1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2014 Free Software Foundation, Inc.
5 Contributed by Cygnus Support, using pieces from other GDB modules.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "arch-utils.h"
35 #include "breakpoint.h"
37 #include "complaints.h"
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
47 #include "readline/readline.h"
48 #include "gdb_assert.h"
52 #include "parser-defs.h"
59 #include "cli/cli-utils.h"
62 #include <sys/types.h>
72 int (*deprecated_ui_load_progress_hook
) (const char *section
,
74 void (*deprecated_show_load_progress
) (const char *section
,
75 unsigned long section_sent
,
76 unsigned long section_size
,
77 unsigned long total_sent
,
78 unsigned long total_size
);
79 void (*deprecated_pre_add_symbol_hook
) (const char *);
80 void (*deprecated_post_add_symbol_hook
) (void);
82 static void clear_symtab_users_cleanup (void *ignore
);
84 /* Global variables owned by this file. */
85 int readnow_symbol_files
; /* Read full symbols immediately. */
87 /* Functions this file defines. */
89 static void load_command (char *, int);
91 static void symbol_file_add_main_1 (const char *args
, int from_tty
, int flags
);
93 static void add_symbol_file_command (char *, int);
95 static const struct sym_fns
*find_sym_fns (bfd
*);
97 static void decrement_reading_symtab (void *);
99 static void overlay_invalidate_all (void);
101 static void overlay_auto_command (char *, int);
103 static void overlay_manual_command (char *, int);
105 static void overlay_off_command (char *, int);
107 static void overlay_load_command (char *, int);
109 static void overlay_command (char *, int);
111 static void simple_free_overlay_table (void);
113 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
116 static int simple_read_overlay_table (void);
118 static int simple_overlay_update_1 (struct obj_section
*);
120 static void add_filename_language (char *ext
, enum language lang
);
122 static void info_ext_lang_command (char *args
, int from_tty
);
124 static void init_filename_language_table (void);
126 static void symfile_find_segment_sections (struct objfile
*objfile
);
128 void _initialize_symfile (void);
130 /* List of all available sym_fns. On gdb startup, each object file reader
131 calls add_symtab_fns() to register information on each format it is
136 /* BFD flavour that we handle. */
137 enum bfd_flavour sym_flavour
;
139 /* The "vtable" of symbol functions. */
140 const struct sym_fns
*sym_fns
;
141 } registered_sym_fns
;
143 DEF_VEC_O (registered_sym_fns
);
145 static VEC (registered_sym_fns
) *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 /* True if we are reading a symbol table. */
162 int currently_reading_symtab
= 0;
165 decrement_reading_symtab (void *dummy
)
167 currently_reading_symtab
--;
168 gdb_assert (currently_reading_symtab
>= 0);
171 /* Increment currently_reading_symtab and return a cleanup that can be
172 used to decrement it. */
175 increment_reading_symtab (void)
177 ++currently_reading_symtab
;
178 gdb_assert (currently_reading_symtab
> 0);
179 return make_cleanup (decrement_reading_symtab
, NULL
);
182 /* Remember the lowest-addressed loadable section we've seen.
183 This function is called via bfd_map_over_sections.
185 In case of equal vmas, the section with the largest size becomes the
186 lowest-addressed loadable section.
188 If the vmas and sizes are equal, the last section is considered the
189 lowest-addressed loadable section. */
192 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
194 asection
**lowest
= (asection
**) obj
;
196 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
199 *lowest
= sect
; /* First loadable section */
200 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
201 *lowest
= sect
; /* A lower loadable section */
202 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
203 && (bfd_section_size (abfd
, (*lowest
))
204 <= bfd_section_size (abfd
, sect
)))
208 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
209 new object's 'num_sections' field is set to 0; it must be updated
212 struct section_addr_info
*
213 alloc_section_addr_info (size_t num_sections
)
215 struct section_addr_info
*sap
;
218 size
= (sizeof (struct section_addr_info
)
219 + sizeof (struct other_sections
) * (num_sections
- 1));
220 sap
= (struct section_addr_info
*) xmalloc (size
);
221 memset (sap
, 0, size
);
226 /* Build (allocate and populate) a section_addr_info struct from
227 an existing section table. */
229 extern struct section_addr_info
*
230 build_section_addr_info_from_section_table (const struct target_section
*start
,
231 const struct target_section
*end
)
233 struct section_addr_info
*sap
;
234 const struct target_section
*stp
;
237 sap
= alloc_section_addr_info (end
- start
);
239 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
241 struct bfd_section
*asect
= stp
->the_bfd_section
;
242 bfd
*abfd
= asect
->owner
;
244 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
245 && oidx
< end
- start
)
247 sap
->other
[oidx
].addr
= stp
->addr
;
248 sap
->other
[oidx
].name
= xstrdup (bfd_section_name (abfd
, asect
));
249 sap
->other
[oidx
].sectindex
= gdb_bfd_section_index (abfd
, asect
);
254 sap
->num_sections
= oidx
;
259 /* Create a section_addr_info from section offsets in ABFD. */
261 static struct section_addr_info
*
262 build_section_addr_info_from_bfd (bfd
*abfd
)
264 struct section_addr_info
*sap
;
266 struct bfd_section
*sec
;
268 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
269 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
270 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
272 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
273 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
274 sap
->other
[i
].sectindex
= gdb_bfd_section_index (abfd
, sec
);
278 sap
->num_sections
= i
;
283 /* Create a section_addr_info from section offsets in OBJFILE. */
285 struct section_addr_info
*
286 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
288 struct section_addr_info
*sap
;
291 /* Before reread_symbols gets rewritten it is not safe to call:
292 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
294 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
295 for (i
= 0; i
< sap
->num_sections
; i
++)
297 int sectindex
= sap
->other
[i
].sectindex
;
299 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
304 /* Free all memory allocated by build_section_addr_info_from_section_table. */
307 free_section_addr_info (struct section_addr_info
*sap
)
311 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
312 xfree (sap
->other
[idx
].name
);
316 /* Initialize OBJFILE's sect_index_* members. */
319 init_objfile_sect_indices (struct objfile
*objfile
)
324 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
326 objfile
->sect_index_text
= sect
->index
;
328 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
330 objfile
->sect_index_data
= sect
->index
;
332 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
334 objfile
->sect_index_bss
= sect
->index
;
336 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
338 objfile
->sect_index_rodata
= sect
->index
;
340 /* This is where things get really weird... We MUST have valid
341 indices for the various sect_index_* members or gdb will abort.
342 So if for example, there is no ".text" section, we have to
343 accomodate that. First, check for a file with the standard
344 one or two segments. */
346 symfile_find_segment_sections (objfile
);
348 /* Except when explicitly adding symbol files at some address,
349 section_offsets contains nothing but zeros, so it doesn't matter
350 which slot in section_offsets the individual sect_index_* members
351 index into. So if they are all zero, it is safe to just point
352 all the currently uninitialized indices to the first slot. But
353 beware: if this is the main executable, it may be relocated
354 later, e.g. by the remote qOffsets packet, and then this will
355 be wrong! That's why we try segments first. */
357 for (i
= 0; i
< objfile
->num_sections
; i
++)
359 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
364 if (i
== objfile
->num_sections
)
366 if (objfile
->sect_index_text
== -1)
367 objfile
->sect_index_text
= 0;
368 if (objfile
->sect_index_data
== -1)
369 objfile
->sect_index_data
= 0;
370 if (objfile
->sect_index_bss
== -1)
371 objfile
->sect_index_bss
= 0;
372 if (objfile
->sect_index_rodata
== -1)
373 objfile
->sect_index_rodata
= 0;
377 /* The arguments to place_section. */
379 struct place_section_arg
381 struct section_offsets
*offsets
;
385 /* Find a unique offset to use for loadable section SECT if
386 the user did not provide an offset. */
389 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
391 struct place_section_arg
*arg
= obj
;
392 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
394 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
396 /* We are only interested in allocated sections. */
397 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
400 /* If the user specified an offset, honor it. */
401 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
404 /* Otherwise, let's try to find a place for the section. */
405 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
412 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
414 int indx
= cur_sec
->index
;
416 /* We don't need to compare against ourself. */
420 /* We can only conflict with allocated sections. */
421 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
424 /* If the section offset is 0, either the section has not been placed
425 yet, or it was the lowest section placed (in which case LOWEST
426 will be past its end). */
427 if (offsets
[indx
] == 0)
430 /* If this section would overlap us, then we must move up. */
431 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
432 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
434 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
435 start_addr
= (start_addr
+ align
- 1) & -align
;
440 /* Otherwise, we appear to be OK. So far. */
445 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
446 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
449 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
450 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
454 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
456 const struct section_addr_info
*addrs
)
460 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
462 /* Now calculate offsets for section that were specified by the caller. */
463 for (i
= 0; i
< addrs
->num_sections
; i
++)
465 const struct other_sections
*osp
;
467 osp
= &addrs
->other
[i
];
468 if (osp
->sectindex
== -1)
471 /* Record all sections in offsets. */
472 /* The section_offsets in the objfile are here filled in using
474 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
478 /* Transform section name S for a name comparison. prelink can split section
479 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
480 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
481 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
482 (`.sbss') section has invalid (increased) virtual address. */
485 addr_section_name (const char *s
)
487 if (strcmp (s
, ".dynbss") == 0)
489 if (strcmp (s
, ".sdynbss") == 0)
495 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
496 their (name, sectindex) pair. sectindex makes the sort by name stable. */
499 addrs_section_compar (const void *ap
, const void *bp
)
501 const struct other_sections
*a
= *((struct other_sections
**) ap
);
502 const struct other_sections
*b
= *((struct other_sections
**) bp
);
505 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
509 return a
->sectindex
- b
->sectindex
;
512 /* Provide sorted array of pointers to sections of ADDRS. The array is
513 terminated by NULL. Caller is responsible to call xfree for it. */
515 static struct other_sections
**
516 addrs_section_sort (struct section_addr_info
*addrs
)
518 struct other_sections
**array
;
521 /* `+ 1' for the NULL terminator. */
522 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
523 for (i
= 0; i
< addrs
->num_sections
; i
++)
524 array
[i
] = &addrs
->other
[i
];
527 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
532 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
533 also SECTINDEXes specific to ABFD there. This function can be used to
534 rebase ADDRS to start referencing different BFD than before. */
537 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
539 asection
*lower_sect
;
540 CORE_ADDR lower_offset
;
542 struct cleanup
*my_cleanup
;
543 struct section_addr_info
*abfd_addrs
;
544 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
545 struct other_sections
**addrs_to_abfd_addrs
;
547 /* Find lowest loadable section to be used as starting point for
548 continguous sections. */
550 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
551 if (lower_sect
== NULL
)
553 warning (_("no loadable sections found in added symbol-file %s"),
554 bfd_get_filename (abfd
));
558 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
560 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
561 in ABFD. Section names are not unique - there can be multiple sections of
562 the same name. Also the sections of the same name do not have to be
563 adjacent to each other. Some sections may be present only in one of the
564 files. Even sections present in both files do not have to be in the same
567 Use stable sort by name for the sections in both files. Then linearly
568 scan both lists matching as most of the entries as possible. */
570 addrs_sorted
= addrs_section_sort (addrs
);
571 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
573 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
574 make_cleanup_free_section_addr_info (abfd_addrs
);
575 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
576 make_cleanup (xfree
, abfd_addrs_sorted
);
578 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
579 ABFD_ADDRS_SORTED. */
581 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
582 * addrs
->num_sections
);
583 make_cleanup (xfree
, addrs_to_abfd_addrs
);
585 while (*addrs_sorted
)
587 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
589 while (*abfd_addrs_sorted
590 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
594 if (*abfd_addrs_sorted
595 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
600 /* Make the found item directly addressable from ADDRS. */
601 index_in_addrs
= *addrs_sorted
- addrs
->other
;
602 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
603 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
605 /* Never use the same ABFD entry twice. */
612 /* Calculate offsets for the loadable sections.
613 FIXME! Sections must be in order of increasing loadable section
614 so that contiguous sections can use the lower-offset!!!
616 Adjust offsets if the segments are not contiguous.
617 If the section is contiguous, its offset should be set to
618 the offset of the highest loadable section lower than it
619 (the loadable section directly below it in memory).
620 this_offset = lower_offset = lower_addr - lower_orig_addr */
622 for (i
= 0; i
< addrs
->num_sections
; i
++)
624 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
628 /* This is the index used by BFD. */
629 addrs
->other
[i
].sectindex
= sect
->sectindex
;
631 if (addrs
->other
[i
].addr
!= 0)
633 addrs
->other
[i
].addr
-= sect
->addr
;
634 lower_offset
= addrs
->other
[i
].addr
;
637 addrs
->other
[i
].addr
= lower_offset
;
641 /* addr_section_name transformation is not used for SECT_NAME. */
642 const char *sect_name
= addrs
->other
[i
].name
;
644 /* This section does not exist in ABFD, which is normally
645 unexpected and we want to issue a warning.
647 However, the ELF prelinker does create a few sections which are
648 marked in the main executable as loadable (they are loaded in
649 memory from the DYNAMIC segment) and yet are not present in
650 separate debug info files. This is fine, and should not cause
651 a warning. Shared libraries contain just the section
652 ".gnu.liblist" but it is not marked as loadable there. There is
653 no other way to identify them than by their name as the sections
654 created by prelink have no special flags.
656 For the sections `.bss' and `.sbss' see addr_section_name. */
658 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
659 || strcmp (sect_name
, ".gnu.conflict") == 0
660 || (strcmp (sect_name
, ".bss") == 0
662 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
663 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
664 || (strcmp (sect_name
, ".sbss") == 0
666 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
667 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
668 warning (_("section %s not found in %s"), sect_name
,
669 bfd_get_filename (abfd
));
671 addrs
->other
[i
].addr
= 0;
672 addrs
->other
[i
].sectindex
= -1;
676 do_cleanups (my_cleanup
);
679 /* Parse the user's idea of an offset for dynamic linking, into our idea
680 of how to represent it for fast symbol reading. This is the default
681 version of the sym_fns.sym_offsets function for symbol readers that
682 don't need to do anything special. It allocates a section_offsets table
683 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
686 default_symfile_offsets (struct objfile
*objfile
,
687 const struct section_addr_info
*addrs
)
689 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
690 objfile
->section_offsets
= (struct section_offsets
*)
691 obstack_alloc (&objfile
->objfile_obstack
,
692 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
693 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
694 objfile
->num_sections
, addrs
);
696 /* For relocatable files, all loadable sections will start at zero.
697 The zero is meaningless, so try to pick arbitrary addresses such
698 that no loadable sections overlap. This algorithm is quadratic,
699 but the number of sections in a single object file is generally
701 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
703 struct place_section_arg arg
;
704 bfd
*abfd
= objfile
->obfd
;
707 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
708 /* We do not expect this to happen; just skip this step if the
709 relocatable file has a section with an assigned VMA. */
710 if (bfd_section_vma (abfd
, cur_sec
) != 0)
715 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
717 /* Pick non-overlapping offsets for sections the user did not
719 arg
.offsets
= objfile
->section_offsets
;
721 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
723 /* Correctly filling in the section offsets is not quite
724 enough. Relocatable files have two properties that
725 (most) shared objects do not:
727 - Their debug information will contain relocations. Some
728 shared libraries do also, but many do not, so this can not
731 - If there are multiple code sections they will be loaded
732 at different relative addresses in memory than they are
733 in the objfile, since all sections in the file will start
736 Because GDB has very limited ability to map from an
737 address in debug info to the correct code section,
738 it relies on adding SECT_OFF_TEXT to things which might be
739 code. If we clear all the section offsets, and set the
740 section VMAs instead, then symfile_relocate_debug_section
741 will return meaningful debug information pointing at the
744 GDB has too many different data structures for section
745 addresses - a bfd, objfile, and so_list all have section
746 tables, as does exec_ops. Some of these could probably
749 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
750 cur_sec
= cur_sec
->next
)
752 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
755 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
756 exec_set_section_address (bfd_get_filename (abfd
),
758 offsets
[cur_sec
->index
]);
759 offsets
[cur_sec
->index
] = 0;
764 /* Remember the bfd indexes for the .text, .data, .bss and
766 init_objfile_sect_indices (objfile
);
769 /* Divide the file into segments, which are individual relocatable units.
770 This is the default version of the sym_fns.sym_segments function for
771 symbol readers that do not have an explicit representation of segments.
772 It assumes that object files do not have segments, and fully linked
773 files have a single segment. */
775 struct symfile_segment_data
*
776 default_symfile_segments (bfd
*abfd
)
780 struct symfile_segment_data
*data
;
783 /* Relocatable files contain enough information to position each
784 loadable section independently; they should not be relocated
786 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
789 /* Make sure there is at least one loadable section in the file. */
790 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
792 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
800 low
= bfd_get_section_vma (abfd
, sect
);
801 high
= low
+ bfd_get_section_size (sect
);
803 data
= XZALLOC (struct symfile_segment_data
);
804 data
->num_segments
= 1;
805 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
806 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
808 num_sections
= bfd_count_sections (abfd
);
809 data
->segment_info
= XCALLOC (num_sections
, int);
811 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
815 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
818 vma
= bfd_get_section_vma (abfd
, sect
);
821 if (vma
+ bfd_get_section_size (sect
) > high
)
822 high
= vma
+ bfd_get_section_size (sect
);
824 data
->segment_info
[i
] = 1;
827 data
->segment_bases
[0] = low
;
828 data
->segment_sizes
[0] = high
- low
;
833 /* This is a convenience function to call sym_read for OBJFILE and
834 possibly force the partial symbols to be read. */
837 read_symbols (struct objfile
*objfile
, int add_flags
)
839 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
841 /* find_separate_debug_file_in_section should be called only if there is
842 single binary with no existing separate debug info file. */
843 if (!objfile_has_partial_symbols (objfile
)
844 && objfile
->separate_debug_objfile
== NULL
845 && objfile
->separate_debug_objfile_backlink
== NULL
)
847 bfd
*abfd
= find_separate_debug_file_in_section (objfile
);
848 struct cleanup
*cleanup
= make_cleanup_bfd_unref (abfd
);
852 /* find_separate_debug_file_in_section uses the same filename for the
853 virtual section-as-bfd like the bfd filename containing the
854 section. Therefore use also non-canonical name form for the same
855 file containing the section. */
856 symbol_file_add_separate (abfd
, objfile
->original_name
, add_flags
,
860 do_cleanups (cleanup
);
862 if ((add_flags
& SYMFILE_NO_READ
) == 0)
863 require_partial_symbols (objfile
, 0);
866 /* Initialize entry point information for this objfile. */
869 init_entry_point_info (struct objfile
*objfile
)
871 /* Save startup file's range of PC addresses to help blockframe.c
872 decide where the bottom of the stack is. */
874 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
876 /* Executable file -- record its entry point so we'll recognize
877 the startup file because it contains the entry point. */
878 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
879 objfile
->ei
.entry_point_p
= 1;
881 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
882 && bfd_get_start_address (objfile
->obfd
) != 0)
884 /* Some shared libraries may have entry points set and be
885 runnable. There's no clear way to indicate this, so just check
886 for values other than zero. */
887 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
888 objfile
->ei
.entry_point_p
= 1;
892 /* Examination of non-executable.o files. Short-circuit this stuff. */
893 objfile
->ei
.entry_point_p
= 0;
896 if (objfile
->ei
.entry_point_p
)
898 CORE_ADDR entry_point
= objfile
->ei
.entry_point
;
900 /* Make certain that the address points at real code, and not a
901 function descriptor. */
903 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
907 /* Remove any ISA markers, so that this matches entries in the
909 objfile
->ei
.entry_point
910 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
914 /* Process a symbol file, as either the main file or as a dynamically
917 This function does not set the OBJFILE's entry-point info.
919 OBJFILE is where the symbols are to be read from.
921 ADDRS is the list of section load addresses. If the user has given
922 an 'add-symbol-file' command, then this is the list of offsets and
923 addresses he or she provided as arguments to the command; or, if
924 we're handling a shared library, these are the actual addresses the
925 sections are loaded at, according to the inferior's dynamic linker
926 (as gleaned by GDB's shared library code). We convert each address
927 into an offset from the section VMA's as it appears in the object
928 file, and then call the file's sym_offsets function to convert this
929 into a format-specific offset table --- a `struct section_offsets'.
931 ADD_FLAGS encodes verbosity level, whether this is main symbol or
932 an extra symbol file such as dynamically loaded code, and wether
933 breakpoint reset should be deferred. */
936 syms_from_objfile_1 (struct objfile
*objfile
,
937 struct section_addr_info
*addrs
,
940 struct section_addr_info
*local_addr
= NULL
;
941 struct cleanup
*old_chain
;
942 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
944 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
946 if (objfile
->sf
== NULL
)
948 /* No symbols to load, but we still need to make sure
949 that the section_offsets table is allocated. */
950 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
951 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
953 objfile
->num_sections
= num_sections
;
954 objfile
->section_offsets
955 = obstack_alloc (&objfile
->objfile_obstack
, size
);
956 memset (objfile
->section_offsets
, 0, size
);
960 /* Make sure that partially constructed symbol tables will be cleaned up
961 if an error occurs during symbol reading. */
962 old_chain
= make_cleanup_free_objfile (objfile
);
964 /* If ADDRS is NULL, put together a dummy address list.
965 We now establish the convention that an addr of zero means
966 no load address was specified. */
969 local_addr
= alloc_section_addr_info (1);
970 make_cleanup (xfree
, local_addr
);
976 /* We will modify the main symbol table, make sure that all its users
977 will be cleaned up if an error occurs during symbol reading. */
978 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
980 /* Since no error yet, throw away the old symbol table. */
982 if (symfile_objfile
!= NULL
)
984 free_objfile (symfile_objfile
);
985 gdb_assert (symfile_objfile
== NULL
);
988 /* Currently we keep symbols from the add-symbol-file command.
989 If the user wants to get rid of them, they should do "symbol-file"
990 without arguments first. Not sure this is the best behavior
993 (*objfile
->sf
->sym_new_init
) (objfile
);
996 /* Convert addr into an offset rather than an absolute address.
997 We find the lowest address of a loaded segment in the objfile,
998 and assume that <addr> is where that got loaded.
1000 We no longer warn if the lowest section is not a text segment (as
1001 happens for the PA64 port. */
1002 if (addrs
->num_sections
> 0)
1003 addr_info_make_relative (addrs
, objfile
->obfd
);
1005 /* Initialize symbol reading routines for this objfile, allow complaints to
1006 appear for this new file, and record how verbose to be, then do the
1007 initial symbol reading for this file. */
1009 (*objfile
->sf
->sym_init
) (objfile
);
1010 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1012 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1014 read_symbols (objfile
, add_flags
);
1016 /* Discard cleanups as symbol reading was successful. */
1018 discard_cleanups (old_chain
);
1022 /* Same as syms_from_objfile_1, but also initializes the objfile
1023 entry-point info. */
1026 syms_from_objfile (struct objfile
*objfile
,
1027 struct section_addr_info
*addrs
,
1030 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1031 init_entry_point_info (objfile
);
1034 /* Perform required actions after either reading in the initial
1035 symbols for a new objfile, or mapping in the symbols from a reusable
1036 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1039 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1041 /* If this is the main symbol file we have to clean up all users of the
1042 old main symbol file. Otherwise it is sufficient to fixup all the
1043 breakpoints that may have been redefined by this symbol file. */
1044 if (add_flags
& SYMFILE_MAINLINE
)
1046 /* OK, make it the "real" symbol file. */
1047 symfile_objfile
= objfile
;
1049 clear_symtab_users (add_flags
);
1051 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1053 breakpoint_re_set ();
1056 /* We're done reading the symbol file; finish off complaints. */
1057 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1060 /* Process a symbol file, as either the main file or as a dynamically
1063 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1064 A new reference is acquired by this function.
1066 For NAME description see allocate_objfile's definition.
1068 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1069 extra, such as dynamically loaded code, and what to do with breakpoins.
1071 ADDRS is as described for syms_from_objfile_1, above.
1072 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1074 PARENT is the original objfile if ABFD is a separate debug info file.
1075 Otherwise PARENT is NULL.
1077 Upon success, returns a pointer to the objfile that was added.
1078 Upon failure, jumps back to command level (never returns). */
1080 static struct objfile
*
1081 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
, int add_flags
,
1082 struct section_addr_info
*addrs
,
1083 int flags
, struct objfile
*parent
)
1085 struct objfile
*objfile
;
1086 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1087 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1088 const int should_print
= ((from_tty
|| info_verbose
)
1089 && (readnow_symbol_files
1090 || (add_flags
& SYMFILE_NO_READ
) == 0));
1092 if (readnow_symbol_files
)
1094 flags
|= OBJF_READNOW
;
1095 add_flags
&= ~SYMFILE_NO_READ
;
1098 /* Give user a chance to burp if we'd be
1099 interactively wiping out any existing symbols. */
1101 if ((have_full_symbols () || have_partial_symbols ())
1104 && !query (_("Load new symbol table from \"%s\"? "), name
))
1105 error (_("Not confirmed."));
1107 objfile
= allocate_objfile (abfd
, name
,
1108 flags
| (mainline
? OBJF_MAINLINE
: 0));
1111 add_separate_debug_objfile (objfile
, parent
);
1113 /* We either created a new mapped symbol table, mapped an existing
1114 symbol table file which has not had initial symbol reading
1115 performed, or need to read an unmapped symbol table. */
1118 if (deprecated_pre_add_symbol_hook
)
1119 deprecated_pre_add_symbol_hook (name
);
1122 printf_unfiltered (_("Reading symbols from %s..."), name
);
1124 gdb_flush (gdb_stdout
);
1127 syms_from_objfile (objfile
, addrs
, add_flags
);
1129 /* We now have at least a partial symbol table. Check to see if the
1130 user requested that all symbols be read on initial access via either
1131 the gdb startup command line or on a per symbol file basis. Expand
1132 all partial symbol tables for this objfile if so. */
1134 if ((flags
& OBJF_READNOW
))
1138 printf_unfiltered (_("expanding to full symbols..."));
1140 gdb_flush (gdb_stdout
);
1144 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1147 if (should_print
&& !objfile_has_symbols (objfile
))
1150 printf_unfiltered (_("(no debugging symbols found)..."));
1156 if (deprecated_post_add_symbol_hook
)
1157 deprecated_post_add_symbol_hook ();
1159 printf_unfiltered (_("done.\n"));
1162 /* We print some messages regardless of whether 'from_tty ||
1163 info_verbose' is true, so make sure they go out at the right
1165 gdb_flush (gdb_stdout
);
1167 if (objfile
->sf
== NULL
)
1169 observer_notify_new_objfile (objfile
);
1170 return objfile
; /* No symbols. */
1173 new_symfile_objfile (objfile
, add_flags
);
1175 observer_notify_new_objfile (objfile
);
1177 bfd_cache_close_all ();
1181 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1182 see allocate_objfile's definition. */
1185 symbol_file_add_separate (bfd
*bfd
, const char *name
, int symfile_flags
,
1186 struct objfile
*objfile
)
1188 struct objfile
*new_objfile
;
1189 struct section_addr_info
*sap
;
1190 struct cleanup
*my_cleanup
;
1192 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1193 because sections of BFD may not match sections of OBJFILE and because
1194 vma may have been modified by tools such as prelink. */
1195 sap
= build_section_addr_info_from_objfile (objfile
);
1196 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1198 new_objfile
= symbol_file_add_with_addrs
1199 (bfd
, name
, symfile_flags
, sap
,
1200 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1204 do_cleanups (my_cleanup
);
1207 /* Process the symbol file ABFD, as either the main file or as a
1208 dynamically loaded file.
1209 See symbol_file_add_with_addrs's comments for details. */
1212 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
, int add_flags
,
1213 struct section_addr_info
*addrs
,
1214 int flags
, struct objfile
*parent
)
1216 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1220 /* Process a symbol file, as either the main file or as a dynamically
1221 loaded file. See symbol_file_add_with_addrs's comments for details. */
1224 symbol_file_add (const char *name
, int add_flags
,
1225 struct section_addr_info
*addrs
, int flags
)
1227 bfd
*bfd
= symfile_bfd_open (name
);
1228 struct cleanup
*cleanup
= make_cleanup_bfd_unref (bfd
);
1229 struct objfile
*objf
;
1231 objf
= symbol_file_add_from_bfd (bfd
, name
, add_flags
, addrs
, flags
, NULL
);
1232 do_cleanups (cleanup
);
1236 /* Call symbol_file_add() with default values and update whatever is
1237 affected by the loading of a new main().
1238 Used when the file is supplied in the gdb command line
1239 and by some targets with special loading requirements.
1240 The auxiliary function, symbol_file_add_main_1(), has the flags
1241 argument for the switches that can only be specified in the symbol_file
1245 symbol_file_add_main (const char *args
, int from_tty
)
1247 symbol_file_add_main_1 (args
, from_tty
, 0);
1251 symbol_file_add_main_1 (const char *args
, int from_tty
, int flags
)
1253 const int add_flags
= (current_inferior ()->symfile_flags
1254 | SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0));
1256 symbol_file_add (args
, add_flags
, NULL
, flags
);
1258 /* Getting new symbols may change our opinion about
1259 what is frameless. */
1260 reinit_frame_cache ();
1262 if ((flags
& SYMFILE_NO_READ
) == 0)
1263 set_initial_language ();
1267 symbol_file_clear (int from_tty
)
1269 if ((have_full_symbols () || have_partial_symbols ())
1272 ? !query (_("Discard symbol table from `%s'? "),
1273 objfile_name (symfile_objfile
))
1274 : !query (_("Discard symbol table? "))))
1275 error (_("Not confirmed."));
1277 /* solib descriptors may have handles to objfiles. Wipe them before their
1278 objfiles get stale by free_all_objfiles. */
1279 no_shared_libraries (NULL
, from_tty
);
1281 free_all_objfiles ();
1283 gdb_assert (symfile_objfile
== NULL
);
1285 printf_unfiltered (_("No symbol file now.\n"));
1289 separate_debug_file_exists (const char *name
, unsigned long crc
,
1290 struct objfile
*parent_objfile
)
1292 unsigned long file_crc
;
1295 struct stat parent_stat
, abfd_stat
;
1296 int verified_as_different
;
1298 /* Find a separate debug info file as if symbols would be present in
1299 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1300 section can contain just the basename of PARENT_OBJFILE without any
1301 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1302 the separate debug infos with the same basename can exist. */
1304 if (filename_cmp (name
, objfile_name (parent_objfile
)) == 0)
1307 abfd
= gdb_bfd_open_maybe_remote (name
);
1312 /* Verify symlinks were not the cause of filename_cmp name difference above.
1314 Some operating systems, e.g. Windows, do not provide a meaningful
1315 st_ino; they always set it to zero. (Windows does provide a
1316 meaningful st_dev.) Do not indicate a duplicate library in that
1317 case. While there is no guarantee that a system that provides
1318 meaningful inode numbers will never set st_ino to zero, this is
1319 merely an optimization, so we do not need to worry about false
1322 if (bfd_stat (abfd
, &abfd_stat
) == 0
1323 && abfd_stat
.st_ino
!= 0
1324 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1326 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1327 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1329 gdb_bfd_unref (abfd
);
1332 verified_as_different
= 1;
1335 verified_as_different
= 0;
1337 file_crc_p
= gdb_bfd_crc (abfd
, &file_crc
);
1339 gdb_bfd_unref (abfd
);
1344 if (crc
!= file_crc
)
1346 unsigned long parent_crc
;
1348 /* If one (or both) the files are accessed for example the via "remote:"
1349 gdbserver way it does not support the bfd_stat operation. Verify
1350 whether those two files are not the same manually. */
1352 if (!verified_as_different
)
1354 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1358 if (verified_as_different
|| parent_crc
!= file_crc
)
1359 warning (_("the debug information found in \"%s\""
1360 " does not match \"%s\" (CRC mismatch).\n"),
1361 name
, objfile_name (parent_objfile
));
1369 char *debug_file_directory
= NULL
;
1371 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1372 struct cmd_list_element
*c
, const char *value
)
1374 fprintf_filtered (file
,
1375 _("The directory where separate debug "
1376 "symbols are searched for is \"%s\".\n"),
1380 #if ! defined (DEBUG_SUBDIRECTORY)
1381 #define DEBUG_SUBDIRECTORY ".debug"
1384 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1385 where the original file resides (may not be the same as
1386 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1387 looking for. CANON_DIR is the "realpath" form of DIR.
1388 DIR must contain a trailing '/'.
1389 Returns the path of the file with separate debug info, of NULL. */
1392 find_separate_debug_file (const char *dir
,
1393 const char *canon_dir
,
1394 const char *debuglink
,
1395 unsigned long crc32
, struct objfile
*objfile
)
1400 VEC (char_ptr
) *debugdir_vec
;
1401 struct cleanup
*back_to
;
1404 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1406 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1407 i
= strlen (canon_dir
);
1409 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1411 + strlen (DEBUG_SUBDIRECTORY
)
1413 + strlen (debuglink
)
1416 /* First try in the same directory as the original file. */
1417 strcpy (debugfile
, dir
);
1418 strcat (debugfile
, debuglink
);
1420 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1423 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1424 strcpy (debugfile
, dir
);
1425 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1426 strcat (debugfile
, "/");
1427 strcat (debugfile
, debuglink
);
1429 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1432 /* Then try in the global debugfile directories.
1434 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1435 cause "/..." lookups. */
1437 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1438 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1440 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1442 strcpy (debugfile
, debugdir
);
1443 strcat (debugfile
, "/");
1444 strcat (debugfile
, dir
);
1445 strcat (debugfile
, debuglink
);
1447 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1449 do_cleanups (back_to
);
1453 /* If the file is in the sysroot, try using its base path in the
1454 global debugfile directory. */
1455 if (canon_dir
!= NULL
1456 && filename_ncmp (canon_dir
, gdb_sysroot
,
1457 strlen (gdb_sysroot
)) == 0
1458 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1460 strcpy (debugfile
, debugdir
);
1461 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1462 strcat (debugfile
, "/");
1463 strcat (debugfile
, debuglink
);
1465 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1467 do_cleanups (back_to
);
1473 do_cleanups (back_to
);
1478 /* Modify PATH to contain only "[/]directory/" part of PATH.
1479 If there were no directory separators in PATH, PATH will be empty
1480 string on return. */
1483 terminate_after_last_dir_separator (char *path
)
1487 /* Strip off the final filename part, leaving the directory name,
1488 followed by a slash. The directory can be relative or absolute. */
1489 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1490 if (IS_DIR_SEPARATOR (path
[i
]))
1493 /* If I is -1 then no directory is present there and DIR will be "". */
1497 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1498 Returns pathname, or NULL. */
1501 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1504 char *dir
, *canon_dir
;
1506 unsigned long crc32
;
1507 struct cleanup
*cleanups
;
1509 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1511 if (debuglink
== NULL
)
1513 /* There's no separate debug info, hence there's no way we could
1514 load it => no warning. */
1518 cleanups
= make_cleanup (xfree
, debuglink
);
1519 dir
= xstrdup (objfile_name (objfile
));
1520 make_cleanup (xfree
, dir
);
1521 terminate_after_last_dir_separator (dir
);
1522 canon_dir
= lrealpath (dir
);
1524 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1528 if (debugfile
== NULL
)
1531 /* For PR gdb/9538, try again with realpath (if different from the
1536 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1537 && S_ISLNK (st_buf
.st_mode
))
1541 symlink_dir
= lrealpath (objfile_name (objfile
));
1542 if (symlink_dir
!= NULL
)
1544 make_cleanup (xfree
, symlink_dir
);
1545 terminate_after_last_dir_separator (symlink_dir
);
1546 if (strcmp (dir
, symlink_dir
) != 0)
1548 /* Different directory, so try using it. */
1549 debugfile
= find_separate_debug_file (symlink_dir
,
1557 #endif /* HAVE_LSTAT */
1560 do_cleanups (cleanups
);
1564 /* This is the symbol-file command. Read the file, analyze its
1565 symbols, and add a struct symtab to a symtab list. The syntax of
1566 the command is rather bizarre:
1568 1. The function buildargv implements various quoting conventions
1569 which are undocumented and have little or nothing in common with
1570 the way things are quoted (or not quoted) elsewhere in GDB.
1572 2. Options are used, which are not generally used in GDB (perhaps
1573 "set mapped on", "set readnow on" would be better)
1575 3. The order of options matters, which is contrary to GNU
1576 conventions (because it is confusing and inconvenient). */
1579 symbol_file_command (char *args
, int from_tty
)
1585 symbol_file_clear (from_tty
);
1589 char **argv
= gdb_buildargv (args
);
1590 int flags
= OBJF_USERLOADED
;
1591 struct cleanup
*cleanups
;
1594 cleanups
= make_cleanup_freeargv (argv
);
1595 while (*argv
!= NULL
)
1597 if (strcmp (*argv
, "-readnow") == 0)
1598 flags
|= OBJF_READNOW
;
1599 else if (**argv
== '-')
1600 error (_("unknown option `%s'"), *argv
);
1603 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1611 error (_("no symbol file name was specified"));
1613 do_cleanups (cleanups
);
1617 /* Set the initial language.
1619 FIXME: A better solution would be to record the language in the
1620 psymtab when reading partial symbols, and then use it (if known) to
1621 set the language. This would be a win for formats that encode the
1622 language in an easily discoverable place, such as DWARF. For
1623 stabs, we can jump through hoops looking for specially named
1624 symbols or try to intuit the language from the specific type of
1625 stabs we find, but we can't do that until later when we read in
1629 set_initial_language (void)
1631 enum language lang
= language_unknown
;
1633 if (language_of_main
!= language_unknown
)
1634 lang
= language_of_main
;
1637 char *name
= main_name ();
1638 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
);
1641 lang
= SYMBOL_LANGUAGE (sym
);
1644 if (lang
== language_unknown
)
1646 /* Make C the default language */
1650 set_language (lang
);
1651 expected_language
= current_language
; /* Don't warn the user. */
1654 /* If NAME is a remote name open the file using remote protocol, otherwise
1655 open it normally. Returns a new reference to the BFD. On error,
1656 returns NULL with the BFD error set. */
1659 gdb_bfd_open_maybe_remote (const char *name
)
1663 if (remote_filename_p (name
))
1664 result
= remote_bfd_open (name
, gnutarget
);
1666 result
= gdb_bfd_open (name
, gnutarget
, -1);
1671 /* Open the file specified by NAME and hand it off to BFD for
1672 preliminary analysis. Return a newly initialized bfd *, which
1673 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1674 absolute). In case of trouble, error() is called. */
1677 symfile_bfd_open (const char *cname
)
1681 char *name
, *absolute_name
;
1682 struct cleanup
*back_to
;
1684 if (remote_filename_p (cname
))
1686 sym_bfd
= remote_bfd_open (cname
, gnutarget
);
1688 error (_("`%s': can't open to read symbols: %s."), cname
,
1689 bfd_errmsg (bfd_get_error ()));
1691 if (!bfd_check_format (sym_bfd
, bfd_object
))
1693 make_cleanup_bfd_unref (sym_bfd
);
1694 error (_("`%s': can't read symbols: %s."), cname
,
1695 bfd_errmsg (bfd_get_error ()));
1701 name
= tilde_expand (cname
); /* Returns 1st new malloc'd copy. */
1703 /* Look down path for it, allocate 2nd new malloc'd copy. */
1704 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
, name
,
1705 O_RDONLY
| O_BINARY
, &absolute_name
);
1706 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1709 char *exename
= alloca (strlen (name
) + 5);
1711 strcat (strcpy (exename
, name
), ".exe");
1712 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1713 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1718 make_cleanup (xfree
, name
);
1719 perror_with_name (name
);
1723 name
= absolute_name
;
1724 back_to
= make_cleanup (xfree
, name
);
1726 sym_bfd
= gdb_bfd_open (name
, gnutarget
, desc
);
1728 error (_("`%s': can't open to read symbols: %s."), name
,
1729 bfd_errmsg (bfd_get_error ()));
1730 bfd_set_cacheable (sym_bfd
, 1);
1732 if (!bfd_check_format (sym_bfd
, bfd_object
))
1734 make_cleanup_bfd_unref (sym_bfd
);
1735 error (_("`%s': can't read symbols: %s."), name
,
1736 bfd_errmsg (bfd_get_error ()));
1739 do_cleanups (back_to
);
1744 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1745 the section was not found. */
1748 get_section_index (struct objfile
*objfile
, char *section_name
)
1750 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1758 /* Link SF into the global symtab_fns list.
1759 FLAVOUR is the file format that SF handles.
1760 Called on startup by the _initialize routine in each object file format
1761 reader, to register information about each format the reader is prepared
1765 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1767 registered_sym_fns fns
= { flavour
, sf
};
1769 VEC_safe_push (registered_sym_fns
, symtab_fns
, &fns
);
1772 /* Initialize OBJFILE to read symbols from its associated BFD. It
1773 either returns or calls error(). The result is an initialized
1774 struct sym_fns in the objfile structure, that contains cached
1775 information about the symbol file. */
1777 static const struct sym_fns
*
1778 find_sym_fns (bfd
*abfd
)
1780 registered_sym_fns
*rsf
;
1781 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1784 if (our_flavour
== bfd_target_srec_flavour
1785 || our_flavour
== bfd_target_ihex_flavour
1786 || our_flavour
== bfd_target_tekhex_flavour
)
1787 return NULL
; /* No symbols. */
1789 for (i
= 0; VEC_iterate (registered_sym_fns
, symtab_fns
, i
, rsf
); ++i
)
1790 if (our_flavour
== rsf
->sym_flavour
)
1791 return rsf
->sym_fns
;
1793 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1794 bfd_get_target (abfd
));
1798 /* This function runs the load command of our current target. */
1801 load_command (char *arg
, int from_tty
)
1803 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1807 /* The user might be reloading because the binary has changed. Take
1808 this opportunity to check. */
1809 reopen_exec_file ();
1817 parg
= arg
= get_exec_file (1);
1819 /* Count how many \ " ' tab space there are in the name. */
1820 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1828 /* We need to quote this string so buildargv can pull it apart. */
1829 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1833 make_cleanup (xfree
, temp
);
1836 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1838 strncpy (ptemp
, prev
, parg
- prev
);
1839 ptemp
+= parg
- prev
;
1843 strcpy (ptemp
, prev
);
1849 target_load (arg
, from_tty
);
1851 /* After re-loading the executable, we don't really know which
1852 overlays are mapped any more. */
1853 overlay_cache_invalid
= 1;
1855 do_cleanups (cleanup
);
1858 /* This version of "load" should be usable for any target. Currently
1859 it is just used for remote targets, not inftarg.c or core files,
1860 on the theory that only in that case is it useful.
1862 Avoiding xmodem and the like seems like a win (a) because we don't have
1863 to worry about finding it, and (b) On VMS, fork() is very slow and so
1864 we don't want to run a subprocess. On the other hand, I'm not sure how
1865 performance compares. */
1867 static int validate_download
= 0;
1869 /* Callback service function for generic_load (bfd_map_over_sections). */
1872 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1874 bfd_size_type
*sum
= data
;
1876 *sum
+= bfd_get_section_size (asec
);
1879 /* Opaque data for load_section_callback. */
1880 struct load_section_data
{
1881 CORE_ADDR load_offset
;
1882 struct load_progress_data
*progress_data
;
1883 VEC(memory_write_request_s
) *requests
;
1886 /* Opaque data for load_progress. */
1887 struct load_progress_data
{
1888 /* Cumulative data. */
1889 unsigned long write_count
;
1890 unsigned long data_count
;
1891 bfd_size_type total_size
;
1894 /* Opaque data for load_progress for a single section. */
1895 struct load_progress_section_data
{
1896 struct load_progress_data
*cumulative
;
1898 /* Per-section data. */
1899 const char *section_name
;
1900 ULONGEST section_sent
;
1901 ULONGEST section_size
;
1906 /* Target write callback routine for progress reporting. */
1909 load_progress (ULONGEST bytes
, void *untyped_arg
)
1911 struct load_progress_section_data
*args
= untyped_arg
;
1912 struct load_progress_data
*totals
;
1915 /* Writing padding data. No easy way to get at the cumulative
1916 stats, so just ignore this. */
1919 totals
= args
->cumulative
;
1921 if (bytes
== 0 && args
->section_sent
== 0)
1923 /* The write is just starting. Let the user know we've started
1925 ui_out_message (current_uiout
, 0, "Loading section %s, size %s lma %s\n",
1926 args
->section_name
, hex_string (args
->section_size
),
1927 paddress (target_gdbarch (), args
->lma
));
1931 if (validate_download
)
1933 /* Broken memories and broken monitors manifest themselves here
1934 when bring new computers to life. This doubles already slow
1936 /* NOTE: cagney/1999-10-18: A more efficient implementation
1937 might add a verify_memory() method to the target vector and
1938 then use that. remote.c could implement that method using
1939 the ``qCRC'' packet. */
1940 gdb_byte
*check
= xmalloc (bytes
);
1941 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1943 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1944 error (_("Download verify read failed at %s"),
1945 paddress (target_gdbarch (), args
->lma
));
1946 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1947 error (_("Download verify compare failed at %s"),
1948 paddress (target_gdbarch (), args
->lma
));
1949 do_cleanups (verify_cleanups
);
1951 totals
->data_count
+= bytes
;
1953 args
->buffer
+= bytes
;
1954 totals
->write_count
+= 1;
1955 args
->section_sent
+= bytes
;
1956 if (check_quit_flag ()
1957 || (deprecated_ui_load_progress_hook
!= NULL
1958 && deprecated_ui_load_progress_hook (args
->section_name
,
1959 args
->section_sent
)))
1960 error (_("Canceled the download"));
1962 if (deprecated_show_load_progress
!= NULL
)
1963 deprecated_show_load_progress (args
->section_name
,
1967 totals
->total_size
);
1970 /* Callback service function for generic_load (bfd_map_over_sections). */
1973 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1975 struct memory_write_request
*new_request
;
1976 struct load_section_data
*args
= data
;
1977 struct load_progress_section_data
*section_data
;
1978 bfd_size_type size
= bfd_get_section_size (asec
);
1980 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1982 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1988 new_request
= VEC_safe_push (memory_write_request_s
,
1989 args
->requests
, NULL
);
1990 memset (new_request
, 0, sizeof (struct memory_write_request
));
1991 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1992 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1993 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
1995 new_request
->data
= xmalloc (size
);
1996 new_request
->baton
= section_data
;
1998 buffer
= new_request
->data
;
2000 section_data
->cumulative
= args
->progress_data
;
2001 section_data
->section_name
= sect_name
;
2002 section_data
->section_size
= size
;
2003 section_data
->lma
= new_request
->begin
;
2004 section_data
->buffer
= buffer
;
2006 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2009 /* Clean up an entire memory request vector, including load
2010 data and progress records. */
2013 clear_memory_write_data (void *arg
)
2015 VEC(memory_write_request_s
) **vec_p
= arg
;
2016 VEC(memory_write_request_s
) *vec
= *vec_p
;
2018 struct memory_write_request
*mr
;
2020 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2025 VEC_free (memory_write_request_s
, vec
);
2029 generic_load (char *args
, int from_tty
)
2032 struct timeval start_time
, end_time
;
2034 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2035 struct load_section_data cbdata
;
2036 struct load_progress_data total_progress
;
2037 struct ui_out
*uiout
= current_uiout
;
2042 memset (&cbdata
, 0, sizeof (cbdata
));
2043 memset (&total_progress
, 0, sizeof (total_progress
));
2044 cbdata
.progress_data
= &total_progress
;
2046 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2049 error_no_arg (_("file to load"));
2051 argv
= gdb_buildargv (args
);
2052 make_cleanup_freeargv (argv
);
2054 filename
= tilde_expand (argv
[0]);
2055 make_cleanup (xfree
, filename
);
2057 if (argv
[1] != NULL
)
2061 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2063 /* If the last word was not a valid number then
2064 treat it as a file name with spaces in. */
2065 if (argv
[1] == endptr
)
2066 error (_("Invalid download offset:%s."), argv
[1]);
2068 if (argv
[2] != NULL
)
2069 error (_("Too many parameters."));
2072 /* Open the file for loading. */
2073 loadfile_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2074 if (loadfile_bfd
== NULL
)
2076 perror_with_name (filename
);
2080 make_cleanup_bfd_unref (loadfile_bfd
);
2082 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2084 error (_("\"%s\" is not an object file: %s"), filename
,
2085 bfd_errmsg (bfd_get_error ()));
2088 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2089 (void *) &total_progress
.total_size
);
2091 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2093 gettimeofday (&start_time
, NULL
);
2095 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2096 load_progress
) != 0)
2097 error (_("Load failed"));
2099 gettimeofday (&end_time
, NULL
);
2101 entry
= bfd_get_start_address (loadfile_bfd
);
2102 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2103 ui_out_text (uiout
, "Start address ");
2104 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch (), entry
));
2105 ui_out_text (uiout
, ", load size ");
2106 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2107 ui_out_text (uiout
, "\n");
2108 /* We were doing this in remote-mips.c, I suspect it is right
2109 for other targets too. */
2110 regcache_write_pc (get_current_regcache (), entry
);
2112 /* Reset breakpoints, now that we have changed the load image. For
2113 instance, breakpoints may have been set (or reset, by
2114 post_create_inferior) while connected to the target but before we
2115 loaded the program. In that case, the prologue analyzer could
2116 have read instructions from the target to find the right
2117 breakpoint locations. Loading has changed the contents of that
2120 breakpoint_re_set ();
2122 /* FIXME: are we supposed to call symbol_file_add or not? According
2123 to a comment from remote-mips.c (where a call to symbol_file_add
2124 was commented out), making the call confuses GDB if more than one
2125 file is loaded in. Some targets do (e.g., remote-vx.c) but
2126 others don't (or didn't - perhaps they have all been deleted). */
2128 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2129 total_progress
.write_count
,
2130 &start_time
, &end_time
);
2132 do_cleanups (old_cleanups
);
2135 /* Report how fast the transfer went. */
2138 print_transfer_performance (struct ui_file
*stream
,
2139 unsigned long data_count
,
2140 unsigned long write_count
,
2141 const struct timeval
*start_time
,
2142 const struct timeval
*end_time
)
2144 ULONGEST time_count
;
2145 struct ui_out
*uiout
= current_uiout
;
2147 /* Compute the elapsed time in milliseconds, as a tradeoff between
2148 accuracy and overflow. */
2149 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2150 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2152 ui_out_text (uiout
, "Transfer rate: ");
2155 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2157 if (ui_out_is_mi_like_p (uiout
))
2159 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2160 ui_out_text (uiout
, " bits/sec");
2162 else if (rate
< 1024)
2164 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2165 ui_out_text (uiout
, " bytes/sec");
2169 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2170 ui_out_text (uiout
, " KB/sec");
2175 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2176 ui_out_text (uiout
, " bits in <1 sec");
2178 if (write_count
> 0)
2180 ui_out_text (uiout
, ", ");
2181 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2182 ui_out_text (uiout
, " bytes/write");
2184 ui_out_text (uiout
, ".\n");
2187 /* This function allows the addition of incrementally linked object files.
2188 It does not modify any state in the target, only in the debugger. */
2189 /* Note: ezannoni 2000-04-13 This function/command used to have a
2190 special case syntax for the rombug target (Rombug is the boot
2191 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2192 rombug case, the user doesn't need to supply a text address,
2193 instead a call to target_link() (in target.c) would supply the
2194 value to use. We are now discontinuing this type of ad hoc syntax. */
2197 add_symbol_file_command (char *args
, int from_tty
)
2199 struct gdbarch
*gdbarch
= get_current_arch ();
2200 char *filename
= NULL
;
2201 int flags
= OBJF_USERLOADED
;
2203 int section_index
= 0;
2207 int expecting_sec_name
= 0;
2208 int expecting_sec_addr
= 0;
2210 struct objfile
*objf
;
2218 struct section_addr_info
*section_addrs
;
2219 struct sect_opt
*sect_opts
= NULL
;
2220 size_t num_sect_opts
= 0;
2221 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2224 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2225 * sizeof (struct sect_opt
));
2230 error (_("add-symbol-file takes a file name and an address"));
2232 argv
= gdb_buildargv (args
);
2233 make_cleanup_freeargv (argv
);
2235 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2237 /* Process the argument. */
2240 /* The first argument is the file name. */
2241 filename
= tilde_expand (arg
);
2242 make_cleanup (xfree
, filename
);
2244 else if (argcnt
== 1)
2246 /* The second argument is always the text address at which
2247 to load the program. */
2248 sect_opts
[section_index
].name
= ".text";
2249 sect_opts
[section_index
].value
= arg
;
2250 if (++section_index
>= num_sect_opts
)
2253 sect_opts
= ((struct sect_opt
*)
2254 xrealloc (sect_opts
,
2256 * sizeof (struct sect_opt
)));
2261 /* It's an option (starting with '-') or it's an argument
2263 if (expecting_sec_name
)
2265 sect_opts
[section_index
].name
= arg
;
2266 expecting_sec_name
= 0;
2268 else if (expecting_sec_addr
)
2270 sect_opts
[section_index
].value
= arg
;
2271 expecting_sec_addr
= 0;
2272 if (++section_index
>= num_sect_opts
)
2275 sect_opts
= ((struct sect_opt
*)
2276 xrealloc (sect_opts
,
2278 * sizeof (struct sect_opt
)));
2281 else if (strcmp (arg
, "-readnow") == 0)
2282 flags
|= OBJF_READNOW
;
2283 else if (strcmp (arg
, "-s") == 0)
2285 expecting_sec_name
= 1;
2286 expecting_sec_addr
= 1;
2289 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2290 " [-readnow] [-s <secname> <addr>]*"));
2294 /* This command takes at least two arguments. The first one is a
2295 filename, and the second is the address where this file has been
2296 loaded. Abort now if this address hasn't been provided by the
2298 if (section_index
< 1)
2299 error (_("The address where %s has been loaded is missing"), filename
);
2301 /* Print the prompt for the query below. And save the arguments into
2302 a sect_addr_info structure to be passed around to other
2303 functions. We have to split this up into separate print
2304 statements because hex_string returns a local static
2307 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2308 section_addrs
= alloc_section_addr_info (section_index
);
2309 make_cleanup (xfree
, section_addrs
);
2310 for (i
= 0; i
< section_index
; i
++)
2313 char *val
= sect_opts
[i
].value
;
2314 char *sec
= sect_opts
[i
].name
;
2316 addr
= parse_and_eval_address (val
);
2318 /* Here we store the section offsets in the order they were
2319 entered on the command line. */
2320 section_addrs
->other
[sec_num
].name
= sec
;
2321 section_addrs
->other
[sec_num
].addr
= addr
;
2322 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2323 paddress (gdbarch
, addr
));
2326 /* The object's sections are initialized when a
2327 call is made to build_objfile_section_table (objfile).
2328 This happens in reread_symbols.
2329 At this point, we don't know what file type this is,
2330 so we can't determine what section names are valid. */
2332 section_addrs
->num_sections
= sec_num
;
2334 if (from_tty
&& (!query ("%s", "")))
2335 error (_("Not confirmed."));
2337 objf
= symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2338 section_addrs
, flags
);
2340 add_target_sections_of_objfile (objf
);
2342 /* Getting new symbols may change our opinion about what is
2344 reinit_frame_cache ();
2345 do_cleanups (my_cleanups
);
2349 /* This function removes a symbol file that was added via add-symbol-file. */
2352 remove_symbol_file_command (char *args
, int from_tty
)
2355 struct objfile
*objf
= NULL
;
2356 struct cleanup
*my_cleanups
;
2357 struct program_space
*pspace
= current_program_space
;
2358 struct gdbarch
*gdbarch
= get_current_arch ();
2363 error (_("remove-symbol-file: no symbol file provided"));
2365 my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2367 argv
= gdb_buildargv (args
);
2369 if (strcmp (argv
[0], "-a") == 0)
2371 /* Interpret the next argument as an address. */
2374 if (argv
[1] == NULL
)
2375 error (_("Missing address argument"));
2377 if (argv
[2] != NULL
)
2378 error (_("Junk after %s"), argv
[1]);
2380 addr
= parse_and_eval_address (argv
[1]);
2385 && objf
->flags
& OBJF_USERLOADED
2386 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2390 else if (argv
[0] != NULL
)
2392 /* Interpret the current argument as a file name. */
2395 if (argv
[1] != NULL
)
2396 error (_("Junk after %s"), argv
[0]);
2398 filename
= tilde_expand (argv
[0]);
2399 make_cleanup (xfree
, filename
);
2404 && objf
->flags
& OBJF_USERLOADED
2405 && objf
->pspace
== pspace
2406 && filename_cmp (filename
, objfile_name (objf
)) == 0)
2412 error (_("No symbol file found"));
2415 && !query (_("Remove symbol table from file \"%s\"? "),
2416 objfile_name (objf
)))
2417 error (_("Not confirmed."));
2419 free_objfile (objf
);
2420 clear_symtab_users (0);
2422 do_cleanups (my_cleanups
);
2425 typedef struct objfile
*objfilep
;
2427 DEF_VEC_P (objfilep
);
2429 /* Re-read symbols if a symbol-file has changed. */
2432 reread_symbols (void)
2434 struct objfile
*objfile
;
2436 struct stat new_statbuf
;
2438 VEC (objfilep
) *new_objfiles
= NULL
;
2439 struct cleanup
*all_cleanups
;
2441 all_cleanups
= make_cleanup (VEC_cleanup (objfilep
), &new_objfiles
);
2443 /* With the addition of shared libraries, this should be modified,
2444 the load time should be saved in the partial symbol tables, since
2445 different tables may come from different source files. FIXME.
2446 This routine should then walk down each partial symbol table
2447 and see if the symbol table that it originates from has been changed. */
2449 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2451 if (objfile
->obfd
== NULL
)
2454 /* Separate debug objfiles are handled in the main objfile. */
2455 if (objfile
->separate_debug_objfile_backlink
)
2458 /* If this object is from an archive (what you usually create with
2459 `ar', often called a `static library' on most systems, though
2460 a `shared library' on AIX is also an archive), then you should
2461 stat on the archive name, not member name. */
2462 if (objfile
->obfd
->my_archive
)
2463 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2465 res
= stat (objfile_name (objfile
), &new_statbuf
);
2468 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2469 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2470 objfile_name (objfile
));
2473 new_modtime
= new_statbuf
.st_mtime
;
2474 if (new_modtime
!= objfile
->mtime
)
2476 struct cleanup
*old_cleanups
;
2477 struct section_offsets
*offsets
;
2479 char *original_name
;
2481 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2482 objfile_name (objfile
));
2484 /* There are various functions like symbol_file_add,
2485 symfile_bfd_open, syms_from_objfile, etc., which might
2486 appear to do what we want. But they have various other
2487 effects which we *don't* want. So we just do stuff
2488 ourselves. We don't worry about mapped files (for one thing,
2489 any mapped file will be out of date). */
2491 /* If we get an error, blow away this objfile (not sure if
2492 that is the correct response for things like shared
2494 old_cleanups
= make_cleanup_free_objfile (objfile
);
2495 /* We need to do this whenever any symbols go away. */
2496 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2498 if (exec_bfd
!= NULL
2499 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2500 bfd_get_filename (exec_bfd
)) == 0)
2502 /* Reload EXEC_BFD without asking anything. */
2504 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2507 /* Keep the calls order approx. the same as in free_objfile. */
2509 /* Free the separate debug objfiles. It will be
2510 automatically recreated by sym_read. */
2511 free_objfile_separate_debug (objfile
);
2513 /* Remove any references to this objfile in the global
2515 preserve_values (objfile
);
2517 /* Nuke all the state that we will re-read. Much of the following
2518 code which sets things to NULL really is necessary to tell
2519 other parts of GDB that there is nothing currently there.
2521 Try to keep the freeing order compatible with free_objfile. */
2523 if (objfile
->sf
!= NULL
)
2525 (*objfile
->sf
->sym_finish
) (objfile
);
2528 clear_objfile_data (objfile
);
2530 /* Clean up any state BFD has sitting around. */
2532 struct bfd
*obfd
= objfile
->obfd
;
2533 char *obfd_filename
;
2535 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2536 /* Open the new BFD before freeing the old one, so that
2537 the filename remains live. */
2538 objfile
->obfd
= gdb_bfd_open_maybe_remote (obfd_filename
);
2539 if (objfile
->obfd
== NULL
)
2541 /* We have to make a cleanup and error here, rather
2542 than erroring later, because once we unref OBFD,
2543 OBFD_FILENAME will be freed. */
2544 make_cleanup_bfd_unref (obfd
);
2545 error (_("Can't open %s to read symbols."), obfd_filename
);
2547 gdb_bfd_unref (obfd
);
2550 original_name
= xstrdup (objfile
->original_name
);
2551 make_cleanup (xfree
, original_name
);
2553 /* bfd_openr sets cacheable to true, which is what we want. */
2554 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2555 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2556 bfd_errmsg (bfd_get_error ()));
2558 /* Save the offsets, we will nuke them with the rest of the
2560 num_offsets
= objfile
->num_sections
;
2561 offsets
= ((struct section_offsets
*)
2562 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2563 memcpy (offsets
, objfile
->section_offsets
,
2564 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2566 /* FIXME: Do we have to free a whole linked list, or is this
2568 if (objfile
->global_psymbols
.list
)
2569 xfree (objfile
->global_psymbols
.list
);
2570 memset (&objfile
->global_psymbols
, 0,
2571 sizeof (objfile
->global_psymbols
));
2572 if (objfile
->static_psymbols
.list
)
2573 xfree (objfile
->static_psymbols
.list
);
2574 memset (&objfile
->static_psymbols
, 0,
2575 sizeof (objfile
->static_psymbols
));
2577 /* Free the obstacks for non-reusable objfiles. */
2578 psymbol_bcache_free (objfile
->psymbol_cache
);
2579 objfile
->psymbol_cache
= psymbol_bcache_init ();
2580 obstack_free (&objfile
->objfile_obstack
, 0);
2581 objfile
->sections
= NULL
;
2582 objfile
->symtabs
= NULL
;
2583 objfile
->psymtabs
= NULL
;
2584 objfile
->psymtabs_addrmap
= NULL
;
2585 objfile
->free_psymtabs
= NULL
;
2586 objfile
->template_symbols
= NULL
;
2587 objfile
->msymbols
= NULL
;
2588 objfile
->minimal_symbol_count
= 0;
2589 memset (&objfile
->msymbol_hash
, 0,
2590 sizeof (objfile
->msymbol_hash
));
2591 memset (&objfile
->msymbol_demangled_hash
, 0,
2592 sizeof (objfile
->msymbol_demangled_hash
));
2594 /* obstack_init also initializes the obstack so it is
2595 empty. We could use obstack_specify_allocation but
2596 gdb_obstack.h specifies the alloc/dealloc functions. */
2597 obstack_init (&objfile
->objfile_obstack
);
2599 /* set_objfile_per_bfd potentially allocates the per-bfd
2600 data on the objfile's obstack (if sharing data across
2601 multiple users is not possible), so it's important to
2602 do it *after* the obstack has been initialized. */
2603 set_objfile_per_bfd (objfile
);
2605 objfile
->original_name
= obstack_copy0 (&objfile
->objfile_obstack
,
2607 strlen (original_name
));
2609 /* Reset the sym_fns pointer. The ELF reader can change it
2610 based on whether .gdb_index is present, and we need it to
2611 start over. PR symtab/15885 */
2612 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2614 build_objfile_section_table (objfile
);
2615 terminate_minimal_symbol_table (objfile
);
2617 /* We use the same section offsets as from last time. I'm not
2618 sure whether that is always correct for shared libraries. */
2619 objfile
->section_offsets
= (struct section_offsets
*)
2620 obstack_alloc (&objfile
->objfile_obstack
,
2621 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2622 memcpy (objfile
->section_offsets
, offsets
,
2623 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2624 objfile
->num_sections
= num_offsets
;
2626 /* What the hell is sym_new_init for, anyway? The concept of
2627 distinguishing between the main file and additional files
2628 in this way seems rather dubious. */
2629 if (objfile
== symfile_objfile
)
2631 (*objfile
->sf
->sym_new_init
) (objfile
);
2634 (*objfile
->sf
->sym_init
) (objfile
);
2635 clear_complaints (&symfile_complaints
, 1, 1);
2637 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2638 read_symbols (objfile
, 0);
2640 if (!objfile_has_symbols (objfile
))
2643 printf_unfiltered (_("(no debugging symbols found)\n"));
2647 /* We're done reading the symbol file; finish off complaints. */
2648 clear_complaints (&symfile_complaints
, 0, 1);
2650 /* Getting new symbols may change our opinion about what is
2653 reinit_frame_cache ();
2655 /* Discard cleanups as symbol reading was successful. */
2656 discard_cleanups (old_cleanups
);
2658 /* If the mtime has changed between the time we set new_modtime
2659 and now, we *want* this to be out of date, so don't call stat
2661 objfile
->mtime
= new_modtime
;
2662 init_entry_point_info (objfile
);
2664 VEC_safe_push (objfilep
, new_objfiles
, objfile
);
2672 /* Notify objfiles that we've modified objfile sections. */
2673 objfiles_changed ();
2675 clear_symtab_users (0);
2677 /* clear_objfile_data for each objfile was called before freeing it and
2678 observer_notify_new_objfile (NULL) has been called by
2679 clear_symtab_users above. Notify the new files now. */
2680 for (ix
= 0; VEC_iterate (objfilep
, new_objfiles
, ix
, objfile
); ix
++)
2681 observer_notify_new_objfile (objfile
);
2683 /* At least one objfile has changed, so we can consider that
2684 the executable we're debugging has changed too. */
2685 observer_notify_executable_changed ();
2688 do_cleanups (all_cleanups
);
2699 static filename_language
*filename_language_table
;
2700 static int fl_table_size
, fl_table_next
;
2703 add_filename_language (char *ext
, enum language lang
)
2705 if (fl_table_next
>= fl_table_size
)
2707 fl_table_size
+= 10;
2708 filename_language_table
=
2709 xrealloc (filename_language_table
,
2710 fl_table_size
* sizeof (*filename_language_table
));
2713 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2714 filename_language_table
[fl_table_next
].lang
= lang
;
2718 static char *ext_args
;
2720 show_ext_args (struct ui_file
*file
, int from_tty
,
2721 struct cmd_list_element
*c
, const char *value
)
2723 fprintf_filtered (file
,
2724 _("Mapping between filename extension "
2725 "and source language is \"%s\".\n"),
2730 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2733 char *cp
= ext_args
;
2736 /* First arg is filename extension, starting with '.' */
2738 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2740 /* Find end of first arg. */
2741 while (*cp
&& !isspace (*cp
))
2745 error (_("'%s': two arguments required -- "
2746 "filename extension and language"),
2749 /* Null-terminate first arg. */
2752 /* Find beginning of second arg, which should be a source language. */
2753 cp
= skip_spaces (cp
);
2756 error (_("'%s': two arguments required -- "
2757 "filename extension and language"),
2760 /* Lookup the language from among those we know. */
2761 lang
= language_enum (cp
);
2763 /* Now lookup the filename extension: do we already know it? */
2764 for (i
= 0; i
< fl_table_next
; i
++)
2765 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2768 if (i
>= fl_table_next
)
2770 /* New file extension. */
2771 add_filename_language (ext_args
, lang
);
2775 /* Redefining a previously known filename extension. */
2778 /* query ("Really make files of type %s '%s'?", */
2779 /* ext_args, language_str (lang)); */
2781 xfree (filename_language_table
[i
].ext
);
2782 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2783 filename_language_table
[i
].lang
= lang
;
2788 info_ext_lang_command (char *args
, int from_tty
)
2792 printf_filtered (_("Filename extensions and the languages they represent:"));
2793 printf_filtered ("\n\n");
2794 for (i
= 0; i
< fl_table_next
; i
++)
2795 printf_filtered ("\t%s\t- %s\n",
2796 filename_language_table
[i
].ext
,
2797 language_str (filename_language_table
[i
].lang
));
2801 init_filename_language_table (void)
2803 if (fl_table_size
== 0) /* Protect against repetition. */
2807 filename_language_table
=
2808 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2809 add_filename_language (".c", language_c
);
2810 add_filename_language (".d", language_d
);
2811 add_filename_language (".C", language_cplus
);
2812 add_filename_language (".cc", language_cplus
);
2813 add_filename_language (".cp", language_cplus
);
2814 add_filename_language (".cpp", language_cplus
);
2815 add_filename_language (".cxx", language_cplus
);
2816 add_filename_language (".c++", language_cplus
);
2817 add_filename_language (".java", language_java
);
2818 add_filename_language (".class", language_java
);
2819 add_filename_language (".m", language_objc
);
2820 add_filename_language (".f", language_fortran
);
2821 add_filename_language (".F", language_fortran
);
2822 add_filename_language (".for", language_fortran
);
2823 add_filename_language (".FOR", language_fortran
);
2824 add_filename_language (".ftn", language_fortran
);
2825 add_filename_language (".FTN", language_fortran
);
2826 add_filename_language (".fpp", language_fortran
);
2827 add_filename_language (".FPP", language_fortran
);
2828 add_filename_language (".f90", language_fortran
);
2829 add_filename_language (".F90", language_fortran
);
2830 add_filename_language (".f95", language_fortran
);
2831 add_filename_language (".F95", language_fortran
);
2832 add_filename_language (".f03", language_fortran
);
2833 add_filename_language (".F03", language_fortran
);
2834 add_filename_language (".f08", language_fortran
);
2835 add_filename_language (".F08", language_fortran
);
2836 add_filename_language (".s", language_asm
);
2837 add_filename_language (".sx", language_asm
);
2838 add_filename_language (".S", language_asm
);
2839 add_filename_language (".pas", language_pascal
);
2840 add_filename_language (".p", language_pascal
);
2841 add_filename_language (".pp", language_pascal
);
2842 add_filename_language (".adb", language_ada
);
2843 add_filename_language (".ads", language_ada
);
2844 add_filename_language (".a", language_ada
);
2845 add_filename_language (".ada", language_ada
);
2846 add_filename_language (".dg", language_ada
);
2851 deduce_language_from_filename (const char *filename
)
2856 if (filename
!= NULL
)
2857 if ((cp
= strrchr (filename
, '.')) != NULL
)
2858 for (i
= 0; i
< fl_table_next
; i
++)
2859 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2860 return filename_language_table
[i
].lang
;
2862 return language_unknown
;
2867 Allocate and partly initialize a new symbol table. Return a pointer
2868 to it. error() if no space.
2870 Caller must set these fields:
2879 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2881 struct symtab
*symtab
;
2883 symtab
= (struct symtab
*)
2884 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2885 memset (symtab
, 0, sizeof (*symtab
));
2886 symtab
->filename
= bcache (filename
, strlen (filename
) + 1,
2887 objfile
->per_bfd
->filename_cache
);
2888 symtab
->fullname
= NULL
;
2889 symtab
->language
= deduce_language_from_filename (filename
);
2890 symtab
->debugformat
= "unknown";
2892 /* Hook it to the objfile it comes from. */
2894 symtab
->objfile
= objfile
;
2895 symtab
->next
= objfile
->symtabs
;
2896 objfile
->symtabs
= symtab
;
2898 /* This can be very verbose with lots of headers.
2899 Only print at higher debug levels. */
2900 if (symtab_create_debug
>= 2)
2902 /* Be a bit clever with debugging messages, and don't print objfile
2903 every time, only when it changes. */
2904 static char *last_objfile_name
= NULL
;
2906 if (last_objfile_name
== NULL
2907 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2909 xfree (last_objfile_name
);
2910 last_objfile_name
= xstrdup (objfile_name (objfile
));
2911 fprintf_unfiltered (gdb_stdlog
,
2912 "Creating one or more symtabs for objfile %s ...\n",
2915 fprintf_unfiltered (gdb_stdlog
,
2916 "Created symtab %s for module %s.\n",
2917 host_address_to_string (symtab
), filename
);
2924 /* Reset all data structures in gdb which may contain references to symbol
2925 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2928 clear_symtab_users (int add_flags
)
2930 /* Someday, we should do better than this, by only blowing away
2931 the things that really need to be blown. */
2933 /* Clear the "current" symtab first, because it is no longer valid.
2934 breakpoint_re_set may try to access the current symtab. */
2935 clear_current_source_symtab_and_line ();
2938 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2939 breakpoint_re_set ();
2940 clear_last_displayed_sal ();
2941 clear_pc_function_cache ();
2942 observer_notify_new_objfile (NULL
);
2944 /* Clear globals which might have pointed into a removed objfile.
2945 FIXME: It's not clear which of these are supposed to persist
2946 between expressions and which ought to be reset each time. */
2947 expression_context_block
= NULL
;
2948 innermost_block
= NULL
;
2950 /* Varobj may refer to old symbols, perform a cleanup. */
2951 varobj_invalidate ();
2956 clear_symtab_users_cleanup (void *ignore
)
2958 clear_symtab_users (0);
2962 The following code implements an abstraction for debugging overlay sections.
2964 The target model is as follows:
2965 1) The gnu linker will permit multiple sections to be mapped into the
2966 same VMA, each with its own unique LMA (or load address).
2967 2) It is assumed that some runtime mechanism exists for mapping the
2968 sections, one by one, from the load address into the VMA address.
2969 3) This code provides a mechanism for gdb to keep track of which
2970 sections should be considered to be mapped from the VMA to the LMA.
2971 This information is used for symbol lookup, and memory read/write.
2972 For instance, if a section has been mapped then its contents
2973 should be read from the VMA, otherwise from the LMA.
2975 Two levels of debugger support for overlays are available. One is
2976 "manual", in which the debugger relies on the user to tell it which
2977 overlays are currently mapped. This level of support is
2978 implemented entirely in the core debugger, and the information about
2979 whether a section is mapped is kept in the objfile->obj_section table.
2981 The second level of support is "automatic", and is only available if
2982 the target-specific code provides functionality to read the target's
2983 overlay mapping table, and translate its contents for the debugger
2984 (by updating the mapped state information in the obj_section tables).
2986 The interface is as follows:
2988 overlay map <name> -- tell gdb to consider this section mapped
2989 overlay unmap <name> -- tell gdb to consider this section unmapped
2990 overlay list -- list the sections that GDB thinks are mapped
2991 overlay read-target -- get the target's state of what's mapped
2992 overlay off/manual/auto -- set overlay debugging state
2993 Functional interface:
2994 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2995 section, return that section.
2996 find_pc_overlay(pc): find any overlay section that contains
2997 the pc, either in its VMA or its LMA
2998 section_is_mapped(sect): true if overlay is marked as mapped
2999 section_is_overlay(sect): true if section's VMA != LMA
3000 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3001 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3002 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3003 overlay_mapped_address(...): map an address from section's LMA to VMA
3004 overlay_unmapped_address(...): map an address from section's VMA to LMA
3005 symbol_overlayed_address(...): Return a "current" address for symbol:
3006 either in VMA or LMA depending on whether
3007 the symbol's section is currently mapped. */
3009 /* Overlay debugging state: */
3011 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3012 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
3014 /* Function: section_is_overlay (SECTION)
3015 Returns true if SECTION has VMA not equal to LMA, ie.
3016 SECTION is loaded at an address different from where it will "run". */
3019 section_is_overlay (struct obj_section
*section
)
3021 if (overlay_debugging
&& section
)
3023 bfd
*abfd
= section
->objfile
->obfd
;
3024 asection
*bfd_section
= section
->the_bfd_section
;
3026 if (bfd_section_lma (abfd
, bfd_section
) != 0
3027 && bfd_section_lma (abfd
, bfd_section
)
3028 != bfd_section_vma (abfd
, bfd_section
))
3035 /* Function: overlay_invalidate_all (void)
3036 Invalidate the mapped state of all overlay sections (mark it as stale). */
3039 overlay_invalidate_all (void)
3041 struct objfile
*objfile
;
3042 struct obj_section
*sect
;
3044 ALL_OBJSECTIONS (objfile
, sect
)
3045 if (section_is_overlay (sect
))
3046 sect
->ovly_mapped
= -1;
3049 /* Function: section_is_mapped (SECTION)
3050 Returns true if section is an overlay, and is currently mapped.
3052 Access to the ovly_mapped flag is restricted to this function, so
3053 that we can do automatic update. If the global flag
3054 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3055 overlay_invalidate_all. If the mapped state of the particular
3056 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3059 section_is_mapped (struct obj_section
*osect
)
3061 struct gdbarch
*gdbarch
;
3063 if (osect
== 0 || !section_is_overlay (osect
))
3066 switch (overlay_debugging
)
3070 return 0; /* overlay debugging off */
3071 case ovly_auto
: /* overlay debugging automatic */
3072 /* Unles there is a gdbarch_overlay_update function,
3073 there's really nothing useful to do here (can't really go auto). */
3074 gdbarch
= get_objfile_arch (osect
->objfile
);
3075 if (gdbarch_overlay_update_p (gdbarch
))
3077 if (overlay_cache_invalid
)
3079 overlay_invalidate_all ();
3080 overlay_cache_invalid
= 0;
3082 if (osect
->ovly_mapped
== -1)
3083 gdbarch_overlay_update (gdbarch
, osect
);
3085 /* fall thru to manual case */
3086 case ovly_on
: /* overlay debugging manual */
3087 return osect
->ovly_mapped
== 1;
3091 /* Function: pc_in_unmapped_range
3092 If PC falls into the lma range of SECTION, return true, else false. */
3095 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3097 if (section_is_overlay (section
))
3099 bfd
*abfd
= section
->objfile
->obfd
;
3100 asection
*bfd_section
= section
->the_bfd_section
;
3102 /* We assume the LMA is relocated by the same offset as the VMA. */
3103 bfd_vma size
= bfd_get_section_size (bfd_section
);
3104 CORE_ADDR offset
= obj_section_offset (section
);
3106 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3107 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3114 /* Function: pc_in_mapped_range
3115 If PC falls into the vma range of SECTION, return true, else false. */
3118 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3120 if (section_is_overlay (section
))
3122 if (obj_section_addr (section
) <= pc
3123 && pc
< obj_section_endaddr (section
))
3130 /* Return true if the mapped ranges of sections A and B overlap, false
3134 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3136 CORE_ADDR a_start
= obj_section_addr (a
);
3137 CORE_ADDR a_end
= obj_section_endaddr (a
);
3138 CORE_ADDR b_start
= obj_section_addr (b
);
3139 CORE_ADDR b_end
= obj_section_endaddr (b
);
3141 return (a_start
< b_end
&& b_start
< a_end
);
3144 /* Function: overlay_unmapped_address (PC, SECTION)
3145 Returns the address corresponding to PC in the unmapped (load) range.
3146 May be the same as PC. */
3149 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3151 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3153 bfd
*abfd
= section
->objfile
->obfd
;
3154 asection
*bfd_section
= section
->the_bfd_section
;
3156 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3157 - bfd_section_vma (abfd
, bfd_section
);
3163 /* Function: overlay_mapped_address (PC, SECTION)
3164 Returns the address corresponding to PC in the mapped (runtime) range.
3165 May be the same as PC. */
3168 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3170 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3172 bfd
*abfd
= section
->objfile
->obfd
;
3173 asection
*bfd_section
= section
->the_bfd_section
;
3175 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3176 - bfd_section_lma (abfd
, bfd_section
);
3182 /* Function: symbol_overlayed_address
3183 Return one of two addresses (relative to the VMA or to the LMA),
3184 depending on whether the section is mapped or not. */
3187 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3189 if (overlay_debugging
)
3191 /* If the symbol has no section, just return its regular address. */
3194 /* If the symbol's section is not an overlay, just return its
3196 if (!section_is_overlay (section
))
3198 /* If the symbol's section is mapped, just return its address. */
3199 if (section_is_mapped (section
))
3202 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3203 * then return its LOADED address rather than its vma address!!
3205 return overlay_unmapped_address (address
, section
);
3210 /* Function: find_pc_overlay (PC)
3211 Return the best-match overlay section for PC:
3212 If PC matches a mapped overlay section's VMA, return that section.
3213 Else if PC matches an unmapped section's VMA, return that section.
3214 Else if PC matches an unmapped section's LMA, return that section. */
3216 struct obj_section
*
3217 find_pc_overlay (CORE_ADDR pc
)
3219 struct objfile
*objfile
;
3220 struct obj_section
*osect
, *best_match
= NULL
;
3222 if (overlay_debugging
)
3223 ALL_OBJSECTIONS (objfile
, osect
)
3224 if (section_is_overlay (osect
))
3226 if (pc_in_mapped_range (pc
, osect
))
3228 if (section_is_mapped (osect
))
3233 else if (pc_in_unmapped_range (pc
, osect
))
3239 /* Function: find_pc_mapped_section (PC)
3240 If PC falls into the VMA address range of an overlay section that is
3241 currently marked as MAPPED, return that section. Else return NULL. */
3243 struct obj_section
*
3244 find_pc_mapped_section (CORE_ADDR pc
)
3246 struct objfile
*objfile
;
3247 struct obj_section
*osect
;
3249 if (overlay_debugging
)
3250 ALL_OBJSECTIONS (objfile
, osect
)
3251 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3257 /* Function: list_overlays_command
3258 Print a list of mapped sections and their PC ranges. */
3261 list_overlays_command (char *args
, int from_tty
)
3264 struct objfile
*objfile
;
3265 struct obj_section
*osect
;
3267 if (overlay_debugging
)
3268 ALL_OBJSECTIONS (objfile
, osect
)
3269 if (section_is_mapped (osect
))
3271 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3276 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3277 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3278 size
= bfd_get_section_size (osect
->the_bfd_section
);
3279 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3281 printf_filtered ("Section %s, loaded at ", name
);
3282 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3283 puts_filtered (" - ");
3284 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3285 printf_filtered (", mapped at ");
3286 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3287 puts_filtered (" - ");
3288 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3289 puts_filtered ("\n");
3294 printf_filtered (_("No sections are mapped.\n"));
3297 /* Function: map_overlay_command
3298 Mark the named section as mapped (ie. residing at its VMA address). */
3301 map_overlay_command (char *args
, int from_tty
)
3303 struct objfile
*objfile
, *objfile2
;
3304 struct obj_section
*sec
, *sec2
;
3306 if (!overlay_debugging
)
3307 error (_("Overlay debugging not enabled. Use "
3308 "either the 'overlay auto' or\n"
3309 "the 'overlay manual' command."));
3311 if (args
== 0 || *args
== 0)
3312 error (_("Argument required: name of an overlay section"));
3314 /* First, find a section matching the user supplied argument. */
3315 ALL_OBJSECTIONS (objfile
, sec
)
3316 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3318 /* Now, check to see if the section is an overlay. */
3319 if (!section_is_overlay (sec
))
3320 continue; /* not an overlay section */
3322 /* Mark the overlay as "mapped". */
3323 sec
->ovly_mapped
= 1;
3325 /* Next, make a pass and unmap any sections that are
3326 overlapped by this new section: */
3327 ALL_OBJSECTIONS (objfile2
, sec2
)
3328 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3331 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3332 bfd_section_name (objfile
->obfd
,
3333 sec2
->the_bfd_section
));
3334 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3338 error (_("No overlay section called %s"), args
);
3341 /* Function: unmap_overlay_command
3342 Mark the overlay section as unmapped
3343 (ie. resident in its LMA address range, rather than the VMA range). */
3346 unmap_overlay_command (char *args
, int from_tty
)
3348 struct objfile
*objfile
;
3349 struct obj_section
*sec
;
3351 if (!overlay_debugging
)
3352 error (_("Overlay debugging not enabled. "
3353 "Use either the 'overlay auto' or\n"
3354 "the 'overlay manual' command."));
3356 if (args
== 0 || *args
== 0)
3357 error (_("Argument required: name of an overlay section"));
3359 /* First, find a section matching the user supplied argument. */
3360 ALL_OBJSECTIONS (objfile
, sec
)
3361 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3363 if (!sec
->ovly_mapped
)
3364 error (_("Section %s is not mapped"), args
);
3365 sec
->ovly_mapped
= 0;
3368 error (_("No overlay section called %s"), args
);
3371 /* Function: overlay_auto_command
3372 A utility command to turn on overlay debugging.
3373 Possibly this should be done via a set/show command. */
3376 overlay_auto_command (char *args
, int from_tty
)
3378 overlay_debugging
= ovly_auto
;
3379 enable_overlay_breakpoints ();
3381 printf_unfiltered (_("Automatic overlay debugging enabled."));
3384 /* Function: overlay_manual_command
3385 A utility command to turn on overlay debugging.
3386 Possibly this should be done via a set/show command. */
3389 overlay_manual_command (char *args
, int from_tty
)
3391 overlay_debugging
= ovly_on
;
3392 disable_overlay_breakpoints ();
3394 printf_unfiltered (_("Overlay debugging enabled."));
3397 /* Function: overlay_off_command
3398 A utility command to turn on overlay debugging.
3399 Possibly this should be done via a set/show command. */
3402 overlay_off_command (char *args
, int from_tty
)
3404 overlay_debugging
= ovly_off
;
3405 disable_overlay_breakpoints ();
3407 printf_unfiltered (_("Overlay debugging disabled."));
3411 overlay_load_command (char *args
, int from_tty
)
3413 struct gdbarch
*gdbarch
= get_current_arch ();
3415 if (gdbarch_overlay_update_p (gdbarch
))
3416 gdbarch_overlay_update (gdbarch
, NULL
);
3418 error (_("This target does not know how to read its overlay state."));
3421 /* Function: overlay_command
3422 A place-holder for a mis-typed command. */
3424 /* Command list chain containing all defined "overlay" subcommands. */
3425 static struct cmd_list_element
*overlaylist
;
3428 overlay_command (char *args
, int from_tty
)
3431 ("\"overlay\" must be followed by the name of an overlay command.\n");
3432 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3435 /* Target Overlays for the "Simplest" overlay manager:
3437 This is GDB's default target overlay layer. It works with the
3438 minimal overlay manager supplied as an example by Cygnus. The
3439 entry point is via a function pointer "gdbarch_overlay_update",
3440 so targets that use a different runtime overlay manager can
3441 substitute their own overlay_update function and take over the
3444 The overlay_update function pokes around in the target's data structures
3445 to see what overlays are mapped, and updates GDB's overlay mapping with
3448 In this simple implementation, the target data structures are as follows:
3449 unsigned _novlys; /# number of overlay sections #/
3450 unsigned _ovly_table[_novlys][4] = {
3451 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3452 {..., ..., ..., ...},
3454 unsigned _novly_regions; /# number of overlay regions #/
3455 unsigned _ovly_region_table[_novly_regions][3] = {
3456 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3459 These functions will attempt to update GDB's mappedness state in the
3460 symbol section table, based on the target's mappedness state.
3462 To do this, we keep a cached copy of the target's _ovly_table, and
3463 attempt to detect when the cached copy is invalidated. The main
3464 entry point is "simple_overlay_update(SECT), which looks up SECT in
3465 the cached table and re-reads only the entry for that section from
3466 the target (whenever possible). */
3468 /* Cached, dynamically allocated copies of the target data structures: */
3469 static unsigned (*cache_ovly_table
)[4] = 0;
3470 static unsigned cache_novlys
= 0;
3471 static CORE_ADDR cache_ovly_table_base
= 0;
3474 VMA
, SIZE
, LMA
, MAPPED
3477 /* Throw away the cached copy of _ovly_table. */
3480 simple_free_overlay_table (void)
3482 if (cache_ovly_table
)
3483 xfree (cache_ovly_table
);
3485 cache_ovly_table
= NULL
;
3486 cache_ovly_table_base
= 0;
3489 /* Read an array of ints of size SIZE from the target into a local buffer.
3490 Convert to host order. int LEN is number of ints. */
3493 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3494 int len
, int size
, enum bfd_endian byte_order
)
3496 /* FIXME (alloca): Not safe if array is very large. */
3497 gdb_byte
*buf
= alloca (len
* size
);
3500 read_memory (memaddr
, buf
, len
* size
);
3501 for (i
= 0; i
< len
; i
++)
3502 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3505 /* Find and grab a copy of the target _ovly_table
3506 (and _novlys, which is needed for the table's size). */
3509 simple_read_overlay_table (void)
3511 struct minimal_symbol
*novlys_msym
;
3512 struct bound_minimal_symbol ovly_table_msym
;
3513 struct gdbarch
*gdbarch
;
3515 enum bfd_endian byte_order
;
3517 simple_free_overlay_table ();
3518 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3521 error (_("Error reading inferior's overlay table: "
3522 "couldn't find `_novlys' variable\n"
3523 "in inferior. Use `overlay manual' mode."));
3527 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3528 if (! ovly_table_msym
.minsym
)
3530 error (_("Error reading inferior's overlay table: couldn't find "
3531 "`_ovly_table' array\n"
3532 "in inferior. Use `overlay manual' mode."));
3536 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3537 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3538 byte_order
= gdbarch_byte_order (gdbarch
);
3540 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3543 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3544 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
.minsym
);
3545 read_target_long_array (cache_ovly_table_base
,
3546 (unsigned int *) cache_ovly_table
,
3547 cache_novlys
* 4, word_size
, byte_order
);
3549 return 1; /* SUCCESS */
3552 /* Function: simple_overlay_update_1
3553 A helper function for simple_overlay_update. Assuming a cached copy
3554 of _ovly_table exists, look through it to find an entry whose vma,
3555 lma and size match those of OSECT. Re-read the entry and make sure
3556 it still matches OSECT (else the table may no longer be valid).
3557 Set OSECT's mapped state to match the entry. Return: 1 for
3558 success, 0 for failure. */
3561 simple_overlay_update_1 (struct obj_section
*osect
)
3564 bfd
*obfd
= osect
->objfile
->obfd
;
3565 asection
*bsect
= osect
->the_bfd_section
;
3566 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3567 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3568 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3570 size
= bfd_get_section_size (osect
->the_bfd_section
);
3571 for (i
= 0; i
< cache_novlys
; i
++)
3572 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3573 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3574 /* && cache_ovly_table[i][SIZE] == size */ )
3576 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3577 (unsigned int *) cache_ovly_table
[i
],
3578 4, word_size
, byte_order
);
3579 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3580 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3581 /* && cache_ovly_table[i][SIZE] == size */ )
3583 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3586 else /* Warning! Warning! Target's ovly table has changed! */
3592 /* Function: simple_overlay_update
3593 If OSECT is NULL, then update all sections' mapped state
3594 (after re-reading the entire target _ovly_table).
3595 If OSECT is non-NULL, then try to find a matching entry in the
3596 cached ovly_table and update only OSECT's mapped state.
3597 If a cached entry can't be found or the cache isn't valid, then
3598 re-read the entire cache, and go ahead and update all sections. */
3601 simple_overlay_update (struct obj_section
*osect
)
3603 struct objfile
*objfile
;
3605 /* Were we given an osect to look up? NULL means do all of them. */
3607 /* Have we got a cached copy of the target's overlay table? */
3608 if (cache_ovly_table
!= NULL
)
3610 /* Does its cached location match what's currently in the
3612 struct minimal_symbol
*minsym
3613 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3616 error (_("Error reading inferior's overlay table: couldn't "
3617 "find `_ovly_table' array\n"
3618 "in inferior. Use `overlay manual' mode."));
3620 if (cache_ovly_table_base
== SYMBOL_VALUE_ADDRESS (minsym
))
3621 /* Then go ahead and try to look up this single section in
3623 if (simple_overlay_update_1 (osect
))
3624 /* Found it! We're done. */
3628 /* Cached table no good: need to read the entire table anew.
3629 Or else we want all the sections, in which case it's actually
3630 more efficient to read the whole table in one block anyway. */
3632 if (! simple_read_overlay_table ())
3635 /* Now may as well update all sections, even if only one was requested. */
3636 ALL_OBJSECTIONS (objfile
, osect
)
3637 if (section_is_overlay (osect
))
3640 bfd
*obfd
= osect
->objfile
->obfd
;
3641 asection
*bsect
= osect
->the_bfd_section
;
3643 size
= bfd_get_section_size (bsect
);
3644 for (i
= 0; i
< cache_novlys
; i
++)
3645 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3646 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3647 /* && cache_ovly_table[i][SIZE] == size */ )
3648 { /* obj_section matches i'th entry in ovly_table. */
3649 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3650 break; /* finished with inner for loop: break out. */
3655 /* Set the output sections and output offsets for section SECTP in
3656 ABFD. The relocation code in BFD will read these offsets, so we
3657 need to be sure they're initialized. We map each section to itself,
3658 with no offset; this means that SECTP->vma will be honored. */
3661 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3663 sectp
->output_section
= sectp
;
3664 sectp
->output_offset
= 0;
3667 /* Default implementation for sym_relocate. */
3670 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3673 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3675 bfd
*abfd
= sectp
->owner
;
3677 /* We're only interested in sections with relocation
3679 if ((sectp
->flags
& SEC_RELOC
) == 0)
3682 /* We will handle section offsets properly elsewhere, so relocate as if
3683 all sections begin at 0. */
3684 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3686 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3689 /* Relocate the contents of a debug section SECTP in ABFD. The
3690 contents are stored in BUF if it is non-NULL, or returned in a
3691 malloc'd buffer otherwise.
3693 For some platforms and debug info formats, shared libraries contain
3694 relocations against the debug sections (particularly for DWARF-2;
3695 one affected platform is PowerPC GNU/Linux, although it depends on
3696 the version of the linker in use). Also, ELF object files naturally
3697 have unresolved relocations for their debug sections. We need to apply
3698 the relocations in order to get the locations of symbols correct.
3699 Another example that may require relocation processing, is the
3700 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3704 symfile_relocate_debug_section (struct objfile
*objfile
,
3705 asection
*sectp
, bfd_byte
*buf
)
3707 gdb_assert (objfile
->sf
->sym_relocate
);
3709 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3712 struct symfile_segment_data
*
3713 get_symfile_segment_data (bfd
*abfd
)
3715 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3720 return sf
->sym_segments (abfd
);
3724 free_symfile_segment_data (struct symfile_segment_data
*data
)
3726 xfree (data
->segment_bases
);
3727 xfree (data
->segment_sizes
);
3728 xfree (data
->segment_info
);
3733 - DATA, containing segment addresses from the object file ABFD, and
3734 the mapping from ABFD's sections onto the segments that own them,
3736 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3737 segment addresses reported by the target,
3738 store the appropriate offsets for each section in OFFSETS.
3740 If there are fewer entries in SEGMENT_BASES than there are segments
3741 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3743 If there are more entries, then ignore the extra. The target may
3744 not be able to distinguish between an empty data segment and a
3745 missing data segment; a missing text segment is less plausible. */
3748 symfile_map_offsets_to_segments (bfd
*abfd
,
3749 const struct symfile_segment_data
*data
,
3750 struct section_offsets
*offsets
,
3751 int num_segment_bases
,
3752 const CORE_ADDR
*segment_bases
)
3757 /* It doesn't make sense to call this function unless you have some
3758 segment base addresses. */
3759 gdb_assert (num_segment_bases
> 0);
3761 /* If we do not have segment mappings for the object file, we
3762 can not relocate it by segments. */
3763 gdb_assert (data
!= NULL
);
3764 gdb_assert (data
->num_segments
> 0);
3766 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3768 int which
= data
->segment_info
[i
];
3770 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3772 /* Don't bother computing offsets for sections that aren't
3773 loaded as part of any segment. */
3777 /* Use the last SEGMENT_BASES entry as the address of any extra
3778 segments mentioned in DATA->segment_info. */
3779 if (which
> num_segment_bases
)
3780 which
= num_segment_bases
;
3782 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3783 - data
->segment_bases
[which
- 1]);
3790 symfile_find_segment_sections (struct objfile
*objfile
)
3792 bfd
*abfd
= objfile
->obfd
;
3795 struct symfile_segment_data
*data
;
3797 data
= get_symfile_segment_data (objfile
->obfd
);
3801 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3803 free_symfile_segment_data (data
);
3807 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3809 int which
= data
->segment_info
[i
];
3813 if (objfile
->sect_index_text
== -1)
3814 objfile
->sect_index_text
= sect
->index
;
3816 if (objfile
->sect_index_rodata
== -1)
3817 objfile
->sect_index_rodata
= sect
->index
;
3819 else if (which
== 2)
3821 if (objfile
->sect_index_data
== -1)
3822 objfile
->sect_index_data
= sect
->index
;
3824 if (objfile
->sect_index_bss
== -1)
3825 objfile
->sect_index_bss
= sect
->index
;
3829 free_symfile_segment_data (data
);
3832 /* Listen for free_objfile events. */
3835 symfile_free_objfile (struct objfile
*objfile
)
3837 /* Remove the target sections of user-added objfiles. */
3838 if (objfile
!= 0 && objfile
->flags
& OBJF_USERLOADED
)
3839 remove_target_sections ((void *) objfile
);
3843 _initialize_symfile (void)
3845 struct cmd_list_element
*c
;
3847 observer_attach_free_objfile (symfile_free_objfile
);
3849 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3850 Load symbol table from executable file FILE.\n\
3851 The `file' command can also load symbol tables, as well as setting the file\n\
3852 to execute."), &cmdlist
);
3853 set_cmd_completer (c
, filename_completer
);
3855 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3856 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3857 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3858 ...]\nADDR is the starting address of the file's text.\n\
3859 The optional arguments are section-name section-address pairs and\n\
3860 should be specified if the data and bss segments are not contiguous\n\
3861 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3863 set_cmd_completer (c
, filename_completer
);
3865 c
= add_cmd ("remove-symbol-file", class_files
,
3866 remove_symbol_file_command
, _("\
3867 Remove a symbol file added via the add-symbol-file command.\n\
3868 Usage: remove-symbol-file FILENAME\n\
3869 remove-symbol-file -a ADDRESS\n\
3870 The file to remove can be identified by its filename or by an address\n\
3871 that lies within the boundaries of this symbol file in memory."),
3874 c
= add_cmd ("load", class_files
, load_command
, _("\
3875 Dynamically load FILE into the running program, and record its symbols\n\
3876 for access from GDB.\n\
3877 A load OFFSET may also be given."), &cmdlist
);
3878 set_cmd_completer (c
, filename_completer
);
3880 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3881 _("Commands for debugging overlays."), &overlaylist
,
3882 "overlay ", 0, &cmdlist
);
3884 add_com_alias ("ovly", "overlay", class_alias
, 1);
3885 add_com_alias ("ov", "overlay", class_alias
, 1);
3887 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3888 _("Assert that an overlay section is mapped."), &overlaylist
);
3890 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3891 _("Assert that an overlay section is unmapped."), &overlaylist
);
3893 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3894 _("List mappings of overlay sections."), &overlaylist
);
3896 add_cmd ("manual", class_support
, overlay_manual_command
,
3897 _("Enable overlay debugging."), &overlaylist
);
3898 add_cmd ("off", class_support
, overlay_off_command
,
3899 _("Disable overlay debugging."), &overlaylist
);
3900 add_cmd ("auto", class_support
, overlay_auto_command
,
3901 _("Enable automatic overlay debugging."), &overlaylist
);
3902 add_cmd ("load-target", class_support
, overlay_load_command
,
3903 _("Read the overlay mapping state from the target."), &overlaylist
);
3905 /* Filename extension to source language lookup table: */
3906 init_filename_language_table ();
3907 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3909 Set mapping between filename extension and source language."), _("\
3910 Show mapping between filename extension and source language."), _("\
3911 Usage: set extension-language .foo bar"),
3912 set_ext_lang_command
,
3914 &setlist
, &showlist
);
3916 add_info ("extensions", info_ext_lang_command
,
3917 _("All filename extensions associated with a source language."));
3919 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3920 &debug_file_directory
, _("\
3921 Set the directories where separate debug symbols are searched for."), _("\
3922 Show the directories where separate debug symbols are searched for."), _("\
3923 Separate debug symbols are first searched for in the same\n\
3924 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3925 and lastly at the path of the directory of the binary with\n\
3926 each global debug-file-directory component prepended."),
3928 show_debug_file_directory
,
3929 &setlist
, &showlist
);