1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2013 Free Software Foundation, Inc.
5 Contributed by Cygnus Support, using pieces from other GDB modules.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "arch-utils.h"
35 #include "breakpoint.h"
37 #include "complaints.h"
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
47 #include "readline/readline.h"
48 #include "gdb_assert.h"
52 #include "parser-defs.h"
59 #include "cli/cli-utils.h"
61 #include <sys/types.h>
63 #include "gdb_string.h"
71 int (*deprecated_ui_load_progress_hook
) (const char *section
,
73 void (*deprecated_show_load_progress
) (const char *section
,
74 unsigned long section_sent
,
75 unsigned long section_size
,
76 unsigned long total_sent
,
77 unsigned long total_size
);
78 void (*deprecated_pre_add_symbol_hook
) (const char *);
79 void (*deprecated_post_add_symbol_hook
) (void);
81 static void clear_symtab_users_cleanup (void *ignore
);
83 /* Global variables owned by this file. */
84 int readnow_symbol_files
; /* Read full symbols immediately. */
86 /* Functions this file defines. */
88 static void load_command (char *, int);
90 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
92 static void add_symbol_file_command (char *, int);
94 bfd
*symfile_bfd_open (char *);
96 int get_section_index (struct objfile
*, char *);
98 static const struct sym_fns
*find_sym_fns (bfd
*);
100 static void decrement_reading_symtab (void *);
102 static void overlay_invalidate_all (void);
104 static void overlay_auto_command (char *, int);
106 static void overlay_manual_command (char *, int);
108 static void overlay_off_command (char *, int);
110 static void overlay_load_command (char *, int);
112 static void overlay_command (char *, int);
114 static void simple_free_overlay_table (void);
116 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
119 static int simple_read_overlay_table (void);
121 static int simple_overlay_update_1 (struct obj_section
*);
123 static void add_filename_language (char *ext
, enum language lang
);
125 static void info_ext_lang_command (char *args
, int from_tty
);
127 static void init_filename_language_table (void);
129 static void symfile_find_segment_sections (struct objfile
*objfile
);
131 void _initialize_symfile (void);
133 /* List of all available sym_fns. On gdb startup, each object file reader
134 calls add_symtab_fns() to register information on each format it is
137 typedef const struct sym_fns
*sym_fns_ptr
;
138 DEF_VEC_P (sym_fns_ptr
);
140 static VEC (sym_fns_ptr
) *symtab_fns
= NULL
;
142 /* If non-zero, shared library symbols will be added automatically
143 when the inferior is created, new libraries are loaded, or when
144 attaching to the inferior. This is almost always what users will
145 want to have happen; but for very large programs, the startup time
146 will be excessive, and so if this is a problem, the user can clear
147 this flag and then add the shared library symbols as needed. Note
148 that there is a potential for confusion, since if the shared
149 library symbols are not loaded, commands like "info fun" will *not*
150 report all the functions that are actually present. */
152 int auto_solib_add
= 1;
155 /* True if we are reading a symbol table. */
157 int currently_reading_symtab
= 0;
160 decrement_reading_symtab (void *dummy
)
162 currently_reading_symtab
--;
165 /* Increment currently_reading_symtab and return a cleanup that can be
166 used to decrement it. */
168 increment_reading_symtab (void)
170 ++currently_reading_symtab
;
171 return make_cleanup (decrement_reading_symtab
, NULL
);
174 /* Remember the lowest-addressed loadable section we've seen.
175 This function is called via bfd_map_over_sections.
177 In case of equal vmas, the section with the largest size becomes the
178 lowest-addressed loadable section.
180 If the vmas and sizes are equal, the last section is considered the
181 lowest-addressed loadable section. */
184 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
186 asection
**lowest
= (asection
**) obj
;
188 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
191 *lowest
= sect
; /* First loadable section */
192 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
193 *lowest
= sect
; /* A lower loadable section */
194 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
195 && (bfd_section_size (abfd
, (*lowest
))
196 <= bfd_section_size (abfd
, sect
)))
200 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
202 struct section_addr_info
*
203 alloc_section_addr_info (size_t num_sections
)
205 struct section_addr_info
*sap
;
208 size
= (sizeof (struct section_addr_info
)
209 + sizeof (struct other_sections
) * (num_sections
- 1));
210 sap
= (struct section_addr_info
*) xmalloc (size
);
211 memset (sap
, 0, size
);
212 sap
->num_sections
= num_sections
;
217 /* Build (allocate and populate) a section_addr_info struct from
218 an existing section table. */
220 extern struct section_addr_info
*
221 build_section_addr_info_from_section_table (const struct target_section
*start
,
222 const struct target_section
*end
)
224 struct section_addr_info
*sap
;
225 const struct target_section
*stp
;
228 sap
= alloc_section_addr_info (end
- start
);
230 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
232 if (bfd_get_section_flags (stp
->bfd
,
233 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
234 && oidx
< end
- start
)
236 sap
->other
[oidx
].addr
= stp
->addr
;
237 sap
->other
[oidx
].name
238 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
239 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
247 /* Create a section_addr_info from section offsets in ABFD. */
249 static struct section_addr_info
*
250 build_section_addr_info_from_bfd (bfd
*abfd
)
252 struct section_addr_info
*sap
;
254 struct bfd_section
*sec
;
256 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
257 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
258 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
260 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
261 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
262 sap
->other
[i
].sectindex
= sec
->index
;
268 /* Create a section_addr_info from section offsets in OBJFILE. */
270 struct section_addr_info
*
271 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
273 struct section_addr_info
*sap
;
276 /* Before reread_symbols gets rewritten it is not safe to call:
277 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
279 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
280 for (i
= 0; i
< sap
->num_sections
&& sap
->other
[i
].name
; i
++)
282 int sectindex
= sap
->other
[i
].sectindex
;
284 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
289 /* Free all memory allocated by build_section_addr_info_from_section_table. */
292 free_section_addr_info (struct section_addr_info
*sap
)
296 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
297 if (sap
->other
[idx
].name
)
298 xfree (sap
->other
[idx
].name
);
303 /* Initialize OBJFILE's sect_index_* members. */
305 init_objfile_sect_indices (struct objfile
*objfile
)
310 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
312 objfile
->sect_index_text
= sect
->index
;
314 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
316 objfile
->sect_index_data
= sect
->index
;
318 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
320 objfile
->sect_index_bss
= sect
->index
;
322 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
324 objfile
->sect_index_rodata
= sect
->index
;
326 /* This is where things get really weird... We MUST have valid
327 indices for the various sect_index_* members or gdb will abort.
328 So if for example, there is no ".text" section, we have to
329 accomodate that. First, check for a file with the standard
330 one or two segments. */
332 symfile_find_segment_sections (objfile
);
334 /* Except when explicitly adding symbol files at some address,
335 section_offsets contains nothing but zeros, so it doesn't matter
336 which slot in section_offsets the individual sect_index_* members
337 index into. So if they are all zero, it is safe to just point
338 all the currently uninitialized indices to the first slot. But
339 beware: if this is the main executable, it may be relocated
340 later, e.g. by the remote qOffsets packet, and then this will
341 be wrong! That's why we try segments first. */
343 for (i
= 0; i
< objfile
->num_sections
; i
++)
345 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
350 if (i
== objfile
->num_sections
)
352 if (objfile
->sect_index_text
== -1)
353 objfile
->sect_index_text
= 0;
354 if (objfile
->sect_index_data
== -1)
355 objfile
->sect_index_data
= 0;
356 if (objfile
->sect_index_bss
== -1)
357 objfile
->sect_index_bss
= 0;
358 if (objfile
->sect_index_rodata
== -1)
359 objfile
->sect_index_rodata
= 0;
363 /* The arguments to place_section. */
365 struct place_section_arg
367 struct section_offsets
*offsets
;
371 /* Find a unique offset to use for loadable section SECT if
372 the user did not provide an offset. */
375 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
377 struct place_section_arg
*arg
= obj
;
378 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
380 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
382 /* We are only interested in allocated sections. */
383 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
386 /* If the user specified an offset, honor it. */
387 if (offsets
[sect
->index
] != 0)
390 /* Otherwise, let's try to find a place for the section. */
391 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
398 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
400 int indx
= cur_sec
->index
;
402 /* We don't need to compare against ourself. */
406 /* We can only conflict with allocated sections. */
407 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
410 /* If the section offset is 0, either the section has not been placed
411 yet, or it was the lowest section placed (in which case LOWEST
412 will be past its end). */
413 if (offsets
[indx
] == 0)
416 /* If this section would overlap us, then we must move up. */
417 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
418 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
420 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
421 start_addr
= (start_addr
+ align
- 1) & -align
;
426 /* Otherwise, we appear to be OK. So far. */
431 offsets
[sect
->index
] = start_addr
;
432 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
435 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
436 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
440 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
442 struct section_addr_info
*addrs
)
446 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
448 /* Now calculate offsets for section that were specified by the caller. */
449 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
451 struct other_sections
*osp
;
453 osp
= &addrs
->other
[i
];
454 if (osp
->sectindex
== -1)
457 /* Record all sections in offsets. */
458 /* The section_offsets in the objfile are here filled in using
460 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
464 /* Transform section name S for a name comparison. prelink can split section
465 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
466 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
467 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
468 (`.sbss') section has invalid (increased) virtual address. */
471 addr_section_name (const char *s
)
473 if (strcmp (s
, ".dynbss") == 0)
475 if (strcmp (s
, ".sdynbss") == 0)
481 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
482 their (name, sectindex) pair. sectindex makes the sort by name stable. */
485 addrs_section_compar (const void *ap
, const void *bp
)
487 const struct other_sections
*a
= *((struct other_sections
**) ap
);
488 const struct other_sections
*b
= *((struct other_sections
**) bp
);
491 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
495 return a
->sectindex
- b
->sectindex
;
498 /* Provide sorted array of pointers to sections of ADDRS. The array is
499 terminated by NULL. Caller is responsible to call xfree for it. */
501 static struct other_sections
**
502 addrs_section_sort (struct section_addr_info
*addrs
)
504 struct other_sections
**array
;
507 /* `+ 1' for the NULL terminator. */
508 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
509 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
510 array
[i
] = &addrs
->other
[i
];
513 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
518 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
519 also SECTINDEXes specific to ABFD there. This function can be used to
520 rebase ADDRS to start referencing different BFD than before. */
523 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
525 asection
*lower_sect
;
526 CORE_ADDR lower_offset
;
528 struct cleanup
*my_cleanup
;
529 struct section_addr_info
*abfd_addrs
;
530 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
531 struct other_sections
**addrs_to_abfd_addrs
;
533 /* Find lowest loadable section to be used as starting point for
534 continguous sections. */
536 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
537 if (lower_sect
== NULL
)
539 warning (_("no loadable sections found in added symbol-file %s"),
540 bfd_get_filename (abfd
));
544 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
546 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
547 in ABFD. Section names are not unique - there can be multiple sections of
548 the same name. Also the sections of the same name do not have to be
549 adjacent to each other. Some sections may be present only in one of the
550 files. Even sections present in both files do not have to be in the same
553 Use stable sort by name for the sections in both files. Then linearly
554 scan both lists matching as most of the entries as possible. */
556 addrs_sorted
= addrs_section_sort (addrs
);
557 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
559 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
560 make_cleanup_free_section_addr_info (abfd_addrs
);
561 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
562 make_cleanup (xfree
, abfd_addrs_sorted
);
564 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
565 ABFD_ADDRS_SORTED. */
567 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
568 * addrs
->num_sections
);
569 make_cleanup (xfree
, addrs_to_abfd_addrs
);
571 while (*addrs_sorted
)
573 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
575 while (*abfd_addrs_sorted
576 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
580 if (*abfd_addrs_sorted
581 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
586 /* Make the found item directly addressable from ADDRS. */
587 index_in_addrs
= *addrs_sorted
- addrs
->other
;
588 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
589 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
591 /* Never use the same ABFD entry twice. */
598 /* Calculate offsets for the loadable sections.
599 FIXME! Sections must be in order of increasing loadable section
600 so that contiguous sections can use the lower-offset!!!
602 Adjust offsets if the segments are not contiguous.
603 If the section is contiguous, its offset should be set to
604 the offset of the highest loadable section lower than it
605 (the loadable section directly below it in memory).
606 this_offset = lower_offset = lower_addr - lower_orig_addr */
608 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
610 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
614 /* This is the index used by BFD. */
615 addrs
->other
[i
].sectindex
= sect
->sectindex
;
617 if (addrs
->other
[i
].addr
!= 0)
619 addrs
->other
[i
].addr
-= sect
->addr
;
620 lower_offset
= addrs
->other
[i
].addr
;
623 addrs
->other
[i
].addr
= lower_offset
;
627 /* addr_section_name transformation is not used for SECT_NAME. */
628 const char *sect_name
= addrs
->other
[i
].name
;
630 /* This section does not exist in ABFD, which is normally
631 unexpected and we want to issue a warning.
633 However, the ELF prelinker does create a few sections which are
634 marked in the main executable as loadable (they are loaded in
635 memory from the DYNAMIC segment) and yet are not present in
636 separate debug info files. This is fine, and should not cause
637 a warning. Shared libraries contain just the section
638 ".gnu.liblist" but it is not marked as loadable there. There is
639 no other way to identify them than by their name as the sections
640 created by prelink have no special flags.
642 For the sections `.bss' and `.sbss' see addr_section_name. */
644 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
645 || strcmp (sect_name
, ".gnu.conflict") == 0
646 || (strcmp (sect_name
, ".bss") == 0
648 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
649 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
650 || (strcmp (sect_name
, ".sbss") == 0
652 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
653 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
654 warning (_("section %s not found in %s"), sect_name
,
655 bfd_get_filename (abfd
));
657 addrs
->other
[i
].addr
= 0;
658 addrs
->other
[i
].sectindex
= -1;
662 do_cleanups (my_cleanup
);
665 /* Parse the user's idea of an offset for dynamic linking, into our idea
666 of how to represent it for fast symbol reading. This is the default
667 version of the sym_fns.sym_offsets function for symbol readers that
668 don't need to do anything special. It allocates a section_offsets table
669 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
672 default_symfile_offsets (struct objfile
*objfile
,
673 struct section_addr_info
*addrs
)
675 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
676 objfile
->section_offsets
= (struct section_offsets
*)
677 obstack_alloc (&objfile
->objfile_obstack
,
678 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
679 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
680 objfile
->num_sections
, addrs
);
682 /* For relocatable files, all loadable sections will start at zero.
683 The zero is meaningless, so try to pick arbitrary addresses such
684 that no loadable sections overlap. This algorithm is quadratic,
685 but the number of sections in a single object file is generally
687 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
689 struct place_section_arg arg
;
690 bfd
*abfd
= objfile
->obfd
;
693 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
694 /* We do not expect this to happen; just skip this step if the
695 relocatable file has a section with an assigned VMA. */
696 if (bfd_section_vma (abfd
, cur_sec
) != 0)
701 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
703 /* Pick non-overlapping offsets for sections the user did not
705 arg
.offsets
= objfile
->section_offsets
;
707 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
709 /* Correctly filling in the section offsets is not quite
710 enough. Relocatable files have two properties that
711 (most) shared objects do not:
713 - Their debug information will contain relocations. Some
714 shared libraries do also, but many do not, so this can not
717 - If there are multiple code sections they will be loaded
718 at different relative addresses in memory than they are
719 in the objfile, since all sections in the file will start
722 Because GDB has very limited ability to map from an
723 address in debug info to the correct code section,
724 it relies on adding SECT_OFF_TEXT to things which might be
725 code. If we clear all the section offsets, and set the
726 section VMAs instead, then symfile_relocate_debug_section
727 will return meaningful debug information pointing at the
730 GDB has too many different data structures for section
731 addresses - a bfd, objfile, and so_list all have section
732 tables, as does exec_ops. Some of these could probably
735 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
736 cur_sec
= cur_sec
->next
)
738 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
741 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
742 exec_set_section_address (bfd_get_filename (abfd
),
744 offsets
[cur_sec
->index
]);
745 offsets
[cur_sec
->index
] = 0;
750 /* Remember the bfd indexes for the .text, .data, .bss and
752 init_objfile_sect_indices (objfile
);
756 /* Divide the file into segments, which are individual relocatable units.
757 This is the default version of the sym_fns.sym_segments function for
758 symbol readers that do not have an explicit representation of segments.
759 It assumes that object files do not have segments, and fully linked
760 files have a single segment. */
762 struct symfile_segment_data
*
763 default_symfile_segments (bfd
*abfd
)
767 struct symfile_segment_data
*data
;
770 /* Relocatable files contain enough information to position each
771 loadable section independently; they should not be relocated
773 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
776 /* Make sure there is at least one loadable section in the file. */
777 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
779 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
787 low
= bfd_get_section_vma (abfd
, sect
);
788 high
= low
+ bfd_get_section_size (sect
);
790 data
= XZALLOC (struct symfile_segment_data
);
791 data
->num_segments
= 1;
792 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
793 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
795 num_sections
= bfd_count_sections (abfd
);
796 data
->segment_info
= XCALLOC (num_sections
, int);
798 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
802 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
805 vma
= bfd_get_section_vma (abfd
, sect
);
808 if (vma
+ bfd_get_section_size (sect
) > high
)
809 high
= vma
+ bfd_get_section_size (sect
);
811 data
->segment_info
[i
] = 1;
814 data
->segment_bases
[0] = low
;
815 data
->segment_sizes
[0] = high
- low
;
820 /* This is a convenience function to call sym_read for OBJFILE and
821 possibly force the partial symbols to be read. */
824 read_symbols (struct objfile
*objfile
, int add_flags
)
826 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
828 /* find_separate_debug_file_in_section should be called only if there is
829 single binary with no existing separate debug info file. */
830 if (!objfile_has_partial_symbols (objfile
)
831 && objfile
->separate_debug_objfile
== NULL
832 && objfile
->separate_debug_objfile_backlink
== NULL
)
834 bfd
*abfd
= find_separate_debug_file_in_section (objfile
);
835 struct cleanup
*cleanup
= make_cleanup_bfd_unref (abfd
);
838 symbol_file_add_separate (abfd
, add_flags
, objfile
);
840 do_cleanups (cleanup
);
842 if ((add_flags
& SYMFILE_NO_READ
) == 0)
843 require_partial_symbols (objfile
, 0);
846 /* Initialize entry point information for this objfile. */
849 init_entry_point_info (struct objfile
*objfile
)
851 /* Save startup file's range of PC addresses to help blockframe.c
852 decide where the bottom of the stack is. */
854 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
856 /* Executable file -- record its entry point so we'll recognize
857 the startup file because it contains the entry point. */
858 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
859 objfile
->ei
.entry_point_p
= 1;
861 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
862 && bfd_get_start_address (objfile
->obfd
) != 0)
864 /* Some shared libraries may have entry points set and be
865 runnable. There's no clear way to indicate this, so just check
866 for values other than zero. */
867 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
868 objfile
->ei
.entry_point_p
= 1;
872 /* Examination of non-executable.o files. Short-circuit this stuff. */
873 objfile
->ei
.entry_point_p
= 0;
876 if (objfile
->ei
.entry_point_p
)
878 CORE_ADDR entry_point
= objfile
->ei
.entry_point
;
880 /* Make certain that the address points at real code, and not a
881 function descriptor. */
883 = gdbarch_convert_from_func_ptr_addr (objfile
->gdbarch
,
887 /* Remove any ISA markers, so that this matches entries in the
889 objfile
->ei
.entry_point
890 = gdbarch_addr_bits_remove (objfile
->gdbarch
, entry_point
);
894 /* Process a symbol file, as either the main file or as a dynamically
897 This function does not set the OBJFILE's entry-point info.
899 OBJFILE is where the symbols are to be read from.
901 ADDRS is the list of section load addresses. If the user has given
902 an 'add-symbol-file' command, then this is the list of offsets and
903 addresses he or she provided as arguments to the command; or, if
904 we're handling a shared library, these are the actual addresses the
905 sections are loaded at, according to the inferior's dynamic linker
906 (as gleaned by GDB's shared library code). We convert each address
907 into an offset from the section VMA's as it appears in the object
908 file, and then call the file's sym_offsets function to convert this
909 into a format-specific offset table --- a `struct section_offsets'.
910 If ADDRS is non-zero, OFFSETS must be zero.
912 OFFSETS is a table of section offsets already in the right
913 format-specific representation. NUM_OFFSETS is the number of
914 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
915 assume this is the proper table the call to sym_offsets described
916 above would produce. Instead of calling sym_offsets, we just dump
917 it right into objfile->section_offsets. (When we're re-reading
918 symbols from an objfile, we don't have the original load address
919 list any more; all we have is the section offset table.) If
920 OFFSETS is non-zero, ADDRS must be zero.
922 ADD_FLAGS encodes verbosity level, whether this is main symbol or
923 an extra symbol file such as dynamically loaded code, and wether
924 breakpoint reset should be deferred. */
927 syms_from_objfile_1 (struct objfile
*objfile
,
928 struct section_addr_info
*addrs
,
929 struct section_offsets
*offsets
,
933 struct section_addr_info
*local_addr
= NULL
;
934 struct cleanup
*old_chain
;
935 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
937 gdb_assert (! (addrs
&& offsets
));
939 objfile
->sf
= find_sym_fns (objfile
->obfd
);
941 if (objfile
->sf
== NULL
)
943 /* No symbols to load, but we still need to make sure
944 that the section_offsets table is allocated. */
945 int num_sections
= bfd_count_sections (objfile
->obfd
);
946 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
948 objfile
->num_sections
= num_sections
;
949 objfile
->section_offsets
950 = obstack_alloc (&objfile
->objfile_obstack
, size
);
951 memset (objfile
->section_offsets
, 0, size
);
955 /* Make sure that partially constructed symbol tables will be cleaned up
956 if an error occurs during symbol reading. */
957 old_chain
= make_cleanup_free_objfile (objfile
);
959 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
960 list. We now establish the convention that an addr of zero means
961 no load address was specified. */
962 if (! addrs
&& ! offsets
)
965 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
966 make_cleanup (xfree
, local_addr
);
970 /* Now either addrs or offsets is non-zero. */
974 /* We will modify the main symbol table, make sure that all its users
975 will be cleaned up if an error occurs during symbol reading. */
976 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
978 /* Since no error yet, throw away the old symbol table. */
980 if (symfile_objfile
!= NULL
)
982 free_objfile (symfile_objfile
);
983 gdb_assert (symfile_objfile
== NULL
);
986 /* Currently we keep symbols from the add-symbol-file command.
987 If the user wants to get rid of them, they should do "symbol-file"
988 without arguments first. Not sure this is the best behavior
991 (*objfile
->sf
->sym_new_init
) (objfile
);
994 /* Convert addr into an offset rather than an absolute address.
995 We find the lowest address of a loaded segment in the objfile,
996 and assume that <addr> is where that got loaded.
998 We no longer warn if the lowest section is not a text segment (as
999 happens for the PA64 port. */
1000 if (addrs
&& addrs
->other
[0].name
)
1001 addr_info_make_relative (addrs
, objfile
->obfd
);
1003 /* Initialize symbol reading routines for this objfile, allow complaints to
1004 appear for this new file, and record how verbose to be, then do the
1005 initial symbol reading for this file. */
1007 (*objfile
->sf
->sym_init
) (objfile
);
1008 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1011 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1014 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
1016 /* Just copy in the offset table directly as given to us. */
1017 objfile
->num_sections
= num_offsets
;
1018 objfile
->section_offsets
1019 = ((struct section_offsets
*)
1020 obstack_alloc (&objfile
->objfile_obstack
, size
));
1021 memcpy (objfile
->section_offsets
, offsets
, size
);
1023 init_objfile_sect_indices (objfile
);
1026 read_symbols (objfile
, add_flags
);
1028 /* Discard cleanups as symbol reading was successful. */
1030 discard_cleanups (old_chain
);
1034 /* Same as syms_from_objfile_1, but also initializes the objfile
1035 entry-point info. */
1038 syms_from_objfile (struct objfile
*objfile
,
1039 struct section_addr_info
*addrs
,
1040 struct section_offsets
*offsets
,
1044 syms_from_objfile_1 (objfile
, addrs
, offsets
, num_offsets
, add_flags
);
1045 init_entry_point_info (objfile
);
1048 /* Perform required actions after either reading in the initial
1049 symbols for a new objfile, or mapping in the symbols from a reusable
1050 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1053 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1055 /* If this is the main symbol file we have to clean up all users of the
1056 old main symbol file. Otherwise it is sufficient to fixup all the
1057 breakpoints that may have been redefined by this symbol file. */
1058 if (add_flags
& SYMFILE_MAINLINE
)
1060 /* OK, make it the "real" symbol file. */
1061 symfile_objfile
= objfile
;
1063 clear_symtab_users (add_flags
);
1065 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1067 breakpoint_re_set ();
1070 /* We're done reading the symbol file; finish off complaints. */
1071 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1074 /* Process a symbol file, as either the main file or as a dynamically
1077 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1078 A new reference is acquired by this function.
1080 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1081 extra, such as dynamically loaded code, and what to do with breakpoins.
1083 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1084 syms_from_objfile, above.
1085 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1087 PARENT is the original objfile if ABFD is a separate debug info file.
1088 Otherwise PARENT is NULL.
1090 Upon success, returns a pointer to the objfile that was added.
1091 Upon failure, jumps back to command level (never returns). */
1093 static struct objfile
*
1094 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1096 struct section_addr_info
*addrs
,
1097 struct section_offsets
*offsets
,
1099 int flags
, struct objfile
*parent
)
1101 struct objfile
*objfile
;
1102 const char *name
= bfd_get_filename (abfd
);
1103 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1104 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1105 const int should_print
= ((from_tty
|| info_verbose
)
1106 && (readnow_symbol_files
1107 || (add_flags
& SYMFILE_NO_READ
) == 0));
1109 if (readnow_symbol_files
)
1111 flags
|= OBJF_READNOW
;
1112 add_flags
&= ~SYMFILE_NO_READ
;
1115 /* Give user a chance to burp if we'd be
1116 interactively wiping out any existing symbols. */
1118 if ((have_full_symbols () || have_partial_symbols ())
1121 && !query (_("Load new symbol table from \"%s\"? "), name
))
1122 error (_("Not confirmed."));
1124 objfile
= allocate_objfile (abfd
, flags
| (mainline
? OBJF_MAINLINE
: 0));
1127 add_separate_debug_objfile (objfile
, parent
);
1129 /* We either created a new mapped symbol table, mapped an existing
1130 symbol table file which has not had initial symbol reading
1131 performed, or need to read an unmapped symbol table. */
1134 if (deprecated_pre_add_symbol_hook
)
1135 deprecated_pre_add_symbol_hook (name
);
1138 printf_unfiltered (_("Reading symbols from %s..."), name
);
1140 gdb_flush (gdb_stdout
);
1143 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1146 /* We now have at least a partial symbol table. Check to see if the
1147 user requested that all symbols be read on initial access via either
1148 the gdb startup command line or on a per symbol file basis. Expand
1149 all partial symbol tables for this objfile if so. */
1151 if ((flags
& OBJF_READNOW
))
1155 printf_unfiltered (_("expanding to full symbols..."));
1157 gdb_flush (gdb_stdout
);
1161 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1164 if (should_print
&& !objfile_has_symbols (objfile
))
1167 printf_unfiltered (_("(no debugging symbols found)..."));
1173 if (deprecated_post_add_symbol_hook
)
1174 deprecated_post_add_symbol_hook ();
1176 printf_unfiltered (_("done.\n"));
1179 /* We print some messages regardless of whether 'from_tty ||
1180 info_verbose' is true, so make sure they go out at the right
1182 gdb_flush (gdb_stdout
);
1184 if (objfile
->sf
== NULL
)
1186 observer_notify_new_objfile (objfile
);
1187 return objfile
; /* No symbols. */
1190 new_symfile_objfile (objfile
, add_flags
);
1192 observer_notify_new_objfile (objfile
);
1194 bfd_cache_close_all ();
1198 /* Add BFD as a separate debug file for OBJFILE. */
1201 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1203 struct objfile
*new_objfile
;
1204 struct section_addr_info
*sap
;
1205 struct cleanup
*my_cleanup
;
1207 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1208 because sections of BFD may not match sections of OBJFILE and because
1209 vma may have been modified by tools such as prelink. */
1210 sap
= build_section_addr_info_from_objfile (objfile
);
1211 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1213 new_objfile
= symbol_file_add_with_addrs_or_offsets
1214 (bfd
, symfile_flags
,
1216 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1220 do_cleanups (my_cleanup
);
1223 /* Process the symbol file ABFD, as either the main file or as a
1224 dynamically loaded file.
1226 See symbol_file_add_with_addrs_or_offsets's comments for
1229 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1230 struct section_addr_info
*addrs
,
1231 int flags
, struct objfile
*parent
)
1233 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1238 /* Process a symbol file, as either the main file or as a dynamically
1239 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1242 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1245 bfd
*bfd
= symfile_bfd_open (name
);
1246 struct cleanup
*cleanup
= make_cleanup_bfd_unref (bfd
);
1247 struct objfile
*objf
;
1249 objf
= symbol_file_add_from_bfd (bfd
, add_flags
, addrs
, flags
, NULL
);
1250 do_cleanups (cleanup
);
1255 /* Call symbol_file_add() with default values and update whatever is
1256 affected by the loading of a new main().
1257 Used when the file is supplied in the gdb command line
1258 and by some targets with special loading requirements.
1259 The auxiliary function, symbol_file_add_main_1(), has the flags
1260 argument for the switches that can only be specified in the symbol_file
1264 symbol_file_add_main (char *args
, int from_tty
)
1266 symbol_file_add_main_1 (args
, from_tty
, 0);
1270 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1272 const int add_flags
= (current_inferior ()->symfile_flags
1273 | SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0));
1275 symbol_file_add (args
, add_flags
, NULL
, flags
);
1277 /* Getting new symbols may change our opinion about
1278 what is frameless. */
1279 reinit_frame_cache ();
1281 if ((flags
& SYMFILE_NO_READ
) == 0)
1282 set_initial_language ();
1286 symbol_file_clear (int from_tty
)
1288 if ((have_full_symbols () || have_partial_symbols ())
1291 ? !query (_("Discard symbol table from `%s'? "),
1292 symfile_objfile
->name
)
1293 : !query (_("Discard symbol table? "))))
1294 error (_("Not confirmed."));
1296 /* solib descriptors may have handles to objfiles. Wipe them before their
1297 objfiles get stale by free_all_objfiles. */
1298 no_shared_libraries (NULL
, from_tty
);
1300 free_all_objfiles ();
1302 gdb_assert (symfile_objfile
== NULL
);
1304 printf_unfiltered (_("No symbol file now.\n"));
1308 separate_debug_file_exists (const char *name
, unsigned long crc
,
1309 struct objfile
*parent_objfile
)
1311 unsigned long file_crc
;
1314 struct stat parent_stat
, abfd_stat
;
1315 int verified_as_different
;
1317 /* Find a separate debug info file as if symbols would be present in
1318 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1319 section can contain just the basename of PARENT_OBJFILE without any
1320 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1321 the separate debug infos with the same basename can exist. */
1323 if (filename_cmp (name
, parent_objfile
->name
) == 0)
1326 abfd
= gdb_bfd_open_maybe_remote (name
);
1331 /* Verify symlinks were not the cause of filename_cmp name difference above.
1333 Some operating systems, e.g. Windows, do not provide a meaningful
1334 st_ino; they always set it to zero. (Windows does provide a
1335 meaningful st_dev.) Do not indicate a duplicate library in that
1336 case. While there is no guarantee that a system that provides
1337 meaningful inode numbers will never set st_ino to zero, this is
1338 merely an optimization, so we do not need to worry about false
1341 if (bfd_stat (abfd
, &abfd_stat
) == 0
1342 && abfd_stat
.st_ino
!= 0
1343 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1345 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1346 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1348 gdb_bfd_unref (abfd
);
1351 verified_as_different
= 1;
1354 verified_as_different
= 0;
1356 file_crc_p
= gdb_bfd_crc (abfd
, &file_crc
);
1358 gdb_bfd_unref (abfd
);
1363 if (crc
!= file_crc
)
1365 unsigned long parent_crc
;
1367 /* If one (or both) the files are accessed for example the via "remote:"
1368 gdbserver way it does not support the bfd_stat operation. Verify
1369 whether those two files are not the same manually. */
1371 if (!verified_as_different
)
1373 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1377 if (verified_as_different
|| parent_crc
!= file_crc
)
1378 warning (_("the debug information found in \"%s\""
1379 " does not match \"%s\" (CRC mismatch).\n"),
1380 name
, parent_objfile
->name
);
1388 char *debug_file_directory
= NULL
;
1390 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1391 struct cmd_list_element
*c
, const char *value
)
1393 fprintf_filtered (file
,
1394 _("The directory where separate debug "
1395 "symbols are searched for is \"%s\".\n"),
1399 #if ! defined (DEBUG_SUBDIRECTORY)
1400 #define DEBUG_SUBDIRECTORY ".debug"
1403 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1404 where the original file resides (may not be the same as
1405 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1406 looking for. Returns the name of the debuginfo, of NULL. */
1409 find_separate_debug_file (const char *dir
,
1410 const char *canon_dir
,
1411 const char *debuglink
,
1412 unsigned long crc32
, struct objfile
*objfile
)
1417 VEC (char_ptr
) *debugdir_vec
;
1418 struct cleanup
*back_to
;
1421 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1423 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1424 i
= strlen (canon_dir
);
1426 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1428 + strlen (DEBUG_SUBDIRECTORY
)
1430 + strlen (debuglink
)
1433 /* First try in the same directory as the original file. */
1434 strcpy (debugfile
, dir
);
1435 strcat (debugfile
, debuglink
);
1437 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1440 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1441 strcpy (debugfile
, dir
);
1442 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1443 strcat (debugfile
, "/");
1444 strcat (debugfile
, debuglink
);
1446 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1449 /* Then try in the global debugfile directories.
1451 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1452 cause "/..." lookups. */
1454 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1455 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1457 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1459 strcpy (debugfile
, debugdir
);
1460 strcat (debugfile
, "/");
1461 strcat (debugfile
, dir
);
1462 strcat (debugfile
, debuglink
);
1464 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1467 /* If the file is in the sysroot, try using its base path in the
1468 global debugfile directory. */
1469 if (canon_dir
!= NULL
1470 && filename_ncmp (canon_dir
, gdb_sysroot
,
1471 strlen (gdb_sysroot
)) == 0
1472 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1474 strcpy (debugfile
, debugdir
);
1475 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1476 strcat (debugfile
, "/");
1477 strcat (debugfile
, debuglink
);
1479 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1484 do_cleanups (back_to
);
1489 /* Modify PATH to contain only "directory/" part of PATH.
1490 If there were no directory separators in PATH, PATH will be empty
1491 string on return. */
1494 terminate_after_last_dir_separator (char *path
)
1498 /* Strip off the final filename part, leaving the directory name,
1499 followed by a slash. The directory can be relative or absolute. */
1500 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1501 if (IS_DIR_SEPARATOR (path
[i
]))
1504 /* If I is -1 then no directory is present there and DIR will be "". */
1508 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1509 Returns pathname, or NULL. */
1512 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1515 char *dir
, *canon_dir
;
1517 unsigned long crc32
;
1518 struct cleanup
*cleanups
;
1520 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1522 if (debuglink
== NULL
)
1524 /* There's no separate debug info, hence there's no way we could
1525 load it => no warning. */
1529 cleanups
= make_cleanup (xfree
, debuglink
);
1530 dir
= xstrdup (objfile
->name
);
1531 make_cleanup (xfree
, dir
);
1532 terminate_after_last_dir_separator (dir
);
1533 canon_dir
= lrealpath (dir
);
1535 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1539 if (debugfile
== NULL
)
1542 /* For PR gdb/9538, try again with realpath (if different from the
1547 if (lstat (objfile
->name
, &st_buf
) == 0 && S_ISLNK(st_buf
.st_mode
))
1551 symlink_dir
= lrealpath (objfile
->name
);
1552 if (symlink_dir
!= NULL
)
1554 make_cleanup (xfree
, symlink_dir
);
1555 terminate_after_last_dir_separator (symlink_dir
);
1556 if (strcmp (dir
, symlink_dir
) != 0)
1558 /* Different directory, so try using it. */
1559 debugfile
= find_separate_debug_file (symlink_dir
,
1567 #endif /* HAVE_LSTAT */
1570 do_cleanups (cleanups
);
1575 /* This is the symbol-file command. Read the file, analyze its
1576 symbols, and add a struct symtab to a symtab list. The syntax of
1577 the command is rather bizarre:
1579 1. The function buildargv implements various quoting conventions
1580 which are undocumented and have little or nothing in common with
1581 the way things are quoted (or not quoted) elsewhere in GDB.
1583 2. Options are used, which are not generally used in GDB (perhaps
1584 "set mapped on", "set readnow on" would be better)
1586 3. The order of options matters, which is contrary to GNU
1587 conventions (because it is confusing and inconvenient). */
1590 symbol_file_command (char *args
, int from_tty
)
1596 symbol_file_clear (from_tty
);
1600 char **argv
= gdb_buildargv (args
);
1601 int flags
= OBJF_USERLOADED
;
1602 struct cleanup
*cleanups
;
1605 cleanups
= make_cleanup_freeargv (argv
);
1606 while (*argv
!= NULL
)
1608 if (strcmp (*argv
, "-readnow") == 0)
1609 flags
|= OBJF_READNOW
;
1610 else if (**argv
== '-')
1611 error (_("unknown option `%s'"), *argv
);
1614 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1622 error (_("no symbol file name was specified"));
1624 do_cleanups (cleanups
);
1628 /* Set the initial language.
1630 FIXME: A better solution would be to record the language in the
1631 psymtab when reading partial symbols, and then use it (if known) to
1632 set the language. This would be a win for formats that encode the
1633 language in an easily discoverable place, such as DWARF. For
1634 stabs, we can jump through hoops looking for specially named
1635 symbols or try to intuit the language from the specific type of
1636 stabs we find, but we can't do that until later when we read in
1640 set_initial_language (void)
1642 enum language lang
= language_unknown
;
1644 if (language_of_main
!= language_unknown
)
1645 lang
= language_of_main
;
1648 const char *filename
;
1650 filename
= find_main_filename ();
1651 if (filename
!= NULL
)
1652 lang
= deduce_language_from_filename (filename
);
1655 if (lang
== language_unknown
)
1657 /* Make C the default language */
1661 set_language (lang
);
1662 expected_language
= current_language
; /* Don't warn the user. */
1665 /* If NAME is a remote name open the file using remote protocol, otherwise
1666 open it normally. Returns a new reference to the BFD. On error,
1667 returns NULL with the BFD error set. */
1670 gdb_bfd_open_maybe_remote (const char *name
)
1674 if (remote_filename_p (name
))
1675 result
= remote_bfd_open (name
, gnutarget
);
1677 result
= gdb_bfd_open (name
, gnutarget
, -1);
1683 /* Open the file specified by NAME and hand it off to BFD for
1684 preliminary analysis. Return a newly initialized bfd *, which
1685 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1686 absolute). In case of trouble, error() is called. */
1689 symfile_bfd_open (char *name
)
1693 char *absolute_name
;
1695 if (remote_filename_p (name
))
1697 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1699 error (_("`%s': can't open to read symbols: %s."), name
,
1700 bfd_errmsg (bfd_get_error ()));
1702 if (!bfd_check_format (sym_bfd
, bfd_object
))
1704 make_cleanup_bfd_unref (sym_bfd
);
1705 error (_("`%s': can't read symbols: %s."), name
,
1706 bfd_errmsg (bfd_get_error ()));
1712 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1714 /* Look down path for it, allocate 2nd new malloc'd copy. */
1715 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1716 O_RDONLY
| O_BINARY
, &absolute_name
);
1717 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1720 char *exename
= alloca (strlen (name
) + 5);
1722 strcat (strcpy (exename
, name
), ".exe");
1723 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1724 O_RDONLY
| O_BINARY
, &absolute_name
);
1729 make_cleanup (xfree
, name
);
1730 perror_with_name (name
);
1734 name
= absolute_name
;
1735 make_cleanup (xfree
, name
);
1737 sym_bfd
= gdb_bfd_open (name
, gnutarget
, desc
);
1740 make_cleanup (xfree
, name
);
1741 error (_("`%s': can't open to read symbols: %s."), name
,
1742 bfd_errmsg (bfd_get_error ()));
1744 bfd_set_cacheable (sym_bfd
, 1);
1746 if (!bfd_check_format (sym_bfd
, bfd_object
))
1748 make_cleanup_bfd_unref (sym_bfd
);
1749 error (_("`%s': can't read symbols: %s."), name
,
1750 bfd_errmsg (bfd_get_error ()));
1756 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1757 the section was not found. */
1760 get_section_index (struct objfile
*objfile
, char *section_name
)
1762 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1770 /* Link SF into the global symtab_fns list. Called on startup by the
1771 _initialize routine in each object file format reader, to register
1772 information about each format the reader is prepared to handle. */
1775 add_symtab_fns (const struct sym_fns
*sf
)
1777 VEC_safe_push (sym_fns_ptr
, symtab_fns
, sf
);
1780 /* Initialize OBJFILE to read symbols from its associated BFD. It
1781 either returns or calls error(). The result is an initialized
1782 struct sym_fns in the objfile structure, that contains cached
1783 information about the symbol file. */
1785 static const struct sym_fns
*
1786 find_sym_fns (bfd
*abfd
)
1788 const struct sym_fns
*sf
;
1789 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1792 if (our_flavour
== bfd_target_srec_flavour
1793 || our_flavour
== bfd_target_ihex_flavour
1794 || our_flavour
== bfd_target_tekhex_flavour
)
1795 return NULL
; /* No symbols. */
1797 for (i
= 0; VEC_iterate (sym_fns_ptr
, symtab_fns
, i
, sf
); ++i
)
1798 if (our_flavour
== sf
->sym_flavour
)
1801 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1802 bfd_get_target (abfd
));
1806 /* This function runs the load command of our current target. */
1809 load_command (char *arg
, int from_tty
)
1813 /* The user might be reloading because the binary has changed. Take
1814 this opportunity to check. */
1815 reopen_exec_file ();
1823 parg
= arg
= get_exec_file (1);
1825 /* Count how many \ " ' tab space there are in the name. */
1826 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1834 /* We need to quote this string so buildargv can pull it apart. */
1835 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1839 make_cleanup (xfree
, temp
);
1842 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1844 strncpy (ptemp
, prev
, parg
- prev
);
1845 ptemp
+= parg
- prev
;
1849 strcpy (ptemp
, prev
);
1855 target_load (arg
, from_tty
);
1857 /* After re-loading the executable, we don't really know which
1858 overlays are mapped any more. */
1859 overlay_cache_invalid
= 1;
1862 /* This version of "load" should be usable for any target. Currently
1863 it is just used for remote targets, not inftarg.c or core files,
1864 on the theory that only in that case is it useful.
1866 Avoiding xmodem and the like seems like a win (a) because we don't have
1867 to worry about finding it, and (b) On VMS, fork() is very slow and so
1868 we don't want to run a subprocess. On the other hand, I'm not sure how
1869 performance compares. */
1871 static int validate_download
= 0;
1873 /* Callback service function for generic_load (bfd_map_over_sections). */
1876 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1878 bfd_size_type
*sum
= data
;
1880 *sum
+= bfd_get_section_size (asec
);
1883 /* Opaque data for load_section_callback. */
1884 struct load_section_data
{
1885 CORE_ADDR load_offset
;
1886 struct load_progress_data
*progress_data
;
1887 VEC(memory_write_request_s
) *requests
;
1890 /* Opaque data for load_progress. */
1891 struct load_progress_data
{
1892 /* Cumulative data. */
1893 unsigned long write_count
;
1894 unsigned long data_count
;
1895 bfd_size_type total_size
;
1898 /* Opaque data for load_progress for a single section. */
1899 struct load_progress_section_data
{
1900 struct load_progress_data
*cumulative
;
1902 /* Per-section data. */
1903 const char *section_name
;
1904 ULONGEST section_sent
;
1905 ULONGEST section_size
;
1910 /* Target write callback routine for progress reporting. */
1913 load_progress (ULONGEST bytes
, void *untyped_arg
)
1915 struct load_progress_section_data
*args
= untyped_arg
;
1916 struct load_progress_data
*totals
;
1919 /* Writing padding data. No easy way to get at the cumulative
1920 stats, so just ignore this. */
1923 totals
= args
->cumulative
;
1925 if (bytes
== 0 && args
->section_sent
== 0)
1927 /* The write is just starting. Let the user know we've started
1929 ui_out_message (current_uiout
, 0, "Loading section %s, size %s lma %s\n",
1930 args
->section_name
, hex_string (args
->section_size
),
1931 paddress (target_gdbarch (), args
->lma
));
1935 if (validate_download
)
1937 /* Broken memories and broken monitors manifest themselves here
1938 when bring new computers to life. This doubles already slow
1940 /* NOTE: cagney/1999-10-18: A more efficient implementation
1941 might add a verify_memory() method to the target vector and
1942 then use that. remote.c could implement that method using
1943 the ``qCRC'' packet. */
1944 gdb_byte
*check
= xmalloc (bytes
);
1945 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1947 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1948 error (_("Download verify read failed at %s"),
1949 paddress (target_gdbarch (), args
->lma
));
1950 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1951 error (_("Download verify compare failed at %s"),
1952 paddress (target_gdbarch (), args
->lma
));
1953 do_cleanups (verify_cleanups
);
1955 totals
->data_count
+= bytes
;
1957 args
->buffer
+= bytes
;
1958 totals
->write_count
+= 1;
1959 args
->section_sent
+= bytes
;
1960 if (check_quit_flag ()
1961 || (deprecated_ui_load_progress_hook
!= NULL
1962 && deprecated_ui_load_progress_hook (args
->section_name
,
1963 args
->section_sent
)))
1964 error (_("Canceled the download"));
1966 if (deprecated_show_load_progress
!= NULL
)
1967 deprecated_show_load_progress (args
->section_name
,
1971 totals
->total_size
);
1974 /* Callback service function for generic_load (bfd_map_over_sections). */
1977 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1979 struct memory_write_request
*new_request
;
1980 struct load_section_data
*args
= data
;
1981 struct load_progress_section_data
*section_data
;
1982 bfd_size_type size
= bfd_get_section_size (asec
);
1984 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1986 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1992 new_request
= VEC_safe_push (memory_write_request_s
,
1993 args
->requests
, NULL
);
1994 memset (new_request
, 0, sizeof (struct memory_write_request
));
1995 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1996 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1997 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
1999 new_request
->data
= xmalloc (size
);
2000 new_request
->baton
= section_data
;
2002 buffer
= new_request
->data
;
2004 section_data
->cumulative
= args
->progress_data
;
2005 section_data
->section_name
= sect_name
;
2006 section_data
->section_size
= size
;
2007 section_data
->lma
= new_request
->begin
;
2008 section_data
->buffer
= buffer
;
2010 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2013 /* Clean up an entire memory request vector, including load
2014 data and progress records. */
2017 clear_memory_write_data (void *arg
)
2019 VEC(memory_write_request_s
) **vec_p
= arg
;
2020 VEC(memory_write_request_s
) *vec
= *vec_p
;
2022 struct memory_write_request
*mr
;
2024 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2029 VEC_free (memory_write_request_s
, vec
);
2033 generic_load (char *args
, int from_tty
)
2036 struct timeval start_time
, end_time
;
2038 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2039 struct load_section_data cbdata
;
2040 struct load_progress_data total_progress
;
2041 struct ui_out
*uiout
= current_uiout
;
2046 memset (&cbdata
, 0, sizeof (cbdata
));
2047 memset (&total_progress
, 0, sizeof (total_progress
));
2048 cbdata
.progress_data
= &total_progress
;
2050 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2053 error_no_arg (_("file to load"));
2055 argv
= gdb_buildargv (args
);
2056 make_cleanup_freeargv (argv
);
2058 filename
= tilde_expand (argv
[0]);
2059 make_cleanup (xfree
, filename
);
2061 if (argv
[1] != NULL
)
2065 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2067 /* If the last word was not a valid number then
2068 treat it as a file name with spaces in. */
2069 if (argv
[1] == endptr
)
2070 error (_("Invalid download offset:%s."), argv
[1]);
2072 if (argv
[2] != NULL
)
2073 error (_("Too many parameters."));
2076 /* Open the file for loading. */
2077 loadfile_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2078 if (loadfile_bfd
== NULL
)
2080 perror_with_name (filename
);
2084 make_cleanup_bfd_unref (loadfile_bfd
);
2086 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2088 error (_("\"%s\" is not an object file: %s"), filename
,
2089 bfd_errmsg (bfd_get_error ()));
2092 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2093 (void *) &total_progress
.total_size
);
2095 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2097 gettimeofday (&start_time
, NULL
);
2099 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2100 load_progress
) != 0)
2101 error (_("Load failed"));
2103 gettimeofday (&end_time
, NULL
);
2105 entry
= bfd_get_start_address (loadfile_bfd
);
2106 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2107 ui_out_text (uiout
, "Start address ");
2108 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch (), entry
));
2109 ui_out_text (uiout
, ", load size ");
2110 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2111 ui_out_text (uiout
, "\n");
2112 /* We were doing this in remote-mips.c, I suspect it is right
2113 for other targets too. */
2114 regcache_write_pc (get_current_regcache (), entry
);
2116 /* Reset breakpoints, now that we have changed the load image. For
2117 instance, breakpoints may have been set (or reset, by
2118 post_create_inferior) while connected to the target but before we
2119 loaded the program. In that case, the prologue analyzer could
2120 have read instructions from the target to find the right
2121 breakpoint locations. Loading has changed the contents of that
2124 breakpoint_re_set ();
2126 /* FIXME: are we supposed to call symbol_file_add or not? According
2127 to a comment from remote-mips.c (where a call to symbol_file_add
2128 was commented out), making the call confuses GDB if more than one
2129 file is loaded in. Some targets do (e.g., remote-vx.c) but
2130 others don't (or didn't - perhaps they have all been deleted). */
2132 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2133 total_progress
.write_count
,
2134 &start_time
, &end_time
);
2136 do_cleanups (old_cleanups
);
2139 /* Report how fast the transfer went. */
2142 print_transfer_performance (struct ui_file
*stream
,
2143 unsigned long data_count
,
2144 unsigned long write_count
,
2145 const struct timeval
*start_time
,
2146 const struct timeval
*end_time
)
2148 ULONGEST time_count
;
2149 struct ui_out
*uiout
= current_uiout
;
2151 /* Compute the elapsed time in milliseconds, as a tradeoff between
2152 accuracy and overflow. */
2153 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2154 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2156 ui_out_text (uiout
, "Transfer rate: ");
2159 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2161 if (ui_out_is_mi_like_p (uiout
))
2163 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2164 ui_out_text (uiout
, " bits/sec");
2166 else if (rate
< 1024)
2168 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2169 ui_out_text (uiout
, " bytes/sec");
2173 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2174 ui_out_text (uiout
, " KB/sec");
2179 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2180 ui_out_text (uiout
, " bits in <1 sec");
2182 if (write_count
> 0)
2184 ui_out_text (uiout
, ", ");
2185 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2186 ui_out_text (uiout
, " bytes/write");
2188 ui_out_text (uiout
, ".\n");
2191 /* This function allows the addition of incrementally linked object files.
2192 It does not modify any state in the target, only in the debugger. */
2193 /* Note: ezannoni 2000-04-13 This function/command used to have a
2194 special case syntax for the rombug target (Rombug is the boot
2195 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2196 rombug case, the user doesn't need to supply a text address,
2197 instead a call to target_link() (in target.c) would supply the
2198 value to use. We are now discontinuing this type of ad hoc syntax. */
2201 add_symbol_file_command (char *args
, int from_tty
)
2203 struct gdbarch
*gdbarch
= get_current_arch ();
2204 char *filename
= NULL
;
2205 int flags
= OBJF_USERLOADED
;
2207 int section_index
= 0;
2211 int expecting_sec_name
= 0;
2212 int expecting_sec_addr
= 0;
2221 struct section_addr_info
*section_addrs
;
2222 struct sect_opt
*sect_opts
= NULL
;
2223 size_t num_sect_opts
= 0;
2224 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2227 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2228 * sizeof (struct sect_opt
));
2233 error (_("add-symbol-file takes a file name and an address"));
2235 argv
= gdb_buildargv (args
);
2236 make_cleanup_freeargv (argv
);
2238 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2240 /* Process the argument. */
2243 /* The first argument is the file name. */
2244 filename
= tilde_expand (arg
);
2245 make_cleanup (xfree
, filename
);
2250 /* The second argument is always the text address at which
2251 to load the program. */
2252 sect_opts
[section_index
].name
= ".text";
2253 sect_opts
[section_index
].value
= arg
;
2254 if (++section_index
>= num_sect_opts
)
2257 sect_opts
= ((struct sect_opt
*)
2258 xrealloc (sect_opts
,
2260 * sizeof (struct sect_opt
)));
2265 /* It's an option (starting with '-') or it's an argument
2270 if (strcmp (arg
, "-readnow") == 0)
2271 flags
|= OBJF_READNOW
;
2272 else if (strcmp (arg
, "-s") == 0)
2274 expecting_sec_name
= 1;
2275 expecting_sec_addr
= 1;
2280 if (expecting_sec_name
)
2282 sect_opts
[section_index
].name
= arg
;
2283 expecting_sec_name
= 0;
2286 if (expecting_sec_addr
)
2288 sect_opts
[section_index
].value
= arg
;
2289 expecting_sec_addr
= 0;
2290 if (++section_index
>= num_sect_opts
)
2293 sect_opts
= ((struct sect_opt
*)
2294 xrealloc (sect_opts
,
2296 * sizeof (struct sect_opt
)));
2300 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2301 " [-readnow] [-s <secname> <addr>]*"));
2306 /* This command takes at least two arguments. The first one is a
2307 filename, and the second is the address where this file has been
2308 loaded. Abort now if this address hasn't been provided by the
2310 if (section_index
< 1)
2311 error (_("The address where %s has been loaded is missing"), filename
);
2313 /* Print the prompt for the query below. And save the arguments into
2314 a sect_addr_info structure to be passed around to other
2315 functions. We have to split this up into separate print
2316 statements because hex_string returns a local static
2319 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2320 section_addrs
= alloc_section_addr_info (section_index
);
2321 make_cleanup (xfree
, section_addrs
);
2322 for (i
= 0; i
< section_index
; i
++)
2325 char *val
= sect_opts
[i
].value
;
2326 char *sec
= sect_opts
[i
].name
;
2328 addr
= parse_and_eval_address (val
);
2330 /* Here we store the section offsets in the order they were
2331 entered on the command line. */
2332 section_addrs
->other
[sec_num
].name
= sec
;
2333 section_addrs
->other
[sec_num
].addr
= addr
;
2334 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2335 paddress (gdbarch
, addr
));
2338 /* The object's sections are initialized when a
2339 call is made to build_objfile_section_table (objfile).
2340 This happens in reread_symbols.
2341 At this point, we don't know what file type this is,
2342 so we can't determine what section names are valid. */
2345 if (from_tty
&& (!query ("%s", "")))
2346 error (_("Not confirmed."));
2348 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2349 section_addrs
, flags
);
2351 /* Getting new symbols may change our opinion about what is
2353 reinit_frame_cache ();
2354 do_cleanups (my_cleanups
);
2358 typedef struct objfile
*objfilep
;
2360 DEF_VEC_P (objfilep
);
2362 /* Re-read symbols if a symbol-file has changed. */
2364 reread_symbols (void)
2366 struct objfile
*objfile
;
2368 struct stat new_statbuf
;
2370 VEC (objfilep
) *new_objfiles
= NULL
;
2371 struct cleanup
*all_cleanups
;
2373 all_cleanups
= make_cleanup (VEC_cleanup (objfilep
), &new_objfiles
);
2375 /* With the addition of shared libraries, this should be modified,
2376 the load time should be saved in the partial symbol tables, since
2377 different tables may come from different source files. FIXME.
2378 This routine should then walk down each partial symbol table
2379 and see if the symbol table that it originates from has been changed. */
2381 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2383 /* solib-sunos.c creates one objfile with obfd. */
2384 if (objfile
->obfd
== NULL
)
2387 /* Separate debug objfiles are handled in the main objfile. */
2388 if (objfile
->separate_debug_objfile_backlink
)
2391 /* If this object is from an archive (what you usually create with
2392 `ar', often called a `static library' on most systems, though
2393 a `shared library' on AIX is also an archive), then you should
2394 stat on the archive name, not member name. */
2395 if (objfile
->obfd
->my_archive
)
2396 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2398 res
= stat (objfile
->name
, &new_statbuf
);
2401 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2402 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2406 new_modtime
= new_statbuf
.st_mtime
;
2407 if (new_modtime
!= objfile
->mtime
)
2409 struct cleanup
*old_cleanups
;
2410 struct section_offsets
*offsets
;
2412 char *obfd_filename
;
2414 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2417 /* There are various functions like symbol_file_add,
2418 symfile_bfd_open, syms_from_objfile, etc., which might
2419 appear to do what we want. But they have various other
2420 effects which we *don't* want. So we just do stuff
2421 ourselves. We don't worry about mapped files (for one thing,
2422 any mapped file will be out of date). */
2424 /* If we get an error, blow away this objfile (not sure if
2425 that is the correct response for things like shared
2427 old_cleanups
= make_cleanup_free_objfile (objfile
);
2428 /* We need to do this whenever any symbols go away. */
2429 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2431 if (exec_bfd
!= NULL
2432 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2433 bfd_get_filename (exec_bfd
)) == 0)
2435 /* Reload EXEC_BFD without asking anything. */
2437 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2440 /* Keep the calls order approx. the same as in free_objfile. */
2442 /* Free the separate debug objfiles. It will be
2443 automatically recreated by sym_read. */
2444 free_objfile_separate_debug (objfile
);
2446 /* Remove any references to this objfile in the global
2448 preserve_values (objfile
);
2450 /* Nuke all the state that we will re-read. Much of the following
2451 code which sets things to NULL really is necessary to tell
2452 other parts of GDB that there is nothing currently there.
2454 Try to keep the freeing order compatible with free_objfile. */
2456 if (objfile
->sf
!= NULL
)
2458 (*objfile
->sf
->sym_finish
) (objfile
);
2461 clear_objfile_data (objfile
);
2463 /* Clean up any state BFD has sitting around. */
2465 struct bfd
*obfd
= objfile
->obfd
;
2467 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2468 /* Open the new BFD before freeing the old one, so that
2469 the filename remains live. */
2470 objfile
->obfd
= gdb_bfd_open_maybe_remote (obfd_filename
);
2471 if (objfile
->obfd
== NULL
)
2473 /* We have to make a cleanup and error here, rather
2474 than erroring later, because once we unref OBFD,
2475 OBFD_FILENAME will be freed. */
2476 make_cleanup_bfd_unref (obfd
);
2477 error (_("Can't open %s to read symbols."), obfd_filename
);
2479 gdb_bfd_unref (obfd
);
2482 objfile
->name
= bfd_get_filename (objfile
->obfd
);
2483 /* bfd_openr sets cacheable to true, which is what we want. */
2484 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2485 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2486 bfd_errmsg (bfd_get_error ()));
2488 /* Save the offsets, we will nuke them with the rest of the
2490 num_offsets
= objfile
->num_sections
;
2491 offsets
= ((struct section_offsets
*)
2492 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2493 memcpy (offsets
, objfile
->section_offsets
,
2494 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2496 /* FIXME: Do we have to free a whole linked list, or is this
2498 if (objfile
->global_psymbols
.list
)
2499 xfree (objfile
->global_psymbols
.list
);
2500 memset (&objfile
->global_psymbols
, 0,
2501 sizeof (objfile
->global_psymbols
));
2502 if (objfile
->static_psymbols
.list
)
2503 xfree (objfile
->static_psymbols
.list
);
2504 memset (&objfile
->static_psymbols
, 0,
2505 sizeof (objfile
->static_psymbols
));
2507 /* Free the obstacks for non-reusable objfiles. */
2508 psymbol_bcache_free (objfile
->psymbol_cache
);
2509 objfile
->psymbol_cache
= psymbol_bcache_init ();
2510 if (objfile
->demangled_names_hash
!= NULL
)
2512 htab_delete (objfile
->demangled_names_hash
);
2513 objfile
->demangled_names_hash
= NULL
;
2515 obstack_free (&objfile
->objfile_obstack
, 0);
2516 objfile
->sections
= NULL
;
2517 objfile
->symtabs
= NULL
;
2518 objfile
->psymtabs
= NULL
;
2519 objfile
->psymtabs_addrmap
= NULL
;
2520 objfile
->free_psymtabs
= NULL
;
2521 objfile
->template_symbols
= NULL
;
2522 objfile
->msymbols
= NULL
;
2523 objfile
->minimal_symbol_count
= 0;
2524 memset (&objfile
->msymbol_hash
, 0,
2525 sizeof (objfile
->msymbol_hash
));
2526 memset (&objfile
->msymbol_demangled_hash
, 0,
2527 sizeof (objfile
->msymbol_demangled_hash
));
2529 set_objfile_per_bfd (objfile
);
2531 /* obstack_init also initializes the obstack so it is
2532 empty. We could use obstack_specify_allocation but
2533 gdb_obstack.h specifies the alloc/dealloc functions. */
2534 obstack_init (&objfile
->objfile_obstack
);
2535 build_objfile_section_table (objfile
);
2536 terminate_minimal_symbol_table (objfile
);
2538 /* We use the same section offsets as from last time. I'm not
2539 sure whether that is always correct for shared libraries. */
2540 objfile
->section_offsets
= (struct section_offsets
*)
2541 obstack_alloc (&objfile
->objfile_obstack
,
2542 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2543 memcpy (objfile
->section_offsets
, offsets
,
2544 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2545 objfile
->num_sections
= num_offsets
;
2547 /* What the hell is sym_new_init for, anyway? The concept of
2548 distinguishing between the main file and additional files
2549 in this way seems rather dubious. */
2550 if (objfile
== symfile_objfile
)
2552 (*objfile
->sf
->sym_new_init
) (objfile
);
2555 (*objfile
->sf
->sym_init
) (objfile
);
2556 clear_complaints (&symfile_complaints
, 1, 1);
2558 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2559 read_symbols (objfile
, 0);
2561 if (!objfile_has_symbols (objfile
))
2564 printf_unfiltered (_("(no debugging symbols found)\n"));
2568 /* We're done reading the symbol file; finish off complaints. */
2569 clear_complaints (&symfile_complaints
, 0, 1);
2571 /* Getting new symbols may change our opinion about what is
2574 reinit_frame_cache ();
2576 /* Discard cleanups as symbol reading was successful. */
2577 discard_cleanups (old_cleanups
);
2579 /* If the mtime has changed between the time we set new_modtime
2580 and now, we *want* this to be out of date, so don't call stat
2582 objfile
->mtime
= new_modtime
;
2583 init_entry_point_info (objfile
);
2585 VEC_safe_push (objfilep
, new_objfiles
, objfile
);
2593 /* Notify objfiles that we've modified objfile sections. */
2594 objfiles_changed ();
2596 clear_symtab_users (0);
2598 /* clear_objfile_data for each objfile was called before freeing it and
2599 observer_notify_new_objfile (NULL) has been called by
2600 clear_symtab_users above. Notify the new files now. */
2601 for (ix
= 0; VEC_iterate (objfilep
, new_objfiles
, ix
, objfile
); ix
++)
2602 observer_notify_new_objfile (objfile
);
2604 /* At least one objfile has changed, so we can consider that
2605 the executable we're debugging has changed too. */
2606 observer_notify_executable_changed ();
2609 do_cleanups (all_cleanups
);
2621 static filename_language
*filename_language_table
;
2622 static int fl_table_size
, fl_table_next
;
2625 add_filename_language (char *ext
, enum language lang
)
2627 if (fl_table_next
>= fl_table_size
)
2629 fl_table_size
+= 10;
2630 filename_language_table
=
2631 xrealloc (filename_language_table
,
2632 fl_table_size
* sizeof (*filename_language_table
));
2635 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2636 filename_language_table
[fl_table_next
].lang
= lang
;
2640 static char *ext_args
;
2642 show_ext_args (struct ui_file
*file
, int from_tty
,
2643 struct cmd_list_element
*c
, const char *value
)
2645 fprintf_filtered (file
,
2646 _("Mapping between filename extension "
2647 "and source language is \"%s\".\n"),
2652 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2655 char *cp
= ext_args
;
2658 /* First arg is filename extension, starting with '.' */
2660 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2662 /* Find end of first arg. */
2663 while (*cp
&& !isspace (*cp
))
2667 error (_("'%s': two arguments required -- "
2668 "filename extension and language"),
2671 /* Null-terminate first arg. */
2674 /* Find beginning of second arg, which should be a source language. */
2675 cp
= skip_spaces (cp
);
2678 error (_("'%s': two arguments required -- "
2679 "filename extension and language"),
2682 /* Lookup the language from among those we know. */
2683 lang
= language_enum (cp
);
2685 /* Now lookup the filename extension: do we already know it? */
2686 for (i
= 0; i
< fl_table_next
; i
++)
2687 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2690 if (i
>= fl_table_next
)
2692 /* New file extension. */
2693 add_filename_language (ext_args
, lang
);
2697 /* Redefining a previously known filename extension. */
2700 /* query ("Really make files of type %s '%s'?", */
2701 /* ext_args, language_str (lang)); */
2703 xfree (filename_language_table
[i
].ext
);
2704 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2705 filename_language_table
[i
].lang
= lang
;
2710 info_ext_lang_command (char *args
, int from_tty
)
2714 printf_filtered (_("Filename extensions and the languages they represent:"));
2715 printf_filtered ("\n\n");
2716 for (i
= 0; i
< fl_table_next
; i
++)
2717 printf_filtered ("\t%s\t- %s\n",
2718 filename_language_table
[i
].ext
,
2719 language_str (filename_language_table
[i
].lang
));
2723 init_filename_language_table (void)
2725 if (fl_table_size
== 0) /* Protect against repetition. */
2729 filename_language_table
=
2730 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2731 add_filename_language (".c", language_c
);
2732 add_filename_language (".d", language_d
);
2733 add_filename_language (".C", language_cplus
);
2734 add_filename_language (".cc", language_cplus
);
2735 add_filename_language (".cp", language_cplus
);
2736 add_filename_language (".cpp", language_cplus
);
2737 add_filename_language (".cxx", language_cplus
);
2738 add_filename_language (".c++", language_cplus
);
2739 add_filename_language (".java", language_java
);
2740 add_filename_language (".class", language_java
);
2741 add_filename_language (".m", language_objc
);
2742 add_filename_language (".f", language_fortran
);
2743 add_filename_language (".F", language_fortran
);
2744 add_filename_language (".for", language_fortran
);
2745 add_filename_language (".FOR", language_fortran
);
2746 add_filename_language (".ftn", language_fortran
);
2747 add_filename_language (".FTN", language_fortran
);
2748 add_filename_language (".fpp", language_fortran
);
2749 add_filename_language (".FPP", language_fortran
);
2750 add_filename_language (".f90", language_fortran
);
2751 add_filename_language (".F90", language_fortran
);
2752 add_filename_language (".f95", language_fortran
);
2753 add_filename_language (".F95", language_fortran
);
2754 add_filename_language (".f03", language_fortran
);
2755 add_filename_language (".F03", language_fortran
);
2756 add_filename_language (".f08", language_fortran
);
2757 add_filename_language (".F08", language_fortran
);
2758 add_filename_language (".s", language_asm
);
2759 add_filename_language (".sx", language_asm
);
2760 add_filename_language (".S", language_asm
);
2761 add_filename_language (".pas", language_pascal
);
2762 add_filename_language (".p", language_pascal
);
2763 add_filename_language (".pp", language_pascal
);
2764 add_filename_language (".adb", language_ada
);
2765 add_filename_language (".ads", language_ada
);
2766 add_filename_language (".a", language_ada
);
2767 add_filename_language (".ada", language_ada
);
2768 add_filename_language (".dg", language_ada
);
2773 deduce_language_from_filename (const char *filename
)
2778 if (filename
!= NULL
)
2779 if ((cp
= strrchr (filename
, '.')) != NULL
)
2780 for (i
= 0; i
< fl_table_next
; i
++)
2781 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2782 return filename_language_table
[i
].lang
;
2784 return language_unknown
;
2789 Allocate and partly initialize a new symbol table. Return a pointer
2790 to it. error() if no space.
2792 Caller must set these fields:
2801 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2803 struct symtab
*symtab
;
2805 symtab
= (struct symtab
*)
2806 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2807 memset (symtab
, 0, sizeof (*symtab
));
2808 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2809 objfile
->per_bfd
->filename_cache
);
2810 symtab
->fullname
= NULL
;
2811 symtab
->language
= deduce_language_from_filename (filename
);
2812 symtab
->debugformat
= "unknown";
2814 /* Hook it to the objfile it comes from. */
2816 symtab
->objfile
= objfile
;
2817 symtab
->next
= objfile
->symtabs
;
2818 objfile
->symtabs
= symtab
;
2820 if (symtab_create_debug
)
2822 /* Be a bit clever with debugging messages, and don't print objfile
2823 every time, only when it changes. */
2824 static char *last_objfile_name
= NULL
;
2826 if (last_objfile_name
== NULL
2827 || strcmp (last_objfile_name
, objfile
->name
) != 0)
2829 xfree (last_objfile_name
);
2830 last_objfile_name
= xstrdup (objfile
->name
);
2831 fprintf_unfiltered (gdb_stdlog
,
2832 "Creating one or more symtabs for objfile %s ...\n",
2835 fprintf_unfiltered (gdb_stdlog
,
2836 "Created symtab %s for module %s.\n",
2837 host_address_to_string (symtab
), filename
);
2844 /* Reset all data structures in gdb which may contain references to symbol
2845 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2848 clear_symtab_users (int add_flags
)
2850 /* Someday, we should do better than this, by only blowing away
2851 the things that really need to be blown. */
2853 /* Clear the "current" symtab first, because it is no longer valid.
2854 breakpoint_re_set may try to access the current symtab. */
2855 clear_current_source_symtab_and_line ();
2858 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2859 breakpoint_re_set ();
2860 clear_last_displayed_sal ();
2861 clear_pc_function_cache ();
2862 observer_notify_new_objfile (NULL
);
2864 /* Clear globals which might have pointed into a removed objfile.
2865 FIXME: It's not clear which of these are supposed to persist
2866 between expressions and which ought to be reset each time. */
2867 expression_context_block
= NULL
;
2868 innermost_block
= NULL
;
2870 /* Varobj may refer to old symbols, perform a cleanup. */
2871 varobj_invalidate ();
2876 clear_symtab_users_cleanup (void *ignore
)
2878 clear_symtab_users (0);
2882 The following code implements an abstraction for debugging overlay sections.
2884 The target model is as follows:
2885 1) The gnu linker will permit multiple sections to be mapped into the
2886 same VMA, each with its own unique LMA (or load address).
2887 2) It is assumed that some runtime mechanism exists for mapping the
2888 sections, one by one, from the load address into the VMA address.
2889 3) This code provides a mechanism for gdb to keep track of which
2890 sections should be considered to be mapped from the VMA to the LMA.
2891 This information is used for symbol lookup, and memory read/write.
2892 For instance, if a section has been mapped then its contents
2893 should be read from the VMA, otherwise from the LMA.
2895 Two levels of debugger support for overlays are available. One is
2896 "manual", in which the debugger relies on the user to tell it which
2897 overlays are currently mapped. This level of support is
2898 implemented entirely in the core debugger, and the information about
2899 whether a section is mapped is kept in the objfile->obj_section table.
2901 The second level of support is "automatic", and is only available if
2902 the target-specific code provides functionality to read the target's
2903 overlay mapping table, and translate its contents for the debugger
2904 (by updating the mapped state information in the obj_section tables).
2906 The interface is as follows:
2908 overlay map <name> -- tell gdb to consider this section mapped
2909 overlay unmap <name> -- tell gdb to consider this section unmapped
2910 overlay list -- list the sections that GDB thinks are mapped
2911 overlay read-target -- get the target's state of what's mapped
2912 overlay off/manual/auto -- set overlay debugging state
2913 Functional interface:
2914 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2915 section, return that section.
2916 find_pc_overlay(pc): find any overlay section that contains
2917 the pc, either in its VMA or its LMA
2918 section_is_mapped(sect): true if overlay is marked as mapped
2919 section_is_overlay(sect): true if section's VMA != LMA
2920 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2921 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2922 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2923 overlay_mapped_address(...): map an address from section's LMA to VMA
2924 overlay_unmapped_address(...): map an address from section's VMA to LMA
2925 symbol_overlayed_address(...): Return a "current" address for symbol:
2926 either in VMA or LMA depending on whether
2927 the symbol's section is currently mapped. */
2929 /* Overlay debugging state: */
2931 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2932 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2934 /* Function: section_is_overlay (SECTION)
2935 Returns true if SECTION has VMA not equal to LMA, ie.
2936 SECTION is loaded at an address different from where it will "run". */
2939 section_is_overlay (struct obj_section
*section
)
2941 if (overlay_debugging
&& section
)
2943 bfd
*abfd
= section
->objfile
->obfd
;
2944 asection
*bfd_section
= section
->the_bfd_section
;
2946 if (bfd_section_lma (abfd
, bfd_section
) != 0
2947 && bfd_section_lma (abfd
, bfd_section
)
2948 != bfd_section_vma (abfd
, bfd_section
))
2955 /* Function: overlay_invalidate_all (void)
2956 Invalidate the mapped state of all overlay sections (mark it as stale). */
2959 overlay_invalidate_all (void)
2961 struct objfile
*objfile
;
2962 struct obj_section
*sect
;
2964 ALL_OBJSECTIONS (objfile
, sect
)
2965 if (section_is_overlay (sect
))
2966 sect
->ovly_mapped
= -1;
2969 /* Function: section_is_mapped (SECTION)
2970 Returns true if section is an overlay, and is currently mapped.
2972 Access to the ovly_mapped flag is restricted to this function, so
2973 that we can do automatic update. If the global flag
2974 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2975 overlay_invalidate_all. If the mapped state of the particular
2976 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2979 section_is_mapped (struct obj_section
*osect
)
2981 struct gdbarch
*gdbarch
;
2983 if (osect
== 0 || !section_is_overlay (osect
))
2986 switch (overlay_debugging
)
2990 return 0; /* overlay debugging off */
2991 case ovly_auto
: /* overlay debugging automatic */
2992 /* Unles there is a gdbarch_overlay_update function,
2993 there's really nothing useful to do here (can't really go auto). */
2994 gdbarch
= get_objfile_arch (osect
->objfile
);
2995 if (gdbarch_overlay_update_p (gdbarch
))
2997 if (overlay_cache_invalid
)
2999 overlay_invalidate_all ();
3000 overlay_cache_invalid
= 0;
3002 if (osect
->ovly_mapped
== -1)
3003 gdbarch_overlay_update (gdbarch
, osect
);
3005 /* fall thru to manual case */
3006 case ovly_on
: /* overlay debugging manual */
3007 return osect
->ovly_mapped
== 1;
3011 /* Function: pc_in_unmapped_range
3012 If PC falls into the lma range of SECTION, return true, else false. */
3015 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3017 if (section_is_overlay (section
))
3019 bfd
*abfd
= section
->objfile
->obfd
;
3020 asection
*bfd_section
= section
->the_bfd_section
;
3022 /* We assume the LMA is relocated by the same offset as the VMA. */
3023 bfd_vma size
= bfd_get_section_size (bfd_section
);
3024 CORE_ADDR offset
= obj_section_offset (section
);
3026 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3027 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3034 /* Function: pc_in_mapped_range
3035 If PC falls into the vma range of SECTION, return true, else false. */
3038 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3040 if (section_is_overlay (section
))
3042 if (obj_section_addr (section
) <= pc
3043 && pc
< obj_section_endaddr (section
))
3051 /* Return true if the mapped ranges of sections A and B overlap, false
3054 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3056 CORE_ADDR a_start
= obj_section_addr (a
);
3057 CORE_ADDR a_end
= obj_section_endaddr (a
);
3058 CORE_ADDR b_start
= obj_section_addr (b
);
3059 CORE_ADDR b_end
= obj_section_endaddr (b
);
3061 return (a_start
< b_end
&& b_start
< a_end
);
3064 /* Function: overlay_unmapped_address (PC, SECTION)
3065 Returns the address corresponding to PC in the unmapped (load) range.
3066 May be the same as PC. */
3069 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3071 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3073 bfd
*abfd
= section
->objfile
->obfd
;
3074 asection
*bfd_section
= section
->the_bfd_section
;
3076 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3077 - bfd_section_vma (abfd
, bfd_section
);
3083 /* Function: overlay_mapped_address (PC, SECTION)
3084 Returns the address corresponding to PC in the mapped (runtime) range.
3085 May be the same as PC. */
3088 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3090 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3092 bfd
*abfd
= section
->objfile
->obfd
;
3093 asection
*bfd_section
= section
->the_bfd_section
;
3095 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3096 - bfd_section_lma (abfd
, bfd_section
);
3103 /* Function: symbol_overlayed_address
3104 Return one of two addresses (relative to the VMA or to the LMA),
3105 depending on whether the section is mapped or not. */
3108 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3110 if (overlay_debugging
)
3112 /* If the symbol has no section, just return its regular address. */
3115 /* If the symbol's section is not an overlay, just return its
3117 if (!section_is_overlay (section
))
3119 /* If the symbol's section is mapped, just return its address. */
3120 if (section_is_mapped (section
))
3123 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3124 * then return its LOADED address rather than its vma address!!
3126 return overlay_unmapped_address (address
, section
);
3131 /* Function: find_pc_overlay (PC)
3132 Return the best-match overlay section for PC:
3133 If PC matches a mapped overlay section's VMA, return that section.
3134 Else if PC matches an unmapped section's VMA, return that section.
3135 Else if PC matches an unmapped section's LMA, return that section. */
3137 struct obj_section
*
3138 find_pc_overlay (CORE_ADDR pc
)
3140 struct objfile
*objfile
;
3141 struct obj_section
*osect
, *best_match
= NULL
;
3143 if (overlay_debugging
)
3144 ALL_OBJSECTIONS (objfile
, osect
)
3145 if (section_is_overlay (osect
))
3147 if (pc_in_mapped_range (pc
, osect
))
3149 if (section_is_mapped (osect
))
3154 else if (pc_in_unmapped_range (pc
, osect
))
3160 /* Function: find_pc_mapped_section (PC)
3161 If PC falls into the VMA address range of an overlay section that is
3162 currently marked as MAPPED, return that section. Else return NULL. */
3164 struct obj_section
*
3165 find_pc_mapped_section (CORE_ADDR pc
)
3167 struct objfile
*objfile
;
3168 struct obj_section
*osect
;
3170 if (overlay_debugging
)
3171 ALL_OBJSECTIONS (objfile
, osect
)
3172 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3178 /* Function: list_overlays_command
3179 Print a list of mapped sections and their PC ranges. */
3182 list_overlays_command (char *args
, int from_tty
)
3185 struct objfile
*objfile
;
3186 struct obj_section
*osect
;
3188 if (overlay_debugging
)
3189 ALL_OBJSECTIONS (objfile
, osect
)
3190 if (section_is_mapped (osect
))
3192 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3197 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3198 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3199 size
= bfd_get_section_size (osect
->the_bfd_section
);
3200 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3202 printf_filtered ("Section %s, loaded at ", name
);
3203 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3204 puts_filtered (" - ");
3205 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3206 printf_filtered (", mapped at ");
3207 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3208 puts_filtered (" - ");
3209 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3210 puts_filtered ("\n");
3215 printf_filtered (_("No sections are mapped.\n"));
3218 /* Function: map_overlay_command
3219 Mark the named section as mapped (ie. residing at its VMA address). */
3222 map_overlay_command (char *args
, int from_tty
)
3224 struct objfile
*objfile
, *objfile2
;
3225 struct obj_section
*sec
, *sec2
;
3227 if (!overlay_debugging
)
3228 error (_("Overlay debugging not enabled. Use "
3229 "either the 'overlay auto' or\n"
3230 "the 'overlay manual' command."));
3232 if (args
== 0 || *args
== 0)
3233 error (_("Argument required: name of an overlay section"));
3235 /* First, find a section matching the user supplied argument. */
3236 ALL_OBJSECTIONS (objfile
, sec
)
3237 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3239 /* Now, check to see if the section is an overlay. */
3240 if (!section_is_overlay (sec
))
3241 continue; /* not an overlay section */
3243 /* Mark the overlay as "mapped". */
3244 sec
->ovly_mapped
= 1;
3246 /* Next, make a pass and unmap any sections that are
3247 overlapped by this new section: */
3248 ALL_OBJSECTIONS (objfile2
, sec2
)
3249 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3252 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3253 bfd_section_name (objfile
->obfd
,
3254 sec2
->the_bfd_section
));
3255 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3259 error (_("No overlay section called %s"), args
);
3262 /* Function: unmap_overlay_command
3263 Mark the overlay section as unmapped
3264 (ie. resident in its LMA address range, rather than the VMA range). */
3267 unmap_overlay_command (char *args
, int from_tty
)
3269 struct objfile
*objfile
;
3270 struct obj_section
*sec
;
3272 if (!overlay_debugging
)
3273 error (_("Overlay debugging not enabled. "
3274 "Use either the 'overlay auto' or\n"
3275 "the 'overlay manual' command."));
3277 if (args
== 0 || *args
== 0)
3278 error (_("Argument required: name of an overlay section"));
3280 /* First, find a section matching the user supplied argument. */
3281 ALL_OBJSECTIONS (objfile
, sec
)
3282 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3284 if (!sec
->ovly_mapped
)
3285 error (_("Section %s is not mapped"), args
);
3286 sec
->ovly_mapped
= 0;
3289 error (_("No overlay section called %s"), args
);
3292 /* Function: overlay_auto_command
3293 A utility command to turn on overlay debugging.
3294 Possibly this should be done via a set/show command. */
3297 overlay_auto_command (char *args
, int from_tty
)
3299 overlay_debugging
= ovly_auto
;
3300 enable_overlay_breakpoints ();
3302 printf_unfiltered (_("Automatic overlay debugging enabled."));
3305 /* Function: overlay_manual_command
3306 A utility command to turn on overlay debugging.
3307 Possibly this should be done via a set/show command. */
3310 overlay_manual_command (char *args
, int from_tty
)
3312 overlay_debugging
= ovly_on
;
3313 disable_overlay_breakpoints ();
3315 printf_unfiltered (_("Overlay debugging enabled."));
3318 /* Function: overlay_off_command
3319 A utility command to turn on overlay debugging.
3320 Possibly this should be done via a set/show command. */
3323 overlay_off_command (char *args
, int from_tty
)
3325 overlay_debugging
= ovly_off
;
3326 disable_overlay_breakpoints ();
3328 printf_unfiltered (_("Overlay debugging disabled."));
3332 overlay_load_command (char *args
, int from_tty
)
3334 struct gdbarch
*gdbarch
= get_current_arch ();
3336 if (gdbarch_overlay_update_p (gdbarch
))
3337 gdbarch_overlay_update (gdbarch
, NULL
);
3339 error (_("This target does not know how to read its overlay state."));
3342 /* Function: overlay_command
3343 A place-holder for a mis-typed command. */
3345 /* Command list chain containing all defined "overlay" subcommands. */
3346 static struct cmd_list_element
*overlaylist
;
3349 overlay_command (char *args
, int from_tty
)
3352 ("\"overlay\" must be followed by the name of an overlay command.\n");
3353 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3357 /* Target Overlays for the "Simplest" overlay manager:
3359 This is GDB's default target overlay layer. It works with the
3360 minimal overlay manager supplied as an example by Cygnus. The
3361 entry point is via a function pointer "gdbarch_overlay_update",
3362 so targets that use a different runtime overlay manager can
3363 substitute their own overlay_update function and take over the
3366 The overlay_update function pokes around in the target's data structures
3367 to see what overlays are mapped, and updates GDB's overlay mapping with
3370 In this simple implementation, the target data structures are as follows:
3371 unsigned _novlys; /# number of overlay sections #/
3372 unsigned _ovly_table[_novlys][4] = {
3373 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3374 {..., ..., ..., ...},
3376 unsigned _novly_regions; /# number of overlay regions #/
3377 unsigned _ovly_region_table[_novly_regions][3] = {
3378 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3381 These functions will attempt to update GDB's mappedness state in the
3382 symbol section table, based on the target's mappedness state.
3384 To do this, we keep a cached copy of the target's _ovly_table, and
3385 attempt to detect when the cached copy is invalidated. The main
3386 entry point is "simple_overlay_update(SECT), which looks up SECT in
3387 the cached table and re-reads only the entry for that section from
3388 the target (whenever possible). */
3390 /* Cached, dynamically allocated copies of the target data structures: */
3391 static unsigned (*cache_ovly_table
)[4] = 0;
3392 static unsigned cache_novlys
= 0;
3393 static CORE_ADDR cache_ovly_table_base
= 0;
3396 VMA
, SIZE
, LMA
, MAPPED
3399 /* Throw away the cached copy of _ovly_table. */
3401 simple_free_overlay_table (void)
3403 if (cache_ovly_table
)
3404 xfree (cache_ovly_table
);
3406 cache_ovly_table
= NULL
;
3407 cache_ovly_table_base
= 0;
3410 /* Read an array of ints of size SIZE from the target into a local buffer.
3411 Convert to host order. int LEN is number of ints. */
3413 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3414 int len
, int size
, enum bfd_endian byte_order
)
3416 /* FIXME (alloca): Not safe if array is very large. */
3417 gdb_byte
*buf
= alloca (len
* size
);
3420 read_memory (memaddr
, buf
, len
* size
);
3421 for (i
= 0; i
< len
; i
++)
3422 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3425 /* Find and grab a copy of the target _ovly_table
3426 (and _novlys, which is needed for the table's size). */
3428 simple_read_overlay_table (void)
3430 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3431 struct gdbarch
*gdbarch
;
3433 enum bfd_endian byte_order
;
3435 simple_free_overlay_table ();
3436 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3439 error (_("Error reading inferior's overlay table: "
3440 "couldn't find `_novlys' variable\n"
3441 "in inferior. Use `overlay manual' mode."));
3445 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3446 if (! ovly_table_msym
)
3448 error (_("Error reading inferior's overlay table: couldn't find "
3449 "`_ovly_table' array\n"
3450 "in inferior. Use `overlay manual' mode."));
3454 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3455 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3456 byte_order
= gdbarch_byte_order (gdbarch
);
3458 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3461 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3462 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3463 read_target_long_array (cache_ovly_table_base
,
3464 (unsigned int *) cache_ovly_table
,
3465 cache_novlys
* 4, word_size
, byte_order
);
3467 return 1; /* SUCCESS */
3470 /* Function: simple_overlay_update_1
3471 A helper function for simple_overlay_update. Assuming a cached copy
3472 of _ovly_table exists, look through it to find an entry whose vma,
3473 lma and size match those of OSECT. Re-read the entry and make sure
3474 it still matches OSECT (else the table may no longer be valid).
3475 Set OSECT's mapped state to match the entry. Return: 1 for
3476 success, 0 for failure. */
3479 simple_overlay_update_1 (struct obj_section
*osect
)
3482 bfd
*obfd
= osect
->objfile
->obfd
;
3483 asection
*bsect
= osect
->the_bfd_section
;
3484 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3485 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3486 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3488 size
= bfd_get_section_size (osect
->the_bfd_section
);
3489 for (i
= 0; i
< cache_novlys
; i
++)
3490 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3491 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3492 /* && cache_ovly_table[i][SIZE] == size */ )
3494 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3495 (unsigned int *) cache_ovly_table
[i
],
3496 4, word_size
, byte_order
);
3497 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3498 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3499 /* && cache_ovly_table[i][SIZE] == size */ )
3501 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3504 else /* Warning! Warning! Target's ovly table has changed! */
3510 /* Function: simple_overlay_update
3511 If OSECT is NULL, then update all sections' mapped state
3512 (after re-reading the entire target _ovly_table).
3513 If OSECT is non-NULL, then try to find a matching entry in the
3514 cached ovly_table and update only OSECT's mapped state.
3515 If a cached entry can't be found or the cache isn't valid, then
3516 re-read the entire cache, and go ahead and update all sections. */
3519 simple_overlay_update (struct obj_section
*osect
)
3521 struct objfile
*objfile
;
3523 /* Were we given an osect to look up? NULL means do all of them. */
3525 /* Have we got a cached copy of the target's overlay table? */
3526 if (cache_ovly_table
!= NULL
)
3528 /* Does its cached location match what's currently in the
3530 struct minimal_symbol
*minsym
3531 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3534 error (_("Error reading inferior's overlay table: couldn't "
3535 "find `_ovly_table' array\n"
3536 "in inferior. Use `overlay manual' mode."));
3538 if (cache_ovly_table_base
== SYMBOL_VALUE_ADDRESS (minsym
))
3539 /* Then go ahead and try to look up this single section in
3541 if (simple_overlay_update_1 (osect
))
3542 /* Found it! We're done. */
3546 /* Cached table no good: need to read the entire table anew.
3547 Or else we want all the sections, in which case it's actually
3548 more efficient to read the whole table in one block anyway. */
3550 if (! simple_read_overlay_table ())
3553 /* Now may as well update all sections, even if only one was requested. */
3554 ALL_OBJSECTIONS (objfile
, osect
)
3555 if (section_is_overlay (osect
))
3558 bfd
*obfd
= osect
->objfile
->obfd
;
3559 asection
*bsect
= osect
->the_bfd_section
;
3561 size
= bfd_get_section_size (bsect
);
3562 for (i
= 0; i
< cache_novlys
; i
++)
3563 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3564 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3565 /* && cache_ovly_table[i][SIZE] == size */ )
3566 { /* obj_section matches i'th entry in ovly_table. */
3567 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3568 break; /* finished with inner for loop: break out. */
3573 /* Set the output sections and output offsets for section SECTP in
3574 ABFD. The relocation code in BFD will read these offsets, so we
3575 need to be sure they're initialized. We map each section to itself,
3576 with no offset; this means that SECTP->vma will be honored. */
3579 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3581 sectp
->output_section
= sectp
;
3582 sectp
->output_offset
= 0;
3585 /* Default implementation for sym_relocate. */
3589 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3592 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3594 bfd
*abfd
= sectp
->owner
;
3596 /* We're only interested in sections with relocation
3598 if ((sectp
->flags
& SEC_RELOC
) == 0)
3601 /* We will handle section offsets properly elsewhere, so relocate as if
3602 all sections begin at 0. */
3603 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3605 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3608 /* Relocate the contents of a debug section SECTP in ABFD. The
3609 contents are stored in BUF if it is non-NULL, or returned in a
3610 malloc'd buffer otherwise.
3612 For some platforms and debug info formats, shared libraries contain
3613 relocations against the debug sections (particularly for DWARF-2;
3614 one affected platform is PowerPC GNU/Linux, although it depends on
3615 the version of the linker in use). Also, ELF object files naturally
3616 have unresolved relocations for their debug sections. We need to apply
3617 the relocations in order to get the locations of symbols correct.
3618 Another example that may require relocation processing, is the
3619 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3623 symfile_relocate_debug_section (struct objfile
*objfile
,
3624 asection
*sectp
, bfd_byte
*buf
)
3626 gdb_assert (objfile
->sf
->sym_relocate
);
3628 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3631 struct symfile_segment_data
*
3632 get_symfile_segment_data (bfd
*abfd
)
3634 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3639 return sf
->sym_segments (abfd
);
3643 free_symfile_segment_data (struct symfile_segment_data
*data
)
3645 xfree (data
->segment_bases
);
3646 xfree (data
->segment_sizes
);
3647 xfree (data
->segment_info
);
3653 - DATA, containing segment addresses from the object file ABFD, and
3654 the mapping from ABFD's sections onto the segments that own them,
3656 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3657 segment addresses reported by the target,
3658 store the appropriate offsets for each section in OFFSETS.
3660 If there are fewer entries in SEGMENT_BASES than there are segments
3661 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3663 If there are more entries, then ignore the extra. The target may
3664 not be able to distinguish between an empty data segment and a
3665 missing data segment; a missing text segment is less plausible. */
3667 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3668 struct section_offsets
*offsets
,
3669 int num_segment_bases
,
3670 const CORE_ADDR
*segment_bases
)
3675 /* It doesn't make sense to call this function unless you have some
3676 segment base addresses. */
3677 gdb_assert (num_segment_bases
> 0);
3679 /* If we do not have segment mappings for the object file, we
3680 can not relocate it by segments. */
3681 gdb_assert (data
!= NULL
);
3682 gdb_assert (data
->num_segments
> 0);
3684 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3686 int which
= data
->segment_info
[i
];
3688 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3690 /* Don't bother computing offsets for sections that aren't
3691 loaded as part of any segment. */
3695 /* Use the last SEGMENT_BASES entry as the address of any extra
3696 segments mentioned in DATA->segment_info. */
3697 if (which
> num_segment_bases
)
3698 which
= num_segment_bases
;
3700 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3701 - data
->segment_bases
[which
- 1]);
3708 symfile_find_segment_sections (struct objfile
*objfile
)
3710 bfd
*abfd
= objfile
->obfd
;
3713 struct symfile_segment_data
*data
;
3715 data
= get_symfile_segment_data (objfile
->obfd
);
3719 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3721 free_symfile_segment_data (data
);
3725 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3727 int which
= data
->segment_info
[i
];
3731 if (objfile
->sect_index_text
== -1)
3732 objfile
->sect_index_text
= sect
->index
;
3734 if (objfile
->sect_index_rodata
== -1)
3735 objfile
->sect_index_rodata
= sect
->index
;
3737 else if (which
== 2)
3739 if (objfile
->sect_index_data
== -1)
3740 objfile
->sect_index_data
= sect
->index
;
3742 if (objfile
->sect_index_bss
== -1)
3743 objfile
->sect_index_bss
= sect
->index
;
3747 free_symfile_segment_data (data
);
3751 _initialize_symfile (void)
3753 struct cmd_list_element
*c
;
3755 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3756 Load symbol table from executable file FILE.\n\
3757 The `file' command can also load symbol tables, as well as setting the file\n\
3758 to execute."), &cmdlist
);
3759 set_cmd_completer (c
, filename_completer
);
3761 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3762 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3763 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3764 ...]\nADDR is the starting address of the file's text.\n\
3765 The optional arguments are section-name section-address pairs and\n\
3766 should be specified if the data and bss segments are not contiguous\n\
3767 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3769 set_cmd_completer (c
, filename_completer
);
3771 c
= add_cmd ("load", class_files
, load_command
, _("\
3772 Dynamically load FILE into the running program, and record its symbols\n\
3773 for access from GDB.\n\
3774 A load OFFSET may also be given."), &cmdlist
);
3775 set_cmd_completer (c
, filename_completer
);
3777 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3778 _("Commands for debugging overlays."), &overlaylist
,
3779 "overlay ", 0, &cmdlist
);
3781 add_com_alias ("ovly", "overlay", class_alias
, 1);
3782 add_com_alias ("ov", "overlay", class_alias
, 1);
3784 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3785 _("Assert that an overlay section is mapped."), &overlaylist
);
3787 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3788 _("Assert that an overlay section is unmapped."), &overlaylist
);
3790 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3791 _("List mappings of overlay sections."), &overlaylist
);
3793 add_cmd ("manual", class_support
, overlay_manual_command
,
3794 _("Enable overlay debugging."), &overlaylist
);
3795 add_cmd ("off", class_support
, overlay_off_command
,
3796 _("Disable overlay debugging."), &overlaylist
);
3797 add_cmd ("auto", class_support
, overlay_auto_command
,
3798 _("Enable automatic overlay debugging."), &overlaylist
);
3799 add_cmd ("load-target", class_support
, overlay_load_command
,
3800 _("Read the overlay mapping state from the target."), &overlaylist
);
3802 /* Filename extension to source language lookup table: */
3803 init_filename_language_table ();
3804 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3806 Set mapping between filename extension and source language."), _("\
3807 Show mapping between filename extension and source language."), _("\
3808 Usage: set extension-language .foo bar"),
3809 set_ext_lang_command
,
3811 &setlist
, &showlist
);
3813 add_info ("extensions", info_ext_lang_command
,
3814 _("All filename extensions associated with a source language."));
3816 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3817 &debug_file_directory
, _("\
3818 Set the directories where separate debug symbols are searched for."), _("\
3819 Show the directories where separate debug symbols are searched for."), _("\
3820 Separate debug symbols are first searched for in the same\n\
3821 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3822 and lastly at the path of the directory of the binary with\n\
3823 each global debug-file-directory component prepended."),
3825 show_debug_file_directory
,
3826 &setlist
, &showlist
);