1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2015 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
= 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 = obstack_alloc (&objfile
->objfile_obstack
, size
);
1019 memset (objfile
->section_offsets
, 0, size
);
1023 /* Make sure that partially constructed symbol tables will be cleaned up
1024 if an error occurs during symbol reading. */
1025 old_chain
= make_cleanup_free_objfile (objfile
);
1027 /* If ADDRS is NULL, put together a dummy address list.
1028 We now establish the convention that an addr of zero means
1029 no load address was specified. */
1032 local_addr
= alloc_section_addr_info (1);
1033 make_cleanup (xfree
, local_addr
);
1039 /* We will modify the main symbol table, make sure that all its users
1040 will be cleaned up if an error occurs during symbol reading. */
1041 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1043 /* Since no error yet, throw away the old symbol table. */
1045 if (symfile_objfile
!= NULL
)
1047 free_objfile (symfile_objfile
);
1048 gdb_assert (symfile_objfile
== NULL
);
1051 /* Currently we keep symbols from the add-symbol-file command.
1052 If the user wants to get rid of them, they should do "symbol-file"
1053 without arguments first. Not sure this is the best behavior
1056 (*objfile
->sf
->sym_new_init
) (objfile
);
1059 /* Convert addr into an offset rather than an absolute address.
1060 We find the lowest address of a loaded segment in the objfile,
1061 and assume that <addr> is where that got loaded.
1063 We no longer warn if the lowest section is not a text segment (as
1064 happens for the PA64 port. */
1065 if (addrs
->num_sections
> 0)
1066 addr_info_make_relative (addrs
, objfile
->obfd
);
1068 /* Initialize symbol reading routines for this objfile, allow complaints to
1069 appear for this new file, and record how verbose to be, then do the
1070 initial symbol reading for this file. */
1072 (*objfile
->sf
->sym_init
) (objfile
);
1073 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1075 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1077 read_symbols (objfile
, add_flags
);
1079 /* Discard cleanups as symbol reading was successful. */
1081 discard_cleanups (old_chain
);
1085 /* Same as syms_from_objfile_1, but also initializes the objfile
1086 entry-point info. */
1089 syms_from_objfile (struct objfile
*objfile
,
1090 struct section_addr_info
*addrs
,
1093 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1094 init_entry_point_info (objfile
);
1097 /* Perform required actions after either reading in the initial
1098 symbols for a new objfile, or mapping in the symbols from a reusable
1099 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1102 finish_new_objfile (struct objfile
*objfile
, int add_flags
)
1104 /* If this is the main symbol file we have to clean up all users of the
1105 old main symbol file. Otherwise it is sufficient to fixup all the
1106 breakpoints that may have been redefined by this symbol file. */
1107 if (add_flags
& SYMFILE_MAINLINE
)
1109 /* OK, make it the "real" symbol file. */
1110 symfile_objfile
= objfile
;
1112 clear_symtab_users (add_flags
);
1114 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1116 breakpoint_re_set ();
1119 /* We're done reading the symbol file; finish off complaints. */
1120 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1123 /* Process a symbol file, as either the main file or as a dynamically
1126 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1127 A new reference is acquired by this function.
1129 For NAME description see allocate_objfile's definition.
1131 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1132 extra, such as dynamically loaded code, and what to do with breakpoins.
1134 ADDRS is as described for syms_from_objfile_1, above.
1135 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1137 PARENT is the original objfile if ABFD is a separate debug info file.
1138 Otherwise PARENT is NULL.
1140 Upon success, returns a pointer to the objfile that was added.
1141 Upon failure, jumps back to command level (never returns). */
1143 static struct objfile
*
1144 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
, int add_flags
,
1145 struct section_addr_info
*addrs
,
1146 int flags
, struct objfile
*parent
)
1148 struct objfile
*objfile
;
1149 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1150 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1151 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1152 && (readnow_symbol_files
1153 || (add_flags
& SYMFILE_NO_READ
) == 0));
1155 if (readnow_symbol_files
)
1157 flags
|= OBJF_READNOW
;
1158 add_flags
&= ~SYMFILE_NO_READ
;
1161 /* Give user a chance to burp if we'd be
1162 interactively wiping out any existing symbols. */
1164 if ((have_full_symbols () || have_partial_symbols ())
1167 && !query (_("Load new symbol table from \"%s\"? "), name
))
1168 error (_("Not confirmed."));
1170 objfile
= allocate_objfile (abfd
, name
,
1171 flags
| (mainline
? OBJF_MAINLINE
: 0));
1174 add_separate_debug_objfile (objfile
, parent
);
1176 /* We either created a new mapped symbol table, mapped an existing
1177 symbol table file which has not had initial symbol reading
1178 performed, or need to read an unmapped symbol table. */
1181 if (deprecated_pre_add_symbol_hook
)
1182 deprecated_pre_add_symbol_hook (name
);
1185 printf_unfiltered (_("Reading symbols from %s..."), name
);
1187 gdb_flush (gdb_stdout
);
1190 syms_from_objfile (objfile
, addrs
, add_flags
);
1192 /* We now have at least a partial symbol table. Check to see if the
1193 user requested that all symbols be read on initial access via either
1194 the gdb startup command line or on a per symbol file basis. Expand
1195 all partial symbol tables for this objfile if so. */
1197 if ((flags
& OBJF_READNOW
))
1201 printf_unfiltered (_("expanding to full symbols..."));
1203 gdb_flush (gdb_stdout
);
1207 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1210 if (should_print
&& !objfile_has_symbols (objfile
))
1213 printf_unfiltered (_("(no debugging symbols found)..."));
1219 if (deprecated_post_add_symbol_hook
)
1220 deprecated_post_add_symbol_hook ();
1222 printf_unfiltered (_("done.\n"));
1225 /* We print some messages regardless of whether 'from_tty ||
1226 info_verbose' is true, so make sure they go out at the right
1228 gdb_flush (gdb_stdout
);
1230 if (objfile
->sf
== NULL
)
1232 observer_notify_new_objfile (objfile
);
1233 return objfile
; /* No symbols. */
1236 finish_new_objfile (objfile
, add_flags
);
1238 observer_notify_new_objfile (objfile
);
1240 bfd_cache_close_all ();
1244 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1245 see allocate_objfile's definition. */
1248 symbol_file_add_separate (bfd
*bfd
, const char *name
, int symfile_flags
,
1249 struct objfile
*objfile
)
1251 struct objfile
*new_objfile
;
1252 struct section_addr_info
*sap
;
1253 struct cleanup
*my_cleanup
;
1255 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1256 because sections of BFD may not match sections of OBJFILE and because
1257 vma may have been modified by tools such as prelink. */
1258 sap
= build_section_addr_info_from_objfile (objfile
);
1259 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1261 new_objfile
= symbol_file_add_with_addrs
1262 (bfd
, name
, symfile_flags
, sap
,
1263 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1267 do_cleanups (my_cleanup
);
1270 /* Process the symbol file ABFD, as either the main file or as a
1271 dynamically loaded file.
1272 See symbol_file_add_with_addrs's comments for details. */
1275 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
, int add_flags
,
1276 struct section_addr_info
*addrs
,
1277 int flags
, struct objfile
*parent
)
1279 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1283 /* Process a symbol file, as either the main file or as a dynamically
1284 loaded file. See symbol_file_add_with_addrs's comments for details. */
1287 symbol_file_add (const char *name
, int add_flags
,
1288 struct section_addr_info
*addrs
, int flags
)
1290 bfd
*bfd
= symfile_bfd_open (name
);
1291 struct cleanup
*cleanup
= make_cleanup_bfd_unref (bfd
);
1292 struct objfile
*objf
;
1294 objf
= symbol_file_add_from_bfd (bfd
, name
, add_flags
, addrs
, flags
, NULL
);
1295 do_cleanups (cleanup
);
1299 /* Call symbol_file_add() with default values and update whatever is
1300 affected by the loading of a new main().
1301 Used when the file is supplied in the gdb command line
1302 and by some targets with special loading requirements.
1303 The auxiliary function, symbol_file_add_main_1(), has the flags
1304 argument for the switches that can only be specified in the symbol_file
1308 symbol_file_add_main (const char *args
, int from_tty
)
1310 symbol_file_add_main_1 (args
, from_tty
, 0);
1314 symbol_file_add_main_1 (const char *args
, int from_tty
, int flags
)
1316 const int add_flags
= (current_inferior ()->symfile_flags
1317 | SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0));
1319 symbol_file_add (args
, add_flags
, NULL
, flags
);
1321 /* Getting new symbols may change our opinion about
1322 what is frameless. */
1323 reinit_frame_cache ();
1325 if ((flags
& SYMFILE_NO_READ
) == 0)
1326 set_initial_language ();
1330 symbol_file_clear (int from_tty
)
1332 if ((have_full_symbols () || have_partial_symbols ())
1335 ? !query (_("Discard symbol table from `%s'? "),
1336 objfile_name (symfile_objfile
))
1337 : !query (_("Discard symbol table? "))))
1338 error (_("Not confirmed."));
1340 /* solib descriptors may have handles to objfiles. Wipe them before their
1341 objfiles get stale by free_all_objfiles. */
1342 no_shared_libraries (NULL
, from_tty
);
1344 free_all_objfiles ();
1346 gdb_assert (symfile_objfile
== NULL
);
1348 printf_unfiltered (_("No symbol file now.\n"));
1352 separate_debug_file_exists (const char *name
, unsigned long crc
,
1353 struct objfile
*parent_objfile
)
1355 unsigned long file_crc
;
1358 struct stat parent_stat
, abfd_stat
;
1359 int verified_as_different
;
1361 /* Find a separate debug info file as if symbols would be present in
1362 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1363 section can contain just the basename of PARENT_OBJFILE without any
1364 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1365 the separate debug infos with the same basename can exist. */
1367 if (filename_cmp (name
, objfile_name (parent_objfile
)) == 0)
1370 abfd
= gdb_bfd_open (name
, gnutarget
, -1);
1375 /* Verify symlinks were not the cause of filename_cmp name difference above.
1377 Some operating systems, e.g. Windows, do not provide a meaningful
1378 st_ino; they always set it to zero. (Windows does provide a
1379 meaningful st_dev.) Files accessed from gdbservers that do not
1380 support the vFile:fstat packet will also have st_ino set to zero.
1381 Do not indicate a duplicate library in either case. While there
1382 is no guarantee that a system that provides meaningful inode
1383 numbers will never set st_ino to zero, this is merely an
1384 optimization, so we do not need to worry about false negatives. */
1386 if (bfd_stat (abfd
, &abfd_stat
) == 0
1387 && abfd_stat
.st_ino
!= 0
1388 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1390 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1391 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1393 gdb_bfd_unref (abfd
);
1396 verified_as_different
= 1;
1399 verified_as_different
= 0;
1401 file_crc_p
= gdb_bfd_crc (abfd
, &file_crc
);
1403 gdb_bfd_unref (abfd
);
1408 if (crc
!= file_crc
)
1410 unsigned long parent_crc
;
1412 /* If the files could not be verified as different with
1413 bfd_stat then we need to calculate the parent's CRC
1414 to verify whether the files are different or not. */
1416 if (!verified_as_different
)
1418 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1422 if (verified_as_different
|| parent_crc
!= file_crc
)
1423 warning (_("the debug information found in \"%s\""
1424 " does not match \"%s\" (CRC mismatch).\n"),
1425 name
, objfile_name (parent_objfile
));
1433 char *debug_file_directory
= NULL
;
1435 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1436 struct cmd_list_element
*c
, const char *value
)
1438 fprintf_filtered (file
,
1439 _("The directory where separate debug "
1440 "symbols are searched for is \"%s\".\n"),
1444 #if ! defined (DEBUG_SUBDIRECTORY)
1445 #define DEBUG_SUBDIRECTORY ".debug"
1448 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1449 where the original file resides (may not be the same as
1450 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1451 looking for. CANON_DIR is the "realpath" form of DIR.
1452 DIR must contain a trailing '/'.
1453 Returns the path of the file with separate debug info, of NULL. */
1456 find_separate_debug_file (const char *dir
,
1457 const char *canon_dir
,
1458 const char *debuglink
,
1459 unsigned long crc32
, struct objfile
*objfile
)
1464 VEC (char_ptr
) *debugdir_vec
;
1465 struct cleanup
*back_to
;
1468 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1470 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1471 i
= strlen (canon_dir
);
1473 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1475 + strlen (DEBUG_SUBDIRECTORY
)
1477 + strlen (debuglink
)
1480 /* First try in the same directory as the original file. */
1481 strcpy (debugfile
, dir
);
1482 strcat (debugfile
, debuglink
);
1484 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1487 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1488 strcpy (debugfile
, dir
);
1489 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1490 strcat (debugfile
, "/");
1491 strcat (debugfile
, debuglink
);
1493 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1496 /* Then try in the global debugfile directories.
1498 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1499 cause "/..." lookups. */
1501 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1502 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1504 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1506 strcpy (debugfile
, debugdir
);
1507 strcat (debugfile
, "/");
1508 strcat (debugfile
, dir
);
1509 strcat (debugfile
, debuglink
);
1511 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1513 do_cleanups (back_to
);
1517 /* If the file is in the sysroot, try using its base path in the
1518 global debugfile directory. */
1519 if (canon_dir
!= NULL
1520 && filename_ncmp (canon_dir
, gdb_sysroot
,
1521 strlen (gdb_sysroot
)) == 0
1522 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1524 strcpy (debugfile
, debugdir
);
1525 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1526 strcat (debugfile
, "/");
1527 strcat (debugfile
, debuglink
);
1529 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1531 do_cleanups (back_to
);
1537 do_cleanups (back_to
);
1542 /* Modify PATH to contain only "[/]directory/" part of PATH.
1543 If there were no directory separators in PATH, PATH will be empty
1544 string on return. */
1547 terminate_after_last_dir_separator (char *path
)
1551 /* Strip off the final filename part, leaving the directory name,
1552 followed by a slash. The directory can be relative or absolute. */
1553 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1554 if (IS_DIR_SEPARATOR (path
[i
]))
1557 /* If I is -1 then no directory is present there and DIR will be "". */
1561 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1562 Returns pathname, or NULL. */
1565 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1568 char *dir
, *canon_dir
;
1570 unsigned long crc32
;
1571 struct cleanup
*cleanups
;
1573 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1575 if (debuglink
== NULL
)
1577 /* There's no separate debug info, hence there's no way we could
1578 load it => no warning. */
1582 cleanups
= make_cleanup (xfree
, debuglink
);
1583 dir
= xstrdup (objfile_name (objfile
));
1584 make_cleanup (xfree
, dir
);
1585 terminate_after_last_dir_separator (dir
);
1586 canon_dir
= lrealpath (dir
);
1588 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1592 if (debugfile
== NULL
)
1594 /* For PR gdb/9538, try again with realpath (if different from the
1599 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1600 && S_ISLNK (st_buf
.st_mode
))
1604 symlink_dir
= lrealpath (objfile_name (objfile
));
1605 if (symlink_dir
!= NULL
)
1607 make_cleanup (xfree
, symlink_dir
);
1608 terminate_after_last_dir_separator (symlink_dir
);
1609 if (strcmp (dir
, symlink_dir
) != 0)
1611 /* Different directory, so try using it. */
1612 debugfile
= find_separate_debug_file (symlink_dir
,
1622 do_cleanups (cleanups
);
1626 /* This is the symbol-file command. Read the file, analyze its
1627 symbols, and add a struct symtab to a symtab list. The syntax of
1628 the command is rather bizarre:
1630 1. The function buildargv implements various quoting conventions
1631 which are undocumented and have little or nothing in common with
1632 the way things are quoted (or not quoted) elsewhere in GDB.
1634 2. Options are used, which are not generally used in GDB (perhaps
1635 "set mapped on", "set readnow on" would be better)
1637 3. The order of options matters, which is contrary to GNU
1638 conventions (because it is confusing and inconvenient). */
1641 symbol_file_command (char *args
, int from_tty
)
1647 symbol_file_clear (from_tty
);
1651 char **argv
= gdb_buildargv (args
);
1652 int flags
= OBJF_USERLOADED
;
1653 struct cleanup
*cleanups
;
1656 cleanups
= make_cleanup_freeargv (argv
);
1657 while (*argv
!= NULL
)
1659 if (strcmp (*argv
, "-readnow") == 0)
1660 flags
|= OBJF_READNOW
;
1661 else if (**argv
== '-')
1662 error (_("unknown option `%s'"), *argv
);
1665 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1673 error (_("no symbol file name was specified"));
1675 do_cleanups (cleanups
);
1679 /* Set the initial language.
1681 FIXME: A better solution would be to record the language in the
1682 psymtab when reading partial symbols, and then use it (if known) to
1683 set the language. This would be a win for formats that encode the
1684 language in an easily discoverable place, such as DWARF. For
1685 stabs, we can jump through hoops looking for specially named
1686 symbols or try to intuit the language from the specific type of
1687 stabs we find, but we can't do that until later when we read in
1691 set_initial_language (void)
1693 enum language lang
= main_language ();
1695 if (lang
== language_unknown
)
1697 char *name
= main_name ();
1698 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1701 lang
= SYMBOL_LANGUAGE (sym
);
1704 if (lang
== language_unknown
)
1706 /* Make C the default language */
1710 set_language (lang
);
1711 expected_language
= current_language
; /* Don't warn the user. */
1714 /* Open the file specified by NAME and hand it off to BFD for
1715 preliminary analysis. Return a newly initialized bfd *, which
1716 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1717 absolute). In case of trouble, error() is called. */
1720 symfile_bfd_open (const char *name
)
1724 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
1726 if (!is_target_filename (name
))
1728 char *expanded_name
, *absolute_name
;
1730 expanded_name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1732 /* Look down path for it, allocate 2nd new malloc'd copy. */
1733 desc
= openp (getenv ("PATH"),
1734 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1735 expanded_name
, O_RDONLY
| O_BINARY
, &absolute_name
);
1736 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1739 char *exename
= alloca (strlen (expanded_name
) + 5);
1741 strcat (strcpy (exename
, expanded_name
), ".exe");
1742 desc
= openp (getenv ("PATH"),
1743 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1744 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1749 make_cleanup (xfree
, expanded_name
);
1750 perror_with_name (expanded_name
);
1753 xfree (expanded_name
);
1754 make_cleanup (xfree
, absolute_name
);
1755 name
= absolute_name
;
1758 sym_bfd
= gdb_bfd_open (name
, gnutarget
, desc
);
1760 error (_("`%s': can't open to read symbols: %s."), name
,
1761 bfd_errmsg (bfd_get_error ()));
1763 if (!gdb_bfd_has_target_filename (sym_bfd
))
1764 bfd_set_cacheable (sym_bfd
, 1);
1766 if (!bfd_check_format (sym_bfd
, bfd_object
))
1768 make_cleanup_bfd_unref (sym_bfd
);
1769 error (_("`%s': can't read symbols: %s."), name
,
1770 bfd_errmsg (bfd_get_error ()));
1773 do_cleanups (back_to
);
1778 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1779 the section was not found. */
1782 get_section_index (struct objfile
*objfile
, char *section_name
)
1784 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1792 /* Link SF into the global symtab_fns list.
1793 FLAVOUR is the file format that SF handles.
1794 Called on startup by the _initialize routine in each object file format
1795 reader, to register information about each format the reader is prepared
1799 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1801 registered_sym_fns fns
= { flavour
, sf
};
1803 VEC_safe_push (registered_sym_fns
, symtab_fns
, &fns
);
1806 /* Initialize OBJFILE to read symbols from its associated BFD. It
1807 either returns or calls error(). The result is an initialized
1808 struct sym_fns in the objfile structure, that contains cached
1809 information about the symbol file. */
1811 static const struct sym_fns
*
1812 find_sym_fns (bfd
*abfd
)
1814 registered_sym_fns
*rsf
;
1815 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1818 if (our_flavour
== bfd_target_srec_flavour
1819 || our_flavour
== bfd_target_ihex_flavour
1820 || our_flavour
== bfd_target_tekhex_flavour
)
1821 return NULL
; /* No symbols. */
1823 for (i
= 0; VEC_iterate (registered_sym_fns
, symtab_fns
, i
, rsf
); ++i
)
1824 if (our_flavour
== rsf
->sym_flavour
)
1825 return rsf
->sym_fns
;
1827 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1828 bfd_get_target (abfd
));
1832 /* This function runs the load command of our current target. */
1835 load_command (char *arg
, int from_tty
)
1837 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1841 /* The user might be reloading because the binary has changed. Take
1842 this opportunity to check. */
1843 reopen_exec_file ();
1851 parg
= arg
= get_exec_file (1);
1853 /* Count how many \ " ' tab space there are in the name. */
1854 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1862 /* We need to quote this string so buildargv can pull it apart. */
1863 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1867 make_cleanup (xfree
, temp
);
1870 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1872 strncpy (ptemp
, prev
, parg
- prev
);
1873 ptemp
+= parg
- prev
;
1877 strcpy (ptemp
, prev
);
1883 target_load (arg
, from_tty
);
1885 /* After re-loading the executable, we don't really know which
1886 overlays are mapped any more. */
1887 overlay_cache_invalid
= 1;
1889 do_cleanups (cleanup
);
1892 /* This version of "load" should be usable for any target. Currently
1893 it is just used for remote targets, not inftarg.c or core files,
1894 on the theory that only in that case is it useful.
1896 Avoiding xmodem and the like seems like a win (a) because we don't have
1897 to worry about finding it, and (b) On VMS, fork() is very slow and so
1898 we don't want to run a subprocess. On the other hand, I'm not sure how
1899 performance compares. */
1901 static int validate_download
= 0;
1903 /* Callback service function for generic_load (bfd_map_over_sections). */
1906 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1908 bfd_size_type
*sum
= data
;
1910 *sum
+= bfd_get_section_size (asec
);
1913 /* Opaque data for load_section_callback. */
1914 struct load_section_data
{
1915 CORE_ADDR load_offset
;
1916 struct load_progress_data
*progress_data
;
1917 VEC(memory_write_request_s
) *requests
;
1920 /* Opaque data for load_progress. */
1921 struct load_progress_data
{
1922 /* Cumulative data. */
1923 unsigned long write_count
;
1924 unsigned long data_count
;
1925 bfd_size_type total_size
;
1928 /* Opaque data for load_progress for a single section. */
1929 struct load_progress_section_data
{
1930 struct load_progress_data
*cumulative
;
1932 /* Per-section data. */
1933 const char *section_name
;
1934 ULONGEST section_sent
;
1935 ULONGEST section_size
;
1940 /* Target write callback routine for progress reporting. */
1943 load_progress (ULONGEST bytes
, void *untyped_arg
)
1945 struct load_progress_section_data
*args
= untyped_arg
;
1946 struct load_progress_data
*totals
;
1949 /* Writing padding data. No easy way to get at the cumulative
1950 stats, so just ignore this. */
1953 totals
= args
->cumulative
;
1955 if (bytes
== 0 && args
->section_sent
== 0)
1957 /* The write is just starting. Let the user know we've started
1959 ui_out_message (current_uiout
, 0, "Loading section %s, size %s lma %s\n",
1960 args
->section_name
, hex_string (args
->section_size
),
1961 paddress (target_gdbarch (), args
->lma
));
1965 if (validate_download
)
1967 /* Broken memories and broken monitors manifest themselves here
1968 when bring new computers to life. This doubles already slow
1970 /* NOTE: cagney/1999-10-18: A more efficient implementation
1971 might add a verify_memory() method to the target vector and
1972 then use that. remote.c could implement that method using
1973 the ``qCRC'' packet. */
1974 gdb_byte
*check
= xmalloc (bytes
);
1975 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1977 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1978 error (_("Download verify read failed at %s"),
1979 paddress (target_gdbarch (), args
->lma
));
1980 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1981 error (_("Download verify compare failed at %s"),
1982 paddress (target_gdbarch (), args
->lma
));
1983 do_cleanups (verify_cleanups
);
1985 totals
->data_count
+= bytes
;
1987 args
->buffer
+= bytes
;
1988 totals
->write_count
+= 1;
1989 args
->section_sent
+= bytes
;
1990 if (check_quit_flag ()
1991 || (deprecated_ui_load_progress_hook
!= NULL
1992 && deprecated_ui_load_progress_hook (args
->section_name
,
1993 args
->section_sent
)))
1994 error (_("Canceled the download"));
1996 if (deprecated_show_load_progress
!= NULL
)
1997 deprecated_show_load_progress (args
->section_name
,
2001 totals
->total_size
);
2004 /* Callback service function for generic_load (bfd_map_over_sections). */
2007 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
2009 struct memory_write_request
*new_request
;
2010 struct load_section_data
*args
= data
;
2011 struct load_progress_section_data
*section_data
;
2012 bfd_size_type size
= bfd_get_section_size (asec
);
2014 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
2016 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
2022 new_request
= VEC_safe_push (memory_write_request_s
,
2023 args
->requests
, NULL
);
2024 memset (new_request
, 0, sizeof (struct memory_write_request
));
2025 section_data
= XCNEW (struct load_progress_section_data
);
2026 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
2027 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
2029 new_request
->data
= xmalloc (size
);
2030 new_request
->baton
= section_data
;
2032 buffer
= new_request
->data
;
2034 section_data
->cumulative
= args
->progress_data
;
2035 section_data
->section_name
= sect_name
;
2036 section_data
->section_size
= size
;
2037 section_data
->lma
= new_request
->begin
;
2038 section_data
->buffer
= buffer
;
2040 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2043 /* Clean up an entire memory request vector, including load
2044 data and progress records. */
2047 clear_memory_write_data (void *arg
)
2049 VEC(memory_write_request_s
) **vec_p
= arg
;
2050 VEC(memory_write_request_s
) *vec
= *vec_p
;
2052 struct memory_write_request
*mr
;
2054 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2059 VEC_free (memory_write_request_s
, vec
);
2063 generic_load (const char *args
, int from_tty
)
2066 struct timeval start_time
, end_time
;
2068 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2069 struct load_section_data cbdata
;
2070 struct load_progress_data total_progress
;
2071 struct ui_out
*uiout
= current_uiout
;
2076 memset (&cbdata
, 0, sizeof (cbdata
));
2077 memset (&total_progress
, 0, sizeof (total_progress
));
2078 cbdata
.progress_data
= &total_progress
;
2080 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2083 error_no_arg (_("file to load"));
2085 argv
= gdb_buildargv (args
);
2086 make_cleanup_freeargv (argv
);
2088 filename
= tilde_expand (argv
[0]);
2089 make_cleanup (xfree
, filename
);
2091 if (argv
[1] != NULL
)
2095 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2097 /* If the last word was not a valid number then
2098 treat it as a file name with spaces in. */
2099 if (argv
[1] == endptr
)
2100 error (_("Invalid download offset:%s."), argv
[1]);
2102 if (argv
[2] != NULL
)
2103 error (_("Too many parameters."));
2106 /* Open the file for loading. */
2107 loadfile_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2108 if (loadfile_bfd
== NULL
)
2110 perror_with_name (filename
);
2114 make_cleanup_bfd_unref (loadfile_bfd
);
2116 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2118 error (_("\"%s\" is not an object file: %s"), filename
,
2119 bfd_errmsg (bfd_get_error ()));
2122 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2123 (void *) &total_progress
.total_size
);
2125 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2127 gettimeofday (&start_time
, NULL
);
2129 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2130 load_progress
) != 0)
2131 error (_("Load failed"));
2133 gettimeofday (&end_time
, NULL
);
2135 entry
= bfd_get_start_address (loadfile_bfd
);
2136 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2137 ui_out_text (uiout
, "Start address ");
2138 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch (), entry
));
2139 ui_out_text (uiout
, ", load size ");
2140 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2141 ui_out_text (uiout
, "\n");
2142 /* We were doing this in remote-mips.c, I suspect it is right
2143 for other targets too. */
2144 regcache_write_pc (get_current_regcache (), entry
);
2146 /* Reset breakpoints, now that we have changed the load image. For
2147 instance, breakpoints may have been set (or reset, by
2148 post_create_inferior) while connected to the target but before we
2149 loaded the program. In that case, the prologue analyzer could
2150 have read instructions from the target to find the right
2151 breakpoint locations. Loading has changed the contents of that
2154 breakpoint_re_set ();
2156 /* FIXME: are we supposed to call symbol_file_add or not? According
2157 to a comment from remote-mips.c (where a call to symbol_file_add
2158 was commented out), making the call confuses GDB if more than one
2159 file is loaded in. Some targets do (e.g., remote-vx.c) but
2160 others don't (or didn't - perhaps they have all been deleted). */
2162 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2163 total_progress
.write_count
,
2164 &start_time
, &end_time
);
2166 do_cleanups (old_cleanups
);
2169 /* Report how fast the transfer went. */
2172 print_transfer_performance (struct ui_file
*stream
,
2173 unsigned long data_count
,
2174 unsigned long write_count
,
2175 const struct timeval
*start_time
,
2176 const struct timeval
*end_time
)
2178 ULONGEST time_count
;
2179 struct ui_out
*uiout
= current_uiout
;
2181 /* Compute the elapsed time in milliseconds, as a tradeoff between
2182 accuracy and overflow. */
2183 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2184 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2186 ui_out_text (uiout
, "Transfer rate: ");
2189 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2191 if (ui_out_is_mi_like_p (uiout
))
2193 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2194 ui_out_text (uiout
, " bits/sec");
2196 else if (rate
< 1024)
2198 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2199 ui_out_text (uiout
, " bytes/sec");
2203 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2204 ui_out_text (uiout
, " KB/sec");
2209 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2210 ui_out_text (uiout
, " bits in <1 sec");
2212 if (write_count
> 0)
2214 ui_out_text (uiout
, ", ");
2215 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2216 ui_out_text (uiout
, " bytes/write");
2218 ui_out_text (uiout
, ".\n");
2221 /* This function allows the addition of incrementally linked object files.
2222 It does not modify any state in the target, only in the debugger. */
2223 /* Note: ezannoni 2000-04-13 This function/command used to have a
2224 special case syntax for the rombug target (Rombug is the boot
2225 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2226 rombug case, the user doesn't need to supply a text address,
2227 instead a call to target_link() (in target.c) would supply the
2228 value to use. We are now discontinuing this type of ad hoc syntax. */
2231 add_symbol_file_command (char *args
, int from_tty
)
2233 struct gdbarch
*gdbarch
= get_current_arch ();
2234 char *filename
= NULL
;
2235 int flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2237 int section_index
= 0;
2241 int expecting_sec_name
= 0;
2242 int expecting_sec_addr
= 0;
2244 struct objfile
*objf
;
2252 struct section_addr_info
*section_addrs
;
2253 struct sect_opt
*sect_opts
= NULL
;
2254 size_t num_sect_opts
= 0;
2255 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2258 sect_opts
= XNEWVEC (struct sect_opt
, num_sect_opts
);
2263 error (_("add-symbol-file takes a file name and an address"));
2265 argv
= gdb_buildargv (args
);
2266 make_cleanup_freeargv (argv
);
2268 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2270 /* Process the argument. */
2273 /* The first argument is the file name. */
2274 filename
= tilde_expand (arg
);
2275 make_cleanup (xfree
, filename
);
2277 else if (argcnt
== 1)
2279 /* The second argument is always the text address at which
2280 to load the program. */
2281 sect_opts
[section_index
].name
= ".text";
2282 sect_opts
[section_index
].value
= arg
;
2283 if (++section_index
>= num_sect_opts
)
2286 sect_opts
= ((struct sect_opt
*)
2287 xrealloc (sect_opts
,
2289 * sizeof (struct sect_opt
)));
2294 /* It's an option (starting with '-') or it's an argument
2296 if (expecting_sec_name
)
2298 sect_opts
[section_index
].name
= arg
;
2299 expecting_sec_name
= 0;
2301 else if (expecting_sec_addr
)
2303 sect_opts
[section_index
].value
= arg
;
2304 expecting_sec_addr
= 0;
2305 if (++section_index
>= num_sect_opts
)
2308 sect_opts
= ((struct sect_opt
*)
2309 xrealloc (sect_opts
,
2311 * sizeof (struct sect_opt
)));
2314 else if (strcmp (arg
, "-readnow") == 0)
2315 flags
|= OBJF_READNOW
;
2316 else if (strcmp (arg
, "-s") == 0)
2318 expecting_sec_name
= 1;
2319 expecting_sec_addr
= 1;
2322 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2323 " [-readnow] [-s <secname> <addr>]*"));
2327 /* This command takes at least two arguments. The first one is a
2328 filename, and the second is the address where this file has been
2329 loaded. Abort now if this address hasn't been provided by the
2331 if (section_index
< 1)
2332 error (_("The address where %s has been loaded is missing"), filename
);
2334 /* Print the prompt for the query below. And save the arguments into
2335 a sect_addr_info structure to be passed around to other
2336 functions. We have to split this up into separate print
2337 statements because hex_string returns a local static
2340 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2341 section_addrs
= alloc_section_addr_info (section_index
);
2342 make_cleanup (xfree
, section_addrs
);
2343 for (i
= 0; i
< section_index
; i
++)
2346 char *val
= sect_opts
[i
].value
;
2347 char *sec
= sect_opts
[i
].name
;
2349 addr
= parse_and_eval_address (val
);
2351 /* Here we store the section offsets in the order they were
2352 entered on the command line. */
2353 section_addrs
->other
[sec_num
].name
= sec
;
2354 section_addrs
->other
[sec_num
].addr
= addr
;
2355 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2356 paddress (gdbarch
, addr
));
2359 /* The object's sections are initialized when a
2360 call is made to build_objfile_section_table (objfile).
2361 This happens in reread_symbols.
2362 At this point, we don't know what file type this is,
2363 so we can't determine what section names are valid. */
2365 section_addrs
->num_sections
= sec_num
;
2367 if (from_tty
&& (!query ("%s", "")))
2368 error (_("Not confirmed."));
2370 objf
= symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2371 section_addrs
, flags
);
2373 add_target_sections_of_objfile (objf
);
2375 /* Getting new symbols may change our opinion about what is
2377 reinit_frame_cache ();
2378 do_cleanups (my_cleanups
);
2382 /* This function removes a symbol file that was added via add-symbol-file. */
2385 remove_symbol_file_command (char *args
, int from_tty
)
2388 struct objfile
*objf
= NULL
;
2389 struct cleanup
*my_cleanups
;
2390 struct program_space
*pspace
= current_program_space
;
2391 struct gdbarch
*gdbarch
= get_current_arch ();
2396 error (_("remove-symbol-file: no symbol file provided"));
2398 my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2400 argv
= gdb_buildargv (args
);
2402 if (strcmp (argv
[0], "-a") == 0)
2404 /* Interpret the next argument as an address. */
2407 if (argv
[1] == NULL
)
2408 error (_("Missing address argument"));
2410 if (argv
[2] != NULL
)
2411 error (_("Junk after %s"), argv
[1]);
2413 addr
= parse_and_eval_address (argv
[1]);
2417 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2418 && (objf
->flags
& OBJF_SHARED
) != 0
2419 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2423 else if (argv
[0] != NULL
)
2425 /* Interpret the current argument as a file name. */
2428 if (argv
[1] != NULL
)
2429 error (_("Junk after %s"), argv
[0]);
2431 filename
= tilde_expand (argv
[0]);
2432 make_cleanup (xfree
, filename
);
2436 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2437 && (objf
->flags
& OBJF_SHARED
) != 0
2438 && objf
->pspace
== pspace
2439 && filename_cmp (filename
, objfile_name (objf
)) == 0)
2445 error (_("No symbol file found"));
2448 && !query (_("Remove symbol table from file \"%s\"? "),
2449 objfile_name (objf
)))
2450 error (_("Not confirmed."));
2452 free_objfile (objf
);
2453 clear_symtab_users (0);
2455 do_cleanups (my_cleanups
);
2458 typedef struct objfile
*objfilep
;
2460 DEF_VEC_P (objfilep
);
2462 /* Re-read symbols if a symbol-file has changed. */
2465 reread_symbols (void)
2467 struct objfile
*objfile
;
2469 struct stat new_statbuf
;
2471 VEC (objfilep
) *new_objfiles
= NULL
;
2472 struct cleanup
*all_cleanups
;
2474 all_cleanups
= make_cleanup (VEC_cleanup (objfilep
), &new_objfiles
);
2476 /* With the addition of shared libraries, this should be modified,
2477 the load time should be saved in the partial symbol tables, since
2478 different tables may come from different source files. FIXME.
2479 This routine should then walk down each partial symbol table
2480 and see if the symbol table that it originates from has been changed. */
2482 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2484 if (objfile
->obfd
== NULL
)
2487 /* Separate debug objfiles are handled in the main objfile. */
2488 if (objfile
->separate_debug_objfile_backlink
)
2491 /* If this object is from an archive (what you usually create with
2492 `ar', often called a `static library' on most systems, though
2493 a `shared library' on AIX is also an archive), then you should
2494 stat on the archive name, not member name. */
2495 if (objfile
->obfd
->my_archive
)
2496 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2498 res
= stat (objfile_name (objfile
), &new_statbuf
);
2501 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2502 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2503 objfile_name (objfile
));
2506 new_modtime
= new_statbuf
.st_mtime
;
2507 if (new_modtime
!= objfile
->mtime
)
2509 struct cleanup
*old_cleanups
;
2510 struct section_offsets
*offsets
;
2512 char *original_name
;
2514 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2515 objfile_name (objfile
));
2517 /* There are various functions like symbol_file_add,
2518 symfile_bfd_open, syms_from_objfile, etc., which might
2519 appear to do what we want. But they have various other
2520 effects which we *don't* want. So we just do stuff
2521 ourselves. We don't worry about mapped files (for one thing,
2522 any mapped file will be out of date). */
2524 /* If we get an error, blow away this objfile (not sure if
2525 that is the correct response for things like shared
2527 old_cleanups
= make_cleanup_free_objfile (objfile
);
2528 /* We need to do this whenever any symbols go away. */
2529 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2531 if (exec_bfd
!= NULL
2532 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2533 bfd_get_filename (exec_bfd
)) == 0)
2535 /* Reload EXEC_BFD without asking anything. */
2537 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2540 /* Keep the calls order approx. the same as in free_objfile. */
2542 /* Free the separate debug objfiles. It will be
2543 automatically recreated by sym_read. */
2544 free_objfile_separate_debug (objfile
);
2546 /* Remove any references to this objfile in the global
2548 preserve_values (objfile
);
2550 /* Nuke all the state that we will re-read. Much of the following
2551 code which sets things to NULL really is necessary to tell
2552 other parts of GDB that there is nothing currently there.
2554 Try to keep the freeing order compatible with free_objfile. */
2556 if (objfile
->sf
!= NULL
)
2558 (*objfile
->sf
->sym_finish
) (objfile
);
2561 clear_objfile_data (objfile
);
2563 /* Clean up any state BFD has sitting around. */
2565 struct bfd
*obfd
= objfile
->obfd
;
2566 char *obfd_filename
;
2568 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2569 /* Open the new BFD before freeing the old one, so that
2570 the filename remains live. */
2571 objfile
->obfd
= gdb_bfd_open (obfd_filename
, gnutarget
, -1);
2572 if (objfile
->obfd
== NULL
)
2574 /* We have to make a cleanup and error here, rather
2575 than erroring later, because once we unref OBFD,
2576 OBFD_FILENAME will be freed. */
2577 make_cleanup_bfd_unref (obfd
);
2578 error (_("Can't open %s to read symbols."), obfd_filename
);
2580 gdb_bfd_unref (obfd
);
2583 original_name
= xstrdup (objfile
->original_name
);
2584 make_cleanup (xfree
, original_name
);
2586 /* bfd_openr sets cacheable to true, which is what we want. */
2587 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2588 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2589 bfd_errmsg (bfd_get_error ()));
2591 /* Save the offsets, we will nuke them with the rest of the
2593 num_offsets
= objfile
->num_sections
;
2594 offsets
= ((struct section_offsets
*)
2595 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2596 memcpy (offsets
, objfile
->section_offsets
,
2597 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2599 /* FIXME: Do we have to free a whole linked list, or is this
2601 if (objfile
->global_psymbols
.list
)
2602 xfree (objfile
->global_psymbols
.list
);
2603 memset (&objfile
->global_psymbols
, 0,
2604 sizeof (objfile
->global_psymbols
));
2605 if (objfile
->static_psymbols
.list
)
2606 xfree (objfile
->static_psymbols
.list
);
2607 memset (&objfile
->static_psymbols
, 0,
2608 sizeof (objfile
->static_psymbols
));
2610 /* Free the obstacks for non-reusable objfiles. */
2611 psymbol_bcache_free (objfile
->psymbol_cache
);
2612 objfile
->psymbol_cache
= psymbol_bcache_init ();
2613 obstack_free (&objfile
->objfile_obstack
, 0);
2614 objfile
->sections
= NULL
;
2615 objfile
->compunit_symtabs
= NULL
;
2616 objfile
->psymtabs
= NULL
;
2617 objfile
->psymtabs_addrmap
= NULL
;
2618 objfile
->free_psymtabs
= NULL
;
2619 objfile
->template_symbols
= NULL
;
2621 /* obstack_init also initializes the obstack so it is
2622 empty. We could use obstack_specify_allocation but
2623 gdb_obstack.h specifies the alloc/dealloc functions. */
2624 obstack_init (&objfile
->objfile_obstack
);
2626 /* set_objfile_per_bfd potentially allocates the per-bfd
2627 data on the objfile's obstack (if sharing data across
2628 multiple users is not possible), so it's important to
2629 do it *after* the obstack has been initialized. */
2630 set_objfile_per_bfd (objfile
);
2632 objfile
->original_name
= obstack_copy0 (&objfile
->objfile_obstack
,
2634 strlen (original_name
));
2636 /* Reset the sym_fns pointer. The ELF reader can change it
2637 based on whether .gdb_index is present, and we need it to
2638 start over. PR symtab/15885 */
2639 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2641 build_objfile_section_table (objfile
);
2642 terminate_minimal_symbol_table (objfile
);
2644 /* We use the same section offsets as from last time. I'm not
2645 sure whether that is always correct for shared libraries. */
2646 objfile
->section_offsets
= (struct section_offsets
*)
2647 obstack_alloc (&objfile
->objfile_obstack
,
2648 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2649 memcpy (objfile
->section_offsets
, offsets
,
2650 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2651 objfile
->num_sections
= num_offsets
;
2653 /* What the hell is sym_new_init for, anyway? The concept of
2654 distinguishing between the main file and additional files
2655 in this way seems rather dubious. */
2656 if (objfile
== symfile_objfile
)
2658 (*objfile
->sf
->sym_new_init
) (objfile
);
2661 (*objfile
->sf
->sym_init
) (objfile
);
2662 clear_complaints (&symfile_complaints
, 1, 1);
2664 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2665 read_symbols (objfile
, 0);
2667 if (!objfile_has_symbols (objfile
))
2670 printf_unfiltered (_("(no debugging symbols found)\n"));
2674 /* We're done reading the symbol file; finish off complaints. */
2675 clear_complaints (&symfile_complaints
, 0, 1);
2677 /* Getting new symbols may change our opinion about what is
2680 reinit_frame_cache ();
2682 /* Discard cleanups as symbol reading was successful. */
2683 discard_cleanups (old_cleanups
);
2685 /* If the mtime has changed between the time we set new_modtime
2686 and now, we *want* this to be out of date, so don't call stat
2688 objfile
->mtime
= new_modtime
;
2689 init_entry_point_info (objfile
);
2691 VEC_safe_push (objfilep
, new_objfiles
, objfile
);
2699 /* Notify objfiles that we've modified objfile sections. */
2700 objfiles_changed ();
2702 clear_symtab_users (0);
2704 /* clear_objfile_data for each objfile was called before freeing it and
2705 observer_notify_new_objfile (NULL) has been called by
2706 clear_symtab_users above. Notify the new files now. */
2707 for (ix
= 0; VEC_iterate (objfilep
, new_objfiles
, ix
, objfile
); ix
++)
2708 observer_notify_new_objfile (objfile
);
2710 /* At least one objfile has changed, so we can consider that
2711 the executable we're debugging has changed too. */
2712 observer_notify_executable_changed ();
2715 do_cleanups (all_cleanups
);
2726 static filename_language
*filename_language_table
;
2727 static int fl_table_size
, fl_table_next
;
2730 add_filename_language (char *ext
, enum language lang
)
2732 if (fl_table_next
>= fl_table_size
)
2734 fl_table_size
+= 10;
2735 filename_language_table
=
2736 xrealloc (filename_language_table
,
2737 fl_table_size
* sizeof (*filename_language_table
));
2740 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2741 filename_language_table
[fl_table_next
].lang
= lang
;
2745 static char *ext_args
;
2747 show_ext_args (struct ui_file
*file
, int from_tty
,
2748 struct cmd_list_element
*c
, const char *value
)
2750 fprintf_filtered (file
,
2751 _("Mapping between filename extension "
2752 "and source language is \"%s\".\n"),
2757 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2760 char *cp
= ext_args
;
2763 /* First arg is filename extension, starting with '.' */
2765 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2767 /* Find end of first arg. */
2768 while (*cp
&& !isspace (*cp
))
2772 error (_("'%s': two arguments required -- "
2773 "filename extension and language"),
2776 /* Null-terminate first arg. */
2779 /* Find beginning of second arg, which should be a source language. */
2780 cp
= skip_spaces (cp
);
2783 error (_("'%s': two arguments required -- "
2784 "filename extension and language"),
2787 /* Lookup the language from among those we know. */
2788 lang
= language_enum (cp
);
2790 /* Now lookup the filename extension: do we already know it? */
2791 for (i
= 0; i
< fl_table_next
; i
++)
2792 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2795 if (i
>= fl_table_next
)
2797 /* New file extension. */
2798 add_filename_language (ext_args
, lang
);
2802 /* Redefining a previously known filename extension. */
2805 /* query ("Really make files of type %s '%s'?", */
2806 /* ext_args, language_str (lang)); */
2808 xfree (filename_language_table
[i
].ext
);
2809 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2810 filename_language_table
[i
].lang
= lang
;
2815 info_ext_lang_command (char *args
, int from_tty
)
2819 printf_filtered (_("Filename extensions and the languages they represent:"));
2820 printf_filtered ("\n\n");
2821 for (i
= 0; i
< fl_table_next
; i
++)
2822 printf_filtered ("\t%s\t- %s\n",
2823 filename_language_table
[i
].ext
,
2824 language_str (filename_language_table
[i
].lang
));
2828 init_filename_language_table (void)
2830 if (fl_table_size
== 0) /* Protect against repetition. */
2834 filename_language_table
= XNEWVEC (filename_language
, fl_table_size
);
2836 add_filename_language (".c", language_c
);
2837 add_filename_language (".d", language_d
);
2838 add_filename_language (".C", language_cplus
);
2839 add_filename_language (".cc", language_cplus
);
2840 add_filename_language (".cp", language_cplus
);
2841 add_filename_language (".cpp", language_cplus
);
2842 add_filename_language (".cxx", language_cplus
);
2843 add_filename_language (".c++", language_cplus
);
2844 add_filename_language (".java", language_java
);
2845 add_filename_language (".class", language_java
);
2846 add_filename_language (".m", language_objc
);
2847 add_filename_language (".f", language_fortran
);
2848 add_filename_language (".F", language_fortran
);
2849 add_filename_language (".for", language_fortran
);
2850 add_filename_language (".FOR", language_fortran
);
2851 add_filename_language (".ftn", language_fortran
);
2852 add_filename_language (".FTN", language_fortran
);
2853 add_filename_language (".fpp", language_fortran
);
2854 add_filename_language (".FPP", language_fortran
);
2855 add_filename_language (".f90", language_fortran
);
2856 add_filename_language (".F90", language_fortran
);
2857 add_filename_language (".f95", language_fortran
);
2858 add_filename_language (".F95", language_fortran
);
2859 add_filename_language (".f03", language_fortran
);
2860 add_filename_language (".F03", language_fortran
);
2861 add_filename_language (".f08", language_fortran
);
2862 add_filename_language (".F08", language_fortran
);
2863 add_filename_language (".s", language_asm
);
2864 add_filename_language (".sx", language_asm
);
2865 add_filename_language (".S", language_asm
);
2866 add_filename_language (".pas", language_pascal
);
2867 add_filename_language (".p", language_pascal
);
2868 add_filename_language (".pp", language_pascal
);
2869 add_filename_language (".adb", language_ada
);
2870 add_filename_language (".ads", language_ada
);
2871 add_filename_language (".a", language_ada
);
2872 add_filename_language (".ada", language_ada
);
2873 add_filename_language (".dg", language_ada
);
2878 deduce_language_from_filename (const char *filename
)
2883 if (filename
!= NULL
)
2884 if ((cp
= strrchr (filename
, '.')) != NULL
)
2885 for (i
= 0; i
< fl_table_next
; i
++)
2886 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2887 return filename_language_table
[i
].lang
;
2889 return language_unknown
;
2892 /* Allocate and initialize a new symbol table.
2893 CUST is from the result of allocate_compunit_symtab. */
2896 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2898 struct objfile
*objfile
= cust
->objfile
;
2899 struct symtab
*symtab
2900 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2902 symtab
->filename
= bcache (filename
, strlen (filename
) + 1,
2903 objfile
->per_bfd
->filename_cache
);
2904 symtab
->fullname
= NULL
;
2905 symtab
->language
= deduce_language_from_filename (filename
);
2907 /* This can be very verbose with lots of headers.
2908 Only print at higher debug levels. */
2909 if (symtab_create_debug
>= 2)
2911 /* Be a bit clever with debugging messages, and don't print objfile
2912 every time, only when it changes. */
2913 static char *last_objfile_name
= NULL
;
2915 if (last_objfile_name
== NULL
2916 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2918 xfree (last_objfile_name
);
2919 last_objfile_name
= xstrdup (objfile_name (objfile
));
2920 fprintf_unfiltered (gdb_stdlog
,
2921 "Creating one or more symtabs for objfile %s ...\n",
2924 fprintf_unfiltered (gdb_stdlog
,
2925 "Created symtab %s for module %s.\n",
2926 host_address_to_string (symtab
), filename
);
2929 /* Add it to CUST's list of symtabs. */
2930 if (cust
->filetabs
== NULL
)
2932 cust
->filetabs
= symtab
;
2933 cust
->last_filetab
= symtab
;
2937 cust
->last_filetab
->next
= symtab
;
2938 cust
->last_filetab
= symtab
;
2941 /* Backlink to the containing compunit symtab. */
2942 symtab
->compunit_symtab
= cust
;
2947 /* Allocate and initialize a new compunit.
2948 NAME is the name of the main source file, if there is one, or some
2949 descriptive text if there are no source files. */
2951 struct compunit_symtab
*
2952 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2954 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2955 struct compunit_symtab
);
2956 const char *saved_name
;
2958 cu
->objfile
= objfile
;
2960 /* The name we record here is only for display/debugging purposes.
2961 Just save the basename to avoid path issues (too long for display,
2962 relative vs absolute, etc.). */
2963 saved_name
= lbasename (name
);
2964 cu
->name
= obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2965 strlen (saved_name
));
2967 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2969 if (symtab_create_debug
)
2971 fprintf_unfiltered (gdb_stdlog
,
2972 "Created compunit symtab %s for %s.\n",
2973 host_address_to_string (cu
),
2980 /* Hook CU to the objfile it comes from. */
2983 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2985 cu
->next
= cu
->objfile
->compunit_symtabs
;
2986 cu
->objfile
->compunit_symtabs
= cu
;
2990 /* Reset all data structures in gdb which may contain references to symbol
2991 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2994 clear_symtab_users (int add_flags
)
2996 /* Someday, we should do better than this, by only blowing away
2997 the things that really need to be blown. */
2999 /* Clear the "current" symtab first, because it is no longer valid.
3000 breakpoint_re_set may try to access the current symtab. */
3001 clear_current_source_symtab_and_line ();
3004 clear_last_displayed_sal ();
3005 clear_pc_function_cache ();
3006 observer_notify_new_objfile (NULL
);
3008 /* Clear globals which might have pointed into a removed objfile.
3009 FIXME: It's not clear which of these are supposed to persist
3010 between expressions and which ought to be reset each time. */
3011 expression_context_block
= NULL
;
3012 innermost_block
= NULL
;
3014 /* Varobj may refer to old symbols, perform a cleanup. */
3015 varobj_invalidate ();
3017 /* Now that the various caches have been cleared, we can re_set
3018 our breakpoints without risking it using stale data. */
3019 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
3020 breakpoint_re_set ();
3024 clear_symtab_users_cleanup (void *ignore
)
3026 clear_symtab_users (0);
3030 The following code implements an abstraction for debugging overlay sections.
3032 The target model is as follows:
3033 1) The gnu linker will permit multiple sections to be mapped into the
3034 same VMA, each with its own unique LMA (or load address).
3035 2) It is assumed that some runtime mechanism exists for mapping the
3036 sections, one by one, from the load address into the VMA address.
3037 3) This code provides a mechanism for gdb to keep track of which
3038 sections should be considered to be mapped from the VMA to the LMA.
3039 This information is used for symbol lookup, and memory read/write.
3040 For instance, if a section has been mapped then its contents
3041 should be read from the VMA, otherwise from the LMA.
3043 Two levels of debugger support for overlays are available. One is
3044 "manual", in which the debugger relies on the user to tell it which
3045 overlays are currently mapped. This level of support is
3046 implemented entirely in the core debugger, and the information about
3047 whether a section is mapped is kept in the objfile->obj_section table.
3049 The second level of support is "automatic", and is only available if
3050 the target-specific code provides functionality to read the target's
3051 overlay mapping table, and translate its contents for the debugger
3052 (by updating the mapped state information in the obj_section tables).
3054 The interface is as follows:
3056 overlay map <name> -- tell gdb to consider this section mapped
3057 overlay unmap <name> -- tell gdb to consider this section unmapped
3058 overlay list -- list the sections that GDB thinks are mapped
3059 overlay read-target -- get the target's state of what's mapped
3060 overlay off/manual/auto -- set overlay debugging state
3061 Functional interface:
3062 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3063 section, return that section.
3064 find_pc_overlay(pc): find any overlay section that contains
3065 the pc, either in its VMA or its LMA
3066 section_is_mapped(sect): true if overlay is marked as mapped
3067 section_is_overlay(sect): true if section's VMA != LMA
3068 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3069 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3070 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3071 overlay_mapped_address(...): map an address from section's LMA to VMA
3072 overlay_unmapped_address(...): map an address from section's VMA to LMA
3073 symbol_overlayed_address(...): Return a "current" address for symbol:
3074 either in VMA or LMA depending on whether
3075 the symbol's section is currently mapped. */
3077 /* Overlay debugging state: */
3079 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3080 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
3082 /* Function: section_is_overlay (SECTION)
3083 Returns true if SECTION has VMA not equal to LMA, ie.
3084 SECTION is loaded at an address different from where it will "run". */
3087 section_is_overlay (struct obj_section
*section
)
3089 if (overlay_debugging
&& section
)
3091 bfd
*abfd
= section
->objfile
->obfd
;
3092 asection
*bfd_section
= section
->the_bfd_section
;
3094 if (bfd_section_lma (abfd
, bfd_section
) != 0
3095 && bfd_section_lma (abfd
, bfd_section
)
3096 != bfd_section_vma (abfd
, bfd_section
))
3103 /* Function: overlay_invalidate_all (void)
3104 Invalidate the mapped state of all overlay sections (mark it as stale). */
3107 overlay_invalidate_all (void)
3109 struct objfile
*objfile
;
3110 struct obj_section
*sect
;
3112 ALL_OBJSECTIONS (objfile
, sect
)
3113 if (section_is_overlay (sect
))
3114 sect
->ovly_mapped
= -1;
3117 /* Function: section_is_mapped (SECTION)
3118 Returns true if section is an overlay, and is currently mapped.
3120 Access to the ovly_mapped flag is restricted to this function, so
3121 that we can do automatic update. If the global flag
3122 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3123 overlay_invalidate_all. If the mapped state of the particular
3124 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3127 section_is_mapped (struct obj_section
*osect
)
3129 struct gdbarch
*gdbarch
;
3131 if (osect
== 0 || !section_is_overlay (osect
))
3134 switch (overlay_debugging
)
3138 return 0; /* overlay debugging off */
3139 case ovly_auto
: /* overlay debugging automatic */
3140 /* Unles there is a gdbarch_overlay_update function,
3141 there's really nothing useful to do here (can't really go auto). */
3142 gdbarch
= get_objfile_arch (osect
->objfile
);
3143 if (gdbarch_overlay_update_p (gdbarch
))
3145 if (overlay_cache_invalid
)
3147 overlay_invalidate_all ();
3148 overlay_cache_invalid
= 0;
3150 if (osect
->ovly_mapped
== -1)
3151 gdbarch_overlay_update (gdbarch
, osect
);
3153 /* fall thru to manual case */
3154 case ovly_on
: /* overlay debugging manual */
3155 return osect
->ovly_mapped
== 1;
3159 /* Function: pc_in_unmapped_range
3160 If PC falls into the lma range of SECTION, return true, else false. */
3163 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3165 if (section_is_overlay (section
))
3167 bfd
*abfd
= section
->objfile
->obfd
;
3168 asection
*bfd_section
= section
->the_bfd_section
;
3170 /* We assume the LMA is relocated by the same offset as the VMA. */
3171 bfd_vma size
= bfd_get_section_size (bfd_section
);
3172 CORE_ADDR offset
= obj_section_offset (section
);
3174 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3175 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3182 /* Function: pc_in_mapped_range
3183 If PC falls into the vma range of SECTION, return true, else false. */
3186 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3188 if (section_is_overlay (section
))
3190 if (obj_section_addr (section
) <= pc
3191 && pc
< obj_section_endaddr (section
))
3198 /* Return true if the mapped ranges of sections A and B overlap, false
3202 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3204 CORE_ADDR a_start
= obj_section_addr (a
);
3205 CORE_ADDR a_end
= obj_section_endaddr (a
);
3206 CORE_ADDR b_start
= obj_section_addr (b
);
3207 CORE_ADDR b_end
= obj_section_endaddr (b
);
3209 return (a_start
< b_end
&& b_start
< a_end
);
3212 /* Function: overlay_unmapped_address (PC, SECTION)
3213 Returns the address corresponding to PC in the unmapped (load) range.
3214 May be the same as PC. */
3217 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3219 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3221 bfd
*abfd
= section
->objfile
->obfd
;
3222 asection
*bfd_section
= section
->the_bfd_section
;
3224 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3225 - bfd_section_vma (abfd
, bfd_section
);
3231 /* Function: overlay_mapped_address (PC, SECTION)
3232 Returns the address corresponding to PC in the mapped (runtime) range.
3233 May be the same as PC. */
3236 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3238 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3240 bfd
*abfd
= section
->objfile
->obfd
;
3241 asection
*bfd_section
= section
->the_bfd_section
;
3243 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3244 - bfd_section_lma (abfd
, bfd_section
);
3250 /* Function: symbol_overlayed_address
3251 Return one of two addresses (relative to the VMA or to the LMA),
3252 depending on whether the section is mapped or not. */
3255 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3257 if (overlay_debugging
)
3259 /* If the symbol has no section, just return its regular address. */
3262 /* If the symbol's section is not an overlay, just return its
3264 if (!section_is_overlay (section
))
3266 /* If the symbol's section is mapped, just return its address. */
3267 if (section_is_mapped (section
))
3270 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3271 * then return its LOADED address rather than its vma address!!
3273 return overlay_unmapped_address (address
, section
);
3278 /* Function: find_pc_overlay (PC)
3279 Return the best-match overlay section for PC:
3280 If PC matches a mapped overlay section's VMA, return that section.
3281 Else if PC matches an unmapped section's VMA, return that section.
3282 Else if PC matches an unmapped section's LMA, return that section. */
3284 struct obj_section
*
3285 find_pc_overlay (CORE_ADDR pc
)
3287 struct objfile
*objfile
;
3288 struct obj_section
*osect
, *best_match
= NULL
;
3290 if (overlay_debugging
)
3291 ALL_OBJSECTIONS (objfile
, osect
)
3292 if (section_is_overlay (osect
))
3294 if (pc_in_mapped_range (pc
, osect
))
3296 if (section_is_mapped (osect
))
3301 else if (pc_in_unmapped_range (pc
, osect
))
3307 /* Function: find_pc_mapped_section (PC)
3308 If PC falls into the VMA address range of an overlay section that is
3309 currently marked as MAPPED, return that section. Else return NULL. */
3311 struct obj_section
*
3312 find_pc_mapped_section (CORE_ADDR pc
)
3314 struct objfile
*objfile
;
3315 struct obj_section
*osect
;
3317 if (overlay_debugging
)
3318 ALL_OBJSECTIONS (objfile
, osect
)
3319 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3325 /* Function: list_overlays_command
3326 Print a list of mapped sections and their PC ranges. */
3329 list_overlays_command (char *args
, int from_tty
)
3332 struct objfile
*objfile
;
3333 struct obj_section
*osect
;
3335 if (overlay_debugging
)
3336 ALL_OBJSECTIONS (objfile
, osect
)
3337 if (section_is_mapped (osect
))
3339 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3344 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3345 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3346 size
= bfd_get_section_size (osect
->the_bfd_section
);
3347 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3349 printf_filtered ("Section %s, loaded at ", name
);
3350 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3351 puts_filtered (" - ");
3352 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3353 printf_filtered (", mapped at ");
3354 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3355 puts_filtered (" - ");
3356 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3357 puts_filtered ("\n");
3362 printf_filtered (_("No sections are mapped.\n"));
3365 /* Function: map_overlay_command
3366 Mark the named section as mapped (ie. residing at its VMA address). */
3369 map_overlay_command (char *args
, int from_tty
)
3371 struct objfile
*objfile
, *objfile2
;
3372 struct obj_section
*sec
, *sec2
;
3374 if (!overlay_debugging
)
3375 error (_("Overlay debugging not enabled. Use "
3376 "either the 'overlay auto' or\n"
3377 "the 'overlay manual' command."));
3379 if (args
== 0 || *args
== 0)
3380 error (_("Argument required: name of an overlay section"));
3382 /* First, find a section matching the user supplied argument. */
3383 ALL_OBJSECTIONS (objfile
, sec
)
3384 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3386 /* Now, check to see if the section is an overlay. */
3387 if (!section_is_overlay (sec
))
3388 continue; /* not an overlay section */
3390 /* Mark the overlay as "mapped". */
3391 sec
->ovly_mapped
= 1;
3393 /* Next, make a pass and unmap any sections that are
3394 overlapped by this new section: */
3395 ALL_OBJSECTIONS (objfile2
, sec2
)
3396 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3399 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3400 bfd_section_name (objfile
->obfd
,
3401 sec2
->the_bfd_section
));
3402 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3406 error (_("No overlay section called %s"), args
);
3409 /* Function: unmap_overlay_command
3410 Mark the overlay section as unmapped
3411 (ie. resident in its LMA address range, rather than the VMA range). */
3414 unmap_overlay_command (char *args
, int from_tty
)
3416 struct objfile
*objfile
;
3417 struct obj_section
*sec
= NULL
;
3419 if (!overlay_debugging
)
3420 error (_("Overlay debugging not enabled. "
3421 "Use either the 'overlay auto' or\n"
3422 "the 'overlay manual' command."));
3424 if (args
== 0 || *args
== 0)
3425 error (_("Argument required: name of an overlay section"));
3427 /* First, find a section matching the user supplied argument. */
3428 ALL_OBJSECTIONS (objfile
, sec
)
3429 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3431 if (!sec
->ovly_mapped
)
3432 error (_("Section %s is not mapped"), args
);
3433 sec
->ovly_mapped
= 0;
3436 error (_("No overlay section called %s"), args
);
3439 /* Function: overlay_auto_command
3440 A utility command to turn on overlay debugging.
3441 Possibly this should be done via a set/show command. */
3444 overlay_auto_command (char *args
, int from_tty
)
3446 overlay_debugging
= ovly_auto
;
3447 enable_overlay_breakpoints ();
3449 printf_unfiltered (_("Automatic overlay debugging enabled."));
3452 /* Function: overlay_manual_command
3453 A utility command to turn on overlay debugging.
3454 Possibly this should be done via a set/show command. */
3457 overlay_manual_command (char *args
, int from_tty
)
3459 overlay_debugging
= ovly_on
;
3460 disable_overlay_breakpoints ();
3462 printf_unfiltered (_("Overlay debugging enabled."));
3465 /* Function: overlay_off_command
3466 A utility command to turn on overlay debugging.
3467 Possibly this should be done via a set/show command. */
3470 overlay_off_command (char *args
, int from_tty
)
3472 overlay_debugging
= ovly_off
;
3473 disable_overlay_breakpoints ();
3475 printf_unfiltered (_("Overlay debugging disabled."));
3479 overlay_load_command (char *args
, int from_tty
)
3481 struct gdbarch
*gdbarch
= get_current_arch ();
3483 if (gdbarch_overlay_update_p (gdbarch
))
3484 gdbarch_overlay_update (gdbarch
, NULL
);
3486 error (_("This target does not know how to read its overlay state."));
3489 /* Function: overlay_command
3490 A place-holder for a mis-typed command. */
3492 /* Command list chain containing all defined "overlay" subcommands. */
3493 static struct cmd_list_element
*overlaylist
;
3496 overlay_command (char *args
, int from_tty
)
3499 ("\"overlay\" must be followed by the name of an overlay command.\n");
3500 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3503 /* Target Overlays for the "Simplest" overlay manager:
3505 This is GDB's default target overlay layer. It works with the
3506 minimal overlay manager supplied as an example by Cygnus. The
3507 entry point is via a function pointer "gdbarch_overlay_update",
3508 so targets that use a different runtime overlay manager can
3509 substitute their own overlay_update function and take over the
3512 The overlay_update function pokes around in the target's data structures
3513 to see what overlays are mapped, and updates GDB's overlay mapping with
3516 In this simple implementation, the target data structures are as follows:
3517 unsigned _novlys; /# number of overlay sections #/
3518 unsigned _ovly_table[_novlys][4] = {
3519 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3520 {..., ..., ..., ...},
3522 unsigned _novly_regions; /# number of overlay regions #/
3523 unsigned _ovly_region_table[_novly_regions][3] = {
3524 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3527 These functions will attempt to update GDB's mappedness state in the
3528 symbol section table, based on the target's mappedness state.
3530 To do this, we keep a cached copy of the target's _ovly_table, and
3531 attempt to detect when the cached copy is invalidated. The main
3532 entry point is "simple_overlay_update(SECT), which looks up SECT in
3533 the cached table and re-reads only the entry for that section from
3534 the target (whenever possible). */
3536 /* Cached, dynamically allocated copies of the target data structures: */
3537 static unsigned (*cache_ovly_table
)[4] = 0;
3538 static unsigned cache_novlys
= 0;
3539 static CORE_ADDR cache_ovly_table_base
= 0;
3542 VMA
, OSIZE
, LMA
, MAPPED
3545 /* Throw away the cached copy of _ovly_table. */
3548 simple_free_overlay_table (void)
3550 if (cache_ovly_table
)
3551 xfree (cache_ovly_table
);
3553 cache_ovly_table
= NULL
;
3554 cache_ovly_table_base
= 0;
3557 /* Read an array of ints of size SIZE from the target into a local buffer.
3558 Convert to host order. int LEN is number of ints. */
3561 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3562 int len
, int size
, enum bfd_endian byte_order
)
3564 /* FIXME (alloca): Not safe if array is very large. */
3565 gdb_byte
*buf
= alloca (len
* size
);
3568 read_memory (memaddr
, buf
, len
* size
);
3569 for (i
= 0; i
< len
; i
++)
3570 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3573 /* Find and grab a copy of the target _ovly_table
3574 (and _novlys, which is needed for the table's size). */
3577 simple_read_overlay_table (void)
3579 struct bound_minimal_symbol novlys_msym
;
3580 struct bound_minimal_symbol ovly_table_msym
;
3581 struct gdbarch
*gdbarch
;
3583 enum bfd_endian byte_order
;
3585 simple_free_overlay_table ();
3586 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3587 if (! novlys_msym
.minsym
)
3589 error (_("Error reading inferior's overlay table: "
3590 "couldn't find `_novlys' variable\n"
3591 "in inferior. Use `overlay manual' mode."));
3595 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3596 if (! ovly_table_msym
.minsym
)
3598 error (_("Error reading inferior's overlay table: couldn't find "
3599 "`_ovly_table' array\n"
3600 "in inferior. Use `overlay manual' mode."));
3604 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3605 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3606 byte_order
= gdbarch_byte_order (gdbarch
);
3608 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3611 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3612 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3613 read_target_long_array (cache_ovly_table_base
,
3614 (unsigned int *) cache_ovly_table
,
3615 cache_novlys
* 4, word_size
, byte_order
);
3617 return 1; /* SUCCESS */
3620 /* Function: simple_overlay_update_1
3621 A helper function for simple_overlay_update. Assuming a cached copy
3622 of _ovly_table exists, look through it to find an entry whose vma,
3623 lma and size match those of OSECT. Re-read the entry and make sure
3624 it still matches OSECT (else the table may no longer be valid).
3625 Set OSECT's mapped state to match the entry. Return: 1 for
3626 success, 0 for failure. */
3629 simple_overlay_update_1 (struct obj_section
*osect
)
3632 bfd
*obfd
= osect
->objfile
->obfd
;
3633 asection
*bsect
= osect
->the_bfd_section
;
3634 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3635 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3636 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3638 size
= bfd_get_section_size (osect
->the_bfd_section
);
3639 for (i
= 0; i
< cache_novlys
; i
++)
3640 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3641 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3642 /* && cache_ovly_table[i][OSIZE] == size */ )
3644 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3645 (unsigned int *) cache_ovly_table
[i
],
3646 4, word_size
, byte_order
);
3647 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3648 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3649 /* && cache_ovly_table[i][OSIZE] == size */ )
3651 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3654 else /* Warning! Warning! Target's ovly table has changed! */
3660 /* Function: simple_overlay_update
3661 If OSECT is NULL, then update all sections' mapped state
3662 (after re-reading the entire target _ovly_table).
3663 If OSECT is non-NULL, then try to find a matching entry in the
3664 cached ovly_table and update only OSECT's mapped state.
3665 If a cached entry can't be found or the cache isn't valid, then
3666 re-read the entire cache, and go ahead and update all sections. */
3669 simple_overlay_update (struct obj_section
*osect
)
3671 struct objfile
*objfile
;
3673 /* Were we given an osect to look up? NULL means do all of them. */
3675 /* Have we got a cached copy of the target's overlay table? */
3676 if (cache_ovly_table
!= NULL
)
3678 /* Does its cached location match what's currently in the
3680 struct bound_minimal_symbol minsym
3681 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3683 if (minsym
.minsym
== NULL
)
3684 error (_("Error reading inferior's overlay table: couldn't "
3685 "find `_ovly_table' array\n"
3686 "in inferior. Use `overlay manual' mode."));
3688 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3689 /* Then go ahead and try to look up this single section in
3691 if (simple_overlay_update_1 (osect
))
3692 /* Found it! We're done. */
3696 /* Cached table no good: need to read the entire table anew.
3697 Or else we want all the sections, in which case it's actually
3698 more efficient to read the whole table in one block anyway. */
3700 if (! simple_read_overlay_table ())
3703 /* Now may as well update all sections, even if only one was requested. */
3704 ALL_OBJSECTIONS (objfile
, osect
)
3705 if (section_is_overlay (osect
))
3708 bfd
*obfd
= osect
->objfile
->obfd
;
3709 asection
*bsect
= osect
->the_bfd_section
;
3711 size
= bfd_get_section_size (bsect
);
3712 for (i
= 0; i
< cache_novlys
; i
++)
3713 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3714 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3715 /* && cache_ovly_table[i][OSIZE] == size */ )
3716 { /* obj_section matches i'th entry in ovly_table. */
3717 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3718 break; /* finished with inner for loop: break out. */
3723 /* Set the output sections and output offsets for section SECTP in
3724 ABFD. The relocation code in BFD will read these offsets, so we
3725 need to be sure they're initialized. We map each section to itself,
3726 with no offset; this means that SECTP->vma will be honored. */
3729 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3731 sectp
->output_section
= sectp
;
3732 sectp
->output_offset
= 0;
3735 /* Default implementation for sym_relocate. */
3738 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3741 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3743 bfd
*abfd
= sectp
->owner
;
3745 /* We're only interested in sections with relocation
3747 if ((sectp
->flags
& SEC_RELOC
) == 0)
3750 /* We will handle section offsets properly elsewhere, so relocate as if
3751 all sections begin at 0. */
3752 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3754 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3757 /* Relocate the contents of a debug section SECTP in ABFD. The
3758 contents are stored in BUF if it is non-NULL, or returned in a
3759 malloc'd buffer otherwise.
3761 For some platforms and debug info formats, shared libraries contain
3762 relocations against the debug sections (particularly for DWARF-2;
3763 one affected platform is PowerPC GNU/Linux, although it depends on
3764 the version of the linker in use). Also, ELF object files naturally
3765 have unresolved relocations for their debug sections. We need to apply
3766 the relocations in order to get the locations of symbols correct.
3767 Another example that may require relocation processing, is the
3768 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3772 symfile_relocate_debug_section (struct objfile
*objfile
,
3773 asection
*sectp
, bfd_byte
*buf
)
3775 gdb_assert (objfile
->sf
->sym_relocate
);
3777 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3780 struct symfile_segment_data
*
3781 get_symfile_segment_data (bfd
*abfd
)
3783 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3788 return sf
->sym_segments (abfd
);
3792 free_symfile_segment_data (struct symfile_segment_data
*data
)
3794 xfree (data
->segment_bases
);
3795 xfree (data
->segment_sizes
);
3796 xfree (data
->segment_info
);
3801 - DATA, containing segment addresses from the object file ABFD, and
3802 the mapping from ABFD's sections onto the segments that own them,
3804 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3805 segment addresses reported by the target,
3806 store the appropriate offsets for each section in OFFSETS.
3808 If there are fewer entries in SEGMENT_BASES than there are segments
3809 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3811 If there are more entries, then ignore the extra. The target may
3812 not be able to distinguish between an empty data segment and a
3813 missing data segment; a missing text segment is less plausible. */
3816 symfile_map_offsets_to_segments (bfd
*abfd
,
3817 const struct symfile_segment_data
*data
,
3818 struct section_offsets
*offsets
,
3819 int num_segment_bases
,
3820 const CORE_ADDR
*segment_bases
)
3825 /* It doesn't make sense to call this function unless you have some
3826 segment base addresses. */
3827 gdb_assert (num_segment_bases
> 0);
3829 /* If we do not have segment mappings for the object file, we
3830 can not relocate it by segments. */
3831 gdb_assert (data
!= NULL
);
3832 gdb_assert (data
->num_segments
> 0);
3834 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3836 int which
= data
->segment_info
[i
];
3838 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3840 /* Don't bother computing offsets for sections that aren't
3841 loaded as part of any segment. */
3845 /* Use the last SEGMENT_BASES entry as the address of any extra
3846 segments mentioned in DATA->segment_info. */
3847 if (which
> num_segment_bases
)
3848 which
= num_segment_bases
;
3850 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3851 - data
->segment_bases
[which
- 1]);
3858 symfile_find_segment_sections (struct objfile
*objfile
)
3860 bfd
*abfd
= objfile
->obfd
;
3863 struct symfile_segment_data
*data
;
3865 data
= get_symfile_segment_data (objfile
->obfd
);
3869 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3871 free_symfile_segment_data (data
);
3875 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3877 int which
= data
->segment_info
[i
];
3881 if (objfile
->sect_index_text
== -1)
3882 objfile
->sect_index_text
= sect
->index
;
3884 if (objfile
->sect_index_rodata
== -1)
3885 objfile
->sect_index_rodata
= sect
->index
;
3887 else if (which
== 2)
3889 if (objfile
->sect_index_data
== -1)
3890 objfile
->sect_index_data
= sect
->index
;
3892 if (objfile
->sect_index_bss
== -1)
3893 objfile
->sect_index_bss
= sect
->index
;
3897 free_symfile_segment_data (data
);
3900 /* Listen for free_objfile events. */
3903 symfile_free_objfile (struct objfile
*objfile
)
3905 /* Remove the target sections owned by this objfile. */
3906 if (objfile
!= NULL
)
3907 remove_target_sections ((void *) objfile
);
3910 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3911 Expand all symtabs that match the specified criteria.
3912 See quick_symbol_functions.expand_symtabs_matching for details. */
3915 expand_symtabs_matching (expand_symtabs_file_matcher_ftype
*file_matcher
,
3916 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3917 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3918 enum search_domain kind
,
3921 struct objfile
*objfile
;
3923 ALL_OBJFILES (objfile
)
3926 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3928 expansion_notify
, kind
,
3933 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3934 Map function FUN over every file.
3935 See quick_symbol_functions.map_symbol_filenames for details. */
3938 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3941 struct objfile
*objfile
;
3943 ALL_OBJFILES (objfile
)
3946 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3952 _initialize_symfile (void)
3954 struct cmd_list_element
*c
;
3956 observer_attach_free_objfile (symfile_free_objfile
);
3958 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3959 Load symbol table from executable file FILE.\n\
3960 The `file' command can also load symbol tables, as well as setting the file\n\
3961 to execute."), &cmdlist
);
3962 set_cmd_completer (c
, filename_completer
);
3964 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3965 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3966 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3967 ...]\nADDR is the starting address of the file's text.\n\
3968 The optional arguments are section-name section-address pairs and\n\
3969 should be specified if the data and bss segments are not contiguous\n\
3970 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3972 set_cmd_completer (c
, filename_completer
);
3974 c
= add_cmd ("remove-symbol-file", class_files
,
3975 remove_symbol_file_command
, _("\
3976 Remove a symbol file added via the add-symbol-file command.\n\
3977 Usage: remove-symbol-file FILENAME\n\
3978 remove-symbol-file -a ADDRESS\n\
3979 The file to remove can be identified by its filename or by an address\n\
3980 that lies within the boundaries of this symbol file in memory."),
3983 c
= add_cmd ("load", class_files
, load_command
, _("\
3984 Dynamically load FILE into the running program, and record its symbols\n\
3985 for access from GDB.\n\
3986 A load OFFSET may also be given."), &cmdlist
);
3987 set_cmd_completer (c
, filename_completer
);
3989 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3990 _("Commands for debugging overlays."), &overlaylist
,
3991 "overlay ", 0, &cmdlist
);
3993 add_com_alias ("ovly", "overlay", class_alias
, 1);
3994 add_com_alias ("ov", "overlay", class_alias
, 1);
3996 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3997 _("Assert that an overlay section is mapped."), &overlaylist
);
3999 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
4000 _("Assert that an overlay section is unmapped."), &overlaylist
);
4002 add_cmd ("list-overlays", class_support
, list_overlays_command
,
4003 _("List mappings of overlay sections."), &overlaylist
);
4005 add_cmd ("manual", class_support
, overlay_manual_command
,
4006 _("Enable overlay debugging."), &overlaylist
);
4007 add_cmd ("off", class_support
, overlay_off_command
,
4008 _("Disable overlay debugging."), &overlaylist
);
4009 add_cmd ("auto", class_support
, overlay_auto_command
,
4010 _("Enable automatic overlay debugging."), &overlaylist
);
4011 add_cmd ("load-target", class_support
, overlay_load_command
,
4012 _("Read the overlay mapping state from the target."), &overlaylist
);
4014 /* Filename extension to source language lookup table: */
4015 init_filename_language_table ();
4016 add_setshow_string_noescape_cmd ("extension-language", class_files
,
4018 Set mapping between filename extension and source language."), _("\
4019 Show mapping between filename extension and source language."), _("\
4020 Usage: set extension-language .foo bar"),
4021 set_ext_lang_command
,
4023 &setlist
, &showlist
);
4025 add_info ("extensions", info_ext_lang_command
,
4026 _("All filename extensions associated with a source language."));
4028 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
4029 &debug_file_directory
, _("\
4030 Set the directories where separate debug symbols are searched for."), _("\
4031 Show the directories where separate debug symbols are searched for."), _("\
4032 Separate debug symbols are first searched for in the same\n\
4033 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
4034 and lastly at the path of the directory of the binary with\n\
4035 each global debug-file-directory component prepended."),
4037 show_debug_file_directory
,
4038 &setlist
, &showlist
);
4040 add_setshow_enum_cmd ("symbol-loading", no_class
,
4041 print_symbol_loading_enums
, &print_symbol_loading
,
4043 Set printing of symbol loading messages."), _("\
4044 Show printing of symbol loading messages."), _("\
4045 off == turn all messages off\n\
4046 brief == print messages for the executable,\n\
4047 and brief messages for shared libraries\n\
4048 full == print messages for the executable,\n\
4049 and messages for each shared library."),
4052 &setprintlist
, &showprintlist
);