1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2012 Free Software Foundation, Inc.
5 Contributed by Cygnus Support, using pieces from other GDB modules.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "arch-utils.h"
35 #include "breakpoint.h"
37 #include "complaints.h"
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
47 #include "readline/readline.h"
48 #include "gdb_assert.h"
52 #include "parser-defs.h"
60 #include <sys/types.h>
62 #include "gdb_string.h"
70 int (*deprecated_ui_load_progress_hook
) (const char *section
,
72 void (*deprecated_show_load_progress
) (const char *section
,
73 unsigned long section_sent
,
74 unsigned long section_size
,
75 unsigned long total_sent
,
76 unsigned long total_size
);
77 void (*deprecated_pre_add_symbol_hook
) (const char *);
78 void (*deprecated_post_add_symbol_hook
) (void);
80 static void clear_symtab_users_cleanup (void *ignore
);
82 /* Global variables owned by this file. */
83 int readnow_symbol_files
; /* Read full symbols immediately. */
85 /* Functions this file defines. */
87 static void load_command (char *, int);
89 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
91 static void add_symbol_file_command (char *, int);
93 bfd
*symfile_bfd_open (char *);
95 int get_section_index (struct objfile
*, char *);
97 static const struct sym_fns
*find_sym_fns (bfd
*);
99 static void decrement_reading_symtab (void *);
101 static void overlay_invalidate_all (void);
103 void list_overlays_command (char *, int);
105 void map_overlay_command (char *, int);
107 void unmap_overlay_command (char *, int);
109 static void overlay_auto_command (char *, int);
111 static void overlay_manual_command (char *, int);
113 static void overlay_off_command (char *, int);
115 static void overlay_load_command (char *, int);
117 static void overlay_command (char *, int);
119 static void simple_free_overlay_table (void);
121 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
124 static int simple_read_overlay_table (void);
126 static int simple_overlay_update_1 (struct obj_section
*);
128 static void add_filename_language (char *ext
, enum language lang
);
130 static void info_ext_lang_command (char *args
, int from_tty
);
132 static void init_filename_language_table (void);
134 static void symfile_find_segment_sections (struct objfile
*objfile
);
136 void _initialize_symfile (void);
138 /* List of all available sym_fns. On gdb startup, each object file reader
139 calls add_symtab_fns() to register information on each format it is
142 typedef const struct sym_fns
*sym_fns_ptr
;
143 DEF_VEC_P (sym_fns_ptr
);
145 static VEC (sym_fns_ptr
) *symtab_fns
= NULL
;
147 /* If non-zero, shared library symbols will be added automatically
148 when the inferior is created, new libraries are loaded, or when
149 attaching to the inferior. This is almost always what users will
150 want to have happen; but for very large programs, the startup time
151 will be excessive, and so if this is a problem, the user can clear
152 this flag and then add the shared library symbols as needed. Note
153 that there is a potential for confusion, since if the shared
154 library symbols are not loaded, commands like "info fun" will *not*
155 report all the functions that are actually present. */
157 int auto_solib_add
= 1;
160 /* Make a null terminated copy of the string at PTR with SIZE characters in
161 the obstack pointed to by OBSTACKP . Returns the address of the copy.
162 Note that the string at PTR does not have to be null terminated, I.e. it
163 may be part of a larger string and we are only saving a substring. */
166 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
168 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
169 /* Open-coded memcpy--saves function call time. These strings are usually
170 short. FIXME: Is this really still true with a compiler that can
173 const char *p1
= ptr
;
175 const char *end
= ptr
+ size
;
184 /* Concatenate NULL terminated variable argument list of `const char *'
185 strings; return the new string. Space is found in the OBSTACKP.
186 Argument list must be terminated by a sentinel expression `(char *)
190 obconcat (struct obstack
*obstackp
, ...)
194 va_start (ap
, obstackp
);
197 const char *s
= va_arg (ap
, const char *);
202 obstack_grow_str (obstackp
, s
);
205 obstack_1grow (obstackp
, 0);
207 return obstack_finish (obstackp
);
210 /* True if we are reading a symbol table. */
212 int currently_reading_symtab
= 0;
215 decrement_reading_symtab (void *dummy
)
217 currently_reading_symtab
--;
220 /* Increment currently_reading_symtab and return a cleanup that can be
221 used to decrement it. */
223 increment_reading_symtab (void)
225 ++currently_reading_symtab
;
226 return make_cleanup (decrement_reading_symtab
, NULL
);
229 /* Remember the lowest-addressed loadable section we've seen.
230 This function is called via bfd_map_over_sections.
232 In case of equal vmas, the section with the largest size becomes the
233 lowest-addressed loadable section.
235 If the vmas and sizes are equal, the last section is considered the
236 lowest-addressed loadable section. */
239 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
241 asection
**lowest
= (asection
**) obj
;
243 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
246 *lowest
= sect
; /* First loadable section */
247 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
248 *lowest
= sect
; /* A lower loadable section */
249 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
250 && (bfd_section_size (abfd
, (*lowest
))
251 <= bfd_section_size (abfd
, sect
)))
255 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
257 struct section_addr_info
*
258 alloc_section_addr_info (size_t num_sections
)
260 struct section_addr_info
*sap
;
263 size
= (sizeof (struct section_addr_info
)
264 + sizeof (struct other_sections
) * (num_sections
- 1));
265 sap
= (struct section_addr_info
*) xmalloc (size
);
266 memset (sap
, 0, size
);
267 sap
->num_sections
= num_sections
;
272 /* Build (allocate and populate) a section_addr_info struct from
273 an existing section table. */
275 extern struct section_addr_info
*
276 build_section_addr_info_from_section_table (const struct target_section
*start
,
277 const struct target_section
*end
)
279 struct section_addr_info
*sap
;
280 const struct target_section
*stp
;
283 sap
= alloc_section_addr_info (end
- start
);
285 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
287 if (bfd_get_section_flags (stp
->bfd
,
288 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
289 && oidx
< end
- start
)
291 sap
->other
[oidx
].addr
= stp
->addr
;
292 sap
->other
[oidx
].name
293 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
294 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
302 /* Create a section_addr_info from section offsets in ABFD. */
304 static struct section_addr_info
*
305 build_section_addr_info_from_bfd (bfd
*abfd
)
307 struct section_addr_info
*sap
;
309 struct bfd_section
*sec
;
311 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
312 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
313 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
315 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
316 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
317 sap
->other
[i
].sectindex
= sec
->index
;
323 /* Create a section_addr_info from section offsets in OBJFILE. */
325 struct section_addr_info
*
326 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
328 struct section_addr_info
*sap
;
331 /* Before reread_symbols gets rewritten it is not safe to call:
332 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
334 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
335 for (i
= 0; i
< sap
->num_sections
&& sap
->other
[i
].name
; i
++)
337 int sectindex
= sap
->other
[i
].sectindex
;
339 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
344 /* Free all memory allocated by build_section_addr_info_from_section_table. */
347 free_section_addr_info (struct section_addr_info
*sap
)
351 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
352 if (sap
->other
[idx
].name
)
353 xfree (sap
->other
[idx
].name
);
358 /* Initialize OBJFILE's sect_index_* members. */
360 init_objfile_sect_indices (struct objfile
*objfile
)
365 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
367 objfile
->sect_index_text
= sect
->index
;
369 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
371 objfile
->sect_index_data
= sect
->index
;
373 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
375 objfile
->sect_index_bss
= sect
->index
;
377 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
379 objfile
->sect_index_rodata
= sect
->index
;
381 /* This is where things get really weird... We MUST have valid
382 indices for the various sect_index_* members or gdb will abort.
383 So if for example, there is no ".text" section, we have to
384 accomodate that. First, check for a file with the standard
385 one or two segments. */
387 symfile_find_segment_sections (objfile
);
389 /* Except when explicitly adding symbol files at some address,
390 section_offsets contains nothing but zeros, so it doesn't matter
391 which slot in section_offsets the individual sect_index_* members
392 index into. So if they are all zero, it is safe to just point
393 all the currently uninitialized indices to the first slot. But
394 beware: if this is the main executable, it may be relocated
395 later, e.g. by the remote qOffsets packet, and then this will
396 be wrong! That's why we try segments first. */
398 for (i
= 0; i
< objfile
->num_sections
; i
++)
400 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
405 if (i
== objfile
->num_sections
)
407 if (objfile
->sect_index_text
== -1)
408 objfile
->sect_index_text
= 0;
409 if (objfile
->sect_index_data
== -1)
410 objfile
->sect_index_data
= 0;
411 if (objfile
->sect_index_bss
== -1)
412 objfile
->sect_index_bss
= 0;
413 if (objfile
->sect_index_rodata
== -1)
414 objfile
->sect_index_rodata
= 0;
418 /* The arguments to place_section. */
420 struct place_section_arg
422 struct section_offsets
*offsets
;
426 /* Find a unique offset to use for loadable section SECT if
427 the user did not provide an offset. */
430 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
432 struct place_section_arg
*arg
= obj
;
433 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
435 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
437 /* We are only interested in allocated sections. */
438 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
441 /* If the user specified an offset, honor it. */
442 if (offsets
[sect
->index
] != 0)
445 /* Otherwise, let's try to find a place for the section. */
446 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
453 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
455 int indx
= cur_sec
->index
;
457 /* We don't need to compare against ourself. */
461 /* We can only conflict with allocated sections. */
462 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
465 /* If the section offset is 0, either the section has not been placed
466 yet, or it was the lowest section placed (in which case LOWEST
467 will be past its end). */
468 if (offsets
[indx
] == 0)
471 /* If this section would overlap us, then we must move up. */
472 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
473 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
475 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
476 start_addr
= (start_addr
+ align
- 1) & -align
;
481 /* Otherwise, we appear to be OK. So far. */
486 offsets
[sect
->index
] = start_addr
;
487 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
490 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
491 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
495 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
497 struct section_addr_info
*addrs
)
501 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
503 /* Now calculate offsets for section that were specified by the caller. */
504 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
506 struct other_sections
*osp
;
508 osp
= &addrs
->other
[i
];
509 if (osp
->sectindex
== -1)
512 /* Record all sections in offsets. */
513 /* The section_offsets in the objfile are here filled in using
515 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
519 /* Transform section name S for a name comparison. prelink can split section
520 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
521 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
522 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
523 (`.sbss') section has invalid (increased) virtual address. */
526 addr_section_name (const char *s
)
528 if (strcmp (s
, ".dynbss") == 0)
530 if (strcmp (s
, ".sdynbss") == 0)
536 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
537 their (name, sectindex) pair. sectindex makes the sort by name stable. */
540 addrs_section_compar (const void *ap
, const void *bp
)
542 const struct other_sections
*a
= *((struct other_sections
**) ap
);
543 const struct other_sections
*b
= *((struct other_sections
**) bp
);
546 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
550 return a
->sectindex
- b
->sectindex
;
553 /* Provide sorted array of pointers to sections of ADDRS. The array is
554 terminated by NULL. Caller is responsible to call xfree for it. */
556 static struct other_sections
**
557 addrs_section_sort (struct section_addr_info
*addrs
)
559 struct other_sections
**array
;
562 /* `+ 1' for the NULL terminator. */
563 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
564 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
565 array
[i
] = &addrs
->other
[i
];
568 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
573 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
574 also SECTINDEXes specific to ABFD there. This function can be used to
575 rebase ADDRS to start referencing different BFD than before. */
578 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
580 asection
*lower_sect
;
581 CORE_ADDR lower_offset
;
583 struct cleanup
*my_cleanup
;
584 struct section_addr_info
*abfd_addrs
;
585 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
586 struct other_sections
**addrs_to_abfd_addrs
;
588 /* Find lowest loadable section to be used as starting point for
589 continguous sections. */
591 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
592 if (lower_sect
== NULL
)
594 warning (_("no loadable sections found in added symbol-file %s"),
595 bfd_get_filename (abfd
));
599 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
601 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
602 in ABFD. Section names are not unique - there can be multiple sections of
603 the same name. Also the sections of the same name do not have to be
604 adjacent to each other. Some sections may be present only in one of the
605 files. Even sections present in both files do not have to be in the same
608 Use stable sort by name for the sections in both files. Then linearly
609 scan both lists matching as most of the entries as possible. */
611 addrs_sorted
= addrs_section_sort (addrs
);
612 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
614 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
615 make_cleanup_free_section_addr_info (abfd_addrs
);
616 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
617 make_cleanup (xfree
, abfd_addrs_sorted
);
619 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
620 ABFD_ADDRS_SORTED. */
622 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
623 * addrs
->num_sections
);
624 make_cleanup (xfree
, addrs_to_abfd_addrs
);
626 while (*addrs_sorted
)
628 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
630 while (*abfd_addrs_sorted
631 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
635 if (*abfd_addrs_sorted
636 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
641 /* Make the found item directly addressable from ADDRS. */
642 index_in_addrs
= *addrs_sorted
- addrs
->other
;
643 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
644 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
646 /* Never use the same ABFD entry twice. */
653 /* Calculate offsets for the loadable sections.
654 FIXME! Sections must be in order of increasing loadable section
655 so that contiguous sections can use the lower-offset!!!
657 Adjust offsets if the segments are not contiguous.
658 If the section is contiguous, its offset should be set to
659 the offset of the highest loadable section lower than it
660 (the loadable section directly below it in memory).
661 this_offset = lower_offset = lower_addr - lower_orig_addr */
663 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
665 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
669 /* This is the index used by BFD. */
670 addrs
->other
[i
].sectindex
= sect
->sectindex
;
672 if (addrs
->other
[i
].addr
!= 0)
674 addrs
->other
[i
].addr
-= sect
->addr
;
675 lower_offset
= addrs
->other
[i
].addr
;
678 addrs
->other
[i
].addr
= lower_offset
;
682 /* addr_section_name transformation is not used for SECT_NAME. */
683 const char *sect_name
= addrs
->other
[i
].name
;
685 /* This section does not exist in ABFD, which is normally
686 unexpected and we want to issue a warning.
688 However, the ELF prelinker does create a few sections which are
689 marked in the main executable as loadable (they are loaded in
690 memory from the DYNAMIC segment) and yet are not present in
691 separate debug info files. This is fine, and should not cause
692 a warning. Shared libraries contain just the section
693 ".gnu.liblist" but it is not marked as loadable there. There is
694 no other way to identify them than by their name as the sections
695 created by prelink have no special flags.
697 For the sections `.bss' and `.sbss' see addr_section_name. */
699 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
700 || strcmp (sect_name
, ".gnu.conflict") == 0
701 || (strcmp (sect_name
, ".bss") == 0
703 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
704 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
705 || (strcmp (sect_name
, ".sbss") == 0
707 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
708 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
709 warning (_("section %s not found in %s"), sect_name
,
710 bfd_get_filename (abfd
));
712 addrs
->other
[i
].addr
= 0;
713 addrs
->other
[i
].sectindex
= -1;
717 do_cleanups (my_cleanup
);
720 /* Parse the user's idea of an offset for dynamic linking, into our idea
721 of how to represent it for fast symbol reading. This is the default
722 version of the sym_fns.sym_offsets function for symbol readers that
723 don't need to do anything special. It allocates a section_offsets table
724 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
727 default_symfile_offsets (struct objfile
*objfile
,
728 struct section_addr_info
*addrs
)
730 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
731 objfile
->section_offsets
= (struct section_offsets
*)
732 obstack_alloc (&objfile
->objfile_obstack
,
733 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
734 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
735 objfile
->num_sections
, addrs
);
737 /* For relocatable files, all loadable sections will start at zero.
738 The zero is meaningless, so try to pick arbitrary addresses such
739 that no loadable sections overlap. This algorithm is quadratic,
740 but the number of sections in a single object file is generally
742 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
744 struct place_section_arg arg
;
745 bfd
*abfd
= objfile
->obfd
;
748 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
749 /* We do not expect this to happen; just skip this step if the
750 relocatable file has a section with an assigned VMA. */
751 if (bfd_section_vma (abfd
, cur_sec
) != 0)
756 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
758 /* Pick non-overlapping offsets for sections the user did not
760 arg
.offsets
= objfile
->section_offsets
;
762 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
764 /* Correctly filling in the section offsets is not quite
765 enough. Relocatable files have two properties that
766 (most) shared objects do not:
768 - Their debug information will contain relocations. Some
769 shared libraries do also, but many do not, so this can not
772 - If there are multiple code sections they will be loaded
773 at different relative addresses in memory than they are
774 in the objfile, since all sections in the file will start
777 Because GDB has very limited ability to map from an
778 address in debug info to the correct code section,
779 it relies on adding SECT_OFF_TEXT to things which might be
780 code. If we clear all the section offsets, and set the
781 section VMAs instead, then symfile_relocate_debug_section
782 will return meaningful debug information pointing at the
785 GDB has too many different data structures for section
786 addresses - a bfd, objfile, and so_list all have section
787 tables, as does exec_ops. Some of these could probably
790 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
791 cur_sec
= cur_sec
->next
)
793 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
796 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
797 exec_set_section_address (bfd_get_filename (abfd
),
799 offsets
[cur_sec
->index
]);
800 offsets
[cur_sec
->index
] = 0;
805 /* Remember the bfd indexes for the .text, .data, .bss and
807 init_objfile_sect_indices (objfile
);
811 /* Divide the file into segments, which are individual relocatable units.
812 This is the default version of the sym_fns.sym_segments function for
813 symbol readers that do not have an explicit representation of segments.
814 It assumes that object files do not have segments, and fully linked
815 files have a single segment. */
817 struct symfile_segment_data
*
818 default_symfile_segments (bfd
*abfd
)
822 struct symfile_segment_data
*data
;
825 /* Relocatable files contain enough information to position each
826 loadable section independently; they should not be relocated
828 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
831 /* Make sure there is at least one loadable section in the file. */
832 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
834 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
842 low
= bfd_get_section_vma (abfd
, sect
);
843 high
= low
+ bfd_get_section_size (sect
);
845 data
= XZALLOC (struct symfile_segment_data
);
846 data
->num_segments
= 1;
847 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
848 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
850 num_sections
= bfd_count_sections (abfd
);
851 data
->segment_info
= XCALLOC (num_sections
, int);
853 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
857 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
860 vma
= bfd_get_section_vma (abfd
, sect
);
863 if (vma
+ bfd_get_section_size (sect
) > high
)
864 high
= vma
+ bfd_get_section_size (sect
);
866 data
->segment_info
[i
] = 1;
869 data
->segment_bases
[0] = low
;
870 data
->segment_sizes
[0] = high
- low
;
875 /* This is a convenience function to call sym_read for OBJFILE and
876 possibly force the partial symbols to be read. */
879 read_symbols (struct objfile
*objfile
, int add_flags
)
881 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
882 if (!objfile_has_partial_symbols (objfile
))
884 bfd
*abfd
= find_separate_debug_file_in_section (objfile
);
885 struct cleanup
*cleanup
= make_cleanup_bfd_unref (abfd
);
888 symbol_file_add_separate (abfd
, add_flags
, objfile
);
890 do_cleanups (cleanup
);
892 if ((add_flags
& SYMFILE_NO_READ
) == 0)
893 require_partial_symbols (objfile
, 0);
896 /* Initialize entry point information for this objfile. */
899 init_entry_point_info (struct objfile
*objfile
)
901 /* Save startup file's range of PC addresses to help blockframe.c
902 decide where the bottom of the stack is. */
904 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
906 /* Executable file -- record its entry point so we'll recognize
907 the startup file because it contains the entry point. */
908 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
909 objfile
->ei
.entry_point_p
= 1;
911 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
912 && bfd_get_start_address (objfile
->obfd
) != 0)
914 /* Some shared libraries may have entry points set and be
915 runnable. There's no clear way to indicate this, so just check
916 for values other than zero. */
917 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
918 objfile
->ei
.entry_point_p
= 1;
922 /* Examination of non-executable.o files. Short-circuit this stuff. */
923 objfile
->ei
.entry_point_p
= 0;
926 if (objfile
->ei
.entry_point_p
)
928 CORE_ADDR entry_point
= objfile
->ei
.entry_point
;
930 /* Make certain that the address points at real code, and not a
931 function descriptor. */
933 = gdbarch_convert_from_func_ptr_addr (objfile
->gdbarch
,
937 /* Remove any ISA markers, so that this matches entries in the
939 objfile
->ei
.entry_point
940 = gdbarch_addr_bits_remove (objfile
->gdbarch
, entry_point
);
944 /* Process a symbol file, as either the main file or as a dynamically
947 This function does not set the OBJFILE's entry-point info.
949 OBJFILE is where the symbols are to be read from.
951 ADDRS is the list of section load addresses. If the user has given
952 an 'add-symbol-file' command, then this is the list of offsets and
953 addresses he or she provided as arguments to the command; or, if
954 we're handling a shared library, these are the actual addresses the
955 sections are loaded at, according to the inferior's dynamic linker
956 (as gleaned by GDB's shared library code). We convert each address
957 into an offset from the section VMA's as it appears in the object
958 file, and then call the file's sym_offsets function to convert this
959 into a format-specific offset table --- a `struct section_offsets'.
960 If ADDRS is non-zero, OFFSETS must be zero.
962 OFFSETS is a table of section offsets already in the right
963 format-specific representation. NUM_OFFSETS is the number of
964 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
965 assume this is the proper table the call to sym_offsets described
966 above would produce. Instead of calling sym_offsets, we just dump
967 it right into objfile->section_offsets. (When we're re-reading
968 symbols from an objfile, we don't have the original load address
969 list any more; all we have is the section offset table.) If
970 OFFSETS is non-zero, ADDRS must be zero.
972 ADD_FLAGS encodes verbosity level, whether this is main symbol or
973 an extra symbol file such as dynamically loaded code, and wether
974 breakpoint reset should be deferred. */
977 syms_from_objfile_1 (struct objfile
*objfile
,
978 struct section_addr_info
*addrs
,
979 struct section_offsets
*offsets
,
983 struct section_addr_info
*local_addr
= NULL
;
984 struct cleanup
*old_chain
;
985 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
987 gdb_assert (! (addrs
&& offsets
));
989 objfile
->sf
= find_sym_fns (objfile
->obfd
);
991 if (objfile
->sf
== NULL
)
993 /* No symbols to load, but we still need to make sure
994 that the section_offsets table is allocated. */
995 int num_sections
= bfd_count_sections (objfile
->obfd
);
996 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
998 objfile
->num_sections
= num_sections
;
999 objfile
->section_offsets
1000 = obstack_alloc (&objfile
->objfile_obstack
, size
);
1001 memset (objfile
->section_offsets
, 0, size
);
1005 /* Make sure that partially constructed symbol tables will be cleaned up
1006 if an error occurs during symbol reading. */
1007 old_chain
= make_cleanup_free_objfile (objfile
);
1009 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
1010 list. We now establish the convention that an addr of zero means
1011 no load address was specified. */
1012 if (! addrs
&& ! offsets
)
1015 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
1016 make_cleanup (xfree
, local_addr
);
1020 /* Now either addrs or offsets is non-zero. */
1024 /* We will modify the main symbol table, make sure that all its users
1025 will be cleaned up if an error occurs during symbol reading. */
1026 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1028 /* Since no error yet, throw away the old symbol table. */
1030 if (symfile_objfile
!= NULL
)
1032 free_objfile (symfile_objfile
);
1033 gdb_assert (symfile_objfile
== NULL
);
1036 /* Currently we keep symbols from the add-symbol-file command.
1037 If the user wants to get rid of them, they should do "symbol-file"
1038 without arguments first. Not sure this is the best behavior
1041 (*objfile
->sf
->sym_new_init
) (objfile
);
1044 /* Convert addr into an offset rather than an absolute address.
1045 We find the lowest address of a loaded segment in the objfile,
1046 and assume that <addr> is where that got loaded.
1048 We no longer warn if the lowest section is not a text segment (as
1049 happens for the PA64 port. */
1050 if (addrs
&& addrs
->other
[0].name
)
1051 addr_info_make_relative (addrs
, objfile
->obfd
);
1053 /* Initialize symbol reading routines for this objfile, allow complaints to
1054 appear for this new file, and record how verbose to be, then do the
1055 initial symbol reading for this file. */
1057 (*objfile
->sf
->sym_init
) (objfile
);
1058 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1061 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1064 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
1066 /* Just copy in the offset table directly as given to us. */
1067 objfile
->num_sections
= num_offsets
;
1068 objfile
->section_offsets
1069 = ((struct section_offsets
*)
1070 obstack_alloc (&objfile
->objfile_obstack
, size
));
1071 memcpy (objfile
->section_offsets
, offsets
, size
);
1073 init_objfile_sect_indices (objfile
);
1076 read_symbols (objfile
, add_flags
);
1078 /* Discard cleanups as symbol reading was successful. */
1080 discard_cleanups (old_chain
);
1084 /* Same as syms_from_objfile_1, but also initializes the objfile
1085 entry-point info. */
1088 syms_from_objfile (struct objfile
*objfile
,
1089 struct section_addr_info
*addrs
,
1090 struct section_offsets
*offsets
,
1094 syms_from_objfile_1 (objfile
, addrs
, offsets
, num_offsets
, add_flags
);
1095 init_entry_point_info (objfile
);
1098 /* Perform required actions after either reading in the initial
1099 symbols for a new objfile, or mapping in the symbols from a reusable
1100 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1103 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1105 /* If this is the main symbol file we have to clean up all users of the
1106 old main symbol file. Otherwise it is sufficient to fixup all the
1107 breakpoints that may have been redefined by this symbol file. */
1108 if (add_flags
& SYMFILE_MAINLINE
)
1110 /* OK, make it the "real" symbol file. */
1111 symfile_objfile
= objfile
;
1113 clear_symtab_users (add_flags
);
1115 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1117 breakpoint_re_set ();
1120 /* We're done reading the symbol file; finish off complaints. */
1121 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1124 /* Process a symbol file, as either the main file or as a dynamically
1127 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1128 A new reference is acquired by this function.
1130 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1131 extra, such as dynamically loaded code, and what to do with breakpoins.
1133 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1134 syms_from_objfile, above.
1135 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1137 PARENT is the original objfile if ABFD is a separate debug info file.
1138 Otherwise PARENT is NULL.
1140 Upon success, returns a pointer to the objfile that was added.
1141 Upon failure, jumps back to command level (never returns). */
1143 static struct objfile
*
1144 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1146 struct section_addr_info
*addrs
,
1147 struct section_offsets
*offsets
,
1149 int flags
, struct objfile
*parent
)
1151 struct objfile
*objfile
;
1152 const char *name
= bfd_get_filename (abfd
);
1153 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1154 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1155 const int should_print
= ((from_tty
|| info_verbose
)
1156 && (readnow_symbol_files
1157 || (add_flags
& SYMFILE_NO_READ
) == 0));
1159 if (readnow_symbol_files
)
1161 flags
|= OBJF_READNOW
;
1162 add_flags
&= ~SYMFILE_NO_READ
;
1165 /* Give user a chance to burp if we'd be
1166 interactively wiping out any existing symbols. */
1168 if ((have_full_symbols () || have_partial_symbols ())
1171 && !query (_("Load new symbol table from \"%s\"? "), name
))
1172 error (_("Not confirmed."));
1174 objfile
= allocate_objfile (abfd
, flags
| (mainline
? OBJF_MAINLINE
: 0));
1177 add_separate_debug_objfile (objfile
, parent
);
1179 /* We either created a new mapped symbol table, mapped an existing
1180 symbol table file which has not had initial symbol reading
1181 performed, or need to read an unmapped symbol table. */
1184 if (deprecated_pre_add_symbol_hook
)
1185 deprecated_pre_add_symbol_hook (name
);
1188 printf_unfiltered (_("Reading symbols from %s..."), name
);
1190 gdb_flush (gdb_stdout
);
1193 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1196 /* We now have at least a partial symbol table. Check to see if the
1197 user requested that all symbols be read on initial access via either
1198 the gdb startup command line or on a per symbol file basis. Expand
1199 all partial symbol tables for this objfile if so. */
1201 if ((flags
& OBJF_READNOW
))
1205 printf_unfiltered (_("expanding to full symbols..."));
1207 gdb_flush (gdb_stdout
);
1211 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1214 if (should_print
&& !objfile_has_symbols (objfile
))
1217 printf_unfiltered (_("(no debugging symbols found)..."));
1223 if (deprecated_post_add_symbol_hook
)
1224 deprecated_post_add_symbol_hook ();
1226 printf_unfiltered (_("done.\n"));
1229 /* We print some messages regardless of whether 'from_tty ||
1230 info_verbose' is true, so make sure they go out at the right
1232 gdb_flush (gdb_stdout
);
1234 if (objfile
->sf
== NULL
)
1236 observer_notify_new_objfile (objfile
);
1237 return objfile
; /* No symbols. */
1240 new_symfile_objfile (objfile
, add_flags
);
1242 observer_notify_new_objfile (objfile
);
1244 bfd_cache_close_all ();
1248 /* Add BFD as a separate debug file for OBJFILE. */
1251 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1253 struct objfile
*new_objfile
;
1254 struct section_addr_info
*sap
;
1255 struct cleanup
*my_cleanup
;
1257 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1258 because sections of BFD may not match sections of OBJFILE and because
1259 vma may have been modified by tools such as prelink. */
1260 sap
= build_section_addr_info_from_objfile (objfile
);
1261 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1263 new_objfile
= symbol_file_add_with_addrs_or_offsets
1264 (bfd
, symfile_flags
,
1266 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1270 do_cleanups (my_cleanup
);
1273 /* Process the symbol file ABFD, as either the main file or as a
1274 dynamically loaded file.
1276 See symbol_file_add_with_addrs_or_offsets's comments for
1279 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1280 struct section_addr_info
*addrs
,
1281 int flags
, struct objfile
*parent
)
1283 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1288 /* Process a symbol file, as either the main file or as a dynamically
1289 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1292 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1295 bfd
*bfd
= symfile_bfd_open (name
);
1296 struct cleanup
*cleanup
= make_cleanup_bfd_unref (bfd
);
1297 struct objfile
*objf
;
1299 objf
= symbol_file_add_from_bfd (bfd
, add_flags
, addrs
, flags
, NULL
);
1300 do_cleanups (cleanup
);
1305 /* Call symbol_file_add() with default values and update whatever is
1306 affected by the loading of a new main().
1307 Used when the file is supplied in the gdb command line
1308 and by some targets with special loading requirements.
1309 The auxiliary function, symbol_file_add_main_1(), has the flags
1310 argument for the switches that can only be specified in the symbol_file
1314 symbol_file_add_main (char *args
, int from_tty
)
1316 symbol_file_add_main_1 (args
, from_tty
, 0);
1320 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1322 const int add_flags
= (current_inferior ()->symfile_flags
1323 | SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0));
1325 symbol_file_add (args
, add_flags
, NULL
, flags
);
1327 /* Getting new symbols may change our opinion about
1328 what is frameless. */
1329 reinit_frame_cache ();
1331 if ((flags
& SYMFILE_NO_READ
) == 0)
1332 set_initial_language ();
1336 symbol_file_clear (int from_tty
)
1338 if ((have_full_symbols () || have_partial_symbols ())
1341 ? !query (_("Discard symbol table from `%s'? "),
1342 symfile_objfile
->name
)
1343 : !query (_("Discard symbol table? "))))
1344 error (_("Not confirmed."));
1346 /* solib descriptors may have handles to objfiles. Wipe them before their
1347 objfiles get stale by free_all_objfiles. */
1348 no_shared_libraries (NULL
, from_tty
);
1350 free_all_objfiles ();
1352 gdb_assert (symfile_objfile
== NULL
);
1354 printf_unfiltered (_("No symbol file now.\n"));
1358 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1361 bfd_size_type debuglink_size
;
1362 unsigned long crc32
;
1366 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1371 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1373 contents
= xmalloc (debuglink_size
);
1374 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1375 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1377 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1378 crc_offset
= strlen (contents
) + 1;
1379 crc_offset
= (crc_offset
+ 3) & ~3;
1381 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1387 /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and
1388 return 1. Otherwise print a warning and return 0. ABFD seek position is
1392 get_file_crc (bfd
*abfd
, unsigned long *file_crc_return
)
1394 unsigned long file_crc
= 0;
1396 if (bfd_seek (abfd
, 0, SEEK_SET
) != 0)
1398 warning (_("Problem reading \"%s\" for CRC: %s"),
1399 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1405 gdb_byte buffer
[8 * 1024];
1406 bfd_size_type count
;
1408 count
= bfd_bread (buffer
, sizeof (buffer
), abfd
);
1409 if (count
== (bfd_size_type
) -1)
1411 warning (_("Problem reading \"%s\" for CRC: %s"),
1412 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1417 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1420 *file_crc_return
= file_crc
;
1425 separate_debug_file_exists (const char *name
, unsigned long crc
,
1426 struct objfile
*parent_objfile
)
1428 unsigned long file_crc
;
1431 struct stat parent_stat
, abfd_stat
;
1432 int verified_as_different
;
1434 /* Find a separate debug info file as if symbols would be present in
1435 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1436 section can contain just the basename of PARENT_OBJFILE without any
1437 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1438 the separate debug infos with the same basename can exist. */
1440 if (filename_cmp (name
, parent_objfile
->name
) == 0)
1443 abfd
= gdb_bfd_open_maybe_remote (name
);
1448 /* Verify symlinks were not the cause of filename_cmp name difference above.
1450 Some operating systems, e.g. Windows, do not provide a meaningful
1451 st_ino; they always set it to zero. (Windows does provide a
1452 meaningful st_dev.) Do not indicate a duplicate library in that
1453 case. While there is no guarantee that a system that provides
1454 meaningful inode numbers will never set st_ino to zero, this is
1455 merely an optimization, so we do not need to worry about false
1458 if (bfd_stat (abfd
, &abfd_stat
) == 0
1459 && abfd_stat
.st_ino
!= 0
1460 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1462 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1463 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1465 gdb_bfd_unref (abfd
);
1468 verified_as_different
= 1;
1471 verified_as_different
= 0;
1473 file_crc_p
= get_file_crc (abfd
, &file_crc
);
1475 gdb_bfd_unref (abfd
);
1480 if (crc
!= file_crc
)
1482 /* If one (or both) the files are accessed for example the via "remote:"
1483 gdbserver way it does not support the bfd_stat operation. Verify
1484 whether those two files are not the same manually. */
1486 if (!verified_as_different
&& !parent_objfile
->crc32_p
)
1488 parent_objfile
->crc32_p
= get_file_crc (parent_objfile
->obfd
,
1489 &parent_objfile
->crc32
);
1490 if (!parent_objfile
->crc32_p
)
1494 if (verified_as_different
|| parent_objfile
->crc32
!= file_crc
)
1495 warning (_("the debug information found in \"%s\""
1496 " does not match \"%s\" (CRC mismatch).\n"),
1497 name
, parent_objfile
->name
);
1505 char *debug_file_directory
= NULL
;
1507 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1508 struct cmd_list_element
*c
, const char *value
)
1510 fprintf_filtered (file
,
1511 _("The directory where separate debug "
1512 "symbols are searched for is \"%s\".\n"),
1516 #if ! defined (DEBUG_SUBDIRECTORY)
1517 #define DEBUG_SUBDIRECTORY ".debug"
1520 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1521 where the original file resides (may not be the same as
1522 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1523 looking for. Returns the name of the debuginfo, of NULL. */
1526 find_separate_debug_file (const char *dir
,
1527 const char *canon_dir
,
1528 const char *debuglink
,
1529 unsigned long crc32
, struct objfile
*objfile
)
1534 VEC (char_ptr
) *debugdir_vec
;
1535 struct cleanup
*back_to
;
1538 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1540 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1541 i
= strlen (canon_dir
);
1543 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1545 + strlen (DEBUG_SUBDIRECTORY
)
1547 + strlen (debuglink
)
1550 /* First try in the same directory as the original file. */
1551 strcpy (debugfile
, dir
);
1552 strcat (debugfile
, debuglink
);
1554 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1557 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1558 strcpy (debugfile
, dir
);
1559 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1560 strcat (debugfile
, "/");
1561 strcat (debugfile
, debuglink
);
1563 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1566 /* Then try in the global debugfile directories.
1568 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1569 cause "/..." lookups. */
1571 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1572 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1574 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1576 strcpy (debugfile
, debugdir
);
1577 strcat (debugfile
, "/");
1578 strcat (debugfile
, dir
);
1579 strcat (debugfile
, debuglink
);
1581 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1584 /* If the file is in the sysroot, try using its base path in the
1585 global debugfile directory. */
1586 if (canon_dir
!= NULL
1587 && filename_ncmp (canon_dir
, gdb_sysroot
,
1588 strlen (gdb_sysroot
)) == 0
1589 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1591 strcpy (debugfile
, debugdir
);
1592 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1593 strcat (debugfile
, "/");
1594 strcat (debugfile
, debuglink
);
1596 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1601 do_cleanups (back_to
);
1606 /* Modify PATH to contain only "directory/" part of PATH.
1607 If there were no directory separators in PATH, PATH will be empty
1608 string on return. */
1611 terminate_after_last_dir_separator (char *path
)
1615 /* Strip off the final filename part, leaving the directory name,
1616 followed by a slash. The directory can be relative or absolute. */
1617 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1618 if (IS_DIR_SEPARATOR (path
[i
]))
1621 /* If I is -1 then no directory is present there and DIR will be "". */
1625 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1626 Returns pathname, or NULL. */
1629 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1632 char *dir
, *canon_dir
;
1634 unsigned long crc32
;
1635 struct cleanup
*cleanups
;
1637 debuglink
= get_debug_link_info (objfile
, &crc32
);
1639 if (debuglink
== NULL
)
1641 /* There's no separate debug info, hence there's no way we could
1642 load it => no warning. */
1646 cleanups
= make_cleanup (xfree
, debuglink
);
1647 dir
= xstrdup (objfile
->name
);
1648 make_cleanup (xfree
, dir
);
1649 terminate_after_last_dir_separator (dir
);
1650 canon_dir
= lrealpath (dir
);
1652 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1656 if (debugfile
== NULL
)
1659 /* For PR gdb/9538, try again with realpath (if different from the
1664 if (lstat (objfile
->name
, &st_buf
) == 0 && S_ISLNK(st_buf
.st_mode
))
1668 symlink_dir
= lrealpath (objfile
->name
);
1669 if (symlink_dir
!= NULL
)
1671 make_cleanup (xfree
, symlink_dir
);
1672 terminate_after_last_dir_separator (symlink_dir
);
1673 if (strcmp (dir
, symlink_dir
) != 0)
1675 /* Different directory, so try using it. */
1676 debugfile
= find_separate_debug_file (symlink_dir
,
1684 #endif /* HAVE_LSTAT */
1687 do_cleanups (cleanups
);
1692 /* This is the symbol-file command. Read the file, analyze its
1693 symbols, and add a struct symtab to a symtab list. The syntax of
1694 the command is rather bizarre:
1696 1. The function buildargv implements various quoting conventions
1697 which are undocumented and have little or nothing in common with
1698 the way things are quoted (or not quoted) elsewhere in GDB.
1700 2. Options are used, which are not generally used in GDB (perhaps
1701 "set mapped on", "set readnow on" would be better)
1703 3. The order of options matters, which is contrary to GNU
1704 conventions (because it is confusing and inconvenient). */
1707 symbol_file_command (char *args
, int from_tty
)
1713 symbol_file_clear (from_tty
);
1717 char **argv
= gdb_buildargv (args
);
1718 int flags
= OBJF_USERLOADED
;
1719 struct cleanup
*cleanups
;
1722 cleanups
= make_cleanup_freeargv (argv
);
1723 while (*argv
!= NULL
)
1725 if (strcmp (*argv
, "-readnow") == 0)
1726 flags
|= OBJF_READNOW
;
1727 else if (**argv
== '-')
1728 error (_("unknown option `%s'"), *argv
);
1731 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1739 error (_("no symbol file name was specified"));
1741 do_cleanups (cleanups
);
1745 /* Set the initial language.
1747 FIXME: A better solution would be to record the language in the
1748 psymtab when reading partial symbols, and then use it (if known) to
1749 set the language. This would be a win for formats that encode the
1750 language in an easily discoverable place, such as DWARF. For
1751 stabs, we can jump through hoops looking for specially named
1752 symbols or try to intuit the language from the specific type of
1753 stabs we find, but we can't do that until later when we read in
1757 set_initial_language (void)
1759 enum language lang
= language_unknown
;
1761 if (language_of_main
!= language_unknown
)
1762 lang
= language_of_main
;
1765 const char *filename
;
1767 filename
= find_main_filename ();
1768 if (filename
!= NULL
)
1769 lang
= deduce_language_from_filename (filename
);
1772 if (lang
== language_unknown
)
1774 /* Make C the default language */
1778 set_language (lang
);
1779 expected_language
= current_language
; /* Don't warn the user. */
1782 /* If NAME is a remote name open the file using remote protocol, otherwise
1783 open it normally. Returns a new reference to the BFD. On error,
1784 returns NULL with the BFD error set. */
1787 gdb_bfd_open_maybe_remote (const char *name
)
1791 if (remote_filename_p (name
))
1792 result
= remote_bfd_open (name
, gnutarget
);
1794 result
= gdb_bfd_open (name
, gnutarget
, -1);
1800 /* Open the file specified by NAME and hand it off to BFD for
1801 preliminary analysis. Return a newly initialized bfd *, which
1802 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1803 absolute). In case of trouble, error() is called. */
1806 symfile_bfd_open (char *name
)
1810 char *absolute_name
;
1812 if (remote_filename_p (name
))
1814 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1816 error (_("`%s': can't open to read symbols: %s."), name
,
1817 bfd_errmsg (bfd_get_error ()));
1819 if (!bfd_check_format (sym_bfd
, bfd_object
))
1821 make_cleanup_bfd_unref (sym_bfd
);
1822 error (_("`%s': can't read symbols: %s."), name
,
1823 bfd_errmsg (bfd_get_error ()));
1829 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1831 /* Look down path for it, allocate 2nd new malloc'd copy. */
1832 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1833 O_RDONLY
| O_BINARY
, &absolute_name
);
1834 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1837 char *exename
= alloca (strlen (name
) + 5);
1839 strcat (strcpy (exename
, name
), ".exe");
1840 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1841 O_RDONLY
| O_BINARY
, &absolute_name
);
1846 make_cleanup (xfree
, name
);
1847 perror_with_name (name
);
1851 name
= absolute_name
;
1852 make_cleanup (xfree
, name
);
1854 sym_bfd
= gdb_bfd_open (name
, gnutarget
, desc
);
1857 make_cleanup (xfree
, name
);
1858 error (_("`%s': can't open to read symbols: %s."), name
,
1859 bfd_errmsg (bfd_get_error ()));
1861 bfd_set_cacheable (sym_bfd
, 1);
1863 if (!bfd_check_format (sym_bfd
, bfd_object
))
1865 make_cleanup_bfd_unref (sym_bfd
);
1866 error (_("`%s': can't read symbols: %s."), name
,
1867 bfd_errmsg (bfd_get_error ()));
1873 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1874 the section was not found. */
1877 get_section_index (struct objfile
*objfile
, char *section_name
)
1879 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1887 /* Link SF into the global symtab_fns list. Called on startup by the
1888 _initialize routine in each object file format reader, to register
1889 information about each format the reader is prepared to handle. */
1892 add_symtab_fns (const struct sym_fns
*sf
)
1894 VEC_safe_push (sym_fns_ptr
, symtab_fns
, sf
);
1897 /* Initialize OBJFILE to read symbols from its associated BFD. It
1898 either returns or calls error(). The result is an initialized
1899 struct sym_fns in the objfile structure, that contains cached
1900 information about the symbol file. */
1902 static const struct sym_fns
*
1903 find_sym_fns (bfd
*abfd
)
1905 const struct sym_fns
*sf
;
1906 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1909 if (our_flavour
== bfd_target_srec_flavour
1910 || our_flavour
== bfd_target_ihex_flavour
1911 || our_flavour
== bfd_target_tekhex_flavour
)
1912 return NULL
; /* No symbols. */
1914 for (i
= 0; VEC_iterate (sym_fns_ptr
, symtab_fns
, i
, sf
); ++i
)
1915 if (our_flavour
== sf
->sym_flavour
)
1918 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1919 bfd_get_target (abfd
));
1923 /* This function runs the load command of our current target. */
1926 load_command (char *arg
, int from_tty
)
1930 /* The user might be reloading because the binary has changed. Take
1931 this opportunity to check. */
1932 reopen_exec_file ();
1940 parg
= arg
= get_exec_file (1);
1942 /* Count how many \ " ' tab space there are in the name. */
1943 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1951 /* We need to quote this string so buildargv can pull it apart. */
1952 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1956 make_cleanup (xfree
, temp
);
1959 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1961 strncpy (ptemp
, prev
, parg
- prev
);
1962 ptemp
+= parg
- prev
;
1966 strcpy (ptemp
, prev
);
1972 target_load (arg
, from_tty
);
1974 /* After re-loading the executable, we don't really know which
1975 overlays are mapped any more. */
1976 overlay_cache_invalid
= 1;
1979 /* This version of "load" should be usable for any target. Currently
1980 it is just used for remote targets, not inftarg.c or core files,
1981 on the theory that only in that case is it useful.
1983 Avoiding xmodem and the like seems like a win (a) because we don't have
1984 to worry about finding it, and (b) On VMS, fork() is very slow and so
1985 we don't want to run a subprocess. On the other hand, I'm not sure how
1986 performance compares. */
1988 static int validate_download
= 0;
1990 /* Callback service function for generic_load (bfd_map_over_sections). */
1993 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1995 bfd_size_type
*sum
= data
;
1997 *sum
+= bfd_get_section_size (asec
);
2000 /* Opaque data for load_section_callback. */
2001 struct load_section_data
{
2002 unsigned long load_offset
;
2003 struct load_progress_data
*progress_data
;
2004 VEC(memory_write_request_s
) *requests
;
2007 /* Opaque data for load_progress. */
2008 struct load_progress_data
{
2009 /* Cumulative data. */
2010 unsigned long write_count
;
2011 unsigned long data_count
;
2012 bfd_size_type total_size
;
2015 /* Opaque data for load_progress for a single section. */
2016 struct load_progress_section_data
{
2017 struct load_progress_data
*cumulative
;
2019 /* Per-section data. */
2020 const char *section_name
;
2021 ULONGEST section_sent
;
2022 ULONGEST section_size
;
2027 /* Target write callback routine for progress reporting. */
2030 load_progress (ULONGEST bytes
, void *untyped_arg
)
2032 struct load_progress_section_data
*args
= untyped_arg
;
2033 struct load_progress_data
*totals
;
2036 /* Writing padding data. No easy way to get at the cumulative
2037 stats, so just ignore this. */
2040 totals
= args
->cumulative
;
2042 if (bytes
== 0 && args
->section_sent
== 0)
2044 /* The write is just starting. Let the user know we've started
2046 ui_out_message (current_uiout
, 0, "Loading section %s, size %s lma %s\n",
2047 args
->section_name
, hex_string (args
->section_size
),
2048 paddress (target_gdbarch (), args
->lma
));
2052 if (validate_download
)
2054 /* Broken memories and broken monitors manifest themselves here
2055 when bring new computers to life. This doubles already slow
2057 /* NOTE: cagney/1999-10-18: A more efficient implementation
2058 might add a verify_memory() method to the target vector and
2059 then use that. remote.c could implement that method using
2060 the ``qCRC'' packet. */
2061 gdb_byte
*check
= xmalloc (bytes
);
2062 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
2064 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
2065 error (_("Download verify read failed at %s"),
2066 paddress (target_gdbarch (), args
->lma
));
2067 if (memcmp (args
->buffer
, check
, bytes
) != 0)
2068 error (_("Download verify compare failed at %s"),
2069 paddress (target_gdbarch (), args
->lma
));
2070 do_cleanups (verify_cleanups
);
2072 totals
->data_count
+= bytes
;
2074 args
->buffer
+= bytes
;
2075 totals
->write_count
+= 1;
2076 args
->section_sent
+= bytes
;
2077 if (check_quit_flag ()
2078 || (deprecated_ui_load_progress_hook
!= NULL
2079 && deprecated_ui_load_progress_hook (args
->section_name
,
2080 args
->section_sent
)))
2081 error (_("Canceled the download"));
2083 if (deprecated_show_load_progress
!= NULL
)
2084 deprecated_show_load_progress (args
->section_name
,
2088 totals
->total_size
);
2091 /* Callback service function for generic_load (bfd_map_over_sections). */
2094 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
2096 struct memory_write_request
*new_request
;
2097 struct load_section_data
*args
= data
;
2098 struct load_progress_section_data
*section_data
;
2099 bfd_size_type size
= bfd_get_section_size (asec
);
2101 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
2103 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
2109 new_request
= VEC_safe_push (memory_write_request_s
,
2110 args
->requests
, NULL
);
2111 memset (new_request
, 0, sizeof (struct memory_write_request
));
2112 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
2113 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
2114 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
2116 new_request
->data
= xmalloc (size
);
2117 new_request
->baton
= section_data
;
2119 buffer
= new_request
->data
;
2121 section_data
->cumulative
= args
->progress_data
;
2122 section_data
->section_name
= sect_name
;
2123 section_data
->section_size
= size
;
2124 section_data
->lma
= new_request
->begin
;
2125 section_data
->buffer
= buffer
;
2127 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2130 /* Clean up an entire memory request vector, including load
2131 data and progress records. */
2134 clear_memory_write_data (void *arg
)
2136 VEC(memory_write_request_s
) **vec_p
= arg
;
2137 VEC(memory_write_request_s
) *vec
= *vec_p
;
2139 struct memory_write_request
*mr
;
2141 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2146 VEC_free (memory_write_request_s
, vec
);
2150 generic_load (char *args
, int from_tty
)
2153 struct timeval start_time
, end_time
;
2155 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2156 struct load_section_data cbdata
;
2157 struct load_progress_data total_progress
;
2158 struct ui_out
*uiout
= current_uiout
;
2163 memset (&cbdata
, 0, sizeof (cbdata
));
2164 memset (&total_progress
, 0, sizeof (total_progress
));
2165 cbdata
.progress_data
= &total_progress
;
2167 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2170 error_no_arg (_("file to load"));
2172 argv
= gdb_buildargv (args
);
2173 make_cleanup_freeargv (argv
);
2175 filename
= tilde_expand (argv
[0]);
2176 make_cleanup (xfree
, filename
);
2178 if (argv
[1] != NULL
)
2182 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
2184 /* If the last word was not a valid number then
2185 treat it as a file name with spaces in. */
2186 if (argv
[1] == endptr
)
2187 error (_("Invalid download offset:%s."), argv
[1]);
2189 if (argv
[2] != NULL
)
2190 error (_("Too many parameters."));
2193 /* Open the file for loading. */
2194 loadfile_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2195 if (loadfile_bfd
== NULL
)
2197 perror_with_name (filename
);
2201 make_cleanup_bfd_unref (loadfile_bfd
);
2203 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2205 error (_("\"%s\" is not an object file: %s"), filename
,
2206 bfd_errmsg (bfd_get_error ()));
2209 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2210 (void *) &total_progress
.total_size
);
2212 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2214 gettimeofday (&start_time
, NULL
);
2216 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2217 load_progress
) != 0)
2218 error (_("Load failed"));
2220 gettimeofday (&end_time
, NULL
);
2222 entry
= bfd_get_start_address (loadfile_bfd
);
2223 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2224 ui_out_text (uiout
, "Start address ");
2225 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch (), entry
));
2226 ui_out_text (uiout
, ", load size ");
2227 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2228 ui_out_text (uiout
, "\n");
2229 /* We were doing this in remote-mips.c, I suspect it is right
2230 for other targets too. */
2231 regcache_write_pc (get_current_regcache (), entry
);
2233 /* Reset breakpoints, now that we have changed the load image. For
2234 instance, breakpoints may have been set (or reset, by
2235 post_create_inferior) while connected to the target but before we
2236 loaded the program. In that case, the prologue analyzer could
2237 have read instructions from the target to find the right
2238 breakpoint locations. Loading has changed the contents of that
2241 breakpoint_re_set ();
2243 /* FIXME: are we supposed to call symbol_file_add or not? According
2244 to a comment from remote-mips.c (where a call to symbol_file_add
2245 was commented out), making the call confuses GDB if more than one
2246 file is loaded in. Some targets do (e.g., remote-vx.c) but
2247 others don't (or didn't - perhaps they have all been deleted). */
2249 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2250 total_progress
.write_count
,
2251 &start_time
, &end_time
);
2253 do_cleanups (old_cleanups
);
2256 /* Report how fast the transfer went. */
2259 print_transfer_performance (struct ui_file
*stream
,
2260 unsigned long data_count
,
2261 unsigned long write_count
,
2262 const struct timeval
*start_time
,
2263 const struct timeval
*end_time
)
2265 ULONGEST time_count
;
2266 struct ui_out
*uiout
= current_uiout
;
2268 /* Compute the elapsed time in milliseconds, as a tradeoff between
2269 accuracy and overflow. */
2270 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2271 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2273 ui_out_text (uiout
, "Transfer rate: ");
2276 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2278 if (ui_out_is_mi_like_p (uiout
))
2280 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2281 ui_out_text (uiout
, " bits/sec");
2283 else if (rate
< 1024)
2285 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2286 ui_out_text (uiout
, " bytes/sec");
2290 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2291 ui_out_text (uiout
, " KB/sec");
2296 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2297 ui_out_text (uiout
, " bits in <1 sec");
2299 if (write_count
> 0)
2301 ui_out_text (uiout
, ", ");
2302 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2303 ui_out_text (uiout
, " bytes/write");
2305 ui_out_text (uiout
, ".\n");
2308 /* This function allows the addition of incrementally linked object files.
2309 It does not modify any state in the target, only in the debugger. */
2310 /* Note: ezannoni 2000-04-13 This function/command used to have a
2311 special case syntax for the rombug target (Rombug is the boot
2312 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2313 rombug case, the user doesn't need to supply a text address,
2314 instead a call to target_link() (in target.c) would supply the
2315 value to use. We are now discontinuing this type of ad hoc syntax. */
2318 add_symbol_file_command (char *args
, int from_tty
)
2320 struct gdbarch
*gdbarch
= get_current_arch ();
2321 char *filename
= NULL
;
2322 int flags
= OBJF_USERLOADED
;
2324 int section_index
= 0;
2328 int expecting_sec_name
= 0;
2329 int expecting_sec_addr
= 0;
2338 struct section_addr_info
*section_addrs
;
2339 struct sect_opt
*sect_opts
= NULL
;
2340 size_t num_sect_opts
= 0;
2341 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2344 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2345 * sizeof (struct sect_opt
));
2350 error (_("add-symbol-file takes a file name and an address"));
2352 argv
= gdb_buildargv (args
);
2353 make_cleanup_freeargv (argv
);
2355 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2357 /* Process the argument. */
2360 /* The first argument is the file name. */
2361 filename
= tilde_expand (arg
);
2362 make_cleanup (xfree
, filename
);
2367 /* The second argument is always the text address at which
2368 to load the program. */
2369 sect_opts
[section_index
].name
= ".text";
2370 sect_opts
[section_index
].value
= arg
;
2371 if (++section_index
>= num_sect_opts
)
2374 sect_opts
= ((struct sect_opt
*)
2375 xrealloc (sect_opts
,
2377 * sizeof (struct sect_opt
)));
2382 /* It's an option (starting with '-') or it's an argument
2387 if (strcmp (arg
, "-readnow") == 0)
2388 flags
|= OBJF_READNOW
;
2389 else if (strcmp (arg
, "-s") == 0)
2391 expecting_sec_name
= 1;
2392 expecting_sec_addr
= 1;
2397 if (expecting_sec_name
)
2399 sect_opts
[section_index
].name
= arg
;
2400 expecting_sec_name
= 0;
2403 if (expecting_sec_addr
)
2405 sect_opts
[section_index
].value
= arg
;
2406 expecting_sec_addr
= 0;
2407 if (++section_index
>= num_sect_opts
)
2410 sect_opts
= ((struct sect_opt
*)
2411 xrealloc (sect_opts
,
2413 * sizeof (struct sect_opt
)));
2417 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2418 " [-readnow] [-s <secname> <addr>]*"));
2423 /* This command takes at least two arguments. The first one is a
2424 filename, and the second is the address where this file has been
2425 loaded. Abort now if this address hasn't been provided by the
2427 if (section_index
< 1)
2428 error (_("The address where %s has been loaded is missing"), filename
);
2430 /* Print the prompt for the query below. And save the arguments into
2431 a sect_addr_info structure to be passed around to other
2432 functions. We have to split this up into separate print
2433 statements because hex_string returns a local static
2436 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2437 section_addrs
= alloc_section_addr_info (section_index
);
2438 make_cleanup (xfree
, section_addrs
);
2439 for (i
= 0; i
< section_index
; i
++)
2442 char *val
= sect_opts
[i
].value
;
2443 char *sec
= sect_opts
[i
].name
;
2445 addr
= parse_and_eval_address (val
);
2447 /* Here we store the section offsets in the order they were
2448 entered on the command line. */
2449 section_addrs
->other
[sec_num
].name
= sec
;
2450 section_addrs
->other
[sec_num
].addr
= addr
;
2451 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2452 paddress (gdbarch
, addr
));
2455 /* The object's sections are initialized when a
2456 call is made to build_objfile_section_table (objfile).
2457 This happens in reread_symbols.
2458 At this point, we don't know what file type this is,
2459 so we can't determine what section names are valid. */
2462 if (from_tty
&& (!query ("%s", "")))
2463 error (_("Not confirmed."));
2465 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2466 section_addrs
, flags
);
2468 /* Getting new symbols may change our opinion about what is
2470 reinit_frame_cache ();
2471 do_cleanups (my_cleanups
);
2475 typedef struct objfile
*objfilep
;
2477 DEF_VEC_P (objfilep
);
2479 /* Re-read symbols if a symbol-file has changed. */
2481 reread_symbols (void)
2483 struct objfile
*objfile
;
2485 struct stat new_statbuf
;
2487 VEC (objfilep
) *new_objfiles
= NULL
;
2488 struct cleanup
*all_cleanups
;
2490 all_cleanups
= make_cleanup (VEC_cleanup (objfilep
), &new_objfiles
);
2492 /* With the addition of shared libraries, this should be modified,
2493 the load time should be saved in the partial symbol tables, since
2494 different tables may come from different source files. FIXME.
2495 This routine should then walk down each partial symbol table
2496 and see if the symbol table that it originates from has been changed. */
2498 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2500 /* solib-sunos.c creates one objfile with obfd. */
2501 if (objfile
->obfd
== NULL
)
2504 /* Separate debug objfiles are handled in the main objfile. */
2505 if (objfile
->separate_debug_objfile_backlink
)
2508 /* If this object is from an archive (what you usually create with
2509 `ar', often called a `static library' on most systems, though
2510 a `shared library' on AIX is also an archive), then you should
2511 stat on the archive name, not member name. */
2512 if (objfile
->obfd
->my_archive
)
2513 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2515 res
= stat (objfile
->name
, &new_statbuf
);
2518 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2519 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2523 new_modtime
= new_statbuf
.st_mtime
;
2524 if (new_modtime
!= objfile
->mtime
)
2526 struct cleanup
*old_cleanups
;
2527 struct section_offsets
*offsets
;
2529 char *obfd_filename
;
2531 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2534 /* There are various functions like symbol_file_add,
2535 symfile_bfd_open, syms_from_objfile, etc., which might
2536 appear to do what we want. But they have various other
2537 effects which we *don't* want. So we just do stuff
2538 ourselves. We don't worry about mapped files (for one thing,
2539 any mapped file will be out of date). */
2541 /* If we get an error, blow away this objfile (not sure if
2542 that is the correct response for things like shared
2544 old_cleanups
= make_cleanup_free_objfile (objfile
);
2545 /* We need to do this whenever any symbols go away. */
2546 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2548 if (exec_bfd
!= NULL
2549 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2550 bfd_get_filename (exec_bfd
)) == 0)
2552 /* Reload EXEC_BFD without asking anything. */
2554 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2557 /* Keep the calls order approx. the same as in free_objfile. */
2559 /* Free the separate debug objfiles. It will be
2560 automatically recreated by sym_read. */
2561 free_objfile_separate_debug (objfile
);
2563 /* Remove any references to this objfile in the global
2565 preserve_values (objfile
);
2567 /* Nuke all the state that we will re-read. Much of the following
2568 code which sets things to NULL really is necessary to tell
2569 other parts of GDB that there is nothing currently there.
2571 Try to keep the freeing order compatible with free_objfile. */
2573 if (objfile
->sf
!= NULL
)
2575 (*objfile
->sf
->sym_finish
) (objfile
);
2578 clear_objfile_data (objfile
);
2580 /* Clean up any state BFD has sitting around. */
2582 struct bfd
*obfd
= objfile
->obfd
;
2584 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2585 /* Open the new BFD before freeing the old one, so that
2586 the filename remains live. */
2587 objfile
->obfd
= gdb_bfd_open_maybe_remote (obfd_filename
);
2588 if (objfile
->obfd
== NULL
)
2590 /* We have to make a cleanup and error here, rather
2591 than erroring later, because once we unref OBFD,
2592 OBFD_FILENAME will be freed. */
2593 make_cleanup_bfd_unref (obfd
);
2594 error (_("Can't open %s to read symbols."), obfd_filename
);
2596 gdb_bfd_unref (obfd
);
2599 objfile
->name
= bfd_get_filename (objfile
->obfd
);
2600 /* bfd_openr sets cacheable to true, which is what we want. */
2601 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2602 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2603 bfd_errmsg (bfd_get_error ()));
2605 /* Save the offsets, we will nuke them with the rest of the
2607 num_offsets
= objfile
->num_sections
;
2608 offsets
= ((struct section_offsets
*)
2609 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2610 memcpy (offsets
, objfile
->section_offsets
,
2611 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2613 /* FIXME: Do we have to free a whole linked list, or is this
2615 if (objfile
->global_psymbols
.list
)
2616 xfree (objfile
->global_psymbols
.list
);
2617 memset (&objfile
->global_psymbols
, 0,
2618 sizeof (objfile
->global_psymbols
));
2619 if (objfile
->static_psymbols
.list
)
2620 xfree (objfile
->static_psymbols
.list
);
2621 memset (&objfile
->static_psymbols
, 0,
2622 sizeof (objfile
->static_psymbols
));
2624 /* Free the obstacks for non-reusable objfiles. */
2625 psymbol_bcache_free (objfile
->psymbol_cache
);
2626 objfile
->psymbol_cache
= psymbol_bcache_init ();
2627 if (objfile
->demangled_names_hash
!= NULL
)
2629 htab_delete (objfile
->demangled_names_hash
);
2630 objfile
->demangled_names_hash
= NULL
;
2632 obstack_free (&objfile
->objfile_obstack
, 0);
2633 objfile
->sections
= NULL
;
2634 objfile
->symtabs
= NULL
;
2635 objfile
->psymtabs
= NULL
;
2636 objfile
->psymtabs_addrmap
= NULL
;
2637 objfile
->free_psymtabs
= NULL
;
2638 objfile
->template_symbols
= NULL
;
2639 objfile
->msymbols
= NULL
;
2640 objfile
->minimal_symbol_count
= 0;
2641 memset (&objfile
->msymbol_hash
, 0,
2642 sizeof (objfile
->msymbol_hash
));
2643 memset (&objfile
->msymbol_demangled_hash
, 0,
2644 sizeof (objfile
->msymbol_demangled_hash
));
2646 set_objfile_per_bfd (objfile
);
2648 /* obstack_init also initializes the obstack so it is
2649 empty. We could use obstack_specify_allocation but
2650 gdb_obstack.h specifies the alloc/dealloc functions. */
2651 obstack_init (&objfile
->objfile_obstack
);
2652 build_objfile_section_table (objfile
);
2653 terminate_minimal_symbol_table (objfile
);
2655 /* We use the same section offsets as from last time. I'm not
2656 sure whether that is always correct for shared libraries. */
2657 objfile
->section_offsets
= (struct section_offsets
*)
2658 obstack_alloc (&objfile
->objfile_obstack
,
2659 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2660 memcpy (objfile
->section_offsets
, offsets
,
2661 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2662 objfile
->num_sections
= num_offsets
;
2664 /* What the hell is sym_new_init for, anyway? The concept of
2665 distinguishing between the main file and additional files
2666 in this way seems rather dubious. */
2667 if (objfile
== symfile_objfile
)
2669 (*objfile
->sf
->sym_new_init
) (objfile
);
2672 (*objfile
->sf
->sym_init
) (objfile
);
2673 clear_complaints (&symfile_complaints
, 1, 1);
2675 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2676 read_symbols (objfile
, 0);
2678 if (!objfile_has_symbols (objfile
))
2681 printf_unfiltered (_("(no debugging symbols found)\n"));
2685 /* We're done reading the symbol file; finish off complaints. */
2686 clear_complaints (&symfile_complaints
, 0, 1);
2688 /* Getting new symbols may change our opinion about what is
2691 reinit_frame_cache ();
2693 /* Discard cleanups as symbol reading was successful. */
2694 discard_cleanups (old_cleanups
);
2696 /* If the mtime has changed between the time we set new_modtime
2697 and now, we *want* this to be out of date, so don't call stat
2699 objfile
->mtime
= new_modtime
;
2700 init_entry_point_info (objfile
);
2702 VEC_safe_push (objfilep
, new_objfiles
, objfile
);
2710 /* Notify objfiles that we've modified objfile sections. */
2711 objfiles_changed ();
2713 clear_symtab_users (0);
2715 /* clear_objfile_data for each objfile was called before freeing it and
2716 observer_notify_new_objfile (NULL) has been called by
2717 clear_symtab_users above. Notify the new files now. */
2718 for (ix
= 0; VEC_iterate (objfilep
, new_objfiles
, ix
, objfile
); ix
++)
2719 observer_notify_new_objfile (objfile
);
2721 /* At least one objfile has changed, so we can consider that
2722 the executable we're debugging has changed too. */
2723 observer_notify_executable_changed ();
2726 do_cleanups (all_cleanups
);
2738 static filename_language
*filename_language_table
;
2739 static int fl_table_size
, fl_table_next
;
2742 add_filename_language (char *ext
, enum language lang
)
2744 if (fl_table_next
>= fl_table_size
)
2746 fl_table_size
+= 10;
2747 filename_language_table
=
2748 xrealloc (filename_language_table
,
2749 fl_table_size
* sizeof (*filename_language_table
));
2752 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2753 filename_language_table
[fl_table_next
].lang
= lang
;
2757 static char *ext_args
;
2759 show_ext_args (struct ui_file
*file
, int from_tty
,
2760 struct cmd_list_element
*c
, const char *value
)
2762 fprintf_filtered (file
,
2763 _("Mapping between filename extension "
2764 "and source language is \"%s\".\n"),
2769 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2772 char *cp
= ext_args
;
2775 /* First arg is filename extension, starting with '.' */
2777 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2779 /* Find end of first arg. */
2780 while (*cp
&& !isspace (*cp
))
2784 error (_("'%s': two arguments required -- "
2785 "filename extension and language"),
2788 /* Null-terminate first arg. */
2791 /* Find beginning of second arg, which should be a source language. */
2792 while (*cp
&& isspace (*cp
))
2796 error (_("'%s': two arguments required -- "
2797 "filename extension and language"),
2800 /* Lookup the language from among those we know. */
2801 lang
= language_enum (cp
);
2803 /* Now lookup the filename extension: do we already know it? */
2804 for (i
= 0; i
< fl_table_next
; i
++)
2805 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2808 if (i
>= fl_table_next
)
2810 /* New file extension. */
2811 add_filename_language (ext_args
, lang
);
2815 /* Redefining a previously known filename extension. */
2818 /* query ("Really make files of type %s '%s'?", */
2819 /* ext_args, language_str (lang)); */
2821 xfree (filename_language_table
[i
].ext
);
2822 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2823 filename_language_table
[i
].lang
= lang
;
2828 info_ext_lang_command (char *args
, int from_tty
)
2832 printf_filtered (_("Filename extensions and the languages they represent:"));
2833 printf_filtered ("\n\n");
2834 for (i
= 0; i
< fl_table_next
; i
++)
2835 printf_filtered ("\t%s\t- %s\n",
2836 filename_language_table
[i
].ext
,
2837 language_str (filename_language_table
[i
].lang
));
2841 init_filename_language_table (void)
2843 if (fl_table_size
== 0) /* Protect against repetition. */
2847 filename_language_table
=
2848 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2849 add_filename_language (".c", language_c
);
2850 add_filename_language (".d", language_d
);
2851 add_filename_language (".C", language_cplus
);
2852 add_filename_language (".cc", language_cplus
);
2853 add_filename_language (".cp", language_cplus
);
2854 add_filename_language (".cpp", language_cplus
);
2855 add_filename_language (".cxx", language_cplus
);
2856 add_filename_language (".c++", language_cplus
);
2857 add_filename_language (".java", language_java
);
2858 add_filename_language (".class", language_java
);
2859 add_filename_language (".m", language_objc
);
2860 add_filename_language (".f", language_fortran
);
2861 add_filename_language (".F", language_fortran
);
2862 add_filename_language (".for", language_fortran
);
2863 add_filename_language (".FOR", language_fortran
);
2864 add_filename_language (".ftn", language_fortran
);
2865 add_filename_language (".FTN", language_fortran
);
2866 add_filename_language (".fpp", language_fortran
);
2867 add_filename_language (".FPP", language_fortran
);
2868 add_filename_language (".f90", language_fortran
);
2869 add_filename_language (".F90", language_fortran
);
2870 add_filename_language (".f95", language_fortran
);
2871 add_filename_language (".F95", language_fortran
);
2872 add_filename_language (".f03", language_fortran
);
2873 add_filename_language (".F03", language_fortran
);
2874 add_filename_language (".f08", language_fortran
);
2875 add_filename_language (".F08", language_fortran
);
2876 add_filename_language (".s", language_asm
);
2877 add_filename_language (".sx", language_asm
);
2878 add_filename_language (".S", language_asm
);
2879 add_filename_language (".pas", language_pascal
);
2880 add_filename_language (".p", language_pascal
);
2881 add_filename_language (".pp", language_pascal
);
2882 add_filename_language (".adb", language_ada
);
2883 add_filename_language (".ads", language_ada
);
2884 add_filename_language (".a", language_ada
);
2885 add_filename_language (".ada", language_ada
);
2886 add_filename_language (".dg", language_ada
);
2891 deduce_language_from_filename (const char *filename
)
2896 if (filename
!= NULL
)
2897 if ((cp
= strrchr (filename
, '.')) != NULL
)
2898 for (i
= 0; i
< fl_table_next
; i
++)
2899 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2900 return filename_language_table
[i
].lang
;
2902 return language_unknown
;
2907 Allocate and partly initialize a new symbol table. Return a pointer
2908 to it. error() if no space.
2910 Caller must set these fields:
2919 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2921 struct symtab
*symtab
;
2923 symtab
= (struct symtab
*)
2924 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2925 memset (symtab
, 0, sizeof (*symtab
));
2926 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2927 objfile
->per_bfd
->filename_cache
);
2928 symtab
->fullname
= NULL
;
2929 symtab
->language
= deduce_language_from_filename (filename
);
2930 symtab
->debugformat
= "unknown";
2932 /* Hook it to the objfile it comes from. */
2934 symtab
->objfile
= objfile
;
2935 symtab
->next
= objfile
->symtabs
;
2936 objfile
->symtabs
= symtab
;
2938 if (symtab_create_debug
)
2940 /* Be a bit clever with debugging messages, and don't print objfile
2941 every time, only when it changes. */
2942 static char *last_objfile_name
= NULL
;
2944 if (last_objfile_name
== NULL
2945 || strcmp (last_objfile_name
, objfile
->name
) != 0)
2947 xfree (last_objfile_name
);
2948 last_objfile_name
= xstrdup (objfile
->name
);
2949 fprintf_unfiltered (gdb_stdlog
,
2950 "Creating one or more symtabs for objfile %s ...\n",
2953 fprintf_unfiltered (gdb_stdlog
,
2954 "Created symtab %s for module %s.\n",
2955 host_address_to_string (symtab
), filename
);
2962 /* Reset all data structures in gdb which may contain references to symbol
2963 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2966 clear_symtab_users (int add_flags
)
2968 /* Someday, we should do better than this, by only blowing away
2969 the things that really need to be blown. */
2971 /* Clear the "current" symtab first, because it is no longer valid.
2972 breakpoint_re_set may try to access the current symtab. */
2973 clear_current_source_symtab_and_line ();
2976 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2977 breakpoint_re_set ();
2978 clear_last_displayed_sal ();
2979 clear_pc_function_cache ();
2980 observer_notify_new_objfile (NULL
);
2982 /* Clear globals which might have pointed into a removed objfile.
2983 FIXME: It's not clear which of these are supposed to persist
2984 between expressions and which ought to be reset each time. */
2985 expression_context_block
= NULL
;
2986 innermost_block
= NULL
;
2988 /* Varobj may refer to old symbols, perform a cleanup. */
2989 varobj_invalidate ();
2994 clear_symtab_users_cleanup (void *ignore
)
2996 clear_symtab_users (0);
3000 The following code implements an abstraction for debugging overlay sections.
3002 The target model is as follows:
3003 1) The gnu linker will permit multiple sections to be mapped into the
3004 same VMA, each with its own unique LMA (or load address).
3005 2) It is assumed that some runtime mechanism exists for mapping the
3006 sections, one by one, from the load address into the VMA address.
3007 3) This code provides a mechanism for gdb to keep track of which
3008 sections should be considered to be mapped from the VMA to the LMA.
3009 This information is used for symbol lookup, and memory read/write.
3010 For instance, if a section has been mapped then its contents
3011 should be read from the VMA, otherwise from the LMA.
3013 Two levels of debugger support for overlays are available. One is
3014 "manual", in which the debugger relies on the user to tell it which
3015 overlays are currently mapped. This level of support is
3016 implemented entirely in the core debugger, and the information about
3017 whether a section is mapped is kept in the objfile->obj_section table.
3019 The second level of support is "automatic", and is only available if
3020 the target-specific code provides functionality to read the target's
3021 overlay mapping table, and translate its contents for the debugger
3022 (by updating the mapped state information in the obj_section tables).
3024 The interface is as follows:
3026 overlay map <name> -- tell gdb to consider this section mapped
3027 overlay unmap <name> -- tell gdb to consider this section unmapped
3028 overlay list -- list the sections that GDB thinks are mapped
3029 overlay read-target -- get the target's state of what's mapped
3030 overlay off/manual/auto -- set overlay debugging state
3031 Functional interface:
3032 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3033 section, return that section.
3034 find_pc_overlay(pc): find any overlay section that contains
3035 the pc, either in its VMA or its LMA
3036 section_is_mapped(sect): true if overlay is marked as mapped
3037 section_is_overlay(sect): true if section's VMA != LMA
3038 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3039 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3040 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3041 overlay_mapped_address(...): map an address from section's LMA to VMA
3042 overlay_unmapped_address(...): map an address from section's VMA to LMA
3043 symbol_overlayed_address(...): Return a "current" address for symbol:
3044 either in VMA or LMA depending on whether
3045 the symbol's section is currently mapped. */
3047 /* Overlay debugging state: */
3049 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3050 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
3052 /* Function: section_is_overlay (SECTION)
3053 Returns true if SECTION has VMA not equal to LMA, ie.
3054 SECTION is loaded at an address different from where it will "run". */
3057 section_is_overlay (struct obj_section
*section
)
3059 if (overlay_debugging
&& section
)
3061 bfd
*abfd
= section
->objfile
->obfd
;
3062 asection
*bfd_section
= section
->the_bfd_section
;
3064 if (bfd_section_lma (abfd
, bfd_section
) != 0
3065 && bfd_section_lma (abfd
, bfd_section
)
3066 != bfd_section_vma (abfd
, bfd_section
))
3073 /* Function: overlay_invalidate_all (void)
3074 Invalidate the mapped state of all overlay sections (mark it as stale). */
3077 overlay_invalidate_all (void)
3079 struct objfile
*objfile
;
3080 struct obj_section
*sect
;
3082 ALL_OBJSECTIONS (objfile
, sect
)
3083 if (section_is_overlay (sect
))
3084 sect
->ovly_mapped
= -1;
3087 /* Function: section_is_mapped (SECTION)
3088 Returns true if section is an overlay, and is currently mapped.
3090 Access to the ovly_mapped flag is restricted to this function, so
3091 that we can do automatic update. If the global flag
3092 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3093 overlay_invalidate_all. If the mapped state of the particular
3094 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3097 section_is_mapped (struct obj_section
*osect
)
3099 struct gdbarch
*gdbarch
;
3101 if (osect
== 0 || !section_is_overlay (osect
))
3104 switch (overlay_debugging
)
3108 return 0; /* overlay debugging off */
3109 case ovly_auto
: /* overlay debugging automatic */
3110 /* Unles there is a gdbarch_overlay_update function,
3111 there's really nothing useful to do here (can't really go auto). */
3112 gdbarch
= get_objfile_arch (osect
->objfile
);
3113 if (gdbarch_overlay_update_p (gdbarch
))
3115 if (overlay_cache_invalid
)
3117 overlay_invalidate_all ();
3118 overlay_cache_invalid
= 0;
3120 if (osect
->ovly_mapped
== -1)
3121 gdbarch_overlay_update (gdbarch
, osect
);
3123 /* fall thru to manual case */
3124 case ovly_on
: /* overlay debugging manual */
3125 return osect
->ovly_mapped
== 1;
3129 /* Function: pc_in_unmapped_range
3130 If PC falls into the lma range of SECTION, return true, else false. */
3133 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3135 if (section_is_overlay (section
))
3137 bfd
*abfd
= section
->objfile
->obfd
;
3138 asection
*bfd_section
= section
->the_bfd_section
;
3140 /* We assume the LMA is relocated by the same offset as the VMA. */
3141 bfd_vma size
= bfd_get_section_size (bfd_section
);
3142 CORE_ADDR offset
= obj_section_offset (section
);
3144 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3145 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3152 /* Function: pc_in_mapped_range
3153 If PC falls into the vma range of SECTION, return true, else false. */
3156 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3158 if (section_is_overlay (section
))
3160 if (obj_section_addr (section
) <= pc
3161 && pc
< obj_section_endaddr (section
))
3169 /* Return true if the mapped ranges of sections A and B overlap, false
3172 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3174 CORE_ADDR a_start
= obj_section_addr (a
);
3175 CORE_ADDR a_end
= obj_section_endaddr (a
);
3176 CORE_ADDR b_start
= obj_section_addr (b
);
3177 CORE_ADDR b_end
= obj_section_endaddr (b
);
3179 return (a_start
< b_end
&& b_start
< a_end
);
3182 /* Function: overlay_unmapped_address (PC, SECTION)
3183 Returns the address corresponding to PC in the unmapped (load) range.
3184 May be the same as PC. */
3187 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3189 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3191 bfd
*abfd
= section
->objfile
->obfd
;
3192 asection
*bfd_section
= section
->the_bfd_section
;
3194 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3195 - bfd_section_vma (abfd
, bfd_section
);
3201 /* Function: overlay_mapped_address (PC, SECTION)
3202 Returns the address corresponding to PC in the mapped (runtime) range.
3203 May be the same as PC. */
3206 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3208 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3210 bfd
*abfd
= section
->objfile
->obfd
;
3211 asection
*bfd_section
= section
->the_bfd_section
;
3213 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3214 - bfd_section_lma (abfd
, bfd_section
);
3221 /* Function: symbol_overlayed_address
3222 Return one of two addresses (relative to the VMA or to the LMA),
3223 depending on whether the section is mapped or not. */
3226 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3228 if (overlay_debugging
)
3230 /* If the symbol has no section, just return its regular address. */
3233 /* If the symbol's section is not an overlay, just return its
3235 if (!section_is_overlay (section
))
3237 /* If the symbol's section is mapped, just return its address. */
3238 if (section_is_mapped (section
))
3241 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3242 * then return its LOADED address rather than its vma address!!
3244 return overlay_unmapped_address (address
, section
);
3249 /* Function: find_pc_overlay (PC)
3250 Return the best-match overlay section for PC:
3251 If PC matches a mapped overlay section's VMA, return that section.
3252 Else if PC matches an unmapped section's VMA, return that section.
3253 Else if PC matches an unmapped section's LMA, return that section. */
3255 struct obj_section
*
3256 find_pc_overlay (CORE_ADDR pc
)
3258 struct objfile
*objfile
;
3259 struct obj_section
*osect
, *best_match
= NULL
;
3261 if (overlay_debugging
)
3262 ALL_OBJSECTIONS (objfile
, osect
)
3263 if (section_is_overlay (osect
))
3265 if (pc_in_mapped_range (pc
, osect
))
3267 if (section_is_mapped (osect
))
3272 else if (pc_in_unmapped_range (pc
, osect
))
3278 /* Function: find_pc_mapped_section (PC)
3279 If PC falls into the VMA address range of an overlay section that is
3280 currently marked as MAPPED, return that section. Else return NULL. */
3282 struct obj_section
*
3283 find_pc_mapped_section (CORE_ADDR pc
)
3285 struct objfile
*objfile
;
3286 struct obj_section
*osect
;
3288 if (overlay_debugging
)
3289 ALL_OBJSECTIONS (objfile
, osect
)
3290 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3296 /* Function: list_overlays_command
3297 Print a list of mapped sections and their PC ranges. */
3300 list_overlays_command (char *args
, int from_tty
)
3303 struct objfile
*objfile
;
3304 struct obj_section
*osect
;
3306 if (overlay_debugging
)
3307 ALL_OBJSECTIONS (objfile
, osect
)
3308 if (section_is_mapped (osect
))
3310 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3315 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3316 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3317 size
= bfd_get_section_size (osect
->the_bfd_section
);
3318 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3320 printf_filtered ("Section %s, loaded at ", name
);
3321 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3322 puts_filtered (" - ");
3323 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3324 printf_filtered (", mapped at ");
3325 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3326 puts_filtered (" - ");
3327 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3328 puts_filtered ("\n");
3333 printf_filtered (_("No sections are mapped.\n"));
3336 /* Function: map_overlay_command
3337 Mark the named section as mapped (ie. residing at its VMA address). */
3340 map_overlay_command (char *args
, int from_tty
)
3342 struct objfile
*objfile
, *objfile2
;
3343 struct obj_section
*sec
, *sec2
;
3345 if (!overlay_debugging
)
3346 error (_("Overlay debugging not enabled. Use "
3347 "either the 'overlay auto' or\n"
3348 "the 'overlay manual' command."));
3350 if (args
== 0 || *args
== 0)
3351 error (_("Argument required: name of an overlay section"));
3353 /* First, find a section matching the user supplied argument. */
3354 ALL_OBJSECTIONS (objfile
, sec
)
3355 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3357 /* Now, check to see if the section is an overlay. */
3358 if (!section_is_overlay (sec
))
3359 continue; /* not an overlay section */
3361 /* Mark the overlay as "mapped". */
3362 sec
->ovly_mapped
= 1;
3364 /* Next, make a pass and unmap any sections that are
3365 overlapped by this new section: */
3366 ALL_OBJSECTIONS (objfile2
, sec2
)
3367 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3370 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3371 bfd_section_name (objfile
->obfd
,
3372 sec2
->the_bfd_section
));
3373 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3377 error (_("No overlay section called %s"), args
);
3380 /* Function: unmap_overlay_command
3381 Mark the overlay section as unmapped
3382 (ie. resident in its LMA address range, rather than the VMA range). */
3385 unmap_overlay_command (char *args
, int from_tty
)
3387 struct objfile
*objfile
;
3388 struct obj_section
*sec
;
3390 if (!overlay_debugging
)
3391 error (_("Overlay debugging not enabled. "
3392 "Use either the 'overlay auto' or\n"
3393 "the 'overlay manual' command."));
3395 if (args
== 0 || *args
== 0)
3396 error (_("Argument required: name of an overlay section"));
3398 /* First, find a section matching the user supplied argument. */
3399 ALL_OBJSECTIONS (objfile
, sec
)
3400 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3402 if (!sec
->ovly_mapped
)
3403 error (_("Section %s is not mapped"), args
);
3404 sec
->ovly_mapped
= 0;
3407 error (_("No overlay section called %s"), args
);
3410 /* Function: overlay_auto_command
3411 A utility command to turn on overlay debugging.
3412 Possibly this should be done via a set/show command. */
3415 overlay_auto_command (char *args
, int from_tty
)
3417 overlay_debugging
= ovly_auto
;
3418 enable_overlay_breakpoints ();
3420 printf_unfiltered (_("Automatic overlay debugging enabled."));
3423 /* Function: overlay_manual_command
3424 A utility command to turn on overlay debugging.
3425 Possibly this should be done via a set/show command. */
3428 overlay_manual_command (char *args
, int from_tty
)
3430 overlay_debugging
= ovly_on
;
3431 disable_overlay_breakpoints ();
3433 printf_unfiltered (_("Overlay debugging enabled."));
3436 /* Function: overlay_off_command
3437 A utility command to turn on overlay debugging.
3438 Possibly this should be done via a set/show command. */
3441 overlay_off_command (char *args
, int from_tty
)
3443 overlay_debugging
= ovly_off
;
3444 disable_overlay_breakpoints ();
3446 printf_unfiltered (_("Overlay debugging disabled."));
3450 overlay_load_command (char *args
, int from_tty
)
3452 struct gdbarch
*gdbarch
= get_current_arch ();
3454 if (gdbarch_overlay_update_p (gdbarch
))
3455 gdbarch_overlay_update (gdbarch
, NULL
);
3457 error (_("This target does not know how to read its overlay state."));
3460 /* Function: overlay_command
3461 A place-holder for a mis-typed command. */
3463 /* Command list chain containing all defined "overlay" subcommands. */
3464 static struct cmd_list_element
*overlaylist
;
3467 overlay_command (char *args
, int from_tty
)
3470 ("\"overlay\" must be followed by the name of an overlay command.\n");
3471 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3475 /* Target Overlays for the "Simplest" overlay manager:
3477 This is GDB's default target overlay layer. It works with the
3478 minimal overlay manager supplied as an example by Cygnus. The
3479 entry point is via a function pointer "gdbarch_overlay_update",
3480 so targets that use a different runtime overlay manager can
3481 substitute their own overlay_update function and take over the
3484 The overlay_update function pokes around in the target's data structures
3485 to see what overlays are mapped, and updates GDB's overlay mapping with
3488 In this simple implementation, the target data structures are as follows:
3489 unsigned _novlys; /# number of overlay sections #/
3490 unsigned _ovly_table[_novlys][4] = {
3491 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3492 {..., ..., ..., ...},
3494 unsigned _novly_regions; /# number of overlay regions #/
3495 unsigned _ovly_region_table[_novly_regions][3] = {
3496 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3499 These functions will attempt to update GDB's mappedness state in the
3500 symbol section table, based on the target's mappedness state.
3502 To do this, we keep a cached copy of the target's _ovly_table, and
3503 attempt to detect when the cached copy is invalidated. The main
3504 entry point is "simple_overlay_update(SECT), which looks up SECT in
3505 the cached table and re-reads only the entry for that section from
3506 the target (whenever possible). */
3508 /* Cached, dynamically allocated copies of the target data structures: */
3509 static unsigned (*cache_ovly_table
)[4] = 0;
3510 static unsigned cache_novlys
= 0;
3511 static CORE_ADDR cache_ovly_table_base
= 0;
3514 VMA
, SIZE
, LMA
, MAPPED
3517 /* Throw away the cached copy of _ovly_table. */
3519 simple_free_overlay_table (void)
3521 if (cache_ovly_table
)
3522 xfree (cache_ovly_table
);
3524 cache_ovly_table
= NULL
;
3525 cache_ovly_table_base
= 0;
3528 /* Read an array of ints of size SIZE from the target into a local buffer.
3529 Convert to host order. int LEN is number of ints. */
3531 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3532 int len
, int size
, enum bfd_endian byte_order
)
3534 /* FIXME (alloca): Not safe if array is very large. */
3535 gdb_byte
*buf
= alloca (len
* size
);
3538 read_memory (memaddr
, buf
, len
* size
);
3539 for (i
= 0; i
< len
; i
++)
3540 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3543 /* Find and grab a copy of the target _ovly_table
3544 (and _novlys, which is needed for the table's size). */
3546 simple_read_overlay_table (void)
3548 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3549 struct gdbarch
*gdbarch
;
3551 enum bfd_endian byte_order
;
3553 simple_free_overlay_table ();
3554 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3557 error (_("Error reading inferior's overlay table: "
3558 "couldn't find `_novlys' variable\n"
3559 "in inferior. Use `overlay manual' mode."));
3563 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3564 if (! ovly_table_msym
)
3566 error (_("Error reading inferior's overlay table: couldn't find "
3567 "`_ovly_table' array\n"
3568 "in inferior. Use `overlay manual' mode."));
3572 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3573 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3574 byte_order
= gdbarch_byte_order (gdbarch
);
3576 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3579 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3580 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3581 read_target_long_array (cache_ovly_table_base
,
3582 (unsigned int *) cache_ovly_table
,
3583 cache_novlys
* 4, word_size
, byte_order
);
3585 return 1; /* SUCCESS */
3588 /* Function: simple_overlay_update_1
3589 A helper function for simple_overlay_update. Assuming a cached copy
3590 of _ovly_table exists, look through it to find an entry whose vma,
3591 lma and size match those of OSECT. Re-read the entry and make sure
3592 it still matches OSECT (else the table may no longer be valid).
3593 Set OSECT's mapped state to match the entry. Return: 1 for
3594 success, 0 for failure. */
3597 simple_overlay_update_1 (struct obj_section
*osect
)
3600 bfd
*obfd
= osect
->objfile
->obfd
;
3601 asection
*bsect
= osect
->the_bfd_section
;
3602 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3603 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3604 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3606 size
= bfd_get_section_size (osect
->the_bfd_section
);
3607 for (i
= 0; i
< cache_novlys
; i
++)
3608 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3609 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3610 /* && cache_ovly_table[i][SIZE] == size */ )
3612 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3613 (unsigned int *) cache_ovly_table
[i
],
3614 4, word_size
, byte_order
);
3615 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3616 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3617 /* && cache_ovly_table[i][SIZE] == size */ )
3619 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3622 else /* Warning! Warning! Target's ovly table has changed! */
3628 /* Function: simple_overlay_update
3629 If OSECT is NULL, then update all sections' mapped state
3630 (after re-reading the entire target _ovly_table).
3631 If OSECT is non-NULL, then try to find a matching entry in the
3632 cached ovly_table and update only OSECT's mapped state.
3633 If a cached entry can't be found or the cache isn't valid, then
3634 re-read the entire cache, and go ahead and update all sections. */
3637 simple_overlay_update (struct obj_section
*osect
)
3639 struct objfile
*objfile
;
3641 /* Were we given an osect to look up? NULL means do all of them. */
3643 /* Have we got a cached copy of the target's overlay table? */
3644 if (cache_ovly_table
!= NULL
)
3646 /* Does its cached location match what's currently in the
3648 struct minimal_symbol
*minsym
3649 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3652 error (_("Error reading inferior's overlay table: couldn't "
3653 "find `_ovly_table' array\n"
3654 "in inferior. Use `overlay manual' mode."));
3656 if (cache_ovly_table_base
== SYMBOL_VALUE_ADDRESS (minsym
))
3657 /* Then go ahead and try to look up this single section in
3659 if (simple_overlay_update_1 (osect
))
3660 /* Found it! We're done. */
3664 /* Cached table no good: need to read the entire table anew.
3665 Or else we want all the sections, in which case it's actually
3666 more efficient to read the whole table in one block anyway. */
3668 if (! simple_read_overlay_table ())
3671 /* Now may as well update all sections, even if only one was requested. */
3672 ALL_OBJSECTIONS (objfile
, osect
)
3673 if (section_is_overlay (osect
))
3676 bfd
*obfd
= osect
->objfile
->obfd
;
3677 asection
*bsect
= osect
->the_bfd_section
;
3679 size
= bfd_get_section_size (bsect
);
3680 for (i
= 0; i
< cache_novlys
; i
++)
3681 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3682 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3683 /* && cache_ovly_table[i][SIZE] == size */ )
3684 { /* obj_section matches i'th entry in ovly_table. */
3685 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3686 break; /* finished with inner for loop: break out. */
3691 /* Set the output sections and output offsets for section SECTP in
3692 ABFD. The relocation code in BFD will read these offsets, so we
3693 need to be sure they're initialized. We map each section to itself,
3694 with no offset; this means that SECTP->vma will be honored. */
3697 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3699 sectp
->output_section
= sectp
;
3700 sectp
->output_offset
= 0;
3703 /* Default implementation for sym_relocate. */
3707 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3710 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3712 bfd
*abfd
= sectp
->owner
;
3714 /* We're only interested in sections with relocation
3716 if ((sectp
->flags
& SEC_RELOC
) == 0)
3719 /* We will handle section offsets properly elsewhere, so relocate as if
3720 all sections begin at 0. */
3721 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3723 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3726 /* Relocate the contents of a debug section SECTP in ABFD. The
3727 contents are stored in BUF if it is non-NULL, or returned in a
3728 malloc'd buffer otherwise.
3730 For some platforms and debug info formats, shared libraries contain
3731 relocations against the debug sections (particularly for DWARF-2;
3732 one affected platform is PowerPC GNU/Linux, although it depends on
3733 the version of the linker in use). Also, ELF object files naturally
3734 have unresolved relocations for their debug sections. We need to apply
3735 the relocations in order to get the locations of symbols correct.
3736 Another example that may require relocation processing, is the
3737 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3741 symfile_relocate_debug_section (struct objfile
*objfile
,
3742 asection
*sectp
, bfd_byte
*buf
)
3744 gdb_assert (objfile
->sf
->sym_relocate
);
3746 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3749 struct symfile_segment_data
*
3750 get_symfile_segment_data (bfd
*abfd
)
3752 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3757 return sf
->sym_segments (abfd
);
3761 free_symfile_segment_data (struct symfile_segment_data
*data
)
3763 xfree (data
->segment_bases
);
3764 xfree (data
->segment_sizes
);
3765 xfree (data
->segment_info
);
3771 - DATA, containing segment addresses from the object file ABFD, and
3772 the mapping from ABFD's sections onto the segments that own them,
3774 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3775 segment addresses reported by the target,
3776 store the appropriate offsets for each section in OFFSETS.
3778 If there are fewer entries in SEGMENT_BASES than there are segments
3779 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3781 If there are more entries, then ignore the extra. The target may
3782 not be able to distinguish between an empty data segment and a
3783 missing data segment; a missing text segment is less plausible. */
3785 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3786 struct section_offsets
*offsets
,
3787 int num_segment_bases
,
3788 const CORE_ADDR
*segment_bases
)
3793 /* It doesn't make sense to call this function unless you have some
3794 segment base addresses. */
3795 gdb_assert (num_segment_bases
> 0);
3797 /* If we do not have segment mappings for the object file, we
3798 can not relocate it by segments. */
3799 gdb_assert (data
!= NULL
);
3800 gdb_assert (data
->num_segments
> 0);
3802 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3804 int which
= data
->segment_info
[i
];
3806 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3808 /* Don't bother computing offsets for sections that aren't
3809 loaded as part of any segment. */
3813 /* Use the last SEGMENT_BASES entry as the address of any extra
3814 segments mentioned in DATA->segment_info. */
3815 if (which
> num_segment_bases
)
3816 which
= num_segment_bases
;
3818 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3819 - data
->segment_bases
[which
- 1]);
3826 symfile_find_segment_sections (struct objfile
*objfile
)
3828 bfd
*abfd
= objfile
->obfd
;
3831 struct symfile_segment_data
*data
;
3833 data
= get_symfile_segment_data (objfile
->obfd
);
3837 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3839 free_symfile_segment_data (data
);
3843 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3845 int which
= data
->segment_info
[i
];
3849 if (objfile
->sect_index_text
== -1)
3850 objfile
->sect_index_text
= sect
->index
;
3852 if (objfile
->sect_index_rodata
== -1)
3853 objfile
->sect_index_rodata
= sect
->index
;
3855 else if (which
== 2)
3857 if (objfile
->sect_index_data
== -1)
3858 objfile
->sect_index_data
= sect
->index
;
3860 if (objfile
->sect_index_bss
== -1)
3861 objfile
->sect_index_bss
= sect
->index
;
3865 free_symfile_segment_data (data
);
3869 _initialize_symfile (void)
3871 struct cmd_list_element
*c
;
3873 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3874 Load symbol table from executable file FILE.\n\
3875 The `file' command can also load symbol tables, as well as setting the file\n\
3876 to execute."), &cmdlist
);
3877 set_cmd_completer (c
, filename_completer
);
3879 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3880 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3881 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3882 ...]\nADDR is the starting address of the file's text.\n\
3883 The optional arguments are section-name section-address pairs and\n\
3884 should be specified if the data and bss segments are not contiguous\n\
3885 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3887 set_cmd_completer (c
, filename_completer
);
3889 c
= add_cmd ("load", class_files
, load_command
, _("\
3890 Dynamically load FILE into the running program, and record its symbols\n\
3891 for access from GDB.\n\
3892 A load OFFSET may also be given."), &cmdlist
);
3893 set_cmd_completer (c
, filename_completer
);
3895 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3896 _("Commands for debugging overlays."), &overlaylist
,
3897 "overlay ", 0, &cmdlist
);
3899 add_com_alias ("ovly", "overlay", class_alias
, 1);
3900 add_com_alias ("ov", "overlay", class_alias
, 1);
3902 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3903 _("Assert that an overlay section is mapped."), &overlaylist
);
3905 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3906 _("Assert that an overlay section is unmapped."), &overlaylist
);
3908 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3909 _("List mappings of overlay sections."), &overlaylist
);
3911 add_cmd ("manual", class_support
, overlay_manual_command
,
3912 _("Enable overlay debugging."), &overlaylist
);
3913 add_cmd ("off", class_support
, overlay_off_command
,
3914 _("Disable overlay debugging."), &overlaylist
);
3915 add_cmd ("auto", class_support
, overlay_auto_command
,
3916 _("Enable automatic overlay debugging."), &overlaylist
);
3917 add_cmd ("load-target", class_support
, overlay_load_command
,
3918 _("Read the overlay mapping state from the target."), &overlaylist
);
3920 /* Filename extension to source language lookup table: */
3921 init_filename_language_table ();
3922 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3924 Set mapping between filename extension and source language."), _("\
3925 Show mapping between filename extension and source language."), _("\
3926 Usage: set extension-language .foo bar"),
3927 set_ext_lang_command
,
3929 &setlist
, &showlist
);
3931 add_info ("extensions", info_ext_lang_command
,
3932 _("All filename extensions associated with a source language."));
3934 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3935 &debug_file_directory
, _("\
3936 Set the directories where separate debug symbols are searched for."), _("\
3937 Show the directories where separate debug symbols are searched for."), _("\
3938 Separate debug symbols are first searched for in the same\n\
3939 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3940 and lastly at the path of the directory of the binary with\n\
3941 each global debug-file-directory component prepended."),
3943 show_debug_file_directory
,
3944 &setlist
, &showlist
);