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'.
912 ADD_FLAGS encodes verbosity level, whether this is main symbol or
913 an extra symbol file such as dynamically loaded code, and wether
914 breakpoint reset should be deferred. */
917 syms_from_objfile_1 (struct objfile
*objfile
,
918 section_addr_info
*addrs
,
919 symfile_add_flags add_flags
)
921 section_addr_info local_addr
;
922 struct cleanup
*old_chain
;
923 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
925 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
927 if (objfile
->sf
== NULL
)
929 /* No symbols to load, but we still need to make sure
930 that the section_offsets table is allocated. */
931 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
932 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
934 objfile
->num_sections
= num_sections
;
935 objfile
->section_offsets
936 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
938 memset (objfile
->section_offsets
, 0, size
);
942 /* Make sure that partially constructed symbol tables will be cleaned up
943 if an error occurs during symbol reading. */
944 old_chain
= make_cleanup (null_cleanup
, NULL
);
945 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
947 /* If ADDRS is NULL, put together a dummy address list.
948 We now establish the convention that an addr of zero means
949 no load address was specified. */
955 /* We will modify the main symbol table, make sure that all its users
956 will be cleaned up if an error occurs during symbol reading. */
957 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
959 /* Since no error yet, throw away the old symbol table. */
961 if (symfile_objfile
!= NULL
)
963 delete symfile_objfile
;
964 gdb_assert (symfile_objfile
== NULL
);
967 /* Currently we keep symbols from the add-symbol-file command.
968 If the user wants to get rid of them, they should do "symbol-file"
969 without arguments first. Not sure this is the best behavior
972 (*objfile
->sf
->sym_new_init
) (objfile
);
975 /* Convert addr into an offset rather than an absolute address.
976 We find the lowest address of a loaded segment in the objfile,
977 and assume that <addr> is where that got loaded.
979 We no longer warn if the lowest section is not a text segment (as
980 happens for the PA64 port. */
981 if (addrs
->size () > 0)
982 addr_info_make_relative (addrs
, objfile
->obfd
);
984 /* Initialize symbol reading routines for this objfile, allow complaints to
985 appear for this new file, and record how verbose to be, then do the
986 initial symbol reading for this file. */
988 (*objfile
->sf
->sym_init
) (objfile
);
989 clear_complaints (1);
991 (*objfile
->sf
->sym_offsets
) (objfile
, *addrs
);
993 read_symbols (objfile
, add_flags
);
995 /* Discard cleanups as symbol reading was successful. */
997 objfile_holder
.release ();
998 discard_cleanups (old_chain
);
1001 /* Same as syms_from_objfile_1, but also initializes the objfile
1002 entry-point info. */
1005 syms_from_objfile (struct objfile
*objfile
,
1006 section_addr_info
*addrs
,
1007 symfile_add_flags add_flags
)
1009 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1010 init_entry_point_info (objfile
);
1013 /* Perform required actions after either reading in the initial
1014 symbols for a new objfile, or mapping in the symbols from a reusable
1015 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1018 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1020 /* If this is the main symbol file we have to clean up all users of the
1021 old main symbol file. Otherwise it is sufficient to fixup all the
1022 breakpoints that may have been redefined by this symbol file. */
1023 if (add_flags
& SYMFILE_MAINLINE
)
1025 /* OK, make it the "real" symbol file. */
1026 symfile_objfile
= objfile
;
1028 clear_symtab_users (add_flags
);
1030 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1032 breakpoint_re_set ();
1035 /* We're done reading the symbol file; finish off complaints. */
1036 clear_complaints (0);
1039 /* Process a symbol file, as either the main file or as a dynamically
1042 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1043 A new reference is acquired by this function.
1045 For NAME description see the objfile constructor.
1047 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1048 extra, such as dynamically loaded code, and what to do with breakpoins.
1050 ADDRS is as described for syms_from_objfile_1, above.
1051 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1053 PARENT is the original objfile if ABFD is a separate debug info file.
1054 Otherwise PARENT is NULL.
1056 Upon success, returns a pointer to the objfile that was added.
1057 Upon failure, jumps back to command level (never returns). */
1059 static struct objfile
*
1060 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1061 symfile_add_flags add_flags
,
1062 section_addr_info
*addrs
,
1063 objfile_flags flags
, struct objfile
*parent
)
1065 struct objfile
*objfile
;
1066 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1067 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1068 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1069 && (readnow_symbol_files
1070 || (add_flags
& SYMFILE_NO_READ
) == 0));
1072 if (readnow_symbol_files
)
1074 flags
|= OBJF_READNOW
;
1075 add_flags
&= ~SYMFILE_NO_READ
;
1077 else if (readnever_symbol_files
1078 || (parent
!= NULL
&& (parent
->flags
& OBJF_READNEVER
)))
1080 flags
|= OBJF_READNEVER
;
1081 add_flags
|= SYMFILE_NO_READ
;
1083 if ((add_flags
& SYMFILE_NOT_FILENAME
) != 0)
1084 flags
|= OBJF_NOT_FILENAME
;
1086 /* Give user a chance to burp if we'd be
1087 interactively wiping out any existing symbols. */
1089 if ((have_full_symbols () || have_partial_symbols ())
1092 && !query (_("Load new symbol table from \"%s\"? "), name
))
1093 error (_("Not confirmed."));
1096 flags
|= OBJF_MAINLINE
;
1097 objfile
= new struct objfile (abfd
, name
, flags
);
1100 add_separate_debug_objfile (objfile
, parent
);
1102 /* We either created a new mapped symbol table, mapped an existing
1103 symbol table file which has not had initial symbol reading
1104 performed, or need to read an unmapped symbol table. */
1107 if (deprecated_pre_add_symbol_hook
)
1108 deprecated_pre_add_symbol_hook (name
);
1111 printf_unfiltered (_("Reading symbols from %s..."), name
);
1113 gdb_flush (gdb_stdout
);
1116 syms_from_objfile (objfile
, addrs
, add_flags
);
1118 /* We now have at least a partial symbol table. Check to see if the
1119 user requested that all symbols be read on initial access via either
1120 the gdb startup command line or on a per symbol file basis. Expand
1121 all partial symbol tables for this objfile if so. */
1123 if ((flags
& OBJF_READNOW
))
1127 printf_unfiltered (_("expanding to full symbols..."));
1129 gdb_flush (gdb_stdout
);
1133 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1136 if (should_print
&& !objfile_has_symbols (objfile
))
1139 printf_unfiltered (_("(no debugging symbols found)..."));
1145 if (deprecated_post_add_symbol_hook
)
1146 deprecated_post_add_symbol_hook ();
1148 printf_unfiltered (_("done.\n"));
1151 /* We print some messages regardless of whether 'from_tty ||
1152 info_verbose' is true, so make sure they go out at the right
1154 gdb_flush (gdb_stdout
);
1156 if (objfile
->sf
== NULL
)
1158 gdb::observers::new_objfile
.notify (objfile
);
1159 return objfile
; /* No symbols. */
1162 finish_new_objfile (objfile
, add_flags
);
1164 gdb::observers::new_objfile
.notify (objfile
);
1166 bfd_cache_close_all ();
1170 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1171 see the objfile constructor. */
1174 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1175 symfile_add_flags symfile_flags
,
1176 struct objfile
*objfile
)
1178 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1179 because sections of BFD may not match sections of OBJFILE and because
1180 vma may have been modified by tools such as prelink. */
1181 section_addr_info sap
= build_section_addr_info_from_objfile (objfile
);
1183 symbol_file_add_with_addrs
1184 (bfd
, name
, symfile_flags
, &sap
,
1185 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1190 /* Process the symbol file ABFD, as either the main file or as a
1191 dynamically loaded file.
1192 See symbol_file_add_with_addrs's comments for details. */
1195 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1196 symfile_add_flags add_flags
,
1197 section_addr_info
*addrs
,
1198 objfile_flags flags
, struct objfile
*parent
)
1200 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1204 /* Process a symbol file, as either the main file or as a dynamically
1205 loaded file. See symbol_file_add_with_addrs's comments for details. */
1208 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1209 section_addr_info
*addrs
, objfile_flags flags
)
1211 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1213 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1217 /* Call symbol_file_add() with default values and update whatever is
1218 affected by the loading of a new main().
1219 Used when the file is supplied in the gdb command line
1220 and by some targets with special loading requirements.
1221 The auxiliary function, symbol_file_add_main_1(), has the flags
1222 argument for the switches that can only be specified in the symbol_file
1226 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1228 symbol_file_add_main_1 (args
, add_flags
, 0, 0);
1232 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1233 objfile_flags flags
, CORE_ADDR reloff
)
1235 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1237 struct objfile
*objfile
= symbol_file_add (args
, add_flags
, NULL
, flags
);
1239 objfile_rebase (objfile
, reloff
);
1241 /* Getting new symbols may change our opinion about
1242 what is frameless. */
1243 reinit_frame_cache ();
1245 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1246 set_initial_language ();
1250 symbol_file_clear (int from_tty
)
1252 if ((have_full_symbols () || have_partial_symbols ())
1255 ? !query (_("Discard symbol table from `%s'? "),
1256 objfile_name (symfile_objfile
))
1257 : !query (_("Discard symbol table? "))))
1258 error (_("Not confirmed."));
1260 /* solib descriptors may have handles to objfiles. Wipe them before their
1261 objfiles get stale by free_all_objfiles. */
1262 no_shared_libraries (NULL
, from_tty
);
1264 free_all_objfiles ();
1266 gdb_assert (symfile_objfile
== NULL
);
1268 printf_unfiltered (_("No symbol file now.\n"));
1271 /* See symfile.h. */
1273 int separate_debug_file_debug
= 0;
1276 separate_debug_file_exists (const std::string
&name
, unsigned long crc
,
1277 struct objfile
*parent_objfile
)
1279 unsigned long file_crc
;
1281 struct stat parent_stat
, abfd_stat
;
1282 int verified_as_different
;
1284 /* Find a separate debug info file as if symbols would be present in
1285 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1286 section can contain just the basename of PARENT_OBJFILE without any
1287 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1288 the separate debug infos with the same basename can exist. */
1290 if (filename_cmp (name
.c_str (), objfile_name (parent_objfile
)) == 0)
1293 if (separate_debug_file_debug
)
1294 printf_unfiltered (_(" Trying %s\n"), name
.c_str ());
1296 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
.c_str (), gnutarget
, -1));
1301 /* Verify symlinks were not the cause of filename_cmp name difference above.
1303 Some operating systems, e.g. Windows, do not provide a meaningful
1304 st_ino; they always set it to zero. (Windows does provide a
1305 meaningful st_dev.) Files accessed from gdbservers that do not
1306 support the vFile:fstat packet will also have st_ino set to zero.
1307 Do not indicate a duplicate library in either case. While there
1308 is no guarantee that a system that provides meaningful inode
1309 numbers will never set st_ino to zero, this is merely an
1310 optimization, so we do not need to worry about false negatives. */
1312 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1313 && abfd_stat
.st_ino
!= 0
1314 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1316 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1317 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1319 verified_as_different
= 1;
1322 verified_as_different
= 0;
1324 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1329 if (crc
!= file_crc
)
1331 unsigned long parent_crc
;
1333 /* If the files could not be verified as different with
1334 bfd_stat then we need to calculate the parent's CRC
1335 to verify whether the files are different or not. */
1337 if (!verified_as_different
)
1339 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1343 if (verified_as_different
|| parent_crc
!= file_crc
)
1344 warning (_("the debug information found in \"%s\""
1345 " does not match \"%s\" (CRC mismatch).\n"),
1346 name
.c_str (), objfile_name (parent_objfile
));
1354 char *debug_file_directory
= NULL
;
1356 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1357 struct cmd_list_element
*c
, const char *value
)
1359 fprintf_filtered (file
,
1360 _("The directory where separate debug "
1361 "symbols are searched for is \"%s\".\n"),
1365 #if ! defined (DEBUG_SUBDIRECTORY)
1366 #define DEBUG_SUBDIRECTORY ".debug"
1369 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1370 where the original file resides (may not be the same as
1371 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1372 looking for. CANON_DIR is the "realpath" form of DIR.
1373 DIR must contain a trailing '/'.
1374 Returns the path of the file with separate debug info, or an empty
1378 find_separate_debug_file (const char *dir
,
1379 const char *canon_dir
,
1380 const char *debuglink
,
1381 unsigned long crc32
, struct objfile
*objfile
)
1383 if (separate_debug_file_debug
)
1384 printf_unfiltered (_("\nLooking for separate debug info (debug link) for "
1385 "%s\n"), objfile_name (objfile
));
1387 /* First try in the same directory as the original file. */
1388 std::string debugfile
= dir
;
1389 debugfile
+= debuglink
;
1391 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1394 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1396 debugfile
+= DEBUG_SUBDIRECTORY
;
1398 debugfile
+= debuglink
;
1400 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1403 /* Then try in the global debugfile directories.
1405 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1406 cause "/..." lookups. */
1408 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
1409 = dirnames_to_char_ptr_vec (debug_file_directory
);
1411 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
1413 debugfile
= debugdir
.get ();
1416 debugfile
+= debuglink
;
1418 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1421 /* If the file is in the sysroot, try using its base path in the
1422 global debugfile directory. */
1423 if (canon_dir
!= NULL
1424 && filename_ncmp (canon_dir
, gdb_sysroot
,
1425 strlen (gdb_sysroot
)) == 0
1426 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1428 debugfile
= debugdir
.get ();
1429 debugfile
+= (canon_dir
+ strlen (gdb_sysroot
));
1431 debugfile
+= debuglink
;
1433 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1438 return std::string ();
1441 /* Modify PATH to contain only "[/]directory/" part of PATH.
1442 If there were no directory separators in PATH, PATH will be empty
1443 string on return. */
1446 terminate_after_last_dir_separator (char *path
)
1450 /* Strip off the final filename part, leaving the directory name,
1451 followed by a slash. The directory can be relative or absolute. */
1452 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1453 if (IS_DIR_SEPARATOR (path
[i
]))
1456 /* If I is -1 then no directory is present there and DIR will be "". */
1460 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1461 Returns pathname, or an empty string. */
1464 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1466 unsigned long crc32
;
1468 gdb::unique_xmalloc_ptr
<char> debuglink
1469 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1471 if (debuglink
== NULL
)
1473 /* There's no separate debug info, hence there's no way we could
1474 load it => no warning. */
1475 return std::string ();
1478 std::string dir
= objfile_name (objfile
);
1479 terminate_after_last_dir_separator (&dir
[0]);
1480 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1482 std::string debugfile
1483 = find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1484 debuglink
.get (), crc32
, objfile
);
1486 if (debugfile
.empty ())
1488 /* For PR gdb/9538, try again with realpath (if different from the
1493 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1494 && S_ISLNK (st_buf
.st_mode
))
1496 gdb::unique_xmalloc_ptr
<char> symlink_dir
1497 (lrealpath (objfile_name (objfile
)));
1498 if (symlink_dir
!= NULL
)
1500 terminate_after_last_dir_separator (symlink_dir
.get ());
1501 if (dir
!= symlink_dir
.get ())
1503 /* Different directory, so try using it. */
1504 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1517 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1521 validate_readnow_readnever (objfile_flags flags
)
1523 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1524 error (_("-readnow and -readnever cannot be used simultaneously"));
1527 /* This is the symbol-file command. Read the file, analyze its
1528 symbols, and add a struct symtab to a symtab list. The syntax of
1529 the command is rather bizarre:
1531 1. The function buildargv implements various quoting conventions
1532 which are undocumented and have little or nothing in common with
1533 the way things are quoted (or not quoted) elsewhere in GDB.
1535 2. Options are used, which are not generally used in GDB (perhaps
1536 "set mapped on", "set readnow on" would be better)
1538 3. The order of options matters, which is contrary to GNU
1539 conventions (because it is confusing and inconvenient). */
1542 symbol_file_command (const char *args
, int from_tty
)
1548 symbol_file_clear (from_tty
);
1552 objfile_flags flags
= OBJF_USERLOADED
;
1553 symfile_add_flags add_flags
= 0;
1555 bool stop_processing_options
= false;
1556 CORE_ADDR offset
= 0;
1561 add_flags
|= SYMFILE_VERBOSE
;
1563 gdb_argv
built_argv (args
);
1564 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1566 if (stop_processing_options
|| *arg
!= '-')
1571 error (_("Unrecognized argument \"%s\""), arg
);
1573 else if (strcmp (arg
, "-readnow") == 0)
1574 flags
|= OBJF_READNOW
;
1575 else if (strcmp (arg
, "-readnever") == 0)
1576 flags
|= OBJF_READNEVER
;
1577 else if (strcmp (arg
, "-o") == 0)
1579 arg
= built_argv
[++idx
];
1581 error (_("Missing argument to -o"));
1583 offset
= parse_and_eval_address (arg
);
1585 else if (strcmp (arg
, "--") == 0)
1586 stop_processing_options
= true;
1588 error (_("Unrecognized argument \"%s\""), arg
);
1592 error (_("no symbol file name was specified"));
1594 validate_readnow_readnever (flags
);
1596 symbol_file_add_main_1 (name
, add_flags
, flags
, offset
);
1600 /* Set the initial language.
1602 FIXME: A better solution would be to record the language in the
1603 psymtab when reading partial symbols, and then use it (if known) to
1604 set the language. This would be a win for formats that encode the
1605 language in an easily discoverable place, such as DWARF. For
1606 stabs, we can jump through hoops looking for specially named
1607 symbols or try to intuit the language from the specific type of
1608 stabs we find, but we can't do that until later when we read in
1612 set_initial_language (void)
1614 enum language lang
= main_language ();
1616 if (lang
== language_unknown
)
1618 char *name
= main_name ();
1619 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1622 lang
= SYMBOL_LANGUAGE (sym
);
1625 if (lang
== language_unknown
)
1627 /* Make C the default language */
1631 set_language (lang
);
1632 expected_language
= current_language
; /* Don't warn the user. */
1635 /* Open the file specified by NAME and hand it off to BFD for
1636 preliminary analysis. Return a newly initialized bfd *, which
1637 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1638 absolute). In case of trouble, error() is called. */
1641 symfile_bfd_open (const char *name
)
1645 gdb::unique_xmalloc_ptr
<char> absolute_name
;
1646 if (!is_target_filename (name
))
1648 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1650 /* Look down path for it, allocate 2nd new malloc'd copy. */
1651 desc
= openp (getenv ("PATH"),
1652 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1653 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1654 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1657 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1659 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1660 desc
= openp (getenv ("PATH"),
1661 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1662 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1666 perror_with_name (expanded_name
.get ());
1668 name
= absolute_name
.get ();
1671 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1672 if (sym_bfd
== NULL
)
1673 error (_("`%s': can't open to read symbols: %s."), name
,
1674 bfd_errmsg (bfd_get_error ()));
1676 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1677 bfd_set_cacheable (sym_bfd
.get (), 1);
1679 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1680 error (_("`%s': can't read symbols: %s."), name
,
1681 bfd_errmsg (bfd_get_error ()));
1686 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1687 the section was not found. */
1690 get_section_index (struct objfile
*objfile
, const char *section_name
)
1692 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1700 /* Link SF into the global symtab_fns list.
1701 FLAVOUR is the file format that SF handles.
1702 Called on startup by the _initialize routine in each object file format
1703 reader, to register information about each format the reader is prepared
1707 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1709 symtab_fns
.emplace_back (flavour
, sf
);
1712 /* Initialize OBJFILE to read symbols from its associated BFD. It
1713 either returns or calls error(). The result is an initialized
1714 struct sym_fns in the objfile structure, that contains cached
1715 information about the symbol file. */
1717 static const struct sym_fns
*
1718 find_sym_fns (bfd
*abfd
)
1720 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1722 if (our_flavour
== bfd_target_srec_flavour
1723 || our_flavour
== bfd_target_ihex_flavour
1724 || our_flavour
== bfd_target_tekhex_flavour
)
1725 return NULL
; /* No symbols. */
1727 for (const registered_sym_fns
&rsf
: symtab_fns
)
1728 if (our_flavour
== rsf
.sym_flavour
)
1731 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1732 bfd_get_target (abfd
));
1736 /* This function runs the load command of our current target. */
1739 load_command (const char *arg
, int from_tty
)
1743 /* The user might be reloading because the binary has changed. Take
1744 this opportunity to check. */
1745 reopen_exec_file ();
1751 const char *parg
, *prev
;
1753 arg
= get_exec_file (1);
1755 /* We may need to quote this string so buildargv can pull it
1758 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1760 temp
.append (prev
, parg
- prev
);
1762 temp
.push_back ('\\');
1764 /* If we have not copied anything yet, then we didn't see a
1765 character to quote, and we can just leave ARG unchanged. */
1769 arg
= temp
.c_str ();
1773 target_load (arg
, from_tty
);
1775 /* After re-loading the executable, we don't really know which
1776 overlays are mapped any more. */
1777 overlay_cache_invalid
= 1;
1780 /* This version of "load" should be usable for any target. Currently
1781 it is just used for remote targets, not inftarg.c or core files,
1782 on the theory that only in that case is it useful.
1784 Avoiding xmodem and the like seems like a win (a) because we don't have
1785 to worry about finding it, and (b) On VMS, fork() is very slow and so
1786 we don't want to run a subprocess. On the other hand, I'm not sure how
1787 performance compares. */
1789 static int validate_download
= 0;
1791 /* Callback service function for generic_load (bfd_map_over_sections). */
1794 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1796 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1798 *sum
+= bfd_get_section_size (asec
);
1801 /* Opaque data for load_progress. */
1802 struct load_progress_data
1804 /* Cumulative data. */
1805 unsigned long write_count
= 0;
1806 unsigned long data_count
= 0;
1807 bfd_size_type total_size
= 0;
1810 /* Opaque data for load_progress for a single section. */
1811 struct load_progress_section_data
1813 load_progress_section_data (load_progress_data
*cumulative_
,
1814 const char *section_name_
, ULONGEST section_size_
,
1815 CORE_ADDR lma_
, gdb_byte
*buffer_
)
1816 : cumulative (cumulative_
), section_name (section_name_
),
1817 section_size (section_size_
), lma (lma_
), buffer (buffer_
)
1820 struct load_progress_data
*cumulative
;
1822 /* Per-section data. */
1823 const char *section_name
;
1824 ULONGEST section_sent
= 0;
1825 ULONGEST section_size
;
1830 /* Opaque data for load_section_callback. */
1831 struct load_section_data
1833 load_section_data (load_progress_data
*progress_data_
)
1834 : progress_data (progress_data_
)
1837 ~load_section_data ()
1839 for (auto &&request
: requests
)
1841 xfree (request
.data
);
1842 delete ((load_progress_section_data
*) request
.baton
);
1846 CORE_ADDR load_offset
= 0;
1847 struct load_progress_data
*progress_data
;
1848 std::vector
<struct memory_write_request
> requests
;
1851 /* Target write callback routine for progress reporting. */
1854 load_progress (ULONGEST bytes
, void *untyped_arg
)
1856 struct load_progress_section_data
*args
1857 = (struct load_progress_section_data
*) untyped_arg
;
1858 struct load_progress_data
*totals
;
1861 /* Writing padding data. No easy way to get at the cumulative
1862 stats, so just ignore this. */
1865 totals
= args
->cumulative
;
1867 if (bytes
== 0 && args
->section_sent
== 0)
1869 /* The write is just starting. Let the user know we've started
1871 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1873 hex_string (args
->section_size
),
1874 paddress (target_gdbarch (), args
->lma
));
1878 if (validate_download
)
1880 /* Broken memories and broken monitors manifest themselves here
1881 when bring new computers to life. This doubles already slow
1883 /* NOTE: cagney/1999-10-18: A more efficient implementation
1884 might add a verify_memory() method to the target vector and
1885 then use that. remote.c could implement that method using
1886 the ``qCRC'' packet. */
1887 gdb::byte_vector
check (bytes
);
1889 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1890 error (_("Download verify read failed at %s"),
1891 paddress (target_gdbarch (), args
->lma
));
1892 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1893 error (_("Download verify compare failed at %s"),
1894 paddress (target_gdbarch (), args
->lma
));
1896 totals
->data_count
+= bytes
;
1898 args
->buffer
+= bytes
;
1899 totals
->write_count
+= 1;
1900 args
->section_sent
+= bytes
;
1901 if (check_quit_flag ()
1902 || (deprecated_ui_load_progress_hook
!= NULL
1903 && deprecated_ui_load_progress_hook (args
->section_name
,
1904 args
->section_sent
)))
1905 error (_("Canceled the download"));
1907 if (deprecated_show_load_progress
!= NULL
)
1908 deprecated_show_load_progress (args
->section_name
,
1912 totals
->total_size
);
1915 /* Callback service function for generic_load (bfd_map_over_sections). */
1918 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1920 struct load_section_data
*args
= (struct load_section_data
*) data
;
1921 bfd_size_type size
= bfd_get_section_size (asec
);
1922 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1924 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1930 ULONGEST begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1931 ULONGEST end
= begin
+ size
;
1932 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (size
);
1933 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1935 load_progress_section_data
*section_data
1936 = new load_progress_section_data (args
->progress_data
, sect_name
, size
,
1939 args
->requests
.emplace_back (begin
, end
, buffer
, section_data
);
1942 static void print_transfer_performance (struct ui_file
*stream
,
1943 unsigned long data_count
,
1944 unsigned long write_count
,
1945 std::chrono::steady_clock::duration d
);
1948 generic_load (const char *args
, int from_tty
)
1950 struct load_progress_data total_progress
;
1951 struct load_section_data
cbdata (&total_progress
);
1952 struct ui_out
*uiout
= current_uiout
;
1955 error_no_arg (_("file to load"));
1957 gdb_argv
argv (args
);
1959 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
1961 if (argv
[1] != NULL
)
1965 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
1967 /* If the last word was not a valid number then
1968 treat it as a file name with spaces in. */
1969 if (argv
[1] == endptr
)
1970 error (_("Invalid download offset:%s."), argv
[1]);
1972 if (argv
[2] != NULL
)
1973 error (_("Too many parameters."));
1976 /* Open the file for loading. */
1977 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
1978 if (loadfile_bfd
== NULL
)
1979 perror_with_name (filename
.get ());
1981 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
1983 error (_("\"%s\" is not an object file: %s"), filename
.get (),
1984 bfd_errmsg (bfd_get_error ()));
1987 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
1988 (void *) &total_progress
.total_size
);
1990 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
1992 using namespace std::chrono
;
1994 steady_clock::time_point start_time
= steady_clock::now ();
1996 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
1997 load_progress
) != 0)
1998 error (_("Load failed"));
2000 steady_clock::time_point end_time
= steady_clock::now ();
2002 CORE_ADDR entry
= bfd_get_start_address (loadfile_bfd
.get ());
2003 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2004 uiout
->text ("Start address ");
2005 uiout
->field_fmt ("address", "%s", paddress (target_gdbarch (), entry
));
2006 uiout
->text (", load size ");
2007 uiout
->field_fmt ("load-size", "%lu", total_progress
.data_count
);
2009 regcache_write_pc (get_current_regcache (), entry
);
2011 /* Reset breakpoints, now that we have changed the load image. For
2012 instance, breakpoints may have been set (or reset, by
2013 post_create_inferior) while connected to the target but before we
2014 loaded the program. In that case, the prologue analyzer could
2015 have read instructions from the target to find the right
2016 breakpoint locations. Loading has changed the contents of that
2019 breakpoint_re_set ();
2021 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2022 total_progress
.write_count
,
2023 end_time
- start_time
);
2026 /* Report on STREAM the performance of a memory transfer operation,
2027 such as 'load'. DATA_COUNT is the number of bytes transferred.
2028 WRITE_COUNT is the number of separate write operations, or 0, if
2029 that information is not available. TIME is how long the operation
2033 print_transfer_performance (struct ui_file
*stream
,
2034 unsigned long data_count
,
2035 unsigned long write_count
,
2036 std::chrono::steady_clock::duration time
)
2038 using namespace std::chrono
;
2039 struct ui_out
*uiout
= current_uiout
;
2041 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2043 uiout
->text ("Transfer rate: ");
2044 if (ms
.count () > 0)
2046 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2048 if (uiout
->is_mi_like_p ())
2050 uiout
->field_fmt ("transfer-rate", "%lu", rate
* 8);
2051 uiout
->text (" bits/sec");
2053 else if (rate
< 1024)
2055 uiout
->field_fmt ("transfer-rate", "%lu", rate
);
2056 uiout
->text (" bytes/sec");
2060 uiout
->field_fmt ("transfer-rate", "%lu", rate
/ 1024);
2061 uiout
->text (" KB/sec");
2066 uiout
->field_fmt ("transferred-bits", "%lu", (data_count
* 8));
2067 uiout
->text (" bits in <1 sec");
2069 if (write_count
> 0)
2072 uiout
->field_fmt ("write-rate", "%lu", data_count
/ write_count
);
2073 uiout
->text (" bytes/write");
2075 uiout
->text (".\n");
2078 /* This function allows the addition of incrementally linked object files.
2079 It does not modify any state in the target, only in the debugger. */
2080 /* Note: ezannoni 2000-04-13 This function/command used to have a
2081 special case syntax for the rombug target (Rombug is the boot
2082 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2083 rombug case, the user doesn't need to supply a text address,
2084 instead a call to target_link() (in target.c) would supply the
2085 value to use. We are now discontinuing this type of ad hoc syntax. */
2088 add_symbol_file_command (const char *args
, int from_tty
)
2090 struct gdbarch
*gdbarch
= get_current_arch ();
2091 gdb::unique_xmalloc_ptr
<char> filename
;
2094 struct objfile
*objf
;
2095 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2096 symfile_add_flags add_flags
= 0;
2099 add_flags
|= SYMFILE_VERBOSE
;
2107 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2108 bool stop_processing_options
= false;
2113 error (_("add-symbol-file takes a file name and an address"));
2115 bool seen_addr
= false;
2116 gdb_argv
argv (args
);
2118 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2120 if (stop_processing_options
|| *arg
!= '-')
2122 if (filename
== NULL
)
2124 /* First non-option argument is always the filename. */
2125 filename
.reset (tilde_expand (arg
));
2127 else if (!seen_addr
)
2129 /* The second non-option argument is always the text
2130 address at which to load the program. */
2131 sect_opts
[0].value
= arg
;
2135 error (_("Unrecognized argument \"%s\""), arg
);
2137 else if (strcmp (arg
, "-readnow") == 0)
2138 flags
|= OBJF_READNOW
;
2139 else if (strcmp (arg
, "-readnever") == 0)
2140 flags
|= OBJF_READNEVER
;
2141 else if (strcmp (arg
, "-s") == 0)
2143 if (argv
[argcnt
+ 1] == NULL
)
2144 error (_("Missing section name after \"-s\""));
2145 else if (argv
[argcnt
+ 2] == NULL
)
2146 error (_("Missing section address after \"-s\""));
2148 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2150 sect_opts
.push_back (sect
);
2153 else if (strcmp (arg
, "--") == 0)
2154 stop_processing_options
= true;
2156 error (_("Unrecognized argument \"%s\""), arg
);
2159 if (filename
== NULL
)
2160 error (_("You must provide a filename to be loaded."));
2162 validate_readnow_readnever (flags
);
2164 /* This command takes at least two arguments. The first one is a
2165 filename, and the second is the address where this file has been
2166 loaded. Abort now if this address hasn't been provided by the
2169 error (_("The address where %s has been loaded is missing"),
2172 /* Print the prompt for the query below. And save the arguments into
2173 a sect_addr_info structure to be passed around to other
2174 functions. We have to split this up into separate print
2175 statements because hex_string returns a local static
2178 printf_unfiltered (_("add symbol table from file \"%s\" at\n"),
2180 section_addr_info section_addrs
;
2181 for (sect_opt
§
: sect_opts
)
2184 const char *val
= sect
.value
;
2185 const char *sec
= sect
.name
;
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. */
2191 section_addrs
.emplace_back (addr
, sec
, 0);
2192 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2193 paddress (gdbarch
, addr
));
2195 /* The object's sections are initialized when a
2196 call is made to build_objfile_section_table (objfile).
2197 This happens in reread_symbols.
2198 At this point, we don't know what file type this is,
2199 so we can't determine what section names are valid. */
2202 if (from_tty
&& (!query ("%s", "")))
2203 error (_("Not confirmed."));
2205 objf
= symbol_file_add (filename
.get (), add_flags
, §ion_addrs
,
2208 add_target_sections_of_objfile (objf
);
2210 /* Getting new symbols may change our opinion about what is
2212 reinit_frame_cache ();
2216 /* This function removes a symbol file that was added via add-symbol-file. */
2219 remove_symbol_file_command (const char *args
, int from_tty
)
2221 struct objfile
*objf
= NULL
;
2222 struct program_space
*pspace
= current_program_space
;
2227 error (_("remove-symbol-file: no symbol file provided"));
2229 gdb_argv
argv (args
);
2231 if (strcmp (argv
[0], "-a") == 0)
2233 /* Interpret the next argument as an address. */
2236 if (argv
[1] == NULL
)
2237 error (_("Missing address argument"));
2239 if (argv
[2] != NULL
)
2240 error (_("Junk after %s"), argv
[1]);
2242 addr
= parse_and_eval_address (argv
[1]);
2246 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2247 && (objf
->flags
& OBJF_SHARED
) != 0
2248 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2252 else if (argv
[0] != NULL
)
2254 /* Interpret the current argument as a file name. */
2256 if (argv
[1] != NULL
)
2257 error (_("Junk after %s"), argv
[0]);
2259 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2263 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2264 && (objf
->flags
& OBJF_SHARED
) != 0
2265 && objf
->pspace
== pspace
2266 && filename_cmp (filename
.get (), objfile_name (objf
)) == 0)
2272 error (_("No symbol file found"));
2275 && !query (_("Remove symbol table from file \"%s\"? "),
2276 objfile_name (objf
)))
2277 error (_("Not confirmed."));
2280 clear_symtab_users (0);
2283 /* Re-read symbols if a symbol-file has changed. */
2286 reread_symbols (void)
2288 struct objfile
*objfile
;
2290 struct stat new_statbuf
;
2292 std::vector
<struct objfile
*> new_objfiles
;
2294 /* With the addition of shared libraries, this should be modified,
2295 the load time should be saved in the partial symbol tables, since
2296 different tables may come from different source files. FIXME.
2297 This routine should then walk down each partial symbol table
2298 and see if the symbol table that it originates from has been changed. */
2300 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2302 if (objfile
->obfd
== NULL
)
2305 /* Separate debug objfiles are handled in the main objfile. */
2306 if (objfile
->separate_debug_objfile_backlink
)
2309 /* If this object is from an archive (what you usually create with
2310 `ar', often called a `static library' on most systems, though
2311 a `shared library' on AIX is also an archive), then you should
2312 stat on the archive name, not member name. */
2313 if (objfile
->obfd
->my_archive
)
2314 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2316 res
= stat (objfile_name (objfile
), &new_statbuf
);
2319 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2320 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2321 objfile_name (objfile
));
2324 new_modtime
= new_statbuf
.st_mtime
;
2325 if (new_modtime
!= objfile
->mtime
)
2327 struct cleanup
*old_cleanups
;
2328 struct section_offsets
*offsets
;
2331 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2332 objfile_name (objfile
));
2334 /* There are various functions like symbol_file_add,
2335 symfile_bfd_open, syms_from_objfile, etc., which might
2336 appear to do what we want. But they have various other
2337 effects which we *don't* want. So we just do stuff
2338 ourselves. We don't worry about mapped files (for one thing,
2339 any mapped file will be out of date). */
2341 /* If we get an error, blow away this objfile (not sure if
2342 that is the correct response for things like shared
2344 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
2346 /* We need to do this whenever any symbols go away. */
2347 old_cleanups
= make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2349 if (exec_bfd
!= NULL
2350 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2351 bfd_get_filename (exec_bfd
)) == 0)
2353 /* Reload EXEC_BFD without asking anything. */
2355 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2358 /* Keep the calls order approx. the same as in free_objfile. */
2360 /* Free the separate debug objfiles. It will be
2361 automatically recreated by sym_read. */
2362 free_objfile_separate_debug (objfile
);
2364 /* Remove any references to this objfile in the global
2366 preserve_values (objfile
);
2368 /* Nuke all the state that we will re-read. Much of the following
2369 code which sets things to NULL really is necessary to tell
2370 other parts of GDB that there is nothing currently there.
2372 Try to keep the freeing order compatible with free_objfile. */
2374 if (objfile
->sf
!= NULL
)
2376 (*objfile
->sf
->sym_finish
) (objfile
);
2379 clear_objfile_data (objfile
);
2381 /* Clean up any state BFD has sitting around. */
2383 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2384 char *obfd_filename
;
2386 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2387 /* Open the new BFD before freeing the old one, so that
2388 the filename remains live. */
2389 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2390 objfile
->obfd
= temp
.release ();
2391 if (objfile
->obfd
== NULL
)
2392 error (_("Can't open %s to read symbols."), obfd_filename
);
2395 std::string original_name
= objfile
->original_name
;
2397 /* bfd_openr sets cacheable to true, which is what we want. */
2398 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2399 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2400 bfd_errmsg (bfd_get_error ()));
2402 /* Save the offsets, we will nuke them with the rest of the
2404 num_offsets
= objfile
->num_sections
;
2405 offsets
= ((struct section_offsets
*)
2406 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2407 memcpy (offsets
, objfile
->section_offsets
,
2408 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2410 /* FIXME: Do we have to free a whole linked list, or is this
2412 objfile
->global_psymbols
.clear ();
2413 objfile
->static_psymbols
.clear ();
2415 /* Free the obstacks for non-reusable objfiles. */
2416 psymbol_bcache_free (objfile
->psymbol_cache
);
2417 objfile
->psymbol_cache
= psymbol_bcache_init ();
2419 /* NB: after this call to obstack_free, objfiles_changed
2420 will need to be called (see discussion below). */
2421 obstack_free (&objfile
->objfile_obstack
, 0);
2422 objfile
->sections
= NULL
;
2423 objfile
->compunit_symtabs
= NULL
;
2424 objfile
->psymtabs
= NULL
;
2425 objfile
->psymtabs_addrmap
= NULL
;
2426 objfile
->free_psymtabs
= NULL
;
2427 objfile
->template_symbols
= NULL
;
2429 /* obstack_init also initializes the obstack so it is
2430 empty. We could use obstack_specify_allocation but
2431 gdb_obstack.h specifies the alloc/dealloc functions. */
2432 obstack_init (&objfile
->objfile_obstack
);
2434 /* set_objfile_per_bfd potentially allocates the per-bfd
2435 data on the objfile's obstack (if sharing data across
2436 multiple users is not possible), so it's important to
2437 do it *after* the obstack has been initialized. */
2438 set_objfile_per_bfd (objfile
);
2440 objfile
->original_name
2441 = (char *) obstack_copy0 (&objfile
->objfile_obstack
,
2442 original_name
.c_str (),
2443 original_name
.size ());
2445 /* Reset the sym_fns pointer. The ELF reader can change it
2446 based on whether .gdb_index is present, and we need it to
2447 start over. PR symtab/15885 */
2448 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2450 build_objfile_section_table (objfile
);
2451 terminate_minimal_symbol_table (objfile
);
2453 /* We use the same section offsets as from last time. I'm not
2454 sure whether that is always correct for shared libraries. */
2455 objfile
->section_offsets
= (struct section_offsets
*)
2456 obstack_alloc (&objfile
->objfile_obstack
,
2457 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2458 memcpy (objfile
->section_offsets
, offsets
,
2459 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2460 objfile
->num_sections
= num_offsets
;
2462 /* What the hell is sym_new_init for, anyway? The concept of
2463 distinguishing between the main file and additional files
2464 in this way seems rather dubious. */
2465 if (objfile
== symfile_objfile
)
2467 (*objfile
->sf
->sym_new_init
) (objfile
);
2470 (*objfile
->sf
->sym_init
) (objfile
);
2471 clear_complaints (1);
2473 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2475 /* We are about to read new symbols and potentially also
2476 DWARF information. Some targets may want to pass addresses
2477 read from DWARF DIE's through an adjustment function before
2478 saving them, like MIPS, which may call into
2479 "find_pc_section". When called, that function will make
2480 use of per-objfile program space data.
2482 Since we discarded our section information above, we have
2483 dangling pointers in the per-objfile program space data
2484 structure. Force GDB to update the section mapping
2485 information by letting it know the objfile has changed,
2486 making the dangling pointers point to correct data
2489 objfiles_changed ();
2491 read_symbols (objfile
, 0);
2493 if (!objfile_has_symbols (objfile
))
2496 printf_unfiltered (_("(no debugging symbols found)\n"));
2500 /* We're done reading the symbol file; finish off complaints. */
2501 clear_complaints (0);
2503 /* Getting new symbols may change our opinion about what is
2506 reinit_frame_cache ();
2508 /* Discard cleanups as symbol reading was successful. */
2509 objfile_holder
.release ();
2510 discard_cleanups (old_cleanups
);
2512 /* If the mtime has changed between the time we set new_modtime
2513 and now, we *want* this to be out of date, so don't call stat
2515 objfile
->mtime
= new_modtime
;
2516 init_entry_point_info (objfile
);
2518 new_objfiles
.push_back (objfile
);
2522 if (!new_objfiles
.empty ())
2524 clear_symtab_users (0);
2526 /* clear_objfile_data for each objfile was called before freeing it and
2527 gdb::observers::new_objfile.notify (NULL) has been called by
2528 clear_symtab_users above. Notify the new files now. */
2529 for (auto iter
: new_objfiles
)
2530 gdb::observers::new_objfile
.notify (objfile
);
2532 /* At least one objfile has changed, so we can consider that
2533 the executable we're debugging has changed too. */
2534 gdb::observers::executable_changed
.notify ();
2539 struct filename_language
2541 filename_language (const std::string
&ext_
, enum language lang_
)
2542 : ext (ext_
), lang (lang_
)
2549 static std::vector
<filename_language
> filename_language_table
;
2551 /* See symfile.h. */
2554 add_filename_language (const char *ext
, enum language lang
)
2556 filename_language_table
.emplace_back (ext
, lang
);
2559 static char *ext_args
;
2561 show_ext_args (struct ui_file
*file
, int from_tty
,
2562 struct cmd_list_element
*c
, const char *value
)
2564 fprintf_filtered (file
,
2565 _("Mapping between filename extension "
2566 "and source language is \"%s\".\n"),
2571 set_ext_lang_command (const char *args
,
2572 int from_tty
, struct cmd_list_element
*e
)
2574 char *cp
= ext_args
;
2577 /* First arg is filename extension, starting with '.' */
2579 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2581 /* Find end of first arg. */
2582 while (*cp
&& !isspace (*cp
))
2586 error (_("'%s': two arguments required -- "
2587 "filename extension and language"),
2590 /* Null-terminate first arg. */
2593 /* Find beginning of second arg, which should be a source language. */
2594 cp
= skip_spaces (cp
);
2597 error (_("'%s': two arguments required -- "
2598 "filename extension and language"),
2601 /* Lookup the language from among those we know. */
2602 lang
= language_enum (cp
);
2604 auto it
= filename_language_table
.begin ();
2605 /* Now lookup the filename extension: do we already know it? */
2606 for (; it
!= filename_language_table
.end (); it
++)
2608 if (it
->ext
== ext_args
)
2612 if (it
== filename_language_table
.end ())
2614 /* New file extension. */
2615 add_filename_language (ext_args
, lang
);
2619 /* Redefining a previously known filename extension. */
2622 /* query ("Really make files of type %s '%s'?", */
2623 /* ext_args, language_str (lang)); */
2630 info_ext_lang_command (const char *args
, int from_tty
)
2632 printf_filtered (_("Filename extensions and the languages they represent:"));
2633 printf_filtered ("\n\n");
2634 for (const filename_language
&entry
: filename_language_table
)
2635 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2636 language_str (entry
.lang
));
2640 deduce_language_from_filename (const char *filename
)
2644 if (filename
!= NULL
)
2645 if ((cp
= strrchr (filename
, '.')) != NULL
)
2647 for (const filename_language
&entry
: filename_language_table
)
2648 if (entry
.ext
== cp
)
2652 return language_unknown
;
2655 /* Allocate and initialize a new symbol table.
2656 CUST is from the result of allocate_compunit_symtab. */
2659 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2661 struct objfile
*objfile
= cust
->objfile
;
2662 struct symtab
*symtab
2663 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2666 = (const char *) bcache (filename
, strlen (filename
) + 1,
2667 objfile
->per_bfd
->filename_cache
);
2668 symtab
->fullname
= NULL
;
2669 symtab
->language
= deduce_language_from_filename (filename
);
2671 /* This can be very verbose with lots of headers.
2672 Only print at higher debug levels. */
2673 if (symtab_create_debug
>= 2)
2675 /* Be a bit clever with debugging messages, and don't print objfile
2676 every time, only when it changes. */
2677 static char *last_objfile_name
= NULL
;
2679 if (last_objfile_name
== NULL
2680 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2682 xfree (last_objfile_name
);
2683 last_objfile_name
= xstrdup (objfile_name (objfile
));
2684 fprintf_unfiltered (gdb_stdlog
,
2685 "Creating one or more symtabs for objfile %s ...\n",
2688 fprintf_unfiltered (gdb_stdlog
,
2689 "Created symtab %s for module %s.\n",
2690 host_address_to_string (symtab
), filename
);
2693 /* Add it to CUST's list of symtabs. */
2694 if (cust
->filetabs
== NULL
)
2696 cust
->filetabs
= symtab
;
2697 cust
->last_filetab
= symtab
;
2701 cust
->last_filetab
->next
= symtab
;
2702 cust
->last_filetab
= symtab
;
2705 /* Backlink to the containing compunit symtab. */
2706 symtab
->compunit_symtab
= cust
;
2711 /* Allocate and initialize a new compunit.
2712 NAME is the name of the main source file, if there is one, or some
2713 descriptive text if there are no source files. */
2715 struct compunit_symtab
*
2716 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2718 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2719 struct compunit_symtab
);
2720 const char *saved_name
;
2722 cu
->objfile
= objfile
;
2724 /* The name we record here is only for display/debugging purposes.
2725 Just save the basename to avoid path issues (too long for display,
2726 relative vs absolute, etc.). */
2727 saved_name
= lbasename (name
);
2729 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2730 strlen (saved_name
));
2732 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2734 if (symtab_create_debug
)
2736 fprintf_unfiltered (gdb_stdlog
,
2737 "Created compunit symtab %s for %s.\n",
2738 host_address_to_string (cu
),
2745 /* Hook CU to the objfile it comes from. */
2748 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2750 cu
->next
= cu
->objfile
->compunit_symtabs
;
2751 cu
->objfile
->compunit_symtabs
= cu
;
2755 /* Reset all data structures in gdb which may contain references to
2756 symbol table data. */
2759 clear_symtab_users (symfile_add_flags add_flags
)
2761 /* Someday, we should do better than this, by only blowing away
2762 the things that really need to be blown. */
2764 /* Clear the "current" symtab first, because it is no longer valid.
2765 breakpoint_re_set may try to access the current symtab. */
2766 clear_current_source_symtab_and_line ();
2769 clear_last_displayed_sal ();
2770 clear_pc_function_cache ();
2771 gdb::observers::new_objfile
.notify (NULL
);
2773 /* Clear globals which might have pointed into a removed objfile.
2774 FIXME: It's not clear which of these are supposed to persist
2775 between expressions and which ought to be reset each time. */
2776 expression_context_block
= NULL
;
2777 innermost_block
.reset ();
2779 /* Varobj may refer to old symbols, perform a cleanup. */
2780 varobj_invalidate ();
2782 /* Now that the various caches have been cleared, we can re_set
2783 our breakpoints without risking it using stale data. */
2784 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2785 breakpoint_re_set ();
2789 clear_symtab_users_cleanup (void *ignore
)
2791 clear_symtab_users (0);
2795 The following code implements an abstraction for debugging overlay sections.
2797 The target model is as follows:
2798 1) The gnu linker will permit multiple sections to be mapped into the
2799 same VMA, each with its own unique LMA (or load address).
2800 2) It is assumed that some runtime mechanism exists for mapping the
2801 sections, one by one, from the load address into the VMA address.
2802 3) This code provides a mechanism for gdb to keep track of which
2803 sections should be considered to be mapped from the VMA to the LMA.
2804 This information is used for symbol lookup, and memory read/write.
2805 For instance, if a section has been mapped then its contents
2806 should be read from the VMA, otherwise from the LMA.
2808 Two levels of debugger support for overlays are available. One is
2809 "manual", in which the debugger relies on the user to tell it which
2810 overlays are currently mapped. This level of support is
2811 implemented entirely in the core debugger, and the information about
2812 whether a section is mapped is kept in the objfile->obj_section table.
2814 The second level of support is "automatic", and is only available if
2815 the target-specific code provides functionality to read the target's
2816 overlay mapping table, and translate its contents for the debugger
2817 (by updating the mapped state information in the obj_section tables).
2819 The interface is as follows:
2821 overlay map <name> -- tell gdb to consider this section mapped
2822 overlay unmap <name> -- tell gdb to consider this section unmapped
2823 overlay list -- list the sections that GDB thinks are mapped
2824 overlay read-target -- get the target's state of what's mapped
2825 overlay off/manual/auto -- set overlay debugging state
2826 Functional interface:
2827 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2828 section, return that section.
2829 find_pc_overlay(pc): find any overlay section that contains
2830 the pc, either in its VMA or its LMA
2831 section_is_mapped(sect): true if overlay is marked as mapped
2832 section_is_overlay(sect): true if section's VMA != LMA
2833 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2834 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2835 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2836 overlay_mapped_address(...): map an address from section's LMA to VMA
2837 overlay_unmapped_address(...): map an address from section's VMA to LMA
2838 symbol_overlayed_address(...): Return a "current" address for symbol:
2839 either in VMA or LMA depending on whether
2840 the symbol's section is currently mapped. */
2842 /* Overlay debugging state: */
2844 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2845 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2847 /* Function: section_is_overlay (SECTION)
2848 Returns true if SECTION has VMA not equal to LMA, ie.
2849 SECTION is loaded at an address different from where it will "run". */
2852 section_is_overlay (struct obj_section
*section
)
2854 if (overlay_debugging
&& section
)
2856 asection
*bfd_section
= section
->the_bfd_section
;
2858 if (bfd_section_lma (abfd
, bfd_section
) != 0
2859 && bfd_section_lma (abfd
, bfd_section
)
2860 != bfd_section_vma (abfd
, bfd_section
))
2867 /* Function: overlay_invalidate_all (void)
2868 Invalidate the mapped state of all overlay sections (mark it as stale). */
2871 overlay_invalidate_all (void)
2873 struct objfile
*objfile
;
2874 struct obj_section
*sect
;
2876 ALL_OBJSECTIONS (objfile
, sect
)
2877 if (section_is_overlay (sect
))
2878 sect
->ovly_mapped
= -1;
2881 /* Function: section_is_mapped (SECTION)
2882 Returns true if section is an overlay, and is currently mapped.
2884 Access to the ovly_mapped flag is restricted to this function, so
2885 that we can do automatic update. If the global flag
2886 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2887 overlay_invalidate_all. If the mapped state of the particular
2888 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2891 section_is_mapped (struct obj_section
*osect
)
2893 struct gdbarch
*gdbarch
;
2895 if (osect
== 0 || !section_is_overlay (osect
))
2898 switch (overlay_debugging
)
2902 return 0; /* overlay debugging off */
2903 case ovly_auto
: /* overlay debugging automatic */
2904 /* Unles there is a gdbarch_overlay_update function,
2905 there's really nothing useful to do here (can't really go auto). */
2906 gdbarch
= get_objfile_arch (osect
->objfile
);
2907 if (gdbarch_overlay_update_p (gdbarch
))
2909 if (overlay_cache_invalid
)
2911 overlay_invalidate_all ();
2912 overlay_cache_invalid
= 0;
2914 if (osect
->ovly_mapped
== -1)
2915 gdbarch_overlay_update (gdbarch
, osect
);
2918 case ovly_on
: /* overlay debugging manual */
2919 return osect
->ovly_mapped
== 1;
2923 /* Function: pc_in_unmapped_range
2924 If PC falls into the lma range of SECTION, return true, else false. */
2927 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2929 if (section_is_overlay (section
))
2931 bfd
*abfd
= section
->objfile
->obfd
;
2932 asection
*bfd_section
= section
->the_bfd_section
;
2934 /* We assume the LMA is relocated by the same offset as the VMA. */
2935 bfd_vma size
= bfd_get_section_size (bfd_section
);
2936 CORE_ADDR offset
= obj_section_offset (section
);
2938 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
2939 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
2946 /* Function: pc_in_mapped_range
2947 If PC falls into the vma range of SECTION, return true, else false. */
2950 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2952 if (section_is_overlay (section
))
2954 if (obj_section_addr (section
) <= pc
2955 && pc
< obj_section_endaddr (section
))
2962 /* Return true if the mapped ranges of sections A and B overlap, false
2966 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
2968 CORE_ADDR a_start
= obj_section_addr (a
);
2969 CORE_ADDR a_end
= obj_section_endaddr (a
);
2970 CORE_ADDR b_start
= obj_section_addr (b
);
2971 CORE_ADDR b_end
= obj_section_endaddr (b
);
2973 return (a_start
< b_end
&& b_start
< a_end
);
2976 /* Function: overlay_unmapped_address (PC, SECTION)
2977 Returns the address corresponding to PC in the unmapped (load) range.
2978 May be the same as PC. */
2981 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
2983 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
2985 asection
*bfd_section
= section
->the_bfd_section
;
2987 return pc
+ bfd_section_lma (abfd
, bfd_section
)
2988 - bfd_section_vma (abfd
, bfd_section
);
2994 /* Function: overlay_mapped_address (PC, SECTION)
2995 Returns the address corresponding to PC in the mapped (runtime) range.
2996 May be the same as PC. */
2999 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3001 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3003 asection
*bfd_section
= section
->the_bfd_section
;
3005 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3006 - bfd_section_lma (abfd
, bfd_section
);
3012 /* Function: symbol_overlayed_address
3013 Return one of two addresses (relative to the VMA or to the LMA),
3014 depending on whether the section is mapped or not. */
3017 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3019 if (overlay_debugging
)
3021 /* If the symbol has no section, just return its regular address. */
3024 /* If the symbol's section is not an overlay, just return its
3026 if (!section_is_overlay (section
))
3028 /* If the symbol's section is mapped, just return its address. */
3029 if (section_is_mapped (section
))
3032 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3033 * then return its LOADED address rather than its vma address!!
3035 return overlay_unmapped_address (address
, section
);
3040 /* Function: find_pc_overlay (PC)
3041 Return the best-match overlay section for PC:
3042 If PC matches a mapped overlay section's VMA, return that section.
3043 Else if PC matches an unmapped section's VMA, return that section.
3044 Else if PC matches an unmapped section's LMA, return that section. */
3046 struct obj_section
*
3047 find_pc_overlay (CORE_ADDR pc
)
3049 struct objfile
*objfile
;
3050 struct obj_section
*osect
, *best_match
= NULL
;
3052 if (overlay_debugging
)
3054 ALL_OBJSECTIONS (objfile
, osect
)
3055 if (section_is_overlay (osect
))
3057 if (pc_in_mapped_range (pc
, osect
))
3059 if (section_is_mapped (osect
))
3064 else if (pc_in_unmapped_range (pc
, osect
))
3071 /* Function: find_pc_mapped_section (PC)
3072 If PC falls into the VMA address range of an overlay section that is
3073 currently marked as MAPPED, return that section. Else return NULL. */
3075 struct obj_section
*
3076 find_pc_mapped_section (CORE_ADDR pc
)
3078 struct objfile
*objfile
;
3079 struct obj_section
*osect
;
3081 if (overlay_debugging
)
3083 ALL_OBJSECTIONS (objfile
, osect
)
3084 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3091 /* Function: list_overlays_command
3092 Print a list of mapped sections and their PC ranges. */
3095 list_overlays_command (const char *args
, int from_tty
)
3098 struct objfile
*objfile
;
3099 struct obj_section
*osect
;
3101 if (overlay_debugging
)
3103 ALL_OBJSECTIONS (objfile
, osect
)
3104 if (section_is_mapped (osect
))
3106 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3111 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3112 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3113 size
= bfd_get_section_size (osect
->the_bfd_section
);
3114 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3116 printf_filtered ("Section %s, loaded at ", name
);
3117 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3118 puts_filtered (" - ");
3119 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3120 printf_filtered (", mapped at ");
3121 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3122 puts_filtered (" - ");
3123 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3124 puts_filtered ("\n");
3130 printf_filtered (_("No sections are mapped.\n"));
3133 /* Function: map_overlay_command
3134 Mark the named section as mapped (ie. residing at its VMA address). */
3137 map_overlay_command (const char *args
, int from_tty
)
3139 struct objfile
*objfile
, *objfile2
;
3140 struct obj_section
*sec
, *sec2
;
3142 if (!overlay_debugging
)
3143 error (_("Overlay debugging not enabled. Use "
3144 "either the 'overlay auto' or\n"
3145 "the 'overlay manual' command."));
3147 if (args
== 0 || *args
== 0)
3148 error (_("Argument required: name of an overlay section"));
3150 /* First, find a section matching the user supplied argument. */
3151 ALL_OBJSECTIONS (objfile
, sec
)
3152 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3154 /* Now, check to see if the section is an overlay. */
3155 if (!section_is_overlay (sec
))
3156 continue; /* not an overlay section */
3158 /* Mark the overlay as "mapped". */
3159 sec
->ovly_mapped
= 1;
3161 /* Next, make a pass and unmap any sections that are
3162 overlapped by this new section: */
3163 ALL_OBJSECTIONS (objfile2
, sec2
)
3164 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3167 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3168 bfd_section_name (objfile
->obfd
,
3169 sec2
->the_bfd_section
));
3170 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3174 error (_("No overlay section called %s"), args
);
3177 /* Function: unmap_overlay_command
3178 Mark the overlay section as unmapped
3179 (ie. resident in its LMA address range, rather than the VMA range). */
3182 unmap_overlay_command (const char *args
, int from_tty
)
3184 struct objfile
*objfile
;
3185 struct obj_section
*sec
= NULL
;
3187 if (!overlay_debugging
)
3188 error (_("Overlay debugging not enabled. "
3189 "Use either the 'overlay auto' or\n"
3190 "the 'overlay manual' command."));
3192 if (args
== 0 || *args
== 0)
3193 error (_("Argument required: name of an overlay section"));
3195 /* First, find a section matching the user supplied argument. */
3196 ALL_OBJSECTIONS (objfile
, sec
)
3197 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3199 if (!sec
->ovly_mapped
)
3200 error (_("Section %s is not mapped"), args
);
3201 sec
->ovly_mapped
= 0;
3204 error (_("No overlay section called %s"), args
);
3207 /* Function: overlay_auto_command
3208 A utility command to turn on overlay debugging.
3209 Possibly this should be done via a set/show command. */
3212 overlay_auto_command (const char *args
, int from_tty
)
3214 overlay_debugging
= ovly_auto
;
3215 enable_overlay_breakpoints ();
3217 printf_unfiltered (_("Automatic overlay debugging enabled."));
3220 /* Function: overlay_manual_command
3221 A utility command to turn on overlay debugging.
3222 Possibly this should be done via a set/show command. */
3225 overlay_manual_command (const char *args
, int from_tty
)
3227 overlay_debugging
= ovly_on
;
3228 disable_overlay_breakpoints ();
3230 printf_unfiltered (_("Overlay debugging enabled."));
3233 /* Function: overlay_off_command
3234 A utility command to turn on overlay debugging.
3235 Possibly this should be done via a set/show command. */
3238 overlay_off_command (const char *args
, int from_tty
)
3240 overlay_debugging
= ovly_off
;
3241 disable_overlay_breakpoints ();
3243 printf_unfiltered (_("Overlay debugging disabled."));
3247 overlay_load_command (const char *args
, int from_tty
)
3249 struct gdbarch
*gdbarch
= get_current_arch ();
3251 if (gdbarch_overlay_update_p (gdbarch
))
3252 gdbarch_overlay_update (gdbarch
, NULL
);
3254 error (_("This target does not know how to read its overlay state."));
3257 /* Function: overlay_command
3258 A place-holder for a mis-typed command. */
3260 /* Command list chain containing all defined "overlay" subcommands. */
3261 static struct cmd_list_element
*overlaylist
;
3264 overlay_command (const char *args
, int from_tty
)
3267 ("\"overlay\" must be followed by the name of an overlay command.\n");
3268 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3271 /* Target Overlays for the "Simplest" overlay manager:
3273 This is GDB's default target overlay layer. It works with the
3274 minimal overlay manager supplied as an example by Cygnus. The
3275 entry point is via a function pointer "gdbarch_overlay_update",
3276 so targets that use a different runtime overlay manager can
3277 substitute their own overlay_update function and take over the
3280 The overlay_update function pokes around in the target's data structures
3281 to see what overlays are mapped, and updates GDB's overlay mapping with
3284 In this simple implementation, the target data structures are as follows:
3285 unsigned _novlys; /# number of overlay sections #/
3286 unsigned _ovly_table[_novlys][4] = {
3287 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3288 {..., ..., ..., ...},
3290 unsigned _novly_regions; /# number of overlay regions #/
3291 unsigned _ovly_region_table[_novly_regions][3] = {
3292 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3295 These functions will attempt to update GDB's mappedness state in the
3296 symbol section table, based on the target's mappedness state.
3298 To do this, we keep a cached copy of the target's _ovly_table, and
3299 attempt to detect when the cached copy is invalidated. The main
3300 entry point is "simple_overlay_update(SECT), which looks up SECT in
3301 the cached table and re-reads only the entry for that section from
3302 the target (whenever possible). */
3304 /* Cached, dynamically allocated copies of the target data structures: */
3305 static unsigned (*cache_ovly_table
)[4] = 0;
3306 static unsigned cache_novlys
= 0;
3307 static CORE_ADDR cache_ovly_table_base
= 0;
3310 VMA
, OSIZE
, LMA
, MAPPED
3313 /* Throw away the cached copy of _ovly_table. */
3316 simple_free_overlay_table (void)
3318 if (cache_ovly_table
)
3319 xfree (cache_ovly_table
);
3321 cache_ovly_table
= NULL
;
3322 cache_ovly_table_base
= 0;
3325 /* Read an array of ints of size SIZE from the target into a local buffer.
3326 Convert to host order. int LEN is number of ints. */
3329 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3330 int len
, int size
, enum bfd_endian byte_order
)
3332 /* FIXME (alloca): Not safe if array is very large. */
3333 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3336 read_memory (memaddr
, buf
, len
* size
);
3337 for (i
= 0; i
< len
; i
++)
3338 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3341 /* Find and grab a copy of the target _ovly_table
3342 (and _novlys, which is needed for the table's size). */
3345 simple_read_overlay_table (void)
3347 struct bound_minimal_symbol novlys_msym
;
3348 struct bound_minimal_symbol ovly_table_msym
;
3349 struct gdbarch
*gdbarch
;
3351 enum bfd_endian byte_order
;
3353 simple_free_overlay_table ();
3354 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3355 if (! novlys_msym
.minsym
)
3357 error (_("Error reading inferior's overlay table: "
3358 "couldn't find `_novlys' variable\n"
3359 "in inferior. Use `overlay manual' mode."));
3363 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3364 if (! ovly_table_msym
.minsym
)
3366 error (_("Error reading inferior's overlay table: couldn't find "
3367 "`_ovly_table' array\n"
3368 "in inferior. Use `overlay manual' mode."));
3372 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3373 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3374 byte_order
= gdbarch_byte_order (gdbarch
);
3376 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3379 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3380 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3381 read_target_long_array (cache_ovly_table_base
,
3382 (unsigned int *) cache_ovly_table
,
3383 cache_novlys
* 4, word_size
, byte_order
);
3385 return 1; /* SUCCESS */
3388 /* Function: simple_overlay_update_1
3389 A helper function for simple_overlay_update. Assuming a cached copy
3390 of _ovly_table exists, look through it to find an entry whose vma,
3391 lma and size match those of OSECT. Re-read the entry and make sure
3392 it still matches OSECT (else the table may no longer be valid).
3393 Set OSECT's mapped state to match the entry. Return: 1 for
3394 success, 0 for failure. */
3397 simple_overlay_update_1 (struct obj_section
*osect
)
3400 asection
*bsect
= osect
->the_bfd_section
;
3401 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3402 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3403 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3405 for (i
= 0; i
< cache_novlys
; i
++)
3406 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3407 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3409 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3410 (unsigned int *) cache_ovly_table
[i
],
3411 4, word_size
, byte_order
);
3412 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3413 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3415 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3418 else /* Warning! Warning! Target's ovly table has changed! */
3424 /* Function: simple_overlay_update
3425 If OSECT is NULL, then update all sections' mapped state
3426 (after re-reading the entire target _ovly_table).
3427 If OSECT is non-NULL, then try to find a matching entry in the
3428 cached ovly_table and update only OSECT's mapped state.
3429 If a cached entry can't be found or the cache isn't valid, then
3430 re-read the entire cache, and go ahead and update all sections. */
3433 simple_overlay_update (struct obj_section
*osect
)
3435 struct objfile
*objfile
;
3437 /* Were we given an osect to look up? NULL means do all of them. */
3439 /* Have we got a cached copy of the target's overlay table? */
3440 if (cache_ovly_table
!= NULL
)
3442 /* Does its cached location match what's currently in the
3444 struct bound_minimal_symbol minsym
3445 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3447 if (minsym
.minsym
== NULL
)
3448 error (_("Error reading inferior's overlay table: couldn't "
3449 "find `_ovly_table' array\n"
3450 "in inferior. Use `overlay manual' mode."));
3452 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3453 /* Then go ahead and try to look up this single section in
3455 if (simple_overlay_update_1 (osect
))
3456 /* Found it! We're done. */
3460 /* Cached table no good: need to read the entire table anew.
3461 Or else we want all the sections, in which case it's actually
3462 more efficient to read the whole table in one block anyway. */
3464 if (! simple_read_overlay_table ())
3467 /* Now may as well update all sections, even if only one was requested. */
3468 ALL_OBJSECTIONS (objfile
, osect
)
3469 if (section_is_overlay (osect
))
3472 asection
*bsect
= osect
->the_bfd_section
;
3474 for (i
= 0; i
< cache_novlys
; i
++)
3475 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3476 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3477 { /* obj_section matches i'th entry in ovly_table. */
3478 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3479 break; /* finished with inner for loop: break out. */
3484 /* Set the output sections and output offsets for section SECTP in
3485 ABFD. The relocation code in BFD will read these offsets, so we
3486 need to be sure they're initialized. We map each section to itself,
3487 with no offset; this means that SECTP->vma will be honored. */
3490 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3492 sectp
->output_section
= sectp
;
3493 sectp
->output_offset
= 0;
3496 /* Default implementation for sym_relocate. */
3499 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3502 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3504 bfd
*abfd
= sectp
->owner
;
3506 /* We're only interested in sections with relocation
3508 if ((sectp
->flags
& SEC_RELOC
) == 0)
3511 /* We will handle section offsets properly elsewhere, so relocate as if
3512 all sections begin at 0. */
3513 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3515 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3518 /* Relocate the contents of a debug section SECTP in ABFD. The
3519 contents are stored in BUF if it is non-NULL, or returned in a
3520 malloc'd buffer otherwise.
3522 For some platforms and debug info formats, shared libraries contain
3523 relocations against the debug sections (particularly for DWARF-2;
3524 one affected platform is PowerPC GNU/Linux, although it depends on
3525 the version of the linker in use). Also, ELF object files naturally
3526 have unresolved relocations for their debug sections. We need to apply
3527 the relocations in order to get the locations of symbols correct.
3528 Another example that may require relocation processing, is the
3529 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3533 symfile_relocate_debug_section (struct objfile
*objfile
,
3534 asection
*sectp
, bfd_byte
*buf
)
3536 gdb_assert (objfile
->sf
->sym_relocate
);
3538 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3541 struct symfile_segment_data
*
3542 get_symfile_segment_data (bfd
*abfd
)
3544 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3549 return sf
->sym_segments (abfd
);
3553 free_symfile_segment_data (struct symfile_segment_data
*data
)
3555 xfree (data
->segment_bases
);
3556 xfree (data
->segment_sizes
);
3557 xfree (data
->segment_info
);
3562 - DATA, containing segment addresses from the object file ABFD, and
3563 the mapping from ABFD's sections onto the segments that own them,
3565 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3566 segment addresses reported by the target,
3567 store the appropriate offsets for each section in OFFSETS.
3569 If there are fewer entries in SEGMENT_BASES than there are segments
3570 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3572 If there are more entries, then ignore the extra. The target may
3573 not be able to distinguish between an empty data segment and a
3574 missing data segment; a missing text segment is less plausible. */
3577 symfile_map_offsets_to_segments (bfd
*abfd
,
3578 const struct symfile_segment_data
*data
,
3579 struct section_offsets
*offsets
,
3580 int num_segment_bases
,
3581 const CORE_ADDR
*segment_bases
)
3586 /* It doesn't make sense to call this function unless you have some
3587 segment base addresses. */
3588 gdb_assert (num_segment_bases
> 0);
3590 /* If we do not have segment mappings for the object file, we
3591 can not relocate it by segments. */
3592 gdb_assert (data
!= NULL
);
3593 gdb_assert (data
->num_segments
> 0);
3595 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3597 int which
= data
->segment_info
[i
];
3599 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3601 /* Don't bother computing offsets for sections that aren't
3602 loaded as part of any segment. */
3606 /* Use the last SEGMENT_BASES entry as the address of any extra
3607 segments mentioned in DATA->segment_info. */
3608 if (which
> num_segment_bases
)
3609 which
= num_segment_bases
;
3611 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3612 - data
->segment_bases
[which
- 1]);
3619 symfile_find_segment_sections (struct objfile
*objfile
)
3621 bfd
*abfd
= objfile
->obfd
;
3624 struct symfile_segment_data
*data
;
3626 data
= get_symfile_segment_data (objfile
->obfd
);
3630 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3632 free_symfile_segment_data (data
);
3636 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3638 int which
= data
->segment_info
[i
];
3642 if (objfile
->sect_index_text
== -1)
3643 objfile
->sect_index_text
= sect
->index
;
3645 if (objfile
->sect_index_rodata
== -1)
3646 objfile
->sect_index_rodata
= sect
->index
;
3648 else if (which
== 2)
3650 if (objfile
->sect_index_data
== -1)
3651 objfile
->sect_index_data
= sect
->index
;
3653 if (objfile
->sect_index_bss
== -1)
3654 objfile
->sect_index_bss
= sect
->index
;
3658 free_symfile_segment_data (data
);
3661 /* Listen for free_objfile events. */
3664 symfile_free_objfile (struct objfile
*objfile
)
3666 /* Remove the target sections owned by this objfile. */
3667 if (objfile
!= NULL
)
3668 remove_target_sections ((void *) objfile
);
3671 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3672 Expand all symtabs that match the specified criteria.
3673 See quick_symbol_functions.expand_symtabs_matching for details. */
3676 expand_symtabs_matching
3677 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3678 const lookup_name_info
&lookup_name
,
3679 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3680 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3681 enum search_domain kind
)
3683 struct objfile
*objfile
;
3685 ALL_OBJFILES (objfile
)
3688 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3691 expansion_notify
, kind
);
3695 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3696 Map function FUN over every file.
3697 See quick_symbol_functions.map_symbol_filenames for details. */
3700 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3703 struct objfile
*objfile
;
3705 ALL_OBJFILES (objfile
)
3708 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3715 namespace selftests
{
3716 namespace filename_language
{
3718 static void test_filename_language ()
3720 /* This test messes up the filename_language_table global. */
3721 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3723 /* Test deducing an unknown extension. */
3724 language lang
= deduce_language_from_filename ("myfile.blah");
3725 SELF_CHECK (lang
== language_unknown
);
3727 /* Test deducing a known extension. */
3728 lang
= deduce_language_from_filename ("myfile.c");
3729 SELF_CHECK (lang
== language_c
);
3731 /* Test adding a new extension using the internal API. */
3732 add_filename_language (".blah", language_pascal
);
3733 lang
= deduce_language_from_filename ("myfile.blah");
3734 SELF_CHECK (lang
== language_pascal
);
3738 test_set_ext_lang_command ()
3740 /* This test messes up the filename_language_table global. */
3741 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3743 /* Confirm that the .hello extension is not known. */
3744 language lang
= deduce_language_from_filename ("cake.hello");
3745 SELF_CHECK (lang
== language_unknown
);
3747 /* Test adding a new extension using the CLI command. */
3748 gdb::unique_xmalloc_ptr
<char> args_holder (xstrdup (".hello rust"));
3749 ext_args
= args_holder
.get ();
3750 set_ext_lang_command (NULL
, 1, NULL
);
3752 lang
= deduce_language_from_filename ("cake.hello");
3753 SELF_CHECK (lang
== language_rust
);
3755 /* Test overriding an existing extension using the CLI command. */
3756 int size_before
= filename_language_table
.size ();
3757 args_holder
.reset (xstrdup (".hello pascal"));
3758 ext_args
= args_holder
.get ();
3759 set_ext_lang_command (NULL
, 1, NULL
);
3760 int size_after
= filename_language_table
.size ();
3762 lang
= deduce_language_from_filename ("cake.hello");
3763 SELF_CHECK (lang
== language_pascal
);
3764 SELF_CHECK (size_before
== size_after
);
3767 } /* namespace filename_language */
3768 } /* namespace selftests */
3770 #endif /* GDB_SELF_TEST */
3773 _initialize_symfile (void)
3775 struct cmd_list_element
*c
;
3777 gdb::observers::free_objfile
.attach (symfile_free_objfile
);
3779 #define READNOW_READNEVER_HELP \
3780 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3781 immediately. This makes the command slower, but may make future operations\n\
3783 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3784 symbolic debug information."
3786 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3787 Load symbol table from executable file FILE.\n\
3788 Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
3789 OFF is an optional offset which is added to each section address.\n\
3790 The `file' command can also load symbol tables, as well as setting the file\n\
3791 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3792 set_cmd_completer (c
, filename_completer
);
3794 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3795 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3796 Usage: add-symbol-file FILE ADDR [-readnow | -readnever | \
3797 -s SECT-NAME SECT-ADDR]...\n\
3798 ADDR is the starting address of the file's text.\n\
3799 Each '-s' argument provides a section name and address, and\n\
3800 should be specified if the data and bss segments are not contiguous\n\
3801 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n"
3802 READNOW_READNEVER_HELP
),
3804 set_cmd_completer (c
, filename_completer
);
3806 c
= add_cmd ("remove-symbol-file", class_files
,
3807 remove_symbol_file_command
, _("\
3808 Remove a symbol file added via the add-symbol-file command.\n\
3809 Usage: remove-symbol-file FILENAME\n\
3810 remove-symbol-file -a ADDRESS\n\
3811 The file to remove can be identified by its filename or by an address\n\
3812 that lies within the boundaries of this symbol file in memory."),
3815 c
= add_cmd ("load", class_files
, load_command
, _("\
3816 Dynamically load FILE into the running program, and record its symbols\n\
3817 for access from GDB.\n\
3818 Usage: load [FILE] [OFFSET]\n\
3819 An optional load OFFSET may also be given as a literal address.\n\
3820 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3821 on its own."), &cmdlist
);
3822 set_cmd_completer (c
, filename_completer
);
3824 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3825 _("Commands for debugging overlays."), &overlaylist
,
3826 "overlay ", 0, &cmdlist
);
3828 add_com_alias ("ovly", "overlay", class_alias
, 1);
3829 add_com_alias ("ov", "overlay", class_alias
, 1);
3831 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3832 _("Assert that an overlay section is mapped."), &overlaylist
);
3834 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3835 _("Assert that an overlay section is unmapped."), &overlaylist
);
3837 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3838 _("List mappings of overlay sections."), &overlaylist
);
3840 add_cmd ("manual", class_support
, overlay_manual_command
,
3841 _("Enable overlay debugging."), &overlaylist
);
3842 add_cmd ("off", class_support
, overlay_off_command
,
3843 _("Disable overlay debugging."), &overlaylist
);
3844 add_cmd ("auto", class_support
, overlay_auto_command
,
3845 _("Enable automatic overlay debugging."), &overlaylist
);
3846 add_cmd ("load-target", class_support
, overlay_load_command
,
3847 _("Read the overlay mapping state from the target."), &overlaylist
);
3849 /* Filename extension to source language lookup table: */
3850 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3852 Set mapping between filename extension and source language."), _("\
3853 Show mapping between filename extension and source language."), _("\
3854 Usage: set extension-language .foo bar"),
3855 set_ext_lang_command
,
3857 &setlist
, &showlist
);
3859 add_info ("extensions", info_ext_lang_command
,
3860 _("All filename extensions associated with a source language."));
3862 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3863 &debug_file_directory
, _("\
3864 Set the directories where separate debug symbols are searched for."), _("\
3865 Show the directories where separate debug symbols are searched for."), _("\
3866 Separate debug symbols are first searched for in the same\n\
3867 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3868 and lastly at the path of the directory of the binary with\n\
3869 each global debug-file-directory component prepended."),
3871 show_debug_file_directory
,
3872 &setlist
, &showlist
);
3874 add_setshow_enum_cmd ("symbol-loading", no_class
,
3875 print_symbol_loading_enums
, &print_symbol_loading
,
3877 Set printing of symbol loading messages."), _("\
3878 Show printing of symbol loading messages."), _("\
3879 off == turn all messages off\n\
3880 brief == print messages for the executable,\n\
3881 and brief messages for shared libraries\n\
3882 full == print messages for the executable,\n\
3883 and messages for each shared library."),
3886 &setprintlist
, &showprintlist
);
3888 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3889 &separate_debug_file_debug
, _("\
3890 Set printing of separate debug info file search debug."), _("\
3891 Show printing of separate debug info file search debug."), _("\
3892 When on, GDB prints the searched locations while looking for separate debug \
3893 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
3896 selftests::register_test
3897 ("filename_language", selftests::filename_language::test_filename_language
);
3898 selftests::register_test
3899 ("set_ext_lang_command",
3900 selftests::filename_language::test_set_ext_lang_command
);