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 A new reference is acquired 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 const char *name
= bfd_get_filename (abfd
);
1065 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1066 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1067 const int should_print
= ((from_tty
|| info_verbose
)
1068 && (readnow_symbol_files
1069 || (add_flags
& SYMFILE_NO_READ
) == 0));
1071 if (readnow_symbol_files
)
1073 flags
|= OBJF_READNOW
;
1074 add_flags
&= ~SYMFILE_NO_READ
;
1077 /* Give user a chance to burp if we'd be
1078 interactively wiping out any existing symbols. */
1080 if ((have_full_symbols () || have_partial_symbols ())
1083 && !query (_("Load new symbol table from \"%s\"? "), name
))
1084 error (_("Not confirmed."));
1086 objfile
= allocate_objfile (abfd
, flags
| (mainline
? OBJF_MAINLINE
: 0));
1089 add_separate_debug_objfile (objfile
, parent
);
1091 /* We either created a new mapped symbol table, mapped an existing
1092 symbol table file which has not had initial symbol reading
1093 performed, or need to read an unmapped symbol table. */
1096 if (deprecated_pre_add_symbol_hook
)
1097 deprecated_pre_add_symbol_hook (name
);
1100 printf_unfiltered (_("Reading symbols from %s..."), name
);
1102 gdb_flush (gdb_stdout
);
1105 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1108 /* We now have at least a partial symbol table. Check to see if the
1109 user requested that all symbols be read on initial access via either
1110 the gdb startup command line or on a per symbol file basis. Expand
1111 all partial symbol tables for this objfile if so. */
1113 if ((flags
& OBJF_READNOW
))
1117 printf_unfiltered (_("expanding to full symbols..."));
1119 gdb_flush (gdb_stdout
);
1123 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1126 if (should_print
&& !objfile_has_symbols (objfile
))
1129 printf_unfiltered (_("(no debugging symbols found)..."));
1135 if (deprecated_post_add_symbol_hook
)
1136 deprecated_post_add_symbol_hook ();
1138 printf_unfiltered (_("done.\n"));
1141 /* We print some messages regardless of whether 'from_tty ||
1142 info_verbose' is true, so make sure they go out at the right
1144 gdb_flush (gdb_stdout
);
1146 if (objfile
->sf
== NULL
)
1148 observer_notify_new_objfile (objfile
);
1149 return objfile
; /* No symbols. */
1152 new_symfile_objfile (objfile
, add_flags
);
1154 observer_notify_new_objfile (objfile
);
1156 bfd_cache_close_all ();
1160 /* Add BFD as a separate debug file for OBJFILE. */
1163 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1165 struct objfile
*new_objfile
;
1166 struct section_addr_info
*sap
;
1167 struct cleanup
*my_cleanup
;
1169 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1170 because sections of BFD may not match sections of OBJFILE and because
1171 vma may have been modified by tools such as prelink. */
1172 sap
= build_section_addr_info_from_objfile (objfile
);
1173 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1175 new_objfile
= symbol_file_add_with_addrs_or_offsets
1176 (bfd
, symfile_flags
,
1178 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1182 do_cleanups (my_cleanup
);
1185 /* Process the symbol file ABFD, as either the main file or as a
1186 dynamically loaded file.
1188 See symbol_file_add_with_addrs_or_offsets's comments for
1191 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1192 struct section_addr_info
*addrs
,
1193 int flags
, struct objfile
*parent
)
1195 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1200 /* Process a symbol file, as either the main file or as a dynamically
1201 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1204 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1207 bfd
*bfd
= symfile_bfd_open (name
);
1208 struct cleanup
*cleanup
= make_cleanup_bfd_unref (bfd
);
1209 struct objfile
*objf
;
1211 objf
= symbol_file_add_from_bfd (bfd
, add_flags
, addrs
, flags
, NULL
);
1212 do_cleanups (cleanup
);
1217 /* Call symbol_file_add() with default values and update whatever is
1218 affected by the loading of a new main().
1219 Used when the file is supplied in the gdb command line
1220 and by some targets with special loading requirements.
1221 The auxiliary function, symbol_file_add_main_1(), has the flags
1222 argument for the switches that can only be specified in the symbol_file
1226 symbol_file_add_main (char *args
, int from_tty
)
1228 symbol_file_add_main_1 (args
, from_tty
, 0);
1232 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1234 const int add_flags
= (current_inferior ()->symfile_flags
1235 | SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0));
1237 symbol_file_add (args
, add_flags
, NULL
, flags
);
1239 /* Getting new symbols may change our opinion about
1240 what is frameless. */
1241 reinit_frame_cache ();
1243 if ((flags
& SYMFILE_NO_READ
) == 0)
1244 set_initial_language ();
1248 symbol_file_clear (int from_tty
)
1250 if ((have_full_symbols () || have_partial_symbols ())
1253 ? !query (_("Discard symbol table from `%s'? "),
1254 symfile_objfile
->name
)
1255 : !query (_("Discard symbol table? "))))
1256 error (_("Not confirmed."));
1258 /* solib descriptors may have handles to objfiles. Wipe them before their
1259 objfiles get stale by free_all_objfiles. */
1260 no_shared_libraries (NULL
, from_tty
);
1262 free_all_objfiles ();
1264 gdb_assert (symfile_objfile
== NULL
);
1266 printf_unfiltered (_("No symbol file now.\n"));
1270 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1273 bfd_size_type debuglink_size
;
1274 unsigned long crc32
;
1278 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1283 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1285 contents
= xmalloc (debuglink_size
);
1286 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1287 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1289 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1290 crc_offset
= strlen (contents
) + 1;
1291 crc_offset
= (crc_offset
+ 3) & ~3;
1293 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1299 /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and
1300 return 1. Otherwise print a warning and return 0. ABFD seek position is
1304 get_file_crc (bfd
*abfd
, unsigned long *file_crc_return
)
1306 unsigned long file_crc
= 0;
1308 if (bfd_seek (abfd
, 0, SEEK_SET
) != 0)
1310 warning (_("Problem reading \"%s\" for CRC: %s"),
1311 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1317 gdb_byte buffer
[8 * 1024];
1318 bfd_size_type count
;
1320 count
= bfd_bread (buffer
, sizeof (buffer
), abfd
);
1321 if (count
== (bfd_size_type
) -1)
1323 warning (_("Problem reading \"%s\" for CRC: %s"),
1324 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1329 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1332 *file_crc_return
= file_crc
;
1337 separate_debug_file_exists (const char *name
, unsigned long crc
,
1338 struct objfile
*parent_objfile
)
1340 unsigned long file_crc
;
1343 struct stat parent_stat
, abfd_stat
;
1344 int verified_as_different
;
1346 /* Find a separate debug info file as if symbols would be present in
1347 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1348 section can contain just the basename of PARENT_OBJFILE without any
1349 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1350 the separate debug infos with the same basename can exist. */
1352 if (filename_cmp (name
, parent_objfile
->name
) == 0)
1355 abfd
= gdb_bfd_open_maybe_remote (name
);
1360 /* Verify symlinks were not the cause of filename_cmp name difference above.
1362 Some operating systems, e.g. Windows, do not provide a meaningful
1363 st_ino; they always set it to zero. (Windows does provide a
1364 meaningful st_dev.) Do not indicate a duplicate library in that
1365 case. While there is no guarantee that a system that provides
1366 meaningful inode numbers will never set st_ino to zero, this is
1367 merely an optimization, so we do not need to worry about false
1370 if (bfd_stat (abfd
, &abfd_stat
) == 0
1371 && abfd_stat
.st_ino
!= 0
1372 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1374 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1375 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1377 gdb_bfd_unref (abfd
);
1380 verified_as_different
= 1;
1383 verified_as_different
= 0;
1385 file_crc_p
= get_file_crc (abfd
, &file_crc
);
1387 gdb_bfd_unref (abfd
);
1392 if (crc
!= file_crc
)
1394 /* If one (or both) the files are accessed for example the via "remote:"
1395 gdbserver way it does not support the bfd_stat operation. Verify
1396 whether those two files are not the same manually. */
1398 if (!verified_as_different
&& !parent_objfile
->crc32_p
)
1400 parent_objfile
->crc32_p
= get_file_crc (parent_objfile
->obfd
,
1401 &parent_objfile
->crc32
);
1402 if (!parent_objfile
->crc32_p
)
1406 if (verified_as_different
|| parent_objfile
->crc32
!= file_crc
)
1407 warning (_("the debug information found in \"%s\""
1408 " does not match \"%s\" (CRC mismatch).\n"),
1409 name
, parent_objfile
->name
);
1417 char *debug_file_directory
= NULL
;
1419 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1420 struct cmd_list_element
*c
, const char *value
)
1422 fprintf_filtered (file
,
1423 _("The directory where separate debug "
1424 "symbols are searched for is \"%s\".\n"),
1428 #if ! defined (DEBUG_SUBDIRECTORY)
1429 #define DEBUG_SUBDIRECTORY ".debug"
1432 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1433 where the original file resides (may not be the same as
1434 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1435 looking for. Returns the name of the debuginfo, of NULL. */
1438 find_separate_debug_file (const char *dir
,
1439 const char *canon_dir
,
1440 const char *debuglink
,
1441 unsigned long crc32
, struct objfile
*objfile
)
1446 VEC (char_ptr
) *debugdir_vec
;
1447 struct cleanup
*back_to
;
1450 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1452 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1453 i
= strlen (canon_dir
);
1455 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1457 + strlen (DEBUG_SUBDIRECTORY
)
1459 + strlen (debuglink
)
1462 /* First try in the same directory as the original file. */
1463 strcpy (debugfile
, dir
);
1464 strcat (debugfile
, debuglink
);
1466 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1469 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1470 strcpy (debugfile
, dir
);
1471 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1472 strcat (debugfile
, "/");
1473 strcat (debugfile
, debuglink
);
1475 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1478 /* Then try in the global debugfile directories.
1480 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1481 cause "/..." lookups. */
1483 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1484 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1486 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1488 strcpy (debugfile
, debugdir
);
1489 strcat (debugfile
, "/");
1490 strcat (debugfile
, dir
);
1491 strcat (debugfile
, debuglink
);
1493 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1496 /* If the file is in the sysroot, try using its base path in the
1497 global debugfile directory. */
1498 if (canon_dir
!= NULL
1499 && filename_ncmp (canon_dir
, gdb_sysroot
,
1500 strlen (gdb_sysroot
)) == 0
1501 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1503 strcpy (debugfile
, debugdir
);
1504 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1505 strcat (debugfile
, "/");
1506 strcat (debugfile
, debuglink
);
1508 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1513 do_cleanups (back_to
);
1518 /* Modify PATH to contain only "directory/" part of PATH.
1519 If there were no directory separators in PATH, PATH will be empty
1520 string on return. */
1523 terminate_after_last_dir_separator (char *path
)
1527 /* Strip off the final filename part, leaving the directory name,
1528 followed by a slash. The directory can be relative or absolute. */
1529 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1530 if (IS_DIR_SEPARATOR (path
[i
]))
1533 /* If I is -1 then no directory is present there and DIR will be "". */
1537 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1538 Returns pathname, or NULL. */
1541 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1544 char *dir
, *canon_dir
;
1546 unsigned long crc32
;
1547 struct cleanup
*cleanups
;
1549 debuglink
= get_debug_link_info (objfile
, &crc32
);
1551 if (debuglink
== NULL
)
1553 /* There's no separate debug info, hence there's no way we could
1554 load it => no warning. */
1558 cleanups
= make_cleanup (xfree
, debuglink
);
1559 dir
= xstrdup (objfile
->name
);
1560 make_cleanup (xfree
, dir
);
1561 terminate_after_last_dir_separator (dir
);
1562 canon_dir
= lrealpath (dir
);
1564 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1568 if (debugfile
== NULL
)
1571 /* For PR gdb/9538, try again with realpath (if different from the
1576 if (lstat (objfile
->name
, &st_buf
) == 0 && S_ISLNK(st_buf
.st_mode
))
1580 symlink_dir
= lrealpath (objfile
->name
);
1581 if (symlink_dir
!= NULL
)
1583 make_cleanup (xfree
, symlink_dir
);
1584 terminate_after_last_dir_separator (symlink_dir
);
1585 if (strcmp (dir
, symlink_dir
) != 0)
1587 /* Different directory, so try using it. */
1588 debugfile
= find_separate_debug_file (symlink_dir
,
1596 #endif /* HAVE_LSTAT */
1599 do_cleanups (cleanups
);
1604 /* This is the symbol-file command. Read the file, analyze its
1605 symbols, and add a struct symtab to a symtab list. The syntax of
1606 the command is rather bizarre:
1608 1. The function buildargv implements various quoting conventions
1609 which are undocumented and have little or nothing in common with
1610 the way things are quoted (or not quoted) elsewhere in GDB.
1612 2. Options are used, which are not generally used in GDB (perhaps
1613 "set mapped on", "set readnow on" would be better)
1615 3. The order of options matters, which is contrary to GNU
1616 conventions (because it is confusing and inconvenient). */
1619 symbol_file_command (char *args
, int from_tty
)
1625 symbol_file_clear (from_tty
);
1629 char **argv
= gdb_buildargv (args
);
1630 int flags
= OBJF_USERLOADED
;
1631 struct cleanup
*cleanups
;
1634 cleanups
= make_cleanup_freeargv (argv
);
1635 while (*argv
!= NULL
)
1637 if (strcmp (*argv
, "-readnow") == 0)
1638 flags
|= OBJF_READNOW
;
1639 else if (**argv
== '-')
1640 error (_("unknown option `%s'"), *argv
);
1643 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1651 error (_("no symbol file name was specified"));
1653 do_cleanups (cleanups
);
1657 /* Set the initial language.
1659 FIXME: A better solution would be to record the language in the
1660 psymtab when reading partial symbols, and then use it (if known) to
1661 set the language. This would be a win for formats that encode the
1662 language in an easily discoverable place, such as DWARF. For
1663 stabs, we can jump through hoops looking for specially named
1664 symbols or try to intuit the language from the specific type of
1665 stabs we find, but we can't do that until later when we read in
1669 set_initial_language (void)
1671 enum language lang
= language_unknown
;
1673 if (language_of_main
!= language_unknown
)
1674 lang
= language_of_main
;
1677 const char *filename
;
1679 filename
= find_main_filename ();
1680 if (filename
!= NULL
)
1681 lang
= deduce_language_from_filename (filename
);
1684 if (lang
== language_unknown
)
1686 /* Make C the default language */
1690 set_language (lang
);
1691 expected_language
= current_language
; /* Don't warn the user. */
1694 /* If NAME is a remote name open the file using remote protocol, otherwise
1695 open it normally. Returns a new reference to the BFD. On error,
1696 returns NULL with the BFD error set. */
1699 gdb_bfd_open_maybe_remote (const char *name
)
1703 if (remote_filename_p (name
))
1704 result
= remote_bfd_open (name
, gnutarget
);
1706 result
= gdb_bfd_openr (name
, gnutarget
);
1712 /* Open the file specified by NAME and hand it off to BFD for
1713 preliminary analysis. Return a newly initialized bfd *, which
1714 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1715 absolute). In case of trouble, error() is called. */
1718 symfile_bfd_open (char *name
)
1722 char *absolute_name
;
1724 if (remote_filename_p (name
))
1726 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1728 error (_("`%s': can't open to read symbols: %s."), name
,
1729 bfd_errmsg (bfd_get_error ()));
1731 if (!bfd_check_format (sym_bfd
, bfd_object
))
1733 make_cleanup_bfd_unref (sym_bfd
);
1734 error (_("`%s': can't read symbols: %s."), name
,
1735 bfd_errmsg (bfd_get_error ()));
1741 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1743 /* Look down path for it, allocate 2nd new malloc'd copy. */
1744 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1745 O_RDONLY
| O_BINARY
, &absolute_name
);
1746 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1749 char *exename
= alloca (strlen (name
) + 5);
1751 strcat (strcpy (exename
, name
), ".exe");
1752 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1753 O_RDONLY
| O_BINARY
, &absolute_name
);
1758 make_cleanup (xfree
, name
);
1759 perror_with_name (name
);
1763 name
= absolute_name
;
1764 make_cleanup (xfree
, name
);
1766 sym_bfd
= gdb_bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1769 make_cleanup (xfree
, name
);
1770 error (_("`%s': can't open to read symbols: %s."), name
,
1771 bfd_errmsg (bfd_get_error ()));
1773 bfd_set_cacheable (sym_bfd
, 1);
1775 if (!bfd_check_format (sym_bfd
, bfd_object
))
1777 make_cleanup_bfd_unref (sym_bfd
);
1778 error (_("`%s': can't read symbols: %s."), name
,
1779 bfd_errmsg (bfd_get_error ()));
1785 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1786 the section was not found. */
1789 get_section_index (struct objfile
*objfile
, char *section_name
)
1791 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1799 /* Link SF into the global symtab_fns list. Called on startup by the
1800 _initialize routine in each object file format reader, to register
1801 information about each format the reader is prepared to handle. */
1804 add_symtab_fns (const struct sym_fns
*sf
)
1806 VEC_safe_push (sym_fns_ptr
, symtab_fns
, sf
);
1809 /* Initialize OBJFILE to read symbols from its associated BFD. It
1810 either returns or calls error(). The result is an initialized
1811 struct sym_fns in the objfile structure, that contains cached
1812 information about the symbol file. */
1814 static const struct sym_fns
*
1815 find_sym_fns (bfd
*abfd
)
1817 const struct sym_fns
*sf
;
1818 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1821 if (our_flavour
== bfd_target_srec_flavour
1822 || our_flavour
== bfd_target_ihex_flavour
1823 || our_flavour
== bfd_target_tekhex_flavour
)
1824 return NULL
; /* No symbols. */
1826 for (i
= 0; VEC_iterate (sym_fns_ptr
, symtab_fns
, i
, sf
); ++i
)
1827 if (our_flavour
== sf
->sym_flavour
)
1830 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1831 bfd_get_target (abfd
));
1835 /* This function runs the load command of our current target. */
1838 load_command (char *arg
, int from_tty
)
1842 /* The user might be reloading because the binary has changed. Take
1843 this opportunity to check. */
1844 reopen_exec_file ();
1852 parg
= arg
= get_exec_file (1);
1854 /* Count how many \ " ' tab space there are in the name. */
1855 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1863 /* We need to quote this string so buildargv can pull it apart. */
1864 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1868 make_cleanup (xfree
, temp
);
1871 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1873 strncpy (ptemp
, prev
, parg
- prev
);
1874 ptemp
+= parg
- prev
;
1878 strcpy (ptemp
, prev
);
1884 target_load (arg
, from_tty
);
1886 /* After re-loading the executable, we don't really know which
1887 overlays are mapped any more. */
1888 overlay_cache_invalid
= 1;
1891 /* This version of "load" should be usable for any target. Currently
1892 it is just used for remote targets, not inftarg.c or core files,
1893 on the theory that only in that case is it useful.
1895 Avoiding xmodem and the like seems like a win (a) because we don't have
1896 to worry about finding it, and (b) On VMS, fork() is very slow and so
1897 we don't want to run a subprocess. On the other hand, I'm not sure how
1898 performance compares. */
1900 static int validate_download
= 0;
1902 /* Callback service function for generic_load (bfd_map_over_sections). */
1905 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1907 bfd_size_type
*sum
= data
;
1909 *sum
+= bfd_get_section_size (asec
);
1912 /* Opaque data for load_section_callback. */
1913 struct load_section_data
{
1914 unsigned long load_offset
;
1915 struct load_progress_data
*progress_data
;
1916 VEC(memory_write_request_s
) *requests
;
1919 /* Opaque data for load_progress. */
1920 struct load_progress_data
{
1921 /* Cumulative data. */
1922 unsigned long write_count
;
1923 unsigned long data_count
;
1924 bfd_size_type total_size
;
1927 /* Opaque data for load_progress for a single section. */
1928 struct load_progress_section_data
{
1929 struct load_progress_data
*cumulative
;
1931 /* Per-section data. */
1932 const char *section_name
;
1933 ULONGEST section_sent
;
1934 ULONGEST section_size
;
1939 /* Target write callback routine for progress reporting. */
1942 load_progress (ULONGEST bytes
, void *untyped_arg
)
1944 struct load_progress_section_data
*args
= untyped_arg
;
1945 struct load_progress_data
*totals
;
1948 /* Writing padding data. No easy way to get at the cumulative
1949 stats, so just ignore this. */
1952 totals
= args
->cumulative
;
1954 if (bytes
== 0 && args
->section_sent
== 0)
1956 /* The write is just starting. Let the user know we've started
1958 ui_out_message (current_uiout
, 0, "Loading section %s, size %s lma %s\n",
1959 args
->section_name
, hex_string (args
->section_size
),
1960 paddress (target_gdbarch
, args
->lma
));
1964 if (validate_download
)
1966 /* Broken memories and broken monitors manifest themselves here
1967 when bring new computers to life. This doubles already slow
1969 /* NOTE: cagney/1999-10-18: A more efficient implementation
1970 might add a verify_memory() method to the target vector and
1971 then use that. remote.c could implement that method using
1972 the ``qCRC'' packet. */
1973 gdb_byte
*check
= xmalloc (bytes
);
1974 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1976 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1977 error (_("Download verify read failed at %s"),
1978 paddress (target_gdbarch
, args
->lma
));
1979 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1980 error (_("Download verify compare failed at %s"),
1981 paddress (target_gdbarch
, args
->lma
));
1982 do_cleanups (verify_cleanups
);
1984 totals
->data_count
+= bytes
;
1986 args
->buffer
+= bytes
;
1987 totals
->write_count
+= 1;
1988 args
->section_sent
+= bytes
;
1990 || (deprecated_ui_load_progress_hook
!= NULL
1991 && deprecated_ui_load_progress_hook (args
->section_name
,
1992 args
->section_sent
)))
1993 error (_("Canceled the download"));
1995 if (deprecated_show_load_progress
!= NULL
)
1996 deprecated_show_load_progress (args
->section_name
,
2000 totals
->total_size
);
2003 /* Callback service function for generic_load (bfd_map_over_sections). */
2006 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
2008 struct memory_write_request
*new_request
;
2009 struct load_section_data
*args
= data
;
2010 struct load_progress_section_data
*section_data
;
2011 bfd_size_type size
= bfd_get_section_size (asec
);
2013 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
2015 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
2021 new_request
= VEC_safe_push (memory_write_request_s
,
2022 args
->requests
, NULL
);
2023 memset (new_request
, 0, sizeof (struct memory_write_request
));
2024 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
2025 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
2026 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
2028 new_request
->data
= xmalloc (size
);
2029 new_request
->baton
= section_data
;
2031 buffer
= new_request
->data
;
2033 section_data
->cumulative
= args
->progress_data
;
2034 section_data
->section_name
= sect_name
;
2035 section_data
->section_size
= size
;
2036 section_data
->lma
= new_request
->begin
;
2037 section_data
->buffer
= buffer
;
2039 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2042 /* Clean up an entire memory request vector, including load
2043 data and progress records. */
2046 clear_memory_write_data (void *arg
)
2048 VEC(memory_write_request_s
) **vec_p
= arg
;
2049 VEC(memory_write_request_s
) *vec
= *vec_p
;
2051 struct memory_write_request
*mr
;
2053 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2058 VEC_free (memory_write_request_s
, vec
);
2062 generic_load (char *args
, int from_tty
)
2065 struct timeval start_time
, end_time
;
2067 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2068 struct load_section_data cbdata
;
2069 struct load_progress_data total_progress
;
2070 struct ui_out
*uiout
= current_uiout
;
2075 memset (&cbdata
, 0, sizeof (cbdata
));
2076 memset (&total_progress
, 0, sizeof (total_progress
));
2077 cbdata
.progress_data
= &total_progress
;
2079 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2082 error_no_arg (_("file to load"));
2084 argv
= gdb_buildargv (args
);
2085 make_cleanup_freeargv (argv
);
2087 filename
= tilde_expand (argv
[0]);
2088 make_cleanup (xfree
, filename
);
2090 if (argv
[1] != NULL
)
2094 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
2096 /* If the last word was not a valid number then
2097 treat it as a file name with spaces in. */
2098 if (argv
[1] == endptr
)
2099 error (_("Invalid download offset:%s."), argv
[1]);
2101 if (argv
[2] != NULL
)
2102 error (_("Too many parameters."));
2105 /* Open the file for loading. */
2106 loadfile_bfd
= gdb_bfd_openr (filename
, gnutarget
);
2107 if (loadfile_bfd
== NULL
)
2109 perror_with_name (filename
);
2113 make_cleanup_bfd_unref (loadfile_bfd
);
2115 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2117 error (_("\"%s\" is not an object file: %s"), filename
,
2118 bfd_errmsg (bfd_get_error ()));
2121 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2122 (void *) &total_progress
.total_size
);
2124 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2126 gettimeofday (&start_time
, NULL
);
2128 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2129 load_progress
) != 0)
2130 error (_("Load failed"));
2132 gettimeofday (&end_time
, NULL
);
2134 entry
= bfd_get_start_address (loadfile_bfd
);
2135 ui_out_text (uiout
, "Start address ");
2136 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
2137 ui_out_text (uiout
, ", load size ");
2138 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2139 ui_out_text (uiout
, "\n");
2140 /* We were doing this in remote-mips.c, I suspect it is right
2141 for other targets too. */
2142 regcache_write_pc (get_current_regcache (), entry
);
2144 /* Reset breakpoints, now that we have changed the load image. For
2145 instance, breakpoints may have been set (or reset, by
2146 post_create_inferior) while connected to the target but before we
2147 loaded the program. In that case, the prologue analyzer could
2148 have read instructions from the target to find the right
2149 breakpoint locations. Loading has changed the contents of that
2152 breakpoint_re_set ();
2154 /* FIXME: are we supposed to call symbol_file_add or not? According
2155 to a comment from remote-mips.c (where a call to symbol_file_add
2156 was commented out), making the call confuses GDB if more than one
2157 file is loaded in. Some targets do (e.g., remote-vx.c) but
2158 others don't (or didn't - perhaps they have all been deleted). */
2160 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2161 total_progress
.write_count
,
2162 &start_time
, &end_time
);
2164 do_cleanups (old_cleanups
);
2167 /* Report how fast the transfer went. */
2169 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2170 replaced by print_transfer_performance (with a very different
2171 function signature). */
2174 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2177 struct timeval start
, end
;
2179 start
.tv_sec
= start_time
;
2181 end
.tv_sec
= end_time
;
2184 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2188 print_transfer_performance (struct ui_file
*stream
,
2189 unsigned long data_count
,
2190 unsigned long write_count
,
2191 const struct timeval
*start_time
,
2192 const struct timeval
*end_time
)
2194 ULONGEST time_count
;
2195 struct ui_out
*uiout
= current_uiout
;
2197 /* Compute the elapsed time in milliseconds, as a tradeoff between
2198 accuracy and overflow. */
2199 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2200 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2202 ui_out_text (uiout
, "Transfer rate: ");
2205 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2207 if (ui_out_is_mi_like_p (uiout
))
2209 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2210 ui_out_text (uiout
, " bits/sec");
2212 else if (rate
< 1024)
2214 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2215 ui_out_text (uiout
, " bytes/sec");
2219 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2220 ui_out_text (uiout
, " KB/sec");
2225 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2226 ui_out_text (uiout
, " bits in <1 sec");
2228 if (write_count
> 0)
2230 ui_out_text (uiout
, ", ");
2231 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2232 ui_out_text (uiout
, " bytes/write");
2234 ui_out_text (uiout
, ".\n");
2237 /* This function allows the addition of incrementally linked object files.
2238 It does not modify any state in the target, only in the debugger. */
2239 /* Note: ezannoni 2000-04-13 This function/command used to have a
2240 special case syntax for the rombug target (Rombug is the boot
2241 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2242 rombug case, the user doesn't need to supply a text address,
2243 instead a call to target_link() (in target.c) would supply the
2244 value to use. We are now discontinuing this type of ad hoc syntax. */
2247 add_symbol_file_command (char *args
, int from_tty
)
2249 struct gdbarch
*gdbarch
= get_current_arch ();
2250 char *filename
= NULL
;
2251 int flags
= OBJF_USERLOADED
;
2253 int section_index
= 0;
2257 int expecting_sec_name
= 0;
2258 int expecting_sec_addr
= 0;
2267 struct section_addr_info
*section_addrs
;
2268 struct sect_opt
*sect_opts
= NULL
;
2269 size_t num_sect_opts
= 0;
2270 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2273 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2274 * sizeof (struct sect_opt
));
2279 error (_("add-symbol-file takes a file name and an address"));
2281 argv
= gdb_buildargv (args
);
2282 make_cleanup_freeargv (argv
);
2284 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2286 /* Process the argument. */
2289 /* The first argument is the file name. */
2290 filename
= tilde_expand (arg
);
2291 make_cleanup (xfree
, filename
);
2296 /* The second argument is always the text address at which
2297 to load the program. */
2298 sect_opts
[section_index
].name
= ".text";
2299 sect_opts
[section_index
].value
= arg
;
2300 if (++section_index
>= num_sect_opts
)
2303 sect_opts
= ((struct sect_opt
*)
2304 xrealloc (sect_opts
,
2306 * sizeof (struct sect_opt
)));
2311 /* It's an option (starting with '-') or it's an argument
2316 if (strcmp (arg
, "-readnow") == 0)
2317 flags
|= OBJF_READNOW
;
2318 else if (strcmp (arg
, "-s") == 0)
2320 expecting_sec_name
= 1;
2321 expecting_sec_addr
= 1;
2326 if (expecting_sec_name
)
2328 sect_opts
[section_index
].name
= arg
;
2329 expecting_sec_name
= 0;
2332 if (expecting_sec_addr
)
2334 sect_opts
[section_index
].value
= arg
;
2335 expecting_sec_addr
= 0;
2336 if (++section_index
>= num_sect_opts
)
2339 sect_opts
= ((struct sect_opt
*)
2340 xrealloc (sect_opts
,
2342 * sizeof (struct sect_opt
)));
2346 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2347 " [-readnow] [-s <secname> <addr>]*"));
2352 /* This command takes at least two arguments. The first one is a
2353 filename, and the second is the address where this file has been
2354 loaded. Abort now if this address hasn't been provided by the
2356 if (section_index
< 1)
2357 error (_("The address where %s has been loaded is missing"), filename
);
2359 /* Print the prompt for the query below. And save the arguments into
2360 a sect_addr_info structure to be passed around to other
2361 functions. We have to split this up into separate print
2362 statements because hex_string returns a local static
2365 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2366 section_addrs
= alloc_section_addr_info (section_index
);
2367 make_cleanup (xfree
, section_addrs
);
2368 for (i
= 0; i
< section_index
; i
++)
2371 char *val
= sect_opts
[i
].value
;
2372 char *sec
= sect_opts
[i
].name
;
2374 addr
= parse_and_eval_address (val
);
2376 /* Here we store the section offsets in the order they were
2377 entered on the command line. */
2378 section_addrs
->other
[sec_num
].name
= sec
;
2379 section_addrs
->other
[sec_num
].addr
= addr
;
2380 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2381 paddress (gdbarch
, addr
));
2384 /* The object's sections are initialized when a
2385 call is made to build_objfile_section_table (objfile).
2386 This happens in reread_symbols.
2387 At this point, we don't know what file type this is,
2388 so we can't determine what section names are valid. */
2391 if (from_tty
&& (!query ("%s", "")))
2392 error (_("Not confirmed."));
2394 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2395 section_addrs
, flags
);
2397 /* Getting new symbols may change our opinion about what is
2399 reinit_frame_cache ();
2400 do_cleanups (my_cleanups
);
2404 typedef struct objfile
*objfilep
;
2406 DEF_VEC_P (objfilep
);
2408 /* Re-read symbols if a symbol-file has changed. */
2410 reread_symbols (void)
2412 struct objfile
*objfile
;
2414 struct stat new_statbuf
;
2416 VEC (objfilep
) *new_objfiles
= NULL
;
2417 struct cleanup
*all_cleanups
;
2419 all_cleanups
= make_cleanup (VEC_cleanup (objfilep
), &new_objfiles
);
2421 /* With the addition of shared libraries, this should be modified,
2422 the load time should be saved in the partial symbol tables, since
2423 different tables may come from different source files. FIXME.
2424 This routine should then walk down each partial symbol table
2425 and see if the symbol table that it originates from has been changed. */
2427 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2429 /* solib-sunos.c creates one objfile with obfd. */
2430 if (objfile
->obfd
== NULL
)
2433 /* Separate debug objfiles are handled in the main objfile. */
2434 if (objfile
->separate_debug_objfile_backlink
)
2437 /* If this object is from an archive (what you usually create with
2438 `ar', often called a `static library' on most systems, though
2439 a `shared library' on AIX is also an archive), then you should
2440 stat on the archive name, not member name. */
2441 if (objfile
->obfd
->my_archive
)
2442 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2444 res
= stat (objfile
->name
, &new_statbuf
);
2447 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2448 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2452 new_modtime
= new_statbuf
.st_mtime
;
2453 if (new_modtime
!= objfile
->mtime
)
2455 struct cleanup
*old_cleanups
;
2456 struct section_offsets
*offsets
;
2458 char *obfd_filename
;
2460 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2463 /* There are various functions like symbol_file_add,
2464 symfile_bfd_open, syms_from_objfile, etc., which might
2465 appear to do what we want. But they have various other
2466 effects which we *don't* want. So we just do stuff
2467 ourselves. We don't worry about mapped files (for one thing,
2468 any mapped file will be out of date). */
2470 /* If we get an error, blow away this objfile (not sure if
2471 that is the correct response for things like shared
2473 old_cleanups
= make_cleanup_free_objfile (objfile
);
2474 /* We need to do this whenever any symbols go away. */
2475 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2477 if (exec_bfd
!= NULL
2478 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2479 bfd_get_filename (exec_bfd
)) == 0)
2481 /* Reload EXEC_BFD without asking anything. */
2483 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2486 /* Keep the calls order approx. the same as in free_objfile. */
2488 /* Free the separate debug objfiles. It will be
2489 automatically recreated by sym_read. */
2490 free_objfile_separate_debug (objfile
);
2492 /* Remove any references to this objfile in the global
2494 preserve_values (objfile
);
2496 /* Nuke all the state that we will re-read. Much of the following
2497 code which sets things to NULL really is necessary to tell
2498 other parts of GDB that there is nothing currently there.
2500 Try to keep the freeing order compatible with free_objfile. */
2502 if (objfile
->sf
!= NULL
)
2504 (*objfile
->sf
->sym_finish
) (objfile
);
2507 clear_objfile_data (objfile
);
2509 /* Clean up any state BFD has sitting around. We don't need
2510 to close the descriptor but BFD lacks a way of closing the
2511 BFD without closing the descriptor. */
2513 struct bfd
*obfd
= objfile
->obfd
;
2515 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2516 /* Open the new BFD before freeing the old one, so that
2517 the filename remains live. */
2518 objfile
->obfd
= gdb_bfd_open_maybe_remote (obfd_filename
);
2519 gdb_bfd_unref (obfd
);
2522 if (objfile
->obfd
== NULL
)
2523 error (_("Can't open %s to read symbols."), objfile
->name
);
2524 /* bfd_openr sets cacheable to true, which is what we want. */
2525 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2526 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2527 bfd_errmsg (bfd_get_error ()));
2529 /* Save the offsets, we will nuke them with the rest of the
2531 num_offsets
= objfile
->num_sections
;
2532 offsets
= ((struct section_offsets
*)
2533 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2534 memcpy (offsets
, objfile
->section_offsets
,
2535 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2537 /* FIXME: Do we have to free a whole linked list, or is this
2539 if (objfile
->global_psymbols
.list
)
2540 xfree (objfile
->global_psymbols
.list
);
2541 memset (&objfile
->global_psymbols
, 0,
2542 sizeof (objfile
->global_psymbols
));
2543 if (objfile
->static_psymbols
.list
)
2544 xfree (objfile
->static_psymbols
.list
);
2545 memset (&objfile
->static_psymbols
, 0,
2546 sizeof (objfile
->static_psymbols
));
2548 /* Free the obstacks for non-reusable objfiles. */
2549 psymbol_bcache_free (objfile
->psymbol_cache
);
2550 objfile
->psymbol_cache
= psymbol_bcache_init ();
2551 bcache_xfree (objfile
->macro_cache
);
2552 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2553 bcache_xfree (objfile
->filename_cache
);
2554 objfile
->filename_cache
= bcache_xmalloc (NULL
,NULL
);
2555 if (objfile
->demangled_names_hash
!= NULL
)
2557 htab_delete (objfile
->demangled_names_hash
);
2558 objfile
->demangled_names_hash
= NULL
;
2560 obstack_free (&objfile
->objfile_obstack
, 0);
2561 objfile
->sections
= NULL
;
2562 objfile
->symtabs
= NULL
;
2563 objfile
->psymtabs
= NULL
;
2564 objfile
->psymtabs_addrmap
= NULL
;
2565 objfile
->free_psymtabs
= NULL
;
2566 objfile
->template_symbols
= NULL
;
2567 objfile
->msymbols
= NULL
;
2568 objfile
->deprecated_sym_private
= NULL
;
2569 objfile
->minimal_symbol_count
= 0;
2570 memset (&objfile
->msymbol_hash
, 0,
2571 sizeof (objfile
->msymbol_hash
));
2572 memset (&objfile
->msymbol_demangled_hash
, 0,
2573 sizeof (objfile
->msymbol_demangled_hash
));
2575 /* obstack_init also initializes the obstack so it is
2576 empty. We could use obstack_specify_allocation but
2577 gdb_obstack.h specifies the alloc/dealloc functions. */
2578 obstack_init (&objfile
->objfile_obstack
);
2579 build_objfile_section_table (objfile
);
2580 terminate_minimal_symbol_table (objfile
);
2582 /* We use the same section offsets as from last time. I'm not
2583 sure whether that is always correct for shared libraries. */
2584 objfile
->section_offsets
= (struct section_offsets
*)
2585 obstack_alloc (&objfile
->objfile_obstack
,
2586 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2587 memcpy (objfile
->section_offsets
, offsets
,
2588 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2589 objfile
->num_sections
= num_offsets
;
2591 /* What the hell is sym_new_init for, anyway? The concept of
2592 distinguishing between the main file and additional files
2593 in this way seems rather dubious. */
2594 if (objfile
== symfile_objfile
)
2596 (*objfile
->sf
->sym_new_init
) (objfile
);
2599 (*objfile
->sf
->sym_init
) (objfile
);
2600 clear_complaints (&symfile_complaints
, 1, 1);
2601 /* Do not set flags as this is safe and we don't want to be
2603 (*objfile
->sf
->sym_read
) (objfile
, 0);
2604 if ((objfile
->flags
& OBJF_PSYMTABS_READ
) != 0)
2606 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2607 require_partial_symbols (objfile
, 0);
2610 if (!objfile_has_symbols (objfile
))
2613 printf_unfiltered (_("(no debugging symbols found)\n"));
2617 /* We're done reading the symbol file; finish off complaints. */
2618 clear_complaints (&symfile_complaints
, 0, 1);
2620 /* Getting new symbols may change our opinion about what is
2623 reinit_frame_cache ();
2625 /* Discard cleanups as symbol reading was successful. */
2626 discard_cleanups (old_cleanups
);
2628 /* If the mtime has changed between the time we set new_modtime
2629 and now, we *want* this to be out of date, so don't call stat
2631 objfile
->mtime
= new_modtime
;
2632 init_entry_point_info (objfile
);
2634 VEC_safe_push (objfilep
, new_objfiles
, objfile
);
2642 /* Notify objfiles that we've modified objfile sections. */
2643 objfiles_changed ();
2645 clear_symtab_users (0);
2647 /* clear_objfile_data for each objfile was called before freeing it and
2648 observer_notify_new_objfile (NULL) has been called by
2649 clear_symtab_users above. Notify the new files now. */
2650 for (ix
= 0; VEC_iterate (objfilep
, new_objfiles
, ix
, objfile
); ix
++)
2651 observer_notify_new_objfile (objfile
);
2653 /* At least one objfile has changed, so we can consider that
2654 the executable we're debugging has changed too. */
2655 observer_notify_executable_changed ();
2658 do_cleanups (all_cleanups
);
2670 static filename_language
*filename_language_table
;
2671 static int fl_table_size
, fl_table_next
;
2674 add_filename_language (char *ext
, enum language lang
)
2676 if (fl_table_next
>= fl_table_size
)
2678 fl_table_size
+= 10;
2679 filename_language_table
=
2680 xrealloc (filename_language_table
,
2681 fl_table_size
* sizeof (*filename_language_table
));
2684 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2685 filename_language_table
[fl_table_next
].lang
= lang
;
2689 static char *ext_args
;
2691 show_ext_args (struct ui_file
*file
, int from_tty
,
2692 struct cmd_list_element
*c
, const char *value
)
2694 fprintf_filtered (file
,
2695 _("Mapping between filename extension "
2696 "and source language is \"%s\".\n"),
2701 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2704 char *cp
= ext_args
;
2707 /* First arg is filename extension, starting with '.' */
2709 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2711 /* Find end of first arg. */
2712 while (*cp
&& !isspace (*cp
))
2716 error (_("'%s': two arguments required -- "
2717 "filename extension and language"),
2720 /* Null-terminate first arg. */
2723 /* Find beginning of second arg, which should be a source language. */
2724 while (*cp
&& isspace (*cp
))
2728 error (_("'%s': two arguments required -- "
2729 "filename extension and language"),
2732 /* Lookup the language from among those we know. */
2733 lang
= language_enum (cp
);
2735 /* Now lookup the filename extension: do we already know it? */
2736 for (i
= 0; i
< fl_table_next
; i
++)
2737 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2740 if (i
>= fl_table_next
)
2742 /* New file extension. */
2743 add_filename_language (ext_args
, lang
);
2747 /* Redefining a previously known filename extension. */
2750 /* query ("Really make files of type %s '%s'?", */
2751 /* ext_args, language_str (lang)); */
2753 xfree (filename_language_table
[i
].ext
);
2754 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2755 filename_language_table
[i
].lang
= lang
;
2760 info_ext_lang_command (char *args
, int from_tty
)
2764 printf_filtered (_("Filename extensions and the languages they represent:"));
2765 printf_filtered ("\n\n");
2766 for (i
= 0; i
< fl_table_next
; i
++)
2767 printf_filtered ("\t%s\t- %s\n",
2768 filename_language_table
[i
].ext
,
2769 language_str (filename_language_table
[i
].lang
));
2773 init_filename_language_table (void)
2775 if (fl_table_size
== 0) /* Protect against repetition. */
2779 filename_language_table
=
2780 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2781 add_filename_language (".c", language_c
);
2782 add_filename_language (".d", language_d
);
2783 add_filename_language (".C", language_cplus
);
2784 add_filename_language (".cc", language_cplus
);
2785 add_filename_language (".cp", language_cplus
);
2786 add_filename_language (".cpp", language_cplus
);
2787 add_filename_language (".cxx", language_cplus
);
2788 add_filename_language (".c++", language_cplus
);
2789 add_filename_language (".java", language_java
);
2790 add_filename_language (".class", language_java
);
2791 add_filename_language (".m", language_objc
);
2792 add_filename_language (".f", language_fortran
);
2793 add_filename_language (".F", language_fortran
);
2794 add_filename_language (".for", language_fortran
);
2795 add_filename_language (".FOR", language_fortran
);
2796 add_filename_language (".ftn", language_fortran
);
2797 add_filename_language (".FTN", language_fortran
);
2798 add_filename_language (".fpp", language_fortran
);
2799 add_filename_language (".FPP", language_fortran
);
2800 add_filename_language (".f90", language_fortran
);
2801 add_filename_language (".F90", language_fortran
);
2802 add_filename_language (".f95", language_fortran
);
2803 add_filename_language (".F95", language_fortran
);
2804 add_filename_language (".f03", language_fortran
);
2805 add_filename_language (".F03", language_fortran
);
2806 add_filename_language (".f08", language_fortran
);
2807 add_filename_language (".F08", language_fortran
);
2808 add_filename_language (".s", language_asm
);
2809 add_filename_language (".sx", language_asm
);
2810 add_filename_language (".S", language_asm
);
2811 add_filename_language (".pas", language_pascal
);
2812 add_filename_language (".p", language_pascal
);
2813 add_filename_language (".pp", language_pascal
);
2814 add_filename_language (".adb", language_ada
);
2815 add_filename_language (".ads", language_ada
);
2816 add_filename_language (".a", language_ada
);
2817 add_filename_language (".ada", language_ada
);
2818 add_filename_language (".dg", language_ada
);
2823 deduce_language_from_filename (const char *filename
)
2828 if (filename
!= NULL
)
2829 if ((cp
= strrchr (filename
, '.')) != NULL
)
2830 for (i
= 0; i
< fl_table_next
; i
++)
2831 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2832 return filename_language_table
[i
].lang
;
2834 return language_unknown
;
2839 Allocate and partly initialize a new symbol table. Return a pointer
2840 to it. error() if no space.
2842 Caller must set these fields:
2851 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2853 struct symtab
*symtab
;
2855 symtab
= (struct symtab
*)
2856 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2857 memset (symtab
, 0, sizeof (*symtab
));
2858 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2859 objfile
->filename_cache
);
2860 symtab
->fullname
= NULL
;
2861 symtab
->language
= deduce_language_from_filename (filename
);
2862 symtab
->debugformat
= "unknown";
2864 /* Hook it to the objfile it comes from. */
2866 symtab
->objfile
= objfile
;
2867 symtab
->next
= objfile
->symtabs
;
2868 objfile
->symtabs
= symtab
;
2870 if (symtab_create_debug
)
2872 /* Be a bit clever with debugging messages, and don't print objfile
2873 every time, only when it changes. */
2874 static char *last_objfile_name
= NULL
;
2876 if (last_objfile_name
== NULL
2877 || strcmp (last_objfile_name
, objfile
->name
) != 0)
2879 xfree (last_objfile_name
);
2880 last_objfile_name
= xstrdup (objfile
->name
);
2881 fprintf_unfiltered (gdb_stdlog
,
2882 "Creating one or more symtabs for objfile %s ...\n",
2885 fprintf_unfiltered (gdb_stdlog
,
2886 "Created symtab %s for module %s.\n",
2887 host_address_to_string (symtab
), filename
);
2894 /* Reset all data structures in gdb which may contain references to symbol
2895 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2898 clear_symtab_users (int add_flags
)
2900 /* Someday, we should do better than this, by only blowing away
2901 the things that really need to be blown. */
2903 /* Clear the "current" symtab first, because it is no longer valid.
2904 breakpoint_re_set may try to access the current symtab. */
2905 clear_current_source_symtab_and_line ();
2908 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2909 breakpoint_re_set ();
2910 clear_last_displayed_sal ();
2911 clear_pc_function_cache ();
2912 observer_notify_new_objfile (NULL
);
2914 /* Clear globals which might have pointed into a removed objfile.
2915 FIXME: It's not clear which of these are supposed to persist
2916 between expressions and which ought to be reset each time. */
2917 expression_context_block
= NULL
;
2918 innermost_block
= NULL
;
2920 /* Varobj may refer to old symbols, perform a cleanup. */
2921 varobj_invalidate ();
2926 clear_symtab_users_cleanup (void *ignore
)
2928 clear_symtab_users (0);
2932 The following code implements an abstraction for debugging overlay sections.
2934 The target model is as follows:
2935 1) The gnu linker will permit multiple sections to be mapped into the
2936 same VMA, each with its own unique LMA (or load address).
2937 2) It is assumed that some runtime mechanism exists for mapping the
2938 sections, one by one, from the load address into the VMA address.
2939 3) This code provides a mechanism for gdb to keep track of which
2940 sections should be considered to be mapped from the VMA to the LMA.
2941 This information is used for symbol lookup, and memory read/write.
2942 For instance, if a section has been mapped then its contents
2943 should be read from the VMA, otherwise from the LMA.
2945 Two levels of debugger support for overlays are available. One is
2946 "manual", in which the debugger relies on the user to tell it which
2947 overlays are currently mapped. This level of support is
2948 implemented entirely in the core debugger, and the information about
2949 whether a section is mapped is kept in the objfile->obj_section table.
2951 The second level of support is "automatic", and is only available if
2952 the target-specific code provides functionality to read the target's
2953 overlay mapping table, and translate its contents for the debugger
2954 (by updating the mapped state information in the obj_section tables).
2956 The interface is as follows:
2958 overlay map <name> -- tell gdb to consider this section mapped
2959 overlay unmap <name> -- tell gdb to consider this section unmapped
2960 overlay list -- list the sections that GDB thinks are mapped
2961 overlay read-target -- get the target's state of what's mapped
2962 overlay off/manual/auto -- set overlay debugging state
2963 Functional interface:
2964 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2965 section, return that section.
2966 find_pc_overlay(pc): find any overlay section that contains
2967 the pc, either in its VMA or its LMA
2968 section_is_mapped(sect): true if overlay is marked as mapped
2969 section_is_overlay(sect): true if section's VMA != LMA
2970 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2971 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2972 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2973 overlay_mapped_address(...): map an address from section's LMA to VMA
2974 overlay_unmapped_address(...): map an address from section's VMA to LMA
2975 symbol_overlayed_address(...): Return a "current" address for symbol:
2976 either in VMA or LMA depending on whether
2977 the symbol's section is currently mapped. */
2979 /* Overlay debugging state: */
2981 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2982 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2984 /* Function: section_is_overlay (SECTION)
2985 Returns true if SECTION has VMA not equal to LMA, ie.
2986 SECTION is loaded at an address different from where it will "run". */
2989 section_is_overlay (struct obj_section
*section
)
2991 if (overlay_debugging
&& section
)
2993 bfd
*abfd
= section
->objfile
->obfd
;
2994 asection
*bfd_section
= section
->the_bfd_section
;
2996 if (bfd_section_lma (abfd
, bfd_section
) != 0
2997 && bfd_section_lma (abfd
, bfd_section
)
2998 != bfd_section_vma (abfd
, bfd_section
))
3005 /* Function: overlay_invalidate_all (void)
3006 Invalidate the mapped state of all overlay sections (mark it as stale). */
3009 overlay_invalidate_all (void)
3011 struct objfile
*objfile
;
3012 struct obj_section
*sect
;
3014 ALL_OBJSECTIONS (objfile
, sect
)
3015 if (section_is_overlay (sect
))
3016 sect
->ovly_mapped
= -1;
3019 /* Function: section_is_mapped (SECTION)
3020 Returns true if section is an overlay, and is currently mapped.
3022 Access to the ovly_mapped flag is restricted to this function, so
3023 that we can do automatic update. If the global flag
3024 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3025 overlay_invalidate_all. If the mapped state of the particular
3026 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3029 section_is_mapped (struct obj_section
*osect
)
3031 struct gdbarch
*gdbarch
;
3033 if (osect
== 0 || !section_is_overlay (osect
))
3036 switch (overlay_debugging
)
3040 return 0; /* overlay debugging off */
3041 case ovly_auto
: /* overlay debugging automatic */
3042 /* Unles there is a gdbarch_overlay_update function,
3043 there's really nothing useful to do here (can't really go auto). */
3044 gdbarch
= get_objfile_arch (osect
->objfile
);
3045 if (gdbarch_overlay_update_p (gdbarch
))
3047 if (overlay_cache_invalid
)
3049 overlay_invalidate_all ();
3050 overlay_cache_invalid
= 0;
3052 if (osect
->ovly_mapped
== -1)
3053 gdbarch_overlay_update (gdbarch
, osect
);
3055 /* fall thru to manual case */
3056 case ovly_on
: /* overlay debugging manual */
3057 return osect
->ovly_mapped
== 1;
3061 /* Function: pc_in_unmapped_range
3062 If PC falls into the lma range of SECTION, return true, else false. */
3065 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3067 if (section_is_overlay (section
))
3069 bfd
*abfd
= section
->objfile
->obfd
;
3070 asection
*bfd_section
= section
->the_bfd_section
;
3072 /* We assume the LMA is relocated by the same offset as the VMA. */
3073 bfd_vma size
= bfd_get_section_size (bfd_section
);
3074 CORE_ADDR offset
= obj_section_offset (section
);
3076 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3077 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3084 /* Function: pc_in_mapped_range
3085 If PC falls into the vma range of SECTION, return true, else false. */
3088 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3090 if (section_is_overlay (section
))
3092 if (obj_section_addr (section
) <= pc
3093 && pc
< obj_section_endaddr (section
))
3101 /* Return true if the mapped ranges of sections A and B overlap, false
3104 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3106 CORE_ADDR a_start
= obj_section_addr (a
);
3107 CORE_ADDR a_end
= obj_section_endaddr (a
);
3108 CORE_ADDR b_start
= obj_section_addr (b
);
3109 CORE_ADDR b_end
= obj_section_endaddr (b
);
3111 return (a_start
< b_end
&& b_start
< a_end
);
3114 /* Function: overlay_unmapped_address (PC, SECTION)
3115 Returns the address corresponding to PC in the unmapped (load) range.
3116 May be the same as PC. */
3119 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3121 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3123 bfd
*abfd
= section
->objfile
->obfd
;
3124 asection
*bfd_section
= section
->the_bfd_section
;
3126 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3127 - bfd_section_vma (abfd
, bfd_section
);
3133 /* Function: overlay_mapped_address (PC, SECTION)
3134 Returns the address corresponding to PC in the mapped (runtime) range.
3135 May be the same as PC. */
3138 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3140 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3142 bfd
*abfd
= section
->objfile
->obfd
;
3143 asection
*bfd_section
= section
->the_bfd_section
;
3145 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3146 - bfd_section_lma (abfd
, bfd_section
);
3153 /* Function: symbol_overlayed_address
3154 Return one of two addresses (relative to the VMA or to the LMA),
3155 depending on whether the section is mapped or not. */
3158 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3160 if (overlay_debugging
)
3162 /* If the symbol has no section, just return its regular address. */
3165 /* If the symbol's section is not an overlay, just return its
3167 if (!section_is_overlay (section
))
3169 /* If the symbol's section is mapped, just return its address. */
3170 if (section_is_mapped (section
))
3173 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3174 * then return its LOADED address rather than its vma address!!
3176 return overlay_unmapped_address (address
, section
);
3181 /* Function: find_pc_overlay (PC)
3182 Return the best-match overlay section for PC:
3183 If PC matches a mapped overlay section's VMA, return that section.
3184 Else if PC matches an unmapped section's VMA, return that section.
3185 Else if PC matches an unmapped section's LMA, return that section. */
3187 struct obj_section
*
3188 find_pc_overlay (CORE_ADDR pc
)
3190 struct objfile
*objfile
;
3191 struct obj_section
*osect
, *best_match
= NULL
;
3193 if (overlay_debugging
)
3194 ALL_OBJSECTIONS (objfile
, osect
)
3195 if (section_is_overlay (osect
))
3197 if (pc_in_mapped_range (pc
, osect
))
3199 if (section_is_mapped (osect
))
3204 else if (pc_in_unmapped_range (pc
, osect
))
3210 /* Function: find_pc_mapped_section (PC)
3211 If PC falls into the VMA address range of an overlay section that is
3212 currently marked as MAPPED, return that section. Else return NULL. */
3214 struct obj_section
*
3215 find_pc_mapped_section (CORE_ADDR pc
)
3217 struct objfile
*objfile
;
3218 struct obj_section
*osect
;
3220 if (overlay_debugging
)
3221 ALL_OBJSECTIONS (objfile
, osect
)
3222 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3228 /* Function: list_overlays_command
3229 Print a list of mapped sections and their PC ranges. */
3232 list_overlays_command (char *args
, int from_tty
)
3235 struct objfile
*objfile
;
3236 struct obj_section
*osect
;
3238 if (overlay_debugging
)
3239 ALL_OBJSECTIONS (objfile
, osect
)
3240 if (section_is_mapped (osect
))
3242 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3247 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3248 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3249 size
= bfd_get_section_size (osect
->the_bfd_section
);
3250 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3252 printf_filtered ("Section %s, loaded at ", name
);
3253 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3254 puts_filtered (" - ");
3255 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3256 printf_filtered (", mapped at ");
3257 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3258 puts_filtered (" - ");
3259 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3260 puts_filtered ("\n");
3265 printf_filtered (_("No sections are mapped.\n"));
3268 /* Function: map_overlay_command
3269 Mark the named section as mapped (ie. residing at its VMA address). */
3272 map_overlay_command (char *args
, int from_tty
)
3274 struct objfile
*objfile
, *objfile2
;
3275 struct obj_section
*sec
, *sec2
;
3277 if (!overlay_debugging
)
3278 error (_("Overlay debugging not enabled. Use "
3279 "either the 'overlay auto' or\n"
3280 "the 'overlay manual' command."));
3282 if (args
== 0 || *args
== 0)
3283 error (_("Argument required: name of an overlay section"));
3285 /* First, find a section matching the user supplied argument. */
3286 ALL_OBJSECTIONS (objfile
, sec
)
3287 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3289 /* Now, check to see if the section is an overlay. */
3290 if (!section_is_overlay (sec
))
3291 continue; /* not an overlay section */
3293 /* Mark the overlay as "mapped". */
3294 sec
->ovly_mapped
= 1;
3296 /* Next, make a pass and unmap any sections that are
3297 overlapped by this new section: */
3298 ALL_OBJSECTIONS (objfile2
, sec2
)
3299 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3302 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3303 bfd_section_name (objfile
->obfd
,
3304 sec2
->the_bfd_section
));
3305 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3309 error (_("No overlay section called %s"), args
);
3312 /* Function: unmap_overlay_command
3313 Mark the overlay section as unmapped
3314 (ie. resident in its LMA address range, rather than the VMA range). */
3317 unmap_overlay_command (char *args
, int from_tty
)
3319 struct objfile
*objfile
;
3320 struct obj_section
*sec
;
3322 if (!overlay_debugging
)
3323 error (_("Overlay debugging not enabled. "
3324 "Use either the 'overlay auto' or\n"
3325 "the 'overlay manual' command."));
3327 if (args
== 0 || *args
== 0)
3328 error (_("Argument required: name of an overlay section"));
3330 /* First, find a section matching the user supplied argument. */
3331 ALL_OBJSECTIONS (objfile
, sec
)
3332 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3334 if (!sec
->ovly_mapped
)
3335 error (_("Section %s is not mapped"), args
);
3336 sec
->ovly_mapped
= 0;
3339 error (_("No overlay section called %s"), args
);
3342 /* Function: overlay_auto_command
3343 A utility command to turn on overlay debugging.
3344 Possibly this should be done via a set/show command. */
3347 overlay_auto_command (char *args
, int from_tty
)
3349 overlay_debugging
= ovly_auto
;
3350 enable_overlay_breakpoints ();
3352 printf_unfiltered (_("Automatic overlay debugging enabled."));
3355 /* Function: overlay_manual_command
3356 A utility command to turn on overlay debugging.
3357 Possibly this should be done via a set/show command. */
3360 overlay_manual_command (char *args
, int from_tty
)
3362 overlay_debugging
= ovly_on
;
3363 disable_overlay_breakpoints ();
3365 printf_unfiltered (_("Overlay debugging enabled."));
3368 /* Function: overlay_off_command
3369 A utility command to turn on overlay debugging.
3370 Possibly this should be done via a set/show command. */
3373 overlay_off_command (char *args
, int from_tty
)
3375 overlay_debugging
= ovly_off
;
3376 disable_overlay_breakpoints ();
3378 printf_unfiltered (_("Overlay debugging disabled."));
3382 overlay_load_command (char *args
, int from_tty
)
3384 struct gdbarch
*gdbarch
= get_current_arch ();
3386 if (gdbarch_overlay_update_p (gdbarch
))
3387 gdbarch_overlay_update (gdbarch
, NULL
);
3389 error (_("This target does not know how to read its overlay state."));
3392 /* Function: overlay_command
3393 A place-holder for a mis-typed command. */
3395 /* Command list chain containing all defined "overlay" subcommands. */
3396 static struct cmd_list_element
*overlaylist
;
3399 overlay_command (char *args
, int from_tty
)
3402 ("\"overlay\" must be followed by the name of an overlay command.\n");
3403 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3407 /* Target Overlays for the "Simplest" overlay manager:
3409 This is GDB's default target overlay layer. It works with the
3410 minimal overlay manager supplied as an example by Cygnus. The
3411 entry point is via a function pointer "gdbarch_overlay_update",
3412 so targets that use a different runtime overlay manager can
3413 substitute their own overlay_update function and take over the
3416 The overlay_update function pokes around in the target's data structures
3417 to see what overlays are mapped, and updates GDB's overlay mapping with
3420 In this simple implementation, the target data structures are as follows:
3421 unsigned _novlys; /# number of overlay sections #/
3422 unsigned _ovly_table[_novlys][4] = {
3423 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3424 {..., ..., ..., ...},
3426 unsigned _novly_regions; /# number of overlay regions #/
3427 unsigned _ovly_region_table[_novly_regions][3] = {
3428 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3431 These functions will attempt to update GDB's mappedness state in the
3432 symbol section table, based on the target's mappedness state.
3434 To do this, we keep a cached copy of the target's _ovly_table, and
3435 attempt to detect when the cached copy is invalidated. The main
3436 entry point is "simple_overlay_update(SECT), which looks up SECT in
3437 the cached table and re-reads only the entry for that section from
3438 the target (whenever possible). */
3440 /* Cached, dynamically allocated copies of the target data structures: */
3441 static unsigned (*cache_ovly_table
)[4] = 0;
3442 static unsigned cache_novlys
= 0;
3443 static CORE_ADDR cache_ovly_table_base
= 0;
3446 VMA
, SIZE
, LMA
, MAPPED
3449 /* Throw away the cached copy of _ovly_table. */
3451 simple_free_overlay_table (void)
3453 if (cache_ovly_table
)
3454 xfree (cache_ovly_table
);
3456 cache_ovly_table
= NULL
;
3457 cache_ovly_table_base
= 0;
3460 /* Read an array of ints of size SIZE from the target into a local buffer.
3461 Convert to host order. int LEN is number of ints. */
3463 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3464 int len
, int size
, enum bfd_endian byte_order
)
3466 /* FIXME (alloca): Not safe if array is very large. */
3467 gdb_byte
*buf
= alloca (len
* size
);
3470 read_memory (memaddr
, buf
, len
* size
);
3471 for (i
= 0; i
< len
; i
++)
3472 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3475 /* Find and grab a copy of the target _ovly_table
3476 (and _novlys, which is needed for the table's size). */
3478 simple_read_overlay_table (void)
3480 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3481 struct gdbarch
*gdbarch
;
3483 enum bfd_endian byte_order
;
3485 simple_free_overlay_table ();
3486 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3489 error (_("Error reading inferior's overlay table: "
3490 "couldn't find `_novlys' variable\n"
3491 "in inferior. Use `overlay manual' mode."));
3495 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3496 if (! ovly_table_msym
)
3498 error (_("Error reading inferior's overlay table: couldn't find "
3499 "`_ovly_table' array\n"
3500 "in inferior. Use `overlay manual' mode."));
3504 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3505 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3506 byte_order
= gdbarch_byte_order (gdbarch
);
3508 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3511 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3512 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3513 read_target_long_array (cache_ovly_table_base
,
3514 (unsigned int *) cache_ovly_table
,
3515 cache_novlys
* 4, word_size
, byte_order
);
3517 return 1; /* SUCCESS */
3520 /* Function: simple_overlay_update_1
3521 A helper function for simple_overlay_update. Assuming a cached copy
3522 of _ovly_table exists, look through it to find an entry whose vma,
3523 lma and size match those of OSECT. Re-read the entry and make sure
3524 it still matches OSECT (else the table may no longer be valid).
3525 Set OSECT's mapped state to match the entry. Return: 1 for
3526 success, 0 for failure. */
3529 simple_overlay_update_1 (struct obj_section
*osect
)
3532 bfd
*obfd
= osect
->objfile
->obfd
;
3533 asection
*bsect
= osect
->the_bfd_section
;
3534 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3535 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3536 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3538 size
= bfd_get_section_size (osect
->the_bfd_section
);
3539 for (i
= 0; i
< cache_novlys
; i
++)
3540 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3541 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3542 /* && cache_ovly_table[i][SIZE] == size */ )
3544 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3545 (unsigned int *) cache_ovly_table
[i
],
3546 4, word_size
, byte_order
);
3547 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3548 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3549 /* && cache_ovly_table[i][SIZE] == size */ )
3551 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3554 else /* Warning! Warning! Target's ovly table has changed! */
3560 /* Function: simple_overlay_update
3561 If OSECT is NULL, then update all sections' mapped state
3562 (after re-reading the entire target _ovly_table).
3563 If OSECT is non-NULL, then try to find a matching entry in the
3564 cached ovly_table and update only OSECT's mapped state.
3565 If a cached entry can't be found or the cache isn't valid, then
3566 re-read the entire cache, and go ahead and update all sections. */
3569 simple_overlay_update (struct obj_section
*osect
)
3571 struct objfile
*objfile
;
3573 /* Were we given an osect to look up? NULL means do all of them. */
3575 /* Have we got a cached copy of the target's overlay table? */
3576 if (cache_ovly_table
!= NULL
)
3578 /* Does its cached location match what's currently in the
3580 struct minimal_symbol
*minsym
3581 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3584 error (_("Error reading inferior's overlay table: couldn't "
3585 "find `_ovly_table' array\n"
3586 "in inferior. Use `overlay manual' mode."));
3588 if (cache_ovly_table_base
== SYMBOL_VALUE_ADDRESS (minsym
))
3589 /* Then go ahead and try to look up this single section in
3591 if (simple_overlay_update_1 (osect
))
3592 /* Found it! We're done. */
3596 /* Cached table no good: need to read the entire table anew.
3597 Or else we want all the sections, in which case it's actually
3598 more efficient to read the whole table in one block anyway. */
3600 if (! simple_read_overlay_table ())
3603 /* Now may as well update all sections, even if only one was requested. */
3604 ALL_OBJSECTIONS (objfile
, osect
)
3605 if (section_is_overlay (osect
))
3608 bfd
*obfd
= osect
->objfile
->obfd
;
3609 asection
*bsect
= osect
->the_bfd_section
;
3611 size
= bfd_get_section_size (bsect
);
3612 for (i
= 0; i
< cache_novlys
; i
++)
3613 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3614 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3615 /* && cache_ovly_table[i][SIZE] == size */ )
3616 { /* obj_section matches i'th entry in ovly_table. */
3617 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3618 break; /* finished with inner for loop: break out. */
3623 /* Set the output sections and output offsets for section SECTP in
3624 ABFD. The relocation code in BFD will read these offsets, so we
3625 need to be sure they're initialized. We map each section to itself,
3626 with no offset; this means that SECTP->vma will be honored. */
3629 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3631 sectp
->output_section
= sectp
;
3632 sectp
->output_offset
= 0;
3635 /* Default implementation for sym_relocate. */
3639 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3642 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3644 bfd
*abfd
= sectp
->owner
;
3646 /* We're only interested in sections with relocation
3648 if ((sectp
->flags
& SEC_RELOC
) == 0)
3651 /* We will handle section offsets properly elsewhere, so relocate as if
3652 all sections begin at 0. */
3653 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3655 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3658 /* Relocate the contents of a debug section SECTP in ABFD. The
3659 contents are stored in BUF if it is non-NULL, or returned in a
3660 malloc'd buffer otherwise.
3662 For some platforms and debug info formats, shared libraries contain
3663 relocations against the debug sections (particularly for DWARF-2;
3664 one affected platform is PowerPC GNU/Linux, although it depends on
3665 the version of the linker in use). Also, ELF object files naturally
3666 have unresolved relocations for their debug sections. We need to apply
3667 the relocations in order to get the locations of symbols correct.
3668 Another example that may require relocation processing, is the
3669 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3673 symfile_relocate_debug_section (struct objfile
*objfile
,
3674 asection
*sectp
, bfd_byte
*buf
)
3676 gdb_assert (objfile
->sf
->sym_relocate
);
3678 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3681 struct symfile_segment_data
*
3682 get_symfile_segment_data (bfd
*abfd
)
3684 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3689 return sf
->sym_segments (abfd
);
3693 free_symfile_segment_data (struct symfile_segment_data
*data
)
3695 xfree (data
->segment_bases
);
3696 xfree (data
->segment_sizes
);
3697 xfree (data
->segment_info
);
3703 - DATA, containing segment addresses from the object file ABFD, and
3704 the mapping from ABFD's sections onto the segments that own them,
3706 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3707 segment addresses reported by the target,
3708 store the appropriate offsets for each section in OFFSETS.
3710 If there are fewer entries in SEGMENT_BASES than there are segments
3711 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3713 If there are more entries, then ignore the extra. The target may
3714 not be able to distinguish between an empty data segment and a
3715 missing data segment; a missing text segment is less plausible. */
3717 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3718 struct section_offsets
*offsets
,
3719 int num_segment_bases
,
3720 const CORE_ADDR
*segment_bases
)
3725 /* It doesn't make sense to call this function unless you have some
3726 segment base addresses. */
3727 gdb_assert (num_segment_bases
> 0);
3729 /* If we do not have segment mappings for the object file, we
3730 can not relocate it by segments. */
3731 gdb_assert (data
!= NULL
);
3732 gdb_assert (data
->num_segments
> 0);
3734 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3736 int which
= data
->segment_info
[i
];
3738 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3740 /* Don't bother computing offsets for sections that aren't
3741 loaded as part of any segment. */
3745 /* Use the last SEGMENT_BASES entry as the address of any extra
3746 segments mentioned in DATA->segment_info. */
3747 if (which
> num_segment_bases
)
3748 which
= num_segment_bases
;
3750 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3751 - data
->segment_bases
[which
- 1]);
3758 symfile_find_segment_sections (struct objfile
*objfile
)
3760 bfd
*abfd
= objfile
->obfd
;
3763 struct symfile_segment_data
*data
;
3765 data
= get_symfile_segment_data (objfile
->obfd
);
3769 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3771 free_symfile_segment_data (data
);
3775 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3777 int which
= data
->segment_info
[i
];
3781 if (objfile
->sect_index_text
== -1)
3782 objfile
->sect_index_text
= sect
->index
;
3784 if (objfile
->sect_index_rodata
== -1)
3785 objfile
->sect_index_rodata
= sect
->index
;
3787 else if (which
== 2)
3789 if (objfile
->sect_index_data
== -1)
3790 objfile
->sect_index_data
= sect
->index
;
3792 if (objfile
->sect_index_bss
== -1)
3793 objfile
->sect_index_bss
= sect
->index
;
3797 free_symfile_segment_data (data
);
3801 _initialize_symfile (void)
3803 struct cmd_list_element
*c
;
3805 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3806 Load symbol table from executable file FILE.\n\
3807 The `file' command can also load symbol tables, as well as setting the file\n\
3808 to execute."), &cmdlist
);
3809 set_cmd_completer (c
, filename_completer
);
3811 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3812 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3813 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3814 ...]\nADDR is the starting address of the file's text.\n\
3815 The optional arguments are section-name section-address pairs and\n\
3816 should be specified if the data and bss segments are not contiguous\n\
3817 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3819 set_cmd_completer (c
, filename_completer
);
3821 c
= add_cmd ("load", class_files
, load_command
, _("\
3822 Dynamically load FILE into the running program, and record its symbols\n\
3823 for access from GDB.\n\
3824 A load OFFSET may also be given."), &cmdlist
);
3825 set_cmd_completer (c
, filename_completer
);
3827 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3828 _("Commands for debugging overlays."), &overlaylist
,
3829 "overlay ", 0, &cmdlist
);
3831 add_com_alias ("ovly", "overlay", class_alias
, 1);
3832 add_com_alias ("ov", "overlay", class_alias
, 1);
3834 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3835 _("Assert that an overlay section is mapped."), &overlaylist
);
3837 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3838 _("Assert that an overlay section is unmapped."), &overlaylist
);
3840 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3841 _("List mappings of overlay sections."), &overlaylist
);
3843 add_cmd ("manual", class_support
, overlay_manual_command
,
3844 _("Enable overlay debugging."), &overlaylist
);
3845 add_cmd ("off", class_support
, overlay_off_command
,
3846 _("Disable overlay debugging."), &overlaylist
);
3847 add_cmd ("auto", class_support
, overlay_auto_command
,
3848 _("Enable automatic overlay debugging."), &overlaylist
);
3849 add_cmd ("load-target", class_support
, overlay_load_command
,
3850 _("Read the overlay mapping state from the target."), &overlaylist
);
3852 /* Filename extension to source language lookup table: */
3853 init_filename_language_table ();
3854 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3856 Set mapping between filename extension and source language."), _("\
3857 Show mapping between filename extension and source language."), _("\
3858 Usage: set extension-language .foo bar"),
3859 set_ext_lang_command
,
3861 &setlist
, &showlist
);
3863 add_info ("extensions", info_ext_lang_command
,
3864 _("All filename extensions associated with a source language."));
3866 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3867 &debug_file_directory
, _("\
3868 Set the directories where separate debug symbols are searched for."), _("\
3869 Show the directories where separate debug symbols are searched for."), _("\
3870 Separate debug symbols are first searched for in the same\n\
3871 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3872 and lastly at the path of the directory of the binary with\n\
3873 each global debug-file-directory component prepended."),
3875 show_debug_file_directory
,
3876 &setlist
, &showlist
);