1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2018 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"
49 #include "observable.h"
51 #include "parser-defs.h"
58 #include "cli/cli-utils.h"
59 #include "common/byte-vector.h"
62 #include <sys/types.h>
71 int (*deprecated_ui_load_progress_hook
) (const char *section
,
73 void (*deprecated_show_load_progress
) (const char *section
,
74 unsigned long section_sent
,
75 unsigned long section_size
,
76 unsigned long total_sent
,
77 unsigned long total_size
);
78 void (*deprecated_pre_add_symbol_hook
) (const char *);
79 void (*deprecated_post_add_symbol_hook
) (void);
81 static void clear_symtab_users_cleanup (void *ignore
);
83 /* Global variables owned by this file. */
84 int readnow_symbol_files
; /* Read full symbols immediately. */
85 int readnever_symbol_files
; /* Never read full symbols. */
87 /* Functions this file defines. */
89 static void symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
90 objfile_flags flags
, CORE_ADDR reloff
);
92 static const struct sym_fns
*find_sym_fns (bfd
*);
94 static void overlay_invalidate_all (void);
96 static void simple_free_overlay_table (void);
98 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
101 static int simple_read_overlay_table (void);
103 static int simple_overlay_update_1 (struct obj_section
*);
105 static void symfile_find_segment_sections (struct objfile
*objfile
);
107 /* List of all available sym_fns. On gdb startup, each object file reader
108 calls add_symtab_fns() to register information on each format it is
111 struct registered_sym_fns
113 registered_sym_fns (bfd_flavour sym_flavour_
, const struct sym_fns
*sym_fns_
)
114 : sym_flavour (sym_flavour_
), sym_fns (sym_fns_
)
117 /* BFD flavour that we handle. */
118 enum bfd_flavour sym_flavour
;
120 /* The "vtable" of symbol functions. */
121 const struct sym_fns
*sym_fns
;
124 static std::vector
<registered_sym_fns
> symtab_fns
;
126 /* Values for "set print symbol-loading". */
128 const char print_symbol_loading_off
[] = "off";
129 const char print_symbol_loading_brief
[] = "brief";
130 const char print_symbol_loading_full
[] = "full";
131 static const char *print_symbol_loading_enums
[] =
133 print_symbol_loading_off
,
134 print_symbol_loading_brief
,
135 print_symbol_loading_full
,
138 static const char *print_symbol_loading
= print_symbol_loading_full
;
140 /* If non-zero, shared library symbols will be added automatically
141 when the inferior is created, new libraries are loaded, or when
142 attaching to the inferior. This is almost always what users will
143 want to have happen; but for very large programs, the startup time
144 will be excessive, and so if this is a problem, the user can clear
145 this flag and then add the shared library symbols as needed. Note
146 that there is a potential for confusion, since if the shared
147 library symbols are not loaded, commands like "info fun" will *not*
148 report all the functions that are actually present. */
150 int auto_solib_add
= 1;
153 /* Return non-zero if symbol-loading messages should be printed.
154 FROM_TTY is the standard from_tty argument to gdb commands.
155 If EXEC is non-zero the messages are for the executable.
156 Otherwise, messages are for shared libraries.
157 If FULL is non-zero then the caller is printing a detailed message.
158 E.g., the message includes the shared library name.
159 Otherwise, the caller is printing a brief "summary" message. */
162 print_symbol_loading_p (int from_tty
, int exec
, int full
)
164 if (!from_tty
&& !info_verbose
)
169 /* We don't check FULL for executables, there are few such
170 messages, therefore brief == full. */
171 return print_symbol_loading
!= print_symbol_loading_off
;
174 return print_symbol_loading
== print_symbol_loading_full
;
175 return print_symbol_loading
== print_symbol_loading_brief
;
178 /* True if we are reading a symbol table. */
180 int currently_reading_symtab
= 0;
182 /* Increment currently_reading_symtab and return a cleanup that can be
183 used to decrement it. */
185 scoped_restore_tmpl
<int>
186 increment_reading_symtab (void)
188 gdb_assert (currently_reading_symtab
>= 0);
189 return make_scoped_restore (¤tly_reading_symtab
,
190 currently_reading_symtab
+ 1);
193 /* Remember the lowest-addressed loadable section we've seen.
194 This function is called via bfd_map_over_sections.
196 In case of equal vmas, the section with the largest size becomes the
197 lowest-addressed loadable section.
199 If the vmas and sizes are equal, the last section is considered the
200 lowest-addressed loadable section. */
203 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
205 asection
**lowest
= (asection
**) obj
;
207 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
210 *lowest
= sect
; /* First loadable section */
211 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
212 *lowest
= sect
; /* A lower loadable section */
213 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
214 && (bfd_section_size (abfd
, (*lowest
))
215 <= bfd_section_size (abfd
, sect
)))
219 /* Build (allocate and populate) a section_addr_info struct from
220 an existing section table. */
223 build_section_addr_info_from_section_table (const struct target_section
*start
,
224 const struct target_section
*end
)
226 const struct target_section
*stp
;
228 section_addr_info sap
;
230 for (stp
= start
; stp
!= end
; stp
++)
232 struct bfd_section
*asect
= stp
->the_bfd_section
;
233 bfd
*abfd
= asect
->owner
;
235 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
236 && sap
.size () < end
- start
)
237 sap
.emplace_back (stp
->addr
,
238 bfd_section_name (abfd
, asect
),
239 gdb_bfd_section_index (abfd
, asect
));
245 /* Create a section_addr_info from section offsets in ABFD. */
247 static section_addr_info
248 build_section_addr_info_from_bfd (bfd
*abfd
)
250 struct bfd_section
*sec
;
252 section_addr_info sap
;
253 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
254 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
255 sap
.emplace_back (bfd_get_section_vma (abfd
, sec
),
256 bfd_get_section_name (abfd
, sec
),
257 gdb_bfd_section_index (abfd
, sec
));
262 /* Create a section_addr_info from section offsets in OBJFILE. */
265 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
269 /* Before reread_symbols gets rewritten it is not safe to call:
270 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
272 section_addr_info sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
273 for (i
= 0; i
< sap
.size (); i
++)
275 int sectindex
= sap
[i
].sectindex
;
277 sap
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
282 /* Initialize OBJFILE's sect_index_* members. */
285 init_objfile_sect_indices (struct objfile
*objfile
)
290 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
292 objfile
->sect_index_text
= sect
->index
;
294 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
296 objfile
->sect_index_data
= sect
->index
;
298 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
300 objfile
->sect_index_bss
= sect
->index
;
302 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
304 objfile
->sect_index_rodata
= sect
->index
;
306 /* This is where things get really weird... We MUST have valid
307 indices for the various sect_index_* members or gdb will abort.
308 So if for example, there is no ".text" section, we have to
309 accomodate that. First, check for a file with the standard
310 one or two segments. */
312 symfile_find_segment_sections (objfile
);
314 /* Except when explicitly adding symbol files at some address,
315 section_offsets contains nothing but zeros, so it doesn't matter
316 which slot in section_offsets the individual sect_index_* members
317 index into. So if they are all zero, it is safe to just point
318 all the currently uninitialized indices to the first slot. But
319 beware: if this is the main executable, it may be relocated
320 later, e.g. by the remote qOffsets packet, and then this will
321 be wrong! That's why we try segments first. */
323 for (i
= 0; i
< objfile
->num_sections
; i
++)
325 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
330 if (i
== objfile
->num_sections
)
332 if (objfile
->sect_index_text
== -1)
333 objfile
->sect_index_text
= 0;
334 if (objfile
->sect_index_data
== -1)
335 objfile
->sect_index_data
= 0;
336 if (objfile
->sect_index_bss
== -1)
337 objfile
->sect_index_bss
= 0;
338 if (objfile
->sect_index_rodata
== -1)
339 objfile
->sect_index_rodata
= 0;
343 /* The arguments to place_section. */
345 struct place_section_arg
347 struct section_offsets
*offsets
;
351 /* Find a unique offset to use for loadable section SECT if
352 the user did not provide an offset. */
355 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
357 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
358 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
360 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
362 /* We are only interested in allocated sections. */
363 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
366 /* If the user specified an offset, honor it. */
367 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
370 /* Otherwise, let's try to find a place for the section. */
371 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
378 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
380 int indx
= cur_sec
->index
;
382 /* We don't need to compare against ourself. */
386 /* We can only conflict with allocated sections. */
387 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
390 /* If the section offset is 0, either the section has not been placed
391 yet, or it was the lowest section placed (in which case LOWEST
392 will be past its end). */
393 if (offsets
[indx
] == 0)
396 /* If this section would overlap us, then we must move up. */
397 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
398 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
400 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
401 start_addr
= (start_addr
+ align
- 1) & -align
;
406 /* Otherwise, we appear to be OK. So far. */
411 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
412 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
415 /* Store section_addr_info as prepared (made relative and with SECTINDEX
416 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
420 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
422 const section_addr_info
&addrs
)
426 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
428 /* Now calculate offsets for section that were specified by the caller. */
429 for (i
= 0; i
< addrs
.size (); i
++)
431 const struct other_sections
*osp
;
434 if (osp
->sectindex
== -1)
437 /* Record all sections in offsets. */
438 /* The section_offsets in the objfile are here filled in using
440 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
444 /* Transform section name S for a name comparison. prelink can split section
445 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
446 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
447 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
448 (`.sbss') section has invalid (increased) virtual address. */
451 addr_section_name (const char *s
)
453 if (strcmp (s
, ".dynbss") == 0)
455 if (strcmp (s
, ".sdynbss") == 0)
461 /* std::sort comparator for addrs_section_sort. Sort entries in
462 ascending order by their (name, sectindex) pair. sectindex makes
463 the sort by name stable. */
466 addrs_section_compar (const struct other_sections
*a
,
467 const struct other_sections
*b
)
471 retval
= strcmp (addr_section_name (a
->name
.c_str ()),
472 addr_section_name (b
->name
.c_str ()));
476 return a
->sectindex
< b
->sectindex
;
479 /* Provide sorted array of pointers to sections of ADDRS. */
481 static std::vector
<const struct other_sections
*>
482 addrs_section_sort (const section_addr_info
&addrs
)
486 std::vector
<const struct other_sections
*> array (addrs
.size ());
487 for (i
= 0; i
< addrs
.size (); i
++)
488 array
[i
] = &addrs
[i
];
490 std::sort (array
.begin (), array
.end (), addrs_section_compar
);
495 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
496 also SECTINDEXes specific to ABFD there. This function can be used to
497 rebase ADDRS to start referencing different BFD than before. */
500 addr_info_make_relative (section_addr_info
*addrs
, bfd
*abfd
)
502 asection
*lower_sect
;
503 CORE_ADDR lower_offset
;
506 /* Find lowest loadable section to be used as starting point for
507 continguous sections. */
509 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
510 if (lower_sect
== NULL
)
512 warning (_("no loadable sections found in added symbol-file %s"),
513 bfd_get_filename (abfd
));
517 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
519 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
520 in ABFD. Section names are not unique - there can be multiple sections of
521 the same name. Also the sections of the same name do not have to be
522 adjacent to each other. Some sections may be present only in one of the
523 files. Even sections present in both files do not have to be in the same
526 Use stable sort by name for the sections in both files. Then linearly
527 scan both lists matching as most of the entries as possible. */
529 std::vector
<const struct other_sections
*> addrs_sorted
530 = addrs_section_sort (*addrs
);
532 section_addr_info abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
533 std::vector
<const struct other_sections
*> abfd_addrs_sorted
534 = addrs_section_sort (abfd_addrs
);
536 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
537 ABFD_ADDRS_SORTED. */
539 std::vector
<const struct other_sections
*>
540 addrs_to_abfd_addrs (addrs
->size (), nullptr);
542 std::vector
<const struct other_sections
*>::iterator abfd_sorted_iter
543 = abfd_addrs_sorted
.begin ();
544 for (const other_sections
*sect
: addrs_sorted
)
546 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
548 while (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
549 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
553 if (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
554 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
559 /* Make the found item directly addressable from ADDRS. */
560 index_in_addrs
= sect
- addrs
->data ();
561 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
562 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_sorted_iter
;
564 /* Never use the same ABFD entry twice. */
569 /* Calculate offsets for the loadable sections.
570 FIXME! Sections must be in order of increasing loadable section
571 so that contiguous sections can use the lower-offset!!!
573 Adjust offsets if the segments are not contiguous.
574 If the section is contiguous, its offset should be set to
575 the offset of the highest loadable section lower than it
576 (the loadable section directly below it in memory).
577 this_offset = lower_offset = lower_addr - lower_orig_addr */
579 for (i
= 0; i
< addrs
->size (); i
++)
581 const struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
585 /* This is the index used by BFD. */
586 (*addrs
)[i
].sectindex
= sect
->sectindex
;
588 if ((*addrs
)[i
].addr
!= 0)
590 (*addrs
)[i
].addr
-= sect
->addr
;
591 lower_offset
= (*addrs
)[i
].addr
;
594 (*addrs
)[i
].addr
= lower_offset
;
598 /* addr_section_name transformation is not used for SECT_NAME. */
599 const std::string
§_name
= (*addrs
)[i
].name
;
601 /* This section does not exist in ABFD, which is normally
602 unexpected and we want to issue a warning.
604 However, the ELF prelinker does create a few sections which are
605 marked in the main executable as loadable (they are loaded in
606 memory from the DYNAMIC segment) and yet are not present in
607 separate debug info files. This is fine, and should not cause
608 a warning. Shared libraries contain just the section
609 ".gnu.liblist" but it is not marked as loadable there. There is
610 no other way to identify them than by their name as the sections
611 created by prelink have no special flags.
613 For the sections `.bss' and `.sbss' see addr_section_name. */
615 if (!(sect_name
== ".gnu.liblist"
616 || sect_name
== ".gnu.conflict"
617 || (sect_name
== ".bss"
619 && (*addrs
)[i
- 1].name
== ".dynbss"
620 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
621 || (sect_name
== ".sbss"
623 && (*addrs
)[i
- 1].name
== ".sdynbss"
624 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
625 warning (_("section %s not found in %s"), sect_name
.c_str (),
626 bfd_get_filename (abfd
));
628 (*addrs
)[i
].addr
= 0;
629 (*addrs
)[i
].sectindex
= -1;
634 /* Parse the user's idea of an offset for dynamic linking, into our idea
635 of how to represent it for fast symbol reading. This is the default
636 version of the sym_fns.sym_offsets function for symbol readers that
637 don't need to do anything special. It allocates a section_offsets table
638 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
641 default_symfile_offsets (struct objfile
*objfile
,
642 const section_addr_info
&addrs
)
644 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
645 objfile
->section_offsets
= (struct section_offsets
*)
646 obstack_alloc (&objfile
->objfile_obstack
,
647 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
648 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
649 objfile
->num_sections
, addrs
);
651 /* For relocatable files, all loadable sections will start at zero.
652 The zero is meaningless, so try to pick arbitrary addresses such
653 that no loadable sections overlap. This algorithm is quadratic,
654 but the number of sections in a single object file is generally
656 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
658 struct place_section_arg arg
;
659 bfd
*abfd
= objfile
->obfd
;
662 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
663 /* We do not expect this to happen; just skip this step if the
664 relocatable file has a section with an assigned VMA. */
665 if (bfd_section_vma (abfd
, cur_sec
) != 0)
670 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
672 /* Pick non-overlapping offsets for sections the user did not
674 arg
.offsets
= objfile
->section_offsets
;
676 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
678 /* Correctly filling in the section offsets is not quite
679 enough. Relocatable files have two properties that
680 (most) shared objects do not:
682 - Their debug information will contain relocations. Some
683 shared libraries do also, but many do not, so this can not
686 - If there are multiple code sections they will be loaded
687 at different relative addresses in memory than they are
688 in the objfile, since all sections in the file will start
691 Because GDB has very limited ability to map from an
692 address in debug info to the correct code section,
693 it relies on adding SECT_OFF_TEXT to things which might be
694 code. If we clear all the section offsets, and set the
695 section VMAs instead, then symfile_relocate_debug_section
696 will return meaningful debug information pointing at the
699 GDB has too many different data structures for section
700 addresses - a bfd, objfile, and so_list all have section
701 tables, as does exec_ops. Some of these could probably
704 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
705 cur_sec
= cur_sec
->next
)
707 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
710 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
711 exec_set_section_address (bfd_get_filename (abfd
),
713 offsets
[cur_sec
->index
]);
714 offsets
[cur_sec
->index
] = 0;
719 /* Remember the bfd indexes for the .text, .data, .bss and
721 init_objfile_sect_indices (objfile
);
724 /* Divide the file into segments, which are individual relocatable units.
725 This is the default version of the sym_fns.sym_segments function for
726 symbol readers that do not have an explicit representation of segments.
727 It assumes that object files do not have segments, and fully linked
728 files have a single segment. */
730 struct symfile_segment_data
*
731 default_symfile_segments (bfd
*abfd
)
735 struct symfile_segment_data
*data
;
738 /* Relocatable files contain enough information to position each
739 loadable section independently; they should not be relocated
741 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
744 /* Make sure there is at least one loadable section in the file. */
745 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
747 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
755 low
= bfd_get_section_vma (abfd
, sect
);
756 high
= low
+ bfd_get_section_size (sect
);
758 data
= XCNEW (struct symfile_segment_data
);
759 data
->num_segments
= 1;
760 data
->segment_bases
= XCNEW (CORE_ADDR
);
761 data
->segment_sizes
= XCNEW (CORE_ADDR
);
763 num_sections
= bfd_count_sections (abfd
);
764 data
->segment_info
= XCNEWVEC (int, num_sections
);
766 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
770 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
773 vma
= bfd_get_section_vma (abfd
, sect
);
776 if (vma
+ bfd_get_section_size (sect
) > high
)
777 high
= vma
+ bfd_get_section_size (sect
);
779 data
->segment_info
[i
] = 1;
782 data
->segment_bases
[0] = low
;
783 data
->segment_sizes
[0] = high
- low
;
788 /* This is a convenience function to call sym_read for OBJFILE and
789 possibly force the partial symbols to be read. */
792 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
794 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
795 objfile
->per_bfd
->minsyms_read
= true;
797 /* find_separate_debug_file_in_section should be called only if there is
798 single binary with no existing separate debug info file. */
799 if (!objfile_has_partial_symbols (objfile
)
800 && objfile
->separate_debug_objfile
== NULL
801 && objfile
->separate_debug_objfile_backlink
== NULL
)
803 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
807 /* find_separate_debug_file_in_section uses the same filename for the
808 virtual section-as-bfd like the bfd filename containing the
809 section. Therefore use also non-canonical name form for the same
810 file containing the section. */
811 symbol_file_add_separate (abfd
.get (),
812 bfd_get_filename (abfd
.get ()),
813 add_flags
| SYMFILE_NOT_FILENAME
, objfile
);
816 if ((add_flags
& SYMFILE_NO_READ
) == 0)
817 require_partial_symbols (objfile
, 0);
820 /* Initialize entry point information for this objfile. */
823 init_entry_point_info (struct objfile
*objfile
)
825 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
831 /* Save startup file's range of PC addresses to help blockframe.c
832 decide where the bottom of the stack is. */
834 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
836 /* Executable file -- record its entry point so we'll recognize
837 the startup file because it contains the entry point. */
838 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
839 ei
->entry_point_p
= 1;
841 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
842 && bfd_get_start_address (objfile
->obfd
) != 0)
844 /* Some shared libraries may have entry points set and be
845 runnable. There's no clear way to indicate this, so just check
846 for values other than zero. */
847 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
848 ei
->entry_point_p
= 1;
852 /* Examination of non-executable.o files. Short-circuit this stuff. */
853 ei
->entry_point_p
= 0;
856 if (ei
->entry_point_p
)
858 struct obj_section
*osect
;
859 CORE_ADDR entry_point
= ei
->entry_point
;
862 /* Make certain that the address points at real code, and not a
863 function descriptor. */
865 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
867 current_top_target ());
869 /* Remove any ISA markers, so that this matches entries in the
872 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
875 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
877 struct bfd_section
*sect
= osect
->the_bfd_section
;
879 if (entry_point
>= bfd_get_section_vma (objfile
->obfd
, sect
)
880 && entry_point
< (bfd_get_section_vma (objfile
->obfd
, sect
)
881 + bfd_get_section_size (sect
)))
883 ei
->the_bfd_section_index
884 = gdb_bfd_section_index (objfile
->obfd
, sect
);
891 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
895 /* Process a symbol file, as either the main file or as a dynamically
898 This function does not set the OBJFILE's entry-point info.
900 OBJFILE is where the symbols are to be read from.
902 ADDRS is the list of section load addresses. If the user has given
903 an 'add-symbol-file' command, then this is the list of offsets and
904 addresses he or she provided as arguments to the command; or, if
905 we're handling a shared library, these are the actual addresses the
906 sections are loaded at, according to the inferior's dynamic linker
907 (as gleaned by GDB's shared library code). We convert each address
908 into an offset from the section VMA's as it appears in the object
909 file, and then call the file's sym_offsets function to convert this
910 into a format-specific offset table --- a `struct section_offsets'.
911 The sectindex field is used to control the ordering of sections
912 with the same name. Upon return, it is updated to contain the
913 correspondig BFD section index, or -1 if the section was not found.
915 ADD_FLAGS encodes verbosity level, whether this is main symbol or
916 an extra symbol file such as dynamically loaded code, and wether
917 breakpoint reset should be deferred. */
920 syms_from_objfile_1 (struct objfile
*objfile
,
921 section_addr_info
*addrs
,
922 symfile_add_flags add_flags
)
924 section_addr_info local_addr
;
925 struct cleanup
*old_chain
;
926 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
928 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
930 if (objfile
->sf
== NULL
)
932 /* No symbols to load, but we still need to make sure
933 that the section_offsets table is allocated. */
934 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
935 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
937 objfile
->num_sections
= num_sections
;
938 objfile
->section_offsets
939 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
941 memset (objfile
->section_offsets
, 0, size
);
945 /* Make sure that partially constructed symbol tables will be cleaned up
946 if an error occurs during symbol reading. */
947 old_chain
= make_cleanup (null_cleanup
, NULL
);
948 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
950 /* If ADDRS is NULL, put together a dummy address list.
951 We now establish the convention that an addr of zero means
952 no load address was specified. */
958 /* We will modify the main symbol table, make sure that all its users
959 will be cleaned up if an error occurs during symbol reading. */
960 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
962 /* Since no error yet, throw away the old symbol table. */
964 if (symfile_objfile
!= NULL
)
966 delete symfile_objfile
;
967 gdb_assert (symfile_objfile
== NULL
);
970 /* Currently we keep symbols from the add-symbol-file command.
971 If the user wants to get rid of them, they should do "symbol-file"
972 without arguments first. Not sure this is the best behavior
975 (*objfile
->sf
->sym_new_init
) (objfile
);
978 /* Convert addr into an offset rather than an absolute address.
979 We find the lowest address of a loaded segment in the objfile,
980 and assume that <addr> is where that got loaded.
982 We no longer warn if the lowest section is not a text segment (as
983 happens for the PA64 port. */
984 if (addrs
->size () > 0)
985 addr_info_make_relative (addrs
, objfile
->obfd
);
987 /* Initialize symbol reading routines for this objfile, allow complaints to
988 appear for this new file, and record how verbose to be, then do the
989 initial symbol reading for this file. */
991 (*objfile
->sf
->sym_init
) (objfile
);
992 clear_complaints (1);
994 (*objfile
->sf
->sym_offsets
) (objfile
, *addrs
);
996 read_symbols (objfile
, add_flags
);
998 /* Discard cleanups as symbol reading was successful. */
1000 objfile_holder
.release ();
1001 discard_cleanups (old_chain
);
1004 /* Same as syms_from_objfile_1, but also initializes the objfile
1005 entry-point info. */
1008 syms_from_objfile (struct objfile
*objfile
,
1009 section_addr_info
*addrs
,
1010 symfile_add_flags add_flags
)
1012 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1013 init_entry_point_info (objfile
);
1016 /* Perform required actions after either reading in the initial
1017 symbols for a new objfile, or mapping in the symbols from a reusable
1018 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1021 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1023 /* If this is the main symbol file we have to clean up all users of the
1024 old main symbol file. Otherwise it is sufficient to fixup all the
1025 breakpoints that may have been redefined by this symbol file. */
1026 if (add_flags
& SYMFILE_MAINLINE
)
1028 /* OK, make it the "real" symbol file. */
1029 symfile_objfile
= objfile
;
1031 clear_symtab_users (add_flags
);
1033 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1035 breakpoint_re_set ();
1038 /* We're done reading the symbol file; finish off complaints. */
1039 clear_complaints (0);
1042 /* Process a symbol file, as either the main file or as a dynamically
1045 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1046 A new reference is acquired by this function.
1048 For NAME description see the objfile constructor.
1050 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1051 extra, such as dynamically loaded code, and what to do with breakpoins.
1053 ADDRS is as described for syms_from_objfile_1, above.
1054 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1056 PARENT is the original objfile if ABFD is a separate debug info file.
1057 Otherwise PARENT is NULL.
1059 Upon success, returns a pointer to the objfile that was added.
1060 Upon failure, jumps back to command level (never returns). */
1062 static struct objfile
*
1063 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1064 symfile_add_flags add_flags
,
1065 section_addr_info
*addrs
,
1066 objfile_flags flags
, struct objfile
*parent
)
1068 struct objfile
*objfile
;
1069 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1070 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1071 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1072 && (readnow_symbol_files
1073 || (add_flags
& SYMFILE_NO_READ
) == 0));
1075 if (readnow_symbol_files
)
1077 flags
|= OBJF_READNOW
;
1078 add_flags
&= ~SYMFILE_NO_READ
;
1080 else if (readnever_symbol_files
1081 || (parent
!= NULL
&& (parent
->flags
& OBJF_READNEVER
)))
1083 flags
|= OBJF_READNEVER
;
1084 add_flags
|= SYMFILE_NO_READ
;
1086 if ((add_flags
& SYMFILE_NOT_FILENAME
) != 0)
1087 flags
|= OBJF_NOT_FILENAME
;
1089 /* Give user a chance to burp if we'd be
1090 interactively wiping out any existing symbols. */
1092 if ((have_full_symbols () || have_partial_symbols ())
1095 && !query (_("Load new symbol table from \"%s\"? "), name
))
1096 error (_("Not confirmed."));
1099 flags
|= OBJF_MAINLINE
;
1100 objfile
= new struct objfile (abfd
, name
, flags
);
1103 add_separate_debug_objfile (objfile
, parent
);
1105 /* We either created a new mapped symbol table, mapped an existing
1106 symbol table file which has not had initial symbol reading
1107 performed, or need to read an unmapped symbol table. */
1110 if (deprecated_pre_add_symbol_hook
)
1111 deprecated_pre_add_symbol_hook (name
);
1114 printf_unfiltered (_("Reading symbols from %s..."), name
);
1116 gdb_flush (gdb_stdout
);
1119 syms_from_objfile (objfile
, addrs
, add_flags
);
1121 /* We now have at least a partial symbol table. Check to see if the
1122 user requested that all symbols be read on initial access via either
1123 the gdb startup command line or on a per symbol file basis. Expand
1124 all partial symbol tables for this objfile if so. */
1126 if ((flags
& OBJF_READNOW
))
1130 printf_unfiltered (_("expanding to full symbols..."));
1132 gdb_flush (gdb_stdout
);
1136 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1139 if (should_print
&& !objfile_has_symbols (objfile
))
1142 printf_unfiltered (_("(no debugging symbols found)..."));
1148 if (deprecated_post_add_symbol_hook
)
1149 deprecated_post_add_symbol_hook ();
1151 printf_unfiltered (_("done.\n"));
1154 /* We print some messages regardless of whether 'from_tty ||
1155 info_verbose' is true, so make sure they go out at the right
1157 gdb_flush (gdb_stdout
);
1159 if (objfile
->sf
== NULL
)
1161 gdb::observers::new_objfile
.notify (objfile
);
1162 return objfile
; /* No symbols. */
1165 finish_new_objfile (objfile
, add_flags
);
1167 gdb::observers::new_objfile
.notify (objfile
);
1169 bfd_cache_close_all ();
1173 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1174 see the objfile constructor. */
1177 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1178 symfile_add_flags symfile_flags
,
1179 struct objfile
*objfile
)
1181 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1182 because sections of BFD may not match sections of OBJFILE and because
1183 vma may have been modified by tools such as prelink. */
1184 section_addr_info sap
= build_section_addr_info_from_objfile (objfile
);
1186 symbol_file_add_with_addrs
1187 (bfd
, name
, symfile_flags
, &sap
,
1188 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1193 /* Process the symbol file ABFD, as either the main file or as a
1194 dynamically loaded file.
1195 See symbol_file_add_with_addrs's comments for details. */
1198 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1199 symfile_add_flags add_flags
,
1200 section_addr_info
*addrs
,
1201 objfile_flags flags
, struct objfile
*parent
)
1203 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1207 /* Process a symbol file, as either the main file or as a dynamically
1208 loaded file. See symbol_file_add_with_addrs's comments for details. */
1211 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1212 section_addr_info
*addrs
, objfile_flags flags
)
1214 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1216 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1220 /* Call symbol_file_add() with default values and update whatever is
1221 affected by the loading of a new main().
1222 Used when the file is supplied in the gdb command line
1223 and by some targets with special loading requirements.
1224 The auxiliary function, symbol_file_add_main_1(), has the flags
1225 argument for the switches that can only be specified in the symbol_file
1229 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1231 symbol_file_add_main_1 (args
, add_flags
, 0, 0);
1235 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1236 objfile_flags flags
, CORE_ADDR reloff
)
1238 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1240 struct objfile
*objfile
= symbol_file_add (args
, add_flags
, NULL
, flags
);
1242 objfile_rebase (objfile
, reloff
);
1244 /* Getting new symbols may change our opinion about
1245 what is frameless. */
1246 reinit_frame_cache ();
1248 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1249 set_initial_language ();
1253 symbol_file_clear (int from_tty
)
1255 if ((have_full_symbols () || have_partial_symbols ())
1258 ? !query (_("Discard symbol table from `%s'? "),
1259 objfile_name (symfile_objfile
))
1260 : !query (_("Discard symbol table? "))))
1261 error (_("Not confirmed."));
1263 /* solib descriptors may have handles to objfiles. Wipe them before their
1264 objfiles get stale by free_all_objfiles. */
1265 no_shared_libraries (NULL
, from_tty
);
1267 free_all_objfiles ();
1269 gdb_assert (symfile_objfile
== NULL
);
1271 printf_unfiltered (_("No symbol file now.\n"));
1274 /* See symfile.h. */
1276 int separate_debug_file_debug
= 0;
1279 separate_debug_file_exists (const std::string
&name
, unsigned long crc
,
1280 struct objfile
*parent_objfile
)
1282 unsigned long file_crc
;
1284 struct stat parent_stat
, abfd_stat
;
1285 int verified_as_different
;
1287 /* Find a separate debug info file as if symbols would be present in
1288 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1289 section can contain just the basename of PARENT_OBJFILE without any
1290 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1291 the separate debug infos with the same basename can exist. */
1293 if (filename_cmp (name
.c_str (), objfile_name (parent_objfile
)) == 0)
1296 if (separate_debug_file_debug
)
1297 printf_unfiltered (_(" Trying %s\n"), name
.c_str ());
1299 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
.c_str (), gnutarget
, -1));
1304 /* Verify symlinks were not the cause of filename_cmp name difference above.
1306 Some operating systems, e.g. Windows, do not provide a meaningful
1307 st_ino; they always set it to zero. (Windows does provide a
1308 meaningful st_dev.) Files accessed from gdbservers that do not
1309 support the vFile:fstat packet will also have st_ino set to zero.
1310 Do not indicate a duplicate library in either case. While there
1311 is no guarantee that a system that provides meaningful inode
1312 numbers will never set st_ino to zero, this is merely an
1313 optimization, so we do not need to worry about false negatives. */
1315 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1316 && abfd_stat
.st_ino
!= 0
1317 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1319 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1320 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1322 verified_as_different
= 1;
1325 verified_as_different
= 0;
1327 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1332 if (crc
!= file_crc
)
1334 unsigned long parent_crc
;
1336 /* If the files could not be verified as different with
1337 bfd_stat then we need to calculate the parent's CRC
1338 to verify whether the files are different or not. */
1340 if (!verified_as_different
)
1342 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1346 if (verified_as_different
|| parent_crc
!= file_crc
)
1347 warning (_("the debug information found in \"%s\""
1348 " does not match \"%s\" (CRC mismatch).\n"),
1349 name
.c_str (), objfile_name (parent_objfile
));
1357 char *debug_file_directory
= NULL
;
1359 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1360 struct cmd_list_element
*c
, const char *value
)
1362 fprintf_filtered (file
,
1363 _("The directory where separate debug "
1364 "symbols are searched for is \"%s\".\n"),
1368 #if ! defined (DEBUG_SUBDIRECTORY)
1369 #define DEBUG_SUBDIRECTORY ".debug"
1372 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1373 where the original file resides (may not be the same as
1374 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1375 looking for. CANON_DIR is the "realpath" form of DIR.
1376 DIR must contain a trailing '/'.
1377 Returns the path of the file with separate debug info, or an empty
1381 find_separate_debug_file (const char *dir
,
1382 const char *canon_dir
,
1383 const char *debuglink
,
1384 unsigned long crc32
, struct objfile
*objfile
)
1386 if (separate_debug_file_debug
)
1387 printf_unfiltered (_("\nLooking for separate debug info (debug link) for "
1388 "%s\n"), objfile_name (objfile
));
1390 /* First try in the same directory as the original file. */
1391 std::string debugfile
= dir
;
1392 debugfile
+= debuglink
;
1394 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1397 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1399 debugfile
+= DEBUG_SUBDIRECTORY
;
1401 debugfile
+= debuglink
;
1403 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1406 /* Then try in the global debugfile directories.
1408 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1409 cause "/..." lookups. */
1411 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
1412 = dirnames_to_char_ptr_vec (debug_file_directory
);
1414 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
1416 debugfile
= debugdir
.get ();
1419 debugfile
+= debuglink
;
1421 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1424 /* If the file is in the sysroot, try using its base path in the
1425 global debugfile directory. */
1426 if (canon_dir
!= NULL
1427 && filename_ncmp (canon_dir
, gdb_sysroot
,
1428 strlen (gdb_sysroot
)) == 0
1429 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1431 debugfile
= debugdir
.get ();
1432 debugfile
+= (canon_dir
+ strlen (gdb_sysroot
));
1434 debugfile
+= debuglink
;
1436 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1441 return std::string ();
1444 /* Modify PATH to contain only "[/]directory/" part of PATH.
1445 If there were no directory separators in PATH, PATH will be empty
1446 string on return. */
1449 terminate_after_last_dir_separator (char *path
)
1453 /* Strip off the final filename part, leaving the directory name,
1454 followed by a slash. The directory can be relative or absolute. */
1455 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1456 if (IS_DIR_SEPARATOR (path
[i
]))
1459 /* If I is -1 then no directory is present there and DIR will be "". */
1463 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1464 Returns pathname, or an empty string. */
1467 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1469 unsigned long crc32
;
1471 gdb::unique_xmalloc_ptr
<char> debuglink
1472 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1474 if (debuglink
== NULL
)
1476 /* There's no separate debug info, hence there's no way we could
1477 load it => no warning. */
1478 return std::string ();
1481 std::string dir
= objfile_name (objfile
);
1482 terminate_after_last_dir_separator (&dir
[0]);
1483 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1485 std::string debugfile
1486 = find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1487 debuglink
.get (), crc32
, objfile
);
1489 if (debugfile
.empty ())
1491 /* For PR gdb/9538, try again with realpath (if different from the
1496 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1497 && S_ISLNK (st_buf
.st_mode
))
1499 gdb::unique_xmalloc_ptr
<char> symlink_dir
1500 (lrealpath (objfile_name (objfile
)));
1501 if (symlink_dir
!= NULL
)
1503 terminate_after_last_dir_separator (symlink_dir
.get ());
1504 if (dir
!= symlink_dir
.get ())
1506 /* Different directory, so try using it. */
1507 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1520 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1524 validate_readnow_readnever (objfile_flags flags
)
1526 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1527 error (_("-readnow and -readnever cannot be used simultaneously"));
1530 /* This is the symbol-file command. Read the file, analyze its
1531 symbols, and add a struct symtab to a symtab list. The syntax of
1532 the command is rather bizarre:
1534 1. The function buildargv implements various quoting conventions
1535 which are undocumented and have little or nothing in common with
1536 the way things are quoted (or not quoted) elsewhere in GDB.
1538 2. Options are used, which are not generally used in GDB (perhaps
1539 "set mapped on", "set readnow on" would be better)
1541 3. The order of options matters, which is contrary to GNU
1542 conventions (because it is confusing and inconvenient). */
1545 symbol_file_command (const char *args
, int from_tty
)
1551 symbol_file_clear (from_tty
);
1555 objfile_flags flags
= OBJF_USERLOADED
;
1556 symfile_add_flags add_flags
= 0;
1558 bool stop_processing_options
= false;
1559 CORE_ADDR offset
= 0;
1564 add_flags
|= SYMFILE_VERBOSE
;
1566 gdb_argv
built_argv (args
);
1567 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1569 if (stop_processing_options
|| *arg
!= '-')
1574 error (_("Unrecognized argument \"%s\""), arg
);
1576 else if (strcmp (arg
, "-readnow") == 0)
1577 flags
|= OBJF_READNOW
;
1578 else if (strcmp (arg
, "-readnever") == 0)
1579 flags
|= OBJF_READNEVER
;
1580 else if (strcmp (arg
, "-o") == 0)
1582 arg
= built_argv
[++idx
];
1584 error (_("Missing argument to -o"));
1586 offset
= parse_and_eval_address (arg
);
1588 else if (strcmp (arg
, "--") == 0)
1589 stop_processing_options
= true;
1591 error (_("Unrecognized argument \"%s\""), arg
);
1595 error (_("no symbol file name was specified"));
1597 validate_readnow_readnever (flags
);
1599 symbol_file_add_main_1 (name
, add_flags
, flags
, offset
);
1603 /* Set the initial language.
1605 FIXME: A better solution would be to record the language in the
1606 psymtab when reading partial symbols, and then use it (if known) to
1607 set the language. This would be a win for formats that encode the
1608 language in an easily discoverable place, such as DWARF. For
1609 stabs, we can jump through hoops looking for specially named
1610 symbols or try to intuit the language from the specific type of
1611 stabs we find, but we can't do that until later when we read in
1615 set_initial_language (void)
1617 enum language lang
= main_language ();
1619 if (lang
== language_unknown
)
1621 char *name
= main_name ();
1622 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1625 lang
= SYMBOL_LANGUAGE (sym
);
1628 if (lang
== language_unknown
)
1630 /* Make C the default language */
1634 set_language (lang
);
1635 expected_language
= current_language
; /* Don't warn the user. */
1638 /* Open the file specified by NAME and hand it off to BFD for
1639 preliminary analysis. Return a newly initialized bfd *, which
1640 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1641 absolute). In case of trouble, error() is called. */
1644 symfile_bfd_open (const char *name
)
1648 gdb::unique_xmalloc_ptr
<char> absolute_name
;
1649 if (!is_target_filename (name
))
1651 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1653 /* Look down path for it, allocate 2nd new malloc'd copy. */
1654 desc
= openp (getenv ("PATH"),
1655 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1656 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1657 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1660 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1662 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1663 desc
= openp (getenv ("PATH"),
1664 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1665 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1669 perror_with_name (expanded_name
.get ());
1671 name
= absolute_name
.get ();
1674 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1675 if (sym_bfd
== NULL
)
1676 error (_("`%s': can't open to read symbols: %s."), name
,
1677 bfd_errmsg (bfd_get_error ()));
1679 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1680 bfd_set_cacheable (sym_bfd
.get (), 1);
1682 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1683 error (_("`%s': can't read symbols: %s."), name
,
1684 bfd_errmsg (bfd_get_error ()));
1689 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1690 the section was not found. */
1693 get_section_index (struct objfile
*objfile
, const char *section_name
)
1695 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1703 /* Link SF into the global symtab_fns list.
1704 FLAVOUR is the file format that SF handles.
1705 Called on startup by the _initialize routine in each object file format
1706 reader, to register information about each format the reader is prepared
1710 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1712 symtab_fns
.emplace_back (flavour
, sf
);
1715 /* Initialize OBJFILE to read symbols from its associated BFD. It
1716 either returns or calls error(). The result is an initialized
1717 struct sym_fns in the objfile structure, that contains cached
1718 information about the symbol file. */
1720 static const struct sym_fns
*
1721 find_sym_fns (bfd
*abfd
)
1723 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1725 if (our_flavour
== bfd_target_srec_flavour
1726 || our_flavour
== bfd_target_ihex_flavour
1727 || our_flavour
== bfd_target_tekhex_flavour
)
1728 return NULL
; /* No symbols. */
1730 for (const registered_sym_fns
&rsf
: symtab_fns
)
1731 if (our_flavour
== rsf
.sym_flavour
)
1734 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1735 bfd_get_target (abfd
));
1739 /* This function runs the load command of our current target. */
1742 load_command (const char *arg
, int from_tty
)
1746 /* The user might be reloading because the binary has changed. Take
1747 this opportunity to check. */
1748 reopen_exec_file ();
1754 const char *parg
, *prev
;
1756 arg
= get_exec_file (1);
1758 /* We may need to quote this string so buildargv can pull it
1761 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1763 temp
.append (prev
, parg
- prev
);
1765 temp
.push_back ('\\');
1767 /* If we have not copied anything yet, then we didn't see a
1768 character to quote, and we can just leave ARG unchanged. */
1772 arg
= temp
.c_str ();
1776 target_load (arg
, from_tty
);
1778 /* After re-loading the executable, we don't really know which
1779 overlays are mapped any more. */
1780 overlay_cache_invalid
= 1;
1783 /* This version of "load" should be usable for any target. Currently
1784 it is just used for remote targets, not inftarg.c or core files,
1785 on the theory that only in that case is it useful.
1787 Avoiding xmodem and the like seems like a win (a) because we don't have
1788 to worry about finding it, and (b) On VMS, fork() is very slow and so
1789 we don't want to run a subprocess. On the other hand, I'm not sure how
1790 performance compares. */
1792 static int validate_download
= 0;
1794 /* Callback service function for generic_load (bfd_map_over_sections). */
1797 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1799 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1801 *sum
+= bfd_get_section_size (asec
);
1804 /* Opaque data for load_progress. */
1805 struct load_progress_data
1807 /* Cumulative data. */
1808 unsigned long write_count
= 0;
1809 unsigned long data_count
= 0;
1810 bfd_size_type total_size
= 0;
1813 /* Opaque data for load_progress for a single section. */
1814 struct load_progress_section_data
1816 load_progress_section_data (load_progress_data
*cumulative_
,
1817 const char *section_name_
, ULONGEST section_size_
,
1818 CORE_ADDR lma_
, gdb_byte
*buffer_
)
1819 : cumulative (cumulative_
), section_name (section_name_
),
1820 section_size (section_size_
), lma (lma_
), buffer (buffer_
)
1823 struct load_progress_data
*cumulative
;
1825 /* Per-section data. */
1826 const char *section_name
;
1827 ULONGEST section_sent
= 0;
1828 ULONGEST section_size
;
1833 /* Opaque data for load_section_callback. */
1834 struct load_section_data
1836 load_section_data (load_progress_data
*progress_data_
)
1837 : progress_data (progress_data_
)
1840 ~load_section_data ()
1842 for (auto &&request
: requests
)
1844 xfree (request
.data
);
1845 delete ((load_progress_section_data
*) request
.baton
);
1849 CORE_ADDR load_offset
= 0;
1850 struct load_progress_data
*progress_data
;
1851 std::vector
<struct memory_write_request
> requests
;
1854 /* Target write callback routine for progress reporting. */
1857 load_progress (ULONGEST bytes
, void *untyped_arg
)
1859 struct load_progress_section_data
*args
1860 = (struct load_progress_section_data
*) untyped_arg
;
1861 struct load_progress_data
*totals
;
1864 /* Writing padding data. No easy way to get at the cumulative
1865 stats, so just ignore this. */
1868 totals
= args
->cumulative
;
1870 if (bytes
== 0 && args
->section_sent
== 0)
1872 /* The write is just starting. Let the user know we've started
1874 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1876 hex_string (args
->section_size
),
1877 paddress (target_gdbarch (), args
->lma
));
1881 if (validate_download
)
1883 /* Broken memories and broken monitors manifest themselves here
1884 when bring new computers to life. This doubles already slow
1886 /* NOTE: cagney/1999-10-18: A more efficient implementation
1887 might add a verify_memory() method to the target vector and
1888 then use that. remote.c could implement that method using
1889 the ``qCRC'' packet. */
1890 gdb::byte_vector
check (bytes
);
1892 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1893 error (_("Download verify read failed at %s"),
1894 paddress (target_gdbarch (), args
->lma
));
1895 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1896 error (_("Download verify compare failed at %s"),
1897 paddress (target_gdbarch (), args
->lma
));
1899 totals
->data_count
+= bytes
;
1901 args
->buffer
+= bytes
;
1902 totals
->write_count
+= 1;
1903 args
->section_sent
+= bytes
;
1904 if (check_quit_flag ()
1905 || (deprecated_ui_load_progress_hook
!= NULL
1906 && deprecated_ui_load_progress_hook (args
->section_name
,
1907 args
->section_sent
)))
1908 error (_("Canceled the download"));
1910 if (deprecated_show_load_progress
!= NULL
)
1911 deprecated_show_load_progress (args
->section_name
,
1915 totals
->total_size
);
1918 /* Callback service function for generic_load (bfd_map_over_sections). */
1921 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1923 struct load_section_data
*args
= (struct load_section_data
*) data
;
1924 bfd_size_type size
= bfd_get_section_size (asec
);
1925 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1927 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1933 ULONGEST begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1934 ULONGEST end
= begin
+ size
;
1935 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (size
);
1936 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1938 load_progress_section_data
*section_data
1939 = new load_progress_section_data (args
->progress_data
, sect_name
, size
,
1942 args
->requests
.emplace_back (begin
, end
, buffer
, section_data
);
1945 static void print_transfer_performance (struct ui_file
*stream
,
1946 unsigned long data_count
,
1947 unsigned long write_count
,
1948 std::chrono::steady_clock::duration d
);
1951 generic_load (const char *args
, int from_tty
)
1953 struct load_progress_data total_progress
;
1954 struct load_section_data
cbdata (&total_progress
);
1955 struct ui_out
*uiout
= current_uiout
;
1958 error_no_arg (_("file to load"));
1960 gdb_argv
argv (args
);
1962 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
1964 if (argv
[1] != NULL
)
1968 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
1970 /* If the last word was not a valid number then
1971 treat it as a file name with spaces in. */
1972 if (argv
[1] == endptr
)
1973 error (_("Invalid download offset:%s."), argv
[1]);
1975 if (argv
[2] != NULL
)
1976 error (_("Too many parameters."));
1979 /* Open the file for loading. */
1980 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
1981 if (loadfile_bfd
== NULL
)
1982 perror_with_name (filename
.get ());
1984 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
1986 error (_("\"%s\" is not an object file: %s"), filename
.get (),
1987 bfd_errmsg (bfd_get_error ()));
1990 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
1991 (void *) &total_progress
.total_size
);
1993 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
1995 using namespace std::chrono
;
1997 steady_clock::time_point start_time
= steady_clock::now ();
1999 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2000 load_progress
) != 0)
2001 error (_("Load failed"));
2003 steady_clock::time_point end_time
= steady_clock::now ();
2005 CORE_ADDR entry
= bfd_get_start_address (loadfile_bfd
.get ());
2006 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2007 uiout
->text ("Start address ");
2008 uiout
->field_fmt ("address", "%s", paddress (target_gdbarch (), entry
));
2009 uiout
->text (", load size ");
2010 uiout
->field_fmt ("load-size", "%lu", total_progress
.data_count
);
2012 regcache_write_pc (get_current_regcache (), entry
);
2014 /* Reset breakpoints, now that we have changed the load image. For
2015 instance, breakpoints may have been set (or reset, by
2016 post_create_inferior) while connected to the target but before we
2017 loaded the program. In that case, the prologue analyzer could
2018 have read instructions from the target to find the right
2019 breakpoint locations. Loading has changed the contents of that
2022 breakpoint_re_set ();
2024 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2025 total_progress
.write_count
,
2026 end_time
- start_time
);
2029 /* Report on STREAM the performance of a memory transfer operation,
2030 such as 'load'. DATA_COUNT is the number of bytes transferred.
2031 WRITE_COUNT is the number of separate write operations, or 0, if
2032 that information is not available. TIME is how long the operation
2036 print_transfer_performance (struct ui_file
*stream
,
2037 unsigned long data_count
,
2038 unsigned long write_count
,
2039 std::chrono::steady_clock::duration time
)
2041 using namespace std::chrono
;
2042 struct ui_out
*uiout
= current_uiout
;
2044 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2046 uiout
->text ("Transfer rate: ");
2047 if (ms
.count () > 0)
2049 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2051 if (uiout
->is_mi_like_p ())
2053 uiout
->field_fmt ("transfer-rate", "%lu", rate
* 8);
2054 uiout
->text (" bits/sec");
2056 else if (rate
< 1024)
2058 uiout
->field_fmt ("transfer-rate", "%lu", rate
);
2059 uiout
->text (" bytes/sec");
2063 uiout
->field_fmt ("transfer-rate", "%lu", rate
/ 1024);
2064 uiout
->text (" KB/sec");
2069 uiout
->field_fmt ("transferred-bits", "%lu", (data_count
* 8));
2070 uiout
->text (" bits in <1 sec");
2072 if (write_count
> 0)
2075 uiout
->field_fmt ("write-rate", "%lu", data_count
/ write_count
);
2076 uiout
->text (" bytes/write");
2078 uiout
->text (".\n");
2081 /* This function allows the addition of incrementally linked object files.
2082 It does not modify any state in the target, only in the debugger. */
2083 /* Note: ezannoni 2000-04-13 This function/command used to have a
2084 special case syntax for the rombug target (Rombug is the boot
2085 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2086 rombug case, the user doesn't need to supply a text address,
2087 instead a call to target_link() (in target.c) would supply the
2088 value to use. We are now discontinuing this type of ad hoc syntax. */
2091 add_symbol_file_command (const char *args
, int from_tty
)
2093 struct gdbarch
*gdbarch
= get_current_arch ();
2094 gdb::unique_xmalloc_ptr
<char> filename
;
2097 struct objfile
*objf
;
2098 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2099 symfile_add_flags add_flags
= 0;
2102 add_flags
|= SYMFILE_VERBOSE
;
2110 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2111 bool stop_processing_options
= false;
2116 error (_("add-symbol-file takes a file name and an address"));
2118 bool seen_addr
= false;
2119 gdb_argv
argv (args
);
2121 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2123 if (stop_processing_options
|| *arg
!= '-')
2125 if (filename
== NULL
)
2127 /* First non-option argument is always the filename. */
2128 filename
.reset (tilde_expand (arg
));
2130 else if (!seen_addr
)
2132 /* The second non-option argument is always the text
2133 address at which to load the program. */
2134 sect_opts
[0].value
= arg
;
2138 error (_("Unrecognized argument \"%s\""), arg
);
2140 else if (strcmp (arg
, "-readnow") == 0)
2141 flags
|= OBJF_READNOW
;
2142 else if (strcmp (arg
, "-readnever") == 0)
2143 flags
|= OBJF_READNEVER
;
2144 else if (strcmp (arg
, "-s") == 0)
2146 if (argv
[argcnt
+ 1] == NULL
)
2147 error (_("Missing section name after \"-s\""));
2148 else if (argv
[argcnt
+ 2] == NULL
)
2149 error (_("Missing section address after \"-s\""));
2151 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2153 sect_opts
.push_back (sect
);
2156 else if (strcmp (arg
, "--") == 0)
2157 stop_processing_options
= true;
2159 error (_("Unrecognized argument \"%s\""), arg
);
2162 if (filename
== NULL
)
2163 error (_("You must provide a filename to be loaded."));
2165 validate_readnow_readnever (flags
);
2167 /* Print the prompt for the query below. And save the arguments into
2168 a sect_addr_info structure to be passed around to other
2169 functions. We have to split this up into separate print
2170 statements because hex_string returns a local static
2173 printf_unfiltered (_("add symbol table from file \"%s\""),
2175 section_addr_info section_addrs
;
2176 std::vector
<sect_opt
>::const_iterator it
= sect_opts
.begin ();
2179 for (; it
!= sect_opts
.end (); ++it
)
2182 const char *val
= it
->value
;
2183 const char *sec
= it
->name
;
2185 if (section_addrs
.empty ())
2186 printf_unfiltered (_(" at\n"));
2187 addr
= parse_and_eval_address (val
);
2189 /* Here we store the section offsets in the order they were
2190 entered on the command line. Every array element is
2191 assigned an ascending section index to preserve the above
2192 order over an unstable sorting algorithm. This dummy
2193 index is not used for any other purpose.
2195 section_addrs
.emplace_back (addr
, sec
, section_addrs
.size ());
2196 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2197 paddress (gdbarch
, addr
));
2199 /* The object's sections are initialized when a
2200 call is made to build_objfile_section_table (objfile).
2201 This happens in reread_symbols.
2202 At this point, we don't know what file type this is,
2203 so we can't determine what section names are valid. */
2205 if (section_addrs
.empty ())
2206 printf_unfiltered ("\n");
2208 if (from_tty
&& (!query ("%s", "")))
2209 error (_("Not confirmed."));
2211 objf
= symbol_file_add (filename
.get (), add_flags
, §ion_addrs
,
2214 add_target_sections_of_objfile (objf
);
2216 /* Getting new symbols may change our opinion about what is
2218 reinit_frame_cache ();
2222 /* This function removes a symbol file that was added via add-symbol-file. */
2225 remove_symbol_file_command (const char *args
, int from_tty
)
2227 struct objfile
*objf
= NULL
;
2228 struct program_space
*pspace
= current_program_space
;
2233 error (_("remove-symbol-file: no symbol file provided"));
2235 gdb_argv
argv (args
);
2237 if (strcmp (argv
[0], "-a") == 0)
2239 /* Interpret the next argument as an address. */
2242 if (argv
[1] == NULL
)
2243 error (_("Missing address argument"));
2245 if (argv
[2] != NULL
)
2246 error (_("Junk after %s"), argv
[1]);
2248 addr
= parse_and_eval_address (argv
[1]);
2252 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2253 && (objf
->flags
& OBJF_SHARED
) != 0
2254 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2258 else if (argv
[0] != NULL
)
2260 /* Interpret the current argument as a file name. */
2262 if (argv
[1] != NULL
)
2263 error (_("Junk after %s"), argv
[0]);
2265 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2269 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2270 && (objf
->flags
& OBJF_SHARED
) != 0
2271 && objf
->pspace
== pspace
2272 && filename_cmp (filename
.get (), objfile_name (objf
)) == 0)
2278 error (_("No symbol file found"));
2281 && !query (_("Remove symbol table from file \"%s\"? "),
2282 objfile_name (objf
)))
2283 error (_("Not confirmed."));
2286 clear_symtab_users (0);
2289 /* Re-read symbols if a symbol-file has changed. */
2292 reread_symbols (void)
2294 struct objfile
*objfile
;
2296 struct stat new_statbuf
;
2298 std::vector
<struct objfile
*> new_objfiles
;
2300 /* With the addition of shared libraries, this should be modified,
2301 the load time should be saved in the partial symbol tables, since
2302 different tables may come from different source files. FIXME.
2303 This routine should then walk down each partial symbol table
2304 and see if the symbol table that it originates from has been changed. */
2306 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2308 if (objfile
->obfd
== NULL
)
2311 /* Separate debug objfiles are handled in the main objfile. */
2312 if (objfile
->separate_debug_objfile_backlink
)
2315 /* If this object is from an archive (what you usually create with
2316 `ar', often called a `static library' on most systems, though
2317 a `shared library' on AIX is also an archive), then you should
2318 stat on the archive name, not member name. */
2319 if (objfile
->obfd
->my_archive
)
2320 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2322 res
= stat (objfile_name (objfile
), &new_statbuf
);
2325 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2326 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2327 objfile_name (objfile
));
2330 new_modtime
= new_statbuf
.st_mtime
;
2331 if (new_modtime
!= objfile
->mtime
)
2333 struct cleanup
*old_cleanups
;
2334 struct section_offsets
*offsets
;
2337 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2338 objfile_name (objfile
));
2340 /* There are various functions like symbol_file_add,
2341 symfile_bfd_open, syms_from_objfile, etc., which might
2342 appear to do what we want. But they have various other
2343 effects which we *don't* want. So we just do stuff
2344 ourselves. We don't worry about mapped files (for one thing,
2345 any mapped file will be out of date). */
2347 /* If we get an error, blow away this objfile (not sure if
2348 that is the correct response for things like shared
2350 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
2352 /* We need to do this whenever any symbols go away. */
2353 old_cleanups
= make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2355 if (exec_bfd
!= NULL
2356 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2357 bfd_get_filename (exec_bfd
)) == 0)
2359 /* Reload EXEC_BFD without asking anything. */
2361 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2364 /* Keep the calls order approx. the same as in free_objfile. */
2366 /* Free the separate debug objfiles. It will be
2367 automatically recreated by sym_read. */
2368 free_objfile_separate_debug (objfile
);
2370 /* Remove any references to this objfile in the global
2372 preserve_values (objfile
);
2374 /* Nuke all the state that we will re-read. Much of the following
2375 code which sets things to NULL really is necessary to tell
2376 other parts of GDB that there is nothing currently there.
2378 Try to keep the freeing order compatible with free_objfile. */
2380 if (objfile
->sf
!= NULL
)
2382 (*objfile
->sf
->sym_finish
) (objfile
);
2385 clear_objfile_data (objfile
);
2387 /* Clean up any state BFD has sitting around. */
2389 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2390 char *obfd_filename
;
2392 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2393 /* Open the new BFD before freeing the old one, so that
2394 the filename remains live. */
2395 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2396 objfile
->obfd
= temp
.release ();
2397 if (objfile
->obfd
== NULL
)
2398 error (_("Can't open %s to read symbols."), obfd_filename
);
2401 std::string original_name
= objfile
->original_name
;
2403 /* bfd_openr sets cacheable to true, which is what we want. */
2404 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2405 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2406 bfd_errmsg (bfd_get_error ()));
2408 /* Save the offsets, we will nuke them with the rest of the
2410 num_offsets
= objfile
->num_sections
;
2411 offsets
= ((struct section_offsets
*)
2412 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2413 memcpy (offsets
, objfile
->section_offsets
,
2414 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2416 /* FIXME: Do we have to free a whole linked list, or is this
2418 objfile
->global_psymbols
.clear ();
2419 objfile
->static_psymbols
.clear ();
2421 /* Free the obstacks for non-reusable objfiles. */
2422 psymbol_bcache_free (objfile
->psymbol_cache
);
2423 objfile
->psymbol_cache
= psymbol_bcache_init ();
2425 /* NB: after this call to obstack_free, objfiles_changed
2426 will need to be called (see discussion below). */
2427 obstack_free (&objfile
->objfile_obstack
, 0);
2428 objfile
->sections
= NULL
;
2429 objfile
->compunit_symtabs
= NULL
;
2430 objfile
->psymtabs
= NULL
;
2431 objfile
->psymtabs_addrmap
= NULL
;
2432 objfile
->free_psymtabs
= NULL
;
2433 objfile
->template_symbols
= NULL
;
2435 /* obstack_init also initializes the obstack so it is
2436 empty. We could use obstack_specify_allocation but
2437 gdb_obstack.h specifies the alloc/dealloc functions. */
2438 obstack_init (&objfile
->objfile_obstack
);
2440 /* set_objfile_per_bfd potentially allocates the per-bfd
2441 data on the objfile's obstack (if sharing data across
2442 multiple users is not possible), so it's important to
2443 do it *after* the obstack has been initialized. */
2444 set_objfile_per_bfd (objfile
);
2446 objfile
->original_name
2447 = (char *) obstack_copy0 (&objfile
->objfile_obstack
,
2448 original_name
.c_str (),
2449 original_name
.size ());
2451 /* Reset the sym_fns pointer. The ELF reader can change it
2452 based on whether .gdb_index is present, and we need it to
2453 start over. PR symtab/15885 */
2454 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2456 build_objfile_section_table (objfile
);
2457 terminate_minimal_symbol_table (objfile
);
2459 /* We use the same section offsets as from last time. I'm not
2460 sure whether that is always correct for shared libraries. */
2461 objfile
->section_offsets
= (struct section_offsets
*)
2462 obstack_alloc (&objfile
->objfile_obstack
,
2463 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2464 memcpy (objfile
->section_offsets
, offsets
,
2465 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2466 objfile
->num_sections
= num_offsets
;
2468 /* What the hell is sym_new_init for, anyway? The concept of
2469 distinguishing between the main file and additional files
2470 in this way seems rather dubious. */
2471 if (objfile
== symfile_objfile
)
2473 (*objfile
->sf
->sym_new_init
) (objfile
);
2476 (*objfile
->sf
->sym_init
) (objfile
);
2477 clear_complaints (1);
2479 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2481 /* We are about to read new symbols and potentially also
2482 DWARF information. Some targets may want to pass addresses
2483 read from DWARF DIE's through an adjustment function before
2484 saving them, like MIPS, which may call into
2485 "find_pc_section". When called, that function will make
2486 use of per-objfile program space data.
2488 Since we discarded our section information above, we have
2489 dangling pointers in the per-objfile program space data
2490 structure. Force GDB to update the section mapping
2491 information by letting it know the objfile has changed,
2492 making the dangling pointers point to correct data
2495 objfiles_changed ();
2497 read_symbols (objfile
, 0);
2499 if (!objfile_has_symbols (objfile
))
2502 printf_unfiltered (_("(no debugging symbols found)\n"));
2506 /* We're done reading the symbol file; finish off complaints. */
2507 clear_complaints (0);
2509 /* Getting new symbols may change our opinion about what is
2512 reinit_frame_cache ();
2514 /* Discard cleanups as symbol reading was successful. */
2515 objfile_holder
.release ();
2516 discard_cleanups (old_cleanups
);
2518 /* If the mtime has changed between the time we set new_modtime
2519 and now, we *want* this to be out of date, so don't call stat
2521 objfile
->mtime
= new_modtime
;
2522 init_entry_point_info (objfile
);
2524 new_objfiles
.push_back (objfile
);
2528 if (!new_objfiles
.empty ())
2530 clear_symtab_users (0);
2532 /* clear_objfile_data for each objfile was called before freeing it and
2533 gdb::observers::new_objfile.notify (NULL) has been called by
2534 clear_symtab_users above. Notify the new files now. */
2535 for (auto iter
: new_objfiles
)
2536 gdb::observers::new_objfile
.notify (objfile
);
2538 /* At least one objfile has changed, so we can consider that
2539 the executable we're debugging has changed too. */
2540 gdb::observers::executable_changed
.notify ();
2545 struct filename_language
2547 filename_language (const std::string
&ext_
, enum language lang_
)
2548 : ext (ext_
), lang (lang_
)
2555 static std::vector
<filename_language
> filename_language_table
;
2557 /* See symfile.h. */
2560 add_filename_language (const char *ext
, enum language lang
)
2562 filename_language_table
.emplace_back (ext
, lang
);
2565 static char *ext_args
;
2567 show_ext_args (struct ui_file
*file
, int from_tty
,
2568 struct cmd_list_element
*c
, const char *value
)
2570 fprintf_filtered (file
,
2571 _("Mapping between filename extension "
2572 "and source language is \"%s\".\n"),
2577 set_ext_lang_command (const char *args
,
2578 int from_tty
, struct cmd_list_element
*e
)
2580 char *cp
= ext_args
;
2583 /* First arg is filename extension, starting with '.' */
2585 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2587 /* Find end of first arg. */
2588 while (*cp
&& !isspace (*cp
))
2592 error (_("'%s': two arguments required -- "
2593 "filename extension and language"),
2596 /* Null-terminate first arg. */
2599 /* Find beginning of second arg, which should be a source language. */
2600 cp
= skip_spaces (cp
);
2603 error (_("'%s': two arguments required -- "
2604 "filename extension and language"),
2607 /* Lookup the language from among those we know. */
2608 lang
= language_enum (cp
);
2610 auto it
= filename_language_table
.begin ();
2611 /* Now lookup the filename extension: do we already know it? */
2612 for (; it
!= filename_language_table
.end (); it
++)
2614 if (it
->ext
== ext_args
)
2618 if (it
== filename_language_table
.end ())
2620 /* New file extension. */
2621 add_filename_language (ext_args
, lang
);
2625 /* Redefining a previously known filename extension. */
2628 /* query ("Really make files of type %s '%s'?", */
2629 /* ext_args, language_str (lang)); */
2636 info_ext_lang_command (const char *args
, int from_tty
)
2638 printf_filtered (_("Filename extensions and the languages they represent:"));
2639 printf_filtered ("\n\n");
2640 for (const filename_language
&entry
: filename_language_table
)
2641 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2642 language_str (entry
.lang
));
2646 deduce_language_from_filename (const char *filename
)
2650 if (filename
!= NULL
)
2651 if ((cp
= strrchr (filename
, '.')) != NULL
)
2653 for (const filename_language
&entry
: filename_language_table
)
2654 if (entry
.ext
== cp
)
2658 return language_unknown
;
2661 /* Allocate and initialize a new symbol table.
2662 CUST is from the result of allocate_compunit_symtab. */
2665 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2667 struct objfile
*objfile
= cust
->objfile
;
2668 struct symtab
*symtab
2669 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2672 = (const char *) bcache (filename
, strlen (filename
) + 1,
2673 objfile
->per_bfd
->filename_cache
);
2674 symtab
->fullname
= NULL
;
2675 symtab
->language
= deduce_language_from_filename (filename
);
2677 /* This can be very verbose with lots of headers.
2678 Only print at higher debug levels. */
2679 if (symtab_create_debug
>= 2)
2681 /* Be a bit clever with debugging messages, and don't print objfile
2682 every time, only when it changes. */
2683 static char *last_objfile_name
= NULL
;
2685 if (last_objfile_name
== NULL
2686 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2688 xfree (last_objfile_name
);
2689 last_objfile_name
= xstrdup (objfile_name (objfile
));
2690 fprintf_unfiltered (gdb_stdlog
,
2691 "Creating one or more symtabs for objfile %s ...\n",
2694 fprintf_unfiltered (gdb_stdlog
,
2695 "Created symtab %s for module %s.\n",
2696 host_address_to_string (symtab
), filename
);
2699 /* Add it to CUST's list of symtabs. */
2700 if (cust
->filetabs
== NULL
)
2702 cust
->filetabs
= symtab
;
2703 cust
->last_filetab
= symtab
;
2707 cust
->last_filetab
->next
= symtab
;
2708 cust
->last_filetab
= symtab
;
2711 /* Backlink to the containing compunit symtab. */
2712 symtab
->compunit_symtab
= cust
;
2717 /* Allocate and initialize a new compunit.
2718 NAME is the name of the main source file, if there is one, or some
2719 descriptive text if there are no source files. */
2721 struct compunit_symtab
*
2722 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2724 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2725 struct compunit_symtab
);
2726 const char *saved_name
;
2728 cu
->objfile
= objfile
;
2730 /* The name we record here is only for display/debugging purposes.
2731 Just save the basename to avoid path issues (too long for display,
2732 relative vs absolute, etc.). */
2733 saved_name
= lbasename (name
);
2735 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2736 strlen (saved_name
));
2738 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2740 if (symtab_create_debug
)
2742 fprintf_unfiltered (gdb_stdlog
,
2743 "Created compunit symtab %s for %s.\n",
2744 host_address_to_string (cu
),
2751 /* Hook CU to the objfile it comes from. */
2754 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2756 cu
->next
= cu
->objfile
->compunit_symtabs
;
2757 cu
->objfile
->compunit_symtabs
= cu
;
2761 /* Reset all data structures in gdb which may contain references to
2762 symbol table data. */
2765 clear_symtab_users (symfile_add_flags add_flags
)
2767 /* Someday, we should do better than this, by only blowing away
2768 the things that really need to be blown. */
2770 /* Clear the "current" symtab first, because it is no longer valid.
2771 breakpoint_re_set may try to access the current symtab. */
2772 clear_current_source_symtab_and_line ();
2775 clear_last_displayed_sal ();
2776 clear_pc_function_cache ();
2777 gdb::observers::new_objfile
.notify (NULL
);
2779 /* Clear globals which might have pointed into a removed objfile.
2780 FIXME: It's not clear which of these are supposed to persist
2781 between expressions and which ought to be reset each time. */
2782 expression_context_block
= NULL
;
2783 innermost_block
.reset ();
2785 /* Varobj may refer to old symbols, perform a cleanup. */
2786 varobj_invalidate ();
2788 /* Now that the various caches have been cleared, we can re_set
2789 our breakpoints without risking it using stale data. */
2790 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2791 breakpoint_re_set ();
2795 clear_symtab_users_cleanup (void *ignore
)
2797 clear_symtab_users (0);
2801 The following code implements an abstraction for debugging overlay sections.
2803 The target model is as follows:
2804 1) The gnu linker will permit multiple sections to be mapped into the
2805 same VMA, each with its own unique LMA (or load address).
2806 2) It is assumed that some runtime mechanism exists for mapping the
2807 sections, one by one, from the load address into the VMA address.
2808 3) This code provides a mechanism for gdb to keep track of which
2809 sections should be considered to be mapped from the VMA to the LMA.
2810 This information is used for symbol lookup, and memory read/write.
2811 For instance, if a section has been mapped then its contents
2812 should be read from the VMA, otherwise from the LMA.
2814 Two levels of debugger support for overlays are available. One is
2815 "manual", in which the debugger relies on the user to tell it which
2816 overlays are currently mapped. This level of support is
2817 implemented entirely in the core debugger, and the information about
2818 whether a section is mapped is kept in the objfile->obj_section table.
2820 The second level of support is "automatic", and is only available if
2821 the target-specific code provides functionality to read the target's
2822 overlay mapping table, and translate its contents for the debugger
2823 (by updating the mapped state information in the obj_section tables).
2825 The interface is as follows:
2827 overlay map <name> -- tell gdb to consider this section mapped
2828 overlay unmap <name> -- tell gdb to consider this section unmapped
2829 overlay list -- list the sections that GDB thinks are mapped
2830 overlay read-target -- get the target's state of what's mapped
2831 overlay off/manual/auto -- set overlay debugging state
2832 Functional interface:
2833 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2834 section, return that section.
2835 find_pc_overlay(pc): find any overlay section that contains
2836 the pc, either in its VMA or its LMA
2837 section_is_mapped(sect): true if overlay is marked as mapped
2838 section_is_overlay(sect): true if section's VMA != LMA
2839 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2840 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2841 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2842 overlay_mapped_address(...): map an address from section's LMA to VMA
2843 overlay_unmapped_address(...): map an address from section's VMA to LMA
2844 symbol_overlayed_address(...): Return a "current" address for symbol:
2845 either in VMA or LMA depending on whether
2846 the symbol's section is currently mapped. */
2848 /* Overlay debugging state: */
2850 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2851 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2853 /* Function: section_is_overlay (SECTION)
2854 Returns true if SECTION has VMA not equal to LMA, ie.
2855 SECTION is loaded at an address different from where it will "run". */
2858 section_is_overlay (struct obj_section
*section
)
2860 if (overlay_debugging
&& section
)
2862 asection
*bfd_section
= section
->the_bfd_section
;
2864 if (bfd_section_lma (abfd
, bfd_section
) != 0
2865 && bfd_section_lma (abfd
, bfd_section
)
2866 != bfd_section_vma (abfd
, bfd_section
))
2873 /* Function: overlay_invalidate_all (void)
2874 Invalidate the mapped state of all overlay sections (mark it as stale). */
2877 overlay_invalidate_all (void)
2879 struct objfile
*objfile
;
2880 struct obj_section
*sect
;
2882 ALL_OBJSECTIONS (objfile
, sect
)
2883 if (section_is_overlay (sect
))
2884 sect
->ovly_mapped
= -1;
2887 /* Function: section_is_mapped (SECTION)
2888 Returns true if section is an overlay, and is currently mapped.
2890 Access to the ovly_mapped flag is restricted to this function, so
2891 that we can do automatic update. If the global flag
2892 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2893 overlay_invalidate_all. If the mapped state of the particular
2894 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2897 section_is_mapped (struct obj_section
*osect
)
2899 struct gdbarch
*gdbarch
;
2901 if (osect
== 0 || !section_is_overlay (osect
))
2904 switch (overlay_debugging
)
2908 return 0; /* overlay debugging off */
2909 case ovly_auto
: /* overlay debugging automatic */
2910 /* Unles there is a gdbarch_overlay_update function,
2911 there's really nothing useful to do here (can't really go auto). */
2912 gdbarch
= get_objfile_arch (osect
->objfile
);
2913 if (gdbarch_overlay_update_p (gdbarch
))
2915 if (overlay_cache_invalid
)
2917 overlay_invalidate_all ();
2918 overlay_cache_invalid
= 0;
2920 if (osect
->ovly_mapped
== -1)
2921 gdbarch_overlay_update (gdbarch
, osect
);
2924 case ovly_on
: /* overlay debugging manual */
2925 return osect
->ovly_mapped
== 1;
2929 /* Function: pc_in_unmapped_range
2930 If PC falls into the lma range of SECTION, return true, else false. */
2933 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2935 if (section_is_overlay (section
))
2937 bfd
*abfd
= section
->objfile
->obfd
;
2938 asection
*bfd_section
= section
->the_bfd_section
;
2940 /* We assume the LMA is relocated by the same offset as the VMA. */
2941 bfd_vma size
= bfd_get_section_size (bfd_section
);
2942 CORE_ADDR offset
= obj_section_offset (section
);
2944 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
2945 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
2952 /* Function: pc_in_mapped_range
2953 If PC falls into the vma range of SECTION, return true, else false. */
2956 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2958 if (section_is_overlay (section
))
2960 if (obj_section_addr (section
) <= pc
2961 && pc
< obj_section_endaddr (section
))
2968 /* Return true if the mapped ranges of sections A and B overlap, false
2972 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
2974 CORE_ADDR a_start
= obj_section_addr (a
);
2975 CORE_ADDR a_end
= obj_section_endaddr (a
);
2976 CORE_ADDR b_start
= obj_section_addr (b
);
2977 CORE_ADDR b_end
= obj_section_endaddr (b
);
2979 return (a_start
< b_end
&& b_start
< a_end
);
2982 /* Function: overlay_unmapped_address (PC, SECTION)
2983 Returns the address corresponding to PC in the unmapped (load) range.
2984 May be the same as PC. */
2987 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
2989 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
2991 asection
*bfd_section
= section
->the_bfd_section
;
2993 return pc
+ bfd_section_lma (abfd
, bfd_section
)
2994 - bfd_section_vma (abfd
, bfd_section
);
3000 /* Function: overlay_mapped_address (PC, SECTION)
3001 Returns the address corresponding to PC in the mapped (runtime) range.
3002 May be the same as PC. */
3005 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3007 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3009 asection
*bfd_section
= section
->the_bfd_section
;
3011 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3012 - bfd_section_lma (abfd
, bfd_section
);
3018 /* Function: symbol_overlayed_address
3019 Return one of two addresses (relative to the VMA or to the LMA),
3020 depending on whether the section is mapped or not. */
3023 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3025 if (overlay_debugging
)
3027 /* If the symbol has no section, just return its regular address. */
3030 /* If the symbol's section is not an overlay, just return its
3032 if (!section_is_overlay (section
))
3034 /* If the symbol's section is mapped, just return its address. */
3035 if (section_is_mapped (section
))
3038 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3039 * then return its LOADED address rather than its vma address!!
3041 return overlay_unmapped_address (address
, section
);
3046 /* Function: find_pc_overlay (PC)
3047 Return the best-match overlay section for PC:
3048 If PC matches a mapped overlay section's VMA, return that section.
3049 Else if PC matches an unmapped section's VMA, return that section.
3050 Else if PC matches an unmapped section's LMA, return that section. */
3052 struct obj_section
*
3053 find_pc_overlay (CORE_ADDR pc
)
3055 struct objfile
*objfile
;
3056 struct obj_section
*osect
, *best_match
= NULL
;
3058 if (overlay_debugging
)
3060 ALL_OBJSECTIONS (objfile
, osect
)
3061 if (section_is_overlay (osect
))
3063 if (pc_in_mapped_range (pc
, osect
))
3065 if (section_is_mapped (osect
))
3070 else if (pc_in_unmapped_range (pc
, osect
))
3077 /* Function: find_pc_mapped_section (PC)
3078 If PC falls into the VMA address range of an overlay section that is
3079 currently marked as MAPPED, return that section. Else return NULL. */
3081 struct obj_section
*
3082 find_pc_mapped_section (CORE_ADDR pc
)
3084 struct objfile
*objfile
;
3085 struct obj_section
*osect
;
3087 if (overlay_debugging
)
3089 ALL_OBJSECTIONS (objfile
, osect
)
3090 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3097 /* Function: list_overlays_command
3098 Print a list of mapped sections and their PC ranges. */
3101 list_overlays_command (const char *args
, int from_tty
)
3104 struct objfile
*objfile
;
3105 struct obj_section
*osect
;
3107 if (overlay_debugging
)
3109 ALL_OBJSECTIONS (objfile
, osect
)
3110 if (section_is_mapped (osect
))
3112 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3117 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3118 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3119 size
= bfd_get_section_size (osect
->the_bfd_section
);
3120 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3122 printf_filtered ("Section %s, loaded at ", name
);
3123 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3124 puts_filtered (" - ");
3125 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3126 printf_filtered (", mapped at ");
3127 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3128 puts_filtered (" - ");
3129 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3130 puts_filtered ("\n");
3136 printf_filtered (_("No sections are mapped.\n"));
3139 /* Function: map_overlay_command
3140 Mark the named section as mapped (ie. residing at its VMA address). */
3143 map_overlay_command (const char *args
, int from_tty
)
3145 struct objfile
*objfile
, *objfile2
;
3146 struct obj_section
*sec
, *sec2
;
3148 if (!overlay_debugging
)
3149 error (_("Overlay debugging not enabled. Use "
3150 "either the 'overlay auto' or\n"
3151 "the 'overlay manual' command."));
3153 if (args
== 0 || *args
== 0)
3154 error (_("Argument required: name of an overlay section"));
3156 /* First, find a section matching the user supplied argument. */
3157 ALL_OBJSECTIONS (objfile
, sec
)
3158 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3160 /* Now, check to see if the section is an overlay. */
3161 if (!section_is_overlay (sec
))
3162 continue; /* not an overlay section */
3164 /* Mark the overlay as "mapped". */
3165 sec
->ovly_mapped
= 1;
3167 /* Next, make a pass and unmap any sections that are
3168 overlapped by this new section: */
3169 ALL_OBJSECTIONS (objfile2
, sec2
)
3170 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3173 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3174 bfd_section_name (objfile
->obfd
,
3175 sec2
->the_bfd_section
));
3176 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3180 error (_("No overlay section called %s"), args
);
3183 /* Function: unmap_overlay_command
3184 Mark the overlay section as unmapped
3185 (ie. resident in its LMA address range, rather than the VMA range). */
3188 unmap_overlay_command (const char *args
, int from_tty
)
3190 struct objfile
*objfile
;
3191 struct obj_section
*sec
= NULL
;
3193 if (!overlay_debugging
)
3194 error (_("Overlay debugging not enabled. "
3195 "Use either the 'overlay auto' or\n"
3196 "the 'overlay manual' command."));
3198 if (args
== 0 || *args
== 0)
3199 error (_("Argument required: name of an overlay section"));
3201 /* First, find a section matching the user supplied argument. */
3202 ALL_OBJSECTIONS (objfile
, sec
)
3203 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3205 if (!sec
->ovly_mapped
)
3206 error (_("Section %s is not mapped"), args
);
3207 sec
->ovly_mapped
= 0;
3210 error (_("No overlay section called %s"), args
);
3213 /* Function: overlay_auto_command
3214 A utility command to turn on overlay debugging.
3215 Possibly this should be done via a set/show command. */
3218 overlay_auto_command (const char *args
, int from_tty
)
3220 overlay_debugging
= ovly_auto
;
3221 enable_overlay_breakpoints ();
3223 printf_unfiltered (_("Automatic overlay debugging enabled."));
3226 /* Function: overlay_manual_command
3227 A utility command to turn on overlay debugging.
3228 Possibly this should be done via a set/show command. */
3231 overlay_manual_command (const char *args
, int from_tty
)
3233 overlay_debugging
= ovly_on
;
3234 disable_overlay_breakpoints ();
3236 printf_unfiltered (_("Overlay debugging enabled."));
3239 /* Function: overlay_off_command
3240 A utility command to turn on overlay debugging.
3241 Possibly this should be done via a set/show command. */
3244 overlay_off_command (const char *args
, int from_tty
)
3246 overlay_debugging
= ovly_off
;
3247 disable_overlay_breakpoints ();
3249 printf_unfiltered (_("Overlay debugging disabled."));
3253 overlay_load_command (const char *args
, int from_tty
)
3255 struct gdbarch
*gdbarch
= get_current_arch ();
3257 if (gdbarch_overlay_update_p (gdbarch
))
3258 gdbarch_overlay_update (gdbarch
, NULL
);
3260 error (_("This target does not know how to read its overlay state."));
3263 /* Function: overlay_command
3264 A place-holder for a mis-typed command. */
3266 /* Command list chain containing all defined "overlay" subcommands. */
3267 static struct cmd_list_element
*overlaylist
;
3270 overlay_command (const char *args
, int from_tty
)
3273 ("\"overlay\" must be followed by the name of an overlay command.\n");
3274 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3277 /* Target Overlays for the "Simplest" overlay manager:
3279 This is GDB's default target overlay layer. It works with the
3280 minimal overlay manager supplied as an example by Cygnus. The
3281 entry point is via a function pointer "gdbarch_overlay_update",
3282 so targets that use a different runtime overlay manager can
3283 substitute their own overlay_update function and take over the
3286 The overlay_update function pokes around in the target's data structures
3287 to see what overlays are mapped, and updates GDB's overlay mapping with
3290 In this simple implementation, the target data structures are as follows:
3291 unsigned _novlys; /# number of overlay sections #/
3292 unsigned _ovly_table[_novlys][4] = {
3293 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3294 {..., ..., ..., ...},
3296 unsigned _novly_regions; /# number of overlay regions #/
3297 unsigned _ovly_region_table[_novly_regions][3] = {
3298 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3301 These functions will attempt to update GDB's mappedness state in the
3302 symbol section table, based on the target's mappedness state.
3304 To do this, we keep a cached copy of the target's _ovly_table, and
3305 attempt to detect when the cached copy is invalidated. The main
3306 entry point is "simple_overlay_update(SECT), which looks up SECT in
3307 the cached table and re-reads only the entry for that section from
3308 the target (whenever possible). */
3310 /* Cached, dynamically allocated copies of the target data structures: */
3311 static unsigned (*cache_ovly_table
)[4] = 0;
3312 static unsigned cache_novlys
= 0;
3313 static CORE_ADDR cache_ovly_table_base
= 0;
3316 VMA
, OSIZE
, LMA
, MAPPED
3319 /* Throw away the cached copy of _ovly_table. */
3322 simple_free_overlay_table (void)
3324 if (cache_ovly_table
)
3325 xfree (cache_ovly_table
);
3327 cache_ovly_table
= NULL
;
3328 cache_ovly_table_base
= 0;
3331 /* Read an array of ints of size SIZE from the target into a local buffer.
3332 Convert to host order. int LEN is number of ints. */
3335 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3336 int len
, int size
, enum bfd_endian byte_order
)
3338 /* FIXME (alloca): Not safe if array is very large. */
3339 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3342 read_memory (memaddr
, buf
, len
* size
);
3343 for (i
= 0; i
< len
; i
++)
3344 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3347 /* Find and grab a copy of the target _ovly_table
3348 (and _novlys, which is needed for the table's size). */
3351 simple_read_overlay_table (void)
3353 struct bound_minimal_symbol novlys_msym
;
3354 struct bound_minimal_symbol ovly_table_msym
;
3355 struct gdbarch
*gdbarch
;
3357 enum bfd_endian byte_order
;
3359 simple_free_overlay_table ();
3360 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3361 if (! novlys_msym
.minsym
)
3363 error (_("Error reading inferior's overlay table: "
3364 "couldn't find `_novlys' variable\n"
3365 "in inferior. Use `overlay manual' mode."));
3369 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3370 if (! ovly_table_msym
.minsym
)
3372 error (_("Error reading inferior's overlay table: couldn't find "
3373 "`_ovly_table' array\n"
3374 "in inferior. Use `overlay manual' mode."));
3378 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3379 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3380 byte_order
= gdbarch_byte_order (gdbarch
);
3382 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3385 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3386 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3387 read_target_long_array (cache_ovly_table_base
,
3388 (unsigned int *) cache_ovly_table
,
3389 cache_novlys
* 4, word_size
, byte_order
);
3391 return 1; /* SUCCESS */
3394 /* Function: simple_overlay_update_1
3395 A helper function for simple_overlay_update. Assuming a cached copy
3396 of _ovly_table exists, look through it to find an entry whose vma,
3397 lma and size match those of OSECT. Re-read the entry and make sure
3398 it still matches OSECT (else the table may no longer be valid).
3399 Set OSECT's mapped state to match the entry. Return: 1 for
3400 success, 0 for failure. */
3403 simple_overlay_update_1 (struct obj_section
*osect
)
3406 asection
*bsect
= osect
->the_bfd_section
;
3407 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3408 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3409 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3411 for (i
= 0; i
< cache_novlys
; i
++)
3412 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3413 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3415 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3416 (unsigned int *) cache_ovly_table
[i
],
3417 4, word_size
, byte_order
);
3418 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3419 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3421 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3424 else /* Warning! Warning! Target's ovly table has changed! */
3430 /* Function: simple_overlay_update
3431 If OSECT is NULL, then update all sections' mapped state
3432 (after re-reading the entire target _ovly_table).
3433 If OSECT is non-NULL, then try to find a matching entry in the
3434 cached ovly_table and update only OSECT's mapped state.
3435 If a cached entry can't be found or the cache isn't valid, then
3436 re-read the entire cache, and go ahead and update all sections. */
3439 simple_overlay_update (struct obj_section
*osect
)
3441 struct objfile
*objfile
;
3443 /* Were we given an osect to look up? NULL means do all of them. */
3445 /* Have we got a cached copy of the target's overlay table? */
3446 if (cache_ovly_table
!= NULL
)
3448 /* Does its cached location match what's currently in the
3450 struct bound_minimal_symbol minsym
3451 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3453 if (minsym
.minsym
== NULL
)
3454 error (_("Error reading inferior's overlay table: couldn't "
3455 "find `_ovly_table' array\n"
3456 "in inferior. Use `overlay manual' mode."));
3458 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3459 /* Then go ahead and try to look up this single section in
3461 if (simple_overlay_update_1 (osect
))
3462 /* Found it! We're done. */
3466 /* Cached table no good: need to read the entire table anew.
3467 Or else we want all the sections, in which case it's actually
3468 more efficient to read the whole table in one block anyway. */
3470 if (! simple_read_overlay_table ())
3473 /* Now may as well update all sections, even if only one was requested. */
3474 ALL_OBJSECTIONS (objfile
, osect
)
3475 if (section_is_overlay (osect
))
3478 asection
*bsect
= osect
->the_bfd_section
;
3480 for (i
= 0; i
< cache_novlys
; i
++)
3481 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3482 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3483 { /* obj_section matches i'th entry in ovly_table. */
3484 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3485 break; /* finished with inner for loop: break out. */
3490 /* Set the output sections and output offsets for section SECTP in
3491 ABFD. The relocation code in BFD will read these offsets, so we
3492 need to be sure they're initialized. We map each section to itself,
3493 with no offset; this means that SECTP->vma will be honored. */
3496 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3498 sectp
->output_section
= sectp
;
3499 sectp
->output_offset
= 0;
3502 /* Default implementation for sym_relocate. */
3505 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3508 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3510 bfd
*abfd
= sectp
->owner
;
3512 /* We're only interested in sections with relocation
3514 if ((sectp
->flags
& SEC_RELOC
) == 0)
3517 /* We will handle section offsets properly elsewhere, so relocate as if
3518 all sections begin at 0. */
3519 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3521 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3524 /* Relocate the contents of a debug section SECTP in ABFD. The
3525 contents are stored in BUF if it is non-NULL, or returned in a
3526 malloc'd buffer otherwise.
3528 For some platforms and debug info formats, shared libraries contain
3529 relocations against the debug sections (particularly for DWARF-2;
3530 one affected platform is PowerPC GNU/Linux, although it depends on
3531 the version of the linker in use). Also, ELF object files naturally
3532 have unresolved relocations for their debug sections. We need to apply
3533 the relocations in order to get the locations of symbols correct.
3534 Another example that may require relocation processing, is the
3535 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3539 symfile_relocate_debug_section (struct objfile
*objfile
,
3540 asection
*sectp
, bfd_byte
*buf
)
3542 gdb_assert (objfile
->sf
->sym_relocate
);
3544 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3547 struct symfile_segment_data
*
3548 get_symfile_segment_data (bfd
*abfd
)
3550 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3555 return sf
->sym_segments (abfd
);
3559 free_symfile_segment_data (struct symfile_segment_data
*data
)
3561 xfree (data
->segment_bases
);
3562 xfree (data
->segment_sizes
);
3563 xfree (data
->segment_info
);
3568 - DATA, containing segment addresses from the object file ABFD, and
3569 the mapping from ABFD's sections onto the segments that own them,
3571 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3572 segment addresses reported by the target,
3573 store the appropriate offsets for each section in OFFSETS.
3575 If there are fewer entries in SEGMENT_BASES than there are segments
3576 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3578 If there are more entries, then ignore the extra. The target may
3579 not be able to distinguish between an empty data segment and a
3580 missing data segment; a missing text segment is less plausible. */
3583 symfile_map_offsets_to_segments (bfd
*abfd
,
3584 const struct symfile_segment_data
*data
,
3585 struct section_offsets
*offsets
,
3586 int num_segment_bases
,
3587 const CORE_ADDR
*segment_bases
)
3592 /* It doesn't make sense to call this function unless you have some
3593 segment base addresses. */
3594 gdb_assert (num_segment_bases
> 0);
3596 /* If we do not have segment mappings for the object file, we
3597 can not relocate it by segments. */
3598 gdb_assert (data
!= NULL
);
3599 gdb_assert (data
->num_segments
> 0);
3601 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3603 int which
= data
->segment_info
[i
];
3605 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3607 /* Don't bother computing offsets for sections that aren't
3608 loaded as part of any segment. */
3612 /* Use the last SEGMENT_BASES entry as the address of any extra
3613 segments mentioned in DATA->segment_info. */
3614 if (which
> num_segment_bases
)
3615 which
= num_segment_bases
;
3617 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3618 - data
->segment_bases
[which
- 1]);
3625 symfile_find_segment_sections (struct objfile
*objfile
)
3627 bfd
*abfd
= objfile
->obfd
;
3630 struct symfile_segment_data
*data
;
3632 data
= get_symfile_segment_data (objfile
->obfd
);
3636 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3638 free_symfile_segment_data (data
);
3642 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3644 int which
= data
->segment_info
[i
];
3648 if (objfile
->sect_index_text
== -1)
3649 objfile
->sect_index_text
= sect
->index
;
3651 if (objfile
->sect_index_rodata
== -1)
3652 objfile
->sect_index_rodata
= sect
->index
;
3654 else if (which
== 2)
3656 if (objfile
->sect_index_data
== -1)
3657 objfile
->sect_index_data
= sect
->index
;
3659 if (objfile
->sect_index_bss
== -1)
3660 objfile
->sect_index_bss
= sect
->index
;
3664 free_symfile_segment_data (data
);
3667 /* Listen for free_objfile events. */
3670 symfile_free_objfile (struct objfile
*objfile
)
3672 /* Remove the target sections owned by this objfile. */
3673 if (objfile
!= NULL
)
3674 remove_target_sections ((void *) objfile
);
3677 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3678 Expand all symtabs that match the specified criteria.
3679 See quick_symbol_functions.expand_symtabs_matching for details. */
3682 expand_symtabs_matching
3683 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3684 const lookup_name_info
&lookup_name
,
3685 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3686 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3687 enum search_domain kind
)
3689 struct objfile
*objfile
;
3691 ALL_OBJFILES (objfile
)
3694 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3697 expansion_notify
, kind
);
3701 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3702 Map function FUN over every file.
3703 See quick_symbol_functions.map_symbol_filenames for details. */
3706 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3709 struct objfile
*objfile
;
3711 ALL_OBJFILES (objfile
)
3714 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3721 namespace selftests
{
3722 namespace filename_language
{
3724 static void test_filename_language ()
3726 /* This test messes up the filename_language_table global. */
3727 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3729 /* Test deducing an unknown extension. */
3730 language lang
= deduce_language_from_filename ("myfile.blah");
3731 SELF_CHECK (lang
== language_unknown
);
3733 /* Test deducing a known extension. */
3734 lang
= deduce_language_from_filename ("myfile.c");
3735 SELF_CHECK (lang
== language_c
);
3737 /* Test adding a new extension using the internal API. */
3738 add_filename_language (".blah", language_pascal
);
3739 lang
= deduce_language_from_filename ("myfile.blah");
3740 SELF_CHECK (lang
== language_pascal
);
3744 test_set_ext_lang_command ()
3746 /* This test messes up the filename_language_table global. */
3747 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3749 /* Confirm that the .hello extension is not known. */
3750 language lang
= deduce_language_from_filename ("cake.hello");
3751 SELF_CHECK (lang
== language_unknown
);
3753 /* Test adding a new extension using the CLI command. */
3754 gdb::unique_xmalloc_ptr
<char> args_holder (xstrdup (".hello rust"));
3755 ext_args
= args_holder
.get ();
3756 set_ext_lang_command (NULL
, 1, NULL
);
3758 lang
= deduce_language_from_filename ("cake.hello");
3759 SELF_CHECK (lang
== language_rust
);
3761 /* Test overriding an existing extension using the CLI command. */
3762 int size_before
= filename_language_table
.size ();
3763 args_holder
.reset (xstrdup (".hello pascal"));
3764 ext_args
= args_holder
.get ();
3765 set_ext_lang_command (NULL
, 1, NULL
);
3766 int size_after
= filename_language_table
.size ();
3768 lang
= deduce_language_from_filename ("cake.hello");
3769 SELF_CHECK (lang
== language_pascal
);
3770 SELF_CHECK (size_before
== size_after
);
3773 } /* namespace filename_language */
3774 } /* namespace selftests */
3776 #endif /* GDB_SELF_TEST */
3779 _initialize_symfile (void)
3781 struct cmd_list_element
*c
;
3783 gdb::observers::free_objfile
.attach (symfile_free_objfile
);
3785 #define READNOW_READNEVER_HELP \
3786 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3787 immediately. This makes the command slower, but may make future operations\n\
3789 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3790 symbolic debug information."
3792 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3793 Load symbol table from executable file FILE.\n\
3794 Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
3795 OFF is an optional offset which is added to each section address.\n\
3796 The `file' command can also load symbol tables, as well as setting the file\n\
3797 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3798 set_cmd_completer (c
, filename_completer
);
3800 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3801 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3802 Usage: add-symbol-file FILE [-readnow | -readnever] [ADDR] \
3803 [-s SECT-NAME SECT-ADDR]...\n\
3804 ADDR is the starting address of the file's text.\n\
3805 Each '-s' argument provides a section name and address, and\n\
3806 should be specified if the data and bss segments are not contiguous\n\
3807 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n"
3808 READNOW_READNEVER_HELP
),
3810 set_cmd_completer (c
, filename_completer
);
3812 c
= add_cmd ("remove-symbol-file", class_files
,
3813 remove_symbol_file_command
, _("\
3814 Remove a symbol file added via the add-symbol-file command.\n\
3815 Usage: remove-symbol-file FILENAME\n\
3816 remove-symbol-file -a ADDRESS\n\
3817 The file to remove can be identified by its filename or by an address\n\
3818 that lies within the boundaries of this symbol file in memory."),
3821 c
= add_cmd ("load", class_files
, load_command
, _("\
3822 Dynamically load FILE into the running program, and record its symbols\n\
3823 for access from GDB.\n\
3824 Usage: load [FILE] [OFFSET]\n\
3825 An optional load OFFSET may also be given as a literal address.\n\
3826 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3827 on its own."), &cmdlist
);
3828 set_cmd_completer (c
, filename_completer
);
3830 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3831 _("Commands for debugging overlays."), &overlaylist
,
3832 "overlay ", 0, &cmdlist
);
3834 add_com_alias ("ovly", "overlay", class_alias
, 1);
3835 add_com_alias ("ov", "overlay", class_alias
, 1);
3837 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3838 _("Assert that an overlay section is mapped."), &overlaylist
);
3840 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3841 _("Assert that an overlay section is unmapped."), &overlaylist
);
3843 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3844 _("List mappings of overlay sections."), &overlaylist
);
3846 add_cmd ("manual", class_support
, overlay_manual_command
,
3847 _("Enable overlay debugging."), &overlaylist
);
3848 add_cmd ("off", class_support
, overlay_off_command
,
3849 _("Disable overlay debugging."), &overlaylist
);
3850 add_cmd ("auto", class_support
, overlay_auto_command
,
3851 _("Enable automatic overlay debugging."), &overlaylist
);
3852 add_cmd ("load-target", class_support
, overlay_load_command
,
3853 _("Read the overlay mapping state from the target."), &overlaylist
);
3855 /* Filename extension to source language lookup table: */
3856 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3858 Set mapping between filename extension and source language."), _("\
3859 Show mapping between filename extension and source language."), _("\
3860 Usage: set extension-language .foo bar"),
3861 set_ext_lang_command
,
3863 &setlist
, &showlist
);
3865 add_info ("extensions", info_ext_lang_command
,
3866 _("All filename extensions associated with a source language."));
3868 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3869 &debug_file_directory
, _("\
3870 Set the directories where separate debug symbols are searched for."), _("\
3871 Show the directories where separate debug symbols are searched for."), _("\
3872 Separate debug symbols are first searched for in the same\n\
3873 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3874 and lastly at the path of the directory of the binary with\n\
3875 each global debug-file-directory component prepended."),
3877 show_debug_file_directory
,
3878 &setlist
, &showlist
);
3880 add_setshow_enum_cmd ("symbol-loading", no_class
,
3881 print_symbol_loading_enums
, &print_symbol_loading
,
3883 Set printing of symbol loading messages."), _("\
3884 Show printing of symbol loading messages."), _("\
3885 off == turn all messages off\n\
3886 brief == print messages for the executable,\n\
3887 and brief messages for shared libraries\n\
3888 full == print messages for the executable,\n\
3889 and messages for each shared library."),
3892 &setprintlist
, &showprintlist
);
3894 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3895 &separate_debug_file_debug
, _("\
3896 Set printing of separate debug info file search debug."), _("\
3897 Show printing of separate debug info file search debug."), _("\
3898 When on, GDB prints the searched locations while looking for separate debug \
3899 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
3902 selftests::register_test
3903 ("filename_language", selftests::filename_language::test_filename_language
);
3904 selftests::register_test
3905 ("set_ext_lang_command",
3906 selftests::filename_language::test_set_ext_lang_command
);