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>
68 int (*deprecated_ui_load_progress_hook
) (const char *section
,
70 void (*deprecated_show_load_progress
) (const char *section
,
71 unsigned long section_sent
,
72 unsigned long section_size
,
73 unsigned long total_sent
,
74 unsigned long total_size
);
75 void (*deprecated_pre_add_symbol_hook
) (const char *);
76 void (*deprecated_post_add_symbol_hook
) (void);
78 static void clear_symtab_users_cleanup (void *ignore
);
80 /* Global variables owned by this file. */
81 int readnow_symbol_files
; /* Read full symbols immediately. */
83 /* Functions this file defines. */
85 static void load_command (char *, int);
87 static void symbol_file_add_main_1 (const char *args
, symfile_add_flags add_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 info_ext_lang_command (char *args
, int from_tty
);
119 static void symfile_find_segment_sections (struct objfile
*objfile
);
121 void _initialize_symfile (void);
123 /* List of all available sym_fns. On gdb startup, each object file reader
124 calls add_symtab_fns() to register information on each format it is
129 /* BFD flavour that we handle. */
130 enum bfd_flavour sym_flavour
;
132 /* The "vtable" of symbol functions. */
133 const struct sym_fns
*sym_fns
;
134 } registered_sym_fns
;
136 DEF_VEC_O (registered_sym_fns
);
138 static VEC (registered_sym_fns
) *symtab_fns
= NULL
;
140 /* Values for "set print symbol-loading". */
142 const char print_symbol_loading_off
[] = "off";
143 const char print_symbol_loading_brief
[] = "brief";
144 const char print_symbol_loading_full
[] = "full";
145 static const char *print_symbol_loading_enums
[] =
147 print_symbol_loading_off
,
148 print_symbol_loading_brief
,
149 print_symbol_loading_full
,
152 static const char *print_symbol_loading
= print_symbol_loading_full
;
154 /* If non-zero, shared library symbols will be added automatically
155 when the inferior is created, new libraries are loaded, or when
156 attaching to the inferior. This is almost always what users will
157 want to have happen; but for very large programs, the startup time
158 will be excessive, and so if this is a problem, the user can clear
159 this flag and then add the shared library symbols as needed. Note
160 that there is a potential for confusion, since if the shared
161 library symbols are not loaded, commands like "info fun" will *not*
162 report all the functions that are actually present. */
164 int auto_solib_add
= 1;
167 /* Return non-zero if symbol-loading messages should be printed.
168 FROM_TTY is the standard from_tty argument to gdb commands.
169 If EXEC is non-zero the messages are for the executable.
170 Otherwise, messages are for shared libraries.
171 If FULL is non-zero then the caller is printing a detailed message.
172 E.g., the message includes the shared library name.
173 Otherwise, the caller is printing a brief "summary" message. */
176 print_symbol_loading_p (int from_tty
, int exec
, int full
)
178 if (!from_tty
&& !info_verbose
)
183 /* We don't check FULL for executables, there are few such
184 messages, therefore brief == full. */
185 return print_symbol_loading
!= print_symbol_loading_off
;
188 return print_symbol_loading
== print_symbol_loading_full
;
189 return print_symbol_loading
== print_symbol_loading_brief
;
192 /* True if we are reading a symbol table. */
194 int currently_reading_symtab
= 0;
197 decrement_reading_symtab (void *dummy
)
199 currently_reading_symtab
--;
200 gdb_assert (currently_reading_symtab
>= 0);
203 /* Increment currently_reading_symtab and return a cleanup that can be
204 used to decrement it. */
207 increment_reading_symtab (void)
209 ++currently_reading_symtab
;
210 gdb_assert (currently_reading_symtab
> 0);
211 return make_cleanup (decrement_reading_symtab
, NULL
);
214 /* Remember the lowest-addressed loadable section we've seen.
215 This function is called via bfd_map_over_sections.
217 In case of equal vmas, the section with the largest size becomes the
218 lowest-addressed loadable section.
220 If the vmas and sizes are equal, the last section is considered the
221 lowest-addressed loadable section. */
224 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
226 asection
**lowest
= (asection
**) obj
;
228 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
231 *lowest
= sect
; /* First loadable section */
232 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
233 *lowest
= sect
; /* A lower loadable section */
234 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
235 && (bfd_section_size (abfd
, (*lowest
))
236 <= bfd_section_size (abfd
, sect
)))
240 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
241 new object's 'num_sections' field is set to 0; it must be updated
244 struct section_addr_info
*
245 alloc_section_addr_info (size_t num_sections
)
247 struct section_addr_info
*sap
;
250 size
= (sizeof (struct section_addr_info
)
251 + sizeof (struct other_sections
) * (num_sections
- 1));
252 sap
= (struct section_addr_info
*) xmalloc (size
);
253 memset (sap
, 0, size
);
258 /* Build (allocate and populate) a section_addr_info struct from
259 an existing section table. */
261 extern struct section_addr_info
*
262 build_section_addr_info_from_section_table (const struct target_section
*start
,
263 const struct target_section
*end
)
265 struct section_addr_info
*sap
;
266 const struct target_section
*stp
;
269 sap
= alloc_section_addr_info (end
- start
);
271 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
273 struct bfd_section
*asect
= stp
->the_bfd_section
;
274 bfd
*abfd
= asect
->owner
;
276 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
277 && oidx
< end
- start
)
279 sap
->other
[oidx
].addr
= stp
->addr
;
280 sap
->other
[oidx
].name
= xstrdup (bfd_section_name (abfd
, asect
));
281 sap
->other
[oidx
].sectindex
= gdb_bfd_section_index (abfd
, asect
);
286 sap
->num_sections
= oidx
;
291 /* Create a section_addr_info from section offsets in ABFD. */
293 static struct section_addr_info
*
294 build_section_addr_info_from_bfd (bfd
*abfd
)
296 struct section_addr_info
*sap
;
298 struct bfd_section
*sec
;
300 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
301 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
302 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
304 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
305 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
306 sap
->other
[i
].sectindex
= gdb_bfd_section_index (abfd
, sec
);
310 sap
->num_sections
= i
;
315 /* Create a section_addr_info from section offsets in OBJFILE. */
317 struct section_addr_info
*
318 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
320 struct section_addr_info
*sap
;
323 /* Before reread_symbols gets rewritten it is not safe to call:
324 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
326 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
327 for (i
= 0; i
< sap
->num_sections
; i
++)
329 int sectindex
= sap
->other
[i
].sectindex
;
331 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
336 /* Free all memory allocated by build_section_addr_info_from_section_table. */
339 free_section_addr_info (struct section_addr_info
*sap
)
343 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
344 xfree (sap
->other
[idx
].name
);
348 /* Initialize OBJFILE's sect_index_* members. */
351 init_objfile_sect_indices (struct objfile
*objfile
)
356 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
358 objfile
->sect_index_text
= sect
->index
;
360 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
362 objfile
->sect_index_data
= sect
->index
;
364 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
366 objfile
->sect_index_bss
= sect
->index
;
368 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
370 objfile
->sect_index_rodata
= sect
->index
;
372 /* This is where things get really weird... We MUST have valid
373 indices for the various sect_index_* members or gdb will abort.
374 So if for example, there is no ".text" section, we have to
375 accomodate that. First, check for a file with the standard
376 one or two segments. */
378 symfile_find_segment_sections (objfile
);
380 /* Except when explicitly adding symbol files at some address,
381 section_offsets contains nothing but zeros, so it doesn't matter
382 which slot in section_offsets the individual sect_index_* members
383 index into. So if they are all zero, it is safe to just point
384 all the currently uninitialized indices to the first slot. But
385 beware: if this is the main executable, it may be relocated
386 later, e.g. by the remote qOffsets packet, and then this will
387 be wrong! That's why we try segments first. */
389 for (i
= 0; i
< objfile
->num_sections
; i
++)
391 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
396 if (i
== objfile
->num_sections
)
398 if (objfile
->sect_index_text
== -1)
399 objfile
->sect_index_text
= 0;
400 if (objfile
->sect_index_data
== -1)
401 objfile
->sect_index_data
= 0;
402 if (objfile
->sect_index_bss
== -1)
403 objfile
->sect_index_bss
= 0;
404 if (objfile
->sect_index_rodata
== -1)
405 objfile
->sect_index_rodata
= 0;
409 /* The arguments to place_section. */
411 struct place_section_arg
413 struct section_offsets
*offsets
;
417 /* Find a unique offset to use for loadable section SECT if
418 the user did not provide an offset. */
421 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
423 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
424 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
426 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
428 /* We are only interested in allocated sections. */
429 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
432 /* If the user specified an offset, honor it. */
433 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
436 /* Otherwise, let's try to find a place for the section. */
437 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
444 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
446 int indx
= cur_sec
->index
;
448 /* We don't need to compare against ourself. */
452 /* We can only conflict with allocated sections. */
453 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
456 /* If the section offset is 0, either the section has not been placed
457 yet, or it was the lowest section placed (in which case LOWEST
458 will be past its end). */
459 if (offsets
[indx
] == 0)
462 /* If this section would overlap us, then we must move up. */
463 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
464 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
466 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
467 start_addr
= (start_addr
+ align
- 1) & -align
;
472 /* Otherwise, we appear to be OK. So far. */
477 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
478 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
481 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
482 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
486 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
488 const struct section_addr_info
*addrs
)
492 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
494 /* Now calculate offsets for section that were specified by the caller. */
495 for (i
= 0; i
< addrs
->num_sections
; i
++)
497 const struct other_sections
*osp
;
499 osp
= &addrs
->other
[i
];
500 if (osp
->sectindex
== -1)
503 /* Record all sections in offsets. */
504 /* The section_offsets in the objfile are here filled in using
506 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
510 /* Transform section name S for a name comparison. prelink can split section
511 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
512 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
513 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
514 (`.sbss') section has invalid (increased) virtual address. */
517 addr_section_name (const char *s
)
519 if (strcmp (s
, ".dynbss") == 0)
521 if (strcmp (s
, ".sdynbss") == 0)
527 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
528 their (name, sectindex) pair. sectindex makes the sort by name stable. */
531 addrs_section_compar (const void *ap
, const void *bp
)
533 const struct other_sections
*a
= *((struct other_sections
**) ap
);
534 const struct other_sections
*b
= *((struct other_sections
**) bp
);
537 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
541 return a
->sectindex
- b
->sectindex
;
544 /* Provide sorted array of pointers to sections of ADDRS. The array is
545 terminated by NULL. Caller is responsible to call xfree for it. */
547 static struct other_sections
**
548 addrs_section_sort (struct section_addr_info
*addrs
)
550 struct other_sections
**array
;
553 /* `+ 1' for the NULL terminator. */
554 array
= XNEWVEC (struct other_sections
*, addrs
->num_sections
+ 1);
555 for (i
= 0; i
< addrs
->num_sections
; i
++)
556 array
[i
] = &addrs
->other
[i
];
559 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
564 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
565 also SECTINDEXes specific to ABFD there. This function can be used to
566 rebase ADDRS to start referencing different BFD than before. */
569 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
571 asection
*lower_sect
;
572 CORE_ADDR lower_offset
;
574 struct cleanup
*my_cleanup
;
575 struct section_addr_info
*abfd_addrs
;
576 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
577 struct other_sections
**addrs_to_abfd_addrs
;
579 /* Find lowest loadable section to be used as starting point for
580 continguous sections. */
582 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
583 if (lower_sect
== NULL
)
585 warning (_("no loadable sections found in added symbol-file %s"),
586 bfd_get_filename (abfd
));
590 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
592 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
593 in ABFD. Section names are not unique - there can be multiple sections of
594 the same name. Also the sections of the same name do not have to be
595 adjacent to each other. Some sections may be present only in one of the
596 files. Even sections present in both files do not have to be in the same
599 Use stable sort by name for the sections in both files. Then linearly
600 scan both lists matching as most of the entries as possible. */
602 addrs_sorted
= addrs_section_sort (addrs
);
603 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
605 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
606 make_cleanup_free_section_addr_info (abfd_addrs
);
607 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
608 make_cleanup (xfree
, abfd_addrs_sorted
);
610 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
611 ABFD_ADDRS_SORTED. */
613 addrs_to_abfd_addrs
= XCNEWVEC (struct other_sections
*, addrs
->num_sections
);
614 make_cleanup (xfree
, addrs_to_abfd_addrs
);
616 while (*addrs_sorted
)
618 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
620 while (*abfd_addrs_sorted
621 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
625 if (*abfd_addrs_sorted
626 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
631 /* Make the found item directly addressable from ADDRS. */
632 index_in_addrs
= *addrs_sorted
- addrs
->other
;
633 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
634 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
636 /* Never use the same ABFD entry twice. */
643 /* Calculate offsets for the loadable sections.
644 FIXME! Sections must be in order of increasing loadable section
645 so that contiguous sections can use the lower-offset!!!
647 Adjust offsets if the segments are not contiguous.
648 If the section is contiguous, its offset should be set to
649 the offset of the highest loadable section lower than it
650 (the loadable section directly below it in memory).
651 this_offset = lower_offset = lower_addr - lower_orig_addr */
653 for (i
= 0; i
< addrs
->num_sections
; i
++)
655 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
659 /* This is the index used by BFD. */
660 addrs
->other
[i
].sectindex
= sect
->sectindex
;
662 if (addrs
->other
[i
].addr
!= 0)
664 addrs
->other
[i
].addr
-= sect
->addr
;
665 lower_offset
= addrs
->other
[i
].addr
;
668 addrs
->other
[i
].addr
= lower_offset
;
672 /* addr_section_name transformation is not used for SECT_NAME. */
673 const char *sect_name
= addrs
->other
[i
].name
;
675 /* This section does not exist in ABFD, which is normally
676 unexpected and we want to issue a warning.
678 However, the ELF prelinker does create a few sections which are
679 marked in the main executable as loadable (they are loaded in
680 memory from the DYNAMIC segment) and yet are not present in
681 separate debug info files. This is fine, and should not cause
682 a warning. Shared libraries contain just the section
683 ".gnu.liblist" but it is not marked as loadable there. There is
684 no other way to identify them than by their name as the sections
685 created by prelink have no special flags.
687 For the sections `.bss' and `.sbss' see addr_section_name. */
689 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
690 || strcmp (sect_name
, ".gnu.conflict") == 0
691 || (strcmp (sect_name
, ".bss") == 0
693 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
694 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
695 || (strcmp (sect_name
, ".sbss") == 0
697 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
698 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
699 warning (_("section %s not found in %s"), sect_name
,
700 bfd_get_filename (abfd
));
702 addrs
->other
[i
].addr
= 0;
703 addrs
->other
[i
].sectindex
= -1;
707 do_cleanups (my_cleanup
);
710 /* Parse the user's idea of an offset for dynamic linking, into our idea
711 of how to represent it for fast symbol reading. This is the default
712 version of the sym_fns.sym_offsets function for symbol readers that
713 don't need to do anything special. It allocates a section_offsets table
714 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
717 default_symfile_offsets (struct objfile
*objfile
,
718 const struct section_addr_info
*addrs
)
720 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
721 objfile
->section_offsets
= (struct section_offsets
*)
722 obstack_alloc (&objfile
->objfile_obstack
,
723 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
724 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
725 objfile
->num_sections
, addrs
);
727 /* For relocatable files, all loadable sections will start at zero.
728 The zero is meaningless, so try to pick arbitrary addresses such
729 that no loadable sections overlap. This algorithm is quadratic,
730 but the number of sections in a single object file is generally
732 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
734 struct place_section_arg arg
;
735 bfd
*abfd
= objfile
->obfd
;
738 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
739 /* We do not expect this to happen; just skip this step if the
740 relocatable file has a section with an assigned VMA. */
741 if (bfd_section_vma (abfd
, cur_sec
) != 0)
746 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
748 /* Pick non-overlapping offsets for sections the user did not
750 arg
.offsets
= objfile
->section_offsets
;
752 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
754 /* Correctly filling in the section offsets is not quite
755 enough. Relocatable files have two properties that
756 (most) shared objects do not:
758 - Their debug information will contain relocations. Some
759 shared libraries do also, but many do not, so this can not
762 - If there are multiple code sections they will be loaded
763 at different relative addresses in memory than they are
764 in the objfile, since all sections in the file will start
767 Because GDB has very limited ability to map from an
768 address in debug info to the correct code section,
769 it relies on adding SECT_OFF_TEXT to things which might be
770 code. If we clear all the section offsets, and set the
771 section VMAs instead, then symfile_relocate_debug_section
772 will return meaningful debug information pointing at the
775 GDB has too many different data structures for section
776 addresses - a bfd, objfile, and so_list all have section
777 tables, as does exec_ops. Some of these could probably
780 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
781 cur_sec
= cur_sec
->next
)
783 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
786 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
787 exec_set_section_address (bfd_get_filename (abfd
),
789 offsets
[cur_sec
->index
]);
790 offsets
[cur_sec
->index
] = 0;
795 /* Remember the bfd indexes for the .text, .data, .bss and
797 init_objfile_sect_indices (objfile
);
800 /* Divide the file into segments, which are individual relocatable units.
801 This is the default version of the sym_fns.sym_segments function for
802 symbol readers that do not have an explicit representation of segments.
803 It assumes that object files do not have segments, and fully linked
804 files have a single segment. */
806 struct symfile_segment_data
*
807 default_symfile_segments (bfd
*abfd
)
811 struct symfile_segment_data
*data
;
814 /* Relocatable files contain enough information to position each
815 loadable section independently; they should not be relocated
817 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
820 /* Make sure there is at least one loadable section in the file. */
821 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
823 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
831 low
= bfd_get_section_vma (abfd
, sect
);
832 high
= low
+ bfd_get_section_size (sect
);
834 data
= XCNEW (struct symfile_segment_data
);
835 data
->num_segments
= 1;
836 data
->segment_bases
= XCNEW (CORE_ADDR
);
837 data
->segment_sizes
= XCNEW (CORE_ADDR
);
839 num_sections
= bfd_count_sections (abfd
);
840 data
->segment_info
= XCNEWVEC (int, num_sections
);
842 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
846 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
849 vma
= bfd_get_section_vma (abfd
, sect
);
852 if (vma
+ bfd_get_section_size (sect
) > high
)
853 high
= vma
+ bfd_get_section_size (sect
);
855 data
->segment_info
[i
] = 1;
858 data
->segment_bases
[0] = low
;
859 data
->segment_sizes
[0] = high
- low
;
864 /* This is a convenience function to call sym_read for OBJFILE and
865 possibly force the partial symbols to be read. */
868 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
870 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
871 objfile
->per_bfd
->minsyms_read
= 1;
873 /* find_separate_debug_file_in_section should be called only if there is
874 single binary with no existing separate debug info file. */
875 if (!objfile_has_partial_symbols (objfile
)
876 && objfile
->separate_debug_objfile
== NULL
877 && objfile
->separate_debug_objfile_backlink
== NULL
)
879 bfd
*abfd
= find_separate_debug_file_in_section (objfile
);
880 struct cleanup
*cleanup
= make_cleanup_bfd_unref (abfd
);
884 /* find_separate_debug_file_in_section uses the same filename for the
885 virtual section-as-bfd like the bfd filename containing the
886 section. Therefore use also non-canonical name form for the same
887 file containing the section. */
888 symbol_file_add_separate (abfd
, objfile
->original_name
, add_flags
,
892 do_cleanups (cleanup
);
894 if ((add_flags
& SYMFILE_NO_READ
) == 0)
895 require_partial_symbols (objfile
, 0);
898 /* Initialize entry point information for this objfile. */
901 init_entry_point_info (struct objfile
*objfile
)
903 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
909 /* Save startup file's range of PC addresses to help blockframe.c
910 decide where the bottom of the stack is. */
912 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
914 /* Executable file -- record its entry point so we'll recognize
915 the startup file because it contains the entry point. */
916 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
917 ei
->entry_point_p
= 1;
919 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
920 && bfd_get_start_address (objfile
->obfd
) != 0)
922 /* Some shared libraries may have entry points set and be
923 runnable. There's no clear way to indicate this, so just check
924 for values other than zero. */
925 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
926 ei
->entry_point_p
= 1;
930 /* Examination of non-executable.o files. Short-circuit this stuff. */
931 ei
->entry_point_p
= 0;
934 if (ei
->entry_point_p
)
936 struct obj_section
*osect
;
937 CORE_ADDR entry_point
= ei
->entry_point
;
940 /* Make certain that the address points at real code, and not a
941 function descriptor. */
943 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
947 /* Remove any ISA markers, so that this matches entries in the
950 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
953 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
955 struct bfd_section
*sect
= osect
->the_bfd_section
;
957 if (entry_point
>= bfd_get_section_vma (objfile
->obfd
, sect
)
958 && entry_point
< (bfd_get_section_vma (objfile
->obfd
, sect
)
959 + bfd_get_section_size (sect
)))
961 ei
->the_bfd_section_index
962 = gdb_bfd_section_index (objfile
->obfd
, sect
);
969 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
973 /* Process a symbol file, as either the main file or as a dynamically
976 This function does not set the OBJFILE's entry-point info.
978 OBJFILE is where the symbols are to be read from.
980 ADDRS is the list of section load addresses. If the user has given
981 an 'add-symbol-file' command, then this is the list of offsets and
982 addresses he or she provided as arguments to the command; or, if
983 we're handling a shared library, these are the actual addresses the
984 sections are loaded at, according to the inferior's dynamic linker
985 (as gleaned by GDB's shared library code). We convert each address
986 into an offset from the section VMA's as it appears in the object
987 file, and then call the file's sym_offsets function to convert this
988 into a format-specific offset table --- a `struct section_offsets'.
990 ADD_FLAGS encodes verbosity level, whether this is main symbol or
991 an extra symbol file such as dynamically loaded code, and wether
992 breakpoint reset should be deferred. */
995 syms_from_objfile_1 (struct objfile
*objfile
,
996 struct section_addr_info
*addrs
,
997 symfile_add_flags add_flags
)
999 struct section_addr_info
*local_addr
= NULL
;
1000 struct cleanup
*old_chain
;
1001 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1003 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
1005 if (objfile
->sf
== NULL
)
1007 /* No symbols to load, but we still need to make sure
1008 that the section_offsets table is allocated. */
1009 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
1010 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
1012 objfile
->num_sections
= num_sections
;
1013 objfile
->section_offsets
1014 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
1016 memset (objfile
->section_offsets
, 0, size
);
1020 /* Make sure that partially constructed symbol tables will be cleaned up
1021 if an error occurs during symbol reading. */
1022 old_chain
= make_cleanup_free_objfile (objfile
);
1024 /* If ADDRS is NULL, put together a dummy address list.
1025 We now establish the convention that an addr of zero means
1026 no load address was specified. */
1029 local_addr
= alloc_section_addr_info (1);
1030 make_cleanup (xfree
, local_addr
);
1036 /* We will modify the main symbol table, make sure that all its users
1037 will be cleaned up if an error occurs during symbol reading. */
1038 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1040 /* Since no error yet, throw away the old symbol table. */
1042 if (symfile_objfile
!= NULL
)
1044 free_objfile (symfile_objfile
);
1045 gdb_assert (symfile_objfile
== NULL
);
1048 /* Currently we keep symbols from the add-symbol-file command.
1049 If the user wants to get rid of them, they should do "symbol-file"
1050 without arguments first. Not sure this is the best behavior
1053 (*objfile
->sf
->sym_new_init
) (objfile
);
1056 /* Convert addr into an offset rather than an absolute address.
1057 We find the lowest address of a loaded segment in the objfile,
1058 and assume that <addr> is where that got loaded.
1060 We no longer warn if the lowest section is not a text segment (as
1061 happens for the PA64 port. */
1062 if (addrs
->num_sections
> 0)
1063 addr_info_make_relative (addrs
, objfile
->obfd
);
1065 /* Initialize symbol reading routines for this objfile, allow complaints to
1066 appear for this new file, and record how verbose to be, then do the
1067 initial symbol reading for this file. */
1069 (*objfile
->sf
->sym_init
) (objfile
);
1070 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1072 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1074 read_symbols (objfile
, add_flags
);
1076 /* Discard cleanups as symbol reading was successful. */
1078 discard_cleanups (old_chain
);
1082 /* Same as syms_from_objfile_1, but also initializes the objfile
1083 entry-point info. */
1086 syms_from_objfile (struct objfile
*objfile
,
1087 struct section_addr_info
*addrs
,
1088 symfile_add_flags add_flags
)
1090 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1091 init_entry_point_info (objfile
);
1094 /* Perform required actions after either reading in the initial
1095 symbols for a new objfile, or mapping in the symbols from a reusable
1096 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1099 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1101 /* If this is the main symbol file we have to clean up all users of the
1102 old main symbol file. Otherwise it is sufficient to fixup all the
1103 breakpoints that may have been redefined by this symbol file. */
1104 if (add_flags
& SYMFILE_MAINLINE
)
1106 /* OK, make it the "real" symbol file. */
1107 symfile_objfile
= objfile
;
1109 clear_symtab_users (add_flags
);
1111 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1113 breakpoint_re_set ();
1116 /* We're done reading the symbol file; finish off complaints. */
1117 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1120 /* Process a symbol file, as either the main file or as a dynamically
1123 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1124 A new reference is acquired by this function.
1126 For NAME description see allocate_objfile's definition.
1128 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1129 extra, such as dynamically loaded code, and what to do with breakpoins.
1131 ADDRS is as described for syms_from_objfile_1, above.
1132 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1134 PARENT is the original objfile if ABFD is a separate debug info file.
1135 Otherwise PARENT is NULL.
1137 Upon success, returns a pointer to the objfile that was added.
1138 Upon failure, jumps back to command level (never returns). */
1140 static struct objfile
*
1141 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1142 symfile_add_flags add_flags
,
1143 struct section_addr_info
*addrs
,
1144 objfile_flags flags
, struct objfile
*parent
)
1146 struct objfile
*objfile
;
1147 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1148 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1149 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1150 && (readnow_symbol_files
1151 || (add_flags
& SYMFILE_NO_READ
) == 0));
1153 if (readnow_symbol_files
)
1155 flags
|= OBJF_READNOW
;
1156 add_flags
&= ~SYMFILE_NO_READ
;
1159 /* Give user a chance to burp if we'd be
1160 interactively wiping out any existing symbols. */
1162 if ((have_full_symbols () || have_partial_symbols ())
1165 && !query (_("Load new symbol table from \"%s\"? "), name
))
1166 error (_("Not confirmed."));
1169 flags
|= OBJF_MAINLINE
;
1170 objfile
= allocate_objfile (abfd
, name
, flags
);
1173 add_separate_debug_objfile (objfile
, parent
);
1175 /* We either created a new mapped symbol table, mapped an existing
1176 symbol table file which has not had initial symbol reading
1177 performed, or need to read an unmapped symbol table. */
1180 if (deprecated_pre_add_symbol_hook
)
1181 deprecated_pre_add_symbol_hook (name
);
1184 printf_unfiltered (_("Reading symbols from %s..."), name
);
1186 gdb_flush (gdb_stdout
);
1189 syms_from_objfile (objfile
, addrs
, add_flags
);
1191 /* We now have at least a partial symbol table. Check to see if the
1192 user requested that all symbols be read on initial access via either
1193 the gdb startup command line or on a per symbol file basis. Expand
1194 all partial symbol tables for this objfile if so. */
1196 if ((flags
& OBJF_READNOW
))
1200 printf_unfiltered (_("expanding to full symbols..."));
1202 gdb_flush (gdb_stdout
);
1206 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1209 if (should_print
&& !objfile_has_symbols (objfile
))
1212 printf_unfiltered (_("(no debugging symbols found)..."));
1218 if (deprecated_post_add_symbol_hook
)
1219 deprecated_post_add_symbol_hook ();
1221 printf_unfiltered (_("done.\n"));
1224 /* We print some messages regardless of whether 'from_tty ||
1225 info_verbose' is true, so make sure they go out at the right
1227 gdb_flush (gdb_stdout
);
1229 if (objfile
->sf
== NULL
)
1231 observer_notify_new_objfile (objfile
);
1232 return objfile
; /* No symbols. */
1235 finish_new_objfile (objfile
, add_flags
);
1237 observer_notify_new_objfile (objfile
);
1239 bfd_cache_close_all ();
1243 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1244 see allocate_objfile's definition. */
1247 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1248 symfile_add_flags symfile_flags
,
1249 struct objfile
*objfile
)
1251 struct section_addr_info
*sap
;
1252 struct cleanup
*my_cleanup
;
1254 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1255 because sections of BFD may not match sections of OBJFILE and because
1256 vma may have been modified by tools such as prelink. */
1257 sap
= build_section_addr_info_from_objfile (objfile
);
1258 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1260 symbol_file_add_with_addrs
1261 (bfd
, name
, symfile_flags
, sap
,
1262 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1266 do_cleanups (my_cleanup
);
1269 /* Process the symbol file ABFD, as either the main file or as a
1270 dynamically loaded file.
1271 See symbol_file_add_with_addrs's comments for details. */
1274 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1275 symfile_add_flags add_flags
,
1276 struct section_addr_info
*addrs
,
1277 objfile_flags flags
, struct objfile
*parent
)
1279 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1283 /* Process a symbol file, as either the main file or as a dynamically
1284 loaded file. See symbol_file_add_with_addrs's comments for details. */
1287 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1288 struct section_addr_info
*addrs
, objfile_flags flags
)
1290 bfd
*bfd
= symfile_bfd_open (name
);
1291 struct cleanup
*cleanup
= make_cleanup_bfd_unref (bfd
);
1292 struct objfile
*objf
;
1294 objf
= symbol_file_add_from_bfd (bfd
, name
, add_flags
, addrs
, flags
, NULL
);
1295 do_cleanups (cleanup
);
1299 /* Call symbol_file_add() with default values and update whatever is
1300 affected by the loading of a new main().
1301 Used when the file is supplied in the gdb command line
1302 and by some targets with special loading requirements.
1303 The auxiliary function, symbol_file_add_main_1(), has the flags
1304 argument for the switches that can only be specified in the symbol_file
1308 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1310 symbol_file_add_main_1 (args
, add_flags
, 0);
1314 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1315 objfile_flags flags
)
1317 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1319 symbol_file_add (args
, add_flags
, NULL
, flags
);
1321 /* Getting new symbols may change our opinion about
1322 what is frameless. */
1323 reinit_frame_cache ();
1325 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1326 set_initial_language ();
1330 symbol_file_clear (int from_tty
)
1332 if ((have_full_symbols () || have_partial_symbols ())
1335 ? !query (_("Discard symbol table from `%s'? "),
1336 objfile_name (symfile_objfile
))
1337 : !query (_("Discard symbol table? "))))
1338 error (_("Not confirmed."));
1340 /* solib descriptors may have handles to objfiles. Wipe them before their
1341 objfiles get stale by free_all_objfiles. */
1342 no_shared_libraries (NULL
, from_tty
);
1344 free_all_objfiles ();
1346 gdb_assert (symfile_objfile
== NULL
);
1348 printf_unfiltered (_("No symbol file now.\n"));
1352 separate_debug_file_exists (const char *name
, unsigned long crc
,
1353 struct objfile
*parent_objfile
)
1355 unsigned long file_crc
;
1358 struct stat parent_stat
, abfd_stat
;
1359 int verified_as_different
;
1361 /* Find a separate debug info file as if symbols would be present in
1362 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1363 section can contain just the basename of PARENT_OBJFILE without any
1364 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1365 the separate debug infos with the same basename can exist. */
1367 if (filename_cmp (name
, objfile_name (parent_objfile
)) == 0)
1370 abfd
= gdb_bfd_open (name
, gnutarget
, -1);
1375 /* Verify symlinks were not the cause of filename_cmp name difference above.
1377 Some operating systems, e.g. Windows, do not provide a meaningful
1378 st_ino; they always set it to zero. (Windows does provide a
1379 meaningful st_dev.) Files accessed from gdbservers that do not
1380 support the vFile:fstat packet will also have st_ino set to zero.
1381 Do not indicate a duplicate library in either case. While there
1382 is no guarantee that a system that provides meaningful inode
1383 numbers will never set st_ino to zero, this is merely an
1384 optimization, so we do not need to worry about false negatives. */
1386 if (bfd_stat (abfd
, &abfd_stat
) == 0
1387 && abfd_stat
.st_ino
!= 0
1388 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1390 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1391 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1393 gdb_bfd_unref (abfd
);
1396 verified_as_different
= 1;
1399 verified_as_different
= 0;
1401 file_crc_p
= gdb_bfd_crc (abfd
, &file_crc
);
1403 gdb_bfd_unref (abfd
);
1408 if (crc
!= file_crc
)
1410 unsigned long parent_crc
;
1412 /* If the files could not be verified as different with
1413 bfd_stat then we need to calculate the parent's CRC
1414 to verify whether the files are different or not. */
1416 if (!verified_as_different
)
1418 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1422 if (verified_as_different
|| parent_crc
!= file_crc
)
1423 warning (_("the debug information found in \"%s\""
1424 " does not match \"%s\" (CRC mismatch).\n"),
1425 name
, objfile_name (parent_objfile
));
1433 char *debug_file_directory
= NULL
;
1435 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1436 struct cmd_list_element
*c
, const char *value
)
1438 fprintf_filtered (file
,
1439 _("The directory where separate debug "
1440 "symbols are searched for is \"%s\".\n"),
1444 #if ! defined (DEBUG_SUBDIRECTORY)
1445 #define DEBUG_SUBDIRECTORY ".debug"
1448 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1449 where the original file resides (may not be the same as
1450 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1451 looking for. CANON_DIR is the "realpath" form of DIR.
1452 DIR must contain a trailing '/'.
1453 Returns the path of the file with separate debug info, of NULL. */
1456 find_separate_debug_file (const char *dir
,
1457 const char *canon_dir
,
1458 const char *debuglink
,
1459 unsigned long crc32
, struct objfile
*objfile
)
1464 VEC (char_ptr
) *debugdir_vec
;
1465 struct cleanup
*back_to
;
1468 /* Set I to std::max (strlen (canon_dir), strlen (dir)). */
1470 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1471 i
= strlen (canon_dir
);
1474 = (char *) xmalloc (strlen (debug_file_directory
) + 1
1476 + strlen (DEBUG_SUBDIRECTORY
)
1478 + strlen (debuglink
)
1481 /* First try in the same directory as the original file. */
1482 strcpy (debugfile
, dir
);
1483 strcat (debugfile
, debuglink
);
1485 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1488 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1489 strcpy (debugfile
, dir
);
1490 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1491 strcat (debugfile
, "/");
1492 strcat (debugfile
, debuglink
);
1494 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1497 /* Then try in the global debugfile directories.
1499 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1500 cause "/..." lookups. */
1502 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1503 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1505 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1507 strcpy (debugfile
, debugdir
);
1508 strcat (debugfile
, "/");
1509 strcat (debugfile
, dir
);
1510 strcat (debugfile
, debuglink
);
1512 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1514 do_cleanups (back_to
);
1518 /* If the file is in the sysroot, try using its base path in the
1519 global debugfile directory. */
1520 if (canon_dir
!= NULL
1521 && filename_ncmp (canon_dir
, gdb_sysroot
,
1522 strlen (gdb_sysroot
)) == 0
1523 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1525 strcpy (debugfile
, debugdir
);
1526 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1527 strcat (debugfile
, "/");
1528 strcat (debugfile
, debuglink
);
1530 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1532 do_cleanups (back_to
);
1538 do_cleanups (back_to
);
1543 /* Modify PATH to contain only "[/]directory/" part of PATH.
1544 If there were no directory separators in PATH, PATH will be empty
1545 string on return. */
1548 terminate_after_last_dir_separator (char *path
)
1552 /* Strip off the final filename part, leaving the directory name,
1553 followed by a slash. The directory can be relative or absolute. */
1554 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1555 if (IS_DIR_SEPARATOR (path
[i
]))
1558 /* If I is -1 then no directory is present there and DIR will be "". */
1562 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1563 Returns pathname, or NULL. */
1566 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1569 char *dir
, *canon_dir
;
1571 unsigned long crc32
;
1572 struct cleanup
*cleanups
;
1574 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1576 if (debuglink
== NULL
)
1578 /* There's no separate debug info, hence there's no way we could
1579 load it => no warning. */
1583 cleanups
= make_cleanup (xfree
, debuglink
);
1584 dir
= xstrdup (objfile_name (objfile
));
1585 make_cleanup (xfree
, dir
);
1586 terminate_after_last_dir_separator (dir
);
1587 canon_dir
= lrealpath (dir
);
1589 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1593 if (debugfile
== NULL
)
1595 /* For PR gdb/9538, try again with realpath (if different from the
1600 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1601 && S_ISLNK (st_buf
.st_mode
))
1605 symlink_dir
= lrealpath (objfile_name (objfile
));
1606 if (symlink_dir
!= NULL
)
1608 make_cleanup (xfree
, symlink_dir
);
1609 terminate_after_last_dir_separator (symlink_dir
);
1610 if (strcmp (dir
, symlink_dir
) != 0)
1612 /* Different directory, so try using it. */
1613 debugfile
= find_separate_debug_file (symlink_dir
,
1623 do_cleanups (cleanups
);
1627 /* This is the symbol-file command. Read the file, analyze its
1628 symbols, and add a struct symtab to a symtab list. The syntax of
1629 the command is rather bizarre:
1631 1. The function buildargv implements various quoting conventions
1632 which are undocumented and have little or nothing in common with
1633 the way things are quoted (or not quoted) elsewhere in GDB.
1635 2. Options are used, which are not generally used in GDB (perhaps
1636 "set mapped on", "set readnow on" would be better)
1638 3. The order of options matters, which is contrary to GNU
1639 conventions (because it is confusing and inconvenient). */
1642 symbol_file_command (char *args
, int from_tty
)
1648 symbol_file_clear (from_tty
);
1652 char **argv
= gdb_buildargv (args
);
1653 objfile_flags flags
= OBJF_USERLOADED
;
1654 symfile_add_flags add_flags
= 0;
1655 struct cleanup
*cleanups
;
1659 add_flags
|= SYMFILE_VERBOSE
;
1661 cleanups
= make_cleanup_freeargv (argv
);
1662 while (*argv
!= NULL
)
1664 if (strcmp (*argv
, "-readnow") == 0)
1665 flags
|= OBJF_READNOW
;
1666 else if (**argv
== '-')
1667 error (_("unknown option `%s'"), *argv
);
1670 symbol_file_add_main_1 (*argv
, add_flags
, flags
);
1678 error (_("no symbol file name was specified"));
1680 do_cleanups (cleanups
);
1684 /* Set the initial language.
1686 FIXME: A better solution would be to record the language in the
1687 psymtab when reading partial symbols, and then use it (if known) to
1688 set the language. This would be a win for formats that encode the
1689 language in an easily discoverable place, such as DWARF. For
1690 stabs, we can jump through hoops looking for specially named
1691 symbols or try to intuit the language from the specific type of
1692 stabs we find, but we can't do that until later when we read in
1696 set_initial_language (void)
1698 enum language lang
= main_language ();
1700 if (lang
== language_unknown
)
1702 char *name
= main_name ();
1703 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1706 lang
= SYMBOL_LANGUAGE (sym
);
1709 if (lang
== language_unknown
)
1711 /* Make C the default language */
1715 set_language (lang
);
1716 expected_language
= current_language
; /* Don't warn the user. */
1719 /* Open the file specified by NAME and hand it off to BFD for
1720 preliminary analysis. Return a newly initialized bfd *, which
1721 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1722 absolute). In case of trouble, error() is called. */
1725 symfile_bfd_open (const char *name
)
1729 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
1731 if (!is_target_filename (name
))
1733 char *expanded_name
, *absolute_name
;
1735 expanded_name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1737 /* Look down path for it, allocate 2nd new malloc'd copy. */
1738 desc
= openp (getenv ("PATH"),
1739 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1740 expanded_name
, O_RDONLY
| O_BINARY
, &absolute_name
);
1741 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1744 char *exename
= (char *) alloca (strlen (expanded_name
) + 5);
1746 strcat (strcpy (exename
, expanded_name
), ".exe");
1747 desc
= openp (getenv ("PATH"),
1748 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1749 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1754 make_cleanup (xfree
, expanded_name
);
1755 perror_with_name (expanded_name
);
1758 xfree (expanded_name
);
1759 make_cleanup (xfree
, absolute_name
);
1760 name
= absolute_name
;
1763 sym_bfd
= gdb_bfd_open (name
, gnutarget
, desc
);
1765 error (_("`%s': can't open to read symbols: %s."), name
,
1766 bfd_errmsg (bfd_get_error ()));
1768 if (!gdb_bfd_has_target_filename (sym_bfd
))
1769 bfd_set_cacheable (sym_bfd
, 1);
1771 if (!bfd_check_format (sym_bfd
, bfd_object
))
1773 make_cleanup_bfd_unref (sym_bfd
);
1774 error (_("`%s': can't read symbols: %s."), name
,
1775 bfd_errmsg (bfd_get_error ()));
1778 do_cleanups (back_to
);
1783 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1784 the section was not found. */
1787 get_section_index (struct objfile
*objfile
, char *section_name
)
1789 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1797 /* Link SF into the global symtab_fns list.
1798 FLAVOUR is the file format that SF handles.
1799 Called on startup by the _initialize routine in each object file format
1800 reader, to register information about each format the reader is prepared
1804 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1806 registered_sym_fns fns
= { flavour
, sf
};
1808 VEC_safe_push (registered_sym_fns
, symtab_fns
, &fns
);
1811 /* Initialize OBJFILE to read symbols from its associated BFD. It
1812 either returns or calls error(). The result is an initialized
1813 struct sym_fns in the objfile structure, that contains cached
1814 information about the symbol file. */
1816 static const struct sym_fns
*
1817 find_sym_fns (bfd
*abfd
)
1819 registered_sym_fns
*rsf
;
1820 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1823 if (our_flavour
== bfd_target_srec_flavour
1824 || our_flavour
== bfd_target_ihex_flavour
1825 || our_flavour
== bfd_target_tekhex_flavour
)
1826 return NULL
; /* No symbols. */
1828 for (i
= 0; VEC_iterate (registered_sym_fns
, symtab_fns
, i
, rsf
); ++i
)
1829 if (our_flavour
== rsf
->sym_flavour
)
1830 return rsf
->sym_fns
;
1832 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1833 bfd_get_target (abfd
));
1837 /* This function runs the load command of our current target. */
1840 load_command (char *arg
, int from_tty
)
1842 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1846 /* The user might be reloading because the binary has changed. Take
1847 this opportunity to check. */
1848 reopen_exec_file ();
1856 parg
= arg
= get_exec_file (1);
1858 /* Count how many \ " ' tab space there are in the name. */
1859 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1867 /* We need to quote this string so buildargv can pull it apart. */
1868 char *temp
= (char *) xmalloc (strlen (arg
) + count
+ 1 );
1872 make_cleanup (xfree
, temp
);
1875 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1877 strncpy (ptemp
, prev
, parg
- prev
);
1878 ptemp
+= parg
- prev
;
1882 strcpy (ptemp
, prev
);
1888 target_load (arg
, from_tty
);
1890 /* After re-loading the executable, we don't really know which
1891 overlays are mapped any more. */
1892 overlay_cache_invalid
= 1;
1894 do_cleanups (cleanup
);
1897 /* This version of "load" should be usable for any target. Currently
1898 it is just used for remote targets, not inftarg.c or core files,
1899 on the theory that only in that case is it useful.
1901 Avoiding xmodem and the like seems like a win (a) because we don't have
1902 to worry about finding it, and (b) On VMS, fork() is very slow and so
1903 we don't want to run a subprocess. On the other hand, I'm not sure how
1904 performance compares. */
1906 static int validate_download
= 0;
1908 /* Callback service function for generic_load (bfd_map_over_sections). */
1911 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1913 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1915 *sum
+= bfd_get_section_size (asec
);
1918 /* Opaque data for load_section_callback. */
1919 struct load_section_data
{
1920 CORE_ADDR load_offset
;
1921 struct load_progress_data
*progress_data
;
1922 VEC(memory_write_request_s
) *requests
;
1925 /* Opaque data for load_progress. */
1926 struct load_progress_data
{
1927 /* Cumulative data. */
1928 unsigned long write_count
;
1929 unsigned long data_count
;
1930 bfd_size_type total_size
;
1933 /* Opaque data for load_progress for a single section. */
1934 struct load_progress_section_data
{
1935 struct load_progress_data
*cumulative
;
1937 /* Per-section data. */
1938 const char *section_name
;
1939 ULONGEST section_sent
;
1940 ULONGEST section_size
;
1945 /* Target write callback routine for progress reporting. */
1948 load_progress (ULONGEST bytes
, void *untyped_arg
)
1950 struct load_progress_section_data
*args
1951 = (struct load_progress_section_data
*) untyped_arg
;
1952 struct load_progress_data
*totals
;
1955 /* Writing padding data. No easy way to get at the cumulative
1956 stats, so just ignore this. */
1959 totals
= args
->cumulative
;
1961 if (bytes
== 0 && args
->section_sent
== 0)
1963 /* The write is just starting. Let the user know we've started
1965 ui_out_message (current_uiout
, "Loading section %s, size %s lma %s\n",
1966 args
->section_name
, hex_string (args
->section_size
),
1967 paddress (target_gdbarch (), args
->lma
));
1971 if (validate_download
)
1973 /* Broken memories and broken monitors manifest themselves here
1974 when bring new computers to life. This doubles already slow
1976 /* NOTE: cagney/1999-10-18: A more efficient implementation
1977 might add a verify_memory() method to the target vector and
1978 then use that. remote.c could implement that method using
1979 the ``qCRC'' packet. */
1980 gdb_byte
*check
= (gdb_byte
*) xmalloc (bytes
);
1981 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1983 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1984 error (_("Download verify read failed at %s"),
1985 paddress (target_gdbarch (), args
->lma
));
1986 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1987 error (_("Download verify compare failed at %s"),
1988 paddress (target_gdbarch (), args
->lma
));
1989 do_cleanups (verify_cleanups
);
1991 totals
->data_count
+= bytes
;
1993 args
->buffer
+= bytes
;
1994 totals
->write_count
+= 1;
1995 args
->section_sent
+= bytes
;
1996 if (check_quit_flag ()
1997 || (deprecated_ui_load_progress_hook
!= NULL
1998 && deprecated_ui_load_progress_hook (args
->section_name
,
1999 args
->section_sent
)))
2000 error (_("Canceled the download"));
2002 if (deprecated_show_load_progress
!= NULL
)
2003 deprecated_show_load_progress (args
->section_name
,
2007 totals
->total_size
);
2010 /* Callback service function for generic_load (bfd_map_over_sections). */
2013 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
2015 struct memory_write_request
*new_request
;
2016 struct load_section_data
*args
= (struct load_section_data
*) data
;
2017 struct load_progress_section_data
*section_data
;
2018 bfd_size_type size
= bfd_get_section_size (asec
);
2020 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
2022 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
2028 new_request
= VEC_safe_push (memory_write_request_s
,
2029 args
->requests
, NULL
);
2030 memset (new_request
, 0, sizeof (struct memory_write_request
));
2031 section_data
= XCNEW (struct load_progress_section_data
);
2032 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
2033 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
2035 new_request
->data
= (gdb_byte
*) xmalloc (size
);
2036 new_request
->baton
= section_data
;
2038 buffer
= new_request
->data
;
2040 section_data
->cumulative
= args
->progress_data
;
2041 section_data
->section_name
= sect_name
;
2042 section_data
->section_size
= size
;
2043 section_data
->lma
= new_request
->begin
;
2044 section_data
->buffer
= buffer
;
2046 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2049 /* Clean up an entire memory request vector, including load
2050 data and progress records. */
2053 clear_memory_write_data (void *arg
)
2055 VEC(memory_write_request_s
) **vec_p
= (VEC(memory_write_request_s
) **) arg
;
2056 VEC(memory_write_request_s
) *vec
= *vec_p
;
2058 struct memory_write_request
*mr
;
2060 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2065 VEC_free (memory_write_request_s
, vec
);
2068 static void print_transfer_performance (struct ui_file
*stream
,
2069 unsigned long data_count
,
2070 unsigned long write_count
,
2071 std::chrono::steady_clock::duration d
);
2074 generic_load (const char *args
, int from_tty
)
2078 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2079 struct load_section_data cbdata
;
2080 struct load_progress_data total_progress
;
2081 struct ui_out
*uiout
= current_uiout
;
2086 memset (&cbdata
, 0, sizeof (cbdata
));
2087 memset (&total_progress
, 0, sizeof (total_progress
));
2088 cbdata
.progress_data
= &total_progress
;
2090 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2093 error_no_arg (_("file to load"));
2095 argv
= gdb_buildargv (args
);
2096 make_cleanup_freeargv (argv
);
2098 filename
= tilde_expand (argv
[0]);
2099 make_cleanup (xfree
, filename
);
2101 if (argv
[1] != NULL
)
2105 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2107 /* If the last word was not a valid number then
2108 treat it as a file name with spaces in. */
2109 if (argv
[1] == endptr
)
2110 error (_("Invalid download offset:%s."), argv
[1]);
2112 if (argv
[2] != NULL
)
2113 error (_("Too many parameters."));
2116 /* Open the file for loading. */
2117 loadfile_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2118 if (loadfile_bfd
== NULL
)
2120 perror_with_name (filename
);
2124 make_cleanup_bfd_unref (loadfile_bfd
);
2126 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2128 error (_("\"%s\" is not an object file: %s"), filename
,
2129 bfd_errmsg (bfd_get_error ()));
2132 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2133 (void *) &total_progress
.total_size
);
2135 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2137 using namespace std::chrono
;
2139 steady_clock::time_point start_time
= steady_clock::now ();
2141 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2142 load_progress
) != 0)
2143 error (_("Load failed"));
2145 steady_clock::time_point end_time
= steady_clock::now ();
2147 entry
= bfd_get_start_address (loadfile_bfd
);
2148 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2149 ui_out_text (uiout
, "Start address ");
2150 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch (), entry
));
2151 ui_out_text (uiout
, ", load size ");
2152 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2153 ui_out_text (uiout
, "\n");
2154 regcache_write_pc (get_current_regcache (), entry
);
2156 /* Reset breakpoints, now that we have changed the load image. For
2157 instance, breakpoints may have been set (or reset, by
2158 post_create_inferior) while connected to the target but before we
2159 loaded the program. In that case, the prologue analyzer could
2160 have read instructions from the target to find the right
2161 breakpoint locations. Loading has changed the contents of that
2164 breakpoint_re_set ();
2166 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2167 total_progress
.write_count
,
2168 end_time
- start_time
);
2170 do_cleanups (old_cleanups
);
2173 /* Report on STREAM the performance of a memory transfer operation,
2174 such as 'load'. DATA_COUNT is the number of bytes transferred.
2175 WRITE_COUNT is the number of separate write operations, or 0, if
2176 that information is not available. TIME is how long the operation
2180 print_transfer_performance (struct ui_file
*stream
,
2181 unsigned long data_count
,
2182 unsigned long write_count
,
2183 std::chrono::steady_clock::duration time
)
2185 using namespace std::chrono
;
2186 struct ui_out
*uiout
= current_uiout
;
2188 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2190 ui_out_text (uiout
, "Transfer rate: ");
2191 if (ms
.count () > 0)
2193 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2195 if (ui_out_is_mi_like_p (uiout
))
2197 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2198 ui_out_text (uiout
, " bits/sec");
2200 else if (rate
< 1024)
2202 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2203 ui_out_text (uiout
, " bytes/sec");
2207 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2208 ui_out_text (uiout
, " KB/sec");
2213 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2214 ui_out_text (uiout
, " bits in <1 sec");
2216 if (write_count
> 0)
2218 ui_out_text (uiout
, ", ");
2219 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2220 ui_out_text (uiout
, " bytes/write");
2222 ui_out_text (uiout
, ".\n");
2225 /* This function allows the addition of incrementally linked object files.
2226 It does not modify any state in the target, only in the debugger. */
2227 /* Note: ezannoni 2000-04-13 This function/command used to have a
2228 special case syntax for the rombug target (Rombug is the boot
2229 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2230 rombug case, the user doesn't need to supply a text address,
2231 instead a call to target_link() (in target.c) would supply the
2232 value to use. We are now discontinuing this type of ad hoc syntax. */
2235 add_symbol_file_command (char *args
, int from_tty
)
2237 struct gdbarch
*gdbarch
= get_current_arch ();
2238 char *filename
= NULL
;
2240 int section_index
= 0;
2244 int expecting_sec_name
= 0;
2245 int expecting_sec_addr
= 0;
2247 struct objfile
*objf
;
2248 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2249 symfile_add_flags add_flags
= 0;
2252 add_flags
|= SYMFILE_VERBOSE
;
2260 struct section_addr_info
*section_addrs
;
2261 struct sect_opt
*sect_opts
= NULL
;
2262 size_t num_sect_opts
= 0;
2263 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2266 sect_opts
= XNEWVEC (struct sect_opt
, num_sect_opts
);
2271 error (_("add-symbol-file takes a file name and an address"));
2273 argv
= gdb_buildargv (args
);
2274 make_cleanup_freeargv (argv
);
2276 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2278 /* Process the argument. */
2281 /* The first argument is the file name. */
2282 filename
= tilde_expand (arg
);
2283 make_cleanup (xfree
, filename
);
2285 else if (argcnt
== 1)
2287 /* The second argument is always the text address at which
2288 to load the program. */
2289 sect_opts
[section_index
].name
= ".text";
2290 sect_opts
[section_index
].value
= arg
;
2291 if (++section_index
>= num_sect_opts
)
2294 sect_opts
= ((struct sect_opt
*)
2295 xrealloc (sect_opts
,
2297 * sizeof (struct sect_opt
)));
2302 /* It's an option (starting with '-') or it's an argument
2304 if (expecting_sec_name
)
2306 sect_opts
[section_index
].name
= arg
;
2307 expecting_sec_name
= 0;
2309 else if (expecting_sec_addr
)
2311 sect_opts
[section_index
].value
= arg
;
2312 expecting_sec_addr
= 0;
2313 if (++section_index
>= num_sect_opts
)
2316 sect_opts
= ((struct sect_opt
*)
2317 xrealloc (sect_opts
,
2319 * sizeof (struct sect_opt
)));
2322 else if (strcmp (arg
, "-readnow") == 0)
2323 flags
|= OBJF_READNOW
;
2324 else if (strcmp (arg
, "-s") == 0)
2326 expecting_sec_name
= 1;
2327 expecting_sec_addr
= 1;
2330 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2331 " [-readnow] [-s <secname> <addr>]*"));
2335 /* This command takes at least two arguments. The first one is a
2336 filename, and the second is the address where this file has been
2337 loaded. Abort now if this address hasn't been provided by the
2339 if (section_index
< 1)
2340 error (_("The address where %s has been loaded is missing"), filename
);
2342 /* Print the prompt for the query below. And save the arguments into
2343 a sect_addr_info structure to be passed around to other
2344 functions. We have to split this up into separate print
2345 statements because hex_string returns a local static
2348 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2349 section_addrs
= alloc_section_addr_info (section_index
);
2350 make_cleanup (xfree
, section_addrs
);
2351 for (i
= 0; i
< section_index
; i
++)
2354 char *val
= sect_opts
[i
].value
;
2355 char *sec
= sect_opts
[i
].name
;
2357 addr
= parse_and_eval_address (val
);
2359 /* Here we store the section offsets in the order they were
2360 entered on the command line. */
2361 section_addrs
->other
[sec_num
].name
= sec
;
2362 section_addrs
->other
[sec_num
].addr
= addr
;
2363 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2364 paddress (gdbarch
, addr
));
2367 /* The object's sections are initialized when a
2368 call is made to build_objfile_section_table (objfile).
2369 This happens in reread_symbols.
2370 At this point, we don't know what file type this is,
2371 so we can't determine what section names are valid. */
2373 section_addrs
->num_sections
= sec_num
;
2375 if (from_tty
&& (!query ("%s", "")))
2376 error (_("Not confirmed."));
2378 objf
= symbol_file_add (filename
, add_flags
, section_addrs
, flags
);
2380 add_target_sections_of_objfile (objf
);
2382 /* Getting new symbols may change our opinion about what is
2384 reinit_frame_cache ();
2385 do_cleanups (my_cleanups
);
2389 /* This function removes a symbol file that was added via add-symbol-file. */
2392 remove_symbol_file_command (char *args
, int from_tty
)
2395 struct objfile
*objf
= NULL
;
2396 struct cleanup
*my_cleanups
;
2397 struct program_space
*pspace
= current_program_space
;
2402 error (_("remove-symbol-file: no symbol file provided"));
2404 my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2406 argv
= gdb_buildargv (args
);
2408 if (strcmp (argv
[0], "-a") == 0)
2410 /* Interpret the next argument as an address. */
2413 if (argv
[1] == NULL
)
2414 error (_("Missing address argument"));
2416 if (argv
[2] != NULL
)
2417 error (_("Junk after %s"), argv
[1]);
2419 addr
= parse_and_eval_address (argv
[1]);
2423 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2424 && (objf
->flags
& OBJF_SHARED
) != 0
2425 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2429 else if (argv
[0] != NULL
)
2431 /* Interpret the current argument as a file name. */
2434 if (argv
[1] != NULL
)
2435 error (_("Junk after %s"), argv
[0]);
2437 filename
= tilde_expand (argv
[0]);
2438 make_cleanup (xfree
, filename
);
2442 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2443 && (objf
->flags
& OBJF_SHARED
) != 0
2444 && objf
->pspace
== pspace
2445 && filename_cmp (filename
, objfile_name (objf
)) == 0)
2451 error (_("No symbol file found"));
2454 && !query (_("Remove symbol table from file \"%s\"? "),
2455 objfile_name (objf
)))
2456 error (_("Not confirmed."));
2458 free_objfile (objf
);
2459 clear_symtab_users (0);
2461 do_cleanups (my_cleanups
);
2464 typedef struct objfile
*objfilep
;
2466 DEF_VEC_P (objfilep
);
2468 /* Re-read symbols if a symbol-file has changed. */
2471 reread_symbols (void)
2473 struct objfile
*objfile
;
2475 struct stat new_statbuf
;
2477 VEC (objfilep
) *new_objfiles
= NULL
;
2478 struct cleanup
*all_cleanups
;
2480 all_cleanups
= make_cleanup (VEC_cleanup (objfilep
), &new_objfiles
);
2482 /* With the addition of shared libraries, this should be modified,
2483 the load time should be saved in the partial symbol tables, since
2484 different tables may come from different source files. FIXME.
2485 This routine should then walk down each partial symbol table
2486 and see if the symbol table that it originates from has been changed. */
2488 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2490 if (objfile
->obfd
== NULL
)
2493 /* Separate debug objfiles are handled in the main objfile. */
2494 if (objfile
->separate_debug_objfile_backlink
)
2497 /* If this object is from an archive (what you usually create with
2498 `ar', often called a `static library' on most systems, though
2499 a `shared library' on AIX is also an archive), then you should
2500 stat on the archive name, not member name. */
2501 if (objfile
->obfd
->my_archive
)
2502 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2504 res
= stat (objfile_name (objfile
), &new_statbuf
);
2507 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2508 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2509 objfile_name (objfile
));
2512 new_modtime
= new_statbuf
.st_mtime
;
2513 if (new_modtime
!= objfile
->mtime
)
2515 struct cleanup
*old_cleanups
;
2516 struct section_offsets
*offsets
;
2518 char *original_name
;
2520 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2521 objfile_name (objfile
));
2523 /* There are various functions like symbol_file_add,
2524 symfile_bfd_open, syms_from_objfile, etc., which might
2525 appear to do what we want. But they have various other
2526 effects which we *don't* want. So we just do stuff
2527 ourselves. We don't worry about mapped files (for one thing,
2528 any mapped file will be out of date). */
2530 /* If we get an error, blow away this objfile (not sure if
2531 that is the correct response for things like shared
2533 old_cleanups
= make_cleanup_free_objfile (objfile
);
2534 /* We need to do this whenever any symbols go away. */
2535 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2537 if (exec_bfd
!= NULL
2538 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2539 bfd_get_filename (exec_bfd
)) == 0)
2541 /* Reload EXEC_BFD without asking anything. */
2543 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2546 /* Keep the calls order approx. the same as in free_objfile. */
2548 /* Free the separate debug objfiles. It will be
2549 automatically recreated by sym_read. */
2550 free_objfile_separate_debug (objfile
);
2552 /* Remove any references to this objfile in the global
2554 preserve_values (objfile
);
2556 /* Nuke all the state that we will re-read. Much of the following
2557 code which sets things to NULL really is necessary to tell
2558 other parts of GDB that there is nothing currently there.
2560 Try to keep the freeing order compatible with free_objfile. */
2562 if (objfile
->sf
!= NULL
)
2564 (*objfile
->sf
->sym_finish
) (objfile
);
2567 clear_objfile_data (objfile
);
2569 /* Clean up any state BFD has sitting around. */
2571 struct bfd
*obfd
= objfile
->obfd
;
2572 char *obfd_filename
;
2574 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2575 /* Open the new BFD before freeing the old one, so that
2576 the filename remains live. */
2577 objfile
->obfd
= gdb_bfd_open (obfd_filename
, gnutarget
, -1);
2578 if (objfile
->obfd
== NULL
)
2580 /* We have to make a cleanup and error here, rather
2581 than erroring later, because once we unref OBFD,
2582 OBFD_FILENAME will be freed. */
2583 make_cleanup_bfd_unref (obfd
);
2584 error (_("Can't open %s to read symbols."), obfd_filename
);
2586 gdb_bfd_unref (obfd
);
2589 original_name
= xstrdup (objfile
->original_name
);
2590 make_cleanup (xfree
, original_name
);
2592 /* bfd_openr sets cacheable to true, which is what we want. */
2593 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2594 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2595 bfd_errmsg (bfd_get_error ()));
2597 /* Save the offsets, we will nuke them with the rest of the
2599 num_offsets
= objfile
->num_sections
;
2600 offsets
= ((struct section_offsets
*)
2601 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2602 memcpy (offsets
, objfile
->section_offsets
,
2603 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2605 /* FIXME: Do we have to free a whole linked list, or is this
2607 if (objfile
->global_psymbols
.list
)
2608 xfree (objfile
->global_psymbols
.list
);
2609 memset (&objfile
->global_psymbols
, 0,
2610 sizeof (objfile
->global_psymbols
));
2611 if (objfile
->static_psymbols
.list
)
2612 xfree (objfile
->static_psymbols
.list
);
2613 memset (&objfile
->static_psymbols
, 0,
2614 sizeof (objfile
->static_psymbols
));
2616 /* Free the obstacks for non-reusable objfiles. */
2617 psymbol_bcache_free (objfile
->psymbol_cache
);
2618 objfile
->psymbol_cache
= psymbol_bcache_init ();
2619 obstack_free (&objfile
->objfile_obstack
, 0);
2620 objfile
->sections
= NULL
;
2621 objfile
->compunit_symtabs
= NULL
;
2622 objfile
->psymtabs
= NULL
;
2623 objfile
->psymtabs_addrmap
= NULL
;
2624 objfile
->free_psymtabs
= NULL
;
2625 objfile
->template_symbols
= NULL
;
2627 /* obstack_init also initializes the obstack so it is
2628 empty. We could use obstack_specify_allocation but
2629 gdb_obstack.h specifies the alloc/dealloc functions. */
2630 obstack_init (&objfile
->objfile_obstack
);
2632 /* set_objfile_per_bfd potentially allocates the per-bfd
2633 data on the objfile's obstack (if sharing data across
2634 multiple users is not possible), so it's important to
2635 do it *after* the obstack has been initialized. */
2636 set_objfile_per_bfd (objfile
);
2638 objfile
->original_name
2639 = (char *) obstack_copy0 (&objfile
->objfile_obstack
, original_name
,
2640 strlen (original_name
));
2642 /* Reset the sym_fns pointer. The ELF reader can change it
2643 based on whether .gdb_index is present, and we need it to
2644 start over. PR symtab/15885 */
2645 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2647 build_objfile_section_table (objfile
);
2648 terminate_minimal_symbol_table (objfile
);
2650 /* We use the same section offsets as from last time. I'm not
2651 sure whether that is always correct for shared libraries. */
2652 objfile
->section_offsets
= (struct section_offsets
*)
2653 obstack_alloc (&objfile
->objfile_obstack
,
2654 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2655 memcpy (objfile
->section_offsets
, offsets
,
2656 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2657 objfile
->num_sections
= num_offsets
;
2659 /* What the hell is sym_new_init for, anyway? The concept of
2660 distinguishing between the main file and additional files
2661 in this way seems rather dubious. */
2662 if (objfile
== symfile_objfile
)
2664 (*objfile
->sf
->sym_new_init
) (objfile
);
2667 (*objfile
->sf
->sym_init
) (objfile
);
2668 clear_complaints (&symfile_complaints
, 1, 1);
2670 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2671 read_symbols (objfile
, 0);
2673 if (!objfile_has_symbols (objfile
))
2676 printf_unfiltered (_("(no debugging symbols found)\n"));
2680 /* We're done reading the symbol file; finish off complaints. */
2681 clear_complaints (&symfile_complaints
, 0, 1);
2683 /* Getting new symbols may change our opinion about what is
2686 reinit_frame_cache ();
2688 /* Discard cleanups as symbol reading was successful. */
2689 discard_cleanups (old_cleanups
);
2691 /* If the mtime has changed between the time we set new_modtime
2692 and now, we *want* this to be out of date, so don't call stat
2694 objfile
->mtime
= new_modtime
;
2695 init_entry_point_info (objfile
);
2697 VEC_safe_push (objfilep
, new_objfiles
, objfile
);
2705 /* Notify objfiles that we've modified objfile sections. */
2706 objfiles_changed ();
2708 clear_symtab_users (0);
2710 /* clear_objfile_data for each objfile was called before freeing it and
2711 observer_notify_new_objfile (NULL) has been called by
2712 clear_symtab_users above. Notify the new files now. */
2713 for (ix
= 0; VEC_iterate (objfilep
, new_objfiles
, ix
, objfile
); ix
++)
2714 observer_notify_new_objfile (objfile
);
2716 /* At least one objfile has changed, so we can consider that
2717 the executable we're debugging has changed too. */
2718 observer_notify_executable_changed ();
2721 do_cleanups (all_cleanups
);
2729 } filename_language
;
2731 DEF_VEC_O (filename_language
);
2733 static VEC (filename_language
) *filename_language_table
;
2735 /* See symfile.h. */
2738 add_filename_language (const char *ext
, enum language lang
)
2740 filename_language entry
;
2742 entry
.ext
= xstrdup (ext
);
2745 VEC_safe_push (filename_language
, filename_language_table
, &entry
);
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
;
2765 filename_language
*entry
;
2767 /* First arg is filename extension, starting with '.' */
2769 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2771 /* Find end of first arg. */
2772 while (*cp
&& !isspace (*cp
))
2776 error (_("'%s': two arguments required -- "
2777 "filename extension and language"),
2780 /* Null-terminate first arg. */
2783 /* Find beginning of second arg, which should be a source language. */
2784 cp
= skip_spaces (cp
);
2787 error (_("'%s': two arguments required -- "
2788 "filename extension and language"),
2791 /* Lookup the language from among those we know. */
2792 lang
= language_enum (cp
);
2794 /* Now lookup the filename extension: do we already know it? */
2796 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2799 if (0 == strcmp (ext_args
, entry
->ext
))
2805 /* New file extension. */
2806 add_filename_language (ext_args
, lang
);
2810 /* Redefining a previously known filename extension. */
2813 /* query ("Really make files of type %s '%s'?", */
2814 /* ext_args, language_str (lang)); */
2817 entry
->ext
= xstrdup (ext_args
);
2823 info_ext_lang_command (char *args
, int from_tty
)
2826 filename_language
*entry
;
2828 printf_filtered (_("Filename extensions and the languages they represent:"));
2829 printf_filtered ("\n\n");
2831 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2833 printf_filtered ("\t%s\t- %s\n", entry
->ext
, language_str (entry
->lang
));
2837 deduce_language_from_filename (const char *filename
)
2842 if (filename
!= NULL
)
2843 if ((cp
= strrchr (filename
, '.')) != NULL
)
2845 filename_language
*entry
;
2848 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2850 if (strcmp (cp
, entry
->ext
) == 0)
2854 return language_unknown
;
2857 /* Allocate and initialize a new symbol table.
2858 CUST is from the result of allocate_compunit_symtab. */
2861 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2863 struct objfile
*objfile
= cust
->objfile
;
2864 struct symtab
*symtab
2865 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2868 = (const char *) bcache (filename
, strlen (filename
) + 1,
2869 objfile
->per_bfd
->filename_cache
);
2870 symtab
->fullname
= NULL
;
2871 symtab
->language
= deduce_language_from_filename (filename
);
2873 /* This can be very verbose with lots of headers.
2874 Only print at higher debug levels. */
2875 if (symtab_create_debug
>= 2)
2877 /* Be a bit clever with debugging messages, and don't print objfile
2878 every time, only when it changes. */
2879 static char *last_objfile_name
= NULL
;
2881 if (last_objfile_name
== NULL
2882 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2884 xfree (last_objfile_name
);
2885 last_objfile_name
= xstrdup (objfile_name (objfile
));
2886 fprintf_unfiltered (gdb_stdlog
,
2887 "Creating one or more symtabs for objfile %s ...\n",
2890 fprintf_unfiltered (gdb_stdlog
,
2891 "Created symtab %s for module %s.\n",
2892 host_address_to_string (symtab
), filename
);
2895 /* Add it to CUST's list of symtabs. */
2896 if (cust
->filetabs
== NULL
)
2898 cust
->filetabs
= symtab
;
2899 cust
->last_filetab
= symtab
;
2903 cust
->last_filetab
->next
= symtab
;
2904 cust
->last_filetab
= symtab
;
2907 /* Backlink to the containing compunit symtab. */
2908 symtab
->compunit_symtab
= cust
;
2913 /* Allocate and initialize a new compunit.
2914 NAME is the name of the main source file, if there is one, or some
2915 descriptive text if there are no source files. */
2917 struct compunit_symtab
*
2918 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2920 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2921 struct compunit_symtab
);
2922 const char *saved_name
;
2924 cu
->objfile
= objfile
;
2926 /* The name we record here is only for display/debugging purposes.
2927 Just save the basename to avoid path issues (too long for display,
2928 relative vs absolute, etc.). */
2929 saved_name
= lbasename (name
);
2931 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2932 strlen (saved_name
));
2934 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2936 if (symtab_create_debug
)
2938 fprintf_unfiltered (gdb_stdlog
,
2939 "Created compunit symtab %s for %s.\n",
2940 host_address_to_string (cu
),
2947 /* Hook CU to the objfile it comes from. */
2950 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2952 cu
->next
= cu
->objfile
->compunit_symtabs
;
2953 cu
->objfile
->compunit_symtabs
= cu
;
2957 /* Reset all data structures in gdb which may contain references to
2958 symbol table data. */
2961 clear_symtab_users (symfile_add_flags add_flags
)
2963 /* Someday, we should do better than this, by only blowing away
2964 the things that really need to be blown. */
2966 /* Clear the "current" symtab first, because it is no longer valid.
2967 breakpoint_re_set may try to access the current symtab. */
2968 clear_current_source_symtab_and_line ();
2971 clear_last_displayed_sal ();
2972 clear_pc_function_cache ();
2973 observer_notify_new_objfile (NULL
);
2975 /* Clear globals which might have pointed into a removed objfile.
2976 FIXME: It's not clear which of these are supposed to persist
2977 between expressions and which ought to be reset each time. */
2978 expression_context_block
= NULL
;
2979 innermost_block
= NULL
;
2981 /* Varobj may refer to old symbols, perform a cleanup. */
2982 varobj_invalidate ();
2984 /* Now that the various caches have been cleared, we can re_set
2985 our breakpoints without risking it using stale data. */
2986 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2987 breakpoint_re_set ();
2991 clear_symtab_users_cleanup (void *ignore
)
2993 clear_symtab_users (0);
2997 The following code implements an abstraction for debugging overlay sections.
2999 The target model is as follows:
3000 1) The gnu linker will permit multiple sections to be mapped into the
3001 same VMA, each with its own unique LMA (or load address).
3002 2) It is assumed that some runtime mechanism exists for mapping the
3003 sections, one by one, from the load address into the VMA address.
3004 3) This code provides a mechanism for gdb to keep track of which
3005 sections should be considered to be mapped from the VMA to the LMA.
3006 This information is used for symbol lookup, and memory read/write.
3007 For instance, if a section has been mapped then its contents
3008 should be read from the VMA, otherwise from the LMA.
3010 Two levels of debugger support for overlays are available. One is
3011 "manual", in which the debugger relies on the user to tell it which
3012 overlays are currently mapped. This level of support is
3013 implemented entirely in the core debugger, and the information about
3014 whether a section is mapped is kept in the objfile->obj_section table.
3016 The second level of support is "automatic", and is only available if
3017 the target-specific code provides functionality to read the target's
3018 overlay mapping table, and translate its contents for the debugger
3019 (by updating the mapped state information in the obj_section tables).
3021 The interface is as follows:
3023 overlay map <name> -- tell gdb to consider this section mapped
3024 overlay unmap <name> -- tell gdb to consider this section unmapped
3025 overlay list -- list the sections that GDB thinks are mapped
3026 overlay read-target -- get the target's state of what's mapped
3027 overlay off/manual/auto -- set overlay debugging state
3028 Functional interface:
3029 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3030 section, return that section.
3031 find_pc_overlay(pc): find any overlay section that contains
3032 the pc, either in its VMA or its LMA
3033 section_is_mapped(sect): true if overlay is marked as mapped
3034 section_is_overlay(sect): true if section's VMA != LMA
3035 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3036 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3037 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3038 overlay_mapped_address(...): map an address from section's LMA to VMA
3039 overlay_unmapped_address(...): map an address from section's VMA to LMA
3040 symbol_overlayed_address(...): Return a "current" address for symbol:
3041 either in VMA or LMA depending on whether
3042 the symbol's section is currently mapped. */
3044 /* Overlay debugging state: */
3046 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3047 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
3049 /* Function: section_is_overlay (SECTION)
3050 Returns true if SECTION has VMA not equal to LMA, ie.
3051 SECTION is loaded at an address different from where it will "run". */
3054 section_is_overlay (struct obj_section
*section
)
3056 if (overlay_debugging
&& section
)
3058 bfd
*abfd
= section
->objfile
->obfd
;
3059 asection
*bfd_section
= section
->the_bfd_section
;
3061 if (bfd_section_lma (abfd
, bfd_section
) != 0
3062 && bfd_section_lma (abfd
, bfd_section
)
3063 != bfd_section_vma (abfd
, bfd_section
))
3070 /* Function: overlay_invalidate_all (void)
3071 Invalidate the mapped state of all overlay sections (mark it as stale). */
3074 overlay_invalidate_all (void)
3076 struct objfile
*objfile
;
3077 struct obj_section
*sect
;
3079 ALL_OBJSECTIONS (objfile
, sect
)
3080 if (section_is_overlay (sect
))
3081 sect
->ovly_mapped
= -1;
3084 /* Function: section_is_mapped (SECTION)
3085 Returns true if section is an overlay, and is currently mapped.
3087 Access to the ovly_mapped flag is restricted to this function, so
3088 that we can do automatic update. If the global flag
3089 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3090 overlay_invalidate_all. If the mapped state of the particular
3091 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3094 section_is_mapped (struct obj_section
*osect
)
3096 struct gdbarch
*gdbarch
;
3098 if (osect
== 0 || !section_is_overlay (osect
))
3101 switch (overlay_debugging
)
3105 return 0; /* overlay debugging off */
3106 case ovly_auto
: /* overlay debugging automatic */
3107 /* Unles there is a gdbarch_overlay_update function,
3108 there's really nothing useful to do here (can't really go auto). */
3109 gdbarch
= get_objfile_arch (osect
->objfile
);
3110 if (gdbarch_overlay_update_p (gdbarch
))
3112 if (overlay_cache_invalid
)
3114 overlay_invalidate_all ();
3115 overlay_cache_invalid
= 0;
3117 if (osect
->ovly_mapped
== -1)
3118 gdbarch_overlay_update (gdbarch
, osect
);
3120 /* fall thru to manual case */
3121 case ovly_on
: /* overlay debugging manual */
3122 return osect
->ovly_mapped
== 1;
3126 /* Function: pc_in_unmapped_range
3127 If PC falls into the lma range of SECTION, return true, else false. */
3130 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3132 if (section_is_overlay (section
))
3134 bfd
*abfd
= section
->objfile
->obfd
;
3135 asection
*bfd_section
= section
->the_bfd_section
;
3137 /* We assume the LMA is relocated by the same offset as the VMA. */
3138 bfd_vma size
= bfd_get_section_size (bfd_section
);
3139 CORE_ADDR offset
= obj_section_offset (section
);
3141 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3142 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3149 /* Function: pc_in_mapped_range
3150 If PC falls into the vma range of SECTION, return true, else false. */
3153 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3155 if (section_is_overlay (section
))
3157 if (obj_section_addr (section
) <= pc
3158 && pc
< obj_section_endaddr (section
))
3165 /* Return true if the mapped ranges of sections A and B overlap, false
3169 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3171 CORE_ADDR a_start
= obj_section_addr (a
);
3172 CORE_ADDR a_end
= obj_section_endaddr (a
);
3173 CORE_ADDR b_start
= obj_section_addr (b
);
3174 CORE_ADDR b_end
= obj_section_endaddr (b
);
3176 return (a_start
< b_end
&& b_start
< a_end
);
3179 /* Function: overlay_unmapped_address (PC, SECTION)
3180 Returns the address corresponding to PC in the unmapped (load) range.
3181 May be the same as PC. */
3184 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3186 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3188 bfd
*abfd
= section
->objfile
->obfd
;
3189 asection
*bfd_section
= section
->the_bfd_section
;
3191 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3192 - bfd_section_vma (abfd
, bfd_section
);
3198 /* Function: overlay_mapped_address (PC, SECTION)
3199 Returns the address corresponding to PC in the mapped (runtime) range.
3200 May be the same as PC. */
3203 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3205 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3207 bfd
*abfd
= section
->objfile
->obfd
;
3208 asection
*bfd_section
= section
->the_bfd_section
;
3210 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3211 - bfd_section_lma (abfd
, bfd_section
);
3217 /* Function: symbol_overlayed_address
3218 Return one of two addresses (relative to the VMA or to the LMA),
3219 depending on whether the section is mapped or not. */
3222 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3224 if (overlay_debugging
)
3226 /* If the symbol has no section, just return its regular address. */
3229 /* If the symbol's section is not an overlay, just return its
3231 if (!section_is_overlay (section
))
3233 /* If the symbol's section is mapped, just return its address. */
3234 if (section_is_mapped (section
))
3237 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3238 * then return its LOADED address rather than its vma address!!
3240 return overlay_unmapped_address (address
, section
);
3245 /* Function: find_pc_overlay (PC)
3246 Return the best-match overlay section for PC:
3247 If PC matches a mapped overlay section's VMA, return that section.
3248 Else if PC matches an unmapped section's VMA, return that section.
3249 Else if PC matches an unmapped section's LMA, return that section. */
3251 struct obj_section
*
3252 find_pc_overlay (CORE_ADDR pc
)
3254 struct objfile
*objfile
;
3255 struct obj_section
*osect
, *best_match
= NULL
;
3257 if (overlay_debugging
)
3259 ALL_OBJSECTIONS (objfile
, osect
)
3260 if (section_is_overlay (osect
))
3262 if (pc_in_mapped_range (pc
, osect
))
3264 if (section_is_mapped (osect
))
3269 else if (pc_in_unmapped_range (pc
, osect
))
3276 /* Function: find_pc_mapped_section (PC)
3277 If PC falls into the VMA address range of an overlay section that is
3278 currently marked as MAPPED, return that section. Else return NULL. */
3280 struct obj_section
*
3281 find_pc_mapped_section (CORE_ADDR pc
)
3283 struct objfile
*objfile
;
3284 struct obj_section
*osect
;
3286 if (overlay_debugging
)
3288 ALL_OBJSECTIONS (objfile
, osect
)
3289 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3296 /* Function: list_overlays_command
3297 Print a list of mapped sections and their PC ranges. */
3300 list_overlays_command (char *args
, int from_tty
)
3303 struct objfile
*objfile
;
3304 struct obj_section
*osect
;
3306 if (overlay_debugging
)
3308 ALL_OBJSECTIONS (objfile
, osect
)
3309 if (section_is_mapped (osect
))
3311 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3316 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3317 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3318 size
= bfd_get_section_size (osect
->the_bfd_section
);
3319 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3321 printf_filtered ("Section %s, loaded at ", name
);
3322 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3323 puts_filtered (" - ");
3324 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3325 printf_filtered (", mapped at ");
3326 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3327 puts_filtered (" - ");
3328 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3329 puts_filtered ("\n");
3335 printf_filtered (_("No sections are mapped.\n"));
3338 /* Function: map_overlay_command
3339 Mark the named section as mapped (ie. residing at its VMA address). */
3342 map_overlay_command (char *args
, int from_tty
)
3344 struct objfile
*objfile
, *objfile2
;
3345 struct obj_section
*sec
, *sec2
;
3347 if (!overlay_debugging
)
3348 error (_("Overlay debugging not enabled. Use "
3349 "either the 'overlay auto' or\n"
3350 "the 'overlay manual' command."));
3352 if (args
== 0 || *args
== 0)
3353 error (_("Argument required: name of an overlay section"));
3355 /* First, find a section matching the user supplied argument. */
3356 ALL_OBJSECTIONS (objfile
, sec
)
3357 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3359 /* Now, check to see if the section is an overlay. */
3360 if (!section_is_overlay (sec
))
3361 continue; /* not an overlay section */
3363 /* Mark the overlay as "mapped". */
3364 sec
->ovly_mapped
= 1;
3366 /* Next, make a pass and unmap any sections that are
3367 overlapped by this new section: */
3368 ALL_OBJSECTIONS (objfile2
, sec2
)
3369 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3372 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3373 bfd_section_name (objfile
->obfd
,
3374 sec2
->the_bfd_section
));
3375 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3379 error (_("No overlay section called %s"), args
);
3382 /* Function: unmap_overlay_command
3383 Mark the overlay section as unmapped
3384 (ie. resident in its LMA address range, rather than the VMA range). */
3387 unmap_overlay_command (char *args
, int from_tty
)
3389 struct objfile
*objfile
;
3390 struct obj_section
*sec
= NULL
;
3392 if (!overlay_debugging
)
3393 error (_("Overlay debugging not enabled. "
3394 "Use either the 'overlay auto' or\n"
3395 "the 'overlay manual' command."));
3397 if (args
== 0 || *args
== 0)
3398 error (_("Argument required: name of an overlay section"));
3400 /* First, find a section matching the user supplied argument. */
3401 ALL_OBJSECTIONS (objfile
, sec
)
3402 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3404 if (!sec
->ovly_mapped
)
3405 error (_("Section %s is not mapped"), args
);
3406 sec
->ovly_mapped
= 0;
3409 error (_("No overlay section called %s"), args
);
3412 /* Function: overlay_auto_command
3413 A utility command to turn on overlay debugging.
3414 Possibly this should be done via a set/show command. */
3417 overlay_auto_command (char *args
, int from_tty
)
3419 overlay_debugging
= ovly_auto
;
3420 enable_overlay_breakpoints ();
3422 printf_unfiltered (_("Automatic overlay debugging enabled."));
3425 /* Function: overlay_manual_command
3426 A utility command to turn on overlay debugging.
3427 Possibly this should be done via a set/show command. */
3430 overlay_manual_command (char *args
, int from_tty
)
3432 overlay_debugging
= ovly_on
;
3433 disable_overlay_breakpoints ();
3435 printf_unfiltered (_("Overlay debugging enabled."));
3438 /* Function: overlay_off_command
3439 A utility command to turn on overlay debugging.
3440 Possibly this should be done via a set/show command. */
3443 overlay_off_command (char *args
, int from_tty
)
3445 overlay_debugging
= ovly_off
;
3446 disable_overlay_breakpoints ();
3448 printf_unfiltered (_("Overlay debugging disabled."));
3452 overlay_load_command (char *args
, int from_tty
)
3454 struct gdbarch
*gdbarch
= get_current_arch ();
3456 if (gdbarch_overlay_update_p (gdbarch
))
3457 gdbarch_overlay_update (gdbarch
, NULL
);
3459 error (_("This target does not know how to read its overlay state."));
3462 /* Function: overlay_command
3463 A place-holder for a mis-typed command. */
3465 /* Command list chain containing all defined "overlay" subcommands. */
3466 static struct cmd_list_element
*overlaylist
;
3469 overlay_command (char *args
, int from_tty
)
3472 ("\"overlay\" must be followed by the name of an overlay command.\n");
3473 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3476 /* Target Overlays for the "Simplest" overlay manager:
3478 This is GDB's default target overlay layer. It works with the
3479 minimal overlay manager supplied as an example by Cygnus. The
3480 entry point is via a function pointer "gdbarch_overlay_update",
3481 so targets that use a different runtime overlay manager can
3482 substitute their own overlay_update function and take over the
3485 The overlay_update function pokes around in the target's data structures
3486 to see what overlays are mapped, and updates GDB's overlay mapping with
3489 In this simple implementation, the target data structures are as follows:
3490 unsigned _novlys; /# number of overlay sections #/
3491 unsigned _ovly_table[_novlys][4] = {
3492 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3493 {..., ..., ..., ...},
3495 unsigned _novly_regions; /# number of overlay regions #/
3496 unsigned _ovly_region_table[_novly_regions][3] = {
3497 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3500 These functions will attempt to update GDB's mappedness state in the
3501 symbol section table, based on the target's mappedness state.
3503 To do this, we keep a cached copy of the target's _ovly_table, and
3504 attempt to detect when the cached copy is invalidated. The main
3505 entry point is "simple_overlay_update(SECT), which looks up SECT in
3506 the cached table and re-reads only the entry for that section from
3507 the target (whenever possible). */
3509 /* Cached, dynamically allocated copies of the target data structures: */
3510 static unsigned (*cache_ovly_table
)[4] = 0;
3511 static unsigned cache_novlys
= 0;
3512 static CORE_ADDR cache_ovly_table_base
= 0;
3515 VMA
, OSIZE
, LMA
, MAPPED
3518 /* Throw away the cached copy of _ovly_table. */
3521 simple_free_overlay_table (void)
3523 if (cache_ovly_table
)
3524 xfree (cache_ovly_table
);
3526 cache_ovly_table
= NULL
;
3527 cache_ovly_table_base
= 0;
3530 /* Read an array of ints of size SIZE from the target into a local buffer.
3531 Convert to host order. int LEN is number of ints. */
3534 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3535 int len
, int size
, enum bfd_endian byte_order
)
3537 /* FIXME (alloca): Not safe if array is very large. */
3538 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3541 read_memory (memaddr
, buf
, len
* size
);
3542 for (i
= 0; i
< len
; i
++)
3543 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3546 /* Find and grab a copy of the target _ovly_table
3547 (and _novlys, which is needed for the table's size). */
3550 simple_read_overlay_table (void)
3552 struct bound_minimal_symbol novlys_msym
;
3553 struct bound_minimal_symbol ovly_table_msym
;
3554 struct gdbarch
*gdbarch
;
3556 enum bfd_endian byte_order
;
3558 simple_free_overlay_table ();
3559 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3560 if (! novlys_msym
.minsym
)
3562 error (_("Error reading inferior's overlay table: "
3563 "couldn't find `_novlys' variable\n"
3564 "in inferior. Use `overlay manual' mode."));
3568 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3569 if (! ovly_table_msym
.minsym
)
3571 error (_("Error reading inferior's overlay table: couldn't find "
3572 "`_ovly_table' array\n"
3573 "in inferior. Use `overlay manual' mode."));
3577 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3578 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3579 byte_order
= gdbarch_byte_order (gdbarch
);
3581 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3584 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3585 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3586 read_target_long_array (cache_ovly_table_base
,
3587 (unsigned int *) cache_ovly_table
,
3588 cache_novlys
* 4, word_size
, byte_order
);
3590 return 1; /* SUCCESS */
3593 /* Function: simple_overlay_update_1
3594 A helper function for simple_overlay_update. Assuming a cached copy
3595 of _ovly_table exists, look through it to find an entry whose vma,
3596 lma and size match those of OSECT. Re-read the entry and make sure
3597 it still matches OSECT (else the table may no longer be valid).
3598 Set OSECT's mapped state to match the entry. Return: 1 for
3599 success, 0 for failure. */
3602 simple_overlay_update_1 (struct obj_section
*osect
)
3605 bfd
*obfd
= osect
->objfile
->obfd
;
3606 asection
*bsect
= osect
->the_bfd_section
;
3607 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3608 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3609 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3611 for (i
= 0; i
< cache_novlys
; i
++)
3612 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3613 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3615 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3616 (unsigned int *) cache_ovly_table
[i
],
3617 4, word_size
, byte_order
);
3618 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3619 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3621 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3624 else /* Warning! Warning! Target's ovly table has changed! */
3630 /* Function: simple_overlay_update
3631 If OSECT is NULL, then update all sections' mapped state
3632 (after re-reading the entire target _ovly_table).
3633 If OSECT is non-NULL, then try to find a matching entry in the
3634 cached ovly_table and update only OSECT's mapped state.
3635 If a cached entry can't be found or the cache isn't valid, then
3636 re-read the entire cache, and go ahead and update all sections. */
3639 simple_overlay_update (struct obj_section
*osect
)
3641 struct objfile
*objfile
;
3643 /* Were we given an osect to look up? NULL means do all of them. */
3645 /* Have we got a cached copy of the target's overlay table? */
3646 if (cache_ovly_table
!= NULL
)
3648 /* Does its cached location match what's currently in the
3650 struct bound_minimal_symbol minsym
3651 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3653 if (minsym
.minsym
== NULL
)
3654 error (_("Error reading inferior's overlay table: couldn't "
3655 "find `_ovly_table' array\n"
3656 "in inferior. Use `overlay manual' mode."));
3658 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3659 /* Then go ahead and try to look up this single section in
3661 if (simple_overlay_update_1 (osect
))
3662 /* Found it! We're done. */
3666 /* Cached table no good: need to read the entire table anew.
3667 Or else we want all the sections, in which case it's actually
3668 more efficient to read the whole table in one block anyway. */
3670 if (! simple_read_overlay_table ())
3673 /* Now may as well update all sections, even if only one was requested. */
3674 ALL_OBJSECTIONS (objfile
, osect
)
3675 if (section_is_overlay (osect
))
3678 bfd
*obfd
= osect
->objfile
->obfd
;
3679 asection
*bsect
= osect
->the_bfd_section
;
3681 for (i
= 0; i
< cache_novlys
; i
++)
3682 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3683 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3684 { /* obj_section matches i'th entry in ovly_table. */
3685 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3686 break; /* finished with inner for loop: break out. */
3691 /* Set the output sections and output offsets for section SECTP in
3692 ABFD. The relocation code in BFD will read these offsets, so we
3693 need to be sure they're initialized. We map each section to itself,
3694 with no offset; this means that SECTP->vma will be honored. */
3697 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3699 sectp
->output_section
= sectp
;
3700 sectp
->output_offset
= 0;
3703 /* Default implementation for sym_relocate. */
3706 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3709 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3711 bfd
*abfd
= sectp
->owner
;
3713 /* We're only interested in sections with relocation
3715 if ((sectp
->flags
& SEC_RELOC
) == 0)
3718 /* We will handle section offsets properly elsewhere, so relocate as if
3719 all sections begin at 0. */
3720 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3722 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3725 /* Relocate the contents of a debug section SECTP in ABFD. The
3726 contents are stored in BUF if it is non-NULL, or returned in a
3727 malloc'd buffer otherwise.
3729 For some platforms and debug info formats, shared libraries contain
3730 relocations against the debug sections (particularly for DWARF-2;
3731 one affected platform is PowerPC GNU/Linux, although it depends on
3732 the version of the linker in use). Also, ELF object files naturally
3733 have unresolved relocations for their debug sections. We need to apply
3734 the relocations in order to get the locations of symbols correct.
3735 Another example that may require relocation processing, is the
3736 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3740 symfile_relocate_debug_section (struct objfile
*objfile
,
3741 asection
*sectp
, bfd_byte
*buf
)
3743 gdb_assert (objfile
->sf
->sym_relocate
);
3745 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3748 struct symfile_segment_data
*
3749 get_symfile_segment_data (bfd
*abfd
)
3751 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3756 return sf
->sym_segments (abfd
);
3760 free_symfile_segment_data (struct symfile_segment_data
*data
)
3762 xfree (data
->segment_bases
);
3763 xfree (data
->segment_sizes
);
3764 xfree (data
->segment_info
);
3769 - DATA, containing segment addresses from the object file ABFD, and
3770 the mapping from ABFD's sections onto the segments that own them,
3772 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3773 segment addresses reported by the target,
3774 store the appropriate offsets for each section in OFFSETS.
3776 If there are fewer entries in SEGMENT_BASES than there are segments
3777 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3779 If there are more entries, then ignore the extra. The target may
3780 not be able to distinguish between an empty data segment and a
3781 missing data segment; a missing text segment is less plausible. */
3784 symfile_map_offsets_to_segments (bfd
*abfd
,
3785 const struct symfile_segment_data
*data
,
3786 struct section_offsets
*offsets
,
3787 int num_segment_bases
,
3788 const CORE_ADDR
*segment_bases
)
3793 /* It doesn't make sense to call this function unless you have some
3794 segment base addresses. */
3795 gdb_assert (num_segment_bases
> 0);
3797 /* If we do not have segment mappings for the object file, we
3798 can not relocate it by segments. */
3799 gdb_assert (data
!= NULL
);
3800 gdb_assert (data
->num_segments
> 0);
3802 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3804 int which
= data
->segment_info
[i
];
3806 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3808 /* Don't bother computing offsets for sections that aren't
3809 loaded as part of any segment. */
3813 /* Use the last SEGMENT_BASES entry as the address of any extra
3814 segments mentioned in DATA->segment_info. */
3815 if (which
> num_segment_bases
)
3816 which
= num_segment_bases
;
3818 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3819 - data
->segment_bases
[which
- 1]);
3826 symfile_find_segment_sections (struct objfile
*objfile
)
3828 bfd
*abfd
= objfile
->obfd
;
3831 struct symfile_segment_data
*data
;
3833 data
= get_symfile_segment_data (objfile
->obfd
);
3837 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3839 free_symfile_segment_data (data
);
3843 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3845 int which
= data
->segment_info
[i
];
3849 if (objfile
->sect_index_text
== -1)
3850 objfile
->sect_index_text
= sect
->index
;
3852 if (objfile
->sect_index_rodata
== -1)
3853 objfile
->sect_index_rodata
= sect
->index
;
3855 else if (which
== 2)
3857 if (objfile
->sect_index_data
== -1)
3858 objfile
->sect_index_data
= sect
->index
;
3860 if (objfile
->sect_index_bss
== -1)
3861 objfile
->sect_index_bss
= sect
->index
;
3865 free_symfile_segment_data (data
);
3868 /* Listen for free_objfile events. */
3871 symfile_free_objfile (struct objfile
*objfile
)
3873 /* Remove the target sections owned by this objfile. */
3874 if (objfile
!= NULL
)
3875 remove_target_sections ((void *) objfile
);
3878 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3879 Expand all symtabs that match the specified criteria.
3880 See quick_symbol_functions.expand_symtabs_matching for details. */
3883 expand_symtabs_matching (expand_symtabs_file_matcher_ftype
*file_matcher
,
3884 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3885 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3886 enum search_domain kind
,
3889 struct objfile
*objfile
;
3891 ALL_OBJFILES (objfile
)
3894 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3896 expansion_notify
, kind
,
3901 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3902 Map function FUN over every file.
3903 See quick_symbol_functions.map_symbol_filenames for details. */
3906 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3909 struct objfile
*objfile
;
3911 ALL_OBJFILES (objfile
)
3914 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3920 _initialize_symfile (void)
3922 struct cmd_list_element
*c
;
3924 observer_attach_free_objfile (symfile_free_objfile
);
3926 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3927 Load symbol table from executable file FILE.\n\
3928 The `file' command can also load symbol tables, as well as setting the file\n\
3929 to execute."), &cmdlist
);
3930 set_cmd_completer (c
, filename_completer
);
3932 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3933 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3934 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3935 ...]\nADDR is the starting address of the file's text.\n\
3936 The optional arguments are section-name section-address pairs and\n\
3937 should be specified if the data and bss segments are not contiguous\n\
3938 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3940 set_cmd_completer (c
, filename_completer
);
3942 c
= add_cmd ("remove-symbol-file", class_files
,
3943 remove_symbol_file_command
, _("\
3944 Remove a symbol file added via the add-symbol-file command.\n\
3945 Usage: remove-symbol-file FILENAME\n\
3946 remove-symbol-file -a ADDRESS\n\
3947 The file to remove can be identified by its filename or by an address\n\
3948 that lies within the boundaries of this symbol file in memory."),
3951 c
= add_cmd ("load", class_files
, load_command
, _("\
3952 Dynamically load FILE into the running program, and record its symbols\n\
3953 for access from GDB.\n\
3954 A load OFFSET may also be given."), &cmdlist
);
3955 set_cmd_completer (c
, filename_completer
);
3957 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3958 _("Commands for debugging overlays."), &overlaylist
,
3959 "overlay ", 0, &cmdlist
);
3961 add_com_alias ("ovly", "overlay", class_alias
, 1);
3962 add_com_alias ("ov", "overlay", class_alias
, 1);
3964 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3965 _("Assert that an overlay section is mapped."), &overlaylist
);
3967 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3968 _("Assert that an overlay section is unmapped."), &overlaylist
);
3970 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3971 _("List mappings of overlay sections."), &overlaylist
);
3973 add_cmd ("manual", class_support
, overlay_manual_command
,
3974 _("Enable overlay debugging."), &overlaylist
);
3975 add_cmd ("off", class_support
, overlay_off_command
,
3976 _("Disable overlay debugging."), &overlaylist
);
3977 add_cmd ("auto", class_support
, overlay_auto_command
,
3978 _("Enable automatic overlay debugging."), &overlaylist
);
3979 add_cmd ("load-target", class_support
, overlay_load_command
,
3980 _("Read the overlay mapping state from the target."), &overlaylist
);
3982 /* Filename extension to source language lookup table: */
3983 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3985 Set mapping between filename extension and source language."), _("\
3986 Show mapping between filename extension and source language."), _("\
3987 Usage: set extension-language .foo bar"),
3988 set_ext_lang_command
,
3990 &setlist
, &showlist
);
3992 add_info ("extensions", info_ext_lang_command
,
3993 _("All filename extensions associated with a source language."));
3995 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3996 &debug_file_directory
, _("\
3997 Set the directories where separate debug symbols are searched for."), _("\
3998 Show the directories where separate debug symbols are searched for."), _("\
3999 Separate debug symbols are first searched for in the same\n\
4000 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
4001 and lastly at the path of the directory of the binary with\n\
4002 each global debug-file-directory component prepended."),
4004 show_debug_file_directory
,
4005 &setlist
, &showlist
);
4007 add_setshow_enum_cmd ("symbol-loading", no_class
,
4008 print_symbol_loading_enums
, &print_symbol_loading
,
4010 Set printing of symbol loading messages."), _("\
4011 Show printing of symbol loading messages."), _("\
4012 off == turn all messages off\n\
4013 brief == print messages for the executable,\n\
4014 and brief messages for shared libraries\n\
4015 full == print messages for the executable,\n\
4016 and messages for each shared library."),
4019 &setprintlist
, &showprintlist
);