1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2016 Free Software Foundation, Inc.
5 Contributed by Cygnus Support, using pieces from other GDB modules.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "arch-utils.h"
35 #include "breakpoint.h"
37 #include "complaints.h"
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
47 #include "readline/readline.h"
51 #include "parser-defs.h"
58 #include "cli/cli-utils.h"
60 #include <sys/types.h>
65 #include "gdb_sys_time.h"
69 int (*deprecated_ui_load_progress_hook
) (const char *section
,
71 void (*deprecated_show_load_progress
) (const char *section
,
72 unsigned long section_sent
,
73 unsigned long section_size
,
74 unsigned long total_sent
,
75 unsigned long total_size
);
76 void (*deprecated_pre_add_symbol_hook
) (const char *);
77 void (*deprecated_post_add_symbol_hook
) (void);
79 static void clear_symtab_users_cleanup (void *ignore
);
81 /* Global variables owned by this file. */
82 int readnow_symbol_files
; /* Read full symbols immediately. */
84 /* Functions this file defines. */
86 static void load_command (char *, int);
88 static void symbol_file_add_main_1 (const char *args
, int from_tty
, int flags
);
90 static void add_symbol_file_command (char *, int);
92 static const struct sym_fns
*find_sym_fns (bfd
*);
94 static void decrement_reading_symtab (void *);
96 static void overlay_invalidate_all (void);
98 static void overlay_auto_command (char *, int);
100 static void overlay_manual_command (char *, int);
102 static void overlay_off_command (char *, int);
104 static void overlay_load_command (char *, int);
106 static void overlay_command (char *, int);
108 static void simple_free_overlay_table (void);
110 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
113 static int simple_read_overlay_table (void);
115 static int simple_overlay_update_1 (struct obj_section
*);
117 static void add_filename_language (char *ext
, enum language lang
);
119 static void info_ext_lang_command (char *args
, int from_tty
);
121 static void init_filename_language_table (void);
123 static void symfile_find_segment_sections (struct objfile
*objfile
);
125 void _initialize_symfile (void);
127 /* List of all available sym_fns. On gdb startup, each object file reader
128 calls add_symtab_fns() to register information on each format it is
133 /* BFD flavour that we handle. */
134 enum bfd_flavour sym_flavour
;
136 /* The "vtable" of symbol functions. */
137 const struct sym_fns
*sym_fns
;
138 } registered_sym_fns
;
140 DEF_VEC_O (registered_sym_fns
);
142 static VEC (registered_sym_fns
) *symtab_fns
= NULL
;
144 /* Values for "set print symbol-loading". */
146 const char print_symbol_loading_off
[] = "off";
147 const char print_symbol_loading_brief
[] = "brief";
148 const char print_symbol_loading_full
[] = "full";
149 static const char *print_symbol_loading_enums
[] =
151 print_symbol_loading_off
,
152 print_symbol_loading_brief
,
153 print_symbol_loading_full
,
156 static const char *print_symbol_loading
= print_symbol_loading_full
;
158 /* If non-zero, shared library symbols will be added automatically
159 when the inferior is created, new libraries are loaded, or when
160 attaching to the inferior. This is almost always what users will
161 want to have happen; but for very large programs, the startup time
162 will be excessive, and so if this is a problem, the user can clear
163 this flag and then add the shared library symbols as needed. Note
164 that there is a potential for confusion, since if the shared
165 library symbols are not loaded, commands like "info fun" will *not*
166 report all the functions that are actually present. */
168 int auto_solib_add
= 1;
171 /* Return non-zero if symbol-loading messages should be printed.
172 FROM_TTY is the standard from_tty argument to gdb commands.
173 If EXEC is non-zero the messages are for the executable.
174 Otherwise, messages are for shared libraries.
175 If FULL is non-zero then the caller is printing a detailed message.
176 E.g., the message includes the shared library name.
177 Otherwise, the caller is printing a brief "summary" message. */
180 print_symbol_loading_p (int from_tty
, int exec
, int full
)
182 if (!from_tty
&& !info_verbose
)
187 /* We don't check FULL for executables, there are few such
188 messages, therefore brief == full. */
189 return print_symbol_loading
!= print_symbol_loading_off
;
192 return print_symbol_loading
== print_symbol_loading_full
;
193 return print_symbol_loading
== print_symbol_loading_brief
;
196 /* True if we are reading a symbol table. */
198 int currently_reading_symtab
= 0;
201 decrement_reading_symtab (void *dummy
)
203 currently_reading_symtab
--;
204 gdb_assert (currently_reading_symtab
>= 0);
207 /* Increment currently_reading_symtab and return a cleanup that can be
208 used to decrement it. */
211 increment_reading_symtab (void)
213 ++currently_reading_symtab
;
214 gdb_assert (currently_reading_symtab
> 0);
215 return make_cleanup (decrement_reading_symtab
, NULL
);
218 /* Remember the lowest-addressed loadable section we've seen.
219 This function is called via bfd_map_over_sections.
221 In case of equal vmas, the section with the largest size becomes the
222 lowest-addressed loadable section.
224 If the vmas and sizes are equal, the last section is considered the
225 lowest-addressed loadable section. */
228 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
230 asection
**lowest
= (asection
**) obj
;
232 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
235 *lowest
= sect
; /* First loadable section */
236 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
237 *lowest
= sect
; /* A lower loadable section */
238 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
239 && (bfd_section_size (abfd
, (*lowest
))
240 <= bfd_section_size (abfd
, sect
)))
244 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
245 new object's 'num_sections' field is set to 0; it must be updated
248 struct section_addr_info
*
249 alloc_section_addr_info (size_t num_sections
)
251 struct section_addr_info
*sap
;
254 size
= (sizeof (struct section_addr_info
)
255 + sizeof (struct other_sections
) * (num_sections
- 1));
256 sap
= (struct section_addr_info
*) xmalloc (size
);
257 memset (sap
, 0, size
);
262 /* Build (allocate and populate) a section_addr_info struct from
263 an existing section table. */
265 extern struct section_addr_info
*
266 build_section_addr_info_from_section_table (const struct target_section
*start
,
267 const struct target_section
*end
)
269 struct section_addr_info
*sap
;
270 const struct target_section
*stp
;
273 sap
= alloc_section_addr_info (end
- start
);
275 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
277 struct bfd_section
*asect
= stp
->the_bfd_section
;
278 bfd
*abfd
= asect
->owner
;
280 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
281 && oidx
< end
- start
)
283 sap
->other
[oidx
].addr
= stp
->addr
;
284 sap
->other
[oidx
].name
= xstrdup (bfd_section_name (abfd
, asect
));
285 sap
->other
[oidx
].sectindex
= gdb_bfd_section_index (abfd
, asect
);
290 sap
->num_sections
= oidx
;
295 /* Create a section_addr_info from section offsets in ABFD. */
297 static struct section_addr_info
*
298 build_section_addr_info_from_bfd (bfd
*abfd
)
300 struct section_addr_info
*sap
;
302 struct bfd_section
*sec
;
304 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
305 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
306 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
308 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
309 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
310 sap
->other
[i
].sectindex
= gdb_bfd_section_index (abfd
, sec
);
314 sap
->num_sections
= i
;
319 /* Create a section_addr_info from section offsets in OBJFILE. */
321 struct section_addr_info
*
322 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
324 struct section_addr_info
*sap
;
327 /* Before reread_symbols gets rewritten it is not safe to call:
328 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
330 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
331 for (i
= 0; i
< sap
->num_sections
; i
++)
333 int sectindex
= sap
->other
[i
].sectindex
;
335 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
340 /* Free all memory allocated by build_section_addr_info_from_section_table. */
343 free_section_addr_info (struct section_addr_info
*sap
)
347 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
348 xfree (sap
->other
[idx
].name
);
352 /* Initialize OBJFILE's sect_index_* members. */
355 init_objfile_sect_indices (struct objfile
*objfile
)
360 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
362 objfile
->sect_index_text
= sect
->index
;
364 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
366 objfile
->sect_index_data
= sect
->index
;
368 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
370 objfile
->sect_index_bss
= sect
->index
;
372 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
374 objfile
->sect_index_rodata
= sect
->index
;
376 /* This is where things get really weird... We MUST have valid
377 indices for the various sect_index_* members or gdb will abort.
378 So if for example, there is no ".text" section, we have to
379 accomodate that. First, check for a file with the standard
380 one or two segments. */
382 symfile_find_segment_sections (objfile
);
384 /* Except when explicitly adding symbol files at some address,
385 section_offsets contains nothing but zeros, so it doesn't matter
386 which slot in section_offsets the individual sect_index_* members
387 index into. So if they are all zero, it is safe to just point
388 all the currently uninitialized indices to the first slot. But
389 beware: if this is the main executable, it may be relocated
390 later, e.g. by the remote qOffsets packet, and then this will
391 be wrong! That's why we try segments first. */
393 for (i
= 0; i
< objfile
->num_sections
; i
++)
395 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
400 if (i
== objfile
->num_sections
)
402 if (objfile
->sect_index_text
== -1)
403 objfile
->sect_index_text
= 0;
404 if (objfile
->sect_index_data
== -1)
405 objfile
->sect_index_data
= 0;
406 if (objfile
->sect_index_bss
== -1)
407 objfile
->sect_index_bss
= 0;
408 if (objfile
->sect_index_rodata
== -1)
409 objfile
->sect_index_rodata
= 0;
413 /* The arguments to place_section. */
415 struct place_section_arg
417 struct section_offsets
*offsets
;
421 /* Find a unique offset to use for loadable section SECT if
422 the user did not provide an offset. */
425 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
427 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
428 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
430 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
432 /* We are only interested in allocated sections. */
433 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
436 /* If the user specified an offset, honor it. */
437 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
440 /* Otherwise, let's try to find a place for the section. */
441 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
448 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
450 int indx
= cur_sec
->index
;
452 /* We don't need to compare against ourself. */
456 /* We can only conflict with allocated sections. */
457 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
460 /* If the section offset is 0, either the section has not been placed
461 yet, or it was the lowest section placed (in which case LOWEST
462 will be past its end). */
463 if (offsets
[indx
] == 0)
466 /* If this section would overlap us, then we must move up. */
467 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
468 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
470 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
471 start_addr
= (start_addr
+ align
- 1) & -align
;
476 /* Otherwise, we appear to be OK. So far. */
481 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
482 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
485 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
486 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
490 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
492 const struct section_addr_info
*addrs
)
496 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
498 /* Now calculate offsets for section that were specified by the caller. */
499 for (i
= 0; i
< addrs
->num_sections
; i
++)
501 const struct other_sections
*osp
;
503 osp
= &addrs
->other
[i
];
504 if (osp
->sectindex
== -1)
507 /* Record all sections in offsets. */
508 /* The section_offsets in the objfile are here filled in using
510 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
514 /* Transform section name S for a name comparison. prelink can split section
515 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
516 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
517 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
518 (`.sbss') section has invalid (increased) virtual address. */
521 addr_section_name (const char *s
)
523 if (strcmp (s
, ".dynbss") == 0)
525 if (strcmp (s
, ".sdynbss") == 0)
531 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
532 their (name, sectindex) pair. sectindex makes the sort by name stable. */
535 addrs_section_compar (const void *ap
, const void *bp
)
537 const struct other_sections
*a
= *((struct other_sections
**) ap
);
538 const struct other_sections
*b
= *((struct other_sections
**) bp
);
541 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
545 return a
->sectindex
- b
->sectindex
;
548 /* Provide sorted array of pointers to sections of ADDRS. The array is
549 terminated by NULL. Caller is responsible to call xfree for it. */
551 static struct other_sections
**
552 addrs_section_sort (struct section_addr_info
*addrs
)
554 struct other_sections
**array
;
557 /* `+ 1' for the NULL terminator. */
558 array
= XNEWVEC (struct other_sections
*, addrs
->num_sections
+ 1);
559 for (i
= 0; i
< addrs
->num_sections
; i
++)
560 array
[i
] = &addrs
->other
[i
];
563 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
568 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
569 also SECTINDEXes specific to ABFD there. This function can be used to
570 rebase ADDRS to start referencing different BFD than before. */
573 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
575 asection
*lower_sect
;
576 CORE_ADDR lower_offset
;
578 struct cleanup
*my_cleanup
;
579 struct section_addr_info
*abfd_addrs
;
580 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
581 struct other_sections
**addrs_to_abfd_addrs
;
583 /* Find lowest loadable section to be used as starting point for
584 continguous sections. */
586 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
587 if (lower_sect
== NULL
)
589 warning (_("no loadable sections found in added symbol-file %s"),
590 bfd_get_filename (abfd
));
594 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
596 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
597 in ABFD. Section names are not unique - there can be multiple sections of
598 the same name. Also the sections of the same name do not have to be
599 adjacent to each other. Some sections may be present only in one of the
600 files. Even sections present in both files do not have to be in the same
603 Use stable sort by name for the sections in both files. Then linearly
604 scan both lists matching as most of the entries as possible. */
606 addrs_sorted
= addrs_section_sort (addrs
);
607 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
609 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
610 make_cleanup_free_section_addr_info (abfd_addrs
);
611 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
612 make_cleanup (xfree
, abfd_addrs_sorted
);
614 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
615 ABFD_ADDRS_SORTED. */
617 addrs_to_abfd_addrs
= XCNEWVEC (struct other_sections
*, addrs
->num_sections
);
618 make_cleanup (xfree
, addrs_to_abfd_addrs
);
620 while (*addrs_sorted
)
622 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
624 while (*abfd_addrs_sorted
625 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
629 if (*abfd_addrs_sorted
630 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
635 /* Make the found item directly addressable from ADDRS. */
636 index_in_addrs
= *addrs_sorted
- addrs
->other
;
637 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
638 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
640 /* Never use the same ABFD entry twice. */
647 /* Calculate offsets for the loadable sections.
648 FIXME! Sections must be in order of increasing loadable section
649 so that contiguous sections can use the lower-offset!!!
651 Adjust offsets if the segments are not contiguous.
652 If the section is contiguous, its offset should be set to
653 the offset of the highest loadable section lower than it
654 (the loadable section directly below it in memory).
655 this_offset = lower_offset = lower_addr - lower_orig_addr */
657 for (i
= 0; i
< addrs
->num_sections
; i
++)
659 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
663 /* This is the index used by BFD. */
664 addrs
->other
[i
].sectindex
= sect
->sectindex
;
666 if (addrs
->other
[i
].addr
!= 0)
668 addrs
->other
[i
].addr
-= sect
->addr
;
669 lower_offset
= addrs
->other
[i
].addr
;
672 addrs
->other
[i
].addr
= lower_offset
;
676 /* addr_section_name transformation is not used for SECT_NAME. */
677 const char *sect_name
= addrs
->other
[i
].name
;
679 /* This section does not exist in ABFD, which is normally
680 unexpected and we want to issue a warning.
682 However, the ELF prelinker does create a few sections which are
683 marked in the main executable as loadable (they are loaded in
684 memory from the DYNAMIC segment) and yet are not present in
685 separate debug info files. This is fine, and should not cause
686 a warning. Shared libraries contain just the section
687 ".gnu.liblist" but it is not marked as loadable there. There is
688 no other way to identify them than by their name as the sections
689 created by prelink have no special flags.
691 For the sections `.bss' and `.sbss' see addr_section_name. */
693 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
694 || strcmp (sect_name
, ".gnu.conflict") == 0
695 || (strcmp (sect_name
, ".bss") == 0
697 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
698 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
699 || (strcmp (sect_name
, ".sbss") == 0
701 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
702 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
703 warning (_("section %s not found in %s"), sect_name
,
704 bfd_get_filename (abfd
));
706 addrs
->other
[i
].addr
= 0;
707 addrs
->other
[i
].sectindex
= -1;
711 do_cleanups (my_cleanup
);
714 /* Parse the user's idea of an offset for dynamic linking, into our idea
715 of how to represent it for fast symbol reading. This is the default
716 version of the sym_fns.sym_offsets function for symbol readers that
717 don't need to do anything special. It allocates a section_offsets table
718 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
721 default_symfile_offsets (struct objfile
*objfile
,
722 const struct section_addr_info
*addrs
)
724 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
725 objfile
->section_offsets
= (struct section_offsets
*)
726 obstack_alloc (&objfile
->objfile_obstack
,
727 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
728 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
729 objfile
->num_sections
, addrs
);
731 /* For relocatable files, all loadable sections will start at zero.
732 The zero is meaningless, so try to pick arbitrary addresses such
733 that no loadable sections overlap. This algorithm is quadratic,
734 but the number of sections in a single object file is generally
736 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
738 struct place_section_arg arg
;
739 bfd
*abfd
= objfile
->obfd
;
742 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
743 /* We do not expect this to happen; just skip this step if the
744 relocatable file has a section with an assigned VMA. */
745 if (bfd_section_vma (abfd
, cur_sec
) != 0)
750 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
752 /* Pick non-overlapping offsets for sections the user did not
754 arg
.offsets
= objfile
->section_offsets
;
756 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
758 /* Correctly filling in the section offsets is not quite
759 enough. Relocatable files have two properties that
760 (most) shared objects do not:
762 - Their debug information will contain relocations. Some
763 shared libraries do also, but many do not, so this can not
766 - If there are multiple code sections they will be loaded
767 at different relative addresses in memory than they are
768 in the objfile, since all sections in the file will start
771 Because GDB has very limited ability to map from an
772 address in debug info to the correct code section,
773 it relies on adding SECT_OFF_TEXT to things which might be
774 code. If we clear all the section offsets, and set the
775 section VMAs instead, then symfile_relocate_debug_section
776 will return meaningful debug information pointing at the
779 GDB has too many different data structures for section
780 addresses - a bfd, objfile, and so_list all have section
781 tables, as does exec_ops. Some of these could probably
784 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
785 cur_sec
= cur_sec
->next
)
787 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
790 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
791 exec_set_section_address (bfd_get_filename (abfd
),
793 offsets
[cur_sec
->index
]);
794 offsets
[cur_sec
->index
] = 0;
799 /* Remember the bfd indexes for the .text, .data, .bss and
801 init_objfile_sect_indices (objfile
);
804 /* Divide the file into segments, which are individual relocatable units.
805 This is the default version of the sym_fns.sym_segments function for
806 symbol readers that do not have an explicit representation of segments.
807 It assumes that object files do not have segments, and fully linked
808 files have a single segment. */
810 struct symfile_segment_data
*
811 default_symfile_segments (bfd
*abfd
)
815 struct symfile_segment_data
*data
;
818 /* Relocatable files contain enough information to position each
819 loadable section independently; they should not be relocated
821 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
824 /* Make sure there is at least one loadable section in the file. */
825 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
827 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
835 low
= bfd_get_section_vma (abfd
, sect
);
836 high
= low
+ bfd_get_section_size (sect
);
838 data
= XCNEW (struct symfile_segment_data
);
839 data
->num_segments
= 1;
840 data
->segment_bases
= XCNEW (CORE_ADDR
);
841 data
->segment_sizes
= XCNEW (CORE_ADDR
);
843 num_sections
= bfd_count_sections (abfd
);
844 data
->segment_info
= XCNEWVEC (int, num_sections
);
846 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
850 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
853 vma
= bfd_get_section_vma (abfd
, sect
);
856 if (vma
+ bfd_get_section_size (sect
) > high
)
857 high
= vma
+ bfd_get_section_size (sect
);
859 data
->segment_info
[i
] = 1;
862 data
->segment_bases
[0] = low
;
863 data
->segment_sizes
[0] = high
- low
;
868 /* This is a convenience function to call sym_read for OBJFILE and
869 possibly force the partial symbols to be read. */
872 read_symbols (struct objfile
*objfile
, int add_flags
)
874 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
875 objfile
->per_bfd
->minsyms_read
= 1;
877 /* find_separate_debug_file_in_section should be called only if there is
878 single binary with no existing separate debug info file. */
879 if (!objfile_has_partial_symbols (objfile
)
880 && objfile
->separate_debug_objfile
== NULL
881 && objfile
->separate_debug_objfile_backlink
== NULL
)
883 bfd
*abfd
= find_separate_debug_file_in_section (objfile
);
884 struct cleanup
*cleanup
= make_cleanup_bfd_unref (abfd
);
888 /* find_separate_debug_file_in_section uses the same filename for the
889 virtual section-as-bfd like the bfd filename containing the
890 section. Therefore use also non-canonical name form for the same
891 file containing the section. */
892 symbol_file_add_separate (abfd
, objfile
->original_name
, add_flags
,
896 do_cleanups (cleanup
);
898 if ((add_flags
& SYMFILE_NO_READ
) == 0)
899 require_partial_symbols (objfile
, 0);
902 /* Initialize entry point information for this objfile. */
905 init_entry_point_info (struct objfile
*objfile
)
907 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
913 /* Save startup file's range of PC addresses to help blockframe.c
914 decide where the bottom of the stack is. */
916 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
918 /* Executable file -- record its entry point so we'll recognize
919 the startup file because it contains the entry point. */
920 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
921 ei
->entry_point_p
= 1;
923 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
924 && bfd_get_start_address (objfile
->obfd
) != 0)
926 /* Some shared libraries may have entry points set and be
927 runnable. There's no clear way to indicate this, so just check
928 for values other than zero. */
929 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
930 ei
->entry_point_p
= 1;
934 /* Examination of non-executable.o files. Short-circuit this stuff. */
935 ei
->entry_point_p
= 0;
938 if (ei
->entry_point_p
)
940 struct obj_section
*osect
;
941 CORE_ADDR entry_point
= ei
->entry_point
;
944 /* Make certain that the address points at real code, and not a
945 function descriptor. */
947 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
951 /* Remove any ISA markers, so that this matches entries in the
954 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
957 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
959 struct bfd_section
*sect
= osect
->the_bfd_section
;
961 if (entry_point
>= bfd_get_section_vma (objfile
->obfd
, sect
)
962 && entry_point
< (bfd_get_section_vma (objfile
->obfd
, sect
)
963 + bfd_get_section_size (sect
)))
965 ei
->the_bfd_section_index
966 = gdb_bfd_section_index (objfile
->obfd
, sect
);
973 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
977 /* Process a symbol file, as either the main file or as a dynamically
980 This function does not set the OBJFILE's entry-point info.
982 OBJFILE is where the symbols are to be read from.
984 ADDRS is the list of section load addresses. If the user has given
985 an 'add-symbol-file' command, then this is the list of offsets and
986 addresses he or she provided as arguments to the command; or, if
987 we're handling a shared library, these are the actual addresses the
988 sections are loaded at, according to the inferior's dynamic linker
989 (as gleaned by GDB's shared library code). We convert each address
990 into an offset from the section VMA's as it appears in the object
991 file, and then call the file's sym_offsets function to convert this
992 into a format-specific offset table --- a `struct section_offsets'.
994 ADD_FLAGS encodes verbosity level, whether this is main symbol or
995 an extra symbol file such as dynamically loaded code, and wether
996 breakpoint reset should be deferred. */
999 syms_from_objfile_1 (struct objfile
*objfile
,
1000 struct section_addr_info
*addrs
,
1003 struct section_addr_info
*local_addr
= NULL
;
1004 struct cleanup
*old_chain
;
1005 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1007 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
1009 if (objfile
->sf
== NULL
)
1011 /* No symbols to load, but we still need to make sure
1012 that the section_offsets table is allocated. */
1013 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
1014 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
1016 objfile
->num_sections
= num_sections
;
1017 objfile
->section_offsets
1018 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
1020 memset (objfile
->section_offsets
, 0, size
);
1024 /* Make sure that partially constructed symbol tables will be cleaned up
1025 if an error occurs during symbol reading. */
1026 old_chain
= make_cleanup_free_objfile (objfile
);
1028 /* If ADDRS is NULL, put together a dummy address list.
1029 We now establish the convention that an addr of zero means
1030 no load address was specified. */
1033 local_addr
= alloc_section_addr_info (1);
1034 make_cleanup (xfree
, local_addr
);
1040 /* We will modify the main symbol table, make sure that all its users
1041 will be cleaned up if an error occurs during symbol reading. */
1042 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1044 /* Since no error yet, throw away the old symbol table. */
1046 if (symfile_objfile
!= NULL
)
1048 free_objfile (symfile_objfile
);
1049 gdb_assert (symfile_objfile
== NULL
);
1052 /* Currently we keep symbols from the add-symbol-file command.
1053 If the user wants to get rid of them, they should do "symbol-file"
1054 without arguments first. Not sure this is the best behavior
1057 (*objfile
->sf
->sym_new_init
) (objfile
);
1060 /* Convert addr into an offset rather than an absolute address.
1061 We find the lowest address of a loaded segment in the objfile,
1062 and assume that <addr> is where that got loaded.
1064 We no longer warn if the lowest section is not a text segment (as
1065 happens for the PA64 port. */
1066 if (addrs
->num_sections
> 0)
1067 addr_info_make_relative (addrs
, objfile
->obfd
);
1069 /* Initialize symbol reading routines for this objfile, allow complaints to
1070 appear for this new file, and record how verbose to be, then do the
1071 initial symbol reading for this file. */
1073 (*objfile
->sf
->sym_init
) (objfile
);
1074 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1076 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1078 read_symbols (objfile
, add_flags
);
1080 /* Discard cleanups as symbol reading was successful. */
1082 discard_cleanups (old_chain
);
1086 /* Same as syms_from_objfile_1, but also initializes the objfile
1087 entry-point info. */
1090 syms_from_objfile (struct objfile
*objfile
,
1091 struct section_addr_info
*addrs
,
1094 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1095 init_entry_point_info (objfile
);
1098 /* Perform required actions after either reading in the initial
1099 symbols for a new objfile, or mapping in the symbols from a reusable
1100 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1103 finish_new_objfile (struct objfile
*objfile
, int add_flags
)
1105 /* If this is the main symbol file we have to clean up all users of the
1106 old main symbol file. Otherwise it is sufficient to fixup all the
1107 breakpoints that may have been redefined by this symbol file. */
1108 if (add_flags
& SYMFILE_MAINLINE
)
1110 /* OK, make it the "real" symbol file. */
1111 symfile_objfile
= objfile
;
1113 clear_symtab_users (add_flags
);
1115 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1117 breakpoint_re_set ();
1120 /* We're done reading the symbol file; finish off complaints. */
1121 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1124 /* Process a symbol file, as either the main file or as a dynamically
1127 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1128 A new reference is acquired by this function.
1130 For NAME description see allocate_objfile's definition.
1132 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1133 extra, such as dynamically loaded code, and what to do with breakpoins.
1135 ADDRS is as described for syms_from_objfile_1, above.
1136 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1138 PARENT is the original objfile if ABFD is a separate debug info file.
1139 Otherwise PARENT is NULL.
1141 Upon success, returns a pointer to the objfile that was added.
1142 Upon failure, jumps back to command level (never returns). */
1144 static struct objfile
*
1145 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
, int add_flags
,
1146 struct section_addr_info
*addrs
,
1147 int flags
, struct objfile
*parent
)
1149 struct objfile
*objfile
;
1150 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1151 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1152 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1153 && (readnow_symbol_files
1154 || (add_flags
& SYMFILE_NO_READ
) == 0));
1156 if (readnow_symbol_files
)
1158 flags
|= OBJF_READNOW
;
1159 add_flags
&= ~SYMFILE_NO_READ
;
1162 /* Give user a chance to burp if we'd be
1163 interactively wiping out any existing symbols. */
1165 if ((have_full_symbols () || have_partial_symbols ())
1168 && !query (_("Load new symbol table from \"%s\"? "), name
))
1169 error (_("Not confirmed."));
1171 objfile
= allocate_objfile (abfd
, name
,
1172 flags
| (mainline
? OBJF_MAINLINE
: 0));
1175 add_separate_debug_objfile (objfile
, parent
);
1177 /* We either created a new mapped symbol table, mapped an existing
1178 symbol table file which has not had initial symbol reading
1179 performed, or need to read an unmapped symbol table. */
1182 if (deprecated_pre_add_symbol_hook
)
1183 deprecated_pre_add_symbol_hook (name
);
1186 printf_unfiltered (_("Reading symbols from %s..."), name
);
1188 gdb_flush (gdb_stdout
);
1191 syms_from_objfile (objfile
, addrs
, add_flags
);
1193 /* We now have at least a partial symbol table. Check to see if the
1194 user requested that all symbols be read on initial access via either
1195 the gdb startup command line or on a per symbol file basis. Expand
1196 all partial symbol tables for this objfile if so. */
1198 if ((flags
& OBJF_READNOW
))
1202 printf_unfiltered (_("expanding to full symbols..."));
1204 gdb_flush (gdb_stdout
);
1208 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1211 if (should_print
&& !objfile_has_symbols (objfile
))
1214 printf_unfiltered (_("(no debugging symbols found)..."));
1220 if (deprecated_post_add_symbol_hook
)
1221 deprecated_post_add_symbol_hook ();
1223 printf_unfiltered (_("done.\n"));
1226 /* We print some messages regardless of whether 'from_tty ||
1227 info_verbose' is true, so make sure they go out at the right
1229 gdb_flush (gdb_stdout
);
1231 if (objfile
->sf
== NULL
)
1233 observer_notify_new_objfile (objfile
);
1234 return objfile
; /* No symbols. */
1237 finish_new_objfile (objfile
, add_flags
);
1239 observer_notify_new_objfile (objfile
);
1241 bfd_cache_close_all ();
1245 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1246 see allocate_objfile's definition. */
1249 symbol_file_add_separate (bfd
*bfd
, const char *name
, int symfile_flags
,
1250 struct objfile
*objfile
)
1252 struct objfile
*new_objfile
;
1253 struct section_addr_info
*sap
;
1254 struct cleanup
*my_cleanup
;
1256 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1257 because sections of BFD may not match sections of OBJFILE and because
1258 vma may have been modified by tools such as prelink. */
1259 sap
= build_section_addr_info_from_objfile (objfile
);
1260 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1262 new_objfile
= symbol_file_add_with_addrs
1263 (bfd
, name
, symfile_flags
, sap
,
1264 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1268 do_cleanups (my_cleanup
);
1271 /* Process the symbol file ABFD, as either the main file or as a
1272 dynamically loaded file.
1273 See symbol_file_add_with_addrs's comments for details. */
1276 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
, int add_flags
,
1277 struct section_addr_info
*addrs
,
1278 int flags
, struct objfile
*parent
)
1280 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1284 /* Process a symbol file, as either the main file or as a dynamically
1285 loaded file. See symbol_file_add_with_addrs's comments for details. */
1288 symbol_file_add (const char *name
, int add_flags
,
1289 struct section_addr_info
*addrs
, int flags
)
1291 bfd
*bfd
= symfile_bfd_open (name
);
1292 struct cleanup
*cleanup
= make_cleanup_bfd_unref (bfd
);
1293 struct objfile
*objf
;
1295 objf
= symbol_file_add_from_bfd (bfd
, name
, add_flags
, addrs
, flags
, NULL
);
1296 do_cleanups (cleanup
);
1300 /* Call symbol_file_add() with default values and update whatever is
1301 affected by the loading of a new main().
1302 Used when the file is supplied in the gdb command line
1303 and by some targets with special loading requirements.
1304 The auxiliary function, symbol_file_add_main_1(), has the flags
1305 argument for the switches that can only be specified in the symbol_file
1309 symbol_file_add_main (const char *args
, int from_tty
)
1311 symbol_file_add_main_1 (args
, from_tty
, 0);
1315 symbol_file_add_main_1 (const char *args
, int from_tty
, int flags
)
1317 const int add_flags
= (current_inferior ()->symfile_flags
1318 | SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0));
1320 symbol_file_add (args
, add_flags
, NULL
, flags
);
1322 /* Getting new symbols may change our opinion about
1323 what is frameless. */
1324 reinit_frame_cache ();
1326 if ((flags
& SYMFILE_NO_READ
) == 0)
1327 set_initial_language ();
1331 symbol_file_clear (int from_tty
)
1333 if ((have_full_symbols () || have_partial_symbols ())
1336 ? !query (_("Discard symbol table from `%s'? "),
1337 objfile_name (symfile_objfile
))
1338 : !query (_("Discard symbol table? "))))
1339 error (_("Not confirmed."));
1341 /* solib descriptors may have handles to objfiles. Wipe them before their
1342 objfiles get stale by free_all_objfiles. */
1343 no_shared_libraries (NULL
, from_tty
);
1345 free_all_objfiles ();
1347 gdb_assert (symfile_objfile
== NULL
);
1349 printf_unfiltered (_("No symbol file now.\n"));
1353 separate_debug_file_exists (const char *name
, unsigned long crc
,
1354 struct objfile
*parent_objfile
)
1356 unsigned long file_crc
;
1359 struct stat parent_stat
, abfd_stat
;
1360 int verified_as_different
;
1362 /* Find a separate debug info file as if symbols would be present in
1363 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1364 section can contain just the basename of PARENT_OBJFILE without any
1365 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1366 the separate debug infos with the same basename can exist. */
1368 if (filename_cmp (name
, objfile_name (parent_objfile
)) == 0)
1371 abfd
= gdb_bfd_open (name
, gnutarget
, -1);
1376 /* Verify symlinks were not the cause of filename_cmp name difference above.
1378 Some operating systems, e.g. Windows, do not provide a meaningful
1379 st_ino; they always set it to zero. (Windows does provide a
1380 meaningful st_dev.) Files accessed from gdbservers that do not
1381 support the vFile:fstat packet will also have st_ino set to zero.
1382 Do not indicate a duplicate library in either case. While there
1383 is no guarantee that a system that provides meaningful inode
1384 numbers will never set st_ino to zero, this is merely an
1385 optimization, so we do not need to worry about false negatives. */
1387 if (bfd_stat (abfd
, &abfd_stat
) == 0
1388 && abfd_stat
.st_ino
!= 0
1389 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1391 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1392 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1394 gdb_bfd_unref (abfd
);
1397 verified_as_different
= 1;
1400 verified_as_different
= 0;
1402 file_crc_p
= gdb_bfd_crc (abfd
, &file_crc
);
1404 gdb_bfd_unref (abfd
);
1409 if (crc
!= file_crc
)
1411 unsigned long parent_crc
;
1413 /* If the files could not be verified as different with
1414 bfd_stat then we need to calculate the parent's CRC
1415 to verify whether the files are different or not. */
1417 if (!verified_as_different
)
1419 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1423 if (verified_as_different
|| parent_crc
!= file_crc
)
1424 warning (_("the debug information found in \"%s\""
1425 " does not match \"%s\" (CRC mismatch).\n"),
1426 name
, objfile_name (parent_objfile
));
1434 char *debug_file_directory
= NULL
;
1436 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1437 struct cmd_list_element
*c
, const char *value
)
1439 fprintf_filtered (file
,
1440 _("The directory where separate debug "
1441 "symbols are searched for is \"%s\".\n"),
1445 #if ! defined (DEBUG_SUBDIRECTORY)
1446 #define DEBUG_SUBDIRECTORY ".debug"
1449 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1450 where the original file resides (may not be the same as
1451 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1452 looking for. CANON_DIR is the "realpath" form of DIR.
1453 DIR must contain a trailing '/'.
1454 Returns the path of the file with separate debug info, of NULL. */
1457 find_separate_debug_file (const char *dir
,
1458 const char *canon_dir
,
1459 const char *debuglink
,
1460 unsigned long crc32
, struct objfile
*objfile
)
1465 VEC (char_ptr
) *debugdir_vec
;
1466 struct cleanup
*back_to
;
1469 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1471 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1472 i
= strlen (canon_dir
);
1475 = (char *) xmalloc (strlen (debug_file_directory
) + 1
1477 + strlen (DEBUG_SUBDIRECTORY
)
1479 + strlen (debuglink
)
1482 /* First try in the same directory as the original file. */
1483 strcpy (debugfile
, dir
);
1484 strcat (debugfile
, debuglink
);
1486 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1489 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1490 strcpy (debugfile
, dir
);
1491 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1492 strcat (debugfile
, "/");
1493 strcat (debugfile
, debuglink
);
1495 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1498 /* Then try in the global debugfile directories.
1500 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1501 cause "/..." lookups. */
1503 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1504 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1506 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1508 strcpy (debugfile
, debugdir
);
1509 strcat (debugfile
, "/");
1510 strcat (debugfile
, dir
);
1511 strcat (debugfile
, debuglink
);
1513 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1515 do_cleanups (back_to
);
1519 /* If the file is in the sysroot, try using its base path in the
1520 global debugfile directory. */
1521 if (canon_dir
!= NULL
1522 && filename_ncmp (canon_dir
, gdb_sysroot
,
1523 strlen (gdb_sysroot
)) == 0
1524 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1526 strcpy (debugfile
, debugdir
);
1527 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1528 strcat (debugfile
, "/");
1529 strcat (debugfile
, debuglink
);
1531 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1533 do_cleanups (back_to
);
1539 do_cleanups (back_to
);
1544 /* Modify PATH to contain only "[/]directory/" part of PATH.
1545 If there were no directory separators in PATH, PATH will be empty
1546 string on return. */
1549 terminate_after_last_dir_separator (char *path
)
1553 /* Strip off the final filename part, leaving the directory name,
1554 followed by a slash. The directory can be relative or absolute. */
1555 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1556 if (IS_DIR_SEPARATOR (path
[i
]))
1559 /* If I is -1 then no directory is present there and DIR will be "". */
1563 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1564 Returns pathname, or NULL. */
1567 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1570 char *dir
, *canon_dir
;
1572 unsigned long crc32
;
1573 struct cleanup
*cleanups
;
1575 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1577 if (debuglink
== NULL
)
1579 /* There's no separate debug info, hence there's no way we could
1580 load it => no warning. */
1584 cleanups
= make_cleanup (xfree
, debuglink
);
1585 dir
= xstrdup (objfile_name (objfile
));
1586 make_cleanup (xfree
, dir
);
1587 terminate_after_last_dir_separator (dir
);
1588 canon_dir
= lrealpath (dir
);
1590 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1594 if (debugfile
== NULL
)
1596 /* For PR gdb/9538, try again with realpath (if different from the
1601 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1602 && S_ISLNK (st_buf
.st_mode
))
1606 symlink_dir
= lrealpath (objfile_name (objfile
));
1607 if (symlink_dir
!= NULL
)
1609 make_cleanup (xfree
, symlink_dir
);
1610 terminate_after_last_dir_separator (symlink_dir
);
1611 if (strcmp (dir
, symlink_dir
) != 0)
1613 /* Different directory, so try using it. */
1614 debugfile
= find_separate_debug_file (symlink_dir
,
1624 do_cleanups (cleanups
);
1628 /* This is the symbol-file command. Read the file, analyze its
1629 symbols, and add a struct symtab to a symtab list. The syntax of
1630 the command is rather bizarre:
1632 1. The function buildargv implements various quoting conventions
1633 which are undocumented and have little or nothing in common with
1634 the way things are quoted (or not quoted) elsewhere in GDB.
1636 2. Options are used, which are not generally used in GDB (perhaps
1637 "set mapped on", "set readnow on" would be better)
1639 3. The order of options matters, which is contrary to GNU
1640 conventions (because it is confusing and inconvenient). */
1643 symbol_file_command (char *args
, int from_tty
)
1649 symbol_file_clear (from_tty
);
1653 char **argv
= gdb_buildargv (args
);
1654 int flags
= OBJF_USERLOADED
;
1655 struct cleanup
*cleanups
;
1658 cleanups
= make_cleanup_freeargv (argv
);
1659 while (*argv
!= NULL
)
1661 if (strcmp (*argv
, "-readnow") == 0)
1662 flags
|= OBJF_READNOW
;
1663 else if (**argv
== '-')
1664 error (_("unknown option `%s'"), *argv
);
1667 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1675 error (_("no symbol file name was specified"));
1677 do_cleanups (cleanups
);
1681 /* Set the initial language.
1683 FIXME: A better solution would be to record the language in the
1684 psymtab when reading partial symbols, and then use it (if known) to
1685 set the language. This would be a win for formats that encode the
1686 language in an easily discoverable place, such as DWARF. For
1687 stabs, we can jump through hoops looking for specially named
1688 symbols or try to intuit the language from the specific type of
1689 stabs we find, but we can't do that until later when we read in
1693 set_initial_language (void)
1695 enum language lang
= main_language ();
1697 if (lang
== language_unknown
)
1699 char *name
= main_name ();
1700 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1703 lang
= SYMBOL_LANGUAGE (sym
);
1706 if (lang
== language_unknown
)
1708 /* Make C the default language */
1712 set_language (lang
);
1713 expected_language
= current_language
; /* Don't warn the user. */
1716 /* Open the file specified by NAME and hand it off to BFD for
1717 preliminary analysis. Return a newly initialized bfd *, which
1718 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1719 absolute). In case of trouble, error() is called. */
1722 symfile_bfd_open (const char *name
)
1726 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
1728 if (!is_target_filename (name
))
1730 char *expanded_name
, *absolute_name
;
1732 expanded_name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1734 /* Look down path for it, allocate 2nd new malloc'd copy. */
1735 desc
= openp (getenv ("PATH"),
1736 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1737 expanded_name
, O_RDONLY
| O_BINARY
, &absolute_name
);
1738 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1741 char *exename
= (char *) alloca (strlen (expanded_name
) + 5);
1743 strcat (strcpy (exename
, expanded_name
), ".exe");
1744 desc
= openp (getenv ("PATH"),
1745 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1746 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1751 make_cleanup (xfree
, expanded_name
);
1752 perror_with_name (expanded_name
);
1755 xfree (expanded_name
);
1756 make_cleanup (xfree
, absolute_name
);
1757 name
= absolute_name
;
1760 sym_bfd
= gdb_bfd_open (name
, gnutarget
, desc
);
1762 error (_("`%s': can't open to read symbols: %s."), name
,
1763 bfd_errmsg (bfd_get_error ()));
1765 if (!gdb_bfd_has_target_filename (sym_bfd
))
1766 bfd_set_cacheable (sym_bfd
, 1);
1768 if (!bfd_check_format (sym_bfd
, bfd_object
))
1770 make_cleanup_bfd_unref (sym_bfd
);
1771 error (_("`%s': can't read symbols: %s."), name
,
1772 bfd_errmsg (bfd_get_error ()));
1775 do_cleanups (back_to
);
1780 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1781 the section was not found. */
1784 get_section_index (struct objfile
*objfile
, char *section_name
)
1786 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1794 /* Link SF into the global symtab_fns list.
1795 FLAVOUR is the file format that SF handles.
1796 Called on startup by the _initialize routine in each object file format
1797 reader, to register information about each format the reader is prepared
1801 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1803 registered_sym_fns fns
= { flavour
, sf
};
1805 VEC_safe_push (registered_sym_fns
, symtab_fns
, &fns
);
1808 /* Initialize OBJFILE to read symbols from its associated BFD. It
1809 either returns or calls error(). The result is an initialized
1810 struct sym_fns in the objfile structure, that contains cached
1811 information about the symbol file. */
1813 static const struct sym_fns
*
1814 find_sym_fns (bfd
*abfd
)
1816 registered_sym_fns
*rsf
;
1817 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1820 if (our_flavour
== bfd_target_srec_flavour
1821 || our_flavour
== bfd_target_ihex_flavour
1822 || our_flavour
== bfd_target_tekhex_flavour
)
1823 return NULL
; /* No symbols. */
1825 for (i
= 0; VEC_iterate (registered_sym_fns
, symtab_fns
, i
, rsf
); ++i
)
1826 if (our_flavour
== rsf
->sym_flavour
)
1827 return rsf
->sym_fns
;
1829 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1830 bfd_get_target (abfd
));
1834 /* This function runs the load command of our current target. */
1837 load_command (char *arg
, int from_tty
)
1839 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1843 /* The user might be reloading because the binary has changed. Take
1844 this opportunity to check. */
1845 reopen_exec_file ();
1853 parg
= arg
= get_exec_file (1);
1855 /* Count how many \ " ' tab space there are in the name. */
1856 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1864 /* We need to quote this string so buildargv can pull it apart. */
1865 char *temp
= (char *) xmalloc (strlen (arg
) + count
+ 1 );
1869 make_cleanup (xfree
, temp
);
1872 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1874 strncpy (ptemp
, prev
, parg
- prev
);
1875 ptemp
+= parg
- prev
;
1879 strcpy (ptemp
, prev
);
1885 target_load (arg
, from_tty
);
1887 /* After re-loading the executable, we don't really know which
1888 overlays are mapped any more. */
1889 overlay_cache_invalid
= 1;
1891 do_cleanups (cleanup
);
1894 /* This version of "load" should be usable for any target. Currently
1895 it is just used for remote targets, not inftarg.c or core files,
1896 on the theory that only in that case is it useful.
1898 Avoiding xmodem and the like seems like a win (a) because we don't have
1899 to worry about finding it, and (b) On VMS, fork() is very slow and so
1900 we don't want to run a subprocess. On the other hand, I'm not sure how
1901 performance compares. */
1903 static int validate_download
= 0;
1905 /* Callback service function for generic_load (bfd_map_over_sections). */
1908 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1910 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1912 *sum
+= bfd_get_section_size (asec
);
1915 /* Opaque data for load_section_callback. */
1916 struct load_section_data
{
1917 CORE_ADDR load_offset
;
1918 struct load_progress_data
*progress_data
;
1919 VEC(memory_write_request_s
) *requests
;
1922 /* Opaque data for load_progress. */
1923 struct load_progress_data
{
1924 /* Cumulative data. */
1925 unsigned long write_count
;
1926 unsigned long data_count
;
1927 bfd_size_type total_size
;
1930 /* Opaque data for load_progress for a single section. */
1931 struct load_progress_section_data
{
1932 struct load_progress_data
*cumulative
;
1934 /* Per-section data. */
1935 const char *section_name
;
1936 ULONGEST section_sent
;
1937 ULONGEST section_size
;
1942 /* Target write callback routine for progress reporting. */
1945 load_progress (ULONGEST bytes
, void *untyped_arg
)
1947 struct load_progress_section_data
*args
1948 = (struct load_progress_section_data
*) untyped_arg
;
1949 struct load_progress_data
*totals
;
1952 /* Writing padding data. No easy way to get at the cumulative
1953 stats, so just ignore this. */
1956 totals
= args
->cumulative
;
1958 if (bytes
== 0 && args
->section_sent
== 0)
1960 /* The write is just starting. Let the user know we've started
1962 ui_out_message (current_uiout
, 0, "Loading section %s, size %s lma %s\n",
1963 args
->section_name
, hex_string (args
->section_size
),
1964 paddress (target_gdbarch (), args
->lma
));
1968 if (validate_download
)
1970 /* Broken memories and broken monitors manifest themselves here
1971 when bring new computers to life. This doubles already slow
1973 /* NOTE: cagney/1999-10-18: A more efficient implementation
1974 might add a verify_memory() method to the target vector and
1975 then use that. remote.c could implement that method using
1976 the ``qCRC'' packet. */
1977 gdb_byte
*check
= (gdb_byte
*) xmalloc (bytes
);
1978 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1980 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1981 error (_("Download verify read failed at %s"),
1982 paddress (target_gdbarch (), args
->lma
));
1983 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1984 error (_("Download verify compare failed at %s"),
1985 paddress (target_gdbarch (), args
->lma
));
1986 do_cleanups (verify_cleanups
);
1988 totals
->data_count
+= bytes
;
1990 args
->buffer
+= bytes
;
1991 totals
->write_count
+= 1;
1992 args
->section_sent
+= bytes
;
1993 if (check_quit_flag ()
1994 || (deprecated_ui_load_progress_hook
!= NULL
1995 && deprecated_ui_load_progress_hook (args
->section_name
,
1996 args
->section_sent
)))
1997 error (_("Canceled the download"));
1999 if (deprecated_show_load_progress
!= NULL
)
2000 deprecated_show_load_progress (args
->section_name
,
2004 totals
->total_size
);
2007 /* Callback service function for generic_load (bfd_map_over_sections). */
2010 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
2012 struct memory_write_request
*new_request
;
2013 struct load_section_data
*args
= (struct load_section_data
*) data
;
2014 struct load_progress_section_data
*section_data
;
2015 bfd_size_type size
= bfd_get_section_size (asec
);
2017 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
2019 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
2025 new_request
= VEC_safe_push (memory_write_request_s
,
2026 args
->requests
, NULL
);
2027 memset (new_request
, 0, sizeof (struct memory_write_request
));
2028 section_data
= XCNEW (struct load_progress_section_data
);
2029 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
2030 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
2032 new_request
->data
= (gdb_byte
*) xmalloc (size
);
2033 new_request
->baton
= section_data
;
2035 buffer
= new_request
->data
;
2037 section_data
->cumulative
= args
->progress_data
;
2038 section_data
->section_name
= sect_name
;
2039 section_data
->section_size
= size
;
2040 section_data
->lma
= new_request
->begin
;
2041 section_data
->buffer
= buffer
;
2043 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2046 /* Clean up an entire memory request vector, including load
2047 data and progress records. */
2050 clear_memory_write_data (void *arg
)
2052 VEC(memory_write_request_s
) **vec_p
= (VEC(memory_write_request_s
) **) arg
;
2053 VEC(memory_write_request_s
) *vec
= *vec_p
;
2055 struct memory_write_request
*mr
;
2057 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2062 VEC_free (memory_write_request_s
, vec
);
2066 generic_load (const char *args
, int from_tty
)
2069 struct timeval start_time
, end_time
;
2071 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2072 struct load_section_data cbdata
;
2073 struct load_progress_data total_progress
;
2074 struct ui_out
*uiout
= current_uiout
;
2079 memset (&cbdata
, 0, sizeof (cbdata
));
2080 memset (&total_progress
, 0, sizeof (total_progress
));
2081 cbdata
.progress_data
= &total_progress
;
2083 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2086 error_no_arg (_("file to load"));
2088 argv
= gdb_buildargv (args
);
2089 make_cleanup_freeargv (argv
);
2091 filename
= tilde_expand (argv
[0]);
2092 make_cleanup (xfree
, filename
);
2094 if (argv
[1] != NULL
)
2098 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2100 /* If the last word was not a valid number then
2101 treat it as a file name with spaces in. */
2102 if (argv
[1] == endptr
)
2103 error (_("Invalid download offset:%s."), argv
[1]);
2105 if (argv
[2] != NULL
)
2106 error (_("Too many parameters."));
2109 /* Open the file for loading. */
2110 loadfile_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2111 if (loadfile_bfd
== NULL
)
2113 perror_with_name (filename
);
2117 make_cleanup_bfd_unref (loadfile_bfd
);
2119 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2121 error (_("\"%s\" is not an object file: %s"), filename
,
2122 bfd_errmsg (bfd_get_error ()));
2125 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2126 (void *) &total_progress
.total_size
);
2128 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2130 gettimeofday (&start_time
, NULL
);
2132 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2133 load_progress
) != 0)
2134 error (_("Load failed"));
2136 gettimeofday (&end_time
, NULL
);
2138 entry
= bfd_get_start_address (loadfile_bfd
);
2139 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2140 ui_out_text (uiout
, "Start address ");
2141 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch (), entry
));
2142 ui_out_text (uiout
, ", load size ");
2143 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2144 ui_out_text (uiout
, "\n");
2145 /* We were doing this in remote-mips.c, I suspect it is right
2146 for other targets too. */
2147 regcache_write_pc (get_current_regcache (), entry
);
2149 /* Reset breakpoints, now that we have changed the load image. For
2150 instance, breakpoints may have been set (or reset, by
2151 post_create_inferior) while connected to the target but before we
2152 loaded the program. In that case, the prologue analyzer could
2153 have read instructions from the target to find the right
2154 breakpoint locations. Loading has changed the contents of that
2157 breakpoint_re_set ();
2159 /* FIXME: are we supposed to call symbol_file_add or not? According
2160 to a comment from remote-mips.c (where a call to symbol_file_add
2161 was commented out), making the call confuses GDB if more than one
2162 file is loaded in. Some targets do (e.g., remote-vx.c) but
2163 others don't (or didn't - perhaps they have all been deleted). */
2165 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2166 total_progress
.write_count
,
2167 &start_time
, &end_time
);
2169 do_cleanups (old_cleanups
);
2172 /* Report how fast the transfer went. */
2175 print_transfer_performance (struct ui_file
*stream
,
2176 unsigned long data_count
,
2177 unsigned long write_count
,
2178 const struct timeval
*start_time
,
2179 const struct timeval
*end_time
)
2181 ULONGEST time_count
;
2182 struct ui_out
*uiout
= current_uiout
;
2184 /* Compute the elapsed time in milliseconds, as a tradeoff between
2185 accuracy and overflow. */
2186 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2187 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2189 ui_out_text (uiout
, "Transfer rate: ");
2192 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2194 if (ui_out_is_mi_like_p (uiout
))
2196 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2197 ui_out_text (uiout
, " bits/sec");
2199 else if (rate
< 1024)
2201 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2202 ui_out_text (uiout
, " bytes/sec");
2206 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2207 ui_out_text (uiout
, " KB/sec");
2212 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2213 ui_out_text (uiout
, " bits in <1 sec");
2215 if (write_count
> 0)
2217 ui_out_text (uiout
, ", ");
2218 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2219 ui_out_text (uiout
, " bytes/write");
2221 ui_out_text (uiout
, ".\n");
2224 /* This function allows the addition of incrementally linked object files.
2225 It does not modify any state in the target, only in the debugger. */
2226 /* Note: ezannoni 2000-04-13 This function/command used to have a
2227 special case syntax for the rombug target (Rombug is the boot
2228 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2229 rombug case, the user doesn't need to supply a text address,
2230 instead a call to target_link() (in target.c) would supply the
2231 value to use. We are now discontinuing this type of ad hoc syntax. */
2234 add_symbol_file_command (char *args
, int from_tty
)
2236 struct gdbarch
*gdbarch
= get_current_arch ();
2237 char *filename
= NULL
;
2238 int flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2240 int section_index
= 0;
2244 int expecting_sec_name
= 0;
2245 int expecting_sec_addr
= 0;
2247 struct objfile
*objf
;
2255 struct section_addr_info
*section_addrs
;
2256 struct sect_opt
*sect_opts
= NULL
;
2257 size_t num_sect_opts
= 0;
2258 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2261 sect_opts
= XNEWVEC (struct sect_opt
, num_sect_opts
);
2266 error (_("add-symbol-file takes a file name and an address"));
2268 argv
= gdb_buildargv (args
);
2269 make_cleanup_freeargv (argv
);
2271 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2273 /* Process the argument. */
2276 /* The first argument is the file name. */
2277 filename
= tilde_expand (arg
);
2278 make_cleanup (xfree
, filename
);
2280 else if (argcnt
== 1)
2282 /* The second argument is always the text address at which
2283 to load the program. */
2284 sect_opts
[section_index
].name
= ".text";
2285 sect_opts
[section_index
].value
= arg
;
2286 if (++section_index
>= num_sect_opts
)
2289 sect_opts
= ((struct sect_opt
*)
2290 xrealloc (sect_opts
,
2292 * sizeof (struct sect_opt
)));
2297 /* It's an option (starting with '-') or it's an argument
2299 if (expecting_sec_name
)
2301 sect_opts
[section_index
].name
= arg
;
2302 expecting_sec_name
= 0;
2304 else if (expecting_sec_addr
)
2306 sect_opts
[section_index
].value
= arg
;
2307 expecting_sec_addr
= 0;
2308 if (++section_index
>= num_sect_opts
)
2311 sect_opts
= ((struct sect_opt
*)
2312 xrealloc (sect_opts
,
2314 * sizeof (struct sect_opt
)));
2317 else if (strcmp (arg
, "-readnow") == 0)
2318 flags
|= OBJF_READNOW
;
2319 else if (strcmp (arg
, "-s") == 0)
2321 expecting_sec_name
= 1;
2322 expecting_sec_addr
= 1;
2325 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2326 " [-readnow] [-s <secname> <addr>]*"));
2330 /* This command takes at least two arguments. The first one is a
2331 filename, and the second is the address where this file has been
2332 loaded. Abort now if this address hasn't been provided by the
2334 if (section_index
< 1)
2335 error (_("The address where %s has been loaded is missing"), filename
);
2337 /* Print the prompt for the query below. And save the arguments into
2338 a sect_addr_info structure to be passed around to other
2339 functions. We have to split this up into separate print
2340 statements because hex_string returns a local static
2343 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2344 section_addrs
= alloc_section_addr_info (section_index
);
2345 make_cleanup (xfree
, section_addrs
);
2346 for (i
= 0; i
< section_index
; i
++)
2349 char *val
= sect_opts
[i
].value
;
2350 char *sec
= sect_opts
[i
].name
;
2352 addr
= parse_and_eval_address (val
);
2354 /* Here we store the section offsets in the order they were
2355 entered on the command line. */
2356 section_addrs
->other
[sec_num
].name
= sec
;
2357 section_addrs
->other
[sec_num
].addr
= addr
;
2358 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2359 paddress (gdbarch
, addr
));
2362 /* The object's sections are initialized when a
2363 call is made to build_objfile_section_table (objfile).
2364 This happens in reread_symbols.
2365 At this point, we don't know what file type this is,
2366 so we can't determine what section names are valid. */
2368 section_addrs
->num_sections
= sec_num
;
2370 if (from_tty
&& (!query ("%s", "")))
2371 error (_("Not confirmed."));
2373 objf
= symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2374 section_addrs
, flags
);
2376 add_target_sections_of_objfile (objf
);
2378 /* Getting new symbols may change our opinion about what is
2380 reinit_frame_cache ();
2381 do_cleanups (my_cleanups
);
2385 /* This function removes a symbol file that was added via add-symbol-file. */
2388 remove_symbol_file_command (char *args
, int from_tty
)
2391 struct objfile
*objf
= NULL
;
2392 struct cleanup
*my_cleanups
;
2393 struct program_space
*pspace
= current_program_space
;
2394 struct gdbarch
*gdbarch
= get_current_arch ();
2399 error (_("remove-symbol-file: no symbol file provided"));
2401 my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2403 argv
= gdb_buildargv (args
);
2405 if (strcmp (argv
[0], "-a") == 0)
2407 /* Interpret the next argument as an address. */
2410 if (argv
[1] == NULL
)
2411 error (_("Missing address argument"));
2413 if (argv
[2] != NULL
)
2414 error (_("Junk after %s"), argv
[1]);
2416 addr
= parse_and_eval_address (argv
[1]);
2420 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2421 && (objf
->flags
& OBJF_SHARED
) != 0
2422 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2426 else if (argv
[0] != NULL
)
2428 /* Interpret the current argument as a file name. */
2431 if (argv
[1] != NULL
)
2432 error (_("Junk after %s"), argv
[0]);
2434 filename
= tilde_expand (argv
[0]);
2435 make_cleanup (xfree
, filename
);
2439 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2440 && (objf
->flags
& OBJF_SHARED
) != 0
2441 && objf
->pspace
== pspace
2442 && filename_cmp (filename
, objfile_name (objf
)) == 0)
2448 error (_("No symbol file found"));
2451 && !query (_("Remove symbol table from file \"%s\"? "),
2452 objfile_name (objf
)))
2453 error (_("Not confirmed."));
2455 free_objfile (objf
);
2456 clear_symtab_users (0);
2458 do_cleanups (my_cleanups
);
2461 typedef struct objfile
*objfilep
;
2463 DEF_VEC_P (objfilep
);
2465 /* Re-read symbols if a symbol-file has changed. */
2468 reread_symbols (void)
2470 struct objfile
*objfile
;
2472 struct stat new_statbuf
;
2474 VEC (objfilep
) *new_objfiles
= NULL
;
2475 struct cleanup
*all_cleanups
;
2477 all_cleanups
= make_cleanup (VEC_cleanup (objfilep
), &new_objfiles
);
2479 /* With the addition of shared libraries, this should be modified,
2480 the load time should be saved in the partial symbol tables, since
2481 different tables may come from different source files. FIXME.
2482 This routine should then walk down each partial symbol table
2483 and see if the symbol table that it originates from has been changed. */
2485 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2487 if (objfile
->obfd
== NULL
)
2490 /* Separate debug objfiles are handled in the main objfile. */
2491 if (objfile
->separate_debug_objfile_backlink
)
2494 /* If this object is from an archive (what you usually create with
2495 `ar', often called a `static library' on most systems, though
2496 a `shared library' on AIX is also an archive), then you should
2497 stat on the archive name, not member name. */
2498 if (objfile
->obfd
->my_archive
)
2499 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2501 res
= stat (objfile_name (objfile
), &new_statbuf
);
2504 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2505 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2506 objfile_name (objfile
));
2509 new_modtime
= new_statbuf
.st_mtime
;
2510 if (new_modtime
!= objfile
->mtime
)
2512 struct cleanup
*old_cleanups
;
2513 struct section_offsets
*offsets
;
2515 char *original_name
;
2517 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2518 objfile_name (objfile
));
2520 /* There are various functions like symbol_file_add,
2521 symfile_bfd_open, syms_from_objfile, etc., which might
2522 appear to do what we want. But they have various other
2523 effects which we *don't* want. So we just do stuff
2524 ourselves. We don't worry about mapped files (for one thing,
2525 any mapped file will be out of date). */
2527 /* If we get an error, blow away this objfile (not sure if
2528 that is the correct response for things like shared
2530 old_cleanups
= make_cleanup_free_objfile (objfile
);
2531 /* We need to do this whenever any symbols go away. */
2532 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2534 if (exec_bfd
!= NULL
2535 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2536 bfd_get_filename (exec_bfd
)) == 0)
2538 /* Reload EXEC_BFD without asking anything. */
2540 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2543 /* Keep the calls order approx. the same as in free_objfile. */
2545 /* Free the separate debug objfiles. It will be
2546 automatically recreated by sym_read. */
2547 free_objfile_separate_debug (objfile
);
2549 /* Remove any references to this objfile in the global
2551 preserve_values (objfile
);
2553 /* Nuke all the state that we will re-read. Much of the following
2554 code which sets things to NULL really is necessary to tell
2555 other parts of GDB that there is nothing currently there.
2557 Try to keep the freeing order compatible with free_objfile. */
2559 if (objfile
->sf
!= NULL
)
2561 (*objfile
->sf
->sym_finish
) (objfile
);
2564 clear_objfile_data (objfile
);
2566 /* Clean up any state BFD has sitting around. */
2568 struct bfd
*obfd
= objfile
->obfd
;
2569 char *obfd_filename
;
2571 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2572 /* Open the new BFD before freeing the old one, so that
2573 the filename remains live. */
2574 objfile
->obfd
= gdb_bfd_open (obfd_filename
, gnutarget
, -1);
2575 if (objfile
->obfd
== NULL
)
2577 /* We have to make a cleanup and error here, rather
2578 than erroring later, because once we unref OBFD,
2579 OBFD_FILENAME will be freed. */
2580 make_cleanup_bfd_unref (obfd
);
2581 error (_("Can't open %s to read symbols."), obfd_filename
);
2583 gdb_bfd_unref (obfd
);
2586 original_name
= xstrdup (objfile
->original_name
);
2587 make_cleanup (xfree
, original_name
);
2589 /* bfd_openr sets cacheable to true, which is what we want. */
2590 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2591 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2592 bfd_errmsg (bfd_get_error ()));
2594 /* Save the offsets, we will nuke them with the rest of the
2596 num_offsets
= objfile
->num_sections
;
2597 offsets
= ((struct section_offsets
*)
2598 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2599 memcpy (offsets
, objfile
->section_offsets
,
2600 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2602 /* FIXME: Do we have to free a whole linked list, or is this
2604 if (objfile
->global_psymbols
.list
)
2605 xfree (objfile
->global_psymbols
.list
);
2606 memset (&objfile
->global_psymbols
, 0,
2607 sizeof (objfile
->global_psymbols
));
2608 if (objfile
->static_psymbols
.list
)
2609 xfree (objfile
->static_psymbols
.list
);
2610 memset (&objfile
->static_psymbols
, 0,
2611 sizeof (objfile
->static_psymbols
));
2613 /* Free the obstacks for non-reusable objfiles. */
2614 psymbol_bcache_free (objfile
->psymbol_cache
);
2615 objfile
->psymbol_cache
= psymbol_bcache_init ();
2616 obstack_free (&objfile
->objfile_obstack
, 0);
2617 objfile
->sections
= NULL
;
2618 objfile
->compunit_symtabs
= NULL
;
2619 objfile
->psymtabs
= NULL
;
2620 objfile
->psymtabs_addrmap
= NULL
;
2621 objfile
->free_psymtabs
= NULL
;
2622 objfile
->template_symbols
= NULL
;
2624 /* obstack_init also initializes the obstack so it is
2625 empty. We could use obstack_specify_allocation but
2626 gdb_obstack.h specifies the alloc/dealloc functions. */
2627 obstack_init (&objfile
->objfile_obstack
);
2629 /* set_objfile_per_bfd potentially allocates the per-bfd
2630 data on the objfile's obstack (if sharing data across
2631 multiple users is not possible), so it's important to
2632 do it *after* the obstack has been initialized. */
2633 set_objfile_per_bfd (objfile
);
2635 objfile
->original_name
2636 = (char *) obstack_copy0 (&objfile
->objfile_obstack
, original_name
,
2637 strlen (original_name
));
2639 /* Reset the sym_fns pointer. The ELF reader can change it
2640 based on whether .gdb_index is present, and we need it to
2641 start over. PR symtab/15885 */
2642 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2644 build_objfile_section_table (objfile
);
2645 terminate_minimal_symbol_table (objfile
);
2647 /* We use the same section offsets as from last time. I'm not
2648 sure whether that is always correct for shared libraries. */
2649 objfile
->section_offsets
= (struct section_offsets
*)
2650 obstack_alloc (&objfile
->objfile_obstack
,
2651 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2652 memcpy (objfile
->section_offsets
, offsets
,
2653 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2654 objfile
->num_sections
= num_offsets
;
2656 /* What the hell is sym_new_init for, anyway? The concept of
2657 distinguishing between the main file and additional files
2658 in this way seems rather dubious. */
2659 if (objfile
== symfile_objfile
)
2661 (*objfile
->sf
->sym_new_init
) (objfile
);
2664 (*objfile
->sf
->sym_init
) (objfile
);
2665 clear_complaints (&symfile_complaints
, 1, 1);
2667 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2668 read_symbols (objfile
, 0);
2670 if (!objfile_has_symbols (objfile
))
2673 printf_unfiltered (_("(no debugging symbols found)\n"));
2677 /* We're done reading the symbol file; finish off complaints. */
2678 clear_complaints (&symfile_complaints
, 0, 1);
2680 /* Getting new symbols may change our opinion about what is
2683 reinit_frame_cache ();
2685 /* Discard cleanups as symbol reading was successful. */
2686 discard_cleanups (old_cleanups
);
2688 /* If the mtime has changed between the time we set new_modtime
2689 and now, we *want* this to be out of date, so don't call stat
2691 objfile
->mtime
= new_modtime
;
2692 init_entry_point_info (objfile
);
2694 VEC_safe_push (objfilep
, new_objfiles
, objfile
);
2702 /* Notify objfiles that we've modified objfile sections. */
2703 objfiles_changed ();
2705 clear_symtab_users (0);
2707 /* clear_objfile_data for each objfile was called before freeing it and
2708 observer_notify_new_objfile (NULL) has been called by
2709 clear_symtab_users above. Notify the new files now. */
2710 for (ix
= 0; VEC_iterate (objfilep
, new_objfiles
, ix
, objfile
); ix
++)
2711 observer_notify_new_objfile (objfile
);
2713 /* At least one objfile has changed, so we can consider that
2714 the executable we're debugging has changed too. */
2715 observer_notify_executable_changed ();
2718 do_cleanups (all_cleanups
);
2729 static filename_language
*filename_language_table
;
2730 static int fl_table_size
, fl_table_next
;
2733 add_filename_language (char *ext
, enum language lang
)
2735 if (fl_table_next
>= fl_table_size
)
2737 fl_table_size
+= 10;
2738 filename_language_table
= XRESIZEVEC (filename_language
,
2739 filename_language_table
,
2743 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2744 filename_language_table
[fl_table_next
].lang
= lang
;
2748 static char *ext_args
;
2750 show_ext_args (struct ui_file
*file
, int from_tty
,
2751 struct cmd_list_element
*c
, const char *value
)
2753 fprintf_filtered (file
,
2754 _("Mapping between filename extension "
2755 "and source language is \"%s\".\n"),
2760 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2763 char *cp
= ext_args
;
2766 /* First arg is filename extension, starting with '.' */
2768 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2770 /* Find end of first arg. */
2771 while (*cp
&& !isspace (*cp
))
2775 error (_("'%s': two arguments required -- "
2776 "filename extension and language"),
2779 /* Null-terminate first arg. */
2782 /* Find beginning of second arg, which should be a source language. */
2783 cp
= skip_spaces (cp
);
2786 error (_("'%s': two arguments required -- "
2787 "filename extension and language"),
2790 /* Lookup the language from among those we know. */
2791 lang
= language_enum (cp
);
2793 /* Now lookup the filename extension: do we already know it? */
2794 for (i
= 0; i
< fl_table_next
; i
++)
2795 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2798 if (i
>= fl_table_next
)
2800 /* New file extension. */
2801 add_filename_language (ext_args
, lang
);
2805 /* Redefining a previously known filename extension. */
2808 /* query ("Really make files of type %s '%s'?", */
2809 /* ext_args, language_str (lang)); */
2811 xfree (filename_language_table
[i
].ext
);
2812 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2813 filename_language_table
[i
].lang
= lang
;
2818 info_ext_lang_command (char *args
, int from_tty
)
2822 printf_filtered (_("Filename extensions and the languages they represent:"));
2823 printf_filtered ("\n\n");
2824 for (i
= 0; i
< fl_table_next
; i
++)
2825 printf_filtered ("\t%s\t- %s\n",
2826 filename_language_table
[i
].ext
,
2827 language_str (filename_language_table
[i
].lang
));
2831 init_filename_language_table (void)
2833 if (fl_table_size
== 0) /* Protect against repetition. */
2837 filename_language_table
= XNEWVEC (filename_language
, fl_table_size
);
2839 add_filename_language (".c", language_c
);
2840 add_filename_language (".d", language_d
);
2841 add_filename_language (".C", language_cplus
);
2842 add_filename_language (".cc", language_cplus
);
2843 add_filename_language (".cp", language_cplus
);
2844 add_filename_language (".cpp", language_cplus
);
2845 add_filename_language (".cxx", language_cplus
);
2846 add_filename_language (".c++", language_cplus
);
2847 add_filename_language (".java", language_java
);
2848 add_filename_language (".class", language_java
);
2849 add_filename_language (".m", language_objc
);
2850 add_filename_language (".f", language_fortran
);
2851 add_filename_language (".F", language_fortran
);
2852 add_filename_language (".for", language_fortran
);
2853 add_filename_language (".FOR", language_fortran
);
2854 add_filename_language (".ftn", language_fortran
);
2855 add_filename_language (".FTN", language_fortran
);
2856 add_filename_language (".fpp", language_fortran
);
2857 add_filename_language (".FPP", language_fortran
);
2858 add_filename_language (".f90", language_fortran
);
2859 add_filename_language (".F90", language_fortran
);
2860 add_filename_language (".f95", language_fortran
);
2861 add_filename_language (".F95", language_fortran
);
2862 add_filename_language (".f03", language_fortran
);
2863 add_filename_language (".F03", language_fortran
);
2864 add_filename_language (".f08", language_fortran
);
2865 add_filename_language (".F08", language_fortran
);
2866 add_filename_language (".s", language_asm
);
2867 add_filename_language (".sx", language_asm
);
2868 add_filename_language (".S", language_asm
);
2869 add_filename_language (".pas", language_pascal
);
2870 add_filename_language (".p", language_pascal
);
2871 add_filename_language (".pp", language_pascal
);
2872 add_filename_language (".adb", language_ada
);
2873 add_filename_language (".ads", language_ada
);
2874 add_filename_language (".a", language_ada
);
2875 add_filename_language (".ada", language_ada
);
2876 add_filename_language (".dg", language_ada
);
2881 deduce_language_from_filename (const char *filename
)
2886 if (filename
!= NULL
)
2887 if ((cp
= strrchr (filename
, '.')) != NULL
)
2888 for (i
= 0; i
< fl_table_next
; i
++)
2889 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2890 return filename_language_table
[i
].lang
;
2892 return language_unknown
;
2895 /* Allocate and initialize a new symbol table.
2896 CUST is from the result of allocate_compunit_symtab. */
2899 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2901 struct objfile
*objfile
= cust
->objfile
;
2902 struct symtab
*symtab
2903 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2906 = (const char *) bcache (filename
, strlen (filename
) + 1,
2907 objfile
->per_bfd
->filename_cache
);
2908 symtab
->fullname
= NULL
;
2909 symtab
->language
= deduce_language_from_filename (filename
);
2911 /* This can be very verbose with lots of headers.
2912 Only print at higher debug levels. */
2913 if (symtab_create_debug
>= 2)
2915 /* Be a bit clever with debugging messages, and don't print objfile
2916 every time, only when it changes. */
2917 static char *last_objfile_name
= NULL
;
2919 if (last_objfile_name
== NULL
2920 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2922 xfree (last_objfile_name
);
2923 last_objfile_name
= xstrdup (objfile_name (objfile
));
2924 fprintf_unfiltered (gdb_stdlog
,
2925 "Creating one or more symtabs for objfile %s ...\n",
2928 fprintf_unfiltered (gdb_stdlog
,
2929 "Created symtab %s for module %s.\n",
2930 host_address_to_string (symtab
), filename
);
2933 /* Add it to CUST's list of symtabs. */
2934 if (cust
->filetabs
== NULL
)
2936 cust
->filetabs
= symtab
;
2937 cust
->last_filetab
= symtab
;
2941 cust
->last_filetab
->next
= symtab
;
2942 cust
->last_filetab
= symtab
;
2945 /* Backlink to the containing compunit symtab. */
2946 symtab
->compunit_symtab
= cust
;
2951 /* Allocate and initialize a new compunit.
2952 NAME is the name of the main source file, if there is one, or some
2953 descriptive text if there are no source files. */
2955 struct compunit_symtab
*
2956 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2958 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2959 struct compunit_symtab
);
2960 const char *saved_name
;
2962 cu
->objfile
= objfile
;
2964 /* The name we record here is only for display/debugging purposes.
2965 Just save the basename to avoid path issues (too long for display,
2966 relative vs absolute, etc.). */
2967 saved_name
= lbasename (name
);
2969 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2970 strlen (saved_name
));
2972 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2974 if (symtab_create_debug
)
2976 fprintf_unfiltered (gdb_stdlog
,
2977 "Created compunit symtab %s for %s.\n",
2978 host_address_to_string (cu
),
2985 /* Hook CU to the objfile it comes from. */
2988 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2990 cu
->next
= cu
->objfile
->compunit_symtabs
;
2991 cu
->objfile
->compunit_symtabs
= cu
;
2995 /* Reset all data structures in gdb which may contain references to symbol
2996 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2999 clear_symtab_users (int add_flags
)
3001 /* Someday, we should do better than this, by only blowing away
3002 the things that really need to be blown. */
3004 /* Clear the "current" symtab first, because it is no longer valid.
3005 breakpoint_re_set may try to access the current symtab. */
3006 clear_current_source_symtab_and_line ();
3009 clear_last_displayed_sal ();
3010 clear_pc_function_cache ();
3011 observer_notify_new_objfile (NULL
);
3013 /* Clear globals which might have pointed into a removed objfile.
3014 FIXME: It's not clear which of these are supposed to persist
3015 between expressions and which ought to be reset each time. */
3016 expression_context_block
= NULL
;
3017 innermost_block
= NULL
;
3019 /* Varobj may refer to old symbols, perform a cleanup. */
3020 varobj_invalidate ();
3022 /* Now that the various caches have been cleared, we can re_set
3023 our breakpoints without risking it using stale data. */
3024 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
3025 breakpoint_re_set ();
3029 clear_symtab_users_cleanup (void *ignore
)
3031 clear_symtab_users (0);
3035 The following code implements an abstraction for debugging overlay sections.
3037 The target model is as follows:
3038 1) The gnu linker will permit multiple sections to be mapped into the
3039 same VMA, each with its own unique LMA (or load address).
3040 2) It is assumed that some runtime mechanism exists for mapping the
3041 sections, one by one, from the load address into the VMA address.
3042 3) This code provides a mechanism for gdb to keep track of which
3043 sections should be considered to be mapped from the VMA to the LMA.
3044 This information is used for symbol lookup, and memory read/write.
3045 For instance, if a section has been mapped then its contents
3046 should be read from the VMA, otherwise from the LMA.
3048 Two levels of debugger support for overlays are available. One is
3049 "manual", in which the debugger relies on the user to tell it which
3050 overlays are currently mapped. This level of support is
3051 implemented entirely in the core debugger, and the information about
3052 whether a section is mapped is kept in the objfile->obj_section table.
3054 The second level of support is "automatic", and is only available if
3055 the target-specific code provides functionality to read the target's
3056 overlay mapping table, and translate its contents for the debugger
3057 (by updating the mapped state information in the obj_section tables).
3059 The interface is as follows:
3061 overlay map <name> -- tell gdb to consider this section mapped
3062 overlay unmap <name> -- tell gdb to consider this section unmapped
3063 overlay list -- list the sections that GDB thinks are mapped
3064 overlay read-target -- get the target's state of what's mapped
3065 overlay off/manual/auto -- set overlay debugging state
3066 Functional interface:
3067 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3068 section, return that section.
3069 find_pc_overlay(pc): find any overlay section that contains
3070 the pc, either in its VMA or its LMA
3071 section_is_mapped(sect): true if overlay is marked as mapped
3072 section_is_overlay(sect): true if section's VMA != LMA
3073 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3074 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3075 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3076 overlay_mapped_address(...): map an address from section's LMA to VMA
3077 overlay_unmapped_address(...): map an address from section's VMA to LMA
3078 symbol_overlayed_address(...): Return a "current" address for symbol:
3079 either in VMA or LMA depending on whether
3080 the symbol's section is currently mapped. */
3082 /* Overlay debugging state: */
3084 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3085 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
3087 /* Function: section_is_overlay (SECTION)
3088 Returns true if SECTION has VMA not equal to LMA, ie.
3089 SECTION is loaded at an address different from where it will "run". */
3092 section_is_overlay (struct obj_section
*section
)
3094 if (overlay_debugging
&& section
)
3096 bfd
*abfd
= section
->objfile
->obfd
;
3097 asection
*bfd_section
= section
->the_bfd_section
;
3099 if (bfd_section_lma (abfd
, bfd_section
) != 0
3100 && bfd_section_lma (abfd
, bfd_section
)
3101 != bfd_section_vma (abfd
, bfd_section
))
3108 /* Function: overlay_invalidate_all (void)
3109 Invalidate the mapped state of all overlay sections (mark it as stale). */
3112 overlay_invalidate_all (void)
3114 struct objfile
*objfile
;
3115 struct obj_section
*sect
;
3117 ALL_OBJSECTIONS (objfile
, sect
)
3118 if (section_is_overlay (sect
))
3119 sect
->ovly_mapped
= -1;
3122 /* Function: section_is_mapped (SECTION)
3123 Returns true if section is an overlay, and is currently mapped.
3125 Access to the ovly_mapped flag is restricted to this function, so
3126 that we can do automatic update. If the global flag
3127 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3128 overlay_invalidate_all. If the mapped state of the particular
3129 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3132 section_is_mapped (struct obj_section
*osect
)
3134 struct gdbarch
*gdbarch
;
3136 if (osect
== 0 || !section_is_overlay (osect
))
3139 switch (overlay_debugging
)
3143 return 0; /* overlay debugging off */
3144 case ovly_auto
: /* overlay debugging automatic */
3145 /* Unles there is a gdbarch_overlay_update function,
3146 there's really nothing useful to do here (can't really go auto). */
3147 gdbarch
= get_objfile_arch (osect
->objfile
);
3148 if (gdbarch_overlay_update_p (gdbarch
))
3150 if (overlay_cache_invalid
)
3152 overlay_invalidate_all ();
3153 overlay_cache_invalid
= 0;
3155 if (osect
->ovly_mapped
== -1)
3156 gdbarch_overlay_update (gdbarch
, osect
);
3158 /* fall thru to manual case */
3159 case ovly_on
: /* overlay debugging manual */
3160 return osect
->ovly_mapped
== 1;
3164 /* Function: pc_in_unmapped_range
3165 If PC falls into the lma range of SECTION, return true, else false. */
3168 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3170 if (section_is_overlay (section
))
3172 bfd
*abfd
= section
->objfile
->obfd
;
3173 asection
*bfd_section
= section
->the_bfd_section
;
3175 /* We assume the LMA is relocated by the same offset as the VMA. */
3176 bfd_vma size
= bfd_get_section_size (bfd_section
);
3177 CORE_ADDR offset
= obj_section_offset (section
);
3179 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3180 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3187 /* Function: pc_in_mapped_range
3188 If PC falls into the vma range of SECTION, return true, else false. */
3191 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3193 if (section_is_overlay (section
))
3195 if (obj_section_addr (section
) <= pc
3196 && pc
< obj_section_endaddr (section
))
3203 /* Return true if the mapped ranges of sections A and B overlap, false
3207 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3209 CORE_ADDR a_start
= obj_section_addr (a
);
3210 CORE_ADDR a_end
= obj_section_endaddr (a
);
3211 CORE_ADDR b_start
= obj_section_addr (b
);
3212 CORE_ADDR b_end
= obj_section_endaddr (b
);
3214 return (a_start
< b_end
&& b_start
< a_end
);
3217 /* Function: overlay_unmapped_address (PC, SECTION)
3218 Returns the address corresponding to PC in the unmapped (load) range.
3219 May be the same as PC. */
3222 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3224 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3226 bfd
*abfd
= section
->objfile
->obfd
;
3227 asection
*bfd_section
= section
->the_bfd_section
;
3229 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3230 - bfd_section_vma (abfd
, bfd_section
);
3236 /* Function: overlay_mapped_address (PC, SECTION)
3237 Returns the address corresponding to PC in the mapped (runtime) range.
3238 May be the same as PC. */
3241 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3243 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3245 bfd
*abfd
= section
->objfile
->obfd
;
3246 asection
*bfd_section
= section
->the_bfd_section
;
3248 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3249 - bfd_section_lma (abfd
, bfd_section
);
3255 /* Function: symbol_overlayed_address
3256 Return one of two addresses (relative to the VMA or to the LMA),
3257 depending on whether the section is mapped or not. */
3260 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3262 if (overlay_debugging
)
3264 /* If the symbol has no section, just return its regular address. */
3267 /* If the symbol's section is not an overlay, just return its
3269 if (!section_is_overlay (section
))
3271 /* If the symbol's section is mapped, just return its address. */
3272 if (section_is_mapped (section
))
3275 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3276 * then return its LOADED address rather than its vma address!!
3278 return overlay_unmapped_address (address
, section
);
3283 /* Function: find_pc_overlay (PC)
3284 Return the best-match overlay section for PC:
3285 If PC matches a mapped overlay section's VMA, return that section.
3286 Else if PC matches an unmapped section's VMA, return that section.
3287 Else if PC matches an unmapped section's LMA, return that section. */
3289 struct obj_section
*
3290 find_pc_overlay (CORE_ADDR pc
)
3292 struct objfile
*objfile
;
3293 struct obj_section
*osect
, *best_match
= NULL
;
3295 if (overlay_debugging
)
3296 ALL_OBJSECTIONS (objfile
, osect
)
3297 if (section_is_overlay (osect
))
3299 if (pc_in_mapped_range (pc
, osect
))
3301 if (section_is_mapped (osect
))
3306 else if (pc_in_unmapped_range (pc
, osect
))
3312 /* Function: find_pc_mapped_section (PC)
3313 If PC falls into the VMA address range of an overlay section that is
3314 currently marked as MAPPED, return that section. Else return NULL. */
3316 struct obj_section
*
3317 find_pc_mapped_section (CORE_ADDR pc
)
3319 struct objfile
*objfile
;
3320 struct obj_section
*osect
;
3322 if (overlay_debugging
)
3323 ALL_OBJSECTIONS (objfile
, osect
)
3324 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3330 /* Function: list_overlays_command
3331 Print a list of mapped sections and their PC ranges. */
3334 list_overlays_command (char *args
, int from_tty
)
3337 struct objfile
*objfile
;
3338 struct obj_section
*osect
;
3340 if (overlay_debugging
)
3341 ALL_OBJSECTIONS (objfile
, osect
)
3342 if (section_is_mapped (osect
))
3344 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3349 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3350 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3351 size
= bfd_get_section_size (osect
->the_bfd_section
);
3352 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3354 printf_filtered ("Section %s, loaded at ", name
);
3355 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3356 puts_filtered (" - ");
3357 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3358 printf_filtered (", mapped at ");
3359 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3360 puts_filtered (" - ");
3361 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3362 puts_filtered ("\n");
3367 printf_filtered (_("No sections are mapped.\n"));
3370 /* Function: map_overlay_command
3371 Mark the named section as mapped (ie. residing at its VMA address). */
3374 map_overlay_command (char *args
, int from_tty
)
3376 struct objfile
*objfile
, *objfile2
;
3377 struct obj_section
*sec
, *sec2
;
3379 if (!overlay_debugging
)
3380 error (_("Overlay debugging not enabled. Use "
3381 "either the 'overlay auto' or\n"
3382 "the 'overlay manual' command."));
3384 if (args
== 0 || *args
== 0)
3385 error (_("Argument required: name of an overlay section"));
3387 /* First, find a section matching the user supplied argument. */
3388 ALL_OBJSECTIONS (objfile
, sec
)
3389 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3391 /* Now, check to see if the section is an overlay. */
3392 if (!section_is_overlay (sec
))
3393 continue; /* not an overlay section */
3395 /* Mark the overlay as "mapped". */
3396 sec
->ovly_mapped
= 1;
3398 /* Next, make a pass and unmap any sections that are
3399 overlapped by this new section: */
3400 ALL_OBJSECTIONS (objfile2
, sec2
)
3401 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3404 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3405 bfd_section_name (objfile
->obfd
,
3406 sec2
->the_bfd_section
));
3407 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3411 error (_("No overlay section called %s"), args
);
3414 /* Function: unmap_overlay_command
3415 Mark the overlay section as unmapped
3416 (ie. resident in its LMA address range, rather than the VMA range). */
3419 unmap_overlay_command (char *args
, int from_tty
)
3421 struct objfile
*objfile
;
3422 struct obj_section
*sec
= NULL
;
3424 if (!overlay_debugging
)
3425 error (_("Overlay debugging not enabled. "
3426 "Use either the 'overlay auto' or\n"
3427 "the 'overlay manual' command."));
3429 if (args
== 0 || *args
== 0)
3430 error (_("Argument required: name of an overlay section"));
3432 /* First, find a section matching the user supplied argument. */
3433 ALL_OBJSECTIONS (objfile
, sec
)
3434 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3436 if (!sec
->ovly_mapped
)
3437 error (_("Section %s is not mapped"), args
);
3438 sec
->ovly_mapped
= 0;
3441 error (_("No overlay section called %s"), args
);
3444 /* Function: overlay_auto_command
3445 A utility command to turn on overlay debugging.
3446 Possibly this should be done via a set/show command. */
3449 overlay_auto_command (char *args
, int from_tty
)
3451 overlay_debugging
= ovly_auto
;
3452 enable_overlay_breakpoints ();
3454 printf_unfiltered (_("Automatic overlay debugging enabled."));
3457 /* Function: overlay_manual_command
3458 A utility command to turn on overlay debugging.
3459 Possibly this should be done via a set/show command. */
3462 overlay_manual_command (char *args
, int from_tty
)
3464 overlay_debugging
= ovly_on
;
3465 disable_overlay_breakpoints ();
3467 printf_unfiltered (_("Overlay debugging enabled."));
3470 /* Function: overlay_off_command
3471 A utility command to turn on overlay debugging.
3472 Possibly this should be done via a set/show command. */
3475 overlay_off_command (char *args
, int from_tty
)
3477 overlay_debugging
= ovly_off
;
3478 disable_overlay_breakpoints ();
3480 printf_unfiltered (_("Overlay debugging disabled."));
3484 overlay_load_command (char *args
, int from_tty
)
3486 struct gdbarch
*gdbarch
= get_current_arch ();
3488 if (gdbarch_overlay_update_p (gdbarch
))
3489 gdbarch_overlay_update (gdbarch
, NULL
);
3491 error (_("This target does not know how to read its overlay state."));
3494 /* Function: overlay_command
3495 A place-holder for a mis-typed command. */
3497 /* Command list chain containing all defined "overlay" subcommands. */
3498 static struct cmd_list_element
*overlaylist
;
3501 overlay_command (char *args
, int from_tty
)
3504 ("\"overlay\" must be followed by the name of an overlay command.\n");
3505 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3508 /* Target Overlays for the "Simplest" overlay manager:
3510 This is GDB's default target overlay layer. It works with the
3511 minimal overlay manager supplied as an example by Cygnus. The
3512 entry point is via a function pointer "gdbarch_overlay_update",
3513 so targets that use a different runtime overlay manager can
3514 substitute their own overlay_update function and take over the
3517 The overlay_update function pokes around in the target's data structures
3518 to see what overlays are mapped, and updates GDB's overlay mapping with
3521 In this simple implementation, the target data structures are as follows:
3522 unsigned _novlys; /# number of overlay sections #/
3523 unsigned _ovly_table[_novlys][4] = {
3524 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3525 {..., ..., ..., ...},
3527 unsigned _novly_regions; /# number of overlay regions #/
3528 unsigned _ovly_region_table[_novly_regions][3] = {
3529 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3532 These functions will attempt to update GDB's mappedness state in the
3533 symbol section table, based on the target's mappedness state.
3535 To do this, we keep a cached copy of the target's _ovly_table, and
3536 attempt to detect when the cached copy is invalidated. The main
3537 entry point is "simple_overlay_update(SECT), which looks up SECT in
3538 the cached table and re-reads only the entry for that section from
3539 the target (whenever possible). */
3541 /* Cached, dynamically allocated copies of the target data structures: */
3542 static unsigned (*cache_ovly_table
)[4] = 0;
3543 static unsigned cache_novlys
= 0;
3544 static CORE_ADDR cache_ovly_table_base
= 0;
3547 VMA
, OSIZE
, LMA
, MAPPED
3550 /* Throw away the cached copy of _ovly_table. */
3553 simple_free_overlay_table (void)
3555 if (cache_ovly_table
)
3556 xfree (cache_ovly_table
);
3558 cache_ovly_table
= NULL
;
3559 cache_ovly_table_base
= 0;
3562 /* Read an array of ints of size SIZE from the target into a local buffer.
3563 Convert to host order. int LEN is number of ints. */
3566 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3567 int len
, int size
, enum bfd_endian byte_order
)
3569 /* FIXME (alloca): Not safe if array is very large. */
3570 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3573 read_memory (memaddr
, buf
, len
* size
);
3574 for (i
= 0; i
< len
; i
++)
3575 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3578 /* Find and grab a copy of the target _ovly_table
3579 (and _novlys, which is needed for the table's size). */
3582 simple_read_overlay_table (void)
3584 struct bound_minimal_symbol novlys_msym
;
3585 struct bound_minimal_symbol ovly_table_msym
;
3586 struct gdbarch
*gdbarch
;
3588 enum bfd_endian byte_order
;
3590 simple_free_overlay_table ();
3591 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3592 if (! novlys_msym
.minsym
)
3594 error (_("Error reading inferior's overlay table: "
3595 "couldn't find `_novlys' variable\n"
3596 "in inferior. Use `overlay manual' mode."));
3600 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3601 if (! ovly_table_msym
.minsym
)
3603 error (_("Error reading inferior's overlay table: couldn't find "
3604 "`_ovly_table' array\n"
3605 "in inferior. Use `overlay manual' mode."));
3609 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3610 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3611 byte_order
= gdbarch_byte_order (gdbarch
);
3613 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3616 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3617 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3618 read_target_long_array (cache_ovly_table_base
,
3619 (unsigned int *) cache_ovly_table
,
3620 cache_novlys
* 4, word_size
, byte_order
);
3622 return 1; /* SUCCESS */
3625 /* Function: simple_overlay_update_1
3626 A helper function for simple_overlay_update. Assuming a cached copy
3627 of _ovly_table exists, look through it to find an entry whose vma,
3628 lma and size match those of OSECT. Re-read the entry and make sure
3629 it still matches OSECT (else the table may no longer be valid).
3630 Set OSECT's mapped state to match the entry. Return: 1 for
3631 success, 0 for failure. */
3634 simple_overlay_update_1 (struct obj_section
*osect
)
3637 bfd
*obfd
= osect
->objfile
->obfd
;
3638 asection
*bsect
= osect
->the_bfd_section
;
3639 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3640 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3641 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3643 size
= bfd_get_section_size (osect
->the_bfd_section
);
3644 for (i
= 0; i
< cache_novlys
; i
++)
3645 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3646 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3647 /* && cache_ovly_table[i][OSIZE] == size */ )
3649 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3650 (unsigned int *) cache_ovly_table
[i
],
3651 4, word_size
, byte_order
);
3652 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3653 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3654 /* && cache_ovly_table[i][OSIZE] == size */ )
3656 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3659 else /* Warning! Warning! Target's ovly table has changed! */
3665 /* Function: simple_overlay_update
3666 If OSECT is NULL, then update all sections' mapped state
3667 (after re-reading the entire target _ovly_table).
3668 If OSECT is non-NULL, then try to find a matching entry in the
3669 cached ovly_table and update only OSECT's mapped state.
3670 If a cached entry can't be found or the cache isn't valid, then
3671 re-read the entire cache, and go ahead and update all sections. */
3674 simple_overlay_update (struct obj_section
*osect
)
3676 struct objfile
*objfile
;
3678 /* Were we given an osect to look up? NULL means do all of them. */
3680 /* Have we got a cached copy of the target's overlay table? */
3681 if (cache_ovly_table
!= NULL
)
3683 /* Does its cached location match what's currently in the
3685 struct bound_minimal_symbol minsym
3686 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3688 if (minsym
.minsym
== NULL
)
3689 error (_("Error reading inferior's overlay table: couldn't "
3690 "find `_ovly_table' array\n"
3691 "in inferior. Use `overlay manual' mode."));
3693 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3694 /* Then go ahead and try to look up this single section in
3696 if (simple_overlay_update_1 (osect
))
3697 /* Found it! We're done. */
3701 /* Cached table no good: need to read the entire table anew.
3702 Or else we want all the sections, in which case it's actually
3703 more efficient to read the whole table in one block anyway. */
3705 if (! simple_read_overlay_table ())
3708 /* Now may as well update all sections, even if only one was requested. */
3709 ALL_OBJSECTIONS (objfile
, osect
)
3710 if (section_is_overlay (osect
))
3713 bfd
*obfd
= osect
->objfile
->obfd
;
3714 asection
*bsect
= osect
->the_bfd_section
;
3716 size
= bfd_get_section_size (bsect
);
3717 for (i
= 0; i
< cache_novlys
; i
++)
3718 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3719 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3720 /* && cache_ovly_table[i][OSIZE] == size */ )
3721 { /* obj_section matches i'th entry in ovly_table. */
3722 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3723 break; /* finished with inner for loop: break out. */
3728 /* Set the output sections and output offsets for section SECTP in
3729 ABFD. The relocation code in BFD will read these offsets, so we
3730 need to be sure they're initialized. We map each section to itself,
3731 with no offset; this means that SECTP->vma will be honored. */
3734 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3736 sectp
->output_section
= sectp
;
3737 sectp
->output_offset
= 0;
3740 /* Default implementation for sym_relocate. */
3743 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3746 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3748 bfd
*abfd
= sectp
->owner
;
3750 /* We're only interested in sections with relocation
3752 if ((sectp
->flags
& SEC_RELOC
) == 0)
3755 /* We will handle section offsets properly elsewhere, so relocate as if
3756 all sections begin at 0. */
3757 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3759 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3762 /* Relocate the contents of a debug section SECTP in ABFD. The
3763 contents are stored in BUF if it is non-NULL, or returned in a
3764 malloc'd buffer otherwise.
3766 For some platforms and debug info formats, shared libraries contain
3767 relocations against the debug sections (particularly for DWARF-2;
3768 one affected platform is PowerPC GNU/Linux, although it depends on
3769 the version of the linker in use). Also, ELF object files naturally
3770 have unresolved relocations for their debug sections. We need to apply
3771 the relocations in order to get the locations of symbols correct.
3772 Another example that may require relocation processing, is the
3773 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3777 symfile_relocate_debug_section (struct objfile
*objfile
,
3778 asection
*sectp
, bfd_byte
*buf
)
3780 gdb_assert (objfile
->sf
->sym_relocate
);
3782 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3785 struct symfile_segment_data
*
3786 get_symfile_segment_data (bfd
*abfd
)
3788 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3793 return sf
->sym_segments (abfd
);
3797 free_symfile_segment_data (struct symfile_segment_data
*data
)
3799 xfree (data
->segment_bases
);
3800 xfree (data
->segment_sizes
);
3801 xfree (data
->segment_info
);
3806 - DATA, containing segment addresses from the object file ABFD, and
3807 the mapping from ABFD's sections onto the segments that own them,
3809 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3810 segment addresses reported by the target,
3811 store the appropriate offsets for each section in OFFSETS.
3813 If there are fewer entries in SEGMENT_BASES than there are segments
3814 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3816 If there are more entries, then ignore the extra. The target may
3817 not be able to distinguish between an empty data segment and a
3818 missing data segment; a missing text segment is less plausible. */
3821 symfile_map_offsets_to_segments (bfd
*abfd
,
3822 const struct symfile_segment_data
*data
,
3823 struct section_offsets
*offsets
,
3824 int num_segment_bases
,
3825 const CORE_ADDR
*segment_bases
)
3830 /* It doesn't make sense to call this function unless you have some
3831 segment base addresses. */
3832 gdb_assert (num_segment_bases
> 0);
3834 /* If we do not have segment mappings for the object file, we
3835 can not relocate it by segments. */
3836 gdb_assert (data
!= NULL
);
3837 gdb_assert (data
->num_segments
> 0);
3839 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3841 int which
= data
->segment_info
[i
];
3843 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3845 /* Don't bother computing offsets for sections that aren't
3846 loaded as part of any segment. */
3850 /* Use the last SEGMENT_BASES entry as the address of any extra
3851 segments mentioned in DATA->segment_info. */
3852 if (which
> num_segment_bases
)
3853 which
= num_segment_bases
;
3855 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3856 - data
->segment_bases
[which
- 1]);
3863 symfile_find_segment_sections (struct objfile
*objfile
)
3865 bfd
*abfd
= objfile
->obfd
;
3868 struct symfile_segment_data
*data
;
3870 data
= get_symfile_segment_data (objfile
->obfd
);
3874 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3876 free_symfile_segment_data (data
);
3880 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3882 int which
= data
->segment_info
[i
];
3886 if (objfile
->sect_index_text
== -1)
3887 objfile
->sect_index_text
= sect
->index
;
3889 if (objfile
->sect_index_rodata
== -1)
3890 objfile
->sect_index_rodata
= sect
->index
;
3892 else if (which
== 2)
3894 if (objfile
->sect_index_data
== -1)
3895 objfile
->sect_index_data
= sect
->index
;
3897 if (objfile
->sect_index_bss
== -1)
3898 objfile
->sect_index_bss
= sect
->index
;
3902 free_symfile_segment_data (data
);
3905 /* Listen for free_objfile events. */
3908 symfile_free_objfile (struct objfile
*objfile
)
3910 /* Remove the target sections owned by this objfile. */
3911 if (objfile
!= NULL
)
3912 remove_target_sections ((void *) objfile
);
3915 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3916 Expand all symtabs that match the specified criteria.
3917 See quick_symbol_functions.expand_symtabs_matching for details. */
3920 expand_symtabs_matching (expand_symtabs_file_matcher_ftype
*file_matcher
,
3921 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3922 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3923 enum search_domain kind
,
3926 struct objfile
*objfile
;
3928 ALL_OBJFILES (objfile
)
3931 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3933 expansion_notify
, kind
,
3938 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3939 Map function FUN over every file.
3940 See quick_symbol_functions.map_symbol_filenames for details. */
3943 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3946 struct objfile
*objfile
;
3948 ALL_OBJFILES (objfile
)
3951 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3957 _initialize_symfile (void)
3959 struct cmd_list_element
*c
;
3961 observer_attach_free_objfile (symfile_free_objfile
);
3963 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3964 Load symbol table from executable file FILE.\n\
3965 The `file' command can also load symbol tables, as well as setting the file\n\
3966 to execute."), &cmdlist
);
3967 set_cmd_completer (c
, filename_completer
);
3969 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3970 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3971 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3972 ...]\nADDR is the starting address of the file's text.\n\
3973 The optional arguments are section-name section-address pairs and\n\
3974 should be specified if the data and bss segments are not contiguous\n\
3975 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3977 set_cmd_completer (c
, filename_completer
);
3979 c
= add_cmd ("remove-symbol-file", class_files
,
3980 remove_symbol_file_command
, _("\
3981 Remove a symbol file added via the add-symbol-file command.\n\
3982 Usage: remove-symbol-file FILENAME\n\
3983 remove-symbol-file -a ADDRESS\n\
3984 The file to remove can be identified by its filename or by an address\n\
3985 that lies within the boundaries of this symbol file in memory."),
3988 c
= add_cmd ("load", class_files
, load_command
, _("\
3989 Dynamically load FILE into the running program, and record its symbols\n\
3990 for access from GDB.\n\
3991 A load OFFSET may also be given."), &cmdlist
);
3992 set_cmd_completer (c
, filename_completer
);
3994 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3995 _("Commands for debugging overlays."), &overlaylist
,
3996 "overlay ", 0, &cmdlist
);
3998 add_com_alias ("ovly", "overlay", class_alias
, 1);
3999 add_com_alias ("ov", "overlay", class_alias
, 1);
4001 add_cmd ("map-overlay", class_support
, map_overlay_command
,
4002 _("Assert that an overlay section is mapped."), &overlaylist
);
4004 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
4005 _("Assert that an overlay section is unmapped."), &overlaylist
);
4007 add_cmd ("list-overlays", class_support
, list_overlays_command
,
4008 _("List mappings of overlay sections."), &overlaylist
);
4010 add_cmd ("manual", class_support
, overlay_manual_command
,
4011 _("Enable overlay debugging."), &overlaylist
);
4012 add_cmd ("off", class_support
, overlay_off_command
,
4013 _("Disable overlay debugging."), &overlaylist
);
4014 add_cmd ("auto", class_support
, overlay_auto_command
,
4015 _("Enable automatic overlay debugging."), &overlaylist
);
4016 add_cmd ("load-target", class_support
, overlay_load_command
,
4017 _("Read the overlay mapping state from the target."), &overlaylist
);
4019 /* Filename extension to source language lookup table: */
4020 init_filename_language_table ();
4021 add_setshow_string_noescape_cmd ("extension-language", class_files
,
4023 Set mapping between filename extension and source language."), _("\
4024 Show mapping between filename extension and source language."), _("\
4025 Usage: set extension-language .foo bar"),
4026 set_ext_lang_command
,
4028 &setlist
, &showlist
);
4030 add_info ("extensions", info_ext_lang_command
,
4031 _("All filename extensions associated with a source language."));
4033 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
4034 &debug_file_directory
, _("\
4035 Set the directories where separate debug symbols are searched for."), _("\
4036 Show the directories where separate debug symbols are searched for."), _("\
4037 Separate debug symbols are first searched for in the same\n\
4038 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
4039 and lastly at the path of the directory of the binary with\n\
4040 each global debug-file-directory component prepended."),
4042 show_debug_file_directory
,
4043 &setlist
, &showlist
);
4045 add_setshow_enum_cmd ("symbol-loading", no_class
,
4046 print_symbol_loading_enums
, &print_symbol_loading
,
4048 Set printing of symbol loading messages."), _("\
4049 Show printing of symbol loading messages."), _("\
4050 off == turn all messages off\n\
4051 brief == print messages for the executable,\n\
4052 and brief messages for shared libraries\n\
4053 full == print messages for the executable,\n\
4054 and messages for each shared library."),
4057 &setprintlist
, &showprintlist
);