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 overlay_command (char *, int);
97 static void simple_free_overlay_table (void);
99 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
102 static int simple_read_overlay_table (void);
104 static int simple_overlay_update_1 (struct obj_section
*);
106 static void info_ext_lang_command (char *args
, int from_tty
);
108 static void symfile_find_segment_sections (struct objfile
*objfile
);
110 /* List of all available sym_fns. On gdb startup, each object file reader
111 calls add_symtab_fns() to register information on each format it is
114 struct registered_sym_fns
116 registered_sym_fns (bfd_flavour sym_flavour_
, const struct sym_fns
*sym_fns_
)
117 : sym_flavour (sym_flavour_
), sym_fns (sym_fns_
)
120 /* BFD flavour that we handle. */
121 enum bfd_flavour sym_flavour
;
123 /* The "vtable" of symbol functions. */
124 const struct sym_fns
*sym_fns
;
127 static std::vector
<registered_sym_fns
> symtab_fns
;
129 /* Values for "set print symbol-loading". */
131 const char print_symbol_loading_off
[] = "off";
132 const char print_symbol_loading_brief
[] = "brief";
133 const char print_symbol_loading_full
[] = "full";
134 static const char *print_symbol_loading_enums
[] =
136 print_symbol_loading_off
,
137 print_symbol_loading_brief
,
138 print_symbol_loading_full
,
141 static const char *print_symbol_loading
= print_symbol_loading_full
;
143 /* If non-zero, shared library symbols will be added automatically
144 when the inferior is created, new libraries are loaded, or when
145 attaching to the inferior. This is almost always what users will
146 want to have happen; but for very large programs, the startup time
147 will be excessive, and so if this is a problem, the user can clear
148 this flag and then add the shared library symbols as needed. Note
149 that there is a potential for confusion, since if the shared
150 library symbols are not loaded, commands like "info fun" will *not*
151 report all the functions that are actually present. */
153 int auto_solib_add
= 1;
156 /* Return non-zero if symbol-loading messages should be printed.
157 FROM_TTY is the standard from_tty argument to gdb commands.
158 If EXEC is non-zero the messages are for the executable.
159 Otherwise, messages are for shared libraries.
160 If FULL is non-zero then the caller is printing a detailed message.
161 E.g., the message includes the shared library name.
162 Otherwise, the caller is printing a brief "summary" message. */
165 print_symbol_loading_p (int from_tty
, int exec
, int full
)
167 if (!from_tty
&& !info_verbose
)
172 /* We don't check FULL for executables, there are few such
173 messages, therefore brief == full. */
174 return print_symbol_loading
!= print_symbol_loading_off
;
177 return print_symbol_loading
== print_symbol_loading_full
;
178 return print_symbol_loading
== print_symbol_loading_brief
;
181 /* True if we are reading a symbol table. */
183 int currently_reading_symtab
= 0;
185 /* Increment currently_reading_symtab and return a cleanup that can be
186 used to decrement it. */
188 scoped_restore_tmpl
<int>
189 increment_reading_symtab (void)
191 gdb_assert (currently_reading_symtab
>= 0);
192 return make_scoped_restore (¤tly_reading_symtab
,
193 currently_reading_symtab
+ 1);
196 /* Remember the lowest-addressed loadable section we've seen.
197 This function is called via bfd_map_over_sections.
199 In case of equal vmas, the section with the largest size becomes the
200 lowest-addressed loadable section.
202 If the vmas and sizes are equal, the last section is considered the
203 lowest-addressed loadable section. */
206 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
208 asection
**lowest
= (asection
**) obj
;
210 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
213 *lowest
= sect
; /* First loadable section */
214 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
215 *lowest
= sect
; /* A lower loadable section */
216 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
217 && (bfd_section_size (abfd
, (*lowest
))
218 <= bfd_section_size (abfd
, sect
)))
222 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
223 new object's 'num_sections' field is set to 0; it must be updated
226 struct section_addr_info
*
227 alloc_section_addr_info (size_t num_sections
)
229 struct section_addr_info
*sap
;
232 size
= (sizeof (struct section_addr_info
)
233 + sizeof (struct other_sections
) * (num_sections
- 1));
234 sap
= (struct section_addr_info
*) xmalloc (size
);
235 memset (sap
, 0, size
);
240 /* Build (allocate and populate) a section_addr_info struct from
241 an existing section table. */
243 extern struct section_addr_info
*
244 build_section_addr_info_from_section_table (const struct target_section
*start
,
245 const struct target_section
*end
)
247 struct section_addr_info
*sap
;
248 const struct target_section
*stp
;
251 sap
= alloc_section_addr_info (end
- start
);
253 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
255 struct bfd_section
*asect
= stp
->the_bfd_section
;
256 bfd
*abfd
= asect
->owner
;
258 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
259 && oidx
< end
- start
)
261 sap
->other
[oidx
].addr
= stp
->addr
;
262 sap
->other
[oidx
].name
= xstrdup (bfd_section_name (abfd
, asect
));
263 sap
->other
[oidx
].sectindex
= gdb_bfd_section_index (abfd
, asect
);
268 sap
->num_sections
= oidx
;
273 /* Create a section_addr_info from section offsets in ABFD. */
275 static struct section_addr_info
*
276 build_section_addr_info_from_bfd (bfd
*abfd
)
278 struct section_addr_info
*sap
;
280 struct bfd_section
*sec
;
282 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
283 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
284 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
286 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
287 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
288 sap
->other
[i
].sectindex
= gdb_bfd_section_index (abfd
, sec
);
292 sap
->num_sections
= i
;
297 /* Create a section_addr_info from section offsets in OBJFILE. */
299 struct section_addr_info
*
300 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
302 struct section_addr_info
*sap
;
305 /* Before reread_symbols gets rewritten it is not safe to call:
306 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
308 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
309 for (i
= 0; i
< sap
->num_sections
; i
++)
311 int sectindex
= sap
->other
[i
].sectindex
;
313 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
318 /* Free all memory allocated by build_section_addr_info_from_section_table. */
321 free_section_addr_info (struct section_addr_info
*sap
)
325 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
326 xfree (sap
->other
[idx
].name
);
330 /* Initialize OBJFILE's sect_index_* members. */
333 init_objfile_sect_indices (struct objfile
*objfile
)
338 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
340 objfile
->sect_index_text
= sect
->index
;
342 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
344 objfile
->sect_index_data
= sect
->index
;
346 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
348 objfile
->sect_index_bss
= sect
->index
;
350 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
352 objfile
->sect_index_rodata
= sect
->index
;
354 /* This is where things get really weird... We MUST have valid
355 indices for the various sect_index_* members or gdb will abort.
356 So if for example, there is no ".text" section, we have to
357 accomodate that. First, check for a file with the standard
358 one or two segments. */
360 symfile_find_segment_sections (objfile
);
362 /* Except when explicitly adding symbol files at some address,
363 section_offsets contains nothing but zeros, so it doesn't matter
364 which slot in section_offsets the individual sect_index_* members
365 index into. So if they are all zero, it is safe to just point
366 all the currently uninitialized indices to the first slot. But
367 beware: if this is the main executable, it may be relocated
368 later, e.g. by the remote qOffsets packet, and then this will
369 be wrong! That's why we try segments first. */
371 for (i
= 0; i
< objfile
->num_sections
; i
++)
373 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
378 if (i
== objfile
->num_sections
)
380 if (objfile
->sect_index_text
== -1)
381 objfile
->sect_index_text
= 0;
382 if (objfile
->sect_index_data
== -1)
383 objfile
->sect_index_data
= 0;
384 if (objfile
->sect_index_bss
== -1)
385 objfile
->sect_index_bss
= 0;
386 if (objfile
->sect_index_rodata
== -1)
387 objfile
->sect_index_rodata
= 0;
391 /* The arguments to place_section. */
393 struct place_section_arg
395 struct section_offsets
*offsets
;
399 /* Find a unique offset to use for loadable section SECT if
400 the user did not provide an offset. */
403 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
405 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
406 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
408 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
410 /* We are only interested in allocated sections. */
411 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
414 /* If the user specified an offset, honor it. */
415 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
418 /* Otherwise, let's try to find a place for the section. */
419 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
426 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
428 int indx
= cur_sec
->index
;
430 /* We don't need to compare against ourself. */
434 /* We can only conflict with allocated sections. */
435 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
438 /* If the section offset is 0, either the section has not been placed
439 yet, or it was the lowest section placed (in which case LOWEST
440 will be past its end). */
441 if (offsets
[indx
] == 0)
444 /* If this section would overlap us, then we must move up. */
445 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
446 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
448 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
449 start_addr
= (start_addr
+ align
- 1) & -align
;
454 /* Otherwise, we appear to be OK. So far. */
459 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
460 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
463 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
464 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
468 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
470 const struct section_addr_info
*addrs
)
474 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
476 /* Now calculate offsets for section that were specified by the caller. */
477 for (i
= 0; i
< addrs
->num_sections
; i
++)
479 const struct other_sections
*osp
;
481 osp
= &addrs
->other
[i
];
482 if (osp
->sectindex
== -1)
485 /* Record all sections in offsets. */
486 /* The section_offsets in the objfile are here filled in using
488 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
492 /* Transform section name S for a name comparison. prelink can split section
493 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
494 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
495 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
496 (`.sbss') section has invalid (increased) virtual address. */
499 addr_section_name (const char *s
)
501 if (strcmp (s
, ".dynbss") == 0)
503 if (strcmp (s
, ".sdynbss") == 0)
509 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
510 their (name, sectindex) pair. sectindex makes the sort by name stable. */
513 addrs_section_compar (const void *ap
, const void *bp
)
515 const struct other_sections
*a
= *((struct other_sections
**) ap
);
516 const struct other_sections
*b
= *((struct other_sections
**) bp
);
519 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
523 return a
->sectindex
- b
->sectindex
;
526 /* Provide sorted array of pointers to sections of ADDRS. The array is
527 terminated by NULL. Caller is responsible to call xfree for it. */
529 static struct other_sections
**
530 addrs_section_sort (struct section_addr_info
*addrs
)
532 struct other_sections
**array
;
535 /* `+ 1' for the NULL terminator. */
536 array
= XNEWVEC (struct other_sections
*, addrs
->num_sections
+ 1);
537 for (i
= 0; i
< addrs
->num_sections
; i
++)
538 array
[i
] = &addrs
->other
[i
];
541 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
546 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
547 also SECTINDEXes specific to ABFD there. This function can be used to
548 rebase ADDRS to start referencing different BFD than before. */
551 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
553 asection
*lower_sect
;
554 CORE_ADDR lower_offset
;
556 struct cleanup
*my_cleanup
;
557 struct section_addr_info
*abfd_addrs
;
558 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
559 struct other_sections
**addrs_to_abfd_addrs
;
561 /* Find lowest loadable section to be used as starting point for
562 continguous sections. */
564 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
565 if (lower_sect
== NULL
)
567 warning (_("no loadable sections found in added symbol-file %s"),
568 bfd_get_filename (abfd
));
572 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
574 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
575 in ABFD. Section names are not unique - there can be multiple sections of
576 the same name. Also the sections of the same name do not have to be
577 adjacent to each other. Some sections may be present only in one of the
578 files. Even sections present in both files do not have to be in the same
581 Use stable sort by name for the sections in both files. Then linearly
582 scan both lists matching as most of the entries as possible. */
584 addrs_sorted
= addrs_section_sort (addrs
);
585 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
587 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
588 make_cleanup_free_section_addr_info (abfd_addrs
);
589 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
590 make_cleanup (xfree
, abfd_addrs_sorted
);
592 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
593 ABFD_ADDRS_SORTED. */
595 addrs_to_abfd_addrs
= XCNEWVEC (struct other_sections
*, addrs
->num_sections
);
596 make_cleanup (xfree
, addrs_to_abfd_addrs
);
598 while (*addrs_sorted
)
600 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
602 while (*abfd_addrs_sorted
603 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
607 if (*abfd_addrs_sorted
608 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
613 /* Make the found item directly addressable from ADDRS. */
614 index_in_addrs
= *addrs_sorted
- addrs
->other
;
615 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
616 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
618 /* Never use the same ABFD entry twice. */
625 /* Calculate offsets for the loadable sections.
626 FIXME! Sections must be in order of increasing loadable section
627 so that contiguous sections can use the lower-offset!!!
629 Adjust offsets if the segments are not contiguous.
630 If the section is contiguous, its offset should be set to
631 the offset of the highest loadable section lower than it
632 (the loadable section directly below it in memory).
633 this_offset = lower_offset = lower_addr - lower_orig_addr */
635 for (i
= 0; i
< addrs
->num_sections
; i
++)
637 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
641 /* This is the index used by BFD. */
642 addrs
->other
[i
].sectindex
= sect
->sectindex
;
644 if (addrs
->other
[i
].addr
!= 0)
646 addrs
->other
[i
].addr
-= sect
->addr
;
647 lower_offset
= addrs
->other
[i
].addr
;
650 addrs
->other
[i
].addr
= lower_offset
;
654 /* addr_section_name transformation is not used for SECT_NAME. */
655 const char *sect_name
= addrs
->other
[i
].name
;
657 /* This section does not exist in ABFD, which is normally
658 unexpected and we want to issue a warning.
660 However, the ELF prelinker does create a few sections which are
661 marked in the main executable as loadable (they are loaded in
662 memory from the DYNAMIC segment) and yet are not present in
663 separate debug info files. This is fine, and should not cause
664 a warning. Shared libraries contain just the section
665 ".gnu.liblist" but it is not marked as loadable there. There is
666 no other way to identify them than by their name as the sections
667 created by prelink have no special flags.
669 For the sections `.bss' and `.sbss' see addr_section_name. */
671 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
672 || strcmp (sect_name
, ".gnu.conflict") == 0
673 || (strcmp (sect_name
, ".bss") == 0
675 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
676 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
677 || (strcmp (sect_name
, ".sbss") == 0
679 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
680 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
681 warning (_("section %s not found in %s"), sect_name
,
682 bfd_get_filename (abfd
));
684 addrs
->other
[i
].addr
= 0;
685 addrs
->other
[i
].sectindex
= -1;
689 do_cleanups (my_cleanup
);
692 /* Parse the user's idea of an offset for dynamic linking, into our idea
693 of how to represent it for fast symbol reading. This is the default
694 version of the sym_fns.sym_offsets function for symbol readers that
695 don't need to do anything special. It allocates a section_offsets table
696 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
699 default_symfile_offsets (struct objfile
*objfile
,
700 const struct section_addr_info
*addrs
)
702 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
703 objfile
->section_offsets
= (struct section_offsets
*)
704 obstack_alloc (&objfile
->objfile_obstack
,
705 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
706 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
707 objfile
->num_sections
, addrs
);
709 /* For relocatable files, all loadable sections will start at zero.
710 The zero is meaningless, so try to pick arbitrary addresses such
711 that no loadable sections overlap. This algorithm is quadratic,
712 but the number of sections in a single object file is generally
714 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
716 struct place_section_arg arg
;
717 bfd
*abfd
= objfile
->obfd
;
720 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
721 /* We do not expect this to happen; just skip this step if the
722 relocatable file has a section with an assigned VMA. */
723 if (bfd_section_vma (abfd
, cur_sec
) != 0)
728 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
730 /* Pick non-overlapping offsets for sections the user did not
732 arg
.offsets
= objfile
->section_offsets
;
734 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
736 /* Correctly filling in the section offsets is not quite
737 enough. Relocatable files have two properties that
738 (most) shared objects do not:
740 - Their debug information will contain relocations. Some
741 shared libraries do also, but many do not, so this can not
744 - If there are multiple code sections they will be loaded
745 at different relative addresses in memory than they are
746 in the objfile, since all sections in the file will start
749 Because GDB has very limited ability to map from an
750 address in debug info to the correct code section,
751 it relies on adding SECT_OFF_TEXT to things which might be
752 code. If we clear all the section offsets, and set the
753 section VMAs instead, then symfile_relocate_debug_section
754 will return meaningful debug information pointing at the
757 GDB has too many different data structures for section
758 addresses - a bfd, objfile, and so_list all have section
759 tables, as does exec_ops. Some of these could probably
762 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
763 cur_sec
= cur_sec
->next
)
765 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
768 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
769 exec_set_section_address (bfd_get_filename (abfd
),
771 offsets
[cur_sec
->index
]);
772 offsets
[cur_sec
->index
] = 0;
777 /* Remember the bfd indexes for the .text, .data, .bss and
779 init_objfile_sect_indices (objfile
);
782 /* Divide the file into segments, which are individual relocatable units.
783 This is the default version of the sym_fns.sym_segments function for
784 symbol readers that do not have an explicit representation of segments.
785 It assumes that object files do not have segments, and fully linked
786 files have a single segment. */
788 struct symfile_segment_data
*
789 default_symfile_segments (bfd
*abfd
)
793 struct symfile_segment_data
*data
;
796 /* Relocatable files contain enough information to position each
797 loadable section independently; they should not be relocated
799 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
802 /* Make sure there is at least one loadable section in the file. */
803 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
805 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
813 low
= bfd_get_section_vma (abfd
, sect
);
814 high
= low
+ bfd_get_section_size (sect
);
816 data
= XCNEW (struct symfile_segment_data
);
817 data
->num_segments
= 1;
818 data
->segment_bases
= XCNEW (CORE_ADDR
);
819 data
->segment_sizes
= XCNEW (CORE_ADDR
);
821 num_sections
= bfd_count_sections (abfd
);
822 data
->segment_info
= XCNEWVEC (int, num_sections
);
824 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
828 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
831 vma
= bfd_get_section_vma (abfd
, sect
);
834 if (vma
+ bfd_get_section_size (sect
) > high
)
835 high
= vma
+ bfd_get_section_size (sect
);
837 data
->segment_info
[i
] = 1;
840 data
->segment_bases
[0] = low
;
841 data
->segment_sizes
[0] = high
- low
;
846 /* This is a convenience function to call sym_read for OBJFILE and
847 possibly force the partial symbols to be read. */
850 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
852 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
853 objfile
->per_bfd
->minsyms_read
= true;
855 /* find_separate_debug_file_in_section should be called only if there is
856 single binary with no existing separate debug info file. */
857 if (!objfile_has_partial_symbols (objfile
)
858 && objfile
->separate_debug_objfile
== NULL
859 && objfile
->separate_debug_objfile_backlink
== NULL
)
861 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
865 /* find_separate_debug_file_in_section uses the same filename for the
866 virtual section-as-bfd like the bfd filename containing the
867 section. Therefore use also non-canonical name form for the same
868 file containing the section. */
869 symbol_file_add_separate (abfd
.get (), objfile
->original_name
,
873 if ((add_flags
& SYMFILE_NO_READ
) == 0)
874 require_partial_symbols (objfile
, 0);
877 /* Initialize entry point information for this objfile. */
880 init_entry_point_info (struct objfile
*objfile
)
882 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
888 /* Save startup file's range of PC addresses to help blockframe.c
889 decide where the bottom of the stack is. */
891 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
893 /* Executable file -- record its entry point so we'll recognize
894 the startup file because it contains the entry point. */
895 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
896 ei
->entry_point_p
= 1;
898 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
899 && bfd_get_start_address (objfile
->obfd
) != 0)
901 /* Some shared libraries may have entry points set and be
902 runnable. There's no clear way to indicate this, so just check
903 for values other than zero. */
904 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
905 ei
->entry_point_p
= 1;
909 /* Examination of non-executable.o files. Short-circuit this stuff. */
910 ei
->entry_point_p
= 0;
913 if (ei
->entry_point_p
)
915 struct obj_section
*osect
;
916 CORE_ADDR entry_point
= ei
->entry_point
;
919 /* Make certain that the address points at real code, and not a
920 function descriptor. */
922 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
926 /* Remove any ISA markers, so that this matches entries in the
929 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
932 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
934 struct bfd_section
*sect
= osect
->the_bfd_section
;
936 if (entry_point
>= bfd_get_section_vma (objfile
->obfd
, sect
)
937 && entry_point
< (bfd_get_section_vma (objfile
->obfd
, sect
)
938 + bfd_get_section_size (sect
)))
940 ei
->the_bfd_section_index
941 = gdb_bfd_section_index (objfile
->obfd
, sect
);
948 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
952 /* Process a symbol file, as either the main file or as a dynamically
955 This function does not set the OBJFILE's entry-point info.
957 OBJFILE is where the symbols are to be read from.
959 ADDRS is the list of section load addresses. If the user has given
960 an 'add-symbol-file' command, then this is the list of offsets and
961 addresses he or she provided as arguments to the command; or, if
962 we're handling a shared library, these are the actual addresses the
963 sections are loaded at, according to the inferior's dynamic linker
964 (as gleaned by GDB's shared library code). We convert each address
965 into an offset from the section VMA's as it appears in the object
966 file, and then call the file's sym_offsets function to convert this
967 into a format-specific offset table --- a `struct section_offsets'.
969 ADD_FLAGS encodes verbosity level, whether this is main symbol or
970 an extra symbol file such as dynamically loaded code, and wether
971 breakpoint reset should be deferred. */
974 syms_from_objfile_1 (struct objfile
*objfile
,
975 struct section_addr_info
*addrs
,
976 symfile_add_flags add_flags
)
978 struct section_addr_info
*local_addr
= NULL
;
979 struct cleanup
*old_chain
;
980 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
982 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
984 if (objfile
->sf
== NULL
)
986 /* No symbols to load, but we still need to make sure
987 that the section_offsets table is allocated. */
988 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
989 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
991 objfile
->num_sections
= num_sections
;
992 objfile
->section_offsets
993 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
995 memset (objfile
->section_offsets
, 0, size
);
999 /* Make sure that partially constructed symbol tables will be cleaned up
1000 if an error occurs during symbol reading. */
1001 old_chain
= make_cleanup_free_objfile (objfile
);
1003 /* If ADDRS is NULL, put together a dummy address list.
1004 We now establish the convention that an addr of zero means
1005 no load address was specified. */
1008 local_addr
= alloc_section_addr_info (1);
1009 make_cleanup (xfree
, local_addr
);
1015 /* We will modify the main symbol table, make sure that all its users
1016 will be cleaned up if an error occurs during symbol reading. */
1017 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1019 /* Since no error yet, throw away the old symbol table. */
1021 if (symfile_objfile
!= NULL
)
1023 free_objfile (symfile_objfile
);
1024 gdb_assert (symfile_objfile
== NULL
);
1027 /* Currently we keep symbols from the add-symbol-file command.
1028 If the user wants to get rid of them, they should do "symbol-file"
1029 without arguments first. Not sure this is the best behavior
1032 (*objfile
->sf
->sym_new_init
) (objfile
);
1035 /* Convert addr into an offset rather than an absolute address.
1036 We find the lowest address of a loaded segment in the objfile,
1037 and assume that <addr> is where that got loaded.
1039 We no longer warn if the lowest section is not a text segment (as
1040 happens for the PA64 port. */
1041 if (addrs
->num_sections
> 0)
1042 addr_info_make_relative (addrs
, objfile
->obfd
);
1044 /* Initialize symbol reading routines for this objfile, allow complaints to
1045 appear for this new file, and record how verbose to be, then do the
1046 initial symbol reading for this file. */
1048 (*objfile
->sf
->sym_init
) (objfile
);
1049 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1051 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1053 read_symbols (objfile
, add_flags
);
1055 /* Discard cleanups as symbol reading was successful. */
1057 discard_cleanups (old_chain
);
1061 /* Same as syms_from_objfile_1, but also initializes the objfile
1062 entry-point info. */
1065 syms_from_objfile (struct objfile
*objfile
,
1066 struct section_addr_info
*addrs
,
1067 symfile_add_flags add_flags
)
1069 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1070 init_entry_point_info (objfile
);
1073 /* Perform required actions after either reading in the initial
1074 symbols for a new objfile, or mapping in the symbols from a reusable
1075 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1078 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1080 /* If this is the main symbol file we have to clean up all users of the
1081 old main symbol file. Otherwise it is sufficient to fixup all the
1082 breakpoints that may have been redefined by this symbol file. */
1083 if (add_flags
& SYMFILE_MAINLINE
)
1085 /* OK, make it the "real" symbol file. */
1086 symfile_objfile
= objfile
;
1088 clear_symtab_users (add_flags
);
1090 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1092 breakpoint_re_set ();
1095 /* We're done reading the symbol file; finish off complaints. */
1096 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1099 /* Process a symbol file, as either the main file or as a dynamically
1102 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1103 A new reference is acquired by this function.
1105 For NAME description see allocate_objfile's definition.
1107 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1108 extra, such as dynamically loaded code, and what to do with breakpoins.
1110 ADDRS is as described for syms_from_objfile_1, above.
1111 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1113 PARENT is the original objfile if ABFD is a separate debug info file.
1114 Otherwise PARENT is NULL.
1116 Upon success, returns a pointer to the objfile that was added.
1117 Upon failure, jumps back to command level (never returns). */
1119 static struct objfile
*
1120 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1121 symfile_add_flags add_flags
,
1122 struct section_addr_info
*addrs
,
1123 objfile_flags flags
, struct objfile
*parent
)
1125 struct objfile
*objfile
;
1126 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1127 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1128 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1129 && (readnow_symbol_files
1130 || (add_flags
& SYMFILE_NO_READ
) == 0));
1132 if (readnow_symbol_files
)
1134 flags
|= OBJF_READNOW
;
1135 add_flags
&= ~SYMFILE_NO_READ
;
1138 /* Give user a chance to burp if we'd be
1139 interactively wiping out any existing symbols. */
1141 if ((have_full_symbols () || have_partial_symbols ())
1144 && !query (_("Load new symbol table from \"%s\"? "), name
))
1145 error (_("Not confirmed."));
1148 flags
|= OBJF_MAINLINE
;
1149 objfile
= allocate_objfile (abfd
, name
, flags
);
1152 add_separate_debug_objfile (objfile
, parent
);
1154 /* We either created a new mapped symbol table, mapped an existing
1155 symbol table file which has not had initial symbol reading
1156 performed, or need to read an unmapped symbol table. */
1159 if (deprecated_pre_add_symbol_hook
)
1160 deprecated_pre_add_symbol_hook (name
);
1163 printf_unfiltered (_("Reading symbols from %s..."), name
);
1165 gdb_flush (gdb_stdout
);
1168 syms_from_objfile (objfile
, addrs
, add_flags
);
1170 /* We now have at least a partial symbol table. Check to see if the
1171 user requested that all symbols be read on initial access via either
1172 the gdb startup command line or on a per symbol file basis. Expand
1173 all partial symbol tables for this objfile if so. */
1175 if ((flags
& OBJF_READNOW
))
1179 printf_unfiltered (_("expanding to full symbols..."));
1181 gdb_flush (gdb_stdout
);
1185 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1188 if (should_print
&& !objfile_has_symbols (objfile
))
1191 printf_unfiltered (_("(no debugging symbols found)..."));
1197 if (deprecated_post_add_symbol_hook
)
1198 deprecated_post_add_symbol_hook ();
1200 printf_unfiltered (_("done.\n"));
1203 /* We print some messages regardless of whether 'from_tty ||
1204 info_verbose' is true, so make sure they go out at the right
1206 gdb_flush (gdb_stdout
);
1208 if (objfile
->sf
== NULL
)
1210 observer_notify_new_objfile (objfile
);
1211 return objfile
; /* No symbols. */
1214 finish_new_objfile (objfile
, add_flags
);
1216 observer_notify_new_objfile (objfile
);
1218 bfd_cache_close_all ();
1222 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1223 see allocate_objfile's definition. */
1226 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1227 symfile_add_flags symfile_flags
,
1228 struct objfile
*objfile
)
1230 struct section_addr_info
*sap
;
1231 struct cleanup
*my_cleanup
;
1233 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1234 because sections of BFD may not match sections of OBJFILE and because
1235 vma may have been modified by tools such as prelink. */
1236 sap
= build_section_addr_info_from_objfile (objfile
);
1237 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1239 symbol_file_add_with_addrs
1240 (bfd
, name
, symfile_flags
, sap
,
1241 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1245 do_cleanups (my_cleanup
);
1248 /* Process the symbol file ABFD, as either the main file or as a
1249 dynamically loaded file.
1250 See symbol_file_add_with_addrs's comments for details. */
1253 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1254 symfile_add_flags add_flags
,
1255 struct section_addr_info
*addrs
,
1256 objfile_flags flags
, struct objfile
*parent
)
1258 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1262 /* Process a symbol file, as either the main file or as a dynamically
1263 loaded file. See symbol_file_add_with_addrs's comments for details. */
1266 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1267 struct section_addr_info
*addrs
, objfile_flags flags
)
1269 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1271 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1275 /* Call symbol_file_add() with default values and update whatever is
1276 affected by the loading of a new main().
1277 Used when the file is supplied in the gdb command line
1278 and by some targets with special loading requirements.
1279 The auxiliary function, symbol_file_add_main_1(), has the flags
1280 argument for the switches that can only be specified in the symbol_file
1284 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1286 symbol_file_add_main_1 (args
, add_flags
, 0);
1290 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1291 objfile_flags flags
)
1293 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1295 symbol_file_add (args
, add_flags
, NULL
, flags
);
1297 /* Getting new symbols may change our opinion about
1298 what is frameless. */
1299 reinit_frame_cache ();
1301 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1302 set_initial_language ();
1306 symbol_file_clear (int from_tty
)
1308 if ((have_full_symbols () || have_partial_symbols ())
1311 ? !query (_("Discard symbol table from `%s'? "),
1312 objfile_name (symfile_objfile
))
1313 : !query (_("Discard symbol table? "))))
1314 error (_("Not confirmed."));
1316 /* solib descriptors may have handles to objfiles. Wipe them before their
1317 objfiles get stale by free_all_objfiles. */
1318 no_shared_libraries (NULL
, from_tty
);
1320 free_all_objfiles ();
1322 gdb_assert (symfile_objfile
== NULL
);
1324 printf_unfiltered (_("No symbol file now.\n"));
1327 /* See symfile.h. */
1329 int separate_debug_file_debug
= 0;
1332 separate_debug_file_exists (const char *name
, unsigned long crc
,
1333 struct objfile
*parent_objfile
)
1335 unsigned long file_crc
;
1337 struct stat parent_stat
, abfd_stat
;
1338 int verified_as_different
;
1340 /* Find a separate debug info file as if symbols would be present in
1341 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1342 section can contain just the basename of PARENT_OBJFILE without any
1343 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1344 the separate debug infos with the same basename can exist. */
1346 if (filename_cmp (name
, objfile_name (parent_objfile
)) == 0)
1349 if (separate_debug_file_debug
)
1350 printf_unfiltered (_(" Trying %s\n"), name
);
1352 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
, gnutarget
, -1));
1357 /* Verify symlinks were not the cause of filename_cmp name difference above.
1359 Some operating systems, e.g. Windows, do not provide a meaningful
1360 st_ino; they always set it to zero. (Windows does provide a
1361 meaningful st_dev.) Files accessed from gdbservers that do not
1362 support the vFile:fstat packet will also have st_ino set to zero.
1363 Do not indicate a duplicate library in either case. While there
1364 is no guarantee that a system that provides meaningful inode
1365 numbers will never set st_ino to zero, this is merely an
1366 optimization, so we do not need to worry about false negatives. */
1368 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1369 && abfd_stat
.st_ino
!= 0
1370 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1372 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1373 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1375 verified_as_different
= 1;
1378 verified_as_different
= 0;
1380 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1385 if (crc
!= file_crc
)
1387 unsigned long parent_crc
;
1389 /* If the files could not be verified as different with
1390 bfd_stat then we need to calculate the parent's CRC
1391 to verify whether the files are different or not. */
1393 if (!verified_as_different
)
1395 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1399 if (verified_as_different
|| parent_crc
!= file_crc
)
1400 warning (_("the debug information found in \"%s\""
1401 " does not match \"%s\" (CRC mismatch).\n"),
1402 name
, objfile_name (parent_objfile
));
1410 char *debug_file_directory
= NULL
;
1412 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1413 struct cmd_list_element
*c
, const char *value
)
1415 fprintf_filtered (file
,
1416 _("The directory where separate debug "
1417 "symbols are searched for is \"%s\".\n"),
1421 #if ! defined (DEBUG_SUBDIRECTORY)
1422 #define DEBUG_SUBDIRECTORY ".debug"
1425 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1426 where the original file resides (may not be the same as
1427 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1428 looking for. CANON_DIR is the "realpath" form of DIR.
1429 DIR must contain a trailing '/'.
1430 Returns the path of the file with separate debug info, of NULL. */
1433 find_separate_debug_file (const char *dir
,
1434 const char *canon_dir
,
1435 const char *debuglink
,
1436 unsigned long crc32
, struct objfile
*objfile
)
1441 VEC (char_ptr
) *debugdir_vec
;
1442 struct cleanup
*back_to
;
1445 if (separate_debug_file_debug
)
1446 printf_unfiltered (_("\nLooking for separate debug info (debug link) for "
1447 "%s\n"), objfile_name (objfile
));
1449 /* Set I to std::max (strlen (canon_dir), strlen (dir)). */
1451 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1452 i
= strlen (canon_dir
);
1455 = (char *) xmalloc (strlen (debug_file_directory
) + 1
1457 + strlen (DEBUG_SUBDIRECTORY
)
1459 + strlen (debuglink
)
1462 /* First try in the same directory as the original file. */
1463 strcpy (debugfile
, dir
);
1464 strcat (debugfile
, debuglink
);
1466 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1469 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1470 strcpy (debugfile
, dir
);
1471 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1472 strcat (debugfile
, "/");
1473 strcat (debugfile
, debuglink
);
1475 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1478 /* Then try in the global debugfile directories.
1480 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1481 cause "/..." lookups. */
1483 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1484 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1486 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1488 strcpy (debugfile
, debugdir
);
1489 strcat (debugfile
, "/");
1490 strcat (debugfile
, dir
);
1491 strcat (debugfile
, debuglink
);
1493 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1495 do_cleanups (back_to
);
1499 /* If the file is in the sysroot, try using its base path in the
1500 global debugfile directory. */
1501 if (canon_dir
!= NULL
1502 && filename_ncmp (canon_dir
, gdb_sysroot
,
1503 strlen (gdb_sysroot
)) == 0
1504 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1506 strcpy (debugfile
, debugdir
);
1507 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1508 strcat (debugfile
, "/");
1509 strcat (debugfile
, debuglink
);
1511 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1513 do_cleanups (back_to
);
1519 do_cleanups (back_to
);
1524 /* Modify PATH to contain only "[/]directory/" part of PATH.
1525 If there were no directory separators in PATH, PATH will be empty
1526 string on return. */
1529 terminate_after_last_dir_separator (char *path
)
1533 /* Strip off the final filename part, leaving the directory name,
1534 followed by a slash. The directory can be relative or absolute. */
1535 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1536 if (IS_DIR_SEPARATOR (path
[i
]))
1539 /* If I is -1 then no directory is present there and DIR will be "". */
1543 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1544 Returns pathname, or NULL. */
1547 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1550 char *dir
, *canon_dir
;
1552 unsigned long crc32
;
1553 struct cleanup
*cleanups
;
1555 debuglink
= bfd_get_debug_link_info (objfile
->obfd
, &crc32
);
1557 if (debuglink
== NULL
)
1559 /* There's no separate debug info, hence there's no way we could
1560 load it => no warning. */
1564 cleanups
= make_cleanup (xfree
, debuglink
);
1565 dir
= xstrdup (objfile_name (objfile
));
1566 make_cleanup (xfree
, dir
);
1567 terminate_after_last_dir_separator (dir
);
1568 canon_dir
= lrealpath (dir
);
1570 debugfile
= find_separate_debug_file (dir
, canon_dir
, debuglink
,
1574 if (debugfile
== NULL
)
1576 /* For PR gdb/9538, try again with realpath (if different from the
1581 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1582 && S_ISLNK (st_buf
.st_mode
))
1586 symlink_dir
= lrealpath (objfile_name (objfile
));
1587 if (symlink_dir
!= NULL
)
1589 make_cleanup (xfree
, symlink_dir
);
1590 terminate_after_last_dir_separator (symlink_dir
);
1591 if (strcmp (dir
, symlink_dir
) != 0)
1593 /* Different directory, so try using it. */
1594 debugfile
= find_separate_debug_file (symlink_dir
,
1604 do_cleanups (cleanups
);
1608 /* This is the symbol-file command. Read the file, analyze its
1609 symbols, and add a struct symtab to a symtab list. The syntax of
1610 the command is rather bizarre:
1612 1. The function buildargv implements various quoting conventions
1613 which are undocumented and have little or nothing in common with
1614 the way things are quoted (or not quoted) elsewhere in GDB.
1616 2. Options are used, which are not generally used in GDB (perhaps
1617 "set mapped on", "set readnow on" would be better)
1619 3. The order of options matters, which is contrary to GNU
1620 conventions (because it is confusing and inconvenient). */
1623 symbol_file_command (const char *args
, int from_tty
)
1629 symbol_file_clear (from_tty
);
1633 objfile_flags flags
= OBJF_USERLOADED
;
1634 symfile_add_flags add_flags
= 0;
1638 add_flags
|= SYMFILE_VERBOSE
;
1640 gdb_argv
built_argv (args
);
1641 for (char *arg
: built_argv
)
1643 if (strcmp (arg
, "-readnow") == 0)
1644 flags
|= OBJF_READNOW
;
1645 else if (*arg
== '-')
1646 error (_("unknown option `%s'"), arg
);
1649 symbol_file_add_main_1 (arg
, add_flags
, flags
);
1655 error (_("no symbol file name was specified"));
1659 /* Set the initial language.
1661 FIXME: A better solution would be to record the language in the
1662 psymtab when reading partial symbols, and then use it (if known) to
1663 set the language. This would be a win for formats that encode the
1664 language in an easily discoverable place, such as DWARF. For
1665 stabs, we can jump through hoops looking for specially named
1666 symbols or try to intuit the language from the specific type of
1667 stabs we find, but we can't do that until later when we read in
1671 set_initial_language (void)
1673 enum language lang
= main_language ();
1675 if (lang
== language_unknown
)
1677 char *name
= main_name ();
1678 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1681 lang
= SYMBOL_LANGUAGE (sym
);
1684 if (lang
== language_unknown
)
1686 /* Make C the default language */
1690 set_language (lang
);
1691 expected_language
= current_language
; /* Don't warn the user. */
1694 /* Open the file specified by NAME and hand it off to BFD for
1695 preliminary analysis. Return a newly initialized bfd *, which
1696 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1697 absolute). In case of trouble, error() is called. */
1700 symfile_bfd_open (const char *name
)
1703 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
1705 if (!is_target_filename (name
))
1707 char *absolute_name
;
1709 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1711 /* Look down path for it, allocate 2nd new malloc'd copy. */
1712 desc
= openp (getenv ("PATH"),
1713 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1714 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1715 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1718 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1720 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1721 desc
= openp (getenv ("PATH"),
1722 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1723 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1727 perror_with_name (expanded_name
.get ());
1729 make_cleanup (xfree
, absolute_name
);
1730 name
= absolute_name
;
1733 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1734 if (sym_bfd
== NULL
)
1735 error (_("`%s': can't open to read symbols: %s."), name
,
1736 bfd_errmsg (bfd_get_error ()));
1738 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1739 bfd_set_cacheable (sym_bfd
.get (), 1);
1741 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1742 error (_("`%s': can't read symbols: %s."), name
,
1743 bfd_errmsg (bfd_get_error ()));
1745 do_cleanups (back_to
);
1750 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1751 the section was not found. */
1754 get_section_index (struct objfile
*objfile
, const char *section_name
)
1756 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1764 /* Link SF into the global symtab_fns list.
1765 FLAVOUR is the file format that SF handles.
1766 Called on startup by the _initialize routine in each object file format
1767 reader, to register information about each format the reader is prepared
1771 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1773 symtab_fns
.emplace_back (flavour
, sf
);
1776 /* Initialize OBJFILE to read symbols from its associated BFD. It
1777 either returns or calls error(). The result is an initialized
1778 struct sym_fns in the objfile structure, that contains cached
1779 information about the symbol file. */
1781 static const struct sym_fns
*
1782 find_sym_fns (bfd
*abfd
)
1784 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1786 if (our_flavour
== bfd_target_srec_flavour
1787 || our_flavour
== bfd_target_ihex_flavour
1788 || our_flavour
== bfd_target_tekhex_flavour
)
1789 return NULL
; /* No symbols. */
1791 for (const registered_sym_fns
&rsf
: symtab_fns
)
1792 if (our_flavour
== rsf
.sym_flavour
)
1795 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1796 bfd_get_target (abfd
));
1800 /* This function runs the load command of our current target. */
1803 load_command (char *arg
, int from_tty
)
1805 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1809 /* The user might be reloading because the binary has changed. Take
1810 this opportunity to check. */
1811 reopen_exec_file ();
1819 parg
= arg
= get_exec_file (1);
1821 /* Count how many \ " ' tab space there are in the name. */
1822 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1830 /* We need to quote this string so buildargv can pull it apart. */
1831 char *temp
= (char *) xmalloc (strlen (arg
) + count
+ 1 );
1835 make_cleanup (xfree
, temp
);
1838 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1840 strncpy (ptemp
, prev
, parg
- prev
);
1841 ptemp
+= parg
- prev
;
1845 strcpy (ptemp
, prev
);
1851 target_load (arg
, from_tty
);
1853 /* After re-loading the executable, we don't really know which
1854 overlays are mapped any more. */
1855 overlay_cache_invalid
= 1;
1857 do_cleanups (cleanup
);
1860 /* This version of "load" should be usable for any target. Currently
1861 it is just used for remote targets, not inftarg.c or core files,
1862 on the theory that only in that case is it useful.
1864 Avoiding xmodem and the like seems like a win (a) because we don't have
1865 to worry about finding it, and (b) On VMS, fork() is very slow and so
1866 we don't want to run a subprocess. On the other hand, I'm not sure how
1867 performance compares. */
1869 static int validate_download
= 0;
1871 /* Callback service function for generic_load (bfd_map_over_sections). */
1874 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1876 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1878 *sum
+= bfd_get_section_size (asec
);
1881 /* Opaque data for load_section_callback. */
1882 struct load_section_data
{
1883 CORE_ADDR load_offset
;
1884 struct load_progress_data
*progress_data
;
1885 VEC(memory_write_request_s
) *requests
;
1888 /* Opaque data for load_progress. */
1889 struct load_progress_data
{
1890 /* Cumulative data. */
1891 unsigned long write_count
;
1892 unsigned long data_count
;
1893 bfd_size_type total_size
;
1896 /* Opaque data for load_progress for a single section. */
1897 struct load_progress_section_data
{
1898 struct load_progress_data
*cumulative
;
1900 /* Per-section data. */
1901 const char *section_name
;
1902 ULONGEST section_sent
;
1903 ULONGEST section_size
;
1908 /* Target write callback routine for progress reporting. */
1911 load_progress (ULONGEST bytes
, void *untyped_arg
)
1913 struct load_progress_section_data
*args
1914 = (struct load_progress_section_data
*) untyped_arg
;
1915 struct load_progress_data
*totals
;
1918 /* Writing padding data. No easy way to get at the cumulative
1919 stats, so just ignore this. */
1922 totals
= args
->cumulative
;
1924 if (bytes
== 0 && args
->section_sent
== 0)
1926 /* The write is just starting. Let the user know we've started
1928 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1930 hex_string (args
->section_size
),
1931 paddress (target_gdbarch (), args
->lma
));
1935 if (validate_download
)
1937 /* Broken memories and broken monitors manifest themselves here
1938 when bring new computers to life. This doubles already slow
1940 /* NOTE: cagney/1999-10-18: A more efficient implementation
1941 might add a verify_memory() method to the target vector and
1942 then use that. remote.c could implement that method using
1943 the ``qCRC'' packet. */
1944 gdb::byte_vector
check (bytes
);
1946 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1947 error (_("Download verify read failed at %s"),
1948 paddress (target_gdbarch (), args
->lma
));
1949 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1950 error (_("Download verify compare failed at %s"),
1951 paddress (target_gdbarch (), args
->lma
));
1953 totals
->data_count
+= bytes
;
1955 args
->buffer
+= bytes
;
1956 totals
->write_count
+= 1;
1957 args
->section_sent
+= bytes
;
1958 if (check_quit_flag ()
1959 || (deprecated_ui_load_progress_hook
!= NULL
1960 && deprecated_ui_load_progress_hook (args
->section_name
,
1961 args
->section_sent
)))
1962 error (_("Canceled the download"));
1964 if (deprecated_show_load_progress
!= NULL
)
1965 deprecated_show_load_progress (args
->section_name
,
1969 totals
->total_size
);
1972 /* Callback service function for generic_load (bfd_map_over_sections). */
1975 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1977 struct memory_write_request
*new_request
;
1978 struct load_section_data
*args
= (struct load_section_data
*) data
;
1979 struct load_progress_section_data
*section_data
;
1980 bfd_size_type size
= bfd_get_section_size (asec
);
1982 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1984 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1990 new_request
= VEC_safe_push (memory_write_request_s
,
1991 args
->requests
, NULL
);
1992 memset (new_request
, 0, sizeof (struct memory_write_request
));
1993 section_data
= XCNEW (struct load_progress_section_data
);
1994 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1995 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
1997 new_request
->data
= (gdb_byte
*) xmalloc (size
);
1998 new_request
->baton
= section_data
;
2000 buffer
= new_request
->data
;
2002 section_data
->cumulative
= args
->progress_data
;
2003 section_data
->section_name
= sect_name
;
2004 section_data
->section_size
= size
;
2005 section_data
->lma
= new_request
->begin
;
2006 section_data
->buffer
= buffer
;
2008 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2011 /* Clean up an entire memory request vector, including load
2012 data and progress records. */
2015 clear_memory_write_data (void *arg
)
2017 VEC(memory_write_request_s
) **vec_p
= (VEC(memory_write_request_s
) **) arg
;
2018 VEC(memory_write_request_s
) *vec
= *vec_p
;
2020 struct memory_write_request
*mr
;
2022 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2027 VEC_free (memory_write_request_s
, vec
);
2030 static void print_transfer_performance (struct ui_file
*stream
,
2031 unsigned long data_count
,
2032 unsigned long write_count
,
2033 std::chrono::steady_clock::duration d
);
2036 generic_load (const char *args
, int from_tty
)
2038 struct cleanup
*old_cleanups
;
2039 struct load_section_data cbdata
;
2040 struct load_progress_data total_progress
;
2041 struct ui_out
*uiout
= current_uiout
;
2045 memset (&cbdata
, 0, sizeof (cbdata
));
2046 memset (&total_progress
, 0, sizeof (total_progress
));
2047 cbdata
.progress_data
= &total_progress
;
2049 old_cleanups
= make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2052 error_no_arg (_("file to load"));
2054 gdb_argv
argv (args
);
2056 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2058 if (argv
[1] != NULL
)
2062 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2064 /* If the last word was not a valid number then
2065 treat it as a file name with spaces in. */
2066 if (argv
[1] == endptr
)
2067 error (_("Invalid download offset:%s."), argv
[1]);
2069 if (argv
[2] != NULL
)
2070 error (_("Too many parameters."));
2073 /* Open the file for loading. */
2074 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
2075 if (loadfile_bfd
== NULL
)
2076 perror_with_name (filename
.get ());
2078 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2080 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2081 bfd_errmsg (bfd_get_error ()));
2084 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
2085 (void *) &total_progress
.total_size
);
2087 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
2089 using namespace std::chrono
;
2091 steady_clock::time_point start_time
= steady_clock::now ();
2093 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2094 load_progress
) != 0)
2095 error (_("Load failed"));
2097 steady_clock::time_point end_time
= steady_clock::now ();
2099 entry
= bfd_get_start_address (loadfile_bfd
.get ());
2100 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2101 uiout
->text ("Start address ");
2102 uiout
->field_fmt ("address", "%s", paddress (target_gdbarch (), entry
));
2103 uiout
->text (", load size ");
2104 uiout
->field_fmt ("load-size", "%lu", total_progress
.data_count
);
2106 regcache_write_pc (get_current_regcache (), entry
);
2108 /* Reset breakpoints, now that we have changed the load image. For
2109 instance, breakpoints may have been set (or reset, by
2110 post_create_inferior) while connected to the target but before we
2111 loaded the program. In that case, the prologue analyzer could
2112 have read instructions from the target to find the right
2113 breakpoint locations. Loading has changed the contents of that
2116 breakpoint_re_set ();
2118 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2119 total_progress
.write_count
,
2120 end_time
- start_time
);
2122 do_cleanups (old_cleanups
);
2125 /* Report on STREAM the performance of a memory transfer operation,
2126 such as 'load'. DATA_COUNT is the number of bytes transferred.
2127 WRITE_COUNT is the number of separate write operations, or 0, if
2128 that information is not available. TIME is how long the operation
2132 print_transfer_performance (struct ui_file
*stream
,
2133 unsigned long data_count
,
2134 unsigned long write_count
,
2135 std::chrono::steady_clock::duration time
)
2137 using namespace std::chrono
;
2138 struct ui_out
*uiout
= current_uiout
;
2140 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2142 uiout
->text ("Transfer rate: ");
2143 if (ms
.count () > 0)
2145 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2147 if (uiout
->is_mi_like_p ())
2149 uiout
->field_fmt ("transfer-rate", "%lu", rate
* 8);
2150 uiout
->text (" bits/sec");
2152 else if (rate
< 1024)
2154 uiout
->field_fmt ("transfer-rate", "%lu", rate
);
2155 uiout
->text (" bytes/sec");
2159 uiout
->field_fmt ("transfer-rate", "%lu", rate
/ 1024);
2160 uiout
->text (" KB/sec");
2165 uiout
->field_fmt ("transferred-bits", "%lu", (data_count
* 8));
2166 uiout
->text (" bits in <1 sec");
2168 if (write_count
> 0)
2171 uiout
->field_fmt ("write-rate", "%lu", data_count
/ write_count
);
2172 uiout
->text (" bytes/write");
2174 uiout
->text (".\n");
2177 /* This function allows the addition of incrementally linked object files.
2178 It does not modify any state in the target, only in the debugger. */
2179 /* Note: ezannoni 2000-04-13 This function/command used to have a
2180 special case syntax for the rombug target (Rombug is the boot
2181 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2182 rombug case, the user doesn't need to supply a text address,
2183 instead a call to target_link() (in target.c) would supply the
2184 value to use. We are now discontinuing this type of ad hoc syntax. */
2187 add_symbol_file_command (const char *args
, int from_tty
)
2189 struct gdbarch
*gdbarch
= get_current_arch ();
2190 gdb::unique_xmalloc_ptr
<char> filename
;
2194 int expecting_sec_name
= 0;
2195 int expecting_sec_addr
= 0;
2196 struct objfile
*objf
;
2197 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2198 symfile_add_flags add_flags
= 0;
2201 add_flags
|= SYMFILE_VERBOSE
;
2209 struct section_addr_info
*section_addrs
;
2210 std::vector
<sect_opt
> sect_opts
;
2211 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2216 error (_("add-symbol-file takes a file name and an address"));
2218 gdb_argv
argv (args
);
2220 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2222 /* Process the argument. */
2225 /* The first argument is the file name. */
2226 filename
.reset (tilde_expand (arg
));
2228 else if (argcnt
== 1)
2230 /* The second argument is always the text address at which
2231 to load the program. */
2232 sect_opt sect
= { ".text", arg
};
2233 sect_opts
.push_back (sect
);
2237 /* It's an option (starting with '-') or it's an argument
2239 if (expecting_sec_name
)
2241 sect_opt sect
= { arg
, NULL
};
2242 sect_opts
.push_back (sect
);
2243 expecting_sec_name
= 0;
2245 else if (expecting_sec_addr
)
2247 sect_opts
.back ().value
= arg
;
2248 expecting_sec_addr
= 0;
2250 else if (strcmp (arg
, "-readnow") == 0)
2251 flags
|= OBJF_READNOW
;
2252 else if (strcmp (arg
, "-s") == 0)
2254 expecting_sec_name
= 1;
2255 expecting_sec_addr
= 1;
2258 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2259 " [-readnow] [-s <secname> <addr>]*"));
2263 /* This command takes at least two arguments. The first one is a
2264 filename, and the second is the address where this file has been
2265 loaded. Abort now if this address hasn't been provided by the
2267 if (sect_opts
.empty ())
2268 error (_("The address where %s has been loaded is missing"),
2271 /* Print the prompt for the query below. And save the arguments into
2272 a sect_addr_info structure to be passed around to other
2273 functions. We have to split this up into separate print
2274 statements because hex_string returns a local static
2277 printf_unfiltered (_("add symbol table from file \"%s\" at\n"),
2279 section_addrs
= alloc_section_addr_info (sect_opts
.size ());
2280 make_cleanup (xfree
, section_addrs
);
2281 for (sect_opt
§
: sect_opts
)
2284 const char *val
= sect
.value
;
2285 const char *sec
= sect
.name
;
2287 addr
= parse_and_eval_address (val
);
2289 /* Here we store the section offsets in the order they were
2290 entered on the command line. */
2291 section_addrs
->other
[sec_num
].name
= (char *) sec
;
2292 section_addrs
->other
[sec_num
].addr
= addr
;
2293 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2294 paddress (gdbarch
, addr
));
2297 /* The object's sections are initialized when a
2298 call is made to build_objfile_section_table (objfile).
2299 This happens in reread_symbols.
2300 At this point, we don't know what file type this is,
2301 so we can't determine what section names are valid. */
2303 section_addrs
->num_sections
= sec_num
;
2305 if (from_tty
&& (!query ("%s", "")))
2306 error (_("Not confirmed."));
2308 objf
= symbol_file_add (filename
.get (), add_flags
, section_addrs
, flags
);
2310 add_target_sections_of_objfile (objf
);
2312 /* Getting new symbols may change our opinion about what is
2314 reinit_frame_cache ();
2315 do_cleanups (my_cleanups
);
2319 /* This function removes a symbol file that was added via add-symbol-file. */
2322 remove_symbol_file_command (const char *args
, int from_tty
)
2324 struct objfile
*objf
= NULL
;
2325 struct program_space
*pspace
= current_program_space
;
2330 error (_("remove-symbol-file: no symbol file provided"));
2332 gdb_argv
argv (args
);
2334 if (strcmp (argv
[0], "-a") == 0)
2336 /* Interpret the next argument as an address. */
2339 if (argv
[1] == NULL
)
2340 error (_("Missing address argument"));
2342 if (argv
[2] != NULL
)
2343 error (_("Junk after %s"), argv
[1]);
2345 addr
= parse_and_eval_address (argv
[1]);
2349 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2350 && (objf
->flags
& OBJF_SHARED
) != 0
2351 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2355 else if (argv
[0] != NULL
)
2357 /* Interpret the current argument as a file name. */
2359 if (argv
[1] != NULL
)
2360 error (_("Junk after %s"), argv
[0]);
2362 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2366 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2367 && (objf
->flags
& OBJF_SHARED
) != 0
2368 && objf
->pspace
== pspace
2369 && filename_cmp (filename
.get (), objfile_name (objf
)) == 0)
2375 error (_("No symbol file found"));
2378 && !query (_("Remove symbol table from file \"%s\"? "),
2379 objfile_name (objf
)))
2380 error (_("Not confirmed."));
2382 free_objfile (objf
);
2383 clear_symtab_users (0);
2386 /* Re-read symbols if a symbol-file has changed. */
2389 reread_symbols (void)
2391 struct objfile
*objfile
;
2393 struct stat new_statbuf
;
2395 std::vector
<struct objfile
*> new_objfiles
;
2397 /* With the addition of shared libraries, this should be modified,
2398 the load time should be saved in the partial symbol tables, since
2399 different tables may come from different source files. FIXME.
2400 This routine should then walk down each partial symbol table
2401 and see if the symbol table that it originates from has been changed. */
2403 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2405 if (objfile
->obfd
== NULL
)
2408 /* Separate debug objfiles are handled in the main objfile. */
2409 if (objfile
->separate_debug_objfile_backlink
)
2412 /* If this object is from an archive (what you usually create with
2413 `ar', often called a `static library' on most systems, though
2414 a `shared library' on AIX is also an archive), then you should
2415 stat on the archive name, not member name. */
2416 if (objfile
->obfd
->my_archive
)
2417 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2419 res
= stat (objfile_name (objfile
), &new_statbuf
);
2422 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2423 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2424 objfile_name (objfile
));
2427 new_modtime
= new_statbuf
.st_mtime
;
2428 if (new_modtime
!= objfile
->mtime
)
2430 struct cleanup
*old_cleanups
;
2431 struct section_offsets
*offsets
;
2433 char *original_name
;
2435 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2436 objfile_name (objfile
));
2438 /* There are various functions like symbol_file_add,
2439 symfile_bfd_open, syms_from_objfile, etc., which might
2440 appear to do what we want. But they have various other
2441 effects which we *don't* want. So we just do stuff
2442 ourselves. We don't worry about mapped files (for one thing,
2443 any mapped file will be out of date). */
2445 /* If we get an error, blow away this objfile (not sure if
2446 that is the correct response for things like shared
2448 old_cleanups
= make_cleanup_free_objfile (objfile
);
2449 /* We need to do this whenever any symbols go away. */
2450 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2452 if (exec_bfd
!= NULL
2453 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2454 bfd_get_filename (exec_bfd
)) == 0)
2456 /* Reload EXEC_BFD without asking anything. */
2458 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2461 /* Keep the calls order approx. the same as in free_objfile. */
2463 /* Free the separate debug objfiles. It will be
2464 automatically recreated by sym_read. */
2465 free_objfile_separate_debug (objfile
);
2467 /* Remove any references to this objfile in the global
2469 preserve_values (objfile
);
2471 /* Nuke all the state that we will re-read. Much of the following
2472 code which sets things to NULL really is necessary to tell
2473 other parts of GDB that there is nothing currently there.
2475 Try to keep the freeing order compatible with free_objfile. */
2477 if (objfile
->sf
!= NULL
)
2479 (*objfile
->sf
->sym_finish
) (objfile
);
2482 clear_objfile_data (objfile
);
2484 /* Clean up any state BFD has sitting around. */
2486 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2487 char *obfd_filename
;
2489 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2490 /* Open the new BFD before freeing the old one, so that
2491 the filename remains live. */
2492 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2493 objfile
->obfd
= temp
.release ();
2494 if (objfile
->obfd
== NULL
)
2495 error (_("Can't open %s to read symbols."), obfd_filename
);
2498 original_name
= xstrdup (objfile
->original_name
);
2499 make_cleanup (xfree
, original_name
);
2501 /* bfd_openr sets cacheable to true, which is what we want. */
2502 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2503 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2504 bfd_errmsg (bfd_get_error ()));
2506 /* Save the offsets, we will nuke them with the rest of the
2508 num_offsets
= objfile
->num_sections
;
2509 offsets
= ((struct section_offsets
*)
2510 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2511 memcpy (offsets
, objfile
->section_offsets
,
2512 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2514 /* FIXME: Do we have to free a whole linked list, or is this
2516 if (objfile
->global_psymbols
.list
)
2517 xfree (objfile
->global_psymbols
.list
);
2518 memset (&objfile
->global_psymbols
, 0,
2519 sizeof (objfile
->global_psymbols
));
2520 if (objfile
->static_psymbols
.list
)
2521 xfree (objfile
->static_psymbols
.list
);
2522 memset (&objfile
->static_psymbols
, 0,
2523 sizeof (objfile
->static_psymbols
));
2525 /* Free the obstacks for non-reusable objfiles. */
2526 psymbol_bcache_free (objfile
->psymbol_cache
);
2527 objfile
->psymbol_cache
= psymbol_bcache_init ();
2529 /* NB: after this call to obstack_free, objfiles_changed
2530 will need to be called (see discussion below). */
2531 obstack_free (&objfile
->objfile_obstack
, 0);
2532 objfile
->sections
= NULL
;
2533 objfile
->compunit_symtabs
= NULL
;
2534 objfile
->psymtabs
= NULL
;
2535 objfile
->psymtabs_addrmap
= NULL
;
2536 objfile
->free_psymtabs
= NULL
;
2537 objfile
->template_symbols
= NULL
;
2539 /* obstack_init also initializes the obstack so it is
2540 empty. We could use obstack_specify_allocation but
2541 gdb_obstack.h specifies the alloc/dealloc functions. */
2542 obstack_init (&objfile
->objfile_obstack
);
2544 /* set_objfile_per_bfd potentially allocates the per-bfd
2545 data on the objfile's obstack (if sharing data across
2546 multiple users is not possible), so it's important to
2547 do it *after* the obstack has been initialized. */
2548 set_objfile_per_bfd (objfile
);
2550 objfile
->original_name
2551 = (char *) obstack_copy0 (&objfile
->objfile_obstack
, original_name
,
2552 strlen (original_name
));
2554 /* Reset the sym_fns pointer. The ELF reader can change it
2555 based on whether .gdb_index is present, and we need it to
2556 start over. PR symtab/15885 */
2557 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2559 build_objfile_section_table (objfile
);
2560 terminate_minimal_symbol_table (objfile
);
2562 /* We use the same section offsets as from last time. I'm not
2563 sure whether that is always correct for shared libraries. */
2564 objfile
->section_offsets
= (struct section_offsets
*)
2565 obstack_alloc (&objfile
->objfile_obstack
,
2566 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2567 memcpy (objfile
->section_offsets
, offsets
,
2568 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2569 objfile
->num_sections
= num_offsets
;
2571 /* What the hell is sym_new_init for, anyway? The concept of
2572 distinguishing between the main file and additional files
2573 in this way seems rather dubious. */
2574 if (objfile
== symfile_objfile
)
2576 (*objfile
->sf
->sym_new_init
) (objfile
);
2579 (*objfile
->sf
->sym_init
) (objfile
);
2580 clear_complaints (&symfile_complaints
, 1, 1);
2582 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2584 /* We are about to read new symbols and potentially also
2585 DWARF information. Some targets may want to pass addresses
2586 read from DWARF DIE's through an adjustment function before
2587 saving them, like MIPS, which may call into
2588 "find_pc_section". When called, that function will make
2589 use of per-objfile program space data.
2591 Since we discarded our section information above, we have
2592 dangling pointers in the per-objfile program space data
2593 structure. Force GDB to update the section mapping
2594 information by letting it know the objfile has changed,
2595 making the dangling pointers point to correct data
2598 objfiles_changed ();
2600 read_symbols (objfile
, 0);
2602 if (!objfile_has_symbols (objfile
))
2605 printf_unfiltered (_("(no debugging symbols found)\n"));
2609 /* We're done reading the symbol file; finish off complaints. */
2610 clear_complaints (&symfile_complaints
, 0, 1);
2612 /* Getting new symbols may change our opinion about what is
2615 reinit_frame_cache ();
2617 /* Discard cleanups as symbol reading was successful. */
2618 discard_cleanups (old_cleanups
);
2620 /* If the mtime has changed between the time we set new_modtime
2621 and now, we *want* this to be out of date, so don't call stat
2623 objfile
->mtime
= new_modtime
;
2624 init_entry_point_info (objfile
);
2626 new_objfiles
.push_back (objfile
);
2630 if (!new_objfiles
.empty ())
2632 clear_symtab_users (0);
2634 /* clear_objfile_data for each objfile was called before freeing it and
2635 observer_notify_new_objfile (NULL) has been called by
2636 clear_symtab_users above. Notify the new files now. */
2637 for (auto iter
: new_objfiles
)
2638 observer_notify_new_objfile (iter
);
2640 /* At least one objfile has changed, so we can consider that
2641 the executable we're debugging has changed too. */
2642 observer_notify_executable_changed ();
2651 } filename_language
;
2653 DEF_VEC_O (filename_language
);
2655 static VEC (filename_language
) *filename_language_table
;
2657 /* See symfile.h. */
2660 add_filename_language (const char *ext
, enum language lang
)
2662 filename_language entry
;
2664 entry
.ext
= xstrdup (ext
);
2667 VEC_safe_push (filename_language
, filename_language_table
, &entry
);
2670 static char *ext_args
;
2672 show_ext_args (struct ui_file
*file
, int from_tty
,
2673 struct cmd_list_element
*c
, const char *value
)
2675 fprintf_filtered (file
,
2676 _("Mapping between filename extension "
2677 "and source language is \"%s\".\n"),
2682 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2685 char *cp
= ext_args
;
2687 filename_language
*entry
;
2689 /* First arg is filename extension, starting with '.' */
2691 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2693 /* Find end of first arg. */
2694 while (*cp
&& !isspace (*cp
))
2698 error (_("'%s': two arguments required -- "
2699 "filename extension and language"),
2702 /* Null-terminate first arg. */
2705 /* Find beginning of second arg, which should be a source language. */
2706 cp
= skip_spaces (cp
);
2709 error (_("'%s': two arguments required -- "
2710 "filename extension and language"),
2713 /* Lookup the language from among those we know. */
2714 lang
= language_enum (cp
);
2716 /* Now lookup the filename extension: do we already know it? */
2718 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2721 if (0 == strcmp (ext_args
, entry
->ext
))
2727 /* New file extension. */
2728 add_filename_language (ext_args
, lang
);
2732 /* Redefining a previously known filename extension. */
2735 /* query ("Really make files of type %s '%s'?", */
2736 /* ext_args, language_str (lang)); */
2739 entry
->ext
= xstrdup (ext_args
);
2745 info_ext_lang_command (char *args
, int from_tty
)
2748 filename_language
*entry
;
2750 printf_filtered (_("Filename extensions and the languages they represent:"));
2751 printf_filtered ("\n\n");
2753 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2755 printf_filtered ("\t%s\t- %s\n", entry
->ext
, language_str (entry
->lang
));
2759 deduce_language_from_filename (const char *filename
)
2764 if (filename
!= NULL
)
2765 if ((cp
= strrchr (filename
, '.')) != NULL
)
2767 filename_language
*entry
;
2770 VEC_iterate (filename_language
, filename_language_table
, i
, entry
);
2772 if (strcmp (cp
, entry
->ext
) == 0)
2776 return language_unknown
;
2779 /* Allocate and initialize a new symbol table.
2780 CUST is from the result of allocate_compunit_symtab. */
2783 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2785 struct objfile
*objfile
= cust
->objfile
;
2786 struct symtab
*symtab
2787 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2790 = (const char *) bcache (filename
, strlen (filename
) + 1,
2791 objfile
->per_bfd
->filename_cache
);
2792 symtab
->fullname
= NULL
;
2793 symtab
->language
= deduce_language_from_filename (filename
);
2795 /* This can be very verbose with lots of headers.
2796 Only print at higher debug levels. */
2797 if (symtab_create_debug
>= 2)
2799 /* Be a bit clever with debugging messages, and don't print objfile
2800 every time, only when it changes. */
2801 static char *last_objfile_name
= NULL
;
2803 if (last_objfile_name
== NULL
2804 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2806 xfree (last_objfile_name
);
2807 last_objfile_name
= xstrdup (objfile_name (objfile
));
2808 fprintf_unfiltered (gdb_stdlog
,
2809 "Creating one or more symtabs for objfile %s ...\n",
2812 fprintf_unfiltered (gdb_stdlog
,
2813 "Created symtab %s for module %s.\n",
2814 host_address_to_string (symtab
), filename
);
2817 /* Add it to CUST's list of symtabs. */
2818 if (cust
->filetabs
== NULL
)
2820 cust
->filetabs
= symtab
;
2821 cust
->last_filetab
= symtab
;
2825 cust
->last_filetab
->next
= symtab
;
2826 cust
->last_filetab
= symtab
;
2829 /* Backlink to the containing compunit symtab. */
2830 symtab
->compunit_symtab
= cust
;
2835 /* Allocate and initialize a new compunit.
2836 NAME is the name of the main source file, if there is one, or some
2837 descriptive text if there are no source files. */
2839 struct compunit_symtab
*
2840 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2842 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2843 struct compunit_symtab
);
2844 const char *saved_name
;
2846 cu
->objfile
= objfile
;
2848 /* The name we record here is only for display/debugging purposes.
2849 Just save the basename to avoid path issues (too long for display,
2850 relative vs absolute, etc.). */
2851 saved_name
= lbasename (name
);
2853 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2854 strlen (saved_name
));
2856 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2858 if (symtab_create_debug
)
2860 fprintf_unfiltered (gdb_stdlog
,
2861 "Created compunit symtab %s for %s.\n",
2862 host_address_to_string (cu
),
2869 /* Hook CU to the objfile it comes from. */
2872 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2874 cu
->next
= cu
->objfile
->compunit_symtabs
;
2875 cu
->objfile
->compunit_symtabs
= cu
;
2879 /* Reset all data structures in gdb which may contain references to
2880 symbol table data. */
2883 clear_symtab_users (symfile_add_flags add_flags
)
2885 /* Someday, we should do better than this, by only blowing away
2886 the things that really need to be blown. */
2888 /* Clear the "current" symtab first, because it is no longer valid.
2889 breakpoint_re_set may try to access the current symtab. */
2890 clear_current_source_symtab_and_line ();
2893 clear_last_displayed_sal ();
2894 clear_pc_function_cache ();
2895 observer_notify_new_objfile (NULL
);
2897 /* Clear globals which might have pointed into a removed objfile.
2898 FIXME: It's not clear which of these are supposed to persist
2899 between expressions and which ought to be reset each time. */
2900 expression_context_block
= NULL
;
2901 innermost_block
= NULL
;
2903 /* Varobj may refer to old symbols, perform a cleanup. */
2904 varobj_invalidate ();
2906 /* Now that the various caches have been cleared, we can re_set
2907 our breakpoints without risking it using stale data. */
2908 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2909 breakpoint_re_set ();
2913 clear_symtab_users_cleanup (void *ignore
)
2915 clear_symtab_users (0);
2919 The following code implements an abstraction for debugging overlay sections.
2921 The target model is as follows:
2922 1) The gnu linker will permit multiple sections to be mapped into the
2923 same VMA, each with its own unique LMA (or load address).
2924 2) It is assumed that some runtime mechanism exists for mapping the
2925 sections, one by one, from the load address into the VMA address.
2926 3) This code provides a mechanism for gdb to keep track of which
2927 sections should be considered to be mapped from the VMA to the LMA.
2928 This information is used for symbol lookup, and memory read/write.
2929 For instance, if a section has been mapped then its contents
2930 should be read from the VMA, otherwise from the LMA.
2932 Two levels of debugger support for overlays are available. One is
2933 "manual", in which the debugger relies on the user to tell it which
2934 overlays are currently mapped. This level of support is
2935 implemented entirely in the core debugger, and the information about
2936 whether a section is mapped is kept in the objfile->obj_section table.
2938 The second level of support is "automatic", and is only available if
2939 the target-specific code provides functionality to read the target's
2940 overlay mapping table, and translate its contents for the debugger
2941 (by updating the mapped state information in the obj_section tables).
2943 The interface is as follows:
2945 overlay map <name> -- tell gdb to consider this section mapped
2946 overlay unmap <name> -- tell gdb to consider this section unmapped
2947 overlay list -- list the sections that GDB thinks are mapped
2948 overlay read-target -- get the target's state of what's mapped
2949 overlay off/manual/auto -- set overlay debugging state
2950 Functional interface:
2951 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2952 section, return that section.
2953 find_pc_overlay(pc): find any overlay section that contains
2954 the pc, either in its VMA or its LMA
2955 section_is_mapped(sect): true if overlay is marked as mapped
2956 section_is_overlay(sect): true if section's VMA != LMA
2957 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2958 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2959 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2960 overlay_mapped_address(...): map an address from section's LMA to VMA
2961 overlay_unmapped_address(...): map an address from section's VMA to LMA
2962 symbol_overlayed_address(...): Return a "current" address for symbol:
2963 either in VMA or LMA depending on whether
2964 the symbol's section is currently mapped. */
2966 /* Overlay debugging state: */
2968 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2969 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2971 /* Function: section_is_overlay (SECTION)
2972 Returns true if SECTION has VMA not equal to LMA, ie.
2973 SECTION is loaded at an address different from where it will "run". */
2976 section_is_overlay (struct obj_section
*section
)
2978 if (overlay_debugging
&& section
)
2980 bfd
*abfd
= section
->objfile
->obfd
;
2981 asection
*bfd_section
= section
->the_bfd_section
;
2983 if (bfd_section_lma (abfd
, bfd_section
) != 0
2984 && bfd_section_lma (abfd
, bfd_section
)
2985 != bfd_section_vma (abfd
, bfd_section
))
2992 /* Function: overlay_invalidate_all (void)
2993 Invalidate the mapped state of all overlay sections (mark it as stale). */
2996 overlay_invalidate_all (void)
2998 struct objfile
*objfile
;
2999 struct obj_section
*sect
;
3001 ALL_OBJSECTIONS (objfile
, sect
)
3002 if (section_is_overlay (sect
))
3003 sect
->ovly_mapped
= -1;
3006 /* Function: section_is_mapped (SECTION)
3007 Returns true if section is an overlay, and is currently mapped.
3009 Access to the ovly_mapped flag is restricted to this function, so
3010 that we can do automatic update. If the global flag
3011 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3012 overlay_invalidate_all. If the mapped state of the particular
3013 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3016 section_is_mapped (struct obj_section
*osect
)
3018 struct gdbarch
*gdbarch
;
3020 if (osect
== 0 || !section_is_overlay (osect
))
3023 switch (overlay_debugging
)
3027 return 0; /* overlay debugging off */
3028 case ovly_auto
: /* overlay debugging automatic */
3029 /* Unles there is a gdbarch_overlay_update function,
3030 there's really nothing useful to do here (can't really go auto). */
3031 gdbarch
= get_objfile_arch (osect
->objfile
);
3032 if (gdbarch_overlay_update_p (gdbarch
))
3034 if (overlay_cache_invalid
)
3036 overlay_invalidate_all ();
3037 overlay_cache_invalid
= 0;
3039 if (osect
->ovly_mapped
== -1)
3040 gdbarch_overlay_update (gdbarch
, osect
);
3042 /* fall thru to manual case */
3043 case ovly_on
: /* overlay debugging manual */
3044 return osect
->ovly_mapped
== 1;
3048 /* Function: pc_in_unmapped_range
3049 If PC falls into the lma range of SECTION, return true, else false. */
3052 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3054 if (section_is_overlay (section
))
3056 bfd
*abfd
= section
->objfile
->obfd
;
3057 asection
*bfd_section
= section
->the_bfd_section
;
3059 /* We assume the LMA is relocated by the same offset as the VMA. */
3060 bfd_vma size
= bfd_get_section_size (bfd_section
);
3061 CORE_ADDR offset
= obj_section_offset (section
);
3063 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3064 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3071 /* Function: pc_in_mapped_range
3072 If PC falls into the vma range of SECTION, return true, else false. */
3075 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3077 if (section_is_overlay (section
))
3079 if (obj_section_addr (section
) <= pc
3080 && pc
< obj_section_endaddr (section
))
3087 /* Return true if the mapped ranges of sections A and B overlap, false
3091 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3093 CORE_ADDR a_start
= obj_section_addr (a
);
3094 CORE_ADDR a_end
= obj_section_endaddr (a
);
3095 CORE_ADDR b_start
= obj_section_addr (b
);
3096 CORE_ADDR b_end
= obj_section_endaddr (b
);
3098 return (a_start
< b_end
&& b_start
< a_end
);
3101 /* Function: overlay_unmapped_address (PC, SECTION)
3102 Returns the address corresponding to PC in the unmapped (load) range.
3103 May be the same as PC. */
3106 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3108 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3110 bfd
*abfd
= section
->objfile
->obfd
;
3111 asection
*bfd_section
= section
->the_bfd_section
;
3113 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3114 - bfd_section_vma (abfd
, bfd_section
);
3120 /* Function: overlay_mapped_address (PC, SECTION)
3121 Returns the address corresponding to PC in the mapped (runtime) range.
3122 May be the same as PC. */
3125 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3127 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3129 bfd
*abfd
= section
->objfile
->obfd
;
3130 asection
*bfd_section
= section
->the_bfd_section
;
3132 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3133 - bfd_section_lma (abfd
, bfd_section
);
3139 /* Function: symbol_overlayed_address
3140 Return one of two addresses (relative to the VMA or to the LMA),
3141 depending on whether the section is mapped or not. */
3144 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3146 if (overlay_debugging
)
3148 /* If the symbol has no section, just return its regular address. */
3151 /* If the symbol's section is not an overlay, just return its
3153 if (!section_is_overlay (section
))
3155 /* If the symbol's section is mapped, just return its address. */
3156 if (section_is_mapped (section
))
3159 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3160 * then return its LOADED address rather than its vma address!!
3162 return overlay_unmapped_address (address
, section
);
3167 /* Function: find_pc_overlay (PC)
3168 Return the best-match overlay section for PC:
3169 If PC matches a mapped overlay section's VMA, return that section.
3170 Else if PC matches an unmapped section's VMA, return that section.
3171 Else if PC matches an unmapped section's LMA, return that section. */
3173 struct obj_section
*
3174 find_pc_overlay (CORE_ADDR pc
)
3176 struct objfile
*objfile
;
3177 struct obj_section
*osect
, *best_match
= NULL
;
3179 if (overlay_debugging
)
3181 ALL_OBJSECTIONS (objfile
, osect
)
3182 if (section_is_overlay (osect
))
3184 if (pc_in_mapped_range (pc
, osect
))
3186 if (section_is_mapped (osect
))
3191 else if (pc_in_unmapped_range (pc
, osect
))
3198 /* Function: find_pc_mapped_section (PC)
3199 If PC falls into the VMA address range of an overlay section that is
3200 currently marked as MAPPED, return that section. Else return NULL. */
3202 struct obj_section
*
3203 find_pc_mapped_section (CORE_ADDR pc
)
3205 struct objfile
*objfile
;
3206 struct obj_section
*osect
;
3208 if (overlay_debugging
)
3210 ALL_OBJSECTIONS (objfile
, osect
)
3211 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3218 /* Function: list_overlays_command
3219 Print a list of mapped sections and their PC ranges. */
3222 list_overlays_command (const char *args
, int from_tty
)
3225 struct objfile
*objfile
;
3226 struct obj_section
*osect
;
3228 if (overlay_debugging
)
3230 ALL_OBJSECTIONS (objfile
, osect
)
3231 if (section_is_mapped (osect
))
3233 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3238 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3239 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3240 size
= bfd_get_section_size (osect
->the_bfd_section
);
3241 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3243 printf_filtered ("Section %s, loaded at ", name
);
3244 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3245 puts_filtered (" - ");
3246 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3247 printf_filtered (", mapped at ");
3248 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3249 puts_filtered (" - ");
3250 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3251 puts_filtered ("\n");
3257 printf_filtered (_("No sections are mapped.\n"));
3260 /* Function: map_overlay_command
3261 Mark the named section as mapped (ie. residing at its VMA address). */
3264 map_overlay_command (const char *args
, int from_tty
)
3266 struct objfile
*objfile
, *objfile2
;
3267 struct obj_section
*sec
, *sec2
;
3269 if (!overlay_debugging
)
3270 error (_("Overlay debugging not enabled. Use "
3271 "either the 'overlay auto' or\n"
3272 "the 'overlay manual' command."));
3274 if (args
== 0 || *args
== 0)
3275 error (_("Argument required: name of an overlay section"));
3277 /* First, find a section matching the user supplied argument. */
3278 ALL_OBJSECTIONS (objfile
, sec
)
3279 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3281 /* Now, check to see if the section is an overlay. */
3282 if (!section_is_overlay (sec
))
3283 continue; /* not an overlay section */
3285 /* Mark the overlay as "mapped". */
3286 sec
->ovly_mapped
= 1;
3288 /* Next, make a pass and unmap any sections that are
3289 overlapped by this new section: */
3290 ALL_OBJSECTIONS (objfile2
, sec2
)
3291 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3294 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3295 bfd_section_name (objfile
->obfd
,
3296 sec2
->the_bfd_section
));
3297 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3301 error (_("No overlay section called %s"), args
);
3304 /* Function: unmap_overlay_command
3305 Mark the overlay section as unmapped
3306 (ie. resident in its LMA address range, rather than the VMA range). */
3309 unmap_overlay_command (const char *args
, int from_tty
)
3311 struct objfile
*objfile
;
3312 struct obj_section
*sec
= NULL
;
3314 if (!overlay_debugging
)
3315 error (_("Overlay debugging not enabled. "
3316 "Use either the 'overlay auto' or\n"
3317 "the 'overlay manual' command."));
3319 if (args
== 0 || *args
== 0)
3320 error (_("Argument required: name of an overlay section"));
3322 /* First, find a section matching the user supplied argument. */
3323 ALL_OBJSECTIONS (objfile
, sec
)
3324 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3326 if (!sec
->ovly_mapped
)
3327 error (_("Section %s is not mapped"), args
);
3328 sec
->ovly_mapped
= 0;
3331 error (_("No overlay section called %s"), args
);
3334 /* Function: overlay_auto_command
3335 A utility command to turn on overlay debugging.
3336 Possibly this should be done via a set/show command. */
3339 overlay_auto_command (const char *args
, int from_tty
)
3341 overlay_debugging
= ovly_auto
;
3342 enable_overlay_breakpoints ();
3344 printf_unfiltered (_("Automatic overlay debugging enabled."));
3347 /* Function: overlay_manual_command
3348 A utility command to turn on overlay debugging.
3349 Possibly this should be done via a set/show command. */
3352 overlay_manual_command (const char *args
, int from_tty
)
3354 overlay_debugging
= ovly_on
;
3355 disable_overlay_breakpoints ();
3357 printf_unfiltered (_("Overlay debugging enabled."));
3360 /* Function: overlay_off_command
3361 A utility command to turn on overlay debugging.
3362 Possibly this should be done via a set/show command. */
3365 overlay_off_command (const char *args
, int from_tty
)
3367 overlay_debugging
= ovly_off
;
3368 disable_overlay_breakpoints ();
3370 printf_unfiltered (_("Overlay debugging disabled."));
3374 overlay_load_command (const char *args
, int from_tty
)
3376 struct gdbarch
*gdbarch
= get_current_arch ();
3378 if (gdbarch_overlay_update_p (gdbarch
))
3379 gdbarch_overlay_update (gdbarch
, NULL
);
3381 error (_("This target does not know how to read its overlay state."));
3384 /* Function: overlay_command
3385 A place-holder for a mis-typed command. */
3387 /* Command list chain containing all defined "overlay" subcommands. */
3388 static struct cmd_list_element
*overlaylist
;
3391 overlay_command (char *args
, int from_tty
)
3394 ("\"overlay\" must be followed by the name of an overlay command.\n");
3395 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3398 /* Target Overlays for the "Simplest" overlay manager:
3400 This is GDB's default target overlay layer. It works with the
3401 minimal overlay manager supplied as an example by Cygnus. The
3402 entry point is via a function pointer "gdbarch_overlay_update",
3403 so targets that use a different runtime overlay manager can
3404 substitute their own overlay_update function and take over the
3407 The overlay_update function pokes around in the target's data structures
3408 to see what overlays are mapped, and updates GDB's overlay mapping with
3411 In this simple implementation, the target data structures are as follows:
3412 unsigned _novlys; /# number of overlay sections #/
3413 unsigned _ovly_table[_novlys][4] = {
3414 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3415 {..., ..., ..., ...},
3417 unsigned _novly_regions; /# number of overlay regions #/
3418 unsigned _ovly_region_table[_novly_regions][3] = {
3419 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3422 These functions will attempt to update GDB's mappedness state in the
3423 symbol section table, based on the target's mappedness state.
3425 To do this, we keep a cached copy of the target's _ovly_table, and
3426 attempt to detect when the cached copy is invalidated. The main
3427 entry point is "simple_overlay_update(SECT), which looks up SECT in
3428 the cached table and re-reads only the entry for that section from
3429 the target (whenever possible). */
3431 /* Cached, dynamically allocated copies of the target data structures: */
3432 static unsigned (*cache_ovly_table
)[4] = 0;
3433 static unsigned cache_novlys
= 0;
3434 static CORE_ADDR cache_ovly_table_base
= 0;
3437 VMA
, OSIZE
, LMA
, MAPPED
3440 /* Throw away the cached copy of _ovly_table. */
3443 simple_free_overlay_table (void)
3445 if (cache_ovly_table
)
3446 xfree (cache_ovly_table
);
3448 cache_ovly_table
= NULL
;
3449 cache_ovly_table_base
= 0;
3452 /* Read an array of ints of size SIZE from the target into a local buffer.
3453 Convert to host order. int LEN is number of ints. */
3456 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3457 int len
, int size
, enum bfd_endian byte_order
)
3459 /* FIXME (alloca): Not safe if array is very large. */
3460 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3463 read_memory (memaddr
, buf
, len
* size
);
3464 for (i
= 0; i
< len
; i
++)
3465 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3468 /* Find and grab a copy of the target _ovly_table
3469 (and _novlys, which is needed for the table's size). */
3472 simple_read_overlay_table (void)
3474 struct bound_minimal_symbol novlys_msym
;
3475 struct bound_minimal_symbol ovly_table_msym
;
3476 struct gdbarch
*gdbarch
;
3478 enum bfd_endian byte_order
;
3480 simple_free_overlay_table ();
3481 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3482 if (! novlys_msym
.minsym
)
3484 error (_("Error reading inferior's overlay table: "
3485 "couldn't find `_novlys' variable\n"
3486 "in inferior. Use `overlay manual' mode."));
3490 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3491 if (! ovly_table_msym
.minsym
)
3493 error (_("Error reading inferior's overlay table: couldn't find "
3494 "`_ovly_table' array\n"
3495 "in inferior. Use `overlay manual' mode."));
3499 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3500 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3501 byte_order
= gdbarch_byte_order (gdbarch
);
3503 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3506 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3507 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3508 read_target_long_array (cache_ovly_table_base
,
3509 (unsigned int *) cache_ovly_table
,
3510 cache_novlys
* 4, word_size
, byte_order
);
3512 return 1; /* SUCCESS */
3515 /* Function: simple_overlay_update_1
3516 A helper function for simple_overlay_update. Assuming a cached copy
3517 of _ovly_table exists, look through it to find an entry whose vma,
3518 lma and size match those of OSECT. Re-read the entry and make sure
3519 it still matches OSECT (else the table may no longer be valid).
3520 Set OSECT's mapped state to match the entry. Return: 1 for
3521 success, 0 for failure. */
3524 simple_overlay_update_1 (struct obj_section
*osect
)
3527 bfd
*obfd
= osect
->objfile
->obfd
;
3528 asection
*bsect
= osect
->the_bfd_section
;
3529 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3530 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3531 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3533 for (i
= 0; i
< cache_novlys
; i
++)
3534 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3535 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3537 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3538 (unsigned int *) cache_ovly_table
[i
],
3539 4, word_size
, byte_order
);
3540 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3541 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3543 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3546 else /* Warning! Warning! Target's ovly table has changed! */
3552 /* Function: simple_overlay_update
3553 If OSECT is NULL, then update all sections' mapped state
3554 (after re-reading the entire target _ovly_table).
3555 If OSECT is non-NULL, then try to find a matching entry in the
3556 cached ovly_table and update only OSECT's mapped state.
3557 If a cached entry can't be found or the cache isn't valid, then
3558 re-read the entire cache, and go ahead and update all sections. */
3561 simple_overlay_update (struct obj_section
*osect
)
3563 struct objfile
*objfile
;
3565 /* Were we given an osect to look up? NULL means do all of them. */
3567 /* Have we got a cached copy of the target's overlay table? */
3568 if (cache_ovly_table
!= NULL
)
3570 /* Does its cached location match what's currently in the
3572 struct bound_minimal_symbol minsym
3573 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3575 if (minsym
.minsym
== NULL
)
3576 error (_("Error reading inferior's overlay table: couldn't "
3577 "find `_ovly_table' array\n"
3578 "in inferior. Use `overlay manual' mode."));
3580 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3581 /* Then go ahead and try to look up this single section in
3583 if (simple_overlay_update_1 (osect
))
3584 /* Found it! We're done. */
3588 /* Cached table no good: need to read the entire table anew.
3589 Or else we want all the sections, in which case it's actually
3590 more efficient to read the whole table in one block anyway. */
3592 if (! simple_read_overlay_table ())
3595 /* Now may as well update all sections, even if only one was requested. */
3596 ALL_OBJSECTIONS (objfile
, osect
)
3597 if (section_is_overlay (osect
))
3600 bfd
*obfd
= osect
->objfile
->obfd
;
3601 asection
*bsect
= osect
->the_bfd_section
;
3603 for (i
= 0; i
< cache_novlys
; i
++)
3604 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3605 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3606 { /* obj_section matches i'th entry in ovly_table. */
3607 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3608 break; /* finished with inner for loop: break out. */
3613 /* Set the output sections and output offsets for section SECTP in
3614 ABFD. The relocation code in BFD will read these offsets, so we
3615 need to be sure they're initialized. We map each section to itself,
3616 with no offset; this means that SECTP->vma will be honored. */
3619 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3621 sectp
->output_section
= sectp
;
3622 sectp
->output_offset
= 0;
3625 /* Default implementation for sym_relocate. */
3628 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3631 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3633 bfd
*abfd
= sectp
->owner
;
3635 /* We're only interested in sections with relocation
3637 if ((sectp
->flags
& SEC_RELOC
) == 0)
3640 /* We will handle section offsets properly elsewhere, so relocate as if
3641 all sections begin at 0. */
3642 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3644 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3647 /* Relocate the contents of a debug section SECTP in ABFD. The
3648 contents are stored in BUF if it is non-NULL, or returned in a
3649 malloc'd buffer otherwise.
3651 For some platforms and debug info formats, shared libraries contain
3652 relocations against the debug sections (particularly for DWARF-2;
3653 one affected platform is PowerPC GNU/Linux, although it depends on
3654 the version of the linker in use). Also, ELF object files naturally
3655 have unresolved relocations for their debug sections. We need to apply
3656 the relocations in order to get the locations of symbols correct.
3657 Another example that may require relocation processing, is the
3658 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3662 symfile_relocate_debug_section (struct objfile
*objfile
,
3663 asection
*sectp
, bfd_byte
*buf
)
3665 gdb_assert (objfile
->sf
->sym_relocate
);
3667 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3670 struct symfile_segment_data
*
3671 get_symfile_segment_data (bfd
*abfd
)
3673 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3678 return sf
->sym_segments (abfd
);
3682 free_symfile_segment_data (struct symfile_segment_data
*data
)
3684 xfree (data
->segment_bases
);
3685 xfree (data
->segment_sizes
);
3686 xfree (data
->segment_info
);
3691 - DATA, containing segment addresses from the object file ABFD, and
3692 the mapping from ABFD's sections onto the segments that own them,
3694 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3695 segment addresses reported by the target,
3696 store the appropriate offsets for each section in OFFSETS.
3698 If there are fewer entries in SEGMENT_BASES than there are segments
3699 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3701 If there are more entries, then ignore the extra. The target may
3702 not be able to distinguish between an empty data segment and a
3703 missing data segment; a missing text segment is less plausible. */
3706 symfile_map_offsets_to_segments (bfd
*abfd
,
3707 const struct symfile_segment_data
*data
,
3708 struct section_offsets
*offsets
,
3709 int num_segment_bases
,
3710 const CORE_ADDR
*segment_bases
)
3715 /* It doesn't make sense to call this function unless you have some
3716 segment base addresses. */
3717 gdb_assert (num_segment_bases
> 0);
3719 /* If we do not have segment mappings for the object file, we
3720 can not relocate it by segments. */
3721 gdb_assert (data
!= NULL
);
3722 gdb_assert (data
->num_segments
> 0);
3724 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3726 int which
= data
->segment_info
[i
];
3728 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3730 /* Don't bother computing offsets for sections that aren't
3731 loaded as part of any segment. */
3735 /* Use the last SEGMENT_BASES entry as the address of any extra
3736 segments mentioned in DATA->segment_info. */
3737 if (which
> num_segment_bases
)
3738 which
= num_segment_bases
;
3740 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3741 - data
->segment_bases
[which
- 1]);
3748 symfile_find_segment_sections (struct objfile
*objfile
)
3750 bfd
*abfd
= objfile
->obfd
;
3753 struct symfile_segment_data
*data
;
3755 data
= get_symfile_segment_data (objfile
->obfd
);
3759 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3761 free_symfile_segment_data (data
);
3765 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3767 int which
= data
->segment_info
[i
];
3771 if (objfile
->sect_index_text
== -1)
3772 objfile
->sect_index_text
= sect
->index
;
3774 if (objfile
->sect_index_rodata
== -1)
3775 objfile
->sect_index_rodata
= sect
->index
;
3777 else if (which
== 2)
3779 if (objfile
->sect_index_data
== -1)
3780 objfile
->sect_index_data
= sect
->index
;
3782 if (objfile
->sect_index_bss
== -1)
3783 objfile
->sect_index_bss
= sect
->index
;
3787 free_symfile_segment_data (data
);
3790 /* Listen for free_objfile events. */
3793 symfile_free_objfile (struct objfile
*objfile
)
3795 /* Remove the target sections owned by this objfile. */
3796 if (objfile
!= NULL
)
3797 remove_target_sections ((void *) objfile
);
3800 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3801 Expand all symtabs that match the specified criteria.
3802 See quick_symbol_functions.expand_symtabs_matching for details. */
3805 expand_symtabs_matching
3806 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3807 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3808 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3809 enum search_domain kind
)
3811 struct objfile
*objfile
;
3813 ALL_OBJFILES (objfile
)
3816 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3818 expansion_notify
, kind
);
3822 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3823 Map function FUN over every file.
3824 See quick_symbol_functions.map_symbol_filenames for details. */
3827 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3830 struct objfile
*objfile
;
3832 ALL_OBJFILES (objfile
)
3835 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3841 _initialize_symfile (void)
3843 struct cmd_list_element
*c
;
3845 observer_attach_free_objfile (symfile_free_objfile
);
3847 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3848 Load symbol table from executable file FILE.\n\
3849 The `file' command can also load symbol tables, as well as setting the file\n\
3850 to execute."), &cmdlist
);
3851 set_cmd_completer (c
, filename_completer
);
3853 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3854 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3855 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3856 ...]\nADDR is the starting address of the file's text.\n\
3857 The optional arguments are section-name section-address pairs and\n\
3858 should be specified if the data and bss segments are not contiguous\n\
3859 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3861 set_cmd_completer (c
, filename_completer
);
3863 c
= add_cmd ("remove-symbol-file", class_files
,
3864 remove_symbol_file_command
, _("\
3865 Remove a symbol file added via the add-symbol-file command.\n\
3866 Usage: remove-symbol-file FILENAME\n\
3867 remove-symbol-file -a ADDRESS\n\
3868 The file to remove can be identified by its filename or by an address\n\
3869 that lies within the boundaries of this symbol file in memory."),
3872 c
= add_cmd ("load", class_files
, load_command
, _("\
3873 Dynamically load FILE into the running program, and record its symbols\n\
3874 for access from GDB.\n\
3875 An optional load OFFSET may also be given as a literal address.\n\
3876 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3878 Usage: load [FILE] [OFFSET]"), &cmdlist
);
3879 set_cmd_completer (c
, filename_completer
);
3881 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3882 _("Commands for debugging overlays."), &overlaylist
,
3883 "overlay ", 0, &cmdlist
);
3885 add_com_alias ("ovly", "overlay", class_alias
, 1);
3886 add_com_alias ("ov", "overlay", class_alias
, 1);
3888 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3889 _("Assert that an overlay section is mapped."), &overlaylist
);
3891 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3892 _("Assert that an overlay section is unmapped."), &overlaylist
);
3894 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3895 _("List mappings of overlay sections."), &overlaylist
);
3897 add_cmd ("manual", class_support
, overlay_manual_command
,
3898 _("Enable overlay debugging."), &overlaylist
);
3899 add_cmd ("off", class_support
, overlay_off_command
,
3900 _("Disable overlay debugging."), &overlaylist
);
3901 add_cmd ("auto", class_support
, overlay_auto_command
,
3902 _("Enable automatic overlay debugging."), &overlaylist
);
3903 add_cmd ("load-target", class_support
, overlay_load_command
,
3904 _("Read the overlay mapping state from the target."), &overlaylist
);
3906 /* Filename extension to source language lookup table: */
3907 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3909 Set mapping between filename extension and source language."), _("\
3910 Show mapping between filename extension and source language."), _("\
3911 Usage: set extension-language .foo bar"),
3912 set_ext_lang_command
,
3914 &setlist
, &showlist
);
3916 add_info ("extensions", info_ext_lang_command
,
3917 _("All filename extensions associated with a source language."));
3919 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3920 &debug_file_directory
, _("\
3921 Set the directories where separate debug symbols are searched for."), _("\
3922 Show the directories where separate debug symbols are searched for."), _("\
3923 Separate debug symbols are first searched for in the same\n\
3924 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3925 and lastly at the path of the directory of the binary with\n\
3926 each global debug-file-directory component prepended."),
3928 show_debug_file_directory
,
3929 &setlist
, &showlist
);
3931 add_setshow_enum_cmd ("symbol-loading", no_class
,
3932 print_symbol_loading_enums
, &print_symbol_loading
,
3934 Set printing of symbol loading messages."), _("\
3935 Show printing of symbol loading messages."), _("\
3936 off == turn all messages off\n\
3937 brief == print messages for the executable,\n\
3938 and brief messages for shared libraries\n\
3939 full == print messages for the executable,\n\
3940 and messages for each shared library."),
3943 &setprintlist
, &showprintlist
);
3945 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3946 &separate_debug_file_debug
, _("\
3947 Set printing of separate debug info file search debug."), _("\
3948 Show printing of separate debug info file search debug."), _("\
3949 When on, GDB prints the searched locations while looking for separate debug \
3950 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);