CORE_ADDR entry_point
= objfile
->ei
.entry_point
;
899 /* Make certain that the address points at real code, and not a
900 function descriptor. */
902 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
906 /* Remove any ISA markers, so that this matches entries in the
908 objfile
->ei
.entry_point
909 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
913 /* Process a symbol file, as either the main file or as a dynamically
916 This function does not set the OBJFILE's entry-point info.
918 OBJFILE is where the symbols are to be read from.
920 ADDRS is the list of section load addresses. If the user has given
921 an 'add-symbol-file' command, then this is the list of offsets and
922 addresses he or she provided as arguments to the command; or, if
923 we're handling a shared library, these are the actual addresses the
924 sections are loaded at, according to the inferior's dynamic linker
925 (as gleaned by GDB's shared library code). We convert each address
926 into an offset from the section VMA's as it appears in the object
927 file, and then call the file's sym_offsets function to convert this
928 into a format-specific offset table --- a `struct section_offsets'.
930 ADD_FLAGS encodes verbosity level, whether this is main symbol or
931 an extra symbol file such as dynamically loaded code, and wether
932 breakpoint reset should be deferred. */
935 syms_from_objfile_1 (struct objfile
*objfile
,
936 struct section_addr_info
*addrs
,
939 struct section_addr_info
*local_addr
= NULL
;
940 struct cleanup
*old_chain
;
941 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
943 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
945 if (objfile
->sf
== NULL
)
947 /* No symbols to load, but we still need to make sure
948 that the section_offsets table is allocated. */
949 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
950 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
952 objfile
->num_sections
= num_sections
;
953 objfile
->section_offsets
954 = obstack_alloc (&objfile
->objfile_obstack
, size
);
955 memset (objfile
->section_offsets
, 0, size
);
959 /* Make sure that partially constructed symbol tables will be cleaned up
960 if an error occurs during symbol reading. */
961 old_chain
= make_cleanup_free_objfile (objfile
);
963 /* If ADDRS is NULL, put together a dummy address list.
964 We now establish the convention that an addr of zero means
965 no load address was specified. */
968 local_addr
= alloc_section_addr_info (1);
969 make_cleanup (xfree
, local_addr
);
975 /* We will modify the main symbol table, make sure that all its users
976 will be cleaned up if an error occurs during symbol reading. */
977 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
979 /* Since no error yet, throw away the old symbol table. */
981 if (symfile_objfile
!= NULL
)
983 free_objfile (symfile_objfile
);
984 gdb_assert (symfile_objfile
== NULL
);
987 /* Currently we keep symbols from the add-symbol-file command.
988 If the user wants to get rid of them, they should do "symbol-file"
989 without arguments first. Not sure this is the best behavior
992 (*objfile
->sf
->sym_new_init
) (objfile
);
995 /* Convert addr into an offset rather than an absolute address.
996 We find the lowest address of a loaded segment in the objfile,
997 and assume that <addr> is where that got loaded.
999 We no longer warn if the lowest section is not a text segment (as
1000 happens for the PA64 port. */
1001 if (addrs
->num_sections
> 0)
1002 addr_info_make_relative (addrs
, objfile
->obfd
);
1004 /* Initialize symbol reading routines for this objfile, allow complaints to
1005 appear for this new file, and record how verbose to be, then do the
1006 initial symbol reading for this file. */
1008 (*objfile
->sf
->sym_init
) (objfile
);
1009 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1011 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1013 read_symbols (objfile
, add_flags
);
1015 /* Discard cleanups as symbol reading was successful. */
1017 discard_cleanups (old_chain
);
1021 /* Same as syms_from_objfile_1, but also initializes the objfile
1022 entry-point info. */
1025 syms_from_objfile (struct objfile
*objfile
,
1026 struct section_addr_info
*addrs
,
1029 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1030 init_entry_point_info (objfile
);
1033 /* Perform required actions after either reading in the initial
1034 symbols for a new objfile, or mapping in the symbols from a reusable
1035 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1038 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1040 /* If this is the main symbol file we have to clean up all users of the
1041 old main symbol file. Otherwise it is sufficient to fixup all the
1042 breakpoints that may have been redefined by this symbol file. */
1043 if (add_flags
& SYMFILE_MAINLINE
)
1045 /* OK, make it the "real" symbol file. */
1046 symfile_objfile
= objfile
;
1048 clear_symtab_users (add_flags
);
1050 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1052 breakpoint_re_set ();
1055 /* We're done reading the symbol file; finish off complaints. */
1056 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1059 /* Process a symbol file, as either the main file or as a dynamically
1062 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1063 A new reference is acquired by this function.
1065 For NAME description see allocate_objfile's definition.
1067 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1068 extra, such as dynamically loaded code, and what to do with breakpoins.
1070 ADDRS is as described for syms_from_objfile_1, above.
1071 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1073 PARENT is the original objfile if ABFD is a separate debug info file.
1074 Otherwise PARENT is NULL.
1076 Upon success, returns a pointer to the objfile that was added.
1077 Upon failure, jumps back to command level (never returns). */
1079 static struct objfile
*
1080 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
, int add_flags
,
1081 struct section_addr_info
*addrs
,
1082 int flags
, struct objfile
*parent
)
1084 struct objfile
*objfile
;
1085 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1086 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1087 const int should_print
= ((from_tty
|| info_verbose
)
1088 && (readnow_symbol_files
1089 || (add_flags
& SYMFILE_NO_READ
) == 0));
1091 if (readnow_symbol_files
)
1093 flags
|= OBJF_READNOW
;
1094 add_flags
&= ~SYMFILE_NO_READ
;
1097 /* Give user a chance to burp if we'd be
1098 interactively wiping out any existing symbols. */
1100 if ((have_full_symbols () || have_partial_symbols ())
1103 && !query (_("Load new symbol table from \"%s\"? "), name
))
1104 error (_("Not confirmed."));
1106 objfile
= allocate_objfile (abfd
, name
,
1107 flags
| (mainline
? OBJF_MAINLINE
: 0));
1110 add_separate_debug_objfile (objfile
, parent
);
1112 /* We either created a new mapped symbol table, mapped an existing
1113 symbol table file which has not had initial symbol reading
1114 performed, or need to read an unmapped symbol table. */
1117 if (deprecated_pre_add_symbol_hook
)
1118 deprecated_pre_add_symbol_hook (name
);
1121 printf_unfiltered (_("Reading symbols from %s..."), name
);
1123 gdb_flush (gdb_stdout
);
1126 syms_from_objfile (objfile
, addrs
, add_flags
);
1128 /* We now have at least a partial symbol table. Check to see if the
1129 user requested that all symbols be read on initial access via either
1130 the gdb startup command line or on a per symbol file basis. Expand
1131 all partial symbol tables for this objfile if so. */
1133 if ((flags
& OBJF_READNOW
))
1137 printf_unfiltered (_("expanding to full symbols..."));
1139 gdb_flush (gdb_stdout
);
1143 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1146 if (should_print
&& !objfile_has_symbols (objfile
))
1149 printf_unfiltered (_("(no debugging symbols found)..."));
1155 if (deprecated_post_add_symbol_hook
)
1156 deprecated_post_add_symbol_hook ();
1158 printf_unfiltered (_("done.\n"));
1161 /* We print some messages regardless of whether 'from_tty ||
1162 info_verbose' is true, so make sure they go out at the right
1164 gdb_flush (gdb_stdout
);
1166 if (objfile
->sf
== NULL
)
1168 observer_notify_new_objfile (objfile
);
1169 return objfile
; /* No symbols. */
1172 new_symfile_objfile (objfile
, add_flags
);
1174 observer_notify_new_objfile (objfile
);
1176 bfd_cache_close_all ();
1180 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1181 see allocate_objfile's definition. */
1184 symbol_file_add_separate (bfd
*bfd
, const char *name
, int symfile_flags
,
1185 struct objfile
*objfile
)
1187 struct objfile
*new_objfile
;
1188 struct section_addr_info
*sap
;
1189 struct cleanup
*my_cleanup
;
1191 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1192 because sections of BFD may not match sections of OBJFILE and because
1193 vma may have been modified by tools such as prelink. */
1194 sap
= build_section_addr_info_from_objfile (objfile
);
1195 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1197 new_objfile
= symbol_file_add_with_addrs
1198 (bfd
, name
, symfile_flags
, sap
,
1199 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1203 do_cleanups (my_cleanup
);
1206 /* Process the symbol file ABFD, as either the main file or as a
1207 dynamically loaded file.
1208 See symbol_file_add_with_addrs's comments for details. */
1211 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
, int add_flags
,
1212 struct section_addr_info
*addrs
,
1213 int flags
, struct objfile
*parent
)
1215 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1219 /* Process a symbol file, as either the main file or as a dynamically
1220 loaded file. See symbol_file_add_with_addrs's comments for details. */
1223 symbol_file_add (const char *name
, int add_flags
,
1224 struct section_addr_info
*addrs
, int flags
)
1226 bfd
*bfd
= symfile_bfd_open (name
);
1227 struct cleanup
*cleanup
= make_cleanup_bfd_unref (bfd
);
1228 struct objfile
*objf
;
1230 objf
= symbol_file_add_from_bfd (bfd
, name
, add_flags
, addrs
, flags
, NULL
);
1231 do_cleanups (cleanup
);
1235 /* Call symbol_file_add() with default values and update whatever is
1236 affected by the loading of a new main().
1237 Used when the file is supplied in the gdb command line
1238 and by some targets with special loading requirements.
1239 The auxiliary function, symbol_file_add_main_1(), has the flags
1240 argument for the switches that can only be specified in the symbol_file
1244 symbol_file_add_main (const char *args
, int from_tty
)
1246 symbol_file_add_main_1 (args
, from_tty
, 0);
1250 symbol_file_add_main_1 (const char *args
, int from_tty
, int flags
)
1252 const int add_flags
= (current_inferior ()->symfile_flags
1253 | SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0));
1255 symbol_file_add (args
, add_flags
, NULL
, flags
);
1257 /* Getting new symbols may change our opinion about
1258 what is frameless. */
1259 reinit_frame_cache ();
1261 if ((flags
& SYMFILE_NO_READ
) == 0)
1262 set_initial_language ();
1266 symbol_file_clear (int from_tty
)
1268 if ((have_full_symbols () || have_partial_symbols ())
1271 ? !query (_("Discard symbol table from `%s'? "),
1272 objfile_name (symfile_objfile
))
1273 : !query (_("Discard symbol table? "))))
1274 error (_("Not confirmed."));
1276 /* solib descriptors may have handles to objfiles. Wipe them before their
1277 objfiles get stale by free_all_objfiles. */
1278 no_shared_libraries (NULL
, from_tty
);
1280 free_all_objfiles ();
1282 gdb_assert (symfile_objfile
== NULL
);
1284 printf_unfiltered (_("No symbol file now.\n"));
1288 separate_debug_file_exists (const char *name
, unsigned long crc
,
1289 struct objfile
*parent_objfile
)
1291 unsigned long file_crc
;
1294 struct stat parent_stat
, abfd_stat
;
1295 int verified_as_different
;
1297 /* Find a separate debug info file as if symbols would be present in
1298 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1299 section can contain just the basename of PARENT_OBJFILE without any
1300 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1301 the separate debug infos with the same basename can exist. */
1303 if (filename_cmp (name
, objfile_name (parent_objfile
)) == 0)
1306 abfd
= gdb_bfd_open_maybe_remote (name
);
1311 /* Verify symlinks were not the cause of filename_cmp name difference above.
1313 Some operating systems, e.g. Windows, do not provide a meaningful
1314 st_ino; they always set it to zero. (Windows does provide a
1315 meaningful st_dev.) Do not indicate a duplicate library in that
1316 case. While there is no guarantee that a system that provides
1317 meaningful inode numbers will never set st_ino to zero, this is
1318 merely an optimization, so we do not need to worry about false
1321 if (bfd_stat (abfd
, &abfd_stat
) == 0
1322 && abfd_stat
.st_ino
!= 0
1323 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1325 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1326 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1328 gdb_bfd_unref (abfd
);
1331 verified_as_different
= 1;
1334 verified_as_different
= 0;
1336 file_crc_p
= gdb_bfd_crc (abfd
, &file_crc
);
1338 gdb_bfd_unref (abfd
);
1343 if (crc
!= file_crc
)
1345 unsigned long parent_crc
;
1347 /* If one (or both) the files are accessed for example the via "remote:"
1348 gdbserver way it does not support the bfd_stat operation. Verify
1349 whether those two files are not the same manually. */
1351 if (!verified_as_different
)
1353 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1357 if (verified_as_different
|| parent_crc
!= file_crc
)
1358 warning (_("the debug information found in \"%s\""
1359 " does not match \"%s\" (CRC mismatch).\n"),
1360 name
, objfile_name (parent_objfile
));
1368 char *debug_file_directory
= NULL
;
1370 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1371 struct cmd_list_element
*c
, const char *value
)
1373 fprintf_filtered (file
,
1374 _("The directory where separate debug "
1375 "symbols are searched for is \"%s\".\n"),
1379 #if ! defined (DEBUG_SUBDIRECTORY)
1380 #define DEBUG_SUBDIRECTORY ".debug"
1383 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1384 where the original file resides (may not be the same as
1385 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1386 looking for. CANON_DIR is the "realpath" form of DIR.
1387 DIR must contain a trailing '/'.
1388 Returns the path of the file with separate debug info, of NULL. */
1391 find_separate_debug_file (const char *dir
,
1392 const char *canon_dir
,
1393 const char *debuglink
,
1394 unsigned long crc32
, struct objfile
*objfile
)
1399 VEC (char_ptr
) *debugdir_vec
;
1400 struct cleanup
*back_to
;
1403 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1405 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1406 i
= strlen (canon_dir
);
1408 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1410 + strlen (DEBUG_SUBDIRECTORY
)
1412 + strlen (debuglink
)
1415 /* First try in the same directory as the original file. */
1416 strcpy (debugfile
, dir
);
1417 strcat (debugfile
, debuglink
);
1419 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1422 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1423 strcpy (debugfile
, dir
);
1424 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1425 strcat (debugfile
, "/");
1426 strcat (debugfile
, debuglink
);
1428 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1431 /* Then try in the global debugfile directories.
1433 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1434 cause "/..." lookups. */
1436 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1437 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1439 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1441 strcpy (debugfile
, debugdir
);
1442 strcat (debugfile
, "/");
1443 strcat (debugfile
, dir
);
1444 strcat (debugfile
, debuglink
);
1446 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1448 do_cleanups (back_to
);
1452 /* If the file is in the sysroot, try using its base path in the
1453 global debugfile directory. */
1454 if (canon_dir
!= NULL
1455 && filename_ncmp (canon_dir
, gdb_sysroot
,
1456 strlen (gdb_sysroot
)) == 0
1457 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1459 strcpy (debugfile
, debugdir
);
1460 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1461 strcat (debugfile
, "/");
1462 strcat (debugfile
, debuglink
);
1464 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1466 do_cleanups (back_to
);
1472 do_cleanups (back_to
);
1477 /* Modify PATH to contain only "[/]directory/" part of PATH.
1478 If there were no directory separators in PATH, PATH will be empty
1479 string on return. */
1482 terminate_after_last_dir_separator (char *path
)
1486 /* Strip off the final filename part, leaving the directory name,
1487 followed by a slash. The directory can be relative or absolute. */
1488 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1489 if (IS_DIR_SEPARATOR (path
[i
]))
1492 /* If I is -1 then no directory is present there and DIR will be "". */
1496 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1497 Returns pathname, or NULL. */
1500 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1503 char *dir
, *canon_dir
;
1505 unsigned long crc32
;
1506 struct cleanup
*cleanups
;
1508 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1510 if (debuglink
== NULL
)
1512 /* There's no separate debug info, hence there's no way we could
1513 load it => no warning. */
1517 cleanups
= make_cleanup (xfree
, debuglink
);
1518 dir
= xstrdup (objfile_name (objfile
));
1519 make_cleanup (xfree
, dir
);
1520 terminate_after_last_dir_separator (dir
);
1521 canon_dir
= lrealpath (dir
);
1523 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1527 if (debugfile
== NULL
)
1530 /* For PR gdb/9538, try again with realpath (if different from the
1535 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1536 && S_ISLNK (st_buf
.st_mode
))
1540 symlink_dir
= lrealpath (objfile_name (objfile
));
1541 if (symlink_dir
!= NULL
)
1543 make_cleanup (xfree
, symlink_dir
);
1544 terminate_after_last_dir_separator (symlink_dir
);
1545 if (strcmp (dir
, symlink_dir
) != 0)
1547 /* Different directory, so try using it. */
1548 debugfile
= find_separate_debug_file (symlink_dir
,
1556 #endif /* HAVE_LSTAT */
1559 do_cleanups (cleanups
);
1563 /* This is the symbol-file command. Read the file, analyze its
1564 symbols, and add a struct symtab to a symtab list. The syntax of
1565 the command is rather bizarre:
1567 1. The function buildargv implements various quoting conventions
1568 which are undocumented and have little or nothing in common with
1569 the way things are quoted (or not quoted) elsewhere in GDB.
1571 2. Options are used, which are not generally used in GDB (perhaps
1572 "set mapped on", "set readnow on" would be better)
1574 3. The order of options matters, which is contrary to GNU
1575 conventions (because it is confusing and inconvenient). */
1578 symbol_file_command (char *args
, int from_tty
)
1584 symbol_file_clear (from_tty
);
1588 char **argv
= gdb_buildargv (args
);
1589 int flags
= OBJF_USERLOADED
;
1590 struct cleanup
*cleanups
;
1593 cleanups
= make_cleanup_freeargv (argv
);
1594 while (*argv
!= NULL
)
1596 if (strcmp (*argv
, "-readnow") == 0)
1597 flags
|= OBJF_READNOW
;
1598 else if (**argv
== '-')
1599 error (_("unknown option `%s'"), *argv
);
1602 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1610 error (_("no symbol file name was specified"));
1612 do_cleanups (cleanups
);
1616 /* Set the initial language.
1618 FIXME: A better solution would be to record the language in the
1619 psymtab when reading partial symbols, and then use it (if known) to
1620 set the language. This would be a win for formats that encode the
1621 language in an easily discoverable place, such as DWARF. For
1622 stabs, we can jump through hoops looking for specially named
1623 symbols or try to intuit the language from the specific type of
1624 stabs we find, but we can't do that until later when we read in
1628 set_initial_language (void)
1630 enum language lang
= language_unknown
;
1632 if (language_of_main
!= language_unknown
)
1633 lang
= language_of_main
;
1636 char *name
= main_name ();
1637 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
);
1640 lang
= SYMBOL_LANGUAGE (sym
);
1643 if (lang
== language_unknown
)
1645 /* Make C the default language */
1649 set_language (lang
);
1650 expected_language
= current_language
; /* Don't warn the user. */
1653 /* If NAME is a remote name open the file using remote protocol, otherwise
1654 open it normally. Returns a new reference to the BFD. On error,
1655 returns NULL with the BFD error set. */
1658 gdb_bfd_open_maybe_remote (const char *name
)
1662 if (remote_filename_p (name
))
1663 result
= remote_bfd_open (name
, gnutarget
);
1665 result
= gdb_bfd_open (name
, gnutarget
, -1);
1670 /* Open the file specified by NAME and hand it off to BFD for
1671 preliminary analysis. Return a newly initialized bfd *, which
1672 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1673 absolute). In case of trouble, error() is called. */
1676 symfile_bfd_open (const char *cname
)
1680 char *name
, *absolute_name
;
1681 struct cleanup
*back_to
;
1683 if (remote_filename_p (cname
))
1685 sym_bfd
= remote_bfd_open (cname
, gnutarget
);
1687 error (_("`%s': can't open to read symbols: %s."), cname
,
1688 bfd_errmsg (bfd_get_error ()));
1690 if (!bfd_check_format (sym_bfd
, bfd_object
))
1692 make_cleanup_bfd_unref (sym_bfd
);
1693 error (_("`%s': can't read symbols: %s."), cname
,
1694 bfd_errmsg (bfd_get_error ()));
1700 name
= tilde_expand (cname
); /* Returns 1st new malloc'd copy. */
1702 /* Look down path for it, allocate 2nd new malloc'd copy. */
1703 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
, name
,
1704 O_RDONLY
| O_BINARY
, &absolute_name
);
1705 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1708 char *exename
= alloca (strlen (name
) + 5);
1710 strcat (strcpy (exename
, name
), ".exe");
1711 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1712 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1717 make_cleanup (xfree
, name
);
1718 perror_with_name (name
);
1722 name
= absolute_name
;
1723 back_to
= make_cleanup (xfree
, name
);
1725 sym_bfd
= gdb_bfd_open (name
, gnutarget
, desc
);
1727 error (_("`%s': can't open to read symbols: %s."), name
,
1728 bfd_errmsg (bfd_get_error ()));
1729 bfd_set_cacheable (sym_bfd
, 1);
1731 if (!bfd_check_format (sym_bfd
, bfd_object
))
1733 make_cleanup_bfd_unref (sym_bfd
);
1734 error (_("`%s': can't read symbols: %s."), name
,
1735 bfd_errmsg (bfd_get_error ()));
1738 do_cleanups (back_to
);
1743 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1744 the section was not found. */
1747 get_section_index (struct objfile
*objfile
, char *section_name
)
1749 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1757 /* Link SF into the global symtab_fns list.
1758 FLAVOUR is the file format that SF handles.
1759 Called on startup by the _initialize routine in each object file format
1760 reader, to register information about each format the reader is prepared
1764 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1766 registered_sym_fns fns
= { flavour
, sf
};
1768 VEC_safe_push (registered_sym_fns
, symtab_fns
, &fns
);
1771 /* Initialize OBJFILE to read symbols from its associated BFD. It
1772 either returns or calls error(). The result is an initialized
1773 struct sym_fns in the objfile structure, that contains cached
1774 information about the symbol file. */
1776 static const struct sym_fns
*
1777 find_sym_fns (bfd
*abfd
)
1779 registered_sym_fns
*rsf
;
1780 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1783 if (our_flavour
== bfd_target_srec_flavour
1784 || our_flavour
== bfd_target_ihex_flavour
1785 || our_flavour
== bfd_target_tekhex_flavour
)
1786 return NULL
; /* No symbols. */
1788 for (i
= 0; VEC_iterate (registered_sym_fns
, symtab_fns
, i
, rsf
); ++i
)
1789 if (our_flavour
== rsf
->sym_flavour
)
1790 return rsf
->sym_fns
;
1792 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1793 bfd_get_target (abfd
));
1797 /* This function runs the load command of our current target. */
1800 load_command (char *arg
, int from_tty
)
1802 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1806 /* The user might be reloading because the binary has changed. Take
1807 this opportunity to check. */
1808 reopen_exec_file ();
1816 parg
= arg
= get_exec_file (1);
1818 /* Count how many \ " ' tab space there are in the name. */
1819 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1827 /* We need to quote this string so buildargv can pull it apart. */
1828 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1832 make_cleanup (xfree
, temp
);
1835 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1837 strncpy (ptemp
, prev
, parg
- prev
);
1838 ptemp
+= parg
- prev
;
1842 strcpy (ptemp
, prev
);
1848 target_load (arg
, from_tty
);
1850 /* After re-loading the executable, we don't really know which
1851 overlays are mapped any more. */
1852 overlay_cache_invalid
= 1;
1854 do_cleanups (cleanup
);
1857 /* This version of "load" should be usable for any target. Currently
1858 it is just used for remote targets, not inftarg.c or core files,
1859 on the theory that only in that case is it useful.
1861 Avoiding xmodem and the like seems like a win (a) because we don't have
1862 to worry about finding it, and (b) On VMS, fork() is very slow and so
1863 we don't want to run a subprocess. On the other hand, I'm not sure how
1864 performance compares. */
1866 static int validate_download
= 0;
1868 /* Callback service function for generic_load (bfd_map_over_sections). */
1871 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1873 bfd_size_type
*sum
= data
;
1875 *sum
+= bfd_get_section_size (asec
);
1878 /* Opaque data for load_section_callback. */
1879 struct load_section_data
{
1880 CORE_ADDR load_offset
;
1881 struct load_progress_data
*progress_data
;
1882 VEC(memory_write_request_s
) *requests
;
1885 /* Opaque data for load_progress. */
1886 struct load_progress_data
{
1887 /* Cumulative data. */
1888 unsigned long write_count
;
1889 unsigned long data_count
;
1890 bfd_size_type total_size
;
1893 /* Opaque data for load_progress for a single section. */
1894 struct load_progress_section_data
{
1895 struct load_progress_data
*cumulative
;
1897 /* Per-section data. */
1898 const char *section_name
;
1899 ULONGEST section_sent
;
1900 ULONGEST section_size
;
1905 /* Target write callback routine for progress reporting. */
1908 load_progress (ULONGEST bytes
, void *untyped_arg
)
1910 struct load_progress_section_data
*args
= untyped_arg
;
1911 struct load_progress_data
*totals
;
1914 /* Writing padding data. No easy way to get at the cumulative
1915 stats, so just ignore this. */
1918 totals
= args
->cumulative
;
1920 if (bytes
== 0 && args
->section_sent
== 0)
1922 /* The write is just starting. Let the user know we've started
1924 ui_out_message (current_uiout
, 0, "Loading section %s, size %s lma %s\n",
1925 args
->section_name
, hex_string (args
->section_size
),
1926 paddress (target_gdbarch (), args
->lma
));
1930 if (validate_download
)
1932 /* Broken memories and broken monitors manifest themselves here
1933 when bring new computers to life. This doubles already slow
1935 /* NOTE: cagney/1999-10-18: A more efficient implementation
1936 might add a verify_memory() method to the target vector and
1937 then use that. remote.c could implement that method using
1938 the ``qCRC'' packet. */
1939 gdb_byte
*check
= xmalloc (bytes
);
1940 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1942 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1943 error (_("Download verify read failed at %s"),
1944 paddress (target_gdbarch (), args
->lma
));
1945 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1946 error (_("Download verify compare failed at %s"),
1947 paddress (target_gdbarch (), args
->lma
));
1948 do_cleanups (verify_cleanups
);
1950 totals
->data_count
+= bytes
;
1952 args
->buffer
+= bytes
;
1953 totals
->write_count
+= 1;
1954 args
->section_sent
+= bytes
;
1955 if (check_quit_flag ()
1956 || (deprecated_ui_load_progress_hook
!= NULL
1957 && deprecated_ui_load_progress_hook (args
->section_name
,
1958 args
->section_sent
)))
1959 error (_("Canceled the download"));
1961 if (deprecated_show_load_progress
!= NULL
)
1962 deprecated_show_load_progress (args
->section_name
,
1966 totals
->total_size
);
1969 /* Callback service function for generic_load (bfd_map_over_sections). */
1972 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1974 struct memory_write_request
*new_request
;
1975 struct load_section_data
*args
= data
;
1976 struct load_progress_section_data
*section_data
;
1977 bfd_size_type size
= bfd_get_section_size (asec
);
1979 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1981 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1987 new_request
= VEC_safe_push (memory_write_request_s
,
1988 args
->requests
, NULL
);
1989 memset (new_request
, 0, sizeof (struct memory_write_request
));
1990 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1991 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1992 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
1994 new_request
->data
= xmalloc (size
);
1995 new_request
->baton
= section_data
;
1997 buffer
= new_request
->data
;
1999 section_data
->cumulative
= args
->progress_data
;
2000 section_data
->section_name
= sect_name
;
2001 section_data
->section_size
= size
;
2002 section_data
->lma
= new_request
->begin
;
2003 section_data
->buffer
= buffer
;
2005 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2008 /* Clean up an entire memory request vector, including load
2009 data and progress records. */
2012 clear_memory_write_data (void *arg
)
2014 VEC(memory_write_request_s
) **vec_p
= arg
;
2015 VEC(memory_write_request_s
) *vec
= *vec_p
;
2017 struct memory_write_request
*mr
;
2019 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2024 VEC_free (memory_write_request_s
, vec
);
2028 generic_load (char *args
, int from_tty
)
2031 struct timeval start_time
, end_time
;
2033 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2034 struct load_section_data cbdata
;
2035 struct load_progress_data total_progress
;
2036 struct ui_out
*uiout
= current_uiout
;
2041 memset (&cbdata
, 0, sizeof (cbdata
));
2042 memset (&total_progress
, 0, sizeof (total_progress
));
2043 cbdata
.progress_data
= &total_progress
;
2045 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2048 error_no_arg (_("file to load"));
2050 argv
= gdb_buildargv (args
);
2051 make_cleanup_freeargv (argv
);
2053 filename
= tilde_expand (argv
[0]);
2054 make_cleanup (xfree
, filename
);
2056 if (argv
[1] != NULL
)
2060 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2062 /* If the last word was not a valid number then
2063 treat it as a file name with spaces in. */
2064 if (argv
[1] == endptr
)
2065 error (_("Invalid download offset:%s."), argv
[1]);
2067 if (argv
[2] != NULL
)
2068 error (_("Too many parameters."));
2071 /* Open the file for loading. */
2072 loadfile_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2073 if (loadfile_bfd
== NULL
)
2075 perror_with_name (filename
);
2079 make_cleanup_bfd_unref (loadfile_bfd
);
2081 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2083 error (_("\"%s\" is not an object file: %s"), filename
,
2084 bfd_errmsg (bfd_get_error ()));
2087 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2088 (void *) &total_progress
.total_size
);
2090 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2092 gettimeofday (&start_time
, NULL
);
2094 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2095 load_progress
) != 0)
2096 error (_("Load failed"));
2098 gettimeofday (&end_time
, NULL
);
2100 entry
= bfd_get_start_address (loadfile_bfd
);
2101 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2102 ui_out_text (uiout
, "Start address ");
2103 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch (), entry
));
2104 ui_out_text (uiout
, ", load size ");
2105 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2106 ui_out_text (uiout
, "\n");
2107 /* We were doing this in remote-mips.c, I suspect it is right
2108 for other targets too. */
2109 regcache_write_pc (get_current_regcache (), entry
);
2111 /* Reset breakpoints, now that we have changed the load image. For
2112 instance, breakpoints may have been set (or reset, by
2113 post_create_inferior) while connected to the target but before we
2114 loaded the program. In that case, the prologue analyzer could
2115 have read instructions from the target to find the right
2116 breakpoint locations. Loading has changed the contents of that
2119 breakpoint_re_set ();
2121 /* FIXME: are we supposed to call symbol_file_add or not? According
2122 to a comment from remote-mips.c (where a call to symbol_file_add
2123 was commented out), making the call confuses GDB if more than one
2124 file is loaded in. Some targets do (e.g., remote-vx.c) but
2125 others don't (or didn't - perhaps they have all been deleted). */
2127 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2128 total_progress
.write_count
,
2129 &start_time
, &end_time
);
2131 do_cleanups (old_cleanups
);
2134 /* Report how fast the transfer went. */
2137 print_transfer_performance (struct ui_file
*stream
,
2138 unsigned long data_count
,
2139 unsigned long write_count
,
2140 const struct timeval
*start_time
,
2141 const struct timeval
*end_time
)
2143 ULONGEST time_count
;
2144 struct ui_out
*uiout
= current_uiout
;
2146 /* Compute the elapsed time in milliseconds, as a tradeoff between
2147 accuracy and overflow. */
2148 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2149 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2151 ui_out_text (uiout
, "Transfer rate: ");
2154 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2156 if (ui_out_is_mi_like_p (uiout
))
2158 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2159 ui_out_text (uiout
, " bits/sec");
2161 else if (rate
< 1024)
2163 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2164 ui_out_text (uiout
, " bytes/sec");
2168 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2169 ui_out_text (uiout
, " KB/sec");
2174 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2175 ui_out_text (uiout
, " bits in <1 sec");
2177 if (write_count
> 0)
2179 ui_out_text (uiout
, ", ");
2180 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2181 ui_out_text (uiout
, " bytes/write");
2183 ui_out_text (uiout
, ".\n");
2186 /* This function allows the addition of incrementally linked object files.
2187 It does not modify any state in the target, only in the debugger. */
2188 /* Note: ezannoni 2000-04-13 This function/command used to have a
2189 special case syntax for the rombug target (Rombug is the boot
2190 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2191 rombug case, the user doesn't need to supply a text address,
2192 instead a call to target_link() (in target.c) would supply the
2193 value to use. We are now discontinuing this type of ad hoc syntax. */
2196 add_symbol_file_command (char *args
, int from_tty
)
2198 struct gdbarch
*gdbarch
= get_current_arch ();
2199 char *filename
= NULL
;
2200 int flags
= OBJF_USERLOADED
;
2202 int section_index
= 0;
2206 int expecting_sec_name
= 0;
2207 int expecting_sec_addr
= 0;
2216 struct section_addr_info
*section_addrs
;
2217 struct sect_opt
*sect_opts
= NULL
;
2218 size_t num_sect_opts
= 0;
2219 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2222 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2223 * sizeof (struct sect_opt
));
2228 error (_("add-symbol-file takes a file name and an address"));
2230 argv
= gdb_buildargv (args
);
2231 make_cleanup_freeargv (argv
);
2233 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2235 /* Process the argument. */
2238 /* The first argument is the file name. */
2239 filename
= tilde_expand (arg
);
2240 make_cleanup (xfree
, filename
);
2242 else if (argcnt
== 1)
2244 /* The second argument is always the text address at which
2245 to load the program. */
2246 sect_opts
[section_index
].name
= ".text";
2247 sect_opts
[section_index
].value
= arg
;
2248 if (++section_index
>= num_sect_opts
)
2251 sect_opts
= ((struct sect_opt
*)
2252 xrealloc (sect_opts
,
2254 * sizeof (struct sect_opt
)));
2259 /* It's an option (starting with '-') or it's an argument
2261 if (expecting_sec_name
)
2263 sect_opts
[section_index
].name
= arg
;
2264 expecting_sec_name
= 0;
2266 else if (expecting_sec_addr
)
2268 sect_opts
[section_index
].value
= arg
;
2269 expecting_sec_addr
= 0;
2270 if (++section_index
>= num_sect_opts
)
2273 sect_opts
= ((struct sect_opt
*)
2274 xrealloc (sect_opts
,
2276 * sizeof (struct sect_opt
)));
2279 else if (strcmp (arg
, "-readnow") == 0)
2280 flags
|= OBJF_READNOW
;
2281 else if (strcmp (arg
, "-s") == 0)
2283 expecting_sec_name
= 1;
2284 expecting_sec_addr
= 1;
2287 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2288 " [-readnow] [-s <secname> <addr>]*"));
2292 /* This command takes at least two arguments. The first one is a
2293 filename, and the second is the address where this file has been
2294 loaded. Abort now if this address hasn't been provided by the
2296 if (section_index
< 1)
2297 error (_("The address where %s has been loaded is missing"), filename
);
2299 /* Print the prompt for the query below. And save the arguments into
2300 a sect_addr_info structure to be passed around to other
2301 functions. We have to split this up into separate print
2302 statements because hex_string returns a local static
2305 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2306 section_addrs
= alloc_section_addr_info (section_index
);
2307 make_cleanup (xfree
, section_addrs
);
2308 for (i
= 0; i
< section_index
; i
++)
2311 char *val
= sect_opts
[i
].value
;
2312 char *sec
= sect_opts
[i
].name
;
2314 addr
= parse_and_eval_address (val
);
2316 /* Here we store the section offsets in the order they were
2317 entered on the command line. */
2318 section_addrs
->other
[sec_num
].name
= sec
;
2319 section_addrs
->other
[sec_num
].addr
= addr
;
2320 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2321 paddress (gdbarch
, addr
));
2324 /* The object's sections are initialized when a
2325 call is made to build_objfile_section_table (objfile).
2326 This happens in reread_symbols.
2327 At this point, we don't know what file type this is,
2328 so we can't determine what section names are valid. */
2330 section_addrs
->num_sections
= sec_num
;
2332 if (from_tty
&& (!query ("%s", "")))
2333 error (_("Not confirmed."));
2335 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2336 section_addrs
, flags
);
2338 /* Getting new symbols may change our opinion about what is
2340 reinit_frame_cache ();
2341 do_cleanups (my_cleanups
);
2345 typedef struct objfile
*objfilep
;
2347 DEF_VEC_P (objfilep
);
2349 /* Re-read symbols if a symbol-file has changed. */
2352 reread_symbols (void)
2354 struct objfile
*objfile
;
2356 struct stat new_statbuf
;
2358 VEC (objfilep
) *new_objfiles
= NULL
;
2359 struct cleanup
*all_cleanups
;
2361 all_cleanups
= make_cleanup (VEC_cleanup (objfilep
), &new_objfiles
);
2363 /* With the addition of shared libraries, this should be modified,
2364 the load time should be saved in the partial symbol tables, since
2365 different tables may come from different source files. FIXME.
2366 This routine should then walk down each partial symbol table
2367 and see if the symbol table that it originates from has been changed. */
2369 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2371 if (objfile
->obfd
== NULL
)
2374 /* Separate debug objfiles are handled in the main objfile. */
2375 if (objfile
->separate_debug_objfile_backlink
)
2378 /* If this object is from an archive (what you usually create with
2379 `ar', often called a `static library' on most systems, though
2380 a `shared library' on AIX is also an archive), then you should
2381 stat on the archive name, not member name. */
2382 if (objfile
->obfd
->my_archive
)
2383 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2385 res
= stat (objfile_name (objfile
), &new_statbuf
);
2388 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2389 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2390 objfile_name (objfile
));
2393 new_modtime
= new_statbuf
.st_mtime
;
2394 if (new_modtime
!= objfile
->mtime
)
2396 struct cleanup
*old_cleanups
;
2397 struct section_offsets
*offsets
;
2399 char *original_name
;
2401 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2402 objfile_name (objfile
));
2404 /* There are various functions like symbol_file_add,
2405 symfile_bfd_open, syms_from_objfile, etc., which might
2406 appear to do what we want. But they have various other
2407 effects which we *don't* want. So we just do stuff
2408 ourselves. We don't worry about mapped files (for one thing,
2409 any mapped file will be out of date). */
2411 /* If we get an error, blow away this objfile (not sure if
2412 that is the correct response for things like shared
2414 old_cleanups
= make_cleanup_free_objfile (objfile
);
2415 /* We need to do this whenever any symbols go away. */
2416 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2418 if (exec_bfd
!= NULL
2419 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2420 bfd_get_filename (exec_bfd
)) == 0)
2422 /* Reload EXEC_BFD without asking anything. */
2424 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2427 /* Keep the calls order approx. the same as in free_objfile. */
2429 /* Free the separate debug objfiles. It will be
2430 automatically recreated by sym_read. */
2431 free_objfile_separate_debug (objfile
);
2433 /* Remove any references to this objfile in the global
2435 preserve_values (objfile
);
2437 /* Nuke all the state that we will re-read. Much of the following
2438 code which sets things to NULL really is necessary to tell
2439 other parts of GDB that there is nothing currently there.
2441 Try to keep the freeing order compatible with free_objfile. */
2443 if (objfile
->sf
!= NULL
)
2445 (*objfile
->sf
->sym_finish
) (objfile
);
2448 clear_objfile_data (objfile
);
2450 /* Clean up any state BFD has sitting around. */
2452 struct bfd
*obfd
= objfile
->obfd
;
2453 char *obfd_filename
;
2455 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2456 /* Open the new BFD before freeing the old one, so that
2457 the filename remains live. */
2458 objfile
->obfd
= gdb_bfd_open_maybe_remote (obfd_filename
);
2459 if (objfile
->obfd
== NULL
)
2461 /* We have to make a cleanup and error here, rather
2462 than erroring later, because once we unref OBFD,
2463 OBFD_FILENAME will be freed. */
2464 make_cleanup_bfd_unref (obfd
);
2465 error (_("Can't open %s to read symbols."), obfd_filename
);
2467 gdb_bfd_unref (obfd
);
2470 original_name
= xstrdup (objfile
->original_name
);
2471 make_cleanup (xfree
, original_name
);
2473 /* bfd_openr sets cacheable to true, which is what we want. */
2474 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2475 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2476 bfd_errmsg (bfd_get_error ()));
2478 /* Save the offsets, we will nuke them with the rest of the
2480 num_offsets
= objfile
->num_sections
;
2481 offsets
= ((struct section_offsets
*)
2482 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2483 memcpy (offsets
, objfile
->section_offsets
,
2484 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2486 /* FIXME: Do we have to free a whole linked list, or is this
2488 if (objfile
->global_psymbols
.list
)
2489 xfree (objfile
->global_psymbols
.list
);
2490 memset (&objfile
->global_psymbols
, 0,
2491 sizeof (objfile
->global_psymbols
));
2492 if (objfile
->static_psymbols
.list
)
2493 xfree (objfile
->static_psymbols
.list
);
2494 memset (&objfile
->static_psymbols
, 0,
2495 sizeof (objfile
->static_psymbols
));
2497 /* Free the obstacks for non-reusable objfiles. */
2498 psymbol_bcache_free (objfile
->psymbol_cache
);
2499 objfile
->psymbol_cache
= psymbol_bcache_init ();
2500 if (objfile
->demangled_names_hash
!= NULL
)
2502 htab_delete (objfile
->demangled_names_hash
);
2503 objfile
->demangled_names_hash
= NULL
;
2505 obstack_free (&objfile
->objfile_obstack
, 0);
2506 objfile
->sections
= NULL
;
2507 objfile
->symtabs
= NULL
;
2508 objfile
->psymtabs
= NULL
;
2509 objfile
->psymtabs_addrmap
= NULL
;
2510 objfile
->free_psymtabs
= NULL
;
2511 objfile
->template_symbols
= NULL
;
2512 objfile
->msymbols
= NULL
;
2513 objfile
->minimal_symbol_count
= 0;
2514 memset (&objfile
->msymbol_hash
, 0,
2515 sizeof (objfile
->msymbol_hash
));
2516 memset (&objfile
->msymbol_demangled_hash
, 0,
2517 sizeof (objfile
->msymbol_demangled_hash
));
2519 set_objfile_per_bfd (objfile
);
2521 /* obstack_init also initializes the obstack so it is
2522 empty. We could use obstack_specify_allocation but
2523 gdb_obstack.h specifies the alloc/dealloc functions. */
2524 obstack_init (&objfile
->objfile_obstack
);
2526 objfile
->original_name
= obstack_copy0 (&objfile
->objfile_obstack
,
2528 strlen (original_name
));
2530 /* Reset the sym_fns pointer. The ELF reader can change it
2531 based on whether .gdb_index is present, and we need it to
2532 start over. PR symtab/15885 */
2533 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2535 build_objfile_section_table (objfile
);
2536 terminate_minimal_symbol_table (objfile
);
2538 /* We use the same section offsets as from last time. I'm not
2539 sure whether that is always correct for shared libraries. */
2540 objfile
->section_offsets
= (struct section_offsets
*)
2541 obstack_alloc (&objfile
->objfile_obstack
,
2542 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2543 memcpy (objfile
->section_offsets
, offsets
,
2544 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2545 objfile
->num_sections
= num_offsets
;
2547 /* What the hell is sym_new_init for, anyway? The concept of
2548 distinguishing between the main file and additional files
2549 in this way seems rather dubious. */
2550 if (objfile
== symfile_objfile
)
2552 (*objfile
->sf
->sym_new_init
) (objfile
);
2555 (*objfile
->sf
->sym_init
) (objfile
);
2556 clear_complaints (&symfile_complaints
, 1, 1);
2558 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2559 read_symbols (objfile
, 0);
2561 if (!objfile_has_symbols (objfile
))
2564 printf_unfiltered (_("(no debugging symbols found)\n"));
2568 /* We're done reading the symbol file; finish off complaints. */
2569 clear_complaints (&symfile_complaints
, 0, 1);
2571 /* Getting new symbols may change our opinion about what is
2574 reinit_frame_cache ();
2576 /* Discard cleanups as symbol reading was successful. */
2577 discard_cleanups (old_cleanups
);
2579 /* If the mtime has changed between the time we set new_modtime
2580 and now, we *want* this to be out of date, so don't call stat
2582 objfile
->mtime
= new_modtime
;
2583 init_entry_point_info (objfile
);
2585 VEC_safe_push (objfilep
, new_objfiles
, objfile
);
2593 /* Notify objfiles that we've modified objfile sections. */
2594 objfiles_changed ();
2596 clear_symtab_users (0);
2598 /* clear_objfile_data for each objfile was called before freeing it and
2599 observer_notify_new_objfile (NULL) has been called by
2600 clear_symtab_users above. Notify the new files now. */
2601 for (ix
= 0; VEC_iterate (objfilep
, new_objfiles
, ix
, objfile
); ix
++)
2602 observer_notify_new_objfile (objfile
);
2604 /* At least one objfile has changed, so we can consider that
2605 the executable we're debugging has changed too. */
2606 observer_notify_executable_changed ();
2609 do_cleanups (all_cleanups
);
2620 static filename_language
*filename_language_table
;
2621 static int fl_table_size
, fl_table_next
;
2624 add_filename_language (char *ext
, enum language lang
)
2626 if (fl_table_next
>= fl_table_size
)
2628 fl_table_size
+= 10;
2629 filename_language_table
=
2630 xrealloc (filename_language_table
,
2631 fl_table_size
* sizeof (*filename_language_table
));
2634 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2635 filename_language_table
[fl_table_next
].lang
= lang
;
2639 static char *ext_args
;
2641 show_ext_args (struct ui_file
*file
, int from_tty
,
2642 struct cmd_list_element
*c
, const char *value
)
2644 fprintf_filtered (file
,
2645 _("Mapping between filename extension "
2646 "and source language is \"%s\".\n"),
2651 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2654 char *cp
= ext_args
;
2657 /* First arg is filename extension, starting with '.' */
2659 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2661 /* Find end of first arg. */
2662 while (*cp
&& !isspace (*cp
))
2666 error (_("'%s': two arguments required -- "
2667 "filename extension and language"),
2670 /* Null-terminate first arg. */
2673 /* Find beginning of second arg, which should be a source language. */
2674 cp
= skip_spaces (cp
);
2677 error (_("'%s': two arguments required -- "
2678 "filename extension and language"),
2681 /* Lookup the language from among those we know. */
2682 lang
= language_enum (cp
);
2684 /* Now lookup the filename extension: do we already know it? */
2685 for (i
= 0; i
< fl_table_next
; i
++)
2686 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2689 if (i
>= fl_table_next
)
2691 /* New file extension. */
2692 add_filename_language (ext_args
, lang
);
2696 /* Redefining a previously known filename extension. */
2699 /* query ("Really make files of type %s '%s'?", */
2700 /* ext_args, language_str (lang)); */
2702 xfree (filename_language_table
[i
].ext
);
2703 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2704 filename_language_table
[i
].lang
= lang
;
2709 info_ext_lang_command (char *args
, int from_tty
)
2713 printf_filtered (_("Filename extensions and the languages they represent:"));
2714 printf_filtered ("\n\n");
2715 for (i
= 0; i
< fl_table_next
; i
++)
2716 printf_filtered ("\t%s\t- %s\n",
2717 filename_language_table
[i
].ext
,
2718 language_str (filename_language_table
[i
].lang
));
2722 init_filename_language_table (void)
2724 if (fl_table_size
== 0) /* Protect against repetition. */
2728 filename_language_table
=
2729 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2730 add_filename_language (".c", language_c
);
2731 add_filename_language (".d", language_d
);
2732 add_filename_language (".C", language_cplus
);
2733 add_filename_language (".cc", language_cplus
);
2734 add_filename_language (".cp", language_cplus
);
2735 add_filename_language (".cpp", language_cplus
);
2736 add_filename_language (".cxx", language_cplus
);
2737 add_filename_language (".c++", language_cplus
);
2738 add_filename_language (".java", language_java
);
2739 add_filename_language (".class", language_java
);
2740 add_filename_language (".m", language_objc
);
2741 add_filename_language (".f", language_fortran
);
2742 add_filename_language (".F", language_fortran
);
2743 add_filename_language (".for", language_fortran
);
2744 add_filename_language (".FOR", language_fortran
);
2745 add_filename_language (".ftn", language_fortran
);
2746 add_filename_language (".FTN", language_fortran
);
2747 add_filename_language (".fpp", language_fortran
);
2748 add_filename_language (".FPP", language_fortran
);
2749 add_filename_language (".f90", language_fortran
);
2750 add_filename_language (".F90", language_fortran
);
2751 add_filename_language (".f95", language_fortran
);
2752 add_filename_language (".F95", language_fortran
);
2753 add_filename_language (".f03", language_fortran
);
2754 add_filename_language (".F03", language_fortran
);
2755 add_filename_language (".f08", language_fortran
);
2756 add_filename_language (".F08", language_fortran
);
2757 add_filename_language (".s", language_asm
);
2758 add_filename_language (".sx", language_asm
);
2759 add_filename_language (".S", language_asm
);
2760 add_filename_language (".pas", language_pascal
);
2761 add_filename_language (".p", language_pascal
);
2762 add_filename_language (".pp", language_pascal
);
2763 add_filename_language (".adb", language_ada
);
2764 add_filename_language (".ads", language_ada
);
2765 add_filename_language (".a", language_ada
);
2766 add_filename_language (".ada", language_ada
);
2767 add_filename_language (".dg", language_ada
);
2772 deduce_language_from_filename (const char *filename
)
2777 if (filename
!= NULL
)
2778 if ((cp
= strrchr (filename
, '.')) != NULL
)
2779 for (i
= 0; i
< fl_table_next
; i
++)
2780 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2781 return filename_language_table
[i
].lang
;
2783 return language_unknown
;
2788 Allocate and partly initialize a new symbol table. Return a pointer
2789 to it. error() if no space.
2791 Caller must set these fields:
2800 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2802 struct symtab
*symtab
;
2804 symtab
= (struct symtab
*)
2805 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2806 memset (symtab
, 0, sizeof (*symtab
));
2807 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2808 objfile
->per_bfd
->filename_cache
);
2809 symtab
->fullname
= NULL
;
2810 symtab
->language
= deduce_language_from_filename (filename
);
2811 symtab
->debugformat
= "unknown";
2813 /* Hook it to the objfile it comes from. */
2815 symtab
->objfile
= objfile
;
2816 symtab
->next
= objfile
->symtabs
;
2817 objfile
->symtabs
= symtab
;
2819 if (symtab_create_debug
)
2821 /* Be a bit clever with debugging messages, and don't print objfile
2822 every time, only when it changes. */
2823 static char *last_objfile_name
= NULL
;
2825 if (last_objfile_name
== NULL
2826 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2828 xfree (last_objfile_name
);
2829 last_objfile_name
= xstrdup (objfile_name (objfile
));
2830 fprintf_unfiltered (gdb_stdlog
,
2831 "Creating one or more symtabs for objfile %s ...\n",
2834 fprintf_unfiltered (gdb_stdlog
,
2835 "Created symtab %s for module %s.\n",
2836 host_address_to_string (symtab
), filename
);
2843 /* Reset all data structures in gdb which may contain references to symbol
2844 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2847 clear_symtab_users (int add_flags
)
2849 /* Someday, we should do better than this, by only blowing away
2850 the things that really need to be blown. */
2852 /* Clear the "current" symtab first, because it is no longer valid.
2853 breakpoint_re_set may try to access the current symtab. */
2854 clear_current_source_symtab_and_line ();
2857 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2858 breakpoint_re_set ();
2859 clear_last_displayed_sal ();
2860 clear_pc_function_cache ();
2861 observer_notify_new_objfile (NULL
);
2863 /* Clear globals which might have pointed into a removed objfile.
2864 FIXME: It's not clear which of these are supposed to persist
2865 between expressions and which ought to be reset each time. */
2866 expression_context_block
= NULL
;
2867 innermost_block
= NULL
;
2869 /* Varobj may refer to old symbols, perform a cleanup. */
2870 varobj_invalidate ();
2875 clear_symtab_users_cleanup (void *ignore
)
2877 clear_symtab_users (0);
2881 The following code implements an abstraction for debugging overlay sections.
2883 The target model is as follows:
2884 1) The gnu linker will permit multiple sections to be mapped into the
2885 same VMA, each with its own unique LMA (or load address).
2886 2) It is assumed that some runtime mechanism exists for mapping the
2887 sections, one by one, from the load address into the VMA address.
2888 3) This code provides a mechanism for gdb to keep track of which
2889 sections should be considered to be mapped from the VMA to the LMA.
2890 This information is used for symbol lookup, and memory read/write.
2891 For instance, if a section has been mapped then its contents
2892 should be read from the VMA, otherwise from the LMA.
2894 Two levels of debugger support for overlays are available. One is
2895 "manual", in which the debugger relies on the user to tell it which
2896 overlays are currently mapped. This level of support is
2897 implemented entirely in the core debugger, and the information about
2898 whether a section is mapped is kept in the objfile->obj_section table.
2900 The second level of support is "automatic", and is only available if
2901 the target-specific code provides functionality to read the target's
2902 overlay mapping table, and translate its contents for the debugger
2903 (by updating the mapped state information in the obj_section tables).
2905 The interface is as follows:
2907 overlay map <name> -- tell gdb to consider this section mapped
2908 overlay unmap <name> -- tell gdb to consider this section unmapped
2909 overlay list -- list the sections that GDB thinks are mapped
2910 overlay read-target -- get the target's state of what's mapped
2911 overlay off/manual/auto -- set overlay debugging state
2912 Functional interface:
2913 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2914 section, return that section.
2915 find_pc_overlay(pc): find any overlay section that contains
2916 the pc, either in its VMA or its LMA
2917 section_is_mapped(sect): true if overlay is marked as mapped
2918 section_is_overlay(sect): true if section's VMA != LMA
2919 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2920 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2921 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2922 overlay_mapped_address(...): map an address from section's LMA to VMA
2923 overlay_unmapped_address(...): map an address from section's VMA to LMA
2924 symbol_overlayed_address(...): Return a "current" address for symbol:
2925 either in VMA or LMA depending on whether
2926 the symbol's section is currently mapped. */
2928 /* Overlay debugging state: */
2930 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2931 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2933 /* Function: section_is_overlay (SECTION)
2934 Returns true if SECTION has VMA not equal to LMA, ie.
2935 SECTION is loaded at an address different from where it will "run". */
2938 section_is_overlay (struct obj_section
*section
)
2940 if (overlay_debugging
&& section
)
2942 bfd
*abfd
= section
->objfile
->obfd
;
2943 asection
*bfd_section
= section
->the_bfd_section
;
2945 if (bfd_section_lma (abfd
, bfd_section
) != 0
2946 && bfd_section_lma (abfd
, bfd_section
)
2947 != bfd_section_vma (abfd
, bfd_section
))
2954 /* Function: overlay_invalidate_all (void)
2955 Invalidate the mapped state of all overlay sections (mark it as stale). */
2958 overlay_invalidate_all (void)
2960 struct objfile
*objfile
;
2961 struct obj_section
*sect
;
2963 ALL_OBJSECTIONS (objfile
, sect
)
2964 if (section_is_overlay (sect
))
2965 sect
->ovly_mapped
= -1;
2968 /* Function: section_is_mapped (SECTION)
2969 Returns true if section is an overlay, and is currently mapped.
2971 Access to the ovly_mapped flag is restricted to this function, so
2972 that we can do automatic update. If the global flag
2973 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2974 overlay_invalidate_all. If the mapped state of the particular
2975 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2978 section_is_mapped (struct obj_section
*osect
)
2980 struct gdbarch
*gdbarch
;
2982 if (osect
== 0 || !section_is_overlay (osect
))
2985 switch (overlay_debugging
)
2989 return 0; /* overlay debugging off */
2990 case ovly_auto
: /* overlay debugging automatic */
2991 /* Unles there is a gdbarch_overlay_update function,
2992 there's really nothing useful to do here (can't really go auto). */
2993 gdbarch
= get_objfile_arch (osect
->objfile
);
2994 if (gdbarch_overlay_update_p (gdbarch
))
2996 if (overlay_cache_invalid
)
2998 overlay_invalidate_all ();
2999 overlay_cache_invalid
= 0;
3001 if (osect
->ovly_mapped
== -1)
3002 gdbarch_overlay_update (gdbarch
, osect
);
3004 /* fall thru to manual case */
3005 case ovly_on
: /* overlay debugging manual */
3006 return osect
->ovly_mapped
== 1;
3010 /* Function: pc_in_unmapped_range
3011 If PC falls into the lma range of SECTION, return true, else false. */
3014 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3016 if (section_is_overlay (section
))
3018 bfd
*abfd
= section
->objfile
->obfd
;
3019 asection
*bfd_section
= section
->the_bfd_section
;
3021 /* We assume the LMA is relocated by the same offset as the VMA. */
3022 bfd_vma size
= bfd_get_section_size (bfd_section
);
3023 CORE_ADDR offset
= obj_section_offset (section
);
3025 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3026 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3033 /* Function: pc_in_mapped_range
3034 If PC falls into the vma range of SECTION, return true, else false. */
3037 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3039 if (section_is_overlay (section
))
3041 if (obj_section_addr (section
) <= pc
3042 && pc
< obj_section_endaddr (section
))
3049 /* Return true if the mapped ranges of sections A and B overlap, false
3053 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3055 CORE_ADDR a_start
= obj_section_addr (a
);
3056 CORE_ADDR a_end
= obj_section_endaddr (a
);
3057 CORE_ADDR b_start
= obj_section_addr (b
);
3058 CORE_ADDR b_end
= obj_section_endaddr (b
);
3060 return (a_start
< b_end
&& b_start
< a_end
);
3063 /* Function: overlay_unmapped_address (PC, SECTION)
3064 Returns the address corresponding to PC in the unmapped (load) range.
3065 May be the same as PC. */
3068 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3070 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3072 bfd
*abfd
= section
->objfile
->obfd
;
3073 asection
*bfd_section
= section
->the_bfd_section
;
3075 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3076 - bfd_section_vma (abfd
, bfd_section
);
3082 /* Function: overlay_mapped_address (PC, SECTION)
3083 Returns the address corresponding to PC in the mapped (runtime) range.
3084 May be the same as PC. */
3087 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3089 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3091 bfd
*abfd
= section
->objfile
->obfd
;
3092 asection
*bfd_section
= section
->the_bfd_section
;
3094 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3095 - bfd_section_lma (abfd
, bfd_section
);
3101 /* Function: symbol_overlayed_address
3102 Return one of two addresses (relative to the VMA or to the LMA),
3103 depending on whether the section is mapped or not. */
3106 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3108 if (overlay_debugging
)
3110 /* If the symbol has no section, just return its regular address. */
3113 /* If the symbol's section is not an overlay, just return its
3115 if (!section_is_overlay (section
))
3117 /* If the symbol's section is mapped, just return its address. */
3118 if (section_is_mapped (section
))
3121 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3122 * then return its LOADED address rather than its vma address!!
3124 return overlay_unmapped_address (address
, section
);
3129 /* Function: find_pc_overlay (PC)
3130 Return the best-match overlay section for PC:
3131 If PC matches a mapped overlay section's VMA, return that section.
3132 Else if PC matches an unmapped section's VMA, return that section.
3133 Else if PC matches an unmapped section's LMA, return that section. */
3135 struct obj_section
*
3136 find_pc_overlay (CORE_ADDR pc
)
3138 struct objfile
*objfile
;
3139 struct obj_section
*osect
, *best_match
= NULL
;
3141 if (overlay_debugging
)
3142 ALL_OBJSECTIONS (objfile
, osect
)
3143 if (section_is_overlay (osect
))
3145 if (pc_in_mapped_range (pc
, osect
))
3147 if (section_is_mapped (osect
))
3152 else if (pc_in_unmapped_range (pc
, osect
))
3158 /* Function: find_pc_mapped_section (PC)
3159 If PC falls into the VMA address range of an overlay section that is
3160 currently marked as MAPPED, return that section. Else return NULL. */
3162 struct obj_section
*
3163 find_pc_mapped_section (CORE_ADDR pc
)
3165 struct objfile
*objfile
;
3166 struct obj_section
*osect
;
3168 if (overlay_debugging
)
3169 ALL_OBJSECTIONS (objfile
, osect
)
3170 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3176 /* Function: list_overlays_command
3177 Print a list of mapped sections and their PC ranges. */
3180 list_overlays_command (char *args
, int from_tty
)
3183 struct objfile
*objfile
;
3184 struct obj_section
*osect
;
3186 if (overlay_debugging
)
3187 ALL_OBJSECTIONS (objfile
, osect
)
3188 if (section_is_mapped (osect
))
3190 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3195 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3196 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3197 size
= bfd_get_section_size (osect
->the_bfd_section
);
3198 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3200 printf_filtered ("Section %s, loaded at ", name
);
3201 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3202 puts_filtered (" - ");
3203 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3204 printf_filtered (", mapped at ");
3205 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3206 puts_filtered (" - ");
3207 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3208 puts_filtered ("\n");
3213 printf_filtered (_("No sections are mapped.\n"));
3216 /* Function: map_overlay_command
3217 Mark the named section as mapped (ie. residing at its VMA address). */
3220 map_overlay_command (char *args
, int from_tty
)
3222 struct objfile
*objfile
, *objfile2
;
3223 struct obj_section
*sec
, *sec2
;
3225 if (!overlay_debugging
)
3226 error (_("Overlay debugging not enabled. Use "
3227 "either the 'overlay auto' or\n"
3228 "the 'overlay manual' command."));
3230 if (args
== 0 || *args
== 0)
3231 error (_("Argument required: name of an overlay section"));
3233 /* First, find a section matching the user supplied argument. */
3234 ALL_OBJSECTIONS (objfile
, sec
)
3235 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3237 /* Now, check to see if the section is an overlay. */
3238 if (!section_is_overlay (sec
))
3239 continue; /* not an overlay section */
3241 /* Mark the overlay as "mapped". */
3242 sec
->ovly_mapped
= 1;
3244 /* Next, make a pass and unmap any sections that are
3245 overlapped by this new section: */
3246 ALL_OBJSECTIONS (objfile2
, sec2
)
3247 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3250 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3251 bfd_section_name (objfile
->obfd
,
3252 sec2
->the_bfd_section
));
3253 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3257 error (_("No overlay section called %s"), args
);
3260 /* Function: unmap_overlay_command
3261 Mark the overlay section as unmapped
3262 (ie. resident in its LMA address range, rather than the VMA range). */
3265 unmap_overlay_command (char *args
, int from_tty
)
3267 struct objfile
*objfile
;
3268 struct obj_section
*sec
;
3270 if (!overlay_debugging
)
3271 error (_("Overlay debugging not enabled. "
3272 "Use either the 'overlay auto' or\n"
3273 "the 'overlay manual' command."));
3275 if (args
== 0 || *args
== 0)
3276 error (_("Argument required: name of an overlay section"));
3278 /* First, find a section matching the user supplied argument. */
3279 ALL_OBJSECTIONS (objfile
, sec
)
3280 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3282 if (!sec
->ovly_mapped
)
3283 error (_("Section %s is not mapped"), args
);
3284 sec
->ovly_mapped
= 0;
3287 error (_("No overlay section called %s"), args
);
3290 /* Function: overlay_auto_command
3291 A utility command to turn on overlay debugging.
3292 Possibly this should be done via a set/show command. */
3295 overlay_auto_command (char *args
, int from_tty
)
3297 overlay_debugging
= ovly_auto
;
3298 enable_overlay_breakpoints ();
3300 printf_unfiltered (_("Automatic overlay debugging enabled."));
3303 /* Function: overlay_manual_command
3304 A utility command to turn on overlay debugging.
3305 Possibly this should be done via a set/show command. */
3308 overlay_manual_command (char *args
, int from_tty
)
3310 overlay_debugging
= ovly_on
;
3311 disable_overlay_breakpoints ();
3313 printf_unfiltered (_("Overlay debugging enabled."));
3316 /* Function: overlay_off_command
3317 A utility command to turn on overlay debugging.
3318 Possibly this should be done via a set/show command. */
3321 overlay_off_command (char *args
, int from_tty
)
3323 overlay_debugging
= ovly_off
;
3324 disable_overlay_breakpoints ();
3326 printf_unfiltered (_("Overlay debugging disabled."));
3330 overlay_load_command (char *args
, int from_tty
)
3332 struct gdbarch
*gdbarch
= get_current_arch ();
3334 if (gdbarch_overlay_update_p (gdbarch
))
3335 gdbarch_overlay_update (gdbarch
, NULL
);
3337 error (_("This target does not know how to read its overlay state."));
3340 /* Function: overlay_command
3341 A place-holder for a mis-typed command. */
3343 /* Command list chain containing all defined "overlay" subcommands. */
3344 static struct cmd_list_element
*overlaylist
;
3347 overlay_command (char *args
, int from_tty
)
3350 ("\"overlay\" must be followed by the name of an overlay command.\n");
3351 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3354 /* Target Overlays for the "Simplest" overlay manager:
3356 This is GDB's default target overlay layer. It works with the
3357 minimal overlay manager supplied as an example by Cygnus. The
3358 entry point is via a function pointer "gdbarch_overlay_update",
3359 so targets that use a different runtime overlay manager can
3360 substitute their own overlay_update function and take over the
3363 The overlay_update function pokes around in the target's data structures
3364 to see what overlays are mapped, and updates GDB's overlay mapping with
3367 In this simple implementation, the target data structures are as follows:
3368 unsigned _novlys; /# number of overlay sections #/
3369 unsigned _ovly_table[_novlys][4] = {
3370 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3371 {..., ..., ..., ...},
3373 unsigned _novly_regions; /# number of overlay regions #/
3374 unsigned _ovly_region_table[_novly_regions][3] = {
3375 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3378 These functions will attempt to update GDB's mappedness state in the
3379 symbol section table, based on the target's mappedness state.
3381 To do this, we keep a cached copy of the target's _ovly_table, and
3382 attempt to detect when the cached copy is invalidated. The main
3383 entry point is "simple_overlay_update(SECT), which looks up SECT in
3384 the cached table and re-reads only the entry for that section from
3385 the target (whenever possible). */
3387 /* Cached, dynamically allocated copies of the target data structures: */
3388 static unsigned (*cache_ovly_table
)[4] = 0;
3389 static unsigned cache_novlys
= 0;
3390 static CORE_ADDR cache_ovly_table_base
= 0;
3393 VMA
, SIZE
, LMA
, MAPPED
3396 /* Throw away the cached copy of _ovly_table. */
3399 simple_free_overlay_table (void)
3401 if (cache_ovly_table
)
3402 xfree (cache_ovly_table
);
3404 cache_ovly_table
= NULL
;
3405 cache_ovly_table_base
= 0;
3408 /* Read an array of ints of size SIZE from the target into a local buffer.
3409 Convert to host order. int LEN is number of ints. */
3412 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3413 int len
, int size
, enum bfd_endian byte_order
)
3415 /* FIXME (alloca): Not safe if array is very large. */
3416 gdb_byte
*buf
= alloca (len
* size
);
3419 read_memory (memaddr
, buf
, len
* size
);
3420 for (i
= 0; i
< len
; i
++)
3421 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3424 /* Find and grab a copy of the target _ovly_table
3425 (and _novlys, which is needed for the table's size). */
3428 simple_read_overlay_table (void)
3430 struct minimal_symbol
*novlys_msym
;
3431 struct bound_minimal_symbol ovly_table_msym
;
3432 struct gdbarch
*gdbarch
;
3434 enum bfd_endian byte_order
;
3436 simple_free_overlay_table ();
3437 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3440 error (_("Error reading inferior's overlay table: "
3441 "couldn't find `_novlys' variable\n"
3442 "in inferior. Use `overlay manual' mode."));
3446 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3447 if (! ovly_table_msym
.minsym
)
3449 error (_("Error reading inferior's overlay table: couldn't find "
3450 "`_ovly_table' array\n"
3451 "in inferior. Use `overlay manual' mode."));
3455 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3456 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3457 byte_order
= gdbarch_byte_order (gdbarch
);
3459 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3462 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3463 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
.minsym
);
3464 read_target_long_array (cache_ovly_table_base
,
3465 (unsigned int *) cache_ovly_table
,
3466 cache_novlys
* 4, word_size
, byte_order
);
3468 return 1; /* SUCCESS */
3471 /* Function: simple_overlay_update_1
3472 A helper function for simple_overlay_update. Assuming a cached copy
3473 of _ovly_table exists, look through it to find an entry whose vma,
3474 lma and size match those of OSECT. Re-read the entry and make sure
3475 it still matches OSECT (else the table may no longer be valid).
3476 Set OSECT's mapped state to match the entry. Return: 1 for
3477 success, 0 for failure. */
3480 simple_overlay_update_1 (struct obj_section
*osect
)
3483 bfd
*obfd
= osect
->objfile
->obfd
;
3484 asection
*bsect
= osect
->the_bfd_section
;
3485 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3486 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3487 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3489 size
= bfd_get_section_size (osect
->the_bfd_section
);
3490 for (i
= 0; i
< cache_novlys
; i
++)
3491 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3492 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3493 /* && cache_ovly_table[i][SIZE] == size */ )
3495 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3496 (unsigned int *) cache_ovly_table
[i
],
3497 4, word_size
, byte_order
);
3498 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3499 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3500 /* && cache_ovly_table[i][SIZE] == size */ )
3502 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3505 else /* Warning! Warning! Target's ovly table has changed! */
3511 /* Function: simple_overlay_update
3512 If OSECT is NULL, then update all sections' mapped state
3513 (after re-reading the entire target _ovly_table).
3514 If OSECT is non-NULL, then try to find a matching entry in the
3515 cached ovly_table and update only OSECT's mapped state.
3516 If a cached entry can't be found or the cache isn't valid, then
3517 re-read the entire cache, and go ahead and update all sections. */
3520 simple_overlay_update (struct obj_section
*osect
)
3522 struct objfile
*objfile
;
3524 /* Were we given an osect to look up? NULL means do all of them. */
3526 /* Have we got a cached copy of the target's overlay table? */
3527 if (cache_ovly_table
!= NULL
)
3529 /* Does its cached location match what's currently in the
3531 struct minimal_symbol
*minsym
3532 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3535 error (_("Error reading inferior's overlay table: couldn't "
3536 "find `_ovly_table' array\n"
3537 "in inferior. Use `overlay manual' mode."));
3539 if (cache_ovly_table_base
== SYMBOL_VALUE_ADDRESS (minsym
))
3540 /* Then go ahead and try to look up this single section in
3542 if (simple_overlay_update_1 (osect
))
3543 /* Found it! We're done. */
3547 /* Cached table no good: need to read the entire table anew.
3548 Or else we want all the sections, in which case it's actually
3549 more efficient to read the whole table in one block anyway. */
3551 if (! simple_read_overlay_table ())
3554 /* Now may as well update all sections, even if only one was requested. */
3555 ALL_OBJSECTIONS (objfile
, osect
)
3556 if (section_is_overlay (osect
))
3559 bfd
*obfd
= osect
->objfile
->obfd
;
3560 asection
*bsect
= osect
->the_bfd_section
;
3562 size
= bfd_get_section_size (bsect
);
3563 for (i
= 0; i
< cache_novlys
; i
++)
3564 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3565 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3566 /* && cache_ovly_table[i][SIZE] == size */ )
3567 { /* obj_section matches i'th entry in ovly_table. */
3568 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3569 break; /* finished with inner for loop: break out. */
3574 /* Set the output sections and output offsets for section SECTP in
3575 ABFD. The relocation code in BFD will read these offsets, so we
3576 need to be sure they're initialized. We map each section to itself,
3577 with no offset; this means that SECTP->vma will be honored. */
3580 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3582 sectp
->output_section
= sectp
;
3583 sectp
->output_offset
= 0;
3586 /* Default implementation for sym_relocate. */
3589 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3592 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3594 bfd
*abfd
= sectp
->owner
;
3596 /* We're only interested in sections with relocation
3598 if ((sectp
->flags
& SEC_RELOC
) == 0)
3601 /* We will handle section offsets properly elsewhere, so relocate as if
3602 all sections begin at 0. */
3603 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3605 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3608 /* Relocate the contents of a debug section SECTP in ABFD. The
3609 contents are stored in BUF if it is non-NULL, or returned in a
3610 malloc'd buffer otherwise.
3612 For some platforms and debug info formats, shared libraries contain
3613 relocations against the debug sections (particularly for DWARF-2;
3614 one affected platform is PowerPC GNU/Linux, although it depends on
3615 the version of the linker in use). Also, ELF object files naturally
3616 have unresolved relocations for their debug sections. We need to apply
3617 the relocations in order to get the locations of symbols correct.
3618 Another example that may require relocation processing, is the
3619 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3623 symfile_relocate_debug_section (struct objfile
*objfile
,
3624 asection
*sectp
, bfd_byte
*buf
)
3626 gdb_assert (objfile
->sf
->sym_relocate
);
3628 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3631 struct symfile_segment_data
*
3632 get_symfile_segment_data (bfd
*abfd
)
3634 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3639 return sf
->sym_segments (abfd
);
3643 free_symfile_segment_data (struct symfile_segment_data
*data
)
3645 xfree (data
->segment_bases
);
3646 xfree (data
->segment_sizes
);
3647 xfree (data
->segment_info
);
3652 - DATA, containing segment addresses from the object file ABFD, and
3653 the mapping from ABFD's sections onto the segments that own them,
3655 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3656 segment addresses reported by the target,
3657 store the appropriate offsets for each section in OFFSETS.
3659 If there are fewer entries in SEGMENT_BASES than there are segments
3660 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3662 If there are more entries, then ignore the extra. The target may
3663 not be able to distinguish between an empty data segment and a
3664 missing data segment; a missing text segment is less plausible. */
3667 symfile_map_offsets_to_segments (bfd
*abfd
,
3668 const struct symfile_segment_data
*data
,
3669 struct section_offsets
*offsets
,
3670 int num_segment_bases
,
3671 const CORE_ADDR
*segment_bases
)
3676 /* It doesn't make sense to call this function unless you have some
3677 segment base addresses. */
3678 gdb_assert (num_segment_bases
> 0);
3680 /* If we do not have segment mappings for the object file, we
3681 can not relocate it by segments. */
3682 gdb_assert (data
!= NULL
);
3683 gdb_assert (data
->num_segments
> 0);
3685 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3687 int which
= data
->segment_info
[i
];
3689 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3691 /* Don't bother computing offsets for sections that aren't
3692 loaded as part of any segment. */
3696 /* Use the last SEGMENT_BASES entry as the address of any extra
3697 segments mentioned in DATA->segment_info. */
3698 if (which
> num_segment_bases
)
3699 which
= num_segment_bases
;
3701 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3702 - data
->segment_bases
[which
- 1]);
3709 symfile_find_segment_sections (struct objfile
*objfile
)
3711 bfd
*abfd
= objfile
->obfd
;
3714 struct symfile_segment_data
*data
;
3716 data
= get_symfile_segment_data (objfile
->obfd
);
3720 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3722 free_symfile_segment_data (data
);
3726 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3728 int which
= data
->segment_info
[i
];
3732 if (objfile
->sect_index_text
== -1)
3733 objfile
->sect_index_text
= sect
->index
;
3735 if (objfile
->sect_index_rodata
== -1)
3736 objfile
->sect_index_rodata
= sect
->index
;
3738 else if (which
== 2)
3740 if (objfile
->sect_index_data
== -1)
3741 objfile
->sect_index_data
= sect
->index
;
3743 if (objfile
->sect_index_bss
== -1)
3744 objfile
->sect_index_bss
= sect
->index
;
3748 free_symfile_segment_data (data
);
3752 _initialize_symfile (void)
3754 struct cmd_list_element
*c
;
3756 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3757 Load symbol table from executable file FILE.\n\
3758 The `file' command can also load symbol tables, as well as setting the file\n\
3759 to execute."), &cmdlist
);
3760 set_cmd_completer (c
, filename_completer
);
3762 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3763 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3764 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3765 ...]\nADDR is the starting address of the file's text.\n\
3766 The optional arguments are section-name section-address pairs and\n\
3767 should be specified if the data and bss segments are not contiguous\n\
3768 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3770 set_cmd_completer (c
, filename_completer
);
3772 c
= add_cmd ("load", class_files
, load_command
, _("\
3773 Dynamically load FILE into the running program, and record its symbols\n\
3774 for access from GDB.\n\
3775 A load OFFSET may also be given."), &cmdlist
);
3776 set_cmd_completer (c
, filename_completer
);
3778 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3779 _("Commands for debugging overlays."), &overlaylist
,
3780 "overlay ", 0, &cmdlist
);
3782 add_com_alias ("ovly", "overlay", class_alias
, 1);
3783 add_com_alias ("ov", "overlay", class_alias
, 1);
3785 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3786 _("Assert that an overlay section is mapped."), &overlaylist
);
3788 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3789 _("Assert that an overlay section is unmapped."), &overlaylist
);
3791 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3792 _("List mappings of overlay sections."), &overlaylist
);
3794 add_cmd ("manual", class_support
, overlay_manual_command
,
3795 _("Enable overlay debugging."), &overlaylist
);
3796 add_cmd ("off", class_support
, overlay_off_command
,
3797 _("Disable overlay debugging."), &overlaylist
);
3798 add_cmd ("auto", class_support
, overlay_auto_command
,
3799 _("Enable automatic overlay debugging."), &overlaylist
);
3800 add_cmd ("load-target", class_support
, overlay_load_command
,
3801 _("Read the overlay mapping state from the target."), &overlaylist
);
3803 /* Filename extension to source language lookup table: */
3804 init_filename_language_table ();
3805 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3807 Set mapping between filename extension and source language."), _("\
3808 Show mapping between filename extension and source language."), _("\
3809 Usage: set extension-language .foo bar"),
3810 set_ext_lang_command
,
3812 &setlist
, &showlist
);
3814 add_info ("extensions", info_ext_lang_command
,
3815 _("All filename extensions associated with a source language."));
3817 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3818 &debug_file_directory
, _("\
3819 Set the directories where separate debug symbols are searched for."), _("\
3820 Show the directories where separate debug symbols are searched for."), _("\
3821 Separate debug symbols are first searched for in the same\n\
3822 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3823 and lastly at the path of the directory of the binary with\n\
3824 each global debug-file-directory component prepended."),
3826 show_debug_file_directory
,
3827 &setlist
, &showlist
);