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 always_confirm
= add_flags
& SYMFILE_ALWAYS_CONFIRM
;
1055 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1056 && (readnow_symbol_files
1057 || (add_flags
& SYMFILE_NO_READ
) == 0));
1059 if (readnow_symbol_files
)
1061 flags
|= OBJF_READNOW
;
1062 add_flags
&= ~SYMFILE_NO_READ
;
1064 else if (readnever_symbol_files
1065 || (parent
!= NULL
&& (parent
->flags
& OBJF_READNEVER
)))
1067 flags
|= OBJF_READNEVER
;
1068 add_flags
|= SYMFILE_NO_READ
;
1070 if ((add_flags
& SYMFILE_NOT_FILENAME
) != 0)
1071 flags
|= OBJF_NOT_FILENAME
;
1073 /* Give user a chance to burp if ALWAYS_CONFIRM or we'd be
1074 interactively wiping out any existing symbols. */
1078 || ((have_full_symbols () || have_partial_symbols ())
1080 && !query (_("Load new symbol table from \"%s\"? "), name
))
1081 error (_("Not confirmed."));
1084 flags
|= OBJF_MAINLINE
;
1085 objfile
= objfile::make (abfd
, name
, flags
, parent
);
1087 /* We either created a new mapped symbol table, mapped an existing
1088 symbol table file which has not had initial symbol reading
1089 performed, or need to read an unmapped symbol table. */
1092 if (deprecated_pre_add_symbol_hook
)
1093 deprecated_pre_add_symbol_hook (name
);
1095 printf_filtered (_("Reading symbols from %ps...\n"),
1096 styled_string (file_name_style
.style (), name
));
1098 syms_from_objfile (objfile
, addrs
, add_flags
);
1100 /* We now have at least a partial symbol table. Check to see if the
1101 user requested that all symbols be read on initial access via either
1102 the gdb startup command line or on a per symbol file basis. Expand
1103 all partial symbol tables for this objfile if so. */
1105 if ((flags
& OBJF_READNOW
))
1108 printf_filtered (_("Expanding full symbols from %ps...\n"),
1109 styled_string (file_name_style
.style (), name
));
1112 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1115 /* Note that we only print a message if we have no symbols and have
1116 no separate debug file. If there is a separate debug file which
1117 does not have symbols, we'll have emitted this message for that
1118 file, and so printing it twice is just redundant. */
1119 if (should_print
&& !objfile_has_symbols (objfile
)
1120 && objfile
->separate_debug_objfile
== nullptr)
1121 printf_filtered (_("(No debugging symbols found in %ps)\n"),
1122 styled_string (file_name_style
.style (), name
));
1126 if (deprecated_post_add_symbol_hook
)
1127 deprecated_post_add_symbol_hook ();
1130 /* We print some messages regardless of whether 'from_tty ||
1131 info_verbose' is true, so make sure they go out at the right
1133 gdb_flush (gdb_stdout
);
1135 if (objfile
->sf
== NULL
)
1137 gdb::observers::new_objfile
.notify (objfile
);
1138 return objfile
; /* No symbols. */
1141 finish_new_objfile (objfile
, add_flags
);
1143 gdb::observers::new_objfile
.notify (objfile
);
1145 bfd_cache_close_all ();
1149 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1150 see the objfile constructor. */
1153 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1154 symfile_add_flags symfile_flags
,
1155 struct objfile
*objfile
)
1157 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1158 because sections of BFD may not match sections of OBJFILE and because
1159 vma may have been modified by tools such as prelink. */
1160 section_addr_info sap
= build_section_addr_info_from_objfile (objfile
);
1162 symbol_file_add_with_addrs
1163 (bfd
, name
, symfile_flags
, &sap
,
1164 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1165 | OBJF_USERLOADED
| OBJF_MAINLINE
),
1169 /* Process the symbol file ABFD, as either the main file or as a
1170 dynamically loaded file.
1171 See symbol_file_add_with_addrs's comments for details. */
1174 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1175 symfile_add_flags add_flags
,
1176 section_addr_info
*addrs
,
1177 objfile_flags flags
, struct objfile
*parent
)
1179 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1183 /* Process a symbol file, as either the main file or as a dynamically
1184 loaded file. See symbol_file_add_with_addrs's comments for details. */
1187 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1188 section_addr_info
*addrs
, objfile_flags flags
)
1190 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1192 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1196 /* Call symbol_file_add() with default values and update whatever is
1197 affected by the loading of a new main().
1198 Used when the file is supplied in the gdb command line
1199 and by some targets with special loading requirements.
1200 The auxiliary function, symbol_file_add_main_1(), has the flags
1201 argument for the switches that can only be specified in the symbol_file
1205 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1207 symbol_file_add_main_1 (args
, add_flags
, 0, 0);
1211 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1212 objfile_flags flags
, CORE_ADDR reloff
)
1214 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1216 struct objfile
*objfile
= symbol_file_add (args
, add_flags
, NULL
, flags
);
1218 objfile_rebase (objfile
, reloff
);
1220 /* Getting new symbols may change our opinion about
1221 what is frameless. */
1222 reinit_frame_cache ();
1224 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1225 set_initial_language ();
1229 symbol_file_clear (int from_tty
)
1231 if ((have_full_symbols () || have_partial_symbols ())
1234 ? !query (_("Discard symbol table from `%s'? "),
1235 objfile_name (symfile_objfile
))
1236 : !query (_("Discard symbol table? "))))
1237 error (_("Not confirmed."));
1239 /* solib descriptors may have handles to objfiles. Wipe them before their
1240 objfiles get stale by free_all_objfiles. */
1241 no_shared_libraries (NULL
, from_tty
);
1243 current_program_space
->free_all_objfiles ();
1245 clear_symtab_users (0);
1247 gdb_assert (symfile_objfile
== NULL
);
1249 printf_filtered (_("No symbol file now.\n"));
1252 /* See symfile.h. */
1254 bool separate_debug_file_debug
= false;
1257 separate_debug_file_exists (const std::string
&name
, unsigned long crc
,
1258 struct objfile
*parent_objfile
)
1260 unsigned long file_crc
;
1262 struct stat parent_stat
, abfd_stat
;
1263 int verified_as_different
;
1265 /* Find a separate debug info file as if symbols would be present in
1266 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1267 section can contain just the basename of PARENT_OBJFILE without any
1268 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1269 the separate debug infos with the same basename can exist. */
1271 if (filename_cmp (name
.c_str (), objfile_name (parent_objfile
)) == 0)
1274 if (separate_debug_file_debug
)
1276 printf_filtered (_(" Trying %s..."), name
.c_str ());
1277 gdb_flush (gdb_stdout
);
1280 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
.c_str (), gnutarget
));
1284 if (separate_debug_file_debug
)
1285 printf_filtered (_(" no, unable to open.\n"));
1290 /* Verify symlinks were not the cause of filename_cmp name difference above.
1292 Some operating systems, e.g. Windows, do not provide a meaningful
1293 st_ino; they always set it to zero. (Windows does provide a
1294 meaningful st_dev.) Files accessed from gdbservers that do not
1295 support the vFile:fstat packet will also have st_ino set to zero.
1296 Do not indicate a duplicate library in either case. While there
1297 is no guarantee that a system that provides meaningful inode
1298 numbers will never set st_ino to zero, this is merely an
1299 optimization, so we do not need to worry about false negatives. */
1301 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1302 && abfd_stat
.st_ino
!= 0
1303 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1305 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1306 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1308 if (separate_debug_file_debug
)
1309 printf_filtered (_(" no, same file as the objfile.\n"));
1313 verified_as_different
= 1;
1316 verified_as_different
= 0;
1318 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1322 if (separate_debug_file_debug
)
1323 printf_filtered (_(" no, error computing CRC.\n"));
1328 if (crc
!= file_crc
)
1330 unsigned long parent_crc
;
1332 /* If the files could not be verified as different with
1333 bfd_stat then we need to calculate the parent's CRC
1334 to verify whether the files are different or not. */
1336 if (!verified_as_different
)
1338 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1340 if (separate_debug_file_debug
)
1341 printf_filtered (_(" no, error computing CRC.\n"));
1347 if (verified_as_different
|| parent_crc
!= file_crc
)
1348 warning (_("the debug information found in \"%s\""
1349 " does not match \"%s\" (CRC mismatch).\n"),
1350 name
.c_str (), objfile_name (parent_objfile
));
1352 if (separate_debug_file_debug
)
1353 printf_filtered (_(" no, CRC doesn't match.\n"));
1358 if (separate_debug_file_debug
)
1359 printf_filtered (_(" yes!\n"));
1364 char *debug_file_directory
= NULL
;
1366 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1367 struct cmd_list_element
*c
, const char *value
)
1369 fprintf_filtered (file
,
1370 _("The directory where separate debug "
1371 "symbols are searched for is \"%s\".\n"),
1375 #if ! defined (DEBUG_SUBDIRECTORY)
1376 #define DEBUG_SUBDIRECTORY ".debug"
1379 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1380 where the original file resides (may not be the same as
1381 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1382 looking for. CANON_DIR is the "realpath" form of DIR.
1383 DIR must contain a trailing '/'.
1384 Returns the path of the file with separate debug info, or an empty
1388 find_separate_debug_file (const char *dir
,
1389 const char *canon_dir
,
1390 const char *debuglink
,
1391 unsigned long crc32
, struct objfile
*objfile
)
1393 if (separate_debug_file_debug
)
1394 printf_filtered (_("\nLooking for separate debug info (debug link) for "
1395 "%s\n"), objfile_name (objfile
));
1397 /* First try in the same directory as the original file. */
1398 std::string debugfile
= dir
;
1399 debugfile
+= debuglink
;
1401 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1404 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1406 debugfile
+= DEBUG_SUBDIRECTORY
;
1408 debugfile
+= debuglink
;
1410 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1413 /* Then try in the global debugfile directories.
1415 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1416 cause "/..." lookups. */
1418 bool target_prefix
= startswith (dir
, "target:");
1419 const char *dir_notarget
= target_prefix
? dir
+ strlen ("target:") : dir
;
1420 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
1421 = dirnames_to_char_ptr_vec (debug_file_directory
);
1422 gdb::unique_xmalloc_ptr
<char> canon_sysroot
= gdb_realpath (gdb_sysroot
);
1424 /* MS-Windows/MS-DOS don't allow colons in file names; we must
1425 convert the drive letter into a one-letter directory, so that the
1426 file name resulting from splicing below will be valid.
1428 FIXME: The below only works when GDB runs on MS-Windows/MS-DOS.
1429 There are various remote-debugging scenarios where such a
1430 transformation of the drive letter might be required when GDB runs
1431 on a Posix host, see
1433 https://sourceware.org/ml/gdb-patches/2019-04/msg00605.html
1435 If some of those scenarios need to be supported, we will need to
1436 use a different condition for HAS_DRIVE_SPEC and a different macro
1437 instead of STRIP_DRIVE_SPEC, which work on Posix systems as well. */
1439 if (HAS_DRIVE_SPEC (dir_notarget
))
1441 drive
= dir_notarget
[0];
1442 dir_notarget
= STRIP_DRIVE_SPEC (dir_notarget
);
1445 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
1447 debugfile
= target_prefix
? "target:" : "";
1448 debugfile
+= debugdir
.get ();
1451 debugfile
+= dir_notarget
;
1452 debugfile
+= debuglink
;
1454 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1457 const char *base_path
= NULL
;
1458 if (canon_dir
!= NULL
)
1460 if (canon_sysroot
.get () != NULL
)
1461 base_path
= child_path (canon_sysroot
.get (), canon_dir
);
1463 base_path
= child_path (gdb_sysroot
, canon_dir
);
1465 if (base_path
!= NULL
)
1467 /* If the file is in the sysroot, try using its base path in
1468 the global debugfile directory. */
1469 debugfile
= target_prefix
? "target:" : "";
1470 debugfile
+= debugdir
.get ();
1472 debugfile
+= base_path
;
1474 debugfile
+= debuglink
;
1476 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1479 /* If the file is in the sysroot, try using its base path in
1480 the sysroot's global debugfile directory. */
1481 debugfile
= target_prefix
? "target:" : "";
1482 debugfile
+= gdb_sysroot
;
1483 debugfile
+= debugdir
.get ();
1485 debugfile
+= base_path
;
1487 debugfile
+= debuglink
;
1489 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1495 return std::string ();
1498 /* Modify PATH to contain only "[/]directory/" part of PATH.
1499 If there were no directory separators in PATH, PATH will be empty
1500 string on return. */
1503 terminate_after_last_dir_separator (char *path
)
1507 /* Strip off the final filename part, leaving the directory name,
1508 followed by a slash. The directory can be relative or absolute. */
1509 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1510 if (IS_DIR_SEPARATOR (path
[i
]))
1513 /* If I is -1 then no directory is present there and DIR will be "". */
1517 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1518 Returns pathname, or an empty string. */
1521 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1523 unsigned long crc32
;
1525 gdb::unique_xmalloc_ptr
<char> debuglink
1526 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1528 if (debuglink
== NULL
)
1530 /* There's no separate debug info, hence there's no way we could
1531 load it => no warning. */
1532 return std::string ();
1535 std::string dir
= objfile_name (objfile
);
1536 terminate_after_last_dir_separator (&dir
[0]);
1537 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1539 std::string debugfile
1540 = find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1541 debuglink
.get (), crc32
, objfile
);
1543 if (debugfile
.empty ())
1545 /* For PR gdb/9538, try again with realpath (if different from the
1550 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1551 && S_ISLNK (st_buf
.st_mode
))
1553 gdb::unique_xmalloc_ptr
<char> symlink_dir
1554 (lrealpath (objfile_name (objfile
)));
1555 if (symlink_dir
!= NULL
)
1557 terminate_after_last_dir_separator (symlink_dir
.get ());
1558 if (dir
!= symlink_dir
.get ())
1560 /* Different directory, so try using it. */
1561 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1574 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1578 validate_readnow_readnever (objfile_flags flags
)
1580 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1581 error (_("-readnow and -readnever cannot be used simultaneously"));
1584 /* This is the symbol-file command. Read the file, analyze its
1585 symbols, and add a struct symtab to a symtab list. The syntax of
1586 the command is rather bizarre:
1588 1. The function buildargv implements various quoting conventions
1589 which are undocumented and have little or nothing in common with
1590 the way things are quoted (or not quoted) elsewhere in GDB.
1592 2. Options are used, which are not generally used in GDB (perhaps
1593 "set mapped on", "set readnow on" would be better)
1595 3. The order of options matters, which is contrary to GNU
1596 conventions (because it is confusing and inconvenient). */
1599 symbol_file_command (const char *args
, int from_tty
)
1605 symbol_file_clear (from_tty
);
1609 objfile_flags flags
= OBJF_USERLOADED
;
1610 symfile_add_flags add_flags
= 0;
1612 bool stop_processing_options
= false;
1613 CORE_ADDR offset
= 0;
1618 add_flags
|= SYMFILE_VERBOSE
;
1620 gdb_argv
built_argv (args
);
1621 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1623 if (stop_processing_options
|| *arg
!= '-')
1628 error (_("Unrecognized argument \"%s\""), arg
);
1630 else if (strcmp (arg
, "-readnow") == 0)
1631 flags
|= OBJF_READNOW
;
1632 else if (strcmp (arg
, "-readnever") == 0)
1633 flags
|= OBJF_READNEVER
;
1634 else if (strcmp (arg
, "-o") == 0)
1636 arg
= built_argv
[++idx
];
1638 error (_("Missing argument to -o"));
1640 offset
= parse_and_eval_address (arg
);
1642 else if (strcmp (arg
, "--") == 0)
1643 stop_processing_options
= true;
1645 error (_("Unrecognized argument \"%s\""), arg
);
1649 error (_("no symbol file name was specified"));
1651 validate_readnow_readnever (flags
);
1653 /* Set SYMFILE_DEFER_BP_RESET because the proper displacement for a PIE
1654 (Position Independent Executable) main symbol file will only be
1655 computed by the solib_create_inferior_hook below. Without it,
1656 breakpoint_re_set would fail to insert the breakpoints with the zero
1658 add_flags
|= SYMFILE_DEFER_BP_RESET
;
1660 symbol_file_add_main_1 (name
, add_flags
, flags
, offset
);
1662 solib_create_inferior_hook (from_tty
);
1664 /* Now it's safe to re-add the breakpoints. */
1665 breakpoint_re_set ();
1669 /* Set the initial language. */
1672 set_initial_language (void)
1674 if (language_mode
== language_mode_manual
)
1676 enum language lang
= main_language ();
1677 /* Make C the default language. */
1678 enum language default_lang
= language_c
;
1680 if (lang
== language_unknown
)
1682 const char *name
= main_name ();
1684 = lookup_symbol_in_language (name
, NULL
, VAR_DOMAIN
, default_lang
,
1688 lang
= sym
->language ();
1691 if (lang
== language_unknown
)
1693 lang
= default_lang
;
1696 set_language (lang
);
1697 expected_language
= current_language
; /* Don't warn the user. */
1700 /* Open the file specified by NAME and hand it off to BFD for
1701 preliminary analysis. Return a newly initialized bfd *, which
1702 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1703 absolute). In case of trouble, error() is called. */
1706 symfile_bfd_open (const char *name
)
1710 gdb::unique_xmalloc_ptr
<char> absolute_name
;
1711 if (!is_target_filename (name
))
1713 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1715 /* Look down path for it, allocate 2nd new malloc'd copy. */
1716 desc
= openp (getenv ("PATH"),
1717 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1718 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1719 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1722 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1724 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1725 desc
= openp (getenv ("PATH"),
1726 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1727 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1731 perror_with_name (expanded_name
.get ());
1733 name
= absolute_name
.get ();
1736 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1737 if (sym_bfd
== NULL
)
1738 error (_("`%s': can't open to read symbols: %s."), name
,
1739 bfd_errmsg (bfd_get_error ()));
1741 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1742 bfd_set_cacheable (sym_bfd
.get (), 1);
1744 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1745 error (_("`%s': can't read symbols: %s."), name
,
1746 bfd_errmsg (bfd_get_error ()));
1751 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1752 the section was not found. */
1755 get_section_index (struct objfile
*objfile
, const char *section_name
)
1757 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1765 /* Link SF into the global symtab_fns list.
1766 FLAVOUR is the file format that SF handles.
1767 Called on startup by the _initialize routine in each object file format
1768 reader, to register information about each format the reader is prepared
1772 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1774 symtab_fns
.emplace_back (flavour
, sf
);
1777 /* Initialize OBJFILE to read symbols from its associated BFD. It
1778 either returns or calls error(). The result is an initialized
1779 struct sym_fns in the objfile structure, that contains cached
1780 information about the symbol file. */
1782 static const struct sym_fns
*
1783 find_sym_fns (bfd
*abfd
)
1785 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1787 if (our_flavour
== bfd_target_srec_flavour
1788 || our_flavour
== bfd_target_ihex_flavour
1789 || our_flavour
== bfd_target_tekhex_flavour
)
1790 return NULL
; /* No symbols. */
1792 for (const registered_sym_fns
&rsf
: symtab_fns
)
1793 if (our_flavour
== rsf
.sym_flavour
)
1796 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1797 bfd_get_target (abfd
));
1801 /* This function runs the load command of our current target. */
1804 load_command (const char *arg
, int from_tty
)
1808 /* The user might be reloading because the binary has changed. Take
1809 this opportunity to check. */
1810 reopen_exec_file ();
1816 const char *parg
, *prev
;
1818 arg
= get_exec_file (1);
1820 /* We may need to quote this string so buildargv can pull it
1823 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1825 temp
.append (prev
, parg
- prev
);
1827 temp
.push_back ('\\');
1829 /* If we have not copied anything yet, then we didn't see a
1830 character to quote, and we can just leave ARG unchanged. */
1834 arg
= temp
.c_str ();
1838 target_load (arg
, from_tty
);
1840 /* After re-loading the executable, we don't really know which
1841 overlays are mapped any more. */
1842 overlay_cache_invalid
= 1;
1845 /* This version of "load" should be usable for any target. Currently
1846 it is just used for remote targets, not inftarg.c or core files,
1847 on the theory that only in that case is it useful.
1849 Avoiding xmodem and the like seems like a win (a) because we don't have
1850 to worry about finding it, and (b) On VMS, fork() is very slow and so
1851 we don't want to run a subprocess. On the other hand, I'm not sure how
1852 performance compares. */
1854 static int validate_download
= 0;
1856 /* Callback service function for generic_load (bfd_map_over_sections). */
1859 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1861 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1863 *sum
+= bfd_section_size (asec
);
1866 /* Opaque data for load_progress. */
1867 struct load_progress_data
1869 /* Cumulative data. */
1870 unsigned long write_count
= 0;
1871 unsigned long data_count
= 0;
1872 bfd_size_type total_size
= 0;
1875 /* Opaque data for load_progress for a single section. */
1876 struct load_progress_section_data
1878 load_progress_section_data (load_progress_data
*cumulative_
,
1879 const char *section_name_
, ULONGEST section_size_
,
1880 CORE_ADDR lma_
, gdb_byte
*buffer_
)
1881 : cumulative (cumulative_
), section_name (section_name_
),
1882 section_size (section_size_
), lma (lma_
), buffer (buffer_
)
1885 struct load_progress_data
*cumulative
;
1887 /* Per-section data. */
1888 const char *section_name
;
1889 ULONGEST section_sent
= 0;
1890 ULONGEST section_size
;
1895 /* Opaque data for load_section_callback. */
1896 struct load_section_data
1898 load_section_data (load_progress_data
*progress_data_
)
1899 : progress_data (progress_data_
)
1902 ~load_section_data ()
1904 for (auto &&request
: requests
)
1906 xfree (request
.data
);
1907 delete ((load_progress_section_data
*) request
.baton
);
1911 CORE_ADDR load_offset
= 0;
1912 struct load_progress_data
*progress_data
;
1913 std::vector
<struct memory_write_request
> requests
;
1916 /* Target write callback routine for progress reporting. */
1919 load_progress (ULONGEST bytes
, void *untyped_arg
)
1921 struct load_progress_section_data
*args
1922 = (struct load_progress_section_data
*) untyped_arg
;
1923 struct load_progress_data
*totals
;
1926 /* Writing padding data. No easy way to get at the cumulative
1927 stats, so just ignore this. */
1930 totals
= args
->cumulative
;
1932 if (bytes
== 0 && args
->section_sent
== 0)
1934 /* The write is just starting. Let the user know we've started
1936 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1938 hex_string (args
->section_size
),
1939 paddress (target_gdbarch (), args
->lma
));
1943 if (validate_download
)
1945 /* Broken memories and broken monitors manifest themselves here
1946 when bring new computers to life. This doubles already slow
1948 /* NOTE: cagney/1999-10-18: A more efficient implementation
1949 might add a verify_memory() method to the target vector and
1950 then use that. remote.c could implement that method using
1951 the ``qCRC'' packet. */
1952 gdb::byte_vector
check (bytes
);
1954 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1955 error (_("Download verify read failed at %s"),
1956 paddress (target_gdbarch (), args
->lma
));
1957 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1958 error (_("Download verify compare failed at %s"),
1959 paddress (target_gdbarch (), args
->lma
));
1961 totals
->data_count
+= bytes
;
1963 args
->buffer
+= bytes
;
1964 totals
->write_count
+= 1;
1965 args
->section_sent
+= bytes
;
1966 if (check_quit_flag ()
1967 || (deprecated_ui_load_progress_hook
!= NULL
1968 && deprecated_ui_load_progress_hook (args
->section_name
,
1969 args
->section_sent
)))
1970 error (_("Canceled the download"));
1972 if (deprecated_show_load_progress
!= NULL
)
1973 deprecated_show_load_progress (args
->section_name
,
1977 totals
->total_size
);
1980 /* Callback service function for generic_load (bfd_map_over_sections). */
1983 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1985 struct load_section_data
*args
= (struct load_section_data
*) data
;
1986 bfd_size_type size
= bfd_section_size (asec
);
1987 const char *sect_name
= bfd_section_name (asec
);
1989 if ((bfd_section_flags (asec
) & SEC_LOAD
) == 0)
1995 ULONGEST begin
= bfd_section_lma (asec
) + args
->load_offset
;
1996 ULONGEST end
= begin
+ size
;
1997 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (size
);
1998 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2000 load_progress_section_data
*section_data
2001 = new load_progress_section_data (args
->progress_data
, sect_name
, size
,
2004 args
->requests
.emplace_back (begin
, end
, buffer
, section_data
);
2007 static void print_transfer_performance (struct ui_file
*stream
,
2008 unsigned long data_count
,
2009 unsigned long write_count
,
2010 std::chrono::steady_clock::duration d
);
2012 /* See symfile.h. */
2015 generic_load (const char *args
, int from_tty
)
2017 struct load_progress_data total_progress
;
2018 struct load_section_data
cbdata (&total_progress
);
2019 struct ui_out
*uiout
= current_uiout
;
2022 error_no_arg (_("file to load"));
2024 gdb_argv
argv (args
);
2026 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2028 if (argv
[1] != NULL
)
2032 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2034 /* If the last word was not a valid number then
2035 treat it as a file name with spaces in. */
2036 if (argv
[1] == endptr
)
2037 error (_("Invalid download offset:%s."), argv
[1]);
2039 if (argv
[2] != NULL
)
2040 error (_("Too many parameters."));
2043 /* Open the file for loading. */
2044 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
));
2045 if (loadfile_bfd
== NULL
)
2046 perror_with_name (filename
.get ());
2048 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2050 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2051 bfd_errmsg (bfd_get_error ()));
2054 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
2055 (void *) &total_progress
.total_size
);
2057 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
2059 using namespace std::chrono
;
2061 steady_clock::time_point start_time
= steady_clock::now ();
2063 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2064 load_progress
) != 0)
2065 error (_("Load failed"));
2067 steady_clock::time_point end_time
= steady_clock::now ();
2069 CORE_ADDR entry
= bfd_get_start_address (loadfile_bfd
.get ());
2070 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2071 uiout
->text ("Start address ");
2072 uiout
->field_core_addr ("address", target_gdbarch (), entry
);
2073 uiout
->text (", load size ");
2074 uiout
->field_unsigned ("load-size", total_progress
.data_count
);
2076 regcache_write_pc (get_current_regcache (), entry
);
2078 /* Reset breakpoints, now that we have changed the load image. For
2079 instance, breakpoints may have been set (or reset, by
2080 post_create_inferior) while connected to the target but before we
2081 loaded the program. In that case, the prologue analyzer could
2082 have read instructions from the target to find the right
2083 breakpoint locations. Loading has changed the contents of that
2086 breakpoint_re_set ();
2088 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2089 total_progress
.write_count
,
2090 end_time
- start_time
);
2093 /* Report on STREAM the performance of a memory transfer operation,
2094 such as 'load'. DATA_COUNT is the number of bytes transferred.
2095 WRITE_COUNT is the number of separate write operations, or 0, if
2096 that information is not available. TIME is how long the operation
2100 print_transfer_performance (struct ui_file
*stream
,
2101 unsigned long data_count
,
2102 unsigned long write_count
,
2103 std::chrono::steady_clock::duration time
)
2105 using namespace std::chrono
;
2106 struct ui_out
*uiout
= current_uiout
;
2108 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2110 uiout
->text ("Transfer rate: ");
2111 if (ms
.count () > 0)
2113 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2115 if (uiout
->is_mi_like_p ())
2117 uiout
->field_unsigned ("transfer-rate", rate
* 8);
2118 uiout
->text (" bits/sec");
2120 else if (rate
< 1024)
2122 uiout
->field_unsigned ("transfer-rate", rate
);
2123 uiout
->text (" bytes/sec");
2127 uiout
->field_unsigned ("transfer-rate", rate
/ 1024);
2128 uiout
->text (" KB/sec");
2133 uiout
->field_unsigned ("transferred-bits", (data_count
* 8));
2134 uiout
->text (" bits in <1 sec");
2136 if (write_count
> 0)
2139 uiout
->field_unsigned ("write-rate", data_count
/ write_count
);
2140 uiout
->text (" bytes/write");
2142 uiout
->text (".\n");
2145 /* Add an OFFSET to the start address of each section in OBJF, except
2146 sections that were specified in ADDRS. */
2149 set_objfile_default_section_offset (struct objfile
*objf
,
2150 const section_addr_info
&addrs
,
2153 /* Add OFFSET to all sections by default. */
2154 section_offsets
offsets (objf
->section_offsets
.size (), offset
);
2156 /* Create sorted lists of all sections in ADDRS as well as all
2157 sections in OBJF. */
2159 std::vector
<const struct other_sections
*> addrs_sorted
2160 = addrs_section_sort (addrs
);
2162 section_addr_info objf_addrs
2163 = build_section_addr_info_from_objfile (objf
);
2164 std::vector
<const struct other_sections
*> objf_addrs_sorted
2165 = addrs_section_sort (objf_addrs
);
2167 /* Walk the BFD section list, and if a matching section is found in
2168 ADDRS_SORTED_LIST, set its offset to zero to keep its address
2171 Note that both lists may contain multiple sections with the same
2172 name, and then the sections from ADDRS are matched in BFD order
2173 (thanks to sectindex). */
2175 std::vector
<const struct other_sections
*>::iterator addrs_sorted_iter
2176 = addrs_sorted
.begin ();
2177 for (const other_sections
*objf_sect
: objf_addrs_sorted
)
2179 const char *objf_name
= addr_section_name (objf_sect
->name
.c_str ());
2182 while (cmp
< 0 && addrs_sorted_iter
!= addrs_sorted
.end ())
2184 const struct other_sections
*sect
= *addrs_sorted_iter
;
2185 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
2186 cmp
= strcmp (sect_name
, objf_name
);
2188 ++addrs_sorted_iter
;
2192 offsets
[objf_sect
->sectindex
] = 0;
2195 /* Apply the new section offsets. */
2196 objfile_relocate (objf
, offsets
);
2199 /* This function allows the addition of incrementally linked object files.
2200 It does not modify any state in the target, only in the debugger. */
2203 add_symbol_file_command (const char *args
, int from_tty
)
2205 struct gdbarch
*gdbarch
= get_current_arch ();
2206 gdb::unique_xmalloc_ptr
<char> filename
;
2209 struct objfile
*objf
;
2210 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2211 symfile_add_flags add_flags
= 0;
2214 add_flags
|= SYMFILE_VERBOSE
;
2222 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2223 bool stop_processing_options
= false;
2224 CORE_ADDR offset
= 0;
2229 error (_("add-symbol-file takes a file name and an address"));
2231 bool seen_addr
= false;
2232 bool seen_offset
= false;
2233 gdb_argv
argv (args
);
2235 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2237 if (stop_processing_options
|| *arg
!= '-')
2239 if (filename
== NULL
)
2241 /* First non-option argument is always the filename. */
2242 filename
.reset (tilde_expand (arg
));
2244 else if (!seen_addr
)
2246 /* The second non-option argument is always the text
2247 address at which to load the program. */
2248 sect_opts
[0].value
= arg
;
2252 error (_("Unrecognized argument \"%s\""), arg
);
2254 else if (strcmp (arg
, "-readnow") == 0)
2255 flags
|= OBJF_READNOW
;
2256 else if (strcmp (arg
, "-readnever") == 0)
2257 flags
|= OBJF_READNEVER
;
2258 else if (strcmp (arg
, "-s") == 0)
2260 if (argv
[argcnt
+ 1] == NULL
)
2261 error (_("Missing section name after \"-s\""));
2262 else if (argv
[argcnt
+ 2] == NULL
)
2263 error (_("Missing section address after \"-s\""));
2265 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2267 sect_opts
.push_back (sect
);
2270 else if (strcmp (arg
, "-o") == 0)
2272 arg
= argv
[++argcnt
];
2274 error (_("Missing argument to -o"));
2276 offset
= parse_and_eval_address (arg
);
2279 else if (strcmp (arg
, "--") == 0)
2280 stop_processing_options
= true;
2282 error (_("Unrecognized argument \"%s\""), arg
);
2285 if (filename
== NULL
)
2286 error (_("You must provide a filename to be loaded."));
2288 validate_readnow_readnever (flags
);
2290 /* Print the prompt for the query below. And save the arguments into
2291 a sect_addr_info structure to be passed around to other
2292 functions. We have to split this up into separate print
2293 statements because hex_string returns a local static
2296 printf_unfiltered (_("add symbol table from file \"%s\""),
2298 section_addr_info section_addrs
;
2299 std::vector
<sect_opt
>::const_iterator it
= sect_opts
.begin ();
2302 for (; it
!= sect_opts
.end (); ++it
)
2305 const char *val
= it
->value
;
2306 const char *sec
= it
->name
;
2308 if (section_addrs
.empty ())
2309 printf_unfiltered (_(" at\n"));
2310 addr
= parse_and_eval_address (val
);
2312 /* Here we store the section offsets in the order they were
2313 entered on the command line. Every array element is
2314 assigned an ascending section index to preserve the above
2315 order over an unstable sorting algorithm. This dummy
2316 index is not used for any other purpose.
2318 section_addrs
.emplace_back (addr
, sec
, section_addrs
.size ());
2319 printf_filtered ("\t%s_addr = %s\n", sec
,
2320 paddress (gdbarch
, addr
));
2322 /* The object's sections are initialized when a
2323 call is made to build_objfile_section_table (objfile).
2324 This happens in reread_symbols.
2325 At this point, we don't know what file type this is,
2326 so we can't determine what section names are valid. */
2329 printf_unfiltered (_("%s offset by %s\n"),
2330 (section_addrs
.empty ()
2331 ? _(" with all sections")
2332 : _("with other sections")),
2333 paddress (gdbarch
, offset
));
2334 else if (section_addrs
.empty ())
2335 printf_unfiltered ("\n");
2337 if (from_tty
&& (!query ("%s", "")))
2338 error (_("Not confirmed."));
2340 objf
= symbol_file_add (filename
.get (), add_flags
, §ion_addrs
,
2342 if (!objfile_has_symbols (objf
) && objf
->per_bfd
->minimal_symbol_count
<= 0)
2343 warning (_("newly-added symbol file \"%s\" does not provide any symbols"),
2347 set_objfile_default_section_offset (objf
, section_addrs
, offset
);
2349 add_target_sections_of_objfile (objf
);
2351 /* Getting new symbols may change our opinion about what is
2353 reinit_frame_cache ();
2357 /* This function removes a symbol file that was added via add-symbol-file. */
2360 remove_symbol_file_command (const char *args
, int from_tty
)
2362 struct objfile
*objf
= NULL
;
2363 struct program_space
*pspace
= current_program_space
;
2368 error (_("remove-symbol-file: no symbol file provided"));
2370 gdb_argv
argv (args
);
2372 if (strcmp (argv
[0], "-a") == 0)
2374 /* Interpret the next argument as an address. */
2377 if (argv
[1] == NULL
)
2378 error (_("Missing address argument"));
2380 if (argv
[2] != NULL
)
2381 error (_("Junk after %s"), argv
[1]);
2383 addr
= parse_and_eval_address (argv
[1]);
2385 for (objfile
*objfile
: current_program_space
->objfiles ())
2387 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2388 && (objfile
->flags
& OBJF_SHARED
) != 0
2389 && objfile
->pspace
== pspace
2390 && is_addr_in_objfile (addr
, objfile
))
2397 else if (argv
[0] != NULL
)
2399 /* Interpret the current argument as a file name. */
2401 if (argv
[1] != NULL
)
2402 error (_("Junk after %s"), argv
[0]);
2404 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2406 for (objfile
*objfile
: current_program_space
->objfiles ())
2408 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2409 && (objfile
->flags
& OBJF_SHARED
) != 0
2410 && objfile
->pspace
== pspace
2411 && filename_cmp (filename
.get (), objfile_name (objfile
)) == 0)
2420 error (_("No symbol file found"));
2423 && !query (_("Remove symbol table from file \"%s\"? "),
2424 objfile_name (objf
)))
2425 error (_("Not confirmed."));
2428 clear_symtab_users (0);
2431 /* Re-read symbols if a symbol-file has changed. */
2434 reread_symbols (void)
2437 struct stat new_statbuf
;
2439 std::vector
<struct objfile
*> new_objfiles
;
2441 for (objfile
*objfile
: current_program_space
->objfiles ())
2443 if (objfile
->obfd
== NULL
)
2446 /* Separate debug objfiles are handled in the main objfile. */
2447 if (objfile
->separate_debug_objfile_backlink
)
2450 /* If this object is from an archive (what you usually create with
2451 `ar', often called a `static library' on most systems, though
2452 a `shared library' on AIX is also an archive), then you should
2453 stat on the archive name, not member name. */
2454 if (objfile
->obfd
->my_archive
)
2455 res
= stat (bfd_get_filename (objfile
->obfd
->my_archive
), &new_statbuf
);
2457 res
= stat (objfile_name (objfile
), &new_statbuf
);
2460 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2461 printf_filtered (_("`%s' has disappeared; keeping its symbols.\n"),
2462 objfile_name (objfile
));
2465 new_modtime
= new_statbuf
.st_mtime
;
2466 if (new_modtime
!= objfile
->mtime
)
2468 printf_filtered (_("`%s' has changed; re-reading symbols.\n"),
2469 objfile_name (objfile
));
2471 /* There are various functions like symbol_file_add,
2472 symfile_bfd_open, syms_from_objfile, etc., which might
2473 appear to do what we want. But they have various other
2474 effects which we *don't* want. So we just do stuff
2475 ourselves. We don't worry about mapped files (for one thing,
2476 any mapped file will be out of date). */
2478 /* If we get an error, blow away this objfile (not sure if
2479 that is the correct response for things like shared
2481 objfile_up
objfile_holder (objfile
);
2483 /* We need to do this whenever any symbols go away. */
2484 clear_symtab_users_cleanup
defer_clear_users (0);
2486 if (exec_bfd
!= NULL
2487 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2488 bfd_get_filename (exec_bfd
)) == 0)
2490 /* Reload EXEC_BFD without asking anything. */
2492 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2495 /* Keep the calls order approx. the same as in free_objfile. */
2497 /* Free the separate debug objfiles. It will be
2498 automatically recreated by sym_read. */
2499 free_objfile_separate_debug (objfile
);
2501 /* Clear the stale source cache. */
2502 forget_cached_source_info ();
2504 /* Remove any references to this objfile in the global
2506 preserve_values (objfile
);
2508 /* Nuke all the state that we will re-read. Much of the following
2509 code which sets things to NULL really is necessary to tell
2510 other parts of GDB that there is nothing currently there.
2512 Try to keep the freeing order compatible with free_objfile. */
2514 if (objfile
->sf
!= NULL
)
2516 (*objfile
->sf
->sym_finish
) (objfile
);
2519 clear_objfile_data (objfile
);
2521 /* Clean up any state BFD has sitting around. */
2523 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2524 const char *obfd_filename
;
2526 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2527 /* Open the new BFD before freeing the old one, so that
2528 the filename remains live. */
2529 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
));
2530 objfile
->obfd
= temp
.release ();
2531 if (objfile
->obfd
== NULL
)
2532 error (_("Can't open %s to read symbols."), obfd_filename
);
2535 std::string original_name
= objfile
->original_name
;
2537 /* bfd_openr sets cacheable to true, which is what we want. */
2538 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2539 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2540 bfd_errmsg (bfd_get_error ()));
2542 objfile
->reset_psymtabs ();
2544 /* NB: after this call to obstack_free, objfiles_changed
2545 will need to be called (see discussion below). */
2546 obstack_free (&objfile
->objfile_obstack
, 0);
2547 objfile
->sections
= NULL
;
2548 objfile
->section_offsets
.clear ();
2549 objfile
->sect_index_bss
= -1;
2550 objfile
->sect_index_data
= -1;
2551 objfile
->sect_index_rodata
= -1;
2552 objfile
->sect_index_text
= -1;
2553 objfile
->compunit_symtabs
= NULL
;
2554 objfile
->template_symbols
= NULL
;
2555 objfile
->static_links
.reset (nullptr);
2557 /* obstack_init also initializes the obstack so it is
2558 empty. We could use obstack_specify_allocation but
2559 gdb_obstack.h specifies the alloc/dealloc functions. */
2560 obstack_init (&objfile
->objfile_obstack
);
2562 /* set_objfile_per_bfd potentially allocates the per-bfd
2563 data on the objfile's obstack (if sharing data across
2564 multiple users is not possible), so it's important to
2565 do it *after* the obstack has been initialized. */
2566 set_objfile_per_bfd (objfile
);
2568 objfile
->original_name
2569 = obstack_strdup (&objfile
->objfile_obstack
, original_name
);
2571 /* Reset the sym_fns pointer. The ELF reader can change it
2572 based on whether .gdb_index is present, and we need it to
2573 start over. PR symtab/15885 */
2574 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2576 build_objfile_section_table (objfile
);
2578 /* What the hell is sym_new_init for, anyway? The concept of
2579 distinguishing between the main file and additional files
2580 in this way seems rather dubious. */
2581 if (objfile
== symfile_objfile
)
2583 (*objfile
->sf
->sym_new_init
) (objfile
);
2586 (*objfile
->sf
->sym_init
) (objfile
);
2587 clear_complaints ();
2589 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2591 /* We are about to read new symbols and potentially also
2592 DWARF information. Some targets may want to pass addresses
2593 read from DWARF DIE's through an adjustment function before
2594 saving them, like MIPS, which may call into
2595 "find_pc_section". When called, that function will make
2596 use of per-objfile program space data.
2598 Since we discarded our section information above, we have
2599 dangling pointers in the per-objfile program space data
2600 structure. Force GDB to update the section mapping
2601 information by letting it know the objfile has changed,
2602 making the dangling pointers point to correct data
2605 objfiles_changed ();
2607 /* Recompute section offsets and section indices. */
2608 objfile
->sf
->sym_offsets (objfile
, {});
2610 read_symbols (objfile
, 0);
2612 if (!objfile_has_symbols (objfile
))
2615 printf_filtered (_("(no debugging symbols found)\n"));
2619 /* We're done reading the symbol file; finish off complaints. */
2620 clear_complaints ();
2622 /* Getting new symbols may change our opinion about what is
2625 reinit_frame_cache ();
2627 /* Discard cleanups as symbol reading was successful. */
2628 objfile_holder
.release ();
2629 defer_clear_users
.release ();
2631 /* If the mtime has changed between the time we set new_modtime
2632 and now, we *want* this to be out of date, so don't call stat
2634 objfile
->mtime
= new_modtime
;
2635 init_entry_point_info (objfile
);
2637 new_objfiles
.push_back (objfile
);
2641 if (!new_objfiles
.empty ())
2643 clear_symtab_users (0);
2645 /* clear_objfile_data for each objfile was called before freeing it and
2646 gdb::observers::new_objfile.notify (NULL) has been called by
2647 clear_symtab_users above. Notify the new files now. */
2648 for (auto iter
: new_objfiles
)
2649 gdb::observers::new_objfile
.notify (iter
);
2651 /* At least one objfile has changed, so we can consider that
2652 the executable we're debugging has changed too. */
2653 gdb::observers::executable_changed
.notify ();
2658 struct filename_language
2660 filename_language (const std::string
&ext_
, enum language lang_
)
2661 : ext (ext_
), lang (lang_
)
2668 static std::vector
<filename_language
> filename_language_table
;
2670 /* See symfile.h. */
2673 add_filename_language (const char *ext
, enum language lang
)
2675 filename_language_table
.emplace_back (ext
, lang
);
2678 static char *ext_args
;
2680 show_ext_args (struct ui_file
*file
, int from_tty
,
2681 struct cmd_list_element
*c
, const char *value
)
2683 fprintf_filtered (file
,
2684 _("Mapping between filename extension "
2685 "and source language is \"%s\".\n"),
2690 set_ext_lang_command (const char *args
,
2691 int from_tty
, struct cmd_list_element
*e
)
2693 char *cp
= ext_args
;
2696 /* First arg is filename extension, starting with '.' */
2698 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2700 /* Find end of first arg. */
2701 while (*cp
&& !isspace (*cp
))
2705 error (_("'%s': two arguments required -- "
2706 "filename extension and language"),
2709 /* Null-terminate first arg. */
2712 /* Find beginning of second arg, which should be a source language. */
2713 cp
= skip_spaces (cp
);
2716 error (_("'%s': two arguments required -- "
2717 "filename extension and language"),
2720 /* Lookup the language from among those we know. */
2721 lang
= language_enum (cp
);
2723 auto it
= filename_language_table
.begin ();
2724 /* Now lookup the filename extension: do we already know it? */
2725 for (; it
!= filename_language_table
.end (); it
++)
2727 if (it
->ext
== ext_args
)
2731 if (it
== filename_language_table
.end ())
2733 /* New file extension. */
2734 add_filename_language (ext_args
, lang
);
2738 /* Redefining a previously known filename extension. */
2741 /* query ("Really make files of type %s '%s'?", */
2742 /* ext_args, language_str (lang)); */
2749 info_ext_lang_command (const char *args
, int from_tty
)
2751 printf_filtered (_("Filename extensions and the languages they represent:"));
2752 printf_filtered ("\n\n");
2753 for (const filename_language
&entry
: filename_language_table
)
2754 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2755 language_str (entry
.lang
));
2759 deduce_language_from_filename (const char *filename
)
2763 if (filename
!= NULL
)
2764 if ((cp
= strrchr (filename
, '.')) != NULL
)
2766 for (const filename_language
&entry
: filename_language_table
)
2767 if (entry
.ext
== cp
)
2771 return language_unknown
;
2774 /* Allocate and initialize a new symbol table.
2775 CUST is from the result of allocate_compunit_symtab. */
2778 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2780 struct objfile
*objfile
= cust
->objfile
;
2781 struct symtab
*symtab
2782 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2784 symtab
->filename
= objfile
->intern (filename
);
2785 symtab
->fullname
= NULL
;
2786 symtab
->language
= deduce_language_from_filename (filename
);
2788 /* This can be very verbose with lots of headers.
2789 Only print at higher debug levels. */
2790 if (symtab_create_debug
>= 2)
2792 /* Be a bit clever with debugging messages, and don't print objfile
2793 every time, only when it changes. */
2794 static char *last_objfile_name
= NULL
;
2796 if (last_objfile_name
== NULL
2797 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2799 xfree (last_objfile_name
);
2800 last_objfile_name
= xstrdup (objfile_name (objfile
));
2801 fprintf_filtered (gdb_stdlog
,
2802 "Creating one or more symtabs for objfile %s ...\n",
2805 fprintf_filtered (gdb_stdlog
,
2806 "Created symtab %s for module %s.\n",
2807 host_address_to_string (symtab
), filename
);
2810 /* Add it to CUST's list of symtabs. */
2811 if (cust
->filetabs
== NULL
)
2813 cust
->filetabs
= symtab
;
2814 cust
->last_filetab
= symtab
;
2818 cust
->last_filetab
->next
= symtab
;
2819 cust
->last_filetab
= symtab
;
2822 /* Backlink to the containing compunit symtab. */
2823 symtab
->compunit_symtab
= cust
;
2828 /* Allocate and initialize a new compunit.
2829 NAME is the name of the main source file, if there is one, or some
2830 descriptive text if there are no source files. */
2832 struct compunit_symtab
*
2833 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2835 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2836 struct compunit_symtab
);
2837 const char *saved_name
;
2839 cu
->objfile
= objfile
;
2841 /* The name we record here is only for display/debugging purposes.
2842 Just save the basename to avoid path issues (too long for display,
2843 relative vs absolute, etc.). */
2844 saved_name
= lbasename (name
);
2845 cu
->name
= obstack_strdup (&objfile
->objfile_obstack
, saved_name
);
2847 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2849 if (symtab_create_debug
)
2851 fprintf_filtered (gdb_stdlog
,
2852 "Created compunit symtab %s for %s.\n",
2853 host_address_to_string (cu
),
2860 /* Hook CU to the objfile it comes from. */
2863 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2865 cu
->next
= cu
->objfile
->compunit_symtabs
;
2866 cu
->objfile
->compunit_symtabs
= cu
;
2870 /* Reset all data structures in gdb which may contain references to
2871 symbol table data. */
2874 clear_symtab_users (symfile_add_flags add_flags
)
2876 /* Someday, we should do better than this, by only blowing away
2877 the things that really need to be blown. */
2879 /* Clear the "current" symtab first, because it is no longer valid.
2880 breakpoint_re_set may try to access the current symtab. */
2881 clear_current_source_symtab_and_line ();
2884 clear_last_displayed_sal ();
2885 clear_pc_function_cache ();
2886 gdb::observers::new_objfile
.notify (NULL
);
2888 /* Varobj may refer to old symbols, perform a cleanup. */
2889 varobj_invalidate ();
2891 /* Now that the various caches have been cleared, we can re_set
2892 our breakpoints without risking it using stale data. */
2893 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2894 breakpoint_re_set ();
2898 The following code implements an abstraction for debugging overlay sections.
2900 The target model is as follows:
2901 1) The gnu linker will permit multiple sections to be mapped into the
2902 same VMA, each with its own unique LMA (or load address).
2903 2) It is assumed that some runtime mechanism exists for mapping the
2904 sections, one by one, from the load address into the VMA address.
2905 3) This code provides a mechanism for gdb to keep track of which
2906 sections should be considered to be mapped from the VMA to the LMA.
2907 This information is used for symbol lookup, and memory read/write.
2908 For instance, if a section has been mapped then its contents
2909 should be read from the VMA, otherwise from the LMA.
2911 Two levels of debugger support for overlays are available. One is
2912 "manual", in which the debugger relies on the user to tell it which
2913 overlays are currently mapped. This level of support is
2914 implemented entirely in the core debugger, and the information about
2915 whether a section is mapped is kept in the objfile->obj_section table.
2917 The second level of support is "automatic", and is only available if
2918 the target-specific code provides functionality to read the target's
2919 overlay mapping table, and translate its contents for the debugger
2920 (by updating the mapped state information in the obj_section tables).
2922 The interface is as follows:
2924 overlay map <name> -- tell gdb to consider this section mapped
2925 overlay unmap <name> -- tell gdb to consider this section unmapped
2926 overlay list -- list the sections that GDB thinks are mapped
2927 overlay read-target -- get the target's state of what's mapped
2928 overlay off/manual/auto -- set overlay debugging state
2929 Functional interface:
2930 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2931 section, return that section.
2932 find_pc_overlay(pc): find any overlay section that contains
2933 the pc, either in its VMA or its LMA
2934 section_is_mapped(sect): true if overlay is marked as mapped
2935 section_is_overlay(sect): true if section's VMA != LMA
2936 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2937 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2938 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2939 overlay_mapped_address(...): map an address from section's LMA to VMA
2940 overlay_unmapped_address(...): map an address from section's VMA to LMA
2941 symbol_overlayed_address(...): Return a "current" address for symbol:
2942 either in VMA or LMA depending on whether
2943 the symbol's section is currently mapped. */
2945 /* Overlay debugging state: */
2947 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2948 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2950 /* Function: section_is_overlay (SECTION)
2951 Returns true if SECTION has VMA not equal to LMA, ie.
2952 SECTION is loaded at an address different from where it will "run". */
2955 section_is_overlay (struct obj_section
*section
)
2957 if (overlay_debugging
&& section
)
2959 asection
*bfd_section
= section
->the_bfd_section
;
2961 if (bfd_section_lma (bfd_section
) != 0
2962 && bfd_section_lma (bfd_section
) != bfd_section_vma (bfd_section
))
2969 /* Function: overlay_invalidate_all (void)
2970 Invalidate the mapped state of all overlay sections (mark it as stale). */
2973 overlay_invalidate_all (void)
2975 struct obj_section
*sect
;
2977 for (objfile
*objfile
: current_program_space
->objfiles ())
2978 ALL_OBJFILE_OSECTIONS (objfile
, sect
)
2979 if (section_is_overlay (sect
))
2980 sect
->ovly_mapped
= -1;
2983 /* Function: section_is_mapped (SECTION)
2984 Returns true if section is an overlay, and is currently mapped.
2986 Access to the ovly_mapped flag is restricted to this function, so
2987 that we can do automatic update. If the global flag
2988 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2989 overlay_invalidate_all. If the mapped state of the particular
2990 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2993 section_is_mapped (struct obj_section
*osect
)
2995 struct gdbarch
*gdbarch
;
2997 if (osect
== 0 || !section_is_overlay (osect
))
3000 switch (overlay_debugging
)
3004 return 0; /* overlay debugging off */
3005 case ovly_auto
: /* overlay debugging automatic */
3006 /* Unles there is a gdbarch_overlay_update function,
3007 there's really nothing useful to do here (can't really go auto). */
3008 gdbarch
= osect
->objfile
->arch ();
3009 if (gdbarch_overlay_update_p (gdbarch
))
3011 if (overlay_cache_invalid
)
3013 overlay_invalidate_all ();
3014 overlay_cache_invalid
= 0;
3016 if (osect
->ovly_mapped
== -1)
3017 gdbarch_overlay_update (gdbarch
, osect
);
3020 case ovly_on
: /* overlay debugging manual */
3021 return osect
->ovly_mapped
== 1;
3025 /* Function: pc_in_unmapped_range
3026 If PC falls into the lma range of SECTION, return true, else false. */
3029 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3031 if (section_is_overlay (section
))
3033 asection
*bfd_section
= section
->the_bfd_section
;
3035 /* We assume the LMA is relocated by the same offset as the VMA. */
3036 bfd_vma size
= bfd_section_size (bfd_section
);
3037 CORE_ADDR offset
= obj_section_offset (section
);
3039 if (bfd_section_lma (bfd_section
) + offset
<= pc
3040 && pc
< bfd_section_lma (bfd_section
) + offset
+ size
)
3047 /* Function: pc_in_mapped_range
3048 If PC falls into the vma range of SECTION, return true, else false. */
3051 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3053 if (section_is_overlay (section
))
3055 if (obj_section_addr (section
) <= pc
3056 && pc
< obj_section_endaddr (section
))
3063 /* Return true if the mapped ranges of sections A and B overlap, false
3067 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3069 CORE_ADDR a_start
= obj_section_addr (a
);
3070 CORE_ADDR a_end
= obj_section_endaddr (a
);
3071 CORE_ADDR b_start
= obj_section_addr (b
);
3072 CORE_ADDR b_end
= obj_section_endaddr (b
);
3074 return (a_start
< b_end
&& b_start
< a_end
);
3077 /* Function: overlay_unmapped_address (PC, SECTION)
3078 Returns the address corresponding to PC in the unmapped (load) range.
3079 May be the same as PC. */
3082 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3084 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3086 asection
*bfd_section
= section
->the_bfd_section
;
3088 return (pc
+ bfd_section_lma (bfd_section
)
3089 - bfd_section_vma (bfd_section
));
3095 /* Function: overlay_mapped_address (PC, SECTION)
3096 Returns the address corresponding to PC in the mapped (runtime) range.
3097 May be the same as PC. */
3100 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3102 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3104 asection
*bfd_section
= section
->the_bfd_section
;
3106 return (pc
+ bfd_section_vma (bfd_section
)
3107 - bfd_section_lma (bfd_section
));
3113 /* Function: symbol_overlayed_address
3114 Return one of two addresses (relative to the VMA or to the LMA),
3115 depending on whether the section is mapped or not. */
3118 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3120 if (overlay_debugging
)
3122 /* If the symbol has no section, just return its regular address. */
3125 /* If the symbol's section is not an overlay, just return its
3127 if (!section_is_overlay (section
))
3129 /* If the symbol's section is mapped, just return its address. */
3130 if (section_is_mapped (section
))
3133 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3134 * then return its LOADED address rather than its vma address!!
3136 return overlay_unmapped_address (address
, section
);
3141 /* Function: find_pc_overlay (PC)
3142 Return the best-match overlay section for PC:
3143 If PC matches a mapped overlay section's VMA, return that section.
3144 Else if PC matches an unmapped section's VMA, return that section.
3145 Else if PC matches an unmapped section's LMA, return that section. */
3147 struct obj_section
*
3148 find_pc_overlay (CORE_ADDR pc
)
3150 struct obj_section
*osect
, *best_match
= NULL
;
3152 if (overlay_debugging
)
3154 for (objfile
*objfile
: current_program_space
->objfiles ())
3155 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3156 if (section_is_overlay (osect
))
3158 if (pc_in_mapped_range (pc
, osect
))
3160 if (section_is_mapped (osect
))
3165 else if (pc_in_unmapped_range (pc
, osect
))
3172 /* Function: find_pc_mapped_section (PC)
3173 If PC falls into the VMA address range of an overlay section that is
3174 currently marked as MAPPED, return that section. Else return NULL. */
3176 struct obj_section
*
3177 find_pc_mapped_section (CORE_ADDR pc
)
3179 struct obj_section
*osect
;
3181 if (overlay_debugging
)
3183 for (objfile
*objfile
: current_program_space
->objfiles ())
3184 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3185 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3192 /* Function: list_overlays_command
3193 Print a list of mapped sections and their PC ranges. */
3196 list_overlays_command (const char *args
, int from_tty
)
3199 struct obj_section
*osect
;
3201 if (overlay_debugging
)
3203 for (objfile
*objfile
: current_program_space
->objfiles ())
3204 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3205 if (section_is_mapped (osect
))
3207 struct gdbarch
*gdbarch
= objfile
->arch ();
3212 vma
= bfd_section_vma (osect
->the_bfd_section
);
3213 lma
= bfd_section_lma (osect
->the_bfd_section
);
3214 size
= bfd_section_size (osect
->the_bfd_section
);
3215 name
= bfd_section_name (osect
->the_bfd_section
);
3217 printf_filtered ("Section %s, loaded at ", name
);
3218 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3219 puts_filtered (" - ");
3220 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3221 printf_filtered (", mapped at ");
3222 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3223 puts_filtered (" - ");
3224 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3225 puts_filtered ("\n");
3231 printf_filtered (_("No sections are mapped.\n"));
3234 /* Function: map_overlay_command
3235 Mark the named section as mapped (ie. residing at its VMA address). */
3238 map_overlay_command (const char *args
, int from_tty
)
3240 struct obj_section
*sec
, *sec2
;
3242 if (!overlay_debugging
)
3243 error (_("Overlay debugging not enabled. Use "
3244 "either the 'overlay auto' or\n"
3245 "the 'overlay manual' command."));
3247 if (args
== 0 || *args
== 0)
3248 error (_("Argument required: name of an overlay section"));
3250 /* First, find a section matching the user supplied argument. */
3251 for (objfile
*obj_file
: current_program_space
->objfiles ())
3252 ALL_OBJFILE_OSECTIONS (obj_file
, sec
)
3253 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3255 /* Now, check to see if the section is an overlay. */
3256 if (!section_is_overlay (sec
))
3257 continue; /* not an overlay section */
3259 /* Mark the overlay as "mapped". */
3260 sec
->ovly_mapped
= 1;
3262 /* Next, make a pass and unmap any sections that are
3263 overlapped by this new section: */
3264 for (objfile
*objfile2
: current_program_space
->objfiles ())
3265 ALL_OBJFILE_OSECTIONS (objfile2
, sec2
)
3266 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
,
3270 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3271 bfd_section_name (sec2
->the_bfd_section
));
3272 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3276 error (_("No overlay section called %s"), args
);
3279 /* Function: unmap_overlay_command
3280 Mark the overlay section as unmapped
3281 (ie. resident in its LMA address range, rather than the VMA range). */
3284 unmap_overlay_command (const char *args
, int from_tty
)
3286 struct obj_section
*sec
= NULL
;
3288 if (!overlay_debugging
)
3289 error (_("Overlay debugging not enabled. "
3290 "Use either the 'overlay auto' or\n"
3291 "the 'overlay manual' command."));
3293 if (args
== 0 || *args
== 0)
3294 error (_("Argument required: name of an overlay section"));
3296 /* First, find a section matching the user supplied argument. */
3297 for (objfile
*objfile
: current_program_space
->objfiles ())
3298 ALL_OBJFILE_OSECTIONS (objfile
, sec
)
3299 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3301 if (!sec
->ovly_mapped
)
3302 error (_("Section %s is not mapped"), args
);
3303 sec
->ovly_mapped
= 0;
3306 error (_("No overlay section called %s"), args
);
3309 /* Function: overlay_auto_command
3310 A utility command to turn on overlay debugging.
3311 Possibly this should be done via a set/show command. */
3314 overlay_auto_command (const char *args
, int from_tty
)
3316 overlay_debugging
= ovly_auto
;
3317 enable_overlay_breakpoints ();
3319 printf_unfiltered (_("Automatic overlay debugging enabled."));
3322 /* Function: overlay_manual_command
3323 A utility command to turn on overlay debugging.
3324 Possibly this should be done via a set/show command. */
3327 overlay_manual_command (const char *args
, int from_tty
)
3329 overlay_debugging
= ovly_on
;
3330 disable_overlay_breakpoints ();
3332 printf_unfiltered (_("Overlay debugging enabled."));
3335 /* Function: overlay_off_command
3336 A utility command to turn on overlay debugging.
3337 Possibly this should be done via a set/show command. */
3340 overlay_off_command (const char *args
, int from_tty
)
3342 overlay_debugging
= ovly_off
;
3343 disable_overlay_breakpoints ();
3345 printf_unfiltered (_("Overlay debugging disabled."));
3349 overlay_load_command (const char *args
, int from_tty
)
3351 struct gdbarch
*gdbarch
= get_current_arch ();
3353 if (gdbarch_overlay_update_p (gdbarch
))
3354 gdbarch_overlay_update (gdbarch
, NULL
);
3356 error (_("This target does not know how to read its overlay state."));
3359 /* Command list chain containing all defined "overlay" subcommands. */
3360 static struct cmd_list_element
*overlaylist
;
3362 /* Target Overlays for the "Simplest" overlay manager:
3364 This is GDB's default target overlay layer. It works with the
3365 minimal overlay manager supplied as an example by Cygnus. The
3366 entry point is via a function pointer "gdbarch_overlay_update",
3367 so targets that use a different runtime overlay manager can
3368 substitute their own overlay_update function and take over the
3371 The overlay_update function pokes around in the target's data structures
3372 to see what overlays are mapped, and updates GDB's overlay mapping with
3375 In this simple implementation, the target data structures are as follows:
3376 unsigned _novlys; /# number of overlay sections #/
3377 unsigned _ovly_table[_novlys][4] = {
3378 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3379 {..., ..., ..., ...},
3381 unsigned _novly_regions; /# number of overlay regions #/
3382 unsigned _ovly_region_table[_novly_regions][3] = {
3383 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3386 These functions will attempt to update GDB's mappedness state in the
3387 symbol section table, based on the target's mappedness state.
3389 To do this, we keep a cached copy of the target's _ovly_table, and
3390 attempt to detect when the cached copy is invalidated. The main
3391 entry point is "simple_overlay_update(SECT), which looks up SECT in
3392 the cached table and re-reads only the entry for that section from
3393 the target (whenever possible). */
3395 /* Cached, dynamically allocated copies of the target data structures: */
3396 static unsigned (*cache_ovly_table
)[4] = 0;
3397 static unsigned cache_novlys
= 0;
3398 static CORE_ADDR cache_ovly_table_base
= 0;
3401 VMA
, OSIZE
, LMA
, MAPPED
3404 /* Throw away the cached copy of _ovly_table. */
3407 simple_free_overlay_table (void)
3409 xfree (cache_ovly_table
);
3411 cache_ovly_table
= NULL
;
3412 cache_ovly_table_base
= 0;
3415 /* Read an array of ints of size SIZE from the target into a local buffer.
3416 Convert to host order. int LEN is number of ints. */
3419 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3420 int len
, int size
, enum bfd_endian byte_order
)
3422 /* FIXME (alloca): Not safe if array is very large. */
3423 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3426 read_memory (memaddr
, buf
, len
* size
);
3427 for (i
= 0; i
< len
; i
++)
3428 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3431 /* Find and grab a copy of the target _ovly_table
3432 (and _novlys, which is needed for the table's size). */
3435 simple_read_overlay_table (void)
3437 struct bound_minimal_symbol novlys_msym
;
3438 struct bound_minimal_symbol ovly_table_msym
;
3439 struct gdbarch
*gdbarch
;
3441 enum bfd_endian byte_order
;
3443 simple_free_overlay_table ();
3444 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3445 if (! novlys_msym
.minsym
)
3447 error (_("Error reading inferior's overlay table: "
3448 "couldn't find `_novlys' variable\n"
3449 "in inferior. Use `overlay manual' mode."));
3453 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3454 if (! ovly_table_msym
.minsym
)
3456 error (_("Error reading inferior's overlay table: couldn't find "
3457 "`_ovly_table' array\n"
3458 "in inferior. Use `overlay manual' mode."));
3462 gdbarch
= ovly_table_msym
.objfile
->arch ();
3463 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3464 byte_order
= gdbarch_byte_order (gdbarch
);
3466 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3469 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3470 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3471 read_target_long_array (cache_ovly_table_base
,
3472 (unsigned int *) cache_ovly_table
,
3473 cache_novlys
* 4, word_size
, byte_order
);
3475 return 1; /* SUCCESS */
3478 /* Function: simple_overlay_update_1
3479 A helper function for simple_overlay_update. Assuming a cached copy
3480 of _ovly_table exists, look through it to find an entry whose vma,
3481 lma and size match those of OSECT. Re-read the entry and make sure
3482 it still matches OSECT (else the table may no longer be valid).
3483 Set OSECT's mapped state to match the entry. Return: 1 for
3484 success, 0 for failure. */
3487 simple_overlay_update_1 (struct obj_section
*osect
)
3490 asection
*bsect
= osect
->the_bfd_section
;
3491 struct gdbarch
*gdbarch
= osect
->objfile
->arch ();
3492 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3493 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3495 for (i
= 0; i
< cache_novlys
; i
++)
3496 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3497 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3499 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3500 (unsigned int *) cache_ovly_table
[i
],
3501 4, word_size
, byte_order
);
3502 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3503 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3505 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3508 else /* Warning! Warning! Target's ovly table has changed! */
3514 /* Function: simple_overlay_update
3515 If OSECT is NULL, then update all sections' mapped state
3516 (after re-reading the entire target _ovly_table).
3517 If OSECT is non-NULL, then try to find a matching entry in the
3518 cached ovly_table and update only OSECT's mapped state.
3519 If a cached entry can't be found or the cache isn't valid, then
3520 re-read the entire cache, and go ahead and update all sections. */
3523 simple_overlay_update (struct obj_section
*osect
)
3525 /* Were we given an osect to look up? NULL means do all of them. */
3527 /* Have we got a cached copy of the target's overlay table? */
3528 if (cache_ovly_table
!= NULL
)
3530 /* Does its cached location match what's currently in the
3532 struct bound_minimal_symbol minsym
3533 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3535 if (minsym
.minsym
== NULL
)
3536 error (_("Error reading inferior's overlay table: couldn't "
3537 "find `_ovly_table' array\n"
3538 "in inferior. Use `overlay manual' mode."));
3540 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3541 /* Then go ahead and try to look up this single section in
3543 if (simple_overlay_update_1 (osect
))
3544 /* Found it! We're done. */
3548 /* Cached table no good: need to read the entire table anew.
3549 Or else we want all the sections, in which case it's actually
3550 more efficient to read the whole table in one block anyway. */
3552 if (! simple_read_overlay_table ())
3555 /* Now may as well update all sections, even if only one was requested. */
3556 for (objfile
*objfile
: current_program_space
->objfiles ())
3557 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3558 if (section_is_overlay (osect
))
3561 asection
*bsect
= osect
->the_bfd_section
;
3563 for (i
= 0; i
< cache_novlys
; i
++)
3564 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3565 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3566 { /* obj_section matches i'th entry in ovly_table. */
3567 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3568 break; /* finished with inner for loop: break out. */
3573 /* Set the output sections and output offsets for section SECTP in
3574 ABFD. The relocation code in BFD will read these offsets, so we
3575 need to be sure they're initialized. We map each section to itself,
3576 with no offset; this means that SECTP->vma will be honored. */
3579 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3581 sectp
->output_section
= sectp
;
3582 sectp
->output_offset
= 0;
3585 /* Default implementation for sym_relocate. */
3588 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3591 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3593 bfd
*abfd
= sectp
->owner
;
3595 /* We're only interested in sections with relocation
3597 if ((sectp
->flags
& SEC_RELOC
) == 0)
3600 /* We will handle section offsets properly elsewhere, so relocate as if
3601 all sections begin at 0. */
3602 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3604 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3607 /* Relocate the contents of a debug section SECTP in ABFD. The
3608 contents are stored in BUF if it is non-NULL, or returned in a
3609 malloc'd buffer otherwise.
3611 For some platforms and debug info formats, shared libraries contain
3612 relocations against the debug sections (particularly for DWARF-2;
3613 one affected platform is PowerPC GNU/Linux, although it depends on
3614 the version of the linker in use). Also, ELF object files naturally
3615 have unresolved relocations for their debug sections. We need to apply
3616 the relocations in order to get the locations of symbols correct.
3617 Another example that may require relocation processing, is the
3618 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3622 symfile_relocate_debug_section (struct objfile
*objfile
,
3623 asection
*sectp
, bfd_byte
*buf
)
3625 gdb_assert (objfile
->sf
->sym_relocate
);
3627 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3630 symfile_segment_data_up
3631 get_symfile_segment_data (bfd
*abfd
)
3633 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3638 return sf
->sym_segments (abfd
);
3642 - DATA, containing segment addresses from the object file ABFD, and
3643 the mapping from ABFD's sections onto the segments that own them,
3645 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3646 segment addresses reported by the target,
3647 store the appropriate offsets for each section in OFFSETS.
3649 If there are fewer entries in SEGMENT_BASES than there are segments
3650 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3652 If there are more entries, then ignore the extra. The target may
3653 not be able to distinguish between an empty data segment and a
3654 missing data segment; a missing text segment is less plausible. */
3657 symfile_map_offsets_to_segments (bfd
*abfd
,
3658 const struct symfile_segment_data
*data
,
3659 section_offsets
&offsets
,
3660 int num_segment_bases
,
3661 const CORE_ADDR
*segment_bases
)
3666 /* It doesn't make sense to call this function unless you have some
3667 segment base addresses. */
3668 gdb_assert (num_segment_bases
> 0);
3670 /* If we do not have segment mappings for the object file, we
3671 can not relocate it by segments. */
3672 gdb_assert (data
!= NULL
);
3673 gdb_assert (data
->segments
.size () > 0);
3675 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3677 int which
= data
->segment_info
[i
];
3679 gdb_assert (0 <= which
&& which
<= data
->segments
.size ());
3681 /* Don't bother computing offsets for sections that aren't
3682 loaded as part of any segment. */
3686 /* Use the last SEGMENT_BASES entry as the address of any extra
3687 segments mentioned in DATA->segment_info. */
3688 if (which
> num_segment_bases
)
3689 which
= num_segment_bases
;
3691 offsets
[i
] = segment_bases
[which
- 1] - data
->segments
[which
- 1].base
;
3698 symfile_find_segment_sections (struct objfile
*objfile
)
3700 bfd
*abfd
= objfile
->obfd
;
3704 symfile_segment_data_up data
3705 = get_symfile_segment_data (objfile
->obfd
);
3709 if (data
->segments
.size () != 1 && data
->segments
.size () != 2)
3712 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3714 int which
= data
->segment_info
[i
];
3718 if (objfile
->sect_index_text
== -1)
3719 objfile
->sect_index_text
= sect
->index
;
3721 if (objfile
->sect_index_rodata
== -1)
3722 objfile
->sect_index_rodata
= sect
->index
;
3724 else if (which
== 2)
3726 if (objfile
->sect_index_data
== -1)
3727 objfile
->sect_index_data
= sect
->index
;
3729 if (objfile
->sect_index_bss
== -1)
3730 objfile
->sect_index_bss
= sect
->index
;
3735 /* Listen for free_objfile events. */
3738 symfile_free_objfile (struct objfile
*objfile
)
3740 /* Remove the target sections owned by this objfile. */
3741 if (objfile
!= NULL
)
3742 remove_target_sections ((void *) objfile
);
3745 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3746 Expand all symtabs that match the specified criteria.
3747 See quick_symbol_functions.expand_symtabs_matching for details. */
3750 expand_symtabs_matching
3751 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3752 const lookup_name_info
&lookup_name
,
3753 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3754 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3755 enum search_domain kind
)
3757 for (objfile
*objfile
: current_program_space
->objfiles ())
3760 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3763 expansion_notify
, kind
);
3767 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3768 Map function FUN over every file.
3769 See quick_symbol_functions.map_symbol_filenames for details. */
3772 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3775 for (objfile
*objfile
: current_program_space
->objfiles ())
3778 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3785 namespace selftests
{
3786 namespace filename_language
{
3788 static void test_filename_language ()
3790 /* This test messes up the filename_language_table global. */
3791 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3793 /* Test deducing an unknown extension. */
3794 language lang
= deduce_language_from_filename ("myfile.blah");
3795 SELF_CHECK (lang
== language_unknown
);
3797 /* Test deducing a known extension. */
3798 lang
= deduce_language_from_filename ("myfile.c");
3799 SELF_CHECK (lang
== language_c
);
3801 /* Test adding a new extension using the internal API. */
3802 add_filename_language (".blah", language_pascal
);
3803 lang
= deduce_language_from_filename ("myfile.blah");
3804 SELF_CHECK (lang
== language_pascal
);
3808 test_set_ext_lang_command ()
3810 /* This test messes up the filename_language_table global. */
3811 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3813 /* Confirm that the .hello extension is not known. */
3814 language lang
= deduce_language_from_filename ("cake.hello");
3815 SELF_CHECK (lang
== language_unknown
);
3817 /* Test adding a new extension using the CLI command. */
3818 auto args_holder
= make_unique_xstrdup (".hello rust");
3819 ext_args
= args_holder
.get ();
3820 set_ext_lang_command (NULL
, 1, NULL
);
3822 lang
= deduce_language_from_filename ("cake.hello");
3823 SELF_CHECK (lang
== language_rust
);
3825 /* Test overriding an existing extension using the CLI command. */
3826 int size_before
= filename_language_table
.size ();
3827 args_holder
.reset (xstrdup (".hello pascal"));
3828 ext_args
= args_holder
.get ();
3829 set_ext_lang_command (NULL
, 1, NULL
);
3830 int size_after
= filename_language_table
.size ();
3832 lang
= deduce_language_from_filename ("cake.hello");
3833 SELF_CHECK (lang
== language_pascal
);
3834 SELF_CHECK (size_before
== size_after
);
3837 } /* namespace filename_language */
3838 } /* namespace selftests */
3840 #endif /* GDB_SELF_TEST */
3842 void _initialize_symfile ();
3844 _initialize_symfile ()
3846 struct cmd_list_element
*c
;
3848 gdb::observers::free_objfile
.attach (symfile_free_objfile
);
3850 #define READNOW_READNEVER_HELP \
3851 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3852 immediately. This makes the command slower, but may make future operations\n\
3854 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3855 symbolic debug information."
3857 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3858 Load symbol table from executable file FILE.\n\
3859 Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
3860 OFF is an optional offset which is added to each section address.\n\
3861 The `file' command can also load symbol tables, as well as setting the file\n\
3862 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3863 set_cmd_completer (c
, filename_completer
);
3865 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3866 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3867 Usage: add-symbol-file FILE [-readnow | -readnever] [-o OFF] [ADDR] \
3868 [-s SECT-NAME SECT-ADDR]...\n\
3869 ADDR is the starting address of the file's text.\n\
3870 Each '-s' argument provides a section name and address, and\n\
3871 should be specified if the data and bss segments are not contiguous\n\
3872 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n\
3873 OFF is an optional offset which is added to the default load addresses\n\
3874 of all sections for which no other address was specified.\n"
3875 READNOW_READNEVER_HELP
),
3877 set_cmd_completer (c
, filename_completer
);
3879 c
= add_cmd ("remove-symbol-file", class_files
,
3880 remove_symbol_file_command
, _("\
3881 Remove a symbol file added via the add-symbol-file command.\n\
3882 Usage: remove-symbol-file FILENAME\n\
3883 remove-symbol-file -a ADDRESS\n\
3884 The file to remove can be identified by its filename or by an address\n\
3885 that lies within the boundaries of this symbol file in memory."),
3888 c
= add_cmd ("load", class_files
, load_command
, _("\
3889 Dynamically load FILE into the running program.\n\
3890 FILE symbols are recorded for access from GDB.\n\
3891 Usage: load [FILE] [OFFSET]\n\
3892 An optional load OFFSET may also be given as a literal address.\n\
3893 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3894 on its own."), &cmdlist
);
3895 set_cmd_completer (c
, filename_completer
);
3897 add_basic_prefix_cmd ("overlay", class_support
,
3898 _("Commands for debugging overlays."), &overlaylist
,
3899 "overlay ", 0, &cmdlist
);
3901 add_com_alias ("ovly", "overlay", class_support
, 1);
3902 add_com_alias ("ov", "overlay", class_support
, 1);
3904 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3905 _("Assert that an overlay section is mapped."), &overlaylist
);
3907 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3908 _("Assert that an overlay section is unmapped."), &overlaylist
);
3910 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3911 _("List mappings of overlay sections."), &overlaylist
);
3913 add_cmd ("manual", class_support
, overlay_manual_command
,
3914 _("Enable overlay debugging."), &overlaylist
);
3915 add_cmd ("off", class_support
, overlay_off_command
,
3916 _("Disable overlay debugging."), &overlaylist
);
3917 add_cmd ("auto", class_support
, overlay_auto_command
,
3918 _("Enable automatic overlay debugging."), &overlaylist
);
3919 add_cmd ("load-target", class_support
, overlay_load_command
,
3920 _("Read the overlay mapping state from the target."), &overlaylist
);
3922 /* Filename extension to source language lookup table: */
3923 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3925 Set mapping between filename extension and source language."), _("\
3926 Show mapping between filename extension and source language."), _("\
3927 Usage: set extension-language .foo bar"),
3928 set_ext_lang_command
,
3930 &setlist
, &showlist
);
3932 add_info ("extensions", info_ext_lang_command
,
3933 _("All filename extensions associated with a source language."));
3935 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3936 &debug_file_directory
, _("\
3937 Set the directories where separate debug symbols are searched for."), _("\
3938 Show the directories where separate debug symbols are searched for."), _("\
3939 Separate debug symbols are first searched for in the same\n\
3940 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3941 and lastly at the path of the directory of the binary with\n\
3942 each global debug-file-directory component prepended."),
3944 show_debug_file_directory
,
3945 &setlist
, &showlist
);
3947 add_setshow_enum_cmd ("symbol-loading", no_class
,
3948 print_symbol_loading_enums
, &print_symbol_loading
,
3950 Set printing of symbol loading messages."), _("\
3951 Show printing of symbol loading messages."), _("\
3952 off == turn all messages off\n\
3953 brief == print messages for the executable,\n\
3954 and brief messages for shared libraries\n\
3955 full == print messages for the executable,\n\
3956 and messages for each shared library."),
3959 &setprintlist
, &showprintlist
);
3961 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3962 &separate_debug_file_debug
, _("\
3963 Set printing of separate debug info file search debug."), _("\
3964 Show printing of separate debug info file search debug."), _("\
3965 When on, GDB prints the searched locations while looking for separate debug \
3966 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
3969 selftests::register_test
3970 ("filename_language", selftests::filename_language::test_filename_language
);
3971 selftests::register_test
3972 ("set_ext_lang_command",
3973 selftests::filename_language::test_set_ext_lang_command
);