1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2013 Free Software Foundation, Inc.
5 Contributed by Cygnus Support, using pieces from other GDB modules.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "arch-utils.h"
35 #include "breakpoint.h"
37 #include "complaints.h"
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
47 #include "readline/readline.h"
48 #include "gdb_assert.h"
52 #include "parser-defs.h"
59 #include "cli/cli-utils.h"
61 #include <sys/types.h>
63 #include "gdb_string.h"
71 int (*deprecated_ui_load_progress_hook
) (const char *section
,
73 void (*deprecated_show_load_progress
) (const char *section
,
74 unsigned long section_sent
,
75 unsigned long section_size
,
76 unsigned long total_sent
,
77 unsigned long total_size
);
78 void (*deprecated_pre_add_symbol_hook
) (const char *);
79 void (*deprecated_post_add_symbol_hook
) (void);
81 static void clear_symtab_users_cleanup (void *ignore
);
83 /* Global variables owned by this file. */
84 int readnow_symbol_files
; /* Read full symbols immediately. */
86 /* Functions this file defines. */
88 static void load_command (char *, int);
90 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
92 static void add_symbol_file_command (char *, int);
94 bfd
*symfile_bfd_open (char *);
96 int get_section_index (struct objfile
*, char *);
98 static const struct sym_fns
*find_sym_fns (bfd
*);
100 static void decrement_reading_symtab (void *);
102 static void overlay_invalidate_all (void);
104 static void overlay_auto_command (char *, int);
106 static void overlay_manual_command (char *, int);
108 static void overlay_off_command (char *, int);
110 static void overlay_load_command (char *, int);
112 static void overlay_command (char *, int);
114 static void simple_free_overlay_table (void);
116 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
119 static int simple_read_overlay_table (void);
121 static int simple_overlay_update_1 (struct obj_section
*);
123 static void add_filename_language (char *ext
, enum language lang
);
125 static void info_ext_lang_command (char *args
, int from_tty
);
127 static void init_filename_language_table (void);
129 static void symfile_find_segment_sections (struct objfile
*objfile
);
131 void _initialize_symfile (void);
133 /* List of all available sym_fns. On gdb startup, each object file reader
134 calls add_symtab_fns() to register information on each format it is
137 typedef const struct sym_fns
*sym_fns_ptr
;
138 DEF_VEC_P (sym_fns_ptr
);
140 static VEC (sym_fns_ptr
) *symtab_fns
= NULL
;
142 /* If non-zero, shared library symbols will be added automatically
143 when the inferior is created, new libraries are loaded, or when
144 attaching to the inferior. This is almost always what users will
145 want to have happen; but for very large programs, the startup time
146 will be excessive, and so if this is a problem, the user can clear
147 this flag and then add the shared library symbols as needed. Note
148 that there is a potential for confusion, since if the shared
149 library symbols are not loaded, commands like "info fun" will *not*
150 report all the functions that are actually present. */
152 int auto_solib_add
= 1;
155 /* True if we are reading a symbol table. */
157 int currently_reading_symtab
= 0;
160 decrement_reading_symtab (void *dummy
)
162 currently_reading_symtab
--;
165 /* Increment currently_reading_symtab and return a cleanup that can be
166 used to decrement it. */
168 increment_reading_symtab (void)
170 ++currently_reading_symtab
;
171 return make_cleanup (decrement_reading_symtab
, NULL
);
174 /* Remember the lowest-addressed loadable section we've seen.
175 This function is called via bfd_map_over_sections.
177 In case of equal vmas, the section with the largest size becomes the
178 lowest-addressed loadable section.
180 If the vmas and sizes are equal, the last section is considered the
181 lowest-addressed loadable section. */
184 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
186 asection
**lowest
= (asection
**) obj
;
188 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
191 *lowest
= sect
; /* First loadable section */
192 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
193 *lowest
= sect
; /* A lower loadable section */
194 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
195 && (bfd_section_size (abfd
, (*lowest
))
196 <= bfd_section_size (abfd
, sect
)))
200 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
201 new object's 'num_sections' field is set to 0; it must be updated
204 struct section_addr_info
*
205 alloc_section_addr_info (size_t num_sections
)
207 struct section_addr_info
*sap
;
210 size
= (sizeof (struct section_addr_info
)
211 + sizeof (struct other_sections
) * (num_sections
- 1));
212 sap
= (struct section_addr_info
*) xmalloc (size
);
213 memset (sap
, 0, size
);
218 /* Build (allocate and populate) a section_addr_info struct from
219 an existing section table. */
221 extern struct section_addr_info
*
222 build_section_addr_info_from_section_table (const struct target_section
*start
,
223 const struct target_section
*end
)
225 struct section_addr_info
*sap
;
226 const struct target_section
*stp
;
229 sap
= alloc_section_addr_info (end
- start
);
231 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
233 if (bfd_get_section_flags (stp
->bfd
,
234 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
235 && oidx
< end
- start
)
237 sap
->other
[oidx
].addr
= stp
->addr
;
238 sap
->other
[oidx
].name
239 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
240 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
245 sap
->num_sections
= oidx
;
250 /* Create a section_addr_info from section offsets in ABFD. */
252 static struct section_addr_info
*
253 build_section_addr_info_from_bfd (bfd
*abfd
)
255 struct section_addr_info
*sap
;
257 struct bfd_section
*sec
;
259 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
260 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
261 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
263 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
264 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
265 sap
->other
[i
].sectindex
= sec
->index
;
269 sap
->num_sections
= i
;
274 /* Create a section_addr_info from section offsets in OBJFILE. */
276 struct section_addr_info
*
277 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
279 struct section_addr_info
*sap
;
282 /* Before reread_symbols gets rewritten it is not safe to call:
283 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
285 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
286 for (i
= 0; i
< sap
->num_sections
; i
++)
288 int sectindex
= sap
->other
[i
].sectindex
;
290 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
295 /* Free all memory allocated by build_section_addr_info_from_section_table. */
298 free_section_addr_info (struct section_addr_info
*sap
)
302 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
303 xfree (sap
->other
[idx
].name
);
308 /* Initialize OBJFILE's sect_index_* members. */
310 init_objfile_sect_indices (struct objfile
*objfile
)
315 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
317 objfile
->sect_index_text
= sect
->index
;
319 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
321 objfile
->sect_index_data
= sect
->index
;
323 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
325 objfile
->sect_index_bss
= sect
->index
;
327 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
329 objfile
->sect_index_rodata
= sect
->index
;
331 /* This is where things get really weird... We MUST have valid
332 indices for the various sect_index_* members or gdb will abort.
333 So if for example, there is no ".text" section, we have to
334 accomodate that. First, check for a file with the standard
335 one or two segments. */
337 symfile_find_segment_sections (objfile
);
339 /* Except when explicitly adding symbol files at some address,
340 section_offsets contains nothing but zeros, so it doesn't matter
341 which slot in section_offsets the individual sect_index_* members
342 index into. So if they are all zero, it is safe to just point
343 all the currently uninitialized indices to the first slot. But
344 beware: if this is the main executable, it may be relocated
345 later, e.g. by the remote qOffsets packet, and then this will
346 be wrong! That's why we try segments first. */
348 for (i
= 0; i
< objfile
->num_sections
; i
++)
350 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
355 if (i
== objfile
->num_sections
)
357 if (objfile
->sect_index_text
== -1)
358 objfile
->sect_index_text
= 0;
359 if (objfile
->sect_index_data
== -1)
360 objfile
->sect_index_data
= 0;
361 if (objfile
->sect_index_bss
== -1)
362 objfile
->sect_index_bss
= 0;
363 if (objfile
->sect_index_rodata
== -1)
364 objfile
->sect_index_rodata
= 0;
368 /* The arguments to place_section. */
370 struct place_section_arg
372 struct section_offsets
*offsets
;
376 /* Find a unique offset to use for loadable section SECT if
377 the user did not provide an offset. */
380 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
382 struct place_section_arg
*arg
= obj
;
383 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
385 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
387 /* We are only interested in allocated sections. */
388 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
391 /* If the user specified an offset, honor it. */
392 if (offsets
[sect
->index
] != 0)
395 /* Otherwise, let's try to find a place for the section. */
396 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
403 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
405 int indx
= cur_sec
->index
;
407 /* We don't need to compare against ourself. */
411 /* We can only conflict with allocated sections. */
412 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
415 /* If the section offset is 0, either the section has not been placed
416 yet, or it was the lowest section placed (in which case LOWEST
417 will be past its end). */
418 if (offsets
[indx
] == 0)
421 /* If this section would overlap us, then we must move up. */
422 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
423 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
425 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
426 start_addr
= (start_addr
+ align
- 1) & -align
;
431 /* Otherwise, we appear to be OK. So far. */
436 offsets
[sect
->index
] = start_addr
;
437 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
440 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
441 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
445 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
447 struct section_addr_info
*addrs
)
451 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
453 /* Now calculate offsets for section that were specified by the caller. */
454 for (i
= 0; i
< addrs
->num_sections
; i
++)
456 struct other_sections
*osp
;
458 osp
= &addrs
->other
[i
];
459 if (osp
->sectindex
== -1)
462 /* Record all sections in offsets. */
463 /* The section_offsets in the objfile are here filled in using
465 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
469 /* Transform section name S for a name comparison. prelink can split section
470 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
471 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
472 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
473 (`.sbss') section has invalid (increased) virtual address. */
476 addr_section_name (const char *s
)
478 if (strcmp (s
, ".dynbss") == 0)
480 if (strcmp (s
, ".sdynbss") == 0)
486 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
487 their (name, sectindex) pair. sectindex makes the sort by name stable. */
490 addrs_section_compar (const void *ap
, const void *bp
)
492 const struct other_sections
*a
= *((struct other_sections
**) ap
);
493 const struct other_sections
*b
= *((struct other_sections
**) bp
);
496 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
500 return a
->sectindex
- b
->sectindex
;
503 /* Provide sorted array of pointers to sections of ADDRS. The array is
504 terminated by NULL. Caller is responsible to call xfree for it. */
506 static struct other_sections
**
507 addrs_section_sort (struct section_addr_info
*addrs
)
509 struct other_sections
**array
;
512 /* `+ 1' for the NULL terminator. */
513 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
514 for (i
= 0; i
< addrs
->num_sections
; i
++)
515 array
[i
] = &addrs
->other
[i
];
518 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
523 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
524 also SECTINDEXes specific to ABFD there. This function can be used to
525 rebase ADDRS to start referencing different BFD than before. */
528 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
530 asection
*lower_sect
;
531 CORE_ADDR lower_offset
;
533 struct cleanup
*my_cleanup
;
534 struct section_addr_info
*abfd_addrs
;
535 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
536 struct other_sections
**addrs_to_abfd_addrs
;
538 /* Find lowest loadable section to be used as starting point for
539 continguous sections. */
541 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
542 if (lower_sect
== NULL
)
544 warning (_("no loadable sections found in added symbol-file %s"),
545 bfd_get_filename (abfd
));
549 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
551 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
552 in ABFD. Section names are not unique - there can be multiple sections of
553 the same name. Also the sections of the same name do not have to be
554 adjacent to each other. Some sections may be present only in one of the
555 files. Even sections present in both files do not have to be in the same
558 Use stable sort by name for the sections in both files. Then linearly
559 scan both lists matching as most of the entries as possible. */
561 addrs_sorted
= addrs_section_sort (addrs
);
562 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
564 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
565 make_cleanup_free_section_addr_info (abfd_addrs
);
566 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
567 make_cleanup (xfree
, abfd_addrs_sorted
);
569 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
570 ABFD_ADDRS_SORTED. */
572 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
573 * addrs
->num_sections
);
574 make_cleanup (xfree
, addrs_to_abfd_addrs
);
576 while (*addrs_sorted
)
578 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
580 while (*abfd_addrs_sorted
581 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
585 if (*abfd_addrs_sorted
586 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
591 /* Make the found item directly addressable from ADDRS. */
592 index_in_addrs
= *addrs_sorted
- addrs
->other
;
593 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
594 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
596 /* Never use the same ABFD entry twice. */
603 /* Calculate offsets for the loadable sections.
604 FIXME! Sections must be in order of increasing loadable section
605 so that contiguous sections can use the lower-offset!!!
607 Adjust offsets if the segments are not contiguous.
608 If the section is contiguous, its offset should be set to
609 the offset of the highest loadable section lower than it
610 (the loadable section directly below it in memory).
611 this_offset = lower_offset = lower_addr - lower_orig_addr */
613 for (i
= 0; i
< addrs
->num_sections
; i
++)
615 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
619 /* This is the index used by BFD. */
620 addrs
->other
[i
].sectindex
= sect
->sectindex
;
622 if (addrs
->other
[i
].addr
!= 0)
624 addrs
->other
[i
].addr
-= sect
->addr
;
625 lower_offset
= addrs
->other
[i
].addr
;
628 addrs
->other
[i
].addr
= lower_offset
;
632 /* addr_section_name transformation is not used for SECT_NAME. */
633 const char *sect_name
= addrs
->other
[i
].name
;
635 /* This section does not exist in ABFD, which is normally
636 unexpected and we want to issue a warning.
638 However, the ELF prelinker does create a few sections which are
639 marked in the main executable as loadable (they are loaded in
640 memory from the DYNAMIC segment) and yet are not present in
641 separate debug info files. This is fine, and should not cause
642 a warning. Shared libraries contain just the section
643 ".gnu.liblist" but it is not marked as loadable there. There is
644 no other way to identify them than by their name as the sections
645 created by prelink have no special flags.
647 For the sections `.bss' and `.sbss' see addr_section_name. */
649 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
650 || strcmp (sect_name
, ".gnu.conflict") == 0
651 || (strcmp (sect_name
, ".bss") == 0
653 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
654 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
655 || (strcmp (sect_name
, ".sbss") == 0
657 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
658 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
659 warning (_("section %s not found in %s"), sect_name
,
660 bfd_get_filename (abfd
));
662 addrs
->other
[i
].addr
= 0;
663 addrs
->other
[i
].sectindex
= -1;
667 do_cleanups (my_cleanup
);
670 /* Parse the user's idea of an offset for dynamic linking, into our idea
671 of how to represent it for fast symbol reading. This is the default
672 version of the sym_fns.sym_offsets function for symbol readers that
673 don't need to do anything special. It allocates a section_offsets table
674 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
677 default_symfile_offsets (struct objfile
*objfile
,
678 struct section_addr_info
*addrs
)
680 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
681 objfile
->section_offsets
= (struct section_offsets
*)
682 obstack_alloc (&objfile
->objfile_obstack
,
683 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
684 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
685 objfile
->num_sections
, addrs
);
687 /* For relocatable files, all loadable sections will start at zero.
688 The zero is meaningless, so try to pick arbitrary addresses such
689 that no loadable sections overlap. This algorithm is quadratic,
690 but the number of sections in a single object file is generally
692 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
694 struct place_section_arg arg
;
695 bfd
*abfd
= objfile
->obfd
;
698 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
699 /* We do not expect this to happen; just skip this step if the
700 relocatable file has a section with an assigned VMA. */
701 if (bfd_section_vma (abfd
, cur_sec
) != 0)
706 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
708 /* Pick non-overlapping offsets for sections the user did not
710 arg
.offsets
= objfile
->section_offsets
;
712 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
714 /* Correctly filling in the section offsets is not quite
715 enough. Relocatable files have two properties that
716 (most) shared objects do not:
718 - Their debug information will contain relocations. Some
719 shared libraries do also, but many do not, so this can not
722 - If there are multiple code sections they will be loaded
723 at different relative addresses in memory than they are
724 in the objfile, since all sections in the file will start
727 Because GDB has very limited ability to map from an
728 address in debug info to the correct code section,
729 it relies on adding SECT_OFF_TEXT to things which might be
730 code. If we clear all the section offsets, and set the
731 section VMAs instead, then symfile_relocate_debug_section
732 will return meaningful debug information pointing at the
735 GDB has too many different data structures for section
736 addresses - a bfd, objfile, and so_list all have section
737 tables, as does exec_ops. Some of these could probably
740 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
741 cur_sec
= cur_sec
->next
)
743 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
746 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
747 exec_set_section_address (bfd_get_filename (abfd
),
749 offsets
[cur_sec
->index
]);
750 offsets
[cur_sec
->index
] = 0;
755 /* Remember the bfd indexes for the .text, .data, .bss and
757 init_objfile_sect_indices (objfile
);
761 /* Divide the file into segments, which are individual relocatable units.
762 This is the default version of the sym_fns.sym_segments function for
763 symbol readers that do not have an explicit representation of segments.
764 It assumes that object files do not have segments, and fully linked
765 files have a single segment. */
767 struct symfile_segment_data
*
768 default_symfile_segments (bfd
*abfd
)
772 struct symfile_segment_data
*data
;
775 /* Relocatable files contain enough information to position each
776 loadable section independently; they should not be relocated
778 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
781 /* Make sure there is at least one loadable section in the file. */
782 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
784 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
792 low
= bfd_get_section_vma (abfd
, sect
);
793 high
= low
+ bfd_get_section_size (sect
);
795 data
= XZALLOC (struct symfile_segment_data
);
796 data
->num_segments
= 1;
797 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
798 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
800 num_sections
= bfd_count_sections (abfd
);
801 data
->segment_info
= XCALLOC (num_sections
, int);
803 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
807 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
810 vma
= bfd_get_section_vma (abfd
, sect
);
813 if (vma
+ bfd_get_section_size (sect
) > high
)
814 high
= vma
+ bfd_get_section_size (sect
);
816 data
->segment_info
[i
] = 1;
819 data
->segment_bases
[0] = low
;
820 data
->segment_sizes
[0] = high
- low
;
825 /* This is a convenience function to call sym_read for OBJFILE and
826 possibly force the partial symbols to be read. */
829 read_symbols (struct objfile
*objfile
, int add_flags
)
831 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
833 /* find_separate_debug_file_in_section should be called only if there is
834 single binary with no existing separate debug info file. */
835 if (!objfile_has_partial_symbols (objfile
)
836 && objfile
->separate_debug_objfile
== NULL
837 && objfile
->separate_debug_objfile_backlink
== NULL
)
839 bfd
*abfd
= find_separate_debug_file_in_section (objfile
);
840 struct cleanup
*cleanup
= make_cleanup_bfd_unref (abfd
);
843 symbol_file_add_separate (abfd
, add_flags
, objfile
);
845 do_cleanups (cleanup
);
847 if ((add_flags
& SYMFILE_NO_READ
) == 0)
848 require_partial_symbols (objfile
, 0);
851 /* Initialize entry point information for this objfile. */
854 init_entry_point_info (struct objfile
*objfile
)
856 /* Save startup file's range of PC addresses to help blockframe.c
857 decide where the bottom of the stack is. */
859 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
861 /* Executable file -- record its entry point so we'll recognize
862 the startup file because it contains the entry point. */
863 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
864 objfile
->ei
.entry_point_p
= 1;
866 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
867 && bfd_get_start_address (objfile
->obfd
) != 0)
869 /* Some shared libraries may have entry points set and be
870 runnable. There's no clear way to indicate this, so just check
871 for values other than zero. */
872 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
873 objfile
->ei
.entry_point_p
= 1;
877 /* Examination of non-executable.o files. Short-circuit this stuff. */
878 objfile
->ei
.entry_point_p
= 0;
881 if (objfile
->ei
.entry_point_p
)
883 CORE_ADDR entry_point
= objfile
->ei
.entry_point
;
885 /* Make certain that the address points at real code, and not a
886 function descriptor. */
888 = gdbarch_convert_from_func_ptr_addr (objfile
->gdbarch
,
892 /* Remove any ISA markers, so that this matches entries in the
894 objfile
->ei
.entry_point
895 = gdbarch_addr_bits_remove (objfile
->gdbarch
, entry_point
);
899 /* Process a symbol file, as either the main file or as a dynamically
902 This function does not set the OBJFILE's entry-point info.
904 OBJFILE is where the symbols are to be read from.
906 ADDRS is the list of section load addresses. If the user has given
907 an 'add-symbol-file' command, then this is the list of offsets and
908 addresses he or she provided as arguments to the command; or, if
909 we're handling a shared library, these are the actual addresses the
910 sections are loaded at, according to the inferior's dynamic linker
911 (as gleaned by GDB's shared library code). We convert each address
912 into an offset from the section VMA's as it appears in the object
913 file, and then call the file's sym_offsets function to convert this
914 into a format-specific offset table --- a `struct section_offsets'.
915 If ADDRS is non-zero, OFFSETS must be zero.
917 OFFSETS is a table of section offsets already in the right
918 format-specific representation. NUM_OFFSETS is the number of
919 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
920 assume this is the proper table the call to sym_offsets described
921 above would produce. Instead of calling sym_offsets, we just dump
922 it right into objfile->section_offsets. (When we're re-reading
923 symbols from an objfile, we don't have the original load address
924 list any more; all we have is the section offset table.) If
925 OFFSETS is non-zero, ADDRS must be zero.
927 ADD_FLAGS encodes verbosity level, whether this is main symbol or
928 an extra symbol file such as dynamically loaded code, and wether
929 breakpoint reset should be deferred. */
932 syms_from_objfile_1 (struct objfile
*objfile
,
933 struct section_addr_info
*addrs
,
934 struct section_offsets
*offsets
,
938 struct section_addr_info
*local_addr
= NULL
;
939 struct cleanup
*old_chain
;
940 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
942 gdb_assert (! (addrs
&& offsets
));
944 objfile
->sf
= find_sym_fns (objfile
->obfd
);
946 if (objfile
->sf
== NULL
)
948 /* No symbols to load, but we still need to make sure
949 that the section_offsets table is allocated. */
950 int num_sections
= bfd_count_sections (objfile
->obfd
);
951 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
953 objfile
->num_sections
= num_sections
;
954 objfile
->section_offsets
955 = obstack_alloc (&objfile
->objfile_obstack
, size
);
956 memset (objfile
->section_offsets
, 0, size
);
960 /* Make sure that partially constructed symbol tables will be cleaned up
961 if an error occurs during symbol reading. */
962 old_chain
= make_cleanup_free_objfile (objfile
);
964 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
965 list. We now establish the convention that an addr of zero means
966 no load address was specified. */
967 if (! addrs
&& ! offsets
)
970 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
971 make_cleanup (xfree
, local_addr
);
975 /* Now either addrs or offsets is non-zero. */
979 /* We will modify the main symbol table, make sure that all its users
980 will be cleaned up if an error occurs during symbol reading. */
981 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
983 /* Since no error yet, throw away the old symbol table. */
985 if (symfile_objfile
!= NULL
)
987 free_objfile (symfile_objfile
);
988 gdb_assert (symfile_objfile
== NULL
);
991 /* Currently we keep symbols from the add-symbol-file command.
992 If the user wants to get rid of them, they should do "symbol-file"
993 without arguments first. Not sure this is the best behavior
996 (*objfile
->sf
->sym_new_init
) (objfile
);
999 /* Convert addr into an offset rather than an absolute address.
1000 We find the lowest address of a loaded segment in the objfile,
1001 and assume that <addr> is where that got loaded.
1003 We no longer warn if the lowest section is not a text segment (as
1004 happens for the PA64 port. */
1005 if (addrs
&& addrs
->num_sections
> 0)
1006 addr_info_make_relative (addrs
, objfile
->obfd
);
1008 /* Initialize symbol reading routines for this objfile, allow complaints to
1009 appear for this new file, and record how verbose to be, then do the
1010 initial symbol reading for this file. */
1012 (*objfile
->sf
->sym_init
) (objfile
);
1013 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1016 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1019 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
1021 /* Just copy in the offset table directly as given to us. */
1022 objfile
->num_sections
= num_offsets
;
1023 objfile
->section_offsets
1024 = ((struct section_offsets
*)
1025 obstack_alloc (&objfile
->objfile_obstack
, size
));
1026 memcpy (objfile
->section_offsets
, offsets
, size
);
1028 init_objfile_sect_indices (objfile
);
1031 read_symbols (objfile
, add_flags
);
1033 /* Discard cleanups as symbol reading was successful. */
1035 discard_cleanups (old_chain
);
1039 /* Same as syms_from_objfile_1, but also initializes the objfile
1040 entry-point info. */
1043 syms_from_objfile (struct objfile
*objfile
,
1044 struct section_addr_info
*addrs
,
1045 struct section_offsets
*offsets
,
1049 syms_from_objfile_1 (objfile
, addrs
, offsets
, num_offsets
, add_flags
);
1050 init_entry_point_info (objfile
);
1053 /* Perform required actions after either reading in the initial
1054 symbols for a new objfile, or mapping in the symbols from a reusable
1055 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1058 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1060 /* If this is the main symbol file we have to clean up all users of the
1061 old main symbol file. Otherwise it is sufficient to fixup all the
1062 breakpoints that may have been redefined by this symbol file. */
1063 if (add_flags
& SYMFILE_MAINLINE
)
1065 /* OK, make it the "real" symbol file. */
1066 symfile_objfile
= objfile
;
1068 clear_symtab_users (add_flags
);
1070 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1072 breakpoint_re_set ();
1075 /* We're done reading the symbol file; finish off complaints. */
1076 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1079 /* Process a symbol file, as either the main file or as a dynamically
1082 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1083 A new reference is acquired by this function.
1085 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1086 extra, such as dynamically loaded code, and what to do with breakpoins.
1088 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1089 syms_from_objfile, above.
1090 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1092 PARENT is the original objfile if ABFD is a separate debug info file.
1093 Otherwise PARENT is NULL.
1095 Upon success, returns a pointer to the objfile that was added.
1096 Upon failure, jumps back to command level (never returns). */
1098 static struct objfile
*
1099 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1101 struct section_addr_info
*addrs
,
1102 struct section_offsets
*offsets
,
1104 int flags
, struct objfile
*parent
)
1106 struct objfile
*objfile
;
1107 const char *name
= bfd_get_filename (abfd
);
1108 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1109 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1110 const int should_print
= ((from_tty
|| info_verbose
)
1111 && (readnow_symbol_files
1112 || (add_flags
& SYMFILE_NO_READ
) == 0));
1114 if (readnow_symbol_files
)
1116 flags
|= OBJF_READNOW
;
1117 add_flags
&= ~SYMFILE_NO_READ
;
1120 /* Give user a chance to burp if we'd be
1121 interactively wiping out any existing symbols. */
1123 if ((have_full_symbols () || have_partial_symbols ())
1126 && !query (_("Load new symbol table from \"%s\"? "), name
))
1127 error (_("Not confirmed."));
1129 objfile
= allocate_objfile (abfd
, flags
| (mainline
? OBJF_MAINLINE
: 0));
1132 add_separate_debug_objfile (objfile
, parent
);
1134 /* We either created a new mapped symbol table, mapped an existing
1135 symbol table file which has not had initial symbol reading
1136 performed, or need to read an unmapped symbol table. */
1139 if (deprecated_pre_add_symbol_hook
)
1140 deprecated_pre_add_symbol_hook (name
);
1143 printf_unfiltered (_("Reading symbols from %s..."), name
);
1145 gdb_flush (gdb_stdout
);
1148 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1151 /* We now have at least a partial symbol table. Check to see if the
1152 user requested that all symbols be read on initial access via either
1153 the gdb startup command line or on a per symbol file basis. Expand
1154 all partial symbol tables for this objfile if so. */
1156 if ((flags
& OBJF_READNOW
))
1160 printf_unfiltered (_("expanding to full symbols..."));
1162 gdb_flush (gdb_stdout
);
1166 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1169 if (should_print
&& !objfile_has_symbols (objfile
))
1172 printf_unfiltered (_("(no debugging symbols found)..."));
1178 if (deprecated_post_add_symbol_hook
)
1179 deprecated_post_add_symbol_hook ();
1181 printf_unfiltered (_("done.\n"));
1184 /* We print some messages regardless of whether 'from_tty ||
1185 info_verbose' is true, so make sure they go out at the right
1187 gdb_flush (gdb_stdout
);
1189 if (objfile
->sf
== NULL
)
1191 observer_notify_new_objfile (objfile
);
1192 return objfile
; /* No symbols. */
1195 new_symfile_objfile (objfile
, add_flags
);
1197 observer_notify_new_objfile (objfile
);
1199 bfd_cache_close_all ();
1203 /* Add BFD as a separate debug file for OBJFILE. */
1206 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1208 struct objfile
*new_objfile
;
1209 struct section_addr_info
*sap
;
1210 struct cleanup
*my_cleanup
;
1212 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1213 because sections of BFD may not match sections of OBJFILE and because
1214 vma may have been modified by tools such as prelink. */
1215 sap
= build_section_addr_info_from_objfile (objfile
);
1216 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1218 new_objfile
= symbol_file_add_with_addrs_or_offsets
1219 (bfd
, symfile_flags
,
1221 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1225 do_cleanups (my_cleanup
);
1228 /* Process the symbol file ABFD, as either the main file or as a
1229 dynamically loaded file.
1231 See symbol_file_add_with_addrs_or_offsets's comments for
1234 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1235 struct section_addr_info
*addrs
,
1236 int flags
, struct objfile
*parent
)
1238 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1243 /* Process a symbol file, as either the main file or as a dynamically
1244 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1247 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1250 bfd
*bfd
= symfile_bfd_open (name
);
1251 struct cleanup
*cleanup
= make_cleanup_bfd_unref (bfd
);
1252 struct objfile
*objf
;
1254 objf
= symbol_file_add_from_bfd (bfd
, add_flags
, addrs
, flags
, NULL
);
1255 do_cleanups (cleanup
);
1260 /* Call symbol_file_add() with default values and update whatever is
1261 affected by the loading of a new main().
1262 Used when the file is supplied in the gdb command line
1263 and by some targets with special loading requirements.
1264 The auxiliary function, symbol_file_add_main_1(), has the flags
1265 argument for the switches that can only be specified in the symbol_file
1269 symbol_file_add_main (char *args
, int from_tty
)
1271 symbol_file_add_main_1 (args
, from_tty
, 0);
1275 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1277 const int add_flags
= (current_inferior ()->symfile_flags
1278 | SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0));
1280 symbol_file_add (args
, add_flags
, NULL
, flags
);
1282 /* Getting new symbols may change our opinion about
1283 what is frameless. */
1284 reinit_frame_cache ();
1286 if ((flags
& SYMFILE_NO_READ
) == 0)
1287 set_initial_language ();
1291 symbol_file_clear (int from_tty
)
1293 if ((have_full_symbols () || have_partial_symbols ())
1296 ? !query (_("Discard symbol table from `%s'? "),
1297 symfile_objfile
->name
)
1298 : !query (_("Discard symbol table? "))))
1299 error (_("Not confirmed."));
1301 /* solib descriptors may have handles to objfiles. Wipe them before their
1302 objfiles get stale by free_all_objfiles. */
1303 no_shared_libraries (NULL
, from_tty
);
1305 free_all_objfiles ();
1307 gdb_assert (symfile_objfile
== NULL
);
1309 printf_unfiltered (_("No symbol file now.\n"));
1313 separate_debug_file_exists (const char *name
, unsigned long crc
,
1314 struct objfile
*parent_objfile
)
1316 unsigned long file_crc
;
1319 struct stat parent_stat
, abfd_stat
;
1320 int verified_as_different
;
1322 /* Find a separate debug info file as if symbols would be present in
1323 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1324 section can contain just the basename of PARENT_OBJFILE without any
1325 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1326 the separate debug infos with the same basename can exist. */
1328 if (filename_cmp (name
, parent_objfile
->name
) == 0)
1331 abfd
= gdb_bfd_open_maybe_remote (name
);
1336 /* Verify symlinks were not the cause of filename_cmp name difference above.
1338 Some operating systems, e.g. Windows, do not provide a meaningful
1339 st_ino; they always set it to zero. (Windows does provide a
1340 meaningful st_dev.) Do not indicate a duplicate library in that
1341 case. While there is no guarantee that a system that provides
1342 meaningful inode numbers will never set st_ino to zero, this is
1343 merely an optimization, so we do not need to worry about false
1346 if (bfd_stat (abfd
, &abfd_stat
) == 0
1347 && abfd_stat
.st_ino
!= 0
1348 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1350 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1351 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1353 gdb_bfd_unref (abfd
);
1356 verified_as_different
= 1;
1359 verified_as_different
= 0;
1361 file_crc_p
= gdb_bfd_crc (abfd
, &file_crc
);
1363 gdb_bfd_unref (abfd
);
1368 if (crc
!= file_crc
)
1370 unsigned long parent_crc
;
1372 /* If one (or both) the files are accessed for example the via "remote:"
1373 gdbserver way it does not support the bfd_stat operation. Verify
1374 whether those two files are not the same manually. */
1376 if (!verified_as_different
)
1378 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1382 if (verified_as_different
|| parent_crc
!= file_crc
)
1383 warning (_("the debug information found in \"%s\""
1384 " does not match \"%s\" (CRC mismatch).\n"),
1385 name
, parent_objfile
->name
);
1393 char *debug_file_directory
= NULL
;
1395 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1396 struct cmd_list_element
*c
, const char *value
)
1398 fprintf_filtered (file
,
1399 _("The directory where separate debug "
1400 "symbols are searched for is \"%s\".\n"),
1404 #if ! defined (DEBUG_SUBDIRECTORY)
1405 #define DEBUG_SUBDIRECTORY ".debug"
1408 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1409 where the original file resides (may not be the same as
1410 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1411 looking for. Returns the name of the debuginfo, of NULL. */
1414 find_separate_debug_file (const char *dir
,
1415 const char *canon_dir
,
1416 const char *debuglink
,
1417 unsigned long crc32
, struct objfile
*objfile
)
1422 VEC (char_ptr
) *debugdir_vec
;
1423 struct cleanup
*back_to
;
1426 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1428 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1429 i
= strlen (canon_dir
);
1431 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1433 + strlen (DEBUG_SUBDIRECTORY
)
1435 + strlen (debuglink
)
1438 /* First try in the same directory as the original file. */
1439 strcpy (debugfile
, dir
);
1440 strcat (debugfile
, debuglink
);
1442 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1445 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1446 strcpy (debugfile
, dir
);
1447 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1448 strcat (debugfile
, "/");
1449 strcat (debugfile
, debuglink
);
1451 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1454 /* Then try in the global debugfile directories.
1456 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1457 cause "/..." lookups. */
1459 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1460 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1462 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1464 strcpy (debugfile
, debugdir
);
1465 strcat (debugfile
, "/");
1466 strcat (debugfile
, dir
);
1467 strcat (debugfile
, debuglink
);
1469 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1472 /* If the file is in the sysroot, try using its base path in the
1473 global debugfile directory. */
1474 if (canon_dir
!= NULL
1475 && filename_ncmp (canon_dir
, gdb_sysroot
,
1476 strlen (gdb_sysroot
)) == 0
1477 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1479 strcpy (debugfile
, debugdir
);
1480 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1481 strcat (debugfile
, "/");
1482 strcat (debugfile
, debuglink
);
1484 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1489 do_cleanups (back_to
);
1494 /* Modify PATH to contain only "directory/" part of PATH.
1495 If there were no directory separators in PATH, PATH will be empty
1496 string on return. */
1499 terminate_after_last_dir_separator (char *path
)
1503 /* Strip off the final filename part, leaving the directory name,
1504 followed by a slash. The directory can be relative or absolute. */
1505 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1506 if (IS_DIR_SEPARATOR (path
[i
]))
1509 /* If I is -1 then no directory is present there and DIR will be "". */
1513 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1514 Returns pathname, or NULL. */
1517 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1520 char *dir
, *canon_dir
;
1522 unsigned long crc32
;
1523 struct cleanup
*cleanups
;
1525 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1527 if (debuglink
== NULL
)
1529 /* There's no separate debug info, hence there's no way we could
1530 load it => no warning. */
1534 cleanups
= make_cleanup (xfree
, debuglink
);
1535 dir
= xstrdup (objfile
->name
);
1536 make_cleanup (xfree
, dir
);
1537 terminate_after_last_dir_separator (dir
);
1538 canon_dir
= lrealpath (dir
);
1540 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1544 if (debugfile
== NULL
)
1547 /* For PR gdb/9538, try again with realpath (if different from the
1552 if (lstat (objfile
->name
, &st_buf
) == 0 && S_ISLNK(st_buf
.st_mode
))
1556 symlink_dir
= lrealpath (objfile
->name
);
1557 if (symlink_dir
!= NULL
)
1559 make_cleanup (xfree
, symlink_dir
);
1560 terminate_after_last_dir_separator (symlink_dir
);
1561 if (strcmp (dir
, symlink_dir
) != 0)
1563 /* Different directory, so try using it. */
1564 debugfile
= find_separate_debug_file (symlink_dir
,
1572 #endif /* HAVE_LSTAT */
1575 do_cleanups (cleanups
);
1580 /* This is the symbol-file command. Read the file, analyze its
1581 symbols, and add a struct symtab to a symtab list. The syntax of
1582 the command is rather bizarre:
1584 1. The function buildargv implements various quoting conventions
1585 which are undocumented and have little or nothing in common with
1586 the way things are quoted (or not quoted) elsewhere in GDB.
1588 2. Options are used, which are not generally used in GDB (perhaps
1589 "set mapped on", "set readnow on" would be better)
1591 3. The order of options matters, which is contrary to GNU
1592 conventions (because it is confusing and inconvenient). */
1595 symbol_file_command (char *args
, int from_tty
)
1601 symbol_file_clear (from_tty
);
1605 char **argv
= gdb_buildargv (args
);
1606 int flags
= OBJF_USERLOADED
;
1607 struct cleanup
*cleanups
;
1610 cleanups
= make_cleanup_freeargv (argv
);
1611 while (*argv
!= NULL
)
1613 if (strcmp (*argv
, "-readnow") == 0)
1614 flags
|= OBJF_READNOW
;
1615 else if (**argv
== '-')
1616 error (_("unknown option `%s'"), *argv
);
1619 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1627 error (_("no symbol file name was specified"));
1629 do_cleanups (cleanups
);
1633 /* Set the initial language.
1635 FIXME: A better solution would be to record the language in the
1636 psymtab when reading partial symbols, and then use it (if known) to
1637 set the language. This would be a win for formats that encode the
1638 language in an easily discoverable place, such as DWARF. For
1639 stabs, we can jump through hoops looking for specially named
1640 symbols or try to intuit the language from the specific type of
1641 stabs we find, but we can't do that until later when we read in
1645 set_initial_language (void)
1647 enum language lang
= language_unknown
;
1649 if (language_of_main
!= language_unknown
)
1650 lang
= language_of_main
;
1653 const char *filename
;
1655 filename
= find_main_filename ();
1656 if (filename
!= NULL
)
1657 lang
= deduce_language_from_filename (filename
);
1660 if (lang
== language_unknown
)
1662 /* Make C the default language */
1666 set_language (lang
);
1667 expected_language
= current_language
; /* Don't warn the user. */
1670 /* If NAME is a remote name open the file using remote protocol, otherwise
1671 open it normally. Returns a new reference to the BFD. On error,
1672 returns NULL with the BFD error set. */
1675 gdb_bfd_open_maybe_remote (const char *name
)
1679 if (remote_filename_p (name
))
1680 result
= remote_bfd_open (name
, gnutarget
);
1682 result
= gdb_bfd_open (name
, gnutarget
, -1);
1688 /* Open the file specified by NAME and hand it off to BFD for
1689 preliminary analysis. Return a newly initialized bfd *, which
1690 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1691 absolute). In case of trouble, error() is called. */
1694 symfile_bfd_open (char *name
)
1698 char *absolute_name
;
1700 if (remote_filename_p (name
))
1702 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1704 error (_("`%s': can't open to read symbols: %s."), name
,
1705 bfd_errmsg (bfd_get_error ()));
1707 if (!bfd_check_format (sym_bfd
, bfd_object
))
1709 make_cleanup_bfd_unref (sym_bfd
);
1710 error (_("`%s': can't read symbols: %s."), name
,
1711 bfd_errmsg (bfd_get_error ()));
1717 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1719 /* Look down path for it, allocate 2nd new malloc'd copy. */
1720 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1721 O_RDONLY
| O_BINARY
, &absolute_name
);
1722 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1725 char *exename
= alloca (strlen (name
) + 5);
1727 strcat (strcpy (exename
, name
), ".exe");
1728 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1729 O_RDONLY
| O_BINARY
, &absolute_name
);
1734 make_cleanup (xfree
, name
);
1735 perror_with_name (name
);
1739 name
= absolute_name
;
1740 make_cleanup (xfree
, name
);
1742 sym_bfd
= gdb_bfd_open (name
, gnutarget
, desc
);
1745 make_cleanup (xfree
, name
);
1746 error (_("`%s': can't open to read symbols: %s."), name
,
1747 bfd_errmsg (bfd_get_error ()));
1749 bfd_set_cacheable (sym_bfd
, 1);
1751 if (!bfd_check_format (sym_bfd
, bfd_object
))
1753 make_cleanup_bfd_unref (sym_bfd
);
1754 error (_("`%s': can't read symbols: %s."), name
,
1755 bfd_errmsg (bfd_get_error ()));
1761 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1762 the section was not found. */
1765 get_section_index (struct objfile
*objfile
, char *section_name
)
1767 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1775 /* Link SF into the global symtab_fns list. Called on startup by the
1776 _initialize routine in each object file format reader, to register
1777 information about each format the reader is prepared to handle. */
1780 add_symtab_fns (const struct sym_fns
*sf
)
1782 VEC_safe_push (sym_fns_ptr
, symtab_fns
, sf
);
1785 /* Initialize OBJFILE to read symbols from its associated BFD. It
1786 either returns or calls error(). The result is an initialized
1787 struct sym_fns in the objfile structure, that contains cached
1788 information about the symbol file. */
1790 static const struct sym_fns
*
1791 find_sym_fns (bfd
*abfd
)
1793 const struct sym_fns
*sf
;
1794 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1797 if (our_flavour
== bfd_target_srec_flavour
1798 || our_flavour
== bfd_target_ihex_flavour
1799 || our_flavour
== bfd_target_tekhex_flavour
)
1800 return NULL
; /* No symbols. */
1802 for (i
= 0; VEC_iterate (sym_fns_ptr
, symtab_fns
, i
, sf
); ++i
)
1803 if (our_flavour
== sf
->sym_flavour
)
1806 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1807 bfd_get_target (abfd
));
1811 /* This function runs the load command of our current target. */
1814 load_command (char *arg
, int from_tty
)
1818 /* The user might be reloading because the binary has changed. Take
1819 this opportunity to check. */
1820 reopen_exec_file ();
1828 parg
= arg
= get_exec_file (1);
1830 /* Count how many \ " ' tab space there are in the name. */
1831 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1839 /* We need to quote this string so buildargv can pull it apart. */
1840 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1844 make_cleanup (xfree
, temp
);
1847 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1849 strncpy (ptemp
, prev
, parg
- prev
);
1850 ptemp
+= parg
- prev
;
1854 strcpy (ptemp
, prev
);
1860 target_load (arg
, from_tty
);
1862 /* After re-loading the executable, we don't really know which
1863 overlays are mapped any more. */
1864 overlay_cache_invalid
= 1;
1867 /* This version of "load" should be usable for any target. Currently
1868 it is just used for remote targets, not inftarg.c or core files,
1869 on the theory that only in that case is it useful.
1871 Avoiding xmodem and the like seems like a win (a) because we don't have
1872 to worry about finding it, and (b) On VMS, fork() is very slow and so
1873 we don't want to run a subprocess. On the other hand, I'm not sure how
1874 performance compares. */
1876 static int validate_download
= 0;
1878 /* Callback service function for generic_load (bfd_map_over_sections). */
1881 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1883 bfd_size_type
*sum
= data
;
1885 *sum
+= bfd_get_section_size (asec
);
1888 /* Opaque data for load_section_callback. */
1889 struct load_section_data
{
1890 CORE_ADDR load_offset
;
1891 struct load_progress_data
*progress_data
;
1892 VEC(memory_write_request_s
) *requests
;
1895 /* Opaque data for load_progress. */
1896 struct load_progress_data
{
1897 /* Cumulative data. */
1898 unsigned long write_count
;
1899 unsigned long data_count
;
1900 bfd_size_type total_size
;
1903 /* Opaque data for load_progress for a single section. */
1904 struct load_progress_section_data
{
1905 struct load_progress_data
*cumulative
;
1907 /* Per-section data. */
1908 const char *section_name
;
1909 ULONGEST section_sent
;
1910 ULONGEST section_size
;
1915 /* Target write callback routine for progress reporting. */
1918 load_progress (ULONGEST bytes
, void *untyped_arg
)
1920 struct load_progress_section_data
*args
= untyped_arg
;
1921 struct load_progress_data
*totals
;
1924 /* Writing padding data. No easy way to get at the cumulative
1925 stats, so just ignore this. */
1928 totals
= args
->cumulative
;
1930 if (bytes
== 0 && args
->section_sent
== 0)
1932 /* The write is just starting. Let the user know we've started
1934 ui_out_message (current_uiout
, 0, "Loading section %s, size %s lma %s\n",
1935 args
->section_name
, hex_string (args
->section_size
),
1936 paddress (target_gdbarch (), args
->lma
));
1940 if (validate_download
)
1942 /* Broken memories and broken monitors manifest themselves here
1943 when bring new computers to life. This doubles already slow
1945 /* NOTE: cagney/1999-10-18: A more efficient implementation
1946 might add a verify_memory() method to the target vector and
1947 then use that. remote.c could implement that method using
1948 the ``qCRC'' packet. */
1949 gdb_byte
*check
= xmalloc (bytes
);
1950 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1952 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1953 error (_("Download verify read failed at %s"),
1954 paddress (target_gdbarch (), args
->lma
));
1955 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1956 error (_("Download verify compare failed at %s"),
1957 paddress (target_gdbarch (), args
->lma
));
1958 do_cleanups (verify_cleanups
);
1960 totals
->data_count
+= bytes
;
1962 args
->buffer
+= bytes
;
1963 totals
->write_count
+= 1;
1964 args
->section_sent
+= bytes
;
1965 if (check_quit_flag ()
1966 || (deprecated_ui_load_progress_hook
!= NULL
1967 && deprecated_ui_load_progress_hook (args
->section_name
,
1968 args
->section_sent
)))
1969 error (_("Canceled the download"));
1971 if (deprecated_show_load_progress
!= NULL
)
1972 deprecated_show_load_progress (args
->section_name
,
1976 totals
->total_size
);
1979 /* Callback service function for generic_load (bfd_map_over_sections). */
1982 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1984 struct memory_write_request
*new_request
;
1985 struct load_section_data
*args
= data
;
1986 struct load_progress_section_data
*section_data
;
1987 bfd_size_type size
= bfd_get_section_size (asec
);
1989 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1991 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1997 new_request
= VEC_safe_push (memory_write_request_s
,
1998 args
->requests
, NULL
);
1999 memset (new_request
, 0, sizeof (struct memory_write_request
));
2000 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
2001 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
2002 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
2004 new_request
->data
= xmalloc (size
);
2005 new_request
->baton
= section_data
;
2007 buffer
= new_request
->data
;
2009 section_data
->cumulative
= args
->progress_data
;
2010 section_data
->section_name
= sect_name
;
2011 section_data
->section_size
= size
;
2012 section_data
->lma
= new_request
->begin
;
2013 section_data
->buffer
= buffer
;
2015 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2018 /* Clean up an entire memory request vector, including load
2019 data and progress records. */
2022 clear_memory_write_data (void *arg
)
2024 VEC(memory_write_request_s
) **vec_p
= arg
;
2025 VEC(memory_write_request_s
) *vec
= *vec_p
;
2027 struct memory_write_request
*mr
;
2029 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2034 VEC_free (memory_write_request_s
, vec
);
2038 generic_load (char *args
, int from_tty
)
2041 struct timeval start_time
, end_time
;
2043 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2044 struct load_section_data cbdata
;
2045 struct load_progress_data total_progress
;
2046 struct ui_out
*uiout
= current_uiout
;
2051 memset (&cbdata
, 0, sizeof (cbdata
));
2052 memset (&total_progress
, 0, sizeof (total_progress
));
2053 cbdata
.progress_data
= &total_progress
;
2055 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2058 error_no_arg (_("file to load"));
2060 argv
= gdb_buildargv (args
);
2061 make_cleanup_freeargv (argv
);
2063 filename
= tilde_expand (argv
[0]);
2064 make_cleanup (xfree
, filename
);
2066 if (argv
[1] != NULL
)
2070 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2072 /* If the last word was not a valid number then
2073 treat it as a file name with spaces in. */
2074 if (argv
[1] == endptr
)
2075 error (_("Invalid download offset:%s."), argv
[1]);
2077 if (argv
[2] != NULL
)
2078 error (_("Too many parameters."));
2081 /* Open the file for loading. */
2082 loadfile_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2083 if (loadfile_bfd
== NULL
)
2085 perror_with_name (filename
);
2089 make_cleanup_bfd_unref (loadfile_bfd
);
2091 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2093 error (_("\"%s\" is not an object file: %s"), filename
,
2094 bfd_errmsg (bfd_get_error ()));
2097 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2098 (void *) &total_progress
.total_size
);
2100 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2102 gettimeofday (&start_time
, NULL
);
2104 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2105 load_progress
) != 0)
2106 error (_("Load failed"));
2108 gettimeofday (&end_time
, NULL
);
2110 entry
= bfd_get_start_address (loadfile_bfd
);
2111 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2112 ui_out_text (uiout
, "Start address ");
2113 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch (), entry
));
2114 ui_out_text (uiout
, ", load size ");
2115 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2116 ui_out_text (uiout
, "\n");
2117 /* We were doing this in remote-mips.c, I suspect it is right
2118 for other targets too. */
2119 regcache_write_pc (get_current_regcache (), entry
);
2121 /* Reset breakpoints, now that we have changed the load image. For
2122 instance, breakpoints may have been set (or reset, by
2123 post_create_inferior) while connected to the target but before we
2124 loaded the program. In that case, the prologue analyzer could
2125 have read instructions from the target to find the right
2126 breakpoint locations. Loading has changed the contents of that
2129 breakpoint_re_set ();
2131 /* FIXME: are we supposed to call symbol_file_add or not? According
2132 to a comment from remote-mips.c (where a call to symbol_file_add
2133 was commented out), making the call confuses GDB if more than one
2134 file is loaded in. Some targets do (e.g., remote-vx.c) but
2135 others don't (or didn't - perhaps they have all been deleted). */
2137 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2138 total_progress
.write_count
,
2139 &start_time
, &end_time
);
2141 do_cleanups (old_cleanups
);
2144 /* Report how fast the transfer went. */
2147 print_transfer_performance (struct ui_file
*stream
,
2148 unsigned long data_count
,
2149 unsigned long write_count
,
2150 const struct timeval
*start_time
,
2151 const struct timeval
*end_time
)
2153 ULONGEST time_count
;
2154 struct ui_out
*uiout
= current_uiout
;
2156 /* Compute the elapsed time in milliseconds, as a tradeoff between
2157 accuracy and overflow. */
2158 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2159 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2161 ui_out_text (uiout
, "Transfer rate: ");
2164 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2166 if (ui_out_is_mi_like_p (uiout
))
2168 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2169 ui_out_text (uiout
, " bits/sec");
2171 else if (rate
< 1024)
2173 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2174 ui_out_text (uiout
, " bytes/sec");
2178 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2179 ui_out_text (uiout
, " KB/sec");
2184 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2185 ui_out_text (uiout
, " bits in <1 sec");
2187 if (write_count
> 0)
2189 ui_out_text (uiout
, ", ");
2190 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2191 ui_out_text (uiout
, " bytes/write");
2193 ui_out_text (uiout
, ".\n");
2196 /* This function allows the addition of incrementally linked object files.
2197 It does not modify any state in the target, only in the debugger. */
2198 /* Note: ezannoni 2000-04-13 This function/command used to have a
2199 special case syntax for the rombug target (Rombug is the boot
2200 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2201 rombug case, the user doesn't need to supply a text address,
2202 instead a call to target_link() (in target.c) would supply the
2203 value to use. We are now discontinuing this type of ad hoc syntax. */
2206 add_symbol_file_command (char *args
, int from_tty
)
2208 struct gdbarch
*gdbarch
= get_current_arch ();
2209 char *filename
= NULL
;
2210 int flags
= OBJF_USERLOADED
;
2212 int section_index
= 0;
2216 int expecting_sec_name
= 0;
2217 int expecting_sec_addr
= 0;
2226 struct section_addr_info
*section_addrs
;
2227 struct sect_opt
*sect_opts
= NULL
;
2228 size_t num_sect_opts
= 0;
2229 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2232 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2233 * sizeof (struct sect_opt
));
2238 error (_("add-symbol-file takes a file name and an address"));
2240 argv
= gdb_buildargv (args
);
2241 make_cleanup_freeargv (argv
);
2243 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2245 /* Process the argument. */
2248 /* The first argument is the file name. */
2249 filename
= tilde_expand (arg
);
2250 make_cleanup (xfree
, filename
);
2255 /* The second argument is always the text address at which
2256 to load the program. */
2257 sect_opts
[section_index
].name
= ".text";
2258 sect_opts
[section_index
].value
= arg
;
2259 if (++section_index
>= num_sect_opts
)
2262 sect_opts
= ((struct sect_opt
*)
2263 xrealloc (sect_opts
,
2265 * sizeof (struct sect_opt
)));
2270 /* It's an option (starting with '-') or it's an argument
2275 if (strcmp (arg
, "-readnow") == 0)
2276 flags
|= OBJF_READNOW
;
2277 else if (strcmp (arg
, "-s") == 0)
2279 expecting_sec_name
= 1;
2280 expecting_sec_addr
= 1;
2285 if (expecting_sec_name
)
2287 sect_opts
[section_index
].name
= arg
;
2288 expecting_sec_name
= 0;
2291 if (expecting_sec_addr
)
2293 sect_opts
[section_index
].value
= arg
;
2294 expecting_sec_addr
= 0;
2295 if (++section_index
>= num_sect_opts
)
2298 sect_opts
= ((struct sect_opt
*)
2299 xrealloc (sect_opts
,
2301 * sizeof (struct sect_opt
)));
2305 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2306 " [-readnow] [-s <secname> <addr>]*"));
2311 /* This command takes at least two arguments. The first one is a
2312 filename, and the second is the address where this file has been
2313 loaded. Abort now if this address hasn't been provided by the
2315 if (section_index
< 1)
2316 error (_("The address where %s has been loaded is missing"), filename
);
2318 /* Print the prompt for the query below. And save the arguments into
2319 a sect_addr_info structure to be passed around to other
2320 functions. We have to split this up into separate print
2321 statements because hex_string returns a local static
2324 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2325 section_addrs
= alloc_section_addr_info (section_index
);
2326 make_cleanup (xfree
, section_addrs
);
2327 for (i
= 0; i
< section_index
; i
++)
2330 char *val
= sect_opts
[i
].value
;
2331 char *sec
= sect_opts
[i
].name
;
2333 addr
= parse_and_eval_address (val
);
2335 /* Here we store the section offsets in the order they were
2336 entered on the command line. */
2337 section_addrs
->other
[sec_num
].name
= sec
;
2338 section_addrs
->other
[sec_num
].addr
= addr
;
2339 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2340 paddress (gdbarch
, addr
));
2343 /* The object's sections are initialized when a
2344 call is made to build_objfile_section_table (objfile).
2345 This happens in reread_symbols.
2346 At this point, we don't know what file type this is,
2347 so we can't determine what section names are valid. */
2349 section_addrs
->num_sections
= sec_num
;
2351 if (from_tty
&& (!query ("%s", "")))
2352 error (_("Not confirmed."));
2354 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2355 section_addrs
, flags
);
2357 /* Getting new symbols may change our opinion about what is
2359 reinit_frame_cache ();
2360 do_cleanups (my_cleanups
);
2364 typedef struct objfile
*objfilep
;
2366 DEF_VEC_P (objfilep
);
2368 /* Re-read symbols if a symbol-file has changed. */
2370 reread_symbols (void)
2372 struct objfile
*objfile
;
2374 struct stat new_statbuf
;
2376 VEC (objfilep
) *new_objfiles
= NULL
;
2377 struct cleanup
*all_cleanups
;
2379 all_cleanups
= make_cleanup (VEC_cleanup (objfilep
), &new_objfiles
);
2381 /* With the addition of shared libraries, this should be modified,
2382 the load time should be saved in the partial symbol tables, since
2383 different tables may come from different source files. FIXME.
2384 This routine should then walk down each partial symbol table
2385 and see if the symbol table that it originates from has been changed. */
2387 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2389 /* solib-sunos.c creates one objfile with obfd. */
2390 if (objfile
->obfd
== NULL
)
2393 /* Separate debug objfiles are handled in the main objfile. */
2394 if (objfile
->separate_debug_objfile_backlink
)
2397 /* If this object is from an archive (what you usually create with
2398 `ar', often called a `static library' on most systems, though
2399 a `shared library' on AIX is also an archive), then you should
2400 stat on the archive name, not member name. */
2401 if (objfile
->obfd
->my_archive
)
2402 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2404 res
= stat (objfile
->name
, &new_statbuf
);
2407 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2408 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2412 new_modtime
= new_statbuf
.st_mtime
;
2413 if (new_modtime
!= objfile
->mtime
)
2415 struct cleanup
*old_cleanups
;
2416 struct section_offsets
*offsets
;
2418 char *obfd_filename
;
2420 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2423 /* There are various functions like symbol_file_add,
2424 symfile_bfd_open, syms_from_objfile, etc., which might
2425 appear to do what we want. But they have various other
2426 effects which we *don't* want. So we just do stuff
2427 ourselves. We don't worry about mapped files (for one thing,
2428 any mapped file will be out of date). */
2430 /* If we get an error, blow away this objfile (not sure if
2431 that is the correct response for things like shared
2433 old_cleanups
= make_cleanup_free_objfile (objfile
);
2434 /* We need to do this whenever any symbols go away. */
2435 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2437 if (exec_bfd
!= NULL
2438 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2439 bfd_get_filename (exec_bfd
)) == 0)
2441 /* Reload EXEC_BFD without asking anything. */
2443 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2446 /* Keep the calls order approx. the same as in free_objfile. */
2448 /* Free the separate debug objfiles. It will be
2449 automatically recreated by sym_read. */
2450 free_objfile_separate_debug (objfile
);
2452 /* Remove any references to this objfile in the global
2454 preserve_values (objfile
);
2456 /* Nuke all the state that we will re-read. Much of the following
2457 code which sets things to NULL really is necessary to tell
2458 other parts of GDB that there is nothing currently there.
2460 Try to keep the freeing order compatible with free_objfile. */
2462 if (objfile
->sf
!= NULL
)
2464 (*objfile
->sf
->sym_finish
) (objfile
);
2467 clear_objfile_data (objfile
);
2469 /* Clean up any state BFD has sitting around. */
2471 struct bfd
*obfd
= objfile
->obfd
;
2473 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2474 /* Open the new BFD before freeing the old one, so that
2475 the filename remains live. */
2476 objfile
->obfd
= gdb_bfd_open_maybe_remote (obfd_filename
);
2477 if (objfile
->obfd
== NULL
)
2479 /* We have to make a cleanup and error here, rather
2480 than erroring later, because once we unref OBFD,
2481 OBFD_FILENAME will be freed. */
2482 make_cleanup_bfd_unref (obfd
);
2483 error (_("Can't open %s to read symbols."), obfd_filename
);
2485 gdb_bfd_unref (obfd
);
2488 objfile
->name
= bfd_get_filename (objfile
->obfd
);
2489 /* bfd_openr sets cacheable to true, which is what we want. */
2490 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2491 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2492 bfd_errmsg (bfd_get_error ()));
2494 /* Save the offsets, we will nuke them with the rest of the
2496 num_offsets
= objfile
->num_sections
;
2497 offsets
= ((struct section_offsets
*)
2498 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2499 memcpy (offsets
, objfile
->section_offsets
,
2500 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2502 /* FIXME: Do we have to free a whole linked list, or is this
2504 if (objfile
->global_psymbols
.list
)
2505 xfree (objfile
->global_psymbols
.list
);
2506 memset (&objfile
->global_psymbols
, 0,
2507 sizeof (objfile
->global_psymbols
));
2508 if (objfile
->static_psymbols
.list
)
2509 xfree (objfile
->static_psymbols
.list
);
2510 memset (&objfile
->static_psymbols
, 0,
2511 sizeof (objfile
->static_psymbols
));
2513 /* Free the obstacks for non-reusable objfiles. */
2514 psymbol_bcache_free (objfile
->psymbol_cache
);
2515 objfile
->psymbol_cache
= psymbol_bcache_init ();
2516 if (objfile
->demangled_names_hash
!= NULL
)
2518 htab_delete (objfile
->demangled_names_hash
);
2519 objfile
->demangled_names_hash
= NULL
;
2521 obstack_free (&objfile
->objfile_obstack
, 0);
2522 objfile
->sections
= NULL
;
2523 objfile
->symtabs
= NULL
;
2524 objfile
->psymtabs
= NULL
;
2525 objfile
->psymtabs_addrmap
= NULL
;
2526 objfile
->free_psymtabs
= NULL
;
2527 objfile
->template_symbols
= NULL
;
2528 objfile
->msymbols
= NULL
;
2529 objfile
->minimal_symbol_count
= 0;
2530 memset (&objfile
->msymbol_hash
, 0,
2531 sizeof (objfile
->msymbol_hash
));
2532 memset (&objfile
->msymbol_demangled_hash
, 0,
2533 sizeof (objfile
->msymbol_demangled_hash
));
2535 set_objfile_per_bfd (objfile
);
2537 /* obstack_init also initializes the obstack so it is
2538 empty. We could use obstack_specify_allocation but
2539 gdb_obstack.h specifies the alloc/dealloc functions. */
2540 obstack_init (&objfile
->objfile_obstack
);
2541 build_objfile_section_table (objfile
);
2542 terminate_minimal_symbol_table (objfile
);
2544 /* We use the same section offsets as from last time. I'm not
2545 sure whether that is always correct for shared libraries. */
2546 objfile
->section_offsets
= (struct section_offsets
*)
2547 obstack_alloc (&objfile
->objfile_obstack
,
2548 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2549 memcpy (objfile
->section_offsets
, offsets
,
2550 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2551 objfile
->num_sections
= num_offsets
;
2553 /* What the hell is sym_new_init for, anyway? The concept of
2554 distinguishing between the main file and additional files
2555 in this way seems rather dubious. */
2556 if (objfile
== symfile_objfile
)
2558 (*objfile
->sf
->sym_new_init
) (objfile
);
2561 (*objfile
->sf
->sym_init
) (objfile
);
2562 clear_complaints (&symfile_complaints
, 1, 1);
2564 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2565 read_symbols (objfile
, 0);
2567 if (!objfile_has_symbols (objfile
))
2570 printf_unfiltered (_("(no debugging symbols found)\n"));
2574 /* We're done reading the symbol file; finish off complaints. */
2575 clear_complaints (&symfile_complaints
, 0, 1);
2577 /* Getting new symbols may change our opinion about what is
2580 reinit_frame_cache ();
2582 /* Discard cleanups as symbol reading was successful. */
2583 discard_cleanups (old_cleanups
);
2585 /* If the mtime has changed between the time we set new_modtime
2586 and now, we *want* this to be out of date, so don't call stat
2588 objfile
->mtime
= new_modtime
;
2589 init_entry_point_info (objfile
);
2591 VEC_safe_push (objfilep
, new_objfiles
, objfile
);
2599 /* Notify objfiles that we've modified objfile sections. */
2600 objfiles_changed ();
2602 clear_symtab_users (0);
2604 /* clear_objfile_data for each objfile was called before freeing it and
2605 observer_notify_new_objfile (NULL) has been called by
2606 clear_symtab_users above. Notify the new files now. */
2607 for (ix
= 0; VEC_iterate (objfilep
, new_objfiles
, ix
, objfile
); ix
++)
2608 observer_notify_new_objfile (objfile
);
2610 /* At least one objfile has changed, so we can consider that
2611 the executable we're debugging has changed too. */
2612 observer_notify_executable_changed ();
2615 do_cleanups (all_cleanups
);
2627 static filename_language
*filename_language_table
;
2628 static int fl_table_size
, fl_table_next
;
2631 add_filename_language (char *ext
, enum language lang
)
2633 if (fl_table_next
>= fl_table_size
)
2635 fl_table_size
+= 10;
2636 filename_language_table
=
2637 xrealloc (filename_language_table
,
2638 fl_table_size
* sizeof (*filename_language_table
));
2641 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2642 filename_language_table
[fl_table_next
].lang
= lang
;
2646 static char *ext_args
;
2648 show_ext_args (struct ui_file
*file
, int from_tty
,
2649 struct cmd_list_element
*c
, const char *value
)
2651 fprintf_filtered (file
,
2652 _("Mapping between filename extension "
2653 "and source language is \"%s\".\n"),
2658 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2661 char *cp
= ext_args
;
2664 /* First arg is filename extension, starting with '.' */
2666 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2668 /* Find end of first arg. */
2669 while (*cp
&& !isspace (*cp
))
2673 error (_("'%s': two arguments required -- "
2674 "filename extension and language"),
2677 /* Null-terminate first arg. */
2680 /* Find beginning of second arg, which should be a source language. */
2681 cp
= skip_spaces (cp
);
2684 error (_("'%s': two arguments required -- "
2685 "filename extension and language"),
2688 /* Lookup the language from among those we know. */
2689 lang
= language_enum (cp
);
2691 /* Now lookup the filename extension: do we already know it? */
2692 for (i
= 0; i
< fl_table_next
; i
++)
2693 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2696 if (i
>= fl_table_next
)
2698 /* New file extension. */
2699 add_filename_language (ext_args
, lang
);
2703 /* Redefining a previously known filename extension. */
2706 /* query ("Really make files of type %s '%s'?", */
2707 /* ext_args, language_str (lang)); */
2709 xfree (filename_language_table
[i
].ext
);
2710 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2711 filename_language_table
[i
].lang
= lang
;
2716 info_ext_lang_command (char *args
, int from_tty
)
2720 printf_filtered (_("Filename extensions and the languages they represent:"));
2721 printf_filtered ("\n\n");
2722 for (i
= 0; i
< fl_table_next
; i
++)
2723 printf_filtered ("\t%s\t- %s\n",
2724 filename_language_table
[i
].ext
,
2725 language_str (filename_language_table
[i
].lang
));
2729 init_filename_language_table (void)
2731 if (fl_table_size
== 0) /* Protect against repetition. */
2735 filename_language_table
=
2736 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2737 add_filename_language (".c", language_c
);
2738 add_filename_language (".d", language_d
);
2739 add_filename_language (".C", language_cplus
);
2740 add_filename_language (".cc", language_cplus
);
2741 add_filename_language (".cp", language_cplus
);
2742 add_filename_language (".cpp", language_cplus
);
2743 add_filename_language (".cxx", language_cplus
);
2744 add_filename_language (".c++", language_cplus
);
2745 add_filename_language (".java", language_java
);
2746 add_filename_language (".class", language_java
);
2747 add_filename_language (".m", language_objc
);
2748 add_filename_language (".f", language_fortran
);
2749 add_filename_language (".F", language_fortran
);
2750 add_filename_language (".for", language_fortran
);
2751 add_filename_language (".FOR", language_fortran
);
2752 add_filename_language (".ftn", language_fortran
);
2753 add_filename_language (".FTN", language_fortran
);
2754 add_filename_language (".fpp", language_fortran
);
2755 add_filename_language (".FPP", language_fortran
);
2756 add_filename_language (".f90", language_fortran
);
2757 add_filename_language (".F90", language_fortran
);
2758 add_filename_language (".f95", language_fortran
);
2759 add_filename_language (".F95", language_fortran
);
2760 add_filename_language (".f03", language_fortran
);
2761 add_filename_language (".F03", language_fortran
);
2762 add_filename_language (".f08", language_fortran
);
2763 add_filename_language (".F08", language_fortran
);
2764 add_filename_language (".s", language_asm
);
2765 add_filename_language (".sx", language_asm
);
2766 add_filename_language (".S", language_asm
);
2767 add_filename_language (".pas", language_pascal
);
2768 add_filename_language (".p", language_pascal
);
2769 add_filename_language (".pp", language_pascal
);
2770 add_filename_language (".adb", language_ada
);
2771 add_filename_language (".ads", language_ada
);
2772 add_filename_language (".a", language_ada
);
2773 add_filename_language (".ada", language_ada
);
2774 add_filename_language (".dg", language_ada
);
2779 deduce_language_from_filename (const char *filename
)
2784 if (filename
!= NULL
)
2785 if ((cp
= strrchr (filename
, '.')) != NULL
)
2786 for (i
= 0; i
< fl_table_next
; i
++)
2787 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2788 return filename_language_table
[i
].lang
;
2790 return language_unknown
;
2795 Allocate and partly initialize a new symbol table. Return a pointer
2796 to it. error() if no space.
2798 Caller must set these fields:
2807 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2809 struct symtab
*symtab
;
2811 symtab
= (struct symtab
*)
2812 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2813 memset (symtab
, 0, sizeof (*symtab
));
2814 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2815 objfile
->per_bfd
->filename_cache
);
2816 symtab
->fullname
= NULL
;
2817 symtab
->language
= deduce_language_from_filename (filename
);
2818 symtab
->debugformat
= "unknown";
2820 /* Hook it to the objfile it comes from. */
2822 symtab
->objfile
= objfile
;
2823 symtab
->next
= objfile
->symtabs
;
2824 objfile
->symtabs
= symtab
;
2826 if (symtab_create_debug
)
2828 /* Be a bit clever with debugging messages, and don't print objfile
2829 every time, only when it changes. */
2830 static char *last_objfile_name
= NULL
;
2832 if (last_objfile_name
== NULL
2833 || strcmp (last_objfile_name
, objfile
->name
) != 0)
2835 xfree (last_objfile_name
);
2836 last_objfile_name
= xstrdup (objfile
->name
);
2837 fprintf_unfiltered (gdb_stdlog
,
2838 "Creating one or more symtabs for objfile %s ...\n",
2841 fprintf_unfiltered (gdb_stdlog
,
2842 "Created symtab %s for module %s.\n",
2843 host_address_to_string (symtab
), filename
);
2850 /* Reset all data structures in gdb which may contain references to symbol
2851 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2854 clear_symtab_users (int add_flags
)
2856 /* Someday, we should do better than this, by only blowing away
2857 the things that really need to be blown. */
2859 /* Clear the "current" symtab first, because it is no longer valid.
2860 breakpoint_re_set may try to access the current symtab. */
2861 clear_current_source_symtab_and_line ();
2864 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2865 breakpoint_re_set ();
2866 clear_last_displayed_sal ();
2867 clear_pc_function_cache ();
2868 observer_notify_new_objfile (NULL
);
2870 /* Clear globals which might have pointed into a removed objfile.
2871 FIXME: It's not clear which of these are supposed to persist
2872 between expressions and which ought to be reset each time. */
2873 expression_context_block
= NULL
;
2874 innermost_block
= NULL
;
2876 /* Varobj may refer to old symbols, perform a cleanup. */
2877 varobj_invalidate ();
2882 clear_symtab_users_cleanup (void *ignore
)
2884 clear_symtab_users (0);
2888 The following code implements an abstraction for debugging overlay sections.
2890 The target model is as follows:
2891 1) The gnu linker will permit multiple sections to be mapped into the
2892 same VMA, each with its own unique LMA (or load address).
2893 2) It is assumed that some runtime mechanism exists for mapping the
2894 sections, one by one, from the load address into the VMA address.
2895 3) This code provides a mechanism for gdb to keep track of which
2896 sections should be considered to be mapped from the VMA to the LMA.
2897 This information is used for symbol lookup, and memory read/write.
2898 For instance, if a section has been mapped then its contents
2899 should be read from the VMA, otherwise from the LMA.
2901 Two levels of debugger support for overlays are available. One is
2902 "manual", in which the debugger relies on the user to tell it which
2903 overlays are currently mapped. This level of support is
2904 implemented entirely in the core debugger, and the information about
2905 whether a section is mapped is kept in the objfile->obj_section table.
2907 The second level of support is "automatic", and is only available if
2908 the target-specific code provides functionality to read the target's
2909 overlay mapping table, and translate its contents for the debugger
2910 (by updating the mapped state information in the obj_section tables).
2912 The interface is as follows:
2914 overlay map <name> -- tell gdb to consider this section mapped
2915 overlay unmap <name> -- tell gdb to consider this section unmapped
2916 overlay list -- list the sections that GDB thinks are mapped
2917 overlay read-target -- get the target's state of what's mapped
2918 overlay off/manual/auto -- set overlay debugging state
2919 Functional interface:
2920 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2921 section, return that section.
2922 find_pc_overlay(pc): find any overlay section that contains
2923 the pc, either in its VMA or its LMA
2924 section_is_mapped(sect): true if overlay is marked as mapped
2925 section_is_overlay(sect): true if section's VMA != LMA
2926 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2927 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2928 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2929 overlay_mapped_address(...): map an address from section's LMA to VMA
2930 overlay_unmapped_address(...): map an address from section's VMA to LMA
2931 symbol_overlayed_address(...): Return a "current" address for symbol:
2932 either in VMA or LMA depending on whether
2933 the symbol's section is currently mapped. */
2935 /* Overlay debugging state: */
2937 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2938 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2940 /* Function: section_is_overlay (SECTION)
2941 Returns true if SECTION has VMA not equal to LMA, ie.
2942 SECTION is loaded at an address different from where it will "run". */
2945 section_is_overlay (struct obj_section
*section
)
2947 if (overlay_debugging
&& section
)
2949 bfd
*abfd
= section
->objfile
->obfd
;
2950 asection
*bfd_section
= section
->the_bfd_section
;
2952 if (bfd_section_lma (abfd
, bfd_section
) != 0
2953 && bfd_section_lma (abfd
, bfd_section
)
2954 != bfd_section_vma (abfd
, bfd_section
))
2961 /* Function: overlay_invalidate_all (void)
2962 Invalidate the mapped state of all overlay sections (mark it as stale). */
2965 overlay_invalidate_all (void)
2967 struct objfile
*objfile
;
2968 struct obj_section
*sect
;
2970 ALL_OBJSECTIONS (objfile
, sect
)
2971 if (section_is_overlay (sect
))
2972 sect
->ovly_mapped
= -1;
2975 /* Function: section_is_mapped (SECTION)
2976 Returns true if section is an overlay, and is currently mapped.
2978 Access to the ovly_mapped flag is restricted to this function, so
2979 that we can do automatic update. If the global flag
2980 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2981 overlay_invalidate_all. If the mapped state of the particular
2982 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2985 section_is_mapped (struct obj_section
*osect
)
2987 struct gdbarch
*gdbarch
;
2989 if (osect
== 0 || !section_is_overlay (osect
))
2992 switch (overlay_debugging
)
2996 return 0; /* overlay debugging off */
2997 case ovly_auto
: /* overlay debugging automatic */
2998 /* Unles there is a gdbarch_overlay_update function,
2999 there's really nothing useful to do here (can't really go auto). */
3000 gdbarch
= get_objfile_arch (osect
->objfile
);
3001 if (gdbarch_overlay_update_p (gdbarch
))
3003 if (overlay_cache_invalid
)
3005 overlay_invalidate_all ();
3006 overlay_cache_invalid
= 0;
3008 if (osect
->ovly_mapped
== -1)
3009 gdbarch_overlay_update (gdbarch
, osect
);
3011 /* fall thru to manual case */
3012 case ovly_on
: /* overlay debugging manual */
3013 return osect
->ovly_mapped
== 1;
3017 /* Function: pc_in_unmapped_range
3018 If PC falls into the lma range of SECTION, return true, else false. */
3021 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3023 if (section_is_overlay (section
))
3025 bfd
*abfd
= section
->objfile
->obfd
;
3026 asection
*bfd_section
= section
->the_bfd_section
;
3028 /* We assume the LMA is relocated by the same offset as the VMA. */
3029 bfd_vma size
= bfd_get_section_size (bfd_section
);
3030 CORE_ADDR offset
= obj_section_offset (section
);
3032 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3033 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3040 /* Function: pc_in_mapped_range
3041 If PC falls into the vma range of SECTION, return true, else false. */
3044 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3046 if (section_is_overlay (section
))
3048 if (obj_section_addr (section
) <= pc
3049 && pc
< obj_section_endaddr (section
))
3057 /* Return true if the mapped ranges of sections A and B overlap, false
3060 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3062 CORE_ADDR a_start
= obj_section_addr (a
);
3063 CORE_ADDR a_end
= obj_section_endaddr (a
);
3064 CORE_ADDR b_start
= obj_section_addr (b
);
3065 CORE_ADDR b_end
= obj_section_endaddr (b
);
3067 return (a_start
< b_end
&& b_start
< a_end
);
3070 /* Function: overlay_unmapped_address (PC, SECTION)
3071 Returns the address corresponding to PC in the unmapped (load) range.
3072 May be the same as PC. */
3075 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3077 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3079 bfd
*abfd
= section
->objfile
->obfd
;
3080 asection
*bfd_section
= section
->the_bfd_section
;
3082 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3083 - bfd_section_vma (abfd
, bfd_section
);
3089 /* Function: overlay_mapped_address (PC, SECTION)
3090 Returns the address corresponding to PC in the mapped (runtime) range.
3091 May be the same as PC. */
3094 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3096 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3098 bfd
*abfd
= section
->objfile
->obfd
;
3099 asection
*bfd_section
= section
->the_bfd_section
;
3101 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3102 - bfd_section_lma (abfd
, bfd_section
);
3109 /* Function: symbol_overlayed_address
3110 Return one of two addresses (relative to the VMA or to the LMA),
3111 depending on whether the section is mapped or not. */
3114 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3116 if (overlay_debugging
)
3118 /* If the symbol has no section, just return its regular address. */
3121 /* If the symbol's section is not an overlay, just return its
3123 if (!section_is_overlay (section
))
3125 /* If the symbol's section is mapped, just return its address. */
3126 if (section_is_mapped (section
))
3129 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3130 * then return its LOADED address rather than its vma address!!
3132 return overlay_unmapped_address (address
, section
);
3137 /* Function: find_pc_overlay (PC)
3138 Return the best-match overlay section for PC:
3139 If PC matches a mapped overlay section's VMA, return that section.
3140 Else if PC matches an unmapped section's VMA, return that section.
3141 Else if PC matches an unmapped section's LMA, return that section. */
3143 struct obj_section
*
3144 find_pc_overlay (CORE_ADDR pc
)
3146 struct objfile
*objfile
;
3147 struct obj_section
*osect
, *best_match
= NULL
;
3149 if (overlay_debugging
)
3150 ALL_OBJSECTIONS (objfile
, osect
)
3151 if (section_is_overlay (osect
))
3153 if (pc_in_mapped_range (pc
, osect
))
3155 if (section_is_mapped (osect
))
3160 else if (pc_in_unmapped_range (pc
, osect
))
3166 /* Function: find_pc_mapped_section (PC)
3167 If PC falls into the VMA address range of an overlay section that is
3168 currently marked as MAPPED, return that section. Else return NULL. */
3170 struct obj_section
*
3171 find_pc_mapped_section (CORE_ADDR pc
)
3173 struct objfile
*objfile
;
3174 struct obj_section
*osect
;
3176 if (overlay_debugging
)
3177 ALL_OBJSECTIONS (objfile
, osect
)
3178 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3184 /* Function: list_overlays_command
3185 Print a list of mapped sections and their PC ranges. */
3188 list_overlays_command (char *args
, int from_tty
)
3191 struct objfile
*objfile
;
3192 struct obj_section
*osect
;
3194 if (overlay_debugging
)
3195 ALL_OBJSECTIONS (objfile
, osect
)
3196 if (section_is_mapped (osect
))
3198 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3203 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3204 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3205 size
= bfd_get_section_size (osect
->the_bfd_section
);
3206 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3208 printf_filtered ("Section %s, loaded at ", name
);
3209 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3210 puts_filtered (" - ");
3211 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3212 printf_filtered (", mapped at ");
3213 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3214 puts_filtered (" - ");
3215 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3216 puts_filtered ("\n");
3221 printf_filtered (_("No sections are mapped.\n"));
3224 /* Function: map_overlay_command
3225 Mark the named section as mapped (ie. residing at its VMA address). */
3228 map_overlay_command (char *args
, int from_tty
)
3230 struct objfile
*objfile
, *objfile2
;
3231 struct obj_section
*sec
, *sec2
;
3233 if (!overlay_debugging
)
3234 error (_("Overlay debugging not enabled. Use "
3235 "either the 'overlay auto' or\n"
3236 "the 'overlay manual' command."));
3238 if (args
== 0 || *args
== 0)
3239 error (_("Argument required: name of an overlay section"));
3241 /* First, find a section matching the user supplied argument. */
3242 ALL_OBJSECTIONS (objfile
, sec
)
3243 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3245 /* Now, check to see if the section is an overlay. */
3246 if (!section_is_overlay (sec
))
3247 continue; /* not an overlay section */
3249 /* Mark the overlay as "mapped". */
3250 sec
->ovly_mapped
= 1;
3252 /* Next, make a pass and unmap any sections that are
3253 overlapped by this new section: */
3254 ALL_OBJSECTIONS (objfile2
, sec2
)
3255 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3258 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3259 bfd_section_name (objfile
->obfd
,
3260 sec2
->the_bfd_section
));
3261 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3265 error (_("No overlay section called %s"), args
);
3268 /* Function: unmap_overlay_command
3269 Mark the overlay section as unmapped
3270 (ie. resident in its LMA address range, rather than the VMA range). */
3273 unmap_overlay_command (char *args
, int from_tty
)
3275 struct objfile
*objfile
;
3276 struct obj_section
*sec
;
3278 if (!overlay_debugging
)
3279 error (_("Overlay debugging not enabled. "
3280 "Use either the 'overlay auto' or\n"
3281 "the 'overlay manual' command."));
3283 if (args
== 0 || *args
== 0)
3284 error (_("Argument required: name of an overlay section"));
3286 /* First, find a section matching the user supplied argument. */
3287 ALL_OBJSECTIONS (objfile
, sec
)
3288 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3290 if (!sec
->ovly_mapped
)
3291 error (_("Section %s is not mapped"), args
);
3292 sec
->ovly_mapped
= 0;
3295 error (_("No overlay section called %s"), args
);
3298 /* Function: overlay_auto_command
3299 A utility command to turn on overlay debugging.
3300 Possibly this should be done via a set/show command. */
3303 overlay_auto_command (char *args
, int from_tty
)
3305 overlay_debugging
= ovly_auto
;
3306 enable_overlay_breakpoints ();
3308 printf_unfiltered (_("Automatic overlay debugging enabled."));
3311 /* Function: overlay_manual_command
3312 A utility command to turn on overlay debugging.
3313 Possibly this should be done via a set/show command. */
3316 overlay_manual_command (char *args
, int from_tty
)
3318 overlay_debugging
= ovly_on
;
3319 disable_overlay_breakpoints ();
3321 printf_unfiltered (_("Overlay debugging enabled."));
3324 /* Function: overlay_off_command
3325 A utility command to turn on overlay debugging.
3326 Possibly this should be done via a set/show command. */
3329 overlay_off_command (char *args
, int from_tty
)
3331 overlay_debugging
= ovly_off
;
3332 disable_overlay_breakpoints ();
3334 printf_unfiltered (_("Overlay debugging disabled."));
3338 overlay_load_command (char *args
, int from_tty
)
3340 struct gdbarch
*gdbarch
= get_current_arch ();
3342 if (gdbarch_overlay_update_p (gdbarch
))
3343 gdbarch_overlay_update (gdbarch
, NULL
);
3345 error (_("This target does not know how to read its overlay state."));
3348 /* Function: overlay_command
3349 A place-holder for a mis-typed command. */
3351 /* Command list chain containing all defined "overlay" subcommands. */
3352 static struct cmd_list_element
*overlaylist
;
3355 overlay_command (char *args
, int from_tty
)
3358 ("\"overlay\" must be followed by the name of an overlay command.\n");
3359 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3363 /* Target Overlays for the "Simplest" overlay manager:
3365 This is GDB's default target overlay layer. It works with the
3366 minimal overlay manager supplied as an example by Cygnus. The
3367 entry point is via a function pointer "gdbarch_overlay_update",
3368 so targets that use a different runtime overlay manager can
3369 substitute their own overlay_update function and take over the
3372 The overlay_update function pokes around in the target's data structures
3373 to see what overlays are mapped, and updates GDB's overlay mapping with
3376 In this simple implementation, the target data structures are as follows:
3377 unsigned _novlys; /# number of overlay sections #/
3378 unsigned _ovly_table[_novlys][4] = {
3379 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3380 {..., ..., ..., ...},
3382 unsigned _novly_regions; /# number of overlay regions #/
3383 unsigned _ovly_region_table[_novly_regions][3] = {
3384 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3387 These functions will attempt to update GDB's mappedness state in the
3388 symbol section table, based on the target's mappedness state.
3390 To do this, we keep a cached copy of the target's _ovly_table, and
3391 attempt to detect when the cached copy is invalidated. The main
3392 entry point is "simple_overlay_update(SECT), which looks up SECT in
3393 the cached table and re-reads only the entry for that section from
3394 the target (whenever possible). */
3396 /* Cached, dynamically allocated copies of the target data structures: */
3397 static unsigned (*cache_ovly_table
)[4] = 0;
3398 static unsigned cache_novlys
= 0;
3399 static CORE_ADDR cache_ovly_table_base
= 0;
3402 VMA
, SIZE
, LMA
, MAPPED
3405 /* Throw away the cached copy of _ovly_table. */
3407 simple_free_overlay_table (void)
3409 if (cache_ovly_table
)
3410 xfree (cache_ovly_table
);
3412 cache_ovly_table
= NULL
;
3413 cache_ovly_table_base
= 0;
3416 /* Read an array of ints of size SIZE from the target into a local buffer.
3417 Convert to host order. int LEN is number of ints. */
3419 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3420 int len
, int size
, enum bfd_endian byte_order
)
3422 /* FIXME (alloca): Not safe if array is very large. */
3423 gdb_byte
*buf
= alloca (len
* size
);
3426 read_memory (memaddr
, buf
, len
* size
);
3427 for (i
= 0; i
< len
; i
++)
3428 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3431 /* Find and grab a copy of the target _ovly_table
3432 (and _novlys, which is needed for the table's size). */
3434 simple_read_overlay_table (void)
3436 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3437 struct gdbarch
*gdbarch
;
3439 enum bfd_endian byte_order
;
3441 simple_free_overlay_table ();
3442 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3445 error (_("Error reading inferior's overlay table: "
3446 "couldn't find `_novlys' variable\n"
3447 "in inferior. Use `overlay manual' mode."));
3451 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3452 if (! ovly_table_msym
)
3454 error (_("Error reading inferior's overlay table: couldn't find "
3455 "`_ovly_table' array\n"
3456 "in inferior. Use `overlay manual' mode."));
3460 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3461 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3462 byte_order
= gdbarch_byte_order (gdbarch
);
3464 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3467 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3468 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3469 read_target_long_array (cache_ovly_table_base
,
3470 (unsigned int *) cache_ovly_table
,
3471 cache_novlys
* 4, word_size
, byte_order
);
3473 return 1; /* SUCCESS */
3476 /* Function: simple_overlay_update_1
3477 A helper function for simple_overlay_update. Assuming a cached copy
3478 of _ovly_table exists, look through it to find an entry whose vma,
3479 lma and size match those of OSECT. Re-read the entry and make sure
3480 it still matches OSECT (else the table may no longer be valid).
3481 Set OSECT's mapped state to match the entry. Return: 1 for
3482 success, 0 for failure. */
3485 simple_overlay_update_1 (struct obj_section
*osect
)
3488 bfd
*obfd
= osect
->objfile
->obfd
;
3489 asection
*bsect
= osect
->the_bfd_section
;
3490 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3491 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3492 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3494 size
= bfd_get_section_size (osect
->the_bfd_section
);
3495 for (i
= 0; i
< cache_novlys
; i
++)
3496 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3497 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3498 /* && cache_ovly_table[i][SIZE] == size */ )
3500 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3501 (unsigned int *) cache_ovly_table
[i
],
3502 4, word_size
, byte_order
);
3503 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3504 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3505 /* && cache_ovly_table[i][SIZE] == size */ )
3507 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3510 else /* Warning! Warning! Target's ovly table has changed! */
3516 /* Function: simple_overlay_update
3517 If OSECT is NULL, then update all sections' mapped state
3518 (after re-reading the entire target _ovly_table).
3519 If OSECT is non-NULL, then try to find a matching entry in the
3520 cached ovly_table and update only OSECT's mapped state.
3521 If a cached entry can't be found or the cache isn't valid, then
3522 re-read the entire cache, and go ahead and update all sections. */
3525 simple_overlay_update (struct obj_section
*osect
)
3527 struct objfile
*objfile
;
3529 /* Were we given an osect to look up? NULL means do all of them. */
3531 /* Have we got a cached copy of the target's overlay table? */
3532 if (cache_ovly_table
!= NULL
)
3534 /* Does its cached location match what's currently in the
3536 struct minimal_symbol
*minsym
3537 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3540 error (_("Error reading inferior's overlay table: couldn't "
3541 "find `_ovly_table' array\n"
3542 "in inferior. Use `overlay manual' mode."));
3544 if (cache_ovly_table_base
== SYMBOL_VALUE_ADDRESS (minsym
))
3545 /* Then go ahead and try to look up this single section in
3547 if (simple_overlay_update_1 (osect
))
3548 /* Found it! We're done. */
3552 /* Cached table no good: need to read the entire table anew.
3553 Or else we want all the sections, in which case it's actually
3554 more efficient to read the whole table in one block anyway. */
3556 if (! simple_read_overlay_table ())
3559 /* Now may as well update all sections, even if only one was requested. */
3560 ALL_OBJSECTIONS (objfile
, osect
)
3561 if (section_is_overlay (osect
))
3564 bfd
*obfd
= osect
->objfile
->obfd
;
3565 asection
*bsect
= osect
->the_bfd_section
;
3567 size
= bfd_get_section_size (bsect
);
3568 for (i
= 0; i
< cache_novlys
; i
++)
3569 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3570 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3571 /* && cache_ovly_table[i][SIZE] == size */ )
3572 { /* obj_section matches i'th entry in ovly_table. */
3573 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3574 break; /* finished with inner for loop: break out. */
3579 /* Set the output sections and output offsets for section SECTP in
3580 ABFD. The relocation code in BFD will read these offsets, so we
3581 need to be sure they're initialized. We map each section to itself,
3582 with no offset; this means that SECTP->vma will be honored. */
3585 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3587 sectp
->output_section
= sectp
;
3588 sectp
->output_offset
= 0;
3591 /* Default implementation for sym_relocate. */
3595 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3598 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3600 bfd
*abfd
= sectp
->owner
;
3602 /* We're only interested in sections with relocation
3604 if ((sectp
->flags
& SEC_RELOC
) == 0)
3607 /* We will handle section offsets properly elsewhere, so relocate as if
3608 all sections begin at 0. */
3609 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3611 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3614 /* Relocate the contents of a debug section SECTP in ABFD. The
3615 contents are stored in BUF if it is non-NULL, or returned in a
3616 malloc'd buffer otherwise.
3618 For some platforms and debug info formats, shared libraries contain
3619 relocations against the debug sections (particularly for DWARF-2;
3620 one affected platform is PowerPC GNU/Linux, although it depends on
3621 the version of the linker in use). Also, ELF object files naturally
3622 have unresolved relocations for their debug sections. We need to apply
3623 the relocations in order to get the locations of symbols correct.
3624 Another example that may require relocation processing, is the
3625 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3629 symfile_relocate_debug_section (struct objfile
*objfile
,
3630 asection
*sectp
, bfd_byte
*buf
)
3632 gdb_assert (objfile
->sf
->sym_relocate
);
3634 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3637 struct symfile_segment_data
*
3638 get_symfile_segment_data (bfd
*abfd
)
3640 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3645 return sf
->sym_segments (abfd
);
3649 free_symfile_segment_data (struct symfile_segment_data
*data
)
3651 xfree (data
->segment_bases
);
3652 xfree (data
->segment_sizes
);
3653 xfree (data
->segment_info
);
3659 - DATA, containing segment addresses from the object file ABFD, and
3660 the mapping from ABFD's sections onto the segments that own them,
3662 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3663 segment addresses reported by the target,
3664 store the appropriate offsets for each section in OFFSETS.
3666 If there are fewer entries in SEGMENT_BASES than there are segments
3667 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3669 If there are more entries, then ignore the extra. The target may
3670 not be able to distinguish between an empty data segment and a
3671 missing data segment; a missing text segment is less plausible. */
3673 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3674 struct section_offsets
*offsets
,
3675 int num_segment_bases
,
3676 const CORE_ADDR
*segment_bases
)
3681 /* It doesn't make sense to call this function unless you have some
3682 segment base addresses. */
3683 gdb_assert (num_segment_bases
> 0);
3685 /* If we do not have segment mappings for the object file, we
3686 can not relocate it by segments. */
3687 gdb_assert (data
!= NULL
);
3688 gdb_assert (data
->num_segments
> 0);
3690 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3692 int which
= data
->segment_info
[i
];
3694 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3696 /* Don't bother computing offsets for sections that aren't
3697 loaded as part of any segment. */
3701 /* Use the last SEGMENT_BASES entry as the address of any extra
3702 segments mentioned in DATA->segment_info. */
3703 if (which
> num_segment_bases
)
3704 which
= num_segment_bases
;
3706 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3707 - data
->segment_bases
[which
- 1]);
3714 symfile_find_segment_sections (struct objfile
*objfile
)
3716 bfd
*abfd
= objfile
->obfd
;
3719 struct symfile_segment_data
*data
;
3721 data
= get_symfile_segment_data (objfile
->obfd
);
3725 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3727 free_symfile_segment_data (data
);
3731 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3733 int which
= data
->segment_info
[i
];
3737 if (objfile
->sect_index_text
== -1)
3738 objfile
->sect_index_text
= sect
->index
;
3740 if (objfile
->sect_index_rodata
== -1)
3741 objfile
->sect_index_rodata
= sect
->index
;
3743 else if (which
== 2)
3745 if (objfile
->sect_index_data
== -1)
3746 objfile
->sect_index_data
= sect
->index
;
3748 if (objfile
->sect_index_bss
== -1)
3749 objfile
->sect_index_bss
= sect
->index
;
3753 free_symfile_segment_data (data
);
3757 _initialize_symfile (void)
3759 struct cmd_list_element
*c
;
3761 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3762 Load symbol table from executable file FILE.\n\
3763 The `file' command can also load symbol tables, as well as setting the file\n\
3764 to execute."), &cmdlist
);
3765 set_cmd_completer (c
, filename_completer
);
3767 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3768 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3769 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3770 ...]\nADDR is the starting address of the file's text.\n\
3771 The optional arguments are section-name section-address pairs and\n\
3772 should be specified if the data and bss segments are not contiguous\n\
3773 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3775 set_cmd_completer (c
, filename_completer
);
3777 c
= add_cmd ("load", class_files
, load_command
, _("\
3778 Dynamically load FILE into the running program, and record its symbols\n\
3779 for access from GDB.\n\
3780 A load OFFSET may also be given."), &cmdlist
);
3781 set_cmd_completer (c
, filename_completer
);
3783 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3784 _("Commands for debugging overlays."), &overlaylist
,
3785 "overlay ", 0, &cmdlist
);
3787 add_com_alias ("ovly", "overlay", class_alias
, 1);
3788 add_com_alias ("ov", "overlay", class_alias
, 1);
3790 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3791 _("Assert that an overlay section is mapped."), &overlaylist
);
3793 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3794 _("Assert that an overlay section is unmapped."), &overlaylist
);
3796 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3797 _("List mappings of overlay sections."), &overlaylist
);
3799 add_cmd ("manual", class_support
, overlay_manual_command
,
3800 _("Enable overlay debugging."), &overlaylist
);
3801 add_cmd ("off", class_support
, overlay_off_command
,
3802 _("Disable overlay debugging."), &overlaylist
);
3803 add_cmd ("auto", class_support
, overlay_auto_command
,
3804 _("Enable automatic overlay debugging."), &overlaylist
);
3805 add_cmd ("load-target", class_support
, overlay_load_command
,
3806 _("Read the overlay mapping state from the target."), &overlaylist
);
3808 /* Filename extension to source language lookup table: */
3809 init_filename_language_table ();
3810 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3812 Set mapping between filename extension and source language."), _("\
3813 Show mapping between filename extension and source language."), _("\
3814 Usage: set extension-language .foo bar"),
3815 set_ext_lang_command
,
3817 &setlist
, &showlist
);
3819 add_info ("extensions", info_ext_lang_command
,
3820 _("All filename extensions associated with a source language."));
3822 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3823 &debug_file_directory
, _("\
3824 Set the directories where separate debug symbols are searched for."), _("\
3825 Show the directories where separate debug symbols are searched for."), _("\
3826 Separate debug symbols are first searched for in the same\n\
3827 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3828 and lastly at the path of the directory of the binary with\n\
3829 each global debug-file-directory component prepended."),
3831 show_debug_file_directory
,
3832 &setlist
, &showlist
);