1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2020 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/tilde.h"
49 #include "observable.h"
51 #include "parser-defs.h"
58 #include "cli/cli-utils.h"
59 #include "gdbsupport/byte-vector.h"
60 #include "gdbsupport/pathstuff.h"
61 #include "gdbsupport/selftest.h"
62 #include "cli/cli-style.h"
63 #include "gdbsupport/forward-scope-exit.h"
65 #include <sys/types.h>
74 int (*deprecated_ui_load_progress_hook
) (const char *section
,
76 void (*deprecated_show_load_progress
) (const char *section
,
77 unsigned long section_sent
,
78 unsigned long section_size
,
79 unsigned long total_sent
,
80 unsigned long total_size
);
81 void (*deprecated_pre_add_symbol_hook
) (const char *);
82 void (*deprecated_post_add_symbol_hook
) (void);
84 using clear_symtab_users_cleanup
85 = FORWARD_SCOPE_EXIT (clear_symtab_users
);
87 /* Global variables owned by this file. */
88 int readnow_symbol_files
; /* Read full symbols immediately. */
89 int readnever_symbol_files
; /* Never read full symbols. */
91 /* Functions this file defines. */
93 static void symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
94 objfile_flags flags
, CORE_ADDR reloff
);
96 static const struct sym_fns
*find_sym_fns (bfd
*);
98 static void overlay_invalidate_all (void);
100 static void simple_free_overlay_table (void);
102 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
105 static int simple_read_overlay_table (void);
107 static int simple_overlay_update_1 (struct obj_section
*);
109 static void symfile_find_segment_sections (struct objfile
*objfile
);
111 /* List of all available sym_fns. On gdb startup, each object file reader
112 calls add_symtab_fns() to register information on each format it is
115 struct registered_sym_fns
117 registered_sym_fns (bfd_flavour sym_flavour_
, const struct sym_fns
*sym_fns_
)
118 : sym_flavour (sym_flavour_
), sym_fns (sym_fns_
)
121 /* BFD flavour that we handle. */
122 enum bfd_flavour sym_flavour
;
124 /* The "vtable" of symbol functions. */
125 const struct sym_fns
*sym_fns
;
128 static std::vector
<registered_sym_fns
> symtab_fns
;
130 /* Values for "set print symbol-loading". */
132 const char print_symbol_loading_off
[] = "off";
133 const char print_symbol_loading_brief
[] = "brief";
134 const char print_symbol_loading_full
[] = "full";
135 static const char *print_symbol_loading_enums
[] =
137 print_symbol_loading_off
,
138 print_symbol_loading_brief
,
139 print_symbol_loading_full
,
142 static const char *print_symbol_loading
= print_symbol_loading_full
;
146 bool auto_solib_add
= true;
149 /* Return non-zero if symbol-loading messages should be printed.
150 FROM_TTY is the standard from_tty argument to gdb commands.
151 If EXEC is non-zero the messages are for the executable.
152 Otherwise, messages are for shared libraries.
153 If FULL is non-zero then the caller is printing a detailed message.
154 E.g., the message includes the shared library name.
155 Otherwise, the caller is printing a brief "summary" message. */
158 print_symbol_loading_p (int from_tty
, int exec
, int full
)
160 if (!from_tty
&& !info_verbose
)
165 /* We don't check FULL for executables, there are few such
166 messages, therefore brief == full. */
167 return print_symbol_loading
!= print_symbol_loading_off
;
170 return print_symbol_loading
== print_symbol_loading_full
;
171 return print_symbol_loading
== print_symbol_loading_brief
;
174 /* True if we are reading a symbol table. */
176 int currently_reading_symtab
= 0;
178 /* Increment currently_reading_symtab and return a cleanup that can be
179 used to decrement it. */
181 scoped_restore_tmpl
<int>
182 increment_reading_symtab (void)
184 gdb_assert (currently_reading_symtab
>= 0);
185 return make_scoped_restore (¤tly_reading_symtab
,
186 currently_reading_symtab
+ 1);
189 /* Remember the lowest-addressed loadable section we've seen.
190 This function is called via bfd_map_over_sections.
192 In case of equal vmas, the section with the largest size becomes the
193 lowest-addressed loadable section.
195 If the vmas and sizes are equal, the last section is considered the
196 lowest-addressed loadable section. */
199 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
201 asection
**lowest
= (asection
**) obj
;
203 if (0 == (bfd_section_flags (sect
) & (SEC_ALLOC
| SEC_LOAD
)))
206 *lowest
= sect
; /* First loadable section */
207 else if (bfd_section_vma (*lowest
) > bfd_section_vma (sect
))
208 *lowest
= sect
; /* A lower loadable section */
209 else if (bfd_section_vma (*lowest
) == bfd_section_vma (sect
)
210 && (bfd_section_size (*lowest
) <= bfd_section_size (sect
)))
214 /* Build (allocate and populate) a section_addr_info struct from
215 an existing section table. */
218 build_section_addr_info_from_section_table (const struct target_section
*start
,
219 const struct target_section
*end
)
221 const struct target_section
*stp
;
223 section_addr_info sap
;
225 for (stp
= start
; stp
!= end
; stp
++)
227 struct bfd_section
*asect
= stp
->the_bfd_section
;
228 bfd
*abfd
= asect
->owner
;
230 if (bfd_section_flags (asect
) & (SEC_ALLOC
| SEC_LOAD
)
231 && sap
.size () < end
- start
)
232 sap
.emplace_back (stp
->addr
,
233 bfd_section_name (asect
),
234 gdb_bfd_section_index (abfd
, asect
));
240 /* Create a section_addr_info from section offsets in ABFD. */
242 static section_addr_info
243 build_section_addr_info_from_bfd (bfd
*abfd
)
245 struct bfd_section
*sec
;
247 section_addr_info sap
;
248 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
249 if (bfd_section_flags (sec
) & (SEC_ALLOC
| SEC_LOAD
))
250 sap
.emplace_back (bfd_section_vma (sec
),
251 bfd_section_name (sec
),
252 gdb_bfd_section_index (abfd
, sec
));
257 /* Create a section_addr_info from section offsets in OBJFILE. */
260 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
264 /* Before reread_symbols gets rewritten it is not safe to call:
265 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
267 section_addr_info sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
268 for (i
= 0; i
< sap
.size (); i
++)
270 int sectindex
= sap
[i
].sectindex
;
272 sap
[i
].addr
+= objfile
->section_offsets
[sectindex
];
277 /* Initialize OBJFILE's sect_index_* members. */
280 init_objfile_sect_indices (struct objfile
*objfile
)
285 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
287 objfile
->sect_index_text
= sect
->index
;
289 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
291 objfile
->sect_index_data
= sect
->index
;
293 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
295 objfile
->sect_index_bss
= sect
->index
;
297 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
299 objfile
->sect_index_rodata
= sect
->index
;
301 /* This is where things get really weird... We MUST have valid
302 indices for the various sect_index_* members or gdb will abort.
303 So if for example, there is no ".text" section, we have to
304 accomodate that. First, check for a file with the standard
305 one or two segments. */
307 symfile_find_segment_sections (objfile
);
309 /* Except when explicitly adding symbol files at some address,
310 section_offsets contains nothing but zeros, so it doesn't matter
311 which slot in section_offsets the individual sect_index_* members
312 index into. So if they are all zero, it is safe to just point
313 all the currently uninitialized indices to the first slot. But
314 beware: if this is the main executable, it may be relocated
315 later, e.g. by the remote qOffsets packet, and then this will
316 be wrong! That's why we try segments first. */
318 for (i
= 0; i
< objfile
->section_offsets
.size (); i
++)
320 if (objfile
->section_offsets
[i
] != 0)
325 if (i
== objfile
->section_offsets
.size ())
327 if (objfile
->sect_index_text
== -1)
328 objfile
->sect_index_text
= 0;
329 if (objfile
->sect_index_data
== -1)
330 objfile
->sect_index_data
= 0;
331 if (objfile
->sect_index_bss
== -1)
332 objfile
->sect_index_bss
= 0;
333 if (objfile
->sect_index_rodata
== -1)
334 objfile
->sect_index_rodata
= 0;
338 /* The arguments to place_section. */
340 struct place_section_arg
342 section_offsets
*offsets
;
346 /* Find a unique offset to use for loadable section SECT if
347 the user did not provide an offset. */
350 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
352 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
353 section_offsets
&offsets
= *arg
->offsets
;
354 CORE_ADDR start_addr
;
356 ULONGEST align
= ((ULONGEST
) 1) << bfd_section_alignment (sect
);
358 /* We are only interested in allocated sections. */
359 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
362 /* If the user specified an offset, honor it. */
363 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
366 /* Otherwise, let's try to find a place for the section. */
367 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
374 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
376 int indx
= cur_sec
->index
;
378 /* We don't need to compare against ourself. */
382 /* We can only conflict with allocated sections. */
383 if ((bfd_section_flags (cur_sec
) & SEC_ALLOC
) == 0)
386 /* If the section offset is 0, either the section has not been placed
387 yet, or it was the lowest section placed (in which case LOWEST
388 will be past its end). */
389 if (offsets
[indx
] == 0)
392 /* If this section would overlap us, then we must move up. */
393 if (start_addr
+ bfd_section_size (sect
) > offsets
[indx
]
394 && start_addr
< offsets
[indx
] + bfd_section_size (cur_sec
))
396 start_addr
= offsets
[indx
] + bfd_section_size (cur_sec
);
397 start_addr
= (start_addr
+ align
- 1) & -align
;
402 /* Otherwise, we appear to be OK. So far. */
407 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
408 arg
->lowest
= start_addr
+ bfd_section_size (sect
);
411 /* Store section_addr_info as prepared (made relative and with SECTINDEX
412 filled-in) by addr_info_make_relative into SECTION_OFFSETS. */
415 relative_addr_info_to_section_offsets (section_offsets
§ion_offsets
,
416 const section_addr_info
&addrs
)
420 section_offsets
.assign (section_offsets
.size (), 0);
422 /* Now calculate offsets for section that were specified by the caller. */
423 for (i
= 0; i
< addrs
.size (); i
++)
425 const struct other_sections
*osp
;
428 if (osp
->sectindex
== -1)
431 /* Record all sections in offsets. */
432 /* The section_offsets in the objfile are here filled in using
434 section_offsets
[osp
->sectindex
] = osp
->addr
;
438 /* Transform section name S for a name comparison. prelink can split section
439 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
440 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
441 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
442 (`.sbss') section has invalid (increased) virtual address. */
445 addr_section_name (const char *s
)
447 if (strcmp (s
, ".dynbss") == 0)
449 if (strcmp (s
, ".sdynbss") == 0)
455 /* std::sort comparator for addrs_section_sort. Sort entries in
456 ascending order by their (name, sectindex) pair. sectindex makes
457 the sort by name stable. */
460 addrs_section_compar (const struct other_sections
*a
,
461 const struct other_sections
*b
)
465 retval
= strcmp (addr_section_name (a
->name
.c_str ()),
466 addr_section_name (b
->name
.c_str ()));
470 return a
->sectindex
< b
->sectindex
;
473 /* Provide sorted array of pointers to sections of ADDRS. */
475 static std::vector
<const struct other_sections
*>
476 addrs_section_sort (const section_addr_info
&addrs
)
480 std::vector
<const struct other_sections
*> array (addrs
.size ());
481 for (i
= 0; i
< addrs
.size (); i
++)
482 array
[i
] = &addrs
[i
];
484 std::sort (array
.begin (), array
.end (), addrs_section_compar
);
489 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
490 also SECTINDEXes specific to ABFD there. This function can be used to
491 rebase ADDRS to start referencing different BFD than before. */
494 addr_info_make_relative (section_addr_info
*addrs
, bfd
*abfd
)
496 asection
*lower_sect
;
497 CORE_ADDR lower_offset
;
500 /* Find lowest loadable section to be used as starting point for
501 contiguous sections. */
503 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
504 if (lower_sect
== NULL
)
506 warning (_("no loadable sections found in added symbol-file %s"),
507 bfd_get_filename (abfd
));
511 lower_offset
= bfd_section_vma (lower_sect
);
513 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
514 in ABFD. Section names are not unique - there can be multiple sections of
515 the same name. Also the sections of the same name do not have to be
516 adjacent to each other. Some sections may be present only in one of the
517 files. Even sections present in both files do not have to be in the same
520 Use stable sort by name for the sections in both files. Then linearly
521 scan both lists matching as most of the entries as possible. */
523 std::vector
<const struct other_sections
*> addrs_sorted
524 = addrs_section_sort (*addrs
);
526 section_addr_info abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
527 std::vector
<const struct other_sections
*> abfd_addrs_sorted
528 = addrs_section_sort (abfd_addrs
);
530 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
531 ABFD_ADDRS_SORTED. */
533 std::vector
<const struct other_sections
*>
534 addrs_to_abfd_addrs (addrs
->size (), nullptr);
536 std::vector
<const struct other_sections
*>::iterator abfd_sorted_iter
537 = abfd_addrs_sorted
.begin ();
538 for (const other_sections
*sect
: addrs_sorted
)
540 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
542 while (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
543 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
547 if (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
548 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
553 /* Make the found item directly addressable from ADDRS. */
554 index_in_addrs
= sect
- addrs
->data ();
555 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
556 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_sorted_iter
;
558 /* Never use the same ABFD entry twice. */
563 /* Calculate offsets for the loadable sections.
564 FIXME! Sections must be in order of increasing loadable section
565 so that contiguous sections can use the lower-offset!!!
567 Adjust offsets if the segments are not contiguous.
568 If the section is contiguous, its offset should be set to
569 the offset of the highest loadable section lower than it
570 (the loadable section directly below it in memory).
571 this_offset = lower_offset = lower_addr - lower_orig_addr */
573 for (i
= 0; i
< addrs
->size (); i
++)
575 const struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
579 /* This is the index used by BFD. */
580 (*addrs
)[i
].sectindex
= sect
->sectindex
;
582 if ((*addrs
)[i
].addr
!= 0)
584 (*addrs
)[i
].addr
-= sect
->addr
;
585 lower_offset
= (*addrs
)[i
].addr
;
588 (*addrs
)[i
].addr
= lower_offset
;
592 /* addr_section_name transformation is not used for SECT_NAME. */
593 const std::string
§_name
= (*addrs
)[i
].name
;
595 /* This section does not exist in ABFD, which is normally
596 unexpected and we want to issue a warning.
598 However, the ELF prelinker does create a few sections which are
599 marked in the main executable as loadable (they are loaded in
600 memory from the DYNAMIC segment) and yet are not present in
601 separate debug info files. This is fine, and should not cause
602 a warning. Shared libraries contain just the section
603 ".gnu.liblist" but it is not marked as loadable there. There is
604 no other way to identify them than by their name as the sections
605 created by prelink have no special flags.
607 For the sections `.bss' and `.sbss' see addr_section_name. */
609 if (!(sect_name
== ".gnu.liblist"
610 || sect_name
== ".gnu.conflict"
611 || (sect_name
== ".bss"
613 && (*addrs
)[i
- 1].name
== ".dynbss"
614 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
615 || (sect_name
== ".sbss"
617 && (*addrs
)[i
- 1].name
== ".sdynbss"
618 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
619 warning (_("section %s not found in %s"), sect_name
.c_str (),
620 bfd_get_filename (abfd
));
622 (*addrs
)[i
].addr
= 0;
623 (*addrs
)[i
].sectindex
= -1;
628 /* Parse the user's idea of an offset for dynamic linking, into our idea
629 of how to represent it for fast symbol reading. This is the default
630 version of the sym_fns.sym_offsets function for symbol readers that
631 don't need to do anything special. It allocates a section_offsets table
632 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
635 default_symfile_offsets (struct objfile
*objfile
,
636 const section_addr_info
&addrs
)
638 objfile
->section_offsets
.resize (gdb_bfd_count_sections (objfile
->obfd
));
639 relative_addr_info_to_section_offsets (objfile
->section_offsets
, addrs
);
641 /* For relocatable files, all loadable sections will start at zero.
642 The zero is meaningless, so try to pick arbitrary addresses such
643 that no loadable sections overlap. This algorithm is quadratic,
644 but the number of sections in a single object file is generally
646 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
648 struct place_section_arg arg
;
649 bfd
*abfd
= objfile
->obfd
;
652 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
653 /* We do not expect this to happen; just skip this step if the
654 relocatable file has a section with an assigned VMA. */
655 if (bfd_section_vma (cur_sec
) != 0)
660 section_offsets
&offsets
= objfile
->section_offsets
;
662 /* Pick non-overlapping offsets for sections the user did not
664 arg
.offsets
= &objfile
->section_offsets
;
666 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
668 /* Correctly filling in the section offsets is not quite
669 enough. Relocatable files have two properties that
670 (most) shared objects do not:
672 - Their debug information will contain relocations. Some
673 shared libraries do also, but many do not, so this can not
676 - If there are multiple code sections they will be loaded
677 at different relative addresses in memory than they are
678 in the objfile, since all sections in the file will start
681 Because GDB has very limited ability to map from an
682 address in debug info to the correct code section,
683 it relies on adding SECT_OFF_TEXT to things which might be
684 code. If we clear all the section offsets, and set the
685 section VMAs instead, then symfile_relocate_debug_section
686 will return meaningful debug information pointing at the
689 GDB has too many different data structures for section
690 addresses - a bfd, objfile, and so_list all have section
691 tables, as does exec_ops. Some of these could probably
694 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
695 cur_sec
= cur_sec
->next
)
697 if ((bfd_section_flags (cur_sec
) & SEC_ALLOC
) == 0)
700 bfd_set_section_vma (cur_sec
, offsets
[cur_sec
->index
]);
701 exec_set_section_address (bfd_get_filename (abfd
),
703 offsets
[cur_sec
->index
]);
704 offsets
[cur_sec
->index
] = 0;
709 /* Remember the bfd indexes for the .text, .data, .bss and
711 init_objfile_sect_indices (objfile
);
714 /* Divide the file into segments, which are individual relocatable units.
715 This is the default version of the sym_fns.sym_segments function for
716 symbol readers that do not have an explicit representation of segments.
717 It assumes that object files do not have segments, and fully linked
718 files have a single segment. */
720 struct symfile_segment_data
*
721 default_symfile_segments (bfd
*abfd
)
725 struct symfile_segment_data
*data
;
728 /* Relocatable files contain enough information to position each
729 loadable section independently; they should not be relocated
731 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
734 /* Make sure there is at least one loadable section in the file. */
735 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
737 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
745 low
= bfd_section_vma (sect
);
746 high
= low
+ bfd_section_size (sect
);
748 data
= XCNEW (struct symfile_segment_data
);
749 data
->num_segments
= 1;
750 data
->segment_bases
= XCNEW (CORE_ADDR
);
751 data
->segment_sizes
= XCNEW (CORE_ADDR
);
753 num_sections
= bfd_count_sections (abfd
);
754 data
->segment_info
= XCNEWVEC (int, num_sections
);
756 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
760 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
763 vma
= bfd_section_vma (sect
);
766 if (vma
+ bfd_section_size (sect
) > high
)
767 high
= vma
+ bfd_section_size (sect
);
769 data
->segment_info
[i
] = 1;
772 data
->segment_bases
[0] = low
;
773 data
->segment_sizes
[0] = high
- low
;
778 /* This is a convenience function to call sym_read for OBJFILE and
779 possibly force the partial symbols to be read. */
782 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
784 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
785 objfile
->per_bfd
->minsyms_read
= true;
787 /* find_separate_debug_file_in_section should be called only if there is
788 single binary with no existing separate debug info file. */
789 if (!objfile_has_partial_symbols (objfile
)
790 && objfile
->separate_debug_objfile
== NULL
791 && objfile
->separate_debug_objfile_backlink
== NULL
)
793 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
797 /* find_separate_debug_file_in_section uses the same filename for the
798 virtual section-as-bfd like the bfd filename containing the
799 section. Therefore use also non-canonical name form for the same
800 file containing the section. */
801 symbol_file_add_separate (abfd
.get (),
802 bfd_get_filename (abfd
.get ()),
803 add_flags
| SYMFILE_NOT_FILENAME
, objfile
);
806 if ((add_flags
& SYMFILE_NO_READ
) == 0)
807 require_partial_symbols (objfile
, false);
810 /* Initialize entry point information for this objfile. */
813 init_entry_point_info (struct objfile
*objfile
)
815 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
821 /* Save startup file's range of PC addresses to help blockframe.c
822 decide where the bottom of the stack is. */
824 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
826 /* Executable file -- record its entry point so we'll recognize
827 the startup file because it contains the entry point. */
828 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
829 ei
->entry_point_p
= 1;
831 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
832 && bfd_get_start_address (objfile
->obfd
) != 0)
834 /* Some shared libraries may have entry points set and be
835 runnable. There's no clear way to indicate this, so just check
836 for values other than zero. */
837 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
838 ei
->entry_point_p
= 1;
842 /* Examination of non-executable.o files. Short-circuit this stuff. */
843 ei
->entry_point_p
= 0;
846 if (ei
->entry_point_p
)
848 struct obj_section
*osect
;
849 CORE_ADDR entry_point
= ei
->entry_point
;
852 /* Make certain that the address points at real code, and not a
853 function descriptor. */
855 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
857 current_top_target ());
859 /* Remove any ISA markers, so that this matches entries in the
862 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
865 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
867 struct bfd_section
*sect
= osect
->the_bfd_section
;
869 if (entry_point
>= bfd_section_vma (sect
)
870 && entry_point
< (bfd_section_vma (sect
)
871 + bfd_section_size (sect
)))
873 ei
->the_bfd_section_index
874 = gdb_bfd_section_index (objfile
->obfd
, sect
);
881 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
885 /* Process a symbol file, as either the main file or as a dynamically
888 This function does not set the OBJFILE's entry-point info.
890 OBJFILE is where the symbols are to be read from.
892 ADDRS is the list of section load addresses. If the user has given
893 an 'add-symbol-file' command, then this is the list of offsets and
894 addresses he or she provided as arguments to the command; or, if
895 we're handling a shared library, these are the actual addresses the
896 sections are loaded at, according to the inferior's dynamic linker
897 (as gleaned by GDB's shared library code). We convert each address
898 into an offset from the section VMA's as it appears in the object
899 file, and then call the file's sym_offsets function to convert this
900 into a format-specific offset table --- a `section_offsets'.
901 The sectindex field is used to control the ordering of sections
902 with the same name. Upon return, it is updated to contain the
903 corresponding BFD section index, or -1 if the section was not found.
905 ADD_FLAGS encodes verbosity level, whether this is main symbol or
906 an extra symbol file such as dynamically loaded code, and whether
907 breakpoint reset should be deferred. */
910 syms_from_objfile_1 (struct objfile
*objfile
,
911 section_addr_info
*addrs
,
912 symfile_add_flags add_flags
)
914 section_addr_info local_addr
;
915 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
917 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
919 if (objfile
->sf
== NULL
)
921 /* No symbols to load, but we still need to make sure
922 that the section_offsets table is allocated. */
923 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
925 objfile
->section_offsets
.assign (num_sections
, 0);
929 /* Make sure that partially constructed symbol tables will be cleaned up
930 if an error occurs during symbol reading. */
931 gdb::optional
<clear_symtab_users_cleanup
> defer_clear_users
;
933 objfile_up
objfile_holder (objfile
);
935 /* If ADDRS is NULL, put together a dummy address list.
936 We now establish the convention that an addr of zero means
937 no load address was specified. */
943 /* We will modify the main symbol table, make sure that all its users
944 will be cleaned up if an error occurs during symbol reading. */
945 defer_clear_users
.emplace ((symfile_add_flag
) 0);
947 /* Since no error yet, throw away the old symbol table. */
949 if (symfile_objfile
!= NULL
)
951 symfile_objfile
->unlink ();
952 gdb_assert (symfile_objfile
== NULL
);
955 /* Currently we keep symbols from the add-symbol-file command.
956 If the user wants to get rid of them, they should do "symbol-file"
957 without arguments first. Not sure this is the best behavior
960 (*objfile
->sf
->sym_new_init
) (objfile
);
963 /* Convert addr into an offset rather than an absolute address.
964 We find the lowest address of a loaded segment in the objfile,
965 and assume that <addr> is where that got loaded.
967 We no longer warn if the lowest section is not a text segment (as
968 happens for the PA64 port. */
969 if (addrs
->size () > 0)
970 addr_info_make_relative (addrs
, objfile
->obfd
);
972 /* Initialize symbol reading routines for this objfile, allow complaints to
973 appear for this new file, and record how verbose to be, then do the
974 initial symbol reading for this file. */
976 (*objfile
->sf
->sym_init
) (objfile
);
979 (*objfile
->sf
->sym_offsets
) (objfile
, *addrs
);
981 read_symbols (objfile
, add_flags
);
983 /* Discard cleanups as symbol reading was successful. */
985 objfile_holder
.release ();
986 if (defer_clear_users
)
987 defer_clear_users
->release ();
990 /* Same as syms_from_objfile_1, but also initializes the objfile
994 syms_from_objfile (struct objfile
*objfile
,
995 section_addr_info
*addrs
,
996 symfile_add_flags add_flags
)
998 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
999 init_entry_point_info (objfile
);
1002 /* Perform required actions after either reading in the initial
1003 symbols for a new objfile, or mapping in the symbols from a reusable
1004 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1007 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1009 /* If this is the main symbol file we have to clean up all users of the
1010 old main symbol file. Otherwise it is sufficient to fixup all the
1011 breakpoints that may have been redefined by this symbol file. */
1012 if (add_flags
& SYMFILE_MAINLINE
)
1014 /* OK, make it the "real" symbol file. */
1015 symfile_objfile
= objfile
;
1017 clear_symtab_users (add_flags
);
1019 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1021 breakpoint_re_set ();
1024 /* We're done reading the symbol file; finish off complaints. */
1025 clear_complaints ();
1028 /* Process a symbol file, as either the main file or as a dynamically
1031 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1032 A new reference is acquired by this function.
1034 For NAME description see the objfile constructor.
1036 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1037 extra, such as dynamically loaded code, and what to do with breakpoints.
1039 ADDRS is as described for syms_from_objfile_1, above.
1040 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1042 PARENT is the original objfile if ABFD is a separate debug info file.
1043 Otherwise PARENT is NULL.
1045 Upon success, returns a pointer to the objfile that was added.
1046 Upon failure, jumps back to command level (never returns). */
1048 static struct objfile
*
1049 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1050 symfile_add_flags add_flags
,
1051 section_addr_info
*addrs
,
1052 objfile_flags flags
, struct objfile
*parent
)
1054 struct objfile
*objfile
;
1055 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1056 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1057 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1058 && (readnow_symbol_files
1059 || (add_flags
& SYMFILE_NO_READ
) == 0));
1061 if (readnow_symbol_files
)
1063 flags
|= OBJF_READNOW
;
1064 add_flags
&= ~SYMFILE_NO_READ
;
1066 else if (readnever_symbol_files
1067 || (parent
!= NULL
&& (parent
->flags
& OBJF_READNEVER
)))
1069 flags
|= OBJF_READNEVER
;
1070 add_flags
|= SYMFILE_NO_READ
;
1072 if ((add_flags
& SYMFILE_NOT_FILENAME
) != 0)
1073 flags
|= OBJF_NOT_FILENAME
;
1075 /* Give user a chance to burp if we'd be
1076 interactively wiping out any existing symbols. */
1078 if ((have_full_symbols () || have_partial_symbols ())
1081 && !query (_("Load new symbol table from \"%s\"? "), name
))
1082 error (_("Not confirmed."));
1085 flags
|= OBJF_MAINLINE
;
1086 objfile
= objfile::make (abfd
, name
, flags
, parent
);
1088 /* We either created a new mapped symbol table, mapped an existing
1089 symbol table file which has not had initial symbol reading
1090 performed, or need to read an unmapped symbol table. */
1093 if (deprecated_pre_add_symbol_hook
)
1094 deprecated_pre_add_symbol_hook (name
);
1096 printf_filtered (_("Reading symbols from %ps...\n"),
1097 styled_string (file_name_style
.style (), name
));
1099 syms_from_objfile (objfile
, addrs
, add_flags
);
1101 /* We now have at least a partial symbol table. Check to see if the
1102 user requested that all symbols be read on initial access via either
1103 the gdb startup command line or on a per symbol file basis. Expand
1104 all partial symbol tables for this objfile if so. */
1106 if ((flags
& OBJF_READNOW
))
1109 printf_filtered (_("Expanding full symbols from %ps...\n"),
1110 styled_string (file_name_style
.style (), name
));
1113 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1116 /* Note that we only print a message if we have no symbols and have
1117 no separate debug file. If there is a separate debug file which
1118 does not have symbols, we'll have emitted this message for that
1119 file, and so printing it twice is just redundant. */
1120 if (should_print
&& !objfile_has_symbols (objfile
)
1121 && objfile
->separate_debug_objfile
== nullptr)
1122 printf_filtered (_("(No debugging symbols found in %ps)\n"),
1123 styled_string (file_name_style
.style (), name
));
1127 if (deprecated_post_add_symbol_hook
)
1128 deprecated_post_add_symbol_hook ();
1131 /* We print some messages regardless of whether 'from_tty ||
1132 info_verbose' is true, so make sure they go out at the right
1134 gdb_flush (gdb_stdout
);
1136 if (objfile
->sf
== NULL
)
1138 gdb::observers::new_objfile
.notify (objfile
);
1139 return objfile
; /* No symbols. */
1142 finish_new_objfile (objfile
, add_flags
);
1144 gdb::observers::new_objfile
.notify (objfile
);
1146 bfd_cache_close_all ();
1150 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1151 see the objfile constructor. */
1154 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1155 symfile_add_flags symfile_flags
,
1156 struct objfile
*objfile
)
1158 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1159 because sections of BFD may not match sections of OBJFILE and because
1160 vma may have been modified by tools such as prelink. */
1161 section_addr_info sap
= build_section_addr_info_from_objfile (objfile
);
1163 symbol_file_add_with_addrs
1164 (bfd
, name
, symfile_flags
, &sap
,
1165 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1170 /* Process the symbol file ABFD, as either the main file or as a
1171 dynamically loaded file.
1172 See symbol_file_add_with_addrs's comments for details. */
1175 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1176 symfile_add_flags add_flags
,
1177 section_addr_info
*addrs
,
1178 objfile_flags flags
, struct objfile
*parent
)
1180 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1184 /* Process a symbol file, as either the main file or as a dynamically
1185 loaded file. See symbol_file_add_with_addrs's comments for details. */
1188 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1189 section_addr_info
*addrs
, objfile_flags flags
)
1191 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1193 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1197 /* Call symbol_file_add() with default values and update whatever is
1198 affected by the loading of a new main().
1199 Used when the file is supplied in the gdb command line
1200 and by some targets with special loading requirements.
1201 The auxiliary function, symbol_file_add_main_1(), has the flags
1202 argument for the switches that can only be specified in the symbol_file
1206 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1208 symbol_file_add_main_1 (args
, add_flags
, 0, 0);
1212 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1213 objfile_flags flags
, CORE_ADDR reloff
)
1215 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1217 struct objfile
*objfile
= symbol_file_add (args
, add_flags
, NULL
, flags
);
1219 objfile_rebase (objfile
, reloff
);
1221 /* Getting new symbols may change our opinion about
1222 what is frameless. */
1223 reinit_frame_cache ();
1225 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1226 set_initial_language ();
1230 symbol_file_clear (int from_tty
)
1232 if ((have_full_symbols () || have_partial_symbols ())
1235 ? !query (_("Discard symbol table from `%s'? "),
1236 objfile_name (symfile_objfile
))
1237 : !query (_("Discard symbol table? "))))
1238 error (_("Not confirmed."));
1240 /* solib descriptors may have handles to objfiles. Wipe them before their
1241 objfiles get stale by free_all_objfiles. */
1242 no_shared_libraries (NULL
, from_tty
);
1244 current_program_space
->free_all_objfiles ();
1246 gdb_assert (symfile_objfile
== NULL
);
1248 printf_filtered (_("No symbol file now.\n"));
1251 /* See symfile.h. */
1253 bool separate_debug_file_debug
= false;
1256 separate_debug_file_exists (const std::string
&name
, unsigned long crc
,
1257 struct objfile
*parent_objfile
)
1259 unsigned long file_crc
;
1261 struct stat parent_stat
, abfd_stat
;
1262 int verified_as_different
;
1264 /* Find a separate debug info file as if symbols would be present in
1265 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1266 section can contain just the basename of PARENT_OBJFILE without any
1267 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1268 the separate debug infos with the same basename can exist. */
1270 if (filename_cmp (name
.c_str (), objfile_name (parent_objfile
)) == 0)
1273 if (separate_debug_file_debug
)
1275 printf_filtered (_(" Trying %s..."), name
.c_str ());
1276 gdb_flush (gdb_stdout
);
1279 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
.c_str (), gnutarget
, -1));
1283 if (separate_debug_file_debug
)
1284 printf_filtered (_(" no, unable to open.\n"));
1289 /* Verify symlinks were not the cause of filename_cmp name difference above.
1291 Some operating systems, e.g. Windows, do not provide a meaningful
1292 st_ino; they always set it to zero. (Windows does provide a
1293 meaningful st_dev.) Files accessed from gdbservers that do not
1294 support the vFile:fstat packet will also have st_ino set to zero.
1295 Do not indicate a duplicate library in either case. While there
1296 is no guarantee that a system that provides meaningful inode
1297 numbers will never set st_ino to zero, this is merely an
1298 optimization, so we do not need to worry about false negatives. */
1300 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1301 && abfd_stat
.st_ino
!= 0
1302 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1304 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1305 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1307 if (separate_debug_file_debug
)
1308 printf_filtered (_(" no, same file as the objfile.\n"));
1312 verified_as_different
= 1;
1315 verified_as_different
= 0;
1317 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1321 if (separate_debug_file_debug
)
1322 printf_filtered (_(" no, error computing CRC.\n"));
1327 if (crc
!= file_crc
)
1329 unsigned long parent_crc
;
1331 /* If the files could not be verified as different with
1332 bfd_stat then we need to calculate the parent's CRC
1333 to verify whether the files are different or not. */
1335 if (!verified_as_different
)
1337 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1339 if (separate_debug_file_debug
)
1340 printf_filtered (_(" no, error computing CRC.\n"));
1346 if (verified_as_different
|| parent_crc
!= file_crc
)
1347 warning (_("the debug information found in \"%s\""
1348 " does not match \"%s\" (CRC mismatch).\n"),
1349 name
.c_str (), objfile_name (parent_objfile
));
1351 if (separate_debug_file_debug
)
1352 printf_filtered (_(" no, CRC doesn't match.\n"));
1357 if (separate_debug_file_debug
)
1358 printf_filtered (_(" yes!\n"));
1363 char *debug_file_directory
= NULL
;
1365 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1366 struct cmd_list_element
*c
, const char *value
)
1368 fprintf_filtered (file
,
1369 _("The directory where separate debug "
1370 "symbols are searched for is \"%s\".\n"),
1374 #if ! defined (DEBUG_SUBDIRECTORY)
1375 #define DEBUG_SUBDIRECTORY ".debug"
1378 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1379 where the original file resides (may not be the same as
1380 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1381 looking for. CANON_DIR is the "realpath" form of DIR.
1382 DIR must contain a trailing '/'.
1383 Returns the path of the file with separate debug info, or an empty
1387 find_separate_debug_file (const char *dir
,
1388 const char *canon_dir
,
1389 const char *debuglink
,
1390 unsigned long crc32
, struct objfile
*objfile
)
1392 if (separate_debug_file_debug
)
1393 printf_filtered (_("\nLooking for separate debug info (debug link) for "
1394 "%s\n"), objfile_name (objfile
));
1396 /* First try in the same directory as the original file. */
1397 std::string debugfile
= dir
;
1398 debugfile
+= debuglink
;
1400 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1403 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1405 debugfile
+= DEBUG_SUBDIRECTORY
;
1407 debugfile
+= debuglink
;
1409 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1412 /* Then try in the global debugfile directories.
1414 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1415 cause "/..." lookups. */
1417 bool target_prefix
= startswith (dir
, "target:");
1418 const char *dir_notarget
= target_prefix
? dir
+ strlen ("target:") : dir
;
1419 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
1420 = dirnames_to_char_ptr_vec (debug_file_directory
);
1421 gdb::unique_xmalloc_ptr
<char> canon_sysroot
= gdb_realpath (gdb_sysroot
);
1423 /* MS-Windows/MS-DOS don't allow colons in file names; we must
1424 convert the drive letter into a one-letter directory, so that the
1425 file name resulting from splicing below will be valid.
1427 FIXME: The below only works when GDB runs on MS-Windows/MS-DOS.
1428 There are various remote-debugging scenarios where such a
1429 transformation of the drive letter might be required when GDB runs
1430 on a Posix host, see
1432 https://sourceware.org/ml/gdb-patches/2019-04/msg00605.html
1434 If some of those scenarios need to be supported, we will need to
1435 use a different condition for HAS_DRIVE_SPEC and a different macro
1436 instead of STRIP_DRIVE_SPEC, which work on Posix systems as well. */
1438 if (HAS_DRIVE_SPEC (dir_notarget
))
1440 drive
= dir_notarget
[0];
1441 dir_notarget
= STRIP_DRIVE_SPEC (dir_notarget
);
1444 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
1446 debugfile
= target_prefix
? "target:" : "";
1447 debugfile
+= debugdir
.get ();
1450 debugfile
+= dir_notarget
;
1451 debugfile
+= debuglink
;
1453 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1456 const char *base_path
= NULL
;
1457 if (canon_dir
!= NULL
)
1459 if (canon_sysroot
.get () != NULL
)
1460 base_path
= child_path (canon_sysroot
.get (), canon_dir
);
1462 base_path
= child_path (gdb_sysroot
, canon_dir
);
1464 if (base_path
!= NULL
)
1466 /* If the file is in the sysroot, try using its base path in
1467 the global debugfile directory. */
1468 debugfile
= target_prefix
? "target:" : "";
1469 debugfile
+= debugdir
.get ();
1471 debugfile
+= base_path
;
1473 debugfile
+= debuglink
;
1475 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1478 /* If the file is in the sysroot, try using its base path in
1479 the sysroot's global debugfile directory. */
1480 debugfile
= target_prefix
? "target:" : "";
1481 debugfile
+= gdb_sysroot
;
1482 debugfile
+= debugdir
.get ();
1484 debugfile
+= base_path
;
1486 debugfile
+= debuglink
;
1488 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1494 return std::string ();
1497 /* Modify PATH to contain only "[/]directory/" part of PATH.
1498 If there were no directory separators in PATH, PATH will be empty
1499 string on return. */
1502 terminate_after_last_dir_separator (char *path
)
1506 /* Strip off the final filename part, leaving the directory name,
1507 followed by a slash. The directory can be relative or absolute. */
1508 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1509 if (IS_DIR_SEPARATOR (path
[i
]))
1512 /* If I is -1 then no directory is present there and DIR will be "". */
1516 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1517 Returns pathname, or an empty string. */
1520 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1522 unsigned long crc32
;
1524 gdb::unique_xmalloc_ptr
<char> debuglink
1525 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1527 if (debuglink
== NULL
)
1529 /* There's no separate debug info, hence there's no way we could
1530 load it => no warning. */
1531 return std::string ();
1534 std::string dir
= objfile_name (objfile
);
1535 terminate_after_last_dir_separator (&dir
[0]);
1536 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1538 std::string debugfile
1539 = find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1540 debuglink
.get (), crc32
, objfile
);
1542 if (debugfile
.empty ())
1544 /* For PR gdb/9538, try again with realpath (if different from the
1549 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1550 && S_ISLNK (st_buf
.st_mode
))
1552 gdb::unique_xmalloc_ptr
<char> symlink_dir
1553 (lrealpath (objfile_name (objfile
)));
1554 if (symlink_dir
!= NULL
)
1556 terminate_after_last_dir_separator (symlink_dir
.get ());
1557 if (dir
!= symlink_dir
.get ())
1559 /* Different directory, so try using it. */
1560 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1573 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1577 validate_readnow_readnever (objfile_flags flags
)
1579 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1580 error (_("-readnow and -readnever cannot be used simultaneously"));
1583 /* This is the symbol-file command. Read the file, analyze its
1584 symbols, and add a struct symtab to a symtab list. The syntax of
1585 the command is rather bizarre:
1587 1. The function buildargv implements various quoting conventions
1588 which are undocumented and have little or nothing in common with
1589 the way things are quoted (or not quoted) elsewhere in GDB.
1591 2. Options are used, which are not generally used in GDB (perhaps
1592 "set mapped on", "set readnow on" would be better)
1594 3. The order of options matters, which is contrary to GNU
1595 conventions (because it is confusing and inconvenient). */
1598 symbol_file_command (const char *args
, int from_tty
)
1604 symbol_file_clear (from_tty
);
1608 objfile_flags flags
= OBJF_USERLOADED
;
1609 symfile_add_flags add_flags
= 0;
1611 bool stop_processing_options
= false;
1612 CORE_ADDR offset
= 0;
1617 add_flags
|= SYMFILE_VERBOSE
;
1619 gdb_argv
built_argv (args
);
1620 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1622 if (stop_processing_options
|| *arg
!= '-')
1627 error (_("Unrecognized argument \"%s\""), arg
);
1629 else if (strcmp (arg
, "-readnow") == 0)
1630 flags
|= OBJF_READNOW
;
1631 else if (strcmp (arg
, "-readnever") == 0)
1632 flags
|= OBJF_READNEVER
;
1633 else if (strcmp (arg
, "-o") == 0)
1635 arg
= built_argv
[++idx
];
1637 error (_("Missing argument to -o"));
1639 offset
= parse_and_eval_address (arg
);
1641 else if (strcmp (arg
, "--") == 0)
1642 stop_processing_options
= true;
1644 error (_("Unrecognized argument \"%s\""), arg
);
1648 error (_("no symbol file name was specified"));
1650 validate_readnow_readnever (flags
);
1652 /* Set SYMFILE_DEFER_BP_RESET because the proper displacement for a PIE
1653 (Position Independent Executable) main symbol file will only be
1654 computed by the solib_create_inferior_hook below. Without it,
1655 breakpoint_re_set would fail to insert the breakpoints with the zero
1657 add_flags
|= SYMFILE_DEFER_BP_RESET
;
1659 symbol_file_add_main_1 (name
, add_flags
, flags
, offset
);
1661 solib_create_inferior_hook (from_tty
);
1663 /* Now it's safe to re-add the breakpoints. */
1664 breakpoint_re_set ();
1668 /* Set the initial language.
1670 FIXME: A better solution would be to record the language in the
1671 psymtab when reading partial symbols, and then use it (if known) to
1672 set the language. This would be a win for formats that encode the
1673 language in an easily discoverable place, such as DWARF. For
1674 stabs, we can jump through hoops looking for specially named
1675 symbols or try to intuit the language from the specific type of
1676 stabs we find, but we can't do that until later when we read in
1680 set_initial_language (void)
1682 enum language lang
= main_language ();
1684 if (lang
== language_unknown
)
1686 const char *name
= main_name ();
1687 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1690 lang
= sym
->language ();
1693 if (lang
== language_unknown
)
1695 /* Make C the default language */
1699 set_language (lang
);
1700 expected_language
= current_language
; /* Don't warn the user. */
1703 /* Open the file specified by NAME and hand it off to BFD for
1704 preliminary analysis. Return a newly initialized bfd *, which
1705 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1706 absolute). In case of trouble, error() is called. */
1709 symfile_bfd_open (const char *name
)
1713 gdb::unique_xmalloc_ptr
<char> absolute_name
;
1714 if (!is_target_filename (name
))
1716 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1718 /* Look down path for it, allocate 2nd new malloc'd copy. */
1719 desc
= openp (getenv ("PATH"),
1720 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1721 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1722 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1725 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1727 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1728 desc
= openp (getenv ("PATH"),
1729 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1730 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1734 perror_with_name (expanded_name
.get ());
1736 name
= absolute_name
.get ();
1739 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1740 if (sym_bfd
== NULL
)
1741 error (_("`%s': can't open to read symbols: %s."), name
,
1742 bfd_errmsg (bfd_get_error ()));
1744 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1745 bfd_set_cacheable (sym_bfd
.get (), 1);
1747 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1748 error (_("`%s': can't read symbols: %s."), name
,
1749 bfd_errmsg (bfd_get_error ()));
1754 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1755 the section was not found. */
1758 get_section_index (struct objfile
*objfile
, const char *section_name
)
1760 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1768 /* Link SF into the global symtab_fns list.
1769 FLAVOUR is the file format that SF handles.
1770 Called on startup by the _initialize routine in each object file format
1771 reader, to register information about each format the reader is prepared
1775 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1777 symtab_fns
.emplace_back (flavour
, sf
);
1780 /* Initialize OBJFILE to read symbols from its associated BFD. It
1781 either returns or calls error(). The result is an initialized
1782 struct sym_fns in the objfile structure, that contains cached
1783 information about the symbol file. */
1785 static const struct sym_fns
*
1786 find_sym_fns (bfd
*abfd
)
1788 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1790 if (our_flavour
== bfd_target_srec_flavour
1791 || our_flavour
== bfd_target_ihex_flavour
1792 || our_flavour
== bfd_target_tekhex_flavour
)
1793 return NULL
; /* No symbols. */
1795 for (const registered_sym_fns
&rsf
: symtab_fns
)
1796 if (our_flavour
== rsf
.sym_flavour
)
1799 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1800 bfd_get_target (abfd
));
1804 /* This function runs the load command of our current target. */
1807 load_command (const char *arg
, int from_tty
)
1811 /* The user might be reloading because the binary has changed. Take
1812 this opportunity to check. */
1813 reopen_exec_file ();
1819 const char *parg
, *prev
;
1821 arg
= get_exec_file (1);
1823 /* We may need to quote this string so buildargv can pull it
1826 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1828 temp
.append (prev
, parg
- prev
);
1830 temp
.push_back ('\\');
1832 /* If we have not copied anything yet, then we didn't see a
1833 character to quote, and we can just leave ARG unchanged. */
1837 arg
= temp
.c_str ();
1841 target_load (arg
, from_tty
);
1843 /* After re-loading the executable, we don't really know which
1844 overlays are mapped any more. */
1845 overlay_cache_invalid
= 1;
1848 /* This version of "load" should be usable for any target. Currently
1849 it is just used for remote targets, not inftarg.c or core files,
1850 on the theory that only in that case is it useful.
1852 Avoiding xmodem and the like seems like a win (a) because we don't have
1853 to worry about finding it, and (b) On VMS, fork() is very slow and so
1854 we don't want to run a subprocess. On the other hand, I'm not sure how
1855 performance compares. */
1857 static int validate_download
= 0;
1859 /* Callback service function for generic_load (bfd_map_over_sections). */
1862 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1864 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1866 *sum
+= bfd_section_size (asec
);
1869 /* Opaque data for load_progress. */
1870 struct load_progress_data
1872 /* Cumulative data. */
1873 unsigned long write_count
= 0;
1874 unsigned long data_count
= 0;
1875 bfd_size_type total_size
= 0;
1878 /* Opaque data for load_progress for a single section. */
1879 struct load_progress_section_data
1881 load_progress_section_data (load_progress_data
*cumulative_
,
1882 const char *section_name_
, ULONGEST section_size_
,
1883 CORE_ADDR lma_
, gdb_byte
*buffer_
)
1884 : cumulative (cumulative_
), section_name (section_name_
),
1885 section_size (section_size_
), lma (lma_
), buffer (buffer_
)
1888 struct load_progress_data
*cumulative
;
1890 /* Per-section data. */
1891 const char *section_name
;
1892 ULONGEST section_sent
= 0;
1893 ULONGEST section_size
;
1898 /* Opaque data for load_section_callback. */
1899 struct load_section_data
1901 load_section_data (load_progress_data
*progress_data_
)
1902 : progress_data (progress_data_
)
1905 ~load_section_data ()
1907 for (auto &&request
: requests
)
1909 xfree (request
.data
);
1910 delete ((load_progress_section_data
*) request
.baton
);
1914 CORE_ADDR load_offset
= 0;
1915 struct load_progress_data
*progress_data
;
1916 std::vector
<struct memory_write_request
> requests
;
1919 /* Target write callback routine for progress reporting. */
1922 load_progress (ULONGEST bytes
, void *untyped_arg
)
1924 struct load_progress_section_data
*args
1925 = (struct load_progress_section_data
*) untyped_arg
;
1926 struct load_progress_data
*totals
;
1929 /* Writing padding data. No easy way to get at the cumulative
1930 stats, so just ignore this. */
1933 totals
= args
->cumulative
;
1935 if (bytes
== 0 && args
->section_sent
== 0)
1937 /* The write is just starting. Let the user know we've started
1939 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1941 hex_string (args
->section_size
),
1942 paddress (target_gdbarch (), args
->lma
));
1946 if (validate_download
)
1948 /* Broken memories and broken monitors manifest themselves here
1949 when bring new computers to life. This doubles already slow
1951 /* NOTE: cagney/1999-10-18: A more efficient implementation
1952 might add a verify_memory() method to the target vector and
1953 then use that. remote.c could implement that method using
1954 the ``qCRC'' packet. */
1955 gdb::byte_vector
check (bytes
);
1957 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1958 error (_("Download verify read failed at %s"),
1959 paddress (target_gdbarch (), args
->lma
));
1960 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1961 error (_("Download verify compare failed at %s"),
1962 paddress (target_gdbarch (), args
->lma
));
1964 totals
->data_count
+= bytes
;
1966 args
->buffer
+= bytes
;
1967 totals
->write_count
+= 1;
1968 args
->section_sent
+= bytes
;
1969 if (check_quit_flag ()
1970 || (deprecated_ui_load_progress_hook
!= NULL
1971 && deprecated_ui_load_progress_hook (args
->section_name
,
1972 args
->section_sent
)))
1973 error (_("Canceled the download"));
1975 if (deprecated_show_load_progress
!= NULL
)
1976 deprecated_show_load_progress (args
->section_name
,
1980 totals
->total_size
);
1983 /* Callback service function for generic_load (bfd_map_over_sections). */
1986 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1988 struct load_section_data
*args
= (struct load_section_data
*) data
;
1989 bfd_size_type size
= bfd_section_size (asec
);
1990 const char *sect_name
= bfd_section_name (asec
);
1992 if ((bfd_section_flags (asec
) & SEC_LOAD
) == 0)
1998 ULONGEST begin
= bfd_section_lma (asec
) + args
->load_offset
;
1999 ULONGEST end
= begin
+ size
;
2000 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (size
);
2001 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2003 load_progress_section_data
*section_data
2004 = new load_progress_section_data (args
->progress_data
, sect_name
, size
,
2007 args
->requests
.emplace_back (begin
, end
, buffer
, section_data
);
2010 static void print_transfer_performance (struct ui_file
*stream
,
2011 unsigned long data_count
,
2012 unsigned long write_count
,
2013 std::chrono::steady_clock::duration d
);
2015 /* See symfile.h. */
2018 generic_load (const char *args
, int from_tty
)
2020 struct load_progress_data total_progress
;
2021 struct load_section_data
cbdata (&total_progress
);
2022 struct ui_out
*uiout
= current_uiout
;
2025 error_no_arg (_("file to load"));
2027 gdb_argv
argv (args
);
2029 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2031 if (argv
[1] != NULL
)
2035 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2037 /* If the last word was not a valid number then
2038 treat it as a file name with spaces in. */
2039 if (argv
[1] == endptr
)
2040 error (_("Invalid download offset:%s."), argv
[1]);
2042 if (argv
[2] != NULL
)
2043 error (_("Too many parameters."));
2046 /* Open the file for loading. */
2047 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
2048 if (loadfile_bfd
== NULL
)
2049 perror_with_name (filename
.get ());
2051 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2053 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2054 bfd_errmsg (bfd_get_error ()));
2057 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
2058 (void *) &total_progress
.total_size
);
2060 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
2062 using namespace std::chrono
;
2064 steady_clock::time_point start_time
= steady_clock::now ();
2066 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2067 load_progress
) != 0)
2068 error (_("Load failed"));
2070 steady_clock::time_point end_time
= steady_clock::now ();
2072 CORE_ADDR entry
= bfd_get_start_address (loadfile_bfd
.get ());
2073 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2074 uiout
->text ("Start address ");
2075 uiout
->field_core_addr ("address", target_gdbarch (), entry
);
2076 uiout
->text (", load size ");
2077 uiout
->field_unsigned ("load-size", total_progress
.data_count
);
2079 regcache_write_pc (get_current_regcache (), entry
);
2081 /* Reset breakpoints, now that we have changed the load image. For
2082 instance, breakpoints may have been set (or reset, by
2083 post_create_inferior) while connected to the target but before we
2084 loaded the program. In that case, the prologue analyzer could
2085 have read instructions from the target to find the right
2086 breakpoint locations. Loading has changed the contents of that
2089 breakpoint_re_set ();
2091 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2092 total_progress
.write_count
,
2093 end_time
- start_time
);
2096 /* Report on STREAM the performance of a memory transfer operation,
2097 such as 'load'. DATA_COUNT is the number of bytes transferred.
2098 WRITE_COUNT is the number of separate write operations, or 0, if
2099 that information is not available. TIME is how long the operation
2103 print_transfer_performance (struct ui_file
*stream
,
2104 unsigned long data_count
,
2105 unsigned long write_count
,
2106 std::chrono::steady_clock::duration time
)
2108 using namespace std::chrono
;
2109 struct ui_out
*uiout
= current_uiout
;
2111 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2113 uiout
->text ("Transfer rate: ");
2114 if (ms
.count () > 0)
2116 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2118 if (uiout
->is_mi_like_p ())
2120 uiout
->field_unsigned ("transfer-rate", rate
* 8);
2121 uiout
->text (" bits/sec");
2123 else if (rate
< 1024)
2125 uiout
->field_unsigned ("transfer-rate", rate
);
2126 uiout
->text (" bytes/sec");
2130 uiout
->field_unsigned ("transfer-rate", rate
/ 1024);
2131 uiout
->text (" KB/sec");
2136 uiout
->field_unsigned ("transferred-bits", (data_count
* 8));
2137 uiout
->text (" bits in <1 sec");
2139 if (write_count
> 0)
2142 uiout
->field_unsigned ("write-rate", data_count
/ write_count
);
2143 uiout
->text (" bytes/write");
2145 uiout
->text (".\n");
2148 /* Add an OFFSET to the start address of each section in OBJF, except
2149 sections that were specified in ADDRS. */
2152 set_objfile_default_section_offset (struct objfile
*objf
,
2153 const section_addr_info
&addrs
,
2156 /* Add OFFSET to all sections by default. */
2157 section_offsets
offsets (objf
->section_offsets
.size (), offset
);
2159 /* Create sorted lists of all sections in ADDRS as well as all
2160 sections in OBJF. */
2162 std::vector
<const struct other_sections
*> addrs_sorted
2163 = addrs_section_sort (addrs
);
2165 section_addr_info objf_addrs
2166 = build_section_addr_info_from_objfile (objf
);
2167 std::vector
<const struct other_sections
*> objf_addrs_sorted
2168 = addrs_section_sort (objf_addrs
);
2170 /* Walk the BFD section list, and if a matching section is found in
2171 ADDRS_SORTED_LIST, set its offset to zero to keep its address
2174 Note that both lists may contain multiple sections with the same
2175 name, and then the sections from ADDRS are matched in BFD order
2176 (thanks to sectindex). */
2178 std::vector
<const struct other_sections
*>::iterator addrs_sorted_iter
2179 = addrs_sorted
.begin ();
2180 for (const other_sections
*objf_sect
: objf_addrs_sorted
)
2182 const char *objf_name
= addr_section_name (objf_sect
->name
.c_str ());
2185 while (cmp
< 0 && addrs_sorted_iter
!= addrs_sorted
.end ())
2187 const struct other_sections
*sect
= *addrs_sorted_iter
;
2188 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
2189 cmp
= strcmp (sect_name
, objf_name
);
2191 ++addrs_sorted_iter
;
2195 offsets
[objf_sect
->sectindex
] = 0;
2198 /* Apply the new section offsets. */
2199 objfile_relocate (objf
, offsets
);
2202 /* This function allows the addition of incrementally linked object files.
2203 It does not modify any state in the target, only in the debugger. */
2206 add_symbol_file_command (const char *args
, int from_tty
)
2208 struct gdbarch
*gdbarch
= get_current_arch ();
2209 gdb::unique_xmalloc_ptr
<char> filename
;
2212 struct objfile
*objf
;
2213 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2214 symfile_add_flags add_flags
= 0;
2217 add_flags
|= SYMFILE_VERBOSE
;
2225 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2226 bool stop_processing_options
= false;
2227 CORE_ADDR offset
= 0;
2232 error (_("add-symbol-file takes a file name and an address"));
2234 bool seen_addr
= false;
2235 bool seen_offset
= false;
2236 gdb_argv
argv (args
);
2238 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2240 if (stop_processing_options
|| *arg
!= '-')
2242 if (filename
== NULL
)
2244 /* First non-option argument is always the filename. */
2245 filename
.reset (tilde_expand (arg
));
2247 else if (!seen_addr
)
2249 /* The second non-option argument is always the text
2250 address at which to load the program. */
2251 sect_opts
[0].value
= arg
;
2255 error (_("Unrecognized argument \"%s\""), arg
);
2257 else if (strcmp (arg
, "-readnow") == 0)
2258 flags
|= OBJF_READNOW
;
2259 else if (strcmp (arg
, "-readnever") == 0)
2260 flags
|= OBJF_READNEVER
;
2261 else if (strcmp (arg
, "-s") == 0)
2263 if (argv
[argcnt
+ 1] == NULL
)
2264 error (_("Missing section name after \"-s\""));
2265 else if (argv
[argcnt
+ 2] == NULL
)
2266 error (_("Missing section address after \"-s\""));
2268 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2270 sect_opts
.push_back (sect
);
2273 else if (strcmp (arg
, "-o") == 0)
2275 arg
= argv
[++argcnt
];
2277 error (_("Missing argument to -o"));
2279 offset
= parse_and_eval_address (arg
);
2282 else if (strcmp (arg
, "--") == 0)
2283 stop_processing_options
= true;
2285 error (_("Unrecognized argument \"%s\""), arg
);
2288 if (filename
== NULL
)
2289 error (_("You must provide a filename to be loaded."));
2291 validate_readnow_readnever (flags
);
2293 /* Print the prompt for the query below. And save the arguments into
2294 a sect_addr_info structure to be passed around to other
2295 functions. We have to split this up into separate print
2296 statements because hex_string returns a local static
2299 printf_unfiltered (_("add symbol table from file \"%s\""),
2301 section_addr_info section_addrs
;
2302 std::vector
<sect_opt
>::const_iterator it
= sect_opts
.begin ();
2305 for (; it
!= sect_opts
.end (); ++it
)
2308 const char *val
= it
->value
;
2309 const char *sec
= it
->name
;
2311 if (section_addrs
.empty ())
2312 printf_unfiltered (_(" at\n"));
2313 addr
= parse_and_eval_address (val
);
2315 /* Here we store the section offsets in the order they were
2316 entered on the command line. Every array element is
2317 assigned an ascending section index to preserve the above
2318 order over an unstable sorting algorithm. This dummy
2319 index is not used for any other purpose.
2321 section_addrs
.emplace_back (addr
, sec
, section_addrs
.size ());
2322 printf_filtered ("\t%s_addr = %s\n", sec
,
2323 paddress (gdbarch
, addr
));
2325 /* The object's sections are initialized when a
2326 call is made to build_objfile_section_table (objfile).
2327 This happens in reread_symbols.
2328 At this point, we don't know what file type this is,
2329 so we can't determine what section names are valid. */
2332 printf_unfiltered (_("%s offset by %s\n"),
2333 (section_addrs
.empty ()
2334 ? _(" with all sections")
2335 : _("with other sections")),
2336 paddress (gdbarch
, offset
));
2337 else if (section_addrs
.empty ())
2338 printf_unfiltered ("\n");
2340 if (from_tty
&& (!query ("%s", "")))
2341 error (_("Not confirmed."));
2343 objf
= symbol_file_add (filename
.get (), add_flags
, §ion_addrs
,
2345 if (!objfile_has_symbols (objf
) && objf
->per_bfd
->minimal_symbol_count
<= 0)
2346 warning (_("newly-added symbol file \"%s\" does not provide any symbols"),
2350 set_objfile_default_section_offset (objf
, section_addrs
, offset
);
2352 add_target_sections_of_objfile (objf
);
2354 /* Getting new symbols may change our opinion about what is
2356 reinit_frame_cache ();
2360 /* This function removes a symbol file that was added via add-symbol-file. */
2363 remove_symbol_file_command (const char *args
, int from_tty
)
2365 struct objfile
*objf
= NULL
;
2366 struct program_space
*pspace
= current_program_space
;
2371 error (_("remove-symbol-file: no symbol file provided"));
2373 gdb_argv
argv (args
);
2375 if (strcmp (argv
[0], "-a") == 0)
2377 /* Interpret the next argument as an address. */
2380 if (argv
[1] == NULL
)
2381 error (_("Missing address argument"));
2383 if (argv
[2] != NULL
)
2384 error (_("Junk after %s"), argv
[1]);
2386 addr
= parse_and_eval_address (argv
[1]);
2388 for (objfile
*objfile
: current_program_space
->objfiles ())
2390 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2391 && (objfile
->flags
& OBJF_SHARED
) != 0
2392 && objfile
->pspace
== pspace
2393 && is_addr_in_objfile (addr
, objfile
))
2400 else if (argv
[0] != NULL
)
2402 /* Interpret the current argument as a file name. */
2404 if (argv
[1] != NULL
)
2405 error (_("Junk after %s"), argv
[0]);
2407 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2409 for (objfile
*objfile
: current_program_space
->objfiles ())
2411 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2412 && (objfile
->flags
& OBJF_SHARED
) != 0
2413 && objfile
->pspace
== pspace
2414 && filename_cmp (filename
.get (), objfile_name (objfile
)) == 0)
2423 error (_("No symbol file found"));
2426 && !query (_("Remove symbol table from file \"%s\"? "),
2427 objfile_name (objf
)))
2428 error (_("Not confirmed."));
2431 clear_symtab_users (0);
2434 /* Re-read symbols if a symbol-file has changed. */
2437 reread_symbols (void)
2440 struct stat new_statbuf
;
2442 std::vector
<struct objfile
*> new_objfiles
;
2444 for (objfile
*objfile
: current_program_space
->objfiles ())
2446 if (objfile
->obfd
== NULL
)
2449 /* Separate debug objfiles are handled in the main objfile. */
2450 if (objfile
->separate_debug_objfile_backlink
)
2453 /* If this object is from an archive (what you usually create with
2454 `ar', often called a `static library' on most systems, though
2455 a `shared library' on AIX is also an archive), then you should
2456 stat on the archive name, not member name. */
2457 if (objfile
->obfd
->my_archive
)
2458 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2460 res
= stat (objfile_name (objfile
), &new_statbuf
);
2463 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2464 printf_filtered (_("`%s' has disappeared; keeping its symbols.\n"),
2465 objfile_name (objfile
));
2468 new_modtime
= new_statbuf
.st_mtime
;
2469 if (new_modtime
!= objfile
->mtime
)
2471 printf_filtered (_("`%s' has changed; re-reading symbols.\n"),
2472 objfile_name (objfile
));
2474 /* There are various functions like symbol_file_add,
2475 symfile_bfd_open, syms_from_objfile, etc., which might
2476 appear to do what we want. But they have various other
2477 effects which we *don't* want. So we just do stuff
2478 ourselves. We don't worry about mapped files (for one thing,
2479 any mapped file will be out of date). */
2481 /* If we get an error, blow away this objfile (not sure if
2482 that is the correct response for things like shared
2484 objfile_up
objfile_holder (objfile
);
2486 /* We need to do this whenever any symbols go away. */
2487 clear_symtab_users_cleanup
defer_clear_users (0);
2489 if (exec_bfd
!= NULL
2490 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2491 bfd_get_filename (exec_bfd
)) == 0)
2493 /* Reload EXEC_BFD without asking anything. */
2495 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2498 /* Keep the calls order approx. the same as in free_objfile. */
2500 /* Free the separate debug objfiles. It will be
2501 automatically recreated by sym_read. */
2502 free_objfile_separate_debug (objfile
);
2504 /* Clear the stale source cache. */
2505 forget_cached_source_info ();
2507 /* Remove any references to this objfile in the global
2509 preserve_values (objfile
);
2511 /* Nuke all the state that we will re-read. Much of the following
2512 code which sets things to NULL really is necessary to tell
2513 other parts of GDB that there is nothing currently there.
2515 Try to keep the freeing order compatible with free_objfile. */
2517 if (objfile
->sf
!= NULL
)
2519 (*objfile
->sf
->sym_finish
) (objfile
);
2522 clear_objfile_data (objfile
);
2524 /* Clean up any state BFD has sitting around. */
2526 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2527 const char *obfd_filename
;
2529 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2530 /* Open the new BFD before freeing the old one, so that
2531 the filename remains live. */
2532 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2533 objfile
->obfd
= temp
.release ();
2534 if (objfile
->obfd
== NULL
)
2535 error (_("Can't open %s to read symbols."), obfd_filename
);
2538 std::string original_name
= objfile
->original_name
;
2540 /* bfd_openr sets cacheable to true, which is what we want. */
2541 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2542 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2543 bfd_errmsg (bfd_get_error ()));
2545 objfile
->reset_psymtabs ();
2547 /* NB: after this call to obstack_free, objfiles_changed
2548 will need to be called (see discussion below). */
2549 obstack_free (&objfile
->objfile_obstack
, 0);
2550 objfile
->sections
= NULL
;
2551 objfile
->compunit_symtabs
= NULL
;
2552 objfile
->template_symbols
= NULL
;
2553 objfile
->static_links
.reset (nullptr);
2555 /* obstack_init also initializes the obstack so it is
2556 empty. We could use obstack_specify_allocation but
2557 gdb_obstack.h specifies the alloc/dealloc functions. */
2558 obstack_init (&objfile
->objfile_obstack
);
2560 /* set_objfile_per_bfd potentially allocates the per-bfd
2561 data on the objfile's obstack (if sharing data across
2562 multiple users is not possible), so it's important to
2563 do it *after* the obstack has been initialized. */
2564 set_objfile_per_bfd (objfile
);
2566 objfile
->original_name
2567 = obstack_strdup (&objfile
->objfile_obstack
, original_name
);
2569 /* Reset the sym_fns pointer. The ELF reader can change it
2570 based on whether .gdb_index is present, and we need it to
2571 start over. PR symtab/15885 */
2572 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2574 build_objfile_section_table (objfile
);
2576 /* What the hell is sym_new_init for, anyway? The concept of
2577 distinguishing between the main file and additional files
2578 in this way seems rather dubious. */
2579 if (objfile
== symfile_objfile
)
2581 (*objfile
->sf
->sym_new_init
) (objfile
);
2584 (*objfile
->sf
->sym_init
) (objfile
);
2585 clear_complaints ();
2587 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2589 /* We are about to read new symbols and potentially also
2590 DWARF information. Some targets may want to pass addresses
2591 read from DWARF DIE's through an adjustment function before
2592 saving them, like MIPS, which may call into
2593 "find_pc_section". When called, that function will make
2594 use of per-objfile program space data.
2596 Since we discarded our section information above, we have
2597 dangling pointers in the per-objfile program space data
2598 structure. Force GDB to update the section mapping
2599 information by letting it know the objfile has changed,
2600 making the dangling pointers point to correct data
2603 objfiles_changed ();
2605 read_symbols (objfile
, 0);
2607 if (!objfile_has_symbols (objfile
))
2610 printf_filtered (_("(no debugging symbols found)\n"));
2614 /* We're done reading the symbol file; finish off complaints. */
2615 clear_complaints ();
2617 /* Getting new symbols may change our opinion about what is
2620 reinit_frame_cache ();
2622 /* Discard cleanups as symbol reading was successful. */
2623 objfile_holder
.release ();
2624 defer_clear_users
.release ();
2626 /* If the mtime has changed between the time we set new_modtime
2627 and now, we *want* this to be out of date, so don't call stat
2629 objfile
->mtime
= new_modtime
;
2630 init_entry_point_info (objfile
);
2632 new_objfiles
.push_back (objfile
);
2636 if (!new_objfiles
.empty ())
2638 clear_symtab_users (0);
2640 /* clear_objfile_data for each objfile was called before freeing it and
2641 gdb::observers::new_objfile.notify (NULL) has been called by
2642 clear_symtab_users above. Notify the new files now. */
2643 for (auto iter
: new_objfiles
)
2644 gdb::observers::new_objfile
.notify (iter
);
2646 /* At least one objfile has changed, so we can consider that
2647 the executable we're debugging has changed too. */
2648 gdb::observers::executable_changed
.notify ();
2653 struct filename_language
2655 filename_language (const std::string
&ext_
, enum language lang_
)
2656 : ext (ext_
), lang (lang_
)
2663 static std::vector
<filename_language
> filename_language_table
;
2665 /* See symfile.h. */
2668 add_filename_language (const char *ext
, enum language lang
)
2670 filename_language_table
.emplace_back (ext
, lang
);
2673 static char *ext_args
;
2675 show_ext_args (struct ui_file
*file
, int from_tty
,
2676 struct cmd_list_element
*c
, const char *value
)
2678 fprintf_filtered (file
,
2679 _("Mapping between filename extension "
2680 "and source language is \"%s\".\n"),
2685 set_ext_lang_command (const char *args
,
2686 int from_tty
, struct cmd_list_element
*e
)
2688 char *cp
= ext_args
;
2691 /* First arg is filename extension, starting with '.' */
2693 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2695 /* Find end of first arg. */
2696 while (*cp
&& !isspace (*cp
))
2700 error (_("'%s': two arguments required -- "
2701 "filename extension and language"),
2704 /* Null-terminate first arg. */
2707 /* Find beginning of second arg, which should be a source language. */
2708 cp
= skip_spaces (cp
);
2711 error (_("'%s': two arguments required -- "
2712 "filename extension and language"),
2715 /* Lookup the language from among those we know. */
2716 lang
= language_enum (cp
);
2718 auto it
= filename_language_table
.begin ();
2719 /* Now lookup the filename extension: do we already know it? */
2720 for (; it
!= filename_language_table
.end (); it
++)
2722 if (it
->ext
== ext_args
)
2726 if (it
== filename_language_table
.end ())
2728 /* New file extension. */
2729 add_filename_language (ext_args
, lang
);
2733 /* Redefining a previously known filename extension. */
2736 /* query ("Really make files of type %s '%s'?", */
2737 /* ext_args, language_str (lang)); */
2744 info_ext_lang_command (const char *args
, int from_tty
)
2746 printf_filtered (_("Filename extensions and the languages they represent:"));
2747 printf_filtered ("\n\n");
2748 for (const filename_language
&entry
: filename_language_table
)
2749 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2750 language_str (entry
.lang
));
2754 deduce_language_from_filename (const char *filename
)
2758 if (filename
!= NULL
)
2759 if ((cp
= strrchr (filename
, '.')) != NULL
)
2761 for (const filename_language
&entry
: filename_language_table
)
2762 if (entry
.ext
== cp
)
2766 return language_unknown
;
2769 /* Allocate and initialize a new symbol table.
2770 CUST is from the result of allocate_compunit_symtab. */
2773 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2775 struct objfile
*objfile
= cust
->objfile
;
2776 struct symtab
*symtab
2777 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2780 = ((const char *) objfile
->per_bfd
->filename_cache
.insert
2781 (filename
, strlen (filename
) + 1));
2782 symtab
->fullname
= NULL
;
2783 symtab
->language
= deduce_language_from_filename (filename
);
2785 /* This can be very verbose with lots of headers.
2786 Only print at higher debug levels. */
2787 if (symtab_create_debug
>= 2)
2789 /* Be a bit clever with debugging messages, and don't print objfile
2790 every time, only when it changes. */
2791 static char *last_objfile_name
= NULL
;
2793 if (last_objfile_name
== NULL
2794 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2796 xfree (last_objfile_name
);
2797 last_objfile_name
= xstrdup (objfile_name (objfile
));
2798 fprintf_filtered (gdb_stdlog
,
2799 "Creating one or more symtabs for objfile %s ...\n",
2802 fprintf_filtered (gdb_stdlog
,
2803 "Created symtab %s for module %s.\n",
2804 host_address_to_string (symtab
), filename
);
2807 /* Add it to CUST's list of symtabs. */
2808 if (cust
->filetabs
== NULL
)
2810 cust
->filetabs
= symtab
;
2811 cust
->last_filetab
= symtab
;
2815 cust
->last_filetab
->next
= symtab
;
2816 cust
->last_filetab
= symtab
;
2819 /* Backlink to the containing compunit symtab. */
2820 symtab
->compunit_symtab
= cust
;
2825 /* Allocate and initialize a new compunit.
2826 NAME is the name of the main source file, if there is one, or some
2827 descriptive text if there are no source files. */
2829 struct compunit_symtab
*
2830 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2832 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2833 struct compunit_symtab
);
2834 const char *saved_name
;
2836 cu
->objfile
= objfile
;
2838 /* The name we record here is only for display/debugging purposes.
2839 Just save the basename to avoid path issues (too long for display,
2840 relative vs absolute, etc.). */
2841 saved_name
= lbasename (name
);
2842 cu
->name
= obstack_strdup (&objfile
->objfile_obstack
, saved_name
);
2844 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2846 if (symtab_create_debug
)
2848 fprintf_filtered (gdb_stdlog
,
2849 "Created compunit symtab %s for %s.\n",
2850 host_address_to_string (cu
),
2857 /* Hook CU to the objfile it comes from. */
2860 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2862 cu
->next
= cu
->objfile
->compunit_symtabs
;
2863 cu
->objfile
->compunit_symtabs
= cu
;
2867 /* Reset all data structures in gdb which may contain references to
2868 symbol table data. */
2871 clear_symtab_users (symfile_add_flags add_flags
)
2873 /* Someday, we should do better than this, by only blowing away
2874 the things that really need to be blown. */
2876 /* Clear the "current" symtab first, because it is no longer valid.
2877 breakpoint_re_set may try to access the current symtab. */
2878 clear_current_source_symtab_and_line ();
2881 clear_last_displayed_sal ();
2882 clear_pc_function_cache ();
2883 gdb::observers::new_objfile
.notify (NULL
);
2885 /* Varobj may refer to old symbols, perform a cleanup. */
2886 varobj_invalidate ();
2888 /* Now that the various caches have been cleared, we can re_set
2889 our breakpoints without risking it using stale data. */
2890 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2891 breakpoint_re_set ();
2895 The following code implements an abstraction for debugging overlay sections.
2897 The target model is as follows:
2898 1) The gnu linker will permit multiple sections to be mapped into the
2899 same VMA, each with its own unique LMA (or load address).
2900 2) It is assumed that some runtime mechanism exists for mapping the
2901 sections, one by one, from the load address into the VMA address.
2902 3) This code provides a mechanism for gdb to keep track of which
2903 sections should be considered to be mapped from the VMA to the LMA.
2904 This information is used for symbol lookup, and memory read/write.
2905 For instance, if a section has been mapped then its contents
2906 should be read from the VMA, otherwise from the LMA.
2908 Two levels of debugger support for overlays are available. One is
2909 "manual", in which the debugger relies on the user to tell it which
2910 overlays are currently mapped. This level of support is
2911 implemented entirely in the core debugger, and the information about
2912 whether a section is mapped is kept in the objfile->obj_section table.
2914 The second level of support is "automatic", and is only available if
2915 the target-specific code provides functionality to read the target's
2916 overlay mapping table, and translate its contents for the debugger
2917 (by updating the mapped state information in the obj_section tables).
2919 The interface is as follows:
2921 overlay map <name> -- tell gdb to consider this section mapped
2922 overlay unmap <name> -- tell gdb to consider this section unmapped
2923 overlay list -- list the sections that GDB thinks are mapped
2924 overlay read-target -- get the target's state of what's mapped
2925 overlay off/manual/auto -- set overlay debugging state
2926 Functional interface:
2927 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2928 section, return that section.
2929 find_pc_overlay(pc): find any overlay section that contains
2930 the pc, either in its VMA or its LMA
2931 section_is_mapped(sect): true if overlay is marked as mapped
2932 section_is_overlay(sect): true if section's VMA != LMA
2933 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2934 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2935 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2936 overlay_mapped_address(...): map an address from section's LMA to VMA
2937 overlay_unmapped_address(...): map an address from section's VMA to LMA
2938 symbol_overlayed_address(...): Return a "current" address for symbol:
2939 either in VMA or LMA depending on whether
2940 the symbol's section is currently mapped. */
2942 /* Overlay debugging state: */
2944 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2945 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2947 /* Function: section_is_overlay (SECTION)
2948 Returns true if SECTION has VMA not equal to LMA, ie.
2949 SECTION is loaded at an address different from where it will "run". */
2952 section_is_overlay (struct obj_section
*section
)
2954 if (overlay_debugging
&& section
)
2956 asection
*bfd_section
= section
->the_bfd_section
;
2958 if (bfd_section_lma (bfd_section
) != 0
2959 && bfd_section_lma (bfd_section
) != bfd_section_vma (bfd_section
))
2966 /* Function: overlay_invalidate_all (void)
2967 Invalidate the mapped state of all overlay sections (mark it as stale). */
2970 overlay_invalidate_all (void)
2972 struct obj_section
*sect
;
2974 for (objfile
*objfile
: current_program_space
->objfiles ())
2975 ALL_OBJFILE_OSECTIONS (objfile
, sect
)
2976 if (section_is_overlay (sect
))
2977 sect
->ovly_mapped
= -1;
2980 /* Function: section_is_mapped (SECTION)
2981 Returns true if section is an overlay, and is currently mapped.
2983 Access to the ovly_mapped flag is restricted to this function, so
2984 that we can do automatic update. If the global flag
2985 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2986 overlay_invalidate_all. If the mapped state of the particular
2987 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2990 section_is_mapped (struct obj_section
*osect
)
2992 struct gdbarch
*gdbarch
;
2994 if (osect
== 0 || !section_is_overlay (osect
))
2997 switch (overlay_debugging
)
3001 return 0; /* overlay debugging off */
3002 case ovly_auto
: /* overlay debugging automatic */
3003 /* Unles there is a gdbarch_overlay_update function,
3004 there's really nothing useful to do here (can't really go auto). */
3005 gdbarch
= get_objfile_arch (osect
->objfile
);
3006 if (gdbarch_overlay_update_p (gdbarch
))
3008 if (overlay_cache_invalid
)
3010 overlay_invalidate_all ();
3011 overlay_cache_invalid
= 0;
3013 if (osect
->ovly_mapped
== -1)
3014 gdbarch_overlay_update (gdbarch
, osect
);
3017 case ovly_on
: /* overlay debugging manual */
3018 return osect
->ovly_mapped
== 1;
3022 /* Function: pc_in_unmapped_range
3023 If PC falls into the lma range of SECTION, return true, else false. */
3026 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3028 if (section_is_overlay (section
))
3030 asection
*bfd_section
= section
->the_bfd_section
;
3032 /* We assume the LMA is relocated by the same offset as the VMA. */
3033 bfd_vma size
= bfd_section_size (bfd_section
);
3034 CORE_ADDR offset
= obj_section_offset (section
);
3036 if (bfd_section_lma (bfd_section
) + offset
<= pc
3037 && pc
< bfd_section_lma (bfd_section
) + offset
+ size
)
3044 /* Function: pc_in_mapped_range
3045 If PC falls into the vma range of SECTION, return true, else false. */
3048 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3050 if (section_is_overlay (section
))
3052 if (obj_section_addr (section
) <= pc
3053 && pc
< obj_section_endaddr (section
))
3060 /* Return true if the mapped ranges of sections A and B overlap, false
3064 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3066 CORE_ADDR a_start
= obj_section_addr (a
);
3067 CORE_ADDR a_end
= obj_section_endaddr (a
);
3068 CORE_ADDR b_start
= obj_section_addr (b
);
3069 CORE_ADDR b_end
= obj_section_endaddr (b
);
3071 return (a_start
< b_end
&& b_start
< a_end
);
3074 /* Function: overlay_unmapped_address (PC, SECTION)
3075 Returns the address corresponding to PC in the unmapped (load) range.
3076 May be the same as PC. */
3079 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3081 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3083 asection
*bfd_section
= section
->the_bfd_section
;
3085 return (pc
+ bfd_section_lma (bfd_section
)
3086 - bfd_section_vma (bfd_section
));
3092 /* Function: overlay_mapped_address (PC, SECTION)
3093 Returns the address corresponding to PC in the mapped (runtime) range.
3094 May be the same as PC. */
3097 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3099 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3101 asection
*bfd_section
= section
->the_bfd_section
;
3103 return (pc
+ bfd_section_vma (bfd_section
)
3104 - bfd_section_lma (bfd_section
));
3110 /* Function: symbol_overlayed_address
3111 Return one of two addresses (relative to the VMA or to the LMA),
3112 depending on whether the section is mapped or not. */
3115 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3117 if (overlay_debugging
)
3119 /* If the symbol has no section, just return its regular address. */
3122 /* If the symbol's section is not an overlay, just return its
3124 if (!section_is_overlay (section
))
3126 /* If the symbol's section is mapped, just return its address. */
3127 if (section_is_mapped (section
))
3130 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3131 * then return its LOADED address rather than its vma address!!
3133 return overlay_unmapped_address (address
, section
);
3138 /* Function: find_pc_overlay (PC)
3139 Return the best-match overlay section for PC:
3140 If PC matches a mapped overlay section's VMA, return that section.
3141 Else if PC matches an unmapped section's VMA, return that section.
3142 Else if PC matches an unmapped section's LMA, return that section. */
3144 struct obj_section
*
3145 find_pc_overlay (CORE_ADDR pc
)
3147 struct obj_section
*osect
, *best_match
= NULL
;
3149 if (overlay_debugging
)
3151 for (objfile
*objfile
: current_program_space
->objfiles ())
3152 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3153 if (section_is_overlay (osect
))
3155 if (pc_in_mapped_range (pc
, osect
))
3157 if (section_is_mapped (osect
))
3162 else if (pc_in_unmapped_range (pc
, osect
))
3169 /* Function: find_pc_mapped_section (PC)
3170 If PC falls into the VMA address range of an overlay section that is
3171 currently marked as MAPPED, return that section. Else return NULL. */
3173 struct obj_section
*
3174 find_pc_mapped_section (CORE_ADDR pc
)
3176 struct obj_section
*osect
;
3178 if (overlay_debugging
)
3180 for (objfile
*objfile
: current_program_space
->objfiles ())
3181 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3182 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3189 /* Function: list_overlays_command
3190 Print a list of mapped sections and their PC ranges. */
3193 list_overlays_command (const char *args
, int from_tty
)
3196 struct obj_section
*osect
;
3198 if (overlay_debugging
)
3200 for (objfile
*objfile
: current_program_space
->objfiles ())
3201 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3202 if (section_is_mapped (osect
))
3204 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3209 vma
= bfd_section_vma (osect
->the_bfd_section
);
3210 lma
= bfd_section_lma (osect
->the_bfd_section
);
3211 size
= bfd_section_size (osect
->the_bfd_section
);
3212 name
= bfd_section_name (osect
->the_bfd_section
);
3214 printf_filtered ("Section %s, loaded at ", name
);
3215 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3216 puts_filtered (" - ");
3217 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3218 printf_filtered (", mapped at ");
3219 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3220 puts_filtered (" - ");
3221 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3222 puts_filtered ("\n");
3228 printf_filtered (_("No sections are mapped.\n"));
3231 /* Function: map_overlay_command
3232 Mark the named section as mapped (ie. residing at its VMA address). */
3235 map_overlay_command (const char *args
, int from_tty
)
3237 struct obj_section
*sec
, *sec2
;
3239 if (!overlay_debugging
)
3240 error (_("Overlay debugging not enabled. Use "
3241 "either the 'overlay auto' or\n"
3242 "the 'overlay manual' command."));
3244 if (args
== 0 || *args
== 0)
3245 error (_("Argument required: name of an overlay section"));
3247 /* First, find a section matching the user supplied argument. */
3248 for (objfile
*obj_file
: current_program_space
->objfiles ())
3249 ALL_OBJFILE_OSECTIONS (obj_file
, sec
)
3250 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3252 /* Now, check to see if the section is an overlay. */
3253 if (!section_is_overlay (sec
))
3254 continue; /* not an overlay section */
3256 /* Mark the overlay as "mapped". */
3257 sec
->ovly_mapped
= 1;
3259 /* Next, make a pass and unmap any sections that are
3260 overlapped by this new section: */
3261 for (objfile
*objfile2
: current_program_space
->objfiles ())
3262 ALL_OBJFILE_OSECTIONS (objfile2
, sec2
)
3263 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
,
3267 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3268 bfd_section_name (sec2
->the_bfd_section
));
3269 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3273 error (_("No overlay section called %s"), args
);
3276 /* Function: unmap_overlay_command
3277 Mark the overlay section as unmapped
3278 (ie. resident in its LMA address range, rather than the VMA range). */
3281 unmap_overlay_command (const char *args
, int from_tty
)
3283 struct obj_section
*sec
= NULL
;
3285 if (!overlay_debugging
)
3286 error (_("Overlay debugging not enabled. "
3287 "Use either the 'overlay auto' or\n"
3288 "the 'overlay manual' command."));
3290 if (args
== 0 || *args
== 0)
3291 error (_("Argument required: name of an overlay section"));
3293 /* First, find a section matching the user supplied argument. */
3294 for (objfile
*objfile
: current_program_space
->objfiles ())
3295 ALL_OBJFILE_OSECTIONS (objfile
, sec
)
3296 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3298 if (!sec
->ovly_mapped
)
3299 error (_("Section %s is not mapped"), args
);
3300 sec
->ovly_mapped
= 0;
3303 error (_("No overlay section called %s"), args
);
3306 /* Function: overlay_auto_command
3307 A utility command to turn on overlay debugging.
3308 Possibly this should be done via a set/show command. */
3311 overlay_auto_command (const char *args
, int from_tty
)
3313 overlay_debugging
= ovly_auto
;
3314 enable_overlay_breakpoints ();
3316 printf_unfiltered (_("Automatic overlay debugging enabled."));
3319 /* Function: overlay_manual_command
3320 A utility command to turn on overlay debugging.
3321 Possibly this should be done via a set/show command. */
3324 overlay_manual_command (const char *args
, int from_tty
)
3326 overlay_debugging
= ovly_on
;
3327 disable_overlay_breakpoints ();
3329 printf_unfiltered (_("Overlay debugging enabled."));
3332 /* Function: overlay_off_command
3333 A utility command to turn on overlay debugging.
3334 Possibly this should be done via a set/show command. */
3337 overlay_off_command (const char *args
, int from_tty
)
3339 overlay_debugging
= ovly_off
;
3340 disable_overlay_breakpoints ();
3342 printf_unfiltered (_("Overlay debugging disabled."));
3346 overlay_load_command (const char *args
, int from_tty
)
3348 struct gdbarch
*gdbarch
= get_current_arch ();
3350 if (gdbarch_overlay_update_p (gdbarch
))
3351 gdbarch_overlay_update (gdbarch
, NULL
);
3353 error (_("This target does not know how to read its overlay state."));
3356 /* Function: overlay_command
3357 A place-holder for a mis-typed command. */
3359 /* Command list chain containing all defined "overlay" subcommands. */
3360 static struct cmd_list_element
*overlaylist
;
3363 overlay_command (const char *args
, int from_tty
)
3366 ("\"overlay\" must be followed by the name of an overlay command.\n");
3367 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3370 /* Target Overlays for the "Simplest" overlay manager:
3372 This is GDB's default target overlay layer. It works with the
3373 minimal overlay manager supplied as an example by Cygnus. The
3374 entry point is via a function pointer "gdbarch_overlay_update",
3375 so targets that use a different runtime overlay manager can
3376 substitute their own overlay_update function and take over the
3379 The overlay_update function pokes around in the target's data structures
3380 to see what overlays are mapped, and updates GDB's overlay mapping with
3383 In this simple implementation, the target data structures are as follows:
3384 unsigned _novlys; /# number of overlay sections #/
3385 unsigned _ovly_table[_novlys][4] = {
3386 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3387 {..., ..., ..., ...},
3389 unsigned _novly_regions; /# number of overlay regions #/
3390 unsigned _ovly_region_table[_novly_regions][3] = {
3391 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3394 These functions will attempt to update GDB's mappedness state in the
3395 symbol section table, based on the target's mappedness state.
3397 To do this, we keep a cached copy of the target's _ovly_table, and
3398 attempt to detect when the cached copy is invalidated. The main
3399 entry point is "simple_overlay_update(SECT), which looks up SECT in
3400 the cached table and re-reads only the entry for that section from
3401 the target (whenever possible). */
3403 /* Cached, dynamically allocated copies of the target data structures: */
3404 static unsigned (*cache_ovly_table
)[4] = 0;
3405 static unsigned cache_novlys
= 0;
3406 static CORE_ADDR cache_ovly_table_base
= 0;
3409 VMA
, OSIZE
, LMA
, MAPPED
3412 /* Throw away the cached copy of _ovly_table. */
3415 simple_free_overlay_table (void)
3417 if (cache_ovly_table
)
3418 xfree (cache_ovly_table
);
3420 cache_ovly_table
= NULL
;
3421 cache_ovly_table_base
= 0;
3424 /* Read an array of ints of size SIZE from the target into a local buffer.
3425 Convert to host order. int LEN is number of ints. */
3428 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3429 int len
, int size
, enum bfd_endian byte_order
)
3431 /* FIXME (alloca): Not safe if array is very large. */
3432 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3435 read_memory (memaddr
, buf
, len
* size
);
3436 for (i
= 0; i
< len
; i
++)
3437 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3440 /* Find and grab a copy of the target _ovly_table
3441 (and _novlys, which is needed for the table's size). */
3444 simple_read_overlay_table (void)
3446 struct bound_minimal_symbol novlys_msym
;
3447 struct bound_minimal_symbol ovly_table_msym
;
3448 struct gdbarch
*gdbarch
;
3450 enum bfd_endian byte_order
;
3452 simple_free_overlay_table ();
3453 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3454 if (! novlys_msym
.minsym
)
3456 error (_("Error reading inferior's overlay table: "
3457 "couldn't find `_novlys' variable\n"
3458 "in inferior. Use `overlay manual' mode."));
3462 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3463 if (! ovly_table_msym
.minsym
)
3465 error (_("Error reading inferior's overlay table: couldn't find "
3466 "`_ovly_table' array\n"
3467 "in inferior. Use `overlay manual' mode."));
3471 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3472 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3473 byte_order
= gdbarch_byte_order (gdbarch
);
3475 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3478 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3479 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3480 read_target_long_array (cache_ovly_table_base
,
3481 (unsigned int *) cache_ovly_table
,
3482 cache_novlys
* 4, word_size
, byte_order
);
3484 return 1; /* SUCCESS */
3487 /* Function: simple_overlay_update_1
3488 A helper function for simple_overlay_update. Assuming a cached copy
3489 of _ovly_table exists, look through it to find an entry whose vma,
3490 lma and size match those of OSECT. Re-read the entry and make sure
3491 it still matches OSECT (else the table may no longer be valid).
3492 Set OSECT's mapped state to match the entry. Return: 1 for
3493 success, 0 for failure. */
3496 simple_overlay_update_1 (struct obj_section
*osect
)
3499 asection
*bsect
= osect
->the_bfd_section
;
3500 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3501 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3502 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3504 for (i
= 0; i
< cache_novlys
; i
++)
3505 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3506 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3508 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3509 (unsigned int *) cache_ovly_table
[i
],
3510 4, word_size
, byte_order
);
3511 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3512 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3514 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3517 else /* Warning! Warning! Target's ovly table has changed! */
3523 /* Function: simple_overlay_update
3524 If OSECT is NULL, then update all sections' mapped state
3525 (after re-reading the entire target _ovly_table).
3526 If OSECT is non-NULL, then try to find a matching entry in the
3527 cached ovly_table and update only OSECT's mapped state.
3528 If a cached entry can't be found or the cache isn't valid, then
3529 re-read the entire cache, and go ahead and update all sections. */
3532 simple_overlay_update (struct obj_section
*osect
)
3534 /* Were we given an osect to look up? NULL means do all of them. */
3536 /* Have we got a cached copy of the target's overlay table? */
3537 if (cache_ovly_table
!= NULL
)
3539 /* Does its cached location match what's currently in the
3541 struct bound_minimal_symbol minsym
3542 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3544 if (minsym
.minsym
== NULL
)
3545 error (_("Error reading inferior's overlay table: couldn't "
3546 "find `_ovly_table' array\n"
3547 "in inferior. Use `overlay manual' mode."));
3549 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3550 /* Then go ahead and try to look up this single section in
3552 if (simple_overlay_update_1 (osect
))
3553 /* Found it! We're done. */
3557 /* Cached table no good: need to read the entire table anew.
3558 Or else we want all the sections, in which case it's actually
3559 more efficient to read the whole table in one block anyway. */
3561 if (! simple_read_overlay_table ())
3564 /* Now may as well update all sections, even if only one was requested. */
3565 for (objfile
*objfile
: current_program_space
->objfiles ())
3566 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3567 if (section_is_overlay (osect
))
3570 asection
*bsect
= osect
->the_bfd_section
;
3572 for (i
= 0; i
< cache_novlys
; i
++)
3573 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3574 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3575 { /* obj_section matches i'th entry in ovly_table. */
3576 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3577 break; /* finished with inner for loop: break out. */
3582 /* Set the output sections and output offsets for section SECTP in
3583 ABFD. The relocation code in BFD will read these offsets, so we
3584 need to be sure they're initialized. We map each section to itself,
3585 with no offset; this means that SECTP->vma will be honored. */
3588 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3590 sectp
->output_section
= sectp
;
3591 sectp
->output_offset
= 0;
3594 /* Default implementation for sym_relocate. */
3597 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3600 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3602 bfd
*abfd
= sectp
->owner
;
3604 /* We're only interested in sections with relocation
3606 if ((sectp
->flags
& SEC_RELOC
) == 0)
3609 /* We will handle section offsets properly elsewhere, so relocate as if
3610 all sections begin at 0. */
3611 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3613 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3616 /* Relocate the contents of a debug section SECTP in ABFD. The
3617 contents are stored in BUF if it is non-NULL, or returned in a
3618 malloc'd buffer otherwise.
3620 For some platforms and debug info formats, shared libraries contain
3621 relocations against the debug sections (particularly for DWARF-2;
3622 one affected platform is PowerPC GNU/Linux, although it depends on
3623 the version of the linker in use). Also, ELF object files naturally
3624 have unresolved relocations for their debug sections. We need to apply
3625 the relocations in order to get the locations of symbols correct.
3626 Another example that may require relocation processing, is the
3627 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3631 symfile_relocate_debug_section (struct objfile
*objfile
,
3632 asection
*sectp
, bfd_byte
*buf
)
3634 gdb_assert (objfile
->sf
->sym_relocate
);
3636 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3639 struct symfile_segment_data
*
3640 get_symfile_segment_data (bfd
*abfd
)
3642 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3647 return sf
->sym_segments (abfd
);
3651 free_symfile_segment_data (struct symfile_segment_data
*data
)
3653 xfree (data
->segment_bases
);
3654 xfree (data
->segment_sizes
);
3655 xfree (data
->segment_info
);
3660 - DATA, containing segment addresses from the object file ABFD, and
3661 the mapping from ABFD's sections onto the segments that own them,
3663 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3664 segment addresses reported by the target,
3665 store the appropriate offsets for each section in OFFSETS.
3667 If there are fewer entries in SEGMENT_BASES than there are segments
3668 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3670 If there are more entries, then ignore the extra. The target may
3671 not be able to distinguish between an empty data segment and a
3672 missing data segment; a missing text segment is less plausible. */
3675 symfile_map_offsets_to_segments (bfd
*abfd
,
3676 const struct symfile_segment_data
*data
,
3677 section_offsets
&offsets
,
3678 int num_segment_bases
,
3679 const CORE_ADDR
*segment_bases
)
3684 /* It doesn't make sense to call this function unless you have some
3685 segment base addresses. */
3686 gdb_assert (num_segment_bases
> 0);
3688 /* If we do not have segment mappings for the object file, we
3689 can not relocate it by segments. */
3690 gdb_assert (data
!= NULL
);
3691 gdb_assert (data
->num_segments
> 0);
3693 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3695 int which
= data
->segment_info
[i
];
3697 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3699 /* Don't bother computing offsets for sections that aren't
3700 loaded as part of any segment. */
3704 /* Use the last SEGMENT_BASES entry as the address of any extra
3705 segments mentioned in DATA->segment_info. */
3706 if (which
> num_segment_bases
)
3707 which
= num_segment_bases
;
3709 offsets
[i
] = segment_bases
[which
- 1] - data
->segment_bases
[which
- 1];
3716 symfile_find_segment_sections (struct objfile
*objfile
)
3718 bfd
*abfd
= objfile
->obfd
;
3721 struct symfile_segment_data
*data
;
3723 data
= get_symfile_segment_data (objfile
->obfd
);
3727 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3729 free_symfile_segment_data (data
);
3733 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3735 int which
= data
->segment_info
[i
];
3739 if (objfile
->sect_index_text
== -1)
3740 objfile
->sect_index_text
= sect
->index
;
3742 if (objfile
->sect_index_rodata
== -1)
3743 objfile
->sect_index_rodata
= sect
->index
;
3745 else if (which
== 2)
3747 if (objfile
->sect_index_data
== -1)
3748 objfile
->sect_index_data
= sect
->index
;
3750 if (objfile
->sect_index_bss
== -1)
3751 objfile
->sect_index_bss
= sect
->index
;
3755 free_symfile_segment_data (data
);
3758 /* Listen for free_objfile events. */
3761 symfile_free_objfile (struct objfile
*objfile
)
3763 /* Remove the target sections owned by this objfile. */
3764 if (objfile
!= NULL
)
3765 remove_target_sections ((void *) objfile
);
3768 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3769 Expand all symtabs that match the specified criteria.
3770 See quick_symbol_functions.expand_symtabs_matching for details. */
3773 expand_symtabs_matching
3774 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3775 const lookup_name_info
&lookup_name
,
3776 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3777 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3778 enum search_domain kind
)
3780 for (objfile
*objfile
: current_program_space
->objfiles ())
3783 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3786 expansion_notify
, kind
);
3790 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3791 Map function FUN over every file.
3792 See quick_symbol_functions.map_symbol_filenames for details. */
3795 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3798 for (objfile
*objfile
: current_program_space
->objfiles ())
3801 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3808 namespace selftests
{
3809 namespace filename_language
{
3811 static void test_filename_language ()
3813 /* This test messes up the filename_language_table global. */
3814 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3816 /* Test deducing an unknown extension. */
3817 language lang
= deduce_language_from_filename ("myfile.blah");
3818 SELF_CHECK (lang
== language_unknown
);
3820 /* Test deducing a known extension. */
3821 lang
= deduce_language_from_filename ("myfile.c");
3822 SELF_CHECK (lang
== language_c
);
3824 /* Test adding a new extension using the internal API. */
3825 add_filename_language (".blah", language_pascal
);
3826 lang
= deduce_language_from_filename ("myfile.blah");
3827 SELF_CHECK (lang
== language_pascal
);
3831 test_set_ext_lang_command ()
3833 /* This test messes up the filename_language_table global. */
3834 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3836 /* Confirm that the .hello extension is not known. */
3837 language lang
= deduce_language_from_filename ("cake.hello");
3838 SELF_CHECK (lang
== language_unknown
);
3840 /* Test adding a new extension using the CLI command. */
3841 auto args_holder
= make_unique_xstrdup (".hello rust");
3842 ext_args
= args_holder
.get ();
3843 set_ext_lang_command (NULL
, 1, NULL
);
3845 lang
= deduce_language_from_filename ("cake.hello");
3846 SELF_CHECK (lang
== language_rust
);
3848 /* Test overriding an existing extension using the CLI command. */
3849 int size_before
= filename_language_table
.size ();
3850 args_holder
.reset (xstrdup (".hello pascal"));
3851 ext_args
= args_holder
.get ();
3852 set_ext_lang_command (NULL
, 1, NULL
);
3853 int size_after
= filename_language_table
.size ();
3855 lang
= deduce_language_from_filename ("cake.hello");
3856 SELF_CHECK (lang
== language_pascal
);
3857 SELF_CHECK (size_before
== size_after
);
3860 } /* namespace filename_language */
3861 } /* namespace selftests */
3863 #endif /* GDB_SELF_TEST */
3866 _initialize_symfile (void)
3868 struct cmd_list_element
*c
;
3870 gdb::observers::free_objfile
.attach (symfile_free_objfile
);
3872 #define READNOW_READNEVER_HELP \
3873 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3874 immediately. This makes the command slower, but may make future operations\n\
3876 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3877 symbolic debug information."
3879 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3880 Load symbol table from executable file FILE.\n\
3881 Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
3882 OFF is an optional offset which is added to each section address.\n\
3883 The `file' command can also load symbol tables, as well as setting the file\n\
3884 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3885 set_cmd_completer (c
, filename_completer
);
3887 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3888 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3889 Usage: add-symbol-file FILE [-readnow | -readnever] [-o OFF] [ADDR] \
3890 [-s SECT-NAME SECT-ADDR]...\n\
3891 ADDR is the starting address of the file's text.\n\
3892 Each '-s' argument provides a section name and address, and\n\
3893 should be specified if the data and bss segments are not contiguous\n\
3894 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n\
3895 OFF is an optional offset which is added to the default load addresses\n\
3896 of all sections for which no other address was specified.\n"
3897 READNOW_READNEVER_HELP
),
3899 set_cmd_completer (c
, filename_completer
);
3901 c
= add_cmd ("remove-symbol-file", class_files
,
3902 remove_symbol_file_command
, _("\
3903 Remove a symbol file added via the add-symbol-file command.\n\
3904 Usage: remove-symbol-file FILENAME\n\
3905 remove-symbol-file -a ADDRESS\n\
3906 The file to remove can be identified by its filename or by an address\n\
3907 that lies within the boundaries of this symbol file in memory."),
3910 c
= add_cmd ("load", class_files
, load_command
, _("\
3911 Dynamically load FILE into the running program.\n\
3912 FILE symbols are recorded for access from GDB.\n\
3913 Usage: load [FILE] [OFFSET]\n\
3914 An optional load OFFSET may also be given as a literal address.\n\
3915 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3916 on its own."), &cmdlist
);
3917 set_cmd_completer (c
, filename_completer
);
3919 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3920 _("Commands for debugging overlays."), &overlaylist
,
3921 "overlay ", 0, &cmdlist
);
3923 add_com_alias ("ovly", "overlay", class_alias
, 1);
3924 add_com_alias ("ov", "overlay", class_alias
, 1);
3926 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3927 _("Assert that an overlay section is mapped."), &overlaylist
);
3929 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3930 _("Assert that an overlay section is unmapped."), &overlaylist
);
3932 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3933 _("List mappings of overlay sections."), &overlaylist
);
3935 add_cmd ("manual", class_support
, overlay_manual_command
,
3936 _("Enable overlay debugging."), &overlaylist
);
3937 add_cmd ("off", class_support
, overlay_off_command
,
3938 _("Disable overlay debugging."), &overlaylist
);
3939 add_cmd ("auto", class_support
, overlay_auto_command
,
3940 _("Enable automatic overlay debugging."), &overlaylist
);
3941 add_cmd ("load-target", class_support
, overlay_load_command
,
3942 _("Read the overlay mapping state from the target."), &overlaylist
);
3944 /* Filename extension to source language lookup table: */
3945 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3947 Set mapping between filename extension and source language."), _("\
3948 Show mapping between filename extension and source language."), _("\
3949 Usage: set extension-language .foo bar"),
3950 set_ext_lang_command
,
3952 &setlist
, &showlist
);
3954 add_info ("extensions", info_ext_lang_command
,
3955 _("All filename extensions associated with a source language."));
3957 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3958 &debug_file_directory
, _("\
3959 Set the directories where separate debug symbols are searched for."), _("\
3960 Show the directories where separate debug symbols are searched for."), _("\
3961 Separate debug symbols are first searched for in the same\n\
3962 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3963 and lastly at the path of the directory of the binary with\n\
3964 each global debug-file-directory component prepended."),
3966 show_debug_file_directory
,
3967 &setlist
, &showlist
);
3969 add_setshow_enum_cmd ("symbol-loading", no_class
,
3970 print_symbol_loading_enums
, &print_symbol_loading
,
3972 Set printing of symbol loading messages."), _("\
3973 Show printing of symbol loading messages."), _("\
3974 off == turn all messages off\n\
3975 brief == print messages for the executable,\n\
3976 and brief messages for shared libraries\n\
3977 full == print messages for the executable,\n\
3978 and messages for each shared library."),
3981 &setprintlist
, &showprintlist
);
3983 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3984 &separate_debug_file_debug
, _("\
3985 Set printing of separate debug info file search debug."), _("\
3986 Show printing of separate debug info file search debug."), _("\
3987 When on, GDB prints the searched locations while looking for separate debug \
3988 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
3991 selftests::register_test
3992 ("filename_language", selftests::filename_language::test_filename_language
);
3993 selftests::register_test
3994 ("set_ext_lang_command",
3995 selftests::filename_language::test_set_ext_lang_command
);