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"
61 #include <sys/types.h>
71 int (*deprecated_ui_load_progress_hook
) (const char *section
,
73 void (*deprecated_show_load_progress
) (const char *section
,
74 unsigned long section_sent
,
75 unsigned long section_size
,
76 unsigned long total_sent
,
77 unsigned long total_size
);
78 void (*deprecated_pre_add_symbol_hook
) (const char *);
79 void (*deprecated_post_add_symbol_hook
) (void);
81 static void clear_symtab_users_cleanup (void *ignore
);
83 /* Global variables owned by this file. */
84 int readnow_symbol_files
; /* Read full symbols immediately. */
86 /* Functions this file defines. */
88 static void load_command (char *, int);
90 static void symbol_file_add_main_1 (const char *args
, int from_tty
, int flags
);
92 static void add_symbol_file_command (char *, int);
94 static const struct sym_fns
*find_sym_fns (bfd
*);
96 static void decrement_reading_symtab (void *);
98 static void overlay_invalidate_all (void);
100 static void overlay_auto_command (char *, int);
102 static void overlay_manual_command (char *, int);
104 static void overlay_off_command (char *, int);
106 static void overlay_load_command (char *, int);
108 static void overlay_command (char *, int);
110 static void simple_free_overlay_table (void);
112 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
115 static int simple_read_overlay_table (void);
117 static int simple_overlay_update_1 (struct obj_section
*);
119 static void add_filename_language (char *ext
, enum language lang
);
121 static void info_ext_lang_command (char *args
, int from_tty
);
123 static void init_filename_language_table (void);
125 static void symfile_find_segment_sections (struct objfile
*objfile
);
127 void _initialize_symfile (void);
129 /* List of all available sym_fns. On gdb startup, each object file reader
130 calls add_symtab_fns() to register information on each format it is
135 /* BFD flavour that we handle. */
136 enum bfd_flavour sym_flavour
;
138 /* The "vtable" of symbol functions. */
139 const struct sym_fns
*sym_fns
;
140 } registered_sym_fns
;
142 DEF_VEC_O (registered_sym_fns
);
144 static VEC (registered_sym_fns
) *symtab_fns
= NULL
;
146 /* If non-zero, shared library symbols will be added automatically
147 when the inferior is created, new libraries are loaded, or when
148 attaching to the inferior. This is almost always what users will
149 want to have happen; but for very large programs, the startup time
150 will be excessive, and so if this is a problem, the user can clear
151 this flag and then add the shared library symbols as needed. Note
152 that there is a potential for confusion, since if the shared
153 library symbols are not loaded, commands like "info fun" will *not*
154 report all the functions that are actually present. */
156 int auto_solib_add
= 1;
159 /* True if we are reading a symbol table. */
161 int currently_reading_symtab
= 0;
164 decrement_reading_symtab (void *dummy
)
166 currently_reading_symtab
--;
167 gdb_assert (currently_reading_symtab
>= 0);
170 /* Increment currently_reading_symtab and return a cleanup that can be
171 used to decrement it. */
174 increment_reading_symtab (void)
176 ++currently_reading_symtab
;
177 gdb_assert (currently_reading_symtab
> 0);
178 return make_cleanup (decrement_reading_symtab
, NULL
);
181 /* Remember the lowest-addressed loadable section we've seen.
182 This function is called via bfd_map_over_sections.
184 In case of equal vmas, the section with the largest size becomes the
185 lowest-addressed loadable section.
187 If the vmas and sizes are equal, the last section is considered the
188 lowest-addressed loadable section. */
191 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
193 asection
**lowest
= (asection
**) obj
;
195 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
198 *lowest
= sect
; /* First loadable section */
199 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
200 *lowest
= sect
; /* A lower loadable section */
201 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
202 && (bfd_section_size (abfd
, (*lowest
))
203 <= bfd_section_size (abfd
, sect
)))
207 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
208 new object's 'num_sections' field is set to 0; it must be updated
211 struct section_addr_info
*
212 alloc_section_addr_info (size_t num_sections
)
214 struct section_addr_info
*sap
;
217 size
= (sizeof (struct section_addr_info
)
218 + sizeof (struct other_sections
) * (num_sections
- 1));
219 sap
= (struct section_addr_info
*) xmalloc (size
);
220 memset (sap
, 0, size
);
225 /* Build (allocate and populate) a section_addr_info struct from
226 an existing section table. */
228 extern struct section_addr_info
*
229 build_section_addr_info_from_section_table (const struct target_section
*start
,
230 const struct target_section
*end
)
232 struct section_addr_info
*sap
;
233 const struct target_section
*stp
;
236 sap
= alloc_section_addr_info (end
- start
);
238 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
240 struct bfd_section
*asect
= stp
->the_bfd_section
;
241 bfd
*abfd
= asect
->owner
;
243 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
244 && oidx
< end
- start
)
246 sap
->other
[oidx
].addr
= stp
->addr
;
247 sap
->other
[oidx
].name
= xstrdup (bfd_section_name (abfd
, asect
));
248 sap
->other
[oidx
].sectindex
= gdb_bfd_section_index (abfd
, asect
);
253 sap
->num_sections
= oidx
;
258 /* Create a section_addr_info from section offsets in ABFD. */
260 static struct section_addr_info
*
261 build_section_addr_info_from_bfd (bfd
*abfd
)
263 struct section_addr_info
*sap
;
265 struct bfd_section
*sec
;
267 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
268 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
269 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
271 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
272 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
273 sap
->other
[i
].sectindex
= gdb_bfd_section_index (abfd
, sec
);
277 sap
->num_sections
= i
;
282 /* Create a section_addr_info from section offsets in OBJFILE. */
284 struct section_addr_info
*
285 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
287 struct section_addr_info
*sap
;
290 /* Before reread_symbols gets rewritten it is not safe to call:
291 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
293 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
294 for (i
= 0; i
< sap
->num_sections
; i
++)
296 int sectindex
= sap
->other
[i
].sectindex
;
298 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
303 /* Free all memory allocated by build_section_addr_info_from_section_table. */
306 free_section_addr_info (struct section_addr_info
*sap
)
310 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
311 xfree (sap
->other
[idx
].name
);
315 /* Initialize OBJFILE's sect_index_* members. */
318 init_objfile_sect_indices (struct objfile
*objfile
)
323 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
325 objfile
->sect_index_text
= sect
->index
;
327 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
329 objfile
->sect_index_data
= sect
->index
;
331 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
333 objfile
->sect_index_bss
= sect
->index
;
335 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
337 objfile
->sect_index_rodata
= sect
->index
;
339 /* This is where things get really weird... We MUST have valid
340 indices for the various sect_index_* members or gdb will abort.
341 So if for example, there is no ".text" section, we have to
342 accomodate that. First, check for a file with the standard
343 one or two segments. */
345 symfile_find_segment_sections (objfile
);
347 /* Except when explicitly adding symbol files at some address,
348 section_offsets contains nothing but zeros, so it doesn't matter
349 which slot in section_offsets the individual sect_index_* members
350 index into. So if they are all zero, it is safe to just point
351 all the currently uninitialized indices to the first slot. But
352 beware: if this is the main executable, it may be relocated
353 later, e.g. by the remote qOffsets packet, and then this will
354 be wrong! That's why we try segments first. */
356 for (i
= 0; i
< objfile
->num_sections
; i
++)
358 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
363 if (i
== objfile
->num_sections
)
365 if (objfile
->sect_index_text
== -1)
366 objfile
->sect_index_text
= 0;
367 if (objfile
->sect_index_data
== -1)
368 objfile
->sect_index_data
= 0;
369 if (objfile
->sect_index_bss
== -1)
370 objfile
->sect_index_bss
= 0;
371 if (objfile
->sect_index_rodata
== -1)
372 objfile
->sect_index_rodata
= 0;
376 /* The arguments to place_section. */
378 struct place_section_arg
380 struct section_offsets
*offsets
;
384 /* Find a unique offset to use for loadable section SECT if
385 the user did not provide an offset. */
388 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
390 struct place_section_arg
*arg
= obj
;
391 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
393 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
395 /* We are only interested in allocated sections. */
396 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
399 /* If the user specified an offset, honor it. */
400 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
403 /* Otherwise, let's try to find a place for the section. */
404 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
411 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
413 int indx
= cur_sec
->index
;
415 /* We don't need to compare against ourself. */
419 /* We can only conflict with allocated sections. */
420 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
423 /* If the section offset is 0, either the section has not been placed
424 yet, or it was the lowest section placed (in which case LOWEST
425 will be past its end). */
426 if (offsets
[indx
] == 0)
429 /* If this section would overlap us, then we must move up. */
430 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
431 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
433 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
434 start_addr
= (start_addr
+ align
- 1) & -align
;
439 /* Otherwise, we appear to be OK. So far. */
444 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
445 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
448 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
449 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
453 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
455 const struct section_addr_info
*addrs
)
459 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
461 /* Now calculate offsets for section that were specified by the caller. */
462 for (i
= 0; i
< addrs
->num_sections
; i
++)
464 const struct other_sections
*osp
;
466 osp
= &addrs
->other
[i
];
467 if (osp
->sectindex
== -1)
470 /* Record all sections in offsets. */
471 /* The section_offsets in the objfile are here filled in using
473 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
477 /* Transform section name S for a name comparison. prelink can split section
478 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
479 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
480 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
481 (`.sbss') section has invalid (increased) virtual address. */
484 addr_section_name (const char *s
)
486 if (strcmp (s
, ".dynbss") == 0)
488 if (strcmp (s
, ".sdynbss") == 0)
494 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
495 their (name, sectindex) pair. sectindex makes the sort by name stable. */
498 addrs_section_compar (const void *ap
, const void *bp
)
500 const struct other_sections
*a
= *((struct other_sections
**) ap
);
501 const struct other_sections
*b
= *((struct other_sections
**) bp
);
504 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
508 return a
->sectindex
- b
->sectindex
;
511 /* Provide sorted array of pointers to sections of ADDRS. The array is
512 terminated by NULL. Caller is responsible to call xfree for it. */
514 static struct other_sections
**
515 addrs_section_sort (struct section_addr_info
*addrs
)
517 struct other_sections
**array
;
520 /* `+ 1' for the NULL terminator. */
521 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
522 for (i
= 0; i
< addrs
->num_sections
; i
++)
523 array
[i
] = &addrs
->other
[i
];
526 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
531 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
532 also SECTINDEXes specific to ABFD there. This function can be used to
533 rebase ADDRS to start referencing different BFD than before. */
536 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
538 asection
*lower_sect
;
539 CORE_ADDR lower_offset
;
541 struct cleanup
*my_cleanup
;
542 struct section_addr_info
*abfd_addrs
;
543 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
544 struct other_sections
**addrs_to_abfd_addrs
;
546 /* Find lowest loadable section to be used as starting point for
547 continguous sections. */
549 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
550 if (lower_sect
== NULL
)
552 warning (_("no loadable sections found in added symbol-file %s"),
553 bfd_get_filename (abfd
));
557 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
559 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
560 in ABFD. Section names are not unique - there can be multiple sections of
561 the same name. Also the sections of the same name do not have to be
562 adjacent to each other. Some sections may be present only in one of the
563 files. Even sections present in both files do not have to be in the same
566 Use stable sort by name for the sections in both files. Then linearly
567 scan both lists matching as most of the entries as possible. */
569 addrs_sorted
= addrs_section_sort (addrs
);
570 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
572 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
573 make_cleanup_free_section_addr_info (abfd_addrs
);
574 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
575 make_cleanup (xfree
, abfd_addrs_sorted
);
577 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
578 ABFD_ADDRS_SORTED. */
580 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
581 * addrs
->num_sections
);
582 make_cleanup (xfree
, addrs_to_abfd_addrs
);
584 while (*addrs_sorted
)
586 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
588 while (*abfd_addrs_sorted
589 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
593 if (*abfd_addrs_sorted
594 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
599 /* Make the found item directly addressable from ADDRS. */
600 index_in_addrs
= *addrs_sorted
- addrs
->other
;
601 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
602 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
604 /* Never use the same ABFD entry twice. */
611 /* Calculate offsets for the loadable sections.
612 FIXME! Sections must be in order of increasing loadable section
613 so that contiguous sections can use the lower-offset!!!
615 Adjust offsets if the segments are not contiguous.
616 If the section is contiguous, its offset should be set to
617 the offset of the highest loadable section lower than it
618 (the loadable section directly below it in memory).
619 this_offset = lower_offset = lower_addr - lower_orig_addr */
621 for (i
= 0; i
< addrs
->num_sections
; i
++)
623 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
627 /* This is the index used by BFD. */
628 addrs
->other
[i
].sectindex
= sect
->sectindex
;
630 if (addrs
->other
[i
].addr
!= 0)
632 addrs
->other
[i
].addr
-= sect
->addr
;
633 lower_offset
= addrs
->other
[i
].addr
;
636 addrs
->other
[i
].addr
= lower_offset
;
640 /* addr_section_name transformation is not used for SECT_NAME. */
641 const char *sect_name
= addrs
->other
[i
].name
;
643 /* This section does not exist in ABFD, which is normally
644 unexpected and we want to issue a warning.
646 However, the ELF prelinker does create a few sections which are
647 marked in the main executable as loadable (they are loaded in
648 memory from the DYNAMIC segment) and yet are not present in
649 separate debug info files. This is fine, and should not cause
650 a warning. Shared libraries contain just the section
651 ".gnu.liblist" but it is not marked as loadable there. There is
652 no other way to identify them than by their name as the sections
653 created by prelink have no special flags.
655 For the sections `.bss' and `.sbss' see addr_section_name. */
657 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
658 || strcmp (sect_name
, ".gnu.conflict") == 0
659 || (strcmp (sect_name
, ".bss") == 0
661 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
662 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
663 || (strcmp (sect_name
, ".sbss") == 0
665 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
666 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
667 warning (_("section %s not found in %s"), sect_name
,
668 bfd_get_filename (abfd
));
670 addrs
->other
[i
].addr
= 0;
671 addrs
->other
[i
].sectindex
= -1;
675 do_cleanups (my_cleanup
);
678 /* Parse the user's idea of an offset for dynamic linking, into our idea
679 of how to represent it for fast symbol reading. This is the default
680 version of the sym_fns.sym_offsets function for symbol readers that
681 don't need to do anything special. It allocates a section_offsets table
682 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
685 default_symfile_offsets (struct objfile
*objfile
,
686 const struct section_addr_info
*addrs
)
688 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
689 objfile
->section_offsets
= (struct section_offsets
*)
690 obstack_alloc (&objfile
->objfile_obstack
,
691 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
692 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
693 objfile
->num_sections
, addrs
);
695 /* For relocatable files, all loadable sections will start at zero.
696 The zero is meaningless, so try to pick arbitrary addresses such
697 that no loadable sections overlap. This algorithm is quadratic,
698 but the number of sections in a single object file is generally
700 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
702 struct place_section_arg arg
;
703 bfd
*abfd
= objfile
->obfd
;
706 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
707 /* We do not expect this to happen; just skip this step if the
708 relocatable file has a section with an assigned VMA. */
709 if (bfd_section_vma (abfd
, cur_sec
) != 0)
714 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
716 /* Pick non-overlapping offsets for sections the user did not
718 arg
.offsets
= objfile
->section_offsets
;
720 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
722 /* Correctly filling in the section offsets is not quite
723 enough. Relocatable files have two properties that
724 (most) shared objects do not:
726 - Their debug information will contain relocations. Some
727 shared libraries do also, but many do not, so this can not
730 - If there are multiple code sections they will be loaded
731 at different relative addresses in memory than they are
732 in the objfile, since all sections in the file will start
735 Because GDB has very limited ability to map from an
736 address in debug info to the correct code section,
737 it relies on adding SECT_OFF_TEXT to things which might be
738 code. If we clear all the section offsets, and set the
739 section VMAs instead, then symfile_relocate_debug_section
740 will return meaningful debug information pointing at the
743 GDB has too many different data structures for section
744 addresses - a bfd, objfile, and so_list all have section
745 tables, as does exec_ops. Some of these could probably
748 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
749 cur_sec
= cur_sec
->next
)
751 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
754 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
755 exec_set_section_address (bfd_get_filename (abfd
),
757 offsets
[cur_sec
->index
]);
758 offsets
[cur_sec
->index
] = 0;
763 /* Remember the bfd indexes for the .text, .data, .bss and
765 init_objfile_sect_indices (objfile
);
768 /* Divide the file into segments, which are individual relocatable units.
769 This is the default version of the sym_fns.sym_segments function for
770 symbol readers that do not have an explicit representation of segments.
771 It assumes that object files do not have segments, and fully linked
772 files have a single segment. */
774 struct symfile_segment_data
*
775 default_symfile_segments (bfd
*abfd
)
779 struct symfile_segment_data
*data
;
782 /* Relocatable files contain enough information to position each
783 loadable section independently; they should not be relocated
785 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
788 /* Make sure there is at least one loadable section in the file. */
789 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
791 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
799 low
= bfd_get_section_vma (abfd
, sect
);
800 high
= low
+ bfd_get_section_size (sect
);
802 data
= XCNEW (struct symfile_segment_data
);
803 data
->num_segments
= 1;
804 data
->segment_bases
= XCNEW (CORE_ADDR
);
805 data
->segment_sizes
= XCNEW (CORE_ADDR
);
807 num_sections
= bfd_count_sections (abfd
);
808 data
->segment_info
= XCNEWVEC (int, num_sections
);
810 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
814 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
817 vma
= bfd_get_section_vma (abfd
, sect
);
820 if (vma
+ bfd_get_section_size (sect
) > high
)
821 high
= vma
+ bfd_get_section_size (sect
);
823 data
->segment_info
[i
] = 1;
826 data
->segment_bases
[0] = low
;
827 data
->segment_sizes
[0] = high
- low
;
832 /* This is a convenience function to call sym_read for OBJFILE and
833 possibly force the partial symbols to be read. */
836 read_symbols (struct objfile
*objfile
, int add_flags
)
838 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
840 /* find_separate_debug_file_in_section should be called only if there is
841 single binary with no existing separate debug info file. */
842 if (!objfile_has_partial_symbols (objfile
)
843 && objfile
->separate_debug_objfile
== NULL
844 && objfile
->separate_debug_objfile_backlink
== NULL
)
846 bfd
*abfd
= find_separate_debug_file_in_section (objfile
);
847 struct cleanup
*cleanup
= make_cleanup_bfd_unref (abfd
);
851 /* find_separate_debug_file_in_section uses the same filename for the
852 virtual section-as-bfd like the bfd filename containing the
853 section. Therefore use also non-canonical name form for the same
854 file containing the section. */
855 symbol_file_add_separate (abfd
, objfile
->original_name
, add_flags
,
859 do_cleanups (cleanup
);
861 if ((add_flags
& SYMFILE_NO_READ
) == 0)
862 require_partial_symbols (objfile
, 0);
865 /* Initialize entry point information for this objfile. */
868 init_entry_point_info (struct objfile
*objfile
)
870 /* Save startup file's range of PC addresses to help blockframe.c
871 decide where the bottom of the stack is. */
873 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
875 /* Executable file -- record its entry point so we'll recognize
876 the startup file because it contains the entry point. */
877 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
878 objfile
->ei
.entry_point_p
= 1;
880 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
881 && bfd_get_start_address (objfile
->obfd
) != 0)
883 /* Some shared libraries may have entry points set and be
884 runnable. There's no clear way to indicate this, so just check
885 for values other than zero. */
886 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
887 objfile
->ei
.entry_point_p
= 1;
891 /* Examination of non-executable.o files. Short-circuit this stuff. */
892 objfile
->ei
.entry_point_p
= 0;
895 if (objfile
->ei
.entry_point_p
)
897 CORE_ADDR entry_point
= objfile
->ei
.entry_point
;
899 /* Make certain that the address points at real code, and not a
900 function descriptor. */
902 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
906 /* Remove any ISA markers, so that this matches entries in the
908 objfile
->ei
.entry_point
909 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
913 /* Process a symbol file, as either the main file or as a dynamically
916 This function does not set the OBJFILE's entry-point info.
918 OBJFILE is where the symbols are to be read from.
920 ADDRS is the list of section load addresses. If the user has given
921 an 'add-symbol-file' command, then this is the list of offsets and
922 addresses he or she provided as arguments to the command; or, if
923 we're handling a shared library, these are the actual addresses the
924 sections are loaded at, according to the inferior's dynamic linker
925 (as gleaned by GDB's shared library code). We convert each address
926 into an offset from the section VMA's as it appears in the object
927 file, and then call the file's sym_offsets function to convert this
928 into a format-specific offset table --- a `struct section_offsets'.
930 ADD_FLAGS encodes verbosity level, whether this is main symbol or
931 an extra symbol file such as dynamically loaded code, and wether
932 breakpoint reset should be deferred. */
935 syms_from_objfile_1 (struct objfile
*objfile
,
936 struct section_addr_info
*addrs
,
939 struct section_addr_info
*local_addr
= NULL
;
940 struct cleanup
*old_chain
;
941 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
943 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
945 if (objfile
->sf
== NULL
)
947 /* No symbols to load, but we still need to make sure
948 that the section_offsets table is allocated. */
949 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
950 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
952 objfile
->num_sections
= num_sections
;
953 objfile
->section_offsets
954 = obstack_alloc (&objfile
->objfile_obstack
, size
);
955 memset (objfile
->section_offsets
, 0, size
);
959 /* Make sure that partially constructed symbol tables will be cleaned up
960 if an error occurs during symbol reading. */
961 old_chain
= make_cleanup_free_objfile (objfile
);
963 /* If ADDRS is NULL, put together a dummy address list.
964 We now establish the convention that an addr of zero means
965 no load address was specified. */
968 local_addr
= alloc_section_addr_info (1);
969 make_cleanup (xfree
, local_addr
);
975 /* We will modify the main symbol table, make sure that all its users
976 will be cleaned up if an error occurs during symbol reading. */
977 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
979 /* Since no error yet, throw away the old symbol table. */
981 if (symfile_objfile
!= NULL
)
983 free_objfile (symfile_objfile
);
984 gdb_assert (symfile_objfile
== NULL
);
987 /* Currently we keep symbols from the add-symbol-file command.
988 If the user wants to get rid of them, they should do "symbol-file"
989 without arguments first. Not sure this is the best behavior
992 (*objfile
->sf
->sym_new_init
) (objfile
);
995 /* Convert addr into an offset rather than an absolute address.
996 We find the lowest address of a loaded segment in the objfile,
997 and assume that <addr> is where that got loaded.
999 We no longer warn if the lowest section is not a text segment (as
1000 happens for the PA64 port. */
1001 if (addrs
->num_sections
> 0)
1002 addr_info_make_relative (addrs
, objfile
->obfd
);
1004 /* Initialize symbol reading routines for this objfile, allow complaints to
1005 appear for this new file, and record how verbose to be, then do the
1006 initial symbol reading for this file. */
1008 (*objfile
->sf
->sym_init
) (objfile
);
1009 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1011 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1013 read_symbols (objfile
, add_flags
);
1015 /* Discard cleanups as symbol reading was successful. */
1017 discard_cleanups (old_chain
);
1021 /* Same as syms_from_objfile_1, but also initializes the objfile
1022 entry-point info. */
1025 syms_from_objfile (struct objfile
*objfile
,
1026 struct section_addr_info
*addrs
,
1029 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1030 init_entry_point_info (objfile
);
1033 /* Perform required actions after either reading in the initial
1034 symbols for a new objfile, or mapping in the symbols from a reusable
1035 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1038 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1040 /* If this is the main symbol file we have to clean up all users of the
1041 old main symbol file. Otherwise it is sufficient to fixup all the
1042 breakpoints that may have been redefined by this symbol file. */
1043 if (add_flags
& SYMFILE_MAINLINE
)
1045 /* OK, make it the "real" symbol file. */
1046 symfile_objfile
= objfile
;
1048 clear_symtab_users (add_flags
);
1050 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1052 breakpoint_re_set ();
1055 /* We're done reading the symbol file; finish off complaints. */
1056 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1059 /* Process a symbol file, as either the main file or as a dynamically
1062 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1063 A new reference is acquired by this function.
1065 For NAME description see allocate_objfile's definition.
1067 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1068 extra, such as dynamically loaded code, and what to do with breakpoins.
1070 ADDRS is as described for syms_from_objfile_1, above.
1071 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1073 PARENT is the original objfile if ABFD is a separate debug info file.
1074 Otherwise PARENT is NULL.
1076 Upon success, returns a pointer to the objfile that was added.
1077 Upon failure, jumps back to command level (never returns). */
1079 static struct objfile
*
1080 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
, int add_flags
,
1081 struct section_addr_info
*addrs
,
1082 int flags
, struct objfile
*parent
)
1084 struct objfile
*objfile
;
1085 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1086 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1087 const int should_print
= ((from_tty
|| info_verbose
)
1088 && (readnow_symbol_files
1089 || (add_flags
& SYMFILE_NO_READ
) == 0));
1091 if (readnow_symbol_files
)
1093 flags
|= OBJF_READNOW
;
1094 add_flags
&= ~SYMFILE_NO_READ
;
1097 /* Give user a chance to burp if we'd be
1098 interactively wiping out any existing symbols. */
1100 if ((have_full_symbols () || have_partial_symbols ())
1103 && !query (_("Load new symbol table from \"%s\"? "), name
))
1104 error (_("Not confirmed."));
1106 objfile
= allocate_objfile (abfd
, name
,
1107 flags
| (mainline
? OBJF_MAINLINE
: 0));
1110 add_separate_debug_objfile (objfile
, parent
);
1112 /* We either created a new mapped symbol table, mapped an existing
1113 symbol table file which has not had initial symbol reading
1114 performed, or need to read an unmapped symbol table. */
1117 if (deprecated_pre_add_symbol_hook
)
1118 deprecated_pre_add_symbol_hook (name
);
1121 printf_unfiltered (_("Reading symbols from %s..."), name
);
1123 gdb_flush (gdb_stdout
);
1126 syms_from_objfile (objfile
, addrs
, add_flags
);
1128 /* We now have at least a partial symbol table. Check to see if the
1129 user requested that all symbols be read on initial access via either
1130 the gdb startup command line or on a per symbol file basis. Expand
1131 all partial symbol tables for this objfile if so. */
1133 if ((flags
& OBJF_READNOW
))
1137 printf_unfiltered (_("expanding to full symbols..."));
1139 gdb_flush (gdb_stdout
);
1143 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1146 if (should_print
&& !objfile_has_symbols (objfile
))
1149 printf_unfiltered (_("(no debugging symbols found)..."));
1155 if (deprecated_post_add_symbol_hook
)
1156 deprecated_post_add_symbol_hook ();
1158 printf_unfiltered (_("done.\n"));
1161 /* We print some messages regardless of whether 'from_tty ||
1162 info_verbose' is true, so make sure they go out at the right
1164 gdb_flush (gdb_stdout
);
1166 if (objfile
->sf
== NULL
)
1168 observer_notify_new_objfile (objfile
);
1169 return objfile
; /* No symbols. */
1172 new_symfile_objfile (objfile
, add_flags
);
1174 observer_notify_new_objfile (objfile
);
1176 bfd_cache_close_all ();
1180 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1181 see allocate_objfile's definition. */
1184 symbol_file_add_separate (bfd
*bfd
, const char *name
, int symfile_flags
,
1185 struct objfile
*objfile
)
1187 struct objfile
*new_objfile
;
1188 struct section_addr_info
*sap
;
1189 struct cleanup
*my_cleanup
;
1191 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1192 because sections of BFD may not match sections of OBJFILE and because
1193 vma may have been modified by tools such as prelink. */
1194 sap
= build_section_addr_info_from_objfile (objfile
);
1195 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1197 new_objfile
= symbol_file_add_with_addrs
1198 (bfd
, name
, symfile_flags
, sap
,
1199 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1203 do_cleanups (my_cleanup
);
1206 /* Process the symbol file ABFD, as either the main file or as a
1207 dynamically loaded file.
1208 See symbol_file_add_with_addrs's comments for details. */
1211 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
, int add_flags
,
1212 struct section_addr_info
*addrs
,
1213 int flags
, struct objfile
*parent
)
1215 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1219 /* Process a symbol file, as either the main file or as a dynamically
1220 loaded file. See symbol_file_add_with_addrs's comments for details. */
1223 symbol_file_add (const char *name
, int add_flags
,
1224 struct section_addr_info
*addrs
, int flags
)
1226 bfd
*bfd
= symfile_bfd_open (name
);
1227 struct cleanup
*cleanup
= make_cleanup_bfd_unref (bfd
);
1228 struct objfile
*objf
;
1230 objf
= symbol_file_add_from_bfd (bfd
, name
, add_flags
, addrs
, flags
, NULL
);
1231 do_cleanups (cleanup
);
1235 /* Call symbol_file_add() with default values and update whatever is
1236 affected by the loading of a new main().
1237 Used when the file is supplied in the gdb command line
1238 and by some targets with special loading requirements.
1239 The auxiliary function, symbol_file_add_main_1(), has the flags
1240 argument for the switches that can only be specified in the symbol_file
1244 symbol_file_add_main (const char *args
, int from_tty
)
1246 symbol_file_add_main_1 (args
, from_tty
, 0);
1250 symbol_file_add_main_1 (const char *args
, int from_tty
, int flags
)
1252 const int add_flags
= (current_inferior ()->symfile_flags
1253 | SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0));
1255 symbol_file_add (args
, add_flags
, NULL
, flags
);
1257 /* Getting new symbols may change our opinion about
1258 what is frameless. */
1259 reinit_frame_cache ();
1261 if ((flags
& SYMFILE_NO_READ
) == 0)
1262 set_initial_language ();
1266 symbol_file_clear (int from_tty
)
1268 if ((have_full_symbols () || have_partial_symbols ())
1271 ? !query (_("Discard symbol table from `%s'? "),
1272 objfile_name (symfile_objfile
))
1273 : !query (_("Discard symbol table? "))))
1274 error (_("Not confirmed."));
1276 /* solib descriptors may have handles to objfiles. Wipe them before their
1277 objfiles get stale by free_all_objfiles. */
1278 no_shared_libraries (NULL
, from_tty
);
1280 free_all_objfiles ();
1282 gdb_assert (symfile_objfile
== NULL
);
1284 printf_unfiltered (_("No symbol file now.\n"));
1288 separate_debug_file_exists (const char *name
, unsigned long crc
,
1289 struct objfile
*parent_objfile
)
1291 unsigned long file_crc
;
1294 struct stat parent_stat
, abfd_stat
;
1295 int verified_as_different
;
1297 /* Find a separate debug info file as if symbols would be present in
1298 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1299 section can contain just the basename of PARENT_OBJFILE without any
1300 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1301 the separate debug infos with the same basename can exist. */
1303 if (filename_cmp (name
, objfile_name (parent_objfile
)) == 0)
1306 abfd
= gdb_bfd_open_maybe_remote (name
);
1311 /* Verify symlinks were not the cause of filename_cmp name difference above.
1313 Some operating systems, e.g. Windows, do not provide a meaningful
1314 st_ino; they always set it to zero. (Windows does provide a
1315 meaningful st_dev.) Do not indicate a duplicate library in that
1316 case. While there is no guarantee that a system that provides
1317 meaningful inode numbers will never set st_ino to zero, this is
1318 merely an optimization, so we do not need to worry about false
1321 if (bfd_stat (abfd
, &abfd_stat
) == 0
1322 && abfd_stat
.st_ino
!= 0
1323 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1325 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1326 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1328 gdb_bfd_unref (abfd
);
1331 verified_as_different
= 1;
1334 verified_as_different
= 0;
1336 file_crc_p
= gdb_bfd_crc (abfd
, &file_crc
);
1338 gdb_bfd_unref (abfd
);
1343 if (crc
!= file_crc
)
1345 unsigned long parent_crc
;
1347 /* If one (or both) the files are accessed for example the via "remote:"
1348 gdbserver way it does not support the bfd_stat operation. Verify
1349 whether those two files are not the same manually. */
1351 if (!verified_as_different
)
1353 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1357 if (verified_as_different
|| parent_crc
!= file_crc
)
1358 warning (_("the debug information found in \"%s\""
1359 " does not match \"%s\" (CRC mismatch).\n"),
1360 name
, objfile_name (parent_objfile
));
1368 char *debug_file_directory
= NULL
;
1370 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1371 struct cmd_list_element
*c
, const char *value
)
1373 fprintf_filtered (file
,
1374 _("The directory where separate debug "
1375 "symbols are searched for is \"%s\".\n"),
1379 #if ! defined (DEBUG_SUBDIRECTORY)
1380 #define DEBUG_SUBDIRECTORY ".debug"
1383 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1384 where the original file resides (may not be the same as
1385 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1386 looking for. CANON_DIR is the "realpath" form of DIR.
1387 DIR must contain a trailing '/'.
1388 Returns the path of the file with separate debug info, of NULL. */
1391 find_separate_debug_file (const char *dir
,
1392 const char *canon_dir
,
1393 const char *debuglink
,
1394 unsigned long crc32
, struct objfile
*objfile
)
1399 VEC (char_ptr
) *debugdir_vec
;
1400 struct cleanup
*back_to
;
1403 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1405 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1406 i
= strlen (canon_dir
);
1408 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1410 + strlen (DEBUG_SUBDIRECTORY
)
1412 + strlen (debuglink
)
1415 /* First try in the same directory as the original file. */
1416 strcpy (debugfile
, dir
);
1417 strcat (debugfile
, debuglink
);
1419 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1422 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1423 strcpy (debugfile
, dir
);
1424 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1425 strcat (debugfile
, "/");
1426 strcat (debugfile
, debuglink
);
1428 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1431 /* Then try in the global debugfile directories.
1433 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1434 cause "/..." lookups. */
1436 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1437 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1439 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1441 strcpy (debugfile
, debugdir
);
1442 strcat (debugfile
, "/");
1443 strcat (debugfile
, dir
);
1444 strcat (debugfile
, debuglink
);
1446 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1448 do_cleanups (back_to
);
1452 /* If the file is in the sysroot, try using its base path in the
1453 global debugfile directory. */
1454 if (canon_dir
!= NULL
1455 && filename_ncmp (canon_dir
, gdb_sysroot
,
1456 strlen (gdb_sysroot
)) == 0
1457 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1459 strcpy (debugfile
, debugdir
);
1460 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1461 strcat (debugfile
, "/");
1462 strcat (debugfile
, debuglink
);
1464 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1466 do_cleanups (back_to
);
1472 do_cleanups (back_to
);
1477 /* Modify PATH to contain only "[/]directory/" part of PATH.
1478 If there were no directory separators in PATH, PATH will be empty
1479 string on return. */
1482 terminate_after_last_dir_separator (char *path
)
1486 /* Strip off the final filename part, leaving the directory name,
1487 followed by a slash. The directory can be relative or absolute. */
1488 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1489 if (IS_DIR_SEPARATOR (path
[i
]))
1492 /* If I is -1 then no directory is present there and DIR will be "". */
1496 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1497 Returns pathname, or NULL. */
1500 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1503 char *dir
, *canon_dir
;
1505 unsigned long crc32
;
1506 struct cleanup
*cleanups
;
1508 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1510 if (debuglink
== NULL
)
1512 /* There's no separate debug info, hence there's no way we could
1513 load it => no warning. */
1517 cleanups
= make_cleanup (xfree
, debuglink
);
1518 dir
= xstrdup (objfile_name (objfile
));
1519 make_cleanup (xfree
, dir
);
1520 terminate_after_last_dir_separator (dir
);
1521 canon_dir
= lrealpath (dir
);
1523 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1527 if (debugfile
== NULL
)
1530 /* For PR gdb/9538, try again with realpath (if different from the
1535 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1536 && S_ISLNK (st_buf
.st_mode
))
1540 symlink_dir
= lrealpath (objfile_name (objfile
));
1541 if (symlink_dir
!= NULL
)
1543 make_cleanup (xfree
, symlink_dir
);
1544 terminate_after_last_dir_separator (symlink_dir
);
1545 if (strcmp (dir
, symlink_dir
) != 0)
1547 /* Different directory, so try using it. */
1548 debugfile
= find_separate_debug_file (symlink_dir
,
1556 #endif /* HAVE_LSTAT */
1559 do_cleanups (cleanups
);
1563 /* This is the symbol-file command. Read the file, analyze its
1564 symbols, and add a struct symtab to a symtab list. The syntax of
1565 the command is rather bizarre:
1567 1. The function buildargv implements various quoting conventions
1568 which are undocumented and have little or nothing in common with
1569 the way things are quoted (or not quoted) elsewhere in GDB.
1571 2. Options are used, which are not generally used in GDB (perhaps
1572 "set mapped on", "set readnow on" would be better)
1574 3. The order of options matters, which is contrary to GNU
1575 conventions (because it is confusing and inconvenient). */
1578 symbol_file_command (char *args
, int from_tty
)
1584 symbol_file_clear (from_tty
);
1588 char **argv
= gdb_buildargv (args
);
1589 int flags
= OBJF_USERLOADED
;
1590 struct cleanup
*cleanups
;
1593 cleanups
= make_cleanup_freeargv (argv
);
1594 while (*argv
!= NULL
)
1596 if (strcmp (*argv
, "-readnow") == 0)
1597 flags
|= OBJF_READNOW
;
1598 else if (**argv
== '-')
1599 error (_("unknown option `%s'"), *argv
);
1602 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1610 error (_("no symbol file name was specified"));
1612 do_cleanups (cleanups
);
1616 /* Set the initial language.
1618 FIXME: A better solution would be to record the language in the
1619 psymtab when reading partial symbols, and then use it (if known) to
1620 set the language. This would be a win for formats that encode the
1621 language in an easily discoverable place, such as DWARF. For
1622 stabs, we can jump through hoops looking for specially named
1623 symbols or try to intuit the language from the specific type of
1624 stabs we find, but we can't do that until later when we read in
1628 set_initial_language (void)
1630 enum language lang
= language_unknown
;
1632 if (language_of_main
!= language_unknown
)
1633 lang
= language_of_main
;
1636 char *name
= main_name ();
1637 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
);
1640 lang
= SYMBOL_LANGUAGE (sym
);
1643 if (lang
== language_unknown
)
1645 /* Make C the default language */
1649 set_language (lang
);
1650 expected_language
= current_language
; /* Don't warn the user. */
1653 /* If NAME is a remote name open the file using remote protocol, otherwise
1654 open it normally. Returns a new reference to the BFD. On error,
1655 returns NULL with the BFD error set. */
1658 gdb_bfd_open_maybe_remote (const char *name
)
1662 if (remote_filename_p (name
))
1663 result
= remote_bfd_open (name
, gnutarget
);
1665 result
= gdb_bfd_open (name
, gnutarget
, -1);
1670 /* Open the file specified by NAME and hand it off to BFD for
1671 preliminary analysis. Return a newly initialized bfd *, which
1672 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1673 absolute). In case of trouble, error() is called. */
1676 symfile_bfd_open (const char *cname
)
1680 char *name
, *absolute_name
;
1681 struct cleanup
*back_to
;
1683 if (remote_filename_p (cname
))
1685 sym_bfd
= remote_bfd_open (cname
, gnutarget
);
1687 error (_("`%s': can't open to read symbols: %s."), cname
,
1688 bfd_errmsg (bfd_get_error ()));
1690 if (!bfd_check_format (sym_bfd
, bfd_object
))
1692 make_cleanup_bfd_unref (sym_bfd
);
1693 error (_("`%s': can't read symbols: %s."), cname
,
1694 bfd_errmsg (bfd_get_error ()));
1700 name
= tilde_expand (cname
); /* Returns 1st new malloc'd copy. */
1702 /* Look down path for it, allocate 2nd new malloc'd copy. */
1703 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
, name
,
1704 O_RDONLY
| O_BINARY
, &absolute_name
);
1705 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1708 char *exename
= alloca (strlen (name
) + 5);
1710 strcat (strcpy (exename
, name
), ".exe");
1711 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1712 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1717 make_cleanup (xfree
, name
);
1718 perror_with_name (name
);
1722 name
= absolute_name
;
1723 back_to
= make_cleanup (xfree
, name
);
1725 sym_bfd
= gdb_bfd_open (name
, gnutarget
, desc
);
1727 error (_("`%s': can't open to read symbols: %s."), name
,
1728 bfd_errmsg (bfd_get_error ()));
1729 bfd_set_cacheable (sym_bfd
, 1);
1731 if (!bfd_check_format (sym_bfd
, bfd_object
))
1733 make_cleanup_bfd_unref (sym_bfd
);
1734 error (_("`%s': can't read symbols: %s."), name
,
1735 bfd_errmsg (bfd_get_error ()));
1738 do_cleanups (back_to
);
1743 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1744 the section was not found. */
1747 get_section_index (struct objfile
*objfile
, char *section_name
)
1749 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1757 /* Link SF into the global symtab_fns list.
1758 FLAVOUR is the file format that SF handles.
1759 Called on startup by the _initialize routine in each object file format
1760 reader, to register information about each format the reader is prepared
1764 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1766 registered_sym_fns fns
= { flavour
, sf
};
1768 VEC_safe_push (registered_sym_fns
, symtab_fns
, &fns
);
1771 /* Initialize OBJFILE to read symbols from its associated BFD. It
1772 either returns or calls error(). The result is an initialized
1773 struct sym_fns in the objfile structure, that contains cached
1774 information about the symbol file. */
1776 static const struct sym_fns
*
1777 find_sym_fns (bfd
*abfd
)
1779 registered_sym_fns
*rsf
;
1780 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1783 if (our_flavour
== bfd_target_srec_flavour
1784 || our_flavour
== bfd_target_ihex_flavour
1785 || our_flavour
== bfd_target_tekhex_flavour
)
1786 return NULL
; /* No symbols. */
1788 for (i
= 0; VEC_iterate (registered_sym_fns
, symtab_fns
, i
, rsf
); ++i
)
1789 if (our_flavour
== rsf
->sym_flavour
)
1790 return rsf
->sym_fns
;
1792 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1793 bfd_get_target (abfd
));
1797 /* This function runs the load command of our current target. */
1800 load_command (char *arg
, int from_tty
)
1802 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1806 /* The user might be reloading because the binary has changed. Take
1807 this opportunity to check. */
1808 reopen_exec_file ();
1816 parg
= arg
= get_exec_file (1);
1818 /* Count how many \ " ' tab space there are in the name. */
1819 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1827 /* We need to quote this string so buildargv can pull it apart. */
1828 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1832 make_cleanup (xfree
, temp
);
1835 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1837 strncpy (ptemp
, prev
, parg
- prev
);
1838 ptemp
+= parg
- prev
;
1842 strcpy (ptemp
, prev
);
1848 target_load (arg
, from_tty
);
1850 /* After re-loading the executable, we don't really know which
1851 overlays are mapped any more. */
1852 overlay_cache_invalid
= 1;
1854 do_cleanups (cleanup
);
1857 /* This version of "load" should be usable for any target. Currently
1858 it is just used for remote targets, not inftarg.c or core files,
1859 on the theory that only in that case is it useful.
1861 Avoiding xmodem and the like seems like a win (a) because we don't have
1862 to worry about finding it, and (b) On VMS, fork() is very slow and so
1863 we don't want to run a subprocess. On the other hand, I'm not sure how
1864 performance compares. */
1866 static int validate_download
= 0;
1868 /* Callback service function for generic_load (bfd_map_over_sections). */
1871 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1873 bfd_size_type
*sum
= data
;
1875 *sum
+= bfd_get_section_size (asec
);
1878 /* Opaque data for load_section_callback. */
1879 struct load_section_data
{
1880 CORE_ADDR load_offset
;
1881 struct load_progress_data
*progress_data
;
1882 VEC(memory_write_request_s
) *requests
;
1885 /* Opaque data for load_progress. */
1886 struct load_progress_data
{
1887 /* Cumulative data. */
1888 unsigned long write_count
;
1889 unsigned long data_count
;
1890 bfd_size_type total_size
;
1893 /* Opaque data for load_progress for a single section. */
1894 struct load_progress_section_data
{
1895 struct load_progress_data
*cumulative
;
1897 /* Per-section data. */
1898 const char *section_name
;
1899 ULONGEST section_sent
;
1900 ULONGEST section_size
;
1905 /* Target write callback routine for progress reporting. */
1908 load_progress (ULONGEST bytes
, void *untyped_arg
)
1910 struct load_progress_section_data
*args
= untyped_arg
;
1911 struct load_progress_data
*totals
;
1914 /* Writing padding data. No easy way to get at the cumulative
1915 stats, so just ignore this. */
1918 totals
= args
->cumulative
;
1920 if (bytes
== 0 && args
->section_sent
== 0)
1922 /* The write is just starting. Let the user know we've started
1924 ui_out_message (current_uiout
, 0, "Loading section %s, size %s lma %s\n",
1925 args
->section_name
, hex_string (args
->section_size
),
1926 paddress (target_gdbarch (), args
->lma
));
1930 if (validate_download
)
1932 /* Broken memories and broken monitors manifest themselves here
1933 when bring new computers to life. This doubles already slow
1935 /* NOTE: cagney/1999-10-18: A more efficient implementation
1936 might add a verify_memory() method to the target vector and
1937 then use that. remote.c could implement that method using
1938 the ``qCRC'' packet. */
1939 gdb_byte
*check
= xmalloc (bytes
);
1940 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1942 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1943 error (_("Download verify read failed at %s"),
1944 paddress (target_gdbarch (), args
->lma
));
1945 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1946 error (_("Download verify compare failed at %s"),
1947 paddress (target_gdbarch (), args
->lma
));
1948 do_cleanups (verify_cleanups
);
1950 totals
->data_count
+= bytes
;
1952 args
->buffer
+= bytes
;
1953 totals
->write_count
+= 1;
1954 args
->section_sent
+= bytes
;
1955 if (check_quit_flag ()
1956 || (deprecated_ui_load_progress_hook
!= NULL
1957 && deprecated_ui_load_progress_hook (args
->section_name
,
1958 args
->section_sent
)))
1959 error (_("Canceled the download"));
1961 if (deprecated_show_load_progress
!= NULL
)
1962 deprecated_show_load_progress (args
->section_name
,
1966 totals
->total_size
);
1969 /* Callback service function for generic_load (bfd_map_over_sections). */
1972 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1974 struct memory_write_request
*new_request
;
1975 struct load_section_data
*args
= data
;
1976 struct load_progress_section_data
*section_data
;
1977 bfd_size_type size
= bfd_get_section_size (asec
);
1979 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1981 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1987 new_request
= VEC_safe_push (memory_write_request_s
,
1988 args
->requests
, NULL
);
1989 memset (new_request
, 0, sizeof (struct memory_write_request
));
1990 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1991 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1992 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
1994 new_request
->data
= xmalloc (size
);
1995 new_request
->baton
= section_data
;
1997 buffer
= new_request
->data
;
1999 section_data
->cumulative
= args
->progress_data
;
2000 section_data
->section_name
= sect_name
;
2001 section_data
->section_size
= size
;
2002 section_data
->lma
= new_request
->begin
;
2003 section_data
->buffer
= buffer
;
2005 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2008 /* Clean up an entire memory request vector, including load
2009 data and progress records. */
2012 clear_memory_write_data (void *arg
)
2014 VEC(memory_write_request_s
) **vec_p
= arg
;
2015 VEC(memory_write_request_s
) *vec
= *vec_p
;
2017 struct memory_write_request
*mr
;
2019 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2024 VEC_free (memory_write_request_s
, vec
);
2028 generic_load (char *args
, int from_tty
)
2031 struct timeval start_time
, end_time
;
2033 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2034 struct load_section_data cbdata
;
2035 struct load_progress_data total_progress
;
2036 struct ui_out
*uiout
= current_uiout
;
2041 memset (&cbdata
, 0, sizeof (cbdata
));
2042 memset (&total_progress
, 0, sizeof (total_progress
));
2043 cbdata
.progress_data
= &total_progress
;
2045 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2048 error_no_arg (_("file to load"));
2050 argv
= gdb_buildargv (args
);
2051 make_cleanup_freeargv (argv
);
2053 filename
= tilde_expand (argv
[0]);
2054 make_cleanup (xfree
, filename
);
2056 if (argv
[1] != NULL
)
2060 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2062 /* If the last word was not a valid number then
2063 treat it as a file name with spaces in. */
2064 if (argv
[1] == endptr
)
2065 error (_("Invalid download offset:%s."), argv
[1]);
2067 if (argv
[2] != NULL
)
2068 error (_("Too many parameters."));
2071 /* Open the file for loading. */
2072 loadfile_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2073 if (loadfile_bfd
== NULL
)
2075 perror_with_name (filename
);
2079 make_cleanup_bfd_unref (loadfile_bfd
);
2081 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2083 error (_("\"%s\" is not an object file: %s"), filename
,
2084 bfd_errmsg (bfd_get_error ()));
2087 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2088 (void *) &total_progress
.total_size
);
2090 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2092 gettimeofday (&start_time
, NULL
);
2094 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2095 load_progress
) != 0)
2096 error (_("Load failed"));
2098 gettimeofday (&end_time
, NULL
);
2100 entry
= bfd_get_start_address (loadfile_bfd
);
2101 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2102 ui_out_text (uiout
, "Start address ");
2103 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch (), entry
));
2104 ui_out_text (uiout
, ", load size ");
2105 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2106 ui_out_text (uiout
, "\n");
2107 /* We were doing this in remote-mips.c, I suspect it is right
2108 for other targets too. */
2109 regcache_write_pc (get_current_regcache (), entry
);
2111 /* Reset breakpoints, now that we have changed the load image. For
2112 instance, breakpoints may have been set (or reset, by
2113 post_create_inferior) while connected to the target but before we
2114 loaded the program. In that case, the prologue analyzer could
2115 have read instructions from the target to find the right
2116 breakpoint locations. Loading has changed the contents of that
2119 breakpoint_re_set ();
2121 /* FIXME: are we supposed to call symbol_file_add or not? According
2122 to a comment from remote-mips.c (where a call to symbol_file_add
2123 was commented out), making the call confuses GDB if more than one
2124 file is loaded in. Some targets do (e.g., remote-vx.c) but
2125 others don't (or didn't - perhaps they have all been deleted). */
2127 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2128 total_progress
.write_count
,
2129 &start_time
, &end_time
);
2131 do_cleanups (old_cleanups
);
2134 /* Report how fast the transfer went. */
2137 print_transfer_performance (struct ui_file
*stream
,
2138 unsigned long data_count
,
2139 unsigned long write_count
,
2140 const struct timeval
*start_time
,
2141 const struct timeval
*end_time
)
2143 ULONGEST time_count
;
2144 struct ui_out
*uiout
= current_uiout
;
2146 /* Compute the elapsed time in milliseconds, as a tradeoff between
2147 accuracy and overflow. */
2148 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2149 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2151 ui_out_text (uiout
, "Transfer rate: ");
2154 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2156 if (ui_out_is_mi_like_p (uiout
))
2158 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2159 ui_out_text (uiout
, " bits/sec");
2161 else if (rate
< 1024)
2163 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2164 ui_out_text (uiout
, " bytes/sec");
2168 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2169 ui_out_text (uiout
, " KB/sec");
2174 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2175 ui_out_text (uiout
, " bits in <1 sec");
2177 if (write_count
> 0)
2179 ui_out_text (uiout
, ", ");
2180 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2181 ui_out_text (uiout
, " bytes/write");
2183 ui_out_text (uiout
, ".\n");
2186 /* This function allows the addition of incrementally linked object files.
2187 It does not modify any state in the target, only in the debugger. */
2188 /* Note: ezannoni 2000-04-13 This function/command used to have a
2189 special case syntax for the rombug target (Rombug is the boot
2190 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2191 rombug case, the user doesn't need to supply a text address,
2192 instead a call to target_link() (in target.c) would supply the
2193 value to use. We are now discontinuing this type of ad hoc syntax. */
2196 add_symbol_file_command (char *args
, int from_tty
)
2198 struct gdbarch
*gdbarch
= get_current_arch ();
2199 char *filename
= NULL
;
2200 int flags
= OBJF_USERLOADED
;
2202 int section_index
= 0;
2206 int expecting_sec_name
= 0;
2207 int expecting_sec_addr
= 0;
2209 struct objfile
*objf
;
2217 struct section_addr_info
*section_addrs
;
2218 struct sect_opt
*sect_opts
= NULL
;
2219 size_t num_sect_opts
= 0;
2220 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2223 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2224 * sizeof (struct sect_opt
));
2229 error (_("add-symbol-file takes a file name and an address"));
2231 argv
= gdb_buildargv (args
);
2232 make_cleanup_freeargv (argv
);
2234 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2236 /* Process the argument. */
2239 /* The first argument is the file name. */
2240 filename
= tilde_expand (arg
);
2241 make_cleanup (xfree
, filename
);
2243 else if (argcnt
== 1)
2245 /* The second argument is always the text address at which
2246 to load the program. */
2247 sect_opts
[section_index
].name
= ".text";
2248 sect_opts
[section_index
].value
= arg
;
2249 if (++section_index
>= num_sect_opts
)
2252 sect_opts
= ((struct sect_opt
*)
2253 xrealloc (sect_opts
,
2255 * sizeof (struct sect_opt
)));
2260 /* It's an option (starting with '-') or it's an argument
2262 if (expecting_sec_name
)
2264 sect_opts
[section_index
].name
= arg
;
2265 expecting_sec_name
= 0;
2267 else if (expecting_sec_addr
)
2269 sect_opts
[section_index
].value
= arg
;
2270 expecting_sec_addr
= 0;
2271 if (++section_index
>= num_sect_opts
)
2274 sect_opts
= ((struct sect_opt
*)
2275 xrealloc (sect_opts
,
2277 * sizeof (struct sect_opt
)));
2280 else if (strcmp (arg
, "-readnow") == 0)
2281 flags
|= OBJF_READNOW
;
2282 else if (strcmp (arg
, "-s") == 0)
2284 expecting_sec_name
= 1;
2285 expecting_sec_addr
= 1;
2288 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2289 " [-readnow] [-s <secname> <addr>]*"));
2293 /* This command takes at least two arguments. The first one is a
2294 filename, and the second is the address where this file has been
2295 loaded. Abort now if this address hasn't been provided by the
2297 if (section_index
< 1)
2298 error (_("The address where %s has been loaded is missing"), filename
);
2300 /* Print the prompt for the query below. And save the arguments into
2301 a sect_addr_info structure to be passed around to other
2302 functions. We have to split this up into separate print
2303 statements because hex_string returns a local static
2306 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2307 section_addrs
= alloc_section_addr_info (section_index
);
2308 make_cleanup (xfree
, section_addrs
);
2309 for (i
= 0; i
< section_index
; i
++)
2312 char *val
= sect_opts
[i
].value
;
2313 char *sec
= sect_opts
[i
].name
;
2315 addr
= parse_and_eval_address (val
);
2317 /* Here we store the section offsets in the order they were
2318 entered on the command line. */
2319 section_addrs
->other
[sec_num
].name
= sec
;
2320 section_addrs
->other
[sec_num
].addr
= addr
;
2321 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2322 paddress (gdbarch
, addr
));
2325 /* The object's sections are initialized when a
2326 call is made to build_objfile_section_table (objfile).
2327 This happens in reread_symbols.
2328 At this point, we don't know what file type this is,
2329 so we can't determine what section names are valid. */
2331 section_addrs
->num_sections
= sec_num
;
2333 if (from_tty
&& (!query ("%s", "")))
2334 error (_("Not confirmed."));
2336 objf
= symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2337 section_addrs
, flags
);
2339 add_target_sections_of_objfile (objf
);
2341 /* Getting new symbols may change our opinion about what is
2343 reinit_frame_cache ();
2344 do_cleanups (my_cleanups
);
2348 /* This function removes a symbol file that was added via add-symbol-file. */
2351 remove_symbol_file_command (char *args
, int from_tty
)
2354 struct objfile
*objf
= NULL
;
2355 struct cleanup
*my_cleanups
;
2356 struct program_space
*pspace
= current_program_space
;
2357 struct gdbarch
*gdbarch
= get_current_arch ();
2362 error (_("remove-symbol-file: no symbol file provided"));
2364 my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2366 argv
= gdb_buildargv (args
);
2368 if (strcmp (argv
[0], "-a") == 0)
2370 /* Interpret the next argument as an address. */
2373 if (argv
[1] == NULL
)
2374 error (_("Missing address argument"));
2376 if (argv
[2] != NULL
)
2377 error (_("Junk after %s"), argv
[1]);
2379 addr
= parse_and_eval_address (argv
[1]);
2384 && objf
->flags
& OBJF_USERLOADED
2385 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2389 else if (argv
[0] != NULL
)
2391 /* Interpret the current argument as a file name. */
2394 if (argv
[1] != NULL
)
2395 error (_("Junk after %s"), argv
[0]);
2397 filename
= tilde_expand (argv
[0]);
2398 make_cleanup (xfree
, filename
);
2403 && objf
->flags
& OBJF_USERLOADED
2404 && objf
->pspace
== pspace
2405 && filename_cmp (filename
, objfile_name (objf
)) == 0)
2411 error (_("No symbol file found"));
2414 && !query (_("Remove symbol table from file \"%s\"? "),
2415 objfile_name (objf
)))
2416 error (_("Not confirmed."));
2418 free_objfile (objf
);
2419 clear_symtab_users (0);
2421 do_cleanups (my_cleanups
);
2424 typedef struct objfile
*objfilep
;
2426 DEF_VEC_P (objfilep
);
2428 /* Re-read symbols if a symbol-file has changed. */
2431 reread_symbols (void)
2433 struct objfile
*objfile
;
2435 struct stat new_statbuf
;
2437 VEC (objfilep
) *new_objfiles
= NULL
;
2438 struct cleanup
*all_cleanups
;
2440 all_cleanups
= make_cleanup (VEC_cleanup (objfilep
), &new_objfiles
);
2442 /* With the addition of shared libraries, this should be modified,
2443 the load time should be saved in the partial symbol tables, since
2444 different tables may come from different source files. FIXME.
2445 This routine should then walk down each partial symbol table
2446 and see if the symbol table that it originates from has been changed. */
2448 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2450 if (objfile
->obfd
== NULL
)
2453 /* Separate debug objfiles are handled in the main objfile. */
2454 if (objfile
->separate_debug_objfile_backlink
)
2457 /* If this object is from an archive (what you usually create with
2458 `ar', often called a `static library' on most systems, though
2459 a `shared library' on AIX is also an archive), then you should
2460 stat on the archive name, not member name. */
2461 if (objfile
->obfd
->my_archive
)
2462 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2464 res
= stat (objfile_name (objfile
), &new_statbuf
);
2467 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2468 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2469 objfile_name (objfile
));
2472 new_modtime
= new_statbuf
.st_mtime
;
2473 if (new_modtime
!= objfile
->mtime
)
2475 struct cleanup
*old_cleanups
;
2476 struct section_offsets
*offsets
;
2478 char *original_name
;
2480 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2481 objfile_name (objfile
));
2483 /* There are various functions like symbol_file_add,
2484 symfile_bfd_open, syms_from_objfile, etc., which might
2485 appear to do what we want. But they have various other
2486 effects which we *don't* want. So we just do stuff
2487 ourselves. We don't worry about mapped files (for one thing,
2488 any mapped file will be out of date). */
2490 /* If we get an error, blow away this objfile (not sure if
2491 that is the correct response for things like shared
2493 old_cleanups
= make_cleanup_free_objfile (objfile
);
2494 /* We need to do this whenever any symbols go away. */
2495 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2497 if (exec_bfd
!= NULL
2498 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2499 bfd_get_filename (exec_bfd
)) == 0)
2501 /* Reload EXEC_BFD without asking anything. */
2503 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2506 /* Keep the calls order approx. the same as in free_objfile. */
2508 /* Free the separate debug objfiles. It will be
2509 automatically recreated by sym_read. */
2510 free_objfile_separate_debug (objfile
);
2512 /* Remove any references to this objfile in the global
2514 preserve_values (objfile
);
2516 /* Nuke all the state that we will re-read. Much of the following
2517 code which sets things to NULL really is necessary to tell
2518 other parts of GDB that there is nothing currently there.
2520 Try to keep the freeing order compatible with free_objfile. */
2522 if (objfile
->sf
!= NULL
)
2524 (*objfile
->sf
->sym_finish
) (objfile
);
2527 clear_objfile_data (objfile
);
2529 /* Clean up any state BFD has sitting around. */
2531 struct bfd
*obfd
= objfile
->obfd
;
2532 char *obfd_filename
;
2534 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2535 /* Open the new BFD before freeing the old one, so that
2536 the filename remains live. */
2537 objfile
->obfd
= gdb_bfd_open_maybe_remote (obfd_filename
);
2538 if (objfile
->obfd
== NULL
)
2540 /* We have to make a cleanup and error here, rather
2541 than erroring later, because once we unref OBFD,
2542 OBFD_FILENAME will be freed. */
2543 make_cleanup_bfd_unref (obfd
);
2544 error (_("Can't open %s to read symbols."), obfd_filename
);
2546 gdb_bfd_unref (obfd
);
2549 original_name
= xstrdup (objfile
->original_name
);
2550 make_cleanup (xfree
, original_name
);
2552 /* bfd_openr sets cacheable to true, which is what we want. */
2553 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2554 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2555 bfd_errmsg (bfd_get_error ()));
2557 /* Save the offsets, we will nuke them with the rest of the
2559 num_offsets
= objfile
->num_sections
;
2560 offsets
= ((struct section_offsets
*)
2561 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2562 memcpy (offsets
, objfile
->section_offsets
,
2563 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2565 /* FIXME: Do we have to free a whole linked list, or is this
2567 if (objfile
->global_psymbols
.list
)
2568 xfree (objfile
->global_psymbols
.list
);
2569 memset (&objfile
->global_psymbols
, 0,
2570 sizeof (objfile
->global_psymbols
));
2571 if (objfile
->static_psymbols
.list
)
2572 xfree (objfile
->static_psymbols
.list
);
2573 memset (&objfile
->static_psymbols
, 0,
2574 sizeof (objfile
->static_psymbols
));
2576 /* Free the obstacks for non-reusable objfiles. */
2577 psymbol_bcache_free (objfile
->psymbol_cache
);
2578 objfile
->psymbol_cache
= psymbol_bcache_init ();
2579 obstack_free (&objfile
->objfile_obstack
, 0);
2580 objfile
->sections
= NULL
;
2581 objfile
->symtabs
= NULL
;
2582 objfile
->psymtabs
= NULL
;
2583 objfile
->psymtabs_addrmap
= NULL
;
2584 objfile
->free_psymtabs
= NULL
;
2585 objfile
->template_symbols
= NULL
;
2586 objfile
->msymbols
= NULL
;
2587 objfile
->minimal_symbol_count
= 0;
2588 memset (&objfile
->msymbol_hash
, 0,
2589 sizeof (objfile
->msymbol_hash
));
2590 memset (&objfile
->msymbol_demangled_hash
, 0,
2591 sizeof (objfile
->msymbol_demangled_hash
));
2593 /* obstack_init also initializes the obstack so it is
2594 empty. We could use obstack_specify_allocation but
2595 gdb_obstack.h specifies the alloc/dealloc functions. */
2596 obstack_init (&objfile
->objfile_obstack
);
2598 /* set_objfile_per_bfd potentially allocates the per-bfd
2599 data on the objfile's obstack (if sharing data across
2600 multiple users is not possible), so it's important to
2601 do it *after* the obstack has been initialized. */
2602 set_objfile_per_bfd (objfile
);
2604 objfile
->original_name
= obstack_copy0 (&objfile
->objfile_obstack
,
2606 strlen (original_name
));
2608 /* Reset the sym_fns pointer. The ELF reader can change it
2609 based on whether .gdb_index is present, and we need it to
2610 start over. PR symtab/15885 */
2611 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2613 build_objfile_section_table (objfile
);
2614 terminate_minimal_symbol_table (objfile
);
2616 /* We use the same section offsets as from last time. I'm not
2617 sure whether that is always correct for shared libraries. */
2618 objfile
->section_offsets
= (struct section_offsets
*)
2619 obstack_alloc (&objfile
->objfile_obstack
,
2620 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2621 memcpy (objfile
->section_offsets
, offsets
,
2622 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2623 objfile
->num_sections
= num_offsets
;
2625 /* What the hell is sym_new_init for, anyway? The concept of
2626 distinguishing between the main file and additional files
2627 in this way seems rather dubious. */
2628 if (objfile
== symfile_objfile
)
2630 (*objfile
->sf
->sym_new_init
) (objfile
);
2633 (*objfile
->sf
->sym_init
) (objfile
);
2634 clear_complaints (&symfile_complaints
, 1, 1);
2636 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2637 read_symbols (objfile
, 0);
2639 if (!objfile_has_symbols (objfile
))
2642 printf_unfiltered (_("(no debugging symbols found)\n"));
2646 /* We're done reading the symbol file; finish off complaints. */
2647 clear_complaints (&symfile_complaints
, 0, 1);
2649 /* Getting new symbols may change our opinion about what is
2652 reinit_frame_cache ();
2654 /* Discard cleanups as symbol reading was successful. */
2655 discard_cleanups (old_cleanups
);
2657 /* If the mtime has changed between the time we set new_modtime
2658 and now, we *want* this to be out of date, so don't call stat
2660 objfile
->mtime
= new_modtime
;
2661 init_entry_point_info (objfile
);
2663 VEC_safe_push (objfilep
, new_objfiles
, objfile
);
2671 /* Notify objfiles that we've modified objfile sections. */
2672 objfiles_changed ();
2674 clear_symtab_users (0);
2676 /* clear_objfile_data for each objfile was called before freeing it and
2677 observer_notify_new_objfile (NULL) has been called by
2678 clear_symtab_users above. Notify the new files now. */
2679 for (ix
= 0; VEC_iterate (objfilep
, new_objfiles
, ix
, objfile
); ix
++)
2680 observer_notify_new_objfile (objfile
);
2682 /* At least one objfile has changed, so we can consider that
2683 the executable we're debugging has changed too. */
2684 observer_notify_executable_changed ();
2687 do_cleanups (all_cleanups
);
2698 static filename_language
*filename_language_table
;
2699 static int fl_table_size
, fl_table_next
;
2702 add_filename_language (char *ext
, enum language lang
)
2704 if (fl_table_next
>= fl_table_size
)
2706 fl_table_size
+= 10;
2707 filename_language_table
=
2708 xrealloc (filename_language_table
,
2709 fl_table_size
* sizeof (*filename_language_table
));
2712 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2713 filename_language_table
[fl_table_next
].lang
= lang
;
2717 static char *ext_args
;
2719 show_ext_args (struct ui_file
*file
, int from_tty
,
2720 struct cmd_list_element
*c
, const char *value
)
2722 fprintf_filtered (file
,
2723 _("Mapping between filename extension "
2724 "and source language is \"%s\".\n"),
2729 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2732 char *cp
= ext_args
;
2735 /* First arg is filename extension, starting with '.' */
2737 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2739 /* Find end of first arg. */
2740 while (*cp
&& !isspace (*cp
))
2744 error (_("'%s': two arguments required -- "
2745 "filename extension and language"),
2748 /* Null-terminate first arg. */
2751 /* Find beginning of second arg, which should be a source language. */
2752 cp
= skip_spaces (cp
);
2755 error (_("'%s': two arguments required -- "
2756 "filename extension and language"),
2759 /* Lookup the language from among those we know. */
2760 lang
= language_enum (cp
);
2762 /* Now lookup the filename extension: do we already know it? */
2763 for (i
= 0; i
< fl_table_next
; i
++)
2764 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2767 if (i
>= fl_table_next
)
2769 /* New file extension. */
2770 add_filename_language (ext_args
, lang
);
2774 /* Redefining a previously known filename extension. */
2777 /* query ("Really make files of type %s '%s'?", */
2778 /* ext_args, language_str (lang)); */
2780 xfree (filename_language_table
[i
].ext
);
2781 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2782 filename_language_table
[i
].lang
= lang
;
2787 info_ext_lang_command (char *args
, int from_tty
)
2791 printf_filtered (_("Filename extensions and the languages they represent:"));
2792 printf_filtered ("\n\n");
2793 for (i
= 0; i
< fl_table_next
; i
++)
2794 printf_filtered ("\t%s\t- %s\n",
2795 filename_language_table
[i
].ext
,
2796 language_str (filename_language_table
[i
].lang
));
2800 init_filename_language_table (void)
2802 if (fl_table_size
== 0) /* Protect against repetition. */
2806 filename_language_table
=
2807 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2808 add_filename_language (".c", language_c
);
2809 add_filename_language (".d", language_d
);
2810 add_filename_language (".C", language_cplus
);
2811 add_filename_language (".cc", language_cplus
);
2812 add_filename_language (".cp", language_cplus
);
2813 add_filename_language (".cpp", language_cplus
);
2814 add_filename_language (".cxx", language_cplus
);
2815 add_filename_language (".c++", language_cplus
);
2816 add_filename_language (".java", language_java
);
2817 add_filename_language (".class", language_java
);
2818 add_filename_language (".m", language_objc
);
2819 add_filename_language (".f", language_fortran
);
2820 add_filename_language (".F", language_fortran
);
2821 add_filename_language (".for", language_fortran
);
2822 add_filename_language (".FOR", language_fortran
);
2823 add_filename_language (".ftn", language_fortran
);
2824 add_filename_language (".FTN", language_fortran
);
2825 add_filename_language (".fpp", language_fortran
);
2826 add_filename_language (".FPP", language_fortran
);
2827 add_filename_language (".f90", language_fortran
);
2828 add_filename_language (".F90", language_fortran
);
2829 add_filename_language (".f95", language_fortran
);
2830 add_filename_language (".F95", language_fortran
);
2831 add_filename_language (".f03", language_fortran
);
2832 add_filename_language (".F03", language_fortran
);
2833 add_filename_language (".f08", language_fortran
);
2834 add_filename_language (".F08", language_fortran
);
2835 add_filename_language (".s", language_asm
);
2836 add_filename_language (".sx", language_asm
);
2837 add_filename_language (".S", language_asm
);
2838 add_filename_language (".pas", language_pascal
);
2839 add_filename_language (".p", language_pascal
);
2840 add_filename_language (".pp", language_pascal
);
2841 add_filename_language (".adb", language_ada
);
2842 add_filename_language (".ads", language_ada
);
2843 add_filename_language (".a", language_ada
);
2844 add_filename_language (".ada", language_ada
);
2845 add_filename_language (".dg", language_ada
);
2850 deduce_language_from_filename (const char *filename
)
2855 if (filename
!= NULL
)
2856 if ((cp
= strrchr (filename
, '.')) != NULL
)
2857 for (i
= 0; i
< fl_table_next
; i
++)
2858 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2859 return filename_language_table
[i
].lang
;
2861 return language_unknown
;
2866 Allocate and partly initialize a new symbol table. Return a pointer
2867 to it. error() if no space.
2869 Caller must set these fields:
2878 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2880 struct symtab
*symtab
;
2882 symtab
= (struct symtab
*)
2883 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2884 memset (symtab
, 0, sizeof (*symtab
));
2885 symtab
->filename
= bcache (filename
, strlen (filename
) + 1,
2886 objfile
->per_bfd
->filename_cache
);
2887 symtab
->fullname
= NULL
;
2888 symtab
->language
= deduce_language_from_filename (filename
);
2889 symtab
->debugformat
= "unknown";
2891 /* Hook it to the objfile it comes from. */
2893 symtab
->objfile
= objfile
;
2894 symtab
->next
= objfile
->symtabs
;
2895 objfile
->symtabs
= symtab
;
2897 /* This can be very verbose with lots of headers.
2898 Only print at higher debug levels. */
2899 if (symtab_create_debug
>= 2)
2901 /* Be a bit clever with debugging messages, and don't print objfile
2902 every time, only when it changes. */
2903 static char *last_objfile_name
= NULL
;
2905 if (last_objfile_name
== NULL
2906 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2908 xfree (last_objfile_name
);
2909 last_objfile_name
= xstrdup (objfile_name (objfile
));
2910 fprintf_unfiltered (gdb_stdlog
,
2911 "Creating one or more symtabs for objfile %s ...\n",
2914 fprintf_unfiltered (gdb_stdlog
,
2915 "Created symtab %s for module %s.\n",
2916 host_address_to_string (symtab
), filename
);
2923 /* Reset all data structures in gdb which may contain references to symbol
2924 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2927 clear_symtab_users (int add_flags
)
2929 /* Someday, we should do better than this, by only blowing away
2930 the things that really need to be blown. */
2932 /* Clear the "current" symtab first, because it is no longer valid.
2933 breakpoint_re_set may try to access the current symtab. */
2934 clear_current_source_symtab_and_line ();
2937 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2938 breakpoint_re_set ();
2939 clear_last_displayed_sal ();
2940 clear_pc_function_cache ();
2941 observer_notify_new_objfile (NULL
);
2943 /* Clear globals which might have pointed into a removed objfile.
2944 FIXME: It's not clear which of these are supposed to persist
2945 between expressions and which ought to be reset each time. */
2946 expression_context_block
= NULL
;
2947 innermost_block
= NULL
;
2949 /* Varobj may refer to old symbols, perform a cleanup. */
2950 varobj_invalidate ();
2955 clear_symtab_users_cleanup (void *ignore
)
2957 clear_symtab_users (0);
2961 The following code implements an abstraction for debugging overlay sections.
2963 The target model is as follows:
2964 1) The gnu linker will permit multiple sections to be mapped into the
2965 same VMA, each with its own unique LMA (or load address).
2966 2) It is assumed that some runtime mechanism exists for mapping the
2967 sections, one by one, from the load address into the VMA address.
2968 3) This code provides a mechanism for gdb to keep track of which
2969 sections should be considered to be mapped from the VMA to the LMA.
2970 This information is used for symbol lookup, and memory read/write.
2971 For instance, if a section has been mapped then its contents
2972 should be read from the VMA, otherwise from the LMA.
2974 Two levels of debugger support for overlays are available. One is
2975 "manual", in which the debugger relies on the user to tell it which
2976 overlays are currently mapped. This level of support is
2977 implemented entirely in the core debugger, and the information about
2978 whether a section is mapped is kept in the objfile->obj_section table.
2980 The second level of support is "automatic", and is only available if
2981 the target-specific code provides functionality to read the target's
2982 overlay mapping table, and translate its contents for the debugger
2983 (by updating the mapped state information in the obj_section tables).
2985 The interface is as follows:
2987 overlay map <name> -- tell gdb to consider this section mapped
2988 overlay unmap <name> -- tell gdb to consider this section unmapped
2989 overlay list -- list the sections that GDB thinks are mapped
2990 overlay read-target -- get the target's state of what's mapped
2991 overlay off/manual/auto -- set overlay debugging state
2992 Functional interface:
2993 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2994 section, return that section.
2995 find_pc_overlay(pc): find any overlay section that contains
2996 the pc, either in its VMA or its LMA
2997 section_is_mapped(sect): true if overlay is marked as mapped
2998 section_is_overlay(sect): true if section's VMA != LMA
2999 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3000 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3001 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3002 overlay_mapped_address(...): map an address from section's LMA to VMA
3003 overlay_unmapped_address(...): map an address from section's VMA to LMA
3004 symbol_overlayed_address(...): Return a "current" address for symbol:
3005 either in VMA or LMA depending on whether
3006 the symbol's section is currently mapped. */
3008 /* Overlay debugging state: */
3010 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3011 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
3013 /* Function: section_is_overlay (SECTION)
3014 Returns true if SECTION has VMA not equal to LMA, ie.
3015 SECTION is loaded at an address different from where it will "run". */
3018 section_is_overlay (struct obj_section
*section
)
3020 if (overlay_debugging
&& section
)
3022 bfd
*abfd
= section
->objfile
->obfd
;
3023 asection
*bfd_section
= section
->the_bfd_section
;
3025 if (bfd_section_lma (abfd
, bfd_section
) != 0
3026 && bfd_section_lma (abfd
, bfd_section
)
3027 != bfd_section_vma (abfd
, bfd_section
))
3034 /* Function: overlay_invalidate_all (void)
3035 Invalidate the mapped state of all overlay sections (mark it as stale). */
3038 overlay_invalidate_all (void)
3040 struct objfile
*objfile
;
3041 struct obj_section
*sect
;
3043 ALL_OBJSECTIONS (objfile
, sect
)
3044 if (section_is_overlay (sect
))
3045 sect
->ovly_mapped
= -1;
3048 /* Function: section_is_mapped (SECTION)
3049 Returns true if section is an overlay, and is currently mapped.
3051 Access to the ovly_mapped flag is restricted to this function, so
3052 that we can do automatic update. If the global flag
3053 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3054 overlay_invalidate_all. If the mapped state of the particular
3055 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3058 section_is_mapped (struct obj_section
*osect
)
3060 struct gdbarch
*gdbarch
;
3062 if (osect
== 0 || !section_is_overlay (osect
))
3065 switch (overlay_debugging
)
3069 return 0; /* overlay debugging off */
3070 case ovly_auto
: /* overlay debugging automatic */
3071 /* Unles there is a gdbarch_overlay_update function,
3072 there's really nothing useful to do here (can't really go auto). */
3073 gdbarch
= get_objfile_arch (osect
->objfile
);
3074 if (gdbarch_overlay_update_p (gdbarch
))
3076 if (overlay_cache_invalid
)
3078 overlay_invalidate_all ();
3079 overlay_cache_invalid
= 0;
3081 if (osect
->ovly_mapped
== -1)
3082 gdbarch_overlay_update (gdbarch
, osect
);
3084 /* fall thru to manual case */
3085 case ovly_on
: /* overlay debugging manual */
3086 return osect
->ovly_mapped
== 1;
3090 /* Function: pc_in_unmapped_range
3091 If PC falls into the lma range of SECTION, return true, else false. */
3094 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3096 if (section_is_overlay (section
))
3098 bfd
*abfd
= section
->objfile
->obfd
;
3099 asection
*bfd_section
= section
->the_bfd_section
;
3101 /* We assume the LMA is relocated by the same offset as the VMA. */
3102 bfd_vma size
= bfd_get_section_size (bfd_section
);
3103 CORE_ADDR offset
= obj_section_offset (section
);
3105 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3106 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3113 /* Function: pc_in_mapped_range
3114 If PC falls into the vma range of SECTION, return true, else false. */
3117 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3119 if (section_is_overlay (section
))
3121 if (obj_section_addr (section
) <= pc
3122 && pc
< obj_section_endaddr (section
))
3129 /* Return true if the mapped ranges of sections A and B overlap, false
3133 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3135 CORE_ADDR a_start
= obj_section_addr (a
);
3136 CORE_ADDR a_end
= obj_section_endaddr (a
);
3137 CORE_ADDR b_start
= obj_section_addr (b
);
3138 CORE_ADDR b_end
= obj_section_endaddr (b
);
3140 return (a_start
< b_end
&& b_start
< a_end
);
3143 /* Function: overlay_unmapped_address (PC, SECTION)
3144 Returns the address corresponding to PC in the unmapped (load) range.
3145 May be the same as PC. */
3148 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3150 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3152 bfd
*abfd
= section
->objfile
->obfd
;
3153 asection
*bfd_section
= section
->the_bfd_section
;
3155 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3156 - bfd_section_vma (abfd
, bfd_section
);
3162 /* Function: overlay_mapped_address (PC, SECTION)
3163 Returns the address corresponding to PC in the mapped (runtime) range.
3164 May be the same as PC. */
3167 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3169 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3171 bfd
*abfd
= section
->objfile
->obfd
;
3172 asection
*bfd_section
= section
->the_bfd_section
;
3174 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3175 - bfd_section_lma (abfd
, bfd_section
);
3181 /* Function: symbol_overlayed_address
3182 Return one of two addresses (relative to the VMA or to the LMA),
3183 depending on whether the section is mapped or not. */
3186 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3188 if (overlay_debugging
)
3190 /* If the symbol has no section, just return its regular address. */
3193 /* If the symbol's section is not an overlay, just return its
3195 if (!section_is_overlay (section
))
3197 /* If the symbol's section is mapped, just return its address. */
3198 if (section_is_mapped (section
))
3201 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3202 * then return its LOADED address rather than its vma address!!
3204 return overlay_unmapped_address (address
, section
);
3209 /* Function: find_pc_overlay (PC)
3210 Return the best-match overlay section for PC:
3211 If PC matches a mapped overlay section's VMA, return that section.
3212 Else if PC matches an unmapped section's VMA, return that section.
3213 Else if PC matches an unmapped section's LMA, return that section. */
3215 struct obj_section
*
3216 find_pc_overlay (CORE_ADDR pc
)
3218 struct objfile
*objfile
;
3219 struct obj_section
*osect
, *best_match
= NULL
;
3221 if (overlay_debugging
)
3222 ALL_OBJSECTIONS (objfile
, osect
)
3223 if (section_is_overlay (osect
))
3225 if (pc_in_mapped_range (pc
, osect
))
3227 if (section_is_mapped (osect
))
3232 else if (pc_in_unmapped_range (pc
, osect
))
3238 /* Function: find_pc_mapped_section (PC)
3239 If PC falls into the VMA address range of an overlay section that is
3240 currently marked as MAPPED, return that section. Else return NULL. */
3242 struct obj_section
*
3243 find_pc_mapped_section (CORE_ADDR pc
)
3245 struct objfile
*objfile
;
3246 struct obj_section
*osect
;
3248 if (overlay_debugging
)
3249 ALL_OBJSECTIONS (objfile
, osect
)
3250 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3256 /* Function: list_overlays_command
3257 Print a list of mapped sections and their PC ranges. */
3260 list_overlays_command (char *args
, int from_tty
)
3263 struct objfile
*objfile
;
3264 struct obj_section
*osect
;
3266 if (overlay_debugging
)
3267 ALL_OBJSECTIONS (objfile
, osect
)
3268 if (section_is_mapped (osect
))
3270 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3275 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3276 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3277 size
= bfd_get_section_size (osect
->the_bfd_section
);
3278 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3280 printf_filtered ("Section %s, loaded at ", name
);
3281 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3282 puts_filtered (" - ");
3283 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3284 printf_filtered (", mapped at ");
3285 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3286 puts_filtered (" - ");
3287 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3288 puts_filtered ("\n");
3293 printf_filtered (_("No sections are mapped.\n"));
3296 /* Function: map_overlay_command
3297 Mark the named section as mapped (ie. residing at its VMA address). */
3300 map_overlay_command (char *args
, int from_tty
)
3302 struct objfile
*objfile
, *objfile2
;
3303 struct obj_section
*sec
, *sec2
;
3305 if (!overlay_debugging
)
3306 error (_("Overlay debugging not enabled. Use "
3307 "either the 'overlay auto' or\n"
3308 "the 'overlay manual' command."));
3310 if (args
== 0 || *args
== 0)
3311 error (_("Argument required: name of an overlay section"));
3313 /* First, find a section matching the user supplied argument. */
3314 ALL_OBJSECTIONS (objfile
, sec
)
3315 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3317 /* Now, check to see if the section is an overlay. */
3318 if (!section_is_overlay (sec
))
3319 continue; /* not an overlay section */
3321 /* Mark the overlay as "mapped". */
3322 sec
->ovly_mapped
= 1;
3324 /* Next, make a pass and unmap any sections that are
3325 overlapped by this new section: */
3326 ALL_OBJSECTIONS (objfile2
, sec2
)
3327 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3330 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3331 bfd_section_name (objfile
->obfd
,
3332 sec2
->the_bfd_section
));
3333 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3337 error (_("No overlay section called %s"), args
);
3340 /* Function: unmap_overlay_command
3341 Mark the overlay section as unmapped
3342 (ie. resident in its LMA address range, rather than the VMA range). */
3345 unmap_overlay_command (char *args
, int from_tty
)
3347 struct objfile
*objfile
;
3348 struct obj_section
*sec
;
3350 if (!overlay_debugging
)
3351 error (_("Overlay debugging not enabled. "
3352 "Use either the 'overlay auto' or\n"
3353 "the 'overlay manual' command."));
3355 if (args
== 0 || *args
== 0)
3356 error (_("Argument required: name of an overlay section"));
3358 /* First, find a section matching the user supplied argument. */
3359 ALL_OBJSECTIONS (objfile
, sec
)
3360 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3362 if (!sec
->ovly_mapped
)
3363 error (_("Section %s is not mapped"), args
);
3364 sec
->ovly_mapped
= 0;
3367 error (_("No overlay section called %s"), args
);
3370 /* Function: overlay_auto_command
3371 A utility command to turn on overlay debugging.
3372 Possibly this should be done via a set/show command. */
3375 overlay_auto_command (char *args
, int from_tty
)
3377 overlay_debugging
= ovly_auto
;
3378 enable_overlay_breakpoints ();
3380 printf_unfiltered (_("Automatic overlay debugging enabled."));
3383 /* Function: overlay_manual_command
3384 A utility command to turn on overlay debugging.
3385 Possibly this should be done via a set/show command. */
3388 overlay_manual_command (char *args
, int from_tty
)
3390 overlay_debugging
= ovly_on
;
3391 disable_overlay_breakpoints ();
3393 printf_unfiltered (_("Overlay debugging enabled."));
3396 /* Function: overlay_off_command
3397 A utility command to turn on overlay debugging.
3398 Possibly this should be done via a set/show command. */
3401 overlay_off_command (char *args
, int from_tty
)
3403 overlay_debugging
= ovly_off
;
3404 disable_overlay_breakpoints ();
3406 printf_unfiltered (_("Overlay debugging disabled."));
3410 overlay_load_command (char *args
, int from_tty
)
3412 struct gdbarch
*gdbarch
= get_current_arch ();
3414 if (gdbarch_overlay_update_p (gdbarch
))
3415 gdbarch_overlay_update (gdbarch
, NULL
);
3417 error (_("This target does not know how to read its overlay state."));
3420 /* Function: overlay_command
3421 A place-holder for a mis-typed command. */
3423 /* Command list chain containing all defined "overlay" subcommands. */
3424 static struct cmd_list_element
*overlaylist
;
3427 overlay_command (char *args
, int from_tty
)
3430 ("\"overlay\" must be followed by the name of an overlay command.\n");
3431 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3434 /* Target Overlays for the "Simplest" overlay manager:
3436 This is GDB's default target overlay layer. It works with the
3437 minimal overlay manager supplied as an example by Cygnus. The
3438 entry point is via a function pointer "gdbarch_overlay_update",
3439 so targets that use a different runtime overlay manager can
3440 substitute their own overlay_update function and take over the
3443 The overlay_update function pokes around in the target's data structures
3444 to see what overlays are mapped, and updates GDB's overlay mapping with
3447 In this simple implementation, the target data structures are as follows:
3448 unsigned _novlys; /# number of overlay sections #/
3449 unsigned _ovly_table[_novlys][4] = {
3450 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3451 {..., ..., ..., ...},
3453 unsigned _novly_regions; /# number of overlay regions #/
3454 unsigned _ovly_region_table[_novly_regions][3] = {
3455 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3458 These functions will attempt to update GDB's mappedness state in the
3459 symbol section table, based on the target's mappedness state.
3461 To do this, we keep a cached copy of the target's _ovly_table, and
3462 attempt to detect when the cached copy is invalidated. The main
3463 entry point is "simple_overlay_update(SECT), which looks up SECT in
3464 the cached table and re-reads only the entry for that section from
3465 the target (whenever possible). */
3467 /* Cached, dynamically allocated copies of the target data structures: */
3468 static unsigned (*cache_ovly_table
)[4] = 0;
3469 static unsigned cache_novlys
= 0;
3470 static CORE_ADDR cache_ovly_table_base
= 0;
3473 VMA
, SIZE
, LMA
, MAPPED
3476 /* Throw away the cached copy of _ovly_table. */
3479 simple_free_overlay_table (void)
3481 if (cache_ovly_table
)
3482 xfree (cache_ovly_table
);
3484 cache_ovly_table
= NULL
;
3485 cache_ovly_table_base
= 0;
3488 /* Read an array of ints of size SIZE from the target into a local buffer.
3489 Convert to host order. int LEN is number of ints. */
3492 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3493 int len
, int size
, enum bfd_endian byte_order
)
3495 /* FIXME (alloca): Not safe if array is very large. */
3496 gdb_byte
*buf
= alloca (len
* size
);
3499 read_memory (memaddr
, buf
, len
* size
);
3500 for (i
= 0; i
< len
; i
++)
3501 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3504 /* Find and grab a copy of the target _ovly_table
3505 (and _novlys, which is needed for the table's size). */
3508 simple_read_overlay_table (void)
3510 struct minimal_symbol
*novlys_msym
;
3511 struct bound_minimal_symbol ovly_table_msym
;
3512 struct gdbarch
*gdbarch
;
3514 enum bfd_endian byte_order
;
3516 simple_free_overlay_table ();
3517 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3520 error (_("Error reading inferior's overlay table: "
3521 "couldn't find `_novlys' variable\n"
3522 "in inferior. Use `overlay manual' mode."));
3526 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3527 if (! ovly_table_msym
.minsym
)
3529 error (_("Error reading inferior's overlay table: couldn't find "
3530 "`_ovly_table' array\n"
3531 "in inferior. Use `overlay manual' mode."));
3535 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3536 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3537 byte_order
= gdbarch_byte_order (gdbarch
);
3539 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3542 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3543 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
.minsym
);
3544 read_target_long_array (cache_ovly_table_base
,
3545 (unsigned int *) cache_ovly_table
,
3546 cache_novlys
* 4, word_size
, byte_order
);
3548 return 1; /* SUCCESS */
3551 /* Function: simple_overlay_update_1
3552 A helper function for simple_overlay_update. Assuming a cached copy
3553 of _ovly_table exists, look through it to find an entry whose vma,
3554 lma and size match those of OSECT. Re-read the entry and make sure
3555 it still matches OSECT (else the table may no longer be valid).
3556 Set OSECT's mapped state to match the entry. Return: 1 for
3557 success, 0 for failure. */
3560 simple_overlay_update_1 (struct obj_section
*osect
)
3563 bfd
*obfd
= osect
->objfile
->obfd
;
3564 asection
*bsect
= osect
->the_bfd_section
;
3565 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3566 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3567 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3569 size
= bfd_get_section_size (osect
->the_bfd_section
);
3570 for (i
= 0; i
< cache_novlys
; i
++)
3571 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3572 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3573 /* && cache_ovly_table[i][SIZE] == size */ )
3575 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3576 (unsigned int *) cache_ovly_table
[i
],
3577 4, word_size
, byte_order
);
3578 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3579 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3580 /* && cache_ovly_table[i][SIZE] == size */ )
3582 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3585 else /* Warning! Warning! Target's ovly table has changed! */
3591 /* Function: simple_overlay_update
3592 If OSECT is NULL, then update all sections' mapped state
3593 (after re-reading the entire target _ovly_table).
3594 If OSECT is non-NULL, then try to find a matching entry in the
3595 cached ovly_table and update only OSECT's mapped state.
3596 If a cached entry can't be found or the cache isn't valid, then
3597 re-read the entire cache, and go ahead and update all sections. */
3600 simple_overlay_update (struct obj_section
*osect
)
3602 struct objfile
*objfile
;
3604 /* Were we given an osect to look up? NULL means do all of them. */
3606 /* Have we got a cached copy of the target's overlay table? */
3607 if (cache_ovly_table
!= NULL
)
3609 /* Does its cached location match what's currently in the
3611 struct minimal_symbol
*minsym
3612 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3615 error (_("Error reading inferior's overlay table: couldn't "
3616 "find `_ovly_table' array\n"
3617 "in inferior. Use `overlay manual' mode."));
3619 if (cache_ovly_table_base
== SYMBOL_VALUE_ADDRESS (minsym
))
3620 /* Then go ahead and try to look up this single section in
3622 if (simple_overlay_update_1 (osect
))
3623 /* Found it! We're done. */
3627 /* Cached table no good: need to read the entire table anew.
3628 Or else we want all the sections, in which case it's actually
3629 more efficient to read the whole table in one block anyway. */
3631 if (! simple_read_overlay_table ())
3634 /* Now may as well update all sections, even if only one was requested. */
3635 ALL_OBJSECTIONS (objfile
, osect
)
3636 if (section_is_overlay (osect
))
3639 bfd
*obfd
= osect
->objfile
->obfd
;
3640 asection
*bsect
= osect
->the_bfd_section
;
3642 size
= bfd_get_section_size (bsect
);
3643 for (i
= 0; i
< cache_novlys
; i
++)
3644 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3645 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3646 /* && cache_ovly_table[i][SIZE] == size */ )
3647 { /* obj_section matches i'th entry in ovly_table. */
3648 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3649 break; /* finished with inner for loop: break out. */
3654 /* Set the output sections and output offsets for section SECTP in
3655 ABFD. The relocation code in BFD will read these offsets, so we
3656 need to be sure they're initialized. We map each section to itself,
3657 with no offset; this means that SECTP->vma will be honored. */
3660 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3662 sectp
->output_section
= sectp
;
3663 sectp
->output_offset
= 0;
3666 /* Default implementation for sym_relocate. */
3669 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3672 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3674 bfd
*abfd
= sectp
->owner
;
3676 /* We're only interested in sections with relocation
3678 if ((sectp
->flags
& SEC_RELOC
) == 0)
3681 /* We will handle section offsets properly elsewhere, so relocate as if
3682 all sections begin at 0. */
3683 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3685 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3688 /* Relocate the contents of a debug section SECTP in ABFD. The
3689 contents are stored in BUF if it is non-NULL, or returned in a
3690 malloc'd buffer otherwise.
3692 For some platforms and debug info formats, shared libraries contain
3693 relocations against the debug sections (particularly for DWARF-2;
3694 one affected platform is PowerPC GNU/Linux, although it depends on
3695 the version of the linker in use). Also, ELF object files naturally
3696 have unresolved relocations for their debug sections. We need to apply
3697 the relocations in order to get the locations of symbols correct.
3698 Another example that may require relocation processing, is the
3699 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3703 symfile_relocate_debug_section (struct objfile
*objfile
,
3704 asection
*sectp
, bfd_byte
*buf
)
3706 gdb_assert (objfile
->sf
->sym_relocate
);
3708 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3711 struct symfile_segment_data
*
3712 get_symfile_segment_data (bfd
*abfd
)
3714 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3719 return sf
->sym_segments (abfd
);
3723 free_symfile_segment_data (struct symfile_segment_data
*data
)
3725 xfree (data
->segment_bases
);
3726 xfree (data
->segment_sizes
);
3727 xfree (data
->segment_info
);
3732 - DATA, containing segment addresses from the object file ABFD, and
3733 the mapping from ABFD's sections onto the segments that own them,
3735 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3736 segment addresses reported by the target,
3737 store the appropriate offsets for each section in OFFSETS.
3739 If there are fewer entries in SEGMENT_BASES than there are segments
3740 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3742 If there are more entries, then ignore the extra. The target may
3743 not be able to distinguish between an empty data segment and a
3744 missing data segment; a missing text segment is less plausible. */
3747 symfile_map_offsets_to_segments (bfd
*abfd
,
3748 const struct symfile_segment_data
*data
,
3749 struct section_offsets
*offsets
,
3750 int num_segment_bases
,
3751 const CORE_ADDR
*segment_bases
)
3756 /* It doesn't make sense to call this function unless you have some
3757 segment base addresses. */
3758 gdb_assert (num_segment_bases
> 0);
3760 /* If we do not have segment mappings for the object file, we
3761 can not relocate it by segments. */
3762 gdb_assert (data
!= NULL
);
3763 gdb_assert (data
->num_segments
> 0);
3765 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3767 int which
= data
->segment_info
[i
];
3769 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3771 /* Don't bother computing offsets for sections that aren't
3772 loaded as part of any segment. */
3776 /* Use the last SEGMENT_BASES entry as the address of any extra
3777 segments mentioned in DATA->segment_info. */
3778 if (which
> num_segment_bases
)
3779 which
= num_segment_bases
;
3781 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3782 - data
->segment_bases
[which
- 1]);
3789 symfile_find_segment_sections (struct objfile
*objfile
)
3791 bfd
*abfd
= objfile
->obfd
;
3794 struct symfile_segment_data
*data
;
3796 data
= get_symfile_segment_data (objfile
->obfd
);
3800 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3802 free_symfile_segment_data (data
);
3806 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3808 int which
= data
->segment_info
[i
];
3812 if (objfile
->sect_index_text
== -1)
3813 objfile
->sect_index_text
= sect
->index
;
3815 if (objfile
->sect_index_rodata
== -1)
3816 objfile
->sect_index_rodata
= sect
->index
;
3818 else if (which
== 2)
3820 if (objfile
->sect_index_data
== -1)
3821 objfile
->sect_index_data
= sect
->index
;
3823 if (objfile
->sect_index_bss
== -1)
3824 objfile
->sect_index_bss
= sect
->index
;
3828 free_symfile_segment_data (data
);
3831 /* Listen for free_objfile events. */
3834 symfile_free_objfile (struct objfile
*objfile
)
3836 /* Remove the target sections of user-added objfiles. */
3837 if (objfile
!= 0 && objfile
->flags
& OBJF_USERLOADED
)
3838 remove_target_sections ((void *) objfile
);
3842 _initialize_symfile (void)
3844 struct cmd_list_element
*c
;
3846 observer_attach_free_objfile (symfile_free_objfile
);
3848 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3849 Load symbol table from executable file FILE.\n\
3850 The `file' command can also load symbol tables, as well as setting the file\n\
3851 to execute."), &cmdlist
);
3852 set_cmd_completer (c
, filename_completer
);
3854 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3855 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3856 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3857 ...]\nADDR is the starting address of the file's text.\n\
3858 The optional arguments are section-name section-address pairs and\n\
3859 should be specified if the data and bss segments are not contiguous\n\
3860 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3862 set_cmd_completer (c
, filename_completer
);
3864 c
= add_cmd ("remove-symbol-file", class_files
,
3865 remove_symbol_file_command
, _("\
3866 Remove a symbol file added via the add-symbol-file command.\n\
3867 Usage: remove-symbol-file FILENAME\n\
3868 remove-symbol-file -a ADDRESS\n\
3869 The file to remove can be identified by its filename or by an address\n\
3870 that lies within the boundaries of this symbol file in memory."),
3873 c
= add_cmd ("load", class_files
, load_command
, _("\
3874 Dynamically load FILE into the running program, and record its symbols\n\
3875 for access from GDB.\n\
3876 A load OFFSET may also be given."), &cmdlist
);
3877 set_cmd_completer (c
, filename_completer
);
3879 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3880 _("Commands for debugging overlays."), &overlaylist
,
3881 "overlay ", 0, &cmdlist
);
3883 add_com_alias ("ovly", "overlay", class_alias
, 1);
3884 add_com_alias ("ov", "overlay", class_alias
, 1);
3886 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3887 _("Assert that an overlay section is mapped."), &overlaylist
);
3889 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3890 _("Assert that an overlay section is unmapped."), &overlaylist
);
3892 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3893 _("List mappings of overlay sections."), &overlaylist
);
3895 add_cmd ("manual", class_support
, overlay_manual_command
,
3896 _("Enable overlay debugging."), &overlaylist
);
3897 add_cmd ("off", class_support
, overlay_off_command
,
3898 _("Disable overlay debugging."), &overlaylist
);
3899 add_cmd ("auto", class_support
, overlay_auto_command
,
3900 _("Enable automatic overlay debugging."), &overlaylist
);
3901 add_cmd ("load-target", class_support
, overlay_load_command
,
3902 _("Read the overlay mapping state from the target."), &overlaylist
);
3904 /* Filename extension to source language lookup table: */
3905 init_filename_language_table ();
3906 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3908 Set mapping between filename extension and source language."), _("\
3909 Show mapping between filename extension and source language."), _("\
3910 Usage: set extension-language .foo bar"),
3911 set_ext_lang_command
,
3913 &setlist
, &showlist
);
3915 add_info ("extensions", info_ext_lang_command
,
3916 _("All filename extensions associated with a source language."));
3918 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3919 &debug_file_directory
, _("\
3920 Set the directories where separate debug symbols are searched for."), _("\
3921 Show the directories where separate debug symbols are searched for."), _("\
3922 Separate debug symbols are first searched for in the same\n\
3923 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3924 and lastly at the path of the directory of the binary with\n\
3925 each global debug-file-directory component prepended."),
3927 show_debug_file_directory
,
3928 &setlist
, &showlist
);