1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2016 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"
51 #include "parser-defs.h"
58 #include "cli/cli-utils.h"
60 #include <sys/types.h>
65 #include "gdb_sys_time.h"
69 int (*deprecated_ui_load_progress_hook
) (const char *section
,
71 void (*deprecated_show_load_progress
) (const char *section
,
72 unsigned long section_sent
,
73 unsigned long section_size
,
74 unsigned long total_sent
,
75 unsigned long total_size
);
76 void (*deprecated_pre_add_symbol_hook
) (const char *);
77 void (*deprecated_post_add_symbol_hook
) (void);
79 static void clear_symtab_users_cleanup (void *ignore
);
81 /* Global variables owned by this file. */
82 int readnow_symbol_files
; /* Read full symbols immediately. */
84 /* Functions this file defines. */
86 static void load_command (char *, int);
88 static void symbol_file_add_main_1 (const char *args
, int from_tty
, int flags
);
90 static void add_symbol_file_command (char *, int);
92 static const struct sym_fns
*find_sym_fns (bfd
*);
94 static void decrement_reading_symtab (void *);
96 static void overlay_invalidate_all (void);
98 static void overlay_auto_command (char *, int);
100 static void overlay_manual_command (char *, int);
102 static void overlay_off_command (char *, int);
104 static void overlay_load_command (char *, int);
106 static void overlay_command (char *, int);
108 static void simple_free_overlay_table (void);
110 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
113 static int simple_read_overlay_table (void);
115 static int simple_overlay_update_1 (struct obj_section
*);
117 static void add_filename_language (char *ext
, enum language lang
);
119 static void info_ext_lang_command (char *args
, int from_tty
);
121 static void init_filename_language_table (void);
123 static void symfile_find_segment_sections (struct objfile
*objfile
);
125 void _initialize_symfile (void);
127 /* List of all available sym_fns. On gdb startup, each object file reader
128 calls add_symtab_fns() to register information on each format it is
133 /* BFD flavour that we handle. */
134 enum bfd_flavour sym_flavour
;
136 /* The "vtable" of symbol functions. */
137 const struct sym_fns
*sym_fns
;
138 } registered_sym_fns
;
140 DEF_VEC_O (registered_sym_fns
);
142 static VEC (registered_sym_fns
) *symtab_fns
= NULL
;
144 /* Values for "set print symbol-loading". */
146 const char print_symbol_loading_off
[] = "off";
147 const char print_symbol_loading_brief
[] = "brief";
148 const char print_symbol_loading_full
[] = "full";
149 static const char *print_symbol_loading_enums
[] =
151 print_symbol_loading_off
,
152 print_symbol_loading_brief
,
153 print_symbol_loading_full
,
156 static const char *print_symbol_loading
= print_symbol_loading_full
;
158 /* If non-zero, shared library symbols will be added automatically
159 when the inferior is created, new libraries are loaded, or when
160 attaching to the inferior. This is almost always what users will
161 want to have happen; but for very large programs, the startup time
162 will be excessive, and so if this is a problem, the user can clear
163 this flag and then add the shared library symbols as needed. Note
164 that there is a potential for confusion, since if the shared
165 library symbols are not loaded, commands like "info fun" will *not*
166 report all the functions that are actually present. */
168 int auto_solib_add
= 1;
171 /* Return non-zero if symbol-loading messages should be printed.
172 FROM_TTY is the standard from_tty argument to gdb commands.
173 If EXEC is non-zero the messages are for the executable.
174 Otherwise, messages are for shared libraries.
175 If FULL is non-zero then the caller is printing a detailed message.
176 E.g., the message includes the shared library name.
177 Otherwise, the caller is printing a brief "summary" message. */
180 print_symbol_loading_p (int from_tty
, int exec
, int full
)
182 if (!from_tty
&& !info_verbose
)
187 /* We don't check FULL for executables, there are few such
188 messages, therefore brief == full. */
189 return print_symbol_loading
!= print_symbol_loading_off
;
192 return print_symbol_loading
== print_symbol_loading_full
;
193 return print_symbol_loading
== print_symbol_loading_brief
;
196 /* True if we are reading a symbol table. */
198 int currently_reading_symtab
= 0;
201 decrement_reading_symtab (void *dummy
)
203 currently_reading_symtab
--;
204 gdb_assert (currently_reading_symtab
>= 0);
207 /* Increment currently_reading_symtab and return a cleanup that can be
208 used to decrement it. */
211 increment_reading_symtab (void)
213 ++currently_reading_symtab
;
214 gdb_assert (currently_reading_symtab
> 0);
215 return make_cleanup (decrement_reading_symtab
, NULL
);
218 /* Remember the lowest-addressed loadable section we've seen.
219 This function is called via bfd_map_over_sections.
221 In case of equal vmas, the section with the largest size becomes the
222 lowest-addressed loadable section.
224 If the vmas and sizes are equal, the last section is considered the
225 lowest-addressed loadable section. */
228 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
230 asection
**lowest
= (asection
**) obj
;
232 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
235 *lowest
= sect
; /* First loadable section */
236 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
237 *lowest
= sect
; /* A lower loadable section */
238 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
239 && (bfd_section_size (abfd
, (*lowest
))
240 <= bfd_section_size (abfd
, sect
)))
244 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
245 new object's 'num_sections' field is set to 0; it must be updated
248 struct section_addr_info
*
249 alloc_section_addr_info (size_t num_sections
)
251 struct section_addr_info
*sap
;
254 size
= (sizeof (struct section_addr_info
)
255 + sizeof (struct other_sections
) * (num_sections
- 1));
256 sap
= (struct section_addr_info
*) xmalloc (size
);
257 memset (sap
, 0, size
);
262 /* Build (allocate and populate) a section_addr_info struct from
263 an existing section table. */
265 extern struct section_addr_info
*
266 build_section_addr_info_from_section_table (const struct target_section
*start
,
267 const struct target_section
*end
)
269 struct section_addr_info
*sap
;
270 const struct target_section
*stp
;
273 sap
= alloc_section_addr_info (end
- start
);
275 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
277 struct bfd_section
*asect
= stp
->the_bfd_section
;
278 bfd
*abfd
= asect
->owner
;
280 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
281 && oidx
< end
- start
)
283 sap
->other
[oidx
].addr
= stp
->addr
;
284 sap
->other
[oidx
].name
= xstrdup (bfd_section_name (abfd
, asect
));
285 sap
->other
[oidx
].sectindex
= gdb_bfd_section_index (abfd
, asect
);
290 sap
->num_sections
= oidx
;
295 /* Create a section_addr_info from section offsets in ABFD. */
297 static struct section_addr_info
*
298 build_section_addr_info_from_bfd (bfd
*abfd
)
300 struct section_addr_info
*sap
;
302 struct bfd_section
*sec
;
304 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
305 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
306 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
308 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
309 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
310 sap
->other
[i
].sectindex
= gdb_bfd_section_index (abfd
, sec
);
314 sap
->num_sections
= i
;
319 /* Create a section_addr_info from section offsets in OBJFILE. */
321 struct section_addr_info
*
322 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
324 struct section_addr_info
*sap
;
327 /* Before reread_symbols gets rewritten it is not safe to call:
328 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
330 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
331 for (i
= 0; i
< sap
->num_sections
; i
++)
333 int sectindex
= sap
->other
[i
].sectindex
;
335 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
340 /* Free all memory allocated by build_section_addr_info_from_section_table. */
343 free_section_addr_info (struct section_addr_info
*sap
)
347 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
348 xfree (sap
->other
[idx
].name
);
352 /* Initialize OBJFILE's sect_index_* members. */
355 init_objfile_sect_indices (struct objfile
*objfile
)
360 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
362 objfile
->sect_index_text
= sect
->index
;
364 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
366 objfile
->sect_index_data
= sect
->index
;
368 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
370 objfile
->sect_index_bss
= sect
->index
;
372 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
374 objfile
->sect_index_rodata
= sect
->index
;
376 /* This is where things get really weird... We MUST have valid
377 indices for the various sect_index_* members or gdb will abort.
378 So if for example, there is no ".text" section, we have to
379 accomodate that. First, check for a file with the standard
380 one or two segments. */
382 symfile_find_segment_sections (objfile
);
384 /* Except when explicitly adding symbol files at some address,
385 section_offsets contains nothing but zeros, so it doesn't matter
386 which slot in section_offsets the individual sect_index_* members
387 index into. So if they are all zero, it is safe to just point
388 all the currently uninitialized indices to the first slot. But
389 beware: if this is the main executable, it may be relocated
390 later, e.g. by the remote qOffsets packet, and then this will
391 be wrong! That's why we try segments first. */
393 for (i
= 0; i
< objfile
->num_sections
; i
++)
395 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
400 if (i
== objfile
->num_sections
)
402 if (objfile
->sect_index_text
== -1)
403 objfile
->sect_index_text
= 0;
404 if (objfile
->sect_index_data
== -1)
405 objfile
->sect_index_data
= 0;
406 if (objfile
->sect_index_bss
== -1)
407 objfile
->sect_index_bss
= 0;
408 if (objfile
->sect_index_rodata
== -1)
409 objfile
->sect_index_rodata
= 0;
413 /* The arguments to place_section. */
415 struct place_section_arg
417 struct section_offsets
*offsets
;
421 /* Find a unique offset to use for loadable section SECT if
422 the user did not provide an offset. */
425 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
427 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
428 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
430 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
432 /* We are only interested in allocated sections. */
433 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
436 /* If the user specified an offset, honor it. */
437 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
440 /* Otherwise, let's try to find a place for the section. */
441 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
448 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
450 int indx
= cur_sec
->index
;
452 /* We don't need to compare against ourself. */
456 /* We can only conflict with allocated sections. */
457 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
460 /* If the section offset is 0, either the section has not been placed
461 yet, or it was the lowest section placed (in which case LOWEST
462 will be past its end). */
463 if (offsets
[indx
] == 0)
466 /* If this section would overlap us, then we must move up. */
467 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
468 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
470 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
471 start_addr
= (start_addr
+ align
- 1) & -align
;
476 /* Otherwise, we appear to be OK. So far. */
481 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
482 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
485 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
486 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
490 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
492 const struct section_addr_info
*addrs
)
496 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
498 /* Now calculate offsets for section that were specified by the caller. */
499 for (i
= 0; i
< addrs
->num_sections
; i
++)
501 const struct other_sections
*osp
;
503 osp
= &addrs
->other
[i
];
504 if (osp
->sectindex
== -1)
507 /* Record all sections in offsets. */
508 /* The section_offsets in the objfile are here filled in using
510 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
514 /* Transform section name S for a name comparison. prelink can split section
515 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
516 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
517 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
518 (`.sbss') section has invalid (increased) virtual address. */
521 addr_section_name (const char *s
)
523 if (strcmp (s
, ".dynbss") == 0)
525 if (strcmp (s
, ".sdynbss") == 0)
531 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
532 their (name, sectindex) pair. sectindex makes the sort by name stable. */
535 addrs_section_compar (const void *ap
, const void *bp
)
537 const struct other_sections
*a
= *((struct other_sections
**) ap
);
538 const struct other_sections
*b
= *((struct other_sections
**) bp
);
541 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
545 return a
->sectindex
- b
->sectindex
;
548 /* Provide sorted array of pointers to sections of ADDRS. The array is
549 terminated by NULL. Caller is responsible to call xfree for it. */
551 static struct other_sections
**
552 addrs_section_sort (struct section_addr_info
*addrs
)
554 struct other_sections
**array
;
557 /* `+ 1' for the NULL terminator. */
558 array
= XNEWVEC (struct other_sections
*, addrs
->num_sections
+ 1);
559 for (i
= 0; i
< addrs
->num_sections
; i
++)
560 array
[i
] = &addrs
->other
[i
];
563 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
568 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
569 also SECTINDEXes specific to ABFD there. This function can be used to
570 rebase ADDRS to start referencing different BFD than before. */
573 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
575 asection
*lower_sect
;
576 CORE_ADDR lower_offset
;
578 struct cleanup
*my_cleanup
;
579 struct section_addr_info
*abfd_addrs
;
580 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
581 struct other_sections
**addrs_to_abfd_addrs
;
583 /* Find lowest loadable section to be used as starting point for
584 continguous sections. */
586 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
587 if (lower_sect
== NULL
)
589 warning (_("no loadable sections found in added symbol-file %s"),
590 bfd_get_filename (abfd
));
594 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
596 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
597 in ABFD. Section names are not unique - there can be multiple sections of
598 the same name. Also the sections of the same name do not have to be
599 adjacent to each other. Some sections may be present only in one of the
600 files. Even sections present in both files do not have to be in the same
603 Use stable sort by name for the sections in both files. Then linearly
604 scan both lists matching as most of the entries as possible. */
606 addrs_sorted
= addrs_section_sort (addrs
);
607 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
609 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
610 make_cleanup_free_section_addr_info (abfd_addrs
);
611 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
612 make_cleanup (xfree
, abfd_addrs_sorted
);
614 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
615 ABFD_ADDRS_SORTED. */
617 addrs_to_abfd_addrs
= XCNEWVEC (struct other_sections
*, addrs
->num_sections
);
618 make_cleanup (xfree
, addrs_to_abfd_addrs
);
620 while (*addrs_sorted
)
622 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
624 while (*abfd_addrs_sorted
625 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
629 if (*abfd_addrs_sorted
630 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
635 /* Make the found item directly addressable from ADDRS. */
636 index_in_addrs
= *addrs_sorted
- addrs
->other
;
637 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
638 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
640 /* Never use the same ABFD entry twice. */
647 /* Calculate offsets for the loadable sections.
648 FIXME! Sections must be in order of increasing loadable section
649 so that contiguous sections can use the lower-offset!!!
651 Adjust offsets if the segments are not contiguous.
652 If the section is contiguous, its offset should be set to
653 the offset of the highest loadable section lower than it
654 (the loadable section directly below it in memory).
655 this_offset = lower_offset = lower_addr - lower_orig_addr */
657 for (i
= 0; i
< addrs
->num_sections
; i
++)
659 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
663 /* This is the index used by BFD. */
664 addrs
->other
[i
].sectindex
= sect
->sectindex
;
666 if (addrs
->other
[i
].addr
!= 0)
668 addrs
->other
[i
].addr
-= sect
->addr
;
669 lower_offset
= addrs
->other
[i
].addr
;
672 addrs
->other
[i
].addr
= lower_offset
;
676 /* addr_section_name transformation is not used for SECT_NAME. */
677 const char *sect_name
= addrs
->other
[i
].name
;
679 /* This section does not exist in ABFD, which is normally
680 unexpected and we want to issue a warning.
682 However, the ELF prelinker does create a few sections which are
683 marked in the main executable as loadable (they are loaded in
684 memory from the DYNAMIC segment) and yet are not present in
685 separate debug info files. This is fine, and should not cause
686 a warning. Shared libraries contain just the section
687 ".gnu.liblist" but it is not marked as loadable there. There is
688 no other way to identify them than by their name as the sections
689 created by prelink have no special flags.
691 For the sections `.bss' and `.sbss' see addr_section_name. */
693 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
694 || strcmp (sect_name
, ".gnu.conflict") == 0
695 || (strcmp (sect_name
, ".bss") == 0
697 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
698 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
699 || (strcmp (sect_name
, ".sbss") == 0
701 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
702 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
703 warning (_("section %s not found in %s"), sect_name
,
704 bfd_get_filename (abfd
));
706 addrs
->other
[i
].addr
= 0;
707 addrs
->other
[i
].sectindex
= -1;
711 do_cleanups (my_cleanup
);
714 /* Parse the user's idea of an offset for dynamic linking, into our idea
715 of how to represent it for fast symbol reading. This is the default
716 version of the sym_fns.sym_offsets function for symbol readers that
717 don't need to do anything special. It allocates a section_offsets table
718 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
721 default_symfile_offsets (struct objfile
*objfile
,
722 const struct section_addr_info
*addrs
)
724 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
725 objfile
->section_offsets
= (struct section_offsets
*)
726 obstack_alloc (&objfile
->objfile_obstack
,
727 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
728 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
729 objfile
->num_sections
, addrs
);
731 /* For relocatable files, all loadable sections will start at zero.
732 The zero is meaningless, so try to pick arbitrary addresses such
733 that no loadable sections overlap. This algorithm is quadratic,
734 but the number of sections in a single object file is generally
736 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
738 struct place_section_arg arg
;
739 bfd
*abfd
= objfile
->obfd
;
742 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
743 /* We do not expect this to happen; just skip this step if the
744 relocatable file has a section with an assigned VMA. */
745 if (bfd_section_vma (abfd
, cur_sec
) != 0)
750 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
752 /* Pick non-overlapping offsets for sections the user did not
754 arg
.offsets
= objfile
->section_offsets
;
756 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
758 /* Correctly filling in the section offsets is not quite
759 enough. Relocatable files have two properties that
760 (most) shared objects do not:
762 - Their debug information will contain relocations. Some
763 shared libraries do also, but many do not, so this can not
766 - If there are multiple code sections they will be loaded
767 at different relative addresses in memory than they are
768 in the objfile, since all sections in the file will start
771 Because GDB has very limited ability to map from an
772 address in debug info to the correct code section,
773 it relies on adding SECT_OFF_TEXT to things which might be
774 code. If we clear all the section offsets, and set the
775 section VMAs instead, then symfile_relocate_debug_section
776 will return meaningful debug information pointing at the
779 GDB has too many different data structures for section
780 addresses - a bfd, objfile, and so_list all have section
781 tables, as does exec_ops. Some of these could probably
784 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
785 cur_sec
= cur_sec
->next
)
787 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
790 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
791 exec_set_section_address (bfd_get_filename (abfd
),
793 offsets
[cur_sec
->index
]);
794 offsets
[cur_sec
->index
] = 0;
799 /* Remember the bfd indexes for the .text, .data, .bss and
801 init_objfile_sect_indices (objfile
);
804 /* Divide the file into segments, which are individual relocatable units.
805 This is the default version of the sym_fns.sym_segments function for
806 symbol readers that do not have an explicit representation of segments.
807 It assumes that object files do not have segments, and fully linked
808 files have a single segment. */
810 struct symfile_segment_data
*
811 default_symfile_segments (bfd
*abfd
)
815 struct symfile_segment_data
*data
;
818 /* Relocatable files contain enough information to position each
819 loadable section independently; they should not be relocated
821 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
824 /* Make sure there is at least one loadable section in the file. */
825 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
827 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
835 low
= bfd_get_section_vma (abfd
, sect
);
836 high
= low
+ bfd_get_section_size (sect
);
838 data
= XCNEW (struct symfile_segment_data
);
839 data
->num_segments
= 1;
840 data
->segment_bases
= XCNEW (CORE_ADDR
);
841 data
->segment_sizes
= XCNEW (CORE_ADDR
);
843 num_sections
= bfd_count_sections (abfd
);
844 data
->segment_info
= XCNEWVEC (int, num_sections
);
846 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
850 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
853 vma
= bfd_get_section_vma (abfd
, sect
);
856 if (vma
+ bfd_get_section_size (sect
) > high
)
857 high
= vma
+ bfd_get_section_size (sect
);
859 data
->segment_info
[i
] = 1;
862 data
->segment_bases
[0] = low
;
863 data
->segment_sizes
[0] = high
- low
;
868 /* This is a convenience function to call sym_read for OBJFILE and
869 possibly force the partial symbols to be read. */
872 read_symbols (struct objfile
*objfile
, int add_flags
)
874 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
875 objfile
->per_bfd
->minsyms_read
= 1;
877 /* find_separate_debug_file_in_section should be called only if there is
878 single binary with no existing separate debug info file. */
879 if (!objfile_has_partial_symbols (objfile
)
880 && objfile
->separate_debug_objfile
== NULL
881 && objfile
->separate_debug_objfile_backlink
== NULL
)
883 bfd
*abfd
= find_separate_debug_file_in_section (objfile
);
884 struct cleanup
*cleanup
= make_cleanup_bfd_unref (abfd
);
888 /* find_separate_debug_file_in_section uses the same filename for the
889 virtual section-as-bfd like the bfd filename containing the
890 section. Therefore use also non-canonical name form for the same
891 file containing the section. */
892 symbol_file_add_separate (abfd
, objfile
->original_name
, add_flags
,
896 do_cleanups (cleanup
);
898 if ((add_flags
& SYMFILE_NO_READ
) == 0)
899 require_partial_symbols (objfile
, 0);
902 /* Initialize entry point information for this objfile. */
905 init_entry_point_info (struct objfile
*objfile
)
907 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
913 /* Save startup file's range of PC addresses to help blockframe.c
914 decide where the bottom of the stack is. */
916 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
918 /* Executable file -- record its entry point so we'll recognize
919 the startup file because it contains the entry point. */
920 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
921 ei
->entry_point_p
= 1;
923 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
924 && bfd_get_start_address (objfile
->obfd
) != 0)
926 /* Some shared libraries may have entry points set and be
927 runnable. There's no clear way to indicate this, so just check
928 for values other than zero. */
929 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
930 ei
->entry_point_p
= 1;
934 /* Examination of non-executable.o files. Short-circuit this stuff. */
935 ei
->entry_point_p
= 0;
938 if (ei
->entry_point_p
)
940 struct obj_section
*osect
;
941 CORE_ADDR entry_point
= ei
->entry_point
;
944 /* Make certain that the address points at real code, and not a
945 function descriptor. */
947 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
951 /* Remove any ISA markers, so that this matches entries in the
954 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
957 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
959 struct bfd_section
*sect
= osect
->the_bfd_section
;
961 if (entry_point
>= bfd_get_section_vma (objfile
->obfd
, sect
)
962 && entry_point
< (bfd_get_section_vma (objfile
->obfd
, sect
)
963 + bfd_get_section_size (sect
)))
965 ei
->the_bfd_section_index
966 = gdb_bfd_section_index (objfile
->obfd
, sect
);
973 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
977 /* Process a symbol file, as either the main file or as a dynamically
980 This function does not set the OBJFILE's entry-point info.
982 OBJFILE is where the symbols are to be read from.
984 ADDRS is the list of section load addresses. If the user has given
985 an 'add-symbol-file' command, then this is the list of offsets and
986 addresses he or she provided as arguments to the command; or, if
987 we're handling a shared library, these are the actual addresses the
988 sections are loaded at, according to the inferior's dynamic linker
989 (as gleaned by GDB's shared library code). We convert each address
990 into an offset from the section VMA's as it appears in the object
991 file, and then call the file's sym_offsets function to convert this
992 into a format-specific offset table --- a `struct section_offsets'.
994 ADD_FLAGS encodes verbosity level, whether this is main symbol or
995 an extra symbol file such as dynamically loaded code, and wether
996 breakpoint reset should be deferred. */
999 syms_from_objfile_1 (struct objfile
*objfile
,
1000 struct section_addr_info
*addrs
,
1003 struct section_addr_info
*local_addr
= NULL
;
1004 struct cleanup
*old_chain
;
1005 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1007 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
1009 if (objfile
->sf
== NULL
)
1011 /* No symbols to load, but we still need to make sure
1012 that the section_offsets table is allocated. */
1013 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
1014 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
1016 objfile
->num_sections
= num_sections
;
1017 objfile
->section_offsets
1018 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
1020 memset (objfile
->section_offsets
, 0, size
);
1024 /* Make sure that partially constructed symbol tables will be cleaned up
1025 if an error occurs during symbol reading. */
1026 old_chain
= make_cleanup_free_objfile (objfile
);
1028 /* If ADDRS is NULL, put together a dummy address list.
1029 We now establish the convention that an addr of zero means
1030 no load address was specified. */
1033 local_addr
= alloc_section_addr_info (1);
1034 make_cleanup (xfree
, local_addr
);
1040 /* We will modify the main symbol table, make sure that all its users
1041 will be cleaned up if an error occurs during symbol reading. */
1042 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1044 /* Since no error yet, throw away the old symbol table. */
1046 if (symfile_objfile
!= NULL
)
1048 free_objfile (symfile_objfile
);
1049 gdb_assert (symfile_objfile
== NULL
);
1052 /* Currently we keep symbols from the add-symbol-file command.
1053 If the user wants to get rid of them, they should do "symbol-file"
1054 without arguments first. Not sure this is the best behavior
1057 (*objfile
->sf
->sym_new_init
) (objfile
);
1060 /* Convert addr into an offset rather than an absolute address.
1061 We find the lowest address of a loaded segment in the objfile,
1062 and assume that <addr> is where that got loaded.
1064 We no longer warn if the lowest section is not a text segment (as
1065 happens for the PA64 port. */
1066 if (addrs
->num_sections
> 0)
1067 addr_info_make_relative (addrs
, objfile
->obfd
);
1069 /* Initialize symbol reading routines for this objfile, allow complaints to
1070 appear for this new file, and record how verbose to be, then do the
1071 initial symbol reading for this file. */
1073 (*objfile
->sf
->sym_init
) (objfile
);
1074 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1076 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1078 read_symbols (objfile
, add_flags
);
1080 /* Discard cleanups as symbol reading was successful. */
1082 discard_cleanups (old_chain
);
1086 /* Same as syms_from_objfile_1, but also initializes the objfile
1087 entry-point info. */
1090 syms_from_objfile (struct objfile
*objfile
,
1091 struct section_addr_info
*addrs
,
1094 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1095 init_entry_point_info (objfile
);
1098 /* Perform required actions after either reading in the initial
1099 symbols for a new objfile, or mapping in the symbols from a reusable
1100 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1103 finish_new_objfile (struct objfile
*objfile
, int add_flags
)
1105 /* If this is the main symbol file we have to clean up all users of the
1106 old main symbol file. Otherwise it is sufficient to fixup all the
1107 breakpoints that may have been redefined by this symbol file. */
1108 if (add_flags
& SYMFILE_MAINLINE
)
1110 /* OK, make it the "real" symbol file. */
1111 symfile_objfile
= objfile
;
1113 clear_symtab_users (add_flags
);
1115 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1117 breakpoint_re_set ();
1120 /* We're done reading the symbol file; finish off complaints. */
1121 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1124 /* Process a symbol file, as either the main file or as a dynamically
1127 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1128 A new reference is acquired by this function.
1130 For NAME description see allocate_objfile's definition.
1132 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1133 extra, such as dynamically loaded code, and what to do with breakpoins.
1135 ADDRS is as described for syms_from_objfile_1, above.
1136 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1138 PARENT is the original objfile if ABFD is a separate debug info file.
1139 Otherwise PARENT is NULL.
1141 Upon success, returns a pointer to the objfile that was added.
1142 Upon failure, jumps back to command level (never returns). */
1144 static struct objfile
*
1145 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
, int add_flags
,
1146 struct section_addr_info
*addrs
,
1147 int flags
, struct objfile
*parent
)
1149 struct objfile
*objfile
;
1150 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1151 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1152 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1153 && (readnow_symbol_files
1154 || (add_flags
& SYMFILE_NO_READ
) == 0));
1156 if (readnow_symbol_files
)
1158 flags
|= OBJF_READNOW
;
1159 add_flags
&= ~SYMFILE_NO_READ
;
1162 /* Give user a chance to burp if we'd be
1163 interactively wiping out any existing symbols. */
1165 if ((have_full_symbols () || have_partial_symbols ())
1168 && !query (_("Load new symbol table from \"%s\"? "), name
))
1169 error (_("Not confirmed."));
1171 objfile
= allocate_objfile (abfd
, name
,
1172 flags
| (mainline
? OBJF_MAINLINE
: 0));
1175 add_separate_debug_objfile (objfile
, parent
);
1177 /* We either created a new mapped symbol table, mapped an existing
1178 symbol table file which has not had initial symbol reading
1179 performed, or need to read an unmapped symbol table. */
1182 if (deprecated_pre_add_symbol_hook
)
1183 deprecated_pre_add_symbol_hook (name
);
1186 printf_unfiltered (_("Reading symbols from %s..."), name
);
1188 gdb_flush (gdb_stdout
);
1191 syms_from_objfile (objfile
, addrs
, add_flags
);
1193 /* We now have at least a partial symbol table. Check to see if the
1194 user requested that all symbols be read on initial access via either
1195 the gdb startup command line or on a per symbol file basis. Expand
1196 all partial symbol tables for this objfile if so. */
1198 if ((flags
& OBJF_READNOW
))
1202 printf_unfiltered (_("expanding to full symbols..."));
1204 gdb_flush (gdb_stdout
);
1208 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1211 if (should_print
&& !objfile_has_symbols (objfile
))
1214 printf_unfiltered (_("(no debugging symbols found)..."));
1220 if (deprecated_post_add_symbol_hook
)
1221 deprecated_post_add_symbol_hook ();
1223 printf_unfiltered (_("done.\n"));
1226 /* We print some messages regardless of whether 'from_tty ||
1227 info_verbose' is true, so make sure they go out at the right
1229 gdb_flush (gdb_stdout
);
1231 if (objfile
->sf
== NULL
)
1233 observer_notify_new_objfile (objfile
);
1234 return objfile
; /* No symbols. */
1237 finish_new_objfile (objfile
, add_flags
);
1239 observer_notify_new_objfile (objfile
);
1241 bfd_cache_close_all ();
1245 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1246 see allocate_objfile's definition. */
1249 symbol_file_add_separate (bfd
*bfd
, const char *name
, int symfile_flags
,
1250 struct objfile
*objfile
)
1252 struct objfile
*new_objfile
;
1253 struct section_addr_info
*sap
;
1254 struct cleanup
*my_cleanup
;
1256 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1257 because sections of BFD may not match sections of OBJFILE and because
1258 vma may have been modified by tools such as prelink. */
1259 sap
= build_section_addr_info_from_objfile (objfile
);
1260 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1262 new_objfile
= symbol_file_add_with_addrs
1263 (bfd
, name
, symfile_flags
, sap
,
1264 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1268 do_cleanups (my_cleanup
);
1271 /* Process the symbol file ABFD, as either the main file or as a
1272 dynamically loaded file.
1273 See symbol_file_add_with_addrs's comments for details. */
1276 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
, int add_flags
,
1277 struct section_addr_info
*addrs
,
1278 int flags
, struct objfile
*parent
)
1280 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1284 /* Process a symbol file, as either the main file or as a dynamically
1285 loaded file. See symbol_file_add_with_addrs's comments for details. */
1288 symbol_file_add (const char *name
, int add_flags
,
1289 struct section_addr_info
*addrs
, int flags
)
1291 bfd
*bfd
= symfile_bfd_open (name
);
1292 struct cleanup
*cleanup
= make_cleanup_bfd_unref (bfd
);
1293 struct objfile
*objf
;
1295 objf
= symbol_file_add_from_bfd (bfd
, name
, add_flags
, addrs
, flags
, NULL
);
1296 do_cleanups (cleanup
);
1300 /* Call symbol_file_add() with default values and update whatever is
1301 affected by the loading of a new main().
1302 Used when the file is supplied in the gdb command line
1303 and by some targets with special loading requirements.
1304 The auxiliary function, symbol_file_add_main_1(), has the flags
1305 argument for the switches that can only be specified in the symbol_file
1309 symbol_file_add_main (const char *args
, int from_tty
)
1311 symbol_file_add_main_1 (args
, from_tty
, 0);
1315 symbol_file_add_main_1 (const char *args
, int from_tty
, int flags
)
1317 const int add_flags
= (current_inferior ()->symfile_flags
1318 | SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0));
1320 symbol_file_add (args
, add_flags
, NULL
, flags
);
1322 /* Getting new symbols may change our opinion about
1323 what is frameless. */
1324 reinit_frame_cache ();
1326 if ((flags
& SYMFILE_NO_READ
) == 0)
1327 set_initial_language ();
1331 symbol_file_clear (int from_tty
)
1333 if ((have_full_symbols () || have_partial_symbols ())
1336 ? !query (_("Discard symbol table from `%s'? "),
1337 objfile_name (symfile_objfile
))
1338 : !query (_("Discard symbol table? "))))
1339 error (_("Not confirmed."));
1341 /* solib descriptors may have handles to objfiles. Wipe them before their
1342 objfiles get stale by free_all_objfiles. */
1343 no_shared_libraries (NULL
, from_tty
);
1345 free_all_objfiles ();
1347 gdb_assert (symfile_objfile
== NULL
);
1349 printf_unfiltered (_("No symbol file now.\n"));
1353 separate_debug_file_exists (const char *name
, unsigned long crc
,
1354 struct objfile
*parent_objfile
)
1356 unsigned long file_crc
;
1359 struct stat parent_stat
, abfd_stat
;
1360 int verified_as_different
;
1362 /* Find a separate debug info file as if symbols would be present in
1363 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1364 section can contain just the basename of PARENT_OBJFILE without any
1365 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1366 the separate debug infos with the same basename can exist. */
1368 if (filename_cmp (name
, objfile_name (parent_objfile
)) == 0)
1371 abfd
= gdb_bfd_open (name
, gnutarget
, -1);
1376 /* Verify symlinks were not the cause of filename_cmp name difference above.
1378 Some operating systems, e.g. Windows, do not provide a meaningful
1379 st_ino; they always set it to zero. (Windows does provide a
1380 meaningful st_dev.) Files accessed from gdbservers that do not
1381 support the vFile:fstat packet will also have st_ino set to zero.
1382 Do not indicate a duplicate library in either case. While there
1383 is no guarantee that a system that provides meaningful inode
1384 numbers will never set st_ino to zero, this is merely an
1385 optimization, so we do not need to worry about false negatives. */
1387 if (bfd_stat (abfd
, &abfd_stat
) == 0
1388 && abfd_stat
.st_ino
!= 0
1389 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1391 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1392 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1394 gdb_bfd_unref (abfd
);
1397 verified_as_different
= 1;
1400 verified_as_different
= 0;
1402 file_crc_p
= gdb_bfd_crc (abfd
, &file_crc
);
1404 gdb_bfd_unref (abfd
);
1409 if (crc
!= file_crc
)
1411 unsigned long parent_crc
;
1413 /* If the files could not be verified as different with
1414 bfd_stat then we need to calculate the parent's CRC
1415 to verify whether the files are different or not. */
1417 if (!verified_as_different
)
1419 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1423 if (verified_as_different
|| parent_crc
!= file_crc
)
1424 warning (_("the debug information found in \"%s\""
1425 " does not match \"%s\" (CRC mismatch).\n"),
1426 name
, objfile_name (parent_objfile
));
1434 char *debug_file_directory
= NULL
;
1436 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1437 struct cmd_list_element
*c
, const char *value
)
1439 fprintf_filtered (file
,
1440 _("The directory where separate debug "
1441 "symbols are searched for is \"%s\".\n"),
1445 #if ! defined (DEBUG_SUBDIRECTORY)
1446 #define DEBUG_SUBDIRECTORY ".debug"
1449 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1450 where the original file resides (may not be the same as
1451 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1452 looking for. CANON_DIR is the "realpath" form of DIR.
1453 DIR must contain a trailing '/'.
1454 Returns the path of the file with separate debug info, of NULL. */
1457 find_separate_debug_file (const char *dir
,
1458 const char *canon_dir
,
1459 const char *debuglink
,
1460 unsigned long crc32
, struct objfile
*objfile
)
1465 VEC (char_ptr
) *debugdir_vec
;
1466 struct cleanup
*back_to
;
1469 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1471 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1472 i
= strlen (canon_dir
);
1475 = (char *) xmalloc (strlen (debug_file_directory
) + 1
1477 + strlen (DEBUG_SUBDIRECTORY
)
1479 + strlen (debuglink
)
1482 /* First try in the same directory as the original file. */
1483 strcpy (debugfile
, dir
);
1484 strcat (debugfile
, debuglink
);
1486 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1489 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1490 strcpy (debugfile
, dir
);
1491 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1492 strcat (debugfile
, "/");
1493 strcat (debugfile
, debuglink
);
1495 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1498 /* Then try in the global debugfile directories.
1500 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1501 cause "/..." lookups. */
1503 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1504 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1506 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1508 strcpy (debugfile
, debugdir
);
1509 strcat (debugfile
, "/");
1510 strcat (debugfile
, dir
);
1511 strcat (debugfile
, debuglink
);
1513 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1515 do_cleanups (back_to
);
1519 /* If the file is in the sysroot, try using its base path in the
1520 global debugfile directory. */
1521 if (canon_dir
!= NULL
1522 && filename_ncmp (canon_dir
, gdb_sysroot
,
1523 strlen (gdb_sysroot
)) == 0
1524 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1526 strcpy (debugfile
, debugdir
);
1527 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1528 strcat (debugfile
, "/");
1529 strcat (debugfile
, debuglink
);
1531 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1533 do_cleanups (back_to
);
1539 do_cleanups (back_to
);
1544 /* Modify PATH to contain only "[/]directory/" part of PATH.
1545 If there were no directory separators in PATH, PATH will be empty
1546 string on return. */
1549 terminate_after_last_dir_separator (char *path
)
1553 /* Strip off the final filename part, leaving the directory name,
1554 followed by a slash. The directory can be relative or absolute. */
1555 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1556 if (IS_DIR_SEPARATOR (path
[i
]))
1559 /* If I is -1 then no directory is present there and DIR will be "". */
1563 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1564 Returns pathname, or NULL. */
1567 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1570 char *dir
, *canon_dir
;
1572 unsigned long crc32
;
1573 struct cleanup
*cleanups
;
1575 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1577 if (debuglink
== NULL
)
1579 /* There's no separate debug info, hence there's no way we could
1580 load it => no warning. */
1584 cleanups
= make_cleanup (xfree
, debuglink
);
1585 dir
= xstrdup (objfile_name (objfile
));
1586 make_cleanup (xfree
, dir
);
1587 terminate_after_last_dir_separator (dir
);
1588 canon_dir
= lrealpath (dir
);
1590 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1594 if (debugfile
== NULL
)
1596 /* For PR gdb/9538, try again with realpath (if different from the
1601 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1602 && S_ISLNK (st_buf
.st_mode
))
1606 symlink_dir
= lrealpath (objfile_name (objfile
));
1607 if (symlink_dir
!= NULL
)
1609 make_cleanup (xfree
, symlink_dir
);
1610 terminate_after_last_dir_separator (symlink_dir
);
1611 if (strcmp (dir
, symlink_dir
) != 0)
1613 /* Different directory, so try using it. */
1614 debugfile
= find_separate_debug_file (symlink_dir
,
1624 do_cleanups (cleanups
);
1628 /* This is the symbol-file command. Read the file, analyze its
1629 symbols, and add a struct symtab to a symtab list. The syntax of
1630 the command is rather bizarre:
1632 1. The function buildargv implements various quoting conventions
1633 which are undocumented and have little or nothing in common with
1634 the way things are quoted (or not quoted) elsewhere in GDB.
1636 2. Options are used, which are not generally used in GDB (perhaps
1637 "set mapped on", "set readnow on" would be better)
1639 3. The order of options matters, which is contrary to GNU
1640 conventions (because it is confusing and inconvenient). */
1643 symbol_file_command (char *args
, int from_tty
)
1649 symbol_file_clear (from_tty
);
1653 char **argv
= gdb_buildargv (args
);
1654 int flags
= OBJF_USERLOADED
;
1655 struct cleanup
*cleanups
;
1658 cleanups
= make_cleanup_freeargv (argv
);
1659 while (*argv
!= NULL
)
1661 if (strcmp (*argv
, "-readnow") == 0)
1662 flags
|= OBJF_READNOW
;
1663 else if (**argv
== '-')
1664 error (_("unknown option `%s'"), *argv
);
1667 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1675 error (_("no symbol file name was specified"));
1677 do_cleanups (cleanups
);
1681 /* Set the initial language.
1683 FIXME: A better solution would be to record the language in the
1684 psymtab when reading partial symbols, and then use it (if known) to
1685 set the language. This would be a win for formats that encode the
1686 language in an easily discoverable place, such as DWARF. For
1687 stabs, we can jump through hoops looking for specially named
1688 symbols or try to intuit the language from the specific type of
1689 stabs we find, but we can't do that until later when we read in
1693 set_initial_language (void)
1695 enum language lang
= main_language ();
1697 if (lang
== language_unknown
)
1699 char *name
= main_name ();
1700 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1703 lang
= SYMBOL_LANGUAGE (sym
);
1706 if (lang
== language_unknown
)
1708 /* Make C the default language */
1712 set_language (lang
);
1713 expected_language
= current_language
; /* Don't warn the user. */
1716 /* Open the file specified by NAME and hand it off to BFD for
1717 preliminary analysis. Return a newly initialized bfd *, which
1718 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1719 absolute). In case of trouble, error() is called. */
1722 symfile_bfd_open (const char *name
)
1726 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
1728 if (!is_target_filename (name
))
1730 char *expanded_name
, *absolute_name
;
1732 expanded_name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1734 /* Look down path for it, allocate 2nd new malloc'd copy. */
1735 desc
= openp (getenv ("PATH"),
1736 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1737 expanded_name
, O_RDONLY
| O_BINARY
, &absolute_name
);
1738 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1741 char *exename
= (char *) alloca (strlen (expanded_name
) + 5);
1743 strcat (strcpy (exename
, expanded_name
), ".exe");
1744 desc
= openp (getenv ("PATH"),
1745 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1746 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1751 make_cleanup (xfree
, expanded_name
);
1752 perror_with_name (expanded_name
);
1755 xfree (expanded_name
);
1756 make_cleanup (xfree
, absolute_name
);
1757 name
= absolute_name
;
1760 sym_bfd
= gdb_bfd_open (name
, gnutarget
, desc
);
1762 error (_("`%s': can't open to read symbols: %s."), name
,
1763 bfd_errmsg (bfd_get_error ()));
1765 if (!gdb_bfd_has_target_filename (sym_bfd
))
1766 bfd_set_cacheable (sym_bfd
, 1);
1768 if (!bfd_check_format (sym_bfd
, bfd_object
))
1770 make_cleanup_bfd_unref (sym_bfd
);
1771 error (_("`%s': can't read symbols: %s."), name
,
1772 bfd_errmsg (bfd_get_error ()));
1775 do_cleanups (back_to
);
1780 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1781 the section was not found. */
1784 get_section_index (struct objfile
*objfile
, char *section_name
)
1786 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1794 /* Link SF into the global symtab_fns list.
1795 FLAVOUR is the file format that SF handles.
1796 Called on startup by the _initialize routine in each object file format
1797 reader, to register information about each format the reader is prepared
1801 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1803 registered_sym_fns fns
= { flavour
, sf
};
1805 VEC_safe_push (registered_sym_fns
, symtab_fns
, &fns
);
1808 /* Initialize OBJFILE to read symbols from its associated BFD. It
1809 either returns or calls error(). The result is an initialized
1810 struct sym_fns in the objfile structure, that contains cached
1811 information about the symbol file. */
1813 static const struct sym_fns
*
1814 find_sym_fns (bfd
*abfd
)
1816 registered_sym_fns
*rsf
;
1817 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1820 if (our_flavour
== bfd_target_srec_flavour
1821 || our_flavour
== bfd_target_ihex_flavour
1822 || our_flavour
== bfd_target_tekhex_flavour
)
1823 return NULL
; /* No symbols. */
1825 for (i
= 0; VEC_iterate (registered_sym_fns
, symtab_fns
, i
, rsf
); ++i
)
1826 if (our_flavour
== rsf
->sym_flavour
)
1827 return rsf
->sym_fns
;
1829 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1830 bfd_get_target (abfd
));
1834 /* This function runs the load command of our current target. */
1837 load_command (char *arg
, int from_tty
)
1839 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1843 /* The user might be reloading because the binary has changed. Take
1844 this opportunity to check. */
1845 reopen_exec_file ();
1853 parg
= arg
= get_exec_file (1);
1855 /* Count how many \ " ' tab space there are in the name. */
1856 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1864 /* We need to quote this string so buildargv can pull it apart. */
1865 char *temp
= (char *) xmalloc (strlen (arg
) + count
+ 1 );
1869 make_cleanup (xfree
, temp
);
1872 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1874 strncpy (ptemp
, prev
, parg
- prev
);
1875 ptemp
+= parg
- prev
;
1879 strcpy (ptemp
, prev
);
1885 target_load (arg
, from_tty
);
1887 /* After re-loading the executable, we don't really know which
1888 overlays are mapped any more. */
1889 overlay_cache_invalid
= 1;
1891 do_cleanups (cleanup
);
1894 /* This version of "load" should be usable for any target. Currently
1895 it is just used for remote targets, not inftarg.c or core files,
1896 on the theory that only in that case is it useful.
1898 Avoiding xmodem and the like seems like a win (a) because we don't have
1899 to worry about finding it, and (b) On VMS, fork() is very slow and so
1900 we don't want to run a subprocess. On the other hand, I'm not sure how
1901 performance compares. */
1903 static int validate_download
= 0;
1905 /* Callback service function for generic_load (bfd_map_over_sections). */
1908 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1910 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1912 *sum
+= bfd_get_section_size (asec
);
1915 /* Opaque data for load_section_callback. */
1916 struct load_section_data
{
1917 CORE_ADDR load_offset
;
1918 struct load_progress_data
*progress_data
;
1919 VEC(memory_write_request_s
) *requests
;
1922 /* Opaque data for load_progress. */
1923 struct load_progress_data
{
1924 /* Cumulative data. */
1925 unsigned long write_count
;
1926 unsigned long data_count
;
1927 bfd_size_type total_size
;
1930 /* Opaque data for load_progress for a single section. */
1931 struct load_progress_section_data
{
1932 struct load_progress_data
*cumulative
;
1934 /* Per-section data. */
1935 const char *section_name
;
1936 ULONGEST section_sent
;
1937 ULONGEST section_size
;
1942 /* Target write callback routine for progress reporting. */
1945 load_progress (ULONGEST bytes
, void *untyped_arg
)
1947 struct load_progress_section_data
*args
1948 = (struct load_progress_section_data
*) untyped_arg
;
1949 struct load_progress_data
*totals
;
1952 /* Writing padding data. No easy way to get at the cumulative
1953 stats, so just ignore this. */
1956 totals
= args
->cumulative
;
1958 if (bytes
== 0 && args
->section_sent
== 0)
1960 /* The write is just starting. Let the user know we've started
1962 ui_out_message (current_uiout
, 0, "Loading section %s, size %s lma %s\n",
1963 args
->section_name
, hex_string (args
->section_size
),
1964 paddress (target_gdbarch (), args
->lma
));
1968 if (validate_download
)
1970 /* Broken memories and broken monitors manifest themselves here
1971 when bring new computers to life. This doubles already slow
1973 /* NOTE: cagney/1999-10-18: A more efficient implementation
1974 might add a verify_memory() method to the target vector and
1975 then use that. remote.c could implement that method using
1976 the ``qCRC'' packet. */
1977 gdb_byte
*check
= (gdb_byte
*) xmalloc (bytes
);
1978 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1980 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1981 error (_("Download verify read failed at %s"),
1982 paddress (target_gdbarch (), args
->lma
));
1983 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1984 error (_("Download verify compare failed at %s"),
1985 paddress (target_gdbarch (), args
->lma
));
1986 do_cleanups (verify_cleanups
);
1988 totals
->data_count
+= bytes
;
1990 args
->buffer
+= bytes
;
1991 totals
->write_count
+= 1;
1992 args
->section_sent
+= bytes
;
1993 if (check_quit_flag ()
1994 || (deprecated_ui_load_progress_hook
!= NULL
1995 && deprecated_ui_load_progress_hook (args
->section_name
,
1996 args
->section_sent
)))
1997 error (_("Canceled the download"));
1999 if (deprecated_show_load_progress
!= NULL
)
2000 deprecated_show_load_progress (args
->section_name
,
2004 totals
->total_size
);
2007 /* Callback service function for generic_load (bfd_map_over_sections). */
2010 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
2012 struct memory_write_request
*new_request
;
2013 struct load_section_data
*args
= (struct load_section_data
*) data
;
2014 struct load_progress_section_data
*section_data
;
2015 bfd_size_type size
= bfd_get_section_size (asec
);
2017 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
2019 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
2025 new_request
= VEC_safe_push (memory_write_request_s
,
2026 args
->requests
, NULL
);
2027 memset (new_request
, 0, sizeof (struct memory_write_request
));
2028 section_data
= XCNEW (struct load_progress_section_data
);
2029 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
2030 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
2032 new_request
->data
= (gdb_byte
*) xmalloc (size
);
2033 new_request
->baton
= section_data
;
2035 buffer
= new_request
->data
;
2037 section_data
->cumulative
= args
->progress_data
;
2038 section_data
->section_name
= sect_name
;
2039 section_data
->section_size
= size
;
2040 section_data
->lma
= new_request
->begin
;
2041 section_data
->buffer
= buffer
;
2043 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2046 /* Clean up an entire memory request vector, including load
2047 data and progress records. */
2050 clear_memory_write_data (void *arg
)
2052 VEC(memory_write_request_s
) **vec_p
= (VEC(memory_write_request_s
) **) arg
;
2053 VEC(memory_write_request_s
) *vec
= *vec_p
;
2055 struct memory_write_request
*mr
;
2057 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2062 VEC_free (memory_write_request_s
, vec
);
2066 generic_load (const char *args
, int from_tty
)
2069 struct timeval start_time
, end_time
;
2071 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2072 struct load_section_data cbdata
;
2073 struct load_progress_data total_progress
;
2074 struct ui_out
*uiout
= current_uiout
;
2079 memset (&cbdata
, 0, sizeof (cbdata
));
2080 memset (&total_progress
, 0, sizeof (total_progress
));
2081 cbdata
.progress_data
= &total_progress
;
2083 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2086 error_no_arg (_("file to load"));
2088 argv
= gdb_buildargv (args
);
2089 make_cleanup_freeargv (argv
);
2091 filename
= tilde_expand (argv
[0]);
2092 make_cleanup (xfree
, filename
);
2094 if (argv
[1] != NULL
)
2098 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2100 /* If the last word was not a valid number then
2101 treat it as a file name with spaces in. */
2102 if (argv
[1] == endptr
)
2103 error (_("Invalid download offset:%s."), argv
[1]);
2105 if (argv
[2] != NULL
)
2106 error (_("Too many parameters."));
2109 /* Open the file for loading. */
2110 loadfile_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2111 if (loadfile_bfd
== NULL
)
2113 perror_with_name (filename
);
2117 make_cleanup_bfd_unref (loadfile_bfd
);
2119 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2121 error (_("\"%s\" is not an object file: %s"), filename
,
2122 bfd_errmsg (bfd_get_error ()));
2125 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2126 (void *) &total_progress
.total_size
);
2128 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2130 gettimeofday (&start_time
, NULL
);
2132 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2133 load_progress
) != 0)
2134 error (_("Load failed"));
2136 gettimeofday (&end_time
, NULL
);
2138 entry
= bfd_get_start_address (loadfile_bfd
);
2139 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2140 ui_out_text (uiout
, "Start address ");
2141 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch (), entry
));
2142 ui_out_text (uiout
, ", load size ");
2143 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2144 ui_out_text (uiout
, "\n");
2145 regcache_write_pc (get_current_regcache (), entry
);
2147 /* Reset breakpoints, now that we have changed the load image. For
2148 instance, breakpoints may have been set (or reset, by
2149 post_create_inferior) while connected to the target but before we
2150 loaded the program. In that case, the prologue analyzer could
2151 have read instructions from the target to find the right
2152 breakpoint locations. Loading has changed the contents of that
2155 breakpoint_re_set ();
2157 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2158 total_progress
.write_count
,
2159 &start_time
, &end_time
);
2161 do_cleanups (old_cleanups
);
2164 /* Report how fast the transfer went. */
2167 print_transfer_performance (struct ui_file
*stream
,
2168 unsigned long data_count
,
2169 unsigned long write_count
,
2170 const struct timeval
*start_time
,
2171 const struct timeval
*end_time
)
2173 ULONGEST time_count
;
2174 struct ui_out
*uiout
= current_uiout
;
2176 /* Compute the elapsed time in milliseconds, as a tradeoff between
2177 accuracy and overflow. */
2178 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2179 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2181 ui_out_text (uiout
, "Transfer rate: ");
2184 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2186 if (ui_out_is_mi_like_p (uiout
))
2188 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2189 ui_out_text (uiout
, " bits/sec");
2191 else if (rate
< 1024)
2193 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2194 ui_out_text (uiout
, " bytes/sec");
2198 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2199 ui_out_text (uiout
, " KB/sec");
2204 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2205 ui_out_text (uiout
, " bits in <1 sec");
2207 if (write_count
> 0)
2209 ui_out_text (uiout
, ", ");
2210 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2211 ui_out_text (uiout
, " bytes/write");
2213 ui_out_text (uiout
, ".\n");
2216 /* This function allows the addition of incrementally linked object files.
2217 It does not modify any state in the target, only in the debugger. */
2218 /* Note: ezannoni 2000-04-13 This function/command used to have a
2219 special case syntax for the rombug target (Rombug is the boot
2220 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2221 rombug case, the user doesn't need to supply a text address,
2222 instead a call to target_link() (in target.c) would supply the
2223 value to use. We are now discontinuing this type of ad hoc syntax. */
2226 add_symbol_file_command (char *args
, int from_tty
)
2228 struct gdbarch
*gdbarch
= get_current_arch ();
2229 char *filename
= NULL
;
2230 int flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2232 int section_index
= 0;
2236 int expecting_sec_name
= 0;
2237 int expecting_sec_addr
= 0;
2239 struct objfile
*objf
;
2247 struct section_addr_info
*section_addrs
;
2248 struct sect_opt
*sect_opts
= NULL
;
2249 size_t num_sect_opts
= 0;
2250 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2253 sect_opts
= XNEWVEC (struct sect_opt
, num_sect_opts
);
2258 error (_("add-symbol-file takes a file name and an address"));
2260 argv
= gdb_buildargv (args
);
2261 make_cleanup_freeargv (argv
);
2263 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2265 /* Process the argument. */
2268 /* The first argument is the file name. */
2269 filename
= tilde_expand (arg
);
2270 make_cleanup (xfree
, filename
);
2272 else if (argcnt
== 1)
2274 /* The second argument is always the text address at which
2275 to load the program. */
2276 sect_opts
[section_index
].name
= ".text";
2277 sect_opts
[section_index
].value
= arg
;
2278 if (++section_index
>= num_sect_opts
)
2281 sect_opts
= ((struct sect_opt
*)
2282 xrealloc (sect_opts
,
2284 * sizeof (struct sect_opt
)));
2289 /* It's an option (starting with '-') or it's an argument
2291 if (expecting_sec_name
)
2293 sect_opts
[section_index
].name
= arg
;
2294 expecting_sec_name
= 0;
2296 else if (expecting_sec_addr
)
2298 sect_opts
[section_index
].value
= arg
;
2299 expecting_sec_addr
= 0;
2300 if (++section_index
>= num_sect_opts
)
2303 sect_opts
= ((struct sect_opt
*)
2304 xrealloc (sect_opts
,
2306 * sizeof (struct sect_opt
)));
2309 else if (strcmp (arg
, "-readnow") == 0)
2310 flags
|= OBJF_READNOW
;
2311 else if (strcmp (arg
, "-s") == 0)
2313 expecting_sec_name
= 1;
2314 expecting_sec_addr
= 1;
2317 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2318 " [-readnow] [-s <secname> <addr>]*"));
2322 /* This command takes at least two arguments. The first one is a
2323 filename, and the second is the address where this file has been
2324 loaded. Abort now if this address hasn't been provided by the
2326 if (section_index
< 1)
2327 error (_("The address where %s has been loaded is missing"), filename
);
2329 /* Print the prompt for the query below. And save the arguments into
2330 a sect_addr_info structure to be passed around to other
2331 functions. We have to split this up into separate print
2332 statements because hex_string returns a local static
2335 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2336 section_addrs
= alloc_section_addr_info (section_index
);
2337 make_cleanup (xfree
, section_addrs
);
2338 for (i
= 0; i
< section_index
; i
++)
2341 char *val
= sect_opts
[i
].value
;
2342 char *sec
= sect_opts
[i
].name
;
2344 addr
= parse_and_eval_address (val
);
2346 /* Here we store the section offsets in the order they were
2347 entered on the command line. */
2348 section_addrs
->other
[sec_num
].name
= sec
;
2349 section_addrs
->other
[sec_num
].addr
= addr
;
2350 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2351 paddress (gdbarch
, addr
));
2354 /* The object's sections are initialized when a
2355 call is made to build_objfile_section_table (objfile).
2356 This happens in reread_symbols.
2357 At this point, we don't know what file type this is,
2358 so we can't determine what section names are valid. */
2360 section_addrs
->num_sections
= sec_num
;
2362 if (from_tty
&& (!query ("%s", "")))
2363 error (_("Not confirmed."));
2365 objf
= symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2366 section_addrs
, flags
);
2368 add_target_sections_of_objfile (objf
);
2370 /* Getting new symbols may change our opinion about what is
2372 reinit_frame_cache ();
2373 do_cleanups (my_cleanups
);
2377 /* This function removes a symbol file that was added via add-symbol-file. */
2380 remove_symbol_file_command (char *args
, int from_tty
)
2383 struct objfile
*objf
= NULL
;
2384 struct cleanup
*my_cleanups
;
2385 struct program_space
*pspace
= current_program_space
;
2386 struct gdbarch
*gdbarch
= get_current_arch ();
2391 error (_("remove-symbol-file: no symbol file provided"));
2393 my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2395 argv
= gdb_buildargv (args
);
2397 if (strcmp (argv
[0], "-a") == 0)
2399 /* Interpret the next argument as an address. */
2402 if (argv
[1] == NULL
)
2403 error (_("Missing address argument"));
2405 if (argv
[2] != NULL
)
2406 error (_("Junk after %s"), argv
[1]);
2408 addr
= parse_and_eval_address (argv
[1]);
2412 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2413 && (objf
->flags
& OBJF_SHARED
) != 0
2414 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2418 else if (argv
[0] != NULL
)
2420 /* Interpret the current argument as a file name. */
2423 if (argv
[1] != NULL
)
2424 error (_("Junk after %s"), argv
[0]);
2426 filename
= tilde_expand (argv
[0]);
2427 make_cleanup (xfree
, filename
);
2431 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2432 && (objf
->flags
& OBJF_SHARED
) != 0
2433 && objf
->pspace
== pspace
2434 && filename_cmp (filename
, objfile_name (objf
)) == 0)
2440 error (_("No symbol file found"));
2443 && !query (_("Remove symbol table from file \"%s\"? "),
2444 objfile_name (objf
)))
2445 error (_("Not confirmed."));
2447 free_objfile (objf
);
2448 clear_symtab_users (0);
2450 do_cleanups (my_cleanups
);
2453 typedef struct objfile
*objfilep
;
2455 DEF_VEC_P (objfilep
);
2457 /* Re-read symbols if a symbol-file has changed. */
2460 reread_symbols (void)
2462 struct objfile
*objfile
;
2464 struct stat new_statbuf
;
2466 VEC (objfilep
) *new_objfiles
= NULL
;
2467 struct cleanup
*all_cleanups
;
2469 all_cleanups
= make_cleanup (VEC_cleanup (objfilep
), &new_objfiles
);
2471 /* With the addition of shared libraries, this should be modified,
2472 the load time should be saved in the partial symbol tables, since
2473 different tables may come from different source files. FIXME.
2474 This routine should then walk down each partial symbol table
2475 and see if the symbol table that it originates from has been changed. */
2477 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2479 if (objfile
->obfd
== NULL
)
2482 /* Separate debug objfiles are handled in the main objfile. */
2483 if (objfile
->separate_debug_objfile_backlink
)
2486 /* If this object is from an archive (what you usually create with
2487 `ar', often called a `static library' on most systems, though
2488 a `shared library' on AIX is also an archive), then you should
2489 stat on the archive name, not member name. */
2490 if (objfile
->obfd
->my_archive
)
2491 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2493 res
= stat (objfile_name (objfile
), &new_statbuf
);
2496 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2497 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2498 objfile_name (objfile
));
2501 new_modtime
= new_statbuf
.st_mtime
;
2502 if (new_modtime
!= objfile
->mtime
)
2504 struct cleanup
*old_cleanups
;
2505 struct section_offsets
*offsets
;
2507 char *original_name
;
2509 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2510 objfile_name (objfile
));
2512 /* There are various functions like symbol_file_add,
2513 symfile_bfd_open, syms_from_objfile, etc., which might
2514 appear to do what we want. But they have various other
2515 effects which we *don't* want. So we just do stuff
2516 ourselves. We don't worry about mapped files (for one thing,
2517 any mapped file will be out of date). */
2519 /* If we get an error, blow away this objfile (not sure if
2520 that is the correct response for things like shared
2522 old_cleanups
= make_cleanup_free_objfile (objfile
);
2523 /* We need to do this whenever any symbols go away. */
2524 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2526 if (exec_bfd
!= NULL
2527 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2528 bfd_get_filename (exec_bfd
)) == 0)
2530 /* Reload EXEC_BFD without asking anything. */
2532 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2535 /* Keep the calls order approx. the same as in free_objfile. */
2537 /* Free the separate debug objfiles. It will be
2538 automatically recreated by sym_read. */
2539 free_objfile_separate_debug (objfile
);
2541 /* Remove any references to this objfile in the global
2543 preserve_values (objfile
);
2545 /* Nuke all the state that we will re-read. Much of the following
2546 code which sets things to NULL really is necessary to tell
2547 other parts of GDB that there is nothing currently there.
2549 Try to keep the freeing order compatible with free_objfile. */
2551 if (objfile
->sf
!= NULL
)
2553 (*objfile
->sf
->sym_finish
) (objfile
);
2556 clear_objfile_data (objfile
);
2558 /* Clean up any state BFD has sitting around. */
2560 struct bfd
*obfd
= objfile
->obfd
;
2561 char *obfd_filename
;
2563 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2564 /* Open the new BFD before freeing the old one, so that
2565 the filename remains live. */
2566 objfile
->obfd
= gdb_bfd_open (obfd_filename
, gnutarget
, -1);
2567 if (objfile
->obfd
== NULL
)
2569 /* We have to make a cleanup and error here, rather
2570 than erroring later, because once we unref OBFD,
2571 OBFD_FILENAME will be freed. */
2572 make_cleanup_bfd_unref (obfd
);
2573 error (_("Can't open %s to read symbols."), obfd_filename
);
2575 gdb_bfd_unref (obfd
);
2578 original_name
= xstrdup (objfile
->original_name
);
2579 make_cleanup (xfree
, original_name
);
2581 /* bfd_openr sets cacheable to true, which is what we want. */
2582 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2583 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2584 bfd_errmsg (bfd_get_error ()));
2586 /* Save the offsets, we will nuke them with the rest of the
2588 num_offsets
= objfile
->num_sections
;
2589 offsets
= ((struct section_offsets
*)
2590 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2591 memcpy (offsets
, objfile
->section_offsets
,
2592 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2594 /* FIXME: Do we have to free a whole linked list, or is this
2596 if (objfile
->global_psymbols
.list
)
2597 xfree (objfile
->global_psymbols
.list
);
2598 memset (&objfile
->global_psymbols
, 0,
2599 sizeof (objfile
->global_psymbols
));
2600 if (objfile
->static_psymbols
.list
)
2601 xfree (objfile
->static_psymbols
.list
);
2602 memset (&objfile
->static_psymbols
, 0,
2603 sizeof (objfile
->static_psymbols
));
2605 /* Free the obstacks for non-reusable objfiles. */
2606 psymbol_bcache_free (objfile
->psymbol_cache
);
2607 objfile
->psymbol_cache
= psymbol_bcache_init ();
2608 obstack_free (&objfile
->objfile_obstack
, 0);
2609 objfile
->sections
= NULL
;
2610 objfile
->compunit_symtabs
= NULL
;
2611 objfile
->psymtabs
= NULL
;
2612 objfile
->psymtabs_addrmap
= NULL
;
2613 objfile
->free_psymtabs
= NULL
;
2614 objfile
->template_symbols
= NULL
;
2616 /* obstack_init also initializes the obstack so it is
2617 empty. We could use obstack_specify_allocation but
2618 gdb_obstack.h specifies the alloc/dealloc functions. */
2619 obstack_init (&objfile
->objfile_obstack
);
2621 /* set_objfile_per_bfd potentially allocates the per-bfd
2622 data on the objfile's obstack (if sharing data across
2623 multiple users is not possible), so it's important to
2624 do it *after* the obstack has been initialized. */
2625 set_objfile_per_bfd (objfile
);
2627 objfile
->original_name
2628 = (char *) obstack_copy0 (&objfile
->objfile_obstack
, original_name
,
2629 strlen (original_name
));
2631 /* Reset the sym_fns pointer. The ELF reader can change it
2632 based on whether .gdb_index is present, and we need it to
2633 start over. PR symtab/15885 */
2634 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2636 build_objfile_section_table (objfile
);
2637 terminate_minimal_symbol_table (objfile
);
2639 /* We use the same section offsets as from last time. I'm not
2640 sure whether that is always correct for shared libraries. */
2641 objfile
->section_offsets
= (struct section_offsets
*)
2642 obstack_alloc (&objfile
->objfile_obstack
,
2643 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2644 memcpy (objfile
->section_offsets
, offsets
,
2645 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2646 objfile
->num_sections
= num_offsets
;
2648 /* What the hell is sym_new_init for, anyway? The concept of
2649 distinguishing between the main file and additional files
2650 in this way seems rather dubious. */
2651 if (objfile
== symfile_objfile
)
2653 (*objfile
->sf
->sym_new_init
) (objfile
);
2656 (*objfile
->sf
->sym_init
) (objfile
);
2657 clear_complaints (&symfile_complaints
, 1, 1);
2659 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2660 read_symbols (objfile
, 0);
2662 if (!objfile_has_symbols (objfile
))
2665 printf_unfiltered (_("(no debugging symbols found)\n"));
2669 /* We're done reading the symbol file; finish off complaints. */
2670 clear_complaints (&symfile_complaints
, 0, 1);
2672 /* Getting new symbols may change our opinion about what is
2675 reinit_frame_cache ();
2677 /* Discard cleanups as symbol reading was successful. */
2678 discard_cleanups (old_cleanups
);
2680 /* If the mtime has changed between the time we set new_modtime
2681 and now, we *want* this to be out of date, so don't call stat
2683 objfile
->mtime
= new_modtime
;
2684 init_entry_point_info (objfile
);
2686 VEC_safe_push (objfilep
, new_objfiles
, objfile
);
2694 /* Notify objfiles that we've modified objfile sections. */
2695 objfiles_changed ();
2697 clear_symtab_users (0);
2699 /* clear_objfile_data for each objfile was called before freeing it and
2700 observer_notify_new_objfile (NULL) has been called by
2701 clear_symtab_users above. Notify the new files now. */
2702 for (ix
= 0; VEC_iterate (objfilep
, new_objfiles
, ix
, objfile
); ix
++)
2703 observer_notify_new_objfile (objfile
);
2705 /* At least one objfile has changed, so we can consider that
2706 the executable we're debugging has changed too. */
2707 observer_notify_executable_changed ();
2710 do_cleanups (all_cleanups
);
2721 static filename_language
*filename_language_table
;
2722 static int fl_table_size
, fl_table_next
;
2725 add_filename_language (char *ext
, enum language lang
)
2727 if (fl_table_next
>= fl_table_size
)
2729 fl_table_size
+= 10;
2730 filename_language_table
= XRESIZEVEC (filename_language
,
2731 filename_language_table
,
2735 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2736 filename_language_table
[fl_table_next
].lang
= lang
;
2740 static char *ext_args
;
2742 show_ext_args (struct ui_file
*file
, int from_tty
,
2743 struct cmd_list_element
*c
, const char *value
)
2745 fprintf_filtered (file
,
2746 _("Mapping between filename extension "
2747 "and source language is \"%s\".\n"),
2752 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2755 char *cp
= ext_args
;
2758 /* First arg is filename extension, starting with '.' */
2760 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2762 /* Find end of first arg. */
2763 while (*cp
&& !isspace (*cp
))
2767 error (_("'%s': two arguments required -- "
2768 "filename extension and language"),
2771 /* Null-terminate first arg. */
2774 /* Find beginning of second arg, which should be a source language. */
2775 cp
= skip_spaces (cp
);
2778 error (_("'%s': two arguments required -- "
2779 "filename extension and language"),
2782 /* Lookup the language from among those we know. */
2783 lang
= language_enum (cp
);
2785 /* Now lookup the filename extension: do we already know it? */
2786 for (i
= 0; i
< fl_table_next
; i
++)
2787 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2790 if (i
>= fl_table_next
)
2792 /* New file extension. */
2793 add_filename_language (ext_args
, lang
);
2797 /* Redefining a previously known filename extension. */
2800 /* query ("Really make files of type %s '%s'?", */
2801 /* ext_args, language_str (lang)); */
2803 xfree (filename_language_table
[i
].ext
);
2804 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2805 filename_language_table
[i
].lang
= lang
;
2810 info_ext_lang_command (char *args
, int from_tty
)
2814 printf_filtered (_("Filename extensions and the languages they represent:"));
2815 printf_filtered ("\n\n");
2816 for (i
= 0; i
< fl_table_next
; i
++)
2817 printf_filtered ("\t%s\t- %s\n",
2818 filename_language_table
[i
].ext
,
2819 language_str (filename_language_table
[i
].lang
));
2823 init_filename_language_table (void)
2825 if (fl_table_size
== 0) /* Protect against repetition. */
2829 filename_language_table
= XNEWVEC (filename_language
, fl_table_size
);
2831 add_filename_language (".c", language_c
);
2832 add_filename_language (".d", language_d
);
2833 add_filename_language (".C", language_cplus
);
2834 add_filename_language (".cc", language_cplus
);
2835 add_filename_language (".cp", language_cplus
);
2836 add_filename_language (".cpp", language_cplus
);
2837 add_filename_language (".cxx", language_cplus
);
2838 add_filename_language (".c++", language_cplus
);
2839 add_filename_language (".java", language_java
);
2840 add_filename_language (".class", language_java
);
2841 add_filename_language (".m", language_objc
);
2842 add_filename_language (".f", language_fortran
);
2843 add_filename_language (".F", language_fortran
);
2844 add_filename_language (".for", language_fortran
);
2845 add_filename_language (".FOR", language_fortran
);
2846 add_filename_language (".ftn", language_fortran
);
2847 add_filename_language (".FTN", language_fortran
);
2848 add_filename_language (".fpp", language_fortran
);
2849 add_filename_language (".FPP", language_fortran
);
2850 add_filename_language (".f90", language_fortran
);
2851 add_filename_language (".F90", language_fortran
);
2852 add_filename_language (".f95", language_fortran
);
2853 add_filename_language (".F95", language_fortran
);
2854 add_filename_language (".f03", language_fortran
);
2855 add_filename_language (".F03", language_fortran
);
2856 add_filename_language (".f08", language_fortran
);
2857 add_filename_language (".F08", language_fortran
);
2858 add_filename_language (".s", language_asm
);
2859 add_filename_language (".sx", language_asm
);
2860 add_filename_language (".S", language_asm
);
2861 add_filename_language (".pas", language_pascal
);
2862 add_filename_language (".p", language_pascal
);
2863 add_filename_language (".pp", language_pascal
);
2864 add_filename_language (".adb", language_ada
);
2865 add_filename_language (".ads", language_ada
);
2866 add_filename_language (".a", language_ada
);
2867 add_filename_language (".ada", language_ada
);
2868 add_filename_language (".dg", language_ada
);
2873 deduce_language_from_filename (const char *filename
)
2878 if (filename
!= NULL
)
2879 if ((cp
= strrchr (filename
, '.')) != NULL
)
2880 for (i
= 0; i
< fl_table_next
; i
++)
2881 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2882 return filename_language_table
[i
].lang
;
2884 return language_unknown
;
2887 /* Allocate and initialize a new symbol table.
2888 CUST is from the result of allocate_compunit_symtab. */
2891 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2893 struct objfile
*objfile
= cust
->objfile
;
2894 struct symtab
*symtab
2895 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2898 = (const char *) bcache (filename
, strlen (filename
) + 1,
2899 objfile
->per_bfd
->filename_cache
);
2900 symtab
->fullname
= NULL
;
2901 symtab
->language
= deduce_language_from_filename (filename
);
2903 /* This can be very verbose with lots of headers.
2904 Only print at higher debug levels. */
2905 if (symtab_create_debug
>= 2)
2907 /* Be a bit clever with debugging messages, and don't print objfile
2908 every time, only when it changes. */
2909 static char *last_objfile_name
= NULL
;
2911 if (last_objfile_name
== NULL
2912 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2914 xfree (last_objfile_name
);
2915 last_objfile_name
= xstrdup (objfile_name (objfile
));
2916 fprintf_unfiltered (gdb_stdlog
,
2917 "Creating one or more symtabs for objfile %s ...\n",
2920 fprintf_unfiltered (gdb_stdlog
,
2921 "Created symtab %s for module %s.\n",
2922 host_address_to_string (symtab
), filename
);
2925 /* Add it to CUST's list of symtabs. */
2926 if (cust
->filetabs
== NULL
)
2928 cust
->filetabs
= symtab
;
2929 cust
->last_filetab
= symtab
;
2933 cust
->last_filetab
->next
= symtab
;
2934 cust
->last_filetab
= symtab
;
2937 /* Backlink to the containing compunit symtab. */
2938 symtab
->compunit_symtab
= cust
;
2943 /* Allocate and initialize a new compunit.
2944 NAME is the name of the main source file, if there is one, or some
2945 descriptive text if there are no source files. */
2947 struct compunit_symtab
*
2948 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2950 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2951 struct compunit_symtab
);
2952 const char *saved_name
;
2954 cu
->objfile
= objfile
;
2956 /* The name we record here is only for display/debugging purposes.
2957 Just save the basename to avoid path issues (too long for display,
2958 relative vs absolute, etc.). */
2959 saved_name
= lbasename (name
);
2961 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2962 strlen (saved_name
));
2964 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2966 if (symtab_create_debug
)
2968 fprintf_unfiltered (gdb_stdlog
,
2969 "Created compunit symtab %s for %s.\n",
2970 host_address_to_string (cu
),
2977 /* Hook CU to the objfile it comes from. */
2980 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2982 cu
->next
= cu
->objfile
->compunit_symtabs
;
2983 cu
->objfile
->compunit_symtabs
= cu
;
2987 /* Reset all data structures in gdb which may contain references to symbol
2988 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2991 clear_symtab_users (int add_flags
)
2993 /* Someday, we should do better than this, by only blowing away
2994 the things that really need to be blown. */
2996 /* Clear the "current" symtab first, because it is no longer valid.
2997 breakpoint_re_set may try to access the current symtab. */
2998 clear_current_source_symtab_and_line ();
3001 clear_last_displayed_sal ();
3002 clear_pc_function_cache ();
3003 observer_notify_new_objfile (NULL
);
3005 /* Clear globals which might have pointed into a removed objfile.
3006 FIXME: It's not clear which of these are supposed to persist
3007 between expressions and which ought to be reset each time. */
3008 expression_context_block
= NULL
;
3009 innermost_block
= NULL
;
3011 /* Varobj may refer to old symbols, perform a cleanup. */
3012 varobj_invalidate ();
3014 /* Now that the various caches have been cleared, we can re_set
3015 our breakpoints without risking it using stale data. */
3016 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
3017 breakpoint_re_set ();
3021 clear_symtab_users_cleanup (void *ignore
)
3023 clear_symtab_users (0);
3027 The following code implements an abstraction for debugging overlay sections.
3029 The target model is as follows:
3030 1) The gnu linker will permit multiple sections to be mapped into the
3031 same VMA, each with its own unique LMA (or load address).
3032 2) It is assumed that some runtime mechanism exists for mapping the
3033 sections, one by one, from the load address into the VMA address.
3034 3) This code provides a mechanism for gdb to keep track of which
3035 sections should be considered to be mapped from the VMA to the LMA.
3036 This information is used for symbol lookup, and memory read/write.
3037 For instance, if a section has been mapped then its contents
3038 should be read from the VMA, otherwise from the LMA.
3040 Two levels of debugger support for overlays are available. One is
3041 "manual", in which the debugger relies on the user to tell it which
3042 overlays are currently mapped. This level of support is
3043 implemented entirely in the core debugger, and the information about
3044 whether a section is mapped is kept in the objfile->obj_section table.
3046 The second level of support is "automatic", and is only available if
3047 the target-specific code provides functionality to read the target's
3048 overlay mapping table, and translate its contents for the debugger
3049 (by updating the mapped state information in the obj_section tables).
3051 The interface is as follows:
3053 overlay map <name> -- tell gdb to consider this section mapped
3054 overlay unmap <name> -- tell gdb to consider this section unmapped
3055 overlay list -- list the sections that GDB thinks are mapped
3056 overlay read-target -- get the target's state of what's mapped
3057 overlay off/manual/auto -- set overlay debugging state
3058 Functional interface:
3059 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3060 section, return that section.
3061 find_pc_overlay(pc): find any overlay section that contains
3062 the pc, either in its VMA or its LMA
3063 section_is_mapped(sect): true if overlay is marked as mapped
3064 section_is_overlay(sect): true if section's VMA != LMA
3065 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3066 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3067 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3068 overlay_mapped_address(...): map an address from section's LMA to VMA
3069 overlay_unmapped_address(...): map an address from section's VMA to LMA
3070 symbol_overlayed_address(...): Return a "current" address for symbol:
3071 either in VMA or LMA depending on whether
3072 the symbol's section is currently mapped. */
3074 /* Overlay debugging state: */
3076 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3077 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
3079 /* Function: section_is_overlay (SECTION)
3080 Returns true if SECTION has VMA not equal to LMA, ie.
3081 SECTION is loaded at an address different from where it will "run". */
3084 section_is_overlay (struct obj_section
*section
)
3086 if (overlay_debugging
&& section
)
3088 bfd
*abfd
= section
->objfile
->obfd
;
3089 asection
*bfd_section
= section
->the_bfd_section
;
3091 if (bfd_section_lma (abfd
, bfd_section
) != 0
3092 && bfd_section_lma (abfd
, bfd_section
)
3093 != bfd_section_vma (abfd
, bfd_section
))
3100 /* Function: overlay_invalidate_all (void)
3101 Invalidate the mapped state of all overlay sections (mark it as stale). */
3104 overlay_invalidate_all (void)
3106 struct objfile
*objfile
;
3107 struct obj_section
*sect
;
3109 ALL_OBJSECTIONS (objfile
, sect
)
3110 if (section_is_overlay (sect
))
3111 sect
->ovly_mapped
= -1;
3114 /* Function: section_is_mapped (SECTION)
3115 Returns true if section is an overlay, and is currently mapped.
3117 Access to the ovly_mapped flag is restricted to this function, so
3118 that we can do automatic update. If the global flag
3119 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3120 overlay_invalidate_all. If the mapped state of the particular
3121 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3124 section_is_mapped (struct obj_section
*osect
)
3126 struct gdbarch
*gdbarch
;
3128 if (osect
== 0 || !section_is_overlay (osect
))
3131 switch (overlay_debugging
)
3135 return 0; /* overlay debugging off */
3136 case ovly_auto
: /* overlay debugging automatic */
3137 /* Unles there is a gdbarch_overlay_update function,
3138 there's really nothing useful to do here (can't really go auto). */
3139 gdbarch
= get_objfile_arch (osect
->objfile
);
3140 if (gdbarch_overlay_update_p (gdbarch
))
3142 if (overlay_cache_invalid
)
3144 overlay_invalidate_all ();
3145 overlay_cache_invalid
= 0;
3147 if (osect
->ovly_mapped
== -1)
3148 gdbarch_overlay_update (gdbarch
, osect
);
3150 /* fall thru to manual case */
3151 case ovly_on
: /* overlay debugging manual */
3152 return osect
->ovly_mapped
== 1;
3156 /* Function: pc_in_unmapped_range
3157 If PC falls into the lma range of SECTION, return true, else false. */
3160 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3162 if (section_is_overlay (section
))
3164 bfd
*abfd
= section
->objfile
->obfd
;
3165 asection
*bfd_section
= section
->the_bfd_section
;
3167 /* We assume the LMA is relocated by the same offset as the VMA. */
3168 bfd_vma size
= bfd_get_section_size (bfd_section
);
3169 CORE_ADDR offset
= obj_section_offset (section
);
3171 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3172 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3179 /* Function: pc_in_mapped_range
3180 If PC falls into the vma range of SECTION, return true, else false. */
3183 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3185 if (section_is_overlay (section
))
3187 if (obj_section_addr (section
) <= pc
3188 && pc
< obj_section_endaddr (section
))
3195 /* Return true if the mapped ranges of sections A and B overlap, false
3199 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3201 CORE_ADDR a_start
= obj_section_addr (a
);
3202 CORE_ADDR a_end
= obj_section_endaddr (a
);
3203 CORE_ADDR b_start
= obj_section_addr (b
);
3204 CORE_ADDR b_end
= obj_section_endaddr (b
);
3206 return (a_start
< b_end
&& b_start
< a_end
);
3209 /* Function: overlay_unmapped_address (PC, SECTION)
3210 Returns the address corresponding to PC in the unmapped (load) range.
3211 May be the same as PC. */
3214 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3216 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3218 bfd
*abfd
= section
->objfile
->obfd
;
3219 asection
*bfd_section
= section
->the_bfd_section
;
3221 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3222 - bfd_section_vma (abfd
, bfd_section
);
3228 /* Function: overlay_mapped_address (PC, SECTION)
3229 Returns the address corresponding to PC in the mapped (runtime) range.
3230 May be the same as PC. */
3233 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3235 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3237 bfd
*abfd
= section
->objfile
->obfd
;
3238 asection
*bfd_section
= section
->the_bfd_section
;
3240 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3241 - bfd_section_lma (abfd
, bfd_section
);
3247 /* Function: symbol_overlayed_address
3248 Return one of two addresses (relative to the VMA or to the LMA),
3249 depending on whether the section is mapped or not. */
3252 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3254 if (overlay_debugging
)
3256 /* If the symbol has no section, just return its regular address. */
3259 /* If the symbol's section is not an overlay, just return its
3261 if (!section_is_overlay (section
))
3263 /* If the symbol's section is mapped, just return its address. */
3264 if (section_is_mapped (section
))
3267 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3268 * then return its LOADED address rather than its vma address!!
3270 return overlay_unmapped_address (address
, section
);
3275 /* Function: find_pc_overlay (PC)
3276 Return the best-match overlay section for PC:
3277 If PC matches a mapped overlay section's VMA, return that section.
3278 Else if PC matches an unmapped section's VMA, return that section.
3279 Else if PC matches an unmapped section's LMA, return that section. */
3281 struct obj_section
*
3282 find_pc_overlay (CORE_ADDR pc
)
3284 struct objfile
*objfile
;
3285 struct obj_section
*osect
, *best_match
= NULL
;
3287 if (overlay_debugging
)
3288 ALL_OBJSECTIONS (objfile
, osect
)
3289 if (section_is_overlay (osect
))
3291 if (pc_in_mapped_range (pc
, osect
))
3293 if (section_is_mapped (osect
))
3298 else if (pc_in_unmapped_range (pc
, osect
))
3304 /* Function: find_pc_mapped_section (PC)
3305 If PC falls into the VMA address range of an overlay section that is
3306 currently marked as MAPPED, return that section. Else return NULL. */
3308 struct obj_section
*
3309 find_pc_mapped_section (CORE_ADDR pc
)
3311 struct objfile
*objfile
;
3312 struct obj_section
*osect
;
3314 if (overlay_debugging
)
3315 ALL_OBJSECTIONS (objfile
, osect
)
3316 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3322 /* Function: list_overlays_command
3323 Print a list of mapped sections and their PC ranges. */
3326 list_overlays_command (char *args
, int from_tty
)
3329 struct objfile
*objfile
;
3330 struct obj_section
*osect
;
3332 if (overlay_debugging
)
3333 ALL_OBJSECTIONS (objfile
, osect
)
3334 if (section_is_mapped (osect
))
3336 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3341 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3342 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3343 size
= bfd_get_section_size (osect
->the_bfd_section
);
3344 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3346 printf_filtered ("Section %s, loaded at ", name
);
3347 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3348 puts_filtered (" - ");
3349 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3350 printf_filtered (", mapped at ");
3351 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3352 puts_filtered (" - ");
3353 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3354 puts_filtered ("\n");
3359 printf_filtered (_("No sections are mapped.\n"));
3362 /* Function: map_overlay_command
3363 Mark the named section as mapped (ie. residing at its VMA address). */
3366 map_overlay_command (char *args
, int from_tty
)
3368 struct objfile
*objfile
, *objfile2
;
3369 struct obj_section
*sec
, *sec2
;
3371 if (!overlay_debugging
)
3372 error (_("Overlay debugging not enabled. Use "
3373 "either the 'overlay auto' or\n"
3374 "the 'overlay manual' command."));
3376 if (args
== 0 || *args
== 0)
3377 error (_("Argument required: name of an overlay section"));
3379 /* First, find a section matching the user supplied argument. */
3380 ALL_OBJSECTIONS (objfile
, sec
)
3381 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3383 /* Now, check to see if the section is an overlay. */
3384 if (!section_is_overlay (sec
))
3385 continue; /* not an overlay section */
3387 /* Mark the overlay as "mapped". */
3388 sec
->ovly_mapped
= 1;
3390 /* Next, make a pass and unmap any sections that are
3391 overlapped by this new section: */
3392 ALL_OBJSECTIONS (objfile2
, sec2
)
3393 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3396 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3397 bfd_section_name (objfile
->obfd
,
3398 sec2
->the_bfd_section
));
3399 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3403 error (_("No overlay section called %s"), args
);
3406 /* Function: unmap_overlay_command
3407 Mark the overlay section as unmapped
3408 (ie. resident in its LMA address range, rather than the VMA range). */
3411 unmap_overlay_command (char *args
, int from_tty
)
3413 struct objfile
*objfile
;
3414 struct obj_section
*sec
= NULL
;
3416 if (!overlay_debugging
)
3417 error (_("Overlay debugging not enabled. "
3418 "Use either the 'overlay auto' or\n"
3419 "the 'overlay manual' command."));
3421 if (args
== 0 || *args
== 0)
3422 error (_("Argument required: name of an overlay section"));
3424 /* First, find a section matching the user supplied argument. */
3425 ALL_OBJSECTIONS (objfile
, sec
)
3426 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3428 if (!sec
->ovly_mapped
)
3429 error (_("Section %s is not mapped"), args
);
3430 sec
->ovly_mapped
= 0;
3433 error (_("No overlay section called %s"), args
);
3436 /* Function: overlay_auto_command
3437 A utility command to turn on overlay debugging.
3438 Possibly this should be done via a set/show command. */
3441 overlay_auto_command (char *args
, int from_tty
)
3443 overlay_debugging
= ovly_auto
;
3444 enable_overlay_breakpoints ();
3446 printf_unfiltered (_("Automatic overlay debugging enabled."));
3449 /* Function: overlay_manual_command
3450 A utility command to turn on overlay debugging.
3451 Possibly this should be done via a set/show command. */
3454 overlay_manual_command (char *args
, int from_tty
)
3456 overlay_debugging
= ovly_on
;
3457 disable_overlay_breakpoints ();
3459 printf_unfiltered (_("Overlay debugging enabled."));
3462 /* Function: overlay_off_command
3463 A utility command to turn on overlay debugging.
3464 Possibly this should be done via a set/show command. */
3467 overlay_off_command (char *args
, int from_tty
)
3469 overlay_debugging
= ovly_off
;
3470 disable_overlay_breakpoints ();
3472 printf_unfiltered (_("Overlay debugging disabled."));
3476 overlay_load_command (char *args
, int from_tty
)
3478 struct gdbarch
*gdbarch
= get_current_arch ();
3480 if (gdbarch_overlay_update_p (gdbarch
))
3481 gdbarch_overlay_update (gdbarch
, NULL
);
3483 error (_("This target does not know how to read its overlay state."));
3486 /* Function: overlay_command
3487 A place-holder for a mis-typed command. */
3489 /* Command list chain containing all defined "overlay" subcommands. */
3490 static struct cmd_list_element
*overlaylist
;
3493 overlay_command (char *args
, int from_tty
)
3496 ("\"overlay\" must be followed by the name of an overlay command.\n");
3497 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3500 /* Target Overlays for the "Simplest" overlay manager:
3502 This is GDB's default target overlay layer. It works with the
3503 minimal overlay manager supplied as an example by Cygnus. The
3504 entry point is via a function pointer "gdbarch_overlay_update",
3505 so targets that use a different runtime overlay manager can
3506 substitute their own overlay_update function and take over the
3509 The overlay_update function pokes around in the target's data structures
3510 to see what overlays are mapped, and updates GDB's overlay mapping with
3513 In this simple implementation, the target data structures are as follows:
3514 unsigned _novlys; /# number of overlay sections #/
3515 unsigned _ovly_table[_novlys][4] = {
3516 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3517 {..., ..., ..., ...},
3519 unsigned _novly_regions; /# number of overlay regions #/
3520 unsigned _ovly_region_table[_novly_regions][3] = {
3521 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3524 These functions will attempt to update GDB's mappedness state in the
3525 symbol section table, based on the target's mappedness state.
3527 To do this, we keep a cached copy of the target's _ovly_table, and
3528 attempt to detect when the cached copy is invalidated. The main
3529 entry point is "simple_overlay_update(SECT), which looks up SECT in
3530 the cached table and re-reads only the entry for that section from
3531 the target (whenever possible). */
3533 /* Cached, dynamically allocated copies of the target data structures: */
3534 static unsigned (*cache_ovly_table
)[4] = 0;
3535 static unsigned cache_novlys
= 0;
3536 static CORE_ADDR cache_ovly_table_base
= 0;
3539 VMA
, OSIZE
, LMA
, MAPPED
3542 /* Throw away the cached copy of _ovly_table. */
3545 simple_free_overlay_table (void)
3547 if (cache_ovly_table
)
3548 xfree (cache_ovly_table
);
3550 cache_ovly_table
= NULL
;
3551 cache_ovly_table_base
= 0;
3554 /* Read an array of ints of size SIZE from the target into a local buffer.
3555 Convert to host order. int LEN is number of ints. */
3558 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3559 int len
, int size
, enum bfd_endian byte_order
)
3561 /* FIXME (alloca): Not safe if array is very large. */
3562 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3565 read_memory (memaddr
, buf
, len
* size
);
3566 for (i
= 0; i
< len
; i
++)
3567 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3570 /* Find and grab a copy of the target _ovly_table
3571 (and _novlys, which is needed for the table's size). */
3574 simple_read_overlay_table (void)
3576 struct bound_minimal_symbol novlys_msym
;
3577 struct bound_minimal_symbol ovly_table_msym
;
3578 struct gdbarch
*gdbarch
;
3580 enum bfd_endian byte_order
;
3582 simple_free_overlay_table ();
3583 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3584 if (! novlys_msym
.minsym
)
3586 error (_("Error reading inferior's overlay table: "
3587 "couldn't find `_novlys' variable\n"
3588 "in inferior. Use `overlay manual' mode."));
3592 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3593 if (! ovly_table_msym
.minsym
)
3595 error (_("Error reading inferior's overlay table: couldn't find "
3596 "`_ovly_table' array\n"
3597 "in inferior. Use `overlay manual' mode."));
3601 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3602 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3603 byte_order
= gdbarch_byte_order (gdbarch
);
3605 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3608 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3609 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3610 read_target_long_array (cache_ovly_table_base
,
3611 (unsigned int *) cache_ovly_table
,
3612 cache_novlys
* 4, word_size
, byte_order
);
3614 return 1; /* SUCCESS */
3617 /* Function: simple_overlay_update_1
3618 A helper function for simple_overlay_update. Assuming a cached copy
3619 of _ovly_table exists, look through it to find an entry whose vma,
3620 lma and size match those of OSECT. Re-read the entry and make sure
3621 it still matches OSECT (else the table may no longer be valid).
3622 Set OSECT's mapped state to match the entry. Return: 1 for
3623 success, 0 for failure. */
3626 simple_overlay_update_1 (struct obj_section
*osect
)
3629 bfd
*obfd
= osect
->objfile
->obfd
;
3630 asection
*bsect
= osect
->the_bfd_section
;
3631 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3632 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3633 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3635 size
= bfd_get_section_size (osect
->the_bfd_section
);
3636 for (i
= 0; i
< cache_novlys
; i
++)
3637 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3638 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3639 /* && cache_ovly_table[i][OSIZE] == size */ )
3641 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3642 (unsigned int *) cache_ovly_table
[i
],
3643 4, word_size
, byte_order
);
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][OSIZE] == size */ )
3648 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3651 else /* Warning! Warning! Target's ovly table has changed! */
3657 /* Function: simple_overlay_update
3658 If OSECT is NULL, then update all sections' mapped state
3659 (after re-reading the entire target _ovly_table).
3660 If OSECT is non-NULL, then try to find a matching entry in the
3661 cached ovly_table and update only OSECT's mapped state.
3662 If a cached entry can't be found or the cache isn't valid, then
3663 re-read the entire cache, and go ahead and update all sections. */
3666 simple_overlay_update (struct obj_section
*osect
)
3668 struct objfile
*objfile
;
3670 /* Were we given an osect to look up? NULL means do all of them. */
3672 /* Have we got a cached copy of the target's overlay table? */
3673 if (cache_ovly_table
!= NULL
)
3675 /* Does its cached location match what's currently in the
3677 struct bound_minimal_symbol minsym
3678 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3680 if (minsym
.minsym
== NULL
)
3681 error (_("Error reading inferior's overlay table: couldn't "
3682 "find `_ovly_table' array\n"
3683 "in inferior. Use `overlay manual' mode."));
3685 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3686 /* Then go ahead and try to look up this single section in
3688 if (simple_overlay_update_1 (osect
))
3689 /* Found it! We're done. */
3693 /* Cached table no good: need to read the entire table anew.
3694 Or else we want all the sections, in which case it's actually
3695 more efficient to read the whole table in one block anyway. */
3697 if (! simple_read_overlay_table ())
3700 /* Now may as well update all sections, even if only one was requested. */
3701 ALL_OBJSECTIONS (objfile
, osect
)
3702 if (section_is_overlay (osect
))
3705 bfd
*obfd
= osect
->objfile
->obfd
;
3706 asection
*bsect
= osect
->the_bfd_section
;
3708 size
= bfd_get_section_size (bsect
);
3709 for (i
= 0; i
< cache_novlys
; i
++)
3710 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3711 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3712 /* && cache_ovly_table[i][OSIZE] == size */ )
3713 { /* obj_section matches i'th entry in ovly_table. */
3714 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3715 break; /* finished with inner for loop: break out. */
3720 /* Set the output sections and output offsets for section SECTP in
3721 ABFD. The relocation code in BFD will read these offsets, so we
3722 need to be sure they're initialized. We map each section to itself,
3723 with no offset; this means that SECTP->vma will be honored. */
3726 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3728 sectp
->output_section
= sectp
;
3729 sectp
->output_offset
= 0;
3732 /* Default implementation for sym_relocate. */
3735 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3738 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3740 bfd
*abfd
= sectp
->owner
;
3742 /* We're only interested in sections with relocation
3744 if ((sectp
->flags
& SEC_RELOC
) == 0)
3747 /* We will handle section offsets properly elsewhere, so relocate as if
3748 all sections begin at 0. */
3749 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3751 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3754 /* Relocate the contents of a debug section SECTP in ABFD. The
3755 contents are stored in BUF if it is non-NULL, or returned in a
3756 malloc'd buffer otherwise.
3758 For some platforms and debug info formats, shared libraries contain
3759 relocations against the debug sections (particularly for DWARF-2;
3760 one affected platform is PowerPC GNU/Linux, although it depends on
3761 the version of the linker in use). Also, ELF object files naturally
3762 have unresolved relocations for their debug sections. We need to apply
3763 the relocations in order to get the locations of symbols correct.
3764 Another example that may require relocation processing, is the
3765 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3769 symfile_relocate_debug_section (struct objfile
*objfile
,
3770 asection
*sectp
, bfd_byte
*buf
)
3772 gdb_assert (objfile
->sf
->sym_relocate
);
3774 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3777 struct symfile_segment_data
*
3778 get_symfile_segment_data (bfd
*abfd
)
3780 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3785 return sf
->sym_segments (abfd
);
3789 free_symfile_segment_data (struct symfile_segment_data
*data
)
3791 xfree (data
->segment_bases
);
3792 xfree (data
->segment_sizes
);
3793 xfree (data
->segment_info
);
3798 - DATA, containing segment addresses from the object file ABFD, and
3799 the mapping from ABFD's sections onto the segments that own them,
3801 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3802 segment addresses reported by the target,
3803 store the appropriate offsets for each section in OFFSETS.
3805 If there are fewer entries in SEGMENT_BASES than there are segments
3806 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3808 If there are more entries, then ignore the extra. The target may
3809 not be able to distinguish between an empty data segment and a
3810 missing data segment; a missing text segment is less plausible. */
3813 symfile_map_offsets_to_segments (bfd
*abfd
,
3814 const struct symfile_segment_data
*data
,
3815 struct section_offsets
*offsets
,
3816 int num_segment_bases
,
3817 const CORE_ADDR
*segment_bases
)
3822 /* It doesn't make sense to call this function unless you have some
3823 segment base addresses. */
3824 gdb_assert (num_segment_bases
> 0);
3826 /* If we do not have segment mappings for the object file, we
3827 can not relocate it by segments. */
3828 gdb_assert (data
!= NULL
);
3829 gdb_assert (data
->num_segments
> 0);
3831 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3833 int which
= data
->segment_info
[i
];
3835 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3837 /* Don't bother computing offsets for sections that aren't
3838 loaded as part of any segment. */
3842 /* Use the last SEGMENT_BASES entry as the address of any extra
3843 segments mentioned in DATA->segment_info. */
3844 if (which
> num_segment_bases
)
3845 which
= num_segment_bases
;
3847 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3848 - data
->segment_bases
[which
- 1]);
3855 symfile_find_segment_sections (struct objfile
*objfile
)
3857 bfd
*abfd
= objfile
->obfd
;
3860 struct symfile_segment_data
*data
;
3862 data
= get_symfile_segment_data (objfile
->obfd
);
3866 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3868 free_symfile_segment_data (data
);
3872 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3874 int which
= data
->segment_info
[i
];
3878 if (objfile
->sect_index_text
== -1)
3879 objfile
->sect_index_text
= sect
->index
;
3881 if (objfile
->sect_index_rodata
== -1)
3882 objfile
->sect_index_rodata
= sect
->index
;
3884 else if (which
== 2)
3886 if (objfile
->sect_index_data
== -1)
3887 objfile
->sect_index_data
= sect
->index
;
3889 if (objfile
->sect_index_bss
== -1)
3890 objfile
->sect_index_bss
= sect
->index
;
3894 free_symfile_segment_data (data
);
3897 /* Listen for free_objfile events. */
3900 symfile_free_objfile (struct objfile
*objfile
)
3902 /* Remove the target sections owned by this objfile. */
3903 if (objfile
!= NULL
)
3904 remove_target_sections ((void *) objfile
);
3907 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3908 Expand all symtabs that match the specified criteria.
3909 See quick_symbol_functions.expand_symtabs_matching for details. */
3912 expand_symtabs_matching (expand_symtabs_file_matcher_ftype
*file_matcher
,
3913 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3914 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3915 enum search_domain kind
,
3918 struct objfile
*objfile
;
3920 ALL_OBJFILES (objfile
)
3923 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3925 expansion_notify
, kind
,
3930 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3931 Map function FUN over every file.
3932 See quick_symbol_functions.map_symbol_filenames for details. */
3935 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3938 struct objfile
*objfile
;
3940 ALL_OBJFILES (objfile
)
3943 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3949 _initialize_symfile (void)
3951 struct cmd_list_element
*c
;
3953 observer_attach_free_objfile (symfile_free_objfile
);
3955 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3956 Load symbol table from executable file FILE.\n\
3957 The `file' command can also load symbol tables, as well as setting the file\n\
3958 to execute."), &cmdlist
);
3959 set_cmd_completer (c
, filename_completer
);
3961 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3962 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3963 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3964 ...]\nADDR is the starting address of the file's text.\n\
3965 The optional arguments are section-name section-address pairs and\n\
3966 should be specified if the data and bss segments are not contiguous\n\
3967 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3969 set_cmd_completer (c
, filename_completer
);
3971 c
= add_cmd ("remove-symbol-file", class_files
,
3972 remove_symbol_file_command
, _("\
3973 Remove a symbol file added via the add-symbol-file command.\n\
3974 Usage: remove-symbol-file FILENAME\n\
3975 remove-symbol-file -a ADDRESS\n\
3976 The file to remove can be identified by its filename or by an address\n\
3977 that lies within the boundaries of this symbol file in memory."),
3980 c
= add_cmd ("load", class_files
, load_command
, _("\
3981 Dynamically load FILE into the running program, and record its symbols\n\
3982 for access from GDB.\n\
3983 A load OFFSET may also be given."), &cmdlist
);
3984 set_cmd_completer (c
, filename_completer
);
3986 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3987 _("Commands for debugging overlays."), &overlaylist
,
3988 "overlay ", 0, &cmdlist
);
3990 add_com_alias ("ovly", "overlay", class_alias
, 1);
3991 add_com_alias ("ov", "overlay", class_alias
, 1);
3993 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3994 _("Assert that an overlay section is mapped."), &overlaylist
);
3996 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3997 _("Assert that an overlay section is unmapped."), &overlaylist
);
3999 add_cmd ("list-overlays", class_support
, list_overlays_command
,
4000 _("List mappings of overlay sections."), &overlaylist
);
4002 add_cmd ("manual", class_support
, overlay_manual_command
,
4003 _("Enable overlay debugging."), &overlaylist
);
4004 add_cmd ("off", class_support
, overlay_off_command
,
4005 _("Disable overlay debugging."), &overlaylist
);
4006 add_cmd ("auto", class_support
, overlay_auto_command
,
4007 _("Enable automatic overlay debugging."), &overlaylist
);
4008 add_cmd ("load-target", class_support
, overlay_load_command
,
4009 _("Read the overlay mapping state from the target."), &overlaylist
);
4011 /* Filename extension to source language lookup table: */
4012 init_filename_language_table ();
4013 add_setshow_string_noescape_cmd ("extension-language", class_files
,
4015 Set mapping between filename extension and source language."), _("\
4016 Show mapping between filename extension and source language."), _("\
4017 Usage: set extension-language .foo bar"),
4018 set_ext_lang_command
,
4020 &setlist
, &showlist
);
4022 add_info ("extensions", info_ext_lang_command
,
4023 _("All filename extensions associated with a source language."));
4025 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
4026 &debug_file_directory
, _("\
4027 Set the directories where separate debug symbols are searched for."), _("\
4028 Show the directories where separate debug symbols are searched for."), _("\
4029 Separate debug symbols are first searched for in the same\n\
4030 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
4031 and lastly at the path of the directory of the binary with\n\
4032 each global debug-file-directory component prepended."),
4034 show_debug_file_directory
,
4035 &setlist
, &showlist
);
4037 add_setshow_enum_cmd ("symbol-loading", no_class
,
4038 print_symbol_loading_enums
, &print_symbol_loading
,
4040 Set printing of symbol loading messages."), _("\
4041 Show printing of symbol loading messages."), _("\
4042 off == turn all messages off\n\
4043 brief == print messages for the executable,\n\
4044 and brief messages for shared libraries\n\
4045 full == print messages for the executable,\n\
4046 and messages for each shared library."),
4049 &setprintlist
, &showprintlist
);