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 symfile_segment_data_up
721 default_symfile_segments (bfd
*abfd
)
727 /* Relocatable files contain enough information to position each
728 loadable section independently; they should not be relocated
730 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
733 /* Make sure there is at least one loadable section in the file. */
734 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
736 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
744 low
= bfd_section_vma (sect
);
745 high
= low
+ bfd_section_size (sect
);
747 symfile_segment_data_up
data (new symfile_segment_data
);
749 num_sections
= bfd_count_sections (abfd
);
751 /* All elements are initialized to 0 (map to no segment). */
752 data
->segment_info
.resize (num_sections
);
754 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
758 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
761 vma
= bfd_section_vma (sect
);
764 if (vma
+ bfd_section_size (sect
) > high
)
765 high
= vma
+ bfd_section_size (sect
);
767 data
->segment_info
[i
] = 1;
770 data
->segments
.emplace_back (low
, high
- low
);
775 /* This is a convenience function to call sym_read for OBJFILE and
776 possibly force the partial symbols to be read. */
779 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
781 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
782 objfile
->per_bfd
->minsyms_read
= true;
784 /* find_separate_debug_file_in_section should be called only if there is
785 single binary with no existing separate debug info file. */
786 if (!objfile_has_partial_symbols (objfile
)
787 && objfile
->separate_debug_objfile
== NULL
788 && objfile
->separate_debug_objfile_backlink
== NULL
)
790 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
794 /* find_separate_debug_file_in_section uses the same filename for the
795 virtual section-as-bfd like the bfd filename containing the
796 section. Therefore use also non-canonical name form for the same
797 file containing the section. */
798 symbol_file_add_separate (abfd
.get (),
799 bfd_get_filename (abfd
.get ()),
800 add_flags
| SYMFILE_NOT_FILENAME
, objfile
);
803 if ((add_flags
& SYMFILE_NO_READ
) == 0)
804 require_partial_symbols (objfile
, false);
807 /* Initialize entry point information for this objfile. */
810 init_entry_point_info (struct objfile
*objfile
)
812 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
818 /* Save startup file's range of PC addresses to help blockframe.c
819 decide where the bottom of the stack is. */
821 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
823 /* Executable file -- record its entry point so we'll recognize
824 the startup file because it contains the entry point. */
825 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
826 ei
->entry_point_p
= 1;
828 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
829 && bfd_get_start_address (objfile
->obfd
) != 0)
831 /* Some shared libraries may have entry points set and be
832 runnable. There's no clear way to indicate this, so just check
833 for values other than zero. */
834 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
835 ei
->entry_point_p
= 1;
839 /* Examination of non-executable.o files. Short-circuit this stuff. */
840 ei
->entry_point_p
= 0;
843 if (ei
->entry_point_p
)
845 struct obj_section
*osect
;
846 CORE_ADDR entry_point
= ei
->entry_point
;
849 /* Make certain that the address points at real code, and not a
850 function descriptor. */
852 = gdbarch_convert_from_func_ptr_addr (objfile
->arch (),
854 current_top_target ());
856 /* Remove any ISA markers, so that this matches entries in the
859 = gdbarch_addr_bits_remove (objfile
->arch (), entry_point
);
862 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
864 struct bfd_section
*sect
= osect
->the_bfd_section
;
866 if (entry_point
>= bfd_section_vma (sect
)
867 && entry_point
< (bfd_section_vma (sect
)
868 + bfd_section_size (sect
)))
870 ei
->the_bfd_section_index
871 = gdb_bfd_section_index (objfile
->obfd
, sect
);
878 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
882 /* Process a symbol file, as either the main file or as a dynamically
885 This function does not set the OBJFILE's entry-point info.
887 OBJFILE is where the symbols are to be read from.
889 ADDRS is the list of section load addresses. If the user has given
890 an 'add-symbol-file' command, then this is the list of offsets and
891 addresses he or she provided as arguments to the command; or, if
892 we're handling a shared library, these are the actual addresses the
893 sections are loaded at, according to the inferior's dynamic linker
894 (as gleaned by GDB's shared library code). We convert each address
895 into an offset from the section VMA's as it appears in the object
896 file, and then call the file's sym_offsets function to convert this
897 into a format-specific offset table --- a `section_offsets'.
898 The sectindex field is used to control the ordering of sections
899 with the same name. Upon return, it is updated to contain the
900 corresponding BFD section index, or -1 if the section was not found.
902 ADD_FLAGS encodes verbosity level, whether this is main symbol or
903 an extra symbol file such as dynamically loaded code, and whether
904 breakpoint reset should be deferred. */
907 syms_from_objfile_1 (struct objfile
*objfile
,
908 section_addr_info
*addrs
,
909 symfile_add_flags add_flags
)
911 section_addr_info local_addr
;
912 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
914 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
916 if (objfile
->sf
== NULL
)
918 /* No symbols to load, but we still need to make sure
919 that the section_offsets table is allocated. */
920 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
922 objfile
->section_offsets
.assign (num_sections
, 0);
926 /* Make sure that partially constructed symbol tables will be cleaned up
927 if an error occurs during symbol reading. */
928 gdb::optional
<clear_symtab_users_cleanup
> defer_clear_users
;
930 objfile_up
objfile_holder (objfile
);
932 /* If ADDRS is NULL, put together a dummy address list.
933 We now establish the convention that an addr of zero means
934 no load address was specified. */
940 /* We will modify the main symbol table, make sure that all its users
941 will be cleaned up if an error occurs during symbol reading. */
942 defer_clear_users
.emplace ((symfile_add_flag
) 0);
944 /* Since no error yet, throw away the old symbol table. */
946 if (symfile_objfile
!= NULL
)
948 symfile_objfile
->unlink ();
949 gdb_assert (symfile_objfile
== NULL
);
952 /* Currently we keep symbols from the add-symbol-file command.
953 If the user wants to get rid of them, they should do "symbol-file"
954 without arguments first. Not sure this is the best behavior
957 (*objfile
->sf
->sym_new_init
) (objfile
);
960 /* Convert addr into an offset rather than an absolute address.
961 We find the lowest address of a loaded segment in the objfile,
962 and assume that <addr> is where that got loaded.
964 We no longer warn if the lowest section is not a text segment (as
965 happens for the PA64 port. */
966 if (addrs
->size () > 0)
967 addr_info_make_relative (addrs
, objfile
->obfd
);
969 /* Initialize symbol reading routines for this objfile, allow complaints to
970 appear for this new file, and record how verbose to be, then do the
971 initial symbol reading for this file. */
973 (*objfile
->sf
->sym_init
) (objfile
);
976 (*objfile
->sf
->sym_offsets
) (objfile
, *addrs
);
978 read_symbols (objfile
, add_flags
);
980 /* Discard cleanups as symbol reading was successful. */
982 objfile_holder
.release ();
983 if (defer_clear_users
)
984 defer_clear_users
->release ();
987 /* Same as syms_from_objfile_1, but also initializes the objfile
991 syms_from_objfile (struct objfile
*objfile
,
992 section_addr_info
*addrs
,
993 symfile_add_flags add_flags
)
995 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
996 init_entry_point_info (objfile
);
999 /* Perform required actions after either reading in the initial
1000 symbols for a new objfile, or mapping in the symbols from a reusable
1001 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1004 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1006 /* If this is the main symbol file we have to clean up all users of the
1007 old main symbol file. Otherwise it is sufficient to fixup all the
1008 breakpoints that may have been redefined by this symbol file. */
1009 if (add_flags
& SYMFILE_MAINLINE
)
1011 /* OK, make it the "real" symbol file. */
1012 symfile_objfile
= objfile
;
1014 clear_symtab_users (add_flags
);
1016 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1018 breakpoint_re_set ();
1021 /* We're done reading the symbol file; finish off complaints. */
1022 clear_complaints ();
1025 /* Process a symbol file, as either the main file or as a dynamically
1028 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1029 A new reference is acquired by this function.
1031 For NAME description see the objfile constructor.
1033 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1034 extra, such as dynamically loaded code, and what to do with breakpoints.
1036 ADDRS is as described for syms_from_objfile_1, above.
1037 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1039 PARENT is the original objfile if ABFD is a separate debug info file.
1040 Otherwise PARENT is NULL.
1042 Upon success, returns a pointer to the objfile that was added.
1043 Upon failure, jumps back to command level (never returns). */
1045 static struct objfile
*
1046 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1047 symfile_add_flags add_flags
,
1048 section_addr_info
*addrs
,
1049 objfile_flags flags
, struct objfile
*parent
)
1051 struct objfile
*objfile
;
1052 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1053 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1054 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1055 && (readnow_symbol_files
1056 || (add_flags
& SYMFILE_NO_READ
) == 0));
1058 if (readnow_symbol_files
)
1060 flags
|= OBJF_READNOW
;
1061 add_flags
&= ~SYMFILE_NO_READ
;
1063 else if (readnever_symbol_files
1064 || (parent
!= NULL
&& (parent
->flags
& OBJF_READNEVER
)))
1066 flags
|= OBJF_READNEVER
;
1067 add_flags
|= SYMFILE_NO_READ
;
1069 if ((add_flags
& SYMFILE_NOT_FILENAME
) != 0)
1070 flags
|= OBJF_NOT_FILENAME
;
1072 /* Give user a chance to burp if we'd be
1073 interactively wiping out any existing symbols. */
1075 if ((have_full_symbols () || have_partial_symbols ())
1078 && !query (_("Load new symbol table from \"%s\"? "), name
))
1079 error (_("Not confirmed."));
1082 flags
|= OBJF_MAINLINE
;
1083 objfile
= objfile::make (abfd
, name
, flags
, parent
);
1085 /* We either created a new mapped symbol table, mapped an existing
1086 symbol table file which has not had initial symbol reading
1087 performed, or need to read an unmapped symbol table. */
1090 if (deprecated_pre_add_symbol_hook
)
1091 deprecated_pre_add_symbol_hook (name
);
1093 printf_filtered (_("Reading symbols from %ps...\n"),
1094 styled_string (file_name_style
.style (), name
));
1096 syms_from_objfile (objfile
, addrs
, add_flags
);
1098 /* We now have at least a partial symbol table. Check to see if the
1099 user requested that all symbols be read on initial access via either
1100 the gdb startup command line or on a per symbol file basis. Expand
1101 all partial symbol tables for this objfile if so. */
1103 if ((flags
& OBJF_READNOW
))
1106 printf_filtered (_("Expanding full symbols from %ps...\n"),
1107 styled_string (file_name_style
.style (), name
));
1110 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1113 /* Note that we only print a message if we have no symbols and have
1114 no separate debug file. If there is a separate debug file which
1115 does not have symbols, we'll have emitted this message for that
1116 file, and so printing it twice is just redundant. */
1117 if (should_print
&& !objfile_has_symbols (objfile
)
1118 && objfile
->separate_debug_objfile
== nullptr)
1119 printf_filtered (_("(No debugging symbols found in %ps)\n"),
1120 styled_string (file_name_style
.style (), name
));
1124 if (deprecated_post_add_symbol_hook
)
1125 deprecated_post_add_symbol_hook ();
1128 /* We print some messages regardless of whether 'from_tty ||
1129 info_verbose' is true, so make sure they go out at the right
1131 gdb_flush (gdb_stdout
);
1133 if (objfile
->sf
== NULL
)
1135 gdb::observers::new_objfile
.notify (objfile
);
1136 return objfile
; /* No symbols. */
1139 finish_new_objfile (objfile
, add_flags
);
1141 gdb::observers::new_objfile
.notify (objfile
);
1143 bfd_cache_close_all ();
1147 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1148 see the objfile constructor. */
1151 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1152 symfile_add_flags symfile_flags
,
1153 struct objfile
*objfile
)
1155 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1156 because sections of BFD may not match sections of OBJFILE and because
1157 vma may have been modified by tools such as prelink. */
1158 section_addr_info sap
= build_section_addr_info_from_objfile (objfile
);
1160 symbol_file_add_with_addrs
1161 (bfd
, name
, symfile_flags
, &sap
,
1162 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1163 | OBJF_USERLOADED
| OBJF_MAINLINE
),
1167 /* Process the symbol file ABFD, as either the main file or as a
1168 dynamically loaded file.
1169 See symbol_file_add_with_addrs's comments for details. */
1172 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1173 symfile_add_flags add_flags
,
1174 section_addr_info
*addrs
,
1175 objfile_flags flags
, struct objfile
*parent
)
1177 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1181 /* Process a symbol file, as either the main file or as a dynamically
1182 loaded file. See symbol_file_add_with_addrs's comments for details. */
1185 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1186 section_addr_info
*addrs
, objfile_flags flags
)
1188 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1190 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1194 /* Call symbol_file_add() with default values and update whatever is
1195 affected by the loading of a new main().
1196 Used when the file is supplied in the gdb command line
1197 and by some targets with special loading requirements.
1198 The auxiliary function, symbol_file_add_main_1(), has the flags
1199 argument for the switches that can only be specified in the symbol_file
1203 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1205 symbol_file_add_main_1 (args
, add_flags
, 0, 0);
1209 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1210 objfile_flags flags
, CORE_ADDR reloff
)
1212 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1214 struct objfile
*objfile
= symbol_file_add (args
, add_flags
, NULL
, flags
);
1216 objfile_rebase (objfile
, reloff
);
1218 /* Getting new symbols may change our opinion about
1219 what is frameless. */
1220 reinit_frame_cache ();
1222 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1223 set_initial_language ();
1227 symbol_file_clear (int from_tty
)
1229 if ((have_full_symbols () || have_partial_symbols ())
1232 ? !query (_("Discard symbol table from `%s'? "),
1233 objfile_name (symfile_objfile
))
1234 : !query (_("Discard symbol table? "))))
1235 error (_("Not confirmed."));
1237 /* solib descriptors may have handles to objfiles. Wipe them before their
1238 objfiles get stale by free_all_objfiles. */
1239 no_shared_libraries (NULL
, from_tty
);
1241 current_program_space
->free_all_objfiles ();
1243 clear_symtab_users (0);
1245 gdb_assert (symfile_objfile
== NULL
);
1247 printf_filtered (_("No symbol file now.\n"));
1250 /* See symfile.h. */
1252 bool separate_debug_file_debug
= false;
1255 separate_debug_file_exists (const std::string
&name
, unsigned long crc
,
1256 struct objfile
*parent_objfile
)
1258 unsigned long file_crc
;
1260 struct stat parent_stat
, abfd_stat
;
1261 int verified_as_different
;
1263 /* Find a separate debug info file as if symbols would be present in
1264 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1265 section can contain just the basename of PARENT_OBJFILE without any
1266 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1267 the separate debug infos with the same basename can exist. */
1269 if (filename_cmp (name
.c_str (), objfile_name (parent_objfile
)) == 0)
1272 if (separate_debug_file_debug
)
1274 printf_filtered (_(" Trying %s..."), name
.c_str ());
1275 gdb_flush (gdb_stdout
);
1278 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
.c_str (), gnutarget
));
1282 if (separate_debug_file_debug
)
1283 printf_filtered (_(" no, unable to open.\n"));
1288 /* Verify symlinks were not the cause of filename_cmp name difference above.
1290 Some operating systems, e.g. Windows, do not provide a meaningful
1291 st_ino; they always set it to zero. (Windows does provide a
1292 meaningful st_dev.) Files accessed from gdbservers that do not
1293 support the vFile:fstat packet will also have st_ino set to zero.
1294 Do not indicate a duplicate library in either case. While there
1295 is no guarantee that a system that provides meaningful inode
1296 numbers will never set st_ino to zero, this is merely an
1297 optimization, so we do not need to worry about false negatives. */
1299 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1300 && abfd_stat
.st_ino
!= 0
1301 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1303 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1304 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1306 if (separate_debug_file_debug
)
1307 printf_filtered (_(" no, same file as the objfile.\n"));
1311 verified_as_different
= 1;
1314 verified_as_different
= 0;
1316 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1320 if (separate_debug_file_debug
)
1321 printf_filtered (_(" no, error computing CRC.\n"));
1326 if (crc
!= file_crc
)
1328 unsigned long parent_crc
;
1330 /* If the files could not be verified as different with
1331 bfd_stat then we need to calculate the parent's CRC
1332 to verify whether the files are different or not. */
1334 if (!verified_as_different
)
1336 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1338 if (separate_debug_file_debug
)
1339 printf_filtered (_(" no, error computing CRC.\n"));
1345 if (verified_as_different
|| parent_crc
!= file_crc
)
1346 warning (_("the debug information found in \"%s\""
1347 " does not match \"%s\" (CRC mismatch).\n"),
1348 name
.c_str (), objfile_name (parent_objfile
));
1350 if (separate_debug_file_debug
)
1351 printf_filtered (_(" no, CRC doesn't match.\n"));
1356 if (separate_debug_file_debug
)
1357 printf_filtered (_(" yes!\n"));
1362 char *debug_file_directory
= NULL
;
1364 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1365 struct cmd_list_element
*c
, const char *value
)
1367 fprintf_filtered (file
,
1368 _("The directory where separate debug "
1369 "symbols are searched for is \"%s\".\n"),
1373 #if ! defined (DEBUG_SUBDIRECTORY)
1374 #define DEBUG_SUBDIRECTORY ".debug"
1377 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1378 where the original file resides (may not be the same as
1379 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1380 looking for. CANON_DIR is the "realpath" form of DIR.
1381 DIR must contain a trailing '/'.
1382 Returns the path of the file with separate debug info, or an empty
1386 find_separate_debug_file (const char *dir
,
1387 const char *canon_dir
,
1388 const char *debuglink
,
1389 unsigned long crc32
, struct objfile
*objfile
)
1391 if (separate_debug_file_debug
)
1392 printf_filtered (_("\nLooking for separate debug info (debug link) for "
1393 "%s\n"), objfile_name (objfile
));
1395 /* First try in the same directory as the original file. */
1396 std::string debugfile
= dir
;
1397 debugfile
+= debuglink
;
1399 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1402 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1404 debugfile
+= DEBUG_SUBDIRECTORY
;
1406 debugfile
+= debuglink
;
1408 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1411 /* Then try in the global debugfile directories.
1413 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1414 cause "/..." lookups. */
1416 bool target_prefix
= startswith (dir
, "target:");
1417 const char *dir_notarget
= target_prefix
? dir
+ strlen ("target:") : dir
;
1418 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
1419 = dirnames_to_char_ptr_vec (debug_file_directory
);
1420 gdb::unique_xmalloc_ptr
<char> canon_sysroot
= gdb_realpath (gdb_sysroot
);
1422 /* MS-Windows/MS-DOS don't allow colons in file names; we must
1423 convert the drive letter into a one-letter directory, so that the
1424 file name resulting from splicing below will be valid.
1426 FIXME: The below only works when GDB runs on MS-Windows/MS-DOS.
1427 There are various remote-debugging scenarios where such a
1428 transformation of the drive letter might be required when GDB runs
1429 on a Posix host, see
1431 https://sourceware.org/ml/gdb-patches/2019-04/msg00605.html
1433 If some of those scenarios need to be supported, we will need to
1434 use a different condition for HAS_DRIVE_SPEC and a different macro
1435 instead of STRIP_DRIVE_SPEC, which work on Posix systems as well. */
1437 if (HAS_DRIVE_SPEC (dir_notarget
))
1439 drive
= dir_notarget
[0];
1440 dir_notarget
= STRIP_DRIVE_SPEC (dir_notarget
);
1443 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
1445 debugfile
= target_prefix
? "target:" : "";
1446 debugfile
+= debugdir
.get ();
1449 debugfile
+= dir_notarget
;
1450 debugfile
+= debuglink
;
1452 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1455 const char *base_path
= NULL
;
1456 if (canon_dir
!= NULL
)
1458 if (canon_sysroot
.get () != NULL
)
1459 base_path
= child_path (canon_sysroot
.get (), canon_dir
);
1461 base_path
= child_path (gdb_sysroot
, canon_dir
);
1463 if (base_path
!= NULL
)
1465 /* If the file is in the sysroot, try using its base path in
1466 the global debugfile directory. */
1467 debugfile
= target_prefix
? "target:" : "";
1468 debugfile
+= debugdir
.get ();
1470 debugfile
+= base_path
;
1472 debugfile
+= debuglink
;
1474 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1477 /* If the file is in the sysroot, try using its base path in
1478 the sysroot's global debugfile directory. */
1479 debugfile
= target_prefix
? "target:" : "";
1480 debugfile
+= gdb_sysroot
;
1481 debugfile
+= debugdir
.get ();
1483 debugfile
+= base_path
;
1485 debugfile
+= debuglink
;
1487 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1493 return std::string ();
1496 /* Modify PATH to contain only "[/]directory/" part of PATH.
1497 If there were no directory separators in PATH, PATH will be empty
1498 string on return. */
1501 terminate_after_last_dir_separator (char *path
)
1505 /* Strip off the final filename part, leaving the directory name,
1506 followed by a slash. The directory can be relative or absolute. */
1507 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1508 if (IS_DIR_SEPARATOR (path
[i
]))
1511 /* If I is -1 then no directory is present there and DIR will be "". */
1515 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1516 Returns pathname, or an empty string. */
1519 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1521 unsigned long crc32
;
1523 gdb::unique_xmalloc_ptr
<char> debuglink
1524 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1526 if (debuglink
== NULL
)
1528 /* There's no separate debug info, hence there's no way we could
1529 load it => no warning. */
1530 return std::string ();
1533 std::string dir
= objfile_name (objfile
);
1534 terminate_after_last_dir_separator (&dir
[0]);
1535 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1537 std::string debugfile
1538 = find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1539 debuglink
.get (), crc32
, objfile
);
1541 if (debugfile
.empty ())
1543 /* For PR gdb/9538, try again with realpath (if different from the
1548 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1549 && S_ISLNK (st_buf
.st_mode
))
1551 gdb::unique_xmalloc_ptr
<char> symlink_dir
1552 (lrealpath (objfile_name (objfile
)));
1553 if (symlink_dir
!= NULL
)
1555 terminate_after_last_dir_separator (symlink_dir
.get ());
1556 if (dir
!= symlink_dir
.get ())
1558 /* Different directory, so try using it. */
1559 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1572 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1576 validate_readnow_readnever (objfile_flags flags
)
1578 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1579 error (_("-readnow and -readnever cannot be used simultaneously"));
1582 /* This is the symbol-file command. Read the file, analyze its
1583 symbols, and add a struct symtab to a symtab list. The syntax of
1584 the command is rather bizarre:
1586 1. The function buildargv implements various quoting conventions
1587 which are undocumented and have little or nothing in common with
1588 the way things are quoted (or not quoted) elsewhere in GDB.
1590 2. Options are used, which are not generally used in GDB (perhaps
1591 "set mapped on", "set readnow on" would be better)
1593 3. The order of options matters, which is contrary to GNU
1594 conventions (because it is confusing and inconvenient). */
1597 symbol_file_command (const char *args
, int from_tty
)
1603 symbol_file_clear (from_tty
);
1607 objfile_flags flags
= OBJF_USERLOADED
;
1608 symfile_add_flags add_flags
= 0;
1610 bool stop_processing_options
= false;
1611 CORE_ADDR offset
= 0;
1616 add_flags
|= SYMFILE_VERBOSE
;
1618 gdb_argv
built_argv (args
);
1619 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1621 if (stop_processing_options
|| *arg
!= '-')
1626 error (_("Unrecognized argument \"%s\""), arg
);
1628 else if (strcmp (arg
, "-readnow") == 0)
1629 flags
|= OBJF_READNOW
;
1630 else if (strcmp (arg
, "-readnever") == 0)
1631 flags
|= OBJF_READNEVER
;
1632 else if (strcmp (arg
, "-o") == 0)
1634 arg
= built_argv
[++idx
];
1636 error (_("Missing argument to -o"));
1638 offset
= parse_and_eval_address (arg
);
1640 else if (strcmp (arg
, "--") == 0)
1641 stop_processing_options
= true;
1643 error (_("Unrecognized argument \"%s\""), arg
);
1647 error (_("no symbol file name was specified"));
1649 validate_readnow_readnever (flags
);
1651 /* Set SYMFILE_DEFER_BP_RESET because the proper displacement for a PIE
1652 (Position Independent Executable) main symbol file will only be
1653 computed by the solib_create_inferior_hook below. Without it,
1654 breakpoint_re_set would fail to insert the breakpoints with the zero
1656 add_flags
|= SYMFILE_DEFER_BP_RESET
;
1658 symbol_file_add_main_1 (name
, add_flags
, flags
, offset
);
1660 solib_create_inferior_hook (from_tty
);
1662 /* Now it's safe to re-add the breakpoints. */
1663 breakpoint_re_set ();
1667 /* Set the initial language. */
1670 set_initial_language (void)
1672 if (language_mode
== language_mode_manual
)
1674 enum language lang
= main_language ();
1675 /* Make C the default language. */
1676 enum language default_lang
= language_c
;
1678 if (lang
== language_unknown
)
1680 const char *name
= main_name ();
1682 = lookup_symbol_in_language (name
, NULL
, VAR_DOMAIN
, default_lang
,
1686 lang
= sym
->language ();
1689 if (lang
== language_unknown
)
1691 lang
= default_lang
;
1694 set_language (lang
);
1695 expected_language
= current_language
; /* Don't warn the user. */
1698 /* Open the file specified by NAME and hand it off to BFD for
1699 preliminary analysis. Return a newly initialized bfd *, which
1700 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1701 absolute). In case of trouble, error() is called. */
1704 symfile_bfd_open (const char *name
)
1708 gdb::unique_xmalloc_ptr
<char> absolute_name
;
1709 if (!is_target_filename (name
))
1711 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1713 /* Look down path for it, allocate 2nd new malloc'd copy. */
1714 desc
= openp (getenv ("PATH"),
1715 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1716 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1717 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1720 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1722 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1723 desc
= openp (getenv ("PATH"),
1724 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1725 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1729 perror_with_name (expanded_name
.get ());
1731 name
= absolute_name
.get ();
1734 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1735 if (sym_bfd
== NULL
)
1736 error (_("`%s': can't open to read symbols: %s."), name
,
1737 bfd_errmsg (bfd_get_error ()));
1739 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1740 bfd_set_cacheable (sym_bfd
.get (), 1);
1742 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1743 error (_("`%s': can't read symbols: %s."), name
,
1744 bfd_errmsg (bfd_get_error ()));
1749 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1750 the section was not found. */
1753 get_section_index (struct objfile
*objfile
, const char *section_name
)
1755 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1763 /* Link SF into the global symtab_fns list.
1764 FLAVOUR is the file format that SF handles.
1765 Called on startup by the _initialize routine in each object file format
1766 reader, to register information about each format the reader is prepared
1770 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1772 symtab_fns
.emplace_back (flavour
, sf
);
1775 /* Initialize OBJFILE to read symbols from its associated BFD. It
1776 either returns or calls error(). The result is an initialized
1777 struct sym_fns in the objfile structure, that contains cached
1778 information about the symbol file. */
1780 static const struct sym_fns
*
1781 find_sym_fns (bfd
*abfd
)
1783 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1785 if (our_flavour
== bfd_target_srec_flavour
1786 || our_flavour
== bfd_target_ihex_flavour
1787 || our_flavour
== bfd_target_tekhex_flavour
)
1788 return NULL
; /* No symbols. */
1790 for (const registered_sym_fns
&rsf
: symtab_fns
)
1791 if (our_flavour
== rsf
.sym_flavour
)
1794 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1795 bfd_get_target (abfd
));
1799 /* This function runs the load command of our current target. */
1802 load_command (const char *arg
, int from_tty
)
1806 /* The user might be reloading because the binary has changed. Take
1807 this opportunity to check. */
1808 reopen_exec_file ();
1814 const char *parg
, *prev
;
1816 arg
= get_exec_file (1);
1818 /* We may need to quote this string so buildargv can pull it
1821 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1823 temp
.append (prev
, parg
- prev
);
1825 temp
.push_back ('\\');
1827 /* If we have not copied anything yet, then we didn't see a
1828 character to quote, and we can just leave ARG unchanged. */
1832 arg
= temp
.c_str ();
1836 target_load (arg
, from_tty
);
1838 /* After re-loading the executable, we don't really know which
1839 overlays are mapped any more. */
1840 overlay_cache_invalid
= 1;
1843 /* This version of "load" should be usable for any target. Currently
1844 it is just used for remote targets, not inftarg.c or core files,
1845 on the theory that only in that case is it useful.
1847 Avoiding xmodem and the like seems like a win (a) because we don't have
1848 to worry about finding it, and (b) On VMS, fork() is very slow and so
1849 we don't want to run a subprocess. On the other hand, I'm not sure how
1850 performance compares. */
1852 static int validate_download
= 0;
1854 /* Callback service function for generic_load (bfd_map_over_sections). */
1857 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1859 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1861 *sum
+= bfd_section_size (asec
);
1864 /* Opaque data for load_progress. */
1865 struct load_progress_data
1867 /* Cumulative data. */
1868 unsigned long write_count
= 0;
1869 unsigned long data_count
= 0;
1870 bfd_size_type total_size
= 0;
1873 /* Opaque data for load_progress for a single section. */
1874 struct load_progress_section_data
1876 load_progress_section_data (load_progress_data
*cumulative_
,
1877 const char *section_name_
, ULONGEST section_size_
,
1878 CORE_ADDR lma_
, gdb_byte
*buffer_
)
1879 : cumulative (cumulative_
), section_name (section_name_
),
1880 section_size (section_size_
), lma (lma_
), buffer (buffer_
)
1883 struct load_progress_data
*cumulative
;
1885 /* Per-section data. */
1886 const char *section_name
;
1887 ULONGEST section_sent
= 0;
1888 ULONGEST section_size
;
1893 /* Opaque data for load_section_callback. */
1894 struct load_section_data
1896 load_section_data (load_progress_data
*progress_data_
)
1897 : progress_data (progress_data_
)
1900 ~load_section_data ()
1902 for (auto &&request
: requests
)
1904 xfree (request
.data
);
1905 delete ((load_progress_section_data
*) request
.baton
);
1909 CORE_ADDR load_offset
= 0;
1910 struct load_progress_data
*progress_data
;
1911 std::vector
<struct memory_write_request
> requests
;
1914 /* Target write callback routine for progress reporting. */
1917 load_progress (ULONGEST bytes
, void *untyped_arg
)
1919 struct load_progress_section_data
*args
1920 = (struct load_progress_section_data
*) untyped_arg
;
1921 struct load_progress_data
*totals
;
1924 /* Writing padding data. No easy way to get at the cumulative
1925 stats, so just ignore this. */
1928 totals
= args
->cumulative
;
1930 if (bytes
== 0 && args
->section_sent
== 0)
1932 /* The write is just starting. Let the user know we've started
1934 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1936 hex_string (args
->section_size
),
1937 paddress (target_gdbarch (), args
->lma
));
1941 if (validate_download
)
1943 /* Broken memories and broken monitors manifest themselves here
1944 when bring new computers to life. This doubles already slow
1946 /* NOTE: cagney/1999-10-18: A more efficient implementation
1947 might add a verify_memory() method to the target vector and
1948 then use that. remote.c could implement that method using
1949 the ``qCRC'' packet. */
1950 gdb::byte_vector
check (bytes
);
1952 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1953 error (_("Download verify read failed at %s"),
1954 paddress (target_gdbarch (), args
->lma
));
1955 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1956 error (_("Download verify compare failed at %s"),
1957 paddress (target_gdbarch (), args
->lma
));
1959 totals
->data_count
+= bytes
;
1961 args
->buffer
+= bytes
;
1962 totals
->write_count
+= 1;
1963 args
->section_sent
+= bytes
;
1964 if (check_quit_flag ()
1965 || (deprecated_ui_load_progress_hook
!= NULL
1966 && deprecated_ui_load_progress_hook (args
->section_name
,
1967 args
->section_sent
)))
1968 error (_("Canceled the download"));
1970 if (deprecated_show_load_progress
!= NULL
)
1971 deprecated_show_load_progress (args
->section_name
,
1975 totals
->total_size
);
1978 /* Callback service function for generic_load (bfd_map_over_sections). */
1981 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1983 struct load_section_data
*args
= (struct load_section_data
*) data
;
1984 bfd_size_type size
= bfd_section_size (asec
);
1985 const char *sect_name
= bfd_section_name (asec
);
1987 if ((bfd_section_flags (asec
) & SEC_LOAD
) == 0)
1993 ULONGEST begin
= bfd_section_lma (asec
) + args
->load_offset
;
1994 ULONGEST end
= begin
+ size
;
1995 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (size
);
1996 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1998 load_progress_section_data
*section_data
1999 = new load_progress_section_data (args
->progress_data
, sect_name
, size
,
2002 args
->requests
.emplace_back (begin
, end
, buffer
, section_data
);
2005 static void print_transfer_performance (struct ui_file
*stream
,
2006 unsigned long data_count
,
2007 unsigned long write_count
,
2008 std::chrono::steady_clock::duration d
);
2010 /* See symfile.h. */
2013 generic_load (const char *args
, int from_tty
)
2015 struct load_progress_data total_progress
;
2016 struct load_section_data
cbdata (&total_progress
);
2017 struct ui_out
*uiout
= current_uiout
;
2020 error_no_arg (_("file to load"));
2022 gdb_argv
argv (args
);
2024 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2026 if (argv
[1] != NULL
)
2030 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2032 /* If the last word was not a valid number then
2033 treat it as a file name with spaces in. */
2034 if (argv
[1] == endptr
)
2035 error (_("Invalid download offset:%s."), argv
[1]);
2037 if (argv
[2] != NULL
)
2038 error (_("Too many parameters."));
2041 /* Open the file for loading. */
2042 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
));
2043 if (loadfile_bfd
== NULL
)
2044 perror_with_name (filename
.get ());
2046 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2048 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2049 bfd_errmsg (bfd_get_error ()));
2052 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
2053 (void *) &total_progress
.total_size
);
2055 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
2057 using namespace std::chrono
;
2059 steady_clock::time_point start_time
= steady_clock::now ();
2061 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2062 load_progress
) != 0)
2063 error (_("Load failed"));
2065 steady_clock::time_point end_time
= steady_clock::now ();
2067 CORE_ADDR entry
= bfd_get_start_address (loadfile_bfd
.get ());
2068 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2069 uiout
->text ("Start address ");
2070 uiout
->field_core_addr ("address", target_gdbarch (), entry
);
2071 uiout
->text (", load size ");
2072 uiout
->field_unsigned ("load-size", total_progress
.data_count
);
2074 regcache_write_pc (get_current_regcache (), entry
);
2076 /* Reset breakpoints, now that we have changed the load image. For
2077 instance, breakpoints may have been set (or reset, by
2078 post_create_inferior) while connected to the target but before we
2079 loaded the program. In that case, the prologue analyzer could
2080 have read instructions from the target to find the right
2081 breakpoint locations. Loading has changed the contents of that
2084 breakpoint_re_set ();
2086 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2087 total_progress
.write_count
,
2088 end_time
- start_time
);
2091 /* Report on STREAM the performance of a memory transfer operation,
2092 such as 'load'. DATA_COUNT is the number of bytes transferred.
2093 WRITE_COUNT is the number of separate write operations, or 0, if
2094 that information is not available. TIME is how long the operation
2098 print_transfer_performance (struct ui_file
*stream
,
2099 unsigned long data_count
,
2100 unsigned long write_count
,
2101 std::chrono::steady_clock::duration time
)
2103 using namespace std::chrono
;
2104 struct ui_out
*uiout
= current_uiout
;
2106 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2108 uiout
->text ("Transfer rate: ");
2109 if (ms
.count () > 0)
2111 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2113 if (uiout
->is_mi_like_p ())
2115 uiout
->field_unsigned ("transfer-rate", rate
* 8);
2116 uiout
->text (" bits/sec");
2118 else if (rate
< 1024)
2120 uiout
->field_unsigned ("transfer-rate", rate
);
2121 uiout
->text (" bytes/sec");
2125 uiout
->field_unsigned ("transfer-rate", rate
/ 1024);
2126 uiout
->text (" KB/sec");
2131 uiout
->field_unsigned ("transferred-bits", (data_count
* 8));
2132 uiout
->text (" bits in <1 sec");
2134 if (write_count
> 0)
2137 uiout
->field_unsigned ("write-rate", data_count
/ write_count
);
2138 uiout
->text (" bytes/write");
2140 uiout
->text (".\n");
2143 /* Add an OFFSET to the start address of each section in OBJF, except
2144 sections that were specified in ADDRS. */
2147 set_objfile_default_section_offset (struct objfile
*objf
,
2148 const section_addr_info
&addrs
,
2151 /* Add OFFSET to all sections by default. */
2152 section_offsets
offsets (objf
->section_offsets
.size (), offset
);
2154 /* Create sorted lists of all sections in ADDRS as well as all
2155 sections in OBJF. */
2157 std::vector
<const struct other_sections
*> addrs_sorted
2158 = addrs_section_sort (addrs
);
2160 section_addr_info objf_addrs
2161 = build_section_addr_info_from_objfile (objf
);
2162 std::vector
<const struct other_sections
*> objf_addrs_sorted
2163 = addrs_section_sort (objf_addrs
);
2165 /* Walk the BFD section list, and if a matching section is found in
2166 ADDRS_SORTED_LIST, set its offset to zero to keep its address
2169 Note that both lists may contain multiple sections with the same
2170 name, and then the sections from ADDRS are matched in BFD order
2171 (thanks to sectindex). */
2173 std::vector
<const struct other_sections
*>::iterator addrs_sorted_iter
2174 = addrs_sorted
.begin ();
2175 for (const other_sections
*objf_sect
: objf_addrs_sorted
)
2177 const char *objf_name
= addr_section_name (objf_sect
->name
.c_str ());
2180 while (cmp
< 0 && addrs_sorted_iter
!= addrs_sorted
.end ())
2182 const struct other_sections
*sect
= *addrs_sorted_iter
;
2183 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
2184 cmp
= strcmp (sect_name
, objf_name
);
2186 ++addrs_sorted_iter
;
2190 offsets
[objf_sect
->sectindex
] = 0;
2193 /* Apply the new section offsets. */
2194 objfile_relocate (objf
, offsets
);
2197 /* This function allows the addition of incrementally linked object files.
2198 It does not modify any state in the target, only in the debugger. */
2201 add_symbol_file_command (const char *args
, int from_tty
)
2203 struct gdbarch
*gdbarch
= get_current_arch ();
2204 gdb::unique_xmalloc_ptr
<char> filename
;
2207 struct objfile
*objf
;
2208 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2209 symfile_add_flags add_flags
= 0;
2212 add_flags
|= SYMFILE_VERBOSE
;
2220 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2221 bool stop_processing_options
= false;
2222 CORE_ADDR offset
= 0;
2227 error (_("add-symbol-file takes a file name and an address"));
2229 bool seen_addr
= false;
2230 bool seen_offset
= false;
2231 gdb_argv
argv (args
);
2233 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2235 if (stop_processing_options
|| *arg
!= '-')
2237 if (filename
== NULL
)
2239 /* First non-option argument is always the filename. */
2240 filename
.reset (tilde_expand (arg
));
2242 else if (!seen_addr
)
2244 /* The second non-option argument is always the text
2245 address at which to load the program. */
2246 sect_opts
[0].value
= arg
;
2250 error (_("Unrecognized argument \"%s\""), arg
);
2252 else if (strcmp (arg
, "-readnow") == 0)
2253 flags
|= OBJF_READNOW
;
2254 else if (strcmp (arg
, "-readnever") == 0)
2255 flags
|= OBJF_READNEVER
;
2256 else if (strcmp (arg
, "-s") == 0)
2258 if (argv
[argcnt
+ 1] == NULL
)
2259 error (_("Missing section name after \"-s\""));
2260 else if (argv
[argcnt
+ 2] == NULL
)
2261 error (_("Missing section address after \"-s\""));
2263 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2265 sect_opts
.push_back (sect
);
2268 else if (strcmp (arg
, "-o") == 0)
2270 arg
= argv
[++argcnt
];
2272 error (_("Missing argument to -o"));
2274 offset
= parse_and_eval_address (arg
);
2277 else if (strcmp (arg
, "--") == 0)
2278 stop_processing_options
= true;
2280 error (_("Unrecognized argument \"%s\""), arg
);
2283 if (filename
== NULL
)
2284 error (_("You must provide a filename to be loaded."));
2286 validate_readnow_readnever (flags
);
2288 /* Print the prompt for the query below. And save the arguments into
2289 a sect_addr_info structure to be passed around to other
2290 functions. We have to split this up into separate print
2291 statements because hex_string returns a local static
2294 printf_unfiltered (_("add symbol table from file \"%s\""),
2296 section_addr_info section_addrs
;
2297 std::vector
<sect_opt
>::const_iterator it
= sect_opts
.begin ();
2300 for (; it
!= sect_opts
.end (); ++it
)
2303 const char *val
= it
->value
;
2304 const char *sec
= it
->name
;
2306 if (section_addrs
.empty ())
2307 printf_unfiltered (_(" at\n"));
2308 addr
= parse_and_eval_address (val
);
2310 /* Here we store the section offsets in the order they were
2311 entered on the command line. Every array element is
2312 assigned an ascending section index to preserve the above
2313 order over an unstable sorting algorithm. This dummy
2314 index is not used for any other purpose.
2316 section_addrs
.emplace_back (addr
, sec
, section_addrs
.size ());
2317 printf_filtered ("\t%s_addr = %s\n", sec
,
2318 paddress (gdbarch
, addr
));
2320 /* The object's sections are initialized when a
2321 call is made to build_objfile_section_table (objfile).
2322 This happens in reread_symbols.
2323 At this point, we don't know what file type this is,
2324 so we can't determine what section names are valid. */
2327 printf_unfiltered (_("%s offset by %s\n"),
2328 (section_addrs
.empty ()
2329 ? _(" with all sections")
2330 : _("with other sections")),
2331 paddress (gdbarch
, offset
));
2332 else if (section_addrs
.empty ())
2333 printf_unfiltered ("\n");
2335 if (from_tty
&& (!query ("%s", "")))
2336 error (_("Not confirmed."));
2338 objf
= symbol_file_add (filename
.get (), add_flags
, §ion_addrs
,
2340 if (!objfile_has_symbols (objf
) && objf
->per_bfd
->minimal_symbol_count
<= 0)
2341 warning (_("newly-added symbol file \"%s\" does not provide any symbols"),
2345 set_objfile_default_section_offset (objf
, section_addrs
, offset
);
2347 add_target_sections_of_objfile (objf
);
2349 /* Getting new symbols may change our opinion about what is
2351 reinit_frame_cache ();
2355 /* This function removes a symbol file that was added via add-symbol-file. */
2358 remove_symbol_file_command (const char *args
, int from_tty
)
2360 struct objfile
*objf
= NULL
;
2361 struct program_space
*pspace
= current_program_space
;
2366 error (_("remove-symbol-file: no symbol file provided"));
2368 gdb_argv
argv (args
);
2370 if (strcmp (argv
[0], "-a") == 0)
2372 /* Interpret the next argument as an address. */
2375 if (argv
[1] == NULL
)
2376 error (_("Missing address argument"));
2378 if (argv
[2] != NULL
)
2379 error (_("Junk after %s"), argv
[1]);
2381 addr
= parse_and_eval_address (argv
[1]);
2383 for (objfile
*objfile
: current_program_space
->objfiles ())
2385 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2386 && (objfile
->flags
& OBJF_SHARED
) != 0
2387 && objfile
->pspace
== pspace
2388 && is_addr_in_objfile (addr
, objfile
))
2395 else if (argv
[0] != NULL
)
2397 /* Interpret the current argument as a file name. */
2399 if (argv
[1] != NULL
)
2400 error (_("Junk after %s"), argv
[0]);
2402 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2404 for (objfile
*objfile
: current_program_space
->objfiles ())
2406 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2407 && (objfile
->flags
& OBJF_SHARED
) != 0
2408 && objfile
->pspace
== pspace
2409 && filename_cmp (filename
.get (), objfile_name (objfile
)) == 0)
2418 error (_("No symbol file found"));
2421 && !query (_("Remove symbol table from file \"%s\"? "),
2422 objfile_name (objf
)))
2423 error (_("Not confirmed."));
2426 clear_symtab_users (0);
2429 /* Re-read symbols if a symbol-file has changed. */
2432 reread_symbols (void)
2435 struct stat new_statbuf
;
2437 std::vector
<struct objfile
*> new_objfiles
;
2439 for (objfile
*objfile
: current_program_space
->objfiles ())
2441 if (objfile
->obfd
== NULL
)
2444 /* Separate debug objfiles are handled in the main objfile. */
2445 if (objfile
->separate_debug_objfile_backlink
)
2448 /* If this object is from an archive (what you usually create with
2449 `ar', often called a `static library' on most systems, though
2450 a `shared library' on AIX is also an archive), then you should
2451 stat on the archive name, not member name. */
2452 if (objfile
->obfd
->my_archive
)
2453 res
= stat (bfd_get_filename (objfile
->obfd
->my_archive
), &new_statbuf
);
2455 res
= stat (objfile_name (objfile
), &new_statbuf
);
2458 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2459 printf_filtered (_("`%s' has disappeared; keeping its symbols.\n"),
2460 objfile_name (objfile
));
2463 new_modtime
= new_statbuf
.st_mtime
;
2464 if (new_modtime
!= objfile
->mtime
)
2466 printf_filtered (_("`%s' has changed; re-reading symbols.\n"),
2467 objfile_name (objfile
));
2469 /* There are various functions like symbol_file_add,
2470 symfile_bfd_open, syms_from_objfile, etc., which might
2471 appear to do what we want. But they have various other
2472 effects which we *don't* want. So we just do stuff
2473 ourselves. We don't worry about mapped files (for one thing,
2474 any mapped file will be out of date). */
2476 /* If we get an error, blow away this objfile (not sure if
2477 that is the correct response for things like shared
2479 objfile_up
objfile_holder (objfile
);
2481 /* We need to do this whenever any symbols go away. */
2482 clear_symtab_users_cleanup
defer_clear_users (0);
2484 if (exec_bfd
!= NULL
2485 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2486 bfd_get_filename (exec_bfd
)) == 0)
2488 /* Reload EXEC_BFD without asking anything. */
2490 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2493 /* Keep the calls order approx. the same as in free_objfile. */
2495 /* Free the separate debug objfiles. It will be
2496 automatically recreated by sym_read. */
2497 free_objfile_separate_debug (objfile
);
2499 /* Clear the stale source cache. */
2500 forget_cached_source_info ();
2502 /* Remove any references to this objfile in the global
2504 preserve_values (objfile
);
2506 /* Nuke all the state that we will re-read. Much of the following
2507 code which sets things to NULL really is necessary to tell
2508 other parts of GDB that there is nothing currently there.
2510 Try to keep the freeing order compatible with free_objfile. */
2512 if (objfile
->sf
!= NULL
)
2514 (*objfile
->sf
->sym_finish
) (objfile
);
2517 clear_objfile_data (objfile
);
2519 /* Clean up any state BFD has sitting around. */
2521 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2522 const char *obfd_filename
;
2524 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2525 /* Open the new BFD before freeing the old one, so that
2526 the filename remains live. */
2527 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
));
2528 objfile
->obfd
= temp
.release ();
2529 if (objfile
->obfd
== NULL
)
2530 error (_("Can't open %s to read symbols."), obfd_filename
);
2533 std::string original_name
= objfile
->original_name
;
2535 /* bfd_openr sets cacheable to true, which is what we want. */
2536 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2537 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2538 bfd_errmsg (bfd_get_error ()));
2540 objfile
->reset_psymtabs ();
2542 /* NB: after this call to obstack_free, objfiles_changed
2543 will need to be called (see discussion below). */
2544 obstack_free (&objfile
->objfile_obstack
, 0);
2545 objfile
->sections
= NULL
;
2546 objfile
->section_offsets
.clear ();
2547 objfile
->sect_index_bss
= -1;
2548 objfile
->sect_index_data
= -1;
2549 objfile
->sect_index_rodata
= -1;
2550 objfile
->sect_index_text
= -1;
2551 objfile
->compunit_symtabs
= NULL
;
2552 objfile
->template_symbols
= NULL
;
2553 objfile
->static_links
.reset (nullptr);
2555 /* obstack_init also initializes the obstack so it is
2556 empty. We could use obstack_specify_allocation but
2557 gdb_obstack.h specifies the alloc/dealloc functions. */
2558 obstack_init (&objfile
->objfile_obstack
);
2560 /* set_objfile_per_bfd potentially allocates the per-bfd
2561 data on the objfile's obstack (if sharing data across
2562 multiple users is not possible), so it's important to
2563 do it *after* the obstack has been initialized. */
2564 set_objfile_per_bfd (objfile
);
2566 objfile
->original_name
2567 = obstack_strdup (&objfile
->objfile_obstack
, original_name
);
2569 /* Reset the sym_fns pointer. The ELF reader can change it
2570 based on whether .gdb_index is present, and we need it to
2571 start over. PR symtab/15885 */
2572 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2574 build_objfile_section_table (objfile
);
2576 /* What the hell is sym_new_init for, anyway? The concept of
2577 distinguishing between the main file and additional files
2578 in this way seems rather dubious. */
2579 if (objfile
== symfile_objfile
)
2581 (*objfile
->sf
->sym_new_init
) (objfile
);
2584 (*objfile
->sf
->sym_init
) (objfile
);
2585 clear_complaints ();
2587 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2589 /* We are about to read new symbols and potentially also
2590 DWARF information. Some targets may want to pass addresses
2591 read from DWARF DIE's through an adjustment function before
2592 saving them, like MIPS, which may call into
2593 "find_pc_section". When called, that function will make
2594 use of per-objfile program space data.
2596 Since we discarded our section information above, we have
2597 dangling pointers in the per-objfile program space data
2598 structure. Force GDB to update the section mapping
2599 information by letting it know the objfile has changed,
2600 making the dangling pointers point to correct data
2603 objfiles_changed ();
2605 /* Recompute section offsets and section indices. */
2606 objfile
->sf
->sym_offsets (objfile
, {});
2608 read_symbols (objfile
, 0);
2610 if (!objfile_has_symbols (objfile
))
2613 printf_filtered (_("(no debugging symbols found)\n"));
2617 /* We're done reading the symbol file; finish off complaints. */
2618 clear_complaints ();
2620 /* Getting new symbols may change our opinion about what is
2623 reinit_frame_cache ();
2625 /* Discard cleanups as symbol reading was successful. */
2626 objfile_holder
.release ();
2627 defer_clear_users
.release ();
2629 /* If the mtime has changed between the time we set new_modtime
2630 and now, we *want* this to be out of date, so don't call stat
2632 objfile
->mtime
= new_modtime
;
2633 init_entry_point_info (objfile
);
2635 new_objfiles
.push_back (objfile
);
2639 if (!new_objfiles
.empty ())
2641 clear_symtab_users (0);
2643 /* clear_objfile_data for each objfile was called before freeing it and
2644 gdb::observers::new_objfile.notify (NULL) has been called by
2645 clear_symtab_users above. Notify the new files now. */
2646 for (auto iter
: new_objfiles
)
2647 gdb::observers::new_objfile
.notify (iter
);
2649 /* At least one objfile has changed, so we can consider that
2650 the executable we're debugging has changed too. */
2651 gdb::observers::executable_changed
.notify ();
2656 struct filename_language
2658 filename_language (const std::string
&ext_
, enum language lang_
)
2659 : ext (ext_
), lang (lang_
)
2666 static std::vector
<filename_language
> filename_language_table
;
2668 /* See symfile.h. */
2671 add_filename_language (const char *ext
, enum language lang
)
2673 filename_language_table
.emplace_back (ext
, lang
);
2676 static char *ext_args
;
2678 show_ext_args (struct ui_file
*file
, int from_tty
,
2679 struct cmd_list_element
*c
, const char *value
)
2681 fprintf_filtered (file
,
2682 _("Mapping between filename extension "
2683 "and source language is \"%s\".\n"),
2688 set_ext_lang_command (const char *args
,
2689 int from_tty
, struct cmd_list_element
*e
)
2691 char *cp
= ext_args
;
2694 /* First arg is filename extension, starting with '.' */
2696 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2698 /* Find end of first arg. */
2699 while (*cp
&& !isspace (*cp
))
2703 error (_("'%s': two arguments required -- "
2704 "filename extension and language"),
2707 /* Null-terminate first arg. */
2710 /* Find beginning of second arg, which should be a source language. */
2711 cp
= skip_spaces (cp
);
2714 error (_("'%s': two arguments required -- "
2715 "filename extension and language"),
2718 /* Lookup the language from among those we know. */
2719 lang
= language_enum (cp
);
2721 auto it
= filename_language_table
.begin ();
2722 /* Now lookup the filename extension: do we already know it? */
2723 for (; it
!= filename_language_table
.end (); it
++)
2725 if (it
->ext
== ext_args
)
2729 if (it
== filename_language_table
.end ())
2731 /* New file extension. */
2732 add_filename_language (ext_args
, lang
);
2736 /* Redefining a previously known filename extension. */
2739 /* query ("Really make files of type %s '%s'?", */
2740 /* ext_args, language_str (lang)); */
2747 info_ext_lang_command (const char *args
, int from_tty
)
2749 printf_filtered (_("Filename extensions and the languages they represent:"));
2750 printf_filtered ("\n\n");
2751 for (const filename_language
&entry
: filename_language_table
)
2752 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2753 language_str (entry
.lang
));
2757 deduce_language_from_filename (const char *filename
)
2761 if (filename
!= NULL
)
2762 if ((cp
= strrchr (filename
, '.')) != NULL
)
2764 for (const filename_language
&entry
: filename_language_table
)
2765 if (entry
.ext
== cp
)
2769 return language_unknown
;
2772 /* Allocate and initialize a new symbol table.
2773 CUST is from the result of allocate_compunit_symtab. */
2776 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2778 struct objfile
*objfile
= cust
->objfile
;
2779 struct symtab
*symtab
2780 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2782 symtab
->filename
= objfile
->intern (filename
);
2783 symtab
->fullname
= NULL
;
2784 symtab
->language
= deduce_language_from_filename (filename
);
2786 /* This can be very verbose with lots of headers.
2787 Only print at higher debug levels. */
2788 if (symtab_create_debug
>= 2)
2790 /* Be a bit clever with debugging messages, and don't print objfile
2791 every time, only when it changes. */
2792 static char *last_objfile_name
= NULL
;
2794 if (last_objfile_name
== NULL
2795 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2797 xfree (last_objfile_name
);
2798 last_objfile_name
= xstrdup (objfile_name (objfile
));
2799 fprintf_filtered (gdb_stdlog
,
2800 "Creating one or more symtabs for objfile %s ...\n",
2803 fprintf_filtered (gdb_stdlog
,
2804 "Created symtab %s for module %s.\n",
2805 host_address_to_string (symtab
), filename
);
2808 /* Add it to CUST's list of symtabs. */
2809 if (cust
->filetabs
== NULL
)
2811 cust
->filetabs
= symtab
;
2812 cust
->last_filetab
= symtab
;
2816 cust
->last_filetab
->next
= symtab
;
2817 cust
->last_filetab
= symtab
;
2820 /* Backlink to the containing compunit symtab. */
2821 symtab
->compunit_symtab
= cust
;
2826 /* Allocate and initialize a new compunit.
2827 NAME is the name of the main source file, if there is one, or some
2828 descriptive text if there are no source files. */
2830 struct compunit_symtab
*
2831 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2833 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2834 struct compunit_symtab
);
2835 const char *saved_name
;
2837 cu
->objfile
= objfile
;
2839 /* The name we record here is only for display/debugging purposes.
2840 Just save the basename to avoid path issues (too long for display,
2841 relative vs absolute, etc.). */
2842 saved_name
= lbasename (name
);
2843 cu
->name
= obstack_strdup (&objfile
->objfile_obstack
, saved_name
);
2845 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2847 if (symtab_create_debug
)
2849 fprintf_filtered (gdb_stdlog
,
2850 "Created compunit symtab %s for %s.\n",
2851 host_address_to_string (cu
),
2858 /* Hook CU to the objfile it comes from. */
2861 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2863 cu
->next
= cu
->objfile
->compunit_symtabs
;
2864 cu
->objfile
->compunit_symtabs
= cu
;
2868 /* Reset all data structures in gdb which may contain references to
2869 symbol table data. */
2872 clear_symtab_users (symfile_add_flags add_flags
)
2874 /* Someday, we should do better than this, by only blowing away
2875 the things that really need to be blown. */
2877 /* Clear the "current" symtab first, because it is no longer valid.
2878 breakpoint_re_set may try to access the current symtab. */
2879 clear_current_source_symtab_and_line ();
2882 clear_last_displayed_sal ();
2883 clear_pc_function_cache ();
2884 gdb::observers::new_objfile
.notify (NULL
);
2886 /* Varobj may refer to old symbols, perform a cleanup. */
2887 varobj_invalidate ();
2889 /* Now that the various caches have been cleared, we can re_set
2890 our breakpoints without risking it using stale data. */
2891 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2892 breakpoint_re_set ();
2896 The following code implements an abstraction for debugging overlay sections.
2898 The target model is as follows:
2899 1) The gnu linker will permit multiple sections to be mapped into the
2900 same VMA, each with its own unique LMA (or load address).
2901 2) It is assumed that some runtime mechanism exists for mapping the
2902 sections, one by one, from the load address into the VMA address.
2903 3) This code provides a mechanism for gdb to keep track of which
2904 sections should be considered to be mapped from the VMA to the LMA.
2905 This information is used for symbol lookup, and memory read/write.
2906 For instance, if a section has been mapped then its contents
2907 should be read from the VMA, otherwise from the LMA.
2909 Two levels of debugger support for overlays are available. One is
2910 "manual", in which the debugger relies on the user to tell it which
2911 overlays are currently mapped. This level of support is
2912 implemented entirely in the core debugger, and the information about
2913 whether a section is mapped is kept in the objfile->obj_section table.
2915 The second level of support is "automatic", and is only available if
2916 the target-specific code provides functionality to read the target's
2917 overlay mapping table, and translate its contents for the debugger
2918 (by updating the mapped state information in the obj_section tables).
2920 The interface is as follows:
2922 overlay map <name> -- tell gdb to consider this section mapped
2923 overlay unmap <name> -- tell gdb to consider this section unmapped
2924 overlay list -- list the sections that GDB thinks are mapped
2925 overlay read-target -- get the target's state of what's mapped
2926 overlay off/manual/auto -- set overlay debugging state
2927 Functional interface:
2928 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2929 section, return that section.
2930 find_pc_overlay(pc): find any overlay section that contains
2931 the pc, either in its VMA or its LMA
2932 section_is_mapped(sect): true if overlay is marked as mapped
2933 section_is_overlay(sect): true if section's VMA != LMA
2934 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2935 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2936 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2937 overlay_mapped_address(...): map an address from section's LMA to VMA
2938 overlay_unmapped_address(...): map an address from section's VMA to LMA
2939 symbol_overlayed_address(...): Return a "current" address for symbol:
2940 either in VMA or LMA depending on whether
2941 the symbol's section is currently mapped. */
2943 /* Overlay debugging state: */
2945 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2946 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2948 /* Function: section_is_overlay (SECTION)
2949 Returns true if SECTION has VMA not equal to LMA, ie.
2950 SECTION is loaded at an address different from where it will "run". */
2953 section_is_overlay (struct obj_section
*section
)
2955 if (overlay_debugging
&& section
)
2957 asection
*bfd_section
= section
->the_bfd_section
;
2959 if (bfd_section_lma (bfd_section
) != 0
2960 && bfd_section_lma (bfd_section
) != bfd_section_vma (bfd_section
))
2967 /* Function: overlay_invalidate_all (void)
2968 Invalidate the mapped state of all overlay sections (mark it as stale). */
2971 overlay_invalidate_all (void)
2973 struct obj_section
*sect
;
2975 for (objfile
*objfile
: current_program_space
->objfiles ())
2976 ALL_OBJFILE_OSECTIONS (objfile
, sect
)
2977 if (section_is_overlay (sect
))
2978 sect
->ovly_mapped
= -1;
2981 /* Function: section_is_mapped (SECTION)
2982 Returns true if section is an overlay, and is currently mapped.
2984 Access to the ovly_mapped flag is restricted to this function, so
2985 that we can do automatic update. If the global flag
2986 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2987 overlay_invalidate_all. If the mapped state of the particular
2988 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2991 section_is_mapped (struct obj_section
*osect
)
2993 struct gdbarch
*gdbarch
;
2995 if (osect
== 0 || !section_is_overlay (osect
))
2998 switch (overlay_debugging
)
3002 return 0; /* overlay debugging off */
3003 case ovly_auto
: /* overlay debugging automatic */
3004 /* Unles there is a gdbarch_overlay_update function,
3005 there's really nothing useful to do here (can't really go auto). */
3006 gdbarch
= osect
->objfile
->arch ();
3007 if (gdbarch_overlay_update_p (gdbarch
))
3009 if (overlay_cache_invalid
)
3011 overlay_invalidate_all ();
3012 overlay_cache_invalid
= 0;
3014 if (osect
->ovly_mapped
== -1)
3015 gdbarch_overlay_update (gdbarch
, osect
);
3018 case ovly_on
: /* overlay debugging manual */
3019 return osect
->ovly_mapped
== 1;
3023 /* Function: pc_in_unmapped_range
3024 If PC falls into the lma range of SECTION, return true, else false. */
3027 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3029 if (section_is_overlay (section
))
3031 asection
*bfd_section
= section
->the_bfd_section
;
3033 /* We assume the LMA is relocated by the same offset as the VMA. */
3034 bfd_vma size
= bfd_section_size (bfd_section
);
3035 CORE_ADDR offset
= obj_section_offset (section
);
3037 if (bfd_section_lma (bfd_section
) + offset
<= pc
3038 && pc
< bfd_section_lma (bfd_section
) + offset
+ size
)
3045 /* Function: pc_in_mapped_range
3046 If PC falls into the vma range of SECTION, return true, else false. */
3049 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3051 if (section_is_overlay (section
))
3053 if (obj_section_addr (section
) <= pc
3054 && pc
< obj_section_endaddr (section
))
3061 /* Return true if the mapped ranges of sections A and B overlap, false
3065 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3067 CORE_ADDR a_start
= obj_section_addr (a
);
3068 CORE_ADDR a_end
= obj_section_endaddr (a
);
3069 CORE_ADDR b_start
= obj_section_addr (b
);
3070 CORE_ADDR b_end
= obj_section_endaddr (b
);
3072 return (a_start
< b_end
&& b_start
< a_end
);
3075 /* Function: overlay_unmapped_address (PC, SECTION)
3076 Returns the address corresponding to PC in the unmapped (load) range.
3077 May be the same as PC. */
3080 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3082 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3084 asection
*bfd_section
= section
->the_bfd_section
;
3086 return (pc
+ bfd_section_lma (bfd_section
)
3087 - bfd_section_vma (bfd_section
));
3093 /* Function: overlay_mapped_address (PC, SECTION)
3094 Returns the address corresponding to PC in the mapped (runtime) range.
3095 May be the same as PC. */
3098 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3100 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3102 asection
*bfd_section
= section
->the_bfd_section
;
3104 return (pc
+ bfd_section_vma (bfd_section
)
3105 - bfd_section_lma (bfd_section
));
3111 /* Function: symbol_overlayed_address
3112 Return one of two addresses (relative to the VMA or to the LMA),
3113 depending on whether the section is mapped or not. */
3116 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3118 if (overlay_debugging
)
3120 /* If the symbol has no section, just return its regular address. */
3123 /* If the symbol's section is not an overlay, just return its
3125 if (!section_is_overlay (section
))
3127 /* If the symbol's section is mapped, just return its address. */
3128 if (section_is_mapped (section
))
3131 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3132 * then return its LOADED address rather than its vma address!!
3134 return overlay_unmapped_address (address
, section
);
3139 /* Function: find_pc_overlay (PC)
3140 Return the best-match overlay section for PC:
3141 If PC matches a mapped overlay section's VMA, return that section.
3142 Else if PC matches an unmapped section's VMA, return that section.
3143 Else if PC matches an unmapped section's LMA, return that section. */
3145 struct obj_section
*
3146 find_pc_overlay (CORE_ADDR pc
)
3148 struct obj_section
*osect
, *best_match
= NULL
;
3150 if (overlay_debugging
)
3152 for (objfile
*objfile
: current_program_space
->objfiles ())
3153 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3154 if (section_is_overlay (osect
))
3156 if (pc_in_mapped_range (pc
, osect
))
3158 if (section_is_mapped (osect
))
3163 else if (pc_in_unmapped_range (pc
, osect
))
3170 /* Function: find_pc_mapped_section (PC)
3171 If PC falls into the VMA address range of an overlay section that is
3172 currently marked as MAPPED, return that section. Else return NULL. */
3174 struct obj_section
*
3175 find_pc_mapped_section (CORE_ADDR pc
)
3177 struct obj_section
*osect
;
3179 if (overlay_debugging
)
3181 for (objfile
*objfile
: current_program_space
->objfiles ())
3182 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3183 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3190 /* Function: list_overlays_command
3191 Print a list of mapped sections and their PC ranges. */
3194 list_overlays_command (const char *args
, int from_tty
)
3197 struct obj_section
*osect
;
3199 if (overlay_debugging
)
3201 for (objfile
*objfile
: current_program_space
->objfiles ())
3202 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3203 if (section_is_mapped (osect
))
3205 struct gdbarch
*gdbarch
= objfile
->arch ();
3210 vma
= bfd_section_vma (osect
->the_bfd_section
);
3211 lma
= bfd_section_lma (osect
->the_bfd_section
);
3212 size
= bfd_section_size (osect
->the_bfd_section
);
3213 name
= bfd_section_name (osect
->the_bfd_section
);
3215 printf_filtered ("Section %s, loaded at ", name
);
3216 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3217 puts_filtered (" - ");
3218 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3219 printf_filtered (", mapped at ");
3220 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3221 puts_filtered (" - ");
3222 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3223 puts_filtered ("\n");
3229 printf_filtered (_("No sections are mapped.\n"));
3232 /* Function: map_overlay_command
3233 Mark the named section as mapped (ie. residing at its VMA address). */
3236 map_overlay_command (const char *args
, int from_tty
)
3238 struct obj_section
*sec
, *sec2
;
3240 if (!overlay_debugging
)
3241 error (_("Overlay debugging not enabled. Use "
3242 "either the 'overlay auto' or\n"
3243 "the 'overlay manual' command."));
3245 if (args
== 0 || *args
== 0)
3246 error (_("Argument required: name of an overlay section"));
3248 /* First, find a section matching the user supplied argument. */
3249 for (objfile
*obj_file
: current_program_space
->objfiles ())
3250 ALL_OBJFILE_OSECTIONS (obj_file
, sec
)
3251 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3253 /* Now, check to see if the section is an overlay. */
3254 if (!section_is_overlay (sec
))
3255 continue; /* not an overlay section */
3257 /* Mark the overlay as "mapped". */
3258 sec
->ovly_mapped
= 1;
3260 /* Next, make a pass and unmap any sections that are
3261 overlapped by this new section: */
3262 for (objfile
*objfile2
: current_program_space
->objfiles ())
3263 ALL_OBJFILE_OSECTIONS (objfile2
, sec2
)
3264 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
,
3268 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3269 bfd_section_name (sec2
->the_bfd_section
));
3270 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3274 error (_("No overlay section called %s"), args
);
3277 /* Function: unmap_overlay_command
3278 Mark the overlay section as unmapped
3279 (ie. resident in its LMA address range, rather than the VMA range). */
3282 unmap_overlay_command (const char *args
, int from_tty
)
3284 struct obj_section
*sec
= NULL
;
3286 if (!overlay_debugging
)
3287 error (_("Overlay debugging not enabled. "
3288 "Use either the 'overlay auto' or\n"
3289 "the 'overlay manual' command."));
3291 if (args
== 0 || *args
== 0)
3292 error (_("Argument required: name of an overlay section"));
3294 /* First, find a section matching the user supplied argument. */
3295 for (objfile
*objfile
: current_program_space
->objfiles ())
3296 ALL_OBJFILE_OSECTIONS (objfile
, sec
)
3297 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3299 if (!sec
->ovly_mapped
)
3300 error (_("Section %s is not mapped"), args
);
3301 sec
->ovly_mapped
= 0;
3304 error (_("No overlay section called %s"), args
);
3307 /* Function: overlay_auto_command
3308 A utility command to turn on overlay debugging.
3309 Possibly this should be done via a set/show command. */
3312 overlay_auto_command (const char *args
, int from_tty
)
3314 overlay_debugging
= ovly_auto
;
3315 enable_overlay_breakpoints ();
3317 printf_unfiltered (_("Automatic overlay debugging enabled."));
3320 /* Function: overlay_manual_command
3321 A utility command to turn on overlay debugging.
3322 Possibly this should be done via a set/show command. */
3325 overlay_manual_command (const char *args
, int from_tty
)
3327 overlay_debugging
= ovly_on
;
3328 disable_overlay_breakpoints ();
3330 printf_unfiltered (_("Overlay debugging enabled."));
3333 /* Function: overlay_off_command
3334 A utility command to turn on overlay debugging.
3335 Possibly this should be done via a set/show command. */
3338 overlay_off_command (const char *args
, int from_tty
)
3340 overlay_debugging
= ovly_off
;
3341 disable_overlay_breakpoints ();
3343 printf_unfiltered (_("Overlay debugging disabled."));
3347 overlay_load_command (const char *args
, int from_tty
)
3349 struct gdbarch
*gdbarch
= get_current_arch ();
3351 if (gdbarch_overlay_update_p (gdbarch
))
3352 gdbarch_overlay_update (gdbarch
, NULL
);
3354 error (_("This target does not know how to read its overlay state."));
3357 /* Command list chain containing all defined "overlay" subcommands. */
3358 static struct cmd_list_element
*overlaylist
;
3360 /* Target Overlays for the "Simplest" overlay manager:
3362 This is GDB's default target overlay layer. It works with the
3363 minimal overlay manager supplied as an example by Cygnus. The
3364 entry point is via a function pointer "gdbarch_overlay_update",
3365 so targets that use a different runtime overlay manager can
3366 substitute their own overlay_update function and take over the
3369 The overlay_update function pokes around in the target's data structures
3370 to see what overlays are mapped, and updates GDB's overlay mapping with
3373 In this simple implementation, the target data structures are as follows:
3374 unsigned _novlys; /# number of overlay sections #/
3375 unsigned _ovly_table[_novlys][4] = {
3376 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3377 {..., ..., ..., ...},
3379 unsigned _novly_regions; /# number of overlay regions #/
3380 unsigned _ovly_region_table[_novly_regions][3] = {
3381 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3384 These functions will attempt to update GDB's mappedness state in the
3385 symbol section table, based on the target's mappedness state.
3387 To do this, we keep a cached copy of the target's _ovly_table, and
3388 attempt to detect when the cached copy is invalidated. The main
3389 entry point is "simple_overlay_update(SECT), which looks up SECT in
3390 the cached table and re-reads only the entry for that section from
3391 the target (whenever possible). */
3393 /* Cached, dynamically allocated copies of the target data structures: */
3394 static unsigned (*cache_ovly_table
)[4] = 0;
3395 static unsigned cache_novlys
= 0;
3396 static CORE_ADDR cache_ovly_table_base
= 0;
3399 VMA
, OSIZE
, LMA
, MAPPED
3402 /* Throw away the cached copy of _ovly_table. */
3405 simple_free_overlay_table (void)
3407 xfree (cache_ovly_table
);
3409 cache_ovly_table
= NULL
;
3410 cache_ovly_table_base
= 0;
3413 /* Read an array of ints of size SIZE from the target into a local buffer.
3414 Convert to host order. int LEN is number of ints. */
3417 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3418 int len
, int size
, enum bfd_endian byte_order
)
3420 /* FIXME (alloca): Not safe if array is very large. */
3421 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3424 read_memory (memaddr
, buf
, len
* size
);
3425 for (i
= 0; i
< len
; i
++)
3426 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3429 /* Find and grab a copy of the target _ovly_table
3430 (and _novlys, which is needed for the table's size). */
3433 simple_read_overlay_table (void)
3435 struct bound_minimal_symbol novlys_msym
;
3436 struct bound_minimal_symbol ovly_table_msym
;
3437 struct gdbarch
*gdbarch
;
3439 enum bfd_endian byte_order
;
3441 simple_free_overlay_table ();
3442 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3443 if (! novlys_msym
.minsym
)
3445 error (_("Error reading inferior's overlay table: "
3446 "couldn't find `_novlys' variable\n"
3447 "in inferior. Use `overlay manual' mode."));
3451 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3452 if (! ovly_table_msym
.minsym
)
3454 error (_("Error reading inferior's overlay table: couldn't find "
3455 "`_ovly_table' array\n"
3456 "in inferior. Use `overlay manual' mode."));
3460 gdbarch
= ovly_table_msym
.objfile
->arch ();
3461 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3462 byte_order
= gdbarch_byte_order (gdbarch
);
3464 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3467 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3468 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3469 read_target_long_array (cache_ovly_table_base
,
3470 (unsigned int *) cache_ovly_table
,
3471 cache_novlys
* 4, word_size
, byte_order
);
3473 return 1; /* SUCCESS */
3476 /* Function: simple_overlay_update_1
3477 A helper function for simple_overlay_update. Assuming a cached copy
3478 of _ovly_table exists, look through it to find an entry whose vma,
3479 lma and size match those of OSECT. Re-read the entry and make sure
3480 it still matches OSECT (else the table may no longer be valid).
3481 Set OSECT's mapped state to match the entry. Return: 1 for
3482 success, 0 for failure. */
3485 simple_overlay_update_1 (struct obj_section
*osect
)
3488 asection
*bsect
= osect
->the_bfd_section
;
3489 struct gdbarch
*gdbarch
= osect
->objfile
->arch ();
3490 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3491 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3493 for (i
= 0; i
< cache_novlys
; i
++)
3494 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3495 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3497 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3498 (unsigned int *) cache_ovly_table
[i
],
3499 4, word_size
, byte_order
);
3500 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3501 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3503 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3506 else /* Warning! Warning! Target's ovly table has changed! */
3512 /* Function: simple_overlay_update
3513 If OSECT is NULL, then update all sections' mapped state
3514 (after re-reading the entire target _ovly_table).
3515 If OSECT is non-NULL, then try to find a matching entry in the
3516 cached ovly_table and update only OSECT's mapped state.
3517 If a cached entry can't be found or the cache isn't valid, then
3518 re-read the entire cache, and go ahead and update all sections. */
3521 simple_overlay_update (struct obj_section
*osect
)
3523 /* Were we given an osect to look up? NULL means do all of them. */
3525 /* Have we got a cached copy of the target's overlay table? */
3526 if (cache_ovly_table
!= NULL
)
3528 /* Does its cached location match what's currently in the
3530 struct bound_minimal_symbol minsym
3531 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3533 if (minsym
.minsym
== NULL
)
3534 error (_("Error reading inferior's overlay table: couldn't "
3535 "find `_ovly_table' array\n"
3536 "in inferior. Use `overlay manual' mode."));
3538 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3539 /* Then go ahead and try to look up this single section in
3541 if (simple_overlay_update_1 (osect
))
3542 /* Found it! We're done. */
3546 /* Cached table no good: need to read the entire table anew.
3547 Or else we want all the sections, in which case it's actually
3548 more efficient to read the whole table in one block anyway. */
3550 if (! simple_read_overlay_table ())
3553 /* Now may as well update all sections, even if only one was requested. */
3554 for (objfile
*objfile
: current_program_space
->objfiles ())
3555 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3556 if (section_is_overlay (osect
))
3559 asection
*bsect
= osect
->the_bfd_section
;
3561 for (i
= 0; i
< cache_novlys
; i
++)
3562 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3563 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3564 { /* obj_section matches i'th entry in ovly_table. */
3565 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3566 break; /* finished with inner for loop: break out. */
3571 /* Set the output sections and output offsets for section SECTP in
3572 ABFD. The relocation code in BFD will read these offsets, so we
3573 need to be sure they're initialized. We map each section to itself,
3574 with no offset; this means that SECTP->vma will be honored. */
3577 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3579 sectp
->output_section
= sectp
;
3580 sectp
->output_offset
= 0;
3583 /* Default implementation for sym_relocate. */
3586 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3589 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3591 bfd
*abfd
= sectp
->owner
;
3593 /* We're only interested in sections with relocation
3595 if ((sectp
->flags
& SEC_RELOC
) == 0)
3598 /* We will handle section offsets properly elsewhere, so relocate as if
3599 all sections begin at 0. */
3600 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3602 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3605 /* Relocate the contents of a debug section SECTP in ABFD. The
3606 contents are stored in BUF if it is non-NULL, or returned in a
3607 malloc'd buffer otherwise.
3609 For some platforms and debug info formats, shared libraries contain
3610 relocations against the debug sections (particularly for DWARF-2;
3611 one affected platform is PowerPC GNU/Linux, although it depends on
3612 the version of the linker in use). Also, ELF object files naturally
3613 have unresolved relocations for their debug sections. We need to apply
3614 the relocations in order to get the locations of symbols correct.
3615 Another example that may require relocation processing, is the
3616 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3620 symfile_relocate_debug_section (struct objfile
*objfile
,
3621 asection
*sectp
, bfd_byte
*buf
)
3623 gdb_assert (objfile
->sf
->sym_relocate
);
3625 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3628 symfile_segment_data_up
3629 get_symfile_segment_data (bfd
*abfd
)
3631 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3636 return sf
->sym_segments (abfd
);
3640 - DATA, containing segment addresses from the object file ABFD, and
3641 the mapping from ABFD's sections onto the segments that own them,
3643 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3644 segment addresses reported by the target,
3645 store the appropriate offsets for each section in OFFSETS.
3647 If there are fewer entries in SEGMENT_BASES than there are segments
3648 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3650 If there are more entries, then ignore the extra. The target may
3651 not be able to distinguish between an empty data segment and a
3652 missing data segment; a missing text segment is less plausible. */
3655 symfile_map_offsets_to_segments (bfd
*abfd
,
3656 const struct symfile_segment_data
*data
,
3657 section_offsets
&offsets
,
3658 int num_segment_bases
,
3659 const CORE_ADDR
*segment_bases
)
3664 /* It doesn't make sense to call this function unless you have some
3665 segment base addresses. */
3666 gdb_assert (num_segment_bases
> 0);
3668 /* If we do not have segment mappings for the object file, we
3669 can not relocate it by segments. */
3670 gdb_assert (data
!= NULL
);
3671 gdb_assert (data
->segments
.size () > 0);
3673 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3675 int which
= data
->segment_info
[i
];
3677 gdb_assert (0 <= which
&& which
<= data
->segments
.size ());
3679 /* Don't bother computing offsets for sections that aren't
3680 loaded as part of any segment. */
3684 /* Use the last SEGMENT_BASES entry as the address of any extra
3685 segments mentioned in DATA->segment_info. */
3686 if (which
> num_segment_bases
)
3687 which
= num_segment_bases
;
3689 offsets
[i
] = segment_bases
[which
- 1] - data
->segments
[which
- 1].base
;
3696 symfile_find_segment_sections (struct objfile
*objfile
)
3698 bfd
*abfd
= objfile
->obfd
;
3702 symfile_segment_data_up data
3703 = get_symfile_segment_data (objfile
->obfd
);
3707 if (data
->segments
.size () != 1 && data
->segments
.size () != 2)
3710 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3712 int which
= data
->segment_info
[i
];
3716 if (objfile
->sect_index_text
== -1)
3717 objfile
->sect_index_text
= sect
->index
;
3719 if (objfile
->sect_index_rodata
== -1)
3720 objfile
->sect_index_rodata
= sect
->index
;
3722 else if (which
== 2)
3724 if (objfile
->sect_index_data
== -1)
3725 objfile
->sect_index_data
= sect
->index
;
3727 if (objfile
->sect_index_bss
== -1)
3728 objfile
->sect_index_bss
= sect
->index
;
3733 /* Listen for free_objfile events. */
3736 symfile_free_objfile (struct objfile
*objfile
)
3738 /* Remove the target sections owned by this objfile. */
3739 if (objfile
!= NULL
)
3740 remove_target_sections ((void *) objfile
);
3743 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3744 Expand all symtabs that match the specified criteria.
3745 See quick_symbol_functions.expand_symtabs_matching for details. */
3748 expand_symtabs_matching
3749 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3750 const lookup_name_info
&lookup_name
,
3751 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3752 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3753 enum search_domain kind
)
3755 for (objfile
*objfile
: current_program_space
->objfiles ())
3758 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3761 expansion_notify
, kind
);
3765 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3766 Map function FUN over every file.
3767 See quick_symbol_functions.map_symbol_filenames for details. */
3770 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3773 for (objfile
*objfile
: current_program_space
->objfiles ())
3776 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3783 namespace selftests
{
3784 namespace filename_language
{
3786 static void test_filename_language ()
3788 /* This test messes up the filename_language_table global. */
3789 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3791 /* Test deducing an unknown extension. */
3792 language lang
= deduce_language_from_filename ("myfile.blah");
3793 SELF_CHECK (lang
== language_unknown
);
3795 /* Test deducing a known extension. */
3796 lang
= deduce_language_from_filename ("myfile.c");
3797 SELF_CHECK (lang
== language_c
);
3799 /* Test adding a new extension using the internal API. */
3800 add_filename_language (".blah", language_pascal
);
3801 lang
= deduce_language_from_filename ("myfile.blah");
3802 SELF_CHECK (lang
== language_pascal
);
3806 test_set_ext_lang_command ()
3808 /* This test messes up the filename_language_table global. */
3809 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3811 /* Confirm that the .hello extension is not known. */
3812 language lang
= deduce_language_from_filename ("cake.hello");
3813 SELF_CHECK (lang
== language_unknown
);
3815 /* Test adding a new extension using the CLI command. */
3816 auto args_holder
= make_unique_xstrdup (".hello rust");
3817 ext_args
= args_holder
.get ();
3818 set_ext_lang_command (NULL
, 1, NULL
);
3820 lang
= deduce_language_from_filename ("cake.hello");
3821 SELF_CHECK (lang
== language_rust
);
3823 /* Test overriding an existing extension using the CLI command. */
3824 int size_before
= filename_language_table
.size ();
3825 args_holder
.reset (xstrdup (".hello pascal"));
3826 ext_args
= args_holder
.get ();
3827 set_ext_lang_command (NULL
, 1, NULL
);
3828 int size_after
= filename_language_table
.size ();
3830 lang
= deduce_language_from_filename ("cake.hello");
3831 SELF_CHECK (lang
== language_pascal
);
3832 SELF_CHECK (size_before
== size_after
);
3835 } /* namespace filename_language */
3836 } /* namespace selftests */
3838 #endif /* GDB_SELF_TEST */
3840 void _initialize_symfile ();
3842 _initialize_symfile ()
3844 struct cmd_list_element
*c
;
3846 gdb::observers::free_objfile
.attach (symfile_free_objfile
);
3848 #define READNOW_READNEVER_HELP \
3849 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3850 immediately. This makes the command slower, but may make future operations\n\
3852 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3853 symbolic debug information."
3855 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3856 Load symbol table from executable file FILE.\n\
3857 Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
3858 OFF is an optional offset which is added to each section address.\n\
3859 The `file' command can also load symbol tables, as well as setting the file\n\
3860 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3861 set_cmd_completer (c
, filename_completer
);
3863 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3864 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3865 Usage: add-symbol-file FILE [-readnow | -readnever] [-o OFF] [ADDR] \
3866 [-s SECT-NAME SECT-ADDR]...\n\
3867 ADDR is the starting address of the file's text.\n\
3868 Each '-s' argument provides a section name and address, and\n\
3869 should be specified if the data and bss segments are not contiguous\n\
3870 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n\
3871 OFF is an optional offset which is added to the default load addresses\n\
3872 of all sections for which no other address was specified.\n"
3873 READNOW_READNEVER_HELP
),
3875 set_cmd_completer (c
, filename_completer
);
3877 c
= add_cmd ("remove-symbol-file", class_files
,
3878 remove_symbol_file_command
, _("\
3879 Remove a symbol file added via the add-symbol-file command.\n\
3880 Usage: remove-symbol-file FILENAME\n\
3881 remove-symbol-file -a ADDRESS\n\
3882 The file to remove can be identified by its filename or by an address\n\
3883 that lies within the boundaries of this symbol file in memory."),
3886 c
= add_cmd ("load", class_files
, load_command
, _("\
3887 Dynamically load FILE into the running program.\n\
3888 FILE symbols are recorded for access from GDB.\n\
3889 Usage: load [FILE] [OFFSET]\n\
3890 An optional load OFFSET may also be given as a literal address.\n\
3891 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3892 on its own."), &cmdlist
);
3893 set_cmd_completer (c
, filename_completer
);
3895 add_basic_prefix_cmd ("overlay", class_support
,
3896 _("Commands for debugging overlays."), &overlaylist
,
3897 "overlay ", 0, &cmdlist
);
3899 add_com_alias ("ovly", "overlay", class_support
, 1);
3900 add_com_alias ("ov", "overlay", class_support
, 1);
3902 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3903 _("Assert that an overlay section is mapped."), &overlaylist
);
3905 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3906 _("Assert that an overlay section is unmapped."), &overlaylist
);
3908 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3909 _("List mappings of overlay sections."), &overlaylist
);
3911 add_cmd ("manual", class_support
, overlay_manual_command
,
3912 _("Enable overlay debugging."), &overlaylist
);
3913 add_cmd ("off", class_support
, overlay_off_command
,
3914 _("Disable overlay debugging."), &overlaylist
);
3915 add_cmd ("auto", class_support
, overlay_auto_command
,
3916 _("Enable automatic overlay debugging."), &overlaylist
);
3917 add_cmd ("load-target", class_support
, overlay_load_command
,
3918 _("Read the overlay mapping state from the target."), &overlaylist
);
3920 /* Filename extension to source language lookup table: */
3921 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3923 Set mapping between filename extension and source language."), _("\
3924 Show mapping between filename extension and source language."), _("\
3925 Usage: set extension-language .foo bar"),
3926 set_ext_lang_command
,
3928 &setlist
, &showlist
);
3930 add_info ("extensions", info_ext_lang_command
,
3931 _("All filename extensions associated with a source language."));
3933 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3934 &debug_file_directory
, _("\
3935 Set the directories where separate debug symbols are searched for."), _("\
3936 Show the directories where separate debug symbols are searched for."), _("\
3937 Separate debug symbols are first searched for in the same\n\
3938 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3939 and lastly at the path of the directory of the binary with\n\
3940 each global debug-file-directory component prepended."),
3942 show_debug_file_directory
,
3943 &setlist
, &showlist
);
3945 add_setshow_enum_cmd ("symbol-loading", no_class
,
3946 print_symbol_loading_enums
, &print_symbol_loading
,
3948 Set printing of symbol loading messages."), _("\
3949 Show printing of symbol loading messages."), _("\
3950 off == turn all messages off\n\
3951 brief == print messages for the executable,\n\
3952 and brief messages for shared libraries\n\
3953 full == print messages for the executable,\n\
3954 and messages for each shared library."),
3957 &setprintlist
, &showprintlist
);
3959 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3960 &separate_debug_file_debug
, _("\
3961 Set printing of separate debug info file search debug."), _("\
3962 Show printing of separate debug info file search debug."), _("\
3963 When on, GDB prints the searched locations while looking for separate debug \
3964 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
3967 selftests::register_test
3968 ("filename_language", selftests::filename_language::test_filename_language
);
3969 selftests::register_test
3970 ("set_ext_lang_command",
3971 selftests::filename_language::test_set_ext_lang_command
);