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 /* List of all available sym_fns. On gdb startup, each object file reader
120 calls add_symtab_fns() to register information on each format it is
125 /* BFD flavour that we handle. */
126 enum bfd_flavour sym_flavour
;
128 /* The "vtable" of symbol functions. */
129 const struct sym_fns
*sym_fns
;
130 } registered_sym_fns
;
132 DEF_VEC_O (registered_sym_fns
);
134 static VEC (registered_sym_fns
) *symtab_fns
= NULL
;
136 /* Values for "set print symbol-loading". */
138 const char print_symbol_loading_off
[] = "off";
139 const char print_symbol_loading_brief
[] = "brief";
140 const char print_symbol_loading_full
[] = "full";
141 static const char *print_symbol_loading_enums
[] =
143 print_symbol_loading_off
,
144 print_symbol_loading_brief
,
145 print_symbol_loading_full
,
148 static const char *print_symbol_loading
= print_symbol_loading_full
;
150 /* If non-zero, shared library symbols will be added automatically
151 when the inferior is created, new libraries are loaded, or when
152 attaching to the inferior. This is almost always what users will
153 want to have happen; but for very large programs, the startup time
154 will be excessive, and so if this is a problem, the user can clear
155 this flag and then add the shared library symbols as needed. Note
156 that there is a potential for confusion, since if the shared
157 library symbols are not loaded, commands like "info fun" will *not*
158 report all the functions that are actually present. */
160 int auto_solib_add
= 1;
163 /* Return non-zero if symbol-loading messages should be printed.
164 FROM_TTY is the standard from_tty argument to gdb commands.
165 If EXEC is non-zero the messages are for the executable.
166 Otherwise, messages are for shared libraries.
167 If FULL is non-zero then the caller is printing a detailed message.
168 E.g., the message includes the shared library name.
169 Otherwise, the caller is printing a brief "summary" message. */
172 print_symbol_loading_p (int from_tty
, int exec
, int full
)
174 if (!from_tty
&& !info_verbose
)
179 /* We don't check FULL for executables, there are few such
180 messages, therefore brief == full. */
181 return print_symbol_loading
!= print_symbol_loading_off
;
184 return print_symbol_loading
== print_symbol_loading_full
;
185 return print_symbol_loading
== print_symbol_loading_brief
;
188 /* True if we are reading a symbol table. */
190 int currently_reading_symtab
= 0;
192 /* Increment currently_reading_symtab and return a cleanup that can be
193 used to decrement it. */
195 scoped_restore_tmpl
<int>
196 increment_reading_symtab (void)
198 gdb_assert (currently_reading_symtab
>= 0);
199 return make_scoped_restore (¤tly_reading_symtab
,
200 currently_reading_symtab
+ 1);
203 /* Remember the lowest-addressed loadable section we've seen.
204 This function is called via bfd_map_over_sections.
206 In case of equal vmas, the section with the largest size becomes the
207 lowest-addressed loadable section.
209 If the vmas and sizes are equal, the last section is considered the
210 lowest-addressed loadable section. */
213 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
215 asection
**lowest
= (asection
**) obj
;
217 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
220 *lowest
= sect
; /* First loadable section */
221 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
222 *lowest
= sect
; /* A lower loadable section */
223 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
224 && (bfd_section_size (abfd
, (*lowest
))
225 <= bfd_section_size (abfd
, sect
)))
229 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
230 new object's 'num_sections' field is set to 0; it must be updated
233 struct section_addr_info
*
234 alloc_section_addr_info (size_t num_sections
)
236 struct section_addr_info
*sap
;
239 size
= (sizeof (struct section_addr_info
)
240 + sizeof (struct other_sections
) * (num_sections
- 1));
241 sap
= (struct section_addr_info
*) xmalloc (size
);
242 memset (sap
, 0, size
);
247 /* Build (allocate and populate) a section_addr_info struct from
248 an existing section table. */
250 extern struct section_addr_info
*
251 build_section_addr_info_from_section_table (const struct target_section
*start
,
252 const struct target_section
*end
)
254 struct section_addr_info
*sap
;
255 const struct target_section
*stp
;
258 sap
= alloc_section_addr_info (end
- start
);
260 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
262 struct bfd_section
*asect
= stp
->the_bfd_section
;
263 bfd
*abfd
= asect
->owner
;
265 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
266 && oidx
< end
- start
)
268 sap
->other
[oidx
].addr
= stp
->addr
;
269 sap
->other
[oidx
].name
= xstrdup (bfd_section_name (abfd
, asect
));
270 sap
->other
[oidx
].sectindex
= gdb_bfd_section_index (abfd
, asect
);
275 sap
->num_sections
= oidx
;
280 /* Create a section_addr_info from section offsets in ABFD. */
282 static struct section_addr_info
*
283 build_section_addr_info_from_bfd (bfd
*abfd
)
285 struct section_addr_info
*sap
;
287 struct bfd_section
*sec
;
289 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
290 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
291 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
293 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
294 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
295 sap
->other
[i
].sectindex
= gdb_bfd_section_index (abfd
, sec
);
299 sap
->num_sections
= i
;
304 /* Create a section_addr_info from section offsets in OBJFILE. */
306 struct section_addr_info
*
307 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
309 struct section_addr_info
*sap
;
312 /* Before reread_symbols gets rewritten it is not safe to call:
313 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
315 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
316 for (i
= 0; i
< sap
->num_sections
; i
++)
318 int sectindex
= sap
->other
[i
].sectindex
;
320 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
325 /* Free all memory allocated by build_section_addr_info_from_section_table. */
328 free_section_addr_info (struct section_addr_info
*sap
)
332 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
333 xfree (sap
->other
[idx
].name
);
337 /* Initialize OBJFILE's sect_index_* members. */
340 init_objfile_sect_indices (struct objfile
*objfile
)
345 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
347 objfile
->sect_index_text
= sect
->index
;
349 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
351 objfile
->sect_index_data
= sect
->index
;
353 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
355 objfile
->sect_index_bss
= sect
->index
;
357 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
359 objfile
->sect_index_rodata
= sect
->index
;
361 /* This is where things get really weird... We MUST have valid
362 indices for the various sect_index_* members or gdb will abort.
363 So if for example, there is no ".text" section, we have to
364 accomodate that. First, check for a file with the standard
365 one or two segments. */
367 symfile_find_segment_sections (objfile
);
369 /* Except when explicitly adding symbol files at some address,
370 section_offsets contains nothing but zeros, so it doesn't matter
371 which slot in section_offsets the individual sect_index_* members
372 index into. So if they are all zero, it is safe to just point
373 all the currently uninitialized indices to the first slot. But
374 beware: if this is the main executable, it may be relocated
375 later, e.g. by the remote qOffsets packet, and then this will
376 be wrong! That's why we try segments first. */
378 for (i
= 0; i
< objfile
->num_sections
; i
++)
380 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
385 if (i
== objfile
->num_sections
)
387 if (objfile
->sect_index_text
== -1)
388 objfile
->sect_index_text
= 0;
389 if (objfile
->sect_index_data
== -1)
390 objfile
->sect_index_data
= 0;
391 if (objfile
->sect_index_bss
== -1)
392 objfile
->sect_index_bss
= 0;
393 if (objfile
->sect_index_rodata
== -1)
394 objfile
->sect_index_rodata
= 0;
398 /* The arguments to place_section. */
400 struct place_section_arg
402 struct section_offsets
*offsets
;
406 /* Find a unique offset to use for loadable section SECT if
407 the user did not provide an offset. */
410 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
412 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
413 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
415 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
417 /* We are only interested in allocated sections. */
418 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
421 /* If the user specified an offset, honor it. */
422 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
425 /* Otherwise, let's try to find a place for the section. */
426 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
433 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
435 int indx
= cur_sec
->index
;
437 /* We don't need to compare against ourself. */
441 /* We can only conflict with allocated sections. */
442 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
445 /* If the section offset is 0, either the section has not been placed
446 yet, or it was the lowest section placed (in which case LOWEST
447 will be past its end). */
448 if (offsets
[indx
] == 0)
451 /* If this section would overlap us, then we must move up. */
452 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
453 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
455 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
456 start_addr
= (start_addr
+ align
- 1) & -align
;
461 /* Otherwise, we appear to be OK. So far. */
466 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
467 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
470 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
471 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
475 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
477 const struct section_addr_info
*addrs
)
481 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
483 /* Now calculate offsets for section that were specified by the caller. */
484 for (i
= 0; i
< addrs
->num_sections
; i
++)
486 const struct other_sections
*osp
;
488 osp
= &addrs
->other
[i
];
489 if (osp
->sectindex
== -1)
492 /* Record all sections in offsets. */
493 /* The section_offsets in the objfile are here filled in using
495 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
499 /* Transform section name S for a name comparison. prelink can split section
500 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
501 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
502 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
503 (`.sbss') section has invalid (increased) virtual address. */
506 addr_section_name (const char *s
)
508 if (strcmp (s
, ".dynbss") == 0)
510 if (strcmp (s
, ".sdynbss") == 0)
516 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
517 their (name, sectindex) pair. sectindex makes the sort by name stable. */
520 addrs_section_compar (const void *ap
, const void *bp
)
522 const struct other_sections
*a
= *((struct other_sections
**) ap
);
523 const struct other_sections
*b
= *((struct other_sections
**) bp
);
526 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
530 return a
->sectindex
- b
->sectindex
;
533 /* Provide sorted array of pointers to sections of ADDRS. The array is
534 terminated by NULL. Caller is responsible to call xfree for it. */
536 static struct other_sections
**
537 addrs_section_sort (struct section_addr_info
*addrs
)
539 struct other_sections
**array
;
542 /* `+ 1' for the NULL terminator. */
543 array
= XNEWVEC (struct other_sections
*, addrs
->num_sections
+ 1);
544 for (i
= 0; i
< addrs
->num_sections
; i
++)
545 array
[i
] = &addrs
->other
[i
];
548 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
553 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
554 also SECTINDEXes specific to ABFD there. This function can be used to
555 rebase ADDRS to start referencing different BFD than before. */
558 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
560 asection
*lower_sect
;
561 CORE_ADDR lower_offset
;
563 struct cleanup
*my_cleanup
;
564 struct section_addr_info
*abfd_addrs
;
565 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
566 struct other_sections
**addrs_to_abfd_addrs
;
568 /* Find lowest loadable section to be used as starting point for
569 continguous sections. */
571 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
572 if (lower_sect
== NULL
)
574 warning (_("no loadable sections found in added symbol-file %s"),
575 bfd_get_filename (abfd
));
579 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
581 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
582 in ABFD. Section names are not unique - there can be multiple sections of
583 the same name. Also the sections of the same name do not have to be
584 adjacent to each other. Some sections may be present only in one of the
585 files. Even sections present in both files do not have to be in the same
588 Use stable sort by name for the sections in both files. Then linearly
589 scan both lists matching as most of the entries as possible. */
591 addrs_sorted
= addrs_section_sort (addrs
);
592 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
594 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
595 make_cleanup_free_section_addr_info (abfd_addrs
);
596 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
597 make_cleanup (xfree
, abfd_addrs_sorted
);
599 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
600 ABFD_ADDRS_SORTED. */
602 addrs_to_abfd_addrs
= XCNEWVEC (struct other_sections
*, addrs
->num_sections
);
603 make_cleanup (xfree
, addrs_to_abfd_addrs
);
605 while (*addrs_sorted
)
607 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
609 while (*abfd_addrs_sorted
610 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
614 if (*abfd_addrs_sorted
615 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
620 /* Make the found item directly addressable from ADDRS. */
621 index_in_addrs
= *addrs_sorted
- addrs
->other
;
622 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
623 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
625 /* Never use the same ABFD entry twice. */
632 /* Calculate offsets for the loadable sections.
633 FIXME! Sections must be in order of increasing loadable section
634 so that contiguous sections can use the lower-offset!!!
636 Adjust offsets if the segments are not contiguous.
637 If the section is contiguous, its offset should be set to
638 the offset of the highest loadable section lower than it
639 (the loadable section directly below it in memory).
640 this_offset = lower_offset = lower_addr - lower_orig_addr */
642 for (i
= 0; i
< addrs
->num_sections
; i
++)
644 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
648 /* This is the index used by BFD. */
649 addrs
->other
[i
].sectindex
= sect
->sectindex
;
651 if (addrs
->other
[i
].addr
!= 0)
653 addrs
->other
[i
].addr
-= sect
->addr
;
654 lower_offset
= addrs
->other
[i
].addr
;
657 addrs
->other
[i
].addr
= lower_offset
;
661 /* addr_section_name transformation is not used for SECT_NAME. */
662 const char *sect_name
= addrs
->other
[i
].name
;
664 /* This section does not exist in ABFD, which is normally
665 unexpected and we want to issue a warning.
667 However, the ELF prelinker does create a few sections which are
668 marked in the main executable as loadable (they are loaded in
669 memory from the DYNAMIC segment) and yet are not present in
670 separate debug info files. This is fine, and should not cause
671 a warning. Shared libraries contain just the section
672 ".gnu.liblist" but it is not marked as loadable there. There is
673 no other way to identify them than by their name as the sections
674 created by prelink have no special flags.
676 For the sections `.bss' and `.sbss' see addr_section_name. */
678 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
679 || strcmp (sect_name
, ".gnu.conflict") == 0
680 || (strcmp (sect_name
, ".bss") == 0
682 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
683 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
684 || (strcmp (sect_name
, ".sbss") == 0
686 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
687 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
688 warning (_("section %s not found in %s"), sect_name
,
689 bfd_get_filename (abfd
));
691 addrs
->other
[i
].addr
= 0;
692 addrs
->other
[i
].sectindex
= -1;
696 do_cleanups (my_cleanup
);
699 /* Parse the user's idea of an offset for dynamic linking, into our idea
700 of how to represent it for fast symbol reading. This is the default
701 version of the sym_fns.sym_offsets function for symbol readers that
702 don't need to do anything special. It allocates a section_offsets table
703 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
706 default_symfile_offsets (struct objfile
*objfile
,
707 const struct section_addr_info
*addrs
)
709 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
710 objfile
->section_offsets
= (struct section_offsets
*)
711 obstack_alloc (&objfile
->objfile_obstack
,
712 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
713 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
714 objfile
->num_sections
, addrs
);
716 /* For relocatable files, all loadable sections will start at zero.
717 The zero is meaningless, so try to pick arbitrary addresses such
718 that no loadable sections overlap. This algorithm is quadratic,
719 but the number of sections in a single object file is generally
721 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
723 struct place_section_arg arg
;
724 bfd
*abfd
= objfile
->obfd
;
727 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
728 /* We do not expect this to happen; just skip this step if the
729 relocatable file has a section with an assigned VMA. */
730 if (bfd_section_vma (abfd
, cur_sec
) != 0)
735 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
737 /* Pick non-overlapping offsets for sections the user did not
739 arg
.offsets
= objfile
->section_offsets
;
741 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
743 /* Correctly filling in the section offsets is not quite
744 enough. Relocatable files have two properties that
745 (most) shared objects do not:
747 - Their debug information will contain relocations. Some
748 shared libraries do also, but many do not, so this can not
751 - If there are multiple code sections they will be loaded
752 at different relative addresses in memory than they are
753 in the objfile, since all sections in the file will start
756 Because GDB has very limited ability to map from an
757 address in debug info to the correct code section,
758 it relies on adding SECT_OFF_TEXT to things which might be
759 code. If we clear all the section offsets, and set the
760 section VMAs instead, then symfile_relocate_debug_section
761 will return meaningful debug information pointing at the
764 GDB has too many different data structures for section
765 addresses - a bfd, objfile, and so_list all have section
766 tables, as does exec_ops. Some of these could probably
769 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
770 cur_sec
= cur_sec
->next
)
772 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
775 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
776 exec_set_section_address (bfd_get_filename (abfd
),
778 offsets
[cur_sec
->index
]);
779 offsets
[cur_sec
->index
] = 0;
784 /* Remember the bfd indexes for the .text, .data, .bss and
786 init_objfile_sect_indices (objfile
);
789 /* Divide the file into segments, which are individual relocatable units.
790 This is the default version of the sym_fns.sym_segments function for
791 symbol readers that do not have an explicit representation of segments.
792 It assumes that object files do not have segments, and fully linked
793 files have a single segment. */
795 struct symfile_segment_data
*
796 default_symfile_segments (bfd
*abfd
)
800 struct symfile_segment_data
*data
;
803 /* Relocatable files contain enough information to position each
804 loadable section independently; they should not be relocated
806 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
809 /* Make sure there is at least one loadable section in the file. */
810 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
812 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
820 low
= bfd_get_section_vma (abfd
, sect
);
821 high
= low
+ bfd_get_section_size (sect
);
823 data
= XCNEW (struct symfile_segment_data
);
824 data
->num_segments
= 1;
825 data
->segment_bases
= XCNEW (CORE_ADDR
);
826 data
->segment_sizes
= XCNEW (CORE_ADDR
);
828 num_sections
= bfd_count_sections (abfd
);
829 data
->segment_info
= XCNEWVEC (int, num_sections
);
831 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
835 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
838 vma
= bfd_get_section_vma (abfd
, sect
);
841 if (vma
+ bfd_get_section_size (sect
) > high
)
842 high
= vma
+ bfd_get_section_size (sect
);
844 data
->segment_info
[i
] = 1;
847 data
->segment_bases
[0] = low
;
848 data
->segment_sizes
[0] = high
- low
;
853 /* This is a convenience function to call sym_read for OBJFILE and
854 possibly force the partial symbols to be read. */
857 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
859 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
860 objfile
->per_bfd
->minsyms_read
= true;
862 /* find_separate_debug_file_in_section should be called only if there is
863 single binary with no existing separate debug info file. */
864 if (!objfile_has_partial_symbols (objfile
)
865 && objfile
->separate_debug_objfile
== NULL
866 && objfile
->separate_debug_objfile_backlink
== NULL
)
868 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
872 /* find_separate_debug_file_in_section uses the same filename for the
873 virtual section-as-bfd like the bfd filename containing the
874 section. Therefore use also non-canonical name form for the same
875 file containing the section. */
876 symbol_file_add_separate (abfd
.get (), objfile
->original_name
,
880 if ((add_flags
& SYMFILE_NO_READ
) == 0)
881 require_partial_symbols (objfile
, 0);
884 /* Initialize entry point information for this objfile. */
887 init_entry_point_info (struct objfile
*objfile
)
889 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
895 /* Save startup file's range of PC addresses to help blockframe.c
896 decide where the bottom of the stack is. */
898 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
900 /* Executable file -- record its entry point so we'll recognize
901 the startup file because it contains the entry point. */
902 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
903 ei
->entry_point_p
= 1;
905 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
906 && bfd_get_start_address (objfile
->obfd
) != 0)
908 /* Some shared libraries may have entry points set and be
909 runnable. There's no clear way to indicate this, so just check
910 for values other than zero. */
911 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
912 ei
->entry_point_p
= 1;
916 /* Examination of non-executable.o files. Short-circuit this stuff. */
917 ei
->entry_point_p
= 0;
920 if (ei
->entry_point_p
)
922 struct obj_section
*osect
;
923 CORE_ADDR entry_point
= ei
->entry_point
;
926 /* Make certain that the address points at real code, and not a
927 function descriptor. */
929 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
933 /* Remove any ISA markers, so that this matches entries in the
936 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
939 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
941 struct bfd_section
*sect
= osect
->the_bfd_section
;
943 if (entry_point
>= bfd_get_section_vma (objfile
->obfd
, sect
)
944 && entry_point
< (bfd_get_section_vma (objfile
->obfd
, sect
)
945 + bfd_get_section_size (sect
)))
947 ei
->the_bfd_section_index
948 = gdb_bfd_section_index (objfile
->obfd
, sect
);
955 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
959 /* Process a symbol file, as either the main file or as a dynamically
962 This function does not set the OBJFILE's entry-point info.
964 OBJFILE is where the symbols are to be read from.
966 ADDRS is the list of section load addresses. If the user has given
967 an 'add-symbol-file' command, then this is the list of offsets and
968 addresses he or she provided as arguments to the command; or, if
969 we're handling a shared library, these are the actual addresses the
970 sections are loaded at, according to the inferior's dynamic linker
971 (as gleaned by GDB's shared library code). We convert each address
972 into an offset from the section VMA's as it appears in the object
973 file, and then call the file's sym_offsets function to convert this
974 into a format-specific offset table --- a `struct section_offsets'.
976 ADD_FLAGS encodes verbosity level, whether this is main symbol or
977 an extra symbol file such as dynamically loaded code, and wether
978 breakpoint reset should be deferred. */
981 syms_from_objfile_1 (struct objfile
*objfile
,
982 struct section_addr_info
*addrs
,
983 symfile_add_flags add_flags
)
985 struct section_addr_info
*local_addr
= NULL
;
986 struct cleanup
*old_chain
;
987 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
989 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
991 if (objfile
->sf
== NULL
)
993 /* No symbols to load, but we still need to make sure
994 that the section_offsets table is allocated. */
995 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
996 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
998 objfile
->num_sections
= num_sections
;
999 objfile
->section_offsets
1000 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
1002 memset (objfile
->section_offsets
, 0, size
);
1006 /* Make sure that partially constructed symbol tables will be cleaned up
1007 if an error occurs during symbol reading. */
1008 old_chain
= make_cleanup_free_objfile (objfile
);
1010 /* If ADDRS is NULL, put together a dummy address list.
1011 We now establish the convention that an addr of zero means
1012 no load address was specified. */
1015 local_addr
= alloc_section_addr_info (1);
1016 make_cleanup (xfree
, local_addr
);
1022 /* We will modify the main symbol table, make sure that all its users
1023 will be cleaned up if an error occurs during symbol reading. */
1024 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1026 /* Since no error yet, throw away the old symbol table. */
1028 if (symfile_objfile
!= NULL
)
1030 free_objfile (symfile_objfile
);
1031 gdb_assert (symfile_objfile
== NULL
);
1034 /* Currently we keep symbols from the add-symbol-file command.
1035 If the user wants to get rid of them, they should do "symbol-file"
1036 without arguments first. Not sure this is the best behavior
1039 (*objfile
->sf
->sym_new_init
) (objfile
);
1042 /* Convert addr into an offset rather than an absolute address.
1043 We find the lowest address of a loaded segment in the objfile,
1044 and assume that <addr> is where that got loaded.
1046 We no longer warn if the lowest section is not a text segment (as
1047 happens for the PA64 port. */
1048 if (addrs
->num_sections
> 0)
1049 addr_info_make_relative (addrs
, objfile
->obfd
);
1051 /* Initialize symbol reading routines for this objfile, allow complaints to
1052 appear for this new file, and record how verbose to be, then do the
1053 initial symbol reading for this file. */
1055 (*objfile
->sf
->sym_init
) (objfile
);
1056 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1058 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1060 read_symbols (objfile
, add_flags
);
1062 /* Discard cleanups as symbol reading was successful. */
1064 discard_cleanups (old_chain
);
1068 /* Same as syms_from_objfile_1, but also initializes the objfile
1069 entry-point info. */
1072 syms_from_objfile (struct objfile
*objfile
,
1073 struct section_addr_info
*addrs
,
1074 symfile_add_flags add_flags
)
1076 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1077 init_entry_point_info (objfile
);
1080 /* Perform required actions after either reading in the initial
1081 symbols for a new objfile, or mapping in the symbols from a reusable
1082 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1085 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1087 /* If this is the main symbol file we have to clean up all users of the
1088 old main symbol file. Otherwise it is sufficient to fixup all the
1089 breakpoints that may have been redefined by this symbol file. */
1090 if (add_flags
& SYMFILE_MAINLINE
)
1092 /* OK, make it the "real" symbol file. */
1093 symfile_objfile
= objfile
;
1095 clear_symtab_users (add_flags
);
1097 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1099 breakpoint_re_set ();
1102 /* We're done reading the symbol file; finish off complaints. */
1103 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1106 /* Process a symbol file, as either the main file or as a dynamically
1109 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1110 A new reference is acquired by this function.
1112 For NAME description see allocate_objfile's definition.
1114 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1115 extra, such as dynamically loaded code, and what to do with breakpoins.
1117 ADDRS is as described for syms_from_objfile_1, above.
1118 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1120 PARENT is the original objfile if ABFD is a separate debug info file.
1121 Otherwise PARENT is NULL.
1123 Upon success, returns a pointer to the objfile that was added.
1124 Upon failure, jumps back to command level (never returns). */
1126 static struct objfile
*
1127 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1128 symfile_add_flags add_flags
,
1129 struct section_addr_info
*addrs
,
1130 objfile_flags flags
, struct objfile
*parent
)
1132 struct objfile
*objfile
;
1133 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1134 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1135 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1136 && (readnow_symbol_files
1137 || (add_flags
& SYMFILE_NO_READ
) == 0));
1139 if (readnow_symbol_files
)
1141 flags
|= OBJF_READNOW
;
1142 add_flags
&= ~SYMFILE_NO_READ
;
1145 /* Give user a chance to burp if we'd be
1146 interactively wiping out any existing symbols. */
1148 if ((have_full_symbols () || have_partial_symbols ())
1151 && !query (_("Load new symbol table from \"%s\"? "), name
))
1152 error (_("Not confirmed."));
1155 flags
|= OBJF_MAINLINE
;
1156 objfile
= allocate_objfile (abfd
, name
, flags
);
1159 add_separate_debug_objfile (objfile
, parent
);
1161 /* We either created a new mapped symbol table, mapped an existing
1162 symbol table file which has not had initial symbol reading
1163 performed, or need to read an unmapped symbol table. */
1166 if (deprecated_pre_add_symbol_hook
)
1167 deprecated_pre_add_symbol_hook (name
);
1170 printf_unfiltered (_("Reading symbols from %s..."), name
);
1172 gdb_flush (gdb_stdout
);
1175 syms_from_objfile (objfile
, addrs
, add_flags
);
1177 /* We now have at least a partial symbol table. Check to see if the
1178 user requested that all symbols be read on initial access via either
1179 the gdb startup command line or on a per symbol file basis. Expand
1180 all partial symbol tables for this objfile if so. */
1182 if ((flags
& OBJF_READNOW
))
1186 printf_unfiltered (_("expanding to full symbols..."));
1188 gdb_flush (gdb_stdout
);
1192 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1195 if (should_print
&& !objfile_has_symbols (objfile
))
1198 printf_unfiltered (_("(no debugging symbols found)..."));
1204 if (deprecated_post_add_symbol_hook
)
1205 deprecated_post_add_symbol_hook ();
1207 printf_unfiltered (_("done.\n"));
1210 /* We print some messages regardless of whether 'from_tty ||
1211 info_verbose' is true, so make sure they go out at the right
1213 gdb_flush (gdb_stdout
);
1215 if (objfile
->sf
== NULL
)
1217 observer_notify_new_objfile (objfile
);
1218 return objfile
; /* No symbols. */
1221 finish_new_objfile (objfile
, add_flags
);
1223 observer_notify_new_objfile (objfile
);
1225 bfd_cache_close_all ();
1229 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1230 see allocate_objfile's definition. */
1233 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1234 symfile_add_flags symfile_flags
,
1235 struct objfile
*objfile
)
1237 struct section_addr_info
*sap
;
1238 struct cleanup
*my_cleanup
;
1240 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1241 because sections of BFD may not match sections of OBJFILE and because
1242 vma may have been modified by tools such as prelink. */
1243 sap
= build_section_addr_info_from_objfile (objfile
);
1244 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1246 symbol_file_add_with_addrs
1247 (bfd
, name
, symfile_flags
, sap
,
1248 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1252 do_cleanups (my_cleanup
);
1255 /* Process the symbol file ABFD, as either the main file or as a
1256 dynamically loaded file.
1257 See symbol_file_add_with_addrs's comments for details. */
1260 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1261 symfile_add_flags add_flags
,
1262 struct section_addr_info
*addrs
,
1263 objfile_flags flags
, struct objfile
*parent
)
1265 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1269 /* Process a symbol file, as either the main file or as a dynamically
1270 loaded file. See symbol_file_add_with_addrs's comments for details. */
1273 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1274 struct section_addr_info
*addrs
, objfile_flags flags
)
1276 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1278 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1282 /* Call symbol_file_add() with default values and update whatever is
1283 affected by the loading of a new main().
1284 Used when the file is supplied in the gdb command line
1285 and by some targets with special loading requirements.
1286 The auxiliary function, symbol_file_add_main_1(), has the flags
1287 argument for the switches that can only be specified in the symbol_file
1291 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1293 symbol_file_add_main_1 (args
, add_flags
, 0);
1297 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1298 objfile_flags flags
)
1300 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1302 symbol_file_add (args
, add_flags
, NULL
, flags
);
1304 /* Getting new symbols may change our opinion about
1305 what is frameless. */
1306 reinit_frame_cache ();
1308 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1309 set_initial_language ();
1313 symbol_file_clear (int from_tty
)
1315 if ((have_full_symbols () || have_partial_symbols ())
1318 ? !query (_("Discard symbol table from `%s'? "),
1319 objfile_name (symfile_objfile
))
1320 : !query (_("Discard symbol table? "))))
1321 error (_("Not confirmed."));
1323 /* solib descriptors may have handles to objfiles. Wipe them before their
1324 objfiles get stale by free_all_objfiles. */
1325 no_shared_libraries (NULL
, from_tty
);
1327 free_all_objfiles ();
1329 gdb_assert (symfile_objfile
== NULL
);
1331 printf_unfiltered (_("No symbol file now.\n"));
1334 /* See symfile.h. */
1336 int separate_debug_file_debug
= 0;
1339 separate_debug_file_exists (const char *name
, unsigned long crc
,
1340 struct objfile
*parent_objfile
)
1342 unsigned long file_crc
;
1344 struct stat parent_stat
, abfd_stat
;
1345 int verified_as_different
;
1347 /* Find a separate debug info file as if symbols would be present in
1348 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1349 section can contain just the basename of PARENT_OBJFILE without any
1350 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1351 the separate debug infos with the same basename can exist. */
1353 if (filename_cmp (name
, objfile_name (parent_objfile
)) == 0)
1356 if (separate_debug_file_debug
)
1357 printf_unfiltered (_(" Trying %s\n"), name
);
1359 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
, gnutarget
, -1));
1364 /* Verify symlinks were not the cause of filename_cmp name difference above.
1366 Some operating systems, e.g. Windows, do not provide a meaningful
1367 st_ino; they always set it to zero. (Windows does provide a
1368 meaningful st_dev.) Files accessed from gdbservers that do not
1369 support the vFile:fstat packet will also have st_ino set to zero.
1370 Do not indicate a duplicate library in either case. While there
1371 is no guarantee that a system that provides meaningful inode
1372 numbers will never set st_ino to zero, this is merely an
1373 optimization, so we do not need to worry about false negatives. */
1375 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1376 && abfd_stat
.st_ino
!= 0
1377 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1379 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1380 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1382 verified_as_different
= 1;
1385 verified_as_different
= 0;
1387 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1392 if (crc
!= file_crc
)
1394 unsigned long parent_crc
;
1396 /* If the files could not be verified as different with
1397 bfd_stat then we need to calculate the parent's CRC
1398 to verify whether the files are different or not. */
1400 if (!verified_as_different
)
1402 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1406 if (verified_as_different
|| parent_crc
!= file_crc
)
1407 warning (_("the debug information found in \"%s\""
1408 " does not match \"%s\" (CRC mismatch).\n"),
1409 name
, objfile_name (parent_objfile
));
1417 char *debug_file_directory
= NULL
;
1419 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1420 struct cmd_list_element
*c
, const char *value
)
1422 fprintf_filtered (file
,
1423 _("The directory where separate debug "
1424 "symbols are searched for is \"%s\".\n"),
1428 #if ! defined (DEBUG_SUBDIRECTORY)
1429 #define DEBUG_SUBDIRECTORY ".debug"
1432 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1433 where the original file resides (may not be the same as
1434 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1435 looking for. CANON_DIR is the "realpath" form of DIR.
1436 DIR must contain a trailing '/'.
1437 Returns the path of the file with separate debug info, of NULL. */
1440 find_separate_debug_file (const char *dir
,
1441 const char *canon_dir
,
1442 const char *debuglink
,
1443 unsigned long crc32
, struct objfile
*objfile
)
1448 VEC (char_ptr
) *debugdir_vec
;
1449 struct cleanup
*back_to
;
1452 if (separate_debug_file_debug
)
1453 printf_unfiltered (_("\nLooking for separate debug info (debug link) for "
1454 "%s\n"), objfile_name (objfile
));
1456 /* Set I to std::max (strlen (canon_dir), strlen (dir)). */
1458 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1459 i
= strlen (canon_dir
);
1462 = (char *) xmalloc (strlen (debug_file_directory
) + 1
1464 + strlen (DEBUG_SUBDIRECTORY
)
1466 + strlen (debuglink
)
1469 /* First try in the same directory as the original file. */
1470 strcpy (debugfile
, dir
);
1471 strcat (debugfile
, debuglink
);
1473 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1476 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1477 strcpy (debugfile
, dir
);
1478 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1479 strcat (debugfile
, "/");
1480 strcat (debugfile
, debuglink
);
1482 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1485 /* Then try in the global debugfile directories.
1487 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1488 cause "/..." lookups. */
1490 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1491 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1493 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1495 strcpy (debugfile
, debugdir
);
1496 strcat (debugfile
, "/");
1497 strcat (debugfile
, dir
);
1498 strcat (debugfile
, debuglink
);
1500 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1502 do_cleanups (back_to
);
1506 /* If the file is in the sysroot, try using its base path in the
1507 global debugfile directory. */
1508 if (canon_dir
!= NULL
1509 && filename_ncmp (canon_dir
, gdb_sysroot
,
1510 strlen (gdb_sysroot
)) == 0
1511 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1513 strcpy (debugfile
, debugdir
);
1514 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1515 strcat (debugfile
, "/");
1516 strcat (debugfile
, debuglink
);
1518 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1520 do_cleanups (back_to
);
1526 do_cleanups (back_to
);
1531 /* Modify PATH to contain only "[/]directory/" part of PATH.
1532 If there were no directory separators in PATH, PATH will be empty
1533 string on return. */
1536 terminate_after_last_dir_separator (char *path
)
1540 /* Strip off the final filename part, leaving the directory name,
1541 followed by a slash. The directory can be relative or absolute. */
1542 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1543 if (IS_DIR_SEPARATOR (path
[i
]))
1546 /* If I is -1 then no directory is present there and DIR will be "". */
1550 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1551 Returns pathname, or NULL. */
1554 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1557 char *dir
, *canon_dir
;
1559 unsigned long crc32
;
1560 struct cleanup
*cleanups
;
1562 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1564 if (debuglink
== NULL
)
1566 /* There's no separate debug info, hence there's no way we could
1567 load it => no warning. */
1571 cleanups
= make_cleanup (xfree
, debuglink
);
1572 dir
= xstrdup (objfile_name (objfile
));
1573 make_cleanup (xfree
, dir
);
1574 terminate_after_last_dir_separator (dir
);
1575 canon_dir
= lrealpath (dir
);
1577 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1581 if (debugfile
== NULL
)
1583 /* For PR gdb/9538, try again with realpath (if different from the
1588 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1589 && S_ISLNK (st_buf
.st_mode
))
1593 symlink_dir
= lrealpath (objfile_name (objfile
));
1594 if (symlink_dir
!= NULL
)
1596 make_cleanup (xfree
, symlink_dir
);
1597 terminate_after_last_dir_separator (symlink_dir
);
1598 if (strcmp (dir
, symlink_dir
) != 0)
1600 /* Different directory, so try using it. */
1601 debugfile
= find_separate_debug_file (symlink_dir
,
1611 do_cleanups (cleanups
);
1615 /* This is the symbol-file command. Read the file, analyze its
1616 symbols, and add a struct symtab to a symtab list. The syntax of
1617 the command is rather bizarre:
1619 1. The function buildargv implements various quoting conventions
1620 which are undocumented and have little or nothing in common with
1621 the way things are quoted (or not quoted) elsewhere in GDB.
1623 2. Options are used, which are not generally used in GDB (perhaps
1624 "set mapped on", "set readnow on" would be better)
1626 3. The order of options matters, which is contrary to GNU
1627 conventions (because it is confusing and inconvenient). */
1630 symbol_file_command (char *args
, int from_tty
)
1636 symbol_file_clear (from_tty
);
1640 objfile_flags flags
= OBJF_USERLOADED
;
1641 symfile_add_flags add_flags
= 0;
1642 struct cleanup
*cleanups
;
1646 add_flags
|= SYMFILE_VERBOSE
;
1648 gdb_argv
built_argv (args
);
1649 for (char *arg
: built_argv
)
1651 if (strcmp (arg
, "-readnow") == 0)
1652 flags
|= OBJF_READNOW
;
1653 else if (*arg
== '-')
1654 error (_("unknown option `%s'"), arg
);
1657 symbol_file_add_main_1 (arg
, add_flags
, flags
);
1663 error (_("no symbol file name was specified"));
1667 /* Set the initial language.
1669 FIXME: A better solution would be to record the language in the
1670 psymtab when reading partial symbols, and then use it (if known) to
1671 set the language. This would be a win for formats that encode the
1672 language in an easily discoverable place, such as DWARF. For
1673 stabs, we can jump through hoops looking for specially named
1674 symbols or try to intuit the language from the specific type of
1675 stabs we find, but we can't do that until later when we read in
1679 set_initial_language (void)
1681 enum language lang
= main_language ();
1683 if (lang
== language_unknown
)
1685 char *name
= main_name ();
1686 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1689 lang
= SYMBOL_LANGUAGE (sym
);
1692 if (lang
== language_unknown
)
1694 /* Make C the default language */
1698 set_language (lang
);
1699 expected_language
= current_language
; /* Don't warn the user. */
1702 /* Open the file specified by NAME and hand it off to BFD for
1703 preliminary analysis. Return a newly initialized bfd *, which
1704 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1705 absolute). In case of trouble, error() is called. */
1708 symfile_bfd_open (const char *name
)
1711 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
1713 if (!is_target_filename (name
))
1715 char *absolute_name
;
1717 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1719 /* Look down path for it, allocate 2nd new malloc'd copy. */
1720 desc
= openp (getenv ("PATH"),
1721 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1722 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1723 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1726 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1728 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1729 desc
= openp (getenv ("PATH"),
1730 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1731 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1735 perror_with_name (expanded_name
.get ());
1737 make_cleanup (xfree
, absolute_name
);
1738 name
= absolute_name
;
1741 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1742 if (sym_bfd
== NULL
)
1743 error (_("`%s': can't open to read symbols: %s."), name
,
1744 bfd_errmsg (bfd_get_error ()));
1746 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1747 bfd_set_cacheable (sym_bfd
.get (), 1);
1749 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1750 error (_("`%s': can't read symbols: %s."), name
,
1751 bfd_errmsg (bfd_get_error ()));
1753 do_cleanups (back_to
);
1758 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1759 the section was not found. */
1762 get_section_index (struct objfile
*objfile
, const char *section_name
)
1764 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1772 /* Link SF into the global symtab_fns list.
1773 FLAVOUR is the file format that SF handles.
1774 Called on startup by the _initialize routine in each object file format
1775 reader, to register information about each format the reader is prepared
1779 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1781 registered_sym_fns fns
= { flavour
, sf
};
1783 VEC_safe_push (registered_sym_fns
, symtab_fns
, &fns
);
1786 /* Initialize OBJFILE to read symbols from its associated BFD. It
1787 either returns or calls error(). The result is an initialized
1788 struct sym_fns in the objfile structure, that contains cached
1789 information about the symbol file. */
1791 static const struct sym_fns
*
1792 find_sym_fns (bfd
*abfd
)
1794 registered_sym_fns
*rsf
;
1795 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1798 if (our_flavour
== bfd_target_srec_flavour
1799 || our_flavour
== bfd_target_ihex_flavour
1800 || our_flavour
== bfd_target_tekhex_flavour
)
1801 return NULL
; /* No symbols. */
1803 for (i
= 0; VEC_iterate (registered_sym_fns
, symtab_fns
, i
, rsf
); ++i
)
1804 if (our_flavour
== rsf
->sym_flavour
)
1805 return rsf
->sym_fns
;
1807 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1808 bfd_get_target (abfd
));
1812 /* This function runs the load command of our current target. */
1815 load_command (char *arg
, int from_tty
)
1817 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1821 /* The user might be reloading because the binary has changed. Take
1822 this opportunity to check. */
1823 reopen_exec_file ();
1831 parg
= arg
= get_exec_file (1);
1833 /* Count how many \ " ' tab space there are in the name. */
1834 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1842 /* We need to quote this string so buildargv can pull it apart. */
1843 char *temp
= (char *) xmalloc (strlen (arg
) + count
+ 1 );
1847 make_cleanup (xfree
, temp
);
1850 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1852 strncpy (ptemp
, prev
, parg
- prev
);
1853 ptemp
+= parg
- prev
;
1857 strcpy (ptemp
, prev
);
1863 target_load (arg
, from_tty
);
1865 /* After re-loading the executable, we don't really know which
1866 overlays are mapped any more. */
1867 overlay_cache_invalid
= 1;
1869 do_cleanups (cleanup
);
1872 /* This version of "load" should be usable for any target. Currently
1873 it is just used for remote targets, not inftarg.c or core files,
1874 on the theory that only in that case is it useful.
1876 Avoiding xmodem and the like seems like a win (a) because we don't have
1877 to worry about finding it, and (b) On VMS, fork() is very slow and so
1878 we don't want to run a subprocess. On the other hand, I'm not sure how
1879 performance compares. */
1881 static int validate_download
= 0;
1883 /* Callback service function for generic_load (bfd_map_over_sections). */
1886 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1888 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1890 *sum
+= bfd_get_section_size (asec
);
1893 /* Opaque data for load_section_callback. */
1894 struct load_section_data
{
1895 CORE_ADDR load_offset
;
1896 struct load_progress_data
*progress_data
;
1897 VEC(memory_write_request_s
) *requests
;
1900 /* Opaque data for load_progress. */
1901 struct load_progress_data
{
1902 /* Cumulative data. */
1903 unsigned long write_count
;
1904 unsigned long data_count
;
1905 bfd_size_type total_size
;
1908 /* Opaque data for load_progress for a single section. */
1909 struct load_progress_section_data
{
1910 struct load_progress_data
*cumulative
;
1912 /* Per-section data. */
1913 const char *section_name
;
1914 ULONGEST section_sent
;
1915 ULONGEST section_size
;
1920 /* Target write callback routine for progress reporting. */
1923 load_progress (ULONGEST bytes
, void *untyped_arg
)
1925 struct load_progress_section_data
*args
1926 = (struct load_progress_section_data
*) untyped_arg
;
1927 struct load_progress_data
*totals
;
1930 /* Writing padding data. No easy way to get at the cumulative
1931 stats, so just ignore this. */
1934 totals
= args
->cumulative
;
1936 if (bytes
== 0 && args
->section_sent
== 0)
1938 /* The write is just starting. Let the user know we've started
1940 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1942 hex_string (args
->section_size
),
1943 paddress (target_gdbarch (), args
->lma
));
1947 if (validate_download
)
1949 /* Broken memories and broken monitors manifest themselves here
1950 when bring new computers to life. This doubles already slow
1952 /* NOTE: cagney/1999-10-18: A more efficient implementation
1953 might add a verify_memory() method to the target vector and
1954 then use that. remote.c could implement that method using
1955 the ``qCRC'' packet. */
1956 gdb_byte
*check
= (gdb_byte
*) xmalloc (bytes
);
1957 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1959 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1960 error (_("Download verify read failed at %s"),
1961 paddress (target_gdbarch (), args
->lma
));
1962 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1963 error (_("Download verify compare failed at %s"),
1964 paddress (target_gdbarch (), args
->lma
));
1965 do_cleanups (verify_cleanups
);
1967 totals
->data_count
+= bytes
;
1969 args
->buffer
+= bytes
;
1970 totals
->write_count
+= 1;
1971 args
->section_sent
+= bytes
;
1972 if (check_quit_flag ()
1973 || (deprecated_ui_load_progress_hook
!= NULL
1974 && deprecated_ui_load_progress_hook (args
->section_name
,
1975 args
->section_sent
)))
1976 error (_("Canceled the download"));
1978 if (deprecated_show_load_progress
!= NULL
)
1979 deprecated_show_load_progress (args
->section_name
,
1983 totals
->total_size
);
1986 /* Callback service function for generic_load (bfd_map_over_sections). */
1989 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1991 struct memory_write_request
*new_request
;
1992 struct load_section_data
*args
= (struct load_section_data
*) data
;
1993 struct load_progress_section_data
*section_data
;
1994 bfd_size_type size
= bfd_get_section_size (asec
);
1996 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1998 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
2004 new_request
= VEC_safe_push (memory_write_request_s
,
2005 args
->requests
, NULL
);
2006 memset (new_request
, 0, sizeof (struct memory_write_request
));
2007 section_data
= XCNEW (struct load_progress_section_data
);
2008 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
2009 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
2011 new_request
->data
= (gdb_byte
*) xmalloc (size
);
2012 new_request
->baton
= section_data
;
2014 buffer
= new_request
->data
;
2016 section_data
->cumulative
= args
->progress_data
;
2017 section_data
->section_name
= sect_name
;
2018 section_data
->section_size
= size
;
2019 section_data
->lma
= new_request
->begin
;
2020 section_data
->buffer
= buffer
;
2022 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2025 /* Clean up an entire memory request vector, including load
2026 data and progress records. */
2029 clear_memory_write_data (void *arg
)
2031 VEC(memory_write_request_s
) **vec_p
= (VEC(memory_write_request_s
) **) arg
;
2032 VEC(memory_write_request_s
) *vec
= *vec_p
;
2034 struct memory_write_request
*mr
;
2036 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2041 VEC_free (memory_write_request_s
, vec
);
2044 static void print_transfer_performance (struct ui_file
*stream
,
2045 unsigned long data_count
,
2046 unsigned long write_count
,
2047 std::chrono::steady_clock::duration d
);
2050 generic_load (const char *args
, int from_tty
)
2052 struct cleanup
*old_cleanups
;
2053 struct load_section_data cbdata
;
2054 struct load_progress_data total_progress
;
2055 struct ui_out
*uiout
= current_uiout
;
2059 memset (&cbdata
, 0, sizeof (cbdata
));
2060 memset (&total_progress
, 0, sizeof (total_progress
));
2061 cbdata
.progress_data
= &total_progress
;
2063 old_cleanups
= make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2066 error_no_arg (_("file to load"));
2068 gdb_argv
argv (args
);
2070 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2072 if (argv
[1] != NULL
)
2076 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2078 /* If the last word was not a valid number then
2079 treat it as a file name with spaces in. */
2080 if (argv
[1] == endptr
)
2081 error (_("Invalid download offset:%s."), argv
[1]);
2083 if (argv
[2] != NULL
)
2084 error (_("Too many parameters."));
2087 /* Open the file for loading. */
2088 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
2089 if (loadfile_bfd
== NULL
)
2090 perror_with_name (filename
.get ());
2092 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2094 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2095 bfd_errmsg (bfd_get_error ()));
2098 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
2099 (void *) &total_progress
.total_size
);
2101 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
2103 using namespace std::chrono
;
2105 steady_clock::time_point start_time
= steady_clock::now ();
2107 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2108 load_progress
) != 0)
2109 error (_("Load failed"));
2111 steady_clock::time_point end_time
= steady_clock::now ();
2113 entry
= bfd_get_start_address (loadfile_bfd
.get ());
2114 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2115 uiout
->text ("Start address ");
2116 uiout
->field_fmt ("address", "%s", paddress (target_gdbarch (), entry
));
2117 uiout
->text (", load size ");
2118 uiout
->field_fmt ("load-size", "%lu", total_progress
.data_count
);
2120 regcache_write_pc (get_current_regcache (), entry
);
2122 /* Reset breakpoints, now that we have changed the load image. For
2123 instance, breakpoints may have been set (or reset, by
2124 post_create_inferior) while connected to the target but before we
2125 loaded the program. In that case, the prologue analyzer could
2126 have read instructions from the target to find the right
2127 breakpoint locations. Loading has changed the contents of that
2130 breakpoint_re_set ();
2132 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2133 total_progress
.write_count
,
2134 end_time
- start_time
);
2136 do_cleanups (old_cleanups
);
2139 /* Report on STREAM the performance of a memory transfer operation,
2140 such as 'load'. DATA_COUNT is the number of bytes transferred.
2141 WRITE_COUNT is the number of separate write operations, or 0, if
2142 that information is not available. TIME is how long the operation
2146 print_transfer_performance (struct ui_file
*stream
,
2147 unsigned long data_count
,
2148 unsigned long write_count
,
2149 std::chrono::steady_clock::duration time
)
2151 using namespace std::chrono
;
2152 struct ui_out
*uiout
= current_uiout
;
2154 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2156 uiout
->text ("Transfer rate: ");
2157 if (ms
.count () > 0)
2159 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2161 if (uiout
->is_mi_like_p ())
2163 uiout
->field_fmt ("transfer-rate", "%lu", rate
* 8);
2164 uiout
->text (" bits/sec");
2166 else if (rate
< 1024)
2168 uiout
->field_fmt ("transfer-rate", "%lu", rate
);
2169 uiout
->text (" bytes/sec");
2173 uiout
->field_fmt ("transfer-rate", "%lu", rate
/ 1024);
2174 uiout
->text (" KB/sec");
2179 uiout
->field_fmt ("transferred-bits", "%lu", (data_count
* 8));
2180 uiout
->text (" bits in <1 sec");
2182 if (write_count
> 0)
2185 uiout
->field_fmt ("write-rate", "%lu", data_count
/ write_count
);
2186 uiout
->text (" bytes/write");
2188 uiout
->text (".\n");
2191 /* This function allows the addition of incrementally linked object files.
2192 It does not modify any state in the target, only in the debugger. */
2193 /* Note: ezannoni 2000-04-13 This function/command used to have a
2194 special case syntax for the rombug target (Rombug is the boot
2195 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2196 rombug case, the user doesn't need to supply a text address,
2197 instead a call to target_link() (in target.c) would supply the
2198 value to use. We are now discontinuing this type of ad hoc syntax. */
2201 add_symbol_file_command (char *args
, int from_tty
)
2203 struct gdbarch
*gdbarch
= get_current_arch ();
2204 gdb::unique_xmalloc_ptr
<char> filename
;
2208 int expecting_sec_name
= 0;
2209 int expecting_sec_addr
= 0;
2210 struct objfile
*objf
;
2211 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2212 symfile_add_flags add_flags
= 0;
2215 add_flags
|= SYMFILE_VERBOSE
;
2223 struct section_addr_info
*section_addrs
;
2224 std::vector
<sect_opt
> sect_opts
;
2225 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2230 error (_("add-symbol-file takes a file name and an address"));
2232 gdb_argv
argv (args
);
2234 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2236 /* Process the argument. */
2239 /* The first argument is the file name. */
2240 filename
.reset (tilde_expand (arg
));
2242 else if (argcnt
== 1)
2244 /* The second argument is always the text address at which
2245 to load the program. */
2246 sect_opt sect
= { ".text", arg
};
2247 sect_opts
.push_back (sect
);
2251 /* It's an option (starting with '-') or it's an argument
2253 if (expecting_sec_name
)
2255 sect_opt sect
= { arg
, NULL
};
2256 sect_opts
.push_back (sect
);
2257 expecting_sec_name
= 0;
2259 else if (expecting_sec_addr
)
2261 sect_opts
.back ().value
= arg
;
2262 expecting_sec_addr
= 0;
2264 else if (strcmp (arg
, "-readnow") == 0)
2265 flags
|= OBJF_READNOW
;
2266 else if (strcmp (arg
, "-s") == 0)
2268 expecting_sec_name
= 1;
2269 expecting_sec_addr
= 1;
2272 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2273 " [-readnow] [-s <secname> <addr>]*"));
2277 /* This command takes at least two arguments. The first one is a
2278 filename, and the second is the address where this file has been
2279 loaded. Abort now if this address hasn't been provided by the
2281 if (sect_opts
.empty ())
2282 error (_("The address where %s has been loaded is missing"),
2285 /* Print the prompt for the query below. And save the arguments into
2286 a sect_addr_info structure to be passed around to other
2287 functions. We have to split this up into separate print
2288 statements because hex_string returns a local static
2291 printf_unfiltered (_("add symbol table from file \"%s\" at\n"),
2293 section_addrs
= alloc_section_addr_info (sect_opts
.size ());
2294 make_cleanup (xfree
, section_addrs
);
2295 for (sect_opt
§
: sect_opts
)
2298 const char *val
= sect
.value
;
2299 const char *sec
= sect
.name
;
2301 addr
= parse_and_eval_address (val
);
2303 /* Here we store the section offsets in the order they were
2304 entered on the command line. */
2305 section_addrs
->other
[sec_num
].name
= (char *) sec
;
2306 section_addrs
->other
[sec_num
].addr
= addr
;
2307 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2308 paddress (gdbarch
, addr
));
2311 /* The object's sections are initialized when a
2312 call is made to build_objfile_section_table (objfile).
2313 This happens in reread_symbols.
2314 At this point, we don't know what file type this is,
2315 so we can't determine what section names are valid. */
2317 section_addrs
->num_sections
= sec_num
;
2319 if (from_tty
&& (!query ("%s", "")))
2320 error (_("Not confirmed."));
2322 objf
= symbol_file_add (filename
.get (), add_flags
, section_addrs
, flags
);
2324 add_target_sections_of_objfile (objf
);
2326 /* Getting new symbols may change our opinion about what is
2328 reinit_frame_cache ();
2329 do_cleanups (my_cleanups
);
2333 /* This function removes a symbol file that was added via add-symbol-file. */
2336 remove_symbol_file_command (char *args
, int from_tty
)
2338 struct objfile
*objf
= NULL
;
2339 struct program_space
*pspace
= current_program_space
;
2344 error (_("remove-symbol-file: no symbol file provided"));
2346 gdb_argv
argv (args
);
2348 if (strcmp (argv
[0], "-a") == 0)
2350 /* Interpret the next argument as an address. */
2353 if (argv
[1] == NULL
)
2354 error (_("Missing address argument"));
2356 if (argv
[2] != NULL
)
2357 error (_("Junk after %s"), argv
[1]);
2359 addr
= parse_and_eval_address (argv
[1]);
2363 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2364 && (objf
->flags
& OBJF_SHARED
) != 0
2365 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2369 else if (argv
[0] != NULL
)
2371 /* Interpret the current argument as a file name. */
2373 if (argv
[1] != NULL
)
2374 error (_("Junk after %s"), argv
[0]);
2376 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2380 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2381 && (objf
->flags
& OBJF_SHARED
) != 0
2382 && objf
->pspace
== pspace
2383 && filename_cmp (filename
.get (), objfile_name (objf
)) == 0)
2389 error (_("No symbol file found"));
2392 && !query (_("Remove symbol table from file \"%s\"? "),
2393 objfile_name (objf
)))
2394 error (_("Not confirmed."));
2396 free_objfile (objf
);
2397 clear_symtab_users (0);
2400 /* Re-read symbols if a symbol-file has changed. */
2403 reread_symbols (void)
2405 struct objfile
*objfile
;
2407 struct stat new_statbuf
;
2409 std::vector
<struct objfile
*> new_objfiles
;
2411 /* With the addition of shared libraries, this should be modified,
2412 the load time should be saved in the partial symbol tables, since
2413 different tables may come from different source files. FIXME.
2414 This routine should then walk down each partial symbol table
2415 and see if the symbol table that it originates from has been changed. */
2417 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2419 if (objfile
->obfd
== NULL
)
2422 /* Separate debug objfiles are handled in the main objfile. */
2423 if (objfile
->separate_debug_objfile_backlink
)
2426 /* If this object is from an archive (what you usually create with
2427 `ar', often called a `static library' on most systems, though
2428 a `shared library' on AIX is also an archive), then you should
2429 stat on the archive name, not member name. */
2430 if (objfile
->obfd
->my_archive
)
2431 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2433 res
= stat (objfile_name (objfile
), &new_statbuf
);
2436 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2437 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2438 objfile_name (objfile
));
2441 new_modtime
= new_statbuf
.st_mtime
;
2442 if (new_modtime
!= objfile
->mtime
)
2444 struct cleanup
*old_cleanups
;
2445 struct section_offsets
*offsets
;
2447 char *original_name
;
2449 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2450 objfile_name (objfile
));
2452 /* There are various functions like symbol_file_add,
2453 symfile_bfd_open, syms_from_objfile, etc., which might
2454 appear to do what we want. But they have various other
2455 effects which we *don't* want. So we just do stuff
2456 ourselves. We don't worry about mapped files (for one thing,
2457 any mapped file will be out of date). */
2459 /* If we get an error, blow away this objfile (not sure if
2460 that is the correct response for things like shared
2462 old_cleanups
= make_cleanup_free_objfile (objfile
);
2463 /* We need to do this whenever any symbols go away. */
2464 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2466 if (exec_bfd
!= NULL
2467 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2468 bfd_get_filename (exec_bfd
)) == 0)
2470 /* Reload EXEC_BFD without asking anything. */
2472 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2475 /* Keep the calls order approx. the same as in free_objfile. */
2477 /* Free the separate debug objfiles. It will be
2478 automatically recreated by sym_read. */
2479 free_objfile_separate_debug (objfile
);
2481 /* Remove any references to this objfile in the global
2483 preserve_values (objfile
);
2485 /* Nuke all the state that we will re-read. Much of the following
2486 code which sets things to NULL really is necessary to tell
2487 other parts of GDB that there is nothing currently there.
2489 Try to keep the freeing order compatible with free_objfile. */
2491 if (objfile
->sf
!= NULL
)
2493 (*objfile
->sf
->sym_finish
) (objfile
);
2496 clear_objfile_data (objfile
);
2498 /* Clean up any state BFD has sitting around. */
2500 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2501 char *obfd_filename
;
2503 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2504 /* Open the new BFD before freeing the old one, so that
2505 the filename remains live. */
2506 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2507 objfile
->obfd
= temp
.release ();
2508 if (objfile
->obfd
== NULL
)
2509 error (_("Can't open %s to read symbols."), obfd_filename
);
2512 original_name
= xstrdup (objfile
->original_name
);
2513 make_cleanup (xfree
, original_name
);
2515 /* bfd_openr sets cacheable to true, which is what we want. */
2516 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2517 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2518 bfd_errmsg (bfd_get_error ()));
2520 /* Save the offsets, we will nuke them with the rest of the
2522 num_offsets
= objfile
->num_sections
;
2523 offsets
= ((struct section_offsets
*)
2524 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2525 memcpy (offsets
, objfile
->section_offsets
,
2526 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2528 /* FIXME: Do we have to free a whole linked list, or is this
2530 if (objfile
->global_psymbols
.list
)
2531 xfree (objfile
->global_psymbols
.list
);
2532 memset (&objfile
->global_psymbols
, 0,
2533 sizeof (objfile
->global_psymbols
));
2534 if (objfile
->static_psymbols
.list
)
2535 xfree (objfile
->static_psymbols
.list
);
2536 memset (&objfile
->static_psymbols
, 0,
2537 sizeof (objfile
->static_psymbols
));
2539 /* Free the obstacks for non-reusable objfiles. */
2540 psymbol_bcache_free (objfile
->psymbol_cache
);
2541 objfile
->psymbol_cache
= psymbol_bcache_init ();
2543 /* NB: after this call to obstack_free, objfiles_changed
2544 will need to be called (see discussion below). */
2545 obstack_free (&objfile
->objfile_obstack
, 0);
2546 objfile
->sections
= NULL
;
2547 objfile
->compunit_symtabs
= NULL
;
2548 objfile
->psymtabs
= NULL
;
2549 objfile
->psymtabs_addrmap
= NULL
;
2550 objfile
->free_psymtabs
= NULL
;
2551 objfile
->template_symbols
= NULL
;
2553 /* obstack_init also initializes the obstack so it is
2554 empty. We could use obstack_specify_allocation but
2555 gdb_obstack.h specifies the alloc/dealloc functions. */
2556 obstack_init (&objfile
->objfile_obstack
);
2558 /* set_objfile_per_bfd potentially allocates the per-bfd
2559 data on the objfile's obstack (if sharing data across
2560 multiple users is not possible), so it's important to
2561 do it *after* the obstack has been initialized. */
2562 set_objfile_per_bfd (objfile
);
2564 objfile
->original_name
2565 = (char *) obstack_copy0 (&objfile
->objfile_obstack
, original_name
,
2566 strlen (original_name
));
2568 /* Reset the sym_fns pointer. The ELF reader can change it
2569 based on whether .gdb_index is present, and we need it to
2570 start over. PR symtab/15885 */
2571 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2573 build_objfile_section_table (objfile
);
2574 terminate_minimal_symbol_table (objfile
);
2576 /* We use the same section offsets as from last time. I'm not
2577 sure whether that is always correct for shared libraries. */
2578 objfile
->section_offsets
= (struct section_offsets
*)
2579 obstack_alloc (&objfile
->objfile_obstack
,
2580 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2581 memcpy (objfile
->section_offsets
, offsets
,
2582 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2583 objfile
->num_sections
= num_offsets
;
2585 /* What the hell is sym_new_init for, anyway? The concept of
2586 distinguishing between the main file and additional files
2587 in this way seems rather dubious. */
2588 if (objfile
== symfile_objfile
)
2590 (*objfile
->sf
->sym_new_init
) (objfile
);
2593 (*objfile
->sf
->sym_init
) (objfile
);
2594 clear_complaints (&symfile_complaints
, 1, 1);
2596 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2598 /* We are about to read new symbols and potentially also
2599 DWARF information. Some targets may want to pass addresses
2600 read from DWARF DIE's through an adjustment function before
2601 saving them, like MIPS, which may call into
2602 "find_pc_section". When called, that function will make
2603 use of per-objfile program space data.
2605 Since we discarded our section information above, we have
2606 dangling pointers in the per-objfile program space data
2607 structure. Force GDB to update the section mapping
2608 information by letting it know the objfile has changed,
2609 making the dangling pointers point to correct data
2612 objfiles_changed ();
2614 read_symbols (objfile
, 0);
2616 if (!objfile_has_symbols (objfile
))
2619 printf_unfiltered (_("(no debugging symbols found)\n"));
2623 /* We're done reading the symbol file; finish off complaints. */
2624 clear_complaints (&symfile_complaints
, 0, 1);
2626 /* Getting new symbols may change our opinion about what is
2629 reinit_frame_cache ();
2631 /* Discard cleanups as symbol reading was successful. */
2632 discard_cleanups (old_cleanups
);
2634 /* If the mtime has changed between the time we set new_modtime
2635 and now, we *want* this to be out of date, so don't call stat
2637 objfile
->mtime
= new_modtime
;
2638 init_entry_point_info (objfile
);
2640 new_objfiles
.push_back (objfile
);
2644 if (!new_objfiles
.empty ())
2646 clear_symtab_users (0);
2648 /* clear_objfile_data for each objfile was called before freeing it and
2649 observer_notify_new_objfile (NULL) has been called by
2650 clear_symtab_users above. Notify the new files now. */
2651 for (auto iter
: new_objfiles
)
2652 observer_notify_new_objfile (iter
);
2654 /* At least one objfile has changed, so we can consider that
2655 the executable we're debugging has changed too. */
2656 observer_notify_executable_changed ();
2665 } filename_language
;
2667 DEF_VEC_O (filename_language
);
2669 static VEC (filename_language
) *filename_language_table
;
2671 /* See symfile.h. */
2674 add_filename_language (const char *ext
, enum language lang
)
2676 filename_language entry
;
2678 entry
.ext
= xstrdup (ext
);
2681 VEC_safe_push (filename_language
, filename_language_table
, &entry
);
2684 static char *ext_args
;
2686 show_ext_args (struct ui_file
*file
, int from_tty
,
2687 struct cmd_list_element
*c
, const char *value
)
2689 fprintf_filtered (file
,
2690 _("Mapping between filename extension "
2691 "and source language is \"%s\".\n"),
2696 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2699 char *cp
= ext_args
;
2701 filename_language
*entry
;
2703 /* First arg is filename extension, starting with '.' */
2705 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2707 /* Find end of first arg. */
2708 while (*cp
&& !isspace (*cp
))
2712 error (_("'%s': two arguments required -- "
2713 "filename extension and language"),
2716 /* Null-terminate first arg. */
2719 /* Find beginning of second arg, which should be a source language. */
2720 cp
= skip_spaces (cp
);
2723 error (_("'%s': two arguments required -- "
2724 "filename extension and language"),
2727 /* Lookup the language from among those we know. */
2728 lang
= language_enum (cp
);
2730 /* Now lookup the filename extension: do we already know it? */
2732 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2735 if (0 == strcmp (ext_args
, entry
->ext
))
2741 /* New file extension. */
2742 add_filename_language (ext_args
, lang
);
2746 /* Redefining a previously known filename extension. */
2749 /* query ("Really make files of type %s '%s'?", */
2750 /* ext_args, language_str (lang)); */
2753 entry
->ext
= xstrdup (ext_args
);
2759 info_ext_lang_command (char *args
, int from_tty
)
2762 filename_language
*entry
;
2764 printf_filtered (_("Filename extensions and the languages they represent:"));
2765 printf_filtered ("\n\n");
2767 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2769 printf_filtered ("\t%s\t- %s\n", entry
->ext
, language_str (entry
->lang
));
2773 deduce_language_from_filename (const char *filename
)
2778 if (filename
!= NULL
)
2779 if ((cp
= strrchr (filename
, '.')) != NULL
)
2781 filename_language
*entry
;
2784 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2786 if (strcmp (cp
, entry
->ext
) == 0)
2790 return language_unknown
;
2793 /* Allocate and initialize a new symbol table.
2794 CUST is from the result of allocate_compunit_symtab. */
2797 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2799 struct objfile
*objfile
= cust
->objfile
;
2800 struct symtab
*symtab
2801 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2804 = (const char *) bcache (filename
, strlen (filename
) + 1,
2805 objfile
->per_bfd
->filename_cache
);
2806 symtab
->fullname
= NULL
;
2807 symtab
->language
= deduce_language_from_filename (filename
);
2809 /* This can be very verbose with lots of headers.
2810 Only print at higher debug levels. */
2811 if (symtab_create_debug
>= 2)
2813 /* Be a bit clever with debugging messages, and don't print objfile
2814 every time, only when it changes. */
2815 static char *last_objfile_name
= NULL
;
2817 if (last_objfile_name
== NULL
2818 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2820 xfree (last_objfile_name
);
2821 last_objfile_name
= xstrdup (objfile_name (objfile
));
2822 fprintf_unfiltered (gdb_stdlog
,
2823 "Creating one or more symtabs for objfile %s ...\n",
2826 fprintf_unfiltered (gdb_stdlog
,
2827 "Created symtab %s for module %s.\n",
2828 host_address_to_string (symtab
), filename
);
2831 /* Add it to CUST's list of symtabs. */
2832 if (cust
->filetabs
== NULL
)
2834 cust
->filetabs
= symtab
;
2835 cust
->last_filetab
= symtab
;
2839 cust
->last_filetab
->next
= symtab
;
2840 cust
->last_filetab
= symtab
;
2843 /* Backlink to the containing compunit symtab. */
2844 symtab
->compunit_symtab
= cust
;
2849 /* Allocate and initialize a new compunit.
2850 NAME is the name of the main source file, if there is one, or some
2851 descriptive text if there are no source files. */
2853 struct compunit_symtab
*
2854 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2856 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2857 struct compunit_symtab
);
2858 const char *saved_name
;
2860 cu
->objfile
= objfile
;
2862 /* The name we record here is only for display/debugging purposes.
2863 Just save the basename to avoid path issues (too long for display,
2864 relative vs absolute, etc.). */
2865 saved_name
= lbasename (name
);
2867 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2868 strlen (saved_name
));
2870 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2872 if (symtab_create_debug
)
2874 fprintf_unfiltered (gdb_stdlog
,
2875 "Created compunit symtab %s for %s.\n",
2876 host_address_to_string (cu
),
2883 /* Hook CU to the objfile it comes from. */
2886 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2888 cu
->next
= cu
->objfile
->compunit_symtabs
;
2889 cu
->objfile
->compunit_symtabs
= cu
;
2893 /* Reset all data structures in gdb which may contain references to
2894 symbol table data. */
2897 clear_symtab_users (symfile_add_flags add_flags
)
2899 /* Someday, we should do better than this, by only blowing away
2900 the things that really need to be blown. */
2902 /* Clear the "current" symtab first, because it is no longer valid.
2903 breakpoint_re_set may try to access the current symtab. */
2904 clear_current_source_symtab_and_line ();
2907 clear_last_displayed_sal ();
2908 clear_pc_function_cache ();
2909 observer_notify_new_objfile (NULL
);
2911 /* Clear globals which might have pointed into a removed objfile.
2912 FIXME: It's not clear which of these are supposed to persist
2913 between expressions and which ought to be reset each time. */
2914 expression_context_block
= NULL
;
2915 innermost_block
= NULL
;
2917 /* Varobj may refer to old symbols, perform a cleanup. */
2918 varobj_invalidate ();
2920 /* Now that the various caches have been cleared, we can re_set
2921 our breakpoints without risking it using stale data. */
2922 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2923 breakpoint_re_set ();
2927 clear_symtab_users_cleanup (void *ignore
)
2929 clear_symtab_users (0);
2933 The following code implements an abstraction for debugging overlay sections.
2935 The target model is as follows:
2936 1) The gnu linker will permit multiple sections to be mapped into the
2937 same VMA, each with its own unique LMA (or load address).
2938 2) It is assumed that some runtime mechanism exists for mapping the
2939 sections, one by one, from the load address into the VMA address.
2940 3) This code provides a mechanism for gdb to keep track of which
2941 sections should be considered to be mapped from the VMA to the LMA.
2942 This information is used for symbol lookup, and memory read/write.
2943 For instance, if a section has been mapped then its contents
2944 should be read from the VMA, otherwise from the LMA.
2946 Two levels of debugger support for overlays are available. One is
2947 "manual", in which the debugger relies on the user to tell it which
2948 overlays are currently mapped. This level of support is
2949 implemented entirely in the core debugger, and the information about
2950 whether a section is mapped is kept in the objfile->obj_section table.
2952 The second level of support is "automatic", and is only available if
2953 the target-specific code provides functionality to read the target's
2954 overlay mapping table, and translate its contents for the debugger
2955 (by updating the mapped state information in the obj_section tables).
2957 The interface is as follows:
2959 overlay map <name> -- tell gdb to consider this section mapped
2960 overlay unmap <name> -- tell gdb to consider this section unmapped
2961 overlay list -- list the sections that GDB thinks are mapped
2962 overlay read-target -- get the target's state of what's mapped
2963 overlay off/manual/auto -- set overlay debugging state
2964 Functional interface:
2965 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2966 section, return that section.
2967 find_pc_overlay(pc): find any overlay section that contains
2968 the pc, either in its VMA or its LMA
2969 section_is_mapped(sect): true if overlay is marked as mapped
2970 section_is_overlay(sect): true if section's VMA != LMA
2971 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2972 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2973 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2974 overlay_mapped_address(...): map an address from section's LMA to VMA
2975 overlay_unmapped_address(...): map an address from section's VMA to LMA
2976 symbol_overlayed_address(...): Return a "current" address for symbol:
2977 either in VMA or LMA depending on whether
2978 the symbol's section is currently mapped. */
2980 /* Overlay debugging state: */
2982 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2983 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2985 /* Function: section_is_overlay (SECTION)
2986 Returns true if SECTION has VMA not equal to LMA, ie.
2987 SECTION is loaded at an address different from where it will "run". */
2990 section_is_overlay (struct obj_section
*section
)
2992 if (overlay_debugging
&& section
)
2994 bfd
*abfd
= section
->objfile
->obfd
;
2995 asection
*bfd_section
= section
->the_bfd_section
;
2997 if (bfd_section_lma (abfd
, bfd_section
) != 0
2998 && bfd_section_lma (abfd
, bfd_section
)
2999 != bfd_section_vma (abfd
, bfd_section
))
3006 /* Function: overlay_invalidate_all (void)
3007 Invalidate the mapped state of all overlay sections (mark it as stale). */
3010 overlay_invalidate_all (void)
3012 struct objfile
*objfile
;
3013 struct obj_section
*sect
;
3015 ALL_OBJSECTIONS (objfile
, sect
)
3016 if (section_is_overlay (sect
))
3017 sect
->ovly_mapped
= -1;
3020 /* Function: section_is_mapped (SECTION)
3021 Returns true if section is an overlay, and is currently mapped.
3023 Access to the ovly_mapped flag is restricted to this function, so
3024 that we can do automatic update. If the global flag
3025 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3026 overlay_invalidate_all. If the mapped state of the particular
3027 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3030 section_is_mapped (struct obj_section
*osect
)
3032 struct gdbarch
*gdbarch
;
3034 if (osect
== 0 || !section_is_overlay (osect
))
3037 switch (overlay_debugging
)
3041 return 0; /* overlay debugging off */
3042 case ovly_auto
: /* overlay debugging automatic */
3043 /* Unles there is a gdbarch_overlay_update function,
3044 there's really nothing useful to do here (can't really go auto). */
3045 gdbarch
= get_objfile_arch (osect
->objfile
);
3046 if (gdbarch_overlay_update_p (gdbarch
))
3048 if (overlay_cache_invalid
)
3050 overlay_invalidate_all ();
3051 overlay_cache_invalid
= 0;
3053 if (osect
->ovly_mapped
== -1)
3054 gdbarch_overlay_update (gdbarch
, osect
);
3056 /* fall thru to manual case */
3057 case ovly_on
: /* overlay debugging manual */
3058 return osect
->ovly_mapped
== 1;
3062 /* Function: pc_in_unmapped_range
3063 If PC falls into the lma range of SECTION, return true, else false. */
3066 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3068 if (section_is_overlay (section
))
3070 bfd
*abfd
= section
->objfile
->obfd
;
3071 asection
*bfd_section
= section
->the_bfd_section
;
3073 /* We assume the LMA is relocated by the same offset as the VMA. */
3074 bfd_vma size
= bfd_get_section_size (bfd_section
);
3075 CORE_ADDR offset
= obj_section_offset (section
);
3077 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3078 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3085 /* Function: pc_in_mapped_range
3086 If PC falls into the vma range of SECTION, return true, else false. */
3089 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3091 if (section_is_overlay (section
))
3093 if (obj_section_addr (section
) <= pc
3094 && pc
< obj_section_endaddr (section
))
3101 /* Return true if the mapped ranges of sections A and B overlap, false
3105 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3107 CORE_ADDR a_start
= obj_section_addr (a
);
3108 CORE_ADDR a_end
= obj_section_endaddr (a
);
3109 CORE_ADDR b_start
= obj_section_addr (b
);
3110 CORE_ADDR b_end
= obj_section_endaddr (b
);
3112 return (a_start
< b_end
&& b_start
< a_end
);
3115 /* Function: overlay_unmapped_address (PC, SECTION)
3116 Returns the address corresponding to PC in the unmapped (load) range.
3117 May be the same as PC. */
3120 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3122 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3124 bfd
*abfd
= section
->objfile
->obfd
;
3125 asection
*bfd_section
= section
->the_bfd_section
;
3127 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3128 - bfd_section_vma (abfd
, bfd_section
);
3134 /* Function: overlay_mapped_address (PC, SECTION)
3135 Returns the address corresponding to PC in the mapped (runtime) range.
3136 May be the same as PC. */
3139 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3141 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3143 bfd
*abfd
= section
->objfile
->obfd
;
3144 asection
*bfd_section
= section
->the_bfd_section
;
3146 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3147 - bfd_section_lma (abfd
, bfd_section
);
3153 /* Function: symbol_overlayed_address
3154 Return one of two addresses (relative to the VMA or to the LMA),
3155 depending on whether the section is mapped or not. */
3158 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3160 if (overlay_debugging
)
3162 /* If the symbol has no section, just return its regular address. */
3165 /* If the symbol's section is not an overlay, just return its
3167 if (!section_is_overlay (section
))
3169 /* If the symbol's section is mapped, just return its address. */
3170 if (section_is_mapped (section
))
3173 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3174 * then return its LOADED address rather than its vma address!!
3176 return overlay_unmapped_address (address
, section
);
3181 /* Function: find_pc_overlay (PC)
3182 Return the best-match overlay section for PC:
3183 If PC matches a mapped overlay section's VMA, return that section.
3184 Else if PC matches an unmapped section's VMA, return that section.
3185 Else if PC matches an unmapped section's LMA, return that section. */
3187 struct obj_section
*
3188 find_pc_overlay (CORE_ADDR pc
)
3190 struct objfile
*objfile
;
3191 struct obj_section
*osect
, *best_match
= NULL
;
3193 if (overlay_debugging
)
3195 ALL_OBJSECTIONS (objfile
, osect
)
3196 if (section_is_overlay (osect
))
3198 if (pc_in_mapped_range (pc
, osect
))
3200 if (section_is_mapped (osect
))
3205 else if (pc_in_unmapped_range (pc
, osect
))
3212 /* Function: find_pc_mapped_section (PC)
3213 If PC falls into the VMA address range of an overlay section that is
3214 currently marked as MAPPED, return that section. Else return NULL. */
3216 struct obj_section
*
3217 find_pc_mapped_section (CORE_ADDR pc
)
3219 struct objfile
*objfile
;
3220 struct obj_section
*osect
;
3222 if (overlay_debugging
)
3224 ALL_OBJSECTIONS (objfile
, osect
)
3225 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3232 /* Function: list_overlays_command
3233 Print a list of mapped sections and their PC ranges. */
3236 list_overlays_command (char *args
, int from_tty
)
3239 struct objfile
*objfile
;
3240 struct obj_section
*osect
;
3242 if (overlay_debugging
)
3244 ALL_OBJSECTIONS (objfile
, osect
)
3245 if (section_is_mapped (osect
))
3247 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3252 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3253 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3254 size
= bfd_get_section_size (osect
->the_bfd_section
);
3255 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3257 printf_filtered ("Section %s, loaded at ", name
);
3258 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3259 puts_filtered (" - ");
3260 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3261 printf_filtered (", mapped at ");
3262 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3263 puts_filtered (" - ");
3264 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3265 puts_filtered ("\n");
3271 printf_filtered (_("No sections are mapped.\n"));
3274 /* Function: map_overlay_command
3275 Mark the named section as mapped (ie. residing at its VMA address). */
3278 map_overlay_command (char *args
, int from_tty
)
3280 struct objfile
*objfile
, *objfile2
;
3281 struct obj_section
*sec
, *sec2
;
3283 if (!overlay_debugging
)
3284 error (_("Overlay debugging not enabled. Use "
3285 "either the 'overlay auto' or\n"
3286 "the 'overlay manual' command."));
3288 if (args
== 0 || *args
== 0)
3289 error (_("Argument required: name of an overlay section"));
3291 /* First, find a section matching the user supplied argument. */
3292 ALL_OBJSECTIONS (objfile
, sec
)
3293 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3295 /* Now, check to see if the section is an overlay. */
3296 if (!section_is_overlay (sec
))
3297 continue; /* not an overlay section */
3299 /* Mark the overlay as "mapped". */
3300 sec
->ovly_mapped
= 1;
3302 /* Next, make a pass and unmap any sections that are
3303 overlapped by this new section: */
3304 ALL_OBJSECTIONS (objfile2
, sec2
)
3305 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3308 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3309 bfd_section_name (objfile
->obfd
,
3310 sec2
->the_bfd_section
));
3311 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3315 error (_("No overlay section called %s"), args
);
3318 /* Function: unmap_overlay_command
3319 Mark the overlay section as unmapped
3320 (ie. resident in its LMA address range, rather than the VMA range). */
3323 unmap_overlay_command (char *args
, int from_tty
)
3325 struct objfile
*objfile
;
3326 struct obj_section
*sec
= NULL
;
3328 if (!overlay_debugging
)
3329 error (_("Overlay debugging not enabled. "
3330 "Use either the 'overlay auto' or\n"
3331 "the 'overlay manual' command."));
3333 if (args
== 0 || *args
== 0)
3334 error (_("Argument required: name of an overlay section"));
3336 /* First, find a section matching the user supplied argument. */
3337 ALL_OBJSECTIONS (objfile
, sec
)
3338 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3340 if (!sec
->ovly_mapped
)
3341 error (_("Section %s is not mapped"), args
);
3342 sec
->ovly_mapped
= 0;
3345 error (_("No overlay section called %s"), args
);
3348 /* Function: overlay_auto_command
3349 A utility command to turn on overlay debugging.
3350 Possibly this should be done via a set/show command. */
3353 overlay_auto_command (char *args
, int from_tty
)
3355 overlay_debugging
= ovly_auto
;
3356 enable_overlay_breakpoints ();
3358 printf_unfiltered (_("Automatic overlay debugging enabled."));
3361 /* Function: overlay_manual_command
3362 A utility command to turn on overlay debugging.
3363 Possibly this should be done via a set/show command. */
3366 overlay_manual_command (char *args
, int from_tty
)
3368 overlay_debugging
= ovly_on
;
3369 disable_overlay_breakpoints ();
3371 printf_unfiltered (_("Overlay debugging enabled."));
3374 /* Function: overlay_off_command
3375 A utility command to turn on overlay debugging.
3376 Possibly this should be done via a set/show command. */
3379 overlay_off_command (char *args
, int from_tty
)
3381 overlay_debugging
= ovly_off
;
3382 disable_overlay_breakpoints ();
3384 printf_unfiltered (_("Overlay debugging disabled."));
3388 overlay_load_command (char *args
, int from_tty
)
3390 struct gdbarch
*gdbarch
= get_current_arch ();
3392 if (gdbarch_overlay_update_p (gdbarch
))
3393 gdbarch_overlay_update (gdbarch
, NULL
);
3395 error (_("This target does not know how to read its overlay state."));
3398 /* Function: overlay_command
3399 A place-holder for a mis-typed command. */
3401 /* Command list chain containing all defined "overlay" subcommands. */
3402 static struct cmd_list_element
*overlaylist
;
3405 overlay_command (char *args
, int from_tty
)
3408 ("\"overlay\" must be followed by the name of an overlay command.\n");
3409 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3412 /* Target Overlays for the "Simplest" overlay manager:
3414 This is GDB's default target overlay layer. It works with the
3415 minimal overlay manager supplied as an example by Cygnus. The
3416 entry point is via a function pointer "gdbarch_overlay_update",
3417 so targets that use a different runtime overlay manager can
3418 substitute their own overlay_update function and take over the
3421 The overlay_update function pokes around in the target's data structures
3422 to see what overlays are mapped, and updates GDB's overlay mapping with
3425 In this simple implementation, the target data structures are as follows:
3426 unsigned _novlys; /# number of overlay sections #/
3427 unsigned _ovly_table[_novlys][4] = {
3428 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3429 {..., ..., ..., ...},
3431 unsigned _novly_regions; /# number of overlay regions #/
3432 unsigned _ovly_region_table[_novly_regions][3] = {
3433 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3436 These functions will attempt to update GDB's mappedness state in the
3437 symbol section table, based on the target's mappedness state.
3439 To do this, we keep a cached copy of the target's _ovly_table, and
3440 attempt to detect when the cached copy is invalidated. The main
3441 entry point is "simple_overlay_update(SECT), which looks up SECT in
3442 the cached table and re-reads only the entry for that section from
3443 the target (whenever possible). */
3445 /* Cached, dynamically allocated copies of the target data structures: */
3446 static unsigned (*cache_ovly_table
)[4] = 0;
3447 static unsigned cache_novlys
= 0;
3448 static CORE_ADDR cache_ovly_table_base
= 0;
3451 VMA
, OSIZE
, LMA
, MAPPED
3454 /* Throw away the cached copy of _ovly_table. */
3457 simple_free_overlay_table (void)
3459 if (cache_ovly_table
)
3460 xfree (cache_ovly_table
);
3462 cache_ovly_table
= NULL
;
3463 cache_ovly_table_base
= 0;
3466 /* Read an array of ints of size SIZE from the target into a local buffer.
3467 Convert to host order. int LEN is number of ints. */
3470 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3471 int len
, int size
, enum bfd_endian byte_order
)
3473 /* FIXME (alloca): Not safe if array is very large. */
3474 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3477 read_memory (memaddr
, buf
, len
* size
);
3478 for (i
= 0; i
< len
; i
++)
3479 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3482 /* Find and grab a copy of the target _ovly_table
3483 (and _novlys, which is needed for the table's size). */
3486 simple_read_overlay_table (void)
3488 struct bound_minimal_symbol novlys_msym
;
3489 struct bound_minimal_symbol ovly_table_msym
;
3490 struct gdbarch
*gdbarch
;
3492 enum bfd_endian byte_order
;
3494 simple_free_overlay_table ();
3495 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3496 if (! novlys_msym
.minsym
)
3498 error (_("Error reading inferior's overlay table: "
3499 "couldn't find `_novlys' variable\n"
3500 "in inferior. Use `overlay manual' mode."));
3504 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3505 if (! ovly_table_msym
.minsym
)
3507 error (_("Error reading inferior's overlay table: couldn't find "
3508 "`_ovly_table' array\n"
3509 "in inferior. Use `overlay manual' mode."));
3513 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3514 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3515 byte_order
= gdbarch_byte_order (gdbarch
);
3517 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3520 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3521 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3522 read_target_long_array (cache_ovly_table_base
,
3523 (unsigned int *) cache_ovly_table
,
3524 cache_novlys
* 4, word_size
, byte_order
);
3526 return 1; /* SUCCESS */
3529 /* Function: simple_overlay_update_1
3530 A helper function for simple_overlay_update. Assuming a cached copy
3531 of _ovly_table exists, look through it to find an entry whose vma,
3532 lma and size match those of OSECT. Re-read the entry and make sure
3533 it still matches OSECT (else the table may no longer be valid).
3534 Set OSECT's mapped state to match the entry. Return: 1 for
3535 success, 0 for failure. */
3538 simple_overlay_update_1 (struct obj_section
*osect
)
3541 bfd
*obfd
= osect
->objfile
->obfd
;
3542 asection
*bsect
= osect
->the_bfd_section
;
3543 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3544 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3545 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3547 for (i
= 0; i
< cache_novlys
; i
++)
3548 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3549 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3551 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3552 (unsigned int *) cache_ovly_table
[i
],
3553 4, word_size
, byte_order
);
3554 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3555 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3557 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3560 else /* Warning! Warning! Target's ovly table has changed! */
3566 /* Function: simple_overlay_update
3567 If OSECT is NULL, then update all sections' mapped state
3568 (after re-reading the entire target _ovly_table).
3569 If OSECT is non-NULL, then try to find a matching entry in the
3570 cached ovly_table and update only OSECT's mapped state.
3571 If a cached entry can't be found or the cache isn't valid, then
3572 re-read the entire cache, and go ahead and update all sections. */
3575 simple_overlay_update (struct obj_section
*osect
)
3577 struct objfile
*objfile
;
3579 /* Were we given an osect to look up? NULL means do all of them. */
3581 /* Have we got a cached copy of the target's overlay table? */
3582 if (cache_ovly_table
!= NULL
)
3584 /* Does its cached location match what's currently in the
3586 struct bound_minimal_symbol minsym
3587 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3589 if (minsym
.minsym
== NULL
)
3590 error (_("Error reading inferior's overlay table: couldn't "
3591 "find `_ovly_table' array\n"
3592 "in inferior. Use `overlay manual' mode."));
3594 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3595 /* Then go ahead and try to look up this single section in
3597 if (simple_overlay_update_1 (osect
))
3598 /* Found it! We're done. */
3602 /* Cached table no good: need to read the entire table anew.
3603 Or else we want all the sections, in which case it's actually
3604 more efficient to read the whole table in one block anyway. */
3606 if (! simple_read_overlay_table ())
3609 /* Now may as well update all sections, even if only one was requested. */
3610 ALL_OBJSECTIONS (objfile
, osect
)
3611 if (section_is_overlay (osect
))
3614 bfd
*obfd
= osect
->objfile
->obfd
;
3615 asection
*bsect
= osect
->the_bfd_section
;
3617 for (i
= 0; i
< cache_novlys
; i
++)
3618 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3619 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3620 { /* obj_section matches i'th entry in ovly_table. */
3621 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3622 break; /* finished with inner for loop: break out. */
3627 /* Set the output sections and output offsets for section SECTP in
3628 ABFD. The relocation code in BFD will read these offsets, so we
3629 need to be sure they're initialized. We map each section to itself,
3630 with no offset; this means that SECTP->vma will be honored. */
3633 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3635 sectp
->output_section
= sectp
;
3636 sectp
->output_offset
= 0;
3639 /* Default implementation for sym_relocate. */
3642 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3645 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3647 bfd
*abfd
= sectp
->owner
;
3649 /* We're only interested in sections with relocation
3651 if ((sectp
->flags
& SEC_RELOC
) == 0)
3654 /* We will handle section offsets properly elsewhere, so relocate as if
3655 all sections begin at 0. */
3656 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3658 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3661 /* Relocate the contents of a debug section SECTP in ABFD. The
3662 contents are stored in BUF if it is non-NULL, or returned in a
3663 malloc'd buffer otherwise.
3665 For some platforms and debug info formats, shared libraries contain
3666 relocations against the debug sections (particularly for DWARF-2;
3667 one affected platform is PowerPC GNU/Linux, although it depends on
3668 the version of the linker in use). Also, ELF object files naturally
3669 have unresolved relocations for their debug sections. We need to apply
3670 the relocations in order to get the locations of symbols correct.
3671 Another example that may require relocation processing, is the
3672 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3676 symfile_relocate_debug_section (struct objfile
*objfile
,
3677 asection
*sectp
, bfd_byte
*buf
)
3679 gdb_assert (objfile
->sf
->sym_relocate
);
3681 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3684 struct symfile_segment_data
*
3685 get_symfile_segment_data (bfd
*abfd
)
3687 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3692 return sf
->sym_segments (abfd
);
3696 free_symfile_segment_data (struct symfile_segment_data
*data
)
3698 xfree (data
->segment_bases
);
3699 xfree (data
->segment_sizes
);
3700 xfree (data
->segment_info
);
3705 - DATA, containing segment addresses from the object file ABFD, and
3706 the mapping from ABFD's sections onto the segments that own them,
3708 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3709 segment addresses reported by the target,
3710 store the appropriate offsets for each section in OFFSETS.
3712 If there are fewer entries in SEGMENT_BASES than there are segments
3713 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3715 If there are more entries, then ignore the extra. The target may
3716 not be able to distinguish between an empty data segment and a
3717 missing data segment; a missing text segment is less plausible. */
3720 symfile_map_offsets_to_segments (bfd
*abfd
,
3721 const struct symfile_segment_data
*data
,
3722 struct section_offsets
*offsets
,
3723 int num_segment_bases
,
3724 const CORE_ADDR
*segment_bases
)
3729 /* It doesn't make sense to call this function unless you have some
3730 segment base addresses. */
3731 gdb_assert (num_segment_bases
> 0);
3733 /* If we do not have segment mappings for the object file, we
3734 can not relocate it by segments. */
3735 gdb_assert (data
!= NULL
);
3736 gdb_assert (data
->num_segments
> 0);
3738 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3740 int which
= data
->segment_info
[i
];
3742 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3744 /* Don't bother computing offsets for sections that aren't
3745 loaded as part of any segment. */
3749 /* Use the last SEGMENT_BASES entry as the address of any extra
3750 segments mentioned in DATA->segment_info. */
3751 if (which
> num_segment_bases
)
3752 which
= num_segment_bases
;
3754 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3755 - data
->segment_bases
[which
- 1]);
3762 symfile_find_segment_sections (struct objfile
*objfile
)
3764 bfd
*abfd
= objfile
->obfd
;
3767 struct symfile_segment_data
*data
;
3769 data
= get_symfile_segment_data (objfile
->obfd
);
3773 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3775 free_symfile_segment_data (data
);
3779 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3781 int which
= data
->segment_info
[i
];
3785 if (objfile
->sect_index_text
== -1)
3786 objfile
->sect_index_text
= sect
->index
;
3788 if (objfile
->sect_index_rodata
== -1)
3789 objfile
->sect_index_rodata
= sect
->index
;
3791 else if (which
== 2)
3793 if (objfile
->sect_index_data
== -1)
3794 objfile
->sect_index_data
= sect
->index
;
3796 if (objfile
->sect_index_bss
== -1)
3797 objfile
->sect_index_bss
= sect
->index
;
3801 free_symfile_segment_data (data
);
3804 /* Listen for free_objfile events. */
3807 symfile_free_objfile (struct objfile
*objfile
)
3809 /* Remove the target sections owned by this objfile. */
3810 if (objfile
!= NULL
)
3811 remove_target_sections ((void *) objfile
);
3814 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3815 Expand all symtabs that match the specified criteria.
3816 See quick_symbol_functions.expand_symtabs_matching for details. */
3819 expand_symtabs_matching
3820 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3821 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3822 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3823 enum search_domain kind
)
3825 struct objfile
*objfile
;
3827 ALL_OBJFILES (objfile
)
3830 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3832 expansion_notify
, kind
);
3836 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3837 Map function FUN over every file.
3838 See quick_symbol_functions.map_symbol_filenames for details. */
3841 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3844 struct objfile
*objfile
;
3846 ALL_OBJFILES (objfile
)
3849 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3855 _initialize_symfile (void)
3857 struct cmd_list_element
*c
;
3859 observer_attach_free_objfile (symfile_free_objfile
);
3861 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3862 Load symbol table from executable file FILE.\n\
3863 The `file' command can also load symbol tables, as well as setting the file\n\
3864 to execute."), &cmdlist
);
3865 set_cmd_completer (c
, filename_completer
);
3867 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3868 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3869 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3870 ...]\nADDR is the starting address of the file's text.\n\
3871 The optional arguments are section-name section-address pairs and\n\
3872 should be specified if the data and bss segments are not contiguous\n\
3873 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3875 set_cmd_completer (c
, filename_completer
);
3877 c
= add_cmd ("remove-symbol-file", class_files
,
3878 remove_symbol_file_command
, _("\
3879 Remove a symbol file added via the add-symbol-file command.\n\
3880 Usage: remove-symbol-file FILENAME\n\
3881 remove-symbol-file -a ADDRESS\n\
3882 The file to remove can be identified by its filename or by an address\n\
3883 that lies within the boundaries of this symbol file in memory."),
3886 c
= add_cmd ("load", class_files
, load_command
, _("\
3887 Dynamically load FILE into the running program, and record its symbols\n\
3888 for access from GDB.\n\
3889 An optional load OFFSET may also be given as a literal address.\n\
3890 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3892 Usage: load [FILE] [OFFSET]"), &cmdlist
);
3893 set_cmd_completer (c
, filename_completer
);
3895 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3896 _("Commands for debugging overlays."), &overlaylist
,
3897 "overlay ", 0, &cmdlist
);
3899 add_com_alias ("ovly", "overlay", class_alias
, 1);
3900 add_com_alias ("ov", "overlay", class_alias
, 1);
3902 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3903 _("Assert that an overlay section is mapped."), &overlaylist
);
3905 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3906 _("Assert that an overlay section is unmapped."), &overlaylist
);
3908 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3909 _("List mappings of overlay sections."), &overlaylist
);
3911 add_cmd ("manual", class_support
, overlay_manual_command
,
3912 _("Enable overlay debugging."), &overlaylist
);
3913 add_cmd ("off", class_support
, overlay_off_command
,
3914 _("Disable overlay debugging."), &overlaylist
);
3915 add_cmd ("auto", class_support
, overlay_auto_command
,
3916 _("Enable automatic overlay debugging."), &overlaylist
);
3917 add_cmd ("load-target", class_support
, overlay_load_command
,
3918 _("Read the overlay mapping state from the target."), &overlaylist
);
3920 /* Filename extension to source language lookup table: */
3921 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3923 Set mapping between filename extension and source language."), _("\
3924 Show mapping between filename extension and source language."), _("\
3925 Usage: set extension-language .foo bar"),
3926 set_ext_lang_command
,
3928 &setlist
, &showlist
);
3930 add_info ("extensions", info_ext_lang_command
,
3931 _("All filename extensions associated with a source language."));
3933 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3934 &debug_file_directory
, _("\
3935 Set the directories where separate debug symbols are searched for."), _("\
3936 Show the directories where separate debug symbols are searched for."), _("\
3937 Separate debug symbols are first searched for in the same\n\
3938 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3939 and lastly at the path of the directory of the binary with\n\
3940 each global debug-file-directory component prepended."),
3942 show_debug_file_directory
,
3943 &setlist
, &showlist
);
3945 add_setshow_enum_cmd ("symbol-loading", no_class
,
3946 print_symbol_loading_enums
, &print_symbol_loading
,
3948 Set printing of symbol loading messages."), _("\
3949 Show printing of symbol loading messages."), _("\
3950 off == turn all messages off\n\
3951 brief == print messages for the executable,\n\
3952 and brief messages for shared libraries\n\
3953 full == print messages for the executable,\n\
3954 and messages for each shared library."),
3957 &setprintlist
, &showprintlist
);
3959 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3960 &separate_debug_file_debug
, _("\
3961 Set printing of separate debug info file search debug."), _("\
3962 Show printing of separate debug info file search debug."), _("\
3963 When on, GDB prints the searched locations while looking for separate debug \
3964 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);