1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2017 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 overlay_invalidate_all (void);
96 static void overlay_auto_command (char *, int);
98 static void overlay_manual_command (char *, int);
100 static void overlay_off_command (char *, int);
102 static void overlay_load_command (char *, int);
104 static void overlay_command (char *, int);
106 static void simple_free_overlay_table (void);
108 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
111 static int simple_read_overlay_table (void);
113 static int simple_overlay_update_1 (struct obj_section
*);
115 static void info_ext_lang_command (char *args
, int from_tty
);
117 static void symfile_find_segment_sections (struct objfile
*objfile
);
119 void _initialize_symfile (void);
121 /* List of all available sym_fns. On gdb startup, each object file reader
122 calls add_symtab_fns() to register information on each format it is
127 /* BFD flavour that we handle. */
128 enum bfd_flavour sym_flavour
;
130 /* The "vtable" of symbol functions. */
131 const struct sym_fns
*sym_fns
;
132 } registered_sym_fns
;
134 DEF_VEC_O (registered_sym_fns
);
136 static VEC (registered_sym_fns
) *symtab_fns
= NULL
;
138 /* Values for "set print symbol-loading". */
140 const char print_symbol_loading_off
[] = "off";
141 const char print_symbol_loading_brief
[] = "brief";
142 const char print_symbol_loading_full
[] = "full";
143 static const char *print_symbol_loading_enums
[] =
145 print_symbol_loading_off
,
146 print_symbol_loading_brief
,
147 print_symbol_loading_full
,
150 static const char *print_symbol_loading
= print_symbol_loading_full
;
152 /* If non-zero, shared library symbols will be added automatically
153 when the inferior is created, new libraries are loaded, or when
154 attaching to the inferior. This is almost always what users will
155 want to have happen; but for very large programs, the startup time
156 will be excessive, and so if this is a problem, the user can clear
157 this flag and then add the shared library symbols as needed. Note
158 that there is a potential for confusion, since if the shared
159 library symbols are not loaded, commands like "info fun" will *not*
160 report all the functions that are actually present. */
162 int auto_solib_add
= 1;
165 /* Return non-zero if symbol-loading messages should be printed.
166 FROM_TTY is the standard from_tty argument to gdb commands.
167 If EXEC is non-zero the messages are for the executable.
168 Otherwise, messages are for shared libraries.
169 If FULL is non-zero then the caller is printing a detailed message.
170 E.g., the message includes the shared library name.
171 Otherwise, the caller is printing a brief "summary" message. */
174 print_symbol_loading_p (int from_tty
, int exec
, int full
)
176 if (!from_tty
&& !info_verbose
)
181 /* We don't check FULL for executables, there are few such
182 messages, therefore brief == full. */
183 return print_symbol_loading
!= print_symbol_loading_off
;
186 return print_symbol_loading
== print_symbol_loading_full
;
187 return print_symbol_loading
== print_symbol_loading_brief
;
190 /* True if we are reading a symbol table. */
192 int currently_reading_symtab
= 0;
194 /* Increment currently_reading_symtab and return a cleanup that can be
195 used to decrement it. */
197 scoped_restore_tmpl
<int>
198 increment_reading_symtab (void)
200 gdb_assert (currently_reading_symtab
>= 0);
201 return make_scoped_restore (¤tly_reading_symtab
,
202 currently_reading_symtab
+ 1);
205 /* Remember the lowest-addressed loadable section we've seen.
206 This function is called via bfd_map_over_sections.
208 In case of equal vmas, the section with the largest size becomes the
209 lowest-addressed loadable section.
211 If the vmas and sizes are equal, the last section is considered the
212 lowest-addressed loadable section. */
215 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
217 asection
**lowest
= (asection
**) obj
;
219 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
222 *lowest
= sect
; /* First loadable section */
223 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
224 *lowest
= sect
; /* A lower loadable section */
225 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
226 && (bfd_section_size (abfd
, (*lowest
))
227 <= bfd_section_size (abfd
, sect
)))
231 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
232 new object's 'num_sections' field is set to 0; it must be updated
235 struct section_addr_info
*
236 alloc_section_addr_info (size_t num_sections
)
238 struct section_addr_info
*sap
;
241 size
= (sizeof (struct section_addr_info
)
242 + sizeof (struct other_sections
) * (num_sections
- 1));
243 sap
= (struct section_addr_info
*) xmalloc (size
);
244 memset (sap
, 0, size
);
249 /* Build (allocate and populate) a section_addr_info struct from
250 an existing section table. */
252 extern struct section_addr_info
*
253 build_section_addr_info_from_section_table (const struct target_section
*start
,
254 const struct target_section
*end
)
256 struct section_addr_info
*sap
;
257 const struct target_section
*stp
;
260 sap
= alloc_section_addr_info (end
- start
);
262 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
264 struct bfd_section
*asect
= stp
->the_bfd_section
;
265 bfd
*abfd
= asect
->owner
;
267 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
268 && oidx
< end
- start
)
270 sap
->other
[oidx
].addr
= stp
->addr
;
271 sap
->other
[oidx
].name
= xstrdup (bfd_section_name (abfd
, asect
));
272 sap
->other
[oidx
].sectindex
= gdb_bfd_section_index (abfd
, asect
);
277 sap
->num_sections
= oidx
;
282 /* Create a section_addr_info from section offsets in ABFD. */
284 static struct section_addr_info
*
285 build_section_addr_info_from_bfd (bfd
*abfd
)
287 struct section_addr_info
*sap
;
289 struct bfd_section
*sec
;
291 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
292 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
293 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
295 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
296 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
297 sap
->other
[i
].sectindex
= gdb_bfd_section_index (abfd
, sec
);
301 sap
->num_sections
= i
;
306 /* Create a section_addr_info from section offsets in OBJFILE. */
308 struct section_addr_info
*
309 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
311 struct section_addr_info
*sap
;
314 /* Before reread_symbols gets rewritten it is not safe to call:
315 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
317 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
318 for (i
= 0; i
< sap
->num_sections
; i
++)
320 int sectindex
= sap
->other
[i
].sectindex
;
322 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
327 /* Free all memory allocated by build_section_addr_info_from_section_table. */
330 free_section_addr_info (struct section_addr_info
*sap
)
334 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
335 xfree (sap
->other
[idx
].name
);
339 /* Initialize OBJFILE's sect_index_* members. */
342 init_objfile_sect_indices (struct objfile
*objfile
)
347 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
349 objfile
->sect_index_text
= sect
->index
;
351 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
353 objfile
->sect_index_data
= sect
->index
;
355 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
357 objfile
->sect_index_bss
= sect
->index
;
359 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
361 objfile
->sect_index_rodata
= sect
->index
;
363 /* This is where things get really weird... We MUST have valid
364 indices for the various sect_index_* members or gdb will abort.
365 So if for example, there is no ".text" section, we have to
366 accomodate that. First, check for a file with the standard
367 one or two segments. */
369 symfile_find_segment_sections (objfile
);
371 /* Except when explicitly adding symbol files at some address,
372 section_offsets contains nothing but zeros, so it doesn't matter
373 which slot in section_offsets the individual sect_index_* members
374 index into. So if they are all zero, it is safe to just point
375 all the currently uninitialized indices to the first slot. But
376 beware: if this is the main executable, it may be relocated
377 later, e.g. by the remote qOffsets packet, and then this will
378 be wrong! That's why we try segments first. */
380 for (i
= 0; i
< objfile
->num_sections
; i
++)
382 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
387 if (i
== objfile
->num_sections
)
389 if (objfile
->sect_index_text
== -1)
390 objfile
->sect_index_text
= 0;
391 if (objfile
->sect_index_data
== -1)
392 objfile
->sect_index_data
= 0;
393 if (objfile
->sect_index_bss
== -1)
394 objfile
->sect_index_bss
= 0;
395 if (objfile
->sect_index_rodata
== -1)
396 objfile
->sect_index_rodata
= 0;
400 /* The arguments to place_section. */
402 struct place_section_arg
404 struct section_offsets
*offsets
;
408 /* Find a unique offset to use for loadable section SECT if
409 the user did not provide an offset. */
412 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
414 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
415 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
417 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
419 /* We are only interested in allocated sections. */
420 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
423 /* If the user specified an offset, honor it. */
424 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
427 /* Otherwise, let's try to find a place for the section. */
428 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
435 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
437 int indx
= cur_sec
->index
;
439 /* We don't need to compare against ourself. */
443 /* We can only conflict with allocated sections. */
444 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
447 /* If the section offset is 0, either the section has not been placed
448 yet, or it was the lowest section placed (in which case LOWEST
449 will be past its end). */
450 if (offsets
[indx
] == 0)
453 /* If this section would overlap us, then we must move up. */
454 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
455 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
457 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
458 start_addr
= (start_addr
+ align
- 1) & -align
;
463 /* Otherwise, we appear to be OK. So far. */
468 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
469 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
472 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
473 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
477 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
479 const struct section_addr_info
*addrs
)
483 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
485 /* Now calculate offsets for section that were specified by the caller. */
486 for (i
= 0; i
< addrs
->num_sections
; i
++)
488 const struct other_sections
*osp
;
490 osp
= &addrs
->other
[i
];
491 if (osp
->sectindex
== -1)
494 /* Record all sections in offsets. */
495 /* The section_offsets in the objfile are here filled in using
497 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
501 /* Transform section name S for a name comparison. prelink can split section
502 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
503 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
504 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
505 (`.sbss') section has invalid (increased) virtual address. */
508 addr_section_name (const char *s
)
510 if (strcmp (s
, ".dynbss") == 0)
512 if (strcmp (s
, ".sdynbss") == 0)
518 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
519 their (name, sectindex) pair. sectindex makes the sort by name stable. */
522 addrs_section_compar (const void *ap
, const void *bp
)
524 const struct other_sections
*a
= *((struct other_sections
**) ap
);
525 const struct other_sections
*b
= *((struct other_sections
**) bp
);
528 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
532 return a
->sectindex
- b
->sectindex
;
535 /* Provide sorted array of pointers to sections of ADDRS. The array is
536 terminated by NULL. Caller is responsible to call xfree for it. */
538 static struct other_sections
**
539 addrs_section_sort (struct section_addr_info
*addrs
)
541 struct other_sections
**array
;
544 /* `+ 1' for the NULL terminator. */
545 array
= XNEWVEC (struct other_sections
*, addrs
->num_sections
+ 1);
546 for (i
= 0; i
< addrs
->num_sections
; i
++)
547 array
[i
] = &addrs
->other
[i
];
550 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
555 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
556 also SECTINDEXes specific to ABFD there. This function can be used to
557 rebase ADDRS to start referencing different BFD than before. */
560 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
562 asection
*lower_sect
;
563 CORE_ADDR lower_offset
;
565 struct cleanup
*my_cleanup
;
566 struct section_addr_info
*abfd_addrs
;
567 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
568 struct other_sections
**addrs_to_abfd_addrs
;
570 /* Find lowest loadable section to be used as starting point for
571 continguous sections. */
573 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
574 if (lower_sect
== NULL
)
576 warning (_("no loadable sections found in added symbol-file %s"),
577 bfd_get_filename (abfd
));
581 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
583 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
584 in ABFD. Section names are not unique - there can be multiple sections of
585 the same name. Also the sections of the same name do not have to be
586 adjacent to each other. Some sections may be present only in one of the
587 files. Even sections present in both files do not have to be in the same
590 Use stable sort by name for the sections in both files. Then linearly
591 scan both lists matching as most of the entries as possible. */
593 addrs_sorted
= addrs_section_sort (addrs
);
594 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
596 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
597 make_cleanup_free_section_addr_info (abfd_addrs
);
598 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
599 make_cleanup (xfree
, abfd_addrs_sorted
);
601 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
602 ABFD_ADDRS_SORTED. */
604 addrs_to_abfd_addrs
= XCNEWVEC (struct other_sections
*, addrs
->num_sections
);
605 make_cleanup (xfree
, addrs_to_abfd_addrs
);
607 while (*addrs_sorted
)
609 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
611 while (*abfd_addrs_sorted
612 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
616 if (*abfd_addrs_sorted
617 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
622 /* Make the found item directly addressable from ADDRS. */
623 index_in_addrs
= *addrs_sorted
- addrs
->other
;
624 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
625 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
627 /* Never use the same ABFD entry twice. */
634 /* Calculate offsets for the loadable sections.
635 FIXME! Sections must be in order of increasing loadable section
636 so that contiguous sections can use the lower-offset!!!
638 Adjust offsets if the segments are not contiguous.
639 If the section is contiguous, its offset should be set to
640 the offset of the highest loadable section lower than it
641 (the loadable section directly below it in memory).
642 this_offset = lower_offset = lower_addr - lower_orig_addr */
644 for (i
= 0; i
< addrs
->num_sections
; i
++)
646 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
650 /* This is the index used by BFD. */
651 addrs
->other
[i
].sectindex
= sect
->sectindex
;
653 if (addrs
->other
[i
].addr
!= 0)
655 addrs
->other
[i
].addr
-= sect
->addr
;
656 lower_offset
= addrs
->other
[i
].addr
;
659 addrs
->other
[i
].addr
= lower_offset
;
663 /* addr_section_name transformation is not used for SECT_NAME. */
664 const char *sect_name
= addrs
->other
[i
].name
;
666 /* This section does not exist in ABFD, which is normally
667 unexpected and we want to issue a warning.
669 However, the ELF prelinker does create a few sections which are
670 marked in the main executable as loadable (they are loaded in
671 memory from the DYNAMIC segment) and yet are not present in
672 separate debug info files. This is fine, and should not cause
673 a warning. Shared libraries contain just the section
674 ".gnu.liblist" but it is not marked as loadable there. There is
675 no other way to identify them than by their name as the sections
676 created by prelink have no special flags.
678 For the sections `.bss' and `.sbss' see addr_section_name. */
680 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
681 || strcmp (sect_name
, ".gnu.conflict") == 0
682 || (strcmp (sect_name
, ".bss") == 0
684 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
685 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
686 || (strcmp (sect_name
, ".sbss") == 0
688 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
689 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
690 warning (_("section %s not found in %s"), sect_name
,
691 bfd_get_filename (abfd
));
693 addrs
->other
[i
].addr
= 0;
694 addrs
->other
[i
].sectindex
= -1;
698 do_cleanups (my_cleanup
);
701 /* Parse the user's idea of an offset for dynamic linking, into our idea
702 of how to represent it for fast symbol reading. This is the default
703 version of the sym_fns.sym_offsets function for symbol readers that
704 don't need to do anything special. It allocates a section_offsets table
705 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
708 default_symfile_offsets (struct objfile
*objfile
,
709 const struct section_addr_info
*addrs
)
711 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
712 objfile
->section_offsets
= (struct section_offsets
*)
713 obstack_alloc (&objfile
->objfile_obstack
,
714 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
715 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
716 objfile
->num_sections
, addrs
);
718 /* For relocatable files, all loadable sections will start at zero.
719 The zero is meaningless, so try to pick arbitrary addresses such
720 that no loadable sections overlap. This algorithm is quadratic,
721 but the number of sections in a single object file is generally
723 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
725 struct place_section_arg arg
;
726 bfd
*abfd
= objfile
->obfd
;
729 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
730 /* We do not expect this to happen; just skip this step if the
731 relocatable file has a section with an assigned VMA. */
732 if (bfd_section_vma (abfd
, cur_sec
) != 0)
737 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
739 /* Pick non-overlapping offsets for sections the user did not
741 arg
.offsets
= objfile
->section_offsets
;
743 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
745 /* Correctly filling in the section offsets is not quite
746 enough. Relocatable files have two properties that
747 (most) shared objects do not:
749 - Their debug information will contain relocations. Some
750 shared libraries do also, but many do not, so this can not
753 - If there are multiple code sections they will be loaded
754 at different relative addresses in memory than they are
755 in the objfile, since all sections in the file will start
758 Because GDB has very limited ability to map from an
759 address in debug info to the correct code section,
760 it relies on adding SECT_OFF_TEXT to things which might be
761 code. If we clear all the section offsets, and set the
762 section VMAs instead, then symfile_relocate_debug_section
763 will return meaningful debug information pointing at the
766 GDB has too many different data structures for section
767 addresses - a bfd, objfile, and so_list all have section
768 tables, as does exec_ops. Some of these could probably
771 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
772 cur_sec
= cur_sec
->next
)
774 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
777 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
778 exec_set_section_address (bfd_get_filename (abfd
),
780 offsets
[cur_sec
->index
]);
781 offsets
[cur_sec
->index
] = 0;
786 /* Remember the bfd indexes for the .text, .data, .bss and
788 init_objfile_sect_indices (objfile
);
791 /* Divide the file into segments, which are individual relocatable units.
792 This is the default version of the sym_fns.sym_segments function for
793 symbol readers that do not have an explicit representation of segments.
794 It assumes that object files do not have segments, and fully linked
795 files have a single segment. */
797 struct symfile_segment_data
*
798 default_symfile_segments (bfd
*abfd
)
802 struct symfile_segment_data
*data
;
805 /* Relocatable files contain enough information to position each
806 loadable section independently; they should not be relocated
808 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
811 /* Make sure there is at least one loadable section in the file. */
812 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
814 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
822 low
= bfd_get_section_vma (abfd
, sect
);
823 high
= low
+ bfd_get_section_size (sect
);
825 data
= XCNEW (struct symfile_segment_data
);
826 data
->num_segments
= 1;
827 data
->segment_bases
= XCNEW (CORE_ADDR
);
828 data
->segment_sizes
= XCNEW (CORE_ADDR
);
830 num_sections
= bfd_count_sections (abfd
);
831 data
->segment_info
= XCNEWVEC (int, num_sections
);
833 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
837 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
840 vma
= bfd_get_section_vma (abfd
, sect
);
843 if (vma
+ bfd_get_section_size (sect
) > high
)
844 high
= vma
+ bfd_get_section_size (sect
);
846 data
->segment_info
[i
] = 1;
849 data
->segment_bases
[0] = low
;
850 data
->segment_sizes
[0] = high
- low
;
855 /* This is a convenience function to call sym_read for OBJFILE and
856 possibly force the partial symbols to be read. */
859 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
861 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
862 objfile
->per_bfd
->minsyms_read
= true;
864 /* find_separate_debug_file_in_section should be called only if there is
865 single binary with no existing separate debug info file. */
866 if (!objfile_has_partial_symbols (objfile
)
867 && objfile
->separate_debug_objfile
== NULL
868 && objfile
->separate_debug_objfile_backlink
== NULL
)
870 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
874 /* find_separate_debug_file_in_section uses the same filename for the
875 virtual section-as-bfd like the bfd filename containing the
876 section. Therefore use also non-canonical name form for the same
877 file containing the section. */
878 symbol_file_add_separate (abfd
.get (), objfile
->original_name
,
882 if ((add_flags
& SYMFILE_NO_READ
) == 0)
883 require_partial_symbols (objfile
, 0);
886 /* Initialize entry point information for this objfile. */
889 init_entry_point_info (struct objfile
*objfile
)
891 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
897 /* Save startup file's range of PC addresses to help blockframe.c
898 decide where the bottom of the stack is. */
900 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
902 /* Executable file -- record its entry point so we'll recognize
903 the startup file because it contains the entry point. */
904 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
905 ei
->entry_point_p
= 1;
907 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
908 && bfd_get_start_address (objfile
->obfd
) != 0)
910 /* Some shared libraries may have entry points set and be
911 runnable. There's no clear way to indicate this, so just check
912 for values other than zero. */
913 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
914 ei
->entry_point_p
= 1;
918 /* Examination of non-executable.o files. Short-circuit this stuff. */
919 ei
->entry_point_p
= 0;
922 if (ei
->entry_point_p
)
924 struct obj_section
*osect
;
925 CORE_ADDR entry_point
= ei
->entry_point
;
928 /* Make certain that the address points at real code, and not a
929 function descriptor. */
931 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
935 /* Remove any ISA markers, so that this matches entries in the
938 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
941 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
943 struct bfd_section
*sect
= osect
->the_bfd_section
;
945 if (entry_point
>= bfd_get_section_vma (objfile
->obfd
, sect
)
946 && entry_point
< (bfd_get_section_vma (objfile
->obfd
, sect
)
947 + bfd_get_section_size (sect
)))
949 ei
->the_bfd_section_index
950 = gdb_bfd_section_index (objfile
->obfd
, sect
);
957 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
961 /* Process a symbol file, as either the main file or as a dynamically
964 This function does not set the OBJFILE's entry-point info.
966 OBJFILE is where the symbols are to be read from.
968 ADDRS is the list of section load addresses. If the user has given
969 an 'add-symbol-file' command, then this is the list of offsets and
970 addresses he or she provided as arguments to the command; or, if
971 we're handling a shared library, these are the actual addresses the
972 sections are loaded at, according to the inferior's dynamic linker
973 (as gleaned by GDB's shared library code). We convert each address
974 into an offset from the section VMA's as it appears in the object
975 file, and then call the file's sym_offsets function to convert this
976 into a format-specific offset table --- a `struct section_offsets'.
978 ADD_FLAGS encodes verbosity level, whether this is main symbol or
979 an extra symbol file such as dynamically loaded code, and wether
980 breakpoint reset should be deferred. */
983 syms_from_objfile_1 (struct objfile
*objfile
,
984 struct section_addr_info
*addrs
,
985 symfile_add_flags add_flags
)
987 struct section_addr_info
*local_addr
= NULL
;
988 struct cleanup
*old_chain
;
989 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
991 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
993 if (objfile
->sf
== NULL
)
995 /* No symbols to load, but we still need to make sure
996 that the section_offsets table is allocated. */
997 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
998 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
1000 objfile
->num_sections
= num_sections
;
1001 objfile
->section_offsets
1002 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
1004 memset (objfile
->section_offsets
, 0, size
);
1008 /* Make sure that partially constructed symbol tables will be cleaned up
1009 if an error occurs during symbol reading. */
1010 old_chain
= make_cleanup_free_objfile (objfile
);
1012 /* If ADDRS is NULL, put together a dummy address list.
1013 We now establish the convention that an addr of zero means
1014 no load address was specified. */
1017 local_addr
= alloc_section_addr_info (1);
1018 make_cleanup (xfree
, local_addr
);
1024 /* We will modify the main symbol table, make sure that all its users
1025 will be cleaned up if an error occurs during symbol reading. */
1026 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1028 /* Since no error yet, throw away the old symbol table. */
1030 if (symfile_objfile
!= NULL
)
1032 free_objfile (symfile_objfile
);
1033 gdb_assert (symfile_objfile
== NULL
);
1036 /* Currently we keep symbols from the add-symbol-file command.
1037 If the user wants to get rid of them, they should do "symbol-file"
1038 without arguments first. Not sure this is the best behavior
1041 (*objfile
->sf
->sym_new_init
) (objfile
);
1044 /* Convert addr into an offset rather than an absolute address.
1045 We find the lowest address of a loaded segment in the objfile,
1046 and assume that <addr> is where that got loaded.
1048 We no longer warn if the lowest section is not a text segment (as
1049 happens for the PA64 port. */
1050 if (addrs
->num_sections
> 0)
1051 addr_info_make_relative (addrs
, objfile
->obfd
);
1053 /* Initialize symbol reading routines for this objfile, allow complaints to
1054 appear for this new file, and record how verbose to be, then do the
1055 initial symbol reading for this file. */
1057 (*objfile
->sf
->sym_init
) (objfile
);
1058 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1060 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1062 read_symbols (objfile
, add_flags
);
1064 /* Discard cleanups as symbol reading was successful. */
1066 discard_cleanups (old_chain
);
1070 /* Same as syms_from_objfile_1, but also initializes the objfile
1071 entry-point info. */
1074 syms_from_objfile (struct objfile
*objfile
,
1075 struct section_addr_info
*addrs
,
1076 symfile_add_flags add_flags
)
1078 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1079 init_entry_point_info (objfile
);
1082 /* Perform required actions after either reading in the initial
1083 symbols for a new objfile, or mapping in the symbols from a reusable
1084 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1087 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1089 /* If this is the main symbol file we have to clean up all users of the
1090 old main symbol file. Otherwise it is sufficient to fixup all the
1091 breakpoints that may have been redefined by this symbol file. */
1092 if (add_flags
& SYMFILE_MAINLINE
)
1094 /* OK, make it the "real" symbol file. */
1095 symfile_objfile
= objfile
;
1097 clear_symtab_users (add_flags
);
1099 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1101 breakpoint_re_set ();
1104 /* We're done reading the symbol file; finish off complaints. */
1105 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1108 /* Process a symbol file, as either the main file or as a dynamically
1111 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1112 A new reference is acquired by this function.
1114 For NAME description see allocate_objfile's definition.
1116 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1117 extra, such as dynamically loaded code, and what to do with breakpoins.
1119 ADDRS is as described for syms_from_objfile_1, above.
1120 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1122 PARENT is the original objfile if ABFD is a separate debug info file.
1123 Otherwise PARENT is NULL.
1125 Upon success, returns a pointer to the objfile that was added.
1126 Upon failure, jumps back to command level (never returns). */
1128 static struct objfile
*
1129 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1130 symfile_add_flags add_flags
,
1131 struct section_addr_info
*addrs
,
1132 objfile_flags flags
, struct objfile
*parent
)
1134 struct objfile
*objfile
;
1135 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1136 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1137 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1138 && (readnow_symbol_files
1139 || (add_flags
& SYMFILE_NO_READ
) == 0));
1141 if (readnow_symbol_files
)
1143 flags
|= OBJF_READNOW
;
1144 add_flags
&= ~SYMFILE_NO_READ
;
1147 /* Give user a chance to burp if we'd be
1148 interactively wiping out any existing symbols. */
1150 if ((have_full_symbols () || have_partial_symbols ())
1153 && !query (_("Load new symbol table from \"%s\"? "), name
))
1154 error (_("Not confirmed."));
1157 flags
|= OBJF_MAINLINE
;
1158 objfile
= allocate_objfile (abfd
, name
, flags
);
1161 add_separate_debug_objfile (objfile
, parent
);
1163 /* We either created a new mapped symbol table, mapped an existing
1164 symbol table file which has not had initial symbol reading
1165 performed, or need to read an unmapped symbol table. */
1168 if (deprecated_pre_add_symbol_hook
)
1169 deprecated_pre_add_symbol_hook (name
);
1172 printf_unfiltered (_("Reading symbols from %s..."), name
);
1174 gdb_flush (gdb_stdout
);
1177 syms_from_objfile (objfile
, addrs
, add_flags
);
1179 /* We now have at least a partial symbol table. Check to see if the
1180 user requested that all symbols be read on initial access via either
1181 the gdb startup command line or on a per symbol file basis. Expand
1182 all partial symbol tables for this objfile if so. */
1184 if ((flags
& OBJF_READNOW
))
1188 printf_unfiltered (_("expanding to full symbols..."));
1190 gdb_flush (gdb_stdout
);
1194 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1197 if (should_print
&& !objfile_has_symbols (objfile
))
1200 printf_unfiltered (_("(no debugging symbols found)..."));
1206 if (deprecated_post_add_symbol_hook
)
1207 deprecated_post_add_symbol_hook ();
1209 printf_unfiltered (_("done.\n"));
1212 /* We print some messages regardless of whether 'from_tty ||
1213 info_verbose' is true, so make sure they go out at the right
1215 gdb_flush (gdb_stdout
);
1217 if (objfile
->sf
== NULL
)
1219 observer_notify_new_objfile (objfile
);
1220 return objfile
; /* No symbols. */
1223 finish_new_objfile (objfile
, add_flags
);
1225 observer_notify_new_objfile (objfile
);
1227 bfd_cache_close_all ();
1231 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1232 see allocate_objfile's definition. */
1235 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1236 symfile_add_flags symfile_flags
,
1237 struct objfile
*objfile
)
1239 struct section_addr_info
*sap
;
1240 struct cleanup
*my_cleanup
;
1242 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1243 because sections of BFD may not match sections of OBJFILE and because
1244 vma may have been modified by tools such as prelink. */
1245 sap
= build_section_addr_info_from_objfile (objfile
);
1246 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1248 symbol_file_add_with_addrs
1249 (bfd
, name
, symfile_flags
, sap
,
1250 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1254 do_cleanups (my_cleanup
);
1257 /* Process the symbol file ABFD, as either the main file or as a
1258 dynamically loaded file.
1259 See symbol_file_add_with_addrs's comments for details. */
1262 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1263 symfile_add_flags add_flags
,
1264 struct section_addr_info
*addrs
,
1265 objfile_flags flags
, struct objfile
*parent
)
1267 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1271 /* Process a symbol file, as either the main file or as a dynamically
1272 loaded file. See symbol_file_add_with_addrs's comments for details. */
1275 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1276 struct section_addr_info
*addrs
, objfile_flags flags
)
1278 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1280 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1284 /* Call symbol_file_add() with default values and update whatever is
1285 affected by the loading of a new main().
1286 Used when the file is supplied in the gdb command line
1287 and by some targets with special loading requirements.
1288 The auxiliary function, symbol_file_add_main_1(), has the flags
1289 argument for the switches that can only be specified in the symbol_file
1293 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1295 symbol_file_add_main_1 (args
, add_flags
, 0);
1299 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1300 objfile_flags flags
)
1302 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1304 symbol_file_add (args
, add_flags
, NULL
, flags
);
1306 /* Getting new symbols may change our opinion about
1307 what is frameless. */
1308 reinit_frame_cache ();
1310 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1311 set_initial_language ();
1315 symbol_file_clear (int from_tty
)
1317 if ((have_full_symbols () || have_partial_symbols ())
1320 ? !query (_("Discard symbol table from `%s'? "),
1321 objfile_name (symfile_objfile
))
1322 : !query (_("Discard symbol table? "))))
1323 error (_("Not confirmed."));
1325 /* solib descriptors may have handles to objfiles. Wipe them before their
1326 objfiles get stale by free_all_objfiles. */
1327 no_shared_libraries (NULL
, from_tty
);
1329 free_all_objfiles ();
1331 gdb_assert (symfile_objfile
== NULL
);
1333 printf_unfiltered (_("No symbol file now.\n"));
1336 /* See symfile.h. */
1338 int separate_debug_file_debug
= 0;
1341 separate_debug_file_exists (const char *name
, unsigned long crc
,
1342 struct objfile
*parent_objfile
)
1344 unsigned long file_crc
;
1346 struct stat parent_stat
, abfd_stat
;
1347 int verified_as_different
;
1349 /* Find a separate debug info file as if symbols would be present in
1350 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1351 section can contain just the basename of PARENT_OBJFILE without any
1352 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1353 the separate debug infos with the same basename can exist. */
1355 if (filename_cmp (name
, objfile_name (parent_objfile
)) == 0)
1358 if (separate_debug_file_debug
)
1359 printf_unfiltered (_(" Trying %s\n"), name
);
1361 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
, gnutarget
, -1));
1366 /* Verify symlinks were not the cause of filename_cmp name difference above.
1368 Some operating systems, e.g. Windows, do not provide a meaningful
1369 st_ino; they always set it to zero. (Windows does provide a
1370 meaningful st_dev.) Files accessed from gdbservers that do not
1371 support the vFile:fstat packet will also have st_ino set to zero.
1372 Do not indicate a duplicate library in either case. While there
1373 is no guarantee that a system that provides meaningful inode
1374 numbers will never set st_ino to zero, this is merely an
1375 optimization, so we do not need to worry about false negatives. */
1377 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1378 && abfd_stat
.st_ino
!= 0
1379 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1381 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1382 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1384 verified_as_different
= 1;
1387 verified_as_different
= 0;
1389 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1394 if (crc
!= file_crc
)
1396 unsigned long parent_crc
;
1398 /* If the files could not be verified as different with
1399 bfd_stat then we need to calculate the parent's CRC
1400 to verify whether the files are different or not. */
1402 if (!verified_as_different
)
1404 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1408 if (verified_as_different
|| parent_crc
!= file_crc
)
1409 warning (_("the debug information found in \"%s\""
1410 " does not match \"%s\" (CRC mismatch).\n"),
1411 name
, objfile_name (parent_objfile
));
1419 char *debug_file_directory
= NULL
;
1421 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1422 struct cmd_list_element
*c
, const char *value
)
1424 fprintf_filtered (file
,
1425 _("The directory where separate debug "
1426 "symbols are searched for is \"%s\".\n"),
1430 #if ! defined (DEBUG_SUBDIRECTORY)
1431 #define DEBUG_SUBDIRECTORY ".debug"
1434 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1435 where the original file resides (may not be the same as
1436 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1437 looking for. CANON_DIR is the "realpath" form of DIR.
1438 DIR must contain a trailing '/'.
1439 Returns the path of the file with separate debug info, of NULL. */
1442 find_separate_debug_file (const char *dir
,
1443 const char *canon_dir
,
1444 const char *debuglink
,
1445 unsigned long crc32
, struct objfile
*objfile
)
1450 VEC (char_ptr
) *debugdir_vec
;
1451 struct cleanup
*back_to
;
1454 if (separate_debug_file_debug
)
1455 printf_unfiltered (_("\nLooking for separate debug info (debug link) for "
1456 "%s\n"), objfile_name (objfile
));
1458 /* Set I to std::max (strlen (canon_dir), strlen (dir)). */
1460 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1461 i
= strlen (canon_dir
);
1464 = (char *) xmalloc (strlen (debug_file_directory
) + 1
1466 + strlen (DEBUG_SUBDIRECTORY
)
1468 + strlen (debuglink
)
1471 /* First try in the same directory as the original file. */
1472 strcpy (debugfile
, dir
);
1473 strcat (debugfile
, debuglink
);
1475 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1478 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1479 strcpy (debugfile
, dir
);
1480 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1481 strcat (debugfile
, "/");
1482 strcat (debugfile
, debuglink
);
1484 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1487 /* Then try in the global debugfile directories.
1489 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1490 cause "/..." lookups. */
1492 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1493 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1495 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1497 strcpy (debugfile
, debugdir
);
1498 strcat (debugfile
, "/");
1499 strcat (debugfile
, dir
);
1500 strcat (debugfile
, debuglink
);
1502 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1504 do_cleanups (back_to
);
1508 /* If the file is in the sysroot, try using its base path in the
1509 global debugfile directory. */
1510 if (canon_dir
!= NULL
1511 && filename_ncmp (canon_dir
, gdb_sysroot
,
1512 strlen (gdb_sysroot
)) == 0
1513 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1515 strcpy (debugfile
, debugdir
);
1516 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1517 strcat (debugfile
, "/");
1518 strcat (debugfile
, debuglink
);
1520 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1522 do_cleanups (back_to
);
1528 do_cleanups (back_to
);
1533 /* Modify PATH to contain only "[/]directory/" part of PATH.
1534 If there were no directory separators in PATH, PATH will be empty
1535 string on return. */
1538 terminate_after_last_dir_separator (char *path
)
1542 /* Strip off the final filename part, leaving the directory name,
1543 followed by a slash. The directory can be relative or absolute. */
1544 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1545 if (IS_DIR_SEPARATOR (path
[i
]))
1548 /* If I is -1 then no directory is present there and DIR will be "". */
1552 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1553 Returns pathname, or NULL. */
1556 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1559 char *dir
, *canon_dir
;
1561 unsigned long crc32
;
1562 struct cleanup
*cleanups
;
1564 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1566 if (debuglink
== NULL
)
1568 /* There's no separate debug info, hence there's no way we could
1569 load it => no warning. */
1573 cleanups
= make_cleanup (xfree
, debuglink
);
1574 dir
= xstrdup (objfile_name (objfile
));
1575 make_cleanup (xfree
, dir
);
1576 terminate_after_last_dir_separator (dir
);
1577 canon_dir
= lrealpath (dir
);
1579 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1583 if (debugfile
== NULL
)
1585 /* For PR gdb/9538, try again with realpath (if different from the
1590 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1591 && S_ISLNK (st_buf
.st_mode
))
1595 symlink_dir
= lrealpath (objfile_name (objfile
));
1596 if (symlink_dir
!= NULL
)
1598 make_cleanup (xfree
, symlink_dir
);
1599 terminate_after_last_dir_separator (symlink_dir
);
1600 if (strcmp (dir
, symlink_dir
) != 0)
1602 /* Different directory, so try using it. */
1603 debugfile
= find_separate_debug_file (symlink_dir
,
1613 do_cleanups (cleanups
);
1617 /* This is the symbol-file command. Read the file, analyze its
1618 symbols, and add a struct symtab to a symtab list. The syntax of
1619 the command is rather bizarre:
1621 1. The function buildargv implements various quoting conventions
1622 which are undocumented and have little or nothing in common with
1623 the way things are quoted (or not quoted) elsewhere in GDB.
1625 2. Options are used, which are not generally used in GDB (perhaps
1626 "set mapped on", "set readnow on" would be better)
1628 3. The order of options matters, which is contrary to GNU
1629 conventions (because it is confusing and inconvenient). */
1632 symbol_file_command (char *args
, int from_tty
)
1638 symbol_file_clear (from_tty
);
1642 objfile_flags flags
= OBJF_USERLOADED
;
1643 symfile_add_flags add_flags
= 0;
1644 struct cleanup
*cleanups
;
1648 add_flags
|= SYMFILE_VERBOSE
;
1650 gdb_argv
built_argv (args
);
1651 for (char *arg
: built_argv
)
1653 if (strcmp (arg
, "-readnow") == 0)
1654 flags
|= OBJF_READNOW
;
1655 else if (*arg
== '-')
1656 error (_("unknown option `%s'"), arg
);
1659 symbol_file_add_main_1 (arg
, add_flags
, flags
);
1665 error (_("no symbol file name was specified"));
1669 /* Set the initial language.
1671 FIXME: A better solution would be to record the language in the
1672 psymtab when reading partial symbols, and then use it (if known) to
1673 set the language. This would be a win for formats that encode the
1674 language in an easily discoverable place, such as DWARF. For
1675 stabs, we can jump through hoops looking for specially named
1676 symbols or try to intuit the language from the specific type of
1677 stabs we find, but we can't do that until later when we read in
1681 set_initial_language (void)
1683 enum language lang
= main_language ();
1685 if (lang
== language_unknown
)
1687 char *name
= main_name ();
1688 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1691 lang
= SYMBOL_LANGUAGE (sym
);
1694 if (lang
== language_unknown
)
1696 /* Make C the default language */
1700 set_language (lang
);
1701 expected_language
= current_language
; /* Don't warn the user. */
1704 /* Open the file specified by NAME and hand it off to BFD for
1705 preliminary analysis. Return a newly initialized bfd *, which
1706 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1707 absolute). In case of trouble, error() is called. */
1710 symfile_bfd_open (const char *name
)
1713 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
1715 if (!is_target_filename (name
))
1717 char *absolute_name
;
1719 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1721 /* Look down path for it, allocate 2nd new malloc'd copy. */
1722 desc
= openp (getenv ("PATH"),
1723 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1724 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1725 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1728 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1730 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1731 desc
= openp (getenv ("PATH"),
1732 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1733 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1737 perror_with_name (expanded_name
.get ());
1739 make_cleanup (xfree
, absolute_name
);
1740 name
= absolute_name
;
1743 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1744 if (sym_bfd
== NULL
)
1745 error (_("`%s': can't open to read symbols: %s."), name
,
1746 bfd_errmsg (bfd_get_error ()));
1748 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1749 bfd_set_cacheable (sym_bfd
.get (), 1);
1751 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1752 error (_("`%s': can't read symbols: %s."), name
,
1753 bfd_errmsg (bfd_get_error ()));
1755 do_cleanups (back_to
);
1760 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1761 the section was not found. */
1764 get_section_index (struct objfile
*objfile
, const char *section_name
)
1766 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1774 /* Link SF into the global symtab_fns list.
1775 FLAVOUR is the file format that SF handles.
1776 Called on startup by the _initialize routine in each object file format
1777 reader, to register information about each format the reader is prepared
1781 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1783 registered_sym_fns fns
= { flavour
, sf
};
1785 VEC_safe_push (registered_sym_fns
, symtab_fns
, &fns
);
1788 /* Initialize OBJFILE to read symbols from its associated BFD. It
1789 either returns or calls error(). The result is an initialized
1790 struct sym_fns in the objfile structure, that contains cached
1791 information about the symbol file. */
1793 static const struct sym_fns
*
1794 find_sym_fns (bfd
*abfd
)
1796 registered_sym_fns
*rsf
;
1797 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1800 if (our_flavour
== bfd_target_srec_flavour
1801 || our_flavour
== bfd_target_ihex_flavour
1802 || our_flavour
== bfd_target_tekhex_flavour
)
1803 return NULL
; /* No symbols. */
1805 for (i
= 0; VEC_iterate (registered_sym_fns
, symtab_fns
, i
, rsf
); ++i
)
1806 if (our_flavour
== rsf
->sym_flavour
)
1807 return rsf
->sym_fns
;
1809 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1810 bfd_get_target (abfd
));
1814 /* This function runs the load command of our current target. */
1817 load_command (char *arg
, int from_tty
)
1819 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1823 /* The user might be reloading because the binary has changed. Take
1824 this opportunity to check. */
1825 reopen_exec_file ();
1833 parg
= arg
= get_exec_file (1);
1835 /* Count how many \ " ' tab space there are in the name. */
1836 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1844 /* We need to quote this string so buildargv can pull it apart. */
1845 char *temp
= (char *) xmalloc (strlen (arg
) + count
+ 1 );
1849 make_cleanup (xfree
, temp
);
1852 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1854 strncpy (ptemp
, prev
, parg
- prev
);
1855 ptemp
+= parg
- prev
;
1859 strcpy (ptemp
, prev
);
1865 target_load (arg
, from_tty
);
1867 /* After re-loading the executable, we don't really know which
1868 overlays are mapped any more. */
1869 overlay_cache_invalid
= 1;
1871 do_cleanups (cleanup
);
1874 /* This version of "load" should be usable for any target. Currently
1875 it is just used for remote targets, not inftarg.c or core files,
1876 on the theory that only in that case is it useful.
1878 Avoiding xmodem and the like seems like a win (a) because we don't have
1879 to worry about finding it, and (b) On VMS, fork() is very slow and so
1880 we don't want to run a subprocess. On the other hand, I'm not sure how
1881 performance compares. */
1883 static int validate_download
= 0;
1885 /* Callback service function for generic_load (bfd_map_over_sections). */
1888 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1890 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1892 *sum
+= bfd_get_section_size (asec
);
1895 /* Opaque data for load_section_callback. */
1896 struct load_section_data
{
1897 CORE_ADDR load_offset
;
1898 struct load_progress_data
*progress_data
;
1899 VEC(memory_write_request_s
) *requests
;
1902 /* Opaque data for load_progress. */
1903 struct load_progress_data
{
1904 /* Cumulative data. */
1905 unsigned long write_count
;
1906 unsigned long data_count
;
1907 bfd_size_type total_size
;
1910 /* Opaque data for load_progress for a single section. */
1911 struct load_progress_section_data
{
1912 struct load_progress_data
*cumulative
;
1914 /* Per-section data. */
1915 const char *section_name
;
1916 ULONGEST section_sent
;
1917 ULONGEST section_size
;
1922 /* Target write callback routine for progress reporting. */
1925 load_progress (ULONGEST bytes
, void *untyped_arg
)
1927 struct load_progress_section_data
*args
1928 = (struct load_progress_section_data
*) untyped_arg
;
1929 struct load_progress_data
*totals
;
1932 /* Writing padding data. No easy way to get at the cumulative
1933 stats, so just ignore this. */
1936 totals
= args
->cumulative
;
1938 if (bytes
== 0 && args
->section_sent
== 0)
1940 /* The write is just starting. Let the user know we've started
1942 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1944 hex_string (args
->section_size
),
1945 paddress (target_gdbarch (), args
->lma
));
1949 if (validate_download
)
1951 /* Broken memories and broken monitors manifest themselves here
1952 when bring new computers to life. This doubles already slow
1954 /* NOTE: cagney/1999-10-18: A more efficient implementation
1955 might add a verify_memory() method to the target vector and
1956 then use that. remote.c could implement that method using
1957 the ``qCRC'' packet. */
1958 gdb_byte
*check
= (gdb_byte
*) xmalloc (bytes
);
1959 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1961 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1962 error (_("Download verify read failed at %s"),
1963 paddress (target_gdbarch (), args
->lma
));
1964 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1965 error (_("Download verify compare failed at %s"),
1966 paddress (target_gdbarch (), args
->lma
));
1967 do_cleanups (verify_cleanups
);
1969 totals
->data_count
+= bytes
;
1971 args
->buffer
+= bytes
;
1972 totals
->write_count
+= 1;
1973 args
->section_sent
+= bytes
;
1974 if (check_quit_flag ()
1975 || (deprecated_ui_load_progress_hook
!= NULL
1976 && deprecated_ui_load_progress_hook (args
->section_name
,
1977 args
->section_sent
)))
1978 error (_("Canceled the download"));
1980 if (deprecated_show_load_progress
!= NULL
)
1981 deprecated_show_load_progress (args
->section_name
,
1985 totals
->total_size
);
1988 /* Callback service function for generic_load (bfd_map_over_sections). */
1991 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1993 struct memory_write_request
*new_request
;
1994 struct load_section_data
*args
= (struct load_section_data
*) data
;
1995 struct load_progress_section_data
*section_data
;
1996 bfd_size_type size
= bfd_get_section_size (asec
);
1998 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
2000 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
2006 new_request
= VEC_safe_push (memory_write_request_s
,
2007 args
->requests
, NULL
);
2008 memset (new_request
, 0, sizeof (struct memory_write_request
));
2009 section_data
= XCNEW (struct load_progress_section_data
);
2010 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
2011 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
2013 new_request
->data
= (gdb_byte
*) xmalloc (size
);
2014 new_request
->baton
= section_data
;
2016 buffer
= new_request
->data
;
2018 section_data
->cumulative
= args
->progress_data
;
2019 section_data
->section_name
= sect_name
;
2020 section_data
->section_size
= size
;
2021 section_data
->lma
= new_request
->begin
;
2022 section_data
->buffer
= buffer
;
2024 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2027 /* Clean up an entire memory request vector, including load
2028 data and progress records. */
2031 clear_memory_write_data (void *arg
)
2033 VEC(memory_write_request_s
) **vec_p
= (VEC(memory_write_request_s
) **) arg
;
2034 VEC(memory_write_request_s
) *vec
= *vec_p
;
2036 struct memory_write_request
*mr
;
2038 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2043 VEC_free (memory_write_request_s
, vec
);
2046 static void print_transfer_performance (struct ui_file
*stream
,
2047 unsigned long data_count
,
2048 unsigned long write_count
,
2049 std::chrono::steady_clock::duration d
);
2052 generic_load (const char *args
, int from_tty
)
2054 struct cleanup
*old_cleanups
;
2055 struct load_section_data cbdata
;
2056 struct load_progress_data total_progress
;
2057 struct ui_out
*uiout
= current_uiout
;
2061 memset (&cbdata
, 0, sizeof (cbdata
));
2062 memset (&total_progress
, 0, sizeof (total_progress
));
2063 cbdata
.progress_data
= &total_progress
;
2065 old_cleanups
= make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2068 error_no_arg (_("file to load"));
2070 gdb_argv
argv (args
);
2072 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2074 if (argv
[1] != NULL
)
2078 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2080 /* If the last word was not a valid number then
2081 treat it as a file name with spaces in. */
2082 if (argv
[1] == endptr
)
2083 error (_("Invalid download offset:%s."), argv
[1]);
2085 if (argv
[2] != NULL
)
2086 error (_("Too many parameters."));
2089 /* Open the file for loading. */
2090 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
2091 if (loadfile_bfd
== NULL
)
2092 perror_with_name (filename
.get ());
2094 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2096 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2097 bfd_errmsg (bfd_get_error ()));
2100 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
2101 (void *) &total_progress
.total_size
);
2103 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
2105 using namespace std::chrono
;
2107 steady_clock::time_point start_time
= steady_clock::now ();
2109 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2110 load_progress
) != 0)
2111 error (_("Load failed"));
2113 steady_clock::time_point end_time
= steady_clock::now ();
2115 entry
= bfd_get_start_address (loadfile_bfd
.get ());
2116 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2117 uiout
->text ("Start address ");
2118 uiout
->field_fmt ("address", "%s", paddress (target_gdbarch (), entry
));
2119 uiout
->text (", load size ");
2120 uiout
->field_fmt ("load-size", "%lu", total_progress
.data_count
);
2122 regcache_write_pc (get_current_regcache (), entry
);
2124 /* Reset breakpoints, now that we have changed the load image. For
2125 instance, breakpoints may have been set (or reset, by
2126 post_create_inferior) while connected to the target but before we
2127 loaded the program. In that case, the prologue analyzer could
2128 have read instructions from the target to find the right
2129 breakpoint locations. Loading has changed the contents of that
2132 breakpoint_re_set ();
2134 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2135 total_progress
.write_count
,
2136 end_time
- start_time
);
2138 do_cleanups (old_cleanups
);
2141 /* Report on STREAM the performance of a memory transfer operation,
2142 such as 'load'. DATA_COUNT is the number of bytes transferred.
2143 WRITE_COUNT is the number of separate write operations, or 0, if
2144 that information is not available. TIME is how long the operation
2148 print_transfer_performance (struct ui_file
*stream
,
2149 unsigned long data_count
,
2150 unsigned long write_count
,
2151 std::chrono::steady_clock::duration time
)
2153 using namespace std::chrono
;
2154 struct ui_out
*uiout
= current_uiout
;
2156 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2158 uiout
->text ("Transfer rate: ");
2159 if (ms
.count () > 0)
2161 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2163 if (uiout
->is_mi_like_p ())
2165 uiout
->field_fmt ("transfer-rate", "%lu", rate
* 8);
2166 uiout
->text (" bits/sec");
2168 else if (rate
< 1024)
2170 uiout
->field_fmt ("transfer-rate", "%lu", rate
);
2171 uiout
->text (" bytes/sec");
2175 uiout
->field_fmt ("transfer-rate", "%lu", rate
/ 1024);
2176 uiout
->text (" KB/sec");
2181 uiout
->field_fmt ("transferred-bits", "%lu", (data_count
* 8));
2182 uiout
->text (" bits in <1 sec");
2184 if (write_count
> 0)
2187 uiout
->field_fmt ("write-rate", "%lu", data_count
/ write_count
);
2188 uiout
->text (" bytes/write");
2190 uiout
->text (".\n");
2193 /* This function allows the addition of incrementally linked object files.
2194 It does not modify any state in the target, only in the debugger. */
2195 /* Note: ezannoni 2000-04-13 This function/command used to have a
2196 special case syntax for the rombug target (Rombug is the boot
2197 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2198 rombug case, the user doesn't need to supply a text address,
2199 instead a call to target_link() (in target.c) would supply the
2200 value to use. We are now discontinuing this type of ad hoc syntax. */
2203 add_symbol_file_command (char *args
, int from_tty
)
2205 struct gdbarch
*gdbarch
= get_current_arch ();
2206 gdb::unique_xmalloc_ptr
<char> filename
;
2210 int expecting_sec_name
= 0;
2211 int expecting_sec_addr
= 0;
2212 struct objfile
*objf
;
2213 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2214 symfile_add_flags add_flags
= 0;
2217 add_flags
|= SYMFILE_VERBOSE
;
2225 struct section_addr_info
*section_addrs
;
2226 std::vector
<sect_opt
> sect_opts
;
2227 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2232 error (_("add-symbol-file takes a file name and an address"));
2234 gdb_argv
argv (args
);
2236 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2238 /* Process the argument. */
2241 /* The first argument is the file name. */
2242 filename
.reset (tilde_expand (arg
));
2244 else if (argcnt
== 1)
2246 /* The second argument is always the text address at which
2247 to load the program. */
2248 sect_opt sect
= { ".text", arg
};
2249 sect_opts
.push_back (sect
);
2253 /* It's an option (starting with '-') or it's an argument
2255 if (expecting_sec_name
)
2257 sect_opt sect
= { arg
, NULL
};
2258 sect_opts
.push_back (sect
);
2259 expecting_sec_name
= 0;
2261 else if (expecting_sec_addr
)
2263 sect_opts
.back ().value
= arg
;
2264 expecting_sec_addr
= 0;
2266 else if (strcmp (arg
, "-readnow") == 0)
2267 flags
|= OBJF_READNOW
;
2268 else if (strcmp (arg
, "-s") == 0)
2270 expecting_sec_name
= 1;
2271 expecting_sec_addr
= 1;
2274 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2275 " [-readnow] [-s <secname> <addr>]*"));
2279 /* This command takes at least two arguments. The first one is a
2280 filename, and the second is the address where this file has been
2281 loaded. Abort now if this address hasn't been provided by the
2283 if (sect_opts
.empty ())
2284 error (_("The address where %s has been loaded is missing"),
2287 /* Print the prompt for the query below. And save the arguments into
2288 a sect_addr_info structure to be passed around to other
2289 functions. We have to split this up into separate print
2290 statements because hex_string returns a local static
2293 printf_unfiltered (_("add symbol table from file \"%s\" at\n"),
2295 section_addrs
= alloc_section_addr_info (sect_opts
.size ());
2296 make_cleanup (xfree
, section_addrs
);
2297 for (sect_opt
§
: sect_opts
)
2300 const char *val
= sect
.value
;
2301 const char *sec
= sect
.name
;
2303 addr
= parse_and_eval_address (val
);
2305 /* Here we store the section offsets in the order they were
2306 entered on the command line. */
2307 section_addrs
->other
[sec_num
].name
= (char *) sec
;
2308 section_addrs
->other
[sec_num
].addr
= addr
;
2309 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2310 paddress (gdbarch
, addr
));
2313 /* The object's sections are initialized when a
2314 call is made to build_objfile_section_table (objfile).
2315 This happens in reread_symbols.
2316 At this point, we don't know what file type this is,
2317 so we can't determine what section names are valid. */
2319 section_addrs
->num_sections
= sec_num
;
2321 if (from_tty
&& (!query ("%s", "")))
2322 error (_("Not confirmed."));
2324 objf
= symbol_file_add (filename
.get (), add_flags
, section_addrs
, flags
);
2326 add_target_sections_of_objfile (objf
);
2328 /* Getting new symbols may change our opinion about what is
2330 reinit_frame_cache ();
2331 do_cleanups (my_cleanups
);
2335 /* This function removes a symbol file that was added via add-symbol-file. */
2338 remove_symbol_file_command (char *args
, int from_tty
)
2340 struct objfile
*objf
= NULL
;
2341 struct program_space
*pspace
= current_program_space
;
2346 error (_("remove-symbol-file: no symbol file provided"));
2348 gdb_argv
argv (args
);
2350 if (strcmp (argv
[0], "-a") == 0)
2352 /* Interpret the next argument as an address. */
2355 if (argv
[1] == NULL
)
2356 error (_("Missing address argument"));
2358 if (argv
[2] != NULL
)
2359 error (_("Junk after %s"), argv
[1]);
2361 addr
= parse_and_eval_address (argv
[1]);
2365 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2366 && (objf
->flags
& OBJF_SHARED
) != 0
2367 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2371 else if (argv
[0] != NULL
)
2373 /* Interpret the current argument as a file name. */
2375 if (argv
[1] != NULL
)
2376 error (_("Junk after %s"), argv
[0]);
2378 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2382 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2383 && (objf
->flags
& OBJF_SHARED
) != 0
2384 && objf
->pspace
== pspace
2385 && filename_cmp (filename
.get (), objfile_name (objf
)) == 0)
2391 error (_("No symbol file found"));
2394 && !query (_("Remove symbol table from file \"%s\"? "),
2395 objfile_name (objf
)))
2396 error (_("Not confirmed."));
2398 free_objfile (objf
);
2399 clear_symtab_users (0);
2402 /* Re-read symbols if a symbol-file has changed. */
2405 reread_symbols (void)
2407 struct objfile
*objfile
;
2409 struct stat new_statbuf
;
2411 std::vector
<struct objfile
*> new_objfiles
;
2413 /* With the addition of shared libraries, this should be modified,
2414 the load time should be saved in the partial symbol tables, since
2415 different tables may come from different source files. FIXME.
2416 This routine should then walk down each partial symbol table
2417 and see if the symbol table that it originates from has been changed. */
2419 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2421 if (objfile
->obfd
== NULL
)
2424 /* Separate debug objfiles are handled in the main objfile. */
2425 if (objfile
->separate_debug_objfile_backlink
)
2428 /* If this object is from an archive (what you usually create with
2429 `ar', often called a `static library' on most systems, though
2430 a `shared library' on AIX is also an archive), then you should
2431 stat on the archive name, not member name. */
2432 if (objfile
->obfd
->my_archive
)
2433 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2435 res
= stat (objfile_name (objfile
), &new_statbuf
);
2438 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2439 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2440 objfile_name (objfile
));
2443 new_modtime
= new_statbuf
.st_mtime
;
2444 if (new_modtime
!= objfile
->mtime
)
2446 struct cleanup
*old_cleanups
;
2447 struct section_offsets
*offsets
;
2449 char *original_name
;
2451 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2452 objfile_name (objfile
));
2454 /* There are various functions like symbol_file_add,
2455 symfile_bfd_open, syms_from_objfile, etc., which might
2456 appear to do what we want. But they have various other
2457 effects which we *don't* want. So we just do stuff
2458 ourselves. We don't worry about mapped files (for one thing,
2459 any mapped file will be out of date). */
2461 /* If we get an error, blow away this objfile (not sure if
2462 that is the correct response for things like shared
2464 old_cleanups
= make_cleanup_free_objfile (objfile
);
2465 /* We need to do this whenever any symbols go away. */
2466 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2468 if (exec_bfd
!= NULL
2469 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2470 bfd_get_filename (exec_bfd
)) == 0)
2472 /* Reload EXEC_BFD without asking anything. */
2474 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2477 /* Keep the calls order approx. the same as in free_objfile. */
2479 /* Free the separate debug objfiles. It will be
2480 automatically recreated by sym_read. */
2481 free_objfile_separate_debug (objfile
);
2483 /* Remove any references to this objfile in the global
2485 preserve_values (objfile
);
2487 /* Nuke all the state that we will re-read. Much of the following
2488 code which sets things to NULL really is necessary to tell
2489 other parts of GDB that there is nothing currently there.
2491 Try to keep the freeing order compatible with free_objfile. */
2493 if (objfile
->sf
!= NULL
)
2495 (*objfile
->sf
->sym_finish
) (objfile
);
2498 clear_objfile_data (objfile
);
2500 /* Clean up any state BFD has sitting around. */
2502 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2503 char *obfd_filename
;
2505 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2506 /* Open the new BFD before freeing the old one, so that
2507 the filename remains live. */
2508 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2509 objfile
->obfd
= temp
.release ();
2510 if (objfile
->obfd
== NULL
)
2511 error (_("Can't open %s to read symbols."), obfd_filename
);
2514 original_name
= xstrdup (objfile
->original_name
);
2515 make_cleanup (xfree
, original_name
);
2517 /* bfd_openr sets cacheable to true, which is what we want. */
2518 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2519 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2520 bfd_errmsg (bfd_get_error ()));
2522 /* Save the offsets, we will nuke them with the rest of the
2524 num_offsets
= objfile
->num_sections
;
2525 offsets
= ((struct section_offsets
*)
2526 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2527 memcpy (offsets
, objfile
->section_offsets
,
2528 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2530 /* FIXME: Do we have to free a whole linked list, or is this
2532 if (objfile
->global_psymbols
.list
)
2533 xfree (objfile
->global_psymbols
.list
);
2534 memset (&objfile
->global_psymbols
, 0,
2535 sizeof (objfile
->global_psymbols
));
2536 if (objfile
->static_psymbols
.list
)
2537 xfree (objfile
->static_psymbols
.list
);
2538 memset (&objfile
->static_psymbols
, 0,
2539 sizeof (objfile
->static_psymbols
));
2541 /* Free the obstacks for non-reusable objfiles. */
2542 psymbol_bcache_free (objfile
->psymbol_cache
);
2543 objfile
->psymbol_cache
= psymbol_bcache_init ();
2545 /* NB: after this call to obstack_free, objfiles_changed
2546 will need to be called (see discussion below). */
2547 obstack_free (&objfile
->objfile_obstack
, 0);
2548 objfile
->sections
= NULL
;
2549 objfile
->compunit_symtabs
= NULL
;
2550 objfile
->psymtabs
= NULL
;
2551 objfile
->psymtabs_addrmap
= NULL
;
2552 objfile
->free_psymtabs
= NULL
;
2553 objfile
->template_symbols
= NULL
;
2555 /* obstack_init also initializes the obstack so it is
2556 empty. We could use obstack_specify_allocation but
2557 gdb_obstack.h specifies the alloc/dealloc functions. */
2558 obstack_init (&objfile
->objfile_obstack
);
2560 /* set_objfile_per_bfd potentially allocates the per-bfd
2561 data on the objfile's obstack (if sharing data across
2562 multiple users is not possible), so it's important to
2563 do it *after* the obstack has been initialized. */
2564 set_objfile_per_bfd (objfile
);
2566 objfile
->original_name
2567 = (char *) obstack_copy0 (&objfile
->objfile_obstack
, original_name
,
2568 strlen (original_name
));
2570 /* Reset the sym_fns pointer. The ELF reader can change it
2571 based on whether .gdb_index is present, and we need it to
2572 start over. PR symtab/15885 */
2573 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2575 build_objfile_section_table (objfile
);
2576 terminate_minimal_symbol_table (objfile
);
2578 /* We use the same section offsets as from last time. I'm not
2579 sure whether that is always correct for shared libraries. */
2580 objfile
->section_offsets
= (struct section_offsets
*)
2581 obstack_alloc (&objfile
->objfile_obstack
,
2582 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2583 memcpy (objfile
->section_offsets
, offsets
,
2584 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2585 objfile
->num_sections
= num_offsets
;
2587 /* What the hell is sym_new_init for, anyway? The concept of
2588 distinguishing between the main file and additional files
2589 in this way seems rather dubious. */
2590 if (objfile
== symfile_objfile
)
2592 (*objfile
->sf
->sym_new_init
) (objfile
);
2595 (*objfile
->sf
->sym_init
) (objfile
);
2596 clear_complaints (&symfile_complaints
, 1, 1);
2598 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2600 /* We are about to read new symbols and potentially also
2601 DWARF information. Some targets may want to pass addresses
2602 read from DWARF DIE's through an adjustment function before
2603 saving them, like MIPS, which may call into
2604 "find_pc_section". When called, that function will make
2605 use of per-objfile program space data.
2607 Since we discarded our section information above, we have
2608 dangling pointers in the per-objfile program space data
2609 structure. Force GDB to update the section mapping
2610 information by letting it know the objfile has changed,
2611 making the dangling pointers point to correct data
2614 objfiles_changed ();
2616 read_symbols (objfile
, 0);
2618 if (!objfile_has_symbols (objfile
))
2621 printf_unfiltered (_("(no debugging symbols found)\n"));
2625 /* We're done reading the symbol file; finish off complaints. */
2626 clear_complaints (&symfile_complaints
, 0, 1);
2628 /* Getting new symbols may change our opinion about what is
2631 reinit_frame_cache ();
2633 /* Discard cleanups as symbol reading was successful. */
2634 discard_cleanups (old_cleanups
);
2636 /* If the mtime has changed between the time we set new_modtime
2637 and now, we *want* this to be out of date, so don't call stat
2639 objfile
->mtime
= new_modtime
;
2640 init_entry_point_info (objfile
);
2642 new_objfiles
.push_back (objfile
);
2646 if (!new_objfiles
.empty ())
2648 clear_symtab_users (0);
2650 /* clear_objfile_data for each objfile was called before freeing it and
2651 observer_notify_new_objfile (NULL) has been called by
2652 clear_symtab_users above. Notify the new files now. */
2653 for (auto iter
: new_objfiles
)
2654 observer_notify_new_objfile (iter
);
2656 /* At least one objfile has changed, so we can consider that
2657 the executable we're debugging has changed too. */
2658 observer_notify_executable_changed ();
2667 } filename_language
;
2669 DEF_VEC_O (filename_language
);
2671 static VEC (filename_language
) *filename_language_table
;
2673 /* See symfile.h. */
2676 add_filename_language (const char *ext
, enum language lang
)
2678 filename_language entry
;
2680 entry
.ext
= xstrdup (ext
);
2683 VEC_safe_push (filename_language
, filename_language_table
, &entry
);
2686 static char *ext_args
;
2688 show_ext_args (struct ui_file
*file
, int from_tty
,
2689 struct cmd_list_element
*c
, const char *value
)
2691 fprintf_filtered (file
,
2692 _("Mapping between filename extension "
2693 "and source language is \"%s\".\n"),
2698 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2701 char *cp
= ext_args
;
2703 filename_language
*entry
;
2705 /* First arg is filename extension, starting with '.' */
2707 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2709 /* Find end of first arg. */
2710 while (*cp
&& !isspace (*cp
))
2714 error (_("'%s': two arguments required -- "
2715 "filename extension and language"),
2718 /* Null-terminate first arg. */
2721 /* Find beginning of second arg, which should be a source language. */
2722 cp
= skip_spaces (cp
);
2725 error (_("'%s': two arguments required -- "
2726 "filename extension and language"),
2729 /* Lookup the language from among those we know. */
2730 lang
= language_enum (cp
);
2732 /* Now lookup the filename extension: do we already know it? */
2734 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2737 if (0 == strcmp (ext_args
, entry
->ext
))
2743 /* New file extension. */
2744 add_filename_language (ext_args
, lang
);
2748 /* Redefining a previously known filename extension. */
2751 /* query ("Really make files of type %s '%s'?", */
2752 /* ext_args, language_str (lang)); */
2755 entry
->ext
= xstrdup (ext_args
);
2761 info_ext_lang_command (char *args
, int from_tty
)
2764 filename_language
*entry
;
2766 printf_filtered (_("Filename extensions and the languages they represent:"));
2767 printf_filtered ("\n\n");
2769 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2771 printf_filtered ("\t%s\t- %s\n", entry
->ext
, language_str (entry
->lang
));
2775 deduce_language_from_filename (const char *filename
)
2780 if (filename
!= NULL
)
2781 if ((cp
= strrchr (filename
, '.')) != NULL
)
2783 filename_language
*entry
;
2786 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2788 if (strcmp (cp
, entry
->ext
) == 0)
2792 return language_unknown
;
2795 /* Allocate and initialize a new symbol table.
2796 CUST is from the result of allocate_compunit_symtab. */
2799 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2801 struct objfile
*objfile
= cust
->objfile
;
2802 struct symtab
*symtab
2803 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2806 = (const char *) bcache (filename
, strlen (filename
) + 1,
2807 objfile
->per_bfd
->filename_cache
);
2808 symtab
->fullname
= NULL
;
2809 symtab
->language
= deduce_language_from_filename (filename
);
2811 /* This can be very verbose with lots of headers.
2812 Only print at higher debug levels. */
2813 if (symtab_create_debug
>= 2)
2815 /* Be a bit clever with debugging messages, and don't print objfile
2816 every time, only when it changes. */
2817 static char *last_objfile_name
= NULL
;
2819 if (last_objfile_name
== NULL
2820 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2822 xfree (last_objfile_name
);
2823 last_objfile_name
= xstrdup (objfile_name (objfile
));
2824 fprintf_unfiltered (gdb_stdlog
,
2825 "Creating one or more symtabs for objfile %s ...\n",
2828 fprintf_unfiltered (gdb_stdlog
,
2829 "Created symtab %s for module %s.\n",
2830 host_address_to_string (symtab
), filename
);
2833 /* Add it to CUST's list of symtabs. */
2834 if (cust
->filetabs
== NULL
)
2836 cust
->filetabs
= symtab
;
2837 cust
->last_filetab
= symtab
;
2841 cust
->last_filetab
->next
= symtab
;
2842 cust
->last_filetab
= symtab
;
2845 /* Backlink to the containing compunit symtab. */
2846 symtab
->compunit_symtab
= cust
;
2851 /* Allocate and initialize a new compunit.
2852 NAME is the name of the main source file, if there is one, or some
2853 descriptive text if there are no source files. */
2855 struct compunit_symtab
*
2856 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2858 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2859 struct compunit_symtab
);
2860 const char *saved_name
;
2862 cu
->objfile
= objfile
;
2864 /* The name we record here is only for display/debugging purposes.
2865 Just save the basename to avoid path issues (too long for display,
2866 relative vs absolute, etc.). */
2867 saved_name
= lbasename (name
);
2869 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2870 strlen (saved_name
));
2872 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2874 if (symtab_create_debug
)
2876 fprintf_unfiltered (gdb_stdlog
,
2877 "Created compunit symtab %s for %s.\n",
2878 host_address_to_string (cu
),
2885 /* Hook CU to the objfile it comes from. */
2888 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2890 cu
->next
= cu
->objfile
->compunit_symtabs
;
2891 cu
->objfile
->compunit_symtabs
= cu
;
2895 /* Reset all data structures in gdb which may contain references to
2896 symbol table data. */
2899 clear_symtab_users (symfile_add_flags add_flags
)
2901 /* Someday, we should do better than this, by only blowing away
2902 the things that really need to be blown. */
2904 /* Clear the "current" symtab first, because it is no longer valid.
2905 breakpoint_re_set may try to access the current symtab. */
2906 clear_current_source_symtab_and_line ();
2909 clear_last_displayed_sal ();
2910 clear_pc_function_cache ();
2911 observer_notify_new_objfile (NULL
);
2913 /* Clear globals which might have pointed into a removed objfile.
2914 FIXME: It's not clear which of these are supposed to persist
2915 between expressions and which ought to be reset each time. */
2916 expression_context_block
= NULL
;
2917 innermost_block
= NULL
;
2919 /* Varobj may refer to old symbols, perform a cleanup. */
2920 varobj_invalidate ();
2922 /* Now that the various caches have been cleared, we can re_set
2923 our breakpoints without risking it using stale data. */
2924 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2925 breakpoint_re_set ();
2929 clear_symtab_users_cleanup (void *ignore
)
2931 clear_symtab_users (0);
2935 The following code implements an abstraction for debugging overlay sections.
2937 The target model is as follows:
2938 1) The gnu linker will permit multiple sections to be mapped into the
2939 same VMA, each with its own unique LMA (or load address).
2940 2) It is assumed that some runtime mechanism exists for mapping the
2941 sections, one by one, from the load address into the VMA address.
2942 3) This code provides a mechanism for gdb to keep track of which
2943 sections should be considered to be mapped from the VMA to the LMA.
2944 This information is used for symbol lookup, and memory read/write.
2945 For instance, if a section has been mapped then its contents
2946 should be read from the VMA, otherwise from the LMA.
2948 Two levels of debugger support for overlays are available. One is
2949 "manual", in which the debugger relies on the user to tell it which
2950 overlays are currently mapped. This level of support is
2951 implemented entirely in the core debugger, and the information about
2952 whether a section is mapped is kept in the objfile->obj_section table.
2954 The second level of support is "automatic", and is only available if
2955 the target-specific code provides functionality to read the target's
2956 overlay mapping table, and translate its contents for the debugger
2957 (by updating the mapped state information in the obj_section tables).
2959 The interface is as follows:
2961 overlay map <name> -- tell gdb to consider this section mapped
2962 overlay unmap <name> -- tell gdb to consider this section unmapped
2963 overlay list -- list the sections that GDB thinks are mapped
2964 overlay read-target -- get the target's state of what's mapped
2965 overlay off/manual/auto -- set overlay debugging state
2966 Functional interface:
2967 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2968 section, return that section.
2969 find_pc_overlay(pc): find any overlay section that contains
2970 the pc, either in its VMA or its LMA
2971 section_is_mapped(sect): true if overlay is marked as mapped
2972 section_is_overlay(sect): true if section's VMA != LMA
2973 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2974 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2975 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2976 overlay_mapped_address(...): map an address from section's LMA to VMA
2977 overlay_unmapped_address(...): map an address from section's VMA to LMA
2978 symbol_overlayed_address(...): Return a "current" address for symbol:
2979 either in VMA or LMA depending on whether
2980 the symbol's section is currently mapped. */
2982 /* Overlay debugging state: */
2984 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2985 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2987 /* Function: section_is_overlay (SECTION)
2988 Returns true if SECTION has VMA not equal to LMA, ie.
2989 SECTION is loaded at an address different from where it will "run". */
2992 section_is_overlay (struct obj_section
*section
)
2994 if (overlay_debugging
&& section
)
2996 bfd
*abfd
= section
->objfile
->obfd
;
2997 asection
*bfd_section
= section
->the_bfd_section
;
2999 if (bfd_section_lma (abfd
, bfd_section
) != 0
3000 && bfd_section_lma (abfd
, bfd_section
)
3001 != bfd_section_vma (abfd
, bfd_section
))
3008 /* Function: overlay_invalidate_all (void)
3009 Invalidate the mapped state of all overlay sections (mark it as stale). */
3012 overlay_invalidate_all (void)
3014 struct objfile
*objfile
;
3015 struct obj_section
*sect
;
3017 ALL_OBJSECTIONS (objfile
, sect
)
3018 if (section_is_overlay (sect
))
3019 sect
->ovly_mapped
= -1;
3022 /* Function: section_is_mapped (SECTION)
3023 Returns true if section is an overlay, and is currently mapped.
3025 Access to the ovly_mapped flag is restricted to this function, so
3026 that we can do automatic update. If the global flag
3027 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3028 overlay_invalidate_all. If the mapped state of the particular
3029 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3032 section_is_mapped (struct obj_section
*osect
)
3034 struct gdbarch
*gdbarch
;
3036 if (osect
== 0 || !section_is_overlay (osect
))
3039 switch (overlay_debugging
)
3043 return 0; /* overlay debugging off */
3044 case ovly_auto
: /* overlay debugging automatic */
3045 /* Unles there is a gdbarch_overlay_update function,
3046 there's really nothing useful to do here (can't really go auto). */
3047 gdbarch
= get_objfile_arch (osect
->objfile
);
3048 if (gdbarch_overlay_update_p (gdbarch
))
3050 if (overlay_cache_invalid
)
3052 overlay_invalidate_all ();
3053 overlay_cache_invalid
= 0;
3055 if (osect
->ovly_mapped
== -1)
3056 gdbarch_overlay_update (gdbarch
, osect
);
3058 /* fall thru to manual case */
3059 case ovly_on
: /* overlay debugging manual */
3060 return osect
->ovly_mapped
== 1;
3064 /* Function: pc_in_unmapped_range
3065 If PC falls into the lma range of SECTION, return true, else false. */
3068 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3070 if (section_is_overlay (section
))
3072 bfd
*abfd
= section
->objfile
->obfd
;
3073 asection
*bfd_section
= section
->the_bfd_section
;
3075 /* We assume the LMA is relocated by the same offset as the VMA. */
3076 bfd_vma size
= bfd_get_section_size (bfd_section
);
3077 CORE_ADDR offset
= obj_section_offset (section
);
3079 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3080 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3087 /* Function: pc_in_mapped_range
3088 If PC falls into the vma range of SECTION, return true, else false. */
3091 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3093 if (section_is_overlay (section
))
3095 if (obj_section_addr (section
) <= pc
3096 && pc
< obj_section_endaddr (section
))
3103 /* Return true if the mapped ranges of sections A and B overlap, false
3107 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3109 CORE_ADDR a_start
= obj_section_addr (a
);
3110 CORE_ADDR a_end
= obj_section_endaddr (a
);
3111 CORE_ADDR b_start
= obj_section_addr (b
);
3112 CORE_ADDR b_end
= obj_section_endaddr (b
);
3114 return (a_start
< b_end
&& b_start
< a_end
);
3117 /* Function: overlay_unmapped_address (PC, SECTION)
3118 Returns the address corresponding to PC in the unmapped (load) range.
3119 May be the same as PC. */
3122 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3124 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3126 bfd
*abfd
= section
->objfile
->obfd
;
3127 asection
*bfd_section
= section
->the_bfd_section
;
3129 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3130 - bfd_section_vma (abfd
, bfd_section
);
3136 /* Function: overlay_mapped_address (PC, SECTION)
3137 Returns the address corresponding to PC in the mapped (runtime) range.
3138 May be the same as PC. */
3141 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3143 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3145 bfd
*abfd
= section
->objfile
->obfd
;
3146 asection
*bfd_section
= section
->the_bfd_section
;
3148 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3149 - bfd_section_lma (abfd
, bfd_section
);
3155 /* Function: symbol_overlayed_address
3156 Return one of two addresses (relative to the VMA or to the LMA),
3157 depending on whether the section is mapped or not. */
3160 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3162 if (overlay_debugging
)
3164 /* If the symbol has no section, just return its regular address. */
3167 /* If the symbol's section is not an overlay, just return its
3169 if (!section_is_overlay (section
))
3171 /* If the symbol's section is mapped, just return its address. */
3172 if (section_is_mapped (section
))
3175 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3176 * then return its LOADED address rather than its vma address!!
3178 return overlay_unmapped_address (address
, section
);
3183 /* Function: find_pc_overlay (PC)
3184 Return the best-match overlay section for PC:
3185 If PC matches a mapped overlay section's VMA, return that section.
3186 Else if PC matches an unmapped section's VMA, return that section.
3187 Else if PC matches an unmapped section's LMA, return that section. */
3189 struct obj_section
*
3190 find_pc_overlay (CORE_ADDR pc
)
3192 struct objfile
*objfile
;
3193 struct obj_section
*osect
, *best_match
= NULL
;
3195 if (overlay_debugging
)
3197 ALL_OBJSECTIONS (objfile
, osect
)
3198 if (section_is_overlay (osect
))
3200 if (pc_in_mapped_range (pc
, osect
))
3202 if (section_is_mapped (osect
))
3207 else if (pc_in_unmapped_range (pc
, osect
))
3214 /* Function: find_pc_mapped_section (PC)
3215 If PC falls into the VMA address range of an overlay section that is
3216 currently marked as MAPPED, return that section. Else return NULL. */
3218 struct obj_section
*
3219 find_pc_mapped_section (CORE_ADDR pc
)
3221 struct objfile
*objfile
;
3222 struct obj_section
*osect
;
3224 if (overlay_debugging
)
3226 ALL_OBJSECTIONS (objfile
, osect
)
3227 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3234 /* Function: list_overlays_command
3235 Print a list of mapped sections and their PC ranges. */
3238 list_overlays_command (char *args
, int from_tty
)
3241 struct objfile
*objfile
;
3242 struct obj_section
*osect
;
3244 if (overlay_debugging
)
3246 ALL_OBJSECTIONS (objfile
, osect
)
3247 if (section_is_mapped (osect
))
3249 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3254 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3255 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3256 size
= bfd_get_section_size (osect
->the_bfd_section
);
3257 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3259 printf_filtered ("Section %s, loaded at ", name
);
3260 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3261 puts_filtered (" - ");
3262 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3263 printf_filtered (", mapped at ");
3264 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3265 puts_filtered (" - ");
3266 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3267 puts_filtered ("\n");
3273 printf_filtered (_("No sections are mapped.\n"));
3276 /* Function: map_overlay_command
3277 Mark the named section as mapped (ie. residing at its VMA address). */
3280 map_overlay_command (char *args
, int from_tty
)
3282 struct objfile
*objfile
, *objfile2
;
3283 struct obj_section
*sec
, *sec2
;
3285 if (!overlay_debugging
)
3286 error (_("Overlay debugging not enabled. Use "
3287 "either the 'overlay auto' or\n"
3288 "the 'overlay manual' command."));
3290 if (args
== 0 || *args
== 0)
3291 error (_("Argument required: name of an overlay section"));
3293 /* First, find a section matching the user supplied argument. */
3294 ALL_OBJSECTIONS (objfile
, sec
)
3295 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3297 /* Now, check to see if the section is an overlay. */
3298 if (!section_is_overlay (sec
))
3299 continue; /* not an overlay section */
3301 /* Mark the overlay as "mapped". */
3302 sec
->ovly_mapped
= 1;
3304 /* Next, make a pass and unmap any sections that are
3305 overlapped by this new section: */
3306 ALL_OBJSECTIONS (objfile2
, sec2
)
3307 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3310 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3311 bfd_section_name (objfile
->obfd
,
3312 sec2
->the_bfd_section
));
3313 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3317 error (_("No overlay section called %s"), args
);
3320 /* Function: unmap_overlay_command
3321 Mark the overlay section as unmapped
3322 (ie. resident in its LMA address range, rather than the VMA range). */
3325 unmap_overlay_command (char *args
, int from_tty
)
3327 struct objfile
*objfile
;
3328 struct obj_section
*sec
= NULL
;
3330 if (!overlay_debugging
)
3331 error (_("Overlay debugging not enabled. "
3332 "Use either the 'overlay auto' or\n"
3333 "the 'overlay manual' command."));
3335 if (args
== 0 || *args
== 0)
3336 error (_("Argument required: name of an overlay section"));
3338 /* First, find a section matching the user supplied argument. */
3339 ALL_OBJSECTIONS (objfile
, sec
)
3340 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3342 if (!sec
->ovly_mapped
)
3343 error (_("Section %s is not mapped"), args
);
3344 sec
->ovly_mapped
= 0;
3347 error (_("No overlay section called %s"), args
);
3350 /* Function: overlay_auto_command
3351 A utility command to turn on overlay debugging.
3352 Possibly this should be done via a set/show command. */
3355 overlay_auto_command (char *args
, int from_tty
)
3357 overlay_debugging
= ovly_auto
;
3358 enable_overlay_breakpoints ();
3360 printf_unfiltered (_("Automatic overlay debugging enabled."));
3363 /* Function: overlay_manual_command
3364 A utility command to turn on overlay debugging.
3365 Possibly this should be done via a set/show command. */
3368 overlay_manual_command (char *args
, int from_tty
)
3370 overlay_debugging
= ovly_on
;
3371 disable_overlay_breakpoints ();
3373 printf_unfiltered (_("Overlay debugging enabled."));
3376 /* Function: overlay_off_command
3377 A utility command to turn on overlay debugging.
3378 Possibly this should be done via a set/show command. */
3381 overlay_off_command (char *args
, int from_tty
)
3383 overlay_debugging
= ovly_off
;
3384 disable_overlay_breakpoints ();
3386 printf_unfiltered (_("Overlay debugging disabled."));
3390 overlay_load_command (char *args
, int from_tty
)
3392 struct gdbarch
*gdbarch
= get_current_arch ();
3394 if (gdbarch_overlay_update_p (gdbarch
))
3395 gdbarch_overlay_update (gdbarch
, NULL
);
3397 error (_("This target does not know how to read its overlay state."));
3400 /* Function: overlay_command
3401 A place-holder for a mis-typed command. */
3403 /* Command list chain containing all defined "overlay" subcommands. */
3404 static struct cmd_list_element
*overlaylist
;
3407 overlay_command (char *args
, int from_tty
)
3410 ("\"overlay\" must be followed by the name of an overlay command.\n");
3411 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3414 /* Target Overlays for the "Simplest" overlay manager:
3416 This is GDB's default target overlay layer. It works with the
3417 minimal overlay manager supplied as an example by Cygnus. The
3418 entry point is via a function pointer "gdbarch_overlay_update",
3419 so targets that use a different runtime overlay manager can
3420 substitute their own overlay_update function and take over the
3423 The overlay_update function pokes around in the target's data structures
3424 to see what overlays are mapped, and updates GDB's overlay mapping with
3427 In this simple implementation, the target data structures are as follows:
3428 unsigned _novlys; /# number of overlay sections #/
3429 unsigned _ovly_table[_novlys][4] = {
3430 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3431 {..., ..., ..., ...},
3433 unsigned _novly_regions; /# number of overlay regions #/
3434 unsigned _ovly_region_table[_novly_regions][3] = {
3435 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3438 These functions will attempt to update GDB's mappedness state in the
3439 symbol section table, based on the target's mappedness state.
3441 To do this, we keep a cached copy of the target's _ovly_table, and
3442 attempt to detect when the cached copy is invalidated. The main
3443 entry point is "simple_overlay_update(SECT), which looks up SECT in
3444 the cached table and re-reads only the entry for that section from
3445 the target (whenever possible). */
3447 /* Cached, dynamically allocated copies of the target data structures: */
3448 static unsigned (*cache_ovly_table
)[4] = 0;
3449 static unsigned cache_novlys
= 0;
3450 static CORE_ADDR cache_ovly_table_base
= 0;
3453 VMA
, OSIZE
, LMA
, MAPPED
3456 /* Throw away the cached copy of _ovly_table. */
3459 simple_free_overlay_table (void)
3461 if (cache_ovly_table
)
3462 xfree (cache_ovly_table
);
3464 cache_ovly_table
= NULL
;
3465 cache_ovly_table_base
= 0;
3468 /* Read an array of ints of size SIZE from the target into a local buffer.
3469 Convert to host order. int LEN is number of ints. */
3472 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3473 int len
, int size
, enum bfd_endian byte_order
)
3475 /* FIXME (alloca): Not safe if array is very large. */
3476 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3479 read_memory (memaddr
, buf
, len
* size
);
3480 for (i
= 0; i
< len
; i
++)
3481 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3484 /* Find and grab a copy of the target _ovly_table
3485 (and _novlys, which is needed for the table's size). */
3488 simple_read_overlay_table (void)
3490 struct bound_minimal_symbol novlys_msym
;
3491 struct bound_minimal_symbol ovly_table_msym
;
3492 struct gdbarch
*gdbarch
;
3494 enum bfd_endian byte_order
;
3496 simple_free_overlay_table ();
3497 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3498 if (! novlys_msym
.minsym
)
3500 error (_("Error reading inferior's overlay table: "
3501 "couldn't find `_novlys' variable\n"
3502 "in inferior. Use `overlay manual' mode."));
3506 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3507 if (! ovly_table_msym
.minsym
)
3509 error (_("Error reading inferior's overlay table: couldn't find "
3510 "`_ovly_table' array\n"
3511 "in inferior. Use `overlay manual' mode."));
3515 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3516 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3517 byte_order
= gdbarch_byte_order (gdbarch
);
3519 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3522 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3523 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3524 read_target_long_array (cache_ovly_table_base
,
3525 (unsigned int *) cache_ovly_table
,
3526 cache_novlys
* 4, word_size
, byte_order
);
3528 return 1; /* SUCCESS */
3531 /* Function: simple_overlay_update_1
3532 A helper function for simple_overlay_update. Assuming a cached copy
3533 of _ovly_table exists, look through it to find an entry whose vma,
3534 lma and size match those of OSECT. Re-read the entry and make sure
3535 it still matches OSECT (else the table may no longer be valid).
3536 Set OSECT's mapped state to match the entry. Return: 1 for
3537 success, 0 for failure. */
3540 simple_overlay_update_1 (struct obj_section
*osect
)
3543 bfd
*obfd
= osect
->objfile
->obfd
;
3544 asection
*bsect
= osect
->the_bfd_section
;
3545 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3546 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3547 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3549 for (i
= 0; i
< cache_novlys
; i
++)
3550 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3551 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3553 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3554 (unsigned int *) cache_ovly_table
[i
],
3555 4, word_size
, byte_order
);
3556 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3557 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3559 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3562 else /* Warning! Warning! Target's ovly table has changed! */
3568 /* Function: simple_overlay_update
3569 If OSECT is NULL, then update all sections' mapped state
3570 (after re-reading the entire target _ovly_table).
3571 If OSECT is non-NULL, then try to find a matching entry in the
3572 cached ovly_table and update only OSECT's mapped state.
3573 If a cached entry can't be found or the cache isn't valid, then
3574 re-read the entire cache, and go ahead and update all sections. */
3577 simple_overlay_update (struct obj_section
*osect
)
3579 struct objfile
*objfile
;
3581 /* Were we given an osect to look up? NULL means do all of them. */
3583 /* Have we got a cached copy of the target's overlay table? */
3584 if (cache_ovly_table
!= NULL
)
3586 /* Does its cached location match what's currently in the
3588 struct bound_minimal_symbol minsym
3589 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3591 if (minsym
.minsym
== NULL
)
3592 error (_("Error reading inferior's overlay table: couldn't "
3593 "find `_ovly_table' array\n"
3594 "in inferior. Use `overlay manual' mode."));
3596 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3597 /* Then go ahead and try to look up this single section in
3599 if (simple_overlay_update_1 (osect
))
3600 /* Found it! We're done. */
3604 /* Cached table no good: need to read the entire table anew.
3605 Or else we want all the sections, in which case it's actually
3606 more efficient to read the whole table in one block anyway. */
3608 if (! simple_read_overlay_table ())
3611 /* Now may as well update all sections, even if only one was requested. */
3612 ALL_OBJSECTIONS (objfile
, osect
)
3613 if (section_is_overlay (osect
))
3616 bfd
*obfd
= osect
->objfile
->obfd
;
3617 asection
*bsect
= osect
->the_bfd_section
;
3619 for (i
= 0; i
< cache_novlys
; i
++)
3620 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3621 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3622 { /* obj_section matches i'th entry in ovly_table. */
3623 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3624 break; /* finished with inner for loop: break out. */
3629 /* Set the output sections and output offsets for section SECTP in
3630 ABFD. The relocation code in BFD will read these offsets, so we
3631 need to be sure they're initialized. We map each section to itself,
3632 with no offset; this means that SECTP->vma will be honored. */
3635 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3637 sectp
->output_section
= sectp
;
3638 sectp
->output_offset
= 0;
3641 /* Default implementation for sym_relocate. */
3644 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3647 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3649 bfd
*abfd
= sectp
->owner
;
3651 /* We're only interested in sections with relocation
3653 if ((sectp
->flags
& SEC_RELOC
) == 0)
3656 /* We will handle section offsets properly elsewhere, so relocate as if
3657 all sections begin at 0. */
3658 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3660 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3663 /* Relocate the contents of a debug section SECTP in ABFD. The
3664 contents are stored in BUF if it is non-NULL, or returned in a
3665 malloc'd buffer otherwise.
3667 For some platforms and debug info formats, shared libraries contain
3668 relocations against the debug sections (particularly for DWARF-2;
3669 one affected platform is PowerPC GNU/Linux, although it depends on
3670 the version of the linker in use). Also, ELF object files naturally
3671 have unresolved relocations for their debug sections. We need to apply
3672 the relocations in order to get the locations of symbols correct.
3673 Another example that may require relocation processing, is the
3674 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3678 symfile_relocate_debug_section (struct objfile
*objfile
,
3679 asection
*sectp
, bfd_byte
*buf
)
3681 gdb_assert (objfile
->sf
->sym_relocate
);
3683 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3686 struct symfile_segment_data
*
3687 get_symfile_segment_data (bfd
*abfd
)
3689 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3694 return sf
->sym_segments (abfd
);
3698 free_symfile_segment_data (struct symfile_segment_data
*data
)
3700 xfree (data
->segment_bases
);
3701 xfree (data
->segment_sizes
);
3702 xfree (data
->segment_info
);
3707 - DATA, containing segment addresses from the object file ABFD, and
3708 the mapping from ABFD's sections onto the segments that own them,
3710 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3711 segment addresses reported by the target,
3712 store the appropriate offsets for each section in OFFSETS.
3714 If there are fewer entries in SEGMENT_BASES than there are segments
3715 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3717 If there are more entries, then ignore the extra. The target may
3718 not be able to distinguish between an empty data segment and a
3719 missing data segment; a missing text segment is less plausible. */
3722 symfile_map_offsets_to_segments (bfd
*abfd
,
3723 const struct symfile_segment_data
*data
,
3724 struct section_offsets
*offsets
,
3725 int num_segment_bases
,
3726 const CORE_ADDR
*segment_bases
)
3731 /* It doesn't make sense to call this function unless you have some
3732 segment base addresses. */
3733 gdb_assert (num_segment_bases
> 0);
3735 /* If we do not have segment mappings for the object file, we
3736 can not relocate it by segments. */
3737 gdb_assert (data
!= NULL
);
3738 gdb_assert (data
->num_segments
> 0);
3740 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3742 int which
= data
->segment_info
[i
];
3744 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3746 /* Don't bother computing offsets for sections that aren't
3747 loaded as part of any segment. */
3751 /* Use the last SEGMENT_BASES entry as the address of any extra
3752 segments mentioned in DATA->segment_info. */
3753 if (which
> num_segment_bases
)
3754 which
= num_segment_bases
;
3756 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3757 - data
->segment_bases
[which
- 1]);
3764 symfile_find_segment_sections (struct objfile
*objfile
)
3766 bfd
*abfd
= objfile
->obfd
;
3769 struct symfile_segment_data
*data
;
3771 data
= get_symfile_segment_data (objfile
->obfd
);
3775 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3777 free_symfile_segment_data (data
);
3781 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3783 int which
= data
->segment_info
[i
];
3787 if (objfile
->sect_index_text
== -1)
3788 objfile
->sect_index_text
= sect
->index
;
3790 if (objfile
->sect_index_rodata
== -1)
3791 objfile
->sect_index_rodata
= sect
->index
;
3793 else if (which
== 2)
3795 if (objfile
->sect_index_data
== -1)
3796 objfile
->sect_index_data
= sect
->index
;
3798 if (objfile
->sect_index_bss
== -1)
3799 objfile
->sect_index_bss
= sect
->index
;
3803 free_symfile_segment_data (data
);
3806 /* Listen for free_objfile events. */
3809 symfile_free_objfile (struct objfile
*objfile
)
3811 /* Remove the target sections owned by this objfile. */
3812 if (objfile
!= NULL
)
3813 remove_target_sections ((void *) objfile
);
3816 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3817 Expand all symtabs that match the specified criteria.
3818 See quick_symbol_functions.expand_symtabs_matching for details. */
3821 expand_symtabs_matching
3822 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3823 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3824 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3825 enum search_domain kind
)
3827 struct objfile
*objfile
;
3829 ALL_OBJFILES (objfile
)
3832 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3834 expansion_notify
, kind
);
3838 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3839 Map function FUN over every file.
3840 See quick_symbol_functions.map_symbol_filenames for details. */
3843 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3846 struct objfile
*objfile
;
3848 ALL_OBJFILES (objfile
)
3851 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3857 _initialize_symfile (void)
3859 struct cmd_list_element
*c
;
3861 observer_attach_free_objfile (symfile_free_objfile
);
3863 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3864 Load symbol table from executable file FILE.\n\
3865 The `file' command can also load symbol tables, as well as setting the file\n\
3866 to execute."), &cmdlist
);
3867 set_cmd_completer (c
, filename_completer
);
3869 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3870 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3871 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3872 ...]\nADDR is the starting address of the file's text.\n\
3873 The optional arguments are section-name section-address pairs and\n\
3874 should be specified if the data and bss segments are not contiguous\n\
3875 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3877 set_cmd_completer (c
, filename_completer
);
3879 c
= add_cmd ("remove-symbol-file", class_files
,
3880 remove_symbol_file_command
, _("\
3881 Remove a symbol file added via the add-symbol-file command.\n\
3882 Usage: remove-symbol-file FILENAME\n\
3883 remove-symbol-file -a ADDRESS\n\
3884 The file to remove can be identified by its filename or by an address\n\
3885 that lies within the boundaries of this symbol file in memory."),
3888 c
= add_cmd ("load", class_files
, load_command
, _("\
3889 Dynamically load FILE into the running program, and record its symbols\n\
3890 for access from GDB.\n\
3891 An optional load OFFSET may also be given as a literal address.\n\
3892 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3894 Usage: load [FILE] [OFFSET]"), &cmdlist
);
3895 set_cmd_completer (c
, filename_completer
);
3897 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3898 _("Commands for debugging overlays."), &overlaylist
,
3899 "overlay ", 0, &cmdlist
);
3901 add_com_alias ("ovly", "overlay", class_alias
, 1);
3902 add_com_alias ("ov", "overlay", class_alias
, 1);
3904 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3905 _("Assert that an overlay section is mapped."), &overlaylist
);
3907 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3908 _("Assert that an overlay section is unmapped."), &overlaylist
);
3910 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3911 _("List mappings of overlay sections."), &overlaylist
);
3913 add_cmd ("manual", class_support
, overlay_manual_command
,
3914 _("Enable overlay debugging."), &overlaylist
);
3915 add_cmd ("off", class_support
, overlay_off_command
,
3916 _("Disable overlay debugging."), &overlaylist
);
3917 add_cmd ("auto", class_support
, overlay_auto_command
,
3918 _("Enable automatic overlay debugging."), &overlaylist
);
3919 add_cmd ("load-target", class_support
, overlay_load_command
,
3920 _("Read the overlay mapping state from the target."), &overlaylist
);
3922 /* Filename extension to source language lookup table: */
3923 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3925 Set mapping between filename extension and source language."), _("\
3926 Show mapping between filename extension and source language."), _("\
3927 Usage: set extension-language .foo bar"),
3928 set_ext_lang_command
,
3930 &setlist
, &showlist
);
3932 add_info ("extensions", info_ext_lang_command
,
3933 _("All filename extensions associated with a source language."));
3935 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3936 &debug_file_directory
, _("\
3937 Set the directories where separate debug symbols are searched for."), _("\
3938 Show the directories where separate debug symbols are searched for."), _("\
3939 Separate debug symbols are first searched for in the same\n\
3940 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3941 and lastly at the path of the directory of the binary with\n\
3942 each global debug-file-directory component prepended."),
3944 show_debug_file_directory
,
3945 &setlist
, &showlist
);
3947 add_setshow_enum_cmd ("symbol-loading", no_class
,
3948 print_symbol_loading_enums
, &print_symbol_loading
,
3950 Set printing of symbol loading messages."), _("\
3951 Show printing of symbol loading messages."), _("\
3952 off == turn all messages off\n\
3953 brief == print messages for the executable,\n\
3954 and brief messages for shared libraries\n\
3955 full == print messages for the executable,\n\
3956 and messages for each shared library."),
3959 &setprintlist
, &showprintlist
);
3961 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3962 &separate_debug_file_debug
, _("\
3963 Set printing of separate debug info file search debug."), _("\
3964 Show printing of separate debug info file search debug."), _("\
3965 When on, GDB prints the searched locations while looking for separate debug \
3966 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);