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 clear_symtab_users (0);
1248 gdb_assert (symfile_objfile
== NULL
);
1250 printf_filtered (_("No symbol file now.\n"));
1253 /* See symfile.h. */
1255 bool separate_debug_file_debug
= false;
1258 separate_debug_file_exists (const std::string
&name
, unsigned long crc
,
1259 struct objfile
*parent_objfile
)
1261 unsigned long file_crc
;
1263 struct stat parent_stat
, abfd_stat
;
1264 int verified_as_different
;
1266 /* Find a separate debug info file as if symbols would be present in
1267 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1268 section can contain just the basename of PARENT_OBJFILE without any
1269 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1270 the separate debug infos with the same basename can exist. */
1272 if (filename_cmp (name
.c_str (), objfile_name (parent_objfile
)) == 0)
1275 if (separate_debug_file_debug
)
1277 printf_filtered (_(" Trying %s..."), name
.c_str ());
1278 gdb_flush (gdb_stdout
);
1281 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
.c_str (), gnutarget
, -1));
1285 if (separate_debug_file_debug
)
1286 printf_filtered (_(" no, unable to open.\n"));
1291 /* Verify symlinks were not the cause of filename_cmp name difference above.
1293 Some operating systems, e.g. Windows, do not provide a meaningful
1294 st_ino; they always set it to zero. (Windows does provide a
1295 meaningful st_dev.) Files accessed from gdbservers that do not
1296 support the vFile:fstat packet will also have st_ino set to zero.
1297 Do not indicate a duplicate library in either case. While there
1298 is no guarantee that a system that provides meaningful inode
1299 numbers will never set st_ino to zero, this is merely an
1300 optimization, so we do not need to worry about false negatives. */
1302 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1303 && abfd_stat
.st_ino
!= 0
1304 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1306 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1307 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1309 if (separate_debug_file_debug
)
1310 printf_filtered (_(" no, same file as the objfile.\n"));
1314 verified_as_different
= 1;
1317 verified_as_different
= 0;
1319 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1323 if (separate_debug_file_debug
)
1324 printf_filtered (_(" no, error computing CRC.\n"));
1329 if (crc
!= file_crc
)
1331 unsigned long parent_crc
;
1333 /* If the files could not be verified as different with
1334 bfd_stat then we need to calculate the parent's CRC
1335 to verify whether the files are different or not. */
1337 if (!verified_as_different
)
1339 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1341 if (separate_debug_file_debug
)
1342 printf_filtered (_(" no, error computing CRC.\n"));
1348 if (verified_as_different
|| parent_crc
!= file_crc
)
1349 warning (_("the debug information found in \"%s\""
1350 " does not match \"%s\" (CRC mismatch).\n"),
1351 name
.c_str (), objfile_name (parent_objfile
));
1353 if (separate_debug_file_debug
)
1354 printf_filtered (_(" no, CRC doesn't match.\n"));
1359 if (separate_debug_file_debug
)
1360 printf_filtered (_(" yes!\n"));
1365 char *debug_file_directory
= NULL
;
1367 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1368 struct cmd_list_element
*c
, const char *value
)
1370 fprintf_filtered (file
,
1371 _("The directory where separate debug "
1372 "symbols are searched for is \"%s\".\n"),
1376 #if ! defined (DEBUG_SUBDIRECTORY)
1377 #define DEBUG_SUBDIRECTORY ".debug"
1380 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1381 where the original file resides (may not be the same as
1382 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1383 looking for. CANON_DIR is the "realpath" form of DIR.
1384 DIR must contain a trailing '/'.
1385 Returns the path of the file with separate debug info, or an empty
1389 find_separate_debug_file (const char *dir
,
1390 const char *canon_dir
,
1391 const char *debuglink
,
1392 unsigned long crc32
, struct objfile
*objfile
)
1394 if (separate_debug_file_debug
)
1395 printf_filtered (_("\nLooking for separate debug info (debug link) for "
1396 "%s\n"), objfile_name (objfile
));
1398 /* First try in the same directory as the original file. */
1399 std::string debugfile
= dir
;
1400 debugfile
+= debuglink
;
1402 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1405 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1407 debugfile
+= DEBUG_SUBDIRECTORY
;
1409 debugfile
+= debuglink
;
1411 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1414 /* Then try in the global debugfile directories.
1416 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1417 cause "/..." lookups. */
1419 bool target_prefix
= startswith (dir
, "target:");
1420 const char *dir_notarget
= target_prefix
? dir
+ strlen ("target:") : dir
;
1421 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
1422 = dirnames_to_char_ptr_vec (debug_file_directory
);
1423 gdb::unique_xmalloc_ptr
<char> canon_sysroot
= gdb_realpath (gdb_sysroot
);
1425 /* MS-Windows/MS-DOS don't allow colons in file names; we must
1426 convert the drive letter into a one-letter directory, so that the
1427 file name resulting from splicing below will be valid.
1429 FIXME: The below only works when GDB runs on MS-Windows/MS-DOS.
1430 There are various remote-debugging scenarios where such a
1431 transformation of the drive letter might be required when GDB runs
1432 on a Posix host, see
1434 https://sourceware.org/ml/gdb-patches/2019-04/msg00605.html
1436 If some of those scenarios need to be supported, we will need to
1437 use a different condition for HAS_DRIVE_SPEC and a different macro
1438 instead of STRIP_DRIVE_SPEC, which work on Posix systems as well. */
1440 if (HAS_DRIVE_SPEC (dir_notarget
))
1442 drive
= dir_notarget
[0];
1443 dir_notarget
= STRIP_DRIVE_SPEC (dir_notarget
);
1446 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
1448 debugfile
= target_prefix
? "target:" : "";
1449 debugfile
+= debugdir
.get ();
1452 debugfile
+= dir_notarget
;
1453 debugfile
+= debuglink
;
1455 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1458 const char *base_path
= NULL
;
1459 if (canon_dir
!= NULL
)
1461 if (canon_sysroot
.get () != NULL
)
1462 base_path
= child_path (canon_sysroot
.get (), canon_dir
);
1464 base_path
= child_path (gdb_sysroot
, canon_dir
);
1466 if (base_path
!= NULL
)
1468 /* If the file is in the sysroot, try using its base path in
1469 the global debugfile directory. */
1470 debugfile
= target_prefix
? "target:" : "";
1471 debugfile
+= debugdir
.get ();
1473 debugfile
+= base_path
;
1475 debugfile
+= debuglink
;
1477 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1480 /* If the file is in the sysroot, try using its base path in
1481 the sysroot's global debugfile directory. */
1482 debugfile
= target_prefix
? "target:" : "";
1483 debugfile
+= gdb_sysroot
;
1484 debugfile
+= debugdir
.get ();
1486 debugfile
+= base_path
;
1488 debugfile
+= debuglink
;
1490 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1496 return std::string ();
1499 /* Modify PATH to contain only "[/]directory/" part of PATH.
1500 If there were no directory separators in PATH, PATH will be empty
1501 string on return. */
1504 terminate_after_last_dir_separator (char *path
)
1508 /* Strip off the final filename part, leaving the directory name,
1509 followed by a slash. The directory can be relative or absolute. */
1510 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1511 if (IS_DIR_SEPARATOR (path
[i
]))
1514 /* If I is -1 then no directory is present there and DIR will be "". */
1518 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1519 Returns pathname, or an empty string. */
1522 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1524 unsigned long crc32
;
1526 gdb::unique_xmalloc_ptr
<char> debuglink
1527 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1529 if (debuglink
== NULL
)
1531 /* There's no separate debug info, hence there's no way we could
1532 load it => no warning. */
1533 return std::string ();
1536 std::string dir
= objfile_name (objfile
);
1537 terminate_after_last_dir_separator (&dir
[0]);
1538 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1540 std::string debugfile
1541 = find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1542 debuglink
.get (), crc32
, objfile
);
1544 if (debugfile
.empty ())
1546 /* For PR gdb/9538, try again with realpath (if different from the
1551 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1552 && S_ISLNK (st_buf
.st_mode
))
1554 gdb::unique_xmalloc_ptr
<char> symlink_dir
1555 (lrealpath (objfile_name (objfile
)));
1556 if (symlink_dir
!= NULL
)
1558 terminate_after_last_dir_separator (symlink_dir
.get ());
1559 if (dir
!= symlink_dir
.get ())
1561 /* Different directory, so try using it. */
1562 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1575 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1579 validate_readnow_readnever (objfile_flags flags
)
1581 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1582 error (_("-readnow and -readnever cannot be used simultaneously"));
1585 /* This is the symbol-file command. Read the file, analyze its
1586 symbols, and add a struct symtab to a symtab list. The syntax of
1587 the command is rather bizarre:
1589 1. The function buildargv implements various quoting conventions
1590 which are undocumented and have little or nothing in common with
1591 the way things are quoted (or not quoted) elsewhere in GDB.
1593 2. Options are used, which are not generally used in GDB (perhaps
1594 "set mapped on", "set readnow on" would be better)
1596 3. The order of options matters, which is contrary to GNU
1597 conventions (because it is confusing and inconvenient). */
1600 symbol_file_command (const char *args
, int from_tty
)
1606 symbol_file_clear (from_tty
);
1610 objfile_flags flags
= OBJF_USERLOADED
;
1611 symfile_add_flags add_flags
= 0;
1613 bool stop_processing_options
= false;
1614 CORE_ADDR offset
= 0;
1619 add_flags
|= SYMFILE_VERBOSE
;
1621 gdb_argv
built_argv (args
);
1622 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1624 if (stop_processing_options
|| *arg
!= '-')
1629 error (_("Unrecognized argument \"%s\""), arg
);
1631 else if (strcmp (arg
, "-readnow") == 0)
1632 flags
|= OBJF_READNOW
;
1633 else if (strcmp (arg
, "-readnever") == 0)
1634 flags
|= OBJF_READNEVER
;
1635 else if (strcmp (arg
, "-o") == 0)
1637 arg
= built_argv
[++idx
];
1639 error (_("Missing argument to -o"));
1641 offset
= parse_and_eval_address (arg
);
1643 else if (strcmp (arg
, "--") == 0)
1644 stop_processing_options
= true;
1646 error (_("Unrecognized argument \"%s\""), arg
);
1650 error (_("no symbol file name was specified"));
1652 validate_readnow_readnever (flags
);
1654 /* Set SYMFILE_DEFER_BP_RESET because the proper displacement for a PIE
1655 (Position Independent Executable) main symbol file will only be
1656 computed by the solib_create_inferior_hook below. Without it,
1657 breakpoint_re_set would fail to insert the breakpoints with the zero
1659 add_flags
|= SYMFILE_DEFER_BP_RESET
;
1661 symbol_file_add_main_1 (name
, add_flags
, flags
, offset
);
1663 solib_create_inferior_hook (from_tty
);
1665 /* Now it's safe to re-add the breakpoints. */
1666 breakpoint_re_set ();
1670 /* Set the initial language.
1672 FIXME: A better solution would be to record the language in the
1673 psymtab when reading partial symbols, and then use it (if known) to
1674 set the language. This would be a win for formats that encode the
1675 language in an easily discoverable place, such as DWARF. For
1676 stabs, we can jump through hoops looking for specially named
1677 symbols or try to intuit the language from the specific type of
1678 stabs we find, but we can't do that until later when we read in
1682 set_initial_language (void)
1684 enum language lang
= main_language ();
1686 if (lang
== language_unknown
)
1688 const char *name
= main_name ();
1689 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1692 lang
= sym
->language ();
1695 if (lang
== language_unknown
)
1697 /* Make C the default language */
1701 set_language (lang
);
1702 expected_language
= current_language
; /* Don't warn the user. */
1705 /* Open the file specified by NAME and hand it off to BFD for
1706 preliminary analysis. Return a newly initialized bfd *, which
1707 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1708 absolute). In case of trouble, error() is called. */
1711 symfile_bfd_open (const char *name
)
1715 gdb::unique_xmalloc_ptr
<char> absolute_name
;
1716 if (!is_target_filename (name
))
1718 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1720 /* Look down path for it, allocate 2nd new malloc'd copy. */
1721 desc
= openp (getenv ("PATH"),
1722 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1723 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1724 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1727 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1729 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1730 desc
= openp (getenv ("PATH"),
1731 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1732 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1736 perror_with_name (expanded_name
.get ());
1738 name
= absolute_name
.get ();
1741 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1742 if (sym_bfd
== NULL
)
1743 error (_("`%s': can't open to read symbols: %s."), name
,
1744 bfd_errmsg (bfd_get_error ()));
1746 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1747 bfd_set_cacheable (sym_bfd
.get (), 1);
1749 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1750 error (_("`%s': can't read symbols: %s."), name
,
1751 bfd_errmsg (bfd_get_error ()));
1756 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1757 the section was not found. */
1760 get_section_index (struct objfile
*objfile
, const char *section_name
)
1762 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1770 /* Link SF into the global symtab_fns list.
1771 FLAVOUR is the file format that SF handles.
1772 Called on startup by the _initialize routine in each object file format
1773 reader, to register information about each format the reader is prepared
1777 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1779 symtab_fns
.emplace_back (flavour
, sf
);
1782 /* Initialize OBJFILE to read symbols from its associated BFD. It
1783 either returns or calls error(). The result is an initialized
1784 struct sym_fns in the objfile structure, that contains cached
1785 information about the symbol file. */
1787 static const struct sym_fns
*
1788 find_sym_fns (bfd
*abfd
)
1790 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1792 if (our_flavour
== bfd_target_srec_flavour
1793 || our_flavour
== bfd_target_ihex_flavour
1794 || our_flavour
== bfd_target_tekhex_flavour
)
1795 return NULL
; /* No symbols. */
1797 for (const registered_sym_fns
&rsf
: symtab_fns
)
1798 if (our_flavour
== rsf
.sym_flavour
)
1801 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1802 bfd_get_target (abfd
));
1806 /* This function runs the load command of our current target. */
1809 load_command (const char *arg
, int from_tty
)
1813 /* The user might be reloading because the binary has changed. Take
1814 this opportunity to check. */
1815 reopen_exec_file ();
1821 const char *parg
, *prev
;
1823 arg
= get_exec_file (1);
1825 /* We may need to quote this string so buildargv can pull it
1828 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1830 temp
.append (prev
, parg
- prev
);
1832 temp
.push_back ('\\');
1834 /* If we have not copied anything yet, then we didn't see a
1835 character to quote, and we can just leave ARG unchanged. */
1839 arg
= temp
.c_str ();
1843 target_load (arg
, from_tty
);
1845 /* After re-loading the executable, we don't really know which
1846 overlays are mapped any more. */
1847 overlay_cache_invalid
= 1;
1850 /* This version of "load" should be usable for any target. Currently
1851 it is just used for remote targets, not inftarg.c or core files,
1852 on the theory that only in that case is it useful.
1854 Avoiding xmodem and the like seems like a win (a) because we don't have
1855 to worry about finding it, and (b) On VMS, fork() is very slow and so
1856 we don't want to run a subprocess. On the other hand, I'm not sure how
1857 performance compares. */
1859 static int validate_download
= 0;
1861 /* Callback service function for generic_load (bfd_map_over_sections). */
1864 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1866 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1868 *sum
+= bfd_section_size (asec
);
1871 /* Opaque data for load_progress. */
1872 struct load_progress_data
1874 /* Cumulative data. */
1875 unsigned long write_count
= 0;
1876 unsigned long data_count
= 0;
1877 bfd_size_type total_size
= 0;
1880 /* Opaque data for load_progress for a single section. */
1881 struct load_progress_section_data
1883 load_progress_section_data (load_progress_data
*cumulative_
,
1884 const char *section_name_
, ULONGEST section_size_
,
1885 CORE_ADDR lma_
, gdb_byte
*buffer_
)
1886 : cumulative (cumulative_
), section_name (section_name_
),
1887 section_size (section_size_
), lma (lma_
), buffer (buffer_
)
1890 struct load_progress_data
*cumulative
;
1892 /* Per-section data. */
1893 const char *section_name
;
1894 ULONGEST section_sent
= 0;
1895 ULONGEST section_size
;
1900 /* Opaque data for load_section_callback. */
1901 struct load_section_data
1903 load_section_data (load_progress_data
*progress_data_
)
1904 : progress_data (progress_data_
)
1907 ~load_section_data ()
1909 for (auto &&request
: requests
)
1911 xfree (request
.data
);
1912 delete ((load_progress_section_data
*) request
.baton
);
1916 CORE_ADDR load_offset
= 0;
1917 struct load_progress_data
*progress_data
;
1918 std::vector
<struct memory_write_request
> requests
;
1921 /* Target write callback routine for progress reporting. */
1924 load_progress (ULONGEST bytes
, void *untyped_arg
)
1926 struct load_progress_section_data
*args
1927 = (struct load_progress_section_data
*) untyped_arg
;
1928 struct load_progress_data
*totals
;
1931 /* Writing padding data. No easy way to get at the cumulative
1932 stats, so just ignore this. */
1935 totals
= args
->cumulative
;
1937 if (bytes
== 0 && args
->section_sent
== 0)
1939 /* The write is just starting. Let the user know we've started
1941 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1943 hex_string (args
->section_size
),
1944 paddress (target_gdbarch (), args
->lma
));
1948 if (validate_download
)
1950 /* Broken memories and broken monitors manifest themselves here
1951 when bring new computers to life. This doubles already slow
1953 /* NOTE: cagney/1999-10-18: A more efficient implementation
1954 might add a verify_memory() method to the target vector and
1955 then use that. remote.c could implement that method using
1956 the ``qCRC'' packet. */
1957 gdb::byte_vector
check (bytes
);
1959 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1960 error (_("Download verify read failed at %s"),
1961 paddress (target_gdbarch (), args
->lma
));
1962 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1963 error (_("Download verify compare failed at %s"),
1964 paddress (target_gdbarch (), args
->lma
));
1966 totals
->data_count
+= bytes
;
1968 args
->buffer
+= bytes
;
1969 totals
->write_count
+= 1;
1970 args
->section_sent
+= bytes
;
1971 if (check_quit_flag ()
1972 || (deprecated_ui_load_progress_hook
!= NULL
1973 && deprecated_ui_load_progress_hook (args
->section_name
,
1974 args
->section_sent
)))
1975 error (_("Canceled the download"));
1977 if (deprecated_show_load_progress
!= NULL
)
1978 deprecated_show_load_progress (args
->section_name
,
1982 totals
->total_size
);
1985 /* Callback service function for generic_load (bfd_map_over_sections). */
1988 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1990 struct load_section_data
*args
= (struct load_section_data
*) data
;
1991 bfd_size_type size
= bfd_section_size (asec
);
1992 const char *sect_name
= bfd_section_name (asec
);
1994 if ((bfd_section_flags (asec
) & SEC_LOAD
) == 0)
2000 ULONGEST begin
= bfd_section_lma (asec
) + args
->load_offset
;
2001 ULONGEST end
= begin
+ size
;
2002 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (size
);
2003 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2005 load_progress_section_data
*section_data
2006 = new load_progress_section_data (args
->progress_data
, sect_name
, size
,
2009 args
->requests
.emplace_back (begin
, end
, buffer
, section_data
);
2012 static void print_transfer_performance (struct ui_file
*stream
,
2013 unsigned long data_count
,
2014 unsigned long write_count
,
2015 std::chrono::steady_clock::duration d
);
2017 /* See symfile.h. */
2020 generic_load (const char *args
, int from_tty
)
2022 struct load_progress_data total_progress
;
2023 struct load_section_data
cbdata (&total_progress
);
2024 struct ui_out
*uiout
= current_uiout
;
2027 error_no_arg (_("file to load"));
2029 gdb_argv
argv (args
);
2031 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2033 if (argv
[1] != NULL
)
2037 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2039 /* If the last word was not a valid number then
2040 treat it as a file name with spaces in. */
2041 if (argv
[1] == endptr
)
2042 error (_("Invalid download offset:%s."), argv
[1]);
2044 if (argv
[2] != NULL
)
2045 error (_("Too many parameters."));
2048 /* Open the file for loading. */
2049 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
2050 if (loadfile_bfd
== NULL
)
2051 perror_with_name (filename
.get ());
2053 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2055 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2056 bfd_errmsg (bfd_get_error ()));
2059 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
2060 (void *) &total_progress
.total_size
);
2062 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
2064 using namespace std::chrono
;
2066 steady_clock::time_point start_time
= steady_clock::now ();
2068 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2069 load_progress
) != 0)
2070 error (_("Load failed"));
2072 steady_clock::time_point end_time
= steady_clock::now ();
2074 CORE_ADDR entry
= bfd_get_start_address (loadfile_bfd
.get ());
2075 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2076 uiout
->text ("Start address ");
2077 uiout
->field_core_addr ("address", target_gdbarch (), entry
);
2078 uiout
->text (", load size ");
2079 uiout
->field_unsigned ("load-size", total_progress
.data_count
);
2081 regcache_write_pc (get_current_regcache (), entry
);
2083 /* Reset breakpoints, now that we have changed the load image. For
2084 instance, breakpoints may have been set (or reset, by
2085 post_create_inferior) while connected to the target but before we
2086 loaded the program. In that case, the prologue analyzer could
2087 have read instructions from the target to find the right
2088 breakpoint locations. Loading has changed the contents of that
2091 breakpoint_re_set ();
2093 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2094 total_progress
.write_count
,
2095 end_time
- start_time
);
2098 /* Report on STREAM the performance of a memory transfer operation,
2099 such as 'load'. DATA_COUNT is the number of bytes transferred.
2100 WRITE_COUNT is the number of separate write operations, or 0, if
2101 that information is not available. TIME is how long the operation
2105 print_transfer_performance (struct ui_file
*stream
,
2106 unsigned long data_count
,
2107 unsigned long write_count
,
2108 std::chrono::steady_clock::duration time
)
2110 using namespace std::chrono
;
2111 struct ui_out
*uiout
= current_uiout
;
2113 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2115 uiout
->text ("Transfer rate: ");
2116 if (ms
.count () > 0)
2118 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2120 if (uiout
->is_mi_like_p ())
2122 uiout
->field_unsigned ("transfer-rate", rate
* 8);
2123 uiout
->text (" bits/sec");
2125 else if (rate
< 1024)
2127 uiout
->field_unsigned ("transfer-rate", rate
);
2128 uiout
->text (" bytes/sec");
2132 uiout
->field_unsigned ("transfer-rate", rate
/ 1024);
2133 uiout
->text (" KB/sec");
2138 uiout
->field_unsigned ("transferred-bits", (data_count
* 8));
2139 uiout
->text (" bits in <1 sec");
2141 if (write_count
> 0)
2144 uiout
->field_unsigned ("write-rate", data_count
/ write_count
);
2145 uiout
->text (" bytes/write");
2147 uiout
->text (".\n");
2150 /* Add an OFFSET to the start address of each section in OBJF, except
2151 sections that were specified in ADDRS. */
2154 set_objfile_default_section_offset (struct objfile
*objf
,
2155 const section_addr_info
&addrs
,
2158 /* Add OFFSET to all sections by default. */
2159 section_offsets
offsets (objf
->section_offsets
.size (), offset
);
2161 /* Create sorted lists of all sections in ADDRS as well as all
2162 sections in OBJF. */
2164 std::vector
<const struct other_sections
*> addrs_sorted
2165 = addrs_section_sort (addrs
);
2167 section_addr_info objf_addrs
2168 = build_section_addr_info_from_objfile (objf
);
2169 std::vector
<const struct other_sections
*> objf_addrs_sorted
2170 = addrs_section_sort (objf_addrs
);
2172 /* Walk the BFD section list, and if a matching section is found in
2173 ADDRS_SORTED_LIST, set its offset to zero to keep its address
2176 Note that both lists may contain multiple sections with the same
2177 name, and then the sections from ADDRS are matched in BFD order
2178 (thanks to sectindex). */
2180 std::vector
<const struct other_sections
*>::iterator addrs_sorted_iter
2181 = addrs_sorted
.begin ();
2182 for (const other_sections
*objf_sect
: objf_addrs_sorted
)
2184 const char *objf_name
= addr_section_name (objf_sect
->name
.c_str ());
2187 while (cmp
< 0 && addrs_sorted_iter
!= addrs_sorted
.end ())
2189 const struct other_sections
*sect
= *addrs_sorted_iter
;
2190 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
2191 cmp
= strcmp (sect_name
, objf_name
);
2193 ++addrs_sorted_iter
;
2197 offsets
[objf_sect
->sectindex
] = 0;
2200 /* Apply the new section offsets. */
2201 objfile_relocate (objf
, offsets
);
2204 /* This function allows the addition of incrementally linked object files.
2205 It does not modify any state in the target, only in the debugger. */
2208 add_symbol_file_command (const char *args
, int from_tty
)
2210 struct gdbarch
*gdbarch
= get_current_arch ();
2211 gdb::unique_xmalloc_ptr
<char> filename
;
2214 struct objfile
*objf
;
2215 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2216 symfile_add_flags add_flags
= 0;
2219 add_flags
|= SYMFILE_VERBOSE
;
2227 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2228 bool stop_processing_options
= false;
2229 CORE_ADDR offset
= 0;
2234 error (_("add-symbol-file takes a file name and an address"));
2236 bool seen_addr
= false;
2237 bool seen_offset
= false;
2238 gdb_argv
argv (args
);
2240 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2242 if (stop_processing_options
|| *arg
!= '-')
2244 if (filename
== NULL
)
2246 /* First non-option argument is always the filename. */
2247 filename
.reset (tilde_expand (arg
));
2249 else if (!seen_addr
)
2251 /* The second non-option argument is always the text
2252 address at which to load the program. */
2253 sect_opts
[0].value
= arg
;
2257 error (_("Unrecognized argument \"%s\""), arg
);
2259 else if (strcmp (arg
, "-readnow") == 0)
2260 flags
|= OBJF_READNOW
;
2261 else if (strcmp (arg
, "-readnever") == 0)
2262 flags
|= OBJF_READNEVER
;
2263 else if (strcmp (arg
, "-s") == 0)
2265 if (argv
[argcnt
+ 1] == NULL
)
2266 error (_("Missing section name after \"-s\""));
2267 else if (argv
[argcnt
+ 2] == NULL
)
2268 error (_("Missing section address after \"-s\""));
2270 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2272 sect_opts
.push_back (sect
);
2275 else if (strcmp (arg
, "-o") == 0)
2277 arg
= argv
[++argcnt
];
2279 error (_("Missing argument to -o"));
2281 offset
= parse_and_eval_address (arg
);
2284 else if (strcmp (arg
, "--") == 0)
2285 stop_processing_options
= true;
2287 error (_("Unrecognized argument \"%s\""), arg
);
2290 if (filename
== NULL
)
2291 error (_("You must provide a filename to be loaded."));
2293 validate_readnow_readnever (flags
);
2295 /* Print the prompt for the query below. And save the arguments into
2296 a sect_addr_info structure to be passed around to other
2297 functions. We have to split this up into separate print
2298 statements because hex_string returns a local static
2301 printf_unfiltered (_("add symbol table from file \"%s\""),
2303 section_addr_info section_addrs
;
2304 std::vector
<sect_opt
>::const_iterator it
= sect_opts
.begin ();
2307 for (; it
!= sect_opts
.end (); ++it
)
2310 const char *val
= it
->value
;
2311 const char *sec
= it
->name
;
2313 if (section_addrs
.empty ())
2314 printf_unfiltered (_(" at\n"));
2315 addr
= parse_and_eval_address (val
);
2317 /* Here we store the section offsets in the order they were
2318 entered on the command line. Every array element is
2319 assigned an ascending section index to preserve the above
2320 order over an unstable sorting algorithm. This dummy
2321 index is not used for any other purpose.
2323 section_addrs
.emplace_back (addr
, sec
, section_addrs
.size ());
2324 printf_filtered ("\t%s_addr = %s\n", sec
,
2325 paddress (gdbarch
, addr
));
2327 /* The object's sections are initialized when a
2328 call is made to build_objfile_section_table (objfile).
2329 This happens in reread_symbols.
2330 At this point, we don't know what file type this is,
2331 so we can't determine what section names are valid. */
2334 printf_unfiltered (_("%s offset by %s\n"),
2335 (section_addrs
.empty ()
2336 ? _(" with all sections")
2337 : _("with other sections")),
2338 paddress (gdbarch
, offset
));
2339 else if (section_addrs
.empty ())
2340 printf_unfiltered ("\n");
2342 if (from_tty
&& (!query ("%s", "")))
2343 error (_("Not confirmed."));
2345 objf
= symbol_file_add (filename
.get (), add_flags
, §ion_addrs
,
2347 if (!objfile_has_symbols (objf
) && objf
->per_bfd
->minimal_symbol_count
<= 0)
2348 warning (_("newly-added symbol file \"%s\" does not provide any symbols"),
2352 set_objfile_default_section_offset (objf
, section_addrs
, offset
);
2354 add_target_sections_of_objfile (objf
);
2356 /* Getting new symbols may change our opinion about what is
2358 reinit_frame_cache ();
2362 /* This function removes a symbol file that was added via add-symbol-file. */
2365 remove_symbol_file_command (const char *args
, int from_tty
)
2367 struct objfile
*objf
= NULL
;
2368 struct program_space
*pspace
= current_program_space
;
2373 error (_("remove-symbol-file: no symbol file provided"));
2375 gdb_argv
argv (args
);
2377 if (strcmp (argv
[0], "-a") == 0)
2379 /* Interpret the next argument as an address. */
2382 if (argv
[1] == NULL
)
2383 error (_("Missing address argument"));
2385 if (argv
[2] != NULL
)
2386 error (_("Junk after %s"), argv
[1]);
2388 addr
= parse_and_eval_address (argv
[1]);
2390 for (objfile
*objfile
: current_program_space
->objfiles ())
2392 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2393 && (objfile
->flags
& OBJF_SHARED
) != 0
2394 && objfile
->pspace
== pspace
2395 && is_addr_in_objfile (addr
, objfile
))
2402 else if (argv
[0] != NULL
)
2404 /* Interpret the current argument as a file name. */
2406 if (argv
[1] != NULL
)
2407 error (_("Junk after %s"), argv
[0]);
2409 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2411 for (objfile
*objfile
: current_program_space
->objfiles ())
2413 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2414 && (objfile
->flags
& OBJF_SHARED
) != 0
2415 && objfile
->pspace
== pspace
2416 && filename_cmp (filename
.get (), objfile_name (objfile
)) == 0)
2425 error (_("No symbol file found"));
2428 && !query (_("Remove symbol table from file \"%s\"? "),
2429 objfile_name (objf
)))
2430 error (_("Not confirmed."));
2433 clear_symtab_users (0);
2436 /* Re-read symbols if a symbol-file has changed. */
2439 reread_symbols (void)
2442 struct stat new_statbuf
;
2444 std::vector
<struct objfile
*> new_objfiles
;
2446 for (objfile
*objfile
: current_program_space
->objfiles ())
2448 if (objfile
->obfd
== NULL
)
2451 /* Separate debug objfiles are handled in the main objfile. */
2452 if (objfile
->separate_debug_objfile_backlink
)
2455 /* If this object is from an archive (what you usually create with
2456 `ar', often called a `static library' on most systems, though
2457 a `shared library' on AIX is also an archive), then you should
2458 stat on the archive name, not member name. */
2459 if (objfile
->obfd
->my_archive
)
2460 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2462 res
= stat (objfile_name (objfile
), &new_statbuf
);
2465 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2466 printf_filtered (_("`%s' has disappeared; keeping its symbols.\n"),
2467 objfile_name (objfile
));
2470 new_modtime
= new_statbuf
.st_mtime
;
2471 if (new_modtime
!= objfile
->mtime
)
2473 printf_filtered (_("`%s' has changed; re-reading symbols.\n"),
2474 objfile_name (objfile
));
2476 /* There are various functions like symbol_file_add,
2477 symfile_bfd_open, syms_from_objfile, etc., which might
2478 appear to do what we want. But they have various other
2479 effects which we *don't* want. So we just do stuff
2480 ourselves. We don't worry about mapped files (for one thing,
2481 any mapped file will be out of date). */
2483 /* If we get an error, blow away this objfile (not sure if
2484 that is the correct response for things like shared
2486 objfile_up
objfile_holder (objfile
);
2488 /* We need to do this whenever any symbols go away. */
2489 clear_symtab_users_cleanup
defer_clear_users (0);
2491 if (exec_bfd
!= NULL
2492 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2493 bfd_get_filename (exec_bfd
)) == 0)
2495 /* Reload EXEC_BFD without asking anything. */
2497 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2500 /* Keep the calls order approx. the same as in free_objfile. */
2502 /* Free the separate debug objfiles. It will be
2503 automatically recreated by sym_read. */
2504 free_objfile_separate_debug (objfile
);
2506 /* Clear the stale source cache. */
2507 forget_cached_source_info ();
2509 /* Remove any references to this objfile in the global
2511 preserve_values (objfile
);
2513 /* Nuke all the state that we will re-read. Much of the following
2514 code which sets things to NULL really is necessary to tell
2515 other parts of GDB that there is nothing currently there.
2517 Try to keep the freeing order compatible with free_objfile. */
2519 if (objfile
->sf
!= NULL
)
2521 (*objfile
->sf
->sym_finish
) (objfile
);
2524 clear_objfile_data (objfile
);
2526 /* Clean up any state BFD has sitting around. */
2528 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2529 const char *obfd_filename
;
2531 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2532 /* Open the new BFD before freeing the old one, so that
2533 the filename remains live. */
2534 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2535 objfile
->obfd
= temp
.release ();
2536 if (objfile
->obfd
== NULL
)
2537 error (_("Can't open %s to read symbols."), obfd_filename
);
2540 std::string original_name
= objfile
->original_name
;
2542 /* bfd_openr sets cacheable to true, which is what we want. */
2543 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2544 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2545 bfd_errmsg (bfd_get_error ()));
2547 objfile
->reset_psymtabs ();
2549 /* NB: after this call to obstack_free, objfiles_changed
2550 will need to be called (see discussion below). */
2551 obstack_free (&objfile
->objfile_obstack
, 0);
2552 objfile
->sections
= NULL
;
2553 objfile
->compunit_symtabs
= NULL
;
2554 objfile
->template_symbols
= NULL
;
2555 objfile
->static_links
.reset (nullptr);
2557 /* obstack_init also initializes the obstack so it is
2558 empty. We could use obstack_specify_allocation but
2559 gdb_obstack.h specifies the alloc/dealloc functions. */
2560 obstack_init (&objfile
->objfile_obstack
);
2562 /* set_objfile_per_bfd potentially allocates the per-bfd
2563 data on the objfile's obstack (if sharing data across
2564 multiple users is not possible), so it's important to
2565 do it *after* the obstack has been initialized. */
2566 set_objfile_per_bfd (objfile
);
2568 objfile
->original_name
2569 = obstack_strdup (&objfile
->objfile_obstack
, original_name
);
2571 /* Reset the sym_fns pointer. The ELF reader can change it
2572 based on whether .gdb_index is present, and we need it to
2573 start over. PR symtab/15885 */
2574 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2576 build_objfile_section_table (objfile
);
2578 /* What the hell is sym_new_init for, anyway? The concept of
2579 distinguishing between the main file and additional files
2580 in this way seems rather dubious. */
2581 if (objfile
== symfile_objfile
)
2583 (*objfile
->sf
->sym_new_init
) (objfile
);
2586 (*objfile
->sf
->sym_init
) (objfile
);
2587 clear_complaints ();
2589 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2591 /* We are about to read new symbols and potentially also
2592 DWARF information. Some targets may want to pass addresses
2593 read from DWARF DIE's through an adjustment function before
2594 saving them, like MIPS, which may call into
2595 "find_pc_section". When called, that function will make
2596 use of per-objfile program space data.
2598 Since we discarded our section information above, we have
2599 dangling pointers in the per-objfile program space data
2600 structure. Force GDB to update the section mapping
2601 information by letting it know the objfile has changed,
2602 making the dangling pointers point to correct data
2605 objfiles_changed ();
2607 read_symbols (objfile
, 0);
2609 if (!objfile_has_symbols (objfile
))
2612 printf_filtered (_("(no debugging symbols found)\n"));
2616 /* We're done reading the symbol file; finish off complaints. */
2617 clear_complaints ();
2619 /* Getting new symbols may change our opinion about what is
2622 reinit_frame_cache ();
2624 /* Discard cleanups as symbol reading was successful. */
2625 objfile_holder
.release ();
2626 defer_clear_users
.release ();
2628 /* If the mtime has changed between the time we set new_modtime
2629 and now, we *want* this to be out of date, so don't call stat
2631 objfile
->mtime
= new_modtime
;
2632 init_entry_point_info (objfile
);
2634 new_objfiles
.push_back (objfile
);
2638 if (!new_objfiles
.empty ())
2640 clear_symtab_users (0);
2642 /* clear_objfile_data for each objfile was called before freeing it and
2643 gdb::observers::new_objfile.notify (NULL) has been called by
2644 clear_symtab_users above. Notify the new files now. */
2645 for (auto iter
: new_objfiles
)
2646 gdb::observers::new_objfile
.notify (iter
);
2648 /* At least one objfile has changed, so we can consider that
2649 the executable we're debugging has changed too. */
2650 gdb::observers::executable_changed
.notify ();
2655 struct filename_language
2657 filename_language (const std::string
&ext_
, enum language lang_
)
2658 : ext (ext_
), lang (lang_
)
2665 static std::vector
<filename_language
> filename_language_table
;
2667 /* See symfile.h. */
2670 add_filename_language (const char *ext
, enum language lang
)
2672 filename_language_table
.emplace_back (ext
, lang
);
2675 static char *ext_args
;
2677 show_ext_args (struct ui_file
*file
, int from_tty
,
2678 struct cmd_list_element
*c
, const char *value
)
2680 fprintf_filtered (file
,
2681 _("Mapping between filename extension "
2682 "and source language is \"%s\".\n"),
2687 set_ext_lang_command (const char *args
,
2688 int from_tty
, struct cmd_list_element
*e
)
2690 char *cp
= ext_args
;
2693 /* First arg is filename extension, starting with '.' */
2695 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2697 /* Find end of first arg. */
2698 while (*cp
&& !isspace (*cp
))
2702 error (_("'%s': two arguments required -- "
2703 "filename extension and language"),
2706 /* Null-terminate first arg. */
2709 /* Find beginning of second arg, which should be a source language. */
2710 cp
= skip_spaces (cp
);
2713 error (_("'%s': two arguments required -- "
2714 "filename extension and language"),
2717 /* Lookup the language from among those we know. */
2718 lang
= language_enum (cp
);
2720 auto it
= filename_language_table
.begin ();
2721 /* Now lookup the filename extension: do we already know it? */
2722 for (; it
!= filename_language_table
.end (); it
++)
2724 if (it
->ext
== ext_args
)
2728 if (it
== filename_language_table
.end ())
2730 /* New file extension. */
2731 add_filename_language (ext_args
, lang
);
2735 /* Redefining a previously known filename extension. */
2738 /* query ("Really make files of type %s '%s'?", */
2739 /* ext_args, language_str (lang)); */
2746 info_ext_lang_command (const char *args
, int from_tty
)
2748 printf_filtered (_("Filename extensions and the languages they represent:"));
2749 printf_filtered ("\n\n");
2750 for (const filename_language
&entry
: filename_language_table
)
2751 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2752 language_str (entry
.lang
));
2756 deduce_language_from_filename (const char *filename
)
2760 if (filename
!= NULL
)
2761 if ((cp
= strrchr (filename
, '.')) != NULL
)
2763 for (const filename_language
&entry
: filename_language_table
)
2764 if (entry
.ext
== cp
)
2768 return language_unknown
;
2771 /* Allocate and initialize a new symbol table.
2772 CUST is from the result of allocate_compunit_symtab. */
2775 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2777 struct objfile
*objfile
= cust
->objfile
;
2778 struct symtab
*symtab
2779 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2782 = ((const char *) objfile
->per_bfd
->filename_cache
.insert
2783 (filename
, strlen (filename
) + 1));
2784 symtab
->fullname
= NULL
;
2785 symtab
->language
= deduce_language_from_filename (filename
);
2787 /* This can be very verbose with lots of headers.
2788 Only print at higher debug levels. */
2789 if (symtab_create_debug
>= 2)
2791 /* Be a bit clever with debugging messages, and don't print objfile
2792 every time, only when it changes. */
2793 static char *last_objfile_name
= NULL
;
2795 if (last_objfile_name
== NULL
2796 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2798 xfree (last_objfile_name
);
2799 last_objfile_name
= xstrdup (objfile_name (objfile
));
2800 fprintf_filtered (gdb_stdlog
,
2801 "Creating one or more symtabs for objfile %s ...\n",
2804 fprintf_filtered (gdb_stdlog
,
2805 "Created symtab %s for module %s.\n",
2806 host_address_to_string (symtab
), filename
);
2809 /* Add it to CUST's list of symtabs. */
2810 if (cust
->filetabs
== NULL
)
2812 cust
->filetabs
= symtab
;
2813 cust
->last_filetab
= symtab
;
2817 cust
->last_filetab
->next
= symtab
;
2818 cust
->last_filetab
= symtab
;
2821 /* Backlink to the containing compunit symtab. */
2822 symtab
->compunit_symtab
= cust
;
2827 /* Allocate and initialize a new compunit.
2828 NAME is the name of the main source file, if there is one, or some
2829 descriptive text if there are no source files. */
2831 struct compunit_symtab
*
2832 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2834 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2835 struct compunit_symtab
);
2836 const char *saved_name
;
2838 cu
->objfile
= objfile
;
2840 /* The name we record here is only for display/debugging purposes.
2841 Just save the basename to avoid path issues (too long for display,
2842 relative vs absolute, etc.). */
2843 saved_name
= lbasename (name
);
2844 cu
->name
= obstack_strdup (&objfile
->objfile_obstack
, saved_name
);
2846 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2848 if (symtab_create_debug
)
2850 fprintf_filtered (gdb_stdlog
,
2851 "Created compunit symtab %s for %s.\n",
2852 host_address_to_string (cu
),
2859 /* Hook CU to the objfile it comes from. */
2862 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2864 cu
->next
= cu
->objfile
->compunit_symtabs
;
2865 cu
->objfile
->compunit_symtabs
= cu
;
2869 /* Reset all data structures in gdb which may contain references to
2870 symbol table data. */
2873 clear_symtab_users (symfile_add_flags add_flags
)
2875 /* Someday, we should do better than this, by only blowing away
2876 the things that really need to be blown. */
2878 /* Clear the "current" symtab first, because it is no longer valid.
2879 breakpoint_re_set may try to access the current symtab. */
2880 clear_current_source_symtab_and_line ();
2883 clear_last_displayed_sal ();
2884 clear_pc_function_cache ();
2885 gdb::observers::new_objfile
.notify (NULL
);
2887 /* Varobj may refer to old symbols, perform a cleanup. */
2888 varobj_invalidate ();
2890 /* Now that the various caches have been cleared, we can re_set
2891 our breakpoints without risking it using stale data. */
2892 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2893 breakpoint_re_set ();
2897 The following code implements an abstraction for debugging overlay sections.
2899 The target model is as follows:
2900 1) The gnu linker will permit multiple sections to be mapped into the
2901 same VMA, each with its own unique LMA (or load address).
2902 2) It is assumed that some runtime mechanism exists for mapping the
2903 sections, one by one, from the load address into the VMA address.
2904 3) This code provides a mechanism for gdb to keep track of which
2905 sections should be considered to be mapped from the VMA to the LMA.
2906 This information is used for symbol lookup, and memory read/write.
2907 For instance, if a section has been mapped then its contents
2908 should be read from the VMA, otherwise from the LMA.
2910 Two levels of debugger support for overlays are available. One is
2911 "manual", in which the debugger relies on the user to tell it which
2912 overlays are currently mapped. This level of support is
2913 implemented entirely in the core debugger, and the information about
2914 whether a section is mapped is kept in the objfile->obj_section table.
2916 The second level of support is "automatic", and is only available if
2917 the target-specific code provides functionality to read the target's
2918 overlay mapping table, and translate its contents for the debugger
2919 (by updating the mapped state information in the obj_section tables).
2921 The interface is as follows:
2923 overlay map <name> -- tell gdb to consider this section mapped
2924 overlay unmap <name> -- tell gdb to consider this section unmapped
2925 overlay list -- list the sections that GDB thinks are mapped
2926 overlay read-target -- get the target's state of what's mapped
2927 overlay off/manual/auto -- set overlay debugging state
2928 Functional interface:
2929 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2930 section, return that section.
2931 find_pc_overlay(pc): find any overlay section that contains
2932 the pc, either in its VMA or its LMA
2933 section_is_mapped(sect): true if overlay is marked as mapped
2934 section_is_overlay(sect): true if section's VMA != LMA
2935 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2936 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2937 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2938 overlay_mapped_address(...): map an address from section's LMA to VMA
2939 overlay_unmapped_address(...): map an address from section's VMA to LMA
2940 symbol_overlayed_address(...): Return a "current" address for symbol:
2941 either in VMA or LMA depending on whether
2942 the symbol's section is currently mapped. */
2944 /* Overlay debugging state: */
2946 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2947 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2949 /* Function: section_is_overlay (SECTION)
2950 Returns true if SECTION has VMA not equal to LMA, ie.
2951 SECTION is loaded at an address different from where it will "run". */
2954 section_is_overlay (struct obj_section
*section
)
2956 if (overlay_debugging
&& section
)
2958 asection
*bfd_section
= section
->the_bfd_section
;
2960 if (bfd_section_lma (bfd_section
) != 0
2961 && bfd_section_lma (bfd_section
) != bfd_section_vma (bfd_section
))
2968 /* Function: overlay_invalidate_all (void)
2969 Invalidate the mapped state of all overlay sections (mark it as stale). */
2972 overlay_invalidate_all (void)
2974 struct obj_section
*sect
;
2976 for (objfile
*objfile
: current_program_space
->objfiles ())
2977 ALL_OBJFILE_OSECTIONS (objfile
, sect
)
2978 if (section_is_overlay (sect
))
2979 sect
->ovly_mapped
= -1;
2982 /* Function: section_is_mapped (SECTION)
2983 Returns true if section is an overlay, and is currently mapped.
2985 Access to the ovly_mapped flag is restricted to this function, so
2986 that we can do automatic update. If the global flag
2987 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2988 overlay_invalidate_all. If the mapped state of the particular
2989 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2992 section_is_mapped (struct obj_section
*osect
)
2994 struct gdbarch
*gdbarch
;
2996 if (osect
== 0 || !section_is_overlay (osect
))
2999 switch (overlay_debugging
)
3003 return 0; /* overlay debugging off */
3004 case ovly_auto
: /* overlay debugging automatic */
3005 /* Unles there is a gdbarch_overlay_update function,
3006 there's really nothing useful to do here (can't really go auto). */
3007 gdbarch
= get_objfile_arch (osect
->objfile
);
3008 if (gdbarch_overlay_update_p (gdbarch
))
3010 if (overlay_cache_invalid
)
3012 overlay_invalidate_all ();
3013 overlay_cache_invalid
= 0;
3015 if (osect
->ovly_mapped
== -1)
3016 gdbarch_overlay_update (gdbarch
, osect
);
3019 case ovly_on
: /* overlay debugging manual */
3020 return osect
->ovly_mapped
== 1;
3024 /* Function: pc_in_unmapped_range
3025 If PC falls into the lma range of SECTION, return true, else false. */
3028 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3030 if (section_is_overlay (section
))
3032 asection
*bfd_section
= section
->the_bfd_section
;
3034 /* We assume the LMA is relocated by the same offset as the VMA. */
3035 bfd_vma size
= bfd_section_size (bfd_section
);
3036 CORE_ADDR offset
= obj_section_offset (section
);
3038 if (bfd_section_lma (bfd_section
) + offset
<= pc
3039 && pc
< bfd_section_lma (bfd_section
) + offset
+ size
)
3046 /* Function: pc_in_mapped_range
3047 If PC falls into the vma range of SECTION, return true, else false. */
3050 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3052 if (section_is_overlay (section
))
3054 if (obj_section_addr (section
) <= pc
3055 && pc
< obj_section_endaddr (section
))
3062 /* Return true if the mapped ranges of sections A and B overlap, false
3066 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3068 CORE_ADDR a_start
= obj_section_addr (a
);
3069 CORE_ADDR a_end
= obj_section_endaddr (a
);
3070 CORE_ADDR b_start
= obj_section_addr (b
);
3071 CORE_ADDR b_end
= obj_section_endaddr (b
);
3073 return (a_start
< b_end
&& b_start
< a_end
);
3076 /* Function: overlay_unmapped_address (PC, SECTION)
3077 Returns the address corresponding to PC in the unmapped (load) range.
3078 May be the same as PC. */
3081 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3083 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3085 asection
*bfd_section
= section
->the_bfd_section
;
3087 return (pc
+ bfd_section_lma (bfd_section
)
3088 - bfd_section_vma (bfd_section
));
3094 /* Function: overlay_mapped_address (PC, SECTION)
3095 Returns the address corresponding to PC in the mapped (runtime) range.
3096 May be the same as PC. */
3099 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3101 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3103 asection
*bfd_section
= section
->the_bfd_section
;
3105 return (pc
+ bfd_section_vma (bfd_section
)
3106 - bfd_section_lma (bfd_section
));
3112 /* Function: symbol_overlayed_address
3113 Return one of two addresses (relative to the VMA or to the LMA),
3114 depending on whether the section is mapped or not. */
3117 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3119 if (overlay_debugging
)
3121 /* If the symbol has no section, just return its regular address. */
3124 /* If the symbol's section is not an overlay, just return its
3126 if (!section_is_overlay (section
))
3128 /* If the symbol's section is mapped, just return its address. */
3129 if (section_is_mapped (section
))
3132 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3133 * then return its LOADED address rather than its vma address!!
3135 return overlay_unmapped_address (address
, section
);
3140 /* Function: find_pc_overlay (PC)
3141 Return the best-match overlay section for PC:
3142 If PC matches a mapped overlay section's VMA, return that section.
3143 Else if PC matches an unmapped section's VMA, return that section.
3144 Else if PC matches an unmapped section's LMA, return that section. */
3146 struct obj_section
*
3147 find_pc_overlay (CORE_ADDR pc
)
3149 struct obj_section
*osect
, *best_match
= NULL
;
3151 if (overlay_debugging
)
3153 for (objfile
*objfile
: current_program_space
->objfiles ())
3154 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3155 if (section_is_overlay (osect
))
3157 if (pc_in_mapped_range (pc
, osect
))
3159 if (section_is_mapped (osect
))
3164 else if (pc_in_unmapped_range (pc
, osect
))
3171 /* Function: find_pc_mapped_section (PC)
3172 If PC falls into the VMA address range of an overlay section that is
3173 currently marked as MAPPED, return that section. Else return NULL. */
3175 struct obj_section
*
3176 find_pc_mapped_section (CORE_ADDR pc
)
3178 struct obj_section
*osect
;
3180 if (overlay_debugging
)
3182 for (objfile
*objfile
: current_program_space
->objfiles ())
3183 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3184 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3191 /* Function: list_overlays_command
3192 Print a list of mapped sections and their PC ranges. */
3195 list_overlays_command (const char *args
, int from_tty
)
3198 struct obj_section
*osect
;
3200 if (overlay_debugging
)
3202 for (objfile
*objfile
: current_program_space
->objfiles ())
3203 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3204 if (section_is_mapped (osect
))
3206 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3211 vma
= bfd_section_vma (osect
->the_bfd_section
);
3212 lma
= bfd_section_lma (osect
->the_bfd_section
);
3213 size
= bfd_section_size (osect
->the_bfd_section
);
3214 name
= bfd_section_name (osect
->the_bfd_section
);
3216 printf_filtered ("Section %s, loaded at ", name
);
3217 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3218 puts_filtered (" - ");
3219 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3220 printf_filtered (", mapped at ");
3221 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3222 puts_filtered (" - ");
3223 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3224 puts_filtered ("\n");
3230 printf_filtered (_("No sections are mapped.\n"));
3233 /* Function: map_overlay_command
3234 Mark the named section as mapped (ie. residing at its VMA address). */
3237 map_overlay_command (const char *args
, int from_tty
)
3239 struct obj_section
*sec
, *sec2
;
3241 if (!overlay_debugging
)
3242 error (_("Overlay debugging not enabled. Use "
3243 "either the 'overlay auto' or\n"
3244 "the 'overlay manual' command."));
3246 if (args
== 0 || *args
== 0)
3247 error (_("Argument required: name of an overlay section"));
3249 /* First, find a section matching the user supplied argument. */
3250 for (objfile
*obj_file
: current_program_space
->objfiles ())
3251 ALL_OBJFILE_OSECTIONS (obj_file
, sec
)
3252 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3254 /* Now, check to see if the section is an overlay. */
3255 if (!section_is_overlay (sec
))
3256 continue; /* not an overlay section */
3258 /* Mark the overlay as "mapped". */
3259 sec
->ovly_mapped
= 1;
3261 /* Next, make a pass and unmap any sections that are
3262 overlapped by this new section: */
3263 for (objfile
*objfile2
: current_program_space
->objfiles ())
3264 ALL_OBJFILE_OSECTIONS (objfile2
, sec2
)
3265 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
,
3269 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3270 bfd_section_name (sec2
->the_bfd_section
));
3271 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3275 error (_("No overlay section called %s"), args
);
3278 /* Function: unmap_overlay_command
3279 Mark the overlay section as unmapped
3280 (ie. resident in its LMA address range, rather than the VMA range). */
3283 unmap_overlay_command (const char *args
, int from_tty
)
3285 struct obj_section
*sec
= NULL
;
3287 if (!overlay_debugging
)
3288 error (_("Overlay debugging not enabled. "
3289 "Use either the 'overlay auto' or\n"
3290 "the 'overlay manual' command."));
3292 if (args
== 0 || *args
== 0)
3293 error (_("Argument required: name of an overlay section"));
3295 /* First, find a section matching the user supplied argument. */
3296 for (objfile
*objfile
: current_program_space
->objfiles ())
3297 ALL_OBJFILE_OSECTIONS (objfile
, sec
)
3298 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3300 if (!sec
->ovly_mapped
)
3301 error (_("Section %s is not mapped"), args
);
3302 sec
->ovly_mapped
= 0;
3305 error (_("No overlay section called %s"), args
);
3308 /* Function: overlay_auto_command
3309 A utility command to turn on overlay debugging.
3310 Possibly this should be done via a set/show command. */
3313 overlay_auto_command (const char *args
, int from_tty
)
3315 overlay_debugging
= ovly_auto
;
3316 enable_overlay_breakpoints ();
3318 printf_unfiltered (_("Automatic overlay debugging enabled."));
3321 /* Function: overlay_manual_command
3322 A utility command to turn on overlay debugging.
3323 Possibly this should be done via a set/show command. */
3326 overlay_manual_command (const char *args
, int from_tty
)
3328 overlay_debugging
= ovly_on
;
3329 disable_overlay_breakpoints ();
3331 printf_unfiltered (_("Overlay debugging enabled."));
3334 /* Function: overlay_off_command
3335 A utility command to turn on overlay debugging.
3336 Possibly this should be done via a set/show command. */
3339 overlay_off_command (const char *args
, int from_tty
)
3341 overlay_debugging
= ovly_off
;
3342 disable_overlay_breakpoints ();
3344 printf_unfiltered (_("Overlay debugging disabled."));
3348 overlay_load_command (const char *args
, int from_tty
)
3350 struct gdbarch
*gdbarch
= get_current_arch ();
3352 if (gdbarch_overlay_update_p (gdbarch
))
3353 gdbarch_overlay_update (gdbarch
, NULL
);
3355 error (_("This target does not know how to read its overlay state."));
3358 /* Function: overlay_command
3359 A place-holder for a mis-typed command. */
3361 /* Command list chain containing all defined "overlay" subcommands. */
3362 static struct cmd_list_element
*overlaylist
;
3365 overlay_command (const char *args
, int from_tty
)
3368 ("\"overlay\" must be followed by the name of an overlay command.\n");
3369 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3372 /* Target Overlays for the "Simplest" overlay manager:
3374 This is GDB's default target overlay layer. It works with the
3375 minimal overlay manager supplied as an example by Cygnus. The
3376 entry point is via a function pointer "gdbarch_overlay_update",
3377 so targets that use a different runtime overlay manager can
3378 substitute their own overlay_update function and take over the
3381 The overlay_update function pokes around in the target's data structures
3382 to see what overlays are mapped, and updates GDB's overlay mapping with
3385 In this simple implementation, the target data structures are as follows:
3386 unsigned _novlys; /# number of overlay sections #/
3387 unsigned _ovly_table[_novlys][4] = {
3388 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3389 {..., ..., ..., ...},
3391 unsigned _novly_regions; /# number of overlay regions #/
3392 unsigned _ovly_region_table[_novly_regions][3] = {
3393 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3396 These functions will attempt to update GDB's mappedness state in the
3397 symbol section table, based on the target's mappedness state.
3399 To do this, we keep a cached copy of the target's _ovly_table, and
3400 attempt to detect when the cached copy is invalidated. The main
3401 entry point is "simple_overlay_update(SECT), which looks up SECT in
3402 the cached table and re-reads only the entry for that section from
3403 the target (whenever possible). */
3405 /* Cached, dynamically allocated copies of the target data structures: */
3406 static unsigned (*cache_ovly_table
)[4] = 0;
3407 static unsigned cache_novlys
= 0;
3408 static CORE_ADDR cache_ovly_table_base
= 0;
3411 VMA
, OSIZE
, LMA
, MAPPED
3414 /* Throw away the cached copy of _ovly_table. */
3417 simple_free_overlay_table (void)
3419 if (cache_ovly_table
)
3420 xfree (cache_ovly_table
);
3422 cache_ovly_table
= NULL
;
3423 cache_ovly_table_base
= 0;
3426 /* Read an array of ints of size SIZE from the target into a local buffer.
3427 Convert to host order. int LEN is number of ints. */
3430 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3431 int len
, int size
, enum bfd_endian byte_order
)
3433 /* FIXME (alloca): Not safe if array is very large. */
3434 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3437 read_memory (memaddr
, buf
, len
* size
);
3438 for (i
= 0; i
< len
; i
++)
3439 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3442 /* Find and grab a copy of the target _ovly_table
3443 (and _novlys, which is needed for the table's size). */
3446 simple_read_overlay_table (void)
3448 struct bound_minimal_symbol novlys_msym
;
3449 struct bound_minimal_symbol ovly_table_msym
;
3450 struct gdbarch
*gdbarch
;
3452 enum bfd_endian byte_order
;
3454 simple_free_overlay_table ();
3455 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3456 if (! novlys_msym
.minsym
)
3458 error (_("Error reading inferior's overlay table: "
3459 "couldn't find `_novlys' variable\n"
3460 "in inferior. Use `overlay manual' mode."));
3464 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3465 if (! ovly_table_msym
.minsym
)
3467 error (_("Error reading inferior's overlay table: couldn't find "
3468 "`_ovly_table' array\n"
3469 "in inferior. Use `overlay manual' mode."));
3473 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3474 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3475 byte_order
= gdbarch_byte_order (gdbarch
);
3477 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3480 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3481 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3482 read_target_long_array (cache_ovly_table_base
,
3483 (unsigned int *) cache_ovly_table
,
3484 cache_novlys
* 4, word_size
, byte_order
);
3486 return 1; /* SUCCESS */
3489 /* Function: simple_overlay_update_1
3490 A helper function for simple_overlay_update. Assuming a cached copy
3491 of _ovly_table exists, look through it to find an entry whose vma,
3492 lma and size match those of OSECT. Re-read the entry and make sure
3493 it still matches OSECT (else the table may no longer be valid).
3494 Set OSECT's mapped state to match the entry. Return: 1 for
3495 success, 0 for failure. */
3498 simple_overlay_update_1 (struct obj_section
*osect
)
3501 asection
*bsect
= osect
->the_bfd_section
;
3502 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3503 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3504 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3506 for (i
= 0; i
< cache_novlys
; i
++)
3507 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3508 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3510 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3511 (unsigned int *) cache_ovly_table
[i
],
3512 4, word_size
, byte_order
);
3513 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3514 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3516 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3519 else /* Warning! Warning! Target's ovly table has changed! */
3525 /* Function: simple_overlay_update
3526 If OSECT is NULL, then update all sections' mapped state
3527 (after re-reading the entire target _ovly_table).
3528 If OSECT is non-NULL, then try to find a matching entry in the
3529 cached ovly_table and update only OSECT's mapped state.
3530 If a cached entry can't be found or the cache isn't valid, then
3531 re-read the entire cache, and go ahead and update all sections. */
3534 simple_overlay_update (struct obj_section
*osect
)
3536 /* Were we given an osect to look up? NULL means do all of them. */
3538 /* Have we got a cached copy of the target's overlay table? */
3539 if (cache_ovly_table
!= NULL
)
3541 /* Does its cached location match what's currently in the
3543 struct bound_minimal_symbol minsym
3544 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3546 if (minsym
.minsym
== NULL
)
3547 error (_("Error reading inferior's overlay table: couldn't "
3548 "find `_ovly_table' array\n"
3549 "in inferior. Use `overlay manual' mode."));
3551 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3552 /* Then go ahead and try to look up this single section in
3554 if (simple_overlay_update_1 (osect
))
3555 /* Found it! We're done. */
3559 /* Cached table no good: need to read the entire table anew.
3560 Or else we want all the sections, in which case it's actually
3561 more efficient to read the whole table in one block anyway. */
3563 if (! simple_read_overlay_table ())
3566 /* Now may as well update all sections, even if only one was requested. */
3567 for (objfile
*objfile
: current_program_space
->objfiles ())
3568 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3569 if (section_is_overlay (osect
))
3572 asection
*bsect
= osect
->the_bfd_section
;
3574 for (i
= 0; i
< cache_novlys
; i
++)
3575 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3576 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3577 { /* obj_section matches i'th entry in ovly_table. */
3578 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3579 break; /* finished with inner for loop: break out. */
3584 /* Set the output sections and output offsets for section SECTP in
3585 ABFD. The relocation code in BFD will read these offsets, so we
3586 need to be sure they're initialized. We map each section to itself,
3587 with no offset; this means that SECTP->vma will be honored. */
3590 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3592 sectp
->output_section
= sectp
;
3593 sectp
->output_offset
= 0;
3596 /* Default implementation for sym_relocate. */
3599 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3602 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3604 bfd
*abfd
= sectp
->owner
;
3606 /* We're only interested in sections with relocation
3608 if ((sectp
->flags
& SEC_RELOC
) == 0)
3611 /* We will handle section offsets properly elsewhere, so relocate as if
3612 all sections begin at 0. */
3613 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3615 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3618 /* Relocate the contents of a debug section SECTP in ABFD. The
3619 contents are stored in BUF if it is non-NULL, or returned in a
3620 malloc'd buffer otherwise.
3622 For some platforms and debug info formats, shared libraries contain
3623 relocations against the debug sections (particularly for DWARF-2;
3624 one affected platform is PowerPC GNU/Linux, although it depends on
3625 the version of the linker in use). Also, ELF object files naturally
3626 have unresolved relocations for their debug sections. We need to apply
3627 the relocations in order to get the locations of symbols correct.
3628 Another example that may require relocation processing, is the
3629 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3633 symfile_relocate_debug_section (struct objfile
*objfile
,
3634 asection
*sectp
, bfd_byte
*buf
)
3636 gdb_assert (objfile
->sf
->sym_relocate
);
3638 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3641 struct symfile_segment_data
*
3642 get_symfile_segment_data (bfd
*abfd
)
3644 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3649 return sf
->sym_segments (abfd
);
3653 free_symfile_segment_data (struct symfile_segment_data
*data
)
3655 xfree (data
->segment_bases
);
3656 xfree (data
->segment_sizes
);
3657 xfree (data
->segment_info
);
3662 - DATA, containing segment addresses from the object file ABFD, and
3663 the mapping from ABFD's sections onto the segments that own them,
3665 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3666 segment addresses reported by the target,
3667 store the appropriate offsets for each section in OFFSETS.
3669 If there are fewer entries in SEGMENT_BASES than there are segments
3670 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3672 If there are more entries, then ignore the extra. The target may
3673 not be able to distinguish between an empty data segment and a
3674 missing data segment; a missing text segment is less plausible. */
3677 symfile_map_offsets_to_segments (bfd
*abfd
,
3678 const struct symfile_segment_data
*data
,
3679 section_offsets
&offsets
,
3680 int num_segment_bases
,
3681 const CORE_ADDR
*segment_bases
)
3686 /* It doesn't make sense to call this function unless you have some
3687 segment base addresses. */
3688 gdb_assert (num_segment_bases
> 0);
3690 /* If we do not have segment mappings for the object file, we
3691 can not relocate it by segments. */
3692 gdb_assert (data
!= NULL
);
3693 gdb_assert (data
->num_segments
> 0);
3695 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3697 int which
= data
->segment_info
[i
];
3699 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3701 /* Don't bother computing offsets for sections that aren't
3702 loaded as part of any segment. */
3706 /* Use the last SEGMENT_BASES entry as the address of any extra
3707 segments mentioned in DATA->segment_info. */
3708 if (which
> num_segment_bases
)
3709 which
= num_segment_bases
;
3711 offsets
[i
] = segment_bases
[which
- 1] - data
->segment_bases
[which
- 1];
3718 symfile_find_segment_sections (struct objfile
*objfile
)
3720 bfd
*abfd
= objfile
->obfd
;
3723 struct symfile_segment_data
*data
;
3725 data
= get_symfile_segment_data (objfile
->obfd
);
3729 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3731 free_symfile_segment_data (data
);
3735 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3737 int which
= data
->segment_info
[i
];
3741 if (objfile
->sect_index_text
== -1)
3742 objfile
->sect_index_text
= sect
->index
;
3744 if (objfile
->sect_index_rodata
== -1)
3745 objfile
->sect_index_rodata
= sect
->index
;
3747 else if (which
== 2)
3749 if (objfile
->sect_index_data
== -1)
3750 objfile
->sect_index_data
= sect
->index
;
3752 if (objfile
->sect_index_bss
== -1)
3753 objfile
->sect_index_bss
= sect
->index
;
3757 free_symfile_segment_data (data
);
3760 /* Listen for free_objfile events. */
3763 symfile_free_objfile (struct objfile
*objfile
)
3765 /* Remove the target sections owned by this objfile. */
3766 if (objfile
!= NULL
)
3767 remove_target_sections ((void *) objfile
);
3770 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3771 Expand all symtabs that match the specified criteria.
3772 See quick_symbol_functions.expand_symtabs_matching for details. */
3775 expand_symtabs_matching
3776 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3777 const lookup_name_info
&lookup_name
,
3778 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3779 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3780 enum search_domain kind
)
3782 for (objfile
*objfile
: current_program_space
->objfiles ())
3785 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3788 expansion_notify
, kind
);
3792 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3793 Map function FUN over every file.
3794 See quick_symbol_functions.map_symbol_filenames for details. */
3797 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3800 for (objfile
*objfile
: current_program_space
->objfiles ())
3803 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3810 namespace selftests
{
3811 namespace filename_language
{
3813 static void test_filename_language ()
3815 /* This test messes up the filename_language_table global. */
3816 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3818 /* Test deducing an unknown extension. */
3819 language lang
= deduce_language_from_filename ("myfile.blah");
3820 SELF_CHECK (lang
== language_unknown
);
3822 /* Test deducing a known extension. */
3823 lang
= deduce_language_from_filename ("myfile.c");
3824 SELF_CHECK (lang
== language_c
);
3826 /* Test adding a new extension using the internal API. */
3827 add_filename_language (".blah", language_pascal
);
3828 lang
= deduce_language_from_filename ("myfile.blah");
3829 SELF_CHECK (lang
== language_pascal
);
3833 test_set_ext_lang_command ()
3835 /* This test messes up the filename_language_table global. */
3836 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3838 /* Confirm that the .hello extension is not known. */
3839 language lang
= deduce_language_from_filename ("cake.hello");
3840 SELF_CHECK (lang
== language_unknown
);
3842 /* Test adding a new extension using the CLI command. */
3843 auto args_holder
= make_unique_xstrdup (".hello rust");
3844 ext_args
= args_holder
.get ();
3845 set_ext_lang_command (NULL
, 1, NULL
);
3847 lang
= deduce_language_from_filename ("cake.hello");
3848 SELF_CHECK (lang
== language_rust
);
3850 /* Test overriding an existing extension using the CLI command. */
3851 int size_before
= filename_language_table
.size ();
3852 args_holder
.reset (xstrdup (".hello pascal"));
3853 ext_args
= args_holder
.get ();
3854 set_ext_lang_command (NULL
, 1, NULL
);
3855 int size_after
= filename_language_table
.size ();
3857 lang
= deduce_language_from_filename ("cake.hello");
3858 SELF_CHECK (lang
== language_pascal
);
3859 SELF_CHECK (size_before
== size_after
);
3862 } /* namespace filename_language */
3863 } /* namespace selftests */
3865 #endif /* GDB_SELF_TEST */
3867 void _initialize_symfile ();
3869 _initialize_symfile ()
3871 struct cmd_list_element
*c
;
3873 gdb::observers::free_objfile
.attach (symfile_free_objfile
);
3875 #define READNOW_READNEVER_HELP \
3876 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3877 immediately. This makes the command slower, but may make future operations\n\
3879 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3880 symbolic debug information."
3882 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3883 Load symbol table from executable file FILE.\n\
3884 Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
3885 OFF is an optional offset which is added to each section address.\n\
3886 The `file' command can also load symbol tables, as well as setting the file\n\
3887 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3888 set_cmd_completer (c
, filename_completer
);
3890 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3891 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3892 Usage: add-symbol-file FILE [-readnow | -readnever] [-o OFF] [ADDR] \
3893 [-s SECT-NAME SECT-ADDR]...\n\
3894 ADDR is the starting address of the file's text.\n\
3895 Each '-s' argument provides a section name and address, and\n\
3896 should be specified if the data and bss segments are not contiguous\n\
3897 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n\
3898 OFF is an optional offset which is added to the default load addresses\n\
3899 of all sections for which no other address was specified.\n"
3900 READNOW_READNEVER_HELP
),
3902 set_cmd_completer (c
, filename_completer
);
3904 c
= add_cmd ("remove-symbol-file", class_files
,
3905 remove_symbol_file_command
, _("\
3906 Remove a symbol file added via the add-symbol-file command.\n\
3907 Usage: remove-symbol-file FILENAME\n\
3908 remove-symbol-file -a ADDRESS\n\
3909 The file to remove can be identified by its filename or by an address\n\
3910 that lies within the boundaries of this symbol file in memory."),
3913 c
= add_cmd ("load", class_files
, load_command
, _("\
3914 Dynamically load FILE into the running program.\n\
3915 FILE symbols are recorded for access from GDB.\n\
3916 Usage: load [FILE] [OFFSET]\n\
3917 An optional load OFFSET may also be given as a literal address.\n\
3918 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3919 on its own."), &cmdlist
);
3920 set_cmd_completer (c
, filename_completer
);
3922 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3923 _("Commands for debugging overlays."), &overlaylist
,
3924 "overlay ", 0, &cmdlist
);
3926 add_com_alias ("ovly", "overlay", class_alias
, 1);
3927 add_com_alias ("ov", "overlay", class_alias
, 1);
3929 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3930 _("Assert that an overlay section is mapped."), &overlaylist
);
3932 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3933 _("Assert that an overlay section is unmapped."), &overlaylist
);
3935 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3936 _("List mappings of overlay sections."), &overlaylist
);
3938 add_cmd ("manual", class_support
, overlay_manual_command
,
3939 _("Enable overlay debugging."), &overlaylist
);
3940 add_cmd ("off", class_support
, overlay_off_command
,
3941 _("Disable overlay debugging."), &overlaylist
);
3942 add_cmd ("auto", class_support
, overlay_auto_command
,
3943 _("Enable automatic overlay debugging."), &overlaylist
);
3944 add_cmd ("load-target", class_support
, overlay_load_command
,
3945 _("Read the overlay mapping state from the target."), &overlaylist
);
3947 /* Filename extension to source language lookup table: */
3948 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3950 Set mapping between filename extension and source language."), _("\
3951 Show mapping between filename extension and source language."), _("\
3952 Usage: set extension-language .foo bar"),
3953 set_ext_lang_command
,
3955 &setlist
, &showlist
);
3957 add_info ("extensions", info_ext_lang_command
,
3958 _("All filename extensions associated with a source language."));
3960 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3961 &debug_file_directory
, _("\
3962 Set the directories where separate debug symbols are searched for."), _("\
3963 Show the directories where separate debug symbols are searched for."), _("\
3964 Separate debug symbols are first searched for in the same\n\
3965 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3966 and lastly at the path of the directory of the binary with\n\
3967 each global debug-file-directory component prepended."),
3969 show_debug_file_directory
,
3970 &setlist
, &showlist
);
3972 add_setshow_enum_cmd ("symbol-loading", no_class
,
3973 print_symbol_loading_enums
, &print_symbol_loading
,
3975 Set printing of symbol loading messages."), _("\
3976 Show printing of symbol loading messages."), _("\
3977 off == turn all messages off\n\
3978 brief == print messages for the executable,\n\
3979 and brief messages for shared libraries\n\
3980 full == print messages for the executable,\n\
3981 and messages for each shared library."),
3984 &setprintlist
, &showprintlist
);
3986 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3987 &separate_debug_file_debug
, _("\
3988 Set printing of separate debug info file search debug."), _("\
3989 Show printing of separate debug info file search debug."), _("\
3990 When on, GDB prints the searched locations while looking for separate debug \
3991 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
3994 selftests::register_test
3995 ("filename_language", selftests::filename_language::test_filename_language
);
3996 selftests::register_test
3997 ("set_ext_lang_command",
3998 selftests::filename_language::test_set_ext_lang_command
);