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"
59 #include "common/byte-vector.h"
61 #include <sys/types.h>
69 int (*deprecated_ui_load_progress_hook
) (const char *section
,
71 void (*deprecated_show_load_progress
) (const char *section
,
72 unsigned long section_sent
,
73 unsigned long section_size
,
74 unsigned long total_sent
,
75 unsigned long total_size
);
76 void (*deprecated_pre_add_symbol_hook
) (const char *);
77 void (*deprecated_post_add_symbol_hook
) (void);
79 static void clear_symtab_users_cleanup (void *ignore
);
81 /* Global variables owned by this file. */
82 int readnow_symbol_files
; /* Read full symbols immediately. */
84 /* Functions this file defines. */
86 static void load_command (char *, int);
88 static void symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
91 static const struct sym_fns
*find_sym_fns (bfd
*);
93 static void overlay_invalidate_all (void);
95 static void simple_free_overlay_table (void);
97 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
100 static int simple_read_overlay_table (void);
102 static int simple_overlay_update_1 (struct obj_section
*);
104 static void info_ext_lang_command (char *args
, int from_tty
);
106 static void symfile_find_segment_sections (struct objfile
*objfile
);
108 /* List of all available sym_fns. On gdb startup, each object file reader
109 calls add_symtab_fns() to register information on each format it is
112 struct registered_sym_fns
114 registered_sym_fns (bfd_flavour sym_flavour_
, const struct sym_fns
*sym_fns_
)
115 : sym_flavour (sym_flavour_
), sym_fns (sym_fns_
)
118 /* BFD flavour that we handle. */
119 enum bfd_flavour sym_flavour
;
121 /* The "vtable" of symbol functions. */
122 const struct sym_fns
*sym_fns
;
125 static std::vector
<registered_sym_fns
> symtab_fns
;
127 /* Values for "set print symbol-loading". */
129 const char print_symbol_loading_off
[] = "off";
130 const char print_symbol_loading_brief
[] = "brief";
131 const char print_symbol_loading_full
[] = "full";
132 static const char *print_symbol_loading_enums
[] =
134 print_symbol_loading_off
,
135 print_symbol_loading_brief
,
136 print_symbol_loading_full
,
139 static const char *print_symbol_loading
= print_symbol_loading_full
;
141 /* If non-zero, shared library symbols will be added automatically
142 when the inferior is created, new libraries are loaded, or when
143 attaching to the inferior. This is almost always what users will
144 want to have happen; but for very large programs, the startup time
145 will be excessive, and so if this is a problem, the user can clear
146 this flag and then add the shared library symbols as needed. Note
147 that there is a potential for confusion, since if the shared
148 library symbols are not loaded, commands like "info fun" will *not*
149 report all the functions that are actually present. */
151 int auto_solib_add
= 1;
154 /* Return non-zero if symbol-loading messages should be printed.
155 FROM_TTY is the standard from_tty argument to gdb commands.
156 If EXEC is non-zero the messages are for the executable.
157 Otherwise, messages are for shared libraries.
158 If FULL is non-zero then the caller is printing a detailed message.
159 E.g., the message includes the shared library name.
160 Otherwise, the caller is printing a brief "summary" message. */
163 print_symbol_loading_p (int from_tty
, int exec
, int full
)
165 if (!from_tty
&& !info_verbose
)
170 /* We don't check FULL for executables, there are few such
171 messages, therefore brief == full. */
172 return print_symbol_loading
!= print_symbol_loading_off
;
175 return print_symbol_loading
== print_symbol_loading_full
;
176 return print_symbol_loading
== print_symbol_loading_brief
;
179 /* True if we are reading a symbol table. */
181 int currently_reading_symtab
= 0;
183 /* Increment currently_reading_symtab and return a cleanup that can be
184 used to decrement it. */
186 scoped_restore_tmpl
<int>
187 increment_reading_symtab (void)
189 gdb_assert (currently_reading_symtab
>= 0);
190 return make_scoped_restore (¤tly_reading_symtab
,
191 currently_reading_symtab
+ 1);
194 /* Remember the lowest-addressed loadable section we've seen.
195 This function is called via bfd_map_over_sections.
197 In case of equal vmas, the section with the largest size becomes the
198 lowest-addressed loadable section.
200 If the vmas and sizes are equal, the last section is considered the
201 lowest-addressed loadable section. */
204 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
206 asection
**lowest
= (asection
**) obj
;
208 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
211 *lowest
= sect
; /* First loadable section */
212 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
213 *lowest
= sect
; /* A lower loadable section */
214 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
215 && (bfd_section_size (abfd
, (*lowest
))
216 <= bfd_section_size (abfd
, sect
)))
220 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
221 new object's 'num_sections' field is set to 0; it must be updated
224 struct section_addr_info
*
225 alloc_section_addr_info (size_t num_sections
)
227 struct section_addr_info
*sap
;
230 size
= (sizeof (struct section_addr_info
)
231 + sizeof (struct other_sections
) * (num_sections
- 1));
232 sap
= (struct section_addr_info
*) xmalloc (size
);
233 memset (sap
, 0, size
);
238 /* Build (allocate and populate) a section_addr_info struct from
239 an existing section table. */
241 extern struct section_addr_info
*
242 build_section_addr_info_from_section_table (const struct target_section
*start
,
243 const struct target_section
*end
)
245 struct section_addr_info
*sap
;
246 const struct target_section
*stp
;
249 sap
= alloc_section_addr_info (end
- start
);
251 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
253 struct bfd_section
*asect
= stp
->the_bfd_section
;
254 bfd
*abfd
= asect
->owner
;
256 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
257 && oidx
< end
- start
)
259 sap
->other
[oidx
].addr
= stp
->addr
;
260 sap
->other
[oidx
].name
= xstrdup (bfd_section_name (abfd
, asect
));
261 sap
->other
[oidx
].sectindex
= gdb_bfd_section_index (abfd
, asect
);
266 sap
->num_sections
= oidx
;
271 /* Create a section_addr_info from section offsets in ABFD. */
273 static struct section_addr_info
*
274 build_section_addr_info_from_bfd (bfd
*abfd
)
276 struct section_addr_info
*sap
;
278 struct bfd_section
*sec
;
280 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
281 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
282 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
284 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
285 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
286 sap
->other
[i
].sectindex
= gdb_bfd_section_index (abfd
, sec
);
290 sap
->num_sections
= i
;
295 /* Create a section_addr_info from section offsets in OBJFILE. */
297 struct section_addr_info
*
298 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
300 struct section_addr_info
*sap
;
303 /* Before reread_symbols gets rewritten it is not safe to call:
304 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
306 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
307 for (i
= 0; i
< sap
->num_sections
; i
++)
309 int sectindex
= sap
->other
[i
].sectindex
;
311 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
316 /* Free all memory allocated by build_section_addr_info_from_section_table. */
319 free_section_addr_info (struct section_addr_info
*sap
)
323 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
324 xfree (sap
->other
[idx
].name
);
328 /* Initialize OBJFILE's sect_index_* members. */
331 init_objfile_sect_indices (struct objfile
*objfile
)
336 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
338 objfile
->sect_index_text
= sect
->index
;
340 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
342 objfile
->sect_index_data
= sect
->index
;
344 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
346 objfile
->sect_index_bss
= sect
->index
;
348 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
350 objfile
->sect_index_rodata
= sect
->index
;
352 /* This is where things get really weird... We MUST have valid
353 indices for the various sect_index_* members or gdb will abort.
354 So if for example, there is no ".text" section, we have to
355 accomodate that. First, check for a file with the standard
356 one or two segments. */
358 symfile_find_segment_sections (objfile
);
360 /* Except when explicitly adding symbol files at some address,
361 section_offsets contains nothing but zeros, so it doesn't matter
362 which slot in section_offsets the individual sect_index_* members
363 index into. So if they are all zero, it is safe to just point
364 all the currently uninitialized indices to the first slot. But
365 beware: if this is the main executable, it may be relocated
366 later, e.g. by the remote qOffsets packet, and then this will
367 be wrong! That's why we try segments first. */
369 for (i
= 0; i
< objfile
->num_sections
; i
++)
371 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
376 if (i
== objfile
->num_sections
)
378 if (objfile
->sect_index_text
== -1)
379 objfile
->sect_index_text
= 0;
380 if (objfile
->sect_index_data
== -1)
381 objfile
->sect_index_data
= 0;
382 if (objfile
->sect_index_bss
== -1)
383 objfile
->sect_index_bss
= 0;
384 if (objfile
->sect_index_rodata
== -1)
385 objfile
->sect_index_rodata
= 0;
389 /* The arguments to place_section. */
391 struct place_section_arg
393 struct section_offsets
*offsets
;
397 /* Find a unique offset to use for loadable section SECT if
398 the user did not provide an offset. */
401 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
403 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
404 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
406 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
408 /* We are only interested in allocated sections. */
409 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
412 /* If the user specified an offset, honor it. */
413 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
416 /* Otherwise, let's try to find a place for the section. */
417 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
424 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
426 int indx
= cur_sec
->index
;
428 /* We don't need to compare against ourself. */
432 /* We can only conflict with allocated sections. */
433 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
436 /* If the section offset is 0, either the section has not been placed
437 yet, or it was the lowest section placed (in which case LOWEST
438 will be past its end). */
439 if (offsets
[indx
] == 0)
442 /* If this section would overlap us, then we must move up. */
443 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
444 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
446 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
447 start_addr
= (start_addr
+ align
- 1) & -align
;
452 /* Otherwise, we appear to be OK. So far. */
457 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
458 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
461 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
462 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
466 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
468 const struct section_addr_info
*addrs
)
472 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
474 /* Now calculate offsets for section that were specified by the caller. */
475 for (i
= 0; i
< addrs
->num_sections
; i
++)
477 const struct other_sections
*osp
;
479 osp
= &addrs
->other
[i
];
480 if (osp
->sectindex
== -1)
483 /* Record all sections in offsets. */
484 /* The section_offsets in the objfile are here filled in using
486 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
490 /* Transform section name S for a name comparison. prelink can split section
491 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
492 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
493 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
494 (`.sbss') section has invalid (increased) virtual address. */
497 addr_section_name (const char *s
)
499 if (strcmp (s
, ".dynbss") == 0)
501 if (strcmp (s
, ".sdynbss") == 0)
507 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
508 their (name, sectindex) pair. sectindex makes the sort by name stable. */
511 addrs_section_compar (const void *ap
, const void *bp
)
513 const struct other_sections
*a
= *((struct other_sections
**) ap
);
514 const struct other_sections
*b
= *((struct other_sections
**) bp
);
517 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
521 return a
->sectindex
- b
->sectindex
;
524 /* Provide sorted array of pointers to sections of ADDRS. The array is
525 terminated by NULL. Caller is responsible to call xfree for it. */
527 static struct other_sections
**
528 addrs_section_sort (struct section_addr_info
*addrs
)
530 struct other_sections
**array
;
533 /* `+ 1' for the NULL terminator. */
534 array
= XNEWVEC (struct other_sections
*, addrs
->num_sections
+ 1);
535 for (i
= 0; i
< addrs
->num_sections
; i
++)
536 array
[i
] = &addrs
->other
[i
];
539 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
544 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
545 also SECTINDEXes specific to ABFD there. This function can be used to
546 rebase ADDRS to start referencing different BFD than before. */
549 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
551 asection
*lower_sect
;
552 CORE_ADDR lower_offset
;
554 struct cleanup
*my_cleanup
;
555 struct section_addr_info
*abfd_addrs
;
556 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
557 struct other_sections
**addrs_to_abfd_addrs
;
559 /* Find lowest loadable section to be used as starting point for
560 continguous sections. */
562 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
563 if (lower_sect
== NULL
)
565 warning (_("no loadable sections found in added symbol-file %s"),
566 bfd_get_filename (abfd
));
570 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
572 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
573 in ABFD. Section names are not unique - there can be multiple sections of
574 the same name. Also the sections of the same name do not have to be
575 adjacent to each other. Some sections may be present only in one of the
576 files. Even sections present in both files do not have to be in the same
579 Use stable sort by name for the sections in both files. Then linearly
580 scan both lists matching as most of the entries as possible. */
582 addrs_sorted
= addrs_section_sort (addrs
);
583 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
585 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
586 make_cleanup_free_section_addr_info (abfd_addrs
);
587 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
588 make_cleanup (xfree
, abfd_addrs_sorted
);
590 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
591 ABFD_ADDRS_SORTED. */
593 addrs_to_abfd_addrs
= XCNEWVEC (struct other_sections
*, addrs
->num_sections
);
594 make_cleanup (xfree
, addrs_to_abfd_addrs
);
596 while (*addrs_sorted
)
598 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
600 while (*abfd_addrs_sorted
601 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
605 if (*abfd_addrs_sorted
606 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
611 /* Make the found item directly addressable from ADDRS. */
612 index_in_addrs
= *addrs_sorted
- addrs
->other
;
613 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
614 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
616 /* Never use the same ABFD entry twice. */
623 /* Calculate offsets for the loadable sections.
624 FIXME! Sections must be in order of increasing loadable section
625 so that contiguous sections can use the lower-offset!!!
627 Adjust offsets if the segments are not contiguous.
628 If the section is contiguous, its offset should be set to
629 the offset of the highest loadable section lower than it
630 (the loadable section directly below it in memory).
631 this_offset = lower_offset = lower_addr - lower_orig_addr */
633 for (i
= 0; i
< addrs
->num_sections
; i
++)
635 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
639 /* This is the index used by BFD. */
640 addrs
->other
[i
].sectindex
= sect
->sectindex
;
642 if (addrs
->other
[i
].addr
!= 0)
644 addrs
->other
[i
].addr
-= sect
->addr
;
645 lower_offset
= addrs
->other
[i
].addr
;
648 addrs
->other
[i
].addr
= lower_offset
;
652 /* addr_section_name transformation is not used for SECT_NAME. */
653 const char *sect_name
= addrs
->other
[i
].name
;
655 /* This section does not exist in ABFD, which is normally
656 unexpected and we want to issue a warning.
658 However, the ELF prelinker does create a few sections which are
659 marked in the main executable as loadable (they are loaded in
660 memory from the DYNAMIC segment) and yet are not present in
661 separate debug info files. This is fine, and should not cause
662 a warning. Shared libraries contain just the section
663 ".gnu.liblist" but it is not marked as loadable there. There is
664 no other way to identify them than by their name as the sections
665 created by prelink have no special flags.
667 For the sections `.bss' and `.sbss' see addr_section_name. */
669 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
670 || strcmp (sect_name
, ".gnu.conflict") == 0
671 || (strcmp (sect_name
, ".bss") == 0
673 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
674 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
675 || (strcmp (sect_name
, ".sbss") == 0
677 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
678 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
679 warning (_("section %s not found in %s"), sect_name
,
680 bfd_get_filename (abfd
));
682 addrs
->other
[i
].addr
= 0;
683 addrs
->other
[i
].sectindex
= -1;
687 do_cleanups (my_cleanup
);
690 /* Parse the user's idea of an offset for dynamic linking, into our idea
691 of how to represent it for fast symbol reading. This is the default
692 version of the sym_fns.sym_offsets function for symbol readers that
693 don't need to do anything special. It allocates a section_offsets table
694 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
697 default_symfile_offsets (struct objfile
*objfile
,
698 const struct section_addr_info
*addrs
)
700 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
701 objfile
->section_offsets
= (struct section_offsets
*)
702 obstack_alloc (&objfile
->objfile_obstack
,
703 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
704 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
705 objfile
->num_sections
, addrs
);
707 /* For relocatable files, all loadable sections will start at zero.
708 The zero is meaningless, so try to pick arbitrary addresses such
709 that no loadable sections overlap. This algorithm is quadratic,
710 but the number of sections in a single object file is generally
712 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
714 struct place_section_arg arg
;
715 bfd
*abfd
= objfile
->obfd
;
718 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
719 /* We do not expect this to happen; just skip this step if the
720 relocatable file has a section with an assigned VMA. */
721 if (bfd_section_vma (abfd
, cur_sec
) != 0)
726 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
728 /* Pick non-overlapping offsets for sections the user did not
730 arg
.offsets
= objfile
->section_offsets
;
732 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
734 /* Correctly filling in the section offsets is not quite
735 enough. Relocatable files have two properties that
736 (most) shared objects do not:
738 - Their debug information will contain relocations. Some
739 shared libraries do also, but many do not, so this can not
742 - If there are multiple code sections they will be loaded
743 at different relative addresses in memory than they are
744 in the objfile, since all sections in the file will start
747 Because GDB has very limited ability to map from an
748 address in debug info to the correct code section,
749 it relies on adding SECT_OFF_TEXT to things which might be
750 code. If we clear all the section offsets, and set the
751 section VMAs instead, then symfile_relocate_debug_section
752 will return meaningful debug information pointing at the
755 GDB has too many different data structures for section
756 addresses - a bfd, objfile, and so_list all have section
757 tables, as does exec_ops. Some of these could probably
760 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
761 cur_sec
= cur_sec
->next
)
763 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
766 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
767 exec_set_section_address (bfd_get_filename (abfd
),
769 offsets
[cur_sec
->index
]);
770 offsets
[cur_sec
->index
] = 0;
775 /* Remember the bfd indexes for the .text, .data, .bss and
777 init_objfile_sect_indices (objfile
);
780 /* Divide the file into segments, which are individual relocatable units.
781 This is the default version of the sym_fns.sym_segments function for
782 symbol readers that do not have an explicit representation of segments.
783 It assumes that object files do not have segments, and fully linked
784 files have a single segment. */
786 struct symfile_segment_data
*
787 default_symfile_segments (bfd
*abfd
)
791 struct symfile_segment_data
*data
;
794 /* Relocatable files contain enough information to position each
795 loadable section independently; they should not be relocated
797 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
800 /* Make sure there is at least one loadable section in the file. */
801 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
803 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
811 low
= bfd_get_section_vma (abfd
, sect
);
812 high
= low
+ bfd_get_section_size (sect
);
814 data
= XCNEW (struct symfile_segment_data
);
815 data
->num_segments
= 1;
816 data
->segment_bases
= XCNEW (CORE_ADDR
);
817 data
->segment_sizes
= XCNEW (CORE_ADDR
);
819 num_sections
= bfd_count_sections (abfd
);
820 data
->segment_info
= XCNEWVEC (int, num_sections
);
822 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
826 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
829 vma
= bfd_get_section_vma (abfd
, sect
);
832 if (vma
+ bfd_get_section_size (sect
) > high
)
833 high
= vma
+ bfd_get_section_size (sect
);
835 data
->segment_info
[i
] = 1;
838 data
->segment_bases
[0] = low
;
839 data
->segment_sizes
[0] = high
- low
;
844 /* This is a convenience function to call sym_read for OBJFILE and
845 possibly force the partial symbols to be read. */
848 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
850 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
851 objfile
->per_bfd
->minsyms_read
= true;
853 /* find_separate_debug_file_in_section should be called only if there is
854 single binary with no existing separate debug info file. */
855 if (!objfile_has_partial_symbols (objfile
)
856 && objfile
->separate_debug_objfile
== NULL
857 && objfile
->separate_debug_objfile_backlink
== NULL
)
859 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
863 /* find_separate_debug_file_in_section uses the same filename for the
864 virtual section-as-bfd like the bfd filename containing the
865 section. Therefore use also non-canonical name form for the same
866 file containing the section. */
867 symbol_file_add_separate (abfd
.get (), objfile
->original_name
,
871 if ((add_flags
& SYMFILE_NO_READ
) == 0)
872 require_partial_symbols (objfile
, 0);
875 /* Initialize entry point information for this objfile. */
878 init_entry_point_info (struct objfile
*objfile
)
880 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
886 /* Save startup file's range of PC addresses to help blockframe.c
887 decide where the bottom of the stack is. */
889 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
891 /* Executable file -- record its entry point so we'll recognize
892 the startup file because it contains the entry point. */
893 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
894 ei
->entry_point_p
= 1;
896 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
897 && bfd_get_start_address (objfile
->obfd
) != 0)
899 /* Some shared libraries may have entry points set and be
900 runnable. There's no clear way to indicate this, so just check
901 for values other than zero. */
902 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
903 ei
->entry_point_p
= 1;
907 /* Examination of non-executable.o files. Short-circuit this stuff. */
908 ei
->entry_point_p
= 0;
911 if (ei
->entry_point_p
)
913 struct obj_section
*osect
;
914 CORE_ADDR entry_point
= ei
->entry_point
;
917 /* Make certain that the address points at real code, and not a
918 function descriptor. */
920 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
924 /* Remove any ISA markers, so that this matches entries in the
927 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
930 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
932 struct bfd_section
*sect
= osect
->the_bfd_section
;
934 if (entry_point
>= bfd_get_section_vma (objfile
->obfd
, sect
)
935 && entry_point
< (bfd_get_section_vma (objfile
->obfd
, sect
)
936 + bfd_get_section_size (sect
)))
938 ei
->the_bfd_section_index
939 = gdb_bfd_section_index (objfile
->obfd
, sect
);
946 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
950 /* Process a symbol file, as either the main file or as a dynamically
953 This function does not set the OBJFILE's entry-point info.
955 OBJFILE is where the symbols are to be read from.
957 ADDRS is the list of section load addresses. If the user has given
958 an 'add-symbol-file' command, then this is the list of offsets and
959 addresses he or she provided as arguments to the command; or, if
960 we're handling a shared library, these are the actual addresses the
961 sections are loaded at, according to the inferior's dynamic linker
962 (as gleaned by GDB's shared library code). We convert each address
963 into an offset from the section VMA's as it appears in the object
964 file, and then call the file's sym_offsets function to convert this
965 into a format-specific offset table --- a `struct section_offsets'.
967 ADD_FLAGS encodes verbosity level, whether this is main symbol or
968 an extra symbol file such as dynamically loaded code, and wether
969 breakpoint reset should be deferred. */
972 syms_from_objfile_1 (struct objfile
*objfile
,
973 struct section_addr_info
*addrs
,
974 symfile_add_flags add_flags
)
976 struct section_addr_info
*local_addr
= NULL
;
977 struct cleanup
*old_chain
;
978 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
980 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
982 if (objfile
->sf
== NULL
)
984 /* No symbols to load, but we still need to make sure
985 that the section_offsets table is allocated. */
986 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
987 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
989 objfile
->num_sections
= num_sections
;
990 objfile
->section_offsets
991 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
993 memset (objfile
->section_offsets
, 0, size
);
997 /* Make sure that partially constructed symbol tables will be cleaned up
998 if an error occurs during symbol reading. */
999 old_chain
= make_cleanup_free_objfile (objfile
);
1001 /* If ADDRS is NULL, put together a dummy address list.
1002 We now establish the convention that an addr of zero means
1003 no load address was specified. */
1006 local_addr
= alloc_section_addr_info (1);
1007 make_cleanup (xfree
, local_addr
);
1013 /* We will modify the main symbol table, make sure that all its users
1014 will be cleaned up if an error occurs during symbol reading. */
1015 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1017 /* Since no error yet, throw away the old symbol table. */
1019 if (symfile_objfile
!= NULL
)
1021 free_objfile (symfile_objfile
);
1022 gdb_assert (symfile_objfile
== NULL
);
1025 /* Currently we keep symbols from the add-symbol-file command.
1026 If the user wants to get rid of them, they should do "symbol-file"
1027 without arguments first. Not sure this is the best behavior
1030 (*objfile
->sf
->sym_new_init
) (objfile
);
1033 /* Convert addr into an offset rather than an absolute address.
1034 We find the lowest address of a loaded segment in the objfile,
1035 and assume that <addr> is where that got loaded.
1037 We no longer warn if the lowest section is not a text segment (as
1038 happens for the PA64 port. */
1039 if (addrs
->num_sections
> 0)
1040 addr_info_make_relative (addrs
, objfile
->obfd
);
1042 /* Initialize symbol reading routines for this objfile, allow complaints to
1043 appear for this new file, and record how verbose to be, then do the
1044 initial symbol reading for this file. */
1046 (*objfile
->sf
->sym_init
) (objfile
);
1047 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1049 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1051 read_symbols (objfile
, add_flags
);
1053 /* Discard cleanups as symbol reading was successful. */
1055 discard_cleanups (old_chain
);
1059 /* Same as syms_from_objfile_1, but also initializes the objfile
1060 entry-point info. */
1063 syms_from_objfile (struct objfile
*objfile
,
1064 struct section_addr_info
*addrs
,
1065 symfile_add_flags add_flags
)
1067 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1068 init_entry_point_info (objfile
);
1071 /* Perform required actions after either reading in the initial
1072 symbols for a new objfile, or mapping in the symbols from a reusable
1073 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1076 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1078 /* If this is the main symbol file we have to clean up all users of the
1079 old main symbol file. Otherwise it is sufficient to fixup all the
1080 breakpoints that may have been redefined by this symbol file. */
1081 if (add_flags
& SYMFILE_MAINLINE
)
1083 /* OK, make it the "real" symbol file. */
1084 symfile_objfile
= objfile
;
1086 clear_symtab_users (add_flags
);
1088 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1090 breakpoint_re_set ();
1093 /* We're done reading the symbol file; finish off complaints. */
1094 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1097 /* Process a symbol file, as either the main file or as a dynamically
1100 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1101 A new reference is acquired by this function.
1103 For NAME description see allocate_objfile's definition.
1105 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1106 extra, such as dynamically loaded code, and what to do with breakpoins.
1108 ADDRS is as described for syms_from_objfile_1, above.
1109 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1111 PARENT is the original objfile if ABFD is a separate debug info file.
1112 Otherwise PARENT is NULL.
1114 Upon success, returns a pointer to the objfile that was added.
1115 Upon failure, jumps back to command level (never returns). */
1117 static struct objfile
*
1118 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1119 symfile_add_flags add_flags
,
1120 struct section_addr_info
*addrs
,
1121 objfile_flags flags
, struct objfile
*parent
)
1123 struct objfile
*objfile
;
1124 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1125 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1126 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1127 && (readnow_symbol_files
1128 || (add_flags
& SYMFILE_NO_READ
) == 0));
1130 if (readnow_symbol_files
)
1132 flags
|= OBJF_READNOW
;
1133 add_flags
&= ~SYMFILE_NO_READ
;
1136 /* Give user a chance to burp if we'd be
1137 interactively wiping out any existing symbols. */
1139 if ((have_full_symbols () || have_partial_symbols ())
1142 && !query (_("Load new symbol table from \"%s\"? "), name
))
1143 error (_("Not confirmed."));
1146 flags
|= OBJF_MAINLINE
;
1147 objfile
= allocate_objfile (abfd
, name
, flags
);
1150 add_separate_debug_objfile (objfile
, parent
);
1152 /* We either created a new mapped symbol table, mapped an existing
1153 symbol table file which has not had initial symbol reading
1154 performed, or need to read an unmapped symbol table. */
1157 if (deprecated_pre_add_symbol_hook
)
1158 deprecated_pre_add_symbol_hook (name
);
1161 printf_unfiltered (_("Reading symbols from %s..."), name
);
1163 gdb_flush (gdb_stdout
);
1166 syms_from_objfile (objfile
, addrs
, add_flags
);
1168 /* We now have at least a partial symbol table. Check to see if the
1169 user requested that all symbols be read on initial access via either
1170 the gdb startup command line or on a per symbol file basis. Expand
1171 all partial symbol tables for this objfile if so. */
1173 if ((flags
& OBJF_READNOW
))
1177 printf_unfiltered (_("expanding to full symbols..."));
1179 gdb_flush (gdb_stdout
);
1183 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1186 if (should_print
&& !objfile_has_symbols (objfile
))
1189 printf_unfiltered (_("(no debugging symbols found)..."));
1195 if (deprecated_post_add_symbol_hook
)
1196 deprecated_post_add_symbol_hook ();
1198 printf_unfiltered (_("done.\n"));
1201 /* We print some messages regardless of whether 'from_tty ||
1202 info_verbose' is true, so make sure they go out at the right
1204 gdb_flush (gdb_stdout
);
1206 if (objfile
->sf
== NULL
)
1208 observer_notify_new_objfile (objfile
);
1209 return objfile
; /* No symbols. */
1212 finish_new_objfile (objfile
, add_flags
);
1214 observer_notify_new_objfile (objfile
);
1216 bfd_cache_close_all ();
1220 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1221 see allocate_objfile's definition. */
1224 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1225 symfile_add_flags symfile_flags
,
1226 struct objfile
*objfile
)
1228 struct section_addr_info
*sap
;
1229 struct cleanup
*my_cleanup
;
1231 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1232 because sections of BFD may not match sections of OBJFILE and because
1233 vma may have been modified by tools such as prelink. */
1234 sap
= build_section_addr_info_from_objfile (objfile
);
1235 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1237 symbol_file_add_with_addrs
1238 (bfd
, name
, symfile_flags
, sap
,
1239 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1243 do_cleanups (my_cleanup
);
1246 /* Process the symbol file ABFD, as either the main file or as a
1247 dynamically loaded file.
1248 See symbol_file_add_with_addrs's comments for details. */
1251 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1252 symfile_add_flags add_flags
,
1253 struct section_addr_info
*addrs
,
1254 objfile_flags flags
, struct objfile
*parent
)
1256 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1260 /* Process a symbol file, as either the main file or as a dynamically
1261 loaded file. See symbol_file_add_with_addrs's comments for details. */
1264 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1265 struct section_addr_info
*addrs
, objfile_flags flags
)
1267 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1269 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1273 /* Call symbol_file_add() with default values and update whatever is
1274 affected by the loading of a new main().
1275 Used when the file is supplied in the gdb command line
1276 and by some targets with special loading requirements.
1277 The auxiliary function, symbol_file_add_main_1(), has the flags
1278 argument for the switches that can only be specified in the symbol_file
1282 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1284 symbol_file_add_main_1 (args
, add_flags
, 0);
1288 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1289 objfile_flags flags
)
1291 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1293 symbol_file_add (args
, add_flags
, NULL
, flags
);
1295 /* Getting new symbols may change our opinion about
1296 what is frameless. */
1297 reinit_frame_cache ();
1299 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1300 set_initial_language ();
1304 symbol_file_clear (int from_tty
)
1306 if ((have_full_symbols () || have_partial_symbols ())
1309 ? !query (_("Discard symbol table from `%s'? "),
1310 objfile_name (symfile_objfile
))
1311 : !query (_("Discard symbol table? "))))
1312 error (_("Not confirmed."));
1314 /* solib descriptors may have handles to objfiles. Wipe them before their
1315 objfiles get stale by free_all_objfiles. */
1316 no_shared_libraries (NULL
, from_tty
);
1318 free_all_objfiles ();
1320 gdb_assert (symfile_objfile
== NULL
);
1322 printf_unfiltered (_("No symbol file now.\n"));
1325 /* See symfile.h. */
1327 int separate_debug_file_debug
= 0;
1330 separate_debug_file_exists (const char *name
, unsigned long crc
,
1331 struct objfile
*parent_objfile
)
1333 unsigned long file_crc
;
1335 struct stat parent_stat
, abfd_stat
;
1336 int verified_as_different
;
1338 /* Find a separate debug info file as if symbols would be present in
1339 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1340 section can contain just the basename of PARENT_OBJFILE without any
1341 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1342 the separate debug infos with the same basename can exist. */
1344 if (filename_cmp (name
, objfile_name (parent_objfile
)) == 0)
1347 if (separate_debug_file_debug
)
1348 printf_unfiltered (_(" Trying %s\n"), name
);
1350 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
, gnutarget
, -1));
1355 /* Verify symlinks were not the cause of filename_cmp name difference above.
1357 Some operating systems, e.g. Windows, do not provide a meaningful
1358 st_ino; they always set it to zero. (Windows does provide a
1359 meaningful st_dev.) Files accessed from gdbservers that do not
1360 support the vFile:fstat packet will also have st_ino set to zero.
1361 Do not indicate a duplicate library in either case. While there
1362 is no guarantee that a system that provides meaningful inode
1363 numbers will never set st_ino to zero, this is merely an
1364 optimization, so we do not need to worry about false negatives. */
1366 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1367 && abfd_stat
.st_ino
!= 0
1368 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1370 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1371 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1373 verified_as_different
= 1;
1376 verified_as_different
= 0;
1378 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1383 if (crc
!= file_crc
)
1385 unsigned long parent_crc
;
1387 /* If the files could not be verified as different with
1388 bfd_stat then we need to calculate the parent's CRC
1389 to verify whether the files are different or not. */
1391 if (!verified_as_different
)
1393 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1397 if (verified_as_different
|| parent_crc
!= file_crc
)
1398 warning (_("the debug information found in \"%s\""
1399 " does not match \"%s\" (CRC mismatch).\n"),
1400 name
, objfile_name (parent_objfile
));
1408 char *debug_file_directory
= NULL
;
1410 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1411 struct cmd_list_element
*c
, const char *value
)
1413 fprintf_filtered (file
,
1414 _("The directory where separate debug "
1415 "symbols are searched for is \"%s\".\n"),
1419 #if ! defined (DEBUG_SUBDIRECTORY)
1420 #define DEBUG_SUBDIRECTORY ".debug"
1423 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1424 where the original file resides (may not be the same as
1425 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1426 looking for. CANON_DIR is the "realpath" form of DIR.
1427 DIR must contain a trailing '/'.
1428 Returns the path of the file with separate debug info, of NULL. */
1431 find_separate_debug_file (const char *dir
,
1432 const char *canon_dir
,
1433 const char *debuglink
,
1434 unsigned long crc32
, struct objfile
*objfile
)
1439 VEC (char_ptr
) *debugdir_vec
;
1440 struct cleanup
*back_to
;
1443 if (separate_debug_file_debug
)
1444 printf_unfiltered (_("\nLooking for separate debug info (debug link) for "
1445 "%s\n"), objfile_name (objfile
));
1447 /* Set I to std::max (strlen (canon_dir), strlen (dir)). */
1449 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1450 i
= strlen (canon_dir
);
1453 = (char *) xmalloc (strlen (debug_file_directory
) + 1
1455 + strlen (DEBUG_SUBDIRECTORY
)
1457 + strlen (debuglink
)
1460 /* First try in the same directory as the original file. */
1461 strcpy (debugfile
, dir
);
1462 strcat (debugfile
, debuglink
);
1464 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1467 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1468 strcpy (debugfile
, dir
);
1469 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1470 strcat (debugfile
, "/");
1471 strcat (debugfile
, debuglink
);
1473 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1476 /* Then try in the global debugfile directories.
1478 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1479 cause "/..." lookups. */
1481 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1482 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1484 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1486 strcpy (debugfile
, debugdir
);
1487 strcat (debugfile
, "/");
1488 strcat (debugfile
, dir
);
1489 strcat (debugfile
, debuglink
);
1491 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1493 do_cleanups (back_to
);
1497 /* If the file is in the sysroot, try using its base path in the
1498 global debugfile directory. */
1499 if (canon_dir
!= NULL
1500 && filename_ncmp (canon_dir
, gdb_sysroot
,
1501 strlen (gdb_sysroot
)) == 0
1502 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1504 strcpy (debugfile
, debugdir
);
1505 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1506 strcat (debugfile
, "/");
1507 strcat (debugfile
, debuglink
);
1509 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1511 do_cleanups (back_to
);
1517 do_cleanups (back_to
);
1522 /* Modify PATH to contain only "[/]directory/" part of PATH.
1523 If there were no directory separators in PATH, PATH will be empty
1524 string on return. */
1527 terminate_after_last_dir_separator (char *path
)
1531 /* Strip off the final filename part, leaving the directory name,
1532 followed by a slash. The directory can be relative or absolute. */
1533 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1534 if (IS_DIR_SEPARATOR (path
[i
]))
1537 /* If I is -1 then no directory is present there and DIR will be "". */
1541 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1542 Returns pathname, or NULL. */
1545 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1548 char *dir
, *canon_dir
;
1550 unsigned long crc32
;
1551 struct cleanup
*cleanups
;
1553 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1555 if (debuglink
== NULL
)
1557 /* There's no separate debug info, hence there's no way we could
1558 load it => no warning. */
1562 cleanups
= make_cleanup (xfree
, debuglink
);
1563 dir
= xstrdup (objfile_name (objfile
));
1564 make_cleanup (xfree
, dir
);
1565 terminate_after_last_dir_separator (dir
);
1566 canon_dir
= lrealpath (dir
);
1568 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1572 if (debugfile
== NULL
)
1574 /* For PR gdb/9538, try again with realpath (if different from the
1579 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1580 && S_ISLNK (st_buf
.st_mode
))
1584 symlink_dir
= lrealpath (objfile_name (objfile
));
1585 if (symlink_dir
!= NULL
)
1587 make_cleanup (xfree
, symlink_dir
);
1588 terminate_after_last_dir_separator (symlink_dir
);
1589 if (strcmp (dir
, symlink_dir
) != 0)
1591 /* Different directory, so try using it. */
1592 debugfile
= find_separate_debug_file (symlink_dir
,
1602 do_cleanups (cleanups
);
1606 /* This is the symbol-file command. Read the file, analyze its
1607 symbols, and add a struct symtab to a symtab list. The syntax of
1608 the command is rather bizarre:
1610 1. The function buildargv implements various quoting conventions
1611 which are undocumented and have little or nothing in common with
1612 the way things are quoted (or not quoted) elsewhere in GDB.
1614 2. Options are used, which are not generally used in GDB (perhaps
1615 "set mapped on", "set readnow on" would be better)
1617 3. The order of options matters, which is contrary to GNU
1618 conventions (because it is confusing and inconvenient). */
1621 symbol_file_command (const char *args
, int from_tty
)
1627 symbol_file_clear (from_tty
);
1631 objfile_flags flags
= OBJF_USERLOADED
;
1632 symfile_add_flags add_flags
= 0;
1636 add_flags
|= SYMFILE_VERBOSE
;
1638 gdb_argv
built_argv (args
);
1639 for (char *arg
: built_argv
)
1641 if (strcmp (arg
, "-readnow") == 0)
1642 flags
|= OBJF_READNOW
;
1643 else if (*arg
== '-')
1644 error (_("unknown option `%s'"), arg
);
1647 symbol_file_add_main_1 (arg
, add_flags
, flags
);
1653 error (_("no symbol file name was specified"));
1657 /* Set the initial language.
1659 FIXME: A better solution would be to record the language in the
1660 psymtab when reading partial symbols, and then use it (if known) to
1661 set the language. This would be a win for formats that encode the
1662 language in an easily discoverable place, such as DWARF. For
1663 stabs, we can jump through hoops looking for specially named
1664 symbols or try to intuit the language from the specific type of
1665 stabs we find, but we can't do that until later when we read in
1669 set_initial_language (void)
1671 enum language lang
= main_language ();
1673 if (lang
== language_unknown
)
1675 char *name
= main_name ();
1676 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1679 lang
= SYMBOL_LANGUAGE (sym
);
1682 if (lang
== language_unknown
)
1684 /* Make C the default language */
1688 set_language (lang
);
1689 expected_language
= current_language
; /* Don't warn the user. */
1692 /* Open the file specified by NAME and hand it off to BFD for
1693 preliminary analysis. Return a newly initialized bfd *, which
1694 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1695 absolute). In case of trouble, error() is called. */
1698 symfile_bfd_open (const char *name
)
1701 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
1703 if (!is_target_filename (name
))
1705 char *absolute_name
;
1707 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1709 /* Look down path for it, allocate 2nd new malloc'd copy. */
1710 desc
= openp (getenv ("PATH"),
1711 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1712 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1713 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1716 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1718 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1719 desc
= openp (getenv ("PATH"),
1720 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1721 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1725 perror_with_name (expanded_name
.get ());
1727 make_cleanup (xfree
, absolute_name
);
1728 name
= absolute_name
;
1731 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1732 if (sym_bfd
== NULL
)
1733 error (_("`%s': can't open to read symbols: %s."), name
,
1734 bfd_errmsg (bfd_get_error ()));
1736 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1737 bfd_set_cacheable (sym_bfd
.get (), 1);
1739 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1740 error (_("`%s': can't read symbols: %s."), name
,
1741 bfd_errmsg (bfd_get_error ()));
1743 do_cleanups (back_to
);
1748 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1749 the section was not found. */
1752 get_section_index (struct objfile
*objfile
, const char *section_name
)
1754 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1762 /* Link SF into the global symtab_fns list.
1763 FLAVOUR is the file format that SF handles.
1764 Called on startup by the _initialize routine in each object file format
1765 reader, to register information about each format the reader is prepared
1769 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1771 symtab_fns
.emplace_back (flavour
, sf
);
1774 /* Initialize OBJFILE to read symbols from its associated BFD. It
1775 either returns or calls error(). The result is an initialized
1776 struct sym_fns in the objfile structure, that contains cached
1777 information about the symbol file. */
1779 static const struct sym_fns
*
1780 find_sym_fns (bfd
*abfd
)
1782 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1784 if (our_flavour
== bfd_target_srec_flavour
1785 || our_flavour
== bfd_target_ihex_flavour
1786 || our_flavour
== bfd_target_tekhex_flavour
)
1787 return NULL
; /* No symbols. */
1789 for (const registered_sym_fns
&rsf
: symtab_fns
)
1790 if (our_flavour
== rsf
.sym_flavour
)
1793 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1794 bfd_get_target (abfd
));
1798 /* This function runs the load command of our current target. */
1801 load_command (char *arg
, int from_tty
)
1803 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1807 /* The user might be reloading because the binary has changed. Take
1808 this opportunity to check. */
1809 reopen_exec_file ();
1817 parg
= arg
= get_exec_file (1);
1819 /* Count how many \ " ' tab space there are in the name. */
1820 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1828 /* We need to quote this string so buildargv can pull it apart. */
1829 char *temp
= (char *) xmalloc (strlen (arg
) + count
+ 1 );
1833 make_cleanup (xfree
, temp
);
1836 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1838 strncpy (ptemp
, prev
, parg
- prev
);
1839 ptemp
+= parg
- prev
;
1843 strcpy (ptemp
, prev
);
1849 target_load (arg
, from_tty
);
1851 /* After re-loading the executable, we don't really know which
1852 overlays are mapped any more. */
1853 overlay_cache_invalid
= 1;
1855 do_cleanups (cleanup
);
1858 /* This version of "load" should be usable for any target. Currently
1859 it is just used for remote targets, not inftarg.c or core files,
1860 on the theory that only in that case is it useful.
1862 Avoiding xmodem and the like seems like a win (a) because we don't have
1863 to worry about finding it, and (b) On VMS, fork() is very slow and so
1864 we don't want to run a subprocess. On the other hand, I'm not sure how
1865 performance compares. */
1867 static int validate_download
= 0;
1869 /* Callback service function for generic_load (bfd_map_over_sections). */
1872 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1874 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1876 *sum
+= bfd_get_section_size (asec
);
1879 /* Opaque data for load_section_callback. */
1880 struct load_section_data
{
1881 CORE_ADDR load_offset
;
1882 struct load_progress_data
*progress_data
;
1883 VEC(memory_write_request_s
) *requests
;
1886 /* Opaque data for load_progress. */
1887 struct load_progress_data
{
1888 /* Cumulative data. */
1889 unsigned long write_count
;
1890 unsigned long data_count
;
1891 bfd_size_type total_size
;
1894 /* Opaque data for load_progress for a single section. */
1895 struct load_progress_section_data
{
1896 struct load_progress_data
*cumulative
;
1898 /* Per-section data. */
1899 const char *section_name
;
1900 ULONGEST section_sent
;
1901 ULONGEST section_size
;
1906 /* Target write callback routine for progress reporting. */
1909 load_progress (ULONGEST bytes
, void *untyped_arg
)
1911 struct load_progress_section_data
*args
1912 = (struct load_progress_section_data
*) untyped_arg
;
1913 struct load_progress_data
*totals
;
1916 /* Writing padding data. No easy way to get at the cumulative
1917 stats, so just ignore this. */
1920 totals
= args
->cumulative
;
1922 if (bytes
== 0 && args
->section_sent
== 0)
1924 /* The write is just starting. Let the user know we've started
1926 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1928 hex_string (args
->section_size
),
1929 paddress (target_gdbarch (), args
->lma
));
1933 if (validate_download
)
1935 /* Broken memories and broken monitors manifest themselves here
1936 when bring new computers to life. This doubles already slow
1938 /* NOTE: cagney/1999-10-18: A more efficient implementation
1939 might add a verify_memory() method to the target vector and
1940 then use that. remote.c could implement that method using
1941 the ``qCRC'' packet. */
1942 gdb::byte_vector
check (bytes
);
1944 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1945 error (_("Download verify read failed at %s"),
1946 paddress (target_gdbarch (), args
->lma
));
1947 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1948 error (_("Download verify compare failed at %s"),
1949 paddress (target_gdbarch (), args
->lma
));
1951 totals
->data_count
+= bytes
;
1953 args
->buffer
+= bytes
;
1954 totals
->write_count
+= 1;
1955 args
->section_sent
+= bytes
;
1956 if (check_quit_flag ()
1957 || (deprecated_ui_load_progress_hook
!= NULL
1958 && deprecated_ui_load_progress_hook (args
->section_name
,
1959 args
->section_sent
)))
1960 error (_("Canceled the download"));
1962 if (deprecated_show_load_progress
!= NULL
)
1963 deprecated_show_load_progress (args
->section_name
,
1967 totals
->total_size
);
1970 /* Callback service function for generic_load (bfd_map_over_sections). */
1973 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1975 struct memory_write_request
*new_request
;
1976 struct load_section_data
*args
= (struct load_section_data
*) data
;
1977 struct load_progress_section_data
*section_data
;
1978 bfd_size_type size
= bfd_get_section_size (asec
);
1980 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1982 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1988 new_request
= VEC_safe_push (memory_write_request_s
,
1989 args
->requests
, NULL
);
1990 memset (new_request
, 0, sizeof (struct memory_write_request
));
1991 section_data
= XCNEW (struct load_progress_section_data
);
1992 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1993 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
1995 new_request
->data
= (gdb_byte
*) xmalloc (size
);
1996 new_request
->baton
= section_data
;
1998 buffer
= new_request
->data
;
2000 section_data
->cumulative
= args
->progress_data
;
2001 section_data
->section_name
= sect_name
;
2002 section_data
->section_size
= size
;
2003 section_data
->lma
= new_request
->begin
;
2004 section_data
->buffer
= buffer
;
2006 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2009 /* Clean up an entire memory request vector, including load
2010 data and progress records. */
2013 clear_memory_write_data (void *arg
)
2015 VEC(memory_write_request_s
) **vec_p
= (VEC(memory_write_request_s
) **) arg
;
2016 VEC(memory_write_request_s
) *vec
= *vec_p
;
2018 struct memory_write_request
*mr
;
2020 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2025 VEC_free (memory_write_request_s
, vec
);
2028 static void print_transfer_performance (struct ui_file
*stream
,
2029 unsigned long data_count
,
2030 unsigned long write_count
,
2031 std::chrono::steady_clock::duration d
);
2034 generic_load (const char *args
, int from_tty
)
2036 struct cleanup
*old_cleanups
;
2037 struct load_section_data cbdata
;
2038 struct load_progress_data total_progress
;
2039 struct ui_out
*uiout
= current_uiout
;
2043 memset (&cbdata
, 0, sizeof (cbdata
));
2044 memset (&total_progress
, 0, sizeof (total_progress
));
2045 cbdata
.progress_data
= &total_progress
;
2047 old_cleanups
= make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2050 error_no_arg (_("file to load"));
2052 gdb_argv
argv (args
);
2054 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2056 if (argv
[1] != NULL
)
2060 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2062 /* If the last word was not a valid number then
2063 treat it as a file name with spaces in. */
2064 if (argv
[1] == endptr
)
2065 error (_("Invalid download offset:%s."), argv
[1]);
2067 if (argv
[2] != NULL
)
2068 error (_("Too many parameters."));
2071 /* Open the file for loading. */
2072 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
2073 if (loadfile_bfd
== NULL
)
2074 perror_with_name (filename
.get ());
2076 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2078 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2079 bfd_errmsg (bfd_get_error ()));
2082 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
2083 (void *) &total_progress
.total_size
);
2085 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
2087 using namespace std::chrono
;
2089 steady_clock::time_point start_time
= steady_clock::now ();
2091 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2092 load_progress
) != 0)
2093 error (_("Load failed"));
2095 steady_clock::time_point end_time
= steady_clock::now ();
2097 entry
= bfd_get_start_address (loadfile_bfd
.get ());
2098 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2099 uiout
->text ("Start address ");
2100 uiout
->field_fmt ("address", "%s", paddress (target_gdbarch (), entry
));
2101 uiout
->text (", load size ");
2102 uiout
->field_fmt ("load-size", "%lu", total_progress
.data_count
);
2104 regcache_write_pc (get_current_regcache (), entry
);
2106 /* Reset breakpoints, now that we have changed the load image. For
2107 instance, breakpoints may have been set (or reset, by
2108 post_create_inferior) while connected to the target but before we
2109 loaded the program. In that case, the prologue analyzer could
2110 have read instructions from the target to find the right
2111 breakpoint locations. Loading has changed the contents of that
2114 breakpoint_re_set ();
2116 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2117 total_progress
.write_count
,
2118 end_time
- start_time
);
2120 do_cleanups (old_cleanups
);
2123 /* Report on STREAM the performance of a memory transfer operation,
2124 such as 'load'. DATA_COUNT is the number of bytes transferred.
2125 WRITE_COUNT is the number of separate write operations, or 0, if
2126 that information is not available. TIME is how long the operation
2130 print_transfer_performance (struct ui_file
*stream
,
2131 unsigned long data_count
,
2132 unsigned long write_count
,
2133 std::chrono::steady_clock::duration time
)
2135 using namespace std::chrono
;
2136 struct ui_out
*uiout
= current_uiout
;
2138 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2140 uiout
->text ("Transfer rate: ");
2141 if (ms
.count () > 0)
2143 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2145 if (uiout
->is_mi_like_p ())
2147 uiout
->field_fmt ("transfer-rate", "%lu", rate
* 8);
2148 uiout
->text (" bits/sec");
2150 else if (rate
< 1024)
2152 uiout
->field_fmt ("transfer-rate", "%lu", rate
);
2153 uiout
->text (" bytes/sec");
2157 uiout
->field_fmt ("transfer-rate", "%lu", rate
/ 1024);
2158 uiout
->text (" KB/sec");
2163 uiout
->field_fmt ("transferred-bits", "%lu", (data_count
* 8));
2164 uiout
->text (" bits in <1 sec");
2166 if (write_count
> 0)
2169 uiout
->field_fmt ("write-rate", "%lu", data_count
/ write_count
);
2170 uiout
->text (" bytes/write");
2172 uiout
->text (".\n");
2175 /* This function allows the addition of incrementally linked object files.
2176 It does not modify any state in the target, only in the debugger. */
2177 /* Note: ezannoni 2000-04-13 This function/command used to have a
2178 special case syntax for the rombug target (Rombug is the boot
2179 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2180 rombug case, the user doesn't need to supply a text address,
2181 instead a call to target_link() (in target.c) would supply the
2182 value to use. We are now discontinuing this type of ad hoc syntax. */
2185 add_symbol_file_command (const char *args
, int from_tty
)
2187 struct gdbarch
*gdbarch
= get_current_arch ();
2188 gdb::unique_xmalloc_ptr
<char> filename
;
2192 int expecting_sec_name
= 0;
2193 int expecting_sec_addr
= 0;
2194 struct objfile
*objf
;
2195 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2196 symfile_add_flags add_flags
= 0;
2199 add_flags
|= SYMFILE_VERBOSE
;
2207 struct section_addr_info
*section_addrs
;
2208 std::vector
<sect_opt
> sect_opts
;
2209 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2214 error (_("add-symbol-file takes a file name and an address"));
2216 gdb_argv
argv (args
);
2218 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2220 /* Process the argument. */
2223 /* The first argument is the file name. */
2224 filename
.reset (tilde_expand (arg
));
2226 else if (argcnt
== 1)
2228 /* The second argument is always the text address at which
2229 to load the program. */
2230 sect_opt sect
= { ".text", arg
};
2231 sect_opts
.push_back (sect
);
2235 /* It's an option (starting with '-') or it's an argument
2237 if (expecting_sec_name
)
2239 sect_opt sect
= { arg
, NULL
};
2240 sect_opts
.push_back (sect
);
2241 expecting_sec_name
= 0;
2243 else if (expecting_sec_addr
)
2245 sect_opts
.back ().value
= arg
;
2246 expecting_sec_addr
= 0;
2248 else if (strcmp (arg
, "-readnow") == 0)
2249 flags
|= OBJF_READNOW
;
2250 else if (strcmp (arg
, "-s") == 0)
2252 expecting_sec_name
= 1;
2253 expecting_sec_addr
= 1;
2256 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2257 " [-readnow] [-s <secname> <addr>]*"));
2261 /* This command takes at least two arguments. The first one is a
2262 filename, and the second is the address where this file has been
2263 loaded. Abort now if this address hasn't been provided by the
2265 if (sect_opts
.empty ())
2266 error (_("The address where %s has been loaded is missing"),
2269 /* Print the prompt for the query below. And save the arguments into
2270 a sect_addr_info structure to be passed around to other
2271 functions. We have to split this up into separate print
2272 statements because hex_string returns a local static
2275 printf_unfiltered (_("add symbol table from file \"%s\" at\n"),
2277 section_addrs
= alloc_section_addr_info (sect_opts
.size ());
2278 make_cleanup (xfree
, section_addrs
);
2279 for (sect_opt
§
: sect_opts
)
2282 const char *val
= sect
.value
;
2283 const char *sec
= sect
.name
;
2285 addr
= parse_and_eval_address (val
);
2287 /* Here we store the section offsets in the order they were
2288 entered on the command line. */
2289 section_addrs
->other
[sec_num
].name
= (char *) sec
;
2290 section_addrs
->other
[sec_num
].addr
= addr
;
2291 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2292 paddress (gdbarch
, addr
));
2295 /* The object's sections are initialized when a
2296 call is made to build_objfile_section_table (objfile).
2297 This happens in reread_symbols.
2298 At this point, we don't know what file type this is,
2299 so we can't determine what section names are valid. */
2301 section_addrs
->num_sections
= sec_num
;
2303 if (from_tty
&& (!query ("%s", "")))
2304 error (_("Not confirmed."));
2306 objf
= symbol_file_add (filename
.get (), add_flags
, section_addrs
, flags
);
2308 add_target_sections_of_objfile (objf
);
2310 /* Getting new symbols may change our opinion about what is
2312 reinit_frame_cache ();
2313 do_cleanups (my_cleanups
);
2317 /* This function removes a symbol file that was added via add-symbol-file. */
2320 remove_symbol_file_command (const char *args
, int from_tty
)
2322 struct objfile
*objf
= NULL
;
2323 struct program_space
*pspace
= current_program_space
;
2328 error (_("remove-symbol-file: no symbol file provided"));
2330 gdb_argv
argv (args
);
2332 if (strcmp (argv
[0], "-a") == 0)
2334 /* Interpret the next argument as an address. */
2337 if (argv
[1] == NULL
)
2338 error (_("Missing address argument"));
2340 if (argv
[2] != NULL
)
2341 error (_("Junk after %s"), argv
[1]);
2343 addr
= parse_and_eval_address (argv
[1]);
2347 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2348 && (objf
->flags
& OBJF_SHARED
) != 0
2349 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2353 else if (argv
[0] != NULL
)
2355 /* Interpret the current argument as a file name. */
2357 if (argv
[1] != NULL
)
2358 error (_("Junk after %s"), argv
[0]);
2360 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2364 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2365 && (objf
->flags
& OBJF_SHARED
) != 0
2366 && objf
->pspace
== pspace
2367 && filename_cmp (filename
.get (), objfile_name (objf
)) == 0)
2373 error (_("No symbol file found"));
2376 && !query (_("Remove symbol table from file \"%s\"? "),
2377 objfile_name (objf
)))
2378 error (_("Not confirmed."));
2380 free_objfile (objf
);
2381 clear_symtab_users (0);
2384 /* Re-read symbols if a symbol-file has changed. */
2387 reread_symbols (void)
2389 struct objfile
*objfile
;
2391 struct stat new_statbuf
;
2393 std::vector
<struct objfile
*> new_objfiles
;
2395 /* With the addition of shared libraries, this should be modified,
2396 the load time should be saved in the partial symbol tables, since
2397 different tables may come from different source files. FIXME.
2398 This routine should then walk down each partial symbol table
2399 and see if the symbol table that it originates from has been changed. */
2401 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2403 if (objfile
->obfd
== NULL
)
2406 /* Separate debug objfiles are handled in the main objfile. */
2407 if (objfile
->separate_debug_objfile_backlink
)
2410 /* If this object is from an archive (what you usually create with
2411 `ar', often called a `static library' on most systems, though
2412 a `shared library' on AIX is also an archive), then you should
2413 stat on the archive name, not member name. */
2414 if (objfile
->obfd
->my_archive
)
2415 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2417 res
= stat (objfile_name (objfile
), &new_statbuf
);
2420 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2421 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2422 objfile_name (objfile
));
2425 new_modtime
= new_statbuf
.st_mtime
;
2426 if (new_modtime
!= objfile
->mtime
)
2428 struct cleanup
*old_cleanups
;
2429 struct section_offsets
*offsets
;
2431 char *original_name
;
2433 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2434 objfile_name (objfile
));
2436 /* There are various functions like symbol_file_add,
2437 symfile_bfd_open, syms_from_objfile, etc., which might
2438 appear to do what we want. But they have various other
2439 effects which we *don't* want. So we just do stuff
2440 ourselves. We don't worry about mapped files (for one thing,
2441 any mapped file will be out of date). */
2443 /* If we get an error, blow away this objfile (not sure if
2444 that is the correct response for things like shared
2446 old_cleanups
= make_cleanup_free_objfile (objfile
);
2447 /* We need to do this whenever any symbols go away. */
2448 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2450 if (exec_bfd
!= NULL
2451 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2452 bfd_get_filename (exec_bfd
)) == 0)
2454 /* Reload EXEC_BFD without asking anything. */
2456 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2459 /* Keep the calls order approx. the same as in free_objfile. */
2461 /* Free the separate debug objfiles. It will be
2462 automatically recreated by sym_read. */
2463 free_objfile_separate_debug (objfile
);
2465 /* Remove any references to this objfile in the global
2467 preserve_values (objfile
);
2469 /* Nuke all the state that we will re-read. Much of the following
2470 code which sets things to NULL really is necessary to tell
2471 other parts of GDB that there is nothing currently there.
2473 Try to keep the freeing order compatible with free_objfile. */
2475 if (objfile
->sf
!= NULL
)
2477 (*objfile
->sf
->sym_finish
) (objfile
);
2480 clear_objfile_data (objfile
);
2482 /* Clean up any state BFD has sitting around. */
2484 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2485 char *obfd_filename
;
2487 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2488 /* Open the new BFD before freeing the old one, so that
2489 the filename remains live. */
2490 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2491 objfile
->obfd
= temp
.release ();
2492 if (objfile
->obfd
== NULL
)
2493 error (_("Can't open %s to read symbols."), obfd_filename
);
2496 original_name
= xstrdup (objfile
->original_name
);
2497 make_cleanup (xfree
, original_name
);
2499 /* bfd_openr sets cacheable to true, which is what we want. */
2500 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2501 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2502 bfd_errmsg (bfd_get_error ()));
2504 /* Save the offsets, we will nuke them with the rest of the
2506 num_offsets
= objfile
->num_sections
;
2507 offsets
= ((struct section_offsets
*)
2508 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2509 memcpy (offsets
, objfile
->section_offsets
,
2510 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2512 /* FIXME: Do we have to free a whole linked list, or is this
2514 if (objfile
->global_psymbols
.list
)
2515 xfree (objfile
->global_psymbols
.list
);
2516 memset (&objfile
->global_psymbols
, 0,
2517 sizeof (objfile
->global_psymbols
));
2518 if (objfile
->static_psymbols
.list
)
2519 xfree (objfile
->static_psymbols
.list
);
2520 memset (&objfile
->static_psymbols
, 0,
2521 sizeof (objfile
->static_psymbols
));
2523 /* Free the obstacks for non-reusable objfiles. */
2524 psymbol_bcache_free (objfile
->psymbol_cache
);
2525 objfile
->psymbol_cache
= psymbol_bcache_init ();
2527 /* NB: after this call to obstack_free, objfiles_changed
2528 will need to be called (see discussion below). */
2529 obstack_free (&objfile
->objfile_obstack
, 0);
2530 objfile
->sections
= NULL
;
2531 objfile
->compunit_symtabs
= NULL
;
2532 objfile
->psymtabs
= NULL
;
2533 objfile
->psymtabs_addrmap
= NULL
;
2534 objfile
->free_psymtabs
= NULL
;
2535 objfile
->template_symbols
= NULL
;
2537 /* obstack_init also initializes the obstack so it is
2538 empty. We could use obstack_specify_allocation but
2539 gdb_obstack.h specifies the alloc/dealloc functions. */
2540 obstack_init (&objfile
->objfile_obstack
);
2542 /* set_objfile_per_bfd potentially allocates the per-bfd
2543 data on the objfile's obstack (if sharing data across
2544 multiple users is not possible), so it's important to
2545 do it *after* the obstack has been initialized. */
2546 set_objfile_per_bfd (objfile
);
2548 objfile
->original_name
2549 = (char *) obstack_copy0 (&objfile
->objfile_obstack
, original_name
,
2550 strlen (original_name
));
2552 /* Reset the sym_fns pointer. The ELF reader can change it
2553 based on whether .gdb_index is present, and we need it to
2554 start over. PR symtab/15885 */
2555 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2557 build_objfile_section_table (objfile
);
2558 terminate_minimal_symbol_table (objfile
);
2560 /* We use the same section offsets as from last time. I'm not
2561 sure whether that is always correct for shared libraries. */
2562 objfile
->section_offsets
= (struct section_offsets
*)
2563 obstack_alloc (&objfile
->objfile_obstack
,
2564 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2565 memcpy (objfile
->section_offsets
, offsets
,
2566 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2567 objfile
->num_sections
= num_offsets
;
2569 /* What the hell is sym_new_init for, anyway? The concept of
2570 distinguishing between the main file and additional files
2571 in this way seems rather dubious. */
2572 if (objfile
== symfile_objfile
)
2574 (*objfile
->sf
->sym_new_init
) (objfile
);
2577 (*objfile
->sf
->sym_init
) (objfile
);
2578 clear_complaints (&symfile_complaints
, 1, 1);
2580 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2582 /* We are about to read new symbols and potentially also
2583 DWARF information. Some targets may want to pass addresses
2584 read from DWARF DIE's through an adjustment function before
2585 saving them, like MIPS, which may call into
2586 "find_pc_section". When called, that function will make
2587 use of per-objfile program space data.
2589 Since we discarded our section information above, we have
2590 dangling pointers in the per-objfile program space data
2591 structure. Force GDB to update the section mapping
2592 information by letting it know the objfile has changed,
2593 making the dangling pointers point to correct data
2596 objfiles_changed ();
2598 read_symbols (objfile
, 0);
2600 if (!objfile_has_symbols (objfile
))
2603 printf_unfiltered (_("(no debugging symbols found)\n"));
2607 /* We're done reading the symbol file; finish off complaints. */
2608 clear_complaints (&symfile_complaints
, 0, 1);
2610 /* Getting new symbols may change our opinion about what is
2613 reinit_frame_cache ();
2615 /* Discard cleanups as symbol reading was successful. */
2616 discard_cleanups (old_cleanups
);
2618 /* If the mtime has changed between the time we set new_modtime
2619 and now, we *want* this to be out of date, so don't call stat
2621 objfile
->mtime
= new_modtime
;
2622 init_entry_point_info (objfile
);
2624 new_objfiles
.push_back (objfile
);
2628 if (!new_objfiles
.empty ())
2630 clear_symtab_users (0);
2632 /* clear_objfile_data for each objfile was called before freeing it and
2633 observer_notify_new_objfile (NULL) has been called by
2634 clear_symtab_users above. Notify the new files now. */
2635 for (auto iter
: new_objfiles
)
2636 observer_notify_new_objfile (iter
);
2638 /* At least one objfile has changed, so we can consider that
2639 the executable we're debugging has changed too. */
2640 observer_notify_executable_changed ();
2649 } filename_language
;
2651 DEF_VEC_O (filename_language
);
2653 static VEC (filename_language
) *filename_language_table
;
2655 /* See symfile.h. */
2658 add_filename_language (const char *ext
, enum language lang
)
2660 filename_language entry
;
2662 entry
.ext
= xstrdup (ext
);
2665 VEC_safe_push (filename_language
, filename_language_table
, &entry
);
2668 static char *ext_args
;
2670 show_ext_args (struct ui_file
*file
, int from_tty
,
2671 struct cmd_list_element
*c
, const char *value
)
2673 fprintf_filtered (file
,
2674 _("Mapping between filename extension "
2675 "and source language is \"%s\".\n"),
2680 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2683 char *cp
= ext_args
;
2685 filename_language
*entry
;
2687 /* First arg is filename extension, starting with '.' */
2689 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2691 /* Find end of first arg. */
2692 while (*cp
&& !isspace (*cp
))
2696 error (_("'%s': two arguments required -- "
2697 "filename extension and language"),
2700 /* Null-terminate first arg. */
2703 /* Find beginning of second arg, which should be a source language. */
2704 cp
= skip_spaces (cp
);
2707 error (_("'%s': two arguments required -- "
2708 "filename extension and language"),
2711 /* Lookup the language from among those we know. */
2712 lang
= language_enum (cp
);
2714 /* Now lookup the filename extension: do we already know it? */
2716 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2719 if (0 == strcmp (ext_args
, entry
->ext
))
2725 /* New file extension. */
2726 add_filename_language (ext_args
, lang
);
2730 /* Redefining a previously known filename extension. */
2733 /* query ("Really make files of type %s '%s'?", */
2734 /* ext_args, language_str (lang)); */
2737 entry
->ext
= xstrdup (ext_args
);
2743 info_ext_lang_command (char *args
, int from_tty
)
2746 filename_language
*entry
;
2748 printf_filtered (_("Filename extensions and the languages they represent:"));
2749 printf_filtered ("\n\n");
2751 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2753 printf_filtered ("\t%s\t- %s\n", entry
->ext
, language_str (entry
->lang
));
2757 deduce_language_from_filename (const char *filename
)
2762 if (filename
!= NULL
)
2763 if ((cp
= strrchr (filename
, '.')) != NULL
)
2765 filename_language
*entry
;
2768 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2770 if (strcmp (cp
, entry
->ext
) == 0)
2774 return language_unknown
;
2777 /* Allocate and initialize a new symbol table.
2778 CUST is from the result of allocate_compunit_symtab. */
2781 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2783 struct objfile
*objfile
= cust
->objfile
;
2784 struct symtab
*symtab
2785 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2788 = (const char *) bcache (filename
, strlen (filename
) + 1,
2789 objfile
->per_bfd
->filename_cache
);
2790 symtab
->fullname
= NULL
;
2791 symtab
->language
= deduce_language_from_filename (filename
);
2793 /* This can be very verbose with lots of headers.
2794 Only print at higher debug levels. */
2795 if (symtab_create_debug
>= 2)
2797 /* Be a bit clever with debugging messages, and don't print objfile
2798 every time, only when it changes. */
2799 static char *last_objfile_name
= NULL
;
2801 if (last_objfile_name
== NULL
2802 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2804 xfree (last_objfile_name
);
2805 last_objfile_name
= xstrdup (objfile_name (objfile
));
2806 fprintf_unfiltered (gdb_stdlog
,
2807 "Creating one or more symtabs for objfile %s ...\n",
2810 fprintf_unfiltered (gdb_stdlog
,
2811 "Created symtab %s for module %s.\n",
2812 host_address_to_string (symtab
), filename
);
2815 /* Add it to CUST's list of symtabs. */
2816 if (cust
->filetabs
== NULL
)
2818 cust
->filetabs
= symtab
;
2819 cust
->last_filetab
= symtab
;
2823 cust
->last_filetab
->next
= symtab
;
2824 cust
->last_filetab
= symtab
;
2827 /* Backlink to the containing compunit symtab. */
2828 symtab
->compunit_symtab
= cust
;
2833 /* Allocate and initialize a new compunit.
2834 NAME is the name of the main source file, if there is one, or some
2835 descriptive text if there are no source files. */
2837 struct compunit_symtab
*
2838 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2840 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2841 struct compunit_symtab
);
2842 const char *saved_name
;
2844 cu
->objfile
= objfile
;
2846 /* The name we record here is only for display/debugging purposes.
2847 Just save the basename to avoid path issues (too long for display,
2848 relative vs absolute, etc.). */
2849 saved_name
= lbasename (name
);
2851 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2852 strlen (saved_name
));
2854 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2856 if (symtab_create_debug
)
2858 fprintf_unfiltered (gdb_stdlog
,
2859 "Created compunit symtab %s for %s.\n",
2860 host_address_to_string (cu
),
2867 /* Hook CU to the objfile it comes from. */
2870 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2872 cu
->next
= cu
->objfile
->compunit_symtabs
;
2873 cu
->objfile
->compunit_symtabs
= cu
;
2877 /* Reset all data structures in gdb which may contain references to
2878 symbol table data. */
2881 clear_symtab_users (symfile_add_flags add_flags
)
2883 /* Someday, we should do better than this, by only blowing away
2884 the things that really need to be blown. */
2886 /* Clear the "current" symtab first, because it is no longer valid.
2887 breakpoint_re_set may try to access the current symtab. */
2888 clear_current_source_symtab_and_line ();
2891 clear_last_displayed_sal ();
2892 clear_pc_function_cache ();
2893 observer_notify_new_objfile (NULL
);
2895 /* Clear globals which might have pointed into a removed objfile.
2896 FIXME: It's not clear which of these are supposed to persist
2897 between expressions and which ought to be reset each time. */
2898 expression_context_block
= NULL
;
2899 innermost_block
= NULL
;
2901 /* Varobj may refer to old symbols, perform a cleanup. */
2902 varobj_invalidate ();
2904 /* Now that the various caches have been cleared, we can re_set
2905 our breakpoints without risking it using stale data. */
2906 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2907 breakpoint_re_set ();
2911 clear_symtab_users_cleanup (void *ignore
)
2913 clear_symtab_users (0);
2917 The following code implements an abstraction for debugging overlay sections.
2919 The target model is as follows:
2920 1) The gnu linker will permit multiple sections to be mapped into the
2921 same VMA, each with its own unique LMA (or load address).
2922 2) It is assumed that some runtime mechanism exists for mapping the
2923 sections, one by one, from the load address into the VMA address.
2924 3) This code provides a mechanism for gdb to keep track of which
2925 sections should be considered to be mapped from the VMA to the LMA.
2926 This information is used for symbol lookup, and memory read/write.
2927 For instance, if a section has been mapped then its contents
2928 should be read from the VMA, otherwise from the LMA.
2930 Two levels of debugger support for overlays are available. One is
2931 "manual", in which the debugger relies on the user to tell it which
2932 overlays are currently mapped. This level of support is
2933 implemented entirely in the core debugger, and the information about
2934 whether a section is mapped is kept in the objfile->obj_section table.
2936 The second level of support is "automatic", and is only available if
2937 the target-specific code provides functionality to read the target's
2938 overlay mapping table, and translate its contents for the debugger
2939 (by updating the mapped state information in the obj_section tables).
2941 The interface is as follows:
2943 overlay map <name> -- tell gdb to consider this section mapped
2944 overlay unmap <name> -- tell gdb to consider this section unmapped
2945 overlay list -- list the sections that GDB thinks are mapped
2946 overlay read-target -- get the target's state of what's mapped
2947 overlay off/manual/auto -- set overlay debugging state
2948 Functional interface:
2949 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2950 section, return that section.
2951 find_pc_overlay(pc): find any overlay section that contains
2952 the pc, either in its VMA or its LMA
2953 section_is_mapped(sect): true if overlay is marked as mapped
2954 section_is_overlay(sect): true if section's VMA != LMA
2955 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2956 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2957 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2958 overlay_mapped_address(...): map an address from section's LMA to VMA
2959 overlay_unmapped_address(...): map an address from section's VMA to LMA
2960 symbol_overlayed_address(...): Return a "current" address for symbol:
2961 either in VMA or LMA depending on whether
2962 the symbol's section is currently mapped. */
2964 /* Overlay debugging state: */
2966 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2967 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2969 /* Function: section_is_overlay (SECTION)
2970 Returns true if SECTION has VMA not equal to LMA, ie.
2971 SECTION is loaded at an address different from where it will "run". */
2974 section_is_overlay (struct obj_section
*section
)
2976 if (overlay_debugging
&& section
)
2978 bfd
*abfd
= section
->objfile
->obfd
;
2979 asection
*bfd_section
= section
->the_bfd_section
;
2981 if (bfd_section_lma (abfd
, bfd_section
) != 0
2982 && bfd_section_lma (abfd
, bfd_section
)
2983 != bfd_section_vma (abfd
, bfd_section
))
2990 /* Function: overlay_invalidate_all (void)
2991 Invalidate the mapped state of all overlay sections (mark it as stale). */
2994 overlay_invalidate_all (void)
2996 struct objfile
*objfile
;
2997 struct obj_section
*sect
;
2999 ALL_OBJSECTIONS (objfile
, sect
)
3000 if (section_is_overlay (sect
))
3001 sect
->ovly_mapped
= -1;
3004 /* Function: section_is_mapped (SECTION)
3005 Returns true if section is an overlay, and is currently mapped.
3007 Access to the ovly_mapped flag is restricted to this function, so
3008 that we can do automatic update. If the global flag
3009 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3010 overlay_invalidate_all. If the mapped state of the particular
3011 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3014 section_is_mapped (struct obj_section
*osect
)
3016 struct gdbarch
*gdbarch
;
3018 if (osect
== 0 || !section_is_overlay (osect
))
3021 switch (overlay_debugging
)
3025 return 0; /* overlay debugging off */
3026 case ovly_auto
: /* overlay debugging automatic */
3027 /* Unles there is a gdbarch_overlay_update function,
3028 there's really nothing useful to do here (can't really go auto). */
3029 gdbarch
= get_objfile_arch (osect
->objfile
);
3030 if (gdbarch_overlay_update_p (gdbarch
))
3032 if (overlay_cache_invalid
)
3034 overlay_invalidate_all ();
3035 overlay_cache_invalid
= 0;
3037 if (osect
->ovly_mapped
== -1)
3038 gdbarch_overlay_update (gdbarch
, osect
);
3040 /* fall thru to manual case */
3041 case ovly_on
: /* overlay debugging manual */
3042 return osect
->ovly_mapped
== 1;
3046 /* Function: pc_in_unmapped_range
3047 If PC falls into the lma range of SECTION, return true, else false. */
3050 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3052 if (section_is_overlay (section
))
3054 bfd
*abfd
= section
->objfile
->obfd
;
3055 asection
*bfd_section
= section
->the_bfd_section
;
3057 /* We assume the LMA is relocated by the same offset as the VMA. */
3058 bfd_vma size
= bfd_get_section_size (bfd_section
);
3059 CORE_ADDR offset
= obj_section_offset (section
);
3061 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3062 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3069 /* Function: pc_in_mapped_range
3070 If PC falls into the vma range of SECTION, return true, else false. */
3073 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3075 if (section_is_overlay (section
))
3077 if (obj_section_addr (section
) <= pc
3078 && pc
< obj_section_endaddr (section
))
3085 /* Return true if the mapped ranges of sections A and B overlap, false
3089 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3091 CORE_ADDR a_start
= obj_section_addr (a
);
3092 CORE_ADDR a_end
= obj_section_endaddr (a
);
3093 CORE_ADDR b_start
= obj_section_addr (b
);
3094 CORE_ADDR b_end
= obj_section_endaddr (b
);
3096 return (a_start
< b_end
&& b_start
< a_end
);
3099 /* Function: overlay_unmapped_address (PC, SECTION)
3100 Returns the address corresponding to PC in the unmapped (load) range.
3101 May be the same as PC. */
3104 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3106 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3108 bfd
*abfd
= section
->objfile
->obfd
;
3109 asection
*bfd_section
= section
->the_bfd_section
;
3111 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3112 - bfd_section_vma (abfd
, bfd_section
);
3118 /* Function: overlay_mapped_address (PC, SECTION)
3119 Returns the address corresponding to PC in the mapped (runtime) range.
3120 May be the same as PC. */
3123 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3125 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3127 bfd
*abfd
= section
->objfile
->obfd
;
3128 asection
*bfd_section
= section
->the_bfd_section
;
3130 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3131 - bfd_section_lma (abfd
, bfd_section
);
3137 /* Function: symbol_overlayed_address
3138 Return one of two addresses (relative to the VMA or to the LMA),
3139 depending on whether the section is mapped or not. */
3142 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3144 if (overlay_debugging
)
3146 /* If the symbol has no section, just return its regular address. */
3149 /* If the symbol's section is not an overlay, just return its
3151 if (!section_is_overlay (section
))
3153 /* If the symbol's section is mapped, just return its address. */
3154 if (section_is_mapped (section
))
3157 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3158 * then return its LOADED address rather than its vma address!!
3160 return overlay_unmapped_address (address
, section
);
3165 /* Function: find_pc_overlay (PC)
3166 Return the best-match overlay section for PC:
3167 If PC matches a mapped overlay section's VMA, return that section.
3168 Else if PC matches an unmapped section's VMA, return that section.
3169 Else if PC matches an unmapped section's LMA, return that section. */
3171 struct obj_section
*
3172 find_pc_overlay (CORE_ADDR pc
)
3174 struct objfile
*objfile
;
3175 struct obj_section
*osect
, *best_match
= NULL
;
3177 if (overlay_debugging
)
3179 ALL_OBJSECTIONS (objfile
, osect
)
3180 if (section_is_overlay (osect
))
3182 if (pc_in_mapped_range (pc
, osect
))
3184 if (section_is_mapped (osect
))
3189 else if (pc_in_unmapped_range (pc
, osect
))
3196 /* Function: find_pc_mapped_section (PC)
3197 If PC falls into the VMA address range of an overlay section that is
3198 currently marked as MAPPED, return that section. Else return NULL. */
3200 struct obj_section
*
3201 find_pc_mapped_section (CORE_ADDR pc
)
3203 struct objfile
*objfile
;
3204 struct obj_section
*osect
;
3206 if (overlay_debugging
)
3208 ALL_OBJSECTIONS (objfile
, osect
)
3209 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3216 /* Function: list_overlays_command
3217 Print a list of mapped sections and their PC ranges. */
3220 list_overlays_command (const char *args
, int from_tty
)
3223 struct objfile
*objfile
;
3224 struct obj_section
*osect
;
3226 if (overlay_debugging
)
3228 ALL_OBJSECTIONS (objfile
, osect
)
3229 if (section_is_mapped (osect
))
3231 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3236 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3237 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3238 size
= bfd_get_section_size (osect
->the_bfd_section
);
3239 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3241 printf_filtered ("Section %s, loaded at ", name
);
3242 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3243 puts_filtered (" - ");
3244 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3245 printf_filtered (", mapped at ");
3246 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3247 puts_filtered (" - ");
3248 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3249 puts_filtered ("\n");
3255 printf_filtered (_("No sections are mapped.\n"));
3258 /* Function: map_overlay_command
3259 Mark the named section as mapped (ie. residing at its VMA address). */
3262 map_overlay_command (const char *args
, int from_tty
)
3264 struct objfile
*objfile
, *objfile2
;
3265 struct obj_section
*sec
, *sec2
;
3267 if (!overlay_debugging
)
3268 error (_("Overlay debugging not enabled. Use "
3269 "either the 'overlay auto' or\n"
3270 "the 'overlay manual' command."));
3272 if (args
== 0 || *args
== 0)
3273 error (_("Argument required: name of an overlay section"));
3275 /* First, find a section matching the user supplied argument. */
3276 ALL_OBJSECTIONS (objfile
, sec
)
3277 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3279 /* Now, check to see if the section is an overlay. */
3280 if (!section_is_overlay (sec
))
3281 continue; /* not an overlay section */
3283 /* Mark the overlay as "mapped". */
3284 sec
->ovly_mapped
= 1;
3286 /* Next, make a pass and unmap any sections that are
3287 overlapped by this new section: */
3288 ALL_OBJSECTIONS (objfile2
, sec2
)
3289 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3292 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3293 bfd_section_name (objfile
->obfd
,
3294 sec2
->the_bfd_section
));
3295 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3299 error (_("No overlay section called %s"), args
);
3302 /* Function: unmap_overlay_command
3303 Mark the overlay section as unmapped
3304 (ie. resident in its LMA address range, rather than the VMA range). */
3307 unmap_overlay_command (const char *args
, int from_tty
)
3309 struct objfile
*objfile
;
3310 struct obj_section
*sec
= NULL
;
3312 if (!overlay_debugging
)
3313 error (_("Overlay debugging not enabled. "
3314 "Use either the 'overlay auto' or\n"
3315 "the 'overlay manual' command."));
3317 if (args
== 0 || *args
== 0)
3318 error (_("Argument required: name of an overlay section"));
3320 /* First, find a section matching the user supplied argument. */
3321 ALL_OBJSECTIONS (objfile
, sec
)
3322 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3324 if (!sec
->ovly_mapped
)
3325 error (_("Section %s is not mapped"), args
);
3326 sec
->ovly_mapped
= 0;
3329 error (_("No overlay section called %s"), args
);
3332 /* Function: overlay_auto_command
3333 A utility command to turn on overlay debugging.
3334 Possibly this should be done via a set/show command. */
3337 overlay_auto_command (const char *args
, int from_tty
)
3339 overlay_debugging
= ovly_auto
;
3340 enable_overlay_breakpoints ();
3342 printf_unfiltered (_("Automatic overlay debugging enabled."));
3345 /* Function: overlay_manual_command
3346 A utility command to turn on overlay debugging.
3347 Possibly this should be done via a set/show command. */
3350 overlay_manual_command (const char *args
, int from_tty
)
3352 overlay_debugging
= ovly_on
;
3353 disable_overlay_breakpoints ();
3355 printf_unfiltered (_("Overlay debugging enabled."));
3358 /* Function: overlay_off_command
3359 A utility command to turn on overlay debugging.
3360 Possibly this should be done via a set/show command. */
3363 overlay_off_command (const char *args
, int from_tty
)
3365 overlay_debugging
= ovly_off
;
3366 disable_overlay_breakpoints ();
3368 printf_unfiltered (_("Overlay debugging disabled."));
3372 overlay_load_command (const char *args
, int from_tty
)
3374 struct gdbarch
*gdbarch
= get_current_arch ();
3376 if (gdbarch_overlay_update_p (gdbarch
))
3377 gdbarch_overlay_update (gdbarch
, NULL
);
3379 error (_("This target does not know how to read its overlay state."));
3382 /* Function: overlay_command
3383 A place-holder for a mis-typed command. */
3385 /* Command list chain containing all defined "overlay" subcommands. */
3386 static struct cmd_list_element
*overlaylist
;
3389 overlay_command (const char *args
, int from_tty
)
3392 ("\"overlay\" must be followed by the name of an overlay command.\n");
3393 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3396 /* Target Overlays for the "Simplest" overlay manager:
3398 This is GDB's default target overlay layer. It works with the
3399 minimal overlay manager supplied as an example by Cygnus. The
3400 entry point is via a function pointer "gdbarch_overlay_update",
3401 so targets that use a different runtime overlay manager can
3402 substitute their own overlay_update function and take over the
3405 The overlay_update function pokes around in the target's data structures
3406 to see what overlays are mapped, and updates GDB's overlay mapping with
3409 In this simple implementation, the target data structures are as follows:
3410 unsigned _novlys; /# number of overlay sections #/
3411 unsigned _ovly_table[_novlys][4] = {
3412 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3413 {..., ..., ..., ...},
3415 unsigned _novly_regions; /# number of overlay regions #/
3416 unsigned _ovly_region_table[_novly_regions][3] = {
3417 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3420 These functions will attempt to update GDB's mappedness state in the
3421 symbol section table, based on the target's mappedness state.
3423 To do this, we keep a cached copy of the target's _ovly_table, and
3424 attempt to detect when the cached copy is invalidated. The main
3425 entry point is "simple_overlay_update(SECT), which looks up SECT in
3426 the cached table and re-reads only the entry for that section from
3427 the target (whenever possible). */
3429 /* Cached, dynamically allocated copies of the target data structures: */
3430 static unsigned (*cache_ovly_table
)[4] = 0;
3431 static unsigned cache_novlys
= 0;
3432 static CORE_ADDR cache_ovly_table_base
= 0;
3435 VMA
, OSIZE
, LMA
, MAPPED
3438 /* Throw away the cached copy of _ovly_table. */
3441 simple_free_overlay_table (void)
3443 if (cache_ovly_table
)
3444 xfree (cache_ovly_table
);
3446 cache_ovly_table
= NULL
;
3447 cache_ovly_table_base
= 0;
3450 /* Read an array of ints of size SIZE from the target into a local buffer.
3451 Convert to host order. int LEN is number of ints. */
3454 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3455 int len
, int size
, enum bfd_endian byte_order
)
3457 /* FIXME (alloca): Not safe if array is very large. */
3458 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3461 read_memory (memaddr
, buf
, len
* size
);
3462 for (i
= 0; i
< len
; i
++)
3463 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3466 /* Find and grab a copy of the target _ovly_table
3467 (and _novlys, which is needed for the table's size). */
3470 simple_read_overlay_table (void)
3472 struct bound_minimal_symbol novlys_msym
;
3473 struct bound_minimal_symbol ovly_table_msym
;
3474 struct gdbarch
*gdbarch
;
3476 enum bfd_endian byte_order
;
3478 simple_free_overlay_table ();
3479 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3480 if (! novlys_msym
.minsym
)
3482 error (_("Error reading inferior's overlay table: "
3483 "couldn't find `_novlys' variable\n"
3484 "in inferior. Use `overlay manual' mode."));
3488 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3489 if (! ovly_table_msym
.minsym
)
3491 error (_("Error reading inferior's overlay table: couldn't find "
3492 "`_ovly_table' array\n"
3493 "in inferior. Use `overlay manual' mode."));
3497 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3498 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3499 byte_order
= gdbarch_byte_order (gdbarch
);
3501 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3504 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3505 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3506 read_target_long_array (cache_ovly_table_base
,
3507 (unsigned int *) cache_ovly_table
,
3508 cache_novlys
* 4, word_size
, byte_order
);
3510 return 1; /* SUCCESS */
3513 /* Function: simple_overlay_update_1
3514 A helper function for simple_overlay_update. Assuming a cached copy
3515 of _ovly_table exists, look through it to find an entry whose vma,
3516 lma and size match those of OSECT. Re-read the entry and make sure
3517 it still matches OSECT (else the table may no longer be valid).
3518 Set OSECT's mapped state to match the entry. Return: 1 for
3519 success, 0 for failure. */
3522 simple_overlay_update_1 (struct obj_section
*osect
)
3525 bfd
*obfd
= osect
->objfile
->obfd
;
3526 asection
*bsect
= osect
->the_bfd_section
;
3527 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3528 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3529 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3531 for (i
= 0; i
< cache_novlys
; i
++)
3532 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3533 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3535 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3536 (unsigned int *) cache_ovly_table
[i
],
3537 4, word_size
, byte_order
);
3538 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3539 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3541 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3544 else /* Warning! Warning! Target's ovly table has changed! */
3550 /* Function: simple_overlay_update
3551 If OSECT is NULL, then update all sections' mapped state
3552 (after re-reading the entire target _ovly_table).
3553 If OSECT is non-NULL, then try to find a matching entry in the
3554 cached ovly_table and update only OSECT's mapped state.
3555 If a cached entry can't be found or the cache isn't valid, then
3556 re-read the entire cache, and go ahead and update all sections. */
3559 simple_overlay_update (struct obj_section
*osect
)
3561 struct objfile
*objfile
;
3563 /* Were we given an osect to look up? NULL means do all of them. */
3565 /* Have we got a cached copy of the target's overlay table? */
3566 if (cache_ovly_table
!= NULL
)
3568 /* Does its cached location match what's currently in the
3570 struct bound_minimal_symbol minsym
3571 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3573 if (minsym
.minsym
== NULL
)
3574 error (_("Error reading inferior's overlay table: couldn't "
3575 "find `_ovly_table' array\n"
3576 "in inferior. Use `overlay manual' mode."));
3578 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3579 /* Then go ahead and try to look up this single section in
3581 if (simple_overlay_update_1 (osect
))
3582 /* Found it! We're done. */
3586 /* Cached table no good: need to read the entire table anew.
3587 Or else we want all the sections, in which case it's actually
3588 more efficient to read the whole table in one block anyway. */
3590 if (! simple_read_overlay_table ())
3593 /* Now may as well update all sections, even if only one was requested. */
3594 ALL_OBJSECTIONS (objfile
, osect
)
3595 if (section_is_overlay (osect
))
3598 bfd
*obfd
= osect
->objfile
->obfd
;
3599 asection
*bsect
= osect
->the_bfd_section
;
3601 for (i
= 0; i
< cache_novlys
; i
++)
3602 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3603 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3604 { /* obj_section matches i'th entry in ovly_table. */
3605 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3606 break; /* finished with inner for loop: break out. */
3611 /* Set the output sections and output offsets for section SECTP in
3612 ABFD. The relocation code in BFD will read these offsets, so we
3613 need to be sure they're initialized. We map each section to itself,
3614 with no offset; this means that SECTP->vma will be honored. */
3617 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3619 sectp
->output_section
= sectp
;
3620 sectp
->output_offset
= 0;
3623 /* Default implementation for sym_relocate. */
3626 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3629 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3631 bfd
*abfd
= sectp
->owner
;
3633 /* We're only interested in sections with relocation
3635 if ((sectp
->flags
& SEC_RELOC
) == 0)
3638 /* We will handle section offsets properly elsewhere, so relocate as if
3639 all sections begin at 0. */
3640 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3642 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3645 /* Relocate the contents of a debug section SECTP in ABFD. The
3646 contents are stored in BUF if it is non-NULL, or returned in a
3647 malloc'd buffer otherwise.
3649 For some platforms and debug info formats, shared libraries contain
3650 relocations against the debug sections (particularly for DWARF-2;
3651 one affected platform is PowerPC GNU/Linux, although it depends on
3652 the version of the linker in use). Also, ELF object files naturally
3653 have unresolved relocations for their debug sections. We need to apply
3654 the relocations in order to get the locations of symbols correct.
3655 Another example that may require relocation processing, is the
3656 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3660 symfile_relocate_debug_section (struct objfile
*objfile
,
3661 asection
*sectp
, bfd_byte
*buf
)
3663 gdb_assert (objfile
->sf
->sym_relocate
);
3665 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3668 struct symfile_segment_data
*
3669 get_symfile_segment_data (bfd
*abfd
)
3671 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3676 return sf
->sym_segments (abfd
);
3680 free_symfile_segment_data (struct symfile_segment_data
*data
)
3682 xfree (data
->segment_bases
);
3683 xfree (data
->segment_sizes
);
3684 xfree (data
->segment_info
);
3689 - DATA, containing segment addresses from the object file ABFD, and
3690 the mapping from ABFD's sections onto the segments that own them,
3692 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3693 segment addresses reported by the target,
3694 store the appropriate offsets for each section in OFFSETS.
3696 If there are fewer entries in SEGMENT_BASES than there are segments
3697 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3699 If there are more entries, then ignore the extra. The target may
3700 not be able to distinguish between an empty data segment and a
3701 missing data segment; a missing text segment is less plausible. */
3704 symfile_map_offsets_to_segments (bfd
*abfd
,
3705 const struct symfile_segment_data
*data
,
3706 struct section_offsets
*offsets
,
3707 int num_segment_bases
,
3708 const CORE_ADDR
*segment_bases
)
3713 /* It doesn't make sense to call this function unless you have some
3714 segment base addresses. */
3715 gdb_assert (num_segment_bases
> 0);
3717 /* If we do not have segment mappings for the object file, we
3718 can not relocate it by segments. */
3719 gdb_assert (data
!= NULL
);
3720 gdb_assert (data
->num_segments
> 0);
3722 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3724 int which
= data
->segment_info
[i
];
3726 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3728 /* Don't bother computing offsets for sections that aren't
3729 loaded as part of any segment. */
3733 /* Use the last SEGMENT_BASES entry as the address of any extra
3734 segments mentioned in DATA->segment_info. */
3735 if (which
> num_segment_bases
)
3736 which
= num_segment_bases
;
3738 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3739 - data
->segment_bases
[which
- 1]);
3746 symfile_find_segment_sections (struct objfile
*objfile
)
3748 bfd
*abfd
= objfile
->obfd
;
3751 struct symfile_segment_data
*data
;
3753 data
= get_symfile_segment_data (objfile
->obfd
);
3757 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3759 free_symfile_segment_data (data
);
3763 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3765 int which
= data
->segment_info
[i
];
3769 if (objfile
->sect_index_text
== -1)
3770 objfile
->sect_index_text
= sect
->index
;
3772 if (objfile
->sect_index_rodata
== -1)
3773 objfile
->sect_index_rodata
= sect
->index
;
3775 else if (which
== 2)
3777 if (objfile
->sect_index_data
== -1)
3778 objfile
->sect_index_data
= sect
->index
;
3780 if (objfile
->sect_index_bss
== -1)
3781 objfile
->sect_index_bss
= sect
->index
;
3785 free_symfile_segment_data (data
);
3788 /* Listen for free_objfile events. */
3791 symfile_free_objfile (struct objfile
*objfile
)
3793 /* Remove the target sections owned by this objfile. */
3794 if (objfile
!= NULL
)
3795 remove_target_sections ((void *) objfile
);
3798 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3799 Expand all symtabs that match the specified criteria.
3800 See quick_symbol_functions.expand_symtabs_matching for details. */
3803 expand_symtabs_matching
3804 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3805 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3806 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3807 enum search_domain kind
)
3809 struct objfile
*objfile
;
3811 ALL_OBJFILES (objfile
)
3814 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3816 expansion_notify
, kind
);
3820 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3821 Map function FUN over every file.
3822 See quick_symbol_functions.map_symbol_filenames for details. */
3825 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3828 struct objfile
*objfile
;
3830 ALL_OBJFILES (objfile
)
3833 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3839 _initialize_symfile (void)
3841 struct cmd_list_element
*c
;
3843 observer_attach_free_objfile (symfile_free_objfile
);
3845 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3846 Load symbol table from executable file FILE.\n\
3847 The `file' command can also load symbol tables, as well as setting the file\n\
3848 to execute."), &cmdlist
);
3849 set_cmd_completer (c
, filename_completer
);
3851 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3852 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3853 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3854 ...]\nADDR is the starting address of the file's text.\n\
3855 The optional arguments are section-name section-address pairs and\n\
3856 should be specified if the data and bss segments are not contiguous\n\
3857 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3859 set_cmd_completer (c
, filename_completer
);
3861 c
= add_cmd ("remove-symbol-file", class_files
,
3862 remove_symbol_file_command
, _("\
3863 Remove a symbol file added via the add-symbol-file command.\n\
3864 Usage: remove-symbol-file FILENAME\n\
3865 remove-symbol-file -a ADDRESS\n\
3866 The file to remove can be identified by its filename or by an address\n\
3867 that lies within the boundaries of this symbol file in memory."),
3870 c
= add_cmd ("load", class_files
, load_command
, _("\
3871 Dynamically load FILE into the running program, and record its symbols\n\
3872 for access from GDB.\n\
3873 An optional load OFFSET may also be given as a literal address.\n\
3874 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3876 Usage: load [FILE] [OFFSET]"), &cmdlist
);
3877 set_cmd_completer (c
, filename_completer
);
3879 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3880 _("Commands for debugging overlays."), &overlaylist
,
3881 "overlay ", 0, &cmdlist
);
3883 add_com_alias ("ovly", "overlay", class_alias
, 1);
3884 add_com_alias ("ov", "overlay", class_alias
, 1);
3886 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3887 _("Assert that an overlay section is mapped."), &overlaylist
);
3889 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3890 _("Assert that an overlay section is unmapped."), &overlaylist
);
3892 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3893 _("List mappings of overlay sections."), &overlaylist
);
3895 add_cmd ("manual", class_support
, overlay_manual_command
,
3896 _("Enable overlay debugging."), &overlaylist
);
3897 add_cmd ("off", class_support
, overlay_off_command
,
3898 _("Disable overlay debugging."), &overlaylist
);
3899 add_cmd ("auto", class_support
, overlay_auto_command
,
3900 _("Enable automatic overlay debugging."), &overlaylist
);
3901 add_cmd ("load-target", class_support
, overlay_load_command
,
3902 _("Read the overlay mapping state from the target."), &overlaylist
);
3904 /* Filename extension to source language lookup table: */
3905 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3907 Set mapping between filename extension and source language."), _("\
3908 Show mapping between filename extension and source language."), _("\
3909 Usage: set extension-language .foo bar"),
3910 set_ext_lang_command
,
3912 &setlist
, &showlist
);
3914 add_info ("extensions", info_ext_lang_command
,
3915 _("All filename extensions associated with a source language."));
3917 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3918 &debug_file_directory
, _("\
3919 Set the directories where separate debug symbols are searched for."), _("\
3920 Show the directories where separate debug symbols are searched for."), _("\
3921 Separate debug symbols are first searched for in the same\n\
3922 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3923 and lastly at the path of the directory of the binary with\n\
3924 each global debug-file-directory component prepended."),
3926 show_debug_file_directory
,
3927 &setlist
, &showlist
);
3929 add_setshow_enum_cmd ("symbol-loading", no_class
,
3930 print_symbol_loading_enums
, &print_symbol_loading
,
3932 Set printing of symbol loading messages."), _("\
3933 Show printing of symbol loading messages."), _("\
3934 off == turn all messages off\n\
3935 brief == print messages for the executable,\n\
3936 and brief messages for shared libraries\n\
3937 full == print messages for the executable,\n\
3938 and messages for each shared library."),
3941 &setprintlist
, &showprintlist
);
3943 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3944 &separate_debug_file_debug
, _("\
3945 Set printing of separate debug info file search debug."), _("\
3946 Show printing of separate debug info file search debug."), _("\
3947 When on, GDB prints the searched locations while looking for separate debug \
3948 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);