1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2021 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. */
91 int readnow_symbol_files
;
95 int readnever_symbol_files
;
97 /* Functions this file defines. */
99 static void symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
100 objfile_flags flags
, CORE_ADDR reloff
);
102 static const struct sym_fns
*find_sym_fns (bfd
*);
104 static void overlay_invalidate_all (void);
106 static void simple_free_overlay_table (void);
108 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
111 static int simple_read_overlay_table (void);
113 static int simple_overlay_update_1 (struct obj_section
*);
115 static void symfile_find_segment_sections (struct objfile
*objfile
);
117 /* List of all available sym_fns. On gdb startup, each object file reader
118 calls add_symtab_fns() to register information on each format it is
121 struct registered_sym_fns
123 registered_sym_fns (bfd_flavour sym_flavour_
, const struct sym_fns
*sym_fns_
)
124 : sym_flavour (sym_flavour_
), sym_fns (sym_fns_
)
127 /* BFD flavour that we handle. */
128 enum bfd_flavour sym_flavour
;
130 /* The "vtable" of symbol functions. */
131 const struct sym_fns
*sym_fns
;
134 static std::vector
<registered_sym_fns
> symtab_fns
;
136 /* Values for "set print symbol-loading". */
138 const char print_symbol_loading_off
[] = "off";
139 const char print_symbol_loading_brief
[] = "brief";
140 const char print_symbol_loading_full
[] = "full";
141 static const char *print_symbol_loading_enums
[] =
143 print_symbol_loading_off
,
144 print_symbol_loading_brief
,
145 print_symbol_loading_full
,
148 static const char *print_symbol_loading
= print_symbol_loading_full
;
152 bool auto_solib_add
= true;
155 /* Return non-zero if symbol-loading messages should be printed.
156 FROM_TTY is the standard from_tty argument to gdb commands.
157 If EXEC is non-zero the messages are for the executable.
158 Otherwise, messages are for shared libraries.
159 If FULL is non-zero then the caller is printing a detailed message.
160 E.g., the message includes the shared library name.
161 Otherwise, the caller is printing a brief "summary" message. */
164 print_symbol_loading_p (int from_tty
, int exec
, int full
)
166 if (!from_tty
&& !info_verbose
)
171 /* We don't check FULL for executables, there are few such
172 messages, therefore brief == full. */
173 return print_symbol_loading
!= print_symbol_loading_off
;
176 return print_symbol_loading
== print_symbol_loading_full
;
177 return print_symbol_loading
== print_symbol_loading_brief
;
180 /* True if we are reading a symbol table. */
182 int currently_reading_symtab
= 0;
184 /* Increment currently_reading_symtab and return a cleanup that can be
185 used to decrement it. */
187 scoped_restore_tmpl
<int>
188 increment_reading_symtab (void)
190 gdb_assert (currently_reading_symtab
>= 0);
191 return make_scoped_restore (¤tly_reading_symtab
,
192 currently_reading_symtab
+ 1);
195 /* Remember the lowest-addressed loadable section we've seen.
197 In case of equal vmas, the section with the largest size becomes the
198 lowest-addressed loadable section.
200 If the vmas and sizes are equal, the last section is considered the
201 lowest-addressed loadable section. */
204 find_lowest_section (asection
*sect
, asection
**lowest
)
206 if (0 == (bfd_section_flags (sect
) & (SEC_ALLOC
| SEC_LOAD
)))
209 *lowest
= sect
; /* First loadable section */
210 else if (bfd_section_vma (*lowest
) > bfd_section_vma (sect
))
211 *lowest
= sect
; /* A lower loadable section */
212 else if (bfd_section_vma (*lowest
) == bfd_section_vma (sect
)
213 && (bfd_section_size (*lowest
) <= bfd_section_size (sect
)))
217 /* Build (allocate and populate) a section_addr_info struct from
218 an existing section table. */
221 build_section_addr_info_from_section_table (const target_section_table
&table
)
223 section_addr_info sap
;
225 for (const target_section
&stp
: table
)
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 () < table
.size ())
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 /* Find a unique offset to use for loadable section SECT if
339 the user did not provide an offset. */
342 place_section (bfd
*abfd
, asection
*sect
, section_offsets
&offsets
,
345 CORE_ADDR start_addr
;
347 ULONGEST align
= ((ULONGEST
) 1) << bfd_section_alignment (sect
);
349 /* We are only interested in allocated sections. */
350 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
353 /* If the user specified an offset, honor it. */
354 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
357 /* Otherwise, let's try to find a place for the section. */
358 start_addr
= (lowest
+ align
- 1) & -align
;
365 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
367 int indx
= cur_sec
->index
;
369 /* We don't need to compare against ourself. */
373 /* We can only conflict with allocated sections. */
374 if ((bfd_section_flags (cur_sec
) & SEC_ALLOC
) == 0)
377 /* If the section offset is 0, either the section has not been placed
378 yet, or it was the lowest section placed (in which case LOWEST
379 will be past its end). */
380 if (offsets
[indx
] == 0)
383 /* If this section would overlap us, then we must move up. */
384 if (start_addr
+ bfd_section_size (sect
) > offsets
[indx
]
385 && start_addr
< offsets
[indx
] + bfd_section_size (cur_sec
))
387 start_addr
= offsets
[indx
] + bfd_section_size (cur_sec
);
388 start_addr
= (start_addr
+ align
- 1) & -align
;
393 /* Otherwise, we appear to be OK. So far. */
398 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
399 lowest
= start_addr
+ bfd_section_size (sect
);
402 /* Store section_addr_info as prepared (made relative and with SECTINDEX
403 filled-in) by addr_info_make_relative into SECTION_OFFSETS. */
406 relative_addr_info_to_section_offsets (section_offsets
§ion_offsets
,
407 const section_addr_info
&addrs
)
411 section_offsets
.assign (section_offsets
.size (), 0);
413 /* Now calculate offsets for section that were specified by the caller. */
414 for (i
= 0; i
< addrs
.size (); i
++)
416 const struct other_sections
*osp
;
419 if (osp
->sectindex
== -1)
422 /* Record all sections in offsets. */
423 /* The section_offsets in the objfile are here filled in using
425 section_offsets
[osp
->sectindex
] = osp
->addr
;
429 /* Transform section name S for a name comparison. prelink can split section
430 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
431 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
432 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
433 (`.sbss') section has invalid (increased) virtual address. */
436 addr_section_name (const char *s
)
438 if (strcmp (s
, ".dynbss") == 0)
440 if (strcmp (s
, ".sdynbss") == 0)
446 /* std::sort comparator for addrs_section_sort. Sort entries in
447 ascending order by their (name, sectindex) pair. sectindex makes
448 the sort by name stable. */
451 addrs_section_compar (const struct other_sections
*a
,
452 const struct other_sections
*b
)
456 retval
= strcmp (addr_section_name (a
->name
.c_str ()),
457 addr_section_name (b
->name
.c_str ()));
461 return a
->sectindex
< b
->sectindex
;
464 /* Provide sorted array of pointers to sections of ADDRS. */
466 static std::vector
<const struct other_sections
*>
467 addrs_section_sort (const section_addr_info
&addrs
)
471 std::vector
<const struct other_sections
*> array (addrs
.size ());
472 for (i
= 0; i
< addrs
.size (); i
++)
473 array
[i
] = &addrs
[i
];
475 std::sort (array
.begin (), array
.end (), addrs_section_compar
);
480 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
481 also SECTINDEXes specific to ABFD there. This function can be used to
482 rebase ADDRS to start referencing different BFD than before. */
485 addr_info_make_relative (section_addr_info
*addrs
, bfd
*abfd
)
487 asection
*lower_sect
;
488 CORE_ADDR lower_offset
;
491 /* Find lowest loadable section to be used as starting point for
492 contiguous sections. */
494 for (asection
*iter
: gdb_bfd_sections (abfd
))
495 find_lowest_section (iter
, &lower_sect
);
496 if (lower_sect
== NULL
)
498 warning (_("no loadable sections found in added symbol-file %s"),
499 bfd_get_filename (abfd
));
503 lower_offset
= bfd_section_vma (lower_sect
);
505 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
506 in ABFD. Section names are not unique - there can be multiple sections of
507 the same name. Also the sections of the same name do not have to be
508 adjacent to each other. Some sections may be present only in one of the
509 files. Even sections present in both files do not have to be in the same
512 Use stable sort by name for the sections in both files. Then linearly
513 scan both lists matching as most of the entries as possible. */
515 std::vector
<const struct other_sections
*> addrs_sorted
516 = addrs_section_sort (*addrs
);
518 section_addr_info abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
519 std::vector
<const struct other_sections
*> abfd_addrs_sorted
520 = addrs_section_sort (abfd_addrs
);
522 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
523 ABFD_ADDRS_SORTED. */
525 std::vector
<const struct other_sections
*>
526 addrs_to_abfd_addrs (addrs
->size (), nullptr);
528 std::vector
<const struct other_sections
*>::iterator abfd_sorted_iter
529 = abfd_addrs_sorted
.begin ();
530 for (const other_sections
*sect
: addrs_sorted
)
532 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
534 while (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
535 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
539 if (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
540 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
545 /* Make the found item directly addressable from ADDRS. */
546 index_in_addrs
= sect
- addrs
->data ();
547 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
548 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_sorted_iter
;
550 /* Never use the same ABFD entry twice. */
555 /* Calculate offsets for the loadable sections.
556 FIXME! Sections must be in order of increasing loadable section
557 so that contiguous sections can use the lower-offset!!!
559 Adjust offsets if the segments are not contiguous.
560 If the section is contiguous, its offset should be set to
561 the offset of the highest loadable section lower than it
562 (the loadable section directly below it in memory).
563 this_offset = lower_offset = lower_addr - lower_orig_addr */
565 for (i
= 0; i
< addrs
->size (); i
++)
567 const struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
571 /* This is the index used by BFD. */
572 (*addrs
)[i
].sectindex
= sect
->sectindex
;
574 if ((*addrs
)[i
].addr
!= 0)
576 (*addrs
)[i
].addr
-= sect
->addr
;
577 lower_offset
= (*addrs
)[i
].addr
;
580 (*addrs
)[i
].addr
= lower_offset
;
584 /* addr_section_name transformation is not used for SECT_NAME. */
585 const std::string
§_name
= (*addrs
)[i
].name
;
587 /* This section does not exist in ABFD, which is normally
588 unexpected and we want to issue a warning.
590 However, the ELF prelinker does create a few sections which are
591 marked in the main executable as loadable (they are loaded in
592 memory from the DYNAMIC segment) and yet are not present in
593 separate debug info files. This is fine, and should not cause
594 a warning. Shared libraries contain just the section
595 ".gnu.liblist" but it is not marked as loadable there. There is
596 no other way to identify them than by their name as the sections
597 created by prelink have no special flags.
599 For the sections `.bss' and `.sbss' see addr_section_name. */
601 if (!(sect_name
== ".gnu.liblist"
602 || sect_name
== ".gnu.conflict"
603 || (sect_name
== ".bss"
605 && (*addrs
)[i
- 1].name
== ".dynbss"
606 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
607 || (sect_name
== ".sbss"
609 && (*addrs
)[i
- 1].name
== ".sdynbss"
610 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
611 warning (_("section %s not found in %s"), sect_name
.c_str (),
612 bfd_get_filename (abfd
));
614 (*addrs
)[i
].addr
= 0;
615 (*addrs
)[i
].sectindex
= -1;
620 /* Parse the user's idea of an offset for dynamic linking, into our idea
621 of how to represent it for fast symbol reading. This is the default
622 version of the sym_fns.sym_offsets function for symbol readers that
623 don't need to do anything special. It allocates a section_offsets table
624 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
627 default_symfile_offsets (struct objfile
*objfile
,
628 const section_addr_info
&addrs
)
630 objfile
->section_offsets
.resize (gdb_bfd_count_sections (objfile
->obfd
));
631 relative_addr_info_to_section_offsets (objfile
->section_offsets
, addrs
);
633 /* For relocatable files, all loadable sections will start at zero.
634 The zero is meaningless, so try to pick arbitrary addresses such
635 that no loadable sections overlap. This algorithm is quadratic,
636 but the number of sections in a single object file is generally
638 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
640 bfd
*abfd
= objfile
->obfd
;
643 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
644 /* We do not expect this to happen; just skip this step if the
645 relocatable file has a section with an assigned VMA. */
646 if (bfd_section_vma (cur_sec
) != 0)
651 section_offsets
&offsets
= objfile
->section_offsets
;
653 /* Pick non-overlapping offsets for sections the user did not
655 CORE_ADDR lowest
= 0;
656 for (asection
*sect
: gdb_bfd_sections (objfile
->obfd
))
657 place_section (objfile
->obfd
, sect
, objfile
->section_offsets
,
660 /* Correctly filling in the section offsets is not quite
661 enough. Relocatable files have two properties that
662 (most) shared objects do not:
664 - Their debug information will contain relocations. Some
665 shared libraries do also, but many do not, so this can not
668 - If there are multiple code sections they will be loaded
669 at different relative addresses in memory than they are
670 in the objfile, since all sections in the file will start
673 Because GDB has very limited ability to map from an
674 address in debug info to the correct code section,
675 it relies on adding SECT_OFF_TEXT to things which might be
676 code. If we clear all the section offsets, and set the
677 section VMAs instead, then symfile_relocate_debug_section
678 will return meaningful debug information pointing at the
681 GDB has too many different data structures for section
682 addresses - a bfd, objfile, and so_list all have section
683 tables, as does exec_ops. Some of these could probably
686 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
687 cur_sec
= cur_sec
->next
)
689 if ((bfd_section_flags (cur_sec
) & SEC_ALLOC
) == 0)
692 bfd_set_section_vma (cur_sec
, offsets
[cur_sec
->index
]);
693 exec_set_section_address (bfd_get_filename (abfd
),
695 offsets
[cur_sec
->index
]);
696 offsets
[cur_sec
->index
] = 0;
701 /* Remember the bfd indexes for the .text, .data, .bss and
703 init_objfile_sect_indices (objfile
);
706 /* Divide the file into segments, which are individual relocatable units.
707 This is the default version of the sym_fns.sym_segments function for
708 symbol readers that do not have an explicit representation of segments.
709 It assumes that object files do not have segments, and fully linked
710 files have a single segment. */
712 symfile_segment_data_up
713 default_symfile_segments (bfd
*abfd
)
719 /* Relocatable files contain enough information to position each
720 loadable section independently; they should not be relocated
722 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
725 /* Make sure there is at least one loadable section in the file. */
726 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
728 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
736 low
= bfd_section_vma (sect
);
737 high
= low
+ bfd_section_size (sect
);
739 symfile_segment_data_up
data (new symfile_segment_data
);
741 num_sections
= bfd_count_sections (abfd
);
743 /* All elements are initialized to 0 (map to no segment). */
744 data
->segment_info
.resize (num_sections
);
746 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
750 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
753 vma
= bfd_section_vma (sect
);
756 if (vma
+ bfd_section_size (sect
) > high
)
757 high
= vma
+ bfd_section_size (sect
);
759 data
->segment_info
[i
] = 1;
762 data
->segments
.emplace_back (low
, high
- low
);
767 /* This is a convenience function to call sym_read for OBJFILE and
768 possibly force the partial symbols to be read. */
771 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
773 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
774 objfile
->per_bfd
->minsyms_read
= true;
776 /* find_separate_debug_file_in_section should be called only if there is
777 single binary with no existing separate debug info file. */
778 if (!objfile
->has_partial_symbols ()
779 && objfile
->separate_debug_objfile
== NULL
780 && objfile
->separate_debug_objfile_backlink
== NULL
)
782 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
786 /* find_separate_debug_file_in_section uses the same filename for the
787 virtual section-as-bfd like the bfd filename containing the
788 section. Therefore use also non-canonical name form for the same
789 file containing the section. */
790 symbol_file_add_separate (abfd
.get (),
791 bfd_get_filename (abfd
.get ()),
792 add_flags
| SYMFILE_NOT_FILENAME
, objfile
);
795 if ((add_flags
& SYMFILE_NO_READ
) == 0)
796 require_partial_symbols (objfile
, false);
799 /* Initialize entry point information for this objfile. */
802 init_entry_point_info (struct objfile
*objfile
)
804 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
810 /* Save startup file's range of PC addresses to help blockframe.c
811 decide where the bottom of the stack is. */
813 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
815 /* Executable file -- record its entry point so we'll recognize
816 the startup file because it contains the entry point. */
817 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
818 ei
->entry_point_p
= 1;
820 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
821 && bfd_get_start_address (objfile
->obfd
) != 0)
823 /* Some shared libraries may have entry points set and be
824 runnable. There's no clear way to indicate this, so just check
825 for values other than zero. */
826 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
827 ei
->entry_point_p
= 1;
831 /* Examination of non-executable.o files. Short-circuit this stuff. */
832 ei
->entry_point_p
= 0;
835 if (ei
->entry_point_p
)
837 struct obj_section
*osect
;
838 CORE_ADDR entry_point
= ei
->entry_point
;
841 /* Make certain that the address points at real code, and not a
842 function descriptor. */
844 = gdbarch_convert_from_func_ptr_addr (objfile
->arch (),
846 current_top_target ());
848 /* Remove any ISA markers, so that this matches entries in the
851 = gdbarch_addr_bits_remove (objfile
->arch (), entry_point
);
854 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
856 struct bfd_section
*sect
= osect
->the_bfd_section
;
858 if (entry_point
>= bfd_section_vma (sect
)
859 && entry_point
< (bfd_section_vma (sect
)
860 + bfd_section_size (sect
)))
862 ei
->the_bfd_section_index
863 = gdb_bfd_section_index (objfile
->obfd
, sect
);
870 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
874 /* Process a symbol file, as either the main file or as a dynamically
877 This function does not set the OBJFILE's entry-point info.
879 OBJFILE is where the symbols are to be read from.
881 ADDRS is the list of section load addresses. If the user has given
882 an 'add-symbol-file' command, then this is the list of offsets and
883 addresses he or she provided as arguments to the command; or, if
884 we're handling a shared library, these are the actual addresses the
885 sections are loaded at, according to the inferior's dynamic linker
886 (as gleaned by GDB's shared library code). We convert each address
887 into an offset from the section VMA's as it appears in the object
888 file, and then call the file's sym_offsets function to convert this
889 into a format-specific offset table --- a `section_offsets'.
890 The sectindex field is used to control the ordering of sections
891 with the same name. Upon return, it is updated to contain the
892 corresponding BFD section index, or -1 if the section was not found.
894 ADD_FLAGS encodes verbosity level, whether this is main symbol or
895 an extra symbol file such as dynamically loaded code, and whether
896 breakpoint reset should be deferred. */
899 syms_from_objfile_1 (struct objfile
*objfile
,
900 section_addr_info
*addrs
,
901 symfile_add_flags add_flags
)
903 section_addr_info local_addr
;
904 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
906 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
907 objfile
->qf
= make_psymbol_functions ();
909 if (objfile
->sf
== NULL
)
911 /* No symbols to load, but we still need to make sure
912 that the section_offsets table is allocated. */
913 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
915 objfile
->section_offsets
.assign (num_sections
, 0);
919 /* Make sure that partially constructed symbol tables will be cleaned up
920 if an error occurs during symbol reading. */
921 gdb::optional
<clear_symtab_users_cleanup
> defer_clear_users
;
923 objfile_up
objfile_holder (objfile
);
925 /* If ADDRS is NULL, put together a dummy address list.
926 We now establish the convention that an addr of zero means
927 no load address was specified. */
933 /* We will modify the main symbol table, make sure that all its users
934 will be cleaned up if an error occurs during symbol reading. */
935 defer_clear_users
.emplace ((symfile_add_flag
) 0);
937 /* Since no error yet, throw away the old symbol table. */
939 if (current_program_space
->symfile_object_file
!= NULL
)
941 current_program_space
->symfile_object_file
->unlink ();
942 gdb_assert (current_program_space
->symfile_object_file
== NULL
);
945 /* Currently we keep symbols from the add-symbol-file command.
946 If the user wants to get rid of them, they should do "symbol-file"
947 without arguments first. Not sure this is the best behavior
950 (*objfile
->sf
->sym_new_init
) (objfile
);
953 /* Convert addr into an offset rather than an absolute address.
954 We find the lowest address of a loaded segment in the objfile,
955 and assume that <addr> is where that got loaded.
957 We no longer warn if the lowest section is not a text segment (as
958 happens for the PA64 port. */
959 if (addrs
->size () > 0)
960 addr_info_make_relative (addrs
, objfile
->obfd
);
962 /* Initialize symbol reading routines for this objfile, allow complaints to
963 appear for this new file, and record how verbose to be, then do the
964 initial symbol reading for this file. */
966 (*objfile
->sf
->sym_init
) (objfile
);
969 (*objfile
->sf
->sym_offsets
) (objfile
, *addrs
);
971 read_symbols (objfile
, add_flags
);
973 /* Discard cleanups as symbol reading was successful. */
975 objfile_holder
.release ();
976 if (defer_clear_users
)
977 defer_clear_users
->release ();
980 /* Same as syms_from_objfile_1, but also initializes the objfile
984 syms_from_objfile (struct objfile
*objfile
,
985 section_addr_info
*addrs
,
986 symfile_add_flags add_flags
)
988 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
989 init_entry_point_info (objfile
);
992 /* Perform required actions after either reading in the initial
993 symbols for a new objfile, or mapping in the symbols from a reusable
994 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
997 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
999 /* If this is the main symbol file we have to clean up all users of the
1000 old main symbol file. Otherwise it is sufficient to fixup all the
1001 breakpoints that may have been redefined by this symbol file. */
1002 if (add_flags
& SYMFILE_MAINLINE
)
1004 /* OK, make it the "real" symbol file. */
1005 current_program_space
->symfile_object_file
= objfile
;
1007 clear_symtab_users (add_flags
);
1009 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1011 breakpoint_re_set ();
1014 /* We're done reading the symbol file; finish off complaints. */
1015 clear_complaints ();
1018 /* Process a symbol file, as either the main file or as a dynamically
1021 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1022 A new reference is acquired by this function.
1024 For NAME description see the objfile constructor.
1026 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1027 extra, such as dynamically loaded code, and what to do with breakpoints.
1029 ADDRS is as described for syms_from_objfile_1, above.
1030 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1032 PARENT is the original objfile if ABFD is a separate debug info file.
1033 Otherwise PARENT is NULL.
1035 Upon success, returns a pointer to the objfile that was added.
1036 Upon failure, jumps back to command level (never returns). */
1038 static struct objfile
*
1039 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1040 symfile_add_flags add_flags
,
1041 section_addr_info
*addrs
,
1042 objfile_flags flags
, struct objfile
*parent
)
1044 struct objfile
*objfile
;
1045 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1046 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1047 const int always_confirm
= add_flags
& SYMFILE_ALWAYS_CONFIRM
;
1048 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1049 && (readnow_symbol_files
1050 || (add_flags
& SYMFILE_NO_READ
) == 0));
1052 if (readnow_symbol_files
)
1054 flags
|= OBJF_READNOW
;
1055 add_flags
&= ~SYMFILE_NO_READ
;
1057 else if (readnever_symbol_files
1058 || (parent
!= NULL
&& (parent
->flags
& OBJF_READNEVER
)))
1060 flags
|= OBJF_READNEVER
;
1061 add_flags
|= SYMFILE_NO_READ
;
1063 if ((add_flags
& SYMFILE_NOT_FILENAME
) != 0)
1064 flags
|= OBJF_NOT_FILENAME
;
1066 /* Give user a chance to burp if ALWAYS_CONFIRM or we'd be
1067 interactively wiping out any existing symbols. */
1071 || ((have_full_symbols () || have_partial_symbols ())
1073 && !query (_("Load new symbol table from \"%s\"? "), name
))
1074 error (_("Not confirmed."));
1077 flags
|= OBJF_MAINLINE
;
1078 objfile
= objfile::make (abfd
, name
, flags
, parent
);
1080 /* We either created a new mapped symbol table, mapped an existing
1081 symbol table file which has not had initial symbol reading
1082 performed, or need to read an unmapped symbol table. */
1085 if (deprecated_pre_add_symbol_hook
)
1086 deprecated_pre_add_symbol_hook (name
);
1088 printf_filtered (_("Reading symbols from %ps...\n"),
1089 styled_string (file_name_style
.style (), name
));
1091 syms_from_objfile (objfile
, addrs
, add_flags
);
1093 /* We now have at least a partial symbol table. Check to see if the
1094 user requested that all symbols be read on initial access via either
1095 the gdb startup command line or on a per symbol file basis. Expand
1096 all partial symbol tables for this objfile if so. */
1098 if ((flags
& OBJF_READNOW
))
1101 printf_filtered (_("Expanding full symbols from %ps...\n"),
1102 styled_string (file_name_style
.style (), name
));
1104 objfile
->expand_all_symtabs ();
1107 /* Note that we only print a message if we have no symbols and have
1108 no separate debug file. If there is a separate debug file which
1109 does not have symbols, we'll have emitted this message for that
1110 file, and so printing it twice is just redundant. */
1111 if (should_print
&& !objfile_has_symbols (objfile
)
1112 && objfile
->separate_debug_objfile
== nullptr)
1113 printf_filtered (_("(No debugging symbols found in %ps)\n"),
1114 styled_string (file_name_style
.style (), name
));
1118 if (deprecated_post_add_symbol_hook
)
1119 deprecated_post_add_symbol_hook ();
1122 /* We print some messages regardless of whether 'from_tty ||
1123 info_verbose' is true, so make sure they go out at the right
1125 gdb_flush (gdb_stdout
);
1127 if (objfile
->sf
== NULL
)
1129 gdb::observers::new_objfile
.notify (objfile
);
1130 return objfile
; /* No symbols. */
1133 finish_new_objfile (objfile
, add_flags
);
1135 gdb::observers::new_objfile
.notify (objfile
);
1137 bfd_cache_close_all ();
1141 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1142 see the objfile constructor. */
1145 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1146 symfile_add_flags symfile_flags
,
1147 struct objfile
*objfile
)
1149 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1150 because sections of BFD may not match sections of OBJFILE and because
1151 vma may have been modified by tools such as prelink. */
1152 section_addr_info sap
= build_section_addr_info_from_objfile (objfile
);
1154 symbol_file_add_with_addrs
1155 (bfd
, name
, symfile_flags
, &sap
,
1156 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1157 | OBJF_USERLOADED
| OBJF_MAINLINE
),
1161 /* Process the symbol file ABFD, as either the main file or as a
1162 dynamically loaded file.
1163 See symbol_file_add_with_addrs's comments for details. */
1166 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1167 symfile_add_flags add_flags
,
1168 section_addr_info
*addrs
,
1169 objfile_flags flags
, struct objfile
*parent
)
1171 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1175 /* Process a symbol file, as either the main file or as a dynamically
1176 loaded file. See symbol_file_add_with_addrs's comments for details. */
1179 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1180 section_addr_info
*addrs
, objfile_flags flags
)
1182 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1184 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1188 /* Call symbol_file_add() with default values and update whatever is
1189 affected by the loading of a new main().
1190 Used when the file is supplied in the gdb command line
1191 and by some targets with special loading requirements.
1192 The auxiliary function, symbol_file_add_main_1(), has the flags
1193 argument for the switches that can only be specified in the symbol_file
1197 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1199 symbol_file_add_main_1 (args
, add_flags
, 0, 0);
1203 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1204 objfile_flags flags
, CORE_ADDR reloff
)
1206 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1208 struct objfile
*objfile
= symbol_file_add (args
, add_flags
, NULL
, flags
);
1210 objfile_rebase (objfile
, reloff
);
1212 /* Getting new symbols may change our opinion about
1213 what is frameless. */
1214 reinit_frame_cache ();
1216 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1217 set_initial_language ();
1221 symbol_file_clear (int from_tty
)
1223 if ((have_full_symbols () || have_partial_symbols ())
1225 && (current_program_space
->symfile_object_file
1226 ? !query (_("Discard symbol table from `%s'? "),
1227 objfile_name (current_program_space
->symfile_object_file
))
1228 : !query (_("Discard symbol table? "))))
1229 error (_("Not confirmed."));
1231 /* solib descriptors may have handles to objfiles. Wipe them before their
1232 objfiles get stale by free_all_objfiles. */
1233 no_shared_libraries (NULL
, from_tty
);
1235 current_program_space
->free_all_objfiles ();
1237 clear_symtab_users (0);
1239 gdb_assert (current_program_space
->symfile_object_file
== NULL
);
1241 printf_filtered (_("No symbol file now.\n"));
1244 /* See symfile.h. */
1246 bool separate_debug_file_debug
= false;
1249 separate_debug_file_exists (const std::string
&name
, unsigned long crc
,
1250 struct objfile
*parent_objfile
)
1252 unsigned long file_crc
;
1254 struct stat parent_stat
, abfd_stat
;
1255 int verified_as_different
;
1257 /* Find a separate debug info file as if symbols would be present in
1258 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1259 section can contain just the basename of PARENT_OBJFILE without any
1260 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1261 the separate debug infos with the same basename can exist. */
1263 if (filename_cmp (name
.c_str (), objfile_name (parent_objfile
)) == 0)
1266 if (separate_debug_file_debug
)
1268 printf_filtered (_(" Trying %s..."), name
.c_str ());
1269 gdb_flush (gdb_stdout
);
1272 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
.c_str (), gnutarget
));
1276 if (separate_debug_file_debug
)
1277 printf_filtered (_(" no, unable to open.\n"));
1282 /* Verify symlinks were not the cause of filename_cmp name difference above.
1284 Some operating systems, e.g. Windows, do not provide a meaningful
1285 st_ino; they always set it to zero. (Windows does provide a
1286 meaningful st_dev.) Files accessed from gdbservers that do not
1287 support the vFile:fstat packet will also have st_ino set to zero.
1288 Do not indicate a duplicate library in either case. While there
1289 is no guarantee that a system that provides meaningful inode
1290 numbers will never set st_ino to zero, this is merely an
1291 optimization, so we do not need to worry about false negatives. */
1293 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1294 && abfd_stat
.st_ino
!= 0
1295 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1297 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1298 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1300 if (separate_debug_file_debug
)
1301 printf_filtered (_(" no, same file as the objfile.\n"));
1305 verified_as_different
= 1;
1308 verified_as_different
= 0;
1310 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1314 if (separate_debug_file_debug
)
1315 printf_filtered (_(" no, error computing CRC.\n"));
1320 if (crc
!= file_crc
)
1322 unsigned long parent_crc
;
1324 /* If the files could not be verified as different with
1325 bfd_stat then we need to calculate the parent's CRC
1326 to verify whether the files are different or not. */
1328 if (!verified_as_different
)
1330 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1332 if (separate_debug_file_debug
)
1333 printf_filtered (_(" no, error computing CRC.\n"));
1339 if (verified_as_different
|| parent_crc
!= file_crc
)
1340 warning (_("the debug information found in \"%s\""
1341 " does not match \"%s\" (CRC mismatch).\n"),
1342 name
.c_str (), objfile_name (parent_objfile
));
1344 if (separate_debug_file_debug
)
1345 printf_filtered (_(" no, CRC doesn't match.\n"));
1350 if (separate_debug_file_debug
)
1351 printf_filtered (_(" yes!\n"));
1356 char *debug_file_directory
= NULL
;
1358 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1359 struct cmd_list_element
*c
, const char *value
)
1361 fprintf_filtered (file
,
1362 _("The directory where separate debug "
1363 "symbols are searched for is \"%s\".\n"),
1367 #if ! defined (DEBUG_SUBDIRECTORY)
1368 #define DEBUG_SUBDIRECTORY ".debug"
1371 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1372 where the original file resides (may not be the same as
1373 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1374 looking for. CANON_DIR is the "realpath" form of DIR.
1375 DIR must contain a trailing '/'.
1376 Returns the path of the file with separate debug info, or an empty
1380 find_separate_debug_file (const char *dir
,
1381 const char *canon_dir
,
1382 const char *debuglink
,
1383 unsigned long crc32
, struct objfile
*objfile
)
1385 if (separate_debug_file_debug
)
1386 printf_filtered (_("\nLooking for separate debug info (debug link) for "
1387 "%s\n"), objfile_name (objfile
));
1389 /* First try in the same directory as the original file. */
1390 std::string debugfile
= dir
;
1391 debugfile
+= debuglink
;
1393 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1396 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1398 debugfile
+= DEBUG_SUBDIRECTORY
;
1400 debugfile
+= debuglink
;
1402 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1405 /* Then try in the global debugfile directories.
1407 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1408 cause "/..." lookups. */
1410 bool target_prefix
= startswith (dir
, "target:");
1411 const char *dir_notarget
= target_prefix
? dir
+ strlen ("target:") : dir
;
1412 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
1413 = dirnames_to_char_ptr_vec (debug_file_directory
);
1414 gdb::unique_xmalloc_ptr
<char> canon_sysroot
= gdb_realpath (gdb_sysroot
);
1416 /* MS-Windows/MS-DOS don't allow colons in file names; we must
1417 convert the drive letter into a one-letter directory, so that the
1418 file name resulting from splicing below will be valid.
1420 FIXME: The below only works when GDB runs on MS-Windows/MS-DOS.
1421 There are various remote-debugging scenarios where such a
1422 transformation of the drive letter might be required when GDB runs
1423 on a Posix host, see
1425 https://sourceware.org/ml/gdb-patches/2019-04/msg00605.html
1427 If some of those scenarios need to be supported, we will need to
1428 use a different condition for HAS_DRIVE_SPEC and a different macro
1429 instead of STRIP_DRIVE_SPEC, which work on Posix systems as well. */
1431 if (HAS_DRIVE_SPEC (dir_notarget
))
1433 drive
= dir_notarget
[0];
1434 dir_notarget
= STRIP_DRIVE_SPEC (dir_notarget
);
1437 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
1439 debugfile
= target_prefix
? "target:" : "";
1440 debugfile
+= debugdir
.get ();
1443 debugfile
+= dir_notarget
;
1444 debugfile
+= debuglink
;
1446 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1449 const char *base_path
= NULL
;
1450 if (canon_dir
!= NULL
)
1452 if (canon_sysroot
.get () != NULL
)
1453 base_path
= child_path (canon_sysroot
.get (), canon_dir
);
1455 base_path
= child_path (gdb_sysroot
, canon_dir
);
1457 if (base_path
!= NULL
)
1459 /* If the file is in the sysroot, try using its base path in
1460 the global debugfile directory. */
1461 debugfile
= target_prefix
? "target:" : "";
1462 debugfile
+= debugdir
.get ();
1464 debugfile
+= base_path
;
1466 debugfile
+= debuglink
;
1468 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1471 /* If the file is in the sysroot, try using its base path in
1472 the sysroot's global debugfile directory. */
1473 debugfile
= target_prefix
? "target:" : "";
1474 debugfile
+= gdb_sysroot
;
1475 debugfile
+= debugdir
.get ();
1477 debugfile
+= base_path
;
1479 debugfile
+= debuglink
;
1481 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1487 return std::string ();
1490 /* Modify PATH to contain only "[/]directory/" part of PATH.
1491 If there were no directory separators in PATH, PATH will be empty
1492 string on return. */
1495 terminate_after_last_dir_separator (char *path
)
1499 /* Strip off the final filename part, leaving the directory name,
1500 followed by a slash. The directory can be relative or absolute. */
1501 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1502 if (IS_DIR_SEPARATOR (path
[i
]))
1505 /* If I is -1 then no directory is present there and DIR will be "". */
1509 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1510 Returns pathname, or an empty string. */
1513 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1515 unsigned long crc32
;
1517 gdb::unique_xmalloc_ptr
<char> debuglink
1518 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1520 if (debuglink
== NULL
)
1522 /* There's no separate debug info, hence there's no way we could
1523 load it => no warning. */
1524 return std::string ();
1527 std::string dir
= objfile_name (objfile
);
1528 terminate_after_last_dir_separator (&dir
[0]);
1529 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1531 std::string debugfile
1532 = find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1533 debuglink
.get (), crc32
, objfile
);
1535 if (debugfile
.empty ())
1537 /* For PR gdb/9538, try again with realpath (if different from the
1542 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1543 && S_ISLNK (st_buf
.st_mode
))
1545 gdb::unique_xmalloc_ptr
<char> symlink_dir
1546 (lrealpath (objfile_name (objfile
)));
1547 if (symlink_dir
!= NULL
)
1549 terminate_after_last_dir_separator (symlink_dir
.get ());
1550 if (dir
!= symlink_dir
.get ())
1552 /* Different directory, so try using it. */
1553 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1566 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1570 validate_readnow_readnever (objfile_flags flags
)
1572 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1573 error (_("-readnow and -readnever cannot be used simultaneously"));
1576 /* This is the symbol-file command. Read the file, analyze its
1577 symbols, and add a struct symtab to a symtab list. The syntax of
1578 the command is rather bizarre:
1580 1. The function buildargv implements various quoting conventions
1581 which are undocumented and have little or nothing in common with
1582 the way things are quoted (or not quoted) elsewhere in GDB.
1584 2. Options are used, which are not generally used in GDB (perhaps
1585 "set mapped on", "set readnow on" would be better)
1587 3. The order of options matters, which is contrary to GNU
1588 conventions (because it is confusing and inconvenient). */
1591 symbol_file_command (const char *args
, int from_tty
)
1597 symbol_file_clear (from_tty
);
1601 objfile_flags flags
= OBJF_USERLOADED
;
1602 symfile_add_flags add_flags
= 0;
1604 bool stop_processing_options
= false;
1605 CORE_ADDR offset
= 0;
1610 add_flags
|= SYMFILE_VERBOSE
;
1612 gdb_argv
built_argv (args
);
1613 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1615 if (stop_processing_options
|| *arg
!= '-')
1620 error (_("Unrecognized argument \"%s\""), arg
);
1622 else if (strcmp (arg
, "-readnow") == 0)
1623 flags
|= OBJF_READNOW
;
1624 else if (strcmp (arg
, "-readnever") == 0)
1625 flags
|= OBJF_READNEVER
;
1626 else if (strcmp (arg
, "-o") == 0)
1628 arg
= built_argv
[++idx
];
1630 error (_("Missing argument to -o"));
1632 offset
= parse_and_eval_address (arg
);
1634 else if (strcmp (arg
, "--") == 0)
1635 stop_processing_options
= true;
1637 error (_("Unrecognized argument \"%s\""), arg
);
1641 error (_("no symbol file name was specified"));
1643 validate_readnow_readnever (flags
);
1645 /* Set SYMFILE_DEFER_BP_RESET because the proper displacement for a PIE
1646 (Position Independent Executable) main symbol file will only be
1647 computed by the solib_create_inferior_hook below. Without it,
1648 breakpoint_re_set would fail to insert the breakpoints with the zero
1650 add_flags
|= SYMFILE_DEFER_BP_RESET
;
1652 symbol_file_add_main_1 (name
, add_flags
, flags
, offset
);
1654 solib_create_inferior_hook (from_tty
);
1656 /* Now it's safe to re-add the breakpoints. */
1657 breakpoint_re_set ();
1661 /* Set the initial language. */
1664 set_initial_language (void)
1666 if (language_mode
== language_mode_manual
)
1668 enum language lang
= main_language ();
1669 /* Make C the default language. */
1670 enum language default_lang
= language_c
;
1672 if (lang
== language_unknown
)
1674 const char *name
= main_name ();
1676 = lookup_symbol_in_language (name
, NULL
, VAR_DOMAIN
, default_lang
,
1680 lang
= sym
->language ();
1683 if (lang
== language_unknown
)
1685 lang
= default_lang
;
1688 set_language (lang
);
1689 expected_language
= current_language
; /* Don't warn the user. */
1692 /* Open the file specified by NAME and hand it off to BFD for
1693 preliminary analysis. Return a newly initialized bfd *, which
1694 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1695 absolute). In case of trouble, error() is called. */
1698 symfile_bfd_open (const char *name
)
1702 gdb::unique_xmalloc_ptr
<char> absolute_name
;
1703 if (!is_target_filename (name
))
1705 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1707 /* Look down path for it, allocate 2nd new malloc'd copy. */
1708 desc
= openp (getenv ("PATH"),
1709 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1710 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1711 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1714 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1716 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1717 desc
= openp (getenv ("PATH"),
1718 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1719 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1723 perror_with_name (expanded_name
.get ());
1725 name
= absolute_name
.get ();
1728 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1729 if (sym_bfd
== NULL
)
1730 error (_("`%s': can't open to read symbols: %s."), name
,
1731 bfd_errmsg (bfd_get_error ()));
1733 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1734 bfd_set_cacheable (sym_bfd
.get (), 1);
1736 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1737 error (_("`%s': can't read symbols: %s."), name
,
1738 bfd_errmsg (bfd_get_error ()));
1743 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1744 the section was not found. */
1747 get_section_index (struct objfile
*objfile
, const char *section_name
)
1749 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1757 /* Link SF into the global symtab_fns list.
1758 FLAVOUR is the file format that SF handles.
1759 Called on startup by the _initialize routine in each object file format
1760 reader, to register information about each format the reader is prepared
1764 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1766 symtab_fns
.emplace_back (flavour
, sf
);
1769 /* Initialize OBJFILE to read symbols from its associated BFD. It
1770 either returns or calls error(). The result is an initialized
1771 struct sym_fns in the objfile structure, that contains cached
1772 information about the symbol file. */
1774 static const struct sym_fns
*
1775 find_sym_fns (bfd
*abfd
)
1777 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1779 if (our_flavour
== bfd_target_srec_flavour
1780 || our_flavour
== bfd_target_ihex_flavour
1781 || our_flavour
== bfd_target_tekhex_flavour
)
1782 return NULL
; /* No symbols. */
1784 for (const registered_sym_fns
&rsf
: symtab_fns
)
1785 if (our_flavour
== rsf
.sym_flavour
)
1788 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1789 bfd_get_target (abfd
));
1793 /* This function runs the load command of our current target. */
1796 load_command (const char *arg
, int from_tty
)
1800 /* The user might be reloading because the binary has changed. Take
1801 this opportunity to check. */
1802 reopen_exec_file ();
1808 const char *parg
, *prev
;
1810 arg
= get_exec_file (1);
1812 /* We may need to quote this string so buildargv can pull it
1815 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1817 temp
.append (prev
, parg
- prev
);
1819 temp
.push_back ('\\');
1821 /* If we have not copied anything yet, then we didn't see a
1822 character to quote, and we can just leave ARG unchanged. */
1826 arg
= temp
.c_str ();
1830 target_load (arg
, from_tty
);
1832 /* After re-loading the executable, we don't really know which
1833 overlays are mapped any more. */
1834 overlay_cache_invalid
= 1;
1837 /* This version of "load" should be usable for any target. Currently
1838 it is just used for remote targets, not inftarg.c or core files,
1839 on the theory that only in that case is it useful.
1841 Avoiding xmodem and the like seems like a win (a) because we don't have
1842 to worry about finding it, and (b) On VMS, fork() is very slow and so
1843 we don't want to run a subprocess. On the other hand, I'm not sure how
1844 performance compares. */
1846 static int validate_download
= 0;
1848 /* Opaque data for load_progress. */
1849 struct load_progress_data
1851 /* Cumulative data. */
1852 unsigned long write_count
= 0;
1853 unsigned long data_count
= 0;
1854 bfd_size_type total_size
= 0;
1857 /* Opaque data for load_progress for a single section. */
1858 struct load_progress_section_data
1860 load_progress_section_data (load_progress_data
*cumulative_
,
1861 const char *section_name_
, ULONGEST section_size_
,
1862 CORE_ADDR lma_
, gdb_byte
*buffer_
)
1863 : cumulative (cumulative_
), section_name (section_name_
),
1864 section_size (section_size_
), lma (lma_
), buffer (buffer_
)
1867 struct load_progress_data
*cumulative
;
1869 /* Per-section data. */
1870 const char *section_name
;
1871 ULONGEST section_sent
= 0;
1872 ULONGEST section_size
;
1877 /* Opaque data for load_section_callback. */
1878 struct load_section_data
1880 load_section_data (load_progress_data
*progress_data_
)
1881 : progress_data (progress_data_
)
1884 ~load_section_data ()
1886 for (auto &&request
: requests
)
1888 xfree (request
.data
);
1889 delete ((load_progress_section_data
*) request
.baton
);
1893 CORE_ADDR load_offset
= 0;
1894 struct load_progress_data
*progress_data
;
1895 std::vector
<struct memory_write_request
> requests
;
1898 /* Target write callback routine for progress reporting. */
1901 load_progress (ULONGEST bytes
, void *untyped_arg
)
1903 struct load_progress_section_data
*args
1904 = (struct load_progress_section_data
*) untyped_arg
;
1905 struct load_progress_data
*totals
;
1908 /* Writing padding data. No easy way to get at the cumulative
1909 stats, so just ignore this. */
1912 totals
= args
->cumulative
;
1914 if (bytes
== 0 && args
->section_sent
== 0)
1916 /* The write is just starting. Let the user know we've started
1918 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1920 hex_string (args
->section_size
),
1921 paddress (target_gdbarch (), args
->lma
));
1925 if (validate_download
)
1927 /* Broken memories and broken monitors manifest themselves here
1928 when bring new computers to life. This doubles already slow
1930 /* NOTE: cagney/1999-10-18: A more efficient implementation
1931 might add a verify_memory() method to the target vector and
1932 then use that. remote.c could implement that method using
1933 the ``qCRC'' packet. */
1934 gdb::byte_vector
check (bytes
);
1936 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1937 error (_("Download verify read failed at %s"),
1938 paddress (target_gdbarch (), args
->lma
));
1939 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1940 error (_("Download verify compare failed at %s"),
1941 paddress (target_gdbarch (), args
->lma
));
1943 totals
->data_count
+= bytes
;
1945 args
->buffer
+= bytes
;
1946 totals
->write_count
+= 1;
1947 args
->section_sent
+= bytes
;
1948 if (check_quit_flag ()
1949 || (deprecated_ui_load_progress_hook
!= NULL
1950 && deprecated_ui_load_progress_hook (args
->section_name
,
1951 args
->section_sent
)))
1952 error (_("Canceled the download"));
1954 if (deprecated_show_load_progress
!= NULL
)
1955 deprecated_show_load_progress (args
->section_name
,
1959 totals
->total_size
);
1962 /* Service function for generic_load. */
1965 load_one_section (bfd
*abfd
, asection
*asec
,
1966 struct load_section_data
*args
)
1968 bfd_size_type size
= bfd_section_size (asec
);
1969 const char *sect_name
= bfd_section_name (asec
);
1971 if ((bfd_section_flags (asec
) & SEC_LOAD
) == 0)
1977 ULONGEST begin
= bfd_section_lma (asec
) + args
->load_offset
;
1978 ULONGEST end
= begin
+ size
;
1979 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (size
);
1980 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1982 load_progress_section_data
*section_data
1983 = new load_progress_section_data (args
->progress_data
, sect_name
, size
,
1986 args
->requests
.emplace_back (begin
, end
, buffer
, section_data
);
1989 static void print_transfer_performance (struct ui_file
*stream
,
1990 unsigned long data_count
,
1991 unsigned long write_count
,
1992 std::chrono::steady_clock::duration d
);
1994 /* See symfile.h. */
1997 generic_load (const char *args
, int from_tty
)
1999 struct load_progress_data total_progress
;
2000 struct load_section_data
cbdata (&total_progress
);
2001 struct ui_out
*uiout
= current_uiout
;
2004 error_no_arg (_("file to load"));
2006 gdb_argv
argv (args
);
2008 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2010 if (argv
[1] != NULL
)
2014 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2016 /* If the last word was not a valid number then
2017 treat it as a file name with spaces in. */
2018 if (argv
[1] == endptr
)
2019 error (_("Invalid download offset:%s."), argv
[1]);
2021 if (argv
[2] != NULL
)
2022 error (_("Too many parameters."));
2025 /* Open the file for loading. */
2026 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
));
2027 if (loadfile_bfd
== NULL
)
2028 perror_with_name (filename
.get ());
2030 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2032 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2033 bfd_errmsg (bfd_get_error ()));
2036 for (asection
*asec
: gdb_bfd_sections (loadfile_bfd
))
2037 total_progress
.total_size
+= bfd_section_size (asec
);
2039 for (asection
*asec
: gdb_bfd_sections (loadfile_bfd
))
2040 load_one_section (loadfile_bfd
.get (), asec
, &cbdata
);
2042 using namespace std::chrono
;
2044 steady_clock::time_point start_time
= steady_clock::now ();
2046 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2047 load_progress
) != 0)
2048 error (_("Load failed"));
2050 steady_clock::time_point end_time
= steady_clock::now ();
2052 CORE_ADDR entry
= bfd_get_start_address (loadfile_bfd
.get ());
2053 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2054 uiout
->text ("Start address ");
2055 uiout
->field_core_addr ("address", target_gdbarch (), entry
);
2056 uiout
->text (", load size ");
2057 uiout
->field_unsigned ("load-size", total_progress
.data_count
);
2059 regcache_write_pc (get_current_regcache (), entry
);
2061 /* Reset breakpoints, now that we have changed the load image. For
2062 instance, breakpoints may have been set (or reset, by
2063 post_create_inferior) while connected to the target but before we
2064 loaded the program. In that case, the prologue analyzer could
2065 have read instructions from the target to find the right
2066 breakpoint locations. Loading has changed the contents of that
2069 breakpoint_re_set ();
2071 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2072 total_progress
.write_count
,
2073 end_time
- start_time
);
2076 /* Report on STREAM the performance of a memory transfer operation,
2077 such as 'load'. DATA_COUNT is the number of bytes transferred.
2078 WRITE_COUNT is the number of separate write operations, or 0, if
2079 that information is not available. TIME is how long the operation
2083 print_transfer_performance (struct ui_file
*stream
,
2084 unsigned long data_count
,
2085 unsigned long write_count
,
2086 std::chrono::steady_clock::duration time
)
2088 using namespace std::chrono
;
2089 struct ui_out
*uiout
= current_uiout
;
2091 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2093 uiout
->text ("Transfer rate: ");
2094 if (ms
.count () > 0)
2096 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2098 if (uiout
->is_mi_like_p ())
2100 uiout
->field_unsigned ("transfer-rate", rate
* 8);
2101 uiout
->text (" bits/sec");
2103 else if (rate
< 1024)
2105 uiout
->field_unsigned ("transfer-rate", rate
);
2106 uiout
->text (" bytes/sec");
2110 uiout
->field_unsigned ("transfer-rate", rate
/ 1024);
2111 uiout
->text (" KB/sec");
2116 uiout
->field_unsigned ("transferred-bits", (data_count
* 8));
2117 uiout
->text (" bits in <1 sec");
2119 if (write_count
> 0)
2122 uiout
->field_unsigned ("write-rate", data_count
/ write_count
);
2123 uiout
->text (" bytes/write");
2125 uiout
->text (".\n");
2128 /* Add an OFFSET to the start address of each section in OBJF, except
2129 sections that were specified in ADDRS. */
2132 set_objfile_default_section_offset (struct objfile
*objf
,
2133 const section_addr_info
&addrs
,
2136 /* Add OFFSET to all sections by default. */
2137 section_offsets
offsets (objf
->section_offsets
.size (), offset
);
2139 /* Create sorted lists of all sections in ADDRS as well as all
2140 sections in OBJF. */
2142 std::vector
<const struct other_sections
*> addrs_sorted
2143 = addrs_section_sort (addrs
);
2145 section_addr_info objf_addrs
2146 = build_section_addr_info_from_objfile (objf
);
2147 std::vector
<const struct other_sections
*> objf_addrs_sorted
2148 = addrs_section_sort (objf_addrs
);
2150 /* Walk the BFD section list, and if a matching section is found in
2151 ADDRS_SORTED_LIST, set its offset to zero to keep its address
2154 Note that both lists may contain multiple sections with the same
2155 name, and then the sections from ADDRS are matched in BFD order
2156 (thanks to sectindex). */
2158 std::vector
<const struct other_sections
*>::iterator addrs_sorted_iter
2159 = addrs_sorted
.begin ();
2160 for (const other_sections
*objf_sect
: objf_addrs_sorted
)
2162 const char *objf_name
= addr_section_name (objf_sect
->name
.c_str ());
2165 while (cmp
< 0 && addrs_sorted_iter
!= addrs_sorted
.end ())
2167 const struct other_sections
*sect
= *addrs_sorted_iter
;
2168 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
2169 cmp
= strcmp (sect_name
, objf_name
);
2171 ++addrs_sorted_iter
;
2175 offsets
[objf_sect
->sectindex
] = 0;
2178 /* Apply the new section offsets. */
2179 objfile_relocate (objf
, offsets
);
2182 /* This function allows the addition of incrementally linked object files.
2183 It does not modify any state in the target, only in the debugger. */
2186 add_symbol_file_command (const char *args
, int from_tty
)
2188 struct gdbarch
*gdbarch
= get_current_arch ();
2189 gdb::unique_xmalloc_ptr
<char> filename
;
2192 struct objfile
*objf
;
2193 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2194 symfile_add_flags add_flags
= 0;
2197 add_flags
|= SYMFILE_VERBOSE
;
2205 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2206 bool stop_processing_options
= false;
2207 CORE_ADDR offset
= 0;
2212 error (_("add-symbol-file takes a file name and an address"));
2214 bool seen_addr
= false;
2215 bool seen_offset
= false;
2216 gdb_argv
argv (args
);
2218 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2220 if (stop_processing_options
|| *arg
!= '-')
2222 if (filename
== NULL
)
2224 /* First non-option argument is always the filename. */
2225 filename
.reset (tilde_expand (arg
));
2227 else if (!seen_addr
)
2229 /* The second non-option argument is always the text
2230 address at which to load the program. */
2231 sect_opts
[0].value
= arg
;
2235 error (_("Unrecognized argument \"%s\""), arg
);
2237 else if (strcmp (arg
, "-readnow") == 0)
2238 flags
|= OBJF_READNOW
;
2239 else if (strcmp (arg
, "-readnever") == 0)
2240 flags
|= OBJF_READNEVER
;
2241 else if (strcmp (arg
, "-s") == 0)
2243 if (argv
[argcnt
+ 1] == NULL
)
2244 error (_("Missing section name after \"-s\""));
2245 else if (argv
[argcnt
+ 2] == NULL
)
2246 error (_("Missing section address after \"-s\""));
2248 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2250 sect_opts
.push_back (sect
);
2253 else if (strcmp (arg
, "-o") == 0)
2255 arg
= argv
[++argcnt
];
2257 error (_("Missing argument to -o"));
2259 offset
= parse_and_eval_address (arg
);
2262 else if (strcmp (arg
, "--") == 0)
2263 stop_processing_options
= true;
2265 error (_("Unrecognized argument \"%s\""), arg
);
2268 if (filename
== NULL
)
2269 error (_("You must provide a filename to be loaded."));
2271 validate_readnow_readnever (flags
);
2273 /* Print the prompt for the query below. And save the arguments into
2274 a sect_addr_info structure to be passed around to other
2275 functions. We have to split this up into separate print
2276 statements because hex_string returns a local static
2279 printf_unfiltered (_("add symbol table from file \"%s\""),
2281 section_addr_info section_addrs
;
2282 std::vector
<sect_opt
>::const_iterator it
= sect_opts
.begin ();
2285 for (; it
!= sect_opts
.end (); ++it
)
2288 const char *val
= it
->value
;
2289 const char *sec
= it
->name
;
2291 if (section_addrs
.empty ())
2292 printf_unfiltered (_(" at\n"));
2293 addr
= parse_and_eval_address (val
);
2295 /* Here we store the section offsets in the order they were
2296 entered on the command line. Every array element is
2297 assigned an ascending section index to preserve the above
2298 order over an unstable sorting algorithm. This dummy
2299 index is not used for any other purpose.
2301 section_addrs
.emplace_back (addr
, sec
, section_addrs
.size ());
2302 printf_filtered ("\t%s_addr = %s\n", sec
,
2303 paddress (gdbarch
, addr
));
2305 /* The object's sections are initialized when a
2306 call is made to build_objfile_section_table (objfile).
2307 This happens in reread_symbols.
2308 At this point, we don't know what file type this is,
2309 so we can't determine what section names are valid. */
2312 printf_unfiltered (_("%s offset by %s\n"),
2313 (section_addrs
.empty ()
2314 ? _(" with all sections")
2315 : _("with other sections")),
2316 paddress (gdbarch
, offset
));
2317 else if (section_addrs
.empty ())
2318 printf_unfiltered ("\n");
2320 if (from_tty
&& (!query ("%s", "")))
2321 error (_("Not confirmed."));
2323 objf
= symbol_file_add (filename
.get (), add_flags
, §ion_addrs
,
2325 if (!objfile_has_symbols (objf
) && objf
->per_bfd
->minimal_symbol_count
<= 0)
2326 warning (_("newly-added symbol file \"%s\" does not provide any symbols"),
2330 set_objfile_default_section_offset (objf
, section_addrs
, offset
);
2332 current_program_space
->add_target_sections (objf
);
2334 /* Getting new symbols may change our opinion about what is
2336 reinit_frame_cache ();
2340 /* This function removes a symbol file that was added via add-symbol-file. */
2343 remove_symbol_file_command (const char *args
, int from_tty
)
2345 struct objfile
*objf
= NULL
;
2346 struct program_space
*pspace
= current_program_space
;
2351 error (_("remove-symbol-file: no symbol file provided"));
2353 gdb_argv
argv (args
);
2355 if (strcmp (argv
[0], "-a") == 0)
2357 /* Interpret the next argument as an address. */
2360 if (argv
[1] == NULL
)
2361 error (_("Missing address argument"));
2363 if (argv
[2] != NULL
)
2364 error (_("Junk after %s"), argv
[1]);
2366 addr
= parse_and_eval_address (argv
[1]);
2368 for (objfile
*objfile
: current_program_space
->objfiles ())
2370 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2371 && (objfile
->flags
& OBJF_SHARED
) != 0
2372 && objfile
->pspace
== pspace
2373 && is_addr_in_objfile (addr
, objfile
))
2380 else if (argv
[0] != NULL
)
2382 /* Interpret the current argument as a file name. */
2384 if (argv
[1] != NULL
)
2385 error (_("Junk after %s"), argv
[0]);
2387 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2389 for (objfile
*objfile
: current_program_space
->objfiles ())
2391 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2392 && (objfile
->flags
& OBJF_SHARED
) != 0
2393 && objfile
->pspace
== pspace
2394 && filename_cmp (filename
.get (), objfile_name (objfile
)) == 0)
2403 error (_("No symbol file found"));
2406 && !query (_("Remove symbol table from file \"%s\"? "),
2407 objfile_name (objf
)))
2408 error (_("Not confirmed."));
2411 clear_symtab_users (0);
2414 /* Re-read symbols if a symbol-file has changed. */
2417 reread_symbols (void)
2420 struct stat new_statbuf
;
2422 std::vector
<struct objfile
*> new_objfiles
;
2424 for (objfile
*objfile
: current_program_space
->objfiles ())
2426 if (objfile
->obfd
== NULL
)
2429 /* Separate debug objfiles are handled in the main objfile. */
2430 if (objfile
->separate_debug_objfile_backlink
)
2433 /* If this object is from an archive (what you usually create with
2434 `ar', often called a `static library' on most systems, though
2435 a `shared library' on AIX is also an archive), then you should
2436 stat on the archive name, not member name. */
2437 if (objfile
->obfd
->my_archive
)
2438 res
= stat (bfd_get_filename (objfile
->obfd
->my_archive
), &new_statbuf
);
2440 res
= stat (objfile_name (objfile
), &new_statbuf
);
2443 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2444 printf_filtered (_("`%s' has disappeared; keeping its symbols.\n"),
2445 objfile_name (objfile
));
2448 new_modtime
= new_statbuf
.st_mtime
;
2449 if (new_modtime
!= objfile
->mtime
)
2451 printf_filtered (_("`%s' has changed; re-reading symbols.\n"),
2452 objfile_name (objfile
));
2454 /* There are various functions like symbol_file_add,
2455 symfile_bfd_open, syms_from_objfile, etc., which might
2456 appear to do what we want. But they have various other
2457 effects which we *don't* want. So we just do stuff
2458 ourselves. We don't worry about mapped files (for one thing,
2459 any mapped file will be out of date). */
2461 /* If we get an error, blow away this objfile (not sure if
2462 that is the correct response for things like shared
2464 objfile_up
objfile_holder (objfile
);
2466 /* We need to do this whenever any symbols go away. */
2467 clear_symtab_users_cleanup
defer_clear_users (0);
2469 if (current_program_space
->exec_bfd () != NULL
2470 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2471 bfd_get_filename (current_program_space
->exec_bfd ())) == 0)
2473 /* Reload EXEC_BFD without asking anything. */
2475 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2478 /* Keep the calls order approx. the same as in free_objfile. */
2480 /* Free the separate debug objfiles. It will be
2481 automatically recreated by sym_read. */
2482 free_objfile_separate_debug (objfile
);
2484 /* Clear the stale source cache. */
2485 forget_cached_source_info ();
2487 /* Remove any references to this objfile in the global
2489 preserve_values (objfile
);
2491 /* Nuke all the state that we will re-read. Much of the following
2492 code which sets things to NULL really is necessary to tell
2493 other parts of GDB that there is nothing currently there.
2495 Try to keep the freeing order compatible with free_objfile. */
2497 if (objfile
->sf
!= NULL
)
2499 (*objfile
->sf
->sym_finish
) (objfile
);
2502 clear_objfile_data (objfile
);
2504 /* Clean up any state BFD has sitting around. */
2506 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2507 const char *obfd_filename
;
2509 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2510 /* Open the new BFD before freeing the old one, so that
2511 the filename remains live. */
2512 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
));
2513 objfile
->obfd
= temp
.release ();
2514 if (objfile
->obfd
== NULL
)
2515 error (_("Can't open %s to read symbols."), obfd_filename
);
2518 std::string original_name
= objfile
->original_name
;
2520 /* bfd_openr sets cacheable to true, which is what we want. */
2521 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2522 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2523 bfd_errmsg (bfd_get_error ()));
2525 objfile
->reset_psymtabs ();
2527 /* NB: after this call to obstack_free, objfiles_changed
2528 will need to be called (see discussion below). */
2529 obstack_free (&objfile
->objfile_obstack
, 0);
2530 objfile
->sections
= NULL
;
2531 objfile
->section_offsets
.clear ();
2532 objfile
->sect_index_bss
= -1;
2533 objfile
->sect_index_data
= -1;
2534 objfile
->sect_index_rodata
= -1;
2535 objfile
->sect_index_text
= -1;
2536 objfile
->compunit_symtabs
= NULL
;
2537 objfile
->template_symbols
= NULL
;
2538 objfile
->static_links
.reset (nullptr);
2540 /* obstack_init also initializes the obstack so it is
2541 empty. We could use obstack_specify_allocation but
2542 gdb_obstack.h specifies the alloc/dealloc functions. */
2543 obstack_init (&objfile
->objfile_obstack
);
2545 /* set_objfile_per_bfd potentially allocates the per-bfd
2546 data on the objfile's obstack (if sharing data across
2547 multiple users is not possible), so it's important to
2548 do it *after* the obstack has been initialized. */
2549 set_objfile_per_bfd (objfile
);
2551 objfile
->original_name
2552 = obstack_strdup (&objfile
->objfile_obstack
, original_name
);
2554 /* Reset the sym_fns pointer. The ELF reader can change it
2555 based on whether .gdb_index is present, and we need it to
2556 start over. PR symtab/15885 */
2557 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2558 objfile
->qf
= make_psymbol_functions ();
2560 build_objfile_section_table (objfile
);
2562 /* What the hell is sym_new_init for, anyway? The concept of
2563 distinguishing between the main file and additional files
2564 in this way seems rather dubious. */
2565 if (objfile
== current_program_space
->symfile_object_file
)
2567 (*objfile
->sf
->sym_new_init
) (objfile
);
2570 (*objfile
->sf
->sym_init
) (objfile
);
2571 clear_complaints ();
2573 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2575 /* We are about to read new symbols and potentially also
2576 DWARF information. Some targets may want to pass addresses
2577 read from DWARF DIE's through an adjustment function before
2578 saving them, like MIPS, which may call into
2579 "find_pc_section". When called, that function will make
2580 use of per-objfile program space data.
2582 Since we discarded our section information above, we have
2583 dangling pointers in the per-objfile program space data
2584 structure. Force GDB to update the section mapping
2585 information by letting it know the objfile has changed,
2586 making the dangling pointers point to correct data
2589 objfiles_changed ();
2591 /* Recompute section offsets and section indices. */
2592 objfile
->sf
->sym_offsets (objfile
, {});
2594 read_symbols (objfile
, 0);
2596 if (!objfile_has_symbols (objfile
))
2599 printf_filtered (_("(no debugging symbols found)\n"));
2603 /* We're done reading the symbol file; finish off complaints. */
2604 clear_complaints ();
2606 /* Getting new symbols may change our opinion about what is
2609 reinit_frame_cache ();
2611 /* Discard cleanups as symbol reading was successful. */
2612 objfile_holder
.release ();
2613 defer_clear_users
.release ();
2615 /* If the mtime has changed between the time we set new_modtime
2616 and now, we *want* this to be out of date, so don't call stat
2618 objfile
->mtime
= new_modtime
;
2619 init_entry_point_info (objfile
);
2621 new_objfiles
.push_back (objfile
);
2625 if (!new_objfiles
.empty ())
2627 clear_symtab_users (0);
2629 /* clear_objfile_data for each objfile was called before freeing it and
2630 gdb::observers::new_objfile.notify (NULL) has been called by
2631 clear_symtab_users above. Notify the new files now. */
2632 for (auto iter
: new_objfiles
)
2633 gdb::observers::new_objfile
.notify (iter
);
2635 /* At least one objfile has changed, so we can consider that
2636 the executable we're debugging has changed too. */
2637 gdb::observers::executable_changed
.notify ();
2642 struct filename_language
2644 filename_language (const std::string
&ext_
, enum language lang_
)
2645 : ext (ext_
), lang (lang_
)
2652 static std::vector
<filename_language
> filename_language_table
;
2654 /* See symfile.h. */
2657 add_filename_language (const char *ext
, enum language lang
)
2659 gdb_assert (ext
!= nullptr);
2660 filename_language_table
.emplace_back (ext
, lang
);
2663 static char *ext_args
;
2665 show_ext_args (struct ui_file
*file
, int from_tty
,
2666 struct cmd_list_element
*c
, const char *value
)
2668 fprintf_filtered (file
,
2669 _("Mapping between filename extension "
2670 "and source language is \"%s\".\n"),
2675 set_ext_lang_command (const char *args
,
2676 int from_tty
, struct cmd_list_element
*e
)
2678 char *cp
= ext_args
;
2681 /* First arg is filename extension, starting with '.' */
2683 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2685 /* Find end of first arg. */
2686 while (*cp
&& !isspace (*cp
))
2690 error (_("'%s': two arguments required -- "
2691 "filename extension and language"),
2694 /* Null-terminate first arg. */
2697 /* Find beginning of second arg, which should be a source language. */
2698 cp
= skip_spaces (cp
);
2701 error (_("'%s': two arguments required -- "
2702 "filename extension and language"),
2705 /* Lookup the language from among those we know. */
2706 lang
= language_enum (cp
);
2708 auto it
= filename_language_table
.begin ();
2709 /* Now lookup the filename extension: do we already know it? */
2710 for (; it
!= filename_language_table
.end (); it
++)
2712 if (it
->ext
== ext_args
)
2716 if (it
== filename_language_table
.end ())
2718 /* New file extension. */
2719 add_filename_language (ext_args
, lang
);
2723 /* Redefining a previously known filename extension. */
2726 /* query ("Really make files of type %s '%s'?", */
2727 /* ext_args, language_str (lang)); */
2734 info_ext_lang_command (const char *args
, int from_tty
)
2736 printf_filtered (_("Filename extensions and the languages they represent:"));
2737 printf_filtered ("\n\n");
2738 for (const filename_language
&entry
: filename_language_table
)
2739 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2740 language_str (entry
.lang
));
2744 deduce_language_from_filename (const char *filename
)
2748 if (filename
!= NULL
)
2749 if ((cp
= strrchr (filename
, '.')) != NULL
)
2751 for (const filename_language
&entry
: filename_language_table
)
2752 if (entry
.ext
== cp
)
2756 return language_unknown
;
2759 /* Allocate and initialize a new symbol table.
2760 CUST is from the result of allocate_compunit_symtab. */
2763 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2765 struct objfile
*objfile
= cust
->objfile
;
2766 struct symtab
*symtab
2767 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2769 symtab
->filename
= objfile
->intern (filename
);
2770 symtab
->fullname
= NULL
;
2771 symtab
->language
= deduce_language_from_filename (filename
);
2773 /* This can be very verbose with lots of headers.
2774 Only print at higher debug levels. */
2775 if (symtab_create_debug
>= 2)
2777 /* Be a bit clever with debugging messages, and don't print objfile
2778 every time, only when it changes. */
2779 static char *last_objfile_name
= NULL
;
2781 if (last_objfile_name
== NULL
2782 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2784 xfree (last_objfile_name
);
2785 last_objfile_name
= xstrdup (objfile_name (objfile
));
2786 fprintf_filtered (gdb_stdlog
,
2787 "Creating one or more symtabs for objfile %s ...\n",
2790 fprintf_filtered (gdb_stdlog
,
2791 "Created symtab %s for module %s.\n",
2792 host_address_to_string (symtab
), filename
);
2795 /* Add it to CUST's list of symtabs. */
2796 if (cust
->filetabs
== NULL
)
2798 cust
->filetabs
= symtab
;
2799 cust
->last_filetab
= symtab
;
2803 cust
->last_filetab
->next
= symtab
;
2804 cust
->last_filetab
= symtab
;
2807 /* Backlink to the containing compunit symtab. */
2808 symtab
->compunit_symtab
= cust
;
2813 /* Allocate and initialize a new compunit.
2814 NAME is the name of the main source file, if there is one, or some
2815 descriptive text if there are no source files. */
2817 struct compunit_symtab
*
2818 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2820 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2821 struct compunit_symtab
);
2822 const char *saved_name
;
2824 cu
->objfile
= objfile
;
2826 /* The name we record here is only for display/debugging purposes.
2827 Just save the basename to avoid path issues (too long for display,
2828 relative vs absolute, etc.). */
2829 saved_name
= lbasename (name
);
2830 cu
->name
= obstack_strdup (&objfile
->objfile_obstack
, saved_name
);
2832 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2834 if (symtab_create_debug
)
2836 fprintf_filtered (gdb_stdlog
,
2837 "Created compunit symtab %s for %s.\n",
2838 host_address_to_string (cu
),
2845 /* Hook CU to the objfile it comes from. */
2848 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2850 cu
->next
= cu
->objfile
->compunit_symtabs
;
2851 cu
->objfile
->compunit_symtabs
= cu
;
2855 /* Reset all data structures in gdb which may contain references to
2856 symbol table data. */
2859 clear_symtab_users (symfile_add_flags add_flags
)
2861 /* Someday, we should do better than this, by only blowing away
2862 the things that really need to be blown. */
2864 /* Clear the "current" symtab first, because it is no longer valid.
2865 breakpoint_re_set may try to access the current symtab. */
2866 clear_current_source_symtab_and_line ();
2869 clear_last_displayed_sal ();
2870 clear_pc_function_cache ();
2871 gdb::observers::new_objfile
.notify (NULL
);
2873 /* Varobj may refer to old symbols, perform a cleanup. */
2874 varobj_invalidate ();
2876 /* Now that the various caches have been cleared, we can re_set
2877 our breakpoints without risking it using stale data. */
2878 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2879 breakpoint_re_set ();
2883 The following code implements an abstraction for debugging overlay sections.
2885 The target model is as follows:
2886 1) The gnu linker will permit multiple sections to be mapped into the
2887 same VMA, each with its own unique LMA (or load address).
2888 2) It is assumed that some runtime mechanism exists for mapping the
2889 sections, one by one, from the load address into the VMA address.
2890 3) This code provides a mechanism for gdb to keep track of which
2891 sections should be considered to be mapped from the VMA to the LMA.
2892 This information is used for symbol lookup, and memory read/write.
2893 For instance, if a section has been mapped then its contents
2894 should be read from the VMA, otherwise from the LMA.
2896 Two levels of debugger support for overlays are available. One is
2897 "manual", in which the debugger relies on the user to tell it which
2898 overlays are currently mapped. This level of support is
2899 implemented entirely in the core debugger, and the information about
2900 whether a section is mapped is kept in the objfile->obj_section table.
2902 The second level of support is "automatic", and is only available if
2903 the target-specific code provides functionality to read the target's
2904 overlay mapping table, and translate its contents for the debugger
2905 (by updating the mapped state information in the obj_section tables).
2907 The interface is as follows:
2909 overlay map <name> -- tell gdb to consider this section mapped
2910 overlay unmap <name> -- tell gdb to consider this section unmapped
2911 overlay list -- list the sections that GDB thinks are mapped
2912 overlay read-target -- get the target's state of what's mapped
2913 overlay off/manual/auto -- set overlay debugging state
2914 Functional interface:
2915 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2916 section, return that section.
2917 find_pc_overlay(pc): find any overlay section that contains
2918 the pc, either in its VMA or its LMA
2919 section_is_mapped(sect): true if overlay is marked as mapped
2920 section_is_overlay(sect): true if section's VMA != LMA
2921 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2922 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2923 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2924 overlay_mapped_address(...): map an address from section's LMA to VMA
2925 overlay_unmapped_address(...): map an address from section's VMA to LMA
2926 symbol_overlayed_address(...): Return a "current" address for symbol:
2927 either in VMA or LMA depending on whether
2928 the symbol's section is currently mapped. */
2930 /* Overlay debugging state: */
2932 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2933 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2935 /* Function: section_is_overlay (SECTION)
2936 Returns true if SECTION has VMA not equal to LMA, ie.
2937 SECTION is loaded at an address different from where it will "run". */
2940 section_is_overlay (struct obj_section
*section
)
2942 if (overlay_debugging
&& section
)
2944 asection
*bfd_section
= section
->the_bfd_section
;
2946 if (bfd_section_lma (bfd_section
) != 0
2947 && bfd_section_lma (bfd_section
) != bfd_section_vma (bfd_section
))
2954 /* Function: overlay_invalidate_all (void)
2955 Invalidate the mapped state of all overlay sections (mark it as stale). */
2958 overlay_invalidate_all (void)
2960 struct obj_section
*sect
;
2962 for (objfile
*objfile
: current_program_space
->objfiles ())
2963 ALL_OBJFILE_OSECTIONS (objfile
, sect
)
2964 if (section_is_overlay (sect
))
2965 sect
->ovly_mapped
= -1;
2968 /* Function: section_is_mapped (SECTION)
2969 Returns true if section is an overlay, and is currently mapped.
2971 Access to the ovly_mapped flag is restricted to this function, so
2972 that we can do automatic update. If the global flag
2973 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2974 overlay_invalidate_all. If the mapped state of the particular
2975 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2978 section_is_mapped (struct obj_section
*osect
)
2980 struct gdbarch
*gdbarch
;
2982 if (osect
== 0 || !section_is_overlay (osect
))
2985 switch (overlay_debugging
)
2989 return 0; /* overlay debugging off */
2990 case ovly_auto
: /* overlay debugging automatic */
2991 /* Unles there is a gdbarch_overlay_update function,
2992 there's really nothing useful to do here (can't really go auto). */
2993 gdbarch
= osect
->objfile
->arch ();
2994 if (gdbarch_overlay_update_p (gdbarch
))
2996 if (overlay_cache_invalid
)
2998 overlay_invalidate_all ();
2999 overlay_cache_invalid
= 0;
3001 if (osect
->ovly_mapped
== -1)
3002 gdbarch_overlay_update (gdbarch
, osect
);
3005 case ovly_on
: /* overlay debugging manual */
3006 return osect
->ovly_mapped
== 1;
3010 /* Function: pc_in_unmapped_range
3011 If PC falls into the lma range of SECTION, return true, else false. */
3014 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3016 if (section_is_overlay (section
))
3018 asection
*bfd_section
= section
->the_bfd_section
;
3020 /* We assume the LMA is relocated by the same offset as the VMA. */
3021 bfd_vma size
= bfd_section_size (bfd_section
);
3022 CORE_ADDR offset
= obj_section_offset (section
);
3024 if (bfd_section_lma (bfd_section
) + offset
<= pc
3025 && pc
< bfd_section_lma (bfd_section
) + offset
+ size
)
3032 /* Function: pc_in_mapped_range
3033 If PC falls into the vma range of SECTION, return true, else false. */
3036 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3038 if (section_is_overlay (section
))
3040 if (obj_section_addr (section
) <= pc
3041 && pc
< obj_section_endaddr (section
))
3048 /* Return true if the mapped ranges of sections A and B overlap, false
3052 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3054 CORE_ADDR a_start
= obj_section_addr (a
);
3055 CORE_ADDR a_end
= obj_section_endaddr (a
);
3056 CORE_ADDR b_start
= obj_section_addr (b
);
3057 CORE_ADDR b_end
= obj_section_endaddr (b
);
3059 return (a_start
< b_end
&& b_start
< a_end
);
3062 /* Function: overlay_unmapped_address (PC, SECTION)
3063 Returns the address corresponding to PC in the unmapped (load) range.
3064 May be the same as PC. */
3067 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3069 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3071 asection
*bfd_section
= section
->the_bfd_section
;
3073 return (pc
+ bfd_section_lma (bfd_section
)
3074 - bfd_section_vma (bfd_section
));
3080 /* Function: overlay_mapped_address (PC, SECTION)
3081 Returns the address corresponding to PC in the mapped (runtime) range.
3082 May be the same as PC. */
3085 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3087 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3089 asection
*bfd_section
= section
->the_bfd_section
;
3091 return (pc
+ bfd_section_vma (bfd_section
)
3092 - bfd_section_lma (bfd_section
));
3098 /* Function: symbol_overlayed_address
3099 Return one of two addresses (relative to the VMA or to the LMA),
3100 depending on whether the section is mapped or not. */
3103 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3105 if (overlay_debugging
)
3107 /* If the symbol has no section, just return its regular address. */
3110 /* If the symbol's section is not an overlay, just return its
3112 if (!section_is_overlay (section
))
3114 /* If the symbol's section is mapped, just return its address. */
3115 if (section_is_mapped (section
))
3118 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3119 * then return its LOADED address rather than its vma address!!
3121 return overlay_unmapped_address (address
, section
);
3126 /* Function: find_pc_overlay (PC)
3127 Return the best-match overlay section for PC:
3128 If PC matches a mapped overlay section's VMA, return that section.
3129 Else if PC matches an unmapped section's VMA, return that section.
3130 Else if PC matches an unmapped section's LMA, return that section. */
3132 struct obj_section
*
3133 find_pc_overlay (CORE_ADDR pc
)
3135 struct obj_section
*osect
, *best_match
= NULL
;
3137 if (overlay_debugging
)
3139 for (objfile
*objfile
: current_program_space
->objfiles ())
3140 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3141 if (section_is_overlay (osect
))
3143 if (pc_in_mapped_range (pc
, osect
))
3145 if (section_is_mapped (osect
))
3150 else if (pc_in_unmapped_range (pc
, osect
))
3157 /* Function: find_pc_mapped_section (PC)
3158 If PC falls into the VMA address range of an overlay section that is
3159 currently marked as MAPPED, return that section. Else return NULL. */
3161 struct obj_section
*
3162 find_pc_mapped_section (CORE_ADDR pc
)
3164 struct obj_section
*osect
;
3166 if (overlay_debugging
)
3168 for (objfile
*objfile
: current_program_space
->objfiles ())
3169 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3170 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3177 /* Function: list_overlays_command
3178 Print a list of mapped sections and their PC ranges. */
3181 list_overlays_command (const char *args
, int from_tty
)
3184 struct obj_section
*osect
;
3186 if (overlay_debugging
)
3188 for (objfile
*objfile
: current_program_space
->objfiles ())
3189 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3190 if (section_is_mapped (osect
))
3192 struct gdbarch
*gdbarch
= objfile
->arch ();
3197 vma
= bfd_section_vma (osect
->the_bfd_section
);
3198 lma
= bfd_section_lma (osect
->the_bfd_section
);
3199 size
= bfd_section_size (osect
->the_bfd_section
);
3200 name
= bfd_section_name (osect
->the_bfd_section
);
3202 printf_filtered ("Section %s, loaded at ", name
);
3203 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3204 puts_filtered (" - ");
3205 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3206 printf_filtered (", mapped at ");
3207 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3208 puts_filtered (" - ");
3209 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3210 puts_filtered ("\n");
3216 printf_filtered (_("No sections are mapped.\n"));
3219 /* Function: map_overlay_command
3220 Mark the named section as mapped (ie. residing at its VMA address). */
3223 map_overlay_command (const char *args
, int from_tty
)
3225 struct obj_section
*sec
, *sec2
;
3227 if (!overlay_debugging
)
3228 error (_("Overlay debugging not enabled. Use "
3229 "either the 'overlay auto' or\n"
3230 "the 'overlay manual' command."));
3232 if (args
== 0 || *args
== 0)
3233 error (_("Argument required: name of an overlay section"));
3235 /* First, find a section matching the user supplied argument. */
3236 for (objfile
*obj_file
: current_program_space
->objfiles ())
3237 ALL_OBJFILE_OSECTIONS (obj_file
, sec
)
3238 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3240 /* Now, check to see if the section is an overlay. */
3241 if (!section_is_overlay (sec
))
3242 continue; /* not an overlay section */
3244 /* Mark the overlay as "mapped". */
3245 sec
->ovly_mapped
= 1;
3247 /* Next, make a pass and unmap any sections that are
3248 overlapped by this new section: */
3249 for (objfile
*objfile2
: current_program_space
->objfiles ())
3250 ALL_OBJFILE_OSECTIONS (objfile2
, sec2
)
3251 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
,
3255 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3256 bfd_section_name (sec2
->the_bfd_section
));
3257 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3261 error (_("No overlay section called %s"), args
);
3264 /* Function: unmap_overlay_command
3265 Mark the overlay section as unmapped
3266 (ie. resident in its LMA address range, rather than the VMA range). */
3269 unmap_overlay_command (const char *args
, int from_tty
)
3271 struct obj_section
*sec
= NULL
;
3273 if (!overlay_debugging
)
3274 error (_("Overlay debugging not enabled. "
3275 "Use either the 'overlay auto' or\n"
3276 "the 'overlay manual' command."));
3278 if (args
== 0 || *args
== 0)
3279 error (_("Argument required: name of an overlay section"));
3281 /* First, find a section matching the user supplied argument. */
3282 for (objfile
*objfile
: current_program_space
->objfiles ())
3283 ALL_OBJFILE_OSECTIONS (objfile
, sec
)
3284 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3286 if (!sec
->ovly_mapped
)
3287 error (_("Section %s is not mapped"), args
);
3288 sec
->ovly_mapped
= 0;
3291 error (_("No overlay section called %s"), args
);
3294 /* Function: overlay_auto_command
3295 A utility command to turn on overlay debugging.
3296 Possibly this should be done via a set/show command. */
3299 overlay_auto_command (const char *args
, int from_tty
)
3301 overlay_debugging
= ovly_auto
;
3302 enable_overlay_breakpoints ();
3304 printf_unfiltered (_("Automatic overlay debugging enabled."));
3307 /* Function: overlay_manual_command
3308 A utility command to turn on overlay debugging.
3309 Possibly this should be done via a set/show command. */
3312 overlay_manual_command (const char *args
, int from_tty
)
3314 overlay_debugging
= ovly_on
;
3315 disable_overlay_breakpoints ();
3317 printf_unfiltered (_("Overlay debugging enabled."));
3320 /* Function: overlay_off_command
3321 A utility command to turn on overlay debugging.
3322 Possibly this should be done via a set/show command. */
3325 overlay_off_command (const char *args
, int from_tty
)
3327 overlay_debugging
= ovly_off
;
3328 disable_overlay_breakpoints ();
3330 printf_unfiltered (_("Overlay debugging disabled."));
3334 overlay_load_command (const char *args
, int from_tty
)
3336 struct gdbarch
*gdbarch
= get_current_arch ();
3338 if (gdbarch_overlay_update_p (gdbarch
))
3339 gdbarch_overlay_update (gdbarch
, NULL
);
3341 error (_("This target does not know how to read its overlay state."));
3344 /* Command list chain containing all defined "overlay" subcommands. */
3345 static struct cmd_list_element
*overlaylist
;
3347 /* Target Overlays for the "Simplest" overlay manager:
3349 This is GDB's default target overlay layer. It works with the
3350 minimal overlay manager supplied as an example by Cygnus. The
3351 entry point is via a function pointer "gdbarch_overlay_update",
3352 so targets that use a different runtime overlay manager can
3353 substitute their own overlay_update function and take over the
3356 The overlay_update function pokes around in the target's data structures
3357 to see what overlays are mapped, and updates GDB's overlay mapping with
3360 In this simple implementation, the target data structures are as follows:
3361 unsigned _novlys; /# number of overlay sections #/
3362 unsigned _ovly_table[_novlys][4] = {
3363 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3364 {..., ..., ..., ...},
3366 unsigned _novly_regions; /# number of overlay regions #/
3367 unsigned _ovly_region_table[_novly_regions][3] = {
3368 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3371 These functions will attempt to update GDB's mappedness state in the
3372 symbol section table, based on the target's mappedness state.
3374 To do this, we keep a cached copy of the target's _ovly_table, and
3375 attempt to detect when the cached copy is invalidated. The main
3376 entry point is "simple_overlay_update(SECT), which looks up SECT in
3377 the cached table and re-reads only the entry for that section from
3378 the target (whenever possible). */
3380 /* Cached, dynamically allocated copies of the target data structures: */
3381 static unsigned (*cache_ovly_table
)[4] = 0;
3382 static unsigned cache_novlys
= 0;
3383 static CORE_ADDR cache_ovly_table_base
= 0;
3386 VMA
, OSIZE
, LMA
, MAPPED
3389 /* Throw away the cached copy of _ovly_table. */
3392 simple_free_overlay_table (void)
3394 xfree (cache_ovly_table
);
3396 cache_ovly_table
= NULL
;
3397 cache_ovly_table_base
= 0;
3400 /* Read an array of ints of size SIZE from the target into a local buffer.
3401 Convert to host order. int LEN is number of ints. */
3404 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3405 int len
, int size
, enum bfd_endian byte_order
)
3407 /* FIXME (alloca): Not safe if array is very large. */
3408 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3411 read_memory (memaddr
, buf
, len
* size
);
3412 for (i
= 0; i
< len
; i
++)
3413 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3416 /* Find and grab a copy of the target _ovly_table
3417 (and _novlys, which is needed for the table's size). */
3420 simple_read_overlay_table (void)
3422 struct bound_minimal_symbol novlys_msym
;
3423 struct bound_minimal_symbol ovly_table_msym
;
3424 struct gdbarch
*gdbarch
;
3426 enum bfd_endian byte_order
;
3428 simple_free_overlay_table ();
3429 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3430 if (! novlys_msym
.minsym
)
3432 error (_("Error reading inferior's overlay table: "
3433 "couldn't find `_novlys' variable\n"
3434 "in inferior. Use `overlay manual' mode."));
3438 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3439 if (! ovly_table_msym
.minsym
)
3441 error (_("Error reading inferior's overlay table: couldn't find "
3442 "`_ovly_table' array\n"
3443 "in inferior. Use `overlay manual' mode."));
3447 gdbarch
= ovly_table_msym
.objfile
->arch ();
3448 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3449 byte_order
= gdbarch_byte_order (gdbarch
);
3451 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3454 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3455 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3456 read_target_long_array (cache_ovly_table_base
,
3457 (unsigned int *) cache_ovly_table
,
3458 cache_novlys
* 4, word_size
, byte_order
);
3460 return 1; /* SUCCESS */
3463 /* Function: simple_overlay_update_1
3464 A helper function for simple_overlay_update. Assuming a cached copy
3465 of _ovly_table exists, look through it to find an entry whose vma,
3466 lma and size match those of OSECT. Re-read the entry and make sure
3467 it still matches OSECT (else the table may no longer be valid).
3468 Set OSECT's mapped state to match the entry. Return: 1 for
3469 success, 0 for failure. */
3472 simple_overlay_update_1 (struct obj_section
*osect
)
3475 asection
*bsect
= osect
->the_bfd_section
;
3476 struct gdbarch
*gdbarch
= osect
->objfile
->arch ();
3477 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3478 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3480 for (i
= 0; i
< cache_novlys
; i
++)
3481 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3482 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3484 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3485 (unsigned int *) cache_ovly_table
[i
],
3486 4, word_size
, byte_order
);
3487 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3488 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3490 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3493 else /* Warning! Warning! Target's ovly table has changed! */
3499 /* Function: simple_overlay_update
3500 If OSECT is NULL, then update all sections' mapped state
3501 (after re-reading the entire target _ovly_table).
3502 If OSECT is non-NULL, then try to find a matching entry in the
3503 cached ovly_table and update only OSECT's mapped state.
3504 If a cached entry can't be found or the cache isn't valid, then
3505 re-read the entire cache, and go ahead and update all sections. */
3508 simple_overlay_update (struct obj_section
*osect
)
3510 /* Were we given an osect to look up? NULL means do all of them. */
3512 /* Have we got a cached copy of the target's overlay table? */
3513 if (cache_ovly_table
!= NULL
)
3515 /* Does its cached location match what's currently in the
3517 struct bound_minimal_symbol minsym
3518 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3520 if (minsym
.minsym
== NULL
)
3521 error (_("Error reading inferior's overlay table: couldn't "
3522 "find `_ovly_table' array\n"
3523 "in inferior. Use `overlay manual' mode."));
3525 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3526 /* Then go ahead and try to look up this single section in
3528 if (simple_overlay_update_1 (osect
))
3529 /* Found it! We're done. */
3533 /* Cached table no good: need to read the entire table anew.
3534 Or else we want all the sections, in which case it's actually
3535 more efficient to read the whole table in one block anyway. */
3537 if (! simple_read_overlay_table ())
3540 /* Now may as well update all sections, even if only one was requested. */
3541 for (objfile
*objfile
: current_program_space
->objfiles ())
3542 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3543 if (section_is_overlay (osect
))
3546 asection
*bsect
= osect
->the_bfd_section
;
3548 for (i
= 0; i
< cache_novlys
; i
++)
3549 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3550 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3551 { /* obj_section matches i'th entry in ovly_table. */
3552 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3553 break; /* finished with inner for loop: break out. */
3558 /* Default implementation for sym_relocate. */
3561 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3564 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3566 bfd
*abfd
= sectp
->owner
;
3568 /* We're only interested in sections with relocation
3570 if ((sectp
->flags
& SEC_RELOC
) == 0)
3573 /* We will handle section offsets properly elsewhere, so relocate as if
3574 all sections begin at 0. */
3575 for (asection
*sect
: gdb_bfd_sections (abfd
))
3577 sect
->output_section
= sect
;
3578 sect
->output_offset
= 0;
3581 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3584 /* Relocate the contents of a debug section SECTP in ABFD. The
3585 contents are stored in BUF if it is non-NULL, or returned in a
3586 malloc'd buffer otherwise.
3588 For some platforms and debug info formats, shared libraries contain
3589 relocations against the debug sections (particularly for DWARF-2;
3590 one affected platform is PowerPC GNU/Linux, although it depends on
3591 the version of the linker in use). Also, ELF object files naturally
3592 have unresolved relocations for their debug sections. We need to apply
3593 the relocations in order to get the locations of symbols correct.
3594 Another example that may require relocation processing, is the
3595 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3599 symfile_relocate_debug_section (struct objfile
*objfile
,
3600 asection
*sectp
, bfd_byte
*buf
)
3602 gdb_assert (objfile
->sf
->sym_relocate
);
3604 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3607 symfile_segment_data_up
3608 get_symfile_segment_data (bfd
*abfd
)
3610 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3615 return sf
->sym_segments (abfd
);
3619 - DATA, containing segment addresses from the object file ABFD, and
3620 the mapping from ABFD's sections onto the segments that own them,
3622 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3623 segment addresses reported by the target,
3624 store the appropriate offsets for each section in OFFSETS.
3626 If there are fewer entries in SEGMENT_BASES than there are segments
3627 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3629 If there are more entries, then ignore the extra. The target may
3630 not be able to distinguish between an empty data segment and a
3631 missing data segment; a missing text segment is less plausible. */
3634 symfile_map_offsets_to_segments (bfd
*abfd
,
3635 const struct symfile_segment_data
*data
,
3636 section_offsets
&offsets
,
3637 int num_segment_bases
,
3638 const CORE_ADDR
*segment_bases
)
3643 /* It doesn't make sense to call this function unless you have some
3644 segment base addresses. */
3645 gdb_assert (num_segment_bases
> 0);
3647 /* If we do not have segment mappings for the object file, we
3648 can not relocate it by segments. */
3649 gdb_assert (data
!= NULL
);
3650 gdb_assert (data
->segments
.size () > 0);
3652 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3654 int which
= data
->segment_info
[i
];
3656 gdb_assert (0 <= which
&& which
<= data
->segments
.size ());
3658 /* Don't bother computing offsets for sections that aren't
3659 loaded as part of any segment. */
3663 /* Use the last SEGMENT_BASES entry as the address of any extra
3664 segments mentioned in DATA->segment_info. */
3665 if (which
> num_segment_bases
)
3666 which
= num_segment_bases
;
3668 offsets
[i
] = segment_bases
[which
- 1] - data
->segments
[which
- 1].base
;
3675 symfile_find_segment_sections (struct objfile
*objfile
)
3677 bfd
*abfd
= objfile
->obfd
;
3681 symfile_segment_data_up data
3682 = get_symfile_segment_data (objfile
->obfd
);
3686 if (data
->segments
.size () != 1 && data
->segments
.size () != 2)
3689 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3691 int which
= data
->segment_info
[i
];
3695 if (objfile
->sect_index_text
== -1)
3696 objfile
->sect_index_text
= sect
->index
;
3698 if (objfile
->sect_index_rodata
== -1)
3699 objfile
->sect_index_rodata
= sect
->index
;
3701 else if (which
== 2)
3703 if (objfile
->sect_index_data
== -1)
3704 objfile
->sect_index_data
= sect
->index
;
3706 if (objfile
->sect_index_bss
== -1)
3707 objfile
->sect_index_bss
= sect
->index
;
3712 /* Listen for free_objfile events. */
3715 symfile_free_objfile (struct objfile
*objfile
)
3717 /* Remove the target sections owned by this objfile. */
3718 if (objfile
!= NULL
)
3719 current_program_space
->remove_target_sections ((void *) objfile
);
3722 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3723 Expand all symtabs that match the specified criteria.
3724 See quick_symbol_functions.expand_symtabs_matching for details. */
3727 expand_symtabs_matching
3728 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3729 const lookup_name_info
&lookup_name
,
3730 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3731 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3732 enum search_domain kind
)
3734 for (objfile
*objfile
: current_program_space
->objfiles ())
3735 objfile
->expand_symtabs_matching (file_matcher
,
3738 expansion_notify
, kind
);
3741 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3742 Map function FUN over every file.
3743 See quick_symbol_functions.map_symbol_filenames for details. */
3746 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3749 for (objfile
*objfile
: current_program_space
->objfiles ())
3750 objfile
->map_symbol_filenames (fun
, data
, need_fullname
);
3755 namespace selftests
{
3756 namespace filename_language
{
3758 static void test_filename_language ()
3760 /* This test messes up the filename_language_table global. */
3761 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3763 /* Test deducing an unknown extension. */
3764 language lang
= deduce_language_from_filename ("myfile.blah");
3765 SELF_CHECK (lang
== language_unknown
);
3767 /* Test deducing a known extension. */
3768 lang
= deduce_language_from_filename ("myfile.c");
3769 SELF_CHECK (lang
== language_c
);
3771 /* Test adding a new extension using the internal API. */
3772 add_filename_language (".blah", language_pascal
);
3773 lang
= deduce_language_from_filename ("myfile.blah");
3774 SELF_CHECK (lang
== language_pascal
);
3778 test_set_ext_lang_command ()
3780 /* This test messes up the filename_language_table global. */
3781 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3783 /* Confirm that the .hello extension is not known. */
3784 language lang
= deduce_language_from_filename ("cake.hello");
3785 SELF_CHECK (lang
== language_unknown
);
3787 /* Test adding a new extension using the CLI command. */
3788 auto args_holder
= make_unique_xstrdup (".hello rust");
3789 ext_args
= args_holder
.get ();
3790 set_ext_lang_command (NULL
, 1, NULL
);
3792 lang
= deduce_language_from_filename ("cake.hello");
3793 SELF_CHECK (lang
== language_rust
);
3795 /* Test overriding an existing extension using the CLI command. */
3796 int size_before
= filename_language_table
.size ();
3797 args_holder
.reset (xstrdup (".hello pascal"));
3798 ext_args
= args_holder
.get ();
3799 set_ext_lang_command (NULL
, 1, NULL
);
3800 int size_after
= filename_language_table
.size ();
3802 lang
= deduce_language_from_filename ("cake.hello");
3803 SELF_CHECK (lang
== language_pascal
);
3804 SELF_CHECK (size_before
== size_after
);
3807 } /* namespace filename_language */
3808 } /* namespace selftests */
3810 #endif /* GDB_SELF_TEST */
3812 void _initialize_symfile ();
3814 _initialize_symfile ()
3816 struct cmd_list_element
*c
;
3818 gdb::observers::free_objfile
.attach (symfile_free_objfile
);
3820 #define READNOW_READNEVER_HELP \
3821 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3822 immediately. This makes the command slower, but may make future operations\n\
3824 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3825 symbolic debug information."
3827 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3828 Load symbol table from executable file FILE.\n\
3829 Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
3830 OFF is an optional offset which is added to each section address.\n\
3831 The `file' command can also load symbol tables, as well as setting the file\n\
3832 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3833 set_cmd_completer (c
, filename_completer
);
3835 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3836 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3837 Usage: add-symbol-file FILE [-readnow | -readnever] [-o OFF] [ADDR] \
3838 [-s SECT-NAME SECT-ADDR]...\n\
3839 ADDR is the starting address of the file's text.\n\
3840 Each '-s' argument provides a section name and address, and\n\
3841 should be specified if the data and bss segments are not contiguous\n\
3842 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n\
3843 OFF is an optional offset which is added to the default load addresses\n\
3844 of all sections for which no other address was specified.\n"
3845 READNOW_READNEVER_HELP
),
3847 set_cmd_completer (c
, filename_completer
);
3849 c
= add_cmd ("remove-symbol-file", class_files
,
3850 remove_symbol_file_command
, _("\
3851 Remove a symbol file added via the add-symbol-file command.\n\
3852 Usage: remove-symbol-file FILENAME\n\
3853 remove-symbol-file -a ADDRESS\n\
3854 The file to remove can be identified by its filename or by an address\n\
3855 that lies within the boundaries of this symbol file in memory."),
3858 c
= add_cmd ("load", class_files
, load_command
, _("\
3859 Dynamically load FILE into the running program.\n\
3860 FILE symbols are recorded for access from GDB.\n\
3861 Usage: load [FILE] [OFFSET]\n\
3862 An optional load OFFSET may also be given as a literal address.\n\
3863 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3864 on its own."), &cmdlist
);
3865 set_cmd_completer (c
, filename_completer
);
3867 add_basic_prefix_cmd ("overlay", class_support
,
3868 _("Commands for debugging overlays."), &overlaylist
,
3869 "overlay ", 0, &cmdlist
);
3871 add_com_alias ("ovly", "overlay", class_support
, 1);
3872 add_com_alias ("ov", "overlay", class_support
, 1);
3874 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3875 _("Assert that an overlay section is mapped."), &overlaylist
);
3877 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3878 _("Assert that an overlay section is unmapped."), &overlaylist
);
3880 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3881 _("List mappings of overlay sections."), &overlaylist
);
3883 add_cmd ("manual", class_support
, overlay_manual_command
,
3884 _("Enable overlay debugging."), &overlaylist
);
3885 add_cmd ("off", class_support
, overlay_off_command
,
3886 _("Disable overlay debugging."), &overlaylist
);
3887 add_cmd ("auto", class_support
, overlay_auto_command
,
3888 _("Enable automatic overlay debugging."), &overlaylist
);
3889 add_cmd ("load-target", class_support
, overlay_load_command
,
3890 _("Read the overlay mapping state from the target."), &overlaylist
);
3892 /* Filename extension to source language lookup table: */
3893 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3895 Set mapping between filename extension and source language."), _("\
3896 Show mapping between filename extension and source language."), _("\
3897 Usage: set extension-language .foo bar"),
3898 set_ext_lang_command
,
3900 &setlist
, &showlist
);
3902 add_info ("extensions", info_ext_lang_command
,
3903 _("All filename extensions associated with a source language."));
3905 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3906 &debug_file_directory
, _("\
3907 Set the directories where separate debug symbols are searched for."), _("\
3908 Show the directories where separate debug symbols are searched for."), _("\
3909 Separate debug symbols are first searched for in the same\n\
3910 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3911 and lastly at the path of the directory of the binary with\n\
3912 each global debug-file-directory component prepended."),
3914 show_debug_file_directory
,
3915 &setlist
, &showlist
);
3917 add_setshow_enum_cmd ("symbol-loading", no_class
,
3918 print_symbol_loading_enums
, &print_symbol_loading
,
3920 Set printing of symbol loading messages."), _("\
3921 Show printing of symbol loading messages."), _("\
3922 off == turn all messages off\n\
3923 brief == print messages for the executable,\n\
3924 and brief messages for shared libraries\n\
3925 full == print messages for the executable,\n\
3926 and messages for each shared library."),
3929 &setprintlist
, &showprintlist
);
3931 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3932 &separate_debug_file_debug
, _("\
3933 Set printing of separate debug info file search debug."), _("\
3934 Show printing of separate debug info file search debug."), _("\
3935 When on, GDB prints the searched locations while looking for separate debug \
3936 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
3939 selftests::register_test
3940 ("filename_language", selftests::filename_language::test_filename_language
);
3941 selftests::register_test
3942 ("set_ext_lang_command",
3943 selftests::filename_language::test_set_ext_lang_command
);