1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2012 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"
60 #include <sys/types.h>
62 #include "gdb_string.h"
70 int (*deprecated_ui_load_progress_hook
) (const char *section
,
72 void (*deprecated_show_load_progress
) (const char *section
,
73 unsigned long section_sent
,
74 unsigned long section_size
,
75 unsigned long total_sent
,
76 unsigned long total_size
);
77 void (*deprecated_pre_add_symbol_hook
) (const char *);
78 void (*deprecated_post_add_symbol_hook
) (void);
80 static void clear_symtab_users_cleanup (void *ignore
);
82 /* Global variables owned by this file. */
83 int readnow_symbol_files
; /* Read full symbols immediately. */
85 /* External variables and functions referenced. */
87 extern void report_transfer_performance (unsigned long, time_t, time_t);
89 /* Functions this file defines. */
91 static void load_command (char *, int);
93 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
95 static void add_symbol_file_command (char *, int);
97 bfd
*symfile_bfd_open (char *);
99 int get_section_index (struct objfile
*, char *);
101 static const struct sym_fns
*find_sym_fns (bfd
*);
103 static void decrement_reading_symtab (void *);
105 static void overlay_invalidate_all (void);
107 void list_overlays_command (char *, int);
109 void map_overlay_command (char *, int);
111 void unmap_overlay_command (char *, int);
113 static void overlay_auto_command (char *, int);
115 static void overlay_manual_command (char *, int);
117 static void overlay_off_command (char *, int);
119 static void overlay_load_command (char *, int);
121 static void overlay_command (char *, int);
123 static void simple_free_overlay_table (void);
125 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
128 static int simple_read_overlay_table (void);
130 static int simple_overlay_update_1 (struct obj_section
*);
132 static void add_filename_language (char *ext
, enum language lang
);
134 static void info_ext_lang_command (char *args
, int from_tty
);
136 static void init_filename_language_table (void);
138 static void symfile_find_segment_sections (struct objfile
*objfile
);
140 void _initialize_symfile (void);
142 /* List of all available sym_fns. On gdb startup, each object file reader
143 calls add_symtab_fns() to register information on each format it is
146 typedef const struct sym_fns
*sym_fns_ptr
;
147 DEF_VEC_P (sym_fns_ptr
);
149 static VEC (sym_fns_ptr
) *symtab_fns
= NULL
;
151 /* If non-zero, shared library symbols will be added automatically
152 when the inferior is created, new libraries are loaded, or when
153 attaching to the inferior. This is almost always what users will
154 want to have happen; but for very large programs, the startup time
155 will be excessive, and so if this is a problem, the user can clear
156 this flag and then add the shared library symbols as needed. Note
157 that there is a potential for confusion, since if the shared
158 library symbols are not loaded, commands like "info fun" will *not*
159 report all the functions that are actually present. */
161 int auto_solib_add
= 1;
164 /* Make a null terminated copy of the string at PTR with SIZE characters in
165 the obstack pointed to by OBSTACKP . Returns the address of the copy.
166 Note that the string at PTR does not have to be null terminated, I.e. it
167 may be part of a larger string and we are only saving a substring. */
170 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
172 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
173 /* Open-coded memcpy--saves function call time. These strings are usually
174 short. FIXME: Is this really still true with a compiler that can
177 const char *p1
= ptr
;
179 const char *end
= ptr
+ size
;
188 /* Concatenate NULL terminated variable argument list of `const char *'
189 strings; return the new string. Space is found in the OBSTACKP.
190 Argument list must be terminated by a sentinel expression `(char *)
194 obconcat (struct obstack
*obstackp
, ...)
198 va_start (ap
, obstackp
);
201 const char *s
= va_arg (ap
, const char *);
206 obstack_grow_str (obstackp
, s
);
209 obstack_1grow (obstackp
, 0);
211 return obstack_finish (obstackp
);
214 /* True if we are reading a symbol table. */
216 int currently_reading_symtab
= 0;
219 decrement_reading_symtab (void *dummy
)
221 currently_reading_symtab
--;
224 /* Increment currently_reading_symtab and return a cleanup that can be
225 used to decrement it. */
227 increment_reading_symtab (void)
229 ++currently_reading_symtab
;
230 return make_cleanup (decrement_reading_symtab
, NULL
);
233 /* Remember the lowest-addressed loadable section we've seen.
234 This function is called via bfd_map_over_sections.
236 In case of equal vmas, the section with the largest size becomes the
237 lowest-addressed loadable section.
239 If the vmas and sizes are equal, the last section is considered the
240 lowest-addressed loadable section. */
243 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
245 asection
**lowest
= (asection
**) obj
;
247 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
250 *lowest
= sect
; /* First loadable section */
251 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
252 *lowest
= sect
; /* A lower loadable section */
253 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
254 && (bfd_section_size (abfd
, (*lowest
))
255 <= bfd_section_size (abfd
, sect
)))
259 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
261 struct section_addr_info
*
262 alloc_section_addr_info (size_t num_sections
)
264 struct section_addr_info
*sap
;
267 size
= (sizeof (struct section_addr_info
)
268 + sizeof (struct other_sections
) * (num_sections
- 1));
269 sap
= (struct section_addr_info
*) xmalloc (size
);
270 memset (sap
, 0, size
);
271 sap
->num_sections
= num_sections
;
276 /* Build (allocate and populate) a section_addr_info struct from
277 an existing section table. */
279 extern struct section_addr_info
*
280 build_section_addr_info_from_section_table (const struct target_section
*start
,
281 const struct target_section
*end
)
283 struct section_addr_info
*sap
;
284 const struct target_section
*stp
;
287 sap
= alloc_section_addr_info (end
- start
);
289 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
291 if (bfd_get_section_flags (stp
->bfd
,
292 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
293 && oidx
< end
- start
)
295 sap
->other
[oidx
].addr
= stp
->addr
;
296 sap
->other
[oidx
].name
297 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
298 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
306 /* Create a section_addr_info from section offsets in ABFD. */
308 static struct section_addr_info
*
309 build_section_addr_info_from_bfd (bfd
*abfd
)
311 struct section_addr_info
*sap
;
313 struct bfd_section
*sec
;
315 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
316 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
317 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
319 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
320 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
321 sap
->other
[i
].sectindex
= sec
->index
;
327 /* Create a section_addr_info from section offsets in OBJFILE. */
329 struct section_addr_info
*
330 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
332 struct section_addr_info
*sap
;
335 /* Before reread_symbols gets rewritten it is not safe to call:
336 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
338 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
339 for (i
= 0; i
< sap
->num_sections
&& sap
->other
[i
].name
; i
++)
341 int sectindex
= sap
->other
[i
].sectindex
;
343 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
348 /* Free all memory allocated by build_section_addr_info_from_section_table. */
351 free_section_addr_info (struct section_addr_info
*sap
)
355 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
356 if (sap
->other
[idx
].name
)
357 xfree (sap
->other
[idx
].name
);
362 /* Initialize OBJFILE's sect_index_* members. */
364 init_objfile_sect_indices (struct objfile
*objfile
)
369 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
371 objfile
->sect_index_text
= sect
->index
;
373 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
375 objfile
->sect_index_data
= sect
->index
;
377 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
379 objfile
->sect_index_bss
= sect
->index
;
381 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
383 objfile
->sect_index_rodata
= sect
->index
;
385 /* This is where things get really weird... We MUST have valid
386 indices for the various sect_index_* members or gdb will abort.
387 So if for example, there is no ".text" section, we have to
388 accomodate that. First, check for a file with the standard
389 one or two segments. */
391 symfile_find_segment_sections (objfile
);
393 /* Except when explicitly adding symbol files at some address,
394 section_offsets contains nothing but zeros, so it doesn't matter
395 which slot in section_offsets the individual sect_index_* members
396 index into. So if they are all zero, it is safe to just point
397 all the currently uninitialized indices to the first slot. But
398 beware: if this is the main executable, it may be relocated
399 later, e.g. by the remote qOffsets packet, and then this will
400 be wrong! That's why we try segments first. */
402 for (i
= 0; i
< objfile
->num_sections
; i
++)
404 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
409 if (i
== objfile
->num_sections
)
411 if (objfile
->sect_index_text
== -1)
412 objfile
->sect_index_text
= 0;
413 if (objfile
->sect_index_data
== -1)
414 objfile
->sect_index_data
= 0;
415 if (objfile
->sect_index_bss
== -1)
416 objfile
->sect_index_bss
= 0;
417 if (objfile
->sect_index_rodata
== -1)
418 objfile
->sect_index_rodata
= 0;
422 /* The arguments to place_section. */
424 struct place_section_arg
426 struct section_offsets
*offsets
;
430 /* Find a unique offset to use for loadable section SECT if
431 the user did not provide an offset. */
434 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
436 struct place_section_arg
*arg
= obj
;
437 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
439 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
441 /* We are only interested in allocated sections. */
442 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
445 /* If the user specified an offset, honor it. */
446 if (offsets
[sect
->index
] != 0)
449 /* Otherwise, let's try to find a place for the section. */
450 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
457 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
459 int indx
= cur_sec
->index
;
461 /* We don't need to compare against ourself. */
465 /* We can only conflict with allocated sections. */
466 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
469 /* If the section offset is 0, either the section has not been placed
470 yet, or it was the lowest section placed (in which case LOWEST
471 will be past its end). */
472 if (offsets
[indx
] == 0)
475 /* If this section would overlap us, then we must move up. */
476 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
477 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
479 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
480 start_addr
= (start_addr
+ align
- 1) & -align
;
485 /* Otherwise, we appear to be OK. So far. */
490 offsets
[sect
->index
] = start_addr
;
491 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
494 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
495 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
499 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
501 struct section_addr_info
*addrs
)
505 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
507 /* Now calculate offsets for section that were specified by the caller. */
508 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
510 struct other_sections
*osp
;
512 osp
= &addrs
->other
[i
];
513 if (osp
->sectindex
== -1)
516 /* Record all sections in offsets. */
517 /* The section_offsets in the objfile are here filled in using
519 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
523 /* Transform section name S for a name comparison. prelink can split section
524 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
525 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
526 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
527 (`.sbss') section has invalid (increased) virtual address. */
530 addr_section_name (const char *s
)
532 if (strcmp (s
, ".dynbss") == 0)
534 if (strcmp (s
, ".sdynbss") == 0)
540 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
541 their (name, sectindex) pair. sectindex makes the sort by name stable. */
544 addrs_section_compar (const void *ap
, const void *bp
)
546 const struct other_sections
*a
= *((struct other_sections
**) ap
);
547 const struct other_sections
*b
= *((struct other_sections
**) bp
);
550 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
554 return a
->sectindex
- b
->sectindex
;
557 /* Provide sorted array of pointers to sections of ADDRS. The array is
558 terminated by NULL. Caller is responsible to call xfree for it. */
560 static struct other_sections
**
561 addrs_section_sort (struct section_addr_info
*addrs
)
563 struct other_sections
**array
;
566 /* `+ 1' for the NULL terminator. */
567 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
568 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
569 array
[i
] = &addrs
->other
[i
];
572 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
577 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
578 also SECTINDEXes specific to ABFD there. This function can be used to
579 rebase ADDRS to start referencing different BFD than before. */
582 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
584 asection
*lower_sect
;
585 CORE_ADDR lower_offset
;
587 struct cleanup
*my_cleanup
;
588 struct section_addr_info
*abfd_addrs
;
589 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
590 struct other_sections
**addrs_to_abfd_addrs
;
592 /* Find lowest loadable section to be used as starting point for
593 continguous sections. */
595 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
596 if (lower_sect
== NULL
)
598 warning (_("no loadable sections found in added symbol-file %s"),
599 bfd_get_filename (abfd
));
603 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
605 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
606 in ABFD. Section names are not unique - there can be multiple sections of
607 the same name. Also the sections of the same name do not have to be
608 adjacent to each other. Some sections may be present only in one of the
609 files. Even sections present in both files do not have to be in the same
612 Use stable sort by name for the sections in both files. Then linearly
613 scan both lists matching as most of the entries as possible. */
615 addrs_sorted
= addrs_section_sort (addrs
);
616 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
618 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
619 make_cleanup_free_section_addr_info (abfd_addrs
);
620 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
621 make_cleanup (xfree
, abfd_addrs_sorted
);
623 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
624 ABFD_ADDRS_SORTED. */
626 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
627 * addrs
->num_sections
);
628 make_cleanup (xfree
, addrs_to_abfd_addrs
);
630 while (*addrs_sorted
)
632 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
634 while (*abfd_addrs_sorted
635 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
639 if (*abfd_addrs_sorted
640 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
645 /* Make the found item directly addressable from ADDRS. */
646 index_in_addrs
= *addrs_sorted
- addrs
->other
;
647 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
648 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
650 /* Never use the same ABFD entry twice. */
657 /* Calculate offsets for the loadable sections.
658 FIXME! Sections must be in order of increasing loadable section
659 so that contiguous sections can use the lower-offset!!!
661 Adjust offsets if the segments are not contiguous.
662 If the section is contiguous, its offset should be set to
663 the offset of the highest loadable section lower than it
664 (the loadable section directly below it in memory).
665 this_offset = lower_offset = lower_addr - lower_orig_addr */
667 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
669 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
673 /* This is the index used by BFD. */
674 addrs
->other
[i
].sectindex
= sect
->sectindex
;
676 if (addrs
->other
[i
].addr
!= 0)
678 addrs
->other
[i
].addr
-= sect
->addr
;
679 lower_offset
= addrs
->other
[i
].addr
;
682 addrs
->other
[i
].addr
= lower_offset
;
686 /* addr_section_name transformation is not used for SECT_NAME. */
687 const char *sect_name
= addrs
->other
[i
].name
;
689 /* This section does not exist in ABFD, which is normally
690 unexpected and we want to issue a warning.
692 However, the ELF prelinker does create a few sections which are
693 marked in the main executable as loadable (they are loaded in
694 memory from the DYNAMIC segment) and yet are not present in
695 separate debug info files. This is fine, and should not cause
696 a warning. Shared libraries contain just the section
697 ".gnu.liblist" but it is not marked as loadable there. There is
698 no other way to identify them than by their name as the sections
699 created by prelink have no special flags.
701 For the sections `.bss' and `.sbss' see addr_section_name. */
703 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
704 || strcmp (sect_name
, ".gnu.conflict") == 0
705 || (strcmp (sect_name
, ".bss") == 0
707 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
708 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
709 || (strcmp (sect_name
, ".sbss") == 0
711 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
712 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
713 warning (_("section %s not found in %s"), sect_name
,
714 bfd_get_filename (abfd
));
716 addrs
->other
[i
].addr
= 0;
717 addrs
->other
[i
].sectindex
= -1;
721 do_cleanups (my_cleanup
);
724 /* Parse the user's idea of an offset for dynamic linking, into our idea
725 of how to represent it for fast symbol reading. This is the default
726 version of the sym_fns.sym_offsets function for symbol readers that
727 don't need to do anything special. It allocates a section_offsets table
728 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
731 default_symfile_offsets (struct objfile
*objfile
,
732 struct section_addr_info
*addrs
)
734 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
735 objfile
->section_offsets
= (struct section_offsets
*)
736 obstack_alloc (&objfile
->objfile_obstack
,
737 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
738 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
739 objfile
->num_sections
, addrs
);
741 /* For relocatable files, all loadable sections will start at zero.
742 The zero is meaningless, so try to pick arbitrary addresses such
743 that no loadable sections overlap. This algorithm is quadratic,
744 but the number of sections in a single object file is generally
746 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
748 struct place_section_arg arg
;
749 bfd
*abfd
= objfile
->obfd
;
752 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
753 /* We do not expect this to happen; just skip this step if the
754 relocatable file has a section with an assigned VMA. */
755 if (bfd_section_vma (abfd
, cur_sec
) != 0)
760 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
762 /* Pick non-overlapping offsets for sections the user did not
764 arg
.offsets
= objfile
->section_offsets
;
766 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
768 /* Correctly filling in the section offsets is not quite
769 enough. Relocatable files have two properties that
770 (most) shared objects do not:
772 - Their debug information will contain relocations. Some
773 shared libraries do also, but many do not, so this can not
776 - If there are multiple code sections they will be loaded
777 at different relative addresses in memory than they are
778 in the objfile, since all sections in the file will start
781 Because GDB has very limited ability to map from an
782 address in debug info to the correct code section,
783 it relies on adding SECT_OFF_TEXT to things which might be
784 code. If we clear all the section offsets, and set the
785 section VMAs instead, then symfile_relocate_debug_section
786 will return meaningful debug information pointing at the
789 GDB has too many different data structures for section
790 addresses - a bfd, objfile, and so_list all have section
791 tables, as does exec_ops. Some of these could probably
794 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
795 cur_sec
= cur_sec
->next
)
797 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
800 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
801 exec_set_section_address (bfd_get_filename (abfd
),
803 offsets
[cur_sec
->index
]);
804 offsets
[cur_sec
->index
] = 0;
809 /* Remember the bfd indexes for the .text, .data, .bss and
811 init_objfile_sect_indices (objfile
);
815 /* Divide the file into segments, which are individual relocatable units.
816 This is the default version of the sym_fns.sym_segments function for
817 symbol readers that do not have an explicit representation of segments.
818 It assumes that object files do not have segments, and fully linked
819 files have a single segment. */
821 struct symfile_segment_data
*
822 default_symfile_segments (bfd
*abfd
)
826 struct symfile_segment_data
*data
;
829 /* Relocatable files contain enough information to position each
830 loadable section independently; they should not be relocated
832 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
835 /* Make sure there is at least one loadable section in the file. */
836 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
838 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
846 low
= bfd_get_section_vma (abfd
, sect
);
847 high
= low
+ bfd_get_section_size (sect
);
849 data
= XZALLOC (struct symfile_segment_data
);
850 data
->num_segments
= 1;
851 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
852 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
854 num_sections
= bfd_count_sections (abfd
);
855 data
->segment_info
= XCALLOC (num_sections
, int);
857 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
861 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
864 vma
= bfd_get_section_vma (abfd
, sect
);
867 if (vma
+ bfd_get_section_size (sect
) > high
)
868 high
= vma
+ bfd_get_section_size (sect
);
870 data
->segment_info
[i
] = 1;
873 data
->segment_bases
[0] = low
;
874 data
->segment_sizes
[0] = high
- low
;
879 /* Process a symbol file, as either the main file or as a dynamically
882 OBJFILE is where the symbols are to be read from.
884 ADDRS is the list of section load addresses. If the user has given
885 an 'add-symbol-file' command, then this is the list of offsets and
886 addresses he or she provided as arguments to the command; or, if
887 we're handling a shared library, these are the actual addresses the
888 sections are loaded at, according to the inferior's dynamic linker
889 (as gleaned by GDB's shared library code). We convert each address
890 into an offset from the section VMA's as it appears in the object
891 file, and then call the file's sym_offsets function to convert this
892 into a format-specific offset table --- a `struct section_offsets'.
893 If ADDRS is non-zero, OFFSETS must be zero.
895 OFFSETS is a table of section offsets already in the right
896 format-specific representation. NUM_OFFSETS is the number of
897 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
898 assume this is the proper table the call to sym_offsets described
899 above would produce. Instead of calling sym_offsets, we just dump
900 it right into objfile->section_offsets. (When we're re-reading
901 symbols from an objfile, we don't have the original load address
902 list any more; all we have is the section offset table.) If
903 OFFSETS is non-zero, ADDRS must be zero.
905 ADD_FLAGS encodes verbosity level, whether this is main symbol or
906 an extra symbol file such as dynamically loaded code, and wether
907 breakpoint reset should be deferred. */
910 syms_from_objfile (struct objfile
*objfile
,
911 struct section_addr_info
*addrs
,
912 struct section_offsets
*offsets
,
916 struct section_addr_info
*local_addr
= NULL
;
917 struct cleanup
*old_chain
;
918 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
920 gdb_assert (! (addrs
&& offsets
));
922 init_entry_point_info (objfile
);
923 objfile
->sf
= find_sym_fns (objfile
->obfd
);
925 if (objfile
->sf
== NULL
)
926 return; /* No symbols. */
928 /* Make sure that partially constructed symbol tables will be cleaned up
929 if an error occurs during symbol reading. */
930 old_chain
= make_cleanup_free_objfile (objfile
);
932 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
933 list. We now establish the convention that an addr of zero means
934 no load address was specified. */
935 if (! addrs
&& ! offsets
)
938 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
939 make_cleanup (xfree
, local_addr
);
943 /* Now either addrs or offsets is non-zero. */
947 /* We will modify the main symbol table, make sure that all its users
948 will be cleaned up if an error occurs during symbol reading. */
949 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
951 /* Since no error yet, throw away the old symbol table. */
953 if (symfile_objfile
!= NULL
)
955 free_objfile (symfile_objfile
);
956 gdb_assert (symfile_objfile
== NULL
);
959 /* Currently we keep symbols from the add-symbol-file command.
960 If the user wants to get rid of them, they should do "symbol-file"
961 without arguments first. Not sure this is the best behavior
964 (*objfile
->sf
->sym_new_init
) (objfile
);
967 /* Convert addr into an offset rather than an absolute address.
968 We find the lowest address of a loaded segment in the objfile,
969 and assume that <addr> is where that got loaded.
971 We no longer warn if the lowest section is not a text segment (as
972 happens for the PA64 port. */
973 if (addrs
&& addrs
->other
[0].name
)
974 addr_info_make_relative (addrs
, objfile
->obfd
);
976 /* Initialize symbol reading routines for this objfile, allow complaints to
977 appear for this new file, and record how verbose to be, then do the
978 initial symbol reading for this file. */
980 (*objfile
->sf
->sym_init
) (objfile
);
981 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
984 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
987 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
989 /* Just copy in the offset table directly as given to us. */
990 objfile
->num_sections
= num_offsets
;
991 objfile
->section_offsets
992 = ((struct section_offsets
*)
993 obstack_alloc (&objfile
->objfile_obstack
, size
));
994 memcpy (objfile
->section_offsets
, offsets
, size
);
996 init_objfile_sect_indices (objfile
);
999 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
1001 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1002 require_partial_symbols (objfile
, 0);
1004 /* Discard cleanups as symbol reading was successful. */
1006 discard_cleanups (old_chain
);
1010 /* Perform required actions after either reading in the initial
1011 symbols for a new objfile, or mapping in the symbols from a reusable
1012 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1015 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1017 /* If this is the main symbol file we have to clean up all users of the
1018 old main symbol file. Otherwise it is sufficient to fixup all the
1019 breakpoints that may have been redefined by this symbol file. */
1020 if (add_flags
& SYMFILE_MAINLINE
)
1022 /* OK, make it the "real" symbol file. */
1023 symfile_objfile
= objfile
;
1025 clear_symtab_users (add_flags
);
1027 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1029 breakpoint_re_set ();
1032 /* We're done reading the symbol file; finish off complaints. */
1033 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1036 /* Process a symbol file, as either the main file or as a dynamically
1039 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1040 This BFD will be closed on error, and is always consumed by this function.
1042 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1043 extra, such as dynamically loaded code, and what to do with breakpoins.
1045 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1046 syms_from_objfile, above.
1047 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1049 PARENT is the original objfile if ABFD is a separate debug info file.
1050 Otherwise PARENT is NULL.
1052 Upon success, returns a pointer to the objfile that was added.
1053 Upon failure, jumps back to command level (never returns). */
1055 static struct objfile
*
1056 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1058 struct section_addr_info
*addrs
,
1059 struct section_offsets
*offsets
,
1061 int flags
, struct objfile
*parent
)
1063 struct objfile
*objfile
;
1064 struct cleanup
*my_cleanups
;
1065 const char *name
= bfd_get_filename (abfd
);
1066 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1067 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1068 const int should_print
= ((from_tty
|| info_verbose
)
1069 && (readnow_symbol_files
1070 || (add_flags
& SYMFILE_NO_READ
) == 0));
1072 if (readnow_symbol_files
)
1074 flags
|= OBJF_READNOW
;
1075 add_flags
&= ~SYMFILE_NO_READ
;
1078 my_cleanups
= make_cleanup_bfd_unref (abfd
);
1080 /* Give user a chance to burp if we'd be
1081 interactively wiping out any existing symbols. */
1083 if ((have_full_symbols () || have_partial_symbols ())
1086 && !query (_("Load new symbol table from \"%s\"? "), name
))
1087 error (_("Not confirmed."));
1089 objfile
= allocate_objfile (abfd
, flags
| (mainline
? OBJF_MAINLINE
: 0));
1090 discard_cleanups (my_cleanups
);
1093 add_separate_debug_objfile (objfile
, parent
);
1095 /* We either created a new mapped symbol table, mapped an existing
1096 symbol table file which has not had initial symbol reading
1097 performed, or need to read an unmapped symbol table. */
1100 if (deprecated_pre_add_symbol_hook
)
1101 deprecated_pre_add_symbol_hook (name
);
1104 printf_unfiltered (_("Reading symbols from %s..."), name
);
1106 gdb_flush (gdb_stdout
);
1109 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1112 /* We now have at least a partial symbol table. Check to see if the
1113 user requested that all symbols be read on initial access via either
1114 the gdb startup command line or on a per symbol file basis. Expand
1115 all partial symbol tables for this objfile if so. */
1117 if ((flags
& OBJF_READNOW
))
1121 printf_unfiltered (_("expanding to full symbols..."));
1123 gdb_flush (gdb_stdout
);
1127 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1130 if (should_print
&& !objfile_has_symbols (objfile
))
1133 printf_unfiltered (_("(no debugging symbols found)..."));
1139 if (deprecated_post_add_symbol_hook
)
1140 deprecated_post_add_symbol_hook ();
1142 printf_unfiltered (_("done.\n"));
1145 /* We print some messages regardless of whether 'from_tty ||
1146 info_verbose' is true, so make sure they go out at the right
1148 gdb_flush (gdb_stdout
);
1150 if (objfile
->sf
== NULL
)
1152 observer_notify_new_objfile (objfile
);
1153 return objfile
; /* No symbols. */
1156 new_symfile_objfile (objfile
, add_flags
);
1158 observer_notify_new_objfile (objfile
);
1160 bfd_cache_close_all ();
1164 /* Add BFD as a separate debug file for OBJFILE. */
1167 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1169 struct objfile
*new_objfile
;
1170 struct section_addr_info
*sap
;
1171 struct cleanup
*my_cleanup
;
1173 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1174 because sections of BFD may not match sections of OBJFILE and because
1175 vma may have been modified by tools such as prelink. */
1176 sap
= build_section_addr_info_from_objfile (objfile
);
1177 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1179 new_objfile
= symbol_file_add_with_addrs_or_offsets
1180 (bfd
, symfile_flags
,
1182 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1186 do_cleanups (my_cleanup
);
1189 /* Process the symbol file ABFD, as either the main file or as a
1190 dynamically loaded file.
1192 See symbol_file_add_with_addrs_or_offsets's comments for
1195 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1196 struct section_addr_info
*addrs
,
1197 int flags
, struct objfile
*parent
)
1199 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1204 /* Process a symbol file, as either the main file or as a dynamically
1205 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1208 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1211 return symbol_file_add_from_bfd (symfile_bfd_open (name
), add_flags
, addrs
,
1216 /* Call symbol_file_add() with default values and update whatever is
1217 affected by the loading of a new main().
1218 Used when the file is supplied in the gdb command line
1219 and by some targets with special loading requirements.
1220 The auxiliary function, symbol_file_add_main_1(), has the flags
1221 argument for the switches that can only be specified in the symbol_file
1225 symbol_file_add_main (char *args
, int from_tty
)
1227 symbol_file_add_main_1 (args
, from_tty
, 0);
1231 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1233 const int add_flags
= (current_inferior ()->symfile_flags
1234 | SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0));
1236 symbol_file_add (args
, add_flags
, NULL
, flags
);
1238 /* Getting new symbols may change our opinion about
1239 what is frameless. */
1240 reinit_frame_cache ();
1242 if ((flags
& SYMFILE_NO_READ
) == 0)
1243 set_initial_language ();
1247 symbol_file_clear (int from_tty
)
1249 if ((have_full_symbols () || have_partial_symbols ())
1252 ? !query (_("Discard symbol table from `%s'? "),
1253 symfile_objfile
->name
)
1254 : !query (_("Discard symbol table? "))))
1255 error (_("Not confirmed."));
1257 /* solib descriptors may have handles to objfiles. Wipe them before their
1258 objfiles get stale by free_all_objfiles. */
1259 no_shared_libraries (NULL
, from_tty
);
1261 free_all_objfiles ();
1263 gdb_assert (symfile_objfile
== NULL
);
1265 printf_unfiltered (_("No symbol file now.\n"));
1269 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1272 bfd_size_type debuglink_size
;
1273 unsigned long crc32
;
1277 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1282 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1284 contents
= xmalloc (debuglink_size
);
1285 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1286 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1288 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1289 crc_offset
= strlen (contents
) + 1;
1290 crc_offset
= (crc_offset
+ 3) & ~3;
1292 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1298 /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and
1299 return 1. Otherwise print a warning and return 0. ABFD seek position is
1303 get_file_crc (bfd
*abfd
, unsigned long *file_crc_return
)
1305 unsigned long file_crc
= 0;
1307 if (bfd_seek (abfd
, 0, SEEK_SET
) != 0)
1309 warning (_("Problem reading \"%s\" for CRC: %s"),
1310 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1316 gdb_byte buffer
[8 * 1024];
1317 bfd_size_type count
;
1319 count
= bfd_bread (buffer
, sizeof (buffer
), abfd
);
1320 if (count
== (bfd_size_type
) -1)
1322 warning (_("Problem reading \"%s\" for CRC: %s"),
1323 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1328 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1331 *file_crc_return
= file_crc
;
1336 separate_debug_file_exists (const char *name
, unsigned long crc
,
1337 struct objfile
*parent_objfile
)
1339 unsigned long file_crc
;
1342 struct stat parent_stat
, abfd_stat
;
1343 int verified_as_different
;
1345 /* Find a separate debug info file as if symbols would be present in
1346 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1347 section can contain just the basename of PARENT_OBJFILE without any
1348 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1349 the separate debug infos with the same basename can exist. */
1351 if (filename_cmp (name
, parent_objfile
->name
) == 0)
1354 abfd
= bfd_open_maybe_remote (name
);
1359 /* Verify symlinks were not the cause of filename_cmp name difference above.
1361 Some operating systems, e.g. Windows, do not provide a meaningful
1362 st_ino; they always set it to zero. (Windows does provide a
1363 meaningful st_dev.) Do not indicate a duplicate library in that
1364 case. While there is no guarantee that a system that provides
1365 meaningful inode numbers will never set st_ino to zero, this is
1366 merely an optimization, so we do not need to worry about false
1369 if (bfd_stat (abfd
, &abfd_stat
) == 0
1370 && abfd_stat
.st_ino
!= 0
1371 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1373 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1374 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1376 gdb_bfd_unref (abfd
);
1379 verified_as_different
= 1;
1382 verified_as_different
= 0;
1384 file_crc_p
= get_file_crc (abfd
, &file_crc
);
1386 gdb_bfd_unref (abfd
);
1391 if (crc
!= file_crc
)
1393 /* If one (or both) the files are accessed for example the via "remote:"
1394 gdbserver way it does not support the bfd_stat operation. Verify
1395 whether those two files are not the same manually. */
1397 if (!verified_as_different
&& !parent_objfile
->crc32_p
)
1399 parent_objfile
->crc32_p
= get_file_crc (parent_objfile
->obfd
,
1400 &parent_objfile
->crc32
);
1401 if (!parent_objfile
->crc32_p
)
1405 if (verified_as_different
|| parent_objfile
->crc32
!= file_crc
)
1406 warning (_("the debug information found in \"%s\""
1407 " does not match \"%s\" (CRC mismatch).\n"),
1408 name
, parent_objfile
->name
);
1416 char *debug_file_directory
= NULL
;
1418 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1419 struct cmd_list_element
*c
, const char *value
)
1421 fprintf_filtered (file
,
1422 _("The directory where separate debug "
1423 "symbols are searched for is \"%s\".\n"),
1427 #if ! defined (DEBUG_SUBDIRECTORY)
1428 #define DEBUG_SUBDIRECTORY ".debug"
1431 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1432 where the original file resides (may not be the same as
1433 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1434 looking for. Returns the name of the debuginfo, of NULL. */
1437 find_separate_debug_file (const char *dir
,
1438 const char *canon_dir
,
1439 const char *debuglink
,
1440 unsigned long crc32
, struct objfile
*objfile
)
1445 VEC (char_ptr
) *debugdir_vec
;
1446 struct cleanup
*back_to
;
1449 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1451 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1452 i
= strlen (canon_dir
);
1454 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1456 + strlen (DEBUG_SUBDIRECTORY
)
1458 + strlen (debuglink
)
1461 /* First try in the same directory as the original file. */
1462 strcpy (debugfile
, dir
);
1463 strcat (debugfile
, debuglink
);
1465 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1468 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1469 strcpy (debugfile
, dir
);
1470 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1471 strcat (debugfile
, "/");
1472 strcat (debugfile
, debuglink
);
1474 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1477 /* Then try in the global debugfile directories.
1479 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1480 cause "/..." lookups. */
1482 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1483 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1485 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1487 strcpy (debugfile
, debugdir
);
1488 strcat (debugfile
, "/");
1489 strcat (debugfile
, dir
);
1490 strcat (debugfile
, debuglink
);
1492 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1495 /* If the file is in the sysroot, try using its base path in the
1496 global debugfile directory. */
1497 if (canon_dir
!= NULL
1498 && filename_ncmp (canon_dir
, gdb_sysroot
,
1499 strlen (gdb_sysroot
)) == 0
1500 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1502 strcpy (debugfile
, debugdir
);
1503 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1504 strcat (debugfile
, "/");
1505 strcat (debugfile
, debuglink
);
1507 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1512 do_cleanups (back_to
);
1517 /* Modify PATH to contain only "directory/" part of PATH.
1518 If there were no directory separators in PATH, PATH will be empty
1519 string on return. */
1522 terminate_after_last_dir_separator (char *path
)
1526 /* Strip off the final filename part, leaving the directory name,
1527 followed by a slash. The directory can be relative or absolute. */
1528 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1529 if (IS_DIR_SEPARATOR (path
[i
]))
1532 /* If I is -1 then no directory is present there and DIR will be "". */
1536 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1537 Returns pathname, or NULL. */
1540 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1543 char *dir
, *canon_dir
;
1545 unsigned long crc32
;
1546 struct cleanup
*cleanups
;
1548 debuglink
= get_debug_link_info (objfile
, &crc32
);
1550 if (debuglink
== NULL
)
1552 /* There's no separate debug info, hence there's no way we could
1553 load it => no warning. */
1557 cleanups
= make_cleanup (xfree
, debuglink
);
1558 dir
= xstrdup (objfile
->name
);
1559 make_cleanup (xfree
, dir
);
1560 terminate_after_last_dir_separator (dir
);
1561 canon_dir
= lrealpath (dir
);
1563 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1567 if (debugfile
== NULL
)
1570 /* For PR gdb/9538, try again with realpath (if different from the
1575 if (lstat (objfile
->name
, &st_buf
) == 0 && S_ISLNK(st_buf
.st_mode
))
1579 symlink_dir
= lrealpath (objfile
->name
);
1580 if (symlink_dir
!= NULL
)
1582 make_cleanup (xfree
, symlink_dir
);
1583 terminate_after_last_dir_separator (symlink_dir
);
1584 if (strcmp (dir
, symlink_dir
) != 0)
1586 /* Different directory, so try using it. */
1587 debugfile
= find_separate_debug_file (symlink_dir
,
1595 #endif /* HAVE_LSTAT */
1598 do_cleanups (cleanups
);
1603 /* This is the symbol-file command. Read the file, analyze its
1604 symbols, and add a struct symtab to a symtab list. The syntax of
1605 the command is rather bizarre:
1607 1. The function buildargv implements various quoting conventions
1608 which are undocumented and have little or nothing in common with
1609 the way things are quoted (or not quoted) elsewhere in GDB.
1611 2. Options are used, which are not generally used in GDB (perhaps
1612 "set mapped on", "set readnow on" would be better)
1614 3. The order of options matters, which is contrary to GNU
1615 conventions (because it is confusing and inconvenient). */
1618 symbol_file_command (char *args
, int from_tty
)
1624 symbol_file_clear (from_tty
);
1628 char **argv
= gdb_buildargv (args
);
1629 int flags
= OBJF_USERLOADED
;
1630 struct cleanup
*cleanups
;
1633 cleanups
= make_cleanup_freeargv (argv
);
1634 while (*argv
!= NULL
)
1636 if (strcmp (*argv
, "-readnow") == 0)
1637 flags
|= OBJF_READNOW
;
1638 else if (**argv
== '-')
1639 error (_("unknown option `%s'"), *argv
);
1642 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1650 error (_("no symbol file name was specified"));
1652 do_cleanups (cleanups
);
1656 /* Set the initial language.
1658 FIXME: A better solution would be to record the language in the
1659 psymtab when reading partial symbols, and then use it (if known) to
1660 set the language. This would be a win for formats that encode the
1661 language in an easily discoverable place, such as DWARF. For
1662 stabs, we can jump through hoops looking for specially named
1663 symbols or try to intuit the language from the specific type of
1664 stabs we find, but we can't do that until later when we read in
1668 set_initial_language (void)
1670 enum language lang
= language_unknown
;
1672 if (language_of_main
!= language_unknown
)
1673 lang
= language_of_main
;
1676 const char *filename
;
1678 filename
= find_main_filename ();
1679 if (filename
!= NULL
)
1680 lang
= deduce_language_from_filename (filename
);
1683 if (lang
== language_unknown
)
1685 /* Make C the default language */
1689 set_language (lang
);
1690 expected_language
= current_language
; /* Don't warn the user. */
1693 /* If NAME is a remote name open the file using remote protocol, otherwise
1694 open it normally. Returns a new reference to the BFD. On error,
1695 returns NULL with the BFD error set. */
1698 bfd_open_maybe_remote (const char *name
)
1702 if (remote_filename_p (name
))
1703 result
= remote_bfd_open (name
, gnutarget
);
1705 result
= gdb_bfd_openr (name
, gnutarget
);
1711 /* Open the file specified by NAME and hand it off to BFD for
1712 preliminary analysis. Return a newly initialized bfd *, which
1713 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1714 absolute). In case of trouble, error() is called. */
1717 symfile_bfd_open (char *name
)
1721 char *absolute_name
;
1723 if (remote_filename_p (name
))
1725 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1727 error (_("`%s': can't open to read symbols: %s."), name
,
1728 bfd_errmsg (bfd_get_error ()));
1730 if (!bfd_check_format (sym_bfd
, bfd_object
))
1732 make_cleanup_bfd_unref (sym_bfd
);
1733 error (_("`%s': can't read symbols: %s."), name
,
1734 bfd_errmsg (bfd_get_error ()));
1740 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1742 /* Look down path for it, allocate 2nd new malloc'd copy. */
1743 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1744 O_RDONLY
| O_BINARY
, &absolute_name
);
1745 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1748 char *exename
= alloca (strlen (name
) + 5);
1750 strcat (strcpy (exename
, name
), ".exe");
1751 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1752 O_RDONLY
| O_BINARY
, &absolute_name
);
1757 make_cleanup (xfree
, name
);
1758 perror_with_name (name
);
1762 name
= absolute_name
;
1763 make_cleanup (xfree
, name
);
1765 sym_bfd
= gdb_bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1768 make_cleanup (xfree
, name
);
1769 error (_("`%s': can't open to read symbols: %s."), name
,
1770 bfd_errmsg (bfd_get_error ()));
1772 bfd_set_cacheable (sym_bfd
, 1);
1774 if (!bfd_check_format (sym_bfd
, bfd_object
))
1776 make_cleanup_bfd_unref (sym_bfd
);
1777 error (_("`%s': can't read symbols: %s."), name
,
1778 bfd_errmsg (bfd_get_error ()));
1784 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1785 the section was not found. */
1788 get_section_index (struct objfile
*objfile
, char *section_name
)
1790 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1798 /* Link SF into the global symtab_fns list. Called on startup by the
1799 _initialize routine in each object file format reader, to register
1800 information about each format the reader is prepared to handle. */
1803 add_symtab_fns (const struct sym_fns
*sf
)
1805 VEC_safe_push (sym_fns_ptr
, symtab_fns
, sf
);
1808 /* Initialize OBJFILE to read symbols from its associated BFD. It
1809 either returns or calls error(). The result is an initialized
1810 struct sym_fns in the objfile structure, that contains cached
1811 information about the symbol file. */
1813 static const struct sym_fns
*
1814 find_sym_fns (bfd
*abfd
)
1816 const struct sym_fns
*sf
;
1817 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1820 if (our_flavour
== bfd_target_srec_flavour
1821 || our_flavour
== bfd_target_ihex_flavour
1822 || our_flavour
== bfd_target_tekhex_flavour
)
1823 return NULL
; /* No symbols. */
1825 for (i
= 0; VEC_iterate (sym_fns_ptr
, symtab_fns
, i
, sf
); ++i
)
1826 if (our_flavour
== sf
->sym_flavour
)
1829 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1830 bfd_get_target (abfd
));
1834 /* This function runs the load command of our current target. */
1837 load_command (char *arg
, int from_tty
)
1841 /* The user might be reloading because the binary has changed. Take
1842 this opportunity to check. */
1843 reopen_exec_file ();
1851 parg
= arg
= get_exec_file (1);
1853 /* Count how many \ " ' tab space there are in the name. */
1854 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1862 /* We need to quote this string so buildargv can pull it apart. */
1863 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1867 make_cleanup (xfree
, temp
);
1870 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1872 strncpy (ptemp
, prev
, parg
- prev
);
1873 ptemp
+= parg
- prev
;
1877 strcpy (ptemp
, prev
);
1883 target_load (arg
, from_tty
);
1885 /* After re-loading the executable, we don't really know which
1886 overlays are mapped any more. */
1887 overlay_cache_invalid
= 1;
1890 /* This version of "load" should be usable for any target. Currently
1891 it is just used for remote targets, not inftarg.c or core files,
1892 on the theory that only in that case is it useful.
1894 Avoiding xmodem and the like seems like a win (a) because we don't have
1895 to worry about finding it, and (b) On VMS, fork() is very slow and so
1896 we don't want to run a subprocess. On the other hand, I'm not sure how
1897 performance compares. */
1899 static int validate_download
= 0;
1901 /* Callback service function for generic_load (bfd_map_over_sections). */
1904 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1906 bfd_size_type
*sum
= data
;
1908 *sum
+= bfd_get_section_size (asec
);
1911 /* Opaque data for load_section_callback. */
1912 struct load_section_data
{
1913 unsigned long load_offset
;
1914 struct load_progress_data
*progress_data
;
1915 VEC(memory_write_request_s
) *requests
;
1918 /* Opaque data for load_progress. */
1919 struct load_progress_data
{
1920 /* Cumulative data. */
1921 unsigned long write_count
;
1922 unsigned long data_count
;
1923 bfd_size_type total_size
;
1926 /* Opaque data for load_progress for a single section. */
1927 struct load_progress_section_data
{
1928 struct load_progress_data
*cumulative
;
1930 /* Per-section data. */
1931 const char *section_name
;
1932 ULONGEST section_sent
;
1933 ULONGEST section_size
;
1938 /* Target write callback routine for progress reporting. */
1941 load_progress (ULONGEST bytes
, void *untyped_arg
)
1943 struct load_progress_section_data
*args
= untyped_arg
;
1944 struct load_progress_data
*totals
;
1947 /* Writing padding data. No easy way to get at the cumulative
1948 stats, so just ignore this. */
1951 totals
= args
->cumulative
;
1953 if (bytes
== 0 && args
->section_sent
== 0)
1955 /* The write is just starting. Let the user know we've started
1957 ui_out_message (current_uiout
, 0, "Loading section %s, size %s lma %s\n",
1958 args
->section_name
, hex_string (args
->section_size
),
1959 paddress (target_gdbarch
, args
->lma
));
1963 if (validate_download
)
1965 /* Broken memories and broken monitors manifest themselves here
1966 when bring new computers to life. This doubles already slow
1968 /* NOTE: cagney/1999-10-18: A more efficient implementation
1969 might add a verify_memory() method to the target vector and
1970 then use that. remote.c could implement that method using
1971 the ``qCRC'' packet. */
1972 gdb_byte
*check
= xmalloc (bytes
);
1973 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1975 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1976 error (_("Download verify read failed at %s"),
1977 paddress (target_gdbarch
, args
->lma
));
1978 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1979 error (_("Download verify compare failed at %s"),
1980 paddress (target_gdbarch
, args
->lma
));
1981 do_cleanups (verify_cleanups
);
1983 totals
->data_count
+= bytes
;
1985 args
->buffer
+= bytes
;
1986 totals
->write_count
+= 1;
1987 args
->section_sent
+= bytes
;
1989 || (deprecated_ui_load_progress_hook
!= NULL
1990 && deprecated_ui_load_progress_hook (args
->section_name
,
1991 args
->section_sent
)))
1992 error (_("Canceled the download"));
1994 if (deprecated_show_load_progress
!= NULL
)
1995 deprecated_show_load_progress (args
->section_name
,
1999 totals
->total_size
);
2002 /* Callback service function for generic_load (bfd_map_over_sections). */
2005 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
2007 struct memory_write_request
*new_request
;
2008 struct load_section_data
*args
= data
;
2009 struct load_progress_section_data
*section_data
;
2010 bfd_size_type size
= bfd_get_section_size (asec
);
2012 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
2014 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
2020 new_request
= VEC_safe_push (memory_write_request_s
,
2021 args
->requests
, NULL
);
2022 memset (new_request
, 0, sizeof (struct memory_write_request
));
2023 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
2024 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
2025 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
2027 new_request
->data
= xmalloc (size
);
2028 new_request
->baton
= section_data
;
2030 buffer
= new_request
->data
;
2032 section_data
->cumulative
= args
->progress_data
;
2033 section_data
->section_name
= sect_name
;
2034 section_data
->section_size
= size
;
2035 section_data
->lma
= new_request
->begin
;
2036 section_data
->buffer
= buffer
;
2038 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2041 /* Clean up an entire memory request vector, including load
2042 data and progress records. */
2045 clear_memory_write_data (void *arg
)
2047 VEC(memory_write_request_s
) **vec_p
= arg
;
2048 VEC(memory_write_request_s
) *vec
= *vec_p
;
2050 struct memory_write_request
*mr
;
2052 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2057 VEC_free (memory_write_request_s
, vec
);
2061 generic_load (char *args
, int from_tty
)
2064 struct timeval start_time
, end_time
;
2066 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2067 struct load_section_data cbdata
;
2068 struct load_progress_data total_progress
;
2069 struct ui_out
*uiout
= current_uiout
;
2074 memset (&cbdata
, 0, sizeof (cbdata
));
2075 memset (&total_progress
, 0, sizeof (total_progress
));
2076 cbdata
.progress_data
= &total_progress
;
2078 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2081 error_no_arg (_("file to load"));
2083 argv
= gdb_buildargv (args
);
2084 make_cleanup_freeargv (argv
);
2086 filename
= tilde_expand (argv
[0]);
2087 make_cleanup (xfree
, filename
);
2089 if (argv
[1] != NULL
)
2093 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
2095 /* If the last word was not a valid number then
2096 treat it as a file name with spaces in. */
2097 if (argv
[1] == endptr
)
2098 error (_("Invalid download offset:%s."), argv
[1]);
2100 if (argv
[2] != NULL
)
2101 error (_("Too many parameters."));
2104 /* Open the file for loading. */
2105 loadfile_bfd
= gdb_bfd_openr (filename
, gnutarget
);
2106 if (loadfile_bfd
== NULL
)
2108 perror_with_name (filename
);
2112 make_cleanup_bfd_unref (loadfile_bfd
);
2114 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2116 error (_("\"%s\" is not an object file: %s"), filename
,
2117 bfd_errmsg (bfd_get_error ()));
2120 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2121 (void *) &total_progress
.total_size
);
2123 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2125 gettimeofday (&start_time
, NULL
);
2127 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2128 load_progress
) != 0)
2129 error (_("Load failed"));
2131 gettimeofday (&end_time
, NULL
);
2133 entry
= bfd_get_start_address (loadfile_bfd
);
2134 ui_out_text (uiout
, "Start address ");
2135 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
2136 ui_out_text (uiout
, ", load size ");
2137 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2138 ui_out_text (uiout
, "\n");
2139 /* We were doing this in remote-mips.c, I suspect it is right
2140 for other targets too. */
2141 regcache_write_pc (get_current_regcache (), entry
);
2143 /* Reset breakpoints, now that we have changed the load image. For
2144 instance, breakpoints may have been set (or reset, by
2145 post_create_inferior) while connected to the target but before we
2146 loaded the program. In that case, the prologue analyzer could
2147 have read instructions from the target to find the right
2148 breakpoint locations. Loading has changed the contents of that
2151 breakpoint_re_set ();
2153 /* FIXME: are we supposed to call symbol_file_add or not? According
2154 to a comment from remote-mips.c (where a call to symbol_file_add
2155 was commented out), making the call confuses GDB if more than one
2156 file is loaded in. Some targets do (e.g., remote-vx.c) but
2157 others don't (or didn't - perhaps they have all been deleted). */
2159 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2160 total_progress
.write_count
,
2161 &start_time
, &end_time
);
2163 do_cleanups (old_cleanups
);
2166 /* Report how fast the transfer went. */
2168 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2169 replaced by print_transfer_performance (with a very different
2170 function signature). */
2173 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2176 struct timeval start
, end
;
2178 start
.tv_sec
= start_time
;
2180 end
.tv_sec
= end_time
;
2183 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2187 print_transfer_performance (struct ui_file
*stream
,
2188 unsigned long data_count
,
2189 unsigned long write_count
,
2190 const struct timeval
*start_time
,
2191 const struct timeval
*end_time
)
2193 ULONGEST time_count
;
2194 struct ui_out
*uiout
= current_uiout
;
2196 /* Compute the elapsed time in milliseconds, as a tradeoff between
2197 accuracy and overflow. */
2198 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2199 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2201 ui_out_text (uiout
, "Transfer rate: ");
2204 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2206 if (ui_out_is_mi_like_p (uiout
))
2208 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2209 ui_out_text (uiout
, " bits/sec");
2211 else if (rate
< 1024)
2213 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2214 ui_out_text (uiout
, " bytes/sec");
2218 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2219 ui_out_text (uiout
, " KB/sec");
2224 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2225 ui_out_text (uiout
, " bits in <1 sec");
2227 if (write_count
> 0)
2229 ui_out_text (uiout
, ", ");
2230 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2231 ui_out_text (uiout
, " bytes/write");
2233 ui_out_text (uiout
, ".\n");
2236 /* This function allows the addition of incrementally linked object files.
2237 It does not modify any state in the target, only in the debugger. */
2238 /* Note: ezannoni 2000-04-13 This function/command used to have a
2239 special case syntax for the rombug target (Rombug is the boot
2240 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2241 rombug case, the user doesn't need to supply a text address,
2242 instead a call to target_link() (in target.c) would supply the
2243 value to use. We are now discontinuing this type of ad hoc syntax. */
2246 add_symbol_file_command (char *args
, int from_tty
)
2248 struct gdbarch
*gdbarch
= get_current_arch ();
2249 char *filename
= NULL
;
2250 int flags
= OBJF_USERLOADED
;
2252 int section_index
= 0;
2256 int expecting_sec_name
= 0;
2257 int expecting_sec_addr
= 0;
2266 struct section_addr_info
*section_addrs
;
2267 struct sect_opt
*sect_opts
= NULL
;
2268 size_t num_sect_opts
= 0;
2269 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2272 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2273 * sizeof (struct sect_opt
));
2278 error (_("add-symbol-file takes a file name and an address"));
2280 argv
= gdb_buildargv (args
);
2281 make_cleanup_freeargv (argv
);
2283 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2285 /* Process the argument. */
2288 /* The first argument is the file name. */
2289 filename
= tilde_expand (arg
);
2290 make_cleanup (xfree
, filename
);
2295 /* The second argument is always the text address at which
2296 to load the program. */
2297 sect_opts
[section_index
].name
= ".text";
2298 sect_opts
[section_index
].value
= arg
;
2299 if (++section_index
>= num_sect_opts
)
2302 sect_opts
= ((struct sect_opt
*)
2303 xrealloc (sect_opts
,
2305 * sizeof (struct sect_opt
)));
2310 /* It's an option (starting with '-') or it's an argument
2315 if (strcmp (arg
, "-readnow") == 0)
2316 flags
|= OBJF_READNOW
;
2317 else if (strcmp (arg
, "-s") == 0)
2319 expecting_sec_name
= 1;
2320 expecting_sec_addr
= 1;
2325 if (expecting_sec_name
)
2327 sect_opts
[section_index
].name
= arg
;
2328 expecting_sec_name
= 0;
2331 if (expecting_sec_addr
)
2333 sect_opts
[section_index
].value
= arg
;
2334 expecting_sec_addr
= 0;
2335 if (++section_index
>= num_sect_opts
)
2338 sect_opts
= ((struct sect_opt
*)
2339 xrealloc (sect_opts
,
2341 * sizeof (struct sect_opt
)));
2345 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2346 " [-readnow] [-s <secname> <addr>]*"));
2351 /* This command takes at least two arguments. The first one is a
2352 filename, and the second is the address where this file has been
2353 loaded. Abort now if this address hasn't been provided by the
2355 if (section_index
< 1)
2356 error (_("The address where %s has been loaded is missing"), filename
);
2358 /* Print the prompt for the query below. And save the arguments into
2359 a sect_addr_info structure to be passed around to other
2360 functions. We have to split this up into separate print
2361 statements because hex_string returns a local static
2364 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2365 section_addrs
= alloc_section_addr_info (section_index
);
2366 make_cleanup (xfree
, section_addrs
);
2367 for (i
= 0; i
< section_index
; i
++)
2370 char *val
= sect_opts
[i
].value
;
2371 char *sec
= sect_opts
[i
].name
;
2373 addr
= parse_and_eval_address (val
);
2375 /* Here we store the section offsets in the order they were
2376 entered on the command line. */
2377 section_addrs
->other
[sec_num
].name
= sec
;
2378 section_addrs
->other
[sec_num
].addr
= addr
;
2379 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2380 paddress (gdbarch
, addr
));
2383 /* The object's sections are initialized when a
2384 call is made to build_objfile_section_table (objfile).
2385 This happens in reread_symbols.
2386 At this point, we don't know what file type this is,
2387 so we can't determine what section names are valid. */
2390 if (from_tty
&& (!query ("%s", "")))
2391 error (_("Not confirmed."));
2393 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2394 section_addrs
, flags
);
2396 /* Getting new symbols may change our opinion about what is
2398 reinit_frame_cache ();
2399 do_cleanups (my_cleanups
);
2403 typedef struct objfile
*objfilep
;
2405 DEF_VEC_P (objfilep
);
2407 /* Re-read symbols if a symbol-file has changed. */
2409 reread_symbols (void)
2411 struct objfile
*objfile
;
2413 struct stat new_statbuf
;
2415 VEC (objfilep
) *new_objfiles
= NULL
;
2416 struct cleanup
*all_cleanups
;
2418 all_cleanups
= make_cleanup (VEC_cleanup (objfilep
), &new_objfiles
);
2420 /* With the addition of shared libraries, this should be modified,
2421 the load time should be saved in the partial symbol tables, since
2422 different tables may come from different source files. FIXME.
2423 This routine should then walk down each partial symbol table
2424 and see if the symbol table that it originates from has been changed. */
2426 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2428 /* solib-sunos.c creates one objfile with obfd. */
2429 if (objfile
->obfd
== NULL
)
2432 /* Separate debug objfiles are handled in the main objfile. */
2433 if (objfile
->separate_debug_objfile_backlink
)
2436 /* If this object is from an archive (what you usually create with
2437 `ar', often called a `static library' on most systems, though
2438 a `shared library' on AIX is also an archive), then you should
2439 stat on the archive name, not member name. */
2440 if (objfile
->obfd
->my_archive
)
2441 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2443 res
= stat (objfile
->name
, &new_statbuf
);
2446 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2447 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2451 new_modtime
= new_statbuf
.st_mtime
;
2452 if (new_modtime
!= objfile
->mtime
)
2454 struct cleanup
*old_cleanups
;
2455 struct section_offsets
*offsets
;
2457 char *obfd_filename
;
2459 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2462 /* There are various functions like symbol_file_add,
2463 symfile_bfd_open, syms_from_objfile, etc., which might
2464 appear to do what we want. But they have various other
2465 effects which we *don't* want. So we just do stuff
2466 ourselves. We don't worry about mapped files (for one thing,
2467 any mapped file will be out of date). */
2469 /* If we get an error, blow away this objfile (not sure if
2470 that is the correct response for things like shared
2472 old_cleanups
= make_cleanup_free_objfile (objfile
);
2473 /* We need to do this whenever any symbols go away. */
2474 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2476 if (exec_bfd
!= NULL
2477 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2478 bfd_get_filename (exec_bfd
)) == 0)
2480 /* Reload EXEC_BFD without asking anything. */
2482 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2485 /* Keep the calls order approx. the same as in free_objfile. */
2487 /* Free the separate debug objfiles. It will be
2488 automatically recreated by sym_read. */
2489 free_objfile_separate_debug (objfile
);
2491 /* Remove any references to this objfile in the global
2493 preserve_values (objfile
);
2495 /* Nuke all the state that we will re-read. Much of the following
2496 code which sets things to NULL really is necessary to tell
2497 other parts of GDB that there is nothing currently there.
2499 Try to keep the freeing order compatible with free_objfile. */
2501 if (objfile
->sf
!= NULL
)
2503 (*objfile
->sf
->sym_finish
) (objfile
);
2506 clear_objfile_data (objfile
);
2508 /* Clean up any state BFD has sitting around. We don't need
2509 to close the descriptor but BFD lacks a way of closing the
2510 BFD without closing the descriptor. */
2512 struct bfd
*obfd
= objfile
->obfd
;
2514 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2515 /* Open the new BFD before freeing the old one, so that
2516 the filename remains live. */
2517 objfile
->obfd
= bfd_open_maybe_remote (obfd_filename
);
2518 gdb_bfd_unref (obfd
);
2521 if (objfile
->obfd
== NULL
)
2522 error (_("Can't open %s to read symbols."), objfile
->name
);
2523 /* bfd_openr sets cacheable to true, which is what we want. */
2524 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2525 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2526 bfd_errmsg (bfd_get_error ()));
2528 /* Save the offsets, we will nuke them with the rest of the
2530 num_offsets
= objfile
->num_sections
;
2531 offsets
= ((struct section_offsets
*)
2532 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2533 memcpy (offsets
, objfile
->section_offsets
,
2534 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2536 /* FIXME: Do we have to free a whole linked list, or is this
2538 if (objfile
->global_psymbols
.list
)
2539 xfree (objfile
->global_psymbols
.list
);
2540 memset (&objfile
->global_psymbols
, 0,
2541 sizeof (objfile
->global_psymbols
));
2542 if (objfile
->static_psymbols
.list
)
2543 xfree (objfile
->static_psymbols
.list
);
2544 memset (&objfile
->static_psymbols
, 0,
2545 sizeof (objfile
->static_psymbols
));
2547 /* Free the obstacks for non-reusable objfiles. */
2548 psymbol_bcache_free (objfile
->psymbol_cache
);
2549 objfile
->psymbol_cache
= psymbol_bcache_init ();
2550 bcache_xfree (objfile
->macro_cache
);
2551 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2552 bcache_xfree (objfile
->filename_cache
);
2553 objfile
->filename_cache
= bcache_xmalloc (NULL
,NULL
);
2554 if (objfile
->demangled_names_hash
!= NULL
)
2556 htab_delete (objfile
->demangled_names_hash
);
2557 objfile
->demangled_names_hash
= NULL
;
2559 obstack_free (&objfile
->objfile_obstack
, 0);
2560 objfile
->sections
= NULL
;
2561 objfile
->symtabs
= NULL
;
2562 objfile
->psymtabs
= NULL
;
2563 objfile
->psymtabs_addrmap
= NULL
;
2564 objfile
->free_psymtabs
= NULL
;
2565 objfile
->template_symbols
= NULL
;
2566 objfile
->msymbols
= NULL
;
2567 objfile
->deprecated_sym_private
= NULL
;
2568 objfile
->minimal_symbol_count
= 0;
2569 memset (&objfile
->msymbol_hash
, 0,
2570 sizeof (objfile
->msymbol_hash
));
2571 memset (&objfile
->msymbol_demangled_hash
, 0,
2572 sizeof (objfile
->msymbol_demangled_hash
));
2574 /* obstack_init also initializes the obstack so it is
2575 empty. We could use obstack_specify_allocation but
2576 gdb_obstack.h specifies the alloc/dealloc functions. */
2577 obstack_init (&objfile
->objfile_obstack
);
2578 build_objfile_section_table (objfile
);
2579 terminate_minimal_symbol_table (objfile
);
2581 /* We use the same section offsets as from last time. I'm not
2582 sure whether that is always correct for shared libraries. */
2583 objfile
->section_offsets
= (struct section_offsets
*)
2584 obstack_alloc (&objfile
->objfile_obstack
,
2585 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2586 memcpy (objfile
->section_offsets
, offsets
,
2587 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2588 objfile
->num_sections
= num_offsets
;
2590 /* What the hell is sym_new_init for, anyway? The concept of
2591 distinguishing between the main file and additional files
2592 in this way seems rather dubious. */
2593 if (objfile
== symfile_objfile
)
2595 (*objfile
->sf
->sym_new_init
) (objfile
);
2598 (*objfile
->sf
->sym_init
) (objfile
);
2599 clear_complaints (&symfile_complaints
, 1, 1);
2600 /* Do not set flags as this is safe and we don't want to be
2602 (*objfile
->sf
->sym_read
) (objfile
, 0);
2603 if ((objfile
->flags
& OBJF_PSYMTABS_READ
) != 0)
2605 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2606 require_partial_symbols (objfile
, 0);
2609 if (!objfile_has_symbols (objfile
))
2612 printf_unfiltered (_("(no debugging symbols found)\n"));
2616 /* We're done reading the symbol file; finish off complaints. */
2617 clear_complaints (&symfile_complaints
, 0, 1);
2619 /* Getting new symbols may change our opinion about what is
2622 reinit_frame_cache ();
2624 /* Discard cleanups as symbol reading was successful. */
2625 discard_cleanups (old_cleanups
);
2627 /* If the mtime has changed between the time we set new_modtime
2628 and now, we *want* this to be out of date, so don't call stat
2630 objfile
->mtime
= new_modtime
;
2631 init_entry_point_info (objfile
);
2633 VEC_safe_push (objfilep
, new_objfiles
, objfile
);
2641 /* Notify objfiles that we've modified objfile sections. */
2642 objfiles_changed ();
2644 clear_symtab_users (0);
2646 /* clear_objfile_data for each objfile was called before freeing it and
2647 observer_notify_new_objfile (NULL) has been called by
2648 clear_symtab_users above. Notify the new files now. */
2649 for (ix
= 0; VEC_iterate (objfilep
, new_objfiles
, ix
, objfile
); ix
++)
2650 observer_notify_new_objfile (objfile
);
2652 /* At least one objfile has changed, so we can consider that
2653 the executable we're debugging has changed too. */
2654 observer_notify_executable_changed ();
2657 do_cleanups (all_cleanups
);
2669 static filename_language
*filename_language_table
;
2670 static int fl_table_size
, fl_table_next
;
2673 add_filename_language (char *ext
, enum language lang
)
2675 if (fl_table_next
>= fl_table_size
)
2677 fl_table_size
+= 10;
2678 filename_language_table
=
2679 xrealloc (filename_language_table
,
2680 fl_table_size
* sizeof (*filename_language_table
));
2683 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2684 filename_language_table
[fl_table_next
].lang
= lang
;
2688 static char *ext_args
;
2690 show_ext_args (struct ui_file
*file
, int from_tty
,
2691 struct cmd_list_element
*c
, const char *value
)
2693 fprintf_filtered (file
,
2694 _("Mapping between filename extension "
2695 "and source language is \"%s\".\n"),
2700 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2703 char *cp
= ext_args
;
2706 /* First arg is filename extension, starting with '.' */
2708 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2710 /* Find end of first arg. */
2711 while (*cp
&& !isspace (*cp
))
2715 error (_("'%s': two arguments required -- "
2716 "filename extension and language"),
2719 /* Null-terminate first arg. */
2722 /* Find beginning of second arg, which should be a source language. */
2723 while (*cp
&& isspace (*cp
))
2727 error (_("'%s': two arguments required -- "
2728 "filename extension and language"),
2731 /* Lookup the language from among those we know. */
2732 lang
= language_enum (cp
);
2734 /* Now lookup the filename extension: do we already know it? */
2735 for (i
= 0; i
< fl_table_next
; i
++)
2736 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2739 if (i
>= fl_table_next
)
2741 /* New file extension. */
2742 add_filename_language (ext_args
, lang
);
2746 /* Redefining a previously known filename extension. */
2749 /* query ("Really make files of type %s '%s'?", */
2750 /* ext_args, language_str (lang)); */
2752 xfree (filename_language_table
[i
].ext
);
2753 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2754 filename_language_table
[i
].lang
= lang
;
2759 info_ext_lang_command (char *args
, int from_tty
)
2763 printf_filtered (_("Filename extensions and the languages they represent:"));
2764 printf_filtered ("\n\n");
2765 for (i
= 0; i
< fl_table_next
; i
++)
2766 printf_filtered ("\t%s\t- %s\n",
2767 filename_language_table
[i
].ext
,
2768 language_str (filename_language_table
[i
].lang
));
2772 init_filename_language_table (void)
2774 if (fl_table_size
== 0) /* Protect against repetition. */
2778 filename_language_table
=
2779 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2780 add_filename_language (".c", language_c
);
2781 add_filename_language (".d", language_d
);
2782 add_filename_language (".C", language_cplus
);
2783 add_filename_language (".cc", language_cplus
);
2784 add_filename_language (".cp", language_cplus
);
2785 add_filename_language (".cpp", language_cplus
);
2786 add_filename_language (".cxx", language_cplus
);
2787 add_filename_language (".c++", language_cplus
);
2788 add_filename_language (".java", language_java
);
2789 add_filename_language (".class", language_java
);
2790 add_filename_language (".m", language_objc
);
2791 add_filename_language (".f", language_fortran
);
2792 add_filename_language (".F", language_fortran
);
2793 add_filename_language (".for", language_fortran
);
2794 add_filename_language (".FOR", language_fortran
);
2795 add_filename_language (".ftn", language_fortran
);
2796 add_filename_language (".FTN", language_fortran
);
2797 add_filename_language (".fpp", language_fortran
);
2798 add_filename_language (".FPP", language_fortran
);
2799 add_filename_language (".f90", language_fortran
);
2800 add_filename_language (".F90", language_fortran
);
2801 add_filename_language (".f95", language_fortran
);
2802 add_filename_language (".F95", language_fortran
);
2803 add_filename_language (".f03", language_fortran
);
2804 add_filename_language (".F03", language_fortran
);
2805 add_filename_language (".f08", language_fortran
);
2806 add_filename_language (".F08", language_fortran
);
2807 add_filename_language (".s", language_asm
);
2808 add_filename_language (".sx", language_asm
);
2809 add_filename_language (".S", language_asm
);
2810 add_filename_language (".pas", language_pascal
);
2811 add_filename_language (".p", language_pascal
);
2812 add_filename_language (".pp", language_pascal
);
2813 add_filename_language (".adb", language_ada
);
2814 add_filename_language (".ads", language_ada
);
2815 add_filename_language (".a", language_ada
);
2816 add_filename_language (".ada", language_ada
);
2817 add_filename_language (".dg", language_ada
);
2822 deduce_language_from_filename (const char *filename
)
2827 if (filename
!= NULL
)
2828 if ((cp
= strrchr (filename
, '.')) != NULL
)
2829 for (i
= 0; i
< fl_table_next
; i
++)
2830 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2831 return filename_language_table
[i
].lang
;
2833 return language_unknown
;
2838 Allocate and partly initialize a new symbol table. Return a pointer
2839 to it. error() if no space.
2841 Caller must set these fields:
2850 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2852 struct symtab
*symtab
;
2854 symtab
= (struct symtab
*)
2855 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2856 memset (symtab
, 0, sizeof (*symtab
));
2857 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2858 objfile
->filename_cache
);
2859 symtab
->fullname
= NULL
;
2860 symtab
->language
= deduce_language_from_filename (filename
);
2861 symtab
->debugformat
= "unknown";
2863 /* Hook it to the objfile it comes from. */
2865 symtab
->objfile
= objfile
;
2866 symtab
->next
= objfile
->symtabs
;
2867 objfile
->symtabs
= symtab
;
2869 if (symtab_create_debug
)
2871 /* Be a bit clever with debugging messages, and don't print objfile
2872 every time, only when it changes. */
2873 static char *last_objfile_name
= NULL
;
2875 if (last_objfile_name
== NULL
2876 || strcmp (last_objfile_name
, objfile
->name
) != 0)
2878 xfree (last_objfile_name
);
2879 last_objfile_name
= xstrdup (objfile
->name
);
2880 fprintf_unfiltered (gdb_stdlog
,
2881 "Creating one or more symtabs for objfile %s ...\n",
2884 fprintf_unfiltered (gdb_stdlog
,
2885 "Created symtab 0x%lx for module %s.\n",
2886 (long) symtab
, filename
);
2893 /* Reset all data structures in gdb which may contain references to symbol
2894 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2897 clear_symtab_users (int add_flags
)
2899 /* Someday, we should do better than this, by only blowing away
2900 the things that really need to be blown. */
2902 /* Clear the "current" symtab first, because it is no longer valid.
2903 breakpoint_re_set may try to access the current symtab. */
2904 clear_current_source_symtab_and_line ();
2907 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2908 breakpoint_re_set ();
2909 clear_last_displayed_sal ();
2910 clear_pc_function_cache ();
2911 observer_notify_new_objfile (NULL
);
2913 /* Clear globals which might have pointed into a removed objfile.
2914 FIXME: It's not clear which of these are supposed to persist
2915 between expressions and which ought to be reset each time. */
2916 expression_context_block
= NULL
;
2917 innermost_block
= NULL
;
2919 /* Varobj may refer to old symbols, perform a cleanup. */
2920 varobj_invalidate ();
2925 clear_symtab_users_cleanup (void *ignore
)
2927 clear_symtab_users (0);
2931 The following code implements an abstraction for debugging overlay sections.
2933 The target model is as follows:
2934 1) The gnu linker will permit multiple sections to be mapped into the
2935 same VMA, each with its own unique LMA (or load address).
2936 2) It is assumed that some runtime mechanism exists for mapping the
2937 sections, one by one, from the load address into the VMA address.
2938 3) This code provides a mechanism for gdb to keep track of which
2939 sections should be considered to be mapped from the VMA to the LMA.
2940 This information is used for symbol lookup, and memory read/write.
2941 For instance, if a section has been mapped then its contents
2942 should be read from the VMA, otherwise from the LMA.
2944 Two levels of debugger support for overlays are available. One is
2945 "manual", in which the debugger relies on the user to tell it which
2946 overlays are currently mapped. This level of support is
2947 implemented entirely in the core debugger, and the information about
2948 whether a section is mapped is kept in the objfile->obj_section table.
2950 The second level of support is "automatic", and is only available if
2951 the target-specific code provides functionality to read the target's
2952 overlay mapping table, and translate its contents for the debugger
2953 (by updating the mapped state information in the obj_section tables).
2955 The interface is as follows:
2957 overlay map <name> -- tell gdb to consider this section mapped
2958 overlay unmap <name> -- tell gdb to consider this section unmapped
2959 overlay list -- list the sections that GDB thinks are mapped
2960 overlay read-target -- get the target's state of what's mapped
2961 overlay off/manual/auto -- set overlay debugging state
2962 Functional interface:
2963 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2964 section, return that section.
2965 find_pc_overlay(pc): find any overlay section that contains
2966 the pc, either in its VMA or its LMA
2967 section_is_mapped(sect): true if overlay is marked as mapped
2968 section_is_overlay(sect): true if section's VMA != LMA
2969 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2970 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2971 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2972 overlay_mapped_address(...): map an address from section's LMA to VMA
2973 overlay_unmapped_address(...): map an address from section's VMA to LMA
2974 symbol_overlayed_address(...): Return a "current" address for symbol:
2975 either in VMA or LMA depending on whether
2976 the symbol's section is currently mapped. */
2978 /* Overlay debugging state: */
2980 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2981 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2983 /* Function: section_is_overlay (SECTION)
2984 Returns true if SECTION has VMA not equal to LMA, ie.
2985 SECTION is loaded at an address different from where it will "run". */
2988 section_is_overlay (struct obj_section
*section
)
2990 if (overlay_debugging
&& section
)
2992 bfd
*abfd
= section
->objfile
->obfd
;
2993 asection
*bfd_section
= section
->the_bfd_section
;
2995 if (bfd_section_lma (abfd
, bfd_section
) != 0
2996 && bfd_section_lma (abfd
, bfd_section
)
2997 != bfd_section_vma (abfd
, bfd_section
))
3004 /* Function: overlay_invalidate_all (void)
3005 Invalidate the mapped state of all overlay sections (mark it as stale). */
3008 overlay_invalidate_all (void)
3010 struct objfile
*objfile
;
3011 struct obj_section
*sect
;
3013 ALL_OBJSECTIONS (objfile
, sect
)
3014 if (section_is_overlay (sect
))
3015 sect
->ovly_mapped
= -1;
3018 /* Function: section_is_mapped (SECTION)
3019 Returns true if section is an overlay, and is currently mapped.
3021 Access to the ovly_mapped flag is restricted to this function, so
3022 that we can do automatic update. If the global flag
3023 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3024 overlay_invalidate_all. If the mapped state of the particular
3025 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3028 section_is_mapped (struct obj_section
*osect
)
3030 struct gdbarch
*gdbarch
;
3032 if (osect
== 0 || !section_is_overlay (osect
))
3035 switch (overlay_debugging
)
3039 return 0; /* overlay debugging off */
3040 case ovly_auto
: /* overlay debugging automatic */
3041 /* Unles there is a gdbarch_overlay_update function,
3042 there's really nothing useful to do here (can't really go auto). */
3043 gdbarch
= get_objfile_arch (osect
->objfile
);
3044 if (gdbarch_overlay_update_p (gdbarch
))
3046 if (overlay_cache_invalid
)
3048 overlay_invalidate_all ();
3049 overlay_cache_invalid
= 0;
3051 if (osect
->ovly_mapped
== -1)
3052 gdbarch_overlay_update (gdbarch
, osect
);
3054 /* fall thru to manual case */
3055 case ovly_on
: /* overlay debugging manual */
3056 return osect
->ovly_mapped
== 1;
3060 /* Function: pc_in_unmapped_range
3061 If PC falls into the lma range of SECTION, return true, else false. */
3064 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3066 if (section_is_overlay (section
))
3068 bfd
*abfd
= section
->objfile
->obfd
;
3069 asection
*bfd_section
= section
->the_bfd_section
;
3071 /* We assume the LMA is relocated by the same offset as the VMA. */
3072 bfd_vma size
= bfd_get_section_size (bfd_section
);
3073 CORE_ADDR offset
= obj_section_offset (section
);
3075 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3076 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3083 /* Function: pc_in_mapped_range
3084 If PC falls into the vma range of SECTION, return true, else false. */
3087 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3089 if (section_is_overlay (section
))
3091 if (obj_section_addr (section
) <= pc
3092 && pc
< obj_section_endaddr (section
))
3100 /* Return true if the mapped ranges of sections A and B overlap, false
3103 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3105 CORE_ADDR a_start
= obj_section_addr (a
);
3106 CORE_ADDR a_end
= obj_section_endaddr (a
);
3107 CORE_ADDR b_start
= obj_section_addr (b
);
3108 CORE_ADDR b_end
= obj_section_endaddr (b
);
3110 return (a_start
< b_end
&& b_start
< a_end
);
3113 /* Function: overlay_unmapped_address (PC, SECTION)
3114 Returns the address corresponding to PC in the unmapped (load) range.
3115 May be the same as PC. */
3118 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3120 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3122 bfd
*abfd
= section
->objfile
->obfd
;
3123 asection
*bfd_section
= section
->the_bfd_section
;
3125 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3126 - bfd_section_vma (abfd
, bfd_section
);
3132 /* Function: overlay_mapped_address (PC, SECTION)
3133 Returns the address corresponding to PC in the mapped (runtime) range.
3134 May be the same as PC. */
3137 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3139 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3141 bfd
*abfd
= section
->objfile
->obfd
;
3142 asection
*bfd_section
= section
->the_bfd_section
;
3144 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3145 - bfd_section_lma (abfd
, bfd_section
);
3152 /* Function: symbol_overlayed_address
3153 Return one of two addresses (relative to the VMA or to the LMA),
3154 depending on whether the section is mapped or not. */
3157 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3159 if (overlay_debugging
)
3161 /* If the symbol has no section, just return its regular address. */
3164 /* If the symbol's section is not an overlay, just return its
3166 if (!section_is_overlay (section
))
3168 /* If the symbol's section is mapped, just return its address. */
3169 if (section_is_mapped (section
))
3172 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3173 * then return its LOADED address rather than its vma address!!
3175 return overlay_unmapped_address (address
, section
);
3180 /* Function: find_pc_overlay (PC)
3181 Return the best-match overlay section for PC:
3182 If PC matches a mapped overlay section's VMA, return that section.
3183 Else if PC matches an unmapped section's VMA, return that section.
3184 Else if PC matches an unmapped section's LMA, return that section. */
3186 struct obj_section
*
3187 find_pc_overlay (CORE_ADDR pc
)
3189 struct objfile
*objfile
;
3190 struct obj_section
*osect
, *best_match
= NULL
;
3192 if (overlay_debugging
)
3193 ALL_OBJSECTIONS (objfile
, osect
)
3194 if (section_is_overlay (osect
))
3196 if (pc_in_mapped_range (pc
, osect
))
3198 if (section_is_mapped (osect
))
3203 else if (pc_in_unmapped_range (pc
, osect
))
3209 /* Function: find_pc_mapped_section (PC)
3210 If PC falls into the VMA address range of an overlay section that is
3211 currently marked as MAPPED, return that section. Else return NULL. */
3213 struct obj_section
*
3214 find_pc_mapped_section (CORE_ADDR pc
)
3216 struct objfile
*objfile
;
3217 struct obj_section
*osect
;
3219 if (overlay_debugging
)
3220 ALL_OBJSECTIONS (objfile
, osect
)
3221 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3227 /* Function: list_overlays_command
3228 Print a list of mapped sections and their PC ranges. */
3231 list_overlays_command (char *args
, int from_tty
)
3234 struct objfile
*objfile
;
3235 struct obj_section
*osect
;
3237 if (overlay_debugging
)
3238 ALL_OBJSECTIONS (objfile
, osect
)
3239 if (section_is_mapped (osect
))
3241 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3246 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3247 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3248 size
= bfd_get_section_size (osect
->the_bfd_section
);
3249 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3251 printf_filtered ("Section %s, loaded at ", name
);
3252 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3253 puts_filtered (" - ");
3254 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3255 printf_filtered (", mapped at ");
3256 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3257 puts_filtered (" - ");
3258 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3259 puts_filtered ("\n");
3264 printf_filtered (_("No sections are mapped.\n"));
3267 /* Function: map_overlay_command
3268 Mark the named section as mapped (ie. residing at its VMA address). */
3271 map_overlay_command (char *args
, int from_tty
)
3273 struct objfile
*objfile
, *objfile2
;
3274 struct obj_section
*sec
, *sec2
;
3276 if (!overlay_debugging
)
3277 error (_("Overlay debugging not enabled. Use "
3278 "either the 'overlay auto' or\n"
3279 "the 'overlay manual' command."));
3281 if (args
== 0 || *args
== 0)
3282 error (_("Argument required: name of an overlay section"));
3284 /* First, find a section matching the user supplied argument. */
3285 ALL_OBJSECTIONS (objfile
, sec
)
3286 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3288 /* Now, check to see if the section is an overlay. */
3289 if (!section_is_overlay (sec
))
3290 continue; /* not an overlay section */
3292 /* Mark the overlay as "mapped". */
3293 sec
->ovly_mapped
= 1;
3295 /* Next, make a pass and unmap any sections that are
3296 overlapped by this new section: */
3297 ALL_OBJSECTIONS (objfile2
, sec2
)
3298 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3301 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3302 bfd_section_name (objfile
->obfd
,
3303 sec2
->the_bfd_section
));
3304 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3308 error (_("No overlay section called %s"), args
);
3311 /* Function: unmap_overlay_command
3312 Mark the overlay section as unmapped
3313 (ie. resident in its LMA address range, rather than the VMA range). */
3316 unmap_overlay_command (char *args
, int from_tty
)
3318 struct objfile
*objfile
;
3319 struct obj_section
*sec
;
3321 if (!overlay_debugging
)
3322 error (_("Overlay debugging not enabled. "
3323 "Use either the 'overlay auto' or\n"
3324 "the 'overlay manual' command."));
3326 if (args
== 0 || *args
== 0)
3327 error (_("Argument required: name of an overlay section"));
3329 /* First, find a section matching the user supplied argument. */
3330 ALL_OBJSECTIONS (objfile
, sec
)
3331 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3333 if (!sec
->ovly_mapped
)
3334 error (_("Section %s is not mapped"), args
);
3335 sec
->ovly_mapped
= 0;
3338 error (_("No overlay section called %s"), args
);
3341 /* Function: overlay_auto_command
3342 A utility command to turn on overlay debugging.
3343 Possibly this should be done via a set/show command. */
3346 overlay_auto_command (char *args
, int from_tty
)
3348 overlay_debugging
= ovly_auto
;
3349 enable_overlay_breakpoints ();
3351 printf_unfiltered (_("Automatic overlay debugging enabled."));
3354 /* Function: overlay_manual_command
3355 A utility command to turn on overlay debugging.
3356 Possibly this should be done via a set/show command. */
3359 overlay_manual_command (char *args
, int from_tty
)
3361 overlay_debugging
= ovly_on
;
3362 disable_overlay_breakpoints ();
3364 printf_unfiltered (_("Overlay debugging enabled."));
3367 /* Function: overlay_off_command
3368 A utility command to turn on overlay debugging.
3369 Possibly this should be done via a set/show command. */
3372 overlay_off_command (char *args
, int from_tty
)
3374 overlay_debugging
= ovly_off
;
3375 disable_overlay_breakpoints ();
3377 printf_unfiltered (_("Overlay debugging disabled."));
3381 overlay_load_command (char *args
, int from_tty
)
3383 struct gdbarch
*gdbarch
= get_current_arch ();
3385 if (gdbarch_overlay_update_p (gdbarch
))
3386 gdbarch_overlay_update (gdbarch
, NULL
);
3388 error (_("This target does not know how to read its overlay state."));
3391 /* Function: overlay_command
3392 A place-holder for a mis-typed command. */
3394 /* Command list chain containing all defined "overlay" subcommands. */
3395 struct cmd_list_element
*overlaylist
;
3398 overlay_command (char *args
, int from_tty
)
3401 ("\"overlay\" must be followed by the name of an overlay command.\n");
3402 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3406 /* Target Overlays for the "Simplest" overlay manager:
3408 This is GDB's default target overlay layer. It works with the
3409 minimal overlay manager supplied as an example by Cygnus. The
3410 entry point is via a function pointer "gdbarch_overlay_update",
3411 so targets that use a different runtime overlay manager can
3412 substitute their own overlay_update function and take over the
3415 The overlay_update function pokes around in the target's data structures
3416 to see what overlays are mapped, and updates GDB's overlay mapping with
3419 In this simple implementation, the target data structures are as follows:
3420 unsigned _novlys; /# number of overlay sections #/
3421 unsigned _ovly_table[_novlys][4] = {
3422 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3423 {..., ..., ..., ...},
3425 unsigned _novly_regions; /# number of overlay regions #/
3426 unsigned _ovly_region_table[_novly_regions][3] = {
3427 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3430 These functions will attempt to update GDB's mappedness state in the
3431 symbol section table, based on the target's mappedness state.
3433 To do this, we keep a cached copy of the target's _ovly_table, and
3434 attempt to detect when the cached copy is invalidated. The main
3435 entry point is "simple_overlay_update(SECT), which looks up SECT in
3436 the cached table and re-reads only the entry for that section from
3437 the target (whenever possible). */
3439 /* Cached, dynamically allocated copies of the target data structures: */
3440 static unsigned (*cache_ovly_table
)[4] = 0;
3441 static unsigned cache_novlys
= 0;
3442 static CORE_ADDR cache_ovly_table_base
= 0;
3445 VMA
, SIZE
, LMA
, MAPPED
3448 /* Throw away the cached copy of _ovly_table. */
3450 simple_free_overlay_table (void)
3452 if (cache_ovly_table
)
3453 xfree (cache_ovly_table
);
3455 cache_ovly_table
= NULL
;
3456 cache_ovly_table_base
= 0;
3459 /* Read an array of ints of size SIZE from the target into a local buffer.
3460 Convert to host order. int LEN is number of ints. */
3462 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3463 int len
, int size
, enum bfd_endian byte_order
)
3465 /* FIXME (alloca): Not safe if array is very large. */
3466 gdb_byte
*buf
= alloca (len
* size
);
3469 read_memory (memaddr
, buf
, len
* size
);
3470 for (i
= 0; i
< len
; i
++)
3471 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3474 /* Find and grab a copy of the target _ovly_table
3475 (and _novlys, which is needed for the table's size). */
3477 simple_read_overlay_table (void)
3479 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3480 struct gdbarch
*gdbarch
;
3482 enum bfd_endian byte_order
;
3484 simple_free_overlay_table ();
3485 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3488 error (_("Error reading inferior's overlay table: "
3489 "couldn't find `_novlys' variable\n"
3490 "in inferior. Use `overlay manual' mode."));
3494 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3495 if (! ovly_table_msym
)
3497 error (_("Error reading inferior's overlay table: couldn't find "
3498 "`_ovly_table' array\n"
3499 "in inferior. Use `overlay manual' mode."));
3503 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3504 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3505 byte_order
= gdbarch_byte_order (gdbarch
);
3507 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3510 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3511 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3512 read_target_long_array (cache_ovly_table_base
,
3513 (unsigned int *) cache_ovly_table
,
3514 cache_novlys
* 4, word_size
, byte_order
);
3516 return 1; /* SUCCESS */
3519 /* Function: simple_overlay_update_1
3520 A helper function for simple_overlay_update. Assuming a cached copy
3521 of _ovly_table exists, look through it to find an entry whose vma,
3522 lma and size match those of OSECT. Re-read the entry and make sure
3523 it still matches OSECT (else the table may no longer be valid).
3524 Set OSECT's mapped state to match the entry. Return: 1 for
3525 success, 0 for failure. */
3528 simple_overlay_update_1 (struct obj_section
*osect
)
3531 bfd
*obfd
= osect
->objfile
->obfd
;
3532 asection
*bsect
= osect
->the_bfd_section
;
3533 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3534 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3535 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3537 size
= bfd_get_section_size (osect
->the_bfd_section
);
3538 for (i
= 0; i
< cache_novlys
; i
++)
3539 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3540 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3541 /* && cache_ovly_table[i][SIZE] == size */ )
3543 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3544 (unsigned int *) cache_ovly_table
[i
],
3545 4, word_size
, byte_order
);
3546 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3547 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3548 /* && cache_ovly_table[i][SIZE] == size */ )
3550 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3553 else /* Warning! Warning! Target's ovly table has changed! */
3559 /* Function: simple_overlay_update
3560 If OSECT is NULL, then update all sections' mapped state
3561 (after re-reading the entire target _ovly_table).
3562 If OSECT is non-NULL, then try to find a matching entry in the
3563 cached ovly_table and update only OSECT's mapped state.
3564 If a cached entry can't be found or the cache isn't valid, then
3565 re-read the entire cache, and go ahead and update all sections. */
3568 simple_overlay_update (struct obj_section
*osect
)
3570 struct objfile
*objfile
;
3572 /* Were we given an osect to look up? NULL means do all of them. */
3574 /* Have we got a cached copy of the target's overlay table? */
3575 if (cache_ovly_table
!= NULL
)
3577 /* Does its cached location match what's currently in the
3579 struct minimal_symbol
*minsym
3580 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3583 error (_("Error reading inferior's overlay table: couldn't "
3584 "find `_ovly_table' array\n"
3585 "in inferior. Use `overlay manual' mode."));
3587 if (cache_ovly_table_base
== SYMBOL_VALUE_ADDRESS (minsym
))
3588 /* Then go ahead and try to look up this single section in
3590 if (simple_overlay_update_1 (osect
))
3591 /* Found it! We're done. */
3595 /* Cached table no good: need to read the entire table anew.
3596 Or else we want all the sections, in which case it's actually
3597 more efficient to read the whole table in one block anyway. */
3599 if (! simple_read_overlay_table ())
3602 /* Now may as well update all sections, even if only one was requested. */
3603 ALL_OBJSECTIONS (objfile
, osect
)
3604 if (section_is_overlay (osect
))
3607 bfd
*obfd
= osect
->objfile
->obfd
;
3608 asection
*bsect
= osect
->the_bfd_section
;
3610 size
= bfd_get_section_size (bsect
);
3611 for (i
= 0; i
< cache_novlys
; i
++)
3612 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3613 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3614 /* && cache_ovly_table[i][SIZE] == size */ )
3615 { /* obj_section matches i'th entry in ovly_table. */
3616 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3617 break; /* finished with inner for loop: break out. */
3622 /* Set the output sections and output offsets for section SECTP in
3623 ABFD. The relocation code in BFD will read these offsets, so we
3624 need to be sure they're initialized. We map each section to itself,
3625 with no offset; this means that SECTP->vma will be honored. */
3628 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3630 sectp
->output_section
= sectp
;
3631 sectp
->output_offset
= 0;
3634 /* Default implementation for sym_relocate. */
3638 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3641 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3643 bfd
*abfd
= sectp
->owner
;
3645 /* We're only interested in sections with relocation
3647 if ((sectp
->flags
& SEC_RELOC
) == 0)
3650 /* We will handle section offsets properly elsewhere, so relocate as if
3651 all sections begin at 0. */
3652 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3654 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3657 /* Relocate the contents of a debug section SECTP in ABFD. The
3658 contents are stored in BUF if it is non-NULL, or returned in a
3659 malloc'd buffer otherwise.
3661 For some platforms and debug info formats, shared libraries contain
3662 relocations against the debug sections (particularly for DWARF-2;
3663 one affected platform is PowerPC GNU/Linux, although it depends on
3664 the version of the linker in use). Also, ELF object files naturally
3665 have unresolved relocations for their debug sections. We need to apply
3666 the relocations in order to get the locations of symbols correct.
3667 Another example that may require relocation processing, is the
3668 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3672 symfile_relocate_debug_section (struct objfile
*objfile
,
3673 asection
*sectp
, bfd_byte
*buf
)
3675 gdb_assert (objfile
->sf
->sym_relocate
);
3677 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3680 struct symfile_segment_data
*
3681 get_symfile_segment_data (bfd
*abfd
)
3683 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3688 return sf
->sym_segments (abfd
);
3692 free_symfile_segment_data (struct symfile_segment_data
*data
)
3694 xfree (data
->segment_bases
);
3695 xfree (data
->segment_sizes
);
3696 xfree (data
->segment_info
);
3702 - DATA, containing segment addresses from the object file ABFD, and
3703 the mapping from ABFD's sections onto the segments that own them,
3705 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3706 segment addresses reported by the target,
3707 store the appropriate offsets for each section in OFFSETS.
3709 If there are fewer entries in SEGMENT_BASES than there are segments
3710 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3712 If there are more entries, then ignore the extra. The target may
3713 not be able to distinguish between an empty data segment and a
3714 missing data segment; a missing text segment is less plausible. */
3716 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3717 struct section_offsets
*offsets
,
3718 int num_segment_bases
,
3719 const CORE_ADDR
*segment_bases
)
3724 /* It doesn't make sense to call this function unless you have some
3725 segment base addresses. */
3726 gdb_assert (num_segment_bases
> 0);
3728 /* If we do not have segment mappings for the object file, we
3729 can not relocate it by segments. */
3730 gdb_assert (data
!= NULL
);
3731 gdb_assert (data
->num_segments
> 0);
3733 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3735 int which
= data
->segment_info
[i
];
3737 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3739 /* Don't bother computing offsets for sections that aren't
3740 loaded as part of any segment. */
3744 /* Use the last SEGMENT_BASES entry as the address of any extra
3745 segments mentioned in DATA->segment_info. */
3746 if (which
> num_segment_bases
)
3747 which
= num_segment_bases
;
3749 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3750 - data
->segment_bases
[which
- 1]);
3757 symfile_find_segment_sections (struct objfile
*objfile
)
3759 bfd
*abfd
= objfile
->obfd
;
3762 struct symfile_segment_data
*data
;
3764 data
= get_symfile_segment_data (objfile
->obfd
);
3768 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3770 free_symfile_segment_data (data
);
3774 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3776 int which
= data
->segment_info
[i
];
3780 if (objfile
->sect_index_text
== -1)
3781 objfile
->sect_index_text
= sect
->index
;
3783 if (objfile
->sect_index_rodata
== -1)
3784 objfile
->sect_index_rodata
= sect
->index
;
3786 else if (which
== 2)
3788 if (objfile
->sect_index_data
== -1)
3789 objfile
->sect_index_data
= sect
->index
;
3791 if (objfile
->sect_index_bss
== -1)
3792 objfile
->sect_index_bss
= sect
->index
;
3796 free_symfile_segment_data (data
);
3800 _initialize_symfile (void)
3802 struct cmd_list_element
*c
;
3804 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3805 Load symbol table from executable file FILE.\n\
3806 The `file' command can also load symbol tables, as well as setting the file\n\
3807 to execute."), &cmdlist
);
3808 set_cmd_completer (c
, filename_completer
);
3810 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3811 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3812 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3813 ...]\nADDR is the starting address of the file's text.\n\
3814 The optional arguments are section-name section-address pairs and\n\
3815 should be specified if the data and bss segments are not contiguous\n\
3816 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3818 set_cmd_completer (c
, filename_completer
);
3820 c
= add_cmd ("load", class_files
, load_command
, _("\
3821 Dynamically load FILE into the running program, and record its symbols\n\
3822 for access from GDB.\n\
3823 A load OFFSET may also be given."), &cmdlist
);
3824 set_cmd_completer (c
, filename_completer
);
3826 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3827 _("Commands for debugging overlays."), &overlaylist
,
3828 "overlay ", 0, &cmdlist
);
3830 add_com_alias ("ovly", "overlay", class_alias
, 1);
3831 add_com_alias ("ov", "overlay", class_alias
, 1);
3833 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3834 _("Assert that an overlay section is mapped."), &overlaylist
);
3836 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3837 _("Assert that an overlay section is unmapped."), &overlaylist
);
3839 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3840 _("List mappings of overlay sections."), &overlaylist
);
3842 add_cmd ("manual", class_support
, overlay_manual_command
,
3843 _("Enable overlay debugging."), &overlaylist
);
3844 add_cmd ("off", class_support
, overlay_off_command
,
3845 _("Disable overlay debugging."), &overlaylist
);
3846 add_cmd ("auto", class_support
, overlay_auto_command
,
3847 _("Enable automatic overlay debugging."), &overlaylist
);
3848 add_cmd ("load-target", class_support
, overlay_load_command
,
3849 _("Read the overlay mapping state from the target."), &overlaylist
);
3851 /* Filename extension to source language lookup table: */
3852 init_filename_language_table ();
3853 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3855 Set mapping between filename extension and source language."), _("\
3856 Show mapping between filename extension and source language."), _("\
3857 Usage: set extension-language .foo bar"),
3858 set_ext_lang_command
,
3860 &setlist
, &showlist
);
3862 add_info ("extensions", info_ext_lang_command
,
3863 _("All filename extensions associated with a source language."));
3865 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3866 &debug_file_directory
, _("\
3867 Set the directories where separate debug symbols are searched for."), _("\
3868 Show the directories where separate debug symbols are searched for."), _("\
3869 Separate debug symbols are first searched for in the same\n\
3870 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3871 and lastly at the path of the directory of the binary with\n\
3872 each global debug-file-directory component prepended."),
3874 show_debug_file_directory
,
3875 &setlist
, &showlist
);